Do not include log.h in avutil.h
[libav.git] / libavutil / imgutils.c
1 /*
2 * This file is part of Libav.
3 *
4 * Libav is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU Lesser General Public
6 * License as published by the Free Software Foundation; either
7 * version 2.1 of the License, or (at your option) any later version.
8 *
9 * Libav is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * Lesser General Public License for more details.
13 *
14 * You should have received a copy of the GNU Lesser General Public
15 * License along with Libav; if not, write to the Free Software
16 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
17 */
18
19 /**
20 * @file
21 * misc image utilities
22 */
23
24 #include "imgutils.h"
25 #include "internal.h"
26 #include "log.h"
27 #include "pixdesc.h"
28
29 void av_image_fill_max_pixsteps(int max_pixsteps[4], int max_pixstep_comps[4],
30 const AVPixFmtDescriptor *pixdesc)
31 {
32 int i;
33 memset(max_pixsteps, 0, 4*sizeof(max_pixsteps[0]));
34 if (max_pixstep_comps)
35 memset(max_pixstep_comps, 0, 4*sizeof(max_pixstep_comps[0]));
36
37 for (i = 0; i < 4; i++) {
38 const AVComponentDescriptor *comp = &(pixdesc->comp[i]);
39 if ((comp->step_minus1+1) > max_pixsteps[comp->plane]) {
40 max_pixsteps[comp->plane] = comp->step_minus1+1;
41 if (max_pixstep_comps)
42 max_pixstep_comps[comp->plane] = i;
43 }
44 }
45 }
46
47 int av_image_get_linesize(enum PixelFormat pix_fmt, int width, int plane)
48 {
49 const AVPixFmtDescriptor *desc = &av_pix_fmt_descriptors[pix_fmt];
50 int max_step [4]; /* max pixel step for each plane */
51 int max_step_comp[4]; /* the component for each plane which has the max pixel step */
52 int s;
53
54 if (desc->flags & PIX_FMT_BITSTREAM)
55 return (width * (desc->comp[0].step_minus1+1) + 7) >> 3;
56
57 av_image_fill_max_pixsteps(max_step, max_step_comp, desc);
58 s = (max_step_comp[plane] == 1 || max_step_comp[plane] == 2) ? desc->log2_chroma_w : 0;
59 return max_step[plane] * (((width + (1 << s) - 1)) >> s);
60 }
61
62 int av_image_fill_linesizes(int linesizes[4], enum PixelFormat pix_fmt, int width)
63 {
64 int i;
65 const AVPixFmtDescriptor *desc = &av_pix_fmt_descriptors[pix_fmt];
66 int max_step [4]; /* max pixel step for each plane */
67 int max_step_comp[4]; /* the component for each plane which has the max pixel step */
68
69 memset(linesizes, 0, 4*sizeof(linesizes[0]));
70
71 if ((unsigned)pix_fmt >= PIX_FMT_NB || desc->flags & PIX_FMT_HWACCEL)
72 return AVERROR(EINVAL);
73
74 if (desc->flags & PIX_FMT_BITSTREAM) {
75 if (width > (INT_MAX -7) / (desc->comp[0].step_minus1+1))
76 return AVERROR(EINVAL);
77 linesizes[0] = (width * (desc->comp[0].step_minus1+1) + 7) >> 3;
78 return 0;
79 }
80
81 av_image_fill_max_pixsteps(max_step, max_step_comp, desc);
82 for (i = 0; i < 4; i++) {
83 int s = (max_step_comp[i] == 1 || max_step_comp[i] == 2) ? desc->log2_chroma_w : 0;
84 int shifted_w = ((width + (1 << s) - 1)) >> s;
85 if (max_step[i] > INT_MAX / shifted_w)
86 return AVERROR(EINVAL);
87 linesizes[i] = max_step[i] * shifted_w;
88 }
89
90 return 0;
91 }
92
93 int av_image_fill_pointers(uint8_t *data[4], enum PixelFormat pix_fmt, int height,
94 uint8_t *ptr, const int linesizes[4])
95 {
96 int i, total_size, size[4], has_plane[4];
97
98 const AVPixFmtDescriptor *desc = &av_pix_fmt_descriptors[pix_fmt];
99 memset(data , 0, sizeof(data[0])*4);
100 memset(size , 0, sizeof(size));
101 memset(has_plane, 0, sizeof(has_plane));
102
103 if ((unsigned)pix_fmt >= PIX_FMT_NB || desc->flags & PIX_FMT_HWACCEL)
104 return AVERROR(EINVAL);
105
106 data[0] = ptr;
107 if (linesizes[0] > (INT_MAX - 1024) / height)
108 return AVERROR(EINVAL);
109 size[0] = linesizes[0] * height;
110
111 if (desc->flags & PIX_FMT_PAL) {
112 size[0] = (size[0] + 3) & ~3;
113 data[1] = ptr + size[0]; /* palette is stored here as 256 32 bits words */
114 return size[0] + 256 * 4;
115 }
116
117 for (i = 0; i < 4; i++)
118 has_plane[desc->comp[i].plane] = 1;
119
120 total_size = size[0];
