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picodrive/platform/libretro/libretro.c

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/*
* libretro core glue for PicoDrive
* (C) notaz, 2013
* (C) aliaspider, 2016
* (C) Daniel De Matteis, 2013
*
* This work is licensed under the terms of MAME license.
* See COPYING file in the top-level directory.
*/
#define _GNU_SOURCE 1 // mremap
#include <stdio.h>
#include <stdlib.h>
#include <stdarg.h>
#include <string.h>
#ifndef _WIN32
#ifndef NO_MMAP
#ifdef __SWITCH__
#include "../switch/mman.h"
#else
#include <sys/mman.h>
#endif
#endif
#else
#include <io.h>
#include <windows.h>
#include <sys/types.h>
#endif
#include <errno.h>
#ifdef __MACH__
#include <libkern/OSCacheControl.h>
#endif
#ifdef USE_LIBRETRO_VFS
#include "file_stream_transforms.h"
#endif
#if defined(RENDER_GSKIT_PS2)
#include "libretro-common/include/libretro_gskit_ps2.h"
#include "../ps2/asm.h"
#endif
#ifdef _3DS
#include "3ds/3ds_utils.h"
#define MEMOP_MAP 4
#define MEMOP_UNMAP 5
#define MEMOP_PROT 6
int svcDuplicateHandle(unsigned int* out, unsigned int original);
int svcCloseHandle(unsigned int handle);
int svcControlProcessMemory(unsigned int process, void* addr0, void* addr1,
unsigned int size, unsigned int type, unsigned int perm);
void* linearMemAlign(size_t size, size_t alignment);
void linearFree(void* mem);
static int ctr_svchack_successful = 0;
#elif defined(VITA)
#define TARGET_SIZE_2 24 // 2^24 = 16 megabytes
#include <psp2/kernel/sysmem.h>
static int sceBlock;
int getVMBlock();
int _newlib_vm_size_user = 1 << TARGET_SIZE_2;
#endif
#include "libretro_core_options.h"
#include <pico/pico_int.h>
#include <pico/state.h>
#include <pico/patch.h>
#include "../common/input_pico.h"
#include "../common/version.h"
#include <libretro.h>
static retro_log_printf_t log_cb;
static retro_video_refresh_t video_cb;
static retro_input_poll_t input_poll_cb;
static retro_input_state_t input_state_cb;
static retro_environment_t environ_cb;
static retro_audio_sample_batch_t audio_batch_cb;
#if defined(RENDER_GSKIT_PS2)
#define VOUT_MAX_WIDTH 328
#else
#define VOUT_MAX_WIDTH 320
#define VOUT_32BIT_WIDTH 256
#endif
#define VOUT_MAX_HEIGHT 240
#define INITIAL_SND_RATE 44100
static const float VOUT_PAR = 0.0;
static const float VOUT_4_3 = (224.0f * (4.0f / 3.0f));
static const float VOUT_CRT = (224.0f * 1.29911f);
static bool show_overscan = false;
static bool old_show_overscan = false;
/* Required to allow on the fly changes to 'show overscan' */
static int vm_current_start_line = -1;
static int vm_current_line_count = -1;
static int vm_current_is_32cols = -1;
static void *vout_buf;
static int vout_width, vout_height, vout_offset;
static float user_vout_width = 0.0;
#if defined(RENDER_GSKIT_PS2)
RETRO_HW_RENDER_INTEFACE_GSKIT_PS2 *ps2 = NULL;
static void *retro_palette;
static struct retro_hw_ps2_insets padding;
#endif
static short ALIGNED(4) sndBuffer[2*INITIAL_SND_RATE/50];
static void snd_write(int len);
char **g_argv;
#ifdef _WIN32
#define SLASH '\\'
#else
#define SLASH '/'
#endif
/* Frameskipping Support */
static unsigned frameskip_type = 0;
static unsigned frameskip_threshold = 0;
static uint16_t frameskip_counter = 0;
static bool retro_audio_buff_active = false;
static unsigned retro_audio_buff_occupancy = 0;
static bool retro_audio_buff_underrun = false;
/* Maximum number of consecutive frames that
* can be skipped */
#define FRAMESKIP_MAX 60
static unsigned audio_latency = 0;
static bool update_audio_latency = false;
static void retro_audio_buff_status_cb(
bool active, unsigned occupancy, bool underrun_likely)
{
retro_audio_buff_active = active;
retro_audio_buff_occupancy = occupancy;
retro_audio_buff_underrun = underrun_likely;
}
static void init_frameskip(void)
{
if (frameskip_type > 0)
{
struct retro_audio_buffer_status_callback buf_status_cb;
buf_status_cb.callback = retro_audio_buff_status_cb;
if (!environ_cb(RETRO_ENVIRONMENT_SET_AUDIO_BUFFER_STATUS_CALLBACK,
&buf_status_cb))
{
if (log_cb)
log_cb(RETRO_LOG_WARN, "Frameskip disabled - frontend does not support audio buffer status monitoring.\n");
retro_audio_buff_active = false;
retro_audio_buff_occupancy = 0;
retro_audio_buff_underrun = false;
audio_latency = 0;
}
else
{
/* Frameskip is enabled - increase frontend
* audio latency to minimise potential
* buffer underruns */
float frame_time_msec = 1000.0f / (Pico.m.pal ? 50.0f : 60.0f);
/* Set latency to 6x current frame time... */
audio_latency = (unsigned)((6.0f * frame_time_msec) + 0.5f);
/* ...then round up to nearest multiple of 32 */
audio_latency = (audio_latency + 0x1F) & ~0x1F;
}
}
else
{
environ_cb(RETRO_ENVIRONMENT_SET_AUDIO_BUFFER_STATUS_CALLBACK, NULL);
audio_latency = 0;
}
update_audio_latency = true;
}
/* functions called by the core */
void cache_flush_d_inval_i(void *start, void *end)
{
#ifdef __arm__
size_t len = (char *)end - (char *)start;
(void)len;
#if defined(__BLACKBERRY_QNX__)
