--- /dev/null
+//use std::mem;
+use nihav_core::codecs::DecoderError;
+use nihav_core::frame::*;
+use super::super::*;
+use super::super::blockdsp;
+use super::*;
+//use super::code::*;
+use nihav_core::formats;
+
+#[allow(dead_code)]
+struct MVInfo {
+ mv: Vec<MV>,
+ mb_w: usize,
+ mb_stride: usize,
+ mb_start: usize,
+ top: bool,
+ mvmode: MVMode,
+}
+
+impl MVInfo {
+ fn new() -> Self { MVInfo{ mv: Vec::new(), mb_w: 0, mb_stride: 0, mb_start: 0, top: true, mvmode: MVMode::Old } }
+ fn reset(&mut self, mb_w: usize, mb_start: usize, mvmode: MVMode) {
+ self.mb_start = mb_start;
+ self.mb_w = mb_w;
+ self.mb_stride = mb_w * 2;
+ self.mv.resize(self.mb_stride * 3, ZERO_MV);
+ self.mvmode = mvmode;
+ }
+ fn update_row(&mut self) {
+ self.mb_start = self.mb_w + 1;
+ self.top = false;
+ for i in 0..self.mb_stride {
+ self.mv[i] = self.mv[self.mb_stride * 2 + i];
+ }
+ }
+ #[allow(non_snake_case)]
+ fn predict(&mut self, mb_x: usize, blk_no: usize, use4: bool, diff: MV, first_line: bool, first_mb: bool) -> MV {
+ let A;
+ let B;
+ let C;
+ let last = mb_x == self.mb_w - 1;
+ match blk_no {
+ 0 => {
+ if mb_x != self.mb_start {
+ A = if !first_mb { self.mv[self.mb_stride + mb_x * 2 - 1] } else { ZERO_MV };
+ B = if !first_line { self.mv[ mb_x * 2] } else { A };
+ C = if !first_line && !last { self.mv[mb_x * 2 + 2] } else { ZERO_MV };
+ } else {
+ A = ZERO_MV; B = ZERO_MV; C = ZERO_MV;
+ }
+ },
+ 1 => {
+ A = self.mv[self.mb_stride + mb_x * 2];
+ B = if !first_line { self.mv[mb_x * 2 + 1] } else { A };
+ C = if !first_line && !last { self.mv[mb_x * 2 + 2] } else { ZERO_MV/*A*/ };
+ },
+ 2 => {
+ A = if mb_x != self.mb_start { self.mv[self.mb_stride * 2 + mb_x * 2 - 1] } else { ZERO_MV };
+ B = self.mv[self.mb_stride + mb_x * 2];
+ C = self.mv[self.mb_stride + mb_x * 2 + 1];
+ },
+ 3 => {
+ A = self.mv[self.mb_stride * 2 + mb_x * 2];
+ B = self.mv[self.mb_stride * 1 + mb_x * 2 + 1];
+ C = self.mv[self.mb_stride * 1 + mb_x * 2];
+ },
+ _ => { return ZERO_MV; }
+ }
+ let pred_mv = MV::pred(A, B, C);
+ let new_mv = MV::add_umv(pred_mv, diff, self.mvmode);
+ if !use4 {
+ self.mv[self.mb_stride * 1 + mb_x * 2 + 0] = new_mv;
+ self.mv[self.mb_stride * 1 + mb_x * 2 + 1] = new_mv;
+ self.mv[self.mb_stride * 2 + mb_x * 2 + 0] = new_mv;
+ self.mv[self.mb_stride * 2 + mb_x * 2 + 1] = new_mv;
+ } else {
+ match blk_no {
+ 0 => { self.mv[self.mb_stride * 1 + mb_x * 2 + 0] = new_mv; },
+ 1 => { self.mv[self.mb_stride * 1 + mb_x * 2 + 1] = new_mv; },
