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/*
* Copyright (c) 2019 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 MODULES_VIDEO_CODING_VIDEO_RECEIVER2_H_
#define MODULES_VIDEO_CODING_VIDEO_RECEIVER2_H_
#include "api/field_trials_view.h"
#include "api/sequence_checker.h"
#include "api/video_codecs/video_decoder.h"
#include "modules/video_coding/decoder_database.h"
#include "modules/video_coding/encoded_frame.h"
#include "modules/video_coding/generic_decoder.h"
#include "modules/video_coding/timing/timing.h"
#include "system_wrappers/include/clock.h"
namespace webrtc {
// This class is a copy of vcm::VideoReceiver, trimmed down to what's used by
// VideoReceive stream, with the aim to incrementally trim it down further and
// ultimately delete it. It's difficult to do this incrementally with the
// original VideoReceiver class, since it is used by the legacy
// VideoCodingModule api.
class VideoReceiver2 {
public:
VideoReceiver2(Clock* clock,
VCMTiming* timing,
const FieldTrialsView& field_trials);
~VideoReceiver2();
void RegisterReceiveCodec(uint8_t payload_type,
const VideoDecoder::Settings& decoder_settings);
void RegisterExternalDecoder(VideoDecoder* externalDecoder,
uint8_t payloadType);
bool IsExternalDecoderRegistered(uint8_t payloadType) const;
int32_t RegisterReceiveCallback(VCMReceiveCallback* receiveCallback);
int32_t Decode(const webrtc::VCMEncodedFrame* frame);
// Notification methods that are used to check our internal state and validate
// threading assumptions. These are called by VideoReceiveStreamInterface.
// See `IsDecoderThreadRunning()` for more details.
void DecoderThreadStarting();
void DecoderThreadStopped();
private:
// Used for DCHECKing thread correctness.
// In build where DCHECKs are enabled, will return false before
// DecoderThreadStarting is called, then true until DecoderThreadStopped
// is called.
// In builds where DCHECKs aren't enabled, it will return true.
bool IsDecoderThreadRunning();
SequenceChecker construction_sequence_checker_;
SequenceChecker decoder_sequence_checker_;
Clock* const clock_;
VCMTiming* timing_;
VCMDecodedFrameCallback decodedFrameCallback_;
// Callbacks are set before the decoder thread starts.
// Once the decoder thread has been started, usage of `_codecDataBase` moves
// over to the decoder thread.
VCMDecoderDataBase codecDataBase_;
#if RTC_DCHECK_IS_ON
bool decoder_thread_is_running_ = false;
#endif
};
} // namespace webrtc
#endif // MODULES_VIDEO_CODING_VIDEO_RECEIVER2_H_
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