1 /* GStreamer OSS4 audio source
2 * Copyright (C) 2007-2008 Tim-Philipp Müller <tim centricular net>
4 * This library is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU Library General Public
6 * License as published by the Free Software Foundation; either
7 * version 2 of the License, or (at your option) any later version.
9 * This library is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * Library General Public License for more details.
14 * You should have received a copy of the GNU Library General Public
15 * License along with this library; if not, write to the
16 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
17 * Boston, MA 02111-1307, USA.
21 * SECTION:element-oss4src
23 * This element lets you record sound using the Open Sound System (OSS)
27 * <title>Example pipelines</title>
29 * gst-launch -v oss4src ! queue ! audioconvert ! vorbisenc ! oggmux ! filesink location=mymusic.ogg
30 * ]| will record sound from your sound card using OSS4 and encode it to an
31 * Ogg/Vorbis file (this will only work if your mixer settings are right
32 * and the right inputs areenabled etc.)
38 /* FIXME: make sure we're not doing ioctls from the app thread (e.g. via the
39 * mixer interface) while recording */
45 #include <sys/types.h>
47 #include <sys/ioctl.h>
53 #include <gst/interfaces/mixer.h>
54 #include <gst/gst-i18n-plugin.h>
56 #define NO_LEGACY_MIXER
57 #include "oss4-audio.h"
58 #include "oss4-source.h"
59 #include "oss4-property-probe.h"
60 #include "oss4-soundcard.h"
62 #define GST_OSS4_SOURCE_IS_OPEN(src) (GST_OSS4_SOURCE(src)->fd != -1)
64 GST_DEBUG_CATEGORY_EXTERN (oss4src_debug);
65 #define GST_CAT_DEFAULT oss4src_debug
67 #define DEFAULT_DEVICE NULL
68 #define DEFAULT_DEVICE_NAME NULL
77 static void gst_oss4_source_init_interfaces (GType type);
79 GST_BOILERPLATE_FULL (GstOss4Source, gst_oss4_source, GstAudioSrc,
80 GST_TYPE_AUDIO_SRC, gst_oss4_source_init_interfaces);
82 static void gst_oss4_source_get_property (GObject * object, guint prop_id,
83 GValue * value, GParamSpec * pspec);
84 static void gst_oss4_source_set_property (GObject * object, guint prop_id,
85 const GValue * value, GParamSpec * pspec);
87 static void gst_oss4_source_dispose (GObject * object);
88 static void gst_oss4_source_finalize (GstOss4Source * osssrc);
90 static GstCaps *gst_oss4_source_getcaps (GstBaseSrc * bsrc);
92 static gboolean gst_oss4_source_open (GstAudioSrc * asrc,
93 gboolean silent_errors);
94 static gboolean gst_oss4_source_open_func (GstAudioSrc * asrc);
95 static gboolean gst_oss4_source_close (GstAudioSrc * asrc);
96 static gboolean gst_oss4_source_prepare (GstAudioSrc * asrc,
97 GstRingBufferSpec * spec);
98 static gboolean gst_oss4_source_unprepare (GstAudioSrc * asrc);
99 static guint gst_oss4_source_read (GstAudioSrc * asrc, gpointer data,
101 static guint gst_oss4_source_delay (GstAudioSrc * asrc);
102 static void gst_oss4_source_reset (GstAudioSrc * asrc);
105 gst_oss4_source_base_init (gpointer g_class)
107 GstElementClass *element_class = GST_ELEMENT_CLASS (g_class);
108 GstPadTemplate *templ;
110 gst_element_class_set_details_simple (element_class,
111 "OSS v4 Audio Source", "Source/Audio",
112 "Capture from a sound card via OSS version 4",
113 "Tim-Philipp Müller <tim centricular net>");
