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ffmpeg / libavcodec / imgconvert.c @ 34017fd9

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1
/*
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 * Misc image conversion routines
3
 * Copyright (c) 2001, 2002, 2003 Fabrice Bellard
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 *
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 * This file is part of FFmpeg.
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 *
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 * FFmpeg is free software; you can redistribute it and/or
8
 * modify it under the terms of the GNU Lesser General Public
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 * License as published by the Free Software Foundation; either
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 * version 2.1 of the License, or (at your option) any later version.
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 *
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 * FFmpeg is distributed in the hope that it will be useful,
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 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
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 * Lesser General Public License for more details.
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 *
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 * You should have received a copy of the GNU Lesser General Public
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 * License along with FFmpeg; if not, write to the Free Software
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 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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 */
21

    
22
/**
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 * @file
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 * misc image conversion routines
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 */
26

    
27
/* TODO:
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 * - write 'ffimg' program to test all the image related stuff
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 * - move all api to slice based system
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 * - integrate deinterlacing, postprocessing and scaling in the conversion process
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 */
32

    
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#include "avcodec.h"
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#include "dsputil.h"
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#include "internal.h"
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#include "imgconvert.h"
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#include "libavutil/colorspace.h"
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#include "libavutil/pixdesc.h"
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#include "libavcore/imgutils.h"
40

    
41
#if HAVE_MMX && HAVE_YASM
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#include "x86/dsputil_mmx.h"
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#endif
44

    
45
#define xglue(x, y) x ## y
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#define glue(x, y) xglue(x, y)
47

    
48
#define FF_COLOR_RGB      0 /**< RGB color space */
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#define FF_COLOR_GRAY     1 /**< gray color space */
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#define FF_COLOR_YUV      2 /**< YUV color space. 16 <= Y <= 235, 16 <= U, V <= 240 */
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#define FF_COLOR_YUV_JPEG 3 /**< YUV color space. 0 <= Y <= 255, 0 <= U, V <= 255 */
52

    
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#define FF_PIXEL_PLANAR   0 /**< each channel has one component in AVPicture */
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#define FF_PIXEL_PACKED   1 /**< only one components containing all the channels */
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#define FF_PIXEL_PALETTE  2  /**< one components containing indexes for a palette */
56

    
57
#if HAVE_MMX && HAVE_YASM
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#define deinterlace_line_inplace ff_deinterlace_line_inplace_mmx
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#define deinterlace_line         ff_deinterlace_line_mmx
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#else
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#define deinterlace_line_inplace deinterlace_line_inplace_c
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#define deinterlace_line         deinterlace_line_c
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#endif
64

    
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typedef struct PixFmtInfo {
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    uint8_t nb_channels;     /**< number of channels (including alpha) */
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    uint8_t color_type;      /**< color type (see FF_COLOR_xxx constants) */
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    uint8_t pixel_type;      /**< pixel storage type (see FF_PIXEL_xxx constants) */
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    uint8_t is_alpha : 1;    /**< true if alpha can be specified */
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    uint8_t depth;           /**< bit depth of the color components */
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} PixFmtInfo;
72

    
73
/* this table gives more information about formats */
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static const PixFmtInfo pix_fmt_info[PIX_FMT_NB] = {
75
    /* YUV formats */
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    [PIX_FMT_YUV420P] = {
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        .nb_channels = 3,
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        .color_type = FF_COLOR_YUV,
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        .pixel_type = FF_PIXEL_PLANAR,
80
        .depth = 8,
81
    },
82
    [PIX_FMT_YUV422P] = {
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        .nb_channels = 3,
84
        .color_type = FF_COLOR_YUV,
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        .pixel_type = FF_PIXEL_PLANAR,
86
        .depth = 8,
87
    },
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    [PIX_FMT_YUV444P] = {
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        .nb_channels = 3,
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        .color_type = FF_COLOR_YUV,
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        .pixel_type = FF_PIXEL_PLANAR,
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        .depth = 8,
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    },
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    [PIX_FMT_YUYV422] = {
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        .nb_channels = 1,
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        .color_type = FF_COLOR_YUV,
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        .pixel_type = FF_PIXEL_PACKED,
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        .depth = 8,
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    },
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    [PIX_FMT_UYVY422] = {
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        .nb_channels = 1,
102
        .color_type = FF_COLOR_YUV,
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        .pixel_type = FF_PIXEL_PACKED,
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        .depth = 8,
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    },
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    [PIX_FMT_YUV410P] = {
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        .nb_channels = 3,
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        .color_type = FF_COLOR_YUV,
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        .pixel_type = FF_PIXEL_PLANAR,
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        .depth = 8,
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    },
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    [PIX_FMT_YUV411P] = {
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        .nb_channels = 3,
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        .color_type = FF_COLOR_YUV,
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        .pixel_type = FF_PIXEL_PLANAR,
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        .depth = 8,
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    },
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    [PIX_FMT_YUV440P] = {
119
        .nb_channels = 3,
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        .color_type = FF_COLOR_YUV,
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        .pixel_type = FF_PIXEL_PLANAR,
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        .depth = 8,
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    },
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    [PIX_FMT_YUV420P16LE] = {
125
        .nb_channels = 3,
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        .color_type = FF_COLOR_YUV,
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        .pixel_type = FF_PIXEL_PLANAR,
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        .depth = 16,
129
    },
130
    [PIX_FMT_YUV422P16LE] = {
131
        .nb_channels = 3,
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        .color_type = FF_COLOR_YUV,
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        .pixel_type = FF_PIXEL_PLANAR,
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        .depth = 16,
135
    },
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    [PIX_FMT_YUV444P16LE] = {
137
        .nb_channels = 3,
138
        .color_type = FF_COLOR_YUV,
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        .pixel_type = FF_PIXEL_PLANAR,
140
        .depth = 16,
141
    },
142
    [PIX_FMT_YUV420P16BE] = {
143
        .nb_channels = 3,
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        .color_type = FF_COLOR_YUV,
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        .pixel_type = FF_PIXEL_PLANAR,
146
        .depth = 16,
147
    },
148
    [PIX_FMT_YUV422P16BE] = {
149
        .nb_channels = 3,
150
        .color_type = FF_COLOR_YUV,
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        .pixel_type = FF_PIXEL_PLANAR,
152
        .depth = 16,
153
    },
154
    [PIX_FMT_YUV444P16BE] = {
155
        .nb_channels = 3,
156
        .color_type = FF_COLOR_YUV,
157
        .pixel_type = FF_PIXEL_PLANAR,
158
        .depth = 16,
159
    },
160

