gstreamer/subprojects/gst-plugins-bad/ext/ladspa/gstladspasink.c

374 lines
11 KiB
C

/* GStreamer LADSPA sink category
* Copyright (C) 1999,2000 Erik Walthinsen <omega@cse.ogi.edu>
* 2001 Steve Baker <stevebaker_org@yahoo.co.uk>
* 2003 Andy Wingo <wingo at pobox.com>
* Copyright (C) 2005 Wim Taymans <wim@fluendo.com> (fakesink)
* 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.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "gstladspasink.h"
#include "gstladspa.h"
#include "gstladspautils.h"
#include <gst/base/gstbasetransform.h>
#include <string.h>
GST_DEBUG_CATEGORY_EXTERN (ladspa_debug);
#define GST_CAT_DEFAULT ladspa_debug
#define GST_LADSPA_SINK_CLASS_TAGS "Sink/Audio/LADSPA"
#define GST_LADSPA_SINK_DEFAULT_SYNC TRUE
#define GST_LADSPA_SINK_DEFAULT_CAN_ACTIVATE_PUSH TRUE
#define GST_LADSPA_SINK_DEFAULT_CAN_ACTIVATE_PULL FALSE
#define GST_LADSPA_SINK_DEFAULT_NUM_BUFFERS -1
enum
{
GST_LADSPA_SINK_PROP_0,
GST_LADSPA_SINK_PROP_CAN_ACTIVATE_PUSH,
GST_LADSPA_SINK_PROP_CAN_ACTIVATE_PULL,
GST_LADSPA_SINK_PROP_NUM_BUFFERS,
GST_LADSPA_SINK_PROP_LAST
};
static GstLADSPASinkClass *gst_ladspa_sink_type_parent_class = NULL;
/*
* Boilerplates BaseSink add pad.
*/
void
gst_my_base_sink_class_add_pad_template (GstBaseSinkClass * base_class,
GstCaps * sinkcaps)
{
GstElementClass *elem_class = GST_ELEMENT_CLASS (base_class);
GstPadTemplate *pad_template;
g_return_if_fail (GST_IS_CAPS (sinkcaps));
pad_template =
gst_pad_template_new (GST_BASE_TRANSFORM_SINK_NAME, GST_PAD_SINK,
GST_PAD_ALWAYS, sinkcaps);
gst_element_class_add_pad_template (elem_class, pad_template);
}
static gboolean
gst_ladspa_sink_type_set_caps (GstBaseSink * base, GstCaps * caps)
{
GstLADSPASink *ladspa = GST_LADSPA_SINK (base);
GstAudioInfo info;
if (!gst_audio_info_from_caps (&info, caps)) {
GST_ERROR_OBJECT (base, "received invalid caps");
return FALSE;
}
GST_DEBUG_OBJECT (ladspa, "negotiated to caps %" GST_PTR_FORMAT, caps);
ladspa->info = info;
return gst_ladspa_setup (&ladspa->ladspa, GST_AUDIO_INFO_RATE (&info));
}
static gboolean
gst_ladspa_sink_type_query (GstBaseSink * base, GstQuery * query)
{
gboolean ret;
switch (GST_QUERY_TYPE (query)) {
case GST_QUERY_SEEKING:{
GstFormat fmt;
/* we don't supporting seeking */
gst_query_parse_seeking (query, &fmt, NULL, NULL, NULL);
gst_query_set_seeking (query, fmt, FALSE, 0, -1);
ret = TRUE;
break;
}
default:
ret =
GST_BASE_SINK_CLASS (gst_ladspa_sink_type_parent_class)->query
(base, query);
break;
}
return ret;
}
static GstFlowReturn
gst_ladspa_sink_type_preroll (GstBaseSink * base, GstBuffer * buffer)
{
GstLADSPASink *ladspa = GST_LADSPA_SINK (base);
if (ladspa->num_buffers_left == 0) {
GST_DEBUG_OBJECT (ladspa, "we are EOS");
return GST_FLOW_EOS;
}
return GST_FLOW_OK;
}
static GstFlowReturn
gst_ladspa_sink_type_render (GstBaseSink * base, GstBuffer * buf)
{
GstLADSPASink *ladspa = GST_LADSPA_SINK (base);
GstMapInfo info;
if (ladspa->num_buffers_left == 0)
goto eos;
if (ladspa->num_buffers_left != -1)
ladspa->num_buffers_left--;
gst_object_sync_values (GST_OBJECT (ladspa), GST_BUFFER_TIMESTAMP (buf));
gst_buffer_map (buf, &info, GST_MAP_READ);
