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 |
|
|
#define WV_DSD_DATA 0x80000000 |
39 |
|
|
|
40 |
|
|
#define WV_HYBRID_MODE 0x00000008 |
41 |
|
|
#define WV_HYBRID_SHAPE 0x00000008 |
42 |
|
|
#define WV_HYBRID_BITRATE 0x00000200 |
43 |
|
|
#define WV_HYBRID_BALANCE 0x00000400 |
44 |
|
|
#define WV_INITIAL_BLOCK 0x00000800 |
45 |
|
|
#define WV_FINAL_BLOCK 0x00001000 |
46 |
|
|
|
47 |
|
|
#define WV_MONO_DATA (WV_MONO | WV_FALSE_STEREO) |
48 |
|
|
|
49 |
|
|
#define WV_SINGLE_BLOCK (WV_INITIAL_BLOCK | WV_FINAL_BLOCK) |
50 |
|
|
|
51 |
|
|
#define WV_FLT_SHIFT_ONES 0x01 |
52 |
|
|
#define WV_FLT_SHIFT_SAME 0x02 |
53 |
|
|
#define WV_FLT_SHIFT_SENT 0x04 |
54 |
|
|
#define WV_FLT_ZERO_SENT 0x08 |
55 |
|
|
#define WV_FLT_ZERO_SIGN 0x10 |
56 |
|
|
|
57 |
|
|
#define WV_MAX_SAMPLES 150000 |
58 |
|
|
|
59 |
|
|
enum WP_ID_Flags { |
60 |
|
|
WP_IDF_MASK = 0x3F, |
61 |
|
|
WP_IDF_IGNORE = 0x20, |
62 |
|
|
WP_IDF_ODD = 0x40, |
63 |
|
|
WP_IDF_LONG = 0x80 |
64 |
|
|
}; |
65 |
|
|
|
66 |
|
|
enum WP_ID { |
67 |
|
|
WP_ID_DUMMY = 0, |
68 |
|
|
WP_ID_ENCINFO, |
69 |
|
|
WP_ID_DECTERMS, |
70 |
|
|
WP_ID_DECWEIGHTS, |
71 |
|
|
WP_ID_DECSAMPLES, |
72 |
|
|
WP_ID_ENTROPY, |
73 |
|
|
WP_ID_HYBRID, |
74 |
|
|
WP_ID_SHAPING, |
75 |
|
|
WP_ID_FLOATINFO, |
76 |
|
|
WP_ID_INT32INFO, |
77 |
|
|
WP_ID_DATA, |
78 |
|
|
WP_ID_CORR, |
79 |
|
|
WP_ID_EXTRABITS, |
80 |
|
|
WP_ID_CHANINFO, |
81 |
|
|
WP_ID_DSD_DATA, |
82 |
|
|
WP_ID_SAMPLE_RATE = 0x27, |
83 |
|
|
}; |
84 |
|
|
|
85 |
|
|
typedef struct Decorr { |
86 |
|
|
int delta; |
87 |
|
|
int value; |
88 |
|
|
int weightA; |
89 |
|
|
int weightB; |
90 |
|
|
int samplesA[MAX_TERM]; |
91 |
|
|
int samplesB[MAX_TERM]; |
92 |
|
|
int sumA; |
93 |
|
|
int sumB; |
94 |
|
|
} Decorr; |
95 |
|
|
|
96 |
|
|
typedef struct WvChannel { |
97 |
|
|
int median[3]; |
98 |
|
|
int slow_level, error_limit; |
99 |
|
|
unsigned bitrate_acc, bitrate_delta; |
100 |
|
|
} WvChannel; |
101 |
|
|
|
102 |
|
|
// macros for manipulating median values |
103 |
|
|
#define GET_MED(n) ((c->median[n] >> 4) + 1) |
104 |
|
|
#define DEC_MED(n) c->median[n] -= ((int)(c->median[n] + (128U >> (n)) - 2) / (128 >> (n))) * 2U |
105 |
|
|
#define INC_MED(n) c->median[n] += ((int)(c->median[n] + (128U >> (n)) ) / (128 >> (n))) * 5U |
106 |
|
|
|
107 |
|
|
// macros for applying weight |
108 |
|
|
#define UPDATE_WEIGHT_CLIP(weight, delta, samples, in) \ |
109 |
|
|
if ((samples) && (in)) { \ |
110 |
|
|
if (((samples) ^ (in)) < 0) { \ |
111 |
|
|
(weight) -= (delta); \ |
112 |
|
|
if ((weight) < -1024) \ |
113 |
|
|
(weight) = -1024; \ |
114 |
|
|
} else { \ |
115 |
|
|
(weight) += (delta); \ |
116 |
|
|
if ((weight) > 1024) \ |
117 |
|
|
(weight) = 1024; \ |
118 |
|
|
} \ |
119 |
|
|
} |
120 |
|
|
|
121 |
|
|
static const int wv_rates[16] = { |
122 |
|
|
6000, 8000, 9600, 11025, 12000, 16000, 22050, 24000, |
123 |
|
|
32000, 44100, 48000, 64000, 88200, 96000, 192000, 0 |
124 |
|
|
}; |
125 |
|
|
|
126 |
|
|
// exponent table copied from WavPack source |
127 |
|
|
extern const uint8_t ff_wp_exp2_table[256]; |
128 |
|
|
extern const uint8_t ff_wp_log2_table[256]; |
129 |
|
|
|
130 |
|
59970739 |
static av_always_inline int wp_exp2(int16_t val) |
131 |
|
|
{ |
132 |
|
59970739 |
int res, neg = 0; |
133 |
|
|
|
134 |
✓✓ |
59970739 |
if (val < 0) { |
135 |
|
3823 |
val = -val; |
136 |
|
3823 |
neg = 1; |
137 |
|
|
} |
138 |
|
|
|
139 |
|
59970739 |
res = ff_wp_exp2_table[val & 0xFF] | 0x100; |
140 |
|
59970739 |
val >>= 8; |
141 |
✗✓ |
59970739 |
if (val > 31U) |
142 |
|
|
return INT_MIN; |
143 |
✓✓ |
59970739 |
res = (val > 9) ? (res << (val - 9)) : (res >> (9 - val)); |
144 |
✓✓ |
59970739 |
return neg ? -res : res; |
145 |
|
|
} |
146 |
|
|
|
147 |
|
59878828 |
static av_always_inline int wp_log2(uint32_t val) |
148 |
|
|
{ |
149 |
|
|
int bits; |
150 |
|
|
|
151 |
✓✓ |
59878828 |
if (!val) |
152 |
|
2356777 |
return 0; |
153 |
✓✓ |
57522051 |
if (val == 1) |
154 |
|
4010746 |
return 256; |
155 |
|
53511305 |
val += val >> 9; |
156 |
|
53511305 |
bits = av_log2(val) + 1; |
157 |
✓✓ |
53511305 |
if (bits < 9) |
158 |
|
27967183 |
return (bits << 8) + ff_wp_log2_table[(val << (9 - bits)) & 0xFF]; |
159 |
|
|
else |
160 |
|
25544122 |
return (bits << 8) + ff_wp_log2_table[(val >> (bits - 9)) & 0xFF]; |
161 |
|
|
} |
162 |
|
|
|
163 |
|
|
#endif /* AVCODEC_WAVPACK_H */ |