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source: orxonox.OLD/orxonox/branches/sound/src/mixer2.cpp @ 3306

Last change on this file since 3306 was 2777, checked in by simon, 20 years ago
/branches/sound: brought up sound_control.cc which doesn't do anything at the moment.
Property svn:executable set to ``*
File size: 4.9 KB

Rev	Line
[2777]	1	#include "SDL.h"
	2	#include "SDL_thread.h"
	3	#include "SDL_mixer.h"
	4
	5	#include <stdarg.h>
	6	#include <stdlib.h>
	7	#include <string.h>
	8	#include <stdio.h>
	9
	10	Sint16 stream[2][4096];
	11	int len=4096, done=0, need_refresh=0, bits=0, which=0;
	12	SDL_Surface *s=NULL;
	13	Uint32 flips=0;
	14	Uint32 black,white;
	15	float dy,dx;
	16
	17	/******************************************************************************/
	18	/* some simple exit and error routines */
	19
	20	void errorv(char *str, va_list ap)
	21	{
	22	vfprintf(stderr,str,ap);
	23	fprintf(stderr,": %s.\n", SDL_GetError());
	24	}
	25
	26	void cleanExit(char *str,...)
	27	{
	28	va_list ap;
	29	va_start(ap, str);
	30	errorv(str,ap);
	31	va_end(ap);
	32	Mix_CloseAudio();
	33	SDL_Quit();
	34	exit(1);
	35	}
	36
	37	/******************************************************************************/
	38	/* the postmix processor, only copies the stream buffer and indicates */
	39	/* a need for a screen refresh */
	40
	41	static void postmix(void udata, Uint8 _stream, int _len)
	42	{
	43	// save the stream buffer and indicate that we need a redraw
	44	len=_len;
	45	memcpy(stream[(which+1)%2],_stream,len>s->w4?s->w4:len);
	46	which=(which+1)%2;
	47	need_refresh=1;
	48	}
	49
	50	/******************************************************************************/
	51	/* redraw the wav and reset the need_refresh indicator */
	52
	53	void refresh()
	54	{
	55	int x,y,Y;
	56	Sint16 *buf;
	57
	58	buf=stream[which];
	59	need_refresh=0;
	60
	61	// clear the screen
	62	SDL_FillRect(s,NULL,black);
	63
	64	// draw the wav from the saved stream buffer
	65	Y=s->h/4;
	66	for(x=0;x<s->w*2;x++)
	67	{
	68	y=(buf[x]*dy);
	69	{
	70	if(y<0)
	71	{
	72	SDL_Rect r={x/2,Y+y,1,-y};
	73	SDL_FillRect(s,&r,white);
	74	}
	75	else
	76	{
	77	SDL_Rect r={x/2,Y,1,y};
	78	SDL_FillRect(s,&r,white);
	79	}
	80	}
	81	Y=Y>s->h/2?s->h/4:s->h*3/4;
	82	}
	83	SDL_Flip(s);
	84	flips++;
	85	}
	86
	87	/******************************************************************************/
	88
	89	int main(int argc, char **argv)
	90	{
	91	int audio_rate,audio_channels,
	92	// set this to any of 512,1024,2048,4096
	93	// the higher it is, the more FPS shown and CPU needed
	94	audio_buffers=512;
	95	Uint16 audio_format;
	96	Uint32 t;
	97	Mix_Music *music;
	98	int volume=SDL_MIX_MAXVOLUME;
	99
	100	// initialize SDL for audio and video
	101	if(SDL_Init(SDL_INIT_AUDIO\|SDL_INIT_VIDEO)<0)
	102	cleanExit("SDL_Init");
	103
	104	// open a screen for the wav output
