Integrate AudioMixer for audio export.

Adds support for compositions with multiple audio sequences.

PiperOrigin-RevId: 550880626

libraries/test_data/src/test/assets/transformerdumps/mp4/sample.mp4.silentaudio.dump

@@ -325,16 +325,16 @@ sample:
   presentationTimeUs = 464399
 sample:
   trackIndex = 1
-  dataHashCode = 1742602241
+  dataHashCode = 1728208641
-  size = 4096
+  size = 2184
   isKeyFrame = true
   presentationTimeUs = 487619
 sample:
   trackIndex = 1
-  dataHashCode = 1742602241
+  dataHashCode = 620404993
-  size = 4096
+  size = 6008
   isKeyFrame = true
-  presentationTimeUs = 510839
+  presentationTimeUs = 500000
 sample:
   trackIndex = 1
   dataHashCode = 1742602241
@@ -403,16 +403,10 @@ sample:
   presentationTimeUs = 766258
 sample:
   trackIndex = 1
-  dataHashCode = 1742602241
+  dataHashCode = -809762815
-  size = 4096
+  size = 8192
   isKeyFrame = true
   presentationTimeUs = 789478
-sample:
-  trackIndex = 1
-  dataHashCode = 1742602241
-  size = 4096
-  isKeyFrame = true
-  presentationTimeUs = 812698
 sample:
   trackIndex = 1
   dataHashCode = 1742602241
@@ -457,14 +451,14 @@ sample:
   presentationTimeUs = 975238
 sample:
   trackIndex = 1
-  dataHashCode = 1742602241
+  dataHashCode = 1097317889
-  size = 4096
+  size = 272
   isKeyFrame = true
   presentationTimeUs = 998458
 sample:
   trackIndex = 1
-  dataHashCode = -587391743
+  dataHashCode = -873373951
-  size = 408
+  size = 4232
   isKeyFrame = true
-  presentationTimeUs = 1021678
+  presentationTimeUs = 1000000
 released = true

libraries/test_data/src/test/assets/transformerdumps/mp4/sample.mp4.silentaudio_48000hz.dump

@@ -325,16 +325,16 @@ sample:
   presentationTimeUs = 464395
 sample:
   trackIndex = 1
-  dataHashCode = -266855807
+  dataHashCode = -907321727
-  size = 4460
+  size = 2380
   isKeyFrame = true
   presentationTimeUs = 487604
 sample:
   trackIndex = 1
-  dataHashCode = 864256769
+  dataHashCode = -813809919
-  size = 4456
+  size = 6536
   isKeyFrame = true
-  presentationTimeUs = 510833
+  presentationTimeUs = 500000
 sample:
   trackIndex = 1
   dataHashCode = -266855807
@@ -403,16 +403,10 @@ sample:
   presentationTimeUs = 766250
 sample:
   trackIndex = 1
-  dataHashCode = -266855807
+  dataHashCode = -2002051711
-  size = 4460
+  size = 8916
   isKeyFrame = true
   presentationTimeUs = 789458
-sample:
-  trackIndex = 1
-  dataHashCode = 864256769
-  size = 4456
-  isKeyFrame = true
-  presentationTimeUs = 812687
 sample:
   trackIndex = 1
   dataHashCode = -266855807
@@ -457,16 +451,16 @@ sample:
   presentationTimeUs = 975229
 sample:
   trackIndex = 1
-  dataHashCode = -266855807
+  dataHashCode = 634299009
-  size = 4460
+  size = 300
   isKeyFrame = true
   presentationTimeUs = 998437
 sample:
   trackIndex = 1
-  dataHashCode = -115707775
+  dataHashCode = -1577850751
-  size = 444
+  size = 4604
   isKeyFrame = true
-  presentationTimeUs = 1021666
+  presentationTimeUs = 1000000
 sample:
   trackIndex = 1
   dataHashCode = 923521

libraries/test_data/src/test/assets/transformerdumps/mp4/sample_18byte_nclx_colr.mp4.silentaudio.dump

@@ -330,16 +330,16 @@ sample:
   presentationTimeUs = 464399
 sample:
   trackIndex = 1
-  dataHashCode = 1742602241
+  dataHashCode = 1728208641
-  size = 4096
+  size = 2184
   isKeyFrame = true
   presentationTimeUs = 487619
 sample:
   trackIndex = 1
-  dataHashCode = 1742602241
+  dataHashCode = 620404993
-  size = 4096
+  size = 6008
   isKeyFrame = true
-  presentationTimeUs = 510839
+  presentationTimeUs = 500000
 sample:
   trackIndex = 1
   dataHashCode = 1742602241
@@ -408,16 +408,10 @@ sample:
   presentationTimeUs = 766258
 sample:
   trackIndex = 1
-  dataHashCode = 1742602241
+  dataHashCode = -809762815
-  size = 4096
+  size = 8192
   isKeyFrame = true
   presentationTimeUs = 789478
-sample:
-  trackIndex = 1
-  dataHashCode = 1742602241
-  size = 4096
-  isKeyFrame = true
-  presentationTimeUs = 812698
 sample:
   trackIndex = 1
   dataHashCode = 1742602241
@@ -462,8 +456,14 @@ sample:
   presentationTimeUs = 975238
 sample:
   trackIndex = 1
-  dataHashCode = 226248705
+  dataHashCode = 1097317889
-  size = 448
+  size = 272
   isKeyFrame = true
   presentationTimeUs = 998458
+sample:
+  trackIndex = 1
+  dataHashCode = 799574529
+  size = 176
+  isKeyFrame = true
+  presentationTimeUs = 1000000
 released = true

libraries/test_data/src/test/assets/transformerdumps/mp4/sowt-with-video.mov.audio_then_silence.dump

@@ -1364,16 +1364,16 @@ sample:
   presentationTimeUs = 469333
 sample:
   trackIndex = 1
-  dataHashCode = -2030181452
+  dataHashCode = 339365731
-  size = 4096
+  size = 3840
   isKeyFrame = true
   presentationTimeUs = 480000
 sample:
   trackIndex = 1
-  dataHashCode = -1131911551
+  dataHashCode = 1278884562
-  size = 4096
+  size = 4352
   isKeyFrame = true
-  presentationTimeUs = 501333
+  presentationTimeUs = 500000
 sample:
   trackIndex = 1
   dataHashCode = 1174956589
@@ -1508,16 +1508,16 @@ sample:
   presentationTimeUs = 960000
 sample:
   trackIndex = 1
-  dataHashCode = 196164772
+  dataHashCode = 43993965
-  size = 4096
+  size = 3584
   isKeyFrame = true
   presentationTimeUs = 981333
 sample:
   trackIndex = 1
-  dataHashCode = -1100787564
+  dataHashCode = 984760779
-  size = 4096
+  size = 4608
   isKeyFrame = true
-  presentationTimeUs = 1002666
+  presentationTimeUs = 1000000
 sample:
   trackIndex = 1
   dataHashCode = -1345957974
@@ -1652,16 +1652,16 @@ sample:
   presentationTimeUs = 1461333
 sample:
   trackIndex = 1
-  dataHashCode = -1972687910
+  dataHashCode = 674218658
-  size = 4096
+  size = 3328
   isKeyFrame = true
   presentationTimeUs = 1482666
 sample:
   trackIndex = 1
-  dataHashCode = -1063379599
+  dataHashCode = -324278615
-  size = 4096
+  size = 4864
   isKeyFrame = true
-  presentationTimeUs = 1504000
+  presentationTimeUs = 1500000
 sample:
   trackIndex = 1
   dataHashCode = 496920829
@@ -1934,16 +1934,16 @@ sample:
   presentationTimeUs = 2469333
 sample:
   trackIndex = 1
-  dataHashCode = 1742602241
+  dataHashCode = 795942913
-  size = 4096
+  size = 1792
   isKeyFrame = true
   presentationTimeUs = 2490666
 sample:
   trackIndex = 1
-  dataHashCode = 1742602241
+  dataHashCode = 1682628609
-  size = 4096
+  size = 6400
   isKeyFrame = true
-  presentationTimeUs = 2512000
+  presentationTimeUs = 2500000
 sample:
   trackIndex = 1
   dataHashCode = 1742602241
@@ -2000,16 +2000,10 @@ sample:
   presentationTimeUs = 2704000
 sample:
   trackIndex = 1
-  dataHashCode = 1742602241
+  dataHashCode = -809762815
-  size = 4096
+  size = 8192
   isKeyFrame = true
   presentationTimeUs = 2725333
-sample:
-  trackIndex = 1
-  dataHashCode = 1742602241
-  size = 4096
-  isKeyFrame = true
-  presentationTimeUs = 2746666
 sample:
   trackIndex = 1
   dataHashCode = 1742602241
@@ -2072,16 +2066,16 @@ sample:
   presentationTimeUs = 2960000
 sample:
   trackIndex = 1
-  dataHashCode = 1742602241
+  dataHashCode = -1562230783
-  size = 4096
+  size = 3584
   isKeyFrame = true
   presentationTimeUs = 2981333
 sample:
   trackIndex = 1
-  dataHashCode = 1742602241
+  dataHashCode = 1020903425
-  size = 4096
+  size = 4608
   isKeyFrame = true
-  presentationTimeUs = 3002666
+  presentationTimeUs = 3000000
 sample:
   trackIndex = 1
   dataHashCode = 1742602241
@@ -2138,16 +2132,10 @@ sample:
   presentationTimeUs = 3194666
 sample:
   trackIndex = 1
-  dataHashCode = 1742602241
+  dataHashCode = -809762815
-  size = 4096
+  size = 8192
   isKeyFrame = true
   presentationTimeUs = 3216000
-sample:
-  trackIndex = 1
-  dataHashCode = 1742602241
-  size = 4096
-  isKeyFrame = true
-  presentationTimeUs = 3237333
 sample:
   trackIndex = 1
   dataHashCode = 1742602241
@@ -2216,28 +2204,22 @@ sample:
   presentationTimeUs = 3472000
 sample:
   trackIndex = 1
-  dataHashCode = 1742602241
+  dataHashCode = -1300930559
-  size = 4096
+  size = 1280
   isKeyFrame = true
   presentationTimeUs = 3493333
 sample:
   trackIndex = 1
-  dataHashCode = 1742602241
+  dataHashCode = -2126077951
-  size = 4096
+  size = 6912
   isKeyFrame = true
-  presentationTimeUs = 3514666
+  presentationTimeUs = 3500000
 sample:
   trackIndex = 1
-  dataHashCode = 1742602241
+  dataHashCode = -809762815
-  size = 4096
+  size = 8192
   isKeyFrame = true
   presentationTimeUs = 3536000
-sample:
-  trackIndex = 1
-  dataHashCode = 1742602241
-  size = 4096
-  isKeyFrame = true
-  presentationTimeUs = 3557333
 sample:
   trackIndex = 1
   dataHashCode = 1742602241
@@ -2300,16 +2282,10 @@ sample:
   presentationTimeUs = 3770666
 sample:
   trackIndex = 1
-  dataHashCode = 1742602241
+  dataHashCode = -809762815
-  size = 4096
+  size = 8192
   isKeyFrame = true
   presentationTimeUs = 3792000
-sample:
-  trackIndex = 1
-  dataHashCode = 1742602241
-  size = 4096
-  isKeyFrame = true
-  presentationTimeUs = 3813333
 sample:
   trackIndex = 1
   dataHashCode = 1742602241
@@ -2342,16 +2318,10 @@ sample:
   presentationTimeUs = 3920000
 sample:
   trackIndex = 1
-  dataHashCode = 1742602241
+  dataHashCode = -809762815
-  size = 4096
+  size = 8192
   isKeyFrame = true
   presentationTimeUs = 3941333
-sample:
-  trackIndex = 1
-  dataHashCode = 1742602241
-  size = 4096
-  isKeyFrame = true
-  presentationTimeUs = 3962666
 sample:
   trackIndex = 1
   dataHashCode = -303661055

libraries/test_data/src/test/assets/transformerdumps/mp4/sowt-with-video.mov.audio_then_silence_with_effects.dump

@@ -1370,16 +1370,16 @@ sample:
   presentationTimeUs = 473041
 sample:
   trackIndex = 1
-  dataHashCode = 1826317146
+  dataHashCode = -1675350578
-  size = 5496
+  size = 1072
   isKeyFrame = true
   presentationTimeUs = 494416
 sample:
   trackIndex = 1
-  dataHashCode = -531342616
+  dataHashCode = 1988292468
-  size = 2244
+  size = 6668
   isKeyFrame = true
-  presentationTimeUs = 523041
+  presentationTimeUs = 500000
 sample:
   trackIndex = 1
   dataHashCode = -1851185779
@@ -1514,10 +1514,16 @@ sample:
   presentationTimeUs = 973687
 sample:
   trackIndex = 1
-  dataHashCode = 722898605
+  dataHashCode = -548794611
-  size = 3948
+  size = 916
   isKeyFrame = true
   presentationTimeUs = 995229
+sample:
+  trackIndex = 1
+  dataHashCode = 1540981665
+  size = 3032
+  isKeyFrame = true
+  presentationTimeUs = 1000000
 sample:
   trackIndex = 1
   dataHashCode = 2079609877
@@ -1658,16 +1664,16 @@ sample:
   presentationTimeUs = 1475208
 sample:
   trackIndex = 1
-  dataHashCode = -1378914891
+  dataHashCode = -1399651613
-  size = 4212
+  size = 1000
   isKeyFrame = true
   presentationTimeUs = 1494791
 sample:
   trackIndex = 1
-  dataHashCode = 1064131864
+  dataHashCode = -534820118
-  size = 3968
+  size = 7180
   isKeyFrame = true
-  presentationTimeUs = 1516729
+  presentationTimeUs = 1500000
 sample:
   trackIndex = 1
   dataHashCode = -586081352
@@ -1790,10 +1796,16 @@ sample:
   presentationTimeUs = 1958354
 sample:
   trackIndex = 1
-  dataHashCode = -1694434488
+  dataHashCode = -1218889090
-  size = 5444
+  size = 5440
   isKeyFrame = true
   presentationTimeUs = 1971666
+sample:
+  trackIndex = 1
+  dataHashCode = -833717
+  size = 4
+  isKeyFrame = true
+  presentationTimeUs = 2000000
 sample:
   trackIndex = 1
   dataHashCode = 698618881
@@ -1934,16 +1946,16 @@ sample:
   presentationTimeUs = 2460020
 sample:
   trackIndex = 1
-  dataHashCode = 202646529
+  dataHashCode = 1734624385
-  size = 4320
+  size = 3356
   isKeyFrame = true
   presentationTimeUs = 2482520
 sample:
   trackIndex = 1
-  dataHashCode = -1017110527
+  dataHashCode = -57524351
-  size = 3840
+  size = 4804
   isKeyFrame = true
-  presentationTimeUs = 2505020
+  presentationTimeUs = 2500000
 sample:
   trackIndex = 1
   dataHashCode = 202646529
@@ -1994,16 +2006,10 @@ sample:
   presentationTimeUs = 2675020
 sample:
   trackIndex = 1
-  dataHashCode = 202646529
+  dataHashCode = -738966527
-  size = 4320
+  size = 8160
   isKeyFrame = true
   presentationTimeUs = 2695020
-sample:
-  trackIndex = 1
-  dataHashCode = -1017110527
-  size = 3840
-  isKeyFrame = true
-  presentationTimeUs = 2717520
 sample:
   trackIndex = 1
   dataHashCode = 202646529
@@ -2078,16 +2084,16 @@ sample:
   presentationTimeUs = 2972520
 sample:
   trackIndex = 1
-  dataHashCode = -1017110527
+  dataHashCode = 1878405249
-  size = 3840
+  size = 956
   isKeyFrame = true
   presentationTimeUs = 2995020
 sample:
   trackIndex = 1
-  dataHashCode = 202646529
+  dataHashCode = -1054059647
-  size = 4320
+  size = 7204
   isKeyFrame = true
-  presentationTimeUs = 3015020
+  presentationTimeUs = 3000000
 sample:
   trackIndex = 1
   dataHashCode = -1017110527
@@ -2132,16 +2138,10 @@ sample:
   presentationTimeUs = 3165020
 sample:
   trackIndex = 1
-  dataHashCode = -1017110527
+  dataHashCode = -738966527
-  size = 3840
+  size = 8160
   isKeyFrame = true
   presentationTimeUs = 3187520
-sample:
-  trackIndex = 1
-  dataHashCode = 202646529
-  size = 4320
-  isKeyFrame = true
-  presentationTimeUs = 3207520
 sample:
   trackIndex = 1
   dataHashCode = -1017110527
@@ -2216,28 +2216,22 @@ sample:
   presentationTimeUs = 3465020
 sample:
   trackIndex = 1
-  dataHashCode = 202646529
+  dataHashCode = 1278099585
-  size = 4320
+  size = 2876
   isKeyFrame = true
   presentationTimeUs = 3485020
 sample:
   trackIndex = 1
-  dataHashCode = -1017110527
+  dataHashCode = 1942242177
-  size = 3840
+  size = 5284
   isKeyFrame = true
-  presentationTimeUs = 3507520
+  presentationTimeUs = 3500000
 sample:
   trackIndex = 1
-  dataHashCode = 202646529
+  dataHashCode = -738966527
-  size = 4320
+  size = 8160
   isKeyFrame = true
   presentationTimeUs = 3527520
-sample:
-  trackIndex = 1
-  dataHashCode = -1017110527
-  size = 3840
-  isKeyFrame = true
-  presentationTimeUs = 3550020
 sample:
   trackIndex = 1
   dataHashCode = 202646529
@@ -2300,16 +2294,10 @@ sample:
   presentationTimeUs = 3762520
 sample:
   trackIndex = 1
-  dataHashCode = -1017110527
+  dataHashCode = -738966527
-  size = 3840
+  size = 8160
   isKeyFrame = true
   presentationTimeUs = 3785020
-sample:
-  trackIndex = 1
-  dataHashCode = 202646529
-  size = 4320
-  isKeyFrame = true
-  presentationTimeUs = 3805020
 sample:
   trackIndex = 1
   dataHashCode = -1017110527
@@ -2354,8 +2342,14 @@ sample:
   presentationTimeUs = 3955020
 sample:
   trackIndex = 1
-  dataHashCode = -2096740479
+  dataHashCode = -933078911
-  size = 5764
+  size = 5756
   isKeyFrame = true
   presentationTimeUs = 3970020
+sample:
+  trackIndex = 1
+  dataHashCode = -1807454463
+  size = 8
+  isKeyFrame = true
+  presentationTimeUs = 4000000
 released = true

libraries/test_data/src/test/assets/transformerdumps/mp4/sowt-with-video.mov.silence-effects_then_silence.dump

