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/*
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.
*/
/** @file src/sound_asset.cc
* @brief An asset made up of WAV files
*/
#include <iostream>
#include <stdexcept>
#include <boost/filesystem.hpp>
#include "AS_DCP.h"
#include "sound_asset.h"
#include "util.h"
#include "exceptions.h"
using namespace std;
using namespace boost;
using namespace libdcp;
SoundAsset::SoundAsset (
vector<string> const & files, string mxf_path, sigc::signal1<void, float>* progress, int fps, int length
)
: Asset (mxf_path, progress, fps, length)
, _channels (files.size ())
{
construct (sigc::bind (sigc::mem_fun (*this, &SoundAsset::path_from_channel), files));
}
SoundAsset::SoundAsset (
sigc::slot<string, Channel> get_path, string mxf_path, sigc::signal1<void, float>* progress, int fps, int length, int channels
)
: Asset (mxf_path, progress, fps, length)
, _channels (channels)
{
construct (get_path);
}
string
SoundAsset::path_from_channel (Channel channel, vector<string> const & files)
{
unsigned int const c = int (channel);
assert (c < files.size ());
return files[c];
}
void
SoundAsset::construct (sigc::slot<string, Channel> get_path)
{
ASDCP::Rational asdcp_fps (_fps, 1);
ASDCP::PCM::WAVParser pcm_parser_channel[_channels];
if (pcm_parser_channel[0].OpenRead (get_path(LEFT).c_str(), asdcp_fps)) {
throw FileError ("could not open WAV file for reading", get_path(LEFT));
}
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 * _channels;
Channel channels[] = {
LEFT,
RIGHT,
CENTRE,
LFE,
LS,
RS
};
ASDCP::PCM::FrameBuffer frame_buffer_channel[_channels];
ASDCP::PCM::AudioDescriptor audio_desc_channel[_channels];
for (int i = 0; i < _channels; ++i) {
string const path = get_path (channels[i]);
if (ASDCP_FAILURE (pcm_parser_channel[i].OpenRead (path.c_str(), asdcp_fps))) {
throw FileError ("could not open WAV file for reading", path);
}
pcm_parser_channel[i].FillAudioDescriptor (audio_desc_channel[i]);
frame_buffer_channel[i].Capacity (ASDCP::PCM::CalcFrameBufferSize (audio_desc_channel[i]));
audio_desc.ChannelCount += audio_desc_channel[i].ChannelCount;
audio_desc.BlockAlign += audio_desc_channel[i].BlockAlign;
}
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 FileError ("could not open audio MXF for writing", _mxf_path);
}
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 (int j = 0; j < _channels; ++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 MiscError ("could not read audio frame");
}
if (frame_buffer_channel[j].Size() != frame_buffer_channel[j].Capacity()) {
throw MiscError ("short audio frame");
}
}
while (data_s < data_e) {
for (int j = 0; j < _channels; ++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 MiscError ("could not write audio MXF frame");
}
(*_progress) (0.5 * float (i) / _length);
}
if (ASDCP_FAILURE (mxf_writer.Finalize())) {
throw MiscError ("could not finalise audio MXF");
}
_digest = make_digest (_mxf_path, _progress);
}
void
SoundAsset::write_to_cpl (ostream& s) const
{
s << " <MainSound>\n"
<< " <Id>urn:uuid:" << _uuid << "</Id>\n"
#if BOOST_FILESYSTEM_VERSION == 3
<< " <AnnotationText>" << filesystem::path(_mxf_path).filename().string() << "</AnnotationText>\n"
#else
<< " <AnnotationText>" << filesystem::path(_mxf_path).filename() << "</AnnotationText>\n"
#endif
<< " <EditRate>" << _fps << " 1</EditRate>\n"
<< " <IntrinsicDuration>" << _length << "</IntrinsicDuration>\n"
<< " <EntryPoint>0</EntryPoint>\n"
<< " <Duration>" << _length << "</Duration>\n"
<< " </MainSound>\n";
}
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