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

2023-07-25 22:27:55 +02:00
parent b38ea75e56 dec0d4ec41
commit b8e444eaa8
1663 changed files with 627495 additions and 0 deletions
--- a/external/sdl/SDL/test/testaudiostreamdynamicresample.c
+++ b/external/sdl/SDL/test/testaudiostreamdynamicresample.c
@ -0,0 +1,123 @@
+/*
+  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.
+*/
+
+/* !!! FIXME: this code is not up to standards for SDL3 test apps. Someone should improve this. */
+
+#include <SDL3/SDL.h>
+#include <SDL3/SDL_main.h>
+#include <SDL3/SDL_test.h>
+
+static void SDLCALL audio_callback(void *userdata, Uint8 * stream, int len)
+{
+    SDL_AudioStream *audiostream = (SDL_AudioStream *) userdata;
+    SDL_memset(stream, 0, len);
+    SDL_GetAudioStreamData(audiostream, stream, len);
+}
+
+int main(int argc, char *argv[])
+{
+    SDL_Window *window;
+    SDL_Renderer *renderer;
+    SDL_bool done = SDL_FALSE;
+    const SDL_FRect slider_area = { (640 - 500) / 2, (480 - 100) / 2, 500, 100 };
+    SDL_FRect slider_fill_area = slider_area;
+    int multiplier = 100;
+    SDL_AudioSpec spec;
+    Uint8 *audio_buf = NULL;
+    Uint32 audio_len = 0;
+    SDL_AudioStream *stream;
+    SDL_AudioDeviceID device;
+
+    SDL_Init(SDL_INIT_VIDEO | SDL_INIT_AUDIO);
+    window = SDL_CreateWindow("Drag the slider: Normal speed", 640, 480, 0);
+    renderer = SDL_CreateRenderer(window, NULL, 0);
+
+    SDL_LoadWAV("sample.wav", &spec, &audio_buf, &audio_len);
+    stream = SDL_CreateAudioStream(spec.format, spec.channels, spec.freq, spec.format, spec.channels, spec.freq);
+    SDL_PutAudioStreamData(stream, audio_buf, audio_len);
+    spec.callback = audio_callback;
+    spec.userdata = stream;
+    device = SDL_OpenAudioDevice(NULL, SDL_FALSE, &spec, NULL, 0);
+    SDL_PlayAudioDevice(device);
+
+    slider_fill_area.w /= 2;
+
+    while (!done) {
+        SDL_Event e;
+        int newmultiplier = multiplier;
+        while (SDL_PollEvent(&e)) {
+            if (e.type == SDL_EVENT_QUIT) {
+                done = 1;
+            } else if (e.type == SDL_EVENT_KEY_DOWN) {
+                if (e.key.keysym.sym == SDLK_ESCAPE) {
+                    done = 1;
+                }
+            } else if (e.type == SDL_EVENT_MOUSE_MOTION) {
+                if (e.motion.state & SDL_BUTTON_LMASK) {
+                    const SDL_FPoint p = { e.motion.x, e.motion.y };
+                    if (SDL_PointInRectFloat(&p, &slider_area)) {
+                        const float w = SDL_roundf(p.x - slider_area.x);
+                        slider_fill_area.w = w;
+                        newmultiplier = ((int) ((w / slider_area.w) * 800.0f)) - 400;
+                    }
+                }
+            }
+        }
+
+        if (multiplier != newmultiplier) {
+            char title[64];
+            int newfreq = spec.freq;
+
+            multiplier = newmultiplier;
+            if (multiplier == 0) {
+                SDL_snprintf(title, sizeof (title), "Drag the slider: Normal speed");
+            } else if (multiplier < 0) {
+                SDL_snprintf(title, sizeof (title), "Drag the slider: %.2fx slow", (-multiplier / 100.0f) + 1.0f);
+            } else {
+                SDL_snprintf(title, sizeof (title), "Drag the slider: %.2fx fast", (multiplier / 100.0f) + 1.0f);
+            }
+            SDL_SetWindowTitle(window, title);
+
+            /* this math sucks, but whatever. */
+            if (multiplier < 0) {
+                newfreq = spec.freq + (int) ((spec.freq * (multiplier / 400.0f)) * 0.75f);
+            } else if (multiplier > 0) {
+                newfreq = spec.freq + (int) (spec.freq * (multiplier / 100.0f));
+            }
+            /* SDL_Log("newfreq=%d   multiplier=%d\n", newfreq, multiplier); */
+            SDL_LockAudioDevice(device);
+            SDL_SetAudioStreamFormat(stream, spec.format, spec.channels, newfreq, spec.format, spec.channels, spec.freq);
+            SDL_UnlockAudioDevice(device);
+        }
+
+        /* keep it looping. */
+        if (SDL_GetAudioStreamAvailable(stream) < (1024 * 100)) {
+            SDL_PutAudioStreamData(stream, audio_buf, audio_len);
+        }
+
+        SDL_SetRenderDrawColor(renderer, 0, 0, 255, 255);
+        SDL_RenderClear(renderer);
+        SDL_SetRenderDrawColor(renderer, 0, 0, 0, 255);
+        SDL_RenderFillRect(renderer, &slider_area);
+        SDL_SetRenderDrawColor(renderer, 255, 0, 0, 255);
+        SDL_RenderFillRect(renderer, &slider_fill_area);
+        SDL_RenderPresent(renderer);
+    }
+
+    SDL_DestroyRenderer(renderer);
+    SDL_DestroyWindow(window);
+    SDL_CloseAudioDevice(device);
+    SDL_free(audio_buf);
+    SDL_Quit();
+    return 0;
+}
+