Added a plain copy of the bytstream code found in a52dec. it doesn't compile/work yet.

Original commit message from CVS:
Added a plain copy of the bytstream code found in a52dec.
it doesn't compile/work yet.

gst/utils/gstbytestream.c

@@ -0,0 +1,114 @@
+/* GStreamer
+ * Copyright (C) 1999,2000 Erik Walthinsen <omega@cse.ogi.edu>
+ *                    2000 Wim Taymans <wtay@chello.be>
+ *
+ * gstbytestreams.c: Utility functions: gtk_get_property stuff, etc.
+ *
+ * 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 <stdio.h>
+#include <string.h>
+
+#include "gstbytestreams.h"
+
+/**
+ * gst_bytestream_new:
+ * @pad: the pad to attach the bytstream to
+ *
+ * creates a bytestream from the given pad
+ *
+ * Returns: a new #GstByteStream object
+ */
+GstByteStream*
+gst_bytestream_new (GstPad *pad)
+{
+  GstByteStream *bs = g_new(GstByteStream, 1);
+
+  bs->pad = pad;
+  bs->data = NULL;
+  bs->size = 0;
+  bs->index = 0;
+
+  return bs;
+}
+
+void
+gst_bytestream_destroy (GstByteStream *bs)
+{
+  if (bs->data) {
+    g_free(bs->data);
+  }
+  g_free(bs);
+}
+
+static void 
+gst_bytestream_bytes_fill (GstByteStream *bs, guint64 len) 
+{
+  size_t oldlen;
+  GstBuffer *buf;
+
+  while ((bs->index + len) > bs->size) {
+    buf = gst_pad_pull(bs->pad);
+    oldlen = bs->size - bs->index;
+    memmove(bs->data, bs->data + bs->index, oldlen);
+    bs->size = oldlen + GST_BUFFER_SIZE(buf);
+    bs->index = 0;
+    bs->data = realloc(bs->data, bs->size);
+    if (!bs->data) {
+      fprintf(stderr, "realloc failed: d:%p s:%d\n", bs->data, bs->size);
+    }
+    memcpy(bs->data + oldlen, GST_BUFFER_DATA(buf), GST_BUFFER_SIZE(buf));
+  }
+  g_assert ((bs->index + len) <= bs->size);
+}
+
+guint8*
+gst_bytestream_bytes_peek (GstByteStream *bs, guint64 len)
+{
+  g_return_val_if_fail (len > 0, NULL);
+
+  gst_bytestream_bytes_fill (bs, len);
+
+  return gst_bytestream_pos (bs);
+}
+
+guint8*
+gst_bytestream_bytes_read (GstByteStream *bs, guint64 len)
+{
+  guint8 *ptr;
+
+  g_return_val_if_fail (len > 0, NULL);
+
+  gst_bytestream_bytes_fill(bs, len);
+  ptr = gst_bytestream_pos(bs);
+  bs->index += len;
+
+  return ptr;
+}
+
+gboolean
+gst_bytestream_bytes_seek (GstByteStream *bs, guint64 offset)
+{
+  return FALSE;
+}
+
+void
+gst_bytestream_bytes_flush (GstByteStream *bs, guint64 len)
+{
+  gst_bytestream_bytes_read(bs, len);
+}
+

gst/utils/gstbytestream.h

@@ -0,0 +1,56 @@
+/* GStreamer
+ * Copyright (C) 1999,2000 Erik Walthinsen <omega@cse.ogi.edu>
+ *                    2000 Wim Taymans <wtay@chello.be>
+ *
+ * gstbytestream.h: Header for various utility functions
+ *
+ * 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_BYTESTREAM_H__
+#define __GST_BYTESTREAM_H__
+
+#include <gst/gstpad.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif /* __cplusplus */
+
+typedef struct _GstByteStream GstByteStream;
+
+struct _GstByteStream 
+{
+  GstPad *pad;
+  guint8 *data;
+  guint64 size;
+  guint64 index;
+};
+
+GstByteStream*		gst_bytestream_new		(GstPad *pad);
+void			gst_bytestream_destroy		(GstByteStream *bs);
+
+guint8*			gst_bytestream_bytes_peek	(GstByteStream *bs, guint64 len);
+guint8*			gst_bytestream_bytes_read	(GstByteStream *bs, guint64 len);
+gboolean		gst_bytestream_bytes_seek	(GstByteStream *bs, guint64 offset);
+void			gst_bytestream_bytes_flush	(GstByteStream *bs, guint64 len);
+
+
+#ifdef __cplusplus
+}
+#endif /* __cplusplus */
+
+#endif /* __GST_BYTESTREAM_H__ */