/* GStreamer * Copyright (C) 1999 Erik Walthinsen <omega@cse.ogi.edu> * 2001 Steve Baker <stevebaker_org@yahoo.co.uk> * 2003 Andy Wingo <wingo at pobox.com> * * 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., 51 Franklin St, Fifth Floor, * Boston, MA 02110-1301, USA. */ /** * SECTION:element-lv2 * @short_description: bridge for LV2. * * LV2 is a standard for plugins and matching host applications, * mainly targeted at audio processing and generation. It is intended as * a successor to LADSPA (Linux Audio Developer's Simple Plugin API). * * The LV2 element is a bridge for plugins using the * <ulink url="http://www.lv2plug.in/">LV2</ulink> API. It scans all * installed LV2 plugins and registers them as gstreamer elements. */ #ifdef HAVE_CONFIG_H #include "config.h" #endif #include <string.h> #include <math.h> #include <glib.h> #include <gst/audio/audio.h> #include <gst/audio/multichannel.h> #include "gstlv2.h" #include <slv2/slv2.h> #define GST_LV2_DEFAULT_PATH \ "/usr/lib/lv2" G_SEARCHPATH_SEPARATOR_S \ "/usr/local/lib/lv2" G_SEARCHPATH_SEPARATOR_S \ LIBDIR "/lv2" static void gst_lv2_set_property (GObject * object, guint prop_id, const GValue * value, GParamSpec * pspec); static void gst_lv2_get_property (GObject * object, guint prop_id, GValue * value, GParamSpec * pspec); static gboolean gst_lv2_setup (GstSignalProcessor * sigproc, GstCaps * caps); static gboolean gst_lv2_start (GstSignalProcessor * sigproc); static void gst_lv2_stop (GstSignalProcessor * sigproc); static void gst_lv2_cleanup (GstSignalProcessor * sigproc); static void gst_lv2_process (GstSignalProcessor * sigproc, guint nframes); static SLV2World world; static SLV2Value audio_class; static SLV2Value control_class; static SLV2Value input_class; static SLV2Value output_class; static SLV2Value integer_prop; static SLV2Value toggled_prop; static SLV2Value in_place_broken_pred; static SLV2Value in_group_pred; static SLV2Value has_role_pred; static SLV2Value lv2_symbol_pred; static SLV2Value center_role; static SLV2Value left_role; static SLV2Value right_role; static SLV2Value rear_center_role; static SLV2Value rear_left_role; static SLV2Value rear_right_role; static SLV2Value lfe_role; static SLV2Value center_left_role; static SLV2Value center_right_role; static SLV2Value side_left_role; static SLV2Value side_right_role; static GstSignalProcessorClass *parent_class; static GstPlugin *gst_lv2_plugin; GST_DEBUG_CATEGORY_STATIC (lv2_debug); #define GST_CAT_DEFAULT lv2_debug static GQuark descriptor_quark = 0; /* Convert an LV2 port role to a Gst channel positon * WARNING: If the group has only a single port, * GST_AUDIO_CHANNEL_POSITION_FRONT_CENTER will be returned for pg:centerRole * (which is used by LV2 for mono groups), but this is not correct. In this * case the value must be changed to GST_AUDIO_CHANNEL_POSITION_FRONT_MONO * (this can't be done by this function because this information isn't known * at the time it is used). */ static GstAudioChannelPosition gst_lv2_role_to_position (SLV2Value role) { /* Front. Mono and left/right are mututally exclusive */ if (slv2_value_equals (role, center_role)) { return GST_AUDIO_CHANNEL_POSITION_FRONT_CENTER; } else if (slv2_value_equals (role, left_role)) { return GST_AUDIO_CHANNEL_POSITION_FRONT_LEFT; } else if (slv2_value_equals (role, right_role)) { return GST_AUDIO_CHANNEL_POSITION_FRONT_RIGHT; /* Rear. Left/right and center are mututally exclusive */ } else if (slv2_value_equals (role, rear_center_role)) { return GST_AUDIO_CHANNEL_POSITION_REAR_CENTER; } else if (slv2_value_equals (role, rear_left_role)) { return GST_AUDIO_CHANNEL_POSITION_REAR_LEFT; } else if (slv2_value_equals (role, rear_right_role)) { return GST_AUDIO_CHANNEL_POSITION_REAR_RIGHT; /* Subwoofer/low-frequency-effects */ } else if (slv2_value_equals (role, lfe_role)) { return GST_AUDIO_CHANNEL_POSITION_LFE; /* Center front speakers. Center and left/right_of_center * are mutually exclusive */ } else if (slv2_value_equals (role, center_left_role)) { return GST_AUDIO_CHANNEL_POSITION_FRONT_LEFT_OF_CENTER; } else if (slv2_value_equals (role, center_right_role)) { return GST_AUDIO_CHANNEL_POSITION_FRONT_RIGHT_OF_CENTER; /* sides */ } else if (slv2_value_equals (role, side_left_role)) { return GST_AUDIO_CHANNEL_POSITION_SIDE_LEFT; } else if (slv2_value_equals (role, side_right_role)) { return GST_AUDIO_CHANNEL_POSITION_SIDE_RIGHT; } return GST_AUDIO_CHANNEL_POSITION_INVALID; } /* Find and return the group @a uri in @a groups, or NULL if not found */ static GstLV2Group * gst_lv2_class_find_group (GArray * groups, SLV2Value uri) { int i = 0; for (; i < groups->len; ++i) if (slv2_value_equals (g_array_index (groups, GstLV2Group, i).uri, uri)) return &g_array_index (groups, GstLV2Group, i); return NULL; } static GstAudioChannelPosition * gst_lv2_build_positions (GstLV2Group * group) { GstAudioChannelPosition *positions = NULL; /* don't do anything for mono */ if (group->ports->len > 1) { gint i; positions = g_new (GstAudioChannelPosition, group->ports->len); for (i = 0; i < group->ports->len; ++i) positions[i] = g_array_index (group->ports, GstLV2Port, i).position; } return positions; } static void gst_lv2_base_init (gpointer g_class) { GstLV2Class *klass = (GstLV2Class *) g_class; GstElementClass *element_class = GST_ELEMENT_CLASS (g_class); GstSignalProcessorClass *gsp_class = GST_SIGNAL_PROCESSOR_CLASS (g_class); SLV2Plugin lv2plugin; SLV2Value val; SLV2Values values, sub_values; GstLV2Group *group = NULL; GstAudioChannelPosition position = GST_AUDIO_CHANNEL_POSITION_INVALID; guint j, in_pad_index = 0, out_pad_index = 0; const gchar *klass_tags; gchar *longname, *author; lv2plugin = (SLV2Plugin) g_type_get_qdata (G_OBJECT_CLASS_TYPE (klass), descriptor_quark); g_assert (lv2plugin); GST_DEBUG ("base_init %p, plugin %s", g_class, slv2_value_as_string (slv2_plugin_get_uri (lv2plugin))); gsp_class->num_group_in = 0; gsp_class->num_group_out = 0; gsp_class->num_audio_in = 0; gsp_class->num_audio_out = 0; gsp_class->num_control_in = 0; gsp_class->num_control_out = 0; klass->in_groups = g_array_new (FALSE, TRUE, sizeof (GstLV2Group)); klass->out_groups = g_array_new (FALSE, TRUE, sizeof (GstLV2Group)); klass->audio_in_ports = g_array_new (FALSE, TRUE, sizeof (GstLV2Port)); klass->audio_out_ports = g_array_new (FALSE, TRUE, sizeof (GstLV2Port)); klass->control_in_ports = g_array_new (FALSE, TRUE, sizeof (GstLV2Port)); klass->control_out_ports = g_array_new (FALSE, TRUE, sizeof (GstLV2Port)); /* find ports and groups */ for (j = 0; j < slv2_plugin_get_num_ports (lv2plugin); j++) { const SLV2Port port = slv2_plugin_get_port_by_index (lv2plugin, j); const gboolean is_input = slv2_port_is_a (lv2plugin, port, input_class); gboolean in_group = FALSE; struct _GstLV2Port desc = { j, 0, }; values = slv2_port_get_value (lv2plugin, port, in_group_pred); if (slv2_values_size (values) > 0) { /* port