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1 | /* |
2 | * Misc image conversion routines | |
3 | * Copyright (c) 2001, 2002, 2003 Fabrice Bellard | |
4 | * | |
5 | * This file is part of FFmpeg. | |
6 | * | |
7 | * FFmpeg is free software; you can redistribute it and/or | |
8 | * modify it under the terms of the GNU Lesser General Public | |
9 | * License as published by the Free Software Foundation; either | |
10 | * version 2.1 of the License, or (at your option) any later version. | |
11 | * | |
12 | * FFmpeg is distributed in the hope that it will be useful, | |
13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
15 | * Lesser General Public License for more details. | |
16 | * | |
17 | * You should have received a copy of the GNU Lesser General Public | |
18 | * License along with FFmpeg; if not, write to the Free Software | |
19 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | |
20 | */ | |
21 | ||
22 | /** | |
23 | * @file | |
24 | * misc image conversion routines | |
25 | */ | |
26 | ||
27 | /* TODO: | |
28 | * - write 'ffimg' program to test all the image related stuff | |
29 | * - move all api to slice based system | |
30 | * - integrate deinterlacing, postprocessing and scaling in the conversion process | |
31 | */ | |
32 | ||
33 | #include "avcodec.h" | |
34 | #include "imgconvert.h" | |
35 | #include "internal.h" | |
36 | #include "mathops.h" | |
37 | #include "libavutil/avassert.h" | |
38 | #include "libavutil/colorspace.h" | |
39 | #include "libavutil/common.h" | |
40 | #include "libavutil/pixdesc.h" | |
41 | #include "libavutil/imgutils.h" | |
42 | ||
43 | void avcodec_get_chroma_sub_sample(enum AVPixelFormat pix_fmt, int *h_shift, int *v_shift) | |
44 | { | |
45 | const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(pix_fmt); | |
46 | av_assert0(desc); | |
47 | *h_shift = desc->log2_chroma_w; | |
48 | *v_shift = desc->log2_chroma_h; | |
49 | } | |
50 | ||
51 | int avcodec_get_pix_fmt_loss(enum AVPixelFormat dst_pix_fmt, | |
52 | enum AVPixelFormat src_pix_fmt, | |
53 | int has_alpha) | |
54 | { | |
55 | return av_get_pix_fmt_loss(dst_pix_fmt, src_pix_fmt, has_alpha); | |
56 | } | |
57 | ||
58 | enum AVPixelFormat avcodec_find_best_pix_fmt_of_2(enum AVPixelFormat dst_pix_fmt1, enum AVPixelFormat dst_pix_fmt2, | |
59 | enum AVPixelFormat src_pix_fmt, int has_alpha, int *loss_ptr) | |
60 | { | |
61 | return av_find_best_pix_fmt_of_2(dst_pix_fmt1, dst_pix_fmt2, src_pix_fmt, has_alpha, loss_ptr); | |
62 | } | |
63 | ||
64 | #if AV_HAVE_INCOMPATIBLE_LIBAV_ABI | |
65 | enum AVPixelFormat avcodec_find_best_pix_fmt2(const enum AVPixelFormat *pix_fmt_list, | |
66 | enum AVPixelFormat src_pix_fmt, | |
67 | int has_alpha, int *loss_ptr){ | |
68 | return avcodec_find_best_pix_fmt_of_list(pix_fmt_list, src_pix_fmt, has_alpha, loss_ptr); | |
69 | } | |
70 | #else | |
71 | enum AVPixelFormat avcodec_find_best_pix_fmt2(enum AVPixelFormat dst_pix_fmt1, enum AVPixelFormat dst_pix_fmt2, | |
72 | enum AVPixelFormat src_pix_fmt, int has_alpha, int *loss_ptr) | |
73 | { | |
74 | return avcodec_find_best_pix_fmt_of_2(dst_pix_fmt1, dst_pix_fmt2, src_pix_fmt, has_alpha, loss_ptr); | |
75 | } | |
76 | #endif | |
77 | ||
78 | enum AVPixelFormat avcodec_find_best_pix_fmt_of_list(const enum AVPixelFormat *pix_fmt_list, | |
79 | enum AVPixelFormat src_pix_fmt, | |
