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lv2: extract helper code into lv2utils

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This is a preparaton for adding lv2-sources and -sinks.
This commit is contained in:
Stefan Sauer 2016-04-08 07:53:44 +02:00
parent 38fd4f6148
commit a05f8ddb5d
4 changed files with 603 additions and 416 deletions
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4
ext/lv2/Makefile.am
View file

@ -1,6 +1,6 @@
plugin_LTLIBRARIES = libgstlv2.la
libgstlv2_la_SOURCES = gstlv2.c gstlv2filter.c
libgstlv2_la_SOURCES = gstlv2.c gstlv2utils.c gstlv2filter.c
libgstlv2_la_CFLAGS = \
-I$(top_srcdir)/gst-libs \
$(GST_AUDIO_CFLAGS) \
@ -15,4 +15,4 @@ libgstlv2_la_LIBADD = \
libgstlv2_la_LDFLAGS = $(GST_PLUGIN_LDFLAGS)
libgstlv2_la_LIBTOOLFLAGS = $(GST_PLUGIN_LIBTOOLFLAGS)
noinst_HEADERS = gstlv2.h
noinst_HEADERS = gstlv2.h gstlv2utils.h

477
ext/lv2/gstlv2filter.c
View file

@ -24,6 +24,7 @@
#include "config.h"
#endif
#include "gstlv2.h"
#include "gstlv2utils.h"
#include <string.h>
#include <math.h>
@ -51,58 +52,20 @@ typedef struct _lv2_control_info
typedef struct _GstLV2Filter GstLV2Filter;
typedef struct _GstLV2FilterClass GstLV2FilterClass;
typedef struct _GstLV2FilterGroup GstLV2FilterGroup;
typedef struct _GstLV2FilterPort GstLV2FilterPort;
struct _GstLV2Filter
{
GstAudioFilter parent;
LilvPlugin *plugin;
LilvInstance *instance;
gboolean activated;
/* TODO refactor in the same way as LADSPA plugin */
struct
{
struct
{
gfloat *in;
gfloat *out;
} control;
} ports;
};
struct _GstLV2FilterGroup
{
gchar *uri; /**< RDF resource (URI or blank node) */
guint pad; /**< Gst pad index */
gchar *symbol; /**< Gst pad name / LV2 group symbol */
GArray *ports; /**< Array of GstLV2FilterPort */
gboolean has_roles; /**< TRUE iff all ports have a known role */
};
struct _GstLV2FilterPort
{
gint index; /**< LV2 port index (on LV2 plugin) */
gint pad; /**< Gst pad index (iff not part of a group) */
LilvNode *role; /**< Channel position / port role */
GstAudioChannelPosition position; /**< Channel position */
GstLV2 lv2;
};
struct _GstLV2FilterClass
{
GstAudioFilterClass parent_class;
LilvPlugin *plugin;
GstLV2FilterGroup in_group; /**< Array of GstLV2FilterGroup */
GstLV2FilterGroup out_group; /**< Array of GstLV2FilterGroup */
GArray *control_in_ports; /**< Array of GstLV2FilterPort */
GArray *control_out_ports; /**< Array of GstLV2FilterPort */
GstLV2Class lv2;
};
static GstAudioFilter *parent_class = NULL;
@ -112,70 +75,28 @@ static void
gst_lv2_filter_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec)
{
GstLV2Filter *self = (GstLV2Filter *) (object);
GstLV2FilterClass *klass =
(GstLV2FilterClass *) GST_AUDIO_FILTER_GET_CLASS (object);
GstLV2Filter *self = (GstLV2Filter *) object;
/* remember, properties have an offset of 1 */
prop_id--;
/* only input ports */
g_return_if_fail (prop_id < klass->control_in_ports->len);
/* now see what type it is */
switch (pspec->value_type) {
case G_TYPE_BOOLEAN:
self->ports.control.in[prop_id] =
g_value_get_boolean (value) ? 0.0f : 1.0f;
break;
case G_TYPE_INT:
self->ports.control.in[prop_id] = g_value_get_int (value);
break;
case G_TYPE_FLOAT:
self->ports.control.in[prop_id] = g_value_get_float (value);
break;
default:
g_assert_not_reached ();
}
gst_lv2_object_set_property (&self->lv2, object, prop_id, value, pspec);
}
static void
gst_lv2_filter_get_property (GObject * object, guint prop_id, GValue * value,
GParamSpec * pspec)
{
GstLV2Filter *self = (GstLV2Filter *) (object);
GstLV2FilterClass *klass =
(GstLV2FilterClass *) GST_AUDIO_FILTER_GET_CLASS (object);
GstLV2Filter *self = (GstLV2Filter *) object;
gfloat *controls;
gst_lv2_object_get_property (&self->lv2, object, prop_id, value, pspec);
}
/* remember, properties have an offset of 1 */
prop_id--;
static void
gst_lv2_filter_finalize (GObject * object)
{
GstLV2Filter *self = (GstLV2Filter *) object;
if (prop_id < klass->control_in_ports->len) {
