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115 commits

Author SHA1 Message Date
Jean-Marc Valin
0d584b905a Prevents LFE from busting at really low bitrate 2013-11-13 22:42:04 -05:00
Jean-Marc Valin
a71c9adf52 Fixes MSVC conversion warnings 2013-11-13 12:07:01 -05:00
Jean-Marc Valin
ca6fac041b Fixes some minor issues found by scan build 2013-11-09 18:28:40 -05:00
Jean-Marc Valin
c1959e7dc3 Taking into account the frame size in more encoder decisions 
Stereo mode, stereo width, min bandwidth, VBR damping
 2013-11-08 19:24:10 -05:00
Jean-Marc Valin
8f466274d3 Removes a float var that shouldn't have been there 
Defining FIXED_POINT and DISABLE_FLOAT_API now leaves no float instruction
 2013-10-28 21:50:10 -04:00
Jean-Marc Valin
9c23f5cdca Makes stereo savings still less aggressive 
Caps the savings at 1 bit per (coded) sample. This doesn't really increase
the bitrate and fixes some issues, e.g. with IgorC's "twilight" sample.
 2013-10-28 14:15:18 -04:00
Jean-Marc Valin
942fc816d1 Replaces log2() with celt_log2() and fixes a potential divide-by-zero 2013-10-01 19:27:30 -04:00
Jean-Marc Valin
7c60625f80 Merge branch 'exp_surround1' 2013-10-01 17:06:09 -04:00
Stefan Hacker
a32fa319d3 Avoid using C++ keyword 'new' 
Signed-off-by: Jean-Marc Valin <jmvalin@jmvalin.ca>
 2013-09-29 00:07:52 -04:00
Jean-Marc Valin
36a21ed536 Very basic surround rate calibration 2013-09-14 15:46:09 -04:00
Jean-Marc Valin
ae7dc8a13f More surround masking tuning 2013-09-13 15:05:50 -04:00
Jean-Marc Valin
039e9ab155 Tuning the surround masking 
We're now a bit more conservative and only take into account the bands
that are being codec. Also weighting the rate saving by the band width.
 2013-09-12 03:05:43 -04:00
Jean-Marc Valin
ba7dbb365e Analysis scaling fixes 
This should make the scaling the same for fixed and float. It changes the float
scaling too by normalizing by the number of channels, which matters for
bandwidth detection.
 2013-09-09 16:39:19 -04:00
Jean-Marc Valin
3ab03e0556 First pass at making the analysis code run with FIXED_POINT 
Code is still float, but at least tonality esitmation seems to work.
Speech/music analysis is still disabled.
 2013-09-06 16:00:39 -04:00
Jean-Marc Valin
0f68696a97 Adds trim and dynalloc control to surround masking 2013-09-05 12:49:55 -04:00
Jean-Marc Valin
fdceae89bf Surround masking rewrite 
The channel energy is now computed using an MDCT in the multi-stream
encoder rather than computing the energy of the stereo downmix.
 2013-08-30 21:58:02 -04:00
Jean-Marc Valin
e45509294c Better handling of the dynalloc cap for CBR/CVBR 2013-07-30 05:12:46 -04:00
Jean-Marc Valin
8259492a7d Fixes an integer wrap-around due to an exceedingly large QCONST16 2013-07-25 13:55:15 -04:00
Gregory Maxwell
5280c71883 Revert "Fixes a number of double promotions and missing casts." 
This reverts commit 43279728cd.
 2013-07-15 15:51:24 -07:00
Gregory Maxwell
43279728cd Fixes a number of double promotions and missing casts. 
At a minimum MSVC warns on some of this stuff.
 2013-07-15 15:23:03 -07:00
Jean-Marc Valin
cd373b54de Surround masking tuning 
More conservative surround masking
Disables temporal VBR on surround
Disables tonality on LFE
 2013-07-07 02:51:07 -04:00
Jean-Marc Valin
4365498d48 Prevents zero-energy on LFE 2013-07-07 00:39:35 -04:00
Jean-Marc Valin
92a06f51a7 Disables temporal VBR for LFE 2013-07-01 16:27:07 -04:00
Jean-Marc Valin
8e3a1cbf48 Temporal VBR tuning 
Applies temporal VBR up to higher bitrates after IgorC reported it being
useful at 64 kb/s for amount=0.1
 2013-07-01 16:14:48 -04:00
Jean-Marc Valin
16ba19a95b Fixes MSVC warnings 2013-06-27 03:40:44 -04:00
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