gchar *
gst_alsa_find_device_name (GstObject * obj, const gchar * device,
snd_pcm_t * handle, snd_pcm_stream_t stream)
{
gchar *ret = NULL;
if (device != NULL) {
gchar *dev, *comma;
gint devnum;
GST_LOG_OBJECT (obj, "Trying to get device name from string '%s'", device);
/* only want name:card bit, but not devices and subdevices */
dev = g_strdup (device);
if ((comma = strchr (dev, ','))) {
*comma = '\0';
devnum = atoi (comma + 1);
ret = gst_alsa_find_device_name_no_handle (obj, dev, devnum, stream);
}
g_free (dev);
}
if (ret == NULL && handle != NULL) {
snd_pcm_info_t *info;
GST_LOG_OBJECT (obj, "Trying to get device name from open handle");
snd_pcm_info_malloc (&info);
snd_pcm_info (handle, info);
ret = g_strdup (snd_pcm_info_get_name (info));
snd_pcm_info_free (info);
}
GST_LOG_OBJECT (obj, "Device name for device '%s': %s",
GST_STR_NULL (device), GST_STR_NULL (ret));
return ret;
}
void bg_alsa_create_card_parameters(bg_parameter_info_t * ret,
int record)
{
snd_ctl_card_info_t *info;
snd_ctl_t *handle;
snd_pcm_info_t *pcminfo;
snd_pcm_stream_t stream;
int err;
int card, dev;
stream = record ? SND_PCM_STREAM_CAPTURE : SND_PCM_STREAM_PLAYBACK;
ret->name = gavl_strdup("card");
ret->long_name = gavl_strdup(TRS("Card"));
ret->type = BG_PARAMETER_STRINGLIST;
snd_ctl_card_info_malloc(&info);
card = -1;
if (snd_card_next(&card) < 0 || card < 0)
{
bg_log(BG_LOG_ERROR, LOG_DOMAIN, "No soundcards found");
return;
}
/* Default is always supported */
ret->val_default.val_str = gavl_strdup("default");
append_card(ret, gavl_strdup("default"),
gavl_strdup(TRS("Default")));
while (card >= 0)
{
char name[32];
sprintf(name, "hw:%d", card);
if ((err = snd_ctl_open(&handle, name, 0)) < 0)
{
bg_log(BG_LOG_ERROR, LOG_DOMAIN,
"control open failed (%i): %s",
card, snd_strerror(err));
goto next_card;
}
if ((err = snd_ctl_card_info(handle, info)) < 0)
{
bg_log(BG_LOG_ERROR, LOG_DOMAIN,
"control hardware info failed (%i): %s",
card, snd_strerror(err));
snd_ctl_close(handle);
goto next_card;
}
dev = -1;
while (1)
{
char * name, *label;
snd_pcm_info_malloc(&pcminfo);
if (snd_ctl_pcm_next_device(handle, &dev)<0)
{
bg_log(BG_LOG_ERROR, LOG_DOMAIN, "snd_ctl_pcm_next_device failed");
snd_pcm_info_free(pcminfo);
break;
}
if (dev < 0)
{
snd_pcm_info_free(pcminfo);
break;
}
snd_pcm_info_set_device(pcminfo, dev);
snd_pcm_info_set_subdevice(pcminfo, 0);
snd_pcm_info_set_stream(pcminfo, stream);
if ((err = snd_ctl_pcm_info(handle, pcminfo)) < 0)
{
if (err != -ENOENT)
bg_log(BG_LOG_ERROR, LOG_DOMAIN,
"control digital audio info failed (%i): %s",
card, snd_strerror(err));
snd_pcm_info_free(pcminfo);
continue;
}
name = bg_sprintf("hw:%d,%d", card, dev);
label = gavl_strdup(snd_pcm_info_get_name(pcminfo));
append_card(ret, name, label);
snd_pcm_info_free(pcminfo);
}
snd_ctl_close(handle);
next_card:
if (snd_card_next(&card) < 0)
break;
}
snd_ctl_card_info_free(info);
}
// for each ALSA device, call iterator. userData is passed to the iterator
// returns total number of iterations
int iteratePCMDevices(DeviceIteratorPtr iterator, void* userData) {
int count = 0;
int subdeviceCount;
int card, dev, subDev;
char devname[16];
int err;
snd_ctl_t *handle;
snd_pcm_t *pcm;
snd_pcm_info_t* pcminfo;
