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/* ALSA mixer interface implementation.
* Copyright (C) 2003 Leif Johnson <leif@ambient.2y.net>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the Free
* Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#ifndef __GST_ALSA_MIXER_H__
#define __GST_ALSA_MIXER_H__
#include "gstalsa.h"
#include <gst/interfaces/mixer.h>
#include "gstalsamixeroptions.h"
#include "gstalsamixertrack.h"
G_BEGIN_DECLS
/* This does not get you what you think it does, use obj->mixer */
/* #define GST_ALSA_MIXER(obj) ((GstAlsaMixer*)(obj)) */
typedef struct _GstAlsaMixer GstAlsaMixer;
typedef enum {
GST_ALSA_MIXER_CAPTURE = 1<<0,
GST_ALSA_MIXER_PLAYBACK = 1<<1,
GST_ALSA_MIXER_ALL = GST_ALSA_MIXER_CAPTURE | GST_ALSA_MIXER_PLAYBACK
} GstAlsaMixerDirection;
/**
* GstAlsaMixer:
*
* Opaque data structure
*/
struct _GstAlsaMixer
{
GList * tracklist; /* list of available tracks */
snd_mixer_t * handle;
GstTask * task;
GStaticRecMutex task_mutex;
#if !GLIB_CHECK_VERSION (2, 31, 0)
GStaticRecMutex rec_mutex;
#else
GRecMutex rec_mutex;
#endif
int pfd[2];
GstMixer * interface;
gchar * device;
gchar * cardname;
GstAlsaMixerDirection dir;
};
#if !GLIB_CHECK_VERSION (2, 31, 0)
#define GST_ALSA_MIXER_LOCK(mixer) g_static_rec_mutex_lock (&mixer->rec_mutex)
#define GST_ALSA_MIXER_UNLOCK(mixer) g_static_rec_mutex_unlock (&mixer->rec_mutex)
#else
#define GST_ALSA_MIXER_LOCK(mixer) g_rec_mutex_lock (&mixer->rec_mutex)
#define GST_ALSA_MIXER_UNLOCK(mixer) g_rec_mutex_unlock (&mixer->rec_mutex)
#endif
GstAlsaMixer* gst_alsa_mixer_new (const gchar *device,
GstAlsaMixerDirection dir);
void gst_alsa_mixer_free (GstAlsaMixer *mixer);
const GList* gst_alsa_mixer_list_tracks (GstAlsaMixer * mixer);
void gst_alsa_mixer_set_volume (GstAlsaMixer * mixer,
GstMixerTrack * track,
gint * volumes);
void gst_alsa_mixer_get_volume (GstAlsaMixer * mixer,
GstMixerTrack * track,
gint * volumes);
void gst_alsa_mixer_set_record (GstAlsaMixer * mixer,
GstMixerTrack * track,
gboolean record);
void gst_alsa_mixer_set_mute (GstAlsaMixer * mixer,
GstMixerTrack * track,
gboolean mute);
void gst_alsa_mixer_set_option (GstAlsaMixer * mixer,
GstMixerOptions * opts,
gchar * value);
const gchar* gst_alsa_mixer_get_option (GstAlsaMixer * mixer,
GstMixerOptions * opts);
void _gst_alsa_mixer_set_interface (GstAlsaMixer * mixer,
GstMixer * interface);
GstMixerFlags gst_alsa_mixer_get_mixer_flags (GstAlsaMixer *mixer);
#define GST_IMPLEMENT_ALSA_MIXER_METHODS(Type, interface_as_function) \
static gboolean \
interface_as_function ## _supported (Type *this, GType iface_type) \
{ \
g_assert (iface_type == GST_TYPE_MIXER); \
\
return (this->mixer != NULL); \
} \
\
static const GList* \
interface_as_function ## _list_tracks (GstMixer * mixer) \
{ \
Type *this = (Type*) mixer; \
\
g_return_val_if_fail (this != NULL, NULL); \
g_return_val_if_fail (this->mixer != NULL, NULL); \
\
return gst_alsa_mixer_list_tracks (this->mixer); \
} \
\
static void \
interface_as_function ## _set_volume (GstMixer * mixer, GstMixerTrack * track, \
gint * volumes) \
{ \
Type *this = (Type*) mixer; \
\
g_return_if_fail (this != NULL); \
g_return_if_fail (this->mixer != NULL); \
\
gst_alsa_mixer_set_volume (this->mixer, track, volumes); \
} \
\
static void \
interface_as_function ## _get_volume (GstMixer * mixer, GstMixerTrack * track, \
gint * volumes) \
{ \
Type *this = (Type*) mixer; \
\
g_return_if_fail (this != NULL); \
g_return_if_fail (this->mixer != NULL); \
\
gst_alsa_mixer_get_volume (this->mixer, track, volumes); \
} \
\
static void \
interface_as_function ## _set_record (GstMixer * mixer, GstMixerTrack * track, \
gboolean record) \
{ \
Type *this = (Type*) mixer; \
\
g_return_if_fail (this != NULL); \
g_return_if_fail (this->mixer != NULL); \
\
gst_alsa_mixer_set_record (this->mixer, track, record); \
} \
\
static void \
interface_as_function ## _set_mute (GstMixer * mixer, GstMixerTrack * track, \
gboolean mute) \
{ \
Type *this = (Type*) mixer; \
\
g_return_if_fail (this != NULL); \
g_return_if_fail (this->mixer != NULL); \
\
gst_alsa_mixer_set_mute (this->mixer, track, mute); \
} \
\
static void \
interface_as_function ## _set_option (GstMixer * mixer, GstMixerOptions * opts, \
gchar * value) \
{ \
Type *this = (Type*) mixer; \
\
g_return_if_fail (this != NULL); \
g_return_if_fail (this->mixer != NULL); \
\
gst_alsa_mixer_set_option (this->mixer, opts, value); \
} \
\
static const gchar* \
interface_as_function ## _get_option (GstMixer * mixer, GstMixerOptions * opts) \
{ \
Type *this = (Type*) mixer; \
\
g_return_val_if_fail (this != NULL, NULL); \
g_return_val_if_fail (this->mixer != NULL, NULL); \
\
return gst_alsa_mixer_get_option (this->mixer, opts); \
} \
\
static GstMixerFlags \
interface_as_function ## _get_mixer_flags (GstMixer * mixer) \
{ \
Type *this = (Type*) mixer; \
\
g_return_val_if_fail (this != NULL, GST_MIXER_FLAG_NONE); \
g_return_val_if_fail (this->mixer != NULL, GST_MIXER_FLAG_NONE); \
\
return gst_alsa_mixer_get_mixer_flags (this->mixer); \
} \
\
static void \
interface_as_function ## _interface_init (GstMixerClass * klass) \
{ \
GST_MIXER_TYPE (klass) = GST_MIXER_HARDWARE; \
\
/* set up the interface hooks */ \
klass->list_tracks = interface_as_function ## _list_tracks; \
klass->set_volume = interface_as_function ## _set_volume; \
klass->get_volume = interface_as_function ## _get_volume; \
klass->set_mute = interface_as_function ## _set_mute; \
klass->set_record = interface_as_function ## _set_record; \
klass->set_option = interface_as_function ## _set_option; \
klass->get_option = interface_as_function ## _get_option; \
klass->get_mixer_flags = interface_as_function ## _get_mixer_flags; \
}
G_END_DECLS
#endif /* __GST_ALSA_MIXER_H__ */
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