controls = self->ports.control.in;
} else if (prop_id < klass->control_in_ports->len +
klass->control_out_ports->len) {
controls = self->ports.control.out;
prop_id -= klass->control_in_ports->len;
} else {
g_return_if_reached ();
}
gst_lv2_finalize (&self->lv2);
/* 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 ();
}
G_OBJECT_CLASS (parent_class)->finalize (object);
}
#if 0
@ -229,7 +150,7 @@ gst_lv2_filter_role_to_position (LilvNode * role)
}
static GstAudioChannelPosition *
gst_lv2_filter_build_positions (GstLV2FilterGroup * group)
gst_lv2_filter_build_positions (GstLV2Group * group)
{
GstAudioChannelPosition *positions = NULL;
@ -239,7 +160,7 @@ gst_lv2_filter_build_positions (GstLV2FilterGroup * group)
positions = g_new (GstAudioChannelPosition, group->ports->len);
for (i = 0; i < group->ports->len; ++i)
positions[i] = g_array_index (group->ports, GstLV2FilterPort, i).position;
positions[i] = g_array_index (group->ports, GstLV2Port, i).position;
}
return positions;
}
@ -255,9 +176,9 @@ gst_lv2_filter_type_class_add_pad_templates (GstLV2FilterClass * klass)
gint in_channels = 1, out_channels = 1;
in_channels = klass->in_group.ports->len;
in_channels = klass->lv2.in_group.ports->len;
out_channels = klass->out_group.ports->len;
out_channels = klass->lv2.out_group.ports->len;
/* FIXME Implement deintereleaved audio support */
sinkcaps = gst_caps_new_simple ("audio/x-raw",
@ -289,44 +210,22 @@ gst_lv2_filter_type_class_add_pad_templates (GstLV2FilterClass * klass)
static gboolean
gst_lv2_filter_setup (GstAudioFilter * gsp, const GstAudioInfo * info)
{
GstLV2Filter *self;
GstLV2FilterClass *oclass;
GstAudioFilterClass *audiofilter_class;
gint i;
GstLV2Filter *self = (GstLV2Filter *) gsp;
audiofilter_class = GST_AUDIO_FILTER_GET_CLASS (gsp);
self = (GstLV2Filter *) gsp;
oclass = (GstLV2FilterClass *) audiofilter_class;
g_return_val_if_fail (self->activated == FALSE, FALSE);
g_return_val_if_fail (self->lv2.activated == FALSE, FALSE);
GST_DEBUG_OBJECT (self, "instantiating the plugin at %d Hz",
GST_AUDIO_INFO_RATE (info));
if (self->instance)
lilv_instance_free (self->instance);
if (!(self->instance =
lilv_plugin_instantiate (oclass->plugin, GST_AUDIO_INFO_RATE (info),
NULL)))
if (!gst_lv2_setup (&self->lv2, GST_AUDIO_INFO_RATE (info)))
goto no_instance;
/* connect the control ports */
for (i = 0; i < oclass->control_in_ports->len; i++)
lilv_instance_connect_port (self->instance,
g_array_index (oclass->control_in_ports, GstLV2FilterPort, i).index,
&(self->ports.control.in[i]));
for (i = 0; i < oclass->control_out_ports->len; i++)
lilv_instance_connect_port (self->instance,
g_array_index (oclass->control_out_ports, GstLV2FilterPort, i).index,
&(self->ports.control.out[i]));
/* FIXME Handle audio channel positionning while negotiating CAPS */
#if 0
gint i;
/* set input group pad audio channel position */
for (i = 0; i < oclass->in_groups->len; ++i) {
group = &g_array_index (oclass->in_groups, GstLV2FilterGroup, i);
for (i = 0; i < oclass->lv2.in_groups->len; ++i) {
group = &g_array_index (oclass->lv2.in_groups, GstLV2Group, i);
if (group->has_roles) {
if ((positions = gst_lv2_filter_build_positions (group))) {
if ((pad = gst_element_get_static_pad (GST_ELEMENT (gsp),
@ -343,8 +242,8 @@ gst_lv2_filter_setup (GstAudioFilter * gsp, const GstAudioInfo * info)
}
}
/* set output group pad audio channel position */
for (i = 0; i < oclass->out_groups->len; ++i) {
group = &g_array_index (oclass->out_groups, GstLV2FilterGroup, i);
for (i = 0; i < oclass->lv2.out_groups->len; ++i) {
group = &g_array_index (oclass->lv2.out_groups, GstLV2Group, i);
if (group->has_roles) {
if ((positions = gst_lv2_filter_build_positions (group))) {
if ((pad = gst_element_get_static_pad (GST_ELEMENT (gsp),
@ -362,9 +261,6 @@ gst_lv2_filter_setup (GstAudioFilter * gsp, const GstAudioInfo * info)
}
#endif
lilv_instance_activate (self->instance);
self->activated = TRUE;
return TRUE;
no_instance:
@ -379,28 +275,7 @@ gst_lv2_filter_stop (GstBaseTransform * transform)
{
GstLV2Filter *lv2 = (GstLV2Filter *) transform;
if (lv2->activated == FALSE) {
GST_ERROR_OBJECT (transform, "Deactivating but LV2 plugin not activated");
return TRUE;
}
if (lv2->instance == NULL) {
GST_ERROR_OBJECT (transform, "Deactivating but no LV2 plugin set");
return TRUE;
}
GST_DEBUG_OBJECT (lv2, "deactivating");
lilv_instance_deactivate (lv2->instance);
lv2->activated = FALSE;
lilv_instance_free (lv2->instance);
lv2->instance = NULL;
return TRUE;
return gst_lv2_cleanup (&lv2->lv2, (GstObject *) lv2);
}
static inline void
@ -430,51 +305,50 @@ static GstFlowReturn
gst_lv2_filter_transform_data (GstLV2Filter * self,
GstMapInfo * in_map, GstMapInfo * out_map)
{
GstAudioFilterClass *audiofilter_class;
GstLV2FilterClass *lv2_class;
GstLV2FilterGroup *lv2_group;
GstLV2FilterPort *lv2_port;
GstLV2Group *lv2_group;
GstLV2Port *lv2_port;
guint j, nframes, samples, out_samples;
gfloat *in = NULL, *out = NULL;
nframes = in_map->size / sizeof (float);
audiofilter_class = GST_AUDIO_FILTER_GET_CLASS (self);
lv2_class = (GstLV2FilterClass *) audiofilter_class;
samples = nframes / lv2_class->in_group.ports->len;
lv2_class = (GstLV2FilterClass *) GST_AUDIO_FILTER_GET_CLASS (self);
/* multi channel inputs */
lv2_group = &lv2_class->in_group;
lv2_group = &lv2_class->lv2.in_group;
samples = nframes / lv2_group->ports->len;
in = g_new0 (gfloat, nframes);
GST_INFO ("in : samples=%u, nframes=%u, ports=%d", samples, nframes,
lv2_group->ports->len);
if (lv2_group->ports->len > 1)
gst_lv2_filter_deinterleave_data (lv2_group->ports->len, in,
samples, (gfloat *) in_map->data);
gst_lv2_filter_deinterleave_data (lv2_group->ports->len, in,
samples, (gfloat *) in_map->data);
for (j = 0; j < lv2_group->ports->len; ++j) {
lv2_port = &g_array_index (lv2_group->ports, GstLV2FilterPort, j);
lilv_instance_connect_port (self->instance, lv2_port->index,
lv2_port = &g_array_index (lv2_group->ports, GstLV2Port, j);
lilv_instance_connect_port (self->lv2.instance, lv2_port->index,
in + (j * samples));
}
lv2_group = &lv2_class->out_group;
/* multi channel outputs */
lv2_group = &lv2_class->lv2.out_group;
out_samples = nframes / lv2_group->ports->len;
out = g_new0 (gfloat, samples * lv2_group->ports->len);
GST_INFO ("out: samples=%u, nframes=%u, ports=%d", out_samples, nframes,
lv2_group->ports->len);
for (j = 0; j < lv2_group->ports->len; ++j) {
lv2_port = &g_array_index (lv2_group->ports, GstLV2FilterPort, j);
lilv_instance_connect_port (self->instance, lv2_port->index,
lv2_port = &g_array_index (lv2_group->ports, GstLV2Port, j);
lilv_instance_connect_port (self->lv2.instance, lv2_port->index,
out + (j * out_samples));
}
lilv_instance_run (self->instance, samples);
lilv_instance_run (self->lv2.instance, samples);
if (lv2_group->ports->len > 1)
gst_lv2_filter_interleave_data (lv2_group->ports->len,
(gfloat *) out_map->data, out_samples, out);
gst_lv2_filter_interleave_data (lv2_group->ports->len,
(gfloat *) out_map->data, out_samples, out);
g_free (out);
g_free (in);
@ -520,276 +394,51 @@ gst_lv2_filter_base_init (gpointer g_class)
{
GstLV2FilterClass *klass = (GstLV2FilterClass *) g_class;
GstElementClass *element_class = GST_ELEMENT_CLASS (g_class);
LilvPlugin *lv2plugin;
LilvNode *val;
/* FIXME Handle channels positionning
* GstAudioChannelPosition position = GST_AUDIO_CHANNEL_POSITION_INVALID; */
guint j, in_pad_index = 0, out_pad_index = 0;
gchar *longname, *author;
lv2plugin = (LilvPlugin *) g_type_get_qdata (G_OBJECT_CLASS_TYPE (klass),
descriptor_quark);
gst_lv2_class_init (&klass->lv2, G_TYPE_FROM_CLASS (klass));
g_assert (lv2plugin);
gst_lv2_element_class_set_metadata (&klass->lv2, element_class,
"Filter/Effect/Audio/LV2");
GST_INFO ("base_init %p, plugin %s", g_class,
lilv_node_get_turtle_token (lilv_plugin_get_uri (lv2plugin)));
klass->in_group.ports = g_array_new (FALSE, TRUE, sizeof (GstLV2FilterPort));
klass->out_group.ports = g_array_new (FALSE, TRUE, sizeof (GstLV2FilterPort));
