Directory: | ../../../ffmpeg/ |
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File: | src/libavcodec/pngdec.c |
Date: | 2022-07-07 01:21:54 |
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Lines: | 638 | 992 | 64.3% |
Branches: | 414 | 735 | 56.3% |
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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/imgutils.h" | ||
30 | #include "libavutil/intreadwrite.h" | ||
31 | #include "libavutil/stereo3d.h" | ||
32 | #include "libavutil/mastering_display_metadata.h" | ||
33 | |||
34 | #include "avcodec.h" | ||
35 | #include "bytestream.h" | ||
36 | #include "codec_internal.h" | ||
37 | #include "internal.h" | ||
38 | #include "apng.h" | ||
39 | #include "png.h" | ||
40 | #include "pngdsp.h" | ||
41 | #include "thread.h" | ||
42 | #include "threadframe.h" | ||
43 | #include "zlib_wrapper.h" | ||
44 | |||
45 | #include <zlib.h> | ||
46 | |||
47 | enum PNGHeaderState { | ||
48 | PNG_IHDR = 1 << 0, | ||
49 | PNG_PLTE = 1 << 1, | ||
50 | }; | ||
51 | |||
52 | enum PNGImageState { | ||
53 | PNG_IDAT = 1 << 0, | ||
54 | PNG_ALLIMAGE = 1 << 1, | ||
55 | }; | ||
56 | |||
57 | typedef struct PNGDecContext { | ||
58 | PNGDSPContext dsp; | ||
59 | AVCodecContext *avctx; | ||
60 | |||
61 | GetByteContext gb; | ||
62 | ThreadFrame last_picture; | ||
63 | ThreadFrame picture; | ||
64 | |||
65 | AVDictionary *frame_metadata; | ||
66 | |||
67 | uint8_t iccp_name[82]; | ||
68 | uint8_t *iccp_data; | ||
69 | size_t iccp_data_len; | ||
70 | |||
71 | int stereo_mode; | ||
72 | |||
73 | int have_chrm; | ||
74 | uint32_t white_point[2]; | ||
75 | uint32_t display_primaries[3][2]; | ||
76 | |||
77 | enum PNGHeaderState hdr_state; | ||
78 | enum PNGImageState pic_state; | ||
79 | int width, height; | ||
80 | int cur_w, cur_h; | ||
81 | int last_w, last_h; | ||
82 | int x_offset, y_offset; | ||
83 | int last_x_offset, last_y_offset; | ||
84 | uint8_t dispose_op, blend_op; | ||
85 | uint8_t last_dispose_op; | ||
86 | int bit_depth; | ||
87 | int color_type; | ||
88 | int compression_type; | ||
89 | int interlace_type; | ||
90 | int filter_type; | ||
91 | int channels; | ||
92 | int bits_per_pixel; | ||
93 | int bpp; | ||
94 | int has_trns; | ||
95 | uint8_t transparent_color_be[6]; | ||
96 | |||
97 | uint8_t *background_buf; | ||
98 | unsigned background_buf_allocated; | ||
99 | uint32_t palette[256]; | ||
100 | uint8_t *crow_buf; | ||
101 | uint8_t *last_row; | ||
102 | unsigned int last_row_size; | ||
103 | uint8_t *tmp_row; | ||
104 | unsigned int tmp_row_size; | ||
105 | uint8_t *buffer; | ||
106 | int buffer_size; | ||
107 | int pass; | ||
108 | int crow_size; /* compressed row size (include filter type) */ | ||
109 | int row_size; /* decompressed row size */ | ||
110 | int pass_row_size; /* decompress row size of the current pass */ | ||
111 | int y; | ||
112 | FFZStream zstream; | ||
113 | } PNGDecContext; | ||
114 | |||
115 | /* Mask to determine which pixels are valid in a pass */ | ||
116 | static const uint8_t png_pass_mask[NB_PASSES] = { | ||
117 | 0x01, 0x01, 0x11, 0x11, 0x55, 0x55, 0xff, | ||
118 | }; | ||
119 | |||
120 | /* Mask to determine which y pixels can be written in a pass */ | ||
121 | static const uint8_t png_pass_dsp_ymask[NB_PASSES] = { | ||
122 | 0xff, 0xff, 0x0f, 0xff, 0x33, 0xff, 0x55, | ||
123 | }; | ||
124 | |||
125 | /* Mask to determine which pixels to overwrite while displaying */ | ||
126 | static const uint8_t png_pass_dsp_mask[NB_PASSES] = { | ||
127 | 0xff, 0x0f, 0xff, 0x33, 0xff, 0x55, 0xff | ||
128 | }; | ||
129 | |||
130 | /* NOTE: we try to construct a good looking image at each pass. width | ||
131 | * is the original image width. We also do pixel format conversion at | ||
132 | * this stage */ | ||
133 | 5632 | static void png_put_interlaced_row(uint8_t *dst, int width, | |
134 | int bits_per_pixel, int pass, | ||
135 | int color_type, const uint8_t *src) | ||
136 | { | ||
137 | int x, mask, dsp_mask, j, src_x, b, bpp; | ||
138 | uint8_t *d; | ||
139 | const uint8_t *s; | ||
140 | |||
141 | 5632 | mask = png_pass_mask[pass]; | |
142 | 5632 | dsp_mask = png_pass_dsp_mask[pass]; | |
143 | |||
144 |
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5632 | switch (bits_per_pixel) { |
145 | ✗ | case 1: | |
146 | ✗ | src_x = 0; | |
147 | ✗ | for (x = 0; x < width; x++) { | |
148 | ✗ | j = (x & 7); | |
149 | ✗ | if ((dsp_mask << j) & 0x80) { | |
150 | ✗ | b = (src[src_x >> 3] >> (7 - (src_x & 7))) & 1; | |
151 | ✗ | dst[x >> 3] &= 0xFF7F>>j; | |
152 | ✗ | dst[x >> 3] |= b << (7 - j); | |
153 | } | ||
154 | ✗ | if ((mask << j) & 0x80) | |
155 | ✗ | src_x++; | |
156 | } | ||
157 | ✗ | break; | |
158 | ✗ | case 2: | |
159 | ✗ | src_x = 0; | |
160 | ✗ | for (x = 0; x < width; x++) { | |
161 | ✗ | int j2 = 2 * (x & 3); | |
162 | ✗ | j = (x & 7); | |
163 | ✗ | if ((dsp_mask << j) & 0x80) { | |
164 | ✗ | b = (src[src_x >> 2] >> (6 - 2*(src_x & 3))) & 3; | |
165 | ✗ | dst[x >> 2] &= 0xFF3F>>j2; | |
166 | ✗ | dst[x >> 2] |= b << (6 - j2); | |
167 | } | ||
168 | ✗ | if ((mask << j) & 0x80) | |
169 | ✗ | src_x++; | |
170 | } | ||
171 | ✗ | break; | |
172 | ✗ | case 4: | |
173 | ✗ | src_x = 0; | |
174 | ✗ | for (x = 0; x < width; x++) { | |
175 | ✗ | int j2 = 4*(x&1); | |
176 | ✗ | j = (x & 7); | |
177 | ✗ | if ((dsp_mask << j) & 0x80) { | |
178 | ✗ | b = (src[src_x >> 1] >> (4 - 4*(src_x & 1))) & 15; | |
179 | ✗ | dst[x >> 1] &= 0xFF0F>>j2; | |
180 | ✗ | dst[x >> 1] |= b << (4 - j2); | |
181 | } | ||
182 | ✗ | if ((mask << j) & 0x80) | |
183 | ✗ | src_x++; | |
184 | } | ||
185 | ✗ | break; | |
186 | 5632 | default: | |
187 | 5632 | bpp = bits_per_pixel >> 3; | |
188 | 5632 | d = dst; | |
189 | 5632 | s = src; | |
190 |
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726528 | for (x = 0; x < width; x++) { |
191 | 720896 | j = x & 7; | |
192 |
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720896 | if ((dsp_mask << j) & 0x80) { |
193 | 524288 | memcpy(d, s, bpp); | |
194 | } | ||
195 | 720896 | d += bpp; | |
196 |
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720896 | if ((mask << j) & 0x80) |
197 | 245760 | s += bpp; | |
198 | } | ||
199 | 5632 | break; | |
200 | } | ||
201 | 5632 | } | |
202 | |||
203 | 53777 | void ff_add_png_paeth_prediction(uint8_t *dst, uint8_t *src, uint8_t *top, | |
204 | int w, int bpp) | ||
205 | { | ||
206 | int i; | ||
207 |
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13012408 | for (i = 0; i < w; i++) { |
208 | int a, b, c, p, pa, pb, pc; | ||
209 | |||
210 | 12958631 | a = dst[i - bpp]; | |
211 | 12958631 | b = top[i]; | |
212 | 12958631 | c = top[i - bpp]; | |
213 | |||
214 | 12958631 | p = b - c; | |
215 | 12958631 | pc = a - c; | |
216 | |||
217 | 12958631 | pa = abs(p); | |
218 | 12958631 | pb = abs(pc); | |
219 | 12958631 | pc = abs(p + pc); | |
220 | |||
221 |
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12958631 | if (pa <= pb && pa <= pc) |
222 | 7412790 | p = a; | |
223 |
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5545841 | else if (pb <= pc) |
224 | 4527118 | p = b; | |
225 | else | ||
226 | 1018723 | p = c; | |
227 | 12958631 | dst[i] = p + src[i]; | |
228 | } | ||
229 | 53777 | } | |
230 | |||
231 | #define UNROLL1(bpp, op) \ | ||
232 | { \ | ||
233 | r = dst[0]; \ | ||
234 | if (bpp >= 2) \ | ||
235 | g = dst[1]; \ | ||
236 | if (bpp >= 3) \ | ||
237 | b = dst[2]; \ | ||
238 | if (bpp >= 4) \ | ||
239 | a = dst[3]; \ | ||
240 | for (; i <= size - bpp; i += bpp) { \ | ||
241 | dst[i + 0] = r = op(r, src[i + 0], last[i + 0]); \ | ||
242 | if (bpp == 1) \ | ||
243 | continue; \ | ||
244 | dst[i + 1] = g = op(g, src[i + 1], last[i + 1]); \ | ||
245 | if (bpp == 2) \ | ||
246 | continue; \ | ||
247 | dst[i + 2] = b = op(b, src[i + 2], last[i + 2]); \ | ||
248 | if (bpp == 3) \ | ||
249 | continue; \ | ||
250 | dst[i + 3] = a = op(a, src[i + 3], last[i + 3]); \ | ||
251 | } \ | ||
252 | } | ||
253 | |||
254 | #define UNROLL_FILTER(op) \ | ||
255 | if (bpp == 1) { \ | ||
256 | UNROLL1(1, op) \ | ||
257 | } else if (bpp == 2) { \ | ||
258 | UNROLL1(2, op) \ | ||
259 | } else if (bpp == 3) { \ | ||
260 | UNROLL1(3, op) \ | ||
261 | } else if (bpp == 4) { \ | ||
262 | UNROLL1(4, op) \ | ||
263 | } \ | ||
264 | for (; i < size; i++) { \ | ||
265 | dst[i] = op(dst[i - bpp], src[i], last[i]); \ | ||
266 | } | ||
267 | |||
268 | /* NOTE: 'dst' can be equal to 'last' */ | ||
269 | 127288 | void ff_png_filter_row(PNGDSPContext *dsp, uint8_t *dst, int filter_type, | |
270 | uint8_t *src, uint8_t *last, int size, int bpp) | ||
271 | { | ||
272 | int i, p, r, g, b, a; | ||
273 | |||
274 |
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127288 | switch (filter_type) { |
275 | 82172 | case PNG_FILTER_VALUE_NONE: | |
276 | 82172 | memcpy(dst, src, size); | |
277 | 82172 | break; | |
278 | 4413 | case PNG_FILTER_VALUE_SUB: | |
279 |
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20337 | for (i = 0; i < bpp; i++) |
280 | 15924 | dst[i] = src[i]; | |
281 |
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4413 | if (bpp == 4) { |
282 | 2655 | p = *(int *)dst; | |
283 |
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411180 | for (; i < size; i += bpp) { |
284 | 408525 | unsigned s = *(int *)(src + i); | |
285 | 408525 | p = ((s & 0x7f7f7f7f) + (p & 0x7f7f7f7f)) ^ ((s ^ p) & 0x80808080); | |
286 | 408525 | *(int *)(dst + i) = p; | |
287 | } | ||
288 | } else { | ||
289 | #define OP_SUB(x, s, l) ((x) + (s)) | ||
290 |
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328835 | UNROLL_FILTER(OP_SUB); |
291 | } | ||
292 | 4413 | break; | |
293 | 11044 | case PNG_FILTER_VALUE_UP: | |
294 | 11044 | dsp->add_bytes_l2(dst, src, last, size); | |
295 | 11044 | break; | |
296 | 2626 | case PNG_FILTER_VALUE_AVG: | |
297 |
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11162 | for (i = 0; i < bpp; i++) { |
298 | 8536 | p = (last[i] >> 1); | |
