我正在研究与 android JNI 和 NDK 相关的 android 项目。我已经加载了项目所需的所有 .so 文件。但它仍然显示错误UnsatisfiedLink 错误，未找到本机方法，findLibrary retuned null，java.lang.Runtime，
我的日志图像如下
从图像中可以清楚地看到。添加了库，但为什么会出错？
还有一个文件在 Utilities.java 文件中声明了本机函数
我的代码是
package me.frankly.utils;
import java.nio.ByteBuffer;
import android.util.Log;
public class Utilities {
static
{
try
{
System.loadLibrary("videocompression");
}
catch(Exception e)
{
Log.d("Exception",e.toString());
}
}
public native static int convertVideoFrame(ByteBuffer src, ByteBuffer dest,
int destFormat, int width, int height, int padding, int swap);
}
本机代码：
#include <jni.h>
#include <libyuv.h>
#include <utils.h>
enum COLOR_FORMATTYPE {
COLOR_FormatMonochrome = 1,
COLOR_Format8bitRGB332 = 2,
COLOR_Format12bitRGB444 = 3,
COLOR_Format16bitARGB4444 = 4,
COLOR_Format16bitARGB1555 = 5,
COLOR_Format16bitRGB565 = 6,
COLOR_Format16bitBGR565 = 7,
COLOR_Format18bitRGB666 = 8,
COLOR_Format18bitARGB1665 = 9,
COLOR_Format19bitARGB1666 = 10,
COLOR_Format24bitRGB888 = 11,
COLOR_Format24bitBGR888 = 12,
COLOR_Format24bitARGB1887 = 13,
COLOR_Format25bitARGB1888 = 14,
COLOR_Format32bitBGRA8888 = 15,
COLOR_Format32bitARGB8888 = 16,
COLOR_FormatYUV411Planar = 17,
COLOR_FormatYUV411PackedPlanar = 18,
COLOR_FormatYUV420Planar = 19,
COLOR_FormatYUV420PackedPlanar = 20,
COLOR_FormatYUV420SemiPlanar = 21,
COLOR_FormatYUV422Planar = 22,
COLOR_FormatYUV422PackedPlanar = 23,
COLOR_FormatYUV422SemiPlanar = 24,
COLOR_FormatYCbYCr = 25,
COLOR_FormatYCrYCb = 26,
COLOR_FormatCbYCrY = 27,
COLOR_FormatCrYCbY = 28,
COLOR_FormatYUV444Interleaved = 29,
COLOR_FormatRawBayer8bit = 30,
COLOR_FormatRawBayer10bit = 31,
COLOR_FormatRawBayer8bitcompressed = 32,
COLOR_FormatL2 = 33,
COLOR_FormatL4 = 34,
COLOR_FormatL8 = 35,
COLOR_FormatL16 = 36,
COLOR_FormatL24 = 37,
COLOR_FormatL32 = 38,
COLOR_FormatYUV420PackedSemiPlanar = 39,
COLOR_FormatYUV422PackedSemiPlanar = 40,
COLOR_Format18BitBGR666 = 41,
COLOR_Format24BitARGB6666 = 42,
COLOR_Format24BitABGR6666 = 43,
COLOR_TI_FormatYUV420PackedSemiPlanar = 0x7f000100,
COLOR_FormatSurface = 0x7F000789,
COLOR_QCOM_FormatYUV420SemiPlanar = 0x7fa30c00
};
int isSemiPlanarYUV(int colorFormat) {
switch (colorFormat) {
case COLOR_FormatYUV420Planar:
case COLOR_FormatYUV420PackedPlanar:
return 0;
case COLOR_FormatYUV420SemiPlanar:
case COLOR_FormatYUV420PackedSemiPlanar:
case COLOR_TI_FormatYUV420PackedSemiPlanar:
return 1;
default:
return 0;
}
}
JNIEXPORT int Java_me_frankly_utils_Utilities_convertVideoFrame(
JNIEnv *env, jclass class, jobject src, jobject dest, int destFormat,
int width, int height, int padding, int swap)
{
if (!src || !dest || !destFormat) {
return 0;
}
jbyte *srcBuff = (*env)->GetDirectBufferAddress(env, src);
jbyte *destBuff = (*env)->GetDirectBufferAddress(env, dest);
int half_width = (width + 1) / 2;
int half_height = (height + 1) / 2;
if (!isSemiPlanarYUV(destFormat))
{
if (!swap)
{
ARGBToI420(srcBuff, width * 4, destBuff, width,