klass->control_in_ports =
g_array_new (FALSE, TRUE, sizeof (GstLV2FilterPort));
klass->control_out_ports =
g_array_new (FALSE, TRUE, sizeof (GstLV2FilterPort));
/* find ports and groups */
for (j = 0; j < lilv_plugin_get_num_ports (lv2plugin); j++) {
const LilvPort *port = lilv_plugin_get_port_by_index (lv2plugin, j);
const gboolean is_input = lilv_port_is_a (lv2plugin, port, input_class);
struct _GstLV2FilterPort desc = { j, 0, };
LilvNodes *lv2group = lilv_port_get (lv2plugin, port, group_pred);
if (lv2group) {
/* port is part of a group */
const gchar *group_uri = lilv_node_as_uri (lv2group);
GstLV2FilterGroup *group =
is_input ? &klass->in_group : &klass->out_group;
if (group->uri == NULL) {
group->uri = g_strdup (group_uri);
group->pad = is_input ? in_pad_index++ : out_pad_index++;
group->ports = g_array_new (FALSE, TRUE, sizeof (GstLV2FilterPort));
}
/* FIXME Handle channels positionning
position = GST_AUDIO_CHANNEL_POSITION_FRONT_LEFT;
sub_values = lilv_port_get_value (lv2plugin, port, has_role_pred);
if (lilv_nodes_size (sub_values) > 0) {
LilvNode *role = lilv_nodes_get_at (sub_values, 0);
position = gst_lv2_filter_role_to_position (role);
}
lilv_nodes_free (sub_values);
if (position != GST_AUDIO_CHANNEL_POSITION_INVALID) {
desc.position = position;
} */
g_array_append_val (group->ports, desc);
} else {
/* 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 (lilv_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->in_group.ports, desc);
else
g_array_append_val (klass->out_group.ports, desc);
} else if (lilv_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;
}
}
}
gst_lv2_filter_type_class_add_pad_templates (klass);
val = lilv_plugin_get_name (lv2plugin);
if (val) {
longname = g_strdup (lilv_node_as_string (val));
lilv_node_free (val);
} else {
longname = g_strdup ("no description available");
}
val = lilv_plugin_get_author_name (lv2plugin);
if (val) {
author = g_strdup (lilv_node_as_string (val));
lilv_node_free (val);
} else {
author = g_strdup ("no author available");
}
gst_element_class_set_metadata (element_class, longname,
"Filter/Effect/Audio/LV2", longname, author);
g_free (longname);
g_free (author);
klass->plugin = lv2plugin;
}
static gchar *
gst_lv2_filter_class_get_param_name (GstLV2FilterClass * klass,
const LilvPort * port)
static void
gst_lv2_filter_base_finalize (GstLV2FilterClass * lv2_class)
{
LilvPlugin *lv2plugin = klass->plugin;
gchar *ret;
ret = g_strdup (lilv_node_as_string (lilv_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,
lilv_node_as_string (lilv_port_get_symbol (lv2plugin, port)));
return ret;
}
static gchar *
gst_lv2_filter_class_get_param_nick (GstLV2FilterClass * klass,
const LilvPort * port)
{
LilvPlugin *lv2plugin = klass->plugin;
return g_strdup (lilv_node_as_string (lilv_port_get_name (lv2plugin, port)));
}
static GParamSpec *
gst_lv2_filter_class_get_param_spec (GstLV2FilterClass * klass, gint portnum)
{
LilvPlugin *lv2plugin = klass->plugin;
const LilvPort *port = lilv_plugin_get_port_by_index (lv2plugin, portnum);
LilvNode *lv2def, *lv2min, *lv2max;
GParamSpec *ret;
gchar *name, *nick;
gint perms;
gfloat lower = 0.0f, upper = 1.0f, def = 0.0f;
nick = gst_lv2_filter_class_get_param_nick (klass, port);
name = gst_lv2_filter_class_get_param_name (klass, port);
GST_DEBUG ("%s trying port %s : %s",
lilv_node_as_string (lilv_plugin_get_uri (lv2plugin)), name, nick);
perms = G_PARAM_READABLE;
if (lilv_port_is_a (lv2plugin, port, input_class))
perms |= G_PARAM_WRITABLE | G_PARAM_CONSTRUCT;
if (lilv_port_is_a (lv2plugin, port, control_class))
perms |= GST_PARAM_CONTROLLABLE;
if (lilv_port_has_property (lv2plugin, port, toggled_prop)) {
ret = g_param_spec_boolean (name, nick, nick, FALSE, perms);
goto done;
}
lilv_port_get_range (lv2plugin, port, &lv2def, &lv2min, &lv2max);
if (lv2def)
def = lilv_node_as_float (lv2def);
if (lv2min)
lower = lilv_node_as_float (lv2min);
if (lv2max)
upper = lilv_node_as_float (lv2max);
