Add media::VideoEncodeAccelerator with WebRTC integration

content/renderer/media/renderer_gpu_video_accelerator_factories.cc

 // Copyright (c) 2012 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/renderer/media/renderer_gpu_video_decoder_factories.h"
+#include "content/renderer/media/renderer_gpu_video_accelerator_factories.h"
 
 #include <GLES2/gl2.h>
 #include <GLES2/gl2ext.h>
 
 #include "base/bind.h"
 #include "content/child/child_thread.h"
 #include "content/common/gpu/client/gpu_channel_host.h"
 #include "content/common/gpu/client/webgraphicscontext3d_command_buffer_impl.h"
 #include "gpu/command_buffer/client/gles2_implementation.h"
 #include "gpu/ipc/command_buffer_proxy.h"
 #include "third_party/skia/include/core/SkPixelRef.h"
 
 namespace content {
 
-RendererGpuVideoDecoderFactories::~RendererGpuVideoDecoderFactories() {}
-RendererGpuVideoDecoderFactories::RendererGpuVideoDecoderFactories(
+RendererGpuVideoAcceleratorFactories::~RendererGpuVideoAcceleratorFactories() {}
+RendererGpuVideoAcceleratorFactories::RendererGpuVideoAcceleratorFactories(
     GpuChannelHost* gpu_channel_host,
     const scoped_refptr<base::MessageLoopProxy>& message_loop,
     WebGraphicsContext3DCommandBufferImpl* context)
     : message_loop_(message_loop),
       main_message_loop_(base::MessageLoopProxy::current()),
       gpu_channel_host_(gpu_channel_host),
       aborted_waiter_(true, false),
       message_loop_async_waiter_(false, false),
       render_thread_async_waiter_(false, false) {
-  if (message_loop_->BelongsToCurrentThread()) {
-    AsyncGetContext(context);
-    message_loop_async_waiter_.Reset();
-    return;
+  if (context) {

[Ami GONE FROM CHROMIUM, 2013/07/31 23:01:12]

how can this fail?
if it's necessary, please reverse the test and early-return to de-indent the
rest of the function.

[sheu, 2013/08/02 01:27:49]

If we disable HW-accelerated decode, we won't get a valid context.  But we would
still like to support HW-accelerated encode.

Test reversed.

+    if (message_loop_->BelongsToCurrentThread()) {
+      AsyncGetContext(context);
+      message_loop_async_waiter_.Reset();
+      return;
+    }
+    // Wait for the context to be acquired.
+    message_loop_->PostTask(
+        FROM_HERE,
+        base::Bind(&RendererGpuVideoAcceleratorFactories::AsyncGetContext,
+                   // Unretained to avoid ref/deref'ing |*this|, which is not
+                   // yet stored in a scoped_refptr.  Safe because the Wait()
+                   // below keeps us alive until this task completes.
+                   base::Unretained(this),
+                   // OK to pass raw because the pointee is only deleted on the
+                   // compositor thread, and only as the result of a PostTask
+                   // from the render thread which can only happen after this
+                   // function returns, so our PostTask will run first.
+                   context));
+    message_loop_async_waiter_.Wait();
   }
-  // Wait for the context to be acquired.
-  message_loop_->PostTask(FROM_HERE, base::Bind(
-      &RendererGpuVideoDecoderFactories::AsyncGetContext,
-      // Unretained to avoid ref/deref'ing |*this|, which is not yet stored in a
-      // scoped_refptr.  Safe because the Wait() below keeps us alive until this
-      // task completes.
-      base::Unretained(this),
-      // OK to pass raw because the pointee is only deleted on the compositor
-      // thread, and only as the result of a PostTask from the render thread
-      // which can only happen after this function returns, so our PostTask will
-      // run first.
-      context));
-  message_loop_async_waiter_.Wait();
 }
 
-RendererGpuVideoDecoderFactories::RendererGpuVideoDecoderFactories()
+RendererGpuVideoAcceleratorFactories::RendererGpuVideoAcceleratorFactories()
     : aborted_waiter_(true, false),
       message_loop_async_waiter_(false, false),
       render_thread_async_waiter_(false, false) {}
 
