Move talk/app/webrtc to webrtc/api

talk/app/webrtc/java/src/org/webrtc/MediaCodecVideoEncoder.java

Index: talk/app/webrtc/java/src/org/webrtc/MediaCodecVideoEncoder.java
diff --git a/talk/app/webrtc/java/src/org/webrtc/MediaCodecVideoEncoder.java b/talk/app/webrtc/java/src/org/webrtc/MediaCodecVideoEncoder.java
deleted file mode 100644
index 8b8ee71dfee4adbae8176486e078eb210060a7b8..0000000000000000000000000000000000000000
--- a/talk/app/webrtc/java/src/org/webrtc/MediaCodecVideoEncoder.java
+++ /dev/null
@@ -1,602 +0,0 @@
-/*
- * libjingle
- * Copyright 2013 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.annotation.TargetApi;
-import android.media.MediaCodec;
-import android.media.MediaCodecInfo.CodecCapabilities;
-import android.media.MediaCodecInfo;
-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 org.webrtc.Logging;
-
-import java.nio.ByteBuffer;
-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.
-@TargetApi(19)
-@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.
-  // 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 EglBase14 eglBase;
-  private int width;
-  private int height;
-  private Surface inputSurface;
-  private GlRectDrawer drawer;
-  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";
-  // List of supported HW VP8 codecs.
-  private static final String[] supportedVp8HwCodecPrefixes =
-    {"OMX.qcom.", "OMX.Intel." };
-  // List of supported HW VP9 decoders.
-  private static final String[] supportedVp9HwCodecPrefixes =
-    {"OMX.qcom."};
-  // List of supported HW H.264 codecs.
-  private static final String[] supportedH264HwCodecPrefixes =
-    {"OMX.qcom." };
-  // List of devices with poor H.264 encoder quality.
-  private static final String[] H264_HW_EXCEPTION_MODELS = new String[] {
-    // HW H.264 encoder on below devices has poor bitrate control - actual
-    // bitrates deviates a lot from the target value.
-    "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.
-
-  // 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, supportedVp8HwCodecPrefixes, supportedColorList) != null);
-  }
-
-  public static boolean isVp9HwSupported() {
-    return !hwEncoderDisabledTypes.contains(VP9_MIME_TYPE) &&
-        (findHwEncoder(VP9_MIME_TYPE, supportedVp9HwCodecPrefixes, supportedColorList) != null);
-  }
-
-  public static boolean isH264HwSupported() {
-    return !hwEncoderDisabledTypes.contains(H264_MIME_TYPE) &&
-        (findHwEncoder(H264_MIME_TYPE, supportedH264HwCodecPrefixes, supportedColorList) != null);
-  }
-
-  public static boolean isVp8HwSupportedUsingTextures() {
-    return !hwEncoderDisabledTypes.contains(VP8_MIME_TYPE) && (findHwEncoder(
-        VP8_MIME_TYPE, supportedVp8HwCodecPrefixes, supportedSurfaceColorList) != null);
-  }
-
-  public static boolean isVp9HwSupportedUsingTextures() {
-    return !hwEncoderDisabledTypes.contains(VP9_MIME_TYPE) && (findHwEncoder(
-        VP9_MIME_TYPE, supportedVp9HwCodecPrefixes, supportedSurfaceColorList) != null);
-  }
-
-  public static boolean isH264HwSupportedUsingTextures() {
-    return !hwEncoderDisabledTypes.contains(H264_MIME_TYPE) && (findHwEncoder(
-        H264_MIME_TYPE, supportedH264HwCodecPrefixes, supportedSurfaceColorList) != null);
-  }
-
-  // Helper struct for findHwEncoder() below.
-  private static class EncoderProperties {
-    public EncoderProperties(String codecName, int colorFormat) {
-      this.codecName = codecName;
-      this.colorFormat = colorFormat;
-    }
-    public final String codecName; // OpenMax component name for HW codec.
-    public final int colorFormat;  // Color format supported by codec.
