mirror of
https://git.mirrors.martin98.com/https://github.com/google/draco
synced 2025-07-28 04:02:02 +08:00
59b297b18a
Changes: 1. Javascript decoder can now be built separately for meshes and point clouds. Together with other optimizations this results in about 33% smaller Javascript for mesh decoder. (pre-built javascript for meshes and point clouds is included). 2. Fixing bug in our symbol_encoder that resulted in failed encoding for certain cases when there were around 1<<18 symbols. 3. Changing default setting of our draco_encoder app to -cl 7
141 lines
4.4 KiB
C++
141 lines
4.4 KiB
C++
// Copyright 2016 The Draco Authors.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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//
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#include "compression/decode.h"
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#include "compression/config/compression_shared.h"
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#ifdef DRACO_MESH_COMPRESSION_SUPPORTED
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#include "compression/mesh/mesh_edgebreaker_decoder.h"
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#include "compression/mesh/mesh_sequential_decoder.h"
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#endif
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#ifdef DRACO_POINT_CLOUD_COMPRESSION_SUPPORTED
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#include "compression/point_cloud/point_cloud_kd_tree_decoder.h"
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#include "compression/point_cloud/point_cloud_sequential_decoder.h"
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#endif
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namespace draco {
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bool ParseHeader(DecoderBuffer *in_buffer, EncodedGeometryType *out_type,
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int8_t *out_method) {
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char draco_str[6] = {0};
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if (!in_buffer->Decode(draco_str, 5))
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return false;
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if (strcmp(draco_str, "DRACO") != 0)
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return false; // Wrong file format?
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uint8_t major_version, minor_version;
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if (!in_buffer->Decode(&major_version))
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return false;
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if (!in_buffer->Decode(&minor_version))
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return false;
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uint8_t encoder_type, encoder_method;
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if (!in_buffer->Decode(&encoder_type))
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return false;
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if (!in_buffer->Decode(&encoder_method))
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return false;
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uint16_t flags;
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if (!in_buffer->Decode(&flags))
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return false;
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*out_type = static_cast<EncodedGeometryType>(encoder_type);
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*out_method = encoder_method;
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return true;
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}
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EncodedGeometryType GetEncodedGeometryType(DecoderBuffer *in_buffer) {
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DecoderBuffer temp_buffer(*in_buffer);
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EncodedGeometryType geom_type;
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int8_t method;
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if (!ParseHeader(&temp_buffer, &geom_type, &method))
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return INVALID_GEOMETRY_TYPE;
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return geom_type;
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}
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#ifdef DRACO_POINT_CLOUD_COMPRESSION_SUPPORTED
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std::unique_ptr<PointCloudDecoder> CreatePointCloudDecoder(int8_t method) {
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if (method == POINT_CLOUD_SEQUENTIAL_ENCODING) {
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return std::unique_ptr<PointCloudDecoder>(
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new PointCloudSequentialDecoder());
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} else if (method == POINT_CLOUD_KD_TREE_ENCODING) {
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return std::unique_ptr<PointCloudDecoder>(new PointCloudKdTreeDecoder());
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}
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return nullptr;
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}
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#endif
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#ifdef DRACO_MESH_COMPRESSION_SUPPORTED
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std::unique_ptr<MeshDecoder> CreateMeshDecoder(uint8_t method) {
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if (method == MESH_SEQUENTIAL_ENCODING) {
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return std::unique_ptr<MeshDecoder>(new MeshSequentialDecoder());
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} else if (method == MESH_EDGEBREAKER_ENCODING) {
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return std::unique_ptr<MeshDecoder>(new MeshEdgeBreakerDecoder());
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}
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return nullptr;
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}
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#endif
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std::unique_ptr<PointCloud> DecodePointCloudFromBuffer(
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DecoderBuffer *in_buffer) {
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EncodedGeometryType encoder_type;
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int8_t method;
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if (!ParseHeader(in_buffer, &encoder_type, &method))
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return nullptr;
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if (encoder_type == POINT_CLOUD) {
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#ifdef DRACO_POINT_CLOUD_COMPRESSION_SUPPORTED
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std::unique_ptr<PointCloudDecoder> decoder =
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CreatePointCloudDecoder(method);
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if (!decoder)
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return nullptr;
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std::unique_ptr<PointCloud> point_cloud(new PointCloud());
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if (!decoder->Decode(in_buffer, point_cloud.get()))
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return nullptr;
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return point_cloud;
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#endif
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} else if (encoder_type == TRIANGULAR_MESH) {
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#ifdef DRACO_MESH_COMPRESSION_SUPPORTED
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std::unique_ptr<MeshDecoder> decoder = CreateMeshDecoder(method);
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if (!decoder)
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return nullptr;
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std::unique_ptr<Mesh> mesh(new Mesh());
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if (!decoder->Decode(in_buffer, mesh.get()))
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return nullptr;
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return std::move(mesh);
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#endif
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}
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return nullptr;
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}
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std::unique_ptr<Mesh> DecodeMeshFromBuffer(DecoderBuffer *in_buffer) {
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#ifdef DRACO_MESH_COMPRESSION_SUPPORTED
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EncodedGeometryType encoder_type;
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int8_t method;
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if (!ParseHeader(in_buffer, &encoder_type, &method))
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return nullptr;
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std::unique_ptr<MeshDecoder> decoder;
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if (encoder_type == TRIANGULAR_MESH) {
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decoder = CreateMeshDecoder(method);
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}
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if (!decoder)
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return nullptr;
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std::unique_ptr<Mesh> mesh(new Mesh());
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if (!decoder->Decode(in_buffer, mesh.get()))
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return nullptr;
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return mesh;
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#else
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return nullptr;
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#endif
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}
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} // namespace draco
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