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ALSA: Ensure at least two periods are used for duplex mode.

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This commit is contained in:
David Reid
2026-01-13 10:37:25 +10:00
parent 98a23f9551
commit d1316a58cf
1 changed files with 17 additions and 2 deletions
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miniaudio.h
+17 -2
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@@ -29394,6 +29394,7 @@ static ma_result ma_device_init__alsa(ma_device* pDevice, const void* pDeviceBac
ma_device_config_alsa defaultConfigALSA;
ma_context_state_alsa* pContextStateALSA = ma_context_get_backend_state__alsa(ma_device_get_context(pDevice));
ma_device_type deviceType = ma_device_get_type(pDevice);
ma_result result;
int pollDescriptorCountPlayback = 0;
int pollDescriptorCountCapture = 0;
int resultALSA;
@@ -29415,7 +29416,14 @@ static ma_result ma_device_init__alsa(ma_device* pDevice, const void* pDeviceBac
}
if (deviceType == ma_device_type_capture || deviceType == ma_device_type_duplex) {
ma_result result = ma_device_init_by_type__alsa(ma_device_get_context(pDevice), pContextStateALSA, pDeviceStateALSA, pDeviceConfigALSA, pDescriptorCapture, ma_device_type_capture);
/* Duplex mode must have at least two periods. */
if (deviceType == ma_device_type_duplex) {
if (pDescriptorCapture->periodCount < 2) {
pDescriptorCapture->periodCount = 2;
}
}
result = ma_device_init_by_type__alsa(ma_device_get_context(pDevice), pContextStateALSA, pDeviceStateALSA, pDeviceConfigALSA, pDescriptorCapture, ma_device_type_capture);
if (result != MA_SUCCESS) {
ma_device_uninit_internal__alsa(pDevice, pDeviceStateALSA);
return result;
@@ -29430,7 +29438,14 @@ static ma_result ma_device_init__alsa(ma_device* pDevice, const void* pDeviceBac
}
if (deviceType == ma_device_type_playback || deviceType == ma_device_type_duplex) {
ma_result result = ma_device_init_by_type__alsa(ma_device_get_context(pDevice), pContextStateALSA, pDeviceStateALSA, pDeviceConfigALSA, pDescriptorPlayback, ma_device_type_playback);
/* Duplex mode must have at least two periods. */
if (deviceType == ma_device_type_duplex) {
if (pDescriptorPlayback->periodCount < 2) {
pDescriptorPlayback->periodCount = 2;
}
}
result = ma_device_init_by_type__alsa(ma_device_get_context(pDevice), pContextStateALSA, pDeviceStateALSA, pDeviceConfigALSA, pDescriptorPlayback, ma_device_type_playback);
if (result != MA_SUCCESS) {
ma_device_uninit_internal__alsa(pDevice, pDeviceStateALSA);
return result;