299 | 8536 | dst[i] = p + src[i]; | |
300 | } | ||
301 | #define OP_AVG(x, s, l) (((((x) + (l)) >> 1) + (s)) & 0xff) | ||
302 |
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361790 | UNROLL_FILTER(OP_AVG); |
303 | 2626 | break; | |
304 | 27033 | case PNG_FILTER_VALUE_PAETH: | |
305 |
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111113 | for (i = 0; i < bpp; i++) { |
306 | 84080 | p = last[i]; | |
307 | 84080 | dst[i] = p + src[i]; | |
308 | } | ||
309 |
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27033 | if (bpp > 2 && size > 4) { |
310 | /* would write off the end of the array if we let it process | ||
311 | * the last pixel with bpp=3 */ | ||
312 |
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26963 | int w = (bpp & 3) ? size - 3 : size; |
313 | |||
314 |
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26963 | if (w > i) { |
315 | 26963 | dsp->add_paeth_prediction(dst + i, src + i, last + i, size - i, bpp); | |
316 | 26963 | i = w; | |
317 | } | ||
318 | } | ||
319 | 27033 | ff_add_png_paeth_prediction(dst + i, src + i, last + i, size - i, bpp); | |
320 | 27033 | break; | |
321 | } | ||
322 | 127288 | } | |
323 | |||
324 | /* This used to be called "deloco" in FFmpeg | ||
325 | * and is actually an inverse reversible colorspace transformation */ | ||
326 | #define YUV2RGB(NAME, TYPE) \ | ||
327 | static void deloco_ ## NAME(TYPE *dst, int size, int alpha) \ | ||
328 | { \ | ||
329 | int i; \ | ||
330 | for (i = 0; i < size; i += 3 + alpha) { \ | ||
331 | int g = dst [i + 1]; \ | ||
332 | dst[i + 0] += g; \ | ||
333 | dst[i + 2] += g; \ | ||
334 | } \ | ||
335 | } | ||
336 | |||
337 | ✗ | YUV2RGB(rgb8, uint8_t) | |
338 | ✗ | YUV2RGB(rgb16, uint16_t) | |
339 | |||
340 | 583 | static int percent_missing(PNGDecContext *s) | |
341 | { | ||
342 |
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583 | if (s->interlace_type) { |
343 | 4 | return 100 - 100 * s->pass / (NB_PASSES - 1); | |
344 | } else { | ||
345 | 579 | return 100 - 100 * s->y / s->cur_h; | |
346 | } | ||
347 | } | ||
348 | |||
349 | /* process exactly one decompressed row */ | ||
350 | 123047 | static void png_handle_row(PNGDecContext *s, uint8_t *dst, ptrdiff_t dst_stride) | |
351 | { | ||
352 | uint8_t *ptr, *last_row; | ||
353 | int got_line; | ||
354 | |||
355 |
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123047 | if (!s->interlace_type) { |
356 | 121127 | ptr = dst + dst_stride * (s->y + s->y_offset) + s->x_offset * s->bpp; | |
357 |
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121127 | if (s->y == 0) |
358 | 649 | last_row = s->last_row; | |
359 | else | ||
360 | 120478 | last_row = ptr - dst_stride; | |
361 | |||
362 | 121127 | ff_png_filter_row(&s->dsp, ptr, s->crow_buf[0], s->crow_buf + 1, | |
363 | last_row, s->row_size, s->bpp); | ||
364 | /* loco lags by 1 row so that it doesn't interfere with top prediction */ | ||
365 |
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121127 | if (s->filter_type == PNG_FILTER_TYPE_LOCO && s->y > 0) { |
366 | ✗ | if (s->bit_depth == 16) { | |
367 | ✗ | deloco_rgb16((uint16_t *)(ptr - dst_stride), s->row_size / 2, | |
368 | ✗ | s->color_type == PNG_COLOR_TYPE_RGB_ALPHA); | |
369 | } else { | ||
370 | ✗ | deloco_rgb8(ptr - dst_stride, s->row_size, | |
371 | ✗ | s->color_type == PNG_COLOR_TYPE_RGB_ALPHA); | |
372 | } | ||
373 | } | ||
374 | 121127 | s->y++; | |
375 |
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121127 | if (s->y == s->cur_h) { |
376 | 649 | s->pic_state |= PNG_ALLIMAGE; | |
377 |
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649 | if (s->filter_type == PNG_FILTER_TYPE_LOCO) { |
378 | ✗ | if (s->bit_depth == 16) { | |
379 | ✗ | deloco_rgb16((uint16_t *)ptr, s->row_size / 2, | |
380 | ✗ | s->color_type == PNG_COLOR_TYPE_RGB_ALPHA); | |
381 | } else { | ||
382 | ✗ | deloco_rgb8(ptr, s->row_size, | |
383 | ✗ | s->color_type == PNG_COLOR_TYPE_RGB_ALPHA); | |
384 | } | ||
385 | } | ||
386 | } | ||
387 | } else { | ||
388 | 1920 | got_line = 0; | |
389 | for (;;) { | ||
390 | 9080 | ptr = dst + dst_stride * (s->y + s->y_offset) + s->x_offset * s->bpp; | |
391 |
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9080 | if ((ff_png_pass_ymask[s->pass] << (s->y & 7)) & 0x80) { |
392 | /* if we already read one row, it is time to stop to | ||
393 | * wait for the next one */ | ||
394 |
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3832 | if (got_line) |
395 | 1912 | break; | |
396 | 1920 | ff_png_filter_row(&s->dsp, s->tmp_row, s->crow_buf[0], s->crow_buf + 1, | |
397 | s->last_row, s->pass_row_size, s->bpp); | ||
398 | 1920 | FFSWAP(uint8_t *, s->last_row, s->tmp_row); | |
399 | 1920 | FFSWAP(unsigned int, s->last_row_size, s->tmp_row_size); | |
400 | 1920 | got_line = 1; | |
401 | } | ||
402 |
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7168 | if ((png_pass_dsp_ymask[s->pass] << (s->y & 7)) & 0x80) { |
403 | 5632 | png_put_interlaced_row(ptr, s->cur_w, s->bits_per_pixel, s->pass, | |
404 | 5632 | s->color_type, s->last_row); | |
405 | } | ||
406 | 7168 | s->y++; | |
407 |
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7168 | if (s->y == s->cur_h) { |
408 | 56 | memset(s->last_row, 0, s->row_size); | |
409 | for (;;) { | ||
410 |
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56 | if (s->pass == NB_PASSES - 1) { |
411 | 8 | s->pic_state |= PNG_ALLIMAGE; | |
412 | 8 | goto the_end; | |
413 | } else { | ||
414 | 48 | s->pass++; | |
415 | 48 | s->y = 0; | |
416 | 48 | s->pass_row_size = ff_png_pass_row_size(s->pass, | |
417 | s->bits_per_pixel, | ||
418 | s->cur_w); | ||
419 | 48 | s->crow_size = s->pass_row_size + 1; | |
420 |
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48 | if (s->pass_row_size != 0) |
421 | 48 | break; | |
422 | /* skip pass if empty row */ | ||
423 | } | ||
424 | } | ||
425 | } | ||
426 | } | ||
427 | 1920 | the_end:; | |
428 | } | ||
429 | 123047 | } | |
430 | |||
431 | 16334 | static int png_decode_idat(PNGDecContext *s, GetByteContext *gb, | |
432 | uint8_t *dst, ptrdiff_t dst_stride) | ||
433 | { | ||
434 | 16334 | z_stream *const zstream = &s->zstream.zstream; | |
435 | int ret; | ||
436 | 16334 | zstream->avail_in = bytestream2_get_bytes_left(gb); | |
437 | 16334 | zstream->next_in = gb->buffer; | |
438 | |||
439 | /* decode one line if possible */ | ||
440 |
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155033 | while (zstream->avail_in > 0) { |
441 | 138699 | ret = inflate(zstream, Z_PARTIAL_FLUSH); | |
442 |
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138699 | if (ret != Z_OK && ret != Z_STREAM_END) { |
443 | ✗ | av_log(s->avctx, AV_LOG_ERROR, "inflate returned error %d\n", ret); | |
444 | ✗ | return AVERROR_EXTERNAL; | |
445 | } | ||
446 |
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138699 | if (zstream->avail_out == 0) { |
447 |
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123047 | if (!(s->pic_state & PNG_ALLIMAGE)) { |
448 | 123047 | png_handle_row(s, dst, dst_stride); | |
449 | } | ||
450 | 123047 | zstream->avail_out = s->crow_size; | |
451 | 123047 | zstream->next_out = s->crow_buf; | |
452 | } | ||
453 |
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138699 | if (ret == Z_STREAM_END && zstream->avail_in > 0) { |
454 | ✗ | av_log(s->avctx, AV_LOG_WARNING, | |
455 | "%d undecompressed bytes left in buffer\n", zstream->avail_in); | ||
456 | ✗ | return 0; | |
457 | } | ||
458 | } | ||
459 | 16334 | return 0; | |
460 | } | ||
461 | |||
462 | 6 | static int decode_zbuf(AVBPrint *bp, const uint8_t *data, | |
463 | const uint8_t *data_end, void *logctx) | ||
464 | { | ||
465 | FFZStream z; | ||
466 | 6 | z_stream *const zstream = &z.zstream; | |
467 | unsigned char *buf; | ||
468 | unsigned buf_size; | ||
469 | 6 | int ret = ff_inflate_init(&z, logctx); | |
470 |
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6 | if (ret < 0) |
471 | ✗ | return ret; | |
472 | |||
473 | 6 | zstream->next_in = data; | |
474 | 6 | zstream->avail_in = data_end - data; | |
475 | 6 | av_bprint_init(bp, 0, AV_BPRINT_SIZE_UNLIMITED); | |
476 | |||
477 |
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18 | while (zstream->avail_in > 0) { |
478 | 18 | av_bprint_get_buffer(bp, 2, &buf, &buf_size); | |
479 |
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|
18 | if (buf_size < 2) { |
480 | ✗ | ret = AVERROR(ENOMEM); | |
481 | ✗ | goto fail; | |
482 | } | ||
483 | 18 | zstream->next_out = buf; | |
484 | 18 | zstream->avail_out = buf_size - 1; | |
485 | 18 | ret = inflate(zstream, Z_PARTIAL_FLUSH); | |
486 |
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18 | if (ret != Z_OK && ret != Z_STREAM_END) { |
487 | ✗ | ret = AVERROR_EXTERNAL; | |
488 | ✗ | goto fail; | |
489 | } | ||
490 | 18 | bp->len += zstream->next_out - buf; | |
491 |
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18 | if (ret == Z_STREAM_END) |
492 | 6 | break; | |
493 | } | ||
494 | 6 | ff_inflate_end(&z); | |
495 | 6 | bp->str[bp->len] = 0; | |
496 | 6 | return 0; | |
497 | |||
498 | ✗ | fail: | |
499 | ✗ | ff_inflate_end(&z); | |
500 | ✗ | av_bprint_finalize(bp, NULL); | |
501 | ✗ | return ret; | |
502 | } | ||
503 | |||
504 | 274 | static uint8_t *iso88591_to_utf8(const uint8_t *in, size_t size_in) | |
505 | { | ||
506 | 274 | size_t extra = 0, i; | |
507 | uint8_t *out, *q; | ||
508 | |||
509 |
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4789 | for (i = 0; i < size_in; i++) |
510 | 4515 | extra += in[i] >= 0x80; | |
511 |
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274 | if (size_in == SIZE_MAX || extra > SIZE_MAX - size_in - 1) |
512 | ✗ | return NULL; | |
513 | 274 | q = out = av_malloc(size_in + extra + 1); | |
514 |
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|
274 | if (!out) |
515 | ✗ | return NULL; | |
516 |
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4789 | for (i = 0; i < size_in; i++) { |
