576 lines
21 KiB
Text
576 lines
21 KiB
Text
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//
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// CvVideoCamera2.mm
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//
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// Created by Giles Payne on 2020/03/11.
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//
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#import "Mat.h"
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#import "CvCamera2.h"
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#import <UIKit/UIKit.h>
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static CGFloat DegreesToRadians(CGFloat degrees) {return degrees * M_PI / 180;}
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#pragma mark - Private Interface
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@interface CvVideoCamera2 () {
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int recordingCountDown;
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}
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- (void)createVideoDataOutput;
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- (void)createVideoFileOutput;
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@property (nonatomic, strong) CALayer *customPreviewLayer;
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@property (nonatomic, strong) AVCaptureVideoDataOutput *videoDataOutput;
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@end
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#pragma mark - Implementation
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@implementation CvVideoCamera2
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{
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id<CvVideoCameraDelegate2> _delegate;
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dispatch_queue_t videoDataOutputQueue;
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CMTime lastSampleTime;
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}
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- (void)setDelegate:(id<CvVideoCameraDelegate2>)newDelegate {
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_delegate = newDelegate;
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}
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- (id<CvVideoCameraDelegate2>)delegate {
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return _delegate;
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}
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#pragma mark - Constructors
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- (id)initWithParentView:(UIView*)parent {
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self = [super initWithParentView:parent];
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if (self) {
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parent.contentMode = UIViewContentModeScaleAspectFill;
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self.useAVCaptureVideoPreviewLayer = NO;
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self.recordVideo = NO;
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self.rotateVideo = NO;
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self.defaultAVCaptureDevicePosition = AVCaptureDevicePositionBack;
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self.defaultAVCaptureSessionPreset = AVCaptureSessionPresetHigh;
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self.defaultAVCaptureVideoOrientation = AVCaptureVideoOrientationPortrait;
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self.defaultFPS = 30;
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self.grayscaleMode = NO;
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}
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return self;
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}
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#pragma mark - Public interface
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- (void)start {
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if (self.running == YES) {
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return;
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}
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recordingCountDown = 10;
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[super start];
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if (self.recordVideo == YES) {
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NSError* error = nil;
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if ([[NSFileManager defaultManager] fileExistsAtPath:[self videoFileString]]) {
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[[NSFileManager defaultManager] removeItemAtPath:[self videoFileString] error:&error];
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}
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if (error == nil) {
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NSLog(@"[Camera] Delete file %@", [self videoFileString]);
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}
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}
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}
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- (void)stop {
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if (self.running == YES) {
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[super stop];
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if (self.recordVideo == YES) {
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if (self.recordAssetWriter) {
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if (self.recordAssetWriter.status == AVAssetWriterStatusWriting) {
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[self.recordAssetWriter finishWritingWithCompletionHandler:^void() {
