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comparison ffstools/tiaud/decomp.c @ 163:568e2a2b49c8

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tiaud-decomp utility written
author Mychaela Falconia <falcon@freecalypso.org>
date Sat, 18 Mar 2017 05:47:32 +0000
parents
children c458e33060bf
comparison
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162:ce7479d28b02 163:568e2a2b49c8
1 /*
2 * This utility decompiles a binary /aud/*.cfg file read out of FFS
3 * into our ASCII text representation.
4 */
5
6 #include <sys/types.h>
7 #include <sys/file.h>
8 #include <sys/stat.h>
9 #include <stdio.h>
10 #include <stdint.h>
11 #include <endian.h>
12 #include <stdlib.h>
13 #include <unistd.h>
14 #include "binstruct.h"
15
16 struct audio_cfg_bin bin;
17 FILE *outf;
18
19 read_bin_file(filename)
20 char *filename;
21 {
22 int fd;
23 struct stat st;
24
25 fd = open(filename, O_RDONLY);
26 if (fd < 0) {
27 perror(filename);
28 exit(1);
29 }
30 fstat(fd, &st);
31 if (!S_ISREG(st.st_mode)) {
32 fprintf(stderr, "%s is not a regular file\n", filename);
33 exit(1);
34 }
35 if (st.st_size != sizeof(struct audio_cfg_bin)) {
36 fprintf(stderr, "%s has the wrong length\n", filename);
37 exit(1);
38 }
39 read(fd, &bin, sizeof bin);
40 close(fd);
41 }
42
43 emit_fir(table)
44 uint16_t *table;
45 {
46 int i;
47
48 for (i = 0; i < 31; i++) {
49 if ((i % 8) == 0)
50 fprintf(outf, "\tfir %2d", i);
51 fprintf(outf, " 0x%04X", le16toh(table[i]));
52 if (i == 7 || i == 15 || i == 23 || i == 30)
53 putc('\n', outf);
54 }
55 }
56
57 emit_ascii()
58 {
59 int i;
60
61 fprintf(outf, "voice-path %u\n", bin.voice_path);
62
63 switch (bin.mic_mode) {
64 case AUDIO_MICROPHONE_HANDHELD:
65 fprintf(outf, "mic default {\n");
66 break;
67 case AUDIO_MICROPHONE_HANDFREE:
68 fprintf(outf, "mic aux {\n");
69 break;
70 case AUDIO_MICROPHONE_HEADSET:
71 fprintf(outf, "mic headset {\n");
72 break;
73 default:
74 fprintf(stderr, "error: unknown microphone mode 0x%02X\n",
75 bin.mic_mode);
76 exit(1);
77 }
78 fprintf(outf, "\tgain %d\n", bin.mic_bytes[0]);
79 if (bin.mic_mode == AUDIO_MICROPHONE_HANDFREE) {
80 fprintf(outf, "\textra-gain %d\n", bin.mic_bytes[1]);
81 fprintf(outf, "\toutput-bias %d\n", bin.mic_bytes[2]);
82 } else
83 fprintf(outf, "\toutput-bias %d\n", bin.mic_bytes[1]);
84 emit_fir(bin.mic_fir);
85 fputs("}\n", outf);
86
87 switch (bin.speaker_mode) {
88 case AUDIO_SPEAKER_HANDHELD:
89 fprintf(outf, "speaker ear {\n");
90 break;
91 case AUDIO_SPEAKER_HANDFREE:
92 fprintf(outf, "speaker aux {\n");
93 break;
94 case AUDIO_SPEAKER_HEADSET:
95 fprintf(outf, "speaker headset {\n");
96 break;
97 case AUDIO_SPEAKER_BUZZER:
98 fprintf(outf, "speaker buzzer {\n");
99 break;
100 case AUDIO_SPEAKER_HANDHELD_HANDFREE:
101 fprintf(outf, "speaker ear+aux {\n");
102 break;
103 default:
104 fprintf(stderr, "error: unknown speaker mode 0x%02X\n",
105 bin.speaker_mode);
106 exit(1);
107 }
108 if (bin.speaker_mode != AUDIO_SPEAKER_BUZZER) {
109 fprintf(outf, "\tgain %d\n", bin.speaker_bytes[0]);
110 fprintf(outf, "\taudio-filter %d\n", bin.speaker_bytes[1]);
111 emit_fir(bin.speaker_fir);
112 } else
113 fprintf(outf, "\tactivate %d\n", bin.speaker_bytes[0]);
114 fputs("}\n", outf);
115
116 fprintf(outf, "sidetone %d\n", bin.sidetone_gain);
117 fputs("aec", outf);
118 for (i = 0; i < 5; i++) {
119 putc(' ', outf);
120 if (bin.aec_words[i])
121 fprintf(outf, "0x%X", le16toh(bin.aec_words[i]));
122 else
123 putc('0', outf);
124 }
125 putc('\n', outf);
126 }
127
128 main(argc, argv)
129 char **argv;
130 {
131 if (argc < 2 || argc > 3) {
132 fprintf(stderr, "usage: %s infile [outfile]\n", argv[0]);
133 exit(1);
134 }
135 read_bin_file(argv[1]);
136 if (argc > 2) {
137 outf = fopen(argv[2], "w");
138 if (!outf) {
139 perror(argv[2]);
140 exit(1);
141 }
142 } else
143 outf = stdout;
144 emit_ascii();
145 exit(0);
146 }