Begin refactor of AVDA to support zero-copy.

content/common/gpu/media/android_video_decode_accelerator.cc

 // Copyright (c) 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "content/common/gpu/media/android_video_decode_accelerator.h"
 
 #include "base/bind.h"
 #include "base/logging.h"
 #include "base/message_loop/message_loop.h"
 #include "base/metrics/histogram.h"
 #include "content/common/gpu/gpu_channel.h"
+#include "content/common/gpu/media/avda_return_on_failure.h"
 #include "gpu/command_buffer/service/gles2_cmd_decoder.h"
 #include "media/base/bitstream_buffer.h"
 #include "media/base/limits.h"
 #include "media/base/video_decoder_config.h"
 #include "media/video/picture.h"
-#include "ui/gl/android/scoped_java_surface.h"
 #include "ui/gl/android/surface_texture.h"
 #include "ui/gl/gl_bindings.h"
 
 namespace content {
 
-// Helper macros for dealing with failure.  If |result| evaluates false, emit
-// |log| to ERROR, register |error| with the decoder, and return.
-#define RETURN_ON_FAILURE(result, log, error)                     \
-  do {                                                            \
-    if (!(result)) {                                              \
-      DLOG(ERROR) << log;                                         \
-      base::MessageLoop::current()->PostTask(                     \
-          FROM_HERE,                                              \
-          base::Bind(&AndroidVideoDecodeAccelerator::NotifyError, \
-                     weak_this_factory_.GetWeakPtr(),             \
-                     error));                                     \
-      state_ = ERROR;                                             \
-      return;                                                     \
-    }                                                             \
-  } while (0)
-
 // TODO(dwkang): We only need kMaxVideoFrames to pass media stack's prerolling
 // phase, but 1 is added due to crbug.com/176036. This should be tuned when we
 // have actual use case.
 enum { kNumPictureBuffers = media::limits::kMaxVideoFrames + 1 };
 
-// Max number of bitstreams notified to the client with
-// NotifyEndOfBitstreamBuffer() before getting output from the bitstream.
-enum { kMaxBitstreamsNotifiedInAdvance = 32 };
-
-#if defined(ENABLE_MEDIA_PIPELINE_ON_ANDROID)
-// MediaCodec is only guaranteed to support baseline, but some devices may
-// support others. Advertise support for all H264 profiles and let the
-// MediaCodec fail when decoding if it's not actually supported. It's assumed
-// that consumers won't have software fallback for H264 on Android anyway.
-static const media::VideoCodecProfile kSupportedH264Profiles[] = {
-  media::H264PROFILE_BASELINE,
-  media::H264PROFILE_MAIN,
-  media::H264PROFILE_EXTENDED,
-  media::H264PROFILE_HIGH,
-  media::H264PROFILE_HIGH10PROFILE,
-  media::H264PROFILE_HIGH422PROFILE,
-  media::H264PROFILE_HIGH444PREDICTIVEPROFILE,
-  media::H264PROFILE_SCALABLEBASELINE,
-  media::H264PROFILE_SCALABLEHIGH,
-  media::H264PROFILE_STEREOHIGH,
-  media::H264PROFILE_MULTIVIEWHIGH
-};
-#endif
-
-// Because MediaCodec is thread-hostile (must be poked on a single thread) and
-// has no callback mechanism (b/11990118), we must drive it by polling for
-// complete frames (and available input buffers, when the codec is fully
-// saturated).  This function defines the polling delay.  The value used is an
-// arbitrary choice that trades off CPU utilization (spinning) against latency.
-// Mirrors android_video_encode_accelerator.cc:EncodePollDelay().
-static inline const base::TimeDelta DecodePollDelay() {
-  // An alternative to this polling scheme could be to dedicate a new thread
-  // (instead of using the ChildThread) to run the MediaCodec, and make that
-  // thread use the timeout-based flavor of MediaCodec's dequeue methods when it
-  // believes the codec should complete "soon" (e.g. waiting for an input
-  // buffer, or waiting for a picture when it knows enough complete input
-  // pictures have been fed to saturate any internal buffering).  This is
-  // speculative and it's unclear that this would be a win (nor that there's a
-  // reasonably device-agnostic way to fill in the "believes" above).
-  return base::TimeDelta::FromMilliseconds(10);
-}
-
-static inline const base::TimeDelta NoWaitTimeOut() {
-  return base::TimeDelta::FromMicroseconds(0);
-}
-
 AndroidVideoDecodeAccelerator::AndroidVideoDecodeAccelerator(
     const base::WeakPtr<gpu::gles2::GLES2Decoder> decoder,
     const base::Callback<bool(void)>& make_context_current)
-    : client_(NULL),
-      make_context_current_(make_context_current),
-      codec_(media::kCodecH264),
-      state_(NO_ERROR),
-      surface_texture_id_(0),
-      picturebuffers_requested_(false),
-      gl_decoder_(decoder),
-      weak_this_factory_(this) {}
+    : AndroidVideoDecodeAcceleratorBase(decoder, make_context_current) {
+}
 