    
161

    
162
    /* YUV formats with alpha plane */
163
    [PIX_FMT_YUVA420P] = {
164
        .nb_channels = 4,
165
        .color_type = FF_COLOR_YUV,
166
        .pixel_type = FF_PIXEL_PLANAR,
167
        .depth = 8,
168
    },
169

    
170
    /* JPEG YUV */
171
    [PIX_FMT_YUVJ420P] = {
172
        .nb_channels = 3,
173
        .color_type = FF_COLOR_YUV_JPEG,
174
        .pixel_type = FF_PIXEL_PLANAR,
175
        .depth = 8,
176
    },
177
    [PIX_FMT_YUVJ422P] = {
178
        .nb_channels = 3,
179
        .color_type = FF_COLOR_YUV_JPEG,
180
        .pixel_type = FF_PIXEL_PLANAR,
181
        .depth = 8,
182
    },
183
    [PIX_FMT_YUVJ444P] = {
184
        .nb_channels = 3,
185
        .color_type = FF_COLOR_YUV_JPEG,
186
        .pixel_type = FF_PIXEL_PLANAR,
187
        .depth = 8,
188
    },
189
    [PIX_FMT_YUVJ440P] = {
190
        .nb_channels = 3,
191
        .color_type = FF_COLOR_YUV_JPEG,
192
        .pixel_type = FF_PIXEL_PLANAR,
193
        .depth = 8,
194
    },
195

    
196
    /* RGB formats */
197
    [PIX_FMT_RGB24] = {
198
        .nb_channels = 3,
199
        .color_type = FF_COLOR_RGB,
200
        .pixel_type = FF_PIXEL_PACKED,
201
        .depth = 8,
202
    },
203
    [PIX_FMT_BGR24] = {
204
        .nb_channels = 3,
205
        .color_type = FF_COLOR_RGB,
206
        .pixel_type = FF_PIXEL_PACKED,
207
        .depth = 8,
208
    },
209
    [PIX_FMT_ARGB] = {
210
        .nb_channels = 4, .is_alpha = 1,
211
        .color_type = FF_COLOR_RGB,
212
        .pixel_type = FF_PIXEL_PACKED,
213
        .depth = 8,
214
    },
215
    [PIX_FMT_RGB48BE] = {
216
        .nb_channels = 3,
217
        .color_type = FF_COLOR_RGB,
218
        .pixel_type = FF_PIXEL_PACKED,
219
        .depth = 16,
220
    },
221
    [PIX_FMT_RGB48LE] = {
222
        .nb_channels = 3,
223
        .color_type = FF_COLOR_RGB,
224
        .pixel_type = FF_PIXEL_PACKED,
225
        .depth = 16,
226
    },
227
    [PIX_FMT_RGB565BE] = {
228
        .nb_channels = 3,
229
        .color_type = FF_COLOR_RGB,
230
        .pixel_type = FF_PIXEL_PACKED,
231
        .depth = 5,
232
    },
233
    [PIX_FMT_RGB565LE] = {
234
        .nb_channels = 3,
235
        .color_type = FF_COLOR_RGB,
236
        .pixel_type = FF_PIXEL_PACKED,
237
        .depth = 5,
238
    },
239
    [PIX_FMT_RGB555BE] = {
240
        .nb_channels = 3,
241
        .color_type = FF_COLOR_RGB,
242
        .pixel_type = FF_PIXEL_PACKED,
243
        .depth = 5,
244
    },
245
    [PIX_FMT_RGB555LE] = {
246
        .nb_channels = 3,
247
        .color_type = FF_COLOR_RGB,
248
        .pixel_type = FF_PIXEL_PACKED,
249
        .depth = 5,
250
    },
251
    [PIX_FMT_RGB444BE] = {
252
        .nb_channels = 3,
253
        .color_type = FF_COLOR_RGB,
254
        .pixel_type = FF_PIXEL_PACKED,
255
        .depth = 4,
256
    },
257
    [PIX_FMT_RGB444LE] = {
258
        .nb_channels = 3,
259
        .color_type = FF_COLOR_RGB,
260
        .pixel_type = FF_PIXEL_PACKED,
261
        .depth = 4,
262
    },
263

    
264
    /* gray / mono formats */
265
    [PIX_FMT_GRAY16BE] = {
266
        .nb_channels = 1,
267
        .color_type = FF_COLOR_GRAY,
268
        .pixel_type = FF_PIXEL_PLANAR,
269
        .depth = 16,
270
    },
271
    [PIX_FMT_GRAY16LE] = {
272
        .nb_channels = 1,
273
        .color_type = FF_COLOR_GRAY,
274
        .pixel_type = FF_PIXEL_PLANAR,
275
        .depth = 16,
276
    },
277
    [PIX_FMT_GRAY8] = {
278
        .nb_channels = 1,
279
        .color_type = FF_COLOR_GRAY,
280
        .pixel_type = FF_PIXEL_PLANAR,
281
        .depth = 8,
282
    },
283
    [PIX_FMT_MONOWHITE] = {
284
        .nb_channels = 1,
285
        .color_type = FF_COLOR_GRAY,
286
        .pixel_type = FF_PIXEL_PLANAR,
287
        .depth = 1,
288
    },
289
    [PIX_FMT_MONOBLACK] = {
290
        .nb_channels = 1,
291
        .color_type = FF_COLOR_GRAY,
292
        .pixel_type = FF_PIXEL_PLANAR,
293
        .depth = 1,
294
    },
295

