remoting/codec/video_encoder_vpx.h

   1 // Copyright 2013 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 REMOTING_CODEC_VIDEO_ENCODER_VPX_H_
   6 #define REMOTING_CODEC_VIDEO_ENCODER_VPX_H_
   7
   8 #include "base/callback.h"
   9 #include "base/time/time.h"
  10 #include "remoting/codec/scoped_vpx_codec.h"
  11 #include "remoting/codec/video_encoder.h"
  12 #include "remoting/codec/video_encoder_helper.h"
  13
  14 typedef struct vpx_image vpx_image_t;
  15
  16 namespace webrtc {
  17 class DesktopRegion;
  18 class DesktopSize;
  19 }  // namespace webrtc
  20
  21 namespace remoting {
  22
  23 class VideoEncoderVpx : public VideoEncoder {
  24  public:
  25   // Create encoder for the specified protocol.
  26   static scoped_ptr<VideoEncoderVpx> CreateForVP8();
  27   static scoped_ptr<VideoEncoderVpx> CreateForVP9();
  28
  29   ~VideoEncoderVpx() override;
  30
  31   // VideoEncoder interface.
  32   void SetLosslessEncode(bool want_lossless) override;
  33   void SetLosslessColor(bool want_lossless) override;
  34   scoped_ptr<VideoPacket> Encode(const webrtc::DesktopFrame& frame) override;
  35
  36  private:
  37   explicit VideoEncoderVpx(bool use_vp9);
  38
  39   // Initializes the codec for frames of |size|. Returns true if successful.
  40   bool Initialize(const webrtc::DesktopSize& size);
  41
  42   // Prepares |image_| for encoding. Writes updated rectangles into
  43   // |updated_region|.
  44   void PrepareImage(const webrtc::DesktopFrame& frame,
  45                     webrtc::DesktopRegion* updated_region);
  46
  47   // Updates the active map according to |updated_region|. Active map is then
  48   // given to the encoder to speed up encoding.
  49   void PrepareActiveMap(const webrtc::DesktopRegion& updated_region);
  50
  51   // True if the encoder should generate VP9, false for VP8.
  52   bool use_vp9_;
  53
  54   // Options controlling VP9 encode quantization and color space.
  55   // These are always off (false) for VP8.
  56   bool lossless_encode_;
  57   bool lossless_color_;
  58
  59   ScopedVpxCodec codec_;
  60   base::TimeTicks timestamp_base_;
  61
  62   // VPX image and buffer to hold the actual YUV planes.
  63   scoped_ptr<vpx_image_t> image_;
  64   scoped_ptr<uint8[]> image_buffer_;
  65
  66   // Active map used to optimize out processing of un-changed macroblocks.
  67   scoped_ptr<uint8[]> active_map_;
  68   int active_map_width_;
  69   int active_map_height_;
  70
  71   // Used to help initialize VideoPackets from DesktopFrames.
  72   VideoEncoderHelper helper_;
  73
  74   DISALLOW_COPY_AND_ASSIGN(VideoEncoderVpx);
  75 };
  76
  77 }  // namespace remoting
  78
  79 #endif  // REMOTING_CODEC_VIDEO_ENCODER_VP8_H_