80 | int has_alpha, int *loss_ptr){ | |
81 | int i; | |
82 | ||
83 | enum AVPixelFormat best = AV_PIX_FMT_NONE; | |
84 | ||
85 | for(i=0; pix_fmt_list[i] != AV_PIX_FMT_NONE; i++) | |
86 | best = avcodec_find_best_pix_fmt_of_2(best, pix_fmt_list[i], src_pix_fmt, has_alpha, loss_ptr); | |
87 | ||
88 | return best; | |
89 | } | |
90 | ||
91 | /* 2x2 -> 1x1 */ | |
92 | void ff_shrink22(uint8_t *dst, int dst_wrap, | |
93 | const uint8_t *src, int src_wrap, | |
94 | int width, int height) | |
95 | { | |
96 | int w; | |
97 | const uint8_t *s1, *s2; | |
98 | uint8_t *d; | |
99 | ||
100 | for(;height > 0; height--) { | |
101 | s1 = src; | |
102 | s2 = s1 + src_wrap; | |
103 | d = dst; | |
104 | for(w = width;w >= 4; w-=4) { | |
105 | d[0] = (s1[0] + s1[1] + s2[0] + s2[1] + 2) >> 2; | |
106 | d[1] = (s1[2] + s1[3] + s2[2] + s2[3] + 2) >> 2; | |
107 | d[2] = (s1[4] + s1[5] + s2[4] + s2[5] + 2) >> 2; | |
108 | d[3] = (s1[6] + s1[7] + s2[6] + s2[7] + 2) >> 2; | |
109 | s1 += 8; | |
110 | s2 += 8; | |
111 | d += 4; | |
112 | } | |
113 | for(;w > 0; w--) { | |
114 | d[0] = (s1[0] + s1[1] + s2[0] + s2[1] + 2) >> 2; | |
115 | s1 += 2; | |
116 | s2 += 2; | |
117 | d++; | |
118 | } | |
119 | src += 2 * src_wrap; | |
120 | dst += dst_wrap; | |
121 | } | |
122 | } | |
123 | ||
124 | /* 4x4 -> 1x1 */ | |
125 | void ff_shrink44(uint8_t *dst, int dst_wrap, | |
126 | const uint8_t *src, int src_wrap, | |
127 | int width, int height) | |
128 | { | |
129 | int w; | |
130 | const uint8_t *s1, *s2, *s3, *s4; | |
131 | uint8_t *d; | |
132 | ||
133 | for(;height > 0; height--) { | |
134 | s1 = src; | |
135 | s2 = s1 + src_wrap; | |
136 | s3 = s2 + src_wrap; | |
137 | s4 = s3 + src_wrap; | |
138 | d = dst; | |
139 | for(w = width;w > 0; w--) { | |
140 | d[0] = (s1[0] + s1[1] + s1[2] + s1[3] + | |
141 | s2[0] + s2[1] + s2[2] + s2[3] + | |
142 | s3[0] + s3[1] + s3[2] + s3[3] + | |
143 | s4[0] + s4[1] + s4[2] + s4[3] + 8) >> 4; | |
144 | s1 += 4; | |
145 | s2 += 4; | |
146 | s3 += 4; | |
147 | s4 += 4; | |
148 | d++; | |
149 | } | |
150 | src += 4 * src_wrap; | |
151 | dst += dst_wrap; | |
152 | } | |
153 | } | |
154 | ||
155 | /* 8x8 -> 1x1 */ | |
156 | void ff_shrink88(uint8_t *dst, int dst_wrap, | |
157 | const uint8_t *src, int src_wrap, | |
158 | int width, int height) | |
159 | { | |
160 | int w, i; | |
161 | ||
162 | for(;height > 0; height--) { | |
163 | for(w = width;w > 0; w--) { | |
164 | int tmp=0; | |
165 | for(i=0; i<8; i++){ | |
166 | tmp += src[0] + src[1] + src[2] + src[3] + src[4] + src[5] + src[6] + src[7]; | |
167 | src += src_wrap; | |
168 | } | |
169 | *(dst++) = (tmp + 32)>>6; | |
170 | src += 8 - 8*src_wrap; | |
171 | } | |
172 | src += 8*src_wrap - 8*width; | |
173 | dst += dst_wrap - width; | |
174 | } | |
175 | } | |
176 | ||
177 | /* return true if yuv planar */ | |
178 | static inline int is_yuv_planar(const AVPixFmtDescriptor *desc) | |
179 | { | |
180 | int i; | |
181 | int planes[4] = { 0 }; | |
182 | ||
183 | if ( desc->flags & AV_PIX_FMT_FLAG_RGB | |
184 | || !(desc->flags & AV_PIX_FMT_FLAG_PLANAR)) | |
185 | return 0; | |
186 | ||
187 | /* set the used planes */ | |
188 | for (i = 0; i < desc->nb_components; i++) | |
189 | planes[desc->comp[i].plane] = 1; | |
190 | ||
191 | /* if there is an unused plane, the format is not planar */ | |
