gstreamer/gst/rtp/gstrtpmp4vdec.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 "gstrtpmp4vdec.h"
/* elementfactory information */
static GstElementDetails gst_rtp_mp4vdec_details = {
"RTP packet parser",
"Codec/Parser/Network",
"Extracts MPEG4 video from RTP packets (RFC 3016)",
"Wim Taymans <wim@fluendo.com>"
};
/* RtpMP4VDec signals and args */
enum
{
/* FILL ME */
LAST_SIGNAL
};
enum
{
ARG_0,
ARG_FREQUENCY
};
static GstStaticPadTemplate gst_rtpmp4vdec_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_rtpmp4vdec_sink_template =
GST_STATIC_PAD_TEMPLATE ("sink",
GST_PAD_SINK,
GST_PAD_ALWAYS,
GST_STATIC_CAPS ("application/x-rtp, "
"media = (string) \"video\", "
"payload = (int) [ 96, 255 ], "
"clock-rate = (int) [1, MAX ], " "encoding-name = (string) \"MP4V-ES\""
/* All optional parameters
*
* "profile-level-id=[1,MAX]"
* "config="
*/
)
);
static void gst_rtpmp4vdec_class_init (GstRtpMP4VDecClass * klass);
static void gst_rtpmp4vdec_base_init (GstRtpMP4VDecClass * klass);
static void gst_rtpmp4vdec_init (GstRtpMP4VDec * rtpmp4vdec);
static gboolean gst_rtpmp4vdec_setcaps (GstPad * pad, GstCaps * caps);
static GstFlowReturn gst_rtpmp4vdec_chain (GstPad * pad, GstBuffer * buffer);
static void gst_rtpmp4vdec_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec);
static void gst_rtpmp4vdec_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec);
static GstStateChangeReturn gst_rtpmp4vdec_change_state (GstElement * element,
GstStateChange transition);
static GstElementClass *parent_class = NULL;
static GType
gst_rtpmp4vdec_get_type (void)
{
static GType rtpmp4vdec_type = 0;
if (!rtpmp4vdec_type) {
static const GTypeInfo rtpmp4vdec_info = {
sizeof (GstRtpMP4VDecClass),
(GBaseInitFunc) gst_rtpmp4vdec_base_init,
NULL,
(GClassInitFunc) gst_rtpmp4vdec_class_init,
NULL,
NULL,
sizeof (GstRtpMP4VDec),
0,
(GInstanceInitFunc) gst_rtpmp4vdec_init,
};
rtpmp4vdec_type =
g_type_register_static (GST_TYPE_ELEMENT, "GstRtpMP4VDec",
&rtpmp4vdec_info, 0);
}
return rtpmp4vdec_type;
}
static void
gst_rtpmp4vdec_base_init (GstRtpMP4VDecClass * klass)
{
GstElementClass *element_class = GST_ELEMENT_CLASS (klass);
gst_element_class_add_pad_template (element_class,
gst_static_pad_template_get (&gst_rtpmp4vdec_src_template));
gst_element_class_add_pad_template (element_class,
gst_static_pad_template_get (&gst_rtpmp4vdec_sink_template));
gst_element_class_set_details (element_class, &gst_rtp_mp4vdec_details);
}
static void
gst_rtpmp4vdec_class_init (GstRtpMP4VDecClass * klass)
{
GObjectClass *gobject_class;
GstElementClass *gstelement_class;
gobject_class = (GObjectClass *) klass;
gstelement_class = (GstElementClass *) klass;
parent_class = g_type_class_ref (GST_TYPE_ELEMENT);
gobject_class->set_property = gst_rtpmp4vdec_set_property;
gobject_class->get_property = gst_rtpmp4vdec_get_property;
gstelement_class->change_state = gst_rtpmp4vdec_change_state;
}
static void
gst_rtpmp4vdec_init (GstRtpMP4VDec * rtpmp4vdec)
{
rtpmp4vdec->srcpad =
gst_pad_new_from_template (gst_static_pad_template_get
(&gst_rtpmp4vdec_src_template), "src");
gst_element_add_pad (GST_ELEMENT (rtpmp4vdec), rtpmp4vdec->srcpad);
rtpmp4vdec->sinkpad =
gst_pad_new_from_template (gst_static_pad_template_get
(&gst_rtpmp4vdec_sink_template), "sink");
gst_pad_set_setcaps_function (rtpmp4vdec->sinkpad, gst_rtpmp4vdec_setcaps);
gst_pad_set_chain_function (rtpmp4vdec->sinkpad, gst_rtpmp4vdec_chain);
