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annotate EXAMPLES/playsound.c @ 42:05e5dc4817a4

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Warning: Breaking API/ABI changes. New optimizations to decouple update loop from number of buffers queued in audio streaming to allow more for more and smaller buffers to be processed in a loop. This also has the benefit for access_data callback buffer sizes not to be dictated by the performance tuning. Note that the Load APIs break and add a new parameter to specify the target number of buffers to queue per update pass. Also, I changed the access_data from ALboolean to ALuint for possible future use since I'm already breaking the API. The motivation for this is for the feature request of allowing for data callbacks on buffer queue to modify the input data right before submission.
author Eric Wing <ewing@anscamobile.com>
date Tue, 30 Aug 2011 19:42:31 -0700
parents eca6f008fad0
children b1e13d5688d1
rev   line source
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1 #include "ALmixer.h"
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2 #include <stdio.h>
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3
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4 #ifdef ALMIXER_COMPILE_WITHOUT_SDL
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5 #if defined(_WIN32)
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6 #define WIN32_LEAN_AND_MEAN
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7 #include <windows.h>
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8 #else
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9 #include <unistd.h>
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10 #endif
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11
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12 static void Internal_Delay(ALuint milliseconds_delay)
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13 {
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14 #if defined(_WIN32)
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15 Sleep(milliseconds_delay);
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16 #else
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17 usleep(milliseconds_delay);
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18 #endif
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19 }
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20 #else
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21 #include "SDL.h"
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22 #define Internal_Delay SDL_Delay
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23 #endif
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24 #define MAX_SOURCES 16
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25
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26 ALboolean g_PlayingAudio[MAX_SOURCES];
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27
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28 void Internal_SoundFinished_CallbackIntercept(ALint which_channel, ALuint al_source, ALmixer_Data* almixer_data, ALboolean finished_naturally, void* user_data)
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29 {
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30 fprintf(stderr, "Channel %d finished\n", which_channel);
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31 g_PlayingAudio[which_channel] = AL_FALSE;
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32 }
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33
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34 int main(int argc, char* argv[])
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35 {
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36 ALint i;
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37 ALboolean still_playing = AL_TRUE;
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38
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39 ALmixer_Data* audio_data[MAX_SOURCES];
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40 if(argc < 1)
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41 {
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42 printf("Pass a sound file (or files) as a parameter\n");
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43 }
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44 else if(argc-1 > MAX_SOURCES)
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45 {
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46 printf("Maximum supported files is %d\n", MAX_SOURCES);
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47 }
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48
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49 ALmixer_Init(22050, 0, 0);
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50
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51 for(i=1; i<argc; i++)
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52 {
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53 if(!(audio_data[i-1]=ALmixer_LoadAll( argv[i], AL_FALSE) ))
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54 {
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55 printf("%s. Quiting program.\n", ALmixer_GetError());
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56 exit(0);
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57 }
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58 }
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59
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60 ALmixer_SetPlaybackFinishedCallback(Internal_SoundFinished_CallbackIntercept, NULL);
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61
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62 for(i=1; i<argc; i++)
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63 {
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64 g_PlayingAudio[i-1] = AL_TRUE;
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65 ALmixer_PlayChannel(i-1, audio_data[i-1], 0);
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66 }
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67
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68 while(still_playing)
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69 {
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70 still_playing = AL_FALSE;
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71 for(i=1; i<argc; i++)
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72 {
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73 still_playing |= g_PlayingAudio[i-1];
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74 }
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75 ALmixer_Update();
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76 Internal_Delay(10);
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77 }
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78
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79 for(i=1; i<argc; i++)
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80 {
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81 ALmixer_FreeData(audio_data[i-1]);
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82 }
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83
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84 ALmixer_Quit();
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85
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86 return 0;
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87 }
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88