517 |
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4515 | if (in[i] >= 0x80) { |
518 | ✗ | *(q++) = 0xC0 | (in[i] >> 6); | |
519 | ✗ | *(q++) = 0x80 | (in[i] & 0x3F); | |
520 | } else { | ||
521 | 4515 | *(q++) = in[i]; | |
522 | } | ||
523 | } | ||
524 | 274 | *(q++) = 0; | |
525 | 274 | return out; | |
526 | } | ||
527 | |||
528 | 137 | static int decode_text_chunk(PNGDecContext *s, GetByteContext *gb, int compressed) | |
529 | { | ||
530 | int ret, method; | ||
531 | 137 | const uint8_t *data = gb->buffer; | |
532 | 137 | const uint8_t *data_end = gb->buffer_end; | |
533 | 137 | const uint8_t *keyword = data; | |
534 | 137 | const uint8_t *keyword_end = memchr(keyword, 0, data_end - keyword); | |
535 | 137 | uint8_t *kw_utf8 = NULL, *text, *txt_utf8 = NULL; | |
536 | unsigned text_len; | ||
537 | AVBPrint bp; | ||
538 | |||
539 |
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137 | if (!keyword_end) |
540 | ✗ | return AVERROR_INVALIDDATA; | |
541 | 137 | data = keyword_end + 1; | |
542 | |||
543 |
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137 | if (compressed) { |
544 | ✗ | if (data == data_end) | |
545 | ✗ | return AVERROR_INVALIDDATA; | |
546 | ✗ | method = *(data++); | |
547 | ✗ | if (method) | |
548 | ✗ | return AVERROR_INVALIDDATA; | |
549 | ✗ | if ((ret = decode_zbuf(&bp, data, data_end, s->avctx)) < 0) | |
550 | ✗ | return ret; | |
551 | ✗ | text_len = bp.len; | |
552 | ✗ | ret = av_bprint_finalize(&bp, (char **)&text); | |
553 | ✗ | if (ret < 0) | |
554 | ✗ | return ret; | |
555 | } else { | ||
556 | 137 | text = (uint8_t *)data; | |
557 | 137 | text_len = data_end - text; | |
558 | } | ||
559 | |||
560 | 137 | kw_utf8 = iso88591_to_utf8(keyword, keyword_end - keyword); | |
561 | 137 | txt_utf8 = iso88591_to_utf8(text, text_len); | |
562 |
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137 | if (text != data) |
563 | ✗ | av_free(text); | |
564 |
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137 | if (!(kw_utf8 && txt_utf8)) { |
565 | ✗ | av_free(kw_utf8); | |
566 | ✗ | av_free(txt_utf8); | |
567 | ✗ | return AVERROR(ENOMEM); | |
568 | } | ||
569 | |||
570 | 137 | av_dict_set(&s->frame_metadata, kw_utf8, txt_utf8, | |
571 | AV_DICT_DONT_STRDUP_KEY | AV_DICT_DONT_STRDUP_VAL); | ||
572 | 137 | return 0; | |
573 | } | ||
574 | |||
575 | 412 | static int decode_ihdr_chunk(AVCodecContext *avctx, PNGDecContext *s, | |
576 | GetByteContext *gb) | ||
577 | { | ||
578 |
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412 | if (bytestream2_get_bytes_left(gb) != 13) |
579 | ✗ | return AVERROR_INVALIDDATA; | |
580 | |||
581 |
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412 | if (s->pic_state & PNG_IDAT) { |
582 | ✗ | av_log(avctx, AV_LOG_ERROR, "IHDR after IDAT\n"); | |
583 | ✗ | return AVERROR_INVALIDDATA; | |
584 | } | ||
585 | |||
586 |
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412 | if (s->hdr_state & PNG_IHDR) { |
587 | ✗ | av_log(avctx, AV_LOG_ERROR, "Multiple IHDR\n"); | |
588 | ✗ | return AVERROR_INVALIDDATA; | |
589 | } | ||
590 | |||
591 | 412 | s->width = s->cur_w = bytestream2_get_be32(gb); | |
592 | 412 | s->height = s->cur_h = bytestream2_get_be32(gb); | |
593 |
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412 | if (av_image_check_size(s->width, s->height, 0, avctx)) { |
594 | ✗ | s->cur_w = s->cur_h = s->width = s->height = 0; | |
595 | ✗ | av_log(avctx, AV_LOG_ERROR, "Invalid image size\n"); | |
596 | ✗ | return AVERROR_INVALIDDATA; | |
597 | } | ||
598 | 412 | s->bit_depth = bytestream2_get_byte(gb); | |
599 |
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412 | if (s->bit_depth != 1 && s->bit_depth != 2 && s->bit_depth != 4 && |
600 |
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412 | s->bit_depth != 8 && s->bit_depth != 16) { |
601 | ✗ | av_log(avctx, AV_LOG_ERROR, "Invalid bit depth\n"); | |
602 | ✗ | goto error; | |
603 | } | ||
604 | 412 | s->color_type = bytestream2_get_byte(gb); | |
605 | 412 | s->compression_type = bytestream2_get_byte(gb); | |
606 |
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412 | if (s->compression_type) { |
607 | ✗ | av_log(avctx, AV_LOG_ERROR, "Invalid compression method %d\n", s->compression_type); | |
608 | ✗ | goto error; | |
609 | } | ||
610 | 412 | s->filter_type = bytestream2_get_byte(gb); | |
611 | 412 | s->interlace_type = bytestream2_get_byte(gb); | |
612 | 412 | s->hdr_state |= PNG_IHDR; | |
613 |
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412 | if (avctx->debug & FF_DEBUG_PICT_INFO) |
614 | ✗ | av_log(avctx, AV_LOG_DEBUG, "width=%d height=%d depth=%d color_type=%d " | |
615 | "compression_type=%d filter_type=%d interlace_type=%d\n", | ||
616 | s->width, s->height, s->bit_depth, s->color_type, | ||
617 | s->compression_type, s->filter_type, s->interlace_type); | ||
618 | |||
619 | 412 | return 0; | |
620 | ✗ | error: | |
621 | ✗ | s->cur_w = s->cur_h = s->width = s->height = 0; | |
622 | ✗ | s->bit_depth = 8; | |
623 | ✗ | return AVERROR_INVALIDDATA; | |
624 | } | ||
625 | |||
626 | 379 | static int decode_phys_chunk(AVCodecContext *avctx, PNGDecContext *s, | |
627 | GetByteContext *gb) | ||
628 | { | ||
629 |
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379 | if (s->pic_state & PNG_IDAT) { |
630 | ✗ | av_log(avctx, AV_LOG_ERROR, "pHYs after IDAT\n"); | |
631 | ✗ | return AVERROR_INVALIDDATA; | |
632 | } | ||
633 | 379 | avctx->sample_aspect_ratio.num = bytestream2_get_be32(gb); | |
634 | 379 | avctx->sample_aspect_ratio.den = bytestream2_get_be32(gb); | |
635 |
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379 | if (avctx->sample_aspect_ratio.num < 0 || avctx->sample_aspect_ratio.den < 0) |
636 | ✗ | avctx->sample_aspect_ratio = (AVRational){ 0, 1 }; | |
637 | 379 | bytestream2_skip(gb, 1); /* unit specifier */ | |
638 | |||
639 | 379 | return 0; | |
640 | } | ||
641 | |||
642 | 16334 | static int decode_idat_chunk(AVCodecContext *avctx, PNGDecContext *s, | |
643 | GetByteContext *gb, AVFrame *p) | ||
644 | { | ||
645 | int ret; | ||
646 |
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16334 | size_t byte_depth = s->bit_depth > 8 ? 2 : 1; |
647 | |||
648 |
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16334 | if (!(s->hdr_state & PNG_IHDR)) { |
649 | ✗ | av_log(avctx, AV_LOG_ERROR, "IDAT without IHDR\n"); | |
650 | ✗ | return AVERROR_INVALIDDATA; | |
651 | } | ||
652 |
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16334 | if (!(s->pic_state & PNG_IDAT)) { |
653 | /* init image info */ | ||
654 | 657 | ret = ff_set_dimensions(avctx, s->width, s->height); | |
655 |
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657 | if (ret < 0) |
656 | ✗ | return ret; | |
657 | |||
658 | 657 | s->channels = ff_png_get_nb_channels(s->color_type); | |
659 | 657 | s->bits_per_pixel = s->bit_depth * s->channels; | |
660 | 657 | s->bpp = (s->bits_per_pixel + 7) >> 3; | |
661 | 657 | s->row_size = (s->cur_w * s->bits_per_pixel + 7) >> 3; | |
662 | |||
663 |
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657 | if ((s->bit_depth == 2 || s->bit_depth == 4 || s->bit_depth == 8) && |
664 |
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617 | s->color_type == PNG_COLOR_TYPE_RGB) { |
665 | 472 | avctx->pix_fmt = AV_PIX_FMT_RGB24; | |
666 |
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185 | } else if ((s->bit_depth == 2 || s->bit_depth == 4 || s->bit_depth == 8) && |
667 |
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145 | s->color_type == PNG_COLOR_TYPE_RGB_ALPHA) { |
668 | 97 | avctx->pix_fmt = AV_PIX_FMT_RGBA; | |
669 |
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88 | } else if ((s->bit_depth == 2 || s->bit_depth == 4 || s->bit_depth == 8) && |
670 |
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48 | s->color_type == PNG_COLOR_TYPE_GRAY) { |
671 | 4 | avctx->pix_fmt = AV_PIX_FMT_GRAY8; | |
672 |
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84 | } else if (s->bit_depth == 16 && |
673 |
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40 | s->color_type == PNG_COLOR_TYPE_GRAY) { |
674 | 16 | avctx->pix_fmt = AV_PIX_FMT_GRAY16BE; | |
675 |
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68 | } else if (s->bit_depth == 16 && |
676 |
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24 | s->color_type == PNG_COLOR_TYPE_RGB) { |
677 | 18 | avctx->pix_fmt = AV_PIX_FMT_RGB48BE; | |
678 |
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50 | } else if (s->bit_depth == 16 && |
679 |
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6 | s->color_type == PNG_COLOR_TYPE_RGB_ALPHA) { |
680 | 4 | avctx->pix_fmt = AV_PIX_FMT_RGBA64BE; | |
681 |
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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) && |
682 |
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42 | s->color_type == PNG_COLOR_TYPE_PALETTE) { |
683 |
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42 | avctx->pix_fmt = avctx->codec_id == AV_CODEC_ID_APNG ? AV_PIX_FMT_RGBA : AV_PIX_FMT_PAL8; |
684 |
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4 | } else if (s->bit_depth == 1 && s->bits_per_pixel == 1 && avctx->codec_id != AV_CODEC_ID_APNG) { |
685 | ✗ | avctx->pix_fmt = AV_PIX_FMT_MONOBLACK; | |
686 |
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4 | } else if (s->bit_depth == 8 && |
687 |
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2 | s->color_type == PNG_COLOR_TYPE_GRAY_ALPHA) { |
688 | 2 | avctx->pix_fmt = AV_PIX_FMT_YA8; | |
689 |
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2 | } else if (s->bit_depth == 16 && |
690 |
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2 | s->color_type == PNG_COLOR_TYPE_GRAY_ALPHA) { |
691 | 2 | avctx->pix_fmt = AV_PIX_FMT_YA16BE; | |
692 | } else { | ||
693 | ✗ | avpriv_report_missing_feature(avctx, | |
694 | "Bit depth %d color type %d", | ||
