1 |
root |
1.1 |
=head1 NAME |
2 |
|
|
|
3 |
|
|
Linux::DVB - interface to (some parts of) the Linux DVB API |
4 |
|
|
|
5 |
|
|
=head1 SYNOPSIS |
6 |
|
|
|
7 |
|
|
use Linux::DVB; |
8 |
|
|
|
9 |
|
|
=head1 DESCRIPTION |
10 |
|
|
|
11 |
|
|
This module provides an interface to the Linux DVB API. It is a straightforward |
12 |
|
|
translation of the C API. You should read the Linux DVB API description to make |
13 |
|
|
any sense of this module. It can be found here: |
14 |
|
|
|
15 |
root |
1.5 |
http://www.linuxtv.org/docs/dvbapi/dvbapi.html |
16 |
root |
1.1 |
|
17 |
|
|
All constants from F<frontend.h> and F<demux.h> are exported by their C |
18 |
|
|
name and by default. |
19 |
|
|
|
20 |
|
|
Noteworthy differences to the C API: unions and sub-structs are usually |
21 |
|
|
translated into flat perl hashes, i.e C<struct.u.qam.symbol_rate> |
22 |
|
|
becomes C<< $struct->{symbol_rate} >>. |
23 |
|
|
|
24 |
root |
1.13 |
Noteworthy limitations of this module include: No interface to the video, |
25 |
|
|
audio and net devices. If you need this functionality bug the author. |
26 |
root |
1.1 |
|
27 |
|
|
=cut |
28 |
|
|
|
29 |
|
|
package Linux::DVB; |
30 |
|
|
|
31 |
|
|
use Fcntl (); |
32 |
|
|
|
33 |
|
|
BEGIN { |
34 |
root |
1.15 |
$VERSION = '1.01'; |
35 |
root |
1.1 |
@ISA = qw(Exporter); |
36 |
|
|
|
37 |
|
|
require XSLoader; |
38 |
|
|
XSLoader::load __PACKAGE__, $VERSION; |
39 |
|
|
|
40 |
|
|
require Exporter; |
41 |
|
|
|
42 |
|
|
my %consts = &_consts; |
43 |
|
|
my $consts; |
44 |
|
|
while (my ($k, $v) = each %consts) { |
45 |
|
|
push @EXPORT, $k; |
46 |
|
|
$consts .= "sub $k(){$v}\n"; |
47 |
|
|
} |
48 |
|
|
eval $consts; |
49 |
|
|
} |
50 |
|
|
|
51 |
|
|
sub new { |
52 |
|
|
my ($class, $path, $mode) = @_; |
53 |
|
|
|
54 |
|
|
my $self = bless { path => $path, mode => $mode }, $class; |
55 |
|
|
sysopen $self->{fh}, $path, $mode | &Fcntl::O_NONBLOCK |
56 |
|
|
or die "$path: $!"; |
57 |
|
|
$self->{fd} = fileno $self->{fh}; |
58 |
|
|
|
59 |
|
|
$self; |
60 |
|
|
} |
61 |
|
|
|
62 |
|
|
sub fh { $_[0]{fh} } |
63 |
|
|
sub fd { $_[0]{fd} } |
64 |
|
|
|
65 |
|
|
sub blocking { |
66 |
|
|
fcntl $_[0]{fh}, &Fcntl::F_SETFL, $_[1] ? 0 : &Fcntl::O_NONBLOCK; |
67 |
|
|
} |
68 |
|
|
|
69 |
|
|
package Linux::DVB::Frontend; |
70 |
|
|
|
71 |
|
|
@ISA = qw(Linux::DVB); |
72 |
|
|
|
73 |
|
|
=head1 Linux::DVB::Frontend CLASS |
74 |
|
|
|
75 |
|
|
=head2 SYNOPSIS |
76 |
|
|
|
77 |
|
|
my $fe = new Linux::DVB::Frontend $path, $writable; |
78 |
|
|
|
79 |
|
|
my $fe = new Linux::DVB::Frontend |
80 |
|
|
"/dev/dvb/adapter0/frontend0", 1; |
81 |
|
|
|
82 |
|
|
$fe->fh; # filehandle |
83 |
|
|
$fe->fd; # fileno |
84 |
|
|
$fe->blocking (0); # or 1 |
85 |
|
|
|
86 |
|
|
$fe->{name} |
87 |
|
|
$fe->{type} |
88 |
