FFmpeg coverage

Directory: ../../../ffmpeg/
File: src/libavcodec/iff.c
Date: 2022-01-23 21:51:25
Exec Total Coverage
Lines: 137 1088 12.6%
Branches: 78 822 9.5%
Line Branch Exec Source
1 /*
2 * IFF ACBM/ANIM/DEEP/ILBM/PBM/RGB8/RGBN bitmap decoder
3 * Copyright (c) 2010 Peter Ross <pross@xvid.org>
4 * Copyright (c) 2010 Sebastian Vater <cdgs.basty@googlemail.com>
5 * Copyright (c) 2016 Paul B Mahol
6 *
7 * This file is part of FFmpeg.
8 *
9 * FFmpeg is free software; you can redistribute it and/or
10 * modify it under the terms of the GNU Lesser General Public
11 * License as published by the Free Software Foundation; either
12 * version 2.1 of the License, or (at your option) any later version.
13 *
14 * FFmpeg is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
17 * Lesser General Public License for more details.
18 *
19 * You should have received a copy of the GNU Lesser General Public
20 * License along with FFmpeg; if not, write to the Free Software
21 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
22 */
23
24 /**
25 * @file
26 * IFF ACBM/ANIM/DEEP/ILBM/PBM/RGB8/RGBN bitmap decoder
27 */
28
29 #include <stdint.h>
30
31 #include "libavutil/imgutils.h"
32
33 #include "bytestream.h"
34 #include "avcodec.h"
35 #include "internal.h"
36 #include "mathops.h"
37
38 // TODO: masking bits
39 typedef enum {
40 MASK_NONE,
41 MASK_HAS_MASK,
42 MASK_HAS_TRANSPARENT_COLOR,
43 MASK_LASSO
44 } mask_type;
45
46 typedef struct IffContext {
47 AVFrame *frame;
48 int planesize;
49 uint8_t * planebuf;
50 uint8_t * ham_buf; ///< temporary buffer for planar to chunky conversation
51 uint32_t *ham_palbuf; ///< HAM decode table
52 uint32_t *mask_buf; ///< temporary buffer for palette indices
53 uint32_t *mask_palbuf; ///< masking palette table
54 unsigned compression; ///< delta compression method used
55 unsigned is_short; ///< short compression method used
56 unsigned is_interlaced;///< video is interlaced
57 unsigned is_brush; ///< video is in ANBR format
58 unsigned bpp; ///< bits per plane to decode (differs from bits_per_coded_sample if HAM)
59 unsigned ham; ///< 0 if non-HAM or number of hold bits (6 for bpp > 6, 4 otherwise)
60 unsigned flags; ///< 1 for EHB, 0 is no extra half darkening
61 unsigned transparency; ///< TODO: transparency color index in palette
62 unsigned masking; ///< TODO: masking method used
63 int init; // 1 if buffer and palette data already initialized, 0 otherwise
64 int16_t tvdc[16]; ///< TVDC lookup table
65 GetByteContext gb;
66 uint8_t *video[2];
67 unsigned video_size;
68 uint32_t *pal;
69 } IffContext;
70
71 #define LUT8_PART(plane, v) \
72 AV_LE2NE64C(UINT64_C(0x0000000)<<32 | v) << plane, \
73 AV_LE2NE64C(UINT64_C(0x1000000)<<32 | v) << plane, \
74 AV_LE2NE64C(UINT64_C(0x0010000)<<32 | v) << plane, \
75 AV_LE2NE64C(UINT64_C(0x1010000)<<32 | v) << plane, \
76 AV_LE2NE64C(UINT64_C(0x0000100)<<32 | v) << plane, \
77 AV_LE2NE64C(UINT64_C(0x1000100)<<32 | v) << plane, \
78 AV_LE2NE64C(UINT64_C(0x0010100)<<32 | v) << plane, \
79 AV_LE2NE64C(UINT64_C(0x1010100)<<32 | v) << plane, \
80 AV_LE2NE64C(UINT64_C(0x0000001)<<32 | v) << plane, \
81 AV_LE2NE64C(UINT64_C(0x1000001)<<32 | v) << plane, \
