gstreamer/gst/rtp/gstrtph263pdepay.c
Thomas Vander Stichele c3fac62611 fix descriptions and license blocks cut and paste anyone ?
Original commit message from CVS:

fix descriptions and license blocks
cut and paste anyone ?
2006-05-22 13:51:30 +00:00

340 lines
8.6 KiB
C

/* GStreamer
* Copyright (C) <2005> Wim Taymans <wim@fluendo.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., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#include <string.h>
#include <gst/rtp/gstrtpbuffer.h>
#include "gstrtph263pdepay.h"
/* elementfactory information */
static const GstElementDetails gst_rtp_h263pdepay_details =
GST_ELEMENT_DETAILS ("RTP packet parser",
"Codec/Depayr/Network",
"Extracts H263+ video from RTP packets (RFC 2429)",
"Wim Taymans <wim@fluendo.com>");
/* RtpH263PDepay signals and args */
enum
{
/* FILL ME */
LAST_SIGNAL
};
enum
{
ARG_0,
ARG_FREQUENCY
};
static GstStaticPadTemplate gst_rtp_h263p_depay_src_template =
GST_STATIC_PAD_TEMPLATE ("src",
GST_PAD_SRC,
GST_PAD_ALWAYS,
GST_STATIC_CAPS ("video/x-h263")
);
static GstStaticPadTemplate gst_rtp_h263p_depay_sink_template =
GST_STATIC_PAD_TEMPLATE ("sink",
GST_PAD_SINK,
GST_PAD_ALWAYS,
GST_STATIC_CAPS ("application/x-rtp, "
"media = (string) \"video\", "
"clock-rate = (int) 90000, " "encoding-name = (string) \"H263-1998\"")
);
GST_BOILERPLATE (GstRtpH263PDepay, gst_rtp_h263p_depay, GstBaseRTPDepayload,
GST_TYPE_BASE_RTP_DEPAYLOAD);
static void gst_rtp_h263p_depay_finalize (GObject * object);
static void gst_rtp_h263p_depay_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec);
static void gst_rtp_h263p_depay_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec);
static GstStateChangeReturn gst_rtp_h263p_depay_change_state (GstElement *
element, GstStateChange transition);
static GstBuffer *gst_rtp_h263p_depay_process (GstBaseRTPDepayload * depayload,
GstBuffer * buf);
gboolean gst_rtp_h263p_depay_setcaps (GstBaseRTPDepayload * filter,
GstCaps * caps);
static void
gst_rtp_h263p_depay_base_init (gpointer klass)
{
GstElementClass *element_class = GST_ELEMENT_CLASS (klass);
gst_element_class_add_pad_template (element_class,
gst_static_pad_template_get (&gst_rtp_h263p_depay_src_template));
gst_element_class_add_pad_template (element_class,
gst_static_pad_template_get (&gst_rtp_h263p_depay_sink_template));
gst_element_class_set_details (element_class, &gst_rtp_h263pdepay_details);
}
static void
gst_rtp_h263p_depay_class_init (GstRtpH263PDepayClass * klass)
{
GObjectClass *gobject_class;
GstElementClass *gstelement_class;
GstBaseRTPDepayloadClass *gstbasertpdepayload_class;
gobject_class = (GObjectClass *) klass;
gstelement_class = (GstElementClass *) klass;
gstbasertpdepayload_class = (GstBaseRTPDepayloadClass *) klass;
parent_class = g_type_class_peek_parent (klass);
gstbasertpdepayload_class->process = gst_rtp_h263p_depay_process;
gstbasertpdepayload_class->set_caps = gst_rtp_h263p_depay_setcaps;
gobject_class->finalize = gst_rtp_h263p_depay_finalize;
gobject_class->set_property = gst_rtp_h263p_depay_set_property;
gobject_class->get_property = gst_rtp_h263p_depay_get_property;
gstelement_class->change_state = gst_rtp_h263p_depay_change_state;
}
static void
gst_rtp_h263p_depay_init (GstRtpH263PDepay * rtph263pdepay,
GstRtpH263PDepayClass * klass)
{
rtph263pdepay->adapter = gst_adapter_new ();
}
static void
gst_rtp_h263p_depay_finalize (GObject * object)
{
GstRtpH263PDepay *rtph263pdepay;
rtph263pdepay = GST_RTP_H263P_DEPAY (object);
g_object_unref (rtph263pdepay->adapter);
rtph263pdepay->adapter = NULL;
G_OBJECT_CLASS (parent_class)->finalize (object);
}
// only on the sink
gboolean
gst_rtp_h263p_depay_setcaps (GstBaseRTPDepayload * filter, GstCaps * caps)
{
