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
|
/* ------------------------------------------------------------------
* Copyright (C) 2017 Matthias P. Braendli
*
* 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
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either
* express or implied.
* See the License for the specific language governing permissions
* and limitations under the License.
* -------------------------------------------------------------------
*/
#include "FileInput.h"
#include "wavfile.h"
#include <cstring>
#include <cstdio>
#include <stdexcept>
#include <stdint.h>
using namespace std;
FileInput::~FileInput()
{
// Ensures push() doesn't get blocked
m_queue.clear();
if (m_raw_input and m_in_fh) {
fclose(m_in_fh);
}
else if (m_wav) {
wav_read_close(m_wav);
}
}
void FileInput::prepare(void)
{
const char* fname = m_filename.c_str();
if (m_raw_input) {
if (fname && strcmp(fname, "-")) {
m_in_fh = fopen(fname, "rb");
if (!m_in_fh) {
throw runtime_error("Can't open input file!");
}
}
else {
m_in_fh = stdin;
}
}
else {
int bits_per_sample = 0;
int channels = 0;
int wav_format = 0;
int sample_rate = 0;
m_wav = wav_read_open(fname);
if (!m_wav) {
throw runtime_error("Unable to open wav file " + m_filename);
}
if (!wav_get_header(m_wav, &wav_format, &channels, &sample_rate,
&bits_per_sample, nullptr)) {
throw runtime_error("Bad wav file" + m_filename);
}
if (wav_format != 1) {
throw runtime_error("Unsupported WAV format " + to_string(wav_format));
}
if (bits_per_sample != 16) {
throw runtime_error("Unsupported WAV sample depth " +
to_string(bits_per_sample));
}
if ( !(channels == 1 or channels == 2)) {
throw runtime_error("Unsupported WAV channels " + to_string(channels));
}
if (m_sample_rate != sample_rate) {
throw runtime_error(
"WAV sample rate " +
to_string(sample_rate) +
" doesn't correspond to desired sample rate " +
to_string(m_sample_rate));
}
}
}
bool FileInput::read_source(size_t num_bytes)
{
vector<uint8_t> samplebuf(num_bytes);
ssize_t ret = 0;
if (m_raw_input) {
ret = fread(samplebuf.data(), 1, num_bytes, m_in_fh);
}
else {
ret = wav_read_data(m_wav, samplebuf.data(), num_bytes);
}
if (ret > 0) {
m_queue.push(samplebuf.data(), ret);
}
if (ret < (ssize_t)num_bytes) {
if (m_raw_input) {
if (ferror(m_in_fh)) {
return false;
}
if (feof(m_in_fh)) {
if (m_continue_after_eof) {
clearerr(m_in_fh);
}
else {
return false;
}
}
}
else {
// the wavfile input doesn't support the continuation after EOF
return false;
}
}
return true;
}
|
