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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 4349 | Serge | 1 | /* |
| 2 | * This file is part of FFmpeg. |
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| 3 | * |
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| 4 | * FFmpeg is free software; you can redistribute it and/or |
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| 5 | * modify it under the terms of the GNU Lesser General Public |
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| 6 | * License as published by the Free Software Foundation; either |
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| 7 | * version 2.1 of the License, or (at your option) any later version. |
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| 8 | * |
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| 9 | * FFmpeg is distributed in the hope that it will be useful, |
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| 10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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| 12 | * Lesser General Public License for more details. |
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| 13 | * |
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| 14 | * You should have received a copy of the GNU Lesser General Public |
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| 15 | * License along with FFmpeg; if not, write to the Free Software |
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| 16 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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| 17 | */ |
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| 18 | |||
| 19 | /** |
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| 20 | * @file |
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| 21 | * misc image utilities |
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| 22 | */ |
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| 23 | |||
| 24 | #include "avassert.h" |
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| 25 | #include "common.h" |
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| 26 | #include "imgutils.h" |
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| 27 | #include "internal.h" |
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| 28 | #include "intreadwrite.h" |
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| 29 | #include "log.h" |
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| 30 | #include "pixdesc.h" |
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| 31 | |||
| 32 | void av_image_fill_max_pixsteps(int max_pixsteps[4], int max_pixstep_comps[4], |
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| 33 | const AVPixFmtDescriptor *pixdesc) |
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| 34 | { |
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| 35 | int i; |
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| 36 | memset(max_pixsteps, 0, 4*sizeof(max_pixsteps[0])); |
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| 37 | if (max_pixstep_comps) |
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| 38 | memset(max_pixstep_comps, 0, 4*sizeof(max_pixstep_comps[0])); |
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| 39 | |||
| 40 | for (i = 0; i < 4; i++) { |
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| 41 | const AVComponentDescriptor *comp = &(pixdesc->comp[i]); |
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| 42 | if ((comp->step_minus1+1) > max_pixsteps[comp->plane]) { |
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| 43 | max_pixsteps[comp->plane] = comp->step_minus1+1; |
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| 44 | if (max_pixstep_comps) |
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| 45 | max_pixstep_comps[comp->plane] = i; |
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| 46 | } |
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| 47 | } |
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| 48 | } |
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| 49 | |||
| 50 | static inline |
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| 51 | int image_get_linesize(int width, int plane, |
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| 52 | int max_step, int max_step_comp, |
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| 53 | const AVPixFmtDescriptor *desc) |
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| 54 | { |
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| 55 | int s, shifted_w, linesize; |
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| 56 | |||
| 57 | if (!desc) |
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| 58 | return AVERROR(EINVAL); |
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| 59 | |||
| 60 | if (width < 0) |
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| 61 | return AVERROR(EINVAL); |
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| 62 | s = (max_step_comp == 1 || max_step_comp == 2) ? desc->log2_chroma_w : 0; |
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| 63 | shifted_w = ((width + (1 << s) - 1)) >> s; |
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| 64 | if (shifted_w && max_step > INT_MAX / shifted_w) |
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| 65 | return AVERROR(EINVAL); |
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| 66 | linesize = max_step * shifted_w; |
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| 67 | |||
| 68 | if (desc->flags & AV_PIX_FMT_FLAG_BITSTREAM) |
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| 69 | linesize = (linesize + 7) >> 3; |
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| 70 | return linesize; |
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| 71 | } |
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| 72 | |||
| 73 | int av_image_get_linesize(enum AVPixelFormat pix_fmt, int width, int plane) |
