RK3308語音識別----c和c++代碼混編工程Makefile文件編寫

最近在做語音識別相關，發現這個領域大部分代碼都是C++和C都混編都工程，研究了下混編方式，寫下記錄過程

cust@virtualbox:~/alsa_test$ ls
alsa  libasound.so  libasound.so.2  libasound.so.2.0.0  main.cpp  Makefile  test_one.c  test_one.h

main文件使用cpp結尾，test_one採用c結尾，如何混編呢？很簡單，增加頭文件，並在頭文件裏用一個宏！！

test_one.h內容

#ifndef __TEST_ONE_H__
#define __TEST_ONE_H__

#ifdef __cplusplus
extern "C"
{
#endif
extern int test_one();

#ifdef __cplusplus
}
#endif
#endif

main.cpp內容

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "alsa/asoundlib.h"
#include "test_one.h"

int main(int argc, char *argv[])
{
    test_one();
}

Makefile內容

PROJECT_DIR := $(shell pwd)

TARGET  = test
CC      := /mcuzone/work/buildroot/output/rockchip_rk3308_release/host/usr/bin/aarch64-rockchip-linux-gnu-gcc
CXX     := /mcuzone/work/buildroot/output/rockchip_rk3308_release/host/usr/bin/aarch64-rockchip-linux-gnu-g++
LD      := /mcuzone/work/buildroot/output/rockchip_rk3308_release/host/usr/bin/aarch64-rockchip-linux-gnu-ld
LIBS    := -ldl -lpthread -lasound 

DEFINES := -fpic 
INCLUDE := -I$(PROJECT_DIR)
CFLAGS  := -g -Wall -O3 $(DEFINES) $(INCLUDE)
CXXFLAGS:= $(CFLAGS)
LDFLAGS := -L$(PROJECT_DIR)
# source file
SOURCE  := $(wildcard ./*.c) $(wildcard ./*.cpp)
OBJS    := $(patsubst %.c,%.o,$(patsubst %.cpp,%.o,$(SOURCE)))


$(TARGET) : $(OBJS)
	    $(CXX) $(CXXFLAGS) -o $@ $(OBJS) $(LDFLAGS) $(LIBS)

.PHONY :    clean  

all : $(TARGET)
clean :
	rm -rf ./*.o
	rm $(TARGET)

test_one.c內容

#include <alsa/asoundlib.h>  
  
int test_one() {  
  int val;  
  
  printf("ALSA library version: %s\n",  
          SND_LIB_VERSION_STR);  
  
  printf("\nPCM stream types:\n");  
  for (val = 0; val <= SND_PCM_STREAM_LAST; val++)  
    printf("  %s\n",  
      snd_pcm_stream_name((snd_pcm_stream_t)val));  
  
  printf("\nPCM access types:\n");  
  for (val = 0; val <= SND_PCM_ACCESS_LAST; val++)  
    printf("  %s\n",  
      snd_pcm_access_name((snd_pcm_access_t)val));  
  
  printf("\nPCM formats:\n");  
  for (val = 0; val <= SND_PCM_FORMAT_LAST; val++)  
    if (snd_pcm_format_name((snd_pcm_format_t)val)  
      != NULL)  
      printf("  %s (%s)\n",  
        snd_pcm_format_name((snd_pcm_format_t)val),  
        snd_pcm_format_description(  
                           (snd_pcm_format_t)val));  
  
  printf("\nPCM subformats:\n");  
  for (val = 0; val <= SND_PCM_SUBFORMAT_LAST;  
       val++)  
    printf("  %s (%s)\n",  
      snd_pcm_subformat_name((  
        snd_pcm_subformat_t)val),  
      snd_pcm_subformat_description((  
        snd_pcm_subformat_t)val));  
  
  printf("\nPCM states:\n");  
  for (val = 0; val <= SND_PCM_STATE_LAST; val++)  
    printf("  %s\n",  
           snd_pcm_state_name((snd_pcm_state_t)val));  
  
  return 0;  
}  

編譯結果

cust@virtualbox:~/alsa_test$ make
/mcuzone/work/buildroot/output/rockchip_rk3308_release/host/usr/bin/aarch64-rockchip-linux-gnu-gcc -g -Wall -O3 -fpic  -I/home/cust/alsa_test   -c -o test_one.o test_one.c
/mcuzone/work/buildroot/output/rockchip_rk3308_release/host/usr/bin/aarch64-rockchip-linux-gnu-g++ -g -Wall -O3 -fpic  -I/home/cust/alsa_test   -c -o main.o main.cpp
/mcuzone/work/buildroot/output/rockchip_rk3308_release/host/usr/bin/aarch64-rockchip-linux-gnu-g++ -g -Wall -O3 -fpic  -I/home/cust/alsa_test -o test ./test_one.o ./main.o -L/home/cust/alsa_test -ldl -lpthread -lasound 

