2 * Misc image conversion routines
3 * Copyright (c) 2001, 2002, 2003 Fabrice Bellard
5 * This file is part of FFmpeg.
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.
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.
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
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 "imgconvert.h"
37 #include "libavutil/colorspace.h"
38 #include "libavutil/pixdesc.h"
39 #include "libavutil/imgutils.h"
41 #if HAVE_MMX && HAVE_YASM
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 #if HAVE_MMX && HAVE_YASM
51 #define deinterlace_line_inplace ff_deinterlace_line_inplace_mmx
52 #define deinterlace_line ff_deinterlace_line_mmx
54 #define deinterlace_line_inplace deinterlace_line_inplace_c
55 #define deinterlace_line deinterlace_line_c
58 typedef struct PixFmtInfo {
59 uint8_t color_type; /**< color type (see FF_COLOR_xxx constants) */
60 uint8_t is_alpha : 1; /**< true if alpha can be specified */
61 uint8_t padded_size; /**< padded size in bits if different from the non-padded size */
64 /* this table gives more information about formats */
65 static const PixFmtInfo pix_fmt_info[PIX_FMT_NB] = {
68 .color_type = FF_COLOR_YUV,
71 .color_type = FF_COLOR_YUV,
74 .color_type = FF_COLOR_YUV,
77 .color_type = FF_COLOR_YUV,
80 .color_type = FF_COLOR_YUV,
83 .color_type = FF_COLOR_YUV,
86 .color_type = FF_COLOR_YUV,
89 .color_type = FF_COLOR_YUV,
91 [PIX_FMT_YUV420P16LE] = {
92 .color_type = FF_COLOR_YUV,
94 [PIX_FMT_YUV422P16LE] = {
95 .color_type = FF_COLOR_YUV,
97 [PIX_FMT_YUV444P16LE] = {
98 .color_type = FF_COLOR_YUV,
100 [PIX_FMT_YUV420P16BE] = {
101 .color_type = FF_COLOR_YUV,
103 [PIX_FMT_YUV422P16BE] = {
104 .color_type = FF_COLOR_YUV,
106 [PIX_FMT_YUV444P16BE] = {
107 .color_type = FF_COLOR_YUV,
110 /* YUV formats with alpha plane */
111 [PIX_FMT_YUVA420P] = {
112 .color_type = FF_COLOR_YUV,
116 [PIX_FMT_YUVJ420P] = {
117 .color_type = FF_COLOR_YUV_JPEG,
119 [PIX_FMT_YUVJ422P] = {
120 .color_type = FF_COLOR_YUV_JPEG,
122 [PIX_FMT_YUVJ444P] = {
123 .color_type = FF_COLOR_YUV_JPEG,
125 [PIX_FMT_YUVJ440P] = {
126 .color_type = FF_COLOR_YUV_JPEG,
131 .color_type = FF_COLOR_RGB,
134 .color_type = FF_COLOR_RGB,
138 .color_type = FF_COLOR_RGB,
140 [PIX_FMT_RGB48BE] = {
141 .color_type = FF_COLOR_RGB,
143 [PIX_FMT_RGB48LE] = {
144 .color_type = FF_COLOR_RGB,
146 [PIX_FMT_RGBA64BE] = {
148 .color_type = FF_COLOR_RGB,
150 [PIX_FMT_RGBA64LE] = {
152 .color_type = FF_COLOR_RGB,
154 [PIX_FMT_RGB565BE] = {
155 .color_type = FF_COLOR_RGB,
157 [PIX_FMT_RGB565LE] = {
158 .color_type = FF_COLOR_RGB,
160 [PIX_FMT_RGB555BE] = {
161 .color_type = FF_COLOR_RGB,
164 [PIX_FMT_RGB555LE] = {
165 .color_type = FF_COLOR_RGB,
168 [PIX_FMT_RGB444BE] = {
169 .color_type = FF_COLOR_RGB,
172 [PIX_FMT_RGB444LE] = {
173 .color_type = FF_COLOR_RGB,
177 /* gray / mono formats */
178 [PIX_FMT_GRAY16BE] = {
179 .color_type = FF_COLOR_GRAY,
181 [PIX_FMT_GRAY16LE] = {
182 .color_type = FF_COLOR_GRAY,
