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952 lines
30 KiB
C
952 lines
30 KiB
C
/* GStreamer
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* Copyright (C) 1999 Erik Walthinsen <omega@cse.ogi.edu>
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* 2001 Steve Baker <stevebaker_org@yahoo.co.uk>
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* 2003 Andy Wingo <wingo at pobox.com>
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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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/**
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* SECTION:element-lv2
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* @short_description: bridge for LV2.
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*
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* LV2 is a standard for plugins and matching host applications,
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* mainly targeted at audio processing and generation. It is intended as
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* a successor to LADSPA (Linux Audio Developer's Simple Plugin API).
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*
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* The LV2 element is a bridge for plugins using the
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* <ulink url="http://www.lv2plug.in/">LV2</ulink> API. It scans all
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* installed LV2 plugins and registers them as gstreamer elements.
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include <string.h>
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#include <math.h>
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#include <glib.h>
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#include <gst/audio/audio.h>
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#include <gst/audio/multichannel.h>
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#include "gstlv2.h"
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#include <slv2/slv2.h>
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#define GST_LV2_DEFAULT_PATH \
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"/usr/lib/lv2" G_SEARCHPATH_SEPARATOR_S \
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"/usr/local/lib/lv2" G_SEARCHPATH_SEPARATOR_S \
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LIBDIR "/lv2"
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static void gst_lv2_set_property (GObject * object,
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guint prop_id, const GValue * value, GParamSpec * pspec);
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static void gst_lv2_get_property (GObject * object,
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guint prop_id, GValue * value, GParamSpec * pspec);
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static gboolean gst_lv2_setup (GstSignalProcessor * sigproc, GstCaps * caps);
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static gboolean gst_lv2_start (GstSignalProcessor * sigproc);
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static void gst_lv2_stop (GstSignalProcessor * sigproc);
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static void gst_lv2_cleanup (GstSignalProcessor * sigproc);
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static void gst_lv2_process (GstSignalProcessor * sigproc, guint nframes);
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static SLV2World world;
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static SLV2Value audio_class;
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static SLV2Value control_class;
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static SLV2Value input_class;
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static SLV2Value output_class;
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static SLV2Value integer_prop;
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static SLV2Value toggled_prop;
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static SLV2Value in_place_broken_pred;
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static SLV2Value in_group_pred;
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static SLV2Value has_role_pred;
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static SLV2Value lv2_symbol_pred;
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static SLV2Value center_role;
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static SLV2Value left_role;
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static SLV2Value right_role;
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static SLV2Value rear_center_role;
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static SLV2Value rear_left_role;
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static SLV2Value rear_right_role;
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static SLV2Value lfe_role;
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static SLV2Value center_left_role;
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static SLV2Value center_right_role;
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static SLV2Value side_left_role;
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static SLV2Value side_right_role;
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static GstSignalProcessorClass *parent_class;
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static GstPlugin *gst_lv2_plugin;
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GST_DEBUG_CATEGORY_STATIC (lv2_debug);
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#define GST_CAT_DEFAULT lv2_debug
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static GQuark descriptor_quark = 0;
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/* Convert an LV2 port role to a Gst channel positon
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* WARNING: If the group has only a single port,
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* GST_AUDIO_CHANNEL_POSITION_FRONT_CENTER will be returned for pg:centerRole
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* (which is used by LV2 for mono groups), but this is not correct. In this
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* case the value must be changed to GST_AUDIO_CHANNEL_POSITION_FRONT_MONO
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* (this can't be done by this function because this information isn't known
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* at the time it is used).
