From 916247147468aee47354ebb3088f47b8a56fcccf Mon Sep 17 00:00:00 2001
From: Carl Hetherington <cth@carlh.net>
Date: Sun, 12 Aug 2012 20:52:15 +0100
Subject: Don't crash with no audio; get video MXF information from the MXF
 itself; get sampling rate from audio MXF.

---
 src/sound_frame.cc | 58 ++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 58 insertions(+)
 create mode 100644 src/sound_frame.cc

(limited to 'src/sound_frame.cc')

diff --git a/src/sound_frame.cc b/src/sound_frame.cc
new file mode 100644
index 00000000..ed626f5e
--- /dev/null
+++ b/src/sound_frame.cc
@@ -0,0 +1,58 @@
+/*
+    Copyright (C) 2012 Carl Hetherington <cth@carlh.net>
+
+    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 "AS_DCP.h"
+#include "KM_fileio.h"
+#include "sound_frame.h"
+#include "exceptions.h"
+
+using namespace std;
+using namespace libdcp;
+
+SoundFrame::SoundFrame (string mxf_path, int n)
+{
+	ASDCP::PCM::MXFReader reader;
+	if (ASDCP_FAILURE (reader.OpenRead (mxf_path.c_str()))) {
+		throw FileError ("could not open MXF file for reading", mxf_path);
+	}
+
+	/* XXX: unfortunate guesswork on this buffer size */
+	_buffer = new ASDCP::PCM::FrameBuffer (1 * Kumu::Megabyte);
+
+	if (ASDCP_FAILURE (reader.ReadFrame (n, *_buffer))) {
+		throw DCPReadError ("could not read audio frame");
+	}
+}
+
+SoundFrame::~SoundFrame ()
+{
+	delete _buffer;
+}
+
+uint8_t const *
+SoundFrame::data () const
+{
+	return _buffer->RoData();
+}
+
+int
+SoundFrame::size () const
+{
+	return _buffer->Size ();
+}
-- 
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