 AndroidVideoDecodeAccelerator::~AndroidVideoDecodeAccelerator() {
-  DCHECK(thread_checker_.CalledOnValidThread());
-}
-
-bool AndroidVideoDecodeAccelerator::Initialize(media::VideoCodecProfile profile,
-                                               Client* client) {
-  DCHECK(!media_codec_);
-  DCHECK(thread_checker_.CalledOnValidThread());
-
-  client_ = client;
-  codec_ = VideoCodecProfileToVideoCodec(profile);
-
-  bool profile_supported = codec_ == media::kCodecVP8;
-#if defined(ENABLE_MEDIA_PIPELINE_ON_ANDROID)
-  profile_supported |=
-      (codec_ == media::kCodecVP9 || codec_ == media::kCodecH264);
-#endif
-
-  if (!profile_supported) {
-    LOG(ERROR) << "Unsupported profile: " << profile;
-    return false;
-  }
-
-  // Only use MediaCodec for VP8/9 if it's likely backed by hardware.
-  if ((codec_ == media::kCodecVP8 || codec_ == media::kCodecVP9) &&
-      media::VideoCodecBridge::IsKnownUnaccelerated(
-          codec_, media::MEDIA_CODEC_DECODER)) {
-    DVLOG(1) << "Initialization failed: "
-             << (codec_ == media::kCodecVP8 ? "vp8" : "vp9")
-             << " is not hardware accelerated";
-    return false;
-  }
-
-  if (!make_context_current_.Run()) {
-    LOG(ERROR) << "Failed to make this decoder's GL context current.";
-    return false;
-  }
-
-  if (!gl_decoder_) {
-    LOG(ERROR) << "Failed to get gles2 decoder instance.";
-    return false;
-  }
-  glGenTextures(1, &surface_texture_id_);
-  glActiveTexture(GL_TEXTURE0);
-  glBindTexture(GL_TEXTURE_EXTERNAL_OES, surface_texture_id_);
-
-  glTexParameteri(GL_TEXTURE_EXTERNAL_OES, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
-  glTexParameteri(GL_TEXTURE_EXTERNAL_OES, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
-  glTexParameteri(GL_TEXTURE_EXTERNAL_OES,
-                  GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
-  glTexParameteri(GL_TEXTURE_EXTERNAL_OES,
-                  GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
-  gl_decoder_->RestoreTextureUnitBindings(0);
-  gl_decoder_->RestoreActiveTexture();
-
-  surface_texture_ = gfx::SurfaceTexture::Create(surface_texture_id_);
-
-  if (!ConfigureMediaCodec()) {
-    LOG(ERROR) << "Failed to create MediaCodec instance.";
-    return false;
-  }
-
-  return true;
-}
-
-void AndroidVideoDecodeAccelerator::DoIOTask() {
-  DCHECK(thread_checker_.CalledOnValidThread());
-  if (state_ == ERROR) {
-    return;
-  }
-
-  QueueInput();
-  DequeueOutput();
-}
-
-void AndroidVideoDecodeAccelerator::QueueInput() {
-  DCHECK(thread_checker_.CalledOnValidThread());
-  if (bitstreams_notified_in_advance_.size() > kMaxBitstreamsNotifiedInAdvance)
-    return;
-  if (pending_bitstream_buffers_.empty())
-    return;
-
-  int input_buf_index = 0;
-  media::MediaCodecStatus status = media_codec_->DequeueInputBuffer(
-      NoWaitTimeOut(), &input_buf_index);
-  if (status != media::MEDIA_CODEC_OK) {
-    DCHECK(status == media::MEDIA_CODEC_DEQUEUE_INPUT_AGAIN_LATER ||
-           status == media::MEDIA_CODEC_ERROR);
-    return;
-  }
-
-  base::Time queued_time = pending_bitstream_buffers_.front().second;
-  UMA_HISTOGRAM_TIMES("Media.AVDA.InputQueueTime",
-                      base::Time::Now() - queued_time);
-  media::BitstreamBuffer bitstream_buffer =
-      pending_bitstream_buffers_.front().first;
-  pending_bitstream_buffers_.pop();
-
-  if (bitstream_buffer.id() == -1) {
-    media_codec_->QueueEOS(input_buf_index);
-    return;
-  }
-
-  // Abuse the presentation time argument to propagate the bitstream
-  // buffer ID to the output, so we can report it back to the client in
-  // PictureReady().
-  base::TimeDelta timestamp =
-      base::TimeDelta::FromMicroseconds(bitstream_buffer.id());
-
-  scoped_ptr<base::SharedMemory> shm(
-      new base::SharedMemory(bitstream_buffer.handle(), true));
-
-  RETURN_ON_FAILURE(shm->Map(bitstream_buffer.size()),
-                    "Failed to SharedMemory::Map()",
-                    UNREADABLE_INPUT);
-
-  status =
-      media_codec_->QueueInputBuffer(input_buf_index,
-                                     static_cast<const uint8*>(shm->memory()),
-                                     bitstream_buffer.size(),
-                                     timestamp);
-  RETURN_ON_FAILURE(status == media::MEDIA_CODEC_OK,
