1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
|
/*
Copyright (C) 1997-2025 Sam Lantinga <slouken@libsdl.org>
This software is provided 'as-is', without any express or implied
warranty. In no event will the authors be held liable for any damages
arising from the use of this software.
Permission is granted to anyone to use this software for any purpose,
including commercial applications, and to alter it and redistribute it
freely.
*/
#include <SDL3/SDL.h>
#include <SDL3/SDL_main.h>
#include <SDL3/SDL_test.h>
static void log_usage(char *progname, SDLTest_CommonState *state) {
static const char *options[] = { "in.wav", "out.wav", "newfreq", "newchan", NULL };
SDLTest_CommonLogUsage(state, progname, options);
}
int main(int argc, char **argv)
{
SDL_AudioSpec spec;
SDL_AudioSpec cvtspec;
SDL_AudioStream *stream = NULL;
Uint8 *dst_buf = NULL;
Uint32 len = 0;
Uint8 *data = NULL;
int bitsize = 0;
int blockalign = 0;
int avgbytes = 0;
SDL_IOStream *io = NULL;
int dst_len;
int ret = 0;
int argpos = 0;
int i;
SDLTest_CommonState *state;
char *file_in = NULL;
char *file_out = NULL;
/* Initialize test framework */
state = SDLTest_CommonCreateState(argv, 0);
if (!state) {
return 1;
}
SDL_zero(cvtspec);
/* Parse commandline */
for (i = 1; i < argc;) {
int consumed;
consumed = SDLTest_CommonArg(state, i);
if (!consumed) {
if (argpos == 0) {
file_in = argv[i];
argpos++;
consumed = 1;
} else if (argpos == 1) {
file_out = argv[i];
argpos++;
consumed = 1;
} else if (argpos == 2) {
char *endp;
cvtspec.freq = (int)SDL_strtoul(argv[i], &endp, 0);
if (endp != argv[i] && *endp == '\0') {
argpos++;
consumed = 1;
}
} else if (argpos == 3) {
char *endp;
cvtspec.channels = (int)SDL_strtoul(argv[i], &endp, 0);
if (endp != argv[i] && *endp == '\0') {
argpos++;
consumed = 1;
}
}
}
if (consumed <= 0) {
log_usage(argv[0], state);
ret = 1;
goto end;
}
i += consumed;
}
if (argpos != 4) {
log_usage(argv[0], state);
ret = 1;
goto end;
}
if (!SDL_Init(SDL_INIT_AUDIO)) {
SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "SDL_Init() failed: %s", SDL_GetError());
ret = 2;
goto end;
}
if (!SDL_LoadWAV(file_in, &spec, &data, &len)) {
SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "failed to load %s: %s", file_in, SDL_GetError());
ret = 3;
goto end;
}
cvtspec.format = spec.format;
if (!SDL_ConvertAudioSamples(&spec, data, len, &cvtspec, &dst_buf, &dst_len)) {
SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "failed to convert samples: %s", SDL_GetError());
ret = 4;
goto end;
}
/* write out a WAV header... */
io = SDL_IOFromFile(file_out, "wb");
if (!io) {
SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "opening '%s' failed: %s", file_out, SDL_GetError());
ret = 5;
goto end;
}
bitsize = SDL_AUDIO_BITSIZE(spec.format);
blockalign = (bitsize / 8) * cvtspec.channels;
avgbytes = cvtspec.freq * blockalign;
SDL_WriteU32LE(io, 0x46464952); /* RIFF */
SDL_WriteU32LE(io, dst_len + 36);
SDL_WriteU32LE(io, 0x45564157); /* WAVE */
SDL_WriteU32LE(io, 0x20746D66); /* fmt */
SDL_WriteU32LE(io, 16); /* chunk size */
SDL_WriteU16LE(io, SDL_AUDIO_ISFLOAT(spec.format) ? 3 : 1); /* uncompressed */
SDL_WriteU16LE(io, (Uint16)cvtspec.channels); /* channels */
SDL_WriteU32LE(io, cvtspec.freq); /* sample rate */
SDL_WriteU32LE(io, avgbytes); /* average bytes per second */
SDL_WriteU16LE(io, (Uint16)blockalign); /* block align */
SDL_WriteU16LE(io, (Uint16)bitsize); /* significant bits per sample */
SDL_WriteU32LE(io, 0x61746164); /* data */
SDL_WriteU32LE(io, dst_len); /* size */
SDL_WriteIO(io, dst_buf, dst_len);
if (!SDL_CloseIO(io)) {
SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "closing '%s' failed: %s", file_out, SDL_GetError());
ret = 6;
goto end;
}
end:
SDL_free(dst_buf);
SDL_free(data);
SDL_DestroyAudioStream(stream);
SDL_Quit();
SDLTest_CommonDestroyState(state);
return ret;
}
|
