Mercurial > sdl-ios-xcode
annotate test/testresample.c @ 3018:d706d3170d7d
testresample.c: Write out correct size for resampled buffer.
| author | Ryan C. Gordon <icculus@icculus.org> |
|---|---|
| date | Sun, 11 Jan 2009 04:29:36 +0000 |
| parents | 3272431eeee2 |
| children | 62d4992e5a92 |
| rev | line source |
|---|---|
| 3017 | 1 #include <stdio.h> |
| 2 #include "SDL.h" | |
| 3 | |
| 4 int main(int argc, char **argv) | |
| 5 { | |
| 6 SDL_AudioSpec spec; | |
| 7 SDL_AudioCVT cvt; | |
| 8 Uint32 len = 0; | |
| 9 Uint8 *data = NULL; | |
| 10 int cvtfreq = 0; | |
| 11 int bitsize = 0; | |
| 12 int blockalign = 0; | |
| 13 int avgbytes = 0; | |
| 14 SDL_RWops *io = NULL; | |
| 15 | |
| 16 if (argc != 4) | |
| 17 { | |
| 18 fprintf(stderr, "USAGE: %s in.wav out.wav newfreq\n", argv[0]); | |
| 19 return 1; | |
| 20 } | |
| 21 | |
| 22 cvtfreq = atoi(argv[3]); | |
| 23 | |
| 24 if (SDL_Init(SDL_INIT_AUDIO) == -1) | |
| 25 { | |
| 26 fprintf(stderr, "SDL_Init() failed: %s\n", SDL_GetError()); | |
| 27 return 2; | |
| 28 } | |
| 29 | |
| 30 if (SDL_LoadWAV(argv[1], &spec, &data, &len) == NULL) | |
| 31 { | |
| 32 fprintf(stderr, "failed to load %s: %s\n", argv[1], SDL_GetError()); | |
| 33 SDL_Quit(); | |
| 34 return 3; | |
| 35 } | |
| 36 | |
| 37 if (SDL_BuildAudioCVT(&cvt, spec.format, spec.channels, spec.freq, | |
| 38 spec.format, spec.channels, cvtfreq) == -1) | |
| 39 { | |
| 40 fprintf(stderr, "failed to build CVT: %s\n", SDL_GetError()); | |
| 41 SDL_FreeWAV(data); | |
| 42 SDL_Quit(); | |
| 43 return 4; | |
| 44 } | |
| 45 | |
| 46 cvt.len = len; | |
| 47 cvt.buf = (Uint8 *) malloc(len * cvt.len_mult); | |
| 48 if (cvt.buf == NULL) | |
| 49 { | |
| 50 fprintf(stderr, "Out of memory.\n"); | |
| 51 SDL_FreeWAV(data); | |
| 52 SDL_Quit(); | |
| 53 return 5; | |
| 54 } | |
| 55 memcpy(cvt.buf, data, len); | |
| 56 | |
| 57 if (SDL_ConvertAudio(&cvt) == -1) | |
| 58 { | |
| 59 fprintf(stderr, "Conversion failed: %s\n", SDL_GetError()); | |
| 60 free(cvt.buf); | |
| 61 SDL_FreeWAV(data); | |
| 62 SDL_Quit(); | |
| 63 return 6; | |
| 64 } | |
| 65 | |
| 66 /* write out a WAV header... */ | |
| 67 io = SDL_RWFromFile(argv[2], "wb"); | |
| 68 if (io == NULL) | |
| 69 { | |
| 70 fprintf(stderr, "fopen('%s') failed: %s\n", argv[2], SDL_GetError()); | |
| 71 free(cvt.buf); | |
| 72 SDL_FreeWAV(data); | |
| 73 SDL_Quit(); | |
| 74 return 7; | |
| 75 } | |
| 76 | |
| 77 bitsize = SDL_AUDIO_BITSIZE(spec.format); | |
| 78 blockalign = (bitsize / 8) * spec.channels; | |
| 79 avgbytes = cvtfreq * blockalign; | |
| 80 | |
| 81 SDL_WriteLE32(io, 0x46464952); /* RIFF */ | |
| 82 SDL_WriteLE32(io, len * cvt.len_mult + 36); | |
| 83 SDL_WriteLE32(io, 0x45564157); /* WAVE */ | |
| 84 SDL_WriteLE32(io, 0x20746D66); /* fmt */ | |
| 85 SDL_WriteLE32(io, 16); /* chunk size */ | |
| 86 SDL_WriteLE16(io, 1); /* uncompressed */ | |
| 87 SDL_WriteLE16(io, spec.channels); /* channels */ | |
| 88 SDL_WriteLE32(io, cvtfreq); /* sample rate */ | |
| 89 SDL_WriteLE32(io, avgbytes); /* average bytes per second */ | |
| 90 SDL_WriteLE16(io, blockalign); /* block align */ | |
| 91 SDL_WriteLE16(io, bitsize); /* significant bits per sample */ | |
| 92 SDL_WriteLE32(io, 0x61746164); /* data */ | |
|
3018
d706d3170d7d
testresample.c: Write out correct size for resampled buffer.
Ryan C. Gordon <icculus@icculus.org>
parents:
3017
diff
changeset
|
93 SDL_WriteLE32(io, cvt.len_cvt); /* size */ |
|
d706d3170d7d
testresample.c: Write out correct size for resampled buffer.
Ryan C. Gordon <icculus@icculus.org>
parents:
3017
diff
changeset
|
94 SDL_RWwrite(io, cvt.buf, cvt.len_cvt, 1); |
| 3017 | 95 |
| 96 if (SDL_RWclose(io) == -1) | |
| 97 { | |
| 98 fprintf(stderr, "fclose('%s') failed: %s\n", argv[2], SDL_GetError()); | |
| 99 free(cvt.buf); | |
| 100 SDL_FreeWAV(data); | |
| 101 SDL_Quit(); | |
| 102 return 8; | |
| 103 } // if | |
| 104 | |
| 105 free(cvt.buf); | |
| 106 SDL_FreeWAV(data); | |
| 107 SDL_Quit(); | |
| 108 return 0; | |
| 109 } // main | |
| 110 | |
| 111 // end of resample_test.c ... | |
| 112 |