FFmpeg

Commit Graph

Author	SHA1	Message	Date
Jai Luthra	0c023d181e	lavc/lpc: Add min_shift parameter in LPC The min_shift parameter is needed by the MLP encoder Signed-off-by: Jai Luthra <me@jailuthra.in> Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>	8 years ago
Ganesh Ajjanagadde	66edd8656b	lavc/lpc: exploit even symmetry of window function Yields 2x improvement in function performance, and boosts aac encoding speed by ~ 4% overall. Sample benchmark (Haswell+GCC under -march=native): after: ffmpeg -i sin.flac -acodec aac -y sin_new.aac 5.22s user 0.03s system 105% cpu 4.970 total before: ffmpeg -i sin.flac -acodec aac -y sin_new.aac 5.40s user 0.05s system 105% cpu 5.162 total Reviewed-by: Rostislav Pehlivanov <atomnuker@gmail.com> Signed-off-by: Ganesh Ajjanagadde <gajjanag@gmail.com>	9 years ago
Rostislav Pehlivanov	0cfdaf45c4	lpc: correctly apply windowing to the samples in the float-only lpc Also change the window to Hamming (using coefficient which make it a Hanning). Signed-off-by: Rostislav Pehlivanov <atomnuker@gmail.com>	9 years ago
Rostislav Pehlivanov	7591f8319b	lpc: increase error array size of ff_lpc_calc_ref_coefs_f by one Signed-off-by: Rostislav Pehlivanov <atomnuker@gmail.com>	9 years ago
Rostislav Pehlivanov	0fc3a51353	lpc: add ff_lpc_calc_ref_coefs_f() function This commit adds a function to get the reflection coefficients on floating point samples. It's functionally identical to ff_lpc_calc_ref_coefs() except it works on float samples and will return the global prediction gain. The Welch window implementation which is more optimized works only on int32_t samples so a slower generic expression was used. Signed-off-by: Rostislav Pehlivanov <atomnuker@gmail.com>	9 years ago
Rostislav Pehlivanov	a70ee2bdcd	lpc: remove unused ff_lpc_calc_levinson() function Not needed anymore, it was only used by the AAC TNS encoder and was replaced with a more suitable function in the following commit. Signed-off-by: Rostislav Pehlivanov <atomnuker@gmail.com>	9 years ago
Rostislav Pehlivanov	141d80ded7	lpc: rename ff_lpc_calc_levinsion to ff_lpc_calc_levinson Signed-off-by: Rostislav Pehlivanov <atomnuker@gmail.com>	9 years ago
Rostislav Pehlivanov	20962b567b	lpc: create a simplified Levinson-Durbin LPC handling float samples This commit simply duplicates the functionality of ff_lpc_calc_coefs() for the case of a Levinson-Durbin LPC with the only difference being that floating point samples are accepted and the resulting coefficients are raw and unquantized. The motivation behind doing this is the fact that the AAC encoder requires LPC in TNS and LTP and converting non-normalized floating point coefficients to int32_t using SWR and again back for the LPC coefficients was very impractical. The current LPC interfaces were designed for int32_t in mind possibly because FLAC and ALAC use this type for most internal operations. The mathematics in case of floats remains of course identical. Signed-off-by: Rostislav Pehlivanov <atomnuker@gmail.com>	9 years ago
Michael Niedermayer	a3a61d4663	avcodec/lpc: Fix lpc_apply_welch_window_c() for odd len Also removes assert this fixes an assertion failure on non-x86 Signed-off-by: Michael Niedermayer <michaelni@gmx.at>	10 years ago
Reimar Döffinger	458aadf862	lpc: Reduce stack usage by allocating LLSModel in context. Signed-off-by: Reimar Döffinger <Reimar.Doeffinger@gmx.de>	10 years ago
