ExtendedHeaderReader::getInteger16Reader() - Code Metrics - Inspection of "Cleaned up" - GravityMedia/Metadata - Measure and Improve Code Quality continuously with Scrutinizer

Completed

Push — id3-metadata-objects ( a3a88a...ecc500 )

by Daniel

created 2016-05-10 16:03 UTC

ExtendedHeaderReader::getInteger16Reader() A

↳ Parent: ExtendedHeaderReader

Complexity

Conditions	2
Paths	2

Size

Total Lines	9
Code Lines	5

Duplication

Lines	9
Ratio	100 %

Importance

Changes	1
Bugs	0	Features	0

Metric	Value
c	1
b	0
f	0
dl	9
loc	9
rs	9.6666
cc	2
eloc	5
nc	2
nop	0

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

namespace GravityMedia\Metadata\ID3v2\Reader;

use GravityMedia\Metadata\ID3v2\Enum\ExtendedHeaderFlag;
use GravityMedia\Metadata\ID3v2\Enum\Version;
use GravityMedia\Metadata\ID3v2\ExtendedHeader;
use GravityMedia\Metadata\ID3v2\Stream\SynchsafeInteger32Reader;
use GravityMedia\Metadata\ID3v2\ExtendedHeaderInterface;
use GravityMedia\Metadata\ID3v2\HeaderInterface;
use GravityMedia\Stream\Enum\ByteOrder;
use GravityMedia\Stream\Reader\Integer16Reader;
use GravityMedia\Stream\Reader\Integer32Reader;
use GravityMedia\Stream\Reader\Integer8Reader;
use GravityMedia\Stream\StreamInterface;

/**
 * ID3v2 extended header reader
 *
 * @package GravityMedia\Metadata\ID3v2\Reader
 */
class ExtendedHeaderReader
{
    /**
     * @var StreamInterface
     */
    protected $stream;

    /**
     * @var HeaderInterface
     */
    protected $header;

    /**
     * @var Integer8Reader
     */
    protected $integer8Reader;

    /**
     * @var Integer16Reader
     */
    protected $integer16Reader;

    /**
     * @var Integer32Reader
     */
    protected $integer32Reader;

    /**
     * @var SynchsafeInteger32Reader
     */
    protected $synchsafeInteger32Reader;

    /**
     * Create ID3v2 extended header reader.
     *
     * @param StreamInterface $stream
     * @param HeaderInterface $header
     */
    public function __construct(StreamInterface $stream, HeaderInterface $header)
    {
        $this->stream = $stream;
        $this->header = $header;
    }

    /**
     * Get 8-bit integer reader.
     *
     * @return Integer8Reader
     */
    public function getInteger8Reader()
    {
        if (null === $this->integer8Reader) {
            $this->integer8Reader = new Integer8Reader($this->stream);
        }

        return $this->integer8Reader;
    }

    /**
     * Get 16-bit integer reader
     *
     * @return Integer16Reader
     */
    public function getInteger16Reader()

    {
        if (null === $this->integer16Reader) {
            $this->integer16Reader = new Integer16Reader($this->stream);
            $this->integer16Reader->setByteOrder(ByteOrder::BIG_ENDIAN);
        }

        return $this->integer16Reader;
    }

    /**
     * Get 32-bit integer reader
     *
     * @return Integer32Reader
     */
    public function getInteger32Reader()

    {
        if (null === $this->integer32Reader) {
            $this->integer32Reader = new Integer32Reader($this->stream);
            $this->integer32Reader->setByteOrder(ByteOrder::BIG_ENDIAN);
        }

        return $this->integer32Reader;
    }

    /**
     * Get synchsafe 32-bit integer reader
     *
     * @return SynchsafeInteger32Reader
     */
    public function getSynchsafeInteger32Reader()

    {
        if (null === $this->synchsafeInteger32Reader) {
            $this->synchsafeInteger32Reader = new SynchsafeInteger32Reader($this->stream);
            $this->synchsafeInteger32Reader->setByteOrder(ByteOrder::BIG_ENDIAN);
        }

        return $this->synchsafeInteger32Reader;
    }

    /**
     * Read ID3v2 extended header size.
     *
     * @return int
     */
    protected function readSize()
    {
        if (Version::VERSION_23 === $this->header->getVersion()) {
            return $this->getInteger32Reader()->read();
        }

        return $this->getSynchsafeInteger32Reader()->read();
    }

    /**
     * Read ID3v2 extended header flags.
     *
     * @return array
     */
    protected function readFlags()
    {
        if (Version::VERSION_23 === $this->header->getVersion()) {
            $flags = $this->getInteger16Reader()->read();

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

        $this->stream->seek(1, SEEK_CUR);

        $flags = $this->getInteger8Reader()->read();

        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()
    {
        return $this->getInteger32Reader()->read();
    }

