libretro: adjust indentation style
[pcsx_rearmed.git] / frontend / libretro.c
index 29276bd..09e833b 100644 (file)
@@ -5,13 +5,22 @@
  * See the COPYING file in the top-level directory.
  */
 
+#define _GNU_SOURCE 1 // strcasestr
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
+#include <strings.h>
 
 #include "../libpcsxcore/misc.h"
 #include "../libpcsxcore/psxcounters.h"
+#include "../libpcsxcore/psxmem_map.h"
 #include "../libpcsxcore/new_dynarec/new_dynarec.h"
+#include "../libpcsxcore/cdrom.h"
+#include "../libpcsxcore/cdriso.h"
+#include "../libpcsxcore/cheat.h"
+#include "../plugins/dfsound/out.h"
+#include "../plugins/dfinput/externals.h"
+#include "cspace.h"
 #include "main.h"
 #include "plugin.h"
 #include "plugin_lib.h"
@@ -26,8 +35,17 @@ static retro_audio_sample_batch_t audio_batch_cb;
 
 static void *vout_buf;
 static int vout_width, vout_height;
+static int vout_doffs_old, vout_fb_dirty;
+static bool vout_can_dupe;
+static bool duping_enable;
+
 static int samples_sent, samples_to_send;
 static int plugins_opened;
+static int is_pal_mode;
+
+/* memory card data */
+extern char Mcd1Data[MCD_SIZE];
+extern char McdDisable[2];
 
 /* PCSX ReARMed core calls and stuff */
 int in_type1, in_type2;
@@ -35,47 +53,133 @@ int in_a1[2] = { 127, 127 }, in_a2[2] = { 127, 127 };
 int in_keystate;
 int in_enable_vibration;
 
+/* PSX max resolution is 640x512, but with enhancement it's 1024x512 */
+#define VOUT_MAX_WIDTH 1024
+#define VOUT_MAX_HEIGHT 512
+
+static void init_memcard(char *mcd_data)
+{
+       unsigned off = 0;
+       unsigned i;
+
+       memset(mcd_data, 0, MCD_SIZE);
+
+       mcd_data[off++] = 'M';
+       mcd_data[off++] = 'C';
+       off += 0x7d;
+       mcd_data[off++] = 0x0e;
+
+       for (i = 0; i < 15; i++) {
+               mcd_data[off++] = 0xa0;
+               off += 0x07;
+               mcd_data[off++] = 0xff;
+               mcd_data[off++] = 0xff;
+               off += 0x75;
+               mcd_data[off++] = 0xa0;
+       }
+
+       for (i = 0; i < 20; i++) {
+               mcd_data[off++] = 0xff;
+               mcd_data[off++] = 0xff;
+               mcd_data[off++] = 0xff;
+               mcd_data[off++] = 0xff;
+               off += 0x04;
+               mcd_data[off++] = 0xff;
+               mcd_data[off++] = 0xff;
+               off += 0x76;
+       }
+}
+
 static int vout_open(void)
 {
        return 0;
 }
 
-static void *vout_set_mode(int w, int h, int bpp)
+static void vout_set_mode(int w, int h, int raw_w, int raw_h, int bpp)
 {
        vout_width = w;
        vout_height = h;
-       return vout_buf;
 }
 
-/* FIXME: either teach PCSX to blit to RGB1555 or RetroArch to support RGB565 */
-static void convert(void *buf, size_t size)
+#ifndef FRONTEND_SUPPORTS_RGB565
+static void convert(void *buf, size_t bytes)
 {
        unsigned int i, v, *p = buf;
 
-       for (i = 0; i < size / 2; i++) {
+       for (i = 0; i < bytes / 4; i++) {
                v = p[i];
                p[i] = (v & 0x001f001f) | ((v >> 1) & 0x7fe07fe0);
        }
 }
+#endif
 
-static void *vout_flip(void)
+static void vout_flip(const void *vram, int stride, int bgr24, int w, int h)
 {
-       pl_rearmed_cbs.flip_cnt++;
-       convert(vout_buf,  vout_width * vout_height * 2);
-       video_cb(vout_buf, vout_width, vout_height, vout_width * 2);
+       unsigned short *dest = vout_buf;
+       const unsigned short *src = vram;
+       int dstride = vout_width, h1 = h;
+       int doffs;
+
+       if (vram == NULL) {
+               // blanking
+               memset(vout_buf, 0, dstride * h * 2);
+               goto out;
+       }
 
