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6d2d327c RK |
1 | /* |
2 | * This file is part of DisOrder | |
3 | * Copyright (C) 2007 Richard Kettlewell | |
4 | * | |
5 | * This program is free software; you can redistribute it and/or modify | |
6 | * it under the terms of the GNU General Public License as published by | |
7 | * the Free Software Foundation; either version 2 of the License, or | |
8 | * (at your option) any later version. | |
9 | * | |
10 | * This program is distributed in the hope that it will be useful, but | |
11 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
13 | * General Public License for more details. | |
14 | * | |
15 | * You should have received a copy of the GNU General Public License | |
16 | * along with this program; if not, write to the Free Software | |
17 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 | |
18 | * USA | |
19 | */ | |
717ba987 | 20 | /** @file server/normalize.c |
6d2d327c RK |
21 | * @brief Convert "raw" format output to the configured format |
22 | * | |
23 | * Currently we invoke sox even for trivial conversions such as byte-swapping. | |
24 | * Ideally we would do all conversion including resampling in this one process | |
25 | * and eliminate the dependency on sox. | |
26 | */ | |
27 | ||
28 | #include <config.h> | |
29 | #include "types.h" | |
30 | ||
0ca6d097 | 31 | #include <getopt.h> |
6d2d327c RK |
32 | #include <locale.h> |
33 | #include <errno.h> | |
34 | #include <unistd.h> | |
35 | #include <syslog.h> | |
36 | #include <string.h> | |
37 | #include <sys/types.h> | |
38 | #include <sys/wait.h> | |
39 | ||
40 | #include "syscalls.h" | |
41 | #include "log.h" | |
42 | #include "configuration.h" | |
43 | #include "speaker-protocol.h" | |
0ca6d097 | 44 | #include "defs.h" |
3fbdc96d | 45 | #include "version.h" |
0ca6d097 RK |
46 | |
47 | static const struct option options[] = { | |
48 | { "help", no_argument, 0, 'h' }, | |
49 | { "version", no_argument, 0, 'V' }, | |
50 | { "config", required_argument, 0, 'c' }, | |
51 | { "debug", no_argument, 0, 'd' }, | |
52 | { "no-debug", no_argument, 0, 'D' }, | |
53 | { "syslog", no_argument, 0, 's' }, | |
54 | { "no-syslog", no_argument, 0, 'S' }, | |
55 | { 0, 0, 0, 0 } | |
56 | }; | |
57 | ||
58 | /* display usage message and terminate */ | |
59 | static void help(void) { | |
60 | xprintf("Usage:\n" | |
61 | " disorder-normalize [OPTIONS]\n" | |
62 | "Options:\n" | |
63 | " --help, -h Display usage message\n" | |
64 | " --version, -V Display version number\n" | |
65 | " --config PATH, -c PATH Set configuration file\n" | |
66 | " --debug, -d Turn on debugging\n" | |
67 | " --[no-]syslog Force logging\n" | |
68 | "\n" | |
69 | "Audio format normalizer for DisOrder. Not intended to be run\n" | |
70 | "directly.\n"); | |
71 | xfclose(stdout); | |
72 | exit(0); | |
73 | } | |
74 | ||
6d2d327c RK |
75 | /** @brief Copy bytes from one file descriptor to another |
76 | * @param infd File descriptor read from | |
77 | * @param outfd File descriptor to write to | |
78 | * @param n Number of bytes to copy | |
79 | */ | |
80 | static void copy(int infd, int outfd, size_t n) { | |
62234e45 | 81 | char buffer[4096]; |
82 | ssize_t written; | |
6d2d327c RK |
83 | |
84 | while(n > 0) { | |