+ 2 => { self.mv[self.mb_stride * 2 + mb_x * 2 + 0] = new_mv; },
+ 3 => { self.mv[self.mb_stride * 2 + mb_x * 2 + 1] = new_mv; },
+ _ => {},
+ };
+ }
+
+ new_mv
+ }
+ fn set_zero_mv(&mut self, mb_x: usize) {
+ self.mv[self.mb_stride * 1 + mb_x * 2 + 0] = ZERO_MV;
+ self.mv[self.mb_stride * 1 + mb_x * 2 + 1] = ZERO_MV;
+ self.mv[self.mb_stride * 2 + mb_x * 2 + 0] = ZERO_MV;
+ self.mv[self.mb_stride * 2 + mb_x * 2 + 1] = ZERO_MV;
+ }
+ fn get_mv(&self, mb_x: usize, blk_no: usize) -> MV {
+ self.mv[self.mb_stride + mb_x * 2 + (blk_no & 1) + (blk_no >> 1) * self.mb_stride]
+ }
+}
+
+#[allow(dead_code)]
+#[derive(Clone,Copy)]
+struct BMB {
+ num_mv: usize,
+ mv_f: [MV; 4],
+ mv_b: [MV; 4],
+ fwd: bool,
+ blk: [[i16; 64]; 6],
+ cbp: u8,
+}
+
+impl BMB {
+ fn new() -> Self { BMB {blk: [[0; 64]; 6], cbp: 0, fwd: false, mv_f: [ZERO_MV; 4], mv_b: [ZERO_MV; 4], num_mv: 0} }
+}
+
+#[derive(Clone,Copy)]
+struct PredCoeffs {
+ hor: [[i16; 8]; 6],
+ ver: [[i16; 8]; 6],
+}
+
+const ZERO_PRED_COEFFS: PredCoeffs = PredCoeffs { hor: [[0; 8]; 6], ver: [[0; 8]; 6] };
+
+pub struct H263BaseDecoder {
+ w: usize,
+ h: usize,
+ mb_w: usize,
+ mb_h: usize,
+ num_mb: usize,
+ ftype: Type,
+ ipbs: IPBShuffler,
+ next_ts: u16,
+ last_ts: u16,
+ tsdiff: u16,
+ has_b: bool,
+ b_data: Vec<BMB>,
+ pred_coeffs: Vec<PredCoeffs>,
+ is_gob: bool,
+ slice_reset: bool,
+ may_have_b_frames: bool,
+ mv_data: Vec<BlockMVInfo>,
+}
+
+#[inline]
+fn clip_dc(dc: i16) -> i16 {
+ if dc < 0 { 0 }
+ else if dc > 2046 { 2046 }
+ else { (dc + 1) & !1 }
+}
+
+#[inline]
+fn clip_ac(ac: i16) -> i16 {
+ if ac < -2048 { -2048 }
+ else if ac > 2047 { 2047 }
+ else { ac }
+}
+
+#[allow(dead_code)]
+impl H263BaseDecoder {
+ pub fn new_with_opts(is_gob: bool, slice_reset: bool, may_have_b_frames: bool) -> Self {
+ H263BaseDecoder{
+ w: 0, h: 0, mb_w: 0, mb_h: 0, num_mb: 0,
+ ftype: Type::Special,
+ ipbs: IPBShuffler::new(),
+ last_ts: 0, next_ts: 0, tsdiff: 0,
+ has_b: false, b_data: Vec::new(),
+ pred_coeffs: Vec::new(),
+ is_gob, slice_reset,
+ may_have_b_frames,
+ mv_data: Vec::new(),
+ }
+ }
+ pub fn new(is_gob: bool) -> Self {
+ Self::new_with_opts(is_gob, true, false)
+ }
+ pub fn new_b_frames(is_gob: bool) -> Self {
+ Self::new_with_opts(is_gob, true, true)
+ }
+
+ pub fn is_intra(&self) -> bool { self.ftype == Type::I }
+ pub fn get_frame_type(&self) -> FrameType {
+ match self.ftype {
+ Type::I => FrameType::I,
+ Type::P => FrameType::P,
+ Type::B => FrameType::B,
+ Type::PB => FrameType::P,
