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
|
// Copyright (C) 2005 Open Source Telecom Corp.
//
// This program is free software; you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation; either version 2 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
#include "engine.h"
using namespace ost;
using namespace std;
StreamingBuffer *StreamingBuffer::first = NULL;
StreamingBuffer::StreamingBuffer(const char *tag, timeout_t size, Rate r)
{
id = tag;
next = first;
first = this;
position = 0;
count = (size * ((unsigned long)r)) / 1000;
data = new Sample[count];
memset(data, 0, sizeof(Sample) * count);
}
StreamingBuffer::~StreamingBuffer()
{
cleanup();
}
void StreamingBuffer::cleanup(void)
{
if(data)
{
delete[] data;
data = NULL;
}
}
StreamingBuffer *StreamingBuffer::get(const char *id, Rate rate)
{
StreamingBuffer *node = first;
while(node)
{
if(!stricmp(id, node->id) && rate == node->rate)
return node;
node = node->next;
}
return NULL;
}
bool StreamingBuffer::isActive(void)
{
return true;
}
Audio::Linear StreamingBuffer::getBuffer(unsigned long *pos, timeout_t duration)
{
unsigned long copy = ((duration * rate) / 1000);
Linear target = &data[*pos];
if(count % copy)
return NULL;
*pos += copy;
return target;
}
unsigned long StreamingBuffer::getPosition(timeout_t framing)
{
timeout_t past = 120;
if(framing == 50)
past = 150;
return (position - ((past * rate) / 1000l)) % count;
}
Audio::Linear StreamingBuffer::putBuffer(timeout_t duration)
{
unsigned long copy = (duration * rate) / 1000l;
Linear target = &data[position];
if(count % copy)
return NULL;
position += copy;
return target;
}
void StreamingBuffer::clearBuffer(timeout_t duration)
{
unsigned long copy = (duration * rate) / 1000l;
Linear target = &data[position];
if(count % copy)
return;
position += copy;
while(copy--)
*(target++) = 0;
}
|
