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src/online/online-tcp-source.h
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// online/online-tcp-source.h
// Copyright 2013 Polish-Japanese Institute of Information Technology (author: Danijel Korzinek)
// 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_ONLINE_ONLINE_TCP_SOURCE_H_
#define KALDI_ONLINE_ONLINE_TCP_SOURCE_H_
#if !defined(_MSC_VER)
#include "online-audio-source.h"
#include "matrix/kaldi-vector.h"
namespace kaldi {
/*
* This class implements a VectorSource that reads audio data in a special format from a socket descriptor.
*
* The documentation and "interface" for this class is given in online-audio-source.h
*/
class OnlineTcpVectorSource : public OnlineAudioSourceItf {
public:
OnlineTcpVectorSource(int32 socket);
~OnlineTcpVectorSource();
// Implementation of the OnlineAudioSourceItf
bool Read(Vector<BaseFloat> *data);
//returns if the socket is still connected
bool IsConnected();
//returns the number of samples read since the last reset
size_t SamplesProcessed();
//resets the number of samples
void ResetSamples();
private:
int32 socket_desc;
bool connected;
char* pack;
int32 pack_size;
char* frame;
int32 frame_size;
int32 last_pack_size, last_pack_rem;
size_t samples_processed;
//runs the built-in "read" method as many times as needed to fill "buf" with "len" bytes
bool ReadFull(char* buf, int32 len);
//gets the next packet of bytes and returns its size
int32 GetNextPack();
//runs "getNextPack" enough times to fill the frame with "size" bytes
int32 FillFrame(int32 size);
KALDI_DISALLOW_COPY_AND_ASSIGN(OnlineTcpVectorSource);
};
} // namespace kaldi
#endif // !defined(_MSC_VER)
#endif // KALDI_ONLINE_ONLINE_TCP_SOURCE_H_
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