dvb_tune.c

自己移植的linux下的流媒体播放器原代码,支持mms协议,支持ftp和http协议.

			break;
#ifdef DVB_ATSC
			case FE_ATSC:
			mp_msg(MSGT_DEMUX, MSGL_V, "Event:  Frequency: %d\n",feparams->frequency);
			mp_msg(MSGT_DEMUX, MSGL_V, "        Modulation: %d\n",feparams->u.vsb.modulation);
			break;
#endif
			default:
			break;
		}
		}

		strength=0;
		if(ioctl(fd_frontend,FE_READ_BER,&strength) >= 0)
		mp_msg(MSGT_DEMUX, MSGL_V, "Bit error rate: %d\n",strength);

		strength=0;
		if(ioctl(fd_frontend,FE_READ_SIGNAL_STRENGTH,&strength) >= 0)
		mp_msg(MSGT_DEMUX, MSGL_V, "Signal strength: %d\n",strength);

		strength=0;
		if(ioctl(fd_frontend,FE_READ_SNR,&strength) >= 0)
		mp_msg(MSGT_DEMUX, MSGL_V, "SNR: %d\n",strength);

		strength=0;
		if(ioctl(fd_frontend,FE_READ_UNCORRECTED_BLOCKS,&strength) >= 0)
		mp_msg(MSGT_DEMUX, MSGL_V, "UNC: %d\n",strength);
		
		print_status(festatus);
	}
	else
	{
		mp_msg(MSGT_DEMUX, MSGL_ERR, "Not able to lock to the signal on the given frequency\n");
		return -1;
	}
	return 0;
}

#else

static int check_status(int fd_frontend,FrontendParameters* feparams,int tuner_type,uint32_t base)
{
	int i,res;
	int32_t strength;
	fe_status_t festatus;
	FrontendEvent event;
	
	struct pollfd pfd[1];

	while(1)
	{
	    if(ioctl(fd_frontend, FE_GET_EVENT, &event) == -1)
	    break;
	}

	i = 0; res = -1;
	while ((i < 3) && (res < 0))
	{
		if (ioctl(fd_frontend,FE_SET_FRONTEND,feparams) < 0)
		{
			mp_msg(MSGT_DEMUX, MSGL_ERR, "ERROR tuning channel\n");
			return -1;
		}

		pfd[0].fd = fd_frontend;
		pfd[0].events = POLLIN | POLLPRI;

		if(poll(pfd,1,10000) > 0)
		{
			if (pfd[0].revents & POLLPRI)
			{
				mp_msg(MSGT_DEMUX, MSGL_V, "Getting frontend event\n");
				if ( ioctl(fd_frontend, FE_GET_EVENT, &event) < 0)
				{
					mp_msg(MSGT_DEMUX, MSGL_ERR, "FE_GET_EVENT");
					return -1;
				}
				mp_msg(MSGT_DEMUX, MSGL_V, "Received ");
				switch(event.type)
				{
					case FE_UNEXPECTED_EV:
					mp_msg(MSGT_DEMUX, MSGL_V, "unexpected event\n");
					res = -1;
					break;

					case FE_FAILURE_EV:
					mp_msg(MSGT_DEMUX, MSGL_V, "failure event\n");
					res = -1;
					break;

					case FE_COMPLETION_EV:
					mp_msg(MSGT_DEMUX, MSGL_V, "completion event\n");
					res = 0;
					break;
				}
			}
			i++;
		}
	}

	if (res > 0)
	switch (event.type)
	{
		case FE_UNEXPECTED_EV: mp_msg(MSGT_DEMUX, MSGL_V, "FE_UNEXPECTED_EV\n");
			break;
		case FE_COMPLETION_EV: mp_msg(MSGT_DEMUX, MSGL_V, "FE_COMPLETION_EV\n");
			break;
		case FE_FAILURE_EV: mp_msg(MSGT_DEMUX, MSGL_V, "FE_FAILURE_EV\n");
			break;
	}

	if (event.type == FE_COMPLETION_EV)
	{
		switch(tuner_type)
		{
			case FE_OFDM:
			mp_msg(MSGT_DEMUX, MSGL_V, "Event:  Frequency: %d\n",event.u.completionEvent.Frequency);
			break;

