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 "libavcore/imgutils.h"
40 #include "libavcore/internal.h"
42 #if HAVE_MMX && HAVE_YASM
43 #include "x86/dsputil_mmx.h"
46 #define xglue(x, y) x ## y
47 #define glue(x, y) xglue(x, y)
49 #define FF_COLOR_RGB 0 /**< RGB color space */
50 #define FF_COLOR_GRAY 1 /**< gray color space */
51 #define FF_COLOR_YUV 2 /**< YUV color space. 16 <= Y <= 235, 16 <= U, V <= 240 */
52 #define FF_COLOR_YUV_JPEG 3 /**< YUV color space. 0 <= Y <= 255, 0 <= U, V <= 255 */
54 #define FF_PIXEL_PLANAR 0 /**< each channel has one component in AVPicture */
55 #define FF_PIXEL_PACKED 1 /**< only one components containing all the channels */
56 #define FF_PIXEL_PALETTE 2 /**< one components containing indexes for a palette */
58 #if HAVE_MMX && HAVE_YASM
59 #define deinterlace_line_inplace ff_deinterlace_line_inplace_mmx
60 #define deinterlace_line ff_deinterlace_line_mmx
62 #define deinterlace_line_inplace deinterlace_line_inplace_c
63 #define deinterlace_line deinterlace_line_c
66 typedef struct PixFmtInfo {
67 uint8_t nb_channels; /**< number of channels (including alpha) */
68 uint8_t color_type; /**< color type (see FF_COLOR_xxx constants) */
69 uint8_t pixel_type; /**< pixel storage type (see FF_PIXEL_xxx constants) */
70 uint8_t is_alpha : 1; /**< true if alpha can be specified */
71 uint8_t depth; /**< bit depth of the color components */
74 /* this table gives more information about formats */
75 static const PixFmtInfo pix_fmt_info[PIX_FMT_NB] = {
79 .color_type = FF_COLOR_YUV,
80 .pixel_type = FF_PIXEL_PLANAR,
85 .color_type = FF_COLOR_YUV,
86 .pixel_type = FF_PIXEL_PLANAR,
91 .color_type = FF_COLOR_YUV,
92 .pixel_type = FF_PIXEL_PLANAR,
97 .color_type = FF_COLOR_YUV,
98 .pixel_type = FF_PIXEL_PACKED,
101 [PIX_FMT_UYVY422] = {
103 .color_type = FF_COLOR_YUV,
104 .pixel_type = FF_PIXEL_PACKED,
107 [PIX_FMT_YUV410P] = {
109 .color_type = FF_COLOR_YUV,
110 .pixel_type = FF_PIXEL_PLANAR,
113 [PIX_FMT_YUV411P] = {
115 .color_type = FF_COLOR_YUV,
116 .pixel_type = FF_PIXEL_PLANAR,
119 [PIX_FMT_YUV440P] = {
121 .color_type = FF_COLOR_YUV,
122 .pixel_type = FF_PIXEL_PLANAR,
125 [PIX_FMT_YUV420P16LE] = {
127 .color_type = FF_COLOR_YUV,
128 .pixel_type = FF_PIXEL_PLANAR,
131 [PIX_FMT_YUV422P16LE] = {
133 .color_type = FF_COLOR_YUV,
134 .pixel_type = FF_PIXEL_PLANAR,
137 [PIX_FMT_YUV444P16LE] = {
139 .color_type = FF_COLOR_YUV,
140 .pixel_type = FF_PIXEL_PLANAR,
143 [PIX_FMT_YUV420P16BE] = {
145 .color_type = FF_COLOR_YUV,
146 .pixel_type = FF_PIXEL_PLANAR,
149 [PIX_FMT_YUV422P16BE] = {
151 .color_type = FF_COLOR_YUV,
152 .pixel_type = FF_PIXEL_PLANAR,
155 [PIX_FMT_YUV444P16BE] = {
157 .color_type = FF_COLOR_YUV,
158 .pixel_type = FF_PIXEL_PLANAR,
163 /* YUV formats with alpha plane */
164 [PIX_FMT_YUVA420P] = {
166 .color_type = FF_COLOR_YUV,
167 .pixel_type = FF_PIXEL_PLANAR,
