[nihav.git] / nihav-itu / src / codecs / h264 / pic_ref.rs

use nihav_core::codecs::DecoderResult;
use nihav_core::frame::{FrameType, NAVideoBufferRef, NATimeInfo};
use nihav_core::refs::*;
use nihav_codec_support::codecs::MV;
use super::sets::SeqParameterSet;
use super::slice::*;
use super::types::*;

#[derive(Clone)]
pub struct PictureInfo {
    pub id:         u16,
    pub full_id:    u32,
    pub time:       NATimeInfo,
    pub user_id:    u32,
    pub pic_type:   FrameType,
    pub buf:        NAVideoBufferRef<u8>,
    pub cur_mb:     usize,
    pub is_ref:     bool,
    pub is_idr:     bool,
    pub long_term:  Option<usize>,

    pub mv_info:    NABufferRef<FrameMV>,
}

#[derive(Clone,Copy,Default, Debug)]
pub struct FrameMBInfo {
    pub mb_type:    CompactMBType,
    pub ref_poc:    [[u16; 2]; 4],
    pub ref_idx:    [[PicRef; 2]; 4],
    pub mv:         [[MV; 2]; 16],
}

impl FrameMBInfo {
    pub fn new() -> Self { Self::default() }
}

#[derive(Clone)]
pub struct FrameMV {
    pub mbs:        Vec<FrameMBInfo>,
    pub mb_stride:  usize,
}

impl FrameMV {
    pub fn new(mb_w: usize, mb_h: usize) -> Self {
        Self {
            mbs:        vec![FrameMBInfo::default(); mb_w * mb_h],
            mb_stride:  mb_w,
        }
    }
}

#[derive(Clone)]
pub struct SliceRefs {
    pub ref_list0:  Vec<Option<PictureInfo>>,
    pub ref_list1:  Vec<Option<PictureInfo>>,
    pub cur_id:     u32,
}

impl SliceRefs {
    pub fn get_ref_id(&self, list_id: u8, ref_id: usize) -> Option<u32> {
        let ref_list = if list_id == 0 { &self.ref_list0 } else { &self.ref_list1 };
        if ref_list.len() > ref_id {
            ref_list[ref_id].as_ref().map(|pic| pic.full_id)
        } else {
            None
        }
    }
    pub fn select_ref_pic(&self, list_id: u8, ref_id: usize) -> Option<NAVideoBufferRef<u8>> {
        let ref_list = if list_id == 0 { &self.ref_list0 } else { &self.ref_list1 };
        if ref_list.len() > ref_id {
            ref_list[ref_id].as_ref().map(|pic| pic.buf.clone())
        } else {
            None
        }
    }
    pub fn get_colocated_info(&self, mb_x: usize, mb_y: usize) -> (FrameMBInfo, u16, bool) {
        if let Some(ref ref_pic) = &self.ref_list1[0] {
            let mv_info = &ref_pic.mv_info;
            let mb = mv_info.mbs[mb_x + mb_y * mv_info.mb_stride];
            (mb, ref_pic.full_id as u16, ref_pic.long_term.is_some())
        } else {
            (FrameMBInfo::default(), 0, false)
        }
    }
    pub fn map_ref0(&self, ref0_id: u16) -> (PicRef, bool) {
        let mut r0_idx = 0;
        let mut long = false;
        for (i, rpic0) in self.ref_list0.iter().enumerate() {
            if let Some(ref pic) = rpic0 {
                if (pic.full_id as u16) == ref0_id {
                    r0_idx = i as u8;
                    long = pic.long_term.is_some();
                    break;
                }
            }
        }
        (PicRef::new(r0_idx), long)
    }
    pub fn map_refs(&self, ref_idx: [PicRef; 2]) -> [u16; 2] {
        let r0 = ref_idx[0].index();
        let r1 = ref_idx[1].index();
        let ref0 = if r0 < self.ref_list0.len() {
                if let Some(ref pic) = self.ref_list0[r0] {
                    pic.full_id as u16
                } else {
                    MISSING_POC
                }
            } else {
                MISSING_POC
            };
        let ref1 = if r1 < self.ref_list1.len() {
                if let Some(ref pic) = self.ref_list1[r1] {
                    pic.full_id as u16
                } else {
                    MISSING_POC
                }
            } else {
                MISSING_POC
            };
        [ref0, ref1]
    }
    pub fn cmp_refs(&self, ref1: [PicRef; 2], ref2: [PicRef; 2]) -> bool {
        if ref1 != ref2 {
            self.cmp_ref(ref1[0], ref2[0], 0) && self.cmp_ref(ref1[1], ref2[1], 1)
        } else {
            true
        }
    }
    fn cmp_ref(&self, ref1: PicRef, ref2: PicRef, list: u8) -> bool {
        if ref1 == ref2 {
            true
        } else {
            let idx0 = ref1.index();
            let idx1 = ref2.index();
            if idx0 == idx1 {
                return true;
            }
            let src = if list == 0 { &self.ref_list0 } else { &self.ref_list1 };
            if idx0 >= src.len() || idx1 >= src.len() {
//panic!("wrong refs");
                return false;
            }
            if let (Some(ref pic0), Some(ref pic1)) = (&src[idx0], &src[idx1]) {
                pic0.full_id == pic1.full_id
            } else {
//panic!("missing pics");
                false
            }
        }
    }
}

