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//
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// CameraManager.m
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// Yoosee
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//
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// Created by guojunyi on 14-4-18.
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// Copyright (c) 2014年 guojunyi. All rights reserved.
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//
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#import "CameraManager.h"
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#import "Constants.h"
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#import "config.h"
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@interface CameraManager ()
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@end
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@implementation CameraManager
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+ (id)sharedManager
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{
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static CameraManager *manager = nil;
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@synchronized([self class]){
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if(manager==nil){
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DLog(@"Alloc CameraManager");
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manager = [[CameraManager alloc] init];
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}
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}
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return manager;
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}
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#pragma mark - 寻找前置摄像头，没有则返回空
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- (AVCaptureDevice *)frontFacingCamera {
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return [self cameraWithPosition:AVCaptureDevicePositionFront];
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}
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#pragma mark - 寻找背置摄像头，没有则返回空
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- (AVCaptureDevice *)backFacingCamera {
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return [self cameraWithPosition:AVCaptureDevicePositionBack];
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}
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#pragma mark - 从指定AVCaptureDevice的位置获取设置
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- (AVCaptureDevice *)cameraWithPosition:(AVCaptureDevicePosition) position {
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NSArray *devices = [AVCaptureDevice devicesWithMediaType:AVMediaTypeVideo];
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for (AVCaptureDevice *device in devices) {
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if ([device position] == position) {
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return device;
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}
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}
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return nil;
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}
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- (NSUInteger)cameraCount {
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return [[AVCaptureDevice devicesWithMediaType:AVMediaTypeVideo] count];
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}
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#pragma mark - 前后摄像头切换
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- (int)cameraChange {
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if ([self cameraCount] > 1) {
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NSError *error;
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AVCaptureDevicePosition position = self.input.device.position;
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[self.session beginConfiguration];
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[self.session removeInput:self.input];
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self.input = nil;
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AVCaptureDeviceInput * newDeviceInput = nil;
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if (position == AVCaptureDevicePositionBack) {
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newDeviceInput =
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[AVCaptureDeviceInput deviceInputWithDevice:[self frontFacingCamera] error:&error];
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} else if (position == AVCaptureDevicePositionFront) {
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newDeviceInput =
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[AVCaptureDeviceInput deviceInputWithDevice:[self backFacingCamera] error:&error];
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}
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if (newDeviceInput != nil) {
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if ([self.session canAddInput:newDeviceInput]) {
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[self.session addInput:newDeviceInput];
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self.input = newDeviceInput;
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}
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}
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position = self.input.device.position;
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[self setFrontCameraChangeOrientationToLandscapeRight];
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[self.session commitConfiguration];
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}
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//自动对焦
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//[self autoFocusAtPoint:CGPointMake(.5f, .5f)];
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return self.input.device.position;
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}
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#pragma mark - 自动对焦
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- (void)autoFocusAtPoint:(CGPoint)point {
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AVCaptureDevice *device = self.input.device;
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if ([device isFocusPointOfInterestSupported] && [device isFocusModeSupported:AVCaptureFocusModeAutoFocus]) {
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NSError *error;
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if ([device lockForConfiguration:&error]) {
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[device setFocusPointOfInterest:point];
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[device setFocusMode:AVCaptureFocusModeAutoFocus];
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[device unlockForConfiguration];
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}
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}
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}
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- (void)setFrontCameraChangeOrientationToLandscapeRight {
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for (AVCaptureConnection *connection in self.output.connections)
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if (connection.supportsVideoOrientation && connection.videoOrientation != AVCaptureVideoOrientationLandscapeRight)
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[connection setVideoOrientation:AVCaptureVideoOrientationLandscapeRight];
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}
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- (void)setFrameRate:(NSInteger)fRate {
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DLog(@"setFrameRate");
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if (fRate > 0)
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{
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for (AVCaptureConnection *connection in self.output.connections)
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{
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if ([connection respondsToSelector:@selector(setVideoMinFrameDuration:)])
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connection.videoMinFrameDuration = CMTimeMake(1, fRate);
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if ([connection respondsToSelector:@selector(setVideoMaxFrameDuration:)])
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if ( connection.isVideoMaxFrameDurationSupported ) {
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connection.videoMaxFrameDuration = CMTimeMake(1, fRate);
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}
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}
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}
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else
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{
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for (AVCaptureConnection *connection in self.output.connections)
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{
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if ([connection respondsToSelector:@selector(setVideoMinFrameDuration:)])
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connection.videoMinFrameDuration = kCMTimeInvalid; // This sets videoMinFrameDuration back to default
