this maps to the vpxenc argument with the same name and the
VP9E_SET_MIN_GF_INTERVAL codec control
Signed-off-by: James Zern <jzern@google.com>
Reviewed-by: Vignesh Venkatasubramanian <vigneshv@google.com>
The input complex factors are constant for each iterations. This
substitudes 4 loads, 2 additions and 2 subtractions per iteration of
the inner-loop with another 4 loads. Thus effectively 4 arithmetic
operations per iteration of the inner loop are avoided, i.e. 24
operations per iteration of the outer loop, or 24 * (n - 1) operations
in total.
If the inner loop is not unrolled by the compiler, this also might
also save some pointer arithmetic as most instruction sets do not
have addressing modes with negated register offsets (12 - j). Unless
the compiler is optimising for code size, this is unlikely though.
Fixes: out of array access
Fixes: 51462/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_TIFF_fuzzer-662559341582745
Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
ff_encode_preinit() ensures that the channel layout is equivalent
to one of the channel layouts in AVCodec.ch_layout; given that
all of these channel layouts have distinct numbers of channels,
one can therefore uniquely determine the channel layout by
the number of channels.
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
This encoder has AVCodec.ch_layouts set, so ff_encode_preinit()
ensures that the used channel layout is equivalent to one of
these.
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
ff_encode_preinit() has already checked that the channel layout
is equivalent to one of the layouts in AVCodec.ch_layouts.
Reviewed-by: Paul B Mahol <onemda@gmail.com>
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
These encoders have AVCodec.ch_layouts set, so ff_encode_preinit()
has already checked that the used channel layout is equivalent
to one of these native layouts. Therefore one can simply
compare the channel masks (with the added complication
that one has to use av_channel_layout_subset() to get it,
because the channel layout is not guaranteed to have
AV_CHANNEL_ORDER_NATIVE).
Reviewed-by: Paul B Mahol <onemda@gmail.com>
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
The encoder actually creates files with side channels, not back
channels. See thd_layout in mlp_parse.h.
Reviewed-by: Paul B Mahol <onemda@gmail.com>
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
The encoders using this have AVCodec.ch_layouts set, so that
this is checked generically.
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
This encoder has AVCodec.ch_layouts set, so that this is checked
generically.
Reviewed-by: Tomas Härdin <tjoppen@acc.umu.se>
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
None of the decoders here have the AV_CODEC_CAP_CHANNEL_CONF set,
so that it is already checked generically that the number of channels
is positive.
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
The pcm_bluray encoder has AVCodec.ch_layouts set, so that
ff_encode_preinit() checks that the channel layout in use
is equivalent to one of the layouts from AVCodec.ch_layouts.
Yet equivalent is not the same as identical; in particular,
custom layouts equivalent to native layouts are possible
(and necessary if one wants to use the name/opaque fields
with an ordinary channel layout), so one must not simply
use AVChannelLayout.u.mask. Use av_channel_layout_subset()
instead.
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
This decoder does not have the AV_CODEC_CAP_CHANNEL_CONF set,
so that number of channels has to be set by the user before
avcodec_open2().
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
Now that it is ensured that the old and new channel count/layout
values coincide if the old ones are set, the consistency of the
AVChannelLayout (which is checked before we reach this point)
implies the consistency of the old values, making these checks
here dead code. So remove them.
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
This ensures that if AVCodecContext.channels or
AVCodecContext.channel_layout are set, AVCodecContext.ch_layout
has the equivalent values after this block.
(In case these values are set inconsistently, the consistency check
for ch_layout below will error out.)
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
In particular, check the provided channel layout for encoders
without AVCodec.ch_layouts set. This fixes an infinite loop
in the WavPack encoder (and maybe other issues in other encoders
as well) in case the channel count is zero.
Reviewed-by: James Almer <jamrial@gmail.com>
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
The wrapper for the legacy channel layout API already sets
AVCodecContext.channels based upon AVCodecContext.channel_layout
if the latter is set while the former is unset.
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
Possible since be95df12bb06b183c8d2aea3b0831fdf05466cf3.
Reviewed-by: Rémi Denis-Courmont <remi@remlab.net>
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
Provide optimized implementation for pix_median_abs8 function.
Performance comparison tests are shown below.
- median_sad_1_c: 277.0
- median_sad_1_neon: 82.0
Benchmarks and tests run with checkasm tool on AWS Graviton 3.
Signed-off-by: Hubert Mazur <hum@semihalf.com>
Signed-off-by: Martin Storsjö <martin@martin.st>
Provide optimized implementation for vsad8_intra function.
Performance comparison tests are shown below.
- vsad_5_c: 94.7
- vsad_5_neon: 20.7
Benchmarks and tests run with checkasm tool on AWS Graviton 3.
Signed-off-by: Hubert Mazur <hum@semihalf.com>
Signed-off-by: Martin Storsjö <martin@martin.st>
Provide optimized implementation for pix_median_abs16 function.
Performance comparison tests are shown below.
- median_sad_0_c: 720.5
- median_sad_0_neon: 127.2
Benchmarks and tests run with checkasm tool on AWS Graviton 3.
Signed-off-by: Hubert Mazur <hum@semihalf.com>
Signed-off-by: Martin Storsjö <martin@martin.st>
Old one was written with the assumption only even inputs would be given.
This very messy replacement supports even and odd inputs, and supports
AVX2 for extra speed. The buffers given are usually quite big (4k samples),
so the speedup is worth it.
The new SSE version is still faster than the old inline asm version by 33%.
Also checkasm is provided to make sure this monstrosity works.
This fixes some FATE tests.
Basically reverts af15c17daa5d8d2940c0263ba4d3ecec761c11ee.
Flipping a picture by modifying the pointers is so common
that even users of direct rendering should take it into account.
Reviewed-by: Michael Niedermayer <michael@niedermayer.cc>
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
The compiler cannot infer that the two float vectors do not alias,
causing unnecessary extra loads and serialisation. This patch caches
the two input values in local variables so that compiler can optimise
individual loop iterations.
While this probably never overflows, we are better safe than sorry.
The callback prototype should probably also use ptrdiff_t or size_t,
but I diggress (this would affect the DSP callback prototype).
Do this by setting AVCodecInternal.pad_samples.
This prevents reading into the frame's padding and writing
into the packet's padding.
This actually happened in our FATE tests (where the number of samples
is 2 mod 4), which therefore needed to be updated.
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
Some audio codecs work with atomic units that decode to a fixed
number of audio samples with this number being so small that it is
common to put multiple of these atoms into one packet. In these
cases it makes no sense to pad the last frame to the big frame_size,
so allow encoders to set the number of samples that they want
the last frame to be padded to instead.
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
In particular, check that there is only one small last frame
in case the encoder has the AV_CODEC_CAP_SMALL_LAST_FRAME set.
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
