aac5773f
 hucm
功能基本完成，接口待打磨
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/*
* copyright (c) 2006 Oded Shimon <ods15@ods15.dyndns.org>
*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef AVCODEC_VORBIS_H
#define AVCODEC_VORBIS_H
#include "avcodec.h"
extern const float ff_vorbis_floor1_inverse_db_table[256];
extern const float * const ff_vorbis_vwin[8];
extern const uint8_t ff_vorbis_channel_layout_offsets[8][8];
extern const uint8_t ff_vorbis_encoding_channel_layout_offsets[8][8];
extern const uint64_t ff_vorbis_channel_layouts[9];
typedef struct vorbis_floor1_entry {
uint16_t x;
uint16_t sort;
uint16_t low;
uint16_t high;
} vorbis_floor1_entry;
int ff_vorbis_ready_floor1_list(AVCodecContext *avctx,
vorbis_floor1_entry *list, int values);
unsigned int ff_vorbis_nth_root(unsigned int x, unsigned int n); // x^(1/n)
int ff_vorbis_len2vlc(uint8_t *bits, uint32_t *codes, unsigned num);
void ff_vorbis_floor1_render_list(vorbis_floor1_entry * list, int values,
uint16_t *y_list, int *flag,
int multiplier, float * out, int samples);
void ff_vorbis_inverse_coupling(float *mag, float *ang, intptr_t blocksize);
#define ilog(i) av_log2(2*(i))
#endif /* AVCODEC_VORBIS_H */
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