ysyx-workbench/am-kernels/kernels/bad-apple/bad-apple.c
tracer-ysyx d08c2860da > compile NEMU
ysyx_22040000 李心杨
Linux calcite 6.6.19 #1-NixOS SMP PREEMPT_DYNAMIC Fri Mar  1 12:35:11 UTC 2024 x86_64 GNU/Linux
 16:26:21  up 4 days  3:32,  2 users,  load average: 0.85, 0.91, 0.95
2024-03-24 16:26:21 +08:00

74 lines
1.9 KiB
C

#include <am.h>
#include <stdio.h>
#include <klib-macros.h>
#define FPS 30
#define CHAR_WHITE '.'
#define CHAR_BLACK 'X'
typedef struct {
uint8_t pixel[VIDEO_ROW * VIDEO_COL / 8];
} frame_t;
static void sleep_until(uint64_t next) {
while (io_read(AM_TIMER_UPTIME).us < next) ;
}
static uint8_t getbit(uint8_t *p, int idx) {
int byte_idx = idx / 8;
int bit_idx = idx % 8;
bit_idx = 7 - bit_idx;
uint8_t byte = p[byte_idx];
uint8_t bit = (byte >> bit_idx) & 1;
return bit;
}
int main() {
extern uint8_t video_payload, video_payload_end;
extern uint8_t audio_payload, audio_payload_end;
int audio_len = 0, audio_left = 0;
Area sbuf;
ioe_init();
frame_t *f = (void *)&video_payload;
frame_t *fend = (void *)&video_payload_end;
printf("\033[H\033[J"); // screan_clear
bool has_audio = io_read(AM_AUDIO_CONFIG).present;
if (has_audio) {
io_write(AM_AUDIO_CTRL, AUDIO_FREQ, AUDIO_CHANNEL, 1024);
audio_left = audio_len = &audio_payload_end - &audio_payload;
sbuf.start = &audio_payload;
}
uint64_t now = io_read(AM_TIMER_UPTIME).us;
for (; f < fend; f ++) {
printf("\033[0;0H"); // reset cursor
for (int y = 0; y < VIDEO_ROW; y++) {
for (int x = 0; x < VIDEO_COL; x++) {
uint8_t p = getbit(f->pixel, y * VIDEO_COL + x);
putch(p ? CHAR_BLACK : CHAR_WHITE);
}
putch('\n');
}
if (has_audio) {
int should_play = (AUDIO_FREQ / FPS) * sizeof(int16_t);
if (should_play > audio_left) should_play = audio_left;
while (should_play > 0) {
int len = (should_play > 4096 ? 4096 : should_play);
sbuf.end = sbuf.start + len;
io_write(AM_AUDIO_PLAY, sbuf);
sbuf.start += len;
should_play -= len;
}
audio_left -= should_play;
}
uint64_t next = now + (1000 * 1000 / FPS);
sleep_until(next);
now = next;
}
return 0;
}