gstreamer/gst-libs/gst/interfaces/mixer.h

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/* GStreamer Mixer
* Copyright (C) 2003 Ronald Bultje <rbultje@ronald.bitfreak.net>
*
* mixer.h: mixer interface design
*
* 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., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#ifndef __GST_MIXER_H__
#define __GST_MIXER_H__
#include <gst/gst.h>
#include <gst/interfaces/mixeroptions.h>
#include <gst/interfaces/mixertrack.h>
#include <gst/interfaces/interfaces-enumtypes.h>
G_BEGIN_DECLS
#define GST_TYPE_MIXER \
(gst_mixer_get_type ())
#define GST_MIXER(obj) \
(GST_IMPLEMENTS_INTERFACE_CHECK_INSTANCE_CAST ((obj), GST_TYPE_MIXER, GstMixer))
#define GST_MIXER_CLASS(klass) \
(G_TYPE_CHECK_CLASS_CAST ((klass), GST_TYPE_MIXER, GstMixerClass))
#define GST_IS_MIXER(obj) \
(GST_IMPLEMENTS_INTERFACE_CHECK_INSTANCE_TYPE ((obj), GST_TYPE_MIXER))
#define GST_IS_MIXER_CLASS(klass) \
(G_TYPE_CHECK_CLASS_TYPE ((klass), GST_TYPE_MIXER))
#define GST_MIXER_GET_CLASS(inst) \
(G_TYPE_INSTANCE_GET_INTERFACE ((inst), GST_TYPE_MIXER, GstMixerClass))
#define GST_MIXER_TYPE(klass) (klass->mixer_type)
typedef struct _GstMixer GstMixer;
typedef struct _GstMixerClass GstMixerClass;
typedef enum
{
GST_MIXER_HARDWARE,
GST_MIXER_SOFTWARE
} GstMixerType;
/**
* GstMixerMessageType:
* @GST_MIXER_MESSAGE_INVALID: Not a GstMixer message
* @GST_MIXER_MESSAGE_MUTE_TOGGLED: A mute-toggled GstMixer message
* @GST_MIXER_MESSAGE_RECORD_TOGGLED: A record-toggled GstMixer message
* @GST_MIXER_MESSAGE_VOLUME_CHANGED: A volume-changed GstMixer message
* @GST_MIXER_MESSAGE_OPTION_CHANGED: An option-changed GstMixer message
* @GST_MIXER_MESSAGE_OPTIONS_LIST_CHANGED: An options-list-changed
* GstMixer message, posted when the list of available options for a
* GstMixerOptions object has changed (Since: 0.10.18)
* @GST_MIXER_MESSAGE_MIXER_CHANGED: A mixer-changed GstMixer message, posted
* when the list of available mixer tracks has changed. The application
* should re-build its interface in this case (Since: 0.10.18)
*
* An enumeration for the type of a GstMixer message received on the bus
*
* Since: 0.10.14
*/
typedef enum
{
GST_MIXER_MESSAGE_INVALID,
GST_MIXER_MESSAGE_MUTE_TOGGLED,
GST_MIXER_MESSAGE_RECORD_TOGGLED,
GST_MIXER_MESSAGE_VOLUME_CHANGED,
GST_MIXER_MESSAGE_OPTION_CHANGED,
GST_MIXER_MESSAGE_OPTIONS_LIST_CHANGED,
GST_MIXER_MESSAGE_MIXER_CHANGED
} GstMixerMessageType;
/**
* GstMixerFlags:
* @GST_MIXER_FLAG_NONE: No flags
* @GST_MIXER_FLAG_AUTO_NOTIFICATIONS: The mixer implementation automatically sends
* notification messages.
*
* Flags for supported features. Whether the element automatically sends
* notifications on the bus is the only one for now.