pub struct FrameRefs {
    pub ref_pics:   Vec<PictureInfo>,
    pub cur_refs:   SliceRefs,
    pub long_term:  Vec<Option<PictureInfo>>,

    prev_poc_msb:       u32,
    prev_poc_lsb:       u16,
    prev_ref_poc_lsb:   u16,
    prev_frame_num:     u16,
    frame_num_offset:   u32,
    max_frame_num:      i32,
}

impl FrameRefs {
    pub fn new() -> Self {
        Self {
            ref_pics:   Vec::with_capacity(16),
            cur_refs:   SliceRefs {
                            ref_list0:  Vec::with_capacity(3),
                            ref_list1:  Vec::with_capacity(3),
                            cur_id:     0,
                        },
            long_term:  Vec::new(),

            prev_poc_msb:       0,
            prev_poc_lsb:       0,
            prev_ref_poc_lsb:   0,
            prev_frame_num:     0,
            frame_num_offset:   0,
            max_frame_num:      0,
        }
    }
    pub fn fill_ref_nums(&self, dst: &mut Vec<u32>) {
        for pic in self.ref_pics.iter() {
            if !dst.contains(&pic.full_id) {
                dst.push(pic.full_id);
            }
        }
        for ltpic in self.long_term.iter() {
            if let Some(ref pic) = ltpic {
                if !dst.contains(&pic.full_id) {
                    dst.push(pic.full_id);
                }
            }
        }
    }
    pub fn calc_picture_num(&mut self, slice_hdr: &SliceHeader, is_idr: bool, ref_id: u8, sps: &SeqParameterSet) -> u32 {
        self.max_frame_num = 1 << sps.log2_max_frame_num;
        match sps.pic_order_cnt_type {
            0 => {
                if is_idr {
                    //self.prev_poc_msb = 0;
                    self.prev_poc_lsb = 0;
                } else {
                    self.prev_poc_lsb = self.prev_ref_poc_lsb;
                }
                let max_poc_lsb = 1 << sps.log2_max_pic_order_cnt_lsb;
                let half_max_poc_lsb = 1 << (sps.log2_max_pic_order_cnt_lsb - 1);
                let cur_lsb = slice_hdr.pic_order_cnt_lsb;
                let poc_msb = if cur_lsb < self.prev_poc_lsb && (self.prev_poc_lsb - cur_lsb >= half_max_poc_lsb) {
                        self.prev_poc_msb + max_poc_lsb
                    } else if cur_lsb > self.prev_poc_lsb && (cur_lsb - self.prev_poc_lsb > half_max_poc_lsb) {
                        self.prev_poc_msb.wrapping_sub(max_poc_lsb)
                    } else {
                        self.prev_poc_msb
                    };
                let poc = poc_msb + u32::from(cur_lsb);
                if ref_id != 0 {
                    self.prev_ref_poc_lsb = slice_hdr.pic_order_cnt_lsb;
                    self.prev_poc_msb = poc_msb;
                }
                poc
            },
            1 => {
                let off = if self.prev_frame_num > slice_hdr.frame_num {
                        self.frame_num_offset + (1 << sps.log2_max_frame_num)
                    } else {
                        self.frame_num_offset
                    };
                let mut anum = if sps.num_ref_frames_in_pic_order_cnt_cycle != 0 {
                        (off as i32) + i32::from(slice_hdr.frame_num)
                    } else {
                        0
                    };
                if ref_id == 0 && anum > 0 {
                    anum -= 1;
                }
                let (poc_cycle_cnt, fno_in_poc_cycle) = if anum > 0 {
                        let nrf = sps.num_ref_frames_in_pic_order_cnt_cycle as i32;
                        ((anum - 1) / nrf, (anum - 1) % nrf)
                    } else {
                        (0, 0)
                    };
                let mut expected_delta = 0;
                for &offset in sps.offset_for_ref_frame[..sps.num_ref_frames_in_pic_order_cnt_cycle].iter() {
                    expected_delta += offset;
                }
                let mut expected_poc = if anum > 0 {
                        let mut sum = poc_cycle_cnt * expected_delta;
                        for &offset in sps.offset_for_ref_frame[..=fno_in_poc_cycle as usize].iter() {
                            sum += offset;
                        }
                        sum
                    } else {
                        0
                    };
                if ref_id == 0 {
                    expected_poc += sps.offset_for_non_ref_pic;
                }
                let (top_id, _bottom_id) = if !slice_hdr.field_pic {
                        let top_id = expected_poc + slice_hdr.delta_pic_order_cnt[0];
                        let bot_id = top_id + sps.offset_for_top_to_bottom_field + slice_hdr.delta_pic_order_cnt[1];
                        (top_id, bot_id)
                    } else if !slice_hdr.bottom_field {
                        (expected_poc + slice_hdr.delta_pic_order_cnt[0], 0)
                    } else {
                        (0, sps.offset_for_top_to_bottom_field + slice_hdr.delta_pic_order_cnt[1])
                    };
                self.prev_frame_num = slice_hdr.frame_num;
                self.frame_num_offset = off;
                top_id as u32
            },
            _ => {
                if slice_hdr.frame_num < self.prev_frame_num {
                    self.frame_num_offset   += 1 << sps.log2_max_frame_num;
                }
                self.prev_frame_num = slice_hdr.frame_num;
                self.frame_num_offset + u32::from(slice_hdr.frame_num)
            },
        }
    }
    pub fn apply_adaptive_marking(&mut self, marking: &AdaptiveMarking, cur_id: u16, max_id: u16) -> DecoderResult<()> {
        let all_ref_pics = self.ref_pics.clone();

