vm_spb.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 SePitchBend(u8 vc, s16 arg1)
{
    char v8;
    int tone;
    int note;
    int pbend;
    const libsnd2_spu_voice_t *voice_struct;
 
    if ( vc >= 0x18 )
    {
        return;
    }
    voice_struct = &_svm_voice[vc];
    _svm_cur.m_fake_program = voice_struct->m_fake_program;
    v8 = voice_struct->m_tone;
    _svm_cur.m_voice_idx = vc;
    _svm_cur.m_tone = v8;
    tone = v8 + ((u8)_svm_cur.m_fake_program * 16);
    if ( arg1 < 0 )
    {
        int v13;
 
        v13 = arg1 * _svm_tn[tone].pbmin;
        pbend = v13 / 127 + 127;
        note = voice_struct->m_note + v13 / 127 - 1;
    }
    else
    {
        int v10;
 
        v10 = arg1 * _svm_tn[tone].pbmax;
        note = voice_struct->m_note + v10 / 127;
        pbend = v10 % 127;
    }
    _svm_sreg_buf[vc].m_pitch = note2pitch2(note, pbend);
    _svm_sreg_dirty[vc] |= 4;
}