[FFmpeg-devel] avfilter/vf_interlace : add checkasm for lowpass_line and AVX2 version

[Martin Vignali]

Hello,

In attach patch to add a checkasm test, for lowpass_line (8 and 16)
and AVX2 version for lowpass_line (8 and 16)


001 : Modify init part of vf_interlace (add ff_interlace_init
and modify ff_interlace_init_x86)

002 : Checkasm test for lowpass_line
can be test with
./tests/checkasm/checkasm --test=vf_interlace --bench
or
make fate-checkasm

003 : AVX2 version for lowpass_line (8 and 16)


For the checkasm test, i add an align test (related to ticket 6491)
but i only "unalign" the "mref value" (if i unalign src in this test, i
have a crash)
I can't find a "real" filter command line who reproduce the same crash
(if someone have a command line example for that, i will modify the
checkasm and the asm)

Checkasm result : (in my tests the AVX version is always slower, than SSE
version (not sure it's interested to keep AVX version)

./tests/checkasm/checkasm --test=vf_interlace --bench

benchmarking with native FFmpeg timers
nop: 36.2
checkasm: using random seed 1323076929
SSE2:
 - vf_interlace.lowpass_line_8  [OK]
 - vf_interlace.lowpass_line_16 [OK]
AVX:
 - vf_interlace.lowpass_line_8  [OK]
 - vf_interlace.lowpass_line_16 [OK]
AVX2:
 - vf_interlace.lowpass_line_8  [OK]
 - vf_interlace.lowpass_line_16 [OK]
checkasm: all 6 tests passed
lowpass_line_8_c: 311.2
lowpass_line_8_sse2: 44.4
lowpass_line_8_avx: 46.9
lowpass_line_8_avx2: 26.7
lowpass_line_16_c: 182.9
lowpass_line_16_sse2: 44.4
lowpass_line_16_avx: 48.4
lowpass_line_16_avx2: 28.2


Martin
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