/*
* Copyright 2013 The WebRTC project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
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.opengl.GLES20;
import android.os.Build;
import android.os.Bundle;
import android.view.Surface;
import com.github.piasy.videocre.MediaCodecCallback;
import java.nio.ByteBuffer;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.HashSet;
import java.util.List;
import java.util.Set;
import java.util.concurrent.CountDownLatch;
import java.util.concurrent.TimeUnit;
// Java-side of peerconnection_jni.cc:MediaCodecVideoEncoder.
// This class is an implementation detail of the Java PeerConnection API.
@SuppressWarnings("deprecation")
public class MediaCodecVideoEncoder {
// 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::VideoEncoder API as closely as
// possibly to minimize the amount of translation work necessary.
private static final String TAG = "MediaCodecVideoEncoder";
// Tracks webrtc::VideoCodecType.
public enum VideoCodecType { VIDEO_CODEC_VP8, VIDEO_CODEC_VP9, VIDEO_CODEC_H264 }
private static final int MEDIA_CODEC_RELEASE_TIMEOUT_MS = 5000; // Timeout for codec releasing.
private static final int DEQUEUE_TIMEOUT = 0; // Non-blocking, no wait.
private static final int OUTPUT_THREAD_DEQUEUE_TIMEOUT_US = 3000; // 3 ms
private static final int BITRATE_ADJUSTMENT_FPS = 30;
private static final int MAXIMUM_INITIAL_FPS = 30;
private static final double BITRATE_CORRECTION_SEC = 3.0;
// Maximum bitrate correction scale - no more than 4 times.
private static final double BITRATE_CORRECTION_MAX_SCALE = 4;
// Amount of correction steps to reach correction maximum scale.
private static final int BITRATE_CORRECTION_STEPS = 20;
// Forced key frame interval - used to reduce color distortions on Qualcomm platform.
private static final long QCOM_VP8_KEY_FRAME_INTERVAL_ANDROID_L_MS = 15000;
private static final long QCOM_VP8_KEY_FRAME_INTERVAL_ANDROID_M_MS = 20000;
private static final long QCOM_VP8_KEY_FRAME_INTERVAL_ANDROID_N_MS = 15000;
// Active running encoder instance. Set in initEncode() (called from native code)
// and reset to null in release() call.
private static MediaCodecVideoEncoder runningInstance = null;
private static MediaCodecVideoEncoderErrorCallback errorCallback = null;
private static int codecErrors = 0;
// List of disabled codec types - can be set from application.
private static Set<String> hwEncoderDisabledTypes = new HashSet<String>();
private Thread mediaCodecThread;
private MediaCodec mediaCodec;
private ByteBuffer[] outputBuffers;
private EglBase eglBase;
private int profile;
private int width;
private int height;
private Surface inputSurface;
private GlRectDrawer drawer;
// Thread that delivers encoded frames to the user callback.
private Thread outputThread;
private MediaCodec.BufferInfo outputBufferInfo = new MediaCodec.BufferInfo();
private ByteBuffer keyFrameData = ByteBuffer.allocateDirect(10240); // pre-allocate 10 KB
private OutputBufferInfo outputFrame = new OutputBufferInfo();
private MediaCodecCallback callback;
// Whether the encoder is running. Volatile so that the output thread can watch this value and
// exit when the encoder stops.
private volatile boolean running = false;
private static final String VP8_MIME_TYPE = "video/x-vnd.on2.vp8";
private static final String VP9_MIME_TYPE = "video/x-vnd.on2.vp9";
private static final String H264_MIME_TYPE = "video/avc";
private static final int VIDEO_AVCProfileHigh = 8;
private static final int VIDEO_AVCLevel3 = 0x100;
// Type of bitrate adjustment for video encoder.
public enum BitrateAdjustmentType {
// No adjustment - video encoder has no known bitrate problem.
NO_ADJUSTMENT,
// Framerate based bitrate adjustment is required - HW encoder does not use frame
// timestamps to calculate frame bitrate budget and instead is relying on initial
// fps configuration assuming that all frames are coming at fixed initial frame rate.
FRAMERATE_ADJUSTMENT,
// Dynamic bitrate adjustment is required - HW encoder used frame timestamps, but actual
// bitrate deviates too much from the target value.
DYNAMIC_ADJUSTMENT
}
// Should be in sync with webrtc::H264::Profile.
public static enum H264Profile {
CONSTRAINED_BASELINE(0),
BASELINE(1),
MAIN(2),
CONSTRAINED_HIGH(3),
HIGH(4);
private final int value;
H264Profile(int value) {
this.value = value;
}
public int getValue() {
return value;
}
}
// Class describing supported media codec properties.
private static class MediaCodecProperties {
public final String codecPrefix;
// Minimum Android SDK required for this codec to be used.
public final int minSdk;
// Flag if encoder implementation does not use frame timestamps to calculate frame bitrate
// budget and instead is relying on initial fps configuration assuming that all frames are
// coming at fixed initial frame rate. Bitrate adjustment is required for this case.