|
|
$fe->frontend_info->{name} |
89 |
|
|
|
90 |
|
|
$fe->status & FE_HAS_LOCK |
91 |
|
|
print $fe->ber, $fe->snr, $fe->signal_strength, $fe->uncorrected; |
92 |
|
|
|
93 |
|
|
my $tune = $fe->parameters; |
94 |
|
|
$tune->{frequency}; |
95 |
|
|
$tune->{symbol_rate}; |
96 |
|
|
|
97 |
root |
1.6 |
=over 4 |
98 |
|
|
|
99 |
root |
1.1 |
=cut |
100 |
|
|
|
101 |
|
|
sub new { |
102 |
|
|
my ($class, $path, $mode) = @_; |
103 |
|
|
my $self = $class->SUPER::new ($path, $mode ? &Fcntl::O_RDWR : &Fcntl::O_RDONLY); |
104 |
|
|
|
105 |
|
|
%$self = ( %$self, %{ $self->frontend_info } ); |
106 |
|
|
|
107 |
|
|
$self; |
108 |
|
|
} |
109 |
|
|
|
110 |
root |
1.5 |
=item $fe->set (parameter => value, ...) |
111 |
|
|
|
112 |
|
|
Sets frontend parameters. All values are stuffed into the |
113 |
|
|
C<dvb_frontend_parameters> structure without conversion and passed to |
114 |
|
|
FE_SET_FRONTEND. |
115 |
|
|
|
116 |
|
|
Returns true on success. |
117 |
|
|
|
118 |
|
|
All modes: |
119 |
|
|
|
120 |
|
|
frequency => |
121 |
|
|
inversion => |
122 |
|
|
|
123 |
|
|
QPSK frontends: |
124 |
|
|
|
125 |
|
|
symbol_rate => |
126 |
|
|
fec_inner => |
127 |
|
|
|
128 |
|
|
QAM frontends: |
129 |
|
|
|
130 |
|
|
symbol_rate => |
131 |
|
|
modulation => |
132 |
|
|
|
133 |
|
|
QFDM frontends: |
134 |
|
|
|
135 |
|
|
bandwidth => |
136 |
|
|
code_rate_HP => |
137 |
|
|
code_rate_LP => |
138 |
|
|
constellation => |
139 |
|
|
transmission_mode => |
140 |
|
|
|
141 |
|
|
=cut |
142 |
|
|
|
143 |
|
|
sub set { |
144 |
|
|
my ($self) = shift; |
145 |
|
|
_set $self->{fd}, { @_ }, $self->{type} |
146 |
|
|
} |
147 |
|
|
|
148 |
|
|
=item $fe->parameters |
149 |
|
|
|
150 |
|
|
Calls FE_GET_FRONTEND and returns a hash reference that contains the same keys |
151 |
|
|
as given to the C<set> method. |
152 |
|
|
|
153 |
|
|
Example: |
154 |
|
|
|
155 |
|
|
Data::Dumper::Dumper $fe->get |
156 |
|
|
|
157 |
|
|
{ |
158 |
|
|
frequency => 426000000, # 426 Mhz |
159 |
|
|
inversion => 0, # INVERSION_OFF |
160 |
|
|
symbol_rate => 6900000, # 6.9 MB/s |
161 |
|
|
modulation => 3, # QAM_64 |
162 |
|
|
} |
163 |
|
|
|
164 |
|
|
=cut |
165 |
|
|
|
166 |
root |
1.1 |
sub parameters { _get ($_[0]{fd}, $_[0]{type}) } |
167 |
root |
1.5 |
sub get { _get ($_[0]{fd}, $_[0]{type}) } # unannounced alias |
168 |
root |
1.1 |
sub event { _event ($_[0]{fd}, $_[0]{type}) } |
169 |
|
|
|
170 |
root |
1.12 |
=item $ok = $fe->diseqc_reset_overload |
171 |
|
|
|
172 |
|
|
If the bus has been automatically powered off due to power overload, this |
173 |
|
|
call restores the power to the bus. The call requires read/write access |
174 |
|
|
to the device. This call has no effect if the device is manually powered |
175 |
|
|
off. Not all DVB adapters support this call. |
