int iec958buf_fill_zero()
{
int zero_filled_cnt=0,i2s_status=0,write_ret=0;
char zerobuf[2048]={0};
ioctl(dev_fd, AUDIO_SPDIF_GET_I2S_ENABLE_STATUS, &i2s_status);
while((zero_filled_cnt<iec958_buffer_size) && i2s_status )
{
write_ret=iec958_packed_frame_write_958buf(zerobuf,2048);
if(write_ret)
break;
zero_filled_cnt+=2048;
ioctl(dev_fd, AUDIO_SPDIF_GET_I2S_ENABLE_STATUS, &i2s_status);
}
return 0;
}
int dts_transenc_process_frame()
{
int rv;
if(write_success_flag)
{
rv=pcmenc_read_pcm(stream, input_size);//xujian
if(rv==0)/* no enough pcm data in the buffer */
{
//adec_print("=====read data failed :%d input_size:%d \n",rv,input_size);
if(iec958_check_958buf_level() == 0){
adec_print("transenc:insert zero pcm data \n");
memset(stream,0,input_size);//insert zero pcm data when 958 hw buffer underrun
}
else{
usleep(1000);
return -1;
}
}
#ifdef DUMP_FILE
FILE *fp1=fopen("/mnt/sda4/a.pcm","a+");
fwrite(stream,1,input_size,fp1);
fclose(fp1);
#endif
rv = enc_ops.enc_encode(dts_transenc_info, stream, output, &output_size);//encode frame
#ifdef DUMP_FILE
FILE *fp2=fopen("/mnt/sda4/a.dts","a+");
fwrite(output,1,output_size,fp2);
fclose(fp2);
#endif
rv = iec958_pack_frame(output, output_size);
}
rv = iec958_packed_frame_write_958buf(output, output_size);
if(rv==-1){
write_success_flag=0;
usleep(1000);
}
else
write_success_flag=1;
//adec_print("===pack frame write 958 ret:%d size:%d \n",rv,output_size);
return 1;
}
