src/content/renderer/media/renderer_gpu_video_accelerator_factories.cc

   1 // Copyright 2013 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "content/renderer/media/renderer_gpu_video_accelerator_factories.h"
   6
   7 #include <GLES2/gl2.h>
   8 #include <GLES2/gl2ext.h>
   9
  10 #include "base/bind.h"
  11 #include "content/child/child_thread.h"
  12 #include "content/common/gpu/client/context_provider_command_buffer.h"
  13 #include "content/common/gpu/client/gpu_channel_host.h"
  14 #include "content/common/gpu/client/webgraphicscontext3d_command_buffer_impl.h"
  15 #include "content/renderer/render_thread_impl.h"
  16 #include "gpu/command_buffer/client/gles2_implementation.h"
  17 #include "media/video/video_decode_accelerator.h"
  18 #include "media/video/video_encode_accelerator.h"
  19 #include "third_party/skia/include/core/SkBitmap.h"
  20 #include "third_party/skia/include/core/SkPixelRef.h"
  21
  22 namespace content {
  23
  24 // static
  25 scoped_refptr<RendererGpuVideoAcceleratorFactories>
  26 RendererGpuVideoAcceleratorFactories::Create(
  27     GpuChannelHost* gpu_channel_host,
  28     const scoped_refptr<base::MessageLoopProxy>& message_loop_proxy,
  29     const scoped_refptr<ContextProviderCommandBuffer>& context_provider) {
  30   scoped_refptr<RendererGpuVideoAcceleratorFactories> factories =
  31       new RendererGpuVideoAcceleratorFactories(
  32           gpu_channel_host, message_loop_proxy, context_provider);
  33   // Post task from outside constructor, since AddRef()/Release() is unsafe from
  34   // within.
  35   message_loop_proxy->PostTask(
  36       FROM_HERE,
  37       base::Bind(&RendererGpuVideoAcceleratorFactories::BindContext,
  38                  factories));
  39   return factories;
  40 }
  41
  42 RendererGpuVideoAcceleratorFactories::RendererGpuVideoAcceleratorFactories(
  43     GpuChannelHost* gpu_channel_host,
  44     const scoped_refptr<base::MessageLoopProxy>& message_loop_proxy,
  45     const scoped_refptr<ContextProviderCommandBuffer>& context_provider)
  46     : task_runner_(message_loop_proxy),
  47       gpu_channel_host_(gpu_channel_host),
  48       context_provider_(context_provider),
  49       thread_safe_sender_(ChildThread::current()->thread_safe_sender()) {}
  50
  51 RendererGpuVideoAcceleratorFactories::~RendererGpuVideoAcceleratorFactories() {}
  52
  53 void RendererGpuVideoAcceleratorFactories::BindContext() {
  54   DCHECK(task_runner_->BelongsToCurrentThread());
  55   if (!context_provider_->BindToCurrentThread())
  56     context_provider_ = NULL;
  57 }
  58
  59 WebGraphicsContext3DCommandBufferImpl*
  60 RendererGpuVideoAcceleratorFactories::GetContext3d() {
  61   DCHECK(task_runner_->BelongsToCurrentThread());
  62   if (!context_provider_)
  63     return NULL;
  64   if (context_provider_->IsContextLost()) {
  65     context_provider_->VerifyContexts();
  66     context_provider_ = NULL;
  67     return NULL;
  68   }
  69   return context_provider_->WebContext3D();
  70 }
  71
  72 scoped_ptr<media::VideoDecodeAccelerator>
  73 RendererGpuVideoAcceleratorFactories::CreateVideoDecodeAccelerator() {
  74   DCHECK(task_runner_->BelongsToCurrentThread());
  75
  76   WebGraphicsContext3DCommandBufferImpl* context = GetContext3d();
  77   if (context && context->GetCommandBufferProxy()) {
  78     return gpu_channel_host_->CreateVideoDecoder(
  79         context->GetCommandBufferProxy()->GetRouteID());
  80   }
  81
  82   return scoped_ptr<media::VideoDecodeAccelerator>();
  83 }
  84
  85 scoped_ptr<media::VideoEncodeAccelerator>
  86 RendererGpuVideoAcceleratorFactories::CreateVideoEncodeAccelerator() {
  87   DCHECK(task_runner_->BelongsToCurrentThread());
  88
  89   WebGraphicsContext3DCommandBufferImpl* context = GetContext3d();
  90   if (context && context->GetCommandBufferProxy()) {
  91     return gpu_channel_host_->CreateVideoEncoder(
  92         context->GetCommandBufferProxy()->GetRouteID());
  93   }
  94
  95   return scoped_ptr<media::VideoEncodeAccelerator>();
  96 }
  97
  98 bool RendererGpuVideoAcceleratorFactories::CreateTextures(
  99     int32 count,
 100     const gfx::Size& size,
 101     std::vector<uint32>* texture_ids,
 102     std::vector<gpu::Mailbox>* texture_mailboxes,
 103     uint32 texture_target) {
 104   DCHECK(task_runner_->BelongsToCurrentThread());
 105   DCHECK(texture_target);
 106
 107   WebGraphicsContext3DCommandBufferImpl* context = GetContext3d();
 108   if (!context)
 109     return false;
 110
 111   gpu::gles2::GLES2Implementation* gles2 = context->GetImplementation();
 112   texture_ids->resize(count);
 113   texture_mailboxes->resize(count);
 114   gles2->GenTextures(count, &texture_ids->at(0));
 115   for (int i = 0; i < count; ++i) {
 116     gles2->ActiveTexture(GL_TEXTURE0);
 117     uint32 texture_id = texture_ids->at(i);
 118     gles2->BindTexture(texture_target, texture_id);
 119     gles2->TexParameteri(texture_target, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
 120     gles2->TexParameteri(texture_target, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
 121     gles2->TexParameteri(texture_target, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
 122     gles2->TexParameteri(texture_target, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
 123     if (texture_target == GL_TEXTURE_2D) {
 124       gles2->TexImage2D(texture_target,
 125                         0,
 126                         GL_RGBA,
 127                         size.width(),
 128                         size.height(),
 129                         0,
 130                         GL_RGBA,
 131                         GL_UNSIGNED_BYTE,
 132                         NULL);
 133     }
 134     gles2->GenMailboxCHROMIUM(texture_mailboxes->at(i).name);
 135     gles2->ProduceTextureCHROMIUM(texture_target,
 136                                   texture_mailboxes->at(i).name);
 137   }
 138
 139   // We need ShallowFlushCHROMIUM() here to order the command buffer commands
 140   // with respect to IPC to the GPU process, to guarantee that the decoder in
 141   // the GPU process can use these textures as soon as it receives IPC
 142   // notification of them.
