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comparison test/testmultiaudio.c @ 2049:5f6550e5184f

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Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
author Ryan C. Gordon <icculus@icculus.org>
date Tue, 17 Oct 2006 09:15:21 +0000
parents
children 866052b01ee5
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2048:6067c7f9a672 2049:5f6550e5184f
1 #include "SDL.h"
2
3 static SDL_AudioSpec spec;
4 static Uint8 *sound = NULL; /* Pointer to wave data */
5 static Uint32 soundlen = 0; /* Length of wave data */
6
7 typedef struct
8 {
9 SDL_AudioDeviceID dev;
10 int soundpos;
11 volatile int done;
12 } callback_data;
13
14 void SDLCALL play_through_once(void *arg, Uint8 * stream, int len)
15 {
16 callback_data *cbd = (callback_data *) arg;
17 Uint8 *waveptr = sound + cbd->soundpos;
18 int waveleft = soundlen - cbd->soundpos;
19 int cpy = len;
20 if (cpy > waveleft)
21 cpy = waveleft;
22
23 memcpy(stream, waveptr, cpy);
24 len -= cpy;
25 cbd->soundpos += cpy;
26 if (len > 0) {
27 stream += cpy;
28 memset(stream, spec.silence, len);
29 cbd->done++;
30 }
31 }
32
33 static void test_multi_audio(int devcount)
34 {
35 callback_data cbd[64];
36 int keep_going = 1;
37 int i;
38
39 if (devcount > 64) {
40 fprintf(stderr, "Too many devices (%d), clamping to 64...\n", devcount);
41 devcount = 64;
42 }
43
44 spec.callback = play_through_once;
45
46 for (i = 0; i < devcount; i++) {
47 const char *devname = SDL_GetAudioDeviceName(i, 0);
48 printf("playing on device #%d: ('%s')...", i, devname);
49 fflush(stdout);
50
51 memset(&cbd[0], '\0', sizeof (callback_data));
52 spec.userdata = &cbd[0];
53 cbd[0].dev = SDL_OpenAudioDevice(devname, 0, &spec, NULL);
54 if (cbd[0].dev == 0) {
55 printf("Open device failed: %s\n", SDL_GetError());
56 } else {
57 SDL_PauseAudioDevice(cbd[0].dev, 0);
58 while (!cbd[0].done)
59 SDL_Delay(100);
60 SDL_PauseAudioDevice(cbd[0].dev, 1);
61 printf("done.\n");
62 SDL_CloseAudioDevice(cbd[0].dev);
63 }
64 }
65
66 memset(cbd, '\0', sizeof (cbd));
67
68 printf("playing on all devices...\n");
69 for (i = 0; i < devcount; i++) {
70 const char *devname = SDL_GetAudioDeviceName(i, 0);
71 spec.userdata = &cbd[i];
72 cbd[i].dev = SDL_OpenAudioDevice(devname, 0, &spec, NULL);
73 if (cbd[i].dev == 0) {
74 printf("Open device %d failed: %s\n", i, SDL_GetError());
75 }
76 }
77
78 for (i = 0; i < devcount; i++) {
79 if (cbd[i].dev) {
80 SDL_PauseAudioDevice(cbd[i].dev, 0);
81 }
82 }
83
84 while (keep_going) {
85 keep_going = 0;
86 for (i = 0; i < devcount; i++) {
87 if ((cbd[i].dev) && (!cbd[i].done)) {
88 keep_going = 1;
89 }
90 }
91 SDL_Delay(100);
92 }
93
94 for (i = 0; i < devcount; i++) {
95 if (cbd[i].dev) {
96 SDL_PauseAudioDevice(cbd[i].dev, 1);
97 SDL_CloseAudioDevice(cbd[i].dev);
98 }
99 }
100
101 printf("All done!\n");
102 }
103
104
105 int main(int argc, char **argv)
106 {
107 int devcount = 0;
108
109 /* Load the SDL library */
110 if (SDL_Init(SDL_INIT_AUDIO) < 0) {
111 fprintf(stderr, "Couldn't initialize SDL: %s\n", SDL_GetError());
112 return (1);
113 }
114
115 printf("Using audio driver: %s\n", SDL_GetCurrentAudioDriver());
116
117 devcount = SDL_GetNumAudioDevices(0);
118 if (devcount < 1) {
119 fprintf(stderr, "Don't see any specific audio devices!\n");
120 } else {
121 if (argv[1] == NULL) {
122 argv[1] = "sample.wav";
123 }
124
125 /* Load the wave file into memory */
126 if (SDL_LoadWAV(argv[1], &spec, &sound, &soundlen) == NULL) {
127 fprintf(stderr, "Couldn't load %s: %s\n", argv[1], SDL_GetError());
128 } else {
129 test_multi_audio(devcount);
130 SDL_FreeWAV(sound);
131 }
132 }
133
134 SDL_Quit();
135 return 0;
136 }