The previous check only caught sizes from -AV_INPUT_BUFFER_PADDING_SIZE
to -1.
This fixes ubsan runtime error: signed integer overflow: 2147483647 + 32
cannot be represented in type 'int'
Signed-off-by: Andreas Cadhalpun <Andreas.Cadhalpun@googlemail.com>
Signed-off-by: Anton Khirnov <anton@khirnov.net>
The previous check only caught sizes from -AV_INPUT_BUFFER_PADDING_SIZE
to -1.
This fixes ubsan runtime error: signed integer overflow: 2147483647 + 32
cannot be represented in type 'int'
Reviewed-by: Michael Niedermayer <michael@niedermayer.cc>
Signed-off-by: Andreas Cadhalpun <Andreas.Cadhalpun@googlemail.com>
Note that convergence_duration had another meaning, one which was in
practice never used. The only real use for it was a 64 bit replacement
for the duration field. It's better just to make duration 64 bits, and
to get rid of it.
Signed-off-by: Vittorio Giovara <vittorio.giovara@gmail.com>
The stats are a superset of the quality factor, also allowing the picture type and encoder "PSNR" stats to be exported
This also replaces the native by fixed little endian order for the affected side data
AV_PKT_DATA_QUALITY_FACTOR is left as a synonym of AV_PKT_DATA_QUALITY_STATS
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
Side data count is incremented by by calling av_packet_new_side_data()
in the following loop, setting it explicitly results in the resulting
value being twice what it should be.
CC: libav-stable@libav.org
This code changes the input packet, which is read only and can in
rare circumstances lead to decoder errors. (i run into one of these in
the audio decoder, which corrupted the packet during av_find_stream_info()
so that actual decoding that single packet failed later)
Until a better fix is implemented, this commit limits the problem.
A better fix might be to make the subtitle decoders not depend on
data[size] = 0 or to copy their input when this is not the case.
These functions are intended for use with side_data which comes in an
AVPacket.
Signed-off-by: Ben Boeckel <mathstuf@gmail.com>
Reviewed-by: wm4
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
Previously the wrong buffer pointer was checked, when buf
instead of *buf was checked. But checking the return value
instead is even better.
Reported-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
CC: libav-stable@libav.org
Signed-off-by: Martin Storsjö <martin@martin.st>
Fixing av_packet_copy_side_data to work correctly when source and
destination are the same. This makes sure that there is no memory
leak and double frees.
Signed-off by: Vignesh Venkatasubramanian <vigneshv@google.com>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
The padding data is assumed to be 0 in several places, notably in
subtitles. This problem was not detected with fate-sub-srt test because
the first element of the side data (x1) is 0 in the test, so the
trailing side data present in the packet wasn't read by the decoder. The
issue can be observed with a large enough x1.
It is also noted in FF_INPUT_BUFFER_PADDING_SIZE doxy that MPEG
bitstreams require that padding with 0, so it might fix other issues.
Refactoring copy_side_data into a separate function so that it can be called
in cases where side data needs to be duplicated.
Signed-off-by: Vignesh Venkatasubramanian <vigneshv@google.com>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
Freeing it in av_destruct_packet(), as is done currently, would mean
that we allow it to be allocated with other means. But that would make
av_packet_new_side_data() unsafe.
Side data is not expected to be large, so copying it if required
shouldn't be a problem.
Andreas Cadhalpun
Anton Khirnov
Hendrik Leppkes
Luca Barbato
wm4
Vittorio Giovara
Michael Niedermayer
Michael Niedermayer
Roman Fietze
Ben Boeckel
Martin Storsjö
Vignesh Venkatasubramanian
Diego Biurrun
Clément Bœsch
Janne Grunau
Andrey Utkin
Mans Rullgard