🛠️🐜 Antkeeper superbuild with dependencies included
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182 lines
4.3 KiB
182 lines
4.3 KiB
/*
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Copyright (C) 1997-2023 Sam Lantinga <slouken@libsdl.org>
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This software is provided 'as-is', without any express or implied
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warranty. In no event will the authors be held liable for any damages
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arising from the use of this software.
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Permission is granted to anyone to use this software for any purpose,
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including commercial applications, and to alter it and redistribute it
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freely.
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*/
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/* Program to load a wave file and loop playing it using SDL audio */
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/* loopwaves.c is much more robust in handling WAVE files --
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This is only for simple WAVEs
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*/
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#include "SDL_config.h"
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#include <stdio.h>
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#include <stdlib.h>
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#ifdef __EMSCRIPTEN__
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#include <emscripten/emscripten.h>
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#endif
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#include "SDL.h"
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#include "testutils.h"
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static struct
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{
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SDL_AudioSpec spec;
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Uint8 *sound; /* Pointer to wave data */
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Uint32 soundlen; /* Length of wave data */
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int soundpos; /* Current play position */
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} wave;
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static SDL_AudioDeviceID device;
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/* Call this instead of exit(), so we can clean up SDL: atexit() is evil. */
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static void
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quit(int rc)
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{
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SDL_Quit();
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exit(rc);
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}
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static void
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close_audio()
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{
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if (device != 0) {
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SDL_CloseAudioDevice(device);
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device = 0;
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}
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}
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static void
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open_audio()
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{
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/* Initialize fillerup() variables */
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device = SDL_OpenAudioDevice(NULL, SDL_FALSE, &wave.spec, NULL, 0);
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if (!device) {
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SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Couldn't open audio: %s\n", SDL_GetError());
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SDL_FreeWAV(wave.sound);
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quit(2);
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}
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/* Let the audio run */
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SDL_PauseAudioDevice(device, SDL_FALSE);
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}
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#ifndef __EMSCRIPTEN__
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static void reopen_audio()
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{
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close_audio();
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open_audio();
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}
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#endif
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void SDLCALL
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fillerup(void *unused, Uint8 *stream, int len)
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{
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Uint8 *waveptr;
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int waveleft;
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/* Set up the pointers */
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waveptr = wave.sound + wave.soundpos;
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waveleft = wave.soundlen - wave.soundpos;
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/* Go! */
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while (waveleft <= len) {
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SDL_memcpy(stream, waveptr, waveleft);
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stream += waveleft;
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len -= waveleft;
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waveptr = wave.sound;
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waveleft = wave.soundlen;
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wave.soundpos = 0;
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}
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SDL_memcpy(stream, waveptr, len);
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wave.soundpos += len;
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}
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static int done = 0;
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#ifdef __EMSCRIPTEN__
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void loop()
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{
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if (done || (SDL_GetAudioDeviceStatus(device) != SDL_AUDIO_PLAYING)) {
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emscripten_cancel_main_loop();
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}
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}
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#endif
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int main(int argc, char *argv[])
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{
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int i;
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char *filename = NULL;
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/* Enable standard application logging */
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SDL_LogSetPriority(SDL_LOG_CATEGORY_APPLICATION, SDL_LOG_PRIORITY_INFO);
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/* Load the SDL library */
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if (SDL_Init(SDL_INIT_AUDIO | SDL_INIT_EVENTS) < 0) {
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SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Couldn't initialize SDL: %s\n", SDL_GetError());
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return 1;
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}
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filename = GetResourceFilename(argc > 1 ? argv[1] : NULL, "sample.wav");
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if (filename == NULL) {
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SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "%s\n", SDL_GetError());
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quit(1);
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}
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/* Load the wave file into memory */
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if (SDL_LoadWAV(filename, &wave.spec, &wave.sound, &wave.soundlen) == NULL) {
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SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Couldn't load %s: %s\n", filename, SDL_GetError());
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quit(1);
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}
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wave.spec.callback = fillerup;
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/* Show the list of available drivers */
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SDL_Log("Available audio drivers:");
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for (i = 0; i < SDL_GetNumAudioDrivers(); ++i) {
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SDL_Log("%i: %s", i, SDL_GetAudioDriver(i));
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}
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SDL_Log("Using audio driver: %s\n", SDL_GetCurrentAudioDriver());
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open_audio();
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SDL_FlushEvents(SDL_AUDIODEVICEADDED, SDL_AUDIODEVICEREMOVED);
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#ifdef __EMSCRIPTEN__
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emscripten_set_main_loop(loop, 0, 1);
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#else
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while (!done) {
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SDL_Event event;
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while (SDL_PollEvent(&event) > 0) {
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if (event.type == SDL_QUIT) {
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done = 1;
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}
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if ((event.type == SDL_AUDIODEVICEADDED && !event.adevice.iscapture) ||
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(event.type == SDL_AUDIODEVICEREMOVED && !event.adevice.iscapture && event.adevice.which == device)) {
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reopen_audio();
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}
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}
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SDL_Delay(100);
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}
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#endif
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/* Clean up on signal */
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close_audio();
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SDL_FreeWAV(wave.sound);
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SDL_free(filename);
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SDL_Quit();
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return 0;
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}
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/* vi: set ts=4 sw=4 expandtab: */
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