2006-09-10 16:02:42 +02:00
|
|
|
/*
|
2006-09-30 20:47:15 +02:00
|
|
|
* copyright (c) 2006 Oded Shimon <ods15@ods15.dyndns.org>
|
2006-09-10 16:02:42 +02:00
|
|
|
*
|
|
|
|
* This library 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 of the License, or (at your option) any later version.
|
|
|
|
*
|
|
|
|
* This library 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 this library; if not, write to the Free Software
|
|
|
|
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
|
|
|
|
*/
|
|
|
|
|
2006-09-30 20:47:15 +02:00
|
|
|
#ifndef VORBIS_H
|
|
|
|
#define VORBIS_H
|
2005-05-17 21:02:43 +02:00
|
|
|
|
2006-10-01 15:45:17 +02:00
|
|
|
#include "avcodec.h"
|
|
|
|
|
2006-09-30 20:47:15 +02:00
|
|
|
extern const float ff_vorbis_floor1_inverse_db_table[256];
|
|
|
|
extern const float * ff_vorbis_vwin[8];
|
2005-05-17 21:02:43 +02:00
|
|
|
|
2006-10-01 13:11:30 +02:00
|
|
|
typedef struct {
|
|
|
|
uint_fast16_t x;
|
|
|
|
uint_fast16_t sort;
|
|
|
|
uint_fast16_t low;
|
|
|
|
uint_fast16_t high;
|
|
|
|
} floor1_entry_t;
|
|
|
|
|
|
|
|
void ff_vorbis_ready_floor1_list(floor1_entry_t * list, int values);
|
2006-10-01 13:59:33 +02:00
|
|
|
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, uint_fast32_t num);
|
|
|
|
|
2006-10-01 15:53:08 +02:00
|
|
|
static void attribute_unused render_line(int x0, int y0, int x1, int y1, float * buf, int n) {
|
2006-10-01 13:59:33 +02:00
|
|
|
int dy = y1 - y0;
|
|
|
|
int adx = x1 - x0;
|
|
|
|
int ady = ABS(dy);
|
|
|
|
int base = dy / adx;
|
|
|
|
int x = x0;
|
|
|
|
int y = y0;
|
|
|
|
int err = 0;
|
|
|
|
int sy;
|
|
|
|
if (dy < 0) sy = base - 1;
|
|
|
|
else sy = base + 1;
|
|
|
|
ady = ady - ABS(base) * adx;
|
|
|
|
if (x >= n) return;
|
|
|
|
buf[x] = ff_vorbis_floor1_inverse_db_table[y];
|
|
|
|
for (x = x0 + 1; x < x1; x++) {
|
|
|
|
if (x >= n) return;
|
|
|
|
err += ady;
|
|
|
|
if (err >= adx) {
|
|
|
|
err -= adx;
|
|
|
|
y += sy;
|
|
|
|
} else {
|
|
|
|
y += base;
|
|
|
|
}
|
|
|
|
buf[x] = ff_vorbis_floor1_inverse_db_table[y];
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
#define ilog(i) av_log2(2*(i))
|
2006-10-01 13:11:30 +02:00
|
|
|
|
2006-09-30 20:47:15 +02:00
|
|
|
#endif
|