MP3 encoder가 필요해서 작업중이엇는데 누가 아주 잘 설명을 해두었네요.
필요하신 분들을 step by step으로 따라하심 됩니다.
http://blog.libertadtech.com/2011/02/porting-lame-encoder-to-android-arm.html
porting compiling lame encoder to Android ARM arch using Android NDK
I was looking for a mp3 encoding application in Android Market, and found very few, the reason I think Android doesn't support mp3 encoding is because mp3 is patented technology. Another reason is I guess people prefer Java programming and Android SDK rather than Android native development kit.
Nevertheless compiling libmp3lame library for Android using Android NDK is very easy actually.
1. download Android NDK(also you need Android SDK and Eclipse with ADT plugin) and create simple project.
2. create directory called "jni" in your project's directory.
3. download lame sources, extract, copy all sources from directory libmp3lame to jni directory. Also copy lame.h which is located in include directory of lame sources.
4. create jni/Android.mk file. it should look like this:
6. edit file jni/utils.h, and replace definition extern ieee754_float32_t fast_log2(ieee754_float32_t x);
with this extern float fast_log2(float x);
Nevertheless compiling libmp3lame library for Android using Android NDK is very easy actually.
1. download Android NDK(also you need Android SDK and Eclipse with ADT plugin) and create simple project.
2. create directory called "jni" in your project's directory.
3. download lame sources, extract, copy all sources from directory libmp3lame to jni directory. Also copy lame.h which is located in include directory of lame sources.
4. create jni/Android.mk file. it should look like this:
5. clean lame sources, remove what's left from GNU autotools, Makefile.am Makefile.in libmp3lame_vc8.vcproj logoe.ico depcomp, folders i386 vector.LOCAL_PATH := $(call my-dir)include $(CLEAR_VARS)LOCAL_MODULE := mp3lameLOCAL_SRC_FILES := bitstream.c fft.c id3tag.c mpglib_interface.c presets.c quantize.c reservoir.c tables.c util.c VbrTag.c encoder.c gain_analysis.c lame.c newmdct.c psymodel.c quantize_pvt.c set_get.c takehiro.c vbrquantize.c version.cinclude $(BUILD_SHARED_LIBRARY)
6. edit file jni/utils.h, and replace definition extern ieee754_float32_t fast_log2(ieee754_float32_t x);
with this extern float fast_log2(float x);
