src/demux: functions dvbpsi_*DemuxSubDecoder() are no longer implemented, but are merely empty stubs

The function dvbpsi_decoder_psi_section_add() never set p_decoder::i_last_section_number when
adding a new section at the end of the list. This was left to the decoder implementations. However
the correct action would have been to set p_decoder::i_last_section_number in dvbpsi_decoder_psi_section_add().

The EIT tables were output incomplete as the
first sections were always dropped.

(2 sections, last_section == 1)
Ex: section 1
    section 0
    secton  1

IsCompleteEIT is always true in first condition in that case.
It is also always true if section is N/N.
first_section > -1 && section_number == last_section because
it has just been added.

Doing the check before effectively adding the section
allows a correct evaluation against current section.
Signed-off-by: Jean-Paul Saman <jpsaman@videolan.org>

Using the current date for capture time makes no sense when the source is a file.

MPEG TS streams with multiple programs got squashed when printing the summary.
Since it did not handle the correct PMT it also failed to properly calculate PCR duration.

Handling the PMT explicitly allowed calculating the correct PCR duration and bitrate for all
streams in a PMT.

Rework checking section boundaries.

Check the needed bytes and available data bytes in dvbpsi_sis_cmd_splice_insert_decode().

Signed-off-by: Jean-Paul Saman <jpsaman@videolan.org>

Signed-off-by: Jean-Paul Saman <jpsaman@videolan.org>

Signed-off-by: Jean-Paul Saman <jpsaman@videolan.org>

Signed-off-by: Jean-Paul Saman <jpsaman@videolan.org>

Signed-off-by: Jean-Paul Saman <jpsaman@videolan.org>

Signed-off-by: Jean-Paul Saman <jpsaman@videolan.org>

Signed-off-by: Jean-Paul Saman <jpsaman@videolan.org>

Signed-off-by: Jean-Paul Saman <jpsaman@videolan.org>

Signed-off-by: Jean-Paul Saman <jpsaman@videolan.org>

Signed-off-by: Jean-Paul Saman <jpsaman@videolan.org>

The splice_insert command decoder is implemented in function dvbpsi_sis_cmd_splice_insert_decode().

Rename struct dvbpsi_sis_component_utc_splice_time_t to dvbpsi_sis_component_t and
also rename dvbpsi_sis_splice_event_t::p_splice_utc_time to dvbpsi_sis_splice_event_t::p_component.