c55e5b5fee
ff_sine_windows table contains only constant data, too.
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Originally committed as revision 19785 to svn://svn.ffmpeg.org/ffmpeg/trunk
2009-09-06 08:56:10 +00:00
7d485f165f
Support for getting (i)MDCT output multiplied by a constant scaling factor.
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Scaling (i)MDCT output has no runtime overhead and can be used to improve
performance of audio codecs. All the changes are only needed in
'ff_mdct_init' function and slow down initialization a bit.
Originally committed as revision 18855 to svn://svn.ffmpeg.org/ffmpeg/trunk
2009-05-16 14:17:08 +00:00
b278a1ed1c
Remove useless += from ff_imdct_half_c() found by CSA.
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Originally committed as revision 18578 to svn://svn.ffmpeg.org/ffmpeg/trunk
2009-04-17 18:12:00 +00:00
f0d5437275
Remove documentation of non-existing function parameters.
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Originally committed as revision 16994 to svn://svn.ffmpeg.org/ffmpeg/trunk
2009-02-04 20:43:17 +00:00
5363c43ea8
Add av_cold attributes to *_init and *_end functions.
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Originally committed as revision 16980 to svn://svn.ffmpeg.org/ffmpeg/trunk
2009-02-03 23:09:00 +00:00
bad5537e2c
Use full internal pathname in doxygen @file directives.
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Otherwise doxygen complains about ambiguous filenames when files exist
under the same name in different subdirectories.
Originally committed as revision 16912 to svn://svn.ffmpeg.org/ffmpeg/trunk
2009-02-01 02:00:19 +00:00
406792e7b0
cosmetics: Remove pointless period after copyright statement non-sentences.
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Originally committed as revision 16684 to svn://svn.ffmpeg.org/ffmpeg/trunk
2009-01-19 15:46:40 +00:00
336c2ca585
Add size that is needed for the wmapro codec
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Originally committed as revision 16533 to svn://svn.ffmpeg.org/ffmpeg/trunk
2009-01-11 10:40:05 +00:00
71375e0500
Try to fix wma regression.
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Originally committed as revision 15261 to svn://svn.ffmpeg.org/ffmpeg/trunk
2008-09-08 13:37:12 +00:00
67f718bd11
Add a temp variable to ff_sine_window_init() to match the way wma.c computed
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window before r14757. This fixes a regression introduced by r14757 on amd64.
Originally committed as revision 14982 to svn://svn.ffmpeg.org/ffmpeg/trunk
2008-08-26 19:40:53 +00:00
47698b83fd
The ff_sine_#[] should be aligned as they will commonly be used in dsputil
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functions
Originally committed as revision 14767 to svn://svn.ffmpeg.org/ffmpeg/trunk
2008-08-14 22:12:19 +00:00
69fc4da360
Add declarations for the sine tables used in wma.c (half window sizes: 128,
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256, 512, 1024 and 2048) to mdct.c. Make them accessible via dsputil.h. Make
wma.c use these shared tables.
Originally committed as revision 14758 to svn://svn.ffmpeg.org/ffmpeg/trunk
2008-08-14 14:40:16 +00:00
d46ac5bfde
mdct wrapper function to match fft
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Originally committed as revision 14703 to svn://svn.ffmpeg.org/ffmpeg/trunk
2008-08-12 00:38:30 +00:00
0a570e826d
remove mdct tmp buffer
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Originally committed as revision 14702 to svn://svn.ffmpeg.org/ffmpeg/trunk
2008-08-12 00:36:36 +00:00
e8dd7b0c9a
remove a float->double->float conversion.
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1.8x faster imdct_c with fpmath=sse, no change with x87
Originally committed as revision 14701 to svn://svn.ffmpeg.org/ffmpeg/trunk
2008-08-12 00:34:08 +00:00
46803f4f67
optimize imdct_half:
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remove tmp buffer.
skip fft reinterleave pass, leaving data in a format more convenient for simd.
merge post-rotate with post-reorder.
Originally committed as revision 14700 to svn://svn.ffmpeg.org/ffmpeg/trunk
2008-08-12 00:33:34 +00:00
b9fa32082c
exploit mdct symmetry
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2% faster vorbis on conroe, k8. 7% on celeron.
Originally committed as revision 14207 to svn://svn.ffmpeg.org/ffmpeg/trunk
2008-07-13 15:03:58 +00:00
9146e4d61c
Add generic ff_sine_window_init function and implement in codecs appropriately
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Originally committed as revision 13888 to svn://svn.ffmpeg.org/ffmpeg/trunk
2008-06-22 15:12:27 +00:00
77f11d8a4c
improve precision in mdct.c using double for some temporaries
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Originally committed as revision 12457 to svn://svn.ffmpeg.org/ffmpeg/trunk
2008-03-16 13:15:42 +00:00
3ed546fe52
Add variable alpha and size of half window for Kaiser-Bessel Derived window
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generation. Hard code Bessel I0 approximation iterations to 50.
See thread for discussion:
[FFmpeg-devel] [PATCH] Move Kaiser-Bessel Derived window to mdct.c
Started on the 2008/01/10
Originally committed as revision 11520 to svn://svn.ffmpeg.org/ffmpeg/trunk
2008-01-13 11:02:08 +00:00
4eb7a735cb
Make the Kaiser-Bessel window generator a common function
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Patch by Robert Swain, robert d swain a gmail d com
Originally committed as revision 11514 to svn://svn.ffmpeg.org/ffmpeg/trunk
2008-01-12 11:11:19 +00:00
b78e7197a8
Change license headers to say 'FFmpeg' instead of 'this program/this library'
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and fix GPL/LGPL version mismatches.
Originally committed as revision 6577 to svn://svn.ffmpeg.org/ffmpeg/trunk
2006-10-07 15:30:46 +00:00
5509bffa88
Update licensing information: The FSF changed postal address.
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Originally committed as revision 4842 to svn://svn.ffmpeg.org/ffmpeg/trunk
2006-01-12 22:43:26 +00:00
115329f160
COSMETICS: Remove all trailing whitespace.
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Originally committed as revision 4749 to svn://svn.ffmpeg.org/ffmpeg/trunk
2005-12-17 18:14:38 +00:00
68951ecf0c
fft_*() renamed into ff_fft_*() patch by (Gildas Bazin <gbazin at altern dot org>)
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Originally committed as revision 2882 to svn://svn.ffmpeg.org/ffmpeg/trunk
2004-03-13 21:43:24 +00:00
983e3246b7
per file doxy
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Originally committed as revision 1634 to svn://svn.ffmpeg.org/ffmpeg/trunk
2003-03-06 11:32:04 +00:00
d9823692f5
use av_malloc instead of malloc
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Originally committed as revision 1412 to svn://svn.ffmpeg.org/ffmpeg/trunk
2003-01-07 17:44:21 +00:00
82696beed3
avoid name clash
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Originally committed as revision 1104 to svn://svn.ffmpeg.org/ffmpeg/trunk
2002-10-29 22:26:01 +00:00
bb6f569072
new generic FFT/MDCT code for audio codecs
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Originally committed as revision 1088 to svn://svn.ffmpeg.org/ffmpeg/trunk
2002-10-28 00:34:08 +00:00
Reimar Döffinger
Siarhei Siamashka
Michael Niedermayer
Diego Biurrun
Alex Converse
Benjamin Larsson
Aurelien Jacobs
Robert Swain
Loren Merritt
Måns Rullgård
Gildas Bazin
Fabrice Bellard