        for (&op, (&arg1, &arg2)) in marking.memory_management_control_op.iter().zip(marking.operation_arg.iter().zip(marking.operation_arg2.iter())).take(marking.num_ops) {
            match op {
                1 => {
                    let src_id = cur_id.wrapping_sub(arg1) & (max_id - 1);
                    let mut found = false;
                    let mut idx = 0;
                    for (i, pic) in self.ref_pics.iter().enumerate() {
                        if pic.id == src_id {
                            found = true;
                            idx = i;
                            break;
                        }
                    }
                    if found {
                        self.ref_pics.remove(idx);
                    }
                },
                2 => { // mark long term picture as unused
                    let idx = arg1 as usize;
                    if idx < self.long_term.len() {
                        self.long_term[idx] = None;
                    }
                },
                3 => {
                    let src_id = cur_id.wrapping_sub(arg1) & (max_id - 1);

                    let didx = arg2 as usize;
                    for pic in all_ref_pics.iter() {
                        if pic.id == src_id {
                            if didx < self.long_term.len() {
                                self.long_term[didx] = Some(pic.clone());
                            }
                            break;
                        }
                    }
                },
                4 => {
                    self.long_term.resize(arg1 as usize, None);
                },
                5 => {
                    self.ref_pics.clear();
                    self.long_term.clear();
                },
                6 => {
                    // assign an long term index to current pic - done elsewhere
                },
                _ => {},
            };
        }
        Ok(())
    }
    pub fn clear_refs(&mut self) {
        self.ref_pics.clear();
        self.long_term.clear();
    }
    #[allow(clippy::cognitive_complexity)]
    pub fn select_refs(&mut self, sps: &SeqParameterSet, slice_hdr: &SliceHeader, cur_id: u32) {
        self.cur_refs.cur_id = cur_id;
        self.cur_refs.ref_list0.clear();
        self.cur_refs.ref_list1.clear();
        let pic_num_mask = if sps.log2_max_frame_num == 16 {
                0xFFFF
            } else {
                (1 << sps.log2_max_frame_num) - 1
            };

        if !slice_hdr.slice_type.is_intra() {
            let has_reordering = slice_hdr.ref_pic_list_reordering_l0;
            if !has_reordering {
                let num_ref = slice_hdr.num_ref_idx_l0_active;
                if slice_hdr.slice_type.is_p() {
                    if !self.ref_pics.is_empty() {
                        for pic in self.ref_pics.iter().rev().take(num_ref) {
                            self.cur_refs.ref_list0.push(Some(pic.clone()));
                        }
                    }
                } else {
                    let mut pivot = 0;
                    for (i, pic) in self.ref_pics.iter().enumerate() {
                        pivot = i;
                        if pic.full_id > cur_id {
                            break;
                        }
                    }
                    for pic in self.ref_pics[..pivot].iter().rev() {
                        if self.cur_refs.ref_list0.len() >= num_ref {
                            break;
                        }
                        self.cur_refs.ref_list0.push(Some(pic.clone()));
                    }
                    for pic in self.ref_pics.iter().skip(pivot) {
                        if self.cur_refs.ref_list0.len() >= num_ref {
                            break;
                        }
                        self.cur_refs.ref_list0.push(Some(pic.clone()));
                    }
                }
                if !self.long_term.is_empty() && self.cur_refs.ref_list0.len() < num_ref {
                    let copy_size = num_ref - self.cur_refs.ref_list0.len();
                    for ltpic in self.long_term.iter().take(copy_size) {
                        self.cur_refs.ref_list0.push(ltpic.clone());
                    }
                }
            } else {
                form_ref_list(&mut self.cur_refs.ref_list0,
                              &self.ref_pics, &self.long_term,
                              &slice_hdr.reordering_list_l0,
                              slice_hdr.frame_num, pic_num_mask);
            }
            if slice_hdr.slice_type.is_b() {
                let has_reordering = slice_hdr.ref_pic_list_reordering_l1;
                if !has_reordering {
                    let num_ref = slice_hdr.num_ref_idx_l1_active;
                    let mut pivot = 0;
                    for (i, pic) in self.ref_pics.iter().enumerate() {
                        pivot = i;
                        if pic.full_id > cur_id {
                            break;
                        }
                    }
                    for pic in self.ref_pics.iter().skip(pivot) {
                        if self.cur_refs.ref_list1.len() >= num_ref {
                            break;
                        }
                        self.cur_refs.ref_list1.push(Some(pic.clone()));
                    }
                    for pic in self.ref_pics[..pivot].iter().rev() {
                        if self.cur_refs.ref_list1.len() >= num_ref {
                            break;
                        }
                        self.cur_refs.ref_list1.push(Some(pic.clone()));
                    }
                    if !self.long_term.is_empty() && self.cur_refs.ref_list1.len() < num_ref {
                        let copy_size = num_ref - self.cur_refs.ref_list1.len();
                        for ltpic in self.long_term.iter().take(copy_size) {
                            self.cur_refs.ref_list1.push(ltpic.clone());
                        }
                    }
                    if self.cur_refs.ref_list1.len() > 1 && self.cur_refs.ref_list0.len() == self.cur_refs.ref_list1.len() {
                        let mut equal = true;
                        for (pic1, pic2) in self.cur_refs.ref_list0.iter().zip(self.cur_refs.ref_list1.iter()) {
                            match (pic1, pic2) {
                                (Some(p1), Some(p2)) => {
                                    if p1.full_id != p2.full_id {
                                        equal = false;
                                        break;
                                    }
                                },
                                (None, None) => {},
                                _ => {
                                    equal = false;
                                    break;
                                },
                            };
                        }
                        if equal {
                            self.cur_refs.ref_list1.swap(0, 1);
                        }
                    }
                } else {
                    form_ref_list(&mut self.cur_refs.ref_list1,
                                  &self.ref_pics, &self.long_term,
                                  &slice_hdr.reordering_list_l1,
                                  slice_hdr.frame_num, pic_num_mask);
                }
            }
        }
    }
    pub fn add_short_term(&mut self, cpic: PictureInfo, num_ref_frames: usize) {
        if !self.ref_pics.is_empty() && self.ref_pics.len() >= num_ref_frames {
            let base_id = i32::from(cpic.id);
            let mut min_id  = base_id;
            let mut min_idx = 0;
            for (i, pic) in self.ref_pics.iter().enumerate() {
                let mut pic_id = i32::from(pic.id);
                if pic_id > base_id {
                    pic_id -= self.max_frame_num;
                }
                if pic_id < min_id {
                    min_id = pic_id;
                    min_idx = i;
                }
            }
            self.ref_pics.remove(min_idx);
        }
        if self.ref_pics.is_empty() || self.ref_pics.last().unwrap().full_id < cpic.full_id {
            self.ref_pics.push(cpic);
        } else {
            let mut idx = 0;
            for (i, pic) in self.ref_pics.iter().enumerate() {
                if pic.full_id < cpic.full_id {
                    idx = i;
                } else {
                    break;
                }
            }
            self.ref_pics.insert(idx + 1, cpic);
        }
    }
    pub fn add_long_term(&mut self, lt_idx: usize, cpic: PictureInfo) {
        if lt_idx < self.long_term.len() {
            self.long_term[lt_idx] = Some(cpic);
        }
    }
}

