From 4d56f34a726c444d5db35dca58637dbe0e798884 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Andr=C3=A1s=20Veres-Szentkir=C3=A1lyi?= <vsza@vsza.hu>
Date: Fri, 22 Nov 2013 17:00:53 +0100
Subject: [PATCH] gen_values: fixed FM sample repetition bug

In the previous version, the FM modulator issued the last sample of the
previous frequency-time tuple twice, once as the last sample of the
previous tuple, once as the first sample (sample = 0) of the next one.
---
 pysstv/sstv.py            | 2 +-
 pysstv/tests/test_sstv.py | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/pysstv/sstv.py b/pysstv/sstv.py
index 5f8d6f3..496a953 100644
--- a/pysstv/sstv.py
+++ b/pysstv/sstv.py
@@ -83,7 +83,7 @@ class SSTV(object):
             freq_factor = freq * factor
             for sample in xrange(tx):
                 yield sin(sample * freq_factor + offset)
-            offset += sample * freq_factor
+            offset += (sample + 1) * freq_factor
             samples -= tx
 
     def gen_freq_bits(self):
diff --git a/pysstv/tests/test_sstv.py b/pysstv/tests/test_sstv.py
index 022f135..ffcd630 100644
--- a/pysstv/tests/test_sstv.py
+++ b/pysstv/tests/test_sstv.py
@@ -69,7 +69,7 @@ class TestSSTV(unittest.TestCase):
         mock_open = MagicMock(return_value=sio)
         with mock.patch('__builtin__.open', mock_open):
             self.s.write_wav('unittest.wav')
-        expected = '8aa1d52b222b411e032ce2bce77d203a'
+        expected = 'dd7eed880ab3360fb79ce09c469deee2'
         data = sio.getvalue()
         actual = hashlib.md5(data).hexdigest()
         self.assertEqual(expected, actual)