Vittorio Giovara	60e0ee7ca2	lpc: always initialize ref and err CC: libav-stable@libav.org Bug-Id: CID 29585 / CID 700759	10 years ago
Michael Niedermayer	70b8668fb5	drop LLS1, rename LLS2 to LLS Signed-off-by: Michael Niedermayer <michaelni@gmx.at>	11 years ago
Michael Niedermayer	c3814ab654	rename new lls code to lls2 to avoid conflict with the old which has a different ABI also remove failed attempt at a compatibility layer, the code simply cannot work Signed-off-by: Michael Niedermayer <michaelni@gmx.at>	11 years ago
Michael Niedermayer	bbe66ef912	avutil: rename lls to lls2 Signed-off-by: Michael Niedermayer <michaelni@gmx.at>	11 years ago
Michael Niedermayer	0dd99628ea	ff_lpc_calc_coefs: assert that the type is levinson or cholesky Otherwise the code could misbehave (and there are no other types anyway) Fixes CID700759 Signed-off-by: Michael Niedermayer <michaelni@gmx.at>	12 years ago
Loren Merritt	1221bb6239	x86: lpc: fix a segfault in av_evaluate_lls_sse2()	12 years ago
Michael Niedermayer	e27be795f0	avcodec/lpc: Use a function pointer from an initialized context Fixes null pointer dereference Signed-off-by: Michael Niedermayer <michaelni@gmx.at>	12 years ago
Loren Merritt	c93ccf5a4c	lpc: use levinson for the first pass of multipass cholesky Levinson is faster, and cholesky is only needed if we want to apply different weights to different samples, which doesn't happen on the first pass. Signed-off-by: Luca Barbato <lu_zero@gentoo.org>	12 years ago
Loren Merritt	502ab21af0	x86: lpc: simd av_update_lls 4x-6x faster on sandybridge Signed-off-by: Luca Barbato <lu_zero@gentoo.org>	12 years ago
Loren Merritt	41578f70cf	lpc: use function pointers, in preparation for asm Signed-off-by: Luca Barbato <lu_zero@gentoo.org>	12 years ago
Loren Merritt	cc6714bb16	lpc: remove "decay" argument We never used the rolling-average mode, and this makes av_update_lls 15% faster. Signed-off-by: Luca Barbato <lu_zero@gentoo.org>	12 years ago
Luca Barbato	9d4da474f5	lls: move to the private namespace The functions are private.	12 years ago
Martin Storsjö	8b25a20efb	lpc: Add a function for calculating reflection coefficients from samples Signed-off-by: Martin Storsjö <martin@martin.st>	12 years ago
Michael Niedermayer	c4a36b6f70	lpc: check that lpc_type is valid in ff_lpc_calc_coefs Fixes CID700759 Signed-off-by: Michael Niedermayer <michaelni@gmx.at>	12 years ago
Janne Grunau	f101eab1be	x86: call most of the x86 dsp init functions under if (ARCH_X86) Rename the called dsp init functions to *_init_x86.	12 years ago
Justin Ruggles	4b0e0f31bf	lpc: fix alignment of windowed samples for odd maximum LPC order Fixes crash on x86 due to alignment requirements for w_data in lpc_apply_welch_window_sse2().	13 years ago
Martin Storsjö	1d9c2dc89a	Don't include common.h from avutil.h Signed-off-by: Martin Storsjö <martin@martin.st>	13 years ago
Michael Niedermayer	894319e010	lpc: use default number of passes when lpc_passes is invalid Should fix valgrind failure (uninitialized vars) Signed-off-by: Michael Niedermayer <michaelni@gmx.at>	13 years ago
Michael Niedermayer	b1a17953ec	lpc: use av_assert Signed-off-by: Michael Niedermayer <michaelni@gmx.at>	13 years ago
Diego Biurrun	32f3c541bc	doxygen: Do not include license boilerplates in Doxygen comment blocks.	13 years ago
Diego Biurrun	c18365402b	Replace Subversion revisions in comments by Git hashes.	13 years ago