    
296
    /* paletted formats */
297
    [PIX_FMT_PAL8] = {
298
        .nb_channels = 4, .is_alpha = 1,
299
        .color_type = FF_COLOR_RGB,
300
        .pixel_type = FF_PIXEL_PALETTE,
301
        .depth = 8,
302
    },
303
    [PIX_FMT_UYYVYY411] = {
304
        .nb_channels = 1,
305
        .color_type = FF_COLOR_YUV,
306
        .pixel_type = FF_PIXEL_PACKED,
307
        .depth = 8,
308
    },
309
    [PIX_FMT_ABGR] = {
310
        .nb_channels = 4, .is_alpha = 1,
311
        .color_type = FF_COLOR_RGB,
312
        .pixel_type = FF_PIXEL_PACKED,
313
        .depth = 8,
314
    },
315
    [PIX_FMT_BGR565BE] = {
316
        .nb_channels = 3,
317
        .color_type = FF_COLOR_RGB,
318
        .pixel_type = FF_PIXEL_PACKED,
319
        .depth = 5,
320
    },
321
    [PIX_FMT_BGR565LE] = {
322
        .nb_channels = 3,
323
        .color_type = FF_COLOR_RGB,
324
        .pixel_type = FF_PIXEL_PACKED,
325
        .depth = 5,
326
    },
327
    [PIX_FMT_BGR555BE] = {
328
        .nb_channels = 3,
329
        .color_type = FF_COLOR_RGB,
330
        .pixel_type = FF_PIXEL_PACKED,
331
        .depth = 5,
332
    },
333
    [PIX_FMT_BGR555LE] = {
334
        .nb_channels = 3,
335
        .color_type = FF_COLOR_RGB,
336
        .pixel_type = FF_PIXEL_PACKED,
337
        .depth = 5,
338
    },
339
    [PIX_FMT_BGR444BE] = {
340
        .nb_channels = 3,
341
        .color_type = FF_COLOR_RGB,
342
        .pixel_type = FF_PIXEL_PACKED,
343
        .depth = 4,
344
    },
345
    [PIX_FMT_BGR444LE] = {
346
        .nb_channels = 3,
347
        .color_type = FF_COLOR_RGB,
348
        .pixel_type = FF_PIXEL_PACKED,
349
        .depth = 4,
350
    },
351
    [PIX_FMT_RGB8] = {
352
        .nb_channels = 1,
353
        .color_type = FF_COLOR_RGB,
354
        .pixel_type = FF_PIXEL_PACKED,
355
        .depth = 8,
356
    },
357
    [PIX_FMT_RGB4] = {
358
        .nb_channels = 1,
359
        .color_type = FF_COLOR_RGB,
360
        .pixel_type = FF_PIXEL_PACKED,
361
        .depth = 4,
362
    },
363
    [PIX_FMT_RGB4_BYTE] = {
364
        .nb_channels = 1,
365
        .color_type = FF_COLOR_RGB,
366
        .pixel_type = FF_PIXEL_PACKED,
367
        .depth = 8,
368
    },
369
    [PIX_FMT_BGR8] = {
370
        .nb_channels = 1,
371
        .color_type = FF_COLOR_RGB,
372
        .pixel_type = FF_PIXEL_PACKED,
373
        .depth = 8,
374
    },
375
    [PIX_FMT_BGR4] = {
376
        .nb_channels = 1,
377
        .color_type = FF_COLOR_RGB,
378
        .pixel_type = FF_PIXEL_PACKED,
379
        .depth = 4,
380
    },
381
    [PIX_FMT_BGR4_BYTE] = {
382
        .nb_channels = 1,
383
        .color_type = FF_COLOR_RGB,
384
        .pixel_type = FF_PIXEL_PACKED,
385
        .depth = 8,
386
    },
387
    [PIX_FMT_NV12] = {
388
        .nb_channels = 2,
389
        .color_type = FF_COLOR_YUV,
390
        .pixel_type = FF_PIXEL_PLANAR,
391
        .depth = 8,
392
    },
393
    [PIX_FMT_NV21] = {
394
        .nb_channels = 2,
395
        .color_type = FF_COLOR_YUV,
396
        .pixel_type = FF_PIXEL_PLANAR,
397
        .depth = 8,
398
    },
399

    
400
    [PIX_FMT_BGRA] = {
401
        .nb_channels = 4, .is_alpha = 1,
402
        .color_type = FF_COLOR_RGB,
403
        .pixel_type = FF_PIXEL_PACKED,
404
        .depth = 8,
405
    },
406
    [PIX_FMT_RGBA] = {
407
        .nb_channels = 4, .is_alpha = 1,
408
        .color_type = FF_COLOR_RGB,
409
        .pixel_type = FF_PIXEL_PACKED,
410
        .depth = 8,
411
    },
412
};
413

    
414
void avcodec_get_chroma_sub_sample(enum PixelFormat pix_fmt, int *h_shift, int *v_shift)
415
{
416
    *h_shift = av_pix_fmt_descriptors[pix_fmt].log2_chroma_w;
417
    *v_shift = av_pix_fmt_descriptors[pix_fmt].log2_chroma_h;
418
}
419

    
420
const char *avcodec_get_pix_fmt_name(enum PixelFormat pix_fmt)
421
{
422
    if (pix_fmt < 0 || pix_fmt >= PIX_FMT_NB)
423
        return NULL;
424
    else
425
        return av_pix_fmt_descriptors[pix_fmt].name;
426
}
427

    
428
#if LIBAVCODEC_VERSION_MAJOR < 53
429
enum PixelFormat avcodec_get_pix_fmt(const char *name)
430
{
431
    return av_get_pix_fmt(name);
432
}
433
#endif
434

    
435
void avcodec_pix_fmt_string (char *buf, int buf_size, enum PixelFormat pix_fmt)
436
{
437
    /* print header */
438
    if (pix_fmt < 0)
439
        snprintf (buf, buf_size,
440
                  "name      " " nb_channels" " depth" " is_alpha"
441
            );
442
    else{
443
        PixFmtInfo info= pix_fmt_info[pix_fmt];
444

    
445
        char is_alpha_char= info.is_alpha ? 'y' : 'n';
446

    
447
        snprintf (buf, buf_size,
448
                  "%-11s %5d %9d %6c",
449
                  av_pix_fmt_descriptors[pix_fmt].name,
450
                  info.nb_channels,
451
                  info.depth,
452
                  is_alpha_char
453
            );
454
    }
455
}
456

    
457
int ff_is_hwaccel_pix_fmt(enum PixelFormat pix_fmt)
458
{
459
    return av_pix_fmt_descriptors[pix_fmt].flags & PIX_FMT_HWACCEL;
460
}
461

    
462
int ff_set_systematic_pal(uint32_t pal[256], enum PixelFormat pix_fmt){
463
    int i;
464

