fdk-aac 交叉编译 so

第一步下载 fdk-aac 源码。

github.com/mstorsjo/fd…

sourceforge.net/projects/op…

第二步：复制所有的 libxxx 文件夹到 AndroidStudio 中。

第三步：添加log.h文件，不然编译会报错。

#ifndef EXAMPLE_LOG_H
#define EXAMPLE_LOG_H


#include <stdarg.h>
#include <android/log.h>

#ifdef __cplusplus
extern "C" {
#endif


void android_errorWriteLog(int32_t errCode, const char* format, ...)
{
    va_list args;
    va_start(args, format);
    __android_log_vprint(ANDROID_LOG_ERROR, "Error", format, args);
    va_end(args);
}


#ifdef __cplusplus
}
#endif

#endif //EXAMPLE_LOG_H

第四步：编写 cmake 和 gradle 编译脚本

cmake

# For more information about using CMake with Android Studio, read the
# documentation: https://d.android.com/studio/projects/add-native-code.html

# Sets the minimum version of CMake required to build the native library.

cmake_minimum_required(VERSION 3.22.1)

# Declares and names the project.

project(fdk-aac)

set(CMAKE_VERBOSE_MAKEFILE on)
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -DLOGTEST")

# 设置so库的输出路径
set(CMAKE_LIBRARY_OUTPUT_DIRECTORY ${CMAKE_SOURCE_DIR}/../../../libs/${ANDROID_ABI})

include_directories(src)

set(AACDEC_SRC
        libAACdec/src/FDK_delay.cpp
        libAACdec/src/aac_ram.cpp
        libAACdec/src/aac_rom.cpp
        libAACdec/src/aacdec_drc.cpp
        libAACdec/src/aacdec_hcr.cpp
        libAACdec/src/aacdec_hcr_bit.cpp
        libAACdec/src/aacdec_hcrs.cpp
        libAACdec/src/aacdec_pns.cpp
        libAACdec/src/aacdec_tns.cpp
        libAACdec/src/aacdecoder.cpp
        libAACdec/src/aacdecoder_lib.cpp
        libAACdec/src/block.cpp
        libAACdec/src/channel.cpp
        libAACdec/src/channelinfo.cpp
        libAACdec/src/conceal.cpp
        libAACdec/src/ldfiltbank.cpp
        libAACdec/src/pulsedata.cpp
        libAACdec/src/rvlc.cpp
        libAACdec/src/rvlcbit.cpp
        libAACdec/src/rvlcconceal.cpp
        libAACdec/src/stereo.cpp
        libAACdec/src/usacdec_ace_d4t64.cpp
        libAACdec/src/usacdec_ace_ltp.cpp
        libAACdec/src/usacdec_acelp.cpp
        libAACdec/src/usacdec_fac.cpp
        libAACdec/src/usacdec_lpc.cpp
        libAACdec/src/usacdec_lpd.cpp
        libAACdec/src/usacdec_rom.cpp
        libAACdec/src/aac_ram.h
        libAACdec/src/aac_rom.h
        libAACdec/src/aacdec_drc.h
        libAACdec/src/aacdec_drc_types.h
        libAACdec/src/aacdec_hcr.h
        libAACdec/src/aacdec_hcr_bit.h
        libAACdec/src/aacdec_hcr_types.h
        libAACdec/src/aacdec_hcrs.h
        libAACdec/src/aacdec_pns.h
        libAACdec/src/aacdec_tns.h
        libAACdec/src/aacdecoder.h
        libAACdec/src/block.h
        libAACdec/src/channel.h
        libAACdec/src/channelinfo.h
        libAACdec/src/conceal.h
        libAACdec/src/conceal_types.h
        libAACdec/src/FDK_delay.h
        libAACdec/src/ldfiltbank.h
        libAACdec/src/overlapadd.h
        libAACdec/src/pulsedata.h
        libAACdec/src/rvlc.h
        libAACdec/src/rvlc_info.h
        libAACdec/src/rvlcbit.h
        libAACdec/src/rvlcconceal.h
        libAACdec/src/stereo.h
        libAACdec/src/usacdec_ace_d4t64.h
        libAACdec/src/usacdec_ace_ltp.h
        libAACdec/src/usacdec_acelp.h
        libAACdec/src/usacdec_const.h
        libAACdec/src/usacdec_fac.h
        libAACdec/src/usacdec_lpc.h
        libAACdec/src/usacdec_lpd.h
        libAACdec/src/usacdec_rom.h)

