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
30 #include "libavutil/colorspace.h"
31 #include "libavutil/common.h"
32 #include "libavutil/pixdesc.h"
33 #include "libavutil/internal.h"
34 #include "libavutil/imgutils.h"
36 #if FF_API_AVCODEC_PIX_FMT
37 int avcodec_get_pix_fmt_loss(enum AVPixelFormat dst_pix_fmt,
38 enum AVPixelFormat src_pix_fmt,
41 return av_get_pix_fmt_loss(dst_pix_fmt, src_pix_fmt, has_alpha);
44 enum AVPixelFormat avcodec_find_best_pix_fmt_of_2(enum AVPixelFormat dst_pix_fmt1, enum AVPixelFormat dst_pix_fmt2,
45 enum AVPixelFormat src_pix_fmt, int has_alpha, int *loss_ptr)
47 return av_find_best_pix_fmt_of_2(dst_pix_fmt1, dst_pix_fmt2, src_pix_fmt, has_alpha, loss_ptr);
50 enum AVPixelFormat avcodec_find_best_pix_fmt2(enum AVPixelFormat dst_pix_fmt1, enum AVPixelFormat dst_pix_fmt2,
51 enum AVPixelFormat src_pix_fmt, int has_alpha, int *loss_ptr)
53 return av_find_best_pix_fmt_of_2(dst_pix_fmt1, dst_pix_fmt2, src_pix_fmt, has_alpha, loss_ptr);
57 enum AVPixelFormat avcodec_find_best_pix_fmt_of_list(const enum AVPixelFormat *pix_fmt_list,
58 enum AVPixelFormat src_pix_fmt,
59 int has_alpha, int *loss_ptr){
62 enum AVPixelFormat best = AV_PIX_FMT_NONE;
65 for (i=0; pix_fmt_list[i] != AV_PIX_FMT_NONE; i++) {
66 loss = loss_ptr ? *loss_ptr : 0;
67 best = av_find_best_pix_fmt_of_2(best, pix_fmt_list[i], src_pix_fmt, has_alpha, &loss);
76 FF_DISABLE_DEPRECATION_WARNINGS
77 /* return true if yuv planar */
78 static inline int is_yuv_planar(const AVPixFmtDescriptor *desc)
81 int planes[4] = { 0 };
83 if ( desc->flags & AV_PIX_FMT_FLAG_RGB
84 || !(desc->flags & AV_PIX_FMT_FLAG_PLANAR))
87 /* set the used planes */
88 for (i = 0; i < desc->nb_components; i++)
89 planes[desc->comp[i].plane] = 1;
91 /* if there is an unused plane, the format is not planar */
92 for (i = 0; i < desc->nb_components; i++)
98 int av_picture_crop(AVPicture *dst, const AVPicture *src,
99 enum AVPixelFormat pix_fmt, int top_band, int left_band)
101 const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(pix_fmt);
106 if (pix_fmt < 0 || pix_fmt >= AV_PIX_FMT_NB)
109 y_shift = desc->log2_chroma_h;
110 x_shift = desc->log2_chroma_w;
111 av_image_fill_max_pixsteps(max_step, NULL, desc);
113 if (is_yuv_planar(desc)) {
114 dst->data[0] = src->data[0] + (top_band * src->linesize[0]) + left_band;
115 dst->data[1] = src->data[1] + ((top_band >> y_shift) * src->linesize[1]) + (left_band >> x_shift);
116 dst->data[2] = src->data[2] + ((top_band >> y_shift) * src->linesize[2]) + (left_band >> x_shift);
118 if(top_band % (1<<y_shift) || left_band % (1<<x_shift))
120 dst->data[0] = src->data[0] + (top_band * src->linesize[0]) + (left_band * max_step[0]);
123 dst->linesize[0] = src->linesize[0];
124 dst->linesize[1] = src->linesize[1];
125 dst->linesize[2] = src->linesize[2];
129 int av_picture_pad(AVPicture *dst, const AVPicture *src, int height, int width,
130 enum AVPixelFormat pix_fmt, int padtop, int padbottom, int padleft, int padright,
133 const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(pix_fmt);
141 if (pix_fmt < 0 || pix_fmt >= AV_PIX_FMT_NB)
144 if (!is_yuv_planar(desc)) {
146 return -1; //TODO: Not yet implemented
148 av_image_fill_max_pixsteps(max_step, NULL, desc);
150 if (padtop || padleft) {
151 memset(dst->data[0], color[0],
152 dst->linesize[0] * padtop + (padleft * max_step[0]));
155 if (padleft || padright) {
156 optr = dst->data[0] + dst->linesize[0] * padtop +
157 (dst->linesize[0] - (padright * max_step[0]));
158 yheight = height - 1 - (padtop + padbottom);
159 for (y = 0; y < yheight; y++) {
160 memset(optr, color[0], (padleft + padright) * max_step[0]);
161 optr += dst->linesize[0];
165 if (padbottom || padright) {
166 optr = dst->data[0] + dst->linesize[0] * (height - padbottom) -
167 (padright * max_step[0]);
168 memset(optr, color[0], dst->linesize[0] * padbottom +
169 (padright * max_step[0]));
175 for (i = 0; i < 3; i++) {
176 x_shift = i ? desc->log2_chroma_w : 0;
177 y_shift = i ? desc->log2_chroma_h : 0;
179 if (padtop || padleft) {
180 memset(dst->data[i], color[i],
181 dst->linesize[i] * (padtop >> y_shift) + (padleft >> x_shift));
184 if (padleft || padright) {
185 optr = dst->data[i] + dst->linesize[i] * (padtop >> y_shift) +
186 (dst->linesize[i] - (padright >> x_shift));
187 yheight = (height - 1 - (padtop + padbottom)) >> y_shift;
188 for (y = 0; y < yheight; y++) {
189 memset(optr, color[i], (padleft + padright) >> x_shift);
190 optr += dst->linesize[i];
194 if (src) { /* first line */
195 uint8_t *iptr = src->data[i];
196 optr = dst->data[i] + dst->linesize[i] * (padtop >> y_shift) +
197 (padleft >> x_shift);
198 memcpy(optr, iptr, (width - padleft - padright) >> x_shift);
199 iptr += src->linesize[i];
200 optr = dst->data[i] + dst->linesize[i] * (padtop >> y_shift) +
201 (dst->linesize[i] - (padright >> x_shift));
202 yheight = (height - 1 - (padtop + padbottom)) >> y_shift;
203 for (y = 0; y < yheight; y++) {
204 memset(optr, color[i], (padleft + padright) >> x_shift);
205 memcpy(optr + ((padleft + padright) >> x_shift), iptr,
206 (width - padleft - padright) >> x_shift);
207 iptr += src->linesize[i];
208 optr += dst->linesize[i];
212 if (padbottom || padright) {
213 optr = dst->data[i] + dst->linesize[i] *
214 ((height - padbottom) >> y_shift) - (padright >> x_shift);
215 memset(optr, color[i],dst->linesize[i] *
216 (padbottom >> y_shift) + (padright >> x_shift));
222 FF_ENABLE_DEPRECATION_WARNINGS
223 #endif /* FF_API_AVPICTURE */