Mercurial > repos > blastem
annotate wave.c @ 1691:e96d0d3bec7f
Don't leak a system context when a game is unloaded
author | Mike Pavone <pavone@retrodev.com> |
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date | Sun, 20 Jan 2019 22:48:16 -0800 |
parents | 6e9d1a8c1b08 |
children | efc75ea79164 |
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1 /* |
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2 Copyright 2013 Michael Pavone |
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3 This file is part of BlastEm. |
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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. |
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5 */ |
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6 #include "wave.h" |
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7 #include <stddef.h> |
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8 #include <string.h> |
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9 |
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10 int wave_init(FILE * f, uint32_t sample_rate, uint16_t bits_per_sample, uint16_t num_channels) |
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11 { |
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12 wave_header header; |
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13 memcpy(header.chunk.id, "RIFF", 4); |
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14 memcpy(header.chunk.format, "WAVE", 4); |
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15 header.chunk.size = 0; //This will be filled in later |
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16 memcpy(header.format_header.id, "fmt ", 4); |
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17 header.format_header.size = sizeof(wave_header) - (sizeof(header.chunk) + sizeof(header.data_header) + sizeof(header.format_header)); |
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18 header.audio_format = 1; |
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19 header.num_channels = num_channels; |
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20 header.sample_rate = sample_rate; |
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21 header.byte_rate = sample_rate * num_channels * (bits_per_sample/8); |
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22 header.block_align = num_channels * (bits_per_sample/8); |
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23 header.bits_per_sample = bits_per_sample; |
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24 memcpy(header.data_header.id, "data", 4); |
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25 header.data_header.size = 0;//This will be filled in later; |
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26 return fwrite(&header, 1, sizeof(header), f) == sizeof(header); |
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27 } |
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28 |
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29 int wave_finalize(FILE * f) |
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30 { |
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31 uint32_t size = ftell(f); |
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32 fseek(f, offsetof(wave_header, chunk.size), SEEK_SET); |
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33 size -= 8; |
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34 if (fwrite(&size, sizeof(size), 1, f) != 1) { |
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35 fclose(f); |
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36 return 0; |
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37 } |
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38 fseek(f, offsetof(wave_header, data_header.size), SEEK_SET); |
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39 size -= 36; |
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40 if (fwrite(&size, sizeof(size), 1, f) != 1) { |
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41 fclose(f); |
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42 return 0; |
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43 } |
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44 fclose(f); |
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45 return 1; |
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46 } |