This fixes the hypothetical case of rounding errors causing
incorrect values to be used.
We do not use *_EPSILON, because non trivial expressions can contain
errors larger than that making a zero equality test with *_EPSILON
unreliable.
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
Its the width in bytes and not the linesize or stride.
This makes the naming more consistent with the rest of the codebase
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This reverts commit 51dab60c7b.
this fixed nothing, and was just the result of assuming that the
variable named linesize was the linesize. Its not, its the width
in bytes which was already correct.
Found-by: durandal_1707
Fixes Ticket2896
An alternative to this would be to change the code to support any
stride.
The condition of differing strides should be rare.
If theres no speedloss supporting any stride would be better
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
The pixel format tables are never modified, mark them as constant.
Signed-off-by: Diego Elio Pettenò <flameeyes@flameeyes.eu>
Signed-off-by: Luca Barbato <lu_zero@gentoo.org>
* commit 'cb8f70c96e14c1b4824ef23d21d78d10fc5a4b93':
vf_fps: use double constants for default/min/max for start_time
Conflicts:
libavfilter/vf_fps.c
Merged-by: Michael Niedermayer <michaelni@gmx.at>
When using AV_NOPTS_VALUE (which expands to INT64_C(0x8000000000000000))
as union initializer for a double field, the c99 converter needs to
interpret this constant when filling the union initializer, and it is
interpreted as a positive value.
When converting AV_NOPTS_VALUE to a double, MSVC 2010 ends up with
the same positive value as the c99 converter, while MSVC 2012 gets
a negative value.
This results in an infite loop in various FATE tests on MSVC 2012.
Signed-off-by: Martin Storsjö <martin@martin.st>
c99wrap choked on initialization of .dbl start_time option with
AV_NOPTS_VALUE: Unable to parse int64_t as expression primary
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
* commit '3799376dd3373ee255651ed542c75b15665801a8':
lavfi/fifo: fix flushing when using request_samples
Conflicts:
libavfilter/fifo.c
Merged-by: Michael Niedermayer <michaelni@gmx.at>
* commit '77cc958f60f73963be4281d6e82ef81707e40c26':
lavfi: add const to the AVFilter parameter of avfilter_graph_create_filter()
Merged-by: Michael Niedermayer <michaelni@gmx.at>
* commit '7950e519bb094897f957b9a9531cc60ba46cbc91':
Disable deprecation warnings for cases where a replacement is available
Conflicts:
libavcodec/avpacket.c
libavcodec/pthread.c
libavcodec/utils.c
libavdevice/v4l2.c
libavfilter/avfiltergraph.c
libavfilter/buffersrc.c
Merged-by: Michael Niedermayer <michaelni@gmx.at>
* commit 'b5a138652ff8a5b987d3e1191e67fd9f6575527e':
Give less generic names to global library option arrays
Conflicts:
libavcodec/options_table.h
libavfilter/avfilter.c
libavformat/options_table.h
libswscale/options.c
Merged-by: Michael Niedermayer <michaelni@gmx.at>
* commit '0e8c6f221a8ddb7dfb3c9e9bd0b33cb12e9391b8':
avisynth: Fix a "AVISynth" vs. "AviSynth" struct name typo
Conflicts:
doc/general.texi
libavformat/avisynth.c
Merged-by: Michael Niedermayer <michaelni@gmx.at>
Previously it was partly only added to central functions called
internally, however if GCC would inline these into the public fuction, the
alignment attribute would not take effect.
Instead, add it to all public entry points to avoid these problems.
Signed-off-by: Martin Storsjö <martin@martin.st>
Previously it was partly only added to central functions called
internally, however if GCC would inline these into the public fuction, the
alignment attribute would not take effect.
Instead, add it to all public entry points to avoid these problems.
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This prevents the unneeded insertion of multiple aresample filters in some cases
The format merging is moved to avoid having to call the channel layout
merge twice. The channel layout merge code uses different structures and
is not compatible with the added dry run wrappers.
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
Prior to this it was possible that format reduction was ended
before it fully propagated leading to failure later in picking
formats.
No testcase with unmodified source exists, the case was reproduced
with less aggressive list merging though.
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
Fix "Value 0.000000 for parameter 'srch' out of range"
error message when source or destination height is 1.
Note: since the av_opt_set_int() calls are not checked for
failure and the interlaced scalers are not actually used,
this error has no consequence apart from a frightening message
in the log.
* qatar/master:
Consistently use "cpu_flags" as variable/parameter name for CPU flags
Conflicts:
libavcodec/x86/dsputil_init.c
libavcodec/x86/h264dsp_init.c
libavcodec/x86/hpeldsp_init.c
libavcodec/x86/motion_est.c
libavcodec/x86/mpegvideo.c
libavcodec/x86/proresdsp_init.c
Merged-by: Michael Niedermayer <michaelni@gmx.at>
Coverity complains about a possible sign extension issue in
apply_delogo(). While it is extremely unlikely to happen, it is easy
to fix so let's just do that. Using unsigned variables even makes the
binary code smaller.
Fixes Coverity CID 1046439.