fn form_ref_list(ref_list: &mut Vec<Option<PictureInfo>>, ref_pics: &[PictureInfo], long_term: &[Option<PictureInfo>], reord_info: &ReorderingInfo, cur_id: u16, pic_num_mask: u16) {
    let mut ref_pic_id = cur_id;
    for (&op, &num) in reord_info.reordering_of_pic_nums_idc.iter().zip(reord_info.abs_diff_or_num.iter()).take(reord_info.num_ops) {
        if op < 2 {
            if op == 0 {
                ref_pic_id = ref_pic_id.wrapping_sub(num) & pic_num_mask;
            } else {
                ref_pic_id = ref_pic_id.wrapping_add(num) & pic_num_mask;
            }
            let mut found = false;
            for pic in ref_pics.iter() {
                if pic.id == ref_pic_id {
                    ref_list.push(Some(pic.clone()));
                    found = true;
                    break;
                }
            }
            if !found {
                ref_list.push(None);
            }
        } else {
            let idx = num as usize;
            if idx < long_term.len() {
                ref_list.push(long_term[idx].clone());
            } else {
                ref_list.push(None);
            }
        }
    }
}
Commit	Line	Data
696e4e20	1	use nihav_core::codecs::DecoderResult;
11d7aef2	2	use nihav_core::frame::{FrameType, NAVideoBufferRef, NATimeInfo};
93839abd	3	use nihav_core::refs::*;
696e4e20 KS	4	use nihav_codec_support::codecs::MV;
	5	use super::sets::SeqParameterSet;
	6	use super::slice::*;
	7	use super::types::*;
	8
	9	#[derive(Clone)]
	10	pub struct PictureInfo {
	11	pub id: u16,
	12	pub full_id: u32,
11d7aef2 KS	13	pub time: NATimeInfo,
11d7aef2 KS	14	pub user_id: u32,
696e4e20 KS	15	pub pic_type: FrameType,
	16	pub buf: NAVideoBufferRef<u8>,
	17	pub cur_mb: usize,
	18	pub is_ref: bool,
11d7aef2	19	pub is_idr: bool,
696e4e20 KS	20	pub long_term: Option<usize>,
696e4e20 KS	21
93839abd	22	pub mv_info: NABufferRef<FrameMV>,
696e4e20 KS	23	}
	24
	25	#[derive(Clone,Copy,Default, Debug)]
	26	pub struct FrameMBInfo {
	27	pub mb_type: CompactMBType,
	28	pub ref_poc: [[u16; 2]; 4],
	29	pub ref_idx: [[PicRef; 2]; 4],
	30	pub mv: [[MV; 2]; 16],
	31	}
	32
	33	impl FrameMBInfo {
	34	pub fn new() -> Self { Self::default() }
	35	}
	36
	37	#[derive(Clone)]
	38	pub struct FrameMV {
	39	pub mbs: Vec<FrameMBInfo>,
	40	pub mb_stride: usize,
	41	}
	42
	43	impl FrameMV {
	44	pub fn new(mb_w: usize, mb_h: usize) -> Self {
	45	Self {
	46	mbs: vec![FrameMBInfo::default(); mb_w * mb_h],
	47	mb_stride: mb_w,
	48	}
	49	}
	50	}
	51
56a17e69 KS	52	#[derive(Clone)]
56a17e69 KS	53	pub struct SliceRefs {
696e4e20 KS	54	pub ref_list0: Vec<Option<PictureInfo>>,
696e4e20 KS	55	pub ref_list1: Vec<Option<PictureInfo>>,
56a17e69 KS	56	pub cur_id: u32,
	57	}
	58
	59	impl SliceRefs {
11d7aef2 KS	60	pub fn get_ref_id(&self, list_id: u8, ref_id: usize) -> Option<u32> {
	61	let ref_list = if list_id == 0 { &self.ref_list0 } else { &self.ref_list1 };
	62	if ref_list.len() > ref_id {
	63	ref_list[ref_id].as_ref().map(\|pic\| pic.full_id)
	64	} else {
	65	None
	66	}
	67	}
56a17e69 KS	68	pub fn select_ref_pic(&self, list_id: u8, ref_id: usize) -> Option<NAVideoBufferRef<u8>> {
	69	let ref_list = if list_id == 0 { &self.ref_list0 } else { &self.ref_list1 };
	70	if ref_list.len() > ref_id {
	71	ref_list[ref_id].as_ref().map(\|pic\| pic.buf.clone())
	72	} else {
	73	None
	74	}
	75	}
	76	pub fn get_colocated_info(&self, mb_x: usize, mb_y: usize) -> (FrameMBInfo, u16, bool) {
