Function swr_set_matrix

pub unsafe extern "C" fn swr_set_matrix(
    s: *mut SwrContext,
    matrix: *const f64,
    stride: i32,
) -> i32

Set a customized remix matrix.

@param s allocated Swr context, not yet initialized @param matrix remix coefficients; matrix[i + stride * o] is the weight of input channel i in output channel o @param stride offset between lines of the matrix @return >= 0 on success, or AVERROR error code in case of failure.