本文整理汇总了Java中com.google.android.exoplayer2.extractor.MpegAudioHeader类的典型用法代码示例。如果您正苦于以下问题:Java MpegAudioHeader类的具体用法?Java MpegAudioHeader怎么用?Java MpegAudioHeader使用的例子?那么恭喜您, 这里精选的类代码示例或许可以为您提供帮助。
MpegAudioHeader类属于com.google.android.exoplayer2.extractor包,在下文中一共展示了MpegAudioHeader类的15个代码示例,这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞,您的评价将有助于系统推荐出更棒的Java代码示例。
示例1: read
import com.google.android.exoplayer2.extractor.MpegAudioHeader; //导入依赖的package包/类
@Override
public int read(ExtractorInput input, PositionHolder seekPosition)
throws IOException, InterruptedException {
if (synchronizedHeaderData == 0) {
try {
synchronize(input, false);
} catch (EOFException e) {
return RESULT_END_OF_INPUT;
}
}
if (seeker == null) {
seeker = setupSeeker(input);
extractorOutput.seekMap(seeker);
trackOutput.format(Format.createAudioSampleFormat(null, synchronizedHeader.mimeType, null,
Format.NO_VALUE, MpegAudioHeader.MAX_FRAME_SIZE_BYTES, synchronizedHeader.channels,
synchronizedHeader.sampleRate, Format.NO_VALUE, gaplessInfoHolder.encoderDelay,
gaplessInfoHolder.encoderPadding, null, null, 0, null,
(flags & FLAG_DISABLE_ID3_METADATA) != 0 ? null : metadata));
}
return readSample(input);
}
示例2: read
import com.google.android.exoplayer2.extractor.MpegAudioHeader; //导入依赖的package包/类
@Override
public int read(ExtractorInput input, PositionHolder seekPosition)
throws IOException, InterruptedException {
if (synchronizedHeaderData == 0) {
try {
synchronize(input, false);
} catch (EOFException e) {
return RESULT_END_OF_INPUT;
}
}
if (seeker == null) {
seeker = setupSeeker(input);
extractorOutput.seekMap(seeker);
trackOutput.format(Format.createAudioSampleFormat(null, synchronizedHeader.mimeType, null,
Format.NO_VALUE, MpegAudioHeader.MAX_FRAME_SIZE_BYTES, synchronizedHeader.channels,
synchronizedHeader.sampleRate, Format.NO_VALUE, gaplessInfoHolder.encoderDelay,
gaplessInfoHolder.encoderPadding, null, null, 0, null));
}
return readSample(input);
}
示例3: read
import com.google.android.exoplayer2.extractor.MpegAudioHeader; //导入依赖的package包/类
@Override
public int read(ExtractorInput input, PositionHolder seekPosition)
throws IOException, InterruptedException {
if (synchronizedHeaderData == 0) {
try {
synchronize(input, false);
} catch (EOFException e) {
return RESULT_END_OF_INPUT;
}
}
if (seeker == null) {
seeker = maybeReadSeekFrame(input);
if (seeker == null
|| (!seeker.isSeekable() && (flags & FLAG_ENABLE_CONSTANT_BITRATE_SEEKING) != 0)) {
seeker = getConstantBitrateSeeker(input);
}
extractorOutput.seekMap(seeker);
trackOutput.format(Format.createAudioSampleFormat(null, synchronizedHeader.mimeType, null,
Format.NO_VALUE, MpegAudioHeader.MAX_FRAME_SIZE_BYTES, synchronizedHeader.channels,
synchronizedHeader.sampleRate, Format.NO_VALUE, gaplessInfoHolder.encoderDelay,
gaplessInfoHolder.encoderPadding, null, null, 0, null,
(flags & FLAG_DISABLE_ID3_METADATA) != 0 ? null : metadata));
}
return readSample(input);
}
示例4: MpegAudioReader
import com.google.android.exoplayer2.extractor.MpegAudioHeader; //导入依赖的package包/类
public MpegAudioReader(String language) {
state = STATE_FINDING_HEADER;
// The first byte of an MPEG Audio frame header is always 0xFF.
headerScratch = new ParsableByteArray(4);
headerScratch.data[0] = (byte) 0xFF;
header = new MpegAudioHeader();
this.language = language;
}
示例5: readHeaderRemainder
import com.google.android.exoplayer2.extractor.MpegAudioHeader; //导入依赖的package包/类
/**
* Attempts to read the remaining two bytes of the frame header.