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| 74 | { |
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| 75 | const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(pix_fmt); |
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| 76 | int max_step [4]; /* max pixel step for each plane */ |
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| 77 | int max_step_comp[4]; /* the component for each plane which has the max pixel step */ |
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| 78 | |||
| 79 | if ((unsigned)pix_fmt >= AV_PIX_FMT_NB || desc->flags & AV_PIX_FMT_FLAG_HWACCEL) |
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| 80 | return AVERROR(EINVAL); |
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| 81 | |||
| 82 | av_image_fill_max_pixsteps(max_step, max_step_comp, desc); |
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| 83 | return image_get_linesize(width, plane, max_step[plane], max_step_comp[plane], desc); |
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| 84 | } |
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| 85 | |||
| 86 | int av_image_fill_linesizes(int linesizes[4], enum AVPixelFormat pix_fmt, int width) |
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| 87 | { |
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| 88 | int i, ret; |
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| 89 | const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(pix_fmt); |
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| 90 | int max_step [4]; /* max pixel step for each plane */ |
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| 91 | int max_step_comp[4]; /* the component for each plane which has the max pixel step */ |
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| 92 | |||
| 93 | memset(linesizes, 0, 4*sizeof(linesizes[0])); |
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| 94 | |||
| 95 | if (!desc || desc->flags & AV_PIX_FMT_FLAG_HWACCEL) |
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| 96 | return AVERROR(EINVAL); |
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| 97 | |||
| 98 | av_image_fill_max_pixsteps(max_step, max_step_comp, desc); |
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| 99 | for (i = 0; i < 4; i++) { |
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| 100 | if ((ret = image_get_linesize(width, i, max_step[i], max_step_comp[i], desc)) < 0) |
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| 101 | return ret; |
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| 102 | linesizes[i] = ret; |
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| 103 | } |
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| 104 | |||
| 105 | return 0; |
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| 106 | } |
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| 107 | |||
| 108 | int av_image_fill_pointers(uint8_t *data[4], enum AVPixelFormat pix_fmt, int height, |
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| 109 | uint8_t *ptr, const int linesizes[4]) |
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| 110 | { |
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| 111 | int i, total_size, size[4] = { 0 }, has_plane[4] = { 0 }; |
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| 112 | |||
| 113 | const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(pix_fmt); |
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| 114 | memset(data , 0, sizeof(data[0])*4); |
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| 115 | |||
| 116 | if (!desc || desc->flags & AV_PIX_FMT_FLAG_HWACCEL) |
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| 117 | return AVERROR(EINVAL); |
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| 118 | |||
| 119 | data[0] = ptr; |
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| 120 | if (linesizes[0] > (INT_MAX - 1024) / height) |
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| 121 | return AVERROR(EINVAL); |
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| 122 | size[0] = linesizes[0] * height; |
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| 123 | |||
| 124 | if (desc->flags & AV_PIX_FMT_FLAG_PAL || |
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| 125 | desc->flags & AV_PIX_FMT_FLAG_PSEUDOPAL) { |
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| 126 | size[0] = (size[0] + 3) & ~3; |
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| 127 | data[1] = ptr + size[0]; /* palette is stored here as 256 32 bits words */ |
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| 128 | return size[0] + 256 * 4; |
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| 129 | } |
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| 130 | |||
| 131 | for (i = 0; i < 4; i++) |
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| 132 | has_plane[desc->comp[i].plane] = 1; |
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| 133 | |||
| 134 | total_size = size[0]; |
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| 135 | for (i = 1; i < 4 && has_plane[i]; i++) { |
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| 136 | int h, s = (i == 1 || i == 2) ? desc->log2_chroma_h : 0; |
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| 137 | data[i] = data[i-1] + size[i-1]; |
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| 138 | h = (height + (1 << s) - 1) >> s; |
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| 139 | if (linesizes[i] > INT_MAX / h) |
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| 140 | return AVERROR(EINVAL); |
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| 141 | size[i] = h * linesizes[i]; |
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| 142 | if (total_size > INT_MAX - size[i]) |
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| 143 | return AVERROR(EINVAL); |
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| 144 | total_size += size[i]; |
