media/video/video_encoder_info.h

// Copyright 2019 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_VIDEO_ENCODER_INFO_H_
#define MEDIA_VIDEO_VIDEO_ENCODER_INFO_H_

#include <stdint.h>
#include <string>
#include <vector>

#include "base/optional.h"
#include "media/base/media_export.h"
#include "ui/gfx/geometry/size.h"

namespace media {

// These chromium classes are the corresponding classes in webrtc project.
// See third_party/webrtc/api/video_codecs/video_encoder.h for the detail.

struct MEDIA_EXPORT ScalingSettings {
  ScalingSettings();
  ScalingSettings(int min_qp, int max_qp);
  ScalingSettings(const ScalingSettings&);
  ~ScalingSettings();

  // Quantization Parameter in ScalingSettings are codec specific.
  // The range of qp is 0-51 (H264), 0-127 (VP8) and 0-255 (VP9 and AV1).
  int min_qp = 0;
  int max_qp = 255;
};

struct MEDIA_EXPORT ResolutionBitrateLimit {
  ResolutionBitrateLimit();
  ResolutionBitrateLimit(const ResolutionBitrateLimit&);
  ResolutionBitrateLimit(const gfx::Size& frame_size,
                         int min_start_bitrate_bps,
                         int min_bitrate_bps,
                         int max_bitrate_bps);
  ~ResolutionBitrateLimit();

  gfx::Size frame_size;
  int min_start_bitrate_bps = 0;
  int min_bitrate_bps = 0;
  int max_bitrate_bps = 0;
};

struct MEDIA_EXPORT VideoEncoderInfo {
  static constexpr size_t kMaxSpatialLayers = 5;

  VideoEncoderInfo();
  VideoEncoderInfo(const VideoEncoderInfo&);
  ~VideoEncoderInfo();

  std::string implementation_name;

  bool supports_native_handle = true;
  bool has_trusted_rate_controller = false;
  bool is_hardware_accelerated = true;
  bool supports_simulcast = false;

  base::Optional<ScalingSettings> scaling_settings;
  std::vector<uint8_t> fps_allocation[kMaxSpatialLayers];
  std::vector<ResolutionBitrateLimit> resolution_bitrate_limits;
};

}  // namespace media

#endif  // MEDIA_VIDEO_VIDEO_ENCODER_INFO_H_