gstreamer/gst/rtp/gstrtpL16depay.c
Thomas Vander Stichele fe967d4fe8 gst/rtp/: parsers are depayers
Original commit message from CVS:

* gst/rtp/Makefile.am:
* gst/rtp/gstrtpL16depay.c:
* gst/rtp/gstrtpL16depay.h:
* gst/rtp/gstrtpL16parse.c:
* gst/rtp/gstrtpL16parse.h:
* gst/rtp/gstrtpgsmdepay.c:
* gst/rtp/gstrtpgsmdepay.h:
* gst/rtp/gstrtpgsmparse.c:
* gst/rtp/gstrtpgsmparse.h:
parsers are depayers
2005-12-01 14:39:30 +00:00

347 lines
9.4 KiB
C

/* 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
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <string.h>
#include "gstrtpL16depay.h"
#include "gstrtp-common.h"
/* elementfactory information */
static GstElementDetails gst_rtp_L16depay_details = {
"RTP packet parser",
"Codec/Depayr/Network",
"Extracts raw audio from RTP packets",
"Zeeshan Ali <zak147@yahoo.com>"
};
/* RtpL16Depay signals and args */
enum
{
/* FILL ME */
LAST_SIGNAL
};
enum
{
ARG_0,
ARG_FREQUENCY,
ARG_PAYLOAD_TYPE
};
static GstStaticPadTemplate gst_rtp_L16depay_src_template =
GST_STATIC_PAD_TEMPLATE ("src",
GST_PAD_SRC,
GST_PAD_ALWAYS,
GST_STATIC_CAPS ("audio/x-raw-int, "
"endianness = (int) BYTE_ORDER, "
"signed = (boolean) true, "
"width = (int) 16, "
"depth = (int) 16, "
"rate = (int) [ 1000, 48000 ], " "channels = (int) [ 1, 2 ]")
);
static GstStaticPadTemplate gst_rtp_L16depay_sink_template =
GST_STATIC_PAD_TEMPLATE ("sink",
GST_PAD_SINK,
GST_PAD_ALWAYS,
GST_STATIC_CAPS ("application/x-rtp")
);
static void gst_rtp_L16depay_class_init (GstRtpL16DepayClass * klass);
static void gst_rtp_L16depay_base_init (GstRtpL16DepayClass * klass);
static void gst_rtp_L16depay_init (GstRtpL16Depay * rtpL16depay);
static void gst_rtp_L16depay_chain (GstPad * pad, GstData * _data);
static void gst_rtp_L16depay_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec);
static void gst_rtp_L16depay_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec);
static GstStateChangeReturn gst_rtp_L16depay_change_state (GstElement *
element);
static GstElementClass *parent_class = NULL;
static GType
gst_rtp_L16depay_get_type (void)
{
static GType rtpL16depay_type = 0;
if (!rtpL16depay_type) {
static const GTypeInfo rtpL16depay_info = {
sizeof (GstRtpL16DepayClass),
(GBaseInitFunc) gst_rtp_L16depay_base_init,
NULL,
(GClassInitFunc) gst_rtp_L16depay_class_init,
NULL,
NULL,
sizeof (GstRtpL16Depay),
0,
(GInstanceInitFunc) gst_rtp_L16depay_init,
};
rtpL16depay_type =
g_type_register_static (GST_TYPE_ELEMENT, "GstRtpL16Depay",
&rtpL16depay_info, 0);
}
return rtpL16depay_type;
}
static void
gst_rtp_L16depay_base_init (GstRtpL16DepayClass * klass)
{
GstElementClass *element_class = GST_ELEMENT_CLASS (klass);
gst_element_class_add_pad_template (element_class,
gst_static_pad_template_get (&gst_rtp_L16depay_src_template));
gst_element_class_add_pad_template (element_class,
gst_static_pad_template_get (&gst_rtp_L16depay_sink_template));