@@ -1350,16 +1350,16 @@ sample:
   presentationTimeUs = 458911
 sample:
   trackIndex = 1
-  dataHashCode = 571187457
+  dataHashCode = 836580609
-  size = 3960
+  size = 3288
   isKeyFrame = true
   presentationTimeUs = 481360
 sample:
   trackIndex = 1
-  dataHashCode = -1264223743
+  dataHashCode = -1141905919
-  size = 4400
+  size = 5072
   isKeyFrame = true
-  presentationTimeUs = 503809
+  presentationTimeUs = 500000
 sample:
   trackIndex = 1
   dataHashCode = 571187457
@@ -1428,16 +1428,10 @@ sample:
   presentationTimeUs = 760702
 sample:
   trackIndex = 1
-  dataHashCode = 571187457
+  dataHashCode = 644553473
-  size = 3960
+  size = 8360
   isKeyFrame = true
   presentationTimeUs = 783151
-sample:
-  trackIndex = 1
-  dataHashCode = -1264223743
-  size = 4400
-  isKeyFrame = true
-  presentationTimeUs = 805600
 sample:
   trackIndex = 1
   dataHashCode = 571187457
@@ -1482,16 +1476,16 @@ sample:
   presentationTimeUs = 967709
 sample:
   trackIndex = 1
-  dataHashCode = 571187457
+  dataHashCode = 744439297
-  size = 3960
+  size = 1296
   isKeyFrame = true
   presentationTimeUs = 992653
 sample:
   trackIndex = 1
-  dataHashCode = 571187457
+  dataHashCode = -1744763903
-  size = 3960
+  size = 6624
   isKeyFrame = true
-  presentationTimeUs = 1015102
+  presentationTimeUs = 1000000
 sample:
   trackIndex = 1
   dataHashCode = -1264223743
@@ -1530,16 +1524,10 @@ sample:
   presentationTimeUs = 1154761
 sample:
   trackIndex = 1
-  dataHashCode = -1264223743
+  dataHashCode = 644553473
-  size = 4400
+  size = 8360
   isKeyFrame = true
   presentationTimeUs = 1177210
-sample:
-  trackIndex = 1
-  dataHashCode = 571187457
-  size = 3960
-  isKeyFrame = true
-  presentationTimeUs = 1202154
 sample:
   trackIndex = 1
   dataHashCode = 571187457
@@ -1590,16 +1578,10 @@ sample:
   presentationTimeUs = 1386712
 sample:
   trackIndex = 1
-  dataHashCode = -1264223743
+  dataHashCode = 644553473
-  size = 4400
+  size = 8360
   isKeyFrame = true
   presentationTimeUs = 1409160
-sample:
-  trackIndex = 1
-  dataHashCode = 571187457
-  size = 3960
-  isKeyFrame = true
-  presentationTimeUs = 1434104
 sample:
   trackIndex = 1
   dataHashCode = 571187457
@@ -1608,16 +1590,16 @@ sample:
   presentationTimeUs = 1456553
 sample:
   trackIndex = 1
-  dataHashCode = -1264223743
+  dataHashCode = -206716671
-  size = 4400
+  size = 3704
   isKeyFrame = true
   presentationTimeUs = 1479002
 sample:
   trackIndex = 1
-  dataHashCode = 571187457
+  dataHashCode = -102540799
-  size = 3960
+  size = 4656
   isKeyFrame = true
-  presentationTimeUs = 1503945
+  presentationTimeUs = 1500000
 sample:
   trackIndex = 1
   dataHashCode = 571187457
@@ -1632,16 +1614,10 @@ sample:
   presentationTimeUs = 1548843
 sample:
   trackIndex = 1
-  dataHashCode = 571187457
+  dataHashCode = 2136490497
-  size = 3960
+  size = 7920
   isKeyFrame = true
   presentationTimeUs = 1573786
-sample:
-  trackIndex = 1
-  dataHashCode = 571187457
-  size = 3960
-  isKeyFrame = true
-  presentationTimeUs = 1596235
 sample:
   trackIndex = 1
   dataHashCode = -448902783
@@ -1692,16 +1668,10 @@ sample:
   presentationTimeUs = 1780793
 sample:
   trackIndex = 1
-  dataHashCode = 571187457
+  dataHashCode = 2136490497
-  size = 3960
+  size = 7920
   isKeyFrame = true
   presentationTimeUs = 1805736
-sample:
-  trackIndex = 1
-  dataHashCode = 571187457
-  size = 3960
-  isKeyFrame = true
-  presentationTimeUs = 1828185
 sample:
   trackIndex = 1
   dataHashCode = -122903935
@@ -1746,16 +1716,16 @@ sample:
   presentationTimeUs = 1970340
 sample:
   trackIndex = 1
-  dataHashCode = 1940582145
+  dataHashCode = 693101697
-  size = 3080
+  size = 28
   isKeyFrame = true
   presentationTimeUs = 1999841
 sample:
   trackIndex = 1
-  dataHashCode = 571187457
+  dataHashCode = 243395457
-  size = 3960
+  size = 7012
   isKeyFrame = true
-  presentationTimeUs = 2017301
+  presentationTimeUs = 2000000
 sample:
   trackIndex = 1
   dataHashCode = 571187457
@@ -1872,16 +1842,16 @@ sample:
   presentationTimeUs = 2458752
 sample:
   trackIndex = 1
-  dataHashCode = 571187457
+  dataHashCode = -1476683391
-  size = 3960
+  size = 3316
   isKeyFrame = true
   presentationTimeUs = 2481201
 sample:
   trackIndex = 1
-  dataHashCode = -1264223743
+  dataHashCode = -1993784959
-  size = 4400
+  size = 5044
   isKeyFrame = true
-  presentationTimeUs = 2503650
+  presentationTimeUs = 2500000
 sample:
   trackIndex = 1
   dataHashCode = 571187457
@@ -1938,16 +1908,10 @@ sample:
   presentationTimeUs = 2713151
 sample:
   trackIndex = 1
-  dataHashCode = -1264223743
+  dataHashCode = 644553473
-  size = 4400
+  size = 8360
   isKeyFrame = true
   presentationTimeUs = 2735600
-sample:
-  trackIndex = 1
-  dataHashCode = 571187457
-  size = 3960
-  isKeyFrame = true
-  presentationTimeUs = 2760544
 sample:
   trackIndex = 1
   dataHashCode = 571187457
@@ -2004,16 +1968,16 @@ sample:
   presentationTimeUs = 2967551
 sample:
   trackIndex = 1
-  dataHashCode = 571187457
+  dataHashCode = 2055611009
-  size = 3960
+  size = 1324
   isKeyFrame = true
   presentationTimeUs = 2992494
 sample:
   trackIndex = 1
-  dataHashCode = 571187457
+  dataHashCode = -76324991
-  size = 3960
+  size = 6596
   isKeyFrame = true
-  presentationTimeUs = 3014943
+  presentationTimeUs = 3000000
 sample:
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   dataHashCode = -1264223743
@@ -2040,16 +2004,10 @@ sample:
   presentationTimeUs = 3107233
 sample:
   trackIndex = 1
-  dataHashCode = 571187457
+  dataHashCode = 2136490497
-  size = 3960
+  size = 7920
   isKeyFrame = true
   presentationTimeUs = 3132154
-sample:
-  trackIndex = 1
-  dataHashCode = 571187457
-  size = 3960
-  isKeyFrame = true
-  presentationTimeUs = 3154603
 sample:
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   dataHashCode = -1264223743
@@ -2088,16 +2046,10 @@ sample:
   presentationTimeUs = 3294285
 sample:
   trackIndex = 1
-  dataHashCode = 571187457
+  dataHashCode = 644553473
-  size = 3960
+  size = 8360
   isKeyFrame = true
   presentationTimeUs = 3316734
-sample:
-  trackIndex = 1
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-  size = 4400
-  isKeyFrame = true
-  presentationTimeUs = 3339183
 sample:
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@@ -2130,16 +2082,16 @@ sample:
   presentationTimeUs = 3456394
 sample:
   trackIndex = 1
-  dataHashCode = -1264223743
+  dataHashCode = 1120019841
-  size = 4400
+  size = 3732
   isKeyFrame = true
   presentationTimeUs = 3478843
 sample:
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+  dataHashCode = 454210945
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+  size = 4628
   isKeyFrame = true
-  presentationTimeUs = 3503786
+  presentationTimeUs = 3500000
 sample:
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@@ -2154,16 +2106,10 @@ sample:
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 sample:
   trackIndex = 1
-  dataHashCode = 571187457
+  dataHashCode = 2136490497
-  size = 3960
+  size = 7920
   isKeyFrame = true
   presentationTimeUs = 3573628
-sample:
-  trackIndex = 1
-  dataHashCode = 571187457
-  size = 3960
-  isKeyFrame = true
-  presentationTimeUs = 3596077
 sample:
   trackIndex = 1
   dataHashCode = -448902783
@@ -2196,16 +2142,10 @@ sample:
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 sample:
   trackIndex = 1
-  dataHashCode = 571187457
+  dataHashCode = 2136490497
-  size = 3960
+  size = 7920
   isKeyFrame = true
   presentationTimeUs = 3735736
-sample:
-  trackIndex = 1
-  dataHashCode = 571187457
-  size = 3960
-  isKeyFrame = true
-  presentationTimeUs = 3758185
 sample:
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   dataHashCode = -1264223743
@@ -2244,16 +2184,10 @@ sample:
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 sample:
   trackIndex = 1
-  dataHashCode = 571187457
+  dataHashCode = 644553473
-  size = 3960
+  size = 8360
   isKeyFrame = true
   presentationTimeUs = 3920294
-sample:
-  trackIndex = 1
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-  size = 4400
-  isKeyFrame = true
-  presentationTimeUs = 3942743
 sample:
   trackIndex = 1
   dataHashCode = -1759454975

libraries/test_data/src/test/assets/transformerdumps/mp4/sowt-with-video.mov.silence_then_audio.dump

@@ -1350,16 +1350,16 @@ sample:
   presentationTimeUs = 464399
 sample:
   trackIndex = 1
-  dataHashCode = 1742602241
+  dataHashCode = 1728208641
-  size = 4096
+  size = 2184
   isKeyFrame = true
   presentationTimeUs = 487619
 sample:
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-  dataHashCode = 1742602241
+  dataHashCode = 620404993
-  size = 4096
+  size = 6008
   isKeyFrame = true
-  presentationTimeUs = 510839
+  presentationTimeUs = 500000
 sample:
   trackIndex = 1
   dataHashCode = 1742602241
@@ -1428,16 +1428,10 @@ sample:
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 sample:
   trackIndex = 1
-  dataHashCode = 1742602241
+  dataHashCode = -809762815
-  size = 4096
+  size = 8192
   isKeyFrame = true
   presentationTimeUs = 789478
-sample:
-  trackIndex = 1
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-  size = 4096
-  isKeyFrame = true
-  presentationTimeUs = 812698
 sample:
   trackIndex = 1
   dataHashCode = 1742602241
@@ -1482,16 +1476,16 @@ sample:
   presentationTimeUs = 975238
 sample:
   trackIndex = 1
-  dataHashCode = 1742602241
+  dataHashCode = 1097317889
-  size = 4096
+  size = 272
   isKeyFrame = true
   presentationTimeUs = 998458
 sample:
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-  dataHashCode = 1742602241
+  dataHashCode = 2136490497
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+  size = 7920
   isKeyFrame = true
-  presentationTimeUs = 1021678
+  presentationTimeUs = 1000000
 sample:
   trackIndex = 1
   dataHashCode = 1742602241
@@ -1530,16 +1524,10 @@ sample:
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 sample:
   trackIndex = 1
-  dataHashCode = 1742602241
+  dataHashCode = -809762815
-  size = 4096
+  size = 8192
   isKeyFrame = true
   presentationTimeUs = 1184217
-sample:
-  trackIndex = 1
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-  size = 4096
-  isKeyFrame = true
-  presentationTimeUs = 1207437
 sample:
   trackIndex = 1
   dataHashCode = 1742602241
@@ -1590,16 +1578,10 @@ sample:
   presentationTimeUs = 1393197
 sample:
   trackIndex = 1
-  dataHashCode = 1742602241
+  dataHashCode = -809762815
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+  size = 8192
   isKeyFrame = true
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-sample:
-  trackIndex = 1
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-  size = 4096
-  isKeyFrame = true
-  presentationTimeUs = 1439637
 sample:
   trackIndex = 1
   dataHashCode = 1742602241
@@ -1608,16 +1590,16 @@ sample:
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 sample:
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-  dataHashCode = 1742602241
+  dataHashCode = -1544807167
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+  size = 2456
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 sample:
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   isKeyFrame = true
-  presentationTimeUs = 1509297
+  presentationTimeUs = 1500000
 sample:
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   dataHashCode = 1742602241
@@ -1632,16 +1614,10 @@ sample:
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 sample:
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-  dataHashCode = 1742602241
+  dataHashCode = -809762815
-  size = 4096
+  size = 8192
   isKeyFrame = true
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-sample:
-  trackIndex = 1
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-  size = 4096
-  isKeyFrame = true
-  presentationTimeUs = 1602176
 sample:
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   dataHashCode = 1742602241
@@ -1692,16 +1668,10 @@ sample:
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 sample:
   trackIndex = 1
-  dataHashCode = 1742602241
+  dataHashCode = -809762815
-  size = 4096
+  size = 8192
   isKeyFrame = true
   presentationTimeUs = 1811156
-sample:
-  trackIndex = 1
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-  size = 4096
-  isKeyFrame = true
-  presentationTimeUs = 1834376
 sample:
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   dataHashCode = 1742602241
@@ -1734,16 +1704,10 @@ sample:
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 sample:
   trackIndex = 1
-  dataHashCode = 1742602241
+  dataHashCode = -474907647
-  size = 4096
+  size = 4640
   isKeyFrame = true
   presentationTimeUs = 1973696
-sample:
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-  size = 544
-  isKeyFrame = true
-  presentationTimeUs = 1996916
 sample:
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   dataHashCode = 838148193
@@ -1884,16 +1848,16 @@ sample:
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 sample:
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-  dataHashCode = -356476264
+  dataHashCode = 1775616337
-  size = 3760
+  size = 3528
   isKeyFrame = true
   presentationTimeUs = 2480000
 sample:
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+  dataHashCode = 931216668
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+  size = 3996
   isKeyFrame = true
-  presentationTimeUs = 2501315
+  presentationTimeUs = 2500000
 sample:
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   dataHashCode = 16108289
@@ -2028,16 +1992,16 @@ sample:
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 sample:
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-  dataHashCode = -1130552658
+  dataHashCode = 1297632614
-  size = 3764
+  size = 3296
   isKeyFrame = true
   presentationTimeUs = 2981315
 sample:
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+  dataHashCode = -1698066806
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+  size = 4232
   isKeyFrame = true
-  presentationTimeUs = 3002653
+  presentationTimeUs = 3000000
 sample:
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   dataHashCode = 1930678601
@@ -2172,16 +2136,16 @@ sample:
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 sample:
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-  dataHashCode = -884616159
+  dataHashCode = 624992026
-  size = 3764
+  size = 3060
   isKeyFrame = true
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 sample:
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+  size = 4468
   isKeyFrame = true
-  presentationTimeUs = 3503990
+  presentationTimeUs = 3500000
 sample:
   trackIndex = 1
   dataHashCode = 1234475840

libraries/test_data/src/test/assets/transformerdumps/mp4/sowt-with-video.mov.silence_then_audio_with_effects.dump

@@ -1350,16 +1350,16 @@ sample:
   presentationTimeUs = 458911
 sample:
   trackIndex = 1
-  dataHashCode = 571187457
+  dataHashCode = 836580609
-  size = 3960
+  size = 3288
   isKeyFrame = true
   presentationTimeUs = 481360
 sample:
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+  dataHashCode = -1141905919
-  size = 4400
+  size = 5072
   isKeyFrame = true
-  presentationTimeUs = 503809
+  presentationTimeUs = 500000
 sample:
   trackIndex = 1
   dataHashCode = 571187457
@@ -1428,16 +1428,10 @@ sample:
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 sample:
   trackIndex = 1
-  dataHashCode = 571187457
+  dataHashCode = 644553473
-  size = 3960
+  size = 8360
   isKeyFrame = true
   presentationTimeUs = 783151
-sample:
-  trackIndex = 1
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-  size = 4400
-  isKeyFrame = true
-  presentationTimeUs = 805600
 sample:
   trackIndex = 1
   dataHashCode = 571187457
@@ -1482,16 +1476,16 @@ sample:
   presentationTimeUs = 967709
 sample:
   trackIndex = 1
-  dataHashCode = 571187457
+  dataHashCode = 744439297
-  size = 3960
+  size = 1296
   isKeyFrame = true
   presentationTimeUs = 992653
 sample:
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-  dataHashCode = 571187457
+  dataHashCode = -1744763903
-  size = 3960
+  size = 6624
   isKeyFrame = true
-  presentationTimeUs = 1015102
+  presentationTimeUs = 1000000
 sample:
   trackIndex = 1
   dataHashCode = -1264223743
@@ -1530,16 +1524,10 @@ sample:
   presentationTimeUs = 1154761
 sample:
   trackIndex = 1
-  dataHashCode = -1264223743
+  dataHashCode = 644553473
-  size = 4400
+  size = 8360
   isKeyFrame = true
   presentationTimeUs = 1177210
-sample:
-  trackIndex = 1
-  dataHashCode = 571187457
-  size = 3960
-  isKeyFrame = true
-  presentationTimeUs = 1202154
 sample:
   trackIndex = 1
   dataHashCode = 571187457
@@ -1590,16 +1578,10 @@ sample:
   presentationTimeUs = 1386712
 sample:
   trackIndex = 1
-  dataHashCode = -1264223743
+  dataHashCode = 644553473
-  size = 4400
+  size = 8360
   isKeyFrame = true
   presentationTimeUs = 1409160
-sample:
-  trackIndex = 1
-  dataHashCode = 571187457
-  size = 3960
-  isKeyFrame = true
-  presentationTimeUs = 1434104
 sample:
   trackIndex = 1
   dataHashCode = 571187457
@@ -1608,16 +1590,16 @@ sample:
   presentationTimeUs = 1456553
 sample:
   trackIndex = 1
-  dataHashCode = -1264223743
+  dataHashCode = -206716671
-  size = 4400
+  size = 3704
   isKeyFrame = true
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 sample:
   trackIndex = 1
-  dataHashCode = 571187457
+  dataHashCode = -102540799
-  size = 3960
+  size = 4656
   isKeyFrame = true
-  presentationTimeUs = 1503945
+  presentationTimeUs = 1500000
 sample:
   trackIndex = 1
   dataHashCode = 571187457
@@ -1632,16 +1614,10 @@ sample:
   presentationTimeUs = 1548843
 sample:
   trackIndex = 1
-  dataHashCode = 571187457
+  dataHashCode = 2136490497
-  size = 3960
+  size = 7920
   isKeyFrame = true
   presentationTimeUs = 1573786
-sample:
-  trackIndex = 1
-  dataHashCode = 571187457
-  size = 3960
-  isKeyFrame = true
-  presentationTimeUs = 1596235
 sample:
   trackIndex = 1
   dataHashCode = -448902783
@@ -1692,16 +1668,10 @@ sample:
   presentationTimeUs = 1780793
 sample:
   trackIndex = 1
-  dataHashCode = 571187457
+  dataHashCode = 2136490497
-  size = 3960
+  size = 7920
   isKeyFrame = true
   presentationTimeUs = 1805736
-sample:
-  trackIndex = 1
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-  size = 3960
-  isKeyFrame = true
-  presentationTimeUs = 1828185
 sample:
   trackIndex = 1
   dataHashCode = -122903935
@@ -1746,16 +1716,16 @@ sample:
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 sample:
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-  dataHashCode = -1729993902
+  dataHashCode = -752508258
-  size = 2592
+  size = 28
   isKeyFrame = true
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 sample:
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+  size = 5976
   isKeyFrame = true
-  presentationTimeUs = 2014535
+  presentationTimeUs = 2000000
 sample:
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@@ -1890,16 +1860,16 @@ sample:
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 sample:
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-  dataHashCode = 471755676
+  dataHashCode = -607505416
-  size = 5052
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 sample:
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+  dataHashCode = 1452244565
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   isKeyFrame = true
-  presentationTimeUs = 2522879
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 sample:
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@@ -2034,10 +2004,16 @@ sample:
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 sample:
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-  dataHashCode = 1265834707
+  dataHashCode = 1336560411
-  size = 3628
+  size = 872
   isKeyFrame = true
   presentationTimeUs = 2995056
+sample:
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+  isKeyFrame = true
+  presentationTimeUs = 3000000
 sample:
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@@ -2178,16 +2154,16 @@ sample:
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 sample:
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-  dataHashCode = 1365512037
+  dataHashCode = -474273643
-  size = 3868
+  size = 948
   isKeyFrame = true
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 sample:
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   isKeyFrame = true
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 sample:
   trackIndex = 1
   dataHashCode = 829064633

