a hack to work around intltool's brokenness a current check for mpeg2dec details->klass reorganizations an element br...

Original commit message from CVS:
* a hack to work around intltool's brokenness
* a current check for mpeg2dec
* details->klass reorganizations
* an element browser that uses details->klass
* separated cdxa parse out from the avi directory

1 files changed, 363 insertions, 0 deletions

diff --git a/gst/cdxaparse/gstcdxaparse.c b/gst/cdxaparse/gstcdxaparse.c
new file mode 100644
index 00000000..b26ae051
--- /dev/null
+++ b/gst/cdxaparse/gstcdxaparse.c
@@ -0,0 +1,363 @@
+/* GStreamer
+ * Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
+ *               <2002> Wim Taymans <wim.taymans@chello.be>
+ *
+ * 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 "gstcdxaparse.h"
+
+#define MAKE_FOUR_CC(a,b,c,d) ( ((guint32)a)     | (((guint32)b)<< 8) | \
+	                        ((guint32)c)<<16 | (((guint32)d)<<24) )
+
+
+/* RIFF types */
+#define GST_RIFF_TAG_RIFF  MAKE_FOUR_CC('R','I','F','F')
+#define GST_RIFF_RIFF_CDXA MAKE_FOUR_CC('C','D','X','A')
+
+
+#define GST_RIFF_TAG_fmt  MAKE_FOUR_CC('f','m','t',' ')
+#define GST_RIFF_TAG_data MAKE_FOUR_CC('d','a','t','a')
+
+
+/* elementfactory information */
+static GstElementDetails gst_cdxa_parse_details = {
+  ".dat parser",
+  "Codec/Parser",
+  "Parse a .dat file (VCD) into raw mpeg1",
+  VERSION,
+  "Wim Taymans <wim.taymans@tvd.be>",
+  "(C) 2002",
+};
+
+static GstCaps* cdxa_type_find (GstBuffer *buf, gpointer private);
+
+/* typefactory for 'cdxa' */
+static GstTypeDefinition cdxadefinition = {
+  "cdxaparse_video/avi",
+  "video/avi",
+  ".dat",
+  cdxa_type_find,
+};
+
+/* CDXAParse signals and args */
+enum {
+  /* FILL ME */
+  LAST_SIGNAL
+};
+
+enum {
+  ARG_0,
+  /* FILL ME */
+};
+
+GST_PAD_TEMPLATE_FACTORY (sink_templ,
+  "sink",
+  GST_PAD_SINK,
+  GST_PAD_ALWAYS,
+  GST_CAPS_NEW (
+    "cdxaparse_sink",
+     "video/avi",
+      "format", GST_PROPS_STRING ("CDXA")
+  )
+)
+
+GST_PAD_TEMPLATE_FACTORY (src_templ,
+  "src",
+  GST_PAD_SRC,
+  GST_PAD_ALWAYS,
+  GST_CAPS_NEW (
+    "cdxaparse_src",
+    "video/mpeg",
+      "mpegversion",   GST_PROPS_INT (1),
+      "systemstream",  GST_PROPS_BOOLEAN (TRUE)
+  )
+)
+
+static void 	gst_cdxa_parse_class_init	(GstCDXAParseClass *klass);
+static void 	gst_cdxa_parse_init		(GstCDXAParse *cdxa_parse);
+
+static void 	gst_cdxa_parse_loop 		(GstElement *element);
+
+static GstElementStateReturn
+		gst_cdxa_parse_change_state 	(GstElement *element);
+
+
+static GstElementClass *parent_class = NULL;
+/*static guint gst_cdxa_parse_signals[LAST_SIGNAL] = { 0 }; */
+
+GType
+gst_cdxa_parse_get_type(void) 
+{
+  static GType cdxa_parse_type = 0;
+
+  if (!cdxa_parse_type) {
+    static const GTypeInfo cdxa_parse_info = {
+      sizeof(GstCDXAParseClass),      
+      NULL,
+      NULL,
+      (GClassInitFunc)gst_cdxa_parse_class_init,
+      NULL,
+      NULL,
+      sizeof(GstCDXAParse),
+      0,