-       return vout_buf;
+       doffs = (vout_height - h) * dstride;
+       doffs += (dstride - w) / 2 & ~1;
+       if (doffs != vout_doffs_old) {
+               // clear borders
+               memset(vout_buf, 0, dstride * h * 2);
+               vout_doffs_old = doffs;
+       }
+       dest += doffs;
+
+       if (bgr24)
+       {
+               // XXX: could we switch to RETRO_PIXEL_FORMAT_XRGB8888 here?
+               for (; h1-- > 0; dest += dstride, src += stride)
+               {
+                       bgr888_to_rgb565(dest, src, w * 3);
+               }
+       }
+       else
+       {
+               for (; h1-- > 0; dest += dstride, src += stride)
+               {
+                       bgr555_to_rgb565(dest, src, w * 2);
+               }
+       }
+
+out:
+#ifndef FRONTEND_SUPPORTS_RGB565
+       convert(vout_buf, vout_width * vout_height * 2);
+#endif
+       vout_fb_dirty = 1;
+       pl_rearmed_cbs.flip_cnt++;
 }
 
 static void vout_close(void)
 {
 }
 
+static void *pl_mmap(unsigned int size)
+{
+       return psxMap(0, size, 0, MAP_TAG_VRAM);
+}
+
+static void pl_munmap(void *ptr, unsigned int size)
+{
+       psxUnmap(ptr, size, MAP_TAG_VRAM);
+}
+
 struct rearmed_cbs pl_rearmed_cbs = {
        .pl_vout_open = vout_open,
        .pl_vout_set_mode = vout_set_mode,
        .pl_vout_flip = vout_flip,
        .pl_vout_close = vout_close,
+       .mmap = pl_mmap,
+       .munmap = pl_munmap,
        /* from psxcounters */
        .gpu_hcnt = &hSyncCount,
        .gpu_frame_count = &frame_counter,
@@ -89,26 +193,28 @@ void pl_frame_limit(void)
 
 void pl_timing_prepare(int is_pal)
 {
+       is_pal_mode = is_pal;
 }
 
 void plat_trigger_vibrate(int is_strong)
 {
 }
 
-void pl_update_gun(int *xn, int *xres, int *y, int *in)
+void pl_update_gun(int *xn, int *yn, int *xres, int *yres, int *in)
 {
 }
 
 /* sound calls */
-void SetupSound(void)
+static int snd_init(void)
 {
+       return 0;
 }
 
-void RemoveSound(void)
+static void snd_finish(void)
 {
 }
 
-unsigned long SoundGetBytesBuffered(void)
+static int snd_busy(void)
 {
        if (samples_to_send > samples_sent)
                return 0; /* give more samples */
@@ -116,14 +222,45 @@ unsigned long SoundGetBytesBuffered(void)
                return 1;
 }
 
-void SoundFeedStreamData(void *buf, long bytes)
+static void snd_feed(void *buf, int bytes)
 {
        audio_batch_cb(buf, bytes / 4);
        samples_sent += bytes / 4;
 }
 
