RaySollium99/picodrive
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buffering, PCM DMA, memcpy12bswap

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git-svn-id: file:///home/notaz/opt/svn/PicoDrive@66 be3aeb3a-fb24-0410-a615-afba39da0efa
This commit is contained in:
notaz 2007-03-11 23:46:27 +00:00
parent 83bd0b76ab
commit 0a051f558c
15 changed files with 395 additions and 70 deletions
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28
Pico/cd/cd_file.c
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@ -141,24 +141,17 @@ void Unload_ISO(void)
}
void PicoCDBufferRead(void *dest, int lba);
int FILE_Read_One_LBA_CDC(void)
{
int where_read = 0;
// static char cp_buf[2560];
if (Pico_mcd->s68k_regs[0x36] & 1) // DATA
{
if (Pico_mcd->TOC.Tracks[0].F == NULL) return -1;
if (Pico_mcd->scd.Cur_LBA < 0)
where_read = 0;
else if (Pico_mcd->scd.Cur_LBA >= Pico_mcd->TOC.Tracks[0].Length)
where_read = Pico_mcd->TOC.Tracks[0].Length - 1;
else where_read = Pico_mcd->scd.Cur_LBA;
if (Pico_mcd->TOC.Tracks[0].ftype == TYPE_ISO) where_read <<= 11;
else where_read = (where_read * 2352 + 16);
// moved below..
//fseek(Pico_mcd->TOC.Tracks[0].F, where_read, SEEK_SET);
//fread(cp_buf, 1, 2048, Pico_mcd->TOC.Tracks[0].F);
@ -169,7 +162,7 @@ int FILE_Read_One_LBA_CDC(void)
{
// int rate, channel;
if (Pico_mcd->TOC.Tracks[Pico_mcd->scd.Cur_Track - 1].ftype == TYPE_MP3)
// if (Pico_mcd->TOC.Tracks[Pico_mcd->scd.Cur_Track - 1].ftype == TYPE_MP3)
{
// TODO
// MP3_Update(cp_buf, &rate, &channel, 0);
@ -189,8 +182,16 @@ int FILE_Read_One_LBA_CDC(void)
{
if (Pico_mcd->cdc.CTRL.B.B0 & 0x04) // WRRQ : this bit enable write to buffer
{
int where_read = 0;
// CAUTION : lookahead bit not implemented
if (Pico_mcd->scd.Cur_LBA < 0)
where_read = 0;
else if (Pico_mcd->scd.Cur_LBA >= Pico_mcd->TOC.Tracks[0].Length)
where_read = Pico_mcd->TOC.Tracks[0].Length - 1;
else where_read = Pico_mcd->scd.Cur_LBA;
Pico_mcd->scd.Cur_LBA++;
Pico_mcd->cdc.WA.N = (Pico_mcd->cdc.WA.N + 2352) & 0x7FFF; // add one sector to WA
@ -199,8 +200,9 @@ int FILE_Read_One_LBA_CDC(void)
*(unsigned int *)(Pico_mcd->cdc.Buffer + Pico_mcd->cdc.PT.N) = Pico_mcd->cdc.HEAD.N;
//memcpy(&Pico_mcd->cdc.Buffer[Pico_mcd->cdc.PT.N + 4], cp_buf, 2048);
pm_seek(Pico_mcd->TOC.Tracks[0].F, where_read, SEEK_SET);
pm_read(Pico_mcd->cdc.Buffer + Pico_mcd->cdc.PT.N + 4, 2048, Pico_mcd->TOC.Tracks[0].F);
//pm_seek(Pico_mcd->TOC.Tracks[0].F, where_read, SEEK_SET);
//pm_read(Pico_mcd->cdc.Buffer + Pico_mcd->cdc.PT.N + 4, 2048, Pico_mcd->TOC.Tracks[0].F);
PicoCDBufferRead(Pico_mcd->cdc.Buffer + Pico_mcd->cdc.PT.N + 4, where_read);
#ifdef DEBUG_CD
cdprintf("Read -> WA = %d Buffer[%d] =", Pico_mcd->cdc.WA.N, Pico_mcd->cdc.PT.N & 0x3FFF);