54 lines
2.6 KiB
C
54 lines
2.6 KiB
C
/**
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Copyright (C) powturbo 2013-2015
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GPL v2 License
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License along
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with this program; if not, write to the Free Software Foundation, Inc.,
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51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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- homepage : https://sites.google.com/site/powturbo/
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- github : https://github.com/powturbo
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- twitter : https://twitter.com/powturbo
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- email : powturbo [_AT_] gmail [_DOT_] com
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**/
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// vp4dc.h - "Integer Compression" TurboPfor (see vp4dd.h for decompression)
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#define P4DEB(__b) (__b << 1)
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#define P4DEBX(__b, __bx) (__bx << 8 | __b << 1 | 1)
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#define P4DSAVE(__out, __b, __bx) do { if(!__bx) *__out++ = P4DEB(__b);else *(unsigned short *)__out = P4DEBX(__b, __bx), __out += 2; } while(0)
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#ifdef __cplusplus
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extern "C" {
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#endif
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// compress integer array with n values to the buffer out. Return value = end of compressed buffer out
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unsigned char *p4denc32(unsigned *__restrict in, unsigned n, unsigned char *__restrict out);
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unsigned char *p4denc16(unsigned short *__restrict in, unsigned n, unsigned char *__restrict out);
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// SIMD compress integer array with n values to the buffer out. Return value = end of compressed buffer out
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unsigned char *p4dencv32(unsigned *__restrict in, unsigned n, unsigned char *__restrict out);
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//unsigned char *p4denc16(unsigned short *__restrict in, unsigned n, unsigned char *__restrict out);
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// calculate the best bit size b and bx.
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unsigned p4d32(unsigned *__restrict in, unsigned n, unsigned *pbx);
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unsigned p4d16(unsigned short *__restrict in, unsigned n, unsigned *pbx);
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// same as p4denc, but with b and bx as parameters. Call after p4d32/p4d16
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unsigned char *p4de32(unsigned *__restrict in, unsigned n, unsigned char *__restrict out, unsigned b, unsigned bx);
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unsigned char *p4de16(unsigned short *__restrict in, unsigned n, unsigned char *__restrict out, unsigned b, unsigned bx);
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unsigned char *p4dev32(unsigned *__restrict in, unsigned n, unsigned char *__restrict out, unsigned b, unsigned bx);
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#ifdef __cplusplus
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}
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#endif
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