1 /* 2 Copyright (C) 1997-2014 Sam Lantinga <slouken (at) libsdl.org> 3 4 This software is provided 'as-is', without any express or implied 5 warranty. In no event will the authors be held liable for any damages 6 arising from the use of this software. 7 8 Permission is granted to anyone to use this software for any purpose, 9 including commercial applications, and to alter it and redistribute it 10 freely. 11 */ 12 13 #include "SDL.h" 14 15 int 16 main(int argc, char **argv) 17 { 18 SDL_AudioSpec spec; 19 SDL_AudioCVT cvt; 20 Uint32 len = 0; 21 Uint8 *data = NULL; 22 int cvtfreq = 0; 23 int bitsize = 0; 24 int blockalign = 0; 25 int avgbytes = 0; 26 SDL_RWops *io = NULL; 27 28 /* Enable standard application logging */ 29 SDL_LogSetPriority(SDL_LOG_CATEGORY_APPLICATION, SDL_LOG_PRIORITY_INFO); 30 31 if (argc != 4) { 32 SDL_Log("USAGE: %s in.wav out.wav newfreq\n", argv[0]); 33 return 1; 34 } 35 36 cvtfreq = SDL_atoi(argv[3]); 37 38 if (SDL_Init(SDL_INIT_AUDIO) == -1) { 39 SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "SDL_Init() failed: %s\n", SDL_GetError()); 40 return 2; 41 } 42 43 if (SDL_LoadWAV(argv[1], &spec, &data, &len) == NULL) { 44 SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "failed to load %s: %s\n", argv[1], SDL_GetError()); 45 SDL_Quit(); 46 return 3; 47 } 48 49 if (SDL_BuildAudioCVT(&cvt, spec.format, spec.channels, spec.freq, 50 spec.format, spec.channels, cvtfreq) == -1) { 51 SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "failed to build CVT: %s\n", SDL_GetError()); 52 SDL_FreeWAV(data); 53 SDL_Quit(); 54 return 4; 55 } 56 57 cvt.len = len; 58 cvt.buf = (Uint8 *) SDL_malloc(len * cvt.len_mult); 59 if (cvt.buf == NULL) { 60 SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Out of memory.\n"); 61 SDL_FreeWAV(data); 62 SDL_Quit(); 63 return 5; 64 } 65 SDL_memcpy(cvt.buf, data, len); 66 67 if (SDL_ConvertAudio(&cvt) == -1) { 68 SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Conversion failed: %s\n", SDL_GetError()); 69 SDL_free(cvt.buf); 70 SDL_FreeWAV(data); 71 SDL_Quit(); 72 return 6; 73 } 74 75 /* write out a WAV header... */ 76 io = SDL_RWFromFile(argv[2], "wb"); 77 if (io == NULL) { 78 SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "fopen('%s') failed: %s\n", argv[2], SDL_GetError()); 79 SDL_free(cvt.buf); 80 SDL_FreeWAV(data); 81 SDL_Quit(); 82 return 7; 83 } 84 85 bitsize = SDL_AUDIO_BITSIZE(spec.format); 86 blockalign = (bitsize / 8) * spec.channels; 87 avgbytes = cvtfreq * blockalign; 88 89 SDL_WriteLE32(io, 0x46464952); /* RIFF */ 90 SDL_WriteLE32(io, len * cvt.len_mult + 36); 91 SDL_WriteLE32(io, 0x45564157); /* WAVE */ 92 SDL_WriteLE32(io, 0x20746D66); /* fmt */ 93 SDL_WriteLE32(io, 16); /* chunk size */ 94 SDL_WriteLE16(io, 1); /* uncompressed */ 95 SDL_WriteLE16(io, spec.channels); /* channels */ 96 SDL_WriteLE32(io, cvtfreq); /* sample rate */ 97 SDL_WriteLE32(io, avgbytes); /* average bytes per second */ 98 SDL_WriteLE16(io, blockalign); /* block align */ 99 SDL_WriteLE16(io, bitsize); /* significant bits per sample */ 100 SDL_WriteLE32(io, 0x61746164); /* data */ 101 SDL_WriteLE32(io, cvt.len_cvt); /* size */ 102 SDL_RWwrite(io, cvt.buf, cvt.len_cvt, 1); 103 104 if (SDL_RWclose(io) == -1) { 105 SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "fclose('%s') failed: %s\n", argv[2], SDL_GetError()); 106 SDL_free(cvt.buf); 107 SDL_FreeWAV(data); 108 SDL_Quit(); 109 return 8; 110 } /* if */ 111 112 SDL_free(cvt.buf); 113 SDL_FreeWAV(data); 114 SDL_Quit(); 115 return 0; 116 } /* main */ 117 118 /* end of resample_test.c ... */ 119
