Java Code Examples for com.google.android.exoplayer2.extractor.MpegAudioHeader#getFrameSize()
The following examples show how to use
com.google.android.exoplayer2.extractor.MpegAudioHeader#getFrameSize() .
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Example 1
| Source File: Mp3Extractor.java From MediaSDK with Apache License 2.0 | 5 votes |
|
private int readSample(ExtractorInput extractorInput) throws IOException, InterruptedException {
if (sampleBytesRemaining == 0) {
extractorInput.resetPeekPosition();
if (peekEndOfStreamOrHeader(extractorInput)) {
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;
}
Example 2
| Source File: Mp3Extractor.java From TelePlus-Android with GNU General Public License v2.0 | 5 votes |
|
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;
}
Example 3
| Source File: Mp3Extractor.java From TelePlus-Android with GNU General Public License v2.0 | 5 votes |
|
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;
}
Example 4
| Source File: Mp3Extractor.java From K-Sonic with MIT License | 5 votes |
|
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;
}
Example 5
| Source File: Mp3Extractor.java From Telegram-FOSS with GNU General Public License v2.0 | 5 votes |
|
private int readSample(ExtractorInput extractorInput) throws IOException, InterruptedException {
if (sampleBytesRemaining == 0) {
extractorInput.resetPeekPosition();
if (peekEndOfStreamOrHeader(extractorInput)) {
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;
}
Example 6
| Source File: Mp3Extractor.java From Telegram with GNU General Public License v2.0 | 5 votes |
|
private int readSample(ExtractorInput extractorInput) throws IOException, InterruptedException {
if (sampleBytesRemaining == 0) {
extractorInput.resetPeekPosition();
if (peekEndOfStreamOrHeader(extractorInput)) {
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;
}
Example 7
| Source File: Mp3Extractor.java From MediaSDK with Apache License 2.0 | 4 votes |
|
private boolean synchronize(ExtractorInput input, boolean sniffing)
throws IOException, InterruptedException {
int validFrameCount = 0;
int candidateSynchronizedHeaderData = 0;
int peekedId3Bytes = 0;
int searchedBytes = 0;
int searchLimitBytes = sniffing ? MAX_SNIFF_BYTES : MAX_SYNC_BYTES;
input.resetPeekPosition();
if (input.getPosition() == 0) {
// We need to parse enough ID3 metadata to retrieve any gapless/seeking playback information
// even if ID3 metadata parsing is disabled.
boolean parseAllId3Frames = (flags & FLAG_DISABLE_ID3_METADATA) == 0;
FramePredicate id3FramePredicate =
parseAllId3Frames ? null : REQUIRED_ID3_FRAME_PREDICATE;
metadata = id3Peeker.peekId3Data(input, id3FramePredicate);
if (metadata != null) {
gaplessInfoHolder.setFromMetadata(metadata);
}
peekedId3Bytes = (int) input.getPeekPosition();
if (!sniffing) {
input.skipFully(peekedId3Bytes);
}
}
while (true) {
if (peekEndOfStreamOrHeader(input)) {
if (validFrameCount > 0) {
// We reached the end of the stream but found at least one valid frame.
break;
}
throw new EOFException();
}
scratch.setPosition(0);
int headerData = scratch.readInt();
int frameSize;
if ((candidateSynchronizedHeaderData != 0
&& !headersMatch(headerData, candidateSynchronizedHeaderData))
|| (frameSize = MpegAudioHeader.getFrameSize(headerData)) == C.LENGTH_UNSET) {
// The header doesn't match the candidate header or is invalid. Try the next byte offset.
if (searchedBytes++ == searchLimitBytes) {
if (!sniffing) {
throw new ParserException("Searched too many bytes.");
}
return false;
}
validFrameCount = 0;
candidateSynchronizedHeaderData = 0;
if (sniffing) {
input.resetPeekPosition();
input.advancePeekPosition(peekedId3Bytes + searchedBytes);
} else {
input.skipFully(1);
}
} else {
// The header matches the candidate header and/or is valid.
validFrameCount++;
if (validFrameCount == 1) {
MpegAudioHeader.populateHeader(headerData, synchronizedHeader);
candidateSynchronizedHeaderData = headerData;
} else if (validFrameCount == 4) {
break;
}
input.advancePeekPosition(frameSize - 4);
}
}
// Prepare to read the synchronized frame.
