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source: extensions/charlies_content/getid3/getid3/module.graphic.bmp.php @ 3318

Last change on this file since 3318 was 3318, checked in by vdigital, 15 years ago
+ Add Charlies' content to depository
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1	<?php
2	// +----------------------------------------------------------------------+
3	// \| PHP version 5 \|
4	// +----------------------------------------------------------------------+
5	// \| Copyright (c) 2002-2006 James Heinrich, Allan Hansen \|
6	// +----------------------------------------------------------------------+
7	// \| This source file is subject to version 2 of the GPL license, \|
8	// \| that is bundled with this package in the file license.txt and is \|
9	// \| available through the world-wide-web at the following url: \|
10	// \| http://www.gnu.org/copyleft/gpl.html \|
11	// +----------------------------------------------------------------------+
12	// \| getID3() - http://getid3.sourceforge.net or http://www.getid3.org \|
13	// +----------------------------------------------------------------------+
14	// \| Authors: James Heinrich <infoØgetid3*org> \|
15	// \| Allan Hansen <ahØartemis*dk> \|
16	// +----------------------------------------------------------------------+
17	// \| module.graphic.bmp.php \|
18	// \| Module for analyzing BMP graphic files. \|
19	// \| dependencies: NONE \|
20	// +----------------------------------------------------------------------+
21	//
22	// $Id: module.graphic.bmp.php 3318 2009-05-20 21:54:10Z vdigital $
23
24
25
26	class getid3_bmp extends getid3_handler
27	{
28
29
30	public function Analyze() {
31
32	$getid3 = $this->getid3;
33
34	// BITMAPFILEHEADER [14 bytes] - http://msdn.microsoft.com/library/en-us/gdi/bitmaps_62uq.asp
35	// all versions
36	// WORD bfType;
37	// DWORD bfSize;
38	// WORD bfReserved1;
39	// WORD bfReserved2;
40	// DWORD bfOffBits;
41
42	// shortcuts
43	$getid3->info['bmp']['header']['raw'] = array ();
44	$info_bmp = &$getid3->info['bmp'];
45	$info_bmp_header = &$info_bmp['header'];
46	$info_bmp_header_raw = &$info_bmp_header['raw'];
47
48	fseek($getid3->fp, $getid3->info['avdataoffset'], SEEK_SET);
49	$bmp_header = fread($getid3->fp, 14 + 40);
50
51	// Magic bytes
52	$info_bmp_header_raw['identifier'] = 'BM';
53
54	getid3_lib::ReadSequence('LittleEndian2Int', $info_bmp_header_raw, $bmp_header, 2,
55	array (
56	'filesize' => 4,
57	'reserved1' => 2,
58	'reserved2' => 2,
59	'data_offset' => 4,
60	'header_size' => 4
61	)
62	);
63
64	// Check if the hardcoded-to-1 "planes" is at offset 22 or 26
65	$planes22 = getid3_lib::LittleEndian2Int(substr($bmp_header, 22, 2));
66	$planes26 = getid3_lib::LittleEndian2Int(substr($bmp_header, 26, 2));
67	if (($planes22 == 1) && ($planes26 != 1)) {
68	$info_bmp['type_os'] = 'OS/2';
69	$info_bmp['type_version'] = 1;
70	}
71	elseif (($planes26 == 1) && ($planes22 != 1)) {
72	$info_bmp['type_os'] = 'Windows';
73	$info_bmp['type_version'] = 1;
74	}
75	elseif ($info_bmp_header_raw['header_size'] == 12) {
76	$info_bmp['type_os'] = 'OS/2';
77	$info_bmp['type_version'] = 1;
78	}
79	elseif ($info_bmp_header_raw['header_size'] == 40) {
80	$info_bmp['type_os'] = 'Windows';
81	$info_bmp['type_version'] = 1;
82	}
83	elseif ($info_bmp_header_raw['header_size'] == 84) {
84	$info_bmp['type_os'] = 'Windows';
85	$info_bmp['type_version'] = 4;
86	}
87	elseif ($info_bmp_header_raw['header_size'] == 100) {
88	$info_bmp['type_os'] = 'Windows';
89	$info_bmp['type_version'] = 5;
90	}
91	else {
92	throw new getid3_exception('Unknown BMP subtype (or not a BMP file)');
93	}
94
95	$getid3->info['fileformat'] = 'bmp';
