SetChunk          927 3rdparty/libwebp/demux/demux.c   return SetChunk(fourcc, chunk_num, iter);
SetChunk          934 3rdparty/libwebp/demux/demux.c     return SetChunk(fourcc, iter->chunk_num + 1, iter);
SetChunk          943 3rdparty/libwebp/demux/demux.c     return SetChunk(fourcc, iter->chunk_num - 1, iter);