From: Wenbin Chen <wenbin.chen-at-intel.com@ffmpeg.org>
To: ffmpeg-devel@ffmpeg.org
Subject: [FFmpeg-devel] [PATCH v2 1/2] libavcodec/mpegvideo_enc: Fix a chroma mb size error in sse_mb()
Date: Mon, 4 Jul 2022 11:17:34 +0800
Message-ID: <20220704031735.2371948-1-wenbin.chen@intel.com> (raw)
For 422 frames we should not use hard coded 8 to calculate mb size for
uv plane. Chroma shift should be taken into consideration to be
compatiple with different sampling format.
The error is reported by fate test when av_cpu_max_align() return 64
on the platform supporting AVX512. This is a hidden error and it is
exposed after commit 17a59a634c39b00a680c6ebbaea58db95594d13d.
mpeg2enc has a mechanism to reuse frames. When it computes SSE (sum of
squared error) on current mb, reconstructed mb will be wrote to the
previous mb space, so that the memory can be saved. However if the align
is 64, the frame is shared in somewhere else, so the frame cannot be
reused and a new frame to store reconstrued data is created. Because the
height of mb is wrong when compute sse on 422 frame, starting from the
second line of macro block, changed data is read when frame is reused
(we need to read row 16 rather than row 8 if frame is 422), and unchanged
data is read when frame is not reused (a new frame is created so the
original frame will not be changed).
That is why commit 17a59a634c39b00a680c6ebbaea58db95594d13d exposes this
issue, because it add av_cpu_max_align() and this function return 64 on
platform supporting AVX512 which lead to creating a frame in mpeg2enc,
and this lead to the different outputs.
Signed-off-by: Wenbin Chen <wenbin.chen@intel.com>
---
libavcodec/mpegvideo_enc.c | 20 +++++++++----
tests/ref/seek/vsynth_lena-mpeg2-422 | 40 +++++++++++++-------------
tests/ref/vsynth/vsynth1-mpeg2-422 | 8 +++---
tests/ref/vsynth/vsynth2-mpeg2-422 | 8 +++---
tests/ref/vsynth/vsynth3-mpeg2-422 | 8 +++---
tests/ref/vsynth/vsynth_lena-mpeg2-422 | 8 +++---
6 files changed, 50 insertions(+), 42 deletions(-)
diff --git a/libavcodec/mpegvideo_enc.c b/libavcodec/mpegvideo_enc.c
index d6a85a037a..970f71fe37 100644
--- a/libavcodec/mpegvideo_enc.c
+++ b/libavcodec/mpegvideo_enc.c
@@ -2558,6 +2558,8 @@ static int sse(MpegEncContext *s, uint8_t *src1, uint8_t *src2, int w, int h, in
static int sse_mb(MpegEncContext *s){
int w= 16;
int h= 16;
+ int chroma_mb_w = w >> s->chroma_x_shift;
+ int chroma_mb_h = h >> s->chroma_y_shift;
if(s->mb_x*16 + 16 > s->width ) w= s->width - s->mb_x*16;
if(s->mb_y*16 + 16 > s->height) h= s->height- s->mb_y*16;
@@ -2565,17 +2567,23 @@ static int sse_mb(MpegEncContext *s){
if(w==16 && h==16)
if(s->avctx->mb_cmp == FF_CMP_NSSE){
return s->mecc.nsse[0](s, s->new_picture->data[0] + s->mb_x * 16 + s->mb_y * s->linesize * 16, s->dest[0], s->linesize, 16) +
- s->mecc.nsse[1](s, s->new_picture->data[1] + s->mb_x * 8 + s->mb_y * s->uvlinesize * 8, s->dest[1], s->uvlinesize, 8) +
- s->mecc.nsse[1](s, s->new_picture->data[2] + s->mb_x * 8 + s->mb_y * s->uvlinesize * 8, s->dest[2], s->uvlinesize, 8);
