use crate::Result;
use jxl_bitstream::{define_bundle, read_bits, Bitstream, Bundle, Name};
use jxl_image::{BitDepth, Extensions, ImageHeader, SizeHeader};
define_bundle! {
#[derive(Debug)]
pub struct FrameHeader ctx(headers: &ImageHeader) error(crate::Error) {
all_default: ty(Bool) default(true),
pub frame_type: ty(Bundle(FrameType)) cond(!all_default) default(FrameType::RegularFrame),
pub encoding: ty(Bundle(Encoding)) cond(!all_default) default(Encoding::VarDct),
pub flags: ty(Bundle(FrameFlags)) cond(!all_default),
pub do_ycbcr: ty(Bool) cond(!all_default && !headers.metadata.xyb_encoded),
encoded_color_channels:
ty(u(0))
cond(false)
default({
let acutally_grayscale = encoding == Encoding::Modular
&& !do_ycbcr
&& !headers.metadata.xyb_encoded
&& headers.metadata.grayscale();
if acutally_grayscale { 1 } else { 3 }
}),
pub jpeg_upsampling: ty(Array[u(2)]; 3) cond(do_ycbcr && !flags.use_lf_frame()),
pub upsampling: ty(U32(1, 2, 4, 8)) cond(!all_default && !flags.use_lf_frame()) default(1),
pub ec_upsampling:
ty(Vec[U32(1, 2, 4, 8)]; headers.metadata.ec_info.len())
cond(!all_default && !flags.use_lf_frame())
default(vec![1; headers.metadata.ec_info.len()]),
pub group_size_shift: ty(u(2)) cond(encoding == Encoding::Modular) default(1),
pub x_qm_scale:
ty(u(3))
cond(!all_default && headers.metadata.xyb_encoded && encoding == Encoding::VarDct)
default(Self::compute_default_xqms(encoding, headers.metadata.xyb_encoded)),
pub b_qm_scale:
ty(u(3))
cond(!all_default && headers.metadata.xyb_encoded && encoding == Encoding::VarDct)
default(2),
pub passes:
ty(Bundle(Passes))
cond(!all_default && frame_type != FrameType::ReferenceOnly),
pub lf_level: ty(1 + u(2)) cond(frame_type == FrameType::LfFrame) default(0),
pub have_crop: ty(Bool) cond(!all_default && frame_type != FrameType::LfFrame) default(false),
pub x0:
ty(U32(u(8), 256 + u(11), 2304 + u(14), 18688 + u(30)); UnpackSigned)
cond(have_crop && frame_type != FrameType::ReferenceOnly),
pub y0:
ty(U32(u(8), 256 + u(11), 2304 + u(14), 18688 + u(30)); UnpackSigned)
cond(have_crop && frame_type != FrameType::ReferenceOnly),
pub width:
ty(U32(u(8), 256 + u(11), 2304 + u(14), 18688 + u(30)))
cond(have_crop)
default(headers.size.width),
pub height:
ty(U32(u(8), 256 + u(11), 2304 + u(14), 18688 + u(30)))
cond(have_crop)
default(headers.size.height),
pub blending_info:
ty(Bundle(BlendingInfo))
ctx((
!headers.metadata.ec_info.is_empty(),
None,
CanvasSizeParams {
have_crop,
x0,
y0,
width,
height,
size: &headers.size,
},
))
cond(!all_default && frame_type.is_normal_frame()),
pub ec_blending_info:
ty(Vec[Bundle(BlendingInfo)]; headers.metadata.ec_info.len())
ctx((
!headers.metadata.ec_info.is_empty(),
Some(blending_info.mode),
CanvasSizeParams {
have_crop,
x0,
y0,
width,
height,
size: &headers.size,
},
))
cond(!all_default && frame_type.is_normal_frame()),
pub duration:
ty(U32(0, 1, u(8), u(32)))
cond(!all_default && frame_type.is_normal_frame() && headers.metadata.animation.is_some())
default(0),
pub timecode:
ty(u(32))
cond(!all_default && frame_type.is_normal_frame() && headers.metadata.animation.as_ref().map(|a| a.have_timecodes).unwrap_or(false))
default(0),
pub is_last:
ty(Bool)
cond(!all_default && frame_type.is_normal_frame())
default(frame_type == FrameType::RegularFrame),
pub save_as_reference:
ty(u(2))
