vs_vtbp.c

/*
# _____     ___ ____     ___ ____
#  ____|   |    ____|   |        | |____|
# |     ___|   |____ ___|    ____| |    \    PS2DEV Open Source Project.
#-----------------------------------------------------------------------
# Copyright ps2dev - http://www.ps2dev.org
# Licenced under Academic Free License version 2.0
# Review ps2sdk README & LICENSE files for further details.
*/
 
#include "libsnd2_internal.h"
 
static s16 vabid_old_2 = -1;
 
s16 SsVabTransBodyPartly(u8 *addr, unsigned int bufsize, s16 vab_id)
{
    unsigned int bufsize_tmp;
    int new_vabid;
 
    if ( (u16)vab_id >= 0x11u || _svm_vab_used[vab_id] != 2 )
    {
        _spu_setInTransfer(0);
        return -1;
    }
    if ( !_svm_vab_not_send_size )
    {
        vabid_old_2 = vab_id;
        _svm_vab_not_send_size = _svm_vab_total[vab_id];
        SpuSetTransferMode(SPU_TRANSFER_BY_DMA);
        if ( !SpuSetTransferStartAddr(_svm_vab_start[vab_id]) )
        {
            _svm_vab_not_send_size = 0;
            vabid_old_2 = -1;
            _spu_setInTransfer(0);
            return -1;
        }
    }
    new_vabid = vabid_old_2;
    if ( vabid_old_2 != vab_id )
    {
        _spu_setInTransfer(0);
        return -1;
    }
    bufsize_tmp = bufsize;
    if ( (unsigned int)_svm_vab_not_send_size < bufsize )
        bufsize_tmp = _svm_vab_not_send_size;
    _spu_setInTransfer(1);
    SpuWritePartly(addr, bufsize_tmp);
    _svm_vab_not_send_size -= bufsize_tmp;
    if ( _svm_vab_not_send_size != 0 )
    {
        return -2;
    }
    vabid_old_2 = -1;
    _svm_vab_not_send_size = 0;
    _svm_vab_used[new_vabid] = 1;
    return new_vabid;
}