UINT32 hard_disk_write(struct hard_disk_file *file, UINT32 lbasector, UINT32 numsectors, const void *buffer)
{
UINT32 hunknum = lbasector / file->hunksectors;
UINT32 sectoroffs = lbasector % file->hunksectors;
/* for now, just break down multisector writes into single sectors */
if (numsectors > 1)
{
UINT32 total = 0;
while (numsectors--)
{
if (hard_disk_write(file, lbasector++, 1, (const UINT8 *)buffer + total * file->info.sectorbytes))
total++;
else
break;
}
return total;
}
/* if we haven't cached this hunk, read it now */
if (file->cachehunk != hunknum)
{
if (!chd_read(file->chd, hunknum, 1, file->cache))
return 0;
file->cachehunk = hunknum;
}
/* copy in the requested data */
memcpy(&file->cache[sectoroffs * file->info.sectorbytes], buffer, file->info.sectorbytes);
/* write it back out */
if (chd_write(file->chd, hunknum, 1, file->cache))
return 1;
return 0;
}
UINT32 hard_disk_read(struct hard_disk_file *file, UINT32 lbasector, UINT32 numsectors, void *buffer)
{
UINT32 hunknum = lbasector / file->hunksectors;
UINT32 sectoroffs = lbasector % file->hunksectors;
/* for now, just break down multisector reads into single sectors */
if (numsectors > 1)
{
UINT32 total = 0;
while (numsectors--)
{
if (hard_disk_read(file, lbasector++, 1, (UINT8 *)buffer + total * file->info.sectorbytes))
total++;
else
break;
}
return total;
}
// printf("HDD: rd lba %x\n", lbasector);
/* if we haven't cached this hunk, read it now */
if (file->cachehunk != hunknum)
{
if (!chd_read(file->chd, hunknum, 1, file->cache))
return 0;
file->cachehunk = hunknum;
}
/* copy out the requested sector */
memcpy(buffer, &file->cache[sectoroffs * file->info.sectorbytes], file->info.sectorbytes);
return 1;
}
static int read_chd(void *file, int frame, bitmap_yuy16 &bitmap, INT16 *lsound, INT16 *rsound, int *samples)
{
av_codec_decompress_config avconfig;
int interlace_factor = chdinterlaced ? 2 : 1;
bitmap_yuy16 fakebitmap;
UINT32 numsamples;
chd_error chderr;
int fieldnum;
/* loop over fields */
*samples = 0;
for (fieldnum = 0; fieldnum < interlace_factor; fieldnum++)
{
/* make a fake bitmap for this field */
avconfig.video.wrap(&bitmap.pix16(fieldnum), bitmap.width(), bitmap.height() / interlace_factor, bitmap.rowpixels() * interlace_factor);
/* configure the codec */
avconfig.maxsamples = 48000;
avconfig.actsamples = &numsamples;
avconfig.audio[0] = &lsound[*samples];
avconfig.audio[1] = &rsound[*samples];
/* configure the decompressor for this frame */
chd_codec_config((chd_file *)file, AV_CODEC_DECOMPRESS_CONFIG, &avconfig);
/* read the frame */
chderr = chd_read((chd_file *)file, frame * interlace_factor + fieldnum, NULL);
if (chderr != CHDERR_NONE)
return FALSE;
/* account for samples read */
*samples += numsamples;
}
return TRUE;
}
virtual void Read(u32 FAD,u8* dst,SectorFormat* sector_type,u8* subcode,SubcodeFormat* subcode_type)
{
u32 fad_offs=FAD-StartFAD;
u32 hunk=(fad_offs)/disc->sph + StartHunk;
if (disc->old_hunk!=hunk)
{
chd_read(disc->chd,hunk,disc->hunk_mem); //CHDERR_NONE
}
u32 hunk_ofs=fad_offs%disc->sph;
memcpy(dst,disc->hunk_mem+hunk_ofs*(2352+96),2352);
*sector_type=SECFMT_2352;
//While space is reserved for it, the images contain no actual subcodes
//memcpy(subcode,disc->hunk_mem+hunk_ofs*(2352+96)+2352,96);
*subcode_type=SUBFMT_NONE;
}
UINT32 hard_disk_read(hard_disk_file *file, UINT32 lbasector, void *buffer)
{
UINT32 hunknum = lbasector / file->hunksectors;
UINT32 sectoroffs = lbasector % file->hunksectors;
/* if we haven't cached this hunk, read it now */
if (file->cachehunk != hunknum)
{
chd_error err = chd_read(file->chd, hunknum, file->cache);
if (err != CHDERR_NONE)
return 0;
file->cachehunk = hunknum;
}
/* copy out the requested sector */
memcpy(buffer, &file->cache[sectoroffs * file->info.sectorbytes], file->info.sectorbytes);
return 1;
}
UINT32 hard_disk_write(hard_disk_file *file, UINT32 lbasector, const void *buffer)
{
UINT32 hunknum = lbasector / file->hunksectors;
UINT32 sectoroffs = lbasector % file->hunksectors;
chd_error err;
/* if we haven't cached this hunk, read it now */
if (file->cachehunk != hunknum)
{
err = chd_read(file->chd, hunknum, file->cache);
if (err != CHDERR_NONE)
return 0;
file->cachehunk = hunknum;
}
/* copy in the requested data */
memcpy(&file->cache[sectoroffs * file->info.sectorbytes], buffer, file->info.sectorbytes);
/* write it back out */
err = chd_write(file->chd, hunknum, file->cache);
return (err == CHDERR_NONE) ? 1 : 0;
}