115 templ = gst_pad_template_new ("src", GST_PAD_SRC, GST_PAD_ALWAYS,
116 gst_oss4_audio_get_template_caps ());
117 gst_element_class_add_pad_template (element_class, templ);
120 gst_oss4_source_class_init (GstOss4SourceClass * klass)
122 GObjectClass *gobject_class;
123 GstElementClass *gstelement_class;
124 GstBaseSrcClass *gstbasesrc_class;
125 GstBaseAudioSrcClass *gstbaseaudiosrc_class;
126 GstAudioSrcClass *gstaudiosrc_class;
128 gobject_class = (GObjectClass *) klass;
129 gstelement_class = (GstElementClass *) klass;
130 gstbasesrc_class = (GstBaseSrcClass *) klass;
131 gstbaseaudiosrc_class = (GstBaseAudioSrcClass *) klass;
132 gstaudiosrc_class = (GstAudioSrcClass *) klass;
134 gobject_class->dispose = GST_DEBUG_FUNCPTR (gst_oss4_source_dispose);
135 gobject_class->finalize =
136 (GObjectFinalizeFunc) GST_DEBUG_FUNCPTR (gst_oss4_source_finalize);
137 gobject_class->get_property =
138 GST_DEBUG_FUNCPTR (gst_oss4_source_get_property);
139 gobject_class->set_property =
140 GST_DEBUG_FUNCPTR (gst_oss4_source_set_property);
142 gstbasesrc_class->get_caps = GST_DEBUG_FUNCPTR (gst_oss4_source_getcaps);
144 gstaudiosrc_class->open = GST_DEBUG_FUNCPTR (gst_oss4_source_open_func);
145 gstaudiosrc_class->prepare = GST_DEBUG_FUNCPTR (gst_oss4_source_prepare);
146 gstaudiosrc_class->unprepare = GST_DEBUG_FUNCPTR (gst_oss4_source_unprepare);
147 gstaudiosrc_class->close = GST_DEBUG_FUNCPTR (gst_oss4_source_close);
148 gstaudiosrc_class->read = GST_DEBUG_FUNCPTR (gst_oss4_source_read);
149 gstaudiosrc_class->delay = GST_DEBUG_FUNCPTR (gst_oss4_source_delay);
150 gstaudiosrc_class->reset = GST_DEBUG_FUNCPTR (gst_oss4_source_reset);
152 g_object_class_install_property (gobject_class, PROP_DEVICE,
153 g_param_spec_string ("device", "Device",
154 "OSS4 device (e.g. /dev/oss/hdaudio0/pcm0 or /dev/dspN) "
155 "(NULL = use first available device)",
156 DEFAULT_DEVICE, G_PARAM_READWRITE));
158 g_object_class_install_property (gobject_class, PROP_DEVICE_NAME,
159 g_param_spec_string ("device-name", "Device name",
160 "Human-readable name of the sound device", DEFAULT_DEVICE_NAME,
165 gst_oss4_source_init (GstOss4Source * osssrc, GstOss4SourceClass * g_class)
169 device = g_getenv ("AUDIODEV");
171 device = DEFAULT_DEVICE;
174 osssrc->device = g_strdup (device);
175 osssrc->device_name = g_strdup (DEFAULT_DEVICE_NAME);
176 osssrc->device_name = NULL;
180 gst_oss4_source_finalize (GstOss4Source * oss)
182 g_free (oss->device);
185 g_list_free (oss->property_probe_list);
186 oss->property_probe_list = NULL;
188 G_OBJECT_CLASS (parent_class)->finalize ((GObject *) (oss));
192 gst_oss4_source_dispose (GObject * object)
194 GstOss4Source *oss = GST_OSS4_SOURCE (object);
196 if (oss->probed_caps) {
197 gst_caps_unref (oss->probed_caps);
198 oss->probed_caps = NULL;
201 G_OBJECT_CLASS (parent_class)->dispose (object);
205 gst_oss4_source_set_property (GObject * object, guint prop_id,
206 const GValue * value, GParamSpec * pspec)
210 oss = GST_OSS4_SOURCE (object);
214 GST_OBJECT_LOCK (oss);
216 g_free (oss->device);
217 oss->device = g_value_dup_string (value);
218 g_free (oss->device_name);
219 oss->device_name = NULL;
221 g_warning ("%s: can't change \"device\" property while audio source "
222 "is open", GST_OBJECT_NAME (oss));
224 GST_OBJECT_UNLOCK (oss);
227 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
