Menu
▾
▴
[gst-cvs] lmjohns3 gst-plugins: gst-plugins/ext/alsa/
|
From: Leif J. <lmj...@us...> - 2003-11-16 21:57:24
|
CVS Root: /cvsroot/gstreamer
Module: gst-plugins
Changes by: lmjohns3
Date: Sun Nov 16 2003 13:56:42 PST
Log message:
+ adding alsa mixer implementation
Modified files:
ext/alsa : Makefile.am
Added files:
ext/alsa : gstalsamixer.c gstalsamixer.h
Links:
http://cvs.sf.net/cgi-bin/viewcvs.cgi/gstreamer/gst-plugins/ext/alsa/Makefile.am.diff?r1=1.11&r2=1.12
http://cvs.sf.net/cgi-bin/viewcvs.cgi/gstreamer/gst-plugins/ext/alsa/gstalsamixer.c?rev=1.1&content-type=text/vnd.viewcvs-markup
http://cvs.sf.net/cgi-bin/viewcvs.cgi/gstreamer/gst-plugins/ext/alsa/gstalsamixer.h?rev=1.1&content-type=text/vnd.viewcvs-markup
====Begin Diffs====
Index: Makefile.am
===================================================================
RCS file: /cvsroot/gstreamer/gst-plugins/ext/alsa/Makefile.am,v
retrieving revision 1.11
retrieving revision 1.12
diff -u -d -r1.11 -r1.12
--- Makefile.am 16 Nov 2003 00:40:01 -0000 1.11
+++ Makefile.am 16 Nov 2003 21:56:30 -0000 1.12
@@ -2,13 +2,13 @@
plugin_LTLIBRARIES = libgstalsa.la
libgstalsa_la_SOURCES = gstalsaplugin.c \
- gstalsa.c gstalsaclock.c gstalsasink.c gstalsasrc.c
+ gstalsa.c gstalsaclock.c gstalsasink.c gstalsasrc.c gstalsamixer.c
libgstalsa_la_CFLAGS = $(GST_CFLAGS) $(ALSA_CFLAGS)
libgstalsa_la_LIBADD = $(ALSA_LIBS)
libgstalsa_la_LDFLAGS = $(GST_PLUGIN_LDFLAGS)
noinst_HEADERS = \
- gstalsa.h gstalsaclock.h gstalsasink.h gstalsasrc.h
+ gstalsa.h gstalsaclock.h gstalsasink.h gstalsasrc.h gstalsamixer.h
EXTRA_DIST = README
--- NEW FILE: gstalsamixer.c ---
/* GStreamer ALSA mixer implementation
* Copyright (C) 2003 Leif Johnson <le...@am...>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "gstalsamixer.h"
static gboolean gst_alsa_mixer_supported (GstInterface *iface,
GType iface_type);
static const GList * gst_alsa_mixer_list_tracks (GstMixer *mixer);
static void gst_alsa_mixer_set_volume (GstMixer *mixer,
GstMixerTrack *track,
gint *volumes);
static void gst_alsa_mixer_get_volume (GstMixer *mixer,
GstMixerTrack *track,
gint *volumes);
static void gst_alsa_mixer_set_record (GstMixer *mixer,
GstMixerTrack *track,
gboolean record);
static void gst_alsa_mixer_set_mute (GstMixer *mixer,
GstMixerTrack *track,
gboolean mute);
GstMixerTrack *
gst_alsa_mixer_track_new (GstAlsa *alsa,
gint track_num,
gint channels,
gint flags)
{
gint i;
long min, max;
snd_mixer_elem_t *element = NULL;
GstMixerTrack *track = (GstMixerTrack *) g_new (GstAlsaMixerTrack, 1);
GstAlsaMixerTrack *alsa_track = (GstAlsaMixerTrack *) track;
/* find a pointer to the track_num-th element in the mixer. */
i = 0;
element = snd_mixer_first_elem(alsa->mixer_handle);
while (i++ < track_num) element = snd_mixer_elem_next(element);
/* set basic information */
track->label = g_strdup_printf("%s", snd_mixer_selem_get_name(element));
track->num_channels = channels;
track->flags = flags;
alsa_track->element = element;
alsa_track->track_num = track_num;
/* set volume information */
snd_mixer_selem_get_playback_volume_range(element, &min, &max);
track->min_volume = (gint) min;
track->max_volume = (gint) max;
snd_mixer_selem_get_capture_volume_range(element, &min, &max);
alsa_track->min_rec_volume = (gint) min;
alsa_track->max_rec_volume = (gint) max;
for (i = 0; i < channels; i++) {
long tmp;
if (snd_mixer_selem_has_playback_channel(element, i)) {
snd_mixer_selem_get_playback_volume(element, i, &tmp);
alsa_track->volumes[i] = (gint) tmp;
} else if (snd_mixer_selem_has_capture_channel(element, i)) {
snd_mixer_selem_get_capture_volume(element, i, &tmp);
