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207 lines
8.6 KiB
C
207 lines
8.6 KiB
C
/* GStreamer Mixer
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* Copyright (C) 2003 Ronald Bultje <rbultje@ronald.bitfreak.net>
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*
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* mixer.h: mixer interface design
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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
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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#ifndef __GST_MIXER_H__
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#define __GST_MIXER_H__
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#include <gst/gst.h>
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#include <gst/audio/mixeroptions.h>
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#include <gst/audio/mixertrack.h>
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G_BEGIN_DECLS
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#define GST_TYPE_MIXER \
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(gst_mixer_get_type ())
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#define GST_MIXER(obj) \
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(G_TYPE_CHECK_INSTANCE_CAST ((obj), GST_TYPE_MIXER, GstMixer))
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#define GST_IS_MIXER(obj) \
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(G_TYPE_CHECK_INSTANCE_TYPE ((obj), GST_TYPE_MIXER))
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#define GST_MIXER_GET_INTERFACE(inst) \
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(G_TYPE_INSTANCE_GET_INTERFACE ((inst), GST_TYPE_MIXER, GstMixerInterface))
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#define GST_MIXER_TYPE(iface) (iface->mixer_type)
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typedef struct _GstMixer GstMixer;
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typedef struct _GstMixerInterface GstMixerInterface;
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/**
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* GstMixerType:
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* @GST_MIXER_HARDWARE: mixing is implemented with dedicated hardware.
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* @GST_MIXER_SOFTWARE: mixing is implemented via software processing.
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*
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* Mixer classification.
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*/
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typedef enum
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{
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GST_MIXER_HARDWARE,
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GST_MIXER_SOFTWARE
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} GstMixerType;
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/**
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* GstMixerMessageType:
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* @GST_MIXER_MESSAGE_INVALID: Not a GstMixer message
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* @GST_MIXER_MESSAGE_MUTE_TOGGLED: A mute-toggled GstMixer message
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* @GST_MIXER_MESSAGE_RECORD_TOGGLED: A record-toggled GstMixer message
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* @GST_MIXER_MESSAGE_VOLUME_CHANGED: A volume-changed GstMixer message
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* @GST_MIXER_MESSAGE_OPTION_CHANGED: An option-changed GstMixer message
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* @GST_MIXER_MESSAGE_OPTIONS_LIST_CHANGED: An options-list-changed
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* GstMixer message, posted when the list of available options for a
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* GstMixerOptions object has changed (Since: 0.10.18)
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* @GST_MIXER_MESSAGE_MIXER_CHANGED: A mixer-changed GstMixer message, posted
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* when the list of available mixer tracks has changed. The application
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* should re-build its interface in this case (Since: 0.10.18)
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*
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* An enumeration for the type of a GstMixer message received on the bus
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*
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* Since: 0.10.14
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*/
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typedef enum
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{
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GST_MIXER_MESSAGE_INVALID,
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GST_MIXER_MESSAGE_MUTE_TOGGLED,
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GST_MIXER_MESSAGE_RECORD_TOGGLED,
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GST_MIXER_MESSAGE_VOLUME_CHANGED,
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GST_MIXER_MESSAGE_OPTION_CHANGED,
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GST_MIXER_MESSAGE_OPTIONS_LIST_CHANGED,
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GST_MIXER_MESSAGE_MIXER_CHANGED
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} GstMixerMessageType;
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/**
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* GstMixerFlags:
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* @GST_MIXER_FLAG_NONE: No flags
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* @GST_MIXER_FLAG_AUTO_NOTIFICATIONS: The mixer implementation automatically
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* sends notification messages.
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* @GST_MIXER_FLAG_HAS_WHITELIST: The mixer implementation flags tracks that
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* should be displayed by default (whitelisted). Since: 0.10.23
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* @GST_MIXER_FLAG_GROUPING: The mixer implementation will leave some controls
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* marked without either input or output. Controls marked as input or
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* output should be grouped with input & output sliders, even if they
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* are options or bare switches. Since: 0.10.23
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*
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* Flags indicating which optional features are supported by a mixer
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* implementation.