-void RendererGpuVideoDecoderFactories::AsyncGetContext(
+void RendererGpuVideoAcceleratorFactories::AsyncGetContext(
     WebGraphicsContext3DCommandBufferImpl* context) {
   context_ = context->AsWeakPtr();
   if (context_.get()) {
     if (context_->makeContextCurrent()) {
       // Called once per media player, but is a no-op after the first one in
       // each renderer.
       context_->insertEventMarkerEXT("GpuVDAContext3D");
     }
   }
   message_loop_async_waiter_.Signal();
 }
 
-media::VideoDecodeAccelerator*
-RendererGpuVideoDecoderFactories::CreateVideoDecodeAccelerator(
+scoped_ptr<media::VideoDecodeAccelerator>
+RendererGpuVideoAcceleratorFactories::CreateVideoDecodeAccelerator(
     media::VideoCodecProfile profile,
     media::VideoDecodeAccelerator::Client* client) {
   if (message_loop_->BelongsToCurrentThread()) {
     AsyncCreateVideoDecodeAccelerator(profile, client);
     message_loop_async_waiter_.Reset();
-    return vda_.release();
+    return vda_.Pass();
   }
   // The VDA is returned in the vda_ member variable by the
   // AsyncCreateVideoDecodeAccelerator() function.
-  message_loop_->PostTask(FROM_HERE, base::Bind(
-      &RendererGpuVideoDecoderFactories::AsyncCreateVideoDecodeAccelerator,
-      this, profile, client));
+  message_loop_->PostTask(FROM_HERE,
+                          base::Bind(&RendererGpuVideoAcceleratorFactories::
+                                         AsyncCreateVideoDecodeAccelerator,

[Ami GONE FROM CHROMIUM, 2013/07/31 23:01:12]

Ugh, is this what clang-format makes??  If yes, IMO worth a go/clang-format-bug

[sheu, 2013/08/02 01:27:49]

It's just because the scoped function name is so long.  The formatting _does_
sort of make sense, for a computer with no innate sense of aesthetics.

[Ami GONE FROM CHROMIUM, 2013/08/02 18:42:40]

I disagree, possibly because I believe the clang-format folks can deliver
miracles.  Filed b/10147819.

+                                     this,
+                                     profile,
+                                     client));
 
   base::WaitableEvent* objects[] = {&aborted_waiter_,
                                     &message_loop_async_waiter_};
   if (base::WaitableEvent::WaitMany(objects, arraysize(objects)) == 0) {
     // If we are aborting and the VDA is created by the
     // AsyncCreateVideoDecodeAccelerator() function later we need to ensure
     // that it is destroyed on the same thread.
-    message_loop_->PostTask(FROM_HERE, base::Bind(
-        &RendererGpuVideoDecoderFactories::AsyncDestroyVideoDecodeAccelerator,
-        this));
-    return NULL;
+    message_loop_->PostTask(FROM_HERE,
+                            base::Bind(&RendererGpuVideoAcceleratorFactories::
+                                           AsyncDestroyVideoDecodeAccelerator,
+                                       this));
+    return scoped_ptr<media::VideoDecodeAccelerator>();
   }
-  return vda_.release();
+  return vda_.Pass();
 }
 
