rtp: add BroadcomVoice depayloader

gst/rtp/Makefile.am

@@ -6,6 +6,7 @@ libgstrtp_la_SOURCES = \
 	gstrtpchannels.c \
 	gstrtpdepay.c \
 	gstrtpac3depay.c \
+	gstrtpbvdepay.c \
 	gstrtpbvpay.c \
 	gstrtpceltdepay.c \
 	gstrtpceltpay.c \
@@ -86,6 +87,7 @@ noinst_HEADERS =			\
 		 gstrtpL16depay.h 	\
 		 gstrtpL16pay.h 	\
 		 gstrtpac3depay.h 	\
+		 gstrtpbvdepay.h 	\
 		 gstrtpbvpay.h 	        \
 		 gstrtpceltpay.h	\
 		 gstrtpceltdepay.h	\

gst/rtp/gstrtp.c

@@ -23,6 +23,7 @@
 
 #include "gstrtpdepay.h"
 #include "gstrtpac3depay.h"
+#include "gstrtpbvdepay.h"
 #include "gstrtpbvpay.h"
 #include "gstrtpceltdepay.h"
 #include "gstrtpceltpay.h"
@@ -90,6 +91,9 @@ plugin_init (GstPlugin * plugin)
   if (!gst_rtp_ac3_depay_plugin_init (plugin))
     return FALSE;
 
+  if (!gst_rtp_bv_depay_plugin_init (plugin))
+    return FALSE;
+
   if (!gst_rtp_bv_pay_plugin_init (plugin))
     return FALSE;
 

gst/rtp/gstrtpbvdepay.c

@@ -0,0 +1,187 @@
+/* GStreamer
+ * Copyright (C) <2009> 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 <string.h>
+#include <stdlib.h>
+
+#include <gst/rtp/gstrtpbuffer.h>
+#include "gstrtpbvdepay.h"
+
+/* elementfactory information */
+static const GstElementDetails gst_rtp_bv_depay_details =
+GST_ELEMENT_DETAILS ("RTP BroadcomVoice depayloader",
+    "Codec/Depayloader/Network",
+    "Extracts BroadcomVoice audio from RTP packets (RFC 4298)",
+    "Wim Taymans <wim.taymans@collabora.co.uk>");
+
+static GstStaticPadTemplate gst_rtp_bv_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) \"BV16\"; "
+        "application/x-rtp, "
+        "media = (string) \"audio\", "
+        "payload = (int) " GST_RTP_PAYLOAD_DYNAMIC_STRING ", "
+        "clock-rate = (int) 16000, " "encoding-name = (string) \"BV32\"")
+    );
+
+static GstStaticPadTemplate gst_rtp_bv_depay_src_template =
+GST_STATIC_PAD_TEMPLATE ("src",
+    GST_PAD_SRC,
+    GST_PAD_ALWAYS,
+    GST_STATIC_CAPS ("audio/x-bv, " "mode = (int) { 16, 32 }")
+    );
+
+static GstBuffer *gst_rtp_bv_depay_process (GstBaseRTPDepayload * depayload,
+    GstBuffer * buf);
+static gboolean gst_rtp_bv_depay_setcaps (GstBaseRTPDepayload * depayload,
+    GstCaps * caps);
+
+GST_BOILERPLATE (GstRTPBVDepay, gst_rtp_bv_depay, GstBaseRTPDepayload,
+    GST_TYPE_BASE_RTP_DEPAYLOAD);
+
+static void
+gst_rtp_bv_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_bv_depay_src_template));
+  gst_element_class_add_pad_template (element_class,
+      gst_static_pad_template_get (&gst_rtp_bv_depay_sink_template));
+  gst_element_class_set_details (element_class, &gst_rtp_bv_depay_details);
+}
+
+static void
+gst_rtp_bv_depay_class_init (GstRTPBVDepayClass * klass)
+{
+  GObjectClass *gobject_class;
+  GstBaseRTPDepayloadClass *gstbasertpdepayload_class;
+
+  gobject_class = (GObjectClass *) klass;
+  gstbasertpdepayload_class = (GstBaseRTPDepayloadClass *) klass;
+
+  gstbasertpdepayload_class->process = gst_rtp_bv_depay_process;
+  gstbasertpdepayload_class->set_caps = gst_rtp_bv_depay_setcaps;
+}
+
+static void
+gst_rtp_bv_depay_init (GstRTPBVDepay * rtpbvdepay, GstRTPBVDepayClass * klass)
+{
+  rtpbvdepay->mode = -1;
+}
+
+static gboolean
+gst_rtp_bv_depay_setcaps (GstBaseRTPDepayload * depayload, GstCaps * caps)
+{
+  GstRTPBVDepay *rtpbvdepay = GST_RTP_BV_DEPAY (depayload);
+  GstCaps *srccaps;
+  GstStructure *structure;
+  const gchar *mode_str = NULL;
+  gint mode, clock_rate, expected_rate;
+  gboolean ret;
+
+  structure = gst_caps_get_structure (caps, 0);
+
+  mode_str = gst_structure_get_string (structure, "encoding-name");
+  if (!mode_str)
+    goto no_mode;
+
+  if (!strcmp (mode_str, "BV16")) {
+    mode = 16;
+    expected_rate = 8000;
+  } else if (!strcmp (mode_str, "BV32")) {
+    mode = 32;
+    expected_rate = 16000;
+  } else
+    goto invalid_mode;
+
+  if (!gst_structure_get_int (structure, "clock-rate", &clock_rate))
+    clock_rate = expected_rate;
+  else if (clock_rate != expected_rate)
+    goto wrong_rate;
+
+  depayload->clock_rate = clock_rate;
+  rtpbvdepay->mode = mode;
+
+  srccaps = gst_caps_new_simple ("audio/x-bv",
+      "mode", G_TYPE_INT, rtpbvdepay->mode, NULL);
+  ret = gst_pad_set_caps (GST_BASE_RTP_DEPAYLOAD_SRCPAD (depayload), srccaps);
+
+  GST_DEBUG ("set caps on source: %" GST_PTR_FORMAT " (ret=%d)", srccaps, ret);
+  gst_caps_unref (srccaps);
+
+  return ret;
+
+  /* ERRORS */
+no_mode:
+  {
+    GST_ERROR_OBJECT (rtpbvdepay, "did not receive an encoding-name");
+    return FALSE;
+  }
+invalid_mode:
+  {
+    GST_ERROR_OBJECT (rtpbvdepay,
+        "invalid encoding-name, expected BV16 or BV32, got %s", mode_str);
+    return FALSE;
+  }
+wrong_rate:
+  {
+    GST_ERROR_OBJECT (rtpbvdepay, "invalid clock-rate, expected %d, got %d",
+        expected_rate, clock_rate);
+    return FALSE;
+  }
+}
+
+static GstBuffer *
+gst_rtp_bv_depay_process (GstBaseRTPDepayload * depayload, GstBuffer * buf)
+{
+  GstBuffer *outbuf;
+  gboolean marker;
+
+  marker = gst_rtp_buffer_get_marker (buf);
+
+  GST_DEBUG ("process : got %d bytes, mark %d ts %u seqn %d",
+      GST_BUFFER_SIZE (buf), marker,
+      gst_rtp_buffer_get_timestamp (buf), gst_rtp_buffer_get_seq (buf));
+
+  outbuf = gst_rtp_buffer_get_payload_buffer (buf);
+
+  if (marker) {
+    /* mark start of talkspurt with DISCONT */
+    GST_BUFFER_FLAG_SET (outbuf, GST_BUFFER_FLAG_DISCONT);
+  }
+
+  return outbuf;
+}
+
+gboolean
+gst_rtp_bv_depay_plugin_init (GstPlugin * plugin)
+{
+  return gst_element_register (plugin, "rtpbvdepay",
+      GST_RANK_MARGINAL, GST_TYPE_RTP_BV_DEPAY);
+}