172 [PIX_FMT_YUVJ420P] = {
174 .color_type = FF_COLOR_YUV_JPEG,
175 .pixel_type = FF_PIXEL_PLANAR,
178 [PIX_FMT_YUVJ422P] = {
180 .color_type = FF_COLOR_YUV_JPEG,
181 .pixel_type = FF_PIXEL_PLANAR,
184 [PIX_FMT_YUVJ444P] = {
186 .color_type = FF_COLOR_YUV_JPEG,
187 .pixel_type = FF_PIXEL_PLANAR,
190 [PIX_FMT_YUVJ440P] = {
192 .color_type = FF_COLOR_YUV_JPEG,
193 .pixel_type = FF_PIXEL_PLANAR,
200 .color_type = FF_COLOR_RGB,
201 .pixel_type = FF_PIXEL_PACKED,
206 .color_type = FF_COLOR_RGB,
207 .pixel_type = FF_PIXEL_PACKED,
211 .nb_channels = 4, .is_alpha = 1,
212 .color_type = FF_COLOR_RGB,
213 .pixel_type = FF_PIXEL_PACKED,
216 [PIX_FMT_RGB48BE] = {
218 .color_type = FF_COLOR_RGB,
219 .pixel_type = FF_PIXEL_PACKED,
222 [PIX_FMT_RGB48LE] = {
224 .color_type = FF_COLOR_RGB,
225 .pixel_type = FF_PIXEL_PACKED,
228 [PIX_FMT_RGB565BE] = {
230 .color_type = FF_COLOR_RGB,
231 .pixel_type = FF_PIXEL_PACKED,
234 [PIX_FMT_RGB565LE] = {
236 .color_type = FF_COLOR_RGB,
237 .pixel_type = FF_PIXEL_PACKED,
240 [PIX_FMT_RGB555BE] = {
242 .color_type = FF_COLOR_RGB,
243 .pixel_type = FF_PIXEL_PACKED,
246 [PIX_FMT_RGB555LE] = {
248 .color_type = FF_COLOR_RGB,
249 .pixel_type = FF_PIXEL_PACKED,
252 [PIX_FMT_RGB444BE] = {
254 .color_type = FF_COLOR_RGB,
255 .pixel_type = FF_PIXEL_PACKED,
258 [PIX_FMT_RGB444LE] = {
260 .color_type = FF_COLOR_RGB,
261 .pixel_type = FF_PIXEL_PACKED,
265 /* gray / mono formats */
266 [PIX_FMT_GRAY16BE] = {
268 .color_type = FF_COLOR_GRAY,
269 .pixel_type = FF_PIXEL_PLANAR,
272 [PIX_FMT_GRAY16LE] = {
274 .color_type = FF_COLOR_GRAY,
275 .pixel_type = FF_PIXEL_PLANAR,
280 .color_type = FF_COLOR_GRAY,
281 .pixel_type = FF_PIXEL_PLANAR,
284 [PIX_FMT_MONOWHITE] = {
286 .color_type = FF_COLOR_GRAY,
287 .pixel_type = FF_PIXEL_PLANAR,
290 [PIX_FMT_MONOBLACK] = {
292 .color_type = FF_COLOR_GRAY,
293 .pixel_type = FF_PIXEL_PLANAR,
297 /* paletted formats */
299 .nb_channels = 4, .is_alpha = 1,
300 .color_type = FF_COLOR_RGB,
301 .pixel_type = FF_PIXEL_PALETTE,
304 [PIX_FMT_UYYVYY411] = {
306 .color_type = FF_COLOR_YUV,
307 .pixel_type = FF_PIXEL_PACKED,
311 .nb_channels = 4, .is_alpha = 1,
312 .color_type = FF_COLOR_RGB,
313 .pixel_type = FF_PIXEL_PACKED,
316 [PIX_FMT_BGR565BE] = {
318 .color_type = FF_COLOR_RGB,
319 .pixel_type = FF_PIXEL_PACKED,
322 [PIX_FMT_BGR565LE] = {
324 .color_type = FF_COLOR_RGB,
325 .pixel_type = FF_PIXEL_PACKED,
328 [PIX_FMT_BGR555BE] = {
330 .color_type = FF_COLOR_RGB,
331 .pixel_type = FF_PIXEL_PACKED,
334 [PIX_FMT_BGR555LE] = {
336 .color_type = FF_COLOR_RGB,
337 .pixel_type = FF_PIXEL_PACKED,
340 [PIX_FMT_BGR444BE] = {
342 .color_type = FF_COLOR_RGB,
343 .pixel_type = FF_PIXEL_PACKED,
346 [PIX_FMT_BGR444LE] = {
348 .color_type = FF_COLOR_RGB,
349 .pixel_type = FF_PIXEL_PACKED,
354 .color_type = FF_COLOR_RGB,
355 .pixel_type = FF_PIXEL_PACKED,
360 .color_type = FF_COLOR_RGB,