+void out_register_libretro(struct out_driver *drv)
+{
+       drv->name = "libretro";
+       drv->init = snd_init;
+       drv->finish = snd_finish;
+       drv->busy = snd_busy;
+       drv->feed = snd_feed;
+}
+
 /* libretro */
-void retro_set_environment(retro_environment_t cb) { environ_cb = cb; }
+void retro_set_environment(retro_environment_t cb)
+{
+   static const struct retro_variable vars[] = {
+      { "frameskip", "Frameskip; 0|1|2|3" },
+      { "region", "Region; Auto|NTSC|PAL" },
+      { "pad1type", "Pad 1 Type; standard|analog" },
+#ifndef DRC_DISABLE
+      { "rearmed_drc", "Dynamic recompiler; enabled|disabled" },
+#endif
+#ifdef __ARM_NEON__
+      { "neon_interlace_enable", "Enable interlacing mode(s); disabled|enabled" },
+      { "neon_enhancement_enable", "Enhanced resolution (slow); disabled|enabled" },
+      { "neon_enhancement_no_main", "Enhanced resolution speed hack; disabled|enabled" },
+#endif
+      { "pcsx_rearmed_duping_enable", "Frame duping; on|off" },
+      { NULL, NULL },
+   };
+
+   environ_cb = cb;
+
+   cb(RETRO_ENVIRONMENT_SET_VARIABLES, (void*)vars);
+}
+
 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; }
@@ -143,59 +280,399 @@ void retro_get_system_info(struct retro_system_info *info)
 {
        memset(info, 0, sizeof(*info));
        info->library_name = "PCSX-ReARMed";
-       info->library_version = REV;
-       info->valid_extensions = "bin|cue|img|mdf|pbp|cbn";
+       info->library_version = "r19";
+       info->valid_extensions = "bin|cue|img|mdf|pbp|toc|cbn|m3u";
        info->need_fullpath = true;
 }
 
 void retro_get_system_av_info(struct retro_system_av_info *info)
 {
        memset(info, 0, sizeof(*info));
-       info->timing.fps            = 60;
+       info->timing.fps            = is_pal_mode ? 50 : 60;
        info->timing.sample_rate    = 44100;
        info->geometry.base_width   = 320;
        info->geometry.base_height  = 240;
-       info->geometry.max_width    = 640;
-       info->geometry.max_height   = 512;
+       info->geometry.max_width    = VOUT_MAX_WIDTH;
+       info->geometry.max_height   = VOUT_MAX_HEIGHT;
        info->geometry.aspect_ratio = 4.0 / 3.0;
 }
 
-/* TODO */
+/* savestates */
 size_t retro_serialize_size(void) 
 { 
-       return 0;
+       // it's currently 4380651 bytes, but have some reserved for future
+       return 0x430000;
+}
+
+struct save_fp {
+       char *buf;
+       size_t pos;
+       int is_write;
+};
+
+static void *save_open(const char *name, const char *mode)
+{
+       struct save_fp *fp;
+
+       if (name == NULL || mode == NULL)
+               return NULL;
+
+       fp = malloc(sizeof(*fp));
+       if (fp == NULL)
+               return NULL;
+
+       fp->buf = (char *)name;
+       fp->pos = 0;
+       fp->is_write = (mode[0] == 'w' || mode[1] == 'w');
+
+       return fp;
+}
+
+static int save_read(void *file, void *buf, u32 len)
+{
+       struct save_fp *fp = file;
+       if (fp == NULL || buf == NULL)
+               return -1;
+
+       memcpy(buf, fp->buf + fp->pos, len);
+       fp->pos += len;
+       return len;
+}
+
+static int save_write(void *file, const void *buf, u32 len)
+{
+       struct save_fp *fp = file;
+       if (fp == NULL || buf == NULL)
+               return -1;
+
+       memcpy(fp->buf + fp->pos, buf, len);
+       fp->pos += len;
+       return len;
+}
+
+static long save_seek(void *file, long offs, int whence)
+{
+       struct save_fp *fp = file;
+       if (fp == NULL)
+               return -1;
+
+       switch (whence) {
+       case SEEK_CUR:
+               fp->pos += offs;
+               return fp->pos;
+       case SEEK_SET:
+               fp->pos = offs;
+               return fp->pos;
+       default:
+               return -1;
+       }
+}
+
+static void save_close(void *file)
+{
+       struct save_fp *fp = file;
+       size_t r_size = retro_serialize_size();
+       if (fp == NULL)
+               return;
+
+       if (fp->pos > r_size)
+               SysPrintf("ERROR: save buffer overflow detected\n");
+       else if (fp->is_write && fp->pos < r_size)
+               // make sure we don't save trash in leftover space
+               memset(fp->buf + fp->pos, 0, r_size - fp->pos);
+       free(fp);
 }
 
 bool retro_serialize(void *data, size_t size)
 { 
-       return false;
+       int ret = SaveState(data);
+       return ret == 0 ? true : false;
 }
 
 bool retro_unserialize(const void *data, size_t size)
 {
-       return false;
+       int ret = LoadState(data);
+       return ret == 0 ? true : false;
 }
 
