--- /dev/null
+/* GStreamer
+ * Copyright (C) <2005> Wim Taymans <wim@fluendo.com>
+ *
+ * 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
+ */
+
+#ifdef HAVE_CONFIG_H
+# include "config.h"
+#endif
+
+#include <string.h>
+
+#include <gst/rtp/gstrtpbuffer.h>
+
+#include "gstbasertppayload.h"
+
+/* BaseRTPPayload signals and args */
+enum
+{
+ /* FILL ME */
+ LAST_SIGNAL
+};
+
+#define DEFAULT_MTU 1024
+#define DEFAULT_PT 96
+#define DEFAULT_SSRC 0
+
+enum
+{
+ PROP_0,
+ PROP_MTU,
+ PROP_PT,
+ PROP_SSRC,
+ PROP_TIMESTAMP,
+ PROP_SEQNUM
+};
+
+static void gst_basertppayload_class_init (GstBaseRTPPayloadClass * klass);
+static void gst_basertppayload_base_init (GstBaseRTPPayloadClass * klass);
+static void gst_basertppayload_init (GstBaseRTPPayload * basertppayload,
+ gpointer g_class);
+static void gst_basertppayload_finalize (GObject * object);
+
+static gboolean gst_basertppayload_setcaps (GstPad * pad, GstCaps * caps);
+static GstFlowReturn gst_basertppayload_chain (GstPad * pad,
+ GstBuffer * buffer);
+
+static void gst_basertppayload_set_property (GObject * object, guint prop_id,
+ const GValue * value, GParamSpec * pspec);
+static void gst_basertppayload_get_property (GObject * object, guint prop_id,
+ GValue * value, GParamSpec * pspec);
+
+static GstStateChangeReturn gst_basertppayload_change_state (GstElement *
+ element, GstStateChange transition);
+
+static GstElementClass *parent_class = NULL;
+
+GType
+gst_basertppayload_get_type (void)
+{
+ static GType basertppayload_type = 0;
+
+ if (!basertppayload_type) {
+ static const GTypeInfo basertppayload_info = {
+ sizeof (GstBaseRTPPayloadClass),
+ (GBaseInitFunc) gst_basertppayload_base_init,
+ NULL,
+ (GClassInitFunc) gst_basertppayload_class_init,
+ NULL,
+ NULL,
+ sizeof (GstBaseRTPPayload),
+ 0,
+ (GInstanceInitFunc) gst_basertppayload_init,
+ };
+
+ basertppayload_type =
+ g_type_register_static (GST_TYPE_ELEMENT, "GstBaseRTPPayload",
+ &basertppayload_info, G_TYPE_FLAG_ABSTRACT);
+ }
+ return basertppayload_type;
+}
+
+static void
+gst_basertppayload_base_init (GstBaseRTPPayloadClass * klass)
+{
+}
+
+static void
+gst_basertppayload_class_init (GstBaseRTPPayloadClass * klass)
+{
+ GObjectClass *gobject_class;
+ GstElementClass *gstelement_class;
+
+ gobject_class = (GObjectClass *) klass;
+ gstelement_class = (GstElementClass *) klass;
+
+ parent_class = g_type_class_ref (GST_TYPE_ELEMENT);
+
+ gobject_class->finalize = gst_basertppayload_finalize;
+
+ gobject_class->set_property = gst_basertppayload_set_property;
+ gobject_class->get_property = gst_basertppayload_get_property;
+
+ g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_MTU,
+ g_param_spec_uint ("mtu", "MTU",
+ "Maximum size of one packet",
+ 28, G_MAXUINT, DEFAULT_MTU, G_PARAM_READWRITE));
+ g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_PT,
+ g_param_spec_uint ("pt", "payload type",
+ "The payload type of the packets",
+ 0, 0x80, DEFAULT_PT, G_PARAM_READWRITE));
+ g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_SSRC,
+ g_param_spec_uint ("ssrc", "SSRC",
+ "The SSRC of the packets (0 == random)",
+ 0, G_MAXUINT, DEFAULT_SSRC, G_PARAM_READWRITE));
+ g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_TIMESTAMP,
+ g_param_spec_uint ("timestamp", "Timestamp",
+ "The RTP timestamp of the last processed packet",
+ 0, G_MAXUINT, 0, G_PARAM_READABLE));
+ g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_SEQNUM,
+ g_param_spec_uint ("seqnum", "Sequence number",
+ "The RTP sequence number of the last processed packet",
+ 0, G_MAXUINT, 0, G_PARAM_READABLE));
