2 * Misc image conversion routines
3 * Copyright (c) 2001, 2002, 2003 Fabrice Bellard
5 * This file is part of Libav.
7 * Libav 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.
12 * Libav 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.
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with Libav; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
24 * misc image conversion routines
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
36 #include "libavutil/colorspace.h"
37 #include "libavutil/common.h"
38 #include "libavutil/pixdesc.h"
39 #include "libavutil/imgutils.h"
42 #include "x86/dsputil_mmx.h"
45 #define FF_COLOR_RGB 0 /**< RGB color space */
46 #define FF_COLOR_GRAY 1 /**< gray color space */
47 #define FF_COLOR_YUV 2 /**< YUV color space. 16 <= Y <= 235, 16 <= U, V <= 240 */
48 #define FF_COLOR_YUV_JPEG 3 /**< YUV color space. 0 <= Y <= 255, 0 <= U, V <= 255 */
50 #define FF_PIXEL_PLANAR 0 /**< each channel has one component in AVPicture */
51 #define FF_PIXEL_PACKED 1 /**< only one components containing all the channels */
52 #define FF_PIXEL_PALETTE 2 /**< one components containing indexes for a palette */
55 #define deinterlace_line_inplace ff_deinterlace_line_inplace_mmx
56 #define deinterlace_line ff_deinterlace_line_mmx
58 #define deinterlace_line_inplace deinterlace_line_inplace_c
59 #define deinterlace_line deinterlace_line_c
62 typedef struct PixFmtInfo {
63 uint8_t nb_channels; /**< number of channels (including alpha) */
64 uint8_t color_type; /**< color type (see FF_COLOR_xxx constants) */
65 uint8_t pixel_type; /**< pixel storage type (see FF_PIXEL_xxx constants) */
66 uint8_t is_alpha : 1; /**< true if alpha can be specified */
67 uint8_t depth; /**< bit depth of the color components */
70 /* this table gives more information about formats */
71 static const PixFmtInfo pix_fmt_info[AV_PIX_FMT_NB] = {
73 [AV_PIX_FMT_YUV420P] = {
75 .color_type = FF_COLOR_YUV,
76 .pixel_type = FF_PIXEL_PLANAR,
79 [AV_PIX_FMT_YUV422P] = {
81 .color_type = FF_COLOR_YUV,
82 .pixel_type = FF_PIXEL_PLANAR,
85 [AV_PIX_FMT_YUV444P] = {
87 .color_type = FF_COLOR_YUV,
88 .pixel_type = FF_PIXEL_PLANAR,
91 [AV_PIX_FMT_YUYV422] = {
93 .color_type = FF_COLOR_YUV,
94 .pixel_type = FF_PIXEL_PACKED,
97 [AV_PIX_FMT_UYVY422] = {
99 .color_type = FF_COLOR_YUV,
100 .pixel_type = FF_PIXEL_PACKED,
103 [AV_PIX_FMT_YUV410P] = {
105 .color_type = FF_COLOR_YUV,
106 .pixel_type = FF_PIXEL_PLANAR,
109 [AV_PIX_FMT_YUV411P] = {
111 .color_type = FF_COLOR_YUV,
112 .pixel_type = FF_PIXEL_PLANAR,
115 [AV_PIX_FMT_YUV440P] = {
117 .color_type = FF_COLOR_YUV,
118 .pixel_type = FF_PIXEL_PLANAR,
121 [AV_PIX_FMT_YUV420P16LE] = {
123 .color_type = FF_COLOR_YUV,
