mymad.h

The purpose of this program is to run as a server, which can receive requirement from clients and se

#ifndef _HW4_MYMAD_H
#define _HW4_MYMAD_H

#include "myalsa.h"
#include "error.h"

#define MAD_BUF_SIZE (1152*4)         

struct buffer
{
    void * buf;                 /* buf for data to play */
    int sockfd;                 /* socket descriptor */
    ssize_t length;             /* length of the current stream */
    int finished;       /* flag to identify whether finish playing a mp3 file */
};

//int decode(unsigned char const *, unsigned long);

enum mad_flow                   /* input callback function, fetch data from the socket descriptor */
input(void *data, struct mad_stream *stream);

inline signed int               /* scale the samples to 16 bits, this function is obtained from minimad.c */
scale(mad_fixed_t sample);

enum mad_flow                   /* output callback function, form PCM data and call alsa_play */
output(void *data, 
       struct mad_header const *header,
       struct mad_pcm *pcm);

enum mad_flow                   /* error callback function */
error(void *data,
      struct mad_stream *stream,
      struct mad_frame *frame);

int                             /* this function will be called from main */
mad(int sockfd);                /* a function tackle mp3 files with libmad */

#endif