msync(start, end - start, MS_SYNC | MS_CACHE_ONLY | MS_INVALIDATE_ICACHE);
#elif defined(__MACH__)
sys_dcache_flush(start, len);
sys_icache_invalidate(start, len);
#elif defined(_3DS)
ctr_flush_invalidate_cache();
#elif defined(VITA)
sceKernelSyncVMDomain(sceBlock, start, len);
#else
__clear_cache(start, end);
#endif
#endif
}
#ifdef _WIN32
/* mmap() replacement for Windows
*
* Author: Mike Frysinger <vapier@gentoo.org>
* Placed into the public domain
*/
/* References:
* CreateFileMapping: http://msdn.microsoft.com/en-us/library/aa366537(VS.85).aspx
* CloseHandle: http://msdn.microsoft.com/en-us/library/ms724211(VS.85).aspx
* MapViewOfFile: http://msdn.microsoft.com/en-us/library/aa366761(VS.85).aspx
* UnmapViewOfFile: http://msdn.microsoft.com/en-us/library/aa366882(VS.85).aspx
*/
#define PROT_READ 0x1
#define PROT_WRITE 0x2
/* This flag is only available in WinXP+ */
#ifdef FILE_MAP_EXECUTE
#define PROT_EXEC 0x4
#else
#define PROT_EXEC 0x0
#define FILE_MAP_EXECUTE 0
#endif
#define MAP_SHARED 0x01
#define MAP_PRIVATE 0x02
#define MAP_ANONYMOUS 0x20
#define MAP_ANON MAP_ANONYMOUS
#define MAP_FAILED ((void *) -1)
#ifdef __USE_FILE_OFFSET64
# define DWORD_HI(x) (x >> 32)
# define DWORD_LO(x) ((x) & 0xffffffff)
#else
# define DWORD_HI(x) (0)
# define DWORD_LO(x) (x)
#endif
static void *mmap(void *start, size_t length, int prot, int flags, int fd, off_t offset)
{
uint32_t flProtect, dwDesiredAccess;
off_t end;
HANDLE mmap_fd, h;
void *ret;
if (prot & ~(PROT_READ | PROT_WRITE | PROT_EXEC))
return MAP_FAILED;
if (fd == -1) {
if (!(flags & MAP_ANON) || offset)
return MAP_FAILED;
} else if (flags & MAP_ANON)
return MAP_FAILED;
if (prot & PROT_WRITE) {
if (prot & PROT_EXEC)
flProtect = PAGE_EXECUTE_READWRITE;
else
flProtect = PAGE_READWRITE;
} else if (prot & PROT_EXEC) {
if (prot & PROT_READ)
flProtect = PAGE_EXECUTE_READ;
else if (prot & PROT_EXEC)
flProtect = PAGE_EXECUTE;
} else
flProtect = PAGE_READONLY;
end = length + offset;
if (fd == -1)
mmap_fd = INVALID_HANDLE_VALUE;
else
mmap_fd = (HANDLE)_get_osfhandle(fd);
h = CreateFileMapping(mmap_fd, NULL, flProtect, DWORD_HI(end), DWORD_LO(end), NULL);
if (h == NULL)
return MAP_FAILED;
if (prot & PROT_WRITE)
dwDesiredAccess = FILE_MAP_WRITE;
else
dwDesiredAccess = FILE_MAP_READ;
if (prot & PROT_EXEC)
dwDesiredAccess |= FILE_MAP_EXECUTE;
if (flags & MAP_PRIVATE)
dwDesiredAccess |= FILE_MAP_COPY;
ret = MapViewOfFile(h, dwDesiredAccess, DWORD_HI(offset), DWORD_LO(offset), length);
if (ret == NULL) {
CloseHandle(h);
ret = MAP_FAILED;
}
return ret;
}
static void munmap(void *addr, size_t length)
{
UnmapViewOfFile(addr);
/* ruh-ro, we leaked handle from CreateFileMapping() ... */
}
#elif defined(NO_MMAP)
#define PROT_EXEC 0x04
#define MAP_FAILED 0
#define PROT_READ 0
#define PROT_WRITE 0
#define MAP_PRIVATE 0
#define MAP_ANONYMOUS 0
void* mmap(void *desired_addr, size_t len, int mmap_prot, int mmap_flags, int fildes, size_t off)
{
return malloc(len);
}
void munmap(void *base_addr, size_t len)
{
free(base_addr);
}
int mprotect(void *addr, size_t len, int prot)
{
/* stub - not really needed at this point since this codepath has no dynarecs */
return 0;
}
#endif
#ifndef MAP_ANONYMOUS
#define MAP_ANONYMOUS MAP_ANON
#endif
#ifdef _3DS
typedef struct
{
unsigned int requested_map;
void* buffer;
}pico_mmap_t;
pico_mmap_t pico_mmaps[] = {
{0x02000000, 0},
{0x06000000, 0},
{NULL, 0}
};
void *plat_mmap(unsigned long addr, size_t size, int need_exec, int is_fixed)
{
(void)is_fixed;
if (ctr_svchack_successful)
{
pico_mmap_t* pico_mmap;
for (pico_mmap = pico_mmaps; pico_mmap->requested_map; pico_mmap++)
{
if ((pico_mmap->requested_map == addr))
{
unsigned int ptr_aligned, tmp;
unsigned int currentHandle;
unsigned int perm = 0b011;
if (need_exec)
perm = 0b111;
size = (size + 0xFFF) & ~0xFFF;
pico_mmap->buffer = malloc(size + 0x1000);
ptr_aligned = (((unsigned int)pico_mmap->buffer) + 0xFFF) & ~0xFFF;
svcDuplicateHandle(&currentHandle, 0xFFFF8001);
if(svcControlProcessMemory(currentHandle, pico_mmap->requested_map, ptr_aligned, size, MEMOP_MAP, perm) < 0)
{
if (log_cb)
log_cb(RETRO_LOG_ERROR, "could not map memory @0x%08X\n", pico_mmap->requested_map);
exit(1);
}
svcCloseHandle(currentHandle);
return (void*)pico_mmap->requested_map;
}
}
}
return malloc(size);
}
void *plat_mremap(void *ptr, size_t oldsize, size_t newsize)
{
if (ctr_svchack_successful)
{
pico_mmap_t* pico_mmap;
for (pico_mmap = pico_mmaps; pico_mmap->requested_map; pico_mmap++)
{
if ((pico_mmap->requested_map == (unsigned int)ptr))
{
unsigned int ptr_aligned;
unsigned int currentHandle;
void* tmp;
oldsize = (oldsize + 0xFFF) & ~0xFFF;
newsize = (newsize + 0xFFF) & ~0xFFF;
ptr_aligned = (((unsigned int)pico_mmap->buffer) + 0xFFF) & ~0xFFF;
svcDuplicateHandle(&currentHandle, 0xFFFF8001);
svcControlProcessMemory(currentHandle, pico_mmap->requested_map, ptr_aligned, oldsize, MEMOP_UNMAP, 0b011);
tmp = realloc(pico_mmap->buffer, newsize + 0x1000);
if(!tmp)
return NULL;
pico_mmap->buffer = tmp;