set(AACENC_SRC
        libAACenc/src/aacEnc_ram.cpp
        libAACenc/src/aacEnc_rom.cpp
        libAACenc/src/aacenc.cpp
        libAACenc/src/aacenc_lib.cpp
        libAACenc/src/aacenc_pns.cpp
        libAACenc/src/aacenc_tns.cpp
        libAACenc/src/adj_thr.cpp
        libAACenc/src/band_nrg.cpp
        libAACenc/src/bandwidth.cpp
        libAACenc/src/bit_cnt.cpp
        libAACenc/src/bitenc.cpp
        libAACenc/src/block_switch.cpp
        libAACenc/src/channel_map.cpp
        libAACenc/src/chaosmeasure.cpp
        libAACenc/src/dyn_bits.cpp
        libAACenc/src/grp_data.cpp
        libAACenc/src/intensity.cpp
        libAACenc/src/line_pe.cpp
        libAACenc/src/metadata_compressor.cpp
        libAACenc/src/metadata_main.cpp
        libAACenc/src/mps_main.cpp
        libAACenc/src/ms_stereo.cpp
        libAACenc/src/noisedet.cpp
        libAACenc/src/pnsparam.cpp
        libAACenc/src/pre_echo_control.cpp
        libAACenc/src/psy_configuration.cpp
        libAACenc/src/psy_main.cpp
        libAACenc/src/qc_main.cpp
        libAACenc/src/quantize.cpp
        libAACenc/src/sf_estim.cpp
        libAACenc/src/spreading.cpp
        libAACenc/src/tonality.cpp
        libAACenc/src/transform.cpp
        libAACenc/src/aacenc.h
        libAACenc/src/aacenc_pns.h
        libAACenc/src/aacEnc_ram.h
        libAACenc/src/aacEnc_rom.h
        libAACenc/src/aacenc_tns.h
        libAACenc/src/adj_thr.h
        libAACenc/src/adj_thr_data.h
        libAACenc/src/band_nrg.h
        libAACenc/src/bandwidth.h
        libAACenc/src/bit_cnt.h
        libAACenc/src/bitenc.h
        libAACenc/src/block_switch.h
        libAACenc/src/channel_map.h
        libAACenc/src/chaosmeasure.h
        libAACenc/src/dyn_bits.h
        libAACenc/src/grp_data.h
        libAACenc/src/intensity.h
        libAACenc/src/interface.h
        libAACenc/src/line_pe.h
        libAACenc/src/metadata_compressor.h
        libAACenc/src/metadata_main.h
        libAACenc/src/mps_main.h
        libAACenc/src/ms_stereo.h
        libAACenc/src/noisedet.h
        libAACenc/src/pns_func.h
        libAACenc/src/pnsparam.h
        libAACenc/src/pre_echo_control.h
        libAACenc/src/psy_configuration.h
        libAACenc/src/psy_const.h
        libAACenc/src/psy_data.h
        libAACenc/src/psy_main.h
        libAACenc/src/qc_data.h
        libAACenc/src/qc_main.h
        libAACenc/src/quantize.h
        libAACenc/src/sf_estim.h
        libAACenc/src/spreading.h
        libAACenc/src/tns_func.h
        libAACenc/src/tonality.h
        libAACenc/src/transform.h)

set(ARITHCODING_SRC
        libArithCoding/src/ac_arith_coder.cpp)

