mirror of
https://github.com/vgmstream/vgmstream.git
synced 2024-11-24 15:00:11 +01:00
Merge pull request #992 from KatieFrogs/cmake-celt-linux
Cmake: Build celt for Linux and wasm target
This commit is contained in:
bnnm
GitHub
commit
b0566887a4
@ -51,10 +51,7 @@ option(USE_MAIATRAC3PLUS "Use MAIATRAC3+ for support of ATRAC3+" OFF)
|
||||
option(USE_G7221 "Use G7221 for support of ITU-T G.722.1 annex C" ON)
|
||||
option(USE_G719 "Use libg719_decode for support ITU-T G.719" ON)
|
||||
option(USE_ATRAC9 "Use LibAtrac9 for support of ATRAC9" ON)
|
||||
if(WIN32)
|
||||
# May need to see if it is possible to get these to work on non-Windows systems too
|
||||
option(USE_CELT "Use libcelt for support of FSB CELT versions 0.6.1 and 0.11.0" ON)
|
||||
endif()
|
||||
option(USE_CELT "Use libcelt for support of FSB CELT versions 0.6.1 and 0.11.0" ON)
|
||||
option(USE_SPEEX "Use libspeex for support of SPEEX" ON)
|
||||
if(NOT WIN32)
|
||||
option(USE_JANSSON "Use jansson for JSON dumping" ON)
|
||||
@ -69,6 +66,8 @@ if(NOT WIN32)
|
||||
set(G719_PATH CACHE PATH "Path to G.719 decoder")
|
||||
set(ATRAC9_PATH CACHE PATH "Path to LibAtrac9")
|
||||
set(SPEEX_PATH CACHE PATH "Path to SPEEX")
|
||||
set(CELT0061_PATH CACHE PATH "Path to CELT version 0.6.1")
|
||||
set(CELT0110_PATH CACHE PATH "Path to CELT version 0.11.0")
|
||||
set(LIBAO_PATH CACHE PATH "Path to libao")
|
||||
endif()
|
||||
|
||||
@ -144,11 +143,13 @@ include(FetchDependency)
|
||||
|
||||
include(dependencies/ffmpeg)
|
||||
include(dependencies/mpg123)
|
||||
include(dependencies/ogg)
|
||||
include(dependencies/vorbis)
|
||||
include(dependencies/libao)
|
||||
include(dependencies/maitrac3plus)
|
||||
include(dependencies/g719)
|
||||
include(dependencies/atrac9)
|
||||
include(dependencies/celt)
|
||||
include(dependencies/speex)
|
||||
include(dependencies/jansson)
|
||||
include(dependencies/audacious)
|
||||
@ -262,9 +263,7 @@ message(STATUS " MAIATRAC3+: ${USE_MAIATRAC3PLUS} ${MAIATRAC3PLUS_SOURCE}")
|
||||
message(STATUS " G.722.1: ${USE_G7221} ${G7221_SOURCE}")
|
||||
message(STATUS " G.719: ${USE_G719} ${G719_SOURCE}")
|
||||
message(STATUS " ATRAC9: ${USE_ATRAC9} ${ATRAC9_SOURCE}")
|
||||
if(WIN32)
|
||||
message(STATUS " FSB CELT: ${USE_CELT}")
|
||||
endif()
|
||||
message(STATUS " FSB CELT: ${USE_CELT} ${CELT_SOURCE}")
|
||||
message(STATUS " SPEEX: ${USE_SPEEX} ${SPEEX_SOURCE}")
|
||||
if(NOT WIN32)
|
||||
message(STATUS " LIBAO: ${BUILD_V123} ${LIBAO_SOURCE}")
|
||||
|
||||
165
cmake/dependencies/celt.cmake
Normal file
165
cmake/dependencies/celt.cmake
Normal file
@ -0,0 +1,165 @@
|
||||
if(NOT WIN32 AND USE_CELT)
|
||||
