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 xglue(x, y) x ## y
46 #define glue(x, y) xglue(x, y)
48 #define FF_COLOR_RGB 0 /**< RGB color space */
49 #define FF_COLOR_GRAY 1 /**< gray color space */
50 #define FF_COLOR_YUV 2 /**< YUV color space. 16 <= Y <= 235, 16 <= U, V <= 240 */
51 #define FF_COLOR_YUV_JPEG 3 /**< YUV color space. 0 <= Y <= 255, 0 <= U, V <= 255 */
53 #define FF_PIXEL_PLANAR 0 /**< each channel has one component in AVPicture */
54 #define FF_PIXEL_PACKED 1 /**< only one components containing all the channels */
55 #define FF_PIXEL_PALETTE 2 /**< one components containing indexes for a palette */
57 #if HAVE_MMX && HAVE_YASM
58 #define deinterlace_line_inplace ff_deinterlace_line_inplace_mmx
59 #define deinterlace_line ff_deinterlace_line_mmx
61 #define deinterlace_line_inplace deinterlace_line_inplace_c
62 #define deinterlace_line deinterlace_line_c
65 typedef struct PixFmtInfo {
66 uint8_t nb_channels; /**< number of channels (including alpha) */
67 uint8_t color_type; /**< color type (see FF_COLOR_xxx constants) */
68 uint8_t pixel_type; /**< pixel storage type (see FF_PIXEL_xxx constants) */
69 uint8_t is_alpha : 1; /**< true if alpha can be specified */
70 uint8_t depth; /**< bit depth of the color components */
73 /* this table gives more information about formats */
74 static const PixFmtInfo pix_fmt_info[PIX_FMT_NB] = {
78 .color_type = FF_COLOR_YUV,
79 .pixel_type = FF_PIXEL_PLANAR,
84 .color_type = FF_COLOR_YUV,
85 .pixel_type = FF_PIXEL_PLANAR,
90 .color_type = FF_COLOR_YUV,
91 .pixel_type = FF_PIXEL_PLANAR,
96 .color_type = FF_COLOR_YUV,
97 .pixel_type = FF_PIXEL_PACKED,
100 [PIX_FMT_UYVY422] = {
102 .color_type = FF_COLOR_YUV,
103 .pixel_type = FF_PIXEL_PACKED,
106 [PIX_FMT_YUV410P] = {
108 .color_type = FF_COLOR_YUV,
109 .pixel_type = FF_PIXEL_PLANAR,
112 [PIX_FMT_YUV411P] = {
114 .color_type = FF_COLOR_YUV,
115 .pixel_type = FF_PIXEL_PLANAR,
118 [PIX_FMT_YUV440P] = {
120 .color_type = FF_COLOR_YUV,
121 .pixel_type = FF_PIXEL_PLANAR,
124 [PIX_FMT_YUV420P16LE] = {
126 .color_type = FF_COLOR_YUV,
127 .pixel_type = FF_PIXEL_PLANAR,
130 [PIX_FMT_YUV422P16LE] = {
132 .color_type = FF_COLOR_YUV,
133 .pixel_type = FF_PIXEL_PLANAR,
136 [PIX_FMT_YUV444P16LE] = {
138 .color_type = FF_COLOR_YUV,
139 .pixel_type = FF_PIXEL_PLANAR,
142 [PIX_FMT_YUV420P16BE] = {
144 .color_type = FF_COLOR_YUV,
145 .pixel_type = FF_PIXEL_PLANAR,
148 [PIX_FMT_YUV422P16BE] = {
150 .color_type = FF_COLOR_YUV,
151 .pixel_type = FF_PIXEL_PLANAR,
154 [PIX_FMT_YUV444P16BE] = {
156 .color_type = FF_COLOR_YUV,
157 .pixel_type = FF_PIXEL_PLANAR,
162 /* YUV formats with alpha plane */
163 [PIX_FMT_YUVA420P] = {
165 .color_type = FF_COLOR_YUV,
166 .pixel_type = FF_PIXEL_PLANAR,
171 [PIX_FMT_YUVJ420P] = {
173 .color_type = FF_COLOR_YUV_JPEG,
174 .pixel_type = FF_PIXEL_PLANAR,
177 [PIX_FMT_YUVJ422P] = {
179 .color_type = FF_COLOR_YUV_JPEG,
180 .pixel_type = FF_PIXEL_PLANAR,