destBuff + width * height + half_width * half_height
+ padding * 5 / 4, half_width,
destBuff + width * height + padding, half_width, width,
height);
}
else
{
ARGBToI420(srcBuff, width * 4, destBuff, width,
destBuff + width * height + padding, half_width,
destBuff + width * height + half_width * half_height
+ padding * 5 / 4, half_width, width, height);
}
}
else
{
if (!swap)
{
ARGBToNV21(srcBuff, width * 4, destBuff, width,
destBuff + width * height + padding, half_width * 2, width,
height);
}
else
{
ARGBToNV12(srcBuff, width * 4, destBuff, width,
destBuff + width * height + padding, half_width * 2, width,
height);
}
}
return 1;
}
这是我由 javah -jni 生成的 .h 文件
/* DO NOT EDIT THIS FILE - it is machine generated */
#include <jni.h>
/* Header for class me_frankly_utils_Utilities */
#ifndef _Included_me_frankly_utils_Utilities
#define _Included_me_frankly_utils_Utilities
#ifdef __cplusplus
extern "C" {
#endif
/*
* Class: me_frankly_utils_Utilities
* Method: convertVideoFrame
* Signature: (Ljava/nio/ByteBuffer;Ljava/nio/ByteBuffer;IIIII)I
*/
JNIEXPORT jint JNICALL Java_me_frankly_utils_Utilities_convertVideoFrame
(JNIEnv *, jclass, jobject, jobject, jint, jint, jint, jint, jint);
#ifdef __cplusplus
}
#endif
#endif
这是我的 Android.mk 文件代码
LOCAL_PATH := $(call my-dir)
include $(CLEAR_VARS)
LOCAL_PRELINK_MODULE := false
LOCAL_MODULE := videocompression
LOCAL_CFLAGS := -w -std=gnu99 -O2 -DNULL=0 -DSOCKLEN_T=socklen_t -DLOCALE_NOT_USED -D_LARGEFILE_SOURCE=1 -D_FILE_OFFSET_BITS=64
LOCAL_CFLAGS += -Drestrict='' -D__EMX__ -DOPUS_BUILD -DFIXED_POINT -DUSE_ALLOCA -DHAVE_LRINT -DHAVE_LRINTF -fno-math-errno
LOCAL_CFLAGS += -DANDROID_NDK -DDISABLE_IMPORTGL -fno-strict-aliasing -fprefetch-loop-arrays -DAVOID_TABLES -DANDROID_TILE_BASED_DECODE -DANDROID_ARMV6_IDCT
LOCAL_CPPFLAGS := -DBSD=1 -ffast-math -O2 -funroll-loops
#LOCAL_LDLIBS := -llog
LOCAL_LDLIBS := -ljnigraphics -llog
LOCAL_SRC_FILES := \
./opus/src/opus.c \
./opus/src/opus_decoder.c \
./opus/src/opus_encoder.c \
./opus/src/opus_multistream.c \
./opus/src/opus_multistream_encoder.c \
./opus/src/opus_multistream_decoder.c \
./opus/src/repacketizer.c \
./opus/src/analysis.c \
./opus/src/mlp.c \
./opus/src/mlp_data.c
LOCAL_SRC_FILES += \
./opus/silk/CNG.c \
./opus/silk/code_signs.c \
./opus/silk/init_decoder.c \
./opus/silk/decode_core.c \
./opus/silk/decode_frame.c \
./opus/silk/decode_parameters.c \
./opus/silk/decode_indices.c \
./opus/silk/decode_pulses.c \
./opus/silk/decoder_set_fs.c \
./opus/silk/dec_API.c \
./opus/silk/enc_API.c \
./opus/silk/encode_indices.c \
./opus/silk/encode_pulses.c \
./opus/silk/gain_quant.c \
./opus/silk/interpolate.c \
./opus/silk/LP_variable_cutoff.c \
./opus/silk/NLSF_decode.c \
./opus/silk/NSQ.c \
./opus/silk/NSQ_del_dec.c \
./opus/silk/PLC.c \
./opus/silk/shell_coder.c \
./opus/silk/tables_gain.c \
./opus/silk/tables_LTP.c \
./opus/silk/tables_NLSF_CB_NB_MB.c \
./opus/silk/tables_NLSF_CB_WB.c \
./opus/silk/tables_other.c \