ptr_aligned = (((unsigned int)pico_mmap->buffer) + 0xFFF) & ~0xFFF;
svcControlProcessMemory(currentHandle, pico_mmap->requested_map, ptr_aligned, newsize, MEMOP_MAP, 0x3);
svcCloseHandle(currentHandle);
return ptr;
}
}
}
return realloc(ptr, newsize);
}
void plat_munmap(void *ptr, size_t size)
{
if (ctr_svchack_successful)
{
pico_mmap_t* pico_mmap;
for (pico_mmap = pico_mmaps; pico_mmap->requested_map; pico_mmap++)
{
if ((pico_mmap->requested_map == (unsigned int)ptr))
{
unsigned int ptr_aligned;
unsigned int currentHandle;
size = (size + 0xFFF) & ~0xFFF;
ptr_aligned = (((unsigned int)pico_mmap->buffer) + 0xFFF) & ~0xFFF;
svcDuplicateHandle(&currentHandle, 0xFFFF8001);
svcControlProcessMemory(currentHandle, (void*)pico_mmap->requested_map, (void*)ptr_aligned, size, MEMOP_UNMAP, 0b011);
svcCloseHandle(currentHandle);
free(pico_mmap->buffer);
pico_mmap->buffer = NULL;
return;
}
}
}
free(ptr);
}
#else
void *plat_mmap(unsigned long addr, size_t size, int need_exec, int is_fixed)
{
int flags = MAP_PRIVATE | MAP_ANONYMOUS;
void *req, *ret;
req = (void *)(uintptr_t)addr;
ret = mmap(req, size, PROT_READ | PROT_WRITE, flags, -1, 0);
if (ret == MAP_FAILED) {
if (log_cb)
log_cb(RETRO_LOG_ERROR, "mmap(%08lx, %zd) failed: %d\n", addr, size, errno);
return NULL;
}
if (addr != 0 && ret != (void *)(uintptr_t)addr) {
if (log_cb)
log_cb(RETRO_LOG_WARN, "warning: wanted to map @%08lx, got %p\n",
addr, ret);
if (is_fixed) {
munmap(ret, size);
return NULL;
}
}
return ret;
}
void *plat_mremap(void *ptr, size_t oldsize, size_t newsize)
{
#if defined(__linux__) && !defined(__SWITCH__)
void *ret = mremap(ptr, oldsize, newsize, 0);
if (ret == MAP_FAILED)
return NULL;
return ret;
#else
void *tmp, *ret;
size_t preserve_size;
preserve_size = oldsize;
if (preserve_size > newsize)
preserve_size = newsize;
tmp = malloc(preserve_size);
if (tmp == NULL)
return NULL;
memcpy(tmp, ptr, preserve_size);
munmap(ptr, oldsize);
ret = mmap(ptr, newsize, PROT_READ | PROT_WRITE,
MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
if (ret == MAP_FAILED) {
free(tmp);
return NULL;
}
memcpy(ret, tmp, preserve_size);
free(tmp);
return ret;
#endif
}
void plat_munmap(void *ptr, size_t size)
{
if (ptr != NULL)
munmap(ptr, size);
}
#endif
// if NULL is returned, static buffer is used
void *plat_mem_get_for_drc(size_t size)
{
void *mem = NULL;
#ifdef VITA
sceKernelGetMemBlockBase(sceBlock, &mem);
#endif
return mem;
}
int plat_mem_set_exec(void *ptr, size_t size)
{
int ret = -1;
#ifdef _WIN32
DWORD oldProtect = 0;
ret = VirtualProtect(ptr, size, PAGE_EXECUTE_READWRITE, &oldProtect);
if (ret == 0 && log_cb)
log_cb(RETRO_LOG_ERROR, "VirtualProtect(%p, %d) failed: %d\n", ptr, (int)size,
GetLastError());
#elif defined(_3DS)
if (ctr_svchack_successful)
{
unsigned int currentHandle;
svcDuplicateHandle(&currentHandle, 0xFFFF8001);
ret = svcControlProcessMemory(currentHandle, ptr, 0x0,
size, MEMOP_PROT, 0b111);
svcCloseHandle(currentHandle);
ctr_flush_invalidate_cache();
}
else
{
if (log_cb)
log_cb(RETRO_LOG_ERROR, "plat_mem_set_exec called with no svcControlProcessMemory access\n");
exit(1);
}
#elif defined(VITA)
ret = sceKernelOpenVMDomain();
#else
ret = mprotect(ptr, size, PROT_READ | PROT_WRITE | PROT_EXEC);
if (ret != 0 && log_cb)
log_cb(RETRO_LOG_ERROR, "mprotect(%p, %zd) failed: %d\n", ptr, size, errno);
#endif
return ret;
}
void emu_video_mode_change(int start_line, int line_count, int is_32cols)
{
struct retro_system_av_info av_info;
vm_current_start_line = start_line;
vm_current_line_count = line_count;
vm_current_is_32cols = is_32cols;
#if defined(RENDER_GSKIT_PS2)
if (is_32cols) {
padding = (struct retro_hw_ps2_insets){start_line, 16.0f, VOUT_MAX_HEIGHT - line_count - start_line, 64.0f};
} else {
padding = (struct retro_hw_ps2_insets){start_line, 16.0f, VOUT_MAX_HEIGHT - line_count - start_line, 0.0f};
}
vout_width = VOUT_MAX_WIDTH;
vout_height = VOUT_MAX_HEIGHT;
memset(vout_buf, 0, vout_width * VOUT_MAX_HEIGHT);
memset(retro_palette, 0, gsKit_texture_size_ee(16, 16, GS_PSM_CT16));
PicoDrawSetOutBuf(vout_buf, vout_width);
#else
vout_width = is_32cols ? VOUT_32BIT_WIDTH : VOUT_MAX_WIDTH;
memset(vout_buf, 0, VOUT_MAX_WIDTH * VOUT_MAX_HEIGHT * 2);
PicoDrawSetOutBuf(vout_buf, vout_width * 2);
if (show_overscan)
{
vout_height = line_count + (start_line * 2);
vout_offset = 0;
}
else
{
vout_height = line_count;
/* Note: We multiply by 2 here to account for pitch */
vout_offset = vout_width * start_line * 2;
}
/* Redundant sanity check... */
vout_height = (vout_height > VOUT_MAX_HEIGHT) ?
VOUT_MAX_HEIGHT : vout_height;
vout_offset = (vout_offset > vout_width * (VOUT_MAX_HEIGHT - 1) * 2) ?
vout_width * (VOUT_MAX_HEIGHT - 1) * 2 : vout_offset;
#endif
// Update the geometry
retro_get_system_av_info(&av_info);
environ_cb(RETRO_ENVIRONMENT_SET_GEOMETRY, &av_info);
}
void emu_32x_startup(void)
{
PicoDrawSetOutFormat(PDF_RGB555, 0);
PicoDrawSetOutBuf(vout_buf, vout_width * 2);
}
void lprintf(const char *fmt, ...)