Signed-off-by: Jean Delvare <khali@linux-fr.org>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This is a hotfix to fix -t / -ss
a different solution might be choosen later, i just dont want to leave
this broken
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
* qatar/master:
vf_interlace: better handling of odd video size
Conflicts:
libavfilter/vf_interlace.c
Merged-by: Michael Niedermayer <michaelni@gmx.at>
We need at least one pixel around the logo to use as known points to
interpolate from. So properly declare the band/t attribute has having
a minimum value of 1.
Signed-off-by: Jean Delvare <khali@linux-fr.org>
Reviewed-by: Stefano Sabatini <stefasab@gmail.com>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
Options "show" and "band" are unrelated and should thus be
independent. However, setting "show" to 1 currently resets "band" to
its default value of 4. While this is documented, this still
surprising and confusing IMHO.
Change this behavior and make "show" and "band" independent from each
other. Update the documentation accordingly.
Signed-off-by: Jean Delvare <khali@linux-fr.org>
Reviewed-by: Stefano Sabatini <stefasab@gmail.com>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
The left and right samples are the same for the whole line, so store
their values and don't recompute them for every iteration of "y".
This simple optimization results in a speed improvement between 15%
and 20% in my tests (depending on the logo geometry.)
Result is obviously the same.
Signed-off-by: Jean Delvare <khali@linux-fr.org>
Reviewed-by: Stefano Sabatini <stefasab@gmail.com>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
The top left hand corner pixel coordinates are already stored in
logo_x1 and logo_y1 so don't recompute each of them 6 times for every
iteration.
This is a simple code optimization, result is obviously the same. The
performance gain is small (about 2% in my tests) but still good to
have, and the new code is clearer.
Signed-off-by: Jean Delvare <khali@linux-fr.org>
Reviewed-by; Stefano Sabatini <stefasab@gmail.com>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
When operating on subsampled chroma planes, some rounding is taking
place. The left and top borders are rounded down while the width and
height are rounded up, so all rounding is done outward to guarantee the
logo area is fully covered.
The problem is that the width and height are counted from the
unrounded left and top borders, respectively. So if the left or top
border position has indeed been rounded down, and the width or height
needs no rounding (up), the position of the the right or bottom border
will be effectively rounded down, i.e. inward.
The issue can easily be seen with a yuv240p input and
-vf delogo=45:45:60:40:show=1 -vframes 1 delogo-bug.png
(or virtually any logo area with odd x and y and even width and
height.) The right and bottom chroma borders (in green) are clearly
off.
In order to fix this, the width and height must be adjusted to include
the bits lost in the rounding of the left and top border positions,
respectively, prior to being themselves rounded up.
Signed-off-by: Jean Delvare <khali@linux-fr.org>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
When interpolating, weights are based on relative distances, which
assume square pixels. If a non-1:1 sample aspect ratio is used, it
should be taken into account when comparing distances, because the
human eye and brain care about the picture as it is displayed, not
stored.
Signed-off-by: Jean Delvare <khali@linux-fr.org>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
Add function avfilter_graph_parse_ptr() and favor it in place of
avfilter_graph_parse(), which will be restored with the old/Libav
signature at the next bump.
If HAVE_INCOMPATIBLE_LIBAV_API is enabled it will use the
Libav-compatible signature for avfilter_graph_parse().
At the next major bump the current implementation of
avfilter_graph_parse() should be dropped in favor of the Libav/old
implementation.
Should address trac ticket #2672.
The original delogo algorithm interpolates both horizontally and
vertically and uses the average to compute the resulting sample. This
works reasonably well when the logo area is almost square. However
when the logo area is significantly larger than high or higher than
large, the result is largely suboptimal.
The issue can be clearly seen by testing the delogo filter with a fake
logo area that is 200 pixels large and 2 pixels high. Vertical
interpolation gives a very good result in that case, horizontal
interpolation gives a very bad result, and the overall result is poor,
because both are given the same weight.
Even when the logo is roughly square, the current algorithm gives poor
results on the borders of the logo area, because it always gives
horizontal and vertical interpolations an equal weight, and this is
suboptimal on borders. For example, in the middle of the left hand
side border of the logo, you want to trust the left known point much
more than the right known point (which the current algorithm already
does) but also much more than the top and bottom known points (which
the current algorithm doesn't do.)
By properly weighting each known point when computing the value of
each interpolated pixel, the visual result is much better, especially
on borders and/or for high or large logo areas.
The algorithm I implemented guarantees that the weight of each of the
4 known points directly depends on its distance to the interpolated
point. It is largely inspired from the original algorithm, the key
difference being that it computes the relative weights globally
instead of separating the vertical and horizontal interpolations and
combining them afterward.
Signed-off-by: Jean Delvare <khali@linux-fr.org>
Signed-off-by: Stefano Sabatini <stefasab@gmail.com>
* 'drawbox_exprs' of https://github.com/mjmvisser/FFmpeg:
enabled expressions on x, y, w, h and t parameters for drawgrid and drawbox, added examples
Reviewed-by: Andrey Utkin
Merged-by: Michael Niedermayer <michaelni@gmx.at>
* commit 'eeeb5c291d3f78eaade5b99c2614c7cab0e9be79':
vsrc_movie: do not free avoption variables in uninit()
Conflicts:
libavfilter/src_movie.c
Merged-by: Michael Niedermayer <michaelni@gmx.at>
The algorithm works on src and writes to dst, not the other way
around.
Signed-off-by: Jean Delvare <khali@linux-fr.org>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
