/***************************************************************************************
* Audio - Interrupt Service Routine
*
* This interrupt service routine records or plays back audio, depending on which type
* interrupt (read or write) is pending in the audio device.
****************************************************************************************/
void audio_ISR(alt_up_audio_dev* audio_dev, unsigned int id)
{
if (alt_up_audio_write_interrupt_pending(audio_dev)) // check for write interrupt
{
//int numToWrite = 0;
//int spaceAvailable = alt_up_audio_write_fifo_space(audio_dev, ALT_UP_AUDIO_LEFT);
int temp = 0, temp1 = 0;
if(soundMixer->indexSize <= 0) return;
temp = alt_up_audio_write_fifo(audio_dev, soundMixer->buffer[soundMixer->currIndex], 96, ALT_UP_AUDIO_LEFT);
temp1 = alt_up_audio_write_fifo(audio_dev, soundMixer->buffer[soundMixer->currIndex], 96, ALT_UP_AUDIO_RIGHT);
/*s->position += 96;
if(s->position>=s->length)
s->position = 0;*/
incIndex();
}
return;
}
void play_wav (unsigned int **arr)
{
alt_up_audio_reset_audio_core(audio);
unsigned int * input;
int k = 0;
input = arr[k];
while (1) {
if (alt_up_audio_write_interrupt_pending(audio) == 1)
{
alt_up_audio_write_fifo(audio, input, 100, ALT_UP_AUDIO_LEFT);
alt_up_audio_write_fifo(audio, input, 100, ALT_UP_AUDIO_RIGHT);
k++;
input = arr[k];
}
if (k >= 4377)
break;
}
}
//Audio interrupt function, plays sound effects and/or loops audio
//REQ: audmode->id must point to correct id
void audio_isr(audisr * audmode, alt_u32 irq_id) {
int i;
unsigned int ** temp;
unsigned int * second;
if (audmode->resetmix == true) {
audmode->resetmix = false;
audio_isr_2 = 0;
}
//if (audmode->mode == 0) {
if (audmode->id != audmode->oldid) {
audio_isr_k = 0;
seek = 0;
init_copy(audmode->id, audmode->oldid);
audmode->oldid = audmode->id;
}
if (audmode->id2 != audmode->oldid2) {
audio_isr_2 = 0;
audmode->oldid2 = audmode->id2;
}
if (audio_isr_k == 0) {
copy_bgm(audmode->id);
alt_up_rs232_write_data(uart, 0x6);
alt_up_rs232_write_data(uart, (int)audiosecs[audmode->id]);
}
audio_log.bgmin = copyarr[audio_isr_k];
//Mode 0, loop music
if (audmode->mode == 0) {
for (i = 0; i < 96; i++) {
audio_log.bgmin[i] = volume_adjust(audio_log.bgmin[i], audmode->newvolume);
}
}
else if (audmode->mode == 1) {
temp = arr[audmode->id2];
second = temp[audio_isr_2];
for (i = 0; i < 96; i++) {
unsigned int tempmix = audio_log.bgmin[i];
audio_log.bgmin[i] = mix_adjust(tempmix,second[i],5);
}
audio_isr_2++;
if (audio_isr_2 > audiosize[audmode->id2]) {
audio_isr_2 = 0;
audmode->mode = 0;
}
}
if (alt_up_audio_write_interrupt_pending(audio) == 1) {
alt_up_audio_write_fifo(audio, audio_log.bgmin, 96, ALT_UP_AUDIO_LEFT);
alt_up_audio_write_fifo(audio, audio_log.bgmin, 96, ALT_UP_AUDIO_RIGHT);
if (audmode->loop == true){
audio_isr_k = (audio_isr_k + 1) % audiosize[audmode->id];
seek = (seek + 1) % 333;
if (seek == 0) {
//alt_up_rs232_write_data(uart, 0x0A);
}
if (audio_isr_k == 0) {
alt_up_rs232_write_data(uart, 0x3);
}
}
else
{
if(audio_isr_k <= audiosize[audmode->id])
{
audio_isr_k += 1;
seek = (seek + 1) % 333;
if (seek == 0) {
//alt_up_rs232_write_data(uart, 0x0A);
}
}
else
{
seek = 0;
audmode->mode = 0;
audio_isr_2 = 0;
audio_isr_k = 0;
//alt_up_rs232_write_data(uart, 0x3);
alt_up_rs232_write_data(uart, 0x4);
wait();
if (audmode->shuffle == false) {
audmode->id += 1;
if ((audmode->id >= audmode->files) && (audmode->listloop == true)) {
audmode->id = 0;
//printf("Restarting songs\n");
}
else if((audmode->id >= audmode->files) && (audmode->listloop == false)) {
printf("End of Playlist\n");
audmode->id = 0;
alt_up_audio_disable_write_interrupt(audio);
}
}
else {
/*
do {
while(rs_flag == false);
alt_up_rs232_read_data(uart, &data, &parity);
}while((int)data == 0);
*/
wait();
alt_up_rs232_read_data(uart, &data, &parity);
int nextindex = (int)data;
nextindex -= 4;
//printf("Next Index: %d\n", nextindex);
if ((nextindex < 0) || (nextindex > audmode->files)) {
nextindex = 0;
printf("Error, next Index: %d\n", nextindex);
}
audmode->id = nextindex;
}
}
}
}
//}
/*
else if (audmode->mode == 1) {
if (audmode->id != audmode->oldid) {
//TEMP
audmode->id2 = audmode->id++;
if (audmode->id2 >= audmode->files) {
audmode->id2 = 0;
}
if (audiosize[audmode->id] > audiosize[audmode->id2]) {
audmode->large = audmode->id;
}
else {
audmode->large = audmode->id2;
}
//
audio_isr_k = 0;
init_copy(audmode->large, audmode->oldid);
audmode->oldid = audmode->id;
}
if (audio_isr_k == 0) {
copy_bgm(audmode->large);
alt_up_rs232_write_data(uart, 0x6);
}
audio_log.bgmin = copyarr[audio_isr_k];
for (i = 0; i < 96; i++) {
//audio_log.bgmin[i] = mix_adjust(audio_log.bgmin[i], ,audmode->newvolume);
}
if (alt_up_audio_write_interrupt_pending(audio) == 1) {
audio_isr_k = 0;
audmode->id += 1;
alt_up_rs232_write_data(uart, 0x3);
if ((audmode->id >= audmode->files) && (audmode->listloop == true)) {
audmode->id = 0;
printf("Restarting songs\n");
}
else if((audmode->id >= audmode->files) && (audmode->listloop == false)) {
printf("End of Playlist\n");
audmode->id = 0;
alt_up_audio_disable_write_interrupt(audio);
}
}
}
*/
}
