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/*
* Copyright (c) 2016 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 MEDIA_ENGINE_VIDEODECODERSOFTWAREFALLBACKWRAPPER_H_
#define MEDIA_ENGINE_VIDEODECODERSOFTWAREFALLBACKWRAPPER_H_
#include <memory>
#include <string>
#include "api/video_codecs/video_decoder.h"
namespace webrtc {
// Class used to wrap external VideoDecoders to provide a fallback option on
// software decoding when a hardware decoder fails to decode a stream due to
// hardware restrictions, such as max resolution.
class VideoDecoderSoftwareFallbackWrapper : public VideoDecoder {
public:
VideoDecoderSoftwareFallbackWrapper(
std::unique_ptr<VideoDecoder> sw_fallback_decoder,
std::unique_ptr<VideoDecoder> hw_decoder);
~VideoDecoderSoftwareFallbackWrapper() override;
int32_t InitDecode(const VideoCodec* codec_settings,
int32_t number_of_cores) override;
int32_t Decode(const EncodedImage& input_image,
bool missing_frames,
const CodecSpecificInfo* codec_specific_info,
int64_t render_time_ms) override;
int32_t RegisterDecodeCompleteCallback(
DecodedImageCallback* callback) override;
int32_t Release() override;
bool PrefersLateDecoding() const override;
const char* ImplementationName() const override;
private:
bool InitFallbackDecoder();
int32_t InitHwDecoder();
VideoDecoder& active_decoder() const;
// Determines if we are trying to use the HW or SW decoder.
enum class DecoderType {
kNone,
kHardware,
kFallback,
} decoder_type_;
std::unique_ptr<VideoDecoder> hw_decoder_;
VideoCodec codec_settings_;
int32_t number_of_cores_;
const std::unique_ptr<VideoDecoder> fallback_decoder_;
const std::string fallback_implementation_name_;
DecodedImageCallback* callback_;
};
} // namespace webrtc
#endif // MEDIA_ENGINE_VIDEODECODERSOFTWAREFALLBACKWRAPPER_H_
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