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6fdb8262a7
Original commit message from CVS: Patch by: Viktor Peters <viktor dot peters at gmail dot com> * ext/alsa/gstalsamixer.c: (gst_alsa_mixer_ensure_track_list), (gst_alsa_mixer_update), (gst_alsa_mixer_get_volume), (gst_alsa_mixer_set_volume), (gst_alsa_mixer_set_mute), (gst_alsa_mixer_set_record): * ext/alsa/gstalsamixertrack.c: (gst_alsa_mixer_track_update_alsa_capabilities), (alsa_track_has_cap), (gst_alsa_mixer_track_new), (gst_alsa_mixer_track_update): * ext/alsa/gstalsamixertrack.h: Improve and fix mixer track handling, in particular better handling of alsa's pvolume/pswitch/cvolume/cswitch capabilities; create separate track objects for tracks that have both capture and playback volume (and label them differently as well so they're not mistakenly assumed to be duplicates); classify mixer tracks that only affect the audible volume of something (rather than the capture volume) as playback tracks. Redefine/fix meaning of RECORD and MUTE flags for capture tracks to correspond to alsa-pswitch alsa-cswitch (following the meaning documented in the mixer interface header file); add support for alsa's exclusive cswitch groups; update/sync state/flags better if mixer settings are changed by another application. Fixes #336075.
80 lines
3.4 KiB
C
80 lines
3.4 KiB
C
/* ALSA mixer track object.
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* Copyright (C) 2003 Leif Johnson <leif@ambient.2y.net>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the Free
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* Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#ifndef __GST_ALSA_MIXER_TRACK_H__
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#define __GST_ALSA_MIXER_TRACK_H__
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#include "gstalsa.h"
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#include <gst/interfaces/mixertrack.h>
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G_BEGIN_DECLS
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#define GST_ALSA_MIXER_TRACK_TYPE (gst_alsa_mixer_track_get_type ())
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#define GST_ALSA_MIXER_TRACK(obj) (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_ALSA_MIXER_TRACK,GstAlsaMixerTrack))
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#define GST_ALSA_MIXER_TRACK_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_ALSA_MIXER_TRACK,GstAlsaMixerTrackClass))
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#define GST_IS_ALSA_MIXER_TRACK(obj) (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_ALSA_MIXER_TRACK))
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#define GST_IS_ALSA_MIXER_TRACK_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_ALSA_MIXER_TRACK))
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#define GST_TYPE_ALSA_MIXER_TRACK (gst_alsa_mixer_track_get_type())
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typedef struct _GstAlsaMixerTrack GstAlsaMixerTrack;
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typedef struct _GstAlsaMixerTrackClass GstAlsaMixerTrackClass;
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#define GST_ALSA_MIXER_TRACK_VOLUME (1<<0) /* common volume */
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#define GST_ALSA_MIXER_TRACK_PVOLUME (1<<1)
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#define GST_ALSA_MIXER_TRACK_CVOLUME (1<<2)
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#define GST_ALSA_MIXER_TRACK_SWITCH (1<<3) /* common switch */
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#define GST_ALSA_MIXER_TRACK_PSWITCH (1<<4)
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#define GST_ALSA_MIXER_TRACK_CSWITCH (1<<5)
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#define GST_ALSA_MIXER_TRACK_CSWITCH_EXCL (1<<6)
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#define GST_ALSA_MAX_CHANNELS (SND_MIXER_SCHN_LAST+1)
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struct _GstAlsaMixerTrack {
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GstMixerTrack parent;
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snd_mixer_elem_t *element; /* the ALSA mixer element for this track */
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GstAlsaMixerTrack *shared_mute;
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gint track_num;
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guint32 alsa_flags; /* alsa track capabilities */
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gint alsa_channels;
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gint capture_group;
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gint volumes[GST_ALSA_MAX_CHANNELS];
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};
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struct _GstAlsaMixerTrackClass {
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GstMixerTrackClass parent;
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};
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GType gst_alsa_mixer_track_get_type (void);
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GstMixerTrack * gst_alsa_mixer_track_new (snd_mixer_elem_t * element,
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gint num,
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gint track_num,
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gint flags,
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gboolean sw, /* is simple switch? */
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GstAlsaMixerTrack * shared_mute_track,
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gboolean label_append_capture);
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void gst_alsa_mixer_track_update (GstAlsaMixerTrack * alsa_track);
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G_END_DECLS
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#endif /* __GST_ALSA_MIXER_TRACK_H__ */
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