mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
synced 2024-12-04 23:46:43 +00:00
183 lines
4.8 KiB
C
183 lines
4.8 KiB
C
|
/* Gnome-Streamer
|
||
|
* 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",
|
||
|
"Filter/Decoder/Audio",
|
||
|
".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 void gst_gsmdec_newcaps (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\n");
|
||
|
|
||
|
/* 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_newcaps_function (gsmdec->sinkpad, gst_gsmdec_newcaps);
|
||
|
|
||
|
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 void
|
||
|
gst_gsmdec_newcaps (GstPad *pad, GstCaps *caps)
|
||
|
{
|
||
|
GstGSMDec *gsmdec;
|
||
|
|
||
|
gsmdec = GST_GSMDEC (gst_pad_get_parent (pad));
|
||
|
gst_pad_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 (gst_caps_get_int (caps, "rate")),
|
||
|
"channels", GST_PROPS_INT (1)
|
||
|
));
|
||
|
}
|
||
|
|
||
|
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);
|
||
|
}
|
||
|
|