alsa测试代码的编译

  1 CC=gcc

  2 TARGET=test

  3 SRC=$(wildcard *.c)

  4 

  5 OBJECT= ${SRC:.c=.o}

  6 INCLUDES=-I/usr/include/alsa

  7 LDFLAGS=-lasound

  8 

  9 all:$(TARGET)

 10 

 11 $(OBJECT):$(SRC)

 12         $(CC) -c $(INCLUDES) $<

 13 

 14 $(TARGET):$(OBJECT)

 15         $(CC) -o $@ $< $(LDFLAGS)

 16 

 17 .PHONY:clean

 18 

 19 clean:

 20         @rm -rf $(OBJECT) $(TARGET) *~

Makefile每个命令的第一个字符必须是制表符[tab] 

参考的文章，发表在了csdn上。

源文件保存为test1.c

这是make输出的结果：

root@ubuntu:/home/zhangbin/code/alsatest# make

gcc -c -I/usr/include/alsa test1.c

gcc -o test test1.o -lasound

运行结果：

root@ubuntu:/home/zhangbin/code/alsatest# ./test

ALSA library version: 1.0.22

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)

PCM subformats:

 STD (Standard)

PCM states:

 OPEN

 SETUP

 PREPARED

 RUNNING

 XRUN

 DRAINING

 PAUSED

 SUSPENDED

 DISCONNECTED