gstreamer/ext/ladspa/gstladspa.c
Juan Manuel Borges Caño 70e208d08e ladspa: improved port to gstreamer 1.0
Fixes: #698927
2013-05-03 12:36:44 +02:00

355 lines
12 KiB
C

/* GStreamer LADSPA plugin
* Copyright (C) 1999 Erik Walthinsen <omega@cse.ogi.edu>
* 2001 Steve Baker <stevebaker_org@yahoo.co.uk>
* 2003 Andy Wingo <wingo at pobox.com>
* Copyright (C) 2013 Juan Manuel Borges Caño <juanmabcmail@gmail.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-ladspa
* @short_description: bridge for LADSPA (Linux Audio Developer's Simple Plugin API)
* @see_also: #GstAudioConvert #GstAudioResample, #GstAudioTestSrc, #GstAutoAudioSink
*
* The LADSPA (Linux Audio Developer's Simple Plugin API) element is a bridge
* for plugins using the <ulink url="http://www.ladspa.org/">LADSPA</ulink> API.
* It scans all installed LADSPA plugins and registers them as gstreamer
* elements. If available it can also parse LRDF files and use the metadata for
* element classification. The functionality you get depends on the LADSPA plugins
* you have installed.
*
* First off all you can apply not live LADSPA filters without this plugin:
*
* <refsect2>
* <title>Example LADSPA line without this plugins</title>
* |[
* (padsp) listplugins
* (padsp) analyseplugin cmt.so amp_mono
* gst-launch -e filesrc location="$myfile" ! decodebin ! audioconvert ! audioresample ! "audio/x-raw,format=S16LE,rate=48000,channels=1" ! wavenc ! filesink location="testin.wav"
* (padsp) applyplugin testin.wav testout.wav cmt.so amp_mono 2
* gst-launch playbin uri=file://"$PWD"/testout.wav
* ]| Decode any audio file into wav with the format expected for the specific ladspa plugin to be applied, apply the ladspa filter and play it.
* </refsect2>
*
* Now with this plugin:
*
* <refsect2>
* <title>Example LADSPA line with this plugins</title>
* |[
* gst-launch autoaudiosrc ! ladspa-cmt-so-amp-mono gain=2 ! ladspa-caps-so-plate ! ladspa-tap-echo-so-tap-stereo-echo l-delay=500 r-haas-delay=500 ! tee name=myT myT. ! queue ! autoaudiosink myT. ! queue ! audioconvert ! goom ! videoconvert ! xvimagesink pixel-aspect-ratio=3/4
* ]| Get audio input, filter it through CAPS Plate and TAP Stereo Echo, play it and show a visualization (recommended hearphones).
* </refsect2>
*
* In case you wonder the plugin naming scheme, quoting ladspa.h:
* "Plugin types should be identified by file and label rather than by
* index or plugin name, which may be changed in new plugin versions."
* This is really the best way then, and so it is less prone to conflicts.
*
* Also it is worth noting that LADSPA provides a control in and out interface,
* on top of the audio in and out one, so some parameters are readable too.
*
* You can see the listing of plugins available with:
* <refsect2>
* <title>Inspecting the plugins list</title>
* |[
* gst-inspect ladspa
* ]| List available LADSPA plugins on gstreamer.
* </refsect2>
*
* You can see the parameters of any plugin with:
* <refsect2>
* <title>Inspecting the plugins</title>
* |[
* gst-inspect ladspa-retro-flange-1208-so-retroFlange
* ]| List details of the plugin, parameters, range and defaults included.
* </refsect2>
*
* The elements categorize in:
* <itemizedlist>
* <listitem><para>Filter/Effect/Audio/LADSPA:</para>
* <refsect2>
* <title>Example Filter/Effect/Audio/LADSPA line with this plugins</title>
* |[
* gst-launch filesrc location="$myfile" ! decodebin ! audioconvert ! audioresample ! ladspa-calf-so-reverb decay-time=15 high-frq-damp=20000 room-size=5 diffusion=1 wet-amount=2 dry-amount=2 pre-delay=50 bass-cut=20000 treble-cut=20000 ! ladspa-tap-echo-so-tap-stereo-echo l-delay=500 r-haas-delay=500 ! autoaudiosink
* ]| Decode any audio file, filter it through Calf Reverb LADSPA then TAP Stereo Echo, and play it.
* </refsect2>
* <refsect2>
* </listitem>
* <listitem><para>Source/Audio/LADSPA:</para>
* <refsect2>
* <title>Example Source/Audio/LADSPA line with this plugins</title>
* |[
* gst-launch -e ladspasrc-sine-so-sine-fcac frequency=220 amplitude=100 ! audioconvert ! "audio/x-raw,rate=22050" ! autoaudiosink
* ]| Generate a sine wave with Sine Oscillator (Freq:control, Amp:control), convert it to 22050 Hz and play it.
