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-rw-r--r--gst/rtp/gstrtph263penc.c303
1 files changed, 303 insertions, 0 deletions
diff --git a/gst/rtp/gstrtph263penc.c b/gst/rtp/gstrtph263penc.c
new file mode 100644
index 00000000..14c28c03
--- /dev/null
+++ b/gst/rtp/gstrtph263penc.c
@@ -0,0 +1,303 @@
+/* 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 "gstrtph263penc.h"
+
+/* elementfactory information */
+static GstElementDetails gst_rtp_h263penc_details = {
+ "RTP packet parser",
+ "Codec/Parser/Network",
+ "Extracts H263+ video from RTP packets",
+ "Wim Taymans <wim@fluendo.com>"
+};
+
+/* RtpH263PEnc signals and args */
+enum
+{
+ /* FILL ME */
+ LAST_SIGNAL
+};
+
+#define DEFAULT_MTU 1024
+
+enum
+{
+ PROP_0,
+ PROP_MTU
+};
+
+static GstStaticPadTemplate gst_rtph263penc_sink_template =
+GST_STATIC_PAD_TEMPLATE ("sink",
+ GST_PAD_SINK,
+ GST_PAD_ALWAYS,
+ GST_STATIC_CAPS ("video/x-h263")
+ );
+
+static GstStaticPadTemplate gst_rtph263penc_src_template =
+GST_STATIC_PAD_TEMPLATE ("src",
+ GST_PAD_SRC,
+ GST_PAD_ALWAYS,
+ GST_STATIC_CAPS ("application/x-rtp")
+ );
+
+
+static void gst_rtph263penc_class_init (GstRtpH263PEncClass * klass);
+static void gst_rtph263penc_base_init (GstRtpH263PEncClass * klass);
+static void gst_rtph263penc_init (GstRtpH263PEnc * rtph263penc);
+
+static GstFlowReturn gst_rtph263penc_chain (GstPad * pad, GstBuffer * buffer);
+
+static void gst_rtph263penc_set_property (GObject * object, guint prop_id,
+ const GValue * value, GParamSpec * pspec);
+static void gst_rtph263penc_get_property (GObject * object, guint prop_id,
+ GValue * value, GParamSpec * pspec);
+
+static GstElementStateReturn gst_rtph263penc_change_state (GstElement *
+ element);
+
+static GstElementClass *parent_class = NULL;
+
+static GType
+gst_rtph263penc_get_type (void)
+{
+ static GType rtph263penc_type = 0;
+
+ if (!rtph263penc_type) {
+ static const GTypeInfo rtph263penc_info = {
+ sizeof (GstRtpH263PEncClass),
+ (GBaseInitFunc) gst_rtph263penc_base_init,
+ NULL,
+ (GClassInitFunc) gst_rtph263penc_class_init,
+ NULL,
+ NULL,
+ sizeof (GstRtpH263PEnc),
+ 0,
+ (GInstanceInitFunc) gst_rtph263penc_init,
+ };
+
+ rtph263penc_type =
+ g_type_register_static (GST_TYPE_ELEMENT, "GstRtpH263PEnc",
+ &rtph263penc_info, 0);
+ }
+ return rtph263penc_type;
+}
+
+static void
+gst_rtph263penc_base_init (GstRtpH263PEncClass * klass)
+{
+ GstElementClass *element_class = GST_ELEMENT_CLASS (klass);
+
+ gst_element_class_add_pad_template (element_class,
+ gst_static_pad_template_get (&gst_rtph263penc_src_template));
+ gst_element_class_add_pad_template (element_class,
+ gst_static_pad_template_get (&gst_rtph263penc_sink_template));
+
+ gst_element_class_set_details (element_class, &gst_rtp_h263penc_details);
+}
+
+static void
+gst_rtph263penc_class_init (GstRtpH263PEncClass * 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->set_property = gst_rtph263penc_set_property;
+ gobject_class->get_property = gst_rtph263penc_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));
+
+ gstelement_class->change_state = gst_rtph263penc_change_state;
+}
+
+static void
+gst_rtph263penc_init (GstRtpH263PEnc * rtph263penc)
+{
+ rtph263penc->srcpad =
+ gst_pad_new_from_template (gst_static_pad_template_get
+ (&gst_rtph263penc_src_template), "src");
+ gst_element_add_pad (GST_ELEMENT (rtph263penc), rtph263penc->srcpad);
+
+ rtph263penc->sinkpad =
+ gst_pad_new_from_template (gst_static_pad_template_get
+ (&gst_rtph263penc_sink_template), "sink");
+ gst_pad_set_chain_function (rtph263penc->sinkpad, gst_rtph263penc_chain);
+ gst_element_add_pad (GST_ELEMENT (rtph263penc), rtph263penc->sinkpad);
