Mercurial > sdl-ios-xcode

annotate test/testmultiaudio.c @ 3807:da371472162f SDL-ryan-multiple-audio-device

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DART allegedly does up to quad output.
author Ryan C. Gordon <icculus@icculus.org>
date Wed, 04 Oct 2006 22:51:30 +0000
parents 2d77a732bd20
children
rev   line source
3794
db24e43972ac Test program to play audio to every available device, one at a time, then all
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1 #include "SDL.h"
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2
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3 static SDL_AudioSpec spec;
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4 static Uint8 *sound = NULL; /* Pointer to wave data */
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5 static Uint32 soundlen = 0; /* Length of wave data */
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6
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7 typedef struct
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8 {
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9 SDL_AudioDeviceID dev;
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10 int soundpos;
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11 volatile int done;
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12 } callback_data;
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13
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14 void SDLCALL play_through_once(void *arg, Uint8 * stream, int len)
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15 {
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16 callback_data *cbd = (callback_data *) arg;
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17 Uint8 *waveptr = sound + cbd->soundpos;
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18 int waveleft = soundlen - cbd->soundpos;
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19 int cpy = len;
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20 if (cpy > waveleft)
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21 cpy = waveleft;
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22
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23 memcpy(stream, waveptr, cpy);
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24 len -= cpy;
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25 cbd->soundpos += cpy;
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26 if (len > 0) {
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27 stream += cpy;
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28 memset(stream, spec.silence, len);
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29 cbd->done++;
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30 }
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31 }
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32
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33 static void test_multi_audio(int devcount)
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34 {
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35 callback_data cbd[64];
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36 int keep_going = 1;
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37 int i;
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38
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39 if (devcount > 64) {
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40 fprintf(stderr, "Too many devices (%d), clamping to 64...\n", devcount);
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41 devcount = 64;
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42 }
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43
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44 spec.callback = play_through_once;
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45
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46 for (i = 0; i < devcount; i++) {
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47 const char *devname = SDL_GetAudioDeviceName(i, 0);
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48 printf("playing on device #%d: ('%s')...", i, devname);
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49 fflush(stdout);
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50
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51 memset(&cbd[0], '\0', sizeof (callback_data));
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52 spec.userdata = &cbd[0];
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53 cbd[0].dev = SDL_OpenAudioDevice(devname, 0, &spec, NULL);
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54 if (cbd[0].dev == 0) {
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55 printf("Open device failed: %s\n", SDL_GetError());
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56 } else {
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57 SDL_PauseAudioDevice(cbd[0].dev, 0);
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58 while (!cbd[0].done)
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59 SDL_Delay(100);
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60 SDL_PauseAudioDevice(cbd[0].dev, 1);
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61 printf("done.\n");
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62 SDL_CloseAudioDevice(cbd[0].dev);
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63 }
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64 }
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65
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66 memset(cbd, '\0', sizeof (cbd));
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67
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68 printf("playing on all devices...\n");
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69 for (i = 0; i < devcount; i++) {
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70 const char *devname = SDL_GetAudioDeviceName(i, 0);
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71 spec.userdata = &cbd[i];
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72 cbd[i].dev = SDL_OpenAudioDevice(devname, 0, &spec, NULL);
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73 if (cbd[i].dev == 0) {
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74 printf("Open device %d failed: %s\n", i, SDL_GetError());
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75 }
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76 }
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77
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78 for (i = 0; i < devcount; i++) {
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79 if (cbd[i].dev) {
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80 SDL_PauseAudioDevice(cbd[i].dev, 0);
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81 }
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82 }
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83
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84 while (keep_going) {
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85 keep_going = 0;
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86 for (i = 0; i < devcount; i++) {
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87 if ((cbd[i].dev) && (!cbd[i].done)) {
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88 keep_going = 1;
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89 }
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90 }
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91 SDL_Delay(100);
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92 }
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93
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94 for (i = 0; i < devcount; i++) {
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95 if (cbd[i].dev) {
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96 SDL_PauseAudioDevice(cbd[i].dev, 1);
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97 SDL_CloseAudioDevice(cbd[i].dev);
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98 }
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99 }
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100
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101 printf("All done!\n");
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102 }
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103
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104
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105 int main(int argc, char **argv)
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106 {
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107 int devcount = 0;
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108
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109 /* Load the SDL library */
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110 if (SDL_Init(SDL_INIT_AUDIO) < 0) {
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111 fprintf(stderr, "Couldn't initialize SDL: %s\n", SDL_GetError());
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112 return (1);
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113 }
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114
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115 printf("Using audio driver: %s\n", SDL_GetCurrentAudioDriver());
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116
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117 devcount = SDL_GetNumAudioDevices(0);
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118 if (devcount < 1) {
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119 fprintf(stderr, "Don't see any specific audio devices!\n");
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120 } else {
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121 if (argv[1] == NULL) {
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122 argv[1] = "sample.wav";
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123 }
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124
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125 /* Load the wave file into memory */
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126 if (SDL_LoadWAV(argv[1], &spec, &sound, &soundlen) == NULL) {
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127 fprintf(stderr, "Couldn't load %s: %s\n", argv[1], SDL_GetError());
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128 } else {
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129 test_multi_audio(devcount);
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130 SDL_FreeWAV(sound);
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131 }
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132 }
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133
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134 SDL_Quit();
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135 return 0;
db24e43972ac Test program to play audio to every available device, one at a time, then all
Ryan C. Gordon <icculus@icculus.org>
parents:
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136 }