webrtc/api/video_codecs/vp8_temporal_layers.h
Elad Alon cde8ab265e Use single FrameBufferController in VP8, created by a factory.
This CL paves the way to making FrameBufferController injectable.

LibvpxVp8Encoder can manage multiple streams. Prior to this CL,
each stream had its own frame buffer controller, all of them held
in a vector by LibvpxVp8Encoder. This complicated the code and
produced some code duplication (cf. SetupTemporalLayers).

This CL:
1. Replaces CreateVp8TemporalLayers() by a factory. (Later CLs
   will make this factory injectable.)
2. Makes LibvpxVp8Encoder use a single controller. This single
   controller will, in the case of multiple streams, delegate
   its work to multiple controllers, but that fact is not visible
   to LibvpxVp8Encoder.

This CL also squashes CL #126046 (Send notifications of RTT and
PLR changes to Vp8FrameBufferController) into it.

Bug: webrtc:10382
Change-Id: Id9b55734bebb457acc276f34a7a9e52cc19c8eb9
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/126483
Commit-Queue: Elad Alon <eladalon@webrtc.org>
Reviewed-by: Erik Språng <sprang@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#27206}
2019-03-20 11:54:02 +00:00

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2.3 KiB
C++

/*
* Copyright (c) 2018 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_VP8_TEMPORAL_LAYERS_H_
#define API_VIDEO_CODECS_VP8_TEMPORAL_LAYERS_H_
#include <memory>
#include <vector>
#include "api/video_codecs/video_codec.h"
#include "api/video_codecs/vp8_frame_buffer_controller.h"
#include "api/video_codecs/vp8_frame_config.h"
namespace webrtc {
// Two different flavors of temporal layers are currently available:
// kFixedPattern uses a fixed repeating pattern of 1-4 layers.
// kBitrateDynamic can allocate frames dynamically to 1 or 2 layers, based on
// the bitrate produced.
// TODO(eladalon): Remove this enum.
enum class Vp8TemporalLayersType { kFixedPattern, kBitrateDynamic };
// This interface defines a way of getting the encoder settings needed to
// realize a temporal layer structure.
class Vp8TemporalLayers final : public Vp8FrameBufferController {
public:
explicit Vp8TemporalLayers(
std::vector<std::unique_ptr<Vp8FrameBufferController>>&& controllers);
~Vp8TemporalLayers() override = default;
size_t StreamCount() const override;
bool SupportsEncoderFrameDropping(size_t stream_index) const override;
void OnRatesUpdated(size_t stream_index,
const std::vector<uint32_t>& bitrates_bps,
int framerate_fps) override;
bool UpdateConfiguration(size_t stream_index, Vp8EncoderConfig* cfg) override;
Vp8FrameConfig UpdateLayerConfig(size_t stream_index,
uint32_t rtp_timestamp) override;
void OnEncodeDone(size_t stream_index,
uint32_t rtp_timestamp,
size_t size_bytes,
bool is_keyframe,
int qp,
CodecSpecificInfo* info) override;
void OnPacketLossRateUpdate(float packet_loss_rate) override;
void OnRttUpdate(int64_t rtt_ms) override;
private:
std::vector<std::unique_ptr<Vp8FrameBufferController>> controllers_;
};
} // namespace webrtc
#endif // API_VIDEO_CODECS_VP8_TEMPORAL_LAYERS_H_