blob: 31d84601946df7ad093d658a0b7a85d8196dc535 [file] [log] [blame]
* Copyright (c) 2012 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 <string>
#include "api/sequence_checker.h"
#include "api/units/time_delta.h"
#include "api/video_codecs/video_decoder.h"
#include "modules/video_coding/encoded_frame.h"
#include "modules/video_coding/include/video_codec_interface.h"
#include "modules/video_coding/timestamp_map.h"
#include "modules/video_coding/timing.h"
#include "rtc_base/experiments/field_trial_parser.h"
#include "rtc_base/synchronization/mutex.h"
namespace webrtc {
class VCMReceiveCallback;
enum { kDecoderFrameMemoryLength = 10 };
class VCMDecodedFrameCallback : public DecodedImageCallback {
VCMDecodedFrameCallback(VCMTiming* timing, Clock* clock);
~VCMDecodedFrameCallback() override;
void SetUserReceiveCallback(VCMReceiveCallback* receiveCallback);
VCMReceiveCallback* UserReceiveCallback();
int32_t Decoded(VideoFrame& decodedImage) override;
int32_t Decoded(VideoFrame& decodedImage, int64_t decode_time_ms) override;
void Decoded(VideoFrame& decodedImage,
absl::optional<int32_t> decode_time_ms,
absl::optional<uint8_t> qp) override;
void OnDecoderImplementationName(const char* implementation_name);
void Map(uint32_t timestamp, const VCMFrameInformation& frameInfo);
void ClearTimestampMap();
SequenceChecker construction_thread_;
// Protect `_timestampMap`.
Clock* const _clock;
// This callback must be set before the decoder thread starts running
// and must only be unset when external threads (e.g decoder thread)
// have been stopped. Due to that, the variable should regarded as const
// while there are more than one threads involved, it must be set
// from the same thread, and therfore a lock is not required to access it.
VCMReceiveCallback* _receiveCallback = nullptr;
VCMTiming* _timing;
Mutex lock_;
VCMTimestampMap _timestampMap RTC_GUARDED_BY(lock_);
int64_t ntp_offset_;
// Set by the field trial WebRTC-SlowDownDecoder to simulate a slow decoder.
FieldTrialOptional<TimeDelta> _extra_decode_time;
// Set by the field trial WebRTC-LowLatencyRenderer. The parameter `enabled`
// determines if the low-latency renderer algorithm should be used for the
// case min playout delay=0 and max playout delay>0.
FieldTrialParameter<bool> low_latency_renderer_enabled_;
// Set by the field trial WebRTC-LowLatencyRenderer. The parameter
// `include_predecode_buffer` determines if the predecode buffer should be
// taken into account when calculating maximum number of frames in composition
// queue.
FieldTrialParameter<bool> low_latency_renderer_include_predecode_buffer_;
class VCMGenericDecoder {
explicit VCMGenericDecoder(VideoDecoder* decoder);
* Initialize the decoder with the information from the `settings`
bool Configure(const VideoDecoder::Settings& settings);
* Decode to a raw I420 frame,
* inputVideoBuffer reference to encoded video frame
int32_t Decode(const VCMEncodedFrame& inputFrame, Timestamp now);
* Set decode callback. Deregistering while decoding is illegal.
int32_t RegisterDecodeCompleteCallback(VCMDecodedFrameCallback* callback);
bool IsSameDecoder(VideoDecoder* decoder) const {
return decoder_ == decoder;
VCMDecodedFrameCallback* _callback = nullptr;
VideoDecoder* const decoder_;
VideoContentType _last_keyframe_content_type;
VideoDecoder::DecoderInfo decoder_info_;
} // namespace webrtc