82 AV_LE2NE64C(UINT64_C(0x0010001)<<32 | v) << plane, \
83 AV_LE2NE64C(UINT64_C(0x1010001)<<32 | v) << plane, \
84 AV_LE2NE64C(UINT64_C(0x0000101)<<32 | v) << plane, \
85 AV_LE2NE64C(UINT64_C(0x1000101)<<32 | v) << plane, \
86 AV_LE2NE64C(UINT64_C(0x0010101)<<32 | v) << plane, \
87 AV_LE2NE64C(UINT64_C(0x1010101)<<32 | v) << plane
88
89 #define LUT8(plane) { \
90 LUT8_PART(plane, 0x0000000), \
91 LUT8_PART(plane, 0x1000000), \
92 LUT8_PART(plane, 0x0010000), \
93 LUT8_PART(plane, 0x1010000), \
94 LUT8_PART(plane, 0x0000100), \
95 LUT8_PART(plane, 0x1000100), \
96 LUT8_PART(plane, 0x0010100), \
97 LUT8_PART(plane, 0x1010100), \
98 LUT8_PART(plane, 0x0000001), \
99 LUT8_PART(plane, 0x1000001), \
100 LUT8_PART(plane, 0x0010001), \
101 LUT8_PART(plane, 0x1010001), \
102 LUT8_PART(plane, 0x0000101), \
103 LUT8_PART(plane, 0x1000101), \
104 LUT8_PART(plane, 0x0010101), \
105 LUT8_PART(plane, 0x1010101), \
106 }
107
108 // 8 planes * 8-bit mask
109 static const uint64_t plane8_lut[8][256] = {
110 LUT8(0), LUT8(1), LUT8(2), LUT8(3),
111 LUT8(4), LUT8(5), LUT8(6), LUT8(7),
112 };
113
114 #define LUT32(plane) { \
115 0, 0, 0, 0, \
116 0, 0, 0, 1U << plane, \
117 0, 0, 1U << plane, 0, \
118 0, 0, 1U << plane, 1U << plane, \
119 0, 1U << plane, 0, 0, \
120 0, 1U << plane, 0, 1U << plane, \
121 0, 1U << plane, 1U << plane, 0, \
122 0, 1U << plane, 1U << plane, 1U << plane, \
123 1U << plane, 0, 0, 0, \
124 1U << plane, 0, 0, 1U << plane, \
125 1U << plane, 0, 1U << plane, 0, \
126 1U << plane, 0, 1U << plane, 1U << plane, \
127 1U << plane, 1U << plane, 0, 0, \
128 1U << plane, 1U << plane, 0, 1U << plane, \
129 1U << plane, 1U << plane, 1U << plane, 0, \
130 1U << plane, 1U << plane, 1U << plane, 1U << plane, \
131 }
132
133 // 32 planes * 4-bit mask * 4 lookup tables each
134 static const uint32_t plane32_lut[32][16*4] = {
135 LUT32( 0), LUT32( 1), LUT32( 2), LUT32( 3),
136 LUT32( 4), LUT32( 5), LUT32( 6), LUT32( 7),
137 LUT32( 8), LUT32( 9), LUT32(10), LUT32(11),
138 LUT32(12), LUT32(13), LUT32(14), LUT32(15),
139 LUT32(16), LUT32(17), LUT32(18), LUT32(19),
140 LUT32(20), LUT32(21), LUT32(22), LUT32(23),
141 LUT32(24), LUT32(25), LUT32(26), LUT32(27),
142 LUT32(28), LUT32(29), LUT32(30), LUT32(31),
143 };
144
145 // Gray to RGB, required for palette table of grayscale images with bpp < 8
146 ✗ static av_always_inline uint32_t gray2rgb(const uint32_t x) {
147 ✗ return x << 16 | x << 8 | x;
148 }
149
150 /**
151 * Convert CMAP buffer (stored in extradata) to lavc palette format
152 */
153 2 static int cmap_read_palette(AVCodecContext *avctx, uint32_t *pal)
154 {
155 2 IffContext *s = avctx->priv_data;
156 int count, i;
157 2 const uint8_t *const palette = avctx->extradata + AV_RB16(avctx->extradata);
158 2 int palette_size = avctx->extradata_size - AV_RB16(avctx->extradata);
159
160
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 2 if (avctx->bits_per_coded_sample > 8) {
161 ✗ av_log(avctx, AV_LOG_ERROR, "bits_per_coded_sample > 8 not supported\n");
162 ✗ return AVERROR_INVALIDDATA;
163 }
164
165 2 count = 1 << avctx->bits_per_coded_sample;
166 // If extradata is smaller than actually needed, fill the remaining with black.