+ Type::Skip => FrameType::Skip,
+ Type::Special => FrameType::Skip,
+ }
+ }
+ pub fn get_dimensions(&self) -> (usize, usize) { (self.w, self.h) }
+
+ pub fn parse_frame(&mut self, bd: &mut BlockDecoder, bdsp: &BlockDSP) -> DecoderResult<NABufferType> {
+ let pinfo = bd.decode_pichdr()?;
+ let mut mvi = MVInfo::new();
+ let mut mvi2 = MVInfo::new();
+ let mut cbpi = CBPInfo::new();
+
+//todo handle res change
+ self.w = pinfo.w;
+ self.h = pinfo.h;
+ self.mb_w = (pinfo.w + 15) >> 4;
+ self.mb_h = (pinfo.h + 15) >> 4;
+ self.num_mb = self.mb_w * self.mb_h;
+ self.ftype = pinfo.mode;
+ self.has_b = pinfo.is_pb();
+
+ if self.has_b {
+ self.mv_data.truncate(0);
+ }
+
+ let save_b_data = pinfo.mode.is_ref() && self.may_have_b_frames;
+ if save_b_data {
+ self.mv_data.truncate(0);
+ }
+ let is_b = pinfo.mode == Type::B;
+
+ let tsdiff = if pinfo.is_pb() { pinfo.ts.wrapping_sub(self.last_ts) >> 1 }
+ else { self.last_ts.wrapping_sub(self.next_ts) >> 1 };
+ let bsdiff = if pinfo.is_pb() { (pinfo.get_pbinfo().get_trb() as u16) << 7 }
+ else { pinfo.ts.wrapping_sub(self.next_ts) >> 1 };
+
+ let fmt = formats::YUV420_FORMAT;
+ let vinfo = NAVideoInfo::new(self.w, self.h, false, fmt);
+ let bufinfo = alloc_video_buffer(vinfo, 4)?;
+ let mut buf = bufinfo.get_vbuf().unwrap();
+
+ let mut slice = if self.is_gob {
+ SliceInfo::get_default_slice(&pinfo)
+ } else {
+ bd.decode_slice_header(&pinfo)?
+ };
+ mvi.reset(self.mb_w, 0, pinfo.get_mvmode());
+ if is_b || pinfo.is_pb() {
+ mvi2.reset(self.mb_w, 0, pinfo.get_mvmode());
+ }
+ cbpi.reset(self.mb_w);
+
+ let mut blk: [[i16; 64]; 6] = [[0; 64]; 6];
+ let mut sstate = SliceState::new(pinfo.mode == Type::I);
+ let mut mb_pos = 0;
+ let apply_acpred = (pinfo.mode == Type::I) && pinfo.plusinfo.is_some() && pinfo.plusinfo.unwrap().aic;
+ if apply_acpred {
+ self.pred_coeffs.truncate(0);
+ self.pred_coeffs.resize(self.mb_w * self.mb_h, ZERO_PRED_COEFFS);
+ }
+ sstate.quant = slice.quant;
+ for mb_y in 0..self.mb_h {
+ for mb_x in 0..self.mb_w {
+ for i in 0..6 { for j in 0..64 { blk[i][j] = 0; } }
+
+ if slice.is_at_end(mb_pos) || (slice.needs_check() && mb_pos > 0 && bd.is_slice_end()) {
+ slice = bd.decode_slice_header(&pinfo)?;
+ if !self.is_gob && self.slice_reset {
+ mvi.reset(self.mb_w, mb_x, pinfo.get_mvmode());
+ if is_b || pinfo.is_pb() {
+ mvi2.reset(self.mb_w, mb_x, pinfo.get_mvmode());
+ }
+ cbpi.reset(self.mb_w);
+ sstate.reset_slice(mb_x, mb_y);
+ sstate.quant = slice.quant;
+ }
+ }
