Now we no longer update times and statistics in the control loop
(where it was kinda pointless). If there is no wake-up from the ES
output, then the input thread only needs to wait for control requests
- which means it can sleep without time-out.

In practice, that corresponds to the input thread being paused and
not buffering (buffering while paused is possible due to seek).

Before the next patch, the deadline should always be zero or positive.
(Also note that deadlines, unlike time-outs are absolute timestamps.)

The values will typically not change while waiting for control requests
and not processing the demux and outputs. Even if the values do change
(e.g. due to a seek request), the demux needs to be called to recompute
the updated values: see demux_Control() calls in MainLoopStatistics().

Note that the intrinsic computational savings from this commit are
probably negligible. The interesting aspect is the removal of one
wake-up source within the input control loop. This commit does not
remove nor add any wake-up however.

This is always VLC_SUCCESS anyway.

This is pending fixing or removal decision.

Consistent with historical semantics, the destination format will
be incomplete but valid if the copy fails. It must be cleared with
es_format_Clean() even in case of error (as before).

Also add a few assertions against invalid formats.

This is always VLC_SUCCESS, or a forwarded value. Ultimately, the
value was (rightfully) ignored by the stream output core.

Example:
 #cycle{duration=20m,
        dst=std{mux=ts,access=file,dst=sport.ts},   duration=5m},
        dst=std{mux=ts,access=file,dst=weather.ts}, duration=5m}

Skips 20 minutes, then records 5 minutes to sport.ts, then 5 more
minutes to weather.ts and restarts.

"duration" specifies the duration of the previous phase
"offset"   specifies the offset at which the previous phase ends
           and the next phase begins
           (mutually exclusive with duration)
"dst"      specifies the stream output chain for the phase
           (if missing, the phase is skipped/discarded)

Durations and offsets are so far expressed as an integer, optionally
followed by a unit: w=week, d=day, h=hour, m=minute, s=second. Second
is the default.

Currently only the decoding time stamp can be used as a reference, but
adding local or UTC clocks should be relatively easy.

ES synchronization and reference frames management is left for
further study.

refs issues/TS/dreambox.ts
Some Dreambox produced streams have patched PAT
setting all programs pid to the recorded's.

Reject that PAT and guess content from probing then.

refs #6175
If sdt appears prior pmt/es, the group from first
SET_GROUP_META call overrides default selection.

Fix Start called after a Stop (When audio track changes).

- JNIThread won't kill itself anymore: In case of error, it will wait for the
  Stop cmd.
- Handle AudioTrack exceptions: don't call audiotrack methods if an exception
  occurred.
Signed-off-by: Jean-Baptiste Kempf <jb@videolan.org>

Signed-off-by: Jean-Baptiste Kempf <jb@videolan.org>

Slightly better version with the right macros to access the semantic
context master.
Signed-off-by: Jean-Baptiste Kempf <jb@videolan.org>

Signed-off-by: Jean-Baptiste Kempf <jb@videolan.org>

It's useless for us and annoying on Windows

Signed-off-by: Jean-Baptiste Kempf <jb@videolan.org>