板子上運行結果

/oem # ./test 
ALSA library version: 1.1.5

PCM stream types:
  PLAYBACK
  CAPTURE

PCM access types:
  MMAP_INTERLEAVED
  MMAP_NONINTERLEAVED
  MMAP_COMPLEX
  RW_INTERLEAVED
  RW_NONINTERLEAVED

PCM formats:
  S8 (Signed 8 bit)
  U8 (Unsigned 8 bit)
  S16_LE (Signed 16 bit Little Endian)
  S16_BE (Signed 16 bit Big Endian)
  U16_LE (Unsigned 16 bit Little Endian)
  U16_BE (Unsigned 16 bit Big Endian)
  S24_LE (Signed 24 bit Little Endian)
  S24_BE (Signed 24 bit Big Endian)
  U24_LE (Unsigned 24 bit Little Endian)
  U24_BE (Unsigned 24 bit Big Endian)
  S32_LE (Signed 32 bit Little Endian)
  S32_BE (Signed 32 bit Big Endian)
  U32_LE (Unsigned 32 bit Little Endian)
  U32_BE (Unsigned 32 bit Big Endian)
  FLOAT_LE (Float 32 bit Little Endian)
  FLOAT_BE (Float 32 bit Big Endian)
  FLOAT64_LE (Float 64 bit Little Endian)
  FLOAT64_BE (Float 64 bit Big Endian)
  IEC958_SUBFRAME_LE (IEC-958 Little Endian)
  IEC958_SUBFRAME_BE (IEC-958 Big Endian)
  MU_LAW (Mu-Law)
  A_LAW (A-Law)
  IMA_ADPCM (Ima-ADPCM)
  MPEG (MPEG)
  GSM (GSM)
  SPECIAL (Special)
  S24_3LE (Signed 24 bit Little Endian in 3bytes)
  S24_3BE (Signed 24 bit Big Endian in 3bytes)
  U24_3LE (Unsigned 24 bit Little Endian in 3bytes)
  U24_3BE (Unsigned 24 bit Big Endian in 3bytes)
  S20_3LE (Signed 20 bit Little Endian in 3bytes)
  S20_3BE (Signed 20 bit Big Endian in 3bytes)
  U20_3LE (Unsigned 20 bit Little Endian in 3bytes)
  U20_3BE (Unsigned 20 bit Big Endian in 3bytes)
  S18_3LE (Signed 18 bit Little Endian in 3bytes)
  S18_3BE (Signed 18 bit Big Endian in 3bytes)
  U18_3LE (Unsigned 18 bit Little Endian in 3bytes)
  U18_3BE (Unsigned 18 bit Big Endian in 3bytes)
  G723_24 (G.723 (ADPCM) 24 kbit/s, 8 samples in 3 bytes)
  G723_24_1B (G.723 (ADPCM) 24 kbit/s, 1 sample in 1 byte)
  G723_40 (G.723 (ADPCM) 40 kbit/s, 8 samples in 3 bytes)
  G723_40_1B (G.723 (ADPCM) 40 kbit/s, 1 sample in 1 byte)
  DSD_U8 (Direct Stream Digital, 1-byte (x8), oldest bit in MSB)
  DSD_U16_LE (Direct Stream Digital, 2-byte (x16), little endian, oldest bits in MSB)
  DSD_U32_LE (Direct Stream Digital, 4-byte (x32), little endian, oldest bits in MSB)
  DSD_U16_BE (Direct Stream Digital, 2-byte (x16), big endian, oldest bits in MSB)
  DSD_U32_BE (Direct Stream Digital, 4-byte (x32), big endian, oldest bits in MSB)

PCM subformats:
  STD (Standard)

PCM states:
  OPEN
  SETUP
  PREPARED
  RUNNING
  XRUN
  DRAINING
  PAUSED
  SUSPENDED
  DISCONNECTED

以上，混編還是很方便的。