695 | s->bit_depth, s->color_type); | ||
696 | ✗ | return AVERROR_PATCHWELCOME; | |
697 | } | ||
698 | |||
699 |
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657 | if (s->has_trns && s->color_type != PNG_COLOR_TYPE_PALETTE) { |
700 |
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137 | switch (avctx->pix_fmt) { |
701 | 137 | case AV_PIX_FMT_RGB24: | |
702 | 137 | avctx->pix_fmt = AV_PIX_FMT_RGBA; | |
703 | 137 | break; | |
704 | |||
705 | ✗ | case AV_PIX_FMT_RGB48BE: | |
706 | ✗ | avctx->pix_fmt = AV_PIX_FMT_RGBA64BE; | |
707 | ✗ | break; | |
708 | |||
709 | ✗ | case AV_PIX_FMT_GRAY8: | |
710 | ✗ | avctx->pix_fmt = AV_PIX_FMT_YA8; | |
711 | ✗ | break; | |
712 | |||
713 | ✗ | case AV_PIX_FMT_GRAY16BE: | |
714 | ✗ | avctx->pix_fmt = AV_PIX_FMT_YA16BE; | |
715 | ✗ | break; | |
716 | |||
717 | ✗ | default: | |
718 | ✗ | avpriv_request_sample(avctx, "bit depth %d " | |
719 | "and color type %d with TRNS", | ||
720 | s->bit_depth, s->color_type); | ||
721 | ✗ | return AVERROR_INVALIDDATA; | |
722 | } | ||
723 | |||
724 | 137 | s->bpp += byte_depth; | |
725 | } | ||
726 | |||
727 | 657 | ff_thread_release_ext_buffer(avctx, &s->picture); | |
728 |
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657 | if ((ret = ff_thread_get_ext_buffer(avctx, &s->picture, |
729 | AV_GET_BUFFER_FLAG_REF)) < 0) | ||
730 | ✗ | return ret; | |
731 | |||
732 | 657 | p->pict_type = AV_PICTURE_TYPE_I; | |
733 | 657 | p->key_frame = 1; | |
734 | 657 | p->interlaced_frame = !!s->interlace_type; | |
735 | |||
736 | 657 | ff_thread_finish_setup(avctx); | |
737 | |||
738 | /* compute the compressed row size */ | ||
739 |
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657 | if (!s->interlace_type) { |
740 | 649 | s->crow_size = s->row_size + 1; | |
741 | } else { | ||
742 | 8 | s->pass = 0; | |
743 | 8 | s->pass_row_size = ff_png_pass_row_size(s->pass, | |
744 | s->bits_per_pixel, | ||
745 | s->cur_w); | ||
746 | 8 | s->crow_size = s->pass_row_size + 1; | |
747 | } | ||
748 | ff_dlog(avctx, "row_size=%d crow_size =%d\n", | ||
749 | s->row_size, s->crow_size); | ||
750 | |||
751 | /* copy the palette if needed */ | ||
752 |
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657 | if (avctx->pix_fmt == AV_PIX_FMT_PAL8) |
753 | ✗ | memcpy(p->data[1], s->palette, 256 * sizeof(uint32_t)); | |
754 | /* empty row is used if differencing to the first row */ | ||
755 | 657 | av_fast_padded_mallocz(&s->last_row, &s->last_row_size, s->row_size); | |
756 |
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657 | if (!s->last_row) |
757 | ✗ | return AVERROR_INVALIDDATA; | |
758 |
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657 | if (s->interlace_type || |
759 |
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649 | s->color_type == PNG_COLOR_TYPE_RGB_ALPHA) { |
760 | 109 | av_fast_padded_malloc(&s->tmp_row, &s->tmp_row_size, s->row_size); | |
761 |
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|
109 | if (!s->tmp_row) |
762 | ✗ | return AVERROR_INVALIDDATA; | |
763 | } | ||
764 | /* compressed row */ | ||
765 | 657 | av_fast_padded_malloc(&s->buffer, &s->buffer_size, s->row_size + 16); | |
766 |
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657 | if (!s->buffer) |
767 | ✗ | return AVERROR(ENOMEM); | |
768 | |||
769 | /* we want crow_buf+1 to be 16-byte aligned */ | ||
770 | 657 | s->crow_buf = s->buffer + 15; | |
771 | 657 | s->zstream.zstream.avail_out = s->crow_size; | |
772 | 657 | s->zstream.zstream.next_out = s->crow_buf; | |
773 | } | ||
774 | |||
775 | 16334 | s->pic_state |= PNG_IDAT; | |
776 | |||
777 | /* set image to non-transparent bpp while decompressing */ | ||
778 |
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16334 | if (s->has_trns && s->color_type != PNG_COLOR_TYPE_PALETTE) |
779 | 147 | s->bpp -= byte_depth; | |
780 | |||
781 | 16334 | ret = png_decode_idat(s, gb, p->data[0], p->linesize[0]); | |
782 | |||
783 |
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16334 | if (s->has_trns && s->color_type != PNG_COLOR_TYPE_PALETTE) |
784 | 147 | s->bpp += byte_depth; | |
785 | |||
786 |
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16334 | if (ret < 0) |
787 | ✗ | return ret; | |
788 | |||
789 | 16334 | return 0; | |
790 | } | ||
791 | |||
792 | 3 | static int decode_plte_chunk(AVCodecContext *avctx, PNGDecContext *s, | |
793 | GetByteContext *gb) | ||
794 | { | ||
795 | 3 | int length = bytestream2_get_bytes_left(gb); | |
796 | int n, i, r, g, b; | ||
797 | |||
798 |
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3 | if ((length % 3) != 0 || length > 256 * 3) |
799 | ✗ | return AVERROR_INVALIDDATA; | |
800 | /* read the palette */ | ||
801 | 3 | n = length / 3; | |
802 |
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|
711 | for (i = 0; i < n; i++) { |
803 | 708 | r = bytestream2_get_byte(gb); | |
804 | 708 | g = bytestream2_get_byte(gb); | |
805 | 708 | b = bytestream2_get_byte(gb); | |
806 | 708 | s->palette[i] = (0xFFU << 24) | (r << 16) | (g << 8) | b; | |
807 | } | ||
808 |
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63 | for (; i < 256; i++) |
809 | 60 | s->palette[i] = (0xFFU << 24); | |
810 | 3 | s->hdr_state |= PNG_PLTE; | |
811 | |||
812 | 3 | return 0; | |
813 | } | ||
814 | |||
815 | 7 | static int decode_trns_chunk(AVCodecContext *avctx, PNGDecContext *s, | |
816 | GetByteContext *gb) | ||
817 | { | ||
818 | 7 | int length = bytestream2_get_bytes_left(gb); | |
819 | int v, i; | ||
820 | |||
821 |
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|
7 | if (!(s->hdr_state & PNG_IHDR)) { |
822 | ✗ | av_log(avctx, AV_LOG_ERROR, "trns before IHDR\n"); | |
823 | ✗ | return AVERROR_INVALIDDATA; | |
824 | } | ||
825 | |||
826 |
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|
7 | if (s->pic_state & PNG_IDAT) { |
827 | ✗ | av_log(avctx, AV_LOG_ERROR, "trns after IDAT\n"); | |
828 | ✗ | return AVERROR_INVALIDDATA; | |
829 | } | ||
830 | |||
831 |
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7 | if (s->color_type == PNG_COLOR_TYPE_PALETTE) { |
832 |
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3 | if (length > 256 || !(s->hdr_state & PNG_PLTE)) |
833 | ✗ | return AVERROR_INVALIDDATA; | |
834 | |||
835 |
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54 | for (i = 0; i < length; i++) { |
836 | 51 | unsigned v = bytestream2_get_byte(gb); | |
837 | 51 | s->palette[i] = (s->palette[i] & 0x00ffffff) | (v << 24); | |
838 | } | ||
839 |
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4 | } else if (s->color_type == PNG_COLOR_TYPE_GRAY || s->color_type == PNG_COLOR_TYPE_RGB) { |
840 |
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4 | if ((s->color_type == PNG_COLOR_TYPE_GRAY && length != 2) || |
841 |
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4 | (s->color_type == PNG_COLOR_TYPE_RGB && length != 6) || |
842 |
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4 | s->bit_depth == 1) |
843 | ✗ | return AVERROR_INVALIDDATA; | |
844 | |||
845 |
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16 | for (i = 0; i < length / 2; i++) { |
846 | /* only use the least significant bits */ | ||
847 | 12 | v = av_mod_uintp2(bytestream2_get_be16(gb), s->bit_depth); | |
848 | |||
849 |
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12 | if (s->bit_depth > 8) |
850 | ✗ | AV_WB16(&s->transparent_color_be[2 * i], v); | |
851 | else | ||
852 | 12 | s->transparent_color_be[i] = v; | |
853 | } | ||
854 | } else { | ||
855 | ✗ | return AVERROR_INVALIDDATA; | |
856 | } | ||
857 | |||
858 | 7 | s->has_trns = 1; | |
859 | |||
860 | 7 | return 0; | |
861 | } | ||
862 | |||
863 | 6 | static int decode_iccp_chunk(PNGDecContext *s, GetByteContext *gb, AVFrame *f) | |
864 | { | ||
865 | 6 | int ret, cnt = 0; | |
866 | AVBPrint bp; | ||
867 | |||
868 |
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132 | while ((s->iccp_name[cnt++] = bytestream2_get_byte(gb)) && cnt < 81); |
869 |
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|
6 | if (cnt > 80) { |
870 | ✗ | av_log(s->avctx, AV_LOG_ERROR, "iCCP with invalid name!\n"); | |
871 | ✗ | ret = AVERROR_INVALIDDATA; | |
872 | ✗ | goto fail; | |
873 | } | ||
874 | |||
875 |
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|
6 | if (bytestream2_get_byte(gb) != 0) { |
876 | ✗ | av_log(s->avctx, AV_LOG_ERROR, "iCCP with invalid compression!\n"); | |
877 | ✗ | ret = AVERROR_INVALIDDATA; | |
878 | ✗ | goto fail; | |
879 | } | ||
880 | |||
881 |
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|
6 | if ((ret = decode_zbuf(&bp, gb->buffer, gb->buffer_end, s->avctx)) < 0) |
882 | ✗ | return ret; | |
883 | |||
884 | 6 | av_freep(&s->iccp_data); | |
885 | 6 | ret = av_bprint_finalize(&bp, (char **)&s->iccp_data); | |
886 |
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6 | if (ret < 0) |
887 | ✗ | return ret; | |
888 | 6 | s->iccp_data_len = bp.len; | |
889 | |||
890 | 6 | return 0; | |
891 | ✗ | fail: | |
892 | ✗ | s->iccp_name[0] = 0; | |
893 | ✗ | return ret; | |
894 | } | ||
895 | |||
896 | ✗ | static void handle_small_bpp(PNGDecContext *s, AVFrame *p) | |
897 | { | ||
898 | ✗ | if (s->bits_per_pixel == 1 && s->color_type == PNG_COLOR_TYPE_PALETTE) { | |
899 | int i, j, k; | ||
900 | ✗ | uint8_t *pd = p->data[0]; | |
901 | ✗ | for (j = 0; j < s->height; j++) { | |
902 | ✗ | i = s->width / 8; | |
903 | ✗ | for (k = 7; k >= 1; k--) | |
904 | ✗ | if ((s->width&7) >= k) | |
905 | ✗ | pd[8*i + k - 1] = (pd[i]>>8-k) & 1; | |
906 | ✗ | for (i--; i >= 0; i--) { | |
907 | ✗ | pd[8*i + 7]= pd[i] & 1; | |
908 | ✗ | pd[8*i + 6]= (pd[i]>>1) & 1; | |
909 | ✗ | pd[8*i + 5]= (pd[i]>>2) & 1; | |
910 | ✗ | pd[8*i + 4]= (pd[i]>>3) & 1; | |
911 | ✗ | pd[8*i + 3]= (pd[i]>>4) & 1; | |
912 | ✗ | pd[8*i + 2]= (pd[i]>>5) & 1; | |
913 | ✗ | pd[8*i + 1]= (pd[i]>>6) & 1; | |
914 | ✗ | pd[8*i + 0]= pd[i]>>7; | |
915 | } | ||