-                    "Failed to QueueInputBuffer: " << status,
-                    PLATFORM_FAILURE);
-
-  // We should call NotifyEndOfBitstreamBuffer(), when no more decoded output
-  // will be returned from the bitstream buffer. However, MediaCodec API is
-  // not enough to guarantee it.
-  // So, here, we calls NotifyEndOfBitstreamBuffer() in advance in order to
-  // keep getting more bitstreams from the client, and throttle them by using
-  // |bitstreams_notified_in_advance_|.
-  // TODO(dwkang): check if there is a way to remove this workaround.
-  base::MessageLoop::current()->PostTask(
-      FROM_HERE,
-      base::Bind(&AndroidVideoDecodeAccelerator::NotifyEndOfBitstreamBuffer,
-                 weak_this_factory_.GetWeakPtr(),
-                 bitstream_buffer.id()));
-  bitstreams_notified_in_advance_.push_back(bitstream_buffer.id());
-}
-
-void AndroidVideoDecodeAccelerator::DequeueOutput() {
-  DCHECK(thread_checker_.CalledOnValidThread());
-  if (picturebuffers_requested_ && output_picture_buffers_.empty())
-    return;
-
-  if (!output_picture_buffers_.empty() && free_picture_ids_.empty()) {
-    // Don't have any picture buffer to send. Need to wait more.
-    return;
-  }
-
-  bool eos = false;
-  base::TimeDelta timestamp;
-  int32 buf_index = 0;
-  do {
-    size_t offset = 0;
-    size_t size = 0;
-
-    media::MediaCodecStatus status = media_codec_->DequeueOutputBuffer(
-        NoWaitTimeOut(), &buf_index, &offset, &size, &timestamp, &eos, NULL);
-    switch (status) {
-      case media::MEDIA_CODEC_DEQUEUE_OUTPUT_AGAIN_LATER:
-      case media::MEDIA_CODEC_ERROR:
-        return;
-
-      case media::MEDIA_CODEC_OUTPUT_FORMAT_CHANGED: {
-        int32 width, height;
-        media_codec_->GetOutputFormat(&width, &height);
-
-        if (!picturebuffers_requested_) {
-          picturebuffers_requested_ = true;
-          size_ = gfx::Size(width, height);
-          base::MessageLoop::current()->PostTask(
-              FROM_HERE,
-              base::Bind(&AndroidVideoDecodeAccelerator::RequestPictureBuffers,
-                         weak_this_factory_.GetWeakPtr()));
-        } else {
-          // Dynamic resolution change support is not specified by the Android
-          // platform at and before JB-MR1, so it's not possible to smoothly
-          // continue playback at this point.  Instead, error out immediately,
-          // expecting clients to Reset() as appropriate to avoid this.
-          // b/7093648
-          RETURN_ON_FAILURE(size_ == gfx::Size(width, height),
-                            "Dynamic resolution change is not supported.",
-                            PLATFORM_FAILURE);
-        }
-        return;
-      }
-
-      case media::MEDIA_CODEC_OUTPUT_BUFFERS_CHANGED:
-        break;
-
-      case media::MEDIA_CODEC_OK:
-        DCHECK_GE(buf_index, 0);
-        break;
-
-      default:
-        NOTREACHED();
-        break;
-    }
-  } while (buf_index < 0);
-
-  // This ignores the emitted ByteBuffer and instead relies on rendering to the
-  // codec's SurfaceTexture and then copying from that texture to the client's
-  // PictureBuffer's texture.  This means that each picture's data is written
-  // three times: once to the ByteBuffer, once to the SurfaceTexture, and once
-  // to the client's texture.  It would be nicer to either:
-  // 1) Render directly to the client's texture from MediaCodec (one write); or
-  // 2) Upload the ByteBuffer to the client's texture (two writes).
-  // Unfortunately neither is possible:
-  // 1) MediaCodec's use of SurfaceTexture is a singleton, and the texture
-  //    written to can't change during the codec's lifetime.  b/11990461
-  // 2) The ByteBuffer is likely to contain the pixels in a vendor-specific,
-  //    opaque/non-standard format.  It's not possible to negotiate the decoder
-  //    to emit a specific colorspace, even using HW CSC.  b/10706245
-  // So, we live with these two extra copies per picture :(
-  media_codec_->ReleaseOutputBuffer(buf_index, true);
-
-  if (eos) {
-    base::MessageLoop::current()->PostTask(
-        FROM_HERE,
-        base::Bind(&AndroidVideoDecodeAccelerator::NotifyFlushDone,
-                   weak_this_factory_.GetWeakPtr()));
-  } else {
-    int64 bitstream_buffer_id = timestamp.InMicroseconds();