libraries/test_data/src/test/assets/transformerdumps/mp4/sowt-with-video.mov.silence_then_silence-effects.dump

@@ -1350,16 +1350,16 @@ sample:
   presentationTimeUs = 458911
 sample:
   trackIndex = 1
-  dataHashCode = 571187457
+  dataHashCode = 836580609
-  size = 3960
+  size = 3288
   isKeyFrame = true
   presentationTimeUs = 481360
 sample:
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-  dataHashCode = -1264223743
+  dataHashCode = -1141905919
-  size = 4400
+  size = 5072
   isKeyFrame = true
-  presentationTimeUs = 503809
+  presentationTimeUs = 500000
 sample:
   trackIndex = 1
   dataHashCode = 571187457
@@ -1428,16 +1428,10 @@ sample:
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 sample:
   trackIndex = 1
-  dataHashCode = 571187457
+  dataHashCode = 644553473
-  size = 3960
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   isKeyFrame = true
   presentationTimeUs = 783151
-sample:
-  trackIndex = 1
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-  size = 4400
-  isKeyFrame = true
-  presentationTimeUs = 805600
 sample:
   trackIndex = 1
   dataHashCode = 571187457
@@ -1482,16 +1476,16 @@ sample:
   presentationTimeUs = 967709
 sample:
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-  dataHashCode = 571187457
+  dataHashCode = 744439297
-  size = 3960
+  size = 1296
   isKeyFrame = true
   presentationTimeUs = 992653
 sample:
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-  dataHashCode = 571187457
+  dataHashCode = -1744763903
-  size = 3960
+  size = 6624
   isKeyFrame = true
-  presentationTimeUs = 1015102
+  presentationTimeUs = 1000000
 sample:
   trackIndex = 1
   dataHashCode = -1264223743
@@ -1530,16 +1524,10 @@ sample:
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 sample:
   trackIndex = 1
-  dataHashCode = -1264223743
+  dataHashCode = 644553473
-  size = 4400
+  size = 8360
   isKeyFrame = true
   presentationTimeUs = 1177210
-sample:
-  trackIndex = 1
-  dataHashCode = 571187457
-  size = 3960
-  isKeyFrame = true
-  presentationTimeUs = 1202154
 sample:
   trackIndex = 1
   dataHashCode = 571187457
@@ -1590,16 +1578,10 @@ sample:
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 sample:
   trackIndex = 1
-  dataHashCode = -1264223743
+  dataHashCode = 644553473
-  size = 4400
+  size = 8360
   isKeyFrame = true
   presentationTimeUs = 1409160
-sample:
-  trackIndex = 1
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-  size = 3960
-  isKeyFrame = true
-  presentationTimeUs = 1434104
 sample:
   trackIndex = 1
   dataHashCode = 571187457
@@ -1608,16 +1590,16 @@ sample:
   presentationTimeUs = 1456553
 sample:
   trackIndex = 1
-  dataHashCode = -1264223743
+  dataHashCode = -206716671
-  size = 4400
+  size = 3704
   isKeyFrame = true
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 sample:
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-  dataHashCode = 571187457
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-  size = 3960
+  size = 4656
   isKeyFrame = true
-  presentationTimeUs = 1503945
+  presentationTimeUs = 1500000
 sample:
   trackIndex = 1
   dataHashCode = 571187457
@@ -1632,16 +1614,10 @@ sample:
   presentationTimeUs = 1548843
 sample:
   trackIndex = 1
-  dataHashCode = 571187457
+  dataHashCode = 2136490497
-  size = 3960
+  size = 7920
   isKeyFrame = true
   presentationTimeUs = 1573786
-sample:
-  trackIndex = 1
-  dataHashCode = 571187457
-  size = 3960
-  isKeyFrame = true
-  presentationTimeUs = 1596235
 sample:
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   dataHashCode = -448902783
@@ -1692,16 +1668,10 @@ sample:
   presentationTimeUs = 1780793
 sample:
   trackIndex = 1
-  dataHashCode = 571187457
+  dataHashCode = 2136490497
-  size = 3960
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   isKeyFrame = true
   presentationTimeUs = 1805736
-sample:
-  trackIndex = 1
-  dataHashCode = 571187457
-  size = 3960
-  isKeyFrame = true
-  presentationTimeUs = 1828185
 sample:
   trackIndex = 1
   dataHashCode = -122903935
@@ -1746,16 +1716,16 @@ sample:
   presentationTimeUs = 1970340
 sample:
   trackIndex = 1
-  dataHashCode = 1940582145
+  dataHashCode = 693101697
-  size = 3080
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   isKeyFrame = true
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 sample:
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-  dataHashCode = 571187457
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   isKeyFrame = true
-  presentationTimeUs = 2017301
+  presentationTimeUs = 2000000
 sample:
   trackIndex = 1
   dataHashCode = 571187457
@@ -1872,16 +1842,16 @@ sample:
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 sample:
   trackIndex = 1
-  dataHashCode = 571187457
+  dataHashCode = -1476683391
-  size = 3960
+  size = 3316
   isKeyFrame = true
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 sample:
   trackIndex = 1
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+  dataHashCode = -1993784959
-  size = 4400
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   isKeyFrame = true
-  presentationTimeUs = 2503650
+  presentationTimeUs = 2500000
 sample:
   trackIndex = 1
   dataHashCode = 571187457
@@ -1938,16 +1908,10 @@ sample:
   presentationTimeUs = 2713151
 sample:
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-  dataHashCode = -1264223743
+  dataHashCode = 644553473
-  size = 4400
+  size = 8360
   isKeyFrame = true
   presentationTimeUs = 2735600
-sample:
-  trackIndex = 1
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-  size = 3960
-  isKeyFrame = true
-  presentationTimeUs = 2760544
 sample:
   trackIndex = 1
   dataHashCode = 571187457
@@ -2004,16 +1968,16 @@ sample:
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 sample:
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-  dataHashCode = 571187457
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-  size = 3960
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   isKeyFrame = true
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 sample:
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   isKeyFrame = true
-  presentationTimeUs = 3014943
+  presentationTimeUs = 3000000
 sample:
   trackIndex = 1
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@@ -2040,16 +2004,10 @@ sample:
   presentationTimeUs = 3107233
 sample:
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-  dataHashCode = 571187457
+  dataHashCode = 2136490497
-  size = 3960
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-sample:
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-  size = 3960
-  isKeyFrame = true
-  presentationTimeUs = 3154603
 sample:
   trackIndex = 1
   dataHashCode = -1264223743
@@ -2088,16 +2046,10 @@ sample:
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 sample:
   trackIndex = 1
-  dataHashCode = 571187457
+  dataHashCode = 644553473
-  size = 3960
+  size = 8360
   isKeyFrame = true
   presentationTimeUs = 3316734
-sample:
-  trackIndex = 1
-  dataHashCode = -1264223743
-  size = 4400
-  isKeyFrame = true
-  presentationTimeUs = 3339183
 sample:
   trackIndex = 1
   dataHashCode = -448902783
@@ -2130,16 +2082,16 @@ sample:
   presentationTimeUs = 3456394
 sample:
   trackIndex = 1
-  dataHashCode = -1264223743
+  dataHashCode = 1120019841
-  size = 4400
+  size = 3732
   isKeyFrame = true
   presentationTimeUs = 3478843
 sample:
   trackIndex = 1
-  dataHashCode = 571187457
+  dataHashCode = 454210945
-  size = 3960
+  size = 4628
   isKeyFrame = true
-  presentationTimeUs = 3503786
+  presentationTimeUs = 3500000
 sample:
   trackIndex = 1
   dataHashCode = 571187457
@@ -2154,16 +2106,10 @@ sample:
   presentationTimeUs = 3548684
 sample:
   trackIndex = 1
-  dataHashCode = 571187457
+  dataHashCode = 2136490497
-  size = 3960
+  size = 7920
   isKeyFrame = true
   presentationTimeUs = 3573628
-sample:
-  trackIndex = 1
-  dataHashCode = 571187457
-  size = 3960
-  isKeyFrame = true
-  presentationTimeUs = 3596077
 sample:
   trackIndex = 1
   dataHashCode = -448902783
@@ -2196,16 +2142,10 @@ sample:
   presentationTimeUs = 3710793
 sample:
   trackIndex = 1
-  dataHashCode = 571187457
+  dataHashCode = 2136490497
-  size = 3960
+  size = 7920
   isKeyFrame = true
   presentationTimeUs = 3735736
-sample:
-  trackIndex = 1
-  dataHashCode = 571187457
-  size = 3960
-  isKeyFrame = true
-  presentationTimeUs = 3758185
 sample:
   trackIndex = 1
   dataHashCode = -1264223743
@@ -2244,16 +2184,10 @@ sample:
   presentationTimeUs = 3897845
 sample:
   trackIndex = 1
-  dataHashCode = 571187457
+  dataHashCode = 644553473
-  size = 3960
+  size = 8360
   isKeyFrame = true
   presentationTimeUs = 3920294
-sample:
-  trackIndex = 1
-  dataHashCode = -1264223743
-  size = 4400
-  isKeyFrame = true
-  presentationTimeUs = 3942743
 sample:
   trackIndex = 1
   dataHashCode = -1759454975

libraries/test_data/src/test/assets/transformerdumps/mp4/sowt-with-video.mov.silence_then_silence.dump

@@ -1350,16 +1350,16 @@ sample:
   presentationTimeUs = 464399
 sample:
   trackIndex = 1
-  dataHashCode = 1742602241
+  dataHashCode = 1728208641
-  size = 4096
+  size = 2184
   isKeyFrame = true
   presentationTimeUs = 487619
 sample:
   trackIndex = 1
-  dataHashCode = 1742602241
+  dataHashCode = 620404993
-  size = 4096
+  size = 6008
   isKeyFrame = true
-  presentationTimeUs = 510839
+  presentationTimeUs = 500000
 sample:
   trackIndex = 1
   dataHashCode = 1742602241
@@ -1428,16 +1428,10 @@ sample:
   presentationTimeUs = 766258
 sample:
   trackIndex = 1
-  dataHashCode = 1742602241
+  dataHashCode = -809762815
-  size = 4096
+  size = 8192
   isKeyFrame = true
   presentationTimeUs = 789478
-sample:
-  trackIndex = 1
-  dataHashCode = 1742602241
-  size = 4096
-  isKeyFrame = true
-  presentationTimeUs = 812698
 sample:
   trackIndex = 1
   dataHashCode = 1742602241
@@ -1482,16 +1476,16 @@ sample:
   presentationTimeUs = 975238
 sample:
   trackIndex = 1
-  dataHashCode = 1742602241
+  dataHashCode = 1097317889
-  size = 4096
+  size = 272
   isKeyFrame = true
   presentationTimeUs = 998458
 sample:
   trackIndex = 1
-  dataHashCode = 1742602241
+  dataHashCode = 2136490497
-  size = 4096
+  size = 7920
   isKeyFrame = true
-  presentationTimeUs = 1021678
+  presentationTimeUs = 1000000
 sample:
   trackIndex = 1
   dataHashCode = 1742602241
@@ -1530,16 +1524,10 @@ sample:
   presentationTimeUs = 1160997
 sample:
   trackIndex = 1
-  dataHashCode = 1742602241
+  dataHashCode = -809762815
-  size = 4096
+  size = 8192
   isKeyFrame = true
   presentationTimeUs = 1184217
-sample:
-  trackIndex = 1
-  dataHashCode = 1742602241
-  size = 4096
-  isKeyFrame = true
-  presentationTimeUs = 1207437
 sample:
   trackIndex = 1
   dataHashCode = 1742602241
@@ -1590,16 +1578,10 @@ sample:
   presentationTimeUs = 1393197
 sample:
   trackIndex = 1
-  dataHashCode = 1742602241
+  dataHashCode = -809762815
-  size = 4096
+  size = 8192
   isKeyFrame = true
   presentationTimeUs = 1416417
-sample:
-  trackIndex = 1
-  dataHashCode = 1742602241
-  size = 4096
-  isKeyFrame = true
-  presentationTimeUs = 1439637
 sample:
   trackIndex = 1
   dataHashCode = 1742602241
@@ -1608,16 +1590,16 @@ sample:
   presentationTimeUs = 1462857
 sample:
   trackIndex = 1
-  dataHashCode = 1742602241
+  dataHashCode = -1544807167
-  size = 4096
+  size = 2456
   isKeyFrame = true
   presentationTimeUs = 1486077
 sample:
   trackIndex = 1
-  dataHashCode = 1742602241
+  dataHashCode = 370729729
-  size = 4096
+  size = 5736
   isKeyFrame = true
-  presentationTimeUs = 1509297
+  presentationTimeUs = 1500000
 sample:
   trackIndex = 1
   dataHashCode = 1742602241
@@ -1632,16 +1614,10 @@ sample:
   presentationTimeUs = 1555736
 sample:
   trackIndex = 1
-  dataHashCode = 1742602241
+  dataHashCode = -809762815
-  size = 4096
+  size = 8192
   isKeyFrame = true
   presentationTimeUs = 1578956
-sample:
-  trackIndex = 1
-  dataHashCode = 1742602241
-  size = 4096
-  isKeyFrame = true
-  presentationTimeUs = 1602176
 sample:
   trackIndex = 1
   dataHashCode = 1742602241
@@ -1692,16 +1668,10 @@ sample:
   presentationTimeUs = 1787936
 sample:
   trackIndex = 1
-  dataHashCode = 1742602241
+  dataHashCode = -809762815
-  size = 4096
+  size = 8192
   isKeyFrame = true
   presentationTimeUs = 1811156
-sample:
-  trackIndex = 1
-  dataHashCode = 1742602241
-  size = 4096
-  isKeyFrame = true
-  presentationTimeUs = 1834376
 sample:
   trackIndex = 1
   dataHashCode = 1742602241
@@ -1734,16 +1704,10 @@ sample:
   presentationTimeUs = 1950476
 sample:
   trackIndex = 1
-  dataHashCode = 1742602241
+  dataHashCode = -474907647
-  size = 4096
+  size = 4640
   isKeyFrame = true
   presentationTimeUs = 1973696
-sample:
-  trackIndex = 1
-  dataHashCode = -204243967
-  size = 544
-  isKeyFrame = true
-  presentationTimeUs = 1996916
 sample:
   trackIndex = 1
   dataHashCode = 1742602241
@@ -1872,16 +1836,16 @@ sample:
   presentationTimeUs = 2464399
 sample:
   trackIndex = 1
-  dataHashCode = 1742602241
+  dataHashCode = 1728208641
-  size = 4096
+  size = 2184
   isKeyFrame = true
   presentationTimeUs = 2487619
 sample:
   trackIndex = 1
-  dataHashCode = 1742602241
+  dataHashCode = 620404993
-  size = 4096
+  size = 6008
   isKeyFrame = true
-  presentationTimeUs = 2510839
+  presentationTimeUs = 2500000
 sample:
   trackIndex = 1
   dataHashCode = 1742602241
@@ -1938,16 +1902,10 @@ sample:
   presentationTimeUs = 2719818
 sample:
   trackIndex = 1
-  dataHashCode = 1742602241
+  dataHashCode = -809762815
-  size = 4096
+  size = 8192
   isKeyFrame = true
   presentationTimeUs = 2743038
-sample:
-  trackIndex = 1
-  dataHashCode = 1742602241
-  size = 4096
-  isKeyFrame = true
-  presentationTimeUs = 2766258
 sample:
   trackIndex = 1
   dataHashCode = 1742602241
@@ -2004,16 +1962,16 @@ sample:
   presentationTimeUs = 2975238
 sample:
   trackIndex = 1
-  dataHashCode = 1742602241
+  dataHashCode = 1097317889
-  size = 4096
+  size = 272
   isKeyFrame = true
   presentationTimeUs = 2998458
 sample:
   trackIndex = 1
-  dataHashCode = 1742602241
+  dataHashCode = 2136490497
-  size = 4096
+  size = 7920
   isKeyFrame = true
-  presentationTimeUs = 3021678
+  presentationTimeUs = 3000000
 sample:
   trackIndex = 1
   dataHashCode = 1742602241
@@ -2040,16 +1998,10 @@ sample:
   presentationTimeUs = 3114557
 sample:
   trackIndex = 1
-  dataHashCode = 1742602241
+  dataHashCode = -809762815
-  size = 4096
+  size = 8192
   isKeyFrame = true
   presentationTimeUs = 3137777
-sample:
-  trackIndex = 1
-  dataHashCode = 1742602241
-  size = 4096
-  isKeyFrame = true
-  presentationTimeUs = 3160997
 sample:
   trackIndex = 1
   dataHashCode = 1742602241
@@ -2088,16 +2040,10 @@ sample:
   presentationTimeUs = 3300317
 sample:
   trackIndex = 1
-  dataHashCode = 1742602241
+  dataHashCode = -809762815
-  size = 4096
+  size = 8192
   isKeyFrame = true
   presentationTimeUs = 3323537
-sample:
-  trackIndex = 1
-  dataHashCode = 1742602241
-  size = 4096
-  isKeyFrame = true
-  presentationTimeUs = 3346757
 sample:
   trackIndex = 1
   dataHashCode = 1742602241
@@ -2130,16 +2076,16 @@ sample:
   presentationTimeUs = 3462857
 sample:
   trackIndex = 1
-  dataHashCode = 1742602241
+  dataHashCode = -1544807167
-  size = 4096
+  size = 2456
   isKeyFrame = true
   presentationTimeUs = 3486077
 sample:
   trackIndex = 1
-  dataHashCode = 1742602241
+  dataHashCode = 370729729
-  size = 4096
+  size = 5736
   isKeyFrame = true
-  presentationTimeUs = 3509297
+  presentationTimeUs = 3500000
 sample:
   trackIndex = 1
   dataHashCode = 1742602241
@@ -2154,16 +2100,10 @@ sample:
   presentationTimeUs = 3555736
 sample:
   trackIndex = 1
-  dataHashCode = 1742602241
+  dataHashCode = -809762815
-  size = 4096
+  size = 8192
   isKeyFrame = true
   presentationTimeUs = 3578956
-sample:
-  trackIndex = 1
-  dataHashCode = 1742602241
-  size = 4096
-  isKeyFrame = true
-  presentationTimeUs = 3602176
 sample:
   trackIndex = 1
   dataHashCode = 1742602241
@@ -2196,16 +2136,10 @@ sample:
   presentationTimeUs = 3718276
 sample:
   trackIndex = 1
-  dataHashCode = 1742602241
+  dataHashCode = -809762815
-  size = 4096
+  size = 8192
   isKeyFrame = true
   presentationTimeUs = 3741496
-sample:
-  trackIndex = 1
-  dataHashCode = 1742602241
-  size = 4096
-  isKeyFrame = true
-  presentationTimeUs = 3764716
 sample:
   trackIndex = 1
   dataHashCode = 1742602241
@@ -2238,16 +2172,10 @@ sample:
   presentationTimeUs = 3880816
 sample:
   trackIndex = 1
-  dataHashCode = 1742602241
+  dataHashCode = -809762815
-  size = 4096
+  size = 8192
   isKeyFrame = true
   presentationTimeUs = 3904036
-sample:
-  trackIndex = 1
-  dataHashCode = 1742602241
-  size = 4096
-  isKeyFrame = true
-  presentationTimeUs = 3927256
 sample:
   trackIndex = 1
   dataHashCode = 1742602241

