Version 0.15.0

• Add new decoder "hap" to decode Hap1, Hap5, HapY and HapM videos into compressed gpu textures(BC1~4). Only desktop platforms are enabled. It's preferred over "FFmpeg" if Player.setDecoders() is not called by user. See https://github.com/wang-bin/mdk-sdk/wiki/Decoders#hap
• Support gpu accelerated Hap rendering via decoder name "hap".
• Support backward seek by frame. pos in seek(pos, SeekFlag::FromNow|SeekFlag::Frame) can be negative, -1 means go back 1 frame.
• Add SeekFlag::InCache to support seeking in cached data to improve online video seeking. Target position must be in range (position(), position() + Player.buffered()].
• VT Supports mpeg2video
• VideoFrame.save() can save original data. Also select closest format if save as an image.
• Improve rendering RGB with X/0(unused alpha channel) formats
• Fix position() is not correctly when seeking by frame.
• Fix playback may stop unexpected, and seeking is slow if seek near EOF
• Fix wrong playback speed if resume from paused state on apple platforms
• Fix empty png snapshot
• Fix snapshot error on OpenGL ES2
• Fix A-B loop may block if too many players
• Fix wrong Player.position() and audio timestamp if playbackRate() != 1
• Fix prepare() callback not called or called many times
• Fix shader compiling affected by locale and may crash, e.g. LC_ALL == de_CH
• FFmpeg:
  • Improve avdevice playback
  • Supports ffmpeg 5.1+