192 | for (i = 0; i < desc->nb_components; i++) | |
193 | if (!planes[i]) | |
194 | return 0; | |
195 | return 1; | |
196 | } | |
197 | ||
198 | int av_picture_crop(AVPicture *dst, const AVPicture *src, | |
199 | enum AVPixelFormat pix_fmt, int top_band, int left_band) | |
200 | { | |
201 | const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(pix_fmt); | |
202 | int y_shift; | |
203 | int x_shift; | |
204 | ||
205 | if (pix_fmt < 0 || pix_fmt >= AV_PIX_FMT_NB) | |
206 | return -1; | |
207 | ||
208 | y_shift = desc->log2_chroma_h; | |
209 | x_shift = desc->log2_chroma_w; | |
210 | ||
211 | if (is_yuv_planar(desc)) { | |
212 | dst->data[0] = src->data[0] + (top_band * src->linesize[0]) + left_band; | |
213 | dst->data[1] = src->data[1] + ((top_band >> y_shift) * src->linesize[1]) + (left_band >> x_shift); | |
214 | dst->data[2] = src->data[2] + ((top_band >> y_shift) * src->linesize[2]) + (left_band >> x_shift); | |
215 | } else{ | |
216 | if(top_band % (1<<y_shift) || left_band % (1<<x_shift)) | |
217 | return -1; | |
218 | if(left_band) //FIXME add support for this too | |
219 | return -1; | |
220 | dst->data[0] = src->data[0] + (top_band * src->linesize[0]) + left_band; | |
221 | } | |
222 | ||
223 | dst->linesize[0] = src->linesize[0]; | |
224 | dst->linesize[1] = src->linesize[1]; | |
225 | dst->linesize[2] = src->linesize[2]; | |
226 | return 0; | |
227 | } | |
228 | ||
229 | int av_picture_pad(AVPicture *dst, const AVPicture *src, int height, int width, | |
230 | enum AVPixelFormat pix_fmt, int padtop, int padbottom, int padleft, int padright, | |
231 | int *color) | |
232 | { | |
233 | const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(pix_fmt); | |
234 | uint8_t *optr; | |
235 | int y_shift; | |
236 | int x_shift; | |
237 | int yheight; | |
238 | int i, y; | |
239 | ||
240 | if (pix_fmt < 0 || pix_fmt >= AV_PIX_FMT_NB || | |
241 | !is_yuv_planar(desc)) return -1; | |
242 | ||
243 | for (i = 0; i < 3; i++) { | |
244 | x_shift = i ? desc->log2_chroma_w : 0; | |
245 | y_shift = i ? desc->log2_chroma_h : 0; | |
246 | ||
247 | if (padtop || padleft) { | |
248 | memset(dst->data[i], color[i], | |
249 | dst->linesize[i] * (padtop >> y_shift) + (padleft >> x_shift)); | |
250 | } | |
251 | ||
252 | if (padleft || padright) { | |
253 | optr = dst->data[i] + dst->linesize[i] * (padtop >> y_shift) + | |
254 | (dst->linesize[i] - (padright >> x_shift)); | |
255 | yheight = (height - 1 - (padtop + padbottom)) >> y_shift; | |
256 | for (y = 0; y < yheight; y++) { | |
257 | memset(optr, color[i], (padleft + padright) >> x_shift); | |
258 | optr += dst->linesize[i]; | |
259 | } | |
260 | } | |
261 | ||
262 | if (src) { /* first line */ | |
263 | uint8_t *iptr = src->data[i]; | |
264 | optr = dst->data[i] + dst->linesize[i] * (padtop >> y_shift) + | |
265 | (padleft >> x_shift); | |
266 | memcpy(optr, iptr, (width - padleft - padright) >> x_shift); | |
267 | iptr += src->linesize[i]; | |
268 | optr = dst->data[i] + dst->linesize[i] * (padtop >> y_shift) + | |
269 | (dst->linesize[i] - (padright >> x_shift)); | |
270 | yheight = (height - 1 - (padtop + padbottom)) >> y_shift; | |
271 | for (y = 0; y < yheight; y++) { | |
272 | memset(optr, color[i], (padleft + padright) >> x_shift); | |
273 | memcpy(optr + ((padleft + padright) >> x_shift), iptr, | |