FetchDependency(CELT_0061
|
||||
DIR celt-0061
|
||||
FETCH_PRIORITY file git
|
||||
|
||||
FILE_DOWNLOAD https://downloads.xiph.org/releases/celt/celt-0.6.1.tar.gz
|
||||
FILE_SUBDIR celt-0.6.1
|
||||
|
||||
GIT_REPOSITORY https://gitlab.xiph.org/xiph/celt
|
||||
GIT_TAG 8ccf148573277b983692e15d5f0753081f806bea
|
||||
)
|
||||
FetchDependency(CELT_0110
|
||||
DIR celt-0110
|
||||
FETCH_PRIORITY file git
|
||||
|
||||
FILE_DOWNLOAD https://downloads.xiph.org/releases/celt/celt-0.11.0.tar.gz
|
||||
FILE_SUBDIR celt-0.11.0
|
||||
|
||||
GIT_REPOSITORY https://gitlab.xiph.org/xiph/celt
|
||||
GIT_TAG 0b405d1170122c859faab435405666506d52fa2e
|
||||
)
|
||||
if(CELT_0061_PATH AND CELT_0110_PATH)
|
||||
set(CELT_0061_LINK_PATH ${CELT_0061_BIN}/libcelt/.libs/libcelt.a)
|
||||
set(CELT_0110_LINK_PATH ${CELT_0110_BIN}/libcelt/.libs/libcelt0.a)
|
||||
|
||||
configure_file(
|
||||
${VGM_SOURCE_DIR}/ext_libs/celt-0110/ecintrin.h
|
||||
${CELT_0110_PATH}/libcelt/ecintrin.h
|
||||
COPYONLY)
|
||||
|
||||
set(CELT_CFLAGS
|
||||
alg_quant
|
||||
alg_unquant
|
||||
celt_decode
|
||||
celt_decoder_create
|
||||
celt_decoder_create_custom
|
||||
celt_decoder_destroy
|
||||
celt_mode_create
|
||||
celt_mode_destroy
|
||||
celt_mode_info
|
||||
celt_encoder_destroy
|
||||
celt_encoder_create
|
||||
celt_encode
|
||||
celt_encode_float
|
||||
celt_encoder_ctl
|
||||
celt_decode_float
|
||||
celt_decoder_ctl
|
||||
compute_allocation
|
||||
compute_band_energies
|
||||
denormalise_bands
|
||||
ec_dec_init
|
||||
ec_decode
|
||||
ec_decode_bin
|
||||
ec_dec_update
|
||||
ec_dec_uint
|
||||
ec_dec_bits
|
||||
ec_enc_init
|
||||
ec_encode
|
||||
ec_encode_bin
|
||||
ec_enc_uint
|
||||
ec_enc_bits
|
||||
ec_enc_done
|
||||
normalise_bands
|
||||
renormalise_vector
|
||||
quant_coarse_energy
|
||||
quant_fine_energy
|
||||
quant_energy_finalise
|
||||
unquant_coarse_energy
|
||||
unquant_energy_finalise
|
||||
unquant_fine_energy
|
||||
eMeans
|
||||
encode_pulses
|
||||
decode_pulses
|
||||
ec_laplace_encode
|
||||
ec_laplace_decode
|
||||
celt_decoder_get_size
|
||||
celt_decoder_init
|
||||
ec_dec_bit_logp
|
||||
ec_dec_icdf
|
||||
ec_enc_bit_logp
|
||||
ec_enc_icdf
|
||||
ec_enc_shrink
|
||||
_celt_lpc
|
||||
_celt_autocorr
|
||||
amp2Log2
|
||||
stereo_itheta
|
||||
anti_collapse
|
||||
spreading_decision
|
||||
haar1
|
||||
quant_all_bands
|
||||
log2_frac
|
||||
icwrs
|
||||
get_required_bits
|
||||
ec_ilog
|
||||
mdct_forward
|
||||
mdct_backward
|
||||
mdct_init
|
||||
mdct_clear
|
||||
)
|
||||
|
||||
foreach(ver 0061 0110)
|
||||
foreach(source ${CELT_CFLAGS})
|
||||
string(REGEX REPLACE "^([^_]+)" "\\1_${ver}" target ${source})
