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 := armeabi5.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:= libfaad LOCAL_C_INCLUDES := \ $(LOCAL_PATH) \ $(FAAD2_TOP)/android \ $(FAAD2_TOP)/include \ $(LOCAL_PATH)/codebook LOCAL_CFLAGS:= \ -DHAVE_CONFIG_H include $(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-build Compile thumb : faad <= bits.c Compile thumb : faad <= cfft.c Compile thumb : faad <= decoder.c Compile thumb : faad <= drc.c Compile thumb : faad <= drm_dec.c Compile thumb : faad <= error.c Compile thumb : faad <= filtbank.c Compile thumb : faad <= ic_predict.c Compile thumb : faad <= is.c Compile thumb : faad <= lt_predict.c Compile thumb : faad <= mdct.c Compile thumb : faad <= mp4.c Compile thumb : faad <= ms.c Compile thumb : faad <= output.c Compile thumb : faad <= pns.c Compile thumb : faad <= ps_dec.c Compile thumb : faad <= ps_syntax.c Compile thumb : faad <= pulse.c Compile thumb : faad <= specrec.c Compile thumb : faad <= syntax.c Compile thumb : faad <= tns.c Compile thumb : faad <= hcr.c Compile thumb : faad <= huffman.c Compile thumb : faad <= rvlc.c Compile thumb : faad <= ssr.c Compile thumb : faad <= ssr_fb.c Compile thumb : faad <= ssr_ipqf.c Compile thumb : faad <= common.c Compile thumb : faad <= sbr_dct.c Compile thumb : faad <= sbr_e_nf.c Compile thumb : faad <= sbr_fbt.c Compile thumb : faad <= sbr_hfadj.c Compile thumb : faad <= sbr_hfgen.c Compile thumb : faad <= sbr_huff.c Compile thumb : faad <= sbr_qmf.c Compile thumb : faad <= sbr_syntax.c Compile thumb : faad <= sbr_tf_grid.c Compile thumb : faad <= sbr_dec.c SharedLibrary : libfaad.so Install : libfaad.so => libs/armeabi/libfaad.so