libraries/test_data/src/test/assets/transformerdumps/mp4/sowt-with-video.mov.silence_then_silence_with_effects.dump

@@ -1350,16 +1350,16 @@ sample:
   presentationTimeUs = 458911
 sample:
   trackIndex = 1
-  dataHashCode = 571187457
+  dataHashCode = 836580609
-  size = 3960
+  size = 3288
   isKeyFrame = true
   presentationTimeUs = 481360
 sample:
   trackIndex = 1
-  dataHashCode = -1264223743
+  dataHashCode = -1141905919
-  size = 4400
+  size = 5072
   isKeyFrame = true
-  presentationTimeUs = 503809
+  presentationTimeUs = 500000
 sample:
   trackIndex = 1
   dataHashCode = 571187457
@@ -1428,16 +1428,10 @@ sample:
   presentationTimeUs = 760702
 sample:
   trackIndex = 1
-  dataHashCode = 571187457
+  dataHashCode = 644553473
-  size = 3960
+  size = 8360
   isKeyFrame = true
   presentationTimeUs = 783151
-sample:
-  trackIndex = 1
-  dataHashCode = -1264223743
-  size = 4400
-  isKeyFrame = true
-  presentationTimeUs = 805600
 sample:
   trackIndex = 1
   dataHashCode = 571187457
@@ -1482,16 +1476,16 @@ sample:
   presentationTimeUs = 967709
 sample:
   trackIndex = 1
-  dataHashCode = 571187457
+  dataHashCode = 744439297
-  size = 3960
+  size = 1296
   isKeyFrame = true
   presentationTimeUs = 992653
 sample:
   trackIndex = 1
-  dataHashCode = 571187457
+  dataHashCode = -1744763903
-  size = 3960
+  size = 6624
   isKeyFrame = true
-  presentationTimeUs = 1015102
+  presentationTimeUs = 1000000
 sample:
   trackIndex = 1
   dataHashCode = -1264223743
@@ -1530,16 +1524,10 @@ sample:
   presentationTimeUs = 1154761
 sample:
   trackIndex = 1
-  dataHashCode = -1264223743
+  dataHashCode = 644553473
-  size = 4400
+  size = 8360
   isKeyFrame = true
   presentationTimeUs = 1177210
-sample:
-  trackIndex = 1
-  dataHashCode = 571187457
-  size = 3960
-  isKeyFrame = true
-  presentationTimeUs = 1202154
 sample:
   trackIndex = 1
   dataHashCode = 571187457
@@ -1590,16 +1578,10 @@ sample:
   presentationTimeUs = 1386712
 sample:
   trackIndex = 1
-  dataHashCode = -1264223743
+  dataHashCode = 644553473
-  size = 4400
+  size = 8360
   isKeyFrame = true
   presentationTimeUs = 1409160
-sample:
-  trackIndex = 1
-  dataHashCode = 571187457
-  size = 3960
-  isKeyFrame = true
-  presentationTimeUs = 1434104
 sample:
   trackIndex = 1
   dataHashCode = 571187457
@@ -1608,16 +1590,16 @@ sample:
   presentationTimeUs = 1456553
 sample:
   trackIndex = 1
-  dataHashCode = -1264223743
+  dataHashCode = -206716671
-  size = 4400
+  size = 3704
   isKeyFrame = true
   presentationTimeUs = 1479002
 sample:
   trackIndex = 1
-  dataHashCode = 571187457
+  dataHashCode = -102540799
-  size = 3960
+  size = 4656
   isKeyFrame = true
-  presentationTimeUs = 1503945
+  presentationTimeUs = 1500000
 sample:
   trackIndex = 1
   dataHashCode = 571187457
@@ -1632,16 +1614,10 @@ sample:
   presentationTimeUs = 1548843
 sample:
   trackIndex = 1
-  dataHashCode = 571187457
+  dataHashCode = 2136490497
-  size = 3960
+  size = 7920
   isKeyFrame = true
   presentationTimeUs = 1573786
-sample:
-  trackIndex = 1
-  dataHashCode = 571187457
-  size = 3960
-  isKeyFrame = true
-  presentationTimeUs = 1596235
 sample:
   trackIndex = 1
   dataHashCode = -448902783
@@ -1692,16 +1668,10 @@ sample:
   presentationTimeUs = 1780793
 sample:
   trackIndex = 1
-  dataHashCode = 571187457
+  dataHashCode = 2136490497
-  size = 3960
+  size = 7920
   isKeyFrame = true
   presentationTimeUs = 1805736
-sample:
-  trackIndex = 1
-  dataHashCode = 571187457
-  size = 3960
-  isKeyFrame = true
-  presentationTimeUs = 1828185
 sample:
   trackIndex = 1
   dataHashCode = -122903935
@@ -1746,16 +1716,16 @@ sample:
   presentationTimeUs = 1970340
 sample:
   trackIndex = 1
-  dataHashCode = 1940582145
+  dataHashCode = 693101697
-  size = 3080
+  size = 28
   isKeyFrame = true
   presentationTimeUs = 1999841
 sample:
   trackIndex = 1
-  dataHashCode = 571187457
+  dataHashCode = 243395457
-  size = 3960
+  size = 7012
   isKeyFrame = true
-  presentationTimeUs = 2017301
+  presentationTimeUs = 2000000
 sample:
   trackIndex = 1
   dataHashCode = 571187457
@@ -1872,16 +1842,16 @@ sample:
   presentationTimeUs = 2458752
 sample:
   trackIndex = 1
-  dataHashCode = 571187457
+  dataHashCode = -1476683391
-  size = 3960
+  size = 3316
   isKeyFrame = true
   presentationTimeUs = 2481201
 sample:
   trackIndex = 1
-  dataHashCode = -1264223743
+  dataHashCode = -1993784959
-  size = 4400
+  size = 5044
   isKeyFrame = true
-  presentationTimeUs = 2503650
+  presentationTimeUs = 2500000
 sample:
   trackIndex = 1
   dataHashCode = 571187457
@@ -1938,16 +1908,10 @@ sample:
   presentationTimeUs = 2713151
 sample:
   trackIndex = 1
-  dataHashCode = -1264223743
+  dataHashCode = 644553473
-  size = 4400
+  size = 8360
   isKeyFrame = true
   presentationTimeUs = 2735600
-sample:
-  trackIndex = 1
-  dataHashCode = 571187457
-  size = 3960
-  isKeyFrame = true
-  presentationTimeUs = 2760544
 sample:
   trackIndex = 1
   dataHashCode = 571187457
@@ -2004,16 +1968,16 @@ sample:
   presentationTimeUs = 2967551
 sample:
   trackIndex = 1
-  dataHashCode = 571187457
+  dataHashCode = 2055611009
-  size = 3960
+  size = 1324
   isKeyFrame = true
   presentationTimeUs = 2992494
 sample:
   trackIndex = 1
-  dataHashCode = 571187457
+  dataHashCode = -76324991
-  size = 3960
+  size = 6596
   isKeyFrame = true
-  presentationTimeUs = 3014943
+  presentationTimeUs = 3000000
 sample:
   trackIndex = 1
   dataHashCode = -1264223743
@@ -2040,16 +2004,10 @@ sample:
   presentationTimeUs = 3107233
 sample:
   trackIndex = 1
-  dataHashCode = 571187457
+  dataHashCode = 2136490497
-  size = 3960
+  size = 7920
   isKeyFrame = true
   presentationTimeUs = 3132154
-sample:
-  trackIndex = 1
-  dataHashCode = 571187457
-  size = 3960
-  isKeyFrame = true
-  presentationTimeUs = 3154603
 sample:
   trackIndex = 1
   dataHashCode = -1264223743
@@ -2088,16 +2046,10 @@ sample:
   presentationTimeUs = 3294285
 sample:
   trackIndex = 1
-  dataHashCode = 571187457
+  dataHashCode = 644553473
-  size = 3960
+  size = 8360
   isKeyFrame = true
   presentationTimeUs = 3316734
-sample:
-  trackIndex = 1
-  dataHashCode = -1264223743
-  size = 4400
-  isKeyFrame = true
-  presentationTimeUs = 3339183
 sample:
   trackIndex = 1
   dataHashCode = -448902783
@@ -2130,16 +2082,16 @@ sample:
   presentationTimeUs = 3456394
 sample:
   trackIndex = 1
-  dataHashCode = -1264223743
+  dataHashCode = 1120019841
-  size = 4400
+  size = 3732
   isKeyFrame = true
   presentationTimeUs = 3478843
 sample:
   trackIndex = 1
-  dataHashCode = 571187457
+  dataHashCode = 454210945
-  size = 3960
+  size = 4628
   isKeyFrame = true
-  presentationTimeUs = 3503786
+  presentationTimeUs = 3500000
 sample:
   trackIndex = 1
   dataHashCode = 571187457
@@ -2154,16 +2106,10 @@ sample:
   presentationTimeUs = 3548684
 sample:
   trackIndex = 1
-  dataHashCode = 571187457
+  dataHashCode = 2136490497
-  size = 3960
+  size = 7920
   isKeyFrame = true
   presentationTimeUs = 3573628
-sample:
-  trackIndex = 1
-  dataHashCode = 571187457
-  size = 3960
-  isKeyFrame = true
-  presentationTimeUs = 3596077
 sample:
   trackIndex = 1
   dataHashCode = -448902783
@@ -2196,16 +2142,10 @@ sample:
   presentationTimeUs = 3710793
 sample:
   trackIndex = 1
-  dataHashCode = 571187457
+  dataHashCode = 2136490497
-  size = 3960
+  size = 7920
   isKeyFrame = true
   presentationTimeUs = 3735736
-sample:
-  trackIndex = 1
-  dataHashCode = 571187457
-  size = 3960
-  isKeyFrame = true
-  presentationTimeUs = 3758185
 sample:
   trackIndex = 1
   dataHashCode = -1264223743
@@ -2244,16 +2184,10 @@ sample:
   presentationTimeUs = 3897845
 sample:
   trackIndex = 1
-  dataHashCode = 571187457
+  dataHashCode = 644553473
-  size = 3960
+  size = 8360
   isKeyFrame = true
   presentationTimeUs = 3920294
-sample:
-  trackIndex = 1
-  dataHashCode = -1264223743
-  size = 4400
-  isKeyFrame = true
-  presentationTimeUs = 3942743
 sample:
   trackIndex = 1
   dataHashCode = -1759454975

libraries/test_data/src/test/assets/transformerdumps/wav/sample.wav.concatenated_high_pitch.dump

@@ -36,16 +36,16 @@ sample:
   presentationTimeUs = 370748
 sample:
   trackIndex = 0
-  dataHashCode = 13583718
+  dataHashCode = -1241547797
-  size = 8968
+  size = 2192
   isKeyFrame = true
   presentationTimeUs = 475147
 sample:
   trackIndex = 0
-  dataHashCode = -1444602526
+  dataHashCode = -1607988131
-  size = 8588
+  size = 15364
   isKeyFrame = true
-  presentationTimeUs = 576825
+  presentationTimeUs = 500000
 sample:
   trackIndex = 0
   dataHashCode = -1693065958
@@ -72,16 +72,16 @@ sample:
   presentationTimeUs = 970680
 sample:
   trackIndex = 0
-  dataHashCode = 2042155098
+  dataHashCode = 887503681
-  size = 6482
+  size = 6
   isKeyFrame = true
   presentationTimeUs = 999931
 sample:
   trackIndex = 0
-  dataHashCode = 1417355469
+  dataHashCode = -1294750618
-  size = 8556
+  size = 15032
   isKeyFrame = true
-  presentationTimeUs = 1073424
+  presentationTimeUs = 1000000
 sample:
   trackIndex = 0
   dataHashCode = -2107697498
@@ -102,16 +102,16 @@ sample:
   presentationTimeUs = 1370680
 sample:
   trackIndex = 0
-  dataHashCode = 13583718
+  dataHashCode = 1453487712
-  size = 8968
+  size = 2198
   isKeyFrame = true
   presentationTimeUs = 1475079
 sample:
   trackIndex = 0
-  dataHashCode = -1444602526
+  dataHashCode = 209617192
-  size = 8588
+  size = 15358
   isKeyFrame = true
-  presentationTimeUs = 1576757
+  presentationTimeUs = 1500000
 sample:
   trackIndex = 0
   dataHashCode = -1693065958

libraries/test_data/src/test/assets/transformerdumps/wav/sample.wav.concurrent.dump

@@ -0,0 +1,67 @@
+format 0:
+  averageBitrate = 131072
+  sampleMimeType = audio/mp4a-latm
+  channelCount = 1
+  sampleRate = 44100
+  pcmEncoding = 2
+sample:
+  trackIndex = 0
+  dataHashCode = 1365664853
+  size = 8820
+  isKeyFrame = true
+  presentationTimeUs = 0
+sample:
+  trackIndex = 0
+  dataHashCode = -1466730976
+  size = 8820
+  isKeyFrame = true
+  presentationTimeUs = 100000
+sample:
+  trackIndex = 0
+  dataHashCode = 1178728837
+  size = 8820
+  isKeyFrame = true
+  presentationTimeUs = 200000
+sample:
+  trackIndex = 0
+  dataHashCode = -216459624
+  size = 8820
+  isKeyFrame = true
+  presentationTimeUs = 300000
+sample:
+  trackIndex = 0
+  dataHashCode = 1990341112
+  size = 8820
+  isKeyFrame = true
+  presentationTimeUs = 400000
+sample:
+  trackIndex = 0
+  dataHashCode = 1561236782
+  size = 8820
+  isKeyFrame = true
+  presentationTimeUs = 500000
+sample:
+  trackIndex = 0
+  dataHashCode = 1146352887
+  size = 8820
+  isKeyFrame = true
+  presentationTimeUs = 600000
+sample:
+  trackIndex = 0
+  dataHashCode = 1061204212
+  size = 8820
+  isKeyFrame = true
+  presentationTimeUs = 700000
+sample:
+  trackIndex = 0
+  dataHashCode = 840187559
+  size = 8820
+  isKeyFrame = true
+  presentationTimeUs = 800000
+sample:
+  trackIndex = 0
+  dataHashCode = -29240395
+  size = 8820
+  isKeyFrame = true
+  presentationTimeUs = 900000
+released = true

libraries/test_data/src/test/assets/transformerdumps/wav/sample.wav.high_pitch_then_low_pitch.dump

