/*
* libjingle
* Copyright 2014, Google Inc.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
* EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
package org.webrtc;
import android.media.MediaCodec;
import android.media.MediaCodecInfo;
import android.media.MediaCodecInfo.CodecCapabilities;
import android.media.MediaCodecList;
import android.media.MediaFormat;
import android.os.Build;
import android.os.Bundle;
import android.util.Log;
import java.nio.ByteBuffer;
// Java-side of peerconnection_jni.cc:MediaCodecVideoDecoder.
// This class is an implementation detail of the Java PeerConnection API.
// MediaCodec is thread-hostile so this class must be operated on a single
// thread.
class MediaCodecVideoDecoder {
// This class is constructed, operated, and destroyed by its C++ incarnation,
// so the class and its methods have non-public visibility. The API this
// class exposes aims to mimic the webrtc::VideoDecoder API as closely as
// possibly to minimize the amount of translation work necessary.
private static final String TAG = "MediaCodecVideoDecoder";
private static final int DEQUEUE_TIMEOUT = 1000000; // 1 sec timeout.
private Thread mediaCodecThread;
private MediaCodec mediaCodec;
private ByteBuffer[] inputBuffers;
private ByteBuffer[] outputBuffers;
private static final String VP8_MIME_TYPE = "video/x-vnd.on2.vp8";
// List of supported HW VP8 decoders.
private static final String[] supportedHwCodecPrefixes =
{"OMX.Nvidia."};
// NV12 color format supported by QCOM codec, but not declared in MediaCodec -
// see /hardware/qcom/media/mm-core/inc/OMX_QCOMExtns.h
private static final int
COLOR_QCOM_FORMATYUV420PackedSemiPlanar32m = 0x7FA30C04;
// Allowable color formats supported by codec - in order of preference.
private static final int[] supportedColorList = {
CodecCapabilities.COLOR_FormatYUV420Planar,
CodecCapabilities.COLOR_FormatYUV420SemiPlanar,
CodecCapabilities.COLOR_QCOM_FormatYUV420SemiPlanar,
COLOR_QCOM_FORMATYUV420PackedSemiPlanar32m
};
private int colorFormat;
private int width;
private int height;
private int stride;
private int sliceHeight;
private MediaCodecVideoDecoder() { }
// Helper struct for findVp8HwDecoder() below.
private static class DecoderProperties {
DecoderProperties(String codecName, int colorFormat) {
this.codecName = codecName;
this.colorFormat = colorFormat;
}
public final String codecName; // OpenMax component name for VP8 codec.
public final int colorFormat; // Color format supported by codec.
}
private static DecoderProperties findVp8HwDecoder() {
if (Build.VERSION.SDK_INT < Build.VERSION_CODES.KITKAT)
return null; // MediaCodec.setParameters is missing.
for (int i = 0; i < MediaCodecList.getCodecCount(); ++i) {
MediaCodecInfo info = MediaCodecList.getCodecInfoAt(i);
if (info.isEncoder()) {
continue;
}
String name = null;
for (String mimeType : info.getSupportedTypes()) {
if (mimeType.equals(VP8_MIME_TYPE)) {
name = info.getName();
break;
}
}
if (name == null) {
continue; // No VP8 support in this codec; try the next one.
}
Log.d(TAG, "Found candidate decoder " + name);
CodecCapabilities capabilities =
info.getCapabilitiesForType(VP8_MIME_TYPE);
for (int colorFormat : capabilities.colorFormats) {
Log.d(TAG, " Color: 0x" + Integer.toHexString(colorFormat));
}
// Check if this is supported HW decoder
for (String hwCodecPrefix : supportedHwCodecPrefixes) {
if (!name.startsWith(hwCodecPrefix)) {
continue;
}
// Check if codec supports either yuv420 or nv12
for (int supportedColorFormat : supportedColorList) {
for (int codecColorFormat : capabilities.colorFormats) {
if (codecColorFormat == supportedColorFormat) {
// Found supported HW VP8 decoder
Log.d(TAG, "Found target decoder " + name +
". Color: 0x" + Integer.toHexString(codecColorFormat));
return new DecoderProperties(name, codecColorFormat);
}
}
}
}
}
return null; // No HW VP8 decoder.