124 .pixel_type = FF_PIXEL_PLANAR,
127 [AV_PIX_FMT_YUV422P16LE] = {
129 .color_type = FF_COLOR_YUV,
130 .pixel_type = FF_PIXEL_PLANAR,
133 [AV_PIX_FMT_YUV444P16LE] = {
135 .color_type = FF_COLOR_YUV,
136 .pixel_type = FF_PIXEL_PLANAR,
139 [AV_PIX_FMT_YUV420P16BE] = {
141 .color_type = FF_COLOR_YUV,
142 .pixel_type = FF_PIXEL_PLANAR,
145 [AV_PIX_FMT_YUV422P16BE] = {
147 .color_type = FF_COLOR_YUV,
148 .pixel_type = FF_PIXEL_PLANAR,
151 [AV_PIX_FMT_YUV444P16BE] = {
153 .color_type = FF_COLOR_YUV,
154 .pixel_type = FF_PIXEL_PLANAR,
159 /* YUV formats with alpha plane */
160 [AV_PIX_FMT_YUVA420P] = {
162 .color_type = FF_COLOR_YUV,
163 .pixel_type = FF_PIXEL_PLANAR,
168 [AV_PIX_FMT_YUVJ420P] = {
170 .color_type = FF_COLOR_YUV_JPEG,
171 .pixel_type = FF_PIXEL_PLANAR,
174 [AV_PIX_FMT_YUVJ422P] = {
176 .color_type = FF_COLOR_YUV_JPEG,
177 .pixel_type = FF_PIXEL_PLANAR,
180 [AV_PIX_FMT_YUVJ444P] = {
182 .color_type = FF_COLOR_YUV_JPEG,
183 .pixel_type = FF_PIXEL_PLANAR,
186 [AV_PIX_FMT_YUVJ440P] = {
188 .color_type = FF_COLOR_YUV_JPEG,
189 .pixel_type = FF_PIXEL_PLANAR,
194 [AV_PIX_FMT_RGB24] = {
196 .color_type = FF_COLOR_RGB,
197 .pixel_type = FF_PIXEL_PACKED,
200 [AV_PIX_FMT_BGR24] = {
202 .color_type = FF_COLOR_RGB,
203 .pixel_type = FF_PIXEL_PACKED,
206 [AV_PIX_FMT_ARGB] = {
207 .nb_channels = 4, .is_alpha = 1,
208 .color_type = FF_COLOR_RGB,
209 .pixel_type = FF_PIXEL_PACKED,
212 [AV_PIX_FMT_RGB48BE] = {
214 .color_type = FF_COLOR_RGB,
215 .pixel_type = FF_PIXEL_PACKED,
218 [AV_PIX_FMT_RGB48LE] = {
220 .color_type = FF_COLOR_RGB,
221 .pixel_type = FF_PIXEL_PACKED,
224 [AV_PIX_FMT_RGB565BE] = {
226 .color_type = FF_COLOR_RGB,
227 .pixel_type = FF_PIXEL_PACKED,
230 [AV_PIX_FMT_RGB565LE] = {
232 .color_type = FF_COLOR_RGB,
233 .pixel_type = FF_PIXEL_PACKED,
236 [AV_PIX_FMT_RGB555BE] = {
238 .color_type = FF_COLOR_RGB,
239 .pixel_type = FF_PIXEL_PACKED,
242 [AV_PIX_FMT_RGB555LE] = {
244 .color_type = FF_COLOR_RGB,
245 .pixel_type = FF_PIXEL_PACKED,
248 [AV_PIX_FMT_RGB444BE] = {
250 .color_type = FF_COLOR_RGB,
251 .pixel_type = FF_PIXEL_PACKED,
254 [AV_PIX_FMT_RGB444LE] = {
256 .color_type = FF_COLOR_RGB,
257 .pixel_type = FF_PIXEL_PACKED,
261 /* gray / mono formats */
262 [AV_PIX_FMT_GRAY16BE] = {
264 .color_type = FF_COLOR_GRAY,
265 .pixel_type = FF_PIXEL_PLANAR,
268 [AV_PIX_FMT_GRAY16LE] = {
270 .color_type = FF_COLOR_GRAY,
271 .pixel_type = FF_PIXEL_PLANAR,
274 [AV_PIX_FMT_GRAY8] = {
276 .color_type = FF_COLOR_GRAY,
277 .pixel_type = FF_PIXEL_PLANAR,
280 [AV_PIX_FMT_MONOWHITE] = {
282 .color_type = FF_COLOR_GRAY,
283 .pixel_type = FF_PIXEL_PLANAR,
286 [AV_PIX_FMT_MONOBLACK] = {
288 .color_type = FF_COLOR_GRAY,
289 .pixel_type = FF_PIXEL_PLANAR,
293 /* paletted formats */
