Imported Debian version 2.5.3~trusty1
[deb_ffmpeg.git] / ffmpeg / libavcodec / wavpack.h
CommitLineData
2ba45a60
DM
1/*
2 * WavPack decoder/encoder common code
3 * Copyright (c) 2006,2011 Konstantin Shishkov
4 *
5 * This file is part of FFmpeg.
6 *
7 * FFmpeg is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
11 *
12 * FFmpeg is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
16 *
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with FFmpeg; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20 */
21
22#ifndef AVCODEC_WAVPACK_H
23#define AVCODEC_WAVPACK_H
24
25#include "libavutil/common.h"
26
27#define MAX_TERMS 16
28#define MAX_TERM 8
29
30#define WV_HEADER_SIZE 32
31
32#define WV_MONO 0x00000004
33#define WV_JOINT_STEREO 0x00000010
34#define WV_CROSS_DECORR 0x00000020
35#define WV_FLOAT_DATA 0x00000080
36#define WV_INT32_DATA 0x00000100
37#define WV_FALSE_STEREO 0x40000000
38
39#define WV_HYBRID_MODE 0x00000008
40#define WV_HYBRID_SHAPE 0x00000008
41#define WV_HYBRID_BITRATE 0x00000200
42#define WV_HYBRID_BALANCE 0x00000400
43#define WV_INITIAL_BLOCK 0x00000800
44#define WV_FINAL_BLOCK 0x00001000
45
46#define WV_MONO_DATA (WV_MONO | WV_FALSE_STEREO)
47
48#define WV_SINGLE_BLOCK (WV_INITIAL_BLOCK | WV_FINAL_BLOCK)
49
50#define WV_FLT_SHIFT_ONES 0x01
51#define WV_FLT_SHIFT_SAME 0x02
52#define WV_FLT_SHIFT_SENT 0x04
53#define WV_FLT_ZERO_SENT 0x08
54#define WV_FLT_ZERO_SIGN 0x10
55
56#define WV_MAX_SAMPLES 150000
57
58enum WP_ID_Flags {
59 WP_IDF_MASK = 0x3F,
60 WP_IDF_IGNORE = 0x20,
61 WP_IDF_ODD = 0x40,
62 WP_IDF_LONG = 0x80
63};
64
65enum WP_ID {
66 WP_ID_DUMMY = 0,
67 WP_ID_ENCINFO,
68 WP_ID_DECTERMS,
69 WP_ID_DECWEIGHTS,
70 WP_ID_DECSAMPLES,
71 WP_ID_ENTROPY,
72 WP_ID_HYBRID,
73 WP_ID_SHAPING,
74 WP_ID_FLOATINFO,
75 WP_ID_INT32INFO,
76 WP_ID_DATA,
77 WP_ID_CORR,
78 WP_ID_EXTRABITS,
79 WP_ID_CHANINFO,
80 WP_ID_SAMPLE_RATE = 0x27,
81};
82
83typedef struct Decorr {
84 int delta;
85 int value;
86 int weightA;
87 int weightB;
88 int samplesA[MAX_TERM];
89 int samplesB[MAX_TERM];
90 int sumA;
91 int sumB;
92} Decorr;
93
94typedef struct WvChannel {
95 int median[3];
96 int slow_level, error_limit;
97 int bitrate_acc, bitrate_delta;
98} WvChannel;
99
100// macros for manipulating median values
101#define GET_MED(n) ((c->median[n] >> 4) + 1)
102#define DEC_MED(n) c->median[n] -= ((c->median[n] + (128 >> (n)) - 2) / (128 >> (n))) * 2
