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/* Gstreamer
* Copyright (C) <2011> Intel
* 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., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#ifndef __PARSER_UTILS__
#define __PARSER_UTILS__
#include <gst/gst.h>
#include <gst/base/gstbitreader.h>
/* Parsing utils */
#define GET_BITS(b, num, bits) G_STMT_START { \
if (!gst_bit_reader_get_bits_uint32(b, bits, num)) \
goto failed; \
GST_TRACE ("parsed %d bits: %d", num, *(bits)); \
} G_STMT_END
#define CHECK_ALLOWED(val, min, max) G_STMT_START { \
if (val < min || val > max) { \
GST_WARNING ("value not in allowed range. value: %d, range %d-%d", \
val, min, max); \
goto failed; \
} \
} G_STMT_END
#define READ_UINT8(reader, val, nbits) G_STMT_START { \
if (!gst_bit_reader_get_bits_uint8 (reader, &val, nbits)) { \
GST_WARNING ("failed to read uint8, nbits: %d", nbits); \
goto failed; \
} \
} G_STMT_END
#define READ_UINT16(reader, val, nbits) G_STMT_START { \
if (!gst_bit_reader_get_bits_uint16 (reader, &val, nbits)) { \
GST_WARNING ("failed to read uint16, nbits: %d", nbits); \
goto failed; \
} \
} G_STMT_END
#define READ_UINT32(reader, val, nbits) G_STMT_START { \
if (!gst_bit_reader_get_bits_uint32 (reader, &val, nbits)) { \
GST_WARNING ("failed to read uint32, nbits: %d", nbits); \
goto failed; \
} \
} G_STMT_END
#define READ_UINT64(reader, val, nbits) G_STMT_START { \
if (!gst_bit_reader_get_bits_uint64 (reader, &val, nbits)) { \
GST_WARNING ("failed to read uint64, nbits: %d", nbits); \
goto failed; \
} \
} G_STMT_END
#define U_READ_UINT8(reader, val, nbits) G_STMT_START { \
val = gst_bit_reader_get_bits_uint8_unchecked (reader, nbits); \
} G_STMT_END
#define U_READ_UINT16(reader, val, nbits) G_STMT_START { \
val = gst_bit_reader_get_bits_uint16_unchecked (reader, nbits); \
} G_STMT_END
#define U_READ_UINT32(reader, val, nbits) G_STMT_START { \
val = gst_bit_reader_get_bits_uint32_unchecked (reader, nbits); \
} G_STMT_END
#define U_READ_UINT64(reader, val, nbits) G_STMT_START { \
val = gst_bit_reader_get_bits_uint64_unchecked (reader, nbits); \
} G_STMT_END
#define SKIP(reader, nbits) G_STMT_START { \
if (!gst_bit_reader_skip (reader, nbits)) { \
GST_WARNING ("failed to skip nbits: %d", nbits); \
goto failed; \
} \
} G_STMT_END
typedef struct _VLCTable VLCTable;
struct _VLCTable
{
guint value;
guint cword;
guint cbits;
};
gboolean
decode_vlc (GstBitReader * br, guint * res, const VLCTable * table,
guint length);
#endif /* __PARSER_UTILS__ */
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