 143   gles2->ShallowFlushCHROMIUM();
 144   DCHECK_EQ(gles2->GetError(), static_cast<GLenum>(GL_NO_ERROR));
 145   return true;
 146 }
 147
 148 void RendererGpuVideoAcceleratorFactories::DeleteTexture(uint32 texture_id) {
 149   DCHECK(task_runner_->BelongsToCurrentThread());
 150
 151   WebGraphicsContext3DCommandBufferImpl* context = GetContext3d();
 152   if (!context)
 153     return;
 154
 155   gpu::gles2::GLES2Implementation* gles2 = context->GetImplementation();
 156   gles2->DeleteTextures(1, &texture_id);
 157   DCHECK_EQ(gles2->GetError(), static_cast<GLenum>(GL_NO_ERROR));
 158 }
 159
 160 void RendererGpuVideoAcceleratorFactories::WaitSyncPoint(uint32 sync_point) {
 161   DCHECK(task_runner_->BelongsToCurrentThread());
 162
 163   WebGraphicsContext3DCommandBufferImpl* context = GetContext3d();
 164   if (!context)
 165     return;
 166
 167   gpu::gles2::GLES2Implementation* gles2 = context->GetImplementation();
 168   gles2->WaitSyncPointCHROMIUM(sync_point);
 169
 170   // Callers expect the WaitSyncPoint to affect the next IPCs. Make sure to
 171   // flush the command buffers to ensure that.
 172   gles2->ShallowFlushCHROMIUM();
 173 }
 174
 175 void RendererGpuVideoAcceleratorFactories::ReadPixels(
 176     uint32 texture_id,
 177     const gfx::Rect& visible_rect,
 178     const SkBitmap& pixels) {
 179   DCHECK(task_runner_->BelongsToCurrentThread());
 180
 181   WebGraphicsContext3DCommandBufferImpl* context = GetContext3d();
 182   if (!context)
 183     return;
 184
 185   gpu::gles2::GLES2Implementation* gles2 = context->GetImplementation();
 186
 187   GLuint tmp_texture;
 188   gles2->GenTextures(1, &tmp_texture);
 189   gles2->BindTexture(GL_TEXTURE_2D, tmp_texture);
 190   gles2->TexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
 191   gles2->TexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
 192   gles2->TexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
 193   gles2->TexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
 194   context->copyTextureCHROMIUM(
 195       GL_TEXTURE_2D, texture_id, tmp_texture, 0, GL_RGBA, GL_UNSIGNED_BYTE);
 196
 197   GLuint fb;
 198   gles2->GenFramebuffers(1, &fb);
 199   gles2->BindFramebuffer(GL_FRAMEBUFFER, fb);
 200   gles2->FramebufferTexture2D(
 201       GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, tmp_texture, 0);
 202   gles2->PixelStorei(GL_PACK_ALIGNMENT, 4);
 203 #if SK_B32_SHIFT == 0 && SK_G32_SHIFT == 8 && SK_R32_SHIFT == 16 && \
 204     SK_A32_SHIFT == 24
 205   GLenum skia_format = GL_BGRA_EXT;
 206 #elif SK_R32_SHIFT == 0 && SK_G32_SHIFT == 8 && SK_B32_SHIFT == 16 && \
 207     SK_A32_SHIFT == 24
 208   GLenum skia_format = GL_RGBA;
 209 #else
 210 #error Unexpected Skia ARGB_8888 layout!
 211 #endif
 212   gles2->ReadPixels(visible_rect.x(),
 213                     visible_rect.y(),
 214                     visible_rect.width(),
 215                     visible_rect.height(),
 216                     skia_format,
 217                     GL_UNSIGNED_BYTE,
 218                     pixels.pixelRef()->pixels());
 219   gles2->DeleteFramebuffers(1, &fb);
 220   gles2->DeleteTextures(1, &tmp_texture);
 221   DCHECK_EQ(gles2->GetError(), static_cast<GLenum>(GL_NO_ERROR));
 222 }
 223
 224 base::SharedMemory* RendererGpuVideoAcceleratorFactories::CreateSharedMemory(
 225     size_t size) {
 226   DCHECK(task_runner_->BelongsToCurrentThread());
 227   return ChildThread::AllocateSharedMemory(size, thread_safe_sender_.get());
 228 }
 229
 230 scoped_refptr<base::SingleThreadTaskRunner>
 231 RendererGpuVideoAcceleratorFactories::GetTaskRunner() {
 232   return task_runner_;
 233 }
 234
 235 }  // namespace content