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NSLog(@"[Camera] recording stopped");
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}];
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} else {
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NSLog(@"[Camera] Recording Error: asset writer status is not writing");
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}
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}
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}
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if (self.customPreviewLayer) {
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[self.customPreviewLayer removeFromSuperlayer];
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self.customPreviewLayer = nil;
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}
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}
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}
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// TODO fix
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- (void)adjustLayoutToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation {
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NSLog(@"layout preview layer");
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if (self.parentView != nil) {
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CALayer* layer = self.customPreviewLayer;
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CGRect bounds = self.customPreviewLayer.bounds;
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int rotation_angle = 0;
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bool flip_bounds = false;
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switch (interfaceOrientation) {
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case UIInterfaceOrientationPortrait:
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NSLog(@"to Portrait");
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rotation_angle = 270;
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break;
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case UIInterfaceOrientationPortraitUpsideDown:
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rotation_angle = 90;
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NSLog(@"to UpsideDown");
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break;
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case UIInterfaceOrientationLandscapeLeft:
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rotation_angle = 0;
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NSLog(@"to LandscapeLeft");
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break;
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case UIInterfaceOrientationLandscapeRight:
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rotation_angle = 180;
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NSLog(@"to LandscapeRight");
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break;
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default:
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break; // leave the layer in its last known orientation
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}
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switch (self.defaultAVCaptureVideoOrientation) {
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case AVCaptureVideoOrientationLandscapeRight:
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rotation_angle += 180;
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break;
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case AVCaptureVideoOrientationPortraitUpsideDown:
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rotation_angle += 270;
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break;
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case AVCaptureVideoOrientationPortrait:
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rotation_angle += 90;
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case AVCaptureVideoOrientationLandscapeLeft:
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break;
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default:
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break;
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}
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rotation_angle = rotation_angle % 360;
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if (rotation_angle == 90 || rotation_angle == 270) {
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flip_bounds = true;
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}
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if (flip_bounds) {
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NSLog(@"flip bounds");
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bounds = CGRectMake(0, 0, bounds.size.height, bounds.size.width);
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}
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layer.position = CGPointMake(self.parentView.frame.size.width/2., self.parentView.frame.size.height/2.);
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self.customPreviewLayer.bounds = CGRectMake(0, 0, self.parentView.frame.size.width, self.parentView.frame.size.height);
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layer.affineTransform = CGAffineTransformMakeRotation( DegreesToRadians(rotation_angle) );
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layer.bounds = bounds;
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}
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}
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// TODO fix
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- (void)layoutPreviewLayer {
