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90 lines
3.2 KiB
Text
90 lines
3.2 KiB
Text
$Id$
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* existing gstreamer interfaces
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./gstreamer/gst/gsttaginterface.c
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./gstreamer/gst/gstinterface.c
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./gstreamer/gst/gsturi.c
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./gst-plugins/gst-libs/gst/propertyprobe/propertyprobe.c
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./gst-plugins/gst-libs/gst/mixer/mixer.c
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./gst-plugins/gst-libs/gst/tuner/tuner.c
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./gst-plugins/gst-libs/gst/xoverlay/xoverlay.c
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./gst-plugins/gst-libs/gst/colorbalance/colorbalance.c
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./gst-plugins/gst-libs/gst/navigation/navigation.c
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* new general interfaces
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* GST_TYPE_PRESET_MANAGER
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- add preset managment
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- API:
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GList *get_presets();
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void activate_preset_by_index(glong index);
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void activate_preset_by_name(const gchar *name);
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void add_current(const gchar *name);
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void remove_preset_by_index(glong index);
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void remove_preset_by_name(const gchar *name);
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- features
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- there should always be a default preset
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- questions
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- were and how do we store the presets?
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* GST_TYPE_UI_HINT
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- add hints to generate 'good' looking interfaces to elements
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- API:
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GList *get_group_list();
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struct ui_hint_group {
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gchar *label;
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gachr *role;
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GList *entries;
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}
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struct ui_hint_group_entry {
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enum UiHintGroupEntryType type={PARAM,DPARAM};
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gchar *name;
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}
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roles {
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/* graphics */
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"color_selection/rgb",
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"color_selection/hsv",
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"aspect_ratio",
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/* audio */
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"envelope/adsr",
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}
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- features
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- grouping of parameters, each group has:
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- a label: giving a title to the group
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- a role:
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- this can give the UI a hint about the purpose of the controls
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- this only makes sense, if we dont make this a thousand templates
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- a list of dparams or properties
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- question
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- should this be aware of instruments (voice-groups)
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- no, instruments should auto-generate those
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* GST_TYPE_QUALITY_VS_SPEED
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- get the name of a property that can be used to switch between
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- a fast version for e.g. realtime usage
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- a slower version with higher precission that can be used for off-line
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rendering
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* new interfaces for audio applications
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* GST_TYPE_MUSIC_GENERATOR
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- add hints so that application can use a element as an instrument
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- API:
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// param types
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DParam *get_note_dparam();
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GList *get_trigger_dparams();
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// -- or
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DParamType get_dparam_type(DParam *);
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dparamtype = { NOTE, TRIGGER, OTHER }
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// voices
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char *get_number_of_voices_property();
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GList *get_global_param_names();
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GList *get_voice_param_names();
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- features
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- find out which params to use to play notes/trigger sounds
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- these params will not appear in a control-ui
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- notes involve a key to frequency translation
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- find out if the element has a number_of_voices property
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- if yes, we can find out about the max by looking at the gparamspec
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- setting the property, adds/removes voices
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- if the element supports it, it needs to:
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- register voice-dparams as e.g. note_XXX, where XXX is the voice-number
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- run the voice-loop in the chain/loop function
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each voice processes the same input, if at all
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the outputs of all voices are mixed together
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