text: // Copyright 2020 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 MEDIA_VIDEO_VPX_VIDEO_ENCODER_H_
  #define MEDIA_VIDEO_VPX_VIDEO_ENCODER_H_
  
  #include <memory>
  #include <vector>
  
  #include "base/time/time.h"
  #include "media/base/media_export.h"
  #include "media/base/video_encoder.h"
  #include "media/base/video_frame_pool.h"
  #include "third_party/libvpx/source/libvpx/vpx/vpx_encoder.h"
  #include "ui/gfx/color_space.h"
  #include "ui/gfx/geometry/size.h"
  
  namespace media {
  
  class MEDIA_EXPORT VpxVideoEncoder : public VideoEncoder {
   public:
    VpxVideoEncoder();
    ~VpxVideoEncoder() override;
  
    // VideoDecoder implementation.
    void Initialize(VideoCodecProfile profile,
                    const Options& options,
                    OutputCB output_cb,
                    EncoderStatusCB done_cb) override;
    void Encode(scoped_refptr<VideoFrame> frame,
                bool key_frame,
                EncoderStatusCB done_cb) override;
    void ChangeOptions(const Options& options,
                       OutputCB output_cb,
                       EncoderStatusCB done_cb) override;
    void Flush(EncoderStatusCB done_cb) override;
  
   private:
    base::TimeDelta GetFrameDuration(const VideoFrame& frame);
    void DrainOutputs(int temporal_id,
                      base::TimeDelta ts,
                      gfx::ColorSpace color_space);
  
    using vpx_codec_unique_ptr =
        std::unique_ptr<vpx_codec_ctx_t, void (*)(vpx_codec_ctx_t*)>;
  
    vpx_codec_unique_ptr codec_;
    vpx_codec_enc_cfg_t codec_config_ = {};
    vpx_image_t vpx_image_ = {};
    gfx::Size originally_configured_size_;
    base::TimeDelta last_frame_timestamp_;
    gfx::ColorSpace last_frame_color_space_;
    int temporal_svc_frame_index = 0;
    VideoCodecProfile profile_ = VIDEO_CODEC_PROFILE_UNKNOWN;
    VideoFramePool frame_pool_;
    std::vector<uint8_t> resize_buf_;
    Options options_;
    OutputCB output_cb_;
  };
  
  }  // namespace media
  #endif  // MEDIA_VIDEO_VPX_VIDEO_ENCODER_H_
  