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comparison miscutil/pcm8-to-pcm16.c @ 232:8710c94df334

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miscutil: new program pcm8-to-pcm16
author Mychaela Falconia <falcon@freecalypso.org>
date Sun, 07 May 2023 19:03:36 +0000
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231:67cbfa0aeb1c 232:8710c94df334
1 /*
2 * This program reads an 8-bit PCM recording in either A-law or mu-law
3 * encoding (needs to be specified on the command line) and converts it
4 * to 16-bit linear PCM. Both input and output file formats are raw binary;
5 * the output format is robe by default or can be changed to LE via
6 * an additional command line argument.
7 *
8 * The expansion tables for A-law and mu-law have been generated by
9 * developer aid programs in the ../dev directory.
10 */
11
12 #include <stdio.h>
13 #include <stdint.h>
14 #include <stdlib.h>
15 #include <string.h>
16 #include <strings.h>
17
18 uint16_t pcma_decode_table[256] = {
19 60032, 60288, 59520, 59776, 61056, 61312, 60544, 60800,
20 57984, 58240, 57472, 57728, 59008, 59264, 58496, 58752,
21 62784, 62912, 62528, 62656, 63296, 63424, 63040, 63168,
22 61760, 61888, 61504, 61632, 62272, 62400, 62016, 62144,
23 43520, 44544, 41472, 42496, 47616, 48640, 45568, 46592,
24 35328, 36352, 33280, 34304, 39424, 40448, 37376, 38400,
25 54528, 55040, 53504, 54016, 56576, 57088, 55552, 56064,
26 50432, 50944, 49408, 49920, 52480, 52992, 51456, 51968,
27 65192, 65208, 65160, 65176, 65256, 65272, 65224, 65240,
28 65064, 65080, 65032, 65048, 65128, 65144, 65096, 65112,
29 65448, 65464, 65416, 65432, 65512, 65528, 65480, 65496,
30 65320, 65336, 65288, 65304, 65384, 65400, 65352, 65368,
31 64160, 64224, 64032, 64096, 64416, 64480, 64288, 64352,
32 63648, 63712, 63520, 63584, 63904, 63968, 63776, 63840,
33 64848, 64880, 64784, 64816, 64976, 65008, 64912, 64944,
34 64592, 64624, 64528, 64560, 64720, 64752, 64656, 64688,
35 5504, 5248, 6016, 5760, 4480, 4224, 4992, 4736,
36 7552, 7296, 8064, 7808, 6528, 6272, 7040, 6784,
37 2752, 2624, 3008, 2880, 2240, 2112, 2496, 2368,
38 3776, 3648, 4032, 3904, 3264, 3136, 3520, 3392,
39 22016, 20992, 24064, 23040, 17920, 16896, 19968, 18944,
40 30208, 29184, 32256, 31232, 26112, 25088, 28160, 27136,
41 11008, 10496, 12032, 11520, 8960, 8448, 9984, 9472,
42 15104, 14592, 16128, 15616, 13056, 12544, 14080, 13568,
43 344, 328, 376, 360, 280, 264, 312, 296,
44 472, 456, 504, 488, 408, 392, 440, 424,
45 88, 72, 120, 104, 24, 8, 56, 40,
46 216, 200, 248, 232, 152, 136, 184, 168,
47 1376, 1312, 1504, 1440, 1120, 1056, 1248, 1184,
48 1888, 1824, 2016, 1952, 1632, 1568, 1760, 1696,
49 688, 656, 752, 720, 560, 528, 624, 592,
50 944, 912, 1008, 976, 816, 784, 880, 848,
51 };
52
53 uint16_t pcmu_decode_table[256] = {
