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// Copyright 2016 The Draco Authors.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//
#include <cinttypes>
#include <fstream>
#include "draco/compression/decode.h"
#include "draco/core/cycle_timer.h"
#include "draco/io/obj_encoder.h"
#include "draco/io/parser_utils.h"
#include "draco/io/ply_encoder.h"
namespace {
struct Options {
Options();
std::string input;
std::string output;
};
Options::Options() {}
void Usage() {
printf("Usage: draco_decoder [options] -i input\n");
printf("\n");
printf("Main options:\n");
printf(" -h | -? show help.\n");
printf(" -o <output> output file name.\n");
}
int ReturnError(const draco::Status &status) {
printf("Failed to decode the input file %s\n", status.error_msg());
return -1;
}
} // namespace
int main(int argc, char **argv) {
Options options;
const int argc_check = argc - 1;
for (int i = 1; i < argc; ++i) {
if (!strcmp("-h", argv[i]) || !strcmp("-?", argv[i])) {
Usage();
return 0;
} else if (!strcmp("-i", argv[i]) && i < argc_check) {
options.input = argv[++i];
} else if (!strcmp("-o", argv[i]) && i < argc_check) {
options.output = argv[++i];
}
}
if (argc < 3 || options.input.empty()) {
Usage();
return -1;
}
std::ifstream input_file(options.input, std::ios::binary);
if (!input_file) {
printf("Failed opening the input file.\n");
return -1;
}
// Read the file stream into a buffer.
std::streampos file_size = 0;
input_file.seekg(0, std::ios::end);
file_size = input_file.tellg() - file_size;
input_file.seekg(0, std::ios::beg);
std::vector<char> data(file_size);
input_file.read(data.data(), file_size);
if (data.empty()) {
printf("Empty input file.\n");
return -1;
}
// Create a draco decoding buffer. Note that no data is copied in this step.
draco::DecoderBuffer buffer;
buffer.Init(data.data(), data.size());
draco::CycleTimer timer;
// Decode the input data into a geometry.
std::unique_ptr<draco::PointCloud> pc;
draco::Mesh *mesh = nullptr;
auto type_statusor = draco::Decoder::GetEncodedGeometryType(&buffer);
if (!type_statusor.ok()) {
return ReturnError(type_statusor.status());
}
const draco::EncodedGeometryType geom_type = type_statusor.value();
if (geom_type == draco::TRIANGULAR_MESH) {
timer.Start();
draco::Decoder decoder;
auto statusor = decoder.DecodeMeshFromBuffer(&buffer);
if (!statusor.ok()) {
return ReturnError(statusor.status());
}
std::unique_ptr<draco::Mesh> in_mesh = std::move(statusor).value();
timer.Stop();
if (in_mesh) {
mesh = in_mesh.get();
pc = std::move(in_mesh);
}
} else if (geom_type == draco::POINT_CLOUD) {
// Failed to decode it as mesh, so let's try to decode it as a point cloud.
timer.Start();
draco::Decoder decoder;
auto statusor = decoder.DecodePointCloudFromBuffer(&buffer);
if (!statusor.ok()) {
return ReturnError(statusor.status());
}
pc = std::move(statusor).value();
timer.Stop();
}
if (pc == nullptr) {
printf("Failed to decode the input file.\n");
return -1;
}
if (options.output.empty()) {
// Save the output model into a ply file.
options.output = options.input + ".ply";
}
// Save the decoded geometry into a file.
// TODO(fgalligan): Change extension code to look for '.'.
const std::string extension = draco::parser::ToLower(
options.output.size() >= 4
? options.output.substr(options.output.size() - 4)
: options.output);
if (extension == ".obj") {
draco::ObjEncoder obj_encoder;
if (mesh) {
if (!obj_encoder.EncodeToFile(*mesh, options.output)) {
printf("Failed to store the decoded mesh as OBJ.\n");
return -1;
}
} else {
if (!obj_encoder.EncodeToFile(*pc.get(), options.output)) {
printf("Failed to store the decoded point cloud as OBJ.\n");
return -1;
}
}
} else if (extension == ".ply") {
draco::PlyEncoder ply_encoder;
if (mesh) {
if (!ply_encoder.EncodeToFile(*mesh, options.output)) {
printf("Failed to store the decoded mesh as PLY.\n");
return -1;
}
} else {
if (!ply_encoder.EncodeToFile(*pc.get(), options.output)) {
printf("Failed to store the decoded point cloud as PLY.\n");
return -1;
}
}
} else {
printf(
"Invalid extension of the output file. Use either .ply, .obj, or "
".gltf\n");
return -1;
}
printf("Decoded geometry saved to %s (%" PRId64 " ms to decode)\n",
options.output.c_str(), timer.GetInMs());
return 0;
}
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