	105	//if(!(s=SDL_SetVideoMode(1024,768,0,SDL_FULLSCREEN\|SDL_ANYFORMAT\|SDL_HWSURFACE\|SDL_DOUBLEBUF)))
	106	if(!(s=SDL_SetVideoMode(512,512,0,SDL_ANYFORMAT\|SDL_DOUBLEBUF)))
	107	cleanExit("SDL_SetVideoMode");
	108	SDL_WM_SetCaption("sdlwav - SDL_mixer demo","sdlwav");
	109
	110	// hide the annoying mouse pointer
	111	SDL_ShowCursor(SDL_DISABLE);
	112	// get the colors we use
	113	white=SDL_MapRGB(s->format,0xff,0xff,0xff);
	114	black=SDL_MapRGB(s->format,0,0,0);
	115
	116	// initialize sdl mixer, open up the audio device
	117	if(Mix_OpenAudio(44100,MIX_DEFAULT_FORMAT,2,audio_buffers)<0)
	118	cleanExit("Mix_OpenAudio");
	119
	120	// print out some info on the audio device and stream
	121	Mix_QuerySpec(&audio_rate, &audio_format, &audio_channels);
	122	bits=audio_format&0xFF;
	123	printf("Opened audio at %d Hz %d bit %s, %d bytes audio buffer\n", audio_rate,
	124	bits, audio_channels>1?"stereo":"mono", audio_buffers );
	125
	126	// calculate some parameters for the wav display
	127	dy=s->h/2.0/(float)(0x1<<bits);
	128	dx=s->w/(float)(0x1<<bits);
	129
	130	// load the song
	131	if(!(music=Mix_LoadMUS(argv[1])))
	132	cleanExit("Mix_LoadMUS(\"%s\")",argv[1]);
	133
	134	// set the post mix processor up
	135	Mix_SetPostMix(postmix,argv[1]);
	136
	137	// start playing and displaying the wav
	138	// wait for escape key of the quit event to finish
	139	t=SDL_GetTicks();
	140	if(Mix_PlayMusic(music, 1)==-1)
	141	cleanExit("Mix_PlayMusic(0x%p,1)",music);
	142	Mix_VolumeMusic(volume);
	143
	144	while((Mix_PlayingMusic() \|\| Mix_PausedMusic()) && !done)
	145	{
	146	SDL_Event e;
	147	while(SDL_PollEvent(&e))
	148	{
	149	switch(e.type)
	150	{
	151	case SDL_KEYDOWN:
	152	switch(e.key.keysym.sym)
	153	{
	154	case SDLK_ESCAPE:
	155	done=1;
	156	break;
	157	case SDLK_LEFT:
	158	Mix_RewindMusic();
	159	break;
	160	case SDLK_RIGHT:
	161	switch(Mix_GetMusicType(NULL))
	162	{
	163	case MUS_MP3:
	164	Mix_SetMusicPosition(+5);
	165	break;
	166	default:
	167	printf("cannot fast-forward this type of music\n");
	168	break;
	169	}
	170	break;
	171	case SDLK_UP:
	172	volume=(volume+1)<<1;
	173	if(volume>SDL_MIX_MAXVOLUME)
	174	volume=SDL_MIX_MAXVOLUME;
	175	Mix_VolumeMusic(volume);
	176	break;
	177	case SDLK_DOWN:
	178	volume>>=1;
	179	Mix_VolumeMusic(volume);
	180	break;
	181	case SDLK_SPACE:
	182	if(Mix_PausedMusic())
	183	Mix_ResumeMusic();
	184	else
	185	Mix_PauseMusic();
	186	break;
	187	default:
	188	break;
	189	}
	190	break;
	191	case SDL_QUIT:
	192	done=1;
	193	break;
	194	default:
	195	break;
	196	}
	197	}
	198	// the postmix processor tells us when there's new data to draw
	199	if(need_refresh)
	200	refresh();
	201	else
	202	SDL_Delay(0);
	203	}
	204	t=SDL_GetTicks()-t;
	205
	206	// free & close
	207	Mix_FreeMusic(music);
	208	Mix_CloseAudio();
	209	SDL_Quit();
	210	// show a silly statistic
	211	printf("fps=%.2f\n",((float)flips)/(t/1000.0));
	212	return(0);
	213	}

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