root/content/renderer/media/android/stream_texture_factory_impl.cc

DEFINITIONS

1. client_
2. Release
3. SetClient
4. BindToCurrentThread
5. OnFrameAvailable
6. OnMatrixChanged
7. Create
8. view_id_
9. CreateProxy
10. EstablishPeer
11. CreateStreamTexture
12. SetStreamTextureSize
13. ContextGL

// 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/renderer/media/android/stream_texture_factory_impl.h"

#include "cc/output/context_provider.h"
#include "content/common/gpu/client/gpu_channel_host.h"
#include "content/common/gpu/gpu_messages.h"
#include "content/renderer/gpu/stream_texture_host_android.h"
#include "gpu/command_buffer/client/gles2_interface.h"
#include "ui/gfx/size.h"

namespace content {

namespace {

class StreamTextureProxyImpl : public StreamTextureProxy,
                               public StreamTextureHost::Listener {
 public:
  explicit StreamTextureProxyImpl(StreamTextureHost* host);
  virtual ~StreamTextureProxyImpl();

  // StreamTextureProxy implementation:
  virtual void BindToCurrentThread(int32 stream_id) OVERRIDE;
  virtual void SetClient(cc::VideoFrameProvider::Client* client) OVERRIDE;
  virtual void Release() OVERRIDE;

  // StreamTextureHost::Listener implementation:
  virtual void OnFrameAvailable() OVERRIDE;
  virtual void OnMatrixChanged(const float matrix[16]) OVERRIDE;

 private:
  scoped_ptr<StreamTextureHost> host_;
  scoped_refptr<base::MessageLoopProxy> loop_;

  base::Lock client_lock_;
  cc::VideoFrameProvider::Client* client_;

  DISALLOW_IMPLICIT_CONSTRUCTORS(StreamTextureProxyImpl);
};

StreamTextureProxyImpl::StreamTextureProxyImpl(StreamTextureHost* host)
    : host_(host), client_(NULL) {}

StreamTextureProxyImpl::~StreamTextureProxyImpl() {}

void StreamTextureProxyImpl::Release() {
  SetClient(NULL);
  if (loop_.get() && loop_.get() != base::MessageLoopProxy::current())
    loop_->DeleteSoon(FROM_HERE, this);
  else
    delete this;
}

void StreamTextureProxyImpl::SetClient(cc::VideoFrameProvider::Client* client) {
  base::AutoLock lock(client_lock_);
  client_ = client;
}

void StreamTextureProxyImpl::BindToCurrentThread(int stream_id) {
  loop_ = base::MessageLoopProxy::current();
  host_->BindToCurrentThread(stream_id, this);
}

void StreamTextureProxyImpl::OnFrameAvailable() {
  base::AutoLock lock(client_lock_);
  if (client_)
    client_->DidReceiveFrame();
}

void StreamTextureProxyImpl::OnMatrixChanged(const float matrix[16]) {
  base::AutoLock lock(client_lock_);
  if (client_)
    client_->DidUpdateMatrix(matrix);
}

}  // namespace

// static
scoped_refptr<StreamTextureFactoryImpl> StreamTextureFactoryImpl::Create(
    const scoped_refptr<cc::ContextProvider>& context_provider,
    GpuChannelHost* channel,
    int view_id) {
  return new StreamTextureFactoryImpl(context_provider, channel, view_id);
}

StreamTextureFactoryImpl::StreamTextureFactoryImpl(
    const scoped_refptr<cc::ContextProvider>& context_provider,
    GpuChannelHost* channel,
    int view_id)
    : context_provider_(context_provider),
      channel_(channel),
      view_id_(view_id) {
  DCHECK(channel);
}

StreamTextureFactoryImpl::~StreamTextureFactoryImpl() {}

StreamTextureProxy* StreamTextureFactoryImpl::CreateProxy() {
  DCHECK(channel_.get());
  StreamTextureHost* host = new StreamTextureHost(channel_.get());
  return new StreamTextureProxyImpl(host);
}

void StreamTextureFactoryImpl::EstablishPeer(int32 stream_id, int player_id) {
  DCHECK(channel_.get());
  channel_->Send(
      new GpuStreamTextureMsg_EstablishPeer(stream_id, view_id_, player_id));
}

unsigned StreamTextureFactoryImpl::CreateStreamTexture(
    unsigned texture_target,
    unsigned* texture_id,
    gpu::Mailbox* texture_mailbox) {
  GLuint stream_id = 0;
  gpu::gles2::GLES2Interface* gl = context_provider_->ContextGL();
  gl->GenTextures(1, texture_id);

  stream_id = gl->CreateStreamTextureCHROMIUM(*texture_id);

  gl->GenMailboxCHROMIUM(texture_mailbox->name);
  gl->BindTexture(texture_target, *texture_id);
  gl->ProduceTextureCHROMIUM(texture_target, texture_mailbox->name);
  return stream_id;
}

void StreamTextureFactoryImpl::SetStreamTextureSize(int32 stream_id,
                                                    const gfx::Size& size) {
  channel_->Send(new GpuStreamTextureMsg_SetSize(stream_id, size));
}

gpu::gles2::GLES2Interface* StreamTextureFactoryImpl::ContextGL() {
  return context_provider_->ContextGL();
}

}  // namespace content