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| author | Michael Niedermayer <michaelni@gmx.at> | 2012-10-30 14:40:22 +0100 |
|---|---|---|
| committer | Michael Niedermayer <michaelni@gmx.at> | 2012-10-30 14:40:22 +0100 |
| commit | e79c3858b35fcc77c68c33b627958e736686957e (patch) | |
| tree | 5f933517c2909def4e2930a409b0a460eb4f41fd /libavcodec/lpc.c | |
| parent | cd37963684d8ee9819af15ccebe09d84839101dd (diff) | |
| parent | 14f031d7ecfabba0ef02776d4516aa3dcb7c40d8 (diff) | |
| download | ffmpeg-e79c3858b35fcc77c68c33b627958e736686957e.tar.gz | |
Merge commit '14f031d7ecfabba0ef02776d4516aa3dcb7c40d8'
* commit '14f031d7ecfabba0ef02776d4516aa3dcb7c40d8':
dv: use AVStream.index instead of abusing AVStream.id
lavfi: add ashowinfo filter
avcodec: Add a RFC 3389 comfort noise codec
lpc: Add a function for calculating reflection coefficients from samples
lpc: Add a function for calculating reflection coefficients from autocorrelation coefficients
lavr: document upper bound on number of output samples.
lavr: add general API usage doxy
indeo3: remove duplicate capabilities line.
fate: ac3: Add dependencies
Conflicts:
Changelog
doc/filters.texi
libavcodec/Makefile
libavcodec/allcodecs.c
libavcodec/avcodec.h
libavcodec/codec_desc.c
libavcodec/version.h
libavfilter/Makefile
libavfilter/af_ashowinfo.c
libavfilter/allfilters.c
libavfilter/version.h
libavutil/avutil.h
Merged-by: Michael Niedermayer <michaelni@gmx.at>
Diffstat (limited to 'libavcodec/lpc.c')
| -rw-r--r-- | libavcodec/lpc.c | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/libavcodec/lpc.c b/libavcodec/lpc.c index 5ccd5a8e08..019689a247 100644 --- a/libavcodec/lpc.c +++ b/libavcodec/lpc.c @@ -149,6 +149,18 @@ static int estimate_best_order(double *ref, int min_order, int max_order) return est; } +int ff_lpc_calc_ref_coefs(LPCContext *s, + const int32_t *samples, int order, double *ref) +{ + double autoc[MAX_LPC_ORDER + 1]; + + s->lpc_apply_welch_window(samples, s->blocksize, s->windowed_samples); + s->lpc_compute_autocorr(s->windowed_samples, s->blocksize, order, autoc); + compute_ref_coefs(autoc, order, ref, NULL); + + return order; +} + /** * Calculate LPC coefficients for multiple orders * |