274 | (width - padleft - padright) >> x_shift); | |
275 | iptr += src->linesize[i]; | |
276 | optr += dst->linesize[i]; | |
277 | } | |
278 | } | |
279 | ||
280 | if (padbottom || padright) { | |
281 | optr = dst->data[i] + dst->linesize[i] * | |
282 | ((height - padbottom) >> y_shift) - (padright >> x_shift); | |
283 | memset(optr, color[i],dst->linesize[i] * | |
284 | (padbottom >> y_shift) + (padright >> x_shift)); | |
285 | } | |
286 | } | |
287 | return 0; | |
288 | } | |
289 | ||
290 | #if FF_API_DEINTERLACE | |
291 | ||
292 | #if HAVE_MMX_EXTERNAL | |
293 | #define deinterlace_line_inplace ff_deinterlace_line_inplace_mmx | |
294 | #define deinterlace_line ff_deinterlace_line_mmx | |
295 | #else | |
296 | #define deinterlace_line_inplace deinterlace_line_inplace_c | |
297 | #define deinterlace_line deinterlace_line_c | |
298 | ||
299 | /* filter parameters: [-1 4 2 4 -1] // 8 */ | |
300 | static void deinterlace_line_c(uint8_t *dst, | |
301 | const uint8_t *lum_m4, const uint8_t *lum_m3, | |
302 | const uint8_t *lum_m2, const uint8_t *lum_m1, | |
303 | const uint8_t *lum, | |
304 | int size) | |
305 | { | |
306 | const uint8_t *cm = ff_crop_tab + MAX_NEG_CROP; | |
307 | int sum; | |
308 | ||
309 | for(;size > 0;size--) { | |
310 | sum = -lum_m4[0]; | |
311 | sum += lum_m3[0] << 2; | |
312 | sum += lum_m2[0] << 1; | |
313 | sum += lum_m1[0] << 2; | |
314 | sum += -lum[0]; | |
315 | dst[0] = cm[(sum + 4) >> 3]; | |
316 | lum_m4++; | |
317 | lum_m3++; | |
318 | lum_m2++; | |
319 | lum_m1++; | |
320 | lum++; | |
321 | dst++; | |
322 | } | |
323 | } | |
324 | ||
325 | static void deinterlace_line_inplace_c(uint8_t *lum_m4, uint8_t *lum_m3, | |
326 | uint8_t *lum_m2, uint8_t *lum_m1, | |
327 | uint8_t *lum, int size) | |
328 | { | |
329 | const uint8_t *cm = ff_crop_tab + MAX_NEG_CROP; | |
330 | int sum; | |
331 | ||
332 | for(;size > 0;size--) { | |
333 | sum = -lum_m4[0]; | |
334 | sum += lum_m3[0] << 2; | |
335 | sum += lum_m2[0] << 1; | |
336 | lum_m4[0]=lum_m2[0]; | |
337 | sum += lum_m1[0] << 2; | |
338 | sum += -lum[0]; | |
339 | lum_m2[0] = cm[(sum + 4) >> 3]; | |
340 | lum_m4++; | |
341 | lum_m3++; | |
342 | lum_m2++; | |
343 | lum_m1++; | |
344 | lum++; | |
345 | } | |
346 | } | |
347 | #endif /* !HAVE_MMX_EXTERNAL */ | |
348 | ||
349 | /* deinterlacing : 2 temporal taps, 3 spatial taps linear filter. The | |
350 | top field is copied as is, but the bottom field is deinterlaced | |
351 | against the top field. */ | |
352 | static void deinterlace_bottom_field(uint8_t *dst, int dst_wrap, | |
353 | const uint8_t *src1, int src_wrap, | |
354 | int width, int height) | |
355 | { | |
356 | const uint8_t *src_m2, *src_m1, *src_0, *src_p1, *src_p2; | |
357 | int y; | |
358 | ||
359 | src_m2 = src1; | |
360 | src_m1 = src1; | |
361 | src_0=&src_m1[src_wrap]; | |
362 | src_p1=&src_0[src_wrap]; | |
363 | src_p2=&src_p1[src_wrap]; | |
364 | for(y=0;y<(height-2);y+=2) { | |
365 | memcpy(dst,src_m1,width); | |
366 | dst += dst_wrap; | |
367 | deinterlace_line(dst,src_m2,src_m1,src_0,src_p1,src_p2,width); | |
368 | src_m2 = src_0; | |
369 | src_m1 = src_p1; | |
370 | src_0 = src_p2; | |
371 | src_p1 += 2*src_wrap; | |
372 | src_p2 += 2*src_wrap; | |
373 | dst += dst_wrap; | |
374 | } | |
375 | memcpy(dst,src_m1,width); | |
376 | dst += dst_wrap; | |
377 | /* do last line */ | |
