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Commit 727aded3 by michaelkatz Committed by Tianyi Feng
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Prepend Ogg ID and Comment Header Pages to offloaded Opus stream 

Add Ogg ID Header and Comment Header Pages to the Ogg encapsulated Opus for offload playback. This further matches the RFC 7845 spec and provides initialization data to decoders.

PiperOrigin-RevId: 548080222
(cherry picked from commit 4c894aa6a961fb53e92bf01361f8459d65055af3)
parent 1e93c828
Inline Side-by-side
Showing with 312 additions and 51 deletions
library/core/src/main/java/com/google/android/exoplayer2/audio/OggOpusAudioPacketizer.java
......@@ -18,13 +18,16 @@ package com.google.android.exoplayer2.audio;
import static com.google.android.exoplayer2.audio.AudioProcessor.EMPTY_BUFFER;
import static com.google.android.exoplayer2.util.Assertions.checkNotNull;
import androidx.annotation.Nullable;
import com.google.android.exoplayer2.decoder.DecoderInputBuffer;
import com.google.android.exoplayer2.util.Util;
import com.google.common.primitives.UnsignedBytes;
import java.nio.ByteBuffer;
import java.nio.ByteOrder;
import java.util.List;
/**
* A packetizer that encapsulates OPUS audio encodings in OGG packets.
* A packetizer that encapsulates Opus audio encodings in Ogg packets.
*
* @deprecated com.google.android.exoplayer2 is deprecated. Please migrate to androidx.media3 (which
* contains the same ExoPlayer code). See <a
......@@ -34,8 +37,23 @@ import java.nio.ByteOrder;
@Deprecated
public final class OggOpusAudioPacketizer {
private static final int CHECKSUM_INDEX = 22;
/** ID Header and Comment Header pages are 0 and 1 respectively */
private static final int FIRST_AUDIO_SAMPLE_PAGE_SEQUENCE = 2;
private static final int FIRST_AUDIO_SAMPLE_PAGE_SEQUENCE_NUMBER = 2;
private static final int OGG_PACKET_HEADER_LENGTH = 28;
private static final int SERIAL_NUMBER = 0;
private static final byte[] OGG_DEFAULT_ID_HEADER_PAGE =
new byte[] {
79, 103, 103, 83, 0, 2, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 28, -43, -59, -9, 1,
19, 79, 112, 117, 115, 72, 101, 97, 100, 1, 2, 56, 1, -128, -69, 0, 0, 0, 0, 0
};
private static final byte[] OGG_DEFAULT_COMMENT_HEADER_PAGE =
new byte[] {
79, 103, 103, 83, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 11, -103, 87, 83, 1,
16, 79, 112, 117, 115, 84, 97, 103, 115, 0, 0, 0, 0, 0, 0, 0, 0
};
private ByteBuffer outputBuffer;
private int pageSequenceNumber;
......@@ -45,7 +63,7 @@ public final class OggOpusAudioPacketizer {
public OggOpusAudioPacketizer() {
outputBuffer = EMPTY_BUFFER;
granulePosition = 0;
pageSequenceNumber = FIRST_AUDIO_SAMPLE_PAGE_SEQUENCE;
pageSequenceNumber = FIRST_AUDIO_SAMPLE_PAGE_SEQUENCE_NUMBER;
}
/**
......@@ -54,13 +72,23 @@ public final class OggOpusAudioPacketizer {
* @param inputBuffer The input buffer to packetize. It must be a direct {@link ByteBuffer} with
* LITTLE_ENDIAN order. The contents will be overwritten with the Ogg packet. The caller
* retains ownership of the provided buffer.
* @param initializationData contains set-up data for the Opus Decoder. The data will be provided
* in an Ogg ID Header Page prepended to the bitstream. The list should contain either one or
* three byte arrays. The first item is the payload for the Ogg ID Header Page. If three
* items, then it also contains the Opus pre-skip and seek pre-roll values in that order.