+
+ let binfo = bd.decode_block_header(&pinfo, &slice, &sstate)?;
+ let cbp = binfo.get_cbp();
+ cbpi.set_cbp(mb_x, cbp);
+ cbpi.set_q(mb_x, binfo.get_q());
+ sstate.quant = binfo.get_q();
+ if binfo.is_intra() {
+ if save_b_data {
+ self.mv_data.push(BlockMVInfo::Intra);
+ }
+ for i in 0..6 {
+ bd.decode_block_intra(&binfo, &sstate, binfo.get_q(), i, (cbp & (1 << (5 - i))) != 0, &mut blk[i])?;
+ if apply_acpred && (binfo.acpred != ACPredMode::None) {
+ let has_b = (i == 1) || (i == 3) || !sstate.first_mb;
+ let has_a = (i == 2) || (i == 3) || !sstate.first_line;
+ let (b_mb, b_blk) = if has_b {
+ if (i == 1) || (i == 3) {
+ (mb_pos, i - 1)
+ } else if i < 4 {
+ (mb_pos - 1, i + 1)
+ } else {
+ (mb_pos - 1, i)
+ }
+ } else { (0, 0) };
+ let (a_mb, a_blk) = if has_a {
+ if (i == 2) || (i == 3) {
+ (mb_pos, i - 2)
+ } else if i < 4 {
+ (mb_pos - self.mb_w, i + 2)
+ } else {
+ (mb_pos - self.mb_w, i)
+ }
+ } else { (0, 0) };
+ match binfo.acpred {
+ ACPredMode::DC => {
+ let dc;
+ if has_a && has_b {
+ dc = (self.pred_coeffs[b_mb].hor[b_blk][0] + self.pred_coeffs[a_mb].ver[a_blk][0]) / 2;
+ } else if has_a {
+ dc = self.pred_coeffs[a_mb].ver[a_blk][0];
+ } else if has_b {
+ dc = self.pred_coeffs[b_mb].hor[b_blk][0];
+ } else {
+ dc = 1024;
+ }
+ blk[i][0] = clip_dc(blk[i][0] + dc);
+ },
+ ACPredMode::Hor => {
+ if has_b {
+ for k in 0..8 {
+ blk[i][k * 8] += self.pred_coeffs[b_mb].hor[b_blk][k];
+ }
+ for k in 1..8 {
+ blk[i][k * 8] = clip_ac(blk[i][k * 8]);
+ }
+ } else {
+ blk[i][0] += 1024;
+ }
+ blk[i][0] = clip_dc(blk[i][0]);
+ },
+ ACPredMode::Ver => {
+ if has_a {
+ for k in 0..8 {
+ blk[i][k] += self.pred_coeffs[a_mb].ver[a_blk][k];
+ }
+ for k in 1..8 {
+ blk[i][k] = clip_ac(blk[i][k]);
+ }
+ } else {
+ blk[i][0] += 1024;
+ }
+ blk[i][0] = clip_dc(blk[i][0]);
+ },
+ ACPredMode::None => {},
+ };
+ for t in 0..8 { self.pred_coeffs[mb_pos].hor[i][t] = blk[i][t * 8]; }
+ for t in 0..8 { self.pred_coeffs[mb_pos].ver[i][t] = blk[i][t]; }
+ }
+ bdsp.idct(&mut blk[i]);
+ }
+ blockdsp::put_blocks(&mut buf, mb_x, mb_y, &blk);
+ mvi.set_zero_mv(mb_x);
+ if is_b {
+ mvi2.set_zero_mv(mb_x);
+ } else if pinfo.is_pb() {
+ mvi2.predict(mb_x, 0, false, binfo.get_mv2(0), sstate.first_line, sstate.first_mb);
+ }
+ } else if (binfo.mode != Type::B) && !binfo.is_skipped() {
+ if binfo.get_num_mvs() == 1 {
+ let mv = mvi.predict(mb_x, 0, false, binfo.get_mv(0), sstate.first_line, sstate.first_mb);
+ if save_b_data {
+ self.mv_data.push(BlockMVInfo::Inter_1MV(mv));