public final BitrateAdjustmentType bitrateAdjustmentType;
MediaCodecProperties(
String codecPrefix, int minSdk, BitrateAdjustmentType bitrateAdjustmentType) {
this.codecPrefix = codecPrefix;
this.minSdk = minSdk;
this.bitrateAdjustmentType = bitrateAdjustmentType;
}
}
// List of supported HW VP8 encoders.
private static final MediaCodecProperties qcomVp8HwProperties = new MediaCodecProperties(
"OMX.qcom.", Build.VERSION_CODES.KITKAT, BitrateAdjustmentType.NO_ADJUSTMENT);
private static final MediaCodecProperties exynosVp8HwProperties = new MediaCodecProperties(
"OMX.Exynos.", Build.VERSION_CODES.M, BitrateAdjustmentType.DYNAMIC_ADJUSTMENT);
private static final MediaCodecProperties intelVp8HwProperties = new MediaCodecProperties(
"OMX.Intel.", Build.VERSION_CODES.LOLLIPOP, BitrateAdjustmentType.NO_ADJUSTMENT);
private static MediaCodecProperties[] vp8HwList() {
final ArrayList<MediaCodecProperties> supported_codecs = new ArrayList<MediaCodecProperties>();
supported_codecs.add(qcomVp8HwProperties);
supported_codecs.add(exynosVp8HwProperties);
supported_codecs.add(intelVp8HwProperties);
return supported_codecs.toArray(new MediaCodecProperties[supported_codecs.size()]);
}
// List of supported HW VP9 encoders.
private static final MediaCodecProperties qcomVp9HwProperties = new MediaCodecProperties(
"OMX.qcom.", Build.VERSION_CODES.N, BitrateAdjustmentType.NO_ADJUSTMENT);
private static final MediaCodecProperties exynosVp9HwProperties = new MediaCodecProperties(
"OMX.Exynos.", Build.VERSION_CODES.N, BitrateAdjustmentType.FRAMERATE_ADJUSTMENT);
private static final MediaCodecProperties[] vp9HwList =
new MediaCodecProperties[] {qcomVp9HwProperties, exynosVp9HwProperties};
// List of supported HW H.264 encoders.
private static final MediaCodecProperties qcomH264HwProperties = new MediaCodecProperties(
"OMX.qcom.", Build.VERSION_CODES.KITKAT, BitrateAdjustmentType.NO_ADJUSTMENT);
private static final MediaCodecProperties exynosH264HwProperties = new MediaCodecProperties(
"OMX.Exynos.", Build.VERSION_CODES.LOLLIPOP, BitrateAdjustmentType.FRAMERATE_ADJUSTMENT);
private static final MediaCodecProperties[] h264HwList =
new MediaCodecProperties[] {qcomH264HwProperties, exynosH264HwProperties};
// List of supported HW H.264 high profile encoders.
private static final MediaCodecProperties exynosH264HighProfileHwProperties =
new MediaCodecProperties(
"OMX.Exynos.", Build.VERSION_CODES.M, BitrateAdjustmentType.FRAMERATE_ADJUSTMENT);
private static final MediaCodecProperties[] h264HighProfileHwList =
new MediaCodecProperties[] {exynosH264HighProfileHwProperties};
// List of devices with poor H.264 encoder quality.
// HW H.264 encoder on below devices has poor bitrate control - actual
// bitrates deviates a lot from the target value.
private static final String[] H264_HW_EXCEPTION_MODELS =
new String[] {"SAMSUNG-SGH-I337", "Nexus 7", "Nexus 4"};
// Bitrate modes - should be in sync with OMX_VIDEO_CONTROLRATETYPE defined
// in OMX_Video.h
private static final int VIDEO_ControlRateConstant = 2;
// 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 static final int[] supportedSurfaceColorList = {CodecCapabilities.COLOR_FormatSurface};
private VideoCodecType type;
private int colorFormat; // Used by native code.
// Variables used for dynamic bitrate adjustment.
private BitrateAdjustmentType bitrateAdjustmentType = BitrateAdjustmentType.NO_ADJUSTMENT;
private double bitrateAccumulator;
private double bitrateAccumulatorMax;
private double bitrateObservationTimeMs;
private int bitrateAdjustmentScaleExp;
private int targetBitrateBps;
private int targetFps;
// Interval in ms to force key frame generation. Used to reduce the time of color distortions
// happened sometime when using Qualcomm video encoder.
private long forcedKeyFrameMs;
private long lastKeyFrameMs;
// SPS and PPS NALs (Config frame) for H.264.
private ByteBuffer configData = null;
// MediaCodec error handler - invoked when critical error happens which may prevent
// further use of media codec API. Now it means that one of media codec instances
// is hanging and can no longer be used in the next call.
public static interface MediaCodecVideoEncoderErrorCallback {
void onMediaCodecVideoEncoderCriticalError(int codecErrors);
}
public static void setErrorCallback(MediaCodecVideoEncoderErrorCallback errorCallback) {
Logging.d(TAG, "Set error callback");
MediaCodecVideoEncoder.errorCallback = errorCallback;
}
// Functions to disable HW encoding - can be called from applications for platforms
// which have known HW decoding problems.