* <p>
* If a frame header is read in full then the state is changed to {@link #STATE_READING_FRAME},
* the media format is output if this has not previously occurred, the four header bytes are
* output as sample data, and the position of the source is advanced to the byte that immediately
* follows the header.
* <p>
* If a frame header is read in full but cannot be parsed then the state is changed to
* {@link #STATE_READING_HEADER}.
* <p>
* If a frame header is not read in full then the position of the source is advanced to the limit,
* and the method should be called again with the next source to continue the read.
*
* @param source The source from which to read.
*/
private void readHeaderRemainder(ParsableByteArray source) {
int bytesToRead = Math.min(source.bytesLeft(), HEADER_SIZE - frameBytesRead);
source.readBytes(headerScratch.data, frameBytesRead, bytesToRead);
frameBytesRead += bytesToRead;
if (frameBytesRead < HEADER_SIZE) {
// We haven't read the whole header yet.
return;
}
headerScratch.setPosition(0);
boolean parsedHeader = MpegAudioHeader.populateHeader(headerScratch.readInt(), header);
if (!parsedHeader) {
// We thought we'd located a frame header, but we hadn't.
frameBytesRead = 0;
state = STATE_READING_HEADER;
return;
}
frameSize = header.frameSize;
if (!hasOutputFormat) {
frameDurationUs = (C.MICROS_PER_SECOND * header.samplesPerFrame) / header.sampleRate;
Format format = Format.createAudioSampleFormat(formatId, header.mimeType, null,
Format.NO_VALUE, MpegAudioHeader.MAX_FRAME_SIZE_BYTES, header.channels, header.sampleRate,
null, null, 0, language);
output.format(format);
hasOutputFormat = true;
}
headerScratch.setPosition(0);
output.sampleData(headerScratch, HEADER_SIZE);
state = STATE_READING_FRAME;
}
示例6: Mp3Extractor
import com.google.android.exoplayer2.extractor.MpegAudioHeader; //导入依赖的package包/类
/**
* Constructs a new {@link Mp3Extractor}.
*
* @param flags Flags that control the extractor's behavior.
* @param forcedFirstSampleTimestampUs A timestamp to force for the first sample, or
* {@link C#TIME_UNSET} if forcing is not required.
*/
public Mp3Extractor(@Flags int flags, long forcedFirstSampleTimestampUs) {
this.flags = flags;
this.forcedFirstSampleTimestampUs = forcedFirstSampleTimestampUs;
scratch = new ParsableByteArray(SCRATCH_LENGTH);
synchronizedHeader = new MpegAudioHeader();
gaplessInfoHolder = new GaplessInfoHolder();
basisTimeUs = C.TIME_UNSET;
}
示例7: readSample
import com.google.android.exoplayer2.extractor.MpegAudioHeader; //导入依赖的package包/类
private int readSample(ExtractorInput extractorInput) throws IOException, InterruptedException {
if (sampleBytesRemaining == 0) {
extractorInput.resetPeekPosition();
if (!extractorInput.peekFully(scratch.data, 0, 4, true)) {
return RESULT_END_OF_INPUT;
}
scratch.setPosition(0);
int sampleHeaderData = scratch.readInt();
if ((sampleHeaderData & HEADER_MASK) != (synchronizedHeaderData & HEADER_MASK)
|| MpegAudioHeader.getFrameSize(sampleHeaderData) == C.LENGTH_UNSET) {
// We have lost synchronization, so attempt to resynchronize starting at the next byte.