96	$getid3->info['video']['dataformat'] = 'bmp';
97	$getid3->info['video']['lossless'] = true;
98	$getid3->info['video']['pixel_aspect_ratio'] = (float)1;
99
100	if ($info_bmp['type_os'] == 'OS/2') {
101
102	// OS/2-format BMP
103	// http://netghost.narod.ru/gff/graphics/summary/os2bmp.htm
104
105	// DWORD Size; /* Size of this structure in bytes */
106	// DWORD Width; /* Bitmap width in pixels */
107	// DWORD Height; /* Bitmap height in pixel */
108	// WORD NumPlanes; /* Number of bit planes (color depth) */
109	// WORD BitsPerPixel; /* Number of bits per pixel per plane */
110
111	getid3_lib::ReadSequence('LittleEndian2Int', $info_bmp_header_raw, $bmp_header, 18,
112	array (
113	'width' => 2,
114	'height' => 2,
115	'planes' => 2,
116	'bits_per_pixel' => 2
117	)
118	);
119
120	$getid3->info['video']['resolution_x'] = $info_bmp_header_raw['width'];
121	$getid3->info['video']['resolution_y'] = $info_bmp_header_raw['height'];
122	$getid3->info['video']['codec'] = 'BI_RGB '.$info_bmp_header_raw['bits_per_pixel'].'-bit';
123	$getid3->info['video']['bits_per_sample'] = $info_bmp_header_raw['bits_per_pixel'];
124
125	if ($info_bmp['type_version'] >= 2) {
126	// DWORD Compression; /* Bitmap compression scheme */
127	// DWORD ImageDataSize; /* Size of bitmap data in bytes */
128	// DWORD XResolution; /* X resolution of display device */
129	// DWORD YResolution; /* Y resolution of display device */
130	// DWORD ColorsUsed; /* Number of color table indices used */
131	// DWORD ColorsImportant; /* Number of important color indices */
132	// WORD Units; /* Type of units used to measure resolution */
133	// WORD Reserved; /* Pad structure to 4-byte boundary */
134	// WORD Recording; /* Recording algorithm */
135	// WORD Rendering; /* Halftoning algorithm used */
136	// DWORD Size1; /* Reserved for halftoning algorithm use */
137	// DWORD Size2; /* Reserved for halftoning algorithm use */
138	// DWORD ColorEncoding; /* Color model used in bitmap */
139	// DWORD Identifier; /* Reserved for application use */
140
141	getid3_lib::ReadSequence('LittleEndian2Int', $info_bmp_header_raw, $bmp_header, 26,
142	array (
143	'compression' => 4,
144	'bmp_data_size' => 4,
145	'resolution_h' => 4,
146	'resolution_v' => 4,
147	'colors_used' => 4,
148	'colors_important' => 4,
149	'resolution_units' => 2,
150	'reserved1' => 2,
151	'recording' => 2,
152	'rendering' => 2,
153	'size1' => 4,
154	'size2' => 4,
155	'color_encoding' => 4,
156	'identifier' => 4
157	)
158	);
159
160	$info_bmp_header['compression'] = getid3_bmp::BMPcompressionOS2Lookup($info_bmp_header_raw['compression']);
161	$getid3->info['video']['codec'] = $info_bmp_header['compression'].' '.$info_bmp_header_raw['bits_per_pixel'].'-bit';
162	}
163
164	return true;
165	}
166
167
168	if ($info_bmp['type_os'] == 'Windows') {
169
170	// Windows-format BMP
171
172	// BITMAPINFOHEADER - [40 bytes] http://msdn.microsoft.com/library/en-us/gdi/bitmaps_1rw2.asp
173	// all versions
174	// DWORD biSize;
175	// LONG biWidth;
176	// LONG biHeight;
177	// WORD biPlanes;
178	// WORD biBitCount;
179	// DWORD biCompression;
180	// DWORD biSizeImage;
181	// LONG biXPelsPerMeter;
182	// LONG biYPelsPerMeter;
183	// DWORD biClrUsed;
184	// DWORD biClrImportant;
185
186	getid3_lib::ReadSequence('LittleEndian2Int', $info_bmp_header_raw, $bmp_header, 18,
187	array (
188	'width' => -4, //signed
189	'height' => -4, //signed
190	'planes' => 2,
191	'bits_per_pixel' => 2,
192	'compression' => 4,
193	'bmp_data_size' => 4,
194	'resolution_h' => -4, //signed
195	'resolution_v' => -4, //signed
196	'colors_used' => 4,
197	'colors_important' => 4
198	)
199	);
