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Merge commit '64ed397635ef2666b0ca0c8d8c60a8bc44581d82'

* commit '64ed397635ef2666b0ca0c8d8c60a8bc44581d82':
vf_yadif: fix out-of line reads

Conflicts:
libavfilter/vf_yadif.c
tests/ref/fate/filter-yadif-mode0
tests/ref/fate/filter-yadif-mode1

Merged-by: Michael Niedermayer <michaelni@gmx.at>

Michael Niedermayer authored on 2013/02/16 17:03:58
Showing 5 changed files
... ...
@@ -34,15 +34,15 @@
34 34
 #define PERM_RWP AV_PERM_WRITE | AV_PERM_PRESERVE | AV_PERM_REUSE
35 35
 
36 36
 #define CHECK(j)\
37
-    {   int score = FFABS(cur[mrefs-1+(j)] - cur[prefs-1-(j)])\
37
+    {   int score = FFABS(cur[mrefs + off_left + (j)] - cur[prefs + off_left - (j)])\
38 38
                   + FFABS(cur[mrefs  +(j)] - cur[prefs  -(j)])\
39
-                  + FFABS(cur[mrefs+1+(j)] - cur[prefs+1-(j)]);\
39
+                  + FFABS(cur[mrefs + off_right + (j)] - cur[prefs + off_right - (j)]);\
40 40
         if (score < spatial_score) {\
41 41
             spatial_score= score;\
42 42
             spatial_pred= (cur[mrefs  +(j)] + cur[prefs  -(j)])>>1;\
43 43
 
44
-#define FILTER \
45
-    for (x = 0;  x < w; x++) { \
44
+#define FILTER(start, end) \
45
+    for (x = start;  x < end; x++) { \
46 46
         int c = cur[mrefs]; \
47 47
         int d = (prev2[0] + next2[0])>>1; \
48 48
         int e = cur[prefs]; \
... ...
@@ -51,11 +51,15 @@
51 51
         int temporal_diff2 =(FFABS(next[mrefs] - c) + FFABS(next[prefs] - e) )>>1; \
52 52
         int diff = FFMAX3(temporal_diff0 >> 1, temporal_diff1, temporal_diff2); \
53 53
         int spatial_pred = (c+e) >> 1; \
54
-        int spatial_score = FFABS(cur[mrefs - 1] - cur[prefs - 1]) + FFABS(c-e) \
55
-                          + FFABS(cur[mrefs + 1] - cur[prefs + 1]) - 1; \
54
+        int off_right = (x < w - 1) ? 1 : -1;\
55
+        int off_left  = x ? -1 : 1;\
56
+        int spatial_score = FFABS(cur[mrefs + off_left]  - cur[prefs + off_left]) + FFABS(c-e) \
57
+                          + FFABS(cur[mrefs + off_right] - cur[prefs + off_right]) - 1; \
56 58
  \
57
-        CHECK(-1) CHECK(-2) }} }} \
58
-        CHECK( 1) CHECK( 2) }} }} \
59
+        if (x > 2 && x < w - 3) {\
60
+            CHECK(-1) CHECK(-2) }} }} \
61
+            CHECK( 1) CHECK( 2) }} }} \
62
+        }\
59 63
  \
60 64
         if (mode < 2) { \
61 65
             int b = (prev2[2 * mrefs] + next2[2 * mrefs])>>1; \
... ...
@@ -93,9 +97,34 @@ static void filter_line_c(void *dst1,
93 93
     uint8_t *prev2 = parity ? prev : cur ;
94 94
     uint8_t *next2 = parity ? cur  : next;
95 95
 
96
-    FILTER
96
+    FILTER(0, w)
97 97
 }
98 98
 
99
+static void filter_edges(void *dst1, void *prev1, void *cur1, void *next1,
100
+                         int w, int prefs, int mrefs, int parity, int mode,
101
+                         int l_edge)
102
+{
103
+    uint8_t *dst  = dst1;
104
+    uint8_t *prev = prev1;
105
+    uint8_t *cur  = cur1;
106
+    uint8_t *next = next1;
107
+    int x;
108
+    uint8_t *prev2 = parity ? prev : cur ;
109
+    uint8_t *next2 = parity ? cur  : next;
110
+
111
+    FILTER(0, l_edge)
112
+
113
+    dst  = (uint8_t*)dst1  + w - 3;
114
+    prev = (uint8_t*)prev1 + w - 3;
115
+    cur  = (uint8_t*)cur1  + w - 3;
116
+    next = (uint8_t*)next1 + w - 3;
117
+    prev2 = (uint8_t*)(parity ? prev : cur);
118
+    next2 = (uint8_t*)(parity ? cur  : next);
119
+
120
+    FILTER(w - 3, w)
121
+}
122
+
123
+
99 124
 static void filter_line_c_16bit(void *dst1,
100 125
                                 void *prev1, void *cur1, void *next1,
101 126
                                 int w, int prefs, int mrefs, int parity,
... ...
@@ -111,7 +140,31 @@ static void filter_line_c_16bit(void *dst1,
111 111
     mrefs /= 2;
112 112
     prefs /= 2;
113 113
 
