97 lines
2.2 KiB
C++
97 lines
2.2 KiB
C++
Bool echo_done;
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U0 (*fp_task_end_cb)();
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U0 (*fp_old_fill_buf)(SND_OUT_CONTAINER *buf,I64 buf_num)=NULL;
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U0 (*fp_old_copy_buf)(SND_IN_CONTAINER *buf,I64 buf_num)=NULL;
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#define NUM_BUF 8
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SND_IN_CONTAINER my_buf[SND_BUF_LEN*NUM_BUF];
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I64 my_ibuf_ptr,my_obuf_ptr;
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U0 EchoFillBuf(SND_OUT_CONTAINER *buf,I64)
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{
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I64 j;
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if (echo_done) return;
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j=0;
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while (j<SND_BUF_LEN) {
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buf[j++]=ToI64(snd_vol*my_buf[my_obuf_ptr++ &(SND_BUF_LEN*NUM_BUF-1)])<<16&0xFFFFFF00;
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buf[j++]=ToI64(snd_vol*my_buf[my_obuf_ptr++ &(SND_BUF_LEN*NUM_BUF-1)])<<16&0xFFFFFF00;
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}
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}
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U0 EchoCopyBuf(SND_IN_CONTAINER *buf,I64)
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{
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I64 j;
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if (echo_done) return;
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j=0;
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while (j<SND_BUF_LEN) {
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my_buf[my_ibuf_ptr++ &(SND_BUF_LEN*NUM_BUF-1)]=buf[j++];
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my_buf[my_ibuf_ptr++ &(SND_BUF_LEN*NUM_BUF-1)]=buf[j++];
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}
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}
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U0 EchoTaskEndCB()
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{
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echo_done=TRUE;
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HDStop(TRUE,FALSE);
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fp_snd_fill_buf=fp_old_fill_buf;
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fp_snd_copy_buf=fp_old_copy_buf;
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if (fp_task_end_cb)
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(*fp_task_end_cb)();
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else
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Exit;
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}
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U0 DrawIt(CTask *task,CDC *dc)
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{
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SND_IN_CONTAINER *buf=_hda->istr0_buf[0];
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I64 i,x1,y1,x2=0,y2=0,
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cy=task->win_pixel_height>>1;
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dc->color=BLUE;
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for (i=0;i<SND_BUF_LEN;i++) {
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x1=i*task->win_pixel_width/SND_BUF_LEN;
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y1=cy-buf[i]*cy/MAX_I16;
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GrLine(dc,x2,y2,x1,y1);
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x2=x1;
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y2=y1;
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}
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}
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U0 EchoDemo()
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{
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if (snd_dev!=SD_HD_AUDIO) {
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"Only works for HD Audio.\n";
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return;
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}
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SettingsPush; //See $LK,"SettingsPush","MN:SettingsPush"$
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HDRun(TRUE,TRUE);
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echo_done=FALSE;
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fp_task_end_cb=Fs->task_end_cb;
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Fs->task_end_cb=&EchoTaskEndCB; //Catch <CTRL-ALT-X> or Kill() task
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my_ibuf_ptr=(NUM_BUF/2)*SND_BUF_LEN;
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my_obuf_ptr=0;
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fp_old_fill_buf=fp_snd_fill_buf;
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fp_old_copy_buf=fp_snd_copy_buf;
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fp_snd_fill_buf=&EchoFillBuf;
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fp_snd_copy_buf=&EchoCopyBuf;
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DocCursor;
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DocClear;
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Fs->draw_it=&DrawIt;
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try
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GetChar;
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catch { //Catch <CTRL-ALT-C>, but pass it on to next higher handler.
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fp_snd_fill_buf=fp_old_fill_buf;
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fp_snd_copy_buf=fp_old_copy_buf;
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Fs->task_end_cb=fp_task_end_cb;
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}
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echo_done=TRUE;
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HDStop(TRUE,FALSE);
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fp_snd_fill_buf=fp_old_fill_buf;
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fp_snd_copy_buf=fp_old_copy_buf;
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Fs->task_end_cb=fp_task_end_cb;
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SettingsPop;
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}
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EchoDemo;
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