378 | deinterlace_line(dst,src_m2,src_m1,src_0,src_0,src_0,width); | |
379 | } | |
380 | ||
381 | static void deinterlace_bottom_field_inplace(uint8_t *src1, int src_wrap, | |
382 | int width, int height) | |
383 | { | |
384 | uint8_t *src_m1, *src_0, *src_p1, *src_p2; | |
385 | int y; | |
386 | uint8_t *buf; | |
387 | buf = av_malloc(width); | |
388 | ||
389 | src_m1 = src1; | |
390 | memcpy(buf,src_m1,width); | |
391 | src_0=&src_m1[src_wrap]; | |
392 | src_p1=&src_0[src_wrap]; | |
393 | src_p2=&src_p1[src_wrap]; | |
394 | for(y=0;y<(height-2);y+=2) { | |
395 | deinterlace_line_inplace(buf,src_m1,src_0,src_p1,src_p2,width); | |
396 | src_m1 = src_p1; | |
397 | src_0 = src_p2; | |
398 | src_p1 += 2*src_wrap; | |
399 | src_p2 += 2*src_wrap; | |
400 | } | |
401 | /* do last line */ | |
402 | deinterlace_line_inplace(buf,src_m1,src_0,src_0,src_0,width); | |
403 | av_free(buf); | |
404 | } | |
405 | ||
406 | int avpicture_deinterlace(AVPicture *dst, const AVPicture *src, | |
407 | enum AVPixelFormat pix_fmt, int width, int height) | |
408 | { | |
409 | int i; | |
410 | ||
411 | if (pix_fmt != AV_PIX_FMT_YUV420P && | |
412 | pix_fmt != AV_PIX_FMT_YUVJ420P && | |
413 | pix_fmt != AV_PIX_FMT_YUV422P && | |
414 | pix_fmt != AV_PIX_FMT_YUVJ422P && | |
415 | pix_fmt != AV_PIX_FMT_YUV444P && | |
416 | pix_fmt != AV_PIX_FMT_YUV411P && | |
417 | pix_fmt != AV_PIX_FMT_GRAY8) | |
418 | return -1; | |
419 | if ((width & 3) != 0 || (height & 3) != 0) | |
420 | return -1; | |
421 | ||
422 | for(i=0;i<3;i++) { | |
423 | if (i == 1) { | |
424 | switch(pix_fmt) { | |
425 | case AV_PIX_FMT_YUVJ420P: | |
426 | case AV_PIX_FMT_YUV420P: | |
427 | width >>= 1; | |
428 | height >>= 1; | |
429 | break; | |
430 | case AV_PIX_FMT_YUV422P: | |
431 | case AV_PIX_FMT_YUVJ422P: | |
432 | width >>= 1; | |
433 | break; | |
434 | case AV_PIX_FMT_YUV411P: | |
435 | width >>= 2; | |
436 | break; | |
437 | default: | |
438 | break; | |
439 | } | |
440 | if (pix_fmt == AV_PIX_FMT_GRAY8) { | |
441 | break; | |
442 | } | |
443 | } | |
444 | if (src == dst) { | |
445 | deinterlace_bottom_field_inplace(dst->data[i], dst->linesize[i], | |
446 | width, height); | |
447 | } else { | |
448 | deinterlace_bottom_field(dst->data[i],dst->linesize[i], | |
449 | src->data[i], src->linesize[i], | |
450 | width, height); | |
451 | } | |
452 | } | |
453 | emms_c(); | |
454 | return 0; | |
455 | } | |
456 | ||
457 | #endif /* FF_API_DEINTERLACE */ | |
458 | ||
459 | #ifdef TEST | |
460 | ||
461 | int main(void){ | |
462 | int i; | |
463 | int err=0; | |
464 | int skip = 0; | |
465 | ||
466 | for (i=0; i<AV_PIX_FMT_NB*2; i++) { | |
467 | const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(i); | |
468 | if(!desc || !desc->name) { | |
469 | skip ++; | |
470 | continue; | |
471 | } | |
472 | if (skip) { | |
473 | av_log(NULL, AV_LOG_INFO, "%3d unused pixel format values\n", skip); | |
474 | skip = 0; | |
475 | } | |
476 | av_log(NULL, AV_LOG_INFO, "pix fmt %s yuv_plan:%d avg_bpp:%d\n", desc->name, is_yuv_planar(desc), av_get_padded_bits_per_pixel(desc)); | |
477 | if ((!(desc->flags & AV_PIX_FMT_FLAG_ALPHA)) != (desc->nb_components != 2 && desc->nb_components != 4)) { | |
478 | av_log(NULL, AV_LOG_ERROR, "Alpha flag mismatch\n"); | |
479 | err = 1; | |
480 | } | |
481 | } | |
482 | return err; | |
483 | } | |
484 | ||
485 | #endif |