183 [PIX_FMT_YUVJ444P] = {
185 .color_type = FF_COLOR_YUV_JPEG,
186 .pixel_type = FF_PIXEL_PLANAR,
189 [PIX_FMT_YUVJ440P] = {
191 .color_type = FF_COLOR_YUV_JPEG,
192 .pixel_type = FF_PIXEL_PLANAR,
199 .color_type = FF_COLOR_RGB,
200 .pixel_type = FF_PIXEL_PACKED,
205 .color_type = FF_COLOR_RGB,
206 .pixel_type = FF_PIXEL_PACKED,
210 .nb_channels = 4, .is_alpha = 1,
211 .color_type = FF_COLOR_RGB,
212 .pixel_type = FF_PIXEL_PACKED,
215 [PIX_FMT_RGB48BE] = {
217 .color_type = FF_COLOR_RGB,
218 .pixel_type = FF_PIXEL_PACKED,
221 [PIX_FMT_RGB48LE] = {
223 .color_type = FF_COLOR_RGB,
224 .pixel_type = FF_PIXEL_PACKED,
227 [PIX_FMT_RGB565BE] = {
229 .color_type = FF_COLOR_RGB,
230 .pixel_type = FF_PIXEL_PACKED,
233 [PIX_FMT_RGB565LE] = {
235 .color_type = FF_COLOR_RGB,
236 .pixel_type = FF_PIXEL_PACKED,
239 [PIX_FMT_RGB555BE] = {
241 .color_type = FF_COLOR_RGB,
242 .pixel_type = FF_PIXEL_PACKED,
245 [PIX_FMT_RGB555LE] = {
247 .color_type = FF_COLOR_RGB,
248 .pixel_type = FF_PIXEL_PACKED,
251 [PIX_FMT_RGB444BE] = {
253 .color_type = FF_COLOR_RGB,
254 .pixel_type = FF_PIXEL_PACKED,
257 [PIX_FMT_RGB444LE] = {
259 .color_type = FF_COLOR_RGB,
260 .pixel_type = FF_PIXEL_PACKED,
264 /* gray / mono formats */
265 [PIX_FMT_GRAY16BE] = {
267 .color_type = FF_COLOR_GRAY,
268 .pixel_type = FF_PIXEL_PLANAR,
271 [PIX_FMT_GRAY16LE] = {
273 .color_type = FF_COLOR_GRAY,
274 .pixel_type = FF_PIXEL_PLANAR,
279 .color_type = FF_COLOR_GRAY,
280 .pixel_type = FF_PIXEL_PLANAR,
283 [PIX_FMT_MONOWHITE] = {
285 .color_type = FF_COLOR_GRAY,
286 .pixel_type = FF_PIXEL_PLANAR,
289 [PIX_FMT_MONOBLACK] = {
291 .color_type = FF_COLOR_GRAY,
292 .pixel_type = FF_PIXEL_PLANAR,
296 /* paletted formats */
298 .nb_channels = 4, .is_alpha = 1,
299 .color_type = FF_COLOR_RGB,
300 .pixel_type = FF_PIXEL_PALETTE,
303 [PIX_FMT_UYYVYY411] = {
305 .color_type = FF_COLOR_YUV,
306 .pixel_type = FF_PIXEL_PACKED,
310 .nb_channels = 4, .is_alpha = 1,
311 .color_type = FF_COLOR_RGB,
312 .pixel_type = FF_PIXEL_PACKED,
315 [PIX_FMT_BGR565BE] = {
317 .color_type = FF_COLOR_RGB,
318 .pixel_type = FF_PIXEL_PACKED,
321 [PIX_FMT_BGR565LE] = {
323 .color_type = FF_COLOR_RGB,
324 .pixel_type = FF_PIXEL_PACKED,
327 [PIX_FMT_BGR555BE] = {
329 .color_type = FF_COLOR_RGB,
330 .pixel_type = FF_PIXEL_PACKED,
333 [PIX_FMT_BGR555LE] = {
335 .color_type = FF_COLOR_RGB,
336 .pixel_type = FF_PIXEL_PACKED,
339 [PIX_FMT_BGR444BE] = {
341 .color_type = FF_COLOR_RGB,
342 .pixel_type = FF_PIXEL_PACKED,
345 [PIX_FMT_BGR444LE] = {
347 .color_type = FF_COLOR_RGB,
348 .pixel_type = FF_PIXEL_PACKED,
353 .color_type = FF_COLOR_RGB,
354 .pixel_type = FF_PIXEL_PACKED,
359 .color_type = FF_COLOR_RGB,
360 .pixel_type = FF_PIXEL_PACKED,
363 [PIX_FMT_RGB4_BYTE] = {
365 .color_type = FF_COLOR_RGB,
366 .pixel_type = FF_PIXEL_PACKED,
371 .color_type = FF_COLOR_RGB,
372 .pixel_type = FF_PIXEL_PACKED,
377 .color_type = FF_COLOR_RGB,