*
* Since: 0.10.14
*/
typedef enum
{
GST_MIXER_FLAG_NONE = 0,
GST_MIXER_FLAG_AUTO_NOTIFICATIONS = (1<<0)
} GstMixerFlags;
struct _GstMixerClass {
GTypeInterface klass;
GstMixerType mixer_type;
/* virtual functions */
const GList * (* list_tracks) (GstMixer *mixer);
void (* set_volume) (GstMixer *mixer,
GstMixerTrack *track,
gint *volumes);
void (* get_volume) (GstMixer *mixer,
GstMixerTrack *track,
gint *volumes);
void (* set_mute) (GstMixer *mixer,
GstMixerTrack *track,
gboolean mute);
void (* set_record) (GstMixer *mixer,
GstMixerTrack *track,
gboolean record);
#ifndef GST_DISABLE_DEPRECATED
/* signals (deprecated) */
void (* mute_toggled) (GstMixer *mixer,
GstMixerTrack *channel,
gboolean mute);
void (* record_toggled) (GstMixer *mixer,
GstMixerTrack *channel,
gboolean record);
void (* volume_changed) (GstMixer *mixer,
GstMixerTrack *channel,
gint *volumes);
#else
gpointer padding1[3];
#endif /* not GST_DISABLE_DEPRECATED */
ext/alsa/: Add enumerations (as GstMixerOptions). Make correct distinction between input/output tracks. Add capture/p... Original commit message from CVS: * ext/alsa/Makefile.am: * ext/alsa/gstalsamixer.c: (gst_alsa_mixer_interface_init), (gst_alsa_mixer_build_list), (gst_alsa_mixer_get_volume), (gst_alsa_mixer_set_volume), (gst_alsa_mixer_set_mute), (gst_alsa_mixer_set_record), (gst_alsa_mixer_set_option), (gst_alsa_mixer_get_option): * ext/alsa/gstalsamixer.h: * ext/alsa/gstalsamixeroptions.c: (gst_alsa_mixer_options_get_type), (gst_alsa_mixer_options_class_init), (gst_alsa_mixer_options_init), (gst_alsa_mixer_options_new): * ext/alsa/gstalsamixeroptions.h: * ext/alsa/gstalsamixertrack.c: (gst_alsa_mixer_track_new): * ext/alsa/gstalsamixertrack.h: Add enumerations (as GstMixerOptions). Make correct distinction between input/output tracks. Add capture/playback private flag. Use flag to decide on whether to set capture or playback volumes or switches. Use playback and record switches. * gst-libs/gst/mixer/Makefile.am: * gst-libs/gst/mixer/mixer-marshal.list: * gst-libs/gst/mixer/mixer.c: (gst_mixer_class_init), (gst_mixer_set_option), (gst_mixer_get_option), (gst_mixer_mute_toggled), (gst_mixer_record_toggled), (gst_mixer_volume_changed), (gst_mixer_option_changed): * gst-libs/gst/mixer/mixer.h: * gst-libs/gst/mixer/mixeroptions.c: (gst_mixer_options_get_type), (gst_mixer_options_class_init), (gst_mixer_options_init), (gst_mixer_options_dispose): * gst-libs/gst/mixer/mixeroptions.h: Add GstMixerOptions. * sys/oss/gstosselement.c: (gst_osselement_class_probe_devices): Rename Audio Mixer to OSS Mixer (similar to Alsa Mixer). Fix broken device detection on computers with multiple OSS sound cards.
2004-05-27 03:36:17 +00:00
void (* set_option) (GstMixer *mixer,
GstMixerOptions *opts,
gchar *value);
const gchar * (* get_option) (GstMixer *mixer,
GstMixerOptions *opts);
#ifndef GST_DISABLE_DEPRECATED
void (* option_changed) (GstMixer *mixer,
GstMixerOptions *opts,
gchar *option);
#else
gpointer padding2;
#endif /* not GST_DISABLE_DEPRECATED */
GstMixerFlags (* get_mixer_flags) (GstMixer *mixer);
/*< private >*/
gpointer _gst_reserved[GST_PADDING-1];
};
GType gst_mixer_get_type (void);
/* virtual class function wrappers */
const GList * gst_mixer_list_tracks (GstMixer *mixer);
void gst_mixer_set_volume (GstMixer *mixer,
GstMixerTrack *track,
gint *volumes);
void gst_mixer_get_volume (GstMixer *mixer,
GstMixerTrack *track,
gint *volumes);
void gst_mixer_set_mute (GstMixer *mixer,
GstMixerTrack *track,
gboolean mute);
void gst_mixer_set_record (GstMixer *mixer,
GstMixerTrack *track,
gboolean record);
void gst_mixer_set_option (GstMixer *mixer,
GstMixerOptions *opts,
gchar *value);
const gchar * gst_mixer_get_option (GstMixer *mixer,
GstMixerOptions *opts);
/* trigger bus messages */
void gst_mixer_mute_toggled (GstMixer *mixer,
GstMixerTrack *track,
gboolean mute);
void gst_mixer_record_toggled (GstMixer *mixer,
GstMixerTrack *track,
gboolean record);
void gst_mixer_volume_changed (GstMixer *mixer,
GstMixerTrack *track,
gint *volumes);
void gst_mixer_option_changed (GstMixer *mixer,
GstMixerOptions *opts,
gchar *value);
void gst_mixer_mixer_changed (GstMixer *mixer);
void gst_mixer_options_list_changed (GstMixer *mixer,
GstMixerOptions *opts);
GstMixerFlags gst_mixer_get_mixer_flags (GstMixer *mixer);
/* Functions for recognising and parsing GstMixerMessages on the bus */
GstMixerMessageType gst_mixer_message_get_type (GstMessage *message);
void gst_mixer_message_parse_mute_toggled (GstMessage *message,
GstMixerTrack **track,
gboolean *mute);
void gst_mixer_message_parse_record_toggled (GstMessage *message,
GstMixerTrack **track,
gboolean *record);
void gst_mixer_message_parse_volume_changed (GstMessage *message,
GstMixerTrack **track,
gint **volumes,
gint *num_channels);
void gst_mixer_message_parse_option_changed (GstMessage *message,
GstMixerOptions **options,
const gchar **value);
void gst_mixer_message_parse_options_list_changed (GstMessage *message,
GstMixerOptions **options);
G_END_DECLS
#endif /* __GST_MIXER_H__ */