ExtendedHeaderReader::readPadding() - Code Metrics - Inspection of "Renamed handlers to readers" - GravityMedia/Metadata - Measure and Improve Code Quality continuously with Scrutinizer

Completed

Push — id3-metadata-objects ( e37014...ee91c4 )

by Daniel

created 2016-05-13 16:05 UTC

ExtendedHeaderReader::readPadding() A

↳ Parent: ExtendedHeaderReader

Complexity

Conditions	2
Paths	2

Size

Total Lines	10
Code Lines	5

Duplication

Lines	0
Ratio	0 %

Code Coverage

Tests	0
CRAP Score	6

Importance

Changes	2
Bugs	0	Features	0

Metric	Value
c	2
b	0
f	0
dl	0
loc	10
ccs	0
cts	5
cp	0
rs	9.4285
cc	2
eloc	5
nc	2
nop	0
crap	6

<?php
/**
 * This file is part of the Metadata package.
 *
 * @author Daniel Schröder <[email protected]>
 */

namespace GravityMedia\Metadata\ID3v2\Reader;

use GravityMedia\Metadata\ID3v2\Flag\ExtendedHeaderFlag;
use GravityMedia\Metadata\ID3v2\Restriction;
use GravityMedia\Metadata\ID3v2\Version;

/**
 * ID3v2 extended header reader class.
 *
 * @package GravityMedia\Metadata\ID3v2\Reader
 */
class ExtendedHeaderReader extends AbstractReader
{
    /**
     * @var int
     */
    private $padding;

    /**
     * @var int
     */
    private $crc32;

    /**
     * @var int[]
     */
    private $restrictions;

    /**
     * Read ID3v2 extended header size.
     *
     * @return int
     */
    protected function readSize()
    {
        $this->getStream()->seek($this->getOffset());

        $value = $this->getStream()->readUInt32();

        if (Version::VERSION_23 === $this->getVersion()) {
            return $value;
        }

        return $this->getSynchsafeIntegerFilter()->decode($value);
    }

    /**
     * Read ID3v2 extended header flags.
     *
     * @return bool[]
     */
    public function readFlags()
    {
        if (Version::VERSION_23 === $this->getVersion()) {
            $this->getStream()->seek($this->getOffset() + 4);

            $flags = $this->getStream()->readUInt16();

            return [
                ExtendedHeaderFlag::FLAG_CRC_DATA_PRESENT => (bool)($flags & 0x8000)
            ];
        }

        $this->getStream()->seek($this->getOffset() + 5);

        $flags = $this->getStream()->readUInt8();

        return [
            ExtendedHeaderFlag::FLAG_TAG_IS_AN_UPDATE => (bool)($flags & 0x40),
            ExtendedHeaderFlag::FLAG_CRC_DATA_PRESENT => (bool)($flags & 0x20),
            ExtendedHeaderFlag::FLAG_TAG_RESTRICTIONS => (bool)($flags & 0x10)
        ];
    }

    /**
     * Read ID3v2 extended header padding.
     *
     * @return int
     */
    protected function readPadding()
    {
        if (Version::VERSION_24 === $this->getVersion()) {
            return 0;
        }

        $this->getStream()->seek($this->getOffset() + 6);

        return $this->getStream()->readUInt32();
    }

    /**
     * Get ID3v2 extended header padding.
     *
     * @return int
     */
    public function getPadding()
    {
        if (null === $this->padding) {
            $this->padding = $this->readPadding();
        }

        return $this->padding;
    }

    /**
     * Read ID3v2 extended header CRC-32 data.
     *
     * @return int
     */
    protected function readCrc32()
    {
        if (!$this->isFlagEnabled(ExtendedHeaderFlag::FLAG_CRC_DATA_PRESENT)) {
            return 0;
        }

        if (Version::VERSION_23 === $this->getVersion()) {

            $this->getStream()->seek($this->getOffset() + 10);

            return $this->getStream()->readUInt32();
        }

        $offset = 7;
        if ($this->isFlagEnabled(ExtendedHeaderFlag::FLAG_TAG_IS_AN_UPDATE)) {
            $offset += 1;
        }

