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2017-05-20avfilter: take_samples: do not directly return frame when samples are skippedMuhammad Faiz
Modifying data pointer when skipping samples may make it unaligned. Workaround for Ticket6349. This should fix the crash of ticket's testcase and a crash/regression with avxsynth (reported by Michael Niedermayer). Also change frame->nb_samples < max to frame->nb_samples <= max. This improves performance. Benchmark: ./ffmpeg -filter_complex "aevalsrc=0:n=1166,firequalizer=fixed=on" -f null null old: 25767 decicycles in take_samples, 1023 runs, 1 skips 25422 decicycles in take_samples, 2047 runs, 1 skips 25181 decicycles in take_samples, 4095 runs, 1 skips 24904 decicycles in take_samples, 8191 runs, 1 skips new: 550 decicycles in take_samples, 1024 runs, 0 skips 548 decicycles in take_samples, 2048 runs, 0 skips 545 decicycles in take_samples, 4096 runs, 0 skips 544 decicycles in take_samples, 8192 runs, 0 skips Reviewed-by: Nicolas George <george@nsup.org> Reviewed-by: Michael Niedermayer <michael@niedermayer.cc> Reviewed-by: Paul B Mahol <onemda@gmail.com> Signed-off-by: Muhammad Faiz <mfcc64@gmail.com>
2017-01-29lavfi: make ff_framequeue_skip_samples() more useful.Nicolas George
Instead of just updating statistics and leaving the work to the call site, have it actually do the work. Also: skip the samples by updating the frame data pointers instead of moving the samples. More efficient and avoid writing into shared frames. Found-By: Muhammad Faiz <mfcc64@gmail.com>
2016-12-20lavfi/framequeue: avoid empty structs.Nicolas George
Fix compilation on MSVC.
2016-12-18lavfi: add FFFrameQueue API.Nicolas George