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"
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 (pix_fmt < 0 || pix_fmt >= PIX_FMT_NB)
425 return av_pix_fmt_descriptors[pix_fmt].name;
428 #if LIBAVCODEC_VERSION_MAJOR < 53
429 enum PixelFormat avcodec_get_pix_fmt(const char *name)
431 return av_get_pix_fmt(name);
435 void avcodec_pix_fmt_string (char *buf, int buf_size, enum PixelFormat pix_fmt)
439 snprintf (buf, buf_size,
440 "name " " nb_channels" " depth" " is_alpha"
443 PixFmtInfo info= pix_fmt_info[pix_fmt];
445 char is_alpha_char= info.is_alpha ? 'y' : 'n';
447 snprintf (buf, buf_size,
449 av_pix_fmt_descriptors[pix_fmt].name,
457 int ff_is_hwaccel_pix_fmt(enum PixelFormat pix_fmt)
459 return av_pix_fmt_descriptors[pix_fmt].flags & PIX_FMT_HWACCEL;
462 int ff_set_systematic_pal(uint32_t pal[256], enum PixelFormat pix_fmt){
465 for(i=0; i<256; i++){
479 case PIX_FMT_RGB4_BYTE:
484 case PIX_FMT_BGR4_BYTE:
495 pal[i] = b + (g<<8) + (r<<16);
501 #if LIBAVCODEC_VERSION_MAJOR < 53
502 int ff_fill_linesize(AVPicture *picture, enum PixelFormat pix_fmt, int width)
504 return av_image_fill_linesizes(picture->linesize, pix_fmt, width);
507 int ff_fill_pointer(AVPicture *picture, uint8_t *ptr, enum PixelFormat pix_fmt,
510 return av_image_fill_pointers(picture->data, pix_fmt, height, ptr, picture->linesize);
514 int avpicture_fill(AVPicture *picture, uint8_t *ptr,
515 enum PixelFormat pix_fmt, int width, int height)
518 if(av_image_check_size(width, height, 0, NULL))
521 if (av_image_fill_linesizes(picture->linesize, pix_fmt, width))
524 return av_image_fill_pointers(picture->data, pix_fmt, height, ptr, picture->linesize);
527 int avpicture_layout(const AVPicture* src, enum PixelFormat pix_fmt, int width, int height,
528 unsigned char *dest, int dest_size)
530 const PixFmtInfo* pf = &pix_fmt_info[pix_fmt];
531 const AVPixFmtDescriptor *desc = &av_pix_fmt_descriptors[pix_fmt];
532 int i, j, w, ow, h, oh, data_planes;
533 const unsigned char* s;
534 int size = avpicture_get_size(pix_fmt, width, height);
536 if (size > dest_size || size < 0)
539 if (pf->pixel_type == FF_PIXEL_PACKED || pf->pixel_type == FF_PIXEL_PALETTE) {
540 if (pix_fmt == PIX_FMT_YUYV422 ||
541 pix_fmt == PIX_FMT_UYVY422 ||
542 pix_fmt == PIX_FMT_BGR565BE ||
543 pix_fmt == PIX_FMT_BGR565LE ||
544 pix_fmt == PIX_FMT_BGR555BE ||
545 pix_fmt == PIX_FMT_BGR555LE ||
546 pix_fmt == PIX_FMT_BGR444BE ||
547 pix_fmt == PIX_FMT_BGR444LE ||
548 pix_fmt == PIX_FMT_RGB565BE ||
549 pix_fmt == PIX_FMT_RGB565LE ||
550 pix_fmt == PIX_FMT_RGB555BE ||
551 pix_fmt == PIX_FMT_RGB555LE ||
552 pix_fmt == PIX_FMT_RGB444BE ||
553 pix_fmt == PIX_FMT_RGB444LE)
555 else if (pix_fmt == PIX_FMT_UYYVYY411)
557 else if (pix_fmt == PIX_FMT_PAL8)
