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#ifndef CAFFE_DATA_LAYERS_HPP_
#define CAFFE_DATA_LAYERS_HPP_
#include <vector>
#include "caffe/blob.hpp"
#include "caffe/data_transformer.hpp"
#include "caffe/internal_thread.hpp"
#include "caffe/layer.hpp"
#include "caffe/proto/caffe.pb.h"
#include "caffe/util/blocking_queue.hpp"
namespace caffe {
/**
* @brief Provides base for data layers that feed blobs to the Net.
*
* TODO(dox): thorough documentation for Forward and proto params.
*/
template <typename Dtype>
class BaseDataLayer : public Layer<Dtype> {
public:
explicit BaseDataLayer(const LayerParameter& param);
// LayerSetUp: implements common data layer setup functionality, and calls
// DataLayerSetUp to do special data layer setup for individual layer types.
// This method may not be overridden except by the BasePrefetchingDataLayer.
virtual void LayerSetUp(const vector<Blob<Dtype>*>& bottom,
const vector<Blob<Dtype>*>& top);
virtual void DataLayerSetUp(const vector<Blob<Dtype>*>& bottom,
const vector<Blob<Dtype>*>& top) {}
// Data layers have no bottoms, so reshaping is trivial.
virtual void Reshape(const vector<Blob<Dtype>*>& bottom,
const vector<Blob<Dtype>*>& top) {}
virtual void Backward_cpu(const vector<Blob<Dtype>*>& top,
const vector<bool>& propagate_down, const vector<Blob<Dtype>*>& bottom) {}
virtual void Backward_gpu(const vector<Blob<Dtype>*>& top,
const vector<bool>& propagate_down, const vector<Blob<Dtype>*>& bottom) {}
protected:
TransformationParameter transform_param_;
shared_ptr<DataTransformer<Dtype> > data_transformer_;
bool output_labels_;
};
template <typename Dtype>
class Batch {
public:
Blob<Dtype> data_, label_;
};
template <typename Dtype>
class BasePrefetchingDataLayer :
public BaseDataLayer<Dtype>, public InternalThread {
public:
explicit BasePrefetchingDataLayer(const LayerParameter& param);
// LayerSetUp: implements common data layer setup functionality, and calls
// DataLayerSetUp to do special data layer setup for individual layer types.
// This method may not be overridden.
void LayerSetUp(const vector<Blob<Dtype>*>& bottom,
const vector<Blob<Dtype>*>& top);
virtual void Forward_cpu(const vector<Blob<Dtype>*>& bottom,
const vector<Blob<Dtype>*>& top);
virtual void Forward_gpu(const vector<Blob<Dtype>*>& bottom,
const vector<Blob<Dtype>*>& top);
protected:
virtual void InternalThreadEntry();
virtual void load_batch(Batch<Dtype>* batch) = 0;
vector<shared_ptr<Batch<Dtype> > > prefetch_;
BlockingQueue<Batch<Dtype>*> prefetch_free_;
BlockingQueue<Batch<Dtype>*> prefetch_full_;
Batch<Dtype>* prefetch_current_;
Blob<Dtype> transformed_data_;
};
} // namespace caffe
#endif // CAFFE_DATA_LAYERS_HPP_
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