+ s->mecc.nsse[1](s, s->new_picture->data[1] + s->mb_x * chroma_mb_w + s->mb_y * s->uvlinesize * chroma_mb_h,
+ s->dest[1], s->uvlinesize, chroma_mb_h) +
+ s->mecc.nsse[1](s, s->new_picture->data[2] + s->mb_x * chroma_mb_w + s->mb_y * s->uvlinesize * chroma_mb_h,
+ s->dest[2], s->uvlinesize, chroma_mb_h);
}else{
return s->mecc.sse[0](NULL, s->new_picture->data[0] + s->mb_x * 16 + s->mb_y * s->linesize * 16, s->dest[0], s->linesize, 16) +
- s->mecc.sse[1](NULL, s->new_picture->data[1] + s->mb_x * 8 + s->mb_y * s->uvlinesize * 8, s->dest[1], s->uvlinesize, 8) +
- s->mecc.sse[1](NULL, s->new_picture->data[2] + s->mb_x * 8 + s->mb_y * s->uvlinesize * 8, s->dest[2], s->uvlinesize, 8);
+ s->mecc.sse[1](NULL, s->new_picture->data[1] + s->mb_x * chroma_mb_w + s->mb_y * s->uvlinesize * chroma_mb_h,
+ s->dest[1], s->uvlinesize, chroma_mb_h) +
+ s->mecc.sse[1](NULL, s->new_picture->data[2] + s->mb_x * chroma_mb_w + s->mb_y * s->uvlinesize * chroma_mb_h,
+ s->dest[2], s->uvlinesize, chroma_mb_h);
}
else
return sse(s, s->new_picture->data[0] + s->mb_x*16 + s->mb_y*s->linesize*16, s->dest[0], w, h, s->linesize)
- +sse(s, s->new_picture->data[1] + s->mb_x*8 + s->mb_y*s->uvlinesize*8,s->dest[1], w>>1, h>>1, s->uvlinesize)
- +sse(s, s->new_picture->data[2] + s->mb_x*8 + s->mb_y*s->uvlinesize*8,s->dest[2], w>>1, h>>1, s->uvlinesize);
+ +sse(s, s->new_picture->data[1] + s->mb_x * chroma_mb_w + s->mb_y * s->uvlinesize * chroma_mb_h,
+ s->dest[1], w >> s->chroma_x_shift, h >> s->chroma_y_shift, s->uvlinesize)
+ +sse(s, s->new_picture->data[2] + s->mb_x * chroma_mb_w + s->mb_y * s->uvlinesize * chroma_mb_h,
+ s->dest[2], w >> s->chroma_x_shift, h >> s->chroma_y_shift, s->uvlinesize);
}
static int pre_estimate_motion_thread(AVCodecContext *c, void *arg){
diff --git a/tests/ref/seek/vsynth_lena-mpeg2-422 b/tests/ref/seek/vsynth_lena-mpeg2-422
index 06d8f7ac3a..1fc2bf93a0 100644
--- a/tests/ref/seek/vsynth_lena-mpeg2-422
+++ b/tests/ref/seek/vsynth_lena-mpeg2-422
@@ -1,46 +1,46 @@
-ret: 0 st: 0 flags:1 dts: 0.000000 pts: NOPTS pos: 0 size: 17497
+ret: 0 st: 0 flags:1 dts: 0.000000 pts: NOPTS pos: 0 size: 18339
ret: 0 st:-1 flags:0 ts:-1.000000
-ret: 0 st: 0 flags:1 dts: 0.000000 pts: NOPTS pos: 0 size: 17497
+ret: 0 st: 0 flags:1 dts: 0.000000 pts: NOPTS pos: 0 size: 18339
ret: 0 st:-1 flags:1 ts: 1.894167
-ret: 0 st: 0 flags:1 dts: 1.840000 pts: NOPTS pos: 325397 size: 19967
+ret: 0 st: 0 flags:1 dts: 1.840000 pts: NOPTS pos: 329242 size: 21479
ret: 0 st: 0 flags:0 ts: 0.788334
-ret: 0 st: 0 flags:1 dts: 0.880000 pts: NOPTS pos: 200747 size: 22575
+ret: 0 st: 0 flags:1 dts: 0.880000 pts: NOPTS pos: 203086 size: 24774
ret:-1 st: 0 flags:1 ts:-0.317499
ret:-1 st:-1 flags:0 ts: 2.576668
ret: 0 st:-1 flags:1 ts: 1.470835
-ret: 0 st: 0 flags:1 dts: 1.360000 pts: NOPTS pos: 265466 size: 21329
+ret: 0 st: 0 flags:1 dts: 1.360000 pts: NOPTS pos: 268154 size: 22845
ret: 0 st: 0 flags:0 ts: 0.365002
-ret: 0 st: 0 flags:1 dts: 0.400000 pts: NOPTS pos: 104454 size: 28984
+ret: 0 st: 0 flags:1 dts: 0.400000 pts: NOPTS pos: 108763 size: 32204
ret:-1 st: 0 flags:1 ts:-0.740831
ret:-1 st:-1 flags:0 ts: 2.153336