lilv_node_free (lv2def);
lilv_node_free (lv2min);
lilv_node_free (lv2max);
if (def < lower) {
GST_WARNING ("%s has lower bound %f > default %f",
lilv_node_as_string (lilv_plugin_get_uri (lv2plugin)), lower, def);
lower = def;
}
if (def > upper) {
GST_WARNING ("%s has upper bound %f < default %f",
lilv_node_as_string (lilv_plugin_get_uri (lv2plugin)), upper, def);
upper = def;
}
if (lilv_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;
gst_lv2_class_finalize (&lv2_class->lv2);
}
static void
gst_lv2_filter_class_init (GstLV2FilterClass * klass, LilvPlugin * lv2plugin)
{
GObjectClass *gobject_class;
GstBaseTransformClass *transform_class;
GstAudioFilterClass *audiofilter_class;
GParamSpec *p;
gint i, ix;
GObjectClass *gobject_class = (GObjectClass *) klass;
GstBaseTransformClass *transform_class = GST_BASE_TRANSFORM_CLASS (klass);
GstAudioFilterClass *audiofilter_class = GST_AUDIO_FILTER_CLASS (klass);
GST_DEBUG ("class_init %p", klass);
gobject_class = (GObjectClass *) klass;
gobject_class->set_property = gst_lv2_filter_set_property;
gobject_class->get_property = gst_lv2_filter_get_property;
gobject_class->finalize = gst_lv2_filter_finalize;
audiofilter_class = GST_AUDIO_FILTER_CLASS (klass);
audiofilter_class->setup = gst_lv2_filter_setup;
transform_class = GST_BASE_TRANSFORM_CLASS (klass);
transform_class->stop = gst_lv2_filter_stop;
transform_class->transform = gst_lv2_filter_transform;
transform_class->transform_ip = gst_lv2_filter_transform_ip;
klass->plugin = lv2plugin;
klass->lv2.plugin = lv2plugin;
/* properties have an offset of 1 */
ix = 1;
/* register properties */
for (i = 0; i < klass->control_in_ports->len; i++, ix++) {
p = gst_lv2_filter_class_get_param_spec (klass,
g_array_index (klass->control_in_ports, GstLV2FilterPort, i).index);
g_object_class_install_property (gobject_class, ix, p);
}
for (i = 0; i < klass->control_out_ports->len; i++, ix++) {
p = gst_lv2_filter_class_get_param_spec (klass,
g_array_index (klass->control_out_ports, GstLV2FilterPort, i).index);
g_object_class_install_property (gobject_class, ix, p);
}
gst_lv2_class_install_properties (&klass->lv2, gobject_class, 1);
}
static void
gst_lv2_filter_init (GstLV2Filter * self, GstLV2FilterClass * klass)
{
self->plugin = klass->plugin;
self->instance = NULL;
self->activated = FALSE;
gst_lv2_init (&self->lv2, &klass->lv2);
self->ports.control.in = g_new0 (gfloat, klass->control_in_ports->len);
self->ports.control.out = g_new0 (gfloat, klass->control_out_ports->len);
if (!lilv_plugin_has_feature (self->plugin, in_place_broken_pred))
if (!lilv_plugin_has_feature (klass->lv2.plugin, in_place_broken_pred))
gst_base_transform_set_in_place (GST_BASE_TRANSFORM (self), TRUE);
}
@ -801,7 +450,7 @@ gst_lv2_filter_register_element (GstPlugin * plugin, const gchar * type_name,
GTypeInfo typeinfo = {
sizeof (GstLV2FilterClass),
(GBaseInitFunc) gst_lv2_filter_base_init,
NULL,
(GBaseFinalizeFunc) gst_lv2_filter_base_finalize,
(GClassInitFunc) gst_lv2_filter_class_init,
NULL,
lv2plugin,
@ -819,7 +468,7 @@ gst_lv2_filter_register_element (GstPlugin * plugin, const gchar * type_name,
/* FIXME: not needed anymore when we can add pad templates, etc in class_init
* as class_data contains the LADSPA_Descriptor too */
* as class_data contains the Descriptor too */
g_type_set_qdata (type, descriptor_quark, lv2plugin);
return gst_element_register (plugin, type_name, GST_RANK_NONE, type);

427
ext/lv2/gstlv2utils.c Normal file
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@ -0,0 +1,427 @@
/* GStreamer
* Copyright (C) 2016 Thibault Saunier <thibault.saunier@collabora.com>
* 2016 Stefan Sauer <ensonic@users.sf.net>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "gstlv2.h"
#include "gstlv2utils.h"
GST_DEBUG_CATEGORY_EXTERN (lv2_debug);
#define GST_CAT_DEFAULT lv2_debug
void
gst_lv2_init (GstLV2 * lv2, GstLV2Class * lv2_class)
{
lv2->klass = lv2_class;
lv2->instance = NULL;
lv2->activated = FALSE;
