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6d2d327c RK |
1 | /* |
2 | * This file is part of DisOrder | |
5aff007d | 3 | * Copyright (C) 2007, 2008 Richard Kettlewell |
6d2d327c RK |
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 | ||
05b75f8d | 28 | #include "disorder-server.h" |
0ca6d097 RK |
29 | |
30 | static const struct option options[] = { | |
31 | { "help", no_argument, 0, 'h' }, | |
32 | { "version", no_argument, 0, 'V' }, | |
33 | { "config", required_argument, 0, 'c' }, | |
34 | { "debug", no_argument, 0, 'd' }, | |
35 | { "no-debug", no_argument, 0, 'D' }, | |
36 | { "syslog", no_argument, 0, 's' }, | |
37 | { "no-syslog", no_argument, 0, 'S' }, | |
38 | { 0, 0, 0, 0 } | |
39 | }; | |
40 | ||
41 | /* display usage message and terminate */ | |
42 | static void help(void) { | |
43 | xprintf("Usage:\n" | |
44 | " disorder-normalize [OPTIONS]\n" | |
45 | "Options:\n" | |
46 | " --help, -h Display usage message\n" | |
47 | " --version, -V Display version number\n" | |
48 | " --config PATH, -c PATH Set configuration file\n" | |
49 | " --debug, -d Turn on debugging\n" | |
50 | " --[no-]syslog Force logging\n" | |
51 | "\n" | |
52 | "Audio format normalizer for DisOrder. Not intended to be run\n" | |
53 | "directly.\n"); | |
54 | xfclose(stdout); | |
55 | exit(0); | |
56 | } | |
57 | ||
6d2d327c RK |
58 | /** @brief Copy bytes from one file descriptor to another |
59 | * @param infd File descriptor read from | |
60 | * @param outfd File descriptor to write to | |
61 | * @param n Number of bytes to copy | |
62 | */ | |
63 | static void copy(int infd, int outfd, size_t n) { | |
62234e45 | 64 | char buffer[4096]; |
65 | ssize_t written; | |
6d2d327c RK |
66 | |
67 | while(n > 0) { | |
62234e45 | 68 | const ssize_t readden = read(infd, buffer, |
69 | n > sizeof buffer ? sizeof buffer : n); | |
70 | if(readden < 0) { | |
6d2d327c RK |
71 | if(errno == EINTR) |
72 | continue; | |
73 | else | |
74 | fatal(errno, "read error"); | |
75 | } | |
62234e45 | 76 | if(readden == 0) |
6d2d327c | 77 | fatal(0, "unexpected EOF"); |
62234e45 | 78 | n -= readden; |
79 | written = 0; | |
80 | while(written < readden) { | |
81 | const ssize_t w = write(outfd, buffer + written, readden - written); | |
6d2d327c RK |
82 | if(w < 0) |
83 | fatal(errno, "write error"); | |
62234e45 | 84 | written += w; |
6d2d327c RK |
85 | } |
86 | } | |
87 | } | |
88 | ||
89 | static void soxargs(const char ***pp, char **qq, | |
90 | const struct stream_header *header) { | |
91 | *(*pp)++ = "-t.raw"; | |
92 | *(*pp)++ = "-s"; | |
93 | *qq += sprintf((char *)(*(*pp)++ = *qq), "-r%d", header->rate) + 1; | |
94 | *qq += sprintf((char *)(*(*pp)++ = *qq), "-c%d", header->channels) + 1; | |
95 | /* sox 12.17.9 insists on -b etc; CVS sox insists on -<n> etc; both are | |
96 | * deployed! */ | |
97 | switch(config->sox_generation) { | |
98 | case 0: | |
99 | if(header->bits != 8 | |
100 | && header->endian != ENDIAN_NATIVE) | |
101 | *(*pp)++ = "-x"; | |
102 | switch(header->bits) { | |
103 | case 8: *(*pp)++ = "-b"; break; | |
104 | case 16: *(*pp)++ = "-w"; break; | |
105 | case 32: *(*pp)++ = "-l"; break; | |
106 | case 64: *(*pp)++ = "-d"; break; | |
107 | default: fatal(0, "cannot handle sample size %d", header->bits); | |
108 | } | |
109 | break; | |
110 | case 1: | |
111 | if(header->bits != 8 | |
112 | && header->endian != ENDIAN_NATIVE) | |
113 | switch(header->endian) { | |
114 | case ENDIAN_BIG: *(*pp)++ = "-B"; break; | |
115 | case ENDIAN_LITTLE: *(*pp)++ = "-L"; break; | |
116 | } | |
117 | if(header->bits % 8) | |
118 | fatal(0, "cannot handle sample size %d", header->bits); | |
119 | *qq += sprintf((char *)(*(*pp)++ = *qq), "-%d", header->bits / 8) + 1; | |
120 | break; | |
121 | default: | |
122 | fatal(0, "unknown sox_generation %ld", config->sox_generation); | |
123 | } | |
124 | } | |
125 | ||
126 | int main(int argc, char attribute((unused)) **argv) { | |
127 | struct stream_header header, latest_format; | |
0ca6d097 | 128 | int n, p[2], outfd = -1, logsyslog = !isatty(2); |
6d2d327c RK |
129 | pid_t pid = -1; |
130 | ||
131 | set_progname(argv); | |