cond(!all_default && frame_type != FrameType::LfFrame && !is_last)
default(0),
pub resets_canvas:
ty(Bool)
cond(false)
default(Self::resets_canvas(
blending_info.mode,
CanvasSizeParams {
have_crop,
x0,
y0,
width,
height,
size: &headers.size,
},
)),
pub save_before_ct:
ty(Bool)
cond(
!all_default && (
frame_type == FrameType::ReferenceOnly || (
resets_canvas &&
(!is_last && (duration == 0 || save_as_reference != 0) && frame_type != FrameType::LfFrame)
)
)
)
default(!frame_type.is_normal_frame()),
pub name: ty(Bundle(Name)) cond(!all_default),
pub restoration_filter: ty(Bundle(RestorationFilter)) ctx(encoding) cond(!all_default),
pub extensions: ty(Bundle(Extensions)) cond(!all_default),
pub bit_depth: ty(Bundle(BitDepth)) cond(false) default(headers.metadata.bit_depth),
}
#[derive(Debug)]
pub struct Passes error(crate::Error) {
pub num_passes: ty(U32(1, 2, 3, 4 + u(3))) default(1),
pub num_ds: ty(U32(0, 1, 2, 3 + u(1))) cond(num_passes != 1) default(0),
pub shift: ty(Vec[u(2)]; num_passes - 1) cond(num_passes != 1) default(vec![0; num_passes as usize - 1]),
pub downsample: ty(Vec[U32(1, 2, 4, 8)]; num_ds) cond(num_passes != 1) default(vec![1; num_ds as usize]),
pub last_pass: ty(Vec[U32(0, 1, 2, u(3))]; num_ds) cond(num_passes != 1) default(vec![0; num_ds as usize]),
}
#[derive(Debug)]
pub struct BlendingInfo ctx(context: (bool, Option<BlendMode>, CanvasSizeParams<'_>)) error(crate::Error) {
pub mode: ty(Bundle(BlendMode)),
pub alpha_channel:
ty(U32(0, 1, 2, 3 + u(3)))
cond(context.0 && (mode == BlendMode::Blend || mode == BlendMode::MulAdd))
default(0),
pub clamp:
ty(Bool)
cond((context.0 && (mode == BlendMode::Blend || mode == BlendMode::MulAdd)) || mode == BlendMode::Mul)
default(false),
pub source:
ty(u(2))
cond(!FrameHeader::resets_canvas(context.1.unwrap_or(mode), context.2))
default(0),
}
#[derive(Debug)]
pub struct RestorationFilter ctx(encoding: Encoding) error(crate::Error) {
all_default: ty(Bool) default(true),
pub gab: ty(Bundle(crate::filter::Gabor)) cond(!all_default),
pub epf: ty(Bundle(crate::filter::EdgePreservingFilter)) cond(!all_default),
pub extensions: ty(Bundle(Extensions)) cond(!all_default),
}
}
#[derive(Copy, Clone)]
struct CanvasSizeParams<'a> {
have_crop: bool,
x0: i32,
y0: i32,
width: u32,
height: u32,
size: &'a SizeHeader,
}
impl FrameHeader {
fn test_full_image(canvas_size: CanvasSizeParams) -> bool {
let CanvasSizeParams {
x0,
y0,
width,
height,
size,
..
} = canvas_size;
if x0 > 0 || y0 > 0 {
return false;
}
let right = x0 as i64 + (width as i64);
let bottom = y0 as i64 + (height as i64);
(right >= size.width as i64) && (bottom >= size.height as i64)
}
fn resets_canvas(blending_mode: BlendMode, canvas_size: CanvasSizeParams) -> bool {
blending_mode == BlendMode::Replace
&& (!canvas_size.have_crop || Self::test_full_image(canvas_size))
}
fn compute_default_xqms(encoding: Encoding, xyb_encoded: bool) -> u32 {
if xyb_encoded && encoding == Encoding::VarDct {
3
} else {
2
}
}
#[inline]
pub fn is_keyframe(&self) -> bool {
self.frame_type.is_normal_frame() && (self.is_last || self.duration != 0)
}
#[inline]
pub fn can_reference(&self) -> bool {
!self.is_last
&& (self.duration == 0 || self.save_as_reference != 0)
&& self.frame_type != FrameType::LfFrame
}
pub fn sample_width(&self, upsampling: u32) -> u32 {
let &Self {
mut width,
lf_level,
..
