Migrate Streaming SDK to Live SDK.

Overview

• Live SDK is the successor of the Streaming SDK, based on Apple's Metal GPU API instead of OpenGL compared to the previous version.
• Streaming SDK will stop major updates. Because Apple has deprecated OpenGL already, developers should consider migrate quickly if still using Streaming SDK.
• Live SDK is developed by Swift. Full support for Objective-C, but Swift is more recommended.

Major difference

Prepare

In Live SDK, method prepare is used for giving captureDevice and preview to manager. You can call prepare or attach methods to change captureDevice any time, even broadcasting.
To change configuration of broadcast, use setConfig and modifyConfig.

Configuration

STSLiveBroadcastConfig is the successor of STSStreamingPrepareConfig. These properties are renamed or redefined:

1. targetOutputSize is redefined to videoSize.
2. outputImageOrientation is renamed to videoOrientation.
3. fitAllCamera and maxVideoHeight removed.
   If videoSize is set to zero, a recommended value depend on videoOrientation and profile in current liveInfo will set when startLive.
   For example, start a 720p and using portrait orientation will get Size(w:720, h:1280).
4. captureDevicePosition removed.
   Use attachCamera to set captureDevice directly, you can use listFrontDevices and listBackDevices to get them.
5. flipFrontCameraOutputHorizontally is renamed to mirrored.
6. audioEnabled is redefined to muted.

Filter

Filters in Streaming SDK is implemented by OpenGLES, it's not longer support in Live SDK.
Live SDK still provide STSBroadcastBeautyFaceEffect to make beauty effect.
If you have customized filter based on OpenGLES, you have to reimplement it with CoreImage.

func execute(_ image: CIImage, info: CMSampleBuffer?) -> CIImage {
    return image
}