*/
public void packetize(DecoderInputBuffer inputBuffer) {
public void packetize(DecoderInputBuffer inputBuffer, List<byte[]> initializationData) {
checkNotNull(inputBuffer.data);
if (inputBuffer.data.limit() - inputBuffer.data.position() == 0) {
return;
}
outputBuffer = packetizeInternal(inputBuffer.data);
@Nullable
byte[] providedOggIdHeaderPayloadBytes =
pageSequenceNumber == FIRST_AUDIO_SAMPLE_PAGE_SEQUENCE_NUMBER
&& (initializationData.size() == 1 || initializationData.size() == 3)
? initializationData.get(0)
: null;
outputBuffer = packetizeInternal(inputBuffer.data, providedOggIdHeaderPayloadBytes);
inputBuffer.clear();
inputBuffer.ensureSpaceForWrite(outputBuffer.remaining());
inputBuffer.data.put(outputBuffer);
......@@ -71,16 +99,24 @@ public final class OggOpusAudioPacketizer {
public void reset() {
outputBuffer = EMPTY_BUFFER;
granulePosition = 0;
pageSequenceNumber = FIRST_AUDIO_SAMPLE_PAGE_SEQUENCE;
pageSequenceNumber = FIRST_AUDIO_SAMPLE_PAGE_SEQUENCE_NUMBER;
}
/**
* Fill outputBuffer with an Ogg packet encapsulating the inputBuffer.
*
* @param inputBuffer contains Opus to wrap in Ogg packet
* <p>If {@code providedOggIdHeaderPayloadBytes} is {@code null} and {@link #pageSequenceNumber}
* is {@link #FIRST_AUDIO_SAMPLE_PAGE_SEQUENCE_NUMBER}, then {@link #OGG_DEFAULT_ID_HEADER_PAGE}
* will be prepended to the Ogg Opus Audio packets for the Ogg ID Header Page.
*
* @param inputBuffer contains Opus to wrap in Ogg packet.
* @param providedOggIdHeaderPayloadBytes containing the Ogg ID Header Page payload. Expected to
* be {@code null} if {@link #pageSequenceNumber} is not {@link
* #FIRST_AUDIO_SAMPLE_PAGE_SEQUENCE_NUMBER}.
* @return {@link ByteBuffer} containing Ogg packet
*/
private ByteBuffer packetizeInternal(ByteBuffer inputBuffer) {
private ByteBuffer packetizeInternal(
ByteBuffer inputBuffer, @Nullable byte[] providedOggIdHeaderPayloadBytes) {
int position = inputBuffer.position();
int limit = inputBuffer.limit();
int inputBufferSize = limit - position;
......@@ -91,38 +127,37 @@ public final class OggOpusAudioPacketizer {
int outputPacketSize = headerSize + inputBufferSize;
// If first audio sample in stream, then the packetizer will add Ogg ID Header and Comment
// Header Pages. Include additional page lengths in buffer size calculation.
int oggIdHeaderPageSize = 0;
if (pageSequenceNumber == FIRST_AUDIO_SAMPLE_PAGE_SEQUENCE_NUMBER) {
oggIdHeaderPageSize =
providedOggIdHeaderPayloadBytes != null
? OGG_PACKET_HEADER_LENGTH + providedOggIdHeaderPayloadBytes.length
: OGG_DEFAULT_ID_HEADER_PAGE.length;
outputPacketSize += oggIdHeaderPageSize + OGG_DEFAULT_COMMENT_HEADER_PAGE.length;
}
// Resample the little endian input and update the output buffers.
ByteBuffer buffer = replaceOutputBuffer(outputPacketSize);
// Capture Pattern for Page [OggS]
buffer.put((byte) 'O');
buffer.put((byte) 'g');
buffer.put((byte) 'g');
buffer.put((byte) 'S');
// StreamStructure Version
buffer.put((byte) 0);
// header_type_flag
buffer.put((byte) 0x00);
// If first audio sample in stream then insert Ogg ID Header and Comment Header Pages
if (pageSequenceNumber == FIRST_AUDIO_SAMPLE_PAGE_SEQUENCE_NUMBER) {
if (providedOggIdHeaderPayloadBytes != null) {
writeOggIdHeaderPage(buffer, /* idHeaderPayloadBytes= */ providedOggIdHeaderPayloadBytes);
} else {
// Write default Ogg ID Header Payload
buffer.put(OGG_DEFAULT_ID_HEADER_PAGE);
}
buffer.put(OGG_DEFAULT_COMMENT_HEADER_PAGE);
}
// granule_position
int numSamples = OpusUtil.parsePacketAudioSampleCount(inputBuffer);
granulePosition += numSamples;
buffer.putLong(granulePosition);
// bitstream_serial_number
buffer.putInt(0);
// page_sequence_number