+/* cheats */
 void retro_cheat_reset(void)
 {
+       ClearAllCheats();
 }
 
 void retro_cheat_set(unsigned index, bool enabled, const char *code)
 {
+       char buf[256];
+       int ret;
+
+       // cheat funcs are destructive, need a copy..
+       strncpy(buf, code, sizeof(buf));
+       buf[sizeof(buf) - 1] = 0;
+
+       if (index < NumCheats)
+               ret = EditCheat(index, "", buf);
+       else
+               ret = AddCheat("", buf);
+
+       if (ret != 0)
+               SysPrintf("Failed to set cheat %#u\n", index);
+       else if (index < NumCheats)
+               Cheats[index].Enabled = enabled;
+}
+
+/* multidisk support */
+static bool disk_ejected;
+static unsigned int disk_current_index;
+static unsigned int disk_count;
+static struct disks_state {
+       char *fname;
+       int internal_index; // for multidisk eboots
+} disks[8];
+
+static bool disk_set_eject_state(bool ejected)
+{
+       // weird PCSX API..
+       SetCdOpenCaseTime(ejected ? -1 : (time(NULL) + 2));
+       LidInterrupt();
+
+       disk_ejected = ejected;
+       return true;
+}
+
+static bool disk_get_eject_state(void)
+{
+       /* can't be controlled by emulated software */
+       return disk_ejected;
+}
+
+static unsigned int disk_get_image_index(void)
+{
+       return disk_current_index;
+}
+
+static bool disk_set_image_index(unsigned int index)
+{
+       if (index >= sizeof(disks) / sizeof(disks[0]))
+               return false;
+
+       CdromId[0] = '\0';
+       CdromLabel[0] = '\0';
+
+       if (disks[index].fname == NULL) {
+               SysPrintf("missing disk #%u\n", index);
+               CDR_shutdown();
+
+               // RetroArch specifies "no disk" with index == count,
+               // so don't fail here..
+               disk_current_index = index;
+               return true;
+       }
+
+       SysPrintf("switching to disk %u: \"%s\" #%d\n", index,
+               disks[index].fname, disks[index].internal_index);
+
+       cdrIsoMultidiskSelect = disks[index].internal_index;
+       set_cd_image(disks[index].fname);
+       if (ReloadCdromPlugin() < 0) {
+               SysPrintf("failed to load cdr plugin\n");
+               return false;
+       }
+       if (CDR_open() < 0) {
+               SysPrintf("failed to open cdr plugin\n");
+               return false;
+       }
+
+       if (!disk_ejected) {
+               SetCdOpenCaseTime(time(NULL) + 2);
+               LidInterrupt();
+       }
+
+       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)
+{
+       char *old_fname;
+       bool ret = true;
+
+       if (index >= sizeof(disks) / sizeof(disks[0]))
+               return false;
+
+       old_fname = disks[index].fname;
+       disks[index].fname = NULL;
+       disks[index].internal_index = 0;
+
+       if (info != NULL) {
+               disks[index].fname = strdup(info->path);
+               if (index == disk_current_index)
+                       ret = disk_set_image_index(index);
+       }
+
+       if (old_fname != NULL)
+               free(old_fname);
+
+       return ret;
+}
+
+static bool disk_add_image_index(void)
+{
+       if (disk_count >= 8)
+               return false;
+
+       disk_count++;
+       return true;
 }
 
