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/*
* 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.
*/
#ifndef MODULES_VIDEO_CAPTURE_LINUX_VIDEO_CAPTURE_V4L2_H_
#define MODULES_VIDEO_CAPTURE_LINUX_VIDEO_CAPTURE_V4L2_H_
#include <stddef.h>
#include <stdint.h>
#include <memory>
#include "modules/video_capture/video_capture_defines.h"
#include "modules/video_capture/video_capture_impl.h"
#include "rtc_base/platform_thread.h"
#include "rtc_base/synchronization/mutex.h"
namespace webrtc {
namespace videocapturemodule {
class VideoCaptureModuleV4L2 : public VideoCaptureImpl {
public:
VideoCaptureModuleV4L2();
~VideoCaptureModuleV4L2() override;
int32_t Init(const char* deviceUniqueId);
int32_t StartCapture(const VideoCaptureCapability& capability) override;
int32_t StopCapture() override;
bool CaptureStarted() override;
int32_t CaptureSettings(VideoCaptureCapability& settings) override;
private:
enum { kNoOfV4L2Bufffers = 4 };
static void CaptureThread(void*);
bool CaptureProcess();
bool AllocateVideoBuffers() RTC_EXCLUSIVE_LOCKS_REQUIRED(capture_lock_);
bool DeAllocateVideoBuffers() RTC_EXCLUSIVE_LOCKS_REQUIRED(capture_lock_);
rtc::PlatformThread _captureThread RTC_GUARDED_BY(api_checker_);
Mutex capture_lock_ RTC_ACQUIRED_BEFORE(api_lock_);
bool quit_ RTC_GUARDED_BY(capture_lock_);
int32_t _deviceId RTC_GUARDED_BY(api_checker_);
int32_t _deviceFd RTC_GUARDED_BY(capture_checker_);
int32_t _buffersAllocatedByDevice RTC_GUARDED_BY(capture_lock_);
VideoCaptureCapability configured_capability_
RTC_GUARDED_BY(capture_checker_);
bool _streaming RTC_GUARDED_BY(capture_checker_);
bool _captureStarted RTC_GUARDED_BY(api_checker_);
struct Buffer {
void* start;
size_t length;
};
Buffer* _pool RTC_GUARDED_BY(capture_lock_);
};
} // namespace videocapturemodule
} // namespace webrtc
#endif // MODULES_VIDEO_CAPTURE_LINUX_VIDEO_CAPTURE_V4L2_H_
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