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/* SPDX-License-Identifier: GPL-2.0-or-later
* Copyright 2016 Kévin Dietrich. All rights reserved. */
/** \file
* \ingroup balembic
*/
#include "abc_reader_archive.h"
#include "Alembic/AbcCoreLayer/Read.h"
#include "BKE_main.h"
#include "BLI_path_util.h"
#include "BLI_string.h"
#ifdef WIN32
# include "utfconv.h"
#endif
#include <fstream>
using Alembic::Abc::ErrorHandler;
using Alembic::Abc::Exception;
using Alembic::Abc::IArchive;
using Alembic::Abc::kWrapExisting;
namespace blender::io::alembic {
static IArchive open_archive(const std::string &filename,
const std::vector<std::istream *> &input_streams)
{
try {
Alembic::AbcCoreOgawa::ReadArchive archive_reader(input_streams);
return IArchive(archive_reader(filename), kWrapExisting, ErrorHandler::kThrowPolicy);
}
catch (const Exception &e) {
std::cerr << e.what() << '\n';
/* Inspect the file to see whether it's actually a HDF5 file. */
char header[4]; /* char(0x89) + "HDF" */
std::ifstream the_file(filename.c_str(), std::ios::in | std::ios::binary);
if (!the_file) {
std::cerr << "Unable to open " << filename << std::endl;
}
else if (!the_file.read(header, sizeof(header))) {
std::cerr << "Unable to read from " << filename << std::endl;
}
else if (strncmp(header + 1, "HDF", 3) != 0) {
std::cerr << filename << " has an unknown file format, unable to read." << std::endl;
}
else {
std::cerr << filename << " is in the obsolete HDF5 format, unable to read." << std::endl;
}
if (the_file.is_open()) {
the_file.close();
}
}
return IArchive();
}
ArchiveReader *ArchiveReader::get(struct Main *bmain, const std::vector<const char *> &filenames)
{
std::vector<ArchiveReader *> readers;
for (const char *filename : filenames) {
ArchiveReader *reader = new ArchiveReader(bmain, filename);
if (!reader->valid()) {
delete reader;
continue;
}
readers.push_back(reader);
}
if (readers.empty()) {
return nullptr;
}
if (readers.size() == 1) {
return readers[0];
}
return new ArchiveReader(readers);
}
ArchiveReader::ArchiveReader(const std::vector<ArchiveReader *> &readers) : m_readers(readers)
{
Alembic::AbcCoreLayer::ArchiveReaderPtrs archives;
for (ArchiveReader *reader : readers) {
archives.push_back(reader->m_archive.getPtr());
}
Alembic::AbcCoreLayer::ReadArchive layer;
Alembic::AbcCoreAbstract::ArchiveReaderPtr arPtr = layer(archives);
m_archive = IArchive(arPtr, kWrapExisting, ErrorHandler::kThrowPolicy);
}
ArchiveReader::ArchiveReader(struct Main *bmain, const char *filename)
{
char abs_filename[FILE_MAX];
BLI_strncpy(abs_filename, filename, FILE_MAX);
BLI_path_abs(abs_filename, BKE_main_blendfile_path(bmain));
#ifdef WIN32
UTF16_ENCODE(abs_filename);
std::wstring wstr(abs_filename_16);
m_infile.open(wstr.c_str(), std::ios::in | std::ios::binary);
UTF16_UN_ENCODE(abs_filename);
#else
m_infile.open(abs_filename, std::ios::in | std::ios::binary);
#endif
m_streams.push_back(&m_infile);
m_archive = open_archive(abs_filename, m_streams);
}
ArchiveReader::~ArchiveReader()
{
for (ArchiveReader *reader : m_readers) {
delete reader;
}
}
bool ArchiveReader::valid() const
{
return m_archive.valid();
}
Alembic::Abc::IObject ArchiveReader::getTop()
{
return m_archive.getTop();
}
} // namespace blender::io::alembic
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