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);
121 gst_oss4_source_class_init (GstOss4SourceClass * klass)
123 GObjectClass *gobject_class;
124 GstBaseSrcClass *gstbasesrc_class;
125 GstAudioSrcClass *gstaudiosrc_class;
127 gobject_class = (GObjectClass *) klass;
128 gstbasesrc_class = (GstBaseSrcClass *) klass;
129 gstaudiosrc_class = (GstAudioSrcClass *) klass;
131 gobject_class->dispose = gst_oss4_source_dispose;
132 gobject_class->finalize = (GObjectFinalizeFunc) gst_oss4_source_finalize;
133 gobject_class->get_property = gst_oss4_source_get_property;
134 gobject_class->set_property = gst_oss4_source_set_property;
136 gstbasesrc_class->get_caps = GST_DEBUG_FUNCPTR (gst_oss4_source_getcaps);
138 gstaudiosrc_class->open = GST_DEBUG_FUNCPTR (gst_oss4_source_open_func);
139 gstaudiosrc_class->prepare = GST_DEBUG_FUNCPTR (gst_oss4_source_prepare);
140 gstaudiosrc_class->unprepare = GST_DEBUG_FUNCPTR (gst_oss4_source_unprepare);
141 gstaudiosrc_class->close = GST_DEBUG_FUNCPTR (gst_oss4_source_close);
142 gstaudiosrc_class->read = GST_DEBUG_FUNCPTR (gst_oss4_source_read);
143 gstaudiosrc_class->delay = GST_DEBUG_FUNCPTR (gst_oss4_source_delay);
144 gstaudiosrc_class->reset = GST_DEBUG_FUNCPTR (gst_oss4_source_reset);
146 g_object_class_install_property (gobject_class, PROP_DEVICE,
147 g_param_spec_string ("device", "Device",
148 "OSS4 device (e.g. /dev/oss/hdaudio0/pcm0 or /dev/dspN) "
149 "(NULL = use first available device)",
150 DEFAULT_DEVICE, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
152 g_object_class_install_property (gobject_class, PROP_DEVICE_NAME,
153 g_param_spec_string ("device-name", "Device name",
154 "Human-readable name of the sound device", DEFAULT_DEVICE_NAME,
155 G_PARAM_READABLE | G_PARAM_STATIC_STRINGS));
159 gst_oss4_source_init (GstOss4Source * osssrc, GstOss4SourceClass * g_class)
163 device = g_getenv ("AUDIODEV");
165 device = DEFAULT_DEVICE;
168 osssrc->device = g_strdup (device);
169 osssrc->device_name = g_strdup (DEFAULT_DEVICE_NAME);
170 osssrc->device_name = NULL;
174 gst_oss4_source_finalize (GstOss4Source * oss)
176 g_free (oss->device);
179 g_list_free (oss->property_probe_list);
180 oss->property_probe_list = NULL;
182 G_OBJECT_CLASS (parent_class)->finalize ((GObject *) (oss));
186 gst_oss4_source_dispose (GObject * object)
188 GstOss4Source *oss = GST_OSS4_SOURCE (object);
190 if (oss->probed_caps) {
191 gst_caps_unref (oss->probed_caps);
192 oss->probed_caps = NULL;
195 G_OBJECT_CLASS (parent_class)->dispose (object);
199 gst_oss4_source_set_property (GObject * object, guint prop_id,
200 const GValue * value, GParamSpec * pspec)
204 oss = GST_OSS4_SOURCE (object);
208 GST_OBJECT_LOCK (oss);
210 g_free (oss->device);
211 oss->device = g_value_dup_string (value);
212 g_free (oss->device_name);
213 oss->device_name = NULL;
215 g_warning ("%s: can't change \"device\" property while audio source "
216 "is open", GST_OBJECT_NAME (oss));
218 GST_OBJECT_UNLOCK (oss);
221 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
227 gst_oss4_source_get_property (GObject * object, guint prop_id,
228 GValue * value, GParamSpec * pspec)
232 oss = GST_OSS4_SOURCE (object);
236 GST_OBJECT_LOCK (oss);
237 g_value_set_string (value, oss->device);
238 GST_OBJECT_UNLOCK (oss);
240 case PROP_DEVICE_NAME:
241 GST_OBJECT_LOCK (oss);
242 /* If device is set, try to retrieve the name even if we're not open */
243 if (oss->fd == -1 && oss->device != NULL) {
