450 lines
13 KiB
C
450 lines
13 KiB
C
/*
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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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/* !!! FIXME: this code is not up to standards for SDL3 test apps. Someone should improve this. */
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#include <SDL3/SDL.h>
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#include <SDL3/SDL_main.h>
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#include <SDL3/SDL_test.h>
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#include "testutils.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 <stdlib.h>
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#define SLIDER_WIDTH_PERC 500.f / 600.f
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#define SLIDER_HEIGHT_PERC 70.f / 480.f
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static int done;
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static SDLTest_CommonState *state;
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static SDL_AudioSpec spec;
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static SDL_AudioStream *stream;
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static Uint8 *audio_buf = NULL;
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static Uint32 audio_len = 0;
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static SDL_bool auto_loop = SDL_TRUE;
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static SDL_bool auto_flush = SDL_FALSE;
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static Uint64 last_get_callback = 0;
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static int last_get_amount_additional = 0;
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static int last_get_amount_total = 0;
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typedef struct Slider
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{
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SDL_FRect area;
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SDL_bool changed;
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char fmtlabel[64];
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float pos;
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int flags;
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float min;
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float mid;
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float max;
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float value;
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} Slider;
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#define NUM_SLIDERS 3
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Slider sliders[NUM_SLIDERS];
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static int active_slider = -1;
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static void init_slider(int index, const char* fmtlabel, int flags, float value, float min, float max)
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{
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Slider* slider = &sliders[index];
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slider->area.x = state->window_w * (1.f - SLIDER_WIDTH_PERC) / 2;
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slider->area.y = state->window_h * (0.2f + (index * SLIDER_HEIGHT_PERC * 1.4f));
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slider->area.w = SLIDER_WIDTH_PERC * state->window_w;
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slider->area.h = SLIDER_HEIGHT_PERC * state->window_h;
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slider->changed = SDL_TRUE;
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SDL_strlcpy(slider->fmtlabel, fmtlabel, SDL_arraysize(slider->fmtlabel));
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slider->flags = flags;
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slider->min = min;
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slider->max = max;
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slider->value = value;
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if (slider->flags & 1) {
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slider->pos = (value - slider->min + 0.5f) / (slider->max - slider->min + 1.0f);
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} else {
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slider->pos = 0.5f;
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slider->mid = value;
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}
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}
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static float lerp(float v0, float v1, float t)
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{
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return (1 - t) * v0 + t * v1;
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}
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static void draw_text(SDL_Renderer* renderer, int x, int y, const char* text)
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{
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SDL_SetRenderDrawColor(renderer, 0xFD, 0xF6, 0xE3, 0xFF);
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SDLTest_DrawString(renderer, (float) x, (float) y, text);
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}
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static void draw_textf(SDL_Renderer* renderer, int x, int y, const char* fmt, ...)
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{
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char text[256];
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va_list ap;
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va_start(ap, fmt);
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SDL_vsnprintf(text, SDL_arraysize(text), fmt, ap);
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va_end(ap);
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draw_text(renderer, x, y, text);
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}
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static void queue_audio()
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{
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Uint8* new_data = NULL;
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int new_len = 0;
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int retval = 0;
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SDL_AudioSpec new_spec;
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new_spec.format = spec.format;
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new_spec.channels = (int) sliders[2].value;
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new_spec.freq = (int) sliders[1].value;
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SDL_Log("Converting audio from %i to %i", spec.freq, new_spec.freq);
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retval = retval ? retval : SDL_ConvertAudioSamples(&spec, audio_buf, audio_len, &new_spec, &new_data, &new_len);
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retval = retval ? retval : SDL_SetAudioStreamFormat(stream, &new_spec, NULL);
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retval = retval ? retval : SDL_PutAudioStreamData(stream, new_data, new_len);
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if (auto_flush) {
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retval = retval ? retval : SDL_FlushAudioStream(stream);
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}
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SDL_free(new_data);
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if (retval) {
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SDL_Log("Failed to queue audio: %s", SDL_GetError());
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} else {
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SDL_Log("Queued audio");
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}
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}
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static void skip_audio(float amount)
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{
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float speed;
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SDL_AudioSpec dst_spec, new_spec;
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int num_frames;
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int retval = 0;
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void* buf = NULL;
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SDL_LockAudioStream(stream);
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speed = SDL_GetAudioStreamFrequencyRatio(stream);
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SDL_GetAudioStreamFormat(stream, NULL, &dst_spec);
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/* Gimme that crunchy audio */
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new_spec.format = SDL_AUDIO_S8;
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new_spec.channels = 1;
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new_spec.freq = 4000;
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SDL_SetAudioStreamFrequencyRatio(stream, 100.0f);
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SDL_SetAudioStreamFormat(stream, NULL, &new_spec);
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num_frames = (int)(new_spec.freq * ((speed * amount) / 100.0f));
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buf = SDL_malloc(num_frames);