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NSLog(@"layout preview layer");
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if (self.parentView != nil) {
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CALayer* layer = self.customPreviewLayer;
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CGRect bounds = self.customPreviewLayer.bounds;
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int rotation_angle = 0;
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bool flip_bounds = false;
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switch (self.currentDeviceOrientation) {
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case UIDeviceOrientationPortrait:
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rotation_angle = 270;
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break;
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case UIDeviceOrientationPortraitUpsideDown:
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rotation_angle = 90;
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break;
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case UIDeviceOrientationLandscapeLeft:
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NSLog(@"left");
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rotation_angle = 180;
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break;
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case UIDeviceOrientationLandscapeRight:
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NSLog(@"right");
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rotation_angle = 0;
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break;
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case UIDeviceOrientationFaceUp:
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case UIDeviceOrientationFaceDown:
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default:
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break; // leave the layer in its last known orientation
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}
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switch (self.defaultAVCaptureVideoOrientation) {
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case AVCaptureVideoOrientationLandscapeRight:
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rotation_angle += 180;
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break;
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case AVCaptureVideoOrientationPortraitUpsideDown:
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rotation_angle += 270;
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break;
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case AVCaptureVideoOrientationPortrait:
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rotation_angle += 90;
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case AVCaptureVideoOrientationLandscapeLeft:
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break;
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default:
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break;
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}
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rotation_angle = rotation_angle % 360;
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if (rotation_angle == 90 || rotation_angle == 270) {
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flip_bounds = true;
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}
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if (flip_bounds) {
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NSLog(@"flip bounds");
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bounds = CGRectMake(0, 0, bounds.size.height, bounds.size.width);
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}
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layer.position = CGPointMake(self.parentView.frame.size.width/2., self.parentView.frame.size.height/2.);
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layer.affineTransform = CGAffineTransformMakeRotation( DegreesToRadians(rotation_angle) );
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layer.bounds = bounds;
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}
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}
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#pragma mark - Private Interface
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- (void)createVideoDataOutput {
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// Make a video data output
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self.videoDataOutput = [AVCaptureVideoDataOutput new];
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// In grayscale mode we want YUV (YpCbCr 4:2:0) so we can directly access the graylevel intensity values (Y component)
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// In color mode we, BGRA format is used
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OSType format = self.grayscaleMode ? kCVPixelFormatType_420YpCbCr8BiPlanarFullRange : kCVPixelFormatType_32BGRA;
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self.videoDataOutput.videoSettings = [NSDictionary dictionaryWithObject:[NSNumber numberWithUnsignedInt:format]
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forKey:(id)kCVPixelBufferPixelFormatTypeKey];
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// discard if the data output queue is blocked (as we process the still image)
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[self.videoDataOutput setAlwaysDiscardsLateVideoFrames:YES];
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if ( [self.captureSession canAddOutput:self.videoDataOutput] ) {
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[self.captureSession addOutput:self.videoDataOutput];
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}