buffer.putInt(pageSequenceNumber);
pageSequenceNumber++;
// CRC_checksum
buffer.putInt(0);
// number_page_segments
buffer.put((byte) numSegments);
writeOggPacketHeader(
buffer, granulePosition, pageSequenceNumber, numSegments, /* isIdHeaderPacket= */ false);
// Segment_table
int bytesLeft = inputBufferSize;
......@@ -136,6 +171,7 @@ public final class OggOpusAudioPacketizer {
}
}
// Write Opus audio data
for (int i = position; i < limit; i++) {
buffer.put(inputBuffer.get(i));
}
......@@ -143,19 +179,106 @@ public final class OggOpusAudioPacketizer {
inputBuffer.position(inputBuffer.limit());
buffer.flip();
int checksum =
int checksum;
if (pageSequenceNumber == FIRST_AUDIO_SAMPLE_PAGE_SEQUENCE_NUMBER) {
checksum =
Util.crc32(
buffer.array(),
/* start= */ buffer.arrayOffset()
+ oggIdHeaderPageSize
+ OGG_DEFAULT_COMMENT_HEADER_PAGE.length,
/* end= */ buffer.limit() - buffer.position(),
/* initialValue= */ 0);
buffer.putInt(
oggIdHeaderPageSize + OGG_DEFAULT_COMMENT_HEADER_PAGE.length + CHECKSUM_INDEX, checksum);
} else {
checksum =
Util.crc32(
buffer.array(),
buffer.arrayOffset(),
buffer.limit() - buffer.position(),
/* start= */ buffer.arrayOffset(),
/* end= */ buffer.limit() - buffer.position(),
/* initialValue= */ 0);
buffer.putInt(22, checksum);
buffer.position(0);
buffer.putInt(CHECKSUM_INDEX, checksum);
}
// Increase pageSequenceNumber for next packet
pageSequenceNumber++;
return buffer;
}
/**
* Write Ogg ID Header Page packet to {@link ByteBuffer}.
*
* @param buffer to write into.
* @param idHeaderPayloadBytes containing the Ogg ID Header Page payload.
*/
private void writeOggIdHeaderPage(ByteBuffer buffer, byte[] idHeaderPayloadBytes) {
// TODO(b/290195621): Use starting position to calculate correct 'pre-skip' value
writeOggPacketHeader(
buffer,
/* granulePosition= */ 0,
/* pageSequenceNumber= */ 0,
/* numberPageSegments= */ 1,
/* isIdHeaderPacket= */ true);
buffer.put(UnsignedBytes.checkedCast(idHeaderPayloadBytes.length));
buffer.put(idHeaderPayloadBytes);
int checksum =
Util.crc32(
buffer.array(),
/* start= */ buffer.arrayOffset(),
/* end= */ OGG_PACKET_HEADER_LENGTH + idHeaderPayloadBytes.length,
/* initialValue= */ 0);
buffer.putInt(/* index= */ CHECKSUM_INDEX, checksum);
buffer.position(OGG_PACKET_HEADER_LENGTH + idHeaderPayloadBytes.length);
}
/**
* Write header for an Ogg Page Packet to {@link ByteBuffer}.
*
* @param byteBuffer to write unto.
* @param granulePosition is the number of audio samples in the stream up to and including this
* packet.
* @param pageSequenceNumber of the page this header is for.
* @param numberPageSegments the data of this Ogg page will span.
* @param isIdHeaderPacket where if this header is start of the bitstream.
*/
private void writeOggPacketHeader(
ByteBuffer byteBuffer,
long granulePosition,
int pageSequenceNumber,
int numberPageSegments,
boolean isIdHeaderPacket) {
// Capture Pattern for Ogg Page [OggS]
byteBuffer.put((byte) 'O');
byteBuffer.put((byte) 'g');
byteBuffer.put((byte) 'g');
byteBuffer.put((byte) 'S');
// StreamStructure Version
byteBuffer.put((byte) 0);
// Header-type
byteBuffer.put(isIdHeaderPacket ? (byte) 0x02 : (byte) 0x00);
// Granule_position
byteBuffer.putLong(granulePosition);
// bitstream_serial_number
byteBuffer.putInt(SERIAL_NUMBER);
// Page_sequence_number
byteBuffer.putInt(pageSequenceNumber);
// CRC_checksum
// Will be overwritten with calculated checksum after rest of page is written to buffer.
byteBuffer.putInt(0);
// Number_page_segments
byteBuffer.put(UnsignedBytes.checkedCast(numberPageSegments));
}
/**
* Replaces the current output buffer with a buffer of at least {@code size} bytes and returns it.
