frontend: do all bpp handling in plugin_lib

[pcsx_rearmed.git] / frontend / libretro.c

diff --git a/frontend/libretro.c b/frontend/libretro.c
index 3b366d4..4f6879e 100644 (file)
--- a/frontend/libretro.c
+++ b/frontend/libretro.c
@@ -13,6 +13,7 @@
 #include "../libpcsxcore/psxcounters.h"
 #include "../libpcsxcore/psxmem_map.h"
 #include "../libpcsxcore/new_dynarec/new_dynarec.h"
+#include "../libpcsxcore/cheat.h"
 #include "../plugins/dfsound/out.h"
 #include "../plugins/gpulib/cspace.h"
 #include "main.h"
@@ -30,9 +31,11 @@ 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 int samples_sent, samples_to_send;
 static int plugins_opened;
+static int is_pal_mode;
 
 /* memory card data */
 extern char Mcd1Data[MCD_SIZE];
@@ -180,6 +183,7 @@ void pl_frame_limit(void)
 
 void pl_timing_prepare(int is_pal)
 {
+       is_pal_mode = is_pal;
 }
 
 void plat_trigger_vibrate(int is_strong)
@@ -252,7 +256,7 @@ void retro_get_system_info(struct retro_system_info *info)
 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;
@@ -261,28 +265,127 @@ void retro_get_system_av_info(struct retro_system_av_info *info)
        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;
 }
 
 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;
 }
 
 bool retro_load_game(const struct retro_game_info *info)
@@ -345,7 +448,7 @@ 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)
@@ -400,9 +503,10 @@ void retro_run(void)
        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_buf : NULL, vout_width, vout_height, vout_width * 2);
+       video_cb((vout_fb_dirty || !vout_can_dupe) ? vout_buf : NULL,
+               vout_width, vout_height, vout_width * 2);
        vout_fb_dirty = 0;
 }
 
@@ -446,6 +550,8 @@ void retro_init(void)
        level = 1;
        environ_cb(RETRO_ENVIRONMENT_SET_PERFORMANCE_LEVEL, &level);
 
+       environ_cb(RETRO_ENVIRONMENT_GET_CAN_DUPE, &vout_can_dupe);
+
        /* 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. */
@@ -458,6 +564,12 @@ void retro_init(void)
        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;
 }
 
 void retro_deinit(void)