-void RendererGpuVideoDecoderFactories::AsyncCreateVideoDecodeAccelerator(
-      media::VideoCodecProfile profile,
-      media::VideoDecodeAccelerator::Client* client) {
+scoped_ptr<media::VideoEncodeAccelerator>
+RendererGpuVideoAcceleratorFactories::CreateVideoEncodeAccelerator(
+    media::VideoEncodeAccelerator::Client* client) {
+  if (message_loop_->BelongsToCurrentThread()) {
+    AsyncCreateVideoEncodeAccelerator(client);
+    message_loop_async_waiter_.Reset();
+    return vea_.Pass();
+  }
+  // The VEA is returned in the vea_ member variable by the
+  // AsyncCreateVideoEncodeAccelerator() function.
+  message_loop_->PostTask(FROM_HERE,
+                          base::Bind(&RendererGpuVideoAcceleratorFactories::
+                                         AsyncCreateVideoEncodeAccelerator,
+                                     this,
+                                     client));
+
+  base::WaitableEvent* objects[] = {&aborted_waiter_,
+                                    &message_loop_async_waiter_};
+  if (base::WaitableEvent::WaitMany(objects, arraysize(objects)) == 0) {
+    // If we are aborting and the VDA is created by the
+    // AsyncCreateVideoEncodeAccelerator() function later we need to ensure
+    // that it is destroyed on the same thread.
+    message_loop_->PostTask(FROM_HERE,
+                            base::Bind(&RendererGpuVideoAcceleratorFactories::
+                                           AsyncDestroyVideoEncodeAccelerator,
+                                       this));
+    return scoped_ptr<media::VideoEncodeAccelerator>();
+  }
+  return vea_.Pass();
+}
+
+void RendererGpuVideoAcceleratorFactories::AsyncCreateVideoDecodeAccelerator(
+    media::VideoCodecProfile profile,
+    media::VideoDecodeAccelerator::Client* client) {
   DCHECK(message_loop_->BelongsToCurrentThread());
 
   if (context_.get() && context_->GetCommandBufferProxy()) {
     vda_ = gpu_channel_host_->CreateVideoDecoder(
         context_->GetCommandBufferProxy()->GetRouteID(), profile, client);
   }
   message_loop_async_waiter_.Signal();
 }
 
-uint32 RendererGpuVideoDecoderFactories::CreateTextures(
-    int32 count, const gfx::Size& size,
+void RendererGpuVideoAcceleratorFactories::AsyncCreateVideoEncodeAccelerator(
+    media::VideoEncodeAccelerator::Client* client) {
+  DCHECK(message_loop_->BelongsToCurrentThread());
+
+  vea_ = gpu_channel_host_->CreateVideoEncoder(client).Pass();
+  message_loop_async_waiter_.Signal();
+}
+
+uint32 RendererGpuVideoAcceleratorFactories::CreateTextures(
+    int32 count,
+    const gfx::Size& size,
     std::vector<uint32>* texture_ids,
     std::vector<gpu::Mailbox>* texture_mailboxes,
     uint32 texture_target) {
   uint32 sync_point = 0;
 
   if (message_loop_->BelongsToCurrentThread()) {
     AsyncCreateTextures(count, size, texture_target, &sync_point);
     texture_ids->swap(created_textures_);
     texture_mailboxes->swap(created_texture_mailboxes_);
     message_loop_async_waiter_.Reset();
     return sync_point;
   }
-  message_loop_->PostTask(FROM_HERE, base::Bind(
-      &RendererGpuVideoDecoderFactories::AsyncCreateTextures, this,
-      count, size, texture_target, &sync_point));
+  message_loop_->PostTask(
+      FROM_HERE,
+      base::Bind(&RendererGpuVideoAcceleratorFactories::AsyncCreateTextures,
+                 this,
+                 count,
+                 size,
+                 texture_target,
+                 &sync_point));
 
   base::WaitableEvent* objects[] = {&aborted_waiter_,
                                     &message_loop_async_waiter_};
   if (base::WaitableEvent::WaitMany(objects, arraysize(objects)) == 0)
     return 0;
   texture_ids->swap(created_textures_);
   texture_mailboxes->swap(created_texture_mailboxes_);
   return sync_point;
 }
 