167 2 count = FFMIN(palette_size / 3, count);
168
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 2 if (count) {
169
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 514 for (i = 0; i < count; i++)
170 512 pal[i] = 0xFF000000 | AV_RB24(palette + i*3);
171
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 2 if (s->flags && count >= 32) { // EHB
172 ✗ for (i = 0; i < 32; i++)
173 ✗ pal[i + 32] = 0xFF000000 | (AV_RB24(palette + i*3) & 0xFEFEFE) >> 1;
174 ✗ count = FFMAX(count, 64);
175 }
176 } else { // Create gray-scale color palette for bps < 8
177 ✗ count = 1 << avctx->bits_per_coded_sample;
178
179 ✗ for (i = 0; i < count; i++)
180 ✗ pal[i] = 0xFF000000 | gray2rgb((i * 255) >> avctx->bits_per_coded_sample);
181 }
182
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 2 if (s->masking == MASK_HAS_MASK) {
183 ✗ if ((1 << avctx->bits_per_coded_sample) < count) {
184 ✗ avpriv_request_sample(avctx, "overlapping mask");
185 ✗ return AVERROR_PATCHWELCOME;
186 }
187 ✗ memcpy(pal + (1 << avctx->bits_per_coded_sample), pal, count * 4);
188 ✗ for (i = 0; i < count; i++)
189 ✗ pal[i] &= 0xFFFFFF;
190
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 2 } else if (s->masking == MASK_HAS_TRANSPARENT_COLOR &&
191 ✗ s->transparency < 1 << avctx->bits_per_coded_sample)
192 ✗ pal[s->transparency] &= 0xFFFFFF;
193 2 return 0;
194 }
195
196 /**
197 * Extracts the IFF extra context and updates internal
198 * decoder structures.
199 *
200 * @param avctx the AVCodecContext where to extract extra context to
201 * @param avpkt the AVPacket to extract extra context from or NULL to use avctx
202 * @return >= 0 in case of success, a negative error code otherwise
203 */
204 6 static int extract_header(AVCodecContext *const avctx,
205 const AVPacket *const avpkt)
206 {
207 6 IffContext *s = avctx->priv_data;
208 const uint8_t *buf;
209 6 unsigned buf_size = 0;
210 int i, palette_size;
211
212
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 6 if (avctx->extradata_size < 2) {
213 ✗ av_log(avctx, AV_LOG_ERROR, "not enough extradata\n");
214 ✗ return AVERROR_INVALIDDATA;
215 }
216 6 palette_size = avctx->extradata_size - AV_RB16(avctx->extradata);
217
218
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 6 if (avpkt && avctx->codec_tag == MKTAG('A', 'N', 'I', 'M')) {
219 uint32_t chunk_id;
220 uint64_t data_size;
221 ✗ GetByteContext *gb = &s->gb;
222
223 ✗ bytestream2_skip(gb, 4);
224 ✗ while (bytestream2_get_bytes_left(gb) >= 1) {
225 ✗ chunk_id = bytestream2_get_le32(gb);
226 ✗ data_size = bytestream2_get_be32(gb);
227
228 ✗ if (chunk_id == MKTAG('B', 'M', 'H', 'D')) {
229 ✗ bytestream2_skip(gb, data_size + (data_size & 1));
230 ✗ } else if (chunk_id == MKTAG('A', 'N', 'H', 'D')) {
231 unsigned extra;
232 ✗ if (data_size < 40)
233 ✗ return AVERROR_INVALIDDATA;
234
235 ✗ s->compression = (bytestream2_get_byte(gb) << 8) | (s->compression & 0xFF);
236 ✗ bytestream2_skip(gb, 19);
237 ✗ extra = bytestream2_get_be32(gb);
238 ✗ s->is_short = !(extra & 1);
239 ✗ s->is_brush = extra == 2;
240 ✗ s->is_interlaced = !!(extra & 0x40);
241 ✗ data_size -= 24;
