gstreamer/sys/oss/gstossmixer.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 "gstossmixer.h"
#define MASK_BIT_IS_SET(mask, bit) \
(mask & (1 << bit))
static void gst_ossmixer_track_class_init (GstOssMixerTrackClass *klass);
static void gst_ossmixer_track_init (GstOssMixerTrack *track);
static gboolean gst_ossmixer_supported (GstInterface *iface,
GType iface_type);
static const GList *
gst_ossmixer_list_tracks (GstMixer *ossmixer);
static void gst_ossmixer_set_volume (GstMixer *ossmixer,
GstMixerTrack *track,
gint *volumes);
static void gst_ossmixer_get_volume (GstMixer *ossmixer,
GstMixerTrack *track,
gint *volumes);
static void gst_ossmixer_set_record (GstMixer *ossmixer,
GstMixerTrack *track,
gboolean record);
static void gst_ossmixer_set_mute (GstMixer *ossmixer,
GstMixerTrack *track,
gboolean mute);
static const gchar **labels = NULL;
static GstMixerTrackClass *parent_class = 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. Since
* i18n doesn't actually work, we fake it (FIXME). Thirdly, I
* personally don't like the "1337" names that OSS gives to their
* labels ("Vol", "Mic", "Rec"), I'd rather see full names. */
#define _(s) s
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]);
}
}
GType
gst_ossmixer_track_get_type (void)
{
static GType gst_ossmixer_track_type = 0;
if (!gst_ossmixer_track_type) {
static const GTypeInfo ossmixer_track_info = {
sizeof (GstOssMixerTrackClass),
NULL,
NULL,
(GClassInitFunc) gst_ossmixer_track_class_init,
NULL,
NULL,
sizeof (GstOssMixerTrack),
0,
(GInstanceInitFunc) gst_ossmixer_track_init,
NULL
};
gst_ossmixer_track_type =
g_type_register_static (GST_TYPE_MIXER_TRACK,
"GstOssMixerTrack",
&ossmixer_track_info, 0);
}
return gst_ossmixer_track_type;
}
static void
gst_ossmixer_track_class_init (GstOssMixerTrackClass *klass)
{
parent_class = g_type_class_ref (GST_TYPE_MIXER_TRACK);
}
static void
gst_ossmixer_track_init (GstOssMixerTrack *track)
{
track->lvol = track->rvol = 0;
track->track_num = 0;
}
GstMixerTrack *
gst_ossmixer_track_new (GstOssElement *oss,
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(oss->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;
}
void
gst_oss_interface_init (GstInterfaceClass *klass)
{
/* default virtual functions */
klass->supported = gst_ossmixer_supported;
}
void
gst_ossmixer_interface_init (GstMixerClass *klass)
{
/* default virtual functions */
klass->list_tracks = gst_ossmixer_list_tracks;
klass->set_volume = gst_ossmixer_set_volume;
klass->get_volume = gst_ossmixer_get_volume;
klass->set_mute = gst_ossmixer_set_mute;
klass->set_record = gst_ossmixer_set_record;
}
static gboolean
gst_ossmixer_supported (GstInterface *iface,
GType iface_type)
{
g_assert (iface_type == GST_TYPE_MIXER);
return (GST_OSSELEMENT (iface)->mixer_fd != -1);
}
static gboolean
gst_ossmixer_contains_track (GstOssElement *oss,
GstOssMixerTrack *osstrack)
{
const GList *item;
for (item = oss->tracklist; item != NULL; item = item->next)
if (item->data == osstrack)
return TRUE;
return FALSE;
}
static const GList *
gst_ossmixer_list_tracks (GstMixer *mixer)
{
