online-tcp-source.cc
3.46 KB
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
// online/online-tcp-source.cc
// 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.
#if !defined(_MSC_VER)
#include "online-tcp-source.h"
#include <unistd.h>
namespace kaldi {
typedef kaldi::int32 int32;
OnlineTcpVectorSource::OnlineTcpVectorSource(int32 socket)
: socket_desc(socket),
connected(true),
pack_size(512),
frame_size(512),
last_pack_size(0),
last_pack_rem(0),
samples_processed(0) {
pack = new char[pack_size];
frame = new char[frame_size];
}
OnlineTcpVectorSource::~OnlineTcpVectorSource() {
delete[] pack;
delete[] frame;
}
size_t OnlineTcpVectorSource::SamplesProcessed() {
return samples_processed;
}
void OnlineTcpVectorSource::ResetSamples() {
samples_processed = 0;
}
bool OnlineTcpVectorSource::ReadFull(char* buf, int32 len) {
int32 to_read = len;
int32 has_read = 0;
int32 ret;
while (to_read > 0) {
ret = read(socket_desc, buf + has_read, to_read);
if (ret <= 0) {
connected = false;
return false;
}
to_read -= ret;
has_read += ret;
}
return true;
}
int OnlineTcpVectorSource::GetNextPack() {
int32 size = 0;
if (!ReadFull((char*) &size, 4))
return 0;
if (size % 2 != 0) {
KALDI_ERR << "TCPVectorSource: Pack size must be even!";
return 0;
}
if (pack_size < size) {
pack_size = size;
delete[] pack;
pack = new char[pack_size];
}
if (!ReadFull(pack, size))
return 0;
return size;
}
int OnlineTcpVectorSource::FillFrame(int32 get_size) {
int32 frame_offset = 0;
if (last_pack_rem > 0) {
int pack_offset = last_pack_size - last_pack_rem;
int size = last_pack_rem < get_size ? last_pack_rem : get_size;
memcpy(frame, pack + pack_offset, size);
last_pack_rem -= size;
get_size -= size;
frame_offset += size;
}
while (get_size > 0) {
int32 ret = GetNextPack();
if (ret == 0)
return frame_offset;
int32 size = ret < get_size ? ret : get_size;
memcpy(frame + frame_offset, pack, size);
last_pack_size = ret;
last_pack_rem = last_pack_size - size;
get_size -= size;
frame_offset += size;
}
return frame_offset;
}
bool OnlineTcpVectorSource::Read(Vector<BaseFloat> *data) {
if (!connected)
return false;
int32 n_elem = static_cast<uint32>(data->Dim());
int32 n_bytes = n_elem * 2;
if (frame_size < n_bytes) {
frame_size = n_bytes;
delete[] frame;
frame = new char[frame_size];
}
int32 b_read = FillFrame(n_bytes);
int32 n_read = b_read / 2;
short* s_frame = (short*) frame;
for (int32 i = 0; i < n_read; i++)
(*data)(i) = s_frame[i];
samples_processed += n_read;
return (n_read == n_elem);
}
bool OnlineTcpVectorSource::IsConnected() {
return connected;
}
} // namespace kaldi
#endif // !defined(_MSC_VER)