Struct AVDCT

#[repr(C)]
pub struct AVDCT {
    pub av_class: *const AVClass,
    pub idct: Option<unsafe extern "C" fn(*mut i16)>,
    pub idct_permutation: [u8; 64],
    pub fdct: Option<unsafe extern "C" fn(*mut i16)>,
    pub dct_algo: i32,
    pub idct_algo: i32,
    pub get_pixels: Option<unsafe extern "C" fn(*mut i16, *const u8, isize)>,
    pub bits_per_sample: i32,
    pub get_pixels_unaligned: Option<unsafe extern "C" fn(*mut i16, *const u8, isize)>,
}

AVDCT context. @note function pointers can be NULL if the specific features have been disabled at build time.

Fields

av_class: *const AVClass

idct: Option<unsafe extern "C" fn(*mut i16)>

idct_permutation: [u8; 64]

IDCT input permutation. Several optimized IDCTs need a permutated input (relative to the normal order of the reference IDCT). This permutation must be performed before the idct_put/add. Note, normally this can be merged with the zigzag/alternate scan
An example to avoid confusion:

• (->decode coeffs -> zigzag reorder -> dequant -> reference IDCT -> …)
• (x -> reference DCT -> reference IDCT -> x)
• (x -> reference DCT -> simple_mmx_perm = idct_permutation -> simple_idct_mmx -> x)
• (-> decode coeffs -> zigzag reorder -> simple_mmx_perm -> dequant -> simple_idct_mmx -> …)

fdct: Option<unsafe extern "C" fn(*mut i16)>

dct_algo: i32

DCT algorithm. must use AVOptions to set this field.

idct_algo: i32

IDCT algorithm. must use AVOptions to set this field.

get_pixels: Option<unsafe extern "C" fn(*mut i16, *const u8, isize)>

bits_per_sample: i32

get_pixels_unaligned: Option<unsafe extern "C" fn(*mut i16, *const u8, isize)>

Trait Implementations

impl Clone for AVDCT

fn clone(&self) -> AVDCT

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for AVDCT

fn fmt(&self, f: &mut Formatter<'_>) -> Result<(), Error>

Formats the value using the given formatter.

impl Copy for AVDCT