185 .color_type = FF_COLOR_GRAY,
187 [PIX_FMT_MONOWHITE] = {
188 .color_type = FF_COLOR_GRAY,
190 [PIX_FMT_MONOBLACK] = {
191 .color_type = FF_COLOR_GRAY,
194 /* paletted formats */
197 .color_type = FF_COLOR_RGB,
199 [PIX_FMT_UYYVYY411] = {
200 .color_type = FF_COLOR_YUV,
204 .color_type = FF_COLOR_RGB,
206 [PIX_FMT_BGR48BE] = {
207 .color_type = FF_COLOR_RGB,
209 [PIX_FMT_BGR48LE] = {
210 .color_type = FF_COLOR_RGB,
212 [PIX_FMT_BGRA64BE] = {
214 .color_type = FF_COLOR_RGB,
216 [PIX_FMT_BGRA64LE] = {
218 .color_type = FF_COLOR_RGB,
220 [PIX_FMT_BGR565BE] = {
221 .color_type = FF_COLOR_RGB,
224 [PIX_FMT_BGR565LE] = {
225 .color_type = FF_COLOR_RGB,
228 [PIX_FMT_BGR555BE] = {
229 .color_type = FF_COLOR_RGB,
232 [PIX_FMT_BGR555LE] = {
233 .color_type = FF_COLOR_RGB,
236 [PIX_FMT_BGR444BE] = {
237 .color_type = FF_COLOR_RGB,
240 [PIX_FMT_BGR444LE] = {
241 .color_type = FF_COLOR_RGB,
245 .color_type = FF_COLOR_RGB,
248 .color_type = FF_COLOR_RGB,
250 [PIX_FMT_RGB4_BYTE] = {
251 .color_type = FF_COLOR_RGB,
255 .color_type = FF_COLOR_RGB,
258 .color_type = FF_COLOR_RGB,
260 [PIX_FMT_BGR4_BYTE] = {
261 .color_type = FF_COLOR_RGB,
265 .color_type = FF_COLOR_YUV,
268 .color_type = FF_COLOR_YUV,
273 .color_type = FF_COLOR_RGB,
277 .color_type = FF_COLOR_RGB,
281 void avcodec_get_chroma_sub_sample(enum PixelFormat pix_fmt, int *h_shift, int *v_shift)
283 *h_shift = av_pix_fmt_descriptors[pix_fmt].log2_chroma_w;
284 *v_shift = av_pix_fmt_descriptors[pix_fmt].log2_chroma_h;
287 #if FF_API_GET_PIX_FMT_NAME
288 const char *avcodec_get_pix_fmt_name(enum PixelFormat pix_fmt)
290 return av_get_pix_fmt_name(pix_fmt);
294 int ff_is_hwaccel_pix_fmt(enum PixelFormat pix_fmt)
296 return av_pix_fmt_descriptors[pix_fmt].flags & PIX_FMT_HWACCEL;
299 int avpicture_fill(AVPicture *picture, uint8_t *ptr,
300 enum PixelFormat pix_fmt, int width, int height)
304 if ((ret = av_image_check_size(width, height, 0, NULL)) < 0)
307 if ((ret = av_image_fill_linesizes(picture->linesize, pix_fmt, width)) < 0)
310 return av_image_fill_pointers(picture->data, pix_fmt, height, ptr, picture->linesize);
313 int avpicture_layout(const AVPicture* src, enum PixelFormat pix_fmt, int width, int height,
314 unsigned char *dest, int dest_size)
316 int i, j, nb_planes = 0, linesizes[4];
317 const AVPixFmtDescriptor *desc = &av_pix_fmt_descriptors[pix_fmt];
318 int size = avpicture_get_size(pix_fmt, width, height);
320 if (size > dest_size || size < 0)
321 return AVERROR(EINVAL);
323 for (i = 0; i < desc->nb_components; i++)
324 nb_planes = FFMAX(desc->comp[i].plane, nb_planes);
327 av_image_fill_linesizes(linesizes, pix_fmt, width);
328 for (i = 0; i < nb_planes; i++) {
329 int h, shift = (i == 1 || i == 2) ? desc->log2_chroma_h : 0;
330 const unsigned char *s = src->data[i];
331 h = (height + (1 << shift) - 1) >> shift;
333 for (j = 0; j < h; j++) {
334 memcpy(dest, s, linesizes[i]);
335 dest += linesizes[i];
336 s += src->linesize[i];
343 case PIX_FMT_RGB4_BYTE:
344 case PIX_FMT_BGR4_BYTE:
346 // do not include palette for these pseudo-paletted formats
350 if (desc->flags & PIX_FMT_PAL)
351 memcpy((unsigned char *)(((size_t)dest + 3) & ~3), src->data[1], 256 * 4);
356 int avpicture_get_size(enum PixelFormat pix_fmt, int width, int height)
358 AVPicture dummy_pict;
359 if(av_image_check_size(width, height, 0, NULL))
364 case PIX_FMT_RGB4_BYTE:
365 case PIX_FMT_BGR4_BYTE:
367 // do not include palette for these pseudo-paletted formats
368 return width * height;
370 return avpicture_fill(&dummy_pict, NULL, pix_fmt, width, height);
373 static int get_pix_fmt_depth(int *min, int *max, enum PixelFormat pix_fmt)
375 const AVPixFmtDescriptor *desc = &av_pix_fmt_descriptors[pix_fmt];
378 if (!desc->nb_components) {
380 return AVERROR(EINVAL);
383 *min = INT_MAX, *max = -INT_MAX;
384 for (i = 0; i < desc->nb_components; i++) {
385 *min = FFMIN(desc->comp[i].depth_minus1+1, *min);
386 *max = FFMAX(desc->comp[i].depth_minus1+1, *max);
391 int avcodec_get_pix_fmt_loss(enum PixelFormat dst_pix_fmt, enum PixelFormat src_pix_fmt,
394 const PixFmtInfo *pf, *ps;
395 const AVPixFmtDescriptor *src_desc;
396 const AVPixFmtDescriptor *dst_desc;
397 int src_min_depth, src_max_depth, dst_min_depth, dst_max_depth;
400 if (dst_pix_fmt >= PIX_FMT_NB || dst_pix_fmt <= PIX_FMT_NONE)
403 src_desc = &av_pix_fmt_descriptors[src_pix_fmt];
404 dst_desc = &av_pix_fmt_descriptors[dst_pix_fmt];
405 ps = &pix_fmt_info[src_pix_fmt];
410 if ((ret = get_pix_fmt_depth(&src_min_depth, &src_max_depth, src_pix_fmt)) < 0)
412 if ((ret = get_pix_fmt_depth(&dst_min_depth, &dst_max_depth, dst_pix_fmt)) < 0)
414 if (dst_min_depth < src_min_depth ||
415 dst_max_depth < src_max_depth)
416 loss |= FF_LOSS_DEPTH;
417 if (dst_desc->log2_chroma_w > src_desc->log2_chroma_w ||
418 dst_desc->log2_chroma_h > src_desc->log2_chroma_h)
419 loss |= FF_LOSS_RESOLUTION;
421 pf = &pix_fmt_info[dst_pix_fmt];
422 switch(pf->color_type) {
424 if (ps->color_type != FF_COLOR_RGB &&
425 ps->color_type != FF_COLOR_GRAY)
426 loss |= FF_LOSS_COLORSPACE;
429 if (ps->color_type != FF_COLOR_GRAY)
430 loss |= FF_LOSS_COLORSPACE;
433 if (ps->color_type != FF_COLOR_YUV)
434 loss |= FF_LOSS_COLORSPACE;
436 case FF_COLOR_YUV_JPEG:
437 if (ps->color_type != FF_COLOR_YUV_JPEG &&
438 ps->color_type != FF_COLOR_YUV &&
439 ps->color_type != FF_COLOR_GRAY)
440 loss |= FF_LOSS_COLORSPACE;
444 if (ps->color_type != pf->color_type)
445 loss |= FF_LOSS_COLORSPACE;
448 if (pf->color_type == FF_COLOR_GRAY &&
449 ps->color_type != FF_COLOR_GRAY)
450 loss |= FF_LOSS_CHROMA;
451 if (!pf->is_alpha && (ps->is_alpha && has_alpha))
452 loss |= FF_LOSS_ALPHA;
453 if (dst_pix_fmt == PIX_FMT_PAL8 &&
454 (src_pix_fmt != PIX_FMT_PAL8 && ps->color_type != FF_COLOR_GRAY))
455 loss |= FF_LOSS_COLORQUANT;
459 static int avg_bits_per_pixel(enum PixelFormat pix_fmt)
461 const PixFmtInfo *info = &pix_fmt_info[pix_fmt];
462 const AVPixFmtDescriptor *desc = &av_pix_fmt_descriptors[pix_fmt];
464 return info->padded_size ?
