Marcoen Hirschberg
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cd5edbe52c
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small cleanups
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@14772 a1c6a512-1295-4272-9138-f99709370657
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2007-09-20 10:50:59 +00:00 |
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Jens Arnold
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20444c47a8
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Fix warning.
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@14577 a1c6a512-1295-4272-9138-f99709370657
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2007-09-02 11:06:29 +00:00 |
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Michael Giacomelli
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a514c60fd0
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Apparently, negative exponents are possible when decoding exponential VLC. 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
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2007-09-02 03:28:49 +00:00 |
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Michael Giacomelli
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153d74443a
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Clean up iMDCT coefficient calculations.
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@14451 a1c6a512-1295-4272-9138-f99709370657
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2007-08-24 20:02:50 +00:00 |
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Michael Giacomelli
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8159b9ee9a
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Faster Q1.31 multiply for ARM. Add some ARM asm windowing code. Simply 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
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2007-08-16 03:33:15 +00:00 |
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Marcoen Hirschberg
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c43629f08b
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use the full resolution we get from the WMA decoder and let the DSP code do the rest
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@14224 a1c6a512-1295-4272-9138-f99709370657
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2007-08-06 23:34:28 +00:00 |
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Michael Giacomelli
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98f0d77879
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Clean up VLC functions.
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@14206 a1c6a512-1295-4272-9138-f99709370657
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2007-08-06 01:43:09 +00:00 |
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Dave Chapman
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2ff816fab6
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Cosmetic changes - TAB and whitespace policing.
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@14135 a1c6a512-1295-4272-9138-f99709370657
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2007-08-02 07:41:28 +00:00 |
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Michael Giacomelli
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206e883e78
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Initial attept at supporting Line Spectral Pairs. Various issues remain, 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
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2007-08-02 04:47:33 +00:00 |
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Michael Giacomelli
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54b80471a5
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Fix overflow in noise coding. Greatly improves sound quality of some low bitrate files
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@13975 a1c6a512-1295-4272-9138-f99709370657
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2007-07-25 02:34:21 +00:00 |
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Michael Giacomelli
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e9c09d4d0e
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Fix decoding of misc sample rates that no one ever uses
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@13946 a1c6a512-1295-4272-9138-f99709370657
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2007-07-21 01:03:58 +00:00 |
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Michael Giacomelli
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bc3ada265b
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Add incomplete support for files using noise coding but not LSP. In 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
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2007-07-20 21:36:54 +00:00 |
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Michael Giacomelli
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bab671eb4d
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Fix nasty bug that causes low bitrate files to crash because of an incorrect 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
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2007-07-20 03:41:09 +00:00 |
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Michael Giacomelli
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362f894a53
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Sync the bitstream functions with ffmpeg. Switch wmadeci.c over to get_vlc2 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
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2007-07-12 03:17:19 +00:00 |
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Dave Chapman
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a9df713ee9
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TAB and whitespace police
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@13858 a1c6a512-1295-4272-9138-f99709370657
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2007-07-11 23:07:41 +00:00 |
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Michael Giacomelli
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28b0c58726
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Don't assume files are WMAv2, instead actually check that they are and quit gracefully if they are not.
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@13855 a1c6a512-1295-4272-9138-f99709370657
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2007-07-11 16:58:11 +00:00 |
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Michael Giacomelli
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00b16fab6c
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Ancient ffmpeg bug fix that should never have been missed. Prevents 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
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2007-07-11 01:20:31 +00:00 |
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Dave Chapman
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88e32c2fc6
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Reorganise the wma_decode_superframe() function - split into a separate init 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
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2007-07-09 17:24:00 +00:00 |
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Dave Chapman
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85aa3a8d38
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Code reorganisation - move the vlc functions back to common.c/common.h (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
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2007-07-09 10:53:56 +00:00 |
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Michael Giacomelli
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4b1cf3ea44
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Compute MDCT in place. Make that place within IRAM. Gives nice speed boost on ARM. Probably make a huge difference on Coldfire.
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@13828 a1c6a512-1295-4272-9138-f99709370657
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2007-07-09 02:48:32 +00:00 |
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Michael Giacomelli
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5a1999eacd
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Move very commonly accessed array into IRAM. Should give a nice speedup on Coldfire.
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@13827 a1c6a512-1295-4272-9138-f99709370657
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2007-07-09 01:59:33 +00:00 |
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Michael Giacomelli
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899212858c
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Code clean up.
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@13825 a1c6a512-1295-4272-9138-f99709370657
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2007-07-09 00:21:19 +00:00 |
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Michael Giacomelli
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9b176d88c8
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Inline wma_window functions. No real performance improvement. Also, thanks 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
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2007-07-08 22:03:56 +00:00 |
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Michael Giacomelli
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610d3b4cc5
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Merge bit reverse tables together.
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@13822 a1c6a512-1295-4272-9138-f99709370657
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2007-07-08 21:52:49 +00:00 |
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Michael Giacomelli
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93bc5ef1d6
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Fix rare overflow when decoding MDCT coefficients. As a bonus, decoding is 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
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2007-07-08 06:06:00 +00:00 |
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Michael Giacomelli
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030dce6f88
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Fix previous
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@13814 a1c6a512-1295-4272-9138-f99709370657
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2007-07-08 05:57:14 +00:00 |
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Michael Giacomelli
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f5114daa73
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Move MDCT reconstruction window code over to new trig function. Improves 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
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2007-07-08 05:16:24 +00:00 |
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Michael Giacomelli
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2f1da8d24a
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Merged in first part of ffmpeg accuracy improvments. No change on my 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
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2007-07-06 02:44:58 +00:00 |
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Michael Giacomelli
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e0473717e5
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Merged in ffmpeg combined MDCT reconstruction. Saves us a 16KB buffer, and 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
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2007-07-06 01:50:24 +00:00 |
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Dave Chapman
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ba3f4ed565
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Remove some unused code
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@13788 a1c6a512-1295-4272-9138-f99709370657
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2007-07-04 20:27:26 +00:00 |
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Jens Arnold
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e7cdd6cbc6
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Assemblerised CMUL() for ARM, giving ~20% speedup.
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@13787 a1c6a512-1295-4272-9138-f99709370657
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2007-07-04 19:23:18 +00:00 |
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Michael Giacomelli
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a16d0f389e
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Code clean up: Move fixed point functions into their own files. Move various lookup tables into header files.
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@13784 a1c6a512-1295-4272-9138-f99709370657
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2007-07-04 17:15:09 +00:00 |
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Jens Arnold
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5717a0af87
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Shorten the coldfire fixmul32() by 2 instructions and use one register less. Smaller code, but practically no speed change.
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@13783 a1c6a512-1295-4272-9138-f99709370657
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2007-07-04 00:31:17 +00:00 |
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Thom Johansen
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4aeab55f67
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Replace some 64 bit multiplies with assembly on Coldfire targets. Codec lots closer to realtime on those targets now.
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@13779 a1c6a512-1295-4272-9138-f99709370657
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2007-07-03 19:36:26 +00:00 |
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Dave Chapman
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c72824786a
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Initial, work-in-progress, version of a WMA codec using Michael Giacomelli's 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
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2007-07-03 09:25:36 +00:00 |
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