	77	if let Some(ref ref_pic) = &self.ref_list1[0] {
	78	let mv_info = &ref_pic.mv_info;
	79	let mb = mv_info.mbs[mb_x + mb_y * mv_info.mb_stride];
	80	(mb, ref_pic.full_id as u16, ref_pic.long_term.is_some())
	81	} else {
	82	(FrameMBInfo::default(), 0, false)
	83	}
	84	}
	85	pub fn map_ref0(&self, ref0_id: u16) -> (PicRef, bool) {
	86	let mut r0_idx = 0;
	87	let mut long = false;
	88	for (i, rpic0) in self.ref_list0.iter().enumerate() {
	89	if let Some(ref pic) = rpic0 {
	90	if (pic.full_id as u16) == ref0_id {
	91	r0_idx = i as u8;
	92	long = pic.long_term.is_some();
	93	break;
	94	}
	95	}
	96	}
	97	(PicRef::new(r0_idx), long)
	98	}
	99	pub fn map_refs(&self, ref_idx: [PicRef; 2]) -> [u16; 2] {
	100	let r0 = ref_idx[0].index();
	101	let r1 = ref_idx[1].index();
	102	let ref0 = if r0 < self.ref_list0.len() {
	103	if let Some(ref pic) = self.ref_list0[r0] {
	104	pic.full_id as u16
	105	} else {
	106	MISSING_POC
	107	}
	108	} else {
	109	MISSING_POC
	110	};
	111	let ref1 = if r1 < self.ref_list1.len() {
	112	if let Some(ref pic) = self.ref_list1[r1] {
	113	pic.full_id as u16
	114	} else {
	115	MISSING_POC
	116	}
	117	} else {
	118	MISSING_POC
	119	};
	120	[ref0, ref1]
	121	}
	122	pub fn cmp_refs(&self, ref1: [PicRef; 2], ref2: [PicRef; 2]) -> bool {
	123	if ref1 != ref2 {
	124	self.cmp_ref(ref1[0], ref2[0], 0) && self.cmp_ref(ref1[1], ref2[1], 1)
	125	} else {
	126	true
	127	}
	128	}
	129	fn cmp_ref(&self, ref1: PicRef, ref2: PicRef, list: u8) -> bool {
	130	if ref1 == ref2 {
	131	true
132	} else {
133	let idx0 = ref1.index();
134	let idx1 = ref2.index();
135	if idx0 == idx1 {
136	return true;
137	}
138	let src = if list == 0 { &self.ref_list0 } else { &self.ref_list1 };
139	if idx0 >= src.len() \|\| idx1 >= src.len() {
140	//panic!("wrong refs");
141	return false;
142	}
143	if let (Some(ref pic0), Some(ref pic1)) = (&src[idx0], &src[idx1]) {
144	pic0.full_id == pic1.full_id
145	} else {
146	//panic!("missing pics");
147	false
148	}
149	}
150	}
151	}
152
153	pub struct FrameRefs {
154	pub ref_pics: Vec<PictureInfo>,
155	pub cur_refs: SliceRefs,
696e4e20 KS	156	pub long_term: Vec<Option<PictureInfo>>,
	157
	158	prev_poc_msb: u32,
	159	prev_poc_lsb: u16,
	160	prev_ref_poc_lsb: u16,
	161	prev_frame_num: u16,
	162	frame_num_offset: u32,
02cfd8de	163	max_frame_num: i32,
696e4e20 KS	164	}
	165
	166	impl FrameRefs {
	167	pub fn new() -> Self {
	168	Self {
	169	ref_pics: Vec::with_capacity(16),
56a17e69 KS	170	cur_refs: SliceRefs {
	171	ref_list0: Vec::with_capacity(3),
	172	ref_list1: Vec::with_capacity(3),
	173	cur_id: 0,
	174	},
696e4e20 KS	175	long_term: Vec::new(),
	176
	177	prev_poc_msb: 0,
	178	prev_poc_lsb: 0,
	179	prev_ref_poc_lsb: 0,
	180	prev_frame_num: 0,
	181	frame_num_offset: 0,
02cfd8de	182	max_frame_num: 0,
696e4e20 KS	183	}
696e4e20 KS	184	}
11d7aef2 KS	185	pub fn fill_ref_nums(&self, dst: &mut Vec<u32>) {
	186	for pic in self.ref_pics.iter() {
	187	if !dst.contains(&pic.full_id) {
	188	dst.push(pic.full_id);
	189	}
	190	}
	191	for ltpic in self.long_term.iter() {
	192	if let Some(ref pic) = ltpic {
	193	if !dst.contains(&pic.full_id) {
	194	dst.push(pic.full_id);
	195	}
	196	}
	197	}
	198	}
696e4e20	199	pub fn calc_picture_num(&mut self, slice_hdr: &SliceHeader, is_idr: bool, ref_id: u8, sps: &SeqParameterSet) -> u32 {
02cfd8de	200	self.max_frame_num = 1 << sps.log2_max_frame_num;
696e4e20 KS	201	match sps.pic_order_cnt_type {
	202	0 => {
	203	if is_idr {
	204	//self.prev_poc_msb = 0;
