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// Copyright 2022 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef REMOTING_CODEC_WEBRTC_VIDEO_ENCODER_AV1_H_
#define REMOTING_CODEC_WEBRTC_VIDEO_ENCODER_AV1_H_
#include "base/functional/callback.h"
#include "remoting/codec/encoder_bitrate_filter.h"
#include "remoting/codec/video_encoder_active_map.h"
#include "remoting/codec/webrtc_video_encoder.h"
#include "third_party/libaom/source/libaom/aom/aom_encoder.h"
#include "third_party/libaom/source/libaom/aom/aom_image.h"
#include "third_party/libaom/source/libaom/aom/aomcx.h"
namespace webrtc {
class DesktopFrame;
class DesktopRegion;
class DesktopSize;
} // namespace webrtc
namespace remoting {
// AV1 encoder implementation for WebRTC transport, params are optimized for
// real-time screen sharing.
class WebrtcVideoEncoderAV1 : public WebrtcVideoEncoder {
public:
WebrtcVideoEncoderAV1();
WebrtcVideoEncoderAV1(const WebrtcVideoEncoderAV1&) = delete;
WebrtcVideoEncoderAV1& operator=(const WebrtcVideoEncoderAV1&) = delete;
~WebrtcVideoEncoderAV1() override;
// WebrtcVideoEncoder interface.
void SetLosslessColor(bool want_lossless) override;
void SetUseActiveMap(bool use_active_map) override;
void SetEncoderSpeed(int encoder_speed) override;
void Encode(std::unique_ptr<webrtc::DesktopFrame> frame,
const FrameParams& params,
EncodeCallback done) override;
private:
void ConfigureCodecParams();
bool InitializeCodec(const webrtc::DesktopSize& size);
void UpdateConfig(const FrameParams& params);
void PrepareImage(const webrtc::DesktopFrame* frame,
webrtc::DesktopRegion& updated_region);
using scoped_aom_codec =
std::unique_ptr<aom_codec_ctx_t, void (*)(aom_codec_ctx_t*)>;
scoped_aom_codec codec_;
aom_codec_enc_cfg_t config_ = {};
using scoped_aom_image = std::unique_ptr<aom_image_t, void (*)(aom_image_t*)>;
scoped_aom_image image_;
// Indicates whether the frames provided to the encoder will use I420 (lossy)
// or I444 (lossless) format.
bool lossless_color_ = false;
int av1_encoder_speed_ = -1;
// An active map is used to skip processing of unchanged macroblocks.
VideoEncoderActiveMap active_map_data_;
aom_active_map_t active_map_;
// Disable |active_map_| by default until we've tuned it.
bool use_active_map_ = false;
// This timestamp is monotonically increased using the current frame duration.
// It's only used for rate control and is not related to the timestamps on the
// incoming frames to encode.
aom_codec_pts_t artificial_timestamp_ms_ = 0;
EncoderBitrateFilter bitrate_filter_;
};
} // namespace remoting
#endif // REMOTING_CODEC_WEBRTC_VIDEO_ENCODER_AV1_H_
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