Clean up libardour tests a bit.

git-svn-id: svn://localhost/ardour2/branches/3.0@12641 d708f5d6-7413-0410-9779-e7cbd77b26cf

1 files changed, 94 insertions, 0 deletions

diff --git a/libs/ardour/test/audio_region_read_test.cc b/libs/ardour/test/audio_region_read_test.cc
new file mode 100644
index 0000000000..dc3127ea2e
--- /dev/null
+++ b/libs/ardour/test/audio_region_read_test.cc
@@ -0,0 +1,94 @@
+/*
+    Copyright (C) 2012 Paul Davis
+
+    This program is free software; you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation; either version 2 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program; if not, write to the Free Software
+    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+*/
+
+#include "ardour/playlist.h"
+#include "ardour/region.h"
+#include "ardour/audioregion.h"
+#include "audio_region_read_test.h"
+#include "test_globals.h"
+
+CPPUNIT_TEST_SUITE_REGISTRATION (AudioRegionReadTest);
+
+using namespace std;
+using namespace ARDOUR;
+
+/** Check some basic reads */
+void
+AudioRegionReadTest::readTest ()
+{
+	int const N = 1024;
+	
+	Sample buf[N];
+	Sample mbuf[N];
+	float gbuf[N];
+
+	int const P = 100;
+
+	/* Simple read: 256 frames from start of region, no fades */
+
+	_ar[0]->set_position (P);
+	_ar[0]->set_length (1024);
+
+	_ar[0]->read_from_sources (_ar[0]->_sources, _ar[0]->_length, buf, P, 256, 0);
+	check_staircase (buf, 0, 256);
+
+	for (int i = 0; i < N; ++i) {
+		buf[i] = 0;
+	}
+
+	/* Offset read: 256 frames from 128 frames into the region, no fades */
+	_ar[0]->read_from_sources (_ar[0]->_sources, _ar[0]->_length, buf, P + 128, 256, 0);
+	check_staircase (buf, 128, 256);
+
+	/* Simple read with a fade-in: 256 frames from start of region, with fades */
+	_ar[0]->set_default_fade_in ();
+	CPPUNIT_ASSERT_EQUAL (double (64), _ar[0]->_fade_in->back()->when);
+
+	for (int i = 0; i < N; ++i) {
+		buf[i] = 0;
+	}
+
+	_ar[0]->read_at (buf, mbuf, gbuf, P, 256, 0);
+	for (int i = 0; i < 64; ++i) {
+		/* XXX: this isn't very accurate, but close enough for now; needs investigation */
+		CPPUNIT_ASSERT_DOUBLES_EQUAL (float (i * i / 63.0), buf[i], 1e-4);
+	}
+	for (int i = 64; i < P; ++i) {
+		CPPUNIT_ASSERT_EQUAL (i, int (buf[i]));
+	}
+	
+	/* Offset read: 256 frames from 128 frames into the region, with fades
+	   (though the fade should not affect it, as it is finished before the read starts)
+	*/
+
+	for (int i = 0; i < N; ++i) {
+		buf[i] = 0;
+	}
+	
+	_ar[0]->read_at (buf, mbuf, gbuf, P + 128, 256, 0);
+	check_staircase (buf, 128, 256);
+}
+
+void
+AudioRegionReadTest::check_staircase (Sample* b, int offset, int N)
+{
+	for (int i = 0; i < N; ++i) {
+		int const j = i + offset;
+		CPPUNIT_ASSERT_EQUAL (j, int (b[i]));
+	}
+}