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yadif: redesign first and last 2 lines handling.

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The previous code dependent on the input buffer matching the
buffer that has been provided by yadifs get_buffer.
The API does in now way gurantee this though its often true.
This fixes some out of array reads.
The regression test checksums change due to "out of picture" values
being initialized differently.
There should be no visual difference in the filters output

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
pull/28/head
Michael Niedermayer 12 years ago
parent 9f088a1ed4
commit 2f7e8dcf45
4 changed files with 64 additions and 36 deletions
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  1. 28
      libavfilter/vf_yadif.c
  2. 2
      libavfilter/yadif.h
  3. 26
      tests/ref/fate/filter-yadif-mode0
  4. 44
      tests/ref/fate/filter-yadif-mode1

28
libavfilter/vf_yadif.c
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@ -112,6 +112,7 @@ static void filter(AVFilterContext *ctx, AVFilterBufferRef *dstpic,
int w = dstpic->video->w;
int h = dstpic->video->h;
int refs = yadif->cur->linesize[i];
int absrefs = FFABS(refs);
int df = (yadif->csp->comp[i].depth_minus1 + 8) / 8;
if (i == 1 || i == 2) {
@ -120,6 +121,12 @@ static void filter(AVFilterContext *ctx, AVFilterBufferRef *dstpic,
h >>= yadif->csp->log2_chroma_h;
}
if(yadif->temp_line_size < absrefs) {
av_free(yadif->temp_line);
yadif->temp_line = av_mallocz(2*64 + 5*absrefs);
yadif->temp_line_size = absrefs;
}
for (y = 0; y < h; y++) {
if ((y ^ parity) & 1) {
uint8_t *prev = &yadif->prev->data[i][y*refs];
@ -127,7 +134,25 @@ static void filter(AVFilterContext *ctx, AVFilterBufferRef *dstpic,
uint8_t *next = &yadif->next->data[i][y*refs];
uint8_t *dst = &dstpic->data[i][y*dstpic->linesize[i]];
int mode = y==1 || y+2==h ? 2 : yadif->mode;
yadif->filter_line(dst, prev, cur, next, w, y+1<h ? refs : -refs, y ? -refs : refs, parity ^ tff, mode);
int prefs = y+1<h ? refs : -refs;
int mrefs = y ?-refs : refs;
if(y<=1 || y+2>=h) {
int j;
uint8_t *tmp = yadif->temp_line + 64 + 2*absrefs;
if(mode<2)
memcpy(tmp+2*mrefs, cur+2*mrefs, w*df);
memcpy(tmp+mrefs, cur+mrefs, w*df);
memcpy(tmp , cur , w*df);
if(prefs != mrefs) {
memcpy(tmp+prefs, cur+prefs, w*df);
if(mode<2)
memcpy(tmp+2*prefs, cur+2*prefs, w*df);
}
cur = tmp;
}
yadif->filter_line(dst, prev, cur, next, w, prefs, mrefs, parity ^ tff, mode);
} else {
memcpy(&dstpic->data[i][y*dstpic->linesize[i]],
&yadif->cur->data[i][y*refs], w*df);
@ -343,6 +368,7 @@ static av_cold void uninit(AVFilterContext *ctx)
if (yadif->prev) avfilter_unref_bufferp(&yadif->prev);
if (yadif->cur ) avfilter_unref_bufferp(&yadif->cur );
if (yadif->next) avfilter_unref_bufferp(&yadif->next);
av_freep(&yadif->temp_line); yadif->temp_line_size = 0;
}
static int query_formats(AVFilterContext *ctx)

2
libavfilter/yadif.h
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@ -56,6 +56,8 @@ typedef struct {
const AVPixFmtDescriptor *csp;
int eof;
uint8_t *temp_line;
int temp_line_size;
} YADIFContext;
void ff_yadif_init_x86(YADIFContext *yadif);

26
tests/ref/fate/filter-yadif-mode0
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@ -2,31 +2,31 @@
0, 9, 9, 1, 622080, 0x4440caef
0, 10, 10, 1, 622080, 0xce67e69d
0, 11, 11, 1, 622080, 0x1dbdc653
0, 12, 12, 1, 622080, 0x82c591d1
0, 12, 12, 1, 622080, 0x55c791d0
0, 13, 13, 1, 622080, 0x8193740b
0, 14, 14, 1, 622080, 0xcb219711
0, 15, 15, 1, 622080, 0x1870783b
0, 14, 14, 1, 622080, 0x7125970f
0, 15, 15, 1, 622080, 0xeb63783a
0, 16, 16, 1, 622080, 0x7080590b
0, 17, 17, 1, 622080, 0x6df4175d
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0, 17, 17, 1, 622080, 0x13f8175b
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0, 19, 19, 1, 622080, 0x7f9d66f7
0, 20, 20, 1, 622080, 0x338cda81
0, 21, 21, 1, 622080, 0xb13797f8
0, 22, 22, 1, 622080, 0xb51e7ca4
0, 20, 20, 1, 622080, 0x068eda80
0, 21, 21, 1, 622080, 0x843997f7
0, 22, 22, 1, 622080, 0x88207ca3
0, 23, 23, 1, 622080, 0x353eed75
0, 24, 24, 1, 622080, 0xf93e92b0
0, 25, 25, 1, 622080, 0xd0811094
0, 26, 26, 1, 622080, 0xb04a3141
0, 27, 27, 1, 622080, 0x4ab84909
0, 28, 28, 1, 622080, 0xa0fcb8fb
0, 29, 29, 1, 622080, 0x9003aebb
0, 28, 28, 1, 622080, 0x4700b8f9
0, 29, 29, 1, 622080, 0x6305aeba
0, 30, 30, 1, 622080, 0x153faa3e
0, 31, 31, 1, 622080, 0xae724063
0, 32, 32, 1, 622080, 0xeb4de77a
0, 32, 32, 1, 622080, 0xbe4fe779
0, 33, 33, 1, 622080, 0x209ed8c7
0, 34, 34, 1, 622080, 0xe2bbac96
0, 35, 35, 1, 622080, 0xe945441e
0, 36, 36, 1, 622080, 0x8f8cbd5f
0, 37, 37, 1, 622080, 0xbc3cf717
0, 36, 36, 1, 622080, 0x3590bd5d
0, 37, 37, 1, 622080, 0x8f3ef716
0, 38, 38, 1, 622080, 0x0109f125
0, 39, 39, 1, 622080, 0x230c373f

