Difference between revisions of "DAB/DAB+"

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Line 289: Line 289:
 
         return 0;
 
         return 0;
 
}
 
}
 +
</pre>
 +
 +
==== Scan FM Frequencies ====
 +
 +
<pre>
 +
int media_scan_fmfrequencies(char *device, int devfd, int console, int running) {
 +
        int fd;
 +
        int rv;
 +
        int nlen;
 +
        char tmp[30];
 +
        if (devfd>=0)
 +
                fd = devfd;
 +
        else {
 +
                printf("opening device: %s\n", device);
 +
                fd = net_open(device, O_RDWR);
 +
        }
 +
 +
        if (fd>=0) {
 +
                int i;
 +
                int e;
 +
                int current_scan_index=-1;
 +
                struct fm_scan_setup setup;
 +
                struct fm_scan_parameters parameters;
 +
                memset(&parameters, 0x0, sizeof(struct fm_scan_parameters));
 +
                memset(&setup, 0x0, sizeof(struct fm_scan_setup));
 +
                printf("SCAN SETUP\n");
 +
                net_ioctl(fd, FM_SCAN_SETUP, &setup);
 +
 +
                do {
 +
                        net_ioctl(fd, FM_SCAN_NEXT_FREQUENCY, &parameters);
 +
        //              printf("LOCK STAT: %x - %d - %d\n", parameters.status, parameters.VALID, parameters.READFREQ);
 +
                        switch(parameters.status) {
 +
                        case FM_SCAN_LOCKED:
 +
                        {
 +
                                if (console>=0) {
 +
                                        printf("FREQUENCY: %d ", parameters.READFREQ);
 +
                                        rv=write(console, "[LOCKED]\n", 9);
 +
                                } else {
 +
                                        fprintf(stdout, "%d [LOCKED]\n", parameters.READFREQ);
 +
                                }
 +
                                break;
 +
                        }
 +
                        case FM_SCAN_SEARCHING:
 +
                                usleep(10000);
 +
                                break;
 +
                        case FM_SCAN_COMPLETE:
 +
                        {
 +
                                if (console>=0) {
 +
                                        rv=write(console, "[FINISHED]\n", 11);
 +
                                } else {
 +
                                        fprintf(stdout, "\nScan completed\n");
 +
                                }
 +
                                break;
 +
                        }
 +
                        }
 +
                        if (console>=0 && running == 0)
 +
                                break;
 +
                } while (parameters.status != FM_SCAN_COMPLETE);
 +
 +
                if (devfd == -1)
 +
                        net_close(fd);
 +
        }
 +
        return 0;
 +
}
 +
</pre>
 +
 +
==== Read RDS Data ====
 +
 +
<pre>
 +
net_ioctl(rdsfd, FM_RDS_STATUS, &data);
 +
struct fm_rds_data {
 +
        uint8_t rdssync; /* rds synchronized */
 +
        uint8_t pivalid; /* program identification */
 +
        uint8_t tpptyvalid; /* traffic program  / program type*/
 +
        uint16_t PI; /* program identification */
 +
        uint8_t PTY; /* program type */
 +
        uint8_t data[8]; /* representing the RDS blocks */
 +
} __attribute__((packed));
 
</pre>
 
</pre>
  

Revision as of 10:54, 29 July 2019

DAB/DAB+

The DAB/DAB+ USB Stick decodes DAB/DAB+ onchip and transfers the decoded audio data fully digital to the host system. Currently Linux and MacOS are supported.

Installation Linux

open a terminal and enter following commands: 

sudo -s
wget http://sundtek.de/media/sundtek_netinst.sh
chmod 777 sundtek_netinst.sh
./sundtek_netinst.sh

In case you want to distribute the local stations digitally you can also install our streaming server (again on the commandline) 

just run following commands:
sudo -s
/opt/bin/mediaclient --installstreamer

In case you want to use our DAB/DAB+ Player for X86-64 Bit Linux:

http://sundtek.de/media/Sundtek_DAB_FM_Radio-x86_64-2019-07-28_07_05.AppImage

Be sure you set the downloaded binary to executable before trying to run it (right mouse click, permissions, check executable)

Installation MacOSX

MacOSX: 

- https://www.sundtek.de/media/sundtek_driver_macosx_190728.0349.dmg
- https://www.sundtek.de/media/sundtek_dab_fm_player_190728.0245.dmg

First install the driver, afterwards run the DAB Player. The split driver also allows other application developer to integrate and use those devices.