62234e45 | 85 | const ssize_t readden = read(infd, buffer, |
86 | n > sizeof buffer ? sizeof buffer : n); | |
87 | if(readden < 0) { | |
6d2d327c RK |
88 | if(errno == EINTR) |
89 | continue; | |
90 | else | |
91 | fatal(errno, "read error"); | |
92 | } | |
62234e45 | 93 | if(readden == 0) |
6d2d327c | 94 | fatal(0, "unexpected EOF"); |
62234e45 | 95 | n -= readden; |
96 | written = 0; | |
97 | while(written < readden) { | |
98 | const ssize_t w = write(outfd, buffer + written, readden - written); | |
6d2d327c RK |
99 | if(w < 0) |
100 | fatal(errno, "write error"); | |
62234e45 | 101 | written += w; |
6d2d327c RK |
102 | } |
103 | } | |
104 | } | |
105 | ||
106 | static void soxargs(const char ***pp, char **qq, | |
107 | const struct stream_header *header) { | |
108 | *(*pp)++ = "-t.raw"; | |
109 | *(*pp)++ = "-s"; | |
110 | *qq += sprintf((char *)(*(*pp)++ = *qq), "-r%d", header->rate) + 1; | |
111 | *qq += sprintf((char *)(*(*pp)++ = *qq), "-c%d", header->channels) + 1; | |
112 | /* sox 12.17.9 insists on -b etc; CVS sox insists on -<n> etc; both are | |
113 | * deployed! */ | |
114 | switch(config->sox_generation) { | |
115 | case 0: | |
116 | if(header->bits != 8 | |
117 | && header->endian != ENDIAN_NATIVE) | |
118 | *(*pp)++ = "-x"; | |
119 | switch(header->bits) { | |
120 | case 8: *(*pp)++ = "-b"; break; | |
121 | case 16: *(*pp)++ = "-w"; break; | |
122 | case 32: *(*pp)++ = "-l"; break; | |
123 | case 64: *(*pp)++ = "-d"; break; | |
124 | default: fatal(0, "cannot handle sample size %d", header->bits); | |
125 | } | |
126 | break; | |
127 | case 1: | |
128 | if(header->bits != 8 | |
129 | && header->endian != ENDIAN_NATIVE) | |
130 | switch(header->endian) { | |
131 | case ENDIAN_BIG: *(*pp)++ = "-B"; break; | |
132 | case ENDIAN_LITTLE: *(*pp)++ = "-L"; break; | |
133 | } | |
134 | if(header->bits % 8) | |
135 | fatal(0, "cannot handle sample size %d", header->bits); | |
136 | *qq += sprintf((char *)(*(*pp)++ = *qq), "-%d", header->bits / 8) + 1; | |
137 | break; | |
138 | default: | |
139 | fatal(0, "unknown sox_generation %ld", config->sox_generation); | |
140 | } | |
141 | } | |
142 | ||
143 | int main(int argc, char attribute((unused)) **argv) { | |
144 | struct stream_header header, latest_format; | |
0ca6d097 | 145 | int n, p[2], outfd = -1, logsyslog = !isatty(2); |
6d2d327c RK |
146 | pid_t pid = -1; |
147 | ||
148 | set_progname(argv); | |
149 | if(!setlocale(LC_CTYPE, "")) | |
150 | fatal(errno, "error calling setlocale"); | |
0ca6d097 RK |
151 | while((n = getopt_long(argc, argv, "hVc:dDSs", options, 0)) >= 0) { |
152 | switch(n) { | |
153 | case 'h': help(); | |
3fbdc96d | 154 | case 'V': version("disorder-normalize"); |
0ca6d097 RK |
155 | case 'c': configfile = optarg; break; |
156 | case 'd': debugging = 1; break; | |
157 | case 'D': debugging = 0; break; | |
158 | case 'S': logsyslog = 0; break; | |
159 | case 's': logsyslog = 1; break; | |
160 | default: fatal(0, "invalid option"); | |
161 | } | |
162 | } | |
c00fce3a | 163 | if(config_read(1)) |
6d2d327c | 164 | fatal(0, "cannot read configuration"); |
0ca6d097 | 165 | if(logsyslog) { |
6d2d327c RK |
166 | openlog(progname, LOG_PID, LOG_DAEMON); |
167 | log_default = &log_syslog; | |
168 | } | |
169 | memset(&latest_format, 0, sizeof latest_format); | |
