teletextdec: New teletext decoder plugin based in zvbi

https://bugzilla.gnome.org/show_bug.cgi?id=619739

configure.ac

@@ -1382,6 +1382,12 @@ AG_GST_CHECK_FEATURE(TIMIDITY, [timidity midi soft synth plugin], timidity, [
   AC_SUBST(TIMIDITY_LIBS)
 ])
 
+dnl *** teletextdec ***
+translit(dnm, m, l) AM_CONDITIONAL(USE_TELETEXTDEC, true)
+AG_GST_CHECK_FEATURE(TELETEXTDEC, [Teletext decoder], teletextdec, [
+  AG_GST_PKG_CHECK_MODULES(TELETEXTDEC, zvbi-0.2)
+ ])
+
 dnl *** wildmidi ***
 translit(dnm, m, l) AM_CONDITIONAL(USE_WILDMIDI, true)
 AG_GST_CHECK_FEATURE(WILDMIDI, [wildmidi midi soft synth plugin], wildmidi, [
@@ -1719,6 +1725,7 @@ AM_CONDITIONAL(USE_SCHRO, false)
 AM_CONDITIONAL(USE_ZBAR, false)
 AM_CONDITIONAL(USE_VP8, false)
 AM_CONDITIONAL(USE_RTMP, false)
+AM_CONDITIONAL(USE_TELETEXTDEC, false)
 
 fi dnl of EXT plugins
 
@@ -1947,6 +1954,7 @@ ext/schroedinger/Makefile
 ext/sdl/Makefile
 ext/sndfile/Makefile
 ext/soundtouch/Makefile
+ext/teletextdec/Makefile
 ext/gme/Makefile
 ext/gsettings/Makefile
 ext/gsettings/org.freedesktop.gstreamer.default-elements.gschema.xml

ext/Makefile.am

@@ -336,6 +336,12 @@ else
 SWFDEC_DIR=
 endif
 
+if USE_TELETEXTDEC
+TELETEXT_DIR=teletextdec
+else
+TELETEXT_DIR=
+endif
+
 if USE_VP8
 VP8_DIR=vp8
 else
@@ -423,6 +429,7 @@ SUBDIRS=\
 	$(GME_DIR) \
 	$(SPC_DIR) \
 	$(SWFDEC_DIR) \
+	$(TELETEXTDEC_DIR) \
 	$(TIMIDITY_DIR) \
 	$(VP8_DIR) \
 	$(XVID_DIR) \
@@ -473,6 +480,7 @@ DIST_SUBDIRS = \
 	spc \
 	gme \
 	swfdec \
+	teletextdec \
 	timidity \
 	voaacenc \
 	voamrwbenc \

ext/teletextdec/Makefile.am

@@ -0,0 +1,10 @@
+plugin_LTLIBRARIES = libgstteletextdec.la
+
+libgstteletextdec_la_SOURCES = gstteletextdec.c teletext.c
+
+libgstteletextdec_la_CFLAGS = $(GST_PLUGINS_BASE_CFLAGS) $(GST_CFLAGS) $(TELETEXTDEC_CFLAGS)
+libgstteletextdec_la_LIBADD = $(GST_PLUGINS_BASE_CFLAGS) $(GST_BASE_LIBS) $(TELETEXTDEC_LIBS)
+libgstteletextdec_la_LDFLAGS = $(GST_PLUGIN_LDFLAGS)
+libgstteletextdec_la_LIBTOOLFLAGS = --tag=disable-static
+
+noinst_HEADERS = gstteletextdec.h

