--- /dev/null
+/* GStreamer
+ * Copyright (C) 2020 Collabora Ltd.
+ * Author: Guillaume Desmottes <guillaume.desmottes@collabora.com>, Collabora Ltd.
+ *
+ * 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., 51 Franklin St, Fifth Floor,
+ * Boston, MA 02110-1301, USA.
+ */
+
+/**
+ * SECTION:element-isacdepay
+ * @title: isacdepay
+ * @short_description: iSAC RTP Depayloader
+ *
+ * Since: 1.20
+ *
+ */
+
+#ifdef HAVE_CONFIG_H
+# include "config.h"
+#endif
+
+#include <stdlib.h>
+#include <string.h>
+#include <gst/rtp/gstrtpbuffer.h>
+#include <gst/audio/audio.h>
+
+#include "gstrtpisacdepay.h"
+#include "gstrtputils.h"
+
+GST_DEBUG_CATEGORY_STATIC (rtpisacdepay_debug);
+#define GST_CAT_DEFAULT (rtpisacdepay_debug)
+
+static GstStaticPadTemplate gst_rtp_isac_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, 32000 }, "
+ "encoding-name = (string) \"ISAC\"")
+ );
+
+static GstStaticPadTemplate gst_rtp_isac_depay_src_template =
+GST_STATIC_PAD_TEMPLATE ("src",
+ GST_PAD_SRC,
+ GST_PAD_ALWAYS,
+ GST_STATIC_CAPS ("audio/isac, "
+ "rate = (int) { 16000, 32000 }, " "channels = (int) 1")
+ );
+
+struct _GstRtpIsacDepay
+{
+ /*< private > */
+ GstRTPBaseDepayload parent;
+
+ guint64 packet;
+};
+
+#define gst_rtp_isac_depay_parent_class parent_class
+G_DEFINE_TYPE (GstRtpIsacDepay, gst_rtp_isac_depay,
+ GST_TYPE_RTP_BASE_DEPAYLOAD);
+
+static gboolean
+gst_rtp_isac_depay_setcaps (GstRTPBaseDepayload * depayload, GstCaps * caps)
+{
+ GstCaps *src_caps;
+ GstStructure *s;
+ gint rate;
+ gboolean ret;
+
+ GST_DEBUG_OBJECT (depayload, "sink caps: %" GST_PTR_FORMAT, caps);
+
+ s = gst_caps_get_structure (caps, 0);
+ if (!gst_structure_get_int (s, "clock-rate", &rate)) {
+ GST_ERROR_OBJECT (depayload, "Missing 'clock-rate' in caps");
+ return FALSE;
+ }
+
+ src_caps = gst_caps_new_simple ("audio/isac",
+ "channels", G_TYPE_INT, 1, "rate", G_TYPE_INT, rate, NULL);
+
+ ret = gst_pad_set_caps (GST_RTP_BASE_DEPAYLOAD_SRCPAD (depayload), src_caps);
+
+ GST_DEBUG_OBJECT (depayload,
+ "set caps on source: %" GST_PTR_FORMAT " (ret=%d)", src_caps, ret);
+ gst_caps_unref (src_caps);
+
+ return ret;
+}
+
+static GstBuffer *
+gst_rtp_isac_depay_process (GstRTPBaseDepayload * depayload,
+ GstRTPBuffer * rtp_buffer)
+{
+ GstBuffer *outbuf;
+
+ outbuf = gst_rtp_buffer_get_payload_buffer (rtp_buffer);
+
+ gst_rtp_drop_non_audio_meta (depayload, outbuf);
+
+ return outbuf;
+}
+
+static void
+gst_rtp_isac_depay_class_init (GstRtpIsacDepayClass * klass)
+{
+ GstElementClass *gstelement_class = (GstElementClass *) klass;
+ GstRTPBaseDepayloadClass *depayload_class =
+ (GstRTPBaseDepayloadClass *) klass;
+
+ depayload_class->set_caps = gst_rtp_isac_depay_setcaps;
+ depayload_class->process_rtp_packet = gst_rtp_isac_depay_process;
+
+ gst_element_class_add_static_pad_template (gstelement_class,
+ &gst_rtp_isac_depay_sink_template);
+ gst_element_class_add_static_pad_template (gstelement_class,
+ &gst_rtp_isac_depay_src_template);
+
+ gst_element_class_set_static_metadata (gstelement_class,
+ "RTP iSAC depayloader", "Codec/Depayloader/Network/RTP",
+ "Extracts iSAC audio from RTP packets",
+ "Guillaume Desmottes <guillaume.desmottes@collabora.com>");
+
+ GST_DEBUG_CATEGORY_INIT (rtpisacdepay_debug, "rtpisacdepay", 0,
+ "iSAC RTP Depayloader");
+}
+
+static void
+gst_rtp_isac_depay_init (GstRtpIsacDepay * rtpisacdepay)
+{
+}
+
+gboolean
+gst_rtp_isac_depay_plugin_init (GstPlugin * plugin)
+{
+ return gst_element_register (plugin, "rtpisacdepay",
+ GST_RANK_SECONDARY, GST_TYPE_RTP_ISAC_DEPAY);
+}
--- /dev/null
+/* GStreamer
+ * Copyright (C) 2020 Collabora Ltd.
+ * Author: Guillaume Desmottes <guillaume.desmottes@collabora.com>, Collabora Ltd.
+ *
+ * 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
+ */
+
+
+#ifndef __GST_RTP_ISAC_DEPAY_H__
+#define __GST_RTP_ISAC_DEPAY_H__
+
+#include <gst/gst.h>
+#include <gst/rtp/gstrtpbasedepayload.h>
+
+G_BEGIN_DECLS
+
+#define GST_TYPE_RTP_ISAC_DEPAY gst_rtp_isac_depay_get_type ()
+
+G_DECLARE_FINAL_TYPE (GstRtpIsacDepay, gst_rtp_isac_depay, GST, RTP_ISAC_DEPAY,
+ GstRTPBaseDepayload);
+
+gboolean gst_rtp_isac_depay_plugin_init (GstPlugin * plugin);
+
+G_END_DECLS
+#endif /* __GST_RTP_ISAC_DEPAY_H__ */