Mercurial > repos > blastem
view wave.c @ 555:5af986d2b9da
Start work on refactoring some of the backend code to allow more sharing between M68K and Z80 cores and possibly also between x86 and the ARM backend when it exists
author | Michael Pavone <pavone@retrodev.com> |
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date | Mon, 24 Feb 2014 00:39:02 -0800 |
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; }