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239 lines
6.8 KiB
C
239 lines
6.8 KiB
C
/* GStreamer
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* Copyright (C) <2006> Philippe Khalaf <burger@speedy.org>
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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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#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 <stdlib.h>
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#include <gst/rtp/gstrtpbuffer.h>
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#include "gstrtpilbcdepay.h"
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/* elementfactory information */
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static const GstElementDetails gst_rtp_ilbc_depay_details =
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GST_ELEMENT_DETAILS ("RTP iLBC depayloader",
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"Codec/Depayloader/Network",
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"Extracts iLBC audio from RTP packets (RFC 3952)",
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"Philippe Kalaf <philippe.kalaf@collabora.co.uk>");
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/* RtpiLBCDepay 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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#define DEFAULT_MODE GST_ILBC_MODE_30
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enum
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{
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PROP_0,
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PROP_MODE
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};
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/* FIXME, mode should be string because it is a parameter in SDP fmtp */
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static GstStaticPadTemplate gst_rtp_ilbc_depay_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) " GST_RTP_PAYLOAD_DYNAMIC_STRING ", "
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"clock-rate = (int) 8000, "
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"encoding-name = (string) \"ILBC\", "
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"mode = (string) { \"20\", \"30\" }")
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);
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static GstStaticPadTemplate gst_rtp_ilbc_depay_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-iLBC, " "mode = (int) { 20, 30 }")
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);
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static void gst_ilbc_depay_set_property (GObject * object,
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guint prop_id, const GValue * value, GParamSpec * pspec);
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static void gst_ilbc_depay_get_property (GObject * object,
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guint prop_id, GValue * value, GParamSpec * pspec);
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static GstBuffer *gst_rtp_ilbc_depay_process (GstBaseRTPDepayload * depayload,
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GstBuffer * buf);
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static gboolean gst_rtp_ilbc_depay_setcaps (GstBaseRTPDepayload * depayload,
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GstCaps * caps);
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GST_BOILERPLATE (GstRTPiLBCDepay, gst_rtp_ilbc_depay, GstBaseRTPDepayload,
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GST_TYPE_BASE_RTP_DEPAYLOAD);
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#define GST_TYPE_ILBC_MODE (gst_ilbc_mode_get_type())
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static GType
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gst_ilbc_mode_get_type (void)
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{
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static GType ilbc_mode_type = 0;
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static const GEnumValue ilbc_modes[] = {
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{GST_ILBC_MODE_20, "20ms frames", "20ms"},
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{GST_ILBC_MODE_30, "30ms frames", "30ms"},
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{0, NULL, NULL},
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};
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if (!ilbc_mode_type) {
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ilbc_mode_type = g_enum_register_static ("iLBCMode", ilbc_modes);
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}
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return ilbc_mode_type;
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}
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static void
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gst_rtp_ilbc_depay_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_rtp_ilbc_depay_src_template));
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gst_element_class_add_pad_template (element_class,
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gst_static_pad_template_get (&gst_rtp_ilbc_depay_sink_template));
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gst_element_class_set_details (element_class, &gst_rtp_ilbc_depay_details);
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}
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static void
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gst_rtp_ilbc_depay_class_init (GstRTPiLBCDepayClass * klass)
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{
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GObjectClass *gobject_class;
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GstBaseRTPDepayloadClass *gstbasertpdepayload_class;
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gobject_class = (GObjectClass *) klass;
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gstbasertpdepayload_class = (GstBaseRTPDepayloadClass *) klass;
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gobject_class->set_property = gst_ilbc_depay_set_property;
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gobject_class->get_property = gst_ilbc_depay_get_property;
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/* FIXME, mode is in the caps */
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g_object_class_install_property (gobject_class, PROP_MODE,
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g_param_spec_enum ("mode", "Mode", "iLBC frame mode",
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GST_TYPE_ILBC_MODE, DEFAULT_MODE, G_PARAM_READWRITE));
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gstbasertpdepayload_class->process = gst_rtp_ilbc_depay_process;
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gstbasertpdepayload_class->set_caps = gst_rtp_ilbc_depay_setcaps;
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}
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static void
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gst_rtp_ilbc_depay_init (GstRTPiLBCDepay * rtpilbcdepay,
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GstRTPiLBCDepayClass * klass)
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{
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/* Set default mode */
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rtpilbcdepay->mode = DEFAULT_MODE;
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}
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static gboolean
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gst_rtp_ilbc_depay_setcaps (GstBaseRTPDepayload * depayload, GstCaps * caps)
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{
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GstRTPiLBCDepay *rtpilbcdepay = GST_RTP_ILBC_DEPAY (depayload);
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GstCaps *srccaps;
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GstStructure *structure;
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const gchar *mode_str = NULL;
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gint mode, clock_rate;
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gboolean ret;
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structure = gst_caps_get_structure (caps, 0);
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mode = rtpilbcdepay->mode;
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if (!gst_structure_get_int (structure, "clock-rate", &clock_rate))
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clock_rate = 8000;
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depayload->clock_rate = clock_rate;
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/* parse mode, if we can */
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mode_str = gst_structure_get_string (structure, "mode");
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if (mode_str) {
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mode = strtol (mode_str, NULL, 10);
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if (mode != 20 && mode != 30)
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mode = rtpilbcdepay->mode;
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}
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rtpilbcdepay->mode = mode;
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srccaps = gst_caps_new_simple ("audio/x-iLBC",
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"mode", G_TYPE_INT, rtpilbcdepay->mode, NULL);
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ret = gst_pad_set_caps (GST_BASE_RTP_DEPAYLOAD_SRCPAD (depayload), srccaps);
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GST_DEBUG ("set caps on source: %" GST_PTR_FORMAT " (ret=%d)", srccaps, ret);
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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_rtp_ilbc_depay_process (GstBaseRTPDepayload * depayload, GstBuffer * buf)
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{
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GstBuffer *outbuf;
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gboolean marker;
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marker = gst_rtp_buffer_get_marker (buf);
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GST_DEBUG ("process : got %d bytes, mark %d ts %u seqn %d",
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GST_BUFFER_SIZE (buf), marker,
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gst_rtp_buffer_get_timestamp (buf), gst_rtp_buffer_get_seq (buf));
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outbuf = gst_rtp_buffer_get_payload_buffer (buf);
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if (marker) {
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/* mark start of talkspurt with DISCONT */
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GST_BUFFER_FLAG_SET (outbuf, GST_BUFFER_FLAG_DISCONT);
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}
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return outbuf;
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}
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static void
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gst_ilbc_depay_set_property (GObject * object,
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guint prop_id, const GValue * value, GParamSpec * pspec)
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{
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GstRTPiLBCDepay *rtpilbcdepay = GST_RTP_ILBC_DEPAY (object);
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switch (prop_id) {
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case PROP_MODE:
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rtpilbcdepay->mode = g_value_get_enum (value);
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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 void
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gst_ilbc_depay_get_property (GObject * object,
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guint prop_id, GValue * value, GParamSpec * pspec)
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{
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GstRTPiLBCDepay *rtpilbcdepay = GST_RTP_ILBC_DEPAY (object);
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switch (prop_id) {
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case PROP_MODE:
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g_value_set_enum (value, rtpilbcdepay->mode);
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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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gboolean
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gst_rtp_ilbc_depay_plugin_init (GstPlugin * plugin)
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{
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return gst_element_register (plugin, "rtpilbcdepay",
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GST_RANK_MARGINAL, GST_TYPE_RTP_ILBC_DEPAY);
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}
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