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144 lines
4.4 KiB
C
144 lines
4.4 KiB
C
/* GStreamer
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* Copyright (C) <2008> Wim Taymans <wim.taymans@gmail.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 <gst/rtp/gstrtpbuffer.h>
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#include <string.h>
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#include "gstrtpmp1sdepay.h"
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/* RtpMP1SDepay 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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PROP_0,
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PROP_LAST
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};
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static GstStaticPadTemplate gst_rtp_mp1s_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/mpeg,systemstream=(boolean)true")
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);
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/* The spec says video/MP1S but I have seen streams with other/MP1S so we will
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* allow them both */
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static GstStaticPadTemplate gst_rtp_mp1s_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) \"other\", "
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"payload = (int) " GST_RTP_PAYLOAD_DYNAMIC_STRING ", "
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"clock-rate = (int) [1, MAX ], " "encoding-name = (string) \"MP1S\";"
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"application/x-rtp, "
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"media = (string) \"video\", "
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"payload = (int) " GST_RTP_PAYLOAD_DYNAMIC_STRING ", "
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"clock-rate = (int) [1, MAX ], " "encoding-name = (string) \"MP1S\"")
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);
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G_DEFINE_TYPE (GstRtpMP1SDepay, gst_rtp_mp1s_depay,
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GST_TYPE_RTP_BASE_DEPAYLOAD);
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static gboolean gst_rtp_mp1s_depay_setcaps (GstRTPBaseDepayload * depayload,
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GstCaps * caps);
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static GstBuffer *gst_rtp_mp1s_depay_process (GstRTPBaseDepayload * depayload,
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GstBuffer * buf);
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static void
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gst_rtp_mp1s_depay_class_init (GstRtpMP1SDepayClass * klass)
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{
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GstElementClass *gstelement_class;
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GstRTPBaseDepayloadClass *gstrtpbasedepayload_class;
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gstelement_class = (GstElementClass *) klass;
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gstrtpbasedepayload_class = (GstRTPBaseDepayloadClass *) klass;
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gstrtpbasedepayload_class->process = gst_rtp_mp1s_depay_process;
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gstrtpbasedepayload_class->set_caps = gst_rtp_mp1s_depay_setcaps;
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gst_element_class_add_pad_template (gstelement_class,
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gst_static_pad_template_get (&gst_rtp_mp1s_depay_src_template));
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gst_element_class_add_pad_template (gstelement_class,
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gst_static_pad_template_get (&gst_rtp_mp1s_depay_sink_template));
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gst_element_class_set_static_metadata (gstelement_class,
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"RTP MPEG1 System Stream depayloader", "Codec/Depayloader/Network/RTP",
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"Extracts MPEG1 System Streams from RTP packets (RFC 3555)",
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"Wim Taymans <wim.taymans@gmail.com>");
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}
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static void
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gst_rtp_mp1s_depay_init (GstRtpMP1SDepay * rtpmp1sdepay)
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{
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}
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static gboolean
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gst_rtp_mp1s_depay_setcaps (GstRTPBaseDepayload * depayload, GstCaps * caps)
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{
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GstCaps *srccaps;
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GstStructure *structure;
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gint clock_rate;
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gboolean res;
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structure = gst_caps_get_structure (caps, 0);
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if (!gst_structure_get_int (structure, "clock-rate", &clock_rate))
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clock_rate = 90000; /* default */
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depayload->clock_rate = clock_rate;
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srccaps = gst_caps_new_simple ("video/mpeg",
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"systemstream", G_TYPE_BOOLEAN, TRUE, NULL);
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res = gst_pad_set_caps (GST_RTP_BASE_DEPAYLOAD_SRCPAD (depayload), srccaps);
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gst_caps_unref (srccaps);
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return res;
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}
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static GstBuffer *
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gst_rtp_mp1s_depay_process (GstRTPBaseDepayload * depayload, GstBuffer * buf)
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{
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GstBuffer *outbuf;
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GstRTPBuffer rtp = { NULL };
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gst_rtp_buffer_map (buf, GST_MAP_READ, &rtp);
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outbuf = gst_rtp_buffer_get_payload_buffer (&rtp);
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gst_rtp_buffer_unmap (&rtp);
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if (outbuf)
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GST_DEBUG ("gst_rtp_mp1s_depay_chain: pushing buffer of size %"
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G_GSIZE_FORMAT, gst_buffer_get_size (outbuf));
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return outbuf;
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}
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gboolean
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gst_rtp_mp1s_depay_plugin_init (GstPlugin * plugin)
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{
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return gst_element_register (plugin, "rtpmp1sdepay",
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GST_RANK_SECONDARY, GST_TYPE_RTP_MP1S_DEPAY);
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}
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