e14743d1 |
1 | |
2 | /* Program to load a wave file and loop playing it using SDL sound */ |
3 | |
4 | /* loopwaves.c is much more robust in handling WAVE files -- |
5 | This is only for simple WAVEs |
6 | */ |
7 | #include "SDL_config.h" |
8 | |
9 | #include <stdio.h> |
10 | #include <stdlib.h> |
11 | |
12 | #if HAVE_SIGNAL_H |
13 | #include <signal.h> |
14 | #endif |
15 | |
16 | #include "SDL.h" |
17 | #include "SDL_audio.h" |
18 | |
19 | struct { |
20 | SDL_AudioSpec spec; |
21 | Uint8 *sound; /* Pointer to wave data */ |
22 | Uint32 soundlen; /* Length of wave data */ |
23 | int soundpos; /* Current play position */ |
24 | } wave; |
25 | |
26 | |
27 | /* Call this instead of exit(), so we can clean up SDL: atexit() is evil. */ |
28 | static void quit(int rc) |
29 | { |
30 | SDL_Quit(); |
31 | exit(rc); |
32 | } |
33 | |
34 | |
35 | void SDLCALL fillerup(void *unused, Uint8 *stream, int len) |
36 | { |
37 | Uint8 *waveptr; |
38 | int waveleft; |
39 | |
40 | /* Set up the pointers */ |
41 | waveptr = wave.sound + wave.soundpos; |
42 | waveleft = wave.soundlen - wave.soundpos; |
43 | |
44 | /* Go! */ |
45 | while ( waveleft <= len ) { |
46 | SDL_memcpy(stream, waveptr, waveleft); |
47 | stream += waveleft; |
48 | len -= waveleft; |
49 | waveptr = wave.sound; |
50 | waveleft = wave.soundlen; |
51 | wave.soundpos = 0; |
52 | } |
53 | SDL_memcpy(stream, waveptr, len); |
54 | wave.soundpos += len; |
55 | } |
56 | |
57 | static int done = 0; |
58 | void poked(int sig) |
59 | { |
60 | done = 1; |
61 | } |
62 | |
63 | int main(int argc, char *argv[]) |
64 | { |
65 | char name[32]; |
66 | |
67 | /* Load the SDL library */ |
68 | if ( SDL_Init(SDL_INIT_AUDIO) < 0 ) { |
69 | fprintf(stderr, "Couldn't initialize SDL: %s\n",SDL_GetError()); |
70 | return(1); |
71 | } |
72 | if ( argv[1] == NULL ) { |
73 | argv[1] = "sample.wav"; |
74 | } |
75 | /* Load the wave file into memory */ |
76 | if ( SDL_LoadWAV(argv[1], |
77 | &wave.spec, &wave.sound, &wave.soundlen) == NULL ) { |
78 | fprintf(stderr, "Couldn't load %s: %s\n", |
79 | argv[1], SDL_GetError()); |
80 | quit(1); |
81 | } |
82 | |
83 | wave.spec.callback = fillerup; |
84 | #if HAVE_SIGNAL_H |
85 | /* Set the signals */ |
86 | #ifdef SIGHUP |
87 | signal(SIGHUP, poked); |
88 | #endif |
89 | signal(SIGINT, poked); |
90 | #ifdef SIGQUIT |
91 | signal(SIGQUIT, poked); |
92 | #endif |
93 | signal(SIGTERM, poked); |
94 | #endif /* HAVE_SIGNAL_H */ |
95 | |
96 | /* Initialize fillerup() variables */ |
97 | if ( SDL_OpenAudio(&wave.spec, NULL) < 0 ) { |
98 | fprintf(stderr, "Couldn't open audio: %s\n", SDL_GetError()); |
99 | SDL_FreeWAV(wave.sound); |
100 | quit(2); |
101 | } |
102 | SDL_PauseAudio(0); |
103 | |
104 | /* Let the audio run */ |
105 | printf("Using audio driver: %s\n", SDL_AudioDriverName(name, 32)); |
106 | while ( ! done && (SDL_GetAudioStatus() == SDL_AUDIO_PLAYING) ) |
107 | SDL_Delay(1000); |
108 | |
109 | /* Clean up on signal */ |
110 | SDL_CloseAudio(); |
111 | SDL_FreeWAV(wave.sound); |
112 | SDL_Quit(); |
113 | return(0); |
114 | } |