ret: 0 st:-1 flags:1 ts: 1.047503
-ret: 0 st: 0 flags:1 dts: 0.880000 pts: NOPTS pos: 200747 size: 22575
+ret: 0 st: 0 flags:1 dts: 0.880000 pts: NOPTS pos: 203086 size: 24774
ret: 0 st: 0 flags:0 ts:-0.058330
-ret: 0 st: 0 flags:1 dts: 0.000000 pts: NOPTS pos: 0 size: 17497
+ret: 0 st: 0 flags:1 dts: 0.000000 pts: NOPTS pos: 0 size: 18339
ret: 0 st: 0 flags:1 ts: 2.835837
-ret: 0 st: 0 flags:1 dts: 1.840000 pts: NOPTS pos: 325397 size: 19967
+ret: 0 st: 0 flags:1 dts: 1.840000 pts: NOPTS pos: 329242 size: 21479
ret: 0 st:-1 flags:0 ts: 1.730004
-ret: 0 st: 0 flags:1 dts: 1.840000 pts: NOPTS pos: 325397 size: 19967
+ret: 0 st: 0 flags:1 dts: 1.840000 pts: NOPTS pos: 329242 size: 21479
ret: 0 st:-1 flags:1 ts: 0.624171
-ret: 0 st: 0 flags:1 dts: 0.400000 pts: NOPTS pos: 104454 size: 28984
+ret: 0 st: 0 flags:1 dts: 0.400000 pts: NOPTS pos: 108763 size: 32204
ret: 0 st: 0 flags:0 ts:-0.481662
-ret: 0 st: 0 flags:1 dts: 0.000000 pts: NOPTS pos: 0 size: 17497
+ret: 0 st: 0 flags:1 dts: 0.000000 pts: NOPTS pos: 0 size: 18339
ret: 0 st: 0 flags:1 ts: 2.412505
-ret: 0 st: 0 flags:1 dts: 1.840000 pts: NOPTS pos: 325397 size: 19967
+ret: 0 st: 0 flags:1 dts: 1.840000 pts: NOPTS pos: 329242 size: 21479
ret: 0 st:-1 flags:0 ts: 1.306672
-ret: 0 st: 0 flags:1 dts: 1.360000 pts: NOPTS pos: 265466 size: 21329
+ret: 0 st: 0 flags:1 dts: 1.360000 pts: NOPTS pos: 268154 size: 22845
ret: 0 st:-1 flags:1 ts: 0.200839
-ret: 0 st: 0 flags:1 dts: 0.000000 pts: NOPTS pos: 0 size: 17497
+ret: 0 st: 0 flags:1 dts: 0.000000 pts: NOPTS pos: 0 size: 18339
ret: 0 st: 0 flags:0 ts:-0.904994
-ret: 0 st: 0 flags:1 dts: 0.000000 pts: NOPTS pos: 0 size: 17497
+ret: 0 st: 0 flags:1 dts: 0.000000 pts: NOPTS pos: 0 size: 18339
ret: 0 st: 0 flags:1 ts: 1.989173
-ret: 0 st: 0 flags:1 dts: 1.840000 pts: NOPTS pos: 325397 size: 19967
+ret: 0 st: 0 flags:1 dts: 1.840000 pts: NOPTS pos: 329242 size: 21479
ret: 0 st:-1 flags:0 ts: 0.883340
-ret: 0 st: 0 flags:1 dts: 1.360000 pts: NOPTS pos: 265466 size: 21329
+ret: 0 st: 0 flags:1 dts: 1.360000 pts: NOPTS pos: 268154 size: 22845
ret:-1 st:-1 flags:1 ts:-0.222493
ret:-1 st: 0 flags:0 ts: 2.671674
ret: 0 st: 0 flags:1 ts: 1.565841
-ret: 0 st: 0 flags:1 dts: 1.360000 pts: NOPTS pos: 265466 size: 21329
+ret: 0 st: 0 flags:1 dts: 1.360000 pts: NOPTS pos: 268154 size: 22845
ret: 0 st:-1 flags:0 ts: 0.460008
-ret: 0 st: 0 flags:1 dts: 0.880000 pts: NOPTS pos: 200747 size: 22575
+ret: 0 st: 0 flags:1 dts: 0.880000 pts: NOPTS pos: 203086 size: 24774
ret:-1 st:-1 flags:1 ts:-0.645825
diff --git a/tests/ref/vsynth/vsynth1-mpeg2-422 b/tests/ref/vsynth/vsynth1-mpeg2-422
index e936ba463e..a39b2b4dce 100644
--- a/tests/ref/vsynth/vsynth1-mpeg2-422
+++ b/tests/ref/vsynth/vsynth1-mpeg2-422
@@ -1,4 +1,4 @@
-6e135a1a27235a320311a932147846b4 *tests/data/fate/vsynth1-mpeg2-422.mpeg2video
-730780 tests/data/fate/vsynth1-mpeg2-422.mpeg2video
-0273cd8463d1fc115378748239951560 *tests/data/fate/vsynth1-mpeg2-422.out.rawvideo
-stddev: 10.27 PSNR: 27.90 MAXDIFF: 162 bytes: 7603200/ 7603200
