Commit 6fdb8262 authored by Viktor Peters's avatar Viktor Peters Committed by Tim-Philipp Müller
Browse files

ext/alsa/: Improve and fix mixer track handling, in particular better handling...

ext/alsa/: Improve and fix mixer track handling, in particular better handling of alsa's pvolume/pswitch/cvolume/cswi...

Original commit message from CVS:
Patch by: Viktor Peters  <viktor dot peters at gmail dot com>
* ext/alsa/gstalsamixer.c: (gst_alsa_mixer_ensure_track_list),
(gst_alsa_mixer_update), (gst_alsa_mixer_get_volume),
(gst_alsa_mixer_set_volume), (gst_alsa_mixer_set_mute),
(gst_alsa_mixer_set_record):
* ext/alsa/gstalsamixertrack.c:
(gst_alsa_mixer_track_update_alsa_capabilities),
(alsa_track_has_cap), (gst_alsa_mixer_track_new),
(gst_alsa_mixer_track_update):
* ext/alsa/gstalsamixertrack.h:
Improve and fix mixer track handling, in particular better handling
of alsa's pvolume/pswitch/cvolume/cswitch capabilities; create separate
track objects for tracks that have both capture and playback volume
(and label them differently as well so they're not mistakenly
assumed to be duplicates); classify mixer tracks that only affect
the audible volume of something (rather than the capture volume)
as playback tracks. Redefine/fix meaning of RECORD and MUTE flags
for capture tracks to correspond to alsa-pswitch alsa-cswitch
(following the meaning documented in the mixer interface header
file); add support for alsa's exclusive cswitch groups; update/sync
state/flags better if mixer settings are changed by another
application. Fixes #336075.
parent 83322013
2006-08-29 Tim-Philipp Müller <tim at centricular dot net>
Patch by: Viktor Peters <viktor dot peters at gmail dot com>
* ext/alsa/gstalsamixer.c: (gst_alsa_mixer_ensure_track_list),
(gst_alsa_mixer_update), (gst_alsa_mixer_get_volume),
(gst_alsa_mixer_set_volume), (gst_alsa_mixer_set_mute),
(gst_alsa_mixer_set_record):
* ext/alsa/gstalsamixertrack.c:
(gst_alsa_mixer_track_update_alsa_capabilities),
(alsa_track_has_cap), (gst_alsa_mixer_track_new),
(gst_alsa_mixer_track_update):
* ext/alsa/gstalsamixertrack.h:
Improve and fix mixer track handling, in particular better handling
of alsa's pvolume/pswitch/cvolume/cswitch capabilities; create separate
track objects for tracks that have both capture and playback volume
(and label them differently as well so they're not mistakenly
assumed to be duplicates); classify mixer tracks that only affect
the audible volume of something (rather than the capture volume)
as playback tracks. Redefine/fix meaning of RECORD and MUTE flags
for capture tracks to correspond to alsa-pswitch alsa-cswitch
(following the meaning documented in the mixer interface header
file); add support for alsa's exclusive cswitch groups; update/sync
state/flags better if mixer settings are changed by another
application. Fixes #336075.
2006-08-29 Tim-Philipp Müller <tim at centricular dot net>
 
* gst/playback/gstplaybin.c:
......
......@@ -123,8 +123,6 @@ gst_alsa_mixer_ensure_track_list (GstAlsaMixer * mixer)
{
gint i, count;
snd_mixer_elem_t *element;
GstMixerTrack *track;
GstMixerOptions *opts;
gboolean first = TRUE;
g_return_if_fail (mixer->handle != NULL);
......@@ -135,21 +133,20 @@ gst_alsa_mixer_ensure_track_list (GstAlsaMixer * mixer)
count = snd_mixer_get_count (mixer->handle);
element = snd_mixer_first_elem (mixer->handle);
/* build track list */
/* build track list
*
* Some ALSA tracks may have playback and capture capabilities.
* Here we model them as two separate GStreamer tracks.