-    SendCurrentSurfaceToClient(static_cast<int32>(bitstream_buffer_id));
-
-    // Removes ids former or equal than the id from decoder. Note that
-    // |bitstreams_notified_in_advance_| does not mean bitstream ids in decoder
-    // because of frame reordering issue. We just maintain this roughly and use
-    // for the throttling purpose.
-    std::list<int32>::iterator it;
-    for (it = bitstreams_notified_in_advance_.begin();
-        it != bitstreams_notified_in_advance_.end();
-        ++it) {
-      if (*it == bitstream_buffer_id) {
-        bitstreams_notified_in_advance_.erase(
-            bitstreams_notified_in_advance_.begin(), ++it);
-        break;
-      }
-    }
-  }
-}
-
-void AndroidVideoDecodeAccelerator::SendCurrentSurfaceToClient(
-    int32 bitstream_id) {
-  DCHECK(thread_checker_.CalledOnValidThread());
-  DCHECK_NE(bitstream_id, -1);
-  DCHECK(!free_picture_ids_.empty());
-
-  RETURN_ON_FAILURE(make_context_current_.Run(),
-                    "Failed to make this decoder's GL context current.",
-                    PLATFORM_FAILURE);
-
-  int32 picture_buffer_id = free_picture_ids_.front();
-  free_picture_ids_.pop();
-
-  float transfrom_matrix[16];
-  surface_texture_->UpdateTexImage();
-  surface_texture_->GetTransformMatrix(transfrom_matrix);
-
-  OutputBufferMap::const_iterator i =
-      output_picture_buffers_.find(picture_buffer_id);
-  RETURN_ON_FAILURE(i != output_picture_buffers_.end(),
-                    "Can't find a PictureBuffer for " << picture_buffer_id,
-                    PLATFORM_FAILURE);
-  uint32 picture_buffer_texture_id = i->second.texture_id();
-
-  RETURN_ON_FAILURE(gl_decoder_.get(),
-                    "Failed to get gles2 decoder instance.",
-                    ILLEGAL_STATE);
-  // Defer initializing the CopyTextureCHROMIUMResourceManager until it is
-  // needed because it takes 10s of milliseconds to initialize.
-  if (!copier_) {
-    copier_.reset(new gpu::CopyTextureCHROMIUMResourceManager());
-    copier_->Initialize(gl_decoder_.get());
-  }
-
-  // Here, we copy |surface_texture_id_| to the picture buffer instead of
-  // setting new texture to |surface_texture_| by calling attachToGLContext()
-  // because:
-  // 1. Once we call detachFrameGLContext(), it deletes the texture previous
-  //    attached.
-  // 2. SurfaceTexture requires us to apply a transform matrix when we show
-  //    the texture.
-  // TODO(hkuang): get the StreamTexture transform matrix in GPU process
-  // instead of using default matrix crbug.com/226218.
-  const static GLfloat default_matrix[16] = {1.0f, 0.0f, 0.0f, 0.0f,
-                                             0.0f, 1.0f, 0.0f, 0.0f,
-                                             0.0f, 0.0f, 1.0f, 0.0f,
-                                             0.0f, 0.0f, 0.0f, 1.0f};
-  copier_->DoCopyTextureWithTransform(gl_decoder_.get(),
-                                      GL_TEXTURE_EXTERNAL_OES,
-                                      surface_texture_id_,
-                                      picture_buffer_texture_id,
-                                      size_.width(),
-                                      size_.height(),
-                                      false,
-                                      false,
-                                      false,
-                                      default_matrix);
-
-  // TODO(henryhsu): Pass (0, 0) as visible size will cause several test
-  // cases failed. We should make sure |size_| is coded size or visible size.
-  base::MessageLoop::current()->PostTask(
-      FROM_HERE, base::Bind(&AndroidVideoDecodeAccelerator::NotifyPictureReady,
-                            weak_this_factory_.GetWeakPtr(),
-                            media::Picture(picture_buffer_id, bitstream_id,
-                                           gfx::Rect(size_), false)));
-}
-
-void AndroidVideoDecodeAccelerator::Decode(
-    const media::BitstreamBuffer& bitstream_buffer) {
-  DCHECK(thread_checker_.CalledOnValidThread());
-  if (bitstream_buffer.id() != -1 && bitstream_buffer.size() == 0) {
-    base::MessageLoop::current()->PostTask(
-        FROM_HERE,
-        base::Bind(&AndroidVideoDecodeAccelerator::NotifyEndOfBitstreamBuffer,
-                   weak_this_factory_.GetWeakPtr(),