extractorInput.skipFully(1);
synchronizedHeaderData = 0;
return RESULT_CONTINUE;
}
MpegAudioHeader.populateHeader(sampleHeaderData, synchronizedHeader);
if (basisTimeUs == C.TIME_UNSET) {
basisTimeUs = seeker.getTimeUs(extractorInput.getPosition());
if (forcedFirstSampleTimestampUs != C.TIME_UNSET) {
long embeddedFirstSampleTimestampUs = seeker.getTimeUs(0);
basisTimeUs += forcedFirstSampleTimestampUs - embeddedFirstSampleTimestampUs;
}
}
sampleBytesRemaining = synchronizedHeader.frameSize;
}
int bytesAppended = trackOutput.sampleData(extractorInput, sampleBytesRemaining, true);
if (bytesAppended == C.RESULT_END_OF_INPUT) {
return RESULT_END_OF_INPUT;
}
sampleBytesRemaining -= bytesAppended;
if (sampleBytesRemaining > 0) {
return RESULT_CONTINUE;
}
long timeUs = basisTimeUs + (samplesRead * C.MICROS_PER_SECOND / synchronizedHeader.sampleRate);
trackOutput.sampleMetadata(timeUs, C.BUFFER_FLAG_KEY_FRAME, synchronizedHeader.frameSize, 0,
null);
samplesRead += synchronizedHeader.samplesPerFrame;
sampleBytesRemaining = 0;
return RESULT_CONTINUE;
}
示例8: create
import com.google.android.exoplayer2.extractor.MpegAudioHeader; //导入依赖的package包/类
/**
* Returns a {@link XingSeeker} for seeking in the stream, if required information is present.
* Returns {@code null} if not. On returning, {@code frame}'s position is not specified so the
* caller should reset it.
*
* @param mpegAudioHeader The MPEG audio header associated with the frame.
* @param frame The data in this audio frame, with its position set to immediately after the
* 'Xing' or 'Info' tag.
* @param position The position (byte offset) of the start of this frame in the stream.
* @param inputLength The length of the stream in bytes.
* @return A {@link XingSeeker} for seeking in the stream, or {@code null} if the required
* information is not present.
*/
public static XingSeeker create(MpegAudioHeader mpegAudioHeader, ParsableByteArray frame,
long position, long inputLength) {
int samplesPerFrame = mpegAudioHeader.samplesPerFrame;
int sampleRate = mpegAudioHeader.sampleRate;
long firstFramePosition = position + mpegAudioHeader.frameSize;
int flags = frame.readInt();
int frameCount;
if ((flags & 0x01) != 0x01 || (frameCount = frame.readUnsignedIntToInt()) == 0) {
// If the frame count is missing/invalid, the header can't be used to determine the duration.
return null;
}
long durationUs = Util.scaleLargeTimestamp(frameCount, samplesPerFrame * C.MICROS_PER_SECOND,
sampleRate);
if ((flags & 0x06) != 0x06) {
// If the size in bytes or table of contents is missing, the stream is not seekable.
return new XingSeeker(firstFramePosition, durationUs, inputLength);
}
long sizeBytes = frame.readUnsignedIntToInt();
frame.skipBytes(1);
long[] tableOfContents = new long[99];
for (int i = 0; i < 99; i++) {
tableOfContents[i] = frame.readUnsignedByte();
}
// TODO: Handle encoder delay and padding in 3 bytes offset by xingBase + 213 bytes:
// delay = (frame.readUnsignedByte() << 4) + (frame.readUnsignedByte() >> 4);
// padding = ((frame.readUnsignedByte() & 0x0F) << 8) + frame.readUnsignedByte();
return new XingSeeker(firstFramePosition, durationUs, inputLength, tableOfContents,
sizeBytes, mpegAudioHeader.frameSize);
}
示例9: readHeaderRemainder
import com.google.android.exoplayer2.extractor.MpegAudioHeader; //导入依赖的package包/类
/**
* Attempts to read the remaining two bytes of the frame header.