378 .pixel_type = FF_PIXEL_PACKED,
381 [PIX_FMT_BGR4_BYTE] = {
383 .color_type = FF_COLOR_RGB,
384 .pixel_type = FF_PIXEL_PACKED,
389 .color_type = FF_COLOR_YUV,
390 .pixel_type = FF_PIXEL_PLANAR,
395 .color_type = FF_COLOR_YUV,
396 .pixel_type = FF_PIXEL_PLANAR,
401 .nb_channels = 4, .is_alpha = 1,
402 .color_type = FF_COLOR_RGB,
403 .pixel_type = FF_PIXEL_PACKED,
407 .nb_channels = 4, .is_alpha = 1,
408 .color_type = FF_COLOR_RGB,
409 .pixel_type = FF_PIXEL_PACKED,
414 void avcodec_get_chroma_sub_sample(enum PixelFormat pix_fmt, int *h_shift, int *v_shift)
416 *h_shift = av_pix_fmt_descriptors[pix_fmt].log2_chroma_w;
417 *v_shift = av_pix_fmt_descriptors[pix_fmt].log2_chroma_h;
420 const char *avcodec_get_pix_fmt_name(enum PixelFormat pix_fmt)
422 if ((unsigned)pix_fmt >= PIX_FMT_NB)
425 return av_pix_fmt_descriptors[pix_fmt].name;
428 int ff_is_hwaccel_pix_fmt(enum PixelFormat pix_fmt)
430 return av_pix_fmt_descriptors[pix_fmt].flags & PIX_FMT_HWACCEL;
433 int avpicture_fill(AVPicture *picture, uint8_t *ptr,
434 enum PixelFormat pix_fmt, int width, int height)
438 if ((ret = av_image_check_size(width, height, 0, NULL)) < 0)
441 if ((ret = av_image_fill_linesizes(picture->linesize, pix_fmt, width)) < 0)
444 return av_image_fill_pointers(picture->data, pix_fmt, height, ptr, picture->linesize);
447 int avpicture_layout(const AVPicture* src, enum PixelFormat pix_fmt, int width, int height,
448 unsigned char *dest, int dest_size)
450 int i, j, nb_planes = 0, linesizes[4];
451 const AVPixFmtDescriptor *desc = &av_pix_fmt_descriptors[pix_fmt];
452 int size = avpicture_get_size(pix_fmt, width, height);
454 if (size > dest_size || size < 0)
455 return AVERROR(EINVAL);
457 for (i = 0; i < desc->nb_components; i++)
458 nb_planes = FFMAX(desc->comp[i].plane, nb_planes);
461 av_image_fill_linesizes(linesizes, pix_fmt, width);
462 for (i = 0; i < nb_planes; i++) {
463 int h, shift = (i == 1 || i == 2) ? desc->log2_chroma_h : 0;
464 const unsigned char *s = src->data[i];
465 h = (height + (1 << shift) - 1) >> shift;
467 for (j = 0; j < h; j++) {
468 memcpy(dest, s, linesizes[i]);
469 dest += linesizes[i];
470 s += src->linesize[i];
474 if (desc->flags & PIX_FMT_PAL)
475 memcpy((unsigned char *)(((size_t)dest + 3) & ~3), src->data[1], 256 * 4);
480 int avpicture_get_size(enum PixelFormat pix_fmt, int width, int height)
482 AVPicture dummy_pict;
483 if(av_image_check_size(width, height, 0, NULL))
488 case PIX_FMT_RGB4_BYTE:
489 case PIX_FMT_BGR4_BYTE:
491 // do not include palette for these pseudo-paletted formats
492 return width * height;
494 return avpicture_fill(&dummy_pict, NULL, pix_fmt, width, height);
497 int avcodec_get_pix_fmt_loss(enum PixelFormat dst_pix_fmt, enum PixelFormat src_pix_fmt,
500 const PixFmtInfo *pf, *ps;
501 const AVPixFmtDescriptor *src_desc = &av_pix_fmt_descriptors[src_pix_fmt];
502 const AVPixFmtDescriptor *dst_desc = &av_pix_fmt_descriptors[dst_pix_fmt];