|
||||
if(source STREQUAL ${target})
|
||||
set(target "${source}_${ver}")
|
||||
endif()
|
||||
list(APPEND CELT_${ver}_CFLAGS "-D${source}=${target}")
|
||||
endforeach()
|
||||
list(APPEND CELT_${ver}_CFLAGS "-fPIC")
|
||||
|
||||
set(CELT_${ver}_CONF
|
||||
--enable-static
|
||||
--disable-shared
|
||||
--disable-oggtest
|
||||
CC="${CMAKE_C_COMPILER}"
|
||||
AR="${CMAKE_AR}"
|
||||
CFLAGS="${CELT_${ver}_CFLAGS}"
|
||||
)
|
||||
if(ver STREQUAL "0110")
|
||||
list(APPEND CELT_${ver}_CONF --enable-custom-modes)
|
||||
endif()
|
||||
|
||||
if(NOT EXISTS ${CELT_${ver}_PATH}/configure)
|
||||
add_custom_target(CELT_${ver}_AUTOGEN
|
||||
COMMAND ./autogen.sh
|
||||
BYPRODUCTS ${CELT_${ver}_PATH}/configure
|
||||
WORKING_DIRECTORY ${CELT_${ver}_PATH}
|
||||
)
|
||||
endif()
|
||||
|
||||
file(MAKE_DIRECTORY ${CELT_${ver}_BIN})
|
||||
add_custom_target(CELT_${ver}_CONFIGURE
|
||||
COMMAND "${CELT_${ver}_PATH}/configure" ${CELT_${ver}_CONF}
|
||||
DEPENDS ${CELT_${ver}_PATH}/configure
|
||||
BYPRODUCTS ${CELT_${ver}_BIN}/Makefile
|
||||
WORKING_DIRECTORY ${CELT_${ver}_BIN}
|
||||
)
|
||||
add_custom_target(CELT_${ver}_MAKE
|
||||
COMMAND make SUBDIRS=libcelt DIST_SUBDIRS=libcelt
|
||||
DEPENDS ${CELT_${ver}_BIN}/Makefile
|
||||
BYPRODUCTS ${CELT_${ver}_LINK_PATH} ${CELT_${ver}_BIN}
|
||||
WORKING_DIRECTORY ${CELT_${ver}_BIN}
|
||||
)
|
||||
|
||||
add_library(celt${ver} STATIC IMPORTED)
|
||||
if(NOT EXISTS ${CELT_${ver}_LINK_PATH})
|
||||
add_dependencies(celt${ver} CELT_${ver}_MAKE)
|
||||
endif()
|
||||
set_target_properties(celt${ver} PROPERTIES
|
||||
IMPORTED_LOCATION ${CELT_${ver}_LINK_PATH}
|
||||
)
|
||||
endforeach()
|
||||
else()
|
||||
set(USE_CELT OFF)
|
||||
endif()
|
||||
endif()
|
||||
if(USE_CELT)
|
||||
if(CELT_0061_SOURCE STREQUAL "${CELT_0110_SOURCE}")
|
||||
set(CELT_SOURCE ${CELT_0061_SOURCE})
|
||||
else()
|
||||
set(CELT_SOURCE "v0.6.1: ${CELT_0061_SOURCE}, v0.11.0: ${CELT_0110_SOURCE}")
|
||||
endif()
|
||||
else()
|
||||
unset(CELT_SOURCE)
|
||||
endif()
|
||||
@ -10,7 +10,7 @@ if(NOT WIN32 AND USE_G719)
|
||||
${VGM_SOURCE_DIR}/ext_libs/libg719_decode/CMakeLists.txt
|
||||
${G719_PATH}/CMakeLists.txt
|
||||
COPYONLY)
|
||||
add_subdirectory(${G719_PATH} ${G719_BIN})
|
||||
add_subdirectory(${G719_PATH} ${G719_BIN} EXCLUDE_FROM_ALL)
|
||||
endif()
|
||||
endif()
|
||||
if(NOT USE_G719)
|
||||
|
||||
@ -16,7 +16,7 @@ if(USE_MAIATRAC3PLUS)
|
||||
${MAIATRAC3PLUS_PATH}/MaiAT3PlusDecoder/src/base/Mai_mem.cc
|
||||
${MAIATRAC3PLUS_PATH}/MaiAT3PlusDecoder/src/base/Mai_Mem.cc
|
||||
COPYONLY)
|
||||
add_subdirectory(${MAIATRAC3PLUS_PATH}/MaiAT3PlusDecoder ${MAIATRAC3PLUS_BIN})
