mirror of https://github.com/FFmpeg/FFmpeg.git
Originally committed as revision 4489 to svn://svn.ffmpeg.org/ffmpeg/trunkpull/126/head
Alexander Strasser
20 years ago
parent
0cc64d3d1c
commit
c11c2bc20b
20 changed files with 369 additions and 175 deletions
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#
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# libavutil Makefile
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#
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include ../config.mak |
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VPATH=$(SRC_PATH)/libavutil
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# NOTE: -I.. is needed to include config.h
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CFLAGS=$(OPTFLAGS) -DHAVE_AV_CONFIG_H -I.. -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_GNU_SOURCE
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OBJS= mathematics.o \
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integer.o \
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rational.o \
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intfloat_readwrite.o \
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ifeq ($(TARGET_ARCH_SPARC64),yes) |
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CFLAGS+= -mcpu=ultrasparc -mtune=ultrasparc
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endif |
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SRCS := $(OBJS:.o=.c)
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LIB= $(LIBPREF)avutil$(LIBSUF)
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ifeq ($(BUILD_SHARED),yes) |
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SLIB= $(SLIBPREF)avutil$(SLIBSUF)
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endif |
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all: $(LIB) $(SLIB) |
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$(LIB): $(OBJS) |
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rm -f $@
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$(AR) rc $@ $(OBJS)
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$(RANLIB) $@
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$(SLIB): $(OBJS) |
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ifeq ($(CONFIG_WIN32),yes) |
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$(CC) $(SHFLAGS) -Wl,--output-def,$(@:.dll=.def) -o $@ $(OBJS) $(EXTRALIBS) $(AMREXTRALIBS)
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-lib /machine:i386 /def:$(@:.dll=.def)
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else |
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$(CC) $(SHFLAGS) -o $@ $(OBJS) $(EXTRALIBS) $(AMREXTRALIBS) $(LDFLAGS)
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endif |
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%.o: %.c |
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$(CC) $(CFLAGS) $(LIBOBJFLAGS) -c -o $@ $<
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depend: $(SRCS) |
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$(CC) -MM $(CFLAGS) $^ 1>.depend
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dep: depend |
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clean: |
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rm -f *.o *.d *~ .depend $(LIB) $(SLIB) *.so
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distclean: clean |
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rm -f Makefile.bak .depend
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ifeq ($(BUILD_SHARED),yes) |
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install: all install-headers |
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ifeq ($(CONFIG_WIN32),yes) |
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install $(INSTALLSTRIP) -m 755 $(SLIB) "$(prefix)"
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else |
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install -d $(libdir)
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install $(INSTALLSTRIP) -m 755 $(SLIB) $(libdir)/libavutil-$(VERSION).so
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ln -sf libavutil-$(VERSION).so $(libdir)/libavutil.so
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$(LDCONFIG) || true
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endif |
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else |
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install: |
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endif |
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installlib: all install-headers |
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install -m 644 $(LIB) "$(libdir)"
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install-headers: |
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mkdir -p "$(prefix)/include/ffmpeg"
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install -m 644 $(SRC_PATH)/libavutil/avutil.h \
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$(SRC_PATH)/libavutil/common.h \
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$(SRC_PATH)/libavutil/mathematics.h \
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$(SRC_PATH)/libavutil/integer.h \
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$(SRC_PATH)/libavutil/rational.h \
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$(SRC_PATH)/libavutil/intfloat_readwrite.h \
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"$(prefix)/include/ffmpeg"
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# install -d $(libdir)/pkgconfig
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# install -m 644 ../libavutil.pc $(libdir)/pkgconfig
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#
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# include dependency files if they exist
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#
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ifneq ($(wildcard .depend),) |
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include .depend |
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endif |
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@ -0,0 +1,34 @@ |
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#ifndef AVUTIL_H |
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#define AVUTIL_H |
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/**
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* @file avutil.h |
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* external api header. |
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*/ |
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#ifdef __cplusplus |
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extern "C" { |
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#endif |
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#define AV_STRINGIFY(s) AV_TOSTRING(s) |
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#define AV_TOSTRING(s) #s |
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#define LIBAVUTIL_VERSION_INT ((49<<16)+(0<<8)+0) |
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#define LIBAVUTIL_VERSION 49.0.0 |
