| Line | Branch | Exec | Source |
|---|---|---|---|
| 1 | /* | ||
| 2 | * PNG image format | ||
| 3 | * Copyright (c) 2003 Fabrice Bellard | ||
| 4 | * | ||
| 5 | * This file is part of FFmpeg. | ||
| 6 | * | ||
| 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. | ||
| 11 | * | ||
| 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. | ||
| 16 | * | ||
| 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 | ||
| 20 | */ | ||
| 21 | |||
| 22 | //#define DEBUG | ||
| 23 | |||
| 24 | #include "config_components.h" | ||
| 25 | |||
| 26 | #include "libavutil/avassert.h" | ||
| 27 | #include "libavutil/bprint.h" | ||
| 28 | #include "libavutil/crc.h" | ||
| 29 | #include "libavutil/csp.h" | ||
| 30 | #include "libavutil/imgutils.h" | ||
| 31 | #include "libavutil/intreadwrite.h" | ||
| 32 | #include "libavutil/mastering_display_metadata.h" | ||
| 33 | #include "libavutil/mem.h" | ||
| 34 | #include "libavutil/pixfmt.h" | ||
| 35 | #include "libavutil/rational.h" | ||
| 36 | #include "libavutil/stereo3d.h" | ||
| 37 | |||
| 38 | #include "avcodec.h" | ||
| 39 | #include "bytestream.h" | ||
| 40 | #include "codec_internal.h" | ||
| 41 | #include "decode.h" | ||
| 42 | #include "apng.h" | ||
| 43 | #include "png.h" | ||
| 44 | #include "pngdsp.h" | ||
| 45 | #include "progressframe.h" | ||
| 46 | #include "thread.h" | ||
| 47 | #include "zlib_wrapper.h" | ||
| 48 | |||
| 49 | #include <zlib.h> | ||
| 50 | |||
| 51 | enum PNGHeaderState { | ||
| 52 | PNG_IHDR = 1 << 0, | ||
| 53 | PNG_PLTE = 1 << 1, | ||
| 54 | }; | ||
| 55 | |||
| 56 | enum PNGImageState { | ||
| 57 | PNG_IDAT = 1 << 0, | ||
| 58 | PNG_ALLIMAGE = 1 << 1, | ||
| 59 | }; | ||
| 60 | |||
| 61 | typedef struct PNGDecContext { | ||
| 62 | PNGDSPContext dsp; | ||
| 63 | AVCodecContext *avctx; | ||
| 64 | |||
| 65 | GetByteContext gb; | ||
| 66 | ProgressFrame last_picture; | ||
| 67 | ProgressFrame picture; | ||
| 68 | |||
| 69 | AVDictionary *frame_metadata; | ||
| 70 | |||
| 71 | uint8_t iccp_name[82]; | ||
| 72 | uint8_t *iccp_data; | ||
| 73 | size_t iccp_data_len; | ||
| 74 | |||
| 75 | int stereo_mode; | ||
| 76 | |||
| 77 | int have_chrm; | ||
| 78 | uint32_t white_point[2]; | ||
| 79 | uint32_t display_primaries[3][2]; | ||
| 80 | int gamma; | ||
| 81 | int have_srgb; | ||
| 82 | int have_cicp; | ||
| 83 | enum AVColorPrimaries cicp_primaries; | ||
| 84 | enum AVColorTransferCharacteristic cicp_trc; | ||
| 85 | enum AVColorRange cicp_range; | ||
| 86 | int have_clli; | ||
| 87 | uint32_t clli_max; | ||
| 88 | uint32_t clli_avg; | ||
| 89 | int have_mdvc; | ||
| 90 | uint16_t mdvc_primaries[3][2]; | ||
| 91 | uint16_t mdvc_white_point[2]; | ||
| 92 | uint32_t mdvc_max_lum; | ||
| 93 | uint32_t mdvc_min_lum; | ||
| 94 | |||
| 95 | enum PNGHeaderState hdr_state; | ||
| 96 | enum PNGImageState pic_state; | ||
| 97 | int width, height; | ||
| 98 | int cur_w, cur_h; | ||
| 99 | int x_offset, y_offset; | ||
| 100 | uint8_t dispose_op, blend_op; | ||
| 101 | int bit_depth; | ||
| 102 | int color_type; | ||
| 103 | int compression_type; | ||
| 104 | int interlace_type; | ||
| 105 | int filter_type; | ||
| 106 | int channels; | ||
| 107 | int bits_per_pixel; | ||
| 108 | int bpp; | ||
| 109 | int has_trns; | ||
| 110 | uint8_t transparent_color_be[6]; | ||
| 111 | int significant_bits; | ||
| 112 | |||
| 113 | uint32_t palette[256]; | ||
| 114 | uint8_t *crow_buf; | ||
| 115 | uint8_t *last_row; | ||
| 116 | unsigned int last_row_size; | ||
| 117 | uint8_t *tmp_row; | ||
| 118 | unsigned int tmp_row_size; | ||
| 119 | uint8_t *buffer; | ||
| 120 | int buffer_size; | ||
| 121 | int pass; | ||
| 122 | int crow_size; /* compressed row size (include filter type) */ | ||
| 123 | int row_size; /* decompressed row size */ | ||
| 124 | int pass_row_size; /* decompress row size of the current pass */ | ||
| 125 | int y; | ||
| 126 | FFZStream zstream; | ||
| 127 | } PNGDecContext; | ||
| 128 | |||
| 129 | /* Mask to determine which pixels are valid in a pass */ | ||
| 130 | static const uint8_t png_pass_mask[NB_PASSES] = { | ||
| 131 | 0x01, 0x01, 0x11, 0x11, 0x55, 0x55, 0xff, | ||
| 132 | }; | ||
| 133 | |||
| 134 | /* Mask to determine which y pixels can be written in a pass */ | ||
| 135 | static const uint8_t png_pass_dsp_ymask[NB_PASSES] = { | ||
| 136 | 0xff, 0xff, 0x0f, 0xff, 0x33, 0xff, 0x55, | ||
| 137 | }; | ||
| 138 | |||
| 139 | /* Mask to determine which pixels to overwrite while displaying */ | ||
| 140 | static const uint8_t png_pass_dsp_mask[NB_PASSES] = { | ||
| 141 | 0xff, 0x0f, 0xff, 0x33, 0xff, 0x55, 0xff | ||
| 142 | }; | ||
| 143 | |||
| 144 | /* NOTE: we try to construct a good looking image at each pass. width | ||
| 145 | * is the original image width. We also do pixel format conversion at | ||
| 146 | * this stage */ | ||
| 147 | 5632 | static void png_put_interlaced_row(uint8_t *dst, int width, | |
| 148 | int bits_per_pixel, int pass, | ||
| 149 | int color_type, const uint8_t *src) | ||
| 150 | { | ||
| 151 | int x, mask, dsp_mask, j, src_x, b, bpp; | ||
| 152 | uint8_t *d; | ||
| 153 | const uint8_t *s; | ||
| 154 | |||
| 155 | 5632 | mask = png_pass_mask[pass]; | |
| 156 | 5632 | dsp_mask = png_pass_dsp_mask[pass]; | |
| 157 | |||
| 158 |
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5632 | switch (bits_per_pixel) { |
| 159 | ✗ | case 1: | |
| 160 | ✗ | src_x = 0; | |
| 161 | ✗ | for (x = 0; x < width; x++) { | |
| 162 | ✗ | j = (x & 7); | |
| 163 | ✗ | if ((dsp_mask << j) & 0x80) { | |
| 164 | ✗ | b = (src[src_x >> 3] >> (7 - (src_x & 7))) & 1; | |
| 165 | ✗ | dst[x >> 3] &= 0xFF7F>>j; | |
| 166 | ✗ | dst[x >> 3] |= b << (7 - j); | |
| 167 | } | ||
| 168 | ✗ | if ((mask << j) & 0x80) | |
| 169 | ✗ | src_x++; | |
| 170 | } | ||
| 171 | ✗ | break; | |
| 172 | ✗ | case 2: | |
| 173 | ✗ | src_x = 0; | |
| 174 | ✗ | for (x = 0; x < width; x++) { | |
| 175 | ✗ | int j2 = 2 * (x & 3); | |
| 176 | ✗ | j = (x & 7); | |
| 177 | ✗ | if ((dsp_mask << j) & 0x80) { | |
| 178 | ✗ | b = (src[src_x >> 2] >> (6 - 2*(src_x & 3))) & 3; | |
| 179 | ✗ | dst[x >> 2] &= 0xFF3F>>j2; | |
| 180 | ✗ | dst[x >> 2] |= b << (6 - j2); | |
| 181 | } | ||
| 182 | ✗ | if ((mask << j) & 0x80) | |
| 183 | ✗ | src_x++; | |
| 184 | } | ||
| 185 | ✗ | break; | |
| 186 | ✗ | case 4: | |
| 187 | ✗ | src_x = 0; | |
| 188 | ✗ | for (x = 0; x < width; x++) { | |
| 189 | ✗ | int j2 = 4*(x&1); | |
| 190 | ✗ | j = (x & 7); | |
| 191 | ✗ | if ((dsp_mask << j) & 0x80) { | |
| 192 | ✗ | b = (src[src_x >> 1] >> (4 - 4*(src_x & 1))) & 15; | |
| 193 | ✗ | dst[x >> 1] &= 0xFF0F>>j2; | |
| 194 | ✗ | dst[x >> 1] |= b << (4 - j2); | |
| 195 | } | ||
| 196 | ✗ | if ((mask << j) & 0x80) | |
| 197 | ✗ | src_x++; | |
| 198 | } | ||
| 199 | ✗ | break; | |
| 200 | 5632 | default: | |
| 201 | 5632 | bpp = bits_per_pixel >> 3; | |
| 202 | 5632 | d = dst; | |
| 203 | 5632 | s = src; | |
| 204 |
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726528 | for (x = 0; x < width; x++) { |
| 205 | 720896 | j = x & 7; | |
| 206 |
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720896 | if ((dsp_mask << j) & 0x80) { |
| 207 | 524288 | memcpy(d, s, bpp); | |
| 208 | } | ||
| 209 | 720896 | d += bpp; | |
| 210 |
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720896 | if ((mask << j) & 0x80) |
| 211 | 245760 | s += bpp; | |
| 212 | } | ||
| 213 | 5632 | break; | |
| 214 | } | ||
| 215 | 5632 | } | |
| 216 | |||
| 217 | 53835 | void ff_add_png_paeth_prediction(uint8_t *dst, uint8_t *src, uint8_t *top, | |
| 218 | int w, int bpp) | ||
| 219 | { | ||
| 220 | int i; | ||
| 221 |
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13029866 | for (i = 0; i < w; i++) { |
| 222 | int a, b, c, p, pa, pb, pc; | ||
| 223 | |||
| 224 | 12976031 | a = dst[i - bpp]; | |
| 225 | 12976031 | b = top[i]; | |
| 226 | 12976031 | c = top[i - bpp]; | |
| 227 | |||
| 228 | 12976031 | p = b - c; | |
| 229 | 12976031 | pc = a - c; | |
| 230 | |||
| 231 | 12976031 | pa = abs(p); | |
| 232 | 12976031 | pb = abs(pc); | |
| 233 | 12976031 | pc = abs(p + pc); | |
| 234 | |||
| 235 |
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12976031 | if (pa <= pb && pa <= pc) |
| 236 | 7423522 | p = a; | |
| 237 |
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5552509 | else if (pb <= pc) |
| 238 | 4532919 | p = b; | |
| 239 | else | ||
| 240 | 1019590 | p = c; | |
| 241 | 12976031 | dst[i] = p + src[i]; | |
| 242 | } | ||
| 243 | 53835 | } | |
| 244 | |||
| 245 | #define UNROLL1(bpp, op) \ | ||
| 246 | { \ | ||
| 247 | r = dst[0]; \ | ||
| 248 | if (bpp >= 2) \ | ||
| 249 | g = dst[1]; \ | ||
| 250 | if (bpp >= 3) \ | ||
| 251 | b = dst[2]; \ | ||
| 252 | if (bpp >= 4) \ | ||
| 253 | a = dst[3]; \ | ||
| 254 | for (; i <= size - bpp; i += bpp) { \ | ||
| 255 | dst[i + 0] = r = op(r, src[i + 0], last[i + 0]); \ | ||
| 256 | if (bpp == 1) \ | ||
| 257 | continue; \ | ||
| 258 | dst[i + 1] = g = op(g, src[i + 1], last[i + 1]); \ | ||
| 259 | if (bpp == 2) \ | ||
| 260 | continue; \ | ||
| 261 | dst[i + 2] = b = op(b, src[i + 2], last[i + 2]); \ | ||
| 262 | if (bpp == 3) \ | ||
| 263 | continue; \ | ||
| 264 | dst[i + 3] = a = op(a, src[i + 3], last[i + 3]); \ | ||
| 265 | } \ | ||
| 266 | } | ||
| 267 | |||
| 268 | #define UNROLL_FILTER(op) \ | ||
| 269 | if (bpp == 1) { \ | ||
| 270 | UNROLL1(1, op) \ | ||
| 271 | } else if (bpp == 2) { \ | ||
| 272 | UNROLL1(2, op) \ | ||
| 273 | } else if (bpp == 3) { \ | ||
| 274 | UNROLL1(3, op) \ | ||
| 275 | } else if (bpp == 4) { \ | ||
| 276 | UNROLL1(4, op) \ | ||
| 277 | } \ | ||
| 278 | for (; i < size; i++) { \ | ||
| 279 | dst[i] = op(dst[i - bpp], src[i], last[i]); \ | ||
| 280 | } | ||
| 281 | |||
| 282 | /* NOTE: 'dst' can be equal to 'last' */ | ||
| 283 | 127488 | void ff_png_filter_row(PNGDSPContext *dsp, uint8_t *dst, int filter_type, | |
| 284 | uint8_t *src, uint8_t *last, int size, int bpp) | ||
| 285 | { | ||
| 286 | int i, p, r, g, b, a; | ||
| 287 | |||
| 288 |
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127488 | switch (filter_type) { |
| 289 | 82172 | case PNG_FILTER_VALUE_NONE: | |
| 290 | 82172 | memcpy(dst, src, size); | |
| 291 | 82172 | break; | |
| 292 | 4447 | case PNG_FILTER_VALUE_SUB: | |
| 293 |
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20473 | for (i = 0; i < bpp; i++) |
| 294 | 16026 | dst[i] = src[i]; | |
| 295 |
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4447 | if (bpp == 4) { |
| 296 | 2655 | p = *(int *)dst; | |
| 297 |
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411180 | for (; i < size; i += bpp) { |
| 298 | 408525 | unsigned s = *(int *)(src + i); | |
| 299 | 408525 | p = ((s & 0x7f7f7f7f) + (p & 0x7f7f7f7f)) ^ ((s ^ p) & 0x80808080); | |
| 300 | 408525 | *(int *)(dst + i) = p; | |
| 301 | } | ||
| 302 | } else { | ||
| 303 | #define OP_SUB(x, s, l) ((x) + (s)) | ||
| 304 |
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335635 | UNROLL_FILTER(OP_SUB); |
| 305 | } | ||
| 306 | 4447 | break; | |
| 307 | 11070 | case PNG_FILTER_VALUE_UP: | |
| 308 | 11070 | dsp->add_bytes_l2(dst, src, last, size); | |
| 309 | 11070 | break; | |
| 310 | 2737 | case PNG_FILTER_VALUE_AVG: | |
| 311 |
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11606 | for (i = 0; i < bpp; i++) { |
| 312 | 8869 | p = (last[i] >> 1); | |
| 313 | 8869 | dst[i] = p + src[i]; | |
| 314 | } | ||
| 315 | #define OP_AVG(x, s, l) (((((x) + (l)) >> 1) + (s)) & 0xff) | ||
| 316 |
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383990 | UNROLL_FILTER(OP_AVG); |
| 317 | 2737 | break; | |
| 318 | 27062 | case PNG_FILTER_VALUE_PAETH: | |
| 319 |
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111229 | for (i = 0; i < bpp; i++) { |
| 320 | 84167 | p = last[i]; | |
| 321 | 84167 | dst[i] = p + src[i]; | |
| 322 | } | ||
| 323 |
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27062 | if (bpp > 2 && size > 4) { |
| 324 | /* would write off the end of the array if we let it process | ||
| 325 | * the last pixel with bpp=3 */ | ||
| 326 |
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26992 | int w = (bpp & 3) ? size - 3 : size; |
| 327 | |||
| 328 |
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26992 | if (w > i) { |
| 329 | 26992 | dsp->add_paeth_prediction(dst + i, src + i, last + i, size - i, bpp); | |
| 330 | 26992 | i = w; | |
| 331 | } | ||
