You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
101 lines
4.0 KiB
Java
101 lines
4.0 KiB
Java
package org.easydarwin.audio;
|
|
|
|
import android.media.MediaCodec;
|
|
import android.media.MediaCodecInfo;
|
|
import android.media.MediaFormat;
|
|
import android.util.Log;
|
|
|
|
import org.easydarwin.video.EasyMuxer;
|
|
|
|
import java.io.IOException;
|
|
import java.nio.ByteBuffer;
|
|
|
|
/**
|
|
* 对EasyMuxer的扩展。支持对PCM格式的音频打包。
|
|
*/
|
|
public class EasyAACMuxer extends EasyMuxer {
|
|
MediaCodec mMediaCodec;
|
|
String TAG = "EasyAACMuxer";
|
|
|
|
protected MediaCodec.BufferInfo mBufferInfo = new MediaCodec.BufferInfo();
|
|
protected ByteBuffer[] mBuffers = null;
|
|
|
|
private MediaFormat mAudioFormat;
|
|
|
|
public EasyAACMuxer(String path, boolean hasAudio, long durationMillis) {
|
|
super(path, hasAudio, durationMillis);
|
|
}
|
|
|
|
@Override
|
|
public synchronized void addTrack(MediaFormat format, boolean isVideo) {
|
|
super.addTrack(format, isVideo);
|
|
if (!isVideo){
|
|
mAudioFormat = format;
|
|
}
|
|
}
|
|
|
|
public synchronized void pumpPCMStream(byte []pcm, int length, long timeUs) throws IOException {
|
|
|
|
if (mMediaCodec == null) {// 启动AAC编码器。这里用MediaCodec来编码
|
|
if (mAudioFormat == null) return;
|
|
mMediaCodec = MediaCodec.createEncoderByType("audio/mp4a-latm");
|
|
Log.i(TAG, String.valueOf(mAudioFormat));
|
|
mAudioFormat.setString(MediaFormat.KEY_MIME, "audio/mp4a-latm");
|
|
mAudioFormat.setInteger(MediaFormat.KEY_AAC_PROFILE,MediaCodecInfo.CodecProfileLevel.AACObjectLC);
|
|
mAudioFormat.setInteger(MediaFormat.KEY_BIT_RATE, 16000);
|
|
// mAudioFormat.setInteger(MediaFormat.KEY_MAX_INPUT_SIZE, 320);
|
|
|
|
mMediaCodec.configure(mAudioFormat, null, null, MediaCodec.CONFIGURE_FLAG_ENCODE);
|
|
mMediaCodec.start();
|
|
mBuffers = mMediaCodec.getOutputBuffers();
|
|
}
|
|
int index = 0;
|
|
// 将pcm编码成AAC
|
|
do {
|
|
index = mMediaCodec.dequeueOutputBuffer(mBufferInfo, 1000);
|
|
if (index >= 0) {
|
|
if ((mBufferInfo.flags & MediaCodec.BUFFER_FLAG_CODEC_CONFIG) != 0) {
|
|
continue;
|
|
}
|
|
if (mBufferInfo.presentationTimeUs == 0){
|
|
continue;
|
|
}
|
|
if (VERBOSE) Log.d(TAG,String.format("dequeueOutputBuffer data length:%d,tmUS:%d", mBufferInfo.size, mBufferInfo.presentationTimeUs));
|
|
ByteBuffer outputBuffer = mBuffers[index];
|
|
// ok,编码成功了。将AAC数据写入muxer.
|
|
pumpStream(outputBuffer, mBufferInfo, false);
|
|
mMediaCodec.releaseOutputBuffer(index, false);
|
|
} else if (index == MediaCodec.INFO_OUTPUT_BUFFERS_CHANGED) {
|
|
mBuffers = mMediaCodec.getOutputBuffers();
|
|
} else if (index == MediaCodec.INFO_OUTPUT_FORMAT_CHANGED) {
|
|
Log.v(TAG, "output format changed...");
|
|
MediaFormat newFormat = mMediaCodec.getOutputFormat();
|
|
Log.v(TAG, "output format changed..." + newFormat);
|
|
} else if (index == MediaCodec.INFO_TRY_AGAIN_LATER) {
|
|
Log.v(TAG, "No buffer available...");
|
|
} else {
|
|
Log.e(TAG, "Message: " + index);
|
|
}
|
|
} while (index >= 0 && !Thread.currentThread().isInterrupted());
|
|
|
|
final ByteBuffer[] inputBuffers = mMediaCodec.getInputBuffers();
|
|
do {
|
|
index = mMediaCodec.dequeueInputBuffer(1000);
|
|
if (index >= 0) {
|
|
inputBuffers[index].clear();
|
|
inputBuffers[index].put(pcm, 0, length);
|
|
if (VERBOSE) Log.d(TAG,String.format("queueInputBuffer pcm data length:%d,tmUS:%d", length, timeUs));
|
|
mMediaCodec.queueInputBuffer(index, 0, length, timeUs, 0);
|
|
}
|
|
}
|
|
while (!Thread.currentThread().isInterrupted() && index < 0);
|
|
}
|
|
|
|
@Override
|
|
public synchronized void release() {
|
|
if (mMediaCodec != null) mMediaCodec.release();
|
|
mMediaCodec = null;
|
|
super.release();
|
|
}
|
|
}
|