244 if (gst_oss4_source_open (GST_AUDIO_SRC (oss), TRUE)) {
245 g_value_set_string (value, oss->device_name);
246 gst_oss4_source_close (GST_AUDIO_SRC (oss));
250 gst_oss4_property_probe_find_device_name_nofd (GST_OBJECT (oss),
252 g_value_set_string (value, name);
256 g_value_set_string (value, oss->device_name);
259 GST_OBJECT_UNLOCK (oss);
262 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
268 gst_oss4_source_getcaps (GstBaseSrc * bsrc)
273 oss = GST_OSS4_SOURCE (bsrc);
276 caps = gst_caps_copy (gst_oss4_audio_get_template_caps ());
277 } else if (oss->probed_caps) {
278 caps = gst_caps_copy (oss->probed_caps);
280 caps = gst_oss4_audio_probe_caps (GST_OBJECT (oss), oss->fd);
281 if (caps != NULL && !gst_caps_is_empty (caps)) {
282 oss->probed_caps = gst_caps_copy (caps);
289 /* note: we must not take the object lock here unless we fix up get_property */
291 gst_oss4_source_open (GstAudioSrc * asrc, gboolean silent_errors)
297 oss = GST_OSS4_SOURCE (asrc);
300 device = g_strdup (oss->device);
302 device = gst_oss4_audio_find_device (GST_OBJECT_CAST (oss));
304 /* desperate times, desperate measures */
306 device = g_strdup ("/dev/dsp0");
308 GST_INFO_OBJECT (oss, "Trying to open OSS4 device '%s'", device);
310 /* we open in non-blocking mode even if we don't really want to do writes
311 * non-blocking because we can't be sure that this is really a genuine
312 * OSS4 device with well-behaved drivers etc. We really don't want to
313 * hang forever under any circumstances. */
314 oss->fd = open (device, O_RDONLY | O_NONBLOCK, 0);
326 GST_INFO_OBJECT (oss, "Opened device");
328 /* Make sure it's OSS4. If it's old OSS, let osssink handle it */
329 if (!gst_oss4_audio_check_version (GST_OBJECT_CAST (oss), oss->fd))
332 /* now remove the non-blocking flag. */
333 mode = fcntl (oss->fd, F_GETFL);
335 if (fcntl (oss->fd, F_SETFL, mode) < 0) {
336 /* some drivers do no support unsetting the non-blocking flag, try to
337 * close/open the device then. This is racy but we error out properly. */
338 GST_WARNING_OBJECT (oss, "failed to unset O_NONBLOCK (buggy driver?), "
339 "will try to re-open device now");
340 gst_oss4_source_close (asrc);
341 if ((oss->fd = open (device, O_RDONLY, 0)) == -1)
345 oss->open_device = device;
347 /* not using ENGINEINFO here because it sometimes returns a different and
348 * less useful name than AUDIOINFO for the same device */
349 if (!gst_oss4_property_probe_find_device_name (GST_OBJECT (oss), oss->fd,
350 oss->open_device, &oss->device_name)) {
351 oss->device_name = NULL;
359 if (!silent_errors) {
360 GST_ELEMENT_ERROR (oss, RESOURCE, BUSY,
361 (_("Could not open audio device for playback. "
362 "Device is being used by another application.")), (NULL));
369 if (!silent_errors) {
370 GST_ELEMENT_ERROR (oss, RESOURCE, OPEN_READ,
371 (_("Could not open audio device for playback. "
372 "You don't have permission to open the device.")),
380 if (!silent_errors) {
381 GST_ELEMENT_ERROR (oss, RESOURCE, OPEN_READ,
382 (_("Could not open audio device for playback.")), GST_ERROR_SYSTEM);
389 gst_oss4_source_close (asrc);
390 if (!silent_errors) {
391 GST_ELEMENT_ERROR (oss, RESOURCE, OPEN_READ,
392 (_("Could not open audio device for playback. "
393 "This version of the Open Sound System is not supported by this "
394 "element.")), ("Try the 'osssink' element instead"));
401 if (!silent_errors) {