snd_ctl_card_info_t *cardinfo, *defcardinfo = NULL;
UINT32 deviceID;
int doContinue = TRUE;
snd_pcm_info_malloc(&pcminfo);
snd_ctl_card_info_malloc(&cardinfo);
// 1st try "default" device
err = snd_pcm_open(&pcm, ALSA_DEFAULT_DEVICE_NAME,
SND_PCM_STREAM_PLAYBACK, SND_PCM_NONBLOCK);
if (err < 0) {
// try with the other direction
err = snd_pcm_open(&pcm, ALSA_DEFAULT_DEVICE_NAME,
SND_PCM_STREAM_CAPTURE, SND_PCM_NONBLOCK);
}
if (err < 0) {
ERROR1("ERROR: snd_pcm_open (\"default\"): %s\n", snd_strerror(err));
} else {
err = snd_pcm_info(pcm, pcminfo);
snd_pcm_close(pcm);
if (err < 0) {
ERROR1("ERROR: snd_pcm_info (\"default\"): %s\n",
snd_strerror(err));
} else {
// try to get card info
card = snd_pcm_info_get_card(pcminfo);
if (card >= 0) {
sprintf(devname, ALSA_HARDWARE_CARD, card);
if (snd_ctl_open(&handle, devname, SND_CTL_NONBLOCK) >= 0) {
if (snd_ctl_card_info(handle, cardinfo) >= 0) {
defcardinfo = cardinfo;
}
snd_ctl_close(handle);
}
}
// call callback function for the device
if (iterator != NULL) {
doContinue = (*iterator)(ALSA_DEFAULT_DEVICE_ID, pcminfo,
defcardinfo, userData);
}
count++;
}
}
// iterate cards
card = -1;
while (doContinue) {
if (snd_card_next(&card) < 0) {
break;
}
if (card < 0) {
break;
}
sprintf(devname, ALSA_HARDWARE_CARD, card);
TRACE1("Opening alsa device \"%s\"...\n", devname);
err = snd_ctl_open(&handle, devname, SND_CTL_NONBLOCK);
if (err < 0) {
ERROR2("ERROR: snd_ctl_open, card=%d: %s\n",
card, snd_strerror(err));
} else {
err = snd_ctl_card_info(handle, cardinfo);
if (err < 0) {
ERROR2("ERROR: snd_ctl_card_info, card=%d: %s\n",
card, snd_strerror(err));
} else {
dev = -1;
while (doContinue) {
if (snd_ctl_pcm_next_device(handle, &dev) < 0) {
ERROR0("snd_ctl_pcm_next_device\n");
}
if (dev < 0) {
break;
}
snd_pcm_info_set_device(pcminfo, dev);
snd_pcm_info_set_subdevice(pcminfo, 0);
snd_pcm_info_set_stream(pcminfo, SND_PCM_STREAM_PLAYBACK);
err = snd_ctl_pcm_info(handle, pcminfo);
if (err == -ENOENT) {
// try with the other direction
snd_pcm_info_set_stream(pcminfo, SND_PCM_STREAM_CAPTURE);
err = snd_ctl_pcm_info(handle, pcminfo);
}
if (err < 0) {
if (err != -ENOENT) {
ERROR2("ERROR: snd_ctl_pcm_info, card=%d: %s",
card, snd_strerror(err));
}
} else {
subdeviceCount = needEnumerateSubdevices(ALSA_PCM) ?
snd_pcm_info_get_subdevices_count(pcminfo) : 1;
if (iterator!=NULL) {
for (subDev = 0; subDev < subdeviceCount; subDev++) {
deviceID = encodeDeviceID(card, dev, subDev);
doContinue = (*iterator)(deviceID, pcminfo,
cardinfo, userData);
count++;
if (!doContinue) {
break;
}
}
} else {
count += subdeviceCount;
}
}
} // of while(doContinue)
}
snd_ctl_close(handle);
}
}
snd_ctl_card_info_free(cardinfo);
snd_pcm_info_free(pcminfo);
return count;
}
static void probe_devices(snd_pcm_stream_t stream, vector_DevMap *DeviceList)
{
const char *main_prefix = "plughw:";
snd_ctl_t *handle;
snd_ctl_card_info_t *info;
snd_pcm_info_t *pcminfo;
int card, err, dev;
DevMap entry;
clear_devlist(DeviceList);
snd_ctl_card_info_malloc(&info);
snd_pcm_info_malloc(&pcminfo);
AL_STRING_INIT(entry.name);
AL_STRING_INIT(entry.device_name);
al_string_copy_cstr(&entry.name, alsaDevice);
al_string_copy_cstr(&entry.device_name, GetConfigValue(NULL, "alsa", (stream==SND_PCM_STREAM_PLAYBACK) ?