set(DRCDEC_SRC
        libDRCdec/src/FDK_drcDecLib.cpp
        libDRCdec/src/drcDec_gainDecoder.cpp
        libDRCdec/src/drcDec_reader.cpp
        libDRCdec/src/drcDec_rom.cpp
        libDRCdec/src/drcDec_selectionProcess.cpp
        libDRCdec/src/drcDec_tools.cpp
        libDRCdec/src/drcGainDec_init.cpp
        libDRCdec/src/drcGainDec_preprocess.cpp
        libDRCdec/src/drcGainDec_process.cpp
        libDRCdec/src/drcDec_gainDecoder.h
        libDRCdec/src/drcDec_reader.h
        libDRCdec/src/drcDec_rom.h
        libDRCdec/src/drcDec_selectionProcess.h
        libDRCdec/src/drcDec_tools.h
        libDRCdec/src/drcDec_types.h
        libDRCdec/src/drcDecoder.h
        libDRCdec/src/drcGainDec_init.h
        libDRCdec/src/drcGainDec_preprocess.h
        libDRCdec/src/drcGainDec_process.h)

set(FDK_SRC
        libFDK/src/FDK_bitbuffer.cpp
        libFDK/src/FDK_core.cpp
        libFDK/src/FDK_crc.cpp
        libFDK/src/FDK_decorrelate.cpp
        libFDK/src/FDK_hybrid.cpp
        libFDK/src/FDK_lpc.cpp
        libFDK/src/FDK_matrixCalloc.cpp
        libFDK/src/FDK_qmf_domain.cpp
        libFDK/src/FDK_tools_rom.cpp
        libFDK/src/FDK_trigFcts.cpp
        libFDK/src/autocorr2nd.cpp
        libFDK/src/dct.cpp
        libFDK/src/fft.cpp
        libFDK/src/fft_rad2.cpp
        libFDK/src/fixpoint_math.cpp
        libFDK/src/huff_nodes.cpp
        libFDK/src/mdct.cpp
        libFDK/src/nlc_dec.cpp
        libFDK/src/qmf.cpp
        libFDK/src/scale.cpp)

set(MPEGTPDEC_SRC
        libMpegTPDec/src/tpdec_adif.cpp
        libMpegTPDec/src/tpdec_adts.cpp
        libMpegTPDec/src/tpdec_asc.cpp
        libMpegTPDec/src/tpdec_drm.cpp
        libMpegTPDec/src/tpdec_latm.cpp
        libMpegTPDec/src/tpdec_lib.cpp
        libMpegTPDec/src/tp_version.h
        libMpegTPDec/src/tpdec_adif.h
        libMpegTPDec/src/tpdec_adts.h
        libMpegTPDec/src/tpdec_drm.h
        libMpegTPDec/src/tpdec_latm.h)

set(MPEGTPENC_SRC
        libMpegTPEnc/src/tpenc_adif.cpp
        libMpegTPEnc/src/tpenc_adts.cpp
        libMpegTPEnc/src/tpenc_asc.cpp
        libMpegTPEnc/src/tpenc_latm.cpp
        libMpegTPEnc/src/tpenc_lib.cpp
        libMpegTPEnc/src/tp_version.h
        libMpegTPEnc/src/tpenc_adif.h
        libMpegTPEnc/src/tpenc_adts.h
        libMpegTPEnc/src/tpenc_asc.h
        libMpegTPEnc/src/tpenc_latm.h)

set(PCMUTILS_SRC
        libPCMutils/src/limiter.cpp
        libPCMutils/src/pcm_utils.cpp
        libPCMutils/src/pcmdmx_lib.cpp
        libPCMutils/src/version.h)

set(SACDEC_SRC
        libSACdec/src/sac_bitdec.cpp
        libSACdec/src/sac_calcM1andM2.cpp
        libSACdec/src/sac_dec.cpp
        libSACdec/src/sac_dec_conceal.cpp
        libSACdec/src/sac_dec_lib.cpp
        libSACdec/src/sac_process.cpp
        libSACdec/src/sac_qmf.cpp
        libSACdec/src/sac_reshapeBBEnv.cpp
        libSACdec/src/sac_rom.cpp
        libSACdec/src/sac_smoothing.cpp
        libSACdec/src/sac_stp.cpp
        libSACdec/src/sac_tsd.cpp
        libSACdec/src/sac_bitdec.h
        libSACdec/src/sac_calcM1andM2.h
        libSACdec/src/sac_dec.h
        libSACdec/src/sac_dec_conceal.h
        libSACdec/src/sac_dec_interface.h
        libSACdec/src/sac_dec_ssc_struct.h
        libSACdec/src/sac_process.h
        libSACdec/src/sac_qmf.h
        libSACdec/src/sac_reshapeBBEnv.h
        libSACdec/src/sac_rom.h
        libSACdec/src/sac_smoothing.h
        libSACdec/src/sac_stp.h
        libSACdec/src/sac_tsd.h)

