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Improve progressive scan mode

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This commit is contained in:
esmane
2025-09-06 09:41:56 -04:00
committed by Jaromil
parent def52c449f
commit 69d23fc0a2
1 changed files with 13 additions and 3 deletions
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16
src/filter/ntsc/ntsc-effect.c
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@@ -154,11 +154,13 @@ void f0r_update(f0r_instance_t instance, double time, const uint32_t* inframe, u
// clear the output frame
memset(outframe, 0, inst->width * inst->height * sizeof(uint32_t));
inst->crt.blend = 0;
// set everything up for the simulation
inst->ntsc.data = (const char*)inframe;
inst->crt.out = (char*)outframe;
inst->ntsc.data = (const char*)inframe;
_render_field:
inst->ntsc.field = inst->field & 1;
if (inst->ntsc.field == 0) {
@@ -170,8 +172,16 @@ void f0r_update(f0r_instance_t instance, double time, const uint32_t* inframe, u
crt_modulate(&(inst->crt), &(inst->ntsc));
crt_demodulate(&(inst->crt), inst->noise);
if(!inst->progressive)
inst->field ^= 1;
// if we are in progressive mode, we render both fields onto the frame.
// in interlaced mode, we will hit the opposite field on the next frame.
if(inst->field && inst->progressive)
{
inst->field ^= 1;
// if we are not leaving scanlines blank, we will want to blend the frames in progressive mode
if(!inst->crt.scanlines)
{
inst->crt.blend = 1;
}
goto _render_field;
}
}