lv2->ports.control.in = g_new0 (gfloat, lv2_class->control_in_ports->len);
lv2->ports.control.out = g_new0 (gfloat, lv2_class->control_out_ports->len);
}
void
gst_lv2_finalize (GstLV2 * lv2)
{
g_free (lv2->ports.control.in);
g_free (lv2->ports.control.out);
}
gboolean
gst_lv2_setup (GstLV2 * lv2, unsigned long rate)
{
GstLV2Class *lv2_class = lv2->klass;
gint i;
if (lv2->instance)
lilv_instance_free (lv2->instance);
if (!(lv2->instance =
lilv_plugin_instantiate (lv2_class->plugin, rate, NULL)))
return FALSE;
/* connect the control ports */
for (i = 0; i < lv2_class->control_in_ports->len; i++)
lilv_instance_connect_port (lv2->instance,
g_array_index (lv2_class->control_in_ports, GstLV2Port, i).index,
&(lv2->ports.control.in[i]));
for (i = 0; i < lv2_class->control_out_ports->len; i++)
lilv_instance_connect_port (lv2->instance,
g_array_index (lv2_class->control_out_ports, GstLV2Port, i).index,
&(lv2->ports.control.out[i]));
lilv_instance_activate (lv2->instance);
lv2->activated = TRUE;
return TRUE;
}
gboolean
gst_lv2_cleanup (GstLV2 * lv2, GstObject * obj)
{
if (lv2->activated == FALSE) {
GST_ERROR_OBJECT (obj, "Deactivating but LV2 plugin not activated");
return TRUE;
}
if (lv2->instance == NULL) {
GST_ERROR_OBJECT (obj, "Deactivating but no LV2 plugin set");
return TRUE;
}
GST_DEBUG_OBJECT (obj, "deactivating");
lilv_instance_deactivate (lv2->instance);
lv2->activated = FALSE;
lilv_instance_free (lv2->instance);
lv2->instance = NULL;
return TRUE;
}
void
gst_lv2_object_set_property (GstLV2 * lv2, GObject * object,
guint prop_id, const GValue * value, GParamSpec * pspec)
{
/* remember, properties have an offset */
prop_id -= lv2->klass->properties;
/* only input ports */
g_return_if_fail (prop_id < lv2->klass->control_in_ports->len);
/* now see what type it is */
switch (pspec->value_type) {
case G_TYPE_BOOLEAN:
lv2->ports.control.in[prop_id] =
g_value_get_boolean (value) ? 0.0f : 1.0f;
break;
case G_TYPE_INT:
lv2->ports.control.in[prop_id] = g_value_get_int (value);
break;
case G_TYPE_FLOAT:
lv2->ports.control.in[prop_id] = g_value_get_float (value);
break;
default:
GST_WARNING_OBJECT (object, "unhandled type: %s",
g_type_name (pspec->value_type));
g_assert_not_reached ();
}
}
void
gst_lv2_object_get_property (GstLV2 * lv2, GObject * object,
guint prop_id, GValue * value, GParamSpec * pspec)
{
gfloat *controls;
/* remember, properties have an offset */
prop_id -= lv2->klass->properties;
if (prop_id < lv2->klass->control_in_ports->len) {
controls = lv2->ports.control.in;
} else if (prop_id < lv2->klass->control_in_ports->len +
lv2->klass->control_out_ports->len) {
controls = lv2->ports.control.out;
prop_id -= lv2->klass->control_in_ports->len;
} 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:
GST_WARNING_OBJECT (object, "unhandled type: %s",
g_type_name (pspec->value_type));
g_return_if_reached ();
}
}
static gchar *
gst_lv2_class_get_param_name (GstLV2Class * klass, GObjectClass * object_class,
const LilvPort * port)
{
LilvPlugin *lv2plugin = klass->plugin;
gchar *ret;
ret = g_strdup (lilv_node_as_string (lilv_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 (object_class, ret)) {
gint n = 1;
gchar *nret = g_strdup_printf ("%s-%d", ret, n++);
while (g_object_class_find_property (object_class, 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,
lilv_node_as_string (lilv_port_get_symbol (lv2plugin, port)));
return ret;
}
static gchar *
gst_lv2_class_get_param_nick (GstLV2Class * klass, const LilvPort * port)
{
LilvPlugin *lv2plugin = klass->plugin;
return g_strdup (lilv_node_as_string (lilv_port_get_name (lv2plugin, port)));
}
static GParamSpec *
gst_lv2_class_get_param_spec (GstLV2Class * klass, GObjectClass * object_class,
gint portnum)
{
LilvPlugin *lv2plugin = klass->plugin;
const LilvPort *port = lilv_plugin_get_port_by_index (lv2plugin, portnum);
LilvNode *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, object_class, port);
GST_DEBUG ("%s trying port %s : %s",