"device" : "capture", "default"));
VECTOR_PUSH_BACK(*DeviceList, entry);
card = -1;
if((err=snd_card_next(&card)) < 0)
ERR("Failed to find a card: %s\n", snd_strerror(err));
ConfigValueStr(NULL, "alsa", prefix_name(stream), &main_prefix);
while(card >= 0)
{
const char *card_prefix = main_prefix;
const char *cardname, *cardid;
char name[256];
snprintf(name, sizeof(name), "hw:%d", card);
if((err = snd_ctl_open(&handle, name, 0)) < 0)
{
ERR("control open (hw:%d): %s\n", card, snd_strerror(err));
goto next_card;
}
if((err = snd_ctl_card_info(handle, info)) < 0)
{
ERR("control hardware info (hw:%d): %s\n", card, snd_strerror(err));
snd_ctl_close(handle);
goto next_card;
}
cardname = snd_ctl_card_info_get_name(info);
cardid = snd_ctl_card_info_get_id(info);
snprintf(name, sizeof(name), "%s-%s", prefix_name(stream), cardid);
ConfigValueStr(NULL, "alsa", name, &card_prefix);
dev = -1;
while(1)
{
const char *device_prefix = card_prefix;
const char *devname;
char device[128];
if(snd_ctl_pcm_next_device(handle, &dev) < 0)
ERR("snd_ctl_pcm_next_device failed\n");
if(dev < 0)
break;
snd_pcm_info_set_device(pcminfo, dev);
snd_pcm_info_set_subdevice(pcminfo, 0);
snd_pcm_info_set_stream(pcminfo, stream);
if((err = snd_ctl_pcm_info(handle, pcminfo)) < 0) {
if(err != -ENOENT)
ERR("control digital audio info (hw:%d): %s\n", card, snd_strerror(err));
continue;
}
devname = snd_pcm_info_get_name(pcminfo);
snprintf(name, sizeof(name), "%s-%s-%d", prefix_name(stream), cardid, dev);
ConfigValueStr(NULL, "alsa", name, &device_prefix);
snprintf(name, sizeof(name), "%s, %s (CARD=%s,DEV=%d)",
cardname, devname, cardid, dev);
snprintf(device, sizeof(device), "%sCARD=%s,DEV=%d",
device_prefix, cardid, dev);
TRACE("Got device \"%s\", \"%s\"\n", name, device);
AL_STRING_INIT(entry.name);
AL_STRING_INIT(entry.device_name);
al_string_copy_cstr(&entry.name, name);
al_string_copy_cstr(&entry.device_name, device);
VECTOR_PUSH_BACK(*DeviceList, entry);
}
snd_ctl_close(handle);
next_card:
if(snd_card_next(&card) < 0) {
ERR("snd_card_next failed\n");
break;
}
}
snd_pcm_info_free(pcminfo);
snd_ctl_card_info_free(info);
}
static DevMap *probe_devices(snd_pcm_stream_t stream, ALuint *count)
{
const char *main_prefix = "plughw:";
snd_ctl_t *handle;
int card, err, dev, idx;
snd_ctl_card_info_t *info;
snd_pcm_info_t *pcminfo;
DevMap *DevList;
snd_ctl_card_info_malloc(&info);
snd_pcm_info_malloc(&pcminfo);
DevList = malloc(sizeof(DevMap) * 1);
DevList[0].name = strdup(alsaDevice);
DevList[0].device = strdup(GetConfigValue("alsa", (stream==SND_PCM_STREAM_PLAYBACK) ?
