Revert of Unify the macOS and iOS capturer implementations

webrtc/modules/video_capture/ios/device_info_ios.mm

+/*
+ *  Copyright (c) 2013 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.
+ */
+
+#if !defined(__has_feature) || !__has_feature(objc_arc)
+#error "This file requires ARC support."
+#endif
+
+#include <AVFoundation/AVFoundation.h>
+
+#include <string>
+
+#include "webrtc/modules/video_capture/ios/device_info_ios.h"
+#include "webrtc/modules/video_capture/ios/device_info_ios_objc.h"
+#include "webrtc/modules/video_capture/video_capture_impl.h"
+#include "webrtc/system_wrappers/include/trace.h"
+
+using namespace webrtc;
+using namespace videocapturemodule;
+
+static NSArray *camera_presets = @[AVCaptureSessionPreset352x288,
+                                   AVCaptureSessionPreset640x480,
+                                   AVCaptureSessionPreset1280x720,
+                                   AVCaptureSessionPreset1920x1080];
+
+
+#define IOS_UNSUPPORTED()                                  \
+  WEBRTC_TRACE(kTraceError,                                \
+               kTraceVideoCapture,                         \
+               _id,                                        \
+               "%s is not supported on the iOS platform.", \
+               __FUNCTION__);                              \
+  return -1;
+
+VideoCaptureModule::DeviceInfo* VideoCaptureImpl::CreateDeviceInfo(
+    const int32_t device_id) {
+  return new DeviceInfoIos(device_id);
+}
+
+DeviceInfoIos::DeviceInfoIos(const int32_t device_id)
+    : DeviceInfoImpl(device_id) {
+  this->Init();
+}
+
+DeviceInfoIos::~DeviceInfoIos() {}
+
+int32_t DeviceInfoIos::Init() {
+  // Fill in all device capabilities.
+
+  int deviceCount = [DeviceInfoIosObjC captureDeviceCount];
+
+  for (int i = 0; i < deviceCount; i++) {
+    AVCaptureDevice *avDevice = [DeviceInfoIosObjC captureDeviceForIndex:i];
+    VideoCaptureCapabilities capabilityVector;
+
+    for (NSString *preset in camera_presets) {
+      BOOL support = [avDevice supportsAVCaptureSessionPreset:preset];
+      if (support) {
+        VideoCaptureCapability capability =
+            [DeviceInfoIosObjC capabilityForPreset:preset];
+        capabilityVector.push_back(capability);
+      }
+    }
+
+    char deviceNameUTF8[256];
+    char deviceId[256];
+    this->GetDeviceName(i, deviceNameUTF8, 256, deviceId, 256);
+    std::string deviceIdCopy(deviceId);
+    std::pair<std::string, VideoCaptureCapabilities> mapPair =
+        std::pair<std::string, VideoCaptureCapabilities>
+            (deviceIdCopy, capabilityVector);
+    _capabilitiesMap.insert(mapPair);
+  }
+
+  return 0;
+}
+
+uint32_t DeviceInfoIos::NumberOfDevices() {
+  return [DeviceInfoIosObjC captureDeviceCount];
+}
+
+int32_t DeviceInfoIos::GetDeviceName(uint32_t deviceNumber,
+                                     char* deviceNameUTF8,
+                                     uint32_t deviceNameUTF8Length,
+                                     char* deviceUniqueIdUTF8,
+                                     uint32_t deviceUniqueIdUTF8Length,
+                                     char* productUniqueIdUTF8,
+                                     uint32_t productUniqueIdUTF8Length) {
+  NSString* deviceName = [DeviceInfoIosObjC deviceNameForIndex:deviceNumber];
+
+  NSString* deviceUniqueId =
+      [DeviceInfoIosObjC deviceUniqueIdForIndex:deviceNumber];
+
+  strncpy(deviceNameUTF8, [deviceName UTF8String], deviceNameUTF8Length);
+  deviceNameUTF8[deviceNameUTF8Length - 1] = '\0';
+
+  strncpy(deviceUniqueIdUTF8,
+          [deviceUniqueId UTF8String],
+          deviceUniqueIdUTF8Length);
+  deviceUniqueIdUTF8[deviceUniqueIdUTF8Length - 1] = '\0';
+
+  if (productUniqueIdUTF8) {
+    productUniqueIdUTF8[0] = '\0';
+  }
+
+  return 0;
+}
+
+int32_t DeviceInfoIos::NumberOfCapabilities(const char* deviceUniqueIdUTF8) {
+  int32_t numberOfCapabilities = 0;
+  std::string deviceUniqueId(deviceUniqueIdUTF8);
+  std::map<std::string, VideoCaptureCapabilities>::iterator it =
+      _capabilitiesMap.find(deviceUniqueId);
+
+  if (it != _capabilitiesMap.end()) {
+    numberOfCapabilities = it->second.size();
+  }
+  return numberOfCapabilities;
+}
+
+int32_t DeviceInfoIos::GetCapability(const char* deviceUniqueIdUTF8,
+                                     const uint32_t deviceCapabilityNumber,
+                                     VideoCaptureCapability& capability) {
+  std::string deviceUniqueId(deviceUniqueIdUTF8);
+  std::map<std::string, VideoCaptureCapabilities>::iterator it =
+      _capabilitiesMap.find(deviceUniqueId);
+
+  if (it != _capabilitiesMap.end()) {
+    VideoCaptureCapabilities deviceCapabilities = it->second;
+
+    if (deviceCapabilityNumber < deviceCapabilities.size()) {
+      VideoCaptureCapability cap;
+      cap = deviceCapabilities[deviceCapabilityNumber];
+      capability = cap;
+      return 0;
+    }
+  }
+
+  return -1;
+}
+
+int32_t DeviceInfoIos::DisplayCaptureSettingsDialogBox(
+    const char* deviceUniqueIdUTF8,
+    const char* dialogTitleUTF8,
+    void* parentWindow,
+    uint32_t positionX,
+    uint32_t positionY) {
+  IOS_UNSUPPORTED();
+}
+
+int32_t DeviceInfoIos::GetOrientation(const char* deviceUniqueIdUTF8,
+                                      VideoRotation& orientation) {
+  if (strcmp(deviceUniqueIdUTF8, "Front Camera") == 0) {
+    orientation = kVideoRotation_0;
+  } else {
+    orientation = kVideoRotation_90;
+  }
+  return orientation;
+}
+
+int32_t DeviceInfoIos::CreateCapabilityMap(const char* deviceUniqueIdUTF8) {
+  std::string deviceName(deviceUniqueIdUTF8);
+  std::map<std::string, std::vector<VideoCaptureCapability>>::iterator it =
+      _capabilitiesMap.find(deviceName);
+  VideoCaptureCapabilities deviceCapabilities;
+  if (it != _capabilitiesMap.end()) {
+    _captureCapabilities = it->second;
+    return 0;
+  }
+
+  return -1;
+}