    
465
    for(i=0; i<256; i++){
466
        int r,g,b;
467

    
468
        switch(pix_fmt) {
469
        case PIX_FMT_RGB8:
470
            r= (i>>5    )*36;
471
            g= ((i>>2)&7)*36;
472
            b= (i&3     )*85;
473
            break;
474
        case PIX_FMT_BGR8:
475
            b= (i>>6    )*85;
476
            g= ((i>>3)&7)*36;
477
            r= (i&7     )*36;
478
            break;
479
        case PIX_FMT_RGB4_BYTE:
480
            r= (i>>3    )*255;
481
            g= ((i>>1)&3)*85;
482
            b= (i&1     )*255;
483
            break;
484
        case PIX_FMT_BGR4_BYTE:
485
            b= (i>>3    )*255;
486
            g= ((i>>1)&3)*85;
487
            r= (i&1     )*255;
488
            break;
489
        case PIX_FMT_GRAY8:
490
            r=b=g= i;
491
            break;
492
        default:
493
            return -1;
494
        }
495
        pal[i] =  b + (g<<8) + (r<<16);
496
    }
497

    
498
    return 0;
499
}
500

    
501
#if LIBAVCODEC_VERSION_MAJOR < 53
502
int ff_fill_linesize(AVPicture *picture, enum PixelFormat pix_fmt, int width)
503
{
504
    return av_image_fill_linesizes(picture->linesize, pix_fmt, width);
505
}
506

    
507
int ff_fill_pointer(AVPicture *picture, uint8_t *ptr, enum PixelFormat pix_fmt,
508
                    int height)
509
{
510
    return av_image_fill_pointers(picture->data, pix_fmt, height, ptr, picture->linesize);
511
}
512
#endif
513

    
514
int avpicture_fill(AVPicture *picture, uint8_t *ptr,
515
                   enum PixelFormat pix_fmt, int width, int height)
516
{
517

    
518
    if(av_image_check_size(width, height, 0, NULL))
519
        return -1;
520

    
521
    if (av_image_fill_linesizes(picture->linesize, pix_fmt, width))
522
        return -1;
523

    
524
    return av_image_fill_pointers(picture->data, pix_fmt, height, ptr, picture->linesize);
525
}
526

    
527
int avpicture_layout(const AVPicture* src, enum PixelFormat pix_fmt, int width, int height,
528
                     unsigned char *dest, int dest_size)
529
{
530
    const PixFmtInfo* pf = &pix_fmt_info[pix_fmt];
531
    const AVPixFmtDescriptor *desc = &av_pix_fmt_descriptors[pix_fmt];
532
    int i, j, w, ow, h, oh, data_planes;
533
    const unsigned char* s;
534
    int size = avpicture_get_size(pix_fmt, width, height);
535

    
536
    if (size > dest_size || size < 0)
537
        return -1;
538

    
539
    if (pf->pixel_type == FF_PIXEL_PACKED || pf->pixel_type == FF_PIXEL_PALETTE) {
540
        if (pix_fmt == PIX_FMT_YUYV422 ||
541
            pix_fmt == PIX_FMT_UYVY422 ||
542
            pix_fmt == PIX_FMT_BGR565BE ||
543
            pix_fmt == PIX_FMT_BGR565LE ||
544
            pix_fmt == PIX_FMT_BGR555BE ||
545
            pix_fmt == PIX_FMT_BGR555LE ||
546
            pix_fmt == PIX_FMT_BGR444BE ||
547
            pix_fmt == PIX_FMT_BGR444LE ||
548
            pix_fmt == PIX_FMT_RGB565BE ||
549
            pix_fmt == PIX_FMT_RGB565LE ||
550
            pix_fmt == PIX_FMT_RGB555BE ||
551
            pix_fmt == PIX_FMT_RGB555LE ||
552
            pix_fmt == PIX_FMT_RGB444BE ||
553
            pix_fmt == PIX_FMT_RGB444LE)
554
            w = width * 2;
555
        else if (pix_fmt == PIX_FMT_UYYVYY411)
556
            w = width + width/2;
557
        else if (pix_fmt == PIX_FMT_PAL8)
558
            w = width;
559
        else
560
            w = width * (pf->depth * pf->nb_channels / 8);
561

    
562
        data_planes = 1;
563
        h = height;
564
    } else {
565
        data_planes = pf->nb_channels;
566
        w = (width*pf->depth + 7)/8;
567
        h = height;
568
    }
569

    
570
    ow = w;
571
    oh = h;
572

    
573
    for (i=0; i<data_planes; i++) {
574
        if (i == 1) {
575
            w = (- ((-width) >> desc->log2_chroma_w) * pf->depth + 7) / 8;
576
            h = -((-height) >> desc->log2_chroma_h);
577
            if (pix_fmt == PIX_FMT_NV12 || pix_fmt == PIX_FMT_NV21)
578
                w <<= 1;
579
        } else if (i == 3) {
580
            w = ow;
581
            h = oh;
582
        }
583
        s = src->data[i];
584
        for(j=0; j<h; j++) {
585
            memcpy(dest, s, w);
586
            dest += w;
587
            s += src->linesize[i];
588
        }
589
    }
590

    
591
    if (pf->pixel_type == FF_PIXEL_PALETTE)
592
        memcpy((unsigned char *)(((size_t)dest + 3) & ~3), src->data[1], 256 * 4);
593

    
594
    return size;
595
}
596

    
597
int avpicture_get_size(enum PixelFormat pix_fmt, int width, int height)
598
{
599
    AVPicture dummy_pict;
600
    if(av_image_check_size(width, height, 0, NULL))
601
        return -1;
602
    switch (pix_fmt) {
603
    case PIX_FMT_RGB8:
604
    case PIX_FMT_BGR8:
605
    case PIX_FMT_RGB4_BYTE:
606
    case PIX_FMT_BGR4_BYTE:
607
    case PIX_FMT_GRAY8:
608
        // do not include palette for these pseudo-paletted formats
609
        return width * height;
610
    }
611
    return avpicture_fill(&dummy_pict, NULL, pix_fmt, width, height);
612
}
613

    
614
int avcodec_get_pix_fmt_loss(enum PixelFormat dst_pix_fmt, enum PixelFormat src_pix_fmt,
615
                             int has_alpha)
616
{
617
    const PixFmtInfo *pf, *ps;
618
    const AVPixFmtDescriptor *src_desc = &av_pix_fmt_descriptors[src_pix_fmt];
619
    const AVPixFmtDescriptor *dst_desc = &av_pix_fmt_descriptors[dst_pix_fmt];
620
    int loss;
621