121 for (i = 1; has_plane[i] && i < 4; i++) {
122 int h, s = (i == 1 || i == 2) ? desc->log2_chroma_h : 0;
123 data[i] = data[i-1] + size[i-1];
124 h = (height + (1 << s) - 1) >> s;
125 if (linesizes[i] > INT_MAX / h)
126 return AVERROR(EINVAL);
127 size[i] = h * linesizes[i];
128 if (total_size > INT_MAX - size[i])
129 return AVERROR(EINVAL);
130 total_size += size[i];
131 }
132
133 return total_size;
134 }
135
136 int ff_set_systematic_pal2(uint32_t pal[256], enum PixelFormat pix_fmt)
137 {
138 int i;
139
140 for (i = 0; i < 256; i++) {
141 int r, g, b;
142
143 switch (pix_fmt) {
144 case PIX_FMT_RGB8:
145 r = (i>>5 )*36;
146 g = ((i>>2)&7)*36;
147 b = (i&3 )*85;
148 break;
149 case PIX_FMT_BGR8:
150 b = (i>>6 )*85;
151 g = ((i>>3)&7)*36;
152 r = (i&7 )*36;
153 break;
154 case PIX_FMT_RGB4_BYTE:
155 r = (i>>3 )*255;
156 g = ((i>>1)&3)*85;
157 b = (i&1 )*255;
158 break;
159 case PIX_FMT_BGR4_BYTE:
160 b = (i>>3 )*255;
161 g = ((i>>1)&3)*85;
162 r = (i&1 )*255;
163 break;
164 case PIX_FMT_GRAY8:
165 r = b = g = i;
166 break;
167 default:
168 return AVERROR(EINVAL);
169 }
170 pal[i] = b + (g<<8) + (r<<16);
171 }
172
173 return 0;
174 }
175
176 int av_image_alloc(uint8_t *pointers[4], int linesizes[4],
177 int w, int h, enum PixelFormat pix_fmt, int align)
178 {
179 int i, ret;
180 uint8_t *buf;
181
182 if ((ret = av_image_check_size(w, h, 0, NULL)) < 0)
183 return ret;
184 if ((ret = av_image_fill_linesizes(linesizes, pix_fmt, w)) < 0)
185 return ret;
186
187 for (i = 0; i < 4; i++)
188 linesizes[i] = FFALIGN(linesizes[i], align);
189
190 if ((ret = av_image_fill_pointers(pointers, pix_fmt, h, NULL, linesizes)) < 0)
191 return ret;
192 buf = av_malloc(ret + align);
193 if (!buf)
194 return AVERROR(ENOMEM);
195 if ((ret = av_image_fill_pointers(pointers, pix_fmt, h, buf, linesizes)) < 0) {
196 av_free(buf);
197 return ret;
198 }
199 if (av_pix_fmt_descriptors[pix_fmt].flags & PIX_FMT_PAL)
200 ff_set_systematic_pal2((uint32_t*)pointers[1], pix_fmt);
201
202 return ret;
203 }
204
205 typedef struct ImgUtils {
206 const AVClass *class;
207 int log_offset;
208 void *log_ctx;
209 } ImgUtils;
210
211 static const AVClass imgutils_class = { "IMGUTILS", av_default_item_name, NULL, LIBAVUTIL_VERSION_INT, offsetof(ImgUtils, log_offset), offsetof(ImgUtils, log_ctx) };
212
213 int av_image_check_size(unsigned int w, unsigned int h, int log_offset, void *log_ctx)
214 {
215 ImgUtils imgutils = { &imgutils_class, log_offset, log_ctx };
216
217 if ((int)w>0 && (int)h>0 && (w+128)*(uint64_t)(h+128) < INT_MAX/8)
218 return 0;
219
220 av_log(&imgutils, AV_LOG_ERROR, "Picture size %ux%u is invalid\n", w, h);
221 return AVERROR(EINVAL);
222 }
223
224 void av_image_copy_plane(uint8_t *dst, int dst_linesize,
225 const uint8_t *src, int src_linesize,
226 int bytewidth, int height)
227 {
228 if (!dst || !src)
229 return;
230 for (;height > 0; height--) {
231 memcpy(dst, src, bytewidth);
232 dst += dst_linesize;
233 src += src_linesize;
234 }
235 }
236
237 void av_image_copy(uint8_t *dst_data[4], int dst_linesizes[4],
238 const uint8_t *src_data[4], const int src_linesizes[4],
239 enum PixelFormat pix_fmt, int width, int height)
240 {
241 const AVPixFmtDescriptor *desc = &av_pix_fmt_descriptors[pix_fmt];
242
243 if (desc->flags & PIX_FMT_HWACCEL)
244 return;
245
246 if (desc->flags & PIX_FMT_PAL) {
247 av_image_copy_plane(dst_data[0], dst_linesizes[0],
248 src_data[0], src_linesizes[0],
249 width, height);
250 /* copy the palette */
251 memcpy(dst_data[1], src_data[1], 4*256);
252 } else {
253 int i, planes_nb = 0;
254
255 for (i = 0; i < desc->nb_components; i++)
256 planes_nb = FFMAX(planes_nb, desc->comp[i].plane + 1);
257
258 for (i = 0; i < planes_nb; i++) {
259 int h = height;
260 int bwidth = av_image_get_linesize(pix_fmt, width, i);
261 if (i == 1 || i == 2) {
262 h= -((-height)>>desc->log2_chroma_h);
263 }
264 av_image_copy_plane(dst_data[i], dst_linesizes[i],
265 src_data[i], src_linesizes[i],
266 bwidth, h);
267 }
268 }
269 }