{
char buffer[256];
va_list ap;
va_start(ap, fmt);
vsprintf(buffer, fmt, ap);
/* TODO - add 'level' param for warning/error messages? */
if (log_cb)
log_cb(RETRO_LOG_INFO, "%s", buffer);
va_end(ap);
}
/* libretro */
void retro_set_environment(retro_environment_t cb)
{
#ifdef USE_LIBRETRO_VFS
struct retro_vfs_interface_info vfs_iface_info;
#endif
environ_cb = cb;
libretro_set_core_options(environ_cb);
#ifdef USE_LIBRETRO_VFS
vfs_iface_info.required_interface_version = 1;
vfs_iface_info.iface = NULL;
if (environ_cb(RETRO_ENVIRONMENT_GET_VFS_INTERFACE, &vfs_iface_info))
filestream_vfs_init(&vfs_iface_info);
#endif
}
void retro_set_video_refresh(retro_video_refresh_t cb) { video_cb = cb; }
void retro_set_audio_sample(retro_audio_sample_t cb) { (void)cb; }
void retro_set_audio_sample_batch(retro_audio_sample_batch_t cb) { audio_batch_cb = cb; }
void retro_set_input_poll(retro_input_poll_t cb) { input_poll_cb = cb; }
void retro_set_input_state(retro_input_state_t cb) { input_state_cb = cb; }
unsigned retro_api_version(void)
{
return RETRO_API_VERSION;
}
void retro_set_controller_port_device(unsigned port, unsigned device)
{
}
void retro_get_system_info(struct retro_system_info *info)
{
memset(info, 0, sizeof(*info));
info->library_name = "PicoDrive";
#ifndef GIT_VERSION
#define GIT_VERSION ""
#endif
info->library_version = VERSION GIT_VERSION;
info->valid_extensions = "bin|gen|smd|md|32x|cue|iso|sms";
info->need_fullpath = true;
}
void retro_get_system_av_info(struct retro_system_av_info *info)
{
float common_width;
memset(info, 0, sizeof(*info));
info->timing.fps = Pico.m.pal ? 50 : 60;
info->timing.sample_rate = PicoIn.sndRate;
info->geometry.base_width = vout_width;
info->geometry.base_height = vout_height;
info->geometry.max_width = vout_width;
info->geometry.max_height = vout_height;
common_width = vout_width;
if (user_vout_width != 0)
common_width = user_vout_width;
info->geometry.aspect_ratio = common_width / vout_height;
}
/* savestates */
struct savestate_state {
const char *load_buf;
char *save_buf;
size_t size;
size_t pos;
};
size_t state_read(void *p, size_t size, size_t nmemb, void *file)
{
struct savestate_state *state = file;
size_t bsize = size * nmemb;
if (state->pos + bsize > state->size) {
if (log_cb)
log_cb(RETRO_LOG_ERROR, "savestate error: %u/%u\n",
state->pos + bsize, state->size);
bsize = state->size - state->pos;
if ((int)bsize <= 0)
return 0;
}
memcpy(p, state->load_buf + state->pos, bsize);
state->pos += bsize;
return bsize;
}
size_t state_write(void *p, size_t size, size_t nmemb, void *file)
{
struct savestate_state *state = file;
size_t bsize = size * nmemb;
if (state->pos + bsize > state->size) {
if (log_cb)
log_cb(RETRO_LOG_ERROR, "savestate error: %u/%u\n",
state->pos + bsize, state->size);
bsize = state->size - state->pos;
if ((int)bsize <= 0)
return 0;
}
memcpy(state->save_buf + state->pos, p, bsize);
state->pos += bsize;
return bsize;
}
size_t state_skip(void *p, size_t size, size_t nmemb, void *file)
{
struct savestate_state *state = file;
size_t bsize = size * nmemb;
state->pos += bsize;
return bsize;
}
size_t state_eof(void *file)
{
struct savestate_state *state = file;
return state->pos >= state->size;
}
int state_fseek(void *file, long offset, int whence)
{
struct savestate_state *state = file;
switch (whence) {
case SEEK_SET:
state->pos = offset;
break;
case SEEK_CUR:
state->pos += offset;
break;
case SEEK_END:
state->pos = state->size + offset;
break;
}
return (int)state->pos;
}
/* savestate sizes vary wildly depending if cd/32x or
* carthw is active, so run the whole thing to get size */
size_t retro_serialize_size(void)
{
struct savestate_state state = { 0, };
int ret;
ret = PicoStateFP(&state, 1, NULL, state_skip, NULL, state_fseek);
if (ret != 0)
return 0;
return state.pos;
}
bool retro_serialize(void *data, size_t size)
{
struct savestate_state state = { 0, };
int ret;
state.save_buf = data;
state.size = size;
state.pos = 0;
ret = PicoStateFP(&state, 1, NULL, state_write,
NULL, state_fseek);
return ret == 0;
}
bool retro_unserialize(const void *data, size_t size)
{
struct savestate_state state = { 0, };
int ret;
state.load_buf = data;
state.size = size;
state.pos = 0;
ret = PicoStateFP(&state, 0, state_read, NULL,
state_eof, state_fseek);
return ret == 0;
}
typedef struct patch
{
unsigned int addr;
unsigned short data;
unsigned char comp;
} patch;
extern void decode(char *buff, patch *dest);
extern uint16_t m68k_read16(uint32_t a);
extern void m68k_write16(uint32_t a, uint16_t d);
void retro_cheat_reset(void)
{
int i=0;
unsigned int addr;
for (i = 0; i < PicoPatchCount; i++)
{
addr = PicoPatches[i].addr;
if (addr < Pico.romsize) {
if (PicoPatches[i].active)
*(unsigned short *)(Pico.rom + addr) = PicoPatches[i].data_old;
} else {
if (PicoPatches[i].active)
m68k_write16(PicoPatches[i].addr,PicoPatches[i].data_old);
}
}
PicoPatchUnload();
}
void retro_cheat_set(unsigned index, bool enabled, const char *code)
{
patch pt;
int array_len = PicoPatchCount;
char codeCopy[256];
char *buff;
if (*code == '\0')
return;
strcpy(codeCopy, code);
buff = strtok(codeCopy,"+");
while (buff != NULL)
{
decode(buff, &pt);
if (pt.addr == (uint32_t) -1 || pt.data == (uint16_t) -1)
{
log_cb(RETRO_LOG_ERROR,"CHEATS: Invalid code: %s\n",buff);
return;
}
/* code was good, add it */
if (array_len < PicoPatchCount + 1)
{
void *ptr;
array_len *= 2;
array_len++;
ptr = realloc(PicoPatches, array_len * sizeof(PicoPatches[0]));
if (ptr == NULL) {
log_cb(RETRO_LOG_ERROR,"CHEATS: Failed to allocate memory for: %s\n",buff);
return;
}
PicoPatches = ptr;
}
strcpy(PicoPatches[PicoPatchCount].code, buff);
PicoPatches[PicoPatchCount].active = enabled;
PicoPatches[PicoPatchCount].addr = pt.addr;
PicoPatches[PicoPatchCount].data = pt.data;
PicoPatches[PicoPatchCount].comp = pt.comp;
if (PicoPatches[PicoPatchCount].addr < Pico.romsize)
PicoPatches[PicoPatchCount].data_old = *(uint16_t *)(Pico.rom + PicoPatches[PicoPatchCount].addr);
else
PicoPatches[PicoPatchCount].data_old = (uint16_t) m68k_read16(PicoPatches[PicoPatchCount].addr);
PicoPatchCount++;
buff = strtok(NULL,"+");
}
}
/* multidisk support */
static bool disk_ejected;
static unsigned int disk_current_index;
static unsigned int disk_count;
static struct disks_state {
char *fname;
} disks[8];
static bool disk_set_eject_state(bool ejected)
{
// TODO?
