added hermes

Original commit message from CVS:
added hermes

configure.ac

@@ -473,9 +473,10 @@ GST_CHECK_CONFIGPROG(GNOME_VFS, gnome-config vfs)
 ])
 
 dnl *** gsm ***
-translit(dnm, m, l) AM_CONDITIONAL(USE_LIBGSM, true)
-GST_CHECK_FEATURE(LIBGSM, [GSM library], gsmenc gsmdec, [
-GST_CHECK_LIBHEADER(LIBGSM, gsm, gsm_create, , gsm/gsm.h, LIBGSM_LIBS="-lgsm")
+translit(dnm, m, l) AM_CONDITIONAL(USE_GSM, true)
+GST_CHECK_FEATURE(GSM, [GSM library], gsmenc gsmdec, [
+  GST_CHECK_LIBHEADER(GSM, gsm, gsm_create, , gsm/gsm.h, GSM_LIBS="-lgsm")
+  AC_SUBST(GSM_LIBS)
 ])
 
 dnl *** Hermes ***
@@ -1076,6 +1077,8 @@ ext/cdparanoia/Makefile
 ext/dvdread/Makefile
 ext/esd/Makefile
 ext/flac/Makefile
+ext/gsm/Makefile
+ext/hermes/Makefile
 ext/lame/Makefile
 ext/mad/Makefile
 ext/mpeg2dec/Makefile

ext/Makefile.am

@@ -52,12 +52,24 @@ endif
 FESTIVAL_DIR=
 ## endif
 
+if USE_GSM
+GSM_DIR=gsm
+else
+GSM_DIR=
+endif
+
 if USE_FLAC
 FLAC_DIR=flac
 else
 FLAC_DIR=
 endif
 
+if USE_HERMES
+HERMES_DIR=hermes
+else
+HERMES_DIR=
+endif
+
 if USE_LAME
 LAME_DIR=lame
 else
@@ -90,9 +102,9 @@ endif
 
 SUBDIRS=$(A52_DIR) $(AALIB_DIR) $(ALSA_DIR) $(AUDIOFILE_DIR) \
 	$(AVIFILE_DIR) $(CDPARANOIA_DIR) $(DVDREAD_DIR) $(ESD_DIR) \
-        $(FESTIVAL_DIR) $(FLAC_DIR) \
+        $(FESTIVAL_DIR) $(FLAC_DIR) $(GSM_DIR) $(HERMES_DIR) \
 	$(LAME_DIR) $(MAD_DIR) $(MPEG2DEC_DIR) \
 	$(SDL_DIR) $(VORBIS_DIR)
 
 DIST_SUBDIRS=a52 aalib alsa avifile audiofile cdparanoia dvdread esd \
-	     festival flac lame mad mpeg2dec sdl vorbis
+	     festival flac gsm hermes lame mad mpeg2dec sdl vorbis

ext/gsm/Makefile.am

+plugindir = $(libdir)/gst
+
+plugin_LTLIBRARIES = libgstgsm.la
+
+libgstgsm_la_SOURCES = gstgsm.c gstgsmdec.c gstgsmenc.c
+libgstgsm_la_LIBADD = $(GSM_LIBS)
+libgstgsm_la_CFLAGS = $(GST_CFLAGS)
+
+noinst_HEADERS = gstgsmenc.h gstgsmdec.h 
+
+#check_PROGRAMS = test
+
+#test_CFLAGS = $(GSM_CFLAGS)
+#test_LDADD = $(GSM_LIBS) $(top_srcdir)/gst/libgst.la
+#test_SOURCES = test.c