+static struct retro_disk_control_callback disk_control = {
+       .set_eject_state = disk_set_eject_state,
+       .get_eject_state = disk_get_eject_state,
+       .get_image_index = disk_get_image_index,
+       .set_image_index = disk_set_image_index,
+       .get_num_images = disk_get_num_images,
+       .replace_image_index = disk_replace_image_index,
+       .add_image_index = disk_add_image_index,
+};
+
+// just in case, maybe a win-rt port in the future?
+#ifdef _WIN32
+#define SLASH '\\'
+#else
+#define SLASH '/'
+#endif
+
+static char base_dir[PATH_MAX];
+
+static bool read_m3u(const char *file)
+{
+       char line[PATH_MAX];
+       char name[PATH_MAX];
+       FILE *f = fopen(file, "r");
+       if (!f)
+               return false;
+
+       while (fgets(line, sizeof(line), f) && disk_count < sizeof(disks) / sizeof(disks[0])) {
+               if (line[0] == '#')
+                       continue;
+               char *carrige_return = strchr(line, '\r');
+               if (carrige_return)
+                       *carrige_return = '\0';
+               char *newline = strchr(line, '\n');
+               if (newline)
+                       *newline = '\0';
+
+               if (line[0] != '\0')
+               {
+                       snprintf(name, sizeof(name), "%s%c%s", base_dir, SLASH, line);
+                       disks[disk_count++].fname = strdup(name);
+               }
+       }
+
+       fclose(f);
+       return (disk_count != 0);
+}
+
+static void extract_directory(char *buf, const char *path, size_t size)
+{
+   char *base;
+   strncpy(buf, path, size - 1);
+   buf[size - 1] = '\0';
+
+   base = strrchr(buf, '/');
+   if (!base)
+      base = strrchr(buf, '\\');
+
+   if (base)
+      *base = '\0';
+   else
+   {
+      buf[0] = '.';
+      buf[1] = '\0';
+   }
+}
+
+#ifdef __QNX__
+/* Blackberry QNX doesn't have strcasestr */
+
+/*
+ * Find the first occurrence of find in s, ignore case.
+ */
+char *
+strcasestr(const char *s, const char*find)
+{
+       char c, sc;
+       size_t len;
+
+       if ((c = *find++) != 0) {
+               c = tolower((unsigned char)c);
+               len = strlen(find);
+               do {
+                       do {
+                               if ((sc = *s++) == 0)
+                                       return (NULL);
+                       } while ((char)tolower((unsigned char)sc) != c);
+               } while (strncasecmp(s, find, len) != 0);
+               s--;
+       }
+       return ((char *)s);
+}
+#endif
+
 bool retro_load_game(const struct retro_game_info *info)
 {
+       size_t i;
+       bool is_m3u = (strcasestr(info->path, ".m3u") != NULL);
+
+#ifdef FRONTEND_SUPPORTS_RGB565
+       enum retro_pixel_format fmt = RETRO_PIXEL_FORMAT_RGB565;
+       if (environ_cb(RETRO_ENVIRONMENT_SET_PIXEL_FORMAT, &fmt)) {
+               SysPrintf("RGB565 supported, using it\n");
+       }
+#endif
+
+       if (info == NULL || info->path == NULL) {
+               SysPrintf("info->path required\n");
+               return false;
+       }
+
        if (plugins_opened) {
                ClosePlugins();
                plugins_opened = 0;
        }
 
-       set_cd_image(info->path);
+       for (i = 0; i < sizeof(disks) / sizeof(disks[0]); i++) {
+               if (disks[i].fname != NULL) {
+                       free(disks[i].fname);
+                       disks[i].fname = NULL;
+               }
+               disks[i].internal_index = 0;
+       }
+
+       disk_current_index = 0;
+       extract_directory(base_dir, info->path, sizeof(base_dir));
+
+       if (is_m3u) {
+               if (!read_m3u(info->path)) {
+                       SysPrintf("failed to read m3u file\n");
+                       return false;
+               }
+       } else {
+               disk_count = 1;
+               disks[0].fname = strdup(info->path);
+       }
+
+       set_cd_image(disks[0].fname);
 
        /* have to reload after set_cd_image for correct cdr plugin */
        if (LoadPlugins() == -1) {
-               printf("faled to load plugins\n");
+               SysPrintf("failed to load plugins\n");
                return false;
        }
 
@@ -203,25 +680,35 @@ bool retro_load_game(const struct retro_game_info *info)
        NetOpened = 0;
 
        if (OpenPlugins() == -1) {
-               printf("faled to open plugins\n");
+               SysPrintf("failed to open plugins\n");
                return false;
        }
 
        plugin_call_rearmed_cbs();
+       dfinput_activate();
 
        Config.PsxAuto = 1;
        if (CheckCdrom() == -1) {
-               printf("unsupported/invalid CD image: %s\n", info->path);
+               SysPrintf("unsupported/invalid CD image: %s\n", info->path);
                return false;
        }
 
