media/video/fake_video_encode_accelerator.h

   1 // Copyright 2014 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 MEDIA_VIDEO_FAKE_VIDEO_ENCODE_ACCELERATOR_H_
   6 #define MEDIA_VIDEO_FAKE_VIDEO_ENCODE_ACCELERATOR_H_
   7
   8 #include <list>
   9 #include <queue>
  10 #include <vector>
  11
  12 #include "base/memory/weak_ptr.h"
  13 #include "media/base/bitstream_buffer.h"
  14 #include "media/base/media_export.h"
  15 #include "media/video/video_encode_accelerator.h"
  16
  17 namespace base {
  18
  19 class SingleThreadTaskRunner;
  20
  21 }  // namespace base
  22
  23 namespace media {
  24
  25 class MEDIA_EXPORT FakeVideoEncodeAccelerator : public VideoEncodeAccelerator {
  26  public:
  27   explicit FakeVideoEncodeAccelerator(
  28       const scoped_refptr<base::SingleThreadTaskRunner>& task_runner);
  29   ~FakeVideoEncodeAccelerator() override;
  30
  31   VideoEncodeAccelerator::SupportedProfiles GetSupportedProfiles() override;
  32   bool Initialize(VideoFrame::Format input_format,
  33                   const gfx::Size& input_visible_size,
  34                   VideoCodecProfile output_profile,
  35                   uint32 initial_bitrate,
  36                   Client* client) override;
  37   void Encode(const scoped_refptr<VideoFrame>& frame,
  38               bool force_keyframe) override;
  39   void UseOutputBitstreamBuffer(const BitstreamBuffer& buffer) override;
  40   void RequestEncodingParametersChange(uint32 bitrate,
  41                                        uint32 framerate) override;
  42   void Destroy() override;
  43
  44   const std::vector<uint32>& stored_bitrates() const {
  45     return stored_bitrates_;
  46   }
  47   void SendDummyFrameForTesting(bool key_frame);
  48   void SetWillInitializationSucceed(bool will_initialization_succeed);
  49
  50  private:
  51   void DoRequireBitstreamBuffers(unsigned int input_count,
  52                                  const gfx::Size& input_coded_size,
  53                                  size_t output_buffer_size) const;
  54   void EncodeTask();
  55   void DoBitstreamBufferReady(int32 bitstream_buffer_id,
  56                               size_t payload_size,
  57                               bool key_frame) const;
  58
  59   // Our original (constructor) calling message loop used for all tasks.
  60   const scoped_refptr<base::SingleThreadTaskRunner> task_runner_;
  61   std::vector<uint32> stored_bitrates_;
  62   bool will_initialization_succeed_;
  63
  64   VideoEncodeAccelerator::Client* client_;
  65
  66   // Keeps track of if the current frame is the first encoded frame. This
  67   // is used to force a fake key frame for the first encoded frame.
  68   bool next_frame_is_first_frame_;
  69
  70   // A queue containing the necessary data for incoming frames. The boolean
  71   // represent whether the queued frame should force a key frame.
  72   std::queue<bool> queued_frames_;
  73
  74   // A list of buffers available for putting fake encoded frames in.
  75   std::list<BitstreamBuffer> available_buffers_;
  76
  77   base::WeakPtrFactory<FakeVideoEncodeAccelerator> weak_this_factory_;
  78
  79   DISALLOW_COPY_AND_ASSIGN(FakeVideoEncodeAccelerator);
  80 };
  81
  82 }  // namespace media
  83
  84 #endif  // MEDIA_VIDEO_FAKE_VIDEO_ENCODE_ACCELERATOR_H_