Mercurial > repos > blastem
comparison wave.c @ 407:c3abc4ada43d
Add support for logging YM2612 channels to WAVE files
author | Mike Pavone <pavone@retrodev.com> |
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date | Sun, 16 Jun 2013 17:57:57 -0700 |
parents | |
children | 140af5509ce7 |
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406:b1bc1947d949 | 407:c3abc4ada43d |
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1 #include "wave.h" | |
2 #include <stddef.h> | |
3 #include <string.h> | |
4 | |
5 int wave_init(FILE * f, uint32_t sample_rate, uint16_t bits_per_sample, uint16_t num_channels) | |
6 { | |
7 wave_header header; | |
8 memcpy(header.chunk.id, "RIFF", 4); | |
9 memcpy(header.chunk.format, "WAVE", 4); | |
10 header.chunk.size = 0; //This will be filled in later | |
11 memcpy(header.format_header.id, "fmt ", 4); | |
12 header.format_header.size = sizeof(wave_header) - (sizeof(header.chunk) + sizeof(header.data_header) + sizeof(header.format_header)); | |
13 header.audio_format = 1; | |
14 header.num_channels = num_channels; | |
15 header.sample_rate = sample_rate; | |
16 header.byte_rate = sample_rate * num_channels * (bits_per_sample/8); | |
17 header.block_align = num_channels * (bits_per_sample/8); | |
18 header.bits_per_sample = bits_per_sample; | |
19 memcpy(header.data_header.id, "data", 4); | |
20 header.data_header.size = 0;//This will be filled in later; | |
21 return fwrite(&header, 1, sizeof(header), f) == sizeof(header); | |
22 } | |
23 | |
24 int wave_finalize(FILE * f) | |
25 { | |
26 uint32_t size = ftell(f); | |
27 fseek(f, offsetof(wave_header, chunk.size), SEEK_SET); | |
28 size -= 8; | |
29 if (fwrite(&size, sizeof(size), 1, f) != sizeof(size)) { | |
30 fclose(f); | |
31 return 0; | |
32 } | |
33 fseek(f, offsetof(wave_header, data_header.size), SEEK_SET); | |
34 size -= 36; | |
35 if (fwrite(&size, sizeof(size), 1, f)) { | |
36 fclose(f); | |
37 return 0; | |
38 } | |
39 fclose(f); | |
40 return 1; | |
41 } |