* </refsect2>
* <refsect2>
* <title>Example Source/Audio/LADSPA line with this plugins</title>
* |[
* gst-launch -e ladspasrc-caps-so-click bpm=240 volume=1 ! autoaudiosink
* ]| Generate clicks with CAPS Click - Metronome at 240 beats per minute and play it.
* </refsect2>
* <refsect2>
* <title>Example Source/Audio/LADSPA line with this plugins</title>
* |[
* gst-launch -e ladspasrc-random-1661-so-random-fcsc-oa ! ladspa-cmt-so-amp-mono gain=1.5 ! ladspa-caps-so-plate ! tee name=myT myT. ! queue ! autoaudiosink myT. ! queue ! audioconvert ! wavescope ! videoconvert ! autovideosink
* ]| Generate random wave, filter it trhough Mono Amplifier and Versatile Plate Reverb, and play, while showing, it.
* </refsect2>
* </listitem>
* <listitem><para>Sink/Audio/LADSPA:</para>
* <refsect2>
* <title>Example Sink/Audio/LADSPA line with this plugins</title>
* |[
* gst-launch -e autoaudiosrc ! ladspa-cmt-so-amp-mono gain=2 ! ladspa-caps-so-plate ! ladspa-tap-echo-so-tap-stereo-echo l-delay=500 r-haas-delay=500 ! tee name=myT myT. ! audioconvert ! audioresample ! queue ! ladspasink-cmt-so-null-ai myT. ! audioconvert ! audioresample ! queue ! goom ! videoconvert ! xvimagesink pixel-aspect-ratio=3/4
* ]| Get audio input, filter it trhough Mono Amplifier, CAPS Plate LADSPA and TAP Stereo Echo, explicitily anulate audio with Null (Audio Input), and play a visualization (recommended hearphones).
* </refsect2>
* </listitem>
* </itemizedlist>
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "gstladspautils.h"
#include "gstladspafilter.h"
#include "gstladspasource.h"
#include "gstladspasink.h"
#include <gst/gst-i18n-plugin.h>
#include <gmodule.h>
#include <string.h>
#include <ladspa.h>
#ifdef HAVE_LRDF
#include <lrdf.h>
#endif
GST_DEBUG_CATEGORY (ladspa_debug);
#define GST_CAT_DEFAULT ladspa_debug
/*
* 1.0 and the 1.1 preliminary headers don't define a version, but
* 1.1 finally does
*/
#ifndef LADSPA_VERSION
#define LADSPA_VERSION "1.0"
#endif
#define GST_LADSPA_DEFAULT_PATH \
"/usr/lib/ladspa" G_SEARCHPATH_SEPARATOR_S \
"/usr/local/lib/ladspa" G_SEARCHPATH_SEPARATOR_S \
LIBDIR "/ladspa"
GQuark descriptor_quark = 0;
static void
ladspa_describe_plugin (GstPlugin * plugin,
const gchar * filename, LADSPA_Descriptor_Function descriptor_function)
{
const LADSPA_Descriptor *desc;
guint i;
/* walk through all the plugins in this plugin library */
for (i = 0; (desc = descriptor_function (i)); i++) {
guint audio_in, audio_out, control_in, control_out;
/* count ports of this plugin */
ladspa_count_ports (desc, &audio_in, &audio_out, &control_in, &control_out);
/* categorize and register it */
if (audio_in == 0)
ladspa_describe_source_plugin (plugin, filename, desc);
else if (audio_out == 0)
ladspa_describe_sink_plugin (plugin, filename, desc);
else
ladspa_describe_filter_plugin (plugin, filename, desc);
}
}
#ifdef HAVE_LRDF
static gboolean
ladspa_rdf_directory_search (const char *dir_name)
{
GDir *dir;
gchar *file_name, *file_uri;
const gchar *entry_name;
gint ok;
GST_INFO ("scanning directory for rdfs \"%s\"", dir_name);
dir = g_dir_open (dir_name, 0, NULL);
if (!dir)
return FALSE;
while ((entry_name = g_dir_read_name (dir))) {
file_name = g_build_filename (dir_name, entry_name, NULL);
file_uri = g_strconcat ("file://", file_name, NULL);
ok = lrdf_read_file (file_uri);
GST_INFO ("read %s : %d", file_uri, ok);
g_free (file_uri);
g_free (file_name);
}
g_dir_close (dir);
return TRUE;
}
#endif