+651f054730be04257498eeae08b3bdc5 *tests/data/fate/vsynth1-mpeg2-422.mpeg2video
+855859 tests/data/fate/vsynth1-mpeg2-422.mpeg2video
+10fd55dbd10b08f9271eb89617766be8 *tests/data/fate/vsynth1-mpeg2-422.out.rawvideo
+stddev: 9.38 PSNR: 28.68 MAXDIFF: 178 bytes: 7603200/ 7603200
diff --git a/tests/ref/vsynth/vsynth2-mpeg2-422 b/tests/ref/vsynth/vsynth2-mpeg2-422
index ec7244f9f9..5da29b4eac 100644
--- a/tests/ref/vsynth/vsynth2-mpeg2-422
+++ b/tests/ref/vsynth/vsynth2-mpeg2-422
@@ -1,4 +1,4 @@
-b2fa9b73c3547191ecc01b8163abd4e5 *tests/data/fate/vsynth2-mpeg2-422.mpeg2video
-379164 tests/data/fate/vsynth2-mpeg2-422.mpeg2video
-704f6a96f93c2409219bd48b74169041 *tests/data/fate/vsynth2-mpeg2-422.out.rawvideo
-stddev: 4.17 PSNR: 35.73 MAXDIFF: 70 bytes: 7603200/ 7603200
+fcaf6242ca4b706d392e40d9631e3465 *tests/data/fate/vsynth2-mpeg2-422.mpeg2video
+383946 tests/data/fate/vsynth2-mpeg2-422.mpeg2video
+474bb259f041bfb971691551f678fd09 *tests/data/fate/vsynth2-mpeg2-422.out.rawvideo
+stddev: 3.93 PSNR: 36.23 MAXDIFF: 69 bytes: 7603200/ 7603200
diff --git a/tests/ref/vsynth/vsynth3-mpeg2-422 b/tests/ref/vsynth/vsynth3-mpeg2-422
index 2247f286e6..e83c23635c 100644
--- a/tests/ref/vsynth/vsynth3-mpeg2-422
+++ b/tests/ref/vsynth/vsynth3-mpeg2-422
@@ -1,4 +1,4 @@
-4d108b861715f1fa010fd70baea91793 *tests/data/fate/vsynth3-mpeg2-422.mpeg2video
-68612 tests/data/fate/vsynth3-mpeg2-422.mpeg2video
-73b16e906d07b6bbccf4b00d4a25302c *tests/data/fate/vsynth3-mpeg2-422.out.rawvideo
-stddev: 4.02 PSNR: 36.05 MAXDIFF: 46 bytes: 86700/ 86700
+96dc854fc40a6410d4edc387b63ded1a *tests/data/fate/vsynth3-mpeg2-422.mpeg2video
+75445 tests/data/fate/vsynth3-mpeg2-422.mpeg2video
+5337fc0bfb789919cb3325a02d48eb82 *tests/data/fate/vsynth3-mpeg2-422.out.rawvideo
+stddev: 3.24 PSNR: 37.90 MAXDIFF: 27 bytes: 86700/ 86700
diff --git a/tests/ref/vsynth/vsynth_lena-mpeg2-422 b/tests/ref/vsynth/vsynth_lena-mpeg2-422
index 5f11d4e7cd..85d598782c 100644
--- a/tests/ref/vsynth/vsynth_lena-mpeg2-422
+++ b/tests/ref/vsynth/vsynth_lena-mpeg2-422
@@ -1,4 +1,4 @@
-521ec92c0b8672011a43dd13db98c400 *tests/data/fate/vsynth_lena-mpeg2-422.mpeg2video
-356431 tests/data/fate/vsynth_lena-mpeg2-422.mpeg2video
-51ca353620f85db8b5b1c56f1a275add *tests/data/fate/vsynth_lena-mpeg2-422.out.rawvideo
-stddev: 3.15 PSNR: 38.14 MAXDIFF: 49 bytes: 7603200/ 7603200
+87e5c69775b363db649c253050536045 *tests/data/fate/vsynth_lena-mpeg2-422.mpeg2video
+361341 tests/data/fate/vsynth_lena-mpeg2-422.mpeg2video
+93cefcf101e6d0814acfaa626a02be90 *tests/data/fate/vsynth_lena-mpeg2-422.out.rawvideo
+stddev: 2.97 PSNR: 38.67 MAXDIFF: 57 bytes: 7603200/ 7603200
--
2.32.0
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next reply other threads:[~2022-07-04 3:22 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-07-04 3:17 Wenbin Chen [this message]
2022-07-04 3:17 ` [FFmpeg-devel] [PATCH v2 2/2] libavcodec/mpegvideo_enc: Unify the code style Wenbin Chen
2022-07-09 19:04 ` [FFmpeg-devel] [PATCH v2 1/2] libavcodec/mpegvideo_enc: Fix a chroma mb size error in sse_mb() Marton Balint
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