242 ✗ bytestream2_skip(gb, data_size + (data_size & 1));
243 ✗ } else if (chunk_id == MKTAG('D', 'L', 'T', 'A') ||
244 chunk_id == MKTAG('B', 'O', 'D', 'Y')) {
245 ✗ if (chunk_id == MKTAG('B','O','D','Y'))
246 ✗ s->compression &= 0xFF;
247 ✗ break;
248 ✗ } else if (chunk_id == MKTAG('C', 'M', 'A', 'P')) {
249 ✗ int count = data_size / 3;
250 ✗ uint32_t *pal = s->pal;
251
252 ✗ if (count > 256)
253 ✗ return AVERROR_INVALIDDATA;
254 ✗ if (s->ham) {
255 ✗ for (i = 0; i < count; i++)
256 ✗ pal[i] = 0xFF000000 | bytestream2_get_le24(gb);
257 } else {
258 ✗ for (i = 0; i < count; i++)
259 ✗ pal[i] = 0xFF000000 | bytestream2_get_be24(gb);
260 }
261 ✗ bytestream2_skip(gb, data_size & 1);
262 } else {
263 ✗ bytestream2_skip(gb, data_size + (data_size&1));
264 }
265 }
266
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 6 } else if (!avpkt) {
267 4 buf = avctx->extradata;
268 4 buf_size = bytestream_get_be16(&buf);
269
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 4 if (buf_size <= 1 || palette_size < 0) {
270 ✗ av_log(avctx, AV_LOG_ERROR,
271 "Invalid palette size received: %u -> palette data offset: %d\n",
272 buf_size, palette_size);
273 ✗ return AVERROR_INVALIDDATA;
274 }
275 }
276
277
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 6 if (buf_size >= 41) {
278 4 s->compression = bytestream_get_byte(&buf);
279 4 s->bpp = bytestream_get_byte(&buf);
280 4 s->ham = bytestream_get_byte(&buf);
281 4 s->flags = bytestream_get_byte(&buf);
282 4 s->transparency = bytestream_get_be16(&buf);
283 4 s->masking = bytestream_get_byte(&buf);
284
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 68 for (i = 0; i < 16; i++)
285 64 s->tvdc[i] = bytestream_get_be16(&buf);
286
287
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 4 if (s->ham) {
288 ✗ if (s->bpp > 8) {
289 ✗ av_log(avctx, AV_LOG_ERROR, "Invalid number of hold bits for HAM: %u\n", s->ham);
290 ✗ return AVERROR_INVALIDDATA;
291 ✗ } else if (s->ham != (s->bpp > 6 ? 6 : 4)) {
292 ✗ av_log(avctx, AV_LOG_ERROR, "Invalid number of hold bits for HAM: %u, BPP: %u\n", s->ham, s->bpp);
293 ✗ return AVERROR_INVALIDDATA;
294 }
295 }
296
297
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 4 if (s->masking == MASK_HAS_MASK) {
298 ✗ if (s->bpp >= 8 && !s->ham) {
299 ✗ avctx->pix_fmt = AV_PIX_FMT_RGB32;
300 ✗ av_freep(&s->mask_buf);
301 ✗ av_freep(&s->mask_palbuf);
302 ✗ if (s->bpp > 16) {
303 ✗ av_log(avctx, AV_LOG_ERROR, "bpp %d too large for palette\n", s->bpp);
304 ✗ return AVERROR(ENOMEM);
305 }
306 ✗ s->mask_buf = av_malloc((s->planesize * 32) + AV_INPUT_BUFFER_PADDING_SIZE);
307 ✗ if (!s->mask_buf)
308 ✗ return AVERROR(ENOMEM);
309 ✗ s->mask_palbuf = av_malloc((2 << s->bpp) * sizeof(uint32_t) + AV_INPUT_BUFFER_PADDING_SIZE);
310 ✗ if (!s->mask_palbuf) {
311 ✗ av_freep(&s->mask_buf);
312 ✗ return AVERROR(ENOMEM);
313 }
314 }
315 ✗ s->bpp++;
316
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 4 } else if (s->masking != MASK_NONE && s->masking != MASK_HAS_TRANSPARENT_COLOR) {
317 ✗ av_log(avctx, AV_LOG_ERROR, "Masking not supported\n");
318 ✗ return AVERROR_PATCHWELCOME;
319 }
320