GstStructure *structure = gst_caps_get_structure (caps, 0);
gint clock_rate = 90000; // default
if (gst_structure_has_field (structure, "clock-rate")) {
gst_structure_get_int (structure, "clock-rate", &clock_rate);
}
filter->clock_rate = clock_rate;
return TRUE;
}
static GstBuffer *
gst_rtp_h263p_depay_process (GstBaseRTPDepayload * depayload, GstBuffer * buf)
{
GstRtpH263PDepay *rtph263pdepay;
GstBuffer *outbuf;
/* GstRTPPayload pt; */
rtph263pdepay = GST_RTP_H263P_DEPAY (depayload);
if (!gst_rtp_buffer_validate (buf))
goto bad_packet;
/*
if ((pt = gst_rtp_buffer_get_payload_type (buf)) != 0)
goto bad_payload;
*/
{
gint payload_len;
guint8 *payload;
gboolean P, V, M;
guint32 timestamp;
guint header_len;
guint8 PLEN;
payload_len = gst_rtp_buffer_get_payload_len (buf);
payload = gst_rtp_buffer_get_payload (buf);
header_len = 2;
M = gst_rtp_buffer_get_marker (buf);
P = (payload[0] & 0x04) == 0x04;
V = (payload[0] & 0x02) == 0x02;
PLEN = ((payload[0] & 0x1) << 5) | (payload[1] >> 3);
if (V) {
header_len++;
}
if (PLEN) {
header_len += PLEN;
}
if (P) {
header_len -= 2;
payload[header_len] = 0;
payload[header_len + 1] = 0;
}
/* strip off header */
payload += header_len;
payload_len -= header_len;
timestamp = gst_rtp_buffer_get_timestamp (buf);
if (M) {
/* frame is completed: append to previous, push it out */
guint len;
guint avail;
guint8 *data;
avail = gst_adapter_available (rtph263pdepay->adapter);
len = avail + payload_len;
outbuf = gst_buffer_new_and_alloc (len + (len % 4) + 4);
memset (GST_BUFFER_DATA (outbuf) + len, 0, (len % 4) + 4);
GST_BUFFER_SIZE (outbuf) = len;
/* prepend previous data */
if (avail > 0) {
data = (guint8 *) gst_adapter_peek (rtph263pdepay->adapter, avail);
memcpy (GST_BUFFER_DATA (outbuf), data, avail);
gst_adapter_flush (rtph263pdepay->adapter, avail);
}
memcpy (GST_BUFFER_DATA (outbuf) + avail, payload, payload_len);
GST_BUFFER_TIMESTAMP (outbuf) =
timestamp * GST_SECOND / depayload->clock_rate;
gst_buffer_set_caps (outbuf,
(GstCaps *) gst_pad_get_pad_template_caps (depayload->srcpad));
return outbuf;
} else {
/* frame not completed: store in adapter */
outbuf = gst_buffer_new_and_alloc (payload_len);
memcpy (GST_BUFFER_DATA (outbuf), payload, payload_len);
gst_adapter_push (rtph263pdepay->adapter, outbuf);
}
}
return NULL;
bad_packet:
{
GST_ELEMENT_WARNING (rtph263pdepay, STREAM, DECODE,
("Packet did not validate"), (NULL));
return NULL;
}
/*
bad_payload:
{
GST_DEBUG ("Unexpected payload type %u", pt);
gst_buffer_unref (buf);
return GST_FLOW_ERROR;
}
*/
}
static void
gst_rtp_h263p_depay_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec)
{
GstRtpH263PDepay *rtph263pdepay;
rtph263pdepay = GST_RTP_H263P_DEPAY (object);
switch (prop_id) {
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gst_rtp_h263p_depay_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec)
{
GstRtpH263PDepay *rtph263pdepay;
rtph263pdepay = GST_RTP_H263P_DEPAY (object);
switch (prop_id) {
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static GstStateChangeReturn
gst_rtp_h263p_depay_change_state (GstElement * element,
GstStateChange transition)
{
GstRtpH263PDepay *rtph263pdepay;
GstStateChangeReturn ret;
rtph263pdepay = GST_RTP_H263P_DEPAY (element);
switch (transition) {
case GST_STATE_CHANGE_NULL_TO_READY:
break;
case GST_STATE_CHANGE_READY_TO_PAUSED:
gst_adapter_clear (rtph263pdepay->adapter);
break;
default:
break;
}
ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
switch (transition) {
case GST_STATE_CHANGE_READY_TO_NULL:
break;
default:
break;
}
return ret;
}
gboolean
gst_rtp_h263p_depay_plugin_init (GstPlugin * plugin)
{
return gst_element_register (plugin, "rtph263pdepay",
GST_RANK_NONE, GST_TYPE_RTP_H263P_DEPAY);
}