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*
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* Since: 0.10.14
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*/
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typedef enum
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{
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GST_MIXER_FLAG_NONE = 0,
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GST_MIXER_FLAG_AUTO_NOTIFICATIONS = (1<<0),
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GST_MIXER_FLAG_HAS_WHITELIST = (1<<1),
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GST_MIXER_FLAG_GROUPING = (1<<2),
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} GstMixerFlags;
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struct _GstMixerInterface {
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GTypeInterface iface;
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GstMixerType mixer_type;
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/* virtual functions */
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const GList * (* list_tracks) (GstMixer *mixer);
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void (* set_volume) (GstMixer *mixer,
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GstMixerTrack *track,
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gint *volumes);
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void (* get_volume) (GstMixer *mixer,
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GstMixerTrack *track,
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gint *volumes);
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void (* set_mute) (GstMixer *mixer,
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GstMixerTrack *track,
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gboolean mute);
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void (* set_record) (GstMixer *mixer,
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GstMixerTrack *track,
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gboolean record);
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void (* set_option) (GstMixer *mixer,
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GstMixerOptions *opts,
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gchar *value);
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const gchar * (* get_option) (GstMixer *mixer,
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GstMixerOptions *opts);
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GstMixerFlags (* get_mixer_flags) (GstMixer *mixer);
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};
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GType gst_mixer_get_type (void);
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/* virtual class function wrappers */
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const GList * gst_mixer_list_tracks (GstMixer *mixer);
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void gst_mixer_set_volume (GstMixer *mixer,
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GstMixerTrack *track,
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gint *volumes);
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void gst_mixer_get_volume (GstMixer *mixer,
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GstMixerTrack *track,
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gint *volumes);
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void gst_mixer_set_mute (GstMixer *mixer,
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GstMixerTrack *track,
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gboolean mute);
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void gst_mixer_set_record (GstMixer *mixer,
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GstMixerTrack *track,
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gboolean record);
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void gst_mixer_set_option (GstMixer *mixer,
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GstMixerOptions *opts,
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gchar *value);
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const gchar * gst_mixer_get_option (GstMixer *mixer,
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GstMixerOptions *opts);
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/* trigger bus messages */
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void gst_mixer_mute_toggled (GstMixer *mixer,
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GstMixerTrack *track,
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gboolean mute);
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void gst_mixer_record_toggled (GstMixer *mixer,
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GstMixerTrack *track,
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gboolean record);
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void gst_mixer_volume_changed (GstMixer *mixer,
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GstMixerTrack *track,
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gint *volumes);
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void gst_mixer_option_changed (GstMixer *mixer,
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GstMixerOptions *opts,
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const gchar *value);
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void gst_mixer_mixer_changed (GstMixer *mixer);
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void gst_mixer_options_list_changed (GstMixer *mixer,
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GstMixerOptions *opts);
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GstMixerType gst_mixer_get_mixer_type (GstMixer *mixer);
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GstMixerFlags gst_mixer_get_mixer_flags (GstMixer *mixer);
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/* Functions for recognising and parsing GstMixerMessages on the bus */
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GstMixerMessageType gst_mixer_message_get_type (GstMessage *message);
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void gst_mixer_message_parse_mute_toggled (GstMessage *message,
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GstMixerTrack **track,
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gboolean *mute);
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void gst_mixer_message_parse_record_toggled (GstMessage *message,
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GstMixerTrack **track,
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gboolean *record);
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void gst_mixer_message_parse_volume_changed (GstMessage *message,
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GstMixerTrack **track,
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gint **volumes,
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gint *num_channels);
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void gst_mixer_message_parse_option_changed (GstMessage *message,
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GstMixerOptions **options,
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const gchar **value);
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void gst_mixer_message_parse_options_list_changed (GstMessage *message,
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GstMixerOptions **options);
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G_END_DECLS
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#endif /* __GST_MIXER_H__ */
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