| /* |
| 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> |
| #include "testutils.h" |
| |
| #ifdef __EMSCRIPTEN__ |
| #include <emscripten/emscripten.h> |
| #endif |
| |
| #include <stdlib.h> |
| |
| #define SLIDER_WIDTH_PERC 500.f / 600.f |
| #define SLIDER_HEIGHT_PERC 100.f / 480.f |
| |
| static int done; |
| static SDLTest_CommonState *state; |
| |
| static int multiplier = 100; |
| static SDL_FRect slider_area; |
| static SDL_FRect slider_fill_area; |
| static SDL_AudioSpec spec; |
| static SDL_AudioStream *stream; |
| static Uint8 *audio_buf = NULL; |
| static Uint32 audio_len = 0; |
| |
| static void loop(void) |
| { |
| int i; |
| SDL_Event e; |
| int newmultiplier = multiplier; |
| |
| while (SDL_PollEvent(&e)) { |
| SDLTest_CommonEvent(state, &e, &done); |
| #ifdef __EMSCRIPTEN__ |
| if (done) { |
| emscripten_cancel_main_loop(); |
| } |
| #endif |
| 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) { |
| SDL_AudioSpec newspec; |
| 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); |
| } |
| for (i = 0; i < state->num_windows; i++) { |
| SDL_SetWindowTitle(state->windows[i], 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_memcpy(&newspec, &spec, sizeof (spec)); |
| newspec.freq = newfreq; |
| SDL_SetAudioStreamFormat(stream, &newspec, NULL); |
| } |
| |
| /* keep it looping. */ |
| if (SDL_GetAudioStreamAvailable(stream) < ((int) (audio_len / 2))) { |
| SDL_PutAudioStreamData(stream, audio_buf, audio_len); |
| } |
| |
| for (i = 0; i < state->num_windows; i++) { |
| SDL_SetRenderDrawColor(state->renderers[i], 0, 0, 255, 255); |
| SDL_RenderClear(state->renderers[i]); |
| SDL_SetRenderDrawColor(state->renderers[i], 0, 0, 0, 255); |
| SDL_RenderFillRect(state->renderers[i], &slider_area); |
| SDL_SetRenderDrawColor(state->renderers[i], 255, 0, 0, 255); |
| SDL_RenderFillRect(state->renderers[i], &slider_fill_area); |
| SDL_RenderPresent(state->renderers[i]); |
| } |
| } |
| |
| int main(int argc, char *argv[]) |
| { |
| char *filename = NULL; |
| int i; |
| int rc; |
| |
| /* Initialize test framework */ |
| state = SDLTest_CommonCreateState(argv, SDL_INIT_AUDIO | SDL_INIT_VIDEO); |
| 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; |
| } |
| |
| slider_area.x = state->window_w * (1.f - SLIDER_WIDTH_PERC) / 2; |
| slider_area.y = state->window_h * (1.f - SLIDER_HEIGHT_PERC) / 2; |
| slider_area.w = SLIDER_WIDTH_PERC * state->window_w; |
| slider_area.h = SLIDER_HEIGHT_PERC * state->window_h; |
| |
| slider_fill_area = slider_area; |
| slider_fill_area.w /= 2; |
| |
| /* Load the SDL library */ |
| if (!SDLTest_CommonInit(state)) { |
| SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Couldn't initialize SDL: %s\n", SDL_GetError()); |
| return 1; |
| } |
| |
| filename = GetResourceFilename(filename, "sample.wav"); |
| rc = SDL_LoadWAV(filename, &spec, &audio_buf, &audio_len); |
| SDL_free(filename); |
| |
| if (rc < 0) { |
| SDL_Log("Failed to load '%s': %s", filename, SDL_GetError()); |
| SDL_Quit(); |
| return 1; |
| } |
| |
| for (i = 0; i < state->num_windows; i++) { |
| SDL_SetWindowTitle(state->windows[i], "Drag the slider: Normal speed"); |
| } |
| |
| stream = SDL_CreateAudioStream(&spec, &spec); |
| SDL_PutAudioStreamData(stream, audio_buf, audio_len); |
| SDL_BindAudioStream(state->audio_id, stream); |
| |
| #ifdef __EMSCRIPTEN__ |
| emscripten_set_main_loop(loop, 0, 1); |
| #else |
| while (!done) { |
| loop(); |
| } |
| #endif |
| |
| SDL_DestroyAudioStream(stream); |
| SDL_free(audio_buf); |
| SDLTest_CommonQuit(state); |
| SDL_Quit(); |
| return 0; |
| } |
| |