86c3765246
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@27455 a1c6a512-1295-4272-9138-f99709370657
72 lines
2.3 KiB
C
72 lines
2.3 KiB
C
/*
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* WMA compatible codec
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* Copyright (c) 2002-2007 The FFmpeg Project
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#ifndef AVCODEC_WMA_H
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#define AVCODEC_WMA_H
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#include "ffmpeg_get_bits.h"
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#include "ffmpeg_put_bits.h"
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/* size of blocks */
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#define BLOCK_MIN_BITS 7
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#define BLOCK_MAX_BITS 11
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#define BLOCK_MAX_SIZE (1 << BLOCK_MAX_BITS)
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#define BLOCK_NB_SIZES (BLOCK_MAX_BITS - BLOCK_MIN_BITS + 1)
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/* XXX: find exact max size */
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#define HIGH_BAND_MAX_SIZE 16
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#define NB_LSP_COEFS 10
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/* XXX: is it a suitable value ? */
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#define MAX_CODED_SUPERFRAME_SIZE 16384
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#define MAX_CHANNELS 2
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#define NOISE_TAB_SIZE 8192
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#define LSP_POW_BITS 7
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//FIXME should be in wmadec
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#define VLCBITS 9
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#define VLCMAX ((22+VLCBITS-1)/VLCBITS)
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typedef struct CoefVLCTable {
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int n; ///< total number of codes
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int max_level;
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const uint32_t *huffcodes; ///< VLC bit values
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const uint8_t *huffbits; ///< VLC bit size
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const uint16_t *levels; ///< table to build run/level tables
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} CoefVLCTable;
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int ff_wma_get_frame_len_bits(int sample_rate, int version,
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unsigned int decode_flags);
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unsigned int ff_wma_get_large_val(GetBitContext* gb);
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int ff_wma_run_level_decode(GetBitContext* gb,
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VLC *vlc,
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const int32_t *level_table, const uint16_t *run_table,
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int version, int32_t *ptr, int offset,
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int num_coefs, int block_len, int frame_len_bits,
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int coef_nb_bits);
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#endif /* AVCODEC_WMA_H */
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