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[[self.videoDataOutput connectionWithMediaType:AVMediaTypeVideo] setEnabled:YES];
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// set default FPS
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AVCaptureDeviceInput *currentInput = [self.captureSession.inputs objectAtIndex:0];
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AVCaptureDevice *device = currentInput.device;
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NSError *error = nil;
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[device lockForConfiguration:&error];
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float maxRate = ((AVFrameRateRange*) [device.activeFormat.videoSupportedFrameRateRanges objectAtIndex:0]).maxFrameRate;
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if (maxRate > self.defaultFPS - 1 && error == nil) {
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[device setActiveVideoMinFrameDuration:CMTimeMake(1, self.defaultFPS)];
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[device setActiveVideoMaxFrameDuration:CMTimeMake(1, self.defaultFPS)];
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NSLog(@"[Camera] FPS set to %d", self.defaultFPS);
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} else {
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NSLog(@"[Camera] unable to set defaultFPS at %d FPS, max is %f FPS", self.defaultFPS, maxRate);
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}
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if (error != nil) {
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NSLog(@"[Camera] unable to set defaultFPS: %@", error);
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}
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[device unlockForConfiguration];
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// set video mirroring for front camera (more intuitive)
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if ([self.videoDataOutput connectionWithMediaType:AVMediaTypeVideo].supportsVideoMirroring) {
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if (self.defaultAVCaptureDevicePosition == AVCaptureDevicePositionFront) {
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[self.videoDataOutput connectionWithMediaType:AVMediaTypeVideo].videoMirrored = YES;
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} else {
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[self.videoDataOutput connectionWithMediaType:AVMediaTypeVideo].videoMirrored = NO;
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}
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}
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// set default video orientation
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if ([self.videoDataOutput connectionWithMediaType:AVMediaTypeVideo].supportsVideoOrientation) {
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[self.videoDataOutput connectionWithMediaType:AVMediaTypeVideo].videoOrientation = self.defaultAVCaptureVideoOrientation;
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}
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// create a custom preview layer
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self.customPreviewLayer = [CALayer layer];
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self.customPreviewLayer.bounds = CGRectMake(0, 0, self.parentView.frame.size.width, self.parentView.frame.size.height);
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self.customPreviewLayer.position = CGPointMake(self.parentView.frame.size.width/2., self.parentView.frame.size.height/2.);
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[self updateOrientation];
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// create a serial dispatch queue used for the sample buffer delegate as well as when a still image is captured
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// a serial dispatch queue must be used to guarantee that video frames will be delivered in order
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// see the header doc for setSampleBufferDelegate:queue: for more information
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videoDataOutputQueue = dispatch_queue_create("VideoDataOutputQueue", DISPATCH_QUEUE_SERIAL);
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[self.videoDataOutput setSampleBufferDelegate:self queue:videoDataOutputQueue];
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NSLog(@"[Camera] created AVCaptureVideoDataOutput");
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}
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- (void)createVideoFileOutput {
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/* Video File Output in H.264, via AVAsserWriter */
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NSLog(@"Create Video with dimensions %dx%d", self.imageWidth, self.imageHeight);
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NSDictionary *outputSettings
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= [NSDictionary dictionaryWithObjectsAndKeys:[NSNumber numberWithInt:self.imageWidth], AVVideoWidthKey,
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[NSNumber numberWithInt:self.imageHeight], AVVideoHeightKey,
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AVVideoCodecH264, AVVideoCodecKey,
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nil
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];
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self.recordAssetWriterInput = [AVAssetWriterInput assetWriterInputWithMediaType:AVMediaTypeVideo outputSettings:outputSettings];
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int pixelBufferFormat = (self.grayscaleMode == YES) ? kCVPixelFormatType_420YpCbCr8BiPlanarFullRange : kCVPixelFormatType_32BGRA;
