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/*
* 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
#import <AVFoundation/AVFoundation.h>
#import "device_info_objc.h"
@implementation DeviceInfoIosObjC
- (id)init {
self = [super init];
if (nil != self) {
_lock = [[NSLock alloc] init];
}
return self;
}
- (void)dealloc {
}
- (void)registerOwner:(webrtc::VideoCaptureModule::DeviceInfo*)owner {
[_lock lock];
if (!_owner && owner) {
[self configureObservers];
} else if (_owner && !owner) {
NSNotificationCenter* notificationCenter =
[NSNotificationCenter defaultCenter];
for (id observer in _observers) {
[notificationCenter removeObserver:observer];
}
_observers = nil;
}
_owner = owner;
[_lock unlock];
}
+ (int)captureDeviceCount {
int cnt = 0;
@try {
for (AVCaptureDevice* device in
[AVCaptureDevice devicesWithMediaType:AVMediaTypeVideo]) {
if ([device isSuspended]) {
continue;
}
cnt++;
}
} @catch (NSException* exception) {
cnt = 0;
}
return cnt;
}
+ (AVCaptureDevice*)captureDeviceForIndex:(int)index {
int cnt = 0;
@try {
for (AVCaptureDevice* device in
[AVCaptureDevice devicesWithMediaType:AVMediaTypeVideo]) {
if ([device isSuspended]) {
continue;
}
if (cnt == index) {
return device;
}
cnt++;
}
} @catch (NSException* exception) {
cnt = 0;
}
return nil;
}
+ (AVCaptureDevice*)captureDeviceForUniqueId:(NSString*)uniqueId {
for (AVCaptureDevice* device in
[AVCaptureDevice devicesWithMediaType:AVMediaTypeVideo]) {
if ([device isSuspended]) {
continue;
}
if ([uniqueId isEqual:device.uniqueID]) {
return device;
}
}
return nil;
}
+ (NSString*)deviceNameForIndex:(int)index {
return [DeviceInfoIosObjC captureDeviceForIndex:index].localizedName;
}
+ (NSString*)deviceUniqueIdForIndex:(int)index {
return [DeviceInfoIosObjC captureDeviceForIndex:index].uniqueID;
}
+ (NSString*)deviceNameForUniqueId:(NSString*)uniqueId {
return [[AVCaptureDevice deviceWithUniqueID:uniqueId] localizedName];
}
+ (webrtc::VideoCaptureCapability)capabilityForPreset:(NSString*)preset {
webrtc::VideoCaptureCapability capability;
// TODO(tkchin): Maybe query AVCaptureDevice for supported formats, and
// then get the dimensions / frame rate from each supported format
if ([preset isEqualToString:AVCaptureSessionPreset352x288]) {
capability.width = 352;
capability.height = 288;
capability.maxFPS = 30;
capability.videoType = webrtc::VideoType::kNV12;
capability.interlaced = false;
} else if ([preset isEqualToString:AVCaptureSessionPreset640x480]) {
capability.width = 640;
capability.height = 480;
capability.maxFPS = 30;
capability.videoType = webrtc::VideoType::kNV12;
capability.interlaced = false;
} else if ([preset isEqualToString:AVCaptureSessionPreset1280x720]) {
capability.width = 1280;
capability.height = 720;
capability.maxFPS = 30;
capability.videoType = webrtc::VideoType::kNV12;
capability.interlaced = false;
}
return capability;
}
- (void)configureObservers {
// register device connected / disconnected event
NSNotificationCenter* notificationCenter =
[NSNotificationCenter defaultCenter];
id deviceWasConnectedObserver = [notificationCenter
addObserverForName:AVCaptureDeviceWasConnectedNotification
object:nil
queue:[NSOperationQueue mainQueue]
usingBlock:^(NSNotification* note) {
[_lock lock];
AVCaptureDevice* device = [note object];
BOOL isVideoDevice = [device hasMediaType:AVMediaTypeVideo];
if (isVideoDevice && _owner) _owner->DeviceChange();
[_lock unlock];
}];
id deviceWasDisconnectedObserver = [notificationCenter
addObserverForName:AVCaptureDeviceWasDisconnectedNotification
object:nil
queue:[NSOperationQueue mainQueue]
usingBlock:^(NSNotification* note) {
[_lock lock];
AVCaptureDevice* device = [note object];
BOOL isVideoDevice = [device hasMediaType:AVMediaTypeVideo];
if (isVideoDevice && _owner) _owner->DeviceChange();
[_lock unlock];
}];
_observers =
[[NSArray alloc] initWithObjects:deviceWasConnectedObserver,
deviceWasDisconnectedObserver, nil];
}
@end