+
+ gstelement_class->change_state = gst_basertppayload_change_state;
+}
+
+static void
+gst_basertppayload_init (GstBaseRTPPayload * basertppayload, gpointer g_class)
+{
+ GstPadTemplate *templ;
+
+ templ =
+ gst_element_class_get_pad_template (GST_ELEMENT_CLASS (g_class), "src");
+ g_return_if_fail (templ != NULL);
+
+ basertppayload->srcpad = gst_pad_new_from_template (templ, "src");
+ gst_element_add_pad (GST_ELEMENT (basertppayload), basertppayload->srcpad);
+
+ templ =
+ gst_element_class_get_pad_template (GST_ELEMENT_CLASS (g_class), "sink");
+ g_return_if_fail (templ != NULL);
+
+ basertppayload->sinkpad = gst_pad_new_from_template (templ, "sink");
+ gst_pad_set_setcaps_function (basertppayload->sinkpad,
+ gst_basertppayload_setcaps);
+ gst_pad_set_chain_function (basertppayload->sinkpad,
+ gst_basertppayload_chain);
+ gst_element_add_pad (GST_ELEMENT (basertppayload), basertppayload->sinkpad);
+
+ basertppayload->seq_rand = g_rand_new ();
+ basertppayload->ssrc_rand = g_rand_new ();
+ basertppayload->ts_rand = g_rand_new ();
+
+ basertppayload->mtu = DEFAULT_MTU;
+ basertppayload->pt = DEFAULT_PT;
+ basertppayload->seqnum =
+ g_rand_int_range (basertppayload->seq_rand, 0, G_MAXUINT16);
+ basertppayload->ssrc = DEFAULT_SSRC;
+ basertppayload->ts_base = g_rand_int (basertppayload->ts_rand);
+
+ basertppayload->clock_rate = 0;
+}
+
+static void
+gst_basertppayload_finalize (GObject * object)
+{
+ GstBaseRTPPayload *basertppayload;
+
+ basertppayload = GST_BASE_RTP_PAYLOAD (object);
+
+ g_rand_free (basertppayload->seq_rand);
+ basertppayload->seq_rand = NULL;
+ g_rand_free (basertppayload->ssrc_rand);
+ basertppayload->ssrc_rand = NULL;
+ g_rand_free (basertppayload->ts_rand);
+ basertppayload->ts_rand = NULL;
+
+ G_OBJECT_CLASS (parent_class)->finalize (object);
+}
+
+static gboolean
+gst_basertppayload_setcaps (GstPad * pad, GstCaps * caps)
+{
+ GstBaseRTPPayload *basertppayload;
+ GstBaseRTPPayloadClass *basertppayload_class;
+ gboolean ret = TRUE;
+
+ basertppayload = GST_BASE_RTP_PAYLOAD (gst_pad_get_parent (pad));
+ basertppayload_class = GST_BASE_RTP_PAYLOAD_GET_CLASS (basertppayload);
+
+ if (basertppayload_class->set_caps)
+ ret = basertppayload_class->set_caps (basertppayload, caps);
+
+ gst_object_unref (basertppayload);
+
+ return ret;
+}
+
+static GstFlowReturn
+gst_basertppayload_chain (GstPad * pad, GstBuffer * buffer)
+{
+ GstBaseRTPPayload *basertppayload;
+ GstBaseRTPPayloadClass *basertppayload_class;
+ GstFlowReturn ret;
+
+ basertppayload = GST_BASE_RTP_PAYLOAD (gst_pad_get_parent (pad));
+ basertppayload_class = GST_BASE_RTP_PAYLOAD_GET_CLASS (basertppayload);
+
+ if (!basertppayload_class->handle_buffer)
+ goto no_function;
+
+ ret = basertppayload_class->handle_buffer (basertppayload, buffer);
+
+ gst_object_unref (basertppayload);
+
+ return ret;
+
+ /* ERRORS */
+no_function:
+ {
+ GST_DEBUG ("subclass did not implement handle_buffer function");
+ gst_object_unref (basertppayload);
+ return GST_FLOW_ERROR;
+ }
+}
+
+void
+gst_basertppayload_set_options (GstBaseRTPPayload * payload,
+ gchar * media, gboolean dynamic, gchar * encoding_name, guint32 clock_rate)
+{
+ g_return_if_fail (payload != NULL);
+ g_return_if_fail (clock_rate != 0);
+
+ g_free (payload->media);
+ payload->media = g_strdup (media);
+ payload->dynamic = dynamic;
+ g_free (payload->encoding_name);
+ payload->encoding_name = g_strdup (encoding_name);
+ payload->clock_rate = clock_rate;
+}
+
+gboolean
+gst_basertppayload_set_outcaps (GstBaseRTPPayload * payload, gchar * fieldname,
+ ...)