* Callers should write to the returned buffer then {@link ByteBuffer#flip()} it so it can be read
* via buffer.
......
library/core/src/main/java/com/google/android/exoplayer2/mediacodec/MediaCodecRenderer.java
......@@ -709,6 +709,7 @@ public abstract class MediaCodecRenderer extends BaseRenderer {
bypassBatchBuffer.clear();
bypassSampleBuffer.clear();
bypassSampleBufferPending = false;
oggOpusAudioPacketizer.reset();
} else {
flushOrReinitializeCodec();
}
......@@ -2338,7 +2339,7 @@ public abstract class MediaCodecRenderer extends BaseRenderer {
if (inputFormat != null
&& inputFormat.sampleMimeType != null
&& inputFormat.sampleMimeType.equals(MimeTypes.AUDIO_OPUS)) {
oggOpusAudioPacketizer.packetize(bypassSampleBuffer);
oggOpusAudioPacketizer.packetize(bypassSampleBuffer, inputFormat.initializationData);
}
if (!bypassBatchBuffer.append(bypassSampleBuffer)) {
......
library/extractor/src/main/java/com/google/android/exoplayer2/audio/OpusUtil.java
......@@ -82,16 +82,46 @@ public class OpusUtil {
*/
public static int parseOggPacketAudioSampleCount(ByteBuffer buffer) {
// RFC 3433 section 6 - The Ogg page format.
int numPageSegments = buffer.get(/* index= */ 26);
int indexFirstOpusPacket = 27 + numPageSegments; // Skip Ogg header and segment table.
int preAudioPacketByteCount = parseOggPacketForPreAudioSampleByteCount(buffer);
int numPageSegments = buffer.get(/* index= */ 26 + preAudioPacketByteCount);
// Skip Ogg header + segment table.
int indexFirstOpusPacket = 27 + numPageSegments + preAudioPacketByteCount;
long packetDurationUs =
getPacketDurationUs(
buffer.get(indexFirstOpusPacket),
buffer.limit() > 1 ? buffer.get(indexFirstOpusPacket + 1) : 0);
buffer.limit() - indexFirstOpusPacket > 1 ? buffer.get(indexFirstOpusPacket + 1) : 0);
return (int) (packetDurationUs * SAMPLE_RATE / C.MICROS_PER_SECOND);
}
/**
* Calculate the offset from the start of the buffer to audio sample Ogg packets.
*
* @param buffer containing the Ogg Encapsulated Opus audio bitstream.
* @return the offset before the Ogg packet containing audio samples.
*/
public static int parseOggPacketForPreAudioSampleByteCount(ByteBuffer buffer) {
// Parse Ogg Packet Type from Header at index 5
if ((buffer.get(/* index= */ 5) & 0x02) == 0) {
// Ogg Page packet header type is not beginning of logical stream. Must be an Audio page.
return 0;
}
// ID Header Page size is Ogg packet header size + sum(lacing values: 1..number_page_segments).
int idHeaderPageSize = 28;
int idHeaderPageNumOfSegments = buffer.get(/* index= */ 26);
for (int i = 0; i < idHeaderPageNumOfSegments; i++) {
idHeaderPageSize += buffer.get(/* index= */ 27 + i);
}
// Comment Header Page size is Ogg packet header size + sum(lacing values:
// 1..number_page_segments).
int commentHeaderPageSize = 28;
int commentHeaderPageSizeNumOfSegments = buffer.get(/* index= */ idHeaderPageSize + 26);
for (int i = 0; i < commentHeaderPageSizeNumOfSegments; i++) {
commentHeaderPageSize += buffer.get(/* index= */ idHeaderPageSize + 27 + i);
}
return idHeaderPageSize + commentHeaderPageSize;
}
/**
* Returns the number of audio samples in the given audio packet.
*
* <p>The buffer's position is not modified.