    /**
     * Read ID3v2 extended header CRC-32 data.
     *
     * @return int
     */
    protected function readCrc32()
    {
        if (Version::VERSION_23 === $this->header->getVersion()) {
            return $this->getInteger32Reader()->read();
        }

        $this->stream->seek(1, SEEK_CUR);

        return $this->getInteger8Reader()->read() * (0xfffffff + 1) + $this->getSynchsafeInteger32Reader()->read();
    }

    /**
     * Read ID3v2 extended header restrictions.
     *
     * @return int
     */
    protected function readRestrictions()
    {
        $this->stream->seek(1, SEEK_CUR);

        return $this->getInteger8Reader()->read();
    }

    /**
     * Read ID3v2 extended header.
     *
     * @return ExtendedHeaderInterface
     */
    public function read()
    {
        $extendedHeader = new ExtendedHeader();
        $extendedHeader
            ->setSize($this->readSize())
            ->setFlags($this->readFlags());

        // Only in ID3v2.3
        if (Version::VERSION_23 === $this->header->getVersion()) {
            $extendedHeader->setPadding($this->readPadding());
        }

        // Only in ID3v2.3
        if ($extendedHeader->isFlagEnabled(ExtendedHeaderFlag::FLAG_TAG_IS_AN_UPDATE)) {
            $this->stream->seek(1, SEEK_CUR);
        }

        if ($extendedHeader->isFlagEnabled(ExtendedHeaderFlag::FLAG_CRC_DATA_PRESENT)) {
            $extendedHeader->setCrc32($this->readCrc32());
        }

        // Only in ID3v2.4
        if ($extendedHeader->isFlagEnabled(ExtendedHeaderFlag::FLAG_TAG_RESTRICTIONS)) {
            $extendedHeader->setRestrictions($this->readRestrictions());
        }

