1 /* GStreamer OSS Mixer implementation
2 * Copyright (C) 2003 Ronald Bultje <rbultje@ronald.bitfreak.net>
4 * gstossmixer.c: mixer interface implementation for OSS
6 * This library is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Library General Public
8 * License as published by the Free Software Foundation; either
9 * version 2 of the License, or (at your option) any later version.
11 * This library is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Library General Public License for more details.
16 * You should have received a copy of the GNU Library General Public
17 * License along with this library; if not, write to the
18 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
19 * Boston, MA 02111-1307, USA.
32 #include <sys/ioctl.h>
33 #include <sys/soundcard.h>
35 #include "gstossmixer.h"
37 #define MASK_BIT_IS_SET(mask, bit) \
40 static void gst_ossmixer_track_class_init (GstOssMixerTrackClass * klass);
41 static void gst_ossmixer_track_init (GstOssMixerTrack * track);
43 static gboolean gst_ossmixer_supported (GstImplementsInterface * iface,
45 static const GList *gst_ossmixer_list_tracks (GstMixer * ossmixer);
47 static void gst_ossmixer_set_volume (GstMixer * ossmixer,
48 GstMixerTrack * track, gint * volumes);
49 static void gst_ossmixer_get_volume (GstMixer * ossmixer,
50 GstMixerTrack * track, gint * volumes);
52 static void gst_ossmixer_set_record (GstMixer * ossmixer,
53 GstMixerTrack * track, gboolean record);
54 static void gst_ossmixer_set_mute (GstMixer * ossmixer,
55 GstMixerTrack * track, gboolean mute);
57 static const gchar **labels = NULL;
58 static GstMixerTrackClass *parent_class = NULL;
60 /* three functions: firstly, OSS has the nasty habit of inserting
61 * spaces in the labels, we want to get rid of them. Secondly,
62 * i18n is impossible with OSS' way of providing us with mixer
63 * labels, so we make a 'given' list of i18n'ed labels. Since
64 * i18n doesn't actually work, we fake it (FIXME). Thirdly, I
65 * personally don't like the "1337" names that OSS gives to their
66 * labels ("Vol", "Mic", "Rec"), I'd rather see full names. */
73 gchar *origs[SOUND_MIXER_NRDEVICES] = SOUND_DEVICE_LABELS;
76 gchar *given, *wanted;
80 /* Note: this list is simply ripped from soundcard.h. For
81 * some people, some values might be missing (3D surround,
82 * etc.) - feel free to add them. That's the reason why
83 * I'm doing this in such a horribly complicated way. */
95 "Spkr ", _("Speaker")}
97 "Line ", _("Line-in")}
99 "Mic ", _("Microphone")}
109 "IGain", _("In-gain")}
111 "OGain", _("Out-gain")}
113 "Line1", _("Line-1")}
115 "Line2", _("Line-2")}
117 "Line3", _("Line-3")}
119 "Digital1", _("Digital-1")}
121 "Digital2", _("Digital-2")}
123 "Digital3", _("Digital-3")}
125 "PhoneIn", _("Phone-in")}
127 "PhoneOut", _("Phone-out")}
133 "Monitor", _("Monitor")}
138 labels = g_malloc (sizeof (gchar *) * SOUND_MIXER_NRDEVICES);
140 for (i = 0; i < SOUND_MIXER_NRDEVICES; i++) {
141 for (pos = 0; cases[pos].given != NULL; pos++) {
142 if (!strcmp (cases[pos].given, origs[i])) {
