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67abe2f343
Original commit message from CVS: don't use underscores
342 lines
8.5 KiB
C
342 lines
8.5 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
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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 "gstrtph263pdec.h"
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/* elementfactory information */
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static GstElementDetails gst_rtp_h263pdec_details = {
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"RTP packet parser",
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"Codec/Parser/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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};
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/* RtpH263PDec 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_rtph263pdec_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_rtph263pdec_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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"payload = (int) [ 96, 255 ], "
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"clock-rate = (int) 90000, " "encoding-name = (string) \"H263-1998\"")
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);
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static void gst_rtph263pdec_class_init (GstRtpH263PDecClass * klass);
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static void gst_rtph263pdec_base_init (GstRtpH263PDecClass * klass);
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static void gst_rtph263pdec_init (GstRtpH263PDec * rtph263pdec);
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static void gst_rtph263pdec_finalize (GObject * object);
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static GstFlowReturn gst_rtph263pdec_chain (GstPad * pad, GstBuffer * buffer);
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static void gst_rtph263pdec_set_property (GObject * object, guint prop_id,
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const GValue * value, GParamSpec * pspec);
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static void gst_rtph263pdec_get_property (GObject * object, guint prop_id,
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GValue * value, GParamSpec * pspec);
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static GstStateChangeReturn gst_rtph263pdec_change_state (GstElement *
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element, GstStateChange transition);
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static GstElementClass *parent_class = NULL;
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static GType
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gst_rtph263pdec_get_type (void)
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{
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static GType rtph263pdec_type = 0;
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if (!rtph263pdec_type) {
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static const GTypeInfo rtph263pdec_info = {
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sizeof (GstRtpH263PDecClass),
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(GBaseInitFunc) gst_rtph263pdec_base_init,
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NULL,
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(GClassInitFunc) gst_rtph263pdec_class_init,
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NULL,
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NULL,
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sizeof (GstRtpH263PDec),
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0,
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(GInstanceInitFunc) gst_rtph263pdec_init,
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};
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rtph263pdec_type =
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g_type_register_static (GST_TYPE_ELEMENT, "GstRtpH263PDec",
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&rtph263pdec_info, 0);
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}
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return rtph263pdec_type;
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}
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static void
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gst_rtph263pdec_base_init (GstRtpH263PDecClass * 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_rtph263pdec_src_template));
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gst_element_class_add_pad_template (element_class,
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gst_static_pad_template_get (&gst_rtph263pdec_sink_template));
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gst_element_class_set_details (element_class, &gst_rtp_h263pdec_details);
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}
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static void
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gst_rtph263pdec_class_init (GstRtpH263PDecClass * klass)
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{
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GObjectClass *gobject_class;
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GstElementClass *gstelement_class;
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gobject_class = (GObjectClass *) klass;
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gstelement_class = (GstElementClass *) klass;
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parent_class = g_type_class_ref (GST_TYPE_ELEMENT);
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gobject_class->finalize = gst_rtph263pdec_finalize;
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gobject_class->set_property = gst_rtph263pdec_set_property;
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gobject_class->get_property = gst_rtph263pdec_get_property;
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gstelement_class->change_state = gst_rtph263pdec_change_state;
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}
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static void
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gst_rtph263pdec_init (GstRtpH263PDec * rtph263pdec)
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{
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rtph263pdec->srcpad =
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gst_pad_new_from_template (gst_static_pad_template_get
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(&gst_rtph263pdec_src_template), "src");
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gst_element_add_pad (GST_ELEMENT (rtph263pdec), rtph263pdec->srcpad);
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rtph263pdec->sinkpad =
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gst_pad_new_from_template (gst_static_pad_template_get
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(&gst_rtph263pdec_sink_template), "sink");
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gst_pad_set_chain_function (rtph263pdec->sinkpad, gst_rtph263pdec_chain);
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gst_element_add_pad (GST_ELEMENT (rtph263pdec), rtph263pdec->sinkpad);
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rtph263pdec->adapter = gst_adapter_new ();
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}
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static void
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gst_rtph263pdec_finalize (GObject * object)
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{
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GstRtpH263PDec *rtph263pdec;
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rtph263pdec = GST_RTP_H263P_DEC (object);
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g_object_unref (rtph263pdec->adapter);
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rtph263pdec->adapter = NULL;
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G_OBJECT_CLASS (parent_class)->finalize (object);
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}
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static GstFlowReturn
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gst_rtph263pdec_chain (GstPad * pad, GstBuffer * buf)
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{
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GstRtpH263PDec *rtph263pdec;
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GstBuffer *outbuf;
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GstFlowReturn ret;
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/* GstRTPPayload pt; */
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rtph263pdec = GST_RTP_H263P_DEC (GST_OBJECT_PARENT (pad));
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if (!gst_rtpbuffer_validate (buf))
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goto bad_packet;
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/*
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if ((pt = gst_rtpbuffer_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_rtpbuffer_get_payload_len (buf);
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payload = gst_rtpbuffer_get_payload (buf);
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header_len = 2;
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M = gst_rtpbuffer_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_rtpbuffer_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 avail;
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guint8 *data;
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avail = gst_adapter_available (rtph263pdec->adapter);
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outbuf = gst_buffer_new_and_alloc (avail + payload_len);
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/* prepend previous data */
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if (avail > 0) {
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data = (guint8 *) gst_adapter_peek (rtph263pdec->adapter, avail);
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memcpy (GST_BUFFER_DATA (outbuf), data, avail);
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gst_adapter_flush (rtph263pdec->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) = timestamp * GST_SECOND / 90000;
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gst_buffer_set_caps (outbuf,
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(GstCaps *) gst_pad_get_pad_template_caps (rtph263pdec->srcpad));
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ret = gst_pad_push (rtph263pdec->srcpad, 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 (rtph263pdec->adapter, outbuf);
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ret = GST_FLOW_OK;
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}
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gst_buffer_unref (buf);
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}
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return ret;
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bad_packet:
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{
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GST_DEBUG ("Packet does not validate");
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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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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_rtph263pdec_set_property (GObject * object, guint prop_id,
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const GValue * value, GParamSpec * pspec)
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{
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GstRtpH263PDec *rtph263pdec;
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rtph263pdec = GST_RTP_H263P_DEC (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_rtph263pdec_get_property (GObject * object, guint prop_id, GValue * value,
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GParamSpec * pspec)
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{
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GstRtpH263PDec *rtph263pdec;
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rtph263pdec = GST_RTP_H263P_DEC (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_rtph263pdec_change_state (GstElement * element, GstStateChange transition)
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{
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GstRtpH263PDec *rtph263pdec;
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GstStateChangeReturn ret;
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rtph263pdec = GST_RTP_H263P_DEC (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 (rtph263pdec->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_rtph263pdec_plugin_init (GstPlugin * plugin)
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{
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return gst_element_register (plugin, "rtph263pdec",
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GST_RANK_NONE, GST_TYPE_RTP_H263P_DEC);
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}
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