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>
#ifdef HAVE_OSS_INCLUDE_IN_SYS
# include <sys/soundcard.h>
#else
# ifdef HAVE_OSS_INCLUDE_IN_ROOT
# include <soundcard.h>
# else
# ifdef HAVE_OSS_INCLUDE_IN_MACHINE
# include <machine/soundcard.h>
# else
# error "What to include?"
# endif /* HAVE_OSS_INCLUDE_IN_MACHINE */
# endif /* HAVE_OSS_INCLUDE_IN_ROOT */
#endif /* HAVE_OSS_INCLUDE_IN_SYS */
#include <gst/gst-i18n-plugin.h>
#include "gstossmixer.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))
static gboolean
gst_ossmixer_open (GstOssMixer * mixer)
{
#ifdef SOUND_MIXER_INFO
struct mixer_info minfo;
#endif
g_return_val_if_fail (mixer->mixer_fd == -1, FALSE);
mixer->mixer_fd = open (mixer->device, O_RDWR);
if (mixer->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",
mixer->device, strerror (errno));
return FALSE;
}
/* get masks */
if (ioctl (mixer->mixer_fd, SOUND_MIXER_READ_RECMASK, &mixer->recmask) < 0
|| ioctl (mixer->mixer_fd, SOUND_MIXER_READ_RECSRC, &mixer->recdevs) < 0
|| ioctl (mixer->mixer_fd, SOUND_MIXER_READ_STEREODEVS,
&mixer->stereomask) < 0
|| ioctl (mixer->mixer_fd, SOUND_MIXER_READ_DEVMASK, &mixer->devmask) < 0
|| ioctl (mixer->mixer_fd, SOUND_MIXER_READ_CAPS, &mixer->mixcaps) < 0) {
GST_DEBUG ("Failed to get device masks");
close (mixer->mixer_fd);
mixer->mixer_fd = -1;
return FALSE;
}
/* get name */
#ifdef SOUND_MIXER_INFO
if (ioctl (mixer->mixer_fd, SOUND_MIXER_INFO, &minfo) == 0) {
mixer->cardname = g_strdup (minfo.name);
}
#else
oss->cardname = g_strdup ("Unknown");
#endif
return TRUE;
}
static void
gst_ossmixer_ensure_track_list (GstOssMixer * mixer)
{
gint i, master = -1;
g_return_if_fail (mixer->mixer_fd != -1);
if (mixer->tracklist)
return;
/* find master volume */
if (mixer->devmask & SOUND_MASK_VOLUME)
master = SOUND_MIXER_VOLUME;
else if (mixer->devmask & SOUND_MASK_PCM)
master = SOUND_MIXER_PCM;
else if (mixer->devmask & SOUND_MASK_SPEAKER)
master = SOUND_MIXER_SPEAKER; /* doubtful... */
/* else: no master, so we won't set any */
/* build track list */
for (i = 0; i < SOUND_MIXER_NRDEVICES; i++) {
if (mixer->devmask & (1 << i)) {
GstMixerTrack *track;
gboolean input = FALSE, stereo = FALSE, record = FALSE;
/* track exists, make up capabilities */
if (MASK_BIT_IS_SET (mixer->stereomask, i))
stereo = TRUE;
if (MASK_BIT_IS_SET (mixer->recmask, i))
input = TRUE;
if (MASK_BIT_IS_SET (mixer->recdevs, i))
record = TRUE;
/* do we want this in our list? */
if (!((mixer->dir & GST_OSS_MIXER_CAPTURE && input == TRUE) ||
(mixer->dir & GST_OSS_MIXER_PLAYBACK && i != SOUND_MIXER_PCM)))
/* the PLAYBACK case seems hacky, but that's how 0.8 had it */
continue;
/* add track to list */
track = gst_ossmixer_track_new (mixer->mixer_fd, i, stereo ? 2 : 1,
(record ? GST_MIXER_TRACK_RECORD : 0) |
(input ? GST_MIXER_TRACK_INPUT :
GST_MIXER_TRACK_OUTPUT) |
((master != i) ? 0 : GST_MIXER_TRACK_MASTER));
mixer->tracklist = g_list_append (mixer->tracklist, track);
}
}
}
GstOssMixer *
gst_ossmixer_new (const char *device, GstOssMixerDirection dir)
{
GstOssMixer *ret = NULL;
g_return_val_if_fail (device != NULL, NULL);
ret = g_new0 (GstOssMixer, 1);
ret->device = g_strdup (device);
ret->dir = dir;
ret->mixer_fd = -1;
if (!gst_ossmixer_open (ret))
goto error;
return ret;