233 gst_oss4_source_get_property (GObject * object, guint prop_id,
234 GValue * value, GParamSpec * pspec)
238 oss = GST_OSS4_SOURCE (object);
242 GST_OBJECT_LOCK (oss);
243 g_value_set_string (value, oss->device);
244 GST_OBJECT_UNLOCK (oss);
246 case PROP_DEVICE_NAME:
247 GST_OBJECT_LOCK (oss);
248 /* If device is set, try to retrieve the name even if we're not open */
249 if (oss->fd == -1 && oss->device != NULL) {
250 if (gst_oss4_source_open (GST_AUDIO_SRC (oss), TRUE)) {
251 g_value_set_string (value, oss->device_name);
252 gst_oss4_source_close (GST_AUDIO_SRC (oss));
256 gst_oss4_property_probe_find_device_name_nofd (GST_OBJECT (oss),
258 g_value_set_string (value, name);
262 g_value_set_string (value, oss->device_name);
265 GST_OBJECT_UNLOCK (oss);
268 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
274 gst_oss4_source_getcaps (GstBaseSrc * bsrc)
279 oss = GST_OSS4_SOURCE (bsrc);
282 caps = gst_caps_copy (gst_oss4_audio_get_template_caps ());
283 } else if (oss->probed_caps) {
284 caps = gst_caps_copy (oss->probed_caps);
286 caps = gst_oss4_audio_probe_caps (GST_OBJECT (oss), oss->fd);
287 if (caps != NULL && !gst_caps_is_empty (caps)) {
288 oss->probed_caps = gst_caps_copy (caps);
295 /* note: we must not take the object lock here unless we fix up get_property */
297 gst_oss4_source_open (GstAudioSrc * asrc, gboolean silent_errors)
303 oss = GST_OSS4_SOURCE (asrc);
306 device = g_strdup (oss->device);
308 device = gst_oss4_audio_find_device (GST_OBJECT_CAST (oss));
310 /* desperate times, desperate measures */
312 device = g_strdup ("/dev/dsp0");
314 GST_INFO_OBJECT (oss, "Trying to open OSS4 device '%s'", device);
316 /* we open in non-blocking mode even if we don't really want to do writes
317 * non-blocking because we can't be sure that this is really a genuine
318 * OSS4 device with well-behaved drivers etc. We really don't want to
319 * hang forever under any circumstances. */
320 oss->fd = open (device, O_RDONLY | O_NONBLOCK, 0);
332 GST_INFO_OBJECT (oss, "Opened device");
334 /* Make sure it's OSS4. If it's old OSS, let osssink handle it */
335 if (!gst_oss4_audio_check_version (GST_OBJECT_CAST (oss), oss->fd))
338 /* now remove the non-blocking flag. */
339 mode = fcntl (oss->fd, F_GETFL);
341 if (fcntl (oss->fd, F_SETFL, mode) < 0) {
342 /* some drivers do no support unsetting the non-blocking flag, try to
343 * close/open the device then. This is racy but we error out properly. */
344 GST_WARNING_OBJECT (oss, "failed to unset O_NONBLOCK (buggy driver?), "
345 "will try to re-open device now");
346 gst_oss4_source_close (asrc);
347 if ((oss->fd = open (device, O_RDONLY, 0)) == -1)
351 oss->open_device = device;
353 /* not using ENGINEINFO here because it sometimes returns a different and
354 * less useful name than AUDIOINFO for the same device */
355 if (!gst_oss4_property_probe_find_device_name (GST_OBJECT (oss), oss->fd,
356 oss->open_device, &oss->device_name)) {
357 oss->device_name = NULL;
365 if (!silent_errors) {
366 GST_ELEMENT_ERROR (oss, RESOURCE, BUSY,
367 (_("Could not open audio device for playback. "
368 "Device is being used by another application.")), (NULL));
375 if (!silent_errors) {
376 GST_ELEMENT_ERROR (oss, RESOURCE, OPEN_READ,
377 (_("Could not open audio device for playback."