"device" : "capture", "default"));
idx = 1;
card = -1;
if((err=snd_card_next(&card)) < 0)
ERR("Failed to find a card: %s\n", snd_strerror(err));
ConfigValueStr("alsa", prefix_name(stream), &main_prefix);
while(card >= 0)
{
const char *card_prefix = main_prefix;
const char *cardname, *cardid;
char name[256];
snprintf(name, sizeof(name), "hw:%d", card);
if((err = snd_ctl_open(&handle, name, 0)) < 0)
{
ERR("control open (hw:%d): %s\n", card, snd_strerror(err));
goto next_card;
}
if((err = snd_ctl_card_info(handle, info)) < 0)
{
ERR("control hardware info (hw:%d): %s\n", card, snd_strerror(err));
snd_ctl_close(handle);
goto next_card;
}
cardname = snd_ctl_card_info_get_name(info);
cardid = snd_ctl_card_info_get_id(info);
snprintf(name, sizeof(name), "%s-%s", prefix_name(stream), cardid);
ConfigValueStr("alsa", name, &card_prefix);
dev = -1;
while(1)
{
const char *devname;
void *temp;
if(snd_ctl_pcm_next_device(handle, &dev) < 0)
ERR("snd_ctl_pcm_next_device failed\n");
if(dev < 0)
break;
snd_pcm_info_set_device(pcminfo, dev);
snd_pcm_info_set_subdevice(pcminfo, 0);
snd_pcm_info_set_stream(pcminfo, stream);
if((err = snd_ctl_pcm_info(handle, pcminfo)) < 0) {
if(err != -ENOENT)
ERR("control digital audio info (hw:%d): %s\n", card, snd_strerror(err));
continue;
}
temp = realloc(DevList, sizeof(DevMap) * (idx+1));
if(temp)
{
const char *device_prefix = card_prefix;
char device[128];
DevList = temp;
devname = snd_pcm_info_get_name(pcminfo);
snprintf(name, sizeof(name), "%s-%s-%d", prefix_name(stream), cardid, dev);
ConfigValueStr("alsa", name, &device_prefix);
snprintf(name, sizeof(name), "%s, %s (CARD=%s,DEV=%d)",
cardname, devname, cardid, dev);
snprintf(device, sizeof(device), "%sCARD=%s,DEV=%d",
device_prefix, cardid, dev);
TRACE("Got device \"%s\", \"%s\"\n", name, device);
DevList[idx].name = strdup(name);
DevList[idx].device = strdup(device);
idx++;
}
}
snd_ctl_close(handle);
next_card:
if(snd_card_next(&card) < 0) {
ERR("snd_card_next failed\n");
break;
}
}
snd_pcm_info_free(pcminfo);
snd_ctl_card_info_free(info);
*count = idx;
return DevList;
}
static GList *
gst_alsa_get_device_list (snd_pcm_stream_t stream)
{
snd_ctl_t *handle;
int card, dev;
snd_ctl_card_info_t *info;
snd_pcm_info_t *pcminfo;
gboolean mixer = (stream == -1);
GList *list = NULL;
if (stream == -1)
stream = 0;
snd_ctl_card_info_malloc (&info);
snd_pcm_info_malloc (&pcminfo);
card = -1;
if (snd_card_next (&card) < 0 || card < 0) {
/* no soundcard found */
GST_WARNING ("No soundcard found");
goto beach;
}
while (card >= 0) {
gchar name[32];
g_snprintf (name, sizeof (name), "hw:%d", card);
if (snd_ctl_open (&handle, name, 0) < 0) {
goto next_card;
}
if (snd_ctl_card_info (handle, info) < 0) {
snd_ctl_close (handle);
goto next_card;
}
if (mixer) {
list = g_list_append (list, g_strdup (name));
} else {
dev = -1;
while (1) {
gchar *gst_device;
snd_ctl_pcm_next_device (handle, &dev);
if (dev < 0)
break;
snd_pcm_info_set_device (pcminfo, dev);
snd_pcm_info_set_subdevice (pcminfo, 0);
snd_pcm_info_set_stream (pcminfo, stream);
if (snd_ctl_pcm_info (handle, pcminfo) < 0) {
continue;
}
gst_device = g_strdup_printf ("hw:%d,%d", card, dev);
list = g_list_append (list, gst_device);
}
}
snd_ctl_close (handle);
next_card:
if (snd_card_next (&card) < 0) {
break;
}
}
beach:
snd_ctl_card_info_free (info);
snd_pcm_info_free (pcminfo);
return list;
}