if (sniffing) {
input.skipFully(peekedId3Bytes + searchedBytes);
} else {
input.resetPeekPosition();
}
synchronizedHeaderData = candidateSynchronizedHeaderData;
return true;
}
Example 8
| Source File: Mp3Extractor.java From TelePlus-Android with GNU General Public License v2.0 | 4 votes |
|
private boolean synchronize(ExtractorInput input, boolean sniffing)
throws IOException, InterruptedException {
int validFrameCount = 0;
int candidateSynchronizedHeaderData = 0;
int peekedId3Bytes = 0;
int searchedBytes = 0;
int searchLimitBytes = sniffing ? MAX_SNIFF_BYTES : MAX_SYNC_BYTES;
input.resetPeekPosition();
if (input.getPosition() == 0) {
// We need to parse enough ID3 metadata to retrieve any gapless playback information even
// if ID3 metadata parsing is disabled.
boolean onlyDecodeGaplessInfoFrames = (flags & FLAG_DISABLE_ID3_METADATA) != 0;
Id3Decoder.FramePredicate id3FramePredicate =
onlyDecodeGaplessInfoFrames ? GaplessInfoHolder.GAPLESS_INFO_ID3_FRAME_PREDICATE : null;
metadata = id3Peeker.peekId3Data(input, id3FramePredicate);
if (metadata != null) {
gaplessInfoHolder.setFromMetadata(metadata);
}
peekedId3Bytes = (int) input.getPeekPosition();
if (!sniffing) {
input.skipFully(peekedId3Bytes);
}
}
while (true) {
if (!input.peekFully(scratch.data, 0, 4, validFrameCount > 0)) {
// We reached the end of the stream but found at least one valid frame.
break;
}
scratch.setPosition(0);
int headerData = scratch.readInt();
int frameSize;
if ((candidateSynchronizedHeaderData != 0
&& !headersMatch(headerData, candidateSynchronizedHeaderData))
|| (frameSize = MpegAudioHeader.getFrameSize(headerData)) == C.LENGTH_UNSET) {
// The header doesn't match the candidate header or is invalid. Try the next byte offset.
if (searchedBytes++ == searchLimitBytes) {
if (!sniffing) {
throw new ParserException("Searched too many bytes.");
}
return false;
}
validFrameCount = 0;
candidateSynchronizedHeaderData = 0;
if (sniffing) {
input.resetPeekPosition();
input.advancePeekPosition(peekedId3Bytes + searchedBytes);
} else {
input.skipFully(1);
}
} else {
// The header matches the candidate header and/or is valid.
validFrameCount++;
if (validFrameCount == 1) {
MpegAudioHeader.populateHeader(headerData, synchronizedHeader);
candidateSynchronizedHeaderData = headerData;
} else if (validFrameCount == 4) {
break;
}
input.advancePeekPosition(frameSize - 4);
}
}
// Prepare to read the synchronized frame.
if (sniffing) {
input.skipFully(peekedId3Bytes + searchedBytes);
} else {
input.resetPeekPosition();
}
synchronizedHeaderData = candidateSynchronizedHeaderData;
return true;
}
Example 9
| Source File: Mp3Extractor.java From TelePlus-Android with GNU General Public License v2.0 | 4 votes |
|
private boolean synchronize(ExtractorInput input, boolean sniffing)
throws IOException, InterruptedException {
int validFrameCount = 0;
int candidateSynchronizedHeaderData = 0;
int peekedId3Bytes = 0;
int searchedBytes = 0;
int searchLimitBytes = sniffing ? MAX_SNIFF_BYTES : MAX_SYNC_BYTES;
input.resetPeekPosition();
if (input.getPosition() == 0) {
// We need to parse enough ID3 metadata to retrieve any gapless playback information even
// if ID3 metadata parsing is disabled.
boolean onlyDecodeGaplessInfoFrames = (flags & FLAG_DISABLE_ID3_METADATA) != 0;
Id3Decoder.FramePredicate id3FramePredicate =
onlyDecodeGaplessInfoFrames ? GaplessInfoHolder.GAPLESS_INFO_ID3_FRAME_PREDICATE : null;
metadata = id3Peeker.peekId3Data(input, id3FramePredicate);
if (metadata != null) {
gaplessInfoHolder.setFromMetadata(metadata);
}
peekedId3Bytes = (int) input.getPeekPosition();
if (!sniffing) {
input.skipFully(peekedId3Bytes);
}
}
while (true) {
if (!input.peekFully(scratch.data, 0, 4, validFrameCount > 0)) {
// We reached the end of the stream but found at least one valid frame.
break;
}
scratch.setPosition(0);
int headerData = scratch.readInt();
int frameSize;
if ((candidateSynchronizedHeaderData != 0
&& !headersMatch(headerData, candidateSynchronizedHeaderData))
|| (frameSize = MpegAudioHeader.getFrameSize(headerData)) == C.LENGTH_UNSET) {
// The header doesn't match the candidate header or is invalid. Try the next byte offset.