-                   bitstream_buffer.id()));
-    return;
-  }
-
-  pending_bitstream_buffers_.push(
-      std::make_pair(bitstream_buffer, base::Time::Now()));
-
-  DoIOTask();
-}
-
-void AndroidVideoDecodeAccelerator::AssignPictureBuffers(
-    const std::vector<media::PictureBuffer>& buffers) {
-  DCHECK(thread_checker_.CalledOnValidThread());
-  DCHECK(output_picture_buffers_.empty());
-  DCHECK(free_picture_ids_.empty());
-
-  for (size_t i = 0; i < buffers.size(); ++i) {
-    RETURN_ON_FAILURE(buffers[i].size() == size_,
-                      "Invalid picture buffer size was passed.",
-                      INVALID_ARGUMENT);
-    int32 id = buffers[i].id();
-    output_picture_buffers_.insert(std::make_pair(id, buffers[i]));
-    free_picture_ids_.push(id);
-    // Since the client might be re-using |picture_buffer_id| values, forget
-    // about previously-dismissed IDs now.  See ReusePictureBuffer() comment
-    // about "zombies" for why we maintain this set in the first place.
-    dismissed_picture_ids_.erase(id);
-  }
-
-  RETURN_ON_FAILURE(output_picture_buffers_.size() >= kNumPictureBuffers,
-                    "Invalid picture buffers were passed.",
-                    INVALID_ARGUMENT);
-
-  DoIOTask();
-}
-
-void AndroidVideoDecodeAccelerator::ReusePictureBuffer(
-    int32 picture_buffer_id) {
-  DCHECK(thread_checker_.CalledOnValidThread());
-
-  // This ReusePictureBuffer() might have been in a pipe somewhere (queued in
-  // IPC, or in a PostTask either at the sender or receiver) when we sent a
-  // DismissPictureBuffer() for this |picture_buffer_id|.  Account for such
-  // potential "zombie" IDs here.
-  if (dismissed_picture_ids_.erase(picture_buffer_id))
-    return;
-
-  free_picture_ids_.push(picture_buffer_id);
-
-  DoIOTask();
-}
-
-void AndroidVideoDecodeAccelerator::Flush() {
-  DCHECK(thread_checker_.CalledOnValidThread());
-
-  Decode(media::BitstreamBuffer(-1, base::SharedMemoryHandle(), 0));
-}
-
-bool AndroidVideoDecodeAccelerator::ConfigureMediaCodec() {
-  DCHECK(thread_checker_.CalledOnValidThread());
-  DCHECK(surface_texture_.get());
-
-  gfx::ScopedJavaSurface surface(surface_texture_.get());
-
-  // Pass a dummy 320x240 canvas size and let the codec signal the real size
-  // when it's known from the bitstream.
-  media_codec_.reset(media::VideoCodecBridge::CreateDecoder(
-      codec_, false, gfx::Size(320, 240), surface.j_surface().obj(), NULL));
-  if (!media_codec_)
-    return false;
-
-  io_timer_.Start(FROM_HERE,
-                  DecodePollDelay(),
-                  this,
-                  &AndroidVideoDecodeAccelerator::DoIOTask);
-  return true;
-}
-
-void AndroidVideoDecodeAccelerator::Reset() {
-  DCHECK(thread_checker_.CalledOnValidThread());
-
-  while (!pending_bitstream_buffers_.empty()) {
-    int32 bitstream_buffer_id = pending_bitstream_buffers_.front().first.id();
-    pending_bitstream_buffers_.pop();
-
-    if (bitstream_buffer_id != -1) {
-      base::MessageLoop::current()->PostTask(
-          FROM_HERE,
-          base::Bind(&AndroidVideoDecodeAccelerator::NotifyEndOfBitstreamBuffer,
-                     weak_this_factory_.GetWeakPtr(),
-                     bitstream_buffer_id));
-    }
-  }
-  bitstreams_notified_in_advance_.clear();
-
-  for (OutputBufferMap::iterator it = output_picture_buffers_.begin();
-       it != output_picture_buffers_.end();
-       ++it) {
-    client_->DismissPictureBuffer(it->first);
-    dismissed_picture_ids_.insert(it->first);
-  }
-  output_picture_buffers_.clear();
-  std::queue<int32> empty;
-  std::swap(free_picture_ids_, empty);
-  CHECK(free_picture_ids_.empty());
-  picturebuffers_requested_ = false;
-
-  // On some devices, and up to at least JB-MR1,
-  // - flush() can fail after EOS (b/8125974); and
-  // - mid-stream resolution change is unsupported (b/7093648).
-  // To cope with these facts, we always stop & restart the codec on Reset().
-  io_timer_.Stop();
-  media_codec_->Stop();
-  ConfigureMediaCodec();
-  state_ = NO_ERROR;
-
-  base::MessageLoop::current()->PostTask(
-      FROM_HERE,
-      base::Bind(&AndroidVideoDecodeAccelerator::NotifyResetDone,
-                 weak_this_factory_.GetWeakPtr()));
+  DCHECK(ThreadChecker().CalledOnValidThread());
 }
 