294 [AV_PIX_FMT_PAL8] = {
295 .nb_channels = 4, .is_alpha = 1,
296 .color_type = FF_COLOR_RGB,
297 .pixel_type = FF_PIXEL_PALETTE,
300 [AV_PIX_FMT_UYYVYY411] = {
302 .color_type = FF_COLOR_YUV,
303 .pixel_type = FF_PIXEL_PACKED,
306 [AV_PIX_FMT_ABGR] = {
307 .nb_channels = 4, .is_alpha = 1,
308 .color_type = FF_COLOR_RGB,
309 .pixel_type = FF_PIXEL_PACKED,
312 [AV_PIX_FMT_BGR565BE] = {
314 .color_type = FF_COLOR_RGB,
315 .pixel_type = FF_PIXEL_PACKED,
318 [AV_PIX_FMT_BGR565LE] = {
320 .color_type = FF_COLOR_RGB,
321 .pixel_type = FF_PIXEL_PACKED,
324 [AV_PIX_FMT_BGR555BE] = {
326 .color_type = FF_COLOR_RGB,
327 .pixel_type = FF_PIXEL_PACKED,
330 [AV_PIX_FMT_BGR555LE] = {
332 .color_type = FF_COLOR_RGB,
333 .pixel_type = FF_PIXEL_PACKED,
336 [AV_PIX_FMT_BGR444BE] = {
338 .color_type = FF_COLOR_RGB,
339 .pixel_type = FF_PIXEL_PACKED,
342 [AV_PIX_FMT_BGR444LE] = {
344 .color_type = FF_COLOR_RGB,
345 .pixel_type = FF_PIXEL_PACKED,
348 [AV_PIX_FMT_RGB8] = {
350 .color_type = FF_COLOR_RGB,
351 .pixel_type = FF_PIXEL_PACKED,
354 [AV_PIX_FMT_RGB4] = {
356 .color_type = FF_COLOR_RGB,
357 .pixel_type = FF_PIXEL_PACKED,
360 [AV_PIX_FMT_RGB4_BYTE] = {
362 .color_type = FF_COLOR_RGB,
363 .pixel_type = FF_PIXEL_PACKED,
366 [AV_PIX_FMT_BGR8] = {
368 .color_type = FF_COLOR_RGB,
369 .pixel_type = FF_PIXEL_PACKED,
372 [AV_PIX_FMT_BGR4] = {
374 .color_type = FF_COLOR_RGB,
375 .pixel_type = FF_PIXEL_PACKED,
378 [AV_PIX_FMT_BGR4_BYTE] = {
380 .color_type = FF_COLOR_RGB,
381 .pixel_type = FF_PIXEL_PACKED,
384 [AV_PIX_FMT_NV12] = {
386 .color_type = FF_COLOR_YUV,
387 .pixel_type = FF_PIXEL_PLANAR,
390 [AV_PIX_FMT_NV21] = {
392 .color_type = FF_COLOR_YUV,
393 .pixel_type = FF_PIXEL_PLANAR,
397 [AV_PIX_FMT_BGRA] = {
398 .nb_channels = 4, .is_alpha = 1,
399 .color_type = FF_COLOR_RGB,
400 .pixel_type = FF_PIXEL_PACKED,
403 [AV_PIX_FMT_RGBA] = {
404 .nb_channels = 4, .is_alpha = 1,
405 .color_type = FF_COLOR_RGB,
406 .pixel_type = FF_PIXEL_PACKED,
411 void avcodec_get_chroma_sub_sample(enum AVPixelFormat pix_fmt, int *h_shift, int *v_shift)
413 const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(pix_fmt);
414 *h_shift = desc->log2_chroma_w;
415 *v_shift = desc->log2_chroma_h;
418 int ff_is_hwaccel_pix_fmt(enum AVPixelFormat pix_fmt)
420 const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(pix_fmt);
421 return desc->flags & PIX_FMT_HWACCEL;
424 int avpicture_fill(AVPicture *picture, uint8_t *ptr,
425 enum AVPixelFormat pix_fmt, int width, int height)
429 if ((ret = av_image_check_size(width, height, 0, NULL)) < 0)
432 if ((ret = av_image_fill_linesizes(picture->linesize, pix_fmt, width)) < 0)
435 return av_image_fill_pointers(picture->data, pix_fmt, height, ptr, picture->linesize);