560 w = width * (pf->depth * pf->nb_channels / 8);
565 data_planes = pf->nb_channels;
566 w = (width*pf->depth + 7)/8;
573 for (i=0; i<data_planes; i++) {
575 w = (- ((-width) >> desc->log2_chroma_w) * pf->depth + 7) / 8;
576 h = -((-height) >> desc->log2_chroma_h);
577 if (pix_fmt == PIX_FMT_NV12 || pix_fmt == PIX_FMT_NV21)
587 s += src->linesize[i];
591 if (pf->pixel_type == FF_PIXEL_PALETTE)
592 memcpy((unsigned char *)(((size_t)dest + 3) & ~3), src->data[1], 256 * 4);
597 int avpicture_get_size(enum PixelFormat pix_fmt, int width, int height)
599 AVPicture dummy_pict;
600 if(av_image_check_size(width, height, 0, NULL))
605 case PIX_FMT_RGB4_BYTE:
606 case PIX_FMT_BGR4_BYTE:
608 // do not include palette for these pseudo-paletted formats
609 return width * height;
611 return avpicture_fill(&dummy_pict, NULL, pix_fmt, width, height);
614 int avcodec_get_pix_fmt_loss(enum PixelFormat dst_pix_fmt, enum PixelFormat src_pix_fmt,
617 const PixFmtInfo *pf, *ps;
618 const AVPixFmtDescriptor *src_desc = &av_pix_fmt_descriptors[src_pix_fmt];
619 const AVPixFmtDescriptor *dst_desc = &av_pix_fmt_descriptors[dst_pix_fmt];
622 ps = &pix_fmt_info[src_pix_fmt];
626 pf = &pix_fmt_info[dst_pix_fmt];
627 if (pf->depth < ps->depth ||
628 ((dst_pix_fmt == PIX_FMT_RGB555BE || dst_pix_fmt == PIX_FMT_RGB555LE ||
629 dst_pix_fmt == PIX_FMT_BGR555BE || dst_pix_fmt == PIX_FMT_BGR555LE) &&
630 (src_pix_fmt == PIX_FMT_RGB565BE || src_pix_fmt == PIX_FMT_RGB565LE ||
631 src_pix_fmt == PIX_FMT_BGR565BE || src_pix_fmt == PIX_FMT_BGR565LE)))
632 loss |= FF_LOSS_DEPTH;
633 if (dst_desc->log2_chroma_w > src_desc->log2_chroma_w ||
634 dst_desc->log2_chroma_h > src_desc->log2_chroma_h)
635 loss |= FF_LOSS_RESOLUTION;
636 switch(pf->color_type) {
638 if (ps->color_type != FF_COLOR_RGB &&
639 ps->color_type != FF_COLOR_GRAY)
640 loss |= FF_LOSS_COLORSPACE;
643 if (ps->color_type != FF_COLOR_GRAY)
644 loss |= FF_LOSS_COLORSPACE;
647 if (ps->color_type != FF_COLOR_YUV)
648 loss |= FF_LOSS_COLORSPACE;
650 case FF_COLOR_YUV_JPEG:
651 if (ps->color_type != FF_COLOR_YUV_JPEG &&
652 ps->color_type != FF_COLOR_YUV &&
653 ps->color_type != FF_COLOR_GRAY)
654 loss |= FF_LOSS_COLORSPACE;
658 if (ps->color_type != pf->color_type)
659 loss |= FF_LOSS_COLORSPACE;
662 if (pf->color_type == FF_COLOR_GRAY &&
663 ps->color_type != FF_COLOR_GRAY)
664 loss |= FF_LOSS_CHROMA;
665 if (!pf->is_alpha && (ps->is_alpha && has_alpha))
666 loss |= FF_LOSS_ALPHA;
667 if (pf->pixel_type == FF_PIXEL_PALETTE &&
668 (ps->pixel_type != FF_PIXEL_PALETTE && ps->color_type != FF_COLOR_GRAY))
669 loss |= FF_LOSS_COLORQUANT;
673 static int avg_bits_per_pixel(enum PixelFormat pix_fmt)
676 const PixFmtInfo *pf;
