2 * This file is part of DisOrder
3 * Copyright (C) 2007 Richard Kettlewell
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.
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.
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
20 /** @file server/normalize.c
21 * @brief Convert "raw" format output to the configured format
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.
37 #include <sys/types.h>
42 #include "configuration.h"
43 #include "speaker-protocol.h"
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' },
58 /* display usage message and terminate */
59 static void help(void) {
61 " disorder-normalize [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"
69 "Audio format normalizer for DisOrder. Not intended to be run\n"
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
80 static void copy(int infd
, int outfd
, size_t n
) {
85 const ssize_t readden
= read(infd
, buffer
,
86 n
> sizeof buffer ?
sizeof buffer
: n
);
91 fatal(errno
, "read error");
94 fatal(0, "unexpected EOF");
97 while(written
< readden
) {
98 const ssize_t w
= write(outfd
, buffer
+ written
, readden
- written
);
100 fatal(errno
, "write error");
106 static void soxargs(const char ***pp
, char **qq
,
107 const struct stream_header
*header
) {
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
114 switch(config
->sox_generation
) {
117 && header
->endian
!= ENDIAN_NATIVE
)
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
);
129 && header
->endian
!= ENDIAN_NATIVE
)
130 switch(header
->endian
) {
131 case ENDIAN_BIG
: *(*pp
)++ = "-B"; break;
132 case ENDIAN_LITTLE
: *(*pp
)++ = "-L"; break;
135 fatal(0, "cannot handle sample size %d", header
->bits
);
136 *qq
+= sprintf((char *)(*(*pp
)++ = *qq
), "-%d", header
->bits
/ 8) + 1;
139 fatal(0, "unknown sox_generation %ld", config
->sox_generation
);
143 int main(int argc
, char attribute((unused
)) **argv
) {
144 struct stream_header header
, latest_format
;
145 int n
, p
[2], outfd
= -1, logsyslog
= !isatty(2);
149 if(!setlocale(LC_CTYPE
, ""))
150 fatal(errno
, "error calling setlocale");
151 while((n
= getopt_long(argc
, argv
, "hVc:dDSs", options
, 0)) >= 0) {
154 case 'V': version("disorder-normalize");
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");
164 fatal(0, "cannot read configuration");
166 openlog(progname
, LOG_PID
, LOG_DAEMON
);
167 log_default
= &log_syslog
;
169 memset(&latest_format
, 0, sizeof latest_format
);
172 while((size_t)n
< sizeof header
) {
173 int r
= read(0, (char *)&header
+ n
, sizeof header
- n
);
177 fatal(errno
, "error reading header");
180 fatal(0, "EOF reading header");
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)
200 /* If the format has changed we stop/start the converter */
201 if(!formats_equal(&header
, &latest_format
)) {
203 /* There's a running converter, stop it */
205 if(waitpid(pid
, &n
, 0) < 0)
206 fatal(errno
, "error calling waitpid");
208 fatal(0, "sox failed: %#x", n
);
212 if(!formats_equal(&header
, &config
->sample_format
)) {
213 const char *av
[32], **pp
= av
;
214 char argbuf
[1024], *q
= argbuf
;
216 /* Input format doesn't match target, need to start a converter */
218 soxargs(&pp
, &q
, &header
);
219 *pp
++ = "-"; /* stdin */
220 soxargs(&pp
, &q
, &config
->sample_format
);
221 *pp
++ = "-"; /* stdout */
223 /* This pipe will be sox's stdin */
225 if(!(pid
= xfork())) {
230 execvp(av
[0], (char **)av
);
236 /* Input format matches output, can just copy bytes */
238 /* Remember current format for next iteration */
239 latest_format
= header
;
241 /* Convert or copy this chunk */
242 copy(0, outfd
, header
.nbytes
);
247 /* There's still a converter running */
248 if(waitpid(pid
, &n
, 0) < 0)
249 fatal(errno
, "error calling waitpid");
251 fatal(0, "sox failed: %#x", n
);