465 info->padded_size : av_get_bits_per_pixel(desc);
468 enum PixelFormat avcodec_find_best_pix_fmt(int64_t pix_fmt_mask, enum PixelFormat src_pix_fmt,
469 int has_alpha, int *loss_ptr)
471 enum PixelFormat dst_pix_fmt;
474 if (loss_ptr) /* all losses count (for backward compatibility) */
477 dst_pix_fmt = PIX_FMT_NONE; /* so first iteration doesn't have to be treated special */
478 for(i = 0; i< FFMIN(PIX_FMT_NB, 64); i++){
479 if (pix_fmt_mask & (1ULL << i))
480 dst_pix_fmt = avcodec_find_best_pix_fmt2(dst_pix_fmt, i, src_pix_fmt, has_alpha, loss_ptr);
485 enum PixelFormat avcodec_find_best_pix_fmt2(enum PixelFormat dst_pix_fmt1, enum PixelFormat dst_pix_fmt2,
486 enum PixelFormat src_pix_fmt, int has_alpha, int *loss_ptr)
488 enum PixelFormat dst_pix_fmt;
489 int loss1, loss2, loss_order1, loss_order2, i, loss_mask;
490 static const int loss_mask_order[] = {
491 ~0, /* no loss first */
494 ~(FF_LOSS_COLORSPACE | FF_LOSS_RESOLUTION),
497 ~(FF_LOSS_RESOLUTION | FF_LOSS_DEPTH | FF_LOSS_COLORSPACE | FF_LOSS_ALPHA |
498 FF_LOSS_COLORQUANT | FF_LOSS_CHROMA),
499 0x80000, //non zero entry that combines all loss variants including future additions
503 loss_mask= loss_ptr?~*loss_ptr:~0; /* use loss mask if provided */
504 dst_pix_fmt = PIX_FMT_NONE;
505 loss1 = avcodec_get_pix_fmt_loss(dst_pix_fmt1, src_pix_fmt, has_alpha) & loss_mask;
506 loss2 = avcodec_get_pix_fmt_loss(dst_pix_fmt2, src_pix_fmt, has_alpha) & loss_mask;
508 /* try with successive loss */
509 for(i = 0;loss_mask_order[i] != 0 && dst_pix_fmt == PIX_FMT_NONE;i++) {
510 loss_order1 = loss1 & loss_mask_order[i];
511 loss_order2 = loss2 & loss_mask_order[i];
513 if (loss_order1 == 0 && loss_order2 == 0){ /* use format with smallest depth */
514 dst_pix_fmt = avg_bits_per_pixel(dst_pix_fmt2) < avg_bits_per_pixel(dst_pix_fmt1) ? dst_pix_fmt2 : dst_pix_fmt1;
515 } else if (loss_order1 == 0 || loss_order2 == 0) { /* use format with no loss */
516 dst_pix_fmt = loss_order2 ? dst_pix_fmt1 : dst_pix_fmt2;
521 *loss_ptr = avcodec_get_pix_fmt_loss(dst_pix_fmt, src_pix_fmt, has_alpha);
525 void av_picture_copy(AVPicture *dst, const AVPicture *src,
526 enum PixelFormat pix_fmt, int width, int height)
528 av_image_copy(dst->data, dst->linesize, src->data,
529 src->linesize, pix_fmt, width, height);
533 void ff_shrink22(uint8_t *dst, int dst_wrap,
534 const uint8_t *src, int src_wrap,
535 int width, int height)
538 const uint8_t *s1, *s2;
541 for(;height > 0; height--) {
545 for(w = width;w >= 4; w-=4) {
546 d[0] = (s1[0] + s1[1] + s2[0] + s2[1] + 2) >> 2;
547 d[1] = (s1[2] + s1[3] + s2[2] + s2[3] + 2) >> 2;
548 d[2] = (s1[4] + s1[5] + s2[4] + s2[5] + 2) >> 2;
