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ext/alsa/: Improve device-name detection a bit, especially in the case where the device is not actually open (#405020...

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Original commit message from CVS:
Based on patch by: Julien Puydt <julien.puydt at laposte net>
* ext/alsa/gstalsa.c: (gst_alsa_find_device_name_no_handle),
(gst_alsa_find_device_name):
* ext/alsa/gstalsa.h:
* ext/alsa/gstalsasink.c: (gst_alsasink_get_property):
* ext/alsa/gstalsasrc.c: (gst_alsasrc_get_property):
Improve device-name detection a bit, especially in the case where
the device is not actually open (#405020, #405024). Move common code
into gstalsa.c instead of duplicating it.
This commit is contained in:
Julien Puydt 2007-02-08 15:43:26 +00:00 committed by Tim-Philipp Müller
parent b827e4d539
commit 880da4d8f1
5 changed files with 117 additions and 21 deletions
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14
ChangeLog
View file

@ -1,3 +1,16 @@
2007-02-08 Tim-Philipp Müller <tim at centricular dot net>
Based on patch by: Julien Puydt <julien.puydt at laposte net>
* ext/alsa/gstalsa.c: (gst_alsa_find_device_name_no_handle),
(gst_alsa_find_device_name):
* ext/alsa/gstalsa.h:
* ext/alsa/gstalsasink.c: (gst_alsasink_get_property):
* ext/alsa/gstalsasrc.c: (gst_alsasrc_get_property):
Improve device-name detection a bit, especially in the case where
the device is not actually open (#405020, #405024). Move common code
into gstalsa.c instead of duplicating it.
2007-02-07 Tim-Philipp Müller <tim at centricular dot net>
* gst/audioconvert/gstaudioconvert.c:
@ -144,7 +157,6 @@
Add small test for 32bit float <=> 64bit float conversion (works
only one way so far, 32=>64 produces structured noise).
>>>>>>> 1.3137
2007-02-02 Tim-Philipp Müller <tim at centricular dot net>
* gst/audioconvert/gstaudioconvert.c:

93
ext/alsa/gstalsa.c
View file

@ -389,3 +389,96 @@ subroutine_error:
return NULL;
}
}
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;
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 = g_strdup (snd_pcm_info_get_name (pcminfo));
snd_pcm_info_free (pcminfo);
GST_LOG_OBJECT (obj, "name from pcminfo: %s", GST_STR_NULL (ret));
}
}
if (ret == NULL) {
char *name = NULL;
gint card;
GST_LOG_OBJECT (obj, "no luck so far, trying backup");
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;
}
gchar *
gst_alsa_find_device_name (GstObject * obj, const gchar * device,
snd_pcm_t * handle, snd_pcm_stream_t stream)
{
gchar *ret = NULL;
if (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);
}
if (ret == NULL && 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);
}
GST_LOG_OBJECT (obj, "Device name for device '%s': %s",
GST_STR_NULL (device), GST_STR_NULL (ret));
return ret;
}

5
ext/alsa/gstalsa.h
View file

@ -39,4 +39,9 @@ GstCaps * gst_alsa_probe_supported_formats (GstObject * obj,
snd_pcm_t * handle,
const GstCaps * template_caps);
gchar * gst_alsa_find_device_name (GstObject * obj,
const gchar * device,
snd_pcm_t * handle,
snd_pcm_stream_t stream);
#endif /* __GST_ALSA_H__ */

13
ext/alsa/gstalsasink.c
View file

@ -253,16 +253,9 @@ gst_alsasink_get_property (GObject * object, guint prop_id,
g_value_set_string (value, sink->device);
break;
case PROP_DEVICE_NAME:
if (sink->handle) {
snd_pcm_info_t *info;
snd_pcm_info_malloc (&info);
snd_pcm_info (sink->handle, info);
g_value_set_string (value, snd_pcm_info_get_name (info));
snd_pcm_info_free (info);
} else {
g_value_set_string (value, NULL);
}
g_value_take_string (value,
gst_alsa_find_device_name (GST_OBJECT_CAST (sink),
sink->device, sink->handle, SND_PCM_STREAM_PLAYBACK));
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);

13
ext/alsa/gstalsasrc.c
View file

@ -265,16 +265,9 @@ gst_alsasrc_get_property (GObject * object, guint prop_id,
g_value_set_string (value, src->device);
break;
case PROP_DEVICE_NAME:
if (src->handle) {
snd_pcm_info_t *info;
snd_pcm_info_malloc (&info);
snd_pcm_info (src->handle, info);
g_value_set_string (value, snd_pcm_info_get_name (info));
snd_pcm_info_free (info);
} else {
g_value_set_string (value, NULL);
}
g_value_take_string (value,
gst_alsa_find_device_name (GST_OBJECT_CAST (src),
src->device, src->handle, SND_PCM_STREAM_CAPTURE));
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);