@@ -36,16 +36,16 @@ sample:
   presentationTimeUs = 370748
 sample:
   trackIndex = 0
-  dataHashCode = 13583718
+  dataHashCode = -1241547797
-  size = 8968
+  size = 2192
   isKeyFrame = true
   presentationTimeUs = 475147
 sample:
   trackIndex = 0
-  dataHashCode = -1444602526
+  dataHashCode = -1607988131
-  size = 8588
+  size = 15364
   isKeyFrame = true
-  presentationTimeUs = 576825
+  presentationTimeUs = 500000
 sample:
   trackIndex = 0
   dataHashCode = -1693065958
@@ -72,16 +72,16 @@ sample:
   presentationTimeUs = 970680
 sample:
   trackIndex = 0
-  dataHashCode = 2002762528
+  dataHashCode = 887503681
-  size = 6450
+  size = 6
   isKeyFrame = true
   presentationTimeUs = 999931
 sample:
   trackIndex = 0
-  dataHashCode = -657557348
+  dataHashCode = -1218473605
-  size = 9288
+  size = 15732
   isKeyFrame = true
-  presentationTimeUs = 1073061
+  presentationTimeUs = 1000000
 sample:
   trackIndex = 0
   dataHashCode = 1101737790
@@ -102,16 +102,16 @@ sample:
   presentationTimeUs = 1377981
 sample:
   trackIndex = 0
-  dataHashCode = -1146784158
+  dataHashCode = 403097819
-  size = 7898
+  size = 1586
   isKeyFrame = true
   presentationTimeUs = 1482018
 sample:
   trackIndex = 0
-  dataHashCode = -108739018
+  dataHashCode = 1889137981
-  size = 9244
+  size = 15556
   isKeyFrame = true
-  presentationTimeUs = 1571564
+  presentationTimeUs = 1500000
 sample:
   trackIndex = 0
   dataHashCode = 1527742727
@@ -132,8 +132,14 @@ sample:
   presentationTimeUs = 1869365
 sample:
   trackIndex = 0
-  dataHashCode = -2024887086
+  dataHashCode = -1794283843
-  size = 1312
+  size = 1310
   isKeyFrame = true
   presentationTimeUs = 1985147
+sample:
+  trackIndex = 0
+  dataHashCode = 1302
+  size = 2
+  isKeyFrame = true
+  presentationTimeUs = 2000000
 released = true

libraries/test_data/src/test/assets/transformerdumps/wav/sample_rf64.wav-high_pitch_then_sample.wav-high_pitch.dump

@@ -42,16 +42,16 @@ sample:
   presentationTimeUs = 348645
 sample:
   trackIndex = 0
-  dataHashCode = 591641755
+  dataHashCode = 554484641
-  size = 18624
+  size = 14952
   isKeyFrame = true
   presentationTimeUs = 422125
 sample:
   trackIndex = 0
-  dataHashCode = -909124577
+  dataHashCode = -1596995303
-  size = 19056
+  size = 22728
   isKeyFrame = true
-  presentationTimeUs = 519125
+  presentationTimeUs = 500000
 sample:
   trackIndex = 0
   dataHashCode = -1644849415
@@ -72,16 +72,16 @@ sample:
   presentationTimeUs = 823770
 sample:
   trackIndex = 0
-  dataHashCode = -1348998373
+  dataHashCode = 1994534499
-  size = 18696
+  size = 14312
   isKeyFrame = true
   presentationTimeUs = 925458
 sample:
   trackIndex = 0
-  dataHashCode = 1191266277
+  dataHashCode = -258879331
-  size = 19108
+  size = 23492
   isKeyFrame = true
-  presentationTimeUs = 1022833
+  presentationTimeUs = 1000000
 sample:
   trackIndex = 0
   dataHashCode = -1278785599

libraries/test_data/src/test/assets/transformerdumps/wav/sample_rf64.wav-high_pitch_then_sample.wav-low_pitch.dump

@@ -42,16 +42,16 @@ sample:
   presentationTimeUs = 348645
 sample:
   trackIndex = 0
-  dataHashCode = -555451391
+  dataHashCode = 804848209
-  size = 20216
+  size = 15020
   isKeyFrame = true
   presentationTimeUs = 421770
 sample:
   trackIndex = 0
-  dataHashCode = 1700905759
+  dataHashCode = -95210289
-  size = 17472
+  size = 22668
   isKeyFrame = true
-  presentationTimeUs = 527062
+  presentationTimeUs = 500000
 sample:
   trackIndex = 0
   dataHashCode = -416119019
@@ -72,16 +72,16 @@ sample:
   presentationTimeUs = 830729
 sample:
   trackIndex = 0
-  dataHashCode = 956501205
+  dataHashCode = 1298593295
-  size = 20124
+  size = 15308
   isKeyFrame = true
   presentationTimeUs = 920270
 sample:
   trackIndex = 0
-  dataHashCode = 299859135
+  dataHashCode = -1669619067
-  size = 18748
+  size = 23564
   isKeyFrame = true
-  presentationTimeUs = 1025083
+  presentationTimeUs = 1000000
 sample:
   trackIndex = 0
   dataHashCode = 636945085

libraries/test_data/src/test/assets/transformerdumps/wav/sample_rf64.wav_then_sample.wav.dump

@@ -36,16 +36,16 @@ sample:
   presentationTimeUs = 348625
 sample:
   trackIndex = 0
-  dataHashCode = -877978019
+  dataHashCode = -1794464029
-  size = 19200
+  size = 9868
   isKeyFrame = true
   presentationTimeUs = 448604
 sample:
   trackIndex = 0
-  dataHashCode = 903565693
+  dataHashCode = -328768009
-  size = 19200
+  size = 28532
   isKeyFrame = true
-  presentationTimeUs = 548604
+  presentationTimeUs = 500000
 sample:
   trackIndex = 0
   dataHashCode = -1424006305
@@ -66,16 +66,16 @@ sample:
   presentationTimeUs = 848604
 sample:
   trackIndex = 0
-  dataHashCode = -510424155
+  dataHashCode = -437038979
-  size = 19200
+  size = 9868
   isKeyFrame = true
   presentationTimeUs = 948604
 sample:
   trackIndex = 0
-  dataHashCode = 13706341
+  dataHashCode = 409224589
-  size = 19200
+  size = 28532
   isKeyFrame = true
-  presentationTimeUs = 1048604
+  presentationTimeUs = 1000000
 sample:
   trackIndex = 0
   dataHashCode = -1421600077

libraries/transformer/src/androidTest/java/androidx/media3/transformer/TransformerEndToEndTest.java

@@ -16,6 +16,7 @@
 package androidx.media3.transformer;
 
 import static androidx.media3.common.util.Assertions.checkNotNull;
+import static androidx.media3.transformer.AndroidTestUtil.JPG_ASSET_URI_STRING;
 import static androidx.media3.transformer.AndroidTestUtil.MP3_ASSET_URI_STRING;
 import static androidx.media3.transformer.AndroidTestUtil.MP4_ASSET_FORMAT;
 import static androidx.media3.transformer.AndroidTestUtil.MP4_ASSET_URI_STRING;
@@ -70,6 +71,81 @@ public class TransformerEndToEndTest {
   private final Context context = ApplicationProvider.getApplicationContext();
   private volatile @MonotonicNonNull TextureAssetLoader textureAssetLoader;
 
+  @Test
+  public void compositionEditing_withThreeSequences_completes() throws Exception {
+    String testId = "compositionEditing_withThreeSequences_completes";
+    Transformer transformer = new Transformer.Builder(context).build();
+    if (AndroidTestUtil.skipAndLogIfFormatsUnsupported(
+        context,
+        testId,
+        /* inputFormat= */ MP4_ASSET_FORMAT,
+        /* outputFormat= */ MP4_ASSET_FORMAT)) {
+      return;
+    }
+    EditedMediaItem audioVideoItem =
+        new EditedMediaItem.Builder(MediaItem.fromUri(MP4_ASSET_URI_STRING))
+            .setEffects(
+                new Effects(
+                    ImmutableList.of(createSonic(/* pitch= */ 2f)),
+                    ImmutableList.of(RgbFilter.createInvertedFilter())))
+            .build();
+    EditedMediaItem imageItem =
+        new EditedMediaItem.Builder(MediaItem.fromUri(JPG_ASSET_URI_STRING))
+            .setDurationUs(1_500_000)
+            .setFrameRate(30)
+            .build();
+
+    EditedMediaItemSequence audioVideoSequence =
+        new EditedMediaItemSequence(ImmutableList.of(audioVideoItem, imageItem, audioVideoItem));
+
+    EditedMediaItem.Builder audioBuilder =
+        new EditedMediaItem.Builder(MediaItem.fromUri(MP4_ASSET_URI_STRING)).setRemoveVideo(true);
+
+    EditedMediaItemSequence audioSequence =
+        new EditedMediaItemSequence(
+            ImmutableList.of(
+                audioBuilder
+                    .setEffects(
+                        new Effects(
+                            ImmutableList.of(createSonic(/* pitch= */ 1.3f)),
+                            /* videoEffects= */ ImmutableList.of()))
+                    .build(),
+                audioBuilder
+                    .setEffects(
+                        new Effects(
+                            ImmutableList.of(createSonic(/* pitch= */ 0.85f)),
+                            /* videoEffects= */ ImmutableList.of()))
+                    .build()));
+
+    EditedMediaItemSequence audioLoopingSequence =
+        new EditedMediaItemSequence(
+            ImmutableList.of(
+                audioBuilder
+                    .setEffects(
+                        new Effects(
+                            ImmutableList.of(createSonic(/* pitch= */ 0.4f)),
+                            /* videoEffects= */ ImmutableList.of()))
+                    .build()),
+            /* isLooping= */ true);
+
+    Composition composition =
+        new Composition.Builder(
+                ImmutableList.of(audioVideoSequence, audioSequence, audioLoopingSequence))
+            .build();
+
+    ExportTestResult result =
+        new TransformerAndroidTestRunner.Builder(context, transformer)
+            .build()
+            .run(testId, composition);
+
+    // MP4_ASSET duration is ~1s.
+    // Image asset duration is ~1.5s.
+    // audioVideoSequence duration: ~3.5s (3 inputs).
+    // audioSequence duration: ~2s (2 inputs).
+    // audioLoopingSequence: Matches max other sequence (~3.5s) -> 4 inputs of ~1s audio item.
+    assertThat(result.exportResult.processedInputs).hasSize(9);
+  }
+
   @Test
   public void videoEditing_withImageInput_completesWithCorrectFrameCountAndDuration()
       throws Exception {
@@ -403,7 +479,7 @@ public class TransformerEndToEndTest {
         /* outputFormat= */ MP4_ASSET_FORMAT)) {
       return;
     }
-    ImmutableList<AudioProcessor> audioProcessors = ImmutableList.of(new SonicAudioProcessor());
+    ImmutableList<AudioProcessor> audioProcessors = ImmutableList.of(createSonic(1.2f));
     ImmutableList<Effect> videoEffects = ImmutableList.of(RgbFilter.createGrayscaleFilter());
     MediaItem mediaItem = MediaItem.fromUri(Uri.parse(MP4_ASSET_URI_STRING));
     EditedMediaItem editedMediaItem =
@@ -613,4 +689,10 @@ public class TransformerEndToEndTest {
       return true;
     }
   }
+
+  private static AudioProcessor createSonic(float pitch) {
+    SonicAudioProcessor sonic = new SonicAudioProcessor();
+    sonic.setPitch(pitch);
+    return sonic;
+  }
 }

libraries/transformer/src/main/java/androidx/media3/transformer/AudioGraph.java

@@ -18,363 +18,112 @@ package androidx.media3.transformer;
 
 import static androidx.media3.common.audio.AudioProcessor.EMPTY_BUFFER;
 import static androidx.media3.common.util.Assertions.checkArgument;
-import static androidx.media3.common.util.Assertions.checkNotNull;
-import static androidx.media3.common.util.Assertions.checkState;
-import static androidx.media3.common.util.Assertions.checkStateNotNull;
-import static androidx.media3.decoder.DecoderInputBuffer.BUFFER_REPLACEMENT_MODE_DIRECT;
 
-import androidx.annotation.Nullable;
+import android.util.SparseArray;
 import androidx.media3.common.C;
 import androidx.media3.common.Format;
-import androidx.media3.common.MimeTypes;
-import androidx.media3.common.audio.AudioProcessingPipeline;
-import androidx.media3.common.audio.AudioProcessor;
 import androidx.media3.common.audio.AudioProcessor.AudioFormat;
 import androidx.media3.common.audio.AudioProcessor.UnhandledAudioFormatException;
-import androidx.media3.common.audio.ChannelMixingAudioProcessor;
-import androidx.media3.common.audio.ChannelMixingMatrix;
-import androidx.media3.common.audio.SonicAudioProcessor;
-import androidx.media3.common.audio.SpeedChangingAudioProcessor;
-import androidx.media3.common.util.NullableType;
-import androidx.media3.decoder.DecoderInputBuffer;
-import com.google.common.collect.ImmutableList;
 import java.nio.ByteBuffer;
-import java.nio.ByteOrder;
-import java.util.Queue;
-import java.util.concurrent.ConcurrentLinkedDeque;
-import java.util.concurrent.atomic.AtomicReference;
 
 /** Processes raw audio samples. */
-/* package */ final class AudioGraph implements GraphInput {
+/* package */ final class AudioGraph {
-  private static final int MAX_INPUT_BUFFER_COUNT = 10;
+  private final AudioMixerImpl mixer;
-  private final AudioFormat outputAudioFormat;
+  private final SparseArray<AudioGraphInput> inputs;
-  private final SilentAudioGenerator silentAudioGenerator;
-  private final Queue<DecoderInputBuffer> availableInputBuffers;
-  private final Queue<DecoderInputBuffer> pendingInputBuffers;
-  private final AtomicReference<@NullableType MediaItemChange> pendingMediaItemChange;
 
-  @Nullable private DecoderInputBuffer currentInputBufferBeingOutput;
+  private int finishedInputs;
-  private AudioProcessingPipeline audioProcessingPipeline;
+  private ByteBuffer currentOutput;
-  private boolean processedFirstMediaItemChange;
-  private boolean receivedEndOfStreamFromInput;
-  private boolean queueEndOfStreamAfterSilence;
 
-  // TODO(b/260618558): Move silent audio generation upstream of this component.
+  /** Creates an instance. */
-  public AudioGraph(Format firstInputFormat, EditedMediaItem firstEditedMediaItem)
+  public AudioGraph() {
-      throws UnhandledAudioFormatException {
+    mixer = new AudioMixerImpl(/* outputSilenceWithNoSources= */ false);
-    checkArgument(firstInputFormat.pcmEncoding != Format.NO_VALUE);
+    inputs = new SparseArray<>();
-    availableInputBuffers = new ConcurrentLinkedDeque<>();
+    currentOutput = EMPTY_BUFFER;
-    ByteBuffer emptyBuffer = ByteBuffer.allocateDirect(0).order(ByteOrder.nativeOrder());
-    for (int i = 0; i < MAX_INPUT_BUFFER_COUNT; i++) {
-      DecoderInputBuffer inputBuffer = new DecoderInputBuffer(BUFFER_REPLACEMENT_MODE_DIRECT);
-      inputBuffer.data = emptyBuffer;
-      availableInputBuffers.add(inputBuffer);
-    }
-    pendingInputBuffers = new ConcurrentLinkedDeque<>();
-    pendingMediaItemChange = new AtomicReference<>();
-    AudioFormat inputAudioFormat = new AudioFormat(firstInputFormat);
-    silentAudioGenerator = new SilentAudioGenerator(inputAudioFormat);
-    audioProcessingPipeline =
-        configureProcessing(
-            /* editedMediaItem= */ firstEditedMediaItem,
-            /* trackFormat= */ firstInputFormat,
-            /* inputAudioFormat= */ inputAudioFormat,
-            /* requiredOutputAudioFormat= */ AudioFormat.NOT_SET);
-    // APP configuration not active until flush called. getOutputAudioFormat based on active config.
-    audioProcessingPipeline.flush();
-    outputAudioFormat = audioProcessingPipeline.getOutputAudioFormat();
   }
 
-  public AudioFormat getOutputAudioFormat() {
+  /** Returns a new {@link AudioGraphInput} instance. */
-    return outputAudioFormat;
+  public AudioGraphInput registerInput(EditedMediaItem item, Format format) throws ExportException {
+    checkArgument(format.pcmEncoding != Format.NO_VALUE);
+    try {
+      AudioGraphInput audioGraphInput = new AudioGraphInput(item, format);
+
+      if (inputs.size() == 0) {
+        mixer.configure(
+            audioGraphInput.getOutputAudioFormat(),
+            /* bufferSizeMs= */ C.LENGTH_UNSET,
+            /* startTimeUs= */ 0);
+      }
+
+      int sourceId = mixer.addSource(audioGraphInput.getOutputAudioFormat(), /* startTimeUs= */ 0);
+      inputs.append(sourceId, audioGraphInput);
+      return audioGraphInput;
+    } catch (UnhandledAudioFormatException e) {
+      throw ExportException.createForAudioProcessing(e, "existingInputs=" + inputs.size());
+    }
   }
 
   /**
-   * Returns a {@link ByteBuffer} of output.
+   * Returns the {@link AudioFormat} of the {@linkplain #getOutput() output}.
    *
-   * @throws ExportException If the configuration of underlying components fails as a result of
+   * <p>{@link AudioFormat#NOT_SET} is returned if no inputs have been {@linkplain #registerInput
-   *     upstream changes.
+   * registered}.
+   */
+  public AudioFormat getOutputAudioFormat() {
+    return mixer.getOutputAudioFormat();
+  }
+
+  /**
+   * Returns a {@link ByteBuffer} containing output data between the position and limit.
+   *
+   * <p>The same buffer is returned until it has been fully consumed ({@code position == limit}).
    */
   public ByteBuffer getOutput() throws ExportException {
-    ByteBuffer outputBuffer = getOutputInternal();
+    if (!mixer.isEnded()) {
-
+      feedMixer();
-    if (outputBuffer.hasRemaining()) {
-      return outputBuffer;
     }
-
+    if (currentOutput.hasRemaining()) {
-    if (!hasDataToOutput() && pendingMediaItemChange.get() != null) {
+      return currentOutput;
-      try {
-        configureForPendingMediaItemChange();
-      } catch (AudioProcessor.UnhandledAudioFormatException e) {
-        throw ExportException.createForAudioProcessing(e, "AudioGraph reconfiguration");
-      }
     }
-
+    currentOutput = mixer.getOutput();
-    return EMPTY_BUFFER;
+    return currentOutput;
-  }
-
-  @Override
-  public void onMediaItemChanged(
-      EditedMediaItem editedMediaItem,
-      long durationUs,
-      @Nullable Format trackFormat,
-      boolean isLast) {
-    if (trackFormat == null) {
-      checkState(
-          durationUs != C.TIME_UNSET,
-          "Could not generate silent audio because duration is unknown.");
-    } else {
-      checkState(MimeTypes.isAudio(trackFormat.sampleMimeType));
-      checkState(trackFormat.pcmEncoding != Format.NO_VALUE);
-    }
-    pendingMediaItemChange.set(
-        new MediaItemChange(editedMediaItem, durationUs, trackFormat, isLast));
-  }
-
-  @Override
-  @Nullable
-  public DecoderInputBuffer getInputBuffer() {
-    if (silentAudioGenerator.hasRemaining() || pendingMediaItemChange.get() != null) {
-      return null;
-    }
-    return availableInputBuffers.peek();
-  }
-
-  @Override
-  public boolean queueInputBuffer() {
-    checkState(pendingMediaItemChange.get() == null);
-    DecoderInputBuffer inputBuffer = availableInputBuffers.remove();
-    pendingInputBuffers.add(inputBuffer);
-    return true;
   }
 
