If a JNI environment is not already attached to the thread where the
MediaCodec calls are made the current implementation will attach /
detach an environment for each MediaCodec call wasting some CPU time.

ff_jni_get_env replaces ff_jni_{attach,detach} by permanently attaching
an environment (if it is not already the case) to the current thread.
The environment will be automatically detached at the thread destruction
using a pthread_key callback.

Saves around 5% of CPU time (out of 20%) while decoding a stream with
MediaCodec.

This fixes trac issue #5417.

This is cherry-picked from libav commit
d825b1a5.
Signed-off-by: Martin Storsjö <martin@martin.st>

This is cherrypicked from libav, from commits
82b75251 and
d0b1e604.
Signed-off-by: Martin Storsjö <martin@martin.st>

Fixes checkasm failures on mmxext functions
Signed-off-by: James Almer <jamrial@gmail.com>

Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>

The macros were moved to compat/dispatch_semaphore/semaphore.h after a libav merge, and were never removed from jack.c

Each takes about 0.1% of runtime in my profiles, and they didn't have
any SIMD yet so far (we only had simd for npx=16 double-block versions).

Each takes about 0.5% of runtime in my profiles, and they didn't have
any SIMD yet so far (we only had simd for npx=16 double-block versions).

About 1.8x speedup compared to AVX version for full IDCT. Other
sub-IDCT scenarios also see speedups. Full --bench output for
idct_32x32_add_{bpp}_${subidct}_${opt} (50k cycles):

nop: 16.5
vp9_inv_dct_dct_32x32_add_8_1_c: 2284.4
vp9_inv_dct_dct_32x32_add_8_1_sse2: 145.0
vp9_inv_dct_dct_32x32_add_8_1_ssse3: 137.4
vp9_inv_dct_dct_32x32_add_8_1_avx: 137.1
vp9_inv_dct_dct_32x32_add_8_1_avx2: 73.2
vp9_inv_dct_dct_32x32_add_8_2_c: 14680.8
vp9_inv_dct_dct_32x32_add_8_2_sse2: 2617.2
vp9_inv_dct_dct_32x32_add_8_2_ssse3: 982.9
vp9_inv_dct_dct_32x32_add_8_2_avx: 958.5
vp9_inv_dct_dct_32x32_add_8_2_avx2: 704.2
vp9_inv_dct_dct_32x32_add_8_4_c: 14443.1
vp9_inv_dct_dct_32x32_add_8_4_sse2: 2717.1
vp9_inv_dct_dct_32x32_add_8_4_ssse3: 965.7
vp9_inv_dct_dct_32x32_add_8_4_avx: 1000.7
vp9_inv_dct_dct_32x32_add_8_4_avx2: 717.1
vp9_inv_dct_dct_32x32_add_8_8_c: 14436.4
vp9_inv_dct_dct_32x32_add_8_8_sse2: 2671.8
vp9_inv_dct_dct_32x32_add_8_8_ssse3: 1038.5
vp9_inv_dct_dct_32x32_add_8_8_avx: 983.0
vp9_inv_dct_dct_32x32_add_8_8_avx2: 729.4
vp9_inv_dct_dct_32x32_add_8_16_c: 14614.7
vp9_inv_dct_dct_32x32_add_8_16_sse2: 2701.7
vp9_inv_dct_dct_32x32_add_8_16_ssse3: 1334.4
vp9_inv_dct_dct_32x32_add_8_16_avx: 1276.7
vp9_inv_dct_dct_32x32_add_8_16_avx2: 719.5
vp9_inv_dct_dct_32x32_add_8_32_c: 14363.6
vp9_inv_dct_dct_32x32_add_8_32_sse2: 2575.6
vp9_inv_dct_dct_32x32_add_8_32_ssse3: 2633.9
vp9_inv_dct_dct_32x32_add_8_32_avx: 2539.6
vp9_inv_dct_dct_32x32_add_8_32_avx2: 1395.0

Spotted-by: James Almer <jamrial@gmail.com>

The exit condition was missing.
Signed-off-by: Timothy Gu <timothygu99@gmail.com>

Commit 5d48e4ea accidentally reverted changes
made to matroskaenc by commit 989a614b.
Signed-off-by: James Almer <jamrial@gmail.com>

ffprobe did not show tags with only '-show_entries programs'
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>

The accessors are needed only from outside libavutil.
Reviewed-by: Michael Niedermayer <michael@niedermayer.cc>
Signed-off-by: James Almer <jamrial@gmail.com>

Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>

This fixes crash in avformat_open_input() when accessing
protocol_whitelist field.
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>

It's a small and simple function that can be inlined.

This removes one private symbol and should reduce object dependencies with the next
major bump
Signed-off-by: James Almer <jamrial@gmail.com>

This reverts commit 2adbea4e.

A better solution will follow in the next commit.

Regression since 0bf5fd2e

lavc/movenc rely on avpriv_dnxhd_parse_header_prefix declared by
dnxhddata.h since e47981da.

Fixes a missing symbol error in lavc/movenc if the dnxhd encoder is not
enabled.

This reverts commit d30cf57a, reversing changes made to
acc155ac. The commit d30cf57a
provided irrelevant code complexity and decoding slowdown. But the main disadvantage of this
commit is a decoder crash. So it should be reverted.
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>

added sws_flags flags and tested against x86_32
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>

This is needed in order to have different sizes of LUTs according to the
input.

This simplifies following commits.

There is actually a need for the origin and end point not to be defined.
We can not automatically insert them with the y value of the first and
last point as it will influence the curves in a wrong way.

Fixes #5397

tests/fate/filter-audio: fate-filter-chorus: Randomly change parameters to some values which pass on arm/mips/x86-32/64

If this still doesnt give the same results on all platforms then this should be
disabled
Found-by: James Almer <jamrial@gmail.com>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>

Fix const corectness and zero init the struct. This example code would actually crash when initializing string.
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>

This ensures that AV_NOPTS_VALUE value is handled
correctly.
Reviewed-by: Nicolas George <george@nsup.org>
Signed-off-by: Jan Sebechlebsky <sebechlebskyjan@gmail.com>
Signed-off-by: Marton Balint <cus@passwd.hu>

Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>