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2013-08-04libavcodec: Implementation of 32 bit fixed point FFTNedeljko Babic
Iterative implementation of 32 bit fixed point split-radix FFT. Max FFT that can be calculated currently is 2^12. Signed-off-by: Nedeljko Babic <nbabic@mips.com> Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
2011-04-01Merge remote-tracking branch 'newdev/master'Michael Niedermayer
* newdev/master: mpegts: propagate avio EOF in read_packet() configure: Initial support for --target-os=symbian Fixed-point FFT and MDCT Include dependencies for test programs ac3enc: simplify sym_quant() flvdec: read index stored in the 'keyframes' tag. mov: Add support for zero-sized stsc runs. Merged-by: Michael Niedermayer <michaelni@gmx.at>
2011-03-31Fixed-point FFT and MDCTMans Rullgard
2011-03-21Merge remote-tracking branch 'newdev/master'Michael Niedermayer
Merged-by: Michael Niedermayer <michaelni@gmx.at>
2011-03-20Move sine windows to a separate fileMans Rullgard
These windows do not really belong in fft/mdct files and were easily confused with the similarly named tables used by rdft. Signed-off-by: Mans Rullgard <mans@mansr.com>
2011-03-19Move ff_kbd_window_init() to a separate fileMans Rullgard
This function is not tightly coupled to mdct, and it's in the way of making a fixed-point mdct implementation. Signed-off-by: Mans Rullgard <mans@mansr.com>
2011-03-19fft: remove inline wrappers for function pointersMans Rullgard
This removes the rather pointless wrappers (one not even inline) for calling the fft_calc and related function pointers. Signed-off-by: Mans Rullgard <mans@mansr.com>
2011-03-19Replace FFmpeg with Libav in licence headersMans Rullgard
Signed-off-by: Mans Rullgard <mans@mansr.com>
2011-02-18mdct: remove unnecessary multiplicationYoung Han Lee
3*n4 was already calculated in n3. (cherry picked from commit 979395bbbb9381b522b44c3448c24aef9c819ffc)
2011-02-17mdct: remove unnecessary multiplicationYoung Han Lee
3*n4 was already calculated in n3.
2011-02-15FFT: factor a shuffle out of the inner loop and merge it into fft_permute.Loren Merritt
6% faster SSE FFT on Conroe, 2.5% on Penryn. Signed-off-by: Janne Grunau <janne-ffmpeg@jannau.net> (cherry picked from commit e6b1ed693ae4098e6b9eabf938fc31ec0b09b120)
2011-02-13FFT: factor a shuffle out of the inner loop and merge it into fft_permute.Loren Merritt
6% faster SSE FFT on Conroe, 2.5% on Penryn. Signed-off-by: Janne Grunau <janne-ffmpeg@jannau.net>
2010-06-24Remove VLA in ff_kbd_window_init, limit window size to 1024Måns Rullgård
Originally committed as revision 23755 to svn://svn.ffmpeg.org/ffmpeg/trunk
2010-04-20Remove explicit filename from Doxygen @file commands.Diego Biurrun
Passing an explicit filename to this command is only necessary if the documentation in the @file block refers to a file different from the one the block resides in. Originally committed as revision 22921 to svn://svn.ffmpeg.org/ffmpeg/trunk
2010-03-09Replace many includes of libavutil/common.h with what is actually neededMåns Rullgård
This reduces the number of false dependencies on header files and speeds up compilation. Originally committed as revision 22407 to svn://svn.ffmpeg.org/ffmpeg/trunk
2010-03-06Move FFT parts from dsputil.h to fft.hMåns Rullgård
Originally committed as revision 22235 to svn://svn.ffmpeg.org/ffmpeg/trunk
2010-01-09Add support for hard-coded MDCT-related ff_sine_windows tables.Reimar Döffinger
Originally committed as revision 21108 to svn://svn.ffmpeg.org/ffmpeg/trunk
2009-09-21Allow arch-specific mdct code to request interleaving of cos/sin tablesMåns Rullgård
Originally committed as revision 19939 to svn://svn.ffmpeg.org/ffmpeg/trunk
2009-09-20Merge FFTContext and MDCTContextMåns Rullgård
Originally committed as revision 19931 to svn://svn.ffmpeg.org/ffmpeg/trunk
2009-09-15Add two more sizes to ff_sine_windows[] and also pad it with NULLs soVitor Sessak
that FF_ELEMS(ff_sine_windows[x]) == 1 << x. Fix issue 1384. Originally committed as revision 19862 to svn://svn.ffmpeg.org/ffmpeg/trunk
2009-09-11Prepare for optimised forward MDCT implementationsMåns Rullgård
This adds a function pointer for forward MDCT to FFTContext and initialises it with the existing C function. ff_calc_mdct() is changed to an inline function calling the selected version as done for other fft/mdct functions. Originally committed as revision 19818 to svn://svn.ffmpeg.org/ffmpeg/trunk
2009-09-06ff_sine_windows table contains only constant data, too.Reimar Döffinger