ext/gsm/gstgsm.c

+/* Gnome-Streamer
+ * Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
+ *
+ * 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.
+ */
+
+
+#include "gstgsmdec.h"
+#include "gstgsmenc.h"
+
+/* elementfactory information */
+extern GstElementDetails gst_gsmdec_details;
+extern GstElementDetails gst_gsmenc_details;
+
+GstPadTemplate *gsmdec_src_template, *gsmdec_sink_template; 
+GstPadTemplate *gsmenc_src_template, *gsmenc_sink_template;
+
+GST_CAPS_FACTORY (gsm_caps_factory,
+  GST_CAPS_NEW (
+    "gsm_gsm",
+    "audio/x-gsm",
+      "rate",       GST_PROPS_INT_RANGE (4000, 48000)
+  )
+)
+
+GST_CAPS_FACTORY (raw_caps_factory,
+  GST_CAPS_NEW (
+    "gsm_raw",
+    "audio/raw",
+    "format",       GST_PROPS_STRING ("int"),
+      "law",        GST_PROPS_INT (0),
+      "endianness", GST_PROPS_INT (G_BYTE_ORDER),
+      "signed",     GST_PROPS_BOOLEAN (TRUE),
+      "width",      GST_PROPS_INT (16),
+      "depth",      GST_PROPS_INT (16),
+      "rate",       GST_PROPS_INT_RANGE (4000, 48000),
+      "channels",   GST_PROPS_INT (1)
+  )
+)
+
+static gboolean
+plugin_init (GModule *module, GstPlugin *plugin)
+{
+  GstElementFactory *dec, *enc;
+  GstCaps *raw_caps, *gsm_caps;
+
+  /* create an elementfactory for the gsmdec element */
+  enc = gst_elementfactory_new("gsmenc",GST_TYPE_GSMENC,
+                                   &gst_gsmenc_details);
+  g_return_val_if_fail(enc != NULL, FALSE);
+
+  raw_caps = GST_CAPS_GET (raw_caps_factory);
+  gsm_caps = GST_CAPS_GET (gsm_caps_factory);
+
+  /* register sink pads */
+  gsmenc_sink_template = gst_padtemplate_new ("sink", GST_PAD_SINK, 
+		                              GST_PAD_ALWAYS, 
+					      raw_caps, NULL);
+  gst_elementfactory_add_padtemplate (enc, gsmenc_sink_template);
+
+  /* register src pads */
+  gsmenc_src_template = gst_padtemplate_new ("src", GST_PAD_SRC, 
+		                             GST_PAD_ALWAYS, 
+					     gsm_caps, NULL);
+  gst_elementfactory_add_padtemplate (enc, gsmenc_src_template);
+
+  gst_plugin_add_feature (plugin, GST_PLUGIN_FEATURE (enc));
+
+  /* create an elementfactory for the gsmdec element */
+  dec = gst_elementfactory_new("gsmdec",GST_TYPE_GSMDEC,
+                                   &gst_gsmdec_details);
+  g_return_val_if_fail(dec != NULL, FALSE);
+ 
+  /* register sink pads */
+  gsmdec_sink_template = gst_padtemplate_new ("sink", GST_PAD_SINK, 
+		                              GST_PAD_ALWAYS, 
+					      gsm_caps, NULL);
+  gst_elementfactory_add_padtemplate (dec, gsmdec_sink_template);
+
+  /* register src pads */
+  gsmdec_src_template = gst_padtemplate_new ("src", GST_PAD_SRC, 
+		                             GST_PAD_ALWAYS, 
+					     raw_caps, NULL);
+  gst_elementfactory_add_padtemplate (dec, gsmdec_src_template);
+  
+  gst_plugin_add_feature (plugin, GST_PLUGIN_FEATURE (dec));
+
+  return TRUE;
+}
+
+GstPluginDesc plugin_desc = {
+  GST_VERSION_MAJOR,
+  GST_VERSION_MINOR,
+  "gsm",
+  plugin_init
+};

