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233 lines
6.9 KiB
C
233 lines
6.9 KiB
C
/* RTP DTMF muxer element for GStreamer
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*
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* gstrtpdtmfmux.c:
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*
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* Copyright (C) <2007-2010> Nokia Corporation.
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* Contact: Zeeshan Ali <zeeshan.ali@nokia.com>
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* Copyright (C) <2007-2010> Collabora Ltd
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* Contact: Olivier Crete <olivier.crete@collabora.co.uk>
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* Copyright (C) 1999,2000 Erik Walthinsen <omega@cse.ogi.edu>
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* 2000,2005 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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/**
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* SECTION:element-rtpdtmfmux
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* @see_also: rtpdtmfsrc, dtmfsrc, rtpmux
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*
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* The RTP "DTMF" Muxer muxes multiple RTP streams into a valid RTP
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* stream. It does exactly what it's parent (#rtpmux) does, except
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* that it prevent buffers coming over a regular sink_%%d pad from going through
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* for the duration of buffers that came in a priority_sink_%%d pad.
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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/gst.h>
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#include <string.h>
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#include "gstrtpdtmfmux.h"
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GST_DEBUG_CATEGORY_STATIC (gst_rtp_dtmf_mux_debug);
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#define GST_CAT_DEFAULT gst_rtp_dtmf_mux_debug
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enum
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{
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LAST_SIGNAL
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};
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static GstStaticPadTemplate priority_sink_factory =
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GST_STATIC_PAD_TEMPLATE ("priority_sink_%d",
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GST_PAD_SINK,
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GST_PAD_REQUEST,
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GST_STATIC_CAPS ("application/x-rtp"));
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// static guint gst_rtpdtmfmux_signals[LAST_SIGNAL] = { 0 };
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static GstPad *gst_rtp_dtmf_mux_request_new_pad (GstElement * element,
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GstPadTemplate * templ, const gchar * name);
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static GstStateChangeReturn gst_rtp_dtmf_mux_change_state (GstElement * element,
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GstStateChange transition);
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static GstFlowReturn gst_rtp_dtmf_mux_chain (GstPad * pad, GstBuffer * buffer);
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GST_BOILERPLATE (GstRTPDTMFMux, gst_rtp_dtmf_mux, GstRTPMux, GST_TYPE_RTP_MUX);
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static void
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gst_rtp_dtmf_mux_init (GstRTPDTMFMux * object, GstRTPDTMFMuxClass * g_class)
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{
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}
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static void
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gst_rtp_dtmf_mux_base_init (gpointer g_class)
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{
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GstElementClass *element_class = GST_ELEMENT_CLASS (g_class);
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gst_element_class_add_pad_template (element_class,
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gst_static_pad_template_get (&priority_sink_factory));
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gst_element_class_set_details_simple (element_class, "RTP muxer",
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"Codec/Muxer",
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"mixes RTP DTMF streams into other RTP streams",
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"Zeeshan Ali <first.last@nokia.com>");
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}
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static void
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gst_rtp_dtmf_mux_class_init (GstRTPDTMFMuxClass * klass)
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{
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GObjectClass *gobject_class;
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GstElementClass *gstelement_class;
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GstRTPMuxClass *gstrtpmux_class;
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gobject_class = (GObjectClass *) klass;
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gstelement_class = (GstElementClass *) klass;
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gstrtpmux_class = (GstRTPMuxClass *) klass;
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gstelement_class->request_new_pad =
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GST_DEBUG_FUNCPTR (gst_rtp_dtmf_mux_request_new_pad);
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gstelement_class->change_state =
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GST_DEBUG_FUNCPTR (gst_rtp_dtmf_mux_change_state);
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gstrtpmux_class->chain_func = GST_DEBUG_FUNCPTR (gst_rtp_dtmf_mux_chain);
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}
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static GstFlowReturn
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gst_rtp_dtmf_mux_chain (GstPad * pad, GstBuffer * buffer)
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{
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GstRTPDTMFMux *mux;
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GstFlowReturn ret = GST_FLOW_ERROR;
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GstRTPMuxPadPrivate *padpriv = NULL;
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GstClockTime running_ts;
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mux = GST_RTP_DTMF_MUX (gst_pad_get_parent (pad));
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running_ts = GST_BUFFER_TIMESTAMP (buffer);
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GST_OBJECT_LOCK (mux);
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if (GST_CLOCK_TIME_IS_VALID (running_ts)) {
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padpriv = gst_pad_get_element_private (pad);
