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gerrit-public.fairphone.software / platform / external / ImageMagick / 78817adf5263f4ee13725cd84ef4b550d26ac563 / . / coders / uyvy.c
blob: aacfc677750b8ad2488faabe8e791d42e1013a65 [file] [log] [blame]
cristy3ed852e2009-09-05 21:47:34 +0000[diff] [blame]1/*
2%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
3% %
4% %
5% %
6% U U Y Y V V Y Y %
7% U U Y Y V V Y Y %
8% U U Y V V Y %
9% U U Y V V Y %
10% UUU Y V Y %
11% %
12% %
13% Read/Write 16bit/pixel Interleaved YUV Image Format %
14% %
15% Software Design %
16% John Cristy %
17% July 1992 %
18% %
19% %
cristy16af1cb2009-12-11 21:38:29 +0000[diff] [blame]20% Copyright 1999-2010 ImageMagick Studio LLC, a non-profit organization %
cristy3ed852e2009-09-05 21:47:34 +0000[diff] [blame]21% dedicated to making software imaging solutions freely available. %
22% %
23% You may not use this file except in compliance with the License. You may %
24% obtain a copy of the License at %
25% %
26% http://www.imagemagick.org/script/license.php %
27% %
28% Unless required by applicable law or agreed to in writing, software %
29% distributed under the License is distributed on an "AS IS" BASIS, %
30% WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. %
31% See the License for the specific language governing permissions and %
32% limitations under the License. %
33% %
34%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
35%
36%
37*/
38
39/*
40 Include declarations.
41*/
42#include "magick/studio.h"
43#include "magick/blob.h"
44#include "magick/blob-private.h"
45#include "magick/cache.h"
46#include "magick/color.h"
47#include "magick/colorspace.h"
48#include "magick/exception.h"
49#include "magick/exception-private.h"
50#include "magick/image.h"
51#include "magick/image-private.h"
52#include "magick/list.h"
53#include "magick/magick.h"
54#include "magick/memory_.h"
55#include "magick/monitor.h"
56#include "magick/monitor-private.h"
57#include "magick/quantum-private.h"
58#include "magick/static.h"
59#include "magick/string_.h"
60#include "magick/module.h"
61
62/*
63 Forward declarations.
64*/
65static MagickBooleanType
66 WriteUYVYImage(const ImageInfo *,Image *);
67
68/*
69%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
70% %
71% %
72% %
73% R e a d U Y V Y I m a g e %
74% %
75% %
76% %
77%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
78%
79% ReadUYVYImage() reads an image in the UYVY format and returns it. It
80% allocates the memory necessary for the new Image structure and returns a
81% pointer to the new image.
82%
83% The format of the ReadUYVYImage method is:
84%
85% Image *ReadUYVYImage(const ImageInfo *image_info,
86% ExceptionInfo *exception)
87%
88% A description of each parameter follows:
89%
90% o image_info: the image info.
91%
92% o exception: return any errors or warnings in this structure.
93%
94%
95*/
96static Image *ReadUYVYImage(const ImageInfo *image_info,
97 ExceptionInfo *exception)
98{
99 Image
100 *image;
101
102 long
103 y;
104
105 MagickBooleanType
106 status;
107
108 register long
109 x;
110
111 register PixelPacket
112 *q;
113
114 register long
115 i;
116
117 unsigned char
118 u,
119 v,
120 y1,
121 y2;
122
123 /*
124 Open image file.
125 */
126 assert(image_info != (const ImageInfo *) NULL);
127 assert(image_info->signature == MagickSignature);
128 if (image_info->debug != MagickFalse)
129 (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",
130 image_info->filename);
131 assert(exception != (ExceptionInfo *) NULL);
132 assert(exception->signature == MagickSignature);
133 image=AcquireImage(image_info);
134 if ((image->columns == 0) || (image->rows == 0))
135 ThrowReaderException(OptionError,"MustSpecifyImageSize");
136 if ((image->columns % 2) != 0)
137 image->columns++;
138 (void) CopyMagickString(image->filename,image_info->filename,MaxTextExtent);
139 status=OpenBlob(image_info,image,ReadBinaryBlobMode,exception);
140 if (status == MagickFalse)
141 return((Image *) NULL);
142 for (i=0; i < image->offset; i++)
143 if (ReadBlobByte(image) == EOF)
144 {
145 ThrowFileException(exception,CorruptImageError,"UnexpectedEndOfFile",
146 image->filename);
147 break;
148 }
149 image->depth=8;
150 if (image_info->ping != MagickFalse)
151 {
152 (void) CloseBlob(image);
153 return(GetFirstImageInList(image));
