Ejemplos de get_compression_info en Python

Ejemplo n.º 1

Archivo: test_bag.py Proyecto: zhuhaijun753/ROSCH

    def test_get_compression_info(self):
        fn = '/tmp/test_get_compression_info.bag'

        # No Compression
        with rosbag.Bag(fn, mode='w') as bag:
            for i in xrange(100):
                bag.write("/test_bag", Int32(data=i))

        with rosbag.Bag(fn) as bag:
            info = bag.get_compression_info()
            self.assertEquals(info.compression, rosbag.Compression.NONE)
            # 167 Bytes of overhead, 50 Bytes per Int32.
            self.assertEquals(info.uncompressed, 5167)
            self.assertEquals(info.compressed, 5167)

        with rosbag.Bag(fn, mode='w',
                        compression=rosbag.Compression.BZ2) as bag:
            for i in xrange(100):
                bag.write("/test_bag", Int32(data=i))

        with rosbag.Bag(fn) as bag:
            info = bag.get_compression_info()
            self.assertEquals(info.compression, rosbag.Compression.BZ2)
            self.assertEquals(info.uncompressed, 5167)

            # the value varies each run, I suspect based on rand, but seems
            # to generally be around 960 to 980 on my comp
            self.assertLess(info.compressed, 1000)
            self.assertGreater(info.compressed, 900)

Ejemplo n.º 2

Archivo: test_bag.py Proyecto: Mygao/ros_comm

 def test_get_compression_info(self):
     fn = '/tmp/test_get_compression_info.bag'
     
     # No Compression
     with rosbag.Bag(fn, mode='w') as bag:
         for i in xrange(100):
             bag.write("/test_bag", Int32(data=i))
             
     with rosbag.Bag(fn) as bag:
         info = bag.get_compression_info()
         self.assertEquals(info.compression, rosbag.Compression.NONE)
         # 167 Bytes of overhead, 50 Bytes per Int32.
         self.assertEquals(info.uncompressed, 5166)
         self.assertEquals(info.compressed, 5166)
     
     with rosbag.Bag(fn, mode='w', compression=rosbag.Compression.BZ2) as bag:
         for i in xrange(100):
             bag.write("/test_bag", Int32(data=i))
             
     with rosbag.Bag(fn) as bag:
         info = bag.get_compression_info()
         self.assertEquals(info.compression, rosbag.Compression.BZ2)
         self.assertEquals(info.uncompressed, 5166)
         
         # the value varies each run, I suspect based on rand, but seems
         # to generally be around 960 to 980 on my comp
         self.assertLess(info.compressed, 1000)
         self.assertGreater(info.compressed, 900)