This avoids per codec checks for channels not being 0
Fixes: division by 0
Fixes: 25419/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_FASTAUDIO_fuzzer-5632544761184256
Fixes: 25433/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_FASTAUDIO_fuzzer-6215671900536832
Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Suggested-by: Paul B Mahol <onemda@gmail.com>
See: [FFmpeg-devel] [PATCH 1/3] avcodec/fastaudio: Check channel
Reviewed-by: Paul B Mahol <onemda@gmail.com>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
They add considerable complexity to frame-threading implementation,
which includes an unavoidably leaking error path, while the advantages
of this option to the users are highly dubious.
It should be always possible and desirable for the callers to make their
get_buffer2() implementation thread-safe, so deprecate this option.
Fixes: signed integer overflow: -4683718486770919638 * 2 cannot be represented in type 'long'
Fixes: 26704/clusterfuzz-testcase-minimized-ffmpeg_dem_MPC8_fuzzer-6327056939614208
Fixes: 27550/clusterfuzz-testcase-minimized-ffmpeg_dem_MPC8_fuzzer-6259212652642304
Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
Fixes: left shift of 65536 by 15 places cannot be represented in type 'int'
Fixes: 26801/clusterfuzz-testcase-minimized-ffmpeg_dem_MPC8_fuzzer-5164313092030464
Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
The FLAC muxer currently stores an attached picture corresponding to an
AVStream in AVStream.priv_data. The AVPacket contained therein is
unreferenced after it has been written. The AVPacket structure itself is
then freed generically as AVStream.priv_data.
And this can lead to memleaks if an attached picture is not written:
It might be because the trailer is never written or because writing
a previous attached picture failed in case error_recognition is set
to explode.
Therefore free the packets properly (i.e. with av_packet_free())
in the muxer's deinit function.
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@gmail.com>
These two extensions and two features are both optionally used by
libplacebo to speed up rendering, so it makes sense for libavutil to
automatically enable them as well.
Vulkan formats with a PACK suffix define native endianess.
Vulkan formats without a PACK suffix are in bytestream order.
Pixel formats with a LE/BE suffix define endianess.
Pixel formats without LE/BE suffix are in bytestream order.
This relies on the fact that host memory is always going to be required
to be aligned to the platform's page size, which means we can adjust
the pointers when we map them to buffers and therefore skip an entire
copy. This has already had extensive testing in libplacebo without
problems, so its safe to use here as well.
Speeds up downloads and uploads on platforms which do not pool their
memory hugely, but less so on platforms that do.
We can pool the buffers ourselves, but that can come as a later patch
if necessary.
Allows us to uninit cleanly.
This assert was also somewhat pointless as we assert every other
function, so another assert would be triggered long before this
one is.
This patch is relatively straightforward with one exception:
the decoder option flag.
The option was introduced to troubleshoot but its existence is conflicting
and redundant now that we have a codec-generic flag.
Hence this patch deprecates it.
The way it interacts with AV_CODEC_EXPORT_DATA_FILM_GRAIN is as follows:
If filmgrain is unset and AV_CODEC_EXPORT_DATA_FILM_GRAIN is
present, disable film grain application and export side data.
If filmgrain is set to 0, disable film grain and export side data.
If filmgrain is set to 1, apply film grain but export side data if
the AV_CODEC_EXPORT_DATA_FILM_GRAIN flag is set. This may result in
double film grain application, but the user has requested it by setting
both.
This patch introduces a new frame side data type AVFilmGrainParams for use
with video codecs which support it.
It can save a lot of memory used for duplicate processed reference frames and
reduce copies when applying film grain during presentation.
The MPEG-1/2 encoders initialize several tables once during the first
time one of the encoders is initialized; the table for MPEG-2 intra VLC
lengths is only initialized if it is used for this encoder instance.
This implies that if the first MPEG-1/2 encoder to be initialized does
not use it, it will never be initialized even if a later encoder
instance makes use of them. Fix this by initializing this table
unconditionally.
Reviewed-by: Michael Niedermayer <michael@niedermayer.cc>
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@gmail.com>