916 | ✗ | pd += p->linesize[0]; | |
917 | } | ||
918 | ✗ | } else if (s->bits_per_pixel == 2) { | |
919 | int i, j; | ||
920 | ✗ | uint8_t *pd = p->data[0]; | |
921 | ✗ | for (j = 0; j < s->height; j++) { | |
922 | ✗ | i = s->width / 4; | |
923 | ✗ | if (s->color_type == PNG_COLOR_TYPE_PALETTE) { | |
924 | ✗ | if ((s->width&3) >= 3) pd[4*i + 2]= (pd[i] >> 2) & 3; | |
925 | ✗ | if ((s->width&3) >= 2) pd[4*i + 1]= (pd[i] >> 4) & 3; | |
926 | ✗ | if ((s->width&3) >= 1) pd[4*i + 0]= pd[i] >> 6; | |
927 | ✗ | for (i--; i >= 0; i--) { | |
928 | ✗ | pd[4*i + 3]= pd[i] & 3; | |
929 | ✗ | pd[4*i + 2]= (pd[i]>>2) & 3; | |
930 | ✗ | pd[4*i + 1]= (pd[i]>>4) & 3; | |
931 | ✗ | pd[4*i + 0]= pd[i]>>6; | |
932 | } | ||
933 | } else { | ||
934 | ✗ | if ((s->width&3) >= 3) pd[4*i + 2]= ((pd[i]>>2) & 3)*0x55; | |
935 | ✗ | if ((s->width&3) >= 2) pd[4*i + 1]= ((pd[i]>>4) & 3)*0x55; | |
936 | ✗ | if ((s->width&3) >= 1) pd[4*i + 0]= ( pd[i]>>6 )*0x55; | |
937 | ✗ | for (i--; i >= 0; i--) { | |
938 | ✗ | pd[4*i + 3]= ( pd[i] & 3)*0x55; | |
939 | ✗ | pd[4*i + 2]= ((pd[i]>>2) & 3)*0x55; | |
940 | ✗ | pd[4*i + 1]= ((pd[i]>>4) & 3)*0x55; | |
941 | ✗ | pd[4*i + 0]= ( pd[i]>>6 )*0x55; | |
942 | } | ||
943 | } | ||
944 | ✗ | pd += p->linesize[0]; | |
945 | } | ||
946 | ✗ | } else if (s->bits_per_pixel == 4) { | |
947 | int i, j; | ||
948 | ✗ | uint8_t *pd = p->data[0]; | |
949 | ✗ | for (j = 0; j < s->height; j++) { | |
950 | ✗ | i = s->width/2; | |
951 | ✗ | if (s->color_type == PNG_COLOR_TYPE_PALETTE) { | |
952 | ✗ | if (s->width&1) pd[2*i+0]= pd[i]>>4; | |
953 | ✗ | for (i--; i >= 0; i--) { | |
954 | ✗ | pd[2*i + 1] = pd[i] & 15; | |
955 | ✗ | pd[2*i + 0] = pd[i] >> 4; | |
956 | } | ||
957 | } else { | ||
958 | ✗ | if (s->width & 1) pd[2*i + 0]= (pd[i] >> 4) * 0x11; | |
959 | ✗ | for (i--; i >= 0; i--) { | |
960 | ✗ | pd[2*i + 1] = (pd[i] & 15) * 0x11; | |
961 | ✗ | pd[2*i + 0] = (pd[i] >> 4) * 0x11; | |
962 | } | ||
963 | } | ||
964 | ✗ | pd += p->linesize[0]; | |
965 | } | ||
966 | } | ||
967 | } | ||
968 | |||
969 | 262 | static int decode_fctl_chunk(AVCodecContext *avctx, PNGDecContext *s, | |
970 | GetByteContext *gb) | ||
971 | { | ||
972 | uint32_t sequence_number; | ||
973 | int cur_w, cur_h, x_offset, y_offset, dispose_op, blend_op; | ||
974 | |||
975 |
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262 | if (bytestream2_get_bytes_left(gb) != 26) |
976 | ✗ | return AVERROR_INVALIDDATA; | |
977 | |||
978 |
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262 | if (!(s->hdr_state & PNG_IHDR)) { |
979 | ✗ | av_log(avctx, AV_LOG_ERROR, "fctl before IHDR\n"); | |
980 | ✗ | return AVERROR_INVALIDDATA; | |
981 | } | ||
982 | |||
983 |
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262 | if (s->pic_state & PNG_IDAT) { |
984 | ✗ | av_log(avctx, AV_LOG_ERROR, "fctl after IDAT\n"); | |
985 | ✗ | return AVERROR_INVALIDDATA; | |
986 | } | ||
987 | |||
988 | 262 | s->last_w = s->cur_w; | |
989 | 262 | s->last_h = s->cur_h; | |
990 | 262 | s->last_x_offset = s->x_offset; | |
991 | 262 | s->last_y_offset = s->y_offset; | |
992 | 262 | s->last_dispose_op = s->dispose_op; | |
993 | |||
994 | 262 | sequence_number = bytestream2_get_be32(gb); | |
995 | 262 | cur_w = bytestream2_get_be32(gb); | |
996 | 262 | cur_h = bytestream2_get_be32(gb); | |
997 | 262 | x_offset = bytestream2_get_be32(gb); | |
998 | 262 | y_offset = bytestream2_get_be32(gb); | |
999 | 262 | bytestream2_skip(gb, 4); /* delay_num (2), delay_den (2) */ | |
1000 | 262 | dispose_op = bytestream2_get_byte(gb); | |
1001 | 262 | blend_op = bytestream2_get_byte(gb); | |
1002 | |||
1003 |
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262 | if (sequence_number == 0 && |
1004 |
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16 | (cur_w != s->width || |
1005 |
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16 | cur_h != s->height || |
1006 |
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16 | x_offset != 0 || |
1007 |
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262 | y_offset != 0) || |
1008 |
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262 | cur_w <= 0 || cur_h <= 0 || |
1009 |
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262 | x_offset < 0 || y_offset < 0 || |
1010 |
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262 | cur_w > s->width - x_offset|| cur_h > s->height - y_offset) |
1011 | ✗ | return AVERROR_INVALIDDATA; | |
1012 | |||
1013 |
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262 | if (blend_op != APNG_BLEND_OP_OVER && blend_op != APNG_BLEND_OP_SOURCE) { |
1014 | ✗ | av_log(avctx, AV_LOG_ERROR, "Invalid blend_op %d\n", blend_op); | |
1015 | ✗ | return AVERROR_INVALIDDATA; | |
1016 | } | ||
1017 | |||
1018 |
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262 | if ((sequence_number == 0 || !s->last_picture.f->data[0]) && |
1019 | dispose_op == APNG_DISPOSE_OP_PREVIOUS) { | ||
1020 | // No previous frame to revert to for the first frame | ||
1021 | // Spec says to just treat it as a APNG_DISPOSE_OP_BACKGROUND | ||
1022 | ✗ | dispose_op = APNG_DISPOSE_OP_BACKGROUND; | |
1023 | } | ||
1024 | |||
1025 |
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262 | if (blend_op == APNG_BLEND_OP_OVER && !s->has_trns && ( |
1026 |
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4 | avctx->pix_fmt == AV_PIX_FMT_RGB24 || |
1027 |
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4 | avctx->pix_fmt == AV_PIX_FMT_RGB48BE || |
1028 |
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4 | avctx->pix_fmt == AV_PIX_FMT_GRAY8 || |
1029 |
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4 | avctx->pix_fmt == AV_PIX_FMT_GRAY16BE || |
1030 |
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4 | avctx->pix_fmt == AV_PIX_FMT_MONOBLACK |
1031 | )) { | ||
1032 | // APNG_BLEND_OP_OVER is the same as APNG_BLEND_OP_SOURCE when there is no alpha channel | ||
1033 | ✗ | blend_op = APNG_BLEND_OP_SOURCE; | |
1034 | } | ||
1035 | |||
1036 | 262 | s->cur_w = cur_w; | |
1037 | 262 | s->cur_h = cur_h; | |
1038 | 262 | s->x_offset = x_offset; | |
1039 | 262 | s->y_offset = y_offset; | |
1040 | 262 | s->dispose_op = dispose_op; | |
1041 | 262 | s->blend_op = blend_op; | |
1042 | |||
1043 | 262 | return 0; | |
1044 | } | ||
1045 | |||
1046 | ✗ | static void handle_p_frame_png(PNGDecContext *s, AVFrame *p) | |
1047 | { | ||
1048 | int i, j; | ||
1049 | ✗ | uint8_t *pd = p->data[0]; | |
1050 | ✗ | uint8_t *pd_last = s->last_picture.f->data[0]; | |
1051 | ✗ | int ls = av_image_get_linesize(p->format, s->width, 0); | |
1052 | |||
1053 | ✗ | ls = FFMIN(ls, s->width * s->bpp); | |
1054 | |||
1055 | ✗ | ff_thread_await_progress(&s->last_picture, INT_MAX, 0); | |
1056 | ✗ | for (j = 0; j < s->height; j++) { | |
1057 | ✗ | for (i = 0; i < ls; i++) | |
1058 | ✗ | pd[i] += pd_last[i]; | |
1059 | ✗ | pd += p->linesize[0]; | |
1060 | ✗ | pd_last += s->last_picture.f->linesize[0]; | |
1061 | } | ||
1062 | } | ||
1063 | |||
1064 | // divide by 255 and round to nearest | ||
1065 | // apply a fast variant: (X+127)/255 = ((X+127)*257+257)>>16 = ((X+128)*257)>>16 | ||
1066 | #define FAST_DIV255(x) ((((x) + 128) * 257) >> 16) | ||
1067 | |||
1068 | 61 | static int handle_p_frame_apng(AVCodecContext *avctx, PNGDecContext *s, | |
1069 | AVFrame *p) | ||
1070 | { | ||
1071 | 61 | uint8_t *dst = p->data[0]; | |
1072 | 61 | ptrdiff_t dst_stride = p->linesize[0]; | |
1073 | 61 | const uint8_t *src = s->last_picture.f->data[0]; | |
1074 | 61 | ptrdiff_t src_stride = s->last_picture.f->linesize[0]; | |
1075 |
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61 | const int bpp = s->color_type == PNG_COLOR_TYPE_PALETTE ? 4 : s->bpp; |
1076 | |||
1077 | size_t x, y; | ||
1078 | |||
1079 |
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61 | if (s->blend_op == APNG_BLEND_OP_OVER && |
1080 |
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41 | avctx->pix_fmt != AV_PIX_FMT_RGBA && |
1081 | ✗ | avctx->pix_fmt != AV_PIX_FMT_GRAY8A) { | |
1082 | ✗ | avpriv_request_sample(avctx, "Blending with pixel format %s", | |
1083 | av_get_pix_fmt_name(avctx->pix_fmt)); | ||
1084 | ✗ | return AVERROR_PATCHWELCOME; | |
1085 | } | ||
1086 | |||
1087 | 61 | ff_thread_await_progress(&s->last_picture, INT_MAX, 0); | |
1088 | |||
1089 | // need to reset a rectangle to background: | ||
1090 |
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|
61 | if (s->last_dispose_op == APNG_DISPOSE_OP_BACKGROUND) { |
1091 | 11 | av_fast_malloc(&s->background_buf, &s->background_buf_allocated, | |
1092 | 11 | src_stride * p->height); | |
1093 |
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|
11 | if (!s->background_buf) |
1094 | ✗ | return AVERROR(ENOMEM); | |
1095 | |||
1096 | 11 | memcpy(s->background_buf, src, src_stride * p->height); | |
1097 | |||
1098 |
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|
870 | for (y = s->last_y_offset; y < s->last_y_offset + s->last_h; y++) { |
1099 | 859 | memset(s->background_buf + src_stride * y + | |
1100 | 859 | bpp * s->last_x_offset, 0, bpp * s->last_w); | |
1101 | } | ||
1102 | |||
1103 | 11 | src = s->background_buf; | |
1104 | } | ||
1105 | |||
1106 | // copy unchanged rectangles from the last frame | ||
1107 |
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|
2247 | for (y = 0; y < s->y_offset; y++) |
1108 | 2186 | memcpy(dst + y * dst_stride, src + y * src_stride, p->width * bpp); | |
1109 |
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|
3381 | for (y = s->y_offset; y < s->y_offset + s->cur_h; y++) { |
1110 | 3320 | memcpy(dst + y * dst_stride, src + y * src_stride, s->x_offset * bpp); | |
1111 | 3320 | memcpy(dst + y * dst_stride + (s->x_offset + s->cur_w) * bpp, | |
1112 | 3320 | src + y * src_stride + (s->x_offset + s->cur_w) * bpp, | |
1113 | 3320 | (p->width - s->cur_w - s->x_offset) * bpp); | |
1114 | } | ||
1115 |
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|
