From 2d9dd81f4674e6ab1cb1416d4c80f84fcebbe3c5 Mon Sep 17 00:00:00 2001
From: Kovid Goyal <kovid@kovidgoyal.net>
Date: Fri, 13 Nov 2020 11:29:42 +0530
Subject: [PATCH] Code to list espeak voices

---
 src/calibre/utils/tts/espeak.cpp | 65 +++++++++++++++++++++++++++++++-
 1 file changed, 64 insertions(+), 1 deletion(-)

diff --git a/src/calibre/utils/tts/espeak.cpp b/src/calibre/utils/tts/espeak.cpp
index 4d3413824c..786fbce34a 100644
--- a/src/calibre/utils/tts/espeak.cpp
+++ b/src/calibre/utils/tts/espeak.cpp
@@ -12,11 +12,74 @@
 #include <Python.h>
 #include <espeak-ng/speak_lib.h>
 
+class pyobject_raii {
+	private:
+		PyObject *handle;
+		pyobject_raii( const pyobject_raii & ) ;
+		pyobject_raii & operator=( const pyobject_raii & ) ;
+
+	public:
+		pyobject_raii() : handle(NULL) {}
+		pyobject_raii(PyObject* h) : handle(h) {}
+
+		~pyobject_raii() { Py_CLEAR(handle); }
+
+		PyObject *ptr() { return handle; }
+		void set_ptr(PyObject *val) { handle = val; }
+		PyObject **address() { return &handle; }
+		explicit operator bool() const { return handle != NULL; }
+        PyObject *detach() { PyObject *ans = handle; handle = NULL; return ans; }
+};
+
 static bool initialize_called = false;
 
+static PyObject*
+info(PyObject *self, PyObject *args) {
+	const char *path_data;
+	const char *version = espeak_Info(&path_data);
+	return Py_BuildValue("ss", version, path_data);
+}
+
+static PyObject*
+list_voices(PyObject *self, PyObject *args, PyObject *kw) {
+	espeak_VOICE q = {0};
+	static const char* kwds[] = {"name", "language", "identifier", "gender", "age", NULL};
+	if (!PyArg_ParseTupleAndKeywords(args, kw, "|$sssBB", (char**)kwds, &q.name, &q.languages, &q.identifier, &q.gender, &q.age)) return NULL;
+	const espeak_VOICE **voices;
+	Py_BEGIN_ALLOW_THREADS;
+	voices = espeak_ListVoices(&q);
+	Py_END_ALLOW_THREADS;
+	pyobject_raii ans(PyList_New(0));
+	if (!ans) return NULL;
+	while (*voices) {
+		const espeak_VOICE *x = *voices;
+		pyobject_raii languages(PyList_New(0));
+		if (!languages) return NULL;
+		const char *pos = x->languages;
+		while (pos && *pos) {
+			const char priority = *pos;
+			size_t sz = strlen(++pos);
+			if (!sz) break;
+			pyobject_raii lang(Py_BuildValue("bs", priority, pos));
+			if (!lang) return NULL;
+			if (PyList_Append(languages.ptr(), lang.ptr()) != 0) return NULL;
+			pos += sz + 1;
+		}
+		pyobject_raii entry(Py_BuildValue("{ss ss sO sB sB}",
+					"name", x->name, "identifier", x->identifier, "languages", languages.ptr(),
+					"gender", x->gender, "age", x->age));
+		if (!entry) return NULL;
+		if (PyList_Append(ans.ptr(), entry.ptr()) != 0) return NULL;
+		voices++;
+	}
+	return ans.detach();
+}
+
 // Boilerplate {{{
-#define M(name, args) { #name, (PyCFunction)name, args, ""}
+#define M(name, args, doc) { #name, (PyCFunction)name, args, ""}
 static PyMethodDef methods[] = {
+	M(info, METH_VARARGS, "version and path"),
+	M(list_voices, METH_VARARGS | METH_KEYWORDS, "list available voices"),
     {NULL, NULL, 0, NULL}
 };
 #undef M