Created
May 4, 2017 10:32
-
-
Save omarojo/2a4ad26d77cfdcd4f9443216bd9ac696 to your computer and use it in GitHub Desktop.
Pause Image for LF Streamer
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
var pausePixelBuffer = CVPixelBuffer? | |
func pauseTheStream(){ | |
//Create your Pause Image | |
createOncePixelBuffer() | |
//Push your Pause Image into the stream | |
pushPixelBufferToStream(self.pausePixelBuffer) | |
//Pause the stream, the video should stop in the last frame, which is your image | |
rtmpStream.togglePause() | |
} | |
func createOncePixelBuffer(){ | |
let myimage = UIImage(named: "myPauseImage")! | |
self.pausePixelBuffer = pixelBufferFromImage(image: myimage); | |
} | |
func pushPixelBufferToStream(pixelBuffer : CVPixelBuffer?){ | |
if let imageBuffer = pixelBuffer { | |
var timingInfo:CMSampleTimingInfo = CMSampleTimingInfo( | |
duration: CMTimeMake(1,30), | |
presentationTimeStamp: self.PTS, | |
decodeTimeStamp: kCMTimeInvalid | |
) | |
var videoFormatDescription:CMVideoFormatDescription? = nil | |
_ = CMVideoFormatDescriptionCreateForImageBuffer( | |
kCFAllocatorDefault, | |
imageBuffer, | |
&videoFormatDescription | |
) | |
var sampleBuffer:CMSampleBuffer? = nil | |
_ = CMSampleBufferCreateForImageBuffer( | |
kCFAllocatorDefault, | |
imageBuffer, | |
true, | |
nil, | |
nil, | |
videoFormatDescription!, | |
&timingInfo, | |
&sampleBuffer | |
) | |
if let buffer:CMSampleBuffer = sampleBuffer { | |
rtmpStream.appendSampleBuffer(buffer, withType: .video); | |
} | |
self.PTS = CMTimeAdd(self.PTS, CMTimeMake(1, 30)); | |
} | |
} | |
func pixelBufferFromImage(image: UIImage) -> CVPixelBuffer { | |
let ciimage = CIImage(image: image) | |
let cgimage = convertCIImageToCGImage(inputImage: ciimage!) | |
let cfnumPointer = UnsafeMutablePointer<UnsafeRawPointer>.allocate(capacity: 1) | |
let cfnum = CFNumberCreate(kCFAllocatorDefault, .intType, cfnumPointer) | |
let keys: [CFString] = [kCVPixelBufferCGImageCompatibilityKey, kCVPixelBufferCGBitmapContextCompatibilityKey, kCVPixelBufferBytesPerRowAlignmentKey] | |
let values: [CFTypeRef] = [kCFBooleanTrue, kCFBooleanTrue, cfnum!] | |
let keysPointer = UnsafeMutablePointer<UnsafeRawPointer?>.allocate(capacity: 1) | |
let valuesPointer = UnsafeMutablePointer<UnsafeRawPointer?>.allocate(capacity: 1) | |
keysPointer.initialize(to: keys) | |
valuesPointer.initialize(to: values) | |
let options = CFDictionaryCreate(kCFAllocatorDefault, keysPointer, valuesPointer, keys.count, nil, nil) | |
let width = cgimage!.width | |
let height = cgimage!.height | |
var pxbuffer: CVPixelBuffer? | |
var status = CVPixelBufferCreate(kCFAllocatorDefault, width, height, | |
kCVPixelFormatType_32ARGB, options, &pxbuffer) | |
debugPrint("status = \(status)") | |
status = CVPixelBufferLockBaseAddress(pxbuffer!, CVPixelBufferLockFlags(rawValue: 0)); | |
let bufferAddress = CVPixelBufferGetBaseAddress(pxbuffer!); | |
debugPrint("pxbuffer.memory = \(pxbuffer)") | |
let rgbColorSpace = CGColorSpaceCreateDeviceRGB(); | |
let bytesperrow = CVPixelBufferGetBytesPerRow(pxbuffer!) | |
let context = CGContext(data: bufferAddress, | |
width: width, | |
height: height, | |
bitsPerComponent: 8, | |
bytesPerRow: bytesperrow, | |
space: rgbColorSpace, | |
bitmapInfo: CGImageAlphaInfo.noneSkipFirst.rawValue); | |
context?.draw(cgimage!, in: CGRect(x:0, y:0, width:CGFloat(width), height:CGFloat(height))); | |
status = CVPixelBufferUnlockBaseAddress(pxbuffer!, CVPixelBufferLockFlags(rawValue: 0)); | |
return pxbuffer!; | |
} | |
func convertCIImageToCGImage(inputImage: CIImage) -> CGImage!{ | |
let context = CIContext(options: nil) | |
return context.createCGImage(inputImage, from: inputImage.extent) | |
} |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
What type is rtmpStream?