361 .pixel_type = FF_PIXEL_PACKED,
364 [PIX_FMT_RGB4_BYTE] = {
366 .color_type = FF_COLOR_RGB,
367 .pixel_type = FF_PIXEL_PACKED,
372 .color_type = FF_COLOR_RGB,
373 .pixel_type = FF_PIXEL_PACKED,
378 .color_type = FF_COLOR_RGB,
379 .pixel_type = FF_PIXEL_PACKED,
382 [PIX_FMT_BGR4_BYTE] = {
384 .color_type = FF_COLOR_RGB,
385 .pixel_type = FF_PIXEL_PACKED,
390 .color_type = FF_COLOR_YUV,
391 .pixel_type = FF_PIXEL_PLANAR,
396 .color_type = FF_COLOR_YUV,
397 .pixel_type = FF_PIXEL_PLANAR,
402 .nb_channels = 4, .is_alpha = 1,
403 .color_type = FF_COLOR_RGB,
404 .pixel_type = FF_PIXEL_PACKED,
408 .nb_channels = 4, .is_alpha = 1,
409 .color_type = FF_COLOR_RGB,
410 .pixel_type = FF_PIXEL_PACKED,
415 void avcodec_get_chroma_sub_sample(enum PixelFormat pix_fmt, int *h_shift, int *v_shift)
417 *h_shift = av_pix_fmt_descriptors[pix_fmt].log2_chroma_w;
418 *v_shift = av_pix_fmt_descriptors[pix_fmt].log2_chroma_h;
421 const char *avcodec_get_pix_fmt_name(enum PixelFormat pix_fmt)
423 if ((unsigned)pix_fmt >= PIX_FMT_NB)
426 return av_pix_fmt_descriptors[pix_fmt].name;
429 #if LIBAVCODEC_VERSION_MAJOR < 53
430 enum PixelFormat avcodec_get_pix_fmt(const char *name)
432 return av_get_pix_fmt(name);
436 void avcodec_pix_fmt_string (char *buf, int buf_size, enum PixelFormat pix_fmt)
440 snprintf (buf, buf_size,
441 "name " " nb_channels" " depth"
444 PixFmtInfo info= pix_fmt_info[pix_fmt];
446 snprintf (buf, buf_size,
448 av_pix_fmt_descriptors[pix_fmt].name,
450 av_get_bits_per_pixel(&av_pix_fmt_descriptors[pix_fmt])
455 int ff_is_hwaccel_pix_fmt(enum PixelFormat pix_fmt)
457 return av_pix_fmt_descriptors[pix_fmt].flags & PIX_FMT_HWACCEL;
460 #if LIBAVCODEC_VERSION_MAJOR < 53
461 int ff_set_systematic_pal(uint32_t pal[256], enum PixelFormat pix_fmt){
462 return ff_set_systematic_pal2(pal, pix_fmt);
465 int ff_fill_linesize(AVPicture *picture, enum PixelFormat pix_fmt, int width)
467 return av_image_fill_linesizes(picture->linesize, pix_fmt, width);
470 int ff_fill_pointer(AVPicture *picture, uint8_t *ptr, enum PixelFormat pix_fmt,
473 return av_image_fill_pointers(picture->data, pix_fmt, height, ptr, picture->linesize);
477 int avpicture_fill(AVPicture *picture, uint8_t *ptr,
478 enum PixelFormat pix_fmt, int width, int height)
482 if ((ret = av_image_check_size(width, height, 0, NULL)) < 0)
485 if ((ret = av_image_fill_linesizes(picture->linesize, pix_fmt, width)) < 0)
488 return av_image_fill_pointers(picture->data, pix_fmt, height, ptr, picture->linesize);
491 int avpicture_layout(const AVPicture* src, enum PixelFormat pix_fmt, int width, int height,
492 unsigned char *dest, int dest_size)
494 const PixFmtInfo* pf = &pix_fmt_info[pix_fmt];
495 const AVPixFmtDescriptor *desc = &av_pix_fmt_descriptors[pix_fmt];
496 int i, j, w, ow, h, oh, data_planes;
497 const unsigned char* s;
498 int size = avpicture_get_size(pix_fmt, width, height);