+  /** Releases underlying resources, including clearing the inputs. */
   public void release() {
-    audioProcessingPipeline.reset();
+    for (int i = 0; i < inputs.size(); i++) {
+      inputs.valueAt(i).release();
+    }
+    inputs.clear();
+    mixer.reset();
   }
 
   /** Returns whether the input has ended and all queued data has been output. */
   public boolean isEnded() {
-    if (hasDataToOutput()) {
+    return !currentOutput.hasRemaining() && finishedInputs >= inputs.size() && mixer.isEnded();
-      return false;
-    }
-    if (pendingMediaItemChange.get() != null) {
-      return false;
-    }
-    return receivedEndOfStreamFromInput || queueEndOfStreamAfterSilence;
   }
 
-  private ByteBuffer getOutputInternal() {
+  private void feedMixer() throws ExportException {
-    if (!processedFirstMediaItemChange) {
+    for (int i = 0; i < inputs.size(); i++) {
-      return EMPTY_BUFFER;
+      feedMixerFromInput(inputs.keyAt(i), inputs.valueAt(i));
     }
-
-    if (!audioProcessingPipeline.isOperational()) {
-      return feedOutputFromInput();
-    }
-
-    // Ensure APP progresses as much as possible.
-    while (feedProcessingPipelineFromInput()) {}
-    return audioProcessingPipeline.getOutput();
   }
 
-  private boolean feedProcessingPipelineFromInput() {
+  private void feedMixerFromInput(int sourceId, AudioGraphInput input) throws ExportException {
-    if (silentAudioGenerator.hasRemaining()) {
+    if (!mixer.hasSource(sourceId)) {
-      ByteBuffer inputData = silentAudioGenerator.getBuffer();
+      return;
-      audioProcessingPipeline.queueInput(inputData);
-      if (inputData.hasRemaining()) {
-        return false;
-      }
-      if (!silentAudioGenerator.hasRemaining()) {
-        audioProcessingPipeline.queueEndOfStream();
-        return false;
-      }
-      return true;
     }
 
-    @Nullable DecoderInputBuffer pendingInputBuffer = pendingInputBuffers.peek();
+    if (input.isEnded()) {
-    if (pendingInputBuffer == null) {
+      mixer.removeSource(sourceId);
-      if (pendingMediaItemChange.get() != null) {
+      finishedInputs++;
-        audioProcessingPipeline.queueEndOfStream();
+      return;
-      }
-      return false;
     }
 
-    if (pendingInputBuffer.isEndOfStream()) {
+    try {
-      audioProcessingPipeline.queueEndOfStream();
+      mixer.queueInput(sourceId, input.getOutput());
-      receivedEndOfStreamFromInput = true;
+    } catch (UnhandledAudioFormatException e) {
-      clearAndAddToAvailableBuffers(pendingInputBuffers.remove());
+      throw ExportException.createForAudioProcessing(
-      return false;
+          e, "AudioGraphInput (sourceId=" + sourceId + ") reconfiguration");
-    }
-
-    ByteBuffer inputData = checkNotNull(pendingInputBuffer.data);
-    audioProcessingPipeline.queueInput(inputData);
-    if (inputData.hasRemaining()) {
-      return false;
-    }
-    clearAndAddToAvailableBuffers(pendingInputBuffers.remove());
-    return true;
-  }
-
-  private ByteBuffer feedOutputFromInput() {
-    if (silentAudioGenerator.hasRemaining()) {
-      return silentAudioGenerator.getBuffer();
-    }
-
-    // When output is fed directly from input, the output ByteBuffer is linked to a specific
-    // DecoderInputBuffer. Therefore it must be consumed by the downstream component before it can
-    // be used for fresh input.
-    @Nullable DecoderInputBuffer previousOutputBuffer = currentInputBufferBeingOutput;
-    if (previousOutputBuffer != null) {
-      ByteBuffer data = checkStateNotNull(previousOutputBuffer.data);
-      if (data.hasRemaining()) {
-        // Currently output data has not been consumed, return it.
-        return data;
-      }
-      clearAndAddToAvailableBuffers(previousOutputBuffer);
-      currentInputBufferBeingOutput = null;
-    }
-
-    @Nullable DecoderInputBuffer currentInputBuffer = pendingInputBuffers.poll();
-    if (currentInputBuffer == null) {
-      return EMPTY_BUFFER;
-    }
-    @Nullable ByteBuffer currentInputBufferData = currentInputBuffer.data;
-    receivedEndOfStreamFromInput = currentInputBuffer.isEndOfStream();
-
-    // If there is no input data, make buffer available, ensuring underlying data reference is not
-    // kept. Data associated with EOS buffer is ignored.
-    if (currentInputBufferData == null
-        || !currentInputBufferData.hasRemaining()
-        || receivedEndOfStreamFromInput) {
-      clearAndAddToAvailableBuffers(currentInputBuffer);
-      return EMPTY_BUFFER;
-    }
-
-    currentInputBufferBeingOutput = currentInputBuffer;
-    return currentInputBufferData;
-  }
-
-  private boolean hasDataToOutput() {
-    if (!processedFirstMediaItemChange) {
-      return false;
-    }
-
-    if (currentInputBufferBeingOutput != null
-        && currentInputBufferBeingOutput.data != null
-        && currentInputBufferBeingOutput.data.hasRemaining()) {
-      return true;
-    }
-    if (silentAudioGenerator.hasRemaining()) {
-      return true;
-    }
-    if (!pendingInputBuffers.isEmpty()) {
-      return true;
-    }
-    if (audioProcessingPipeline.isOperational() && !audioProcessingPipeline.isEnded()) {
-      return true;
-    }
-    return false;
-  }
-
-  private void clearAndAddToAvailableBuffers(DecoderInputBuffer inputBuffer) {
-    inputBuffer.clear();
-    inputBuffer.timeUs = 0;
-    availableInputBuffers.add(inputBuffer);
-  }
-
-  /**
-   * Configures the graph based on the pending {@linkplain #onMediaItemChanged media item change}.
-   *
-   * <p>Before configuration, all {@linkplain #hasDataToOutput() pending data} must be consumed
-   * through {@link #getOutput()}.
-   */
-  private void configureForPendingMediaItemChange() throws UnhandledAudioFormatException {
-    MediaItemChange pendingChange = checkStateNotNull(pendingMediaItemChange.get());
-
-    AudioFormat pendingAudioFormat;
-    if (pendingChange.format != null) {
-      pendingAudioFormat = new AudioFormat(pendingChange.format);
-    } else { // Generating silence
-      pendingAudioFormat = silentAudioGenerator.audioFormat;
-      silentAudioGenerator.addSilence(pendingChange.durationUs);
-      if (pendingChange.isLast) {
-        queueEndOfStreamAfterSilence = true;
-      }
-    }
-
-    if (processedFirstMediaItemChange) {
-      // APP is configured in constructor for first media item.
-      audioProcessingPipeline =
-          configureProcessing(
-              /* editedMediaItem= */ pendingChange.editedMediaItem,
-              /* trackFormat= */ pendingChange.format,
-              /* inputAudioFormat= */ pendingAudioFormat,
-              /* requiredOutputAudioFormat= */ outputAudioFormat);
-    }
-    audioProcessingPipeline.flush();
-    pendingMediaItemChange.set(null);
-    receivedEndOfStreamFromInput = false;
-    processedFirstMediaItemChange = true;
-  }
-
-  private static AudioProcessingPipeline configureProcessing(
-      EditedMediaItem editedMediaItem,
-      @Nullable Format trackFormat,
-      AudioFormat inputAudioFormat,
-      AudioFormat requiredOutputAudioFormat)
-      throws UnhandledAudioFormatException {
-    ImmutableList.Builder<AudioProcessor> audioProcessors = new ImmutableList.Builder<>();
-    if (editedMediaItem.flattenForSlowMotion
-        && trackFormat != null
-        && trackFormat.metadata != null) {
-      audioProcessors.add(
-          new SpeedChangingAudioProcessor(new SegmentSpeedProvider(trackFormat.metadata)));
-    }
-    audioProcessors.addAll(editedMediaItem.effects.audioProcessors);
-    // Ensure the output from APP matches what the encoder is configured to receive.
-    if (!requiredOutputAudioFormat.equals(AudioFormat.NOT_SET)) {
-      SonicAudioProcessor sampleRateChanger = new SonicAudioProcessor();
-      sampleRateChanger.setOutputSampleRateHz(requiredOutputAudioFormat.sampleRate);
-      audioProcessors.add(sampleRateChanger);
-
-      // TODO(b/262706549): Handle channel mixing with AudioMixer.
-      if (requiredOutputAudioFormat.channelCount <= 2) {
-        // ChannelMixingMatrix.create only has defaults for mono/stereo input/output.
-        ChannelMixingAudioProcessor channelCountChanger = new ChannelMixingAudioProcessor();
-        channelCountChanger.putChannelMixingMatrix(
-            ChannelMixingMatrix.create(
-                /* inputChannelCount= */ 1, requiredOutputAudioFormat.channelCount));
-        channelCountChanger.putChannelMixingMatrix(
-            ChannelMixingMatrix.create(
-                /* inputChannelCount= */ 2, requiredOutputAudioFormat.channelCount));
-        audioProcessors.add(channelCountChanger);
-      }
-    }
-
-    AudioProcessingPipeline audioProcessingPipeline =
-        new AudioProcessingPipeline(audioProcessors.build());
-    AudioFormat outputAudioFormat = audioProcessingPipeline.configure(inputAudioFormat);
-    if (!requiredOutputAudioFormat.equals(AudioFormat.NOT_SET)
-        && !outputAudioFormat.equals(requiredOutputAudioFormat)) {
-      throw new UnhandledAudioFormatException(
-          "Audio format can not be modified to match existing downstream format", inputAudioFormat);
-    }
-
-    return audioProcessingPipeline;
-  }
-
-  private static final class MediaItemChange {
-    public final EditedMediaItem editedMediaItem;
-    public final long durationUs;
-    @Nullable public final Format format;
-    public final boolean isLast;
-
-    public MediaItemChange(
-        EditedMediaItem editedMediaItem, long durationUs, @Nullable Format format, boolean isLast) {
-      this.editedMediaItem = editedMediaItem;
-      this.durationUs = durationUs;
-      this.format = format;
-      this.isLast = isLast;
     }
   }
 }

libraries/transformer/src/main/java/androidx/media3/transformer/AudioGraphInput.java