114
-    FILTER
114
+    FILTER(0, w)
115
+}
116
+
117
+static void filter_edges_16bit(void *dst1, void *prev1, void *cur1, void *next1,
118
+                               int w, int prefs, int mrefs, int parity, int mode,
119
+                               int l_edge)
120
+{
121
+    uint16_t *dst  = dst1;
122
+    uint16_t *prev = prev1;
123
+    uint16_t *cur  = cur1;
124
+    uint16_t *next = next1;
125
+    int x;
126
+    uint16_t *prev2 = parity ? prev : cur ;
127
+    uint16_t *next2 = parity ? cur  : next;
128
+
129
+    FILTER(0, l_edge)
130
+
131
+    dst   = (uint16_t*)dst1  + w - 3;
132
+    prev  = (uint16_t*)prev1 + w - 3;
133
+    cur   = (uint16_t*)cur1  + w - 3;
134
+    next  = (uint16_t*)next1 + w - 3;
135
+    prev2 = (uint16_t*)(parity ? prev : cur);
136
+    next2 = (uint16_t*)(parity ? cur  : next);
137
+
138
+    FILTER(w - 3, w)
115 139
 }
116 140
 
117 141
 static void filter(AVFilterContext *ctx, AVFilterBufferRef *dstpic,
... ...
@@ -126,6 +179,7 @@ static void filter(AVFilterContext *ctx, AVFilterBufferRef *dstpic,
126 126
         int refs = yadif->cur->linesize[i];
127 127
         int absrefs = FFABS(refs);
128 128
         int df = (yadif->csp->comp[i].depth_minus1 + 8) / 8;
129
+        int l_edge, l_edge_pix;
129 130
 
130 131
         if (i == 1 || i == 2) {
131 132
         /* Why is this not part of the per-plane description thing? */
... ...
@@ -133,11 +187,11 @@ static void filter(AVFilterContext *ctx, AVFilterBufferRef *dstpic,
133 133
             h >>= yadif->csp->log2_chroma_h;
134 134
         }
135 135
 
136
-        if(yadif->temp_line_size < absrefs) {
137
-            av_free(yadif->temp_line);
138
-            yadif->temp_line = av_mallocz(2*64 + 5*absrefs);
139
-            yadif->temp_line_size = absrefs;
140
-        }
136
+        /* filtering reads 3 pixels to the left/right; to avoid invalid reads,
137
+         * we need to call the c variant which avoids this for border pixels
138
+         */
139
+        l_edge     = yadif->req_align;
140
+        l_edge_pix = l_edge / df;
141 141
 