disk_ejected = ejected;
return true;
}
static bool disk_get_eject_state(void)
{
return disk_ejected;
}
static unsigned int disk_get_image_index(void)
{
return disk_current_index;
}
static bool disk_set_image_index(unsigned int index)
{
enum cd_img_type cd_type;
int ret;
if (index >= sizeof(disks) / sizeof(disks[0]))
return false;
if (disks[index].fname == NULL) {
if (log_cb)
log_cb(RETRO_LOG_ERROR, "missing disk #%u\n", index);
// RetroArch specifies "no disk" with index == count,
// so don't fail here..
disk_current_index = index;
return true;
}
if (log_cb)
log_cb(RETRO_LOG_INFO, "switching to disk %u: \"%s\"\n", index,
disks[index].fname);
ret = -1;
cd_type = PicoCdCheck(disks[index].fname, NULL);
if (cd_type != CIT_NOT_CD)
ret = cdd_load(disks[index].fname, cd_type);
if (ret != 0) {
if (log_cb)
log_cb(RETRO_LOG_ERROR, "Load failed, invalid CD image?\n");
return 0;
}
disk_current_index = index;
return true;
}
static unsigned int disk_get_num_images(void)
{
return disk_count;
}
static bool disk_replace_image_index(unsigned index,
const struct retro_game_info *info)
{
bool ret = true;
if (index >= sizeof(disks) / sizeof(disks[0]))
return false;
if (disks[index].fname != NULL)
free(disks[index].fname);
disks[index].fname = NULL;
if (info != NULL) {
disks[index].fname = strdup(info->path);
if (index == disk_current_index)
ret = disk_set_image_index(index);
}
return ret;
}
static bool disk_add_image_index(void)
{
if (disk_count >= sizeof(disks) / sizeof(disks[0]))
return false;
disk_count++;
return true;
}
static struct retro_disk_control_callback disk_control = {
disk_set_eject_state,
disk_get_eject_state,
disk_get_image_index,
disk_set_image_index,
disk_get_num_images,
disk_replace_image_index,
disk_add_image_index,
};
static void disk_tray_open(void)
{
if (log_cb)
log_cb(RETRO_LOG_INFO, "cd tray open\n");
disk_ejected = 1;
}
static void disk_tray_close(void)
{
if (log_cb)
log_cb(RETRO_LOG_INFO, "cd tray close\n");
disk_ejected = 0;
}
static const char * const biosfiles_us[] = {
"us_scd2_9306", "SegaCDBIOS9303", "us_scd1_9210", "bios_CD_U"
};
static const char * const biosfiles_eu[] = {
"eu_mcd2_9306", "eu_mcd2_9303", "eu_mcd1_9210", "bios_CD_E"
};
static const char * const biosfiles_jp[] = {
"jp_mcd2_921222", "jp_mcd1_9112", "jp_mcd1_9111", "bios_CD_J"
};
static void make_system_path(char *buf, size_t buf_size,
const char *name, const char *ext)
{
const char *dir = NULL;
if (environ_cb(RETRO_ENVIRONMENT_GET_SYSTEM_DIRECTORY, &dir) && dir) {
snprintf(buf, buf_size, "%s%c%s%s", dir, SLASH, name, ext);
}
else {
snprintf(buf, buf_size, "%s%s", name, ext);
}
}
static const char *find_bios(int *region, const char *cd_fname)
{
const char * const *files;
static char path[256];
int i, count;
FILE *f = NULL;
if (*region == 4) { // US
files = biosfiles_us;
count = sizeof(biosfiles_us) / sizeof(char *);
} else if (*region == 8) { // EU
files = biosfiles_eu;
count = sizeof(biosfiles_eu) / sizeof(char *);
} else if (*region == 1 || *region == 2) {
files = biosfiles_jp;
count = sizeof(biosfiles_jp) / sizeof(char *);
} else {
return NULL;
}
for (i = 0; i < count; i++)
{
make_system_path(path, sizeof(path), files[i], ".bin");
f = fopen(path, "rb");
if (f != NULL)
break;
make_system_path(path, sizeof(path), files[i], ".zip");
f = fopen(path, "rb");
if (f != NULL)
break;
}
if (f != NULL) {
if (log_cb)
log_cb(RETRO_LOG_INFO, "using bios: %s\n", path);
fclose(f);
return path;
}
return NULL;
}
static void set_memory_maps(void)
{
if (PicoIn.AHW & PAHW_MCD)
{
const size_t SCD_BIT = 1ULL << 31ULL;
const uint64_t mem = RETRO_MEMDESC_SYSTEM_RAM;
struct retro_memory_map mmaps;
struct retro_memory_descriptor descs[] = {
{ mem, PicoMem.ram, 0, 0xFF0000, 0, 0, 0x10000, "68KRAM" },
/* virtual address using SCD_BIT so all 512M of prg_ram can be accessed */
/* at address $80020000 */
{ mem, Pico_mcd->prg_ram, 0, SCD_BIT | 0x020000, 0, 0, 0x80000, "PRGRAM" },
};
mmaps.descriptors = descs;
mmaps.num_descriptors = sizeof(descs) / sizeof(descs[0]);
environ_cb(RETRO_ENVIRONMENT_SET_MEMORY_MAPS, &mmaps);
}
}
bool retro_load_game(const struct retro_game_info *info)
{
enum media_type_e media_type;
static char carthw_path[256];
size_t i;
struct retro_input_descriptor desc[] = {
{ 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_LEFT, "D-Pad Left" },
{ 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_UP, "D-Pad Up" },
{ 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_DOWN, "D-Pad Down" },
{ 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_RIGHT, "D-Pad Right" },
{ 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_B, "B" },
{ 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_A, "C" },
{ 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_X, "Y" },
{ 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_Y, "A" },
{ 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_L, "X" },
{ 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_R, "Z" },
{ 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_SELECT,"Mode" },
{ 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_START, "Start" },
{ 1, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_LEFT, "D-Pad Left" },
{ 1, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_UP, "D-Pad Up" },
{ 1, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_DOWN, "D-Pad Down" },
{ 1, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_RIGHT, "D-Pad Right" },
{ 1, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_B, "B" },
{ 1, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_A, "C" },
{ 1, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_X, "Y" },
{ 1, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_Y, "A" },
{ 1, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_L, "X" },
{ 1, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_R, "Z" },
{ 1, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_SELECT,"Mode" },
{ 1, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_START, "Start" },
{ 0 },
};
struct retro_input_descriptor desc_sms[] = {
{ 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_LEFT, "D-Pad Left" },
{ 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_UP, "D-Pad Up" },
