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/*
* Copyright (c) 2019 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.
*/
#include "api/video_codecs/vp8_temporal_layers_factory.h"
#include <algorithm>
#include <memory>
#include <utility>
#include <vector>
#include "api/fec_controller_override.h"
#include "api/video_codecs/video_codec.h"
#include "api/video_codecs/video_encoder.h"
#include "api/video_codecs/vp8_frame_buffer_controller.h"
#include "api/video_codecs/vp8_temporal_layers.h"
#include "modules/video_coding/codecs/vp8/default_temporal_layers.h"
#include "modules/video_coding/codecs/vp8/screenshare_layers.h"
#include "modules/video_coding/utility/simulcast_utility.h"
#include "rtc_base/checks.h"
namespace webrtc {
std::unique_ptr<Vp8FrameBufferController> Vp8TemporalLayersFactory::Create(
const VideoCodec& codec,
const VideoEncoder::Settings& settings,
FecControllerOverride* fec_controller_override) {
std::vector<std::unique_ptr<Vp8FrameBufferController>> controllers;
const int num_streams = SimulcastUtility::NumberOfSimulcastStreams(codec);
RTC_DCHECK_GE(num_streams, 1);
controllers.reserve(num_streams);
for (int i = 0; i < num_streams; ++i) {
int num_temporal_layers =
SimulcastUtility::NumberOfTemporalLayers(codec, i);
RTC_DCHECK_GE(num_temporal_layers, 1);
if (SimulcastUtility::IsConferenceModeScreenshare(codec) && i == 0) {
// Legacy screenshare layers supports max 2 layers.
num_temporal_layers = std::max(2, num_temporal_layers);
controllers.push_back(
std::make_unique<ScreenshareLayers>(num_temporal_layers));
} else {
controllers.push_back(
std::make_unique<DefaultTemporalLayers>(num_temporal_layers));
}
}
return std::make_unique<Vp8TemporalLayers>(std::move(controllers),
fec_controller_override);
}
std::unique_ptr<Vp8FrameBufferControllerFactory>
Vp8TemporalLayersFactory::Clone() const {
return std::make_unique<Vp8TemporalLayersFactory>();
}
} // namespace webrtc