+      (GInstanceInitFunc)gst_cdxa_parse_init,
+    };
+    cdxa_parse_type = g_type_register_static(GST_TYPE_ELEMENT, "GstCDXAParse", &cdxa_parse_info, 0);
+  }
+  return cdxa_parse_type;
+}
+
+static void
+gst_cdxa_parse_class_init (GstCDXAParseClass *klass) 
+{
+  GObjectClass *gobject_class;
+  GstElementClass *gstelement_class;
+
+  gobject_class = (GObjectClass*)klass;
+  gstelement_class = (GstElementClass*)klass;
+
+  parent_class = g_type_class_ref (GST_TYPE_ELEMENT);
+  
+  gstelement_class->change_state = gst_cdxa_parse_change_state;
+}
+
+static void 
+gst_cdxa_parse_init (GstCDXAParse *cdxa_parse) 
+{
+  GST_FLAG_SET (cdxa_parse, GST_ELEMENT_EVENT_AWARE);
+				
+  cdxa_parse->sinkpad = gst_pad_new_from_template (
+		  GST_PAD_TEMPLATE_GET (sink_templ), "sink");
+  gst_element_add_pad (GST_ELEMENT (cdxa_parse), cdxa_parse->sinkpad);
+
+  cdxa_parse->srcpad = gst_pad_new_from_template (
+		  GST_PAD_TEMPLATE_GET (src_templ), "src");
+  gst_element_add_pad (GST_ELEMENT (cdxa_parse), cdxa_parse->srcpad);
+
+  gst_element_set_loop_function (GST_ELEMENT (cdxa_parse), gst_cdxa_parse_loop);
+
+}
+
+static GstCaps*
+cdxa_type_find (GstBuffer *buf,
+              gpointer private)
+{
+  gchar *data = GST_BUFFER_DATA (buf);
+  GstCaps *new;
+
+  GST_DEBUG (0,"cdxa_parse: typefind");
+
+  if (GUINT32_FROM_LE (((guint32 *)data)[0]) != GST_RIFF_TAG_RIFF)
+    return NULL;
+  if (GUINT32_FROM_LE (((guint32 *)data)[2]) != GST_RIFF_RIFF_CDXA)
+    return NULL;
+
+  new = GST_CAPS_NEW ("cdxa_type_find",
+		      "video/avi", 
+		        "RIFF", GST_PROPS_STRING ("CDXA"));
+
+  return new;
+}
+
+static gboolean
+gst_cdxa_parse_handle_event (GstCDXAParse *cdxa_parse)
+{
+  guint32 remaining;
+  GstEvent *event;
+  GstEventType type;
+  
+  gst_bytestream_get_status (cdxa_parse->bs, &remaining, &event);
+
+  type = event? GST_EVENT_TYPE (event) : GST_EVENT_UNKNOWN;
+
+  switch (type) {
+    case GST_EVENT_EOS:
+      gst_pad_event_default (cdxa_parse->sinkpad, event);
+      break;
+    case GST_EVENT_SEEK:
+      g_warning ("seek event\n");
+      break;
+    case GST_EVENT_FLUSH:
+      g_warning ("flush event\n");
+      break;
+    case GST_EVENT_DISCONTINUOUS:
+      g_warning ("discont event\n");
+      break;
+    default:
+      g_warning ("unhandled event %d\n", type);
+      break;
+  }
+
+  return TRUE;
+}
+
+/*
+
+CDXA starts with the following header:
+ 
+! RIFF:4 ! size:4 ! "CDXA" ! "fmt " ! size:4 ! (size+1)&~1 bytes of crap ! 
+! "data" ! data_size:4 ! (data_size/2352) sectors...
+
+*/
+
+typedef struct 
+{
+  gchar   RIFF_tag[4];
+  guint32 riff_size;
+  gchar   CDXA_tag[4];
+  gchar   fmt_tag[4];
+  guint32 fmt_size;
+} CDXAParseHeader;
+   
+/*
+A sectors is 2352 bytes long and is composed of:
+
+!  sync    !  header ! subheader ! data ...   ! edc     !
+! 12 bytes ! 4 bytes ! 8 bytes   ! 2324 bytes ! 4 bytes !
+!-------------------------------------------------------!
+
+We parse the data out of it and send it to the srcpad.