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if (padpriv && padpriv->segment.format == GST_FORMAT_TIME)
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running_ts = gst_segment_to_running_time (&padpriv->segment,
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GST_FORMAT_TIME, GST_BUFFER_TIMESTAMP (buffer));
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if (padpriv && padpriv->priority) {
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if (GST_BUFFER_DURATION_IS_VALID (buffer)) {
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if (GST_CLOCK_TIME_IS_VALID (mux->last_priority_end))
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mux->last_priority_end =
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MAX (running_ts + GST_BUFFER_DURATION (buffer),
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mux->last_priority_end);
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else
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mux->last_priority_end = running_ts + GST_BUFFER_DURATION (buffer);
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GST_LOG_OBJECT (mux, "Got buffer %p on priority pad %s,"
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" blocking regular pads until %" GST_TIME_FORMAT, buffer,
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GST_PAD_NAME (pad), GST_TIME_ARGS (mux->last_priority_end));
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} else {
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GST_WARNING_OBJECT (mux, "Buffer %p on pad %s has an invalid duration,"
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" not blocking other pad", buffer, GST_PAD_NAME (pad));
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}
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} else {
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if (GST_CLOCK_TIME_IS_VALID (mux->last_priority_end) &&
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running_ts < mux->last_priority_end) {
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GST_LOG_OBJECT (mux, "Dropping buffer %p because running time"
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" %" GST_TIME_FORMAT " < %" GST_TIME_FORMAT, buffer,
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GST_TIME_ARGS (running_ts), GST_TIME_ARGS (mux->last_priority_end));
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goto drop_buffer;
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}
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}
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} else {
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GST_LOG_OBJECT (pad, "Buffer %p has an invalid timestamp,"
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" letting through", buffer);
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}
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GST_OBJECT_UNLOCK (mux);
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if (parent_class->chain_func)
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ret = parent_class->chain_func (pad, buffer);
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else
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gst_buffer_unref (buffer);
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out:
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gst_object_unref (mux);
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return ret;
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drop_buffer:
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gst_buffer_unref (buffer);
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ret = GST_FLOW_OK;
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GST_OBJECT_UNLOCK (mux);
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goto out;
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}
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static GstPad *
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gst_rtp_dtmf_mux_request_new_pad (GstElement * element, GstPadTemplate * templ,
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const gchar * name)
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{
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GstPad *pad;
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pad = GST_CALL_PARENT_WITH_DEFAULT (GST_ELEMENT_CLASS, request_new_pad,
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(element, templ, name), NULL);
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if (pad) {
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GstRTPMuxPadPrivate *padpriv;
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GST_OBJECT_LOCK (element);
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padpriv = gst_pad_get_element_private (pad);
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if (gst_element_class_get_pad_template (GST_ELEMENT_GET_CLASS (element),
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"priority_sink_%d") == gst_pad_get_pad_template (pad))
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padpriv->priority = TRUE;
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GST_OBJECT_UNLOCK (element);
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}
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return pad;
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}
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static GstStateChangeReturn
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gst_rtp_dtmf_mux_change_state (GstElement * element, GstStateChange transition)
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{
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GstStateChangeReturn ret;
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GstRTPDTMFMux *mux = GST_RTP_DTMF_MUX (element);
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switch (transition) {
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case GST_STATE_CHANGE_READY_TO_PAUSED:
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{
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GST_OBJECT_LOCK (mux);
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mux->last_priority_end = GST_CLOCK_TIME_NONE;
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GST_OBJECT_UNLOCK (mux);
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break;
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}
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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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return ret;
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}
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gboolean
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gst_rtp_dtmf_mux_plugin_init (GstPlugin * plugin)
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{
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GST_DEBUG_CATEGORY_INIT (gst_rtp_dtmf_mux_debug, "rtpdtmfmux", 0,
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"rtp dtmf muxer");
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return gst_element_register (plugin, "rtpdtmfmux", GST_RANK_NONE,
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GST_TYPE_RTP_DTMF_MUX);
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}
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