Mercurial > repos > blastem
view wave.c @ 1442:59e1dbb795a7
Update README in anticipation of 0.5.1 release
author | Michael Pavone <pavone@retrodev.com> |
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date | Fri, 25 Aug 2017 20:12:21 -0700 |
parents | 6e9d1a8c1b08 |
children | efc75ea79164 |
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/* Copyright 2013 Michael Pavone This file is part of BlastEm. BlastEm is free software distributed under the terms of the GNU General Public License version 3 or greater. See COPYING for full license text. */ #include "wave.h" #include <stddef.h> #include <string.h> int wave_init(FILE * f, uint32_t sample_rate, uint16_t bits_per_sample, uint16_t num_channels) { wave_header header; memcpy(header.chunk.id, "RIFF", 4); memcpy(header.chunk.format, "WAVE", 4); header.chunk.size = 0; //This will be filled in later memcpy(header.format_header.id, "fmt ", 4); header.format_header.size = sizeof(wave_header) - (sizeof(header.chunk) + sizeof(header.data_header) + sizeof(header.format_header)); header.audio_format = 1; header.num_channels = num_channels; header.sample_rate = sample_rate; header.byte_rate = sample_rate * num_channels * (bits_per_sample/8); header.block_align = num_channels * (bits_per_sample/8); header.bits_per_sample = bits_per_sample; memcpy(header.data_header.id, "data", 4); header.data_header.size = 0;//This will be filled in later; return fwrite(&header, 1, sizeof(header), f) == sizeof(header); } int wave_finalize(FILE * f) { uint32_t size = ftell(f); fseek(f, offsetof(wave_header, chunk.size), SEEK_SET); size -= 8; if (fwrite(&size, sizeof(size), 1, f) != 1) { fclose(f); return 0; } fseek(f, offsetof(wave_header, data_header.size), SEEK_SET); size -= 36; if (fwrite(&size, sizeof(size), 1, f) != 1) { fclose(f); return 0; } fclose(f); return 1; }