--- /dev/null
+/* GStreamer
+ *
+ * Copyright (C) <2010> Wim Taymans <wim.taymans@gmail.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.
+ */
+
+#ifdef HAVE_CONFIG_H
+# include "config.h"
+#endif
+
+#include <gst/rtp/gstrtpbuffer.h>
+
+#include <stdlib.h>
+#include <string.h>
+#include "gstrtpg723depay.h"
+
+GST_DEBUG_CATEGORY_STATIC (rtpg723depay_debug);
+#define GST_CAT_DEFAULT (rtpg723depay_debug)
+
+
+/* references:
+ *
+ * RFC 3551 (4.5.3)
+ */
+
+/* elementfactory information */
+static const GstElementDetails gst_rtp_g723depay_details =
+GST_ELEMENT_DETAILS ("RTP G.723 depayloader",
+ "Codec/Depayloader/Network",
+ "Extracts G.723 audio from RTP packets (RFC 3551)",
+ "Wim Taymans <wim.taymans@gmail.com>");
+
+enum
+{
+ /* FILL ME */
+ LAST_SIGNAL
+};
+
+enum
+{
+ ARG_0
+};
+
+/* input is an RTP packet
+ *
+ */
+static GstStaticPadTemplate gst_rtp_g723_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) 8000, "
+ "encoding-name = (string) \"G723\"; "
+ "application/x-rtp, "
+ "media = (string) \"audio\", "
+ "payload = (int) " GST_RTP_PAYLOAD_G723_STRING ", "
+ "clock-rate = (int) 8000")
+ );
+
+static GstStaticPadTemplate gst_rtp_g723_depay_src_template =
+GST_STATIC_PAD_TEMPLATE ("src",
+ GST_PAD_SRC,
+ GST_PAD_ALWAYS,
+ GST_STATIC_CAPS ("audio/G723, " "channels = (int) 1," "rate = (int) 8000")
+ );
+
+static gboolean gst_rtp_g723_depay_setcaps (GstBaseRTPDepayload * depayload,
+ GstCaps * caps);
+static GstBuffer *gst_rtp_g723_depay_process (GstBaseRTPDepayload * depayload,
+ GstBuffer * buf);
+
+GST_BOILERPLATE (GstRtpG723Depay, gst_rtp_g723_depay, GstBaseRTPDepayload,
+ GST_TYPE_BASE_RTP_DEPAYLOAD);
+
+static void
+gst_rtp_g723_depay_base_init (gpointer klass)
+{
+ GstElementClass *element_class = GST_ELEMENT_CLASS (klass);
+
+ gst_element_class_add_pad_template (element_class,
+ gst_static_pad_template_get (&gst_rtp_g723_depay_src_template));
+ gst_element_class_add_pad_template (element_class,
+ gst_static_pad_template_get (&gst_rtp_g723_depay_sink_template));
+
+ gst_element_class_set_details (element_class, &gst_rtp_g723depay_details);
+
+ GST_DEBUG_CATEGORY_INIT (rtpg723depay_debug, "rtpg723depay", 0,
+ "G.723 RTP Depayloader");
+}
+
+static void
+gst_rtp_g723_depay_class_init (GstRtpG723DepayClass * klass)
+{
+ GstBaseRTPDepayloadClass *gstbasertpdepayload_class;
+
+ gstbasertpdepayload_class = (GstBaseRTPDepayloadClass *) klass;
+
+ gstbasertpdepayload_class->process = gst_rtp_g723_depay_process;
+ gstbasertpdepayload_class->set_caps = gst_rtp_g723_depay_setcaps;
+}
+
+static void
+gst_rtp_g723_depay_init (GstRtpG723Depay * rtpg723depay,
+ GstRtpG723DepayClass * klass)
+{
+ GstBaseRTPDepayload *depayload;
+
+ depayload = GST_BASE_RTP_DEPAYLOAD (rtpg723depay);
+
+ gst_pad_use_fixed_caps (GST_BASE_RTP_DEPAYLOAD_SRCPAD (depayload));
+}
+
+static gboolean
+gst_rtp_g723_depay_setcaps (GstBaseRTPDepayload * depayload, GstCaps * caps)
+{
+ GstStructure *structure;
+ GstCaps *srccaps;
+ GstRtpG723Depay *rtpg723depay;
+ const gchar *params;
+ gint clock_rate, channels;
+ gboolean ret;
+
+ rtpg723depay = GST_RTP_G723_DEPAY (depayload);
+
+ structure = gst_caps_get_structure (caps, 0);
+
+ if (!(params = gst_structure_get_string (structure, "encoding-params")))
+ channels = 1;