/* returns the card name when the device number is unknown or -1 */
static gchar *
gst_alsa_find_device_name_no_handle (GstObject * obj, const gchar * devcard,
gint device_num, snd_pcm_stream_t stream)
{
snd_ctl_card_info_t *info = NULL;
snd_ctl_t *ctl = NULL;
gchar *ret = NULL;
gint dev = -1;
GST_LOG_OBJECT (obj, "[%s] device=%d", devcard, device_num);
if (snd_ctl_open (&ctl, devcard, 0) < 0)
return NULL;
snd_ctl_card_info_malloc (&info);
if (snd_ctl_card_info (ctl, info) < 0)
goto done;
if (device_num != -1) {
while (snd_ctl_pcm_next_device (ctl, &dev) == 0 && dev >= 0) {
if (dev == device_num) {
snd_pcm_info_t *pcminfo;
snd_pcm_info_malloc (&pcminfo);
snd_pcm_info_set_device (pcminfo, dev);
snd_pcm_info_set_subdevice (pcminfo, 0);
snd_pcm_info_set_stream (pcminfo, stream);
if (snd_ctl_pcm_info (ctl, pcminfo) < 0) {
snd_pcm_info_free (pcminfo);
break;
}
ret = (gchar *) snd_pcm_info_get_name (pcminfo);
if (ret) {
ret = g_strdup (ret);
GST_LOG_OBJECT (obj, "name from pcminfo: %s", ret);
}
snd_pcm_info_free (pcminfo);
if (ret)
break;
}
}
}
if (ret == NULL) {
char *name = NULL;
gint card;
GST_LOG_OBJECT (obj, "trying card name");
card = snd_ctl_card_info_get_card (info);
snd_card_get_name (card, &name);
ret = g_strdup (name);
free (name);
}
done:
snd_ctl_card_info_free (info);
snd_ctl_close (ctl);
return ret;
}
/* Try and find an IEC958 PCM device and mixer on card 0 and open it
* This function is only used on older ALSA installs that don't have the
* correct iec958 alias stuff set up, and relies on there being only
* one IEC958 PCM device (relies IEC958 in the device name) and one IEC958
* mixer control for doing the settings.
*/
static int
alsaspdifsink_find_pcm_device (AlsaSPDIFSink * sink)
{
int err = -1, dev, idx, count;
const gchar *ctl_name = "hw:0";
const gchar *spdif_name = SND_CTL_NAME_IEC958 ("", PLAYBACK, NONE);
int card = sink->card;
gchar pcm_name[24];
snd_pcm_t *pcm = NULL;
snd_ctl_t *ctl = NULL;
snd_ctl_card_info_t *info = NULL;
snd_ctl_elem_list_t *clist = NULL;
snd_ctl_elem_id_t *cid = NULL;
snd_pcm_info_t *pinfo = NULL;
GST_WARNING ("Opening IEC958 named device failed. Trying to autodetect");
if ((err = snd_ctl_open (&ctl, ctl_name, card)) < 0)
return err;
snd_ctl_card_info_malloc (&info);
snd_pcm_info_malloc (&pinfo);
/* Find a mixer for IEC958 settings */
snd_ctl_elem_list_malloc (&clist);
if ((err = snd_ctl_elem_list (ctl, clist)) < 0)
goto beach;
if ((err =
snd_ctl_elem_list_alloc_space (clist,
snd_ctl_elem_list_get_count (clist))) < 0)
goto beach;
if ((err = snd_ctl_elem_list (ctl, clist)) < 0)
goto beach;
count = snd_ctl_elem_list_get_used (clist);
for (idx = 0; idx < count; idx++) {
if (strstr (snd_ctl_elem_list_get_name (clist, idx), spdif_name) != NULL)
break;
}
if (idx == count) {
/* No SPDIF mixer availble */
err = 0;
goto beach;
}
snd_ctl_elem_id_malloc (&cid);
snd_ctl_elem_list_get_id (clist, idx, cid);
/* Now find a PCM device for IEC 958 */
if ((err = snd_ctl_card_info (ctl, info)) < 0)
goto beach;
dev = -1;
do {
if (snd_ctl_pcm_next_device (ctl, &dev) < 0)
goto beach;
if (dev < 0)
break; /* No more devices */
/* Filter for playback devices */
snd_pcm_info_set_device (pinfo, dev);
snd_pcm_info_set_subdevice (pinfo, 0);
snd_pcm_info_set_stream (pinfo, SND_PCM_STREAM_PLAYBACK);
if ((err = snd_ctl_pcm_info (ctl, pinfo)) < 0) {
if (err != -ENOENT)
goto beach; /* Genuine error */