lilv_node_as_string (lilv_plugin_get_uri (lv2plugin)), name, nick);
perms = G_PARAM_READABLE;
if (lilv_port_is_a (lv2plugin, port, input_class))
perms |= G_PARAM_WRITABLE | G_PARAM_CONSTRUCT;
if (lilv_port_is_a (lv2plugin, port, control_class))
perms |= GST_PARAM_CONTROLLABLE;
if (lilv_port_has_property (lv2plugin, port, toggled_prop)) {
ret = g_param_spec_boolean (name, nick, nick, FALSE, perms);
goto done;
}
lilv_port_get_range (lv2plugin, port, &lv2def, &lv2min, &lv2max);
if (lv2def)
def = lilv_node_as_float (lv2def);
if (lv2min)
lower = lilv_node_as_float (lv2min);
if (lv2max)
upper = lilv_node_as_float (lv2max);
lilv_node_free (lv2def);
lilv_node_free (lv2min);
lilv_node_free (lv2max);
if (def < lower) {
GST_WARNING ("%s has lower bound %f > default %f",
lilv_node_as_string (lilv_plugin_get_uri (lv2plugin)), lower, def);
lower = def;
}
if (def > upper) {
GST_WARNING ("%s has upper bound %f < default %f",
lilv_node_as_string (lilv_plugin_get_uri (lv2plugin)), upper, def);
upper = def;
}
if (lilv_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;
}
void
gst_lv2_class_install_properties (GstLV2Class * lv2_class,
GObjectClass * object_class, guint offset)
{
GParamSpec *p;
guint i;
lv2_class->properties = offset;
for (i = 0; i < lv2_class->control_in_ports->len; i++, offset++) {
p = gst_lv2_class_get_param_spec (lv2_class, object_class,
g_array_index (lv2_class->control_in_ports, GstLV2Port, i).index);
g_object_class_install_property (object_class, offset, p);
}
for (i = 0; i < lv2_class->control_out_ports->len; i++, offset++) {
p = gst_lv2_class_get_param_spec (lv2_class, object_class,
g_array_index (lv2_class->control_out_ports, GstLV2Port, i).index);
g_object_class_install_property (object_class, offset, p);
}
}
void
gst_lv2_element_class_set_metadata (GstLV2Class * lv2_class,
GstElementClass * elem_class, const gchar * lv2_class_tags)
{
LilvPlugin *lv2plugin = lv2_class->plugin;
LilvNode *val;
gchar *longname, *author;
val = lilv_plugin_get_name (lv2plugin);
if (val) {
longname = g_strdup (lilv_node_as_string (val));
lilv_node_free (val);
} else {
longname = g_strdup ("no description available");
}
val = lilv_plugin_get_author_name (lv2plugin);
if (val) {
author = g_strdup (lilv_node_as_string (val));
lilv_node_free (val);
} else {
author = g_strdup ("no author available");
}
gst_element_class_set_metadata (elem_class, longname, lv2_class_tags,
longname, author);
g_free (longname);
g_free (author);
}
void
gst_lv2_class_init (GstLV2Class * lv2_class, GType type)
{
LilvPlugin *lv2plugin;
/* FIXME Handle channels positionning
* GstAudioChannelPosition position = GST_AUDIO_CHANNEL_POSITION_INVALID; */
guint j, in_pad_index = 0, out_pad_index = 0;
GST_DEBUG ("LV2 initializing class");
lv2plugin = (LilvPlugin *) g_type_get_qdata (type, descriptor_quark);
g_assert (lv2plugin);
lv2_class->plugin = lv2plugin;
lv2_class->in_group.ports = g_array_new (FALSE, TRUE, sizeof (GstLV2Port));
lv2_class->out_group.ports = g_array_new (FALSE, TRUE, sizeof (GstLV2Port));
lv2_class->control_in_ports = g_array_new (FALSE, TRUE, sizeof (GstLV2Port));
lv2_class->control_out_ports = g_array_new (FALSE, TRUE, sizeof (GstLV2Port));
/* find ports and groups */
for (j = 0; j < lilv_plugin_get_num_ports (lv2plugin); j++) {
const LilvPort *port = lilv_plugin_get_port_by_index (lv2plugin, j);
const gboolean is_input = lilv_port_is_a (lv2plugin, port, input_class);
struct _GstLV2Port desc = { j, 0, };
LilvNodes *lv2group = lilv_port_get (lv2plugin, port, group_pred);
if (lv2group) {
/* port is part of a group */
const gchar *group_uri = lilv_node_as_uri (lv2group);
GstLV2Group *group = is_input
? &lv2_class->in_group : &lv2_class->out_group;
if (group->uri == NULL) {
group->uri = g_strdup (group_uri);
group->pad = is_input ? in_pad_index++ : out_pad_index++;
group->ports = g_array_new (FALSE, TRUE, sizeof (GstLV2Port));
}
/* FIXME Handle channels positionning
position = GST_AUDIO_CHANNEL_POSITION_FRONT_LEFT;
