gstreamer/gst/rtp/gstrtpmp4vdepay.c

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/* 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
*/
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#include <gst/rtp/gstrtpbuffer.h>
#include <string.h>
#include "gstrtpmp4vdepay.h"
/* elementfactory information */
static GstElementDetails gst_rtp_mp4vdepay_details = {
"RTP packet parser",
"Codec/Depayr/Network",
"Extracts MPEG4 video from RTP packets (RFC 3016)",
"Wim Taymans <wim@fluendo.com>"
};
/* RtpMP4VDepay signals and args */
enum
{
/* FILL ME */
LAST_SIGNAL
};
enum
{
ARG_0,
ARG_FREQUENCY
};
static GstStaticPadTemplate gst_rtp_mp4v_depay_src_template =
GST_STATIC_PAD_TEMPLATE ("src",
GST_PAD_SRC,
GST_PAD_ALWAYS,
GST_STATIC_CAPS ("video/mpeg,"
"mpegversion=(int) 4," "systemstream=(boolean)false")
);
static GstStaticPadTemplate gst_rtp_mp4v_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) [1, MAX ], " "encoding-name = (string) \"MP4V-ES\""
/* All optional parameters
*
* "profile-level-id=[1,MAX]"
* "config="
*/
)
);
GST_BOILERPLATE (GstRtpMP4VDepay, gst_rtp_mp4v_depay, GstBaseRTPDepayload,
GST_TYPE_BASE_RTP_DEPAYLOAD);
static gboolean gst_rtp_mp4v_depay_setcaps (GstBaseRTPDepayload * depayload,
GstCaps * caps);
static GstBuffer *gst_rtp_mp4v_depay_process (GstBaseRTPDepayload * depayload,
GstBuffer * buf);
static void gst_rtp_mp4v_depay_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec);
static void gst_rtp_mp4v_depay_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec);
static GstStateChangeReturn gst_rtp_mp4v_depay_change_state (GstElement *
element, GstStateChange transition);
static void
gst_rtp_mp4v_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_mp4v_depay_src_template));
gst_element_class_add_pad_template (element_class,
gst_static_pad_template_get (&gst_rtp_mp4v_depay_sink_template));
gst_element_class_set_details (element_class, &gst_rtp_mp4vdepay_details);
}
static void
gst_rtp_mp4v_depay_class_init (GstRtpMP4VDepayClass * 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_ref (GST_TYPE_BASE_RTP_DEPAYLOAD);
gstbasertpdepayload_class->process = gst_rtp_mp4v_depay_process;
gstbasertpdepayload_class->set_caps = gst_rtp_mp4v_depay_setcaps;
gobject_class->set_property = gst_rtp_mp4v_depay_set_property;
gobject_class->get_property = gst_rtp_mp4v_depay_get_property;
gstelement_class->change_state = gst_rtp_mp4v_depay_change_state;
}
static void
gst_rtp_mp4v_depay_init (GstRtpMP4VDepay * rtpmp4vdepay,
GstRtpMP4VDepayClass * klass)
{
}
static gboolean
gst_rtp_mp4v_depay_setcaps (GstBaseRTPDepayload * depayload, GstCaps * caps)
{
GstStructure *structure;
GstRtpMP4VDepay *rtpmp4vdepay;
GstCaps *srccaps;
const gchar *str;
gint clock_rate = 90000; /* default */
rtpmp4vdepay = GST_RTP_MP4V_DEPAY (depayload);
structure = gst_caps_get_structure (caps, 0);
if (gst_structure_has_field (structure, "clock-rate")) {
gst_structure_get_int (structure, "clock-rate", &clock_rate);
}
depayload->clock_rate = clock_rate;
srccaps = gst_caps_new_simple ("video/mpeg",
"mpegversion", G_TYPE_INT, 4,
"systemstream", G_TYPE_BOOLEAN, FALSE, NULL);
