Remove multiple definitions of `SoxEffect`. (#635)

Fix #628

setup.py

@@ -88,7 +88,7 @@ else:
             '_torch_sox',
             ['torchaudio/torch_sox.cpp'],
             libraries=libraries,
-            include_dirs=include_dirs,
+            include_dirs=include_dirs + [cwd],
             extra_compile_args=eca,
             extra_objects=extra_objects,
             extra_link_args=ela),

torchaudio/torch_sox.cpp

+#include <torchaudio/torch_sox.h>
+
 #include <torch/extension.h>
 
 #include <sox.h>
@@ -70,12 +72,6 @@ void read_audio(
 }
 } // namespace
 
-struct SoxEffect {
-  SoxEffect() : ename(""), eopts({""})  { }
-  std::string ename;
-  std::vector<std::string> eopts;
-};
-
 std::tuple<sox_signalinfo_t, sox_encodinginfo_t> get_info(
     const std::string& file_name
   ) {
@@ -195,7 +191,7 @@ void write_audio_file(
 }
 
 int initialize_sox() {
-  /* Initializion for sox effects.  Only initialize once  */
+  /* Initialization for sox effects.  Only initialize once  */
   return sox_init();
 }
 

torchaudio/torch_sox.h

+#include <sox.h>
+
 #include <string>
+#include <tuple>
+#include <vector>
+
+#include <torch/extension.h>
 
 namespace at {
 struct Tensor;
@@ -9,7 +15,7 @@ namespace torch { namespace audio {
 /// Reads an audio file from the given `path` into the `output` `Tensor` and
 /// returns the sample rate of the audio file.
 /// Throws `std::runtime_error` if the audio file could not be opened, or an
-/// error ocurred during reading of the audio data.
+/// error occurred during reading of the audio data.
 int read_audio_file(
     const std::string& file_name,
     at::Tensor output,
@@ -18,24 +24,24 @@ int read_audio_file(
     int64_t offset,
     sox_signalinfo_t* si,
     sox_encodinginfo_t* ei,
-    const char* ft)
+    const char* ft);
 
 /// Writes the data of a `Tensor` into an audio file at the given `path`, with
 /// a certain extension (e.g. `wav`or `mp3`) and sample rate.
 /// Throws `std::runtime_error` when the audio file could not be opened for
-/// writing, or an error ocurred during writing of the audio data.
+/// writing, or an error occurred during writing of the audio data.
 void write_audio_file(
     const std::string& file_name,
-    at::Tensor& tensor,
+    const at::Tensor& tensor,
     sox_signalinfo_t* si,
     sox_encodinginfo_t* ei,
-    const char* file_type)
+    const char* file_type);
 
 /// Reads an audio file from the given `path` and returns a tuple of
 /// sox_signalinfo_t and sox_encodinginfo_t, which contain information about
 /// the audio file such as sample rate, length, bit precision, encoding and more.
 /// Throws `std::runtime_error` if the audio file could not be opened, or an
-/// error ocurred during reading of the audio data.
+/// error occurred during reading of the audio data.
 std::tuple<sox_signalinfo_t, sox_encodinginfo_t> get_info(
     const std::string& file_name);