	205	self.prev_poc_lsb = 0;
	206	} else {
	207	self.prev_poc_lsb = self.prev_ref_poc_lsb;
	208	}
	209	let max_poc_lsb = 1 << sps.log2_max_pic_order_cnt_lsb;
	210	let half_max_poc_lsb = 1 << (sps.log2_max_pic_order_cnt_lsb - 1);
	211	let cur_lsb = slice_hdr.pic_order_cnt_lsb;
	212	let poc_msb = if cur_lsb < self.prev_poc_lsb && (self.prev_poc_lsb - cur_lsb >= half_max_poc_lsb) {
	213	self.prev_poc_msb + max_poc_lsb
	214	} else if cur_lsb > self.prev_poc_lsb && (cur_lsb - self.prev_poc_lsb > half_max_poc_lsb) {
	215	self.prev_poc_msb.wrapping_sub(max_poc_lsb)
	216	} else {
	217	self.prev_poc_msb
	218	};
	219	let poc = poc_msb + u32::from(cur_lsb);
	220	if ref_id != 0 {
	221	self.prev_ref_poc_lsb = slice_hdr.pic_order_cnt_lsb;
	222	self.prev_poc_msb = poc_msb;
	223	}
	224	poc
	225	},
	226	1 => {
	227	let off = if self.prev_frame_num > slice_hdr.frame_num {
	228	self.frame_num_offset + (1 << sps.log2_max_frame_num)
	229	} else {
	230	self.frame_num_offset
	231	};
	232	let mut anum = if sps.num_ref_frames_in_pic_order_cnt_cycle != 0 {
	233	(off as i32) + i32::from(slice_hdr.frame_num)
	234	} else {
	235	0
	236	};
	237	if ref_id == 0 && anum > 0 {
	238	anum -= 1;
	239	}
	240	let (poc_cycle_cnt, fno_in_poc_cycle) = if anum > 0 {
	241	let nrf = sps.num_ref_frames_in_pic_order_cnt_cycle as i32;
	242	((anum - 1) / nrf, (anum - 1) % nrf)
	243	} else {
	244	(0, 0)
	245	};
	246	let mut expected_delta = 0;
	247	for &offset in sps.offset_for_ref_frame[..sps.num_ref_frames_in_pic_order_cnt_cycle].iter() {
	248	expected_delta += offset;
	249	}
	250	let mut expected_poc = if anum > 0 {
	251	let mut sum = poc_cycle_cnt * expected_delta;
	252	for &offset in sps.offset_for_ref_frame[..=fno_in_poc_cycle as usize].iter() {
	253	sum += offset;
	254	}
	255	sum
	256	} else {
	257	0
	258	};
	259	if ref_id == 0 {
	260	expected_poc += sps.offset_for_non_ref_pic;
	261	}
	262	let (top_id, _bottom_id) = if !slice_hdr.field_pic {
	263	let top_id = expected_poc + slice_hdr.delta_pic_order_cnt[0];
	264	let bot_id = top_id + sps.offset_for_top_to_bottom_field + slice_hdr.delta_pic_order_cnt[1];
265	(top_id, bot_id)
266	} else if !slice_hdr.bottom_field {
267	(expected_poc + slice_hdr.delta_pic_order_cnt[0], 0)
268	} else {
269	(0, sps.offset_for_top_to_bottom_field + slice_hdr.delta_pic_order_cnt[1])
270	};
271	self.prev_frame_num = slice_hdr.frame_num;
272	self.frame_num_offset = off;
273	top_id as u32
274	},
275	_ => {
276	if slice_hdr.frame_num < self.prev_frame_num {
277	self.frame_num_offset += 1 << sps.log2_max_frame_num;
278	}
279	self.prev_frame_num = slice_hdr.frame_num;
280	self.frame_num_offset + u32::from(slice_hdr.frame_num)
281	},
282	}
283	}
284	pub fn apply_adaptive_marking(&mut self, marking: &AdaptiveMarking, cur_id: u16, max_id: u16) -> DecoderResult<()> {
285	let all_ref_pics = self.ref_pics.clone();
286
287	for (&op, (&arg1, &arg2)) in marking.memory_management_control_op.iter().zip(marking.operation_arg.iter().zip(marking.operation_arg2.iter())).take(marking.num_ops) {
288	match op {
289	1 => {
290	let src_id = cur_id.wrapping_sub(arg1) & (max_id - 1);
291	let mut found = false;
292	let mut idx = 0;
293	for (i, pic) in self.ref_pics.iter().enumerate() {
294	if pic.id == src_id {
295	found = true;
296	idx = i;
297	break;
298	}
299	}
300	if found {
301	self.ref_pics.remove(idx);
302	}
303	},
304	2 => { // mark long term picture as unused
305	let idx = arg1 as usize;
