Convert incoming NSStream to View - ios

Question

I'm successfully sending a stream of NSData. The delegate method below is getting that stream and appending to NSMutableData self.data. How do I take this data and make it into a UIView/AVCaptureVideoPreviewLayer (which should show video)? I feel like I'm missing another conversion, AVCaptureSession > NSStream > MCSession > NSStream > ?
- (void)stream:(NSStream *)stream handleEvent:(NSStreamEvent)eventCode {
switch(eventCode) {
case NSStreamEventHasBytesAvailable:
{
if(!self.data) {
self.data = [NSMutableData data];
}
uint8_t buf[1024];
unsigned int len = 0;
len = [(NSInputStream *)stream read:buf maxLength:1024];
if(len) {
[self.data appendBytes:(const void *)buf length:len];
} else {
NSLog(#"no buffer!");
}
// Code here to take self.data and convert the NSData to UIView/Video
}
I send the stream with this:
-(void) captureOutput:(AVCaptureOutput*)captureOutput didOutputSampleBuffer:(CMSampleBufferRef)sampleBuffer fromConnection:(AVCaptureConnection*)connection
{
CVImageBufferRef imageBuffer = CMSampleBufferGetImageBuffer(sampleBuffer);
CVPixelBufferLockBaseAddress(imageBuffer,0);
size_t bytesPerRow = CVPixelBufferGetBytesPerRow(imageBuffer);
// size_t width = CVPixelBufferGetWidth(imageBuffer);
size_t height = CVPixelBufferGetHeight(imageBuffer);
void *src_buff = CVPixelBufferGetBaseAddress(imageBuffer);
NSData *data = [NSData dataWithBytes:src_buff length:bytesPerRow * height];
CVPixelBufferUnlockBaseAddress(imageBuffer, 0);
NSError *error;
self.oStream = [self.mySession startStreamWithName:#"videoOut" toPeer:[[self.mySession connectedPeers]objectAtIndex:0] error:&error];
self.oStream.delegate = self;
[self.oStream scheduleInRunLoop:[NSRunLoop mainRunLoop]
forMode:NSDefaultRunLoopMode];
[self.oStream open];
[self.oStream write:[data bytes] maxLength:[data length]];
// CVImageBufferRef imageBuffer = CMSampleBufferGetImageBuffer( sampleBuffer );
CGSize imageSize = CVImageBufferGetEncodedSize( imageBuffer );
// also in the 'mediaSpecific' dict of the sampleBuffer
NSLog( #"frame captured at %.fx%.f", imageSize.width, imageSize.height );
}

Answer 1

I think you need AVCaptureManager, see if the code below works for you..
AVCamCaptureManager *manager = [[AVCamCaptureManager alloc] init];
[self setCaptureManager:manager];
[[self captureManager] setDelegate:self];
if ([[self captureManager] setupSession]) {
// Create video preview layer and add it to the UI
AVCaptureVideoPreviewLayer *newCaptureVideoPreviewLayer = [[AVCaptureVideoPreviewLayer alloc] initWithSession:[[self captureManager] session]];
UIView *view = self.videoPreviewView;//Add a view in XIB where you want to show video
CALayer *viewLayer = [view layer];
[viewLayer setMasksToBounds:YES];
CGRect bounds = [view bounds];
[newCaptureVideoPreviewLayer setFrame:bounds];
[newCaptureVideoPreviewLayer setVideoGravity:AVLayerVideoGravityResizeAspectFill];
[viewLayer insertSublayer:newCaptureVideoPreviewLayer below:[[viewLayer sublayers] objectAtIndex:0]];
[self setCaptureVideoPreviewLayer:newCaptureVideoPreviewLayer];
dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{
[[[self captureManager] session] startRunning];
});
}
Manage the delegates
- (void)captureManager:(AVCamCaptureManager *)captureManager didFailWithError:(NSError *)error
{
}
- (void)captureManagerRecordingBegan:(AVCamCaptureManager *)captureManager
{
}
- (void)captureManagerRecordingFinished:(AVCamCaptureManager *)captureManager outputURL:(NSURL *)url
{
}
- (void)captureManagerStillImageCaptured:(AVCamCaptureManager *)captureManager
{
}
- (void)captureManagerDeviceConfigurationChanged:(AVCamCaptureManager *)captureManager
{
}
I hope it helps.

Answer 2

You can make an UIImageView on yout handle event like this:
UIImageView * iv = [[UIImageView alloc] initWithImage: [UIImage imageWithData: self.data];
Also you can alloc just once and just call init.
Each time u receive from socket, you initialize the UIImageView and you can show it adding that UIImageView to a UIView.
Sorry for my english, I don´t know if I have understood you