Installation Raspberry PI

In case you don't want to use our radio application, the installation is the same as on a regular linux system 

sudo -s
wget http://sundtek.de/media/sundtek_netinst.sh
chmod 777 sundtek_netinst.sh
./sundtek_netinst.sh

Radio Application: 

cd $HOME
sudo apt-get install qt5-default
wget http://sundtek.de/media/dablet_raspbian.tar.gz
tar xf dablet_raspbian.tar.gz
./dablet

DAB/DAB+ commandline interface

scan for transponders: 

/opt/bin/mediaclient --scandabfrequencies /dev/dab0 
scanning: 5A / 174928000
scanning: 5B / 176640000
scanning: 5C / 178352000
[LOCKED]
scanning: 5D / 180064000
scanning: 6A / 181936000
scanning: 6B / 183648000
scanning: 6C / 185360000
scanning: 6D / 187072000
scanning: 7A / 188928000
scanning: 7B / 190640000
[LOCKED]
scanning: 7C / 192352000
scanning: 7D / 194064000
[LOCKED]
scanning: 8A / 195936000

tune to a transponder: 

/opt/bin/mediaclient -m DAB -f 194064000
Using device: /dev/dab0
Tuning: 194064000
[LOCKED]

turn on direct audio playback in the driver (the driver will try to play back audio via alsa, pulseaudio or oss: 

/opt/bin/mediaclient -m DAB -g off

scan a dab transponder: 

/opt/bin/mediaclient --scandabservices /dev/dab0 
Service Name, Service ID, Component ID
BR-Klassik         0xd314   0xb
Inforadio          0xd335   0x8
FH Europa          0xd496   0x3
radioeins          0xd332   0x1
radioBERLIN 88 8   0xd321   0x6
kulturradio        0xd323   0x5
Fritz              0xd333   0x7
Antenne            0xd431   0x0
SWR3               0xd3a3   0x4
Bayern 2           0xd412   0xc
WDR2               0xd392   0x2
MDR JUMP           0xd3c2   0xd
rbb TPEG           0xe0d11019   0xc00a
rbb EPG            0xe0d01019   0xc009

Tune to a specific DAB station: 

/opt/bin/mediaclient -m DAB -f 194064000 --sid 0xd321
Using device: /dev/dab0
Tuning: 194064000, 0xd321
[LOCKED]


Read signal statistics: 

/opt/bin/mediaclient --readsignal=0 -d /dev/dab0
FREQUENCY: 178352000  LOCKED: YES  RSSI: 172  SNR:  10 FIC_QUALITY: 100 CNR: 14
FREQUENCY: 178352000  LOCKED: YES  RSSI: 173  SNR:  10 FIC_QUALITY: 100 CNR: 13
FREQUENCY: 178352000  LOCKED: YES  RSSI: 172  SNR:  10 FIC_QUALITY: 100 CNR: 12
FREQUENCY: 178352000  LOCKED: YES  RSSI: 173  SNR:  10 FIC_QUALITY: 100 CNR: 13
FREQUENCY: 178352000  LOCKED: YES  RSSI: 173  SNR:  10 FIC_QUALITY: 100 CNR: 13
FREQUENCY: 178352000  LOCKED: YES  RSSI: 173  SNR:   9 FIC_QUALITY: 100 CNR: 12
FREQUENCY: 178352000  LOCKED: YES  RSSI: 173  SNR:   9 FIC_QUALITY: 100 CNR: 12

C API

Scan for DAB Frequencies

example: 

int media_scan_dabfrequencies(char *device, int devfd, int console, int running) {
        int fd;
        int rv;
        int nlen;
        char tmp[30];
        if (devfd>=0)
                fd = devfd;
        else
                fd = net_open(device, O_RDWR);

        if (fd>=0) {
                struct dab_frequency dabf;
                struct dab_tuner dabt;
                int i;
                int e;
                int current_scan_index=-1;
                struct dab_scan_setup setup;
                struct dab_scan_parameters parameters;
                memset(&parameters, 0x0, sizeof(struct dab_scan_parameters));
                memset(&setup, 0x0, sizeof(struct dab_scan_setup));
                net_ioctl(fd, DAB_SCAN_SETUP, &setup);

                do {
                        net_ioctl(fd, DAB_SCAN_NEXT_FREQUENCY, &parameters);
                        if (current_scan_index != parameters.scan_index) {
                                if (console>=0) {
                                        sprintf(tmp, "%s %d\n", dab_frequency_list[parameters.scan_index].channel, dab_frequency_list[parameters.scan_index].freq*1000);
                                        rv=write(console, tmp, nlen);
                                } else {
                                        fprintf(stdout, "%s %d\n", dab_frequency_list[parameters.scan_index].channel, dab_frequency_list[parameters.scan_index].freq*1000);
                                        fflush(stdout);
                                }
                        }

                        switch(parameters.status) {
                        case DAB_SCAN_LOCKED:
                        {
                                if (console>=0) {
                                        rv=write(console, "[LOCKED]\n", 9);
                                } else {
                                        fprintf(stdout, "[LOCKED]\n");
                                }
                                break;
                        }
                        case DAB_SCAN_SEARCHING:
                                usleep(10000);
                                break;
                        case DAB_SCAN_COMPLETE:
                        {
                                if (console>=0) {
                                        rv=write(console, "[FINISHED]\n", 11);
                                } else {
                                        fprintf(stdout, "\nScan completed\n");
                                }
                                break;
                        }
                        }
                        current_scan_index = parameters.scan_index;
                        if (console>=0 && running == 0)
                                break;
                } while (parameters.status != DAB_SCAN_COMPLETE);

                if (devfd == -1)
                        net_close(fd);
        }
        return 0;
}