{ 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_DOWN, "D-Pad Down" },
{ 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_RIGHT, "D-Pad Right" },
{ 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_B, "Button 1 Start" },
{ 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_A, "Button 2" },
{ 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_START, "Button Pause" },
{ 1, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_LEFT, "D-Pad Left" },
{ 1, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_UP, "D-Pad Up" },
{ 1, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_DOWN, "D-Pad Down" },
{ 1, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_RIGHT, "D-Pad Right" },
{ 1, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_B, "Button 1 Start" },
{ 1, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_A, "Button 2" },
{ 1, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_START, "Button Pause" },
{ 0 },
};
enum retro_pixel_format fmt = RETRO_PIXEL_FORMAT_RGB565;
if (!environ_cb(RETRO_ENVIRONMENT_SET_PIXEL_FORMAT, &fmt)) {
if (log_cb)
log_cb(RETRO_LOG_ERROR, "RGB565 support required, sorry\n");
return false;
}
if (info == NULL || info->path == NULL) {
if (log_cb)
log_cb(RETRO_LOG_ERROR, "info->path required\n");
return false;
}
for (i = 0; i < sizeof(disks) / sizeof(disks[0]); i++) {
if (disks[i].fname != NULL) {
free(disks[i].fname);
disks[i].fname = NULL;
}
}
disk_current_index = 0;
disk_count = 1;
disks[0].fname = strdup(info->path);
make_system_path(carthw_path, sizeof(carthw_path), "carthw", ".cfg");
media_type = PicoLoadMedia(info->path, carthw_path,
find_bios, NULL);
switch (media_type) {
case PM_BAD_DETECT:
if (log_cb)
log_cb(RETRO_LOG_ERROR, "Failed to detect ROM/CD image type.\n");
return false;
case PM_BAD_CD:
if (log_cb)
log_cb(RETRO_LOG_ERROR, "Invalid CD image\n");
return false;
case PM_BAD_CD_NO_BIOS:
if (log_cb)
log_cb(RETRO_LOG_ERROR, "Missing BIOS\n");
return false;
case PM_ERROR:
if (log_cb)
log_cb(RETRO_LOG_ERROR, "Load error\n");
return false;
default:
break;
}
if (media_type == PM_MARK3)
environ_cb(RETRO_ENVIRONMENT_SET_INPUT_DESCRIPTORS, desc_sms);
else
environ_cb(RETRO_ENVIRONMENT_SET_INPUT_DESCRIPTORS, desc);
PicoLoopPrepare();
PicoIn.writeSound = snd_write;
memset(sndBuffer, 0, sizeof(sndBuffer));
PicoIn.sndOut = sndBuffer;
PsndRerate(0);
/* Setup retro memory maps */
set_memory_maps();
init_frameskip();
return true;
}
bool retro_load_game_special(unsigned game_type, const struct retro_game_info *info, size_t num_info)
{
return false;
}
void retro_unload_game(void)
{
}
unsigned retro_get_region(void)
{
return Pico.m.pal ? RETRO_REGION_PAL : RETRO_REGION_NTSC;
}
void *retro_get_memory_data(unsigned type)
{
uint8_t* data;
switch(type)
{
case RETRO_MEMORY_SAVE_RAM:
/* Note: MCD RAM cart uses Pico.sv.data */
if ((PicoIn.AHW & PAHW_MCD) &&
!(PicoIn.opt & POPT_EN_MCD_RAMCART))
data = Pico_mcd->bram;
else
data = Pico.sv.data;
break;
case RETRO_MEMORY_SYSTEM_RAM:
if (PicoIn.AHW & PAHW_SMS)
data = PicoMem.zram;
else
data = PicoMem.ram;
break;
default:
data = NULL;
break;
}
return data;
}
size_t retro_get_memory_size(unsigned type)
{
unsigned int i;
int sum;
switch(type)
{
case RETRO_MEMORY_SAVE_RAM:
if (PicoIn.AHW & PAHW_MCD)
{
if (PicoIn.opt & POPT_EN_MCD_RAMCART)
return 0x12000;
else /* bram */
return 0x2000;
}
if (Pico.m.frame_count == 0)
return Pico.sv.size;
// if game doesn't write to sram, don't report it to
// libretro so that RA doesn't write out zeroed .srm
for (i = 0, sum = 0; i < Pico.sv.size; i++)
sum |= Pico.sv.data[i];
return (sum != 0) ? Pico.sv.size : 0;
case RETRO_MEMORY_SYSTEM_RAM:
if (PicoIn.AHW & PAHW_SMS)
return 0x2000;
else
return sizeof(PicoMem.ram);
default:
return 0;
}
}
void retro_reset(void)
{
PicoReset();
}
static const unsigned short retro_pico_map[] = {
1 << GBTN_B,
1 << GBTN_A,
1 << GBTN_MODE,
1 << GBTN_START,
1 << GBTN_UP,
1 << GBTN_DOWN,
1 << GBTN_LEFT,
1 << GBTN_RIGHT,
1 << GBTN_C,
1 << GBTN_Y,
1 << GBTN_X,
1 << GBTN_Z,
};
#define RETRO_PICO_MAP_LEN (sizeof(retro_pico_map) / sizeof(retro_pico_map[0]))
static void snd_write(int len)
{
audio_batch_cb(PicoIn.sndOut, len / 4);
}
static enum input_device input_name_to_val(const char *name)
{
if (strcmp(name, "3 button pad") == 0)
return PICO_INPUT_PAD_3BTN;
if (strcmp(name, "6 button pad") == 0)
return PICO_INPUT_PAD_6BTN;
if (strcmp(name, "None") == 0)
return PICO_INPUT_NOTHING;
if (log_cb)
log_cb(RETRO_LOG_WARN, "invalid picodrive_input: '%s'\n", name);
return PICO_INPUT_PAD_3BTN;
}
static void update_variables(bool first_run)
{
struct retro_variable var;
int OldPicoRegionOverride;
float old_user_vout_width;
unsigned old_frameskip_type;
double new_sound_rate;
var.value = NULL;
var.key = "picodrive_input1";
if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value)
PicoSetInputDevice(0, input_name_to_val(var.value));
var.value = NULL;
var.key = "picodrive_input2";
if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value)
PicoSetInputDevice(1, input_name_to_val(var.value));
var.value = NULL;
var.key = "picodrive_sprlim";
if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value) {
if (strcmp(var.value, "enabled") == 0)
PicoIn.opt |= POPT_DIS_SPRITE_LIM;
else
PicoIn.opt &= ~POPT_DIS_SPRITE_LIM;
}
var.value = NULL;
var.key = "picodrive_ramcart";
if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value) {
if (strcmp(var.value, "enabled") == 0)
PicoIn.opt |= POPT_EN_MCD_RAMCART;
else
PicoIn.opt &= ~POPT_EN_MCD_RAMCART;
}
OldPicoRegionOverride = PicoIn.regionOverride;
var.value = NULL;
var.key = "picodrive_region";
if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value) {
if (strcmp(var.value, "Auto") == 0)
PicoIn.regionOverride = 0;
else if (strcmp(var.value, "Japan NTSC") == 0)
PicoIn.regionOverride = 1;
else if (strcmp(var.value, "Japan PAL") == 0)
PicoIn.regionOverride = 2;
else if (strcmp(var.value, "US") == 0)
PicoIn.regionOverride = 4;
else if (strcmp(var.value, "Europe") == 0)
PicoIn.regionOverride = 8;
}
// Update region, fps and sound flags if needed
if (Pico.rom && PicoIn.regionOverride != OldPicoRegionOverride)
{
PicoDetectRegion();
