Atlas - testaudiohotplug.c
Home / ext / SDL2 / test Lines: 10 | Size: 5579 bytes [Download] [Show on GitHub] [Search similar files] [Raw] [Raw (proxy)][FILE BEGIN]1/* 2 Copyright (C) 1997-2018 Sam Lantinga <[email protected]> 3 4 This software is provided 'as-is', without any express or implied 5 warranty. In no event will the authors be held liable for any damages 6 arising from the use of this software. 7 8 Permission is granted to anyone to use this software for any purpose, 9 including commercial applications, and to alter it and redistribute it 10 freely. 11*/ 12 13/* Program to test hotplugging of audio devices */ 14 15#include "SDL_config.h" 16 17#include <stdio.h> 18#include <stdlib.h> 19 20#if HAVE_SIGNAL_H 21#include <signal.h> 22#endif 23 24#ifdef __EMSCRIPTEN__ 25#include <emscripten/emscripten.h> 26#endif 27 28#include "SDL.h" 29 30static SDL_AudioSpec spec; 31static Uint8 *sound = NULL; /* Pointer to wave data */ 32static Uint32 soundlen = 0; /* Length of wave data */ 33 34static int posindex = 0; 35static Uint32 positions[64]; 36 37/* Call this instead of exit(), so we can clean up SDL: atexit() is evil. */ 38static void 39quit(int rc) 40{ 41 SDL_Quit(); 42 exit(rc); 43} 44 45void SDLCALL 46fillerup(void *_pos, Uint8 * stream, int len) 47{ 48 Uint32 pos = *((Uint32 *) _pos); 49 Uint8 *waveptr; 50 int waveleft; 51 52 /* Set up the pointers */ 53 waveptr = sound + pos; 54 waveleft = soundlen - pos; 55 56 /* Go! */ 57 while (waveleft <= len) { 58 SDL_memcpy(stream, waveptr, waveleft); 59 stream += waveleft; 60 len -= waveleft; 61 waveptr = sound; 62 waveleft = soundlen; 63 pos = 0; 64 } 65 SDL_memcpy(stream, waveptr, len); 66 pos += len; 67 *((Uint32 *) _pos) = pos; 68} 69 70static int done = 0; 71void 72poked(int sig) 73{ 74 done = 1; 75} 76 77static const char* 78devtypestr(int iscapture) 79{ 80 return iscapture ? "capture" : "output"; 81} 82 83static void 84iteration() 85{ 86 SDL_Event e; 87 SDL_AudioDeviceID dev; 88 while (SDL_PollEvent(&e)) { 89 if (e.type == SDL_QUIT) { 90 done = 1; 91 } else if (e.type == SDL_KEYUP) { 92 if (e.key.keysym.sym == SDLK_ESCAPE) 93 done = 1; 94 } else if (e.type == SDL_AUDIODEVICEADDED) { 95 int index = e.adevice.which; 96 int iscapture = e.adevice.iscapture; 97 const char *name = SDL_GetAudioDeviceName(index, iscapture); 98 if (name != NULL) 99 SDL_Log("New %s audio device at index %u: %s\n", devtypestr(iscapture), (unsigned int) index, name); 100 else { 101 SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Got new %s device at index %u, but failed to get the name: %s\n", 102 devtypestr(iscapture), (unsigned int) index, SDL_GetError()); 103 continue; 104 } 105 if (!iscapture) { 106 positions[posindex] = 0; 107 spec.userdata = &positions[posindex++]; 108 spec.callback = fillerup; 109 dev = SDL_OpenAudioDevice(name, 0, &spec, NULL, 0); 110 if (!dev) { 111 SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Couldn't open '%s': %s\n", name, SDL_GetError()); 112 } else { 113 SDL_Log("Opened '%s' as %u\n", name, (unsigned int) dev); 114 SDL_PauseAudioDevice(dev, 0); 115 } 116 } 117 } else if (e.type == SDL_AUDIODEVICEREMOVED) { 118 dev = (SDL_AudioDeviceID) e.adevice.which; 119 SDL_Log("%s device %u removed.\n", devtypestr(e.adevice.iscapture), (unsigned int) dev); 120 SDL_CloseAudioDevice(dev); 121 } 122 } 123} 124 125#ifdef __EMSCRIPTEN__ 126void 127loop() 128{ 129 if(done) 130 emscripten_cancel_main_loop(); 131 else 132 iteration(); 133} 134#endif 135 136int 137main(int argc, char *argv[]) 138{ 139 int i; 140 char filename[4096]; 141 142 /* Enable standard application logging */ 143 SDL_LogSetPriority(SDL_LOG_CATEGORY_APPLICATION, SDL_LOG_PRIORITY_INFO); 144 145 /* Load the SDL library */ 146 if (SDL_Init(SDL_INIT_VIDEO | SDL_INIT_AUDIO) < 0) { 147 SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Couldn't initialize SDL: %s\n", SDL_GetError()); 148 return (1); 149 } 150 151 /* Some targets (Mac CoreAudio) need an event queue for audio hotplug, so make and immediately hide a window. */ 152 SDL_MinimizeWindow(SDL_CreateWindow("testaudiohotplug", SDL_WINDOWPOS_UNDEFINED, SDL_WINDOWPOS_UNDEFINED, 640, 480, 0)); 153 154 if (argc > 1) { 155 SDL_strlcpy(filename, argv[1], sizeof(filename)); 156 } else { 157 SDL_strlcpy(filename, "sample.wav", sizeof(filename)); 158 } 159 /* Load the wave file into memory */ 160 if (SDL_LoadWAV(filename, &spec, &sound, &soundlen) == NULL) { 161 SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Couldn't load %s: %s\n", filename, SDL_GetError()); 162 quit(1); 163 } 164 165#if HAVE_SIGNAL_H 166 /* Set the signals */ 167#ifdef SIGHUP 168 signal(SIGHUP, poked); 169#endif 170 signal(SIGINT, poked); 171#ifdef SIGQUIT 172 signal(SIGQUIT, poked); 173#endif 174 signal(SIGTERM, poked); 175#endif /* HAVE_SIGNAL_H */ 176 177 /* Show the list of available drivers */ 178 SDL_Log("Available audio drivers:"); 179 for (i = 0; i < SDL_GetNumAudioDrivers(); ++i) { 180 SDL_Log("%i: %s", i, SDL_GetAudioDriver(i)); 181 } 182 183 SDL_Log("Select a driver with the SDL_AUDIODRIVER environment variable.\n"); 184 SDL_Log("Using audio driver: %s\n", SDL_GetCurrentAudioDriver()); 185 186#ifdef __EMSCRIPTEN__ 187 emscripten_set_main_loop(loop, 0, 1); 188#else 189 while (!done) { 190 SDL_Delay(100); 191 iteration(); 192 } 193#endif 194 195 /* Clean up on signal */ 196 /* Quit audio first, then free WAV. This prevents access violations in the audio threads. */ 197 SDL_QuitSubSystem(SDL_INIT_AUDIO); 198 SDL_FreeWAV(sound); 199 SDL_Quit(); 200 return (0); 201} 202 203/* vi: set ts=4 sw=4 expandtab: */ 204[FILE END](C) 2025 0x4248 (C) 2025 4248 Media and 4248 Systems, All part of 0x4248 See LICENCE files for more information. Not all files are by 0x4248 always check Licencing.