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3017
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1 #include <stdio.h>
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2 #include "SDL.h"
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3
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4 int main(int argc, char **argv)
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5 {
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6 SDL_AudioSpec spec;
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7 SDL_AudioCVT cvt;
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8 Uint32 len = 0;
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9 Uint8 *data = NULL;
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10 int cvtfreq = 0;
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11 int bitsize = 0;
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12 int blockalign = 0;
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13 int avgbytes = 0;
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14 SDL_RWops *io = NULL;
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15
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16 if (argc != 4)
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17 {
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18 fprintf(stderr, "USAGE: %s in.wav out.wav newfreq\n", argv[0]);
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19 return 1;
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20 }
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21
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22 cvtfreq = atoi(argv[3]);
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23
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24 if (SDL_Init(SDL_INIT_AUDIO) == -1)
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25 {
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26 fprintf(stderr, "SDL_Init() failed: %s\n", SDL_GetError());
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27 return 2;
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28 }
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29
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30 if (SDL_LoadWAV(argv[1], &spec, &data, &len) == NULL)
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31 {
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32 fprintf(stderr, "failed to load %s: %s\n", argv[1], SDL_GetError());
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33 SDL_Quit();
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34 return 3;
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35 }
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36
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37 if (SDL_BuildAudioCVT(&cvt, spec.format, spec.channels, spec.freq,
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38 spec.format, spec.channels, cvtfreq) == -1)
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39 {
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40 fprintf(stderr, "failed to build CVT: %s\n", SDL_GetError());
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41 SDL_FreeWAV(data);
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42 SDL_Quit();
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43 return 4;
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44 }
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45
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46 cvt.len = len;
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47 cvt.buf = (Uint8 *) malloc(len * cvt.len_mult);
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48 if (cvt.buf == NULL)
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49 {
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50 fprintf(stderr, "Out of memory.\n");
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51 SDL_FreeWAV(data);
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52 SDL_Quit();
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53 return 5;
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54 }
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55 memcpy(cvt.buf, data, len);
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56
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57 if (SDL_ConvertAudio(&cvt) == -1)
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58 {
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59 fprintf(stderr, "Conversion failed: %s\n", SDL_GetError());
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60 free(cvt.buf);
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61 SDL_FreeWAV(data);
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62 SDL_Quit();
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63 return 6;
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64 }
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65
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66 /* write out a WAV header... */
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67 io = SDL_RWFromFile(argv[2], "wb");
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68 if (io == NULL)
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69 {
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70 fprintf(stderr, "fopen('%s') failed: %s\n", argv[2], SDL_GetError());
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71 free(cvt.buf);
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72 SDL_FreeWAV(data);
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73 SDL_Quit();
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74 return 7;
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75 }
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76
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77 bitsize = SDL_AUDIO_BITSIZE(spec.format);
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78 blockalign = (bitsize / 8) * spec.channels;
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79 avgbytes = cvtfreq * blockalign;
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80
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81 SDL_WriteLE32(io, 0x46464952); /* RIFF */
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82 SDL_WriteLE32(io, len * cvt.len_mult + 36);
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83 SDL_WriteLE32(io, 0x45564157); /* WAVE */
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84 SDL_WriteLE32(io, 0x20746D66); /* fmt */
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85 SDL_WriteLE32(io, 16); /* chunk size */
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86 SDL_WriteLE16(io, 1); /* uncompressed */
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87 SDL_WriteLE16(io, spec.channels); /* channels */
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88 SDL_WriteLE32(io, cvtfreq); /* sample rate */
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89 SDL_WriteLE32(io, avgbytes); /* average bytes per second */
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90 SDL_WriteLE16(io, blockalign); /* block align */
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91 SDL_WriteLE16(io, bitsize); /* significant bits per sample */
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92 SDL_WriteLE32(io, 0x61746164); /* data */
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93 SDL_WriteLE32(io, len * cvt.len_mult); /* size */
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94 SDL_RWwrite(io, cvt.buf, len * cvt.len_mult, 1);
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95
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96 if (SDL_RWclose(io) == -1)
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97 {
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98 fprintf(stderr, "fclose('%s') failed: %s\n", argv[2], SDL_GetError());
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99 free(cvt.buf);
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100 SDL_FreeWAV(data);
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101 SDL_Quit();
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102 return 8;
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103 } // if
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104
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105 free(cvt.buf);
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106 SDL_FreeWAV(data);
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107 SDL_Quit();
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108 return 0;
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109 } // main
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110
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111 // end of resample_test.c ...
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112
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