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/*
* Copyright (c) 2020 The WebM 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 VPX_VP9_RATECTRL_RTC_H_
#define VPX_VP9_RATECTRL_RTC_H_
#include <cstdint>
#include <memory>
#include "vp9/common/vp9_enums.h"
#include "vp9/vp9_iface_common.h"
#include "vp9/encoder/vp9_aq_cyclicrefresh.h"
#include "vp9/vp9_cx_iface.h"
#include "vpx/internal/vpx_ratectrl_rtc.h"
#include "vpx_mem/vpx_mem.h"
struct VP9_COMP;
namespace libvpx {
struct VP9RateControlRtcConfig : public VpxRateControlRtcConfig {
public:
VP9RateControlRtcConfig() {
ss_number_layers = 1;
vp9_zero(max_quantizers);
vp9_zero(min_quantizers);
vp9_zero(scaling_factor_den);
vp9_zero(scaling_factor_num);
vp9_zero(layer_target_bitrate);
vp9_zero(ts_rate_decimator);
scaling_factor_num[0] = 1;
scaling_factor_den[0] = 1;
max_quantizers[0] = max_quantizer;
min_quantizers[0] = min_quantizer;
}
// Number of spatial layers
int ss_number_layers;
int max_quantizers[VPX_MAX_LAYERS];
int min_quantizers[VPX_MAX_LAYERS];
int scaling_factor_num[VPX_SS_MAX_LAYERS];
int scaling_factor_den[VPX_SS_MAX_LAYERS];
};
struct VP9FrameParamsQpRTC {
RcFrameType frame_type;
int spatial_layer_id;
int temporal_layer_id;
};
struct VP9SegmentationData {
const uint8_t *segmentation_map;
size_t segmentation_map_size;
const int *delta_q;
size_t delta_q_size;
};
// This interface allows using VP9 real-time rate control without initializing
// the encoder. To use this interface, you need to link with libvpxrc.a.
//
// #include "vp9/ratectrl_rtc.h"
// VP9RateControlRtcConfig cfg;
// VP9FrameParamsQpRTC frame_params;
//
// YourFunctionToInitializeConfig(cfg);
// std::unique_ptr<VP9RateControlRTC> rc_api = VP9RateControlRTC::Create(cfg);
// // start encoding
// while (frame_to_encode) {
// if (config_changed)
// rc_api->UpdateRateControl(cfg);
// YourFunctionToFillFrameParams(frame_params);
// rc_api->ComputeQP(frame_params);
// YourFunctionToUseQP(rc_api->GetQP());
// YourFunctionToUseLoopfilter(rc_api->GetLoopfilterLevel());
// // After encoding
// rc_api->PostEncode(encoded_frame_size, frame_params);
// }
class VP9RateControlRTC {
public:
static std::unique_ptr<VP9RateControlRTC> Create(
const VP9RateControlRtcConfig &cfg);
~VP9RateControlRTC();
bool UpdateRateControl(const VP9RateControlRtcConfig &rc_cfg);
// GetQP() needs to be called after ComputeQP() to get the latest QP
int GetQP() const;
int GetLoopfilterLevel() const;
bool GetSegmentationData(VP9SegmentationData *segmentation_data) const;
void ComputeQP(const VP9FrameParamsQpRTC &frame_params);
// Feedback to rate control with the size of current encoded frame
void PostEncodeUpdate(uint64_t encoded_frame_size,
const VP9FrameParamsQpRTC &frame_params);
private:
VP9RateControlRTC() {}
bool InitRateControl(const VP9RateControlRtcConfig &cfg);
struct VP9_COMP *cpi_;
};
} // namespace libvpx
#endif // VPX_VP9_RATECTRL_RTC_H_
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