android 编译faad2

由于最近要做AAC解码，查看了网上最初有两种思路：第一章种是ffmpeg，我查看./configure --list-decoders的时候，有看到aac解码器，同时在x86上编译也能够打开aac解码器，但是用用ndk交叉编译的时候即使--enable-decoder=aac也没有打开AAC解码器，所以这种方法暂停。第二中方法是使用faad2解码，在x86上调试，写一个demo能够解码aac，然后就是交叉编译，也得到库，所以就使用第二种方法。在这里记录下来，帮助解码AAC的同仁。

1、到官网http://www.audiocoding.com/downloads.html 下载faad,当前的版本是2.7，

2、创建一个文件夹AACDecoder,进入AACDecoder

3、将下载的faad加压，并且重新命名为jni

4、然后就是创建Android.mk, Application.mk，首先在jni目录下面创建Android.mk

LOCAL_PATH := $(call my-dir)FAAD2_TOP := $(LOCAL_PATH)include $(CLEAR_VARS)include $(FAAD2_TOP)/libfaad/Android.mk

然后就是Application.mk,当然不创建Application.mk也没有问题

APP_ABI := armeabi

5.创建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 */

6.进入libfaad文件夹下面创建Android.mk

LOCAL_PATH:= $(call my-dir)include $(CLEAR_VARS)LOCAL_SRC_FILES:= \bits.c  \cfft.c  \decoder.c \drc.c     \     drm_dec.c \error.c \filtbank.c \ic_predict.c \is.c \lt_predict.c \mdct.c \mp4.c \ms.c \output.c \pns.c \ps_dec.c \ps_syntax.c \pulse.c \specrec.c \syntax.c \tns.c \hcr.c \huffman.c \rvlc.c \ssr.c \ssr_fb.c \ssr_ipqf.c \common.c \sbr_dct.c \sbr_e_nf.c \sbr_fbt.c \sbr_hfadj.c \sbr_hfgen.c \sbr_huff.c \sbr_qmf.c \sbr_syntax.c \sbr_tf_grid.c \sbr_dec.c LOCAL_MODULE:= libfaadLOCAL_C_INCLUDES := \$(LOCAL_PATH)\$(FAAD2_TOP)/android\$(FAAD2_TOP)/include\$(LOCAL_PATH)/codebookLOCAL_CFLAGS:=\-DHAVE_CONFIG_Hinclude $(BUILD_SHARED_LIBRARY)

7、在jni目录下面运行ndk-build

8、运行结果如下：

root@zhangjie:/home/AACDecoder/jni# ndk-buildCompile thumb  : faad <= bits.cCompile thumb  : faad <= cfft.cCompile thumb  : faad <= decoder.cCompile thumb  : faad <= drc.cCompile thumb  : faad <= drm_dec.cCompile thumb  : faad <= error.cCompile thumb  : faad <= filtbank.cCompile thumb  : faad <= ic_predict.cCompile thumb  : faad <= is.cCompile thumb  : faad <= lt_predict.cCompile thumb  : faad <= mdct.cCompile thumb  : faad <= mp4.cCompile thumb  : faad <= ms.cCompile thumb  : faad <= output.cCompile thumb  : faad <= pns.cCompile thumb  : faad <= ps_dec.cCompile thumb  : faad <= ps_syntax.cCompile thumb  : faad <= pulse.cCompile thumb  : faad <= specrec.cCompile thumb  : faad <= syntax.cCompile thumb  : faad <= tns.cCompile thumb  : faad <= hcr.cCompile thumb  : faad <= huffman.cCompile thumb  : faad <= rvlc.cCompile thumb  : faad <= ssr.cCompile thumb  : faad <= ssr_fb.cCompile thumb  : faad <= ssr_ipqf.cCompile thumb  : faad <= common.cCompile thumb  : faad <= sbr_dct.cCompile thumb  : faad <= sbr_e_nf.cCompile thumb  : faad <= sbr_fbt.cCompile thumb  : faad <= sbr_hfadj.cCompile thumb  : faad <= sbr_hfgen.cCompile thumb  : faad <= sbr_huff.cCompile thumb  : faad <= sbr_qmf.cCompile thumb  : faad <= sbr_syntax.cCompile thumb  : faad <= sbr_tf_grid.cCompile thumb  : faad <= sbr_dec.cSharedLibrary  : libfaad.soInstall        : libfaad.so => libs/armeabi/libfaad.so