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_components" " depth"
444 const AVPixFmtDescriptor *pixdesc = &av_pix_fmt_descriptors[pix_fmt];
445 snprintf (buf, buf_size,
448 pixdesc->nb_components,
449 av_get_bits_per_pixel(pixdesc)
454 int ff_is_hwaccel_pix_fmt(enum PixelFormat pix_fmt)
456 return av_pix_fmt_descriptors[pix_fmt].flags & PIX_FMT_HWACCEL;
459 #if LIBAVCODEC_VERSION_MAJOR < 53
460 int ff_set_systematic_pal(uint32_t pal[256], enum PixelFormat pix_fmt){
461 return ff_set_systematic_pal2(pal, pix_fmt);
464 int ff_fill_linesize(AVPicture *picture, enum PixelFormat pix_fmt, int width)
466 return av_image_fill_linesizes(picture->linesize, pix_fmt, width);
469 int ff_fill_pointer(AVPicture *picture, uint8_t *ptr, enum PixelFormat pix_fmt,
472 return av_image_fill_pointers(picture->data, pix_fmt, height, ptr, picture->linesize);
476 int avpicture_fill(AVPicture *picture, uint8_t *ptr,
477 enum PixelFormat pix_fmt, int width, int height)
481 if ((ret = av_image_check_size(width, height, 0, NULL)) < 0)
484 if ((ret = av_image_fill_linesizes(picture->linesize, pix_fmt, width)) < 0)
487 return av_image_fill_pointers(picture->data, pix_fmt, height, ptr, picture->linesize);
490 int avpicture_layout(const AVPicture* src, enum PixelFormat pix_fmt, int width, int height,
491 unsigned char *dest, int dest_size)
493 const PixFmtInfo* pf = &pix_fmt_info[pix_fmt];
494 const AVPixFmtDescriptor *desc = &av_pix_fmt_descriptors[pix_fmt];
495 int i, j, w, ow, h, oh, data_planes;
496 const unsigned char* s;
497 int size = avpicture_get_size(pix_fmt, width, height);
499 if (size > dest_size || size < 0)
502 if (pf->pixel_type == FF_PIXEL_PACKED || pf->pixel_type == FF_PIXEL_PALETTE) {
503 if (pix_fmt == PIX_FMT_YUYV422 ||
504 pix_fmt == PIX_FMT_UYVY422 ||
505 pix_fmt == PIX_FMT_BGR565BE ||
506 pix_fmt == PIX_FMT_BGR565LE ||
507 pix_fmt == PIX_FMT_BGR555BE ||
508 pix_fmt == PIX_FMT_BGR555LE ||
509 pix_fmt == PIX_FMT_BGR444BE ||
510 pix_fmt == PIX_FMT_BGR444LE ||
511 pix_fmt == PIX_FMT_RGB565BE ||
512 pix_fmt == PIX_FMT_RGB565LE ||
513 pix_fmt == PIX_FMT_RGB555BE ||
514 pix_fmt == PIX_FMT_RGB555LE ||
515 pix_fmt == PIX_FMT_RGB444BE ||
516 pix_fmt == PIX_FMT_RGB444LE)
518 else if (pix_fmt == PIX_FMT_UYYVYY411)
520 else if (pix_fmt == PIX_FMT_PAL8)
523 w = width * (pf->depth * pf->nb_channels / 8);
528 data_planes = pf->nb_channels;
529 w = (width*pf->depth + 7)/8;
536 for (i=0; i<data_planes; i++) {
538 w = (- ((-width) >> desc->log2_chroma_w) * pf->depth + 7) / 8;
539 h = -((-height) >> desc->log2_chroma_h);
540 if (pix_fmt == PIX_FMT_NV12 || pix_fmt == PIX_FMT_NV21)
550 s += src->linesize[i];
554 if (pf->pixel_type == FF_PIXEL_PALETTE)
555 memcpy((unsigned char *)(((size_t)dest + 3) & ~3), src->data[1], 256 * 4);
560 int avpicture_get_size(enum PixelFormat pix_fmt, int width, int height)
562 AVPicture dummy_pict;
563 if(av_image_check_size(width, height, 0, NULL))
568 case PIX_FMT_RGB4_BYTE:
569 case PIX_FMT_BGR4_BYTE:
571 // do not include palette for these pseudo-paletted formats
572 return width * height;
574 return avpicture_fill(&dummy_pict, NULL, pix_fmt, width, height);
577 int avcodec_get_pix_fmt_loss(enum PixelFormat dst_pix_fmt, enum PixelFormat src_pix_fmt,