+ }
+ if let Some(ref srcbuf) = self.ipbs.get_lastref() {
+ bdsp.copy_blocks(&mut buf, srcbuf, mb_x * 16, mb_y * 16, 16, 16, mv);
+ }
+ if pinfo.is_pb() {
+ mvi2.predict(mb_x, 0, false, binfo.get_mv(0), sstate.first_line, sstate.first_mb);
+ }
+ } else {
+ let mut mv: [MV; 4] = [ZERO_MV, ZERO_MV, ZERO_MV, ZERO_MV];
+ for blk_no in 0..4 {
+ mv[blk_no] = mvi.predict(mb_x, blk_no, true, binfo.get_mv(blk_no), sstate.first_line, sstate.first_mb);
+ if let Some(ref srcbuf) = self.ipbs.get_lastref() {
+ bdsp.copy_blocks(&mut buf, srcbuf,
+ mb_x * 16 + (blk_no & 1) * 8,
+ mb_y * 16 + (blk_no & 2) * 4, 8, 8, mv[blk_no]);
+ }
+ }
+ if pinfo.is_pb() {
+ for blk_no in 0..4 {
+ mvi2.predict(mb_x, blk_no, true, binfo.get_mv(blk_no), sstate.first_line, sstate.first_mb);
+ }
+ }
+ if save_b_data {
+ self.mv_data.push(BlockMVInfo::Inter_4MV(mv));
+ }
+ }
+ for i in 0..6 {
+ bd.decode_block_inter(&binfo, &sstate, binfo.get_q(), i, ((cbp >> (5 - i)) & 1) != 0, &mut blk[i])?;
+ bdsp.idct(&mut blk[i]);
+ }
+ blockdsp::add_blocks(&mut buf, mb_x, mb_y, &blk);
+ if is_b && !pinfo.is_pb() {
+ mvi2.set_zero_mv(mb_x);
+ }
+ } else if binfo.mode != Type::B {
+ self.mv_data.push(BlockMVInfo::Inter_1MV(ZERO_MV));
+ mvi.set_zero_mv(mb_x);
+ if is_b || pinfo.is_pb() {
+ mvi2.set_zero_mv(mb_x);
+ }
+ if let Some(ref srcbuf) = self.ipbs.get_lastref() {
+ bdsp.copy_blocks(&mut buf, srcbuf, mb_x * 16, mb_y * 16, 16, 16, ZERO_MV);
+ }
+ } else {
+ let ref_mv_info = self.mv_data[mb_pos];
+ let has_fwd = binfo.get_num_mvs() > 0;
+ let has_bwd = binfo.get_num_mvs2() > 0;
+//todo refactor
+ if has_fwd || has_bwd {
+ let fwd_mv;
+ if has_fwd {
+ fwd_mv = mvi.predict(mb_x, 0, false, binfo.get_mv(0), sstate.first_line, sstate.first_mb);
+ } else {
+ fwd_mv = ZERO_MV;
+ mvi.set_zero_mv(mb_x);
+ }
+ let bwd_mv;
+ if has_bwd {
+ bwd_mv = mvi2.predict(mb_x, 0, false, binfo.get_mv2(0), sstate.first_line, sstate.first_mb);
+ } else {
+ bwd_mv = ZERO_MV;
+ mvi2.set_zero_mv(mb_x);
+ }
+ if let (Some(ref fwd_buf), Some(ref bck_buf)) = (self.ipbs.get_nextref(), self.ipbs.get_lastref()) {
+ if has_fwd && has_bwd {
+ bdsp.copy_blocks(&mut buf, fwd_buf, mb_x * 16, mb_y * 16, 16, 16, fwd_mv);
+ bdsp.avg_blocks (&mut buf, bck_buf, mb_x * 16, mb_y * 16, 16, 16, bwd_mv);
+ } else if has_fwd {
+ bdsp.copy_blocks(&mut buf, fwd_buf, mb_x * 16, mb_y * 16, 16, 16, fwd_mv);
+ } else {
+ bdsp.copy_blocks(&mut buf, bck_buf, mb_x * 16, mb_y * 16, 16, 16, bwd_mv);
+ }
+ }
+ } else {
