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/*
* Copyright (c) 2023 The WebRTC project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
#ifndef API_VIDEO_CODECS_VIDEO_ENCODER_INTERFACE_H_
#define API_VIDEO_CODECS_VIDEO_ENCODER_INTERFACE_H_
#include <cstdint>
#include <memory>
#include <optional>
#include <variant>
#include <vector>
#include "api/array_view.h"
#include "api/scoped_refptr.h"
#include "api/units/data_rate.h"
#include "api/units/data_size.h"
#include "api/units/time_delta.h"
#include "api/units/timestamp.h"
#include "api/video/resolution.h"
#include "api/video/video_frame_buffer.h"
#include "api/video_codecs/video_codec.h"
namespace webrtc {
// NOTE: This class is still under development and may change without notice.
class VideoEncoderInterface {
public:
virtual ~VideoEncoderInterface() = default;
enum class FrameType { kKeyframe, kStartFrame, kDeltaFrame };
struct EncodingError {};
struct EncodedData {
FrameType frame_type;
int encoded_qp;
};
using EncodeResult = std::variant<EncodingError, EncodedData>;
struct FrameOutput {
virtual ~FrameOutput() = default;
virtual ArrayView<uint8_t> GetBitstreamOutputBuffer(DataSize size) = 0;
virtual void EncodeComplete(const EncodeResult& encode_result) = 0;
};
struct TemporalUnitSettings {
VideoCodecMode content_hint = VideoCodecMode::kRealtimeVideo;
Timestamp presentation_timestamp;
};
struct FrameEncodeSettings {
struct Cbr {
TimeDelta duration;
DataRate target_bitrate;
};
struct Cqp {
int target_qp;
};
std::variant<Cqp, Cbr> rate_options;
FrameType frame_type = FrameType::kDeltaFrame;
int temporal_id = 0;
int spatial_id = 0;
Resolution resolution;
std::vector<int> reference_buffers;
std::optional<int> update_buffer;
int effort_level = 0;
std::unique_ptr<FrameOutput> frame_output;
};
virtual void Encode(scoped_refptr<VideoFrameBuffer> frame_buffer,
const TemporalUnitSettings& settings,
std::vector<FrameEncodeSettings> frame_settings) = 0;
};
} // namespace webrtc
#endif // API_VIDEO_CODECS_VIDEO_ENCODER_INTERFACE_H_
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