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src/onlinebin/online-net-client.cc
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// onlinebin/online-net-client.cc
// Copyright 2012 Cisco Systems (author: Matthias Paulik)
// Modifications to the original contribution by Cisco Systems made by:
// Vassil Panayotov
// 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.
#include <netdb.h>
#include <fcntl.h>
#include "feat/feature-mfcc.h"
#include "online/online-audio-source.h"
#include "online/online-feat-input.h"
int main(int argc, char *argv[]) {
try {
using namespace kaldi;
typedef kaldi::int32 int32;
typedef OnlineFeInput<Mfcc> FeInput;
// Time out interval for the PortAudio source
const int32 kTimeout = 500; // half second
// PortAudio sampling rate
const int32 kSampleFreq = 16000;
// PortAudio's internal ring buffer size in bytes
const int32 kPaRingSize = 32768;
// Report interval for PortAudio buffer overflows in number of feat. batches
const int32 kPaReportInt = 4;
const char *usage =
"Takes input using a microphone(PortAudio), extracts features and sends them
"
"to a speech recognition server over a network connection
"
"Usage: online-net-client server-address server-port
";
ParseOptions po(usage);
int32 batch_size = 27;
po.Register("batch-size", &batch_size,
"The number of feature vectors to be extracted and sent in one go");
po.Read(argc, argv);
if (po.NumArgs() != 2) {
po.PrintUsage();
return 1;
}
std::string server_addr_str = po.GetArg(1);
std::string server_port_str = po.GetArg(2);
addrinfo *server_addr, hints;
hints.ai_family = AF_INET;
hints.ai_protocol = IPPROTO_UDP;
hints.ai_socktype = SOCK_DGRAM;
hints.ai_flags = AI_ADDRCONFIG;
if (getaddrinfo(server_addr_str.c_str(), server_port_str.c_str(),
&hints, &server_addr) != 0)
KALDI_ERR << "getaddrinfo() call failed!";
int32 sock_desc = socket(server_addr->ai_family,
server_addr->ai_socktype,
server_addr->ai_protocol);
if (sock_desc == -1)
KALDI_ERR << "socket() call failed!";
int32 flags = fcntl(sock_desc, F_GETFL);
flags |= O_NONBLOCK;
if (fcntl(sock_desc, F_SETFL, flags) == -1)
KALDI_ERR << "fcntl() failed to put the socket in non-blocking mode!";
// We are not properly registering/exposing MFCC and frame extraction options,
// because there are parts of the online decoding code, where some of these
// options are hardwired(ToDo: we should fix this at some point)
MfccOptions mfcc_opts;
mfcc_opts.use_energy = false;
int32 frame_length = mfcc_opts.frame_opts.frame_length_ms = 25;
int32 frame_shift = mfcc_opts.frame_opts.frame_shift_ms = 10;
OnlinePaSource au_src(kTimeout, kSampleFreq, kPaRingSize, kPaReportInt);
Mfcc mfcc(mfcc_opts);
FeInput fe_input(&au_src, &mfcc,
frame_length * (kSampleFreq / 1000),
frame_shift * (kSampleFreq / 1000));
std::cerr << std::endl << "Sending features to " << server_addr_str
<< ':' << server_port_str << " ... " << std::endl;
char buf[65535];
Matrix<BaseFloat> feats;
while (1) {
feats.Resize(batch_size, mfcc_opts.num_ceps, kUndefined);
bool more_feats = fe_input.Compute(&feats);
if (feats.NumRows() > 0) {
std::stringstream ss;
feats.Write(ss, true); // serialize features as binary data
ssize_t sent = sendto(sock_desc,
ss.str().c_str(),
ss.str().size(), 0,
server_addr->ai_addr,
server_addr->ai_addrlen);
if (sent == -1)
KALDI_ERR << "sendto() call failed!";
ssize_t rcvd = recvfrom(sock_desc, buf, sizeof(buf), 0,
server_addr->ai_addr, &server_addr->ai_addrlen);
if (rcvd == -1 && errno != EWOULDBLOCK && errno != EAGAIN) {
KALDI_ERR << "recvfrom() failed unexpectedly!";
} else if (rcvd > 0) {
buf[rcvd] = 0;
std::cout << buf;
std::cout.flush();
}
}
if (!more_feats) break;
}
freeaddrinfo(server_addr);
return 0;
} catch(const std::exception& e) {
std::cerr << e.what();
return -1;
}
} // main()
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