keii.dev
1/*
2 Copyright (C) 1997-2024 Sam Lantinga <slouken@libsdl.org>
3
4 This software is provided 'as-is', without any express or implied
5 warranty. In no event will the authors be held liable for any damages
6 arising from the use of this software.
7
8 Permission is granted to anyone to use this software for any purpose,
9 including commercial applications, and to alter it and redistribute it
10 freely.
11*/
12
13/* Program to load a wave file and loop playing it using SDL audio */
14
15/* loopwaves.c is much more robust in handling WAVE files --
16 This is only for simple WAVEs
17*/
18#include <stdlib.h>
19
20#define SDL_MAIN_USE_CALLBACKS 1
21#include <SDL3/SDL.h>
22#include <SDL3/SDL_main.h>
23#include <SDL3/SDL_test.h>
24#include "testutils.h"
25
26static struct
27{
28 SDL_AudioSpec spec;
29 Uint8 *sound; /* Pointer to wave data */
30 Uint32 soundlen; /* Length of wave data */
31} wave;
32
33static SDL_AudioStream *stream;
34static SDLTest_CommonState *state;
35
36static int fillerup(void)
37{
38 const int minimum = (wave.soundlen / SDL_AUDIO_FRAMESIZE(wave.spec)) / 2;
39 if (SDL_GetAudioStreamQueued(stream) < minimum) {
40 SDL_PutAudioStreamData(stream, wave.sound, wave.soundlen);
41 }
42 return SDL_APP_CONTINUE;
43}
44
45SDL_AppResult SDL_AppInit(void **appstate, int argc, char *argv[])
46{
47 int i;
48 char *filename = NULL;
49
50 /* this doesn't have to run very much, so give up tons of CPU time between iterations. */
51 SDL_SetHint(SDL_HINT_MAIN_CALLBACK_RATE, "5");
52
53 /* Initialize test framework */
54 state = SDLTest_CommonCreateState(argv, 0);
55 if (!state) {
56 return SDL_APP_SUCCESS;
57 }
58
59 /* Parse commandline */
60 for (i = 1; i < argc;) {
61 int consumed;
62
63 consumed = SDLTest_CommonArg(state, i);
64 if (!consumed) {
65 if (!filename) {
66 filename = argv[i];
67 consumed = 1;
68 }
69 }
70 if (consumed <= 0) {
71 static const char *options[] = { "[sample.wav]", NULL };
72 SDLTest_CommonLogUsage(state, argv[0], options);
73 exit(1);
74 }
75
76 i += consumed;
77 }
78
79 /* Load the SDL library */
80 if (!SDL_Init(SDL_INIT_AUDIO | SDL_INIT_EVENTS)) {
81 SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Couldn't initialize SDL: %s\n", SDL_GetError());
82 return SDL_APP_FAILURE;
83 }
84
85 filename = GetResourceFilename(filename, "sample.wav");
86
87 if (!filename) {
88 SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "%s\n", SDL_GetError());
89 return SDL_APP_FAILURE;
90 }
91
92 /* Load the wave file into memory */
93 if (!SDL_LoadWAV(filename, &wave.spec, &wave.sound, &wave.soundlen)) {
94 SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Couldn't load %s: %s\n", filename, SDL_GetError());
95 SDL_free(filename);
96 return SDL_APP_FAILURE;
97 }
98
99 SDL_free(filename);
100
101 /* Show the list of available drivers */
102 SDL_Log("Available audio drivers:");
103 for (i = 0; i < SDL_GetNumAudioDrivers(); ++i) {
104 SDL_Log("%i: %s", i, SDL_GetAudioDriver(i));
105 }
106
107 SDL_Log("Using audio driver: %s\n", SDL_GetCurrentAudioDriver());
108
109 stream = SDL_OpenAudioDeviceStream(SDL_AUDIO_DEVICE_DEFAULT_PLAYBACK, &wave.spec, NULL, NULL);
110 if (!stream) {
111 SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Couldn't create audio stream: %s\n", SDL_GetError());
112 return SDL_APP_FAILURE;
113 }
114
115 SDL_ResumeAudioStreamDevice(stream);
116
117 return SDL_APP_CONTINUE;
118}
119
120SDL_AppResult SDL_AppEvent(void *appstate, SDL_Event *event)
121{
122 return (event->type == SDL_EVENT_QUIT) ? SDL_APP_SUCCESS : SDL_APP_CONTINUE;
123}
124
125SDL_AppResult SDL_AppIterate(void *appstate)
126{
127 return fillerup();
128}
129
130void SDL_AppQuit(void *appstate, SDL_AppResult result)
131{
132 SDL_DestroyAudioStream(stream);
133 SDL_free(wave.sound);
134 SDL_Quit();
135 SDLTest_CommonDestroyState(state);
136}
137