#include "testlib.h"

#include <AL/al.h>
#include <AL/alc.h>
#include <AL/alut.h>
#include <AL/alext.h>

#include <time.h>
#include <stdio.h>
#include <stdlib.h>
#include <sys/time.h>
#include <sys/types.h>
#include <unistd.h>


#include <math.h>

#ifndef M_PI
# define M_PI		3.14159265358979323846	/* pi */
#endif

#define WAVEFILE "sample.wav"

#define MIDDLEC 523.25
#define DEFFREQ 22050

/*            a c d e f g a b C D E F G A B            */
char *musicstr = "E 9";
char *dmusicstr = "E 2 D 2 C 2 D 2 E 2 E 2 E 2 D 2 D 2 D 2 E 2 G 2 G 3";

static void init(const char *fname);
static void cleanup(void);

static ALuint moving_source = 0;

static time_t start;
static void *cc; /* al context */

static void init(const char *fname) {
	ALfloat zeroes[] = { 0.0f, 0.0f,  0.0f };
	ALfloat back[]   = { 0.0f, 0.0f, -1.0f, 0.0f, 1.0f, 0.0f };
	ALfloat front[]  = { 0.0f, 0.0f,  1.0f, 0.0f, 1.0f, 0.0f };
	ALuint boom;
	ALboolean err;
	ALshort *data;
	int i;
	const int canon_max = ((1<<(16-1))-1);

	start = time(NULL);

	alListenerfv(AL_POSITION, zeroes );
	alListenerfv(AL_VELOCITY, zeroes );
	alListenerfv(AL_ORIENTATION, front );

	alGenBuffers( 1, &boom );

	data = malloc(DEFFREQ * sizeof *data);
	if(data == NULL) {
		exit(1);
	}

	/* populate data with a middle C */
	for(i = 0; i < DEFFREQ; i++) {
		data[i] = canon_max * sin(MIDDLEC * 2.0 * M_PI * i / DEFFREQ);
	}

	alBufferData( boom, AL_FORMAT_MONO16, data, DEFFREQ, DEFFREQ);
	free(data); /* openal makes a local copy of wave data */

	alGenSources( 1, &moving_source);

	alSourcef(  moving_source, AL_GAIN_LINEAR_LOKI,   0.20 );
	alSourcei(  moving_source, AL_BUFFER, boom );
	alSourcei(  moving_source, AL_LOOPING, AL_TRUE );

	return;
}

static void cleanup(void) {
	alcDestroyContext(cc);
#ifdef DMALLOC
	dmalloc_verify(0);
	dmalloc_log_unfreed();

#endif
#ifdef JLIB
	jv_check_mem();
#endif
}

int main( int argc, char* argv[] ) {
	ALCdevice *dev;
	time_t shouldend;
	int attrlist[] = { ALC_FREQUENCY, DEFFREQ,
			   ALC_INVALID };
	char *musicitr = musicstr;
	ALfloat pitch = 1.0;
	int beats;
	char note;
	
	dev = alcOpenDevice( NULL );
	if( dev == NULL ) {
		return 1;
	}

	cc = alcCreateContext( dev, attrlist);
	if(cc == NULL) {
		alcCloseDevice( dev );

		return 1;
	}

	alcMakeContextCurrent( cc );

	fixup_function_pointers();

	if(argc == 1) {
		init(WAVEFILE);
	} else {
		init(argv[1]);
	}

	while(*musicitr) {
		alSourceStop( moving_source );

		while(*musicitr == ' ') {
			musicitr++;
		}

		switch(*musicitr) {
			case 'c': pitch = 0.500010; break;
			case 'd': pitch = 0.561223; break;
			case 'e': pitch = 0.629967; break;
			case 'f': pitch = 0.667425; break;
			case 'g': pitch = 0.749164; break;
			case 'a': pitch = 0.840898; break;
			case 'b': pitch = 0.943870; break;
			case 'C': pitch = 1.0; break;
			case 'D': pitch = 1.122465; break;
			case 'E': pitch = 1.259933; break;
			case 'F': pitch = 1.339704; break;
			case 'G': pitch = 1.498309; break;
			case 'A': pitch = 1.681796; break;
			case 'B': pitch = 1.897754; break;
			default:
				fprintf(stderr, "unknown note %d\n", *musicitr); break;
		}

		note = *musicitr;
		musicitr++; /* skip note */

		while(*musicitr == ' ') {
			musicitr++;
		}

		beats = (int) *musicitr - '0';

		musicitr++;

		fprintf(stderr, "note %c beats %d\n", note, beats);

		alSourcef(moving_source, AL_PITCH, pitch);
		alSourcePlay( moving_source );
		micro_sleep(beats / 4.0 * 1000000);
	}

	cleanup();

	alcCloseDevice( dev );

	return 0;
}