    
622
    ps = &pix_fmt_info[src_pix_fmt];
623

    
624
    /* compute loss */
625
    loss = 0;
626
    pf = &pix_fmt_info[dst_pix_fmt];
627
    if (pf->depth < ps->depth ||
628
        ((dst_pix_fmt == PIX_FMT_RGB555BE || dst_pix_fmt == PIX_FMT_RGB555LE ||
629
          dst_pix_fmt == PIX_FMT_BGR555BE || dst_pix_fmt == PIX_FMT_BGR555LE) &&
630
         (src_pix_fmt == PIX_FMT_RGB565BE || src_pix_fmt == PIX_FMT_RGB565LE ||
631
          src_pix_fmt == PIX_FMT_BGR565BE || src_pix_fmt == PIX_FMT_BGR565LE)))
632
        loss |= FF_LOSS_DEPTH;
633
    if (dst_desc->log2_chroma_w > src_desc->log2_chroma_w ||
634
        dst_desc->log2_chroma_h > src_desc->log2_chroma_h)
635
        loss |= FF_LOSS_RESOLUTION;
636
    switch(pf->color_type) {
637
    case FF_COLOR_RGB:
638
        if (ps->color_type != FF_COLOR_RGB &&
639
            ps->color_type != FF_COLOR_GRAY)
640
            loss |= FF_LOSS_COLORSPACE;
641
        break;
642
    case FF_COLOR_GRAY:
643
        if (ps->color_type != FF_COLOR_GRAY)
644
            loss |= FF_LOSS_COLORSPACE;
645
        break;
646
    case FF_COLOR_YUV:
647
        if (ps->color_type != FF_COLOR_YUV)
648
            loss |= FF_LOSS_COLORSPACE;
649
        break;
650
    case FF_COLOR_YUV_JPEG:
651
        if (ps->color_type != FF_COLOR_YUV_JPEG &&
652
            ps->color_type != FF_COLOR_YUV &&
653
            ps->color_type != FF_COLOR_GRAY)
654
            loss |= FF_LOSS_COLORSPACE;
655
        break;
656
    default:
657
        /* fail safe test */
658
        if (ps->color_type != pf->color_type)
659
            loss |= FF_LOSS_COLORSPACE;
660
        break;
661
    }
662
    if (pf->color_type == FF_COLOR_GRAY &&
663
        ps->color_type != FF_COLOR_GRAY)
664
        loss |= FF_LOSS_CHROMA;
665
    if (!pf->is_alpha && (ps->is_alpha && has_alpha))
666
        loss |= FF_LOSS_ALPHA;
667
    if (pf->pixel_type == FF_PIXEL_PALETTE &&
668
        (ps->pixel_type != FF_PIXEL_PALETTE && ps->color_type != FF_COLOR_GRAY))
669
        loss |= FF_LOSS_COLORQUANT;
670
    return loss;
671
}
672

    
673
static int avg_bits_per_pixel(enum PixelFormat pix_fmt)
674
{
675
    int bits;
676
    const PixFmtInfo *pf;
677
    const AVPixFmtDescriptor *desc = &av_pix_fmt_descriptors[pix_fmt];
678

    
679
    pf = &pix_fmt_info[pix_fmt];
680
    switch(pf->pixel_type) {
681
    case FF_PIXEL_PACKED:
682
        switch(pix_fmt) {
683
        case PIX_FMT_YUYV422:
684
        case PIX_FMT_UYVY422:
685
        case PIX_FMT_RGB565BE:
686
        case PIX_FMT_RGB565LE:
687
        case PIX_FMT_RGB555BE:
688
        case PIX_FMT_RGB555LE:
689
        case PIX_FMT_RGB444BE:
690
        case PIX_FMT_RGB444LE:
691
        case PIX_FMT_BGR565BE:
692
        case PIX_FMT_BGR565LE:
693
        case PIX_FMT_BGR555BE:
694
        case PIX_FMT_BGR555LE:
695
        case PIX_FMT_BGR444BE:
696
        case PIX_FMT_BGR444LE:
697
            bits = 16;
698
            break;
699
        case PIX_FMT_UYYVYY411:
700
            bits = 12;
701
            break;
702
        default:
703
            bits = pf->depth * pf->nb_channels;
704
            break;
705
        }
706
        break;
707
    case FF_PIXEL_PLANAR:
708
        if (desc->log2_chroma_w == 0 && desc->log2_chroma_h == 0) {
709
            bits = pf->depth * pf->nb_channels;
710
        } else {
711
            bits = pf->depth + ((2 * pf->depth) >>
712
                                (desc->log2_chroma_w + desc->log2_chroma_h));
713
        }
714
        break;
715
    case FF_PIXEL_PALETTE:
716
        bits = 8;
717
        break;
718
    default:
719
        bits = -1;
720
        break;
721
    }
722
    return bits;
723
}
724

    
725
static enum PixelFormat avcodec_find_best_pix_fmt1(int64_t pix_fmt_mask,
726
                                      enum PixelFormat src_pix_fmt,
727
                                      int has_alpha,
728
                                      int loss_mask)
729
{
730
    int dist, i, loss, min_dist;
731
    enum PixelFormat dst_pix_fmt;
732

    
733
    /* find exact color match with smallest size */
734
    dst_pix_fmt = PIX_FMT_NONE;
735
    min_dist = 0x7fffffff;
736
    for(i = 0;i < PIX_FMT_NB; i++) {
737
        if (pix_fmt_mask & (1ULL << i)) {
738
            loss = avcodec_get_pix_fmt_loss(i, src_pix_fmt, has_alpha) & loss_mask;
739
            if (loss == 0) {
740
                dist = avg_bits_per_pixel(i);
741
                if (dist < min_dist) {
742
                    min_dist = dist;
743
                    dst_pix_fmt = i;
744
                }
745
            }
746
        }
747
    }
748
    return dst_pix_fmt;
749
}
750

    
751
enum PixelFormat avcodec_find_best_pix_fmt(int64_t pix_fmt_mask, enum PixelFormat src_pix_fmt,
752
                              int has_alpha, int *loss_ptr)
753
{
754
    enum PixelFormat dst_pix_fmt;
755
    int loss_mask, i;
756
    static const int loss_mask_order[] = {
757
        ~0, /* no loss first */
758
        ~FF_LOSS_ALPHA,
759
        ~FF_LOSS_RESOLUTION,
760
        ~(FF_LOSS_COLORSPACE | FF_LOSS_RESOLUTION),
761
        ~FF_LOSS_COLORQUANT,
762
        ~FF_LOSS_DEPTH,
763
        0,
764
    };
765