* <p>
* If a frame header is read in full then the state is changed to {@link #STATE_READING_FRAME},
* the media format is output if this has not previously occurred, the four header bytes are
* output as sample data, and the position of the source is advanced to the byte that immediately
* follows the header.
* <p>
* If a frame header is read in full but cannot be parsed then the state is changed to
* {@link #STATE_READING_HEADER}.
* <p>
* If a frame header is not read in full then the position of the source is advanced to the limit,
* and the method should be called again with the next source to continue the read.
*
* @param source The source from which to read.
*/
private void readHeaderRemainder(ParsableByteArray source) {
int bytesToRead = Math.min(source.bytesLeft(), HEADER_SIZE - frameBytesRead);
source.readBytes(headerScratch.data, frameBytesRead, bytesToRead);
frameBytesRead += bytesToRead;
if (frameBytesRead < HEADER_SIZE) {
// We haven't read the whole header yet.
return;
}
headerScratch.setPosition(0);
boolean parsedHeader = MpegAudioHeader.populateHeader(headerScratch.readInt(), header);
if (!parsedHeader) {
// We thought we'd located a frame header, but we hadn't.
frameBytesRead = 0;
state = STATE_READING_HEADER;
return;
}
frameSize = header.frameSize;
if (!hasOutputFormat) {
frameDurationUs = (C.MICROS_PER_SECOND * header.samplesPerFrame) / header.sampleRate;
Format format = Format.createAudioSampleFormat(null, header.mimeType, null, Format.NO_VALUE,
MpegAudioHeader.MAX_FRAME_SIZE_BYTES, header.channels, header.sampleRate, null, null, 0,
language);
output.format(format);
hasOutputFormat = true;
}
headerScratch.setPosition(0);
output.sampleData(headerScratch, HEADER_SIZE);
state = STATE_READING_FRAME;
}
示例10: Mp3Extractor
import com.google.android.exoplayer2.extractor.MpegAudioHeader; //导入依赖的package包/类
/**
* Constructs a new {@link Mp3Extractor}.
*
* @param forcedFirstSampleTimestampUs A timestamp to force for the first sample, or
* {@link C#TIME_UNSET} if forcing is not required.
*/
public Mp3Extractor(long forcedFirstSampleTimestampUs) {
this.forcedFirstSampleTimestampUs = forcedFirstSampleTimestampUs;
scratch = new ParsableByteArray(4);
synchronizedHeader = new MpegAudioHeader();
gaplessInfoHolder = new GaplessInfoHolder();
basisTimeUs = C.TIME_UNSET;
}
示例11: setUp
import com.google.android.exoplayer2.extractor.MpegAudioHeader; //导入依赖的package包/类
@Override
public void setUp() throws Exception {
MpegAudioHeader xingFrameHeader = new MpegAudioHeader();
MpegAudioHeader.populateHeader(XING_FRAME_HEADER_DATA, xingFrameHeader);
seeker = XingSeeker.create(xingFrameHeader, new ParsableByteArray(XING_FRAME_PAYLOAD),
XING_FRAME_POSITION, C.LENGTH_UNSET);
seekerWithInputLength = XingSeeker.create(xingFrameHeader,
new ParsableByteArray(XING_FRAME_PAYLOAD), XING_FRAME_POSITION, INPUT_LENGTH);
xingFrameSize = xingFrameHeader.frameSize;
}
示例12: Mp3Extractor
import com.google.android.exoplayer2.extractor.MpegAudioHeader; //导入依赖的package包/类
/**
* @param flags Flags that control the extractor's behavior.
* @param forcedFirstSampleTimestampUs A timestamp to force for the first sample, or
* {@link C#TIME_UNSET} if forcing is not required.