| 332 | } | ||
| 333 | 27062 | ff_add_png_paeth_prediction(dst + i, src + i, last + i, size - i, bpp); | |
| 334 | 27062 | break; | |
| 335 | } | ||
| 336 | 127488 | } | |
| 337 | |||
| 338 | /* This used to be called "deloco" in FFmpeg | ||
| 339 | * and is actually an inverse reversible colorspace transformation */ | ||
| 340 | #define YUV2RGB(NAME, TYPE) \ | ||
| 341 | static void deloco_ ## NAME(TYPE *dst, int size, int alpha) \ | ||
| 342 | { \ | ||
| 343 | int i; \ | ||
| 344 | for (i = 0; i < size - 2; i += 3 + alpha) { \ | ||
| 345 | int g = dst [i + 1]; \ | ||
| 346 | dst[i + 0] += g; \ | ||
| 347 | dst[i + 2] += g; \ | ||
| 348 | } \ | ||
| 349 | } | ||
| 350 | |||
| 351 | ✗ | YUV2RGB(rgb8, uint8_t) | |
| 352 | ✗ | YUV2RGB(rgb16, uint16_t) | |
| 353 | |||
| 354 | 583 | static int percent_missing(PNGDecContext *s) | |
| 355 | { | ||
| 356 |
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583 | if (s->interlace_type) { |
| 357 | 4 | return 100 - 100 * s->pass / (NB_PASSES - 1); | |
| 358 | } else { | ||
| 359 | 579 | return 100 - 100 * s->y / s->cur_h; | |
| 360 | } | ||
| 361 | } | ||
| 362 | |||
| 363 | /* process exactly one decompressed row */ | ||
| 364 | 123247 | static void png_handle_row(PNGDecContext *s, uint8_t *dst, ptrdiff_t dst_stride) | |
| 365 | { | ||
| 366 | uint8_t *ptr, *last_row; | ||
| 367 | int got_line; | ||
| 368 | |||
| 369 |
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123247 | if (!s->interlace_type) { |
| 370 | 121327 | ptr = dst + dst_stride * (s->y + s->y_offset) + s->x_offset * s->bpp; | |
| 371 |
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121327 | if (s->y == 0) |
| 372 | 650 | last_row = s->last_row; | |
| 373 | else | ||
| 374 | 120677 | last_row = ptr - dst_stride; | |
| 375 | |||
| 376 | 121327 | ff_png_filter_row(&s->dsp, ptr, s->crow_buf[0], s->crow_buf + 1, | |
| 377 | last_row, s->row_size, s->bpp); | ||
| 378 | /* loco lags by 1 row so that it doesn't interfere with top prediction */ | ||
| 379 |
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121327 | if (s->filter_type == PNG_FILTER_TYPE_LOCO && s->y > 0) { |
| 380 | ✗ | if (s->bit_depth == 16) { | |
| 381 | ✗ | deloco_rgb16((uint16_t *)(ptr - dst_stride), s->row_size / 2, | |
| 382 | ✗ | s->color_type == PNG_COLOR_TYPE_RGB_ALPHA); | |
| 383 | } else { | ||
| 384 | ✗ | deloco_rgb8(ptr - dst_stride, s->row_size, | |
| 385 | ✗ | s->color_type == PNG_COLOR_TYPE_RGB_ALPHA); | |
| 386 | } | ||
| 387 | } | ||
| 388 | 121327 | s->y++; | |
| 389 |
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121327 | if (s->y == s->cur_h) { |
| 390 | 650 | s->pic_state |= PNG_ALLIMAGE; | |
| 391 |
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650 | if (s->filter_type == PNG_FILTER_TYPE_LOCO) { |
| 392 | ✗ | if (s->bit_depth == 16) { | |
| 393 | ✗ | deloco_rgb16((uint16_t *)ptr, s->row_size / 2, | |
| 394 | ✗ | s->color_type == PNG_COLOR_TYPE_RGB_ALPHA); | |
| 395 | } else { | ||
| 396 | ✗ | deloco_rgb8(ptr, s->row_size, | |
| 397 | ✗ | s->color_type == PNG_COLOR_TYPE_RGB_ALPHA); | |
| 398 | } | ||
| 399 | } | ||
| 400 | } | ||
| 401 | } else { | ||
| 402 | 1920 | got_line = 0; | |
| 403 | for (;;) { | ||
| 404 | 9080 | ptr = dst + dst_stride * (s->y + s->y_offset) + s->x_offset * s->bpp; | |
| 405 |
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9080 | if ((ff_png_pass_ymask[s->pass] << (s->y & 7)) & 0x80) { |
| 406 | /* if we already read one row, it is time to stop to | ||
| 407 | * wait for the next one */ | ||
| 408 |
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3832 | if (got_line) |
| 409 | 1912 | break; | |
| 410 | 1920 | ff_png_filter_row(&s->dsp, s->tmp_row, s->crow_buf[0], s->crow_buf + 1, | |
| 411 | s->last_row, s->pass_row_size, s->bpp); | ||
| 412 | 1920 | FFSWAP(uint8_t *, s->last_row, s->tmp_row); | |
| 413 | 1920 | FFSWAP(unsigned int, s->last_row_size, s->tmp_row_size); | |
| 414 | 1920 | got_line = 1; | |
| 415 | } | ||
| 416 |
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|
7168 | if ((png_pass_dsp_ymask[s->pass] << (s->y & 7)) & 0x80) { |
| 417 | 5632 | png_put_interlaced_row(ptr, s->cur_w, s->bits_per_pixel, s->pass, | |
| 418 | 5632 | s->color_type, s->last_row); | |
| 419 | } | ||
| 420 | 7168 | s->y++; | |
| 421 |
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|
7168 | if (s->y == s->cur_h) { |
| 422 | 56 | memset(s->last_row, 0, s->row_size); | |
| 423 | for (;;) { | ||
| 424 |
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|
56 | if (s->pass == NB_PASSES - 1) { |
| 425 | 8 | s->pic_state |= PNG_ALLIMAGE; | |
| 426 | 8 | goto the_end; | |
| 427 | } else { | ||
| 428 | 48 | s->pass++; | |
| 429 | 48 | s->y = 0; | |
| 430 | 48 | s->pass_row_size = ff_png_pass_row_size(s->pass, | |
| 431 | s->bits_per_pixel, | ||
| 432 | s->cur_w); | ||
| 433 | 48 | s->crow_size = s->pass_row_size + 1; | |
| 434 |
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|
48 | if (s->pass_row_size != 0) |
| 435 | 48 | break; | |
| 436 | /* skip pass if empty row */ | ||
| 437 | } | ||
| 438 | } | ||
| 439 | } | ||
| 440 | } | ||
| 441 | 1920 | the_end:; | |
| 442 | } | ||
| 443 | 123247 | } | |
| 444 | |||
| 445 | 16343 | static int png_decode_idat(PNGDecContext *s, GetByteContext *gb, | |
| 446 | uint8_t *dst, ptrdiff_t dst_stride) | ||
| 447 | { | ||
| 448 | 16343 | z_stream *const zstream = &s->zstream.zstream; | |
| 449 | int ret; | ||
| 450 | 16343 | zstream->avail_in = bytestream2_get_bytes_left(gb); | |
| 451 | 16343 | zstream->next_in = gb->buffer; | |
| 452 | |||
| 453 | /* decode one line if possible */ | ||
| 454 |
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|
155250 | while (zstream->avail_in > 0) { |
| 455 | 138907 | ret = inflate(zstream, Z_PARTIAL_FLUSH); | |
| 456 |
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138907 | if (ret != Z_OK && ret != Z_STREAM_END) { |
| 457 | ✗ | av_log(s->avctx, AV_LOG_ERROR, "inflate returned error %d\n", ret); | |
| 458 | ✗ | return AVERROR_EXTERNAL; | |
| 459 | } | ||
| 460 |
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138907 | if (zstream->avail_out == 0) { |
| 461 |
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123247 | if (!(s->pic_state & PNG_ALLIMAGE)) { |
| 462 | 123247 | png_handle_row(s, dst, dst_stride); | |
| 463 | } | ||
| 464 | 123247 | zstream->avail_out = s->crow_size; | |
| 465 | 123247 | zstream->next_out = s->crow_buf; | |
| 466 | } | ||
| 467 |
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138907 | if (ret == Z_STREAM_END && zstream->avail_in > 0) { |
| 468 | ✗ | av_log(s->avctx, AV_LOG_WARNING, | |
| 469 | "%d undecompressed bytes left in buffer\n", zstream->avail_in); | ||
| 470 | ✗ | return 0; | |
| 471 | } | ||
| 472 | } | ||
| 473 | 16343 | return 0; | |
| 474 | } | ||
| 475 | |||
| 476 | 6 | static int decode_zbuf(AVBPrint *bp, const uint8_t *data, | |
| 477 | const uint8_t *data_end, void *logctx) | ||
| 478 | { | ||
| 479 | FFZStream z; | ||
| 480 | 6 | z_stream *const zstream = &z.zstream; | |
| 481 | unsigned char *buf; | ||
| 482 | unsigned buf_size; | ||
| 483 | 6 | int ret = ff_inflate_init(&z, logctx); | |
| 484 |
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|
6 | if (ret < 0) |
| 485 | ✗ | return ret; | |
| 486 | |||
| 487 | 6 | zstream->next_in = data; | |
| 488 | 6 | zstream->avail_in = data_end - data; | |
| 489 | 6 | av_bprint_init(bp, 0, AV_BPRINT_SIZE_UNLIMITED); | |
| 490 | |||
| 491 |
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18 | while (zstream->avail_in > 0) { |
| 492 | 18 | av_bprint_get_buffer(bp, 2, &buf, &buf_size); | |
| 493 |
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|
18 | if (buf_size < 2) { |
| 494 | ✗ | ret = AVERROR(ENOMEM); | |
| 495 | ✗ | goto fail; | |
| 496 | } | ||
| 497 | 18 | zstream->next_out = buf; | |
| 498 | 18 | zstream->avail_out = buf_size - 1; | |
| 499 | 18 | ret = inflate(zstream, Z_PARTIAL_FLUSH); | |
| 500 |
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18 | if (ret != Z_OK && ret != Z_STREAM_END) { |
| 501 | ✗ | ret = AVERROR_EXTERNAL; | |
| 502 | ✗ | goto fail; | |
| 503 | } | ||
| 504 | 18 | bp->len += zstream->next_out - buf; | |
| 505 |
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18 | if (ret == Z_STREAM_END) |
| 506 | 6 | break; | |
| 507 | } | ||
| 508 | 6 | ff_inflate_end(&z); | |
| 509 | 6 | bp->str[bp->len] = 0; | |
| 510 | 6 | return 0; | |
| 511 | |||
| 512 | ✗ | fail: | |
| 513 | ✗ | ff_inflate_end(&z); | |
| 514 | ✗ | av_bprint_finalize(bp, NULL); | |
| 515 | ✗ | return ret; | |
| 516 | } | ||
| 517 | |||
| 518 | 276 | static char *iso88591_to_utf8(const char *in, size_t size_in) | |
| 519 | { | ||
| 520 | 276 | size_t extra = 0, i; | |
| 521 | char *out, *q; | ||
| 522 | |||
| 523 |
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4821 | for (i = 0; i < size_in; i++) |
| 524 | 4545 | extra += !!(in[i] & 0x80); | |
| 525 |
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276 | if (size_in == SIZE_MAX || extra > SIZE_MAX - size_in - 1) |
| 526 | ✗ | return NULL; | |
| 527 | 276 | q = out = av_malloc(size_in + extra + 1); | |
| 528 |
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|
276 | if (!out) |
| 529 | ✗ | return NULL; | |
| 530 |
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4821 | for (i = 0; i < size_in; i++) { |
| 531 |
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4545 | if (in[i] & 0x80) { |
| 532 | ✗ | *(q++) = 0xC0 | (in[i] >> 6); | |
| 533 | ✗ | *(q++) = 0x80 | (in[i] & 0x3F); | |
| 534 | } else { | ||
| 535 | 4545 | *(q++) = in[i]; | |
| 536 | } | ||
| 537 | } | ||
| 538 | 276 | *(q++) = 0; | |
| 539 | 276 | return out; | |
| 540 | } | ||
| 541 | |||
| 542 | 138 | static int decode_text_chunk(PNGDecContext *s, GetByteContext *gb, int compressed) | |
| 543 | { | ||
| 544 | int ret, method; | ||
| 545 | 138 | const uint8_t *data = gb->buffer; | |
| 546 | 138 | const uint8_t *data_end = gb->buffer_end; | |
| 547 | 138 | const char *keyword = data; | |
| 548 | 138 | const char *keyword_end = memchr(keyword, 0, data_end - data); | |
| 549 | 138 | char *kw_utf8 = NULL, *txt_utf8 = NULL; | |
| 550 | const char *text; | ||
| 551 | unsigned text_len; | ||
| 552 | AVBPrint bp; | ||
| 553 | |||
| 554 |
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138 | if (!keyword_end) |
| 555 | ✗ | return AVERROR_INVALIDDATA; | |
| 556 | 138 | data = keyword_end + 1; | |
| 557 | |||
| 558 |
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138 | if (compressed) { |
| 559 | ✗ | if (data == data_end) | |
| 560 | ✗ | return AVERROR_INVALIDDATA; | |
| 561 | ✗ | method = *(data++); | |
| 562 | ✗ | if (method) | |
| 563 | ✗ | return AVERROR_INVALIDDATA; | |
| 564 | ✗ | if ((ret = decode_zbuf(&bp, data, data_end, s->avctx)) < 0) | |
| 565 | ✗ | return ret; | |
| 566 | ✗ | text = bp.str; | |
| 567 | ✗ | text_len = bp.len; | |
| 568 | } else { | ||
| 569 | 138 | text = data; | |
| 570 | 138 | text_len = data_end - data; | |
| 571 | } | ||
| 572 | |||
| 573 | 138 | txt_utf8 = iso88591_to_utf8(text, text_len); | |
| 574 |
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138 | if (compressed) |
| 575 | ✗ | av_bprint_finalize(&bp, NULL); | |
| 576 |
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138 | if (!txt_utf8) |
| 577 | ✗ | return AVERROR(ENOMEM); | |
| 578 | 138 | kw_utf8 = iso88591_to_utf8(keyword, keyword_end - keyword); | |
| 579 |
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138 | if (!kw_utf8) { |
| 580 | ✗ | av_free(txt_utf8); | |
| 581 | ✗ | return AVERROR(ENOMEM); | |
| 582 | } | ||
| 583 | |||
| 584 | 138 | av_dict_set(&s->frame_metadata, kw_utf8, txt_utf8, | |
| 585 | AV_DICT_DONT_STRDUP_KEY | AV_DICT_DONT_STRDUP_VAL); | ||
| 586 | 138 | return 0; | |
| 587 | } | ||
| 588 | |||
| 589 | 413 | static int decode_ihdr_chunk(AVCodecContext *avctx, PNGDecContext *s, | |
| 590 | GetByteContext *gb) | ||
| 591 | { | ||
| 592 |
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413 | if (bytestream2_get_bytes_left(gb) != 13) |
| 593 | ✗ | return AVERROR_INVALIDDATA; | |
| 594 | |||
| 595 |
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413 | if (s->pic_state & PNG_IDAT) { |
| 596 | ✗ | av_log(avctx, AV_LOG_ERROR, "IHDR after IDAT\n"); | |
| 597 | ✗ | return AVERROR_INVALIDDATA; | |
| 598 | } | ||
| 599 | |||
| 600 |