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| 145 | } |
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| 146 | |||
| 147 | return total_size; |
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| 148 | } |
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| 149 | |||
| 150 | int avpriv_set_systematic_pal2(uint32_t pal[256], enum AVPixelFormat pix_fmt) |
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| 151 | { |
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| 152 | int i; |
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| 153 | |||
| 154 | for (i = 0; i < 256; i++) { |
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| 155 | int r, g, b; |
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| 156 | |||
| 157 | switch (pix_fmt) { |
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| 158 | case AV_PIX_FMT_RGB8: |
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| 159 | r = (i>>5 )*36; |
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| 160 | g = ((i>>2)&7)*36; |
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| 161 | b = (i&3 )*85; |
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| 162 | break; |
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| 163 | case AV_PIX_FMT_BGR8: |
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| 164 | b = (i>>6 )*85; |
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| 165 | g = ((i>>3)&7)*36; |
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| 166 | r = (i&7 )*36; |
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| 167 | break; |
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| 168 | case AV_PIX_FMT_RGB4_BYTE: |
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| 169 | r = (i>>3 )*255; |
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| 170 | g = ((i>>1)&3)*85; |
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| 171 | b = (i&1 )*255; |
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| 172 | break; |
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| 173 | case AV_PIX_FMT_BGR4_BYTE: |
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| 174 | b = (i>>3 )*255; |
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| 175 | g = ((i>>1)&3)*85; |
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| 176 | r = (i&1 )*255; |
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| 177 | break; |
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| 178 | case AV_PIX_FMT_GRAY8: |
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| 179 | r = b = g = i; |
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| 180 | break; |
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| 181 | default: |
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| 182 | return AVERROR(EINVAL); |
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| 183 | } |
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| 184 | pal[i] = b + (g<<8) + (r<<16) + (0xFFU<<24); |
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| 185 | } |
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| 186 | |||
| 187 | return 0; |
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| 188 | } |
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| 189 | |||
| 190 | int av_image_alloc(uint8_t *pointers[4], int linesizes[4], |
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| 191 | int w, int h, enum AVPixelFormat pix_fmt, int align) |
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| 192 | { |
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| 193 | const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(pix_fmt); |
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| 194 | int i, ret; |
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| 195 | uint8_t *buf; |
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| 196 | |||
| 197 | if (!desc) |
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| 198 | return AVERROR(EINVAL); |
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| 199 | |||
| 200 | if ((ret = av_image_check_size(w, h, 0, NULL)) < 0) |
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| 201 | return ret; |
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| 202 | if ((ret = av_image_fill_linesizes(linesizes, pix_fmt, align>7 ? FFALIGN(w, 8) : w)) < 0) |
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| 203 | return ret; |
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| 204 | |||
| 205 | for (i = 0; i < 4; i++) |
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| 206 | linesizes[i] = FFALIGN(linesizes[i], align); |
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| 207 | |||
| 208 | if ((ret = av_image_fill_pointers(pointers, pix_fmt, h, NULL, linesizes)) < 0) |
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| 209 | return ret; |
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| 210 | buf = av_malloc(ret + align); |
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| 211 | if (!buf) |
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| 212 | return AVERROR(ENOMEM); |
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| 213 | if ((ret = av_image_fill_pointers(pointers, pix_fmt, h, buf, linesizes)) < 0) { |
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| 214 | av_free(buf); |
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| 215 | return ret; |
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| 216 | } |
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| 217 | if (desc->flags & AV_PIX_FMT_FLAG_PAL || desc->flags & AV_PIX_FMT_FLAG_PSEUDOPAL) |
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| 218 | avpriv_set_systematic_pal2((uint32_t*)pointers[1], pix_fmt); |
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| 219 | |||
| 220 | return ret; |
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| 221 | } |
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| 222 | |||
| 223 | typedef struct ImgUtils { |