......
library/extractor/src/test/java/com/google/android/exoplayer2/audio/OpusUtilTest.java
......@@ -20,6 +20,7 @@ import static com.google.common.truth.Truth.assertThat;
import androidx.test.ext.junit.runners.AndroidJUnit4;
import com.google.android.exoplayer2.C;
import com.google.common.primitives.Bytes;
import java.nio.ByteBuffer;
import java.nio.ByteOrder;
import java.util.List;
......@@ -30,35 +31,141 @@ import org.junit.runner.RunWith;
@RunWith(AndroidJUnit4.class)
public final class OpusUtilTest {
private static final byte[] HEADER =
new byte[] {79, 112, 117, 115, 72, 101, 97, 100, 0, 2, 1, 56, 0, 0, -69, -128, 0, 0, 0};
/** Ogg Packet Header in accordance with RFC 3533 for an Ogg ID Header Page. */
private static final byte[] OGG_ID_HEADER_PACKET_HEADER =
new byte[] {
79, 103, 103, 83, 0, 2, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 28, -43, -59, -9, 1,
19
};
private static final int HEADER_PRE_SKIP_SAMPLES = 14337;
private static final byte[] HEADER_PRE_SKIP_BYTES =
buildNativeOrderByteArray(sampleCountToNanoseconds(HEADER_PRE_SKIP_SAMPLES));
/** Payload for Ogg ID Header Page in accordance with RFC 7845. */
private static final byte[] OGG_ID_HEADER_PAYLOAD =
new byte[] {79, 112, 117, 115, 72, 101, 97, 100, 1, 2, 56, 1, -128, -69, 0, 0, 0, 0, 0};
private static final int OGG_ID_HEADER_PRE_SKIP_SAMPLES = 312;
private static final byte[] OGG_ID_HEADER_PRE_SKIP_BYTES =
buildNativeOrderByteArray(sampleCountToNanoseconds(OGG_ID_HEADER_PRE_SKIP_SAMPLES));
private static final int DEFAULT_SEEK_PRE_ROLL_SAMPLES = 3840;
private static final byte[] DEFAULT_SEEK_PRE_ROLL_BYTES =
buildNativeOrderByteArray(sampleCountToNanoseconds(DEFAULT_SEEK_PRE_ROLL_SAMPLES));
/** Ogg Packet Header in accordance with RFC 3533 for an Ogg Comment Header Page. */
private static final byte[] OGG_COMMENT_HEADER_PACKET_HEADER =
new byte[] {
79, 103, 103, 83, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 11, -103, 87, 83, 1,
16
};
/** Payload for Ogg Comment Header Page with empty vendor and comment sections. */
private static final byte[] OGG_COMMENT_HEADER_PACKET_PAYLOAD =
new byte[] {79, 112, 117, 115, 84, 97, 103, 115, 0, 0, 0, 0, 0, 0, 0, 0};
/** Ogg Packet Header for an page of an Opus audio sample contained in a single segment. */
private static final byte[] OGG_OPUS_PACKET_HEADER_SINGLE_SEGMENT =
new byte[] {
79, 103, 103, 83, 0, 0, -32, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 2, 0, 0, 0, 54, -31, -124, 22,
1, -22
};
/** Ogg Packet Header for an page of an Opus audio sample that takes up multiple segments. */
private static final byte[] OGG_OPUS_PACKET_HEADER_MULTIPLE_SEGMENTS =
new byte[] {
79, 103, 103, 83, 0, 0, -32, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 2, 0, 0, 0, 54, -31, -124, 22,
2, -1, -22
};
private static final byte[] OGG_OPUS_PACKET_PAYLOAD_CODE_ZERO_TOC = getBytesFromHexString("04");
private static final byte[] OGG_OPUS_PACKET_PAYLOAD_CODE_THREE_TOC =
getBytesFromHexString("078C");
@Test
public void buildInitializationData_returnsExpectedHeaderWithPreSkipAndPreRoll() {
List<byte[]> initializationData = OpusUtil.buildInitializationData(HEADER);
List<byte[]> initializationData = OpusUtil.buildInitializationData(OGG_ID_HEADER_PAYLOAD);
assertThat(initializationData).hasSize(3);
assertThat(initializationData.get(0)).isEqualTo(HEADER);
