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16359f65c4
Before this CL, WebRTC created a decoder for each negotiated codec profile. This quickly consumed all available HW decoder resources on some platforms. This CL adds a field trial, WebRTC-PreStreamDecoders, that makes it possible to set how many decoders that should be created up front, from 0 to ALL. If the field trial is set to 1, we only create a decoder for the preferred codec. The other decoders are only created when they are needed (i.e., if we receive the corresponding payload type). Bug: webrtc:12462 Change-Id: I087571b540f6796d32d34923f9c7f8e89b0959c5 Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/208284 Reviewed-by: Ilya Nikolaevskiy <ilnik@webrtc.org> Commit-Queue: Johannes Kron <kron@webrtc.org> Cr-Commit-Position: refs/heads/master@{#33300}
76 lines
2.8 KiB
C++
76 lines
2.8 KiB
C++
/*
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* Copyright (c) 2019 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_VIDEO_RECEIVER2_H_
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#define MODULES_VIDEO_CODING_VIDEO_RECEIVER2_H_
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#include "api/sequence_checker.h"
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#include "modules/video_coding/decoder_database.h"
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#include "modules/video_coding/encoded_frame.h"
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#include "modules/video_coding/generic_decoder.h"
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#include "modules/video_coding/timing.h"
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#include "system_wrappers/include/clock.h"
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namespace webrtc {
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// This class is a copy of vcm::VideoReceiver, trimmed down to what's used by
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// VideoReceive stream, with the aim to incrementally trim it down further and
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// ultimately delete it. It's difficult to do this incrementally with the
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// original VideoReceiver class, since it is used by the legacy
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// VideoCodingModule api.
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class VideoReceiver2 {
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public:
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VideoReceiver2(Clock* clock, VCMTiming* timing);
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~VideoReceiver2();
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int32_t RegisterReceiveCodec(uint8_t payload_type,
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const VideoCodec* receiveCodec,
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int32_t numberOfCores);
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void RegisterExternalDecoder(VideoDecoder* externalDecoder,
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uint8_t payloadType);
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bool IsExternalDecoderRegistered(uint8_t payloadType) const;
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int32_t RegisterReceiveCallback(VCMReceiveCallback* receiveCallback);
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int32_t Decode(const webrtc::VCMEncodedFrame* frame);
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// Notification methods that are used to check our internal state and validate
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// threading assumptions. These are called by VideoReceiveStream.
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// See |IsDecoderThreadRunning()| for more details.
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void DecoderThreadStarting();
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void DecoderThreadStopped();
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private:
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// Used for DCHECKing thread correctness.
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// In build where DCHECKs are enabled, will return false before
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// DecoderThreadStarting is called, then true until DecoderThreadStopped
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// is called.
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// In builds where DCHECKs aren't enabled, it will return true.
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bool IsDecoderThreadRunning();
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SequenceChecker construction_sequence_checker_;
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SequenceChecker decoder_sequence_checker_;
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Clock* const clock_;
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VCMTiming* timing_;
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VCMDecodedFrameCallback decodedFrameCallback_;
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// Callbacks are set before the decoder thread starts.
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// Once the decoder thread has been started, usage of |_codecDataBase| moves
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// over to the decoder thread.
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VCMDecoderDataBase codecDataBase_;
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#if RTC_DCHECK_IS_ON
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bool decoder_thread_is_running_ = false;
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#endif
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};
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} // namespace webrtc
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#endif // MODULES_VIDEO_CODING_VIDEO_RECEIVER2_H_
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