Make reader and writer classes picklable

Fixes #16

bob/io/video/reader.cpp

@@ -28,7 +28,7 @@ static auto s_reader = bob::extension::ClassDoc(
   .add_parameter("filename", "str", "The file path to the file you want to read data from")
   .add_parameter("check", "bool", "Format and codec will be extracted from the video metadata.")
 );
-
+static auto s_fullname = BOB_EXT_MODULE_PREFIX ".reader";
 
 static void PyBobIoVideoReader_Delete (PyBobIoVideoReaderObject* o) {
   o->v.reset();
@@ -557,7 +557,7 @@ PyTypeObject PyBobIoVideoReaderIterator_Type = {
 bool init_BobIoVideoReader(PyObject* module){
 
   // initialize the reader
-  PyBobIoVideoReader_Type.tp_name = s_reader.name();
+  PyBobIoVideoReader_Type.tp_name = s_fullname;
   PyBobIoVideoReader_Type.tp_basicsize = sizeof(PyBobIoVideoReaderObject);
   PyBobIoVideoReader_Type.tp_flags = Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE;
   PyBobIoVideoReader_Type.tp_doc = s_reader.doc();

bob/io/video/test.py

@@ -19,6 +19,13 @@ from bob.io.base import load
 INPUT_VIDEO = test_utils.datafile('test.mov', __name__)
 
 
+def test_picklability():
+  from . import reader, writer
+  import pickle
+  assert reader is pickle.loads(pickle.dumps(reader))
+  assert writer is pickle.loads(pickle.dumps(writer))
+
+
 def test_codec_support():
 
   # Describes all encoders

bob/io/video/writer.cpp

@@ -34,6 +34,7 @@ static auto s_writer = bob::extension::ClassDoc(
   .add_parameter("format", "str", "[Default: ``''``] If you must, specify a valid FFmpeg output format name and that will be used to encode the video on the output file. Leave it empty to guess from the filename extension")
   .add_parameter("check", "bool", "[Default: ``True``] ")
 );
+static auto s_fullname = BOB_EXT_MODULE_PREFIX ".writer";
 
 
 static void PyBobIoVideoWriter_Delete (PyBobIoVideoWriterObject* o) {
@@ -482,7 +483,7 @@ PyTypeObject PyBobIoVideoWriter_Type = {
 bool init_BobIoVideoWriter(PyObject* module){
 
   // initialize the writer
-  PyBobIoVideoWriter_Type.tp_name = s_writer.name();
+  PyBobIoVideoWriter_Type.tp_name = s_fullname;
   PyBobIoVideoWriter_Type.tp_basicsize = sizeof(PyBobIoVideoWriterObject);
   PyBobIoVideoWriter_Type.tp_flags = Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE;
   PyBobIoVideoWriter_Type.tp_doc = s_writer.doc();