生成Lame库文件（mp3lame）

1、下载android-ndk-r9

2、在android-ndk-r9\samples\下创建lame\jni文件夹

3、下载lame源码  地址：http://lame.sourceforge.net/download.php

4、源码解压，将libmp3lame文件夹、include中lame.h和lame_intrin.h复制到jni文件夹下

5、删除libmp3lame文件夹下的Makefile.am、Makefile.in、logoe.ico、文件夹i386、vector

6、将jni/util.h中的extern ieee754_float32_t fast_log2(ieee754_float32_t x);替换成extern float fast_log2(float x);

7、将 set_get.h中的#include <lame.h>改为#include "lame.h"

8、在jni文件夹下创建Android.mk，内容为：
LOCAL_PATH := $(call my-dir)

include $(CLEAR_VARS)

LOCAL_MODULE        := libmp3lame

LOCAL_SRC_FILES     := \

    ./libmp3lame/bitstream.c \

    ./libmp3lame/encoder.c \

    ./libmp3lame/fft.c \

    ./libmp3lame/gain_analysis.c \

    ./libmp3lame/id3tag.c \

    ./libmp3lame/lame.c \

    ./libmp3lame/mpglib_interface.c \

    ./libmp3lame/newmdct.c \

    ./libmp3lame/presets.c \

    ./libmp3lame/psymodel.c \

    ./libmp3lame/quantize.c \

    ./libmp3lame/quantize_pvt.c \

    ./libmp3lame/reservoir.c \

    ./libmp3lame/set_get.c \

    ./libmp3lame/tables.c \

    ./libmp3lame/takehiro.c \

    ./libmp3lame/util.c \

    ./libmp3lame/vbrquantize.c \

    ./libmp3lame/VbrTag.c \

    ./libmp3lame/version.c 

LOCAL_LDLIBS := -llog

LOCAL_CFLAGS = -DSTDC_HEADERS

include $(BUILD_SHARED_LIBRARY)

9、LameJni目录下ndk-build，生成so