chiark / gitweb /
examples/disorder.init.in: Read settings from `/etc/default/disorder'.
[disorder] / server / decode.c
CommitLineData
f8f8039f
RK
1/*
2 * This file is part of DisOrder
8d399b30 3 * Copyright (C) 2007-2010 Richard Kettlewell
f8f8039f 4 *
e7eb3a27 5 * This program is free software: you can redistribute it and/or modify
f8f8039f 6 * it under the terms of the GNU General Public License as published by
e7eb3a27 7 * the Free Software Foundation, either version 3 of the License, or
f8f8039f
RK
8 * (at your option) any later version.
9 *
e7eb3a27
RK
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
14 *
f8f8039f 15 * You should have received a copy of the GNU General Public License
e7eb3a27 16 * along with this program. If not, see <http://www.gnu.org/licenses/>.
f8f8039f
RK
17 */
18/** @file server/decode.c
19 * @brief General-purpose decoder for use by speaker process
20 */
8d399b30 21#include "decode.h"
f8f8039f 22
f8f8039f 23#include <mad.h>
572c2899 24#include <vorbis/vorbisfile.h>
762806f1 25
7b203d74 26#include <FLAC/stream_decoder.h>
f8f8039f 27
ce6c36be 28#include "wav.h"
f8f8039f 29
e7eb3a27 30
f8f8039f
RK
31/** @brief Encoding lookup table type */
32struct decoder {
33 /** @brief Glob pattern matching file */
34 const char *pattern;
35 /** @brief Decoder function */
36 void (*decode)(void);
37};
38
8d399b30
RK
39FILE *outputfp;
40const char *path;
41char input_buffer[INPUT_BUFFER_SIZE];
42int input_count;
75db8354 43
44/** @brief Write a block header
45 * @param rate Sample rate in Hz
46 * @param channels Channel count (currently only 1 or 2 supported)
47 * @param bits Bits per sample (must be a multiple of 8, no more than 64)
48 * @param nbytes Total number of data bytes
49 * @param endian @ref ENDIAN_BIG or @ref ENDIAN_LITTLE
50 *
51 * Checks that the sample format is a supported one (so other calls do not have
2e9ba080 52 * to) and calls disorder_fatal() on error.
f8f8039f 53 */
8d399b30
RK
54void output_header(int rate,
55 int channels,
56 int bits,
57 int nbytes,
58 int endian) {
39492555 59 struct stream_header header;
60
75db8354 61 if(bits <= 0 || bits % 8 || bits > 64)
2e9ba080
RK
62 disorder_fatal(0, "decoding %s: unsupported sample size %d bits",
63 path, bits);
75db8354 64 if(channels <= 0 || channels > 2)
2e9ba080
RK
65 disorder_fatal(0, "decoding %s: unsupported channel count %d",
66 path, channels);
75db8354 67 if(rate <= 0)
2e9ba080 68 disorder_fatal(0, "decoding %s: nonsensical sample rate %dHz", path, rate);
39492555 69 header.rate = rate;
70 header.bits = bits;
71 header.channels = channels;
ce6c36be 72 header.endian = endian;
39492555 73 header.nbytes = nbytes;
74 if(fwrite(&header, sizeof header, 1, outputfp) < 1)
2e9ba080 75 disorder_fatal(errno, "decoding %s: writing format header", path);
f8f8039f
RK
76}
77
f8f8039f
RK
78/** @brief Lookup table of decoders */
79static const struct decoder decoders[] = {
80 { "*.mp3", decode_mp3 },
81 { "*.MP3", decode_mp3 },
572c2899 82 { "*.ogg", decode_ogg },
83 { "*.OGG", decode_ogg },
75db8354 84 { "*.flac", decode_flac },
85 { "*.FLAC", decode_flac },
ce6c36be 86 { "*.wav", decode_wav },
87 { "*.WAV", decode_wav },
f8f8039f
RK
88 { 0, 0 }
89};
90
91static const struct option options[] = {
92 { "help", no_argument, 0, 'h' },
93 { "version", no_argument, 0, 'V' },
94 { 0, 0, 0, 0 }
95};
96
97/* Display usage message and terminate. */
98static void help(void) {
99 xprintf("Usage:\n"
100 " disorder-decode [OPTIONS] PATH\n"
101 "Options:\n"
102 " --help, -h Display usage message\n"
103 " --version, -V Display version number\n"
104 "\n"
105 "Audio decoder for DisOrder. Only intended to be used by speaker\n"
106 "process, not for normal users.\n");
107 xfclose(stdout);
108 exit(0);
109}
110
f8f8039f
RK
111int main(int argc, char **argv) {
112 int n;
113 const char *e;
114
115 set_progname(argv);
2e9ba080 116 if(!setlocale(LC_CTYPE, "")) disorder_fatal(errno, "calling setlocale");
f8f8039f
RK
117 while((n = getopt_long(argc, argv, "hV", options, 0)) >= 0) {
118 switch(n) {
119 case 'h': help();
3fbdc96d 120 case 'V': version("disorder-decode");
2e9ba080 121 default: disorder_fatal(0, "invalid option");
f8f8039f
RK
122 }
123 }
124 if(optind >= argc)
2e9ba080 125 disorder_fatal(0, "missing filename");
f8f8039f 126 if(optind + 1 < argc)
2e9ba080 127 disorder_fatal(0, "excess arguments");
f8f8039f
RK
128 if((e = getenv("DISORDER_RAW_FD"))) {
129 if(!(outputfp = fdopen(atoi(e), "wb")))
2e9ba080 130 disorder_fatal(errno, "fdopen");
f8f8039f
RK
131 } else
132 outputfp = stdout;
133 path = argv[optind];
134 for(n = 0;
135 decoders[n].pattern
136 && fnmatch(decoders[n].pattern, path, 0) != 0;
137 ++n)
138 ;
139 if(!decoders[n].pattern)
2e9ba080 140 disorder_fatal(0, "cannot determine file type for %s", path);
f8f8039f
RK
141 decoders[n].decode();
142 xfclose(outputfp);
143 return 0;
144}
145
146/*
147Local Variables:
148c-basic-offset:2
149comment-column:40
150fill-column:79
151indent-tabs-mode:nil
152End:
153*/