chain-datastruct.h
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// chain/chain-datastruct.h
// Copyright 2015 Johns Hopkins University (author: Daniel Povey)
// See ../../COPYING for clarification regarding multiple 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
//
// THIS CODE IS PROVIDED *AS IS* BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
// KIND, EITHER EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION ANY IMPLIED
// WARRANTIES OR CONDITIONS OF TITLE, FITNESS FOR A PARTICULAR PURPOSE,
// MERCHANTABLITY OR NON-INFRINGEMENT.
// See the Apache 2 License for the specific language governing permissions and
// limitations under the License.
#ifndef KALDI_CHAIN_CHAIN_DATASTRUCT_H_
#define KALDI_CHAIN_CHAIN_DATASTRUCT_H_
#include "cudamatrix/cu-matrixdim.h" // for CU1DBLOCK and CU2DBLOCK, and int32_cuda
/**
This header is for declaring "C" structures that are to be used in the
CUDA interface for things in this directory. We put it in a separate header from
the CUDA stuff as it may be needed regardless of whether we're actually compiling with
CUDA.
*/
extern "C" {
// "C" version of the BaseFloat typedef-- this saves us having to write
// multiple versions of these kernels.
#if (KALDI_DOUBLEPRECISION != 0)
typedef double BaseFloat;
#else
typedef float BaseFloat;
#endif
struct DenominatorGraphTransition {
BaseFloat transition_prob; // language-model part of the probability (not
// in log)
int32_cuda pdf_id; // pdf-id on the transition.
int32_cuda hmm_state; // source, or destination, HMM state.
};
// Search for this in chain-kernels.cu for an explanation.
enum { kThresholdingPowerOfTwo = 14 };
}
#endif