Migrate content/common/gpu/media code to media/gpu

content/common/gpu/media/fake_video_decode_accelerator.cc

-// Copyright 2014 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/fake_video_decode_accelerator.h"
-
-#include <stddef.h>
-#include <string.h>
-
-#include <memory>
-
-#include "base/bind.h"
-#include "base/location.h"
-#include "base/thread_task_runner_handle.h"
-#include "media/base/bitstream_buffer.h"
-#include "media/base/limits.h"
-#include "ui/gl/gl_context.h"
-#include "ui/gl/gl_implementation.h"
-#include "ui/gl/gl_surface.h"
-#include "ui/gl/gl_surface_egl.h"
-#include "ui/gl/gl_surface_glx.h"
-
-namespace content {
-
-static const uint32_t kDefaultTextureTarget = GL_TEXTURE_2D;
-// Must be at least 2 since the rendering helper will switch between textures
-// and if there is only one, it will wait for the next one that will never come.
-// Must also be an even number as otherwise there won't be the same amount of
-// white and black frames.
-static const unsigned int kNumBuffers = media::limits::kMaxVideoFrames +
-    (media::limits::kMaxVideoFrames & 1u);
-
-FakeVideoDecodeAccelerator::FakeVideoDecodeAccelerator(
-    const gfx::Size& size,
-    const MakeGLContextCurrentCallback& make_context_current_cb)
-    : child_task_runner_(base::ThreadTaskRunnerHandle::Get()),
-      client_(NULL),
-      make_context_current_cb_(make_context_current_cb),
-      frame_buffer_size_(size),
-      flushing_(false),
-      weak_this_factory_(this) {}
-
-FakeVideoDecodeAccelerator::~FakeVideoDecodeAccelerator() {
-}
-
-bool FakeVideoDecodeAccelerator::Initialize(const Config& config,
-                                            Client* client) {
-  DCHECK(child_task_runner_->BelongsToCurrentThread());
-  if (config.profile == media::VIDEO_CODEC_PROFILE_UNKNOWN) {
-    LOG(ERROR) << "unknown codec profile";
-    return false;
-  }
-  if (config.is_encrypted) {
-    NOTREACHED() << "encrypted streams are not supported";
-    return false;
-  }
-
-  // V4L2VideoDecodeAccelerator waits until first decode call to ask for buffers
-  // This class asks for it on initialization instead.
-  client_ = client;
-  client_->ProvidePictureBuffers(kNumBuffers, 1, frame_buffer_size_,
-                                 kDefaultTextureTarget);
-  return true;
-}
-
-void FakeVideoDecodeAccelerator::Decode(
-    const media::BitstreamBuffer& bitstream_buffer) {
-  // We won't really read from the bitstream_buffer, close the handle.
-  if (base::SharedMemory::IsHandleValid(bitstream_buffer.handle()))
-    base::SharedMemory::CloseHandle(bitstream_buffer.handle());
-
-  if (bitstream_buffer.id() < 0) {
-    LOG(ERROR) << "Invalid bitstream: id=" << bitstream_buffer.id();
-    client_->NotifyError(INVALID_ARGUMENT);
-    return;
-  }
-
-  int bitstream_buffer_id = bitstream_buffer.id();
-  queued_bitstream_ids_.push(bitstream_buffer_id);
-  child_task_runner_->PostTask(
-      FROM_HERE, base::Bind(&FakeVideoDecodeAccelerator::DoPictureReady,
-                            weak_this_factory_.GetWeakPtr()));
-}
-
-// Similar to UseOutputBitstreamBuffer for the encode accelerator.
-void FakeVideoDecodeAccelerator::AssignPictureBuffers(
-    const std::vector<media::PictureBuffer>& buffers) {
-  DCHECK(buffers.size() == kNumBuffers);
-  DCHECK(!(buffers.size()%2));
-
-  // Save buffers and mark all buffers as ready for use.