103#define INC_MED(n) c->median[n] += ((c->median[n] + (128 >> (n)) ) / (128 >> (n))) * 5
104
105// macros for applying weight
106#define UPDATE_WEIGHT_CLIP(weight, delta, samples, in) \
107 if (samples && in) { \
108 if ((samples ^ in) < 0) { \
109 weight -= delta; \
110 if (weight < -1024) \
111 weight = -1024; \
112 } else { \
113 weight += delta; \
114 if (weight > 1024) \
115 weight = 1024; \
116 } \
117 }
118
119static const int wv_rates[16] = {
120 6000, 8000, 9600, 11025, 12000, 16000, 22050, 24000,
121 32000, 44100, 48000, 64000, 88200, 96000, 192000, 0
122};
123
124// exponent table copied from WavPack source
125static const uint8_t wp_exp2_table[256] = {
126 0x00, 0x01, 0x01, 0x02, 0x03, 0x03, 0x04, 0x05, 0x06, 0x06, 0x07, 0x08, 0x08, 0x09, 0x0a, 0x0b,
127 0x0b, 0x0c, 0x0d, 0x0e, 0x0e, 0x0f, 0x10, 0x10, 0x11, 0x12, 0x13, 0x13, 0x14, 0x15, 0x16, 0x16,
128 0x17, 0x18, 0x19, 0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1d, 0x1e, 0x1f, 0x20, 0x20, 0x21, 0x22, 0x23,
129 0x24, 0x24, 0x25, 0x26, 0x27, 0x28, 0x28, 0x29, 0x2a, 0x2b, 0x2c, 0x2c, 0x2d, 0x2e, 0x2f, 0x30,
130 0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x35, 0x36, 0x37, 0x38, 0x39, 0x3a, 0x3a, 0x3b, 0x3c, 0x3d,
131 0x3e, 0x3f, 0x40, 0x41, 0x41, 0x42, 0x43, 0x44, 0x45, 0x46, 0x47, 0x48, 0x48, 0x49, 0x4a, 0x4b,
132 0x4c, 0x4d, 0x4e, 0x4f, 0x50, 0x51, 0x51, 0x52, 0x53, 0x54, 0x55, 0x56, 0x57, 0x58, 0x59, 0x5a,
133 0x5b, 0x5c, 0x5d, 0x5e, 0x5e, 0x5f, 0x60, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67, 0x68, 0x69,
134 0x6a, 0x6b, 0x6c, 0x6d, 0x6e, 0x6f, 0x70, 0x71, 0x72, 0x73, 0x74, 0x75, 0x76, 0x77, 0x78, 0x79,
135 0x7a, 0x7b, 0x7c, 0x7d, 0x7e, 0x7f, 0x80, 0x81, 0x82, 0x83, 0x84, 0x85, 0x87, 0x88, 0x89, 0x8a,
136 0x8b, 0x8c, 0x8d, 0x8e, 0x8f, 0x90, 0x91, 0x92, 0x93, 0x95, 0x96, 0x97, 0x98, 0x99, 0x9a, 0x9b,
137 0x9c, 0x9d, 0x9f, 0xa0, 0xa1, 0xa2, 0xa3, 0xa4, 0xa5, 0xa6, 0xa8, 0xa9, 0xaa, 0xab, 0xac, 0xad,
138 0xaf, 0xb0, 0xb1, 0xb2, 0xb3, 0xb4, 0xb6, 0xb7, 0xb8, 0xb9, 0xba, 0xbc, 0xbd, 0xbe, 0xbf, 0xc0,
139 0xc2, 0xc3, 0xc4, 0xc5, 0xc6, 0xc8, 0xc9, 0xca, 0xcb, 0xcd, 0xce, 0xcf, 0xd0, 0xd2, 0xd3, 0xd4,
140 0xd6, 0xd7, 0xd8, 0xd9, 0xdb, 0xdc, 0xdd, 0xde, 0xe0, 0xe1, 0xe2, 0xe4, 0xe5, 0xe6, 0xe8, 0xe9,
141 0xea, 0xec, 0xed, 0xee, 0xf0, 0xf1, 0xf2, 0xf4, 0xf5, 0xf6, 0xf8, 0xf9, 0xfa, 0xfc, 0xfd, 0xff
