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1 | /* |
2 | * copyright (c) 2006 Oded Shimon <ods15@ods15.dyndns.org> | |
3 | * | |
4 | * This file is part of FFmpeg. | |
5 | * | |
6 | * FFmpeg is free software; you can redistribute it and/or | |
7 | * modify it under the terms of the GNU Lesser General Public | |
8 | * License as published by the Free Software Foundation; either | |
9 | * version 2.1 of the License, or (at your option) any later version. | |
10 | * | |
11 | * FFmpeg is distributed in the hope that it will be useful, | |
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 | |
17 | * License along with FFmpeg; if not, write to the Free Software | |
18 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | |
19 | */ | |
20 | ||
21 | #ifndef AVCODEC_VORBIS_H | |
22 | #define AVCODEC_VORBIS_H | |
23 | ||
24 | #include "avcodec.h" | |
25 | ||
26 | extern const float ff_vorbis_floor1_inverse_db_table[256]; | |
27 | extern const float * const ff_vorbis_vwin[8]; | |
28 | extern const uint8_t ff_vorbis_channel_layout_offsets[8][8]; | |
29 | extern const uint8_t ff_vorbis_encoding_channel_layout_offsets[8][8]; | |
30 | extern const uint64_t ff_vorbis_channel_layouts[9]; | |
31 | ||
32 | typedef struct vorbis_floor1_entry { | |
33 | uint16_t x; | |
34 | uint16_t sort; | |
35 | uint16_t low; | |
36 | uint16_t high; | |
37 | } vorbis_floor1_entry; | |
38 | ||
39 | int ff_vorbis_ready_floor1_list(AVCodecContext *avctx, | |
40 | vorbis_floor1_entry *list, int values); | |
41 | unsigned int ff_vorbis_nth_root(unsigned int x, unsigned int n); // x^(1/n) | |
42 | int ff_vorbis_len2vlc(uint8_t *bits, uint32_t *codes, unsigned num); | |
43 | void ff_vorbis_floor1_render_list(vorbis_floor1_entry * list, int values, | |
44 | uint16_t *y_list, int *flag, | |
45 | int multiplier, float * out, int samples); | |
46 | void ff_vorbis_inverse_coupling(float *mag, float *ang, intptr_t blocksize); | |
47 | ||
48 | #define ilog(i) av_log2(2*(i)) | |
49 | ||
50 | #endif /* AVCODEC_VORBIS_H */ |