Import.

1 files changed, 131 insertions, 0 deletions

diff --git a/src/sound_asset.cc b/src/sound_asset.cc
new file mode 100644
index 00000000..30083719
--- /dev/null
+++ b/src/sound_asset.cc
@@ -0,0 +1,131 @@
+/*
+    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 <iostream>
+#include <stdexcept>
+#include <boost/filesystem.hpp>
+#include <AS_DCP.h>
+#include "sound_asset.h"
+#include "util.h"
+
+using namespace std;
+using namespace boost;
+using namespace libdcp;
+
+SoundAsset::SoundAsset (list<string> const & files, string p, int fps, int len)
+	: Asset (p, fps, len)
+{
+	ASDCP::Rational asdcp_fps (_fps, 1);
+	
+ 	ASDCP::PCM::WAVParser pcm_parser_channel[files.size()];
+	if (pcm_parser_channel[0].OpenRead (files.front().c_str(), asdcp_fps)) {
+		throw runtime_error ("could not open WAV file for reading");
+	}
+	
+	ASDCP::PCM::AudioDescriptor audio_desc;
+	pcm_parser_channel[0].FillAudioDescriptor (audio_desc);
+	audio_desc.ChannelCount = 0;
+	audio_desc.BlockAlign = 0;
+	audio_desc.EditRate = asdcp_fps;
+	audio_desc.AvgBps = audio_desc.AvgBps * files.size ();
+
+	ASDCP::PCM::FrameBuffer frame_buffer_channel[files.size()];
+	ASDCP::PCM::AudioDescriptor audio_desc_channel[files.size()];
+	
+	int j = 0;
+	for (list<string>::const_iterator i = files.begin(); i != files.end(); ++i) {
+		
+		if (ASDCP_FAILURE (pcm_parser_channel[j].OpenRead (i->c_str(), asdcp_fps))) {
+			throw runtime_error ("could not open WAV file for reading");
+		}
+
+		pcm_parser_channel[j].FillAudioDescriptor (audio_desc_channel[j]);
+		frame_buffer_channel[j].Capacity (ASDCP::PCM::CalcFrameBufferSize (audio_desc_channel[j]));
+
+		audio_desc.ChannelCount += audio_desc_channel[j].ChannelCount;
+		audio_desc.BlockAlign += audio_desc_channel[j].BlockAlign;
+		++j;
+	}
+
+	ASDCP::PCM::FrameBuffer frame_buffer;
+	frame_buffer.Capacity (ASDCP::PCM::CalcFrameBufferSize (audio_desc));
+	frame_buffer.Size (ASDCP::PCM::CalcFrameBufferSize (audio_desc));
+
+	ASDCP::WriterInfo writer_info;
+	fill_writer_info (&writer_info);
+
+	ASDCP::PCM::MXFWriter mxf_writer;
+	if (ASDCP_FAILURE (mxf_writer.OpenWrite (_mxf_path.c_str(), writer_info, audio_desc))) {
+		throw runtime_error ("could not open audio MXF for writing");
+	}
+
+	for (int i = 0; i < _length; ++i) {
+
+		byte_t *data_s = frame_buffer.Data();
+		byte_t *data_e = data_s + frame_buffer.Capacity();
+		byte_t sample_size = ASDCP::PCM::CalcSampleSize (audio_desc_channel[0]);
+		int offset = 0;
+
+		for (list<string>::size_type j = 0; j < files.size(); ++j) {
+			memset (frame_buffer_channel[j].Data(), 0, frame_buffer_channel[j].Capacity());
+			if (ASDCP_FAILURE (pcm_parser_channel[j].ReadFrame (frame_buffer_channel[j]))) {
+				throw runtime_error ("could not read audio frame");
+			}
+			
+			if (frame_buffer_channel[j].Size() != frame_buffer_channel[j].Capacity()) {
+				throw runtime_error ("short audio frame");
+			}
+		}
+
+		while (data_s < data_e) {
+			for (list<string>::size_type j = 0; j < files.size(); ++j) {
+				byte_t* frame = frame_buffer_channel[j].Data() + offset;
+				memcpy (data_s, frame, sample_size);
+				data_s += sample_size;
+			}
+			offset += sample_size;
+		}
+
+		if (ASDCP_FAILURE (mxf_writer.WriteFrame (frame_buffer, 0, 0))) {
+			throw runtime_error ("could not write audio MXF frame");
+		}
+
+		Progress (float (i) / _length);
+	}
+
+	if (ASDCP_FAILURE (mxf_writer.Finalize())) {
+		throw runtime_error ("could not finalise audio MXF");
+	}
+
+	_digest = make_digest (_mxf_path);
+}
+
+void
+SoundAsset::write_to_cpl (ostream& s) const
+{
+	s << "        <MainSound>\n"
+	  << "          <Id>" << _uuid << "</Id>\n"
+	  << "          <AnnotationText>" << filesystem::path(_mxf_path).filename() << "</AnnotationText>\n"
+	  << "          <EditRate>" << _fps << "</EditRate>\n"
+	  << "          <IntrinsicDuration>" << _length << "</IntrinsicDuration>\n"
+	  << "          <EntryPoint>0</EntryPoint>\n"
+	  << "          <Duration>" << _length << "</Duration>\n"
+	  << "        </MainSound>\n";
+}
+