Ò׽ؽØÍ¼Èí¼þ¡¢µ¥Îļþ¡¢Ãâ°²×°¡¢´¿ÂÌÉ«¡¢½ö160KB

Linux»·¾³ÏÂÓÃcÓïÑÔдµÄ²¥·ÅwavÎļþµÄС³ÌÐò

http://blog.csdn.net/noah1987/archive/2008/10/21/3118934.aspx
±¾³ÌÐò¿ÉÒÔ¶ÁÈ¡.wavÎļþ£¬È»ºó½øÐв¥·Å¡£
ʹÓÃǰ£¬ÇëÈ·ÈÏÄúÊÇ·ñ°²×°ÒôƵÇý¶¯¡£
È·ÈÏ·½·¨£ºcat /etc/sndstat£¬Èç¹ûÏÔʾÎÞ´ËÉ豸£¬ÔòûÓа²×°Çý¶¯¡£
°²×°Çý¶¯ºÜ¼òµ¥£¬µ½oss.comÉÏÏÂÔØÒôƵÇý¶¯£¬È»ºó°´ÕÕÍøÉϵĽ̳̽øÐоͿÉÒÔÁË¡£
Ô´´úÂëÈçÏ£º
#include <unistd.h>
#include <fcntl.h>
#include <sys/types.h>
#include <sys/ioctl.h>
#include <stdlib.h>
#include <stdio.h>
#include <linux/soundcard.h>
/* ÏÂÃæµÄÈý¸ö²ÎÊýÊǸú¾ßÌåÎļþÏà¹ØµÄ£¬ÎļþʲôÑù£¬¾ÍÒªÉèÖóÉʲôÑù */
#define RATE 11025  
#define SIZE 16    
#define CHANNELS 1  // 1±íʾµ¥ÉùµÀ£¬2ΪÁ¢ÌåÉù
/* ................ */
unsigned 
char
 buf[RATE*SIZE/8]; //bufÀïÃæÕýºÃ·ÅÒ»ÃëÖÓµÄÒôƵ£¬ÏÂÃæµÄ¼ÆÊ±»¹ÒªÓÃ
int
 main()
{
    int
 fd;
    int
 wavfd; //wavÎļþµÄÃèÊö·û
    int
 arg;        
/* ..ioctl..... */
    int
 status;   
/* ........ */
                
/* ...... */
    fd = open(
"/dev/dsp"
, O_RDWR
);      
    if
 (fd < 0) {
        printf(
"open of /dev/dsp failed"
);
        exit(1);
}
    wavfd = open(
"12193767609.wav"
,O_RDONLY);
    if
 (wavfd < 0) {
        printf(
"open of wav failed"
);
       


Ïà¹ØÎĵµ£º

ʵսLinux Bluetooth±à³Ì(Áù) L2CAP±à³ÌʵÀý

ÀýÒ»£º·¢ËÍSignaling Packet£º
Signaling CommandÊÇ2¸öBluetoothʵÌåÖ®¼äµÄL2CAP²ãÃüÁî´«Êä¡£ËùÒÔµÃSignaling CommandʹÓÃCID 0x0001.
¶à¸öCommand¿ÉÒÔÔÚÒ»¸öC-frame£¨control frame£©Öз¢ËÍ¡£
 Èç¹ûÒªÖ±½Ó·¢ËÍSignaling Command.ÐèÒª½¨Á¢SOCK_RAWÀàÐ͵ÄL2CAPÁ¬½ÓSocket¡£ÕâÑù²ÅÓлú»á×Ô¼ºÌî³äCommand Code£¬Identi ......

