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path: root/apps/codecs/libwma/wmadeci.c
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2007-09-02Apparently, negative exponents are possible when decoding exponential VLC. ↵Michael Giacomelli1-1/+4
Should fix occasional glitches that happened in files of all bitrates. git-svn-id: svn://svn.rockbox.org/rockbox/trunk@14571 a1c6a512-1295-4272-9138-f99709370657
2007-08-24Clean up iMDCT coefficient calculations.Michael Giacomelli1-28/+30
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@14451 a1c6a512-1295-4272-9138-f99709370657
2007-08-16Faster Q1.31 multiply for ARM. Add some ARM asm windowing code. Simply ↵Michael Giacomelli1-2/+47
replacing c code with loop unrolled + load/store multiple instructions makes a surprising difference on PP. Also, add comments to the windowing code. git-svn-id: svn://svn.rockbox.org/rockbox/trunk@14365 a1c6a512-1295-4272-9138-f99709370657
2007-08-06use the full resolution we get from the WMA decoder and let the DSP code do ↵Marcoen Hirschberg1-16/+6
the rest git-svn-id: svn://svn.rockbox.org/rockbox/trunk@14224 a1c6a512-1295-4272-9138-f99709370657
2007-08-06Clean up VLC functions.Michael Giacomelli1-11/+10
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@14206 a1c6a512-1295-4272-9138-f99709370657
2007-08-02Cosmetic changes - TAB and whitespace policing.Dave Chapman1-66/+59
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@14135 a1c6a512-1295-4272-9138-f99709370657
2007-08-02Initial attept at supporting Line Spectral Pairs. Various issues remain, ↵Michael Giacomelli1-38/+61
and the ffmpeg decoder itself often fails on certain valid LSP files. Expect some issues. git-svn-id: svn://svn.rockbox.org/rockbox/trunk@14134 a1c6a512-1295-4272-9138-f99709370657
2007-07-25Fix overflow in noise coding. Greatly improves sound quality of some low ↵Michael Giacomelli1-1/+1
bitrate files git-svn-id: svn://svn.rockbox.org/rockbox/trunk@13975 a1c6a512-1295-4272-9138-f99709370657
2007-07-21Fix decoding of misc sample rates that no one ever usesMichael Giacomelli1-10/+10
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@13946 a1c6a512-1295-4272-9138-f99709370657
2007-07-20Add incomplete support for files using noise coding but not LSP. In ↵Michael Giacomelli1-28/+37
practice, this means files >= 20kbps will probably work, and those below will probably not. git-svn-id: svn://svn.rockbox.org/rockbox/trunk@13945 a1c6a512-1295-4272-9138-f99709370657
2007-07-20Fix nasty bug that causes low bitrate files to crash because of an incorrect ↵Michael Giacomelli1-59/+25
assumption about MDCT window sizes on my part. Clears the way for further low bitrate fixes. git-svn-id: svn://svn.rockbox.org/rockbox/trunk@13937 a1c6a512-1295-4272-9138-f99709370657
2007-07-12Sync the bitstream functions with ffmpeg. Switch wmadeci.c over to get_vlc2 ↵Michael Giacomelli1-23/+39
which is how ffmpeg now does it and is also slightly faster. Add in defines for later VLC memory usage optization. Kill some header files that weren't needed and update others that were out of sync. We're now much closer to the current ffmpeg codec which should make fixing the remaining issues much easier. git-svn-id: svn://svn.rockbox.org/rockbox/trunk@13859 a1c6a512-1295-4272-9138-f99709370657
2007-07-11TAB and whitespace policeDave Chapman1-5/+5
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@13858 a1c6a512-1295-4272-9138-f99709370657
2007-07-11Don't assume files are WMAv2, instead actually check that they are and quit ↵Michael Giacomelli1-1/+4
gracefully if they are not. git-svn-id: svn://svn.rockbox.org/rockbox/trunk@13855 a1c6a512-1295-4272-9138-f99709370657
2007-07-11Ancient ffmpeg bug fix that should never have been missed. Prevents ↵Michael Giacomelli1-2/+3
floating point value from truncating downward. My files are byte for byte identical with this fix, but the ffmpeg mailing list claims its important. git-svn-id: svn://svn.rockbox.org/rockbox/trunk@13846 a1c6a512-1295-4272-9138-f99709370657
2007-07-09Reorganise the wma_decode_superframe() function - split into a separate init ↵Dave Chapman1-40/+65
and decode functions. Each call to the decode function now decodes a single frame (2048 samples) instead of an entire superframe (which typically contained about 7 or 8 frames and can in theory contain up to 16 frames). This allows us to replace the 256KB output buffer with a 8KB buffer, and also perform more yields in the main decoding loop. git-svn-id: svn://svn.rockbox.org/rockbox/trunk@13833 a1c6a512-1295-4272-9138-f99709370657
