Code to get and set rate and volume

src/calibre/utils/windows/winsapi.cpp

@@ -54,6 +54,8 @@ Voice_dealloc(Voice *self) {
     CoUninitialize();
 }
 
+
+// Enumeration {{{
 static PyObject*
 Voice_get_all_sound_outputs(Voice *self, PyObject *args) {
     HRESULT hr = S_OK;
@@ -193,16 +195,59 @@ Voice_get_all_voices(Voice *self, PyObject *args) {
     }
     return PyList_AsTuple(ans.ptr());
 }
+// }}}
 
 
+// Volume and rate {{{
+static PyObject*
+Voice_get_current_volume(Voice *self, PyObject *args) {
+    HRESULT hr = S_OK;
+    USHORT volume;
+    if (FAILED(hr = self->voice->GetVolume(&volume))) return error_from_hresult(hr);
+    return PyLong_FromUnsignedLong((unsigned long)volume);
+}
+
+static PyObject*
+Voice_get_current_rate(Voice *self, PyObject *args) {
+    HRESULT hr = S_OK;
+    long rate;
+    if (FAILED(hr = self->voice->GetRate(&rate))) return error_from_hresult(hr);
+    return PyLong_FromLong(rate);
+}
+
+static PyObject*
+Voice_set_current_rate(Voice *self, PyObject *args) {
+    HRESULT hr = S_OK;
+    long rate;
+    if (!PyArg_ParseTuple(args, "l", &rate)) return NULL;
+    if (rate < -10 || rate > 10) { PyErr_SetString(PyExc_ValueError, "rate must be between -10 and 10"); return NULL; }
+    if (FAILED(hr = self->voice->SetRate(rate))) return error_from_hresult(hr);
+    Py_RETURN_NONE;
+}
+
+static PyObject*
+Voice_set_current_volume(Voice *self, PyObject *args) {
+    HRESULT hr = S_OK;
+    unsigned short volume;
+    if (!PyArg_ParseTuple(args, "H", &volume)) return NULL;
+    if (FAILED(hr = self->voice->SetVolume(volume))) return error_from_hresult(hr);
+    Py_RETURN_NONE;
+}
+// }}}
+
 #define M(name, args) { #name, (PyCFunction)Voice_##name, args, ""}
 static PyMethodDef Voice_methods[] = {
     M(get_all_voices, METH_NOARGS),
+    M(get_all_sound_outputs, METH_NOARGS),
+
+    M(get_current_rate, METH_NOARGS),
+    M(get_current_volume, METH_NOARGS),
     M(get_current_voice, METH_NOARGS),
     M(get_current_sound_output, METH_NOARGS),
     M(set_current_voice, METH_VARARGS),
+    M(set_current_rate, METH_VARARGS),
+    M(set_current_volume, METH_VARARGS),
     M(set_current_sound_output, METH_VARARGS),
-    M(get_all_sound_outputs, METH_NOARGS),
     {NULL, NULL, 0, NULL}
 };
 #undef M

src/calibre/utils/windows/winsapi.py

@@ -16,6 +16,8 @@ def develop():
 
 def find_tests():
     import unittest
+    import os
+    is_ci = os.environ.get('CI', '').lower() == 'true'
 
     class TestSAPI(unittest.TestCase):
 
@@ -39,6 +41,7 @@ def find_tests():
             self.sapi.set_current_voice()
             self.assertEqual(self.sapi.get_current_voice(), default_voice)
 
+        @unittest.skipIf(is_ci, 'No sound output on CI')
         def test_enumeration_of_sound_outputs(self):
             default_output = self.sapi.get_current_sound_output()
             self.assertTrue(default_output)
@@ -53,6 +56,19 @@ def find_tests():
             self.sapi.set_current_sound_output()
             self.assertEqual(self.sapi.get_current_sound_output(), default_output)
 
+        def test_volume_and_rate(self):
+            dr = self.sapi.get_current_rate()
+            new_rate = dr // 2 + 1
+            self.sapi.set_current_rate(new_rate)
+            self.assertEqual(self.sapi.get_current_rate(), new_rate)
+            self.sapi.set_current_rate(dr)
+
+            dv = self.sapi.get_current_volume()
+            new_vol = dv // 2 + 3
+            self.sapi.set_current_volume(new_vol)
+            self.assertEqual(self.sapi.get_current_volume(), new_vol)
+            self.sapi.set_current_volume(dv)
+
     return unittest.defaultTestLoader.loadTestsFromTestCase(TestSAPI)