@@ -0,0 +1,382 @@
+/*
+ * Copyright 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package androidx.media3.transformer;
+
+import static androidx.media3.common.audio.AudioProcessor.EMPTY_BUFFER;
+import static androidx.media3.common.util.Assertions.checkArgument;
+import static androidx.media3.common.util.Assertions.checkNotNull;
+import static androidx.media3.common.util.Assertions.checkState;
+import static androidx.media3.common.util.Assertions.checkStateNotNull;
+import static androidx.media3.decoder.DecoderInputBuffer.BUFFER_REPLACEMENT_MODE_DIRECT;
+
+import androidx.annotation.Nullable;
+import androidx.media3.common.C;
+import androidx.media3.common.Format;
+import androidx.media3.common.MimeTypes;
+import androidx.media3.common.audio.AudioProcessingPipeline;
+import androidx.media3.common.audio.AudioProcessor;
+import androidx.media3.common.audio.AudioProcessor.AudioFormat;
+import androidx.media3.common.audio.AudioProcessor.UnhandledAudioFormatException;
+import androidx.media3.common.audio.ChannelMixingAudioProcessor;
+import androidx.media3.common.audio.ChannelMixingMatrix;
+import androidx.media3.common.audio.SonicAudioProcessor;
+import androidx.media3.common.audio.SpeedChangingAudioProcessor;
+import androidx.media3.common.util.NullableType;
+import androidx.media3.decoder.DecoderInputBuffer;
+import com.google.common.collect.ImmutableList;
+import java.nio.ByteBuffer;
+import java.nio.ByteOrder;
+import java.util.Queue;
+import java.util.concurrent.ConcurrentLinkedDeque;
+import java.util.concurrent.atomic.AtomicReference;
+
+/**
+ * Processes a single stream of raw audio samples.
+ *
+ * <p>Handles changes to the {@link Format} and {@link Effects} on {@linkplain #onMediaItemChanged
+ * item boundaries}.
+ */
+/* package */ final class AudioGraphInput implements GraphInput {
+  private static final int MAX_INPUT_BUFFER_COUNT = 10;
+  private final AudioFormat outputAudioFormat;
+
+  // TODO(b/260618558): Move silent audio generation upstream of this component.
+  private final SilentAudioGenerator silentAudioGenerator;
+  private final Queue<DecoderInputBuffer> availableInputBuffers;
+  private final Queue<DecoderInputBuffer> pendingInputBuffers;
+  private final AtomicReference<@NullableType MediaItemChange> pendingMediaItemChange;
+
+  @Nullable private DecoderInputBuffer currentInputBufferBeingOutput;
+  private AudioProcessingPipeline audioProcessingPipeline;
+  private boolean processedFirstMediaItemChange;
+  private boolean receivedEndOfStreamFromInput;
+  private boolean queueEndOfStreamAfterSilence;
+
+  public AudioGraphInput(EditedMediaItem item, Format inputFormat)
+      throws UnhandledAudioFormatException {
+    checkArgument(inputFormat.pcmEncoding != Format.NO_VALUE);
+    availableInputBuffers = new ConcurrentLinkedDeque<>();
+    ByteBuffer emptyBuffer = ByteBuffer.allocateDirect(0).order(ByteOrder.nativeOrder());
+    for (int i = 0; i < MAX_INPUT_BUFFER_COUNT; i++) {
+      DecoderInputBuffer inputBuffer = new DecoderInputBuffer(BUFFER_REPLACEMENT_MODE_DIRECT);
+      inputBuffer.data = emptyBuffer;
+      availableInputBuffers.add(inputBuffer);
+    }
+    pendingInputBuffers = new ConcurrentLinkedDeque<>();
+    pendingMediaItemChange = new AtomicReference<>();
+    AudioFormat inputAudioFormat = new AudioFormat(inputFormat);
+    silentAudioGenerator = new SilentAudioGenerator(inputAudioFormat);
+    audioProcessingPipeline =
+        configureProcessing(
+            /* editedMediaItem= */ item,
+            /* inputFormat= */ inputFormat,
+            /* inputAudioFormat= */ inputAudioFormat,
+            /* requiredOutputAudioFormat= */ AudioFormat.NOT_SET);
+    // APP configuration not active until flush called. getOutputAudioFormat based on active config.
+    audioProcessingPipeline.flush();
+    outputAudioFormat = audioProcessingPipeline.getOutputAudioFormat();
+  }
+
+  public AudioFormat getOutputAudioFormat() {
+    return outputAudioFormat;
+  }
+
+  /**
+   * Returns a {@link ByteBuffer} of output.
+   *
+   * @throws UnhandledAudioFormatException If the configuration of underlying components fails as a
+   *     result of upstream changes.
+   */
+  public ByteBuffer getOutput() throws UnhandledAudioFormatException {
+    ByteBuffer outputBuffer = getOutputInternal();
+
+    if (outputBuffer.hasRemaining()) {
+      return outputBuffer;
+    }
+
+    if (!hasDataToOutput() && pendingMediaItemChange.get() != null) {
+      configureForPendingMediaItemChange();
+    }
+
+    return EMPTY_BUFFER;
+  }
+
+  @Override
+  public void onMediaItemChanged(
+      EditedMediaItem editedMediaItem,
+      long durationUs,
+      @Nullable Format trackFormat,
+      boolean isLast) {
+    if (trackFormat == null) {
+      checkState(
+          durationUs != C.TIME_UNSET,
+          "Could not generate silent audio because duration is unknown.");
+    } else {
+      checkState(MimeTypes.isAudio(trackFormat.sampleMimeType));
+      checkState(trackFormat.pcmEncoding != Format.NO_VALUE);
+    }
+    pendingMediaItemChange.set(
+        new MediaItemChange(editedMediaItem, durationUs, trackFormat, isLast));
+  }
+
+  @Override
+  @Nullable
+  public DecoderInputBuffer getInputBuffer() {
+    if (silentAudioGenerator.hasRemaining() || pendingMediaItemChange.get() != null) {
+      return null;
+    }
+    return availableInputBuffers.peek();
+  }
+
+  @Override
+  public boolean queueInputBuffer() {
+    checkState(pendingMediaItemChange.get() == null);
+    DecoderInputBuffer inputBuffer = availableInputBuffers.remove();
+    pendingInputBuffers.add(inputBuffer);
+    return true;
+  }
+
+  public void release() {
+    audioProcessingPipeline.reset();
+  }
+
+  /** Returns whether the input has ended and all queued data has been output. */
+  public boolean isEnded() {
+    if (hasDataToOutput()) {
+      return false;
+    }
+    if (pendingMediaItemChange.get() != null) {
+      return false;
+    }
+    return receivedEndOfStreamFromInput || queueEndOfStreamAfterSilence;
+  }
+
+  private ByteBuffer getOutputInternal() {
+    if (!processedFirstMediaItemChange) {
+      return EMPTY_BUFFER;
+    }
+
+    if (!audioProcessingPipeline.isOperational()) {
+      return feedOutputFromInput();
+    }
+
+    // Ensure APP progresses as much as possible.
+    while (feedProcessingPipelineFromInput()) {}
+    return audioProcessingPipeline.getOutput();
+  }
+
+  private boolean feedProcessingPipelineFromInput() {
+    if (silentAudioGenerator.hasRemaining()) {
+      ByteBuffer inputData = silentAudioGenerator.getBuffer();
+      audioProcessingPipeline.queueInput(inputData);
+      if (inputData.hasRemaining()) {
+        return false;
+      }
+      if (!silentAudioGenerator.hasRemaining()) {
+        audioProcessingPipeline.queueEndOfStream();
+        return false;
+      }
+      return true;
+    }
+
+    @Nullable DecoderInputBuffer pendingInputBuffer = pendingInputBuffers.peek();
+    if (pendingInputBuffer == null) {
+      if (pendingMediaItemChange.get() != null) {
+        audioProcessingPipeline.queueEndOfStream();
+      }
+      return false;
+    }
+
+    if (pendingInputBuffer.isEndOfStream()) {
+      audioProcessingPipeline.queueEndOfStream();
+      receivedEndOfStreamFromInput = true;
+      clearAndAddToAvailableBuffers(pendingInputBuffers.remove());
+      return false;
+    }
+
+    ByteBuffer inputData = checkNotNull(pendingInputBuffer.data);
+    audioProcessingPipeline.queueInput(inputData);
+    if (inputData.hasRemaining()) {
+      return false;
+    }
+    clearAndAddToAvailableBuffers(pendingInputBuffers.remove());
+    return true;
+  }
+
+  private ByteBuffer feedOutputFromInput() {
+    if (silentAudioGenerator.hasRemaining()) {
+      return silentAudioGenerator.getBuffer();
+    }
+
+    // When output is fed directly from input, the output ByteBuffer is linked to a specific
+    // DecoderInputBuffer. Therefore it must be consumed by the downstream component before it can
+    // be used for fresh input.
+    @Nullable DecoderInputBuffer previousOutputBuffer = currentInputBufferBeingOutput;
+    if (previousOutputBuffer != null) {
+      ByteBuffer data = checkStateNotNull(previousOutputBuffer.data);
+      if (data.hasRemaining()) {
+        // Currently output data has not been consumed, return it.
+        return data;
+      }
+      clearAndAddToAvailableBuffers(previousOutputBuffer);
+      currentInputBufferBeingOutput = null;
+    }
+
+    @Nullable DecoderInputBuffer currentInputBuffer = pendingInputBuffers.poll();
+    if (currentInputBuffer == null) {
+      return EMPTY_BUFFER;
+    }
+    @Nullable ByteBuffer currentInputBufferData = currentInputBuffer.data;
+    receivedEndOfStreamFromInput = currentInputBuffer.isEndOfStream();
+
+    // If there is no input data, make buffer available, ensuring underlying data reference is not
+    // kept. Data associated with EOS buffer is ignored.
+    if (currentInputBufferData == null
+        || !currentInputBufferData.hasRemaining()
+        || receivedEndOfStreamFromInput) {
+      clearAndAddToAvailableBuffers(currentInputBuffer);
+      return EMPTY_BUFFER;
+    }
+
+    currentInputBufferBeingOutput = currentInputBuffer;
+    return currentInputBufferData;
+  }
+
+  private boolean hasDataToOutput() {
+    if (!processedFirstMediaItemChange) {
+      return false;
+    }
+
+    if (currentInputBufferBeingOutput != null
+        && currentInputBufferBeingOutput.data != null
+        && currentInputBufferBeingOutput.data.hasRemaining()) {
+      return true;
+    }
+    if (silentAudioGenerator.hasRemaining()) {
+      return true;
+    }
+    if (!pendingInputBuffers.isEmpty()) {
+      return true;
+    }
+    if (audioProcessingPipeline.isOperational() && !audioProcessingPipeline.isEnded()) {
+      return true;
+    }
+    return false;
+  }
+
+  private void clearAndAddToAvailableBuffers(DecoderInputBuffer inputBuffer) {
+    inputBuffer.clear();
+    inputBuffer.timeUs = 0;
+    availableInputBuffers.add(inputBuffer);
+  }
+
+  /**
+   * Configures the graph based on the pending {@linkplain #onMediaItemChanged media item change}.
+   *
+   * <p>Before configuration, all {@linkplain #hasDataToOutput() pending data} must be consumed
+   * through {@link #getOutput()}.
+   */
+  private void configureForPendingMediaItemChange() throws UnhandledAudioFormatException {
+    MediaItemChange pendingChange = checkStateNotNull(pendingMediaItemChange.get());
+
+    AudioFormat pendingAudioFormat;
+    if (pendingChange.format != null) {
+      pendingAudioFormat = new AudioFormat(pendingChange.format);
+    } else { // Generating silence
+      pendingAudioFormat = silentAudioGenerator.audioFormat;
+      silentAudioGenerator.addSilence(pendingChange.durationUs);
+      if (pendingChange.isLast) {
+        queueEndOfStreamAfterSilence = true;
+      }
+    }
+
+    if (processedFirstMediaItemChange) {
+      // APP is configured in constructor for first media item.
+      audioProcessingPipeline =
+          configureProcessing(
+              /* editedMediaItem= */ pendingChange.editedMediaItem,
+              /* inputFormat= */ pendingChange.format,
+              /* inputAudioFormat= */ pendingAudioFormat,
+              /* requiredOutputAudioFormat= */ outputAudioFormat);
+    }
+    audioProcessingPipeline.flush();
+    pendingMediaItemChange.set(null);
+    receivedEndOfStreamFromInput = false;
+    processedFirstMediaItemChange = true;
+  }
+
+  private static AudioProcessingPipeline configureProcessing(
+      EditedMediaItem editedMediaItem,
+      @Nullable Format inputFormat,
+      AudioFormat inputAudioFormat,
+      AudioFormat requiredOutputAudioFormat)
+      throws UnhandledAudioFormatException {
+    ImmutableList.Builder<AudioProcessor> audioProcessors = new ImmutableList.Builder<>();
+    if (editedMediaItem.flattenForSlowMotion
+        && inputFormat != null
+        && inputFormat.metadata != null) {
+      audioProcessors.add(
+          new SpeedChangingAudioProcessor(new SegmentSpeedProvider(inputFormat.metadata)));
+    }
+    audioProcessors.addAll(editedMediaItem.effects.audioProcessors);
+    // Ensure the output from APP matches what the encoder is configured to receive.
+    if (!requiredOutputAudioFormat.equals(AudioFormat.NOT_SET)) {
+      SonicAudioProcessor sampleRateChanger = new SonicAudioProcessor();
+      sampleRateChanger.setOutputSampleRateHz(requiredOutputAudioFormat.sampleRate);
+      audioProcessors.add(sampleRateChanger);
+
+      // TODO(b/262706549): Handle channel mixing with AudioMixer.
+      if (requiredOutputAudioFormat.channelCount <= 2) {
+        // ChannelMixingMatrix.create only has defaults for mono/stereo input/output.
+        ChannelMixingAudioProcessor channelCountChanger = new ChannelMixingAudioProcessor();
+        channelCountChanger.putChannelMixingMatrix(
+            ChannelMixingMatrix.create(
+                /* inputChannelCount= */ 1, requiredOutputAudioFormat.channelCount));
+        channelCountChanger.putChannelMixingMatrix(
+            ChannelMixingMatrix.create(
+                /* inputChannelCount= */ 2, requiredOutputAudioFormat.channelCount));
+        audioProcessors.add(channelCountChanger);
+      }
+    }
+
+    AudioProcessingPipeline audioProcessingPipeline =
+        new AudioProcessingPipeline(audioProcessors.build());
+    AudioFormat outputAudioFormat = audioProcessingPipeline.configure(inputAudioFormat);
+    if (!requiredOutputAudioFormat.equals(AudioFormat.NOT_SET)
+        && !outputAudioFormat.equals(requiredOutputAudioFormat)) {
+      throw new UnhandledAudioFormatException(
+          "Audio can not be modified to match downstream format", inputAudioFormat);
+    }
+
+    return audioProcessingPipeline;
+  }
+
+  private static final class MediaItemChange {
+    public final EditedMediaItem editedMediaItem;
+    public final long durationUs;
+    @Nullable public final Format format;
+    public final boolean isLast;
+
+    public MediaItemChange(
+        EditedMediaItem editedMediaItem, long durationUs, @Nullable Format format, boolean isLast) {
+      this.editedMediaItem = editedMediaItem;
+      this.durationUs = durationUs;
+      this.format = format;
+      this.isLast = isLast;
+    }
+  }
+}

libraries/transformer/src/main/java/androidx/media3/transformer/AudioMixer.java

@@ -15,6 +15,7 @@
  */
 package androidx.media3.transformer;
 
+import androidx.media3.common.C;
 import androidx.media3.common.audio.AudioProcessor.AudioFormat;
 import androidx.media3.common.audio.AudioProcessor.UnhandledAudioFormatException;
 import androidx.media3.common.util.UnstableApi;
@@ -54,7 +55,7 @@ import java.nio.ByteBuffer;
 public interface AudioMixer {
   /** Creates an unconfigured instance. */
   public static AudioMixer create() {
-    return new AudioMixerImpl();
+    return new AudioMixerImpl(/* outputSilenceWithNoSources= */ true);
   }
 
   /**
@@ -67,7 +68,7 @@ public interface AudioMixer {
    * queued before {@link #getOutput()} is called.
    *
    * @param outputAudioFormat The audio format of buffers returned from {@link #getOutput()}.
-   * @param bufferSizeMs The mixing buffer size in milliseconds.
+   * @param bufferSizeMs The optional mixing buffer size in milliseconds, or {@link C#LENGTH_UNSET}.
    * @param startTimeUs The start time of the mixer output in microseconds.
    * @throws UnhandledAudioFormatException If the output audio format is not supported.
    */

libraries/transformer/src/main/java/androidx/media3/transformer/AudioMixerImpl.java

@@ -15,9 +15,11 @@
  */
 package androidx.media3.transformer;
 
+import static androidx.media3.common.audio.AudioProcessor.EMPTY_BUFFER;
 import static androidx.media3.common.util.Assertions.checkArgument;
 import static androidx.media3.common.util.Assertions.checkState;
 import static androidx.media3.common.util.Assertions.checkStateNotNull;
+import static java.lang.Math.max;
 import static java.lang.Math.min;
 
 import android.util.SparseArray;
@@ -33,8 +35,8 @@ import java.nio.ByteOrder;
 /** An {@link AudioMixer} that incrementally mixes source audio into a fixed size mixing buffer. */
 /* package */ final class AudioMixerImpl implements AudioMixer {
 
-  private static final ByteBuffer EMPTY_BUFFER =
+  // TODO(b/290002438, b/276734854): Improve buffer management & determine best default size.
-      ByteBuffer.allocateDirect(0).order(ByteOrder.nativeOrder());
+  private static final int DEFAULT_BUFFER_SIZE_MS = 500;
 
   private final SparseArray<SourceInfo> sources;
   private int nextSourceId;
@@ -52,7 +54,19 @@ import java.nio.ByteOrder;
   /** Position (in frames) of the mixer end point, relative to the mixer start. */
   private long endPosition;
 
-  public AudioMixerImpl() {
+  /**
+   * Largest position (in frames) of {@link #removeSource(int) removed} sources, relative to the
+   * mixer start.
+   */
+  private long maxPositionOfRemovedSources;
+
+  /**
+   * Creates an instance.
+   *
+   * @param outputSilenceWithNoSources Whether {@link #getOutput()} should output buffers of silence
+   *     when there are no {@link #addSource sources}.
+   */
+  public AudioMixerImpl(boolean outputSilenceWithNoSources) {
     sources = new SparseArray<>();
     outputAudioFormat = AudioFormat.NOT_SET;
     bufferSizeFrames = C.LENGTH_UNSET;
@@ -60,6 +74,13 @@ import java.nio.ByteOrder;
     mixerStartTimeUs = C.TIME_UNSET;
     inputLimit = C.LENGTH_UNSET;
     endPosition = Long.MAX_VALUE;
+    if (outputSilenceWithNoSources) {
+      maxPositionOfRemovedSources = Long.MAX_VALUE;
+    }
+  }
+
+  public AudioFormat getOutputAudioFormat() {
+    return outputAudioFormat;
   }
 
   @Override
@@ -68,6 +89,11 @@ import java.nio.ByteOrder;
     checkState(
         this.outputAudioFormat.equals(AudioFormat.NOT_SET), "Audio mixer already configured.");
 
+    if (bufferSizeMs == C.LENGTH_UNSET) {
+      bufferSizeMs = DEFAULT_BUFFER_SIZE_MS;
+    }
+    checkArgument(bufferSizeMs > 0);
+
     if (!AudioMixingUtil.canMix(outputAudioFormat)) {
       throw new UnhandledAudioFormatException(
           "Can not mix to this AudioFormat.", outputAudioFormat);
@@ -75,7 +101,6 @@ import java.nio.ByteOrder;
     this.outputAudioFormat = outputAudioFormat;
     bufferSizeFrames = bufferSizeMs * outputAudioFormat.sampleRate / 1000;
     mixerStartTimeUs = startTimeUs;
-
     mixingBuffers =
         new MixingBuffer[] {allocateMixingBuffer(0), allocateMixingBuffer(bufferSizeFrames)};
     updateInputFrameLimit();
@@ -106,7 +131,8 @@ import java.nio.ByteOrder;
       throws UnhandledAudioFormatException {
     checkStateIsConfigured();
     if (!supportsSourceAudioFormat(sourceFormat)) {
-      throw new UnhandledAudioFormatException(sourceFormat);
+      throw new UnhandledAudioFormatException(
+          "Can not add source. MixerFormat=" + outputAudioFormat, sourceFormat);
     }
 
     long startFrameOffset =
@@ -125,6 +151,11 @@ import java.nio.ByteOrder;
     return sourceId;
   }
 
+  public boolean hasSource(int sourceId) {
+    checkStateIsConfigured();
+    return sources.get(sourceId) != null;
+  }
+
   @Override
   public void setSourceVolume(int sourceId, float volume) {
     checkStateIsConfigured();
@@ -137,12 +168,17 @@ import java.nio.ByteOrder;
   @Override
   public void removeSource(int sourceId) {
     checkStateIsConfigured();
+    maxPositionOfRemovedSources =
+        max(maxPositionOfRemovedSources, getSourceById(sourceId).position);
     sources.delete(sourceId);
   }
 
   @Override
   public void queueInput(int sourceId, ByteBuffer sourceBuffer) {
     checkStateIsConfigured();
+    if (!sourceBuffer.hasRemaining()) {
+      return;
+    }
 
     SourceInfo source = getSourceById(sourceId);
     if (source.position >= inputLimit) {
@@ -188,8 +224,12 @@ import java.nio.ByteOrder;
   @Override
   public ByteBuffer getOutput() {
     checkStateIsConfigured();
+    if (isEnded()) {
+      return EMPTY_BUFFER;
+    }
+
+    long minSourcePosition = sources.size() == 0 ? maxPositionOfRemovedSources : endPosition;
 
-    long minSourcePosition = endPosition;
     for (int i = 0; i < sources.size(); i++) {
       minSourcePosition = min(minSourcePosition, sources.valueAt(i).position);
     }
@@ -221,7 +261,8 @@ import java.nio.ByteOrder;
   @Override
   public boolean isEnded() {
     checkStateIsConfigured();
-    return outputPosition >= endPosition;
+    return outputPosition >= endPosition
+        || (outputPosition >= maxPositionOfRemovedSources && sources.size() == 0);
   }
 
   @Override

libraries/transformer/src/main/java/androidx/media3/transformer/AudioSampleExporter.java

@@ -16,7 +16,6 @@
 
 package androidx.media3.transformer;
 
-import static androidx.media3.common.util.Assertions.checkArgument;
 import static androidx.media3.common.util.Assertions.checkNotNull;
 import static androidx.media3.common.util.Assertions.checkState;
 import static androidx.media3.decoder.DecoderInputBuffer.BUFFER_REPLACEMENT_MODE_DISABLED;
@@ -25,7 +24,6 @@ import static java.lang.Math.min;
 import androidx.annotation.Nullable;
 import androidx.media3.common.C;
 import androidx.media3.common.Format;
-import androidx.media3.common.audio.AudioProcessor;
 import androidx.media3.common.audio.AudioProcessor.AudioFormat;
 import androidx.media3.common.util.Util;
 import androidx.media3.decoder.DecoderInputBuffer;
@@ -43,25 +41,25 @@ import org.checkerframework.dataflow.qual.Pure;
   private final DecoderInputBuffer encoderOutputBuffer;
   private final AudioGraph audioGraph;
 
+  private final AudioGraphInput firstInput;
+  private final Format firstInputFormat;
+
+  private boolean returnedFirstInput;
   private long encoderTotalInputBytes;
 
   public AudioSampleExporter(
-      Format firstAssetLoaderInputFormat,
+      Format firstAssetLoaderTrackFormat,
-      Format firstExporterInputFormat,
+      Format firstInputFormat,
       TransformationRequest transformationRequest,
       EditedMediaItem firstEditedMediaItem,
       Codec.EncoderFactory encoderFactory,
       MuxerWrapper muxerWrapper,
       FallbackListener fallbackListener)
       throws ExportException {
-    super(firstAssetLoaderInputFormat, muxerWrapper);
+    super(firstAssetLoaderTrackFormat, muxerWrapper);
-    checkArgument(firstExporterInputFormat.pcmEncoding != Format.NO_VALUE);
+    audioGraph = new AudioGraph();
-
+    this.firstInputFormat = firstInputFormat;
-    try {
+    firstInput = audioGraph.registerInput(firstEditedMediaItem, firstInputFormat);
-      audioGraph = new AudioGraph(firstExporterInputFormat, firstEditedMediaItem);
-    } catch (AudioProcessor.UnhandledAudioFormatException e) {
-      throw ExportException.createForAudioProcessing(e, "AudioGraph initialization");
-    }
     encoderInputAudioFormat = audioGraph.getOutputAudioFormat();
     checkState(!encoderInputAudioFormat.equals(AudioFormat.NOT_SET));
 
@@ -70,7 +68,7 @@ import org.checkerframework.dataflow.qual.Pure;
             .setSampleMimeType(
                 transformationRequest.audioMimeType != null
                     ? transformationRequest.audioMimeType
-                    : checkNotNull(firstAssetLoaderInputFormat.sampleMimeType))
+                    : checkNotNull(firstAssetLoaderTrackFormat.sampleMimeType))
             .setSampleRate(encoderInputAudioFormat.sampleRate)
             .setChannelCount(encoderInputAudioFormat.channelCount)
             .setPcmEncoding(encoderInputAudioFormat.encoding)
@@ -97,8 +95,14 @@ import org.checkerframework.dataflow.qual.Pure;
   }
 