} = self;
if upsampling > 1 {
width = (width + upsampling - 1) / upsampling;
}
if lf_level > 0 {
let div = 1u32 << (3 * lf_level);
width = (width + div - 1) / div;
}
width
}
pub fn sample_height(&self, upsampling: u32) -> u32 {
let &Self {
mut height,
lf_level,
..
} = self;
if upsampling > 1 {
height = (height + upsampling - 1) / upsampling;
}
if lf_level > 0 {
let div = 1u32 << (3 * lf_level);
height = (height + div - 1) / div;
}
height
}
pub fn color_sample_width(&self) -> u32 {
self.sample_width(self.upsampling)
}
pub fn color_sample_height(&self) -> u32 {
self.sample_height(self.upsampling)
}
#[inline]
pub fn encoded_color_channels(&self) -> usize {
self.encoded_color_channels as usize
}
pub fn num_groups(&self) -> u32 {
let width = self.color_sample_width();
let height = self.color_sample_height();
let group_dim = self.group_dim();
let hgroups = (width + group_dim - 1) / group_dim;
let vgroups = (height + group_dim - 1) / group_dim;
hgroups * vgroups
}
pub fn num_lf_groups(&self) -> u32 {
let width = self.color_sample_width();
let height = self.color_sample_height();
let lf_group_dim = self.lf_group_dim();
let hgroups = (width + lf_group_dim - 1) / lf_group_dim;
let vgroups = (height + lf_group_dim - 1) / lf_group_dim;
hgroups * vgroups
}
pub fn group_dim(&self) -> u32 {
128 << self.group_size_shift
}
pub fn groups_per_row(&self) -> u32 {
let group_dim = self.group_dim();
(self.color_sample_width() + group_dim - 1) / group_dim
}
pub fn lf_group_dim(&self) -> u32 {
self.group_dim() * 8
}
pub fn lf_groups_per_row(&self) -> u32 {
let lf_group_dim = self.lf_group_dim();
(self.color_sample_width() + lf_group_dim - 1) / lf_group_dim
}
pub fn group_size_for(&self, group_idx: u32) -> (u32, u32) {
self.size_for(self.group_dim(), group_idx)
}
pub fn lf_group_size_for(&self, lf_group_idx: u32) -> (u32, u32) {
self.size_for(self.lf_group_dim(), lf_group_idx)
}
fn size_for(&self, group_dim: u32, group_idx: u32) -> (u32, u32) {
let width = self.color_sample_width();
let height = self.color_sample_height();
let full_rows = height / group_dim;
let rows_remainder = height % group_dim;
let full_cols = width / group_dim;
let cols_remainder = width % group_dim;
let stride = full_cols + (cols_remainder > 0) as u32;
let row = group_idx / stride;
let col = group_idx % stride;
let group_width = if col >= full_cols {
cols_remainder
} else {
group_dim
};
let group_height = if row >= full_rows {
rows_remainder
} else {
group_dim
};
(group_width, group_height)
}
pub fn lf_group_idx_from_group_idx(&self, group_idx: u32) -> u32 {
let groups_per_row = self.groups_per_row();
let lf_group_col = (group_idx % groups_per_row) / 8;
let lf_group_row = (group_idx / groups_per_row) / 8;
lf_group_col + lf_group_row * self.lf_groups_per_row()
}
pub fn is_group_collides_region(&self, group_idx: u32, region: (u32, u32, u32, u32)) -> bool {
let group_dim = self.group_dim();
let group_per_row = self.groups_per_row();
let group_left = (group_idx % group_per_row) * group_dim;
let group_top = (group_idx / group_per_row) * group_dim;
is_aabb_collides(region, (group_left, group_top, group_dim, group_dim))
