doc: linking issue on linux
Merge branch 'dev'
add missing swr api. build with old swr
remove timeout macro. set callback when parsing stream
init and deinit ffmpeg only once. issue 57
caputre should only supply a default capture configuration
resume correctly in next frame mode. #issue 56
add AudioFormat class

ref QtMultiMedia
add missing operator= for AudioFormat
use AudioFormat and fix speed bug
add channel layout in AudioFormat. use FFmpeg's values
non-linear speed control
mistake
add speed api in AVPlayer.
speed control for video without audio
translations. player example add tooltips
player: speed indicator
QTAV_HAVE() macro works for VC

see wtf/Platform.h
TODO: why defined() does not work
use dllimport to enable data export
let xxx id be extern and export/import for windows

dllimport/export is required for windows.
Ids can be declared in header and define only once(in source)