assertThat(initializationData.get(1)).isEqualTo(HEADER_PRE_SKIP_BYTES);
assertThat(initializationData.get(0)).isEqualTo(OGG_ID_HEADER_PAYLOAD);
assertThat(initializationData.get(1)).isEqualTo(OGG_ID_HEADER_PRE_SKIP_BYTES);
assertThat(initializationData.get(2)).isEqualTo(DEFAULT_SEEK_PRE_ROLL_BYTES);
}
@Test
public void getChannelCount_returnsChannelCount() {
int channelCount = OpusUtil.getChannelCount(HEADER);
int channelCount = OpusUtil.getChannelCount(OGG_ID_HEADER_PAYLOAD);
assertThat(channelCount).isEqualTo(2);
}
@Test
public void parseOggPacketForPreAudioSampleByteCount_returnsExpectedByteCount() {
byte[] packetData =
Bytes.concat(
OGG_ID_HEADER_PACKET_HEADER,
OGG_ID_HEADER_PAYLOAD,
OGG_COMMENT_HEADER_PACKET_HEADER,
OGG_COMMENT_HEADER_PACKET_PAYLOAD,
OGG_OPUS_PACKET_HEADER_SINGLE_SEGMENT,
OGG_OPUS_PACKET_PAYLOAD_CODE_ZERO_TOC);
ByteBuffer preAudioOggPacketsByteBuffer = ByteBuffer.wrap(packetData);
int preAudioSampleByteCount =
OpusUtil.parseOggPacketForPreAudioSampleByteCount(preAudioOggPacketsByteBuffer);
assertThat(preAudioSampleByteCount).isEqualTo(91);
}
@Test
public void parseOggPacketAudioSampleCount_withCodeZeroToc_returnsExpectedAudioSampleCount() {
byte[] packetData =
Bytes.concat(
OGG_ID_HEADER_PACKET_HEADER,
OGG_ID_HEADER_PAYLOAD,
OGG_COMMENT_HEADER_PACKET_HEADER,
OGG_COMMENT_HEADER_PACKET_PAYLOAD,
OGG_OPUS_PACKET_HEADER_SINGLE_SEGMENT,
OGG_OPUS_PACKET_PAYLOAD_CODE_ZERO_TOC);
ByteBuffer oggPacketsByteBuffer = ByteBuffer.wrap(packetData);
int audioSampleCount = OpusUtil.parseOggPacketAudioSampleCount(oggPacketsByteBuffer);
assertThat(audioSampleCount).isEqualTo(480);
}
@Test
public void
parseOggPacketAudioSampleCount_withMultipleOggPageSegments_returnsExpectedAudioSampleCount() {
byte[] packetData =
Bytes.concat(
OGG_ID_HEADER_PACKET_HEADER,
OGG_ID_HEADER_PAYLOAD,
OGG_COMMENT_HEADER_PACKET_HEADER,
OGG_COMMENT_HEADER_PACKET_PAYLOAD,
OGG_OPUS_PACKET_HEADER_MULTIPLE_SEGMENTS,
OGG_OPUS_PACKET_PAYLOAD_CODE_ZERO_TOC);
ByteBuffer oggPacketsByteBuffer = ByteBuffer.wrap(packetData);
int audioSampleCount = OpusUtil.parseOggPacketAudioSampleCount(oggPacketsByteBuffer);
assertThat(audioSampleCount).isEqualTo(480);
}
@Test
public void parseOggPacketAudioSampleCount_withCodeThreeToc_returnsExpectedAudioSampleCount() {
byte[] packetData =
Bytes.concat(
OGG_ID_HEADER_PACKET_HEADER,
OGG_ID_HEADER_PAYLOAD,
OGG_COMMENT_HEADER_PACKET_HEADER,
OGG_COMMENT_HEADER_PACKET_PAYLOAD,
OGG_OPUS_PACKET_HEADER_SINGLE_SEGMENT,
OGG_OPUS_PACKET_PAYLOAD_CODE_THREE_TOC);
ByteBuffer oggPacketsByteBuffer = ByteBuffer.wrap(packetData);
int audioSampleCount = OpusUtil.parseOggPacketAudioSampleCount(oggPacketsByteBuffer);
assertThat(audioSampleCount).isEqualTo(5760);
}
@Test
public void getPacketDurationUs_code0_returnsExpectedDuration() {
long config0DurationUs = OpusUtil.getPacketDurationUs(getBytesFromHexString("04"));
long config1DurationUs = OpusUtil.getPacketDurationUs(getBytesFromHexString("0C"));
......
testdata/src/test/assets/playbackdumps/ogg/bear.opus.oggOpus.dump
SinkDump (OggOpus):
buffers.length = 9
buffers[0] = length 4046, hash 68FA8318
buffers[0] = length 4137, hash 9776A1C3
buffers[1] = length 3848, hash B3105060
buffers[2] = length 3747, hash 63B6648B
buffers[3] = length 3752, hash B5C28B9D
......
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