Partial port of the ARM Neon for aarch64.

Benchmarks from fate:

benchmarking with Linux Perf Monitoring API
nop: 58.6
checkasm: using random seed 1760970128
NEON:
 - vp8dsp.idct       [OK]
 - vp8dsp.mc         [OK]
 - vp8dsp.loopfilter [OK]
checkasm: all 21 tests passed
vp8_idct_add_c: 201.6
vp8_idct_add_neon: 83.1
vp8_idct_dc_add_c: 107.6
vp8_idct_dc_add_neon: 33.8
vp8_idct_dc_add4y_c: 426.4
vp8_idct_dc_add4y_neon: 59.4
vp8_loop_filter8uv_h_c: 688.1
vp8_loop_filter8uv_h_neon: 216.3
vp8_loop_filter8uv_inner_h_c: 649.3
vp8_loop_filter8uv_inner_h_neon: 195.3
vp8_loop_filter8uv_inner_v_c: 544.8
vp8_loop_filter8uv_inner_v_neon: 131.3
vp8_loop_filter8uv_v_c: 706.1
vp8_loop_filter8uv_v_neon: 141.1
vp8_loop_filter16y_h_c: 668.8
vp8_loop_filter16y_h_neon: 242.8
vp8_loop_filter16y_inner_h_c: 647.3
vp8_loop_filter16y_inner_h_neon: 224.6
vp8_loop_filter16y_inner_v_c: 647.8
vp8_loop_filter16y_inner_v_neon: 128.8
vp8_loop_filter16y_v_c: 721.8
vp8_loop_filter16y_v_neon: 154.3
vp8_loop_filter_simple_h_c: 387.8
vp8_loop_filter_simple_h_neon: 187.6
vp8_loop_filter_simple_v_c: 384.1
vp8_loop_filter_simple_v_neon: 78.6
vp8_put_epel8_h4v4_c: 3971.1
vp8_put_epel8_h4v4_neon: 855.1
vp8_put_epel8_h4v6_c: 5060.1
vp8_put_epel8_h4v6_neon: 989.6
vp8_put_epel8_h6v4_c: 4320.8
vp8_put_epel8_h6v4_neon: 1007.3
vp8_put_epel8_h6v6_c: 5449.3
vp8_put_epel8_h6v6_neon: 1158.1
vp8_put_epel16_h6_c: 6683.8
vp8_put_epel16_h6_neon: 831.8
vp8_put_epel16_h6v6_c: 11110.8
vp8_put_epel16_h6v6_neon: 2214.8
vp8_put_epel16_v6_c: 7024.8
vp8_put_epel16_v6_neon: 799.6
vp8_put_pixels8_c: 112.8
vp8_put_pixels8_neon: 78.1
vp8_put_pixels16_c: 131.3
vp8_put_pixels16_neon: 129.8
Signed-off-by: Magnus Röös <mla2.roos@gmail.com>

Fixes the following warning:
tests/checkasm/checkasm.c:615:12: warning: 'bench_init_ffmpeg' defined but not used

Fixes: OOM
Found-by: Michael Hanselmann <public@hansmi.ch>
Reviewed-by: Michael Hanselmann <public@hansmi.ch>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>

About 0.5% faster
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>

No speed difference, or slightly faster (the difference is too small so it may be noise
that this appears faster)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>

Signed-off-by: Mateusz Brzostek <mateuszb@poczta.onet.pl>
Reviewed-by: James Almer <jamrial@gmail.com>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>

use a:0,agroup:aud_low,default:Yes,language:CHN a:1,agroup:aud_low,language:ENG
        a:2,agroup:aud_high,default:YesYes,language:CHN a:3,agroup:aud_high,language:ENG
        v:0,agroup:aud_low v:1,agroup:aud_high
        create master m3u8 list.

result:
EXTM3U
EXT-X-VERSION:3
EXT-X-MEDIA:TYPE=AUDIO,GROUP-ID="group_aud_low",NAME="audio_0",DEFAULT=YES,LANGUAGE="CHN",URI="out_0.m3u8"
EXT-X-MEDIA:TYPE=AUDIO,GROUP-ID="group_aud_low",NAME="audio_1",DEFAULT=NO,LANGUAGE="ENG",URI="out_1.m3u8"
EXT-X-MEDIA:TYPE=AUDIO,GROUP-ID="group_aud_high",NAME="audio_2",DEFAULT=YES,LANGUAGE="CHN",URI="out_2.m3u8"
EXT-X-MEDIA:TYPE=AUDIO,GROUP-ID="group_aud_high",NAME="audio_3",DEFAULT=NO,LANGUAGE="ENG",URI="out_3.m3u8"
EXT-X-STREAM-INF:BANDWIDTH=1170400,RESOLUTION=640x480,CODECS="avc1.64001e,mp4a.40.2",AUDIO="group_aud_low"
out_4.m3u8
EXT-X-STREAM-INF:BANDWIDTH=3440800,RESOLUTION=640x480,CODECS="avc1.64001e,mp4a.40.2",AUDIO="group_aud_high"
out_5.m3u8
Signed-off-by: Steven Liu <lq@chinaffmpeg.org>

use a:0,agroup:aud_low,default:Yes a:1,agroup:aud_low,
    a:2,agroup:aud_high,default:Yes a:3, agroup:aud_high,
    v:0,agroup:aud_low v:1,agroup:aud_high
    create master m3u8 list.