sub_values = lilv_port_get_value (lv2plugin, port, has_role_pred);
if (lilv_nodes_size (sub_values) > 0) {
LilvNode *role = lilv_nodes_get_at (sub_values, 0);
position = gst_lv2_filter_role_to_position (role);
}
lilv_nodes_free (sub_values);
if (position != GST_AUDIO_CHANNEL_POSITION_INVALID) {
desc.position = position;
} */
g_array_append_val (group->ports, desc);
} else {
/* 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 (lilv_port_is_a (lv2plugin, port, audio_class)) {
desc.pad = is_input ? in_pad_index++ : out_pad_index++;
if (is_input)
g_array_append_val (lv2_class->in_group.ports, desc);
else
g_array_append_val (lv2_class->out_group.ports, desc);
} else if (lilv_port_is_a (lv2plugin, port, control_class)) {
if (is_input)
g_array_append_val (lv2_class->control_in_ports, desc);
else
g_array_append_val (lv2_class->control_out_ports, desc);
} else {
/* unknown port type */
GST_INFO ("unhandled port %d: %s", j,
lilv_node_as_string (lilv_port_get_symbol (lv2plugin, port)));
continue;
}
}
}
}
void
gst_lv2_class_finalize (GstLV2Class * lv2_class)
{
GST_DEBUG ("LV2 finalizing class");
g_array_free (lv2_class->in_group.ports, TRUE);
lv2_class->in_group.ports = NULL;
g_array_free (lv2_class->out_group.ports, TRUE);
lv2_class->out_group.ports = NULL;
g_array_free (lv2_class->control_in_ports, TRUE);
lv2_class->control_in_ports = NULL;
g_array_free (lv2_class->control_out_ports, TRUE);
lv2_class->control_out_ports = NULL;
}

111
ext/lv2/gstlv2utils.h Normal file
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@ -0,0 +1,111 @@
/* GStreamer
* Copyright (C) 2016 Thibault Saunier <thibault.saunier@collabora.com>
* 2016 Stefan Sauer <ensonic@users.sf.net>
*
* gstlv2utils.h: Header for LV2 plugin utils
*
* 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.
*/
#ifndef __GST_LV2_UTILS_H__
#define __GST_LV2_UTILS_H__
#include <gst/gst.h>
#include <gst/audio/audio.h>
#include <gst/audio/audio-channels.h>
#include <lilv/lilv.h>
G_BEGIN_DECLS
typedef struct _GstLV2Group GstLV2Group;
typedef struct _GstLV2Port GstLV2Port;
typedef struct _GstLV2 GstLV2;
typedef struct _GstLV2Class GstLV2Class;
struct _GstLV2Group
{
gchar *uri; /**< RDF resource (URI or blank node) */
guint pad; /**< Gst pad index */
gchar *symbol; /**< Gst pad name / LV2 group symbol */
GArray *ports; /**< Array of GstLV2Port */
gboolean has_roles; /**< TRUE iff all ports have a known role */
};
struct _GstLV2Port
{
gint index; /**< LV2 port index (on LV2 plugin) */
gint pad; /**< Gst pad index (iff not part of a group) */
LilvNode *role; /**< Channel position / port role */
GstAudioChannelPosition position; /**< Channel position */
};
struct _GstLV2
{
GstLV2Class *klass;
LilvInstance *instance;
gboolean activated;
unsigned long rate;
struct
{
struct
{
gfloat *in;
gfloat *out;
} control;
} ports;
};
struct _GstLV2Class
{
guint properties;
LilvPlugin *plugin;
GstLV2Group in_group; /**< Array of GstLV2Group */
GstLV2Group out_group; /**< Array of GstLV2Group */
GArray *control_in_ports; /**< Array of GstLV2Port */
GArray *control_out_ports; /**< Array of GstLV2Port */
};
void gst_lv2_init (GstLV2 * lv2, GstLV2Class * lv2_class);
void gst_lv2_finalize (GstLV2 * lv2);
gboolean gst_lv2_setup (GstLV2 * lv2, unsigned long rate);
gboolean gst_lv2_cleanup (GstLV2 * lv2, GstObject *obj);
void gst_lv2_object_set_property (GstLV2 * lv2, GObject * object,
guint prop_id, const GValue * value, GParamSpec * pspec);
void gst_lv2_object_get_property (GstLV2 * lv2, GObject * object,
guint prop_id, GValue * value, GParamSpec * pspec);
void gst_lv2_class_install_properties (GstLV2Class * lv2_class,
GObjectClass * object_class, guint offset);
void gst_lv2_element_class_set_metadata (GstLV2Class * lv2_class,
GstElementClass * elem_class, const gchar * lv2_class_tags);
void gst_lv2_class_init (GstLV2Class * lv2_class, GType type);
void gst_lv2_class_finalize (GstLV2Class * lv2_class);
G_END_DECLS
#endif /* __GST_LV2_UTILS_H__ */