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alsa: add method to retrieve the card name

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Reuse an existing method to retrieve the card name.
This commit is contained in:
Wim Taymans 2010-08-18 16:42:13 +02:00
parent 1f19649695
commit 693919ff87
2 changed files with 34 additions and 19 deletions
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48
ext/alsa/gstalsa.c
View file

@ -462,6 +462,7 @@ subroutine_error:
}
}
/* 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)
@ -480,27 +481,29 @@ gst_alsa_find_device_name_no_handle (GstObject * obj, const gchar * devcard,
if (snd_ctl_card_info (ctl, info) < 0)
goto done;
while (snd_ctl_pcm_next_device (ctl, &dev) == 0 && dev >= 0) {
if (dev == device_num) {
snd_pcm_info_t *pcminfo;
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_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);
break;
if (ret)
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;
}
}
@ -508,7 +511,7 @@ gst_alsa_find_device_name_no_handle (GstObject * obj, const gchar * devcard,
char *name = NULL;
gint card;
GST_LOG_OBJECT (obj, "no luck so far, trying backup");
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);
@ -522,6 +525,13 @@ done:
return ret;
}
gchar *
gst_alsa_find_card_name (GstObject * obj, const gchar * devcard,
snd_pcm_stream_t stream)
{
return gst_alsa_find_device_name_no_handle (obj, devcard, -1, stream);
}
gchar *
gst_alsa_find_device_name (GstObject * obj, const gchar * device,
snd_pcm_t * handle, snd_pcm_stream_t stream)

5
ext/alsa/gstalsa.h
View file

@ -52,4 +52,9 @@ gchar * gst_alsa_find_device_name (GstObject * obj,
snd_pcm_t * handle,
snd_pcm_stream_t stream);
gchar * gst_alsa_find_card_name (GstObject * obj,
const gchar * devcard,
snd_pcm_stream_t stream);
#endif /* __GST_ALSA_H__ */