ext/gsm/gstgsmdec.c

+/* Gnome-Streamer
+ * Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
+ *
+ * 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.
+ */
+
+
+#include <string.h>
+
+#include "gstgsmdec.h"
+
+extern GstPadTemplate *gsmdec_src_template, *gsmdec_sink_template;
+
+/* elementfactory information */
+GstElementDetails gst_gsmdec_details = {
+  "gsm audio decoder",
+  "Filter/Decoder/Audio",
+  ".gsm",
+  VERSION,
+  "Wim Taymans <wim.taymans@chello.be>",
+  "(C) 2000",
+};
+
+/* GSMDec signals and args */
+enum {
+  /* FILL ME */
+  LAST_SIGNAL
+};
+
+enum {
+  ARG_0,
+  /* FILL ME */
+};
+
+static void	gst_gsmdec_class_init	(GstGSMDec *klass);
+static void	gst_gsmdec_init		(GstGSMDec *gsmdec);
+
+static void	gst_gsmdec_chain	(GstPad *pad, GstBuffer *buf);
+static void 	gst_gsmdec_newcaps 	(GstPad *pad, GstCaps *caps);
+
+static GstElementClass *parent_class = NULL;
+//static guint gst_gsmdec_signals[LAST_SIGNAL] = { 0 };
+
+GType
+gst_gsmdec_get_type(void) {
+  static GType gsmdec_type = 0;
+
+  if (!gsmdec_type) {
+    static const GTypeInfo gsmdec_info = {
+      sizeof(GstGSMDecClass),      NULL,
+      NULL,
+      (GClassInitFunc)gst_gsmdec_class_init,
+      NULL,
+      NULL,
+      sizeof(GstGSMDec),
+      0,
+      (GInstanceInitFunc)gst_gsmdec_init,
+    };
+    gsmdec_type = g_type_register_static(GST_TYPE_ELEMENT, "GstGSMDec", &gsmdec_info, 0);
+  }
+  return gsmdec_type;
+}
+
+static void
+gst_gsmdec_class_init (GstGSMDec *klass)
+{
+  GstElementClass *gstelement_class;
+
+  gstelement_class = (GstElementClass*)klass;
+
+  parent_class = g_type_class_ref(GST_TYPE_ELEMENT);
+}
+
+static void
+gst_gsmdec_init (GstGSMDec *gsmdec)
+{
+  GST_DEBUG (0,"gst_gsmdec_init: initializing\n");
+
+  /* create the sink and src pads */
+  gsmdec->sinkpad = gst_pad_new_from_template (gsmdec_sink_template, "sink");
+  gst_element_add_pad (GST_ELEMENT (gsmdec), gsmdec->sinkpad);
+  gst_pad_set_chain_function (gsmdec->sinkpad, gst_gsmdec_chain);
+  gst_pad_set_newcaps_function (gsmdec->sinkpad, gst_gsmdec_newcaps);
+
+  gsmdec->srcpad = gst_pad_new_from_template (gsmdec_src_template, "src");
+  gst_element_add_pad (GST_ELEMENT (gsmdec), gsmdec->srcpad);
+
+  gsmdec->state = gsm_create ();
+  gsmdec->bufsize = 0;
+}
+
+static void
+gst_gsmdec_newcaps (GstPad *pad, GstCaps *caps)
+{
+  GstGSMDec *gsmdec;
+  
+  gsmdec = GST_GSMDEC (gst_pad_get_parent (pad));
+
+  gst_pad_set_caps (gsmdec->srcpad, GST_CAPS_NEW (
+	  		"gsm_raw",
+			"audio/raw",
+			  "format",       GST_PROPS_STRING ("int"),
+			    "law",        GST_PROPS_INT (0),
+			    "endianness", GST_PROPS_INT (G_BYTE_ORDER),
+			    "signed",     GST_PROPS_BOOLEAN (TRUE),
+			    "width",      GST_PROPS_INT (16),
+			    "depth",      GST_PROPS_INT (16),
+			    "rate",       GST_PROPS_INT (gst_caps_get_int (caps, "rate")),
+			    "channels",   GST_PROPS_INT (1)
+			   ));
+}
+
+static void
+gst_gsmdec_chain (GstPad *pad, GstBuffer *buf)
+{
+  GstGSMDec *gsmdec;
+  gsm_byte *data;
+  guint size;
+
+  g_return_if_fail(pad != NULL);
+  g_return_if_fail(GST_IS_PAD(pad));
+  g_return_if_fail(buf != NULL);
+  //g_return_if_fail(GST_IS_BUFFER(buf));
+
+  gsmdec = GST_GSMDEC (gst_pad_get_parent (pad));
+
+  data = (gsm_byte*) GST_BUFFER_DATA (buf);
+  size = GST_BUFFER_SIZE (buf);
+
+  if (gsmdec->bufsize && (gsmdec->bufsize + size >= 33)) {
+    GstBuffer *outbuf;
+
+    memcpy (gsmdec->buffer + gsmdec->bufsize, data, (33 - gsmdec->bufsize) * sizeof (gsm_byte));
+
+    outbuf = gst_buffer_new ();
+    GST_BUFFER_DATA (outbuf) = g_malloc (160 * sizeof (gsm_signal));
+    GST_BUFFER_SIZE (outbuf) = 160 * sizeof (gsm_signal);
+
+    gsm_decode (gsmdec->state, gsmdec->buffer, (gsm_signal *) GST_BUFFER_DATA (outbuf));
+
+    gst_pad_push (gsmdec->srcpad, outbuf);
+
+    size -= (33 - gsmdec->bufsize);
+    data += (33 - gsmdec->bufsize);
+    gsmdec->bufsize = 0;
+  }
+
+  while (size >= 33) {
+    GstBuffer *outbuf;
+
+    outbuf = gst_buffer_new ();
+    GST_BUFFER_DATA (outbuf) = g_malloc (160 * sizeof (gsm_signal));
+    GST_BUFFER_SIZE (outbuf) = 160 * sizeof (gsm_signal);
+    
+    gsm_decode (gsmdec->state, data, (gsm_signal *)GST_BUFFER_DATA (outbuf));
+
+    gst_pad_push (gsmdec->srcpad, outbuf);
+
+    size -= 33;
+    data += 33;
+  }
+
+  if (size) {
+    memcpy (gsmdec->buffer + gsmdec->bufsize, data, size * sizeof (gsm_byte));
+    gsmdec->bufsize += size;
+  }
+
+  gst_buffer_unref(buf);
+}
+