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*/
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static GstAudioChannelPosition
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gst_lv2_role_to_position (SLV2Value role)
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{
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/* Front. Mono and left/right are mututally exclusive */
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if (slv2_value_equals (role, center_role)) {
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return GST_AUDIO_CHANNEL_POSITION_FRONT_CENTER;
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} else if (slv2_value_equals (role, left_role)) {
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return GST_AUDIO_CHANNEL_POSITION_FRONT_LEFT;
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} else if (slv2_value_equals (role, right_role)) {
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return GST_AUDIO_CHANNEL_POSITION_FRONT_RIGHT;
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/* Rear. Left/right and center are mututally exclusive */
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} else if (slv2_value_equals (role, rear_center_role)) {
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return GST_AUDIO_CHANNEL_POSITION_REAR_CENTER;
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} else if (slv2_value_equals (role, rear_left_role)) {
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return GST_AUDIO_CHANNEL_POSITION_REAR_LEFT;
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} else if (slv2_value_equals (role, rear_right_role)) {
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return GST_AUDIO_CHANNEL_POSITION_REAR_RIGHT;
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/* Subwoofer/low-frequency-effects */
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} else if (slv2_value_equals (role, lfe_role)) {
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return GST_AUDIO_CHANNEL_POSITION_LFE;
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/* Center front speakers. Center and left/right_of_center
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* are mutually exclusive */
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} else if (slv2_value_equals (role, center_left_role)) {
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return GST_AUDIO_CHANNEL_POSITION_FRONT_LEFT_OF_CENTER;
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} else if (slv2_value_equals (role, center_right_role)) {
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return GST_AUDIO_CHANNEL_POSITION_FRONT_RIGHT_OF_CENTER;
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/* sides */
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} else if (slv2_value_equals (role, side_left_role)) {
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return GST_AUDIO_CHANNEL_POSITION_SIDE_LEFT;
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} else if (slv2_value_equals (role, side_right_role)) {
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return GST_AUDIO_CHANNEL_POSITION_SIDE_RIGHT;
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}
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return GST_AUDIO_CHANNEL_POSITION_INVALID;
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}
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/* Find and return the group @a uri in @a groups, or NULL if not found */
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static GstLV2Group *
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gst_lv2_class_find_group (GArray * groups, SLV2Value uri)
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{
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int i = 0;
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for (; i < groups->len; ++i)
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if (slv2_value_equals (g_array_index (groups, GstLV2Group, i).uri, uri))
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return &g_array_index (groups, GstLV2Group, i);
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return NULL;
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}
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static GstAudioChannelPosition *
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gst_lv2_build_positions (GstLV2Group * group)
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{
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GstAudioChannelPosition *positions = NULL;
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/* don't do anything for mono */
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if (group->ports->len > 1) {
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gint i;
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positions = g_new (GstAudioChannelPosition, group->ports->len);
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for (i = 0; i < group->ports->len; ++i)
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positions[i] = g_array_index (group->ports, GstLV2Port, i).position;
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}
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return positions;
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}
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static void
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gst_lv2_base_init (gpointer g_class)
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{
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GstLV2Class *klass = (GstLV2Class *) g_class;
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GstElementClass *element_class = GST_ELEMENT_CLASS (g_class);
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GstSignalProcessorClass *gsp_class = GST_SIGNAL_PROCESSOR_CLASS (g_class);
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SLV2Plugin lv2plugin;
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SLV2Value val;
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SLV2Values values, sub_values;
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GstLV2Group *group = NULL;
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GstAudioChannelPosition position = GST_AUDIO_CHANNEL_POSITION_INVALID;
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guint j, in_pad_index = 0, out_pad_index = 0;
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const gchar *klass_tags;
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gchar *longname, *author;
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lv2plugin = (SLV2Plugin) g_type_get_qdata (G_OBJECT_CLASS_TYPE (klass),
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descriptor_quark);
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g_assert (lv2plugin);
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GST_DEBUG ("base_init %p, plugin %s", g_class,
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slv2_value_as_string (slv2_plugin_get_uri (lv2plugin)));
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gsp_class->num_group_in = 0;
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gsp_class->num_group_out = 0;
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gsp_class->num_audio_in = 0;
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gsp_class->num_audio_out = 0;
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gsp_class->num_control_in = 0;
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gsp_class->num_control_out = 0;
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klass->in_groups = g_array_new (FALSE, TRUE, sizeof (GstLV2Group));
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klass->out_groups = g_array_new (FALSE, TRUE, sizeof (GstLV2Group));
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klass->audio_in_ports = g_array_new (FALSE, TRUE, sizeof (GstLV2Port));
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klass->audio_out_ports = g_array_new (FALSE, TRUE, sizeof (GstLV2Port));
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klass->control_in_ports = g_array_new (FALSE, TRUE, sizeof (GstLV2Port));
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klass->control_out_ports = g_array_new (FALSE, TRUE, sizeof (GstLV2Port));
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/* find ports and groups */