2561 | for (y = s->y_offset + s->cur_h; y < p->height; y++) |
1116 | 2500 | memcpy(dst + y * dst_stride, src + y * src_stride, p->width * bpp); | |
1117 | |||
1118 |
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|
61 | if (s->blend_op == APNG_BLEND_OP_OVER) { |
1119 | // Perform blending | ||
1120 |
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|
1953 | for (y = s->y_offset; y < s->y_offset + s->cur_h; ++y) { |
1121 | 1912 | uint8_t *foreground = dst + dst_stride * y + bpp * s->x_offset; | |
1122 | 1912 | const uint8_t *background = src + src_stride * y + bpp * s->x_offset; | |
1123 |
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|
145177 | for (x = s->x_offset; x < s->x_offset + s->cur_w; ++x, foreground += bpp, background += bpp) { |
1124 | size_t b; | ||
1125 | uint8_t foreground_alpha, background_alpha, output_alpha; | ||
1126 | uint8_t output[10]; | ||
1127 | |||
1128 | // Since we might be blending alpha onto alpha, we use the following equations: | ||
1129 | // output_alpha = foreground_alpha + (1 - foreground_alpha) * background_alpha | ||
1130 | // output = (foreground_alpha * foreground + (1 - foreground_alpha) * background_alpha * background) / output_alpha | ||
1131 | |||
1132 |
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|
143265 | switch (avctx->pix_fmt) { |
1133 | 143265 | case AV_PIX_FMT_RGBA: | |
1134 | 143265 | foreground_alpha = foreground[3]; | |
1135 | 143265 | background_alpha = background[3]; | |
1136 | 143265 | break; | |
1137 | |||
1138 | ✗ | case AV_PIX_FMT_GRAY8A: | |
1139 | ✗ | foreground_alpha = foreground[1]; | |
1140 | ✗ | background_alpha = background[1]; | |
1141 | ✗ | break; | |
1142 | } | ||
1143 | |||
1144 |
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|
143265 | if (foreground_alpha == 255) |
1145 | 143265 | continue; | |
1146 | |||
1147 |
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|
121583 | if (foreground_alpha == 0) { |
1148 | 121583 | memcpy(foreground, background, bpp); | |
1149 | 121583 | continue; | |
1150 | } | ||
1151 | |||
1152 | ✗ | output_alpha = foreground_alpha + FAST_DIV255((255 - foreground_alpha) * background_alpha); | |
1153 | |||
1154 | ✗ | av_assert0(bpp <= 10); | |
1155 | |||
1156 | ✗ | for (b = 0; b < bpp - 1; ++b) { | |
1157 | ✗ | if (output_alpha == 0) { | |
1158 | ✗ | output[b] = 0; | |
1159 | ✗ | } else if (background_alpha == 255) { | |
1160 | ✗ | output[b] = FAST_DIV255(foreground_alpha * foreground[b] + (255 - foreground_alpha) * background[b]); | |
1161 | } else { | ||
1162 | ✗ | output[b] = (255 * foreground_alpha * foreground[b] + (255 - foreground_alpha) * background_alpha * background[b]) / (255 * output_alpha); | |
1163 | } | ||
1164 | } | ||
1165 | ✗ | output[b] = output_alpha; | |
1166 | ✗ | memcpy(foreground, output, bpp); | |
1167 | } | ||
1168 | } | ||
1169 | } | ||
1170 | |||
1171 | 61 | return 0; | |
1172 | } | ||
1173 | |||
1174 | 674 | static int decode_frame_common(AVCodecContext *avctx, PNGDecContext *s, | |
1175 | AVFrame *p, const AVPacket *avpkt) | ||
1176 | { | ||
1177 | 674 | const AVCRC *crc_tab = av_crc_get_table(AV_CRC_32_IEEE_LE); | |
1178 | uint32_t tag, length; | ||
1179 | 674 | int decode_next_dat = 0; | |
1180 | int i, ret; | ||
1181 | |||
1182 | 17819 | for (;;) { | |
1183 | GetByteContext gb_chunk; | ||
1184 | |||
1185 | 18493 | length = bytestream2_get_bytes_left(&s->gb); | |
1186 |
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|
18493 | if (length <= 0) { |
1187 | |||
1188 |
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|
352 | if (avctx->codec_id == AV_CODEC_ID_PNG && |
1189 |
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|
74 | avctx->skip_frame == AVDISCARD_ALL) { |
1190 | 90 | return 0; | |
1191 | } | ||
1192 | |||
1193 |
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278 | if (CONFIG_APNG_DECODER && avctx->codec_id == AV_CODEC_ID_APNG && length == 0) { |
1194 |
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|
278 | if (!(s->pic_state & PNG_IDAT)) |
1195 | 16 | return 0; | |
1196 | else | ||
1197 | 583 | goto exit_loop; | |
1198 | } | ||
1199 | ✗ | av_log(avctx, AV_LOG_ERROR, "%d bytes left\n", length); | |
1200 | ✗ | if ( s->pic_state & PNG_ALLIMAGE | |
1201 | ✗ | && avctx->strict_std_compliance <= FF_COMPLIANCE_NORMAL) | |
1202 | ✗ | goto exit_loop; | |
1203 | ✗ | ret = AVERROR_INVALIDDATA; | |
1204 | 1 | goto fail; | |
1205 | } | ||
1206 | |||
1207 | 18141 | length = bytestream2_get_be32(&s->gb); | |
1208 |
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|
18141 | if (length > 0x7fffffff || length + 8 > bytestream2_get_bytes_left(&s->gb)) { |
1209 | 1 | av_log(avctx, AV_LOG_ERROR, "chunk too big\n"); | |
1210 | 1 | ret = AVERROR_INVALIDDATA; | |
1211 | 1 | goto fail; | |
1212 | } | ||
1213 |
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|
18140 | if (avctx->err_recognition & (AV_EF_CRCCHECK | AV_EF_IGNORE_ERR)) { |
1214 | ✗ | uint32_t crc_sig = AV_RB32(s->gb.buffer + length + 4); | |
1215 | ✗ | uint32_t crc_cal = ~av_crc(crc_tab, UINT32_MAX, s->gb.buffer, length + 4); | |
1216 | ✗ | if (crc_sig ^ crc_cal) { | |
1217 | ✗ | av_log(avctx, AV_LOG_ERROR, "CRC mismatch in chunk"); | |
1218 | ✗ | if (avctx->err_recognition & AV_EF_EXPLODE) { | |
1219 | ✗ | av_log(avctx, AV_LOG_ERROR, ", quitting\n"); | |
1220 | ✗ | ret = AVERROR_INVALIDDATA; | |
1221 | ✗ | goto fail; | |
1222 | } | ||
1223 | ✗ | av_log(avctx, AV_LOG_ERROR, ", skipping\n"); | |
1224 | ✗ | bytestream2_skip(&s->gb, length + 8); /* tag */ | |
1225 | } | ||
1226 | } | ||
1227 | 18140 | tag = bytestream2_get_le32(&s->gb); | |
1228 |
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|
18140 | if (avctx->debug & FF_DEBUG_STARTCODE) |
1229 | ✗ | av_log(avctx, AV_LOG_DEBUG, "png: tag=%s length=%u\n", | |
1230 | ✗ | av_fourcc2str(tag), length); | |
1231 | |||
1232 | 18140 | bytestream2_init(&gb_chunk, s->gb.buffer, length); | |
1233 | 18140 | bytestream2_skip(&s->gb, length + 4); | |
1234 | |||
1235 |
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|
18140 | if (avctx->codec_id == AV_CODEC_ID_PNG && |
1236 |
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|
14395 | avctx->skip_frame == AVDISCARD_ALL) { |
1237 |
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|
1423 | switch(tag) { |
1238 | 1259 | case MKTAG('I', 'H', 'D', 'R'): | |
1239 | case MKTAG('p', 'H', 'Y', 's'): | ||
1240 | case MKTAG('t', 'E', 'X', 't'): | ||
1241 | case MKTAG('I', 'D', 'A', 'T'): | ||
1242 | case MKTAG('t', 'R', 'N', 'S'): | ||
1243 | 1259 | break; | |
1244 | 164 | default: | |
1245 | 164 | continue; | |
1246 | } | ||
1247 | } | ||
1248 | |||
1249 |
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|
17976 | switch (tag) { |
1250 | 412 | case MKTAG('I', 'H', 'D', 'R'): | |
1251 |
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✓ Branch 2 taken 412 times.
|
412 | if ((ret = decode_ihdr_chunk(avctx, s, &gb_chunk)) < 0) |
1252 | ✗ | goto fail; | |
1253 | 412 | break; | |
1254 | 379 | case MKTAG('p', 'H', 'Y', 's'): | |
1255 |
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✓ Branch 2 taken 379 times.
|
379 | if ((ret = decode_phys_chunk(avctx, s, &gb_chunk)) < 0) |
1256 | ✗ | goto fail; | |
1257 | 379 | break; | |
1258 | 262 | case MKTAG('f', 'c', 'T', 'L'): | |
1259 |
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✓ Branch 1 taken 262 times.
|
262 | if (!CONFIG_APNG_DECODER || avctx->codec_id != AV_CODEC_ID_APNG) |
1260 | ✗ | continue; | |
1261 |
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✓ Branch 2 taken 262 times.
|
262 | if ((ret = decode_fctl_chunk(avctx, s, &gb_chunk)) < 0) |
1262 | ✗ | goto fail; | |
1263 | 262 | decode_next_dat = 1; | |
1264 | 262 | break; | |
1265 | 3120 | case MKTAG('f', 'd', 'A', 'T'): | |
1266 |
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✓ Branch 1 taken 3120 times.
|
3120 | if (!CONFIG_APNG_DECODER || avctx->codec_id != AV_CODEC_ID_APNG) |
1267 | ✗ | continue; | |
1268 |
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|
3120 | if (!decode_next_dat || bytestream2_get_bytes_left(&gb_chunk) < 4) { |
1269 | ✗ | ret = AVERROR_INVALIDDATA; | |
1270 | ✗ | goto fail; | |
1271 | } | ||
1272 | 3120 | bytestream2_get_be32(&gb_chunk); | |
1273 | /* fallthrough */ | ||
1274 | 16334 | case MKTAG('I', 'D', 'A', 'T'): | |
1275 |
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|
16334 | if (CONFIG_APNG_DECODER && avctx->codec_id == AV_CODEC_ID_APNG && !decode_next_dat) |
1276 | ✗ | continue; | |
1277 |
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|
16334 | if ((ret = decode_idat_chunk(avctx, s, &gb_chunk, p)) < 0) |
1278 | ✗ | goto fail; | |
1279 | 16334 | break; | |
1280 | 3 | case MKTAG('P', 'L', 'T', 'E'): | |
1281 | 3 | decode_plte_chunk(avctx, s, &gb_chunk); | |
1282 | 3 | break; | |
1283 | 7 | case MKTAG('t', 'R', 'N', 'S'): | |
1284 | 7 | decode_trns_chunk(avctx, s, &gb_chunk); | |
1285 | 7 | break; | |
1286 | 137 | case MKTAG('t', 'E', 'X', 't'): | |
1287 |
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|
137 | if (decode_text_chunk(s, &gb_chunk, 0) < 0) |
1288 | ✗ | av_log(avctx, AV_LOG_WARNING, "Broken tEXt chunk\n"); | |
1289 | 137 | break; | |
1290 | ✗ | case MKTAG('z', 'T', 'X', 't'): | |
1291 | ✗ | if (decode_text_chunk(s, &gb_chunk, 1) < 0) | |
1292 | ✗ | av_log(avctx, AV_LOG_WARNING, "Broken zTXt chunk\n"); | |
1293 | ✗ | break; | |
1294 | ✗ | case MKTAG('s', 'T', 'E', 'R'): { | |
1295 | ✗ | int mode = bytestream2_get_byte(&gb_chunk); | |
1296 | |||
1297 | ✗ | if (mode == 0 || mode == 1) { | |
1298 | ✗ | s->stereo_mode = mode; | |
1299 | } else { | ||
1300 | ✗ | av_log(avctx, AV_LOG_WARNING, | |
1301 | "Unknown value in sTER chunk (%d)\n", mode); | ||
1302 | } | ||
1303 | ✗ | break; | |
1304 | } | ||
1305 | 6 | case MKTAG('i', 'C', 'C', 'P'): { | |
1306 |
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✓ Branch 2 taken 6 times.