-void RendererGpuVideoDecoderFactories::AsyncCreateTextures(
-    int32 count, const gfx::Size& size, uint32 texture_target,
+void RendererGpuVideoAcceleratorFactories::AsyncCreateTextures(
+    int32 count,
+    const gfx::Size& size,
+    uint32 texture_target,
     uint32* sync_point) {
   DCHECK(message_loop_->BelongsToCurrentThread());
   DCHECK(texture_target);
 
   if (!context_.get()) {
     message_loop_async_waiter_.Signal();
     return;
   }
   gpu::gles2::GLES2Implementation* gles2 = context_->GetImplementation();
   created_textures_.resize(count);
   created_texture_mailboxes_.resize(count);
   gles2->GenTextures(count, &created_textures_[0]);
   for (int i = 0; i < count; ++i) {
     gles2->ActiveTexture(GL_TEXTURE0);
     uint32 texture_id = created_textures_[i];
     gles2->BindTexture(texture_target, texture_id);
     gles2->TexParameteri(texture_target, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
     gles2->TexParameteri(texture_target, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
     gles2->TexParameteri(texture_target, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
     gles2->TexParameteri(texture_target, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
     if (texture_target == GL_TEXTURE_2D) {
-      gles2->TexImage2D(texture_target, 0, GL_RGBA, size.width(), size.height(),
-                        0, GL_RGBA, GL_UNSIGNED_BYTE, NULL);
+      gles2->TexImage2D(texture_target,
+                        0,
+                        GL_RGBA,
+                        size.width(),
+                        size.height(),
+                        0,
+                        GL_RGBA,
+                        GL_UNSIGNED_BYTE,
+                        NULL);
     }
     gles2->GenMailboxCHROMIUM(created_texture_mailboxes_[i].name);
     gles2->ProduceTextureCHROMIUM(texture_target,
                                   created_texture_mailboxes_[i].name);
   }
 
   // We need a glFlush here to guarantee the decoder (in the GPU process) can
   // use the texture ids we return here.  Since textures are expected to be
   // reused, this should not be unacceptably expensive.
   gles2->Flush();
   DCHECK_EQ(gles2->GetError(), static_cast<GLenum>(GL_NO_ERROR));
 
   *sync_point = gles2->InsertSyncPointCHROMIUM();
   message_loop_async_waiter_.Signal();
 }
 
-void RendererGpuVideoDecoderFactories::DeleteTexture(uint32 texture_id) {
+void RendererGpuVideoAcceleratorFactories::DeleteTexture(uint32 texture_id) {
   if (message_loop_->BelongsToCurrentThread()) {
     AsyncDeleteTexture(texture_id);
     return;
   }
-  message_loop_->PostTask(FROM_HERE, base::Bind(
-      &RendererGpuVideoDecoderFactories::AsyncDeleteTexture, this, texture_id));
+  message_loop_->PostTask(
+      FROM_HERE,
+      base::Bind(&RendererGpuVideoAcceleratorFactories::AsyncDeleteTexture,
+                 this,
+                 texture_id));
 }
 
-void RendererGpuVideoDecoderFactories::AsyncDeleteTexture(uint32 texture_id) {
+void RendererGpuVideoAcceleratorFactories::AsyncDeleteTexture(
+    uint32 texture_id) {
   DCHECK(message_loop_->BelongsToCurrentThread());
   if (!context_.get())
     return;
 
   gpu::gles2::GLES2Implementation* gles2 = context_->GetImplementation();
   gles2->DeleteTextures(1, &texture_id);
   DCHECK_EQ(gles2->GetError(), static_cast<GLenum>(GL_NO_ERROR));
 }
 
-void RendererGpuVideoDecoderFactories::WaitSyncPoint(uint32 sync_point) {
+void RendererGpuVideoAcceleratorFactories::WaitSyncPoint(uint32 sync_point) {
   if (message_loop_->BelongsToCurrentThread()) {
     AsyncWaitSyncPoint(sync_point);
     message_loop_async_waiter_.Reset();
     return;
   }
 
-  message_loop_->PostTask(FROM_HERE, base::Bind(
-      &RendererGpuVideoDecoderFactories::AsyncWaitSyncPoint,
-      this,
-      sync_point));
+  message_loop_->PostTask(
+      FROM_HERE,
+      base::Bind(&RendererGpuVideoAcceleratorFactories::AsyncWaitSyncPoint,
+                 this,
+                 sync_point));
   base::WaitableEvent* objects[] = {&aborted_waiter_,
                                     &message_loop_async_waiter_};
   base::WaitableEvent::WaitMany(objects, arraysize(objects));
 }
 