176 |
|
|
|
177 |
|
|
=item $ok = $fe->diseqc_voltage (13|18) |
178 |
|
|
|
179 |
|
|
Set the DiSEqC voltage to either 13 or 18 volts. |
180 |
|
|
|
181 |
|
|
=item $ok = $fe->diseqc_tone (1|0) |
182 |
|
|
|
183 |
|
|
Enables (1) or disables (0) the DiSEqC continuous 22khz tone generation. |
184 |
|
|
|
185 |
|
|
=item $ok = $fe->diseqc_send_burst (0|1) |
186 |
|
|
|
187 |
|
|
Sends a 22KHz tone burst of type SEC_MINI_A (0) or SEC_MINI_B (1). |
188 |
|
|
|
189 |
|
|
=item $ok = $fe->diseqc_cmd ($command) |
190 |
|
|
|
191 |
root |
1.14 |
Sends a DiSEqC command ($command is 3 to 6 bytes of binary data). |
192 |
root |
1.12 |
|
193 |
|
|
=item $reply = $fe->diseqc_reply ($timeout) |
194 |
|
|
|
195 |
root |
1.14 |
Receives a reply to a DiSEqC 2.0 command and returns it as a binary octet |
196 |
|
|
string 0..4 bytes in length (or C<undef> in the error case). |
197 |
root |
1.12 |
|
198 |
|
|
=cut |
199 |
|
|
|
200 |
root |
1.1 |
package Linux::DVB::Demux; |
201 |
|
|
|
202 |
|
|
@ISA = qw(Linux::DVB); |
203 |
|
|
|
204 |
root |
1.6 |
=back |
205 |
|
|
|
206 |
root |
1.1 |
=head1 Linux::DVB::Demux CLASS |
207 |
|
|
|
208 |
|
|
=head2 SYNOPSIS |
209 |
|
|
|
210 |
|
|
my $dmx = new Linux::DVB::Demux |
211 |
|
|
"/dev/dvb/adapter0/demux0"; |
212 |
|
|
|
213 |
|
|
$fe->fh; # filehandle |
214 |
|
|
$fe->fd; # fileno |
215 |
|
|
$fe->blocking (1); # non-blocking is default |
216 |
|
|
|
217 |
|
|
$dmx->buffer (16384); |
218 |
|
|
$dmx->sct_filter ($pid, "filter", "mask", $timeout=0, $flags=DMX_CHECK_CRC); |
219 |
|
|
$dmx->pes_filter ($pid, $input, $output, $type, $flags=0); |
220 |
|
|
$dmx->start; |
221 |
|
|
$dmx->stop; |
222 |
|
|
|
223 |
root |
1.6 |
=over 4 |
224 |
|
|
|
225 |
root |
1.1 |
=cut |
226 |
|
|
|
227 |
|
|
sub new { |
228 |
|
|
my ($class, $path) = @_; |
229 |
|
|
my $self = $class->SUPER::new ($path, &Fcntl::O_RDWR); |
230 |
|
|
|
231 |
|
|
$self; |
232 |
|
|
} |
233 |
|
|
|
234 |
|
|
sub start { _start ($_[0]{fd}) } |
235 |
|
|
sub stop { _stop ($_[0]{fd}) } |
236 |
|
|
|
237 |
|
|
sub sct_filter { _filter ($_[0]{fd}, @_[1, 2, 3, 4, 5]) } |
238 |
|
|
sub pes_filter { _pes_filter ($_[0]{fd}, @_[1, 2, 3, 4, 5]) } |
239 |
|
|
sub buffer { _buffer ($_[0]{fd}, $_[1]) } |
240 |
|
|
|
241 |
root |
1.2 |
package Linux::DVB::Decode; |
242 |
|
|
|
243 |
root |
1.6 |
=back |
244 |
|
|
|
245 |
|
|
=head1 Linux::DVB::Decode CLASS |
246 |
|
|
|
247 |
|
|
=head2 SYNOPSIS |
248 |
|
|
|
249 |
|
|
$si_decoded_hashref = Linux::DVB::Decode::si $section_data; |
250 |
|
|
|
251 |
|
|
=over 4 |
252 |
|
|
|
253 |
|
|
=cut |
254 |
|
|
|
255 |
|
|
=item $hashref = Linux::DVB::Decode::si $section_data |
256 |
|
|
|
257 |
|
|
Tries to parse the string inside C<$section_data> as an SI table and |
258 |
|
|