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413 | if (s->hdr_state & PNG_IHDR) { |
| 601 | ✗ | av_log(avctx, AV_LOG_ERROR, "Multiple IHDR\n"); | |
| 602 | ✗ | return AVERROR_INVALIDDATA; | |
| 603 | } | ||
| 604 | |||
| 605 | 413 | s->width = s->cur_w = bytestream2_get_be32(gb); | |
| 606 | 413 | s->height = s->cur_h = bytestream2_get_be32(gb); | |
| 607 |
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|
413 | if (av_image_check_size(s->width, s->height, 0, avctx)) { |
| 608 | ✗ | s->cur_w = s->cur_h = s->width = s->height = 0; | |
| 609 | ✗ | av_log(avctx, AV_LOG_ERROR, "Invalid image size\n"); | |
| 610 | ✗ | return AVERROR_INVALIDDATA; | |
| 611 | } | ||
| 612 | 413 | s->bit_depth = bytestream2_get_byte(gb); | |
| 613 |
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413 | if (s->bit_depth != 1 && s->bit_depth != 2 && s->bit_depth != 4 && |
| 614 |
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413 | s->bit_depth != 8 && s->bit_depth != 16) { |
| 615 | ✗ | av_log(avctx, AV_LOG_ERROR, "Invalid bit depth\n"); | |
| 616 | ✗ | goto error; | |
| 617 | } | ||
| 618 | 413 | s->color_type = bytestream2_get_byte(gb); | |
| 619 | 413 | s->compression_type = bytestream2_get_byte(gb); | |
| 620 |
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413 | if (s->compression_type) { |
| 621 | ✗ | av_log(avctx, AV_LOG_ERROR, "Invalid compression method %d\n", s->compression_type); | |
| 622 | ✗ | goto error; | |
| 623 | } | ||
| 624 | 413 | s->filter_type = bytestream2_get_byte(gb); | |
| 625 | 413 | s->interlace_type = bytestream2_get_byte(gb); | |
| 626 | 413 | s->hdr_state |= PNG_IHDR; | |
| 627 |
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413 | if (avctx->debug & FF_DEBUG_PICT_INFO) |
| 628 | ✗ | av_log(avctx, AV_LOG_DEBUG, "width=%d height=%d depth=%d color_type=%d " | |
| 629 | "compression_type=%d filter_type=%d interlace_type=%d\n", | ||
| 630 | s->width, s->height, s->bit_depth, s->color_type, | ||
| 631 | s->compression_type, s->filter_type, s->interlace_type); | ||
| 632 | |||
| 633 | 413 | return 0; | |
| 634 | ✗ | error: | |
| 635 | ✗ | s->cur_w = s->cur_h = s->width = s->height = 0; | |
| 636 | ✗ | s->bit_depth = 8; | |
| 637 | ✗ | return AVERROR_INVALIDDATA; | |
| 638 | } | ||
| 639 | |||
| 640 | 380 | static int decode_phys_chunk(AVCodecContext *avctx, PNGDecContext *s, | |
| 641 | GetByteContext *gb) | ||
| 642 | { | ||
| 643 |
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380 | if (s->pic_state & PNG_IDAT) { |
| 644 | ✗ | av_log(avctx, AV_LOG_ERROR, "pHYs after IDAT\n"); | |
| 645 | ✗ | return AVERROR_INVALIDDATA; | |
| 646 | } | ||
| 647 | 380 | avctx->sample_aspect_ratio.num = bytestream2_get_be32(gb); | |
| 648 | 380 | avctx->sample_aspect_ratio.den = bytestream2_get_be32(gb); | |
| 649 |
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380 | if (avctx->sample_aspect_ratio.num < 0 || avctx->sample_aspect_ratio.den < 0) |
| 650 | ✗ | avctx->sample_aspect_ratio = (AVRational){ 0, 1 }; | |
| 651 | 380 | bytestream2_skip(gb, 1); /* unit specifier */ | |
| 652 | |||
| 653 | 380 | return 0; | |
| 654 | } | ||
| 655 | |||
| 656 | /* | ||
| 657 | * This populates AVCodecContext fields so it must be called before | ||
| 658 | * ff_thread_finish_setup() to avoid a race condition with respect to the | ||
| 659 | * generic copying of avctx fields. | ||
| 660 | */ | ||
| 661 | 658 | static int populate_avctx_color_fields(AVCodecContext *avctx, AVFrame *frame) | |
| 662 | { | ||
| 663 | 658 | PNGDecContext *s = avctx->priv_data; | |
| 664 | int ret; | ||
| 665 | |||
| 666 |
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658 | if (s->have_cicp) { |
| 667 | ✗ | if (s->cicp_primaries >= AVCOL_PRI_NB) | |
| 668 | ✗ | av_log(avctx, AV_LOG_WARNING, "unrecognized cICP primaries\n"); | |
| 669 | else | ||
| 670 | ✗ | avctx->color_primaries = frame->color_primaries = s->cicp_primaries; | |
| 671 | ✗ | if (s->cicp_trc >= AVCOL_TRC_NB) | |
| 672 | ✗ | av_log(avctx, AV_LOG_WARNING, "unrecognized cICP transfer\n"); | |
| 673 | else | ||
| 674 | ✗ | avctx->color_trc = frame->color_trc = s->cicp_trc; | |
| 675 | ✗ | if (s->cicp_range == 0) { | |
| 676 | ✗ | av_log(avctx, AV_LOG_WARNING, "tv-range cICP tag found. Colors may be wrong\n"); | |
| 677 | ✗ | avctx->color_range = frame->color_range = AVCOL_RANGE_MPEG; | |
| 678 | ✗ | } else if (s->cicp_range != 1) { | |
| 679 | /* we already printed a warning when parsing the cICP chunk */ | ||
| 680 | ✗ | avctx->color_range = frame->color_range = AVCOL_RANGE_UNSPECIFIED; | |
| 681 | } | ||
| 682 |
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658 | } else if (s->iccp_data) { |
| 683 | AVFrameSideData *sd; | ||
| 684 | 6 | ret = ff_frame_new_side_data(avctx, frame, AV_FRAME_DATA_ICC_PROFILE, | |
| 685 | s->iccp_data_len, &sd); | ||
| 686 |
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6 | if (ret < 0) |
| 687 | ✗ | return ret; | |
| 688 |
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6 | if (sd) { |
| 689 | 6 | memcpy(sd->data, s->iccp_data, s->iccp_data_len); | |
| 690 | 6 | av_dict_set(&sd->metadata, "name", s->iccp_name, 0); | |
| 691 | } | ||
| 692 |
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652 | } else if (s->have_srgb) { |
| 693 | 39 | avctx->color_primaries = frame->color_primaries = AVCOL_PRI_BT709; | |
| 694 | 39 | avctx->color_trc = frame->color_trc = AVCOL_TRC_IEC61966_2_1; | |
| 695 |
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613 | } else if (s->have_chrm) { |
| 696 | AVColorPrimariesDesc desc; | ||
| 697 | enum AVColorPrimaries prim; | ||
| 698 | 6 | desc.wp.x = av_make_q(s->white_point[0], 100000); | |
| 699 | 6 | desc.wp.y = av_make_q(s->white_point[1], 100000); | |
| 700 | 6 | desc.prim.r.x = av_make_q(s->display_primaries[0][0], 100000); | |
| 701 | 6 | desc.prim.r.y = av_make_q(s->display_primaries[0][1], 100000); | |
| 702 | 6 | desc.prim.g.x = av_make_q(s->display_primaries[1][0], 100000); | |
| 703 | 6 | desc.prim.g.y = av_make_q(s->display_primaries[1][1], 100000); | |
| 704 | 6 | desc.prim.b.x = av_make_q(s->display_primaries[2][0], 100000); | |
| 705 | 6 | desc.prim.b.y = av_make_q(s->display_primaries[2][1], 100000); | |
| 706 | 6 | prim = av_csp_primaries_id_from_desc(&desc); | |
| 707 |
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6 | if (prim != AVCOL_PRI_UNSPECIFIED) |
| 708 | 6 | avctx->color_primaries = frame->color_primaries = prim; | |
| 709 | else | ||
| 710 | ✗ | av_log(avctx, AV_LOG_WARNING, "unknown cHRM primaries\n"); | |
| 711 | } | ||
| 712 | |||
| 713 | /* these chunks override gAMA */ | ||
| 714 |
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658 | if (s->iccp_data || s->have_srgb || s->have_cicp) { |
| 715 | 45 | av_dict_set(&s->frame_metadata, "gamma", NULL, 0); | |
| 716 |
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613 | } else if (s->gamma) { |
| 717 | /* | ||
| 718 | * These values are 100000/2.2, 100000/2.8, 100000/2.6, and | ||
| 719 | * 100000/1.0 respectively. 45455, 35714, and 38462, and 100000. | ||
| 720 | * There's a 0.001 gamma tolerance here in case of floating | ||
| 721 | * point issues when the PNG was written. | ||
| 722 | * | ||
| 723 | * None of the other enums have a pure gamma curve so it makes | ||
| 724 | * sense to leave those to sRGB and cICP. | ||
| 725 | */ | ||
| 726 |
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34 | if (s->gamma > 45355 && s->gamma < 45555) |
| 727 | 26 | avctx->color_trc = frame->color_trc = AVCOL_TRC_GAMMA22; | |
| 728 |
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8 | else if (s->gamma > 35614 && s->gamma < 35814) |
| 729 | ✗ | avctx->color_trc = frame->color_trc = AVCOL_TRC_GAMMA28; | |
| 730 |
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8 | else if (s->gamma > 38362 && s->gamma < 38562) |
| 731 | ✗ | avctx->color_trc = frame->color_trc = AVCOL_TRC_SMPTE428; | |
| 732 |
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8 | else if (s->gamma > 99900 && s->gamma < 100100) |
| 733 | ✗ | avctx->color_trc = frame->color_trc = AVCOL_TRC_LINEAR; | |
| 734 | } | ||
| 735 | |||
| 736 | /* PNG only supports RGB */ | ||
| 737 | 658 | avctx->colorspace = frame->colorspace = AVCOL_SPC_RGB; | |
| 738 |
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658 | if (!s->have_cicp || s->cicp_range == 1) |
| 739 | 658 | avctx->color_range = frame->color_range = AVCOL_RANGE_JPEG; | |
| 740 | |||
| 741 | /* | ||
| 742 | * tRNS sets alpha depth to full, so we ignore sBIT if set. | ||
| 743 | * As a result we must wait until now to set | ||
| 744 | * avctx->bits_per_raw_sample in case tRNS appears after sBIT | ||
| 745 | */ | ||
| 746 |
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658 | if (!s->has_trns && s->significant_bits > 0) |
| 747 | ✗ | avctx->bits_per_raw_sample = s->significant_bits; | |
| 748 | |||
| 749 |
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658 | if (s->have_clli) { |
| 750 | AVContentLightMetadata *clli; | ||
| 751 | |||
| 752 | ✗ | ret = ff_decode_content_light_new(avctx, frame, &clli); | |
| 753 | ✗ | if (ret < 0) | |
| 754 | ✗ | return ret; | |
| 755 | |||
| 756 | ✗ | if (clli) { | |
| 757 | /* | ||
| 758 | * 0.0001 divisor value | ||
| 759 | * see: https://www.w3.org/TR/png-3/#cLLi-chunk | ||
| 760 | */ | ||
| 761 | ✗ | clli->MaxCLL = s->clli_max / 10000; | |
| 762 | ✗ | clli->MaxFALL = s->clli_avg / 10000; | |
| 763 | } | ||
| 764 | } | ||
| 765 | |||
| 766 |
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658 | if (s->have_mdvc) { |
| 767 | AVMasteringDisplayMetadata *mdvc; | ||
| 768 | |||
| 769 | ✗ | ret = ff_decode_mastering_display_new(avctx, frame, &mdvc); | |
| 770 | ✗ | if (ret < 0) | |
| 771 | ✗ | return ret; | |
| 772 | |||
| 773 | ✗ | if (mdvc) { | |
| 774 | ✗ | mdvc->has_primaries = 1; | |
| 775 | ✗ | for (int i = 0; i < 3; i++) { | |
| 776 | ✗ | mdvc->display_primaries[i][0] = av_make_q(s->mdvc_primaries[i][0], 50000); | |
| 777 | ✗ | mdvc->display_primaries[i][1] = av_make_q(s->mdvc_primaries[i][1], 50000); | |
| 778 | } | ||
| 779 | ✗ | mdvc->white_point[0] = av_make_q(s->mdvc_white_point[0], 50000); | |
| 780 | ✗ | mdvc->white_point[1] = av_make_q(s->mdvc_white_point[1], 50000); | |
| 781 | ✗ | mdvc->has_luminance = 1; | |
| 782 | ✗ | mdvc->max_luminance = av_make_q(s->mdvc_max_lum, 10000); | |
| 783 | ✗ | mdvc->min_luminance = av_make_q(s->mdvc_min_lum, 10000); | |
| 784 | } | ||
| 785 | } | ||
| 786 | |||
| 787 | 658 | return 0; | |
| 788 | } | ||
| 789 | |||
| 790 | 16343 | static int decode_idat_chunk(AVCodecContext *avctx, PNGDecContext *s, | |
| 791 | GetByteContext *gb, AVFrame *p) | ||
| 792 | { | ||
| 793 | int ret; | ||
| 794 |
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16343 | size_t byte_depth = s->bit_depth > 8 ? 2 : 1; |
| 795 | |||
| 796 |
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16343 | if (!p) |
| 797 | ✗ | return AVERROR_INVALIDDATA; | |
| 798 |
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16343 | if (!(s->hdr_state & PNG_IHDR)) { |
| 799 | ✗ | av_log(avctx, AV_LOG_ERROR, "IDAT without IHDR\n"); | |
| 800 | ✗ | return AVERROR_INVALIDDATA; | |
| 801 | } | ||
| 802 |
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16343 | if (!(s->pic_state & PNG_IDAT)) { |
| 803 | /* init image info */ | ||
| 804 | 658 | ret = ff_set_dimensions(avctx, s->width, s->height); | |
| 805 |
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658 | if (ret < 0) |
| 806 | ✗ | return ret; | |
| 807 | |||
| 808 | 658 | s->channels = ff_png_get_nb_channels(s->color_type); | |
| 809 | 658 | s->bits_per_pixel = s->bit_depth * s->channels; | |
| 810 | 658 | s->bpp = (s->bits_per_pixel + 7) >> 3; | |
| 811 | 658 | s->row_size = (s->cur_w * s->bits_per_pixel + 7) >> 3; | |
| 812 | |||
| 813 |
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658 | if ((s->bit_depth == 2 || s->bit_depth == 4 || s->bit_depth == 8) && |
| 814 |
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618 | s->color_type == PNG_COLOR_TYPE_RGB) { |
| 815 | 473 | avctx->pix_fmt = AV_PIX_FMT_RGB24; | |
| 816 |
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185 | } else if ((s->bit_depth == 2 || s->bit_depth == 4 || s->bit_depth == 8) && |
| 817 |
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145 | s->color_type == PNG_COLOR_TYPE_RGB_ALPHA) { |