+ if let BlockMVInfo::Inter_4MV(mvs) = ref_mv_info {
+ for blk_no in 0..4 {
+ let ref_mv = mvs[blk_no];
+ let ref_mv_fwd = ref_mv.scale(bsdiff, tsdiff);
+ let ref_mv_bwd = ref_mv - ref_mv_fwd;
+ let xoff = mb_x * 16 + (blk_no & 1) * 8;
+ let yoff = mb_y * 16 + (blk_no & 2) * 4;
+ if let (Some(ref fwd_buf), Some(ref bck_buf)) = (self.ipbs.get_nextref(), self.ipbs.get_lastref()) {
+ bdsp.copy_blocks(&mut buf, fwd_buf, xoff, yoff, 8, 8, ref_mv_fwd);
+ bdsp.avg_blocks (&mut buf, bck_buf, xoff, yoff, 8, 8, ref_mv_bwd);
+ }
+ }
+ } else {
+ let ref_mv = if let BlockMVInfo::Inter_1MV(mv_) = ref_mv_info { mv_ } else { ZERO_MV };
+ let ref_mv_fwd = ref_mv.scale(bsdiff, tsdiff);
+ let ref_mv_bwd = MV::b_sub(ref_mv, ref_mv_fwd, ZERO_MV, bsdiff, tsdiff);
+
+ if let (Some(ref fwd_buf), Some(ref bck_buf)) = (self.ipbs.get_nextref(), self.ipbs.get_lastref()) {
+ bdsp.copy_blocks(&mut buf, fwd_buf, mb_x * 16, mb_y * 16, 16, 16, ref_mv_fwd);
+ bdsp.avg_blocks (&mut buf, bck_buf, mb_x * 16, mb_y * 16, 16, 16, ref_mv_bwd);
+ }
+ }
+ mvi.set_zero_mv(mb_x);
+ mvi2.set_zero_mv(mb_x);
+ }
+ if cbp != 0 {
+ for i in 0..6 {
+ bd.decode_block_inter(&binfo, &sstate, binfo.get_q(), i, ((cbp >> (5 - i)) & 1) != 0, &mut blk[i])?;
+ bdsp.idct(&mut blk[i]);
+ }
+ blockdsp::add_blocks(&mut buf, mb_x, mb_y, &blk);
+ }
+ }
+ if pinfo.is_pb() {
+ let mut b_mb = BMB::new();
+ let cbp = binfo.get_cbp_b();
+ let bq = (((pinfo.get_pbinfo().get_dbquant() + 5) as u16) * (binfo.get_q() as u16)) >> 2;
+ let bquant;
+ if bq < 1 { bquant = 1; }
+ else if bq > 31 { bquant = 31; }
+ else { bquant = bq as u8; }
+
+ b_mb.cbp = cbp;
+ for i in 0..6 {
+ bd.decode_block_inter(&binfo, &sstate, bquant, i, (cbp & (1 << (5 - i))) != 0, &mut b_mb.blk[i])?;
+ bdsp.idct(&mut b_mb.blk[i]);
+ }
+
+ let is_fwd = binfo.is_b_fwd();
+ b_mb.fwd = is_fwd;
+ if binfo.get_num_mvs() != 4 {
+ let ref_mv = mvi2.get_mv(mb_x, 0);
+ let b_mv = if binfo.is_intra() { binfo.get_mv2(1) } else { binfo.get_mv2(0) };
+ let src_mv = if is_fwd { ZERO_MV } else { ref_mv.scale(bsdiff, tsdiff) };
+ let mv_f = MV::add_umv(src_mv, b_mv, pinfo.get_mvmode());
+ let mv_b = MV::b_sub(ref_mv, mv_f, b_mv, bsdiff, tsdiff);
+ b_mb.mv_f[0] = mv_f;
+ b_mb.mv_b[0] = mv_b;
+ b_mb.num_mv = 1;
+ } else {
+ for blk_no in 0..4 {
+ let src_mv = if is_fwd { ZERO_MV } else { mvi2.get_mv(mb_x, blk_no).scale(bsdiff, tsdiff) };
+ let mv_f = MV::add_umv(src_mv, binfo.get_mv2(0), pinfo.get_mvmode());
+ let mv_b = MV::b_sub(mvi2.get_mv(mb_x, blk_no), mv_f, binfo.get_mv2(0), bsdiff, tsdiff);
