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217 lines
13 KiB
C
217 lines
13 KiB
C
/* ALSA mixer interface implementation.
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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_H__
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#define __GST_ALSA_MIXER_H__
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#include "gstalsa.h"
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#include <gst/audio/mixer.h>
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#include "gstalsamixeroptions.h"
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#include "gstalsamixertrack.h"
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G_BEGIN_DECLS
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/* This does not get you what you think it does, use obj->mixer */
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/* #define GST_ALSA_MIXER(obj) ((GstAlsaMixer*)(obj)) */
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typedef struct _GstAlsaMixer GstAlsaMixer;
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typedef enum {
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GST_ALSA_MIXER_CAPTURE = 1<<0,
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GST_ALSA_MIXER_PLAYBACK = 1<<1,
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GST_ALSA_MIXER_ALL = GST_ALSA_MIXER_CAPTURE | GST_ALSA_MIXER_PLAYBACK
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} GstAlsaMixerDirection;
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/**
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* GstAlsaMixer:
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*
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* Opaque data structure
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*/
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struct _GstAlsaMixer
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{
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GList * tracklist; /* list of available tracks */
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snd_mixer_t * handle;
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GstTask * task;
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GRecMutex task_mutex;
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GRecMutex rec_mutex;
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int pfd[2];
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GstMixer * interface;
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gchar * device;
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gchar * cardname;
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GstAlsaMixerDirection dir;
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};
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#define GST_ALSA_MIXER_LOCK(mixer) g_rec_mutex_lock (&mixer->rec_mutex)
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#define GST_ALSA_MIXER_UNLOCK(mixer) g_rec_mutex_unlock (&mixer->rec_mutex)
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GstAlsaMixer* gst_alsa_mixer_new (const gchar *device,
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GstAlsaMixerDirection dir);
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void gst_alsa_mixer_free (GstAlsaMixer *mixer);
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const GList* gst_alsa_mixer_list_tracks (GstAlsaMixer * mixer);
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void gst_alsa_mixer_set_volume (GstAlsaMixer * mixer,
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GstMixerTrack * track,
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gint * volumes);
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void gst_alsa_mixer_get_volume (GstAlsaMixer * mixer,
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GstMixerTrack * track,
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gint * volumes);
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void gst_alsa_mixer_set_record (GstAlsaMixer * mixer,
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GstMixerTrack * track,
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gboolean record);
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void gst_alsa_mixer_set_mute (GstAlsaMixer * mixer,
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GstMixerTrack * track,
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gboolean mute);
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void gst_alsa_mixer_set_option (GstAlsaMixer * mixer,
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GstMixerOptions * opts,
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gchar * value);
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const gchar* gst_alsa_mixer_get_option (GstAlsaMixer * mixer,
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GstMixerOptions * opts);
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void _gst_alsa_mixer_set_interface (GstAlsaMixer * mixer,
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GstMixer * interface);
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GstMixerFlags gst_alsa_mixer_get_mixer_flags (GstAlsaMixer *mixer);
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#define GST_IMPLEMENT_ALSA_MIXER_METHODS(Type, interface_as_function) \
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static const GList* \
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interface_as_function ## _list_tracks (GstMixer * mixer) \
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{ \
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Type *this = (Type*) mixer; \
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\
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g_return_val_if_fail (this != NULL, NULL); \
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g_return_val_if_fail (this->mixer != NULL, NULL); \
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\
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return gst_alsa_mixer_list_tracks (this->mixer); \
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} \
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\
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static void \
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interface_as_function ## _set_volume (GstMixer * mixer, GstMixerTrack * track, \
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gint * volumes) \
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{ \
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Type *this = (Type*) mixer; \
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\
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g_return_if_fail (this != NULL); \
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g_return_if_fail (this->mixer != NULL); \
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\
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gst_alsa_mixer_set_volume (this->mixer, track, volumes); \
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} \
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\
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static void \
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interface_as_function ## _get_volume (GstMixer * mixer, GstMixerTrack * track, \
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gint * volumes) \
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{ \
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Type *this = (Type*) mixer; \
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\
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g_return_if_fail (this != NULL); \
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g_return_if_fail (this->mixer != NULL); \
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\
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gst_alsa_mixer_get_volume (this->mixer, track, volumes); \
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} \
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\
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static void \
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interface_as_function ## _set_record (GstMixer * mixer, GstMixerTrack * track, \
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gboolean record) \
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{ \
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Type *this = (Type*) mixer; \
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\
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g_return_if_fail (this != NULL); \
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g_return_if_fail (this->mixer != NULL); \
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\
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gst_alsa_mixer_set_record (this->mixer, track, record); \
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} \
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\
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static void \
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interface_as_function ## _set_mute (GstMixer * mixer, GstMixerTrack * track, \
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gboolean mute) \
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{ \
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Type *this = (Type*) mixer; \
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\
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g_return_if_fail (this != NULL); \
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g_return_if_fail (this->mixer != NULL); \
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\
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gst_alsa_mixer_set_mute (this->mixer, track, mute); \
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} \
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\
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static void \
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interface_as_function ## _set_option (GstMixer * mixer, GstMixerOptions * opts, \
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gchar * value) \
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{ \
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Type *this = (Type*) mixer; \
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\
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g_return_if_fail (this != NULL); \
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g_return_if_fail (this->mixer != NULL); \
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\
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gst_alsa_mixer_set_option (this->mixer, opts, value); \
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} \
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\
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static const gchar* \
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interface_as_function ## _get_option (GstMixer * mixer, GstMixerOptions * opts) \
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{ \
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Type *this = (Type*) mixer; \
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\
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g_return_val_if_fail (this != NULL, NULL); \
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g_return_val_if_fail (this->mixer != NULL, NULL); \
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\
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return gst_alsa_mixer_get_option (this->mixer, opts); \
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} \
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\
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static GstMixerFlags \
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interface_as_function ## _get_mixer_flags (GstMixer * mixer) \
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{ \
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Type *this = (Type*) mixer; \
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\
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g_return_val_if_fail (this != NULL, GST_MIXER_FLAG_NONE); \
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g_return_val_if_fail (this->mixer != NULL, GST_MIXER_FLAG_NONE); \
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\
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return gst_alsa_mixer_get_mixer_flags (this->mixer); \
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} \
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\
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static GstMixerType \
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interface_as_function ## _get_mixer_type (GstMixer * mixer) \
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{ \
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return GST_MIXER_HARDWARE; \
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} \
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\
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static void \
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interface_as_function ## _interface_init (GstMixerInterface * iface) \
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{ \
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/* set up the interface hooks */ \
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iface->list_tracks = interface_as_function ## _list_tracks; \
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iface->set_volume = interface_as_function ## _set_volume; \
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iface->get_volume = interface_as_function ## _get_volume; \
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iface->set_mute = interface_as_function ## _set_mute; \
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iface->set_record = interface_as_function ## _set_record; \
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iface->set_option = interface_as_function ## _set_option; \
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iface->get_option = interface_as_function ## _get_option; \
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iface->get_mixer_flags = interface_as_function ## _get_mixer_flags; \
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iface->get_mixer_type = interface_as_function ## _get_mixer_type; \
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}
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G_END_DECLS
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#endif /* __GST_ALSA_MIXER_H__ */
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