Cannot open output stream using paNonInterleaved on macOS (Blocking I/O)

[pasin-k]

Describe the bug
I implemented an audio-player that is expected to support audio files in non-interleaf audio format. It works perfectly on Windows 10, but when I tested using it on Mac, it returns error -9994 (Sample format not supported).

Note that my implementation uses blocking API. If I add callback function, however, this works perfectly fine. Not sure if this is a bug or just an not implemented feature.

To Reproduce
Using code below

#include <stdio.h>
#include "portaudio.h"

#define FRAMES_PER_BUFFER   (1024)
void printErrorText(PaError err){
    printf("AUDIOIO: An error occurred while using the portaudio stream\n");
    printf("Error number: %d\n", err);
    printf("Error message: %s\n", Pa_GetErrorText(err));
}

int main(int argc, const char * argv[]) {
    char *fileName = "testAudio2.wav";
    char *fileToSave = "testAudio3Out.wav";
    PaError error;
    Pa_Initialize();
    PaStream *stream;
    /* Open PaStream with values read from the file */
    error = Pa_OpenDefaultStream(&stream
            ,0                     /* no input */
            ,2         /* stereo out */
            ,paFloat32|paNonInterleaved            /* floating point */
            ,44100
            ,FRAMES_PER_BUFFER
            ,nullptr
            ,nullptr);        /* our sndfile data struct */

    if(error != paNoError)
    {
        printErrorText(error);
        fprintf(stderr, "Problem opening Stream\n");
        return error;
    }
    return error;

    return 0;
}

Expected behavior
The code above should return 0.

Actual behavior

AUDIOIO: An error occurred while using the portaudio stream
Error number: -9994
Error message: Sample format not supported
Problem opening Stream

Adding callback function resolves problem above but I am struggling with creating callbackfunction in my actual implementation so I would prefer using blocking I/O, if possible.

Desktop (please complete the following information):

• Mac OS
• OS Version 12.5.1
• PortAudio version: 19.7#3 (According to vcpkg)
• Running on c++

Additional context

[RossBencina]

Unfortunately there is a known issue with non-interleaved blocking i/o on Mac: it isn't currently implemented. See:

#77

Other than callbacks, I think the only available workaround for now is to use interleaved blocking i/o.

[pasin-k]

I see. Thank you for the information. I guess I will limit my work to interleaved audio only for now.