return it as a hash reference. Only the first SI table will be returned |
259 |
|
|
as hash reference, and the C<$section_data> will be modified in-place by |
260 |
|
|
removing the table data. |
261 |
|
|
|
262 |
|
|
The way to use this function is to append new data to your |
263 |
|
|
C<$section_data> and then call C<Linux::DVB::Decode::si> in a loop until |
264 |
|
|
it returns C<undef>. Please ntoe, however, that the Linux DVB API will |
265 |
|
|
return only one table at a time from sysread, so you can safely assume |
266 |
|
|
that every sysread will return exactly one (or zero in case of errors) SI |
267 |
|
|
table. |
268 |
|
|
|
269 |
|
|
Here is an example of what to expect: |
270 |
|
|
|
271 |
|
|
{ |
272 |
|
|
'segment_last_section_number' => 112, |
273 |
|
|
'table_id' => 81, |
274 |
|
|
'service_id' => 28129, |
275 |
|
|
'original_network_id' => 1, |
276 |
|
|
'section_syntax_indicator' => 1, |
277 |
|
|
'current_next_indicator' => 1, |
278 |
|
|
'events' => [ |
279 |
|
|
{ |
280 |
|
|
'running_status' => 0, |
281 |
|
|
'start_time_hms' => 2097152, |
282 |
|
|
'event_id' => 39505, |
283 |
|
|
'free_CA_mode' => 0, |
284 |
|
|
'start_time_mjd' => 53470, |
285 |
|
|
'descriptors' => [ |
286 |
|
|
{ |
287 |
|
|
'event_name' => 'Nachrichten', |
288 |
|
|
'text' => '', |
289 |
|
|
'ISO_639_language_code' => 'deu', |
290 |
|
|
'type' => 77 |
291 |
|
|
}, |
292 |
|
|
{ |
293 |
|
|
'programme_identification_label' => 337280, |
294 |
|
|
'type' => 105 |
295 |
|
|
}, |
296 |
|
|
{ |
297 |
|
|
'raw_data' => '22:0010.04#00', |
298 |
|
|
'type' => 130 |
299 |
|
|
} |
300 |
|
|
], |
301 |
|
|
'duration' => 1280 |
302 |
|
|
}, |
303 |
|
|
{ |
304 |
|
|
'running_status' => 0, |
305 |
|
|
'start_time_hms' => 2098432, |
306 |
|
|
'event_id' => 39506, |
307 |
|
|
'free_CA_mode' => 0, |
308 |
|
|
'start_time_mjd' => 53470, |
309 |
|
|
'descriptors' => [ |
310 |
|
|
{ |
311 |
|
|
'event_name' => 'SR 1 - Nachtwerk', |
312 |
|
|
'text' => '', |
313 |
|
|
'ISO_639_language_code' => 'deu', |
314 |
|
|
'type' => 77 |
315 |
|
|
}, |
316 |
|
|
{ |
317 |
|
|
'programme_identification_label' => 337285, |
318 |
|
|
'type' => 105 |
319 |
|
|
}, |
320 |
|
|
{ |
321 |
|
|
'raw_data' => '22:0510.04#00', |
322 |
|
|
'type' => 130 |
323 |
|
|
} |
324 |
|
|
], |
325 |
|
|
'duration' => 87296 |
326 |
|
|
} |
327 |
|
|
], |
328 |
|
|
'last_table_id' => 81, |
329 |
|
|
'section_number' => 112, |
330 |
|
|
'last_section_number' => 176, |
331 |
|
|
'version_number' => 31, |
332 |
|
|
'transport_stream_id' => 1101 |
333 |
|
|
} |
334 |
|
|
|
335 |
|
|
|
336 |
|
|
=item $text = Linux::DVB::Decode::text $data |
337 |
|
|
|
338 |
|
|
Converts text found in DVB si tables into perl text. Only iso-8859-1..-11 |
339 |
|
|
and UTF-16 is supported, other encodings (big5 etc. is not. Bug me if you |