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 4 if (!s->bpp || s->bpp > 32) {
321 ✗ av_log(avctx, AV_LOG_ERROR, "Invalid number of bitplanes: %u\n", s->bpp);
322 ✗ return AVERROR_INVALIDDATA;
323 }
324
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 4 if (s->video_size && s->planesize * s->bpp * avctx->height > s->video_size)
325 ✗ return AVERROR_INVALIDDATA;
326
327 4 av_freep(&s->ham_buf);
328 4 av_freep(&s->ham_palbuf);
329
330
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 4 if (s->ham) {
331 ✗ int i, count = FFMIN(palette_size / 3, 1 << s->ham);
332 int ham_count;
333 ✗ const uint8_t *const palette = avctx->extradata + AV_RB16(avctx->extradata);
334 ✗ int extra_space = 1;
335
336 ✗ if (avctx->codec_tag == MKTAG('P', 'B', 'M', ' ') && s->ham == 4)
337 ✗ extra_space = 4;
338
339 ✗ s->ham_buf = av_malloc((s->planesize * 8) + AV_INPUT_BUFFER_PADDING_SIZE);
340 ✗ if (!s->ham_buf)
341 ✗ return AVERROR(ENOMEM);
342
343 ✗ ham_count = 8 * (1 << s->ham);
344 ✗ s->ham_palbuf = av_malloc(extra_space * (ham_count << !!(s->masking == MASK_HAS_MASK)) * sizeof (uint32_t) + AV_INPUT_BUFFER_PADDING_SIZE);
345 ✗ if (!s->ham_palbuf) {
346 ✗ av_freep(&s->ham_buf);
347 ✗ return AVERROR(ENOMEM);
348 }
349
350 ✗ if (count) { // HAM with color palette attached
351 // prefill with black and palette and set HAM take direct value mask to zero
352 ✗ memset(s->ham_palbuf, 0, (1 << s->ham) * 2 * sizeof (uint32_t));
353 ✗ for (i=0; i < count; i++) {
354 ✗ s->ham_palbuf[i*2+1] = 0xFF000000 | AV_RL24(palette + i*3);
355 }
356 ✗ count = 1 << s->ham;
357 } else { // HAM with grayscale color palette
358 ✗ count = 1 << s->ham;
359 ✗ for (i=0; i < count; i++) {
360 ✗ s->ham_palbuf[i*2] = 0xFF000000; // take direct color value from palette
361 ✗ s->ham_palbuf[i*2+1] = 0xFF000000 | av_le2ne32(gray2rgb((i * 255) >> s->ham));
362 }
363 }
364 ✗ for (i=0; i < count; i++) {
365 ✗ uint32_t tmp = i << (8 - s->ham);
366 ✗ tmp |= tmp >> s->ham;
367 ✗ s->ham_palbuf[(i+count)*2] = 0xFF00FFFF; // just modify blue color component
368 ✗ s->ham_palbuf[(i+count*2)*2] = 0xFFFFFF00; // just modify red color component
369 ✗ s->ham_palbuf[(i+count*3)*2] = 0xFFFF00FF; // just modify green color component
370 ✗ s->ham_palbuf[(i+count)*2+1] = 0xFF000000 | tmp << 16;
371 ✗ s->ham_palbuf[(i+count*2)*2+1] = 0xFF000000 | tmp;
372 ✗ s->ham_palbuf[(i+count*3)*2+1] = 0xFF000000 | tmp << 8;
373 }
374 ✗ if (s->masking == MASK_HAS_MASK) {
375 ✗ for (i = 0; i < ham_count; i++)
376 ✗ s->ham_palbuf[(1 << s->bpp) + i] = s->ham_palbuf[i] | 0xFF000000;
377 }
378 }
379 }
380
381 6 return 0;
382 }
383
384 4 static av_cold int decode_end(AVCodecContext *avctx)
385 {
386 4 IffContext *s = avctx->priv_data;
387 4 av_freep(&s->planebuf);
388 4 av_freep(&s->ham_buf);
389 4 av_freep(&s->ham_palbuf);
390 4 av_freep(&s->mask_buf);
391 4 av_freep(&s->mask_palbuf);
392 4 av_freep(&s->video[0]);
393 4 av_freep(&s->video[1]);
394 4 av_freep(&s->pal);
395 4 return 0;
396 }
397
398 4 static av_cold int decode_init(AVCodecContext *avctx)
399 {
400 4 IffContext *s = avctx->priv_data;
401 int err;
402
403