| 818 | 97 | avctx->pix_fmt = AV_PIX_FMT_RGBA; | |
| 819 |
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88 | } else if ((s->bit_depth == 2 || s->bit_depth == 4 || s->bit_depth == 8) && |
| 820 |
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48 | s->color_type == PNG_COLOR_TYPE_GRAY) { |
| 821 | 4 | avctx->pix_fmt = AV_PIX_FMT_GRAY8; | |
| 822 |
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84 | } else if (s->bit_depth == 16 && |
| 823 |
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40 | s->color_type == PNG_COLOR_TYPE_GRAY) { |
| 824 | 16 | avctx->pix_fmt = AV_PIX_FMT_GRAY16BE; | |
| 825 |
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68 | } else if (s->bit_depth == 16 && |
| 826 |
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24 | s->color_type == PNG_COLOR_TYPE_RGB) { |
| 827 | 18 | avctx->pix_fmt = AV_PIX_FMT_RGB48BE; | |
| 828 |
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50 | } else if (s->bit_depth == 16 && |
| 829 |
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6 | s->color_type == PNG_COLOR_TYPE_RGB_ALPHA) { |
| 830 | 4 | avctx->pix_fmt = AV_PIX_FMT_RGBA64BE; | |
| 831 |
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46 | } else if ((s->bits_per_pixel == 1 || s->bits_per_pixel == 2 || s->bits_per_pixel == 4 || s->bits_per_pixel == 8) && |
| 832 |
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42 | s->color_type == PNG_COLOR_TYPE_PALETTE) { |
| 833 |
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42 | avctx->pix_fmt = avctx->codec_id == AV_CODEC_ID_APNG ? AV_PIX_FMT_RGBA : AV_PIX_FMT_PAL8; |
| 834 |
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4 | } else if (s->bit_depth == 1 && s->bits_per_pixel == 1 && avctx->codec_id != AV_CODEC_ID_APNG) { |
| 835 | ✗ | avctx->pix_fmt = AV_PIX_FMT_MONOBLACK; | |
| 836 |
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4 | } else if (s->bit_depth == 8 && |
| 837 |
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2 | s->color_type == PNG_COLOR_TYPE_GRAY_ALPHA) { |
| 838 | 2 | avctx->pix_fmt = AV_PIX_FMT_YA8; | |
| 839 |
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2 | } else if (s->bit_depth == 16 && |
| 840 |
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2 | s->color_type == PNG_COLOR_TYPE_GRAY_ALPHA) { |
| 841 | 2 | avctx->pix_fmt = AV_PIX_FMT_YA16BE; | |
| 842 | } else { | ||
| 843 | ✗ | avpriv_report_missing_feature(avctx, | |
| 844 | "Bit depth %d color type %d", | ||
| 845 | s->bit_depth, s->color_type); | ||
| 846 | ✗ | return AVERROR_PATCHWELCOME; | |
| 847 | } | ||
| 848 | |||
| 849 |
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658 | if (s->has_trns && s->color_type != PNG_COLOR_TYPE_PALETTE) { |
| 850 |
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137 | switch (avctx->pix_fmt) { |
| 851 | 137 | case AV_PIX_FMT_RGB24: | |
| 852 | 137 | avctx->pix_fmt = AV_PIX_FMT_RGBA; | |
| 853 | 137 | break; | |
| 854 | |||
| 855 | ✗ | case AV_PIX_FMT_RGB48BE: | |
| 856 | ✗ | avctx->pix_fmt = AV_PIX_FMT_RGBA64BE; | |
| 857 | ✗ | break; | |
| 858 | |||
| 859 | ✗ | case AV_PIX_FMT_GRAY8: | |
| 860 | ✗ | avctx->pix_fmt = AV_PIX_FMT_YA8; | |
| 861 | ✗ | break; | |
| 862 | |||
| 863 | ✗ | case AV_PIX_FMT_GRAY16BE: | |
| 864 | ✗ | avctx->pix_fmt = AV_PIX_FMT_YA16BE; | |
| 865 | ✗ | break; | |
| 866 | |||
| 867 | ✗ | default: | |
| 868 | ✗ | avpriv_request_sample(avctx, "bit depth %d " | |
| 869 | "and color type %d with TRNS", | ||
| 870 | s->bit_depth, s->color_type); | ||
| 871 | ✗ | return AVERROR_INVALIDDATA; | |
| 872 | } | ||
| 873 | |||
| 874 | 137 | s->bpp += byte_depth; | |
| 875 | } | ||
| 876 | |||
| 877 | 658 | ff_progress_frame_unref(&s->picture); | |
| 878 |
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658 | if (s->dispose_op == APNG_DISPOSE_OP_PREVIOUS) { |
| 879 | /* We only need a buffer for the current picture. */ | ||
| 880 | 1 | ret = ff_thread_get_buffer(avctx, p, 0); | |
| 881 |
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1 | if (ret < 0) |
| 882 | ✗ | return ret; | |
| 883 |
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657 | } else if (s->dispose_op == APNG_DISPOSE_OP_BACKGROUND) { |
| 884 | /* We need a buffer for the current picture as well as | ||
| 885 | * a buffer for the reference to retain. */ | ||
| 886 | 12 | ret = ff_progress_frame_get_buffer(avctx, &s->picture, | |
| 887 | AV_GET_BUFFER_FLAG_REF); | ||
| 888 |
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12 | if (ret < 0) |
| 889 | ✗ | return ret; | |
| 890 | 12 | ret = ff_thread_get_buffer(avctx, p, 0); | |
| 891 |
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12 | if (ret < 0) |
| 892 | ✗ | return ret; | |
| 893 | } else { | ||
| 894 | /* The picture output this time and the reference to retain coincide. */ | ||
| 895 | 645 | ret = ff_progress_frame_get_buffer(avctx, &s->picture, | |
| 896 | AV_GET_BUFFER_FLAG_REF); | ||
| 897 |
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645 | if (ret < 0) |
| 898 | ✗ | return ret; | |
| 899 | 645 | ret = av_frame_ref(p, s->picture.f); | |
| 900 |
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645 | if (ret < 0) |
| 901 | ✗ | return ret; | |
| 902 | } | ||
| 903 | |||
| 904 | 658 | p->pict_type = AV_PICTURE_TYPE_I; | |
| 905 | 658 | p->flags |= AV_FRAME_FLAG_KEY; | |
| 906 |
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658 | p->flags |= AV_FRAME_FLAG_INTERLACED * !!s->interlace_type; |
| 907 | |||
| 908 |
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658 | if ((ret = populate_avctx_color_fields(avctx, p)) < 0) |
| 909 | ✗ | return ret; | |
| 910 | 658 | ff_thread_finish_setup(avctx); | |
| 911 | |||
| 912 | /* compute the compressed row size */ | ||
| 913 |
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658 | if (!s->interlace_type) { |
| 914 | 650 | s->crow_size = s->row_size + 1; | |
| 915 | } else { | ||
| 916 | 8 | s->pass = 0; | |
| 917 | 8 | s->pass_row_size = ff_png_pass_row_size(s->pass, | |
| 918 | s->bits_per_pixel, | ||
| 919 | s->cur_w); | ||
| 920 | 8 | s->crow_size = s->pass_row_size + 1; | |
| 921 | } | ||
| 922 | ff_dlog(avctx, "row_size=%d crow_size =%d\n", | ||
| 923 | s->row_size, s->crow_size); | ||
| 924 | |||
| 925 | /* copy the palette if needed */ | ||
| 926 |
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658 | if (avctx->pix_fmt == AV_PIX_FMT_PAL8) |
| 927 | ✗ | memcpy(p->data[1], s->palette, 256 * sizeof(uint32_t)); | |
| 928 | /* empty row is used if differencing to the first row */ | ||
| 929 | 658 | av_fast_padded_mallocz(&s->last_row, &s->last_row_size, s->row_size); | |
| 930 |
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658 | if (!s->last_row) |
| 931 | ✗ | return AVERROR_INVALIDDATA; | |
| 932 |
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658 | if (s->interlace_type || |
| 933 |
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650 | s->color_type == PNG_COLOR_TYPE_RGB_ALPHA) { |
| 934 | 109 | av_fast_padded_malloc(&s->tmp_row, &s->tmp_row_size, s->row_size); | |
| 935 |
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109 | if (!s->tmp_row) |
| 936 | ✗ | return AVERROR_INVALIDDATA; | |
| 937 | } | ||
| 938 | /* compressed row */ | ||
| 939 | 658 | av_fast_padded_malloc(&s->buffer, &s->buffer_size, s->row_size + 16); | |
| 940 |
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658 | if (!s->buffer) |
| 941 | ✗ | return AVERROR(ENOMEM); | |
| 942 | |||
| 943 | /* we want crow_buf+1 to be 16-byte aligned */ | ||
| 944 | 658 | s->crow_buf = s->buffer + 15; | |
| 945 | 658 | s->zstream.zstream.avail_out = s->crow_size; | |
| 946 | 658 | s->zstream.zstream.next_out = s->crow_buf; | |
| 947 | } | ||
| 948 | |||
| 949 | 16343 | s->pic_state |= PNG_IDAT; | |
| 950 | |||
| 951 | /* set image to non-transparent bpp while decompressing */ | ||
| 952 |
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16343 | if (s->has_trns && s->color_type != PNG_COLOR_TYPE_PALETTE) |
| 953 | 147 | s->bpp -= byte_depth; | |
| 954 | |||
| 955 | 16343 | ret = png_decode_idat(s, gb, p->data[0], p->linesize[0]); | |
| 956 | |||
| 957 |
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16343 | if (s->has_trns && s->color_type != PNG_COLOR_TYPE_PALETTE) |
| 958 | 147 | s->bpp += byte_depth; | |
| 959 | |||
| 960 |
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16343 | if (ret < 0) |
| 961 | ✗ | return ret; | |
| 962 | |||
| 963 | 16343 | return 0; | |
| 964 | } | ||
| 965 | |||
| 966 | 3 | static int decode_plte_chunk(AVCodecContext *avctx, PNGDecContext *s, | |
| 967 | GetByteContext *gb) | ||
| 968 | { | ||
| 969 | 3 | int length = bytestream2_get_bytes_left(gb); | |
| 970 | int n, i, r, g, b; | ||
| 971 | |||
| 972 |
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3 | if ((length % 3) != 0 || length > 256 * 3) |
| 973 | ✗ | return AVERROR_INVALIDDATA; | |
| 974 | /* read the palette */ | ||
| 975 | 3 | n = length / 3; | |
| 976 |
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711 | for (i = 0; i < n; i++) { |
| 977 | 708 | r = bytestream2_get_byte(gb); | |
| 978 | 708 | g = bytestream2_get_byte(gb); | |
| 979 | 708 | b = bytestream2_get_byte(gb); | |
| 980 | 708 | s->palette[i] = (0xFFU << 24) | (r << 16) | (g << 8) | b; | |
| 981 | } | ||
| 982 |
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63 | for (; i < 256; i++) |
| 983 | 60 | s->palette[i] = (0xFFU << 24); | |
| 984 | 3 | s->hdr_state |= PNG_PLTE; | |
| 985 | |||
| 986 | 3 | return 0; | |
| 987 | } | ||
| 988 | |||
| 989 | 7 | static int decode_trns_chunk(AVCodecContext *avctx, PNGDecContext *s, | |
| 990 | GetByteContext *gb) | ||
| 991 | { | ||
| 992 | 7 | int length = bytestream2_get_bytes_left(gb); | |
| 993 | int v, i; | ||
| 994 | |||
| 995 |
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7 | if (!(s->hdr_state & PNG_IHDR)) { |
| 996 | ✗ | av_log(avctx, AV_LOG_ERROR, "trns before IHDR\n"); | |
| 997 | ✗ | return AVERROR_INVALIDDATA; | |
| 998 | } | ||
| 999 | |||
| 1000 |
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7 | if (s->pic_state & PNG_IDAT) { |
| 1001 | ✗ | av_log(avctx, AV_LOG_ERROR, "trns after IDAT\n"); | |
| 1002 | ✗ | return AVERROR_INVALIDDATA; | |
| 1003 | } | ||
| 1004 | |||
| 1005 |
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7 | if (s->color_type == PNG_COLOR_TYPE_PALETTE) { |
| 1006 |
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3 | if (length > 256 || !(s->hdr_state & PNG_PLTE)) |
| 1007 | ✗ | return AVERROR_INVALIDDATA; | |
| 1008 | |||
| 1009 |
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54 | for (i = 0; i < length; i++) { |
| 1010 | 51 | unsigned v = bytestream2_get_byte(gb); | |
| 1011 | 51 | s->palette[i] = (s->palette[i] & 0x00ffffff) | (v << 24); | |
| 1012 | } | ||
| 1013 |
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4 | } else if (s->color_type == PNG_COLOR_TYPE_GRAY || s->color_type == PNG_COLOR_TYPE_RGB) { |
| 1014 |
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4 | if ((s->color_type == PNG_COLOR_TYPE_GRAY && length != 2) || |
| 1015 |
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4 | (s->color_type == PNG_COLOR_TYPE_RGB && length != 6) || |
| 1016 |
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4 | s->bit_depth == 1) |
| 1017 | ✗ | return AVERROR_INVALIDDATA; | |
| 1018 | |||
| 1019 |
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16 | for (i = 0; i < length / 2; i++) { |
| 1020 | /* only use the least significant bits */ | ||
| 1021 | 12 | v = av_mod_uintp2(bytestream2_get_be16(gb), s->bit_depth); | |
| 1022 | |||
| 1023 |
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|
12 | if (s->bit_depth > 8) |
| 1024 | ✗ | AV_WB16(&s->transparent_color_be[2 * i], v); | |
| 1025 | else | ||
| 1026 | 12 | s->transparent_color_be[i] = v; | |
| 1027 | } | ||
| 1028 | } else { | ||
| 1029 | ✗ | return AVERROR_INVALIDDATA; | |
| 1030 | } | ||
| 1031 | |||
| 1032 | 7 | s->has_trns = 1; | |
| 1033 | |||
| 1034 | 7 | return 0; | |
| 1035 | } | ||
| 1036 | |||
| 1037 | 6 | static int decode_iccp_chunk(PNGDecContext *s, GetByteContext *gb) | |
| 1038 | { | ||
| 1039 | 6 | int ret, cnt = 0; | |
| 1040 | AVBPrint bp; | ||
| 1041 | |||
| 1042 |
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|
132 | while ((s->iccp_name[cnt++] = bytestream2_get_byte(gb)) && cnt < 81); |
