mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
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fc158bc3c2
Original commit message from CVS: Updates to payloader/depayloaders, make payloaders use the base classes. Updated README with suggested RTP caps and how to convert to/from SDP. Added config descriptor in mp4v payloader.
286 lines
7.3 KiB
C
286 lines
7.3 KiB
C
/* GStreamer
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* Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
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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 <zak147@yahoo.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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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_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) [ 1000, 48000 ]")
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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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);
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static void gst_rtpgsmparse_class_init (GstRtpGSMParseClass * klass);
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static void gst_rtpgsmparse_base_init (GstRtpGSMParseClass * klass);
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static void gst_rtpgsmparse_init (GstRtpGSMParse * rtpgsmparse);
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static GstFlowReturn gst_rtpgsmparse_chain (GstPad * pad, GstBuffer * buffer);
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static void gst_rtpgsmparse_set_property (GObject * object, guint prop_id,
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const GValue * value, GParamSpec * pspec);
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static void gst_rtpgsmparse_get_property (GObject * object, guint prop_id,
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GValue * value, GParamSpec * pspec);
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static GstStateChangeReturn gst_rtpgsmparse_change_state (GstElement * element,
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GstStateChange transition);
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static GstElementClass *parent_class = NULL;
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static GType
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gst_rtpgsmparse_get_type (void)
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{
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static GType rtpgsmparse_type = 0;
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if (!rtpgsmparse_type) {
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static const GTypeInfo rtpgsmparse_info = {
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sizeof (GstRtpGSMParseClass),
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(GBaseInitFunc) gst_rtpgsmparse_base_init,
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NULL,
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(GClassInitFunc) gst_rtpgsmparse_class_init,
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NULL,
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NULL,
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sizeof (GstRtpGSMParse),
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0,
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(GInstanceInitFunc) gst_rtpgsmparse_init,
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};
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rtpgsmparse_type =
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g_type_register_static (GST_TYPE_ELEMENT, "GstRtpGSMParse",
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&rtpgsmparse_info, 0);
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}
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return rtpgsmparse_type;
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}
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static void
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gst_rtpgsmparse_base_init (GstRtpGSMParseClass * 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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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->set_property = gst_rtpgsmparse_set_property;
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gobject_class->get_property = gst_rtpgsmparse_get_property;
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g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_FREQUENCY,
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g_param_spec_int ("frequency", "frequency", "frequency",
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G_MININT, G_MAXINT, 8000, G_PARAM_READWRITE));
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gstelement_class->change_state = gst_rtpgsmparse_change_state;
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}
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static void
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gst_rtpgsmparse_init (GstRtpGSMParse * rtpgsmparse)
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{
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rtpgsmparse->srcpad =
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gst_pad_new_from_template (gst_static_pad_template_get
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(&gst_rtpgsmparse_src_template), "src");
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rtpgsmparse->sinkpad =
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gst_pad_new_from_template (gst_static_pad_template_get
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(&gst_rtpgsmparse_sink_template), "sink");
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gst_element_add_pad (GST_ELEMENT (rtpgsmparse), rtpgsmparse->srcpad);
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gst_element_add_pad (GST_ELEMENT (rtpgsmparse), rtpgsmparse->sinkpad);
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gst_pad_set_chain_function (rtpgsmparse->sinkpad, gst_rtpgsmparse_chain);
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rtpgsmparse->frequency = 8000;
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}
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static void
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gst_rtpgsm_caps_nego (GstRtpGSMParse * rtpgsmparse)
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{
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GstCaps *caps;
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caps = gst_caps_new_simple ("audio/x-gsm",
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"rate", G_TYPE_INT, rtpgsmparse->frequency, NULL);
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gst_pad_set_caps (rtpgsmparse->srcpad, caps);
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gst_caps_unref (caps);
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}
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static GstFlowReturn
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gst_rtpgsmparse_chain (GstPad * pad, GstBuffer * buf)
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{
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GstRtpGSMParse *rtpgsmparse;
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GstBuffer *outbuf;
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GstFlowReturn ret;
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guint8 pt;
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rtpgsmparse = GST_RTP_GSM_PARSE (gst_pad_get_parent (pad));
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if (GST_PAD_CAPS (rtpgsmparse->srcpad) == NULL) {
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gst_rtpgsm_caps_nego (rtpgsmparse);
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}
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if (!gst_rtpbuffer_validate (buf))
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goto bad_packet;
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if ((pt = gst_rtpbuffer_get_payload_type (buf)) != GST_RTP_PAYLOAD_GSM)
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goto bad_payload;
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{
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gint payload_len;
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guint8 *payload;
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guint32 timestamp;
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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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timestamp = gst_rtpbuffer_get_timestamp (buf);
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outbuf = gst_buffer_new_and_alloc (payload_len);
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GST_BUFFER_TIMESTAMP (outbuf) = timestamp * GST_SECOND / 8000;
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memcpy (GST_BUFFER_DATA (outbuf), payload, payload_len);
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GST_DEBUG ("pushing buffer of size %d", GST_BUFFER_SIZE (outbuf));
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gst_buffer_unref (buf);
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ret = gst_pad_push (rtpgsmparse->srcpad, outbuf);
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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 did 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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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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static void
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gst_rtpgsmparse_set_property (GObject * object, guint prop_id,
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const GValue * value, GParamSpec * pspec)
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{
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GstRtpGSMParse *rtpgsmparse;
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rtpgsmparse = GST_RTP_GSM_PARSE (object);
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switch (prop_id) {
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case ARG_FREQUENCY:
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rtpgsmparse->frequency = g_value_get_int (value);
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break;
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default:
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break;
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}
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}
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static void
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gst_rtpgsmparse_get_property (GObject * object, guint prop_id, GValue * value,
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GParamSpec * pspec)
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{
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GstRtpGSMParse *rtpgsmparse;
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rtpgsmparse = GST_RTP_GSM_PARSE (object);
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switch (prop_id) {
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case ARG_FREQUENCY:
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g_value_set_int (value, rtpgsmparse->frequency);
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break;
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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_rtpgsmparse_change_state (GstElement * element, GstStateChange transition)
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{
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GstRtpGSMParse *rtpgsmparse;
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GstStateChangeReturn ret;
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rtpgsmparse = GST_RTP_GSM_PARSE (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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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_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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