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Comment (e-)AC-3/DTS descriptor tags.

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Also, use terminology from ATSC spec in Ac3Util comment.
-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=112254908
This commit is contained in:
andrewlewis 2016-01-15 09:14:19 -08:00 committed by Oliver Woodman
parent 0900c53564
commit 284b7e7f28
2 changed files with 10 additions and 6 deletions
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14
library/src/main/java/com/google/android/exoplayer/extractor/ts/TsExtractor.java
View file

@ -46,6 +46,7 @@ public final class TsExtractor implements Extractor {
private static final int TS_STREAM_TYPE_MPA_LSF = 0x04;
private static final int TS_STREAM_TYPE_AAC = 0x0F;
private static final int TS_STREAM_TYPE_AC3 = 0x81;
private static final int TS_STREAM_TYPE_DTS = 0x8A;
private static final int TS_STREAM_TYPE_E_AC3 = 0x87;
private static final int TS_STREAM_TYPE_H262 = 0x02;
private static final int TS_STREAM_TYPE_H264 = 0x1B;
@ -326,7 +327,7 @@ public final class TsExtractor implements Extractor {
continue;
}
ElementaryStreamReader pesPayloadReader = null;
ElementaryStreamReader pesPayloadReader;
switch (streamType) {
case TS_STREAM_TYPE_MPA:
pesPayloadReader = new MpegAudioReader(output.track(TS_STREAM_TYPE_MPA));
@ -358,6 +359,9 @@ public final class TsExtractor implements Extractor {
case TS_STREAM_TYPE_ID3:
pesPayloadReader = id3Reader;
break;
default:
pesPayloadReader = null;
break;
}
if (pesPayloadReader != null) {
@ -394,12 +398,12 @@ public final class TsExtractor implements Extractor {
streamType = TS_STREAM_TYPE_H265;
}
break;
} else if (descriptorTag == 0x6A) {
} else if (descriptorTag == 0x6A) { // AC-3_descriptor in DVB (ETSI EN 300 468)
streamType = TS_STREAM_TYPE_AC3;
} else if (descriptorTag == 0x7A) {
} else if (descriptorTag == 0x7A) { // enhanced_AC-3_descriptor
streamType = TS_STREAM_TYPE_E_AC3;
} else if (descriptorTag == 0x7B) {
// TODO: TS_STREAM_TYPE_DTS;
} else if (descriptorTag == 0x7B) { // DTS_descriptor
streamType = TS_STREAM_TYPE_DTS;
}
data.skipBytes(descriptorLength);

2
library/src/main/java/com/google/android/exoplayer/util/Ac3Util.java
View file

@ -152,7 +152,7 @@ public final class Ac3Util {
*/
public static MediaFormat parseEac3SyncframeFormat(ParsableBitArray data, String trackId,
long durationUs, String language) {
data.skipBits(16 + 2 + 3 + 11); // syncword, strmtype, strmid, frmsiz
data.skipBits(16 + 2 + 3 + 11); // syncword, strmtype, substreamid, frmsiz
int sampleRate;
int fscod = data.readBits(2);
if (fscod == 3) {