public static void disableVp8HwCodec() {
Logging.w(TAG, "VP8 encoding is disabled by application.");
hwEncoderDisabledTypes.add(VP8_MIME_TYPE);
}
public static void disableVp9HwCodec() {
Logging.w(TAG, "VP9 encoding is disabled by application.");
hwEncoderDisabledTypes.add(VP9_MIME_TYPE);
}
public static void disableH264HwCodec() {
Logging.w(TAG, "H.264 encoding is disabled by application.");
hwEncoderDisabledTypes.add(H264_MIME_TYPE);
}
// Functions to query if HW encoding is supported.
public static boolean isVp8HwSupported() {
return !hwEncoderDisabledTypes.contains(VP8_MIME_TYPE)
&& (findHwEncoder(VP8_MIME_TYPE, vp8HwList(), supportedColorList) != null);
}
public static EncoderProperties vp8HwEncoderProperties() {
if (hwEncoderDisabledTypes.contains(VP8_MIME_TYPE)) {
return null;
} else {
return findHwEncoder(VP8_MIME_TYPE, vp8HwList(), supportedColorList);
}
}
public static boolean isVp9HwSupported() {
return !hwEncoderDisabledTypes.contains(VP9_MIME_TYPE)
&& (findHwEncoder(VP9_MIME_TYPE, vp9HwList, supportedColorList) != null);
}
public static boolean isH264HwSupported() {
return !hwEncoderDisabledTypes.contains(H264_MIME_TYPE)
&& (findHwEncoder(H264_MIME_TYPE, h264HwList, supportedColorList) != null);
}
public static boolean isH264HighProfileHwSupported() {
return !hwEncoderDisabledTypes.contains(H264_MIME_TYPE)
&& (findHwEncoder(H264_MIME_TYPE, h264HighProfileHwList, supportedColorList) != null);
}
public static boolean isVp8HwSupportedUsingTextures() {
return !hwEncoderDisabledTypes.contains(VP8_MIME_TYPE)
&& (findHwEncoder(VP8_MIME_TYPE, vp8HwList(), supportedSurfaceColorList) != null);
}
public static boolean isVp9HwSupportedUsingTextures() {
return !hwEncoderDisabledTypes.contains(VP9_MIME_TYPE)
&& (findHwEncoder(VP9_MIME_TYPE, vp9HwList, supportedSurfaceColorList) != null);
}
public static boolean isH264HwSupportedUsingTextures() {
return !hwEncoderDisabledTypes.contains(H264_MIME_TYPE)
&& (findHwEncoder(H264_MIME_TYPE, h264HwList, supportedSurfaceColorList) != null);
}
// Helper struct for findHwEncoder() below.
public static class EncoderProperties {
public EncoderProperties(
String codecName, int colorFormat, BitrateAdjustmentType bitrateAdjustmentType) {
this.codecName = codecName;
this.colorFormat = colorFormat;
this.bitrateAdjustmentType = bitrateAdjustmentType;
}
public final String codecName; // OpenMax component name for HW codec.
public final int colorFormat; // Color format supported by codec.
public final BitrateAdjustmentType bitrateAdjustmentType; // Bitrate adjustment type
}
private static EncoderProperties findHwEncoder(
String mime, MediaCodecProperties[] supportedHwCodecProperties, int[] colorList) {
// MediaCodec.setParameters is missing for JB and below, so bitrate
// can not be adjusted dynamically.
if (Build.VERSION.SDK_INT < Build.VERSION_CODES.KITKAT) {
return null;
}
// Check if device is in H.264 exception list.
if (mime.equals(H264_MIME_TYPE)) {
List<String> exceptionModels = Arrays.asList(H264_HW_EXCEPTION_MODELS);
if (exceptionModels.contains(Build.MODEL)) {
Logging.w(TAG, "Model: " + Build.MODEL + " has black listed H.264 encoder.");
return null;
}
}
for (int i = 0; i < MediaCodecList.getCodecCount(); ++i) {
MediaCodecInfo info = null;
try {
info = MediaCodecList.getCodecInfoAt(i);
} catch (IllegalArgumentException e) {
Logging.e(TAG, "Cannot retrieve encoder codec info", e);
}
if (info == null || !info.isEncoder()) {
continue;
}
String name = null;
for (String mimeType : info.getSupportedTypes()) {
if (mimeType.equals(mime)) {
name = info.getName();
break;
}
}
if (name == null) {
continue; // No HW support in this codec; try the next one.
}
Logging.v(TAG, "Found candidate encoder " + name);
// Check if this is supported HW encoder.
boolean supportedCodec = false;
BitrateAdjustmentType bitrateAdjustmentType = BitrateAdjustmentType.NO_ADJUSTMENT;
for (MediaCodecProperties codecProperties : supportedHwCodecProperties) {
if (name.startsWith(codecProperties.codecPrefix)) {
if (Build.VERSION.SDK_INT < codecProperties.minSdk) {
Logging.w(
TAG, "Codec " + name + " is disabled due to SDK version " + Build.VERSION.SDK_INT);
continue;
}
if (codecProperties.bitrateAdjustmentType != BitrateAdjustmentType.NO_ADJUSTMENT) {
bitrateAdjustmentType = codecProperties.bitrateAdjustmentType;
Logging.w(
TAG, "Codec " + name + " requires bitrate adjustment: " + bitrateAdjustmentType);
}
supportedCodec = true;
break;
}
}
if (!supportedCodec) {
continue;
}
// Check if HW codec supports known color format.