ext/gsm/gstgsmdec.h

+/* Gnome-Streamer
+ * Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
+ *
+ * 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_GSMDEC_H__
+#define __GST_GSMDEC_H__
+
+
+#include <config.h>
+#include <gst/gst.h>
+
+#include <gsm/gsm.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif /* __cplusplus */
+
+
+#define GST_TYPE_GSMDEC \
+  (gst_gsmdec_get_type())
+#define GST_GSMDEC(obj) \
+  (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_GSMDEC,GstGSMDec))
+#define GST_GSMDEC_CLASS(klass) \
+  (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_GSMDEC,GstGSMDec))
+#define GST_IS_GSMDEC(obj) \
+  (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_GSMDEC))
+#define GST_IS_GSMDEC_CLASS(obj) \
+  (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_GSMDEC))
+
+typedef struct _GstGSMDec GstGSMDec;
+typedef struct _GstGSMDecClass GstGSMDecClass;
+
+struct _GstGSMDec {
+  GstElement element;
+
+  /* pads */
+  GstPad *sinkpad,*srcpad;
+
+  gsm state;
+  gsm_byte buffer[33];
+  gint bufsize;
+};
+
+struct _GstGSMDecClass {
+  GstElementClass parent_class;
+};
+
+GType gst_gsmdec_get_type(void);
+
+
+#ifdef __cplusplus
+}
+#endif /* __cplusplus */
+
+
+#endif /* __GST_GSMDEC_H__ */

