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Merge pull request #2683 from tylerjroach/dev-v2

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Added mp3 support to FLV extractor
This commit is contained in:
ojw28 2017-04-21 17:57:18 +01:00 committed by GitHub
commit 5381b4ec56
1 changed files with 33 additions and 15 deletions
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48
library/core/src/main/java/com/google/android/exoplayer2/extractor/flv/AudioTagPayloadReader.java
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@ -15,6 +15,7 @@
*/
package com.google.android.exoplayer2.extractor.flv;
import android.util.Log;
import android.util.Pair;
import com.google.android.exoplayer2.C;
import com.google.android.exoplayer2.Format;
@ -29,6 +30,7 @@ import java.util.Collections;
*/
/* package */ final class AudioTagPayloadReader extends TagPayloadReader {
private static final int AUDIO_FORMAT_MP3 = 2;
private static final int AUDIO_FORMAT_ALAW = 7;
private static final int AUDIO_FORMAT_ULAW = 8;
private static final int AUDIO_FORMAT_AAC = 10;
@ -36,6 +38,11 @@ import java.util.Collections;
private static final int AAC_PACKET_TYPE_SEQUENCE_HEADER = 0;
private static final int AAC_PACKET_TYPE_AAC_RAW = 1;
// SAMPLING RATES USED FOR MP3
private static final int[] AUDIO_SAMPLING_RATE_TABLE = new int[] {
5512, 11025, 22050, 44100
};
// State variables
private boolean hasParsedAudioDataHeader;
private boolean hasOutputFormat;
@ -55,8 +62,14 @@ import java.util.Collections;
if (!hasParsedAudioDataHeader) {
int header = data.readUnsignedByte();
audioFormat = (header >> 4) & 0x0F;
// TODO: Add support for MP3.
if (audioFormat == AUDIO_FORMAT_ALAW || audioFormat == AUDIO_FORMAT_ULAW) {
if (audioFormat == AUDIO_FORMAT_MP3) {
int sampleRateIndex = (header >> 2) & 0x03;
int sampleRate = AUDIO_SAMPLING_RATE_TABLE[sampleRateIndex];
Format format = Format.createAudioSampleFormat(null, MimeTypes.AUDIO_MPEG, null,
Format.NO_VALUE, Format.NO_VALUE, 1, sampleRate, null, null, 0, null);
output.format(format);
hasOutputFormat = true;
} else if (audioFormat == AUDIO_FORMAT_ALAW || audioFormat == AUDIO_FORMAT_ULAW) {
String type = audioFormat == AUDIO_FORMAT_ALAW ? MimeTypes.AUDIO_ALAW
: MimeTypes.AUDIO_ULAW;
int pcmEncoding = (header & 0x01) == 1 ? C.ENCODING_PCM_16BIT : C.ENCODING_PCM_8BIT;
@ -77,22 +90,27 @@ import java.util.Collections;
@Override
protected void parsePayload(ParsableByteArray data, long timeUs) {
int packetType = data.readUnsignedByte();
if (packetType == AAC_PACKET_TYPE_SEQUENCE_HEADER && !hasOutputFormat) {
// Parse the sequence header.
byte[] audioSpecificConfig = new byte[data.bytesLeft()];
data.readBytes(audioSpecificConfig, 0, audioSpecificConfig.length);
Pair<Integer, Integer> audioParams = CodecSpecificDataUtil.parseAacAudioSpecificConfig(
audioSpecificConfig);
Format format = Format.createAudioSampleFormat(null, MimeTypes.AUDIO_AAC, null,
Format.NO_VALUE, Format.NO_VALUE, audioParams.second, audioParams.first,
Collections.singletonList(audioSpecificConfig), null, 0, null);
output.format(format);
hasOutputFormat = true;
} else if (audioFormat != AUDIO_FORMAT_AAC || packetType == AAC_PACKET_TYPE_AAC_RAW) {
if (audioFormat == AUDIO_FORMAT_MP3) {
int sampleSize = data.bytesLeft();
output.sampleData(data, sampleSize);
output.sampleMetadata(timeUs, C.BUFFER_FLAG_KEY_FRAME, sampleSize, 0, null);
} else {
int packetType = data.readUnsignedByte();
if (packetType == AAC_PACKET_TYPE_SEQUENCE_HEADER && !hasOutputFormat) {
// Parse the sequence header.
byte[] audioSpecificConfig = new byte[data.bytesLeft()];
data.readBytes(audioSpecificConfig, 0, audioSpecificConfig.length);
Pair<Integer, Integer> audioParams = CodecSpecificDataUtil.parseAacAudioSpecificConfig(audioSpecificConfig);
Format format =
Format.createAudioSampleFormat(null, MimeTypes.AUDIO_AAC, null, Format.NO_VALUE, Format.NO_VALUE, audioParams.second, audioParams.first,
Collections.singletonList(audioSpecificConfig), null, 0, null);
output.format(format);
hasOutputFormat = true;
} else if (audioFormat != AUDIO_FORMAT_AAC || packetType == AAC_PACKET_TYPE_AAC_RAW) {
int sampleSize = data.bytesLeft();
output.sampleData(data, sampleSize);
output.sampleMetadata(timeUs, C.BUFFER_FLAG_KEY_FRAME, sampleSize, 0, null);
}
}
}