505 ps = &pix_fmt_info[src_pix_fmt];
509 pf = &pix_fmt_info[dst_pix_fmt];
510 if (pf->depth < ps->depth ||
511 ((dst_pix_fmt == PIX_FMT_RGB555BE || dst_pix_fmt == PIX_FMT_RGB555LE ||
512 dst_pix_fmt == PIX_FMT_BGR555BE || dst_pix_fmt == PIX_FMT_BGR555LE) &&
513 (src_pix_fmt == PIX_FMT_RGB565BE || src_pix_fmt == PIX_FMT_RGB565LE ||
514 src_pix_fmt == PIX_FMT_BGR565BE || src_pix_fmt == PIX_FMT_BGR565LE)))
515 loss |= FF_LOSS_DEPTH;
516 if (dst_desc->log2_chroma_w > src_desc->log2_chroma_w ||
517 dst_desc->log2_chroma_h > src_desc->log2_chroma_h)
518 loss |= FF_LOSS_RESOLUTION;
519 switch(pf->color_type) {
521 if (ps->color_type != FF_COLOR_RGB &&
522 ps->color_type != FF_COLOR_GRAY)
523 loss |= FF_LOSS_COLORSPACE;
526 if (ps->color_type != FF_COLOR_GRAY)
527 loss |= FF_LOSS_COLORSPACE;
530 if (ps->color_type != FF_COLOR_YUV)
531 loss |= FF_LOSS_COLORSPACE;
533 case FF_COLOR_YUV_JPEG:
534 if (ps->color_type != FF_COLOR_YUV_JPEG &&
535 ps->color_type != FF_COLOR_YUV &&
536 ps->color_type != FF_COLOR_GRAY)
537 loss |= FF_LOSS_COLORSPACE;
541 if (ps->color_type != pf->color_type)
542 loss |= FF_LOSS_COLORSPACE;
545 if (pf->color_type == FF_COLOR_GRAY &&
546 ps->color_type != FF_COLOR_GRAY)
547 loss |= FF_LOSS_CHROMA;
548 if (!pf->is_alpha && (ps->is_alpha && has_alpha))
549 loss |= FF_LOSS_ALPHA;
550 if (pf->pixel_type == FF_PIXEL_PALETTE &&
551 (ps->pixel_type != FF_PIXEL_PALETTE && ps->color_type != FF_COLOR_GRAY))
552 loss |= FF_LOSS_COLORQUANT;
556 static int avg_bits_per_pixel(enum PixelFormat pix_fmt)
559 const PixFmtInfo *pf;
560 const AVPixFmtDescriptor *desc = &av_pix_fmt_descriptors[pix_fmt];
562 pf = &pix_fmt_info[pix_fmt];
563 switch(pf->pixel_type) {
564 case FF_PIXEL_PACKED:
566 case PIX_FMT_YUYV422:
567 case PIX_FMT_UYVY422:
568 case PIX_FMT_RGB565BE:
569 case PIX_FMT_RGB565LE:
570 case PIX_FMT_RGB555BE:
571 case PIX_FMT_RGB555LE:
572 case PIX_FMT_RGB444BE:
573 case PIX_FMT_RGB444LE:
574 case PIX_FMT_BGR565BE:
575 case PIX_FMT_BGR565LE:
576 case PIX_FMT_BGR555BE:
577 case PIX_FMT_BGR555LE:
578 case PIX_FMT_BGR444BE:
579 case PIX_FMT_BGR444LE:
582 case PIX_FMT_UYYVYY411:
586 bits = pf->depth * pf->nb_channels;
590 case FF_PIXEL_PLANAR:
591 if (desc->log2_chroma_w == 0 && desc->log2_chroma_h == 0) {
592 bits = pf->depth * pf->nb_channels;
594 bits = pf->depth + ((2 * pf->depth) >>
595 (desc->log2_chroma_w + desc->log2_chroma_h));
598 case FF_PIXEL_PALETTE:
608 static enum PixelFormat avcodec_find_best_pix_fmt1(int64_t pix_fmt_mask,
609 enum PixelFormat src_pix_fmt,
613 int dist, i, loss, min_dist;
614 enum PixelFormat dst_pix_fmt;
616 /* find exact color match with smallest size */
617 dst_pix_fmt = PIX_FMT_NONE;
618 min_dist = 0x7fffffff;
619 for(i = 0;i < PIX_FMT_NB; i++) {
620 if (pix_fmt_mask & (1ULL << i)) {
621 loss = avcodec_get_pix_fmt_loss(i, src_pix_fmt, has_alpha) & loss_mask;
623 dist = avg_bits_per_pixel(i);
624 if (dist < min_dist) {