438 int avpicture_layout(const AVPicture* src, enum AVPixelFormat pix_fmt, int width, int height,
439 unsigned char *dest, int dest_size)
441 int i, j, nb_planes = 0, linesizes[4];
442 const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(pix_fmt);
443 int size = avpicture_get_size(pix_fmt, width, height);
445 if (size > dest_size || size < 0)
446 return AVERROR(EINVAL);
448 for (i = 0; i < desc->nb_components; i++)
449 nb_planes = FFMAX(desc->comp[i].plane, nb_planes);
452 av_image_fill_linesizes(linesizes, pix_fmt, width);
453 for (i = 0; i < nb_planes; i++) {
454 int h, shift = (i == 1 || i == 2) ? desc->log2_chroma_h : 0;
455 const unsigned char *s = src->data[i];
456 h = (height + (1 << shift) - 1) >> shift;
458 for (j = 0; j < h; j++) {
459 memcpy(dest, s, linesizes[i]);
460 dest += linesizes[i];
461 s += src->linesize[i];
465 if (desc->flags & PIX_FMT_PAL)
466 memcpy((unsigned char *)(((size_t)dest + 3) & ~3), src->data[1], 256 * 4);
471 int avpicture_get_size(enum AVPixelFormat pix_fmt, int width, int height)
473 AVPicture dummy_pict;
474 const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(pix_fmt);
476 if(av_image_check_size(width, height, 0, NULL))
478 if (desc->flags & PIX_FMT_PSEUDOPAL)
479 // do not include palette for these pseudo-paletted formats
480 return width * height;
481 return avpicture_fill(&dummy_pict, NULL, pix_fmt, width, height);
484 int avcodec_get_pix_fmt_loss(enum AVPixelFormat dst_pix_fmt, enum AVPixelFormat src_pix_fmt,
487 const PixFmtInfo *pf, *ps;
488 const AVPixFmtDescriptor *src_desc = av_pix_fmt_desc_get(src_pix_fmt);
489 const AVPixFmtDescriptor *dst_desc = av_pix_fmt_desc_get(dst_pix_fmt);
492 ps = &pix_fmt_info[src_pix_fmt];
496 pf = &pix_fmt_info[dst_pix_fmt];
497 if (pf->depth < ps->depth ||
498 ((dst_pix_fmt == AV_PIX_FMT_RGB555BE || dst_pix_fmt == AV_PIX_FMT_RGB555LE ||
499 dst_pix_fmt == AV_PIX_FMT_BGR555BE || dst_pix_fmt == AV_PIX_FMT_BGR555LE) &&
500 (src_pix_fmt == AV_PIX_FMT_RGB565BE || src_pix_fmt == AV_PIX_FMT_RGB565LE ||
501 src_pix_fmt == AV_PIX_FMT_BGR565BE || src_pix_fmt == AV_PIX_FMT_BGR565LE)))
502 loss |= FF_LOSS_DEPTH;
503 if (dst_desc->log2_chroma_w > src_desc->log2_chroma_w ||
504 dst_desc->log2_chroma_h > src_desc->log2_chroma_h)
505 loss |= FF_LOSS_RESOLUTION;
506 switch(pf->color_type) {
508 if (ps->color_type != FF_COLOR_RGB &&
509 ps->color_type != FF_COLOR_GRAY)
510 loss |= FF_LOSS_COLORSPACE;
513 if (ps->color_type != FF_COLOR_GRAY)
514 loss |= FF_LOSS_COLORSPACE;
517 if (ps->color_type != FF_COLOR_YUV)
518 loss |= FF_LOSS_COLORSPACE;
520 case FF_COLOR_YUV_JPEG:
521 if (ps->color_type != FF_COLOR_YUV_JPEG &&
522 ps->color_type != FF_COLOR_YUV &&