142};
143
144static const uint8_t wp_log2_table [] = {
145 0x00, 0x01, 0x03, 0x04, 0x06, 0x07, 0x09, 0x0a, 0x0b, 0x0d, 0x0e, 0x10, 0x11, 0x12, 0x14, 0x15,
146 0x16, 0x18, 0x19, 0x1a, 0x1c, 0x1d, 0x1e, 0x20, 0x21, 0x22, 0x24, 0x25, 0x26, 0x28, 0x29, 0x2a,
147 0x2c, 0x2d, 0x2e, 0x2f, 0x31, 0x32, 0x33, 0x34, 0x36, 0x37, 0x38, 0x39, 0x3b, 0x3c, 0x3d, 0x3e,
148 0x3f, 0x41, 0x42, 0x43, 0x44, 0x45, 0x47, 0x48, 0x49, 0x4a, 0x4b, 0x4d, 0x4e, 0x4f, 0x50, 0x51,
149 0x52, 0x54, 0x55, 0x56, 0x57, 0x58, 0x59, 0x5a, 0x5c, 0x5d, 0x5e, 0x5f, 0x60, 0x61, 0x62, 0x63,
150 0x64, 0x66, 0x67, 0x68, 0x69, 0x6a, 0x6b, 0x6c, 0x6d, 0x6e, 0x6f, 0x70, 0x71, 0x72, 0x74, 0x75,
151 0x76, 0x77, 0x78, 0x79, 0x7a, 0x7b, 0x7c, 0x7d, 0x7e, 0x7f, 0x80, 0x81, 0x82, 0x83, 0x84, 0x85,
152 0x86, 0x87, 0x88, 0x89, 0x8a, 0x8b, 0x8c, 0x8d, 0x8e, 0x8f, 0x90, 0x91, 0x92, 0x93, 0x94, 0x95,
153 0x96, 0x97, 0x98, 0x99, 0x9a, 0x9b, 0x9b, 0x9c, 0x9d, 0x9e, 0x9f, 0xa0, 0xa1, 0xa2, 0xa3, 0xa4,
154 0xa5, 0xa6, 0xa7, 0xa8, 0xa9, 0xa9, 0xaa, 0xab, 0xac, 0xad, 0xae, 0xaf, 0xb0, 0xb1, 0xb2, 0xb2,
155 0xb3, 0xb4, 0xb5, 0xb6, 0xb7, 0xb8, 0xb9, 0xb9, 0xba, 0xbb, 0xbc, 0xbd, 0xbe, 0xbf, 0xc0, 0xc0,
156 0xc1, 0xc2, 0xc3, 0xc4, 0xc5, 0xc6, 0xc6, 0xc7, 0xc8, 0xc9, 0xca, 0xcb, 0xcb, 0xcc, 0xcd, 0xce,
157 0xcf, 0xd0, 0xd0, 0xd1, 0xd2, 0xd3, 0xd4, 0xd4, 0xd5, 0xd6, 0xd7, 0xd8, 0xd8, 0xd9, 0xda, 0xdb,
158 0xdc, 0xdc, 0xdd, 0xde, 0xdf, 0xe0, 0xe0, 0xe1, 0xe2, 0xe3, 0xe4, 0xe4, 0xe5, 0xe6, 0xe7, 0xe7,
159 0xe8, 0xe9, 0xea, 0xea, 0xeb, 0xec, 0xed, 0xee, 0xee, 0xef, 0xf0, 0xf1, 0xf1, 0xf2, 0xf3, 0xf4,
160 0xf4, 0xf5, 0xf6, 0xf7, 0xf7, 0xf8, 0xf9, 0xf9, 0xfa, 0xfb, 0xfc, 0xfc, 0xfd, 0xfe, 0xff, 0xff
161};
162
163static av_always_inline int wp_exp2(int16_t val)
164{
165 int res, neg = 0;
166
167 if (val < 0) {
168 val = -val;
169 neg = 1;
170 }
171
172 res = wp_exp2_table[val & 0xFF] | 0x100;
173 val >>= 8;
174 res = (val > 9) ? (res << (val - 9)) : (res >> (9 - val));
175 return neg ? -res : res;
176}
177
178static av_always_inline int wp_log2(int32_t val)
179{
180 int bits;
181
182 if (!val)
183 return 0;
184 if (val == 1)
185 return 256;
186 val += val >> 9;
187 bits = av_log2(val) + 1;
188 if (bits < 9)
189 return (bits << 8) + wp_log2_table[(val << (9 - bits)) & 0xFF];
190 else
191 return (bits << 8) + wp_log2_table[(val >> (bits - 9)) & 0xFF];
192}
193
194#endif /* AVCODEC_WAVPACK_H */