Mercurial > sdl-ios-xcode

annotate test/testmultiaudio.c @ 3846:66fb40445587 SDL-ryan-multiple-audio-device

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Removed distinction between "available" and "init" in audio backends, since both had to be checked for success as a pair at the higher level and several of the Available methods were just always-succeed placeholders anyhow. Now the availability check is done in the init code, and the higher level tries all possible drivers until one manages to initialize successfully.
author Ryan C. Gordon <icculus@icculus.org>
date Tue, 17 Oct 2006 09:09:21 +0000
parents 2d77a732bd20
children
rev   line source
3794
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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();
db24e43972ac Test program to play audio to every available device, one at a time, then all
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
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:
diff changeset
136 }