|
||||
add_subdirectory(${MAIATRAC3PLUS_PATH}/MaiAT3PlusDecoder ${MAIATRAC3PLUS_BIN} EXCLUDE_FROM_ALL)
|
||||
else()
|
||||
message(FATAL_ERROR "Path to MAIATRAC3+ must be set. (Use MAIATRAC3PLUS_PATH)")
|
||||
endif()
|
||||
|
||||
25
cmake/dependencies/ogg.cmake
Normal file
25
cmake/dependencies/ogg.cmake
Normal file
@ -0,0 +1,25 @@
|
||||
if(NOT WIN32 AND USE_VORBIS)
|
||||
if(NOT OGG_PATH)
|
||||
find_package(Ogg QUIET)
|
||||
|
||||
if(OGG_FOUND)
|
||||
set(OGG_SOURCE "(system)")
|
||||
endif()
|
||||
endif()
|
||||
if(OGG_PATH OR NOT OGG_FOUND)
|
||||
FetchDependency(OGG
|
||||
DIR ogg
|
||||
GIT_REPOSITORY https://gitlab.xiph.org/xiph/ogg
|
||||
GIT_TAG v1.3.5
|
||||
)
|
||||
|
||||
if(OGG_PATH)
|
||||
add_subdirectory(${OGG_PATH} ${OGG_BIN} EXCLUDE_FROM_ALL)
|
||||
set(OGG_INCLUDE_DIR ${OGG_PATH}/include ${OGG_BIN}/include)
|
||||
set(OGG_LIBRARY ogg)
|
||||
endif()
|
||||
endif()
|
||||
endif()
|
||||
if(NOT OGG_PATH)
|
||||
unset(OGG_SOURCE)
|
||||
endif()
|
||||
@ -26,7 +26,7 @@ if(NOT WIN32 AND USE_SPEEX)
|
||||
|
||||
file(MAKE_DIRECTORY ${SPEEX_BIN})
|
||||
add_custom_target(SPEEX_CONFIGURE
|
||||
COMMAND "${SPEEX_PATH}/configure" --enable-static --disable-shared --disable-binaries CC="${CMAKE_C_COMPILER}" AR="${CMAKE_AR}"
|
||||
COMMAND "${SPEEX_PATH}/configure" --enable-static --disable-shared --disable-binaries CC="${CMAKE_C_COMPILER}" AR="${CMAKE_AR}" RANLIB="${CMAKE_RANLIB}"
|
||||
DEPENDS ${SPEEX_PATH}/configure
|
||||
BYPRODUCTS ${SPEEX_BIN}/Makefile
|
||||
WORKING_DIRECTORY ${SPEEX_BIN}
|
||||
|
||||
@ -1,29 +1,20 @@
|
||||
if(NOT WIN32 AND USE_VORBIS)
|
||||
if(NOT VORBIS_PATH OR NOT OGG_PATH)
|
||||
if(NOT VORBIS_PATH)
|
||||
find_package(VorbisFile QUIET)
|
||||
|
||||
if(VORBISFILE_FOUND)
|
||||
set(VORBIS_SOURCE "(system)")
|
||||
endif()
|
||||
endif()
|
||||
if(VORBIS_PATH AND OGG_PATH OR NOT VORBISFILE_FOUND)
|
||||
FetchDependency(OGG
|
||||
DIR ogg
|
||||
GIT_REPOSITORY https://gitlab.xiph.org/xiph/ogg
|
||||
GIT_TAG v1.3.5
|
||||
)
|
||||
if(VORBIS_PATH AND (OGG_PATH OR OGG_FOUND) OR NOT VORBISFILE_FOUND)
|
||||
FetchDependency(VORBIS
|
||||
DIR vorbis
|
||||
GIT_REPOSITORY https://gitlab.xiph.org/xiph/vorbis
|
||||
GIT_TAG v1.3.7
|
||||
)
|
||||
|
||||
if(OGG_PATH AND VORBIS_PATH)
|
||||
add_subdirectory(${OGG_PATH} ${OGG_BIN})
|
||||
set(OGG_INCLUDE_DIR ${OGG_PATH}/include ${OGG_BIN}/include)
|
||||
set(OGG_LIBRARY ogg)
|
||||
|
||||
add_subdirectory(${VORBIS_PATH} ${VORBIS_BIN})
|
||||
if(VORBIS_PATH)
|
||||
add_subdirectory(${VORBIS_PATH} ${VORBIS_BIN} EXCLUDE_FROM_ALL)
|
||||
set(OGG_VORBIS_INCLUDE_DIR ${VORBIS_PATH}/include)
|
||||
