|
1
|
|
|
<?php |
|
2
|
|
|
|
|
3
|
|
|
declare(strict_types=1); |
|
4
|
|
|
|
|
5
|
|
|
namespace Uxmp\Core\Component\Io\Transcoder; |
|
6
|
|
|
|
|
7
|
|
|
use Psr\Log\LoggerInterface; |
|
8
|
|
|
|
|
9
|
|
|
final class TranscodingHandler |
|
10
|
|
|
{ |
|
11
|
|
|
private string $buffer = ''; |
|
12
|
|
|
|
|
13
|
|
|
/** @var null|resource */ |
|
14
|
|
|
private $handle; |
|
15
|
|
|
|
|
16
|
4 |
|
public function __construct( |
|
17
|
|
|
private readonly ?LoggerInterface $logger, |
|
18
|
|
|
private readonly TranscoderInterface $transcoder, |
|
19
|
|
|
) { |
|
20
|
4 |
|
} |
|
21
|
|
|
|
|
22
|
|
|
/** |
|
23
|
|
|
* @param int<0, max> $length |
|
24
|
|
|
*/ |
|
25
|
3 |
|
public function __invoke(int $length): string |
|
26
|
|
|
{ |
|
27
|
3 |
|
$this->logger?->debug(sprintf('request: %d bytes', $length)); |
|
28
|
|
|
|
|
29
|
3 |
|
$chunk = $this->read($length); |
|
30
|
|
|
|
|
31
|
3 |
|
$this->logger?->debug(sprintf('got %d bytes', strlen($chunk))); |
|
32
|
|
|
|
|
33
|
3 |
|
if ($chunk !== '') { |
|
34
|
2 |
|
if (strlen($chunk) < $length) { |
|
35
|
1 |
|
$chunk .= str_repeat("\0", $length - strlen($chunk)); |
|
36
|
|
|
|
|
37
|
1 |
|
$this->logger?->debug('add null values'); |
|
38
|
|
|
} |
|
39
|
|
|
|
|
40
|
2 |
|
return $chunk; |
|
41
|
|
|
} |
|
42
|
|
|
|
|
43
|
|
|
// return only null (if the content length is greater than the actual size) |
|
44
|
1 |
|
return str_repeat("\0", $length); |
|
45
|
|
|
} |
|
46
|
|
|
|
|
47
|
3 |
|
private function read(int $length): string |
|
48
|
|
|
{ |
|
49
|
3 |
|
$result = ''; |
|
50
|
|
|
|
|
51
|
3 |
|
if ($this->handle === null) { |
|
52
|
3 |
|
$this->handle = $this->transcoder->getHandle(); |
|
53
|
|
|
} |
|
54
|
|
|
|
|
55
|
3 |
|
while (strlen($this->buffer) < $length) { |
|
56
|
3 |
|
$chunk = (string) fread($this->handle, $length); |
|
57
|
|
|
|
|
58
|
3 |
|
$this->logger?->debug(sprintf('read %d bytes - got %d', $length, strlen($chunk))); |
|
59
|
|
|
|
|
60
|
3 |
|
if ($chunk === '') { |
|
61
|
2 |
|
$result = $this->buffer; |
|
62
|
|
|
|
|
63
|
2 |
|
$this->buffer = ''; |
|
64
|
2 |
|
break; |
|
65
|
|
|
} |
|
66
|
|
|
|
|
67
|
2 |
|
$this->logger?->debug(sprintf('buffer %d bytes (+%d)', strlen($this->buffer) + strlen($chunk), strlen($chunk))); |
|
68
|
|
|
|
|
69
|
2 |
|
$this->buffer .= $chunk; |
|
70
|
|
|
|
|
71
|
2 |
|
if (strlen($this->buffer) >= $length) { |
|
72
|
1 |
|
$result = substr($this->buffer, 0, $length); |
|
73
|
|
|
|
|
74
|
1 |
|
$this->buffer = substr($this->buffer, $length); |
|
75
|
|
|
|
|
76
|
1 |
|
break; |
|
77
|
|
|
} |
|
78
|
|
|
} |
|
79
|
|
|
|
|
80
|
3 |
|
return $result; |
|
81
|
|
|
} |
|
82
|
|
|
} |
|
83
|
|
|
|
uxmp /
core