Scan for DAB Services

int media_scan_dabservices(char *device) {
        int fd;
        int rv;
        int i=0;
        fd = net_open(device, O_RDWR);
        if (fd>=0) {
                struct dab_service service;
                printf("Service Name, Service ID, Component ID\n");
                while(1) {
                        service.id=i++;
                        rv = net_ioctl(fd, DAB_GET_SERVICE, &service);
                        if (rv == -1)
                                break;
                        printf("%16s\t0x%x\t0x%x\n", service.service_name, service.sid, service.comp[0]);
                }
                net_close(fd);
        }
        return 0;
}

DAB Get Date

int media_dab_get_date(char *device) { 

       int fd;
       struct dab_time t;
       printf("opening device: %s\n", device);
       fd = net_open(device, O_RDWR);
       memset(&t, 0x0, sizeof(struct dab_time));
       if (fd>=0) {
               printf("GET DAB TIME:\n");
               net_ioctl(fd, DAB_GET_TIME, &t);
               printf("%d-%d-%d %d:%d:%d\n", t.year, t.months, t.days, t.hours, t.minutes, t.seconds);
               net_close(fd);
       }
       return 0;

}

Dab get Ensemble Info

int media_dab_get_ensemble_info(char *device) {
        int fd;
        struct dab_ensemble_info info;
        printf("opening device: %s\n", device);
        fd = net_open(device, O_RDWR);
        if (fd>=0) {
                printf("GET ENSEMBLE INFO:\n");
                net_ioctl(fd, DAB_GET_ENSEMBLE_INFO, &info);
                printf("Ensemble Label: %s\n", info.label);
                net_close(fd);
        }
        return 0;
}

Mute

int set_mute(int fd, char *arg) {
        int type = 0;
        struct v4l2_control control;
        if (strcmp(arg, "off") == 0) {
                control.id = V4L2_CID_AUDIO_MUTE;
                control.value = 0;
                fprintf(stdout, "Enabling audiostream\n");
                net_ioctl(fd, VIDIOC_S_CTRL, &control);
        } else if (strcmp(arg, "on") == 0) {
                fprintf(stdout, "Disabling audiostream\n");
                control.id = V4L2_CID_AUDIO_MUTE;
                control.value = 1;
                net_ioctl(fd, VIDIOC_S_CTRL, &control);
        } else
                fprintf(stdout, "Wrong argument [%s] choose between on|off\n", arg);

        return 0;
}

Scan FM Frequencies

int media_scan_fmfrequencies(char *device, int devfd, int console, int running) {
        int fd;
        int rv;
        int nlen;
        char tmp[30];
        if (devfd>=0)
                fd = devfd;
        else {
                printf("opening device: %s\n", device);
                fd = net_open(device, O_RDWR);
        }

        if (fd>=0) {
                int i;
                int e;
                int current_scan_index=-1;
                struct fm_scan_setup setup;
                struct fm_scan_parameters parameters;
                memset(&parameters, 0x0, sizeof(struct fm_scan_parameters));
                memset(&setup, 0x0, sizeof(struct fm_scan_setup));
                printf("SCAN SETUP\n");
                net_ioctl(fd, FM_SCAN_SETUP, &setup);

                do {
                        net_ioctl(fd, FM_SCAN_NEXT_FREQUENCY, &parameters);
        //              printf("LOCK STAT: %x - %d - %d\n", parameters.status, parameters.VALID, parameters.READFREQ);
                        switch(parameters.status) {
                        case FM_SCAN_LOCKED:
                        {
                                if (console>=0) {
                                        printf("FREQUENCY: %d ", parameters.READFREQ);
                                        rv=write(console, "[LOCKED]\n", 9);
                                } else {
                                        fprintf(stdout, "%d [LOCKED]\n", parameters.READFREQ);
                                }
                                break;
                        }
                        case FM_SCAN_SEARCHING:
                                usleep(10000);
                                break;
                        case FM_SCAN_COMPLETE:
                        {
                                if (console>=0) {
                                        rv=write(console, "[FINISHED]\n", 11);
                                } else {
                                        fprintf(stdout, "\nScan completed\n");
                                }
                                break;
                        }
                        }
                        if (console>=0 && running == 0)
                                break;
                } while (parameters.status != FM_SCAN_COMPLETE);

                if (devfd == -1)
                        net_close(fd);
        }
        return 0;
}

Read RDS Data

net_ioctl(rdsfd, FM_RDS_STATUS, &data);
struct fm_rds_data {
        uint8_t rdssync; /* rds synchronized */
        uint8_t pivalid; /* program identification */
        uint8_t tpptyvalid; /* traffic program  / program type*/
        uint16_t PI; /* program identification */
        uint8_t PTY; /* program type */
        uint8_t data[8]; /* representing the RDS blocks */
} __attribute__((packed));

etc.

There are a few more features, in case you need more details just contact us.

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