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Code Issues Releases Wiki Activity

new tuning for dvbc

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This commit is contained in:
drmocm 2023-09-16 14:41:46 +02:00
parent 95d23821b7
commit 9af63d41f7
1 changed files with 30 additions and 111 deletions
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141
apps/modtest.c
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@ -1003,7 +1003,8 @@ int mci_set_stream( int fd, uint8_t stream, uint8_t channel, uint8_t standard,
}
void set_dvbt_mods(int adapt, int chans, uint32_t start_freq, write_data *wd)
void set_dvb_mods(int adapt, int chans, uint32_t start_freq,
enum fe_delivery_system delsys, write_data *wd)
{
if ((mci_set_output_simple(adapt, chans) < 0)||
(mci_set_channels_simple(adapt, start_freq, chans)< 0))
@ -1019,16 +1020,32 @@ void set_dvbt_mods(int adapt, int chans, uint32_t start_freq, write_data *wd)
char *device;
int fd;
wd->tp[i].tpid = 1; // all the same transport stream id
wd->tp[i].delsys = SYS_DVBT;
wd->tp[i].freq = start_freq+8000000*i;
wd->tp[i].qam = 2;
wd->tp[i].symbolrate = 0;
wd->tp[i].bandwidth = 0;
wd->tp[i].guard = 0;
wd->tp[i].code_rate = 4;
wd->tp[i].trans_mode = MOD_STANDARD_DVBT_8;
switch(delsys){
case SYS_DVBT:
wd->tp[i].tpid = 1; // all the same transport stream id
wd->tp[i].delsys = SYS_DVBT;
wd->tp[i].freq = start_freq+8000000*i;
wd->tp[i].qam = 2;
wd->tp[i].symbolrate = 0;
wd->tp[i].bandwidth = 0;
wd->tp[i].guard = 0;
wd->tp[i].code_rate = 4;
wd->tp[i].trans_mode = MOD_STANDARD_DVBT_8;
break;
case SYS_DVBC_ANNEX_A:
wd->tp[i].tpid = i;
wd->tp[i].delsys = SYS_DVBC_ANNEX_A;
wd->tp[i].freq = start_freq+8000000*i;
wd->tp[i].qam = QAM_256;
wd->tp[i].symbolrate = 6900000;
wd->tp[i].bandwidth = 0;
wd->tp[i].guard = 0;
wd->tp[i].code_rate = 0;
wd->tp[i].trans_mode = 0;
break;
}
device = malloc(sizeof(char)*40);
snprintf(device,35,"/dev/dvb/adapter%d/mod%d",adapt,i);
fd = open(device, O_RDWR);
@ -1045,104 +1062,6 @@ void set_dvbt_mods(int adapt, int chans, uint32_t start_freq, write_data *wd)
}
}
//++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
//++++++++++++++++++++++++++++++++DVBC MOD++++++++++++++++++++++++++++++++
static int set_property(int fd, uint32_t cmd, uint32_t data)
{
struct dtv_property p;
struct dtv_properties c;
int ret;
p.cmd = cmd;
c.num = 1;
c.props = &p;
p.u.data = data;
ret = ioctl(fd, FE_SET_PROPERTY, &c);
if (ret < 0) {
fprintf(stderr, "FE_SET_PROPERTY returned %d\n", errno);
return -1;
}
return 0;
}
static int set_input_bitrate(int fd, uint64_t data)
{
struct dtv_property p;
struct dtv_properties c;
int ret;
p.cmd = MODULATOR_INPUT_BITRATE;
c.num = 1;
c.props = &p;
p.u.data64 = data;
ret = ioctl(fd, FE_SET_PROPERTY, &c);
if (ret < 0) {
fprintf(stderr, "FE_SET_PROPERTY returned %d\n", errno);
return -1;
}
return 0;
}
void set_dvbc_mods(int adapt, int chans, uint32_t start_freq, write_data *wd)
{
uint32_t freq = start_freq;
uint8_t qam = QAM_256;
uint32_t sym = 6900000;
wd->chans = chans;
wd->fd_out = (int *)malloc(chans*sizeof(int));
memset(wd->fd_out,0,chans*sizeof(int));
for (int i = 0; i < chans; i++){
char *device;
int fd;
wd->tp[i].tpid = i;
wd->tp[i].delsys = SYS_DVBC_ANNEX_A;
wd->tp[i].freq = freq;
wd->tp[i].qam = qam;
wd->tp[i].symbolrate = sym;
wd->tp[i].bandwidth = 0;
wd->tp[i].guard = 0;
wd->tp[i].code_rate = 0;
wd->tp[i].trans_mode = 0;
device = malloc(sizeof(char)*40);
snprintf(device,35,"/dev/dvb/adapter%d/mod%d",adapt,i);
fd = open(device, O_RDWR);
if( fd < 0 )
{
fprintf(stderr,"Error opening %s : %s\n",device,strerror(errno));
free(device);
exit(1);
}
if (set_property(fd, MODULATOR_FREQUENCY, freq) < 0){
fprintf(stderr,"setting freq %d failed\n",freq);
exit(1);
}
if (set_property(fd, MODULATOR_MODULATION, qam) < 0){
fprintf(stderr,"setting qam %d failed\n",qam);
exit(1);
}
if (set_property(fd, MODULATOR_SYMBOL_RATE, sym) < 0){
fprintf(stderr,"setting sym %d failed\n",sym);
exit(1);
}
if (set_input_bitrate(fd, (DEFAULT_BIT_RATE_C << 32)) < 0){
fprintf(stderr,"setting bitrate %d failed\n",
(int)DEFAULT_BIT_RATE_C);
exit(1);
}
freq += 8000000;
close(fd);
free(device);
}
}
//+++++++++++++++++++++++++++++CLI++++++++++++++++++++++++++++++++++++++++
//++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
@ -1296,9 +1215,9 @@ int main(int argc, char **argv)
chans = ddevices.ndevs[adapt];
if (dvbt){
set_dvbt_mods(adapt, chans, start_freq, &wd);
set_dvb_mods(adapt, chans, start_freq, SYS_DVBT, &wd);
} else {
set_dvbc_mods(adapt, chans, start_freq, &wd);
set_dvb_mods(adapt, chans, start_freq, SYS_DVBC_ANNEX_A, &wd);
}
fprintf(stderr,"Reading from %s\n", filename);