54 33412, 34436, 35460, 36484, 37508, 38532, 39556, 40580,
55 41604, 42628, 43652, 44676, 45700, 46724, 47748, 48772,
56 49540, 50052, 50564, 51076, 51588, 52100, 52612, 53124,
57 53636, 54148, 54660, 55172, 55684, 56196, 56708, 57220,
58 57604, 57860, 58116, 58372, 58628, 58884, 59140, 59396,
59 59652, 59908, 60164, 60420, 60676, 60932, 61188, 61444,
60 61636, 61764, 61892, 62020, 62148, 62276, 62404, 62532,
61 62660, 62788, 62916, 63044, 63172, 63300, 63428, 63556,
62 63652, 63716, 63780, 63844, 63908, 63972, 64036, 64100,
63 64164, 64228, 64292, 64356, 64420, 64484, 64548, 64612,
64 64660, 64692, 64724, 64756, 64788, 64820, 64852, 64884,
65 64916, 64948, 64980, 65012, 65044, 65076, 65108, 65140,
66 65164, 65180, 65196, 65212, 65228, 65244, 65260, 65276,
67 65292, 65308, 65324, 65340, 65356, 65372, 65388, 65404,
68 65416, 65424, 65432, 65440, 65448, 65456, 65464, 65472,
69 65480, 65488, 65496, 65504, 65512, 65520, 65528, 0,
70 32124, 31100, 30076, 29052, 28028, 27004, 25980, 24956,
71 23932, 22908, 21884, 20860, 19836, 18812, 17788, 16764,
72 15996, 15484, 14972, 14460, 13948, 13436, 12924, 12412,
73 11900, 11388, 10876, 10364, 9852, 9340, 8828, 8316,
74 7932, 7676, 7420, 7164, 6908, 6652, 6396, 6140,
75 5884, 5628, 5372, 5116, 4860, 4604, 4348, 4092,
76 3900, 3772, 3644, 3516, 3388, 3260, 3132, 3004,
77 2876, 2748, 2620, 2492, 2364, 2236, 2108, 1980,
78 1884, 1820, 1756, 1692, 1628, 1564, 1500, 1436,
79 1372, 1308, 1244, 1180, 1116, 1052, 988, 924,
80 876, 844, 812, 780, 748, 716, 684, 652,
81 620, 588, 556, 524, 492, 460, 428, 396,
82 372, 356, 340, 324, 308, 292, 276, 260,
83 244, 228, 212, 196, 180, 164, 148, 132,
84 120, 112, 104, 96, 88, 80, 72, 64,
85 56, 48, 40, 32, 24, 16, 8, 0,
86 };
87
88 main(argc, argv)
89 char **argv;
90 {
91 uint16_t *exp_table;
92 int little_endian;
93 FILE *inf, *outf;
94 int inp;
95 unsigned out;
96
97 if (argc < 4 || argc > 5) {
98 usage: fprintf(stderr,
99 "usage: %s alaw|ulaw input.pcm8 output.pcm16 [le]\n",
100 argv[0]);
101 exit(1);
102 }
103 if (!strcmp(argv[1], "alaw"))
104 exp_table = pcma_decode_table;
105 else if (!strcmp(argv[1], "ulaw"))
106 exp_table = pcmu_decode_table;
107 else
108 goto usage;
109 if (argc == 4)
110 little_endian = 0;
111 else {
112 if (strcmp(argv[4], "le"))
113 goto usage;
114 little_endian = 1;
115 }
116 inf = fopen(argv[2], "r");
117 if (!inf) {
118 perror(argv[2]);
119 exit(1);
120 }
121 outf = fopen(argv[3], "w");
122 if (!outf) {
123 perror(argv[3]);
124 exit(1);
125 }
126 for (;;) {
127 inp = getc(inf);
128 if (inp == EOF)
129 break;
130 out = exp_table[inp];
131 if (little_endian) {
132 putc(out & 0xFF, outf);
133 putc((out >> 8) & 0xFF, outf);
134 } else {
135 putc((out >> 8) & 0xFF, outf);
136 putc(out & 0xFF, outf);
137 }
138 }
139 fclose(outf);
140 exit(0);
141 }