402 GST_ELEMENT_ERROR (oss, RESOURCE, SETTINGS, (NULL),
403 ("Unable to set device %s into non-blocking mode: %s",
404 oss->device, g_strerror (errno)));
412 gst_oss4_source_open_func (GstAudioSrc * asrc)
414 return gst_oss4_source_open (asrc, FALSE);
418 gst_oss4_source_free_mixer_tracks (GstOss4Source * oss)
420 g_list_foreach (oss->tracks, (GFunc) g_object_unref, NULL);
421 g_list_free (oss->tracks);
426 gst_oss4_source_close (GstAudioSrc * asrc)
430 oss = GST_OSS4_SOURCE (asrc);
433 GST_DEBUG_OBJECT (oss, "closing device");
438 oss->bytes_per_sample = 0;
440 gst_caps_replace (&oss->probed_caps, NULL);
442 g_free (oss->open_device);
443 oss->open_device = NULL;
445 g_free (oss->device_name);
446 oss->device_name = NULL;
448 gst_oss4_source_free_mixer_tracks (oss);
454 gst_oss4_source_prepare (GstAudioSrc * asrc, GstRingBufferSpec * spec)
458 oss = GST_OSS4_SOURCE (asrc);
460 if (!gst_oss4_audio_set_format (GST_OBJECT_CAST (oss), oss->fd, spec)) {
461 GST_WARNING_OBJECT (oss, "Couldn't set requested format %" GST_PTR_FORMAT,
466 oss->bytes_per_sample = spec->bytes_per_sample;
471 gst_oss4_source_unprepare (GstAudioSrc * asrc)
473 /* could do a SNDCTL_DSP_HALT, but the OSS manual recommends a close/open,
474 * since HALT won't properly reset some devices, apparently */
476 if (!gst_oss4_source_close (asrc))
479 if (!gst_oss4_source_open_func (asrc))
487 GST_DEBUG_OBJECT (asrc, "Couldn't close the audio device");
492 GST_DEBUG_OBJECT (asrc, "Couldn't reopen the audio device");
498 gst_oss4_source_read (GstAudioSrc * asrc, gpointer data, guint length)
503 oss = GST_OSS4_SOURCE_CAST (asrc);
505 n = read (oss->fd, data, length);
506 GST_LOG_OBJECT (asrc, "%u bytes, %u samples", n, n / oss->bytes_per_sample);
508 if (G_UNLIKELY (n < 0)) {
512 /* This is the most likely cause, I think */
513 GST_ELEMENT_ERROR (asrc, RESOURCE, READ,
514 (_("Recording is not supported by this audio device.")),
515 ("read: %s (device: %s) (maybe this is an output-only device?)",
516 g_strerror (errno), oss->open_device));
520 GST_ELEMENT_ERROR (asrc, RESOURCE, READ,
521 (_("Error recording from audio device.")),
522 ("read: %s (device: %s)", g_strerror (errno), oss->open_device));
532 gst_oss4_source_delay (GstAudioSrc * asrc)
534 audio_buf_info info = { 0, };
538 oss = GST_OSS4_SOURCE_CAST (asrc);
540 if (ioctl (oss->fd, SNDCTL_DSP_GETISPACE, &info) == -1) {
541 GST_LOG_OBJECT (oss, "GETISPACE failed: %s", g_strerror (errno));
545 delay = (info.fragstotal * info.fragsize) - info.bytes;
546 GST_LOG_OBJECT (oss, "fragstotal:%d, fragsize:%d, bytes:%d, delay:%d",
547 info.fragstotal, info.fragsize, info.bytes, delay);
552 gst_oss4_source_reset (GstAudioSrc * asrc)
554 /* There's nothing we can do here really: OSS can't handle access to the
555 * same device/fd from multiple threads and might deadlock or blow up in
556 * other ways if we try an ioctl SNDCTL_DSP_HALT or similar */
559 /* GstMixer interface, which we abuse here for input selection, because we
560 * don't have a proper interface for that and because that's what
561 * gnome-sound-recorder does. */
563 /* GstMixerTrack is a plain GObject, so let's just use the GLib macro here */
564 G_DEFINE_TYPE (GstOss4SourceInput, gst_oss4_source_input, GST_TYPE_MIXER_TRACK);
567 gst_oss4_source_input_class_init (GstOss4SourceInputClass * klass)
569 /* nothing to do here */
573 gst_oss4_source_input_init (GstOss4SourceInput * i)
575 /* nothing to do here */