| 1043 |
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|
6 | if (cnt > 80) { |
| 1044 | ✗ | av_log(s->avctx, AV_LOG_ERROR, "iCCP with invalid name!\n"); | |
| 1045 | ✗ | ret = AVERROR_INVALIDDATA; | |
| 1046 | ✗ | goto fail; | |
| 1047 | } | ||
| 1048 | |||
| 1049 |
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|
6 | if (bytestream2_get_byte(gb) != 0) { |
| 1050 | ✗ | av_log(s->avctx, AV_LOG_ERROR, "iCCP with invalid compression!\n"); | |
| 1051 | ✗ | ret = AVERROR_INVALIDDATA; | |
| 1052 | ✗ | goto fail; | |
| 1053 | } | ||
| 1054 | |||
| 1055 |
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|
6 | if ((ret = decode_zbuf(&bp, gb->buffer, gb->buffer_end, s->avctx)) < 0) |
| 1056 | ✗ | return ret; | |
| 1057 | |||
| 1058 | 6 | av_freep(&s->iccp_data); | |
| 1059 | 6 | ret = av_bprint_finalize(&bp, (char **)&s->iccp_data); | |
| 1060 |
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|
6 | if (ret < 0) |
| 1061 | ✗ | return ret; | |
| 1062 | 6 | s->iccp_data_len = bp.len; | |
| 1063 | |||
| 1064 | 6 | return 0; | |
| 1065 | ✗ | fail: | |
| 1066 | ✗ | s->iccp_name[0] = 0; | |
| 1067 | ✗ | return ret; | |
| 1068 | } | ||
| 1069 | |||
| 1070 | ✗ | static int decode_sbit_chunk(AVCodecContext *avctx, PNGDecContext *s, | |
| 1071 | GetByteContext *gb) | ||
| 1072 | { | ||
| 1073 | ✗ | int bits = 0; | |
| 1074 | int channels; | ||
| 1075 | |||
| 1076 | ✗ | if (!(s->hdr_state & PNG_IHDR)) { | |
| 1077 | ✗ | av_log(avctx, AV_LOG_ERROR, "sBIT before IHDR\n"); | |
| 1078 | ✗ | return AVERROR_INVALIDDATA; | |
| 1079 | } | ||
| 1080 | |||
| 1081 | ✗ | if (s->pic_state & PNG_IDAT) { | |
| 1082 | ✗ | av_log(avctx, AV_LOG_ERROR, "sBIT after IDAT\n"); | |
| 1083 | ✗ | return AVERROR_INVALIDDATA; | |
| 1084 | } | ||
| 1085 | |||
| 1086 | ✗ | channels = ff_png_get_nb_channels(s->color_type); | |
| 1087 | |||
| 1088 | ✗ | if (bytestream2_get_bytes_left(gb) != channels) | |
| 1089 | ✗ | return AVERROR_INVALIDDATA; | |
| 1090 | |||
| 1091 | ✗ | for (int i = 0; i < channels; i++) { | |
| 1092 | ✗ | int b = bytestream2_get_byteu(gb); | |
| 1093 | ✗ | bits = FFMAX(b, bits); | |
| 1094 | } | ||
| 1095 | |||
| 1096 | ✗ | if (bits < 0 || bits > s->bit_depth) { | |
| 1097 | ✗ | av_log(avctx, AV_LOG_ERROR, "Invalid significant bits: %d\n", bits); | |
| 1098 | ✗ | return AVERROR_INVALIDDATA; | |
| 1099 | } | ||
| 1100 | ✗ | s->significant_bits = bits; | |
| 1101 | |||
| 1102 | ✗ | return 0; | |
| 1103 | } | ||
| 1104 | |||
| 1105 | ✗ | static void handle_small_bpp(PNGDecContext *s, AVFrame *p) | |
| 1106 | { | ||
| 1107 | ✗ | if (s->bits_per_pixel == 1 && s->color_type == PNG_COLOR_TYPE_PALETTE) { | |
| 1108 | int i, j, k; | ||
| 1109 | ✗ | uint8_t *pd = p->data[0]; | |
| 1110 | ✗ | for (j = 0; j < s->height; j++) { | |
| 1111 | ✗ | i = s->width / 8; | |
| 1112 | ✗ | for (k = 7; k >= 1; k--) | |
| 1113 | ✗ | if ((s->width&7) >= k) | |
| 1114 | ✗ | pd[8*i + k - 1] = (pd[i]>>8-k) & 1; | |
| 1115 | ✗ | for (i--; i >= 0; i--) { | |
| 1116 | ✗ | pd[8*i + 7]= pd[i] & 1; | |
| 1117 | ✗ | pd[8*i + 6]= (pd[i]>>1) & 1; | |
| 1118 | ✗ | pd[8*i + 5]= (pd[i]>>2) & 1; | |
| 1119 | ✗ | pd[8*i + 4]= (pd[i]>>3) & 1; | |
| 1120 | ✗ | pd[8*i + 3]= (pd[i]>>4) & 1; | |
| 1121 | ✗ | pd[8*i + 2]= (pd[i]>>5) & 1; | |
| 1122 | ✗ | pd[8*i + 1]= (pd[i]>>6) & 1; | |
| 1123 | ✗ | pd[8*i + 0]= pd[i]>>7; | |
| 1124 | } | ||
| 1125 | ✗ | pd += p->linesize[0]; | |
| 1126 | } | ||
| 1127 | ✗ | } else if (s->bits_per_pixel == 2) { | |
| 1128 | int i, j; | ||
| 1129 | ✗ | uint8_t *pd = p->data[0]; | |
| 1130 | ✗ | for (j = 0; j < s->height; j++) { | |
| 1131 | ✗ | i = s->width / 4; | |
| 1132 | ✗ | if (s->color_type == PNG_COLOR_TYPE_PALETTE) { | |
| 1133 | ✗ | if ((s->width&3) >= 3) pd[4*i + 2]= (pd[i] >> 2) & 3; | |
| 1134 | ✗ | if ((s->width&3) >= 2) pd[4*i + 1]= (pd[i] >> 4) & 3; | |
| 1135 | ✗ | if ((s->width&3) >= 1) pd[4*i + 0]= pd[i] >> 6; | |
| 1136 | ✗ | for (i--; i >= 0; i--) { | |
| 1137 | ✗ | pd[4*i + 3]= pd[i] & 3; | |
| 1138 | ✗ | pd[4*i + 2]= (pd[i]>>2) & 3; | |
| 1139 | ✗ | pd[4*i + 1]= (pd[i]>>4) & 3; | |
| 1140 | ✗ | pd[4*i + 0]= pd[i]>>6; | |
| 1141 | } | ||
| 1142 | } else { | ||
| 1143 | ✗ | if ((s->width&3) >= 3) pd[4*i + 2]= ((pd[i]>>2) & 3)*0x55; | |
| 1144 | ✗ | if ((s->width&3) >= 2) pd[4*i + 1]= ((pd[i]>>4) & 3)*0x55; | |
| 1145 | ✗ | if ((s->width&3) >= 1) pd[4*i + 0]= ( pd[i]>>6 )*0x55; | |
| 1146 | ✗ | for (i--; i >= 0; i--) { | |
| 1147 | ✗ | pd[4*i + 3]= ( pd[i] & 3)*0x55; | |
| 1148 | ✗ | pd[4*i + 2]= ((pd[i]>>2) & 3)*0x55; | |
| 1149 | ✗ | pd[4*i + 1]= ((pd[i]>>4) & 3)*0x55; | |
| 1150 | ✗ | pd[4*i + 0]= ( pd[i]>>6 )*0x55; | |
| 1151 | } | ||
| 1152 | } | ||
| 1153 | ✗ | pd += p->linesize[0]; | |
| 1154 | } | ||
| 1155 | ✗ | } else if (s->bits_per_pixel == 4) { | |
| 1156 | int i, j; | ||
| 1157 | ✗ | uint8_t *pd = p->data[0]; | |
| 1158 | ✗ | for (j = 0; j < s->height; j++) { | |
| 1159 | ✗ | i = s->width/2; | |
| 1160 | ✗ | if (s->color_type == PNG_COLOR_TYPE_PALETTE) { | |
| 1161 | ✗ | if (s->width&1) pd[2*i+0]= pd[i]>>4; | |
| 1162 | ✗ | for (i--; i >= 0; i--) { | |
| 1163 | ✗ | pd[2*i + 1] = pd[i] & 15; | |
| 1164 | ✗ | pd[2*i + 0] = pd[i] >> 4; | |
| 1165 | } | ||
| 1166 | } else { | ||
| 1167 | ✗ | if (s->width & 1) pd[2*i + 0]= (pd[i] >> 4) * 0x11; | |
| 1168 | ✗ | for (i--; i >= 0; i--) { | |
| 1169 | ✗ | pd[2*i + 1] = (pd[i] & 15) * 0x11; | |
| 1170 | ✗ | pd[2*i + 0] = (pd[i] >> 4) * 0x11; | |
| 1171 | } | ||
| 1172 | } | ||
| 1173 | ✗ | pd += p->linesize[0]; | |
| 1174 | } | ||
| 1175 | } | ||
| 1176 | ✗ | } | |
| 1177 | |||
| 1178 | 262 | static int decode_fctl_chunk(AVCodecContext *avctx, PNGDecContext *s, | |
| 1179 | GetByteContext *gb) | ||
| 1180 | { | ||
| 1181 | uint32_t sequence_number; | ||
| 1182 | int cur_w, cur_h, x_offset, y_offset, dispose_op, blend_op; | ||
| 1183 | |||
| 1184 |
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|
262 | if (bytestream2_get_bytes_left(gb) != APNG_FCTL_CHUNK_SIZE) |
| 1185 | ✗ | return AVERROR_INVALIDDATA; | |
| 1186 | |||
| 1187 |
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|
262 | if (!(s->hdr_state & PNG_IHDR)) { |
| 1188 | ✗ | av_log(avctx, AV_LOG_ERROR, "fctl before IHDR\n"); | |
| 1189 | ✗ | return AVERROR_INVALIDDATA; | |
| 1190 | } | ||
| 1191 | |||
| 1192 |
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|
262 | if (s->pic_state & PNG_IDAT) { |
| 1193 | ✗ | av_log(avctx, AV_LOG_ERROR, "fctl after IDAT\n"); | |
| 1194 | ✗ | return AVERROR_INVALIDDATA; | |
| 1195 | } | ||
| 1196 | |||
| 1197 | 262 | sequence_number = bytestream2_get_be32(gb); | |
| 1198 | 262 | cur_w = bytestream2_get_be32(gb); | |
| 1199 | 262 | cur_h = bytestream2_get_be32(gb); | |
| 1200 | 262 | x_offset = bytestream2_get_be32(gb); | |
| 1201 | 262 | y_offset = bytestream2_get_be32(gb); | |
| 1202 | 262 | bytestream2_skip(gb, 4); /* delay_num (2), delay_den (2) */ | |
| 1203 | 262 | dispose_op = bytestream2_get_byte(gb); | |
| 1204 | 262 | blend_op = bytestream2_get_byte(gb); | |
| 1205 | |||
| 1206 |
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|
262 | if (sequence_number == 0 && |
| 1207 |
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16 | (cur_w != s->width || |
| 1208 |
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|
16 | cur_h != s->height || |
| 1209 |
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|
16 | x_offset != 0 || |
| 1210 |
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262 | y_offset != 0) || |
| 1211 |
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|
262 | cur_w <= 0 || cur_h <= 0 || |
| 1212 |
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262 | x_offset < 0 || y_offset < 0 || |
| 1213 |
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|
262 | cur_w > s->width - x_offset|| cur_h > s->height - y_offset) |
| 1214 | ✗ | return AVERROR_INVALIDDATA; | |
| 1215 | |||
| 1216 |
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|
262 | if (blend_op != APNG_BLEND_OP_OVER && blend_op != APNG_BLEND_OP_SOURCE) { |
| 1217 | ✗ | av_log(avctx, AV_LOG_ERROR, "Invalid blend_op %d\n", blend_op); | |
| 1218 | ✗ | return AVERROR_INVALIDDATA; | |
| 1219 | } | ||
| 1220 | |||
| 1221 |
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|
262 | if ((sequence_number == 0 || !s->last_picture.f->data[0]) && |
| 1222 | dispose_op == APNG_DISPOSE_OP_PREVIOUS) { | ||
| 1223 | // No previous frame to revert to for the first frame | ||
| 1224 | // Spec says to just treat it as a APNG_DISPOSE_OP_BACKGROUND | ||
| 1225 | ✗ | dispose_op = APNG_DISPOSE_OP_BACKGROUND; | |
| 1226 | } | ||
| 1227 | |||
| 1228 |
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|
262 | if (blend_op == APNG_BLEND_OP_OVER && !s->has_trns && ( |
| 1229 |
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|
4 | avctx->pix_fmt == AV_PIX_FMT_RGB24 || |
| 1230 |
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4 | avctx->pix_fmt == AV_PIX_FMT_RGB48BE || |
| 1231 |
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4 | avctx->pix_fmt == AV_PIX_FMT_GRAY8 || |
| 1232 |
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4 | avctx->pix_fmt == AV_PIX_FMT_GRAY16BE || |
| 1233 |
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|
4 | avctx->pix_fmt == AV_PIX_FMT_MONOBLACK |
| 1234 | )) { | ||
| 1235 | // APNG_BLEND_OP_OVER is the same as APNG_BLEND_OP_SOURCE when there is no alpha channel | ||
| 1236 | ✗ | blend_op = APNG_BLEND_OP_SOURCE; | |
| 1237 | } | ||
| 1238 | |||
| 1239 | 262 | s->cur_w = cur_w; | |
| 1240 | 262 | s->cur_h = cur_h; | |
| 1241 | 262 | s->x_offset = x_offset; | |
| 1242 | 262 | s->y_offset = y_offset; | |
| 1243 | 262 | s->dispose_op = dispose_op; | |
| 1244 | 262 | s->blend_op = blend_op; | |
| 1245 | |||
| 1246 | 262 | return 0; | |
| 1247 | } | ||
| 1248 | |||
| 1249 | ✗ | static void handle_p_frame_png(PNGDecContext *s, AVFrame *p) | |
| 1250 | { | ||
| 1251 | int i, j; | ||
| 1252 | ✗ | uint8_t *pd = p->data[0]; | |
| 1253 | ✗ | uint8_t *pd_last = s->last_picture.f->data[0]; | |
| 1254 | ✗ | int ls = av_image_get_linesize(p->format, s->width, 0); | |
| 1255 | |||
| 1256 | ✗ | ls = FFMIN(ls, s->width * s->bpp); | |
| 1257 | |||
| 1258 | ✗ | ff_progress_frame_await(&s->last_picture, INT_MAX); | |
| 1259 | ✗ | for (j = 0; j < s->height; j++) { | |
| 1260 | ✗ | for (i = 0; i < ls; i++) | |
| 1261 | ✗ | pd[i] += pd_last[i]; | |
| 1262 | ✗ | pd += p->linesize[0]; | |
| 1263 | ✗ | pd_last += s->last_picture.f->linesize[0]; | |
| 1264 | } | ||
| 1265 | ✗ | } | |
| 1266 | |||
| 1267 | // divide by 255 and round to nearest | ||
| 1268 | // apply a fast variant: (X+127)/255 = ((X+127)*257+257)>>16 = ((X+128)*257)>>16 | ||
| 1269 | #define FAST_DIV255(x) ((((x) + 128) * 257) >> 16) | ||
| 1270 | |||
| 1271 | 61 | static int handle_p_frame_apng(AVCodecContext *avctx, PNGDecContext *s, | |
| 1272 | AVFrame *p) | ||
| 1273 | { | ||
| 1274 | 61 | uint8_t *dst = p->data[0]; | |
| 1275 | 61 | ptrdiff_t dst_stride = p->linesize[0]; | |
| 1276 | 61 | const uint8_t *src = s->last_picture.f->data[0]; | |
| 1277 | 61 | ptrdiff_t src_stride = s->last_picture.f->linesize[0]; | |
| 1278 |
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|
61 | const int bpp = s->color_type == PNG_COLOR_TYPE_PALETTE ? 4 : s->bpp; |
| 1279 | |||
| 1280 | size_t x, y; | ||
| 1281 | |||
| 1282 |
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61 | if (s->blend_op == APNG_BLEND_OP_OVER && |
| 1283 |
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|
41 | avctx->pix_fmt != AV_PIX_FMT_RGBA && |
| 1284 | ✗ | avctx->pix_fmt != AV_PIX_FMT_GRAY8A) { | |
| 1285 | ✗ | avpriv_request_sample(avctx, "Blending with pixel format %s", | |
| 1286 | av_get_pix_fmt_name(avctx->pix_fmt)); | ||
| 1287 | ✗ | return AVERROR_PATCHWELCOME; | |
| 1288 | } | ||
| 1289 | |||
| 1290 | 61 | ff_progress_frame_await(&s->last_picture, INT_MAX); | |
| 1291 | |||
| 1292 | // copy unchanged rectangles from the last frame | ||
| 1293 |
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|
2247 | for (y = 0; y < s->y_offset; y++) |
| 1294 | 2186 | memcpy(dst + y * dst_stride, src + y * src_stride, p->width * bpp); | |
| 1295 |
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|
3381 | for (y = s->y_offset; y < s->y_offset + s->cur_h; y++) { |
| 1296 | 3320 | memcpy(dst + y * dst_stride, src + y * src_stride, s->x_offset * bpp); | |
