Merge commit 'dec0d4ec4153bf9fc2b78ae6c2df45b6ea8dde7a' as 'external/sdl/SDL'

external/sdl/SDL/test/loopwave.c

@@ -0,0 +1,210 @@
+/*
+  Copyright (C) 1997-2023 Sam Lantinga <slouken@libsdl.org>
+
+  This software is provided 'as-is', without any express or implied
+  warranty.  In no event will the authors be held liable for any damages
+  arising from the use of this software.
+
+  Permission is granted to anyone to use this software for any purpose,
+  including commercial applications, and to alter it and redistribute it
+  freely.
+*/
+
+/* Program to load a wave file and loop playing it using SDL audio */
+
+/* loopwaves.c is much more robust in handling WAVE files --
+    This is only for simple WAVEs
+*/
+#include <stdlib.h>
+
+#ifdef __EMSCRIPTEN__
+#include <emscripten/emscripten.h>
+#endif
+
+#include <SDL3/SDL.h>
+#include <SDL3/SDL_main.h>
+#include <SDL3/SDL_test.h>
+#include "testutils.h"
+
+static struct
+{
+    SDL_AudioSpec spec;
+    Uint8 *sound;    /* Pointer to wave data */
+    Uint32 soundlen; /* Length of wave data */
+    int soundpos;    /* Current play position */
+} wave;
+
+static SDL_AudioDeviceID device;
+
+/* Call this instead of exit(), so we can clean up SDL: atexit() is evil. */
+static void
+quit(int rc)
+{
+    SDL_Quit();
+    /* Let 'main()' return normally */
+    if (rc != 0) {
+        exit(rc);
+    }
+}
+
+static void
+close_audio(void)
+{
+    if (device != 0) {
+        SDL_CloseAudioDevice(device);
+        device = 0;
+    }
+}
+
+static void
+open_audio(void)
+{
+    /* Initialize fillerup() variables */
+    device = SDL_OpenAudioDevice(NULL, SDL_FALSE, &wave.spec, NULL, 0);
+    if (!device) {
+        SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Couldn't open audio: %s\n", SDL_GetError());
+        SDL_free(wave.sound);
+        quit(2);
+    }
+
+    /* Let the audio run */
+    SDL_PlayAudioDevice(device);
+}
+
+#ifndef __EMSCRIPTEN__
+static void reopen_audio(void)
+{
+    close_audio();
+    open_audio();
+}
+#endif
+
+static void SDLCALL
+fillerup(void *unused, Uint8 *stream, int len)
+{
+    Uint8 *waveptr;
+    int waveleft;
+
+    /* Set up the pointers */
+    waveptr = wave.sound + wave.soundpos;
+    waveleft = wave.soundlen - wave.soundpos;
+
+    /* Go! */
+    while (waveleft <= len) {
+        SDL_memcpy(stream, waveptr, waveleft);
+        stream += waveleft;
+        len -= waveleft;
+        waveptr = wave.sound;
+        waveleft = wave.soundlen;
+        wave.soundpos = 0;
+    }
+    SDL_memcpy(stream, waveptr, len);
+    wave.soundpos += len;
+}
+
+static int done = 0;
+
+#ifdef __EMSCRIPTEN__
+static void loop(void)
+{
+    if (done || (SDL_GetAudioDeviceStatus(device) != SDL_AUDIO_PLAYING)) {
+        emscripten_cancel_main_loop();
+    }
+}
+#endif
+
+int main(int argc, char *argv[])
+{
+    int i;
+    char *filename = NULL;
+    SDLTest_CommonState *state;
+
+    /* Initialize test framework */
+    state = SDLTest_CommonCreateState(argv, 0);
+    if (state == NULL) {
+        return 1;
+    }
+
+    /* Enable standard application logging */
+    SDL_LogSetPriority(SDL_LOG_CATEGORY_APPLICATION, SDL_LOG_PRIORITY_INFO);
+
+    /* Parse commandline */
+    for (i = 1; i < argc;) {
+        int consumed;
+
+        consumed = SDLTest_CommonArg(state, i);
+        if (!consumed) {
+            if (!filename) {
+                filename = argv[i];
+                consumed = 1;
+            }
+        }
+        if (consumed <= 0) {
+            static const char *options[] = { "[sample.wav]", NULL };
+            SDLTest_CommonLogUsage(state, argv[0], options);
+            exit(1);
+        }
+
+        i += consumed;
+    }
+
+    /* Load the SDL library */
+    if (SDL_Init(SDL_INIT_AUDIO | SDL_INIT_EVENTS) < 0) {
+        SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Couldn't initialize SDL: %s\n", SDL_GetError());
+        return 1;
+    }
+
+    filename = GetResourceFilename(filename, "sample.wav");
+
+    if (filename == NULL) {
+        SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "%s\n", SDL_GetError());
+        quit(1);
+    }
+
+    /* Load the wave file into memory */
+    if (SDL_LoadWAV(filename, &wave.spec, &wave.sound, &wave.soundlen) == NULL) {
+        SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Couldn't load %s: %s\n", filename, SDL_GetError());
+        quit(1);
+    }
+
+    wave.spec.callback = fillerup;
+
+    /* Show the list of available drivers */
+    SDL_Log("Available audio drivers:");
+    for (i = 0; i < SDL_GetNumAudioDrivers(); ++i) {
+        SDL_Log("%i: %s", i, SDL_GetAudioDriver(i));
+    }
+
+    SDL_Log("Using audio driver: %s\n", SDL_GetCurrentAudioDriver());
+
+    open_audio();
+
+    SDL_FlushEvents(SDL_EVENT_AUDIO_DEVICE_ADDED, SDL_EVENT_AUDIO_DEVICE_REMOVED);
+
+#ifdef __EMSCRIPTEN__
+    emscripten_set_main_loop(loop, 0, 1);
+#else
+    while (!done) {
+        SDL_Event event;
+
+        while (SDL_PollEvent(&event) > 0) {
+            if (event.type == SDL_EVENT_QUIT) {
+                done = 1;
+            }
+            if ((event.type == SDL_EVENT_AUDIO_DEVICE_ADDED && !event.adevice.iscapture) ||
+                (event.type == SDL_EVENT_AUDIO_DEVICE_REMOVED && !event.adevice.iscapture && event.adevice.which == device)) {
+                reopen_audio();
+            }
+        }
+        SDL_Delay(100);
+    }
+#endif
+
+    /* Clean up on signal */
+    close_audio();
+    SDL_free(wave.sound);
+    SDL_free(filename);
+    SDL_Quit();
+    SDLTest_CommonDestroyState(state);
+    return 0;
+}