132 | if(!setlocale(LC_CTYPE, "")) | |
133 | fatal(errno, "error calling setlocale"); | |
0ca6d097 RK |
134 | while((n = getopt_long(argc, argv, "hVc:dDSs", options, 0)) >= 0) { |
135 | switch(n) { | |
136 | case 'h': help(); | |
3fbdc96d | 137 | case 'V': version("disorder-normalize"); |
0ca6d097 RK |
138 | case 'c': configfile = optarg; break; |
139 | case 'd': debugging = 1; break; | |
140 | case 'D': debugging = 0; break; | |
141 | case 'S': logsyslog = 0; break; | |
142 | case 's': logsyslog = 1; break; | |
143 | default: fatal(0, "invalid option"); | |
144 | } | |
145 | } | |
c00fce3a | 146 | if(config_read(1)) |
6d2d327c | 147 | fatal(0, "cannot read configuration"); |
0ca6d097 | 148 | if(logsyslog) { |
6d2d327c RK |
149 | openlog(progname, LOG_PID, LOG_DAEMON); |
150 | log_default = &log_syslog; | |
151 | } | |
152 | memset(&latest_format, 0, sizeof latest_format); | |
153 | for(;;) { | |
e7fd1612 RK |
154 | n = 0; |
155 | while((size_t)n < sizeof header) { | |
156 | int r = read(0, (char *)&header + n, sizeof header - n); | |
157 | ||
158 | if(r < 0) { | |
159 | if(errno != EINTR) | |
160 | fatal(errno, "error reading header"); | |
e99d42b1 | 161 | } else if(r == 0) { |
162 | if(n) | |
163 | fatal(0, "EOF reading header"); | |
164 | break; | |
165 | } else | |
e7fd1612 RK |
166 | n += r; |
167 | } | |
24fc5e58 | 168 | if(!n) |
169 | break; | |
6d2d327c RK |
170 | /* Sanity check the header */ |
171 | if(header.rate < 100 || header.rate > 1000000) | |
172 | fatal(0, "implausible rate %"PRId32"Hz (%#"PRIx32")", | |
173 | header.rate, header.rate); | |
174 | if(header.channels < 1 || header.channels > 2) | |
175 | fatal(0, "unsupported channel count %d", header.channels); | |
176 | if(header.bits % 8 || !header.bits || header.bits > 64) | |
177 | fatal(0, "unsupported sample size %d bits", header.bits); | |
178 | if(header.endian != ENDIAN_BIG && header.endian != ENDIAN_LITTLE) | |
179 | fatal(0, "unsupported byte order %x", header.bits); | |
180 | /* Skip empty chunks regardless of their alleged format */ | |
181 | if(header.nbytes == 0) | |
182 | continue; | |
183 | /* If the format has changed we stop/start the converter */ | |
184 | if(!formats_equal(&header, &latest_format)) { | |
185 | if(pid != -1) { | |
186 | /* There's a running converter, stop it */ | |
187 | xclose(outfd); | |
188 | if(waitpid(pid, &n, 0) < 0) | |
189 | fatal(errno, "error calling waitpid"); | |
190 | if(n) | |
191 | fatal(0, "sox failed: %#x", n); | |
192 | pid = -1; | |
193 | outfd = -1; | |
194 | } | |
195 | if(!formats_equal(&header, &config->sample_format)) { | |
196 | const char *av[32], **pp = av; | |
197 | char argbuf[1024], *q = argbuf; | |
198 | ||
199 | /* Input format doesn't match target, need to start a converter */ | |
200 | *pp++ = "sox"; | |
201 | soxargs(&pp, &q, &header); | |
202 | *pp++ = "-"; /* stdin */ | |
203 | soxargs(&pp, &q, &config->sample_format); | |
204 | *pp++ = "-"; /* stdout */ | |
205 | *pp = 0; | |
206 | /* This pipe will be sox's stdin */ | |
207 | xpipe(p); | |
208 | if(!(pid = xfork())) { | |
209 | exitfn = _exit; | |
210 | xdup2(p[0], 0); | |
211 | xclose(p[0]); | |
212 | xclose(p[1]); | |
213 | execvp(av[0], (char **)av); | |
214 | fatal(errno, "sox"); | |
215 | } | |
216 | xclose(p[0]); | |
217 | outfd = p[1]; | |
218 | } else | |
219 | /* Input format matches output, can just copy bytes */ | |
220 | outfd = 1; | |
221 | /* Remember current format for next iteration */ | |
222 | latest_format = header; | |
223 | } | |
224 | /* Convert or copy this chunk */ | |
225 | copy(0, outfd, header.nbytes); | |
226 | } | |
227 | if(outfd != -1) | |
228 | xclose(outfd); | |
60432d3d RK |
229 | if(pid != -1) { |
230 | /* There's still a converter running */ | |
231 | if(waitpid(pid, &n, 0) < 0) | |
232 | fatal(errno, "error calling waitpid"); | |
233 | if(n) | |
234 | fatal(0, "sox failed: %#x", n); | |
235 | } | |
6d2d327c RK |
236 | return 0; |
237 | } | |
238 | ||
239 | /* | |
240 | Local Variables: | |
241 | c-basic-offset:2 | |
242 | comment-column:40 | |
243 | fill-column:79 | |
244 | indent-tabs-mode:nil | |
245 | End: | |
246 | */ |