| 1297 | 3320 | memcpy(dst + y * dst_stride + (s->x_offset + s->cur_w) * bpp, | |
| 1298 | 3320 | src + y * src_stride + (s->x_offset + s->cur_w) * bpp, | |
| 1299 | 3320 | (p->width - s->cur_w - s->x_offset) * bpp); | |
| 1300 | } | ||
| 1301 |
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|
2561 | for (y = s->y_offset + s->cur_h; y < p->height; y++) |
| 1302 | 2500 | memcpy(dst + y * dst_stride, src + y * src_stride, p->width * bpp); | |
| 1303 | |||
| 1304 |
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61 | if (s->blend_op == APNG_BLEND_OP_OVER) { |
| 1305 | // Perform blending | ||
| 1306 |
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|
1953 | for (y = s->y_offset; y < s->y_offset + s->cur_h; ++y) { |
| 1307 | 1912 | uint8_t *foreground = dst + dst_stride * y + bpp * s->x_offset; | |
| 1308 | 1912 | const uint8_t *background = src + src_stride * y + bpp * s->x_offset; | |
| 1309 |
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|
145177 | for (x = s->x_offset; x < s->x_offset + s->cur_w; ++x, foreground += bpp, background += bpp) { |
| 1310 | size_t b; | ||
| 1311 | uint8_t foreground_alpha, background_alpha, output_alpha; | ||
| 1312 | uint8_t output[10]; | ||
| 1313 | |||
| 1314 | // Since we might be blending alpha onto alpha, we use the following equations: | ||
| 1315 | // output_alpha = foreground_alpha + (1 - foreground_alpha) * background_alpha | ||
| 1316 | // output = (foreground_alpha * foreground + (1 - foreground_alpha) * background_alpha * background) / output_alpha | ||
| 1317 | |||
| 1318 |
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|
143265 | switch (avctx->pix_fmt) { |
| 1319 | 143265 | case AV_PIX_FMT_RGBA: | |
| 1320 | 143265 | foreground_alpha = foreground[3]; | |
| 1321 | 143265 | background_alpha = background[3]; | |
| 1322 | 143265 | break; | |
| 1323 | |||
| 1324 | ✗ | case AV_PIX_FMT_GRAY8A: | |
| 1325 | ✗ | foreground_alpha = foreground[1]; | |
| 1326 | ✗ | background_alpha = background[1]; | |
| 1327 | ✗ | break; | |
| 1328 | } | ||
| 1329 | |||
| 1330 |
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|
143265 | if (foreground_alpha == 255) |
| 1331 | 143265 | continue; | |
| 1332 | |||
| 1333 |
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|
121583 | if (foreground_alpha == 0) { |
| 1334 | 121583 | memcpy(foreground, background, bpp); | |
| 1335 | 121583 | continue; | |
| 1336 | } | ||
| 1337 | |||
| 1338 | ✗ | output_alpha = foreground_alpha + FAST_DIV255((255 - foreground_alpha) * background_alpha); | |
| 1339 | |||
| 1340 | ✗ | av_assert0(bpp <= 10); | |
| 1341 | |||
| 1342 | ✗ | for (b = 0; b < bpp - 1; ++b) { | |
| 1343 | ✗ | if (output_alpha == 0) { | |
| 1344 | ✗ | output[b] = 0; | |
| 1345 | ✗ | } else if (background_alpha == 255) { | |
| 1346 | ✗ | output[b] = FAST_DIV255(foreground_alpha * foreground[b] + (255 - foreground_alpha) * background[b]); | |
| 1347 | } else { | ||
| 1348 | ✗ | output[b] = (255 * foreground_alpha * foreground[b] + (255 - foreground_alpha) * background_alpha * background[b]) / (255 * output_alpha); | |
| 1349 | } | ||
| 1350 | } | ||
| 1351 | ✗ | output[b] = output_alpha; | |
| 1352 | ✗ | memcpy(foreground, output, bpp); | |
| 1353 | } | ||
| 1354 | } | ||
| 1355 | } | ||
| 1356 | |||
| 1357 | 61 | return 0; | |
| 1358 | } | ||
| 1359 | |||
| 1360 | 12 | static void apng_reset_background(PNGDecContext *s, const AVFrame *p) | |
| 1361 | { | ||
| 1362 | // need to reset a rectangle to black | ||
| 1363 | 12 | av_unused int ret = av_frame_copy(s->picture.f, p); | |
| 1364 |
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|
12 | const int bpp = s->color_type == PNG_COLOR_TYPE_PALETTE ? 4 : s->bpp; |
| 1365 | 12 | const ptrdiff_t dst_stride = s->picture.f->linesize[0]; | |
| 1366 | 12 | uint8_t *dst = s->picture.f->data[0] + s->y_offset * dst_stride + bpp * s->x_offset; | |
| 1367 | |||
| 1368 | av_assert1(ret >= 0); | ||
| 1369 | |||
| 1370 |
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|
971 | for (size_t y = 0; y < s->cur_h; y++) { |
| 1371 | 959 | memset(dst, 0, bpp * s->cur_w); | |
| 1372 | 959 | dst += dst_stride; | |
| 1373 | } | ||
| 1374 | 12 | } | |
| 1375 | |||
| 1376 | 675 | static int decode_frame_common(AVCodecContext *avctx, PNGDecContext *s, | |
| 1377 | AVFrame *p, const AVPacket *avpkt) | ||
| 1378 | { | ||
| 1379 | 675 | const AVCRC *crc_tab = av_crc_get_table(AV_CRC_32_IEEE_LE); | |
| 1380 | uint32_t tag, length; | ||
| 1381 | 675 | int decode_next_dat = 0; | |
| 1382 | int i, ret; | ||
| 1383 | |||
| 1384 | 17838 | for (;;) { | |
| 1385 | GetByteContext gb_chunk; | ||
| 1386 | |||
| 1387 | 18513 | length = bytestream2_get_bytes_left(&s->gb); | |
| 1388 |
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|
18513 | if (length <= 0) { |
| 1389 | |||
| 1390 |
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|
353 | if (avctx->codec_id == AV_CODEC_ID_PNG && |
| 1391 |
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|
75 | avctx->skip_frame == AVDISCARD_ALL) { |
| 1392 | 91 | return 0; | |
| 1393 | } | ||
| 1394 | |||
| 1395 |
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|
278 | if (CONFIG_APNG_DECODER && avctx->codec_id == AV_CODEC_ID_APNG && length == 0) { |
| 1396 |
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|
278 | if (!(s->pic_state & PNG_IDAT)) |
| 1397 | 16 | return 0; | |
| 1398 | else | ||
| 1399 | 583 | goto exit_loop; | |
| 1400 | } | ||
| 1401 | ✗ | av_log(avctx, AV_LOG_ERROR, "%d bytes left\n", length); | |
| 1402 | ✗ | if ( s->pic_state & PNG_ALLIMAGE | |
| 1403 | ✗ | && avctx->strict_std_compliance <= FF_COMPLIANCE_NORMAL) | |
| 1404 | ✗ | goto exit_loop; | |
| 1405 | ✗ | ret = AVERROR_INVALIDDATA; | |
| 1406 | 1 | goto fail; | |
| 1407 | } | ||
| 1408 | |||
| 1409 | 18160 | length = bytestream2_get_be32(&s->gb); | |
| 1410 |
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|
18160 | if (length > 0x7fffffff || length + 8 > bytestream2_get_bytes_left(&s->gb)) { |
| 1411 | 1 | av_log(avctx, AV_LOG_ERROR, "chunk too big\n"); | |
| 1412 | 1 | ret = AVERROR_INVALIDDATA; | |
| 1413 | 1 | goto fail; | |
| 1414 | } | ||
| 1415 |
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|
18159 | if (avctx->err_recognition & (AV_EF_CRCCHECK | AV_EF_IGNORE_ERR)) { |
| 1416 | ✗ | uint32_t crc_sig = AV_RB32(s->gb.buffer + length + 4); | |
| 1417 | ✗ | uint32_t crc_cal = ~av_crc(crc_tab, UINT32_MAX, s->gb.buffer, length + 4); | |
| 1418 | ✗ | if (crc_sig ^ crc_cal) { | |
| 1419 | ✗ | av_log(avctx, AV_LOG_ERROR, "CRC mismatch in chunk"); | |
| 1420 | ✗ | if (avctx->err_recognition & AV_EF_EXPLODE) { | |
| 1421 | ✗ | av_log(avctx, AV_LOG_ERROR, ", quitting\n"); | |
| 1422 | ✗ | ret = AVERROR_INVALIDDATA; | |
| 1423 | ✗ | goto fail; | |
| 1424 | } | ||
| 1425 | ✗ | av_log(avctx, AV_LOG_ERROR, ", skipping\n"); | |
| 1426 | ✗ | bytestream2_skip(&s->gb, length + 8); /* tag */ | |
| 1427 | 129 | continue; | |
| 1428 | } | ||
| 1429 | } | ||
| 1430 | 18159 | tag = bytestream2_get_le32(&s->gb); | |
| 1431 |
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|
18159 | if (avctx->debug & FF_DEBUG_STARTCODE) |
| 1432 | ✗ | av_log(avctx, AV_LOG_DEBUG, "png: tag=%s length=%u\n", | |
| 1433 | ✗ | av_fourcc2str(tag), length); | |
| 1434 | |||
| 1435 | 18159 | bytestream2_init(&gb_chunk, s->gb.buffer, length); | |
| 1436 | 18159 | bytestream2_skip(&s->gb, length + 4); | |
| 1437 | |||
| 1438 |
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|
18159 | if (avctx->codec_id == AV_CODEC_ID_PNG && |
| 1439 |
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|
14414 | avctx->skip_frame == AVDISCARD_ALL) { |
| 1440 |
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|
1440 | switch(tag) { |
| 1441 | 1311 | case MKTAG('I', 'H', 'D', 'R'): | |
| 1442 | case MKTAG('p', 'H', 'Y', 's'): | ||
| 1443 | case MKTAG('t', 'E', 'X', 't'): | ||
| 1444 | case MKTAG('I', 'D', 'A', 'T'): | ||
| 1445 | case MKTAG('t', 'R', 'N', 'S'): | ||
| 1446 | case MKTAG('s', 'R', 'G', 'B'): | ||
| 1447 | case MKTAG('c', 'I', 'C', 'P'): | ||
| 1448 | case MKTAG('c', 'H', 'R', 'M'): | ||
| 1449 | case MKTAG('g', 'A', 'M', 'A'): | ||
| 1450 | 1311 | break; | |
| 1451 | 129 | default: | |
| 1452 | 129 | continue; | |
| 1453 | } | ||
| 1454 | } | ||
| 1455 | |||
| 1456 |
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|
18030 | switch (tag) { |
| 1457 | 413 | case MKTAG('I', 'H', 'D', 'R'): | |
| 1458 |
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|
413 | if ((ret = decode_ihdr_chunk(avctx, s, &gb_chunk)) < 0) |
| 1459 | ✗ | goto fail; | |
| 1460 | 413 | break; | |
| 1461 | 380 | case MKTAG('p', 'H', 'Y', 's'): | |
| 1462 |
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|
380 | if ((ret = decode_phys_chunk(avctx, s, &gb_chunk)) < 0) |
| 1463 | ✗ | goto fail; | |
| 1464 | 380 | break; | |
| 1465 | 262 | case MKTAG('f', 'c', 'T', 'L'): | |
| 1466 |
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|
262 | if (!CONFIG_APNG_DECODER || avctx->codec_id != AV_CODEC_ID_APNG) |
| 1467 | ✗ | continue; | |
| 1468 |
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|
262 | if ((ret = decode_fctl_chunk(avctx, s, &gb_chunk)) < 0) |
| 1469 | ✗ | goto fail; | |
| 1470 | 262 | decode_next_dat = 1; | |
| 1471 | 262 | break; | |
| 1472 | 3120 | case MKTAG('f', 'd', 'A', 'T'): | |
| 1473 |
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|
3120 | if (!CONFIG_APNG_DECODER || avctx->codec_id != AV_CODEC_ID_APNG) |
| 1474 | ✗ | continue; | |
| 1475 |
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|
3120 | if (!decode_next_dat || bytestream2_get_bytes_left(&gb_chunk) < 4) { |
| 1476 | ✗ | ret = AVERROR_INVALIDDATA; | |
| 1477 | ✗ | goto fail; | |
| 1478 | } | ||
| 1479 | 3120 | bytestream2_get_be32(&gb_chunk); | |
| 1480 | /* fallthrough */ | ||
| 1481 | 16343 | case MKTAG('I', 'D', 'A', 'T'): | |
| 1482 |
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|
16343 | if (CONFIG_APNG_DECODER && avctx->codec_id == AV_CODEC_ID_APNG && !decode_next_dat) |
| 1483 | ✗ | continue; | |
| 1484 |
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|
16343 | if ((ret = decode_idat_chunk(avctx, s, &gb_chunk, p)) < 0) |
| 1485 | ✗ | goto fail; | |
| 1486 | 16343 | break; | |
| 1487 | 3 | case MKTAG('P', 'L', 'T', 'E'): | |
| 1488 | 3 | decode_plte_chunk(avctx, s, &gb_chunk); | |
| 1489 | 3 | break; | |
| 1490 | 7 | case MKTAG('t', 'R', 'N', 'S'): | |
| 1491 | 7 | decode_trns_chunk(avctx, s, &gb_chunk); | |
| 1492 | 7 | break; | |
| 1493 | 138 | case MKTAG('t', 'E', 'X', 't'): | |
| 1494 |
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|
138 | if (decode_text_chunk(s, &gb_chunk, 0) < 0) |
| 1495 | ✗ | av_log(avctx, AV_LOG_WARNING, "Broken tEXt chunk\n"); | |
| 1496 | 138 | break; | |
| 1497 | ✗ | case MKTAG('z', 'T', 'X', 't'): | |
| 1498 | ✗ | if (decode_text_chunk(s, &gb_chunk, 1) < 0) | |
| 1499 | ✗ | av_log(avctx, AV_LOG_WARNING, "Broken zTXt chunk\n"); | |
| 1500 | ✗ | break; | |
| 1501 | ✗ | case MKTAG('s', 'T', 'E', 'R'): { | |
| 1502 | ✗ | int mode = bytestream2_get_byte(&gb_chunk); | |
| 1503 | |||
| 1504 | ✗ | if (mode == 0 || mode == 1) { | |
| 1505 | ✗ | s->stereo_mode = mode; | |
| 1506 | } else { | ||
| 1507 | ✗ | av_log(avctx, AV_LOG_WARNING, | |
| 1508 | "Unknown value in sTER chunk (%d)\n", mode); | ||
| 1509 | } | ||
| 1510 | ✗ | break; | |
| 1511 | } | ||
| 1512 | ✗ | case MKTAG('c', 'I', 'C', 'P'): | |
| 1513 | ✗ | s->cicp_primaries = bytestream2_get_byte(&gb_chunk); | |
| 1514 | ✗ | s->cicp_trc = bytestream2_get_byte(&gb_chunk); | |
| 1515 | ✗ | if (bytestream2_get_byte(&gb_chunk) != 0) | |
| 1516 | ✗ | av_log(avctx, AV_LOG_WARNING, "nonzero cICP matrix\n"); | |
| 1517 | ✗ | s->cicp_range = bytestream2_get_byte(&gb_chunk); | |
| 1518 | ✗ | if (s->cicp_range != 0 && s->cicp_range != 1) | |
| 1519 | ✗ | av_log(avctx, AV_LOG_WARNING, "invalid cICP range: %d\n", s->cicp_range); | |
| 1520 | ✗ | s->have_cicp = 1; | |
| 1521 | ✗ | break; | |
| 1522 | 39 | case MKTAG('s', 'R', 'G', 'B'): | |
| 1523 | /* skip rendering intent byte */ | ||
| 1524 | 39 | bytestream2_skip(&gb_chunk, 1); | |
| 1525 | 39 | s->have_srgb = 1; | |
| 1526 | 39 | break; | |
| 1527 | 6 | case MKTAG('i', 'C', 'C', 'P'): { | |
| 1528 |
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✓ Branch 2 taken 6 times.