340 |
|
|
need this). |
341 |
|
|
|
342 |
|
|
=cut |
343 |
root |
1.2 |
|
344 |
|
|
sub text($) { |
345 |
root |
1.6 |
use Encode; |
346 |
|
|
|
347 |
root |
1.2 |
for ($_[0]) { |
348 |
|
|
s/^([\x01-\x0b])// and $_ = decode sprintf ("iso-8859-%d", 4 + ord $1), $_; |
349 |
|
|
# 10 - pardon you??? |
350 |
|
|
s/^\x11// and $_ = decode "utf16-be", $_; |
351 |
|
|
# 12 ksc5601, DB |
352 |
|
|
# 13 db2312, DB |
353 |
|
|
# 14 big5(?), DB |
354 |
|
|
s/\x8a/\n/g; |
355 |
|
|
#s/([\x00-\x09\x0b-\x1f\x80-\x9f])/sprintf "{%02x}", ord $1/ge; |
356 |
|
|
s/([\x00-\x09\x0b-\x1f\x80-\x9f])//ge; |
357 |
|
|
} |
358 |
|
|
} |
359 |
|
|
|
360 |
root |
1.6 |
=item %Linux::DVB::Decode::nibble_to_genre |
361 |
|
|
|
362 |
|
|
A two-level hash mapping genre nibbles to genres, e.g. |
363 |
|
|
|
364 |
|
|
$Linux::DVB::Decode::nibble_to_genre{7}{6} |
365 |
|
|
=> 'film/cinema' |
366 |
|
|
|
367 |
|
|
=cut |
368 |
|
|
|
369 |
|
|
our %nibble_to_genre = ( |
370 |
|
|
0x1 => { |
371 |
root |
1.10 |
0x0 => 'Movie/Drama (general)', |
372 |
root |
1.6 |
0x1 => 'Movie - detective/thriller', |
373 |
|
|
0x2 => 'Movie - adventure/western/war', |
374 |
|
|
0x3 => 'Movie - science fiction/fantasy/horror', |
375 |
|
|
0x4 => 'Movie - comedy', |
376 |
|
|
0x5 => 'Movie - soap/melodrama/folkloric', |
377 |
|
|
0x6 => 'Movie - romance', |
378 |
|
|
0x7 => 'Movie - serious/classical/religious/historical movie/drama', |
379 |
|
|
0x8 => 'Movie - adult movie/drama', |
380 |
|
|
}, |
381 |
|
|
0x2 => { |
382 |
root |
1.10 |
0x0 => 'News/Current Affairs (general)', |
383 |
root |
1.6 |
0x1 => 'news/weather report', |
384 |
|
|
0x2 => 'news magazine', |
385 |
|
|
0x3 => 'documentary', |
386 |
|
|
0x4 => 'discussion/interview/debate', |
387 |
|
|
}, |
388 |
|
|
0x3 => { |
389 |
root |
1.10 |
0x0 => 'Show/Game Show (general)', |
390 |
root |
1.6 |
0x1 => 'game show/quiz/contest', |
391 |
|
|
0x2 => 'variety show', |
392 |
|
|
0x3 => 'talk show', |
393 |
|
|
}, |
394 |
|
|
0x4 => { |
395 |
root |
1.10 |
0x0 => 'Sports (general)', |
396 |
root |
1.6 |
0x1 => 'special events (Olympic Games, World Cup etc.)', |
397 |
|
|
0x2 => 'sports magazines', |
398 |
|
|
0x3 => 'football/soccer', |
399 |
|
|
0x4 => 'tennis/squash', |
400 |
|
|
0x5 => 'team sports (excluding football)', |
401 |
|
|
0x6 => 'athletics', |
402 |
|
|
0x7 => 'motor sport', |
403 |
|
|
0x8 => 'water sport', |
404 |
|
|
0x9 => 'winter sports', |
405 |
|
|
0xA => 'equestrian', |
406 |
|
|
0xB => 'martial sports', |
407 |
|
|
}, |
408 |
|
|
0x5 => { |
409 |
root |
1.10 |
0x0 => 'Childrens/Youth (general)', |
410 |
root |
1.6 |
0x1 => "pre-school children's programmes", |
411 |
|
|
0x2 => 'entertainment programmes for 6 to 14', |
412 |
|
|
0x3 => 'entertainment programmes for 10 to 16', |
