/*
Copyright (C) 2012-2014 Carl Hetherington <cth@carlh.net>
- This program is free software; you can redistribute it and/or modify
+ This file is part of libdcp.
+
+ libdcp 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,
+ libdcp 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.
-
+ along with libdcp. If not, see <http://www.gnu.org/licenses/>.
+
+ In addition, as a special exception, the copyright holders give
+ permission to link the code of portions of this program with the
+ OpenSSL library under certain conditions as described in each
+ individual source file, and distribute linked combinations
+ including the two.
+
+ You must obey the GNU General Public License in all respects
+ for all of the code used other than OpenSSL. If you modify
+ file(s) with this exception, you may extend this exception to your
+ version of the file(s), but you are not obligated to do so. If you
+ do not wish to do so, delete this exception statement from your
+ version. If you delete this exception statement from all source
+ files in the program, then also delete it here.
*/
#include "sound_asset_writer.h"
#include "exceptions.h"
#include "dcp_assert.h"
#include "compose.hpp"
-#include "AS_DCP.h"
+#include "crypto_context.h"
+#include <asdcp/AS_DCP.h>
+#include <iostream>
+using std::min;
+using std::max;
+using std::cout;
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;
+ ASDCP::PCM::AudioDescriptor desc;
};
-SoundAssetWriter::SoundAssetWriter (SoundAsset* asset, boost::filesystem::path file, Standard standard)
+SoundAssetWriter::SoundAssetWriter (SoundAsset* asset, boost::filesystem::path file)
: AssetWriter (asset, file)
, _state (new SoundAssetWriter::ASDCPState)
- , _sound_asset (asset)
+ , _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));
+ _state->desc.EditRate = ASDCP::Rational (_asset->edit_rate().numerator, _asset->edit_rate().denominator);
+ _state->desc.AudioSamplingRate = ASDCP::Rational (_asset->sampling_rate(), 1);
+ _state->desc.Locked = 0;
+ _state->desc.ChannelCount = _asset->channels ();
+ _state->desc.QuantizationBits = 24;
+ _state->desc.BlockAlign = 3 * _asset->channels();
+ _state->desc.AvgBps = _asset->sampling_rate() * _state->desc.BlockAlign;
+ _state->desc.LinkedTrackID = 0;
+ if (asset->standard() == INTEROP) {
+ _state->desc.ChannelFormat = ASDCP::PCM::CF_NONE;
+ } else {
+ /* Just use WTF ("wild track format") for SMPTE for now; searches suggest that this
+ uses the same assignment as Interop.
+ */
+ _state->desc.ChannelFormat = ASDCP::PCM::CF_CFG_4;
+ }
+
+ /* I'm fairly sure this is not necessary, as ContainerDuration is written
+ in ASDCP's WriteMXFFooter, but it stops a valgrind warning.
+ */
+ _state->desc.ContainerDuration = 0;
+
+ _state->frame_buffer.Capacity (ASDCP::PCM::CalcFrameBufferSize (_state->desc));
+ _state->frame_buffer.Size (ASDCP::PCM::CalcFrameBufferSize (_state->desc));
memset (_state->frame_buffer.Data(), 0, _state->frame_buffer.Capacity());
- _sound_asset->fill_writer_info (&_state->writer_info, _sound_asset->id(), standard);
+ _asset->fill_writer_info (&_state->writer_info, _asset->id());
}
void
SoundAssetWriter::write (float const * const * data, int frames)
{
DCP_ASSERT (!_finalized);
+ DCP_ASSERT (frames > 0);
+
+ static float const clip = 1.0f - (1.0f / pow (2, 23));
if (!_started) {
- Kumu::Result_t r = _state->mxf_writer.OpenWrite (_file.string().c_str(), _state->writer_info, _state->audio_desc);
+ Kumu::Result_t r = _state->mxf_writer.OpenWrite (_file.string().c_str(), _state->writer_info, _state->desc);
if (ASDCP_FAILURE (r)) {
boost::throw_exception (FileError ("could not open audio MXF for writing", _file.string(), r));
}
- _sound_asset->set_file (_file);
+ _asset->set_file (_file);
_started = true;
}
+ int const ch = _asset->channels ();
+
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);
+ for (int j = 0; j < ch; ++j) {
+ /* Convert sample to 24-bit int, clipping if necessary. */
+ float x = data[j][i];
+ if (x > clip) {
+ x = clip;
+ } else if (x < -clip) {
+ x = -clip;
+ }
+ int32_t const s = x * (1 << 23);
*out++ = (s & 0xff);
*out++ = (s & 0xff00) >> 8;
*out++ = (s & 0xff0000) >> 16;
}
- _frame_buffer_offset += 3 * _sound_asset->channels();
+ _frame_buffer_offset += 3 * ch;
DCP_ASSERT (_frame_buffer_offset <= int (_state->frame_buffer.Capacity()));
void
SoundAssetWriter::write_current_frame ()
{
- ASDCP::Result_t const r = _state->mxf_writer.WriteFrame (_state->frame_buffer, _encryption_context, 0);
+ ASDCP::Result_t const r = _state->mxf_writer.WriteFrame (_state->frame_buffer, _crypto_context->context(), _crypto_context->hmac());
if (ASDCP_FAILURE (r)) {
boost::throw_exception (MiscError (String::compose ("could not write audio MXF frame (%1)", int (r))));
}
++_frames_written;
}
-void
+bool
SoundAssetWriter::finalize ()
{
if (_frame_buffer_offset > 0) {
write_current_frame ();
}
- if (_started && ASDCP_FAILURE (_state->mxf_writer.Finalize())) {
- boost::throw_exception (MiscError ("could not finalise audio MXF"));
+ if (_started) {
+ ASDCP::Result_t const r = _state->mxf_writer.Finalize();
+ if (ASDCP_FAILURE(r)) {
+ boost::throw_exception (MiscError (String::compose ("could not finalise audio MXF (%1)", int(r))));
+ }
}
- _sound_asset->_intrinsic_duration = _frames_written;
- AssetWriter::finalize ();
+ _asset->_intrinsic_duration = _frames_written;
+ return AssetWriter::finalize ();
}
projects / libdcp.git / blobdiff