-  }
-
-  private static EncoderProperties findHwEncoder(
-      String mime, String[] supportedHwCodecPrefixes, 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 = MediaCodecList.getCodecInfoAt(i);
-      if (!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;
-      for (String hwCodecPrefix : supportedHwCodecPrefixes) {
-        if (name.startsWith(hwCodecPrefix)) {
-          supportedCodec = true;
-          break;
-        }
-      }
-      if (!supportedCodec) {
-        continue;
-      }
-
-      CodecCapabilities capabilities = info.getCapabilitiesForType(mime);
-      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));
-            return new EncoderProperties(name, codecColorFormat);
-          }
-        }
-      }
-    }
-    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;
-    }
-  }
-
-  boolean initEncode(VideoCodecType type, int width, int height, int kbps, int fps,
-      EglBase14.Context sharedContext) {
-    final boolean useSurface = sharedContext != null;
-    Logging.d(TAG, "Java initEncode: " + type + " : " + width + " x " + height +
-        ". @ " + kbps + " kbps. Fps: " + fps + ". Encode from texture : " + useSurface);
-
-    this.width = width;
-    this.height = height;
-    if (mediaCodecThread != null) {
-      throw new RuntimeException("Forgot to release()?");
-    }
-    EncoderProperties properties = null;
-    String mime = null;
-    int keyFrameIntervalSec = 0;
-    if (type == VideoCodecType.VIDEO_CODEC_VP8) {
-      mime = VP8_MIME_TYPE;
-      properties = findHwEncoder(VP8_MIME_TYPE, supportedVp8HwCodecPrefixes,
-          useSurface ? supportedSurfaceColorList : supportedColorList);
-      keyFrameIntervalSec = 100;
-    } else if (type == VideoCodecType.VIDEO_CODEC_VP9) {
-      mime = VP9_MIME_TYPE;
-      properties = findHwEncoder(VP9_MIME_TYPE, supportedH264HwCodecPrefixes,
-          useSurface ? supportedSurfaceColorList : supportedColorList);
-      keyFrameIntervalSec = 100;
-    } else if (type == VideoCodecType.VIDEO_CODEC_H264) {
-      mime = H264_MIME_TYPE;
-      properties = findHwEncoder(H264_MIME_TYPE, supportedH264HwCodecPrefixes,
-          useSurface ? supportedSurfaceColorList : supportedColorList);
-      keyFrameIntervalSec = 20;
-    }
-    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;
-    Logging.d(TAG, "Color format: " + colorFormat);
-
-    mediaCodecThread = Thread.currentThread();
-    try {
-      MediaFormat format = MediaFormat.createVideoFormat(mime, width, height);
-      format.setInteger(MediaFormat.KEY_BIT_RATE, 1000 * kbps);
-      format.setInteger("bitrate-mode", VIDEO_ControlRateConstant);
-      format.setInteger(MediaFormat.KEY_COLOR_FORMAT, properties.colorFormat);
-      format.setInteger(MediaFormat.KEY_FRAME_RATE, fps);
-      format.setInteger(MediaFormat.KEY_I_FRAME_INTERVAL, keyFrameIntervalSec);
-      Logging.d(TAG, "  Format: " + format);
-      mediaCodec = createByCodecName(properties.codecName);
-      this.type = type;
-      if (mediaCodec == null) {
-        Logging.e(TAG, "Can not create media encoder");
-        return false;
-      }
-      mediaCodec.configure(
-          format, null, null, MediaCodec.CONFIGURE_FLAG_ENCODE);
-
-      if (useSurface) {
-        eglBase = new EglBase14(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);
-        drawer = new GlRectDrawer();
-      }
-      mediaCodec.start();
-      outputBuffers = mediaCodec.getOutputBuffers();
-      Logging.d(TAG, "Output buffers: " + outputBuffers.length);
-
-    } catch (IllegalStateException e) {
-      Logging.e(TAG, "initEncode failed", e);
-      return false;
-    }
-    return true;
-  }
-
-  ByteBuffer[]  getInputBuffers() {
-    ByteBuffer[] inputBuffers = mediaCodec.getInputBuffers();
-    Logging.d(TAG, "Input buffers: " + inputBuffers.length);
-    return inputBuffers;
-  }
-
-  boolean encodeBuffer(
-      boolean isKeyframe, int inputBuffer, int size,
-      long presentationTimestampUs) {
-    checkOnMediaCodecThread();
-    try {
-      if (isKeyframe) {
-        // 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".
