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Diffstat (limited to 'sys/oss4/oss4-mixer.h')
| -rw-r--r-- | sys/oss4/oss4-mixer.h | 128 |
1 files changed, 128 insertions, 0 deletions
diff --git a/sys/oss4/oss4-mixer.h b/sys/oss4/oss4-mixer.h new file mode 100644 index 00000000..4eaff50c --- /dev/null +++ b/sys/oss4/oss4-mixer.h @@ -0,0 +1,128 @@ +/* GStreamer OSS4 mixer implementation + * Copyright (C) 2007-2008 Tim-Philipp Müller <tim centricular 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., 59 Temple Place - Suite 330, + * Boston, MA 02111-1307, USA. + */ + +#ifndef OSS4_MIXER_H +#define OSS4_MIXER_H + +#include <gst/gst.h> + +#include "oss4-soundcard.h" + +#define GST_OSS4_MIXER(obj) (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_OSS4_MIXER,GstOss4Mixer)) +#define GST_OSS4_MIXER_CAST(obj) ((GstOss4Mixer *)(obj)) +#define GST_OSS4_MIXER_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_OSS4_MIXER,GstOss4MixerClass)) +#define GST_IS_OSS4_MIXER(obj) (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_OSS4_MIXER)) +#define GST_IS_OSS4_MIXER_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_OSS4_MIXER)) +#define GST_TYPE_OSS4_MIXER (gst_oss4_mixer_get_type()) + +#define GST_OSS4_MIXER_IS_OPEN(obj) (GST_OSS4_MIXER(obj)->fd != -1) + +typedef struct _GstOss4Mixer GstOss4Mixer; +typedef struct _GstOss4MixerClass GstOss4MixerClass; + +struct _GstOss4Mixer { + GstElement element; + + /*< private >*/ + + /* element bits'n'bops */ + gchar * device; + + /* mixer details */ + gint fd; /* file descriptor if open, or -1 */ + gchar * device_name; /* device description, or NULL */ + gchar * open_device; /* the device we opened */ + + GList * tracks; /* list of available tracks */ + GList * controls; /* list of available controls */ + gboolean need_update; /* re-read list of available tracks? */ + + oss_mixext last_mixext; /* we keep this around so we can + * easily check if the mixer + * interface has changed */ + + GThread * watch_thread; /* thread watching for value changes */ + GCond * watch_cond; + gint watch_shutdown; + gint modify_counter; /* from MIXERINFO */ + + /* for property probe interface */ + GList * property_probe_list; +}; + +struct _GstOss4MixerClass { + GstElementClass element_class; +}; + +/* helper struct holding info about one control */ +typedef struct _GstOss4MixerControl GstOss4MixerControl; + +struct _GstOss4MixerControl { + oss_mixext mixext; + GstOss4MixerControl *parent; /* NULL if root */ + GstOss4MixerControl *mute; /* sibling with mute function, or NULL */ + GList *mute_group; /* group of mute controls, or NULL */ + GList *children; /* GstOss4MixerControls (no ownership) */ + + GQuark *enum_vals; /* 0-terminated array of values or NULL */ + int enum_version; /* 0 = list won't change */ + + int last_val; /* last value seen */ + + gboolean is_virtual : 1; /* is a vmix control with dynamic label */ + gboolean is_master : 1; + gboolean is_slider : 1; /* represent as slider */ + gboolean is_switch : 1; /* represent as switch */ + gboolean is_enum : 1; /* represent as combo/enumeration */ + gboolean no_list : 1; /* enumeration with no list available */ + gboolean is_input : 1; /* is an input-related control */ + gboolean is_output : 1; /* is an output-related control */ + gboolean used : 1; /* whether we know what to do with this */ + + gboolean changed : 1; /* transient flag used by watch thread */ + gboolean list_changed : 1; /* transient flag used by watch thread */ +}; + +/* header says parent=-1 means root, but it can also be parent=ctrl */ +#define MIXEXT_IS_ROOT(me) ((me).parent == -1 || (me).parent == (me).ctrl) + +#define MIXEXT_IS_SLIDER(me) ((me).type == MIXT_MONOSLIDER || \ + (me).type == MIXT_STEREOSLIDER || (me).type == MIXT_MONOSLIDER16 || \ + (me).type == MIXT_STEREOSLIDER16 || (me).type == MIXT_SLIDER) + +#define MIXEXT_HAS_DESCRIPTION(me) (((me).flags & MIXF_DESCR) != 0) + +#define MIXEXT_ENUM_IS_AVAILABLE(me,num) \ + (((me).enum_present[num/8]) & (1 << (num % 8))) + + +GType gst_oss4_mixer_get_type (void); + +gboolean gst_oss4_mixer_get_control_val (GstOss4Mixer * mixer, + GstOss4MixerControl * mc, + int * val); + +gboolean gst_oss4_mixer_set_control_val (GstOss4Mixer * mixer, + GstOss4MixerControl * mc, + int val); + +G_END_DECLS + +#endif /* OSS4_MIXER_H */ + |