midimeta.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 _SsGetMetaEvent(s16 sep_no, s16 seq_no, u8 meta_event)
{
    libsnd2_sequence_struct_t *score_struct;
    u8 v4;
    u8 v6;
    int v7;
    unsigned int v8;
    int v9;
    int v10;
    unsigned int v11;
 
    (void)meta_event;
 
    score_struct = &_ss_score[sep_no][seq_no];
    v4 = *(score_struct->m_seq_ptr);
    score_struct->m_seq_ptr += 1;
    v6 = *(score_struct->m_seq_ptr);
    score_struct->m_seq_ptr += 1;
    v7 = 60000000 / ((v4 << 16) | (v6 << 8) | *(score_struct->m_seq_ptr));
    score_struct->m_seq_ptr += 1;
    v8 = score_struct->m_resolution_of_quarter_note * v7;
    v9 = VBLANK_MINUS;
    v10 = 16 * VBLANK_MINUS;
    score_struct->m_unk94 = v7;
    v11 = 4 * (v10 - v9);
    if ( 10 * v8 < v11 )
    {
        unsigned int v13;
 
        if ( !v8 )
            __builtin_trap();
        v13 = 600 * v9 / v8;
        score_struct->m_unk52 = v13;
        score_struct->m_unk54 = v13;
    }
    else
    {
        unsigned int v15;
        unsigned int v16;
 
        v15 = 10 * score_struct->m_resolution_of_quarter_note * score_struct->m_unk94 / v11;
        v16 = 10 * score_struct->m_resolution_of_quarter_note * score_struct->m_unk94 % v11;
        score_struct->m_unk52 = -1;
        score_struct->m_unk54 = v15;
        if ( (unsigned int)(2 * (v10 - v9)) < v16 )
        {
            score_struct->m_unk54 = v15 + 1;
        }
    }
    score_struct->m_delta_value = _SsReadDeltaValue(sep_no, seq_no);
}