gst_element_add_pad (GST_ELEMENT (rtpmp4vdec), rtpmp4vdec->sinkpad);
}
static gboolean
gst_rtpmp4vdec_setcaps (GstPad * pad, GstCaps * caps)
{
GstStructure *structure;
GstRtpMP4VDec *rtpmp4vdec;
GstCaps *srccaps;
const gchar *str;
rtpmp4vdec = GST_RTP_MP4V_DEC (GST_OBJECT_PARENT (pad));
structure = gst_caps_get_structure (caps, 0);
if (!gst_structure_get_int (structure, "clock-rate", &rtpmp4vdec->rate))
rtpmp4vdec->rate = 90000;
srccaps = gst_caps_new_simple ("video/mpeg",
"mpegversion", G_TYPE_INT, 4,
"systemstream", G_TYPE_BOOLEAN, FALSE, NULL);
gst_pad_set_caps (rtpmp4vdec->srcpad, srccaps);
gst_caps_unref (srccaps);
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, GST_PAD_CAPS (rtpmp4vdec->srcpad));
gst_pad_push (rtpmp4vdec->srcpad, buffer);
} else {
g_warning ("cannot convert config to buffer");
}
}
return TRUE;
}
static GstFlowReturn
gst_rtpmp4vdec_chain (GstPad * pad, GstBuffer * buf)
{
GstRtpMP4VDec *rtpmp4vdec;
GstBuffer *outbuf;
GstFlowReturn ret;
rtpmp4vdec = GST_RTP_MP4V_DEC (gst_pad_get_parent (pad));
if (!gst_rtpbuffer_validate (buf))
goto bad_packet;
{
gint payload_len;
guint8 *payload;
guint32 timestamp;
payload_len = gst_rtpbuffer_get_payload_len (buf);
payload = gst_rtpbuffer_get_payload (buf);
timestamp = gst_rtpbuffer_get_timestamp (buf);
outbuf = gst_buffer_new_and_alloc (payload_len);
memcpy (GST_BUFFER_DATA (outbuf), payload, payload_len);
gst_adapter_push (rtpmp4vdec->adapter, outbuf);
/* if this was the last packet of the VOP, create and push a buffer */
if (gst_rtpbuffer_get_marker (buf)) {
guint avail;
avail = gst_adapter_available (rtpmp4vdec->adapter);
outbuf = gst_buffer_new_and_alloc (avail);
GST_BUFFER_MALLOCDATA (outbuf) =
gst_adapter_take (rtpmp4vdec->adapter, avail);
GST_BUFFER_DATA (outbuf) = GST_BUFFER_MALLOCDATA (outbuf);
gst_buffer_set_caps (outbuf, GST_PAD_CAPS (rtpmp4vdec->srcpad));
GST_BUFFER_TIMESTAMP (outbuf) = timestamp * GST_SECOND / rtpmp4vdec->rate;
GST_DEBUG ("gst_rtpmp4vdec_chain: pushing buffer of size %d",
GST_BUFFER_SIZE (outbuf));
ret = gst_pad_push (rtpmp4vdec->srcpad, outbuf);
} else {
ret = GST_FLOW_OK;
}
gst_buffer_unref (buf);
}
gst_object_unref (rtpmp4vdec);
return ret;
bad_packet:
{
GST_DEBUG ("Packet did not validate");
gst_buffer_unref (buf);
gst_object_unref (rtpmp4vdec);
return GST_FLOW_ERROR;
}
}
static void
gst_rtpmp4vdec_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec)
{
GstRtpMP4VDec *rtpmp4vdec;
rtpmp4vdec = GST_RTP_MP4V_DEC (object);
switch (prop_id) {
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gst_rtpmp4vdec_get_property (GObject * object, guint prop_id, GValue * value,
GParamSpec * pspec)
{
GstRtpMP4VDec *rtpmp4vdec;
rtpmp4vdec = GST_RTP_MP4V_DEC (object);
switch (prop_id) {
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static GstStateChangeReturn
gst_rtpmp4vdec_change_state (GstElement * element, GstStateChange transition)
{
GstRtpMP4VDec *rtpmp4vdec;
GstStateChangeReturn ret;
rtpmp4vdec = GST_RTP_MP4V_DEC (element);
switch (transition) {
case GST_STATE_CHANGE_NULL_TO_READY:
rtpmp4vdec->adapter = gst_adapter_new ();
break;
case GST_STATE_CHANGE_READY_TO_PAUSED:
gst_adapter_clear (rtpmp4vdec->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 (rtpmp4vdec->adapter);
rtpmp4vdec->adapter = NULL;
break;
default:
break;
}
return ret;
}
gboolean
gst_rtpmp4vdec_plugin_init (GstPlugin * plugin)
{
return gst_element_register (plugin, "rtpmp4vdec",
GST_RANK_NONE, GST_TYPE_RTP_MP4V_DEC);
}