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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.
//
#ifndef DRACO_COMPRESSION_DECODE_H_
#define DRACO_COMPRESSION_DECODE_H_
#include "draco/compression/config/compression_shared.h"
#include "draco/compression/config/decoder_options.h"
#include "draco/core/decoder_buffer.h"
#include "draco/core/status_or.h"
#include "draco/draco_features.h"
#include "draco/mesh/mesh.h"
namespace draco {
// Class responsible for decoding of meshes and point clouds that were
// compressed by a Draco encoder.
class Decoder {
public:
// Returns the geometry type encoded in the input |in_buffer|.
// The return value is one of POINT_CLOUD, MESH or INVALID_GEOMETRY in case
// the input data is invalid.
// The decoded geometry type can be used to choose an appropriate decoding
// function for a given geometry type (see below).
static StatusOr<EncodedGeometryType> GetEncodedGeometryType(
DecoderBuffer *in_buffer);
// Decodes point cloud from the provided buffer. The buffer must be filled
// with data that was encoded with either the EncodePointCloudToBuffer or
// EncodeMeshToBuffer methods in encode.h. In case the input buffer contains
// mesh, the returned instance can be down-casted to Mesh.
StatusOr<std::unique_ptr<PointCloud>> DecodePointCloudFromBuffer(
DecoderBuffer *in_buffer);
// Decodes a triangular mesh from the provided buffer. The mesh must be filled
// with data that was encoded using the EncodeMeshToBuffer method in encode.h.
// The function will return nullptr in case the input is invalid or if it was
// encoded with the EncodePointCloudToBuffer method.
StatusOr<std::unique_ptr<Mesh>> DecodeMeshFromBuffer(
DecoderBuffer *in_buffer);
// Decodes the buffer into a provided geometry. If the geometry is
// incompatible with the encoded data. For example, when |out_geometry| is
// draco::Mesh while the data contains a point cloud, the function will return
// an error status.
Status DecodeBufferToGeometry(DecoderBuffer *in_buffer,
PointCloud *out_geometry);
Status DecodeBufferToGeometry(DecoderBuffer *in_buffer, Mesh *out_geometry);
// When set, the decoder is going to skip attribute transform for a given
// attribute type. For example for quantized attributes, the decoder would
// skip the dequantization step and the returned geometry would contain an
// attribute with quantized values. The attribute would also contain an
// instance of AttributeTransform class that is used to describe the skipped
// transform, including all parameters that are needed to perform the
// transform manually.
void SetSkipAttributeTransform(GeometryAttribute::Type att_type);
// Returns the options instance used by the decoder that can be used by users
// to control the decoding process.
DecoderOptions *options() { return &options_; }
private:
DecoderOptions options_;
};
} // namespace draco
#endif // DRACO_COMPRESSION_DECODE_H_
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