 void AndroidVideoDecodeAccelerator::Destroy() {
-  DCHECK(thread_checker_.CalledOnValidThread());
-
-  weak_this_factory_.InvalidateWeakPtrs();
-  if (media_codec_) {
-    io_timer_.Stop();
-    media_codec_->Stop();
-  }
-  if (surface_texture_id_)
-    glDeleteTextures(1, &surface_texture_id_);
-  if (copier_)
-    copier_->Destroy();
-  delete this;
+    if (copier_)
+        copier_->Destroy();
+    AndroidVideoDecodeAcceleratorBase::Destroy();
 }
 
-bool AndroidVideoDecodeAccelerator::CanDecodeOnIOThread() {
-  return false;
+uint32 AndroidVideoDecodeAccelerator::GetNumPictureBuffers() const {
+    return kNumPictureBuffers;
 }
 
-void AndroidVideoDecodeAccelerator::RequestPictureBuffers() {
-  client_->ProvidePictureBuffers(kNumPictureBuffers, size_, GL_TEXTURE_2D);
+uint32 AndroidVideoDecodeAccelerator::GetTextureTarget() const {
+    return GL_TEXTURE_2D;
 }
 
-void AndroidVideoDecodeAccelerator::NotifyPictureReady(
-    const media::Picture& picture) {
-  client_->PictureReady(picture);
-}
+void AndroidVideoDecodeAccelerator::AssignCurrentSurfaceToPictureBuffer(
+    int32 codec_buf_index, const media::PictureBuffer& picture_buffer) {
 
