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Core Audio: Make capture more robust to format changes on the OS side.

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When the data format of the capture device changes via the Audio MIDI
Setup settings, miniaudio will now reroute the device to take the new
data format into account. Prior to this commit AudioUnitRender() will
just keep failing forever.

Public issue https://github.com/mackron/miniaudio/issues/1136
This commit is contained in:
David Reid
2026-07-19 09:33:31 +10:00
parent ca91ee9bd0
commit 45b63e4a0c
1 changed files with 17 additions and 1 deletions
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miniaudio.h
+17 -1
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@@ -39769,8 +39769,10 @@ static OSStatus ma_on_input__coreaudio(void* pUserData, AudioUnitRenderActionFla
status = pContextStateCoreAudio->AudioUnitRender(pDeviceStateCoreAudio->audioUnitCapture, pActionFlags, pTimeStamp, busNumber, frameCount, pRenderedBufferList);
if (status != noErr) {
/* AudioUnitRender() failed. Attempt a reroute. If the reroute fails, the device will be stopped. */
ma_atomic_bool32_set(&pDeviceStateCoreAudio->isSwitchingCaptureDevice, MA_TRUE);
ma_device_state_async_release(&pDeviceStateCoreAudio->async);
ma_log_postf(ma_device_get_log(pDevice), MA_LOG_LEVEL_DEBUG, "ERROR: AudioUnitRender() failed with %d.", (int)status);
ma_log_postf(ma_device_get_log(pDevice), MA_LOG_LEVEL_DEBUG, "ERROR: AudioUnitRender() failed with %d. Attempting reroute.", (int)status);
return status;
}
@@ -40909,12 +40911,26 @@ static ma_result ma_device_step_extra__coreaudio(ma_device* pDevice)
if (ma_atomic_bool32_get(&pDeviceStateCoreAudio->isSwitchingPlaybackDevice)) {
result = ma_device_reinit_internal__coreaudio(pDevice, ma_device_type_playback, MA_TRUE);
ma_atomic_bool32_set(&pDeviceStateCoreAudio->isSwitchingPlaybackDevice, MA_FALSE);
/* If we failed to switch devices stop the device outright. */
if (result != MA_SUCCESS) {
pContextStateCoreAudio->AudioOutputUnitStop(pDeviceStateCoreAudio->audioUnitPlayback);
return result; /* Rerouting failed. */
}
wasReinitialized = MA_TRUE;
}
if (ma_atomic_bool32_get(&pDeviceStateCoreAudio->isSwitchingCaptureDevice)) {
result = ma_device_reinit_internal__coreaudio(pDevice, ma_device_type_capture, MA_TRUE);
ma_atomic_bool32_set(&pDeviceStateCoreAudio->isSwitchingCaptureDevice, MA_FALSE);
/* If we failed to switch devices stop the device outright. */
if (result != MA_SUCCESS) {
pContextStateCoreAudio->AudioOutputUnitStop(pDeviceStateCoreAudio->audioUnitCapture);
return result; /* Rerouting failed. */
}
wasReinitialized = MA_TRUE;
}