/* Device has no playback streams */
continue;
}
if (strstr (snd_pcm_info_get_name (pinfo), "IEC958") == NULL)
continue; /* Not the device we are looking for */
count = snd_pcm_info_get_subdevices_count (pinfo);
GST_LOG_OBJECT (sink, "Device %d has %d subdevices\n", dev,
snd_pcm_info_get_subdevices_count (pinfo));
for (idx = 0; idx < count; idx++) {
snd_pcm_info_set_subdevice (pinfo, idx);
if ((err = snd_ctl_pcm_info (ctl, pinfo)) < 0)
goto beach;
g_assert (snd_pcm_info_get_stream (pinfo) == SND_PCM_STREAM_PLAYBACK);
GST_LOG_OBJECT (sink, "Found playback stream on dev %d sub-d %d\n", dev,
idx);
/* Found a suitable PCM device, let's open it */
g_snprintf (pcm_name, 24, "hw:%d,%d", card, dev);
if ((err =
snd_pcm_open (&(pcm), pcm_name, SND_PCM_STREAM_PLAYBACK, 0)) < 0)
goto beach;
break;
}
} while (pcm == NULL);
if (pcm != NULL) {
snd_ctl_elem_value_t *cval;
snd_aes_iec958_t iec958;
/* Have a PCM device and a mixer, set things up */
snd_ctl_elem_value_malloc (&cval);
snd_ctl_elem_value_set_id (cval, cid);
snd_ctl_elem_value_get_iec958 (cval, &iec958);
iec958.status[0] = IEC958_AES0_NONAUDIO;
iec958.status[1] = IEC958_AES1_CON_ORIGINAL | IEC958_AES1_CON_PCM_CODER;
iec958.status[2] = 0;
iec958.status[3] = IEC958_AES3_CON_FS_48000;
snd_ctl_elem_value_set_iec958 (cval, &iec958);
snd_ctl_elem_value_free (cval);
sink->pcm = pcm;
pcm = NULL;
err = 0;
}
beach:
if (pcm)
snd_pcm_close (pcm);
if (clist)
snd_ctl_elem_list_clear (clist);
if (ctl)
snd_ctl_close (ctl);
if (clist)
snd_ctl_elem_list_free (clist);
if (cid)
snd_ctl_elem_id_free (cid);
if (info)
snd_ctl_card_info_free (info);
if (pinfo)
snd_pcm_info_free (pinfo);
return err;
}
std::vector<ALSAInput::Source> ALSAInput::GetSourceList() {
std::vector<Source> list;
/*
This code is based on the ALSA device detection code used in PortAudio. I just ported it to C++ and improved it a bit.
All credit goes to the PortAudio devs, they saved me a lot of time :).
*/
// these ALSA plugins are blacklisted because they are always defined but rarely useful
// 'pulse' is also blacklisted because the native PulseAudio backend is more reliable
std::vector<std::string> plugin_blacklist = {
"cards", "default", "sysdefault", "hw", "plughw", "plug", "dmix", "dsnoop", "shm", "tee", "file", "null",
"front", "rear", "center_lfe", "side", "surround40", "surround41", "surround50", "surround51", "surround71",
"iec958", "spdif", "hdmi", "modem", "phoneline", "pulse",
};
std::sort(plugin_blacklist.begin(), plugin_blacklist.end());
// the 'default' PCM must be first, so add it explicitly
list.push_back(Source("default", "Default source"));
Logger::LogInfo("[ALSAInput::GetSourceList] " + Logger::tr("Generating source list ..."));
snd_ctl_card_info_t *alsa_card_info = NULL;
snd_pcm_info_t *alsa_pcm_info = NULL;
snd_ctl_t *alsa_ctl = NULL;
try {
// allocate card and PCM info structure
if(snd_ctl_card_info_malloc(&alsa_card_info) < 0) {
throw std::bad_alloc();
}
if(snd_pcm_info_malloc(&alsa_pcm_info) < 0) {
throw std::bad_alloc();
}
// update the ALSA configuration
snd_config_update_free_global();
if(snd_config_update() < 0) {
Logger::LogError("[ALSAInput::GetSourceList] " + Logger::tr("Error: Could not update ALSA configuration!"));
throw ALSAException();
}
// find all PCM plugins (by parsing the config file)
snd_config_t *alsa_config_pcms = NULL;
if(snd_config_search(snd_config, "pcm", &alsa_config_pcms) == 0) {