306	if idx < self.long_term.len() {
307	self.long_term[idx] = None;
308	}
309	},
310	3 => {
311	let src_id = cur_id.wrapping_sub(arg1) & (max_id - 1);
312
313	let didx = arg2 as usize;
314	for pic in all_ref_pics.iter() {
315	if pic.id == src_id {
316	if didx < self.long_term.len() {
317	self.long_term[didx] = Some(pic.clone());
318	}
319	break;
320	}
321	}
322	},
323	4 => {
324	self.long_term.resize(arg1 as usize, None);
325	},
326	5 => {
37952415 KS	327	self.ref_pics.clear();
37952415 KS	328	self.long_term.clear();
696e4e20 KS	329	},
	330	6 => {
	331	// assign an long term index to current pic - done elsewhere
	332	},
	333	_ => {},
	334	};
	335	}
	336	Ok(())
	337	}
	338	pub fn clear_refs(&mut self) {
37952415 KS	339	self.ref_pics.clear();
37952415 KS	340	self.long_term.clear();
696e4e20	341	}
b7c882c1	342	#[allow(clippy::cognitive_complexity)]
696e4e20	343	pub fn select_refs(&mut self, sps: &SeqParameterSet, slice_hdr: &SliceHeader, cur_id: u32) {
56a17e69 KS	344	self.cur_refs.cur_id = cur_id;
	345	self.cur_refs.ref_list0.clear();
	346	self.cur_refs.ref_list1.clear();
696e4e20 KS	347	let pic_num_mask = if sps.log2_max_frame_num == 16 {
	348	0xFFFF
	349	} else {
	350	(1 << sps.log2_max_frame_num) - 1
	351	};
56a17e69	352
696e4e20 KS	353	if !slice_hdr.slice_type.is_intra() {
	354	let has_reordering = slice_hdr.ref_pic_list_reordering_l0;
	355	if !has_reordering {
	356	let num_ref = slice_hdr.num_ref_idx_l0_active;
	357	if slice_hdr.slice_type.is_p() {
	358	if !self.ref_pics.is_empty() {
	359	for pic in self.ref_pics.iter().rev().take(num_ref) {
56a17e69	360	self.cur_refs.ref_list0.push(Some(pic.clone()));
696e4e20 KS	361	}
	362	}
	363	} else {
	364	let mut pivot = 0;
	365	for (i, pic) in self.ref_pics.iter().enumerate() {
	366	pivot = i;
	367	if pic.full_id > cur_id {
	368	break;
	369	}
	370	}
	371	for pic in self.ref_pics[..pivot].iter().rev() {
56a17e69	372	if self.cur_refs.ref_list0.len() >= num_ref {
696e4e20 KS	373	break;
696e4e20 KS	374	}
56a17e69	375	self.cur_refs.ref_list0.push(Some(pic.clone()));
696e4e20 KS	376	}
696e4e20 KS	377	for pic in self.ref_pics.iter().skip(pivot) {
56a17e69	378	if self.cur_refs.ref_list0.len() >= num_ref {
696e4e20 KS	379	break;
696e4e20 KS	380	}
56a17e69	381	self.cur_refs.ref_list0.push(Some(pic.clone()));
696e4e20 KS	382	}
696e4e20 KS	383	}
56a17e69 KS	384	if !self.long_term.is_empty() && self.cur_refs.ref_list0.len() < num_ref {
56a17e69 KS	385	let copy_size = num_ref - self.cur_refs.ref_list0.len();
696e4e20	386	for ltpic in self.long_term.iter().take(copy_size) {
56a17e69	387	self.cur_refs.ref_list0.push(ltpic.clone());
696e4e20 KS	388	}
	389	}
	390	} else {
56a17e69	391	form_ref_list(&mut self.cur_refs.ref_list0,
696e4e20 KS	392	&self.ref_pics, &self.long_term,
	393	&slice_hdr.reordering_list_l0,
	394	slice_hdr.frame_num, pic_num_mask);
	395	}
	396	if slice_hdr.slice_type.is_b() {
	397	let has_reordering = slice_hdr.ref_pic_list_reordering_l1;
	398	if !has_reordering {
	399	let num_ref = slice_hdr.num_ref_idx_l1_active;
	400	let mut pivot = 0;
	401	for (i, pic) in self.ref_pics.iter().enumerate() {
	402	pivot = i;
	403	if pic.full_id > cur_id {
	404	break;
	405	}
	406	}
	407	for pic in self.ref_pics.iter().skip(pivot) {
56a17e69	408	if self.cur_refs.ref_list1.len() >= num_ref {
696e4e20 KS	409	break;
696e4e20 KS	410	}
56a17e69	411	self.cur_refs.ref_list1.push(Some(pic.clone()));
696e4e20 KS	412	}
696e4e20 KS	413	for pic in self.ref_pics[..pivot].iter().rev() {