set(SACENC_SRC
        libSACenc/src/sacenc_bitstream.cpp
        libSACenc/src/sacenc_delay.cpp
        libSACenc/src/sacenc_dmx_tdom_enh.cpp
        libSACenc/src/sacenc_filter.cpp
        libSACenc/src/sacenc_framewindowing.cpp
        libSACenc/src/sacenc_huff_tab.cpp
        libSACenc/src/sacenc_lib.cpp
        libSACenc/src/sacenc_nlc_enc.cpp
        libSACenc/src/sacenc_onsetdetect.cpp
        libSACenc/src/sacenc_paramextract.cpp
        libSACenc/src/sacenc_staticgain.cpp
        libSACenc/src/sacenc_tree.cpp
        libSACenc/src/sacenc_vectorfunctions.cpp
        libSACenc/src/sacenc_bitstream.h
        libSACenc/src/sacenc_const.h
        libSACenc/src/sacenc_delay.h
        libSACenc/src/sacenc_dmx_tdom_enh.h
        libSACenc/src/sacenc_filter.h
        libSACenc/src/sacenc_framewindowing.h
        libSACenc/src/sacenc_huff_tab.h
        libSACenc/src/sacenc_nlc_enc.h
        libSACenc/src/sacenc_onsetdetect.h
        libSACenc/src/sacenc_paramextract.h
        libSACenc/src/sacenc_staticgain.h
        libSACenc/src/sacenc_tree.h
        libSACenc/src/sacenc_vectorfunctions.h)

set(SBRDEC_SRC
        libSBRdec/src/HFgen_preFlat.cpp
        libSBRdec/src/env_calc.cpp
        libSBRdec/src/env_dec.cpp
        libSBRdec/src/env_extr.cpp
        libSBRdec/src/hbe.cpp
        libSBRdec/src/huff_dec.cpp
        libSBRdec/src/lpp_tran.cpp
        libSBRdec/src/psbitdec.cpp
        libSBRdec/src/psdec.cpp
        libSBRdec/src/psdec_drm.cpp
        libSBRdec/src/psdecrom_drm.cpp
        libSBRdec/src/pvc_dec.cpp
        libSBRdec/src/sbr_deb.cpp
        libSBRdec/src/sbr_dec.cpp
        libSBRdec/src/sbr_ram.cpp
        libSBRdec/src/sbr_rom.cpp
        libSBRdec/src/sbrdec_drc.cpp
        libSBRdec/src/sbrdec_freq_sca.cpp
        libSBRdec/src/sbrdecoder.cpp
        libSBRdec/src/env_calc.h
        libSBRdec/src/env_dec.h
        libSBRdec/src/env_extr.h
        libSBRdec/src/hbe.h
        libSBRdec/src/HFgen_preFlat.h
        libSBRdec/src/huff_dec.h
        libSBRdec/src/lpp_tran.h
        libSBRdec/src/psbitdec.h
        libSBRdec/src/psdec.h
        libSBRdec/src/psdec_drm.h
        libSBRdec/src/pvc_dec.h
        libSBRdec/src/sbr_deb.h
        libSBRdec/src/sbr_dec.h
        libSBRdec/src/sbr_ram.h
        libSBRdec/src/sbr_rom.h
        libSBRdec/src/sbrdec_drc.h
        libSBRdec/src/sbrdec_freq_sca.h
        libSBRdec/src/transcendent.h)