549 d[3] = (s1[6] + s1[7] + s2[6] + s2[7] + 2) >> 2;
555 d[0] = (s1[0] + s1[1] + s2[0] + s2[1] + 2) >> 2;
566 void ff_shrink44(uint8_t *dst, int dst_wrap,
567 const uint8_t *src, int src_wrap,
568 int width, int height)
571 const uint8_t *s1, *s2, *s3, *s4;
574 for(;height > 0; height--) {
580 for(w = width;w > 0; w--) {
581 d[0] = (s1[0] + s1[1] + s1[2] + s1[3] +
582 s2[0] + s2[1] + s2[2] + s2[3] +
583 s3[0] + s3[1] + s3[2] + s3[3] +
584 s4[0] + s4[1] + s4[2] + s4[3] + 8) >> 4;
597 void ff_shrink88(uint8_t *dst, int dst_wrap,
598 const uint8_t *src, int src_wrap,
599 int width, int height)
603 for(;height > 0; height--) {
604 for(w = width;w > 0; w--) {
607 tmp += src[0] + src[1] + src[2] + src[3] + src[4] + src[5] + src[6] + src[7];
610 *(dst++) = (tmp + 32)>>6;
611 src += 8 - 8*src_wrap;
613 src += 8*src_wrap - 8*width;
614 dst += dst_wrap - width;
619 int avpicture_alloc(AVPicture *picture,
620 enum PixelFormat pix_fmt, int width, int height)
624 if ((ret = av_image_alloc(picture->data, picture->linesize, width, height, pix_fmt, 1)) < 0) {
625 memset(picture, 0, sizeof(AVPicture));
632 void avpicture_free(AVPicture *picture)
634 av_free(picture->data[0]);
637 /* return true if yuv planar */
638 static inline int is_yuv_planar(enum PixelFormat fmt)
640 const PixFmtInfo *info = &pix_fmt_info[fmt];
641 const AVPixFmtDescriptor *desc = &av_pix_fmt_descriptors[fmt];
643 int planes[4] = { 0 };
645 if (info->color_type != FF_COLOR_YUV &&
646 info->color_type != FF_COLOR_YUV_JPEG)
649 /* set the used planes */
650 for (i = 0; i < desc->nb_components; i++)
651 planes[desc->comp[i].plane] = 1;
653 /* if there is an unused plane, the format is not planar */
654 for (i = 0; i < desc->nb_components; i++)
660 int av_picture_crop(AVPicture *dst, const AVPicture *src,
661 enum PixelFormat pix_fmt, int top_band, int left_band)
666 if (pix_fmt < 0 || pix_fmt >= PIX_FMT_NB)
669 y_shift = av_pix_fmt_descriptors[pix_fmt].log2_chroma_h;
670 x_shift = av_pix_fmt_descriptors[pix_fmt].log2_chroma_w;
672 if (is_yuv_planar(pix_fmt)) {
673 dst->data[0] = src->data[0] + (top_band * src->linesize[0]) + left_band;
674 dst->data[1] = src->data[1] + ((top_band >> y_shift) * src->linesize[1]) + (left_band >> x_shift);
675 dst->data[2] = src->data[2] + ((top_band >> y_shift) * src->linesize[2]) + (left_band >> x_shift);
677 if(top_band % (1<<y_shift) || left_band % (1<<x_shift))
679 if(left_band) //FIXME add support for this too
681 dst->data[0] = src->data[0] + (top_band * src->linesize[0]) + left_band;
684 dst->linesize[0] = src->linesize[0];
685 dst->linesize[1] = src->linesize[1];
686 dst->linesize[2] = src->linesize[2];
690 int av_picture_pad(AVPicture *dst, const AVPicture *src, int height, int width,
