content/renderer/pepper/pepper_video_encoder_host.h

   1 // Copyright 2015 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 #ifndef CONTENT_RENDERER_PEPPER_PEPPER_VIDEO_ENCODER_HOST_H_
   6 #define CONTENT_RENDERER_PEPPER_PEPPER_VIDEO_ENCODER_HOST_H_
   7
   8 #include "base/memory/ref_counted.h"
   9 #include "base/memory/scoped_ptr.h"
  10 #include "base/memory/scoped_vector.h"
  11 #include "content/common/content_export.h"
  12 #include "media/video/video_encode_accelerator.h"
  13 #include "ppapi/c/pp_codecs.h"
  14 #include "ppapi/c/ppb_video_frame.h"
  15 #include "ppapi/host/host_message_context.h"
  16 #include "ppapi/host/resource_host.h"
  17 #include "ppapi/proxy/resource_message_params.h"
  18 #include "ppapi/shared_impl/media_stream_buffer_manager.h"
  19
  20 namespace media {
  21 class GpuVideoAcceleratorFactories;
  22 }
  23
  24 namespace content {
  25
  26 class CommandBufferProxyImpl;
  27 class GpuChannelHost;
  28 class RendererPpapiHost;
  29
  30 class CONTENT_EXPORT PepperVideoEncoderHost
  31     : public ppapi::host::ResourceHost,
  32       public media::VideoEncodeAccelerator::Client,
  33       public ppapi::MediaStreamBufferManager::Delegate {
  34  public:
  35   PepperVideoEncoderHost(RendererPpapiHost* host,
  36                          PP_Instance instance,
  37                          PP_Resource resource);
  38   ~PepperVideoEncoderHost() override;
  39
  40  private:
  41   // Shared memory buffers.
  42   struct ShmBuffer {
  43     ShmBuffer(uint32_t id, scoped_ptr<base::SharedMemory> shm);
  44     ~ShmBuffer();
  45
  46     media::BitstreamBuffer ToBitstreamBuffer();
  47
  48     // Index of the buffer in the ScopedVector. Buffers have the same id in
  49     // the plugin and the host.
  50     uint32_t id;
  51     scoped_ptr<base::SharedMemory> shm;
  52     bool in_use;
  53   };
  54
  55   // media::VideoEncodeAccelerator implementation.
  56   void RequireBitstreamBuffers(unsigned int input_count,
  57                                const gfx::Size& input_coded_size,
  58                                size_t output_buffer_size) override;
  59   void BitstreamBufferReady(int32 bitstream_buffer_id,
  60                             size_t payload_size,
  61                             bool key_frame) override;
  62   void NotifyError(media::VideoEncodeAccelerator::Error error) override;
  63
  64   // ResourceHost implementation.
  65   int32_t OnResourceMessageReceived(
  66       const IPC::Message& msg,
  67       ppapi::host::HostMessageContext* context) override;
  68
  69   int32_t OnHostMsgGetSupportedProfiles(
  70       ppapi::host::HostMessageContext* context);
  71   int32_t OnHostMsgInitialize(ppapi::host::HostMessageContext* context,
  72                               PP_VideoFrame_Format input_format,
  73                               const PP_Size& input_visible_size,
  74                               PP_VideoProfile output_profile,
  75                               uint32_t initial_bitrate,
  76                               PP_HardwareAcceleration acceleration);
  77   int32_t OnHostMsgGetVideoFrames(ppapi::host::HostMessageContext* context);
  78   int32_t OnHostMsgEncode(ppapi::host::HostMessageContext* context,
  79                           uint32_t frame_id,
  80                           bool force_keyframe);
  81   int32_t OnHostMsgRecycleBitstreamBuffer(
  82       ppapi::host::HostMessageContext* context,
  83       uint32_t buffer_id);
  84   int32_t OnHostMsgRequestEncodingParametersChange(
  85       ppapi::host::HostMessageContext* context,
  86       uint32_t bitrate,
  87       uint32_t framerate);
  88   int32_t OnHostMsgClose(ppapi::host::HostMessageContext* context);
  89
  90   // Internal methods.
  91   void GetSupportedProfiles(
  92       std::vector<PP_VideoProfileDescription>* pp_profiles);
  93   bool IsInitializationValid(const PP_Size& input_size,
  94                              PP_VideoProfile ouput_profile,
  95                              PP_HardwareAcceleration acceleration);
  96   bool EnsureGpuChannel();
  97   bool InitializeHardware(media::VideoFrame::Format input_format,
  98                           const gfx::Size& input_visible_size,
  99                           media::VideoCodecProfile output_profile,
 100                           uint32_t initial_bitrate);
 101   void Close();
 102   void AllocateVideoFrames();
 103   void SendGetFramesErrorReply(int32_t error);
 104   scoped_refptr<media::VideoFrame> CreateVideoFrame(
 105       uint32_t frame_id,
 106       const ppapi::host::ReplyMessageContext& reply_context);
 107   void FrameReleased(const ppapi::host::ReplyMessageContext& reply_context,
 108                      uint32_t frame_id);
 109   void NotifyPepperError(int32_t error);
 110
 111   // Non-owning pointer.
 112   RendererPpapiHost* renderer_ppapi_host_;
 113
 114   ScopedVector<ShmBuffer> shm_buffers_;
 115
 116   // Buffer manager for shared memory that holds video frames.
 117   ppapi::MediaStreamBufferManager buffer_manager_;
 118
 119   scoped_refptr<GpuChannelHost> channel_;
 120   CommandBufferProxyImpl* command_buffer_;
 121
 122   scoped_ptr<media::VideoEncodeAccelerator> encoder_;
 123
 124   // Whether the encoder has been successfully initialized.
 125   bool initialized_;
 126
 127   // Saved context to answer an Initialize message from the plugin.
 128   ppapi::host::ReplyMessageContext initialize_reply_context_;
 129
 130   // Saved context to answer a GetVideoFrames message from the plugin.
 131   ppapi::host::ReplyMessageContext get_video_frames_reply_context_;
 132
 133   // This represents the current error state of the encoder, i.e. PP_OK
 134   // normally, or a Pepper error code if the encoder is uninitialized,
 135   // has been notified of an encoder error, has encountered some
 136   // other unrecoverable error, or has been closed by  the plugin.
 137   // This field is checked in most message handlers to decide whether
 138   // operations should proceed or fail.
 139   int32_t encoder_last_error_;
 140
 141   // Size of the frames allocated for the encoder (matching hardware
 142   // constraints).
 143   gfx::Size input_coded_size_;
 144
 145   // Number of frames the encoder needs.
 146   uint32_t frame_count_;
 147
 148   // Format of the frames to give to the encoder.
 149   media::VideoFrame::Format media_input_format_;
 150
 151   base::WeakPtrFactory<PepperVideoEncoderHost> weak_ptr_factory_;
 152
 153   DISALLOW_COPY_AND_ASSIGN(PepperVideoEncoderHost);
 154 };
 155
 156 }  // namespace content
 157
 158 #endif  // CONTENT_RENDERER_PEPPER_PEPPER_VIDEO_ENCODER_HOST_H_