From 333468b5d448062b40c428e5c3b95dcb8159807c Mon Sep 17 00:00:00 2001 From: Zeeshan Ali Date: Sun, 13 Jul 2003 00:20:44 +0000 Subject: GSM -> RTP and viceversa Original commit message from CVS: GSM -> RTP and viceversa --- gst/rtp/gstrtpgsmparse.c | 295 +++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 295 insertions(+) create mode 100644 gst/rtp/gstrtpgsmparse.c (limited to 'gst/rtp/gstrtpgsmparse.c') diff --git a/gst/rtp/gstrtpgsmparse.c b/gst/rtp/gstrtpgsmparse.c new file mode 100644 index 00000000..814cc680 --- /dev/null +++ b/gst/rtp/gstrtpgsmparse.c @@ -0,0 +1,295 @@ +/* GStreamer + * Copyright (C) <1999> Erik Walthinsen + * + * This library is free software; you can redistribute it and/or + * modify it under the terms of the GNU Library General Public + * License as published by the Free Software Foundation; either + * version 2 of the License, or (at your option) any later version. + * + * This library is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Library General Public License for more + */ + +#include +#include "gstrtpgsmparse.h" +#include "gstrtp-common.h" + +/* elementfactory information */ +static GstElementDetails gst_rtp_L16parse_details = { + "RTP packet parser", + "RtpGSMParse", + "GPL", + "Extracts GSM audio from RTP packets", + VERSION, + "Zeeshan Ali ", + "(C) 2003", +}; + +/* RtpGSMParse signals and args */ +enum +{ + /* FILL ME */ + LAST_SIGNAL +}; + +enum +{ + ARG_0, + ARG_FREQUENCY +}; + +GST_PAD_TEMPLATE_FACTORY (src_factory, + "src", + GST_PAD_SRC, + GST_PAD_ALWAYS, + GST_CAPS_NEW ( + "gsm_gsm", + "audio/x-gsm", + "rate", GST_PROPS_INT_RANGE (1000, 48000)) +) + +GST_PAD_TEMPLATE_FACTORY (sink_factory, + "sink", + GST_PAD_SINK, + GST_PAD_ALWAYS, + GST_CAPS_NEW ( + "rtp", + "application/x-rtp", + NULL) +); + +static void gst_rtpgsmparse_class_init (GstRtpGSMParseClass * klass); +static void gst_rtpgsmparse_init (GstRtpGSMParse * rtpgsmparse); + +static void gst_rtpgsmparse_chain (GstPad * pad, GstBuffer * buf); + +static void gst_rtpgsmparse_set_property (GObject * object, guint prop_id, + const GValue * value, GParamSpec * pspec); +static void gst_rtpgsmparse_get_property (GObject * object, guint prop_id, + GValue * value, GParamSpec * pspec); +static GstElementStateReturn gst_rtpgsmparse_change_state (GstElement * element); + +static GstElementClass *parent_class = NULL; + +static GType gst_rtpgsmparse_get_type (void) +{ + static GType rtpgsmparse_type = 0; + + if (!rtpgsmparse_type) { + static const GTypeInfo rtpgsmparse_info = { + sizeof (GstRtpGSMParseClass), + NULL, + NULL, + (GClassInitFunc) gst_rtpgsmparse_class_init, + NULL, + NULL, + sizeof (GstRtpGSMParse), + 0, + (GInstanceInitFunc) gst_rtpgsmparse_init, + }; + + rtpgsmparse_type = g_type_register_static (GST_TYPE_ELEMENT, "GstRtpGSMParse", &rtpgsmparse_info, 0); + } + return rtpgsmparse_type; +} + +static void +gst_rtpgsmparse_class_init (GstRtpGSMParseClass * klass) +{ + GObjectClass *gobject_class; + GstElementClass *gstelement_class; + + gobject_class = (GObjectClass *) klass; + gstelement_class = (GstElementClass *) klass; + + parent_class = g_type_class_ref (GST_TYPE_ELEMENT); + + g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_FREQUENCY, + g_param_spec_int ("frequency", "frequency", "frequency", + G_MININT, G_MAXINT, 8000, G_PARAM_READWRITE)); + + gobject_class->set_property = gst_rtpgsmparse_set_property; + gobject_class->get_property = gst_rtpgsmparse_get_property; + + gstelement_class->change_state = gst_rtpgsmparse_change_state; +} + +static void +gst_rtpgsmparse_init (GstRtpGSMParse * rtpgsmparse) +{ + rtpgsmparse->srcpad = gst_pad_new_from_template (GST_PAD_TEMPLATE_GET (src_factory), "src"); + rtpgsmparse->sinkpad = gst_pad_new_from_template (GST_PAD_TEMPLATE_GET (sink_factory), "sink"); + gst_element_add_pad (GST_ELEMENT (rtpgsmparse), rtpgsmparse->srcpad); + gst_element_add_pad (GST_ELEMENT (rtpgsmparse), rtpgsmparse->sinkpad); + gst_pad_set_chain_function (rtpgsmparse->sinkpad, gst_rtpgsmparse_chain); + + rtpgsmparse->frequency = 8000; +} + +void +gst_rtpgsmparse_ntohs (GstBuffer *buf) +{ + gint16 *i, *len; + + /* FIXME: is this code correct or even sane at all? */ + i = (gint16 *) GST_BUFFER_DATA(buf); + len = i + GST_BUFFER_SIZE (buf) / sizeof (gint16 *); + + for (; ifrequency)); + + gst_pad_try_set_caps (rtpgsmparse->srcpad, caps); +} + +static void +gst_rtpgsmparse_chain (GstPad * pad, GstBuffer * buf) +{ + GstRtpGSMParse *rtpgsmparse; + GstBuffer *outbuf; + Rtp_Packet packet; + rtp_payload_t pt; + + g_return_if_fail (pad != NULL); + g_return_if_fail (GST_IS_PAD (pad)); + g_return_if_fail (buf != NULL); + + rtpgsmparse = GST_RTP_GSM_PARSE (GST_OBJECT_PARENT (pad)); + + g_return_if_fail (rtpgsmparse != NULL); + g_return_if_fail (GST_IS_RTP_GSM_PARSE (rtpgsmparse)); + + if (GST_IS_EVENT (buf)) { + GstEvent *event = GST_EVENT (buf); + gst_pad_event_default (pad, event); + + return; + } + + if (GST_PAD_CAPS (rtpgsmparse->srcpad) == NULL) { + gst_rtpgsm_caps_nego (rtpgsmparse); + } + + packet = rtp_packet_new_copy_data (GST_BUFFER_DATA (buf), GST_BUFFER_SIZE (buf)); + + pt = rtp_packet_get_payload_type (packet); + + if (pt != PAYLOAD_GSM) { + g_warning ("Unexpected paload type %u\n", pt); + rtp_packet_free (packet); + gst_buffer_unref (buf); + return; + } + + outbuf = gst_buffer_new (); + GST_BUFFER_SIZE (outbuf) = rtp_packet_get_payload_len (packet); + GST_BUFFER_DATA (outbuf) = g_malloc (GST_BUFFER_SIZE (outbuf)); + GST_BUFFER_TIMESTAMP (outbuf) = g_ntohl (rtp_packet_get_timestamp (packet)) * GST_SECOND; + + memcpy (GST_BUFFER_DATA (outbuf), rtp_packet_get_payload (packet), GST_BUFFER_SIZE (outbuf)); + + GST_DEBUG (0,"gst_rtpgsmparse_chain: pushing buffer of size %d", GST_BUFFER_SIZE(outbuf)); + +/* FIXME: According to RFC 1890, this is required, right? */ +#if G_BYTE_ORDER == G_LITTLE_ENDIAN + gst_rtpgsmparse_ntohs (outbuf); +#endif + + gst_pad_push (rtpgsmparse->srcpad, outbuf); + + rtp_packet_free (packet); + gst_buffer_unref (buf); +} + +static void +gst_rtpgsmparse_set_property (GObject * object, guint prop_id, const GValue * value, GParamSpec * pspec) +{ + GstRtpGSMParse *rtpgsmparse; + + /* it's not null if we got it, but it might not be ours */ + g_return_if_fail (GST_IS_RTP_GSM_PARSE (object)); + rtpgsmparse = GST_RTP_GSM_PARSE (object); + + switch (prop_id) { + case ARG_FREQUENCY: + rtpgsmparse->frequency = g_value_get_int (value); + break; + default: + break; + } +} + +static void +gst_rtpgsmparse_get_property (GObject * object, guint prop_id, GValue * value, GParamSpec * pspec) +{ + GstRtpGSMParse *rtpgsmparse; + + /* it's not null if we got it, but it might not be ours */ + g_return_if_fail (GST_IS_RTP_GSM_PARSE (object)); + rtpgsmparse = GST_RTP_GSM_PARSE (object); + + switch (prop_id) { + case ARG_FREQUENCY: + g_value_set_int (value, rtpgsmparse->frequency); + break; + default: + G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); + break; + } +} + +static GstElementStateReturn +gst_rtpgsmparse_change_state (GstElement * element) +{ + GstRtpGSMParse *rtpgsmparse; + + g_return_val_if_fail (GST_IS_RTP_GSM_PARSE (element), GST_STATE_FAILURE); + + rtpgsmparse = GST_RTP_GSM_PARSE (element); + + GST_DEBUG (0, "state pending %d\n", GST_STATE_PENDING (element)); + + switch (GST_STATE_TRANSITION (element)) { + case GST_STATE_NULL_TO_READY: + break; + case GST_STATE_READY_TO_NULL: + break; + default: + break; + } + + /* if we haven't failed already, give the parent class a chance to ;-) */ + if (GST_ELEMENT_CLASS (parent_class)->change_state) + return GST_ELEMENT_CLASS (parent_class)->change_state (element); + + return GST_STATE_SUCCESS; +} + +gboolean +gst_rtpgsmparse_plugin_init (GModule * module, GstPlugin * plugin) +{ + GstElementFactory *rtpgsmparse; + + rtpgsmparse = gst_element_factory_new ("rtpgsmparse", GST_TYPE_RTP_GSM_PARSE, &gst_rtp_L16parse_details); + g_return_val_if_fail (rtpgsmparse != NULL, FALSE); + + gst_element_factory_add_pad_template (rtpgsmparse, GST_PAD_TEMPLATE_GET (src_factory)); + gst_element_factory_add_pad_template (rtpgsmparse, GST_PAD_TEMPLATE_GET (sink_factory)); + + gst_plugin_add_feature (plugin, GST_PLUGIN_FEATURE (rtpgsmparse)); + + return TRUE; +} -- cgit