+{
+ GstCaps *srccaps;
+ GstStructure *s;
+
+ srccaps = gst_caps_new_simple ("application/x-rtp",
+ "media", G_TYPE_STRING, payload->media,
+ "payload", G_TYPE_INT, GST_BASE_RTP_PAYLOAD_PT (payload),
+ "clock_rate", G_TYPE_INT, payload->clock_rate,
+ "encoding_name", G_TYPE_STRING, payload->encoding_name,
+ "ssrc", G_TYPE_UINT, payload->current_ssrc,
+ "clock_base", G_TYPE_UINT, payload->ts_base,
+ "seqnum_base", G_TYPE_UINT, payload->seqnum_base, NULL);
+ s = gst_caps_get_structure (srccaps, 0);
+
+ if (fieldname) {
+ va_list varargs;
+
+ va_start (varargs, fieldname);
+ gst_structure_set_valist (s, fieldname, varargs);
+ va_end (varargs);
+ }
+
+ gst_pad_set_caps (GST_BASE_RTP_PAYLOAD_SRCPAD (payload), srccaps);
+ gst_caps_unref (srccaps);
+
+ return TRUE;
+}
+
+GstFlowReturn
+gst_basertppayload_push (GstBaseRTPPayload * payload, GstBuffer * buffer)
+{
+ GstFlowReturn res;
+ GstClockTime timestamp;
+ guint32 ts;
+
+ if (payload->clock_rate == 0)
+ goto no_rate;
+
+ gst_rtpbuffer_set_ssrc (buffer, payload->ssrc);
+
+ gst_rtpbuffer_set_payload_type (buffer, payload->pt);
+
+ /* can warp around, which is perfectly fine */
+ gst_rtpbuffer_set_seq (buffer, payload->seqnum++);
+
+ /* add our random offset to the timestamp */
+ ts = payload->ts_base;
+
+ timestamp = GST_BUFFER_TIMESTAMP (buffer);
+ if (GST_CLOCK_TIME_IS_VALID (timestamp))
+ ts += timestamp * payload->clock_rate / GST_SECOND;
+ gst_rtpbuffer_set_timestamp (buffer, ts);
+
+ payload->timestamp = ts;
+
+ /* set caps */
+ gst_buffer_set_caps (buffer, GST_PAD_CAPS (payload->srcpad));
+
+ res = gst_pad_push (payload->srcpad, buffer);
+
+ return res;
+
+ /* ERRORS */
+no_rate:
+ {
+ GST_DEBUG ("subclass did not specify clock_rate");
+ gst_buffer_unref (buffer);
+ return GST_FLOW_ERROR;
+ }
+}
+
+static void
+gst_basertppayload_set_property (GObject * object, guint prop_id,
+ const GValue * value, GParamSpec * pspec)
+{
+ GstBaseRTPPayload *basertppayload;
+
+ basertppayload = GST_BASE_RTP_PAYLOAD (object);
+
+ switch (prop_id) {
+ case PROP_MTU:
+ basertppayload->mtu = g_value_get_uint (value);
+ break;
+ case PROP_PT:
+ basertppayload->pt = g_value_get_uint (value);
+ break;
+ case PROP_SSRC:
+ basertppayload->ssrc = g_value_get_uint (value);
+ break;
+ default:
+ G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+ break;
+ }
+}
+
+static void
+gst_basertppayload_get_property (GObject * object, guint prop_id,
+ GValue * value, GParamSpec * pspec)
+{
+ GstBaseRTPPayload *basertppayload;
+
+ basertppayload = GST_BASE_RTP_PAYLOAD (object);
+
+ switch (prop_id) {
+ case PROP_MTU:
+ g_value_set_uint (value, basertppayload->mtu);
+ break;
+ case PROP_PT:
+ g_value_set_uint (value, basertppayload->pt);
+ break;
+ case PROP_SSRC:
+ g_value_set_uint (value, basertppayload->ssrc);
+ break;
+ case PROP_TIMESTAMP:
+ g_value_set_uint (value, basertppayload->timestamp);
+ break;
+ case PROP_SEQNUM:
+ g_value_set_uint (value, basertppayload->seqnum);
+ break;
+ default:
+ G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+ break;
+ }
+}
+
+static GstStateChangeReturn
+gst_basertppayload_change_state (GstElement * element,
+ GstStateChange transition)
+{
+ GstBaseRTPPayload *basertppayload;
+ GstStateChangeReturn ret;
+
+ basertppayload = GST_BASE_RTP_PAYLOAD (element);
+
+ switch (transition) {
+ case GST_STATE_CHANGE_NULL_TO_READY:
+ break;
+ case GST_STATE_CHANGE_READY_TO_PAUSED:
+ basertppayload->seqnum_base =
+ g_rand_int_range (basertppayload->seq_rand, 0, G_MAXUINT16);
+ basertppayload->seqnum = basertppayload->seqnum_base;
+ if (basertppayload->ssrc == 0)
+ basertppayload->current_ssrc = g_rand_int (basertppayload->ssrc_rand);
+ else
+ basertppayload->current_ssrc = basertppayload->ssrc;
+ basertppayload->ts_base = g_rand_int (basertppayload->ts_rand);
+ break;
+ default:
+ break;
+ }
+
+ ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
+
+ switch (transition) {
+ case GST_STATE_CHANGE_READY_TO_NULL:
+ break;
+ default:
+ break;
+ }
+ return ret;
+}
--- /dev/null
+/* GStreamer
+ * Copyright (C) <2005> Wim Taymans <wim@fluendo.com>
+ *
+ * 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.