|
6 | if ((ret = decode_iccp_chunk(s, &gb_chunk)) < 0) |
| 1529 | ✗ | goto fail; | |
| 1530 | 6 | break; | |
| 1531 | } | ||
| 1532 | 12 | case MKTAG('c', 'H', 'R', 'M'): { | |
| 1533 | 12 | s->have_chrm = 1; | |
| 1534 | |||
| 1535 | 12 | s->white_point[0] = bytestream2_get_be32(&gb_chunk); | |
| 1536 | 12 | s->white_point[1] = bytestream2_get_be32(&gb_chunk); | |
| 1537 | |||
| 1538 | /* RGB Primaries */ | ||
| 1539 |
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|
48 | for (i = 0; i < 3; i++) { |
| 1540 | 36 | s->display_primaries[i][0] = bytestream2_get_be32(&gb_chunk); | |
| 1541 | 36 | s->display_primaries[i][1] = bytestream2_get_be32(&gb_chunk); | |
| 1542 | } | ||
| 1543 | |||
| 1544 | 12 | break; | |
| 1545 | } | ||
| 1546 | ✗ | case MKTAG('s', 'B', 'I', 'T'): | |
| 1547 | ✗ | if ((ret = decode_sbit_chunk(avctx, s, &gb_chunk)) < 0) | |
| 1548 | ✗ | goto fail; | |
| 1549 | ✗ | break; | |
| 1550 | 34 | case MKTAG('g', 'A', 'M', 'A'): { | |
| 1551 | AVBPrint bp; | ||
| 1552 | char *gamma_str; | ||
| 1553 | 34 | s->gamma = bytestream2_get_be32(&gb_chunk); | |
| 1554 | |||
| 1555 | 34 | av_bprint_init(&bp, 0, AV_BPRINT_SIZE_UNLIMITED); | |
| 1556 | 34 | av_bprintf(&bp, "%i/%i", s->gamma, 100000); | |
| 1557 | 34 | ret = av_bprint_finalize(&bp, &gamma_str); | |
| 1558 |
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|
34 | if (ret < 0) |
| 1559 | ✗ | return ret; | |
| 1560 | |||
| 1561 | 34 | av_dict_set(&s->frame_metadata, "gamma", gamma_str, AV_DICT_DONT_STRDUP_VAL); | |
| 1562 | |||
| 1563 | 34 | break; | |
| 1564 | } | ||
| 1565 | ✗ | case MKTAG('c', 'L', 'L', 'i'): | |
| 1566 | ✗ | if (bytestream2_get_bytes_left(&gb_chunk) != 8) { | |
| 1567 | ✗ | av_log(avctx, AV_LOG_WARNING, "Invalid cLLi chunk size: %d\n", bytestream2_get_bytes_left(&gb_chunk)); | |
| 1568 | ✗ | break; | |
| 1569 | } | ||
| 1570 | ✗ | s->have_clli = 1; | |
| 1571 | ✗ | s->clli_max = bytestream2_get_be32u(&gb_chunk); | |
| 1572 | ✗ | s->clli_avg = bytestream2_get_be32u(&gb_chunk); | |
| 1573 | ✗ | break; | |
| 1574 | ✗ | case MKTAG('m', 'D', 'V', 'c'): | |
| 1575 | ✗ | if (bytestream2_get_bytes_left(&gb_chunk) != 24) { | |
| 1576 | ✗ | av_log(avctx, AV_LOG_WARNING, "Invalid mDVc chunk size: %d\n", bytestream2_get_bytes_left(&gb_chunk)); | |
| 1577 | ✗ | break; | |
| 1578 | } | ||
| 1579 | ✗ | s->have_mdvc = 1; | |
| 1580 | ✗ | for (int i = 0; i < 3; i++) { | |
| 1581 | ✗ | s->mdvc_primaries[i][0] = bytestream2_get_be16u(&gb_chunk); | |
| 1582 | ✗ | s->mdvc_primaries[i][1] = bytestream2_get_be16u(&gb_chunk); | |
| 1583 | } | ||
| 1584 | ✗ | s->mdvc_white_point[0] = bytestream2_get_be16u(&gb_chunk); | |
| 1585 | ✗ | s->mdvc_white_point[1] = bytestream2_get_be16u(&gb_chunk); | |
| 1586 | ✗ | s->mdvc_max_lum = bytestream2_get_be32u(&gb_chunk); | |
| 1587 | ✗ | s->mdvc_min_lum = bytestream2_get_be32u(&gb_chunk); | |
| 1588 | ✗ | break; | |
| 1589 | 321 | case MKTAG('I', 'E', 'N', 'D'): | |
| 1590 |
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|
321 | if (!(s->pic_state & PNG_ALLIMAGE)) |
| 1591 | ✗ | av_log(avctx, AV_LOG_ERROR, "IEND without all image\n"); | |
| 1592 |
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|
321 | if (!(s->pic_state & (PNG_ALLIMAGE|PNG_IDAT))) { |
| 1593 | ✗ | ret = AVERROR_INVALIDDATA; | |
| 1594 | ✗ | goto fail; | |
| 1595 | } | ||
| 1596 | 321 | goto exit_loop; | |
| 1597 | } | ||
| 1598 | } | ||
| 1599 | 583 | exit_loop: | |
| 1600 | |||
| 1601 |
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|
583 | if (!p) |
| 1602 | ✗ | return AVERROR_INVALIDDATA; | |
| 1603 | |||
| 1604 |
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|
583 | if (avctx->codec_id == AV_CODEC_ID_PNG && |
| 1605 |
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|
321 | avctx->skip_frame == AVDISCARD_ALL) { |
| 1606 | ✗ | return 0; | |
| 1607 | } | ||
| 1608 | |||
| 1609 |
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|
583 | if (percent_missing(s) > avctx->discard_damaged_percentage) { |
| 1610 | ✗ | ret = AVERROR_INVALIDDATA; | |
| 1611 | ✗ | goto fail; | |
| 1612 | } | ||
| 1613 | |||
| 1614 |
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|
583 | if (s->bits_per_pixel <= 4) |
| 1615 | ✗ | handle_small_bpp(s, p); | |
| 1616 | |||
| 1617 |
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|
583 | if (s->color_type == PNG_COLOR_TYPE_PALETTE && avctx->codec_id == AV_CODEC_ID_APNG) { |
| 1618 |
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|
6342 | for (int y = 0; y < s->height; y++) { |
| 1619 | 6300 | uint8_t *row = &p->data[0][p->linesize[0] * y]; | |
| 1620 | |||
| 1621 |
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|
951300 | for (int x = s->width - 1; x >= 0; x--) { |
| 1622 | 945000 | const uint8_t idx = row[x]; | |
| 1623 | |||
| 1624 | 945000 | row[4*x+2] = s->palette[idx] & 0xFF; | |
| 1625 | 945000 | row[4*x+1] = (s->palette[idx] >> 8 ) & 0xFF; | |
| 1626 | 945000 | row[4*x+0] = (s->palette[idx] >> 16) & 0xFF; | |
| 1627 | 945000 | row[4*x+3] = s->palette[idx] >> 24; | |
| 1628 | } | ||
| 1629 | } | ||
| 1630 | } | ||
| 1631 | |||
| 1632 | /* apply transparency if needed */ | ||
| 1633 |
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|
583 | if (s->has_trns && s->color_type != PNG_COLOR_TYPE_PALETTE) { |
| 1634 |
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|
136 | size_t byte_depth = s->bit_depth > 8 ? 2 : 1; |
| 1635 | 136 | size_t raw_bpp = s->bpp - byte_depth; | |
| 1636 | ptrdiff_t x, y; | ||
| 1637 | |||
| 1638 |
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|
136 | av_assert0(s->bit_depth > 1); |
| 1639 | |||
| 1640 |
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|
17746 | for (y = 0; y < s->height; ++y) { |
| 1641 | 17610 | uint8_t *row = &p->data[0][p->linesize[0] * y]; | |
| 1642 | |||
| 1643 |
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|
17610 | if (s->bpp == 2 && byte_depth == 1) { |
| 1644 | ✗ | uint8_t *pixel = &row[2 * s->width - 1]; | |
| 1645 | ✗ | uint8_t *rowp = &row[1 * s->width - 1]; | |
| 1646 | ✗ | int tcolor = s->transparent_color_be[0]; | |
| 1647 | ✗ | for (x = s->width; x > 0; --x) { | |
| 1648 | ✗ | *pixel-- = *rowp == tcolor ? 0 : 0xff; | |
| 1649 | ✗ | *pixel-- = *rowp--; | |
| 1650 | } | ||
| 1651 |
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35220 | } else if (s->bpp == 4 && byte_depth == 1) { |
| 1652 | 17610 | uint8_t *pixel = &row[4 * s->width - 1]; | |
| 1653 | 17610 | uint8_t *rowp = &row[3 * s->width - 1]; | |
| 1654 | 17610 | int tcolor = AV_RL24(s->transparent_color_be); | |
| 1655 |
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1595310 | for (x = s->width; x > 0; --x) { |
| 1656 |
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|
1577700 | *pixel-- = AV_RL24(rowp-2) == tcolor ? 0 : 0xff; |
| 1657 | 1577700 | *pixel-- = *rowp--; | |
| 1658 | 1577700 | *pixel-- = *rowp--; | |
| 1659 | 1577700 | *pixel-- = *rowp--; | |
| 1660 | } | ||
| 1661 | } else { | ||
| 1662 | /* since we're updating in-place, we have to go from right to left */ | ||
| 1663 | ✗ | for (x = s->width; x > 0; --x) { | |
| 1664 | ✗ | uint8_t *pixel = &row[s->bpp * (x - 1)]; | |
| 1665 | ✗ | memmove(pixel, &row[raw_bpp * (x - 1)], raw_bpp); | |
| 1666 | |||
| 1667 | ✗ | if (!memcmp(pixel, s->transparent_color_be, raw_bpp)) { | |
| 1668 | ✗ | memset(&pixel[raw_bpp], 0, byte_depth); | |
| 1669 | } else { | ||
| 1670 | ✗ | memset(&pixel[raw_bpp], 0xff, byte_depth); | |
| 1671 | } | ||
| 1672 | } | ||
| 1673 | } | ||
| 1674 | } | ||
| 1675 | } | ||
| 1676 | |||
| 1677 | /* handle P-frames only if a predecessor frame is available */ | ||
| 1678 |
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|
583 | if (s->last_picture.f) { |
| 1679 |
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|
506 | if ( !(avpkt->flags & AV_PKT_FLAG_KEY) && avctx->codec_tag != AV_RL32("MPNG") |
| 1680 |
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|
61 | && s->last_picture.f->width == p->width |
| 1681 |
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|
61 | && s->last_picture.f->height== p->height |
| 1682 |
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61 | && s->last_picture.f->format== p->format |
| 1683 | ) { | ||
| 1684 |
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|
61 | if (CONFIG_PNG_DECODER && avctx->codec_id != AV_CODEC_ID_APNG) |
| 1685 | ✗ | handle_p_frame_png(s, p); | |
| 1686 | 61 | else if (CONFIG_APNG_DECODER && | |
| 1687 |
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|
122 | avctx->codec_id == AV_CODEC_ID_APNG && |
| 1688 | 61 | (ret = handle_p_frame_apng(avctx, s, p)) < 0) | |
| 1689 | ✗ | goto fail; | |
| 1690 | } | ||
| 1691 | } | ||
| 1692 |
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|
583 | if (CONFIG_APNG_DECODER && s->dispose_op == APNG_DISPOSE_OP_BACKGROUND) |
| 1693 | 12 | apng_reset_background(s, p); | |
| 1694 | |||
| 1695 | 583 | ret = 0; | |
| 1696 | 584 | fail: | |
| 1697 |
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|
584 | if (s->picture.f) |
| 1698 | 582 | ff_progress_frame_report(&s->picture, INT_MAX); | |
| 1699 | |||
| 1700 | 584 | return ret; | |
| 1701 | } | ||
| 1702 | |||
| 1703 | 659 | static void clear_frame_metadata(PNGDecContext *s) | |
| 1704 | { | ||
| 1705 | 659 | av_freep(&s->iccp_data); | |
| 1706 | 659 | s->iccp_data_len = 0; | |
| 1707 | 659 | s->iccp_name[0] = 0; | |
| 1708 | |||
| 1709 | 659 | s->stereo_mode = -1; | |
| 1710 | |||
| 1711 | 659 | s->have_chrm = 0; | |
| 1712 | 659 | s->have_srgb = 0; | |
| 1713 | 659 | s->have_cicp = 0; | |
| 1714 | |||
| 1715 | 659 | av_dict_free(&s->frame_metadata); | |
| 1716 | 659 | } | |
| 1717 | |||
| 1718 | 583 | static int output_frame(PNGDecContext *s, AVFrame *f) | |
| 1719 | { | ||
| 1720 | int ret; | ||
| 1721 | |||
| 1722 |
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|
583 | if (s->stereo_mode >= 0) { |
| 1723 | ✗ | AVStereo3D *stereo3d = av_stereo3d_create_side_data(f); | |