413 |
|
|
0x4 => 'informational/educational/school programmes', |
414 |
|
|
0x5 => 'cartoons/puppets', |
415 |
|
|
}, |
416 |
|
|
0x6 => { |
417 |
root |
1.10 |
0x0 => 'Music/Ballet/Dance (general)', |
418 |
root |
1.6 |
0x1 => 'rock/pop', |
419 |
root |
1.10 |
0x2 => 'serious music or classical music', |
420 |
root |
1.6 |
0x3 => 'folk/traditional music', |
421 |
|
|
0x4 => 'jazz', |
422 |
|
|
0x5 => 'musical/opera', |
423 |
|
|
0x6 => 'ballet', |
424 |
|
|
}, |
425 |
|
|
0x7 => { |
426 |
root |
1.10 |
0x0 => 'Arts/Culture (without music, general)', |
427 |
root |
1.6 |
0x1 => 'performing arts', |
428 |
|
|
0x2 => 'fine arts', |
429 |
|
|
0x3 => 'religion', |
430 |
|
|
0x4 => 'popular culture/traditional arts', |
431 |
|
|
0x5 => 'literature', |
432 |
|
|
0x6 => 'film/cinema', |
433 |
|
|
0x7 => 'experimental film/video', |
434 |
|
|
0x8 => 'broadcasting/press', |
435 |
|
|
0x9 => 'new media', |
436 |
|
|
0xA => 'arts/culture magazines', |
437 |
|
|
0xB => 'fashion', |
438 |
|
|
}, |
439 |
|
|
0x8 => { |
440 |
root |
1.10 |
0x0 => 'Social/Policical/Economics (general)', |
441 |
root |
1.6 |
0x1 => 'magazines/reports/documentary', |
442 |
|
|
0x2 => 'economics/social advisory', |
443 |
|
|
0x3 => 'remarkable people', |
444 |
|
|
}, |
445 |
|
|
0x9 => { |
446 |
root |
1.10 |
0x0 => 'Education/Science/Factual (general)', |
447 |
root |
1.6 |
0x1 => 'nature/animals/environment', |
448 |
|
|
0x2 => 'technology/natural sciences', |
449 |
|
|
0x3 => 'medicine/physiology/psychology', |
450 |
|
|
0x4 => 'foreign countries/expeditions', |
451 |
|
|
0x5 => 'social/spiritual sciences', |
452 |
|
|
0x6 => 'further education', |
453 |
|
|
0x7 => 'languages', |
454 |
|
|
}, |
455 |
|
|
0xA => { |
456 |
root |
1.10 |
0x0 => 'Leisure/Hobbies (general)', |
457 |
root |
1.6 |
0x1 => 'tourism/travel', |
458 |
|
|
0x2 => 'handicraft', |
459 |
|
|
0x3 => 'motoring', |
460 |
|
|
0x4 => 'fitness & health', |
461 |
|
|
0x5 => 'cooking', |
462 |
|
|
0x6 => 'advertizement/shopping', |
463 |
|
|
0x7 => 'gardening', |
464 |
|
|
}, |
465 |
|
|
0xB => { |
466 |
root |
1.10 |
0x0 => '(original language)', |
467 |
|
|
0x1 => '(black & white)', |
468 |
|
|
0x2 => '(unpublished)', |
469 |
|
|
0x3 => '(live broadcast)', |
470 |
root |
1.6 |
}, |
471 |
|
|
); |
472 |
|
|
|
473 |
root |
1.8 |
=item ($sec,$min,$hour) = Linux::DVB::Decode::time $hms |
474 |
|
|
|
475 |
|
|
=item ($mday,$mon,$year) = Linux::DVB::Decode::date $mjd |
476 |
|
|
|
477 |
|
|
=item ($sec,$min,$hour,$mday,$mon,$year) = Linux::DVB::Decode::datetime $mjd, $hms |
478 |
|
|
|
479 |
|
|
=item $sec = Linux::DVB::Decode::time_linear $hms |
480 |
|
|
|
481 |
|
|
=item $sec = Linux::DVB::Decode::datetime_linear $mjd, $hms |
482 |
root |
1.6 |
|
483 |
|
|