634 enum PixelFormat avcodec_find_best_pix_fmt(int64_t pix_fmt_mask, enum PixelFormat src_pix_fmt,
635 int has_alpha, int *loss_ptr)
637 enum PixelFormat dst_pix_fmt;
639 static const int loss_mask_order[] = {
640 ~0, /* no loss first */
643 ~(FF_LOSS_COLORSPACE | FF_LOSS_RESOLUTION),
649 /* try with successive loss */
652 loss_mask = loss_mask_order[i++];
653 dst_pix_fmt = avcodec_find_best_pix_fmt1(pix_fmt_mask, src_pix_fmt,
654 has_alpha, loss_mask);
655 if (dst_pix_fmt >= 0)
663 *loss_ptr = avcodec_get_pix_fmt_loss(dst_pix_fmt, src_pix_fmt, has_alpha);
667 void av_picture_copy(AVPicture *dst, const AVPicture *src,
668 enum PixelFormat pix_fmt, int width, int height)
670 av_image_copy(dst->data, dst->linesize, src->data,
671 src->linesize, pix_fmt, width, height);
675 void ff_shrink22(uint8_t *dst, int dst_wrap,
676 const uint8_t *src, int src_wrap,
677 int width, int height)
680 const uint8_t *s1, *s2;
683 for(;height > 0; height--) {
687 for(w = width;w >= 4; w-=4) {
688 d[0] = (s1[0] + s1[1] + s2[0] + s2[1] + 2) >> 2;
689 d[1] = (s1[2] + s1[3] + s2[2] + s2[3] + 2) >> 2;
690 d[2] = (s1[4] + s1[5] + s2[4] + s2[5] + 2) >> 2;
691 d[3] = (s1[6] + s1[7] + s2[6] + s2[7] + 2) >> 2;
697 d[0] = (s1[0] + s1[1] + s2[0] + s2[1] + 2) >> 2;
708 void ff_shrink44(uint8_t *dst, int dst_wrap,
709 const uint8_t *src, int src_wrap,
710 int width, int height)
713 const uint8_t *s1, *s2, *s3, *s4;
716 for(;height > 0; height--) {
722 for(w = width;w > 0; w--) {
723 d[0] = (s1[0] + s1[1] + s1[2] + s1[3] +
724 s2[0] + s2[1] + s2[2] + s2[3] +
725 s3[0] + s3[1] + s3[2] + s3[3] +
726 s4[0] + s4[1] + s4[2] + s4[3] + 8) >> 4;
739 void ff_shrink88(uint8_t *dst, int dst_wrap,
740 const uint8_t *src, int src_wrap,
741 int width, int height)
745 for(;height > 0; height--) {
746 for(w = width;w > 0; w--) {
749 tmp += src[0] + src[1] + src[2] + src[3] + src[4] + src[5] + src[6] + src[7];
752 *(dst++) = (tmp + 32)>>6;
753 src += 8 - 8*src_wrap;
755 src += 8*src_wrap - 8*width;
756 dst += dst_wrap - width;
761 int avpicture_alloc(AVPicture *picture,
762 enum PixelFormat pix_fmt, int width, int height)
766 if ((ret = av_image_alloc(picture->data, picture->linesize, width, height, pix_fmt, 1)) < 0) {
767 memset(picture, 0, sizeof(AVPicture));
774 void avpicture_free(AVPicture *picture)
776 av_free(picture->data[0]);
779 /* return true if yuv planar */
780 static inline int is_yuv_planar(const PixFmtInfo *ps)
782 return (ps->color_type == FF_COLOR_YUV ||
783 ps->color_type == FF_COLOR_YUV_JPEG) &&
784 ps->pixel_type == FF_PIXEL_PLANAR;
787 int av_picture_crop(AVPicture *dst, const AVPicture *src,
788 enum PixelFormat pix_fmt, int top_band, int left_band)
793 if (pix_fmt < 0 || pix_fmt >= PIX_FMT_NB || !is_yuv_planar(&pix_fmt_info[pix_fmt]))
796 y_shift = av_pix_fmt_descriptors[pix_fmt].log2_chroma_h;
797 x_shift = av_pix_fmt_descriptors[pix_fmt].log2_chroma_w;
