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get 2 SeekPoints from the getSeekPosition() in flac_parser

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This commit is contained in:
wingyippp 2019-09-04 00:32:16 +08:00
parent a02237de20
commit d9529479fa
5 changed files with 36 additions and 12 deletions
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4
extensions/flac/src/main/java/com/google/android/exoplayer2/ext/flac/FlacDecoderJni.java
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@ -223,7 +223,7 @@ import java.nio.ByteBuffer;
* @return The corresponding position (byte offset) in the flac stream or -1 if the stream doesn't
* have a seek table.
*/
public long getSeekPosition(long timeUs) {
public long[] getSeekPosition(long timeUs) {
return flacGetSeekPosition(nativeDecoderContext, timeUs);
}
@ -283,7 +283,7 @@ import java.nio.ByteBuffer;
private native long flacGetNextFrameFirstSampleIndex(long context);
private native long flacGetSeekPosition(long context, long timeUs);
private native long[] flacGetSeekPosition(long context, long timeUs);
private native String flacGetStateString(long context);

11
extensions/flac/src/main/java/com/google/android/exoplayer2/ext/flac/FlacExtractor.java
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@ -276,7 +276,8 @@ public final class FlacExtractor implements Extractor {
FlacStreamMetadata streamMetadata,
long streamLength,
ExtractorOutput output) {
boolean hasSeekTable = decoderJni.getSeekPosition(/* timeUs= */ 0) != -1;
long[] result = decoderJni.getSeekPosition(/* timeUs= */ 0);
boolean hasSeekTable = result.length == 4 && result[1] != -1 && result[3] != -1;
FlacBinarySearchSeeker binarySearchSeeker = null;
SeekMap seekMap;
if (hasSeekTable) {
@ -341,8 +342,12 @@ public final class FlacExtractor implements Extractor {
@Override
public SeekPoints getSeekPoints(long timeUs) {
// TODO: Access the seek table via JNI to return two seek points when appropriate.
return new SeekPoints(new SeekPoint(timeUs, decoderJni.getSeekPosition(timeUs)));
long[] result = decoderJni.getSeekPosition(timeUs);
if (result.length == 4) {
return new SeekPoints(new SeekPoint(result[0], result[1]), new SeekPoint(result[2], result[3]));
} else {
return new SeekPoints(new SeekPoint(timeUs, decoderJni.getDecodePosition()));
}
}
@Override

8
extensions/flac/src/main/jni/flac_jni.cc
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@ -200,9 +200,13 @@ DECODER_FUNC(jlong, flacGetNextFrameFirstSampleIndex, jlong jContext) {
return context->parser->getNextFrameFirstSampleIndex();
}
DECODER_FUNC(jlong, flacGetSeekPosition, jlong jContext, jlong timeUs) {
DECODER_FUNC(jlongArray, flacGetSeekPosition, jlong jContext, jlong timeUs) {
Context *context = reinterpret_cast<Context *>(jContext);
return context->parser->getSeekPosition(timeUs);
int64_t *result = context->parser->getSeekPosition(timeUs);
const jlong resultJLong[4] = {result[0], result[1], result[2], result[3]};
jlongArray resultArray = env->NewLongArray(4);
env->SetLongArrayRegion(resultArray, 0, 4, resultJLong);
return resultArray;
}
DECODER_FUNC(jstring, flacGetStateString, jlong jContext) {

23
extensions/flac/src/main/jni/flac_parser.cc
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@ -438,9 +438,11 @@ size_t FLACParser::readBuffer(void *output, size_t output_size) {
return bufferSize;
}
int64_t FLACParser::getSeekPosition(int64_t timeUs) {
int64_t* FLACParser::getSeekPosition(int64_t timeUs) {
int64_t *result = new int64_t[4];
memset(result, -1, sizeof(result));
if (!mSeekTable) {
return -1;
return result;
}
int64_t sample = (timeUs * getSampleRate()) / 1000000LL;
@ -452,8 +454,21 @@ int64_t FLACParser::getSeekPosition(int64_t timeUs) {
for (unsigned i = mSeekTable->num_points; i > 0; ) {
i--;
if (points[i].sample_number <= sample) {
return firstFrameOffset + points[i].stream_offset;
result[0] = points[i].sample_number / getSampleRate() * 1000000LL;
result[1] = firstFrameOffset + points[i].stream_offset;
if (i + 1 <= mSeekTable->num_points) {
result[2] = points[i + 1].sample_number / getSampleRate() * 1000000LL;
result[3] = firstFrameOffset + points[i + 1].stream_offset;
} else {
result[2] = result[0];
result[3] = result[1];
}
return result;
}
}
return firstFrameOffset;
result[0] = timeUs;
result[1] = firstFrameOffset;
result[2] = timeUs;
result[3] = firstFrameOffset;
return result;
}

2
extensions/flac/src/main/jni/include/flac_parser.h
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@ -84,7 +84,7 @@ class FLACParser {
bool decodeMetadata();
size_t readBuffer(void *output, size_t output_size);
int64_t getSeekPosition(int64_t timeUs);
int64_t* getSeekPosition(int64_t timeUs);
void flush() {
reset(mCurrentPos);