    
766
    /* try with successive loss */
767
    i = 0;
768
    for(;;) {
769
        loss_mask = loss_mask_order[i++];
770
        dst_pix_fmt = avcodec_find_best_pix_fmt1(pix_fmt_mask, src_pix_fmt,
771
                                                 has_alpha, loss_mask);
772
        if (dst_pix_fmt >= 0)
773
            goto found;
774
        if (loss_mask == 0)
775
            break;
776
    }
777
    return PIX_FMT_NONE;
778
 found:
779
    if (loss_ptr)
780
        *loss_ptr = avcodec_get_pix_fmt_loss(dst_pix_fmt, src_pix_fmt, has_alpha);
781
    return dst_pix_fmt;
782
}
783

    
784
#if LIBAVCODEC_VERSION_MAJOR < 53
785
void ff_img_copy_plane(uint8_t *dst, int dst_wrap,
786
                           const uint8_t *src, int src_wrap,
787
                           int width, int height)
788
{
789
    av_image_copy_plane(dst, dst_wrap, src, src_wrap, width, height);
790
}
791

    
792
int ff_get_plane_bytewidth(enum PixelFormat pix_fmt, int width, int plane)
793
{
794
    return av_image_get_linesize(pix_fmt, width, plane);
795
}
796

    
797
void av_picture_data_copy(uint8_t *dst_data[4], int dst_linesize[4],
798
                          uint8_t *src_data[4], int src_linesize[4],
799
                          enum PixelFormat pix_fmt, int width, int height)
800
{
801
    av_image_copy(dst_data, dst_linesize, src_data, src_linesize,
802
                  pix_fmt, width, height);
803
}
804
#endif
805

    
806
void av_picture_copy(AVPicture *dst, const AVPicture *src,
807
                     enum PixelFormat pix_fmt, int width, int height)
808
{
809
    av_image_copy(dst->data, dst->linesize, src->data,
810
                         src->linesize, pix_fmt, width, height);
811
}
812

    
813
/* 2x2 -> 1x1 */
814
void ff_shrink22(uint8_t *dst, int dst_wrap,
815
                     const uint8_t *src, int src_wrap,
816
                     int width, int height)
817
{
818
    int w;
819
    const uint8_t *s1, *s2;
820
    uint8_t *d;
821

    
822
    for(;height > 0; height--) {
823
        s1 = src;
824
        s2 = s1 + src_wrap;
825
        d = dst;
826
        for(w = width;w >= 4; w-=4) {
827
            d[0] = (s1[0] + s1[1] + s2[0] + s2[1] + 2) >> 2;
828
            d[1] = (s1[2] + s1[3] + s2[2] + s2[3] + 2) >> 2;
829
            d[2] = (s1[4] + s1[5] + s2[4] + s2[5] + 2) >> 2;
830
            d[3] = (s1[6] + s1[7] + s2[6] + s2[7] + 2) >> 2;
831
            s1 += 8;
832
            s2 += 8;
833
            d += 4;
834
        }
835
        for(;w > 0; w--) {
836
            d[0] = (s1[0] + s1[1] + s2[0] + s2[1] + 2) >> 2;
837
            s1 += 2;
838
            s2 += 2;
839
            d++;
840
        }
841
        src += 2 * src_wrap;
842
        dst += dst_wrap;
843
    }
844
}
845

    
846
/* 4x4 -> 1x1 */
847
void ff_shrink44(uint8_t *dst, int dst_wrap,
848
                     const uint8_t *src, int src_wrap,
849
                     int width, int height)
850
{
851
    int w;
852
    const uint8_t *s1, *s2, *s3, *s4;
853
    uint8_t *d;
854

    
855
    for(;height > 0; height--) {
856
        s1 = src;
857
        s2 = s1 + src_wrap;
858
        s3 = s2 + src_wrap;
859
        s4 = s3 + src_wrap;
860
        d = dst;
861
        for(w = width;w > 0; w--) {
862
            d[0] = (s1[0] + s1[1] + s1[2] + s1[3] +
863
                    s2[0] + s2[1] + s2[2] + s2[3] +
864
                    s3[0] + s3[1] + s3[2] + s3[3] +
865
                    s4[0] + s4[1] + s4[2] + s4[3] + 8) >> 4;
866
            s1 += 4;
867
            s2 += 4;
868
            s3 += 4;
869
            s4 += 4;
870
            d++;
871
        }
872
        src += 4 * src_wrap;
873
        dst += dst_wrap;
874
    }
875
}
876

    
877
/* 8x8 -> 1x1 */
878
void ff_shrink88(uint8_t *dst, int dst_wrap,
879
                     const uint8_t *src, int src_wrap,
880
                     int width, int height)
881
{
882
    int w, i;
883

    
884
    for(;height > 0; height--) {
885
        for(w = width;w > 0; w--) {
886
            int tmp=0;
887
            for(i=0; i<8; i++){
888
                tmp += src[0] + src[1] + src[2] + src[3] + src[4] + src[5] + src[6] + src[7];
889
                src += src_wrap;
890
            }
891
            *(dst++) = (tmp + 32)>>6;
892
            src += 8 - 8*src_wrap;
893
        }
894
        src += 8*src_wrap - 8*width;
895
        dst += dst_wrap - width;
896
    }
897
}
898

    
899

    
900
int avpicture_alloc(AVPicture *picture,
901
                    enum PixelFormat pix_fmt, int width, int height)
902
{
903
    int size;
904
    void *ptr;
905

    
906
    size = avpicture_fill(picture, NULL, pix_fmt, width, height);
907
    if(size<0)
908
        goto fail;
909
    ptr = av_malloc(size);
910
    if (!ptr)
911
        goto fail;
912
    avpicture_fill(picture, ptr, pix_fmt, width, height);
913
    if(picture->data[1] && !picture->data[2])
914
        ff_set_systematic_pal((uint32_t*)picture->data[1], pix_fmt);
915

    
916
    return 0;
917
 fail:
918
    memset(picture, 0, sizeof(AVPicture));
919
    return -1;
920
}
921