CÓïÑÔÖ¸Õ루һ£©


Ö¸ÕëÊÇ£ÃÓïÑÔÖй㷺ʹÓõÄÒ»ÖÖÊý¾ÝÀàÐÍ¡£ÔËÓÃÖ¸Õë±à³ÌÊÇ£ÃÓïÑÔ×îÖ÷ÒªµÄ·ç¸ñÖ®Ò»¡£ÀûÓÃÖ¸Õë±äÁ¿¿ÉÒÔ±íʾ¸÷ÖÖÊý¾Ý½á¹¹£»Äܷܺ½±ãµØÊ¹ÓÃÊý×éºÍ×Ö·û´®£»²¢ÄÜÏó»ã±àÓïÑÔÒ»Ñù´¦ÀíÄÚ´æµØÖ·£¬´Ó¶ø±à³ö¾«Á·¶ø¸ßЧµÄ³ÌÐò¡£Ö¸Õ뼫´óµØ·á¸»ÁË£ÃÓïÑԵŦÄÜ¡£Ñ§Ï°Ö¸ÕëÊÇѧϰ£ÃÓïÑÔÖÐ×îÖØÒªµÄÒ»»·£¬ÄÜ·ñÕýÈ·Àí½âºÍʹÓÃÖ¸ÕëÊÇÎÒÃÇÊÇ·ñÕÆÎÕ ......

CÓïÑÔÎļþ

13.1 CÎļþ¸ÅÊö
    Ëùν“Îļþ”ÊÇÖ¸Ò»×éÏà¹ØÊý¾ÝµÄÓÐÐò¼¯ºÏ¡£Õâ¸öÊý¾Ý¼¯ÓÐÒ»¸öÃû³Æ£¬½Ð×öÎļþÃû¡£Êµ¼ÊÉÏÔÚÇ°ÃæµÄ¸÷ÕÂÖÐÎÒÃÇÒѾ­¶à´ÎʹÓÃÁËÎļþ£¬ÀýÈçÔ´³ÌÐòÎļþ¡¢Ä¿±êÎļþ¡¢¿ÉÖ´ÐÐÎļþ¡¢¿âÎļþ (Í·Îļþ)µÈ¡£
    Îļþͨ³£ÊÇפÁôÔÚÍⲿ½éÖÊ(Èç´ÅÅ̵È)Éϵģ¬ÔÚʹÓÃʱ²Åµ÷ÈëÄÚ´æÖ ......

CµÄÀúÊ·

CµÄÓÉÀ´
CÓïÑÔÊÇÓÉUNIXµÄÑÐÖÆÕßDennis RitchieºÍKen ThompsonÓÚ1970ÄêÑÐÖÆ³öµÄBÓïÑԵĻù´¡ÉÏ·¢Õ¹ºÍÍêÉÆÆðÀ´µÄ.
CµÄÌØµã
CÓïÑÔÊÇÒ»ÖÖÃæÏò¹ý³ÌµÄÓïÑÔ,ͬʱ¾ßÓлã±àÓïÑԺ͸߼¶ÓïÑÔµÄÓŵã.CÓïÑÔ¿ÉÒԹ㷺ӦÓÃÓÚ²»Í¬µÄ²Ù×÷ϵͳ,ÈçUNIX,DOS,Windows¼°LinuxµÈ.
CµÄ·¢Õ¹
1973Äê,CÓïÑÔµÚÒ»´Î±»ÓÃÀ´±àд²Ù×÷ϵͳ(Unix)µÄÄÚºË.Denn ......

CÓïÑÔº¯Êýµ÷ÓÃÔ¼¶¨


×ªÔØ×Ô£º
ܰÈÙ¼ÒÔ°blog
ÔÚCÓïÑÔÖУ¬¼ÙÉèÎÒÃÇÓÐÕâÑùµÄÒ»¸öº¯Êý£º
int function(int a,int b)
µ÷
ÓÃʱֻҪÓÃresult =
function(1,2)ÕâÑùµÄ·½Ê½¾Í¿ÉÒÔʹÓÃÕâ¸öº¯Êý¡£µ«ÊÇ£¬µ±¸ß¼¶ÓïÑÔ±»±àÒë³É¼ÆËã»ú¿ÉÒÔʶ±ðµÄ»úÆ÷Âëʱ£¬ÓÐÒ»¸öÎÊÌâ¾Í͹ÏÖ³öÀ´£ºÔÚCPUÖУ¬¼ÆËã
»úûÓа취֪µÀÒ»¸öº¯Êýµ÷ÓÃÐèÒª¶àÉÙ¸ö¡¢Ê²Ã´ÑùµÄ²ÎÊý£¬Ò² ......
© 2009 ej38.com All Rights Reserved. ¹ØÓÚE½¡ÍøÁªÏµÎÒÃÇ | Õ¾µãµØÍ¼ | ¸ÓICP±¸09004571ºÅ