/**
* Write a media sample to the decoder.
*
* <p>A "sample" here refers to a single atomic access unit in the media stream. The definition of
* "access unit" is dependent on the type of encoding used, but it typically refers to a single
* frame of video or a few seconds of audio. {@link android.media.MediaExtractor} extracts data
* from a stream one sample at a time.
*
* @param extractor Instance of {@link android.media.MediaExtractor} wrapping the media.
* @param presentationTimeUs The time, relative to the beginning of the media stream, at which
* this buffer should be rendered.
* @param flags Flags to pass to the decoder. See {@link MediaCodec#queueInputBuffer(int, int,
* int, long, int)}
* @throws MediaCodec.CryptoException
*/
public boolean writeSample(
final MediaExtractor extractor,
final boolean isSecure,
final long presentationTimeUs,
int flags) {
boolean result = false;
boolean isEos = false;
if (!mAvailableInputBuffers.isEmpty()) {
int index = mAvailableInputBuffers.remove();
ByteBuffer buffer = mInputBuffers[index];
// reads the sample from the file using extractor into the buffer
int size = extractor.readSampleData(buffer, 0);
if (size <= 0) {
flags |= MediaCodec.BUFFER_FLAG_END_OF_STREAM;
}
// Submit the buffer to the codec for decoding. The presentationTimeUs
// indicates the position (play time) for the current sample.
if (!isSecure) {
mDecoder.queueInputBuffer(index, 0, size, presentationTimeUs, flags);
} else {
extractor.getSampleCryptoInfo(cryptoInfo);
mDecoder.queueSecureInputBuffer(index, 0, cryptoInfo, presentationTimeUs, flags);
}
result = true;
}
return result;
}
/**
* Equivalent to {@link MediaExtractor#getSampleCryptoInfo(android.media.MediaCodec.CryptoInfo)}.
*
* @param extractor The extractor from which to retrieve the crypto information.
*/
@TargetApi(16)
public void setFromExtractorV16(MediaExtractor extractor) {
extractor.getSampleCryptoInfo(frameworkCryptoInfo);
numSubSamples = frameworkCryptoInfo.numSubSamples;
numBytesOfClearData = frameworkCryptoInfo.numBytesOfClearData;
numBytesOfEncryptedData = frameworkCryptoInfo.numBytesOfEncryptedData;
key = frameworkCryptoInfo.key;
iv = frameworkCryptoInfo.iv;
mode = frameworkCryptoInfo.mode;
}