691 enum PixelFormat pix_fmt, int padtop, int padbottom, int padleft, int padright,
700 if (pix_fmt < 0 || pix_fmt >= PIX_FMT_NB ||
701 !is_yuv_planar(pix_fmt)) return -1;
703 for (i = 0; i < 3; i++) {
704 x_shift = i ? av_pix_fmt_descriptors[pix_fmt].log2_chroma_w : 0;
705 y_shift = i ? av_pix_fmt_descriptors[pix_fmt].log2_chroma_h : 0;
707 if (padtop || padleft) {
708 memset(dst->data[i], color[i],
709 dst->linesize[i] * (padtop >> y_shift) + (padleft >> x_shift));
712 if (padleft || padright) {
713 optr = dst->data[i] + dst->linesize[i] * (padtop >> y_shift) +
714 (dst->linesize[i] - (padright >> x_shift));
715 yheight = (height - 1 - (padtop + padbottom)) >> y_shift;
716 for (y = 0; y < yheight; y++) {
717 memset(optr, color[i], (padleft + padright) >> x_shift);
718 optr += dst->linesize[i];
722 if (src) { /* first line */
723 uint8_t *iptr = src->data[i];
724 optr = dst->data[i] + dst->linesize[i] * (padtop >> y_shift) +
725 (padleft >> x_shift);
726 memcpy(optr, iptr, (width - padleft - padright) >> x_shift);
727 iptr += src->linesize[i];
728 optr = dst->data[i] + dst->linesize[i] * (padtop >> y_shift) +
729 (dst->linesize[i] - (padright >> x_shift));
730 yheight = (height - 1 - (padtop + padbottom)) >> y_shift;
731 for (y = 0; y < yheight; y++) {
732 memset(optr, color[i], (padleft + padright) >> x_shift);
733 memcpy(optr + ((padleft + padright) >> x_shift), iptr,
734 (width - padleft - padright) >> x_shift);
735 iptr += src->linesize[i];
736 optr += dst->linesize[i];
740 if (padbottom || padright) {
741 optr = dst->data[i] + dst->linesize[i] *
742 ((height - padbottom) >> y_shift) - (padright >> x_shift);
743 memset(optr, color[i],dst->linesize[i] *
744 (padbottom >> y_shift) + (padright >> x_shift));
750 #if FF_API_GET_ALPHA_INFO
751 /* NOTE: we scan all the pixels to have an exact information */
752 static int get_alpha_info_pal8(const AVPicture *src, int width, int height)
754 const unsigned char *p;
755 int src_wrap, ret, x, y;
757 uint32_t *palette = (uint32_t *)src->data[1];
760 src_wrap = src->linesize[0] - width;
762 for(y=0;y<height;y++) {
763 for(x=0;x<width;x++) {
764 a = palette[p[0]] >> 24;
766 ret |= FF_ALPHA_TRANSP;
767 } else if (a != 0xff) {
768 ret |= FF_ALPHA_SEMI_TRANSP;
777 int img_get_alpha_info(const AVPicture *src,
778 enum PixelFormat pix_fmt, int width, int height)
780 const PixFmtInfo *pf = &pix_fmt_info[pix_fmt];
783 /* no alpha can be represented in format */
788 ret = get_alpha_info_pal8(src, width, height);
791 /* we do not know, so everything is indicated */
792 ret = FF_ALPHA_TRANSP | FF_ALPHA_SEMI_TRANSP;
799 #if !(HAVE_MMX && HAVE_YASM)
800 /* filter parameters: [-1 4 2 4 -1] // 8 */