44
tests/ref/fate/filter-yadif-mode1
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@ -5,27 +5,27 @@
0, 21, 21, 1, 622080, 0x9a57891f
0, 22, 22, 1, 622080, 0x1dbdc653
0, 23, 23, 1, 622080, 0xc171c0c5
0, 24, 24, 1, 622080, 0x82c591d1
0, 24, 24, 1, 622080, 0x55c791d0
0, 25, 25, 1, 622080, 0x20db9890
0, 26, 26, 1, 622080, 0x8193740b
0, 27, 27, 1, 622080, 0xdb181d52
0, 28, 28, 1, 622080, 0xcb219711
0, 28, 28, 1, 622080, 0x7125970f
0, 29, 29, 1, 622080, 0xc2b913d1
0, 30, 30, 1, 622080, 0x1870783b
0, 30, 30, 1, 622080, 0xeb63783a
0, 31, 31, 1, 622080, 0xf1d9c5fb
0, 32, 32, 1, 622080, 0x7080590b
0, 33, 33, 1, 622080, 0x669c5775
0, 34, 34, 1, 622080, 0x6df4175d
0, 33, 33, 1, 622080, 0xeda55774
0, 34, 34, 1, 622080, 0x13f8175b
0, 35, 35, 1, 622080, 0x01921a16
0, 36, 36, 1, 622080, 0x6b530e95
0, 36, 36, 1, 622080, 0x3e550e94
0, 37, 37, 1, 622080, 0xd5047bc9
0, 38, 38, 1, 622080, 0x7f9d66f7
0, 39, 39, 1, 622080, 0xa8b006eb
0, 40, 40, 1, 622080, 0x338cda81
0, 39, 39, 1, 622080, 0x2fc806ea
0, 40, 40, 1, 622080, 0x068eda80
0, 41, 41, 1, 622080, 0xf0e125a7
0, 42, 42, 1, 622080, 0xb13797f8
0, 42, 42, 1, 622080, 0x843997f7
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0, 44, 44, 1, 622080, 0xb51e7ca4
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0, 45, 45, 1, 622080, 0x637fcbfe
0, 46, 46, 1, 622080, 0x353eed75
0, 47, 47, 1, 622080, 0xd9a8f5ac
@ -34,30 +34,30 @@
0, 50, 50, 1, 622080, 0xd0811094
0, 51, 51, 1, 622080, 0x3039906f
0, 52, 52, 1, 622080, 0xb04a3141
0, 53, 53, 1, 622080, 0x52872cf9
0, 53, 53, 1, 622080, 0xe62d2cfa
0, 54, 54, 1, 622080, 0x4ab84909
0, 55, 55, 1, 622080, 0x82de12ee
0, 56, 56, 1, 622080, 0xa0fcb8fb
0, 56, 56, 1, 622080, 0x4700b8f9
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0, 58, 58, 1, 622080, 0x9003aebb
0, 59, 59, 1, 622080, 0xffe6f770
0, 58, 58, 1, 622080, 0x6305aeba
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0, 60, 60, 1, 622080, 0x153faa3e
0, 61, 61, 1, 622080, 0xb67f3233
0, 62, 62, 1, 622080, 0xae724063
0, 63, 63, 1, 622080, 0x15fe44b4
0, 64, 64, 1, 622080, 0xeb4de77a
0, 63, 63, 1, 622080, 0xed2b44b3
0, 64, 64, 1, 622080, 0xbe4fe779
0, 65, 65, 1, 622080, 0x380f8563
0, 66, 66, 1, 622080, 0x209ed8c7
0, 67, 67, 1, 622080, 0xb964d70f
0, 68, 68, 1, 622080, 0xe2bbac96
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0, 70, 70, 1, 622080, 0xe945441e
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0, 72, 72, 1, 622080, 0x8f8cbd5f
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0, 78, 78, 1, 622080, 0x230c373f
0, 79, 79, 1, 622080, 0x82dfb1f2
0, 79, 79, 1, 622080, 0x5a1ab1f1

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