    
922
void avpicture_free(AVPicture *picture)
923
{
924
    av_free(picture->data[0]);
925
}
926

    
927
/* return true if yuv planar */
928
static inline int is_yuv_planar(const PixFmtInfo *ps)
929
{
930
    return (ps->color_type == FF_COLOR_YUV ||
931
            ps->color_type == FF_COLOR_YUV_JPEG) &&
932
        ps->pixel_type == FF_PIXEL_PLANAR;
933
}
934

    
935
int av_picture_crop(AVPicture *dst, const AVPicture *src,
936
                    enum PixelFormat pix_fmt, int top_band, int left_band)
937
{
938
    int y_shift;
939
    int x_shift;
940

    
941
    if (pix_fmt < 0 || pix_fmt >= PIX_FMT_NB || !is_yuv_planar(&pix_fmt_info[pix_fmt]))
942
        return -1;
943

    
944
    y_shift = av_pix_fmt_descriptors[pix_fmt].log2_chroma_h;
945
    x_shift = av_pix_fmt_descriptors[pix_fmt].log2_chroma_w;
946

    
947
    dst->data[0] = src->data[0] + (top_band * src->linesize[0]) + left_band;
948
    dst->data[1] = src->data[1] + ((top_band >> y_shift) * src->linesize[1]) + (left_band >> x_shift);
949
    dst->data[2] = src->data[2] + ((top_band >> y_shift) * src->linesize[2]) + (left_band >> x_shift);
950

    
951
    dst->linesize[0] = src->linesize[0];
952
    dst->linesize[1] = src->linesize[1];
953
    dst->linesize[2] = src->linesize[2];
954
    return 0;
955
}
956

    
957
int av_picture_pad(AVPicture *dst, const AVPicture *src, int height, int width,
958
                   enum PixelFormat pix_fmt, int padtop, int padbottom, int padleft, int padright,
959
            int *color)
960
{
961
    uint8_t *optr;
962
    int y_shift;
963
    int x_shift;
964
    int yheight;
965
    int i, y;
966

    
967
    if (pix_fmt < 0 || pix_fmt >= PIX_FMT_NB ||
968
        !is_yuv_planar(&pix_fmt_info[pix_fmt])) return -1;
969

    
970
    for (i = 0; i < 3; i++) {
971
        x_shift = i ? av_pix_fmt_descriptors[pix_fmt].log2_chroma_w : 0;
972
        y_shift = i ? av_pix_fmt_descriptors[pix_fmt].log2_chroma_h : 0;
973

    
974
        if (padtop || padleft) {
975
            memset(dst->data[i], color[i],
976
                dst->linesize[i] * (padtop >> y_shift) + (padleft >> x_shift));
977
        }
978

    
979
        if (padleft || padright) {
980
            optr = dst->data[i] + dst->linesize[i] * (padtop >> y_shift) +
981
                (dst->linesize[i] - (padright >> x_shift));
982
            yheight = (height - 1 - (padtop + padbottom)) >> y_shift;
983
            for (y = 0; y < yheight; y++) {
984
                memset(optr, color[i], (padleft + padright) >> x_shift);
985
                optr += dst->linesize[i];
986
            }
987
        }
988

    
989
        if (src) { /* first line */
990
            uint8_t *iptr = src->data[i];
991
            optr = dst->data[i] + dst->linesize[i] * (padtop >> y_shift) +
992
                    (padleft >> x_shift);
993
            memcpy(optr, iptr, (width - padleft - padright) >> x_shift);
994
            iptr += src->linesize[i];
995
            optr = dst->data[i] + dst->linesize[i] * (padtop >> y_shift) +
996
                (dst->linesize[i] - (padright >> x_shift));
997
            yheight = (height - 1 - (padtop + padbottom)) >> y_shift;
998
            for (y = 0; y < yheight; y++) {
999
                memset(optr, color[i], (padleft + padright) >> x_shift);
1000
                memcpy(optr + ((padleft + padright) >> x_shift), iptr,
1001
                       (width - padleft - padright) >> x_shift);
1002
                iptr += src->linesize[i];
1003
                optr += dst->linesize[i];
1004
            }
1005
        }
1006

    
1007
        if (padbottom || padright) {
1008
            optr = dst->data[i] + dst->linesize[i] *
1009
                ((height - padbottom) >> y_shift) - (padright >> x_shift);
1010
            memset(optr, color[i],dst->linesize[i] *
1011
                (padbottom >> y_shift) + (padright >> x_shift));
1012
        }
1013
    }
1014
    return 0;
1015
}
1016

    
1017
/* NOTE: we scan all the pixels to have an exact information */
1018
static int get_alpha_info_pal8(const AVPicture *src, int width, int height)
1019
{
1020
    const unsigned char *p;
1021
    int src_wrap, ret, x, y;
1022
    unsigned int a;
1023
    uint32_t *palette = (uint32_t *)src->data[1];
1024

    
1025
    p = src->data[0];
1026
    src_wrap = src->linesize[0] - width;
1027
    ret = 0;
1028
    for(y=0;y<height;y++) {
1029
        for(x=0;x<width;x++) {
1030
            a = palette[p[0]] >> 24;
1031
            if (a == 0x00) {
1032
                ret |= FF_ALPHA_TRANSP;
1033
            } else if (a != 0xff) {
1034
                ret |= FF_ALPHA_SEMI_TRANSP;
1035
            }
1036
            p++;
1037
        }
1038
        p += src_wrap;
1039
    }
1040
    return ret;
1041
}
1042

    
1043
int img_get_alpha_info(const AVPicture *src,
1044
                       enum PixelFormat pix_fmt, int width, int height)
1045
{
1046
    const PixFmtInfo *pf = &pix_fmt_info[pix_fmt];
1047
    int ret;
1048

    
1049
    /* no alpha can be represented in format */
1050
    if (!pf->is_alpha)
1051
        return 0;
1052
    switch(pix_fmt) {
1053
    case PIX_FMT_PAL8:
1054
        ret = get_alpha_info_pal8(src, width, height);
1055
        break;
1056
    default:
1057
        /* we do not know, so everything is indicated */
1058
        ret = FF_ALPHA_TRANSP | FF_ALPHA_SEMI_TRANSP;
1059
        break;
1060
    }
1061
    return ret;
1062
}
1063