+ */
+
+#ifndef __GST_BASE_RTP_PAYLOAD_H__
+#define __GST_BASE_RTP_PAYLOAD_H__
+
+#include <gst/gst.h>
+
+G_BEGIN_DECLS
+
+#define GST_TYPE_BASE_RTP_PAYLOAD \
+ (gst_basertppayload_get_type())
+#define GST_BASE_RTP_PAYLOAD(obj) \
+ (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_BASE_RTP_PAYLOAD,GstBaseRTPPayload))
+#define GST_BASE_RTP_PAYLOAD_CLASS(klass) \
+ (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_BASE_RTP_PAYLOAD,GstBaseRTPPayload))
+#define GST_BASE_RTP_PAYLOAD_GET_CLASS(obj) \
+ (G_TYPE_INSTANCE_GET_CLASS ((obj), GST_TYPE_BASE_RTP_PAYLOAD, GstBaseRTPPayloadClass))
+#define GST_IS_BASE_RTP_PAYLOAD(obj) \
+ (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_BASE_RTP_PAYLOAD))
+#define GST_IS_BASE_RTP_PAYLOAD_CLASS(obj) \
+ (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_BASE_RTP_PAYLOAD))
+
+typedef struct _GstBaseRTPPayload GstBaseRTPPayload;
+typedef struct _GstBaseRTPPayloadClass GstBaseRTPPayloadClass;
+
+#define GST_BASE_RTP_PAYLOAD_SINKPAD(payload) (GST_BASE_RTP_PAYLOAD (payload)->sinkpad)
+#define GST_BASE_RTP_PAYLOAD_SRCPAD(payload) (GST_BASE_RTP_PAYLOAD (payload)->srcpad)
+#define GST_BASE_RTP_PAYLOAD_SINKPAD(payload) (GST_BASE_RTP_PAYLOAD (payload)->sinkpad)
+
+#define GST_BASE_RTP_PAYLOAD_PT(payload) (GST_BASE_RTP_PAYLOAD (payload)->pt)
+#define GST_BASE_RTP_PAYLOAD_MTU(payload) (GST_BASE_RTP_PAYLOAD (payload)->mtu)
+
+struct _GstBaseRTPPayload
+{
+ GstElement element;
+
+ GstPad *sinkpad;
+ GstPad *srcpad;
+
+ GRand *seq_rand;
+ GRand *ssrc_rand;
+ GRand *ts_rand;
+
+ guint32 ts_base;
+ guint16 seqnum_base;
+
+ gchar *media;
+ gchar *encoding_name;
+ gboolean dynamic;
+ guint32 clock_rate;
+
+ guint32 timestamp;
+ guint16 seqnum;
+ guint pt;
+ guint ssrc;
+ guint current_ssrc;
+ guint mtu;
+};
+
+struct _GstBaseRTPPayloadClass
+{
+ GstElementClass parent_class;
+
+ /* receive caps on the sink pad, configure the payloader. */
+ gboolean (*set_caps) (GstBaseRTPPayload *payload, GstCaps *caps);
+ /* handle a buffer, perform 0 or more gst_basertppayload_push() on
+ * the RTP buffers */
+ GstFlowReturn (*handle_buffer) (GstBaseRTPPayload *payload,
+ GstBuffer *buffer);
+};
+
+GType gst_basertppayload_get_type (void);
+
+void gst_basertppayload_set_options (GstBaseRTPPayload *payload,
+ gchar *media, gboolean dynamic,
+ gchar *encoding_name,
+ guint32 clock_rate);
+
+gboolean gst_basertppayload_set_outcaps (GstBaseRTPPayload *payload,
+ gchar *fieldname, ...);
+
+GstFlowReturn gst_basertppayload_push (GstBaseRTPPayload *payload,
+ GstBuffer *buffer);
+
+G_END_DECLS
+
+#endif /* __GST_BASE_RTP_PAYLOAD_H__ */
projects / platform / upstream / gst-plugins-base.git / commitdiff