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Add overclocking - backported from FCEUX with mods

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This commit is contained in:
twinaphex
2016-02-22 18:36:09 +01:00
parent 479d5d8e37
commit 417b8c6022
8 changed files with 114 additions and 33 deletions
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91
src/drivers/libretro/libretro.c
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@@ -22,8 +22,8 @@
#include "../../unif.h"
#include "../../fds.h"
#include "../../vsuni.h"
#include "../../video.h"
#include <string.h>
#include "../../memstream.h"
#if defined(_3DS)
@@ -41,6 +41,15 @@ static bool use_raw_palette;
/* emulator-specific variables */
/* overclock the console by adding dummy scanlines to PPU loop
* disables DMC DMA and WaveHi filling for these dummies
* doesn't work with new PPU */
unsigned overclocked = 0;
/* 7-bit samples have priority over overclocking */
unsigned skip_7bit_overclocking = 1;
unsigned normal_scanlines = 240;
unsigned extrascanlines = 0;
int FCEUnetplay;
#ifdef PSP
#include "pspgu.h"
@@ -52,9 +61,6 @@ static uint16_t* fceu_video_out;
/* Some timing-related variables. */
static int maxconbskip = 9; /* Maximum consecutive blit skips. */
static int ffbskip = 9; /* Blit skips per blit when FF-ing */
static int soundo = 1;
static volatile int nofocus = 0;
@@ -467,8 +473,9 @@ void retro_set_controller_port_device(unsigned a, unsigned b)
void retro_set_environment(retro_environment_t cb)
{
static const struct retro_variable vars[] = {
{ "nes_palette", "Color Palette; asqrealc|loopy|quor|chris|matt|pasofami|crashman|mess|zaphod-cv|zaphod-smb|vs-drmar|vs-cv|vs-smb|nintendo-vc|raw" },
{ "nes_nospritelimit", "No Sprite Limit; disabled|enabled" },
{ "fceumm_palette", "Color Palette; asqrealc|loopy|quor|chris|matt|pasofami|crashman|mess|zaphod-cv|zaphod-smb|vs-drmar|vs-cv|vs-smb|nintendo-vc|raw" },
{ "fceumm_nospritelimit", "No Sprite Limit; disabled|enabled" },
{ "fceumm_overclocking", "Overclocking; disabled|2x" },
{ NULL, NULL },
};
@@ -608,57 +615,91 @@ static const keymap bindmap[] = {
static void check_variables(void)
{
static int overclock_state = -1;
struct retro_variable var = {0};
var.key = "nes_palette";
var.key = "fceumm_palette";
if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value)
{
unsigned orig_value = current_palette;
if (strcmp(var.value, "asqrealc") == 0)
if (!strcmp(var.value, "asqrealc"))
current_palette = 0;
else if (strcmp(var.value, "loopy") == 0)
else if (!strcmp(var.value, "loopy"))
current_palette = 1;
else if (strcmp(var.value, "quor") == 0)
else if (!strcmp(var.value, "quor"))
current_palette = 2;
else if (strcmp(var.value, "chris") == 0)
else if (!strcmp(var.value, "chris"))
current_palette = 3;
else if (strcmp(var.value, "matt") == 0)
else if (!strcmp(var.value, "matt"))
current_palette = 4;
else if (strcmp(var.value, "matt") == 0)
else if (!strcmp(var.value, "matt"))
current_palette = 5;
else if (strcmp(var.value, "pasofami") == 0)
else if (!strcmp(var.value, "pasofami"))
current_palette = 6;
else if (strcmp(var.value, "crashman") == 0)
else if (!strcmp(var.value, "crashman"))
current_palette = 7;
else if (strcmp(var.value, "mess") == 0)
else if (!strcmp(var.value, "mess"))
current_palette = 8;
else if (strcmp(var.value, "zaphod-cv") == 0)
else if (!strcmp(var.value, "zaphod-cv"))
current_palette = 9;
else if (strcmp(var.value, "zaphod-smb") == 0)
else if (!strcmp(var.value, "zaphod-smb"))
current_palette = 10;
else if (strcmp(var.value, "vs-drmar") == 0)
else if (!strcmp(var.value, "vs-drmar"))
current_palette = 11;
else if (strcmp(var.value, "vs-cv") == 0)
else if (!strcmp(var.value, "vs-cv"))
current_palette = 12;
else if (strcmp(var.value, "vs-smb") == 0)
else if (!strcmp(var.value, "vs-smb"))
current_palette = 13;
else if (strcmp(var.value, "nintendo-vc") == 0)
else if (!strcmp(var.value, "nintendo-vc"))
current_palette = 14;
else if (strcmp(var.value, "raw") == 0)
else if (!strcmp(var.value, "raw"))
current_palette = 15;
if (current_palette != orig_value)
retro_set_custom_palette();
}
var.key = "nes_nospritelimit";
var.key = "fceumm_nospritelimit";
if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value)
{
int no_sprite_limit = (strcmp(var.value, "enabled") == 0) ? 1 : 0;
int no_sprite_limit = (!strcmp(var.value, "enabled")) ? 1 : 0;
FCEUI_DisableSpriteLimitation(no_sprite_limit);
}
var.key = "fceumm_overclocking";
if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value)
{
bool do_reinit = false;
if (!strcmp(var.value, "disabled")
&& overclock_state != 0)
{
overclocked = 0;
skip_7bit_overclocking = 1;
extrascanlines = 0;
overclock_state = 0;
do_reinit = true;
}
else if (!strcmp(var.value, "2x")
&& overclock_state != 1)
{
overclocked = 1;
skip_7bit_overclocking = 1;
extrascanlines = 266;
overclock_state = 1;
do_reinit = true;
}
if (do_reinit)
{
FCEU_KillVirtualVideo();
FCEU_InitVirtualVideo();
}
}
}
/*