1 | /* |
2 | Copyright (C) 1997-2021 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 |
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 | |