Rsi block access

Efficient data access by accessing individual RSIs.

include/libaec.h.in

@@ -126,6 +126,7 @@ struct aec_stream {
 #define AEC_STREAM_ERROR (-2)
 #define AEC_DATA_ERROR (-3)
 #define AEC_MEM_ERROR (-4)
+#define AEC_RSI_OFFSETS_ERROR (-5)
 
 /************************/
 /* Options for flushing */
@@ -150,16 +151,27 @@ struct aec_stream {
 LIBAEC_DLL_EXPORTED int aec_encode_init(struct aec_stream *strm);
 LIBAEC_DLL_EXPORTED int aec_encode(struct aec_stream *strm, int flush);
 LIBAEC_DLL_EXPORTED int aec_encode_end(struct aec_stream *strm);
+LIBAEC_DLL_EXPORTED int aec_encode_enable_offsets(struct aec_stream *strm);
+LIBAEC_DLL_EXPORTED int aec_encode_count_offsets(struct aec_stream *strm, size_t *count);
+LIBAEC_DLL_EXPORTED int aec_encode_get_offsets(struct aec_stream *strm, size_t *offsets, size_t offsets_count);
 
 LIBAEC_DLL_EXPORTED int aec_decode_init(struct aec_stream *strm);
 LIBAEC_DLL_EXPORTED int aec_decode(struct aec_stream *strm, int flush);
 LIBAEC_DLL_EXPORTED int aec_decode_end(struct aec_stream *strm);
+LIBAEC_DLL_EXPORTED int aec_decode_enable_offsets(struct aec_stream *strm);
+LIBAEC_DLL_EXPORTED int aec_decode_count_offsets(struct aec_stream *strm, size_t *count);
+LIBAEC_DLL_EXPORTED int aec_decode_get_offsets(struct aec_stream *strm, size_t *offsets, size_t offsets_count);
 
 /***************************************************************/
 /* Utility functions for encoding or decoding a memory buffer. */
 /***************************************************************/
 LIBAEC_DLL_EXPORTED int aec_buffer_encode(struct aec_stream *strm);
 LIBAEC_DLL_EXPORTED int aec_buffer_decode(struct aec_stream *strm);
+LIBAEC_DLL_EXPORTED int aec_buffer_seek(struct aec_stream *strm,
+                                        size_t byte_offset,
+                                        unsigned char bit_offset);
+LIBAEC_DLL_EXPORTED int aec_read(struct aec_stream *strm, const size_t *offsets, size_t offsets_size, unsigned char* buf, size_t count, size_t offset);
+LIBAEC_DLL_EXPORTED int aec_rsi_at(struct aec_stream *strm, const size_t *offsets, size_t offsets_size, size_t idx);
 
 #ifdef __cplusplus
 }