+*/
+
+static void
+gst_cdxa_parse_loop (GstElement *element)
+{
+  GstCDXAParse *cdxa_parse;
+  CDXAParseHeader *header;
+
+  g_return_if_fail (element != NULL);
+  g_return_if_fail (GST_IS_CDXA_PARSE (element));
+
+  cdxa_parse = GST_CDXA_PARSE (element);
+
+  if (cdxa_parse->state == CDXA_PARSE_HEADER) {
+    guint32 fmt_size;
+    guint8 *buf;
+
+    header = (CDXAParseHeader *) gst_bytestream_peek_bytes (cdxa_parse->bs, 20);
+    if (!header)
+      return;
+
+    cdxa_parse->riff_size = GUINT32_FROM_LE (header->riff_size);
+    fmt_size = (GUINT32_FROM_LE (header->fmt_size) + 1)&~1;
+
+    /* flush the header + fmt_size bytes + 4 bytes "data" */
+    if (!gst_bytestream_flush (cdxa_parse->bs, 20 + fmt_size + 4))
+      return;
+    
+    /* get the data size */
+    buf = gst_bytestream_peek_bytes (cdxa_parse->bs, 4);
+    if (!buf)
+      return;
+    cdxa_parse->data_size = GUINT32_FROM_LE (*((guint32 *)buf));
+
+    /* flush the data size */
+    if (!gst_bytestream_flush (cdxa_parse->bs, 4))
+      return;
+
+    if (cdxa_parse->data_size % CDXA_SECTOR_SIZE)
+      g_warning ("cdxa_parse: size not multiple of %d bytes", CDXA_SECTOR_SIZE);
+
+    cdxa_parse->sectors = cdxa_parse->data_size / CDXA_SECTOR_SIZE;
+    
+    cdxa_parse->state = CDXA_PARSE_DATA;
+  }
+  else {
+    GstBuffer *buf;
+    GstBuffer *outbuf;
+
+    buf = gst_bytestream_read (cdxa_parse->bs, CDXA_SECTOR_SIZE);
+    if (!buf) {
+      gst_cdxa_parse_handle_event (cdxa_parse);
+      return;
+    }
+
+    outbuf = gst_buffer_create_sub (buf, 24, CDXA_DATA_SIZE);
+    gst_buffer_unref (buf);
+
+    gst_pad_push (cdxa_parse->srcpad, outbuf);
+  }
+}
+
+static GstElementStateReturn
+gst_cdxa_parse_change_state (GstElement *element)
+{
+  GstCDXAParse *cdxa_parse = GST_CDXA_PARSE (element);
+
+  switch (GST_STATE_TRANSITION (element)) {
+    case GST_STATE_NULL_TO_READY:
+      break;
+    case GST_STATE_READY_TO_PAUSED:
+      cdxa_parse->state = CDXA_PARSE_HEADER;
+      cdxa_parse->bs = gst_bytestream_new (cdxa_parse->sinkpad);
+      break;
+    case GST_STATE_PAUSED_TO_PLAYING:
+      break;
+    case GST_STATE_PLAYING_TO_PAUSED:
+      break;
+    case GST_STATE_PAUSED_TO_READY:
+      gst_bytestream_destroy (cdxa_parse->bs);
+      break;
+    case GST_STATE_READY_TO_NULL:
+      break;
+    default:
+      break;
+  }
+
+  parent_class->change_state (element);
+
+  return GST_STATE_SUCCESS;
+}
+
+static gboolean
+plugin_init (GModule *module, GstPlugin *plugin)
+{
+  GstElementFactory *factory;
+  GstTypeFactory *type;
+
+  /* this filter needs the riff parser */
+  if (!gst_library_load ("gstbytestream")) {
+    gst_info("cdxaparse: could not load support library: 'gstbytestream'\n");
+    return FALSE;
+  }
+
+  /* create an elementfactory for the cdxa_parse element */
+  factory = gst_element_factory_new ("cdxaparse", GST_TYPE_CDXA_PARSE,
+                                    &gst_cdxa_parse_details);
+  g_return_val_if_fail (factory != NULL, FALSE);
+
+  gst_element_factory_add_pad_template (factory, GST_PAD_TEMPLATE_GET (src_templ));
+  gst_element_factory_add_pad_template (factory, GST_PAD_TEMPLATE_GET (sink_templ));
+
+  type = gst_type_factory_new (&cdxadefinition);
+  gst_plugin_add_feature (plugin, GST_PLUGIN_FEATURE (type));
+
+  gst_plugin_add_feature (plugin, GST_PLUGIN_FEATURE (factory));
+
+  return TRUE;
+}
+
+GstPluginDesc plugin_desc = {
+  GST_VERSION_MAJOR,
+  GST_VERSION_MINOR,
+  "cdxaparse",
+  plugin_init
+};
+