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Diffstat (limited to '3rdparty/libflac/src/libFLAC/bitmath.c')
-rw-r--r-- | 3rdparty/libflac/src/libFLAC/bitmath.c | 149 |
1 files changed, 0 insertions, 149 deletions
diff --git a/3rdparty/libflac/src/libFLAC/bitmath.c b/3rdparty/libflac/src/libFLAC/bitmath.c deleted file mode 100644 index af19c35445a..00000000000 --- a/3rdparty/libflac/src/libFLAC/bitmath.c +++ /dev/null @@ -1,149 +0,0 @@ -/* libFLAC - Free Lossless Audio Codec library - * Copyright (C) 2001,2002,2003,2004,2005,2006,2007 Josh Coalson - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * - * - Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * - * - Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution. - * - * - Neither the name of the Xiph.org Foundation nor the names of its - * contributors may be used to endorse or promote products derived from - * this software without specific prior written permission. - * - * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS - * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT - * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR - * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR - * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, - * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, - * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR - * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF - * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING - * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS - * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. - */ - -#ifdef HAVE_CONFIG_H -# include <config.h> -#endif - -#include "private/bitmath.h" -#include "FLAC/assert.h" - -/* An example of what FLAC__bitmath_ilog2() computes: - * - * ilog2( 0) = assertion failure - * ilog2( 1) = 0 - * ilog2( 2) = 1 - * ilog2( 3) = 1 - * ilog2( 4) = 2 - * ilog2( 5) = 2 - * ilog2( 6) = 2 - * ilog2( 7) = 2 - * ilog2( 8) = 3 - * ilog2( 9) = 3 - * ilog2(10) = 3 - * ilog2(11) = 3 - * ilog2(12) = 3 - * ilog2(13) = 3 - * ilog2(14) = 3 - * ilog2(15) = 3 - * ilog2(16) = 4 - * ilog2(17) = 4 - * ilog2(18) = 4 - */ -unsigned FLAC__bitmath_ilog2(FLAC__uint32 v) -{ - unsigned l = 0; - FLAC__ASSERT(v > 0); - while(v >>= 1) - l++; - return l; -} - -unsigned FLAC__bitmath_ilog2_wide(FLAC__uint64 v) -{ - unsigned l = 0; - FLAC__ASSERT(v > 0); - while(v >>= 1) - l++; - return l; -} - -/* An example of what FLAC__bitmath_silog2() computes: - * - * silog2(-10) = 5 - * silog2(- 9) = 5 - * silog2(- 8) = 4 - * silog2(- 7) = 4 - * silog2(- 6) = 4 - * silog2(- 5) = 4 - * silog2(- 4) = 3 - * silog2(- 3) = 3 - * silog2(- 2) = 2 - * silog2(- 1) = 2 - * silog2( 0) = 0 - * silog2( 1) = 2 - * silog2( 2) = 3 - * silog2( 3) = 3 - * silog2( 4) = 4 - * silog2( 5) = 4 - * silog2( 6) = 4 - * silog2( 7) = 4 - * silog2( 8) = 5 - * silog2( 9) = 5 - * silog2( 10) = 5 - */ -unsigned FLAC__bitmath_silog2(int v) -{ - while(1) { - if(v == 0) { - return 0; - } - else if(v > 0) { - unsigned l = 0; - while(v) { - l++; - v >>= 1; - } - return l+1; - } - else if(v == -1) { - return 2; - } - else { - v++; - v = -v; - } - } -} - -unsigned FLAC__bitmath_silog2_wide(FLAC__int64 v) -{ - while(1) { - if(v == 0) { - return 0; - } - else if(v > 0) { - unsigned l = 0; - while(v) { - l++; - v >>= 1; - } - return l+1; - } - else if(v == -1) { - return 2; - } - else { - v++; - v = -v; - } - } -} |