120 lines
3.7 KiB
C
120 lines
3.7 KiB
C
/*
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Copyright (C) 1997-2020 Sam Lantinga <slouken@libsdl.org>
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This software is provided 'as-is', without any express or implied
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warranty. In no event will the authors be held liable for any damages
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arising from the use of this software.
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Permission is granted to anyone to use this software for any purpose,
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including commercial applications, and to alter it and redistribute it
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freely.
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*/
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#include "SDL.h"
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int
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main(int argc, char **argv)
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{
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SDL_AudioSpec spec;
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SDL_AudioCVT cvt;
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Uint32 len = 0;
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Uint8 *data = NULL;
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int cvtfreq = 0;
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int cvtchans = 0;
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int bitsize = 0;
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int blockalign = 0;
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int avgbytes = 0;
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SDL_RWops *io = NULL;
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/* Enable standard application logging */
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SDL_LogSetPriority(SDL_LOG_CATEGORY_APPLICATION, SDL_LOG_PRIORITY_INFO);
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if (argc != 5) {
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SDL_Log("USAGE: %s in.wav out.wav newfreq newchans\n", argv[0]);
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return 1;
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}
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cvtfreq = SDL_atoi(argv[3]);
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cvtchans = SDL_atoi(argv[4]);
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if (SDL_Init(SDL_INIT_AUDIO) == -1) {
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SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "SDL_Init() failed: %s\n", SDL_GetError());
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return 2;
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}
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if (SDL_LoadWAV(argv[1], &spec, &data, &len) == NULL) {
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SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "failed to load %s: %s\n", argv[1], SDL_GetError());
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SDL_Quit();
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return 3;
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}
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if (SDL_BuildAudioCVT(&cvt, spec.format, spec.channels, spec.freq,
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spec.format, cvtchans, cvtfreq) == -1) {
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SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "failed to build CVT: %s\n", SDL_GetError());
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SDL_FreeWAV(data);
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SDL_Quit();
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return 4;
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}
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cvt.len = len;
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cvt.buf = (Uint8 *) SDL_malloc(len * cvt.len_mult);
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if (cvt.buf == NULL) {
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SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Out of memory.\n");
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SDL_FreeWAV(data);
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SDL_Quit();
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return 5;
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}
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SDL_memcpy(cvt.buf, data, len);
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if (SDL_ConvertAudio(&cvt) == -1) {
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SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Conversion failed: %s\n", SDL_GetError());
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SDL_free(cvt.buf);
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SDL_FreeWAV(data);
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SDL_Quit();
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return 6;
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}
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/* write out a WAV header... */
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io = SDL_RWFromFile(argv[2], "wb");
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if (io == NULL) {
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SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "fopen('%s') failed: %s\n", argv[2], SDL_GetError());
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SDL_free(cvt.buf);
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SDL_FreeWAV(data);
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SDL_Quit();
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return 7;
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}
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bitsize = SDL_AUDIO_BITSIZE(spec.format);
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blockalign = (bitsize / 8) * cvtchans;
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avgbytes = cvtfreq * blockalign;
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SDL_WriteLE32(io, 0x46464952); /* RIFF */
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SDL_WriteLE32(io, cvt.len_cvt + 36);
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SDL_WriteLE32(io, 0x45564157); /* WAVE */
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SDL_WriteLE32(io, 0x20746D66); /* fmt */
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SDL_WriteLE32(io, 16); /* chunk size */
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SDL_WriteLE16(io, SDL_AUDIO_ISFLOAT(spec.format) ? 3 : 1); /* uncompressed */
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SDL_WriteLE16(io, cvtchans); /* channels */
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SDL_WriteLE32(io, cvtfreq); /* sample rate */
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SDL_WriteLE32(io, avgbytes); /* average bytes per second */
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SDL_WriteLE16(io, blockalign); /* block align */
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SDL_WriteLE16(io, bitsize); /* significant bits per sample */
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SDL_WriteLE32(io, 0x61746164); /* data */
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SDL_WriteLE32(io, cvt.len_cvt); /* size */
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SDL_RWwrite(io, cvt.buf, cvt.len_cvt, 1);
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if (SDL_RWclose(io) == -1) {
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SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "fclose('%s') failed: %s\n", argv[2], SDL_GetError());
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SDL_free(cvt.buf);
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SDL_FreeWAV(data);
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SDL_Quit();
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return 8;
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} /* if */
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SDL_free(cvt.buf);
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SDL_FreeWAV(data);
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SDL_Quit();
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return 0;
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} /* main */
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/* end of testresample.c ... */
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