cd: switch to CD drive emu code from genplus

[picodrive.git] / pico / cd / buffering.c

diff --git a/pico/cd/buffering.c b/pico/cd/buffering.c
deleted file mode 100644 (file)
index 8420336..0000000
--- a/pico/cd/buffering.c
+++ /dev/null
@@ -1,152 +0,0 @@
-/*
- * Buffering handling
- * (C) notaz, 2007,2008
- *
- * This work is licensed under the terms of MAME license.
- * See COPYING file in the top-level directory.
- */
-
-#include "../pico_int.h"
-#include "../cd/cue.h"
-
-int PicoCDBuffers = 0;
-static unsigned char *cd_buffer = NULL;
-static int prev_lba = 0x80000000;
-
-static int hits, reads;
-
-#undef dprintf
-#define dprintf(...)
-
-void PicoCDBufferInit(void)
-{
-       void *tmp = NULL;
-
-       prev_lba = 0x80000000;
-       hits = reads = 0;
-
-       if (PicoCDBuffers <= 1) {
-               PicoCDBuffers = 0;
-               return; /* buffering off */
-       }
-
-       /* try alloc'ing until we succeed */
-       while (PicoCDBuffers > 0)
-       {
-               tmp = realloc(cd_buffer, PicoCDBuffers * 2048 + 304);
-               if (tmp != NULL) break;
-               PicoCDBuffers >>= 1;
-       }
-
-       if (PicoCDBuffers <= 0) return; /* buffering became off */
-
-       cd_buffer = tmp;
-}
-
-
-void PicoCDBufferFree(void)
-{
-       if (cd_buffer) {
-               free(cd_buffer);
-               cd_buffer = NULL;
-       }
-       if (reads)
-               elprintf(EL_STATUS, "CD buffer hits: %i/%i (%i%%)\n", hits, reads, hits * 100 / reads);
-}
-
-
-void PicoCDBufferFlush(void)
-{
-       prev_lba = 0x80000000;
-}
-
-
-/* this is was a try to fight slow SD access of GP2X */
-PICO_INTERNAL void PicoCDBufferRead(void *dest, int lba)
-{
-       int is_bin, offs, read_len, moved = 0;
-       reads++;
-
-       is_bin = Pico_mcd->TOC.Tracks[0].ftype == CT_BIN;
-
-       if (PicoCDBuffers <= 0)
-       {
-               /* no buffering */
-               int where_seek = is_bin ? (lba * 2352 + 16) : (lba << 11);
-               pm_seek(Pico_mcd->TOC.Tracks[0].F, where_seek, SEEK_SET);
-               pm_read(dest, 2048, Pico_mcd->TOC.Tracks[0].F);
-               return;
-       }
-
-       /* hit? */
-       offs = lba - prev_lba;
-       if (offs >= 0 && offs < PicoCDBuffers)
-       {
-               hits++;
-               if (offs == 0) dprintf("CD buffer seek to old %i -> %i\n", prev_lba, lba);
-               memcpy32(dest, (int *)(cd_buffer + offs*2048), 2048/4);
-               return;
-       }
-
-       if (prev_lba + PicoCDBuffers != lba)
-       {
-               int where_seek = is_bin ? (lba * 2352 + 16) : (lba << 11);
-               dprintf("CD buffer seek %i -> %i\n", prev_lba, lba);
-               pm_seek(Pico_mcd->TOC.Tracks[0].F, where_seek, SEEK_SET);
-       }
-
-       dprintf("CD buffer miss %i -> %i\n", prev_lba, lba);
-
-       if (lba < prev_lba && prev_lba - lba < PicoCDBuffers)
-       {
-               read_len = prev_lba - lba;
-               dprintf("CD buffer move=%i, read_len=%i", PicoCDBuffers - read_len, read_len);
-               memmove(cd_buffer + read_len*2048, cd_buffer, (PicoCDBuffers - read_len)*2048);
-               moved = 1;
-       }
-       else
-       {
-               read_len = PicoCDBuffers;
-       }
-
-       if (PicoMessage != NULL && read_len >= 512)
-       {
-               PicoMessage("Buffering data...");
-       }
-
-       if (is_bin)
-       {
-               int i = 0;
-#ifdef _PSP_FW_VERSION
-               int bufs = (read_len*2048) / (2048+304);
-               pm_read(cd_buffer, bufs*(2048+304), Pico_mcd->TOC.Tracks[0].F);
-               for (i = 1; i < bufs; i++)
-                       // should really use memmove here, but my memcpy32 implementation is also suitable here
-                       memcpy32((int *)(cd_buffer + i*2048), (int *)(cd_buffer + i*(2048+304)), 2048/4);
-#endif
-               for (; i < read_len - 1; i++)
-               {
-                       pm_read(cd_buffer + i*2048, 2048 + 304, Pico_mcd->TOC.Tracks[0].F);
-                       // pm_seek(Pico_mcd->TOC.Tracks[0].F, 304, SEEK_CUR); // seeking is slower, in PSP case even more
-               }
-               // further data might be moved, do not overwrite
-               pm_read(cd_buffer + i*2048, 2048, Pico_mcd->TOC.Tracks[0].F);
-               pm_seek(Pico_mcd->TOC.Tracks[0].F, 304, SEEK_CUR);
-       }
-       else
-       {
-               pm_read(cd_buffer, read_len*2048, Pico_mcd->TOC.Tracks[0].F);
-       }
-       memcpy32(dest, (int *) cd_buffer, 2048/4);
-       prev_lba = lba;
-
-       if (moved)
-       {
-               /* file pointer must point to the same data in file, as would-be data after our buffer */
-               int where_seek;
-               lba += PicoCDBuffers;
-               where_seek = is_bin ? (lba * 2352 + 16) : (lba << 11);
-               pm_seek(Pico_mcd->TOC.Tracks[0].F, where_seek, SEEK_SET);
-       }
-}
-