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if (buf != NULL) {
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retval = SDL_GetAudioStreamData(stream, buf, num_frames);
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SDL_free(buf);
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}
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SDL_SetAudioStreamFormat(stream, NULL, &dst_spec);
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SDL_SetAudioStreamFrequencyRatio(stream, speed);
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SDL_UnlockAudioStream(stream);
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if (retval >= 0) {
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SDL_Log("Skipped %.2f seconds", amount);
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} else {
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SDL_Log("Failed to skip: %s", SDL_GetError());
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}
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}
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static const char *AudioFmtToString(const SDL_AudioFormat fmt)
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{
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switch (fmt) {
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#define FMTCASE(x) case SDL_AUDIO_##x: return #x
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FMTCASE(U8);
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FMTCASE(S8);
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FMTCASE(S16LE);
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FMTCASE(S16BE);
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FMTCASE(S32LE);
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FMTCASE(S32BE);
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FMTCASE(F32LE);
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FMTCASE(F32BE);
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#undef FMTCASE
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}
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return "?";
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}
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static const char *AudioChansToStr(const int channels)
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{
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switch (channels) {
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case 1: return "Mono";
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case 2: return "Stereo";
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case 3: return "2.1";
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case 4: return "Quad";
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case 5: return "4.1";
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case 6: return "5.1";
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case 7: return "6.1";
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case 8: return "7.1";
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default: break;
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}
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return "?";
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}
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static void loop(void)
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{
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int i, j;
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SDL_Event e;
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SDL_FPoint p;
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SDL_AudioSpec src_spec, dst_spec;
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int available_bytes = 0;
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float available_seconds = 0;
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while (SDL_PollEvent(&e)) {
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SDLTest_CommonEvent(state, &e, &done);
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#ifdef __EMSCRIPTEN__
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if (done) {
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emscripten_cancel_main_loop();
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}
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#endif
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if (e.type == SDL_EVENT_KEY_DOWN) {
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SDL_Keycode sym = e.key.keysym.sym;
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if (sym == SDLK_q) {
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if (SDL_AudioDevicePaused(state->audio_id)) {
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SDL_ResumeAudioDevice(state->audio_id);
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} else {
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SDL_PauseAudioDevice(state->audio_id);
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}
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} else if (sym == SDLK_w) {
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auto_loop = auto_loop ? SDL_FALSE : SDL_TRUE;
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} else if (sym == SDLK_e) {
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auto_flush = auto_flush ? SDL_FALSE : SDL_TRUE;
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} else if (sym == SDLK_a) {
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SDL_ClearAudioStream(stream);
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SDL_Log("Cleared audio stream");
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} else if (sym == SDLK_s) {
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queue_audio();
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} else if (sym == SDLK_d) {
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float amount = 1.0f;
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amount *= (e.key.keysym.mod & SDL_KMOD_CTRL) ? 10.0f : 1.0f;
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amount *= (e.key.keysym.mod & SDL_KMOD_SHIFT) ? 10.0f : 1.0f;
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skip_audio(amount);
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}
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}
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}
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if (SDL_GetMouseState(&p.x, &p.y) & SDL_BUTTON_LMASK) {
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if (active_slider == -1) {
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for (i = 0; i < NUM_SLIDERS; ++i) {
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if (SDL_PointInRectFloat(&p, &sliders[i].area)) {
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active_slider = i;
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break;
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}
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}
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}
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} else {
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active_slider = -1;
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}
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if (active_slider != -1) {
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Slider* slider = &sliders[active_slider];
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float value = (p.x - slider->area.x) / slider->area.w;
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value = SDL_clamp(value, 0.0f, 1.0f);
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slider->pos = value;
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if (slider->flags & 1) {
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value = slider->min + (value * (slider->max - slider->min + 1.0f));
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value = SDL_clamp(value, slider->min, slider->max);
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} else {
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value = (value * 2.0f) - 1.0f;
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value = (value >= 0)
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? lerp(slider->mid, slider->max, value)
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: lerp(slider->mid, slider->min, -value);
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}
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if (value != slider->value) {
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slider->value = value;
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slider->changed = SDL_TRUE;
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}
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}
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if (sliders[0].changed) {
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sliders[0].changed = SDL_FALSE;
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SDL_SetAudioStreamFrequencyRatio(stream, sliders[0].value);
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}
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if (SDL_GetAudioStreamFormat(stream, &src_spec, &dst_spec) == 0) {
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available_bytes = SDL_GetAudioStreamAvailable(stream);
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available_seconds = (float)available_bytes / (float)(SDL_AUDIO_FRAMESIZE(dst_spec) * dst_spec.freq);