/* search just the one directory */
static gboolean
ladspa_plugin_directory_search (GstPlugin * ladspa_plugin, const char *dir_name)
{
GDir *dir;
gchar *file_name;
const gchar *entry_name;
LADSPA_Descriptor_Function descriptor_function;
GModule *plugin;
gboolean ok = FALSE;
GST_INFO ("scanning directory for plugins \"%s\"", dir_name);
dir = g_dir_open (dir_name, 0, NULL);
if (!dir)
return FALSE;
while ((entry_name = g_dir_read_name (dir))) {
file_name = g_build_filename (dir_name, entry_name, NULL);
plugin =
g_module_open (file_name, G_MODULE_BIND_LAZY | G_MODULE_BIND_LOCAL);
if (plugin) {
/* the file is a shared library */
if (g_module_symbol (plugin, "ladspa_descriptor",
(gpointer *) & descriptor_function)) {
/* we've found a ladspa_descriptor function, now introspect it. */
GST_INFO ("describe %s", file_name);
ladspa_describe_plugin (ladspa_plugin, entry_name, descriptor_function);
ok = TRUE;
} else {
/* it was a library, but not a LADSPA one. Unload it. */
g_module_close (plugin);
}
}
g_free (file_name);
}
g_dir_close (dir);
return ok;
}
/* search the plugin path */
static gboolean
ladspa_plugin_path_search (GstPlugin * plugin)
{
const gchar *search_path;
gchar *ladspa_path;
gchar **paths;
gint i, j, path_entries;
gboolean res = FALSE, skip;
#ifdef HAVE_LRDF
gchar *pos, *prefix, *rdf_path;
#endif
search_path = g_getenv ("LADSPA_PATH");
if (search_path) {
ladspa_path =
g_strdup_printf ("%s" G_SEARCHPATH_SEPARATOR_S GST_LADSPA_DEFAULT_PATH,
search_path);
} else {
ladspa_path = g_strdup (GST_LADSPA_DEFAULT_PATH);
}
paths = g_strsplit (ladspa_path, G_SEARCHPATH_SEPARATOR_S, 0);
path_entries = g_strv_length (paths);
GST_INFO ("%d dirs in search paths \"%s\"", path_entries, ladspa_path);
#ifdef HAVE_LRDF
for (i = 0; i < path_entries; i++) {
skip = FALSE;
for (j = 0; j < i; j++) {
if (!strcmp (paths[i], paths[j])) {
skip = TRUE;
break;
}
}
if (skip)
break;
/*
* transform path: /usr/lib/ladspa -> /usr/share/ladspa/rdf/
* yes, this is ugly, but lrdf has not searchpath
*/
if ((pos = strstr (paths[i], "/lib/ladspa"))) {
prefix = g_strndup (paths[i], (pos - paths[i]));
rdf_path = g_build_filename (prefix, "share", "ladspa", "rdf", NULL);
ladspa_rdf_directory_search (rdf_path);
g_free (rdf_path);
g_free (prefix);
}
}
#endif
for (i = 0; i < path_entries; i++) {
skip = FALSE;
for (j = 0; j < i; j++) {
if (!strcmp (paths[i], paths[j])) {
skip = TRUE;
break;
}
}
if (skip)
break;
res |= ladspa_plugin_directory_search (plugin, paths[i]);
}
g_strfreev (paths);
g_free (ladspa_path);
return res;
}
static gboolean
plugin_init (GstPlugin * plugin)
{
#ifdef ENABLE_NLS
GST_DEBUG ("binding text domain %s to locale dir %s", GETTEXT_PACKAGE,
LOCALEDIR);
bindtextdomain (GETTEXT_PACKAGE, LOCALEDIR);
bind_textdomain_codeset (GETTEXT_PACKAGE, "UTF-8");
#endif
GST_DEBUG_CATEGORY_INIT (ladspa_debug, "ladspa", 0, "LADSPA plugins");
descriptor_quark = g_quark_from_static_string ("ladspa-descriptor");
gst_plugin_add_dependency_simple (plugin,
"LADSPA_PATH",
GST_LADSPA_DEFAULT_PATH, NULL, GST_PLUGIN_DEPENDENCY_FLAG_NONE);
#ifdef HAVE_LRDF
lrdf_init ();
#endif
if (!ladspa_plugin_path_search (plugin))
GST_WARNING ("no LADSPA plugins found, check LADSPA_PATH");
/* we don't want to fail, even if there are no elements registered */
return TRUE;
}
GST_PLUGIN_DEFINE (GST_VERSION_MAJOR,
GST_VERSION_MINOR,
ladspa,
"LADSPA plugin",
plugin_init, VERSION, GST_LICENSE, GST_PACKAGE_NAME, GST_PACKAGE_ORIGIN)