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

external/sdl/SDL/test/testaudiocapture.c

@@ -0,0 +1,208 @@
+/*
+  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.
+*/
+
+#include <stdlib.h>
+
+#include <SDL3/SDL.h>
+#include <SDL3/SDL_main.h>
+#include <SDL3/SDL_test.h>
+
+#ifdef __EMSCRIPTEN__
+#include <emscripten/emscripten.h>
+#endif
+
+static SDL_Window *window = NULL;
+static SDL_Renderer *renderer = NULL;
+static SDL_AudioSpec spec;
+static SDL_AudioDeviceID devid_in = 0;
+static SDL_AudioDeviceID devid_out = 0;
+static int done = 0;
+
+static void loop(void)
+{
+    SDL_bool please_quit = SDL_FALSE;
+    SDL_Event e;
+
+    while (SDL_PollEvent(&e)) {
+        if (e.type == SDL_EVENT_QUIT) {
+            please_quit = SDL_TRUE;
+        } else if (e.type == SDL_EVENT_KEY_DOWN) {
+            if (e.key.keysym.sym == SDLK_ESCAPE) {
+                please_quit = SDL_TRUE;
+            }
+        } else if (e.type == SDL_EVENT_MOUSE_BUTTON_DOWN) {
+            if (e.button.button == 1) {
+                SDL_PauseAudioDevice(devid_out);
+                SDL_PlayAudioDevice(devid_in);
+            }
+        } else if (e.type == SDL_EVENT_MOUSE_BUTTON_UP) {
+            if (e.button.button == 1) {
+                SDL_PauseAudioDevice(devid_in);
+                SDL_PlayAudioDevice(devid_out);
+            }
+        }
+    }
+
+    if (SDL_GetAudioDeviceStatus(devid_in) == SDL_AUDIO_PLAYING) {
+        SDL_SetRenderDrawColor(renderer, 0, 255, 0, 255);
+    } else {
+        SDL_SetRenderDrawColor(renderer, 255, 0, 0, 255);
+    }
+    SDL_RenderClear(renderer);
+    SDL_RenderPresent(renderer);
+
+    if (please_quit) {
+        /* stop playing back, quit. */
+        SDL_Log("Shutting down.\n");
+        SDL_PauseAudioDevice(devid_in);
+        SDL_CloseAudioDevice(devid_in);
+        SDL_PauseAudioDevice(devid_out);
+        SDL_CloseAudioDevice(devid_out);
+        SDL_DestroyRenderer(renderer);
+        SDL_DestroyWindow(window);
+        SDL_Quit();
+#ifdef __EMSCRIPTEN__
+        emscripten_cancel_main_loop();
+#endif
+        /* Let 'main()' return normally */
+        done = 1;
+        return;
+    }
+
+    /* Note that it would be easier to just have a one-line function that
+        calls SDL_QueueAudio() as a capture device callback, but we're
+        trying to test the API, so we use SDL_DequeueAudio() here. */
+    while (SDL_TRUE) {
+        Uint8 buf[1024];
+        const Uint32 br = SDL_DequeueAudio(devid_in, buf, sizeof(buf));
+        SDL_QueueAudio(devid_out, buf, br);
+        if (br < sizeof(buf)) {
+            break;
+        }
+    }
+}
+
+int main(int argc, char **argv)
+{
+    /* (NULL means "open default device.") */
+    const char *devname = NULL;
+    SDL_AudioSpec wanted;
+    int devcount;
+    int i;
+    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 (!devname) {
+                devname = argv[i];
+                consumed = 1;
+            }
+        }
+        if (consumed <= 0) {
+            static const char *options[] = { "[driver_name]", NULL };
+            SDLTest_CommonLogUsage(state, argv[0], options);
+            exit(1);
+        }
+
+        i += consumed;
+    }
+
+    /* Load the SDL library */
+    if (SDL_Init(SDL_INIT_VIDEO | SDL_INIT_AUDIO) < 0) {
+        SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Couldn't initialize SDL: %s\n", SDL_GetError());
+        return 1;
+    }
+
+    if (SDL_CreateWindowAndRenderer(320, 240, 0, &window, &renderer) < 0) {
+        SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Couldn't create SDL window and renderer: %s\n", SDL_GetError());
+        return 1;
+    }
+    SDL_SetRenderDrawColor(renderer, 0, 0, 0, 255);
+    SDL_RenderClear(renderer);
+    SDL_RenderPresent(renderer);
+
+    SDL_Log("Using audio driver: %s\n", SDL_GetCurrentAudioDriver());
+
+    devcount = SDL_GetNumAudioDevices(SDL_TRUE);
+    for (i = 0; i < devcount; i++) {
+        SDL_Log(" Capture device #%d: '%s'\n", i, SDL_GetAudioDeviceName(i, SDL_TRUE));
+    }
+
+    SDL_zero(wanted);
+    wanted.freq = 44100;
+    wanted.format = SDL_AUDIO_F32SYS;
+    wanted.channels = 1;
+    wanted.samples = 4096;
+    wanted.callback = NULL;
+
+    SDL_zero(spec);
+
+    /* DirectSound can fail in some instances if you open the same hardware
+       for both capture and output and didn't open the output end first,
+       according to the docs, so if you're doing something like this, always
+       open your capture devices second in case you land in those bizarre
+       circumstances. */
+
+    SDL_Log("Opening default playback device...\n");
+    devid_out = SDL_OpenAudioDevice(NULL, SDL_FALSE, &wanted, &spec, SDL_AUDIO_ALLOW_ANY_CHANGE);
+    if (!devid_out) {
+        SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Couldn't open an audio device for playback: %s!\n", SDL_GetError());
+        SDL_Quit();
+        exit(1);
+    }
+
+    SDL_Log("Opening capture device %s%s%s...\n",
+            devname ? "'" : "",
+            devname ? devname : "[[default]]",
+            devname ? "'" : "");
+
+    devid_in = SDL_OpenAudioDevice(devname, SDL_TRUE, &spec, &spec, 0);
+    if (!devid_in) {
+        SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Couldn't open an audio device for capture: %s!\n", SDL_GetError());
+        SDL_Quit();
+        exit(1);
+    }
+
+    SDL_Log("Ready! Hold down mouse or finger to record!\n");
+
+#ifdef __EMSCRIPTEN__
+    emscripten_set_main_loop(loop, 0, 1);
+#else
+    while (!done) {
+        loop();
+        if (!done) {
+            SDL_Delay(16);
+        }
+    }
+#endif
+
+    /* SDL_DestroyRenderer(renderer); */
+    /* SDL_DestroyWindow(window); */
+
+    /* SDL_Quit(); */
+    /* SDLTest_CommonDestroyState(state); */
+
+    return 0;
+}