typos and additional explanations

README

@@ -63,13 +63,13 @@ output goes into *dest.
     strm.next_in = (unsigned char *)source;
 
     /* length of input in bytes */
-    strm.avail_in = source_length * 4;
+    strm.avail_in = source_length * sizeof(int32_t);
 
     /* pointer to output buffer */
-    strm.avail_out = dest;
+    strm.next_out = dest;
 
     /* length of output buffer in bytes */
-    strm.next_out = dest_lenth;
+    strm.avail_out = dest_length;
 
     /* initialize encoding */
     if (aec_encode_init(&strm) != AEC_OK)
@@ -91,8 +91,8 @@ less overhead but can be less efficient if entropy changes across the
 block.
 
 rsi sets the reference sample interval. A large RSI will improve
-performance and efficiency. It will also increase memory requiremens
-since internal buffering is based on RSI size. Smaller RSI may be
+performance and efficiency. It will also increase memory requirements
+since internal buffering is based on RSI size. A smaller RSI may be
 desirable in situations where each RSI will be packetized and possible
 error propagation has to be minimized (e.g. on board a spacecraft[2]).
 
@@ -139,6 +139,14 @@ last call to aec_encode() must set AEC_FLUSH to drain all
 output. aec.c is an example of streaming usage of encoding and
 decoding.
 
+Output:
+
+Encoded data will be written to the buffer submitted with
+next_out. The length of the compressed data is total_out.
+
+See libaec.h for a detailed description of all relevant structure
+members and constants.
+
 
 **********************************************************************
  Decoding
@@ -163,7 +171,7 @@ and output is reversed.
     strm.next_in = source;
     strm.avail_in = source_length;
     strm.next_out = (unsigned char *)dest;
-    strm.avail_out = dest_lenth * 4;
+    strm.avail_out = dest_lenth * sizeof(int32_t);
     if (aec_decode_init(&strm) != AEC_OK)
         return 1;
     if (aec_decode(&strm, AEC_FLUSH) != AEC_OK)
@@ -177,6 +185,10 @@ encoding. libaec does not store these parameters in the coded stream
 so it is up to the calling program to keep the correct parameters
 between encoding and decoding.
 
+The actual values of coding parameters are in fact only relevant for
+efficiency and performance. Data integrity only depends on consistency
+of the parameters.
+
 
 **********************************************************************
  References