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| 224 | const AVClass *class; |
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| 225 | int log_offset; |
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| 226 | void *log_ctx; |
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| 227 | } ImgUtils; |
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| 228 | |||
| 229 | static const AVClass imgutils_class = { "IMGUTILS", av_default_item_name, NULL, LIBAVUTIL_VERSION_INT, offsetof(ImgUtils, log_offset), offsetof(ImgUtils, log_ctx) }; |
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| 230 | |||
| 231 | int av_image_check_size(unsigned int w, unsigned int h, int log_offset, void *log_ctx) |
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| 232 | { |
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| 233 | ImgUtils imgutils = { &imgutils_class, log_offset, log_ctx }; |
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| 234 | |||
| 235 | if ((int)w>0 && (int)h>0 && (w+128)*(uint64_t)(h+128) < INT_MAX/8) |
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| 236 | return 0; |
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| 237 | |||
| 238 | av_log(&imgutils, AV_LOG_ERROR, "Picture size %ux%u is invalid\n", w, h); |
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| 239 | return AVERROR(EINVAL); |
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| 240 | } |
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| 241 | |||
| 242 | void av_image_copy_plane(uint8_t *dst, int dst_linesize, |
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| 243 | const uint8_t *src, int src_linesize, |
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| 244 | int bytewidth, int height) |
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| 245 | { |
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| 246 | if (!dst || !src) |
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| 247 | return; |
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| 248 | av_assert0(abs(src_linesize) >= bytewidth); |
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| 249 | av_assert0(abs(dst_linesize) >= bytewidth); |
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| 250 | for (;height > 0; height--) { |
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| 251 | memcpy(dst, src, bytewidth); |
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| 252 | dst += dst_linesize; |
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| 253 | src += src_linesize; |
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| 254 | } |
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| 255 | } |
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| 256 | |||
| 257 | void av_image_copy(uint8_t *dst_data[4], int dst_linesizes[4], |
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| 258 | const uint8_t *src_data[4], const int src_linesizes[4], |
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| 259 | enum AVPixelFormat pix_fmt, int width, int height) |
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| 260 | { |
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| 261 | const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(pix_fmt); |
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| 262 | |||
| 263 | if (!desc || desc->flags & AV_PIX_FMT_FLAG_HWACCEL) |
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| 264 | return; |
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| 265 | |||
| 266 | if (desc->flags & AV_PIX_FMT_FLAG_PAL || |
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| 267 | desc->flags & AV_PIX_FMT_FLAG_PSEUDOPAL) { |
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| 268 | av_image_copy_plane(dst_data[0], dst_linesizes[0], |
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| 269 | src_data[0], src_linesizes[0], |
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| 270 | width, height); |
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| 271 | /* copy the palette */ |
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| 272 | memcpy(dst_data[1], src_data[1], 4*256); |
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| 273 | } else { |
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| 274 | int i, planes_nb = 0; |
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| 275 | |||
| 276 | for (i = 0; i < desc->nb_components; i++) |
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| 277 | planes_nb = FFMAX(planes_nb, desc->comp[i].plane + 1); |
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| 278 | |||
| 279 | for (i = 0; i < planes_nb; i++) { |
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| 280 | int h = height; |
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| 281 | int bwidth = av_image_get_linesize(pix_fmt, width, i); |
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| 282 | if (bwidth < 0) { |
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| 283 | av_log(NULL, AV_LOG_ERROR, "av_image_get_linesize failed\n"); |
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| 284 | return; |
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| 285 | } |
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| 286 | if (i == 1 || i == 2) { |
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| 287 | h = FF_CEIL_RSHIFT(height, desc->log2_chroma_h); |
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| 288 | } |
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| 289 | av_image_copy_plane(dst_data[i], dst_linesizes[i], |
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| 290 | src_data[i], src_linesizes[i], |
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| 291 | bwidth, h); |
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| 292 | } |
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| 293 | } |
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| 294 | } |
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| 295 | |||