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self.recordPixelBufferAdaptor =
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[[AVAssetWriterInputPixelBufferAdaptor alloc]
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initWithAssetWriterInput:self.recordAssetWriterInput
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sourcePixelBufferAttributes:[NSDictionary dictionaryWithObjectsAndKeys:[NSNumber numberWithInt:pixelBufferFormat], kCVPixelBufferPixelFormatTypeKey, nil]];
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NSError* error = nil;
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NSLog(@"Create AVAssetWriter with url: %@", [self videoFileURL]);
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self.recordAssetWriter = [AVAssetWriter assetWriterWithURL:[self videoFileURL]
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fileType:AVFileTypeMPEG4
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error:&error];
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if (error != nil) {
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NSLog(@"[Camera] Unable to create AVAssetWriter: %@", error);
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}
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[self.recordAssetWriter addInput:self.recordAssetWriterInput];
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self.recordAssetWriterInput.expectsMediaDataInRealTime = YES;
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NSLog(@"[Camera] created AVAssetWriter");
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}
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- (void)createCaptureOutput {
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[self createVideoDataOutput];
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if (self.recordVideo == YES) {
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[self createVideoFileOutput];
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}
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}
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- (void)createCustomVideoPreview {
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[self.parentView.layer addSublayer:self.customPreviewLayer];
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}
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- (CVPixelBufferRef) pixelBufferFromCGImage: (CGImageRef) image {
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CGSize frameSize = CGSizeMake(CGImageGetWidth(image), CGImageGetHeight(image));
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NSDictionary *options = [NSDictionary dictionaryWithObjectsAndKeys:
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[NSNumber numberWithBool:NO], kCVPixelBufferCGImageCompatibilityKey,
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[NSNumber numberWithBool:NO], kCVPixelBufferCGBitmapContextCompatibilityKey,
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nil];
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CVPixelBufferRef pxbuffer = NULL;
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CVReturn status = CVPixelBufferCreate(kCFAllocatorDefault, frameSize.width,
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frameSize.height, kCVPixelFormatType_32ARGB, (CFDictionaryRef) CFBridgingRetain(options),
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&pxbuffer);
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NSParameterAssert(status == kCVReturnSuccess && pxbuffer != NULL);
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CVPixelBufferLockBaseAddress(pxbuffer, 0);
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void *pxdata = CVPixelBufferGetBaseAddress(pxbuffer);
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CGColorSpaceRef rgbColorSpace = CGColorSpaceCreateDeviceRGB();
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CGContextRef context = CGBitmapContextCreate(pxdata, frameSize.width,
|
||
|
|
frameSize.height, 8, 4*frameSize.width, rgbColorSpace,
|
||
|
|
kCGImageAlphaPremultipliedFirst);
|
||
|
|
|
||
|
|
CGContextDrawImage(context, CGRectMake(0, 0, CGImageGetWidth(image),
|
||
|
|
CGImageGetHeight(image)), image);
|
||
|
|
CGColorSpaceRelease(rgbColorSpace);
|
||
|
|
CGContextRelease(context);
|
||
|
|
|
||
|
|
CVPixelBufferUnlockBaseAddress(pxbuffer, 0);
|
||
|
|
|
||
|
|
return pxbuffer;
|
||
|
|
}
|
||
|
|
|
||
|
|
#pragma mark - Protocol AVCaptureVideoDataOutputSampleBufferDelegate
|
||
|
|
|
||
|
|
- (void)captureOutput:(AVCaptureOutput *)captureOutput didOutputSampleBuffer:(CMSampleBufferRef)sampleBuffer fromConnection:(AVCaptureConnection *)connection
|
||
|
|
{
|
||
|
|
(void)captureOutput;
|
||
|
|
(void)connection;
|
||
|
|
auto strongDelegate = self.delegate;
|
||
|
|
if (strongDelegate) {
|
||
|
|
|
||
|
|
// convert from Core Media to Core Video
|
||
|
|
CVImageBufferRef imageBuffer = CMSampleBufferGetImageBuffer(sampleBuffer);
|
||
|
|
CVPixelBufferLockBaseAddress(imageBuffer, 0);
|
||
|
|
|
||
|
|
void* bufferAddress;
|
||
|
|
size_t width;
|
||
|
|
size_t height;
|
||
|
|
size_t bytesPerRow;
|
||
|
|
|
||
|
|
CGColorSpaceRef colorSpace;
|
||
|
|
CGContextRef context;
|
||
|
|
|
||
|
|
int format_opencv;
|
||
|
|
|
||
|
|
OSType format = CVPixelBufferGetPixelFormatType(imageBuffer);
|
||
|
|
if (format == kCVPixelFormatType_420YpCbCr8BiPlanarFullRange) {
|
||
|
|
|
||
|
|
format_opencv = CV_8UC1;
|
||
|
|
|
||
|
|
bufferAddress = CVPixelBufferGetBaseAddressOfPlane(imageBuffer, 0);
|
||
|
|
width = CVPixelBufferGetWidthOfPlane(imageBuffer, 0);
|
||
|
|
height = CVPixelBufferGetHeightOfPlane(imageBuffer, 0);
|
||
|
|
bytesPerRow = CVPixelBufferGetBytesPerRowOfPlane(imageBuffer, 0);
|
||
