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author | Ramiro Polla <ramiro.polla@gmail.com> | 2008-08-16 17:18:20 +0000 |
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committer | Ramiro Polla <ramiro.polla@gmail.com> | 2008-08-16 17:18:20 +0000 |
commit | c50da3ad6c5ee316bafd38170172dcc6c3163764 (patch) | |
tree | a14e1737b60d336d2a498bd8dc3a689b17f33fb4 /libavcodec/lpc.h | |
parent | 51c796d012b6494f4937e794db9ed05e05d970c4 (diff) | |
download | ffmpeg-c50da3ad6c5ee316bafd38170172dcc6c3163764.tar.gz |
flacenc, lpc: Move LPC code from flacenc.c to new lpc.[ch] files.
Originally committed as revision 14790 to svn://svn.ffmpeg.org/ffmpeg/trunk
Diffstat (limited to 'libavcodec/lpc.h')
-rw-r--r-- | libavcodec/lpc.h | 46 |
1 files changed, 46 insertions, 0 deletions
diff --git a/libavcodec/lpc.h b/libavcodec/lpc.h new file mode 100644 index 0000000000..db1a6432ec --- /dev/null +++ b/libavcodec/lpc.h @@ -0,0 +1,46 @@ +/** + * LPC utility code + * Copyright (c) 2006 Justin Ruggles <jruggle@earthlink.net> + * + * This file is part of FFmpeg. + * + * FFmpeg is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; either + * version 2.1 of the License, or (at your option) any later version. + * + * FFmpeg is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with FFmpeg; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA + */ + +#ifndef FFMPEG_LPC_H +#define FFMPEG_LPC_H + +#include <inttypes.h> + +#define ORDER_METHOD_EST 0 +#define ORDER_METHOD_2LEVEL 1 +#define ORDER_METHOD_4LEVEL 2 +#define ORDER_METHOD_8LEVEL 3 +#define ORDER_METHOD_SEARCH 4 +#define ORDER_METHOD_LOG 5 + +#define MIN_LPC_ORDER 1 +#define MAX_LPC_ORDER 32 + + +/** + * Calculate LPC coefficients for multiple orders + */ +int ff_lpc_calc_coefs(DSPContext *s, + const int32_t *samples, int blocksize, int max_order, + int precision, int32_t coefs[][MAX_LPC_ORDER], + int *shift, int use_lpc, int omethod, int max_shift, int zero_shift); + +#endif /* FFMPEG_LPC_H */ |