PicoLoopPrepare();
PsndRerate(1);
}
old_user_vout_width = user_vout_width;
var.value = NULL;
var.key = "picodrive_aspect";
if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value) {
if (strcmp(var.value, "4/3") == 0)
user_vout_width = VOUT_4_3;
else if (strcmp(var.value, "CRT") == 0)
user_vout_width = VOUT_CRT;
else
user_vout_width = VOUT_PAR;
}
if (user_vout_width != old_user_vout_width)
{
// Update the geometry
struct retro_system_av_info av_info;
retro_get_system_av_info(&av_info);
environ_cb(RETRO_ENVIRONMENT_SET_GEOMETRY, &av_info);
}
old_show_overscan = show_overscan;
var.value = NULL;
var.key = "picodrive_overscan";
show_overscan = false;
if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value) {
if (strcmp(var.value, "enabled") == 0)
show_overscan = true;
}
if (show_overscan != old_show_overscan)
{
if ((vm_current_start_line != -1) &&
(vm_current_line_count != -1) &&
(vm_current_is_32cols != -1))
emu_video_mode_change(
vm_current_start_line,
vm_current_line_count,
vm_current_is_32cols);
}
var.value = NULL;
var.key = "picodrive_overclk68k";
if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value) {
PicoIn.overclockM68k = 0;
if (var.value[0] == '+')
PicoIn.overclockM68k = atoi(var.value + 1);
}
#ifdef DRC_SH2
var.value = NULL;
var.key = "picodrive_drc";
if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value) {
if (strcmp(var.value, "enabled") == 0)
PicoIn.opt |= POPT_EN_DRC;
else
PicoIn.opt &= ~POPT_EN_DRC;
}
#endif
#ifdef _3DS
if(!ctr_svchack_successful)
PicoIn.opt &= ~POPT_EN_DRC;
#endif
var.value = NULL;
var.key = "picodrive_audio_filter";
PicoIn.sndFilter = 0;
if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value) {
if (strcmp(var.value, "low-pass") == 0)
PicoIn.sndFilter = 1;
}
var.value = NULL;
var.key = "picodrive_lowpass_range";
PicoIn.sndFilterRange = (60 * 65536) / 100;
if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value) {
PicoIn.sndFilterRange = (atoi(var.value) * 65536) / 100;
}
old_frameskip_type = frameskip_type;
frameskip_type = 0;
var.key = "picodrive_frameskip";
if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value) {
if (strcmp(var.value, "auto") == 0)
frameskip_type = 1;
else if (strcmp(var.value, "manual") == 0)
frameskip_type = 2;
}
frameskip_threshold = 33;
var.key = "picodrive_frameskip_threshold";
var.value = NULL;
if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value)
frameskip_threshold = strtol(var.value, NULL, 10);
var.value = NULL;
var.key = "picodrive_renderer";
if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value) {
if (strcmp(var.value, "fast") == 0)
PicoIn.opt |= POPT_ALT_RENDERER;
else
PicoIn.opt &= ~POPT_ALT_RENDERER;
}
var.value = NULL;
var.key = "picodrive_sound_rate";
if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value) {
new_sound_rate = atoi(var.value);
if (new_sound_rate != PicoIn.sndRate) {
/* Update the sound rate */
PicoIn.sndRate = new_sound_rate;
PsndRerate(1);
struct retro_system_av_info av_info;
retro_get_system_av_info(&av_info);
environ_cb(RETRO_ENVIRONMENT_SET_SYSTEM_AV_INFO, &av_info);
}
}
/* Reinitialise frameskipping, if required */
if (((frameskip_type != old_frameskip_type) ||
(Pico.rom && PicoIn.regionOverride != OldPicoRegionOverride)) &&
!first_run)
init_frameskip();
}
void retro_run(void)
{
bool updated = false;
int pad, i;
static void *buff;
PicoIn.skipFrame = 0;
if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE_UPDATE, &updated) && updated)
update_variables(false);
input_poll_cb();
PicoIn.pad[0] = PicoIn.pad[1] = 0;
for (pad = 0; pad < 2; pad++)
for (i = 0; i < RETRO_PICO_MAP_LEN; i++)
if (input_state_cb(pad, RETRO_DEVICE_JOYPAD, 0, i))
PicoIn.pad[pad] |= retro_pico_map[i];
if (PicoPatches)
PicoPatchApply();
/* Check whether current frame should
* be skipped */
if ((frameskip_type > 0) && retro_audio_buff_active) {
switch (frameskip_type)
{
case 1: /* auto */
PicoIn.skipFrame = retro_audio_buff_underrun ? 1 : 0;
break;
case 2: /* manual */
PicoIn.skipFrame = (retro_audio_buff_occupancy < frameskip_threshold) ? 1 : 0;
break;
default:
PicoIn.skipFrame = 0;
break;
}
if (!PicoIn.skipFrame || (frameskip_counter >= FRAMESKIP_MAX)) {
PicoIn.skipFrame = 0;
frameskip_counter = 0;
} else
frameskip_counter++;
}
/* If frameskip settings have changed, update
* frontend audio latency */
if (update_audio_latency) {
environ_cb(RETRO_ENVIRONMENT_SET_MINIMUM_AUDIO_LATENCY,
&audio_latency);
update_audio_latency = false;
}
PicoFrame();
/* If frame was skipped, call video_cb() with
* a NULL buffer and return immediately */
if (PicoIn.skipFrame) {
video_cb(NULL, vout_width, vout_height, vout_width * 2);
return;
}
#if defined(RENDER_GSKIT_PS2)
buff = (uint32_t *)RETRO_HW_FRAME_BUFFER_VALID;
if (!ps2) {
if (!environ_cb(RETRO_ENVIRONMENT_GET_HW_RENDER_INTERFACE, (void **)&ps2) || !ps2) {
printf("Failed to get HW rendering interface!\n");
return;
}
if (ps2->interface_version != RETRO_HW_RENDER_INTERFACE_GSKIT_PS2_VERSION) {
printf("HW render interface mismatch, expected %u, got %u!\n",
RETRO_HW_RENDER_INTERFACE_GSKIT_PS2_VERSION, ps2->interface_version);
return;
}
ps2->coreTexture->Width = vout_width;
ps2->coreTexture->Height = vout_height;
ps2->coreTexture->PSM = GS_PSM_T8;
ps2->coreTexture->ClutPSM = GS_PSM_CT16;
ps2->coreTexture->Filter = GS_FILTER_LINEAR;
ps2->coreTexture->Clut = retro_palette;
}
if (Pico.m.dirtyPal) {
int i;
unsigned short int *pal=(void *)ps2->coreTexture->Clut;
if (PicoIn.AHW & PAHW_SMS) {
// SMS
unsigned int *spal=(void *)PicoMem.cram;
unsigned int *dpal=(void *)pal;
unsigned int t;
/* cram is always stored as shorts, even though real hardware probably uses bytes */
for (i = 0x20/2; i > 0; i--, spal++, dpal++) {
t = *spal;
t = ((t & 0x00030003)<< 3) | ((t & 0x000c000c)<<6) | ((t & 0x00300030)<<9);
t |= t >> 2;
t |= (t >> 4) & 0x08610861;
*dpal = t;
}
pal[0xe0] = 0;
} else if (PicoIn.AHW & PAHW_32X) {
// MCD+32X
} else if (PicoIn.AHW & PAHW_MCD) {
// MCD
} else {
// MD
if(Pico.video.reg[0xC]&8){
do_pal_convert_with_shadows(pal, PicoMem.cram);
} else {
do_pal_convert(pal, PicoMem.cram);
if (Pico.est.rendstatus & PDRAW_SONIC_MODE) {
memcpy(&pal[0x80], pal, 0x40*2);
}
}
}
//Rotate CLUT.
