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1/*
2 * WMA compatible codec
3 * Copyright (c) 2002-2007 The FFmpeg Project
4 *
5 * This file is part of FFmpeg.
6 *
7 * FFmpeg is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
11 *
12 * FFmpeg is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
16 *
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with FFmpeg; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20 */
21
22#ifndef AVCODEC_WMA_H
23#define AVCODEC_WMA_H
24
25#include "ffmpeg_get_bits.h"
26#include "ffmpeg_put_bits.h"
27
28#define WMAPRO_FRACT (17)
29#define WMAPRO_DSP_SAMPLE_DEPTH (WMAPRO_FRACT + 8)
30
31/* size of blocks */
32#define BLOCK_MIN_BITS 7
33#define BLOCK_MAX_BITS 11
34#define BLOCK_MAX_SIZE (1 << BLOCK_MAX_BITS)
35
36#define BLOCK_NB_SIZES (BLOCK_MAX_BITS - BLOCK_MIN_BITS + 1)
37
38/* XXX: find exact max size */
39#define HIGH_BAND_MAX_SIZE 16
40
41#define NB_LSP_COEFS 10
42
43/* XXX: is it a suitable value ? */
44#define MAX_CODED_SUPERFRAME_SIZE 16384
45
46#define MAX_CHANNELS 2
47
48#define NOISE_TAB_SIZE 8192
49
50#define LSP_POW_BITS 7
51
52//FIXME should be in wmadec
53#define VLCBITS 9
54#define VLCMAX ((22+VLCBITS-1)/VLCBITS)
55
56typedef struct CoefVLCTable {
57 int n; ///< total number of codes
58 int max_level;
59 const uint32_t *huffcodes; ///< VLC bit values
60 const uint8_t *huffbits; ///< VLC bit size
61 const uint16_t *levels; ///< table to build run/level tables
62} CoefVLCTable;
63
64
65int ff_wma_get_frame_len_bits(int sample_rate, int version,
66 unsigned int decode_flags);
67unsigned int ff_wma_get_large_val(GetBitContext* gb);
68int ff_wma_run_level_decode(GetBitContext* gb,
69 VLC *vlc,
70 const int32_t *level_table, const uint16_t *run_table,
71 int version, int32_t *ptr, int offset,
72 int num_coefs, int block_len, int frame_len_bits,
73 int coef_nb_bits);
74
75#endif /* AVCODEC_WMA_H */