1 /*
2 Copyright (C) 1997-2020 Sam Lantinga <slouken@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
main(int argc,char ** argv)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 cvtchans = 0;
24 int bitsize = 0;
25 int blockalign = 0;
26 int avgbytes = 0;
27 SDL_RWops *io = NULL;
28
29 /* Enable standard application logging */
30 SDL_LogSetPriority(SDL_LOG_CATEGORY_APPLICATION, SDL_LOG_PRIORITY_INFO);
31
32 if (argc != 5) {
33 SDL_Log("USAGE: %s in.wav out.wav newfreq newchans\n", argv[0]);
34 return 1;
35 }
36
37 cvtfreq = SDL_atoi(argv[3]);
38 cvtchans = SDL_atoi(argv[4]);
39
40 if (SDL_Init(SDL_INIT_AUDIO) == -1) {
41 SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "SDL_Init() failed: %s\n", SDL_GetError());
42 return 2;
43 }
44
45 if (SDL_LoadWAV(argv[1], &spec, &data, &len) == NULL) {
46 SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "failed to load %s: %s\n", argv[1], SDL_GetError());
47 SDL_Quit();
48 return 3;
49 }
50
51 if (SDL_BuildAudioCVT(&cvt, spec.format, spec.channels, spec.freq,
52 spec.format, cvtchans, cvtfreq) == -1) {
53 SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "failed to build CVT: %s\n", SDL_GetError());
54 SDL_FreeWAV(data);
55 SDL_Quit();
56 return 4;
57 }
58
59 cvt.len = len;
60 cvt.buf = (Uint8 *) SDL_malloc(len * cvt.len_mult);
61 if (cvt.buf == NULL) {
62 SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Out of memory.\n");
63 SDL_FreeWAV(data);
64 SDL_Quit();
65 return 5;
66 }
67 SDL_memcpy(cvt.buf, data, len);
68
69 if (SDL_ConvertAudio(&cvt) == -1) {
70 SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Conversion failed: %s\n", SDL_GetError());
71 SDL_free(cvt.buf);
72 SDL_FreeWAV(data);
73 SDL_Quit();
74 return 6;
75 }
76
77 /* write out a WAV header... */
78 io = SDL_RWFromFile(argv[2], "wb");
79 if (io == NULL) {
80 SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "fopen('%s') failed: %s\n", argv[2], SDL_GetError());
81 SDL_free(cvt.buf);
82 SDL_FreeWAV(data);
83 SDL_Quit();
84 return 7;
85 }
86
87 bitsize = SDL_AUDIO_BITSIZE(spec.format);
88 blockalign = (bitsize / 8) * cvtchans;
89 avgbytes = cvtfreq * blockalign;
90
91 SDL_WriteLE32(io, 0x46464952); /* RIFF */
92 SDL_WriteLE32(io, cvt.len_cvt + 36);
93 SDL_WriteLE32(io, 0x45564157); /* WAVE */
94 SDL_WriteLE32(io, 0x20746D66); /* fmt */
95 SDL_WriteLE32(io, 16); /* chunk size */
96 SDL_WriteLE16(io, SDL_AUDIO_ISFLOAT(spec.format) ? 3 : 1); /* uncompressed */
97 SDL_WriteLE16(io, cvtchans); /* channels */
98 SDL_WriteLE32(io, cvtfreq); /* sample rate */
99 SDL_WriteLE32(io, avgbytes); /* average bytes per second */
100 SDL_WriteLE16(io, blockalign); /* block align */
101 SDL_WriteLE16(io, bitsize); /* significant bits per sample */
102 SDL_WriteLE32(io, 0x61746164); /* data */
103 SDL_WriteLE32(io, cvt.len_cvt); /* size */
104 SDL_RWwrite(io, cvt.buf, cvt.len_cvt, 1);
105
106 if (SDL_RWclose(io) == -1) {
107 SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "fclose('%s') failed: %s\n", argv[2], SDL_GetError());
108 SDL_free(cvt.buf);
109 SDL_FreeWAV(data);
110 SDL_Quit();
111 return 8;
112 } /* if */
113
114 SDL_free(cvt.buf);
115 SDL_FreeWAV(data);
116 SDL_Quit();
117 return 0;
118 } /* main */
119
120 /* end of testresample.c ... */
121