500 if (size > dest_size || size < 0)
503 if (pf->pixel_type == FF_PIXEL_PACKED || pf->pixel_type == FF_PIXEL_PALETTE) {
504 if (pix_fmt == PIX_FMT_YUYV422 ||
505 pix_fmt == PIX_FMT_UYVY422 ||
506 pix_fmt == PIX_FMT_BGR565BE ||
507 pix_fmt == PIX_FMT_BGR565LE ||
508 pix_fmt == PIX_FMT_BGR555BE ||
509 pix_fmt == PIX_FMT_BGR555LE ||
510 pix_fmt == PIX_FMT_BGR444BE ||
511 pix_fmt == PIX_FMT_BGR444LE ||
512 pix_fmt == PIX_FMT_RGB565BE ||
513 pix_fmt == PIX_FMT_RGB565LE ||
514 pix_fmt == PIX_FMT_RGB555BE ||
515 pix_fmt == PIX_FMT_RGB555LE ||
516 pix_fmt == PIX_FMT_RGB444BE ||
517 pix_fmt == PIX_FMT_RGB444LE)
519 else if (pix_fmt == PIX_FMT_UYYVYY411)
521 else if (pix_fmt == PIX_FMT_PAL8)
524 w = width * (pf->depth * pf->nb_channels / 8);
529 data_planes = pf->nb_channels;
530 w = (width*pf->depth + 7)/8;
537 for (i=0; i<data_planes; i++) {
539 w = (- ((-width) >> desc->log2_chroma_w) * pf->depth + 7) / 8;
540 h = -((-height) >> desc->log2_chroma_h);
541 if (pix_fmt == PIX_FMT_NV12 || pix_fmt == PIX_FMT_NV21)
551 s += src->linesize[i];
555 if (pf->pixel_type == FF_PIXEL_PALETTE)
556 memcpy((unsigned char *)(((size_t)dest + 3) & ~3), src->data[1], 256 * 4);
561 int avpicture_get_size(enum PixelFormat pix_fmt, int width, int height)
563 AVPicture dummy_pict;
564 if(av_image_check_size(width, height, 0, NULL))
569 case PIX_FMT_RGB4_BYTE:
570 case PIX_FMT_BGR4_BYTE:
572 // do not include palette for these pseudo-paletted formats
573 return width * height;
575 return avpicture_fill(&dummy_pict, NULL, pix_fmt, width, height);
578 int avcodec_get_pix_fmt_loss(enum PixelFormat dst_pix_fmt, enum PixelFormat src_pix_fmt,
581 const PixFmtInfo *pf, *ps;
582 const AVPixFmtDescriptor *src_desc = &av_pix_fmt_descriptors[src_pix_fmt];
583 const AVPixFmtDescriptor *dst_desc = &av_pix_fmt_descriptors[dst_pix_fmt];
586 ps = &pix_fmt_info[src_pix_fmt];
590 pf = &pix_fmt_info[dst_pix_fmt];
591 if (pf->depth < ps->depth ||
592 ((dst_pix_fmt == PIX_FMT_RGB555BE || dst_pix_fmt == PIX_FMT_RGB555LE ||
593 dst_pix_fmt == PIX_FMT_BGR555BE || dst_pix_fmt == PIX_FMT_BGR555LE) &&
594 (src_pix_fmt == PIX_FMT_RGB565BE || src_pix_fmt == PIX_FMT_RGB565LE ||
595 src_pix_fmt == PIX_FMT_BGR565BE || src_pix_fmt == PIX_FMT_BGR565LE)))
596 loss |= FF_LOSS_DEPTH;
597 if (dst_desc->log2_chroma_w > src_desc->log2_chroma_w ||
598 dst_desc->log2_chroma_h > src_desc->log2_chroma_h)
599 loss |= FF_LOSS_RESOLUTION;
600 switch(pf->color_type) {
602 if (ps->color_type != FF_COLOR_RGB &&
603 ps->color_type != FF_COLOR_GRAY)
604 loss |= FF_LOSS_COLORSPACE;
607 if (ps->color_type != FF_COLOR_GRAY)
608 loss |= FF_LOSS_COLORSPACE;
611 if (ps->color_type != FF_COLOR_YUV)
612 loss |= FF_LOSS_COLORSPACE;
614 case FF_COLOR_YUV_JPEG:
615 if (ps->color_type != FF_COLOR_YUV_JPEG &&
616 ps->color_type != FF_COLOR_YUV &&
617 ps->color_type != FF_COLOR_GRAY)
618 loss |= FF_LOSS_COLORSPACE;
