MediaPlayer: fix a memory leak in SRT character set decoding

MediaPlayer: detect and convert encoding in subtitles.

The SRT file format unfortunately does not specify a text encoding (in
fact, there isn't even really a specification for it). Just loading the
bytes and assuming UTF-8 does not work so well, so we now try to detect
the encoding from the first line of text found.

Fixes #9668

(sometimes watching a movie is all an adventure!)

MediaPlayer: some 64 bit fixes

Made the SRT parser a bit less strict.

* This allows to parse some SRTs that previously failed.
* Use the more expressive BString::IsEmpty() instead of Length() > 0.

* Added basic support for SRT subtitle files. It only works
if the SRT file is placed alongside the current playlist
item under the same name (sans extension). The name of the
language is taken from the file which needs to be separated
by a dot (should be improved).
* Instead of the black outline, subtitles have a nice drop
shadow now, which is easier on the eyes somehow.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@38827 a95241bf-73f2-0310-859d-f6bbb57e9c96

MediaPlayer: some 64 bit fixes

Made the SRT parser a bit less strict.

* This allows to parse some SRTs that previously failed.
* Use the more expressive BString::IsEmpty() instead of Length() > 0.

* Added basic support for SRT subtitle files. It only works
if the SRT file is placed alongside the current playlist
item under the same name (sans extension). The name of the
language is taken from the file which needs to be separated
by a dot (should be improved).
* Instead of the black outline, subtitles have a nice drop
shadow now, which is easier on the eyes somehow.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@38827 a95241bf-73f2-0310-859d-f6bbb57e9c96