Speex on Android

Speex on androidposted on Limit L 6, 2011, am, by Mario, under
Android,
OMG ponies !.

Jspeex does not work very well on Android, encoding times are between 0.03 to 0.2 seconds for a 320 samples frame. way to much for any real-time app (Can you say in-game voice chat? : P). So I set out to get
Native speex to compile for Android. A couple of steps are involved if you don't want to go the configure Road with ndk r5b.

1. Download the latest speex source distri.
2. Create your project's folder, and a JNI/FOLDER inside that folder
3. Copy the libspeex/and include/folders from the speex distri to your JNI/folder. You shocould end up with $ Project/JNI/libspeex and $ Project/JNI/include
4. Add the following thingy as your android. mk file in your JNI/folder

   LOCAL_PATH := $(call my-dir) include $(CLEAR_VARS) LOCAL_MODULE    := libspeexLOCAL_CFLAGS = -DFIXED_POINT -DUSE_KISS_FFT -DEXPORT="" -UHAVE_CONFIG_HLOCAL_C_INCLUDES := $(LOCAL_PATH)/include LOCAL_SRC_FILES :=  \./libspeex/bits.c \./libspeex/buffer.c \./libspeex/cb_search.c \./libspeex/exc_10_16_table.c \./libspeex/exc_10_32_table.c \./libspeex/exc_20_32_table.c \./libspeex/exc_5_256_table.c \./libspeex/exc_5_64_table.c \./libspeex/exc_8_128_table.c \./libspeex/fftwrap.c \./libspeex/filterbank.c \./libspeex/filters.c \./libspeex/gain_table.c \./libspeex/gain_table_lbr.c \./libspeex/hexc_10_32_table.c \./libspeex/hexc_table.c \./libspeex/high_lsp_tables.c \./libspeex/jitter.c \./libspeex/kiss_fft.c \./libspeex/kiss_fftr.c \./libspeex/lpc.c \./libspeex/lsp.c \./libspeex/lsp_tables_nb.c \./libspeex/ltp.c \./libspeex/mdf.c \./libspeex/modes.c \./libspeex/modes_wb.c \./libspeex/nb_celp.c \./libspeex/preprocess.c \./libspeex/quant_lsp.c \./libspeex/resample.c \./libspeex/sb_celp.c \./libspeex/scal.c \./libspeex/smallft.c \./libspeex/speex.c \./libspeex/speex_callbacks.c \./libspeex/speex_header.c \./libspeex/stereo.c \./libspeex/vbr.c \./libspeex/vq.c \./libspeex/window.c include $(BUILD_SHARED_LIBRARY)

5. Add the following thingy as your application. mk file in the JNI/folder

   APP_ABI := armeabi armeabi-v7a

   This will compile binaries for the arm and arm-v7a CPUs.

6. Add the following thingy as a file called speex_config_types.h to the $ Project/JNI/include/speex/folder.

   #ifndef __SPEEX_TYPES_H__#define __SPEEX_TYPES_H__typedef short spx_int16_t;typedef unsigned short spx_uint16_t;typedef int spx_int32_t;typedef unsigned int spx_uint32_t;#endif

7. Switch to the JNI/folder in your shell and type ndk-build. You'll end up with shared libs in the libs/armeabi and libs/armeabi-v7a folder
8. Write a JNI wrapper for decoding and encoding
9. ...
10. Profit!

I zipped up my JNI folder, you can download it here. Just fire up your shell, make sure your ndk is in your $ path and ndk-build the shit out of it. Enjoy.

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