Originally committed as revision 19785 to svn://svn.ffmpeg.org/ffmpeg/trunk
2009-05-16Support for getting (i)MDCT output multiplied by a constant scaling factor.Siarhei Siamashka
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
2009-04-17Remove useless += from ff_imdct_half_c() found by CSA.Michael Niedermayer
Originally committed as revision 18578 to svn://svn.ffmpeg.org/ffmpeg/trunk
2009-02-04Remove documentation of non-existing function parameters.Diego Biurrun
Originally committed as revision 16994 to svn://svn.ffmpeg.org/ffmpeg/trunk
2009-02-04Add av_cold attributes to *_init and *_end functions.Alex Converse
Originally committed as revision 16980 to svn://svn.ffmpeg.org/ffmpeg/trunk
2009-02-01Use full internal pathname in doxygen @file directives.Diego Biurrun
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
2009-01-19cosmetics: Remove pointless period after copyright statement non-sentences.Diego Biurrun
Originally committed as revision 16684 to svn://svn.ffmpeg.org/ffmpeg/trunk
2009-01-11Add size that is needed for the wmapro codecBenjamin Larsson
Originally committed as revision 16533 to svn://svn.ffmpeg.org/ffmpeg/trunk
2008-09-08Try to fix wma regression.Michael Niedermayer
Originally committed as revision 15261 to svn://svn.ffmpeg.org/ffmpeg/trunk
2008-08-26Add a temp variable to ff_sine_window_init() to match the way wma.c computedAurelien Jacobs
window before r14757. This fixes a regression introduced by r14757 on amd64. Originally committed as revision 14982 to svn://svn.ffmpeg.org/ffmpeg/trunk
2008-08-15The ff_sine_#[] should be aligned as they will commonly be used in dsputilRobert Swain
functions Originally committed as revision 14767 to svn://svn.ffmpeg.org/ffmpeg/trunk
2008-08-14Add declarations for the sine tables used in wma.c (half window sizes: 128,Robert Swain
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
2008-08-12mdct wrapper function to match fftLoren Merritt
Originally committed as revision 14703 to svn://svn.ffmpeg.org/ffmpeg/trunk
2008-08-12remove mdct tmp bufferLoren Merritt
Originally committed as revision 14702 to svn://svn.ffmpeg.org/ffmpeg/trunk
2008-08-12remove a float->double->float conversion.Loren Merritt
1.8x faster imdct_c with fpmath=sse, no change with x87 Originally committed as revision 14701 to svn://svn.ffmpeg.org/ffmpeg/trunk
2008-08-12optimize imdct_half:Loren Merritt
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
2008-07-13exploit mdct symmetryLoren Merritt
2% faster vorbis on conroe, k8. 7% on celeron. Originally committed as revision 14207 to svn://svn.ffmpeg.org/ffmpeg/trunk
2008-06-22Add generic ff_sine_window_init function and implement in codecs appropriatelyRobert Swain
Originally committed as revision 13888 to svn://svn.ffmpeg.org/ffmpeg/trunk
2008-03-16improve precision in mdct.c using double for some temporariesMåns Rullgård
Originally committed as revision 12457 to svn://svn.ffmpeg.org/ffmpeg/trunk
2008-01-13Add variable alpha and size of half window for Kaiser-Bessel Derived windowRobert Swain
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
2008-01-12Make the Kaiser-Bessel window generator a common functionRobert Swain
Patch by Robert Swain, robert d swain a gmail d com Originally committed as revision 11514 to svn://svn.ffmpeg.org/ffmpeg/trunk
2006-10-07Change license headers to say 'FFmpeg' instead of 'this program/this library'Diego Biurrun
and fix GPL/LGPL version mismatches. Originally committed as revision 6577 to svn://svn.ffmpeg.org/ffmpeg/trunk
2006-01-13Update licensing information: The FSF changed postal address.Diego Biurrun
Originally committed as revision 4842 to svn://svn.ffmpeg.org/ffmpeg/trunk
2005-12-17COSMETICS: Remove all trailing whitespace.Diego Biurrun
Originally committed as revision 4749 to svn://svn.ffmpeg.org/ffmpeg/trunk
2004-03-14fft_*() renamed into ff_fft_*() patch by (Gildas Bazin <gbazin at altern dot ↵Gildas Bazin
org>) Originally committed as revision 2882 to svn://svn.ffmpeg.org/ffmpeg/trunk
2003-03-06per file doxyMichael Niedermayer
Originally committed as revision 1634 to svn://svn.ffmpeg.org/ffmpeg/trunk
2003-01-07use av_malloc instead of mallocFabrice Bellard
Originally committed as revision 1412 to svn://svn.ffmpeg.org/ffmpeg/trunk
2002-10-30avoid name clashFabrice Bellard
Originally committed as revision 1104 to svn://svn.ffmpeg.org/ffmpeg/trunk
2002-10-28new generic FFT/MDCT code for audio codecsFabrice Bellard
Originally committed as revision 1088 to svn://svn.ffmpeg.org/ffmpeg/trunk
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