./opus/silk/tables_pitch_lag.c \
./opus/silk/tables_pulses_per_block.c \
./opus/silk/VAD.c \
./opus/silk/control_audio_bandwidth.c \
./opus/silk/quant_LTP_gains.c \
./opus/silk/VQ_WMat_EC.c \
./opus/silk/HP_variable_cutoff.c \
./opus/silk/NLSF_encode.c \
./opus/silk/NLSF_VQ.c \
./opus/silk/NLSF_unpack.c \
./opus/silk/NLSF_del_dec_quant.c \
./opus/silk/process_NLSFs.c \
./opus/silk/stereo_LR_to_MS.c \
./opus/silk/stereo_MS_to_LR.c \
./opus/silk/check_control_input.c \
./opus/silk/control_SNR.c \
./opus/silk/init_encoder.c \
./opus/silk/control_codec.c \
./opus/silk/A2NLSF.c \
./opus/silk/ana_filt_bank_1.c \
./opus/silk/biquad_alt.c \
./opus/silk/bwexpander_32.c \
./opus/silk/bwexpander.c \
./opus/silk/debug.c \
./opus/silk/decode_pitch.c \
./opus/silk/inner_prod_aligned.c \
./opus/silk/lin2log.c \
./opus/silk/log2lin.c \
./opus/silk/LPC_analysis_filter.c \
./opus/silk/LPC_inv_pred_gain.c \
./opus/silk/table_LSF_cos.c \
./opus/silk/NLSF2A.c \
./opus/silk/NLSF_stabilize.c \
./opus/silk/NLSF_VQ_weights_laroia.c \
./opus/silk/pitch_est_tables.c \
./opus/silk/resampler.c \
./opus/silk/resampler_down2_3.c \
./opus/silk/resampler_down2.c \
./opus/silk/resampler_private_AR2.c \
./opus/silk/resampler_private_down_FIR.c \
./opus/silk/resampler_private_IIR_FIR.c \
./opus/silk/resampler_private_up2_HQ.c \
./opus/silk/resampler_rom.c \
./opus/silk/sigm_Q15.c \
./opus/silk/sort.c \
./opus/silk/sum_sqr_shift.c \
./opus/silk/stereo_decode_pred.c \
./opus/silk/stereo_encode_pred.c \
./opus/silk/stereo_find_predictor.c \
./opus/silk/stereo_quant_pred.c
LOCAL_SRC_FILES += \
./opus/silk/fixed/LTP_analysis_filter_FIX.c \
./opus/silk/fixed/LTP_scale_ctrl_FIX.c \
./opus/silk/fixed/corrMatrix_FIX.c \
./opus/silk/fixed/encode_frame_FIX.c \
./opus/silk/fixed/find_LPC_FIX.c \
./opus/silk/fixed/find_LTP_FIX.c \
./opus/silk/fixed/find_pitch_lags_FIX.c \
./opus/silk/fixed/find_pred_coefs_FIX.c \
./opus/silk/fixed/noise_shape_analysis_FIX.c \
./opus/silk/fixed/prefilter_FIX.c \
./opus/silk/fixed/process_gains_FIX.c \
./opus/silk/fixed/regularize_correlations_FIX.c \
./opus/silk/fixed/residual_energy16_FIX.c \
./opus/silk/fixed/residual_energy_FIX.c \
./opus/silk/fixed/solve_LS_FIX.c \
./opus/silk/fixed/warped_autocorrelation_FIX.c \
./opus/silk/fixed/apply_sine_window_FIX.c \
./opus/silk/fixed/autocorr_FIX.c \
./opus/silk/fixed/burg_modified_FIX.c \
./opus/silk/fixed/k2a_FIX.c \
./opus/silk/fixed/k2a_Q16_FIX.c \
./opus/silk/fixed/pitch_analysis_core_FIX.c \
./opus/silk/fixed/vector_ops_FIX.c \
./opus/silk/fixed/schur64_FIX.c \
./opus/silk/fixed/schur_FIX.c
LOCAL_SRC_FILES += \
./opus/celt/bands.c \
./opus/celt/celt.c \
./opus/celt/celt_encoder.c \
./opus/celt/celt_decoder.c \
./opus/celt/cwrs.c \
./opus/celt/entcode.c \
./opus/celt/entdec.c \
./opus/celt/entenc.c \
./opus/celt/kiss_fft.c \
./opus/celt/laplace.c \
./opus/celt/mathops.c \
./opus/celt/mdct.c \
./opus/celt/modes.c \
./opus/celt/pitch.c \