622 if (ps->color_type != pf->color_type)
623 loss |= FF_LOSS_COLORSPACE;
626 if (pf->color_type == FF_COLOR_GRAY &&
627 ps->color_type != FF_COLOR_GRAY)
628 loss |= FF_LOSS_CHROMA;
629 if (!pf->is_alpha && (ps->is_alpha && has_alpha))
630 loss |= FF_LOSS_ALPHA;
631 if (pf->pixel_type == FF_PIXEL_PALETTE &&
632 (ps->pixel_type != FF_PIXEL_PALETTE && ps->color_type != FF_COLOR_GRAY))
633 loss |= FF_LOSS_COLORQUANT;
637 static int avg_bits_per_pixel(enum PixelFormat pix_fmt)
640 const PixFmtInfo *pf;
641 const AVPixFmtDescriptor *desc = &av_pix_fmt_descriptors[pix_fmt];
643 pf = &pix_fmt_info[pix_fmt];
644 switch(pf->pixel_type) {
645 case FF_PIXEL_PACKED:
647 case PIX_FMT_YUYV422:
648 case PIX_FMT_UYVY422:
649 case PIX_FMT_RGB565BE:
650 case PIX_FMT_RGB565LE:
651 case PIX_FMT_RGB555BE:
652 case PIX_FMT_RGB555LE:
653 case PIX_FMT_RGB444BE:
654 case PIX_FMT_RGB444LE:
655 case PIX_FMT_BGR565BE:
656 case PIX_FMT_BGR565LE:
657 case PIX_FMT_BGR555BE:
658 case PIX_FMT_BGR555LE:
659 case PIX_FMT_BGR444BE:
660 case PIX_FMT_BGR444LE:
663 case PIX_FMT_UYYVYY411:
667 bits = pf->depth * pf->nb_channels;
671 case FF_PIXEL_PLANAR:
672 if (desc->log2_chroma_w == 0 && desc->log2_chroma_h == 0) {
673 bits = pf->depth * pf->nb_channels;
675 bits = pf->depth + ((2 * pf->depth) >>
676 (desc->log2_chroma_w + desc->log2_chroma_h));
679 case FF_PIXEL_PALETTE:
689 static enum PixelFormat avcodec_find_best_pix_fmt1(int64_t pix_fmt_mask,
690 enum PixelFormat src_pix_fmt,
694 int dist, i, loss, min_dist;
695 enum PixelFormat dst_pix_fmt;
697 /* find exact color match with smallest size */
698 dst_pix_fmt = PIX_FMT_NONE;
699 min_dist = 0x7fffffff;
700 for(i = 0;i < PIX_FMT_NB; i++) {
701 if (pix_fmt_mask & (1ULL << i)) {
702 loss = avcodec_get_pix_fmt_loss(i, src_pix_fmt, has_alpha) & loss_mask;
704 dist = avg_bits_per_pixel(i);
705 if (dist < min_dist) {
715 enum PixelFormat avcodec_find_best_pix_fmt(int64_t pix_fmt_mask, enum PixelFormat src_pix_fmt,
716 int has_alpha, int *loss_ptr)
718 enum PixelFormat dst_pix_fmt;
720 static const int loss_mask_order[] = {
721 ~0, /* no loss first */
724 ~(FF_LOSS_COLORSPACE | FF_LOSS_RESOLUTION),
730 /* try with successive loss */
733 loss_mask = loss_mask_order[i++];
734 dst_pix_fmt = avcodec_find_best_pix_fmt1(pix_fmt_mask, src_pix_fmt,
735 has_alpha, loss_mask);
736 if (dst_pix_fmt >= 0)
744 *loss_ptr = avcodec_get_pix_fmt_loss(dst_pix_fmt, src_pix_fmt, has_alpha);
748 #if LIBAVCODEC_VERSION_MAJOR < 53
749 void ff_img_copy_plane(uint8_t *dst, int dst_wrap,
750 const uint8_t *src, int src_wrap,
751 int width, int height)
753 av_image_copy_plane(dst, dst_wrap, src, src_wrap, width, height);
756 int ff_get_plane_bytewidth(enum PixelFormat pix_fmt, int width, int plane)
758 return av_image_get_linesize(pix_fmt, width, plane);
761 void av_picture_data_copy(uint8_t *dst_data[4], int dst_linesize[4],