alsa_track->volumes[i] = (gint) tmp;
}
}
return track;
}
void
gst_alsa_mixer_track_free (GstMixerTrack *track)
{
g_free (track->label);
g_free (track);
}
void
gst_alsa_interface_init (GstInterfaceClass *klass)
{
/* default virtual functions */
klass->supported = gst_alsa_mixer_supported;
}
void
gst_alsa_mixer_interface_init (GstMixerClass *klass)
{
/* default virtual functions */
klass->list_tracks = gst_alsa_mixer_list_tracks;
klass->set_volume = gst_alsa_mixer_set_volume;
klass->get_volume = gst_alsa_mixer_get_volume;
klass->set_mute = gst_alsa_mixer_set_mute;
klass->set_record = gst_alsa_mixer_set_record;
}
static gboolean
gst_alsa_mixer_supported (GstInterface *iface, GType iface_type)
{
g_assert (iface_type == GST_TYPE_MIXER);
return (((gint) GST_ALSA (iface)->mixer_handle) != -1);
}
static const GList *
gst_alsa_mixer_list_tracks (GstMixer *mixer)
{
GstAlsa *alsa = GST_ALSA (mixer);
g_return_val_if_fail (((gint) alsa->mixer_handle) != -1, NULL);
return (const GList *) GST_ALSA (mixer)->tracklist;
}
static void
gst_alsa_mixer_get_volume (GstMixer *mixer,
GstMixerTrack *track,
gint *volumes)
{
gint i;
GstAlsa *alsa = GST_ALSA (mixer);
GstAlsaMixerTrack *alsa_track = (GstAlsaMixerTrack *) track;
g_return_if_fail (((gint) alsa->mixer_handle) != -1);
if (track->flags & GST_MIXER_TRACK_MUTE) {
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;
if (snd_mixer_selem_has_playback_channel(alsa_track->element, i)) {
snd_mixer_selem_get_playback_volume(alsa_track->element, i, &tmp);
volumes[i] = (gint) tmp;
} else if (snd_mixer_selem_has_capture_channel(alsa_track->element, i)) {
snd_mixer_selem_get_capture_volume(alsa_track->element, i, &tmp);
volumes[i] = (gint) tmp;
}
}
}
}
static void
gst_alsa_mixer_set_volume (GstMixer *mixer,
GstMixerTrack *track,
gint *volumes)
{
gint i;
GstAlsa *alsa = GST_ALSA (mixer);
GstAlsaMixerTrack *alsa_track = (GstAlsaMixerTrack *) track;
g_return_if_fail (((gint) alsa->mixer_handle) != -1);
/* only set the volume with ALSA lib if the track isn't muted. */
if (! (track->flags & GST_MIXER_TRACK_MUTE)) {
for (i = 0; i < track->num_channels; i++) {
if (snd_mixer_selem_has_playback_channel(alsa_track->element, i))
snd_mixer_selem_set_playback_volume(alsa_track->element, i, (long) volumes[i]);
else if (snd_mixer_selem_has_capture_channel(alsa_track->element, i))
snd_mixer_selem_set_capture_volume(alsa_track->element, i, (long) volumes[i]);
}
}
for (i = 0; i < track->num_channels; i++)
alsa_track->volumes[i] = volumes[i];
}
static void
gst_alsa_mixer_set_mute (GstMixer *mixer,
GstMixerTrack *track,
gboolean mute)
{
gint i;
GstAlsa *alsa = GST_ALSA (mixer);
GstAlsaMixerTrack *alsa_track = (GstAlsaMixerTrack *) track;
g_return_if_fail (((gint) alsa->mixer_handle) != -1);
if (mute) {
track->flags |= GST_MIXER_TRACK_MUTE;
for (i = 0; i < track->num_channels; i++) {
if (snd_mixer_selem_has_capture_channel(alsa_track->element, i))
snd_mixer_selem_set_capture_volume(alsa_track->element, i, 0);
else if (snd_mixer_selem_has_playback_channel(alsa_track->element, i))
snd_mixer_selem_set_playback_volume(alsa_track->element, i, 0);
}
} else {
track->flags &= ~GST_MIXER_TRACK_MUTE;
for (i = 0; i < track->num_channels; i++) {
if (snd_mixer_selem_has_capture_channel(alsa_track->element, i))
snd_mixer_selem_set_capture_volume(alsa_track->element, i,
alsa_track->volumes[i]);
else if (snd_mixer_selem_has_playback_channel(alsa_track->element, i))
snd_mixer_selem_set_playback_volume(alsa_track->element, i,
alsa_track->volumes[i]);
}
}
}
static void
gst_alsa_mixer_set_record (GstMixer *mixer,