ext/gsm/gstgsmenc.c

+/* Gnome-Streamer
+ * Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
+ *
+ * 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.
+ */
+
+
+#include <string.h>
+
+#include "gstgsmenc.h"
+
+extern GstPadTemplate *gsmenc_src_template, *gsmenc_sink_template;
+
+/* elementfactory information */
+GstElementDetails gst_gsmenc_details = {
+  "gsm audio encoder",
+  "Filter/Encoder/Audio",
+  ".gsm",
+  VERSION,
+  "Wim Taymans <wim.taymans@chello.be>",
+  "(C) 2000",
+};
+
+/* GSMEnc signals and args */
+enum {
+  FRAME_ENCODED,
+  /* FILL ME */
+  LAST_SIGNAL
+};
+
+enum {
+  ARG_0,
+  /* FILL ME */
+};
+
+static void		gst_gsmenc_class_init	(GstGSMEnc *klass);
+static void		gst_gsmenc_init		(GstGSMEnc *gsmenc);
+
+static void		gst_gsmenc_chain	(GstPad *pad,GstBuffer *buf);
+static void 		gst_gsmenc_newcaps 	(GstPad *pad, GstCaps *caps);
+
+static GstElementClass *parent_class = NULL;
+static guint gst_gsmenc_signals[LAST_SIGNAL] = { 0 };
+
+GType
+gst_gsmenc_get_type (void)
+{
+  static GType gsmenc_type = 0;
+
+  if (!gsmenc_type) {
+    static const GTypeInfo gsmenc_info = {
+      sizeof (GstGSMEncClass),
+      NULL,
+      NULL,
+      (GClassInitFunc) gst_gsmenc_class_init,
+      NULL,
+      NULL,
+      sizeof (GstGSMEnc),
+      0,
+      (GInstanceInitFunc) gst_gsmenc_init,
+    };
+    gsmenc_type = g_type_register_static (GST_TYPE_ELEMENT, "GstGSMEnc", &gsmenc_info, 0);
+  }
+  return gsmenc_type;
+}
+
+static void
+gst_gsmenc_class_init (GstGSMEnc *klass)
+{
+  GObjectClass *gobject_class;
+  GstElementClass *gstelement_class;
+
+  gobject_class = (GObjectClass*) klass;
+  gstelement_class = (GstElementClass*) klass;
+
+  parent_class = g_type_class_ref (GST_TYPE_ELEMENT);
+
+  gst_gsmenc_signals[FRAME_ENCODED] =
+    g_signal_new ("frame_encoded", G_TYPE_FROM_CLASS(klass), G_SIGNAL_RUN_LAST,
+                   G_STRUCT_OFFSET (GstGSMEncClass, frame_encoded), NULL, NULL,
+                   g_cclosure_marshal_VOID__VOID, G_TYPE_NONE, 0);
+}
+
+
+static void
+gst_gsmenc_init (GstGSMEnc *gsmenc)
+{
+  /* create the sink and src pads */
+  gsmenc->sinkpad = gst_pad_new_from_template (gsmenc_sink_template, "sink");
+  gst_element_add_pad (GST_ELEMENT (gsmenc), gsmenc->sinkpad);
+  gst_pad_set_chain_function (gsmenc->sinkpad, gst_gsmenc_chain);
+  gst_pad_set_newcaps_function (gsmenc->sinkpad, gst_gsmenc_newcaps);
+
+  gsmenc->srcpad = gst_pad_new_from_template (gsmenc_src_template, "src");
+  gst_element_add_pad (GST_ELEMENT (gsmenc), gsmenc->srcpad);
+
+  gsmenc->state = gsm_create ();
+  gsmenc->bufsize = 0;
+  gsmenc->next_ts = 0;
+  gsmenc->rate = 8000;
+}
+
+static void
+gst_gsmenc_newcaps (GstPad *pad, GstCaps *caps)
+{
+  GstGSMEnc *gsmenc;
+
+  gsmenc = GST_GSMENC (gst_pad_get_parent (pad));
+
+  gsmenc->rate = gst_caps_get_int (caps, "rate");
+
+  gst_pad_set_caps (gsmenc->srcpad, GST_CAPS_NEW (
+                              "gsm_gsm",
+                              "audio/x-gsm",
+                                "rate",       GST_PROPS_INT (gsmenc->rate)
+                               ));
+}
+
+static void
+gst_gsmenc_chain (GstPad *pad, GstBuffer *buf)
+{
+  GstGSMEnc *gsmenc;
+  gsm_signal *data;
+  guint size;
+
+  g_return_if_fail (pad != NULL);
+  g_return_if_fail (GST_IS_PAD (pad));
+  g_return_if_fail (buf != NULL);
+
+  gsmenc = GST_GSMENC (GST_OBJECT_PARENT (pad));
+	      
+  data = (gsm_signal*) GST_BUFFER_DATA (buf);
+  size = GST_BUFFER_SIZE (buf) / sizeof (gsm_signal);
+
+  if (gsmenc->bufsize && (gsmenc->bufsize + size >= 160)) {
+    GstBuffer *outbuf;
+
+    memcpy (gsmenc->buffer + gsmenc->bufsize, data, (160 - gsmenc->bufsize) * sizeof (gsm_signal));
+
+    outbuf = gst_buffer_new ();
+    GST_BUFFER_DATA (outbuf) = g_malloc (33 * sizeof (gsm_byte));
+    GST_BUFFER_SIZE (outbuf) = 33 * sizeof (gsm_byte);
+
+    gsm_encode (gsmenc->state, gsmenc->buffer, (gsm_byte *) GST_BUFFER_DATA (outbuf));
+
+    GST_BUFFER_TIMESTAMP (outbuf) = gsmenc->next_ts;
+    gst_pad_push (gsmenc->srcpad, outbuf);
+    gsmenc->next_ts += (160.0 / gsmenc->rate) * 1000000;
+
+    size -= (160 - gsmenc->bufsize); 
+    data += (160 - gsmenc->bufsize);
+    gsmenc->bufsize = 0;
+  }
+
+  while (size >= 160) {
+    GstBuffer *outbuf;
+
+    outbuf = gst_buffer_new ();
+    GST_BUFFER_DATA (outbuf) = g_malloc (33 * sizeof (gsm_byte));
+    GST_BUFFER_SIZE (outbuf) = 33 * sizeof (gsm_byte);
+
+    gsm_encode (gsmenc->state, data, (gsm_byte *) GST_BUFFER_DATA (outbuf));
+
+    GST_BUFFER_TIMESTAMP (outbuf) = gsmenc->next_ts;
+    gst_pad_push (gsmenc->srcpad, outbuf);
+    gsmenc->next_ts += (160.0 / gsmenc->rate) * 1000000;
+
+    size -= 160;
+    data += 160;
+  }
+
+  if (size) {
+    memcpy (gsmenc->buffer + gsmenc->bufsize, data, size * sizeof (gsm_signal));
+    gsmenc->bufsize += size;
+  }
+
+  gst_buffer_unref(buf);
+}