677 const AVPixFmtDescriptor *desc = &av_pix_fmt_descriptors[pix_fmt];
679 pf = &pix_fmt_info[pix_fmt];
680 switch(pf->pixel_type) {
681 case FF_PIXEL_PACKED:
683 case PIX_FMT_YUYV422:
684 case PIX_FMT_UYVY422:
685 case PIX_FMT_RGB565BE:
686 case PIX_FMT_RGB565LE:
687 case PIX_FMT_RGB555BE:
688 case PIX_FMT_RGB555LE:
689 case PIX_FMT_RGB444BE:
690 case PIX_FMT_RGB444LE:
691 case PIX_FMT_BGR565BE:
692 case PIX_FMT_BGR565LE:
693 case PIX_FMT_BGR555BE:
694 case PIX_FMT_BGR555LE:
695 case PIX_FMT_BGR444BE:
696 case PIX_FMT_BGR444LE:
699 case PIX_FMT_UYYVYY411:
703 bits = pf->depth * pf->nb_channels;
707 case FF_PIXEL_PLANAR:
708 if (desc->log2_chroma_w == 0 && desc->log2_chroma_h == 0) {
709 bits = pf->depth * pf->nb_channels;
711 bits = pf->depth + ((2 * pf->depth) >>
712 (desc->log2_chroma_w + desc->log2_chroma_h));
715 case FF_PIXEL_PALETTE:
725 static enum PixelFormat avcodec_find_best_pix_fmt1(int64_t pix_fmt_mask,
726 enum PixelFormat src_pix_fmt,
730 int dist, i, loss, min_dist;
731 enum PixelFormat dst_pix_fmt;
733 /* find exact color match with smallest size */
734 dst_pix_fmt = PIX_FMT_NONE;
735 min_dist = 0x7fffffff;
736 for(i = 0;i < PIX_FMT_NB; i++) {
737 if (pix_fmt_mask & (1ULL << i)) {
738 loss = avcodec_get_pix_fmt_loss(i, src_pix_fmt, has_alpha) & loss_mask;
740 dist = avg_bits_per_pixel(i);
741 if (dist < min_dist) {
751 enum PixelFormat avcodec_find_best_pix_fmt(int64_t pix_fmt_mask, enum PixelFormat src_pix_fmt,
752 int has_alpha, int *loss_ptr)
754 enum PixelFormat dst_pix_fmt;
756 static const int loss_mask_order[] = {
757 ~0, /* no loss first */
760 ~(FF_LOSS_COLORSPACE | FF_LOSS_RESOLUTION),
766 /* try with successive loss */
769 loss_mask = loss_mask_order[i++];
770 dst_pix_fmt = avcodec_find_best_pix_fmt1(pix_fmt_mask, src_pix_fmt,
771 has_alpha, loss_mask);
772 if (dst_pix_fmt >= 0)
780 *loss_ptr = avcodec_get_pix_fmt_loss(dst_pix_fmt, src_pix_fmt, has_alpha);
784 #if LIBAVCODEC_VERSION_MAJOR < 53
785 void ff_img_copy_plane(uint8_t *dst, int dst_wrap,
786 const uint8_t *src, int src_wrap,
787 int width, int height)
789 av_image_copy_plane(dst, dst_wrap, src, src_wrap, width, height);
792 int ff_get_plane_bytewidth(enum PixelFormat pix_fmt, int width, int plane)
794 return av_image_get_linesize(pix_fmt, width, plane);
797 void av_picture_data_copy(uint8_t *dst_data[4], int dst_linesize[4],
798 uint8_t *src_data[4], int src_linesize[4],
799 enum PixelFormat pix_fmt, int width, int height)
801 av_image_copy(dst_data, dst_linesize, src_data, src_linesize,
802 pix_fmt, width, height);
806 void av_picture_copy(AVPicture *dst, const AVPicture *src,
807 enum PixelFormat pix_fmt, int width, int height)
809 av_image_copy(dst->data, dst->linesize, src->data,
810 src->linesize, pix_fmt, width, height);