142 142
         for (y = 0; y < h; y++) {
143 143
             if ((y ^ parity) & 1) {
... ...
@@ -146,26 +200,22 @@ static void filter(AVFilterContext *ctx, AVFilterBufferRef *dstpic,
146 146
                 uint8_t *next = &yadif->next->data[i][y * refs];
147 147
                 uint8_t *dst  = &dstpic->data[i][y * dstpic->linesize[i]];
148 148
                 int     mode  = y == 1 || y + 2 == h ? 2 : yadif->mode;
149
-                int     prefs = y+1<h ? refs : -refs;
150
-                int     mrefs =     y ?-refs :  refs;
151
-
152
-                if(y<=1 || y+2>=h) {
153
-                    uint8_t *tmp = yadif->temp_line + 64 + 2*absrefs;
154
-                    if(mode<2)
155
-                        memcpy(tmp+2*mrefs, cur+2*mrefs, w*df);
156
-                    memcpy(tmp+mrefs, cur+mrefs, w*df);
157
-                    memcpy(tmp      , cur      , w*df);
158
-                    if(prefs != mrefs) {
159
-                        memcpy(tmp+prefs, cur+prefs, w*df);
160
-                        if(mode<2)
161
-                            memcpy(tmp+2*prefs, cur+2*prefs, w*df);
162
-                    }
163
-                    cur = tmp;
149
+                if (yadif->req_align) {
150
+                    yadif->filter_line(dst + l_edge, prev + l_edge, cur + l_edge,
151
+                                       next + l_edge, w - l_edge_pix - 3,
152
+                                       y + 1 < h ? refs : -refs,
153
+                                       y ? -refs : refs,
154
+                                       parity ^ tff, mode);
155
+                    yadif->filter_edges(dst, prev, cur, next, w,
156
+                                         y + 1 < h ? refs : -refs,
157
+                                         y ? -refs : refs,
158
+                                         parity ^ tff, mode, l_edge_pix);
159
+                } else {
160
+                    yadif->filter_line(dst, prev, cur, next + l_edge, w,
161
+                                       y + 1 < h ? refs : -refs,
162
+                                       y ? -refs : refs,
163
+                                       parity ^ tff, mode);
164 164
                 }
165
-
166
-                yadif->filter_line(dst, prev, cur, next, w,
167
-                                   prefs, mrefs,
168
-                                   parity ^ tff, mode);
169 165
             } else {
170 166
                 memcpy(&dstpic->data[i][y * dstpic->linesize[i]],
171 167
                        &yadif->cur->data[i][y * refs], w * df);
... ...
@@ -333,7 +383,6 @@ static av_cold void uninit(AVFilterContext *ctx)
333 333
     avfilter_unref_bufferp(&yadif->prev);
334 334
     avfilter_unref_bufferp(&yadif->cur );
335 335
     avfilter_unref_bufferp(&yadif->next);
336
-    av_freep(&yadif->temp_line); yadif->temp_line_size = 0;
337 336
     av_opt_free(yadif);
338 337
 }
339 338
 
... ...
@@ -416,9 +465,11 @@ static int config_props(AVFilterLink *link)
416 416
 
417 417
     s->csp = av_pix_fmt_desc_get(link->format);
418 418
     if (s->csp->comp[0].depth_minus1 / 8 == 1) {
419
-        s->filter_line = filter_line_c_16bit;
419
+        s->filter_line  = filter_line_c_16bit;
420
+        s->filter_edges = filter_edges_16bit;
420 421
     } else {
421
-        s->filter_line = filter_line_c;
422
+        s->filter_line  = filter_line_c;
423
+        s->filter_edges = filter_edges;
422 424
 
423 425
         if (ARCH_X86)
424 426
             ff_yadif_init_x86(s);
... ...
@@ -42,12 +42,18 @@ av_cold void ff_yadif_init_x86(YADIFContext *yadif)
42 42
 
43 43
 #if HAVE_YASM
44 44
 #if ARCH_X86_32
45
-    if (EXTERNAL_MMXEXT(cpu_flags))
45
+    if (EXTERNAL_MMXEXT(cpu_flags)) {
46 46
         yadif->filter_line = ff_yadif_filter_line_mmxext;
47
+        yadif->req_align   = 8;
48
+    }
47 49
 #endif /* ARCH_X86_32 */
48
-    if (EXTERNAL_SSE2(cpu_flags))
50
+    if (EXTERNAL_SSE2(cpu_flags)) {
49 51
         yadif->filter_line = ff_yadif_filter_line_sse2;
50
-    if (EXTERNAL_SSSE3(cpu_flags))
52
+        yadif->req_align   = 16;
53
+    }
54
+    if (EXTERNAL_SSSE3(cpu_flags)) {
51 55
         yadif->filter_line = ff_yadif_filter_line_ssse3;
56
+        yadif->req_align   = 16;
57
+    }
52 58
 #endif /* HAVE_YASM */
53 59
 }
... ...
@@ -53,9 +53,17 @@ typedef struct YADIFContext {
53 53
     AVFilterBufferRef *next;
54 54
     AVFilterBufferRef *prev;
55 55
     AVFilterBufferRef *out;
56
+
57
+    /**
58
+     * Required alignment for filter_line
59
+     */
60
+    int req_align;
56 61
     void (*filter_line)(void *dst,
57 62
                         void *prev, void *cur, void *next,
58 63
                         int w, int prefs, int mrefs, int parity, int mode);
64
+    void (*filter_edges)(void *dst, void *prev, void *cur, void *next,
65
+                         int w, int prefs, int mrefs, int parity, int mode,
66
+                         int l_edge);
59 67
 
60 68
     const AVPixFmtDescriptor *csp;
61 69
     int eof;
... ...
@@ -1,32 +1,32 @@
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... ...
@@ -1,63 +1,63 @@
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