Inserting a new PSI section did not take into account that the previous
pointer could be none existing. It was equal to the start of the list,
which resulted in a loop.

(Fixes commit: 57c6cd63)

The member p_decoder->ap_sections[256] is replaced by p_decoder->p_sections.
This is a pointer to a linked list, which makes the dvbpsi_decoder_section_chain()
function obsolete.

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 dvbpsi_bat_sections_decode method parsing index was wrongly incremented
dvbpsi_AddSectionBAT method did not correctly check for memory allocation.
Signed-off-by: Jean-Paul Saman <jpsaman@videolan.org>

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

The function arguments and its order have changed during cleaning up.
This breaks the old API and a rename of functions was needed to properly
mark the older API as deprecated.

- rename p_dvbpsi->p_private to p_dvbpsi->p_decoder
- use dvbpsi_NewDecoder() where possible

The function reimplemented the CRC check function which is available
in src/psi.c

Adding a descriptor to the end of the descriptor list has now been
moved to a utility function implemented in src/descriptor.c

Add a PSI section to dvbpsi_decoder_t::ap_sections[] array. The function returns
true when it overwrites an earlier entry and false otherwise.

The function dvbpsi_ChainSectionsDecoder() turns the dvbpsi_decoder_t::ap_sections[] array
into a linked list.

The table decoder check for all sections received in the same manner, this
is now abstracted away in the dvbpsi_SectionsCompleteDecoder() function.

Add a function to reinit a decoder as is needed by PSI decoders.

The struct members ::p_current_valid, ::i_last_section_number and
::ap_sections[] array are used by all PSI section decoders. They are
moved to DVBPSI_DECODER_COMMON.

Implemented a function fifo_size() that returns the current size of the fifo.
The dvbinfo example program uses fifo_size() to detect if the total size of
buffers inside the fifo exceeds a certain threshold. The threshold is currently
defined at compile time.