1 /*******************************************************************************
2 * Copyright 2009-2016 Jörg Müller
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 ******************************************************************************/
16
17 #include "sequence/DoubleReader.h"
18
19 #include <cstring>
20
21 AUD_NAMESPACE_BEGIN
22
DoubleReader(std::shared_ptr<IReader> reader1,std::shared_ptr<IReader> reader2)23 DoubleReader::DoubleReader(std::shared_ptr<IReader> reader1, std::shared_ptr<IReader> reader2) :
24 m_reader1(reader1), m_reader2(reader2), m_finished1(false)
25 {
26 Specs s1, s2;
27 s1 = reader1->getSpecs();
28 s2 = reader2->getSpecs();
29 }
30
~DoubleReader()31 DoubleReader::~DoubleReader()
32 {
33 }
34
isSeekable() const35 bool DoubleReader::isSeekable() const
36 {
37 return m_reader1->isSeekable() && m_reader2->isSeekable();
38 }
39
seek(int position)40 void DoubleReader::seek(int position)
41 {
42 m_reader1->seek(position);
43
44 int pos1 = m_reader1->getPosition();
45
46 if((m_finished1 = (pos1 < position)))
47 m_reader2->seek(position - pos1);
48 else
49 m_reader2->seek(0);
50 }
51
getLength() const52 int DoubleReader::getLength() const
53 {
54 int len1 = m_reader1->getLength();
55 int len2 = m_reader2->getLength();
56 if(len1 < 0 || len2 < 0)
57 return -1;
58 return len1 + len2;
59 }
60
getPosition() const61 int DoubleReader::getPosition() const
62 {
63 return m_reader1->getPosition() + m_reader2->getPosition();
64 }
65
getSpecs() const66 Specs DoubleReader::getSpecs() const
67 {
68 return m_finished1 ? m_reader1->getSpecs() : m_reader2->getSpecs();
69 }
70
read(int & length,bool & eos,sample_t * buffer)71 void DoubleReader::read(int& length, bool& eos, sample_t* buffer)
72 {
73 eos = false;
74
75 if(!m_finished1)
76 {
77 int len = length;
78
79 m_reader1->read(len, m_finished1, buffer);
80
81 if(len < length)
82 {
83 Specs specs1, specs2;
84 specs1 = m_reader1->getSpecs();
85 specs2 = m_reader2->getSpecs();
86 if(AUD_COMPARE_SPECS(specs1, specs2))
87 {
88 int len2 = length - len;
89 m_reader2->read(len2, eos, buffer + specs1.channels * len);
90 length = len + len2;
91 }
92 else
93 length = len;
94 }
95 }
96 else
97 {
98 m_reader2->read(length, eos, buffer);
99 }
100 }
101
102 AUD_NAMESPACE_END
103