gstreamer/gst/rtp/gstrtph263penc.c
Thomas Vander Stichele 67abe2f343 don't use underscores
Original commit message from CVS:
don't use underscores
2005-09-20 10:51:51 +00:00

232 lines
6.4 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
*/
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#include <string.h>
#include <gst/rtp/gstrtpbuffer.h>
#include "gstrtph263penc.h"
/* elementfactory information */
static GstElementDetails gst_rtp_h263penc_details = {
"RTP packet parser",
"Codec/Parser/Network",
"Encodes H263+ video in RTP packets (RFC 2429)",
"Wim Taymans <wim@fluendo.com>"
};
static GstStaticPadTemplate gst_rtph263penc_sink_template =
GST_STATIC_PAD_TEMPLATE ("sink",
GST_PAD_SINK,
GST_PAD_ALWAYS,
GST_STATIC_CAPS ("video/x-h263")
);
static GstStaticPadTemplate gst_rtph263penc_src_template =
GST_STATIC_PAD_TEMPLATE ("src",
GST_PAD_SRC,
GST_PAD_ALWAYS,
GST_STATIC_CAPS ("application/x-rtp, "
"media = (string) \"video\", "
"payload = (int) [ 96, 255 ], "
"clock-rate = (int) 90000, " "encoding-name = (string) \"H263-1998\"")
);
static void gst_rtph263penc_class_init (GstRtpH263PEncClass * klass);
static void gst_rtph263penc_base_init (GstRtpH263PEncClass * klass);
static void gst_rtph263penc_init (GstRtpH263PEnc * rtph263penc);
static void gst_rtph263penc_finalize (GObject * object);
static gboolean gst_rtph263penc_setcaps (GstBaseRTPPayload * payload,
GstCaps * caps);
static GstFlowReturn gst_rtph263penc_handle_buffer (GstBaseRTPPayload * payload,
GstBuffer * buffer);
static GstBaseRTPPayloadClass *parent_class = NULL;
static GType
gst_rtph263penc_get_type (void)
{
static GType rtph263penc_type = 0;
if (!rtph263penc_type) {
static const GTypeInfo rtph263penc_info = {
sizeof (GstRtpH263PEncClass),
(GBaseInitFunc) gst_rtph263penc_base_init,
NULL,
(GClassInitFunc) gst_rtph263penc_class_init,
NULL,
NULL,
sizeof (GstRtpH263PEnc),
0,
(GInstanceInitFunc) gst_rtph263penc_init,
};
rtph263penc_type =
g_type_register_static (GST_TYPE_BASE_RTP_PAYLOAD, "GstRtpH263PEnc",
&rtph263penc_info, 0);
}
return rtph263penc_type;
}
static void
gst_rtph263penc_base_init (GstRtpH263PEncClass * klass)
{
GstElementClass *element_class = GST_ELEMENT_CLASS (klass);
gst_element_class_add_pad_template (element_class,
gst_static_pad_template_get (&gst_rtph263penc_src_template));
gst_element_class_add_pad_template (element_class,
gst_static_pad_template_get (&gst_rtph263penc_sink_template));
gst_element_class_set_details (element_class, &gst_rtp_h263penc_details);
}
static void
gst_rtph263penc_class_init (GstRtpH263PEncClass * klass)
{
GObjectClass *gobject_class;
GstElementClass *gstelement_class;
GstBaseRTPPayloadClass *gstbasertppayload_class;
gobject_class = (GObjectClass *) klass;
gstelement_class = (GstElementClass *) klass;
gstbasertppayload_class = (GstBaseRTPPayloadClass *) klass;
parent_class = g_type_class_ref (GST_TYPE_BASE_RTP_PAYLOAD);
gobject_class->finalize = gst_rtph263penc_finalize;
gstbasertppayload_class->set_caps = gst_rtph263penc_setcaps;
gstbasertppayload_class->handle_buffer = gst_rtph263penc_handle_buffer;
}
static void
gst_rtph263penc_init (GstRtpH263PEnc * rtph263penc)
{
rtph263penc->adapter = gst_adapter_new ();
}
static void
gst_rtph263penc_finalize (GObject * object)
{
GstRtpH263PEnc *rtph263penc;
rtph263penc = GST_RTP_H263P_ENC (object);
g_object_unref (rtph263penc->adapter);
rtph263penc->adapter = NULL;
G_OBJECT_CLASS (parent_class)->finalize (object);
}
static gboolean
gst_rtph263penc_setcaps (GstBaseRTPPayload * payload, GstCaps * caps)
{
gst_basertppayload_set_options (payload, "video", TRUE, "H263-1998", 90000);
gst_basertppayload_set_outcaps (payload, NULL);
return TRUE;
}
static GstFlowReturn
gst_rtph263penc_flush (GstRtpH263PEnc * rtph263penc)
{
guint avail;
GstBuffer *outbuf;
GstFlowReturn ret;
gboolean fragmented;
avail = gst_adapter_available (rtph263penc->adapter);
if (avail == 0)
return GST_FLOW_OK;
fragmented = FALSE;
while (avail > 0) {
guint towrite;
guint8 *payload;
guint8 *data;
guint payload_len;
gint header_len;
/* FIXME, do better mtu packing, header len etc should be
* included in this calculation. */
towrite = MIN (avail, GST_BASE_RTP_PAYLOAD_MTU (rtph263penc));
/* for fragmented frames we need 2 bytes header, for other
* frames we must reuse the first 2 bytes of the data as the
* header */
header_len = (fragmented ? 2 : 0);
payload_len = header_len + towrite;
outbuf = gst_rtpbuffer_new_allocate (payload_len, 0, 0);
/* last fragment gets the marker bit set */
gst_rtpbuffer_set_marker (outbuf, avail > towrite ? 0 : 1);
payload = gst_rtpbuffer_get_payload (outbuf);
data = (guint8 *) gst_adapter_peek (rtph263penc->adapter, towrite);
memcpy (&payload[header_len], data, towrite);
/* 0 1
* 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
* | RR |P|V| PLEN |PEBIT|
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
*/
payload[0] = fragmented ? 0x00 : 0x04;
payload[1] = 0;
GST_BUFFER_TIMESTAMP (outbuf) = rtph263penc->first_ts;
gst_adapter_flush (rtph263penc->adapter, towrite);
ret = gst_basertppayload_push (GST_BASE_RTP_PAYLOAD (rtph263penc), outbuf);
avail -= towrite;
fragmented = TRUE;
}
return ret;
}
static GstFlowReturn
gst_rtph263penc_handle_buffer (GstBaseRTPPayload * payload, GstBuffer * buffer)
{
GstRtpH263PEnc *rtph263penc;
GstFlowReturn ret;
guint size;
rtph263penc = GST_RTP_H263P_ENC (payload);
size = GST_BUFFER_SIZE (buffer);
rtph263penc->first_ts = GST_BUFFER_TIMESTAMP (buffer);
/* we always encode and flush a full picture */
gst_adapter_push (rtph263penc->adapter, buffer);
ret = gst_rtph263penc_flush (rtph263penc);
return ret;
}
gboolean
gst_rtph263penc_plugin_init (GstPlugin * plugin)
{
return gst_element_register (plugin, "rtph263penc",
GST_RANK_NONE, GST_TYPE_RTP_H263P_ENC);
}