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audio4: Try improving default channel and sample rate detection.

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This commit is contained in:
David Reid
2023-03-19 20:07:05 +10:00
parent f9807bee71
commit 17744f69c2
1 changed files with 41 additions and 3 deletions
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miniaudio.h
+41 -3
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@@ -36007,8 +36007,13 @@ static ma_result ma_device_init_fd__audio4(ma_device* pDevice, const ma_device_c
"/dev/audio",
"/dev/audio0"
};
const char* pDefaultDeviceCtlNames[] = {
"/dev/audioctl",
"/dev/audioctl0"
};
int fd;
int fdFlags = 0;
size_t iDefaultDevice = (size_t)-1;
ma_format internalFormat;
ma_uint32 internalChannels;
ma_uint32 internalSampleRate;
@@ -36027,11 +36032,11 @@ static ma_result ma_device_init_fd__audio4(ma_device* pDevice, const ma_device_c
}
/*fdFlags |= O_NONBLOCK;*/
/* Find the index of the default device as a start. We'll use this index later. Set it to (size_t)-1 otherwise. */
if (pDescriptor->pDeviceID == NULL) {
/* Default device. */
size_t iDevice;
for (iDevice = 0; iDevice < ma_countof(pDefaultDeviceNames); ++iDevice) {
fd = open(pDefaultDeviceNames[iDevice], fdFlags, 0);
for (iDefaultDevice = 0; iDefaultDevice < ma_countof(pDefaultDeviceNames); ++iDefaultDevice) {
fd = open(pDefaultDeviceNames[iDefaultDevice], fdFlags, 0);
if (fd != -1) {
break;
}
@@ -36039,6 +36044,16 @@ static ma_result ma_device_init_fd__audio4(ma_device* pDevice, const ma_device_c
} else {
/* Specific device. */
fd = open(pDescriptor->pDeviceID->audio4, fdFlags, 0);
for (iDefaultDevice = 0; iDefaultDevice < ma_countof(pDefaultDeviceNames); iDefaultDevice += 1) {
if (ma_strcmp(pDefaultDeviceNames[iDefaultDevice], pDescriptor->pDeviceID->audio4) == 0) {
break;
}
}
if (iDefaultDevice == ma_countof(pDefaultDeviceNames)) {
iDefaultDevice = (size_t)-1;
}
}
if (fd == -1) {
@@ -36049,6 +36064,7 @@ static ma_result ma_device_init_fd__audio4(ma_device* pDevice, const ma_device_c
#if !defined(MA_AUDIO4_USE_NEW_API) /* Old API */
{
audio_info_t fdInfo;
int fdInfoResult = -1;
/*
The documentation is a little bit unclear to me as to how it handles formats. It says the
@@ -36068,6 +36084,28 @@ static ma_result ma_device_init_fd__audio4(ma_device* pDevice, const ma_device_c
*/
AUDIO_INITINFO(&fdInfo);
/*
Get the default format from the audioctl file if we're asking for a default device. If we
retrieve it from /dev/audio it'll default to mono 8000Hz.
*/
if (iDefaultDevice != (size_t)-1) {
/* We're using a default device. Get the info from the /dev/audioctl file instead of /dev/audio. */
int fdctl = open(pDefaultDeviceCtlNames[iDefaultDevice], fdFlags, 0);
if (fdctl != -1) {
fdInfoResult = ioctl(fdctl, AUDIO_GETINFO, &fdInfo);
close(fdctl);
}
}
if (fdInfoResult == -1) {
/* We still don't have the default device info so just retrieve it from the main audio device. */
if (ioctl(fd, AUDIO_GETINFO, &fdInfo) < 0) {
close(fd);
ma_log_post(ma_device_get_log(pDevice), MA_LOG_LEVEL_ERROR, "[audio4] AUDIO_GETINFO failed.");
return ma_result_from_errno(errno);
}
}
/* We get the driver to do as much of the data conversion as possible. */
if (deviceType == ma_device_type_capture) {
fdInfo.mode = AUMODE_RECORD;