sstempo.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 SsSetTempo(s16 sep_no, s16 seq_no, s16 tempo)
{
    libsnd2_sequence_struct_t *score_struct;
    unsigned int v4;
    int v5;
    int v6;
    unsigned int v7;
 
    score_struct = &_ss_score[sep_no][seq_no];
    v4 = score_struct->m_resolution_of_quarter_note * tempo;
    v5 = VBLANK_MINUS;
    v6 = 15 * VBLANK_MINUS;
    score_struct->m_unk94 = tempo;
    v7 = 4 * v6;
    if ( 10 * v4 < (unsigned int)(4 * v6) )
    {
        unsigned int v9;
 
        if ( !v4 )
            __builtin_trap();
        v9 = 600 * v5 / v4;
        score_struct->m_unk52 = v9;
        score_struct->m_unk54 = v9;
    }
    else
    {
        unsigned int v11;
        unsigned int v12;
 
        v11 = 10 * score_struct->m_resolution_of_quarter_note * score_struct->m_unk94 / v7;
        v12 = 10 * score_struct->m_resolution_of_quarter_note * score_struct->m_unk94 % v7;
        score_struct->m_unk52 = -1;
        score_struct->m_unk54 = v11;
        if ( (unsigned int)(2 * v6) < v12 )
        {
            score_struct->m_unk54 = v11 + 1;
        }
    }
    score_struct->m_unk56 = score_struct->m_unk54;
}