if ((str = gst_structure_get_string (structure, "config"))) {
GValue v = { 0 };
g_value_init (&v, GST_TYPE_BUFFER);
if (gst_value_deserialize (&v, str)) {
GstBuffer *buffer;
buffer = gst_value_get_buffer (&v);
gst_buffer_ref (buffer);
g_value_unset (&v);
gst_buffer_set_caps (buffer, srccaps);
gst_caps_unref (srccaps);
gst_pad_push (depayload->srcpad, buffer);
} else {
g_warning ("cannot convert config to buffer");
}
}
return TRUE;
}
static GstBuffer *
gst_rtp_mp4v_depay_process (GstBaseRTPDepayload * depayload, GstBuffer * buf)
{
GstRtpMP4VDepay *rtpmp4vdepay;
GstBuffer *outbuf;
rtpmp4vdepay = GST_RTP_MP4V_DEPAY (depayload);
if (!gst_rtp_buffer_validate (buf))
goto bad_packet;
{
gint payload_len;
guint8 *payload;
guint32 timestamp;
payload_len = gst_rtp_buffer_get_payload_len (buf);
payload = gst_rtp_buffer_get_payload (buf);
timestamp = gst_rtp_buffer_get_timestamp (buf);
outbuf = gst_buffer_new_and_alloc (payload_len);
memcpy (GST_BUFFER_DATA (outbuf), payload, payload_len);
gst_adapter_push (rtpmp4vdepay->adapter, outbuf);
/* if this was the last packet of the VOP, create and push a buffer */
if (gst_rtp_buffer_get_marker (buf)) {
guint avail;
avail = gst_adapter_available (rtpmp4vdepay->adapter);
outbuf = gst_buffer_new_and_alloc (avail);
GST_BUFFER_MALLOCDATA (outbuf) =
gst_adapter_take (rtpmp4vdepay->adapter, avail);
GST_BUFFER_DATA (outbuf) = GST_BUFFER_MALLOCDATA (outbuf);
gst_buffer_set_caps (outbuf, GST_PAD_CAPS (depayload->srcpad));
GST_BUFFER_TIMESTAMP (outbuf) =
timestamp * GST_SECOND / depayload->clock_rate;
GST_DEBUG ("gst_rtp_mp4v_depay_chain: pushing buffer of size %d",
GST_BUFFER_SIZE (outbuf));
return outbuf;
} else {
return NULL;
}
}
return NULL;
bad_packet:
{
GST_ELEMENT_WARNING (rtpmp4vdepay, STREAM, DECODE,
("Packet did not validate"), (NULL));
return NULL;
}
}
static void
gst_rtp_mp4v_depay_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec)
{
GstRtpMP4VDepay *rtpmp4vdepay;
rtpmp4vdepay = GST_RTP_MP4V_DEPAY (object);
switch (prop_id) {
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gst_rtp_mp4v_depay_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec)
{
GstRtpMP4VDepay *rtpmp4vdepay;
rtpmp4vdepay = GST_RTP_MP4V_DEPAY (object);
switch (prop_id) {
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static GstStateChangeReturn
gst_rtp_mp4v_depay_change_state (GstElement * element,
GstStateChange transition)
{
GstRtpMP4VDepay *rtpmp4vdepay;
GstStateChangeReturn ret;
rtpmp4vdepay = GST_RTP_MP4V_DEPAY (element);
switch (transition) {
case GST_STATE_CHANGE_NULL_TO_READY:
rtpmp4vdepay->adapter = gst_adapter_new ();
break;
case GST_STATE_CHANGE_READY_TO_PAUSED:
gst_adapter_clear (rtpmp4vdepay->adapter);
break;
default:
break;
}
ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
switch (transition) {
case GST_STATE_CHANGE_READY_TO_NULL:
g_object_unref (rtpmp4vdepay->adapter);
rtpmp4vdepay->adapter = NULL;
break;
default:
break;
}
return ret;
}
gboolean
gst_rtp_mp4v_depay_plugin_init (GstPlugin * plugin)
{
return gst_element_register (plugin, "rtpmp4vdepay",
GST_RANK_NONE, GST_TYPE_RTP_MP4V_DEPAY);
}