200	foreach (array ('width', 'height', 'resolution_h', 'resolution_v') as $key) {
201	$info_bmp_header_raw[$key] = getid3_lib::LittleEndian2Int($info_bmp_header_raw[$key], true);
202	}
203
204	$info_bmp_header['compression'] = getid3_bmp::BMPcompressionWindowsLookup($info_bmp_header_raw['compression']);
205	$getid3->info['video']['resolution_x'] = $info_bmp_header_raw['width'];
206	$getid3->info['video']['resolution_y'] = $info_bmp_header_raw['height'];
207	$getid3->info['video']['codec'] = $info_bmp_header['compression'].' '.$info_bmp_header_raw['bits_per_pixel'].'-bit';
208	$getid3->info['video']['bits_per_sample'] = $info_bmp_header_raw['bits_per_pixel'];
209
210	// should only be v4+, but BMPs with type_version==1 and BI_BITFIELDS compression have been seen
211	if (($info_bmp['type_version'] >= 4) \|\| ($info_bmp_header_raw['compression'] == 3)) {
212
213
214	$bmp_header .= fread($getid3->fp, 44);
215
216	// BITMAPV4HEADER - [44 bytes] - http://msdn.microsoft.com/library/en-us/gdi/bitmaps_2k1e.asp
217	// Win95+, WinNT4.0+
218	// DWORD bV4RedMask;
219	// DWORD bV4GreenMask;
220	// DWORD bV4BlueMask;
221	// DWORD bV4AlphaMask;
222	// DWORD bV4CSType;
223	// CIEXYZTRIPLE bV4Endpoints;
224	// DWORD bV4GammaRed;
225	// DWORD bV4GammaGreen;
226	// DWORD bV4GammaBlue;
227
228	getid3_lib::ReadSequence('LittleEndian2Int', $info_bmp_header_raw, $bmp_header, 54,
229	array (
230	'red_mask' => 4,
231	'green_mask' => 4,
232	'blue_mask' => 4,
233	'alpha_mask' => 4,
234	'cs_type' => 4,
235	'ciexyz_red' => -4, //string
236	'ciexyz_green' => -4, //string
237	'ciexyz_blue' => -4, //string
238	'gamma_red' => 4,
239	'gamma_green' => 4,
240	'gamma_blue' => 4
241	)
242	);
243
244	$info_bmp_header['ciexyz_red'] = getid3_bmp::FixedPoint2_30(strrev($info_bmp_header_raw['ciexyz_red']));
245	$info_bmp_header['ciexyz_green'] = getid3_bmp::FixedPoint2_30(strrev($info_bmp_header_raw['ciexyz_green']));
246	$info_bmp_header['ciexyz_blue'] = getid3_bmp::FixedPoint2_30(strrev($info_bmp_header_raw['ciexyz_blue']));
247
248
249	if ($info_bmp['type_version'] >= 5) {
250	$bmp_header .= fread($getid3->fp, 16);
251
252	// BITMAPV5HEADER - [16 bytes] - http://msdn.microsoft.com/library/en-us/gdi/bitmaps_7c36.asp
253	// Win98+, Win2000+
254	// DWORD bV5Intent;
255	// DWORD bV5ProfileData;
256	// DWORD bV5ProfileSize;
257	// DWORD bV5Reserved;
258
259	getid3_lib::ReadSequence('LittleEndian2Int', $info_bmp_header_raw, $bmp_header, 98,
260	array (
261	'intent' => 4,
262	'profile_data_offset' => 4,
263	'profile_data_size' => 4,
264	'reserved3' => 4
265	)
266	);
267
268	}
269	}
270
271	return true;
272	}
273
274
275	throw new getid3_exception('Unknown BMP format in header.');
276
277	}
278
279
280
281	public static function BMPcompressionWindowsLookup($compression_id) {
282
283	static $lookup = array (
284	0 => 'BI_RGB',
285	1 => 'BI_RLE8',
286	2 => 'BI_RLE4',
287	3 => 'BI_BITFIELDS',
288	4 => 'BI_JPEG',
289	5 => 'BI_PNG'
290	);
291	return (isset($lookup[$compression_id]) ? $lookup[$compression_id] : 'invalid');
292	}
293
294
295
296	public static function BMPcompressionOS2Lookup($compression_id) {
297
298	static $lookup = array (
299	0 => 'BI_RGB',
300	1 => 'BI_RLE8',
301	2 => 'BI_RLE4',
302	3 => 'Huffman 1D',
303	4 => 'BI_RLE24',
304	);
305	return (isset($lookup[$compression_id]) ? $lookup[$compression_id] : 'invalid');
306	}
307
308
309	public static function FixedPoint2_30($raw_data) {
310
311	$binary_string = getid3_lib::BigEndian2Bin($raw_data);
312	return bindec(substr($binary_string, 0, 2)) + (float)(bindec(substr($binary_string, 2, 30)) / 1073741824); // pow(2, 30) = 1073741824
313	}
314
315
316	}
317
318
319	?>

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