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for (j = 0; j < slv2_plugin_get_num_ports (lv2plugin); j++) {
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const SLV2Port port = slv2_plugin_get_port_by_index (lv2plugin, j);
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const gboolean is_input = slv2_port_is_a (lv2plugin, port, input_class);
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gboolean in_group = FALSE;
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struct _GstLV2Port desc = { j, 0, };
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values = slv2_port_get_value (lv2plugin, port, in_group_pred);
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if (slv2_values_size (values) > 0) {
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/* port is part of a group */
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SLV2Value group_uri = slv2_values_get_at (values, 0);
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GArray *groups = is_input ? klass->in_groups : klass->out_groups;
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GstLV2Group *group = gst_lv2_class_find_group (groups, group_uri);
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in_group = TRUE;
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if (group == NULL) {
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GstLV2Group g;
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g.uri = slv2_value_duplicate (group_uri);
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g.pad = is_input ? in_pad_index++ : out_pad_index++;
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g.ports = g_array_new (FALSE, TRUE, sizeof (GstLV2Port));
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g.has_roles = TRUE;
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g.symbol = NULL;
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sub_values = slv2_plugin_get_value_for_subject (lv2plugin, group_uri,
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lv2_symbol_pred);
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/* symbol is mandatory */
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if (slv2_values_size (sub_values) > 0) {
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g.symbol = slv2_value_duplicate (slv2_values_get_at (sub_values, 0));
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if (!gst_element_class_get_pad_template (element_class,
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slv2_value_as_string (g.symbol))) {
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g_array_append_val (groups, g);
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group = &g_array_index (groups, GstLV2Group, groups->len - 1);
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assert (group);
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assert (slv2_value_equals (group->uri, group_uri));
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} else {
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GST_WARNING ("plugin %s has duplicate group symbol '%s'",
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slv2_value_as_string (slv2_plugin_get_uri (lv2plugin)),
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slv2_value_as_string (g.symbol));
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in_group = FALSE;
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}
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} else {
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GST_WARNING ("plugin %s has illegal group with no symbol",
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slv2_value_as_string (slv2_plugin_get_uri (lv2plugin)));
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in_group = FALSE;
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}
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}
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if (in_group) {
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position = GST_AUDIO_CHANNEL_POSITION_INVALID;
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sub_values = slv2_port_get_value (lv2plugin, port, has_role_pred);
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if (slv2_values_size (sub_values) > 0) {
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SLV2Value role = slv2_values_get_at (sub_values, 0);
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position = gst_lv2_role_to_position (role);
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}
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slv2_values_free (sub_values);
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if (position != GST_AUDIO_CHANNEL_POSITION_INVALID) {
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desc.position = position;
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g_array_append_val (group->ports, desc);
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} else {
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in_group = FALSE;
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}
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}
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}
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if (!in_group) {
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/* port is not part of a group, or it is part of a group but that group
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* is illegal so we just ignore it */
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if (slv2_port_is_a (lv2plugin, port, audio_class)) {
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desc.pad = is_input ? in_pad_index++ : out_pad_index++;
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if (is_input)
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g_array_append_val (klass->audio_in_ports, desc);
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else
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g_array_append_val (klass->audio_out_ports, desc);
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} else if (slv2_port_is_a (lv2plugin, port, control_class)) {
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if (is_input)
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g_array_append_val (klass->control_in_ports, desc);
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else
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g_array_append_val (klass->control_out_ports, desc);
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} else {
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/* unknown port type */
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GST_INFO ("unhandled port %d", j);
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continue;
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}
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}
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slv2_values_free (values);
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}
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gsp_class->num_group_in = klass->in_groups->len;
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gsp_class->num_group_out = klass->out_groups->len;
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gsp_class->num_audio_in = klass->audio_in_ports->len;
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gsp_class->num_audio_out = klass->audio_out_ports->len;
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gsp_class->num_control_in = klass->control_in_ports->len;
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gsp_class->num_control_out = klass->control_out_ports->len;
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/* add input group pad templates */
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for (j = 0; j < gsp_class->num_group_in; ++j) {
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group = &g_array_index (klass->in_groups, GstLV2Group, j);
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gst_signal_processor_class_add_pad_template (gsp_class,
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slv2_value_as_string (group->symbol), GST_PAD_SINK, j,
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group->ports->len);
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}
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/* add output group pad templates */
