99f52f83e4
In practice, we never want to go back to HW decoding after deciding to start decoding with SW codecs. This allows simplifying the code in the fallback wrapper and makes it easier to implement HW codecs. HW decoder is also now released when software fallback is activated because it will not be used again. This could free up some resources. Bug: b/73498933 Change-Id: Ibea4e32fce0c605179b649c8ac2744031799f3ee Reviewed-on: https://webrtc-review.googlesource.com/55263 Commit-Queue: Sami Kalliomäki <sakal@webrtc.org> Reviewed-by: Magnus Jedvert <magjed@webrtc.org> Reviewed-by: Alex Glaznev <glaznev@webrtc.org> Cr-Commit-Position: refs/heads/master@{#22168}
71 lines
2.2 KiB
C++
71 lines
2.2 KiB
C++
/*
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* Copyright (c) 2016 The WebRTC project authors. All Rights Reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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#ifndef MEDIA_ENGINE_VIDEODECODERSOFTWAREFALLBACKWRAPPER_H_
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#define MEDIA_ENGINE_VIDEODECODERSOFTWAREFALLBACKWRAPPER_H_
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#include <memory>
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#include <string>
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#include "api/video_codecs/video_decoder.h"
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namespace webrtc {
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// Class used to wrap external VideoDecoders to provide a fallback option on
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// software decoding when a hardware decoder fails to decode a stream due to
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// hardware restrictions, such as max resolution.
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class VideoDecoderSoftwareFallbackWrapper : public VideoDecoder {
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public:
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VideoDecoderSoftwareFallbackWrapper(
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std::unique_ptr<VideoDecoder> sw_fallback_decoder,
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std::unique_ptr<VideoDecoder> hw_decoder);
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int32_t InitDecode(const VideoCodec* codec_settings,
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int32_t number_of_cores) override;
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int32_t Decode(const EncodedImage& input_image,
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bool missing_frames,
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const RTPFragmentationHeader* fragmentation,
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const CodecSpecificInfo* codec_specific_info,
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int64_t render_time_ms) override;
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int32_t RegisterDecodeCompleteCallback(
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DecodedImageCallback* callback) override;
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int32_t Release() override;
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bool PrefersLateDecoding() const override;
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const char* ImplementationName() const override;
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private:
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bool InitFallbackDecoder();
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int32_t InitHwDecoder();
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VideoDecoder& active_decoder() const;
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// Determines if we are trying to use the HW or SW decoder.
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enum class DecoderType {
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kNone,
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kHardware,
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kFallback,
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} decoder_type_;
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std::unique_ptr<VideoDecoder> hw_decoder_;
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VideoCodec codec_settings_;
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int32_t number_of_cores_;
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const std::unique_ptr<VideoDecoder> fallback_decoder_;
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const std::string fallback_implementation_name_;
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DecodedImageCallback* callback_;
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};
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} // namespace webrtc
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#endif // MEDIA_ENGINE_VIDEODECODERSOFTWAREFALLBACKWRAPPER_H_
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