        SysReset();
 
        if (LoadCdrom() == -1) {
-               printf("could not load CD-ROM!\n");
+               SysPrintf("could not load CD-ROM!\n");
                return false;
        }
-       emu_on_new_cd();
+       emu_on_new_cd(0);
+
+       // multidisk images
+       if (!is_m3u) {
+               disk_count = cdrIsoMultidiskCount < 8 ? cdrIsoMultidiskCount : 8;
+               for (i = 1; i < sizeof(disks) / sizeof(disks[0]) && i < cdrIsoMultidiskCount; i++) {
+                       disks[i].fname = strdup(info->path);
+                       disks[i].internal_index = i;
+               }
+       }
 
        return true;
 }
@@ -237,17 +724,23 @@ void retro_unload_game(void)
 
 unsigned retro_get_region(void)
 {
-       return RETRO_REGION_NTSC;
+       return is_pal_mode ? RETRO_REGION_PAL : RETRO_REGION_NTSC;
 }
 
 void *retro_get_memory_data(unsigned id)
 {
-       return NULL;
+       if (id == RETRO_MEMORY_SAVE_RAM)
+               return Mcd1Data;
+       else
+               return NULL;
 }
 
 size_t retro_get_memory_size(unsigned id)
 {
-       return 0;
+       if (id == RETRO_MEMORY_SAVE_RAM)
+               return MCD_SIZE;
+       else
+               return 0;
 }
 
 void retro_reset(void)
@@ -275,11 +768,131 @@ static const unsigned short retro_psx_map[] = {
 };
 #define RETRO_PSX_MAP_LEN (sizeof(retro_psx_map) / sizeof(retro_psx_map[0]))
 
+static void update_variables(bool in_flight)
+{
+   struct retro_variable var;
+   
+   var.value = NULL;
+   var.key = "frameskip";
+
+   if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) || var.value)
+      pl_rearmed_cbs.frameskip = atoi(var.value);
+
+   var.value = NULL;
+   var.key = "region";
+
+   if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) || var.value)
+   {
+      Config.PsxAuto = 0;
+      if (strcmp(var.value, "Automatic") == 0)
+         Config.PsxAuto = 1;
+      else if (strcmp(var.value, "NTSC") == 0)
+         Config.PsxType = 0;
+      else if (strcmp(var.value, "PAL") == 0)
+         Config.PsxType = 1;
+   }
+
+   var.value = NULL;
+   var.key = "pad1type";
+
+   if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) || var.value)
+   {
+      in_type1 = PSE_PAD_TYPE_STANDARD;
+      if (strcmp(var.value, "analog") == 0)
+         in_type1 = PSE_PAD_TYPE_ANALOGPAD;
+   }
+
+#ifdef __ARM_NEON__
+   var.value = "NULL";
+   var.key = "neon_interlace_enable";
+
+   if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) || var.value)
+   {
+      if (strcmp(var.value, "disabled") == 0)
+         pl_rearmed_cbs.gpu_neon.allow_interlace = 0;
+      else if (strcmp(var.value, "enabled") == 0)
+         pl_rearmed_cbs.gpu_neon.allow_interlace = 1;
+   }
+
+   var.value = NULL;
+   var.key = "neon_enhancement_enable";
+
+   if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) || var.value)
+   {
+      if (strcmp(var.value, "disabled") == 0)
+         pl_rearmed_cbs.gpu_neon.enhancement_enable = 0;
+      else if (strcmp(var.value, "enabled") == 0)
+         pl_rearmed_cbs.gpu_neon.enhancement_enable = 1;
+   }
+
+   var.value = NULL;
+   var.key = "neon_enhancement_no_main";
+
+   if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) || var.value)
+   {
+      if (strcmp(var.value, "disabled") == 0)
+         pl_rearmed_cbs.gpu_neon.enhancement_no_main = 0;
+      else if (strcmp(var.value, "enabled") == 0)
+         pl_rearmed_cbs.gpu_neon.enhancement_no_main = 1;
+   }
+#endif
+
+   var.value = "NULL";
+   var.key = "pcsx_rearmed_duping_enable";
+
+   if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) || var.value)
+   {
+      if (strcmp(var.value, "off") == 0)
+         duping_enable = false;
+      else if (strcmp(var.value, "on") == 0)
+         duping_enable = true;
+   }
+
+#ifndef DRC_DISABLE
+   var.value = NULL;
+   var.key = "rearmed_drc";
+
+   if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) || var.value)
+   {
+      R3000Acpu *prev_cpu = psxCpu;
+
+      if (strcmp(var.value, "disabled") == 0)
+         Config.Cpu = CPU_INTERPRETER;
+      else if (strcmp(var.value, "enabled") == 0)
+         Config.Cpu = CPU_DYNAREC;
+
+      psxCpu = (Config.Cpu == CPU_INTERPRETER) ? &psxInt : &psxRec;
+      if (psxCpu != prev_cpu) {
+         prev_cpu->Shutdown();
+         psxCpu->Init();
+         psxCpu->Reset(); // not really a reset..
+      }
+   }
+#endif
+
+   if (in_flight) {
+      // inform core things about possible config changes
+      plugin_call_rearmed_cbs();
+
+      if (GPU_open != NULL && GPU_close != NULL) {
+         GPU_close();
+         GPU_open(&gpuDisp, "PCSX", NULL);
+      }
+
+      dfinput_activate();
+   }
+}
+
 void retro_run(void) 
 {
        int i;
 