if (searchedBytes++ == searchLimitBytes) {
if (!sniffing) {
throw new ParserException("Searched too many bytes.");
}
return false;
}
validFrameCount = 0;
candidateSynchronizedHeaderData = 0;
if (sniffing) {
input.resetPeekPosition();
input.advancePeekPosition(peekedId3Bytes + searchedBytes);
} else {
input.skipFully(1);
}
} else {
// The header matches the candidate header and/or is valid.
validFrameCount++;
if (validFrameCount == 1) {
MpegAudioHeader.populateHeader(headerData, synchronizedHeader);
candidateSynchronizedHeaderData = headerData;
} else if (validFrameCount == 4) {
break;
}
input.advancePeekPosition(frameSize - 4);
}
}
// Prepare to read the synchronized frame.
if (sniffing) {
input.skipFully(peekedId3Bytes + searchedBytes);
} else {
input.resetPeekPosition();
}
synchronizedHeaderData = candidateSynchronizedHeaderData;
return true;
}
Example 10
| Source File: Mp3Extractor.java From K-Sonic with MIT License | 4 votes |
|
private boolean synchronize(ExtractorInput input, boolean sniffing)
throws IOException, InterruptedException {
int validFrameCount = 0;
int candidateSynchronizedHeaderData = 0;
int peekedId3Bytes = 0;
int searchedBytes = 0;
int searchLimitBytes = sniffing ? MAX_SNIFF_BYTES : MAX_SYNC_BYTES;
input.resetPeekPosition();
if (input.getPosition() == 0) {
peekId3Data(input);
peekedId3Bytes = (int) input.getPeekPosition();
if (!sniffing) {
input.skipFully(peekedId3Bytes);
}
}
while (true) {
if (!input.peekFully(scratch.data, 0, 4, validFrameCount > 0)) {
// We reached the end of the stream but found at least one valid frame.
break;
}
scratch.setPosition(0);
int headerData = scratch.readInt();
int frameSize;
if ((candidateSynchronizedHeaderData != 0
&& (headerData & HEADER_MASK) != (candidateSynchronizedHeaderData & HEADER_MASK))
|| (frameSize = MpegAudioHeader.getFrameSize(headerData)) == C.LENGTH_UNSET) {
// The header doesn't match the candidate header or is invalid. Try the next byte offset.
if (searchedBytes++ == searchLimitBytes) {
if (!sniffing) {
throw new ParserException("Searched too many bytes.");
}
return false;
}
validFrameCount = 0;
candidateSynchronizedHeaderData = 0;
if (sniffing) {
input.resetPeekPosition();
input.advancePeekPosition(peekedId3Bytes + searchedBytes);
} else {
input.skipFully(1);
}
} else {
// The header matches the candidate header and/or is valid.
validFrameCount++;
if (validFrameCount == 1) {
MpegAudioHeader.populateHeader(headerData, synchronizedHeader);
candidateSynchronizedHeaderData = headerData;
} else if (validFrameCount == 4) {
break;
}
input.advancePeekPosition(frameSize - 4);
}
}
// Prepare to read the synchronized frame.
if (sniffing) {
input.skipFully(peekedId3Bytes + searchedBytes);
} else {
input.resetPeekPosition();
}
synchronizedHeaderData = candidateSynchronizedHeaderData;
return true;
}
Example 11
| Source File: Mp3Extractor.java From Telegram-FOSS with GNU General Public License v2.0 | 4 votes |
|
private boolean synchronize(ExtractorInput input, boolean sniffing)
throws IOException, InterruptedException {
int validFrameCount = 0;
int candidateSynchronizedHeaderData = 0;
int peekedId3Bytes = 0;
int searchedBytes = 0;
int searchLimitBytes = sniffing ? MAX_SNIFF_BYTES : MAX_SYNC_BYTES;
input.resetPeekPosition();
if (input.getPosition() == 0) {
// We need to parse enough ID3 metadata to retrieve any gapless/seeking playback information
// even if ID3 metadata parsing is disabled.
boolean parseAllId3Frames = (flags & FLAG_DISABLE_ID3_METADATA) == 0;
Id3Decoder.FramePredicate id3FramePredicate =
parseAllId3Frames ? null : REQUIRED_ID3_FRAME_PREDICATE;
metadata = id3Peeker.peekId3Data(input, id3FramePredicate);
if (metadata != null) {
gaplessInfoHolder.setFromMetadata(metadata);
}
peekedId3Bytes = (int) input.getPeekPosition();
if (!sniffing) {
input.skipFully(peekedId3Bytes);
}
}
while (true) {
if (peekEndOfStreamOrHeader(input)) {
if (validFrameCount > 0) {
// We reached the end of the stream but found at least one valid frame.
