ff_h264_decode_rbsp_trailing 7472 libavcodec/h264.c         bit_length= !dst_length ? 0 : (8*dst_length - ff_h264_decode_rbsp_trailing(h, ptr + dst_length - 1));
ff_h264_decode_rbsp_trailing  563 libavcodec/h264.h int ff_h264_decode_rbsp_trailing(H264Context *h, const uint8_t *src);