gst/rtp/gstrtpbvdepay.h

@@ -0,0 +1,58 @@
+/* GStreamer
+ * Copyright (C) <2009> 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_BV_DEPAY_H__
+#define __GST_RTP_BV_DEPAY_H__
+
+#include <gst/gst.h>
+#include <gst/rtp/gstbasertpdepayload.h>
+
+G_BEGIN_DECLS
+
+typedef struct _GstRTPBVDepay GstRTPBVDepay;
+typedef struct _GstRTPBVDepayClass GstRTPBVDepayClass;
+
+#define GST_TYPE_RTP_BV_DEPAY \
+  (gst_rtp_bv_depay_get_type())
+#define GST_RTP_BV_DEPAY(obj) \
+  (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_RTP_BV_DEPAY,GstRTPBVDepay))
+#define GST_RTP_BV_DEPAY_CLASS(klass) \
+  (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_RTP_BV_DEPAY,GstRTPBVDepayClass))
+#define GST_IS_RTP_BV_DEPAY(obj) \
+  (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_RTP_BV_DEPAY))
+#define GST_IS_RTP_BV_DEPAY_CLASS(klass) \
+  (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_RTP_BV_DEPAY))
+
+struct _GstRTPBVDepay
+{
+  GstBaseRTPDepayload depayload;
+
+  gint mode;
+};
+
+struct _GstRTPBVDepayClass
+{
+  GstBaseRTPDepayloadClass parent_class;
+};
+
+gboolean gst_rtp_bv_depay_plugin_init (GstPlugin * plugin);
+
+G_END_DECLS
+
+#endif /* __GST_RTP_BV_DEPAY_H__ */