CameraManager.m 5.6 KB

123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176
  1. //
  2. // CameraManager.m
  3. // PanoramicCameraSDK
  4. //
  5. // Created by 王昭威 on 2023/1/14.
  6. //
  7. #import "CameraManager.h"
  8. @interface CameraManager ()
  9. @property (nonatomic, assign) CGFloat backAspect;
  10. @property (nonatomic, assign) CGFloat frontAspect;
  11. @end
  12. @implementation CameraManager
  13. @synthesize front = _front;
  14. @synthesize back = _back;
  15. - (void)setResolutionFor:(AVCaptureDevicePosition)position with: (NSInteger)desiredHeight model:(SDKCaptureModeIndex)model{
  16. AVCaptureDevice* device = [self cameraWithPosition:position];
  17. if(device == nil){
  18. return;
  19. }
  20. NSArray *supportedFormats = device.formats;
  21. AVCaptureDeviceFormat *bestFormat;
  22. CGFloat aspect = 1;
  23. //分辨率
  24. CGFloat radio = 16.0/9.0;
  25. if(model == SDK_CAPTURE_MODE_SINGLE || model == SDK_CAPTURE_MODE_CONTINUOUS) {
  26. radio = 4.0/3.0;
  27. }
  28. for (AVCaptureDeviceFormat *format in supportedFormats) {
  29. CMVideoDimensions dimensions = CMVideoFormatDescriptionGetDimensions((CMVideoFormatDescriptionRef)[format formatDescription]);
  30. NSLog(@"~~~~~~: H: %d, W:%D, r:%f", dimensions.width, dimensions.height, (CGFloat)dimensions.width/(CGFloat)dimensions.height);
  31. if (((CGFloat)dimensions.width/(CGFloat)dimensions.height) == radio && dimensions.height == desiredHeight) {
  32. bestFormat = format;
  33. break;
  34. }
  35. }
  36. [device lockForConfiguration:nil];
  37. if (!bestFormat) {
  38. //未找到 匹配格式 查找固定匹配格式 (720 1080 2160)
  39. for (AVCaptureDeviceFormat *format in supportedFormats) {
  40. CMVideoDimensions dimensions = CMVideoFormatDescriptionGetDimensions((CMVideoFormatDescriptionRef)[format formatDescription]);
  41. CMVideoDimensions bestVideoDimensions = CMVideoFormatDescriptionGetDimensions((CMVideoFormatDescriptionRef)[bestFormat formatDescription]);
  42. if (((CGFloat)dimensions.width/(CGFloat)dimensions.height) == radio &&
  43. (dimensions.height == 720 || dimensions.height == 1080 || dimensions.height == 2160)) {
  44. // if (bestVideoDimensions.height <= dimensions.height) {
  45. // bestFormat = format;
  46. // }
  47. if (dimensions.height == 1080) {
  48. bestFormat = format;
  49. }
  50. }
  51. }
  52. }
  53. if (!bestFormat) {
  54. //未找到 固定格式 (720 1080 2160) 查找最佳格式(目标格式最近的分辨率)
  55. for (AVCaptureDeviceFormat *format in supportedFormats) {
  56. CMVideoDimensions dimensions = CMVideoFormatDescriptionGetDimensions((CMVideoFormatDescriptionRef)[format formatDescription]);
  57. CMVideoDimensions bestVideoDimensions = CMVideoFormatDescriptionGetDimensions((CMVideoFormatDescriptionRef)[bestFormat formatDescription]);
  58. if (((CGFloat)dimensions.width/(CGFloat)dimensions.height) == radio && dimensions.height <= desiredHeight ) {
  59. if (bestVideoDimensions.height <= dimensions.height) {
  60. bestFormat = format;
  61. }
  62. }
  63. }
  64. }
  65. if(bestFormat) {
  66. [device setActiveFormat:bestFormat];
  67. }
  68. [device setActiveVideoMaxFrameDuration:CMTimeMake(1, 10)];
  69. [device setActiveVideoMinFrameDuration:CMTimeMake(1, 10)];
  70. [device unlockForConfiguration];
  71. if(device.position == AVCaptureDevicePositionFront){
  72. self.frontAspect = aspect;
  73. }
  74. else if(device.position == AVCaptureDevicePositionBack){
  75. self.backAspect = aspect;
  76. }
  77. }
  78. - (AVCaptureDevice *)cameraWithPosition:(AVCaptureDevicePosition)position
  79. {
  80. NSArray *devices = nil;
  81. if(@available(iOS 10, *)){
  82. AVCaptureDeviceDiscoverySession *captureDeviceDiscoverySession = [AVCaptureDeviceDiscoverySession discoverySessionWithDeviceTypes:@[AVCaptureDeviceTypeBuiltInWideAngleCamera]
  83. mediaType:AVMediaTypeVideo
  84. position:position];
  85. devices = [captureDeviceDiscoverySession devices];
  86. }
  87. else if(@available(iOS 4, *)){
  88. devices = [AVCaptureDevice devicesWithMediaType:AVMediaTypeVideo];
  89. }
  90. if(devices == nil){
  91. return nil;
  92. }
  93. for (AVCaptureDevice *device in devices)
  94. {
  95. if ([device position] == position)
  96. return device;
  97. }
  98. return nil;
  99. }
  100. + (instancetype)shared{
  101. static dispatch_once_t token;
  102. static CameraManager* instance = nil;
  103. dispatch_once(&token, ^{
  104. instance = [[self alloc] init];
  105. });
  106. return instance;
  107. }
  108. - (instancetype)init{
  109. self = [super init];
  110. if(self){
  111. _back = [self cameraWithPosition:AVCaptureDevicePositionBack];
  112. _front = [self cameraWithPosition:AVCaptureDevicePositionFront];
  113. _frontAspect = 1;
  114. _backAspect = 1;
  115. }
  116. return self;
  117. }
  118. - (void)focusOn:(CGPoint)point{
  119. if (self.back == nil) {
  120. return;
  121. }
  122. [self focusOn:point device:self.back];
  123. }
  124. - (void)focusOn:(CGPoint)point device:(AVCaptureDevice *)device{
  125. NSError* error;
  126. [device lockForConfiguration:&error];
  127. if(error != nil){
  128. return;
  129. }
  130. if ([device isFocusModeSupported:AVCaptureFocusModeContinuousAutoFocus]){
  131. [device setFocusPointOfInterest: point];
  132. device.focusMode = AVCaptureFocusModeContinuousAutoFocus;
  133. }
  134. if ([device isExposureModeSupported:AVCaptureExposureModeContinuousAutoExposure]) {
  135. [device setExposurePointOfInterest:point];
  136. device.exposureMode = AVCaptureExposureModeContinuousAutoExposure;
  137. }
  138. [device unlockForConfiguration];
  139. }
  140. @end