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annotate test/testmultiaudio.c @ 3696:47d923feedb0

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Fixed bug #935 Patrice Mandin Hello, I originally added pth support for threads in SDL 1.2 because on the Atari platform we did not have any thread library. I think pth support could be removed from SDL 1.3 for two reasons: - Atari platform removed - pth does not provides real (preemptive) threads, because it is user space, and expect the application to call one of its function to give CPU to another thread. So it is not exactly useful for applications, that expect threads to run simultaneously.
author Sam Lantinga <slouken@libsdl.org>
date Sun, 24 Jan 2010 20:47:20 +0000
parents 82e60908fab1
children
rev   line source
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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
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15 play_through_once(void *arg, Uint8 * stream, int len)
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16 {
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17 callback_data *cbd = (callback_data *) arg;
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18 Uint8 *waveptr = sound + cbd->soundpos;
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19 int waveleft = soundlen - cbd->soundpos;
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20 int cpy = len;
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21 if (cpy > waveleft)
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22 cpy = waveleft;
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23
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24 SDL_memcpy(stream, waveptr, cpy);
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25 len -= cpy;
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26 cbd->soundpos += cpy;
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27 if (len > 0) {
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28 stream += cpy;
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29 SDL_memset(stream, spec.silence, len);
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30 cbd->done++;
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31 }
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32 }
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33
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34 static void
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35 test_multi_audio(int devcount)
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36 {
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37 callback_data cbd[64];
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38 int keep_going = 1;
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39 int i;
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40
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41 if (devcount > 64) {
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42 fprintf(stderr, "Too many devices (%d), clamping to 64...\n",
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43 devcount);
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44 devcount = 64;
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45 }
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46
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47 spec.callback = play_through_once;
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48
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49 for (i = 0; i < devcount; i++) {
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50 const char *devname = SDL_GetAudioDeviceName(i, 0);
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51 printf("playing on device #%d: ('%s')...", i, devname);
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52 fflush(stdout);
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53
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54 SDL_memset(&cbd[0], '\0', sizeof(callback_data));
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55 spec.userdata = &cbd[0];
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56 cbd[0].dev = SDL_OpenAudioDevice(devname, 0, &spec, NULL, 0);
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57 if (cbd[0].dev == 0) {
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58 printf("\nOpen device failed: %s\n", SDL_GetError());
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59 } else {
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60 SDL_PauseAudioDevice(cbd[0].dev, 0);
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61 while (!cbd[0].done)
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62 SDL_Delay(100);
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63 SDL_PauseAudioDevice(cbd[0].dev, 1);
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64 printf("done.\n");
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65 SDL_CloseAudioDevice(cbd[0].dev);
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66 }
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67 }
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68
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69 SDL_memset(cbd, '\0', sizeof(cbd));
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70
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71 printf("playing on all devices...\n");
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72 for (i = 0; i < devcount; i++) {
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73 const char *devname = SDL_GetAudioDeviceName(i, 0);
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74 spec.userdata = &cbd[i];
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75 cbd[i].dev = SDL_OpenAudioDevice(devname, 0, &spec, NULL, 0);
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76 if (cbd[i].dev == 0) {
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77 printf("Open device %d failed: %s\n", i, SDL_GetError());
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78 }
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79 }
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80
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81 for (i = 0; i < devcount; i++) {
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82 if (cbd[i].dev) {
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83 SDL_PauseAudioDevice(cbd[i].dev, 0);
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84 }
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85 }
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86
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87 while (keep_going) {
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88 keep_going = 0;
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89 for (i = 0; i < devcount; i++) {
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90 if ((cbd[i].dev) && (!cbd[i].done)) {
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91 keep_going = 1;
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92 }
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93 }
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94 SDL_Delay(100);
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95 }
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96
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97 for (i = 0; i < devcount; i++) {
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98 if (cbd[i].dev) {
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99 SDL_PauseAudioDevice(cbd[i].dev, 1);
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100 SDL_CloseAudioDevice(cbd[i].dev);
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101 }
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102 }
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103
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104 printf("All done!\n");
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105 }
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106
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107
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108 int
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109 main(int argc, char **argv)
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110 {
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111 int devcount = 0;
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112
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113 /* Load the SDL library */
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114 if (SDL_Init(SDL_INIT_AUDIO) < 0) {
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115 fprintf(stderr, "Couldn't initialize SDL: %s\n", SDL_GetError());
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116 return (1);
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117 }
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118
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119 printf("Using audio driver: %s\n", SDL_GetCurrentAudioDriver());
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120
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121 devcount = SDL_GetNumAudioDevices(0);
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122 if (devcount < 1) {
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123 fprintf(stderr, "Don't see any specific audio devices!\n");
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124 } else {
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125 if (argv[1] == NULL) {
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126 argv[1] = "sample.wav";
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127 }
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128
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129 /* Load the wave file into memory */
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130 if (SDL_LoadWAV(argv[1], &spec, &sound, &soundlen) == NULL) {
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131 fprintf(stderr, "Couldn't load %s: %s\n", argv[1],
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132 SDL_GetError());
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133 } else {
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134 test_multi_audio(devcount);
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135 SDL_FreeWAV(sound);
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136 }
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137 }
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138
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139 SDL_Quit();
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140 return 0;
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141 }