return (const GList *) GST_OSSELEMENT (mixer)->tracklist;
}
static void
gst_ossmixer_get_volume (GstMixer *mixer,
GstMixerTrack *track,
gint *volumes)
{
gint volume;
GstOssElement *oss = GST_OSSELEMENT (mixer);
GstOssMixerTrack *osstrack = GST_OSSMIXER_TRACK (track);
/* assert that we're opened and that we're using a known item */
g_return_if_fail (oss->mixer_fd != -1);
g_return_if_fail (gst_ossmixer_contains_track (oss, osstrack));
if (track->flags & GST_MIXER_TRACK_MUTE) {
volumes[0] = osstrack->lvol;
if (track->num_channels == 2) {
volumes[1] = osstrack->rvol;
}
} else {
/* get */
if (ioctl(oss->mixer_fd, MIXER_READ (osstrack->track_num), &volume) < 0) {
g_warning("Error getting recording device (%d) volume: %s",
osstrack->track_num, strerror(errno));
volume = 0;
}
osstrack->lvol = volumes[0] = (volume & 0xff);
if (track->num_channels == 2) {
osstrack->rvol = volumes[1] = ((volume >> 8) & 0xff);
}
}
}
static void
gst_ossmixer_set_volume (GstMixer *mixer,
GstMixerTrack *track,
gint *volumes)
{
gint volume;
GstOssElement *oss = GST_OSSELEMENT (mixer);
GstOssMixerTrack *osstrack = GST_OSSMIXER_TRACK (track);
/* assert that we're opened and that we're using a known item */
g_return_if_fail (oss->mixer_fd != -1);
g_return_if_fail (gst_ossmixer_contains_track (oss, osstrack));
/* prepare the value for ioctl() */
if (!(track->flags & GST_MIXER_TRACK_MUTE)) {
volume = (volumes[0] & 0xff);
if (track->num_channels == 2) {
volume |= ((volumes[1] & 0xff) << 8);
}
/* set */
if (ioctl(oss->mixer_fd, MIXER_WRITE (osstrack->track_num), &volume) < 0) {
g_warning("Error setting recording device (%d) volume (0x%x): %s",
osstrack->track_num, volume, strerror(errno));
return;
}
}
osstrack->lvol = volumes[0];
if (track->num_channels == 2) {
osstrack->rvol = volumes[1];
}
}
static void
gst_ossmixer_set_mute (GstMixer *mixer,
GstMixerTrack *track,
gboolean mute)
{
int volume;
GstOssElement *oss = GST_OSSELEMENT (mixer);
GstOssMixerTrack *osstrack = GST_OSSMIXER_TRACK (track);
/* assert that we're opened and that we're using a known item */
g_return_if_fail (oss->mixer_fd != -1);
g_return_if_fail (gst_ossmixer_contains_track (oss, osstrack));
if (mute) {
volume = 0;
} else {
volume = (osstrack->lvol & 0xff);
if (MASK_BIT_IS_SET (oss->stereomask, osstrack->track_num)) {
volume |= ((osstrack->rvol & 0xff) << 8);
}
}
if (ioctl(oss->mixer_fd, MIXER_WRITE(osstrack->track_num), &volume) < 0) {
g_warning("Error setting mixer recording device volume (0x%x): %s",
volume, strerror(errno));
return;
}
if (mute) {
track->flags |= GST_MIXER_TRACK_MUTE;
} else {
track->flags &= ~GST_MIXER_TRACK_MUTE;
}
}
static void
gst_ossmixer_set_record (GstMixer *mixer,
GstMixerTrack *track,
gboolean record)
{
GstOssElement *oss = GST_OSSELEMENT (mixer);
GstOssMixerTrack *osstrack = GST_OSSMIXER_TRACK (track);
/* assert that we're opened and that we're using a known item */
g_return_if_fail (oss->mixer_fd != -1);
g_return_if_fail (gst_ossmixer_contains_track (oss, osstrack));
/* if there's nothing to do... */
if ((record && GST_MIXER_TRACK_HAS_FLAG (track, GST_MIXER_TRACK_RECORD)) ||