CodecCapabilities capabilities;
try {
capabilities = info.getCapabilitiesForType(mime);
} catch (IllegalArgumentException e) {
Logging.e(TAG, "Cannot retrieve encoder capabilities", e);
continue;
}
for (int colorFormat : capabilities.colorFormats) {
Logging.v(TAG, " Color: 0x" + Integer.toHexString(colorFormat));
}
for (int supportedColorFormat : colorList) {
for (int codecColorFormat : capabilities.colorFormats) {
if (codecColorFormat == supportedColorFormat) {
// Found supported HW encoder.
Logging.d(TAG, "Found target encoder for mime " + mime + " : " + name + ". Color: 0x"
+ Integer.toHexString(codecColorFormat) + ". Bitrate adjustment: "
+ bitrateAdjustmentType);
return new EncoderProperties(name, codecColorFormat, bitrateAdjustmentType);
}
}
}
}
return null; // No HW encoder.
}
private void checkOnMediaCodecThread() {
if (mediaCodecThread.getId() != Thread.currentThread().getId()) {
throw new RuntimeException("MediaCodecVideoEncoder previously operated on " + mediaCodecThread
+ " but is now called on " + Thread.currentThread());
}
}
public static void printStackTrace() {
if (runningInstance != null && runningInstance.mediaCodecThread != null) {
StackTraceElement[] mediaCodecStackTraces = runningInstance.mediaCodecThread.getStackTrace();
if (mediaCodecStackTraces.length > 0) {
Logging.d(TAG, "MediaCodecVideoEncoder stacks trace:");
for (StackTraceElement stackTrace : mediaCodecStackTraces) {
Logging.d(TAG, stackTrace.toString());
}
}
}
}
static MediaCodec createByCodecName(String codecName) {
try {
// In the L-SDK this call can throw IOException so in order to work in
// both cases catch an exception.
return MediaCodec.createByCodecName(codecName);
} catch (Exception e) {
return null;
}
}
public boolean initEncode(VideoCodecType type, int profile, int width, int height, int kbps, int fps,
EglBase.Context sharedContext, MediaCodecCallback callback) {
final boolean useSurface = sharedContext != null;
Logging.d(TAG,
"Java initEncode: " + type + ". Profile: " + profile + " : " + width + " x " + height
+ ". @ " + kbps + " kbps. Fps: " + fps + ". Encode from texture : " + useSurface);
this.profile = profile;
this.width = width;
this.height = height;
this.callback = callback;
if (mediaCodecThread != null) {
throw new RuntimeException("Forgot to release()?");
}
EncoderProperties properties = null;
String mime = null;
int keyFrameIntervalSec = 0;
boolean configureH264HighProfile = false;
if (type == VideoCodecType.VIDEO_CODEC_VP8) {
mime = VP8_MIME_TYPE;
properties = findHwEncoder(
VP8_MIME_TYPE, vp8HwList(), useSurface ? supportedSurfaceColorList : supportedColorList);
keyFrameIntervalSec = 100;
} else if (type == VideoCodecType.VIDEO_CODEC_VP9) {
mime = VP9_MIME_TYPE;
properties = findHwEncoder(
VP9_MIME_TYPE, vp9HwList, useSurface ? supportedSurfaceColorList : supportedColorList);
keyFrameIntervalSec = 100;
} else if (type == VideoCodecType.VIDEO_CODEC_H264) {
mime = H264_MIME_TYPE;
properties = findHwEncoder(
H264_MIME_TYPE, h264HwList, useSurface ? supportedSurfaceColorList : supportedColorList);
if (profile == H264Profile.CONSTRAINED_HIGH.getValue()) {
EncoderProperties h264HighProfileProperties = findHwEncoder(H264_MIME_TYPE,
h264HighProfileHwList, useSurface ? supportedSurfaceColorList : supportedColorList);
if (h264HighProfileProperties != null) {
Logging.d(TAG, "High profile H.264 encoder supported.");
configureH264HighProfile = true;
} else {
Logging.d(TAG, "High profile H.264 encoder requested, but not supported. Use baseline.");
}
}
keyFrameIntervalSec = 2;
}
if (properties == null) {
throw new RuntimeException("Can not find HW encoder for " + type);
}
runningInstance = this; // Encoder is now running and can be queried for stack traces.
