在Android平台上编译faad2

1、从官网下载源码

2、编辑一个config.h：

/* config.h.  Generated from config.h.in by configure.  *//* config.h.in.  Generated from configure.in by autoheader.  *//* Define if you want to use libfaad together with Digital Radio Mondiale   (DRM) *//* #undef DRM *//* Define if you want support for Digital Radio Mondiale (DRM) parametric   stereo *//* #undef DRM_PS *//* Define to 1 if you have the <dlfcn.h> header file. */#define HAVE_DLFCN_H 1/* Define to 1 if you have the <errno.h> header file. */#define HAVE_ERRNO_H 1/* Define if needed *//* #undef HAVE_FLOAT32_T *//* Define to 1 if you have the <float.h> header file. */#define HAVE_FLOAT_H 1/* Define to 1 if you have the `getpwuid' function. */#define HAVE_GETPWUID 1/* Define to 1 if you have the <inttypes.h> header file. */#define HAVE_INTTYPES_H 1/* Define if you have the IOKit API *//* #undef HAVE_IOKIT_IOKITLIB_H *//* Define to 1 if you have the <limits.h> header file. */#define HAVE_LIMITS_H 1/* Define if you have C99's lrintf function. */#define HAVE_LRINTF 1/* Define to 1 if you have the <mathf.h> header file. *//* #undef HAVE_MATHF_H *//* Define to 1 if you have the `memcpy' function. */#define HAVE_MEMCPY 1/* Define to 1 if you have the <memory.h> header file. */#define HAVE_MEMORY_H 1/* Define to 1 if you have the <stdint.h> header file. */#define HAVE_STDINT_H 1/* Define to 1 if you have the <stdlib.h> header file. */#define HAVE_STDLIB_H 1/* Define to 1 if you have the `strchr' function. */#define HAVE_STRCHR 1/* Define to 1 if you have the <strings.h> header file. */#define HAVE_STRINGS_H 1/* Define to 1 if you have the <string.h> header file. */#define HAVE_STRING_H 1/* Define to 1 if you have the `strsep' function. */#define HAVE_STRSEP 1/* Define to 1 if you have the <sysfs/libsysfs.h> header file. *//* #undef HAVE_SYSFS_LIBSYSFS_H *//* Define to 1 if you have the <sys/stat.h> header file. */#define HAVE_SYS_STAT_H 1/* Define to 1 if you have the <sys/time.h> header file. */#define HAVE_SYS_TIME_H 1/* Define to 1 if you have the <sys/types.h> header file. */#define HAVE_SYS_TYPES_H 1/* Define to 1 if you have the <unistd.h> header file. */#define HAVE_UNISTD_H 1/* Define to 1 if your C compiler doesn't accept -c and -o together. *//* #undef NO_MINUS_C_MINUS_O *//* Name of package */#define PACKAGE "faad2"/* Define to the address where bug reports for this package should be sent. */#define PACKAGE_BUGREPORT ""/* Define to the full name of this package. */#define PACKAGE_NAME ""/* Define to the full name and version of this package. */#define PACKAGE_STRING ""/* Define to the one symbol short name of this package. */#define PACKAGE_TARNAME ""/* Define to the version of this package. */#define PACKAGE_VERSION ""/* Define to 1 if you have the ANSI C header files. */#define STDC_HEADERS 1/* Define to 1 if you can safely include both <sys/time.h> and <time.h>. */#define TIME_WITH_SYS_TIME 1/* Version number of package */#define VERSION "2.7.0"/* Define to 1 if your processor stores words with the most significant byte   first (like Motorola and SPARC, unlike Intel and VAX). *//* #undef WORDS_BIGENDIAN *//* Define to `__inline__' or `__inline' if that's what the C compiler   calls it, or to nothing if 'inline' is not supported under any name.  */#ifndef __cplusplus/* #undef inline */#endif/* Define to `long int' if <sys/types.h> does not define. *//* #undef off_t */

3、编写Android.mk

LOCAL_PATH := $(call my-dir)include $(CLEAR_VARS)LOCAL_MODULE:= faadLOCAL_ARM_MODE := armLOCAL_C_INCLUDES := \$(LOCAL_PATH)\$(LOCAL_PATH)/include\$(LOCAL_PATH)/libfaad\$(LOCAL_PATH)/common/mp4ff\$(LOCAL_PATH)/libfaad/codebookLOCAL_SRC_FILES := \libfaad/bits.c  \libfaad/cfft.c  \libfaad/decoder.c \libfaad/drc.c     \    libfaad/drm_dec.c \libfaad/error.c \libfaad/filtbank.c \libfaad/ic_predict.c \libfaad/is.c \libfaad/lt_predict.c \libfaad/mdct.c \libfaad/mp4.c \libfaad/ms.c \libfaad/output.c \libfaad/pns.c \libfaad/ps_dec.c \libfaad/ps_syntax.c \libfaad/pulse.c \libfaad/specrec.c \libfaad/syntax.c \libfaad/tns.c \libfaad/hcr.c \libfaad/huffman.c \libfaad/rvlc.c \libfaad/ssr.c \libfaad/ssr_fb.c \libfaad/ssr_ipqf.c \libfaad/common.c \libfaad/sbr_dct.c \libfaad/sbr_e_nf.c \libfaad/sbr_fbt.c \libfaad/sbr_hfadj.c \libfaad/sbr_hfgen.c \libfaad/sbr_huff.c \libfaad/sbr_qmf.c \libfaad/sbr_syntax.c \libfaad/sbr_tf_grid.c \libfaad/sbr_dec.c\common/mp4ff/mp4atom.c\common/mp4ff/mp4ff.c\common/mp4ff/mp4meta.c\common/mp4ff/mp4sample.c \common/mp4ff/mp4tagupdate.c\common/mp4ff/mp4util.c\com_iflytek_codec_aac_FaadAACNativeDecoder.cLOCAL_CFLAGS:= -DHAVE_CONFIG_HLOCAL_LDLIBS := -lloginclude $(BUILD_SHARED_LIBRARY)

4、编译。

5、定点化：

上面编译的是浮点的，可以编译成定点的，方法是把faad/libfaad/common.h中的两个宏打开：

#define FIXED_POINT#define BIG_IQ_TABLE

然后冲洗编译，在我的手机上，使用定点，可以快5倍。