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Merge pull request #2326 from devint1/alac-dev

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Apple Lossless (ALAC) support
This commit is contained in:
ojw28 2017-01-30 18:44:47 +00:00 committed by GitHub
commit a7dd0f7609
6 changed files with 21 additions and 1 deletions
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1
extensions/ffmpeg/README.md
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@ -63,6 +63,7 @@ git clone git://source.ffmpeg.org/ffmpeg ffmpeg && cd ffmpeg && \
--enable-decoder=vorbis \
--enable-decoder=opus \
--enable-decoder=flac \
--enable-decoder=alac \
&& \
make -j4 && \
make install-libs

9
extensions/ffmpeg/src/main/java/com/google/android/exoplayer2/ext/ffmpeg/FfmpegDecoder.java
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@ -19,6 +19,7 @@ import com.google.android.exoplayer2.decoder.DecoderInputBuffer;
import com.google.android.exoplayer2.decoder.SimpleDecoder;
import com.google.android.exoplayer2.decoder.SimpleOutputBuffer;
import com.google.android.exoplayer2.util.MimeTypes;
import com.google.android.exoplayer2.util.ParsableByteArray;
import java.nio.ByteBuffer;
import java.util.List;
@ -88,6 +89,13 @@ import java.util.List;
if (!hasOutputFormat) {
channelCount = ffmpegGetChannelCount(nativeContext);
sampleRate = ffmpegGetSampleRate(nativeContext);
if (sampleRate == 0 && "alac".equals(codecName)) {
// ALAC decoder did not set the sample rate in earlier versions of FFMPEG.
// See https://trac.ffmpeg.org/ticket/6096
ParsableByteArray parsableExtraData = new ParsableByteArray(extraData);
parsableExtraData.setPosition(extraData.length - 4);
sampleRate = parsableExtraData.readUnsignedIntToInt();
}
hasOutputFormat = true;
}
outputBuffer.data.position(0);
@ -123,6 +131,7 @@ import java.util.List;
private static byte[] getExtraData(String mimeType, List<byte[]> initializationData) {
switch (mimeType) {
case MimeTypes.AUDIO_AAC:
case MimeTypes.AUDIO_ALAC:
case MimeTypes.AUDIO_OPUS:
return initializationData.get(0);
case MimeTypes.AUDIO_VORBIS:

2
extensions/ffmpeg/src/main/java/com/google/android/exoplayer2/ext/ffmpeg/FfmpegLibrary.java
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@ -92,6 +92,8 @@ public final class FfmpegLibrary {
return "amrwb";
case MimeTypes.AUDIO_FLAC:
return "flac";
case MimeTypes.AUDIO_ALAC:
return "alac";
default:
return null;
}

1
library/src/main/java/com/google/android/exoplayer2/extractor/mp4/Atom.java
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@ -135,6 +135,7 @@ import java.util.List;
public static final int TYPE_vp09 = Util.getIntegerCodeForString("vp09");
public static final int TYPE_vpcC = Util.getIntegerCodeForString("vpcC");
public static final int TYPE_camm = Util.getIntegerCodeForString("camm");
public static final int TYPE_alac = Util.getIntegerCodeForString("alac");
public final int type;

8
library/src/main/java/com/google/android/exoplayer2/extractor/mp4/AtomParsers.java
View File

@ -604,7 +604,7 @@ import java.util.List;
|| childAtomType == Atom.TYPE_dtsh || childAtomType == Atom.TYPE_dtsl
|| childAtomType == Atom.TYPE_samr || childAtomType == Atom.TYPE_sawb
|| childAtomType == Atom.TYPE_lpcm || childAtomType == Atom.TYPE_sowt
|| childAtomType == Atom.TYPE__mp3) {
|| childAtomType == Atom.TYPE__mp3 || childAtomType == Atom.TYPE_alac) {
parseAudioSampleEntry(stsd, childAtomType, childStartPosition, childAtomSize, trackId,
language, isQuickTime, drmInitData, out, i);
} else if (childAtomType == Atom.TYPE_TTML) {
@ -839,6 +839,8 @@ import java.util.List;
mimeType = MimeTypes.AUDIO_RAW;
} else if (atomType == Atom.TYPE__mp3) {
mimeType = MimeTypes.AUDIO_MPEG;
} else if (atomType == Atom.TYPE_alac) {
mimeType = MimeTypes.AUDIO_ALAC;
}
byte[] initializationData = null;
@ -876,6 +878,10 @@ import java.util.List;
out.format = Format.createAudioSampleFormat(Integer.toString(trackId), mimeType, null,
Format.NO_VALUE, Format.NO_VALUE, channelCount, sampleRate, null, drmInitData, 0,
language);
} else if (childAtomType == Atom.TYPE_alac) {
initializationData = new byte[childAtomSize];
parent.setPosition(childPosition);
parent.readBytes(initializationData, 0, childAtomSize);
}
childPosition += childAtomSize;
}

1
library/src/main/java/com/google/android/exoplayer2/util/MimeTypes.java
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@ -60,6 +60,7 @@ public final class MimeTypes {
public static final String AUDIO_AMR_NB = BASE_TYPE_AUDIO + "/3gpp";
public static final String AUDIO_AMR_WB = BASE_TYPE_AUDIO + "/amr-wb";
public static final String AUDIO_FLAC = BASE_TYPE_AUDIO + "/x-flac";
public static final String AUDIO_ALAC = BASE_TYPE_AUDIO + "/alac";
public static final String TEXT_VTT = BASE_TYPE_TEXT + "/vtt";