-void RendererGpuVideoDecoderFactories::AsyncWaitSyncPoint(uint32 sync_point) {
+void RendererGpuVideoAcceleratorFactories::AsyncWaitSyncPoint(
+    uint32 sync_point) {
   DCHECK(message_loop_->BelongsToCurrentThread());
   if (!context_) {
     message_loop_async_waiter_.Signal();
     return;
   }
 
   gpu::gles2::GLES2Implementation* gles2 = context_->GetImplementation();
   gles2->WaitSyncPointCHROMIUM(sync_point);
   message_loop_async_waiter_.Signal();
 }
 
-void RendererGpuVideoDecoderFactories::ReadPixels(
-    uint32 texture_id, uint32 texture_target, const gfx::Size& size,
-    const SkBitmap& pixels) {
+void RendererGpuVideoAcceleratorFactories::ReadPixels(uint32 texture_id,
+                                                      uint32 texture_target,
+                                                      const gfx::Size& size,
+                                                      const SkBitmap& pixels) {
   // SkBitmaps use the SkPixelRef object to refcount the underlying pixels.
   // Multiple SkBitmaps can share a SkPixelRef instance. We use this to
   // ensure that the underlying pixels in the SkBitmap passed in remain valid
   // until the AsyncReadPixels() call completes.
   read_pixels_bitmap_.setPixelRef(pixels.pixelRef());
 
   if (!message_loop_->BelongsToCurrentThread()) {
-    message_loop_->PostTask(FROM_HERE, base::Bind(
-        &RendererGpuVideoDecoderFactories::AsyncReadPixels, this,
-        texture_id, texture_target, size));
+    message_loop_->PostTask(
+        FROM_HERE,
+        base::Bind(&RendererGpuVideoAcceleratorFactories::AsyncReadPixels,
+                   this,
+                   texture_id,
+                   texture_target,
+                   size));
     base::WaitableEvent* objects[] = {&aborted_waiter_,
                                       &message_loop_async_waiter_};
     if (base::WaitableEvent::WaitMany(objects, arraysize(objects)) == 0)
       return;
   } else {
     AsyncReadPixels(texture_id, texture_target, size);
     message_loop_async_waiter_.Reset();
   }
   read_pixels_bitmap_.setPixelRef(NULL);
 }
 
-void RendererGpuVideoDecoderFactories::AsyncReadPixels(
-    uint32 texture_id, uint32 texture_target, const gfx::Size& size) {
+void RendererGpuVideoAcceleratorFactories::AsyncReadPixels(
+    uint32 texture_id,
+    uint32 texture_target,
+    const gfx::Size& size) {
   DCHECK(message_loop_->BelongsToCurrentThread());
   if (!context_.get()) {
     message_loop_async_waiter_.Signal();
     return;
   }
 
   gpu::gles2::GLES2Implementation* gles2 = context_->GetImplementation();
 
   GLuint tmp_texture;
   gles2->GenTextures(1, &tmp_texture);
   gles2->BindTexture(texture_target, tmp_texture);
   gles2->TexParameteri(texture_target, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
   gles2->TexParameteri(texture_target, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
   gles2->TexParameteri(texture_target, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
   gles2->TexParameteri(texture_target, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
   context_->copyTextureCHROMIUM(
       texture_target, texture_id, tmp_texture, 0, GL_RGBA, GL_UNSIGNED_BYTE);
 
   GLuint fb;
   gles2->GenFramebuffers(1, &fb);
   gles2->BindFramebuffer(GL_FRAMEBUFFER, fb);
-  gles2->FramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0,
-                              texture_target, tmp_texture, 0);
+  gles2->FramebufferTexture2D(
+      GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, texture_target, tmp_texture, 0);
   gles2->PixelStorei(GL_PACK_ALIGNMENT, 4);
-  gles2->ReadPixels(0, 0, size.width(), size.height(), GL_BGRA_EXT,
-      GL_UNSIGNED_BYTE, read_pixels_bitmap_.pixelRef()->pixels());
+  gles2->ReadPixels(0,
+                    0,
+                    size.width(),
+                    size.height(),
+                    GL_BGRA_EXT,
+                    GL_UNSIGNED_BYTE,
+                    read_pixels_bitmap_.pixelRef()->pixels());
   gles2->DeleteFramebuffers(1, &fb);
   gles2->DeleteTextures(1, &tmp_texture);
   DCHECK_EQ(gles2->GetError(), static_cast<GLenum>(GL_NO_ERROR));
   message_loop_async_waiter_.Signal();
 }
 