143 labels[i] = g_strdup (cases[pos].wanted);
147 if (cases[pos].given == NULL)
148 labels[i] = g_strdup (origs[i]);
153 gst_ossmixer_track_get_type (void)
155 static GType gst_ossmixer_track_type = 0;
157 if (!gst_ossmixer_track_type) {
158 static const GTypeInfo ossmixer_track_info = {
159 sizeof (GstOssMixerTrackClass),
162 (GClassInitFunc) gst_ossmixer_track_class_init,
165 sizeof (GstOssMixerTrack),
167 (GInstanceInitFunc) gst_ossmixer_track_init,
171 gst_ossmixer_track_type =
172 g_type_register_static (GST_TYPE_MIXER_TRACK,
173 "GstOssMixerTrack", &ossmixer_track_info, 0);
176 return gst_ossmixer_track_type;
180 gst_ossmixer_track_class_init (GstOssMixerTrackClass * klass)
182 parent_class = g_type_class_ref (GST_TYPE_MIXER_TRACK);
186 gst_ossmixer_track_init (GstOssMixerTrack * track)
188 track->lvol = track->rvol = 0;
189 track->track_num = 0;
193 gst_ossmixer_track_new (GstOssElement * oss,
194 gint track_num, gint max_chans, gint flags)
196 GstOssMixerTrack *osstrack;
197 GstMixerTrack *track;
203 osstrack = g_object_new (GST_TYPE_OSSMIXER_TRACK, NULL);
204 track = GST_MIXER_TRACK (osstrack);
205 track->label = g_strdup (labels[track_num]);
206 track->num_channels = max_chans;
207 track->flags = flags;
208 track->min_volume = 0;
209 track->max_volume = 100;
210 osstrack->track_num = track_num;
213 if (ioctl (oss->mixer_fd, MIXER_READ (osstrack->track_num), &volume) < 0) {
214 g_warning ("Error getting device (%d) volume: %s",
215 osstrack->track_num, strerror (errno));
218 osstrack->lvol = (volume & 0xff);
219 if (track->num_channels == 2) {
220 osstrack->rvol = ((volume >> 8) & 0xff);
227 gst_oss_interface_init (GstImplementsInterfaceClass * klass)
229 /* default virtual functions */
230 klass->supported = gst_ossmixer_supported;
234 gst_ossmixer_interface_init (GstMixerClass * klass)
236 GST_MIXER_TYPE (klass) = GST_MIXER_HARDWARE;
238 /* default virtual functions */
239 klass->list_tracks = gst_ossmixer_list_tracks;
240 klass->set_volume = gst_ossmixer_set_volume;
241 klass->get_volume = gst_ossmixer_get_volume;
242 klass->set_mute = gst_ossmixer_set_mute;
243 klass->set_record = gst_ossmixer_set_record;
247 gst_ossmixer_supported (GstImplementsInterface * iface, GType iface_type)
249 g_assert (iface_type == GST_TYPE_MIXER);
251 return (GST_OSSELEMENT (iface)->mixer_fd != -1);
255 gst_ossmixer_contains_track (GstOssElement * oss, GstOssMixerTrack * osstrack)
259 for (item = oss->tracklist; item != NULL; item = item->next)
260 if (item->data == osstrack)
267 gst_ossmixer_list_tracks (GstMixer * mixer)
269 return (const GList *) GST_OSSELEMENT (mixer)->tracklist;
273 gst_ossmixer_get_volume (GstMixer * mixer,
274 GstMixerTrack * track, gint * volumes)
277 GstOssElement *oss = GST_OSSELEMENT (mixer);
278 GstOssMixerTrack *osstrack = GST_OSSMIXER_TRACK (track);
280 /* assert that we're opened and that we're using a known item */
281 g_return_if_fail (oss->mixer_fd != -1);
282 g_return_if_fail (gst_ossmixer_contains_track (oss, osstrack));
284 if (track->flags & GST_MIXER_TRACK_MUTE) {
285 volumes[0] = osstrack->lvol;