        input_poll_cb();
+
+       bool updated = false;
+       if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE_UPDATE, &updated) && updated)
+               update_variables(true);
+
        in_keystate = 0;
        for (i = 0; i < RETRO_PSX_MAP_LEN; i++)
                if (input_state_cb(1, RETRO_DEVICE_JOYPAD, 0, i))
@@ -289,10 +902,82 @@ void retro_run(void)
                if (input_state_cb(0, RETRO_DEVICE_JOYPAD, 0, i))
                        in_keystate |= retro_psx_map[i];
 
+       if (in_type1 == PSE_PAD_TYPE_ANALOGPAD)
+       {
+               in_a1[0] = (input_state_cb(0, RETRO_DEVICE_ANALOG, RETRO_DEVICE_INDEX_ANALOG_LEFT, RETRO_DEVICE_ID_ANALOG_X) / 256) + 128;
+               in_a1[1] = (input_state_cb(0, RETRO_DEVICE_ANALOG, RETRO_DEVICE_INDEX_ANALOG_LEFT, RETRO_DEVICE_ID_ANALOG_Y) / 256) + 128;
+               in_a2[0] = (input_state_cb(0, RETRO_DEVICE_ANALOG, RETRO_DEVICE_INDEX_ANALOG_RIGHT, RETRO_DEVICE_ID_ANALOG_X) / 256) + 128;
+               in_a2[1] = (input_state_cb(0, RETRO_DEVICE_ANALOG, RETRO_DEVICE_INDEX_ANALOG_RIGHT, RETRO_DEVICE_ID_ANALOG_Y) / 256) + 128;
+       }
+
        stop = 0;
        psxCpu->Execute();
 
-       samples_to_send += 44100 / 60;
+       samples_to_send += is_pal_mode ? 44100 / 50 : 44100 / 60;
+
+       video_cb((vout_fb_dirty || !vout_can_dupe || !duping_enable) ? vout_buf : NULL,
+               vout_width, vout_height, vout_width * 2);
+       vout_fb_dirty = 0;
+}
+
+static bool try_use_bios(const char *path)
+{
+       FILE *f;
+       long size;
+       const char *name;
+
+       f = fopen(path, "rb");
+       if (f == NULL)
+               return false;
+
+       fseek(f, 0, SEEK_END);
+       size = ftell(f);
+       fclose(f);
+
+       if (size != 512 * 1024)
+               return false;
+
+       name = strrchr(path, SLASH);
+       if (name++ == NULL)
+               name = path;
+       snprintf(Config.Bios, sizeof(Config.Bios), "%s", name);
+       return true;
+}
+
+#if 1
+#include <sys/types.h>
+#include <dirent.h>
+
+static bool find_any_bios(const char *dirpath, char *path, size_t path_size)
+{
+       DIR *dir;
+       struct dirent *ent;
+       bool ret = false;
+
+       dir = opendir(dirpath);
+       if (dir == NULL)
+               return false;
+
+       while ((ent = readdir(dir))) {
+               if (strncasecmp(ent->d_name, "scph", 4) != 0)
+                       continue;
+
+               snprintf(path, path_size, "%s/%s", dirpath, ent->d_name);
+               ret = try_use_bios(path);
+               if (ret)
+                       break;
+       }
+       closedir(dir);
+       return ret;
+}
+#else
+#define find_any_bios(...) false
+#endif
+
+static void check_system_specs(void)
+{
+   unsigned level = 6;
+   environ_cb(RETRO_ENVIRONMENT_SET_PERFORMANCE_LEVEL, &level);
 }
 
