gstreamer/sys/oss/gstossmixertrack.c

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/* GStreamer OSS Mixer implementation
* Copyright (C) 2003 Ronald Bultje <rbultje@ronald.bitfreak.net>
*
* gstossmixer.c: mixer interface implementation for OSS
*
* 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 <stdio.h>
#include <stdlib.h>
#include <fcntl.h>
#include <unistd.h>
#include <string.h>
#include <errno.h>
#include <sys/ioctl.h>
#include <sys/soundcard.h>
#include <gst/gst-i18n-plugin.h>
#include "gstossmixertrack.h"
GST_DEBUG_CATEGORY_EXTERN (oss_debug);
#define GST_CAT_DEFAULT oss_debug
#define MASK_BIT_IS_SET(mask, bit) \
(mask & (1 << bit))
G_DEFINE_TYPE (GstOssMixerTrack, gst_ossmixer_track, GST_TYPE_MIXER_TRACK);
static void
gst_ossmixer_track_class_init (GstOssMixerTrackClass * klass)
{
/* nop */
}
static void
gst_ossmixer_track_init (GstOssMixerTrack * track)
{
track->lvol = track->rvol = 0;
track->track_num = 0;
}
static const gchar **labels = NULL;
/* three functions: firstly, OSS has the nasty habit of inserting
* spaces in the labels, we want to get rid of them. Secondly,
* i18n is impossible with OSS' way of providing us with mixer
* labels, so we make a 'given' list of i18n'ed labels. Thirdly, I
* personally don't like the "1337" names that OSS gives to their
* labels ("Vol", "Mic", "Rec"), I'd rather see full names. */
static void
fill_labels (void)
{
gint i, pos;
gchar *origs[SOUND_MIXER_NRDEVICES] = SOUND_DEVICE_LABELS;
struct
{
gchar *given, *wanted;
}
cases[] = {
/* Note: this list is simply ripped from soundcard.h. For
* some people, some values might be missing (3D surround,
* etc.) - feel free to add them. That's the reason why
* I'm doing this in such a horribly complicated way. */
{
"Vol ", _("Volume")}
, {
"Bass ", _("Bass")}
, {
"Trebl", _("Treble")}
, {
"Synth", _("Synth")}
, {
"Pcm ", _("PCM")}
, {
"Spkr ", _("Speaker")}
, {
"Line ", _("Line-in")}
, {
"Mic ", _("Microphone")}
, {
"CD ", _("CD")}
, {
"Mix ", _("Mixer")}
, {
"Pcm2 ", _("PCM-2")}
, {
"Rec ", _("Record")}
, {
"IGain", _("In-gain")}
, {
"OGain", _("Out-gain")}
, {
"Line1", _("Line-1")}
, {
"Line2", _("Line-2")}
, {
"Line3", _("Line-3")}
, {
"Digital1", _("Digital-1")}
, {
"Digital2", _("Digital-2")}
, {
"Digital3", _("Digital-3")}
, {
"PhoneIn", _("Phone-in")}
, {
"PhoneOut", _("Phone-out")}
, {
"Video", _("Video")}
, {
"Radio", _("Radio")}
, {
"Monitor", _("Monitor")}
, {
NULL, NULL}
};
labels = g_malloc (sizeof (gchar *) * SOUND_MIXER_NRDEVICES);
for (i = 0; i < SOUND_MIXER_NRDEVICES; i++) {
for (pos = 0; cases[pos].given != NULL; pos++) {
if (!strcmp (cases[pos].given, origs[i])) {
labels[i] = g_strdup (cases[pos].wanted);
break;
}
}
if (cases[pos].given == NULL)
labels[i] = g_strdup (origs[i]);
}
}
GstMixerTrack *
gst_ossmixer_track_new (gint mixer_fd,
gint track_num, gint max_chans, gint flags)
{
GstOssMixerTrack *osstrack;
GstMixerTrack *track;
gint volume;
if (!labels)
fill_labels ();
osstrack = g_object_new (GST_TYPE_OSSMIXER_TRACK, NULL);
track = GST_MIXER_TRACK (osstrack);
track->label = g_strdup (labels[track_num]);
track->num_channels = max_chans;
track->flags = flags;
track->min_volume = 0;
track->max_volume = 100;
osstrack->track_num = track_num;
/* volume */
if (ioctl (mixer_fd, MIXER_READ (osstrack->track_num), &volume) < 0) {
g_warning ("Error getting device (%d) volume: %s",
osstrack->track_num, strerror (errno));
volume = 0;
}
osstrack->lvol = (volume & 0xff);
if (track->num_channels == 2) {
osstrack->rvol = ((volume >> 8) & 0xff);
}
return track;
}