Break down a "DVB time" (modified julian date + bcd encoded seconds) into |
484 |
root |
1.8 |
it's components (non-C<_linear>) or into a seconds count (C<_linear> |
485 |
|
|
variants) since the epoch (C<datetime_linear>) or the start of the day |
486 |
|
|
(C<time_linear>). |
487 |
|
|
|
488 |
root |
1.9 |
The format of the returns value of the date and datetime functions is |
489 |
|
|
I<not> compatible with C<Time::Local>. Use the C<_linear> functions |
490 |
|
|
instead. |
491 |
|
|
|
492 |
root |
1.8 |
Example: |
493 |
|
|
|
494 |
|
|
my $time = Linux::DVB::Decode::datetime_linear $mjd, $hms |
495 |
|
|
printf "Starts at %s\n", |
496 |
|
|
POSIX::strftime "%Y-%m-%d %H:%M:%S", |
497 |
|
|
localtime $time; |
498 |
root |
1.6 |
|
499 |
|
|
=cut |
500 |
|
|
|
501 |
root |
1.8 |
sub time($) { |
502 |
|
|
my ($time) = @_; |
503 |
|
|
|
504 |
|
|
# Time is in UTC, 24 bit, every nibble one digit in BCD from right to left |
505 |
|
|
my $hour = sprintf "%02x", ($time >> 16) & 0xFF; |
506 |
|
|
my $minute = sprintf "%02x", ($time >> 8) & 0xFF; |
507 |
|
|
my $second = sprintf "%02x", ($time ) & 0xFF; |
508 |
|
|
|
509 |
|
|
($second, $minute, $hour) |
510 |
|
|
} |
511 |
|
|
|
512 |
|
|
sub date($) { |
513 |
|
|
my ($mjd) = @_; |
514 |
root |
1.6 |
|
515 |
|
|
# Date is given in Modified Julian Date |
516 |
|
|
# Decoding routines taken from ANNEX C, ETSI EN 300 468 (DVB SI) |
517 |
root |
1.9 |
my $y_ = int (($mjd - 15078.2) / 365.25); |
518 |
root |
1.6 |
my $m_ = int (($mjd - 14956.1 - int ($y_ * 365.25)) / 30.6001); |
519 |
|
|
my $day = $mjd - 14956 - int ($y_ * 365.25) - int ($m_ * 30.6001); |
520 |
|
|
my $k = $m_ == 14 or $m_ == 15 ? 1 : 0; |
521 |
|
|
my $year = $y_ + $k + 1900; |
522 |
|
|
my $month = $m_ - 1 - $k * 12; |
523 |
|
|
|
524 |
root |
1.8 |
($day, $month, $year) |
525 |
|
|
} |
526 |
|
|
|
527 |
|
|
sub datetime($$) { |
528 |
|
|
(Linux::DVB::Decode::time $_[1], date $_[0]) |
529 |
|
|
} |
530 |
|
|
|
531 |
|
|
sub time_linear($) { |
532 |
|
|
my ($s, $m, $h) = Linux::DVB::Decode::time $_[0]; |
533 |
|
|
|
534 |
|
|
(($h * 60) + $m * 60) + $s |
535 |
|
|
} |
536 |
root |
1.6 |
|
537 |
root |
1.8 |
sub datetime_linear($$) { |
538 |
root |
1.9 |
my ($sec, $min, $hour, $mday, $mon, $year) = |
539 |
|
|
Linux::DVB::Decode::datetime $_[0], $_[1]; |
540 |
|
|
|
541 |
root |
1.8 |
require Time::Local; |
542 |
root |
1.9 |
Time::Local::timegm ($sec, $min, $hour, $mday, $mon - 1, $year) |
543 |
root |
1.6 |
} |
544 |
|
|
|
545 |
|
|
=back |
546 |
root |
1.1 |
|
547 |
root |
1.6 |
=head1 AUTHORS |
548 |
root |
1.1 |
|
549 |
root |
1.6 |
Marc Lehmann <schmorp@schmorp.de>, http://home.schmorp.de/ |
550 |
|
|
Magnus Schmidt, eMail at http://www.27b-6.de/email.php |
551 |
root |
1.1 |
|
552 |
|
|
=cut |
553 |
|
|
|
554 |
root |
1.6 |
1 |