}
private static boolean isPlatformSupported() {
return findVp8HwDecoder() != null;
}
private void checkOnMediaCodecThread() {
if (mediaCodecThread.getId() != Thread.currentThread().getId()) {
throw new RuntimeException(
"MediaCodecVideoDecoder previously operated on " + mediaCodecThread +
" but is now called on " + Thread.currentThread());
}
}
private boolean initDecode(int width, int height) {
if (mediaCodecThread != null) {
throw new RuntimeException("Forgot to release()?");
}
DecoderProperties properties = findVp8HwDecoder();
if (properties == null) {
throw new RuntimeException("Cannot find HW VP8 decoder");
}
Log.d(TAG, "Java initDecode: " + width + " x " + height +
". Color: 0x" + Integer.toHexString(properties.colorFormat));
mediaCodecThread = Thread.currentThread();
try {
this.width = width;
this.height = height;
stride = width;
sliceHeight = height;
MediaFormat format =
MediaFormat.createVideoFormat(VP8_MIME_TYPE, width, height);
format.setInteger(MediaFormat.KEY_COLOR_FORMAT, properties.colorFormat);
Log.d(TAG, " Format: " + format);
mediaCodec = MediaCodec.createByCodecName(properties.codecName);
if (mediaCodec == null) {
return false;
}
mediaCodec.configure(format, null, null, 0);
mediaCodec.start();
colorFormat = properties.colorFormat;
outputBuffers = mediaCodec.getOutputBuffers();
inputBuffers = mediaCodec.getInputBuffers();
Log.d(TAG, "Input buffers: " + inputBuffers.length +
". Output buffers: " + outputBuffers.length);
return true;
} catch (IllegalStateException e) {
Log.e(TAG, "initDecode failed", e);
return false;
}
}
private void release() {
Log.d(TAG, "Java releaseDecoder");
checkOnMediaCodecThread();
try {
mediaCodec.stop();
mediaCodec.release();
} catch (IllegalStateException e) {
Log.e(TAG, "release failed", e);
}
mediaCodec = null;
mediaCodecThread = null;
}
// Dequeue an input buffer and return its index, -1 if no input buffer is
// available, or -2 if the codec is no longer operative.
private int dequeueInputBuffer() {
checkOnMediaCodecThread();
try {
return mediaCodec.dequeueInputBuffer(DEQUEUE_TIMEOUT);
} catch (IllegalStateException e) {
Log.e(TAG, "dequeueIntputBuffer failed", e);
return -2;
}
}
private boolean queueInputBuffer(
int inputBufferIndex, int size, long timestampUs) {
checkOnMediaCodecThread();
try {
inputBuffers[inputBufferIndex].position(0);
inputBuffers[inputBufferIndex].limit(size);
mediaCodec.queueInputBuffer(inputBufferIndex, 0, size, timestampUs, 0);
return true;
}
catch (IllegalStateException e) {
Log.e(TAG, "decode failed", e);
return false;
}
}
// Dequeue and return an output buffer index, -1 if no output
// buffer available or -2 if error happened.
private int dequeueOutputBuffer() {
checkOnMediaCodecThread();
try {
MediaCodec.BufferInfo info = new MediaCodec.BufferInfo();
int result = mediaCodec.dequeueOutputBuffer(info, DEQUEUE_TIMEOUT);
while (result == MediaCodec.INFO_OUTPUT_BUFFERS_CHANGED ||
result == MediaCodec.INFO_OUTPUT_FORMAT_CHANGED) {
if (result == MediaCodec.INFO_OUTPUT_BUFFERS_CHANGED) {
outputBuffers = mediaCodec.getOutputBuffers();
} else if (result == MediaCodec.INFO_OUTPUT_FORMAT_CHANGED) {
MediaFormat format = mediaCodec.getOutputFormat();
Log.d(TAG, "Format changed: " + format.toString());
width = format.getInteger(MediaFormat.KEY_WIDTH);
height = format.getInteger(MediaFormat.KEY_HEIGHT);
if (format.containsKey(MediaFormat.KEY_COLOR_FORMAT)) {
colorFormat = format.getInteger(MediaFormat.KEY_COLOR_FORMAT);
Log.d(TAG, "Color: 0x" + Integer.toHexString(colorFormat));
// Check if new color space is supported.
boolean validColorFormat = false;
for (int supportedColorFormat : supportedColorList) {
if (colorFormat == supportedColorFormat) {
validColorFormat = true;
break;
}
}
if (!validColorFormat) {
Log.e(TAG, "Non supported color format");
return -2;
}
}
if (format.containsKey("stride")) {
stride = format.getInteger("stride");
}
if (format.containsKey("slice-height")) {
sliceHeight = format.getInteger("slice-height");
}
Log.d(TAG, "Frame stride and slice height: "
+ stride + " x " + sliceHeight);
stride = Math.max(width, stride);
sliceHeight = Math.max(height, sliceHeight);
}
result = mediaCodec.dequeueOutputBuffer(info, DEQUEUE_TIMEOUT);
}
return result;
} catch (IllegalStateException e) {
Log.e(TAG, "dequeueOutputBuffer failed", e);
return -2;
}
}
// Release a dequeued output buffer back to the codec for re-use. Return
// false if the codec is no longer operable.
private boolean releaseOutputBuffer(int index) {
checkOnMediaCodecThread();
try {
mediaCodec.releaseOutputBuffer(index, false);
return true;
} catch (IllegalStateException e) {
Log.e(TAG, "releaseOutputBuffer failed", e);
return false;
}
}
}