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#define LIBAVUTIL_BUILD LIBAVUTIL_VERSION_INT |
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#define LIBAVUTIL_IDENT "Lavu" AV_STRINGIFY(LIBAVUTIL_VERSION) |
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#include "common.h" |
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#include "mathematics.h" |
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#include "rational.h" |
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#include "integer.h" |
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#include "intfloat_readwrite.h" |
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#ifdef __cplusplus |
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} |
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#endif |
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#endif /* AVUTIL_H */ |
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@ -0,0 +1,54 @@ |
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/*
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* portable IEEE float/double read/write functions |
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* |
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* Copyright (c) 2005 Michael Niedermayer <michaelni@gmx.at> |
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* |
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* This library is free software; you can redistribute it and/or |
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* modify it under the terms of the GNU Lesser General Public |
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* License as published by the Free Software Foundation; either |
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* version 2 of the License, or (at your option) any later version. |
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* |
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* This library 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 GNU |
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* Lesser General Public License for more details. |
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* |
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* You should have received a copy of the GNU Lesser General Public |
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* License along with this library; if not, write to the Free Software |
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
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*/ |
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/**
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* @file intfloat_readwrite.c |
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* Portable IEEE float/double read/write functions. |
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*/ |
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#include "common.h" |
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double av_int2dbl(int64_t v){ |
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if(v+v > 0xFFELLU<<52) |
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return 0.0/0.0; |
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return ldexp(((v&(1LL<<52)-1) + (1LL<<52)) * (v>>63|1), (v>>52&0x7FF)-1075); |
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} |
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float av_int2flt(int32_t v){ |
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if(v+v > 0xFF000000U) |
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return 0.0/0.0; |
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return ldexp(((v&0x7FFFFF) + (1<<23)) * (v>>31|1), (v>>23&0xFF)-150); |
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} |
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int64_t av_dbl2int(double d){ |
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int e; |
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if ( !d) return 0; |
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else if(d-d) return 0x7FF0000000000000LL + ((int64_t)(d<0)<<63) + (d!=d); |
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d= frexp(d, &e); |
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return (int64_t)(d<0)<<63 | (e+1022LL)<<52 | (int64_t)((fabs(d)-0.5)*(1LL<<53)); |
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} |
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int32_t av_flt2int(float d){ |
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int e; |
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if ( !d) return 0; |
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else if(d-d) return 0x7F800000 + ((d<0)<<31) + (d!=d); |
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d= frexp(d, &e); |
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return (d<0)<<31 | (e+126)<<23 | (int64_t)((fabs(d)-0.5)*(1<<24)); |
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} |
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@ -0,0 +1,11 @@ |
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#ifndef INTFLOAT_READWRITE_H |
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#define INTFLOAT_READWRITE_H |
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#include "common.h" |
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double av_int2dbl(int64_t v); |
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float av_int2flt(int32_t v); |
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int64_t av_dbl2int(double d); |
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int32_t av_flt2int(float d); |
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#endif /* INTFLOAT_READWRITE_H */ |
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@ -0,0 +1,84 @@ |
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/*
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* Copyright (c) 2005 Michael Niedermayer <michaelni@gmx.at> |
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* |
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* This library is free software; you can redistribute it and/or |
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* modify it under the terms of the GNU Lesser General Public |
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* License as published by the Free Software Foundation; either |
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* version 2 of the License, or (at your option) any later version. |
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* |
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* This library 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 GNU |
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* Lesser General Public License for more details. |
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* |
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* You should have received a copy of the GNU Lesser General Public |
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* License along with this library; if not, write to the Free Software |
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
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*/ |
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/**
