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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 <string.h>
#include "gstgsmdec.h"
extern GstPadTemplate *gsmdec_src_template, *gsmdec_sink_template;
/* elementfactory information */
GstElementDetails gst_gsmdec_details = {
"gsm audio decoder",
"Codec/Audio/Decoder",
".gsm",
VERSION,
"Wim Taymans <wim.taymans@chello.be>",
"(C) 2000",
};
/* GSMDec signals and args */
enum {
/* FILL ME */
LAST_SIGNAL
};
enum {
ARG_0,
/* FILL ME */
};
static void gst_gsmdec_class_init (GstGSMDec *klass);
static void gst_gsmdec_init (GstGSMDec *gsmdec);
static void gst_gsmdec_chain (GstPad *pad, GstBuffer *buf);
static GstPadConnectReturn gst_gsmdec_sinkconnect (GstPad *pad, GstCaps *caps);
static GstElementClass *parent_class = NULL;
/*static guint gst_gsmdec_signals[LAST_SIGNAL] = { 0 }; */
GType
gst_gsmdec_get_type(void) {
static GType gsmdec_type = 0;
if (!gsmdec_type) {
static const GTypeInfo gsmdec_info = {
sizeof(GstGSMDecClass), NULL,
NULL,
(GClassInitFunc)gst_gsmdec_class_init,
NULL,
NULL,
sizeof(GstGSMDec),
0,
(GInstanceInitFunc)gst_gsmdec_init,
};
gsmdec_type = g_type_register_static(GST_TYPE_ELEMENT, "GstGSMDec", &gsmdec_info, 0);
}
return gsmdec_type;
}
static void
gst_gsmdec_class_init (GstGSMDec *klass)
{
GstElementClass *gstelement_class;
gstelement_class = (GstElementClass*)klass;
parent_class = g_type_class_ref(GST_TYPE_ELEMENT);
}
static void
gst_gsmdec_init (GstGSMDec *gsmdec)
{
GST_DEBUG (0,"gst_gsmdec_init: initializing");
/* create the sink and src pads */
gsmdec->sinkpad = gst_pad_new_from_template (gsmdec_sink_template, "sink");
gst_element_add_pad (GST_ELEMENT (gsmdec), gsmdec->sinkpad);
gst_pad_set_chain_function (gsmdec->sinkpad, gst_gsmdec_chain);
gst_pad_set_connect_function (gsmdec->sinkpad, gst_gsmdec_sinkconnect);
gsmdec->srcpad = gst_pad_new_from_template (gsmdec_src_template, "src");
gst_element_add_pad (GST_ELEMENT (gsmdec), gsmdec->srcpad);
gsmdec->state = gsm_create ();
gsmdec->bufsize = 0;
}
static GstPadConnectReturn
gst_gsmdec_sinkconnect (GstPad *pad, GstCaps *caps)
{
GstGSMDec *gsmdec;
gint rate;
gsmdec = GST_GSMDEC (gst_pad_get_parent (pad));
if (!GST_CAPS_IS_FIXED (caps))
return GST_PAD_CONNECT_DELAYED;
gst_caps_get_int (caps, "rate", &rate);
if (gst_pad_try_set_caps (gsmdec->srcpad,
GST_CAPS_NEW (
"gsm_raw",
"audio/raw",
"format", GST_PROPS_STRING ("int"),
"law", GST_PROPS_INT (0),
"endianness", GST_PROPS_INT (G_BYTE_ORDER),
"signed", GST_PROPS_BOOLEAN (TRUE),
"width", GST_PROPS_INT (16),
"depth", GST_PROPS_INT (16),
"rate", GST_PROPS_INT (rate),
"channels", GST_PROPS_INT (1)
)) > 0)
{
return GST_PAD_CONNECT_OK;
}
return GST_PAD_CONNECT_REFUSED;
}
static void
gst_gsmdec_chain (GstPad *pad, GstBuffer *buf)
{
GstGSMDec *gsmdec;
gsm_byte *data;
guint size;
g_return_if_fail(pad != NULL);
g_return_if_fail(GST_IS_PAD(pad));
g_return_if_fail(buf != NULL);
/*g_return_if_fail(GST_IS_BUFFER(buf)); */
gsmdec = GST_GSMDEC (gst_pad_get_parent (pad));
data = (gsm_byte*) GST_BUFFER_DATA (buf);
size = GST_BUFFER_SIZE (buf);
if (gsmdec->bufsize && (gsmdec->bufsize + size >= 33)) {
GstBuffer *outbuf;
memcpy (gsmdec->buffer + gsmdec->bufsize, data, (33 - gsmdec->bufsize) * sizeof (gsm_byte));
outbuf = gst_buffer_new ();
GST_BUFFER_DATA (outbuf) = g_malloc (160 * sizeof (gsm_signal));
GST_BUFFER_SIZE (outbuf) = 160 * sizeof (gsm_signal);
gsm_decode (gsmdec->state, gsmdec->buffer, (gsm_signal *) GST_BUFFER_DATA (outbuf));
gst_pad_push (gsmdec->srcpad, outbuf);
size -= (33 - gsmdec->bufsize);
data += (33 - gsmdec->bufsize);
gsmdec->bufsize = 0;
}
while (size >= 33) {
GstBuffer *outbuf;
outbuf = gst_buffer_new ();
GST_BUFFER_DATA (outbuf) = g_malloc (160 * sizeof (gsm_signal));
GST_BUFFER_SIZE (outbuf) = 160 * sizeof (gsm_signal);
gsm_decode (gsmdec->state, data, (gsm_signal *)GST_BUFFER_DATA (outbuf));
gst_pad_push (gsmdec->srcpad, outbuf);
size -= 33;
data += 33;
}
if (size) {
memcpy (gsmdec->buffer + gsmdec->bufsize, data, size * sizeof (gsm_byte));
gsmdec->bufsize += size;
}
gst_buffer_unref(buf);
}
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