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/* Copyright (c) 2013 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 WEBRTC_MODULES_VIDEO_CODING_CODECS_VP8_SCREENSHARE_LAYERS_H_
#define WEBRTC_MODULES_VIDEO_CODING_CODECS_VP8_SCREENSHARE_LAYERS_H_
#include <list>
#include "vpx/vpx_encoder.h"
#include "webrtc/base/timeutils.h"
#include "webrtc/modules/video_coding/codecs/vp8/temporal_layers.h"
#include "webrtc/modules/video_coding/utility/frame_dropper.h"
#include "webrtc/typedefs.h"
namespace webrtc {
struct CodecSpecificInfoVP8;
class ScreenshareLayers : public TemporalLayers {
public:
static const double kMaxTL0FpsReduction;
static const double kAcceptableTargetOvershoot;
static const int kTl0Flags;
static const int kTl1Flags;
static const int kTl1SyncFlags;
ScreenshareLayers(int num_temporal_layers, uint8_t initial_tl0_pic_idx);
virtual ~ScreenshareLayers() {}
// Returns the recommended VP8 encode flags needed. May refresh the decoder
// and/or update the reference buffers.
int EncodeFlags(uint32_t timestamp) override;
bool ConfigureBitrates(int bitrate_kbps,
int max_bitrate_kbps,
int framerate,
vpx_codec_enc_cfg_t* cfg) override;
void PopulateCodecSpecific(bool base_layer_sync,
CodecSpecificInfoVP8* vp8_info,
uint32_t timestamp) override;
void FrameEncoded(unsigned int size, uint32_t timestamp, int qp) override;
int CurrentLayerId() const override;
// Allows the layers adapter to update the encoder configuration prior to a
// frame being encoded. Return true if the configuration should be updated
// and false if now change is needed.
bool UpdateConfiguration(vpx_codec_enc_cfg_t* cfg) override;
private:
bool TimeToSync(int64_t timestamp) const;
int number_of_temporal_layers_;
bool last_base_layer_sync_;
uint8_t tl0_pic_idx_;
int active_layer_;
int64_t last_timestamp_;
int64_t last_sync_timestamp_;
rtc::TimestampWrapAroundHandler time_wrap_handler_;
int min_qp_;
int max_qp_;
uint32_t max_debt_bytes_;
int frame_rate_;
static const int kMaxNumTemporalLayers = 2;
struct TemporalLayer {
TemporalLayer()
: state(State::kNormal),
enhanced_max_qp(-1),
last_qp(-1),
debt_bytes_(0),
target_rate_kbps_(0) {}
enum class State {
kNormal,
kDropped,
kReencoded,
kQualityBoost,
} state;
int enhanced_max_qp;
int last_qp;
uint32_t debt_bytes_;
uint32_t target_rate_kbps_;
void UpdateDebt(int64_t delta_ms);
} layers_[kMaxNumTemporalLayers];
};
} // namespace webrtc
#endif // WEBRTC_MODULES_VIDEO_CODING_CODECS_VP8_SCREENSHARE_LAYERS_H_
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