colorFormat = properties.colorFormat;
bitrateAdjustmentType = properties.bitrateAdjustmentType;
if (bitrateAdjustmentType == BitrateAdjustmentType.FRAMERATE_ADJUSTMENT) {
fps = BITRATE_ADJUSTMENT_FPS;
} else {
fps = Math.min(fps, MAXIMUM_INITIAL_FPS);
}
forcedKeyFrameMs = 0;
lastKeyFrameMs = -1;
if (type == VideoCodecType.VIDEO_CODEC_VP8
&& properties.codecName.startsWith(qcomVp8HwProperties.codecPrefix)) {
if (Build.VERSION.SDK_INT == Build.VERSION_CODES.LOLLIPOP
|| Build.VERSION.SDK_INT == Build.VERSION_CODES.LOLLIPOP_MR1) {
forcedKeyFrameMs = QCOM_VP8_KEY_FRAME_INTERVAL_ANDROID_L_MS;
} else if (Build.VERSION.SDK_INT == Build.VERSION_CODES.M) {
forcedKeyFrameMs = QCOM_VP8_KEY_FRAME_INTERVAL_ANDROID_M_MS;
} else if (Build.VERSION.SDK_INT > Build.VERSION_CODES.M) {
forcedKeyFrameMs = QCOM_VP8_KEY_FRAME_INTERVAL_ANDROID_N_MS;
}
}
Logging.d(TAG, "Color format: " + colorFormat + ". Bitrate adjustment: " + bitrateAdjustmentType
+ ". Key frame interval: " + forcedKeyFrameMs + " . Initial fps: " + fps);
targetBitrateBps = 1000 * kbps;
targetFps = fps;
bitrateAccumulatorMax = targetBitrateBps / 8.0;
bitrateAccumulator = 0;
bitrateObservationTimeMs = 0;
bitrateAdjustmentScaleExp = 0;
mediaCodecThread = Thread.currentThread();
try {
MediaFormat format = MediaFormat.createVideoFormat(mime, width, height);
format.setInteger(MediaFormat.KEY_BIT_RATE, targetBitrateBps);
format.setInteger("bitrate-mode", VIDEO_ControlRateConstant);
format.setInteger(MediaFormat.KEY_COLOR_FORMAT, properties.colorFormat);
format.setInteger(MediaFormat.KEY_FRAME_RATE, targetFps);
format.setInteger(MediaFormat.KEY_I_FRAME_INTERVAL, keyFrameIntervalSec);
if (configureH264HighProfile) {
format.setInteger("profile", VIDEO_AVCProfileHigh);
format.setInteger("level", VIDEO_AVCLevel3);
}
Logging.d(TAG, " Format: " + format);
mediaCodec = createByCodecName(properties.codecName);
this.type = type;
if (mediaCodec == null) {
Logging.e(TAG, "Can not create media encoder");
release();
return false;
}
mediaCodec.configure(format, null, null, MediaCodec.CONFIGURE_FLAG_ENCODE);
if (useSurface) {
eglBase = EglBase.create(sharedContext, EglBase.CONFIG_RECORDABLE);
// Create an input surface and keep a reference since we must release the surface when done.
inputSurface = mediaCodec.createInputSurface();
eglBase.createSurface(inputSurface);
eglBase.makeCurrent();
drawer = new GlRectDrawer();
}
mediaCodec.start();
outputBuffers = mediaCodec.getOutputBuffers();
Logging.d(TAG, "Output buffers: " + outputBuffers.length);
} catch (IllegalStateException e) {
Logging.e(TAG, "initEncode failed", e);
release();
return false;
}
running = true;
outputThread = createOutputThread();
outputThread.start();
return true;
}
ByteBuffer[] getInputBuffers() {
ByteBuffer[] inputBuffers = mediaCodec.getInputBuffers();
Logging.d(TAG, "Input buffers: " + inputBuffers.length);
return inputBuffers;
}
void checkKeyFrameRequired(boolean requestedKeyFrame, long presentationTimestampUs) {
long presentationTimestampMs = (presentationTimestampUs + 500) / 1000;
if (lastKeyFrameMs < 0) {
lastKeyFrameMs = presentationTimestampMs;
}
boolean forcedKeyFrame = false;
if (!requestedKeyFrame && forcedKeyFrameMs > 0
&& presentationTimestampMs > lastKeyFrameMs + forcedKeyFrameMs) {
forcedKeyFrame = true;
}
if (requestedKeyFrame || forcedKeyFrame) {
// Ideally MediaCodec would honor BUFFER_FLAG_SYNC_FRAME so we could
// indicate this in queueInputBuffer() below and guarantee _this_ frame
// be encoded as a key frame, but sadly that flag is ignored. Instead,
// we request a key frame "soon".
if (requestedKeyFrame) {
Logging.d(TAG, "Sync frame request");
} else {
Logging.d(TAG, "Sync frame forced");
}
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT) {
Bundle b = new Bundle();
b.putInt(MediaCodec.PARAMETER_KEY_REQUEST_SYNC_FRAME, 0);
mediaCodec.setParameters(b);
}
lastKeyFrameMs = presentationTimestampMs;
}
}
boolean encodeBuffer(
boolean isKeyframe, int inputBuffer, int size, long presentationTimestampUs) {
checkOnMediaCodecThread();
try {
checkKeyFrameRequired(isKeyframe, presentationTimestampUs);
mediaCodec.queueInputBuffer(inputBuffer, 0, size, presentationTimestampUs, 0);
return true;
} catch (IllegalStateException e) {
Logging.e(TAG, "encodeBuffer failed", e);
return false;
}
}
public boolean encodeTexture(boolean isKeyframe, int oesTextureId, float[] transformationMatrix,
long presentationTimestampUs) {
checkOnMediaCodecThread();
try {
checkKeyFrameRequired(isKeyframe, presentationTimestampUs);
// makeCurrent once when create eglBase is enough
//eglBase.makeCurrent();
// TODO(perkj): glClear() shouldn't be necessary since every pixel is covered anyway,
// but it's a workaround for bug webrtc:5147.