			case FE_QPSK:
			mp_msg(MSGT_DEMUX, MSGL_V, "Event:  Frequency: %d\n",(unsigned int)((event.u.completionEvent.Frequency)+base));
			mp_msg(MSGT_DEMUX, MSGL_V, "        SymbolRate: %d\n",event.u.completionEvent.u.qpsk.SymbolRate);
			mp_msg(MSGT_DEMUX, MSGL_V, "        FEC_inner:  %d\n",event.u.completionEvent.u.qpsk.FEC_inner);
			mp_msg(MSGT_DEMUX, MSGL_V, "\n");
			break;

			case FE_QAM:
			mp_msg(MSGT_DEMUX, MSGL_V, "Event:  Frequency: %d\n",event.u.completionEvent.Frequency);
			mp_msg(MSGT_DEMUX, MSGL_V, "        SymbolRate: %d\n",event.u.completionEvent.u.qpsk.SymbolRate);
			mp_msg(MSGT_DEMUX, MSGL_V, "        FEC_inner:  %d\n",event.u.completionEvent.u.qpsk.FEC_inner);
			break;

			default:
			break;
		}

		strength=0;
		if(ioctl(fd_frontend,FE_READ_BER,&strength) >= 0)
		mp_msg(MSGT_DEMUX, MSGL_V, "Bit error rate: %d\n",strength);

		strength=0;
		if(ioctl(fd_frontend,FE_READ_SIGNAL_STRENGTH,&strength) >= 0)
		mp_msg(MSGT_DEMUX, MSGL_V, "Signal strength: %d\n",strength);

		strength=0;
		if(ioctl(fd_frontend,FE_READ_SNR,&strength) >= 0)
		mp_msg(MSGT_DEMUX, MSGL_V, "SNR: %d\n",strength);

		festatus=0;
		mp_msg(MSGT_DEMUX, MSGL_V, "FE_STATUS:");
		
		if(ioctl(fd_frontend,FE_READ_STATUS,&festatus) >= 0)
		    print_status(festatus);
		else
		    mp_msg(MSGT_DEMUX, MSGL_ERR, " ERROR, UNABLE TO READ_STATUS");
		    
		mp_msg(MSGT_DEMUX, MSGL_V, "\n");
	}
	else
	{
		mp_msg(MSGT_DEMUX, MSGL_V, "Not able to lock to the signal on the given frequency\n");
		return -1;
	}
	return 0;
}
#endif

#ifdef HAVE_DVB_HEAD

static struct diseqc_cmd {
   struct dvb_diseqc_master_cmd cmd;
   uint32_t wait;
};

static int diseqc_send_msg(int fd, fe_sec_voltage_t v, struct diseqc_cmd *cmd,
		     fe_sec_tone_mode_t t, fe_sec_mini_cmd_t b)
{
   if(ioctl(fd, FE_SET_TONE, SEC_TONE_OFF) == -1)
    return -1;
   if(ioctl(fd, FE_SET_VOLTAGE, v) == -1)
    return -1;
   usleep(15 * 1000);
   if(ioctl(fd, FE_DISEQC_SEND_MASTER_CMD, &cmd->cmd) == -1)
    return -1;
   usleep(cmd->wait * 1000);
   usleep(15 * 1000);
   if(ioctl(fd, FE_DISEQC_SEND_BURST, b) == -1)
    return -1;
   usleep(15 * 1000);
   if(ioctl(fd, FE_SET_TONE, t) == -1)
    return -1;

    return 0;
}

/* digital satellite equipment control,
 * specification is available from http://www.eutelsat.com/
 */
static int do_diseqc(int secfd, int sat_no, int polv, int hi_lo)
{
   struct diseqc_cmd cmd =  { {{0xe0, 0x10, 0x38, 0xf0, 0x00, 0x00}, 4}, 0 };

