Since the default in the libav fork is to only allow known layouts, making
unknown layouts allowed by default here can be a security risk for filters
directly merged from libav. However, usually it is simple to detect such cases,
use of av_get_channel_layout_nb_channels is a good indicator, so I suggest we
change this regardless.

See http://ffmpeg.org/pipermail/ffmpeg-devel/2016-November/203204.html.

This patch indirectly adds unknown channel layout support for filters where
query_formats is not specified:

abench
afifo
ainterleave
anullsink
apad
aperms
arealtime
aselect
asendcmd
asetnsamples
asetpts
asettb
ashowinfo
azmq

It introduces a query_formats callback for the asyncts filter, which only
supports known channel layouts since it is using libavresample.

And it removes .query_formats callback from filters where it was only there to
support unknown layouts, as this is now the default:

aloop
ametadata
anull
asidedata
asplit
atrim
Acked-by: Nicolas George <george@nsup.org>
Signed-off-by: Marton Balint <cus@passwd.hu>

This decreases the amount of computations and memory needed for analysing mpeg1/2 streams

the properties update is moved from code that is skiped if skip_frame is set
to code that is not skiped so the change doesnt loose that
from being executed
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>

This is faster 2871 -> 2189  cycles for int16 matrixbench -> 23456hz
Fixes a integer overflow in a artificial corner case
Fixes part of 668007-media
Found-by: Matt Wolenetz <wolenetz@google.com>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>

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

Fixes undefined operation
Fixes part of 668007-media
Found-by: Matt Wolenetz <wolenetz@google.com>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>

Fixes: part of 670190.ogg
Found-by: Matt Wolenetz <wolenetz@google.com>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>

Fixes: part of 670190.ogg
Fixes integer overflow
Found-by: Matt Wolenetz <wolenetz@google.com>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>

This could happen when there was a frame number gap and frame threading was used.

This fixes #5458.
Debugging-by: Ronald S. Bultje <rsbultje@gmail.com>
Debugging-by: Justin Ruggles <justin.ruggles@gmail.com>
Signed-off-by: Derek Buitenhuis <derek.buitenhuis@gmail.com>

Reviewed-by: Michael Niedermayer <michael@niedermayer.cc>
Signed-off-by: James Almer <jamrial@gmail.com>

Reviewed-by: Michael Niedermayer <michael@niedermayer.cc>
Signed-off-by: James Almer <jamrial@gmail.com>

We are checking during encoding if there is enough space as version 4 needs that
check.

Fixes Ticket6005
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>

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

It describes the type of the previous che element (SCE, CPE, CCE, or
LFE) and does not reflect non-che elements.

Fixes https://www2.iis.fraunhofer.de/AAC/7.1auditionOutLeader_v2_rtb.mp4

Reported-by: rcombs on IRC

Examples use the native FFmpeg AAC encoder but it is no longer
considered experimental and therefore not required.
Signed-off-by: Lou Logan <lou@lrcd.com>

Signed-off-by: Paul B Mahol <onemda@gmail.com>

This allows user apps to stop OOM due to excessive number of streams
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>

Signed-off-by: Martin Storsjö <martin@martin.st>
(cherry picked from commit 6a62795d)
Cherry pick Suggested-by: Martin Storsjö

This should fix the build failure on macosx
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>

Signed-off-by: Timo Rothenpieler <timo@rothenpieler.org>

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

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

Fixes slow loops on fuzzed data
Fixes: 245/fuzz-3-ffmpeg_AUDIO_AV_CODEC_ID_FLAC_fuzzer

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

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

Reviewed-by: Michael Niedermayer <michael@niedermayer.cc>
Signed-off-by: Andreas Cadhalpun <Andreas.Cadhalpun@googlemail.com>

32-bit msvc.

This implements Spherical Video V1 and V2, as described in the
spatial-media collection by Google.
Signed-off-by: Vittorio Giovara <vittorio.giovara@gmail.com>

Signed-off-by: Vittorio Giovara <vittorio.giovara@gmail.com>

While no decoder currently exports spherical information, this type
represents a frame property that has to be passed through from container
to frames.
Signed-off-by: Vittorio Giovara <vittorio.giovara@gmail.com>

Fixes memleak
Fixes: 236/8aeebc9ca49b91bf71c114dcefac56c154a3a563

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

when use fix ticket 2nd problem.

command line test step:
rm -rf output*;./ffmpeg  -i ~/Movies/objectC/facebook.mp4 -an -c:v copy
-f hls -hls_time 4 -hls_list_size 5 -hls_flags +delete_segments
-hls_flags +append_list -hls_flags +omit_endlist -hls_flags
+discont_start -t 50 output.m3u8
./ffmpeg -i ~/Movies/objectC/facebook.mp4 -an -c:v libx264 -g 4 -f hls
-hls_time 4 -hls_list_size 5 -hls_flags +delete_segments -hls_flags
+append_list -hls_flags +omit_endlist -hls_flags +discont_start -t 5
output.m3u8
./ffmpeg -i ~/Movies/objectC/facebook.mp4 -an -c:v libx264 -g 4 -f hls
-hls_time 4 -hls_list_size 5 -hls_flags +delete_segments -hls_flags
+append_list -hls_flags +omit_endlist -hls_flags +discont_start -t 5
output.m3u8

result:
 #EXTM3U
 #EXT-X-VERSION:3
 #EXT-X-TARGETDURATION:5
 #EXT-X-MEDIA-SEQUENCE:6
 #EXTINF:4.120000,
 output6.ts
 #EXT-X-DISCONTINUITY
 #EXTINF:4.000000,
 output7.ts
 #EXTINF:0.960000,
 output8.ts
 #EXT-X-DISCONTINUITY
 #EXTINF:4.000000,
 output9.ts
 #EXTINF:0.960000,
 output10.ts
Signed-off-by: Steven Liu <lq@chinaffmpeg.org>

Yorkfield:
 - mmx2: 2.53x (504 vs. 199 cycles)
 - sse2: 3.83x (504 vs. 131 cycles)

Nehalem:
 - mmx2: 2.42x (365 vs. 151 cycles)
 - sse2: 3.56x (365 vs. 103 cycles)

Skylake:
 - mmx2: 1.81x (308 vs. 170 cycles)
 - sse2: 2.84x (308 vs. 108 cycles)
 - avx:  2.93x (308 vs. 105 cycles)

Yorkfield:
 - mmx2: 2.45x (279 vs. 114 cycles)
 - sse2: 3.36x (279 vs.  83 cycles)

Nehalem:
 - mmx2: 2.10x (192 vs.  92 cycles)
 - sse2: 2.84x (192 vs.  68 cycles)

Skylake:
 - mmx2: 1.75x (170 vs.  97 cycles)
 - sse2: 2.47x (170 vs.  69 cycles)
 - avx:  2.47x (170 vs.  69 cycles)

Fixes CID1396851.

Also use av_mallocz_array().

Fixes CID1396839.

Fixes ticket #5997.

Signed-off-by: Thomas Turner <thomastdt@googlemail.com>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>

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