+ b_mb.mv_f[blk_no] = mv_f;
+ b_mb.mv_b[blk_no] = mv_b;
+ }
+ b_mb.num_mv = 4;
+ }
+ self.b_data.push(b_mb);
+ }
+ sstate.next_mb();
+ mb_pos += 1;
+ }
+ if let Some(plusinfo) = pinfo.plusinfo {
+ if plusinfo.deblock {
+ bdsp.filter_row(&mut buf, mb_y, self.mb_w, &cbpi);
+ }
+ }
+ mvi.update_row();
+ if is_b || pinfo.is_pb() {
+ mvi2.update_row();
+ }
+ cbpi.update_row();
+ sstate.new_row();
+ }
+
+ if pinfo.mode.is_ref() {
+ self.ipbs.add_frame(buf);
+ self.next_ts = self.last_ts;
+ self.last_ts = pinfo.ts;
+ self.tsdiff = tsdiff;
+ }
+
+ Ok(bufinfo)
+ }
+ pub fn flush(&mut self) {
+ self.ipbs.clear();
+ }
+
+ pub fn get_bframe(&mut self, bdsp: &BlockDSP) -> DecoderResult<NABufferType> {
+ if !self.has_b || self.ipbs.get_lastref().is_none() || self.ipbs.get_nextref().is_none() {
+ return Err(DecoderError::MissingReference);
+ }
+ self.has_b = false;
+
+ let fmt = formats::YUV420_FORMAT;
+ let vinfo = NAVideoInfo::new(self.w, self.h, false, fmt);
+ let bufinfo = alloc_video_buffer(vinfo, 4)?;
+ let mut b_buf = bufinfo.get_vbuf().unwrap();
+
+ if let (Some(ref bck_buf), Some(ref fwd_buf)) = (self.ipbs.get_nextref(), self.ipbs.get_lastref()) {
+ recon_b_frame(&mut b_buf, fwd_buf, bck_buf, self.mb_w, self.mb_h, self.b_data.as_slice(), bdsp);
+ }
+
+ self.b_data.truncate(0);
+ Ok(bufinfo)
+ }
+}
+
+fn recon_b_frame(b_buf: &mut NAVideoBuffer<u8>, bck_buf: &NAVideoBuffer<u8>, fwd_buf: &NAVideoBuffer<u8>,
+ mb_w: usize, mb_h: usize, b_data: &[BMB], bdsp: &BlockDSP) {
+ let mut cbpi = CBPInfo::new();
+ let mut cur_mb = 0;
+ cbpi.reset(mb_w);
+ for mb_y in 0..mb_h {
+ for mb_x in 0..mb_w {
+ let num_mv = b_data[cur_mb].num_mv;
+ let is_fwd = b_data[cur_mb].fwd;
+ let cbp = b_data[cur_mb].cbp;
+ cbpi.set_cbp(mb_x, cbp);
+ if num_mv == 1 {
+ bdsp.copy_blocks(b_buf, fwd_buf, mb_x * 16, mb_y * 16, 16, 16, b_data[cur_mb].mv_b[0]);
+ if !is_fwd {
+ bdsp.avg_blocks(b_buf, bck_buf, mb_x * 16, mb_y * 16, 16, 16, b_data[cur_mb].mv_f[0]);
+ }
+ } else {
+ for blk_no in 0..4 {
+ let xpos = mb_x * 16 + (blk_no & 1) * 8;
+ let ypos = mb_y * 16 + (blk_no & 2) * 4;
+ bdsp.copy_blocks(b_buf, fwd_buf, xpos, ypos, 8, 8, b_data[cur_mb].mv_b[blk_no]);
+ if !is_fwd {
+ bdsp.avg_blocks(b_buf, bck_buf, xpos, ypos, 8, 8, b_data[cur_mb].mv_f[blk_no]);
+ }
+ }
+ }
+ if cbp != 0 {
+ blockdsp::add_blocks(b_buf, mb_x, mb_y, &b_data[cur_mb].blk);
+ }
+ cur_mb += 1;
+ }
+ cbpi.update_row();
+ }
+}
projects / nihav.git / blobdiff