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 4 if (avctx->bits_per_coded_sample <= 8) {
404 int palette_size;
405
406
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 4 if (avctx->extradata_size >= 2)
407 4 palette_size = avctx->extradata_size - AV_RB16(avctx->extradata);
408 else
409 ✗ palette_size = 0;
410 4 avctx->pix_fmt = (avctx->bits_per_coded_sample < 8) ||
411
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 4 (avctx->extradata_size >= 2 && palette_size) ? AV_PIX_FMT_PAL8 : AV_PIX_FMT_GRAY8;
412 ✗ } else if (avctx->bits_per_coded_sample <= 32) {
413 ✗ if (avctx->codec_tag == MKTAG('R', 'G', 'B', '8')) {
414 ✗ avctx->pix_fmt = AV_PIX_FMT_RGB32;
415 ✗ } else if (avctx->codec_tag == MKTAG('R', 'G', 'B', 'N')) {
416 ✗ avctx->pix_fmt = AV_PIX_FMT_RGB444;
417 ✗ } else if (avctx->codec_tag != MKTAG('D', 'E', 'E', 'P')) {
418 ✗ if (avctx->bits_per_coded_sample == 24) {
419 ✗ avctx->pix_fmt = AV_PIX_FMT_0BGR32;
420 ✗ } else if (avctx->bits_per_coded_sample == 32) {
421 ✗ avctx->pix_fmt = AV_PIX_FMT_BGR32;
422 } else {
423 ✗ avpriv_request_sample(avctx, "unknown bits_per_coded_sample");
424 ✗ return AVERROR_PATCHWELCOME;
425 }
426 }
427 } else {
428 ✗ return AVERROR_INVALIDDATA;
429 }
430
431
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 4 if ((err = av_image_check_size(avctx->width, avctx->height, 0, avctx)))
432 ✗ return err;
433 4 s->planesize = FFALIGN(avctx->width, 16) >> 3; // Align plane size in bits to word-boundary
434 4 s->planebuf = av_malloc(s->planesize * avctx->height + AV_INPUT_BUFFER_PADDING_SIZE);
435
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 4 if (!s->planebuf)
436 ✗ return AVERROR(ENOMEM);
437
438 4 s->bpp = avctx->bits_per_coded_sample;
439
440
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 4 if (avctx->codec_tag == MKTAG('A', 'N', 'I', 'M')) {
441 ✗ s->video_size = FFALIGN(avctx->width, 2) * avctx->height * s->bpp;
442 ✗ if (!s->video_size)
443 ✗ return AVERROR_INVALIDDATA;
444 ✗ s->video[0] = av_calloc(FFALIGN(avctx->width, 2) * avctx->height, s->bpp);
445 ✗ s->video[1] = av_calloc(FFALIGN(avctx->width, 2) * avctx->height, s->bpp);
446 ✗ s->pal = av_calloc(256, sizeof(*s->pal));
447 ✗ if (!s->video[0] || !s->video[1] || !s->pal)
448 ✗ return AVERROR(ENOMEM);
449 }
450
451
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 4 if ((err = extract_header(avctx, NULL)) < 0)
452 ✗ return err;
453
454 4 return 0;
455 }
456
457 /**
458 * Decode interleaved plane buffer up to 8bpp
459 * @param dst Destination buffer
460 * @param buf Source buffer
461 * @param buf_size
462 * @param plane plane number to decode as
463 */
464 1920 static void decodeplane8(uint8_t *dst, const uint8_t *buf, int buf_size, int plane)
465 {
466 const uint64_t *lut;
467
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 1920 if (plane >= 8) {
468 ✗ av_log(NULL, AV_LOG_WARNING, "Ignoring extra planes beyond 8\n");
469 ✗ return;
470 }
471 1920 lut = plane8_lut[plane];
472 do {
473 76800 uint64_t v = AV_RN64A(dst) | lut[*buf++];
474 76800 AV_WN64A(dst, v);
475 76800 dst += 8;
476
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 76800 } while (--buf_size);