gst_element_class_set_details (element_class, &gst_rtp_L16depay_details);
}
static void
gst_rtp_L16depay_class_init (GstRtpL16DepayClass * klass)
{
GObjectClass *gobject_class;
GstElementClass *gstelement_class;
gobject_class = (GObjectClass *) klass;
gstelement_class = (GstElementClass *) klass;
parent_class = g_type_class_ref (GST_TYPE_ELEMENT);
g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_PAYLOAD_TYPE,
g_param_spec_int ("payload_type", "payload_type", "payload type",
G_MININT, G_MAXINT, PAYLOAD_L16_STEREO, G_PARAM_READABLE));
g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_FREQUENCY,
g_param_spec_int ("frequency", "frequency", "frequency",
G_MININT, G_MAXINT, 44100, G_PARAM_READWRITE));
gobject_class->set_property = gst_rtp_L16depay_set_property;
gobject_class->get_property = gst_rtp_L16depay_get_property;
gstelement_class->change_state = gst_rtp_L16depay_change_state;
}
static void
gst_rtp_L16depay_init (GstRtpL16Depay * rtpL16depay)
{
rtpL16depay->srcpad =
gst_pad_new_from_template (gst_static_pad_template_get
(&gst_rtp_L16depay_src_template), "src");
rtpL16depay->sinkpad =
gst_pad_new_from_template (gst_static_pad_template_get
(&gst_rtp_L16depay_sink_template), "sink");
gst_element_add_pad (GST_ELEMENT (rtpL16depay), rtpL16depay->srcpad);
gst_element_add_pad (GST_ELEMENT (rtpL16depay), rtpL16depay->sinkpad);
gst_pad_set_chain_function (rtpL16depay->sinkpad, gst_rtp_L16depay_chain);
rtpL16depay->frequency = 44100;
rtpL16depay->channels = 2;
rtpL16depay->payload_type = PAYLOAD_L16_STEREO;
}
void
gst_rtp_L16depay_ntohs (GstBuffer * buf)
{
gint16 *i, *len;
/* FIXME: is this code correct or even sane at all? */
i = (gint16 *) GST_BUFFER_DATA (buf);
len = i + GST_BUFFER_SIZE (buf) / sizeof (gint16 *);
for (; i < len; i++) {
*i = g_ntohs (*i);
}
}
void
gst_rtp_L16_caps_nego (GstRtpL16Depay * rtpL16depay)
{
GstCaps *caps;
caps =
gst_caps_copy (gst_static_caps_get (&gst_rtp_L16depay_src_template.
static_caps));
gst_caps_set_simple (caps,
"rate", G_TYPE_INT, rtpL16depay->frequency,
"channel", G_TYPE_INT, rtpL16depay->channels, NULL);
gst_pad_try_set_caps (rtpL16depay->srcpad, caps);
}
void
gst_rtp_L16depay_payloadtype_change (GstRtpL16Depay * rtpL16depay,
rtp_payload_t pt)
{
rtpL16depay->payload_type = pt;
switch (pt) {
case PAYLOAD_L16_MONO:
rtpL16depay->channels = 1;
break;
case PAYLOAD_L16_STEREO:
rtpL16depay->channels = 2;
break;
default:
g_warning ("unknown payload_t %d\n", pt);
}
gst_rtp_L16_caps_nego (rtpL16depay);
}
static void
gst_rtp_L16depay_chain (GstPad * pad, GstData * _data)
{
GstBuffer *buf = GST_BUFFER (_data);
GstRtpL16Depay *rtpL16depay;
GstBuffer *outbuf;
Rtp_Packet packet;
rtp_payload_t pt;
g_return_if_fail (pad != NULL);
g_return_if_fail (GST_IS_PAD (pad));
g_return_if_fail (buf != NULL);
rtpL16depay = GST_RTP_L16_DEPAY (GST_OBJECT_PARENT (pad));
g_return_if_fail (rtpL16depay != NULL);
