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/* Copyright (c) 2011 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.
*/
/*
* This file defines the interface for doing temporal layers with VP8.
*/
#ifndef WEBRTC_MODULES_VIDEO_CODING_CODECS_VP8_TEMPORAL_LAYERS_H_
#define WEBRTC_MODULES_VIDEO_CODING_CODECS_VP8_TEMPORAL_LAYERS_H_
#include "vpx/vpx_encoder.h"
#include "webrtc/common_video/interface/video_image.h"
#include "webrtc/typedefs.h"
namespace webrtc {
struct CodecSpecificInfoVP8;
class TemporalLayers {
public:
// Factory for TemporalLayer strategy. Default behaviour is a fixed pattern
// of temporal layers. See default_temporal_layers.cc
struct Factory {
Factory() {}
virtual ~Factory() {}
virtual TemporalLayers* Create(int temporal_layers,
uint8_t initial_tl0_pic_idx) const;
};
virtual ~TemporalLayers() {}
// Returns the recommended VP8 encode flags needed. May refresh the decoder
// and/or update the reference buffers.
virtual int EncodeFlags(uint32_t timestamp) = 0;
virtual bool ConfigureBitrates(int bitrate_kbit,
int max_bitrate_kbit,
int framerate,
vpx_codec_enc_cfg_t* cfg) = 0;
virtual void PopulateCodecSpecific(bool base_layer_sync,
CodecSpecificInfoVP8* vp8_info,
uint32_t timestamp) = 0;
virtual void FrameEncoded(unsigned int size, uint32_t timestamp) = 0;
virtual int CurrentLayerId() const = 0;
};
// Factory for a temporal layers strategy that adaptively changes the number of
// layers based on input framerate so that the base layer has an acceptable
// framerate. See realtime_temporal_layers.cc
struct RealTimeTemporalLayersFactory : TemporalLayers::Factory {
virtual ~RealTimeTemporalLayersFactory() {}
virtual TemporalLayers* Create(int num_temporal_layers,
uint8_t initial_tl0_pic_idx) const;
};
} // namespace webrtc
#endif // WEBRTC_MODULES_VIDEO_CODING_CODECS_VP8_TEMPORAL_LAYERS_H_
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