Fix libvorbis encoding with more than 2 channels
[libav.git] / libavcodec / vorbis.h
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04d7f601 1/*
cc0ba5a5 2 * copyright (c) 2006 Oded Shimon <ods15@ods15.dyndns.org>
04d7f601 3 *
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4 * This file is part of FFmpeg.
5 *
6 * FFmpeg is free software; you can redistribute it and/or
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7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
b78e7197 9 * version 2.1 of the License, or (at your option) any later version.
04d7f601 10 *
b78e7197 11 * FFmpeg is distributed in the hope that it will be useful,
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12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
15 *
16 * You should have received a copy of the GNU Lesser General Public
b78e7197 17 * License along with FFmpeg; if not, write to the Free Software
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18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19 */
20
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21#ifndef AVCODEC_VORBIS_H
22#define AVCODEC_VORBIS_H
0bde73d9 23
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24#include "avcodec.h"
25
cc0ba5a5 26extern const float ff_vorbis_floor1_inverse_db_table[256];
cf2baeb3 27extern const float * const ff_vorbis_vwin[8];
4a27f326 28extern const uint8_t ff_vorbis_channel_layout_offsets[8][8];
9577838f 29extern const uint8_t ff_vorbis_encoding_channel_layout_offsets[8][8];
4a27f326 30extern const int64_t ff_vorbis_channel_layouts[9];
0bde73d9 31
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32typedef struct {
33 uint_fast16_t x;
34 uint_fast16_t sort;
35 uint_fast16_t low;
36 uint_fast16_t high;
05dee1b7 37} vorbis_floor1_entry;
9f963af5 38
05dee1b7 39void ff_vorbis_ready_floor1_list(vorbis_floor1_entry * list, int values);
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40unsigned int ff_vorbis_nth_root(unsigned int x, unsigned int n); // x^(1/n)
41int ff_vorbis_len2vlc(uint8_t *bits, uint32_t *codes, uint_fast32_t num);
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42void ff_vorbis_floor1_render_list(vorbis_floor1_entry * list, int values,
43 uint_fast16_t * y_list, int * flag,
44 int multiplier, float * out, int samples);
3da11804 45void vorbis_inverse_coupling(float *mag, float *ang, int blocksize);
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46
47#define ilog(i) av_log2(2*(i))
9f963af5 48
98790382 49#endif /* AVCODEC_VORBIS_H */