set(OGG_VORBIS_LIBRARY vorbis)
|
||||
|
||||
|
||||
@ -121,12 +121,15 @@ macro(setup_target TARGET)
|
||||
|
||||
if(USE_CELT)
|
||||
target_compile_definitions(${TARGET} PRIVATE VGM_USE_CELT)
|
||||
if(LINK)
|
||||
if(WIN32 AND LINK)
|
||||
add_dependencies(${TARGET} libcelt)
|
||||
target_link_libraries(${TARGET}
|
||||
${VGM_BINARY_DIR}/ext_libs/libcelt-0061.lib
|
||||
${VGM_BINARY_DIR}/ext_libs/libcelt-0110.lib)
|
||||
endif()
|
||||
if(NOT WIN32 AND LINK)
|
||||
target_link_libraries(${TARGET} celt0061 celt0110 m)
|
||||
endif()
|
||||
endif()
|
||||
|
||||
if(USE_SPEEX)
|
||||
|
||||
140
ext_libs/celt-0110/ecintrin.h
Normal file
140
ext_libs/celt-0110/ecintrin.h
Normal file
@ -0,0 +1,140 @@
|
||||
/* Copyright (c) 2003-2008 Timothy B. Terriberry
|
||||
Copyright (c) 2008 Xiph.Org Foundation */
|
||||
/*
|
||||
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.
|
||||
*/
|
||||
|
||||
/*Some common macros for potential platform-specific optimization.*/
|
||||
#include <math.h>
|
||||
#include <limits.h>
|
||||
#if !defined(_ecintrin_H)
|
||||
# define _ecintrin_H (1)
|
||||
|
||||
/*Some specific platforms may have optimized intrinsic or inline assembly
|
||||
versions of these functions which can substantially improve performance.
|
||||
We define macros for them to allow easy incorporation of these non-ANSI
|
||||
features.*/
|
||||
|
||||
/*Note that we do not provide a macro for abs(), because it is provided as a
|
||||
library function, which we assume is translated into an intrinsic to avoid
|
||||
the function call overhead and then implemented in the smartest way for the
|
||||
target platform.
|
||||
With modern gcc (4.x), this is true: it uses cmov instructions if the
|
||||
architecture supports it and branchless bit-twiddling if it does not (the
|
||||
speed difference between the two approaches is not measurable).
|
||||
Interestingly, the bit-twiddling method was patented in 2000 (US 6,073,150)
|
||||
by Sun Microsystems, despite prior art dating back to at least 1996:
|
||||
http://web.archive.org/web/19961201174141/www.x86.org/ftp/articles/pentopt/PENTOPT.TXT
|
||||
On gcc 3.x, however, our assumption is not true, as abs() is translated to a
|
||||
conditional jump, which is horrible on deeply piplined architectures (e.g.,
|
||||
all consumer architectures for the past decade or more) when the sign cannot
|
||||
be reliably predicted.*/
|
||||
|
||||
/*Modern gcc (4.x) can compile the naive versions of min and max with cmov if
|
||||
given an appropriate architecture, but the branchless bit-twiddling versions
|
||||
are just as fast, and do not require any special target architecture.
