video_capture_pipewire.h

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/*

 *  Copyright (c) 2022 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_PIPEWIRE_H_

#define MODULES_VIDEO_CAPTURE_LINUX_VIDEO_CAPTURE_PIPEWIRE_H_

#include "modules/video_capture/linux/pipewire_session.h"

#include "modules/video_capture/video_capture_defines.h"

#include "modules/video_capture/video_capture_impl.h"

namespace webrtc {

namespace videocapturemodule {

class VideoCaptureModulePipeWire : public VideoCaptureImpl {

 public:

  explicit VideoCaptureModulePipeWire(VideoCaptureOptions* options);

  ~VideoCaptureModulePipeWire() 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;

  static VideoType PipeWireRawFormatToVideoType(uint32_t format);

  static uint32_t VideoTypeToPipeWireRawFormat(VideoType type);

 private:

  static void OnStreamParamChanged(void* data,

                                   uint32_t id,

                                   const struct spa_pod* format);

  static void OnStreamStateChanged(void* data,

                                   pw_stream_state old_state,

                                   pw_stream_state state,

                                   const char* error_message);

  static void OnStreamProcess(void* data);

  void OnFormatChanged(const struct spa_pod* format);

  void ProcessBuffers();

  const rtc::scoped_refptr<PipeWireSession> session_

      RTC_GUARDED_BY(api_checker_);

  bool initialized_ RTC_GUARDED_BY(api_checker_);

  bool started_ RTC_GUARDED_BY(api_lock_);

  int node_id_ RTC_GUARDED_BY(capture_checker_);

  VideoCaptureCapability configured_capability_

      RTC_GUARDED_BY(capture_checker_);

  struct pw_stream* stream_ RTC_GUARDED_BY(capture_checker_) = nullptr;

  struct spa_hook stream_listener_ RTC_GUARDED_BY(capture_checker_);

};

}  // namespace videocapturemodule

}  // namespace webrtc

#endif  // MODULES_VIDEO_CAPTURE_LINUX_VIDEO_CAPTURE_PIPEWIRE_H_