GLES20.glClear(GLES20.GL_COLOR_BUFFER_BIT);
drawer.drawOes(oesTextureId, transformationMatrix, width, height, 0, 0, width, height);
eglBase.swapBuffers(TimeUnit.MICROSECONDS.toNanos(presentationTimestampUs));
return true;
} catch (RuntimeException e) {
Logging.e(TAG, "encodeTexture failed", e);
return false;
}
}
/**
* Encodes a new style VideoFrame. Called by JNI. |bufferIndex| is -1 if we are not encoding in
* surface mode.
*/
boolean encodeFrame(long nativeEncoder, boolean isKeyframe, VideoFrame frame, int bufferIndex) {
checkOnMediaCodecThread();
try {
long presentationTimestampUs = TimeUnit.NANOSECONDS.toMicros(frame.getTimestampNs());
checkKeyFrameRequired(isKeyframe, presentationTimestampUs);
VideoFrame.Buffer buffer = frame.getBuffer();
if (buffer instanceof VideoFrame.TextureBuffer) {
VideoFrame.TextureBuffer textureBuffer = (VideoFrame.TextureBuffer) buffer;
eglBase.makeCurrent();
// TODO(perkj): glClear() shouldn't be necessary since every pixel is covered anyway,
// but it's a workaround for bug webrtc:5147.
GLES20.glClear(GLES20.GL_COLOR_BUFFER_BIT);
drawer.drawOes(textureBuffer.getTextureId(),
RendererCommon.convertMatrixFromAndroidGraphicsMatrix(
textureBuffer.getTransformMatrix()),
width, height, 0, 0, width, height);
eglBase.swapBuffers(frame.getTimestampNs());
} else {
VideoFrame.I420Buffer i420Buffer = buffer.toI420();
nativeFillBuffer(nativeEncoder, bufferIndex, i420Buffer.getDataY(), i420Buffer.getStrideY(),
i420Buffer.getDataU(), i420Buffer.getStrideU(), i420Buffer.getDataV(),
i420Buffer.getStrideV());
i420Buffer.release();
// I420 consists of one full-resolution and two half-resolution planes.
// 1 + 1 / 4 + 1 / 4 = 3 / 2
int yuvSize = width * height * 3 / 2;
mediaCodec.queueInputBuffer(bufferIndex, 0, yuvSize, presentationTimestampUs, 0);
}
return true;
} catch (RuntimeException e) {
Logging.e(TAG, "encodeFrame failed", e);
return false;
}
}
public void release() {
Logging.d(TAG, "Java releaseEncoder");
checkOnMediaCodecThread();
class CaughtException {
Exception e;
}
final CaughtException caughtException = new CaughtException();
boolean stopHung = false;
running = false;
ThreadUtils.joinUninterruptibly(outputThread);
if (mediaCodec != null) {
// Run Mediacodec stop() and release() on separate thread since sometime
// Mediacodec.stop() may hang.
final CountDownLatch releaseDone = new CountDownLatch(1);
Runnable runMediaCodecRelease = new Runnable() {
@Override
public void run() {
Logging.d(TAG, "Java releaseEncoder on release thread");
try {
mediaCodec.stop();
} catch (Exception e) {
Logging.e(TAG, "Media encoder stop failed", e);
}
try {
mediaCodec.release();
} catch (Exception e) {
Logging.e(TAG, "Media encoder release failed", e);
caughtException.e = e;
}
Logging.d(TAG, "Java releaseEncoder on release thread done");
releaseDone.countDown();
}
};
new Thread(runMediaCodecRelease).start();
if (!ThreadUtils.awaitUninterruptibly(releaseDone, MEDIA_CODEC_RELEASE_TIMEOUT_MS)) {
Logging.e(TAG, "Media encoder release timeout");
stopHung = true;
}
mediaCodec = null;
}
mediaCodecThread = null;
if (drawer != null) {
drawer.release();
drawer = null;
}
if (eglBase != null) {
eglBase.release();
eglBase = null;
}
if (inputSurface != null) {
inputSurface.release();
inputSurface = null;
}
runningInstance = null;
if (stopHung) {
codecErrors++;
if (errorCallback != null) {
Logging.e(TAG, "Invoke codec error callback. Errors: " + codecErrors);
errorCallback.onMediaCodecVideoEncoderCriticalError(codecErrors);
}
throw new RuntimeException("Media encoder release timeout.");
}
// Re-throw any runtime exception caught inside the other thread. Since this is an invoke, add
// stack trace for the waiting thread as well.