 void retro_init(void)
@@ -300,17 +985,21 @@ void retro_init(void)
        const char *bios[] = { "scph1001", "scph5501", "scph7001" };
        const char *dir;
        char path[256];
-       FILE *f = NULL;
        int i, ret, level;
+       bool found_bios = false;
 
        ret = emu_core_preinit();
        ret |= emu_core_init();
        if (ret != 0) {
-               printf("PCSX init failed, sorry\n");
+               SysPrintf("PCSX init failed.\n");
                exit(1);
        }
 
-       vout_buf = malloc(640 * 512 * 2);
+#if defined(_POSIX_C_SOURCE) && (_POSIX_C_SOURCE >= 200112L)
+       posix_memalign(&vout_buf, 16, VOUT_MAX_WIDTH * VOUT_MAX_HEIGHT * 2);
+#else
+       vout_buf = malloc(VOUT_MAX_WIDTH * VOUT_MAX_HEIGHT * 2);
+#endif
 
        if (environ_cb(RETRO_ENVIRONMENT_GET_SYSTEM_DIRECTORY, &dir) && dir)
        {
@@ -318,22 +1007,55 @@ void retro_init(void)
 
                for (i = 0; i < sizeof(bios) / sizeof(bios[0]); i++) {
                        snprintf(path, sizeof(path), "%s/%s.bin", dir, bios[i]);
-                       f = fopen(path, "r");
-                       if (f != NULL) {
-                               snprintf(Config.Bios, sizeof(Config.Bios), "%s.bin", bios[i]);
+                       found_bios = try_use_bios(path);
+                       if (found_bios)
                                break;
-                       }
                }
+
+               if (!found_bios)
+                       found_bios = find_any_bios(dir, path, sizeof(path));
        }
-       if (f != NULL) {
-               printf("found BIOS file: %s\n", Config.Bios);
-               fclose(f);
+       if (found_bios) {
+               SysPrintf("found BIOS file: %s\n", Config.Bios);
        }
        else
-               printf("no BIOS files found.\n");
+       {
+               SysPrintf("no BIOS files found.\n");
+               struct retro_message msg = 
+               {
+                       "no BIOS found, expect bugs!",
+                       180
+               };
+               environ_cb(RETRO_ENVIRONMENT_SET_MESSAGE, (void*)&msg);
+       }
 
        level = 1;
        environ_cb(RETRO_ENVIRONMENT_SET_PERFORMANCE_LEVEL, &level);
+
+       environ_cb(RETRO_ENVIRONMENT_GET_CAN_DUPE, &vout_can_dupe);
+       environ_cb(RETRO_ENVIRONMENT_SET_DISK_CONTROL_INTERFACE, &disk_control);
+
+       /* Set how much slower PSX CPU runs * 100 (so that 200 is 2 times)
+        * we have to do this because cache misses and some IO penalties
+        * are not emulated. Warning: changing this may break compatibility. */
+#ifdef __ARM_ARCH_7A__
+       cycle_multiplier = 175;
+#else
+       cycle_multiplier = 200;
+#endif
+
+       McdDisable[0] = 0;
+       McdDisable[1] = 1;
+       init_memcard(Mcd1Data);
+
+       SaveFuncs.open = save_open;
+       SaveFuncs.read = save_read;
+       SaveFuncs.write = save_write;
+       SaveFuncs.seek = save_seek;
+       SaveFuncs.close = save_close;
+
+       update_variables(false);
+       check_system_specs();
 }
 
 void retro_deinit(void)
@@ -342,4 +1064,3 @@ void retro_deinit(void)
        free(vout_buf);
        vout_buf = NULL;
 }
-