}
pub fn is_lf_group_collides_region(
&self,
lf_group_idx: u32,
region: (u32, u32, u32, u32),
) -> bool {
let lf_group_dim = self.lf_group_dim();
let lf_group_per_row = self.lf_groups_per_row();
let group_left = (lf_group_idx % lf_group_per_row) * lf_group_dim;
let group_top = (lf_group_idx / lf_group_per_row) * lf_group_dim;
is_aabb_collides(region, (group_left, group_top, lf_group_dim, lf_group_dim))
}
}
#[derive(Debug, Default, PartialEq, Eq, Copy, Clone)]
#[repr(u8)]
pub enum FrameType {
#[default]
RegularFrame = 0,
LfFrame,
ReferenceOnly,
SkipProgressive,
}
impl FrameType {
pub fn is_normal_frame(&self) -> bool {
matches!(self, Self::RegularFrame | Self::SkipProgressive)
}
pub fn is_progressive_frame(&self) -> bool {
matches!(self, Self::RegularFrame | Self::LfFrame)
}
}
impl<Ctx> Bundle<Ctx> for FrameType {
type Error = crate::Error;
fn parse(bitstream: &mut Bitstream, _ctx: Ctx) -> Result<Self> {
Ok(match bitstream.read_bits(2)? {
0 => Self::RegularFrame,
1 => Self::LfFrame,
2 => Self::ReferenceOnly,
3 => Self::SkipProgressive,
_ => unreachable!(),
})
}
}
#[derive(Debug, Default, PartialEq, Eq, Copy, Clone)]
#[repr(u8)]
pub enum Encoding {
#[default]
VarDct = 0,
Modular,
}
impl<Ctx> Bundle<Ctx> for Encoding {
type Error = crate::Error;
fn parse(bitstream: &mut Bitstream, _ctx: Ctx) -> Result<Self> {
Ok(match bitstream.read_bits(1)? {
0 => Self::VarDct,
1 => Self::Modular,
_ => unreachable!(),
})
}
}
#[derive(Debug, Default, PartialEq, Eq, Copy, Clone)]
pub struct FrameFlags(u64);
impl FrameFlags {
const NOISE: u64 = 0x1;
const PATCHES: u64 = 0x2;
const SPLINES: u64 = 0x10;
const USE_LF_FRAME: u64 = 0x20;
const SKIP_ADAPTIVE_LF_SMOOTHING: u64 = 0x80;
pub fn noise(&self) -> bool {
self.0 & Self::NOISE != 0
}
pub fn patches(&self) -> bool {
self.0 & Self::PATCHES != 0
}
pub fn splines(&self) -> bool {
self.0 & Self::SPLINES != 0
}
pub fn use_lf_frame(&self) -> bool {
self.0 & Self::USE_LF_FRAME != 0
}
pub fn skip_adaptive_lf_smoothing(&self) -> bool {
self.0 & Self::SKIP_ADAPTIVE_LF_SMOOTHING != 0
}
}
impl<Ctx> Bundle<Ctx> for FrameFlags {
type Error = crate::Error;
fn parse(bitstream: &mut Bitstream, _ctx: Ctx) -> Result<Self> {
Ok(Self(bitstream.read_u64()?))
}
}
#[derive(Debug, Default, PartialEq, Eq, Copy, Clone)]
#[repr(u8)]
pub enum BlendMode {
#[default]
Replace = 0,
Add = 1,
Blend = 2,
MulAdd = 3,
Mul = 4,
}
impl<Ctx> Bundle<Ctx> for BlendMode {
type Error = crate::Error;
fn parse(bitstream: &mut Bitstream, _ctx: Ctx) -> Result<Self> {
Ok(match read_bits!(bitstream, U32(0, 1, 2, 3 + u(2)))? {
0 => Self::Replace,
1 => Self::Add,
2 => Self::Blend,
3 => Self::MulAdd,
4 => Self::Mul,
value => {
return Err(jxl_bitstream::Error::InvalidEnum {
name: "BlendMode",
value,
}
.into())
}
})
}
}
impl BlendMode {
#[inline]
pub fn use_alpha(self) -> bool {
matches!(self, Self::Blend | Self::MulAdd)
}
}
fn is_aabb_collides(rect0: (u32, u32, u32, u32), rect1: (u32, u32, u32, u32)) -> bool {
let (x0, y0, w0, h0) = rect0;
let (x1, y1, w1, h1) = rect1;
(x0 < x1 + w1) && (x0 + w0 > x1) && (y0 < y1 + h1) && (y0 + h0 > y1)
}