762 uint8_t *src_data[4], int src_linesize[4],
763 enum PixelFormat pix_fmt, int width, int height)
765 av_image_copy(dst_data, dst_linesize, src_data, src_linesize,
766 pix_fmt, width, height);
770 void av_picture_copy(AVPicture *dst, const AVPicture *src,
771 enum PixelFormat pix_fmt, int width, int height)
773 av_image_copy(dst->data, dst->linesize, src->data,
774 src->linesize, pix_fmt, width, height);
778 void ff_shrink22(uint8_t *dst, int dst_wrap,
779 const uint8_t *src, int src_wrap,
780 int width, int height)
783 const uint8_t *s1, *s2;
786 for(;height > 0; height--) {
790 for(w = width;w >= 4; w-=4) {
791 d[0] = (s1[0] + s1[1] + s2[0] + s2[1] + 2) >> 2;
792 d[1] = (s1[2] + s1[3] + s2[2] + s2[3] + 2) >> 2;
793 d[2] = (s1[4] + s1[5] + s2[4] + s2[5] + 2) >> 2;
794 d[3] = (s1[6] + s1[7] + s2[6] + s2[7] + 2) >> 2;
800 d[0] = (s1[0] + s1[1] + s2[0] + s2[1] + 2) >> 2;
811 void ff_shrink44(uint8_t *dst, int dst_wrap,
812 const uint8_t *src, int src_wrap,
813 int width, int height)
816 const uint8_t *s1, *s2, *s3, *s4;
819 for(;height > 0; height--) {
825 for(w = width;w > 0; w--) {
826 d[0] = (s1[0] + s1[1] + s1[2] + s1[3] +
827 s2[0] + s2[1] + s2[2] + s2[3] +
828 s3[0] + s3[1] + s3[2] + s3[3] +
829 s4[0] + s4[1] + s4[2] + s4[3] + 8) >> 4;
842 void ff_shrink88(uint8_t *dst, int dst_wrap,
843 const uint8_t *src, int src_wrap,
844 int width, int height)
848 for(;height > 0; height--) {
849 for(w = width;w > 0; w--) {
852 tmp += src[0] + src[1] + src[2] + src[3] + src[4] + src[5] + src[6] + src[7];
855 *(dst++) = (tmp + 32)>>6;
856 src += 8 - 8*src_wrap;
858 src += 8*src_wrap - 8*width;
859 dst += dst_wrap - width;
864 int avpicture_alloc(AVPicture *picture,
865 enum PixelFormat pix_fmt, int width, int height)
870 size = avpicture_fill(picture, NULL, pix_fmt, width, height);
873 ptr = av_malloc(size);
876 avpicture_fill(picture, ptr, pix_fmt, width, height);
877 if(picture->data[1] && !picture->data[2])
878 ff_set_systematic_pal2((uint32_t*)picture->data[1], pix_fmt);
882 memset(picture, 0, sizeof(AVPicture));
886 void avpicture_free(AVPicture *picture)
888 av_free(picture->data[0]);
891 /* return true if yuv planar */
892 static inline int is_yuv_planar(const PixFmtInfo *ps)
894 return (ps->color_type == FF_COLOR_YUV ||
895 ps->color_type == FF_COLOR_YUV_JPEG) &&
896 ps->pixel_type == FF_PIXEL_PLANAR;
899 int av_picture_crop(AVPicture *dst, const AVPicture *src,
900 enum PixelFormat pix_fmt, int top_band, int left_band)
905 if (pix_fmt < 0 || pix_fmt >= PIX_FMT_NB || !is_yuv_planar(&pix_fmt_info[pix_fmt]))
908 y_shift = av_pix_fmt_descriptors[pix_fmt].log2_chroma_h;
909 x_shift = av_pix_fmt_descriptors[pix_fmt].log2_chroma_w;
911 dst->data[0] = src->data[0] + (top_band * src->linesize[0]) + left_band;
912 dst->data[1] = src->data[1] + ((top_band >> y_shift) * src->linesize[1]) + (left_band >> x_shift);