*/
for (i = 0; i < count; i++) {
GstMixerTrack *play_track = NULL;
GstMixerTrack *cap_track = NULL;
const gchar *name;
GList *item;
gint channels = 0, samename = 0;
gint flags = GST_MIXER_TRACK_OUTPUT;
gboolean got_it = FALSE;
if (snd_mixer_selem_has_capture_switch (element)) {
if (!(mixer->dir & GST_ALSA_MIXER_CAPTURE))
goto next;
flags = GST_MIXER_TRACK_INPUT;
} else {
if (!(mixer->dir & GST_ALSA_MIXER_PLAYBACK))
goto next;
}
gint samename = 0;
name = snd_mixer_selem_get_name (element);
/* prevent dup names */
for (item = mixer->tracklist; item != NULL; item = item->next) {
......@@ -160,54 +157,82 @@ gst_alsa_mixer_ensure_track_list (GstAlsaMixer * mixer)
else
temp = GST_ALSA_MIXER_TRACK (item->data)->element;
if (!strcmp (snd_mixer_selem_get_name (element),
snd_mixer_selem_get_name (temp)))
if (strcmp (name, snd_mixer_selem_get_name (temp)) == 0)
samename++;
}
if (snd_mixer_selem_has_capture_volume (element)) {
while (snd_mixer_selem_has_capture_channel (element, channels))
channels++;
track = gst_alsa_mixer_track_new (element, samename,
i, channels, flags, GST_ALSA_MIXER_TRACK_CAPTURE);
mixer->tracklist = g_list_append (mixer->tracklist, track);
got_it = TRUE;
/* there might be another volume slider; make that playback */
flags &= ~GST_MIXER_TRACK_INPUT;
flags |= GST_MIXER_TRACK_OUTPUT;
}
GST_LOG ("[%s] probing element #%u, mixer->dir=%u", name, i, mixer->dir);
if (mixer->dir & GST_ALSA_MIXER_PLAYBACK) {
gboolean has_playback_switch, has_playback_volume;
has_playback_switch = snd_mixer_selem_has_playback_switch (element);
has_playback_volume = snd_mixer_selem_has_playback_volume (element);
GST_LOG ("[%s] PLAYBACK: has_playback_volume=%d, has_playback_switch=%d",
name, has_playback_volume, has_playback_switch);
if (has_playback_volume) {
gint flags = GST_MIXER_TRACK_OUTPUT;
if (snd_mixer_selem_has_playback_volume (element)) {
while (snd_mixer_selem_has_playback_channel (element, channels))
channels++;
if (first) {
first = FALSE;
flags |= GST_MIXER_TRACK_MASTER;
if (first) {
first = FALSE;
flags |= GST_MIXER_TRACK_MASTER;
}
play_track = gst_alsa_mixer_track_new (element, samename, i,
flags, FALSE, NULL, FALSE);
} else if (has_playback_switch) {
/* simple mute switch */
play_track = gst_alsa_mixer_track_new (element, samename, i,
GST_MIXER_TRACK_OUTPUT, TRUE, NULL, FALSE);
}
track = gst_alsa_mixer_track_new (element, samename,
i, channels, flags, GST_ALSA_MIXER_TRACK_PLAYBACK);
mixer->tracklist = g_list_append (mixer->tracklist, track);
got_it = TRUE;
}
if (snd_mixer_selem_is_enumerated (element)) {
opts = gst_alsa_mixer_options_new (element, i);
mixer->tracklist = g_list_append (mixer->tracklist, opts);
got_it = TRUE;
if (snd_mixer_selem_is_enumerated (element)) {
GstMixerOptions *opts = gst_alsa_mixer_options_new (element, i);
GST_LOG ("[%s] is enumerated (%d)", name, i);
mixer->tracklist = g_list_append (mixer->tracklist, opts);
}
}
if (!got_it) {
