Meeting SDK Type and Version
Zoom Meeting SDK (MacOS) v5.14.5.17739
Codebase: Objective C (building on top of ZoomSDKSample Project)
Description
Code Setup
We are trying to fetch the raw audio stream in a Mac app using Meeting SDK.
As per the documentation on raw data, here’s the sequence of operation for getting a raw audio stream:
Pre-Setup
- Get a local recording token for the meeting, and initialize and set the value of
appPrivilegeTokenfor the meeting joining params. - Implement an instance of
ZoomSDKAudioRawDataDelegateand implement callbacks foronMixedAudioRawDataReceivedandonOneWayAudioRawDataReceived.
After the Bot Joins the Meeting
- Call
startRawRecordingmethod, on the instance ofZoomSDKMeetingRecordControllerextracted fromZoomSDK.sharedSDK.getMeetingService.getRecordController - Create a instance of
ZoomSDKAudioRawDataHelperand pass it togetAudioRawDataHelperfor managing subscription. - Call
subscribemethod on the instance ofZoomSDKAudioRawDataHelperto subscribe to the updates happening in stream.
Issue
Even though all the calls mentioned in the steps above result in ZoomSDKError_Success, the audio stream callbacks functions are never called. Log statements written within the functions onMixedAudioRawDataReceived and onOneWayAudioRawDataReceived never appear on the terminal.
Meanwhile the app works, we can interact with it, and perform all operations, however the audio stream data is not there.
A few interesting logs that we observed are:
2023-04-27 15:26:14.878934+0530 ZoomSDKSample_universal[96051:5306020] [default] CGSWindowShmemCreateWithPort failed on port 0
2023-04-27 15:26:14.993745+0530 ZoomSDKSample_universal[96051:5306020] Detected potentially harmful notification post rate of 108.278 notifications per second
Troubleshooting Routes
We searched for this in Zook Developer Forum, StackOverflow and Apple Developer forum, but couldn’t find a reason/solution to this.
Reference Code
We have taken the sample codebase included with zoom SDK as the base codebase, and are playing around with it. Its in Objective C.
ZMSDKRawLocalRecordingStream.h
@class ZoomSDKAudioRawDataDelegate;
@interface ZMSDKRawLocalRecordingStream : NSObject <ZoomSDKAudioRawDataDelegate>
- (ZoomSDKError) subscribeToAudioStream;
@end
ZMSDKRawLocalRecordingStream.m
@interface ZMSDKRawLocalRecordingStream()
{
ZoomSDKMeetingRecordController* meetingRecordController;
ZoomSDKRawDataController* rawDataController;
ZoomSDKAudioRawDataHelper* rawDataHelper;
}
@end
@implementation ZMSDKRawLocalRecordingStream
static ZMSDKRawLocalRecordingStream* recordingDelegateMgr = nil;
- (id)init {
static dispatch_once_t onceToken;
dispatch_once(&onceToken, ^{
if (recordingDelegateMgr) {
rawDataController = [[ZoomSDK sharedSDK] getRawDataController];
meetingRecordController = [[[ZoomSDK sharedSDK] getMeetingService] getRecordController];
}
});
return recordingDelegateMgr;
}
- (ZoomSDKError) subscribeToAudioStream {
ZoomSDKAudioRawDataHelper* localRawDataHelper = [[ZoomSDKAudioRawDataHelper alloc] init];
ZoomSDKError isRawRecordingStarted = [meetingRecordController startRawRecording];
localRawDataHelper.delegate = self;
ZoomSDKError rawDataHelperAssignment = [rawDataController getAudioRawDataHelper:&localRawDataHelper];
ZoomSDKError rawDataHelperSubscription = [localRawDataHelper subscribe];
rawDataHelper = localRawDataHelper;
return rawDataHelperSubscription;
}
- (void)dealloc {
[meetingRecordController stopRawRecording];
[rawDataHelper unSubscribe];
}
- (void)onMixedAudioRawDataReceived:(ZoomSDKAudioRawData *)data {
NSLog(@"ZMSDKRawLocalRecordingStream: onMixedAudioRawDataReceived, bufferLength %d", data.getBufferLen);
}
- (void)onOneWayAudioRawDataReceived:(ZoomSDKAudioRawData *)data nodeID:(unsigned int)nodeID {
NSLog(@"ZMSDKRawLocalRecordingStream: onOneWayAudioRawDataReceived, bufferLength %d", data.getBufferLen);
}
@end
The subscribeToAudioStream method is called when the meeting status changes to ZoomSDKMeetingStatus_InMeeting.
I have also checked for the license using hasRawDataLicense which can be accessed through the instance of ZoomSDKRawDataController. This always returns ZoomSDKError_Success - so this should also not be a blocker for getting the audio stream.