-        Logging.d(TAG, "Sync frame request");
-        Bundle b = new Bundle();
-        b.putInt(MediaCodec.PARAMETER_KEY_REQUEST_SYNC_FRAME, 0);
-        mediaCodec.setParameters(b);
-      }
-      mediaCodec.queueInputBuffer(
-          inputBuffer, 0, size, presentationTimestampUs, 0);
-      return true;
-    }
-    catch (IllegalStateException e) {
-      Logging.e(TAG, "encodeBuffer failed", e);
-      return false;
-    }
-  }
-
-  boolean encodeTexture(boolean isKeyframe, int oesTextureId, float[] transformationMatrix,
-      long presentationTimestampUs) {
-    checkOnMediaCodecThread();
-    try {
-      if (isKeyframe) {
-        Logging.d(TAG, "Sync frame request");
-        Bundle b = new Bundle();
-        b.putInt(MediaCodec.PARAMETER_KEY_REQUEST_SYNC_FRAME, 0);
-        mediaCodec.setParameters(b);
-      }
-      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, 0, 0, width, height);
-      eglBase.swapBuffers(TimeUnit.MICROSECONDS.toNanos(presentationTimestampUs));
-      return true;
-    }
-    catch (RuntimeException e) {
-      Logging.e(TAG, "encodeTexture failed", e);
-      return false;
-    }
-  }
-
-  void release() {
-    Logging.d(TAG, "Java releaseEncoder");
-    checkOnMediaCodecThread();
-
-    // 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() {
-        try {
-          Logging.d(TAG, "Java releaseEncoder on release thread");
-          mediaCodec.stop();
-          mediaCodec.release();
-          Logging.d(TAG, "Java releaseEncoder on release thread done");
-        } catch (Exception e) {
-          Logging.e(TAG, "Media encoder release failed", e);
-        }
-        releaseDone.countDown();
-      }
-    };
-    new Thread(runMediaCodecRelease).start();
-
-    if (!ThreadUtils.awaitUninterruptibly(releaseDone, MEDIA_CODEC_RELEASE_TIMEOUT_MS)) {
-      Logging.e(TAG, "Media encoder release timeout");
-      codecErrors++;
-      if (errorCallback != null) {
-        Logging.e(TAG, "Invoke codec error callback. Errors: " + codecErrors);
-        errorCallback.onMediaCodecVideoEncoderCriticalError(codecErrors);
-      }
-    }
-
-    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;
-    Logging.d(TAG, "Java releaseEncoder done");
-  }
-
-  private boolean setRates(int kbps, int frameRateIgnored) {
-    // frameRate argument is ignored - HW encoder is supposed to use
-    // video frame timestamps for bit allocation.
-    checkOnMediaCodecThread();
-    Logging.v(TAG, "setRates: " + kbps + " kbps. Fps: " + frameRateIgnored);
-    try {
-      Bundle params = new Bundle();
-      params.putInt(MediaCodec.PARAMETER_KEY_VIDEO_BITRATE, 1000 * kbps);
-      mediaCodec.setParameters(params);
-      return true;
-    } catch (IllegalStateException e) {
-      Logging.e(TAG, "setRates failed", e);
-      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.
-  static class OutputBufferInfo {
-    public OutputBufferInfo(
-        int index, ByteBuffer buffer,
-        boolean isKeyFrame, long presentationTimestampUs) {
-      this.index = index;
-      this.buffer = buffer;
-      this.isKeyFrame = isKeyFrame;
-      this.presentationTimestampUs = presentationTimestampUs;
-    }
-
-    public final int index;
-    public final ByteBuffer buffer;
-    public final boolean isKeyFrame;
-    public final long presentationTimestampUs;
-  }
-
-  // Dequeue and return an output buffer, or null if no output is ready.  Return
-  // a fake OutputBufferInfo with index -1 if the codec is no longer operable.
