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comparison test/testresample.c @ 3017:3272431eeee2

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Added testresample.c
author Ryan C. Gordon <icculus@icculus.org>
date Sun, 11 Jan 2009 04:05:28 +0000
parents
children d706d3170d7d
comparison
equal deleted inserted replaced
3016:6be275627762 3017:3272431eeee2
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 */
93 SDL_WriteLE32(io, len * cvt.len_mult); /* size */
94 SDL_RWwrite(io, cvt.buf, len * cvt.len_mult, 1);
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