Add more copyrights

[picodrive.git] / platform / libretro / libretro.c

diff --git a/platform/libretro/libretro.c b/platform/libretro/libretro.c
index 1260f48..061f830 100644 (file)
--- a/platform/libretro/libretro.c
+++ b/platform/libretro/libretro.c
@@ -1,6 +1,8 @@
 /*
  * 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.
@@ -38,6 +40,15 @@ 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 <pico/pico_int.h>
@@ -55,8 +66,14 @@ static retro_audio_sample_batch_t audio_batch_cb;
 
 #define VOUT_MAX_WIDTH 320
 #define VOUT_MAX_HEIGHT 240
+
+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 void *vout_buf;
 static int vout_width, vout_height, vout_offset;
+static float user_vout_width = 0.0;
 
 #ifdef _MSC_VER
 static short sndBuffer[2*44100/50];
@@ -77,14 +94,16 @@ static void snd_write(int len);
 void cache_flush_d_inval_i(void *start, void *end)
 {
 #ifdef __arm__
+   size_t len = (char *)end - (char *)start;
 #if defined(__BLACKBERRY_QNX__)
    msync(start, end - start, MS_SYNC | MS_CACHE_ONLY | MS_INVALIDATE_ICACHE);
 #elif defined(__MACH__)
-   size_t len = (char *)end - (char *)start;
    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
@@ -438,7 +457,8 @@ int plat_mem_set_exec(void *ptr, size_t size)
       exit(1);
    }
 
-
+#elif defined(VITA)
+   int ret = sceKernelOpenVMDomain();
 #else
    int ret = mprotect(ptr, size, PROT_READ | PROT_WRITE | PROT_EXEC);
    if (ret != 0 && log_cb)
@@ -455,6 +475,11 @@ void emu_video_mode_change(int start_line, int line_count, int is_32cols)
 
    vout_height = line_count;
    vout_offset = vout_width * start_line;
+
+   // 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);
 }
 
 void emu_32x_startup(void)
@@ -483,6 +508,7 @@ void retro_set_environment(retro_environment_t cb)
       { "picodrive_ramcart",     "MegaCD RAM cart; disabled|enabled" },
       { "picodrive_region",      "Region; Auto|Japan NTSC|Japan PAL|US|Europe" },
       { "picodrive_region_fps",  "Region FPS; Auto|NTSC|PAL" },
+      { "picodrive_aspect",      "Core-provided aspect ratio; PAR|4/3|CRT" },
 #ifdef DRC_SH2
       { "picodrive_drc", "Dynamic recompilers; enabled|disabled" },
 #endif
@@ -523,11 +549,16 @@ void retro_get_system_av_info(struct retro_system_av_info *info)
    memset(info, 0, sizeof(*info));
    info->timing.fps            = Pico.m.pal ? 50 : 60;
    info->timing.sample_rate    = 44100;
-   info->geometry.base_width   = 320;
+   info->geometry.base_width   = vout_width;
    info->geometry.base_height  = vout_height;
-   info->geometry.max_width    = VOUT_MAX_WIDTH;
-   info->geometry.max_height   = VOUT_MAX_HEIGHT;
-   info->geometry.aspect_ratio = 4.0f / 3.0f;
+   info->geometry.max_width    = vout_width;
+   info->geometry.max_height   = vout_height;
+   
+   float common_width = vout_width;
+   if (user_vout_width != 0)
+      common_width = user_vout_width;
+   
+   info->geometry.aspect_ratio = common_width / vout_height;
 }
 
 /* savestates */
@@ -848,6 +879,22 @@ static const char *find_bios(int *region, const char *cd_fname)
    return NULL;
 }
 
+static void sram_reset()
+{
+   SRam.data = NULL;
+   SRam.start = 0;
+   SRam.end = 0;
+   SRam.flags = '\0';
+   SRam.unused2 = '\0';
+   SRam.changed = '\0' ;
+   SRam.eeprom_type = '\0';
+   SRam.unused3 = '\0';
+   SRam.eeprom_bit_cl = '\0';
+   SRam.eeprom_bit_in = '\0';
+   SRam.eeprom_bit_out = '\0';
+   SRam.size = 0;
+}
+
 bool retro_load_game(const struct retro_game_info *info)
 {
    enum media_type_e media_type;
@@ -904,6 +951,8 @@ bool retro_load_game(const struct retro_game_info *info)
       { 0 },
    };
 
+   sram_reset();
+
    enum retro_pixel_format fmt = RETRO_PIXEL_FORMAT_RGB565;
    if (!environ_cb(RETRO_ENVIRONMENT_SET_PIXEL_FORMAT, &fmt)) {
       if (log_cb)
@@ -1152,6 +1201,26 @@ static void update_variables(void)
       PsndRerate(1);
    }
 
+   float 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);
+   }
+
 #ifdef DRC_SH2
    var.value = NULL;
    var.key = "picodrive_drc";
@@ -1214,6 +1283,8 @@ void retro_init(void)
 
 #ifdef _3DS
    ctr_svchack_successful = ctr_svchack_init();
+#elif defined(VITA)
+   sceBlock = getVMBlock();
 #endif
 
    PicoOpt = POPT_EN_STEREO|POPT_EN_FM|POPT_EN_PSG|POPT_EN_Z80