#include <sys/types.h>#include <stdio.h>#include <unistd.h>#include <fcntl.h>#include <stdlib.h>#include "audio.h"#include <stdlib.h>#include <os2.h>#define  INCL_OS2MM#include <os2me.h>#define BUFNUM     20#define BUFSIZE 16384typedef struct {    ULONG operation;    ULONG operand1;    ULONG operand2;    ULONG operand3;} ple;MCI_WAVE_SET_PARMS msp;MCI_PLAY_PARMS mpp;int id, pos=0;ple pl[BUFNUM+2];int audio_open(struct audio_info_struct *ai){  char *buf[BUFNUM];  int i;  ULONG rc;  MCI_OPEN_PARMS mop;  pl[0].operation = (ULONG)NOP_OPERATION;  pl[0].operand1 = 0;  pl[0].operand2 = 0;  pl[0].operand3 = 0;  for(i = 0; i < BUFNUM; i++) {    buf[i] = (char*)malloc(BUFSIZE);    memset(buf[i], 0, BUFSIZE);    pl[i+1].operation = (ULONG)DATA_OPERATION;    pl[i+1].operand1 = (ULONG)buf[i];    pl[i+1].operand2 = BUFSIZE/2;    pl[i+1].operand3 = 0;  }  pl[BUFNUM+1].operation = (ULONG)BRANCH_OPERATION;  pl[BUFNUM+1].operand1 = 0;  pl[BUFNUM+1].operand2 = 1;  pl[BUFNUM+1].operand3 = 0;  mop.pszDeviceType = (PSZ)MCI_DEVTYPE_WAVEFORM_AUDIO_NAME;  mop.pszElementName = (PSZ)&pl;  rc = mciSendCommand(0, MCI_OPEN, MCI_WAIT                                 | MCI_OPEN_PLAYLIST, (PVOID)&mop, 0);  if (rc) {    puts("open audio device failed!");    exit(1);  }  id = mop.usDeviceID;  msp.usBitsPerSample = 16;  rc = mciSendCommand(id, MCI_SET, MCI_WAIT | MCI_WAVE_SET_BITSPERSAMPLE, (PVOID)&msp, 0);  return 0;}int audio_reset_parameters(struct audio_info_struct *ai){  static int audio_initialized = FALSE, i;  if (audio_initialized) {    while (pl[pos].operand3 < pl[pos].operand2) _sleep2(125);    for(i = 1; i <= BUFNUM; i++) {      memset((char*)pl[i].operand1, 0, BUFSIZE);      pl[i].operand2 = BUFSIZE;      pl[i].operand3 = 0;    }    _sleep2(2000);    mciSendCommand(id, MCI_STOP, MCI_WAIT, (PVOID)&mpp, 0);    for(i = 1; i <= BUFNUM; i++) {      memset((char*)pl[i].operand1, 0, BUFSIZE);      pl[i].operand2 = BUFSIZE/2;      pl[i].operand3 = 0;    }    pos = 0;  }  msp.ulSamplesPerSec = ai->rate;  msp.usChannels = ai->channels;  mciSendCommand(id, MCI_SET, MCI_WAIT                             | MCI_WAVE_SET_SAMPLESPERSEC                             | MCI_WAVE_SET_CHANNELS, (PVOID)&msp, 0);  mciSendCommand(id, MCI_PLAY, 0, (PVOID)&mpp, 0);  if(!audio_initialized) audio_initialized = TRUE;  return 0;}int audio_rate_best_match(struct audio_info_struct *ai){  return 0;}int audio_set_rate(struct audio_info_struct *ai){  return 0;}int audio_play_samples(struct audio_info_struct *ai,unsigned char *buf,int len){  pos = pos + 1;  if (pos > BUFNUM) pos = 1;  while (pl[pos].operand3 < pl[pos].operand2) _sleep2(125);  memcpy((char*)pl[pos].operand1, buf, len);  pl[pos].operand2 = len;  pl[pos].operand3 = 0;  return len;}int audio_close(struct audio_info_struct *ai){  ULONG rc;  pl[pos].operation = (ULONG)EXIT_OPERATION;  pl[pos].operand2 = 0;  pl[pos].operand3 = 0;  pos = pos - 1;  if(pos == 0) pos = BUFNUM;  while (pl[pos].operand3 < pl[pos].operand2) _sleep2(250);  _sleep2(2000);  rc = mciSendCommand(id, MCI_CLOSE, MCI_WAIT, (PVOID)NULL, 0);  return 0;}