if (flags == GST_MIXER_TRACK_OUTPUT &&
snd_mixer_selem_has_playback_switch (element)) {
/* simple mute switch */
track = gst_alsa_mixer_track_new (element, samename,
i, 0, flags, GST_ALSA_MIXER_TRACK_PLAYBACK);
mixer->tracklist = g_list_append (mixer->tracklist, track);
if (mixer->dir & GST_ALSA_MIXER_CAPTURE) {
gboolean has_capture_switch, has_common_switch;
gboolean has_capture_volume, has_common_volume;
has_capture_switch = snd_mixer_selem_has_capture_switch (element);
has_common_switch = snd_mixer_selem_has_common_switch (element);
has_capture_volume = snd_mixer_selem_has_capture_volume (element);
has_common_volume = snd_mixer_selem_has_common_volume (element);
GST_LOG ("[%s] CAPTURE: has_capture_volume=%d, has_common_volume=%d, "
"has_capture_switch=%d, has_common_switch=%d, play_track=%p", name,
has_capture_volume, has_common_volume, has_capture_switch,
has_common_switch, play_track);
if (has_capture_volume && !(play_track && has_common_volume)) {
cap_track = gst_alsa_mixer_track_new (element, samename, i,
GST_MIXER_TRACK_INPUT, FALSE, NULL, play_track != NULL);
} else if (has_capture_switch && !(play_track && has_common_switch)) {
cap_track = gst_alsa_mixer_track_new (element, samename, i,
GST_MIXER_TRACK_INPUT, TRUE, NULL, play_track != NULL);
}
}
next:
if (play_track && cap_track) {
GST_ALSA_MIXER_TRACK (play_track)->shared_mute =
GST_ALSA_MIXER_TRACK (cap_track);
GST_ALSA_MIXER_TRACK (cap_track)->shared_mute =
GST_ALSA_MIXER_TRACK (play_track);
}
if (play_track)
mixer->tracklist = g_list_append (mixer->tracklist, play_track);
if (cap_track)
mixer->tracklist = g_list_append (mixer->tracklist, cap_track);
element = snd_mixer_elem_next (element);
}
}
......@@ -282,30 +307,13 @@ gst_alsa_mixer_list_tracks (GstAlsaMixer * mixer)
static void
gst_alsa_mixer_update (GstAlsaMixer * mixer, GstAlsaMixerTrack * alsa_track)
{
GstMixerTrack *track = (GstMixerTrack *) alsa_track;
int v = 0;
snd_mixer_handle_events (mixer->handle);
if (!alsa_track)
return;
/* Any updates in flags? */
if (snd_mixer_selem_has_playback_switch (alsa_track->element)) {
snd_mixer_selem_get_playback_switch (alsa_track->element, 0, &v);
if (v)
track->flags &= ~GST_MIXER_TRACK_MUTE;
else
track->flags |= GST_MIXER_TRACK_MUTE;
}
if (alsa_track->alsa_flags & GST_ALSA_MIXER_TRACK_CAPTURE) {
snd_mixer_selem_get_capture_switch (alsa_track->element, 0, &v);
if (!v)
track->flags &= ~GST_MIXER_TRACK_RECORD;
else
track->flags |= GST_MIXER_TRACK_RECORD;
}
if (alsa_track)
gst_alsa_mixer_track_update (alsa_track);
}
void
gst_alsa_mixer_get_volume (GstAlsaMixer * mixer, GstMixerTrack * track,
gint * volumes)
......@@ -317,21 +325,36 @@ gst_alsa_mixer_get_volume (GstAlsaMixer * mixer, GstMixerTrack * track,
gst_alsa_mixer_update (mixer, alsa_track);
if (track->flags & GST_MIXER_TRACK_MUTE &&
!snd_mixer_selem_has_playback_switch (alsa_track->element)) {
for (i = 0; i < track->num_channels; i++)