./opus/celt/celt_lpc.c \
./opus/celt/quant_bands.c \
./opus/celt/rate.c \
./opus/celt/vq.c \
./opus/celt/arm/armcpu.c \
./opus/celt/arm/arm_celt_map.c
LOCAL_SRC_FILES += \
./opus/ogg/bitwise.c \
./opus/ogg/framing.c \
./opus/opusfile/info.c \
./opus/opusfile/internal.c \
./opus/opusfile/opusfile.c \
./opus/opusfile/stream.c
LOCAL_C_INCLUDES := \
./opus/include \
./opus/silk \
./opus/silk/fixed \
./opus/celt \
./opus/ \
./opus/opusfile \
./libyuv/include
LOCAL_SRC_FILES += \
./libjpeg/jcapimin.c \
./libjpeg/jcapistd.c \
./libjpeg/armv6_idct.S \
./libjpeg/jccoefct.c \
./libjpeg/jccolor.c \
./libjpeg/jcdctmgr.c \
./libjpeg/jchuff.c \
./libjpeg/jcinit.c \
./libjpeg/jcmainct.c \
./libjpeg/jcmarker.c \
./libjpeg/jcmaster.c \
./libjpeg/jcomapi.c \
./libjpeg/jcparam.c \
./libjpeg/jcphuff.c \
./libjpeg/jcprepct.c \
./libjpeg/jcsample.c \
./libjpeg/jctrans.c \
./libjpeg/jdapimin.c \
./libjpeg/jdapistd.c \
./libjpeg/jdatadst.c \
./libjpeg/jdatasrc.c \
./libjpeg/jdcoefct.c \
./libjpeg/jdcolor.c \
./libjpeg/jddctmgr.c \
./libjpeg/jdhuff.c \
./libjpeg/jdinput.c \
./libjpeg/jdmainct.c \
./libjpeg/jdmarker.c \
./libjpeg/jdmaster.c \
./libjpeg/jdmerge.c \
./libjpeg/jdphuff.c \
./libjpeg/jdpostct.c \
./libjpeg/jdsample.c \
./libjpeg/jdtrans.c \
./libjpeg/jerror.c \
./libjpeg/jfdctflt.c \
./libjpeg/jfdctfst.c \
./libjpeg/jfdctint.c \
./libjpeg/jidctflt.c \
./libjpeg/jidctfst.c \
./libjpeg/jidctint.c \
./libjpeg/jidctred.c \
./libjpeg/jmemmgr.c \
./libjpeg/jmemnobs.c \
./libjpeg/jquant1.c \
./libjpeg/jquant2.c \
./libjpeg/jutils.c
LOCAL_SRC_FILES += \
./libyuv/source/compare_common.cc \
./libyuv/source/compare_neon.cc \
./libyuv/source/compare_posix.cc \
./libyuv/source/compare_win.cc \
./libyuv/source/compare.cc \
./libyuv/source/convert_argb.cc \
./libyuv/source/convert_from_argb.cc \
./libyuv/source/convert_from.cc \
./libyuv/source/convert_jpeg.cc \
./libyuv/source/convert_to_argb.cc \
./libyuv/source/convert_to_i420.cc \
./libyuv/source/convert.cc \
./libyuv/source/cpu_id.cc \
./libyuv/source/format_conversion.cc \
./libyuv/source/mjpeg_decoder.cc \
./libyuv/source/mjpeg_validate.cc \
./libyuv/source/planar_functions.cc \
./libyuv/source/rotate_argb.cc \
./libyuv/source/rotate_mips.cc \
./libyuv/source/rotate_neon.cc \
./libyuv/source/rotate_neon64.cc \
./libyuv/source/rotate.cc \
./libyuv/source/row_any.cc \
./libyuv/source/row_common.cc \
./libyuv/source/row_mips.cc \
./libyuv/source/row_neon.cc \
./libyuv/source/row_neon64.cc \
./libyuv/source/row_posix.cc \
./libyuv/source/row_win.cc \
./libyuv/source/scale_argb.cc \
./libyuv/source/scale_common.cc \
./libyuv/source/scale_mips.cc \
./libyuv/source/scale_neon.cc \
./libyuv/source/scale_neon64.cc \
./libyuv/source/scale_posix.cc \
./libyuv/source/scale_win.cc \
./libyuv/source/scale.cc \
./libyuv/source/video_common.cc
LOCAL_SRC_FILES += \
./jni.c \
./audio.c \
./utils.c \
./image.c \
./video.c \
./fake.c
include $(BUILD_SHARED_LIBRARY)