if (caughtException.e != null) {
final RuntimeException runtimeException = new RuntimeException(caughtException.e);
runtimeException.setStackTrace(ThreadUtils.concatStackTraces(
caughtException.e.getStackTrace(), runtimeException.getStackTrace()));
throw runtimeException;
}
Logging.d(TAG, "Java releaseEncoder done");
}
private boolean setRates(int kbps, int frameRate) {
checkOnMediaCodecThread();
int codecBitrateBps = 1000 * kbps;
if (bitrateAdjustmentType == BitrateAdjustmentType.DYNAMIC_ADJUSTMENT) {
bitrateAccumulatorMax = codecBitrateBps / 8.0;
if (targetBitrateBps > 0 && codecBitrateBps < targetBitrateBps) {
// Rescale the accumulator level if the accumulator max decreases
bitrateAccumulator = bitrateAccumulator * codecBitrateBps / targetBitrateBps;
}
}
targetBitrateBps = codecBitrateBps;
targetFps = frameRate;
// Adjust actual encoder bitrate based on bitrate adjustment type.
if (bitrateAdjustmentType == BitrateAdjustmentType.FRAMERATE_ADJUSTMENT && targetFps > 0) {
codecBitrateBps = BITRATE_ADJUSTMENT_FPS * targetBitrateBps / targetFps;
Logging.v(TAG,
"setRates: " + kbps + " -> " + (codecBitrateBps / 1000) + " kbps. Fps: " + targetFps);
} else if (bitrateAdjustmentType == BitrateAdjustmentType.DYNAMIC_ADJUSTMENT) {
Logging.v(TAG, "setRates: " + kbps + " kbps. Fps: " + targetFps + ". ExpScale: "
+ bitrateAdjustmentScaleExp);
if (bitrateAdjustmentScaleExp != 0) {
codecBitrateBps = (int) (codecBitrateBps * getBitrateScale(bitrateAdjustmentScaleExp));
}
} else {
Logging.v(TAG, "setRates: " + kbps + " kbps. Fps: " + targetFps);
}
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT) {
try {
Bundle params = new Bundle();
params.putInt(MediaCodec.PARAMETER_KEY_VIDEO_BITRATE, codecBitrateBps);
mediaCodec.setParameters(params);
return true;
} catch (IllegalStateException e) {
Logging.e(TAG, "setRates failed", e);
return false;
}
} else {
return false;
}
}
// Dequeue an input buffer and return its index, -1 if no input buffer is
// available, or -2 if the codec is no longer operative.
int dequeueInputBuffer() {
checkOnMediaCodecThread();
try {
return mediaCodec.dequeueInputBuffer(DEQUEUE_TIMEOUT);
} catch (IllegalStateException e) {
Logging.e(TAG, "dequeueIntputBuffer failed", e);
return -2;
}
}
// Helper struct for dequeueOutputBuffer() below.
public static class OutputBufferInfo {
private int index;
private ByteBuffer buffer;
private int size;
private boolean isKeyFrame;
private long presentationTimestampUs;
private OutputBufferInfo fill(
int index, ByteBuffer buffer, int size, boolean isKeyFrame, long presentationTimestampUs) {
this.index = index;
this.buffer = buffer;
this.size = size;
this.isKeyFrame = isKeyFrame;
this.presentationTimestampUs = presentationTimestampUs;
return this;
}
public int index() {
return index;
}
public ByteBuffer buffer() {
return buffer;
}
public int size() {
return size;
}
public boolean isKeyFrame() {
return isKeyFrame;
}
public long presentationTimestampUs() {
return presentationTimestampUs;
}
}
private Thread createOutputThread() {
return new Thread() {
@Override
public void run() {
while (running) {
deliverEncodedImage();
}
}
};
}
private void deliverEncodedImage() {
try {
int index = mediaCodec.dequeueOutputBuffer(outputBufferInfo,
OUTPUT_THREAD_DEQUEUE_TIMEOUT_US);
if (index < 0) {
if (index == MediaCodec.INFO_OUTPUT_FORMAT_CHANGED) {
callback.onOutputFormatChanged(mediaCodec, mediaCodec.getOutputFormat());
}
return;
}
ByteBuffer codecOutputBuffer = mediaCodec.getOutputBuffers()[index];
codecOutputBuffer.position(outputBufferInfo.offset);
codecOutputBuffer.limit(outputBufferInfo.offset + outputBufferInfo.size);
if ((outputBufferInfo.flags & MediaCodec.BUFFER_FLAG_CODEC_CONFIG) != 0) {
Logging.d(TAG, "Config frame generated. Offset: " + outputBufferInfo.offset
+ ". Size: " + outputBufferInfo.size);
configData = ByteBuffer.allocateDirect(outputBufferInfo.size);
configData.put(codecOutputBuffer);
// Log few SPS header bytes to check profile and level.