   /* param: high nibble: reset bits, low nibble set bits,
    * bits are: option, position, polarizaion, band
    */
   cmd.cmd.msg[3] =
       0xf0 | (((sat_no * 4) & 0x0f) | (hi_lo ? 1 : 0) | (polv ? 0 : 2));

   return diseqc_send_msg(secfd, polv ? SEC_VOLTAGE_13 : SEC_VOLTAGE_18,
		   &cmd, hi_lo ? SEC_TONE_ON : SEC_TONE_OFF,
		   (sat_no / 4) % 2 ? SEC_MINI_B : SEC_MINI_A);
}

#else

static int do_diseqc(int secfd, int sat_no, int polv, int hi_lo)
{
	struct secCommand scmd;
        struct secCmdSequence scmds;

        scmds.continuousTone = (hi_lo ? SEC_TONE_ON : SEC_TONE_OFF);
        scmds.voltage = (polv ? SEC_VOLTAGE_13 : SEC_VOLTAGE_18);
        scmds.miniCommand = SEC_MINI_NONE;

        scmd.type = SEC_CMDTYPE_DISEQC;
        scmds.numCommands = 1;
        scmds.commands = &scmd;

        scmd.u.diseqc.addr = 0x10;
        scmd.u.diseqc.cmd = 0x38;
        scmd.u.diseqc.numParams = 1;
        scmd.u.diseqc.params[0] = 0xf0 |
                                  (((sat_no) << 2) & 0x0F) |
				  (hi_lo ? 1 : 0) |
                                  (polv ? 0 : 2); 

        if (ioctl(secfd,SEC_SEND_SEQUENCE,&scmds) < 0)
	{
          mp_msg(MSGT_DEMUX, MSGL_ERR, "Error sending DisEqC");
          return -1;
        }
	
	return 0;
}
#endif

static int tune_it(int fd_frontend, int fd_sec, unsigned int freq, unsigned int srate, char pol, int tone,
	fe_spectral_inversion_t specInv, unsigned int diseqc, fe_modulation_t modulation, fe_code_rate_t HP_CodeRate,
	fe_transmit_mode_t TransmissionMode, fe_guard_interval_t guardInterval, fe_bandwidth_t bandwidth,
	fe_code_rate_t LP_CodeRate, fe_hierarchy_t hier)
{
  int res, hi_lo, dfd;
#ifdef HAVE_DVB_HEAD
  struct dvb_frontend_parameters feparams;
  struct dvb_frontend_info fe_info;
#else
  FrontendParameters feparams;
  FrontendInfo fe_info;
  struct secStatus sec_state;
#endif


  mp_msg(MSGT_DEMUX, MSGL_V,  "TUNE_IT, fd_frontend %d, fd_sec %d\nfreq %lu, srate %lu, pol %c, tone %i, specInv, diseqc %u, fe_modulation_t modulation,fe_code_rate_t HP_CodeRate, fe_transmit_mode_t TransmissionMode,fe_guard_interval_t guardInterval, fe_bandwidth_t bandwidth\n",
	    fd_frontend, fd_sec, (long unsigned int)freq, (long unsigned int)srate, pol, tone, diseqc);


  if ( (res = ioctl(fd_frontend,FE_GET_INFO, &fe_info) < 0))
  {
  	mp_msg(MSGT_DEMUX, MSGL_FATAL, "FE_GET_INFO FAILED\n");
	return -1;
  }


#ifdef HAVE_DVB_HEAD
  mp_msg(MSGT_DEMUX, MSGL_V, "Using DVB card \"%s\"\n", fe_info.name);
#endif