        $this->getStream()->seek($this->getOffset() + $offset);

        return $this->getStream()->readUInt8() * 0x10000000 +
        $this->getSynchsafeIntegerFilter()->decode($this->getStream()->readUInt32());
    }

    /**
     * Get ID3v2 extended header CRC-32 data.
     *
     * @return int
     */
    public function getCrc32()
    {
        if (null === $this->crc32) {
            $this->crc32 = $this->readCrc32();
        }

        return $this->crc32;
    }

    /**
     * Read ID3v2 extended header restrictions.
     *
     * @return int[]
     */
    protected function readRestrictions()
    {
        if (!$this->isFlagEnabled(ExtendedHeaderFlag::FLAG_TAG_RESTRICTIONS)) {
            return [];
        }

        $offset = 6;
        if ($this->isFlagEnabled(ExtendedHeaderFlag::FLAG_TAG_IS_AN_UPDATE)) {
            $offset += 1;
        }
        if ($this->isFlagEnabled(ExtendedHeaderFlag::FLAG_CRC_DATA_PRESENT)) {
            $offset += 6;
        }

        $this->getStream()->seek($this->getOffset() + $offset);

        $restrictions = $this->getStream()->readUInt8();

        return [
            Restriction::RESTRICTION_TAG_SIZE => ($restrictions & 0xc0) >> 6,
            Restriction::RESTRICTION_TEXT_ENCODING => ($restrictions & 0x20) >> 5,
            Restriction::RESTRICTION_TEXT_FIELDS_SIZE => ($restrictions & 0x18) >> 3,
            Restriction::RESTRICTION_IMAGE_ENCODING => ($restrictions & 0x04) >> 2,
            Restriction::RESTRICTION_IMAGE_SIZE => ($restrictions & 0x03) >> 0
        ];
    }

    /**
     * Get ID3v2 extended header restrictions.
     *
     * @return int[]
     */
    public function getRestrictions()
    {
        if (null === $this->restrictions) {
            $this->restrictions = $this->readRestrictions();
        }

