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90 commits

Author SHA1 Message Date
Jean-Marc Valin
3c0aa8fc25 Adds "temporal VBR", which should be mostly useful at low bitrate. 
The idea is to allow more noise than the default in quiet segments.
Right now, this hurts for high bitrates , so it's gradually reduced
as the rate goes up, until it's completely disabled above 68 kb/s.
 2013-06-25 14:10:27 -04:00
Jean-Marc Valin
ee2506b2c7 Moves log2Amp inside denormalise_bands() and get rid of bandE[] 
Also get rid of the MSE measurement code which is outdated and no longer useful
 2013-06-16 20:24:52 -04:00
Jean-Marc Valin
3afc6ffff0 Don't call denormalise_bands() on silence 2013-06-16 15:40:10 -04:00
Jean-Marc Valin
39cbc45828 Fixes stupid tf calibration bugs introduced/exposed in f77410d 2013-06-13 16:13:51 -04:00
Jean-Marc Valin
28733d1281 Moves VBR calculations to a separate function. 
Does not change the behaviour of the VBR code in most cases. The only
exception is that the VBR offset is now taken into accound in the base_rate,
which will have a (very minor) impact on CVBR at low rate.
 2013-06-10 03:32:12 -04:00
Aurélien Zanelli
cd4c8249bc Add run-time CPU detection and support for ARM architecture 
Run-time CPU detection (RTCD) is enabled by default if target platform support
it.
It can be disable at compile time with --disable-rtcd option.

Add RTCD support for ARM architecture.

