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      1 /*
      2  *  Copyright (c) 2013 The WebRTC project authors. All Rights Reserved.
      3  *
      4  *  Use of this source code is governed by a BSD-style license
      5  *  that can be found in the LICENSE file in the root of the source
      6  *  tree. An additional intellectual property rights grant can be found
      7  *  in the file PATENTS.  All contributing project authors may
      8  *  be found in the AUTHORS file in the root of the source tree.
      9  */
     10 
     11 #if !defined(__has_feature) || !__has_feature(objc_arc)
     12 #error "This file requires ARC support."
     13 #endif
     14 
     15 #include "webrtc/modules/video_capture/ios/device_info_ios_objc.h"
     16 #include "webrtc/modules/video_capture/ios/rtc_video_capture_ios_objc.h"
     17 #include "webrtc/system_wrappers/include/ref_count.h"
     18 #include "webrtc/system_wrappers/include/trace.h"
     19 
     20 using namespace webrtc;
     21 using namespace videocapturemodule;
     22 
     23 VideoCaptureModule* VideoCaptureImpl::Create(const int32_t capture_id,
     24                                              const char* deviceUniqueIdUTF8) {
     25   return VideoCaptureIos::Create(capture_id, deviceUniqueIdUTF8);
     26 }
     27 
     28 VideoCaptureIos::VideoCaptureIos(const int32_t capture_id)
     29     : VideoCaptureImpl(capture_id), is_capturing_(false), id_(capture_id) {
     30   capability_.width = kDefaultWidth;
     31   capability_.height = kDefaultHeight;
     32   capability_.maxFPS = kDefaultFrameRate;
     33   capture_device_ = nil;
     34 }
     35 
     36 VideoCaptureIos::~VideoCaptureIos() {
     37   if (is_capturing_) {
     38     [capture_device_ stopCapture];
     39     capture_device_ = nil;
     40   }
     41 }
     42 
     43 VideoCaptureModule* VideoCaptureIos::Create(const int32_t capture_id,
     44                                             const char* deviceUniqueIdUTF8) {
     45   if (!deviceUniqueIdUTF8[0]) {
     46     return NULL;
     47   }
     48 
     49   RefCountImpl<VideoCaptureIos>* capture_module =
     50       new RefCountImpl<VideoCaptureIos>(capture_id);
     51 
     52   const int32_t name_length = strlen(deviceUniqueIdUTF8);
     53   if (name_length > kVideoCaptureUniqueNameLength)
     54     return NULL;
     55 
     56   capture_module->_deviceUniqueId = new char[name_length + 1];
     57   strncpy(capture_module->_deviceUniqueId, deviceUniqueIdUTF8, name_length + 1);
     58   capture_module->_deviceUniqueId[name_length] = '\0';
     59 
     60   capture_module->capture_device_ =
     61       [[RTCVideoCaptureIosObjC alloc] initWithOwner:capture_module
     62                                           captureId:capture_module->id_];
     63   if (!capture_module->capture_device_) {
     64     return NULL;
     65   }
     66 
     67   if (![capture_module->capture_device_ setCaptureDeviceByUniqueId:[
     68               [NSString alloc] initWithCString:deviceUniqueIdUTF8
     69                                       encoding:NSUTF8StringEncoding]]) {
     70     return NULL;
     71   }
     72   return capture_module;
     73 }
     74 
     75 int32_t VideoCaptureIos::StartCapture(
     76     const VideoCaptureCapability& capability) {
     77   capability_ = capability;
     78 
     79   if (![capture_device_ startCaptureWithCapability:capability]) {
     80     return -1;
     81   }
     82 
     83   is_capturing_ = true;
     84 
     85   return 0;
     86 }
     87 
     88 int32_t VideoCaptureIos::StopCapture() {
     89   if (![capture_device_ stopCapture]) {
     90     return -1;
     91   }
     92 
     93   is_capturing_ = false;
     94   return 0;
     95 }
     96 
     97 bool VideoCaptureIos::CaptureStarted() { return is_capturing_; }
     98 
     99 int32_t VideoCaptureIos::CaptureSettings(VideoCaptureCapability& settings) {
    100   settings = capability_;
    101   settings.rawType = kVideoNV12;
    102   return 0;
    103 }
    104