-  std::unique_ptr<uint8_t[]> white_data(
-      new uint8_t[frame_buffer_size_.width() * frame_buffer_size_.height() *
-                  4]);
-  memset(white_data.get(),
-         UINT8_MAX,
-         frame_buffer_size_.width() * frame_buffer_size_.height() * 4);
-  std::unique_ptr<uint8_t[]> black_data(
-      new uint8_t[frame_buffer_size_.width() * frame_buffer_size_.height() *
-                  4]);
-  memset(black_data.get(),
-         0,
-         frame_buffer_size_.width() * frame_buffer_size_.height() * 4);
-  if (!make_context_current_cb_.Run()) {
-    LOG(ERROR) << "ReusePictureBuffer(): could not make context current";
-    return;
-  }
-  for (size_t index = 0; index < buffers.size(); ++index) {
-    DCHECK_LE(1u, buffers[index].texture_ids().size());
-    glBindTexture(GL_TEXTURE_2D, buffers[index].texture_ids()[0]);
-    // Every other frame white and the rest black.
-    uint8_t* data = index % 2 ? white_data.get() : black_data.get();
-    glTexImage2D(GL_TEXTURE_2D,
-                 0,
-                 GL_RGBA,
-                 frame_buffer_size_.width(),
-                 frame_buffer_size_.height(),
-                 0,
-                 GL_RGBA,
-                 GL_UNSIGNED_BYTE,
-                 data);
-    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
-    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
-    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
-    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
-    glBindTexture(GL_TEXTURE_2D, 0);
-    free_output_buffers_.push(buffers[index].id());
-  }
-  child_task_runner_->PostTask(
-      FROM_HERE, base::Bind(&FakeVideoDecodeAccelerator::DoPictureReady,
-                            weak_this_factory_.GetWeakPtr()));
-}
-
-void FakeVideoDecodeAccelerator::ReusePictureBuffer(int32_t picture_buffer_id) {
-  free_output_buffers_.push(picture_buffer_id);
-  child_task_runner_->PostTask(
-      FROM_HERE, base::Bind(&FakeVideoDecodeAccelerator::DoPictureReady,
-                            weak_this_factory_.GetWeakPtr()));
-}
-
-void FakeVideoDecodeAccelerator::Flush() {
-  flushing_ = true;
-  child_task_runner_->PostTask(
-      FROM_HERE, base::Bind(&FakeVideoDecodeAccelerator::DoPictureReady,
-                            weak_this_factory_.GetWeakPtr()));
-}
-
-void FakeVideoDecodeAccelerator::Reset() {
-  while (!queued_bitstream_ids_.empty()) {
-    client_->NotifyEndOfBitstreamBuffer(queued_bitstream_ids_.front());
-    queued_bitstream_ids_.pop();
-  }
-  client_->NotifyResetDone();
-}
-
-void FakeVideoDecodeAccelerator::Destroy() {
-  while (!queued_bitstream_ids_.empty()) {
-    client_->NotifyEndOfBitstreamBuffer(queued_bitstream_ids_.front());
-    queued_bitstream_ids_.pop();
-  }
-  delete this;
-}
-
-bool FakeVideoDecodeAccelerator::TryToSetupDecodeOnSeparateThread(
-    const base::WeakPtr<Client>& decode_client,
-    const scoped_refptr<base::SingleThreadTaskRunner>& decode_task_runner) {
-  return false;
-}
-
-void FakeVideoDecodeAccelerator::DoPictureReady() {
-  if (flushing_ && queued_bitstream_ids_.empty()) {
-    flushing_ = false;
-    client_->NotifyFlushDone();
-  }
-  while (!free_output_buffers_.empty() && !queued_bitstream_ids_.empty()) {
-    int bitstream_id = queued_bitstream_ids_.front();
-    queued_bitstream_ids_.pop();
-    int buffer_id = free_output_buffers_.front();
-    free_output_buffers_.pop();
-
-    const media::Picture picture =
-        media::Picture(buffer_id,
-                       bitstream_id,
-                       gfx::Rect(frame_buffer_size_),
-                       false);
-    client_->PictureReady(picture);
-    // Bitstream no longer needed.
-    client_->NotifyEndOfBitstreamBuffer(bitstream_id);
-    if (flushing_ && queued_bitstream_ids_.empty()) {
-      flushing_ = false;
-      client_->NotifyFlushDone();
-    }
-  }
-}
-
-}  // namespace content