MXF -> Asset in lots of places.

1 files changed, 121 insertions, 0 deletions

diff --git a/src/sound_asset_writer.cc b/src/sound_asset_writer.cc
new file mode 100644
index 00000000..8d302ed3
--- /dev/null
+++ b/src/sound_asset_writer.cc
@@ -0,0 +1,121 @@
+/*
+    Copyright (C) 2012-2014 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 "sound_asset_writer.h"
+#include "sound_asset.h"
+#include "exceptions.h"
+#include "dcp_assert.h"
+#include "compose.hpp"
+#include "AS_DCP.h"
+
+using namespace dcp;
+
+struct SoundAssetWriter::ASDCPState
+{
+	ASDCP::PCM::MXFWriter mxf_writer;
+	ASDCP::PCM::FrameBuffer frame_buffer;
+	ASDCP::WriterInfo writer_info;
+	ASDCP::PCM::AudioDescriptor audio_desc;
+};
+
+SoundAssetWriter::SoundAssetWriter (SoundAsset* asset, boost::filesystem::path file, Standard standard)
+	: AssetWriter (asset, file)
+	, _state (new SoundAssetWriter::ASDCPState)
+	, _sound_asset (asset)
+	, _frame_buffer_offset (0)
+{
+	/* Derived from ASDCP::Wav::SimpleWaveHeader::FillADesc */
+	_state->audio_desc.EditRate = ASDCP::Rational (_sound_asset->edit_rate().numerator, _sound_asset->edit_rate().denominator);
+	_state->audio_desc.AudioSamplingRate = ASDCP::Rational (_sound_asset->sampling_rate(), 1);
+	_state->audio_desc.Locked = 0;
+	_state->audio_desc.ChannelCount = _sound_asset->channels ();
+	_state->audio_desc.QuantizationBits = 24;
+	_state->audio_desc.BlockAlign = 3 * _sound_asset->channels();
+	_state->audio_desc.AvgBps = _sound_asset->sampling_rate() * _state->audio_desc.BlockAlign;
+	_state->audio_desc.LinkedTrackID = 0;
+	_state->audio_desc.ChannelFormat = ASDCP::PCM::CF_NONE;
+	
+	_state->frame_buffer.Capacity (ASDCP::PCM::CalcFrameBufferSize (_state->audio_desc));
+	_state->frame_buffer.Size (ASDCP::PCM::CalcFrameBufferSize (_state->audio_desc));
+	memset (_state->frame_buffer.Data(), 0, _state->frame_buffer.Capacity());
+	
+	_sound_asset->fill_writer_info (&_state->writer_info, _sound_asset->id(), standard);
+	
+	Kumu::Result_t r = _state->mxf_writer.OpenWrite (file.string().c_str(), _state->writer_info, _state->audio_desc);
+	if (ASDCP_FAILURE (r)) {
+		boost::throw_exception (FileError ("could not open audio MXF for writing", file.string(), r));
+	}
+
+	_sound_asset->set_file (file);
+}
+
+void
+SoundAssetWriter::write (float const * const * data, int frames)
+{
+	DCP_ASSERT (!_finalized);
+	
+	for (int i = 0; i < frames; ++i) {
+
+		byte_t* out = _state->frame_buffer.Data() + _frame_buffer_offset;
+
+		/* Write one sample per channel */
+		for (int j = 0; j < _sound_asset->channels(); ++j) {
+			int32_t const s = data[j][i] * (1 << 23);
+			*out++ = (s & 0xff);
+			*out++ = (s & 0xff00) >> 8;
+			*out++ = (s & 0xff0000) >> 16;
+		}
+		_frame_buffer_offset += 3 * _sound_asset->channels();
+
+		DCP_ASSERT (_frame_buffer_offset <= int (_state->frame_buffer.Capacity()));
+
+		/* Finish the MXF frame if required */
+		if (_frame_buffer_offset == int (_state->frame_buffer.Capacity())) {
+			write_current_frame ();
+			_frame_buffer_offset = 0;
+			memset (_state->frame_buffer.Data(), 0, _state->frame_buffer.Capacity());
+		}
+	}
+}
+
+void
+SoundAssetWriter::write_current_frame ()
+{
+	ASDCP::Result_t const r = _state->mxf_writer.WriteFrame (_state->frame_buffer, _encryption_context, 0);
+	if (ASDCP_FAILURE (r)) {
+		boost::throw_exception (MiscError (String::compose ("could not write audio MXF frame (%1)", int (r))));
+	}
+
+	++_frames_written;
+}
+
+void
+SoundAssetWriter::finalize ()
+{
+	if (_frame_buffer_offset > 0) {
+		write_current_frame ();
+	}
+	
+	if (ASDCP_FAILURE (_state->mxf_writer.Finalize())) {
+		boost::throw_exception (MiscError ("could not finalise audio MXF"));
+	}
+
+	_sound_asset->_intrinsic_duration = _frames_written;
+	AssetWriter::finalize ();
+}