HollowCore H.264 decoder

This is a completely stripped down version of the Android OpenCORE multimedia framework so that only the software H.264 decoder remains. It is an attempt to make it easier to integrate an H.264 decoder with a C/C++ application. To that end, all externally needed header files are in the /include directory and the code produces one small shared library.

Currently, the project builds using qmake. To build, run:

qmake hollowcore.pro make

Usage

See include/avc_h264/avcdec_api.h for the main calls to the decoder. The general flow in your application is the following:

1. Read data from a file or stream
2. Parse that data into NAL units using PVAVCAnnexBGetNALUnit() or other mechanism
3. Check the NAL type and call PVAVCDecodeSlice for slices and IDR, PVAVCDecSeqParamSet for SPS, and PVAVCDecPicParamSet for PPS NALs
4. Call PVAVCDecGetOutput to get the decoded frames out

Limitations

The decoder has the same limitations as the original Android OpenCore decoder. The one that most often affects me is the lack of support for CABAC entropy encoding. SEI metadata support is also minimal.