| 1 | /* |
| 2 | * This file is part of DisOrder |
| 3 | * Copyright (C) 2007-2010 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 3 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, |
| 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 | * |
| 15 | * You should have received a copy of the GNU General Public License |
| 16 | * along with this program. If not, see <http://www.gnu.org/licenses/>. |
| 17 | */ |
| 18 | /** @file server/decode.c |
| 19 | * @brief General-purpose decoder for use by speaker process |
| 20 | */ |
| 21 | #include "decode.h" |
| 22 | |
| 23 | #include <mad.h> |
| 24 | #include <vorbis/vorbisfile.h> |
| 25 | |
| 26 | #include <FLAC/stream_decoder.h> |
| 27 | |
| 28 | #include "wav.h" |
| 29 | |
| 30 | |
| 31 | /** @brief Encoding lookup table type */ |
| 32 | struct decoder { |
| 33 | /** @brief Glob pattern matching file */ |
| 34 | const char *pattern; |
| 35 | /** @brief Decoder function */ |
| 36 | void (*decode)(void); |
| 37 | }; |
| 38 | |
| 39 | FILE *outputfp; |
| 40 | const char *path; |
| 41 | char input_buffer[INPUT_BUFFER_SIZE]; |
| 42 | int input_count; |
| 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 |
| 52 | * to) and calls disorder_fatal() on error. |
| 53 | */ |
| 54 | void output_header(int rate, |
| 55 | int channels, |
| 56 | int bits, |
| 57 | int nbytes, |
| 58 | int endian) { |
| 59 | struct stream_header header; |
| 60 | |
| 61 | if(bits <= 0 || bits % 8 || bits > 64) |
| 62 | disorder_fatal(0, "decoding %s: unsupported sample size %d bits", |
| 63 | path, bits); |
| 64 | if(channels <= 0 || channels > 2) |
| 65 | disorder_fatal(0, "decoding %s: unsupported channel count %d", |
| 66 | path, channels); |
| 67 | if(rate <= 0) |
| 68 | disorder_fatal(0, "decoding %s: nonsensical sample rate %dHz", path, rate); |
| 69 | header.rate = rate; |
| 70 | header.bits = bits; |
| 71 | header.channels = channels; |
| 72 | header.endian = endian; |
| 73 | header.nbytes = nbytes; |
| 74 | if(fwrite(&header, sizeof header, 1, outputfp) < 1) |
| 75 | disorder_fatal(errno, "decoding %s: writing format header", path); |
| 76 | } |
| 77 | |
| 78 | /** @brief Lookup table of decoders */ |
| 79 | static const struct decoder decoders[] = { |
| 80 | { "*.mp3", decode_mp3 }, |
| 81 | { "*.MP3", decode_mp3 }, |
| 82 | { "*.ogg", decode_ogg }, |
| 83 | { "*.OGG", decode_ogg }, |
| 84 | { "*.flac", decode_flac }, |
| 85 | { "*.FLAC", decode_flac }, |
| 86 | { "*.wav", decode_wav }, |
| 87 | { "*.WAV", decode_wav }, |
| 88 | { 0, 0 } |
| 89 | }; |
| 90 | |
| 91 | static 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. */ |
| 98 | static 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 | |
| 111 | int main(int argc, char **argv) { |
| 112 | int n; |
| 113 | const char *e; |
| 114 | |
| 115 | set_progname(argv); |
| 116 | if(!setlocale(LC_CTYPE, "")) disorder_fatal(errno, "calling setlocale"); |
| 117 | while((n = getopt_long(argc, argv, "hV", options, 0)) >= 0) { |
| 118 | switch(n) { |
| 119 | case 'h': help(); |
| 120 | case 'V': version("disorder-decode"); |
| 121 | default: disorder_fatal(0, "invalid option"); |
| 122 | } |
| 123 | } |
| 124 | if(optind >= argc) |
| 125 | disorder_fatal(0, "missing filename"); |
| 126 | if(optind + 1 < argc) |
| 127 | disorder_fatal(0, "excess arguments"); |
| 128 | if((e = getenv("DISORDER_RAW_FD"))) { |
| 129 | if(!(outputfp = fdopen(atoi(e), "wb"))) |
| 130 | disorder_fatal(errno, "fdopen"); |
| 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) |
| 140 | disorder_fatal(0, "cannot determine file type for %s", path); |
| 141 | decoders[n].decode(); |
| 142 | xfclose(outputfp); |
| 143 | return 0; |
| 144 | } |
| 145 | |
| 146 | /* |
| 147 | Local Variables: |
| 148 | c-basic-offset:2 |
| 149 | comment-column:40 |
| 150 | fill-column:79 |
| 151 | indent-tabs-mode:nil |
| 152 | End: |
| 153 | */ |