|
|
|
||
|
|
} else { // expect kCVPixelFormatType_32BGRA
|
||
|
|
|
||
|
|
format_opencv = CV_8UC4;
|
||
|
|
|
||
|
|
bufferAddress = CVPixelBufferGetBaseAddress(imageBuffer);
|
||
|
|
width = CVPixelBufferGetWidth(imageBuffer);
|
||
|
|
height = CVPixelBufferGetHeight(imageBuffer);
|
||
|
|
bytesPerRow = CVPixelBufferGetBytesPerRow(imageBuffer);
|
||
|
|
|
||
|
|
}
|
||
|
|
|
||
|
|
// delegate image processing to the delegate
|
||
|
|
cv::Mat image((int)height, (int)width, format_opencv, bufferAddress, bytesPerRow);
|
||
|
|
|
||
|
|
CGImage* dstImage;
|
||
|
|
|
||
|
|
if ([strongDelegate respondsToSelector:@selector(processImage:)]) {
|
||
|
|
[strongDelegate processImage:[Mat fromNative:image]];
|
||
|
|
}
|
||
|
|
|
||
|
|
// check if matrix data pointer or dimensions were changed by the delegate
|
||
|
|
bool iOSimage = false;
|
||
|
|
if (height == (size_t)image.rows && width == (size_t)image.cols && format_opencv == image.type() && bufferAddress == image.data && bytesPerRow == image.step) {
|
||
|
|
iOSimage = true;
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
// (create color space, create graphics context, render buffer)
|
||
|
|
CGBitmapInfo bitmapInfo;
|
||
|
|
|
||
|
|
// basically we decide if it's a grayscale, rgb or rgba image
|
||
|
|
if (image.channels() == 1) {
|
||
|
|
colorSpace = CGColorSpaceCreateDeviceGray();
|
||
|
|
bitmapInfo = kCGImageAlphaNone;
|
||
|
|
} else if (image.channels() == 3) {
|
||
|
|
colorSpace = CGColorSpaceCreateDeviceRGB();
|
||
|
|
bitmapInfo = kCGImageAlphaNone;
|
||
|
|
if (iOSimage) {
|
||
|
|
bitmapInfo |= kCGBitmapByteOrder32Little;
|
||
|
|
} else {
|
||
|
|
bitmapInfo |= kCGBitmapByteOrder32Big;
|
||
|
|
}
|
||
|
|
} else {
|
||
|
|
colorSpace = CGColorSpaceCreateDeviceRGB();
|
||
|
|
bitmapInfo = kCGImageAlphaPremultipliedFirst;
|
||
|
|
if (iOSimage) {
|
||
|
|
bitmapInfo |= kCGBitmapByteOrder32Little;
|
||
|
|
} else {
|
||
|
|
bitmapInfo |= kCGBitmapByteOrder32Big;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
if (iOSimage) {
|
||
|
|
context = CGBitmapContextCreate(bufferAddress, width, height, 8, bytesPerRow, colorSpace, bitmapInfo);
|
||
|
|
dstImage = CGBitmapContextCreateImage(context);
|
||
|
|
CGContextRelease(context);
|
||
|
|
} else {
|
||
|
|
|
||
|
|
NSData *data = [NSData dataWithBytes:image.data length:image.elemSize()*image.total()];
|
||
|
|
CGDataProviderRef provider = CGDataProviderCreateWithCFData((__bridge CFDataRef)data);
|
||
|
|
|
||
|
|
// Creating CGImage from cv::Mat
|
||
|
|
dstImage = CGImageCreate(image.cols, // width
|
||
|
|
image.rows, // height
|
||
|
|
8, // bits per component
|
||
|
|
8 * image.elemSize(), // bits per pixel
|
||
|
|
image.step, // bytesPerRow
|
||
|
|
colorSpace, // colorspace
|
||
|
|
bitmapInfo, // bitmap info
|
||
|
|
provider, // CGDataProviderRef
|
||
|
|
NULL, // decode
|
||
|
|
false, // should interpolate
|
||
|
|
kCGRenderingIntentDefault // intent
|
||
|
|
);
|
||
|
|
|
||
|
|
CGDataProviderRelease(provider);
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
// render buffer
|
||
|
|
dispatch_sync(dispatch_get_main_queue(), ^{
|
||
|
|
self.customPreviewLayer.contents = (__bridge id)dstImage;
|
||
|
|
});
|
||
|
|
|
||
|
|
|
||
|
|
recordingCountDown--;
|
||
|
|
if (self.recordVideo == YES && recordingCountDown < 0) {
|
||
|
|
lastSampleTime = CMSampleBufferGetPresentationTimeStamp(sampleBuffer);
|
||
|
|
// CMTimeShow(lastSampleTime);
|
||
|
|
if (self.recordAssetWriter.status != AVAssetWriterStatusWriting) {
|
||
|
|
[self.recordAssetWriter startWriting];
|
||
|
|
[self.recordAssetWriter startSessionAtSourceTime:lastSampleTime];
|
||
|
|
if (self.recordAssetWriter.status != AVAssetWriterStatusWriting) {
|
||
|
|
NSLog(@"[Camera] Recording Error: asset writer status is not writing: %@", self.recordAssetWriter.error);
|
||
|
|
return;
|
||
|
|
} else {
|
||
|
|
NSLog(@"[Camera] Video recording started");
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
if (self.recordAssetWriterInput.readyForMoreMediaData) {
|
||
|
|
CVImageBufferRef pixelBuffer = [self pixelBufferFromCGImage:dstImage];
|
||
|
|
if (! [self.recordPixelBufferAdaptor appendPixelBuffer:pixelBuffer
|
||
|
|
withPresentationTime:lastSampleTime] ) {
|
||
|
|
NSLog(@"Video Writing Error");
|
||
|
|
}
|
||
|
|
if (pixelBuffer != nullptr)
|
||
|
|
CVPixelBufferRelease(pixelBuffer);
|
||
|
|
}
|
||
|
|
|
||
|
|
}
|
||
|
|
|
||
|
|
// cleanup
|
||
|
|
CGImageRelease(dstImage);
|
||
|
|
CGColorSpaceRelease(colorSpace);
|
||
|
|
CVPixelBufferUnlockBaseAddress(imageBuffer, 0);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
- (void)updateOrientation {
|
||
|
|
if (self.rotateVideo == YES)
|
||
|
|
{
|
||
|
|
NSLog(@"rotate..");
|
||
|
|
self.customPreviewLayer.bounds = CGRectMake(0, 0, self.parentView.frame.size.width, self.parentView.frame.size.height);
|
||
|
|
[self layoutPreviewLayer];
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
- (void)saveVideo {
|
||
|
|
if (self.recordVideo == NO) {
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
|
||
|
|
UISaveVideoAtPathToSavedPhotosAlbum([self videoFileString], nil, nil, NULL);
|
||
|
|
}
|
||
|
|
|
||
|
|
- (NSURL *)videoFileURL {
|
||
|
|
NSString *outputPath = [[NSString alloc] initWithFormat:@"%@%@", NSTemporaryDirectory(), @"output.mov"];
|
||
|
|
NSURL *outputURL = [NSURL fileURLWithPath:outputPath];
|
||
|
|
NSFileManager *fileManager = [NSFileManager defaultManager];
|
||
|
|
if ([fileManager fileExistsAtPath:outputPath]) {
|
||
|
|
NSLog(@"file exists");
|
||
|
|
}
|
||
|
|
return outputURL;
|
||
|
|
}
|
||
|
|
|
||
|
|
- (NSString *)videoFileString {
|
||
|
|
NSString *outputPath = [[NSString alloc] initWithFormat:@"%@%@", NSTemporaryDirectory(), @"output.mov"];
|
||
|
|
return outputPath;
|
||
|
|
}
|
||
|
|
|
||
|
|
@end
|