*/
public Mp3Extractor(@Flags int flags, long forcedFirstSampleTimestampUs) {
this.flags = flags;
this.forcedFirstSampleTimestampUs = forcedFirstSampleTimestampUs;
scratch = new ParsableByteArray(SCRATCH_LENGTH);
synchronizedHeader = new MpegAudioHeader();
gaplessInfoHolder = new GaplessInfoHolder();
basisTimeUs = C.TIME_UNSET;
}
示例13: readSample
import com.google.android.exoplayer2.extractor.MpegAudioHeader; //导入依赖的package包/类
private int readSample(ExtractorInput extractorInput) throws IOException, InterruptedException {
if (sampleBytesRemaining == 0) {
extractorInput.resetPeekPosition();
if (!extractorInput.peekFully(scratch.data, 0, 4, true)) {
return RESULT_END_OF_INPUT;
}
scratch.setPosition(0);
int sampleHeaderData = scratch.readInt();
if (!headersMatch(sampleHeaderData, synchronizedHeaderData)
|| MpegAudioHeader.getFrameSize(sampleHeaderData) == C.LENGTH_UNSET) {
// We have lost synchronization, so attempt to resynchronize starting at the next byte.
extractorInput.skipFully(1);
synchronizedHeaderData = 0;
return RESULT_CONTINUE;
}
MpegAudioHeader.populateHeader(sampleHeaderData, synchronizedHeader);
if (basisTimeUs == C.TIME_UNSET) {
basisTimeUs = seeker.getTimeUs(extractorInput.getPosition());
if (forcedFirstSampleTimestampUs != C.TIME_UNSET) {
long embeddedFirstSampleTimestampUs = seeker.getTimeUs(0);
basisTimeUs += forcedFirstSampleTimestampUs - embeddedFirstSampleTimestampUs;
}
}
sampleBytesRemaining = synchronizedHeader.frameSize;
}
int bytesAppended = trackOutput.sampleData(extractorInput, sampleBytesRemaining, true);
if (bytesAppended == C.RESULT_END_OF_INPUT) {
return RESULT_END_OF_INPUT;
}
sampleBytesRemaining -= bytesAppended;
if (sampleBytesRemaining > 0) {
return RESULT_CONTINUE;
}
long timeUs = basisTimeUs + (samplesRead * C.MICROS_PER_SECOND / synchronizedHeader.sampleRate);
trackOutput.sampleMetadata(timeUs, C.BUFFER_FLAG_KEY_FRAME, synchronizedHeader.frameSize, 0,
null);
samplesRead += synchronizedHeader.samplesPerFrame;
sampleBytesRemaining = 0;
return RESULT_CONTINUE;
}
示例14: getConstantBitrateSeeker
import com.google.android.exoplayer2.extractor.MpegAudioHeader; //导入依赖的package包/类
/**
* Peeks the next frame and returns a {@link ConstantBitrateSeeker} based on its bitrate.
*/
private Seeker getConstantBitrateSeeker(ExtractorInput input)
throws IOException, InterruptedException {
input.peekFully(scratch.data, 0, 4);
scratch.setPosition(0);
MpegAudioHeader.populateHeader(scratch.readInt(), synchronizedHeader);
return new ConstantBitrateSeeker(input.getLength(), input.getPosition(), synchronizedHeader);
}
示例15: ConstantBitrateSeeker
import com.google.android.exoplayer2.extractor.MpegAudioHeader; //导入依赖的package包/类
/**
* @param inputLength The length of the stream in bytes, or {@link C#LENGTH_UNSET} if unknown.
* @param firstFramePosition The position of the first frame in the stream.
* @param mpegAudioHeader The MPEG audio header associated with the first frame.
*/
public ConstantBitrateSeeker(long inputLength, long firstFramePosition,
MpegAudioHeader mpegAudioHeader) {
this.firstFramePosition = firstFramePosition;
this.frameSize = mpegAudioHeader.frameSize;
this.bitrate = mpegAudioHeader.bitrate;
if (inputLength == C.LENGTH_UNSET) {
dataSize = C.LENGTH_UNSET;
durationUs = C.TIME_UNSET;
} else {
dataSize = inputLength - firstFramePosition;
durationUs = getTimeUs(inputLength);
}
}