|
||||
Earlier gcc versions (3.x) compiled both code to the same assembly
|
||||
instructions, because of the way they represented ((_b)>(_a)) internally.*/
|
||||
#define EC_MAXI(_a,_b) ((_a)-((_a)-(_b)&-((_b)>(_a))))
|
||||
#define EC_MINI(_a,_b) ((_a)+((_b)-(_a)&-((_b)<(_a))))
|
||||
/*This has a chance of compiling branchless, and is just as fast as the
|
||||
bit-twiddling method, which is slightly less portable, since it relies on a
|
||||
sign-extended rightshift, which is not guaranteed by ANSI (but present on
|
||||
every relevant platform).*/
|
||||
#define EC_SIGNI(_a) (((_a)>0)-((_a)<0))
|
||||
/*Slightly more portable than relying on a sign-extended right-shift (which is
|
||||
not guaranteed by ANSI), and just as fast, since gcc (3.x and 4.x both)
|
||||
compile it into the right-shift anyway.*/
|
||||
#define EC_SIGNMASK(_a) (-((_a)<0))
|
||||
/*Clamps an integer into the given range.
|
||||
If _a>_c, then the lower bound _a is respected over the upper bound _c (this
|
||||
behavior is required to meet our documented API behavior).
|
||||
_a: The lower bound.
|
||||
_b: The value to clamp.
|
||||
_c: The upper boud.*/
|
||||
#define EC_CLAMPI(_a,_b,_c) (EC_MAXI(_a,EC_MINI(_b,_c)))
|
||||
|
||||
|
||||
/*Count leading zeros.
|
||||
This macro should only be used for implementing ec_ilog(), if it is defined.
|
||||
All other code should use EC_ILOG() instead.*/
|
||||
#if defined(_MSC_VER)
|
||||
# include <intrin.h>
|
||||
static __inline int ec_bsr(unsigned long _x){
|
||||
unsigned long ret;
|
||||
_BitScanReverse(&ret,_x);
|
||||
return (int)ret;
|
||||
}
|
||||
# define EC_CLZ0 (1)
|
||||
# define EC_CLZ(_x) (-ec_bsr(_x))
|
||||
#elif defined(ENABLE_TI_DSPLIB)
|
||||
# include "dsplib.h"
|
||||
# define EC_CLZ0 (31)
|
||||
# define EC_CLZ(_x) (_lnorm(x))
|
||||
#elif defined(__GNUC_PREREQ)
|
||||
# if __GNUC_PREREQ(3,4)
|
||||
# if INT_MAX>=2147483647
|
||||
# define EC_CLZ0 ((int)sizeof(unsigned)*CHAR_BIT)
|
||||
# define EC_CLZ(_x) (__builtin_clz(_x))
|
||||
# elif LONG_MAX>=2147483647L
|
||||
# define EC_CLZ0 ((int)sizeof(unsigned long)*CHAR_BIT)
|
||||
# define EC_CLZ(_x) (__builtin_clzl(_x))
|
||||
# endif
|
||||
# endif
|
||||
#endif
|
||||
|
||||
#if defined(EC_CLZ)
|
||||
/*Note that __builtin_clz is not defined when _x==0, according to the gcc
|
||||
documentation (and that of the BSR instruction that implements it on x86).
|
||||
The majority of the time we can never pass it zero.
|
||||
When we need to, it can be special cased.*/
|
||||
# define EC_ILOG(_x) (EC_CLZ0-EC_CLZ(_x))
|
||||
#else
|
||||
static int ec_ilog2(celt_uint32 _v){
|
||||
int ret;
|
||||
int m;
|
||||
ret=!!_v;
|
||||
m=!!(_v&0xFFFF0000)<<4;
|
||||
_v>>=m;
|
||||
ret|=m;
|
||||
m=!!(_v&0xFF00)<<3;
|
||||
_v>>=m;
|
||||
ret|=m;
|
||||
m=!!(_v&0xF0)<<2;
|
||||
_v>>=m;
|
||||
ret|=m;
|
||||
m=!!(_v&0xC)<<1;
|
||||
_v>>=m;
|
||||
ret|=m;
|
||||
ret+=!!(_v&0x2);
|
||||
return ret;
|
||||
}
|
||||
# define EC_ILOG(_x) (ec_ilog2(_x))
|
||||
#endif
|
||||
|
||||
#endif
|
||||
Loading…
Reference in New Issue
Block a user