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28 Commits

Author SHA1 Message Date
Siarhei Siamashka
7d485f165f Support for getting (i)MDCT output multiplied by a constant scaling factor. 
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
Michael Niedermayer
b278a1ed1c Remove useless += from ff_imdct_half_c() found by CSA. 
Originally committed as revision 18578 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2009-04-17 18:12:00 +00:00
Diego Biurrun
f0d5437275 Remove documentation of non-existing function parameters. 
Originally committed as revision 16994 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2009-02-04 20:43:17 +00:00
Alex Converse
5363c43ea8 Add av_cold attributes to *_init and *_end functions. 
Originally committed as revision 16980 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2009-02-03 23:09:00 +00:00
Diego Biurrun
bad5537e2c Use full internal pathname in doxygen @file directives. 
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
Diego Biurrun
406792e7b0 cosmetics: Remove pointless period after copyright statement non-sentences. 
Originally committed as revision 16684 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2009-01-19 15:46:40 +00:00
Benjamin Larsson
336c2ca585 Add size that is needed for the wmapro codec 
Originally committed as revision 16533 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2009-01-11 10:40:05 +00:00
Michael Niedermayer
71375e0500 Try to fix wma regression. 
Originally committed as revision 15261 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2008-09-08 13:37:12 +00:00
Aurelien Jacobs
67f718bd11 Add a temp variable to ff_sine_window_init() to match the way wma.c computed 
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
Robert Swain
47698b83fd The ff_sine_#[] should be aligned as they will commonly be used in dsputil 
functions

Originally committed as revision 14767 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2008-08-14 22:12:19 +00:00
Robert Swain
69fc4da360 Add declarations for the sine tables used in wma.c (half window sizes: 128, 
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
Loren Merritt
d46ac5bfde mdct wrapper function to match fft 
Originally committed as revision 14703 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2008-08-12 00:38:30 +00:00
Loren Merritt
0a570e826d remove mdct tmp buffer 
Originally committed as revision 14702 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2008-08-12 00:36:36 +00:00
Loren Merritt
e8dd7b0c9a remove a float->double->float conversion. 
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
Loren Merritt
46803f4f67 optimize imdct_half: 
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
Loren Merritt
b9fa32082c exploit mdct symmetry 
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
Robert Swain
9146e4d61c Add generic ff_sine_window_init function and implement in codecs appropriately 
Originally committed as revision 13888 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2008-06-22 15:12:27 +00:00
Måns Rullgård
77f11d8a4c improve precision in mdct.c using double for some temporaries 
Originally committed as revision 12457 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2008-03-16 13:15:42 +00:00
Robert Swain
3ed546fe52 Add variable alpha and size of half window for Kaiser-Bessel Derived window 
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
Robert Swain
4eb7a735cb Make the Kaiser-Bessel window generator a common function 
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
Diego Biurrun
b78e7197a8 Change license headers to say 'FFmpeg' instead of 'this program/this library' 
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
Diego Biurrun
5509bffa88 Update licensing information: The FSF changed postal address. 
Originally committed as revision 4842 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2006-01-12 22:43:26 +00:00
Diego Biurrun
115329f160 COSMETICS: Remove all trailing whitespace. 
Originally committed as revision 4749 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2005-12-17 18:14:38 +00:00
Gildas Bazin
68951ecf0c fft_*() renamed into ff_fft_*() patch by (Gildas Bazin <gbazin at altern dot org>) 
Originally committed as revision 2882 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2004-03-13 21:43:24 +00:00
Michael Niedermayer
983e3246b7 per file doxy 
Originally committed as revision 1634 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2003-03-06 11:32:04 +00:00
Fabrice Bellard
d9823692f5 use av_malloc instead of malloc 
Originally committed as revision 1412 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2003-01-07 17:44:21 +00:00
Fabrice Bellard
82696beed3 avoid name clash 
Originally committed as revision 1104 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2002-10-29 22:26:01 +00:00
Fabrice Bellard
bb6f569072 new generic FFT/MDCT code for audio codecs 
Originally committed as revision 1088 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2002-10-28 00:34:08 +00:00