GstMixerTrack *track,
gboolean record)
{
GstAlsa *alsa = GST_ALSA (mixer);
/* GstAlsaMixerTrack *alsa_track = (GstAlsaMixerTrack *) track; */
g_return_if_fail (((gint) alsa->mixer_handle) != -1);
if (record) {
track->flags |= GST_MIXER_TRACK_RECORD;
} else {
track->flags &= ~GST_MIXER_TRACK_RECORD;
}
}
void
gst_alsa_mixer_build_list (GstAlsa *alsa)
{
gint i, count, err;
snd_mixer_elem_t *element;
/* set up this mixer. */
if ((gint) alsa->mixer_handle == -1) {
if ((err = snd_mixer_open(&alsa->mixer_handle, 0)) != 0) {
GST_ERROR_OBJECT (GST_OBJECT (alsa), "Cannot open mixer device.");
alsa->mixer_handle = (snd_mixer_t *) -1;
return;
}
}
if ((err = snd_mixer_attach(alsa->mixer_handle, alsa->device)) != 0) {
GST_ERROR_OBJECT (GST_OBJECT (alsa),
"Cannot attach mixer to sound device '%s'.",
alsa->device);
return;
}
if ((err = snd_mixer_selem_register(alsa->mixer_handle, NULL, NULL)) != 0) {
GST_ERROR_OBJECT (GST_OBJECT (alsa), "Cannot register mixer elements.");
return;
}
if ((err = snd_mixer_load(alsa->mixer_handle)) != 0) {
GST_ERROR_OBJECT (GST_OBJECT (alsa), "Cannot load mixer settings.");
return;
}
count = snd_mixer_get_count(alsa->mixer_handle);
element = snd_mixer_first_elem(alsa->mixer_handle);
/* build track list */
for (i = 0; i < count; i++) {
GstMixerTrack *track;
gint channels = 0;
gboolean input = FALSE;
gint flags = 0;
/* find out if this is a capture track */
if (snd_mixer_selem_has_capture_channel(element, 0) ||
snd_mixer_selem_has_capture_switch(element) ||
snd_mixer_selem_is_capture_mono(element)) input = TRUE;
flags = (input ? GST_MIXER_TRACK_INPUT : GST_MIXER_TRACK_OUTPUT);
if (input) {
while (snd_mixer_selem_has_capture_channel(element, channels))
channels++;
} else {
while (snd_mixer_selem_has_playback_channel(element, channels))
channels++;
}
/* add track to list */
track = gst_alsa_mixer_track_new (alsa, i, channels, flags);
alsa->tracklist = g_list_append (alsa->tracklist, track);
element = snd_mixer_elem_next(element);
}
}
void
gst_alsa_mixer_free_list (GstAlsa *alsa)
{
g_return_if_fail (((gint) alsa->mixer_handle) != -1);
g_list_foreach (alsa->tracklist, (GFunc) gst_alsa_mixer_track_free, NULL);
g_list_free (alsa->tracklist);
alsa->tracklist = NULL;
snd_mixer_close (alsa->mixer_handle);
alsa->mixer_handle = (snd_mixer_t *) -1;
}
--- NEW FILE: gstalsamixer.h ---
/*
* Copyright (C) 2003 Leif Johnson <le...@am...>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the Free
* Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#ifndef __GST_ALSA_MIXER_H__
#define __GST_ALSA_MIXER_H__
#include "gstalsa.h"
#include <gst/mixer/mixer.h>
G_BEGIN_DECLS
#define GST_ALSA_MIXER_TRACK(obj) (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_ALSA_MIXER,GstAlsaMixer))
#define GST_ALSA_MIXER_TRACK_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_ALSA_MIXER,GstAlsaMixerClass))
#define GST_IS_ALSA_MIXER_TRACK(obj) (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_ALSA_MIXER))
#define GST_IS_ALSA_MIXER_TRACK_CLASS(obj) (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_ALSA_MIXER))
#define GST_TYPE_ALSA_MIXER_TRACK (gst_alsa_mixer_get_type())
typedef struct _GstAlsaMixerTrack GstAlsaMixerTrack;
typedef struct _GstAlsaMixerTrackClass GstAlsaMixerTrackClass;
struct _GstAlsaMixerTrack {
GstMixerTrack parent;
snd_mixer_elem_t *element; /* the ALSA mixer element for this track */
gint track_num;
gint min_rec_volume, max_rec_volume;
gint volumes[GST_ALSA_MAX_CHANNELS];
};
struct _GstAlsaMixerTrackClass {
GstMixerTrackClass parent;
};
GType gst_alsa_mixer_get_type (void);
G_END_DECLS
#endif /* __GST_ALSA_MIXER_H__ */
|