-base::SharedMemory* RendererGpuVideoDecoderFactories::CreateSharedMemory(
+base::SharedMemory* RendererGpuVideoAcceleratorFactories::CreateSharedMemory(
     size_t size) {
   if (main_message_loop_->BelongsToCurrentThread()) {
     return ChildThread::current()->AllocateSharedMemory(size);
   }
-  main_message_loop_->PostTask(FROM_HERE, base::Bind(
-      &RendererGpuVideoDecoderFactories::AsyncCreateSharedMemory, this,
-      size));
+  main_message_loop_->PostTask(
+      FROM_HERE,
+      base::Bind(&RendererGpuVideoAcceleratorFactories::AsyncCreateSharedMemory,
+                 this,
+                 size));
 
   base::WaitableEvent* objects[] = {&aborted_waiter_,
                                     &render_thread_async_waiter_};
   if (base::WaitableEvent::WaitMany(objects, arraysize(objects)) == 0)
     return NULL;
   return shared_memory_segment_.release();
 }
 
-void RendererGpuVideoDecoderFactories::AsyncCreateSharedMemory(size_t size) {
+void RendererGpuVideoAcceleratorFactories::AsyncCreateSharedMemory(
+    size_t size) {
   DCHECK_EQ(base::MessageLoop::current(),
             ChildThread::current()->message_loop());
 
   shared_memory_segment_.reset(
       ChildThread::current()->AllocateSharedMemory(size));
   render_thread_async_waiter_.Signal();
 }
 
 scoped_refptr<base::MessageLoopProxy>
-RendererGpuVideoDecoderFactories::GetMessageLoop() {
+RendererGpuVideoAcceleratorFactories::GetMessageLoop() {
   return message_loop_;
 }
 
-void RendererGpuVideoDecoderFactories::Abort() {
-  aborted_waiter_.Signal();
-}
+void RendererGpuVideoAcceleratorFactories::Abort() { aborted_waiter_.Signal(); }
 
-bool RendererGpuVideoDecoderFactories::IsAborted() {
+bool RendererGpuVideoAcceleratorFactories::IsAborted() {
   return aborted_waiter_.IsSignaled();
 }
 
-scoped_refptr<media::GpuVideoDecoderFactories>
-RendererGpuVideoDecoderFactories::Clone() {
-  scoped_refptr<RendererGpuVideoDecoderFactories> factories =
-      new RendererGpuVideoDecoderFactories();
+scoped_refptr<media::GpuVideoAcceleratorFactories>
+RendererGpuVideoAcceleratorFactories::Clone() {
+  scoped_refptr<RendererGpuVideoAcceleratorFactories> factories =
+      new RendererGpuVideoAcceleratorFactories();
   factories->message_loop_ = message_loop_;
   factories->main_message_loop_ = main_message_loop_;
   factories->gpu_channel_host_ = gpu_channel_host_;
   factories->context_ = context_;
   return factories;
 }
 
-void RendererGpuVideoDecoderFactories::AsyncDestroyVideoDecodeAccelerator() {
+void
+RendererGpuVideoAcceleratorFactories::AsyncDestroyVideoDecodeAccelerator() {
   // OK to release because Destroy() will delete the VDA instance.
   if (vda_)
     vda_.release()->Destroy();
 }
 
+void
+RendererGpuVideoAcceleratorFactories::AsyncDestroyVideoEncodeAccelerator() {
+  // OK to release because Destroy() will delete the VDA instance.
+  if (vea_)
+    vea_.release()->Destroy();
+}
+
 }  // namespace content