523 ps->color_type != FF_COLOR_GRAY)
524 loss |= FF_LOSS_COLORSPACE;
528 if (ps->color_type != pf->color_type)
529 loss |= FF_LOSS_COLORSPACE;
532 if (pf->color_type == FF_COLOR_GRAY &&
533 ps->color_type != FF_COLOR_GRAY)
534 loss |= FF_LOSS_CHROMA;
535 if (!pf->is_alpha && (ps->is_alpha && has_alpha))
536 loss |= FF_LOSS_ALPHA;
537 if (pf->pixel_type == FF_PIXEL_PALETTE &&
538 (ps->pixel_type != FF_PIXEL_PALETTE && ps->color_type != FF_COLOR_GRAY))
539 loss |= FF_LOSS_COLORQUANT;
543 static int avg_bits_per_pixel(enum AVPixelFormat pix_fmt)
546 const PixFmtInfo *pf;
547 const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(pix_fmt);
549 pf = &pix_fmt_info[pix_fmt];
550 switch(pf->pixel_type) {
551 case FF_PIXEL_PACKED:
553 case AV_PIX_FMT_YUYV422:
554 case AV_PIX_FMT_UYVY422:
555 case AV_PIX_FMT_RGB565BE:
556 case AV_PIX_FMT_RGB565LE:
557 case AV_PIX_FMT_RGB555BE:
558 case AV_PIX_FMT_RGB555LE:
559 case AV_PIX_FMT_RGB444BE:
560 case AV_PIX_FMT_RGB444LE:
561 case AV_PIX_FMT_BGR565BE:
562 case AV_PIX_FMT_BGR565LE:
563 case AV_PIX_FMT_BGR555BE:
564 case AV_PIX_FMT_BGR555LE:
565 case AV_PIX_FMT_BGR444BE:
566 case AV_PIX_FMT_BGR444LE:
569 case AV_PIX_FMT_UYYVYY411:
573 bits = pf->depth * pf->nb_channels;
577 case FF_PIXEL_PLANAR:
578 if (desc->log2_chroma_w == 0 && desc->log2_chroma_h == 0) {
579 bits = pf->depth * pf->nb_channels;
581 bits = pf->depth + ((2 * pf->depth) >>
582 (desc->log2_chroma_w + desc->log2_chroma_h));
585 case FF_PIXEL_PALETTE:
595 static enum AVPixelFormat avcodec_find_best_pix_fmt1(enum AVPixelFormat *pix_fmt_list,
596 enum AVPixelFormat src_pix_fmt,
600 int dist, i, loss, min_dist;
601 enum AVPixelFormat dst_pix_fmt;
603 /* find exact color match with smallest size */
604 dst_pix_fmt = AV_PIX_FMT_NONE;
605 min_dist = 0x7fffffff;
607 while (pix_fmt_list[i] != AV_PIX_FMT_NONE) {
608 enum AVPixelFormat pix_fmt = pix_fmt_list[i];
610 if (i > AV_PIX_FMT_NB) {
611 av_log(NULL, AV_LOG_ERROR, "Pixel format list longer than expected, "
612 "it is either not properly terminated or contains duplicates\n");
613 return AV_PIX_FMT_NONE;
616 loss = avcodec_get_pix_fmt_loss(pix_fmt, src_pix_fmt, has_alpha) & loss_mask;
618 dist = avg_bits_per_pixel(pix_fmt);
619 if (dist < min_dist) {
621 dst_pix_fmt = pix_fmt;
629 #if FF_API_FIND_BEST_PIX_FMT
630 enum AVPixelFormat avcodec_find_best_pix_fmt(int64_t pix_fmt_mask, enum AVPixelFormat src_pix_fmt,
631 int has_alpha, int *loss_ptr)
633 enum AVPixelFormat list[64];
636 // test only the first 64 pixel formats to avoid undefined behaviour
637 for (i = 0; i < 64; i++) {
638 if (pix_fmt_mask & (1ULL << i))
641 list[j] = AV_PIX_FMT_NONE;
643 return avcodec_find_best_pix_fmt2(list, src_pix_fmt, has_alpha, loss_ptr);
