--- /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-isacpay
+ * @title: isacpay
+ * @short_description: iSAC RTP Payloader
+ *
+ * Since: 1.20
+ *
+ */
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include <gst/rtp/gstrtpbuffer.h>
+
+#include "gstrtpisacpay.h"
+#include "gstrtputils.h"
+
+GST_DEBUG_CATEGORY_STATIC (rtpisacpay_debug);
+#define GST_CAT_DEFAULT (rtpisacpay_debug)
+
+static GstStaticPadTemplate gst_rtp_isac_pay_sink_template =
+GST_STATIC_PAD_TEMPLATE ("sink",
+ GST_PAD_SINK,
+ GST_PAD_ALWAYS,
+ GST_STATIC_CAPS ("audio/isac, "
+ "rate = (int) { 16000, 32000 }, " "channels = (int) 1")
+ );
+
+static GstStaticPadTemplate gst_rtp_isac_pay_src_template =
+GST_STATIC_PAD_TEMPLATE ("src",
+ GST_PAD_SRC,
+ 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\", "
+ "encoding-params = (string) \"1\"")
+ );
+
+struct _GstRtpIsacPay
+{
+ /*< private > */
+ GstRTPBasePayload parent;
+};
+
+#define gst_rtp_isac_pay_parent_class parent_class
+G_DEFINE_TYPE (GstRtpIsacPay, gst_rtp_isac_pay, GST_TYPE_RTP_BASE_PAYLOAD);
+
+static GstCaps *
+gst_rtp_isac_pay_getcaps (GstRTPBasePayload * payload, GstPad * pad,
+ GstCaps * filter)
+{
+ GstCaps *otherpadcaps;
+ GstCaps *caps;
+
+ otherpadcaps = gst_pad_get_allowed_caps (payload->srcpad);
+ caps = gst_pad_get_pad_template_caps (pad);
+
+ if (otherpadcaps) {
+ if (!gst_caps_is_empty (otherpadcaps)) {
+ GstStructure *ps;
+ GstStructure *s;
+ const GValue *v;
+
+ ps = gst_caps_get_structure (otherpadcaps, 0);
+ caps = gst_caps_make_writable (caps);
+ s = gst_caps_get_structure (caps, 0);
+
+ v = gst_structure_get_value (ps, "clock-rate");
+ if (v)
+ gst_structure_set_value (s, "rate", v);
+ }
+ gst_caps_unref (otherpadcaps);
+ }
+
+ if (filter) {
+ GstCaps *tcaps = caps;
+
+ caps = gst_caps_intersect_full (filter, tcaps, GST_CAPS_INTERSECT_FIRST);
+ gst_caps_unref (tcaps);
+ }
+
+ GST_DEBUG_OBJECT (payload, "%" GST_PTR_FORMAT, caps);
+
+ return caps;
+}
+
+static gboolean
+gst_rtp_isac_pay_setcaps (GstRTPBasePayload * payload, GstCaps * caps)
+{
+ GstStructure *s;
+ gint rate;
+
+ GST_DEBUG_OBJECT (payload, "%" GST_PTR_FORMAT, caps);
+
+ s = gst_caps_get_structure (caps, 0);
+ if (!gst_structure_get_int (s, "rate", &rate)) {
+ GST_ERROR_OBJECT (payload, "Missing 'rate' in caps");
+ return FALSE;
+ }
+
+ gst_rtp_base_payload_set_options (payload, "audio", TRUE, "ISAC", rate);
+
+ return gst_rtp_base_payload_set_outcaps (payload, NULL);
+}
+
+static GstFlowReturn
+gst_rtp_isac_pay_handle_buffer (GstRTPBasePayload * basepayload,
+ GstBuffer * buffer)
+{
+ GstBuffer *outbuf;
+ GstClockTime pts, dts, duration;
+
+ pts = GST_BUFFER_PTS (buffer);
+ dts = GST_BUFFER_DTS (buffer);
+ duration = GST_BUFFER_DURATION (buffer);
+
+ outbuf = gst_rtp_base_payload_allocate_output_buffer (basepayload, 0, 0, 0);
+
+ gst_rtp_copy_audio_meta (basepayload, outbuf, buffer);
+
+ outbuf = gst_buffer_append (outbuf, buffer);
+
+ GST_BUFFER_PTS (outbuf) = pts;
+ GST_BUFFER_DTS (outbuf) = dts;
+ GST_BUFFER_DURATION (outbuf) = duration;
+
+ return gst_rtp_base_payload_push (basepayload, outbuf);
+}
+
+static void
+gst_rtp_isac_pay_class_init (GstRtpIsacPayClass * klass)
+{
+ GstElementClass *gstelement_class = (GstElementClass *) klass;
+ GstRTPBasePayloadClass *payload_class = (GstRTPBasePayloadClass *) klass;
+
+ payload_class->get_caps = gst_rtp_isac_pay_getcaps;
+ payload_class->set_caps = gst_rtp_isac_pay_setcaps;
+ payload_class->handle_buffer = gst_rtp_isac_pay_handle_buffer;
+
+ gst_element_class_add_static_pad_template (gstelement_class,
+ &gst_rtp_isac_pay_sink_template);
+ gst_element_class_add_static_pad_template (gstelement_class,
+ &gst_rtp_isac_pay_src_template);
+
+ gst_element_class_set_static_metadata (gstelement_class,
+ "RTP iSAC payloader", "Codec/Payloader/Network/RTP",
+ "Payload-encodes iSAC audio into a RTP packet",
+ "Guillaume Desmottes <guillaume.desmottes@collabora.com>");
+
+ GST_DEBUG_CATEGORY_INIT (rtpisacpay_debug, "rtpisacpay", 0,
+ "iSAC RTP Payloader");
+}
+
+static void
+gst_rtp_isac_pay_init (GstRtpIsacPay * rtpisacpay)
+{
+}
+
+gboolean
+gst_rtp_isac_pay_plugin_init (GstPlugin * plugin)
+{
+ return gst_element_register (plugin, "rtpisacpay",
+ GST_RANK_SECONDARY, GST_TYPE_RTP_ISAC_PAY);
+}