private void recordVideo() {
ByteBuffer[] encodeOutputBuffers = mEncoder.getOutputBuffers();
while (!endEncode.get()) {
int encoderIndex = mEncoder.dequeueOutputBuffer(mBufferInfo, TIMEOUT_US);
if (encoderIndex == MediaCodec.INFO_OUTPUT_FORMAT_CHANGED) {
if (mediaMuxerStarted) {
throw new IllegalStateException("output format already changed");
}
MediaFormat newFormat = mEncoder.getOutputFormat();
videoTrackIndex = mediaMuxer.addTrack(newFormat);
mediaMuxer.start();
mediaMuxerStarted = true;
} else if (encoderIndex == MediaCodec.INFO_TRY_AGAIN_LATER) {
try {
Thread.sleep(10);
} catch (InterruptedException e) {
e.printStackTrace();
}
} else if (encoderIndex < 0) {
Log.w(TAG, "encoderIndex 非法" + encoderIndex);
} else if (encoderIndex >= 0) {
ByteBuffer encodeData = encodeOutputBuffers[encoderIndex];
if (encodeData == null) {
throw new RuntimeException("编码数据为空");
}
if (mBufferInfo.size != 0) {
if (!mediaMuxerStarted) throw new RuntimeException("混合器未开启");
encodeData.position(mBufferInfo.offset);
encodeData.limit(mBufferInfo.offset + mBufferInfo.size);
mediaMuxer.writeSampleData(videoTrackIndex, encodeData, mBufferInfo);
mEncoder.releaseOutputBuffer(encoderIndex, false);
}
}
}
}
/**
* Do encoding by using MediaCodec encoder, then extracts all pending data from the encoder and
* forwards it to the muxer.
*
* <p>If notifyEndOfStream is not set, this returns when there is no more data to output. If it is
* set, we send EOS to the encoder, and then iterate until we see EOS on the output. Calling this
* with notifyEndOfStream set should be done once, before stopping the muxer.
*
* <p>We're just using the muxer to get a .mp4 file and audio is not included here.
*/
private void doMediaCodecEncoding(boolean notifyEndOfStream) {
if (VERBOSE) {
Log.v(TAG, "doMediaCodecEncoding(" + notifyEndOfStream + ")");
}
if (notifyEndOfStream) {
mEncoder.signalEndOfInputStream();
}
ByteBuffer[] encoderOutputBuffers = mEncoder.getOutputBuffers();
boolean notDone = true;
while (notDone) {
int encoderStatus = mEncoder.dequeueOutputBuffer(mBufferInfo, TIMEOUT_USEC);
if (encoderStatus == MediaCodec.INFO_TRY_AGAIN_LATER) {
if (!notifyEndOfStream) {
/**
* Break out of the while loop because the encoder is not ready to output anything yet.
*/
notDone = false;
} else {
if (VERBOSE) {
Log.v(TAG, "no output available, spinning to await EOS");
}
}
} else if (encoderStatus == MediaCodec.INFO_OUTPUT_BUFFERS_CHANGED) {
// generic case for mediacodec, not likely occurs for encoder.
encoderOutputBuffers = mEncoder.getOutputBuffers();
} else if (encoderStatus == MediaCodec.INFO_OUTPUT_FORMAT_CHANGED) {
/** should happen before receiving buffers, and should only happen once */
if (mMuxerStarted) {
throw new IllegalStateException("format changed twice");
}
MediaFormat newFormat = mEncoder.getOutputFormat();
if (VERBOSE) {
Log.v(TAG, "encoder output format changed: " + newFormat);
}
mTrackIndex = mMuxer.addTrack(newFormat);
mMuxer.start();
mMuxerStarted = true;
} else if (encoderStatus < 0) {
Log.w(TAG, "unexpected result from encoder.dequeueOutputBuffer: " + encoderStatus);
} else {
// Normal flow: get output encoded buffer, send to muxer.
ByteBuffer encodedData = encoderOutputBuffers[encoderStatus];
if (encodedData == null) {
throw new RuntimeException("encoderOutputBuffer " + encoderStatus + " was null");
}
if ((mBufferInfo.flags & MediaCodec.BUFFER_FLAG_CODEC_CONFIG) != 0) {
/**
* The codec config data was pulled out and fed to the muxer when we got the
* INFO_OUTPUT_FORMAT_CHANGED status. Ignore it.
*/
if (VERBOSE) {
Log.v(TAG, "ignoring BUFFER_FLAG_CODEC_CONFIG");
}
mBufferInfo.size = 0;
}
if (mBufferInfo.size != 0) {
if (!mMuxerStarted) {
throw new RuntimeException("muxer hasn't started");
}
/** It's usually necessary to adjust the ByteBuffer values to match BufferInfo. */
encodedData.position(mBufferInfo.offset);
encodedData.limit(mBufferInfo.offset + mBufferInfo.size);
mMuxer.writeSampleData(mTrackIndex, encodedData, mBufferInfo);
if (VERBOSE) {
Log.v(TAG, "sent " + mBufferInfo.size + " bytes to muxer");
}
}
mEncoder.releaseOutputBuffer(encoderStatus, false);
if ((mBufferInfo.flags & MediaCodec.BUFFER_FLAG_END_OF_STREAM) != 0) {
if (!notifyEndOfStream) {
Log.w(TAG, "reached end of stream unexpectedly");
} else {
if (VERBOSE) {
Log.v(TAG, "end of stream reached");
}
}
// Finish encoding.
notDone = false;
}
}
} // End of while(notDone)
}