477 }
478
479 /**
480 * Decode interleaved plane buffer up to 24bpp
481 * @param dst Destination buffer
482 * @param buf Source buffer
483 * @param buf_size
484 * @param plane plane number to decode as
485 */
486 ✗ static void decodeplane32(uint32_t *dst, const uint8_t *buf, int buf_size, int plane)
487 {
488 ✗ const uint32_t *lut = plane32_lut[plane];
489 do {
490 ✗ unsigned mask = (*buf >> 2) & ~3;
491 ✗ dst[0] |= lut[mask++];
492 ✗ dst[1] |= lut[mask++];
493 ✗ dst[2] |= lut[mask++];
494 ✗ dst[3] |= lut[mask];
495 ✗ mask = (*buf++ << 2) & 0x3F;
496 ✗ dst[4] |= lut[mask++];
497 ✗ dst[5] |= lut[mask++];
498 ✗ dst[6] |= lut[mask++];
499 ✗ dst[7] |= lut[mask];
500 ✗ dst += 8;
501 ✗ } while (--buf_size);
502 }
503
504 #define DECODE_HAM_PLANE32(x) \
505 first = buf[x] << 1; \
506 second = buf[(x)+1] << 1; \
507 delta &= pal[first++]; \
508 delta |= pal[first]; \
509 dst[x] = delta; \
510 delta &= pal[second++]; \
511 delta |= pal[second]; \
512 dst[(x)+1] = delta
513
514 /**
515 * Converts one line of HAM6/8-encoded chunky buffer to 24bpp.
516 *
517 * @param dst the destination 24bpp buffer
518 * @param buf the source 8bpp chunky buffer
519 * @param pal the HAM decode table
520 * @param buf_size the plane size in bytes
521 */
522 ✗ static void decode_ham_plane32(uint32_t *dst, const uint8_t *buf,
523 const uint32_t *const pal, unsigned buf_size)
524 {
525 ✗ uint32_t delta = pal[1]; /* first palette entry */
526 do {
527 uint32_t first, second;
528 ✗ DECODE_HAM_PLANE32(0);
529 ✗ DECODE_HAM_PLANE32(2);
530 ✗ DECODE_HAM_PLANE32(4);
531 ✗ DECODE_HAM_PLANE32(6);
532 ✗ buf += 8;
533 ✗ dst += 8;
534 ✗ } while (--buf_size);
535 }
536
537 ✗ static void lookup_pal_indicies(uint32_t *dst, const uint32_t *buf,
538 const uint32_t *const pal, unsigned width)
539 {
540 do {
541 ✗ *dst++ = pal[*buf++];
542 ✗ } while (--width);
543 }
544
545 /**
546 * Decode one complete byterun1 encoded line.
547 *
548 * @param dst the destination buffer where to store decompressed bitstream
549 * @param dst_size the destination plane size in bytes
550 * @param buf the source byterun1 compressed bitstream
551 * @param buf_end the EOF of source byterun1 compressed bitstream
552 * @return number of consumed bytes in byterun1 compressed bitstream
553 */
554 240 static int decode_byterun(uint8_t *dst, int dst_size,
555 GetByteContext *gb)
556 {
557 unsigned x;
558
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 10365 for (x = 0; x < dst_size && bytestream2_get_bytes_left(gb) > 0;) {
559 unsigned length;
560 10125 const int8_t value = bytestream2_get_byte(gb);
561
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 10125 if (value >= 0) {
562
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 4486 length = FFMIN3(value + 1, dst_size - x, bytestream2_get_bytes_left(gb));
563 4486 bytestream2_get_buffer(gb, dst + x, length);
564
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 4486 if (length < value + 1)
565 ✗ bytestream2_skip(gb, value + 1 - length);
566
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 5639 } else if (value > -128) {