        return $extendedHeader;
    }
}


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\Enum\ExtendedHeaderFlag;
11		use GravityMedia\Metadata\ID3v2\Enum\Version;
12		use GravityMedia\Metadata\ID3v2\ExtendedHeader;
13		use GravityMedia\Metadata\ID3v2\Stream\SynchsafeInteger32Reader;
14		use GravityMedia\Metadata\ID3v2\ExtendedHeaderInterface;
15		use GravityMedia\Metadata\ID3v2\HeaderInterface;
16		use GravityMedia\Stream\Enum\ByteOrder;
17		use GravityMedia\Stream\Reader\Integer16Reader;
18		use GravityMedia\Stream\Reader\Integer32Reader;
19		use GravityMedia\Stream\Reader\Integer8Reader;
20		use GravityMedia\Stream\StreamInterface;
21
22		/**
23		* ID3v2 extended header reader
24		*
25		* @package GravityMedia\Metadata\ID3v2\Reader
26		*/
27		class ExtendedHeaderReader
28		{
29		/**
30		* @var StreamInterface
31		*/
32		protected $stream;
33
34		/**
35		* @var HeaderInterface
36		*/
37		protected $header;
38
39		/**
40		* @var Integer8Reader
41		*/
42		protected $integer8Reader;
43
44		/**
45		* @var Integer16Reader
46		*/
47		protected $integer16Reader;
48
49		/**
50		* @var Integer32Reader
51		*/
52		protected $integer32Reader;
53
54		/**
55		* @var SynchsafeInteger32Reader
56		*/
57		protected $synchsafeInteger32Reader;
58
59		/**
60		* Create ID3v2 extended header reader.
61		*
62		* @param StreamInterface $stream
63		* @param HeaderInterface $header
64		*/
65		public function __construct(StreamInterface $stream, HeaderInterface $header)
66		{
67		$this->stream = $stream;
68		$this->header = $header;
69		}
70
71		/**
72		* Get 8-bit integer reader.
73		*
74		* @return Integer8Reader
75		*/
76		public function getInteger8Reader()
77		{
78		if (null === $this->integer8Reader) {
79		$this->integer8Reader = new Integer8Reader($this->stream);
80		}
81
82		return $this->integer8Reader;
83		}
84
85		/**
86		* Get 16-bit integer reader
87		*
88		* @return Integer16Reader
89		*/
90	View Code Duplication	public function getInteger16Reader()
		0 ignored issues – show Duplication introduced 2016-03-28 15:50 UTC by Report Bug Copy Issue Report This method seems to be duplicated in 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...
91		{
92		if (null === $this->integer16Reader) {
93		$this->integer16Reader = new Integer16Reader($this->stream);
94		$this->integer16Reader->setByteOrder(ByteOrder::BIG_ENDIAN);
95		}
96
97		return $this->integer16Reader;
98		}
99
100		/**
101		* Get 32-bit integer reader
102		*
103		* @return Integer32Reader
104		*/
105	View Code Duplication	public function getInteger32Reader()
		0 ignored issues – show Duplication introduced 2016-03-28 15:50 UTC by Report Bug Copy Issue Report This method seems to be duplicated in 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...
106		{
107		if (null === $this->integer32Reader) {
108		$this->integer32Reader = new Integer32Reader($this->stream);
109		$this->integer32Reader->setByteOrder(ByteOrder::BIG_ENDIAN);
110		}
111
112		return $this->integer32Reader;
113		}
114
115		/**
116		* Get synchsafe 32-bit integer reader
117		*
118		* @return SynchsafeInteger32Reader
119		*/
120	View Code Duplication	public function getSynchsafeInteger32Reader()
		0 ignored issues – show Duplication introduced 2016-03-28 15:50 UTC by Report Bug Copy Issue Report This method seems to be duplicated in 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...
121		{
122		if (null === $this->synchsafeInteger32Reader) {
123		$this->synchsafeInteger32Reader = new SynchsafeInteger32Reader($this->stream);
124		$this->synchsafeInteger32Reader->setByteOrder(ByteOrder::BIG_ENDIAN);
125		}
126
127		return $this->synchsafeInteger32Reader;
128		}
129
130		/**
131		* Read ID3v2 extended header size.
132		*
133		* @return int
134		*/
135		protected function readSize()
136		{
137		if (Version::VERSION_23 === $this->header->getVersion()) {
138		return $this->getInteger32Reader()->read();
139		}
140
141		return $this->getSynchsafeInteger32Reader()->read();
142		}
143
144		/**
145		* Read ID3v2 extended header flags.
146		*
147		* @return array
148		*/
149		protected function readFlags()
150		{
151		if (Version::VERSION_23 === $this->header->getVersion()) {
152		$flags = $this->getInteger16Reader()->read();
153
154		return [
155		ExtendedHeaderFlag::FLAG_CRC_DATA_PRESENT => (bool)($flags & 0x8000)
156		];
157		}
158
159		$this->stream->seek(1, SEEK_CUR);
160
161		$flags = $this->getInteger8Reader()->read();
162
163		return [
164		ExtendedHeaderFlag::FLAG_TAG_IS_AN_UPDATE => (bool)($flags & 0x40),
165		ExtendedHeaderFlag::FLAG_CRC_DATA_PRESENT => (bool)($flags & 0x20),
166		ExtendedHeaderFlag::FLAG_TAG_RESTRICTIONS => (bool)($flags & 0x10)
167		];
168		}
169
170		/**
171		* Read ID3v2 extended header padding.
172		*
173		* @return int
174		*/
175		protected function readPadding()
176		{
177		return $this->getInteger32Reader()->read();
178		}
179
180		/**
181		* Read ID3v2 extended header CRC-32 data.
182		*
183		* @return int
184		*/
185		protected function readCrc32()
186		{
187		if (Version::VERSION_23 === $this->header->getVersion()) {
188		return $this->getInteger32Reader()->read();
189		}
190
191		$this->stream->seek(1, SEEK_CUR);
192
193		return $this->getInteger8Reader()->read() * (0xfffffff + 1) + $this->getSynchsafeInteger32Reader()->read();
194		}
195
196		/**
197		* Read ID3v2 extended header restrictions.
198		*
199		* @return int
200		*/
201		protected function readRestrictions()
202		{
203		$this->stream->seek(1, SEEK_CUR);
204
205		return $this->getInteger8Reader()->read();
206		}
207
208		/**
209		* Read ID3v2 extended header.
210		*
211		* @return ExtendedHeaderInterface
212		*/
213		public function read()
214		{
215		$extendedHeader = new ExtendedHeader();
216		$extendedHeader
217		->setSize($this->readSize())
218		->setFlags($this->readFlags());
219
220		// Only in ID3v2.3
221		if (Version::VERSION_23 === $this->header->getVersion()) {
222		$extendedHeader->setPadding($this->readPadding());
223		}
224
225		// Only in ID3v2.3
226		if ($extendedHeader->isFlagEnabled(ExtendedHeaderFlag::FLAG_TAG_IS_AN_UPDATE)) {
227		$this->stream->seek(1, SEEK_CUR);
228		}
229
230		if ($extendedHeader->isFlagEnabled(ExtendedHeaderFlag::FLAG_CRC_DATA_PRESENT)) {
231		$extendedHeader->setCrc32($this->readCrc32());
232		}
233
234		// Only in ID3v2.4
235		if ($extendedHeader->isFlagEnabled(ExtendedHeaderFlag::FLAG_TAG_RESTRICTIONS)) {
236		$extendedHeader->setRestrictions($this->readRestrictions());
237		}
238
239		return $extendedHeader;
240		}
241		}
242

GravityMedia / Metadata

Push — id3-metadata-objects ( a3a88a...ecc500 )

ExtendedHeaderReader::getInteger16Reader() A

Complexity

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Duplication

Importance

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