- virtual void read_from (const Buffer& src, framecnt_t len, framecnt_t dst_offset = 0, framecnt_t src_offset = 0) = 0;
- virtual void merge_from (const Buffer& src, framecnt_t len, framecnt_t dst_offset = 0, framecnt_t src_offset = 0) = 0;
+ virtual void read_from (const Buffer& src, framecnt_t len, frameoffset_t dst_offset = 0, frameoffset_t src_offset = 0) = 0;
+ virtual void merge_from (const Buffer& src, framecnt_t len, frameoffset_t dst_offset = 0, frameoffset_t src_offset = 0) = 0;