ffplay: remove manual bug option handling code

It is supported as a codec option, and those are already parsed.

ffplay: remove manual bug option handling code

It is supported as a codec option, and those are already parsed.

Merge commit 'e58a140cf91d1a9cdfa3115d73c923dab0e9e7dc'

* commit 'e58a140cf91d1a9cdfa3115d73c923dab0e9e7dc':
  avplay: Always free opts

Conflicts:
ffplay.c

Merge commit 'cf83c0173917a44b89a25ea2b435429bbf9ee767'

* commit 'cf83c0173917a44b89a25ea2b435429bbf9ee767':
  avplay: Always free find_stream_info options

Conflicts:
ffplay.c

ffplay: dont leave swresampler in half initialized state

On init failure, let's just free it, so next time it will be recreated from
start.

Also fixes Coverity CID 1241515.

ffplay: Separate AVFrame from AVSubtitle

This is more robust and should avoid false positives in coverity
That is if the type is ever mixed up, after this patch that would
just be a null pointer dereference instead of a random possibly
out of array access

ffplay: use av_codec_get_pkt_timebase()

ffplay: move pts calculating code to generic decoder

ffplay: factorize decoder functions to generic decoder

ffplay: use frame queue to determine last used pos

ffplay: factorize frame queue operations

Create a generic frame and a frame queue struct to handle video picture queues
and subtitle picture queues with common code. Also add the possibility to queue
AVFrames, however at the moment we only use SDL_Overlay buffers for video and
AVSubtitles for subtitles.