378 "You don't have permission to open the device.")),
386 if (!silent_errors) {
387 GST_ELEMENT_ERROR (oss, RESOURCE, OPEN_READ,
388 (_("Could not open audio device for playback.")), GST_ERROR_SYSTEM);
395 gst_oss4_source_close (asrc);
396 if (!silent_errors) {
397 GST_ELEMENT_ERROR (oss, RESOURCE, OPEN_READ,
398 (_("Could not open audio device for playback."
399 "This version of the Open Sound System is not supported by this "
400 "element.")), ("Try the 'osssink' element instead"));
407 if (!silent_errors) {
408 GST_ELEMENT_ERROR (oss, RESOURCE, SETTINGS, (NULL),
409 ("Unable to set device %s into non-blocking mode: %s",
410 oss->device, g_strerror (errno)));
418 gst_oss4_source_open_func (GstAudioSrc * asrc)
420 return gst_oss4_source_open (asrc, FALSE);
424 gst_oss4_source_free_mixer_tracks (GstOss4Source * oss)
426 g_list_foreach (oss->tracks, (GFunc) g_object_unref, NULL);
427 g_list_free (oss->tracks);
432 gst_oss4_source_close (GstAudioSrc * asrc)
436 oss = GST_OSS4_SOURCE (asrc);
439 GST_DEBUG_OBJECT (oss, "closing device");
444 oss->bytes_per_sample = 0;
446 gst_caps_replace (&oss->probed_caps, NULL);
448 g_free (oss->open_device);
449 oss->open_device = NULL;
451 g_free (oss->device_name);
452 oss->device_name = NULL;
454 gst_oss4_source_free_mixer_tracks (oss);
460 gst_oss4_source_prepare (GstAudioSrc * asrc, GstRingBufferSpec * spec)
464 oss = GST_OSS4_SOURCE (asrc);
466 if (!gst_oss4_audio_set_format (GST_OBJECT_CAST (oss), oss->fd, spec)) {
467 GST_WARNING_OBJECT (oss, "Couldn't set requested format %" GST_PTR_FORMAT,
472 oss->bytes_per_sample = spec->bytes_per_sample;
477 gst_oss4_source_unprepare (GstAudioSrc * asrc)
479 /* could do a SNDCTL_DSP_HALT, but the OSS manual recommends a close/open,
480 * since HALT won't properly reset some devices, apparently */
482 if (!gst_oss4_source_close (asrc))
485 if (!gst_oss4_source_open_func (asrc))
493 GST_DEBUG_OBJECT (asrc, "Couldn't close the audio device");
498 GST_DEBUG_OBJECT (asrc, "Couldn't reopen the audio device");
504 gst_oss4_source_read (GstAudioSrc * asrc, gpointer data, guint length)
509 oss = GST_OSS4_SOURCE_CAST (asrc);
511 n = read (oss->fd, data, length);
512 GST_LOG_OBJECT (asrc, "%u bytes, %u samples", n, n / oss->bytes_per_sample);
514 if (G_UNLIKELY (n < 0)) {
518 /* This is the most likely cause, I think */
519 GST_ELEMENT_ERROR (asrc, RESOURCE, READ,
520 (_("Recording is not supported by this audio device.")),
521 ("read: %s (device: %s) (maybe this is an output-only device?)",
522 g_strerror (errno), oss->open_device));
526 GST_ELEMENT_ERROR (asrc, RESOURCE, READ,
527 (_("Error recording from audio device.")),
528 ("read: %s (device: %s)", g_strerror (errno), oss->open_device));
538 gst_oss4_source_delay (GstAudioSrc * asrc)
540 audio_buf_info info = { 0, };
544 oss = GST_OSS4_SOURCE_CAST (asrc);
546 if (ioctl (oss->fd, SNDCTL_DSP_GETISPACE, &info) == -1) {