is part of a group */ SLV2Value group_uri = slv2_values_get_at (values, 0); GArray *groups = is_input ? klass->in_groups : klass->out_groups; GstLV2Group *group = gst_lv2_class_find_group (groups, group_uri); in_group = TRUE; if (group == NULL) { GstLV2Group g; g.uri = slv2_value_duplicate (group_uri); g.pad = is_input ? in_pad_index++ : out_pad_index++; g.ports = g_array_new (FALSE, TRUE, sizeof (GstLV2Port)); g.has_roles = TRUE; g.symbol = NULL; sub_values = slv2_plugin_get_value_for_subject (lv2plugin, group_uri, lv2_symbol_pred); /* symbol is mandatory */ if (slv2_values_size (sub_values) > 0) { g.symbol = slv2_value_duplicate (slv2_values_get_at (sub_values, 0)); if (!gst_element_class_get_pad_template (element_class, slv2_value_as_string (g.symbol))) { g_array_append_val (groups, g); group = &g_array_index (groups, GstLV2Group, groups->len - 1); assert (group); assert (slv2_value_equals (group->uri, group_uri)); } else { GST_WARNING ("plugin %s has duplicate group symbol '%s'", slv2_value_as_string (slv2_plugin_get_uri (lv2plugin)), slv2_value_as_string (g.symbol)); in_group = FALSE; } } else { GST_WARNING ("plugin %s has illegal group with no symbol", slv2_value_as_string (slv2_plugin_get_uri (lv2plugin))); in_group = FALSE; } } if (in_group) { position = GST_AUDIO_CHANNEL_POSITION_INVALID; sub_values = slv2_port_get_value (lv2plugin, port, has_role_pred); if (slv2_values_size (sub_values) > 0) { SLV2Value role = slv2_values_get_at (sub_values, 0); position = gst_lv2_role_to_position (role); } slv2_values_free (sub_values); if (position != GST_AUDIO_CHANNEL_POSITION_INVALID) { desc.position = position; g_array_append_val (group->ports, desc); } else { in_group = FALSE; } } } if (!in_group) { /* port is not part of a group, or it is part of a group but that group * is illegal so we just ignore it */ if (slv2_port_is_a (lv2plugin, port, audio_class)) { desc.pad = is_input ? in_pad_index++ : out_pad_index++; if (is_input) g_array_append_val (klass->audio_in_ports, desc); else g_array_append_val (klass->audio_out_ports, desc); } else if (slv2_port_is_a (lv2plugin, port, control_class)) { if (is_input) g_array_append_val (klass->control_in_ports, desc); else g_array_append_val (klass->control_out_ports, desc); } else { /* unknown port type */ GST_INFO ("unhandled port %d", j); continue; } } slv2_values_free (values); } gsp_class->num_group_in = klass->in_groups->len; gsp_class->num_group_out = klass->out_groups->len; gsp_class->num_audio_in = klass->audio_in_ports->len; gsp_class->num_audio_out = klass->audio_out_ports->len; gsp_class->num_control_in = klass->control_in_ports->len; gsp_class->num_control_out = klass->control_out_ports->len; /* add input group pad templates */ for (j = 0; j < gsp_class->num_group_in; ++j) { group = &g_array_index (klass->in_groups, GstLV2Group, j); gst_signal_processor_class_add_pad_template (gsp_class, slv2_value_as_string (group->symbol), GST_PAD_SINK, j, group->ports->len); } /* add output group pad templates */ for (j = 0; j < gsp_class->num_group_out; ++j) { group = &g_array_index (klass->out_groups, GstLV2Group, j); gst_signal_processor_class_add_pad_template (gsp_class, slv2_value_as_string (group->symbol), GST_PAD_SRC, j, group->ports->len); } /* add non-grouped input port pad templates */ for (j = 0; j < gsp_class->num_audio_in; ++j) { struct _GstLV2Port *desc = &g_array_index (klass->audio_in_ports, GstLV2Port, j); SLV2Port port = slv2_plugin_get_port_by_index (lv2plugin, desc->index); const gchar *name = slv2_value_as_string (slv2_port_get_symbol (lv2plugin, port)); gst_signal_processor_class_add_pad_template (gsp_class, name, GST_PAD_SINK, j, 1); } /* add non-grouped output port pad templates */ for (j = 0; j < gsp_class->num_audio_out; ++j) { struct _GstLV2Port *desc = &g_array_index (klass->audio_out_ports, GstLV2Port, j); SLV2Port port = slv2_plugin_get_port_by_index (lv2plugin, desc->index); const gchar *name = slv2_value_as_string (slv2_port_get_symbol (lv2plugin, port)); gst_signal_processor_class_add_pad_template (gsp_class, name, GST_PAD_SRC, j, 1); } val = slv2_plugin_get_name (lv2plugin); if (val) { longname = g_strdup (slv2_value_as_string (val)); slv2_value_free (val); } else { longname = g_strdup ("no description available"); } val = slv2_plugin_get_author_name (lv2plugin); if (val) { author = g_strdup (slv2_value_as_string (val)); slv2_value_free (val); } else { author = g_strdup ("no author available"); } if (gsp_class->num_audio_in == 0) klass_tags = "Source/Audio/LV2"; else if (gsp_class->num_audio_out == 0) { if (gsp_class->num_control_out == 0) klass_tags = "Sink/Audio/LV2"; else klass_tags = "Sink/Analyzer/Audio/LV2"; } else klass_tags = "Filter/Effect/Audio/LV2"; GST_INFO ("tags : %s", klass_tags); gst_element_class_set_metadata (element_class, longname, klass_tags, longname, author); g_free (longname); g_free (author); if (!slv2_plugin_has_feature (lv2plugin, in_place_broken_pred)) GST_SIGNAL_PROCESSOR_CLASS_SET_CAN_PROCESS_IN_PLACE (klass); klass->plugin = lv2plugin; } static gchar * gst_lv2_class_get_param_name (GstLV2Class * klass, SLV2Port port) { SLV2Plugin lv2plugin = klass->plugin; gchar *ret; ret = g_strdup (slv2_value_as_string (slv2_port_get_symbol (lv2plugin, port))); /* this is the same thing that param_spec_* will do */ g_strcanon (ret, G_CSET_A_2_Z G_CSET_a_2_z G_CSET_DIGITS "-", '-'); /* satisfy glib2 (argname[0] must be [A-Za-z]) */ if (!((ret[0] >= 'a' && ret[0] <= 'z') || (ret[0] >= 'A' && ret[0] <= 'Z'))) { gchar *tempstr = ret; ret = g_strconcat ("param-", ret, NULL); g_free (tempstr); } /* check for duplicate property names */ if (g_object_class_find_property (G_OBJECT_CLASS (klass), ret)) { gint n = 1; gchar *nret = g_strdup_printf ("%s-%d", ret, n++); while (g_object_class_find_property (G_OBJECT_CLASS (klass), nret)) { g_free (nret); nret = g_strdup_printf ("%s-%d", ret, n++); } g_free (ret); ret = nret; } GST_DEBUG ("built property name '%s' from port name '%s'", ret, slv2_value_as_string (slv2_port_get_symbol (lv2plugin, port))); return ret; } static gchar * gst_lv2_class_get_param_nick (GstLV2Class * klass, SLV2Port port) { SLV2Plugin lv2plugin = klass->plugin; return g_strdup (slv2_value_as_string (slv2_port_get_name (lv2plugin, port))); } static GParamSpec * gst_lv2_class_get_param_spec (GstLV2Class * klass, gint portnum) { SLV2Plugin lv2plugin = klass->plugin; SLV2Port port = slv2_plugin_get_port_by_index (lv2plugin, portnum); SLV2Value lv2def, lv2min, lv2max; GParamSpec *ret; gchar *name, *nick; gint perms; gfloat lower = 0.0f, upper = 1.0f, def = 0.0f; nick = gst_lv2_class_get_param_nick (klass, port); name = gst_lv2_class_get_param_name (klass, port); GST_DEBUG ("%s trying port %s : %s", slv2_value_as_string (slv2_plugin_get_uri (lv2plugin)), name, nick); perms = G_PARAM_READABLE; if (slv2_port_is_a (lv2plugin, port, input_class)) perms |= G_PARAM_WRITABLE | G_PARAM_CONSTRUCT; if (slv2_port_is_a (lv2plugin, port, control_class)) perms |= GST_PARAM_CONTROLLABLE; if (slv2_port_has_property (lv2plugin, port, toggled_prop)) { ret = g_param_spec_boolean (name, nick, nick, FALSE, perms); goto done; } slv2_port_get_range (lv2plugin, port, &lv2def, &lv2min, &lv2max); if (lv2def) def = slv2_value_as_float (lv2def); if (lv2min) lower = slv2_value_as_float (lv2min); if (lv2max) upper = slv2_value_as_float (lv2max); slv2_value_free (lv2def); slv2_value_free (lv2min); slv2_value_free (lv2max); if (def < lower) { GST_WARNING ("%s has lower bound %f > default %f", slv2_value_as_string (slv2_plugin_get_uri (lv2plugin)), lower, def); lower = def; } if (def > upper) { GST_WARNING ("%s has upper bound %f < default %f", slv2_value_as_string (slv2_plugin_get_uri (lv2plugin)), upper, def); upper = def; } if (slv2_port_has_property (lv2plugin, port, integer_prop)) ret = g_param_spec_int (name, nick, nick, lower, upper, def, perms); else ret = g_param_spec_float (name, nick, nick, lower, upper, def, perms); done: g_free (name); g_free (nick); return ret; } static void gst_lv2_class_init (GstLV2Class * klass, SLV2Plugin lv2plugin) { GObjectClass *gobject_class; GstSignalProcessorClass *gsp_class; GParamSpec *p; gint i, ix; GST_DEBUG ("class_init %p", klass); gobject_class = (GObjectClass *) klass; gobject_class->set_property = gst_lv2_set_property; gobject_class->get_property = gst_lv2_get_property; gsp_class = GST_SIGNAL_PROCESSOR_CLASS (klass); gsp_class->setup = gst_lv2_setup; gsp_class->start = gst_lv2_start; gsp_class->stop = gst_lv2_stop; gsp_class->cleanup = gst_lv2_cleanup; gsp_class->process = gst_lv2_process; klass->plugin = lv2plugin; /* properties have an offset of 1 */ ix = 1; /* register properties */ for (i = 0; i < gsp_class->num_control_in; i++, ix++) { p = gst_lv2_class_get_param_spec (klass, g_array_index (klass->control_in_ports, GstLV2Port, i).index); g_object_class_install_property (gobject_class, ix, p); } for (i = 0; i < gsp_class->num_control_out; i++, ix++) { p = gst_lv2_class_get_param_spec (klass, g_array_index (klass->control_out_ports, GstLV2Port, i).index); g_object_class_install_property (gobject_class, ix, p); } } static void gst_lv2_init (GstLV2 * lv2, GstLV2Class * klass) { lv2->plugin = klass->plugin; lv2->instance = NULL; lv2->activated = FALSE; } static void gst_lv2_set_property (GObject * object, guint prop_id, const GValue * value, GParamSpec * pspec) { GstSignalProcessor *gsp; GstSignalProcessorClass *gsp_class; gsp = GST_SIGNAL_PROCESSOR (object); gsp_class = GST_SIGNAL_PROCESSOR_GET_CLASS (object); /* remember, properties have an offset of 1 */ prop_id--; /* only input ports */ g_return_if_fail (prop_id < gsp_class->num_control_in); /* now see what type it is */ switch (pspec->value_type) { case G_TYPE_BOOLEAN: gsp->control_in[prop_id] = g_value_get_boolean (value) ? 0.0f : 1.0f; break; case G_TYPE_INT: gsp->control_in[prop_id] = g_value_get_int (value); break; case G_TYPE_FLOAT: gsp->control_in[prop_id] = g_value_get_float (value); break; default: g_assert_not_reached (); } } static void gst_lv2_get_property (GObject * object, guint prop_id, GValue * value, GParamSpec * pspec) { GstSignalProcessor *gsp; GstSignalProcessorClass *gsp_class; gfloat *controls; gsp = GST_SIGNAL_PROCESSOR (object); gsp_class = GST_SIGNAL_PROCESSOR_GET_CLASS (object); /* remember, properties have an offset of 1 */ prop_id--; if (prop_id < gsp_class->num_control_in) { controls = gsp->control_in; } else if (prop_id < gsp_class->num_control_in + gsp_class->num_control_out) { controls = gsp->control_out; prop_id -= gsp_class->num_control_in; } else { g_return_if_reached (); } /* now see what type it is */ switch (pspec->value_type) { case G_TYPE_BOOLEAN: g_value_set_boolean (value, controls[prop_id] > 0.0f); break; case G_TYPE_INT: g_value_set_int (value, CLAMP (controls[prop_id], G_MININT, G_MAXINT)); break; case G_TYPE_FLOAT: g_value_set_float (value, controls[prop_id]); break; default: g_return_if_reached (); } } static gboolean gst_lv2_setup (GstSignalProcessor * gsp, GstCaps * caps) { GstLV2 *lv2; GstLV2Class *oclass; GstSignalProcessorClass *gsp_class; GstStructure *s; gint i; GstLV2Group *group = NULL; GstAudioChannelPosition *positions = NULL; GstPad *pad; gsp_class = GST_SIGNAL_PROCESSOR_GET_CLASS (gsp); lv2 = (GstLV2 *) gsp; oclass = (GstLV2Class *) gsp_class; g_return_val_if_fail (lv2->activated == FALSE, FALSE); GST_DEBUG_OBJECT (lv2, "instantiating the plugin at %d Hz", gsp->sample_rate); if (!(lv2->instance = slv2_plugin_instantiate (oclass->plugin, gsp->sample_rate, NULL))) goto no_instance; /* connect the control ports */ for (i = 0; i < gsp_class->num_control_in; i++) slv2_instance_connect_port (lv2->instance, g_array_index (oclass->control_in_ports, GstLV2Port, i).index, &(gsp->control_in[i])); for (i = 0; i < gsp_class->num_control_out; i++) slv2_instance_connect_port (lv2->instance, g_array_index (oclass->control_out_ports, GstLV2Port, i).index, &(gsp->control_out[i])); /* set input group pad audio channel position */ for (i = 0; i < gsp_class->num_group_in; ++i) { group = &g_array_index (oclass->in_groups, GstLV2Group, i); if (group->has_roles) { if ((positions = gst_lv2_build_positions (group))) { if ((pad = gst_element_get_static_pad (GST_ELEMENT (gsp), slv2_value_as_string (group->symbol)))) { GST_INFO_OBJECT (lv2, "set audio channel positions on sink pad %s", slv2_value_as_string (group->symbol)); s = gst_caps_get_structure (caps, 0); gst_audio_set_channel_positions (s, positions); gst_object_unref (pad); } g_free (positions); positions = NULL; } } } /* set output group pad audio channel position */ for (i = 0; i < gsp_class->num_group_out; ++i) { group = &g_array_index (oclass->out_groups, GstLV2Group, i); if (group->has_roles) { if ((positions = gst_lv2_build_positions (group))) { if ((pad = gst_element_get_static_pad (GST_ELEMENT (gsp), slv2_value_as_string (group->symbol)))) { GST_INFO_OBJECT (lv2, "set audio channel positions on src pad %s", slv2_value_as_string (group->symbol)); s = gst_caps_get_structure (caps, 0); gst_audio_set_channel_positions (s, positions); gst_object_unref (pad); } g_free (positions); positions = NULL; } } } return TRUE; no_instance: { GST_WARNING_OBJECT (gsp, "could not create instance"); return FALSE; } } static gboolean gst_lv2_start (GstSignalProcessor * gsp) { GstLV2 *lv2 = (GstLV2 *) gsp; g_return_val_if_fail (lv2->activated == FALSE, FALSE); g_return_val_if_fail (lv2->instance != NULL, FALSE); GST_DEBUG_OBJECT (lv2, "activating"); slv2_instance_activate (lv2->instance); lv2->activated = TRUE; return TRUE; } static void gst_lv2_stop (GstSignalProcessor * gsp) { GstLV2 *lv2 = (GstLV2 *) gsp; g_return_if_fail (lv2->activated == TRUE); g_return_if_fail (lv2->instance != NULL); GST_DEBUG_OBJECT (lv2, "deactivating"); slv2_instance_deactivate (lv2->instance); lv2->activated = FALSE; } static void gst_lv2_cleanup (GstSignalProcessor * gsp) { GstLV2 *lv2 = (GstLV2 *) gsp; g_return_if_fail (lv2->activated == FALSE); g_return_if_fail (lv2->instance != NULL); GST_DEBUG_OBJECT (lv2, "cleaning up"); slv2_instance_free (lv2->instance); lv2->instance = NULL; } static void gst_lv2_process (GstSignalProcessor * gsp, guint nframes) { GstSignalProcessorClass *gsp_class; GstLV2 *lv2; GstLV2Class *lv2_class; GstLV2Group *lv2_group; GstLV2Port *lv2_port; GstSignalProcessorGroup *gst_group; guint i, j; gsp_class = GST_SIGNAL_PROCESSOR_GET_CLASS (gsp); lv2 = (GstLV2 *) gsp; lv2_class = (GstLV2Class *) gsp_class; /* multi channel inputs */ for (i = 0; i < gsp_class->num_group_in; i++) { lv2_group = &g_array_index (lv2_class->in_groups, GstLV2Group, i); gst_group = &gsp->group_in[i]; for (j = 0; j < lv2_group->ports->len; ++j) { lv2_port = &g_array_index (lv2_group->ports, GstLV2Port, j); slv2_instance_connect_port (lv2->instance, lv2_port->index, gst_group->buffer + (j * nframes)); } } /* mono inputs */ for (i = 0; i < gsp_class->num_audio_in; i++) { lv2_port = &g_array_index (lv2_class->audio_in_ports, GstLV2Port, i); slv2_instance_connect_port (lv2->instance, lv2_port->index, gsp->audio_in[i]); } /* multi channel outputs */ for (i = 0; i < gsp_class->num_group_out; i++) { lv2_group = &g_array_index (lv2_class->out_groups, GstLV2Group, i); gst_group = &gsp->group_out[i]; for (j = 0; j < lv2_group->ports->len; ++j) { lv2_port = &g_array_index (lv2_group->ports, GstLV2Port, j); slv2_instance_connect_port (lv2->instance, lv2_port->index, gst_group->buffer + (j * nframes)); } } /* mono outputs */ for (i = 0; i < gsp_class->num_audio_out; i++) { lv2_port = &g_array_index (lv2_class->audio_out_ports, GstLV2Port, i); slv2_instance_connect_port (lv2->instance, lv2_port->index, gsp->audio_out[i]); } slv2_instance_run (lv2->instance, nframes); } /* search the plugin path */ static gboolean lv2_plugin_discover (void) { guint i, j; SLV2Plugins plugins = slv2_world_get_all_plugins (world); for (i = 0; i < slv2_plugins_size (plugins); ++i) { SLV2Plugin lv2plugin = slv2_plugins_get_at (plugins, i); gint num_audio_ports = 0; const gchar *plugin_uri, *p; gchar *type_name; GTypeInfo typeinfo = { sizeof (GstLV2Class), (GBaseInitFunc) gst_lv2_base_init, NULL, (GClassInitFunc) gst_lv2_class_init, NULL, lv2plugin, sizeof (GstLV2), 0, (GInstanceInitFunc) gst_lv2_init, }; GType type; plugin_uri = slv2_value_as_uri (slv2_plugin_get_uri (lv2plugin)); /* construct the type name from plugin URI */ if ((p = strstr (plugin_uri, "://"))) { /* cut off the protocol (e.g. http://) */ type_name = g_strdup (&p[3]); } else { type_name = g_strdup (plugin_uri); } g_strcanon (type_name, G_CSET_A_2_Z G_CSET_a_2_z G_CSET_DIGITS "-+", '-'); /* if it's already registered, drop it */ if (g_type_from_name (type_name)) goto next; /* check if this has any audio ports */ for (j = 0; j < slv2_plugin_get_num_ports (lv2plugin); j++) { const SLV2Port port = slv2_plugin_get_port_by_index (lv2plugin, j); if (slv2_port_is_a (lv2plugin, port, audio_class)) { num_audio_ports++; } } if (!num_audio_ports) { GST_INFO ("plugin %s has no audio ports", type_name); goto next; } /* create the type */ type = g_type_register_static (GST_TYPE_SIGNAL_PROCESSOR, type_name, &typeinfo, 0); /* FIXME: not needed anymore when we can add pad templates, etc in class_init * as class_data contains the LADSPA_Descriptor too */ g_type_set_qdata (type, descriptor_quark, (gpointer) lv2plugin); if (!gst_element_register (gst_lv2_plugin, type_name, GST_RANK_NONE, type)) goto next; next: g_free (type_name); } return TRUE; } static gboolean plugin_init (GstPlugin * plugin) { GST_DEBUG_CATEGORY_INIT (lv2_debug, "lv2", GST_DEBUG_FG_GREEN | GST_DEBUG_BG_BLACK | GST_DEBUG_BOLD, "LV2"); world = slv2_world_new (); slv2_world_load_all (world); audio_class = slv2_value_new_uri (world, SLV2_PORT_CLASS_AUDIO); control_class = slv2_value_new_uri (world, SLV2_PORT_CLASS_CONTROL); input_class = slv2_value_new_uri (world, SLV2_PORT_CLASS_INPUT); output_class = slv2_value_new_uri (world, SLV2_PORT_CLASS_OUTPUT); #define NS_LV2 "http://lv2plug.in/ns/lv2core#" #define NS_PG "http://lv2plug.in/ns/ext/port-groups" integer_prop = slv2_value_new_uri (world, NS_LV2 "integer"); toggled_prop = slv2_value_new_uri (world, NS_LV2 "toggled"); in_place_broken_pred = slv2_value_new_uri (world, NS_LV2 "inPlaceBroken"); in_group_pred = slv2_value_new_uri (world, NS_PG "inGroup"); has_role_pred = slv2_value_new_uri (world, NS_PG "role"); lv2_symbol_pred = slv2_value_new_string (world, NS_LV2 "symbol"); center_role = slv2_value_new_uri (world, NS_PG "centerChannel"); left_role = slv2_value_new_uri (world, NS_PG "leftChannel"); right_role = slv2_value_new_uri (world, NS_PG "rightChannel"); rear_center_role = slv2_value_new_uri (world, NS_PG "rearCenterChannel"); rear_left_role = slv2_value_new_uri (world, NS_PG "rearLeftChannel"); rear_right_role = slv2_value_new_uri (world, NS_PG "rearRightChannel"); lfe_role = slv2_value_new_uri (world, NS_PG "lfeChannel"); center_left_role = slv2_value_new_uri (world, NS_PG "centerLeftChannel"); center_right_role = slv2_value_new_uri (world, NS_PG "centerRightChannel"); side_left_role = slv2_value_new_uri (world, NS_PG "sideLeftChannel"); side_right_role = slv2_value_new_uri (world, NS_PG "sideRightChannel"); gst_plugin_add_dependency_simple (plugin, "LV2_PATH", GST_LV2_DEFAULT_PATH, NULL, GST_PLUGIN_DEPENDENCY_FLAG_NONE); parent_class = g_type_class_ref (GST_TYPE_SIGNAL_PROCESSOR); gst_lv2_plugin = plugin; descriptor_quark = g_quark_from_static_string ("slv2-plugin"); /* ensure GstAudioChannelPosition type is registered */ if (!gst_audio_channel_position_get_type ()) return FALSE; if (!lv2_plugin_discover ()) { GST_WARNING ("no lv2 plugins found, check LV2_PATH"); } /* we don't want to fail, even if there are no elements registered */ return TRUE; } #ifdef __GNUC__ __attribute__ ((destructor)) #endif static void plugin_cleanup (GstPlugin * plugin) { slv2_value_free (audio_class); slv2_value_free (control_class); slv2_value_free (input_class); slv2_value_free (output_class); slv2_value_free (integer_prop); slv2_value_free (toggled_prop); slv2_value_free (in_place_broken_pred); slv2_value_free (in_group_pred); slv2_value_free (has_role_pred); slv2_value_free (lv2_symbol_pred); slv2_value_free (center_role); slv2_value_free (left_role); slv2_value_free (right_role); slv2_value_free (rear_center_role); slv2_value_free (rear_left_role); slv2_value_free (rear_right_role); slv2_value_free (lfe_role); slv2_value_free (center_left_role); slv2_value_free (center_right_role); slv2_value_free (side_left_role); slv2_value_free (side_right_role); slv2_world_free (world); } GST_PLUGIN_DEFINE (GST_VERSION_MAJOR, GST_VERSION_MINOR, lv2, "All LV2 plugins", plugin_init, VERSION, GST_LICENSE, GST_PACKAGE_NAME, GST_PACKAGE_ORIGIN)