2007-07-09Code reorganisation - move the vlc functions back to common.c/common.h ↵Dave Chapman1-211/+0
(where they originally were in the ffmpeg source). This code is still identical to the ffmpeg source. git-svn-id: svn://svn.rockbox.org/rockbox/trunk@13830 a1c6a512-1295-4272-9138-f99709370657
2007-07-09Compute MDCT in place. Make that place within IRAM. Gives nice speed boost ↵Michael Giacomelli1-18/+18
on ARM. Probably make a huge difference on Coldfire. git-svn-id: svn://svn.rockbox.org/rockbox/trunk@13828 a1c6a512-1295-4272-9138-f99709370657
2007-07-09Move very commonly accessed array into IRAM. Should give a nice speedup on ↵Michael Giacomelli1-7/+11
Coldfire. git-svn-id: svn://svn.rockbox.org/rockbox/trunk@13827 a1c6a512-1295-4272-9138-f99709370657
2007-07-09Code clean up.Michael Giacomelli1-117/+24
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@13825 a1c6a512-1295-4272-9138-f99709370657
2007-07-08Inline wma_window functions. No real performance improvement. Also, thanks ↵Michael Giacomelli1-2/+2
to Benjamin Larsson for cleaning up some code I was simply to lazy to fix myself. git-svn-id: svn://svn.rockbox.org/rockbox/trunk@13823 a1c6a512-1295-4272-9138-f99709370657
2007-07-08Merge bit reverse tables together.Michael Giacomelli1-17/+33
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@13822 a1c6a512-1295-4272-9138-f99709370657
2007-07-08Fix rare overflow when decoding MDCT coefficients. As a bonus, decoding is ↵Michael Giacomelli1-17/+9
now slightly faster. Thanks to preglow for suggesting I test with a full scale normalized square wave. git-svn-id: svn://svn.rockbox.org/rockbox/trunk@13815 a1c6a512-1295-4272-9138-f99709370657
2007-07-08Fix previousMichael Giacomelli1-2/+2
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@13814 a1c6a512-1295-4272-9138-f99709370657
2007-07-08Move MDCT reconstruction window code over to new trig function. Improves ↵Michael Giacomelli1-41/+10
accuracy significantly and slightly reduces code size. Codec SNR now appears to be limited by truncation to 16 bit. Comparison to MS decoder gives > 91 dB of agreement, and a lower RMS error verses the source wav then MS. Additionally, move one commonly accessed table into IRAM. git-svn-id: svn://svn.rockbox.org/rockbox/trunk@13813 a1c6a512-1295-4272-9138-f99709370657
2007-07-06Merged in first part of ffmpeg accuracy improvments. No change on my ↵Michael Giacomelli1-37/+16
samples, but brings us closer to ffmpeg's source and clears the way for additional bug fixes. git-svn-id: svn://svn.rockbox.org/rockbox/trunk@13804 a1c6a512-1295-4272-9138-f99709370657
2007-07-06Merged in ffmpeg combined MDCT reconstruction. Saves us a 16KB buffer, and ↵Michael Giacomelli1-94/+83
gives a nice speed increase. Brings code much closer to ffmpeg's. git-svn-id: svn://svn.rockbox.org/rockbox/trunk@13803 a1c6a512-1295-4272-9138-f99709370657
2007-07-04Remove some unused codeDave Chapman1-22/+0
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@13788 a1c6a512-1295-4272-9138-f99709370657
2007-07-04Assemblerised CMUL() for ARM, giving ~20% speedup.Jens Arnold1-1/+23
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@13787 a1c6a512-1295-4272-9138-f99709370657
2007-07-04Code clean up: Move fixed point functions into their own files. Move ↵Michael Giacomelli1-514/+7
various lookup tables into header files. git-svn-id: svn://svn.rockbox.org/rockbox/trunk@13784 a1c6a512-1295-4272-9138-f99709370657
2007-07-04Shorten the coldfire fixmul32() by 2 instructions and use one register less. ↵Jens Arnold1-21/+21
Smaller code, but practically no speed change. git-svn-id: svn://svn.rockbox.org/rockbox/trunk@13783 a1c6a512-1295-4272-9138-f99709370657
2007-07-03Replace some 64 bit multiplies with assembly on Coldfire targets. Codec lots ↵Thom Johansen1-2/+47
closer to realtime on those targets now. git-svn-id: svn://svn.rockbox.org/rockbox/trunk@13779 a1c6a512-1295-4272-9138-f99709370657
2007-07-03Initial, work-in-progress, version of a WMA codec using Michael Giacomelli's ↵Dave Chapman1-0/+2592
fixed-point and malloc-less WMA decoder (based on the ffmpeg WMA decoder from early 2006, and also building on the work started by Paul Jones). The codec itself and the ASF parsing code were written by me, inspired by the ASF parser in libasf. Current performance is around 400% realtime on gigabeat, 100% realtime on PP and 20% realtime on Coldfire. git-svn-id: svn://svn.rockbox.org/rockbox/trunk@13769 a1c6a512-1295-4272-9138-f99709370657
generated by cgit (git 2.34.1) at 2024-04-18 07:28:01 +0000