547 GST_LOG_OBJECT (oss, "GETISPACE failed: %s", g_strerror (errno));
551 delay = (info.fragstotal * info.fragsize) - info.bytes;
552 GST_LOG_OBJECT (oss, "fragstotal:%d, fragsize:%d, bytes:%d, delay:%d",
553 info.fragstotal, info.fragsize, info.bytes, delay);
558 gst_oss4_source_reset (GstAudioSrc * asrc)
560 /* There's nothing we can do here really: OSS can't handle access to the
561 * same device/fd from multiple threads and might deadlock or blow up in
562 * other ways if we try an ioctl SNDCTL_DSP_HALT or similar */
565 /* GstMixer interface, which we abuse here for input selection, because we
566 * don't have a proper interface for that and because that's what
567 * gnome-sound-recorder does. */
569 /* GstMixerTrack is a plain GObject, so let's just use the GLib macro here */
570 G_DEFINE_TYPE (GstOss4SourceInput, gst_oss4_source_input, GST_TYPE_MIXER_TRACK);
573 gst_oss4_source_input_class_init (GstOss4SourceInputClass * klass)
575 /* nothing to do here */
579 gst_oss4_source_input_init (GstOss4SourceInput * i)
581 /* nothing to do here */
587 gst_ossmixer_ensure_track_list (GstOssMixer * mixer)
591 g_return_if_fail (mixer->fd != -1);
593 if (mixer->tracklist)
596 /* find master volume */
597 if (mixer->devmask & SOUND_MASK_VOLUME)
598 master = SOUND_MIXER_VOLUME;
599 else if (mixer->devmask & SOUND_MASK_PCM)
600 master = SOUND_MIXER_PCM;
601 else if (mixer->devmask & SOUND_MASK_SPEAKER)
602 master = SOUND_MIXER_SPEAKER; /* doubtful... */
603 /* else: no master, so we won't set any */
605 /* build track list */
606 for (i = 0; i < SOUND_MIXER_NRDEVICES; i++) {
607 if (mixer->devmask & (1 << i)) {
608 GstMixerTrack *track;
609 gboolean input = FALSE, stereo = FALSE, record = FALSE;
611 /* track exists, make up capabilities */
612 if (MASK_BIT_IS_SET (mixer->stereomask, i))
614 if (MASK_BIT_IS_SET (mixer->recmask, i))
616 if (MASK_BIT_IS_SET (mixer->recdevs, i))
619 /* do we want mixer in our list? */
620 if (!((mixer->dir & GST_OSS_MIXER_CAPTURE && input == TRUE) ||
621 (mixer->dir & GST_OSS_MIXER_PLAYBACK && i != SOUND_MIXER_PCM)))
622 /* the PLAYBACK case seems hacky, but that's how 0.8 had it */
625 /* add track to list */
626 track = gst_ossmixer_track_new (mixer->fd, i, stereo ? 2 : 1,
627 (record ? GST_MIXER_TRACK_RECORD : 0) |
628 (input ? GST_MIXER_TRACK_INPUT :
629 GST_MIXER_TRACK_OUTPUT) |
630 ((master != i) ? 0 : GST_MIXER_TRACK_MASTER));
631 mixer->tracklist = g_list_append (mixer->tracklist, track);
636 /* unused with G_DISABLE_* */
637 static G_GNUC_UNUSED gboolean
638 gst_ossmixer_contains_track (GstOssMixer * mixer, GstOssMixerTrack * osstrack)
642 for (item = mixer->tracklist; item != NULL; item = item->next)
643 if (item->data == osstrack)
650 gst_ossmixer_list_tracks (GstOssMixer * mixer)
652 gst_ossmixer_ensure_track_list (mixer);
654 return (const GList *) mixer->tracklist;