154 }
155 /*
156 Accumulate UYVY, then unpack into two pixels.
157 */
158 for (y=0; y < (long) image->rows; y++)
159 {
160 q=QueueAuthenticPixels(image,0,y,image->columns,1,exception);
161 if (q == (PixelPacket *) NULL)
162 break;
163 for (x=0; x < (long) (image->columns >> 1); x++)
164 {
165 u=(unsigned char) ReadBlobByte(image);
166 y1=(unsigned char) ReadBlobByte(image);
167 v=(unsigned char) ReadBlobByte(image);
168 y2=(unsigned char) ReadBlobByte(image);
169 q->red=ScaleCharToQuantum(y1);
170 q->green=ScaleCharToQuantum(u);
171 q->blue=ScaleCharToQuantum(v);
172 q++;
173 q->red=ScaleCharToQuantum(y2);
174 q->green=ScaleCharToQuantum(u);
175 q->blue=ScaleCharToQuantum(v);
176 q++;
177 }
178 if (SyncAuthenticPixels(image,exception) == MagickFalse)
179 break;
180 status=SetImageProgress(image,LoadImageTag,y,image->rows);
181 if (status == MagickFalse)
182 break;
183 }
184 image->colorspace=YCbCrColorspace;
185 if (EOFBlob(image) != MagickFalse)
186 ThrowFileException(exception,CorruptImageError,"UnexpectedEndOfFile",
187 image->filename);
188 (void) CloseBlob(image);
189 return(GetFirstImageInList(image));
190}
191
192/*
193%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
194% %
195% %
196% %
197% R e g i s t e r U Y V Y I m a g e %
198% %
199% %
200% %
201%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
202%
203% RegisterUYVYImage() adds attributes for the UYVY image format to
204% the list of supported formats. The attributes include the image format
205% tag, a method to read and/or write the format, whether the format
206% supports the saving of more than one frame to the same file or blob,
207% whether the format supports native in-memory I/O, and a brief
208% description of the format.
209%
210% The format of the RegisterUYVYImage method is:
211%
212% unsigned long RegisterUYVYImage(void)
213%
214*/
215ModuleExport unsigned long RegisterUYVYImage(void)
216{
217 MagickInfo
218 *entry;
219
220 entry=SetMagickInfo("PAL");
221 entry->decoder=(DecodeImageHandler *) ReadUYVYImage;
222 entry->encoder=(EncodeImageHandler *) WriteUYVYImage;
223 entry->adjoin=MagickFalse;
224 entry->raw=MagickTrue;
225 entry->endian_support=MagickTrue;
226 entry->description=ConstantString("16bit/pixel interleaved YUV");
227 entry->module=ConstantString("UYVY");
228 (void) RegisterMagickInfo(entry);
229 entry=SetMagickInfo("UYVY");
230 entry->decoder=(DecodeImageHandler *) ReadUYVYImage;
231 entry->encoder=(EncodeImageHandler *) WriteUYVYImage;
232 entry->adjoin=MagickFalse;
233 entry->raw=MagickTrue;
234 entry->endian_support=MagickTrue;
235 entry->description=ConstantString("16bit/pixel interleaved YUV");
236 entry->module=ConstantString("UYVY");
237 (void) RegisterMagickInfo(entry);
238 return(MagickImageCoderSignature);
239}
240
241/*
242%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
243% %
244% %
245% %
246% U n r e g i s t e r U Y V Y I m a g e %
247% %
248% %
249% %
250%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
251%
252% UnregisterUYVYImage() removes format registrations made by the
253% UYVY module from the list of supported formats.