913 dst->data[2] = src->data[2] + ((top_band >> y_shift) * src->linesize[2]) + (left_band >> x_shift);
915 dst->linesize[0] = src->linesize[0];
916 dst->linesize[1] = src->linesize[1];
917 dst->linesize[2] = src->linesize[2];
921 int av_picture_pad(AVPicture *dst, const AVPicture *src, int height, int width,
922 enum PixelFormat pix_fmt, int padtop, int padbottom, int padleft, int padright,
931 if (pix_fmt < 0 || pix_fmt >= PIX_FMT_NB ||
932 !is_yuv_planar(&pix_fmt_info[pix_fmt])) return -1;
934 for (i = 0; i < 3; i++) {
935 x_shift = i ? av_pix_fmt_descriptors[pix_fmt].log2_chroma_w : 0;
936 y_shift = i ? av_pix_fmt_descriptors[pix_fmt].log2_chroma_h : 0;
938 if (padtop || padleft) {
939 memset(dst->data[i], color[i],
940 dst->linesize[i] * (padtop >> y_shift) + (padleft >> x_shift));
943 if (padleft || padright) {
944 optr = dst->data[i] + dst->linesize[i] * (padtop >> y_shift) +
945 (dst->linesize[i] - (padright >> x_shift));
946 yheight = (height - 1 - (padtop + padbottom)) >> y_shift;
947 for (y = 0; y < yheight; y++) {
948 memset(optr, color[i], (padleft + padright) >> x_shift);
949 optr += dst->linesize[i];
953 if (src) { /* first line */
954 uint8_t *iptr = src->data[i];
955 optr = dst->data[i] + dst->linesize[i] * (padtop >> y_shift) +
956 (padleft >> x_shift);
957 memcpy(optr, iptr, (width - padleft - padright) >> x_shift);
958 iptr += src->linesize[i];
959 optr = dst->data[i] + dst->linesize[i] * (padtop >> y_shift) +
960 (dst->linesize[i] - (padright >> x_shift));
961 yheight = (height - 1 - (padtop + padbottom)) >> y_shift;
962 for (y = 0; y < yheight; y++) {
963 memset(optr, color[i], (padleft + padright) >> x_shift);
964 memcpy(optr + ((padleft + padright) >> x_shift), iptr,
965 (width - padleft - padright) >> x_shift);
966 iptr += src->linesize[i];
967 optr += dst->linesize[i];
971 if (padbottom || padright) {
972 optr = dst->data[i] + dst->linesize[i] *
973 ((height - padbottom) >> y_shift) - (padright >> x_shift);
974 memset(optr, color[i],dst->linesize[i] *
975 (padbottom >> y_shift) + (padright >> x_shift));
981 /* NOTE: we scan all the pixels to have an exact information */
982 static int get_alpha_info_pal8(const AVPicture *src, int width, int height)
984 const unsigned char *p;
985 int src_wrap, ret, x, y;
987 uint32_t *palette = (uint32_t *)src->data[1];
990 src_wrap = src->linesize[0] - width;
992 for(y=0;y<height;y++) {
993 for(x=0;x<width;x++) {
994 a = palette[p[0]] >> 24;
996 ret |= FF_ALPHA_TRANSP;
997 } else if (a != 0xff) {
998 ret |= FF_ALPHA_SEMI_TRANSP;
1007 int img_get_alpha_info(const AVPicture *src,
1008 enum PixelFormat pix_fmt, int width, int height)
1010 const PixFmtInfo *pf = &pix_fmt_info[pix_fmt];
1013 /* no alpha can be represented in format */
1018 ret = get_alpha_info_pal8(src, width, height);
1021 /* we do not know, so everything is indicated */
1022 ret = FF_ALPHA_TRANSP | FF_ALPHA_SEMI_TRANSP;
