52fec7d3e9
This RaceChecker is intended to be used on API thread only when we are not capturing, however, since StartCapture() can be called while already capturing, we have to avoid using it to guard members that do not meet this expectations. Use API checker for _captureStarted instead and move the capture race checker down where we can be sure that capturing is not happening. Bug: webrtc:15181 Change-Id: I52f74b893f2c36c3ce0facd053b003fa497101b0 Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/338040 Reviewed-by: Ilya Nikolaevskiy <ilnik@webrtc.org> Commit-Queue: Jan Grulich <grulja@gmail.com> Cr-Commit-Position: refs/heads/main@{#41714}
65 lines
2.2 KiB
C++
65 lines
2.2 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_CAPTURE_LINUX_VIDEO_CAPTURE_V4L2_H_
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#define MODULES_VIDEO_CAPTURE_LINUX_VIDEO_CAPTURE_V4L2_H_
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#include <stddef.h>
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#include <stdint.h>
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#include <memory>
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#include "modules/video_capture/video_capture_defines.h"
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#include "modules/video_capture/video_capture_impl.h"
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#include "rtc_base/platform_thread.h"
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#include "rtc_base/synchronization/mutex.h"
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namespace webrtc {
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namespace videocapturemodule {
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class VideoCaptureModuleV4L2 : public VideoCaptureImpl {
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public:
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VideoCaptureModuleV4L2();
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~VideoCaptureModuleV4L2() override;
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int32_t Init(const char* deviceUniqueId);
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int32_t StartCapture(const VideoCaptureCapability& capability) override;
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int32_t StopCapture() override;
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bool CaptureStarted() override;
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int32_t CaptureSettings(VideoCaptureCapability& settings) override;
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private:
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enum { kNoOfV4L2Bufffers = 4 };
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static void CaptureThread(void*);
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bool CaptureProcess();
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bool AllocateVideoBuffers() RTC_EXCLUSIVE_LOCKS_REQUIRED(capture_lock_);
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bool DeAllocateVideoBuffers() RTC_EXCLUSIVE_LOCKS_REQUIRED(capture_lock_);
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rtc::PlatformThread _captureThread RTC_GUARDED_BY(api_checker_);
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Mutex capture_lock_ RTC_ACQUIRED_BEFORE(api_lock_);
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bool quit_ RTC_GUARDED_BY(capture_lock_);
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int32_t _deviceId RTC_GUARDED_BY(api_checker_);
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int32_t _deviceFd RTC_GUARDED_BY(capture_checker_);
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int32_t _buffersAllocatedByDevice RTC_GUARDED_BY(capture_lock_);
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VideoCaptureCapability configured_capability_
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RTC_GUARDED_BY(capture_checker_);
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bool _streaming RTC_GUARDED_BY(capture_checker_);
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bool _captureStarted RTC_GUARDED_BY(api_checker_);
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struct Buffer {
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void* start;
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size_t length;
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};
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Buffer* _pool RTC_GUARDED_BY(capture_lock_);
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};
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} // namespace videocapturemodule
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} // namespace webrtc
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#endif // MODULES_VIDEO_CAPTURE_LINUX_VIDEO_CAPTURE_V4L2_H_
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