580 const PixFmtInfo *pf, *ps;
581 const AVPixFmtDescriptor *src_desc = &av_pix_fmt_descriptors[src_pix_fmt];
582 const AVPixFmtDescriptor *dst_desc = &av_pix_fmt_descriptors[dst_pix_fmt];
585 ps = &pix_fmt_info[src_pix_fmt];
589 pf = &pix_fmt_info[dst_pix_fmt];
590 if (pf->depth < ps->depth ||
591 ((dst_pix_fmt == PIX_FMT_RGB555BE || dst_pix_fmt == PIX_FMT_RGB555LE ||
592 dst_pix_fmt == PIX_FMT_BGR555BE || dst_pix_fmt == PIX_FMT_BGR555LE) &&
593 (src_pix_fmt == PIX_FMT_RGB565BE || src_pix_fmt == PIX_FMT_RGB565LE ||
594 src_pix_fmt == PIX_FMT_BGR565BE || src_pix_fmt == PIX_FMT_BGR565LE)))
595 loss |= FF_LOSS_DEPTH;
596 if (dst_desc->log2_chroma_w > src_desc->log2_chroma_w ||
597 dst_desc->log2_chroma_h > src_desc->log2_chroma_h)
598 loss |= FF_LOSS_RESOLUTION;
599 switch(pf->color_type) {
601 if (ps->color_type != FF_COLOR_RGB &&
602 ps->color_type != FF_COLOR_GRAY)
603 loss |= FF_LOSS_COLORSPACE;
606 if (ps->color_type != FF_COLOR_GRAY)
607 loss |= FF_LOSS_COLORSPACE;
610 if (ps->color_type != FF_COLOR_YUV)
611 loss |= FF_LOSS_COLORSPACE;
613 case FF_COLOR_YUV_JPEG:
614 if (ps->color_type != FF_COLOR_YUV_JPEG &&
615 ps->color_type != FF_COLOR_YUV &&
616 ps->color_type != FF_COLOR_GRAY)
617 loss |= FF_LOSS_COLORSPACE;
621 if (ps->color_type != pf->color_type)
622 loss |= FF_LOSS_COLORSPACE;
625 if (pf->color_type == FF_COLOR_GRAY &&
626 ps->color_type != FF_COLOR_GRAY)
627 loss |= FF_LOSS_CHROMA;
628 if (!pf->is_alpha && (ps->is_alpha && has_alpha))
629 loss |= FF_LOSS_ALPHA;
630 if (pf->pixel_type == FF_PIXEL_PALETTE &&
631 (ps->pixel_type != FF_PIXEL_PALETTE && ps->color_type != FF_COLOR_GRAY))
632 loss |= FF_LOSS_COLORQUANT;
636 static int avg_bits_per_pixel(enum PixelFormat pix_fmt)
639 const PixFmtInfo *pf;
640 const AVPixFmtDescriptor *desc = &av_pix_fmt_descriptors[pix_fmt];
642 pf = &pix_fmt_info[pix_fmt];
643 switch(pf->pixel_type) {
644 case FF_PIXEL_PACKED:
646 case PIX_FMT_YUYV422:
647 case PIX_FMT_UYVY422:
648 case PIX_FMT_RGB565BE:
649 case PIX_FMT_RGB565LE:
650 case PIX_FMT_RGB555BE:
651 case PIX_FMT_RGB555LE:
652 case PIX_FMT_RGB444BE:
653 case PIX_FMT_RGB444LE:
654 case PIX_FMT_BGR565BE:
655 case PIX_FMT_BGR565LE:
656 case PIX_FMT_BGR555BE:
657 case PIX_FMT_BGR555LE:
658 case PIX_FMT_BGR444BE:
659 case PIX_FMT_BGR444LE:
662 case PIX_FMT_UYYVYY411:
666 bits = pf->depth * pf->nb_channels;
670 case FF_PIXEL_PLANAR:
671 if (desc->log2_chroma_w == 0 && desc->log2_chroma_h == 0) {
672 bits = pf->depth * pf->nb_channels;
674 bits = pf->depth + ((2 * pf->depth) >>
675 (desc->log2_chroma_w + desc->log2_chroma_h));
678 case FF_PIXEL_PALETTE:
688 static enum PixelFormat avcodec_find_best_pix_fmt1(int64_t pix_fmt_mask,
689 enum PixelFormat src_pix_fmt,
693 int dist, i, loss, min_dist;
694 enum PixelFormat dst_pix_fmt;
696 /* find exact color match with smallest size */
697 dst_pix_fmt = PIX_FMT_NONE;
698 min_dist = 0x7fffffff;
699 for(i = 0;i < PIX_FMT_NB; i++) {
700 if (pix_fmt_mask & (1ULL << i)) {
701 loss = avcodec_get_pix_fmt_loss(i, src_pix_fmt, has_alpha) & loss_mask;
703 dist = avg_bits_per_pixel(i);
704 if (dist < min_dist) {