   @Override
-  public GraphInput getInput() {
+  public AudioGraphInput getInput(EditedMediaItem item, Format format) throws ExportException {
-    return audioGraph;
+    if (!returnedFirstInput) {
+      // First input initialized in constructor because output AudioFormat is needed.
+      returnedFirstInput = true;
+      checkState(format.equals(this.firstInputFormat));
+      return firstInput;
+    }
+    return audioGraph.registerInput(item, format);
   }
 
   @Override
@@ -110,7 +114,6 @@ import org.checkerframework.dataflow.qual.Pure;
   @Override
   protected boolean processDataUpToMuxer() throws ExportException {
 
-    // Returns same buffer until consumed. getOutput internally progresses underlying input data.
     ByteBuffer audioGraphBuffer = audioGraph.getOutput();
 
     if (!encoder.maybeDequeueInputBuffer(encoderInputBuffer)) {

libraries/transformer/src/main/java/androidx/media3/transformer/EncodedSampleExporter.java

@@ -89,7 +89,7 @@ import java.util.concurrent.atomic.AtomicLong;
   }
 
   @Override
-  public GraphInput getInput() {
+  public GraphInput getInput(EditedMediaItem item, Format format) {
     return this;
   }
 

libraries/transformer/src/main/java/androidx/media3/transformer/SampleExporter.java

@@ -61,8 +61,13 @@ import java.util.List;
    * from the thread used to call the other {@link GraphInput} methods. All subsequent {@link
    * GraphInput} method calls must be made from the thread on which {@link
    * GraphInput#onMediaItemChanged} is called.
+   *
+   * @param editedMediaItem The initial {@link EditedMediaItem} of the input.
+   * @param format The initial {@link Format} of the input.
+   * @throws ExportException If an error occurs getting the input.
    */
-  public abstract GraphInput getInput();
+  public abstract GraphInput getInput(EditedMediaItem editedMediaItem, Format format)
+      throws ExportException;
 
   /**
    * Processes the input data and returns whether it may be possible to process more data by calling

libraries/transformer/src/main/java/androidx/media3/transformer/TransformerInternal.java

@@ -531,7 +531,8 @@ import org.checkerframework.checker.nullness.qual.MonotonicNonNull;
           return null;
         }
 
-        GraphInput sampleExporterInput = sampleExporter.getInput();
+        GraphInput sampleExporterInput =
+            sampleExporter.getInput(editedMediaItems.get(0), assetLoaderOutputFormat);
         OnMediaItemChangedListener onMediaItemChangedListener =
             (editedMediaItem, durationUs, trackFormat, isLast) -> {
               onMediaItemChanged(trackType, durationUs, isLast);
@@ -569,15 +570,14 @@ import org.checkerframework.checker.nullness.qual.MonotonicNonNull;
       checkState(assetLoaderInputTracker.getSampleExporter(trackType) == null);
       Format firstAssetLoaderInputFormat =
           assetLoaderInputTracker.getAssetLoaderInputFormat(sequenceIndex, trackType);
-      EditedMediaItem firstEditedMediaItem = editedMediaItems.get(0);
       if (MimeTypes.isAudio(assetLoaderOutputFormat.sampleMimeType)) {
         assetLoaderInputTracker.registerSampleExporter(
             C.TRACK_TYPE_AUDIO,
             new AudioSampleExporter(
                 firstAssetLoaderInputFormat,
-                /* firstExporterInputFormat= */ assetLoaderOutputFormat,
+                /* firstInputFormat= */ assetLoaderOutputFormat,
                 transformationRequest,
-                firstEditedMediaItem,
+                editedMediaItems.get(0),
                 encoderFactory,
                 muxerWrapper,
                 fallbackListener));

libraries/transformer/src/main/java/androidx/media3/transformer/VideoSampleExporter.java

@@ -174,7 +174,7 @@ import org.checkerframework.dataflow.qual.Pure;
   }
 
   @Override
-  public GraphInput getInput() {
+  public GraphInput getInput(EditedMediaItem item, Format format) {
     return singleInputVideoGraph;
   }
 

libraries/transformer/src/test/java/androidx/media3/transformer/AudioMixerImplTest.java

@@ -18,28 +18,47 @@ package androidx.media3.transformer;
 import static androidx.media3.test.utils.TestUtil.createByteBuffer;
 import static androidx.media3.test.utils.TestUtil.createFloatArray;
 import static com.google.common.truth.Truth.assertThat;
+import static org.junit.Assume.assumeFalse;
+import static org.junit.Assume.assumeTrue;
 
 import androidx.media3.common.C;
 import androidx.media3.common.audio.AudioProcessor.AudioFormat;
-import androidx.test.ext.junit.runners.AndroidJUnit4;
+import com.google.common.collect.ImmutableList;
 import java.nio.ByteBuffer;
+import org.junit.Before;
 import org.junit.Test;
 import org.junit.runner.RunWith;
+import org.robolectric.ParameterizedRobolectricTestRunner;
+import org.robolectric.ParameterizedRobolectricTestRunner.Parameter;
+import org.robolectric.ParameterizedRobolectricTestRunner.Parameters;
 
 /** Unit tests for {@link AudioMixerImpl}. */
-@RunWith(AndroidJUnit4.class)
+@RunWith(ParameterizedRobolectricTestRunner.class)
 public final class AudioMixerImplTest {
 
+  @Parameters(name = "{0}")
+  public static ImmutableList<Boolean> parameters() {
+    return ImmutableList.of(false, true);
+  }
+
   private static final int SAMPLE_RATE = 1000; // 1 ms = 1 frame.
   private static final AudioFormat AUDIO_FORMAT_STEREO_PCM_FLOAT =
       new AudioFormat(SAMPLE_RATE, /* channelCount= */ 2, C.ENCODING_PCM_FLOAT);
   private static final AudioFormat AUDIO_FORMAT_STEREO_PCM_16BIT =
       new AudioFormat(SAMPLE_RATE, /* channelCount= */ 2, C.ENCODING_PCM_16BIT);
 
-  private final AudioMixer mixer = new AudioMixerImpl();
+  @Parameter public boolean outputSilenceWithNoSources;
+
+  private AudioMixer mixer;
+
+  @Before
+  public void setup() {
+    mixer = new AudioMixerImpl(outputSilenceWithNoSources);
+  }
 
   @Test
-  public void output_withNoSource_isSilence() throws Exception {
+  public void output_withNoSource_whenOutputSilenceWithNoSources_isSilence() throws Exception {
+    assumeTrue(outputSilenceWithNoSources);
     mixer.configure(AUDIO_FORMAT_STEREO_PCM_FLOAT, /* bufferSizeMs= */ 3, /* startTimeUs= */ 0);
 
     assertThat(createFloatArray(mixer.getOutput())).isEqualTo(new float[6]);
@@ -47,6 +66,41 @@ public final class AudioMixerImplTest {
     assertThat(createFloatArray(mixer.getOutput())).isEqualTo(new float[6]);
   }
 
+  @Test
+  public void output_withOneEndedSource_whenOutputSilenceWithNoSources_isInputThenSilence()
+      throws Exception {
+    assumeTrue(outputSilenceWithNoSources);
+    mixer.configure(AUDIO_FORMAT_STEREO_PCM_FLOAT, /* bufferSizeMs= */ 3, /* startTimeUs= */ 0);
+
+    int sourceId = mixer.addSource(AUDIO_FORMAT_STEREO_PCM_FLOAT, /* startTimeUs= */ 0);
+    mixer.queueInput(sourceId, createByteBuffer(new float[] {0.1f, -0.1f}));
+    mixer.removeSource(sourceId);
+
+    assertThat(createFloatArray(mixer.getOutput()))
+        .isEqualTo(new float[] {0.1f, -0.1f, 0f, 0f, 0f, 0f});
+  }
+
+  @Test
+  public void output_withNoSource_whenNotOutputSilenceWithNoSources_isEmpty() throws Exception {
+    assumeFalse(outputSilenceWithNoSources);
+    mixer.configure(AUDIO_FORMAT_STEREO_PCM_FLOAT, /* bufferSizeMs= */ 3, /* startTimeUs= */ 0);
+
+    assertThat(createFloatArray(mixer.getOutput())).isEqualTo(new float[0]);
+  }
+
+  @Test
+  public void output_withOneEndedSource_whenNotOutputSilenceWithNoSources_isInput()
+      throws Exception {
+    assumeFalse(outputSilenceWithNoSources);
+    mixer.configure(AUDIO_FORMAT_STEREO_PCM_FLOAT, /* bufferSizeMs= */ 3, /* startTimeUs= */ 0);
+
+    int sourceId = mixer.addSource(AUDIO_FORMAT_STEREO_PCM_FLOAT, /* startTimeUs= */ 0);
+    mixer.queueInput(sourceId, createByteBuffer(new float[] {0.1f, -0.1f}));
+    mixer.removeSource(sourceId);
+
+    assertThat(createFloatArray(mixer.getOutput())).isEqualTo(new float[] {0.1f, -0.1f});
+  }
+
   @Test
   public void output_withOneSource_isInput() throws Exception {
     mixer.configure(AUDIO_FORMAT_STEREO_PCM_FLOAT, /* bufferSizeMs= */ 3, /* startTimeUs= */ 0);
@@ -219,18 +273,6 @@ public final class AudioMixerImplTest {
         .isEqualTo(new float[] {0.125f, 0.25f, 0.125f, 0.25f, 0.125f, 0.25f});
   }
 
-  @Test
-  public void output_withOneEndedSource_isInputThenSilence() throws Exception {
-    mixer.configure(AUDIO_FORMAT_STEREO_PCM_FLOAT, /* bufferSizeMs= */ 3, /* startTimeUs= */ 0);
-
-    int sourceId = mixer.addSource(AUDIO_FORMAT_STEREO_PCM_FLOAT, /* startTimeUs= */ 0);
-    mixer.queueInput(sourceId, createByteBuffer(new float[] {0.1f, -0.1f}));
-    mixer.removeSource(sourceId);
-
-    assertThat(createFloatArray(mixer.getOutput()))
-        .isEqualTo(new float[] {0.1f, -0.1f, 0f, 0f, 0f, 0f});
-  }
-
   @Test
   public void output_withOneSourceAndEndTime_isInputUntilEndTime() throws Exception {
     mixer.configure(

libraries/transformer/src/test/java/androidx/media3/transformer/CompositionExportTest.java

@@ -15,16 +15,24 @@
  */
 package androidx.media3.transformer;
 
+import static androidx.media3.common.util.Assertions.checkNotNull;
 import static androidx.media3.transformer.TestUtil.ASSET_URI_PREFIX;
 import static androidx.media3.transformer.TestUtil.FILE_AUDIO_ONLY;
+import static androidx.media3.transformer.TestUtil.FILE_AUDIO_RAW;
+import static androidx.media3.transformer.TestUtil.FILE_AUDIO_RAW_VIDEO;
 import static androidx.media3.transformer.TestUtil.FILE_AUDIO_VIDEO;
+import static androidx.media3.transformer.TestUtil.FILE_AUDIO_VIDEO_INCREASING_TIMESTAMPS_15S;
 import static androidx.media3.transformer.TestUtil.FILE_VIDEO_ONLY;
+import static androidx.media3.transformer.TestUtil.createEncodersAndDecoders;
 import static androidx.media3.transformer.TestUtil.createTransformerBuilder;
+import static androidx.media3.transformer.TestUtil.getDumpFileName;
+import static androidx.media3.transformer.TestUtil.removeEncodersAndDecoders;
 import static com.google.common.truth.Truth.assertThat;
 
 import android.content.Context;
 import androidx.media3.common.MediaItem;
 import androidx.media3.common.util.Util;
+import androidx.media3.test.utils.DumpFileAsserts;
 import androidx.media3.transformer.TestUtil.TestMuxerFactory.TestMuxerHolder;
 import androidx.test.core.app.ApplicationProvider;
 import androidx.test.ext.junit.runners.AndroidJUnit4;
@@ -43,19 +51,22 @@ import org.junit.runner.RunWith;
 @RunWith(AndroidJUnit4.class)
 public class CompositionExportTest {
 
+  private Context context;
   private String outputPath;
   private TestMuxerHolder testMuxerHolder;
 
   @Before
   public void setUp() throws Exception {
-    Context context = ApplicationProvider.getApplicationContext();
+    context = ApplicationProvider.getApplicationContext();
     outputPath = Util.createTempFile(context, "TransformerTest").getPath();
-    testMuxerHolder = new TestUtil.TestMuxerFactory.TestMuxerHolder();
+    testMuxerHolder = new TestMuxerHolder();
+    createEncodersAndDecoders();
   }
 
   @After
   public void tearDown() throws Exception {
     Files.delete(Paths.get(outputPath));
+    removeEncodersAndDecoders();
   }
 
   @Test
@@ -150,4 +161,118 @@ public class CompositionExportTest {
     assertThat(exportResult.durationMs).isEqualTo(3108);
     assertThat(exportResult.fileSizeBytes).isEqualTo(337308);
   }
+
+  @Test
+  public void start_loopingRawAudio_producesExpectedResult() throws Exception {
+    Transformer transformer =
+        createTransformerBuilder(testMuxerHolder, /* enableFallback= */ false).build();
+    EditedMediaItemSequence audioSequence =
+        new EditedMediaItemSequence(
+            ImmutableList.of(
+                new EditedMediaItem.Builder(MediaItem.fromUri(ASSET_URI_PREFIX + FILE_AUDIO_RAW))
+                    .build()),
+            /* isLooping= */ true);
+
+    EditedMediaItem videoEditedMediaItem =
+        new EditedMediaItem.Builder(
+                MediaItem.fromUri(ASSET_URI_PREFIX + FILE_AUDIO_VIDEO_INCREASING_TIMESTAMPS_15S))
+            .setRemoveAudio(true)
+            .build();
+    EditedMediaItemSequence videoSequence =
+        new EditedMediaItemSequence(ImmutableList.of(videoEditedMediaItem, videoEditedMediaItem));
+    Composition composition =
+        new Composition.Builder(ImmutableList.of(audioSequence, videoSequence))
+            .setTransmuxVideo(true)
+            .build();
+
+    transformer.start(composition, outputPath);
+    ExportResult exportResult = TransformerTestRunner.runLooper(transformer);
+
+    assertThat(exportResult.durationMs).isEqualTo(31_053);
+    // FILE_AUDIO_RAW duration is 1000ms. Input 32 times to cover the 31_053ms duration.
+    assertThat(exportResult.processedInputs).hasSize(34);
+    assertThat(exportResult.channelCount).isEqualTo(1);
+    assertThat(exportResult.fileSizeBytes).isEqualTo(5292662);
+  }
+
+  @Test
+  public void start_compositionOfConcurrentAudio_isCorrect() throws Exception {
+    Transformer transformer =
+        createTransformerBuilder(testMuxerHolder, /* enableFallback= */ false).build();
+
+    EditedMediaItem rawAudioItem =
+        new EditedMediaItem.Builder(MediaItem.fromUri(ASSET_URI_PREFIX + FILE_AUDIO_RAW)).build();
+    EditedMediaItemSequence firstSequence =
+        new EditedMediaItemSequence(ImmutableList.of(rawAudioItem));
+
+    EditedMediaItemSequence secondSequence =
+        new EditedMediaItemSequence(ImmutableList.of(rawAudioItem));
+
+    transformer.start(
+        new Composition.Builder(ImmutableList.of(firstSequence, secondSequence)).build(),
+        outputPath);
+    ExportResult exportResult = TransformerTestRunner.runLooper(transformer);
+
+    assertThat(exportResult.processedInputs).hasSize(2);
+    DumpFileAsserts.assertOutput(
+        context,
+        checkNotNull(testMuxerHolder.testMuxer),
+        getDumpFileName(FILE_AUDIO_RAW + ".concurrent"));
+  }
+
+  @Test
+  public void start_audioVideoCompositionWithExtraAudio_isCorrect() throws Exception {
+    Transformer transformer =
+        createTransformerBuilder(testMuxerHolder, /* enableFallback= */ false).build();
+    EditedMediaItem audioVideoItem =
+        new EditedMediaItem.Builder(MediaItem.fromUri(ASSET_URI_PREFIX + FILE_AUDIO_RAW_VIDEO))
+            .build();
+    EditedMediaItemSequence audioVideoSeq =
+        new EditedMediaItemSequence(ImmutableList.of(audioVideoItem));
+
+    EditedMediaItem audioItem =
+        new EditedMediaItem.Builder(MediaItem.fromUri(ASSET_URI_PREFIX + FILE_AUDIO_RAW_VIDEO))
+            .setRemoveVideo(true)
+            .build();
+    EditedMediaItemSequence audioSeq = new EditedMediaItemSequence(ImmutableList.of(audioItem));
+
+    transformer.start(
+        new Composition.Builder(ImmutableList.of(audioVideoSeq, audioSeq))
+            .setTransmuxVideo(true)
+            .build(),
+        outputPath);
+    ExportResult exportResult = TransformerTestRunner.runLooper(transformer);
+
+    assertThat(exportResult.processedInputs).hasSize(2);
+    assertThat(exportResult.durationMs).isEqualTo(1984);
+  }
+
+  @Test
+  public void start_audioVideoCompositionWithLoopingAudio_isCorrect() throws Exception {
+    Transformer transformer =
+        createTransformerBuilder(testMuxerHolder, /* enableFallback= */ false).build();
+    EditedMediaItem audioVideoItem =
+        new EditedMediaItem.Builder(MediaItem.fromUri(ASSET_URI_PREFIX + FILE_AUDIO_RAW_VIDEO))
+            .build();
+    EditedMediaItemSequence audioVideoSeq =
+        new EditedMediaItemSequence(
+            ImmutableList.of(audioVideoItem, audioVideoItem, audioVideoItem));
+
+    EditedMediaItem audioItem =
+        new EditedMediaItem.Builder(MediaItem.fromUri(ASSET_URI_PREFIX + FILE_AUDIO_RAW_VIDEO))
+            .setRemoveVideo(true)
+            .build();
+    EditedMediaItemSequence audioSeq =
+        new EditedMediaItemSequence(ImmutableList.of(audioItem), /* isLooping= */ true);
+
+    transformer.start(
+        new Composition.Builder(ImmutableList.of(audioVideoSeq, audioSeq))
+            .setTransmuxVideo(true)
+            .build(),
+        outputPath);
+    ExportResult exportResult = TransformerTestRunner.runLooper(transformer);
+
+    assertThat(exportResult.processedInputs).hasSize(7);
+    assertThat(exportResult.durationMs).isEqualTo(5984);
+  }
 }