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c3fac62611
Original commit message from CVS: fix descriptions and license blocks cut and paste anyone ?
340 lines
8.6 KiB
C
340 lines
8.6 KiB
C
/* GStreamer
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* Copyright (C) <2005> Wim Taymans <wim@fluendo.com>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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#ifdef HAVE_CONFIG_H
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# include "config.h"
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#endif
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#include <string.h>
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#include <gst/rtp/gstrtpbuffer.h>
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#include "gstrtph263pdepay.h"
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/* elementfactory information */
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static const GstElementDetails gst_rtp_h263pdepay_details =
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GST_ELEMENT_DETAILS ("RTP packet parser",
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"Codec/Depayr/Network",
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"Extracts H263+ video from RTP packets (RFC 2429)",
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"Wim Taymans <wim@fluendo.com>");
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/* RtpH263PDepay signals and args */
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enum
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{
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/* FILL ME */
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LAST_SIGNAL
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};
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enum
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{
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ARG_0,
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ARG_FREQUENCY
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};
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static GstStaticPadTemplate gst_rtp_h263p_depay_src_template =
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GST_STATIC_PAD_TEMPLATE ("src",
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GST_PAD_SRC,
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GST_PAD_ALWAYS,
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GST_STATIC_CAPS ("video/x-h263")
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);
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static GstStaticPadTemplate gst_rtp_h263p_depay_sink_template =
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GST_STATIC_PAD_TEMPLATE ("sink",
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GST_PAD_SINK,
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GST_PAD_ALWAYS,
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GST_STATIC_CAPS ("application/x-rtp, "
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"media = (string) \"video\", "
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"clock-rate = (int) 90000, " "encoding-name = (string) \"H263-1998\"")
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);
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GST_BOILERPLATE (GstRtpH263PDepay, gst_rtp_h263p_depay, GstBaseRTPDepayload,
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GST_TYPE_BASE_RTP_DEPAYLOAD);
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static void gst_rtp_h263p_depay_finalize (GObject * object);
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static void gst_rtp_h263p_depay_set_property (GObject * object, guint prop_id,
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const GValue * value, GParamSpec * pspec);
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static void gst_rtp_h263p_depay_get_property (GObject * object, guint prop_id,
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GValue * value, GParamSpec * pspec);
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static GstStateChangeReturn gst_rtp_h263p_depay_change_state (GstElement *
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element, GstStateChange transition);
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static GstBuffer *gst_rtp_h263p_depay_process (GstBaseRTPDepayload * depayload,
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GstBuffer * buf);
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gboolean gst_rtp_h263p_depay_setcaps (GstBaseRTPDepayload * filter,
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GstCaps * caps);
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static void
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gst_rtp_h263p_depay_base_init (gpointer klass)
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{
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GstElementClass *element_class = GST_ELEMENT_CLASS (klass);
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gst_element_class_add_pad_template (element_class,
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gst_static_pad_template_get (&gst_rtp_h263p_depay_src_template));
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gst_element_class_add_pad_template (element_class,
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gst_static_pad_template_get (&gst_rtp_h263p_depay_sink_template));
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gst_element_class_set_details (element_class, &gst_rtp_h263pdepay_details);
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}
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static void
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gst_rtp_h263p_depay_class_init (GstRtpH263PDepayClass * klass)
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{
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GObjectClass *gobject_class;
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GstElementClass *gstelement_class;
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GstBaseRTPDepayloadClass *gstbasertpdepayload_class;
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gobject_class = (GObjectClass *) klass;
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gstelement_class = (GstElementClass *) klass;
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gstbasertpdepayload_class = (GstBaseRTPDepayloadClass *) klass;
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parent_class = g_type_class_peek_parent (klass);
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gstbasertpdepayload_class->process = gst_rtp_h263p_depay_process;
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gstbasertpdepayload_class->set_caps = gst_rtp_h263p_depay_setcaps;
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gobject_class->finalize = gst_rtp_h263p_depay_finalize;
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gobject_class->set_property = gst_rtp_h263p_depay_set_property;
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gobject_class->get_property = gst_rtp_h263p_depay_get_property;
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gstelement_class->change_state = gst_rtp_h263p_depay_change_state;
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}
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static void
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gst_rtp_h263p_depay_init (GstRtpH263PDepay * rtph263pdepay,
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GstRtpH263PDepayClass * klass)
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{
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rtph263pdepay->adapter = gst_adapter_new ();
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}
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static void
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gst_rtp_h263p_depay_finalize (GObject * object)
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{
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GstRtpH263PDepay *rtph263pdepay;
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rtph263pdepay = GST_RTP_H263P_DEPAY (object);
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g_object_unref (rtph263pdepay->adapter);
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rtph263pdepay->adapter = NULL;
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G_OBJECT_CLASS (parent_class)->finalize (object);
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}
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// only on the sink
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gboolean
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gst_rtp_h263p_depay_setcaps (GstBaseRTPDepayload * filter, GstCaps * caps)
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{
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GstStructure *structure = gst_caps_get_structure (caps, 0);
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gint clock_rate = 90000; // default
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if (gst_structure_has_field (structure, "clock-rate")) {
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gst_structure_get_int (structure, "clock-rate", &clock_rate);
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}
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filter->clock_rate = clock_rate;
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return TRUE;
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}
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static GstBuffer *
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gst_rtp_h263p_depay_process (GstBaseRTPDepayload * depayload, GstBuffer * buf)
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{
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GstRtpH263PDepay *rtph263pdepay;
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GstBuffer *outbuf;
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/* GstRTPPayload pt; */
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rtph263pdepay = GST_RTP_H263P_DEPAY (depayload);
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if (!gst_rtp_buffer_validate (buf))