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* @file mathematics.c |
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* Miscellaneous math routines and tables. |
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*/ |
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#include "common.h" |
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#include "integer.h" |
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#include "mathematics.h" |
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const uint8_t ff_sqrt_tab[128]={ |
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0, 1, 1, 1, 2, 2, 2, 2, 2, 3, 3, 3, 3, 3, 3, 3, 4, 4, 4, 4, 4, 4, 4, 4, 4, 5, 5, 5, 5, 5, 5, 5, |
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5, 5, 5, 5, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, |
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8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, |
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9, 9, 9, 9,10,10,10,10,10,10,10,10,10,10,10,10,10,10,10,10,10,10,10,10,10,11,11,11,11,11,11,11 |
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}; |
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const uint8_t ff_log2_tab[256]={ |
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0,0,1,1,2,2,2,2,3,3,3,3,3,3,3,3,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4, |
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5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5, |
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6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6, |
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6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6, |
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7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7, |
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7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7, |
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7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7, |
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7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7 |
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}; |
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int64_t ff_gcd(int64_t a, int64_t b){ |
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if(b) return ff_gcd(b, a%b); |
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else return a; |
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} |
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int64_t av_rescale_rnd(int64_t a, int64_t b, int64_t c, enum AVRounding rnd){ |
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AVInteger ai; |
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int64_t r=0; |
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assert(c > 0); |
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assert(b >=0); |
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assert(rnd >=0 && rnd<=5 && rnd!=4); |
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if(a<0 && a != INT64_MIN) return -av_rescale_rnd(-a, b, c, rnd ^ ((rnd>>1)&1));
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if(rnd==AV_ROUND_NEAR_INF) r= c/2; |
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else if(rnd&1) r= c-1; |
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if(b<=INT_MAX && c<=INT_MAX){ |
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if(a<=INT_MAX) |
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return (a * b + r)/c; |
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else |
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return a/c*b + (a%c*b + r)/c; |
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} |
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ai= av_mul_i(av_int2i(a), av_int2i(b)); |
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ai= av_add_i(ai, av_int2i(r)); |
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return av_i2int(av_div_i(ai, av_int2i(c))); |
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} |
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int64_t av_rescale(int64_t a, int64_t b, int64_t c){ |
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return av_rescale_rnd(a, b, c, AV_ROUND_NEAR_INF); |
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} |
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int64_t av_rescale_q(int64_t a, AVRational bq, AVRational cq){ |
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int64_t b= bq.num * (int64_t)cq.den; |
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int64_t c= cq.num * (int64_t)bq.den; |
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return av_rescale_rnd(a, b, c, AV_ROUND_NEAR_INF); |
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} |
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@ -0,0 +1,31 @@ |
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#ifndef MATHEMATICS_H |
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#define MATHEMATICS_H |
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#include "rational.h" |
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enum AVRounding { |
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AV_ROUND_ZERO = 0, ///< round toward zero
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AV_ROUND_INF = 1, ///< round away from zero
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AV_ROUND_DOWN = 2, ///< round toward -infinity
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AV_ROUND_UP = 3, ///< round toward +infinity
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AV_ROUND_NEAR_INF = 5, ///< round to nearest and halfway cases away from zero
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}; |
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/**
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* rescale a 64bit integer with rounding to nearest. |
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* a simple a*b/c isn't possible as it can overflow |
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*/ |
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int64_t av_rescale(int64_t a, int64_t b, int64_t c); |
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/**
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* rescale a 64bit integer with specified rounding. |
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* a simple a*b/c isn't possible as it can overflow |
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*/ |
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int64_t av_rescale_rnd(int64_t a, int64_t b, int64_t c, enum AVRounding); |
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/**
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* rescale a 64bit integer by 2 rational numbers. |
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*/ |
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int64_t av_rescale_q(int64_t a, AVRational bq, AVRational cq); |
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#endif /* MATHEMATICS_H */ |
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