unsafe-libopus 0.2.0

libopus transpiled to rust by c2rust
Documentation 
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use crate::silk::lin2log::silk_lin2log;

pub mod typedef_h {
    pub const silk_int32_MAX: i32 = i32::MAX;
}
pub use self::typedef_h::silk_int32_MAX;
use crate::silk::define::LTP_ORDER;

pub unsafe fn silk_VQ_WMat_EC_c(
    ind: *mut i8,
    res_nrg_Q15: *mut i32,
    rate_dist_Q8: *mut i32,
    gain_Q7: *mut i32,
    XX_Q17: *const i32,
    xX_Q17: *const i32,
    cb_Q7: *const i8,
    cb_gain_Q7: *const u8,
    cl_Q5: *const u8,
    subfr_len: i32,
    max_gain_Q7: i32,
    L: i32,
) {
    let mut k: i32 = 0;
    let mut gain_tmp_Q7: i32 = 0;
    let mut cb_row_Q7: *const i8 = 0 as *const i8;
    let mut neg_xX_Q24: [i32; 5] = [0; 5];
    let mut sum1_Q15: i32 = 0;
    let mut sum2_Q24: i32 = 0;
    let mut bits_res_Q8: i32 = 0;
    let mut bits_tot_Q8: i32 = 0;
    neg_xX_Q24[0 as usize] = -(((*xX_Q17.offset(0 as isize) as u32) << 7) as i32);
    neg_xX_Q24[1 as usize] = -(((*xX_Q17.offset(1 as isize) as u32) << 7) as i32);
    neg_xX_Q24[2 as usize] = -(((*xX_Q17.offset(2 as isize) as u32) << 7) as i32);
    neg_xX_Q24[3 as usize] = -(((*xX_Q17.offset(3 as isize) as u32) << 7) as i32);
    neg_xX_Q24[4 as usize] = -(((*xX_Q17.offset(4 as isize) as u32) << 7) as i32);
    *rate_dist_Q8 = silk_int32_MAX;
    *res_nrg_Q15 = silk_int32_MAX;
    cb_row_Q7 = cb_Q7;
    *ind = 0;
    k = 0;
    while k < L {
        let mut penalty: i32 = 0;
        gain_tmp_Q7 = *cb_gain_Q7.offset(k as isize) as i32;
        sum1_Q15 = (1.001f64 * ((1) << 15) as f64 + 0.5f64) as i32;
        penalty = (((if gain_tmp_Q7 - max_gain_Q7 > 0 {
            gain_tmp_Q7 - max_gain_Q7
        } else {
            0
        }) as u32)
            << 11) as i32;
        sum2_Q24 = neg_xX_Q24[0 as usize]
            + *XX_Q17.offset(1 as isize) * *cb_row_Q7.offset(1 as isize) as i32;
        sum2_Q24 = sum2_Q24 + *XX_Q17.offset(2 as isize) * *cb_row_Q7.offset(2 as isize) as i32;
        sum2_Q24 = sum2_Q24 + *XX_Q17.offset(3 as isize) * *cb_row_Q7.offset(3 as isize) as i32;
        sum2_Q24 = sum2_Q24 + *XX_Q17.offset(4 as isize) * *cb_row_Q7.offset(4 as isize) as i32;
        sum2_Q24 = ((sum2_Q24 as u32) << 1) as i32;
        sum2_Q24 = sum2_Q24 + *XX_Q17.offset(0 as isize) * *cb_row_Q7.offset(0 as isize) as i32;
        sum1_Q15 = (sum1_Q15 as i64
            + (sum2_Q24 as i64 * *cb_row_Q7.offset(0 as isize) as i16 as i64 >> 16))
            as i32;
        sum2_Q24 = neg_xX_Q24[1 as usize]
            + *XX_Q17.offset(7 as isize) * *cb_row_Q7.offset(2 as isize) as i32;
        sum2_Q24 = sum2_Q24 + *XX_Q17.offset(8 as isize) * *cb_row_Q7.offset(3 as isize) as i32;
        sum2_Q24 = sum2_Q24 + *XX_Q17.offset(9 as isize) * *cb_row_Q7.offset(4 as isize) as i32;
        sum2_Q24 = ((sum2_Q24 as u32) << 1) as i32;
        sum2_Q24 = sum2_Q24 + *XX_Q17.offset(6 as isize) * *cb_row_Q7.offset(1 as isize) as i32;
        sum1_Q15 = (sum1_Q15 as i64
            + (sum2_Q24 as i64 * *cb_row_Q7.offset(1 as isize) as i16 as i64 >> 16))
            as i32;
        sum2_Q24 = neg_xX_Q24[2 as usize]
            + *XX_Q17.offset(13 as isize) * *cb_row_Q7.offset(3 as isize) as i32;
        sum2_Q24 = sum2_Q24 + *XX_Q17.offset(14 as isize) * *cb_row_Q7.offset(4 as isize) as i32;
        sum2_Q24 = ((sum2_Q24 as u32) << 1) as i32;
        sum2_Q24 = sum2_Q24 + *XX_Q17.offset(12 as isize) * *cb_row_Q7.offset(2 as isize) as i32;
        sum1_Q15 = (sum1_Q15 as i64
            + (sum2_Q24 as i64 * *cb_row_Q7.offset(2 as isize) as i16 as i64 >> 16))
            as i32;
        sum2_Q24 = neg_xX_Q24[3 as usize]
            + *XX_Q17.offset(19 as isize) * *cb_row_Q7.offset(4 as isize) as i32;
        sum2_Q24 = ((sum2_Q24 as u32) << 1) as i32;
        sum2_Q24 = sum2_Q24 + *XX_Q17.offset(18 as isize) * *cb_row_Q7.offset(3 as isize) as i32;
        sum1_Q15 = (sum1_Q15 as i64
            + (sum2_Q24 as i64 * *cb_row_Q7.offset(3 as isize) as i16 as i64 >> 16))
            as i32;
        sum2_Q24 = ((neg_xX_Q24[4 as usize] as u32) << 1) as i32;
        sum2_Q24 = sum2_Q24 + *XX_Q17.offset(24 as isize) * *cb_row_Q7.offset(4 as isize) as i32;
        sum1_Q15 = (sum1_Q15 as i64
            + (sum2_Q24 as i64 * *cb_row_Q7.offset(4 as isize) as i16 as i64 >> 16))
            as i32;
        if sum1_Q15 >= 0 {
            bits_res_Q8 = subfr_len as i16 as i32
                * (silk_lin2log(sum1_Q15 + penalty) - ((15) << 7)) as i16 as i32;
            bits_tot_Q8 = bits_res_Q8 + ((*cl_Q5.offset(k as isize) as u32) << 3 - 1) as i32;
            if bits_tot_Q8 <= *rate_dist_Q8 {
                *rate_dist_Q8 = bits_tot_Q8;
                *res_nrg_Q15 = sum1_Q15 + penalty;
                *ind = k as i8;
                *gain_Q7 = gain_tmp_Q7;
            }
        }
        cb_row_Q7 = cb_row_Q7.offset(LTP_ORDER as isize);
        k += 1;
    }
}