diff -r 4c282e7dd6d3 -r 5505e8908944 gst_plugins_base/ext/alsa/gstalsamixer.h --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/gst_plugins_base/ext/alsa/gstalsamixer.h Fri Jan 22 09:59:59 2010 +0200 @@ -0,0 +1,217 @@ +/* ALSA mixer interface implementation. + * Copyright (C) 2003 Leif Johnson + * + * 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 +#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; + GStaticRecMutex * rec_mutex; + + int pfd[2]; + + GstMixer * interface; + gchar * device; + gchar * cardname; + + GstAlsaMixerDirection dir; +}; + + +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__ */