714 enum PixelFormat avcodec_find_best_pix_fmt(int64_t pix_fmt_mask, enum PixelFormat src_pix_fmt,
715 int has_alpha, int *loss_ptr)
717 enum PixelFormat dst_pix_fmt;
719 static const int loss_mask_order[] = {
720 ~0, /* no loss first */
723 ~(FF_LOSS_COLORSPACE | FF_LOSS_RESOLUTION),
729 /* try with successive loss */
732 loss_mask = loss_mask_order[i++];
733 dst_pix_fmt = avcodec_find_best_pix_fmt1(pix_fmt_mask, src_pix_fmt,
734 has_alpha, loss_mask);
735 if (dst_pix_fmt >= 0)
743 *loss_ptr = avcodec_get_pix_fmt_loss(dst_pix_fmt, src_pix_fmt, has_alpha);
747 #if LIBAVCODEC_VERSION_MAJOR < 53
748 void ff_img_copy_plane(uint8_t *dst, int dst_wrap,
749 const uint8_t *src, int src_wrap,
750 int width, int height)
752 av_image_copy_plane(dst, dst_wrap, src, src_wrap, width, height);
755 int ff_get_plane_bytewidth(enum PixelFormat pix_fmt, int width, int plane)
757 return av_image_get_linesize(pix_fmt, width, plane);
760 void av_picture_data_copy(uint8_t *dst_data[4], int dst_linesize[4],
761 uint8_t *src_data[4], int src_linesize[4],
762 enum PixelFormat pix_fmt, int width, int height)
764 av_image_copy(dst_data, dst_linesize, src_data, src_linesize,
765 pix_fmt, width, height);
769 void av_picture_copy(AVPicture *dst, const AVPicture *src,
770 enum PixelFormat pix_fmt, int width, int height)
772 av_image_copy(dst->data, dst->linesize, src->data,
773 src->linesize, pix_fmt, width, height);
777 void ff_shrink22(uint8_t *dst, int dst_wrap,
778 const uint8_t *src, int src_wrap,
779 int width, int height)
782 const uint8_t *s1, *s2;
785 for(;height > 0; height--) {
789 for(w = width;w >= 4; w-=4) {
790 d[0] = (s1[0] + s1[1] + s2[0] + s2[1] + 2) >> 2;
791 d[1] = (s1[2] + s1[3] + s2[2] + s2[3] + 2) >> 2;
792 d[2] = (s1[4] + s1[5] + s2[4] + s2[5] + 2) >> 2;
793 d[3] = (s1[6] + s1[7] + s2[6] + s2[7] + 2) >> 2;
799 d[0] = (s1[0] + s1[1] + s2[0] + s2[1] + 2) >> 2;
810 void ff_shrink44(uint8_t *dst, int dst_wrap,
811 const uint8_t *src, int src_wrap,
812 int width, int height)
815 const uint8_t *s1, *s2, *s3, *s4;
818 for(;height > 0; height--) {
824 for(w = width;w > 0; w--) {
825 d[0] = (s1[0] + s1[1] + s1[2] + s1[3] +
826 s2[0] + s2[1] + s2[2] + s2[3] +
827 s3[0] + s3[1] + s3[2] + s3[3] +
828 s4[0] + s4[1] + s4[2] + s4[3] + 8) >> 4;
841 void ff_shrink88(uint8_t *dst, int dst_wrap,
842 const uint8_t *src, int src_wrap,
843 int width, int height)
847 for(;height > 0; height--) {
848 for(w = width;w > 0; w--) {
851 tmp += src[0] + src[1] + src[2] + src[3] + src[4] + src[5] + src[6] + src[7];
854 *(dst++) = (tmp + 32)>>6;
855 src += 8 - 8*src_wrap;
857 src += 8*src_wrap - 8*width;
858 dst += dst_wrap - width;
863 int avpicture_alloc(AVPicture *picture,
864 enum PixelFormat pix_fmt, int width, int height)
869 size = avpicture_fill(picture, NULL, pix_fmt, width, height);
872 ptr = av_malloc(size);
875 avpicture_fill(picture, ptr, pix_fmt, width, height);
876 if(picture->data[1] && !picture->data[2])
877 ff_set_systematic_pal2((uint32_t*)picture->data[1], pix_fmt);
881 memset(picture, 0, sizeof(AVPicture));
885 void avpicture_free(AVPicture *picture)
887 av_free(picture->data[0]);
890 /* return true if yuv planar */
891 static inline int is_yuv_planar(const PixFmtInfo *ps)