result:
EXTM3U
EXT-X-VERSION:3
EXT-X-MEDIA:TYPE=AUDIO,GROUP-ID="group_aud_low",NAME="audio_0",DEFAULT=YES,URI="out_0.m3u8"
EXT-X-MEDIA:TYPE=AUDIO,GROUP-ID="group_aud_low",NAME="audio_1",DEFAULT=NO,URI="out_1.m3u8"
EXT-X-MEDIA:TYPE=AUDIO,GROUP-ID="group_aud_high",NAME="audio_2",DEFAULT=YES,URI="out_2.m3u8"
EXT-X-MEDIA:TYPE=AUDIO,GROUP-ID="group_aud_high",NAME="audio_3",DEFAULT=NO,URI="out_3.m3u8"
EXT-X-STREAM-INF:BANDWIDTH=1170400,RESOLUTION=640x480,CODECS="avc1.64001e,mp4a.40.2",AUDIO="group_aud_low"
out_4.m3u8
EXT-X-STREAM-INF:BANDWIDTH=3440800,RESOLUTION=640x480,CODECS="avc1.64001e,mp4a.40.2",AUDIO="group_aud_high"
out_5.m3u8
Signed-off-by: Steven Liu <lq@chinaffmpeg.org>

Signed-off-by: Steven Liu <lq@chinaffmpeg.org>

Fixes: Infinite loop
Found-by: Michael Hanselmann <public@hansmi.ch>
Reviewed-by: Michael Hanselmann <public@hansmi.ch>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>

If the frame1/2 checks fail this avoids doing the allocation of a new frame
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>

We assume that if the compressed size is bigger than if each byte is encoded in a single raw packet
that the data is invalid.

Fixes: Out of memory
Fixes: 12208/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_RASC_fuzzer-5648916473708544

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpegSigned-off-by: Michael Niedermayer <michael@niedermayer.cc>

Fixes: Timeout
Fixes: 12450/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_FIC_fuzzer-5661984622641152

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpegSigned-off-by: Michael Niedermayer <michael@niedermayer.cc>

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

Mouse position was not calculated properly in area or window mode
Signed-off-by: Dilshod Mukhtarov <dilshodm@gmail.com>

In Windows if using scaling other than 100% then the grabbed window was not captured fully (cropped)
Signed-off-by: Dilshod Mukhtarov <dilshodm@gmail.com>

Reviewed-by: Paul B Mahol <onemda@gmail.com>
Signed-off-by: James Almer <jamrial@gmail.com>

Signed-off-by: Marton Balint <cus@passwd.hu>

In streaming mode mp4 trailer is not required for playout.

Fixes: Timeout
Fixes: 12192/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_RSCC_fuzzer-6279038004363264

Before: clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_RSCC_fuzzer-6279038004363264 in 15423 ms
After:  clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_RSCC_fuzzer-6279038004363264 in 190 ms

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpegSigned-off-by: Michael Niedermayer <michael@niedermayer.cc>

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

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

Fixes: out of array access
Fixes: 12447/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_HYMT_fuzzer-5201623956062208
Fixes: 12458/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_HYMT_fuzzer-5705567736168448

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpegSigned-off-by: Michael Niedermayer <michael@niedermayer.cc>

The addition is moved up into the context where the variable is unsigned avoiding
the undefined behavior

Fixes: runtime error: signed integer overflow: 2147481972 + 4096 cannot be represented in type 'int'
Fixes: 12444/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_ILBC_fuzzer-5755706244857856

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpegSigned-off-by: Michael Niedermayer <michael@niedermayer.cc>

webrtc contains explicit code to ignore the undefined behavior (RTC_NO_SANITIZE / OverflowingAddS32S32ToS32())

Probably fixes: Integer overflow (unreproducable here)
Probably fixes: 12215/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_ILBC_fuzzer-5767142427852800

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpegSigned-off-by: Michael Niedermayer <michael@niedermayer.cc>

Signed-off-by: hwren <hwrenx@126.com>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>

When making a new P-frame when B-frames are present the previous P-frame
is normally in the DPB because it will be referred to by subsequent
B-frames.  However, this is not true if there are no B-frames, or in edge
cases where a GOP ends with two P-frames.  Fix this by adding the direct
ref pics to the RPS explicitly.

Fixes #7699.
Tested-by: Ullysses A Eoff <ullysses.a.eoff@intel.com>

Fixes ticket #7661.

The timestamp of the changed input frame as well as its relevant
properties can be examined by the user. Only applicable when
reinit_filter is disabled on the input stream.

The specification requires the demuxer to only read the data
atom up to its given size, this is necessary as atoms are
allowed at the end of the file.
This patch duplicates the behaviour of the QuickTime player.

Thanks Kostya for great help in reversing binary.

The VP3/4/5/6 reference decoders all use three IDCT versions: one for the
DC-only case, another for blocks with more than 10 coefficients, and an
optimised one for blocks with up to 10 AC coefficents. VP6 relies on the
sparse 10 coefficient version, and without it, IDCT drift occurs.

Fixes: https://trac.ffmpeg.org/ticket/1282Signed-off-by: Peter Ross <pross@xvid.org>

Partially fixes: https://trac.ffmpeg.org/ticket/1282Signed-off-by: Peter Ross <pross@xvid.org>

Partially fixes: https://trac.ffmpeg.org/ticket/1282Signed-off-by: Peter Ross <pross@xvid.org>

This version of the IDCT is used by the VP6 decoder.
Signed-off-by: Peter Ross <pross@xvid.org>

Signed-off-by: Peter Ross <pross@xvid.org>

This is also used by the VP6 decoder.
Signed-off-by: Peter Ross <pross@xvid.org>