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Remove incorrect AudioTrack timestamp adjustment.

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This is just wrong. I think there used to be an off-by-one
timestamp error in YouTube's fmp4 streams, and this code
was initially designed exclusively to play such streams. I
don't see this issue any more though, if it was ever there!
-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=120447694
This commit is contained in:
olly 2016-04-21 08:50:24 -07:00 committed by Oliver Woodman
parent e390bdf98c
commit b1de997388
1 changed files with 8 additions and 11 deletions
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19
library/src/main/java/com/google/android/exoplayer/audio/AudioTrack.java
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@ -579,26 +579,23 @@ public final class AudioTrack {
// If this is the first encoded sample, calculate the sample size in frames.
framesPerEncodedSample = getFramesPerEncodedSample(encoding, buffer);
}
long frames = passthrough ? framesPerEncodedSample : pcmBytesToFrames(size);
long bufferDurationUs = framesToDurationUs(frames);
// Note: presentationTimeUs corresponds to the end of the sample, not the start.
long bufferStartTime = presentationTimeUs - bufferDurationUs;
if (startMediaTimeState == START_NOT_SET) {
startMediaTimeUs = Math.max(0, bufferStartTime);
startMediaTimeUs = Math.max(0, presentationTimeUs);
startMediaTimeState = START_IN_SYNC;
} else {
// Sanity check that bufferStartTime is consistent with the expected value.
long expectedBufferStartTime = startMediaTimeUs + framesToDurationUs(getSubmittedFrames());
// Sanity check that presentationTimeUs is consistent with the expected value.
long expectedPresentationTimeUs = startMediaTimeUs
+ framesToDurationUs(getSubmittedFrames());
if (startMediaTimeState == START_IN_SYNC
&& Math.abs(expectedBufferStartTime - bufferStartTime) > 200000) {
Log.e(TAG, "Discontinuity detected [expected " + expectedBufferStartTime + ", got "
+ bufferStartTime + "]");
&& Math.abs(expectedPresentationTimeUs - presentationTimeUs) > 200000) {
Log.e(TAG, "Discontinuity detected [expected " + expectedPresentationTimeUs + ", got "
+ presentationTimeUs + "]");
startMediaTimeState = START_NEED_SYNC;
}
if (startMediaTimeState == START_NEED_SYNC) {
// Adjust startMediaTimeUs to be consistent with the current buffer's start time and the
// number of bytes submitted.
startMediaTimeUs += (bufferStartTime - expectedBufferStartTime);
startMediaTimeUs += (presentationTimeUs - expectedPresentationTimeUs);
startMediaTimeState = START_IN_SYNC;
result |= RESULT_POSITION_DISCONTINUITY;
}