645 #endif /* FF_API_FIND_BEST_PIX_FMT */
647 enum AVPixelFormat avcodec_find_best_pix_fmt2(enum AVPixelFormat *pix_fmt_list,
648 enum AVPixelFormat src_pix_fmt,
649 int has_alpha, int *loss_ptr)
651 enum AVPixelFormat dst_pix_fmt;
653 static const int loss_mask_order[] = {
654 ~0, /* no loss first */
657 ~(FF_LOSS_COLORSPACE | FF_LOSS_RESOLUTION),
663 /* try with successive loss */
666 loss_mask = loss_mask_order[i++];
667 dst_pix_fmt = avcodec_find_best_pix_fmt1(pix_fmt_list, src_pix_fmt,
668 has_alpha, loss_mask);
669 if (dst_pix_fmt >= 0)
674 return AV_PIX_FMT_NONE;
677 *loss_ptr = avcodec_get_pix_fmt_loss(dst_pix_fmt, src_pix_fmt, has_alpha);
681 void av_picture_copy(AVPicture *dst, const AVPicture *src,
682 enum AVPixelFormat pix_fmt, int width, int height)
684 av_image_copy(dst->data, dst->linesize, src->data,
685 src->linesize, pix_fmt, width, height);
689 void ff_shrink22(uint8_t *dst, int dst_wrap,
690 const uint8_t *src, int src_wrap,
691 int width, int height)
694 const uint8_t *s1, *s2;
697 for(;height > 0; height--) {
701 for(w = width;w >= 4; w-=4) {
702 d[0] = (s1[0] + s1[1] + s2[0] + s2[1] + 2) >> 2;
703 d[1] = (s1[2] + s1[3] + s2[2] + s2[3] + 2) >> 2;
704 d[2] = (s1[4] + s1[5] + s2[4] + s2[5] + 2) >> 2;
705 d[3] = (s1[6] + s1[7] + s2[6] + s2[7] + 2) >> 2;
711 d[0] = (s1[0] + s1[1] + s2[0] + s2[1] + 2) >> 2;
722 void ff_shrink44(uint8_t *dst, int dst_wrap,
723 const uint8_t *src, int src_wrap,
724 int width, int height)
727 const uint8_t *s1, *s2, *s3, *s4;
730 for(;height > 0; height--) {
736 for(w = width;w > 0; w--) {
737 d[0] = (s1[0] + s1[1] + s1[2] + s1[3] +
738 s2[0] + s2[1] + s2[2] + s2[3] +
739 s3[0] + s3[1] + s3[2] + s3[3] +
740 s4[0] + s4[1] + s4[2] + s4[3] + 8) >> 4;
753 void ff_shrink88(uint8_t *dst, int dst_wrap,
754 const uint8_t *src, int src_wrap,
755 int width, int height)
759 for(;height > 0; height--) {
760 for(w = width;w > 0; w--) {
763 tmp += src[0] + src[1] + src[2] + src[3] + src[4] + src[5] + src[6] + src[7];
766 *(dst++) = (tmp + 32)>>6;
767 src += 8 - 8*src_wrap;
769 src += 8*src_wrap - 8*width;
770 dst += dst_wrap - width;
775 int avpicture_alloc(AVPicture *picture,
776 enum AVPixelFormat pix_fmt, int width, int height)
780 if ((ret = av_image_alloc(picture->data, picture->linesize, width, height, pix_fmt, 1)) < 0) {
781 memset(picture, 0, sizeof(AVPicture));
788 void avpicture_free(AVPicture *picture)
790 av_free(picture->data[0]);
793 /* return true if yuv planar */
794 static inline int is_yuv_planar(const PixFmtInfo *ps)
796 return (ps->color_type == FF_COLOR_YUV ||
797 ps->color_type == FF_COLOR_YUV_JPEG) &&
798 ps->pixel_type == FF_PIXEL_PLANAR;
801 int av_picture_crop(AVPicture *dst, const AVPicture *src,
