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overlay audio data on screen

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This commit is contained in:
Jeff Epler 2025-03-20 13:09:07 -05:00
parent 0be2290d4a
commit 4dea595da2
1 changed files with 12 additions and 0 deletions
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12
src/unix_main.c
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@ -403,6 +403,18 @@ int main(int argc, char *argv[])
umac_vsync_event();
copy_fb(framebuffer, ram_get_base() + umac_get_fb_offset());
uint16_t *audioptr = (uint16_t*)((uint8_t*)ram_base + umac_get_audio_offset());
for(int i=0; i<DISP_HEIGHT; i++) {
int d = *audioptr++ & 0xff;
for(int j=0; j<8; j++) {
if (d & (1 << j)) {
uint32_t fbdata = framebuffer[j + i * DISP_WIDTH];
fbdata = (fbdata & ~0xff) | ((d & (1 << j)) ? 0xff : 0);
framebuffer[j + i * DISP_WIDTH] = fbdata;
}
}
}
SDL_UpdateTexture(texture, NULL, framebuffer,
DISP_WIDTH * sizeof (Uint32));
/* Scales texture up to window size */