String spsData = "";
for (int i = 0; i < (outputBufferInfo.size < 8 ? outputBufferInfo.size : 8); i++) {
spsData += Integer.toHexString(configData.get(i) & 0xff) + " ";
}
Logging.d(TAG, spsData);
} else {
reportEncodedFrame(outputBufferInfo.size);
// Check key frame flag.
boolean isKeyFrame = (outputBufferInfo.flags & MediaCodec.BUFFER_FLAG_SYNC_FRAME) != 0;
if (isKeyFrame && type == VideoCodecType.VIDEO_CODEC_H264) {
// For H.264 key frame append SPS and PPS NALs at the start
if (keyFrameData.capacity() < configData.capacity() + outputBufferInfo.size) {
// allocate double size
int newSize = Math.max(keyFrameData.capacity() * 2,
configData.capacity() + outputBufferInfo.size);
keyFrameData = ByteBuffer.allocateDirect(newSize);
}
keyFrameData.position(0);
configData.rewind();
keyFrameData.put(configData);
keyFrameData.put(codecOutputBuffer);
keyFrameData.position(0);
outputFrame.fill(index, keyFrameData, configData.capacity() + outputBufferInfo.size,
isKeyFrame, outputBufferInfo.presentationTimeUs);
callback.onEncodedFrame(outputFrame, outputBufferInfo);
releaseOutputBuffer(index);
} else {
outputFrame.fill(index, codecOutputBuffer, outputBufferInfo.size, isKeyFrame,
outputBufferInfo.presentationTimeUs);
callback.onEncodedFrame(outputFrame, outputBufferInfo);
releaseOutputBuffer(index);
}
}
} catch (IllegalStateException e) {
Logging.e(TAG, "deliverOutput failed", e);
}
}
private double getBitrateScale(int bitrateAdjustmentScaleExp) {
return Math.pow(BITRATE_CORRECTION_MAX_SCALE,
(double) bitrateAdjustmentScaleExp / BITRATE_CORRECTION_STEPS);
}
private void reportEncodedFrame(int size) {
if (targetFps == 0 || bitrateAdjustmentType != BitrateAdjustmentType.DYNAMIC_ADJUSTMENT) {
return;
}
// Accumulate the difference between actial and expected frame sizes.
double expectedBytesPerFrame = targetBitrateBps / (8.0 * targetFps);
bitrateAccumulator += (size - expectedBytesPerFrame);
bitrateObservationTimeMs += 1000.0 / targetFps;
// Put a cap on the accumulator, i.e., don't let it grow beyond some level to avoid
// using too old data for bitrate adjustment.
double bitrateAccumulatorCap = BITRATE_CORRECTION_SEC * bitrateAccumulatorMax;
bitrateAccumulator = Math.min(bitrateAccumulator, bitrateAccumulatorCap);
bitrateAccumulator = Math.max(bitrateAccumulator, -bitrateAccumulatorCap);
// Do bitrate adjustment every 3 seconds if actual encoder bitrate deviates too much
// form the target value.
if (bitrateObservationTimeMs > 1000 * BITRATE_CORRECTION_SEC) {
Logging.d(TAG, "Acc: " + (int) bitrateAccumulator + ". Max: " + (int) bitrateAccumulatorMax
+ ". ExpScale: " + bitrateAdjustmentScaleExp);
boolean bitrateAdjustmentScaleChanged = false;
if (bitrateAccumulator > bitrateAccumulatorMax) {
// Encoder generates too high bitrate - need to reduce the scale.
int bitrateAdjustmentInc = (int) (bitrateAccumulator / bitrateAccumulatorMax + 0.5);
bitrateAdjustmentScaleExp -= bitrateAdjustmentInc;
bitrateAccumulator = bitrateAccumulatorMax;
bitrateAdjustmentScaleChanged = true;
} else if (bitrateAccumulator < -bitrateAccumulatorMax) {
// Encoder generates too low bitrate - need to increase the scale.
int bitrateAdjustmentInc = (int) (-bitrateAccumulator / bitrateAccumulatorMax + 0.5);
bitrateAdjustmentScaleExp += bitrateAdjustmentInc;
bitrateAccumulator = -bitrateAccumulatorMax;
bitrateAdjustmentScaleChanged = true;
}
if (bitrateAdjustmentScaleChanged) {
bitrateAdjustmentScaleExp = Math.min(bitrateAdjustmentScaleExp, BITRATE_CORRECTION_STEPS);
bitrateAdjustmentScaleExp = Math.max(bitrateAdjustmentScaleExp, -BITRATE_CORRECTION_STEPS);
Logging.d(TAG, "Adjusting bitrate scale to " + bitrateAdjustmentScaleExp + ". Value: "
+ getBitrateScale(bitrateAdjustmentScaleExp));
setRates(targetBitrateBps / 1000, targetFps);
}
bitrateObservationTimeMs = 0;
}
}
// 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) {
try {
mediaCodec.releaseOutputBuffer(index, false);
return true;
} catch (IllegalStateException e) {
Logging.e(TAG, "releaseOutputBuffer failed", e);
return false;
}
}
/** Fills an inputBuffer with the given index with data from the byte buffers. */
private static native void nativeFillBuffer(long nativeEncoder, int inputBuffer, ByteBuffer dataY,
int strideY, ByteBuffer dataU, int strideU, ByteBuffer dataV, int strideV);
}
