Exposing methods DS_CreateModelFromBuffer and DS_EnableExternalScorerFromBuffer

Author: bernardohenz

doc/BUILDING.rst

@@ -73,7 +73,7 @@ You can now use Bazel to build the main DeepSpeech library, ``libdeepspeech.so``
 
 .. code-block::
 
-   bazel build --workspace_status_command="bash native_client/bazel_workspace_status_cmd.sh" --config=monolithic -c opt --copt=-O3 --copt="-D_GLIBCXX_USE_CXX11_ABI=1" --copt=-fvisibility=hidden //native_client:libdeepspeech.so
+   bazel build --workspace_status_command="bash native_client/bazel_workspace_status_cmd.sh" --config=monolithic -c opt --copt=-O3 --copt="-D_GLIBCXX_USE_CXX11_ABI=0" --copt=-fvisibility=hidden //native_client:libdeepspeech.so
 
 The generated binaries will be saved to ``bazel-bin/native_client/``.
 
@@ -87,7 +87,7 @@ Using the example from above you can build the library and that binary at the sa
 
 .. code-block::
 
-   bazel build --workspace_status_command="bash native_client/bazel_workspace_status_cmd.sh" --config=monolithic -c opt --copt=-O3 --copt="-D_GLIBCXX_USE_CXX11_ABI=1" --copt=-fvisibility=hidden //native_client:libdeepspeech.so //native_client:generate_scorer_package
+   bazel build --workspace_status_command="bash native_client/bazel_workspace_status_cmd.sh" --config=monolithic -c opt --copt=-O3 --copt="-D_GLIBCXX_USE_CXX11_ABI=0" --copt=-fvisibility=hidden //native_client:libdeepspeech.so //native_client:generate_scorer_package
 
 The generated binaries will be saved to ``bazel-bin/native_client/``.
 

native_client/client.cc

@@ -424,7 +424,7 @@ main(int argc, char **argv)
     std::ifstream is_model( model, std::ios::binary );
     std::stringstream buffer_model;
     buffer_model << is_model.rdbuf();
-    status = DS_CreateModel_(buffer_model.str(), true, &ctx);
+    status = DS_CreateModelFromBuffer(buffer_model.str(), &ctx);
   }else {
     // Keep old method due to backwards compatibility
     status = DS_CreateModel(model, &ctx);
@@ -451,7 +451,7 @@ main(int argc, char **argv)
       std::ifstream is_scorer(scorer, std::ios::binary );
       std::stringstream buffer_scorer;
       buffer_scorer << is_scorer.rdbuf();
-      status = DS_EnableExternalScorer_(ctx, buffer_scorer.str(), true);
+      status = DS_EnableExternalScorerFromBuffer(ctx, buffer_scorer.str());
     } else {
       // Keep old method due to backwards compatibility
       status = DS_EnableExternalScorer(ctx, scorer);

native_client/deepspeech.cc

@@ -269,6 +269,13 @@ DS_CreateModel(const char* aModelPath,
   return DS_CreateModel_(aModelPath, false, retval);
 }
 
+int
+DS_CreateModelFromBuffer(const std::string &aModelBuffer,
+                         ModelState** retval)
+{
+  return DS_CreateModel_(aModelBuffer, true, retval);
+}
+
 int
 DS_CreateModel_(const std::string &aModelString,
                 bool init_from_bytes,
@@ -344,6 +351,13 @@ DS_EnableExternalScorer(ModelState* aCtx,
   return DS_EnableExternalScorer_(aCtx, aScorerPath, false);
 }
 
+int
+DS_EnableExternalScorerFromBuffer(ModelState* aCtx,
+                                  const std::string &aScorerBuffer)
+{
+  return DS_EnableExternalScorer_(aCtx, aScorerBuffer, true);
+}
+
 int
 DS_EnableExternalScorer_(ModelState* aCtx,
                          const std::string &aScorerString,

native_client/deepspeech.h

@@ -109,6 +109,19 @@ DEEPSPEECH_EXPORT
 int DS_CreateModel(const char* aModelPath,
                    ModelState** retval);
 
+/**
+ * @brief An object providing an interface to a trained DeepSpeech model, loaded from buffer.
+ *
+ * @param aModelBuffer The buffer containing the content of frozen model graph.
+ * @param[out] retval a ModelState pointer
+ *
+ * @return Zero on success, non-zero on failure.
+ */
+DEEPSPEECH_EXPORT
+int DS_CreateModelFromBuffer(const std::string &aModelBuffer,
+                             ModelState** retval);
+
+
 /**
  * @brief An object providing an interface to a trained DeepSpeech model.
  *
@@ -176,6 +189,18 @@ DEEPSPEECH_EXPORT
 int DS_EnableExternalScorer(ModelState* aCtx,
                             const char* aScorerPath);
 
+/**
+ * @brief Enable decoding using an external scorer loaded from buffer.
+ *
+ * @param aCtx The ModelState pointer for the model being changed.
+ * @param aScorerBuffer The buffer containing the content of an external-scorer file.
+ *
+ * @return Zero on success, non-zero on failure (invalid arguments).
+ */
+DEEPSPEECH_EXPORT
+int DS_EnableExternalScorerFromBuffer(ModelState* aCtx,
+                                      const std::string &aScorerBuffer);
+
 /**
  * @brief Enable decoding using an external scorer.
  *