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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 <vector>
#include "absl/strings/match.h"
#include "api/video_codecs/sdp_video_format.h"
#include "api/video_codecs/video_encoder.h"
#include "media/base/codec.h"
#include "media/base/media_constants.h"
#include "media/engine/encoder_simulcast_proxy.h"
#include "media/engine/internal_encoder_factory.h"
#include "rtc_base/checks.h"
namespace webrtc {
namespace {
bool IsFormatSupported(const std::vector<SdpVideoFormat>& supported_formats,
const SdpVideoFormat& format) {
for (const SdpVideoFormat& supported_format : supported_formats) {
if (cricket::IsSameCodec(format.name, format.parameters,
supported_format.name,
supported_format.parameters)) {
return true;
}
}
return false;
}
// This class wraps the internal factory and adds simulcast.
class BuiltinVideoEncoderFactory : public VideoEncoderFactory {
public:
BuiltinVideoEncoderFactory()
: internal_encoder_factory_(new InternalEncoderFactory()) {}
VideoEncoderFactory::CodecInfo QueryVideoEncoder(
const SdpVideoFormat& format) const override {
// Format must be one of the internal formats.
RTC_DCHECK(IsFormatSupported(
internal_encoder_factory_->GetSupportedFormats(), format));
VideoEncoderFactory::CodecInfo info;
return info;
}
std::unique_ptr<VideoEncoder> CreateVideoEncoder(
const SdpVideoFormat& format) override {
// Try creating internal encoder.
std::unique_ptr<VideoEncoder> internal_encoder;
if (IsFormatSupported(internal_encoder_factory_->GetSupportedFormats(),
format)) {
internal_encoder = std::make_unique<EncoderSimulcastProxy>(
internal_encoder_factory_.get(), format);
}
return internal_encoder;
}
std::vector<SdpVideoFormat> GetSupportedFormats() const override {
return internal_encoder_factory_->GetSupportedFormats();
}
private:
const std::unique_ptr<VideoEncoderFactory> internal_encoder_factory_;
};
} // namespace
std::unique_ptr<VideoEncoderFactory> CreateBuiltinVideoEncoderFactory() {
return std::make_unique<BuiltinVideoEncoderFactory>();
}
} // namespace webrtc
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