581 gst_ossmixer_ensure_track_list (GstOssMixer * mixer)
585 g_return_if_fail (mixer->fd != -1);
587 if (mixer->tracklist)
590 /* find master volume */
591 if (mixer->devmask & SOUND_MASK_VOLUME)
592 master = SOUND_MIXER_VOLUME;
593 else if (mixer->devmask & SOUND_MASK_PCM)
594 master = SOUND_MIXER_PCM;
595 else if (mixer->devmask & SOUND_MASK_SPEAKER)
596 master = SOUND_MIXER_SPEAKER; /* doubtful... */
597 /* else: no master, so we won't set any */
599 /* build track list */
600 for (i = 0; i < SOUND_MIXER_NRDEVICES; i++) {
601 if (mixer->devmask & (1 << i)) {
602 GstMixerTrack *track;
603 gboolean input = FALSE, stereo = FALSE, record = FALSE;
605 /* track exists, make up capabilities */
606 if (MASK_BIT_IS_SET (mixer->stereomask, i))
608 if (MASK_BIT_IS_SET (mixer->recmask, i))
610 if (MASK_BIT_IS_SET (mixer->recdevs, i))
613 /* do we want mixer in our list? */
614 if (!((mixer->dir & GST_OSS_MIXER_CAPTURE && input == TRUE) ||
615 (mixer->dir & GST_OSS_MIXER_PLAYBACK && i != SOUND_MIXER_PCM)))
616 /* the PLAYBACK case seems hacky, but that's how 0.8 had it */
619 /* add track to list */
620 track = gst_ossmixer_track_new (mixer->fd, i, stereo ? 2 : 1,
621 (record ? GST_MIXER_TRACK_RECORD : 0) |
622 (input ? GST_MIXER_TRACK_INPUT :
623 GST_MIXER_TRACK_OUTPUT) |
624 ((master != i) ? 0 : GST_MIXER_TRACK_MASTER));
625 mixer->tracklist = g_list_append (mixer->tracklist, track);
630 /* unused with G_DISABLE_* */
631 static G_GNUC_UNUSED gboolean
632 gst_ossmixer_contains_track (GstOssMixer * mixer, GstOssMixerTrack * osstrack)
636 for (item = mixer->tracklist; item != NULL; item = item->next)
637 if (item->data == osstrack)
644 gst_ossmixer_list_tracks (GstOssMixer * mixer)
646 gst_ossmixer_ensure_track_list (mixer);
648 return (const GList *) mixer->tracklist;
652 gst_ossmixer_get_volume (GstOssMixer * mixer,
653 GstMixerTrack * track, gint * volumes)
656 GstOssMixerTrack *osstrack = GST_OSSMIXER_TRACK (track);
658 g_return_if_fail (mixer->fd != -1);
659 g_return_if_fail (gst_ossmixer_contains_track (mixer, osstrack));
661 if (track->flags & GST_MIXER_TRACK_MUTE) {
662 volumes[0] = osstrack->lvol;
663 if (track->num_channels == 2) {
664 volumes[1] = osstrack->rvol;
668 if (ioctl (mixer->fd, MIXER_READ (osstrack->track_num), &volume) < 0) {
669 g_warning ("Error getting recording device (%d) volume: %s",
670 osstrack->track_num, g_strerror (errno));
674 osstrack->lvol = volumes[0] = (volume & 0xff);
675 if (track->num_channels == 2) {
676 osstrack->rvol = volumes[1] = ((volume >> 8) & 0xff);
682 gst_ossmixer_set_mute (GstOssMixer * mixer, GstMixerTrack * track,
686 GstOssMixerTrack *osstrack = GST_OSSMIXER_TRACK (track);
688 g_return_if_fail (mixer->fd != -1);
689 g_return_if_fail (gst_ossmixer_contains_track (mixer, osstrack));
694 volume = (osstrack->lvol & 0xff);
695 if (MASK_BIT_IS_SET (mixer->stereomask, osstrack->track_num)) {
696 volume |= ((osstrack->rvol & 0xff) << 8);
700 if (ioctl (mixer->fd, MIXER_WRITE (osstrack->track_num), &volume) < 0) {
701 g_warning ("Error setting mixer recording device volume (0x%x): %s",
702 volume, g_strerror (errno));
707 track->flags |= GST_MIXER_TRACK_MUTE;
709 track->flags &= ~GST_MIXER_TRACK_MUTE;
715 gst_oss4_source_mixer_get_current_input (GstOss4Source * oss)
719 if (ioctl (oss->fd, SNDCTL_DSP_GET_RECSRC, &cur) == -1 || cur < 0)
726 gst_oss4_source_mixer_update_record_flags (GstOss4Source * oss, gint cur_route)
728 const gchar *cur_name = "";
