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137 lines
4.1 KiB
C
137 lines
4.1 KiB
C
/* GStreamer
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* Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
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* Copyright (C) <2005> Zeeshan Ali <zeenix@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
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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 "gstrtpgsmparse.h"
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/* elementfactory information */
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static GstElementDetails gst_rtp_gsmparse_details = {
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"RTP packet parser",
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"Codec/Parser/Network",
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"Extracts GSM audio from RTP packets",
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"Zeeshan Ali <zeenix@gmail.com>"
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};
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/* RTPGSMParse 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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static GstStaticPadTemplate gst_rtpgsmparse_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 ("audio/x-gsm, " "rate = (int) 8000, " "channels = 1")
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);
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static GstStaticPadTemplate gst_rtpgsmparse_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) \"audio\", "
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"payload = (int) [ 0, 255 ], "
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"clock-rate = (int) 8000, " "encoding-name = (string) \"GSM\"")
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);
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static GstBuffer *gst_rtpgsmparse_process (GstBaseRTPDepayload * depayload,
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GstBuffer * buf);
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static gboolean gst_rtpgsmparse_setcaps (GstBaseRTPDepayload * depayload,
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GstCaps * caps);
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GST_BOILERPLATE (GstRTPGSMParse, gst_rtpgsmparse, GstBaseRTPDepayload,
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GST_TYPE_BASE_RTP_DEPAYLOAD);
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static void
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gst_rtpgsmparse_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_rtpgsmparse_src_template));
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gst_element_class_add_pad_template (element_class,
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gst_static_pad_template_get (&gst_rtpgsmparse_sink_template));
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gst_element_class_set_details (element_class, &gst_rtp_gsmparse_details);
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}
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static void
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gst_rtpgsmparse_class_init (GstRTPGSMParseClass * 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_ref (GST_TYPE_BASE_RTP_DEPAYLOAD);
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gstbasertpdepayload_class->process = gst_rtpgsmparse_process;
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gstbasertpdepayload_class->set_caps = gst_rtpgsmparse_setcaps;
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}
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static void
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gst_rtpgsmparse_init (GstRTPGSMParse * rtpgsmparse, GstRTPGSMParseClass * klass)
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{
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GST_BASE_RTP_DEPAYLOAD (rtpgsmparse)->clock_rate = 8000;
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}
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static gboolean
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gst_rtpgsmparse_setcaps (GstBaseRTPDepayload * depayload, GstCaps * caps)
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{
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GstCaps *srccaps;
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gboolean ret;
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srccaps = gst_static_pad_template_get_caps (&gst_rtpgsmparse_src_template);
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ret = gst_pad_set_caps (GST_BASE_RTP_DEPAYLOAD_SRCPAD (depayload), srccaps);
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gst_caps_unref (srccaps);
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return ret;
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}
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static GstBuffer *
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gst_rtpgsmparse_process (GstBaseRTPDepayload * depayload, GstBuffer * buf)
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{
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GstBuffer *outbuf = NULL;
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gint payload_len;
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guint8 *payload;
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GST_DEBUG ("process : got %d bytes, mark %d ts %u seqn %d",
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GST_BUFFER_SIZE (buf),
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gst_rtpbuffer_get_marker (buf),
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gst_rtpbuffer_get_timestamp (buf), gst_rtpbuffer_get_seq (buf));
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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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outbuf = gst_buffer_new_and_alloc (payload_len);
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memcpy (GST_BUFFER_DATA (outbuf), payload, payload_len);
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return outbuf;
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}
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gboolean
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gst_rtpgsmparse_plugin_init (GstPlugin * plugin)
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{
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return gst_element_register (plugin, "rtpgsmparse",
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GST_RANK_NONE, GST_TYPE_RTP_GSM_PARSE);
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}
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