(!record && !GST_MIXER_TRACK_HAS_FLAG (track, GST_MIXER_TRACK_RECORD)))
return;
/* if we're exclusive, then we need to unset the current one(s) */
if (oss->mixcaps & SOUND_CAP_EXCL_INPUT) {
GList *track;
for (track = oss->tracklist; track != NULL; track = track->next) {
GstMixerTrack *turn = (GstMixerTrack *) track->data;
turn->flags &= ~GST_MIXER_TRACK_RECORD;
}
oss->recdevs = 0;
}
/* set new record bit, if needed */
if (record) {
oss->recdevs |= (1 << osstrack->track_num);
} else {
oss->recdevs &= ~(1 << osstrack->track_num);
}
/* set it to the device */
if (ioctl(oss->mixer_fd, SOUND_MIXER_WRITE_RECSRC, &oss->recdevs) < 0) {
g_warning("Error setting mixer recording devices (0x%x): %s",
oss->recdevs, strerror(errno));
return;
}
if (record) {
track->flags |= GST_MIXER_TRACK_RECORD;
} else {
track->flags &= ~GST_MIXER_TRACK_RECORD;
}
}
void
gst_ossmixer_build_list (GstOssElement *oss)
{
gint i, devmask;
const GList *pads = gst_element_get_pad_list (GST_ELEMENT (oss));
GstPadDirection dir = GST_PAD_UNKNOWN;
struct mixer_info minfo;
g_return_if_fail (oss->mixer_fd == -1);
oss->mixer_fd = open (oss->mixer_dev, O_RDWR);
if (oss->mixer_fd == -1) {
/* this is valid. OSS devices don't need to expose a mixer */
GST_DEBUG ("Failed to open mixer device %s, mixing disabled: %s",
oss->mixer_dev, strerror (errno));
return;
}
/* get direction */
if (pads && g_list_length ((GList *) pads) == 1)
dir = GST_PAD_DIRECTION (GST_PAD (pads->data));
/* get masks */
if (ioctl (oss->mixer_fd, SOUND_MIXER_READ_RECMASK, &oss->recmask) < 0 ||
ioctl (oss->mixer_fd, SOUND_MIXER_READ_RECSRC, &oss->recdevs) < 0 ||
ioctl (oss->mixer_fd, SOUND_MIXER_READ_STEREODEVS, &oss->stereomask) < 0 ||
ioctl (oss->mixer_fd, SOUND_MIXER_READ_DEVMASK, &devmask) < 0 ||
ioctl (oss->mixer_fd, SOUND_MIXER_READ_CAPS, &oss->mixcaps) < 0) {
GST_DEBUG ("Failed to get device masks - disabling mixer");
close (oss->mixer_fd);
oss->mixer_fd = -1;
return;
}
/* get name */
if (ioctl (oss->mixer_fd, SOUND_MIXER_INFO, &minfo) == 0) {
oss->device_name = g_strdup (minfo.name);
}
/* build track list */
for (i = 0; i < SOUND_MIXER_NRDEVICES; i++) {
if (devmask & (1 << i)) {
GstMixerTrack *track;
gboolean input = FALSE, stereo = FALSE, record = FALSE;
/* track exists, make up capabilities */
if (MASK_BIT_IS_SET (oss->stereomask, i))
stereo = TRUE;
if (MASK_BIT_IS_SET (oss->recmask, i))
input = TRUE;
if (MASK_BIT_IS_SET (oss->recdevs, i))
record = TRUE;
/* do we want this in our list? */
if ((dir == GST_PAD_SRC && input == FALSE) ||
(dir == GST_PAD_SINK && i == SOUND_MIXER_PCM))
continue;
/* add track to list */
track = gst_ossmixer_track_new (oss, i, stereo ? 2 : 1,
(record ? GST_MIXER_TRACK_RECORD : 0) |
(input ? GST_MIXER_TRACK_INPUT :
GST_MIXER_TRACK_OUTPUT));
oss->tracklist = g_list_append (oss->tracklist, track);
}
}
}
void
gst_ossmixer_free_list (GstOssElement *oss)
{
if (oss->mixer_fd == -1)
return;
g_list_foreach (oss->tracklist, (GFunc) g_object_unref, NULL);
g_list_free (oss->tracklist);
oss->tracklist = NULL;
if (oss->device_name) {
g_free (oss->device_name);
oss->device_name = NULL;
}
close (oss->mixer_fd);
oss->mixer_fd = -1;
}