801 static void deinterlace_line_c(uint8_t *dst,
802 const uint8_t *lum_m4, const uint8_t *lum_m3,
803 const uint8_t *lum_m2, const uint8_t *lum_m1,
807 uint8_t *cm = ff_cropTbl + MAX_NEG_CROP;
810 for(;size > 0;size--) {
812 sum += lum_m3[0] << 2;
813 sum += lum_m2[0] << 1;
814 sum += lum_m1[0] << 2;
816 dst[0] = cm[(sum + 4) >> 3];
826 static void deinterlace_line_inplace_c(uint8_t *lum_m4, uint8_t *lum_m3,
827 uint8_t *lum_m2, uint8_t *lum_m1,
828 uint8_t *lum, int size)
830 uint8_t *cm = ff_cropTbl + MAX_NEG_CROP;
833 for(;size > 0;size--) {
835 sum += lum_m3[0] << 2;
836 sum += lum_m2[0] << 1;
838 sum += lum_m1[0] << 2;
840 lum_m2[0] = cm[(sum + 4) >> 3];
850 /* deinterlacing : 2 temporal taps, 3 spatial taps linear filter. The
851 top field is copied as is, but the bottom field is deinterlaced
852 against the top field. */
853 static void deinterlace_bottom_field(uint8_t *dst, int dst_wrap,
854 const uint8_t *src1, int src_wrap,
855 int width, int height)
857 const uint8_t *src_m2, *src_m1, *src_0, *src_p1, *src_p2;
862 src_0=&src_m1[src_wrap];
863 src_p1=&src_0[src_wrap];
864 src_p2=&src_p1[src_wrap];
865 for(y=0;y<(height-2);y+=2) {
866 memcpy(dst,src_m1,width);
868 deinterlace_line(dst,src_m2,src_m1,src_0,src_p1,src_p2,width);
872 src_p1 += 2*src_wrap;
873 src_p2 += 2*src_wrap;
876 memcpy(dst,src_m1,width);
879 deinterlace_line(dst,src_m2,src_m1,src_0,src_0,src_0,width);
882 static void deinterlace_bottom_field_inplace(uint8_t *src1, int src_wrap,
883 int width, int height)
885 uint8_t *src_m1, *src_0, *src_p1, *src_p2;
888 buf = av_malloc(width);
891 memcpy(buf,src_m1,width);
892 src_0=&src_m1[src_wrap];
893 src_p1=&src_0[src_wrap];
894 src_p2=&src_p1[src_wrap];
895 for(y=0;y<(height-2);y+=2) {
896 deinterlace_line_inplace(buf,src_m1,src_0,src_p1,src_p2,width);
899 src_p1 += 2*src_wrap;
900 src_p2 += 2*src_wrap;
903 deinterlace_line_inplace(buf,src_m1,src_0,src_0,src_0,width);
907 int avpicture_deinterlace(AVPicture *dst, const AVPicture *src,
908 enum PixelFormat pix_fmt, int width, int height)
912 if (pix_fmt != PIX_FMT_YUV420P &&
913 pix_fmt != PIX_FMT_YUVJ420P &&
914 pix_fmt != PIX_FMT_YUV422P &&
915 pix_fmt != PIX_FMT_YUVJ422P &&
916 pix_fmt != PIX_FMT_YUV444P &&
917 pix_fmt != PIX_FMT_YUV411P &&
918 pix_fmt != PIX_FMT_GRAY8)
920 if ((width & 3) != 0 || (height & 3) != 0)
926 case PIX_FMT_YUVJ420P:
927 case PIX_FMT_YUV420P:
931 case PIX_FMT_YUV422P:
932 case PIX_FMT_YUVJ422P:
935 case PIX_FMT_YUV411P:
941 if (pix_fmt == PIX_FMT_GRAY8) {
946 deinterlace_bottom_field_inplace(dst->data[i], dst->linesize[i],
949 deinterlace_bottom_field(dst->data[i],dst->linesize[i],
950 src->data[i], src->linesize[i],