799 dst->data[0] = src->data[0] + (top_band * src->linesize[0]) + left_band;
800 dst->data[1] = src->data[1] + ((top_band >> y_shift) * src->linesize[1]) + (left_band >> x_shift);
801 dst->data[2] = src->data[2] + ((top_band >> y_shift) * src->linesize[2]) + (left_band >> x_shift);
803 dst->linesize[0] = src->linesize[0];
804 dst->linesize[1] = src->linesize[1];
805 dst->linesize[2] = src->linesize[2];
809 int av_picture_pad(AVPicture *dst, const AVPicture *src, int height, int width,
810 enum PixelFormat pix_fmt, int padtop, int padbottom, int padleft, int padright,
819 if (pix_fmt < 0 || pix_fmt >= PIX_FMT_NB ||
820 !is_yuv_planar(&pix_fmt_info[pix_fmt])) return -1;
822 for (i = 0; i < 3; i++) {
823 x_shift = i ? av_pix_fmt_descriptors[pix_fmt].log2_chroma_w : 0;
824 y_shift = i ? av_pix_fmt_descriptors[pix_fmt].log2_chroma_h : 0;
826 if (padtop || padleft) {
827 memset(dst->data[i], color[i],
828 dst->linesize[i] * (padtop >> y_shift) + (padleft >> x_shift));
831 if (padleft || padright) {
832 optr = dst->data[i] + dst->linesize[i] * (padtop >> y_shift) +
833 (dst->linesize[i] - (padright >> x_shift));
834 yheight = (height - 1 - (padtop + padbottom)) >> y_shift;
835 for (y = 0; y < yheight; y++) {
836 memset(optr, color[i], (padleft + padright) >> x_shift);
837 optr += dst->linesize[i];
841 if (src) { /* first line */
842 uint8_t *iptr = src->data[i];
843 optr = dst->data[i] + dst->linesize[i] * (padtop >> y_shift) +
844 (padleft >> x_shift);
845 memcpy(optr, iptr, (width - padleft - padright) >> x_shift);
846 iptr += src->linesize[i];
847 optr = dst->data[i] + dst->linesize[i] * (padtop >> y_shift) +
848 (dst->linesize[i] - (padright >> x_shift));
849 yheight = (height - 1 - (padtop + padbottom)) >> y_shift;
850 for (y = 0; y < yheight; y++) {
851 memset(optr, color[i], (padleft + padright) >> x_shift);
852 memcpy(optr + ((padleft + padright) >> x_shift), iptr,
853 (width - padleft - padright) >> x_shift);
854 iptr += src->linesize[i];
855 optr += dst->linesize[i];
859 if (padbottom || padright) {
860 optr = dst->data[i] + dst->linesize[i] *
861 ((height - padbottom) >> y_shift) - (padright >> x_shift);
862 memset(optr, color[i],dst->linesize[i] *
863 (padbottom >> y_shift) + (padright >> x_shift));
869 /* NOTE: we scan all the pixels to have an exact information */
870 static int get_alpha_info_pal8(const AVPicture *src, int width, int height)
872 const unsigned char *p;
873 int src_wrap, ret, x, y;
875 uint32_t *palette = (uint32_t *)src->data[1];
878 src_wrap = src->linesize[0] - width;
880 for(y=0;y<height;y++) {
881 for(x=0;x<width;x++) {
882 a = palette[p[0]] >> 24;
884 ret |= FF_ALPHA_TRANSP;
885 } else if (a != 0xff) {
886 ret |= FF_ALPHA_SEMI_TRANSP;
895 int img_get_alpha_info(const AVPicture *src,
896 enum PixelFormat pix_fmt, int width, int height)
898 const PixFmtInfo *pf = &pix_fmt_info[pix_fmt];
901 /* no alpha can be represented in format */
