tree c0d8bc5508d98098b2eb04689f31b91ac64e11a2
parent 35f5bfc2a1ca84bbb182da29c76b176d239098fe
author Joe Drago <jdrago@netflix.com> 1569527210 -0700
committer Joe Drago <jdrago@netflix.com> 1569527210 -0700

Keyframe info and Nth image support

Added:
- stss box parsing for keyframe information
- avifBool avifDecoderIsKeyframe(avifDecoder * decoder, uint32_t frameIndex);
- uint32_t avifDecoderNearestKeyframe(avifDecoder * decoder, uint32_t frameIndex);
- avifResult avifDecoderNthImage(avifDecoder * decoder, uint32_t frameIndex);
- aviffuzz prints keyframe information as it repeatedly decodes

Changed:
- internally renamed codec function "decode" to "open", as that's all it does
- dav1d codec's open function no longer does an initial unnecessary feed
- avifCodecDecodeInput now stores an array of avifSample which know if they're keyframes
- moved codec flushing code into avifDecoderFlush() so it is available to avifDecoderNthImage
- ptsInTimescales is now calculated independently of frame decode order