170 | for(;;) { | |
e7fd1612 RK |
171 | n = 0; |
172 | while((size_t)n < sizeof header) { | |
173 | int r = read(0, (char *)&header + n, sizeof header - n); | |
174 | ||
175 | if(r < 0) { | |
176 | if(errno != EINTR) | |
177 | fatal(errno, "error reading header"); | |
e99d42b1 | 178 | } else if(r == 0) { |
179 | if(n) | |
180 | fatal(0, "EOF reading header"); | |
181 | break; | |
182 | } else | |
e7fd1612 RK |
183 | n += r; |
184 | } | |
24fc5e58 | 185 | if(!n) |
186 | break; | |
6d2d327c RK |
187 | /* Sanity check the header */ |
188 | if(header.rate < 100 || header.rate > 1000000) | |
189 | fatal(0, "implausible rate %"PRId32"Hz (%#"PRIx32")", | |
190 | header.rate, header.rate); | |
191 | if(header.channels < 1 || header.channels > 2) | |
192 | fatal(0, "unsupported channel count %d", header.channels); | |
193 | if(header.bits % 8 || !header.bits || header.bits > 64) | |
194 | fatal(0, "unsupported sample size %d bits", header.bits); | |
195 | if(header.endian != ENDIAN_BIG && header.endian != ENDIAN_LITTLE) | |
196 | fatal(0, "unsupported byte order %x", header.bits); | |
197 | /* Skip empty chunks regardless of their alleged format */ | |
198 | if(header.nbytes == 0) | |
199 | continue; | |
200 | /* If the format has changed we stop/start the converter */ | |
201 | if(!formats_equal(&header, &latest_format)) { | |
202 | if(pid != -1) { | |
203 | /* There's a running converter, stop it */ | |
204 | xclose(outfd); | |
205 | if(waitpid(pid, &n, 0) < 0) | |
206 | fatal(errno, "error calling waitpid"); | |
207 | if(n) | |
208 | fatal(0, "sox failed: %#x", n); | |
209 | pid = -1; | |
210 | outfd = -1; | |
211 | } | |
212 | if(!formats_equal(&header, &config->sample_format)) { | |
213 | const char *av[32], **pp = av; | |
214 | char argbuf[1024], *q = argbuf; | |
215 | ||
216 | /* Input format doesn't match target, need to start a converter */ | |
217 | *pp++ = "sox"; | |
218 | soxargs(&pp, &q, &header); | |
219 | *pp++ = "-"; /* stdin */ | |
220 | soxargs(&pp, &q, &config->sample_format); | |
221 | *pp++ = "-"; /* stdout */ | |
222 | *pp = 0; | |
223 | /* This pipe will be sox's stdin */ | |
224 | xpipe(p); | |
225 | if(!(pid = xfork())) { | |
226 | exitfn = _exit; | |
227 | xdup2(p[0], 0); | |
228 | xclose(p[0]); | |
229 | xclose(p[1]); | |
230 | execvp(av[0], (char **)av); | |
231 | fatal(errno, "sox"); | |
232 | } | |
233 | xclose(p[0]); | |
234 | outfd = p[1]; | |
235 | } else | |
236 | /* Input format matches output, can just copy bytes */ | |
237 | outfd = 1; | |
238 | /* Remember current format for next iteration */ | |
239 | latest_format = header; | |
240 | } | |
241 | /* Convert or copy this chunk */ | |
242 | copy(0, outfd, header.nbytes); | |
243 | } | |
244 | if(outfd != -1) | |
245 | xclose(outfd); | |
60432d3d RK |
246 | if(pid != -1) { |
247 | /* There's still a converter running */ | |
248 | if(waitpid(pid, &n, 0) < 0) | |
249 | fatal(errno, "error calling waitpid"); | |
250 | if(n) | |
251 | fatal(0, "sox failed: %#x", n); | |
252 | } | |
6d2d327c RK |
253 | return 0; |
254 | } | |
255 | ||
256 | /* | |
257 | Local Variables: | |
258 | c-basic-offset:2 | |
259 | comment-column:40 | |
260 | fill-column:79 | |
261 | indent-tabs-mode:nil | |
262 | End: | |
263 | */ |