658 gst_ossmixer_get_volume (GstOssMixer * mixer,
659 GstMixerTrack * track, gint * volumes)
662 GstOssMixerTrack *osstrack = GST_OSSMIXER_TRACK (track);
664 g_return_if_fail (mixer->fd != -1);
665 g_return_if_fail (gst_ossmixer_contains_track (mixer, osstrack));
667 if (track->flags & GST_MIXER_TRACK_MUTE) {
668 volumes[0] = osstrack->lvol;
669 if (track->num_channels == 2) {
670 volumes[1] = osstrack->rvol;
674 if (ioctl (mixer->fd, MIXER_READ (osstrack->track_num), &volume) < 0) {
675 g_warning ("Error getting recording device (%d) volume: %s",
676 osstrack->track_num, g_strerror (errno));
680 osstrack->lvol = volumes[0] = (volume & 0xff);
681 if (track->num_channels == 2) {
682 osstrack->rvol = volumes[1] = ((volume >> 8) & 0xff);
688 gst_ossmixer_set_mute (GstOssMixer * mixer, GstMixerTrack * track,
692 GstOssMixerTrack *osstrack = GST_OSSMIXER_TRACK (track);
694 g_return_if_fail (mixer->fd != -1);
695 g_return_if_fail (gst_ossmixer_contains_track (mixer, osstrack));
700 volume = (osstrack->lvol & 0xff);
701 if (MASK_BIT_IS_SET (mixer->stereomask, osstrack->track_num)) {
702 volume |= ((osstrack->rvol & 0xff) << 8);
706 if (ioctl (mixer->fd, MIXER_WRITE (osstrack->track_num), &volume) < 0) {
707 g_warning ("Error setting mixer recording device volume (0x%x): %s",
708 volume, g_strerror (errno));
713 track->flags |= GST_MIXER_TRACK_MUTE;
715 track->flags &= ~GST_MIXER_TRACK_MUTE;
721 gst_oss4_source_mixer_get_current_input (GstOss4Source * oss)
725 if (ioctl (oss->fd, SNDCTL_DSP_GET_RECSRC, &cur) == -1 || cur < 0)
732 gst_oss4_source_mixer_update_record_flags (GstOss4Source * oss, gint cur_route)
734 const gchar *cur_name = "";
737 for (t = oss->tracks; t != NULL; t = t->next) {
738 GstMixerTrack *track = t->data;
740 if (GST_OSS4_SOURCE_INPUT (track)->route == cur_route) {
741 if (!GST_MIXER_TRACK_HAS_FLAG (track, GST_MIXER_TRACK_RECORD)) {
742 track->flags |= GST_MIXER_TRACK_RECORD;
743 /* no point in sending a mixer-record-changes message here */
745 cur_name = track->label;
747 if (GST_MIXER_TRACK_HAS_FLAG (track, GST_MIXER_TRACK_RECORD)) {
748 track->flags &= ~GST_MIXER_TRACK_RECORD;
749 /* no point in sending a mixer-record-changes message here */
758 gst_oss4_source_mixer_list_tracks (GstMixer * mixer)
760 oss_mixer_enuminfo names = { 0, };
762 const gchar *cur_name;
763 GList *tracks = NULL;
766 g_return_val_if_fail (mixer != NULL, NULL);
767 g_return_val_if_fail (GST_IS_OSS4_SOURCE (mixer), NULL);
768 g_return_val_if_fail (GST_OSS4_SOURCE_IS_OPEN (mixer), NULL);
770 oss = GST_OSS4_SOURCE (mixer);
772 if (oss->tracks != NULL && oss->tracks_static)
775 if (ioctl (oss->fd, SNDCTL_DSP_GET_RECSRC_NAMES, &names) == -1)
776 goto get_recsrc_names_error;
778 oss->tracks_static = (names.version == 0);
780 GST_INFO_OBJECT (oss, "%d inputs (list is static: %s):", names.nvalues,
781 (oss->tracks_static) ? "yes" : "no");
