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/*
* 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.
*/
#include "api/video_codecs/builtin_video_encoder_factory.h"
#include <memory>
#include <string>
#include <vector>
#include "absl/types/optional.h"
#include "api/environment/environment.h"
#include "api/video_codecs/sdp_video_format.h"
#include "api/video_codecs/video_encoder.h"
#include "api/video_codecs/video_encoder_factory.h"
#include "media/engine/internal_encoder_factory.h"
#include "media/engine/simulcast_encoder_adapter.h"
namespace webrtc {
namespace {
// This class wraps the internal factory and adds simulcast.
class BuiltinVideoEncoderFactory : public VideoEncoderFactory {
public:
BuiltinVideoEncoderFactory()
: internal_encoder_factory_(new InternalEncoderFactory()) {}
std::unique_ptr<VideoEncoder> Create(const Environment& env,
const SdpVideoFormat& format) override {
// Try creating an InternalEncoderFactory-backed SimulcastEncoderAdapter.
// The adapter has a passthrough mode for the case that simulcast is not
// used, so all responsibility can be delegated to it.
if (format.IsCodecInList(
internal_encoder_factory_->GetSupportedFormats())) {
return std::make_unique<SimulcastEncoderAdapter>(
env,
/*primary_factory=*/internal_encoder_factory_.get(),
/*fallback_factory=*/nullptr, format);
}
return nullptr;
}
std::vector<SdpVideoFormat> GetSupportedFormats() const override {
return internal_encoder_factory_->GetSupportedFormats();
}
CodecSupport QueryCodecSupport(
const SdpVideoFormat& format,
absl::optional<std::string> scalability_mode) const override {
return internal_encoder_factory_->QueryCodecSupport(format,
scalability_mode);
}
private:
const std::unique_ptr<VideoEncoderFactory> internal_encoder_factory_;
};
} // namespace
std::unique_ptr<VideoEncoderFactory> CreateBuiltinVideoEncoderFactory() {
return std::make_unique<BuiltinVideoEncoderFactory>();
}
} // namespace webrtc