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goto bad_packet;
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/*
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if ((pt = gst_rtp_buffer_get_payload_type (buf)) != 0)
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goto bad_payload;
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*/
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{
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gint payload_len;
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guint8 *payload;
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gboolean P, V, M;
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guint32 timestamp;
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guint header_len;
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guint8 PLEN;
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payload_len = gst_rtp_buffer_get_payload_len (buf);
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payload = gst_rtp_buffer_get_payload (buf);
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header_len = 2;
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M = gst_rtp_buffer_get_marker (buf);
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P = (payload[0] & 0x04) == 0x04;
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V = (payload[0] & 0x02) == 0x02;
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PLEN = ((payload[0] & 0x1) << 5) | (payload[1] >> 3);
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if (V) {
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header_len++;
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}
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if (PLEN) {
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header_len += PLEN;
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}
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if (P) {
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header_len -= 2;
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payload[header_len] = 0;
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payload[header_len + 1] = 0;
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}
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/* strip off header */
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payload += header_len;
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payload_len -= header_len;
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timestamp = gst_rtp_buffer_get_timestamp (buf);
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if (M) {
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/* frame is completed: append to previous, push it out */
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guint len;
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guint avail;
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guint8 *data;
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avail = gst_adapter_available (rtph263pdepay->adapter);
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len = avail + payload_len;
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outbuf = gst_buffer_new_and_alloc (len + (len % 4) + 4);
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memset (GST_BUFFER_DATA (outbuf) + len, 0, (len % 4) + 4);
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GST_BUFFER_SIZE (outbuf) = len;
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/* prepend previous data */
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if (avail > 0) {
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data = (guint8 *) gst_adapter_peek (rtph263pdepay->adapter, avail);
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memcpy (GST_BUFFER_DATA (outbuf), data, avail);
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gst_adapter_flush (rtph263pdepay->adapter, avail);
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}
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memcpy (GST_BUFFER_DATA (outbuf) + avail, payload, payload_len);
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GST_BUFFER_TIMESTAMP (outbuf) =
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timestamp * GST_SECOND / depayload->clock_rate;
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gst_buffer_set_caps (outbuf,
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(GstCaps *) gst_pad_get_pad_template_caps (depayload->srcpad));
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return outbuf;
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} else {
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/* frame not completed: store in adapter */
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outbuf = gst_buffer_new_and_alloc (payload_len);
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memcpy (GST_BUFFER_DATA (outbuf), payload, payload_len);
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gst_adapter_push (rtph263pdepay->adapter, outbuf);
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}
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}
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return NULL;
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bad_packet:
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{
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GST_ELEMENT_WARNING (rtph263pdepay, STREAM, DECODE,
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("Packet did not validate"), (NULL));
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return NULL;
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}
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/*
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bad_payload:
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{
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GST_DEBUG ("Unexpected payload type %u", pt);
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gst_buffer_unref (buf);
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return GST_FLOW_ERROR;
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}
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*/
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}
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static void
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gst_rtp_h263p_depay_set_property (GObject * object, guint prop_id,
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const GValue * value, GParamSpec * pspec)
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{
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GstRtpH263PDepay *rtph263pdepay;
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rtph263pdepay = GST_RTP_H263P_DEPAY (object);
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switch (prop_id) {
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
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break;
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}
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}
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static void
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gst_rtp_h263p_depay_get_property (GObject * object, guint prop_id,
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GValue * value, GParamSpec * pspec)
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{
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GstRtpH263PDepay *rtph263pdepay;
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rtph263pdepay = GST_RTP_H263P_DEPAY (object);
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switch (prop_id) {
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
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break;
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}
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}
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static GstStateChangeReturn
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gst_rtp_h263p_depay_change_state (GstElement * element,
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GstStateChange transition)
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{
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GstRtpH263PDepay *rtph263pdepay;
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GstStateChangeReturn ret;
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rtph263pdepay = GST_RTP_H263P_DEPAY (element);
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switch (transition) {
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case GST_STATE_CHANGE_NULL_TO_READY:
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break;
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case GST_STATE_CHANGE_READY_TO_PAUSED:
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gst_adapter_clear (rtph263pdepay->adapter);
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break;
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default:
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break;
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}
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ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
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switch (transition) {
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case GST_STATE_CHANGE_READY_TO_NULL:
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break;
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default:
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break;
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}
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return ret;
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}
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gboolean
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gst_rtp_h263p_depay_plugin_init (GstPlugin * plugin)
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{
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return gst_element_register (plugin, "rtph263pdepay",
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GST_RANK_NONE, GST_TYPE_RTP_H263P_DEPAY);
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}
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