802 enum AVPixelFormat pix_fmt, int top_band, int left_band)
804 const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(pix_fmt);
808 if (pix_fmt < 0 || pix_fmt >= AV_PIX_FMT_NB || !is_yuv_planar(&pix_fmt_info[pix_fmt]))
811 y_shift = desc->log2_chroma_h;
812 x_shift = desc->log2_chroma_w;
814 dst->data[0] = src->data[0] + (top_band * src->linesize[0]) + left_band;
815 dst->data[1] = src->data[1] + ((top_band >> y_shift) * src->linesize[1]) + (left_band >> x_shift);
816 dst->data[2] = src->data[2] + ((top_band >> y_shift) * src->linesize[2]) + (left_band >> x_shift);
818 dst->linesize[0] = src->linesize[0];
819 dst->linesize[1] = src->linesize[1];
820 dst->linesize[2] = src->linesize[2];
824 int av_picture_pad(AVPicture *dst, const AVPicture *src, int height, int width,
825 enum AVPixelFormat pix_fmt, int padtop, int padbottom, int padleft, int padright,
828 const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(pix_fmt);
835 if (pix_fmt < 0 || pix_fmt >= AV_PIX_FMT_NB ||
836 !is_yuv_planar(&pix_fmt_info[pix_fmt])) return -1;
838 for (i = 0; i < 3; i++) {
839 x_shift = i ? desc->log2_chroma_w : 0;
840 y_shift = i ? desc->log2_chroma_h : 0;
842 if (padtop || padleft) {
843 memset(dst->data[i], color[i],
844 dst->linesize[i] * (padtop >> y_shift) + (padleft >> x_shift));
847 if (padleft || padright) {
848 optr = dst->data[i] + dst->linesize[i] * (padtop >> y_shift) +
849 (dst->linesize[i] - (padright >> x_shift));
850 yheight = (height - 1 - (padtop + padbottom)) >> y_shift;
851 for (y = 0; y < yheight; y++) {
852 memset(optr, color[i], (padleft + padright) >> x_shift);
853 optr += dst->linesize[i];
857 if (src) { /* first line */
858 uint8_t *iptr = src->data[i];
859 optr = dst->data[i] + dst->linesize[i] * (padtop >> y_shift) +
860 (padleft >> x_shift);
861 memcpy(optr, iptr, (width - padleft - padright) >> x_shift);
862 iptr += src->linesize[i];
863 optr = dst->data[i] + dst->linesize[i] * (padtop >> y_shift) +
864 (dst->linesize[i] - (padright >> x_shift));
865 yheight = (height - 1 - (padtop + padbottom)) >> y_shift;
866 for (y = 0; y < yheight; y++) {
867 memset(optr, color[i], (padleft + padright) >> x_shift);
868 memcpy(optr + ((padleft + padright) >> x_shift), iptr,
869 (width - padleft - padright) >> x_shift);
870 iptr += src->linesize[i];
871 optr += dst->linesize[i];
875 if (padbottom || padright) {
876 optr = dst->data[i] + dst->linesize[i] *
877 ((height - padbottom) >> y_shift) - (padright >> x_shift);
878 memset(optr, color[i],dst->linesize[i] *
879 (padbottom >> y_shift) + (padright >> x_shift));
885 #if !HAVE_MMX_EXTERNAL
886 /* filter parameters: [-1 4 2 4 -1] // 8 */
887 static void deinterlace_line_c(uint8_t *dst,
