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avcodec/vvcdec: support mv wraparound

A 360 video specific tool see https://ieeexplore.ieee.org/stamp/stamp.jsp?arnumber=9503377 passed files: DMVR_A_Huawei_3.bit WRAP_D_InterDigital_4.bit WRAP_A_InterDigital_4.bit WRAP_B_InterDigital_4.bit WRAP_C_InterDigital_4.bit ERP_A_MediaTek_3.bit

Nuo Mi committed 2 years ago

Commit f68f4071 parent 68517402 files · +87 −10Browse files

Showing the changes to libavcodec (1 of 2 files). Show all

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libavcodec/vvc/inter.c+79−2
@@ -95,20 +95,97 @@ static void emulated_edge_no_wrap(const VVCLocalContext *lc, uint8_t *dst, · 94 unmodified lines
9595 }
9696 }
9797
98+static void emulated_half(const VVCLocalContext *lc, uint8_t *dst, const ptrdiff_t dst_stride,
99+ const uint8_t *src, const ptrdiff_t src_stride, const int ps,
100+ int x_off, int y_off, const int block_w, const int block_h,
101+ const VVCRect *subpic,const VVCRect *half_sb, const int dmvr_clip)
102+{
103+ const VVCFrameContext *fc = lc->fc;
104+ int pic_width, pic_height;
105+
106+ src += y_off * src_stride + x_off * (1 << ps);
107+
108+ clip_to_subpic(&x_off, &y_off, &pic_width, &pic_height, subpic, half_sb, dmvr_clip);
109+
110+ fc->vdsp.emulated_edge_mc(dst, src, dst_stride, src_stride,
111+ block_w, block_h, x_off, y_off, pic_width, pic_height);
112+}
113+
114+static void sb_set_lr(VVCRect *sb, const int l, const int r)
115+{
116+ sb->l = l;
117+ sb->r = r;
118+}
119+
120+static void sb_wrap(VVCRect *sb, const int wrap)
121+{
122+ sb_set_lr(sb, sb->l + wrap, sb->r + wrap);
123+}
124+
98125 static void emulated_edge(const VVCLocalContext *lc, uint8_t *dst,
99126 const uint8_t **src, ptrdiff_t *src_stride, const VVCFrame *src_frame,
100127 int x_sb, int y_sb, int x_off, int y_off, int block_w, int block_h, const int wrap_enabled,
101128 const int is_chroma, const int extra_before, const int extra_after)
102129 {
130+ const VVCSPS *sps = src_frame->sps;
131+ const VVCPPS *pps = src_frame->pps;
132+ const int ps = sps->pixel_shift;
103133 const int subpic_idx = lc->sc->sh.r->curr_subpic_idx;
134+ const int extra = extra_before + extra_after;
104135 const int dmvr_clip = x_sb != x_off || y_sb != y_off;
136+ const int dmvr_left = FFMAX(x_off, x_sb) - extra_before;
137+ const int dmvr_right = FFMIN(x_off, x_sb) + block_w + extra_after;
138+ const int left = x_off - extra_before;
139+ const int top = y_off - extra_before;
140+ const int pic_width = pps->width >> sps->hshift[is_chroma];
141+ const int wrap = pps->ref_wraparound_offset << (sps->min_cb_log2_size_y - sps->hshift[is_chroma]);
142+ const ptrdiff_t dst_stride = EDGE_EMU_BUFFER_STRIDE << ps;
105143 VVCRect sb = { x_sb - extra_before, y_sb - extra_before, x_sb + block_w + extra_after, y_sb + block_h + extra_after };
106144 VVCRect subpic;
107145
108146 subpic_get_rect(&subpic, src_frame, subpic_idx, is_chroma);
109147
110− return emulated_edge_no_wrap(lc, dst, src, src_stride,
111− x_off, y_off, block_w, block_h, extra_before, extra_after, &subpic, &sb, dmvr_clip);
148+ if (!wrap_enabled || (dmvr_left >= 0 && dmvr_right <= pic_width)) {
149+ return emulated_edge_no_wrap(lc, dst, src, src_stride,
150+ x_off, y_off, block_w, block_h, extra_before, extra_after, &subpic, &sb, dmvr_clip);
151+ }
152+ if (dmvr_right <= 0) {
153+ sb_wrap(&sb, wrap);
154+ return emulated_edge_no_wrap(lc, dst, src, src_stride,
155+ x_off + wrap, y_off, block_w, block_h, extra_before, extra_after, &subpic, &sb, dmvr_clip);
156+ }
157+ if (dmvr_left >= pic_width) {
158+ sb_wrap(&sb, -wrap);
159+ return emulated_edge_no_wrap(lc, dst, src, src_stride,
160+ x_off - wrap, y_off, block_w, block_h, extra_before, extra_after, &subpic, &sb, dmvr_clip);
161+ }
162+
163+ block_w += extra;
164+ block_h += extra;
165+
166+ // half block are wrapped
167+ if (dmvr_left < 0 ) {
168+ const int w = -left;
169+ VVCRect half_sb = { sb.l + wrap, sb.t, 0 + wrap, sb.b };
170+ emulated_half(lc, dst, dst_stride, *src, *src_stride, ps,
171+ left + wrap, top, w, block_h, &subpic, &half_sb, dmvr_clip);
172+
173+ sb_set_lr(&half_sb, 0, sb.r);
174+ emulated_half(lc, dst + (w << ps), dst_stride, *src, *src_stride, ps,
175+ 0, top, block_w - w, block_h, &subpic, &half_sb, dmvr_clip);
176+ } else {
177+ const int w = pic_width - left;
178+ VVCRect half_sb = { sb.l, sb.t, pic_width, sb.b };
179+ emulated_half(lc, dst, dst_stride, *src, *src_stride, ps,
180+ left, top, w, block_h, &subpic, &half_sb, dmvr_clip);
181+
182+ sb_set_lr(&half_sb, pic_width - wrap, sb.r - wrap);
183+ emulated_half(lc, dst + (w << ps), dst_stride, *src, *src_stride, ps,
184+ pic_width - wrap , top, block_w - w, block_h, &subpic, &half_sb, dmvr_clip);
185+ }
186+
187+ *src = dst + extra_before * dst_stride + (extra_before << ps);
188+ *src_stride = dst_stride;
112189 }
113190
114191 #define MC_EMULATED_EDGE(dst, src, src_stride, x_off, y_off) \

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