break;
}
throw new EOFException();
}
scratch.setPosition(0);
int headerData = scratch.readInt();
int frameSize;
if ((candidateSynchronizedHeaderData != 0
&& !headersMatch(headerData, candidateSynchronizedHeaderData))
|| (frameSize = MpegAudioHeader.getFrameSize(headerData)) == C.LENGTH_UNSET) {
// The header doesn't match the candidate header or is invalid. Try the next byte offset.
if (searchedBytes++ == searchLimitBytes) {
if (!sniffing) {
throw new ParserException("Searched too many bytes.");
}
return false;
}
validFrameCount = 0;
candidateSynchronizedHeaderData = 0;
if (sniffing) {
input.resetPeekPosition();
input.advancePeekPosition(peekedId3Bytes + searchedBytes);
} else {
input.skipFully(1);
}
} else {
// The header matches the candidate header and/or is valid.
validFrameCount++;
if (validFrameCount == 1) {
MpegAudioHeader.populateHeader(headerData, synchronizedHeader);
candidateSynchronizedHeaderData = headerData;
} else if (validFrameCount == 4) {
break;
}
input.advancePeekPosition(frameSize - 4);
}
}
// Prepare to read the synchronized frame.
if (sniffing) {
input.skipFully(peekedId3Bytes + searchedBytes);
} else {
input.resetPeekPosition();
}
synchronizedHeaderData = candidateSynchronizedHeaderData;
return true;
}
Example 12
| Source File: Mp3Extractor.java From Telegram with GNU General Public License v2.0 | 4 votes |
|
private boolean synchronize(ExtractorInput input, boolean sniffing)
throws IOException, InterruptedException {
int validFrameCount = 0;
int candidateSynchronizedHeaderData = 0;
int peekedId3Bytes = 0;
int searchedBytes = 0;
int searchLimitBytes = sniffing ? MAX_SNIFF_BYTES : MAX_SYNC_BYTES;
input.resetPeekPosition();
if (input.getPosition() == 0) {
// We need to parse enough ID3 metadata to retrieve any gapless/seeking playback information
// even if ID3 metadata parsing is disabled.
boolean parseAllId3Frames = (flags & FLAG_DISABLE_ID3_METADATA) == 0;
Id3Decoder.FramePredicate id3FramePredicate =
parseAllId3Frames ? null : REQUIRED_ID3_FRAME_PREDICATE;
metadata = id3Peeker.peekId3Data(input, id3FramePredicate);
if (metadata != null) {
gaplessInfoHolder.setFromMetadata(metadata);
}
peekedId3Bytes = (int) input.getPeekPosition();
if (!sniffing) {
input.skipFully(peekedId3Bytes);
}
}
while (true) {
if (peekEndOfStreamOrHeader(input)) {
if (validFrameCount > 0) {
// We reached the end of the stream but found at least one valid frame.
break;
}
throw new EOFException();
}
scratch.setPosition(0);
int headerData = scratch.readInt();
int frameSize;
if ((candidateSynchronizedHeaderData != 0
&& !headersMatch(headerData, candidateSynchronizedHeaderData))
|| (frameSize = MpegAudioHeader.getFrameSize(headerData)) == C.LENGTH_UNSET) {
// The header doesn't match the candidate header or is invalid. Try the next byte offset.
if (searchedBytes++ == searchLimitBytes) {
if (!sniffing) {
throw new ParserException("Searched too many bytes.");
}
return false;
}
validFrameCount = 0;
candidateSynchronizedHeaderData = 0;
if (sniffing) {
input.resetPeekPosition();
input.advancePeekPosition(peekedId3Bytes + searchedBytes);
} else {
input.skipFully(1);
}
} else {
// The header matches the candidate header and/or is valid.
validFrameCount++;
if (validFrameCount == 1) {
MpegAudioHeader.populateHeader(headerData, synchronizedHeader);
candidateSynchronizedHeaderData = headerData;
} else if (validFrameCount == 4) {
break;
}
input.advancePeekPosition(frameSize - 4);
}
}
// Prepare to read the synchronized frame.
if (sniffing) {
input.skipFully(peekedId3Bytes + searchedBytes);
} else {
input.resetPeekPosition();
}
synchronizedHeaderData = candidateSynchronizedHeaderData;
return true;
}