| 296 | int av_image_fill_arrays(uint8_t *dst_data[4], int dst_linesize[4], |
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| 297 | const uint8_t *src, |
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| 298 | enum AVPixelFormat pix_fmt, int width, int height, int align) |
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| 299 | { |
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| 300 | int ret, i; |
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| 301 | |||
| 302 | if ((ret = av_image_check_size(width, height, 0, NULL)) < 0) |
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| 303 | return ret; |
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| 304 | |||
| 305 | if ((ret = av_image_fill_linesizes(dst_linesize, pix_fmt, width)) < 0) |
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| 306 | return ret; |
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| 307 | |||
| 308 | for (i = 0; i < 4; i++) |
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| 309 | dst_linesize[i] = FFALIGN(dst_linesize[i], align); |
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| 310 | |||
| 311 | if ((ret = av_image_fill_pointers(dst_data, pix_fmt, width, NULL, dst_linesize)) < 0) |
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| 312 | return ret; |
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| 313 | |||
| 314 | return av_image_fill_pointers(dst_data, pix_fmt, height, (uint8_t *)src, dst_linesize); |
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| 315 | } |
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| 316 | |||
| 317 | int av_image_get_buffer_size(enum AVPixelFormat pix_fmt, int width, int height, int align) |
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| 318 | { |
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| 319 | const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(pix_fmt); |
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| 320 | uint8_t *data[4]; |
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| 321 | int linesize[4]; |
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| 322 | |||
| 323 | if (!desc) |
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| 324 | return AVERROR(EINVAL); |
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| 325 | if (av_image_check_size(width, height, 0, NULL) < 0) |
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| 326 | return AVERROR(EINVAL); |
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| 327 | if (desc->flags & AV_PIX_FMT_FLAG_PSEUDOPAL) |
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| 328 | // do not include palette for these pseudo-paletted formats |
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| 329 | return width * height; |
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| 330 | return av_image_fill_arrays(data, linesize, NULL, pix_fmt, width, height, align); |
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| 331 | } |
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| 332 | |||
| 333 | int av_image_copy_to_buffer(uint8_t *dst, int dst_size, |
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| 334 | const uint8_t * const src_data[4], const int src_linesize[4], |
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| 335 | enum AVPixelFormat pix_fmt, int width, int height, int align) |
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| 336 | { |
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| 337 | int i, j, nb_planes = 0, linesize[4]; |
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| 338 | const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(pix_fmt); |
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| 339 | int size = av_image_get_buffer_size(pix_fmt, width, height, align); |
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| 340 | |||
| 341 | if (size > dst_size || size < 0) |
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| 342 | return AVERROR(EINVAL); |
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| 343 | |||
| 344 | for (i = 0; i < desc->nb_components; i++) |
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| 345 | nb_planes = FFMAX(desc->comp[i].plane, nb_planes); |
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| 346 | nb_planes++; |
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| 347 | |||
| 348 | av_image_fill_linesizes(linesize, pix_fmt, width); |
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| 349 | for (i = 0; i < nb_planes; i++) { |
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| 350 | int h, shift = (i == 1 || i == 2) ? desc->log2_chroma_h : 0; |
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| 351 | const uint8_t *src = src_data[i]; |
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| 352 | h = (height + (1 << shift) - 1) >> shift; |
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| 353 | |||
| 354 | for (j = 0; j < h; j++) { |
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| 355 | memcpy(dst, src, linesize[i]); |
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| 356 | dst += FFALIGN(linesize[i], align); |
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| 357 | src += src_linesize[i]; |
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| 358 | } |
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| 359 | } |
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| 360 | |||
| 361 | if (desc->flags & AV_PIX_FMT_FLAG_PAL) { |
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| 362 | uint32_t *d32 = (uint32_t *)(((size_t)dst + 3) & ~3); |
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| 363 | for (i = 0; i<256; i++) |
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| 364 | AV_WL32(d32 + i, AV_RN32(src_data[1] + 4*i)); |
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| 365 | } |
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| 366 | |||
| 367 | return size; |
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| 368 | } |