|
6 | if ((ret = decode_iccp_chunk(s, &gb_chunk, p)) < 0) |
1307 | ✗ | goto fail; | |
1308 | 6 | break; | |
1309 | } | ||
1310 | 4 | case MKTAG('c', 'H', 'R', 'M'): { | |
1311 | 4 | s->have_chrm = 1; | |
1312 | |||
1313 | 4 | s->white_point[0] = bytestream2_get_be32(&gb_chunk); | |
1314 | 4 | s->white_point[1] = bytestream2_get_be32(&gb_chunk); | |
1315 | |||
1316 | /* RGB Primaries */ | ||
1317 |
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|
16 | for (i = 0; i < 3; i++) { |
1318 | 12 | s->display_primaries[i][0] = bytestream2_get_be32(&gb_chunk); | |
1319 | 12 | s->display_primaries[i][1] = bytestream2_get_be32(&gb_chunk); | |
1320 | } | ||
1321 | |||
1322 | 4 | break; | |
1323 | } | ||
1324 | 18 | case MKTAG('g', 'A', 'M', 'A'): { | |
1325 | AVBPrint bp; | ||
1326 | char *gamma_str; | ||
1327 | 18 | int num = bytestream2_get_be32(&gb_chunk); | |
1328 | |||
1329 | 18 | av_bprint_init(&bp, 0, AV_BPRINT_SIZE_UNLIMITED); | |
1330 | 18 | av_bprintf(&bp, "%i/%i", num, 100000); | |
1331 | 18 | ret = av_bprint_finalize(&bp, &gamma_str); | |
1332 |
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|
18 | if (ret < 0) |
1333 | ✗ | return ret; | |
1334 | |||
1335 | 18 | av_dict_set(&s->frame_metadata, "gamma", gamma_str, AV_DICT_DONT_STRDUP_VAL); | |
1336 | |||
1337 | 18 | break; | |
1338 | } | ||
1339 | 321 | case MKTAG('I', 'E', 'N', 'D'): | |
1340 |
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|
321 | if (!(s->pic_state & PNG_ALLIMAGE)) |
1341 | ✗ | av_log(avctx, AV_LOG_ERROR, "IEND without all image\n"); | |
1342 |
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|
321 | if (!(s->pic_state & (PNG_ALLIMAGE|PNG_IDAT))) { |
1343 | ✗ | ret = AVERROR_INVALIDDATA; | |
1344 | ✗ | goto fail; | |
1345 | } | ||
1346 | 321 | goto exit_loop; | |
1347 | } | ||
1348 | } | ||
1349 | 583 | exit_loop: | |
1350 | |||
1351 |
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|
583 | if (avctx->codec_id == AV_CODEC_ID_PNG && |
1352 |
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|
321 | avctx->skip_frame == AVDISCARD_ALL) { |
1353 | ✗ | return 0; | |
1354 | } | ||
1355 | |||
1356 |
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|
583 | if (percent_missing(s) > avctx->discard_damaged_percentage) |
1357 | ✗ | return AVERROR_INVALIDDATA; | |
1358 | |||
1359 |
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583 | if (s->bits_per_pixel <= 4) |
1360 | ✗ | handle_small_bpp(s, p); | |
1361 | |||
1362 |
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|
583 | if (s->color_type == PNG_COLOR_TYPE_PALETTE && avctx->codec_id == AV_CODEC_ID_APNG) { |
1363 |
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|
6342 | for (int y = 0; y < s->height; y++) { |
1364 | 6300 | uint8_t *row = &p->data[0][p->linesize[0] * y]; | |
1365 | |||
1366 |
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|
951300 | for (int x = s->width - 1; x >= 0; x--) { |
1367 | 945000 | const uint8_t idx = row[x]; | |
1368 | |||
1369 | 945000 | row[4*x+2] = s->palette[idx] & 0xFF; | |
1370 | 945000 | row[4*x+1] = (s->palette[idx] >> 8 ) & 0xFF; | |
1371 | 945000 | row[4*x+0] = (s->palette[idx] >> 16) & 0xFF; | |
1372 | 945000 | row[4*x+3] = s->palette[idx] >> 24; | |
1373 | } | ||
1374 | } | ||
1375 | } | ||
1376 | |||
1377 | /* apply transparency if needed */ | ||
1378 |
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583 | if (s->has_trns && s->color_type != PNG_COLOR_TYPE_PALETTE) { |
1379 |
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|
136 | size_t byte_depth = s->bit_depth > 8 ? 2 : 1; |
1380 | 136 | size_t raw_bpp = s->bpp - byte_depth; | |
1381 | unsigned x, y; | ||
1382 | |||
1383 |
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|
136 | av_assert0(s->bit_depth > 1); |
1384 | |||
1385 |
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17746 | for (y = 0; y < s->height; ++y) { |
1386 | 17610 | uint8_t *row = &p->data[0][p->linesize[0] * y]; | |
1387 | |||
1388 |
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17610 | if (s->bpp == 2 && byte_depth == 1) { |
1389 | ✗ | uint8_t *pixel = &row[2 * s->width - 1]; | |
1390 | ✗ | uint8_t *rowp = &row[1 * s->width - 1]; | |
1391 | ✗ | int tcolor = s->transparent_color_be[0]; | |
1392 | ✗ | for (x = s->width; x > 0; --x) { | |
1393 | ✗ | *pixel-- = *rowp == tcolor ? 0 : 0xff; | |
1394 | ✗ | *pixel-- = *rowp--; | |
1395 | } | ||
1396 |
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35220 | } else if (s->bpp == 4 && byte_depth == 1) { |
1397 | 17610 | uint8_t *pixel = &row[4 * s->width - 1]; | |
1398 | 17610 | uint8_t *rowp = &row[3 * s->width - 1]; | |
1399 | 17610 | int tcolor = AV_RL24(s->transparent_color_be); | |
1400 |
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1595310 | for (x = s->width; x > 0; --x) { |
1401 |
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1577700 | *pixel-- = AV_RL24(rowp-2) == tcolor ? 0 : 0xff; |
1402 | 1577700 | *pixel-- = *rowp--; | |
1403 | 1577700 | *pixel-- = *rowp--; | |
1404 | 1577700 | *pixel-- = *rowp--; | |
1405 | } | ||
1406 | } else { | ||
1407 | /* since we're updating in-place, we have to go from right to left */ | ||
1408 | ✗ | for (x = s->width; x > 0; --x) { | |
1409 | ✗ | uint8_t *pixel = &row[s->bpp * (x - 1)]; | |
1410 | ✗ | memmove(pixel, &row[raw_bpp * (x - 1)], raw_bpp); | |
1411 | |||
1412 | ✗ | if (!memcmp(pixel, s->transparent_color_be, raw_bpp)) { | |
1413 | ✗ | memset(&pixel[raw_bpp], 0, byte_depth); | |
1414 | } else { | ||
1415 | ✗ | memset(&pixel[raw_bpp], 0xff, byte_depth); | |
1416 | } | ||
1417 | } | ||
1418 | } | ||
1419 | } | ||
1420 | } | ||
1421 | |||
1422 | /* handle P-frames only if a predecessor frame is available */ | ||
1423 |
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583 | if (s->last_picture.f->data[0]) { |
1424 |
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506 | if ( !(avpkt->flags & AV_PKT_FLAG_KEY) && avctx->codec_tag != AV_RL32("MPNG") |
1425 |
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61 | && s->last_picture.f->width == p->width |
1426 |
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61 | && s->last_picture.f->height== p->height |
1427 |
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61 | && s->last_picture.f->format== p->format |
1428 | ) { | ||
1429 |
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61 | if (CONFIG_PNG_DECODER && avctx->codec_id != AV_CODEC_ID_APNG) |
1430 | ✗ | handle_p_frame_png(s, p); | |
1431 | 61 | else if (CONFIG_APNG_DECODER && | |
1432 |
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|
122 | avctx->codec_id == AV_CODEC_ID_APNG && |
1433 | 61 | (ret = handle_p_frame_apng(avctx, s, p)) < 0) | |
1434 | ✗ | goto fail; | |
1435 | } | ||
1436 | } | ||
1437 | 583 | ff_thread_report_progress(&s->picture, INT_MAX, 0); | |
1438 | |||
1439 | 583 | return 0; | |
1440 | |||
1441 | 1 | fail: | |
1442 | 1 | ff_thread_report_progress(&s->picture, INT_MAX, 0); | |
1443 | 1 | return ret; | |
1444 | } | ||
1445 | |||
1446 | 658 | static void clear_frame_metadata(PNGDecContext *s) | |
1447 | { | ||
1448 | 658 | av_freep(&s->iccp_data); | |
1449 | 658 | s->iccp_data_len = 0; | |
1450 | 658 | s->iccp_name[0] = 0; | |
1451 | |||
1452 | 658 | s->stereo_mode = -1; | |
1453 | |||
1454 | 658 | s->have_chrm = 0; | |
1455 | |||
1456 | 658 | av_dict_free(&s->frame_metadata); | |
1457 | 658 | } | |
1458 | |||
1459 | 583 | static int output_frame(PNGDecContext *s, AVFrame *f, | |
1460 | const AVFrame *src) | ||
1461 | { | ||
1462 | int ret; | ||
1463 | |||
1464 | 583 | ret = av_frame_ref(f, src); | |
1465 |
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583 | if (ret < 0) |
1466 | ✗ | return ret; | |
1467 | |||
1468 |
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|
583 | if (s->iccp_data) { |
1469 | 6 | AVFrameSideData *sd = av_frame_new_side_data(f, AV_FRAME_DATA_ICC_PROFILE, s->iccp_data_len); | |
1470 |
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|
6 | if (!sd) { |
1471 | ✗ | ret = AVERROR(ENOMEM); | |
1472 | ✗ | goto fail; | |
1473 | } | ||
1474 | 6 | memcpy(sd->data, s->iccp_data, s->iccp_data_len); | |
1475 | |||
1476 | 6 | av_dict_set(&sd->metadata, "name", s->iccp_name, 0); | |
1477 | } | ||
1478 | |||
1479 |
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|
583 | if (s->stereo_mode >= 0) { |
1480 | ✗ | AVStereo3D *stereo3d = av_stereo3d_create_side_data(f); | |
1481 | ✗ | if (!stereo3d) { | |
1482 | ✗ | ret = AVERROR(ENOMEM); | |
1483 | ✗ | goto fail; | |
1484 | } | ||
1485 | |||
1486 | ✗ | stereo3d->type = AV_STEREO3D_SIDEBYSIDE; | |
1487 | ✗ | stereo3d->flags = s->stereo_mode ? 0 : AV_STEREO3D_FLAG_INVERT; | |
1488 | } | ||
1489 | |||
1490 |
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|
583 | if (s->have_chrm) { |
1491 | 4 | AVMasteringDisplayMetadata *mdm = av_mastering_display_metadata_create_side_data(f); | |
1492 |
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|
4 | if (!mdm) { |
1493 | ✗ | ret = AVERROR(ENOMEM); | |
1494 | ✗ | goto fail; | |
1495 | } | ||
1496 | |||
1497 | 4 | mdm->white_point[0] = av_make_q(s->white_point[0], 100000); | |
1498 | 4 | mdm->white_point[1] = av_make_q(s->white_point[1], 100000); | |
1499 | |||
1500 | /* RGB Primaries */ | ||
1501 |
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|
16 | for (int i = 0; i < 3; i++) { |
1502 | 12 | mdm->display_primaries[i][0] = av_make_q(s->display_primaries[i][0], 100000); | |
1503 | 12 | mdm->display_primaries[i][1] = av_make_q(s->display_primaries[i][1], 100000); | |
1504 | } | ||
1505 | |||
1506 | 4 | mdm->has_primaries = 1; | |
1507 | } | ||
1508 | |||
1509 | 583 | FFSWAP(AVDictionary*, f->metadata, s->frame_metadata); | |
1510 | |||
1511 | 583 | return 0; | |
1512 | ✗ | fail: | |
1513 | ✗ | av_frame_unref(f); | |
1514 | ✗ | return ret; | |
1515 | } | ||
1516 | |||
1517 | #if CONFIG_PNG_DECODER | ||
1518 | 396 | static int decode_frame_png(AVCodecContext *avctx, AVFrame *dst_frame, | |
1519 | int *got_frame, AVPacket *avpkt) | ||
1520 | { | ||
1521 | 396 | PNGDecContext *const s = avctx->priv_data; | |