783 for (i = 0; i < MIN (names.nvalues, OSS_ENUM_MAXVALUE + 1); ++i) {
784 GstMixerTrack *track;
786 track = g_object_new (GST_TYPE_OSS4_SOURCE_INPUT, NULL);
787 track->label = g_strdup (&names.strings[names.strindex[i]]);
788 track->flags = GST_MIXER_TRACK_INPUT;
789 track->num_channels = 2;
790 track->min_volume = 0;
791 track->max_volume = 100;
792 GST_OSS4_SOURCE_INPUT (track)->route = i;
794 GST_INFO_OBJECT (oss, " [%d] %s", i, track->label);
795 tracks = g_list_append (tracks, track);
798 gst_oss4_source_free_mixer_tracks (oss);
799 oss->tracks = tracks;
803 /* update RECORD flags */
804 cur = gst_oss4_source_mixer_get_current_input (oss);
805 cur_name = gst_oss4_source_mixer_update_record_flags (oss, cur);
806 GST_DEBUG_OBJECT (oss, "current input route: %d (%s)", cur, cur_name);
808 return (const GList *) oss->tracks;
811 get_recsrc_names_error:
813 GST_WARNING_OBJECT (oss, "GET_RECSRC_NAMES failed: %s", g_strerror (errno));
819 gst_oss4_source_mixer_set_volume (GstMixer * mixer, GstMixerTrack * track,
825 g_return_if_fail (mixer != NULL);
826 g_return_if_fail (track != NULL);
827 g_return_if_fail (GST_IS_MIXER_TRACK (track));
828 g_return_if_fail (GST_IS_OSS4_SOURCE (mixer));
829 g_return_if_fail (GST_OSS4_SOURCE_IS_OPEN (mixer));
831 oss = GST_OSS4_SOURCE (mixer);
833 cur = gst_oss4_source_mixer_get_current_input (oss);
834 if (cur != GST_OSS4_SOURCE_INPUT (track)->route) {
835 GST_DEBUG_OBJECT (oss, "track not selected input route, ignoring request");
839 new_vol = (volumes[1] << 8) | volumes[0];
840 if (ioctl (oss->fd, SNDCTL_DSP_SETRECVOL, &new_vol) == -1) {
841 GST_WARNING_OBJECT (oss, "SETRECVOL failed: %s", g_strerror (errno));
846 gst_oss4_source_mixer_get_volume (GstMixer * mixer, GstMixerTrack * track,
852 g_return_if_fail (mixer != NULL);
853 g_return_if_fail (GST_IS_OSS4_SOURCE (mixer));
854 g_return_if_fail (GST_OSS4_SOURCE_IS_OPEN (mixer));
856 oss = GST_OSS4_SOURCE (mixer);
858 cur = gst_oss4_source_mixer_get_current_input (oss);
859 if (cur != GST_OSS4_SOURCE_INPUT (track)->route) {
865 if (ioctl (oss->fd, SNDCTL_DSP_GETRECVOL, &vol) == -1 || vol < 0) {
866 GST_WARNING_OBJECT (oss, "GETRECVOL failed: %s", g_strerror (errno));
870 volumes[0] = MIN (100, vol & 0xff);
871 volumes[1] = MIN (100, (vol >> 8) & 0xff);
877 gst_oss4_source_mixer_set_record (GstMixer * mixer, GstMixerTrack * track,
881 const gchar *cur_name;
884 g_return_if_fail (mixer != NULL);
885 g_return_if_fail (track != NULL);
886 g_return_if_fail (GST_IS_MIXER_TRACK (track));
887 g_return_if_fail (GST_IS_OSS4_SOURCE (mixer));
888 g_return_if_fail (GST_OSS4_SOURCE_IS_OPEN (mixer));
890 oss = GST_OSS4_SOURCE (mixer);
892 cur = gst_oss4_source_mixer_get_current_input (oss);
894 /* stop recording for an input that's not selected anyway => nothing to do */
895 if (!record && cur != GST_OSS4_SOURCE_INPUT (track)->route)
898 /* select recording for an input that's already selected => nothing to do