ext/teletextdec/gstteletextdec.h

@@ -0,0 +1,106 @@
+/*
+ * GStreamer
+ * Copyright (C) 2009 Sebastian <sebp@k-d-w.org>
+ * Copyright (C) 2010 Andoni Morales Alastruey <ylatuya@gmail.com>
+ *
+ * This library is free software; you can redistribute it and/or
+ * mod1ify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 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
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor,
+ * Boston, MA  02110-1301  USA
+ */
+
+#ifndef __GST_TELETEXTDEC_H__
+#define __GST_TELETEXTDEC_H__
+
+#include <gst/gst.h>
+#include <libzvbi.h>
+
+G_BEGIN_DECLS
+#define GST_TYPE_TELETEXTDEC \
+  (gst_teletextdec_get_type())
+#define GST_TELETEXTDEC(obj) \
+  (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_TELETEXTDEC,GstTeletextDec))
+#define GST_TELETEXTDEC_CLASS(klass) \
+  (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_TELETEXTDEC,GstTeletextDecClass))
+#define GST_IS_TELETEXTDEC(obj) \
+  (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_TELETEXTDEC))
+#define GST_IS_TELETEXTDEC_CLASS(klass) \
+  (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_TELETEXTDEC))
+typedef struct _GstTeletextDec GstTeletextDec;
+typedef struct _GstTeletextDecClass GstTeletextDecClass;
+typedef struct _GstTeletextFrame GstTeletextFrame;
+typedef enum _GstTeletextOutputFormat GstTeletextOutputFormat;
+
+enum _GstTeletextOutputFormat
+{
+  GST_TELETEXTDEC_OUTPUT_FORMAT_RGBA,
+  GST_TELETEXTDEC_OUTPUT_FORMAT_TEXT,
+  GST_TELETEXTDEC_OUTPUT_FORMAT_HTML,
+  GST_TELETEXTDEC_OUTPUT_FORMAT_SUBTITLES
+};
+
+typedef void (*GstTeletextProcessBufferFunc) (GstTeletextDec *
+    teletext, GstBuffer * buf);
+
+struct _GstTeletextDec
+{
+  GstElement element;
+
+  GstPad *sinkpad;
+  GstPad *srcpad;
+
+  GstClockTime in_timestamp;
+  GstClockTime in_duration;
+  gint rate_numerator;
+  gint rate_denominator;
+
+  /* Props */
+  gint pageno;
+  gint subno;
+  gboolean subtitles_mode;
+  gchar *subtitles_template;
+
+  vbi_dvb_demux *demux;
+  vbi_decoder *decoder;
+  vbi_export *exporter;
+  GQueue *queue;
+  GMutex *queue_lock;
+
+  GstTeletextFrame *frame;
+  float last_ts;
+  GstTeletextOutputFormat output_format;
+
+  GstTeletextProcessBufferFunc process_buf_func;
+};
+
+struct _GstTeletextFrame
+{
+  vbi_sliced *sliced_begin;
+  vbi_sliced *sliced_end;
+  vbi_sliced *current_slice;
+
+  guint last_field;
+  guint last_field_line;
+  guint last_frame_line;
+};
+
+
+struct _GstTeletextDecClass
+{
+  GstElementClass parent_class;
+};
+
+GType gst_teletextdec_get_type (void);
+
+G_END_DECLS
+#endif /* __GST_TELETEXTDEC_H__ */

ext/teletextdec/teletext.c

@@ -0,0 +1,43 @@
+/*
+ * GStreamer
+ * Copyright (C) 2009 Sebastian <sebp@k-d-w.org>
+ *
+ * This library is free software; you can redistribute it and/or
+ * mod1ify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 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
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor,
+ * Boston, MA  02110-1301  USA
+ */
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include <gst/gst.h>
+#include "gstteletextdec.h"
+
+/* entry point to initialize the plug-in
+ * initialize the plug-in itself
+ * register the element factories and other features
+ */
+static gboolean
+teletext_init (GstPlugin * teletext)
+{
+  return gst_element_register (teletext, "teletextdec", GST_RANK_NONE,
+      GST_TYPE_TELETEXTDEC);
+}
+
+GST_PLUGIN_DEFINE (GST_VERSION_MAJOR,
+    GST_VERSION_MINOR,
+    "teletext",
+    "Teletext plugin",
+    teletext_init, VERSION, "LGPL", "GStreamer", "http://gstreamer.net/")