This commit improve MediaCodec performances and remove polling every 10 msecs
when DecodeCommon is waiting for an input or an output buffer.

One new thread is used for output: once an input buffer is queued, this thread
will wait indefinitely for a MediaCodec output buffer (this can be cancelled by
a flush).  This buffer will be queued to the video or audio output via
decoder_QueueVideo or decoder_QueueAudio.

This thread, and pf_decode call are locked by the same mutex. Only
mc->dequeue_in/mc->dequeue_out are not locked since these functions can block.

Fixes #15079

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

Fixes late frames in sparse video streams (BluRay menus)
Signed-off-by: Jean-Baptiste Kempf <jb@videolan.org>

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

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

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

Fixes missing overlay when Demux() is not called enough often.
Signed-off-by: Jean-Baptiste Kempf <jb@videolan.org>

Avoids logging these as unhandled events.
Signed-off-by: Jean-Baptiste Kempf <jb@videolan.org>

Fix #16075
Signed-off-by: Andrea Giudiceandrea <andreaerdna@libero.it>
Signed-off-by: Jean-Baptiste Kempf <jb@videolan.org>

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

We don´t want to discard decoded data if seeking during prefoll then
the timestamps restart from lower values.

This fixes a possible deadlock when seeking paused at the end of the video.
Indeed, in that case, prerolling won't end and the decoder won't be flushed if
we seek at the end again.

Conflicts:
    src/input/decoder.c
Signed-off-by: Rémi Denis-Courmont <remi@remlab.net>

This function allow asynchronous decoders to queue a subtitle to the video
output. Decoders that use this function should return NULL in pf_decode_sub
callback.
Signed-off-by: Rémi Denis-Courmont <remi@remlab.net>

This function allow asynchronous decoders to queue an audio block to the audio
output. Decoders that use this function should return NULL in pf_decode_audio
callback.
Signed-off-by: Rémi Denis-Courmont <remi@remlab.net>

This function allow asynchronous decoders to queue a picture to the video
output. Decoders that use this function should return NULL in pf_decode_video
callback.
Signed-off-by: Rémi Denis-Courmont <remi@remlab.net>

This variable will be acceded by other threads via future decoder queue
functions
Signed-off-by: Rémi Denis-Courmont <remi@remlab.net>

Only the SPS was detected.

inputChangedHandler only reads from the current MIM input, which isn't
set until the next playlist callback is received.
This actively probes the current input, sets it, and inform potential
listeners
refs #14162

This is unoptimal but could be improved using C++11 (or memory barriers
for double check locking)
fixes #14885

hvc1 is reserved for streams with VCL only

bitstream reader will always return 0 if no bytes