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initial audio hacking

This commit is contained in:
Nico 2021-11-17 15:09:54 +00:00
parent 2dab5491d4
commit ff847d5812
2 changed files with 70 additions and 4 deletions
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2
apps/plugins/varvara/SOURCES
View File

@ -4,4 +4,6 @@ devices/ppu.h
devices/ppu.c
devices/file.h
devices/file.c
devices/apu.h
devices/apu.c
varvara.c

72
apps/plugins/varvara/varvara.c
View File

@ -15,9 +15,13 @@ TODO audio device
TODO clean up
*/
#define POLYPHONY 4
#define AUDIO_BUF_SIZE 1024
#include "uxn.h"
#include "devices/ppu.h"
#include "devices/file.h"
#include "devices/apu.h"
#include "plugin.h"
#include "keymaps.h"
#include <stdio.h>
@ -26,11 +30,12 @@ TODO clean up
static Uxn u;
static Ppu ppu;
static Device *devctrl, *devsystem, *devconsole, *devscreen;
static Apu apu[POLYPHONY];
static Device *devctrl, *devsystem, *devconsole, *devscreen, *devaudio0;
unsigned int palette[3];
static Uint8 framebuffer[LCD_HEIGHT * LCD_WIDTH * 4];
static fb_data *lcd_fb = NULL;
int audio_buf[AUDIO_BUF_SIZE];
static unsigned long starttick;
static long sleeptime;
@ -208,6 +213,53 @@ datetime_dei(Device *d, Uint8 port)
}
}
void
apu_finished_handler(Apu *c)
{
DEBUGF("APU done\n");
}
void audio_callback(const void** start, size_t *size) {
int high = 32000;
int low = 0;
for (size_t i = 0; i < AUDIO_BUF_SIZE; i++) {
if (i & 1) {
audio_buf[i] = high;
} else {
audio_buf[i] = low;
}
}
*start = &audio_buf;
*size = AUDIO_BUF_SIZE;
}
static Uint8
audio_dei(Device *d, Uint8 port)
{
Apu *c = &apu[d - devaudio0];
switch(port) {
case 0x4: return apu_get_vu(c);
case 0x2: poke16(d->dat, 0x2, c->i); /* fall through */
default: return d->dat[port];
}
}
static void
audio_deo(Device *d, Uint8 port)
{
Apu *c = &apu[d - devaudio0];
if(port == 0xf) {
c->len = peek16(d->dat, 0xa);
c->addr = &d->mem[peek16(d->dat, 0xc)];
c->volume[0] = d->dat[0xe] >> 4;
c->volume[1] = d->dat[0xe] & 0xf;
c->repeat = !(d->dat[0xf] & 0x80);
apu_start(c, peek16(d->dat, 0x8), d->dat[0xf] & 0x7f);
}
}
// TODO mono and greyscale that don't suck
static void redraw(void)
{
@ -313,7 +365,19 @@ enum plugin_status plugin_start(const void* parameter)
rb->splash(HZ, "Please open a .rom file using this plugin!");
return PLUGIN_ERROR;
}
/* audio init */
#if INPUT_SRC_CAPS != 0
/* Select playback */
rb->audio_set_input_source(AUDIO_SRC_PLAYBACK, SRCF_PLAYBACK);
rb->audio_set_output_source(AUDIO_SRC_PLAYBACK);
#endif
rb->pcm_play_stop();
rb->mixer_set_frequency(44100);
rb->mixer_channel_play_data(PCM_MIXER_CHAN_PLAYBACK, audio_callback, NULL, 0);
/* uxn init */
DEBUGF("zeroing\n");
memzero8(&u, sizeof(Uxn));
@ -338,7 +402,7 @@ enum plugin_status plugin_start(const void* parameter)
/* system */ devsystem = uxn_port(&u, 0x0, system_dei, system_deo);
/* console */ devconsole = uxn_port(&u, 0x1, nil_dei, console_deo);
/* screen */ devscreen = uxn_port(&u, 0x2, screen_dei, screen_deo);
/* audio0 */ uxn_port(&u, 0x3, nil_dei, nil_deo);
/* audio0 */ devaudio0 = uxn_port(&u, 0x3, audio_dei, audio_deo);
/* audio1 */ uxn_port(&u, 0x4, nil_dei, nil_deo);
/* audio2 */ uxn_port(&u, 0x5, nil_dei, nil_deo);
/* audio3 */ uxn_port(&u, 0x6, nil_dei, nil_deo);