Diego Biurrun	96c1e6d40d	doxygen: Make sure parameter names match between .c and .h files.	14 years ago
Diego Biurrun	24c9babaaf	doxygen: Fix parameter names to match the function prototypes.	14 years ago
Anton Khirnov	188dea1dbf	lavc: move some flac-specific options to its private context.	14 years ago
Mans Rullgard	2912e87a6c	Replace FFmpeg with Libav in licence headers Signed-off-by: Mans Rullgard <mans@mansr.com>	14 years ago
Justin Ruggles	384dbd617f	cosmetics related to LPC changes. Signed-off-by: Mans Rullgard <mans@mansr.com> (cherry picked from commit `1c189fc533`)	14 years ago
Justin Ruggles	7101b18508	Separate window function from autocorrelation. Signed-off-by: Mans Rullgard <mans@mansr.com> (cherry picked from commit `77a78e9bdc`)	14 years ago
Justin Ruggles	0d8837bdda	Move lpc_compute_autocorr() from DSPContext to a new struct LPCContext. Signed-off-by: Mans Rullgard <mans@mansr.com> (cherry picked from commit `56f8952b25`)	14 years ago
Justin Ruggles	1c189fc533	cosmetics related to LPC changes. Signed-off-by: Mans Rullgard <mans@mansr.com>	14 years ago
Justin Ruggles	77a78e9bdc	Separate window function from autocorrelation. Signed-off-by: Mans Rullgard <mans@mansr.com>	14 years ago
Justin Ruggles	56f8952b25	Move lpc_compute_autocorr() from DSPContext to a new struct LPCContext. Signed-off-by: Mans Rullgard <mans@mansr.com>	14 years ago
Justin Ruggles	23940f1405	Add AVCodecContext.lpc_type and Add AVCodecContext.lpc_passes fields. Add AVLPCType enum. Deprecate AVCodecContext.use_lpc. Originally committed as revision 24199 to svn://svn.ffmpeg.org/ffmpeg/trunk	15 years ago
Måns Rullgård	49bd8e4b84	Fix grammar errors in documentation Originally committed as revision 23904 to svn://svn.ffmpeg.org/ffmpeg/trunk	15 years ago
Justin Ruggles	fde82ca7e4	Move autocorrelation function from flacenc.c to lpc.c. Also rename the corresponding dsputil functions and remove their dependency on the FLAC encoder. Fixes Issue1486. Originally committed as revision 20266 to svn://svn.ffmpeg.org/ffmpeg/trunk	15 years ago
Patrik Kullman	3cfe88194a	lpc: Remove false positive compilation warning about weight being uninitialized. Patch by Patrik Kullman (patrik A yes D nu). Originally committed as revision 17218 to svn://svn.ffmpeg.org/ffmpeg/trunk	16 years ago
Patrik Kullman	eabe8c7033	Assert that ff_lpc_calc_coefs() is called with a valid LPC method. Patch by Patrik Kullman (patrik A yes D nu). Originally committed as revision 17217 to svn://svn.ffmpeg.org/ffmpeg/trunk	16 years ago
Patrik Kullman	83f63ffb22	lpc: Document the use_lpc parameter to ff_lpc_calc_coefs(). Patch by Patrik Kullman (patrik A yes D nu). Originally committed as revision 17216 to svn://svn.ffmpeg.org/ffmpeg/trunk	16 years ago
Vitor Sessak	1be0fc2909	Avoid duplicating compute_lpc_coefs() function in both the RA288 and AAC decoders. Originally committed as revision 15193 to svn://svn.ffmpeg.org/ffmpeg/trunk	17 years ago
Vitor Sessak	f6a1ca1dad	Misc cosmetics in compute_lpc_coefs(): braces removal and empty lines Originally committed as revision 15093 to svn://svn.ffmpeg.org/ffmpeg/trunk	17 years ago
Vitor Sessak	fc324cd523	Remove useless var in compute_lpc_coefs() Originally committed as revision 15091 to svn://svn.ffmpeg.org/ffmpeg/trunk	17 years ago

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74 Commits (9b26bf7e2a3904d0e4b80f8d771223d3045013db)