set(SBRENC_SRC
        libSBRenc/src/bit_sbr.cpp
        libSBRenc/src/code_env.cpp
        libSBRenc/src/env_bit.cpp
        libSBRenc/src/env_est.cpp
        libSBRenc/src/fram_gen.cpp
        libSBRenc/src/invf_est.cpp
        libSBRenc/src/mh_det.cpp
        libSBRenc/src/nf_est.cpp
        libSBRenc/src/ps_bitenc.cpp
        libSBRenc/src/ps_encode.cpp
        libSBRenc/src/ps_main.cpp
        libSBRenc/src/resampler.cpp
        libSBRenc/src/sbr_encoder.cpp
        libSBRenc/src/sbr_misc.cpp
        libSBRenc/src/sbrenc_freq_sca.cpp
        libSBRenc/src/sbrenc_ram.cpp
        libSBRenc/src/sbrenc_rom.cpp
        libSBRenc/src/ton_corr.cpp
        libSBRenc/src/tran_det.cpp
        libSBRenc/src/bit_sbr.h
        libSBRenc/src/cmondata.h
        libSBRenc/src/code_env.h
        libSBRenc/src/env_bit.h
        libSBRenc/src/env_est.h
        libSBRenc/src/fram_gen.h
        libSBRenc/src/invf_est.h
        libSBRenc/src/mh_det.h
        libSBRenc/src/nf_est.h
        libSBRenc/src/ps_bitenc.h
        libSBRenc/src/ps_const.h
        libSBRenc/src/ps_encode.h
        libSBRenc/src/ps_main.h
        libSBRenc/src/resampler.h
        libSBRenc/src/sbr.h
        libSBRenc/src/sbr_def.h
        libSBRenc/src/sbr_misc.h
        libSBRenc/src/sbrenc_freq_sca.h
        libSBRenc/src/sbrenc_ram.h
        libSBRenc/src/sbrenc_rom.h
        libSBRenc/src/ton_corr.h
        libSBRenc/src/tran_det.h)

set(SYS_SRC
        libSYS/src/genericStds.cpp
        libSYS/src/syslib_channelMapDescr.cpp)

set(fdk_aacinclude_HEADERS
        libSYS/include/machine_type.h
        libSYS/include/genericStds.h
        libSYS/include/FDK_audio.h
        libSYS/include/syslib_channelMapDescr.h
        libAACenc/include/aacenc_lib.h
        libAACdec/include/aacdecoder_lib.h)

set(libfdk_aac_SOURCES
        ${AACDEC_SRC} ${AACENC_SRC}
        ${ARITHCODING_SRC}
        ${DRCDEC_SRC}
        ${MPEGTPDEC_SRC} ${MPEGTPENC_SRC}
        ${SACDEC_SRC} ${SACENC_SRC}
        ${SBRDEC_SRC} ${SBRENC_SRC}
        ${PCMUTILS_SRC} ${FDK_SRC} ${SYS_SRC})

add_library( # Sets the name of the library.
        fdk-aac

        # Sets the library as a shared library.
        SHARED

        # Provides a relative path to your source file(s).
        ${libfdk_aac_SOURCES})

# PUBLIC 标识的头文件是对外公开的，调用so需要
target_include_directories(fdk-aac
        PUBLIC
        libAACdec/include
        libAACenc/include
        libSYS/include
        PRIVATE
        libArithCoding/include
        libDRCdec/include
        libSACdec/include
        libSACenc/include
        libSBRdec/include
        libSBRenc/include
        libMpegTPDec/include
        libMpegTPEnc/include
        libFDK/include
        libPCMutils/include)

find_library(
        log-lib
        log)
        
target_link_libraries(
        fdk-aac
        ${log-lib} )

build.gradle文件中添加：

 defaultConfig {
        externalNativeBuild {
            cmake {
                cFlags("-DSTDC_HEADERS")
                cppFlags("-std=c++11 -frtti -fexceptions")
                abiFilters("arm64-v8a", "armeabi-v7a", "x86", "x86_64")
            }
        }
    }
    externalNativeBuild {
        cmake {
            path("src/main/fdk-aac/CMakeLists.txt")
            version = "3.22.1"
        }
    }

第五步：编译，生成so文件。