1522 | 396 | const uint8_t *buf = avpkt->data; | |
1523 | 396 | int buf_size = avpkt->size; | |
1524 | 396 | AVFrame *p = s->picture.f; | |
1525 | int64_t sig; | ||
1526 | int ret; | ||
1527 | |||
1528 | 396 | clear_frame_metadata(s); | |
1529 | |||
1530 | 396 | bytestream2_init(&s->gb, buf, buf_size); | |
1531 | |||
1532 | /* check signature */ | ||
1533 | 396 | sig = bytestream2_get_be64(&s->gb); | |
1534 |
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396 | if (sig != PNGSIG && |
1535 | sig != MNGSIG) { | ||
1536 | ✗ | av_log(avctx, AV_LOG_ERROR, "Invalid PNG signature 0x%08"PRIX64".\n", sig); | |
1537 | ✗ | return AVERROR_INVALIDDATA; | |
1538 | } | ||
1539 | |||
1540 | 396 | s->y = s->has_trns = 0; | |
1541 | 396 | s->hdr_state = 0; | |
1542 | 396 | s->pic_state = 0; | |
1543 | |||
1544 | /* Reset z_stream */ | ||
1545 | 396 | ret = inflateReset(&s->zstream.zstream); | |
1546 |
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|
396 | if (ret != Z_OK) |
1547 | ✗ | return AVERROR_EXTERNAL; | |
1548 | |||
1549 |
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|
396 | if ((ret = decode_frame_common(avctx, s, p, avpkt)) < 0) |
1550 | 1 | goto the_end; | |
1551 | |||
1552 |
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|
395 | if (avctx->skip_frame == AVDISCARD_ALL) { |
1553 | 74 | *got_frame = 0; | |
1554 | 74 | ret = bytestream2_tell(&s->gb); | |
1555 | 74 | goto the_end; | |
1556 | } | ||
1557 | |||
1558 | 321 | ret = output_frame(s, dst_frame, s->picture.f); | |
1559 |
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|
321 | if (ret < 0) |
1560 | ✗ | goto the_end; | |
1561 | |||
1562 |
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|
321 | if (!(avctx->active_thread_type & FF_THREAD_FRAME)) { |
1563 | 321 | ff_thread_release_ext_buffer(avctx, &s->last_picture); | |
1564 | 321 | FFSWAP(ThreadFrame, s->picture, s->last_picture); | |
1565 | } | ||
1566 | |||
1567 | 321 | *got_frame = 1; | |
1568 | |||
1569 | 321 | ret = bytestream2_tell(&s->gb); | |
1570 | 396 | the_end: | |
1571 | 396 | s->crow_buf = NULL; | |
1572 | 396 | return ret; | |
1573 | } | ||
1574 | #endif | ||
1575 | |||
1576 | #if CONFIG_APNG_DECODER | ||
1577 | 262 | static int decode_frame_apng(AVCodecContext *avctx, AVFrame *dst_frame, | |
1578 | int *got_frame, AVPacket *avpkt) | ||
1579 | { | ||
1580 | 262 | PNGDecContext *const s = avctx->priv_data; | |
1581 | int ret; | ||
1582 | 262 | AVFrame *p = s->picture.f; | |
1583 | |||
1584 | 262 | clear_frame_metadata(s); | |
1585 | |||
1586 |
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|
262 | if (!(s->hdr_state & PNG_IHDR)) { |
1587 |
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16 | if (!avctx->extradata_size) |
1588 | ✗ | return AVERROR_INVALIDDATA; | |
1589 | |||
1590 |
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|
16 | if ((ret = inflateReset(&s->zstream.zstream)) != Z_OK) |
1591 | ✗ | return AVERROR_EXTERNAL; | |
1592 | 16 | bytestream2_init(&s->gb, avctx->extradata, avctx->extradata_size); | |
1593 |
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|
16 | if ((ret = decode_frame_common(avctx, s, p, avpkt)) < 0) |
1594 | ✗ | return ret; | |
1595 | } | ||
1596 | |||
1597 | /* reset state for a new frame */ | ||
1598 |
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|
262 | if ((ret = inflateReset(&s->zstream.zstream)) != Z_OK) |
1599 | ✗ | return AVERROR_EXTERNAL; | |
1600 | 262 | s->y = 0; | |
1601 | 262 | s->pic_state = 0; | |
1602 | 262 | bytestream2_init(&s->gb, avpkt->data, avpkt->size); | |
1603 |
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|
262 | if ((ret = decode_frame_common(avctx, s, p, avpkt)) < 0) |
1604 | ✗ | return ret; | |
1605 | |||
1606 |
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|
262 | if (!(s->pic_state & PNG_ALLIMAGE)) |
1607 | ✗ | av_log(avctx, AV_LOG_WARNING, "Frame did not contain a complete image\n"); | |
1608 |
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|
262 | if (!(s->pic_state & (PNG_ALLIMAGE|PNG_IDAT))) |
1609 | ✗ | return AVERROR_INVALIDDATA; | |
1610 | |||
1611 | 262 | ret = output_frame(s, dst_frame, s->picture.f); | |
1612 |
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|
262 | if (ret < 0) |
1613 | ✗ | return ret; | |
1614 | |||
1615 |
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|
262 | if (!(avctx->active_thread_type & FF_THREAD_FRAME)) { |
1616 |
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|
262 | if (s->dispose_op == APNG_DISPOSE_OP_PREVIOUS) { |
1617 | 1 | ff_thread_release_ext_buffer(avctx, &s->picture); | |
1618 | } else { | ||
1619 | 261 | ff_thread_release_ext_buffer(avctx, &s->last_picture); | |
1620 | 261 | FFSWAP(ThreadFrame, s->picture, s->last_picture); | |
1621 | } | ||
1622 | } | ||
1623 | |||
1624 | 262 | *got_frame = 1; | |
1625 | 262 | return bytestream2_tell(&s->gb); | |
1626 | } | ||
1627 | #endif | ||
1628 | |||
1629 | #if HAVE_THREADS | ||
1630 | ✗ | static int update_thread_context(AVCodecContext *dst, const AVCodecContext *src) | |
1631 | { | ||
1632 | ✗ | PNGDecContext *psrc = src->priv_data; | |
1633 | ✗ | PNGDecContext *pdst = dst->priv_data; | |
1634 | ✗ | ThreadFrame *src_frame = NULL; | |
1635 | int ret; | ||
1636 | |||
1637 | ✗ | if (dst == src) | |
1638 | ✗ | return 0; | |
1639 | |||
1640 | ✗ | if (CONFIG_APNG_DECODER && dst->codec_id == AV_CODEC_ID_APNG) { | |
1641 | |||
1642 | ✗ | pdst->width = psrc->width; | |
1643 | ✗ | pdst->height = psrc->height; | |
1644 | ✗ | pdst->bit_depth = psrc->bit_depth; | |
1645 | ✗ | pdst->color_type = psrc->color_type; | |
1646 | ✗ | pdst->compression_type = psrc->compression_type; | |
1647 | ✗ | pdst->interlace_type = psrc->interlace_type; | |
1648 | ✗ | pdst->filter_type = psrc->filter_type; | |
1649 | ✗ | pdst->cur_w = psrc->cur_w; | |
1650 | ✗ | pdst->cur_h = psrc->cur_h; | |
1651 | ✗ | pdst->x_offset = psrc->x_offset; | |
1652 | ✗ | pdst->y_offset = psrc->y_offset; | |
1653 | ✗ | pdst->has_trns = psrc->has_trns; | |
1654 | ✗ | memcpy(pdst->transparent_color_be, psrc->transparent_color_be, sizeof(pdst->transparent_color_be)); | |
1655 | |||
1656 | ✗ | pdst->dispose_op = psrc->dispose_op; | |
1657 | |||
1658 | ✗ | memcpy(pdst->palette, psrc->palette, sizeof(pdst->palette)); | |
1659 | |||
1660 | ✗ | pdst->hdr_state |= psrc->hdr_state; | |
1661 | } | ||
1662 | |||
1663 | ✗ | src_frame = psrc->dispose_op == APNG_DISPOSE_OP_PREVIOUS ? | |
1664 | ✗ | &psrc->last_picture : &psrc->picture; | |
1665 | |||
1666 | ✗ | ff_thread_release_ext_buffer(dst, &pdst->last_picture); | |
1667 | ✗ | if (src_frame && src_frame->f->data[0]) { | |
1668 | ✗ | ret = ff_thread_ref_frame(&pdst->last_picture, src_frame); | |
1669 | ✗ | if (ret < 0) | |
1670 | ✗ | return ret; | |
1671 | } | ||
1672 | |||
1673 | ✗ | return 0; | |
1674 | } | ||
1675 | #endif | ||
1676 | |||
1677 | 156 | static av_cold int png_dec_init(AVCodecContext *avctx) | |
1678 | { | ||
1679 | 156 | PNGDecContext *s = avctx->priv_data; | |
1680 | |||
1681 | 156 | avctx->color_range = AVCOL_RANGE_JPEG; | |
1682 | |||
1683 | 156 | s->avctx = avctx; | |
1684 | 156 | s->last_picture.f = av_frame_alloc(); | |
1685 | 156 | s->picture.f = av_frame_alloc(); | |
1686 |
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156 | if (!s->last_picture.f || !s->picture.f) |
1687 | ✗ | return AVERROR(ENOMEM); | |
1688 | |||
1689 | 156 | ff_pngdsp_init(&s->dsp); | |
1690 | |||
1691 | 156 | return ff_inflate_init(&s->zstream, avctx); | |
1692 | } | ||
1693 | |||
1694 | 156 | static av_cold int png_dec_end(AVCodecContext *avctx) | |
1695 | { | ||
1696 | 156 | PNGDecContext *s = avctx->priv_data; | |
1697 | |||
1698 | 156 | ff_thread_release_ext_buffer(avctx, &s->last_picture); | |
1699 | 156 | av_frame_free(&s->last_picture.f); | |
1700 | 156 | ff_thread_release_ext_buffer(avctx, &s->picture); | |
1701 | 156 | av_frame_free(&s->picture.f); | |
1702 | 156 | av_freep(&s->buffer); | |
1703 | 156 | s->buffer_size = 0; | |
1704 | 156 | av_freep(&s->last_row); | |
1705 | 156 | s->last_row_size = 0; | |
1706 | 156 | av_freep(&s->tmp_row); | |
1707 | 156 | s->tmp_row_size = 0; | |
1708 | 156 | av_freep(&s->background_buf); | |
1709 | |||
1710 | 156 | av_freep(&s->iccp_data); | |
1711 | 156 | av_dict_free(&s->frame_metadata); | |
1712 | 156 | ff_inflate_end(&s->zstream); | |
1713 | |||
1714 | 156 | return 0; | |
1715 | } | ||
1716 | |||
1717 | #if CONFIG_APNG_DECODER | ||
1718 | const FFCodec ff_apng_decoder = { | ||
1719 | .p.name = "apng", | ||
1720 | .p.long_name = NULL_IF_CONFIG_SMALL("APNG (Animated Portable Network Graphics) image"), | ||
1721 | .p.type = AVMEDIA_TYPE_VIDEO, | ||
1722 | .p.id = AV_CODEC_ID_APNG, | ||
1723 | .priv_data_size = sizeof(PNGDecContext), | ||
1724 | .init = png_dec_init, | ||
1725 | .close = png_dec_end, | ||
1726 | FF_CODEC_DECODE_CB(decode_frame_apng), | ||
1727 | .update_thread_context = ONLY_IF_THREADS_ENABLED(update_thread_context), | ||
1728 | .p.capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_FRAME_THREADS /*| AV_CODEC_CAP_DRAW_HORIZ_BAND*/, | ||
1729 | .caps_internal = FF_CODEC_CAP_INIT_THREADSAFE | FF_CODEC_CAP_INIT_CLEANUP | | ||
1730 | FF_CODEC_CAP_ALLOCATE_PROGRESS, | ||
1731 | }; | ||
1732 | #endif | ||
1733 | |||
1734 | #if CONFIG_PNG_DECODER | ||
1735 | const FFCodec ff_png_decoder = { | ||
1736 | .p.name = "png", | ||
1737 | .p.long_name = NULL_IF_CONFIG_SMALL("PNG (Portable Network Graphics) image"), | ||
1738 | .p.type = AVMEDIA_TYPE_VIDEO, | ||
1739 | .p.id = AV_CODEC_ID_PNG, | ||
1740 | .priv_data_size = sizeof(PNGDecContext), | ||
1741 | .init = png_dec_init, | ||
1742 | .close = png_dec_end, | ||
1743 | FF_CODEC_DECODE_CB(decode_frame_png), | ||
1744 | .update_thread_context = ONLY_IF_THREADS_ENABLED(update_thread_context), | ||
1745 | .p.capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_FRAME_THREADS /*| AV_CODEC_CAP_DRAW_HORIZ_BAND*/, | ||
1746 | .caps_internal = FF_CODEC_CAP_SKIP_FRAME_FILL_PARAM | FF_CODEC_CAP_INIT_THREADSAFE | | ||
1747 | FF_CODEC_CAP_ALLOCATE_PROGRESS | FF_CODEC_CAP_INIT_CLEANUP, | ||
1748 | }; | ||
1749 | #endif | ||
1750 |