| 1724 | ✗ | if (!stereo3d) { | |
| 1725 | ✗ | ret = AVERROR(ENOMEM); | |
| 1726 | ✗ | goto fail; | |
| 1727 | } | ||
| 1728 | |||
| 1729 | ✗ | stereo3d->type = AV_STEREO3D_SIDEBYSIDE; | |
| 1730 | ✗ | stereo3d->flags = s->stereo_mode ? 0 : AV_STEREO3D_FLAG_INVERT; | |
| 1731 | } | ||
| 1732 | |||
| 1733 | 583 | FFSWAP(AVDictionary*, f->metadata, s->frame_metadata); | |
| 1734 | |||
| 1735 | 583 | return 0; | |
| 1736 | ✗ | fail: | |
| 1737 | ✗ | av_frame_unref(f); | |
| 1738 | ✗ | return ret; | |
| 1739 | } | ||
| 1740 | |||
| 1741 | #if CONFIG_PNG_DECODER | ||
| 1742 | 397 | static int decode_frame_png(AVCodecContext *avctx, AVFrame *p, | |
| 1743 | int *got_frame, AVPacket *avpkt) | ||
| 1744 | { | ||
| 1745 | 397 | PNGDecContext *const s = avctx->priv_data; | |
| 1746 | 397 | const uint8_t *buf = avpkt->data; | |
| 1747 | 397 | int buf_size = avpkt->size; | |
| 1748 | int64_t sig; | ||
| 1749 | int ret; | ||
| 1750 | |||
| 1751 | 397 | clear_frame_metadata(s); | |
| 1752 | |||
| 1753 | 397 | bytestream2_init(&s->gb, buf, buf_size); | |
| 1754 | |||
| 1755 | /* check signature */ | ||
| 1756 | 397 | sig = bytestream2_get_be64(&s->gb); | |
| 1757 |
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|
397 | if (sig != PNGSIG && |
| 1758 | sig != MNGSIG) { | ||
| 1759 | ✗ | av_log(avctx, AV_LOG_ERROR, "Invalid PNG signature 0x%08"PRIX64".\n", sig); | |
| 1760 | ✗ | return AVERROR_INVALIDDATA; | |
| 1761 | } | ||
| 1762 | |||
| 1763 | 397 | s->y = s->has_trns = 0; | |
| 1764 | 397 | s->hdr_state = 0; | |
| 1765 | 397 | s->pic_state = 0; | |
| 1766 | |||
| 1767 | /* Reset z_stream */ | ||
| 1768 | 397 | ret = inflateReset(&s->zstream.zstream); | |
| 1769 |
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|
397 | if (ret != Z_OK) |
| 1770 | ✗ | return AVERROR_EXTERNAL; | |
| 1771 | |||
| 1772 |
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|
397 | if ((ret = decode_frame_common(avctx, s, p, avpkt)) < 0) |
| 1773 | 1 | goto the_end; | |
| 1774 | |||
| 1775 |
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|
396 | if (avctx->skip_frame == AVDISCARD_ALL) { |
| 1776 | 75 | *got_frame = 0; | |
| 1777 | 75 | ret = bytestream2_tell(&s->gb); | |
| 1778 | 75 | goto the_end; | |
| 1779 | } | ||
| 1780 | |||
| 1781 | 321 | ret = output_frame(s, p); | |
| 1782 |
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|
321 | if (ret < 0) |
| 1783 | ✗ | goto the_end; | |
| 1784 | |||
| 1785 |
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|
321 | if (!(avctx->active_thread_type & FF_THREAD_FRAME)) { |
| 1786 | 321 | ff_progress_frame_unref(&s->last_picture); | |
| 1787 | 321 | FFSWAP(ProgressFrame, s->picture, s->last_picture); | |
| 1788 | } | ||
| 1789 | |||
| 1790 | 321 | *got_frame = 1; | |
| 1791 | |||
| 1792 | 321 | ret = bytestream2_tell(&s->gb); | |
| 1793 | 397 | the_end: | |
| 1794 | 397 | s->crow_buf = NULL; | |
| 1795 | 397 | return ret; | |
| 1796 | } | ||
| 1797 | #endif | ||
| 1798 | |||
| 1799 | #if CONFIG_APNG_DECODER | ||
| 1800 | 262 | static int decode_frame_apng(AVCodecContext *avctx, AVFrame *p, | |
| 1801 | int *got_frame, AVPacket *avpkt) | ||
| 1802 | { | ||
| 1803 | 262 | PNGDecContext *const s = avctx->priv_data; | |
| 1804 | int ret; | ||
| 1805 | |||
| 1806 | 262 | clear_frame_metadata(s); | |
| 1807 | |||
| 1808 |
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|
262 | if (!(s->hdr_state & PNG_IHDR)) { |
| 1809 |
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16 | if (!avctx->extradata_size) |
| 1810 | ✗ | return AVERROR_INVALIDDATA; | |
| 1811 | |||
| 1812 |
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|
16 | if ((ret = inflateReset(&s->zstream.zstream)) != Z_OK) |
| 1813 | ✗ | return AVERROR_EXTERNAL; | |
| 1814 | 16 | bytestream2_init(&s->gb, avctx->extradata, avctx->extradata_size); | |
| 1815 |
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|
16 | if ((ret = decode_frame_common(avctx, s, NULL, avpkt)) < 0) |
| 1816 | ✗ | return ret; | |
| 1817 | } | ||
| 1818 | |||
| 1819 | /* reset state for a new frame */ | ||
| 1820 |
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|
262 | if ((ret = inflateReset(&s->zstream.zstream)) != Z_OK) |
| 1821 | ✗ | return AVERROR_EXTERNAL; | |
| 1822 | 262 | s->y = 0; | |
| 1823 | 262 | s->pic_state = 0; | |
| 1824 | 262 | bytestream2_init(&s->gb, avpkt->data, avpkt->size); | |
| 1825 |
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|
262 | if ((ret = decode_frame_common(avctx, s, p, avpkt)) < 0) |
| 1826 | ✗ | return ret; | |
| 1827 | |||
| 1828 |
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|
262 | if (!(s->pic_state & PNG_ALLIMAGE)) |
| 1829 | ✗ | av_log(avctx, AV_LOG_WARNING, "Frame did not contain a complete image\n"); | |
| 1830 |
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|
262 | if (!(s->pic_state & (PNG_ALLIMAGE|PNG_IDAT))) |
| 1831 | ✗ | return AVERROR_INVALIDDATA; | |
| 1832 | |||
| 1833 | 262 | ret = output_frame(s, p); | |
| 1834 |
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262 | if (ret < 0) |
| 1835 | ✗ | return ret; | |
| 1836 | |||
| 1837 |
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262 | if (!(avctx->active_thread_type & FF_THREAD_FRAME)) { |
| 1838 |
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|
262 | if (s->dispose_op != APNG_DISPOSE_OP_PREVIOUS) |
| 1839 | 261 | FFSWAP(ProgressFrame, s->picture, s->last_picture); | |
| 1840 | 262 | ff_progress_frame_unref(&s->picture); | |
| 1841 | } | ||
| 1842 | |||
| 1843 | 262 | *got_frame = 1; | |
| 1844 | 262 | return bytestream2_tell(&s->gb); | |
| 1845 | } | ||
| 1846 | #endif | ||
| 1847 | |||
| 1848 | #if HAVE_THREADS | ||
| 1849 | ✗ | static int update_thread_context(AVCodecContext *dst, const AVCodecContext *src) | |
| 1850 | { | ||
| 1851 | ✗ | PNGDecContext *psrc = src->priv_data; | |
| 1852 | ✗ | PNGDecContext *pdst = dst->priv_data; | |
| 1853 | const ProgressFrame *src_frame; | ||
| 1854 | |||
| 1855 | ✗ | if (dst == src) | |
| 1856 | ✗ | return 0; | |
| 1857 | |||
| 1858 | ✗ | if (CONFIG_APNG_DECODER && dst->codec_id == AV_CODEC_ID_APNG) { | |
| 1859 | |||
| 1860 | ✗ | pdst->width = psrc->width; | |
| 1861 | ✗ | pdst->height = psrc->height; | |
| 1862 | ✗ | pdst->bit_depth = psrc->bit_depth; | |
| 1863 | ✗ | pdst->color_type = psrc->color_type; | |
| 1864 | ✗ | pdst->compression_type = psrc->compression_type; | |
| 1865 | ✗ | pdst->interlace_type = psrc->interlace_type; | |
| 1866 | ✗ | pdst->filter_type = psrc->filter_type; | |
| 1867 | ✗ | pdst->has_trns = psrc->has_trns; | |
| 1868 | ✗ | memcpy(pdst->transparent_color_be, psrc->transparent_color_be, sizeof(pdst->transparent_color_be)); | |
| 1869 | |||
| 1870 | ✗ | memcpy(pdst->palette, psrc->palette, sizeof(pdst->palette)); | |
| 1871 | |||
| 1872 | ✗ | pdst->hdr_state |= psrc->hdr_state; | |
| 1873 | } | ||
| 1874 | |||
| 1875 | ✗ | src_frame = psrc->dispose_op == APNG_DISPOSE_OP_PREVIOUS ? | |
| 1876 | &psrc->last_picture : &psrc->picture; | ||
| 1877 | |||
| 1878 | ✗ | ff_progress_frame_replace(&pdst->last_picture, src_frame); | |
| 1879 | |||
| 1880 | ✗ | return 0; | |
| 1881 | } | ||
| 1882 | #endif | ||
| 1883 | |||
| 1884 | 157 | static av_cold int png_dec_init(AVCodecContext *avctx) | |
| 1885 | { | ||
| 1886 | 157 | PNGDecContext *s = avctx->priv_data; | |
| 1887 | |||
| 1888 | 157 | s->avctx = avctx; | |
| 1889 | |||
| 1890 | 157 | ff_pngdsp_init(&s->dsp); | |
| 1891 | |||
| 1892 | 157 | return ff_inflate_init(&s->zstream, avctx); | |
| 1893 | } | ||
| 1894 | |||
| 1895 | 157 | static av_cold int png_dec_end(AVCodecContext *avctx) | |
| 1896 | { | ||
| 1897 | 157 | PNGDecContext *s = avctx->priv_data; | |
| 1898 | |||
| 1899 | 157 | ff_progress_frame_unref(&s->last_picture); | |
| 1900 | 157 | ff_progress_frame_unref(&s->picture); | |
| 1901 | 157 | av_freep(&s->buffer); | |
| 1902 | 157 | s->buffer_size = 0; | |
| 1903 | 157 | av_freep(&s->last_row); | |
| 1904 | 157 | s->last_row_size = 0; | |
| 1905 | 157 | av_freep(&s->tmp_row); | |
| 1906 | 157 | s->tmp_row_size = 0; | |
| 1907 | |||
| 1908 | 157 | av_freep(&s->iccp_data); | |
| 1909 | 157 | av_dict_free(&s->frame_metadata); | |
| 1910 | 157 | ff_inflate_end(&s->zstream); | |
| 1911 | |||
| 1912 | 157 | return 0; | |
| 1913 | } | ||
| 1914 | |||
| 1915 | #if CONFIG_APNG_DECODER | ||
| 1916 | const FFCodec ff_apng_decoder = { | ||
| 1917 | .p.name = "apng", | ||
| 1918 | CODEC_LONG_NAME("APNG (Animated Portable Network Graphics) image"), | ||
| 1919 | .p.type = AVMEDIA_TYPE_VIDEO, | ||
| 1920 | .p.id = AV_CODEC_ID_APNG, | ||
| 1921 | .priv_data_size = sizeof(PNGDecContext), | ||
| 1922 | .init = png_dec_init, | ||
| 1923 | .close = png_dec_end, | ||
| 1924 | FF_CODEC_DECODE_CB(decode_frame_apng), | ||
| 1925 | UPDATE_THREAD_CONTEXT(update_thread_context), | ||
| 1926 | .p.capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_FRAME_THREADS, | ||
| 1927 | .caps_internal = FF_CODEC_CAP_INIT_CLEANUP | | ||
| 1928 | FF_CODEC_CAP_USES_PROGRESSFRAMES | | ||
| 1929 | FF_CODEC_CAP_ICC_PROFILES, | ||
| 1930 | }; | ||
| 1931 | #endif | ||
| 1932 | |||
| 1933 | #if CONFIG_PNG_DECODER | ||
| 1934 | const FFCodec ff_png_decoder = { | ||
| 1935 | .p.name = "png", | ||
| 1936 | CODEC_LONG_NAME("PNG (Portable Network Graphics) image"), | ||
| 1937 | .p.type = AVMEDIA_TYPE_VIDEO, | ||
| 1938 | .p.id = AV_CODEC_ID_PNG, | ||
| 1939 | .priv_data_size = sizeof(PNGDecContext), | ||
| 1940 | .init = png_dec_init, | ||
| 1941 | .close = png_dec_end, | ||
| 1942 | FF_CODEC_DECODE_CB(decode_frame_png), | ||
| 1943 | UPDATE_THREAD_CONTEXT(update_thread_context), | ||
| 1944 | .p.capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_FRAME_THREADS, | ||
| 1945 | .caps_internal = FF_CODEC_CAP_SKIP_FRAME_FILL_PARAM | | ||
| 1946 | FF_CODEC_CAP_INIT_CLEANUP | | ||
| 1947 | FF_CODEC_CAP_USES_PROGRESSFRAMES | | ||
| 1948 | FF_CODEC_CAP_ICC_PROFILES, | ||
| 1949 | }; | ||
| 1950 | #endif | ||
| 1951 |