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120 lines
3.7 KiB
120 lines
3.7 KiB
/* |
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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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