content/renderer/pepper/video_encoder_shim.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_VIDEO_ENCODER_SHIM_H_
   6 #define CONTENT_RENDERER_PEPPER_VIDEO_ENCODER_SHIM_H_
   7
   8 #include <vector>
   9
  10 #include "base/memory/scoped_ptr.h"
  11 #include "base/memory/weak_ptr.h"
  12 #include "media/video/video_encode_accelerator.h"
  13
  14 namespace base {
  15 class SingleThreadTaskRunner;
  16 }
  17
  18 namespace gfx {
  19 class Size;
  20 }
  21
  22 namespace content {
  23
  24 class PepperVideoEncoderHost;
  25
  26 // This class is a shim to wrap a media::cast::SoftwareVideoEncoder so that it
  27 // can be used by PepperVideoEncoderHost in place of a
  28 // media::VideoEncodeAccelerator. This class should be constructed, used, and
  29 // destructed on the main (render) thread.
  30 class VideoEncoderShim : public media::VideoEncodeAccelerator {
  31  public:
  32   explicit VideoEncoderShim(PepperVideoEncoderHost* host);
  33   ~VideoEncoderShim() override;
  34
  35   // media::VideoEncodeAccelerator implementation.
  36   std::vector<media::VideoEncodeAccelerator::SupportedProfile>
  37   GetSupportedProfiles() override;
  38   bool Initialize(media::VideoFrame::Format input_format,
  39                   const gfx::Size& input_visible_size,
  40                   media::VideoCodecProfile output_profile,
  41                   uint32 initial_bitrate,
  42                   media::VideoEncodeAccelerator::Client* client) override;
  43   void Encode(const scoped_refptr<media::VideoFrame>& frame,
  44               bool force_keyframe) override;
  45   void UseOutputBitstreamBuffer(const media::BitstreamBuffer& buffer) override;
  46   void RequestEncodingParametersChange(uint32 bitrate,
  47                                        uint32 framerate) override;
  48   void Destroy() override;
  49
  50  private:
  51   class EncoderImpl;
  52
  53   void OnRequireBitstreamBuffers(unsigned int input_count,
  54                                  const gfx::Size& input_coded_size,
  55                                  size_t output_buffer_size);
  56   void OnBitstreamBufferReady(scoped_refptr<media::VideoFrame> frame,
  57                               int32 bitstream_buffer_id,
  58                               size_t payload_size,
  59                               bool key_frame);
  60   void OnNotifyError(media::VideoEncodeAccelerator::Error error);
  61
  62   scoped_ptr<EncoderImpl> encoder_impl_;
  63
  64   PepperVideoEncoderHost* host_;
  65
  66   // Task doing the encoding.
  67   scoped_refptr<base::SingleThreadTaskRunner> media_task_runner_;
  68
  69   base::WeakPtrFactory<VideoEncoderShim> weak_ptr_factory_;
  70
  71   DISALLOW_COPY_AND_ASSIGN(VideoEncoderShim);
  72 };
  73
  74 }  // namespace content
  75
  76 #endif  // CONTENT_RENDERER_PEPPER_VIDEO_ENCODER_SHIM_H_