volumes[i] = alsa_track->volumes[i];
} else {
for (i = 0; i < track->num_channels; i++) {
long tmp = 0;
if (track->flags & GST_MIXER_TRACK_OUTPUT) { /* return playback volume */
/* Is emulated mute flag activated? */
if (track->flags & GST_MIXER_TRACK_MUTE &&
!(alsa_track->alsa_flags & GST_ALSA_MIXER_TRACK_PSWITCH)) {
for (i = 0; i < track->num_channels; i++)
volumes[i] = alsa_track->volumes[i];
} else {
for (i = 0; i < track->num_channels; i++) {
long tmp = 0;
if (alsa_track->alsa_flags & GST_ALSA_MIXER_TRACK_PLAYBACK) {
snd_mixer_selem_get_playback_volume (alsa_track->element, i, &tmp);
} else if (alsa_track->alsa_flags & GST_ALSA_MIXER_TRACK_CAPTURE) {
snd_mixer_selem_get_capture_volume (alsa_track->element, i, &tmp);
alsa_track->volumes[i] = volumes[i] = (gint) tmp;
}
}
} else if (track->flags & GST_MIXER_TRACK_INPUT) { /* return capture volume */
/* Is emulated record flag activated? */
if (alsa_track->alsa_flags & GST_ALSA_MIXER_TRACK_CSWITCH ||
track->flags & GST_MIXER_TRACK_RECORD) {
for (i = 0; i < track->num_channels; i++) {
long tmp = 0;
alsa_track->volumes[i] = volumes[i] = (gint) tmp;
snd_mixer_selem_get_capture_volume (alsa_track->element, i, &tmp);
alsa_track->volumes[i] = volumes[i] = (gint) tmp;
}
} else {
for (i = 0; i < track->num_channels; i++)
volumes[i] = alsa_track->volumes[i];
}
}
}
......@@ -340,27 +363,41 @@ void
gst_alsa_mixer_set_volume (GstAlsaMixer * mixer, GstMixerTrack * track,
gint * volumes)
{
gint i;
GstAlsaMixerTrack *alsa_track = GST_ALSA_MIXER_TRACK (track);
gint i;
g_return_if_fail (mixer->handle != NULL);
gst_alsa_mixer_update (mixer, alsa_track);
/* only set the volume with ALSA lib if the track isn't muted. */
for (i = 0; i < track->num_channels; i++) {
alsa_track->volumes[i] = volumes[i];
if (track->flags & GST_MIXER_TRACK_OUTPUT) {
if (!(track->flags & GST_MIXER_TRACK_MUTE) ||
snd_mixer_selem_has_playback_switch (alsa_track->element)) {
if (alsa_track->alsa_flags & GST_ALSA_MIXER_TRACK_PLAYBACK) {
/* Is emulated mute flag activated? */
if (track->flags & GST_MIXER_TRACK_MUTE &&
!(alsa_track->alsa_flags & GST_ALSA_MIXER_TRACK_PSWITCH)) {
for (i = 0; i < track->num_channels; i++)
alsa_track->volumes[i] = volumes[i];
} else {
for (i = 0; i < track->num_channels; i++) {
alsa_track->volumes[i] = volumes[i];
snd_mixer_selem_set_playback_volume (alsa_track->element, i,
(long) volumes[i]);
} else if (alsa_track->alsa_flags & GST_ALSA_MIXER_TRACK_CAPTURE) {
snd_mixer_selem_set_capture_volume (alsa_track->element, i,
(long) volumes[i]);
volumes[i]);
}
}
} else if (track->flags & GST_MIXER_TRACK_INPUT) {
/* Is emulated record flag activated? */
if (track->flags & GST_MIXER_TRACK_RECORD ||
alsa_track->alsa_flags & GST_ALSA_MIXER_TRACK_CSWITCH) {
for (i = 0; i < track->num_channels; i++) {
alsa_track->volumes[i] = volumes[i];
snd_mixer_selem_set_capture_volume (alsa_track->element, i, volumes[i]);
}
} else {
for (i = 0; i < track->num_channels; i++)