gst_ladspa_transform (&ladspa->ladspa, NULL,
info.size / sizeof (LADSPA_Data) / ladspa->ladspa.klass->count.audio.in,
info.data);
gst_buffer_unmap (buf, &info);
if (ladspa->num_buffers_left == 0)
goto eos;
return GST_FLOW_OK;
/* ERRORS */
eos:
{
GST_DEBUG_OBJECT (ladspa, "we are EOS");
return GST_FLOW_EOS;
}
}
static GstStateChangeReturn
gst_ladspa_sink_type_change_state (GstElement * element,
GstStateChange transition)
{
GstLADSPASink *ladspa = GST_LADSPA_SINK (element);
GstStateChangeReturn ret = GST_STATE_CHANGE_SUCCESS;
switch (transition) {
case GST_STATE_CHANGE_READY_TO_PAUSED:
ladspa->num_buffers_left = ladspa->num_buffers;
break;
default:
break;
}
ret =
GST_ELEMENT_CLASS (gst_ladspa_sink_type_parent_class)->change_state
(element, transition);
return ret;
}
static void
gst_ladspa_sink_type_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec)
{
GstLADSPASink *ladspa = GST_LADSPA_SINK (object);
switch (prop_id) {
case GST_LADSPA_SINK_PROP_CAN_ACTIVATE_PUSH:
GST_BASE_SINK (ladspa)->can_activate_push = g_value_get_boolean (value);
break;
case GST_LADSPA_SINK_PROP_CAN_ACTIVATE_PULL:
GST_BASE_SINK (ladspa)->can_activate_pull = g_value_get_boolean (value);
break;
case GST_LADSPA_SINK_PROP_NUM_BUFFERS:
ladspa->num_buffers = g_value_get_int (value);
break;
default:
gst_ladspa_object_set_property (&ladspa->ladspa, object, prop_id, value,
pspec);
break;
}
}
static void
gst_ladspa_sink_type_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec)
{
GstLADSPASink *ladspa = GST_LADSPA_SINK (object);
switch (prop_id) {
case GST_LADSPA_SINK_PROP_CAN_ACTIVATE_PUSH:
g_value_set_boolean (value, GST_BASE_SINK (ladspa)->can_activate_push);
break;
case GST_LADSPA_SINK_PROP_CAN_ACTIVATE_PULL:
g_value_set_boolean (value, GST_BASE_SINK (ladspa)->can_activate_pull);
break;
case GST_LADSPA_SINK_PROP_NUM_BUFFERS:
g_value_set_int (value, ladspa->num_buffers);
break;
default:
gst_ladspa_object_get_property (&ladspa->ladspa, object, prop_id, value,
pspec);
break;
}
}
static void
gst_ladspa_sink_type_init (GstLADSPASink * ladspa, LADSPA_Descriptor * desc)
{
GstLADSPASinkClass *ladspa_class = GST_LADSPA_SINK_GET_CLASS (ladspa);
GstBaseSink *base = GST_BASE_SINK (ladspa);
gst_ladspa_init (&ladspa->ladspa, &ladspa_class->ladspa);
ladspa->num_buffers = GST_LADSPA_SINK_DEFAULT_NUM_BUFFERS;
gst_base_sink_set_sync (base, GST_LADSPA_SINK_DEFAULT_SYNC);
}
static void
gst_ladspa_sink_type_dispose (GObject * object)
{
GstLADSPASink *ladspa = GST_LADSPA_SINK (object);
gst_ladspa_cleanup (&ladspa->ladspa);
G_OBJECT_CLASS (gst_ladspa_sink_type_parent_class)->dispose (object);
}
static void
gst_ladspa_sink_type_finalize (GObject * object)
{
GstLADSPASink *ladspa = GST_LADSPA_SINK (object);
gst_ladspa_finalize (&ladspa->ladspa);
G_OBJECT_CLASS (gst_ladspa_sink_type_parent_class)->finalize (object);
}
/*
* It is okay for plugins to 'leak' a one-time allocation. This will be freed when
* the application exits. When the plugins are scanned for the first time, this is
* done from a separate process to not impose the memory overhead on the calling
* application (among other reasons). Hence no need for class_finalize.