893 return (ps->color_type == FF_COLOR_YUV ||
894 ps->color_type == FF_COLOR_YUV_JPEG) &&
895 ps->pixel_type == FF_PIXEL_PLANAR;
898 int av_picture_crop(AVPicture *dst, const AVPicture *src,
899 enum PixelFormat pix_fmt, int top_band, int left_band)
904 if (pix_fmt < 0 || pix_fmt >= PIX_FMT_NB || !is_yuv_planar(&pix_fmt_info[pix_fmt]))
907 y_shift = av_pix_fmt_descriptors[pix_fmt].log2_chroma_h;
908 x_shift = av_pix_fmt_descriptors[pix_fmt].log2_chroma_w;
910 dst->data[0] = src->data[0] + (top_band * src->linesize[0]) + left_band;
911 dst->data[1] = src->data[1] + ((top_band >> y_shift) * src->linesize[1]) + (left_band >> x_shift);
912 dst->data[2] = src->data[2] + ((top_band >> y_shift) * src->linesize[2]) + (left_band >> x_shift);
914 dst->linesize[0] = src->linesize[0];
915 dst->linesize[1] = src->linesize[1];
916 dst->linesize[2] = src->linesize[2];
920 int av_picture_pad(AVPicture *dst, const AVPicture *src, int height, int width,
921 enum PixelFormat pix_fmt, int padtop, int padbottom, int padleft, int padright,
930 if (pix_fmt < 0 || pix_fmt >= PIX_FMT_NB ||
931 !is_yuv_planar(&pix_fmt_info[pix_fmt])) return -1;
933 for (i = 0; i < 3; i++) {
934 x_shift = i ? av_pix_fmt_descriptors[pix_fmt].log2_chroma_w : 0;
935 y_shift = i ? av_pix_fmt_descriptors[pix_fmt].log2_chroma_h : 0;
937 if (padtop || padleft) {
938 memset(dst->data[i], color[i],
939 dst->linesize[i] * (padtop >> y_shift) + (padleft >> x_shift));
942 if (padleft || padright) {
943 optr = dst->data[i] + dst->linesize[i] * (padtop >> y_shift) +
944 (dst->linesize[i] - (padright >> x_shift));
945 yheight = (height - 1 - (padtop + padbottom)) >> y_shift;
946 for (y = 0; y < yheight; y++) {
947 memset(optr, color[i], (padleft + padright) >> x_shift);
948 optr += dst->linesize[i];
952 if (src) { /* first line */
953 uint8_t *iptr = src->data[i];
954 optr = dst->data[i] + dst->linesize[i] * (padtop >> y_shift) +
955 (padleft >> x_shift);
956 memcpy(optr, iptr, (width - padleft - padright) >> x_shift);
957 iptr += src->linesize[i];
958 optr = dst->data[i] + dst->linesize[i] * (padtop >> y_shift) +
959 (dst->linesize[i] - (padright >> x_shift));
960 yheight = (height - 1 - (padtop + padbottom)) >> y_shift;
961 for (y = 0; y < yheight; y++) {
962 memset(optr, color[i], (padleft + padright) >> x_shift);
963 memcpy(optr + ((padleft + padright) >> x_shift), iptr,
964 (width - padleft - padright) >> x_shift);
965 iptr += src->linesize[i];
966 optr += dst->linesize[i];
970 if (padbottom || padright) {
971 optr = dst->data[i] + dst->linesize[i] *
972 ((height - padbottom) >> y_shift) - (padright >> x_shift);
973 memset(optr, color[i],dst->linesize[i] *
974 (padbottom >> y_shift) + (padright >> x_shift));
980 /* NOTE: we scan all the pixels to have an exact information */
981 static int get_alpha_info_pal8(const AVPicture *src, int width, int height)
983 const unsigned char *p;
984 int src_wrap, ret, x, y;
986 uint32_t *palette = (uint32_t *)src->data[1];
989 src_wrap = src->linesize[0] - width;
991 for(y=0;y<height;y++) {
992 for(x=0;x<width;x++) {
993 a = palette[p[0]] >> 24;
995 ret |= FF_ALPHA_TRANSP;
996 } else if (a != 0xff) {
997 ret |= FF_ALPHA_SEMI_TRANSP;
1006 int img_get_alpha_info(const AVPicture *src,
