av_buffer_pool_buffer_get_opaque  277 libavdevice/xcbgrab.c     segment = (xcb_shm_seg_t)av_buffer_pool_buffer_get_opaque(buf);
av_buffer_pool_buffer_get_opaque  299 libavutil/buffer.h void *av_buffer_pool_buffer_get_opaque(AVBufferRef *ref);