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for (j = 0; j < gsp_class->num_group_out; ++j) {
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group = &g_array_index (klass->out_groups, GstLV2Group, j);
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gst_signal_processor_class_add_pad_template (gsp_class,
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slv2_value_as_string (group->symbol), GST_PAD_SRC, j,
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group->ports->len);
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}
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/* add non-grouped input port pad templates */
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for (j = 0; j < gsp_class->num_audio_in; ++j) {
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struct _GstLV2Port *desc =
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&g_array_index (klass->audio_in_ports, GstLV2Port, j);
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SLV2Port port = slv2_plugin_get_port_by_index (lv2plugin, desc->index);
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const gchar *name =
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slv2_value_as_string (slv2_port_get_symbol (lv2plugin, port));
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gst_signal_processor_class_add_pad_template (gsp_class, name, GST_PAD_SINK,
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j, 1);
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}
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/* add non-grouped output port pad templates */
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for (j = 0; j < gsp_class->num_audio_out; ++j) {
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struct _GstLV2Port *desc =
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&g_array_index (klass->audio_out_ports, GstLV2Port, j);
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SLV2Port port = slv2_plugin_get_port_by_index (lv2plugin, desc->index);
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const gchar *name =
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slv2_value_as_string (slv2_port_get_symbol (lv2plugin, port));
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gst_signal_processor_class_add_pad_template (gsp_class, name, GST_PAD_SRC,
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j, 1);
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}
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val = slv2_plugin_get_name (lv2plugin);
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if (val) {
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longname = g_strdup (slv2_value_as_string (val));
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slv2_value_free (val);
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} else {
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longname = g_strdup ("no description available");
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}
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val = slv2_plugin_get_author_name (lv2plugin);
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if (val) {
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author = g_strdup (slv2_value_as_string (val));
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slv2_value_free (val);
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} else {
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author = g_strdup ("no author available");
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}
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if (gsp_class->num_audio_in == 0)
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klass_tags = "Source/Audio/LV2";
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else if (gsp_class->num_audio_out == 0) {
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if (gsp_class->num_control_out == 0)
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klass_tags = "Sink/Audio/LV2";
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else
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klass_tags = "Sink/Analyzer/Audio/LV2";
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} else
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klass_tags = "Filter/Effect/Audio/LV2";
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GST_INFO ("tags : %s", klass_tags);
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gst_element_class_set_metadata (element_class, longname,
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klass_tags, longname, author);
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g_free (longname);
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g_free (author);
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if (!slv2_plugin_has_feature (lv2plugin, in_place_broken_pred))
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GST_SIGNAL_PROCESSOR_CLASS_SET_CAN_PROCESS_IN_PLACE (klass);
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klass->plugin = lv2plugin;
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}
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static gchar *
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gst_lv2_class_get_param_name (GstLV2Class * klass, SLV2Port port)
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{
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SLV2Plugin lv2plugin = klass->plugin;
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gchar *ret;
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ret = g_strdup (slv2_value_as_string (slv2_port_get_symbol (lv2plugin,
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port)));
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/* this is the same thing that param_spec_* will do */
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g_strcanon (ret, G_CSET_A_2_Z G_CSET_a_2_z G_CSET_DIGITS "-", '-');
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/* satisfy glib2 (argname[0] must be [A-Za-z]) */
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if (!((ret[0] >= 'a' && ret[0] <= 'z') || (ret[0] >= 'A' && ret[0] <= 'Z'))) {
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gchar *tempstr = ret;
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ret = g_strconcat ("param-", ret, NULL);
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g_free (tempstr);
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}
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/* check for duplicate property names */
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if (g_object_class_find_property (G_OBJECT_CLASS (klass), ret)) {
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gint n = 1;
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gchar *nret = g_strdup_printf ("%s-%d", ret, n++);
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while (g_object_class_find_property (G_OBJECT_CLASS (klass), nret)) {
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g_free (nret);
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nret = g_strdup_printf ("%s-%d", ret, n++);
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}
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g_free (ret);
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ret = nret;
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}
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GST_DEBUG ("built property name '%s' from port name '%s'", ret,
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slv2_value_as_string (slv2_port_get_symbol (lv2plugin, port)));
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return ret;
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}
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static gchar *
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gst_lv2_class_get_param_nick (GstLV2Class * klass, SLV2Port port)
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{
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SLV2Plugin lv2plugin = klass->plugin;
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return g_strdup (slv2_value_as_string (slv2_port_get_name (lv2plugin, port)));
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}
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|
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)
|