899 * (or should we mess with the recording volume in this case maybe?) */
900 if (record && cur == GST_OSS4_SOURCE_INPUT (track)->route)
903 /* make current input stop recording: we can't really make an input stop
904 * recording, we can only select an input FOR recording, so we'll just ignore
905 * all requests to stop for now */
907 GST_WARNING_OBJECT (oss, "Can't un-select an input as such, only switch "
908 "to a different input source");
909 /* FIXME: set recording volume to 0 maybe? */
911 int new_route = GST_OSS4_SOURCE_INPUT (track)->route;
913 /* select this input for recording */
915 if (ioctl (oss->fd, SNDCTL_DSP_SET_RECSRC, &new_route) == -1) {
916 GST_WARNING_OBJECT (oss, "Could not select input %d for recording: %s",
917 new_route, g_strerror (errno));
925 cur_name = gst_oss4_source_mixer_update_record_flags (oss, cur);
926 GST_DEBUG_OBJECT (oss, "active input route: %d (%s)", cur, cur_name);
930 gst_oss4_source_mixer_set_mute (GstMixer * mixer, GstMixerTrack * track,
935 g_return_if_fail (mixer != NULL);
936 g_return_if_fail (track != NULL);
937 g_return_if_fail (GST_IS_MIXER_TRACK (track));
938 g_return_if_fail (GST_IS_OSS4_SOURCE (mixer));
939 g_return_if_fail (GST_OSS4_SOURCE_IS_OPEN (mixer));
941 oss = GST_OSS4_SOURCE (mixer);
943 /* FIXME: implement gst_oss4_source_mixer_set_mute() - what to do here? */
944 /* oss4_mixer_set_mute (mixer->mixer, track, mute); */
948 gst_oss4_source_mixer_interface_init (GstMixerClass * klass)
950 GST_MIXER_TYPE (klass) = GST_MIXER_HARDWARE;
952 klass->list_tracks = gst_oss4_source_mixer_list_tracks;
953 klass->set_volume = gst_oss4_source_mixer_set_volume;
954 klass->get_volume = gst_oss4_source_mixer_get_volume;
955 klass->set_mute = gst_oss4_source_mixer_set_mute;
956 klass->set_record = gst_oss4_source_mixer_set_record;
959 /* Implement the horror that is GstImplementsInterface */
962 gst_oss4_source_mixer_supported (GstImplementsInterface * iface,
968 g_return_val_if_fail (GST_IS_OSS4_SOURCE (iface), FALSE);
969 g_return_val_if_fail (iface_type == GST_TYPE_MIXER, FALSE);
971 oss = GST_OSS4_SOURCE (iface);
973 GST_OBJECT_LOCK (oss);
974 is_open = GST_OSS4_SOURCE_IS_OPEN (iface);
975 GST_OBJECT_UNLOCK (oss);
981 gst_oss4_source_mixer_implements_interface_init (GstImplementsInterfaceClass *
984 klass->supported = gst_oss4_source_mixer_supported;
988 gst_oss4_source_init_interfaces (GType type)
990 static const GInterfaceInfo implements_iface_info = {
991 (GInterfaceInitFunc) gst_oss4_source_mixer_implements_interface_init,
995 static const GInterfaceInfo mixer_iface_info = {
996 (GInterfaceInitFunc) gst_oss4_source_mixer_interface_init,
1001 g_type_add_interface_static (type, GST_TYPE_IMPLEMENTS_INTERFACE,
1002 &implements_iface_info);
1003 g_type_add_interface_static (type, GST_TYPE_MIXER, &mixer_iface_info);
1005 gst_oss4_add_property_probe_interface (type);