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| author | Paul Kocialkowski <paul.kocialkowski@linux.intel.com> | 2017-07-20 18:13:36 +0300 |
|---|---|---|
| committer | Lyude <lyude@redhat.com> | 2017-07-20 13:12:08 -0400 |
| commit | 8cf32fe06c8f54bca11c485ccc1cc3899f9d81db (patch) | |
| tree | 07cdd920a0f621b1333e4bb0e63c7b83be6db55b /lib/igt_frame.h | |
| parent | c42ab4d23f4bafecf51574f538db8f5142519523 (diff) | |
lib/igt_frame: Add support for analog frame comparison testing
This adds support for analog frame comparison check, as used in VGA.
Since VGA uses a DAC-ADC chain, its data cannot be expected to be pixel
perfect. Thus, it is impossible to uses a CRC check and full frames have
to be analyzed instead. Such an analysis is implemented, based on both
an absolute error threshold and a correlation with the expected error
trend for a DAC-ADC chain. It was tested with a couple encoders and
provides reliable error detection with few false positives.
Signed-off-by: Paul Kocialkowski <paul.kocialkowski@linux.intel.com>
Reviewed-by: Lyude <lyude@redhat.com>
Diffstat (limited to 'lib/igt_frame.h')
| -rw-r--r-- | lib/igt_frame.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/lib/igt_frame.h b/lib/igt_frame.h index ec6a1643..1d9bbf6a 100644 --- a/lib/igt_frame.h +++ b/lib/igt_frame.h @@ -39,5 +39,7 @@ void igt_write_compared_frames_to_png(cairo_surface_t *reference, cairo_surface_t *capture, const char *reference_suffix, const char *capture_suffix); +bool igt_check_analog_frame_match(cairo_surface_t *reference, + cairo_surface_t *capture); #endif |