1028 #if !(HAVE_MMX && HAVE_YASM)
1029 /* filter parameters: [-1 4 2 4 -1] // 8 */
1030 static void deinterlace_line_c(uint8_t *dst,
1031 const uint8_t *lum_m4, const uint8_t *lum_m3,
1032 const uint8_t *lum_m2, const uint8_t *lum_m1,
1036 uint8_t *cm = ff_cropTbl + MAX_NEG_CROP;
1039 for(;size > 0;size--) {
1041 sum += lum_m3[0] << 2;
1042 sum += lum_m2[0] << 1;
1043 sum += lum_m1[0] << 2;
1045 dst[0] = cm[(sum + 4) >> 3];
1055 static void deinterlace_line_inplace_c(uint8_t *lum_m4, uint8_t *lum_m3,
1056 uint8_t *lum_m2, uint8_t *lum_m1,
1057 uint8_t *lum, int size)
1059 uint8_t *cm = ff_cropTbl + MAX_NEG_CROP;
1062 for(;size > 0;size--) {
1064 sum += lum_m3[0] << 2;
1065 sum += lum_m2[0] << 1;
1066 lum_m4[0]=lum_m2[0];
1067 sum += lum_m1[0] << 2;
1069 lum_m2[0] = cm[(sum + 4) >> 3];
1079 /* deinterlacing : 2 temporal taps, 3 spatial taps linear filter. The
1080 top field is copied as is, but the bottom field is deinterlaced
1081 against the top field. */
1082 static void deinterlace_bottom_field(uint8_t *dst, int dst_wrap,
1083 const uint8_t *src1, int src_wrap,
1084 int width, int height)
1086 const uint8_t *src_m2, *src_m1, *src_0, *src_p1, *src_p2;
1091 src_0=&src_m1[src_wrap];
1092 src_p1=&src_0[src_wrap];
1093 src_p2=&src_p1[src_wrap];
1094 for(y=0;y<(height-2);y+=2) {
1095 memcpy(dst,src_m1,width);
1097 deinterlace_line(dst,src_m2,src_m1,src_0,src_p1,src_p2,width);
1101 src_p1 += 2*src_wrap;
1102 src_p2 += 2*src_wrap;
1105 memcpy(dst,src_m1,width);
1108 deinterlace_line(dst,src_m2,src_m1,src_0,src_0,src_0,width);
1111 static void deinterlace_bottom_field_inplace(uint8_t *src1, int src_wrap,
1112 int width, int height)
1114 uint8_t *src_m1, *src_0, *src_p1, *src_p2;
1117 buf = (uint8_t*)av_malloc(width);
1120 memcpy(buf,src_m1,width);
1121 src_0=&src_m1[src_wrap];
1122 src_p1=&src_0[src_wrap];
1123 src_p2=&src_p1[src_wrap];
1124 for(y=0;y<(height-2);y+=2) {
1125 deinterlace_line_inplace(buf,src_m1,src_0,src_p1,src_p2,width);
1128 src_p1 += 2*src_wrap;
1129 src_p2 += 2*src_wrap;
1132 deinterlace_line_inplace(buf,src_m1,src_0,src_0,src_0,width);
1136 int avpicture_deinterlace(AVPicture *dst, const AVPicture *src,
1137 enum PixelFormat pix_fmt, int width, int height)
1141 if (pix_fmt != PIX_FMT_YUV420P &&
1142 pix_fmt != PIX_FMT_YUVJ420P &&
1143 pix_fmt != PIX_FMT_YUV422P &&
1144 pix_fmt != PIX_FMT_YUVJ422P &&
1145 pix_fmt != PIX_FMT_YUV444P &&
1146 pix_fmt != PIX_FMT_YUV411P &&
1147 pix_fmt != PIX_FMT_GRAY8)
1149 if ((width & 3) != 0 || (height & 3) != 0)
1155 case PIX_FMT_YUVJ420P:
1156 case PIX_FMT_YUV420P:
1160 case PIX_FMT_YUV422P:
1161 case PIX_FMT_YUVJ422P:
1164 case PIX_FMT_YUV411P:
1170 if (pix_fmt == PIX_FMT_GRAY8) {
1175 deinterlace_bottom_field_inplace(dst->data[i], dst->linesize[i],
1178 deinterlace_bottom_field(dst->data[i],dst->linesize[i],
1179 src->data[i], src->linesize[i],