snd_config_iterator_t i, next;
snd_config_for_each(i, next, alsa_config_pcms) {
snd_config_t *alsa_config_pcm = snd_config_iterator_entry(i);
// get the name
const char *id = NULL;
if(snd_config_get_id(alsa_config_pcm, &id) < 0 || id == NULL)
continue;
std::string plugin_name = id;
// ignore the plugin if it is blacklisted
if(std::binary_search(plugin_blacklist.begin(), plugin_blacklist.end(), plugin_name))
continue;
// try to get the description
std::string plugin_description;
snd_config_t *alsa_config_description = NULL;
if(snd_config_search(alsa_config_pcm, "hint.description", &alsa_config_description) == 0) {
const char *str = NULL;
if(snd_config_get_string(alsa_config_description, &str) >= 0 && str != NULL) {
plugin_description = str;
}
}
// if there is no description, ignore it, because it's probably not meant to be used
if(plugin_description.empty())
continue;
// if there is no description, use the type instead
/*if(plugin_description.empty()) {
snd_config_t *alsa_config_type = NULL;
if(snd_config_search(alsa_config_pcm, "type", &alsa_config_type) >= 0) {
const char *str = NULL;
if(snd_config_get_string(alsa_config_type, &str) >= 0 && str != NULL) {
plugin_description = std::string(str) + " plugin";
}
}
}*/
// add to list
Logger::LogInfo("[ALSAInput::GetSourceList] " + Logger::tr("Found plugin: [%1] %2").arg(QString::fromStdString(plugin_name)).arg(QString::fromStdString(plugin_description)));
list.push_back(Source(plugin_name, plugin_description));
}
}
static DevMap *probe_devices(snd_pcm_stream_t stream, ALuint *count)
{
snd_ctl_t *handle;
int card, err, dev, idx;
snd_ctl_card_info_t *info;
snd_pcm_info_t *pcminfo;
DevMap *DevList;
char name[1024];
snd_ctl_card_info_malloc(&info);
snd_pcm_info_malloc(&pcminfo);
card = -1;
if((err=snd_card_next(&card)) < 0)
ERR("Failed to find a card: %s\n", snd_strerror(err));
DevList = malloc(sizeof(DevMap) * 1);
DevList[0].name = strdup("ALSA Default");
DevList[0].card = NULL;
DevList[0].dev = 0;
idx = 1;
while(card >= 0)
{
sprintf(name, "hw:%d", card);
if((err = snd_ctl_open(&handle, name, 0)) < 0)
{
ERR("control open (%i): %s\n", card, snd_strerror(err));
goto next_card;
}
if((err = snd_ctl_card_info(handle, info)) < 0)
{
ERR("control hardware info (%i): %s\n", card, snd_strerror(err));
snd_ctl_close(handle);
goto next_card;
}
dev = -1;
while(1)
{
const char *cname, *dname, *cid;
void *temp;
if(snd_ctl_pcm_next_device(handle, &dev) < 0)
ERR("snd_ctl_pcm_next_device failed\n");
if(dev < 0)
break;
snd_pcm_info_set_device(pcminfo, dev);
snd_pcm_info_set_subdevice(pcminfo, 0);
snd_pcm_info_set_stream(pcminfo, stream);
if((err = snd_ctl_pcm_info(handle, pcminfo)) < 0) {
if(err != -ENOENT)
ERR("control digital audio info (%i): %s\n", card, snd_strerror(err));
continue;
}
temp = realloc(DevList, sizeof(DevMap) * (idx+1));
if(temp)
{
DevList = temp;
cname = snd_ctl_card_info_get_name(info);
dname = snd_pcm_info_get_name(pcminfo);
cid = snd_ctl_card_info_get_id(info);
snprintf(name, sizeof(name), "%s, %s (CARD=%s,DEV=%d)",
cname, dname, cid, dev);
DevList[idx].name = strdup(name);
DevList[idx].card = strdup(cid);
DevList[idx].dev = dev;
idx++;
}
}
snd_ctl_close(handle);
next_card:
if(snd_card_next(&card) < 0) {
ERR("snd_card_next failed\n");
break;
}
}
snd_pcm_info_free(pcminfo);
snd_ctl_card_info_free(info);
*count = idx;
return DevList;
}