error:
if (ret)
gst_ossmixer_free (ret);
return NULL;
}
void
gst_ossmixer_free (GstOssMixer * mixer)
{
g_return_if_fail (mixer != NULL);
if (mixer->device) {
g_free (mixer->device);
mixer->device = NULL;
}
if (mixer->cardname) {
g_free (mixer->cardname);
mixer->cardname = NULL;
}
if (mixer->tracklist) {
g_list_foreach (mixer->tracklist, (GFunc) g_object_unref, NULL);
g_list_free (mixer->tracklist);
mixer->tracklist = NULL;
}
if (mixer->mixer_fd != -1) {
close (mixer->mixer_fd);
mixer->mixer_fd = -1;
}
g_free (mixer);
}
/* unused with G_DISABLE_* */
static G_GNUC_UNUSED gboolean
gst_ossmixer_contains_track (GstOssMixer * mixer, GstOssMixerTrack * osstrack)
{
const GList *item;
for (item = mixer->tracklist; item != NULL; item = item->next)
if (item->data == osstrack)
return TRUE;
return FALSE;
}
const GList *
gst_ossmixer_list_tracks (GstOssMixer * mixer)
{
gst_ossmixer_ensure_track_list (mixer);
return (const GList *) mixer->tracklist;
}
void
gst_ossmixer_get_volume (GstOssMixer * mixer,
GstMixerTrack * track, gint * volumes)
{
gint volume;
GstOssMixerTrack *osstrack = GST_OSSMIXER_TRACK (track);
g_return_if_fail (mixer->mixer_fd != -1);
g_return_if_fail (gst_ossmixer_contains_track (mixer, 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 (mixer->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);
}
}
}
void
gst_ossmixer_set_volume (GstOssMixer * mixer,
GstMixerTrack * track, gint * volumes)
{
gint volume;
GstOssMixerTrack *osstrack = GST_OSSMIXER_TRACK (track);
g_return_if_fail (mixer->mixer_fd != -1);
g_return_if_fail (gst_ossmixer_contains_track (mixer, 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 (mixer->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];
}
}
void
gst_ossmixer_set_mute (GstOssMixer * mixer, GstMixerTrack * track,
gboolean mute)
{
int volume;
GstOssMixerTrack *osstrack = GST_OSSMIXER_TRACK (track);
g_return_if_fail (mixer->mixer_fd != -1);
g_return_if_fail (gst_ossmixer_contains_track (mixer, osstrack));
if (mute) {
volume = 0;
} else {
volume = (osstrack->lvol & 0xff);
if (MASK_BIT_IS_SET (mixer->stereomask, osstrack->track_num)) {
volume |= ((osstrack->rvol & 0xff) << 8);
}
}
if (ioctl (mixer->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;
}
}
void
gst_ossmixer_set_record (GstOssMixer * mixer,
GstMixerTrack * track, gboolean record)
{
GstOssMixerTrack *osstrack = GST_OSSMIXER_TRACK (track);
g_return_if_fail (mixer->mixer_fd != -1);
g_return_if_fail (gst_ossmixer_contains_track (mixer, 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 (mixer->mixcaps & SOUND_CAP_EXCL_INPUT) {
GList *track;
for (track = mixer->tracklist; track != NULL; track = track->next) {
GstMixerTrack *turn = (GstMixerTrack *) track->data;
turn->flags &= ~GST_MIXER_TRACK_RECORD;
}
mixer->recdevs = 0;
}
/* set new record bit, if needed */
if (record) {
mixer->recdevs |= (1 << osstrack->track_num);
} else {
mixer->recdevs &= ~(1 << osstrack->track_num);
}
/* set it to the device */
if (ioctl (mixer->mixer_fd, SOUND_MIXER_WRITE_RECSRC, &mixer->recdevs) < 0) {
g_warning ("Error setting mixer recording devices (0x%x): %s",
mixer->recdevs, strerror (errno));
return;
}
if (record) {
track->flags |= GST_MIXER_TRACK_RECORD;
} else {
track->flags &= ~GST_MIXER_TRACK_RECORD;
}
}