alsa_track->volumes[i] = volumes[i];
}
}
}
......@@ -368,30 +405,46 @@ void
gst_alsa_mixer_set_mute (GstAlsaMixer * mixer, GstMixerTrack * track,
gboolean mute)
{
gint i;
GstAlsaMixerTrack *alsa_track = GST_ALSA_MIXER_TRACK (track);
g_return_if_fail (mixer->handle != NULL);
gst_alsa_mixer_update (mixer, alsa_track);
if (!!(mute) == !!(track->flags & GST_MIXER_TRACK_MUTE))
return;
if (mute) {
track->flags |= GST_MIXER_TRACK_MUTE;
if (alsa_track->shared_mute)
((GstMixerTrack *) (alsa_track->shared_mute))->flags |=
GST_MIXER_TRACK_MUTE;
} else {
track->flags &= ~GST_MIXER_TRACK_MUTE;
if (alsa_track->shared_mute)
((GstMixerTrack *) (alsa_track->shared_mute))->flags &=
~GST_MIXER_TRACK_MUTE;
}
if (snd_mixer_selem_has_playback_switch (alsa_track->element)) {
if (alsa_track->alsa_flags & GST_ALSA_MIXER_TRACK_PSWITCH) {
snd_mixer_selem_set_playback_switch_all (alsa_track->element, mute ? 0 : 1);
} else {
for (i = 0; i < track->num_channels; i++) {
long vol = mute ? 0 : alsa_track->volumes[i];
gint i;
GstAlsaMixerTrack *ctrl_track;
if (alsa_track->alsa_flags & GST_ALSA_MIXER_TRACK_CAPTURE) {
snd_mixer_selem_set_capture_volume (alsa_track->element, i, vol);
} else if (alsa_track->alsa_flags & GST_ALSA_MIXER_TRACK_PLAYBACK) {
snd_mixer_selem_set_playback_volume (alsa_track->element, i, vol);
}
if ((track->flags & GST_MIXER_TRACK_INPUT)
&& alsa_track->shared_mute != NULL)
ctrl_track = alsa_track->shared_mute;
else
ctrl_track = alsa_track;
for (i = 0; i < ((GstMixerTrack *) ctrl_track)->num_channels; i++) {
long vol =
mute ? ((GstMixerTrack *) ctrl_track)->min_volume : ctrl_track->
volumes[i];
snd_mixer_selem_set_playback_volume (ctrl_track->element, i, vol);
}
}
}
......@@ -406,13 +459,45 @@ gst_alsa_mixer_set_record (GstAlsaMixer * mixer,
gst_alsa_mixer_update (mixer, alsa_track);
if (!!(record) == !!(track->flags & GST_MIXER_TRACK_RECORD))
return;
if (record) {
track->flags |= GST_MIXER_TRACK_RECORD;
} else {
track->flags &= ~GST_MIXER_TRACK_RECORD;
}
snd_mixer_selem_set_capture_switch_all (alsa_track->element, record ? 1 : 0);
if (alsa_track->alsa_flags & GST_ALSA_MIXER_TRACK_CSWITCH) {
snd_mixer_selem_set_capture_switch_all (alsa_track->element,
record ? 1 : 0);
/* update all tracks in same exlusive cswitch group */
if (alsa_track->alsa_flags & GST_ALSA_MIXER_TRACK_CSWITCH_EXCL) {
GList *item;
for (item = mixer->tracklist; item != NULL; item = item->next) {
if (GST_IS_ALSA_MIXER_TRACK (item->data)) {
GstAlsaMixerTrack *item_alsa_track =
GST_ALSA_MIXER_TRACK (item->data);
if (item_alsa_track->alsa_flags & GST_ALSA_MIXER_TRACK_CSWITCH_EXCL &&
item_alsa_track->capture_group == alsa_track->capture_group) {
gst_alsa_mixer_update (mixer, item_alsa_track);
}
}
}
}
} else {
gint i;
for (i = 0; i < track->num_channels; i++) {
long vol = record ? alsa_track->volumes[i] : track->min_volume;
snd_mixer_selem_set_capture_volume (alsa_track->element, i, vol);
}
}
}
void
......
