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28e9141a RK |
1 | /* |
2 | * This file is part of DisOrder. | |
3 | * Copyright (C) 2004, 2005, 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 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 plugins/tracklength-wav.c | |
19 | * @brief Compute track lengths for WAV files | |
20 | */ | |
21 | #include "tracklength.h" | |
22 | #include "wav.h" | |
23 | ||
24 | long tl_wav(const char *path) { | |
25 | struct wavfile f[1]; | |
26 | int err, sample_frame_size; | |
27 | long duration; | |
28 | ||
29 | if((err = wav_init(f, path))) { | |
30 | disorder_error(err, "error opening %s", path); | |
31 | return -1; | |
32 | } | |
33 | sample_frame_size = (f->bits + 7) / 8 * f->channels; | |
34 | if(sample_frame_size) { | |
35 | const long long n_samples = f->datasize / sample_frame_size; | |
36 | duration = (n_samples + f->rate - 1) / f->rate; | |
37 | } else | |
38 | duration = -1; | |
39 | wav_destroy(f); | |
40 | return duration; | |
41 | } | |
42 | ||
43 | /* | |
44 | Local Variables: | |
45 | c-basic-offset:2 | |
46 | comment-column:40 | |
47 | fill-column:79 | |
48 | End: | |
49 | */ |