        return $this->restrictions;
    }
}


1		<?php
2		/**
3		* This file is part of the Metadata package.
4		*
5		* @author Daniel Schröder <[email protected]>
6		*/
7
8		namespace GravityMedia\Metadata\ID3v2\Reader;
9
10		use GravityMedia\Metadata\ID3v2\Flag\ExtendedHeaderFlag;
11		use GravityMedia\Metadata\ID3v2\Restriction;
12		use GravityMedia\Metadata\ID3v2\Version;
13
14		/**
15		* ID3v2 extended header reader class.
16		*
17		* @package GravityMedia\Metadata\ID3v2\Reader
18		*/
19		class ExtendedHeaderReader extends AbstractReader
20		{
21		/**
22		* @var int
23		*/
24		private $padding;
25
26		/**
27		* @var int
28		*/
29		private $crc32;
30
31		/**
32		* @var int[]
33		*/
34		private $restrictions;
35
36		/**
37		* Read ID3v2 extended header size.
38		*
39		* @return int
40		*/
41		protected function readSize()
42		{
43		$this->getStream()->seek($this->getOffset());
44
45		$value = $this->getStream()->readUInt32();
46
47		if (Version::VERSION_23 === $this->getVersion()) {
48		return $value;
49		}
50
51		return $this->getSynchsafeIntegerFilter()->decode($value);
52		}
53
54		/**
55		* Read ID3v2 extended header flags.
56		*
57		* @return bool[]
58		*/
59		public function readFlags()
60		{
61		if (Version::VERSION_23 === $this->getVersion()) {
62		$this->getStream()->seek($this->getOffset() + 4);
63
64		$flags = $this->getStream()->readUInt16();
65
66		return [
67		ExtendedHeaderFlag::FLAG_CRC_DATA_PRESENT => (bool)($flags & 0x8000)
68		];
69		}
70
71		$this->getStream()->seek($this->getOffset() + 5);
72
73		$flags = $this->getStream()->readUInt8();
74
75		return [
76		ExtendedHeaderFlag::FLAG_TAG_IS_AN_UPDATE => (bool)($flags & 0x40),
77		ExtendedHeaderFlag::FLAG_CRC_DATA_PRESENT => (bool)($flags & 0x20),
78		ExtendedHeaderFlag::FLAG_TAG_RESTRICTIONS => (bool)($flags & 0x10)
79		];
80		}
81
82		/**
83		* Read ID3v2 extended header padding.
84		*
85		* @return int
86		*/
87		protected function readPadding()
88		{
89		if (Version::VERSION_24 === $this->getVersion()) {
90		return 0;
91		}
92
93		$this->getStream()->seek($this->getOffset() + 6);
94
95		return $this->getStream()->readUInt32();
96		}
97
98		/**
99		* Get ID3v2 extended header padding.
100		*
101		* @return int
102		*/
103		public function getPadding()
104		{
105		if (null === $this->padding) {
106		$this->padding = $this->readPadding();
107		}
108
109		return $this->padding;
110		}
111
112		/**
113		* Read ID3v2 extended header CRC-32 data.
114		*
115		* @return int
116		*/
117		protected function readCrc32()
118		{
119		if (!$this->isFlagEnabled(ExtendedHeaderFlag::FLAG_CRC_DATA_PRESENT)) {
120		return 0;
121		}
122
123	View Code Duplication	if (Version::VERSION_23 === $this->getVersion()) {
		0 ignored issues – show Duplication introduced 2016-05-12 16:17 UTC by Report Bug Copy Issue Report This code seems to be duplicated across your project. Duplicated code is one of the most pungent code smells. If you need to duplicate the same code in three or more different places, we strongly encourage you to look into extracting the code into a single class or operation. You can also find more detailed suggestions in the “Code” section of your repository. Loading history...
124		$this->getStream()->seek($this->getOffset() + 10);
125
126		return $this->getStream()->readUInt32();
127		}
128
129		$offset = 7;
130		if ($this->isFlagEnabled(ExtendedHeaderFlag::FLAG_TAG_IS_AN_UPDATE)) {
131		$offset += 1;
132		}
133
134		$this->getStream()->seek($this->getOffset() + $offset);
135
136		return $this->getStream()->readUInt8() * 0x10000000 +
137		$this->getSynchsafeIntegerFilter()->decode($this->getStream()->readUInt32());
138		}
139
140		/**
141		* Get ID3v2 extended header CRC-32 data.
142		*
143		* @return int
144		*/
145		public function getCrc32()
146		{
147		if (null === $this->crc32) {
148		$this->crc32 = $this->readCrc32();
149		}
150
151		return $this->crc32;
152		}
153
154		/**
155		* Read ID3v2 extended header restrictions.
156		*
157		* @return int[]
158		*/
159		protected function readRestrictions()
160		{
161		if (!$this->isFlagEnabled(ExtendedHeaderFlag::FLAG_TAG_RESTRICTIONS)) {
162		return [];
163		}
164
165		$offset = 6;
166		if ($this->isFlagEnabled(ExtendedHeaderFlag::FLAG_TAG_IS_AN_UPDATE)) {
167		$offset += 1;
168		}
169		if ($this->isFlagEnabled(ExtendedHeaderFlag::FLAG_CRC_DATA_PRESENT)) {
170		$offset += 6;
171		}
172
173		$this->getStream()->seek($this->getOffset() + $offset);
174
175		$restrictions = $this->getStream()->readUInt8();
176
177		return [
178		Restriction::RESTRICTION_TAG_SIZE => ($restrictions & 0xc0) >> 6,
179		Restriction::RESTRICTION_TEXT_ENCODING => ($restrictions & 0x20) >> 5,
180		Restriction::RESTRICTION_TEXT_FIELDS_SIZE => ($restrictions & 0x18) >> 3,
181		Restriction::RESTRICTION_IMAGE_ENCODING => ($restrictions & 0x04) >> 2,
182		Restriction::RESTRICTION_IMAGE_SIZE => ($restrictions & 0x03) >> 0
183		];
184		}
185
186		/**
187		* Get ID3v2 extended header restrictions.
188		*
189		* @return int[]
190		*/
191		public function getRestrictions()
192		{
193		if (null === $this->restrictions) {
194		$this->restrictions = $this->readRestrictions();
195		}
196
197		return $this->restrictions;
198		}
199		}
200

GravityMedia / Metadata

Push — id3-metadata-objects ( e37014...ee91c4 )

ExtendedHeaderReader::readPadding() A

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