  switch(fe_info.type)
  {
    case FE_OFDM:
#ifdef HAVE_DVB_HEAD
      if (freq < 1000000) freq*=1000UL;
      feparams.frequency=freq;
      feparams.inversion=specInv;
      feparams.u.ofdm.bandwidth=bandwidth;
      feparams.u.ofdm.code_rate_HP=HP_CodeRate;
      feparams.u.ofdm.code_rate_LP=LP_CodeRate;
      feparams.u.ofdm.constellation=modulation;
      feparams.u.ofdm.transmission_mode=TransmissionMode;
      feparams.u.ofdm.guard_interval=guardInterval;
      feparams.u.ofdm.hierarchy_information=hier;
#else
      if (freq < 1000000) freq*=1000UL;
      feparams.Frequency=freq;
      feparams.Inversion=specInv;
      feparams.u.ofdm.bandWidth=bandwidth;
      feparams.u.ofdm.HP_CodeRate=HP_CodeRate;
      feparams.u.ofdm.LP_CodeRate=LP_CodeRate;
      feparams.u.ofdm.Constellation=modulation;
      feparams.u.ofdm.TransmissionMode=TransmissionMode;
      feparams.u.ofdm.guardInterval=guardInterval;
      feparams.u.ofdm.HierarchyInformation=hier;
#endif
      mp_msg(MSGT_DEMUX, MSGL_V, "tuning DVB-T to %d Hz, bandwidth: %d\n",freq, bandwidth);
      break;
    case FE_QPSK:
      if (freq > 2200000)
      {
        // this must be an absolute frequency
        if (freq < SLOF)
	{
#ifdef HAVE_DVB_HEAD
          freq = feparams.frequency=(freq-LOF1);
#else
          freq = feparams.Frequency=(freq-LOF1);
#endif
	    hi_lo = 0;
        }
	else
	{
#ifdef HAVE_DVB_HEAD
          freq = feparams.frequency=(freq-LOF2);
#else
          freq = feparams.Frequency=(freq-LOF2);
#endif
	    hi_lo = 1;
        }
      }
      else
      {
        // this is an L-Band frequency
#ifdef HAVE_DVB_HEAD
       feparams.frequency=freq;
#else
       feparams.Frequency=freq;
#endif
      }

#ifdef HAVE_DVB_HEAD
      feparams.inversion=specInv;
      feparams.u.qpsk.symbol_rate=srate;
      feparams.u.qpsk.fec_inner=HP_CodeRate;
      dfd = fd_frontend;
#else
      feparams.Inversion=specInv;
      feparams.u.qpsk.SymbolRate=srate;
      feparams.u.qpsk.FEC_inner=HP_CodeRate;
      dfd = fd_sec;
#endif

	mp_msg(MSGT_DEMUX, MSGL_V, "tuning DVB-S to Freq: %u, Pol: %c Srate: %d, 22kHz: %s, LNB:  %d\n",freq,pol,srate,hi_lo ? "on" : "off", diseqc);

   if(do_diseqc(dfd, diseqc, (pol == 'V' ? 1 : 0), hi_lo) == 0)
	mp_msg(MSGT_DEMUX, MSGL_V, "DISEQC SETTING SUCCEDED\n");
   else
   {
	mp_msg(MSGT_DEMUX, MSGL_ERR, "DISEQC SETTING FAILED\n");
	return -1;
   }
      break;
    case FE_QAM:
      mp_msg(MSGT_DEMUX, MSGL_V, "tuning DVB-C to %d, srate=%d\n",freq,srate);
#ifdef HAVE_DVB_HEAD
      feparams.frequency=freq;
      feparams.inversion=specInv;
      feparams.u.qam.symbol_rate = srate;
      feparams.u.qam.fec_inner = HP_CodeRate;
      feparams.u.qam.modulation = modulation;
#else
      feparams.Frequency=freq;
      feparams.Inversion=specInv;
      feparams.u.qam.SymbolRate = srate;
      feparams.u.qam.FEC_inner = HP_CodeRate;
      feparams.u.qam.QAM = modulation;
#endif
      break;
#ifdef DVB_ATSC
    case FE_ATSC:
      mp_msg(MSGT_DEMUX, MSGL_V, "tuning ATSC to %d, modulation=%d\n",freq,modulation);
      feparams.frequency=freq;
      feparams.u.vsb.modulation = modulation;
      break;
#endif
    default:
      mp_msg(MSGT_DEMUX, MSGL_V, "Unknown FE type. Aborting\n");
      return 0;
  }
  usleep(100000);

#ifndef HAVE_DVB_HEAD
  if (fd_sec) SecGetStatus(fd_sec, &sec_state);
#endif

  return(check_status(fd_frontend,&feparams,fe_info.type, (hi_lo ? LOF2 : LOF1)));
}