Thanks to Timothy B. Terriberry for help and code review

Signed-off-by: Timothy B. Terriberry <tterribe@xiph.org>
 2013-06-04 16:23:22 -07:00
Jean-Marc Valin
b7bd4c20ac celt_maxabs16() now returns an opus_val32 to avoid problems with -32768 2013-05-18 23:52:18 -04:00
Jean-Marc Valin
bd477ce2bc Merge branch 'surround' 2013-05-17 14:31:36 -04:00
Jean-Marc Valin
6e277c6291 Conservative use of bandwidth detection in CELT 
Takes into account the bitrate.
 2013-05-17 14:15:31 -04:00
Jean-Marc Valin
d2c484b5e7 Adds spreading to the surround masking computation 
This avoids a single low-energy band from changing the masking results.
 2013-05-06 16:02:31 -04:00
Jean-Marc Valin
a4dccd3f65 Implements basic surround masking 
The idea is that the rate of each stream is adjusted based on its
contribution to the total energy of a stereo downmix.
 2013-05-05 02:44:54 -04:00
Jean-Marc Valin
172f66a3ac More forced decisions in CELT LFE encoding 2013-05-05 02:32:00 -04:00
Jean-Marc Valin
b08c4ca3f5 Surround: Better LFE handling 
Forces CELT-only mode for LFE (despite the rate) and "locks" most of the
CELT analysis:
- No transient or TF
- Band boost on first band
- Only first two bands get PVQ bits
- Forced energy decay after the first two bands
 2013-05-05 02:31:38 -04:00
Jean-Marc Valin
f77410deb6 VBR bitrate calibration for variable duration. 
Also fixes uninitialized value in previous commit.
 2013-04-19 22:44:03 -04:00
Jean-Marc Valin
3252bf2a68 Variable framesize improvements 
- Properly apply the transient boost by counting all the bits in the cost
- Disable the post-filter for non-20-ms frames that follow a transient (applies
  only to variable framesize)
 2013-04-19 03:20:40 -04:00
Jean-Marc Valin
f96fc8cc83 Merge branch 'exp_analysis' 
Conflicts:
	celt/celt_encoder.c
 2013-03-08 12:29:53 -05:00
Jean-Marc Valin
69c3dcd105 Fixes a bug introduced in 851f803 2013-02-19 03:42:18 -05:00
Jean-Marc Valin
851f8033f6 Moves mono downmixing and upsampling to the compute_mdcts() 2013-02-18 01:43:43 -05:00
Jean-Marc Valin
541a472ff6 Adds code to revise the transient decision using the band energy 
Detects a transient when the average band energy jumps by more than 6 dB
between two consecutive frames. This fixes some undetected transients on
Gainless' Muse_Breaks_Rmx sample.
 2013-02-17 21:21:30 -05:00
Jean-Marc Valin
2a5f0565b8 Running transient_analysis() even for 2.5 ms frames 
This means 2.5 ms frames can now use a higher bitrate for transients.
 2013-02-10 00:15:49 -05:00
Jean-Marc Valin
48ac122141 Makes analysis usable for all frame sizes 2013-02-10 00:15:49 -05:00
Jean-Marc Valin
ebdfbfb743 Fixes stupid preprocessor-related bug introduced in e368e6209. 
Would cause the preemphasis and deemphasis to fail, but only with
custom modes enabled.
 2013-01-09 11:13:00 -05:00
Jean-Marc Valin
e368e62092 Remove condition in pre/de-emphasis when not building with custom modes 
Should slightly improve coverage and reduce code size
 2013-01-03 14:28:28 -05:00
Jean-Marc Valin
d683c76b88 Fixes MSVC warnings for double->float and float->int conversion 2012-12-21 16:17:38 -05:00
Jean-Marc Valin
5fb50adb7a skip bands with no energy 2012-12-21 11:52:03 -05:00
Jean-Marc Valin
90bac9d148 Minor tuining of complexity thresholds 2012-12-14 14:01:06 -05:00
Jean-Marc Valin
28ef277db4 VBR code simplification 2012-12-14 13:21:09 -05:00
Jean-Marc Valin
dae16fb94b Cleanup: tf_estimate now ranges from 0 to 1 2012-12-13 21:40:58 -05:00
Jean-Marc Valin
f8809dda4b Dynalloc rate calibration 2012-12-12 15:30:26 -05:00
Jean-Marc Valin
1122d299ab Makes "stereo savings" less aggressive on mono or near-mono. 
The max reduction now depends on intensity threshold too.
 2012-12-12 15:30:23 -05:00
Jean-Marc Valin
b33db8f318 Makes tonality boost less aggressive 
Some tests like Kamedo's HA test suggested that our tonal boost was a bit
too extreme.
 2012-12-12 15:30:14 -05:00
Jean-Marc Valin
41fd7a12b5 Disables the new spread+tapset estimator 2012-12-12 14:41:29 -05:00
Nils Wallménius
e0884feb36 Window both sides of overlap when adding them. 
Signed-off-by: Jean-Marc Valin <jmvalin@jmvalin.ca>
 2012-12-01 15:54:04 -05:00
Jean-Marc Valin
413caa00c5 Tweaks to the new transient detector 
Instead of using the average energy over the frame, we use a half-way
point between the average energy and the max energy.
 2012-11-19 16:41:14 -05:00
Jean-Marc Valin
144b6e6ede Oops, fixes transient_analysis() for the right channel 2012-11-11 17:30:57 -05:00
Jean-Marc Valin
10b30e74ab Fixes a VBR bug caused by maxDepth not to be computed without dynalloc 
Also, moves the dynalloc code to a separate function
 2012-11-11 17:30:53 -05:00
Jean-Marc Valin
1fd1d7dd49 Fixes a bug where transient frames would use previous spreading 
Also forces SPREAD_NORMAL in hybrid mode
 2012-11-08 17:22:07 -05:00
Jean-Marc Valin
a6d663c6ae Disables tf_analysis() for hybrid mode 
This prevents issues on speech where tf would undo what transient_analysis()
found
 2012-11-08 13:26:49 -05:00
Jean-Marc Valin
1ecb7eaeaf Fixes issues with multiple files defining CELT_C 2012-11-08 11:25:20 -05:00
Jean-Marc Valin
6906210cb0 Splits out the CELT encoder and decoder 2012-11-08 09:42:27 -05:00