Mercurial > repos > blastem
annotate wave.c @ 1044:1625555e346e
Properly handle redundant prefixes
author | Michael Pavone <pavone@retrodev.com> |
---|---|
date | Mon, 25 Jul 2016 23:16:04 -0700 |
parents | 6e9d1a8c1b08 |
children | efc75ea79164 |
rev | line source |
---|---|
467
140af5509ce7
Added copyright notice to source files and added GPL license text in COPYING
Mike Pavone <pavone@retrodev.com>
parents:
407
diff
changeset
|
1 /* |
140af5509ce7
Added copyright notice to source files and added GPL license text in COPYING
Mike Pavone <pavone@retrodev.com>
parents:
407
diff
changeset
|
2 Copyright 2013 Michael Pavone |
520
6e9d1a8c1b08
Fix check of fwrite return value in wave_finalize so that the data subchunk size gets written
Michael Pavone <pavone@retrodev.com>
parents:
467
diff
changeset
|
3 This file is part of BlastEm. |
467
140af5509ce7
Added copyright notice to source files and added GPL license text in COPYING
Mike Pavone <pavone@retrodev.com>
parents:
407
diff
changeset
|
4 BlastEm is free software distributed under the terms of the GNU General Public License version 3 or greater. See COPYING for full license text. |
140af5509ce7
Added copyright notice to source files and added GPL license text in COPYING
Mike Pavone <pavone@retrodev.com>
parents:
407
diff
changeset
|
5 */ |
407
c3abc4ada43d
Add support for logging YM2612 channels to WAVE files
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
6 #include "wave.h" |
c3abc4ada43d
Add support for logging YM2612 channels to WAVE files
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
7 #include <stddef.h> |
c3abc4ada43d
Add support for logging YM2612 channels to WAVE files
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
8 #include <string.h> |
c3abc4ada43d
Add support for logging YM2612 channels to WAVE files
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
9 |
c3abc4ada43d
Add support for logging YM2612 channels to WAVE files
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
10 int wave_init(FILE * f, uint32_t sample_rate, uint16_t bits_per_sample, uint16_t num_channels) |
c3abc4ada43d
Add support for logging YM2612 channels to WAVE files
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
11 { |
c3abc4ada43d
Add support for logging YM2612 channels to WAVE files
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
12 wave_header header; |
c3abc4ada43d
Add support for logging YM2612 channels to WAVE files
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
13 memcpy(header.chunk.id, "RIFF", 4); |
c3abc4ada43d
Add support for logging YM2612 channels to WAVE files
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
14 memcpy(header.chunk.format, "WAVE", 4); |
c3abc4ada43d
Add support for logging YM2612 channels to WAVE files
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
15 header.chunk.size = 0; //This will be filled in later |
c3abc4ada43d
Add support for logging YM2612 channels to WAVE files
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
16 memcpy(header.format_header.id, "fmt ", 4); |
c3abc4ada43d
Add support for logging YM2612 channels to WAVE files
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
17 header.format_header.size = sizeof(wave_header) - (sizeof(header.chunk) + sizeof(header.data_header) + sizeof(header.format_header)); |
c3abc4ada43d
Add support for logging YM2612 channels to WAVE files
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
18 header.audio_format = 1; |
c3abc4ada43d
Add support for logging YM2612 channels to WAVE files
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
19 header.num_channels = num_channels; |
c3abc4ada43d
Add support for logging YM2612 channels to WAVE files
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
20 header.sample_rate = sample_rate; |
c3abc4ada43d
Add support for logging YM2612 channels to WAVE files
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
21 header.byte_rate = sample_rate * num_channels * (bits_per_sample/8); |
c3abc4ada43d
Add support for logging YM2612 channels to WAVE files
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
22 header.block_align = num_channels * (bits_per_sample/8); |
c3abc4ada43d
Add support for logging YM2612 channels to WAVE files
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
23 header.bits_per_sample = bits_per_sample; |
c3abc4ada43d
Add support for logging YM2612 channels to WAVE files
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
24 memcpy(header.data_header.id, "data", 4); |
c3abc4ada43d
Add support for logging YM2612 channels to WAVE files
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
25 header.data_header.size = 0;//This will be filled in later; |
c3abc4ada43d
Add support for logging YM2612 channels to WAVE files
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
26 return fwrite(&header, 1, sizeof(header), f) == sizeof(header); |
c3abc4ada43d
Add support for logging YM2612 channels to WAVE files
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
27 } |
c3abc4ada43d
Add support for logging YM2612 channels to WAVE files
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
28 |
c3abc4ada43d
Add support for logging YM2612 channels to WAVE files
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
29 int wave_finalize(FILE * f) |
c3abc4ada43d
Add support for logging YM2612 channels to WAVE files
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
30 { |
c3abc4ada43d
Add support for logging YM2612 channels to WAVE files
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
31 uint32_t size = ftell(f); |
c3abc4ada43d
Add support for logging YM2612 channels to WAVE files
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
32 fseek(f, offsetof(wave_header, chunk.size), SEEK_SET); |
c3abc4ada43d
Add support for logging YM2612 channels to WAVE files
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
33 size -= 8; |
520
6e9d1a8c1b08
Fix check of fwrite return value in wave_finalize so that the data subchunk size gets written
Michael Pavone <pavone@retrodev.com>
parents:
467
diff
changeset
|
34 if (fwrite(&size, sizeof(size), 1, f) != 1) { |
407
c3abc4ada43d
Add support for logging YM2612 channels to WAVE files
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
35 fclose(f); |
c3abc4ada43d
Add support for logging YM2612 channels to WAVE files
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
36 return 0; |
c3abc4ada43d
Add support for logging YM2612 channels to WAVE files
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
37 } |
c3abc4ada43d
Add support for logging YM2612 channels to WAVE files
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
38 fseek(f, offsetof(wave_header, data_header.size), SEEK_SET); |
c3abc4ada43d
Add support for logging YM2612 channels to WAVE files
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
39 size -= 36; |
520
6e9d1a8c1b08
Fix check of fwrite return value in wave_finalize so that the data subchunk size gets written
Michael Pavone <pavone@retrodev.com>
parents:
467
diff
changeset
|
40 if (fwrite(&size, sizeof(size), 1, f) != 1) { |
407
c3abc4ada43d
Add support for logging YM2612 channels to WAVE files
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
41 fclose(f); |
c3abc4ada43d
Add support for logging YM2612 channels to WAVE files
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
42 return 0; |
c3abc4ada43d
Add support for logging YM2612 channels to WAVE files
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
43 } |
c3abc4ada43d
Add support for logging YM2612 channels to WAVE files
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
44 fclose(f); |
c3abc4ada43d
Add support for logging YM2612 channels to WAVE files
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
45 return 1; |
c3abc4ada43d
Add support for logging YM2612 channels to WAVE files
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
|
46 } |