ext/gsm/gstgsmenc.h

+/* Gnome-Streamer
+ * Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
+ *
+ * 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_GSMENC_H__
+#define __GST_GSMENC_H__
+
+
+#include <config.h>
+#include <gst/gst.h>
+
+#include <gsm/gsm.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif /* __cplusplus */
+
+
+#define GST_TYPE_GSMENC \
+  (gst_gsmenc_get_type())
+#define GST_GSMENC(obj) \
+  (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_GSMENC,GstGSMEnc))
+#define GST_GSMENC_CLASS(klass) \
+  (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_GSMENC,GstGSMEnc))
+#define GST_IS_GSMENC(obj) \
+  (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_GSMENC))
+#define GST_IS_GSMENC_CLASS(obj) \
+  (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_GSMENC))
+
+typedef struct _GstGSMEnc GstGSMEnc;
+typedef struct _GstGSMEncClass GstGSMEncClass;
+
+struct _GstGSMEnc {
+  GstElement element;
+
+  /* pads */
+  GstPad *sinkpad,*srcpad;
+
+  gsm state;
+  gsm_signal buffer[160];
+  gint bufsize;
+
+  guint64 next_ts;
+  gint rate;
+};
+
+struct _GstGSMEncClass {
+  GstElementClass parent_class;
+
+  /* signals */
+  void (*frame_encoded) (GstElement *element);
+};
+
+GType gst_gsmenc_get_type(void);
+
+