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ffmpeg / libavcodec / vorbis.h @ 3da11804

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/*
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 * copyright (c) 2006 Oded Shimon <ods15@ods15.dyndns.org>
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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_VORBIS_H
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#define AVCODEC_VORBIS_H
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#include "avcodec.h"
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extern const float ff_vorbis_floor1_inverse_db_table[256];
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extern const float * const ff_vorbis_vwin[8];
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extern const uint8_t ff_vorbis_channel_layout_offsets[8][8];
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extern const int64_t ff_vorbis_channel_layouts[9];
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typedef struct {
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    uint_fast16_t x;
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    uint_fast16_t sort;
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    uint_fast16_t low;
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    uint_fast16_t high;
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} vorbis_floor1_entry;
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void ff_vorbis_ready_floor1_list(vorbis_floor1_entry * list, int values);
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unsigned int ff_vorbis_nth_root(unsigned int x, unsigned int n); // x^(1/n)
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int ff_vorbis_len2vlc(uint8_t *bits, uint32_t *codes, uint_fast32_t num);
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void ff_vorbis_floor1_render_list(vorbis_floor1_entry * list, int values,
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                                  uint_fast16_t * y_list, int * flag,
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                                  int multiplier, float * out, int samples);
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void vorbis_inverse_coupling(float *mag, float *ang, int blocksize);
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#define ilog(i) av_log2(2*(i))
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#endif /* AVCODEC_VORBIS_H */