-  OutputBufferInfo dequeueOutputBuffer() {
-    checkOnMediaCodecThread();
-    try {
-      MediaCodec.BufferInfo info = new MediaCodec.BufferInfo();
-      int result = mediaCodec.dequeueOutputBuffer(info, DEQUEUE_TIMEOUT);
-      // Check if this is config frame and save configuration data.
-      if (result >= 0) {
-        boolean isConfigFrame =
-            (info.flags & MediaCodec.BUFFER_FLAG_CODEC_CONFIG) != 0;
-        if (isConfigFrame) {
-          Logging.d(TAG, "Config frame generated. Offset: " + info.offset +
-              ". Size: " + info.size);
-          configData = ByteBuffer.allocateDirect(info.size);
-          outputBuffers[result].position(info.offset);
-          outputBuffers[result].limit(info.offset + info.size);
-          configData.put(outputBuffers[result]);
-          // Release buffer back.
-          mediaCodec.releaseOutputBuffer(result, false);
-          // Query next output.
-          result = mediaCodec.dequeueOutputBuffer(info, DEQUEUE_TIMEOUT);
-        }
-      }
-      if (result >= 0) {
-        // MediaCodec doesn't care about Buffer position/remaining/etc so we can
-        // mess with them to get a slice and avoid having to pass extra
-        // (BufferInfo-related) parameters back to C++.
-        ByteBuffer outputBuffer = outputBuffers[result].duplicate();
-        outputBuffer.position(info.offset);
-        outputBuffer.limit(info.offset + info.size);
-        // Check key frame flag.
-        boolean isKeyFrame =
-            (info.flags & MediaCodec.BUFFER_FLAG_SYNC_FRAME) != 0;
-        if (isKeyFrame) {
-          Logging.d(TAG, "Sync frame generated");
-        }
-        if (isKeyFrame && type == VideoCodecType.VIDEO_CODEC_H264) {
-          Logging.d(TAG, "Appending config frame of size " + configData.capacity() +
-              " to output buffer with offset " + info.offset + ", size " +
-              info.size);
-          // For H.264 key frame append SPS and PPS NALs at the start
-          ByteBuffer keyFrameBuffer = ByteBuffer.allocateDirect(
-              configData.capacity() + info.size);
-          configData.rewind();
-          keyFrameBuffer.put(configData);
-          keyFrameBuffer.put(outputBuffer);
-          keyFrameBuffer.position(0);
-          return new OutputBufferInfo(result, keyFrameBuffer,
-              isKeyFrame, info.presentationTimeUs);
-        } else {
-          return new OutputBufferInfo(result, outputBuffer.slice(),
-              isKeyFrame, info.presentationTimeUs);
-        }
-      } else if (result == MediaCodec.INFO_OUTPUT_BUFFERS_CHANGED) {
-        outputBuffers = mediaCodec.getOutputBuffers();
-        return dequeueOutputBuffer();
-      } else if (result == MediaCodec.INFO_OUTPUT_FORMAT_CHANGED) {
-        return dequeueOutputBuffer();
-      } else if (result == MediaCodec.INFO_TRY_AGAIN_LATER) {
-        return null;
-      }
-      throw new RuntimeException("dequeueOutputBuffer: " + result);
-    } catch (IllegalStateException e) {
-      Logging.e(TAG, "dequeueOutputBuffer failed", e);
-      return new OutputBufferInfo(-1, null, false, -1);
-    }
-  }
-
-  // Release a dequeued output buffer back to the codec for re-use.  Return
-  // false if the codec is no longer operable.
-  boolean releaseOutputBuffer(int index) {
-    checkOnMediaCodecThread();
-    try {
-      mediaCodec.releaseOutputBuffer(index, false);
-      return true;
-    } catch (IllegalStateException e) {
-      Logging.e(TAG, "releaseOutputBuffer failed", e);
-      return false;
-    }
-  }
-}