......@@ -68,10 +68,57 @@ gst_alsa_mixer_track_init (GstAlsaMixerTrack * alsa_track)
{
}
static void
gst_alsa_mixer_track_update_alsa_capabilities (GstAlsaMixerTrack * alsa_track)
{
alsa_track->alsa_flags = 0;
alsa_track->capture_group = -1;
if (snd_mixer_selem_has_common_volume (alsa_track->element))
alsa_track->alsa_flags |= GST_ALSA_MIXER_TRACK_VOLUME;
if (snd_mixer_selem_has_playback_volume (alsa_track->element))
alsa_track->alsa_flags |= GST_ALSA_MIXER_TRACK_PVOLUME;
if (snd_mixer_selem_has_capture_volume (alsa_track->element))
alsa_track->alsa_flags |= GST_ALSA_MIXER_TRACK_CVOLUME;
if (snd_mixer_selem_has_common_switch (alsa_track->element))
alsa_track->alsa_flags |= GST_ALSA_MIXER_TRACK_SWITCH;
if (snd_mixer_selem_has_playback_switch (alsa_track->element))
alsa_track->alsa_flags |= GST_ALSA_MIXER_TRACK_PSWITCH;
if (snd_mixer_selem_has_capture_switch (alsa_track->element)) {
alsa_track->alsa_flags |= GST_ALSA_MIXER_TRACK_CSWITCH;
if (snd_mixer_selem_has_capture_switch_exclusive (alsa_track->element)) {
alsa_track->alsa_flags |= GST_ALSA_MIXER_TRACK_CSWITCH_EXCL;
alsa_track->capture_group =
snd_mixer_selem_get_capture_group (alsa_track->element);
}
}
GST_LOG ("[%s] alsa_flags=0x%08x, capture_group=%d",
snd_mixer_selem_get_name (alsa_track->element),
alsa_track->alsa_flags, alsa_track->capture_group);
}
inline static gboolean
alsa_track_has_cap (GstAlsaMixerTrack * alsa_track, guint32 flag)
{
return ((alsa_track->alsa_flags & flag) != 0);
}
GstMixerTrack *
gst_alsa_mixer_track_new (snd_mixer_elem_t * element,
gint num, gint track_num, gint channels, gint flags, gint alsa_flags)
gint num, gint track_num, gint flags, gboolean sw,
GstAlsaMixerTrack * shared_mute_track, gboolean append_capture)
{
GstAlsaMixerTrack *alsa_track;
GstMixerTrack *track;
const gchar *name;
const gchar *label;
gint i;
long min = 0, max = 0;
const struct
......@@ -93,71 +140,177 @@ gst_alsa_mixer_track_new (snd_mixer_elem_t * element,
"Capture", N_("Capture")}
};
GstMixerTrack *track = g_object_new (GST_ALSA_MIXER_TRACK_TYPE, NULL);
GstAlsaMixerTrack *alsa_track = (GstAlsaMixerTrack *) track;
name = snd_mixer_selem_get_name (element);
/* set basic information */
if (num == 0)
track->label = g_strdup (snd_mixer_selem_get_name (element));
GST_LOG ("[%s] num=%d,track_num=%d,flags=0x%08x,sw=%s,shared_mute_track=%p",
name, num, track_num, flags, (sw) ? "true" : "false", shared_mute_track);
track = (GstMixerTrack *) g_object_new (GST_ALSA_MIXER_TRACK_TYPE, NULL);
alsa_track = (GstAlsaMixerTrack *) track;
GST_LOG ("[%s] created new mixer track %p", name, track);
/* This reflects the assumptions used for GstAlsaMixerTrack */
if (!(!!(flags & GST_MIXER_TRACK_OUTPUT) ^ !!(flags & GST_MIXER_TRACK_INPUT))) {
GST_ERROR ("Mixer track must be either output or input!");
g_return_val_if_reached (NULL);
}
track->flags = flags;
alsa_track->element = element;