888 const uint8_t *lum_m4, const uint8_t *lum_m3,
889 const uint8_t *lum_m2, const uint8_t *lum_m1,
893 uint8_t *cm = ff_cropTbl + MAX_NEG_CROP;
896 for(;size > 0;size--) {
898 sum += lum_m3[0] << 2;
899 sum += lum_m2[0] << 1;
900 sum += lum_m1[0] << 2;
902 dst[0] = cm[(sum + 4) >> 3];
912 static void deinterlace_line_inplace_c(uint8_t *lum_m4, uint8_t *lum_m3,
913 uint8_t *lum_m2, uint8_t *lum_m1,
914 uint8_t *lum, int size)
916 uint8_t *cm = ff_cropTbl + MAX_NEG_CROP;
919 for(;size > 0;size--) {
921 sum += lum_m3[0] << 2;
922 sum += lum_m2[0] << 1;
924 sum += lum_m1[0] << 2;
926 lum_m2[0] = cm[(sum + 4) >> 3];
934 #endif /* !HAVE_MMX_EXTERNAL */
936 /* deinterlacing : 2 temporal taps, 3 spatial taps linear filter. The
937 top field is copied as is, but the bottom field is deinterlaced
938 against the top field. */
939 static void deinterlace_bottom_field(uint8_t *dst, int dst_wrap,
940 const uint8_t *src1, int src_wrap,
941 int width, int height)
943 const uint8_t *src_m2, *src_m1, *src_0, *src_p1, *src_p2;
948 src_0=&src_m1[src_wrap];
949 src_p1=&src_0[src_wrap];
950 src_p2=&src_p1[src_wrap];
951 for(y=0;y<(height-2);y+=2) {
952 memcpy(dst,src_m1,width);
954 deinterlace_line(dst,src_m2,src_m1,src_0,src_p1,src_p2,width);
958 src_p1 += 2*src_wrap;
959 src_p2 += 2*src_wrap;
962 memcpy(dst,src_m1,width);
965 deinterlace_line(dst,src_m2,src_m1,src_0,src_0,src_0,width);
968 static void deinterlace_bottom_field_inplace(uint8_t *src1, int src_wrap,
969 int width, int height)
971 uint8_t *src_m1, *src_0, *src_p1, *src_p2;
974 buf = av_malloc(width);
977 memcpy(buf,src_m1,width);
978 src_0=&src_m1[src_wrap];
979 src_p1=&src_0[src_wrap];
980 src_p2=&src_p1[src_wrap];
981 for(y=0;y<(height-2);y+=2) {
982 deinterlace_line_inplace(buf,src_m1,src_0,src_p1,src_p2,width);
985 src_p1 += 2*src_wrap;
986 src_p2 += 2*src_wrap;
989 deinterlace_line_inplace(buf,src_m1,src_0,src_0,src_0,width);
993 int avpicture_deinterlace(AVPicture *dst, const AVPicture *src,
994 enum AVPixelFormat pix_fmt, int width, int height)
998 if (pix_fmt != AV_PIX_FMT_YUV420P &&
999 pix_fmt != AV_PIX_FMT_YUVJ420P &&
1000 pix_fmt != AV_PIX_FMT_YUV422P &&
1001 pix_fmt != AV_PIX_FMT_YUVJ422P &&
1002 pix_fmt != AV_PIX_FMT_YUV444P &&
1003 pix_fmt != AV_PIX_FMT_YUV411P &&
1004 pix_fmt != AV_PIX_FMT_GRAY8)
1006 if ((width & 3) != 0 || (height & 3) != 0)
1012 case AV_PIX_FMT_YUVJ420P:
1013 case AV_PIX_FMT_YUV420P:
1017 case AV_PIX_FMT_YUV422P:
1018 case AV_PIX_FMT_YUVJ422P:
1021 case AV_PIX_FMT_YUV411P:
1027 if (pix_fmt == AV_PIX_FMT_GRAY8) {
1032 deinterlace_bottom_field_inplace(dst->data[i], dst->linesize[i],
1035 deinterlace_bottom_field(dst->data[i],dst->linesize[i],
1036 src->data[i], src->linesize[i],