814 void ff_shrink22(uint8_t *dst, int dst_wrap,
815 const uint8_t *src, int src_wrap,
816 int width, int height)
819 const uint8_t *s1, *s2;
822 for(;height > 0; height--) {
826 for(w = width;w >= 4; w-=4) {
827 d[0] = (s1[0] + s1[1] + s2[0] + s2[1] + 2) >> 2;
828 d[1] = (s1[2] + s1[3] + s2[2] + s2[3] + 2) >> 2;
829 d[2] = (s1[4] + s1[5] + s2[4] + s2[5] + 2) >> 2;
830 d[3] = (s1[6] + s1[7] + s2[6] + s2[7] + 2) >> 2;
836 d[0] = (s1[0] + s1[1] + s2[0] + s2[1] + 2) >> 2;
847 void ff_shrink44(uint8_t *dst, int dst_wrap,
848 const uint8_t *src, int src_wrap,
849 int width, int height)
852 const uint8_t *s1, *s2, *s3, *s4;
855 for(;height > 0; height--) {
861 for(w = width;w > 0; w--) {
862 d[0] = (s1[0] + s1[1] + s1[2] + s1[3] +
863 s2[0] + s2[1] + s2[2] + s2[3] +
864 s3[0] + s3[1] + s3[2] + s3[3] +
865 s4[0] + s4[1] + s4[2] + s4[3] + 8) >> 4;
878 void ff_shrink88(uint8_t *dst, int dst_wrap,
879 const uint8_t *src, int src_wrap,
880 int width, int height)
884 for(;height > 0; height--) {
885 for(w = width;w > 0; w--) {
888 tmp += src[0] + src[1] + src[2] + src[3] + src[4] + src[5] + src[6] + src[7];
891 *(dst++) = (tmp + 32)>>6;
892 src += 8 - 8*src_wrap;
894 src += 8*src_wrap - 8*width;
895 dst += dst_wrap - width;
900 int avpicture_alloc(AVPicture *picture,
901 enum PixelFormat pix_fmt, int width, int height)
906 size = avpicture_fill(picture, NULL, pix_fmt, width, height);
909 ptr = av_malloc(size);
912 avpicture_fill(picture, ptr, pix_fmt, width, height);
913 if(picture->data[1] && !picture->data[2])
914 ff_set_systematic_pal((uint32_t*)picture->data[1], pix_fmt);
918 memset(picture, 0, sizeof(AVPicture));
922 void avpicture_free(AVPicture *picture)
924 av_free(picture->data[0]);
927 /* return true if yuv planar */
928 static inline int is_yuv_planar(const PixFmtInfo *ps)
930 return (ps->color_type == FF_COLOR_YUV ||
931 ps->color_type == FF_COLOR_YUV_JPEG) &&
932 ps->pixel_type == FF_PIXEL_PLANAR;
935 int av_picture_crop(AVPicture *dst, const AVPicture *src,
936 enum PixelFormat pix_fmt, int top_band, int left_band)
941 if (pix_fmt < 0 || pix_fmt >= PIX_FMT_NB || !is_yuv_planar(&pix_fmt_info[pix_fmt]))
944 y_shift = av_pix_fmt_descriptors[pix_fmt].log2_chroma_h;
945 x_shift = av_pix_fmt_descriptors[pix_fmt].log2_chroma_w;
947 dst->data[0] = src->data[0] + (top_band * src->linesize[0]) + left_band;
948 dst->data[1] = src->data[1] + ((top_band >> y_shift) * src->linesize[1]) + (left_band >> x_shift);
949 dst->data[2] = src->data[2] + ((top_band >> y_shift) * src->linesize[2]) + (left_band >> x_shift);
951 dst->linesize[0] = src->linesize[0];
952 dst->linesize[1] = src->linesize[1];
953 dst->linesize[2] = src->linesize[2];