alsa_track->shared_mute = shared_mute_track;
alsa_track->track_num = track_num;
alsa_track->alsa_channels = 0;
gst_alsa_mixer_track_update_alsa_capabilities (alsa_track);
if (flags & GST_MIXER_TRACK_OUTPUT) {
while (alsa_track->alsa_channels < GST_ALSA_MAX_CHANNELS &&
snd_mixer_selem_has_playback_channel (element,
alsa_track->alsa_channels)) {
alsa_track->alsa_channels++;
}
GST_LOG ("[%s] %d output channels", name, alsa_track->alsa_channels);
} else if (flags & GST_MIXER_TRACK_INPUT) {
while (alsa_track->alsa_channels < GST_ALSA_MAX_CHANNELS &&
snd_mixer_selem_has_capture_channel (element,
alsa_track->alsa_channels)) {
alsa_track->alsa_channels++;
}
GST_LOG ("[%s] %d input channels", name, alsa_track->alsa_channels);
} else {
g_assert_not_reached ();
}
if (sw)
track->num_channels = 0;
else
track->label = g_strdup_printf ("%s %d",
snd_mixer_selem_get_name (element), num + 1);
track->num_channels = alsa_track->alsa_channels;
/* translate the name if we can */
label = name;
for (i = 0; i < G_N_ELEMENTS (alsa_track_labels); ++i) {
if (!g_utf8_collate (snd_mixer_selem_get_name (element),
alsa_track_labels[i].orig)) {
g_free (track->label);
if (num == 0)
track->label = g_strdup (_(alsa_track_labels[i].trans));
else
track->label = g_strdup_printf ("%s %d",
_(alsa_track_labels[i].trans), num);
if (g_utf8_collate (label, alsa_track_labels[i].orig) == 0) {
label = _(alsa_track_labels[i].trans);
break;
}
}
track->num_channels = channels;
track->flags = flags;
alsa_track->element = element;
alsa_track->alsa_flags = alsa_flags;
alsa_track->track_num = track_num;
if (num == 0) {
track->label = g_strdup_printf ("%s%s%s", label,
append_capture ? " " : "", append_capture ? _("Capture") : "");
} else {
track->label = g_strdup_printf ("%s%s%s %d", label,
append_capture ? " " : "", append_capture ? _("Capture") : "", num);
}
/* set volume information */
if (channels) {
if (alsa_flags & GST_ALSA_MIXER_TRACK_PLAYBACK) {
if (track->num_channels > 0) {
if ((flags & GST_MIXER_TRACK_OUTPUT))
snd_mixer_selem_get_playback_volume_range (element, &min, &max);
} else if (alsa_flags & GST_ALSA_MIXER_TRACK_CAPTURE) {
else
snd_mixer_selem_get_capture_volume_range (element, &min, &max);
}
}
track->min_volume = (gint) min;
track->max_volume = (gint) max;
for (i = 0; i < channels; i++) {
for (i = 0; i < track->num_channels; i++) {
long tmp = 0;
if (alsa_flags & GST_ALSA_MIXER_TRACK_PLAYBACK) {
if (flags & GST_MIXER_TRACK_OUTPUT)
snd_mixer_selem_get_playback_volume (element, i, &tmp);
} else if (alsa_flags & GST_ALSA_MIXER_TRACK_CAPTURE) {
else
snd_mixer_selem_get_capture_volume (element, i, &tmp);
}
alsa_track->volumes[i] = (gint) tmp;
}
if (snd_mixer_selem_has_playback_switch (element)) {
int val = 1;
gst_alsa_mixer_track_update (alsa_track);
return track;
}
void
gst_alsa_mixer_track_update (GstAlsaMixerTrack * alsa_track)