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/* GStreamer
* Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
*
* 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., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#include <gst/gst.h>
#include "mulaw-decode.h"
#include "mulaw-conversion.h"
extern GstPadTemplate *mulawdec_src_template, *mulawdec_sink_template;
/* Stereo signals and args */
enum {
/* FILL ME */
LAST_SIGNAL
};
enum {
ARG_0
};
static void gst_mulawdec_class_init (GstMuLawDecClass *klass);
static void gst_mulawdec_init (GstMuLawDec *mulawdec);
static void gst_mulawdec_set_property (GObject *object, guint prop_id, const GValue *value, GParamSpec *pspec);
static void gst_mulawdec_get_property (GObject *object, guint prop_id, GValue *value, GParamSpec *pspec);
static void gst_mulawdec_chain (GstPad *pad, GstBuffer *buf);
static GstElementClass *parent_class = NULL;
/*static guint gst_stereo_signals[LAST_SIGNAL] = { 0 };*/
static GstPadConnectReturn
mulawdec_connect_sink (GstPad *pad, GstCaps *caps)
{
GstCaps *newcaps;
GstMuLawDec* mulawdec=GST_MULAWDEC (GST_OBJECT_PARENT (pad));
if (caps==NULL)
return GST_PAD_LINK_REFUSED;
newcaps = gst_caps_copy(caps);
gst_caps_set(newcaps,"format",GST_PROPS_STRING("int"));
gst_caps_set(newcaps,"law",GST_PROPS_INT(0));
gst_caps_set(newcaps,"depth",GST_PROPS_INT(16));
gst_caps_set(newcaps,"width",GST_PROPS_INT(16));
gst_caps_set(newcaps,"signed",GST_PROPS_BOOLEAN(TRUE));
if (GST_CAPS_IS_FIXED (newcaps))
return gst_pad_try_set_caps (mulawdec->srcpad, newcaps);
return GST_PAD_LINK_DELAYED;
}
GType
gst_mulawdec_get_type(void) {
static GType mulawdec_type = 0;
if (!mulawdec_type) {
static const GTypeInfo mulawdec_info = {
sizeof(GstMuLawDecClass), NULL,
NULL,
(GClassInitFunc)gst_mulawdec_class_init,
NULL,
NULL,
sizeof(GstMuLawDec),
0,
(GInstanceInitFunc)gst_mulawdec_init,
};
mulawdec_type = g_type_register_static(GST_TYPE_ELEMENT, "GstMuLawDec", &mulawdec_info, 0);
}
return mulawdec_type;
}
static void
gst_mulawdec_class_init (GstMuLawDecClass *klass)
{
GObjectClass *gobject_class;
GstElementClass *gstelement_class;
gobject_class = (GObjectClass*)klass;
gstelement_class = (GstElementClass*)klass;
parent_class = g_type_class_ref(GST_TYPE_ELEMENT);
gobject_class->set_property = gst_mulawdec_set_property;
gobject_class->get_property = gst_mulawdec_get_property;
}
static void
gst_mulawdec_init (GstMuLawDec *mulawdec)
{
mulawdec->sinkpad = gst_pad_new_from_template(mulawdec_sink_template,"sink");
mulawdec->srcpad = gst_pad_new_from_template(mulawdec_src_template,"src");
gst_pad_set_link_function(mulawdec->sinkpad, mulawdec_connect_sink);
gst_element_add_pad(GST_ELEMENT(mulawdec),mulawdec->sinkpad);
gst_pad_set_chain_function(mulawdec->sinkpad,gst_mulawdec_chain);
gst_element_add_pad(GST_ELEMENT(mulawdec),mulawdec->srcpad);
}
static void
gst_mulawdec_chain (GstPad *pad,GstBuffer *buf)
{
GstMuLawDec *mulawdec;
gint16 *linear_data;
guint8 *mulaw_data;
GstBuffer* outbuf;
g_return_if_fail(pad != NULL);
g_return_if_fail(GST_IS_PAD(pad));
g_return_if_fail(buf != NULL);
mulawdec = GST_MULAWDEC(GST_OBJECT_PARENT (pad));
g_return_if_fail(mulawdec != NULL);
g_return_if_fail(GST_IS_MULAWDEC(mulawdec));
mulaw_data = (guint8 *)GST_BUFFER_DATA(buf);
outbuf=gst_buffer_new();
GST_BUFFER_DATA(outbuf) = (gchar*)g_new(gint16,GST_BUFFER_SIZE(buf));
GST_BUFFER_SIZE(outbuf) = GST_BUFFER_SIZE(buf)*2;
linear_data = (gint16*)GST_BUFFER_DATA(outbuf);
mulaw_decode(mulaw_data,linear_data,GST_BUFFER_SIZE(buf));
gst_buffer_unref(buf);
gst_pad_push(mulawdec->srcpad,outbuf);
}
static void
gst_mulawdec_set_property (GObject *object, guint prop_id, const GValue *value, GParamSpec *pspec)
{
GstMuLawDec *mulawdec;
/* it's not null if we got it, but it might not be ours */
g_return_if_fail(GST_IS_MULAWDEC(object));
mulawdec = GST_MULAWDEC(object);
switch (prop_id) {
default:
break;
}
}
static void
gst_mulawdec_get_property (GObject *object, guint prop_id, GValue *value, GParamSpec *pspec)
{
GstMuLawDec *mulawdec;
/* it's not null if we got it, but it might not be ours */
g_return_if_fail(GST_IS_MULAWDEC(object));
mulawdec = GST_MULAWDEC(object);
switch (prop_id) {
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
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