286 if (track->num_channels == 2) {
287 volumes[1] = osstrack->rvol;
291 if (ioctl (oss->mixer_fd, MIXER_READ (osstrack->track_num), &volume) < 0) {
292 g_warning ("Error getting recording device (%d) volume: %s",
293 osstrack->track_num, strerror (errno));
297 osstrack->lvol = volumes[0] = (volume & 0xff);
298 if (track->num_channels == 2) {
299 osstrack->rvol = volumes[1] = ((volume >> 8) & 0xff);
305 gst_ossmixer_set_volume (GstMixer * mixer,
306 GstMixerTrack * track, gint * volumes)
309 GstOssElement *oss = GST_OSSELEMENT (mixer);
310 GstOssMixerTrack *osstrack = GST_OSSMIXER_TRACK (track);
312 /* assert that we're opened and that we're using a known item */
313 g_return_if_fail (oss->mixer_fd != -1);
314 g_return_if_fail (gst_ossmixer_contains_track (oss, osstrack));
316 /* prepare the value for ioctl() */
317 if (!(track->flags & GST_MIXER_TRACK_MUTE)) {
318 volume = (volumes[0] & 0xff);
319 if (track->num_channels == 2) {
320 volume |= ((volumes[1] & 0xff) << 8);
324 if (ioctl (oss->mixer_fd, MIXER_WRITE (osstrack->track_num), &volume) < 0) {
325 g_warning ("Error setting recording device (%d) volume (0x%x): %s",
326 osstrack->track_num, volume, strerror (errno));
331 osstrack->lvol = volumes[0];
332 if (track->num_channels == 2) {
333 osstrack->rvol = volumes[1];
338 gst_ossmixer_set_mute (GstMixer * mixer, GstMixerTrack * track, gboolean mute)
341 GstOssElement *oss = GST_OSSELEMENT (mixer);
342 GstOssMixerTrack *osstrack = GST_OSSMIXER_TRACK (track);
344 /* assert that we're opened and that we're using a known item */
345 g_return_if_fail (oss->mixer_fd != -1);
346 g_return_if_fail (gst_ossmixer_contains_track (oss, osstrack));
351 volume = (osstrack->lvol & 0xff);
352 if (MASK_BIT_IS_SET (oss->stereomask, osstrack->track_num)) {
353 volume |= ((osstrack->rvol & 0xff) << 8);
357 if (ioctl (oss->mixer_fd, MIXER_WRITE (osstrack->track_num), &volume) < 0) {
358 g_warning ("Error setting mixer recording device volume (0x%x): %s",
359 volume, strerror (errno));
364 track->flags |= GST_MIXER_TRACK_MUTE;
366 track->flags &= ~GST_MIXER_TRACK_MUTE;
371 gst_ossmixer_set_record (GstMixer * mixer,
372 GstMixerTrack * track, gboolean record)
374 GstOssElement *oss = GST_OSSELEMENT (mixer);
375 GstOssMixerTrack *osstrack = GST_OSSMIXER_TRACK (track);
377 /* assert that we're opened and that we're using a known item */
378 g_return_if_fail (oss->mixer_fd != -1);
379 g_return_if_fail (gst_ossmixer_contains_track (oss, osstrack));
381 /* if there's nothing to do... */
382 if ((record && GST_MIXER_TRACK_HAS_FLAG (track, GST_MIXER_TRACK_RECORD)) ||
383 (!record && !GST_MIXER_TRACK_HAS_FLAG (track, GST_MIXER_TRACK_RECORD)))
386 /* if we're exclusive, then we need to unset the current one(s) */
387 if (oss->mixcaps & SOUND_CAP_EXCL_INPUT) {
390 for (track = oss->tracklist; track != NULL; track = track->next) {
391 GstMixerTrack *turn = (GstMixerTrack *) track->data;
393 turn->flags &= ~GST_MIXER_TRACK_RECORD;
398 /* set new record bit, if needed */
400 oss->recdevs |= (1 << osstrack->track_num);
402 oss->recdevs &= ~(1 << osstrack->track_num);