+ else {
+ channels = atoi (params);
+ }
+
+ if (!gst_structure_get_int (structure, "clock-rate", &clock_rate))
+ clock_rate = 8000;
+
+ if (channels != 1)
+ goto wrong_channels;
+
+ if (clock_rate != 8000)
+ goto wrong_clock_rate;
+
+ depayload->clock_rate = clock_rate;
+
+ srccaps = gst_caps_new_simple ("audio/G723",
+ "channels", G_TYPE_INT, channels, "rate", G_TYPE_INT, clock_rate, NULL);
+ ret = gst_pad_set_caps (GST_BASE_RTP_DEPAYLOAD_SRCPAD (depayload), srccaps);
+ gst_caps_unref (srccaps);
+
+ return ret;
+
+ /* ERRORS */
+wrong_channels:
+ {
+ GST_DEBUG_OBJECT (rtpg723depay, "expected 1 channel, got %d", channels);
+ return FALSE;
+ }
+wrong_clock_rate:
+ {
+ GST_DEBUG_OBJECT (rtpg723depay, "expected 8000 clock-rate, got %d",
+ clock_rate);
+ return FALSE;
+ }
+}
+
+
+static GstBuffer *
+gst_rtp_g723_depay_process (GstBaseRTPDepayload * depayload, GstBuffer * buf)
+{
+ GstRtpG723Depay *rtpg723depay;
+ GstBuffer *outbuf = NULL;
+ gint payload_len;
+ gboolean marker;
+
+ rtpg723depay = GST_RTP_G723_DEPAY (depayload);
+
+ payload_len = gst_rtp_buffer_get_payload_len (buf);
+
+ /* At least 4 bytes */
+ if (payload_len < 4)
+ goto too_small;
+
+ GST_LOG_OBJECT (rtpg723depay, "payload len %d", payload_len);
+
+ outbuf = gst_rtp_buffer_get_payload_buffer (buf);
+ marker = gst_rtp_buffer_get_marker (buf);
+
+ if (marker) {
+ /* marker bit starts talkspurt */
+ GST_BUFFER_FLAG_SET (outbuf, GST_BUFFER_FLAG_DISCONT);
+ }
+
+ GST_LOG_OBJECT (depayload, "pushing buffer of size %d",
+ GST_BUFFER_SIZE (outbuf));
+
+ return outbuf;
+
+ /* ERRORS */
+too_small:
+ {
+ GST_ELEMENT_WARNING (rtpg723depay, STREAM, DECODE,
+ (NULL), ("G723 RTP payload too small (%d)", payload_len));
+ goto bad_packet;
+ }
+bad_packet:
+ {
+ /* no fatal error */
+ return NULL;
+ }
+}
+
+gboolean
+gst_rtp_g723_depay_plugin_init (GstPlugin * plugin)
+{
+ return gst_element_register (plugin, "rtpg723depay",
+ GST_RANK_MARGINAL, GST_TYPE_RTP_G723_DEPAY);
+}
--- /dev/null
+/* GStreamer
+ *
+ * Copyright (C) <2010> Wim Taymans <wim.taymans@gmail.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_RTP_G723_DEPAY_H__
+#define __GST_RTP_G723_DEPAY_H__
+
+#include <gst/gst.h>
+#include <gst/rtp/gstbasertpdepayload.h>
+
+G_BEGIN_DECLS
+
+#define GST_TYPE_RTP_G723_DEPAY \
+ (gst_rtp_g723_depay_get_type())
+#define GST_RTP_G723_DEPAY(obj) \
+ (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_RTP_G723_DEPAY,GstRtpG723Depay))
+#define GST_RTP_G723_DEPAY_CLASS(klass) \
+ (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_RTP_G723_DEPAY,GstRtpG723DepayClass))
+#define GST_IS_RTP_G723_DEPAY(obj) \
+ (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_RTP_G723_DEPAY))
+#define GST_IS_RTP_G723_DEPAY_CLASS(klass) \
+ (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_RTP_G723_DEPAY))
+
+typedef struct _GstRtpG723Depay GstRtpG723Depay;
+typedef struct _GstRtpG723DepayClass GstRtpG723DepayClass;
+
+struct _GstRtpG723Depay
+{
+ GstBaseRTPDepayload depayload;
+};
+
+struct _GstRtpG723DepayClass
+{
+ GstBaseRTPDepayloadClass parent_class;
+};
+
+gboolean gst_rtp_g723_depay_plugin_init (GstPlugin * plugin);
+
+G_END_DECLS
+
+#endif /* __GST_RTP_G723_DEPAY_H__ */
projects / platform / upstream / gst-plugins-good.git / commitdiff