Merge pull request #212 from google/spec_fixes

Some spec fixes

docs/spec/core.functions.md

@@ -15,3 +15,42 @@ void DecodeVarint(out_val) {
 }
 ~~~~~
 {:.draco-syntax }
+
+
+### mem_get_le16
+
+~~~~~
+uint32_t mem_get_le16(mem) {
+  val = mem[1] << 8;
+  val |= mem[0];
+  return val;
+}
+~~~~~
+{:.draco-syntax }
+
+
+### mem_get_le24
+
+~~~~~
+uint32_t mem_get_le24(mem) {
+  val = mem[2] << 16;
+  val |= mem[1] << 8;
+  val |= mem[0];
+  return val;
+}
+~~~~~
+{:.draco-syntax }
+
+
+### mem_get_le32
+
+~~~~~
+uint32_t mem_get_le32(mem) {
+  val = mem[3] << 24;
+  val |= mem[2] << 16;
+  val |= mem[1] << 8;
+  val |= mem[0];
+  return val;
+}
+~~~~~
+{:.draco-syntax }

docs/spec/metadata.decoder.md

@@ -4,7 +4,7 @@
 
 ~~~~~
 void DecodeMetadata() {
-  ParseMetedataCount();
+  ParseMetadataCount();
 
   for (i = 0; i < num_att_metadata; ++i) {
     ParseAttributeMetadataId(i);
@@ -16,10 +16,10 @@ void DecodeMetadata() {
 {:.draco-syntax}
 
 
-### ParseMetedataCount()
+### ParseMetadataCount()
 
 ~~~~~
-void ParseMetedataCount() {
+void ParseMetadataCount() {
   num_att_metadata                                                                    varUI32
 }
 ~~~~~

docs/spec/prediction.texcoords.decoder.md

@@ -42,8 +42,8 @@ void GetPositionForEntryId(entry_id, pos) {
 ~~~~~
 void GetTexCoordForEntryId(entry_id, data, tex_coords) {
   data_offset = entry_id * kTexCoordsNumComponents;
-  tex_coords->push_back(data[data_offset]);
-  tex_coords->push_back(data[data_offset + 1]);
+  tex_coords.push_back(data[data_offset]);
+  tex_coords.push_back(data[data_offset + 1]);
 }
 ~~~~~
 {:.draco-syntax}

docs/spec/rans.decoding.md

@@ -61,7 +61,6 @@ void DecodeTaggedSymbols(num_values, num_components, out_values) {
   rans_precision = 1 << rans_precision_bits_t;
   l_rans_base = rans_precision * 4;
   num_symbols_                                                                        varUI32
-  ReadVarUI32(&num_symbols_);
   BuildSymbolTables(num_symbols_, lut_table_, probability_table_);
   bytes_encoded                                                                       varUI64
   encoded_data                                                                        UI8[size]
@@ -220,18 +219,18 @@ void fetch_sym(sym, rem, lut_table_, probability_table_) {
 ~~~~~
 void RabsDescRead(ans, p0, out_val) {
   p = rabs_ans_p8_precision - p0;
-  if (ans->state < rabs_l_base) {
-    ans->state = ans->state * IO_BASE + ans->buf[--ans->buf_offset];
+  if (ans.state < rabs_l_base) {
+    ans.state = ans.state * IO_BASE + ans.buf[--ans.buf_offset];
   }
-  x = ans->state;
+  x = ans.state;
   quot = x / rabs_ans_p8_precision;
   rem = x % rabs_ans_p8_precision;
   xn = quot * p;
   val = rem < p;
   if (val) {
-    ans->state = xn + rem;
+    ans.state = xn + rem;
   } else {
-    ans->state = x - xn - p;
+    ans.state = x - xn - p;
   }
   out_val = val;
 }

docs/spec/variable.descriptions.md

@@ -6,6 +6,9 @@
   * 0: MESH_SEQUENTIAL_ENCODING
   * 1: MESH_EDGEBREAKER_ENCODING
 
+* Metadata constants
+  * 32768: METADATA_FLAG_MASK
+
 * Sequential attribute encoding methods
   * 0: SEQUENTIAL_ATTRIBUTE_ENCODER_GENERIC
   * 1: SEQUENTIAL_ATTRIBUTE_ENCODER_INTEGER