254%
255% The format of the UnregisterUYVYImage method is:
256%
257% UnregisterUYVYImage(void)
258%
259*/
260ModuleExport void UnregisterUYVYImage(void)
261{
262 (void) UnregisterMagickInfo("PAL");
263 (void) UnregisterMagickInfo("UYVY");
264}
265
266/*
267%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
268% %
269% %
270% %
271% W r i t e U Y V Y I m a g e %
272% %
273% %
274% %
275%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
276%
277% WriteUYVYImage() writes an image to a file in the digital UYVY
278% format. This format, used by AccomWSD, is not dramatically higher quality
279% than the 12bit/pixel YUV format, but has better locality.
280%
281% The format of the WriteUYVYImage method is:
282%
283% MagickBooleanType WriteUYVYImage(const ImageInfo *image_info,
284% Image *image)
285%
286% A description of each parameter follows.
287%
288% o image_info: the image info.
289%
290% o image: The image.
291% Implicit assumption: number of columns is even.
292%
293*/
294static MagickBooleanType WriteUYVYImage(const ImageInfo *image_info,
295 Image *image)
296{
297 MagickPixelPacket
298 pixel;
299
300 Image
301 *uyvy_image;
302
303 long
304 y;
305
306 MagickBooleanType
307 full,
308 status;
309
310 register const PixelPacket
311 *p;
312
313 register long
314 x;
315
316 /*
317 Open output image file.
318 */
319 assert(image_info != (const ImageInfo *) NULL);
320 assert(image_info->signature == MagickSignature);
321 assert(image != (Image *) NULL);
322 assert(image->signature == MagickSignature);
323 if (image->debug != MagickFalse)
324 (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
325 if ((image->columns % 2) != 0)
326 image->columns++;
327 status=OpenBlob(image_info,image,WriteBinaryBlobMode,&image->exception);
328 if (status == MagickFalse)
329 return(status);
330 /*
331 Accumulate two pixels, then output.
332 */
333 uyvy_image=CloneImage(image,0,0,MagickTrue,&image->exception);
334 if (uyvy_image == (Image *) NULL)
335 ThrowWriterException(ResourceLimitError,image->exception.reason);
336 (void) TransformImageColorspace(uyvy_image,YCbCrColorspace);
337 full=MagickFalse;
338 (void) ResetMagickMemory(&pixel,0,sizeof(MagickPixelPacket));
339 for (y=0; y < (long) image->rows; y++)
340 {
341 p=GetVirtualPixels(uyvy_image,0,y,image->columns,1,&image->exception);
342 if (p == (const PixelPacket *) NULL)
343 break;
344 for (x=0; x < (long) image->columns; x++)
345 {
346 if (full != MagickFalse)
347 {
cristyce70c172010-01-07 17:15:30 +0000[diff] [blame]348 pixel.green=(pixel.green+GetGreenPixelComponent(p))/2;
349 pixel.blue=(pixel.blue+GetBluePixelComponent(p))/2;
cristy3ed852e2009-09-05 21:47:34 +0000[diff] [blame]350 (void) WriteBlobByte(image,ScaleQuantumToChar((Quantum) pixel.green));
351 (void) WriteBlobByte(image,ScaleQuantumToChar((Quantum) pixel.red));
352 (void) WriteBlobByte(image,ScaleQuantumToChar((Quantum) pixel.blue));
cristyce70c172010-01-07 17:15:30 +0000[diff] [blame]353 (void) WriteBlobByte(image,ScaleQuantumToChar(GetRedPixelComponent(p)));
cristy3ed852e2009-09-05 21:47:34 +0000[diff] [blame]354 }
cristyce70c172010-01-07 17:15:30 +0000[diff] [blame]355 pixel.red=(double) GetRedPixelComponent(p);
356 pixel.green=(double) GetGreenPixelComponent(p);
357 pixel.blue=(double) GetBluePixelComponent(p);
cristy3ed852e2009-09-05 21:47:34 +0000[diff] [blame]358 full=full == MagickFalse ? MagickTrue : MagickFalse;
359 p++;
360 }
361 status=SetImageProgress(image,LoadImageTag,y,image->rows);
362 if (status == MagickFalse)
363 break;
364 }
365 uyvy_image=DestroyImage(uyvy_image);
366 (void) CloseBlob(image);
367 return(MagickTrue);
368}