gstreamer/subprojects/gst-plugins-bad/gst-libs/gst/codecparsers/parserutils.c

60 lines
1.6 KiB
C

/* Gstreamer
* Copyright (C) <2011> Intel Corporation
* Copyright (C) <2011> Collabora Ltd.
* Copyright (C) <2011> Thibault Saunier <thibault.saunier@collabora.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., 51 Franklin St, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "parserutils.h"
gboolean
decode_vlc (GstBitReader * br, guint * res, const VLCTable * table,
guint length)
{
guint8 i;
guint cbits = 0;
guint32 value = 0;
for (i = 0; i < length; i++) {
if (cbits != table[i].cbits) {
cbits = table[i].cbits;
if (!gst_bit_reader_peek_bits_uint32 (br, &value, cbits)) {
goto failed;
}
}
if (value == table[i].cword) {
SKIP (br, cbits);
if (res)
*res = table[i].value;
return TRUE;
}
}
GST_DEBUG ("Did not find code");
failed:
{
GST_WARNING ("Could not decode VLC returning");
return FALSE;
}
}