*/
static void
gst_ladspa_sink_type_base_init (GstLADSPASinkClass * ladspa_class)
{
GstElementClass *elem_class = GST_ELEMENT_CLASS (ladspa_class);
GstBaseSinkClass *base_class = GST_BASE_SINK_CLASS (ladspa_class);
gst_ladspa_class_init (&ladspa_class->ladspa,
G_TYPE_FROM_CLASS (ladspa_class));
gst_ladspa_element_class_set_metadata (&ladspa_class->ladspa, elem_class,
GST_LADSPA_SINK_CLASS_TAGS);
gst_ladspa_sink_type_class_add_pad_template (&ladspa_class->ladspa,
base_class);
}
static void
gst_ladspa_sink_type_base_finalize (GstLADSPASinkClass * ladspa_class)
{
gst_ladspa_class_finalize (&ladspa_class->ladspa);
}
static void
gst_ladspa_sink_type_class_init (GstLADSPASinkClass * ladspa_class,
LADSPA_Descriptor * desc)
{
GObjectClass *object_class = G_OBJECT_CLASS (ladspa_class);
GstElementClass *elem_class = GST_ELEMENT_CLASS (ladspa_class);
GstBaseSinkClass *base_class = GST_BASE_SINK_CLASS (ladspa_class);
gst_ladspa_sink_type_parent_class = g_type_class_peek_parent (ladspa_class);
object_class->dispose = GST_DEBUG_FUNCPTR (gst_ladspa_sink_type_dispose);
object_class->finalize = GST_DEBUG_FUNCPTR (gst_ladspa_sink_type_finalize);
object_class->set_property =
GST_DEBUG_FUNCPTR (gst_ladspa_sink_type_set_property);
object_class->get_property =
GST_DEBUG_FUNCPTR (gst_ladspa_sink_type_get_property);
elem_class->change_state =
GST_DEBUG_FUNCPTR (gst_ladspa_sink_type_change_state);
base_class->set_caps = GST_DEBUG_FUNCPTR (gst_ladspa_sink_type_set_caps);
base_class->preroll = GST_DEBUG_FUNCPTR (gst_ladspa_sink_type_preroll);
base_class->render = GST_DEBUG_FUNCPTR (gst_ladspa_sink_type_render);
base_class->query = GST_DEBUG_FUNCPTR (gst_ladspa_sink_type_query);
g_object_class_install_property (object_class,
GST_LADSPA_SINK_PROP_CAN_ACTIVATE_PUSH,
g_param_spec_boolean ("can-activate-push", "Can activate push",
"Can activate in push mode",
GST_LADSPA_SINK_DEFAULT_CAN_ACTIVATE_PUSH,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (object_class,
GST_LADSPA_SINK_PROP_CAN_ACTIVATE_PULL,
g_param_spec_boolean ("can-activate-pull", "Can activate pull",
"Can activate in pull mode",
GST_LADSPA_SINK_DEFAULT_CAN_ACTIVATE_PULL,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (object_class,
GST_LADSPA_SINK_PROP_NUM_BUFFERS, g_param_spec_int ("num-buffers",
"num-buffers", "Number of buffers to accept going EOS", -1, G_MAXINT,
GST_LADSPA_SINK_DEFAULT_NUM_BUFFERS,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
gst_ladspa_object_class_install_properties (&ladspa_class->ladspa,
object_class, GST_LADSPA_SINK_PROP_LAST);
}
G_DEFINE_ABSTRACT_TYPE (GstLADSPASink, gst_ladspa_sink, GST_TYPE_BASE_SINK);
static void
gst_ladspa_sink_init (GstLADSPASink * ladspa)
{
}
static void
gst_ladspa_sink_class_init (GstLADSPASinkClass * ladspa_class)
{
}
/*
* Construct the type.
*/
void
ladspa_register_sink_element (GstPlugin * plugin, GstStructure * ladspa_meta)
{
GTypeInfo info = {
sizeof (GstLADSPASinkClass),
(GBaseInitFunc) gst_ladspa_sink_type_base_init,
(GBaseFinalizeFunc) gst_ladspa_sink_type_base_finalize,
(GClassInitFunc) gst_ladspa_sink_type_class_init,
NULL,
NULL,
sizeof (GstLADSPASink),
0,
(GInstanceInitFunc) gst_ladspa_sink_type_init,
NULL
};
ladspa_register_element (plugin, GST_TYPE_LADSPA_SINK, &info, ladspa_meta);
}