906 ret = get_alpha_info_pal8(src, width, height);
909 /* we do not know, so everything is indicated */
910 ret = FF_ALPHA_TRANSP | FF_ALPHA_SEMI_TRANSP;
916 #if !(HAVE_MMX && HAVE_YASM)
917 /* filter parameters: [-1 4 2 4 -1] // 8 */
918 static void deinterlace_line_c(uint8_t *dst,
919 const uint8_t *lum_m4, const uint8_t *lum_m3,
920 const uint8_t *lum_m2, const uint8_t *lum_m1,
924 uint8_t *cm = ff_cropTbl + MAX_NEG_CROP;
927 for(;size > 0;size--) {
929 sum += lum_m3[0] << 2;
930 sum += lum_m2[0] << 1;
931 sum += lum_m1[0] << 2;
933 dst[0] = cm[(sum + 4) >> 3];
943 static void deinterlace_line_inplace_c(uint8_t *lum_m4, uint8_t *lum_m3,
944 uint8_t *lum_m2, uint8_t *lum_m1,
945 uint8_t *lum, int size)
947 uint8_t *cm = ff_cropTbl + MAX_NEG_CROP;
950 for(;size > 0;size--) {
952 sum += lum_m3[0] << 2;
953 sum += lum_m2[0] << 1;
955 sum += lum_m1[0] << 2;
957 lum_m2[0] = cm[(sum + 4) >> 3];
967 /* deinterlacing : 2 temporal taps, 3 spatial taps linear filter. The
968 top field is copied as is, but the bottom field is deinterlaced
969 against the top field. */
970 static void deinterlace_bottom_field(uint8_t *dst, int dst_wrap,
971 const uint8_t *src1, int src_wrap,
972 int width, int height)
974 const uint8_t *src_m2, *src_m1, *src_0, *src_p1, *src_p2;
979 src_0=&src_m1[src_wrap];
980 src_p1=&src_0[src_wrap];
981 src_p2=&src_p1[src_wrap];
982 for(y=0;y<(height-2);y+=2) {
983 memcpy(dst,src_m1,width);
985 deinterlace_line(dst,src_m2,src_m1,src_0,src_p1,src_p2,width);
989 src_p1 += 2*src_wrap;
990 src_p2 += 2*src_wrap;
993 memcpy(dst,src_m1,width);
996 deinterlace_line(dst,src_m2,src_m1,src_0,src_0,src_0,width);
999 static void deinterlace_bottom_field_inplace(uint8_t *src1, int src_wrap,
1000 int width, int height)
1002 uint8_t *src_m1, *src_0, *src_p1, *src_p2;
1005 buf = (uint8_t*)av_malloc(width);
1008 memcpy(buf,src_m1,width);
1009 src_0=&src_m1[src_wrap];
1010 src_p1=&src_0[src_wrap];
1011 src_p2=&src_p1[src_wrap];
1012 for(y=0;y<(height-2);y+=2) {
1013 deinterlace_line_inplace(buf,src_m1,src_0,src_p1,src_p2,width);
1016 src_p1 += 2*src_wrap;
1017 src_p2 += 2*src_wrap;
1020 deinterlace_line_inplace(buf,src_m1,src_0,src_0,src_0,width);
1024 int avpicture_deinterlace(AVPicture *dst, const AVPicture *src,
1025 enum PixelFormat pix_fmt, int width, int height)
1029 if (pix_fmt != PIX_FMT_YUV420P &&
1030 pix_fmt != PIX_FMT_YUVJ420P &&
1031 pix_fmt != PIX_FMT_YUV422P &&
1032 pix_fmt != PIX_FMT_YUVJ422P &&
1033 pix_fmt != PIX_FMT_YUV444P &&
1034 pix_fmt != PIX_FMT_YUV411P &&
1035 pix_fmt != PIX_FMT_GRAY8)
1037 if ((width & 3) != 0 || (height & 3) != 0)
1043 case PIX_FMT_YUVJ420P:
1044 case PIX_FMT_YUV420P:
1048 case PIX_FMT_YUV422P:
1049 case PIX_FMT_YUVJ422P:
1052 case PIX_FMT_YUV411P:
1058 if (pix_fmt == PIX_FMT_GRAY8) {
1063 deinterlace_bottom_field_inplace(dst->data[i], dst->linesize[i],
1066 deinterlace_bottom_field(dst->data[i],dst->linesize[i],
1067 src->data[i], src->linesize[i],