g_return_if_fail (GST_IS_RTP_L16_DEPAY (rtpL16depay));
if (GST_IS_EVENT (buf)) {
GstEvent *event = GST_EVENT (buf);
gst_pad_event_default (pad, event);
return;
}
if (GST_PAD_CAPS (rtpL16depay->srcpad) == NULL) {
gst_rtp_L16_caps_nego (rtpL16depay);
}
packet =
rtp_packet_new_copy_data (GST_BUFFER_DATA (buf), GST_BUFFER_SIZE (buf));
pt = rtp_packet_get_payload_type (packet);
if (pt != rtpL16depay->payload_type) {
gst_rtp_L16depay_payloadtype_change (rtpL16depay, pt);
}
outbuf = gst_buffer_new ();
GST_BUFFER_SIZE (outbuf) = rtp_packet_get_payload_len (packet);
GST_BUFFER_DATA (outbuf) = g_malloc (GST_BUFFER_SIZE (outbuf));
GST_BUFFER_TIMESTAMP (outbuf) =
g_ntohl (rtp_packet_get_timestamp (packet)) * GST_SECOND;
memcpy (GST_BUFFER_DATA (outbuf), rtp_packet_get_payload (packet),
GST_BUFFER_SIZE (outbuf));
GST_DEBUG ("gst_rtp_L16depay_chain: pushing buffer of size %d",
GST_BUFFER_SIZE (outbuf));
/* FIXME: According to RFC 1890, this is required, right? */
#if G_BYTE_ORDER == G_LITTLE_ENDIAN
gst_rtp_L16depay_ntohs (outbuf);
#endif
gst_pad_push (rtpL16depay->srcpad, GST_DATA (outbuf));
rtp_packet_free (packet);
gst_buffer_unref (buf);
}
static void
gst_rtp_L16depay_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec)
{
GstRtpL16Depay *rtpL16depay;
g_return_if_fail (GST_IS_RTP_L16_DEPAY (object));
rtpL16depay = GST_RTP_L16_DEPAY (object);
switch (prop_id) {
case ARG_PAYLOAD_TYPE:
gst_rtp_L16depay_payloadtype_change (rtpL16depay,
g_value_get_int (value));
break;
case ARG_FREQUENCY:
rtpL16depay->frequency = g_value_get_int (value);
break;
default:
break;
}
}
static void
gst_rtp_L16depay_get_property (GObject * object, guint prop_id, GValue * value,
GParamSpec * pspec)
{
GstRtpL16Depay *rtpL16depay;
g_return_if_fail (GST_IS_RTP_L16_DEPAY (object));
rtpL16depay = GST_RTP_L16_DEPAY (object);
switch (prop_id) {
case ARG_PAYLOAD_TYPE:
g_value_set_int (value, rtpL16depay->payload_type);
break;
case ARG_FREQUENCY:
g_value_set_int (value, rtpL16depay->frequency);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static GstStateChangeReturn
gst_rtp_L16depay_change_state (GstElement * element, GstStateChange transition)
{
GstRtpL16Depay *rtpL16depay;
g_return_val_if_fail (GST_IS_RTP_L16_DEPAY (element),
GST_STATE_CHANGE_FAILURE);
rtpL16depay = GST_RTP_L16_DEPAY (element);
GST_DEBUG ("state pending %d\n", GST_STATE_PENDING (element));
switch (transition) {
case GST_STATE_CHANGE_NULL_TO_READY:
break;
case GST_STATE_CHANGE_READY_TO_NULL:
break;
default:
break;
}
/* if we haven't failed already, give the parent class a chance to ;-) */
if (GST_ELEMENT_CLASS (parent_class)->change_state)
return GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
return GST_STATE_CHANGE_SUCCESS;
}
gboolean
gst_rtp_L16depay_plugin_init (GstPlugin * plugin)
{
return gst_element_register (plugin, "rtpL16depay",
GST_RANK_NONE, GST_TYPE_RTP_L16_DEPAY);
}