957 int av_picture_pad(AVPicture *dst, const AVPicture *src, int height, int width,
958 enum PixelFormat pix_fmt, int padtop, int padbottom, int padleft, int padright,
967 if (pix_fmt < 0 || pix_fmt >= PIX_FMT_NB ||
968 !is_yuv_planar(&pix_fmt_info[pix_fmt])) return -1;
970 for (i = 0; i < 3; i++) {
971 x_shift = i ? av_pix_fmt_descriptors[pix_fmt].log2_chroma_w : 0;
972 y_shift = i ? av_pix_fmt_descriptors[pix_fmt].log2_chroma_h : 0;
974 if (padtop || padleft) {
975 memset(dst->data[i], color[i],
976 dst->linesize[i] * (padtop >> y_shift) + (padleft >> x_shift));
979 if (padleft || padright) {
980 optr = dst->data[i] + dst->linesize[i] * (padtop >> y_shift) +
981 (dst->linesize[i] - (padright >> x_shift));
982 yheight = (height - 1 - (padtop + padbottom)) >> y_shift;
983 for (y = 0; y < yheight; y++) {
984 memset(optr, color[i], (padleft + padright) >> x_shift);
985 optr += dst->linesize[i];
989 if (src) { /* first line */
990 uint8_t *iptr = src->data[i];
991 optr = dst->data[i] + dst->linesize[i] * (padtop >> y_shift) +
992 (padleft >> x_shift);
993 memcpy(optr, iptr, (width - padleft - padright) >> x_shift);
994 iptr += src->linesize[i];
995 optr = dst->data[i] + dst->linesize[i] * (padtop >> y_shift) +
996 (dst->linesize[i] - (padright >> x_shift));
997 yheight = (height - 1 - (padtop + padbottom)) >> y_shift;
998 for (y = 0; y < yheight; y++) {
999 memset(optr, color[i], (padleft + padright) >> x_shift);
1000 memcpy(optr + ((padleft + padright) >> x_shift), iptr,
1001 (width - padleft - padright) >> x_shift);
1002 iptr += src->linesize[i];
1003 optr += dst->linesize[i];
1007 if (padbottom || padright) {
1008 optr = dst->data[i] + dst->linesize[i] *
1009 ((height - padbottom) >> y_shift) - (padright >> x_shift);
1010 memset(optr, color[i],dst->linesize[i] *
1011 (padbottom >> y_shift) + (padright >> x_shift));
1017 /* NOTE: we scan all the pixels to have an exact information */
1018 static int get_alpha_info_pal8(const AVPicture *src, int width, int height)
1020 const unsigned char *p;
1021 int src_wrap, ret, x, y;
1023 uint32_t *palette = (uint32_t *)src->data[1];
1026 src_wrap = src->linesize[0] - width;
1028 for(y=0;y<height;y++) {
1029 for(x=0;x<width;x++) {
1030 a = palette[p[0]] >> 24;
1032 ret |= FF_ALPHA_TRANSP;
1033 } else if (a != 0xff) {
1034 ret |= FF_ALPHA_SEMI_TRANSP;
1043 int img_get_alpha_info(const AVPicture *src,
1044 enum PixelFormat pix_fmt, int width, int height)
1046 const PixFmtInfo *pf = &pix_fmt_info[pix_fmt];
1049 /* no alpha can be represented in format */
1054 ret = get_alpha_info_pal8(src, width, height);
1057 /* we do not know, so everything is indicated */
1058 ret = FF_ALPHA_TRANSP | FF_ALPHA_SEMI_TRANSP;
1064 #if !(HAVE_MMX && HAVE_YASM)
1065 /* filter parameters: [-1 4 2 4 -1] // 8 */
