122 lines
4.0 KiB
C++
122 lines
4.0 KiB
C++
/*
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* Copyright (c) 2012 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 MODULES_VIDEO_CODING_GENERIC_DECODER_H_
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#define MODULES_VIDEO_CODING_GENERIC_DECODER_H_
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#include <memory>
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#include <string>
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#include "api/units/time_delta.h"
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#include "modules/video_coding/encoded_frame.h"
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#include "modules/video_coding/include/video_codec_interface.h"
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#include "modules/video_coding/timestamp_map.h"
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#include "modules/video_coding/timing.h"
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#include "rtc_base/experiments/field_trial_parser.h"
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#include "rtc_base/synchronization/mutex.h"
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#include "rtc_base/thread_checker.h"
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namespace webrtc {
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class VCMReceiveCallback;
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enum { kDecoderFrameMemoryLength = 10 };
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struct VCMFrameInformation {
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int64_t renderTimeMs;
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absl::optional<Timestamp> decodeStart;
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void* userData;
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VideoRotation rotation;
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VideoContentType content_type;
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EncodedImage::Timing timing;
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int64_t ntp_time_ms;
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RtpPacketInfos packet_infos;
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// ColorSpace is not stored here, as it might be modified by decoders.
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};
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class VCMDecodedFrameCallback : public DecodedImageCallback {
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public:
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VCMDecodedFrameCallback(VCMTiming* timing, Clock* clock);
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~VCMDecodedFrameCallback() override;
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void SetUserReceiveCallback(VCMReceiveCallback* receiveCallback);
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VCMReceiveCallback* UserReceiveCallback();
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int32_t Decoded(VideoFrame& decodedImage) override;
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int32_t Decoded(VideoFrame& decodedImage, int64_t decode_time_ms) override;
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void Decoded(VideoFrame& decodedImage,
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absl::optional<int32_t> decode_time_ms,
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absl::optional<uint8_t> qp) override;
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void OnDecoderImplementationName(const char* implementation_name);
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void Map(uint32_t timestamp, VCMFrameInformation* frameInfo);
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int32_t Pop(uint32_t timestamp);
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private:
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rtc::ThreadChecker construction_thread_;
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// Protect |_timestampMap|.
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Clock* const _clock;
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// This callback must be set before the decoder thread starts running
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// and must only be unset when external threads (e.g decoder thread)
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// have been stopped. Due to that, the variable should regarded as const
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// while there are more than one threads involved, it must be set
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// from the same thread, and therfore a lock is not required to access it.
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VCMReceiveCallback* _receiveCallback = nullptr;
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VCMTiming* _timing;
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Mutex lock_;
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VCMTimestampMap _timestampMap RTC_GUARDED_BY(lock_);
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int64_t ntp_offset_;
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// Set by the field trial WebRTC-SlowDownDecoder to simulate a slow decoder.
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FieldTrialOptional<TimeDelta> _extra_decode_time;
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};
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class VCMGenericDecoder {
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public:
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explicit VCMGenericDecoder(std::unique_ptr<VideoDecoder> decoder);
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explicit VCMGenericDecoder(VideoDecoder* decoder, bool isExternal = false);
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~VCMGenericDecoder();
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/**
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* Initialize the decoder with the information from the VideoCodec
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*/
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int32_t InitDecode(const VideoCodec* settings, int32_t numberOfCores);
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/**
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* Decode to a raw I420 frame,
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*
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* inputVideoBuffer reference to encoded video frame
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*/
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int32_t Decode(const VCMEncodedFrame& inputFrame, Timestamp now);
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/**
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* Set decode callback. Deregistering while decoding is illegal.
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*/
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int32_t RegisterDecodeCompleteCallback(VCMDecodedFrameCallback* callback);
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bool PrefersLateDecoding() const;
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bool IsSameDecoder(VideoDecoder* decoder) const {
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return decoder_.get() == decoder;
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}
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private:
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VCMDecodedFrameCallback* _callback;
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VCMFrameInformation _frameInfos[kDecoderFrameMemoryLength];
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uint32_t _nextFrameInfoIdx;
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std::unique_ptr<VideoDecoder> decoder_;
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VideoCodecType _codecType;
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const bool _isExternal;
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VideoContentType _last_keyframe_content_type;
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std::string implementation_name_;
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};
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} // namespace webrtc
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#endif // MODULES_VIDEO_CODING_GENERIC_DECODER_H_
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