405 /* set it to the device */
406 if (ioctl (oss->mixer_fd, SOUND_MIXER_WRITE_RECSRC, &oss->recdevs) < 0) {
407 g_warning ("Error setting mixer recording devices (0x%x): %s",
408 oss->recdevs, strerror (errno));
413 track->flags |= GST_MIXER_TRACK_RECORD;
415 track->flags &= ~GST_MIXER_TRACK_RECORD;
420 gst_ossmixer_build_list (GstOssElement * oss)
422 gint i, devmask, master = -1;
423 const GList *pads = gst_element_get_pad_list (GST_ELEMENT (oss));
424 GstPadDirection dir = GST_PAD_UNKNOWN;
426 #ifdef SOUND_MIXER_INFO
427 struct mixer_info minfo;
430 g_return_if_fail (oss->mixer_fd == -1);
432 oss->mixer_fd = open (oss->mixer_dev, O_RDWR);
433 if (oss->mixer_fd == -1) {
434 /* this is valid. OSS devices don't need to expose a mixer */
435 GST_DEBUG ("Failed to open mixer device %s, mixing disabled: %s",
436 oss->mixer_dev, strerror (errno));
441 if (pads && g_list_length ((GList *) pads) == 1)
442 dir = GST_PAD_DIRECTION (GST_PAD (pads->data));
445 if (ioctl (oss->mixer_fd, SOUND_MIXER_READ_RECMASK, &oss->recmask) < 0 ||
446 ioctl (oss->mixer_fd, SOUND_MIXER_READ_RECSRC, &oss->recdevs) < 0 ||
447 ioctl (oss->mixer_fd, SOUND_MIXER_READ_STEREODEVS, &oss->stereomask) < 0
448 || ioctl (oss->mixer_fd, SOUND_MIXER_READ_DEVMASK, &devmask) < 0
449 || ioctl (oss->mixer_fd, SOUND_MIXER_READ_CAPS, &oss->mixcaps) < 0) {
450 GST_DEBUG ("Failed to get device masks - disabling mixer");
451 close (oss->mixer_fd);
457 #ifdef SOUND_MIXER_INFO
458 if (ioctl (oss->mixer_fd, SOUND_MIXER_INFO, &minfo) == 0) {
459 oss->device_name = g_strdup (minfo.name);
462 oss->device_name = g_strdup ("Unknown");
465 /* find master volume */
466 if (devmask & SOUND_MASK_VOLUME)
467 master = SOUND_MIXER_VOLUME;
468 else if (devmask & SOUND_MASK_PCM)
469 master = SOUND_MIXER_PCM;
470 else if (devmask & SOUND_MASK_SPEAKER)
471 master = SOUND_MIXER_SPEAKER; /* doubtful... */
472 /* else: no master, so we won't set any */
474 /* build track list */
475 for (i = 0; i < SOUND_MIXER_NRDEVICES; i++) {
476 if (devmask & (1 << i)) {
477 GstMixerTrack *track;
478 gboolean input = FALSE, stereo = FALSE, record = FALSE;
480 /* track exists, make up capabilities */
481 if (MASK_BIT_IS_SET (oss->stereomask, i))
483 if (MASK_BIT_IS_SET (oss->recmask, i))
485 if (MASK_BIT_IS_SET (oss->recdevs, i))
488 /* do we want this in our list? */
489 if ((dir == GST_PAD_SRC && input == FALSE) ||
490 (dir == GST_PAD_SINK && i != SOUND_MIXER_PCM))
493 /* add track to list */
494 track = gst_ossmixer_track_new (oss, i, stereo ? 2 : 1,
495 (record ? GST_MIXER_TRACK_RECORD : 0) |
496 (input ? GST_MIXER_TRACK_INPUT :
497 GST_MIXER_TRACK_OUTPUT) |
498 ((master != i) ? 0 : GST_MIXER_TRACK_MASTER));
499 oss->tracklist = g_list_append (oss->tracklist, track);
505 gst_ossmixer_free_list (GstOssElement * oss)
507 if (oss->mixer_fd == -1)
510 g_list_foreach (oss->tracklist, (GFunc) g_object_unref, NULL);
511 g_list_free (oss->tracklist);
512 oss->tracklist = NULL;
514 if (oss->device_name) {
515 g_free (oss->device_name);
516 oss->device_name = NULL;
519 close (oss->mixer_fd);