1066 static void deinterlace_line_c(uint8_t *dst,
1067 const uint8_t *lum_m4, const uint8_t *lum_m3,
1068 const uint8_t *lum_m2, const uint8_t *lum_m1,
1072 uint8_t *cm = ff_cropTbl + MAX_NEG_CROP;
1075 for(;size > 0;size--) {
1077 sum += lum_m3[0] << 2;
1078 sum += lum_m2[0] << 1;
1079 sum += lum_m1[0] << 2;
1081 dst[0] = cm[(sum + 4) >> 3];
1091 static void deinterlace_line_inplace_c(uint8_t *lum_m4, uint8_t *lum_m3,
1092 uint8_t *lum_m2, uint8_t *lum_m1,
1093 uint8_t *lum, int size)
1095 uint8_t *cm = ff_cropTbl + MAX_NEG_CROP;
1098 for(;size > 0;size--) {
1100 sum += lum_m3[0] << 2;
1101 sum += lum_m2[0] << 1;
1102 lum_m4[0]=lum_m2[0];
1103 sum += lum_m1[0] << 2;
1105 lum_m2[0] = cm[(sum + 4) >> 3];
1115 /* deinterlacing : 2 temporal taps, 3 spatial taps linear filter. The
1116 top field is copied as is, but the bottom field is deinterlaced
1117 against the top field. */
1118 static void deinterlace_bottom_field(uint8_t *dst, int dst_wrap,
1119 const uint8_t *src1, int src_wrap,
1120 int width, int height)
1122 const uint8_t *src_m2, *src_m1, *src_0, *src_p1, *src_p2;
1127 src_0=&src_m1[src_wrap];
1128 src_p1=&src_0[src_wrap];
1129 src_p2=&src_p1[src_wrap];
1130 for(y=0;y<(height-2);y+=2) {
1131 memcpy(dst,src_m1,width);
1133 deinterlace_line(dst,src_m2,src_m1,src_0,src_p1,src_p2,width);
1137 src_p1 += 2*src_wrap;
1138 src_p2 += 2*src_wrap;
1141 memcpy(dst,src_m1,width);
1144 deinterlace_line(dst,src_m2,src_m1,src_0,src_0,src_0,width);
1147 static void deinterlace_bottom_field_inplace(uint8_t *src1, int src_wrap,
1148 int width, int height)
1150 uint8_t *src_m1, *src_0, *src_p1, *src_p2;
1153 buf = (uint8_t*)av_malloc(width);
1156 memcpy(buf,src_m1,width);
1157 src_0=&src_m1[src_wrap];
1158 src_p1=&src_0[src_wrap];
1159 src_p2=&src_p1[src_wrap];
1160 for(y=0;y<(height-2);y+=2) {
1161 deinterlace_line_inplace(buf,src_m1,src_0,src_p1,src_p2,width);
1164 src_p1 += 2*src_wrap;
1165 src_p2 += 2*src_wrap;
1168 deinterlace_line_inplace(buf,src_m1,src_0,src_0,src_0,width);
1172 int avpicture_deinterlace(AVPicture *dst, const AVPicture *src,
1173 enum PixelFormat pix_fmt, int width, int height)
1177 if (pix_fmt != PIX_FMT_YUV420P &&
1178 pix_fmt != PIX_FMT_YUVJ420P &&
1179 pix_fmt != PIX_FMT_YUV422P &&
1180 pix_fmt != PIX_FMT_YUV444P &&
1181 pix_fmt != PIX_FMT_YUV411P &&
1182 pix_fmt != PIX_FMT_GRAY8)
1184 if ((width & 3) != 0 || (height & 3) != 0)
1190 case PIX_FMT_YUVJ420P:
1191 case PIX_FMT_YUV420P:
1195 case PIX_FMT_YUV422P:
1198 case PIX_FMT_YUV411P:
1204 if (pix_fmt == PIX_FMT_GRAY8) {
1209 deinterlace_bottom_field_inplace(dst->data[i], dst->linesize[i],
1212 deinterlace_bottom_field(dst->data[i],dst->linesize[i],
1213 src->data[i], src->linesize[i],