56a17e69	414	if self.cur_refs.ref_list1.len() >= num_ref {
696e4e20 KS	415	break;
696e4e20 KS	416	}
56a17e69	417	self.cur_refs.ref_list1.push(Some(pic.clone()));
696e4e20	418	}
56a17e69 KS	419	if !self.long_term.is_empty() && self.cur_refs.ref_list1.len() < num_ref {
56a17e69 KS	420	let copy_size = num_ref - self.cur_refs.ref_list1.len();
696e4e20	421	for ltpic in self.long_term.iter().take(copy_size) {
56a17e69	422	self.cur_refs.ref_list1.push(ltpic.clone());
696e4e20 KS	423	}
696e4e20 KS	424	}
56a17e69	425	if self.cur_refs.ref_list1.len() > 1 && self.cur_refs.ref_list0.len() == self.cur_refs.ref_list1.len() {
696e4e20	426	let mut equal = true;
56a17e69	427	for (pic1, pic2) in self.cur_refs.ref_list0.iter().zip(self.cur_refs.ref_list1.iter()) {
696e4e20 KS	428	match (pic1, pic2) {
	429	(Some(p1), Some(p2)) => {
	430	if p1.full_id != p2.full_id {
	431	equal = false;
	432	break;
	433	}
	434	},
	435	(None, None) => {},
	436	_ => {
	437	equal = false;
	438	break;
	439	},
	440	};
	441	}
	442	if equal {
56a17e69	443	self.cur_refs.ref_list1.swap(0, 1);
696e4e20 KS	444	}
	445	}
	446	} else {
56a17e69	447	form_ref_list(&mut self.cur_refs.ref_list1,
696e4e20 KS	448	&self.ref_pics, &self.long_term,
	449	&slice_hdr.reordering_list_l1,
	450	slice_hdr.frame_num, pic_num_mask);
	451	}
	452	}
	453	}
	454	}
	455	pub fn add_short_term(&mut self, cpic: PictureInfo, num_ref_frames: usize) {
	456	if !self.ref_pics.is_empty() && self.ref_pics.len() >= num_ref_frames {
02cfd8de KS	457	let base_id = i32::from(cpic.id);
	458	let mut min_id = base_id;
	459	let mut min_idx = 0;
	460	for (i, pic) in self.ref_pics.iter().enumerate() {
	461	let mut pic_id = i32::from(pic.id);
	462	if pic_id > base_id {
	463	pic_id -= self.max_frame_num;
	464	}
	465	if pic_id < min_id {
	466	min_id = pic_id;
	467	min_idx = i;
	468	}
	469	}
	470	self.ref_pics.remove(min_idx);
696e4e20 KS	471	}
	472	if self.ref_pics.is_empty() \|\| self.ref_pics.last().unwrap().full_id < cpic.full_id {
	473	self.ref_pics.push(cpic);
	474	} else {
	475	let mut idx = 0;
	476	for (i, pic) in self.ref_pics.iter().enumerate() {
	477	if pic.full_id < cpic.full_id {
	478	idx = i;
	479	} else {
	480	break;
	481	}
	482	}
	483	self.ref_pics.insert(idx + 1, cpic);
	484	}
	485	}
	486	pub fn add_long_term(&mut self, lt_idx: usize, cpic: PictureInfo) {
	487	if lt_idx < self.long_term.len() {
	488	self.long_term[lt_idx] = Some(cpic);
	489	}
	490	}
696e4e20 KS	491	}
696e4e20 KS	492
4a1ca15c	493	fn form_ref_list(ref_list: &mut Vec<Option<PictureInfo>>, ref_pics: &[PictureInfo], long_term: &[Option<PictureInfo>], reord_info: &ReorderingInfo, cur_id: u16, pic_num_mask: u16) {
696e4e20 KS	494	let mut ref_pic_id = cur_id;
	495	for (&op, &num) in reord_info.reordering_of_pic_nums_idc.iter().zip(reord_info.abs_diff_or_num.iter()).take(reord_info.num_ops) {
	496	if op < 2 {
	497	if op == 0 {
	498	ref_pic_id = ref_pic_id.wrapping_sub(num) & pic_num_mask;
	499	} else {
	500	ref_pic_id = ref_pic_id.wrapping_add(num) & pic_num_mask;
	501	}
	502	let mut found = false;
	503	for pic in ref_pics.iter() {
	504	if pic.id == ref_pic_id {
	505	ref_list.push(Some(pic.clone()));
	506	found = true;
	507	break;
	508	}
	509	}
	510	if !found {
	511	ref_list.push(None);
	512	}
	513	} else {
	514	let idx = num as usize;
	515	if idx < long_term.len() {
	516	ref_list.push(long_term[idx].clone());
	517	} else {
	518	ref_list.push(None);
	519	}
	520	}
	521	}
	522	}