731 for (t = oss->tracks; t != NULL; t = t->next) {
732 GstMixerTrack *track = t->data;
734 if (GST_OSS4_SOURCE_INPUT (track)->route == cur_route) {
735 if (!GST_MIXER_TRACK_HAS_FLAG (track, GST_MIXER_TRACK_RECORD)) {
736 track->flags |= GST_MIXER_TRACK_RECORD;
737 /* no point in sending a mixer-record-changes message here */
739 cur_name = track->label;
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 */
752 gst_oss4_source_mixer_list_tracks (GstMixer * mixer)
754 oss_mixer_enuminfo names = { 0, };
756 const gchar *cur_name;
757 GList *tracks = NULL;
760 g_return_val_if_fail (mixer != NULL, NULL);
761 g_return_val_if_fail (GST_IS_OSS4_SOURCE (mixer), NULL);
762 g_return_val_if_fail (GST_OSS4_SOURCE_IS_OPEN (mixer), NULL);
764 oss = GST_OSS4_SOURCE (mixer);
766 if (oss->tracks != NULL && oss->tracks_static)
769 if (ioctl (oss->fd, SNDCTL_DSP_GET_RECSRC_NAMES, &names) == -1)
770 goto get_recsrc_names_error;
772 oss->tracks_static = (names.version == 0);
774 GST_INFO_OBJECT (oss, "%d inputs (list is static: %s):", names.nvalues,
775 (oss->tracks_static) ? "yes" : "no");
777 for (i = 0; i < MIN (names.nvalues, OSS_ENUM_MAXVALUE + 1); ++i) {
778 GstMixerTrack *track;
780 track = g_object_new (GST_TYPE_OSS4_SOURCE_INPUT, NULL);
781 track->label = g_strdup (&names.strings[names.strindex[i]]);
782 track->flags = GST_MIXER_TRACK_INPUT;
783 track->num_channels = 2;
784 track->min_volume = 0;
785 track->max_volume = 100;
786 GST_OSS4_SOURCE_INPUT (track)->route = i;
788 GST_INFO_OBJECT (oss, " [%d] %s", i, track->label);
789 tracks = g_list_append (tracks, track);
792 gst_oss4_source_free_mixer_tracks (oss);
793 oss->tracks = tracks;
797 /* update RECORD flags */
798 cur = gst_oss4_source_mixer_get_current_input (oss);
799 cur_name = gst_oss4_source_mixer_update_record_flags (oss, cur);
800 GST_DEBUG_OBJECT (oss, "current input route: %d (%s)", cur, cur_name);
802 return (const GList *) oss->tracks;
805 get_recsrc_names_error:
807 GST_WARNING_OBJECT (oss, "GET_RECSRC_NAMES failed: %s", g_strerror (errno));
813 gst_oss4_source_mixer_set_volume (GstMixer * mixer, GstMixerTrack * track,
819 g_return_if_fail (mixer != NULL);
820 g_return_if_fail (track != NULL);
821 g_return_if_fail (GST_IS_MIXER_TRACK (track));
822 g_return_if_fail (GST_IS_OSS4_SOURCE (mixer));
823 g_return_if_fail (GST_OSS4_SOURCE_IS_OPEN (mixer));
825 oss = GST_OSS4_SOURCE (mixer);
827 cur = gst_oss4_source_mixer_get_current_input (oss);
828 if (cur != GST_OSS4_SOURCE_INPUT (track)->route) {
829 GST_DEBUG_OBJECT (oss, "track not selected input route, ignoring request");
833 new_vol = (volumes[1] << 8) | volumes[0];
834 if (ioctl (oss->fd, SNDCTL_DSP_SETRECVOL, &new_vol) == -1) {
835 GST_WARNING_OBJECT (oss, "SETRECVOL failed: %s", g_strerror (errno));
840 gst_oss4_source_mixer_get_volume (GstMixer * mixer, GstMixerTrack * track,
846 g_return_if_fail (mixer != NULL);
847 g_return_if_fail (GST_IS_OSS4_SOURCE (mixer));
848 g_return_if_fail (GST_OSS4_SOURCE_IS_OPEN (mixer));
850 oss = GST_OSS4_SOURCE (mixer);
852 cur = gst_oss4_source_mixer_get_current_input (oss);
853 if (cur != GST_OSS4_SOURCE_INPUT (track)->route) {
859 if (ioctl (oss->fd, SNDCTL_DSP_GETRECVOL, &vol) == -1 || vol < 0) {
860 GST_WARNING_OBJECT (oss, "GETRECVOL failed: %s", g_strerror (errno));
864 volumes[0] = MIN (100, vol & 0xff);
865 volumes[1] = MIN (100, (vol >> 8) & 0xff);
871 gst_oss4_source_mixer_set_record (GstMixer * mixer, GstMixerTrack * track,