+
+ rtph263penc->adapter = gst_adapter_new ();
+ rtph263penc->mtu = DEFAULT_MTU;
+}
+
+static GstFlowReturn
+gst_rtph263penc_flush (GstRtpH263PEnc * rtph263penc)
+{
+ guint avail;
+ GstBuffer *outbuf;
+ GstFlowReturn ret;
+ gboolean fragmented;
+
+ avail = gst_adapter_available (rtph263penc->adapter);
+ if (avail == 0)
+ return GST_FLOW_OK;
+
+ fragmented = FALSE;
+
+ while (avail > 0) {
+ guint towrite;
+ guint8 *payload;
+ guint8 *data;
+ guint payload_len;
+ gint header_len;
+
+ /* FIXME, do better mtu packing, header len etc should be
+ * included in this calculation. */
+ towrite = MIN (avail, rtph263penc->mtu);
+ /* for fragmented frames we need 2 bytes header, for other
+ * frames we must reuse the first 2 bytes of the data as the
+ * header */
+ header_len = (fragmented ? 2 : 0);
+ payload_len = header_len + towrite;
+
+ outbuf = gst_rtpbuffer_new_allocate (payload_len, 0, 0);
+ gst_rtpbuffer_set_padding (outbuf, 0);
+ gst_rtpbuffer_set_timestamp (outbuf,
+ rtph263penc->first_ts * 90000 / GST_SECOND);
+ gst_rtpbuffer_set_payload_type (outbuf, 0);
+ /* last fragment gets the marker bit set */
+ gst_rtpbuffer_set_marker (outbuf, avail > towrite ? 0 : 1);
+
+ payload = gst_rtpbuffer_get_payload (outbuf);
+
+ data = (guint8 *) gst_adapter_peek (rtph263penc->adapter, towrite);
+ memcpy (&payload[header_len], data, towrite);
+
+ payload[0] = fragmented ? 0x00 : 0x04;
+ payload[1] = 0;
+
+ GST_BUFFER_TIMESTAMP (outbuf) = rtph263penc->first_ts;
+ gst_adapter_flush (rtph263penc->adapter, towrite);
+
+ ret = gst_pad_push (rtph263penc->srcpad, outbuf);
+
+ avail -= towrite;
+ fragmented = TRUE;
+ }
+
+ return ret;
+}
+
+static GstFlowReturn
+gst_rtph263penc_chain (GstPad * pad, GstBuffer * buffer)
+{
+ GstRtpH263PEnc *rtph263penc;
+ GstFlowReturn ret;
+ guint size;
+
+ rtph263penc = GST_RTP_H263P_ENC (GST_OBJECT_PARENT (pad));
+
+ size = GST_BUFFER_SIZE (buffer);
+ rtph263penc->first_ts = GST_BUFFER_TIMESTAMP (buffer);
+
+ /* we always encode and flush a full picture */
+ gst_adapter_push (rtph263penc->adapter, buffer);
+ ret = gst_rtph263penc_flush (rtph263penc);
+
+ return ret;
+}
+
+static void
+gst_rtph263penc_set_property (GObject * object, guint prop_id,
+ const GValue * value, GParamSpec * pspec)
+{
+ GstRtpH263PEnc *rtph263penc;
+
+ rtph263penc = GST_RTP_H263P_ENC (object);
+
+ switch (prop_id) {
+ case PROP_MTU:
+ rtph263penc->mtu = g_value_get_uint (value);
+ break;
+ default:
+ G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+ break;
+ }
+}
+
+static void
+gst_rtph263penc_get_property (GObject * object, guint prop_id, GValue * value,
+ GParamSpec * pspec)
+{
+ GstRtpH263PEnc *rtph263penc;
+
+ rtph263penc = GST_RTP_H263P_ENC (object);
+
+ switch (prop_id) {
+ case PROP_MTU:
+ g_value_set_uint (value, rtph263penc->mtu);
+ break;
+ default:
+ G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+ break;
+ }
+}
+
+static GstElementStateReturn
+gst_rtph263penc_change_state (GstElement * element)
+{
+ GstRtpH263PEnc *rtph263penc;
+ gint transition;
+ GstElementStateReturn ret;
+
+ rtph263penc = GST_RTP_H263P_ENC (element);
+ transition = GST_STATE_TRANSITION (element);
+
+ switch (transition) {
+ case GST_STATE_NULL_TO_READY:
+ break;
+ default:
+ break;
+ }
+
+ ret = GST_ELEMENT_CLASS (parent_class)->change_state (element);
+
+ switch (transition) {
+ case GST_STATE_READY_TO_NULL:
+ break;
+ default:
+ break;
+ }
+ return ret;
+}
+
+gboolean
+gst_rtph263penc_plugin_init (GstPlugin * plugin)
+{
+ return gst_element_register (plugin, "rtph263penc",
+ GST_RANK_NONE, GST_TYPE_RTP_H263P_ENC);
+}
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