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if ([connection respondsToSelector:@selector(setVideoMaxFrameDuration:)])
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connection.videoMaxFrameDuration = kCMTimeInvalid; // This sets videoMaxFrameDuration back to default
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}
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}
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}
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- (NSInteger)frameRate {
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return self.frameRate;
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}
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- (void)addCameraView:(UIView *)view
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{
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UIView *bgView = [[UIView alloc] initWithFrame:view.bounds];
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[bgView setBackgroundColor:[UIColor blackColor]];
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[self.previewLayer setBackgroundColor:[UIColor blackColor].CGColor];
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[self.previewLayer setFrame:view.bounds];
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[bgView.layer addSublayer:self.previewLayer];
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[view addSubview:bgView];
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[view sendSubviewToBack:bgView];
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[self.previewLayer setOrientation:AVCaptureVideoOrientationLandscapeRight];
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}
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-(void)startCamera:(BOOL)isFont{
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AVCaptureSession *session = [[AVCaptureSession alloc] init];
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[session beginConfiguration];
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[session setSessionPreset:AVCaptureSessionPreset352x288];
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AVCaptureVideoDataOutput * newVideoDataOutput = [[AVCaptureVideoDataOutput alloc] init];
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// 指定像素格式
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newVideoDataOutput.videoSettings = [NSDictionary dictionaryWithObjectsAndKeys:
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[NSNumber numberWithInt:kCVPixelFormatType_32BGRA],
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kCVPixelBufferPixelFormatTypeKey,nil];
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newVideoDataOutput.alwaysDiscardsLateVideoFrames = YES;
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// 配置图像输出
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if ([session canAddOutput:newVideoDataOutput]) {
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[session addOutput:newVideoDataOutput];
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dispatch_queue_t queue = dispatch_queue_create("com.yige.cameraProcessingQueue", NULL);
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[newVideoDataOutput setSampleBufferDelegate:self queue:queue];
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dispatch_release(queue);
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self.output = newVideoDataOutput;
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}
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[newVideoDataOutput release];
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// 设置预览祯率
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self.frameRate = VIDEO_FRAME_RATE;
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if(isFont){
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AVCaptureDeviceInput * newDeviceInput = [AVCaptureDeviceInput deviceInputWithDevice:[self frontFacingCamera] error:nil];
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if ([session canAddInput:newDeviceInput]) {
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[session addInput:newDeviceInput];
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self.input = newDeviceInput;
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}
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}else{
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AVCaptureDeviceInput * newDeviceInput = [AVCaptureDeviceInput deviceInputWithDevice:[self backFacingCamera] error:nil];
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if ([session canAddInput:newDeviceInput]) {
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[session addInput:newDeviceInput];
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self.input = newDeviceInput;
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}
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}
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AVCaptureVideoPreviewLayer * newPreviewLayer =
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[[AVCaptureVideoPreviewLayer alloc] initWithSession:session];
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[newPreviewLayer setVideoGravity:AVLayerVideoGravityResizeAspectFill];
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self.previewLayer = newPreviewLayer;
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[newPreviewLayer release];
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for (AVCaptureConnection *connection in self.output.connections)
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if (connection.supportsVideoOrientation && connection.videoOrientation != AVCaptureVideoOrientationLandscapeRight)
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[connection setVideoOrientation:AVCaptureVideoOrientationLandscapeRight];
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[session commitConfiguration];
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[session startRunning];
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self.session = session;
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self.isRun = YES;
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[session release];
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}
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-(void)stopCamera{
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if([self session]){
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self.isRun = NO;
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[self.session stopRunning];
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// [self.session release];
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// [self.input release];
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// [self.output release];
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// [self.previewLayer release];
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self.session = nil;
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self.input = nil;
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self.output = nil;
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self.previewLayer = nil;
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}
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}
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-(void)captureOutput:(AVCaptureOutput *)captureOutput didOutputSampleBuffer:(CMSampleBufferRef)sampleBuffer fromConnection:(AVCaptureConnection *)connection{
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if(self.isRun){
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@autoreleasepool {
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self.isFinishCaptureOutput = NO;
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CVImageBufferRef imageBuffer = CMSampleBufferGetImageBuffer(sampleBuffer);
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CVPixelBufferLockBaseAddress(imageBuffer,0);
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uint8_t *baseAddress = (uint8_t *)CVPixelBufferGetBaseAddress(imageBuffer);
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DWORD dwSize = CVPixelBufferGetDataSize(imageBuffer);
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DWORD dwWidth = CVPixelBufferGetWidth(imageBuffer);
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DWORD dwHeight = CVPixelBufferGetHeight(imageBuffer);
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//设备端生成视频
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if (self.session.sessionPreset == AVCaptureSessionPreset352x288) {
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fgFillVideoRawFrame(baseAddress, dwSize, dwWidth, dwHeight, 0);
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}else {
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fgFillVideoRawFrame(baseAddress, dwSize, dwWidth, dwHeight, 1);
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}
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CVPixelBufferUnlockBaseAddress(imageBuffer, 0);
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self.isFinishCaptureOutput = YES;
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}
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}
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}
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@end
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