-void AndroidVideoDecodeAccelerator::NotifyEndOfBitstreamBuffer(
-    int input_buffer_id) {
-  client_->NotifyEndOfBitstreamBuffer(input_buffer_id);
-}
+    // Make sure that the decoder is available.
+    RETURN_ON_FAILURE(GetGlDecoder(),
+                      "Failed to get gles2 decoder instance.",
+                      ILLEGAL_STATE);
 
-void AndroidVideoDecodeAccelerator::NotifyFlushDone() {
-  client_->NotifyFlushDone();
-}
+    // Render the codec buffer into |surface_texture_|, and switch it to be
+    // the front buffer.
+    // This ignores the emitted ByteBuffer and instead relies on rendering to
+    // the codec's SurfaceTexture and then copying from that texture to the
+    // client's PictureBuffer's texture.  This means that each picture's data
+    // is written three times: once to the ByteBuffer, once to the
+    // SurfaceTexture, and once to the client's texture.  It would be nicer to
+    // either:
+    // 1) Render directly to the client's texture from MediaCodec (one write);
+    //    or
+    // 2) Upload the ByteBuffer to the client's texture (two writes).
+    // Unfortunately neither is possible:
+    // 1) MediaCodec's use of SurfaceTexture is a singleton, and the texture
+    //    written to can't change during the codec's lifetime.  b/11990461
+    // 2) The ByteBuffer is likely to contain the pixels in a vendor-specific,
+    //    opaque/non-standard format.  It's not possible to negotiate the
+    //    decoder to emit a specific colorspace, even using HW CSC.  b/10706245
+    // So, we live with these two extra copies per picture :(
+    GetMediaCodec()->ReleaseOutputBuffer(codec_buf_index, true);
+    GetSurfaceTexture()->UpdateTexImage();
 
