content: pepper: VideoEncoder: add software encoder support

content/renderer/pepper/pepper_video_encoder_host.h

 // Copyright 2015 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.
 
 #ifndef CONTENT_RENDERER_PEPPER_PEPPER_VIDEO_ENCODER_HOST_H_
 #define CONTENT_RENDERER_PEPPER_PEPPER_VIDEO_ENCODER_HOST_H_
 
 #include "base/memory/ref_counted.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/memory/scoped_vector.h"
 #include "content/common/content_export.h"
 #include "media/video/video_encode_accelerator.h"
 #include "ppapi/c/pp_codecs.h"
 #include "ppapi/c/ppb_video_frame.h"
 #include "ppapi/host/host_message_context.h"
 #include "ppapi/host/resource_host.h"
 #include "ppapi/proxy/resource_message_params.h"
 #include "ppapi/shared_impl/media_stream_buffer_manager.h"
 
 namespace media {
 class GpuVideoAcceleratorFactories;
 }
 
 namespace content {
 
 class CommandBufferProxyImpl;
 class GpuChannelHost;
 class RendererPpapiHost;
+class VideoEncoderShim;
 
 class CONTENT_EXPORT PepperVideoEncoderHost
     : public ppapi::host::ResourceHost,
       public media::VideoEncodeAccelerator::Client,
       public ppapi::MediaStreamBufferManager::Delegate {
  public:
   PepperVideoEncoderHost(RendererPpapiHost* host,
                          PP_Instance instance,
                          PP_Resource resource);
   ~PepperVideoEncoderHost() override;
 
  private:
+  friend class VideoEncoderShim;
+
   // Shared memory buffers.
   struct ShmBuffer {
     ShmBuffer(uint32_t id, scoped_ptr<base::SharedMemory> shm);
     ~ShmBuffer();
 
     media::BitstreamBuffer ToBitstreamBuffer();
 
     // Index of the buffer in the ScopedVector. Buffers have the same id in
     // the plugin and the host.
     uint32_t id;
@@ skipping 50 matching lines @@
   void Close();
   void AllocateVideoFrames();
   void SendGetFramesErrorReply(int32_t error);
   scoped_refptr<media::VideoFrame> CreateVideoFrame(
       uint32_t frame_id,
       const ppapi::host::ReplyMessageContext& reply_context);
   void FrameReleased(const ppapi::host::ReplyMessageContext& reply_context,
                      uint32_t frame_id);
   void NotifyPepperError(int32_t error);
 
+  // Helper method for VideoEncoderShim.
+  uint8_t* ShmHandleToAddress(int32 buffer_id);
+
   // Non-owning pointer.
   RendererPpapiHost* renderer_ppapi_host_;
 
   ScopedVector<ShmBuffer> shm_buffers_;
 
   // Buffer manager for shared memory that holds video frames.
   ppapi::MediaStreamBufferManager buffer_manager_;
 
   scoped_refptr<GpuChannelHost> channel_;
   CommandBufferProxyImpl* command_buffer_;
@@ skipping 28 matching lines @@
   media::VideoFrame::Format media_input_format_;
 
   base::WeakPtrFactory<PepperVideoEncoderHost> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(PepperVideoEncoderHost);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_RENDERER_PEPPER_PEPPER_VIDEO_ENCODER_HOST_H_