    
1064
#if !(HAVE_MMX && HAVE_YASM)
1065
/* filter parameters: [-1 4 2 4 -1] // 8 */
1066
static void deinterlace_line_c(uint8_t *dst,
1067
                             const uint8_t *lum_m4, const uint8_t *lum_m3,
1068
                             const uint8_t *lum_m2, const uint8_t *lum_m1,
1069
                             const uint8_t *lum,
1070
                             int size)
1071
{
1072
    uint8_t *cm = ff_cropTbl + MAX_NEG_CROP;
1073
    int sum;
1074

    
1075
    for(;size > 0;size--) {
1076
        sum = -lum_m4[0];
1077
        sum += lum_m3[0] << 2;
1078
        sum += lum_m2[0] << 1;
1079
        sum += lum_m1[0] << 2;
1080
        sum += -lum[0];
1081
        dst[0] = cm[(sum + 4) >> 3];
1082
        lum_m4++;
1083
        lum_m3++;
1084
        lum_m2++;
1085
        lum_m1++;
1086
        lum++;
1087
        dst++;
1088
    }
1089
}
1090

    
1091
static void deinterlace_line_inplace_c(uint8_t *lum_m4, uint8_t *lum_m3,
1092
                                       uint8_t *lum_m2, uint8_t *lum_m1,
1093
                                       uint8_t *lum, int size)
1094
{
1095
    uint8_t *cm = ff_cropTbl + MAX_NEG_CROP;
1096
    int sum;
1097

    
1098
    for(;size > 0;size--) {
1099
        sum = -lum_m4[0];
1100
        sum += lum_m3[0] << 2;
1101
        sum += lum_m2[0] << 1;
1102
        lum_m4[0]=lum_m2[0];
1103
        sum += lum_m1[0] << 2;
1104
        sum += -lum[0];
1105
        lum_m2[0] = cm[(sum + 4) >> 3];
1106
        lum_m4++;
1107
        lum_m3++;
1108
        lum_m2++;
1109
        lum_m1++;
1110
        lum++;
1111
    }
1112
}
1113
#endif
1114

    
1115
/* deinterlacing : 2 temporal taps, 3 spatial taps linear filter. The
1116
   top field is copied as is, but the bottom field is deinterlaced
1117
   against the top field. */
1118
static void deinterlace_bottom_field(uint8_t *dst, int dst_wrap,
1119
                                    const uint8_t *src1, int src_wrap,
1120
                                    int width, int height)
1121
{
1122
    const uint8_t *src_m2, *src_m1, *src_0, *src_p1, *src_p2;
1123
    int y;
1124

    
1125
    src_m2 = src1;
1126
    src_m1 = src1;
1127
    src_0=&src_m1[src_wrap];
1128
    src_p1=&src_0[src_wrap];
1129
    src_p2=&src_p1[src_wrap];
1130
    for(y=0;y<(height-2);y+=2) {
1131
        memcpy(dst,src_m1,width);
1132
        dst += dst_wrap;
1133
        deinterlace_line(dst,src_m2,src_m1,src_0,src_p1,src_p2,width);
1134
        src_m2 = src_0;
1135
        src_m1 = src_p1;
1136
        src_0 = src_p2;
1137
        src_p1 += 2*src_wrap;
1138
        src_p2 += 2*src_wrap;
1139
        dst += dst_wrap;
1140
    }
1141
    memcpy(dst,src_m1,width);
1142
    dst += dst_wrap;
1143
    /* do last line */
1144
    deinterlace_line(dst,src_m2,src_m1,src_0,src_0,src_0,width);
1145
}
1146

    
1147
static void deinterlace_bottom_field_inplace(uint8_t *src1, int src_wrap,
1148
                                             int width, int height)
1149
{
1150
    uint8_t *src_m1, *src_0, *src_p1, *src_p2;
1151
    int y;
1152
    uint8_t *buf;
1153
    buf = (uint8_t*)av_malloc(width);
1154

    
1155
    src_m1 = src1;
1156
    memcpy(buf,src_m1,width);
1157
    src_0=&src_m1[src_wrap];
1158
    src_p1=&src_0[src_wrap];
1159
    src_p2=&src_p1[src_wrap];
1160
    for(y=0;y<(height-2);y+=2) {
1161
        deinterlace_line_inplace(buf,src_m1,src_0,src_p1,src_p2,width);
1162
        src_m1 = src_p1;
1163
        src_0 = src_p2;
1164
        src_p1 += 2*src_wrap;
1165
        src_p2 += 2*src_wrap;
1166
    }
1167
    /* do last line */
1168
    deinterlace_line_inplace(buf,src_m1,src_0,src_0,src_0,width);
1169
    av_free(buf);
1170
}
1171

    
1172
int avpicture_deinterlace(AVPicture *dst, const AVPicture *src,
1173
                          enum PixelFormat pix_fmt, int width, int height)
1174
{
1175
    int i;
1176

    
1177
    if (pix_fmt != PIX_FMT_YUV420P &&
1178
        pix_fmt != PIX_FMT_YUV422P &&
1179
        pix_fmt != PIX_FMT_YUV444P &&
1180
        pix_fmt != PIX_FMT_YUV411P &&
1181
        pix_fmt != PIX_FMT_GRAY8)
1182
        return -1;
1183
    if ((width & 3) != 0 || (height & 3) != 0)
1184
        return -1;
1185

    
1186
    for(i=0;i<3;i++) {
1187
        if (i == 1) {
1188
            switch(pix_fmt) {
1189
            case PIX_FMT_YUV420P:
1190
                width >>= 1;
1191
                height >>= 1;
1192
                break;
1193
            case PIX_FMT_YUV422P:
1194
                width >>= 1;
1195
                break;
1196
            case PIX_FMT_YUV411P:
1197
                width >>= 2;
1198
                break;
1199
            default:
1200
                break;
1201
            }
1202
            if (pix_fmt == PIX_FMT_GRAY8) {
1203
                break;
1204
            }
1205
        }
1206
        if (src == dst) {
1207
            deinterlace_bottom_field_inplace(dst->data[i], dst->linesize[i],
1208
                                 width, height);
1209
        } else {
1210
            deinterlace_bottom_field(dst->data[i],dst->linesize[i],
1211
                                        src->data[i], src->linesize[i],
1212
                                        width, height);
1213
        }
1214
    }
1215
    emms_c();
1216
    return 0;
1217
}
1218