talk/app/webrtc/objc/RTCVideoCapturer.mm

/*
 * libjingle
 * Copyright 2013 Google Inc.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 *  1. Redistributions of source code must retain the above copyright notice,
 *     this list of conditions and the following disclaimer.
 *  2. Redistributions in binary form must reproduce the above copyright notice,
 *     this list of conditions and the following disclaimer in the documentation
 *     and/or other materials provided with the distribution.
 *  3. The name of the author may not be used to endorse or promote products
 *     derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#if !defined(__has_feature) || !__has_feature(objc_arc)
#error "This file requires ARC support."
#endif

#import "RTCVideoCapturer+Internal.h"

#include "talk/media/base/videocapturer.h"
#include "talk/media/devices/devicemanager.h"

@implementation RTCVideoCapturer {
  rtc::scoped_ptr<cricket::VideoCapturer> _capturer;
}

+ (RTCVideoCapturer*)capturerWithDeviceName:(NSString*)deviceName {
  const std::string& device_name = std::string([deviceName UTF8String]);
  rtc::scoped_ptr<cricket::DeviceManagerInterface> device_manager(
      cricket::DeviceManagerFactory::Create());
  bool initialized = device_manager->Init();
  NSAssert(initialized, @"DeviceManager::Init() failed");
  cricket::Device device;
  if (!device_manager->GetVideoCaptureDevice(device_name, &device)) {
    LOG(LS_ERROR) << "GetVideoCaptureDevice failed";
    return 0;
  }
  rtc::scoped_ptr<cricket::VideoCapturer> capturer(
      device_manager->CreateVideoCapturer(device));
  RTCVideoCapturer* rtcCapturer =
      [[RTCVideoCapturer alloc] initWithCapturer:capturer.release()];
  return rtcCapturer;
}

@end

@implementation RTCVideoCapturer (Internal)

- (id)initWithCapturer:(cricket::VideoCapturer*)capturer {
  if ((self = [super init])) {
    _capturer.reset(capturer);
  }
  return self;
}

- (cricket::VideoCapturer*)takeNativeCapturer {
  return _capturer.release();
}

@end