mirror of https://github.com/libsdl-org/SDL
103 lines
3.4 KiB
C
103 lines
3.4 KiB
C
/*
|
|
Copyright (C) 1997-2023 Sam Lantinga <slouken@libsdl.org>
|
|
|
|
This software is provided 'as-is', without any express or implied
|
|
warranty. In no event will the authors be held liable for any damages
|
|
arising from the use of this software.
|
|
|
|
Permission is granted to anyone to use this software for any purpose,
|
|
including commercial applications, and to alter it and redistribute it
|
|
freely.
|
|
*/
|
|
|
|
#include <SDL3/SDL.h>
|
|
#include <SDL3/SDL_main.h>
|
|
|
|
int main(int argc, char **argv)
|
|
{
|
|
SDL_AudioSpec spec;
|
|
SDL_AudioStream *stream = NULL;
|
|
Uint8 *dst_buf = NULL;
|
|
Uint32 len = 0;
|
|
Uint8 *data = NULL;
|
|
int cvtfreq = 0;
|
|
int cvtchans = 0;
|
|
int bitsize = 0;
|
|
int blockalign = 0;
|
|
int avgbytes = 0;
|
|
SDL_RWops *io = NULL;
|
|
int dst_len;
|
|
int ret = 0;
|
|
|
|
/* Enable standard application logging */
|
|
SDL_LogSetPriority(SDL_LOG_CATEGORY_APPLICATION, SDL_LOG_PRIORITY_INFO);
|
|
|
|
if (argc != 5) {
|
|
SDL_Log("USAGE: %s in.wav out.wav newfreq newchans\n", argv[0]);
|
|
ret = 1;
|
|
goto end;
|
|
}
|
|
|
|
cvtfreq = SDL_atoi(argv[3]);
|
|
cvtchans = SDL_atoi(argv[4]);
|
|
|
|
if (SDL_Init(SDL_INIT_AUDIO) == -1) {
|
|
SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "SDL_Init() failed: %s\n", SDL_GetError());
|
|
ret = 2;
|
|
goto end;
|
|
}
|
|
|
|
if (SDL_LoadWAV(argv[1], &spec, &data, &len) == NULL) {
|
|
SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "failed to load %s: %s\n", argv[1], SDL_GetError());
|
|
ret = 3;
|
|
goto end;
|
|
}
|
|
|
|
if (SDL_ConvertAudioSamples(spec.format, spec.channels, spec.freq, len, data,
|
|
spec.format, cvtchans, cvtfreq, &dst_len, &dst_buf) < 0) {
|
|
SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "failed to convert samples: %s\n", SDL_GetError());
|
|
ret = 4;
|
|
goto end;
|
|
}
|
|
|
|
/* write out a WAV header... */
|
|
io = SDL_RWFromFile(argv[2], "wb");
|
|
if (io == NULL) {
|
|
SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "fopen('%s') failed: %s\n", argv[2], SDL_GetError());
|
|
ret = 5;
|
|
goto end;
|
|
}
|
|
|
|
bitsize = SDL_AUDIO_BITSIZE(spec.format);
|
|
blockalign = (bitsize / 8) * cvtchans;
|
|
avgbytes = cvtfreq * blockalign;
|
|
|
|
SDL_WriteLE32(io, 0x46464952); /* RIFF */
|
|
SDL_WriteLE32(io, dst_len + 36);
|
|
SDL_WriteLE32(io, 0x45564157); /* WAVE */
|
|
SDL_WriteLE32(io, 0x20746D66); /* fmt */
|
|
SDL_WriteLE32(io, 16); /* chunk size */
|
|
SDL_WriteLE16(io, SDL_AUDIO_ISFLOAT(spec.format) ? 3 : 1); /* uncompressed */
|
|
SDL_WriteLE16(io, cvtchans); /* channels */
|
|
SDL_WriteLE32(io, cvtfreq); /* sample rate */
|
|
SDL_WriteLE32(io, avgbytes); /* average bytes per second */
|
|
SDL_WriteLE16(io, blockalign); /* block align */
|
|
SDL_WriteLE16(io, bitsize); /* significant bits per sample */
|
|
SDL_WriteLE32(io, 0x61746164); /* data */
|
|
SDL_WriteLE32(io, dst_len); /* size */
|
|
SDL_RWwrite(io, dst_buf, dst_len);
|
|
|
|
if (SDL_RWclose(io) == -1) {
|
|
SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "fclose('%s') failed: %s\n", argv[2], SDL_GetError());
|
|
ret = 6;
|
|
goto end;
|
|
}
|
|
|
|
end:
|
|
SDL_free(dst_buf);
|
|
SDL_free(data);
|
|
SDL_DestroyAudioStream(stream);
|
|
SDL_Quit();
|
|
return ret;
|
|
}
|