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/* keep it looping. */
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if (auto_loop && (available_seconds < 10.0f)) {
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queue_audio();
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}
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}
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for (i = 0; i < state->num_windows; i++) {
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int draw_y = 0;
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SDL_Renderer* rend = state->renderers[i];
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SDL_SetRenderDrawColor(rend, 0x00, 0x2B, 0x36, 0xFF);
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SDL_RenderClear(rend);
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for (j = 0; j < NUM_SLIDERS; ++j) {
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Slider* slider = &sliders[j];
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SDL_FRect area;
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SDL_copyp(&area, &slider->area);
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SDL_SetRenderDrawColor(rend, 0x07, 0x36, 0x42, 0xFF);
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SDL_RenderFillRect(rend, &area);
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area.w *= slider->pos;
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SDL_SetRenderDrawColor(rend, 0x58, 0x6E, 0x75, 0xFF);
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SDL_RenderFillRect(rend, &area);
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draw_textf(rend, (int)slider->area.x, (int)slider->area.y, slider->fmtlabel,
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(slider->flags & 2) ? ((float)(int)slider->value) : slider->value);
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}
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draw_textf(rend, 0, draw_y, "%7s, Loop: %3s, Flush: %3s",
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SDL_AudioDevicePaused(state->audio_id) ? "Paused" : "Playing", auto_loop ? "On" : "Off", auto_flush ? "On" : "Off");
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draw_y += FONT_LINE_HEIGHT;
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draw_textf(rend, 0, draw_y, "Available: %4.2f (%i bytes)", available_seconds, available_bytes);
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draw_y += FONT_LINE_HEIGHT;
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SDL_LockAudioStream(stream);
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draw_textf(rend, 0, draw_y, "Get Callback: %i/%i bytes, %2i ms ago",
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last_get_amount_additional, last_get_amount_total, (int)(SDL_GetTicks() - last_get_callback));
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draw_y += FONT_LINE_HEIGHT;
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SDL_UnlockAudioStream(stream);
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draw_y = state->window_h - FONT_LINE_HEIGHT * 3;
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draw_textf(rend, 0, draw_y, "Wav: %6s/%6s/%i",
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AudioFmtToString(spec.format), AudioChansToStr(spec.channels), spec.freq);
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draw_y += FONT_LINE_HEIGHT;
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draw_textf(rend, 0, draw_y, "Src: %6s/%6s/%i",
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AudioFmtToString(src_spec.format), AudioChansToStr(src_spec.channels), src_spec.freq);
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draw_y += FONT_LINE_HEIGHT;
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draw_textf(rend, 0, draw_y, "Dst: %6s/%6s/%i",
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AudioFmtToString(dst_spec.format), AudioChansToStr(dst_spec.channels), dst_spec.freq);
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draw_y += FONT_LINE_HEIGHT;
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SDL_RenderPresent(rend);
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}
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}
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static void SDLCALL our_get_callback(void *userdata, SDL_AudioStream *strm, int additional_amount, int total_amount)
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{
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last_get_callback = SDL_GetTicks();
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last_get_amount_additional = additional_amount;
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last_get_amount_total = total_amount;
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}
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int main(int argc, char *argv[])
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{
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char *filename = NULL;
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int i;
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int rc;
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/* Initialize test framework */
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state = SDLTest_CommonCreateState(argv, SDL_INIT_AUDIO | SDL_INIT_VIDEO);
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if (state == NULL) {
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return 1;
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}
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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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/* Parse commandline */
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for (i = 1; i < argc;) {
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int consumed;
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consumed = SDLTest_CommonArg(state, i);
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if (!consumed) {
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if (!filename) {
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filename = argv[i];
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consumed = 1;
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}
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}
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if (consumed <= 0) {
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static const char *options[] = { "[sample.wav]", NULL };
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SDLTest_CommonLogUsage(state, argv[0], options);
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exit(1);
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}
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i += consumed;
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}
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/* Load the SDL library */
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if (!SDLTest_CommonInit(state)) {
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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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FONT_CHARACTER_SIZE = 16;
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filename = GetResourceFilename(filename, "sample.wav");
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rc = SDL_LoadWAV(filename, &spec, &audio_buf, &audio_len);
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SDL_free(filename);
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if (rc < 0) {
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SDL_Log("Failed to load '%s': %s", filename, SDL_GetError());
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SDL_Quit();
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return 1;
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}
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init_slider(0, "Speed: %3.2fx", 0x0, 1.0f, 0.2f, 5.0f);
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init_slider(1, "Freq: %g", 0x2, (float)spec.freq, 4000.0f, 192000.0f);
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init_slider(2, "Channels: %g", 0x3, (float)spec.channels, 1.0f, 8.0f);
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for (i = 0; i < state->num_windows; i++) {
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SDL_SetWindowTitle(state->windows[i], "Resampler Test");
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}
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stream = SDL_CreateAudioStream(&spec, &spec);
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SDL_SetAudioStreamGetCallback(stream, our_get_callback, NULL);
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SDL_BindAudioStream(state->audio_id, stream);
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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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loop();
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}
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#endif
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SDLTest_CleanupTextDrawing();
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SDL_DestroyAudioStream(stream);
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SDL_free(audio_buf);
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SDLTest_CommonQuit(state);
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return 0;
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}
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