875 const gchar *cur_name;
878 g_return_if_fail (mixer != NULL);
879 g_return_if_fail (track != NULL);
880 g_return_if_fail (GST_IS_MIXER_TRACK (track));
881 g_return_if_fail (GST_IS_OSS4_SOURCE (mixer));
882 g_return_if_fail (GST_OSS4_SOURCE_IS_OPEN (mixer));
884 oss = GST_OSS4_SOURCE (mixer);
886 cur = gst_oss4_source_mixer_get_current_input (oss);
888 /* stop recording for an input that's not selected anyway => nothing to do */
889 if (!record && cur != GST_OSS4_SOURCE_INPUT (track)->route)
892 /* select recording for an input that's already selected => nothing to do
893 * (or should we mess with the recording volume in this case maybe?) */
894 if (record && cur == GST_OSS4_SOURCE_INPUT (track)->route)
897 /* make current input stop recording: we can't really make an input stop
898 * recording, we can only select an input FOR recording, so we'll just ignore
899 * all requests to stop for now */
901 GST_WARNING_OBJECT (oss, "Can't un-select an input as such, only switch "
902 "to a different input source");
903 /* FIXME: set recording volume to 0 maybe? */
905 int new_route = GST_OSS4_SOURCE_INPUT (track)->route;
907 /* select this input for recording */
909 if (ioctl (oss->fd, SNDCTL_DSP_SET_RECSRC, &new_route) == -1) {
910 GST_WARNING_OBJECT (oss, "Could not select input %d for recording: %s",
911 new_route, g_strerror (errno));
919 cur_name = gst_oss4_source_mixer_update_record_flags (oss, cur);
920 GST_DEBUG_OBJECT (oss, "active input route: %d (%s)", cur, cur_name);
924 gst_oss4_source_mixer_set_mute (GstMixer * mixer, GstMixerTrack * track,
927 g_return_if_fail (mixer != NULL);
928 g_return_if_fail (track != NULL);
929 g_return_if_fail (GST_IS_MIXER_TRACK (track));
930 g_return_if_fail (GST_IS_OSS4_SOURCE (mixer));
931 g_return_if_fail (GST_OSS4_SOURCE_IS_OPEN (mixer));
933 /* FIXME: implement gst_oss4_source_mixer_set_mute() - what to do here? */
934 /* oss4_mixer_set_mute (mixer->mixer, track, mute); */
938 gst_oss4_source_mixer_interface_init (GstMixerClass * klass)
940 GST_MIXER_TYPE (klass) = GST_MIXER_HARDWARE;
942 klass->list_tracks = gst_oss4_source_mixer_list_tracks;
943 klass->set_volume = gst_oss4_source_mixer_set_volume;
944 klass->get_volume = gst_oss4_source_mixer_get_volume;
945 klass->set_mute = gst_oss4_source_mixer_set_mute;
946 klass->set_record = gst_oss4_source_mixer_set_record;
949 /* Implement the horror that is GstImplementsInterface */
952 gst_oss4_source_mixer_supported (GstImplementsInterface * iface,
958 g_return_val_if_fail (GST_IS_OSS4_SOURCE (iface), FALSE);
959 g_return_val_if_fail (iface_type == GST_TYPE_MIXER, FALSE);
961 oss = GST_OSS4_SOURCE (iface);
963 GST_OBJECT_LOCK (oss);
964 is_open = GST_OSS4_SOURCE_IS_OPEN (iface);
965 GST_OBJECT_UNLOCK (oss);
971 gst_oss4_source_mixer_implements_interface_init (GstImplementsInterfaceClass *
974 klass->supported = gst_oss4_source_mixer_supported;
978 gst_oss4_source_init_interfaces (GType type)
980 static const GInterfaceInfo implements_iface_info = {
981 (GInterfaceInitFunc) gst_oss4_source_mixer_implements_interface_init,
985 static const GInterfaceInfo mixer_iface_info = {
986 (GInterfaceInitFunc) gst_oss4_source_mixer_interface_init,
991 g_type_add_interface_static (type, GST_TYPE_IMPLEMENTS_INTERFACE,
992 &implements_iface_info);
993 g_type_add_interface_static (type, GST_TYPE_MIXER, &mixer_iface_info);
995 gst_oss4_add_property_probe_interface (type);