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  1. 04 12月, 2015 6 次提交
  3. 03 12月, 2015 26 次提交
  5. 02 12月, 2015 8 次提交
    • C
      lavf/rtpenc_jpeg: Less strict check for standard Huffman tables. · d208acf2
      由 Carl Eugen Hoyos 提交于 
      There can be one or more Huffman table segments DHT.

Reported-by: Andrey Utkin
      d208acf2
    • P
      avfilter/af_stereotools: remove floor usage · 6670527d
      由 Paul B Mahol 提交于 
      Signed-off-by: NPaul B Mahol <onemda@gmail.com>
      6670527d
    • P
      avfilter: add audio pulsator filter · c4f7b8f0
      由 Paul B Mahol 提交于 
      Signed-off-by: NPaul B Mahol <onemda@gmail.com>
      c4f7b8f0
    • C
      AAC encoder: improve SF range utilization · ca203e99
      由 Claudio Freire 提交于 
      This patch does 4 things, all of which interact and thus it
woudln't be possible to commit them separately without causing
either quality regressions or assertion failures.

Fate comparison targets don't all reflect improvements in
quality, yet listening tests show substantially improved quality
and stability.

1. Increase SF range utilization.

The spec requires SF delta values to be constrained within the
range -60..60. The previous code was applying that range to
the whole SF array and not only the deltas of consecutive values,
because doing so requires smarter code: zeroing or otherwise
skipping a band may invalidate lots of SF choices.

This patch implements that logic to allow the coders to utilize
the full dynamic range of scalefactors, increasing quality quite
considerably, and fixing delta-SF-related assertion failures,
since now the limitation is enforced rather than asserted.

2. PNS tweaks

The previous modification makes big improvements in twoloop's
efficiency, and every time that happens PNS logic needs to be
tweaked accordingly to avoid it from stepping all over twoloop's
decisions. This patch includes modifications of the sort.

3. Account for lowpass cutoff during PSY analysis

The closer PSY's allocation is to final allocation the better
the quality is, and given these modifications, twoloop is now
very efficient at avoiding holes. Thus, to compute accurate
thresholds, PSY needs to account for the lowpass applied
implicitly during twoloop (by zeroing high bands).

This patch makes twoloop set the cutoff in psymodel's context
the first time it runs, and makes PSY account for it during
threshold computation, making PE and threshold computations
closer to the final allocation and thus achieving better
subjective quality.

4. Tweaks to RC lambda tracking loop in relation to PNS

Without this tweak some corner cases cause quality regressions.
Basically, lambda needs to react faster to overall bitrate
efficiency changes since now PNS can be quite successful in
enforcing maximum bitrates, when PSY allocates too many bits
to the lower bands, suppressing the signals RC logic uses to
lower lambda in those cases and causing aggressive PNS.

This tweak makes PNS much less aggressive, though it can still
use some further tweaks.

Also update MIPS specializations and adjust fuzz

Also in lavc/mips/aacpsy_mips.h: remove trailing whitespace
      ca203e99
    • A
      avformat/matroskadec: Fix sample_aspect_ratio for stereo matroska content · ec83efd4
      由 Aaron Colwell 提交于 
      matroskaenc.c applies divisors to the display width/height when generating
stereo content. This patch adds the corresponding multipliers to matroskadec.c
so that the original sample aspect ratio can be recovered.
Signed-off-by: Nwm4 <nfxjfg@googlemail.com>
      ec83efd4
    • C
      avformat/mp3dec: prefer "fast_seek" to TOC seek for CBR files. · 5e6ce28d
      由 Chris Cunningham 提交于 
      "Fast seek" uses linear interpolation to find the position of the
requested seek time. For CBR this is more direct than using the
mp3 TOC and bypassing the TOC avoids problems with TOC precision.
(see https://crbug.com/545914#c13)

For VBR, fast seek is not precise, so continue to prefer the TOC
when available (the lesser of two evils).

Also, some re-ordering of the logic in mp3_seek to simplify and
give usetoc=1 precedence over fastseek flag.
Signed-off-by: Nwm4 <nfxjfg@googlemail.com>
      5e6ce28d
    • M
      avcodec/mpegaudio_tablegen: Add (), fix fate · e1057bab
      由 Michael Niedermayer 提交于 
      Signed-off-by: NMichael Niedermayer <michael@niedermayer.cc>
      e1057bab
    • G
      avfilter/af_volumedetect: use log10 instead of hardcoded constant · 8c243805
      由 Ganesh Ajjanagadde 提交于 
      This is likely more precise and conveys the intent better.
Reviewed-by: NMark Harris <mark.hsj@gmail.com>
Signed-off-by: NGanesh Ajjanagadde <gajjanagadde@gmail.com>
      8c243805