Mercurial > sdl-ios-xcode

annotate test/loopwave.c @ 2824:4dba7aa7ea77

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Added slow but complete blit fallback Don't try to RLE encode surfaces that have alpha channel and alpha modulation Don't turn on blending when converting an RGB surface to RGBA format Do turn on blending when converting colorkey to alpha channel
author Sam Lantinga <slouken@libsdl.org>
date Tue, 02 Dec 2008 17:14:04 +0000
parents 8b76cc268771
children aecbdf3362c3
rev   line source
0
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1
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2 /* Program to load a wave file and loop playing it using SDL sound */
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3
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4 /* loopwaves.c is much more robust in handling WAVE files --
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5 This is only for simple WAVEs
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6 */
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7 #include "SDL_config.h"
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8
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9 #include <stdio.h>
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10 #include <stdlib.h>
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11
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12 #if HAVE_SIGNAL_H
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13 #include <signal.h>
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14 #endif
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15
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16 #include "SDL.h"
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17 #include "SDL_audio.h"
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18
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19 struct
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20 {
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21 SDL_AudioSpec spec;
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22 Uint8 *sound; /* Pointer to wave data */
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23 Uint32 soundlen; /* Length of wave data */
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24 int soundpos; /* Current play position */
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25 } wave;
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26
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27
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28 /* Call this instead of exit(), so we can clean up SDL: atexit() is evil. */
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29 static void
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30 quit(int rc)
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31 {
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32 SDL_Quit();
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33 exit(rc);
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34 }
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35
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36
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37 void SDLCALL
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38 fillerup(void *unused, Uint8 * stream, int len)
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39 {
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40 Uint8 *waveptr;
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41 int waveleft;
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42
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43 /* Set up the pointers */
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44 waveptr = wave.sound + wave.soundpos;
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45 waveleft = wave.soundlen - wave.soundpos;
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46
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47 /* Go! */
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48 while (waveleft <= len) {
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49 SDL_memcpy(stream, waveptr, waveleft);
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50 stream += waveleft;
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51 len -= waveleft;
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52 waveptr = wave.sound;
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53 waveleft = wave.soundlen;
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54 wave.soundpos = 0;
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55 }
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56 SDL_memcpy(stream, waveptr, len);
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57 wave.soundpos += len;
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58 }
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59
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60 static int done = 0;
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61 void
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62 poked(int sig)
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63 {
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64 done = 1;
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65 }
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66
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67 int
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68 main(int argc, char *argv[])
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69 {
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70 /* Load the SDL library */
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71 if (SDL_Init(SDL_INIT_AUDIO) < 0) {
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72 fprintf(stderr, "Couldn't initialize SDL: %s\n", SDL_GetError());
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73 return (1);
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74 }
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75
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76 if (argv[1] == NULL) {
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77 argv[1] = "sample.wav";
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78 }
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79 /* Load the wave file into memory */
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80 if (SDL_LoadWAV(argv[1], &wave.spec, &wave.sound, &wave.soundlen) == NULL) {
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81 fprintf(stderr, "Couldn't load %s: %s\n", argv[1], SDL_GetError());
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82 quit(1);
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83 }
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84
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85 wave.spec.callback = fillerup;
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86 #if HAVE_SIGNAL_H
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87 /* Set the signals */
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88 #ifdef SIGHUP
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89 signal(SIGHUP, poked);
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90 #endif
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91 signal(SIGINT, poked);
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92 #ifdef SIGQUIT
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93 signal(SIGQUIT, poked);
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94 #endif
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95 signal(SIGTERM, poked);
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96 #endif /* HAVE_SIGNAL_H */
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97
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98 /* Initialize fillerup() variables */
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99 if (SDL_OpenAudio(&wave.spec, NULL) < 0) {
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100 fprintf(stderr, "Couldn't open audio: %s\n", SDL_GetError());
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101 SDL_FreeWAV(wave.sound);
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102 quit(2);
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103 }
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104 SDL_PauseAudio(0);
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105
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106 /* Let the audio run */
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107 while (!done && (SDL_GetAudioStatus() == SDL_AUDIO_PLAYING))
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108 SDL_Delay(1000);
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109
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110 /* Clean up on signal */
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111 SDL_CloseAudio();
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112 SDL_FreeWAV(wave.sound);
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113 SDL_Quit();
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114 return (0);
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115 }