/*
- Copyright (C) 2012-2020 Carl Hetherington <cth@carlh.net>
+ Copyright (C) 2012-2021 Carl Hetherington <cth@carlh.net>
This file is part of libdcp.
files in the program, then also delete it here.
*/
+
+/** @file src/sound_asset_writer.cc
+ * @brief SoundAssetWriter class
+ */
+
+
#include "bitstream.h"
#include "sound_asset_writer.h"
#include "sound_asset.h"
#include "compose.hpp"
#include "crypto_context.h"
#include <asdcp/AS_DCP.h>
+#include <asdcp/Metadata.h>
#include <iostream>
+
using std::min;
using std::max;
using std::cout;
using std::vector;
using namespace dcp;
+
struct SoundAssetWriter::ASDCPState
{
ASDCP::PCM::MXFWriter mxf_writer;
ASDCP::PCM::AudioDescriptor desc;
};
-SoundAssetWriter::SoundAssetWriter (SoundAsset* asset, boost::filesystem::path file, bool sync)
+
+SoundAssetWriter::SoundAssetWriter (SoundAsset* asset, boost::filesystem::path file, vector<Channel> active_channels, bool sync)
: AssetWriter (asset, file)
, _state (new SoundAssetWriter::ASDCPState)
, _asset (asset)
- , _frame_buffer_offset (0)
, _sync (sync)
- , _sync_packet (0)
+ , _active_channels (active_channels)
{
DCP_ASSERT (!_sync || _asset->channels() >= 14);
- DCP_ASSERT (!_sync || _asset->standard() == SMPTE);
+ DCP_ASSERT (!_sync || _asset->standard() == Standard::SMPTE);
/* Derived from ASDCP::Wav::SimpleWaveHeader::FillADesc */
_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.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) {
+ if (asset->standard() == Standard::INTEROP) {
_state->desc.ChannelFormat = ASDCP::PCM::CF_NONE;
} else {
/* Just use WTF ("wild track format") for SMPTE for now; searches suggest that this
}
}
+
+void
+SoundAssetWriter::start ()
+{
+ auto 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));
+ }
+
+ if (_asset->standard() == Standard::SMPTE && !_active_channels.empty()) {
+
+ ASDCP::MXF::WaveAudioDescriptor* essence_descriptor = nullptr;
+ _state->mxf_writer.OP1aHeader().GetMDObjectByType(
+ asdcp_smpte_dict->ul(ASDCP::MDD_WaveAudioDescriptor), reinterpret_cast<ASDCP::MXF::InterchangeObject**>(&essence_descriptor)
+ );
+ DCP_ASSERT (essence_descriptor);
+ essence_descriptor->ChannelAssignment = asdcp_smpte_dict->ul(ASDCP::MDD_DCAudioChannelCfg_MCA);
+
+ auto soundfield = new ASDCP::MXF::SoundfieldGroupLabelSubDescriptor(asdcp_smpte_dict);
+ GenRandomValue (soundfield->MCALinkID);
+ soundfield->RFC5646SpokenLanguage = _asset->language();
+
+ const MCASoundField field = _asset->channels() > 10 ? MCASoundField::SEVEN_POINT_ONE : MCASoundField::FIVE_POINT_ONE;
+
+ if (field == MCASoundField::SEVEN_POINT_ONE) {
+ soundfield->MCATagSymbol = "sg71";
+ soundfield->MCATagName = "7.1DS";
+ soundfield->MCALabelDictionaryID = asdcp_smpte_dict->ul(ASDCP::MDD_DCAudioSoundfield_71);
+ } else {
+ soundfield->MCATagSymbol = "sg51";
+ soundfield->MCATagName = "5.1";
+ soundfield->MCALabelDictionaryID = asdcp_smpte_dict->ul(ASDCP::MDD_DCAudioSoundfield_51);
+ }
+
+ _state->mxf_writer.OP1aHeader().AddChildObject(soundfield);
+ essence_descriptor->SubDescriptors.push_back(soundfield->InstanceUID);
+
+ for (auto i: _active_channels) {
+ auto channel = new ASDCP::MXF::AudioChannelLabelSubDescriptor(asdcp_smpte_dict);
+ GenRandomValue (channel->MCALinkID);
+ channel->SoundfieldGroupLinkID = soundfield->MCALinkID;
+ channel->MCAChannelID = static_cast<int>(i) + 1;
+ channel->MCATagSymbol = "ch" + channel_to_mca_id(i, field);
+ channel->MCATagName = channel_to_mca_name(i, field);
+ channel->RFC5646SpokenLanguage = _asset->language();
+ channel->MCALabelDictionaryID = channel_to_mca_universal_label(i, field, asdcp_smpte_dict);
+ _state->mxf_writer.OP1aHeader().AddChildObject(channel);
+ essence_descriptor->SubDescriptors.push_back(channel->InstanceUID);
+ }
+ }
+
+ _asset->set_file (_file);
+ _started = true;
+}
+
+
void
SoundAssetWriter::write (float const * const * data, int frames)
{
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->desc);
- if (ASDCP_FAILURE (r)) {
- boost::throw_exception (FileError ("could not open audio MXF for writing", _file.string(), r));
- }
-
- _asset->set_file (_file);
- _started = true;
+ start ();
}
int const ch = _asset->channels ();
}
_frame_buffer_offset += 3 * ch;
- DCP_ASSERT (_frame_buffer_offset <= int (_state->frame_buffer.Capacity()));
+ 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())) {
void
SoundAssetWriter::write_current_frame ()
{
- 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))));
+ auto 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)", static_cast<int>(r))));
}
++_frames_written;
}
if (_started) {
- ASDCP::Result_t const r = _state->mxf_writer.Finalize();
+ auto const r = _state->mxf_writer.Finalize();
if (ASDCP_FAILURE(r)) {
- boost::throw_exception (MiscError (String::compose ("could not finalise audio MXF (%1)", int(r))));
+ boost::throw_exception (MiscError(String::compose ("could not finalise audio MXF (%1)", static_cast<int>(r))));
}
}
int remaining_bits = 0;
/* How many packets in this edit unit (i.e. "frame") */
int packets = 0;
- Fraction const edit_rate = _asset->edit_rate ();
+ auto const edit_rate = _asset->edit_rate ();
if (edit_rate == Fraction(24, 1)) {
edit_rate_code = 0;
remaining_bits = 25;
projects / libdcp.git / blobdiff