vm_nowon.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"
 
void _SsVmKeyOnNow(s16 vag_count, s16 pitch)
{
    u16 m_voice_idx;
    unsigned int left;
    libsnd2_sequence_struct_t *score_struct;
    unsigned int left_tmp2;
    unsigned int right_tmp;
    unsigned int left_tmp;
    int bits_lower;
    int bits_upper;
    libsnd2_spu_voice_t *voice_struct;
 
    (void)vag_count;
 
    m_voice_idx = _svm_cur.m_voice_idx;
    left = _svm_cur.m_voll * 0x3FFF * _svm_vh->mvol / 0x3F01 * _svm_cur.m_mvol * _svm_cur.m_vol / 0x3F01u;
    left_tmp2 = left;
    score_struct = NULL;
    if ( _svm_cur.m_seq_sep_no != 33 )
    {
        score_struct = &_ss_score[(_svm_cur.m_seq_sep_no & 0xFF)][(_svm_cur.m_seq_sep_no & 0xFF00) >> 8];
    }
    if ( score_struct != NULL )
    {
        left_tmp2 = left * (u16)score_struct->m_voll / 0x7F;
        left = left * (u16)score_struct->m_volr / 0x7F;
    }
    if ( (u8)_svm_cur.m_pan >= 0x40u )
    {
        left_tmp = left;
        right_tmp = left_tmp2 * (127 - (u8)_svm_cur.m_pan) / 0x3F;
    }
    else
    {
        right_tmp = left_tmp2;
        left_tmp = left * (u8)_svm_cur.m_pan / 0x3F;
    }
    if ( (u8)_svm_cur.m_mpan >= 0x40u )
        right_tmp = right_tmp * (127 - (u8)_svm_cur.m_mpan) / 0x3F;
    else
        left_tmp = left_tmp * (u8)_svm_cur.m_mpan / 0x3F;
    if ( (u8)_svm_cur.m_unk05 >= 0x40u )
        right_tmp = right_tmp * (127 - (u8)_svm_cur.m_unk05) / 0x3F;
    else
        left_tmp = left_tmp * (u8)_svm_cur.m_unk05 / 0x3F;
    if ( _svm_stereo_mono == 1 )
    {
        if ( right_tmp >= left_tmp )
            left_tmp = right_tmp;
        else
            right_tmp = left_tmp;
    }
    if ( score_struct != NULL )
    {
        right_tmp = right_tmp * right_tmp / 0x3FFF;
        left_tmp = left_tmp * left_tmp / 0x3FFF;
    }
    _svm_sreg_buf[m_voice_idx].m_pitch = pitch;
    _svm_sreg_buf[m_voice_idx].m_vol_left = right_tmp;
    _svm_sreg_buf[m_voice_idx].m_vol_right = left_tmp;
    _svm_sreg_dirty[_svm_cur.m_voice_idx] |= 7u;
    voice_struct = &_svm_voice[_svm_cur.m_voice_idx];
    voice_struct->m_pitch = pitch;
    if ( _svm_cur.m_voice_idx >= 16 )
    {
        bits_lower = 0;
        bits_upper = 1 << ((_svm_cur.m_voice_idx & 0xFF) - 16);
    }
    else
    {
        bits_lower = 1 << (_svm_cur.m_voice_idx & 0xFF);
        bits_upper = 0;
    }
    if ( (_svm_cur.m_mode & 4) != 0 )
    {
        _svm_orev1 |= bits_lower;
        _svm_orev2 |= bits_upper;
    }
    else
    {
        _svm_orev1 &= ~(u16)bits_lower;
        _svm_orev2 &= ~(u16)bits_upper;
    }
    _svm_onos1 &= ~(u16)bits_lower;
    _svm_okon2 |= bits_upper;
    _svm_onos2 &= ~(u16)bits_upper;
    _svm_okon1 |= bits_lower;
    _svm_okof1 &= ~_svm_okon1;
    _svm_okof2 &= ~_svm_okon2;
}