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134 lines
3.9 KiB
C
134 lines
3.9 KiB
C
/* GStreamer
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* Copyright (C) 2016 Thibault Saunier <thibault.saunier@collabora.com>
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* 2016 Stefan Sauer <ensonic@users.sf.net>
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*
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* gstlv2utils.h: Header for LV2 plugin utils
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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., 51 Franklin St, Fifth Floor,
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* Boston, MA 02110-1301, USA.
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*/
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#ifndef __GST_LV2_UTILS_H__
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#define __GST_LV2_UTILS_H__
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#include <gst/gst.h>
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#include <gst/audio/audio.h>
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#include <gst/audio/audio-channels.h>
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#include <lilv/lilv.h>
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G_BEGIN_DECLS
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typedef struct _GstLV2Group GstLV2Group;
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typedef struct _GstLV2Port GstLV2Port;
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typedef struct _GstLV2 GstLV2;
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typedef struct _GstLV2Class GstLV2Class;
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struct _GstLV2Group
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{
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gchar *uri; /**< RDF resource (URI or blank node) */
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guint pad; /**< Gst pad index */
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gchar *symbol; /**< Gst pad name / LV2 group symbol */
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GArray *ports; /**< Array of GstLV2Port */
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/* FIXME: not set as of now */
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gboolean has_roles; /**< TRUE iff all ports have a known role */
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};
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typedef enum {
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GST_LV2_PORT_AUDIO = 0,
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GST_LV2_PORT_CONTROL,
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GST_LV2_PORT_CV
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} GstLV2PortType;
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struct _GstLV2Port
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{
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gint index; /**< LV2 port index (on LV2 plugin) */
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GstLV2PortType type; /**< Port type */
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/**< Gst pad index (iff not part of a group), only for audio ports */
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gint pad;
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/* FIXME: not set as of now */
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LilvNode *role; /**< Channel position / port role */
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GstAudioChannelPosition position; /**< Channel position */
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};
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struct _GstLV2
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{
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GstLV2Class *klass;
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LilvInstance *instance;
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GHashTable *presets;
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gboolean activated;
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unsigned long rate;
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struct
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{
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struct
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{
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gfloat *in;
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gfloat *out;
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} control;
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} ports;
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};
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struct _GstLV2Class
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{
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guint properties;
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const LilvPlugin *plugin;
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GHashTable *sym_to_name;
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gint num_control_in, num_control_out;
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gint num_cv_in, num_cv_out;
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GstLV2Group in_group; /**< Array of GstLV2Group */
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GstLV2Group out_group; /**< Array of GstLV2Group */
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GArray *control_in_ports; /**< Array of GstLV2Port */
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GArray *control_out_ports; /**< Array of GstLV2Port */
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};
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gboolean gst_lv2_check_required_features (const LilvPlugin * lv2plugin);
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void gst_lv2_host_init (void);
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gchar **gst_lv2_get_preset_names (GstLV2 * lv2, GstObject * obj);
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gboolean gst_lv2_load_preset (GstLV2 * lv2, GstObject * obj, const gchar * name);
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gboolean gst_lv2_save_preset (GstLV2 * lv2, GstObject * obj, const gchar * name);
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gboolean gst_lv2_delete_preset (GstLV2 * lv2, GstObject * obj, const gchar * name);
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void gst_lv2_init (GstLV2 * lv2, GstLV2Class * lv2_class);
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void gst_lv2_finalize (GstLV2 * lv2);
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gboolean gst_lv2_setup (GstLV2 * lv2, unsigned long rate);
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gboolean gst_lv2_cleanup (GstLV2 * lv2, GstObject *obj);
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void gst_lv2_object_set_property (GstLV2 * lv2, GObject * object,
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guint prop_id, const GValue * value, GParamSpec * pspec);
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void gst_lv2_object_get_property (GstLV2 * lv2, GObject * object,
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guint prop_id, GValue * value, GParamSpec * pspec);
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void gst_lv2_class_install_properties (GstLV2Class * lv2_class,
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GObjectClass * object_class, guint offset);
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void gst_lv2_element_class_set_metadata (GstLV2Class * lv2_class,
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GstElementClass * elem_class, const gchar * lv2_class_tags);
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void gst_lv2_class_init (GstLV2Class * lv2_class, GType type);
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void gst_lv2_class_finalize (GstLV2Class * lv2_class);
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G_END_DECLS
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#endif /* __GST_LV2_UTILS_H__ */
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