The 3GPP spec uses the following calculation for high spreading:

thr'_spr = max(thr_scaled, s_h(n) * thr_scaled(n-1))

where, n is defined as the current band, and s_h() is defined as "[...] the
distance of adjacent bands in Bark and a constant slope that is 15 dB/Bark
[...]". This is a little ambiguous as you would assume you want the Bark
width of the previous band for this calculation. However, this assumption
appears to be incorrect, and you really want the Bark width of the current
band. Coincidentally this is exactly what the spec calls for! =P

This noticeably improves Tom's Diner at low bitrates (I tested at 64kbps,
with mid/side disabled).

Patch by: Nathan Caldwell <saintdev@gmail.com>

Originally committed as revision 25622 to svn://svn.ffmpeg.org/ffmpeg/trunk

Patch by: Nathan Caldwell <saintdev@gmail.com>

Originally committed as revision 25621 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 25620 to svn://svn.ffmpeg.org/ffmpeg/trunk

These blocks depended on the compiler keeping xmm registers untouched between
them.

Originally committed as revision 25619 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 25618 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 25617 to svn://svn.ffmpeg.org/ffmpeg/trunk

opt_codec_tag() is now used under OPT_FUNC2, which must return a value.

Originally committed as revision 25616 to svn://svn.ffmpeg.org/ffmpeg/trunk

suncc does not like the leading commas inside the macro, but it has no problem
with trailing commas.

Originally committed as revision 25615 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 25614 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 25613 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 25612 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 25611 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 25610 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 25609 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 25608 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 25607 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 25606 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 25605 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 25604 to svn://svn.ffmpeg.org/ffmpeg/trunk

Fixes issue 2317.

Patch by Rocky Cardwell, rocky d cardwell a lifespringschool d org

Originally committed as revision 25603 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 25602 to svn://svn.ffmpeg.org/ffmpeg/trunk

handle_jpeg may update the src/dstFormat variables, this makes sure the
updated version is stored in the context.

This fixes roundup issue 2302.

Patch by Troot, all_crap_goes_here at hotmail

Originally committed as revision 32562 to svn://svn.mplayerhq.hu/mplayer/trunk/libswscale

Originally committed as revision 25601 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 25600 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 25599 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 25598 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 25597 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 25596 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 25595 to svn://svn.ffmpeg.org/ffmpeg/trunk

Difference in filesizes to foreman ffv1 version=2, context=1 coder=1
18637016 adv-pass2-g300.avi
18638806 adv-pass1-g300.avi
18640534 ref-pass2-g300.avi
18918214 adv-pass2-g1.avi
18982048 ref-pass2-g1.avi
21516230 adv-pass1-g1.avi

Originally committed as revision 25594 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 25593 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 25592 to svn://svn.ffmpeg.org/ffmpeg/trunk

Fixes issue 2322.

Originally committed as revision 25591 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 25590 to svn://svn.ffmpeg.org/ffmpeg/trunk

This greatly improves bitrate handling. You will now get within a few
kbps of your requested bitrate instead of 20-40kbps higher.

There is absolutely no analog to this line in the 3GPP spec, that I
can find.

patch by Nathan Caldwell saintdev (at) gmail

Originally committed as revision 25589 to svn://svn.ffmpeg.org/ffmpeg/trunk

Removing the modification vastly improves quality (at a slight bitrate
cost) for some samples. castanets.wav is a good example. The closest
equivalent I see to the modification in the 3GPP spec is a similar
modification (over a specific frequency range) when TNS is used.

This also changes the threshold-in-quiet calculation to match the
3GPP spec.

patch by Nathan Caldwell saintdev (at) gmail

Originally committed as revision 25588 to svn://svn.ffmpeg.org/ffmpeg/trunk

According to the 3GPP spec:
"Thus the pre-echo control is inactive for the first short window (but
not all short windows in a short frame) after a start block and for
all frames with a stop window sequence."

Currently, pre-echo control is only run when the current frame is not
a short frame, and the previous frame is not a short frame.

patch by Nathan Caldwell saintdev (at) gmail

Originally committed as revision 25587 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 25586 to svn://svn.ffmpeg.org/ffmpeg/trunk

This may be needed to avoid calls to implicitly defined functions
(that will be removed by dead code elimination later anyway).

Originally committed as revision 25585 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 25584 to svn://svn.ffmpeg.org/ffmpeg/trunk