1007 enum PixelFormat pix_fmt, int width, int height)
1009 const PixFmtInfo *pf = &pix_fmt_info[pix_fmt];
1012 /* no alpha can be represented in format */
1017 ret = get_alpha_info_pal8(src, width, height);
1020 /* we do not know, so everything is indicated */
1021 ret = FF_ALPHA_TRANSP | FF_ALPHA_SEMI_TRANSP;
1027 #if !(HAVE_MMX && HAVE_YASM)
1028 /* filter parameters: [-1 4 2 4 -1] // 8 */
1029 static void deinterlace_line_c(uint8_t *dst,
1030 const uint8_t *lum_m4, const uint8_t *lum_m3,
1031 const uint8_t *lum_m2, const uint8_t *lum_m1,
1035 uint8_t *cm = ff_cropTbl + MAX_NEG_CROP;
1038 for(;size > 0;size--) {
1040 sum += lum_m3[0] << 2;
1041 sum += lum_m2[0] << 1;
1042 sum += lum_m1[0] << 2;
1044 dst[0] = cm[(sum + 4) >> 3];
1054 static void deinterlace_line_inplace_c(uint8_t *lum_m4, uint8_t *lum_m3,
1055 uint8_t *lum_m2, uint8_t *lum_m1,
1056 uint8_t *lum, int size)
1058 uint8_t *cm = ff_cropTbl + MAX_NEG_CROP;
1061 for(;size > 0;size--) {
1063 sum += lum_m3[0] << 2;
1064 sum += lum_m2[0] << 1;
1065 lum_m4[0]=lum_m2[0];
1066 sum += lum_m1[0] << 2;
1068 lum_m2[0] = cm[(sum + 4) >> 3];
1078 /* deinterlacing : 2 temporal taps, 3 spatial taps linear filter. The
1079 top field is copied as is, but the bottom field is deinterlaced
1080 against the top field. */
1081 static void deinterlace_bottom_field(uint8_t *dst, int dst_wrap,
1082 const uint8_t *src1, int src_wrap,
1083 int width, int height)
1085 const uint8_t *src_m2, *src_m1, *src_0, *src_p1, *src_p2;
1090 src_0=&src_m1[src_wrap];
1091 src_p1=&src_0[src_wrap];
1092 src_p2=&src_p1[src_wrap];
1093 for(y=0;y<(height-2);y+=2) {
1094 memcpy(dst,src_m1,width);
1096 deinterlace_line(dst,src_m2,src_m1,src_0,src_p1,src_p2,width);
1100 src_p1 += 2*src_wrap;
1101 src_p2 += 2*src_wrap;
1104 memcpy(dst,src_m1,width);
1107 deinterlace_line(dst,src_m2,src_m1,src_0,src_0,src_0,width);
1110 static void deinterlace_bottom_field_inplace(uint8_t *src1, int src_wrap,
1111 int width, int height)
1113 uint8_t *src_m1, *src_0, *src_p1, *src_p2;
1116 buf = (uint8_t*)av_malloc(width);
1119 memcpy(buf,src_m1,width);
1120 src_0=&src_m1[src_wrap];
1121 src_p1=&src_0[src_wrap];
1122 src_p2=&src_p1[src_wrap];
1123 for(y=0;y<(height-2);y+=2) {
1124 deinterlace_line_inplace(buf,src_m1,src_0,src_p1,src_p2,width);
1127 src_p1 += 2*src_wrap;
1128 src_p2 += 2*src_wrap;
1131 deinterlace_line_inplace(buf,src_m1,src_0,src_0,src_0,width);
1135 int avpicture_deinterlace(AVPicture *dst, const AVPicture *src,
1136 enum PixelFormat pix_fmt, int width, int height)
1140 if (pix_fmt != PIX_FMT_YUV420P &&
1141 pix_fmt != PIX_FMT_YUVJ420P &&
1142 pix_fmt != PIX_FMT_YUV422P &&
1143 pix_fmt != PIX_FMT_YUVJ422P &&
1144 pix_fmt != PIX_FMT_YUV444P &&
1145 pix_fmt != PIX_FMT_YUV411P &&
1146 pix_fmt != PIX_FMT_GRAY8)
1148 if ((width & 3) != 0 || (height & 3) != 0)
1154 case PIX_FMT_YUVJ420P:
1155 case PIX_FMT_YUV420P:
1159 case PIX_FMT_YUV422P:
1160 case PIX_FMT_YUVJ422P:
1163 case PIX_FMT_YUV411P:
1169 if (pix_fmt == PIX_FMT_GRAY8) {
1174 deinterlace_bottom_field_inplace(dst->data[i], dst->linesize[i],
1177 deinterlace_bottom_field(dst->data[i],dst->linesize[i],
1178 src->data[i], src->linesize[i],