-void AndroidVideoDecodeAccelerator::NotifyResetDone() {
-  client_->NotifyResetDone();
-}
+    float transfrom_matrix[16];
+    GetSurfaceTexture()->GetTransformMatrix(transfrom_matrix);
 
-void AndroidVideoDecodeAccelerator::NotifyError(
-    media::VideoDecodeAccelerator::Error error) {
-  client_->NotifyError(error);
-}
+    uint32 picture_buffer_texture_id = picture_buffer.texture_id();
 
-// static
-media::VideoDecodeAccelerator::SupportedProfiles
-AndroidVideoDecodeAccelerator::GetSupportedProfiles() {
-  SupportedProfiles profiles;
+    // Defer initializing the CopyTextureCHROMIUMResourceManager until it is
+    // needed because it takes 10s of milliseconds to initialize.
+    if (!copier_) {
+        copier_.reset(new gpu::CopyTextureCHROMIUMResourceManager());
+        copier_->Initialize(GetGlDecoder());
+    }
 
-  if (!media::VideoCodecBridge::IsKnownUnaccelerated(
-          media::kCodecVP8, media::MEDIA_CODEC_DECODER)) {
-    SupportedProfile profile;
-    profile.profile = media::VP8PROFILE_ANY;
-    profile.min_resolution.SetSize(0, 0);
-    profile.max_resolution.SetSize(1920, 1088);
-    profiles.push_back(profile);
-  }
-
-#if defined(ENABLE_MEDIA_PIPELINE_ON_ANDROID)
-  if (!media::VideoCodecBridge::IsKnownUnaccelerated(
-          media::kCodecVP9, media::MEDIA_CODEC_DECODER)) {
-    SupportedProfile profile;
-    profile.profile = media::VP9PROFILE_ANY;
-    profile.min_resolution.SetSize(0, 0);
-    profile.max_resolution.SetSize(1920, 1088);
-    profiles.push_back(profile);
-  }
-
-  for (const auto& supported_profile : kSupportedH264Profiles) {
-    SupportedProfile profile;
-    profile.profile = supported_profile;
-    profile.min_resolution.SetSize(0, 0);
-    // Advertise support for 4k and let the MediaCodec fail when decoding if it
-    // doesn't support the resolution. It's assumed that consumers won't have
-    // software fallback for H264 on Android anyway.
-    profile.max_resolution.SetSize(3840, 2160);
-    profiles.push_back(profile);
-  }
-#endif
-
-  return profiles;
+    // Here, we copy |surface_texture_id_| to the picture buffer instead of
+    // setting new texture to |surface_texture_| by calling attachToGLContext()
+    // because:
+    // 1. Once we call detachFrameGLContext(), it deletes the texture previous
+    //    attached.
+    // 2. SurfaceTexture requires us to apply a transform matrix when we show
+    //    the texture.
+    // TODO(hkuang): get the StreamTexture transform matrix in GPU process
+    // instead of using default matrix crbug.com/226218.
+    const static GLfloat default_matrix[16] = {1.0f, 0.0f, 0.0f, 0.0f,
+        0.0f, 1.0f, 0.0f, 0.0f,
+        0.0f, 0.0f, 1.0f, 0.0f,
+        0.0f, 0.0f, 0.0f, 1.0f};
+    copier_->DoCopyTextureWithTransform(GetGlDecoder(),
+            GL_TEXTURE_EXTERNAL_OES,
+            GetSurfaceTextureId(),
+            picture_buffer_texture_id,
+            GetSize().width(),
+            GetSize().height(),
+            false,
+            false,
+            false,
+            default_matrix);
 }
 
 }  // namespace content