for (i = 0; i < 256; i++) {
if ((i&0x18) == 8) {
unsigned short int tmp = pal[i];
pal[i] = pal[i+8];
pal[i+8] = tmp;
}
}
Pico.m.dirtyPal = 0;
}
if (PicoIn.AHW & PAHW_SMS) {
ps2->coreTexture->Mem = vout_buf;
} else {
ps2->coreTexture->Mem = Pico.est.Draw2FB;
}
ps2->padding = padding;
#else
if (PicoIn.opt & POPT_ALT_RENDERER) {
/* In retro_init, PicoDrawSetOutBuf is called to make sure the output gets written to vout_buf, but this only
* applies to the line renderer (pico/draw.c). The faster tile-based renderer (pico/draw2.c) enabled by
* POPT_ALT_RENDERER writes to Pico.est.Draw2FB, so we need to manually copy that to vout_buf.
*/
/* This section is mostly copied from pemu_finalize_frame in platform/linux/emu.c */
unsigned short *pd = (unsigned short *)vout_buf;
/* Skip the leftmost 8 columns (it seems to be used as some sort of caching or overscan area) */
unsigned char *ps = Pico.est.Draw2FB + 8;
unsigned short *pal = Pico.est.HighPal;
int x;
if (Pico.m.dirtyPal)
PicoDrawUpdateHighPal();
/* Copy up to the max height to include the overscan area, and skip the leftmost 8 columns again */
for (i = 0; i < VOUT_MAX_HEIGHT; i++, ps += 8)
for (x = 0; x < vout_width; x++)
*pd++ = pal[*ps++];
}
buff = (char*)vout_buf + vout_offset;
#endif
video_cb((short *)buff,
vout_width, vout_height, vout_width * 2);
}
void retro_init(void)
{
struct retro_log_callback log;
int level;
level = 0;
environ_cb(RETRO_ENVIRONMENT_SET_PERFORMANCE_LEVEL, &level);
if (environ_cb(RETRO_ENVIRONMENT_GET_LOG_INTERFACE, &log))
log_cb = log.log;
else
log_cb = NULL;
environ_cb(RETRO_ENVIRONMENT_SET_DISK_CONTROL_INTERFACE, &disk_control);
#ifdef _3DS
ctr_svchack_successful = ctr_svchack_init();
check_rosalina();
#elif defined(VITA)
sceBlock = getVMBlock();
#endif
PicoIn.opt = POPT_EN_STEREO|POPT_EN_FM|POPT_EN_PSG|POPT_EN_Z80|POPT_EN_YM2413
| POPT_EN_MCD_PCM|POPT_EN_MCD_CDDA|POPT_EN_MCD_GFX
| POPT_EN_32X|POPT_EN_PWM
| POPT_ACC_SPRITES|POPT_DIS_32C_BORDER;
#ifdef __arm__
#ifdef _3DS
if (ctr_svchack_successful)
#endif
PicoIn.opt |= POPT_EN_DRC;
#endif
struct retro_variable var = { .key = "picodrive_sound_rate" };
if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value)
PicoIn.sndRate = atoi(var.value);
else
PicoIn.sndRate = INITIAL_SND_RATE;
PicoIn.autoRgnOrder = 0x184; // US, EU, JP
vout_width = VOUT_MAX_WIDTH;
vout_height = VOUT_MAX_HEIGHT;
#ifdef _3DS
vout_buf = linearMemAlign(VOUT_MAX_WIDTH * VOUT_MAX_HEIGHT * 2, 0x80);
#elif defined(RENDER_GSKIT_PS2)
vout_buf = memalign(128, VOUT_MAX_WIDTH * VOUT_MAX_HEIGHT);
retro_palette = memalign(128, gsKit_texture_size_ee(16, 16, GS_PSM_CT16));
#else
vout_buf = malloc(VOUT_MAX_WIDTH * VOUT_MAX_HEIGHT * 2);
#endif
PicoInit();
#if defined(RENDER_GSKIT_PS2)
PicoDrawSetOutFormat(PDF_NONE, 0);
PicoDrawSetOutBuf(vout_buf, vout_width);
PicoDrawSetOutputMode4(PDF_8BIT);
#else
PicoDrawSetOutFormat(PDF_RGB555, 0);
PicoDrawSetOutBuf(vout_buf, vout_width * 2);
#endif
//PicoIn.osdMessage = plat_status_msg_busy_next;
PicoIn.mcdTrayOpen = disk_tray_open;
PicoIn.mcdTrayClose = disk_tray_close;
frameskip_type = 0;
frameskip_threshold = 0;
frameskip_counter = 0;
retro_audio_buff_active = false;
retro_audio_buff_occupancy = 0;
retro_audio_buff_underrun = false;
audio_latency = 0;
update_audio_latency = false;
update_variables(true);
}
void retro_deinit(void)
{
#ifdef _3DS
linearFree(vout_buf);
#elif defined(RENDER_GSKIT_PS2)
free(vout_buf);
free(retro_palette);
ps2 = NULL;
#else
free(vout_buf);
#endif
vout_buf = NULL;
PicoExit();
}
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