mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
synced 2024-12-27 10:40:34 +00:00
122 lines
3.8 KiB
C
122 lines
3.8 KiB
C
/*
|
|
* Siren Depayloader Gst Element
|
|
*
|
|
* @author: Youness Alaoui <kakaroto@kakaroto.homelinux.net>
|
|
*
|
|
* 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 details.
|
|
*
|
|
* You should have received a copy of the GNU Library General Public
|
|
* License along with this library; if not, write to the
|
|
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
|
|
* Boston, MA 02111-1307, USA.
|
|
*/
|
|
|
|
#ifdef HAVE_CONFIG_H
|
|
# include "config.h"
|
|
#endif
|
|
|
|
#include <string.h>
|
|
#include <stdlib.h>
|
|
#include <gst/rtp/gstrtpbuffer.h>
|
|
#include "gstrtpsirendepay.h"
|
|
|
|
static GstStaticPadTemplate gst_rtp_siren_depay_sink_template =
|
|
GST_STATIC_PAD_TEMPLATE ("sink",
|
|
GST_PAD_SINK,
|
|
GST_PAD_ALWAYS,
|
|
GST_STATIC_CAPS ("application/x-rtp, "
|
|
"media = (string) \"audio\", "
|
|
"payload = (int) " GST_RTP_PAYLOAD_DYNAMIC_STRING ", "
|
|
"clock-rate = (int) 16000, "
|
|
"encoding-name = (string) \"SIREN\", " "dct-length = (int) 320")
|
|
);
|
|
|
|
static GstStaticPadTemplate gst_rtp_siren_depay_src_template =
|
|
GST_STATIC_PAD_TEMPLATE ("src",
|
|
GST_PAD_SRC,
|
|
GST_PAD_ALWAYS,
|
|
GST_STATIC_CAPS ("audio/x-siren, " "dct-length = (int) 320")
|
|
);
|
|
|
|
static GstBuffer *gst_rtp_siren_depay_process (GstRTPBaseDepayload * depayload,
|
|
GstBuffer * buf);
|
|
static gboolean gst_rtp_siren_depay_setcaps (GstRTPBaseDepayload * depayload,
|
|
GstCaps * caps);
|
|
|
|
G_DEFINE_TYPE (GstRTPSirenDepay, gst_rtp_siren_depay,
|
|
GST_TYPE_RTP_BASE_DEPAYLOAD);
|
|
|
|
static void
|
|
gst_rtp_siren_depay_class_init (GstRTPSirenDepayClass * klass)
|
|
{
|
|
GstElementClass *gstelement_class;
|
|
GstRTPBaseDepayloadClass *gstrtpbasedepayload_class;
|
|
|
|
gstelement_class = (GstElementClass *) klass;
|
|
gstrtpbasedepayload_class = (GstRTPBaseDepayloadClass *) klass;
|
|
|
|
gstrtpbasedepayload_class->process = gst_rtp_siren_depay_process;
|
|
gstrtpbasedepayload_class->set_caps = gst_rtp_siren_depay_setcaps;
|
|
|
|
gst_element_class_add_pad_template (gstelement_class,
|
|
gst_static_pad_template_get (&gst_rtp_siren_depay_src_template));
|
|
gst_element_class_add_pad_template (gstelement_class,
|
|
gst_static_pad_template_get (&gst_rtp_siren_depay_sink_template));
|
|
gst_element_class_set_static_metadata (gstelement_class,
|
|
"RTP Siren packet depayloader", "Codec/Depayloader/Network/RTP",
|
|
"Extracts Siren audio from RTP packets",
|
|
"Philippe Kalaf <philippe.kalaf@collabora.co.uk>");
|
|
}
|
|
|
|
static void
|
|
gst_rtp_siren_depay_init (GstRTPSirenDepay * rtpsirendepay)
|
|
{
|
|
|
|
}
|
|
|
|
static gboolean
|
|
gst_rtp_siren_depay_setcaps (GstRTPBaseDepayload * depayload, GstCaps * caps)
|
|
{
|
|
GstCaps *srccaps;
|
|
gboolean ret;
|
|
|
|
srccaps = gst_caps_new_simple ("audio/x-siren",
|
|
"dct-length", G_TYPE_INT, 320, NULL);
|
|
ret = gst_pad_set_caps (GST_RTP_BASE_DEPAYLOAD_SRCPAD (depayload), srccaps);
|
|
|
|
GST_DEBUG ("set caps on source: %" GST_PTR_FORMAT " (ret=%d)", srccaps, ret);
|
|
gst_caps_unref (srccaps);
|
|
|
|
/* always fixed clock rate of 16000 */
|
|
depayload->clock_rate = 16000;
|
|
|
|
return ret;
|
|
}
|
|
|
|
static GstBuffer *
|
|
gst_rtp_siren_depay_process (GstRTPBaseDepayload * depayload, GstBuffer * buf)
|
|
{
|
|
GstBuffer *outbuf;
|
|
GstRTPBuffer rtp = { NULL };
|
|
|
|
gst_rtp_buffer_map (buf, GST_MAP_READ, &rtp);
|
|
outbuf = gst_rtp_buffer_get_payload_buffer (&rtp);
|
|
gst_rtp_buffer_unmap (&rtp);
|
|
|
|
return outbuf;
|
|
}
|
|
|
|
gboolean
|
|
gst_rtp_siren_depay_plugin_init (GstPlugin * plugin)
|
|
{
|
|
return gst_element_register (plugin, "rtpsirendepay",
|
|
GST_RANK_SECONDARY, GST_TYPE_RTP_SIREN_DEPAY);
|
|
}
|