567 5639 length = FFMIN(-value + 1, dst_size - x);
568 5639 memset(dst + x, bytestream2_get_byte(gb), length);
569 } else { // noop
570 ✗ continue;
571 }
572 10125 x += length;
573 }
574
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 240 if (x < dst_size) {
575 ✗ av_log(NULL, AV_LOG_WARNING, "decode_byterun ended before plane size\n");
576 ✗ memset(dst+x, 0, dst_size - x);
577 }
578 240 return bytestream2_tell(gb);
579 }
580
581 ✗ static int decode_byterun2(uint8_t *dst, int height, int line_size,
582 GetByteContext *gb)
583 {
584 GetByteContext cmds;
585 unsigned count;
586 ✗ int i, y_pos = 0, x_pos = 0;
587
588 ✗ if (bytestream2_get_be32(gb) != MKBETAG('V', 'D', 'A', 'T'))
589 ✗ return 0;
590
591 ✗ bytestream2_skip(gb, 4);
592 ✗ count = bytestream2_get_be16(gb) - 2;
593 ✗ if (bytestream2_get_bytes_left(gb) < count)
594 ✗ return 0;
595
596 ✗ bytestream2_init(&cmds, gb->buffer, count);
597 ✗ bytestream2_skip(gb, count);
598
599 ✗ for (i = 0; i < count && x_pos < line_size; i++) {
600 ✗ int8_t cmd = bytestream2_get_byte(&cmds);
601 int l, r;
602
603 ✗ if (cmd == 0) {
604 ✗ l = bytestream2_get_be16(gb);
605 ✗ while (l-- > 0 && x_pos < line_size) {
606 ✗ dst[x_pos + y_pos * line_size ] = bytestream2_get_byte(gb);
607 ✗ dst[x_pos + y_pos++ * line_size + 1] = bytestream2_get_byte(gb);
608 ✗ if (y_pos >= height) {
609 ✗ y_pos = 0;
610 ✗ x_pos += 2;
611 }
612 }
613 ✗ } else if (cmd < 0) {
614 ✗ l = -cmd;
615 ✗ while (l-- > 0 && x_pos < line_size) {
616 ✗ dst[x_pos + y_pos * line_size ] = bytestream2_get_byte(gb);
617 ✗ dst[x_pos + y_pos++ * line_size + 1] = bytestream2_get_byte(gb);
618 ✗ if (y_pos >= height) {
619 ✗ y_pos = 0;
620 ✗ x_pos += 2;
621 }
622 }
623 ✗ } else if (cmd == 1) {
624 ✗ l = bytestream2_get_be16(gb);
625 ✗ r = bytestream2_get_be16(gb);
626 ✗ while (l-- > 0 && x_pos < line_size) {
627 ✗ dst[x_pos + y_pos * line_size ] = r >> 8;
628 ✗ dst[x_pos + y_pos++ * line_size + 1] = r & 0xFF;
629 ✗ if (y_pos >= height) {
630 ✗ y_pos = 0;
631 ✗ x_pos += 2;
632 }
633 }
634 } else {
635 ✗ l = cmd;
636 ✗ r = bytestream2_get_be16(gb);
637 ✗ while (l-- > 0 && x_pos < line_size) {
638 ✗ dst[x_pos + y_pos * line_size ] = r >> 8;
639 ✗ dst[x_pos + y_pos++ * line_size + 1] = r & 0xFF;
640 ✗ if (y_pos >= height) {
641 ✗ y_pos = 0;
642 ✗ x_pos += 2;
643 }
644 }
645 }
646 }
647
648 ✗ return bytestream2_tell(gb);
649 }
650
651 #define DECODE_RGBX_COMMON(type) \
652 if (!length) { \
653 length = bytestream2_get_byte(gb); \
654 if (!length) { \
655 length = bytestream2_get_be16(gb); \
656 if (!length) \
657 return; \
658 } \
659 } \
660 for (i = 0; i < length; i++) { \
661 *(type *)(dst + y*linesize + x * sizeof(type)) = pixel; \
662 x += 1; \
663 if (x >= width) { \
664 y += 1; \
665 if (y >= height) \
666 return; \
667 x = 0; \
668 } \
669 }
670
671 /**
672 * Decode RGB8 buffer
673 * @param[out] dst Destination buffer
674 * @param width Width of destination buffer (pixels)
675 * @param height Height of destination buffer (pixels)
676 * @param linesize Line size of destination buffer (bytes)
677 */
678 ✗ static void decode_rgb8(GetByteContext *gb, uint8_t *dst, int width, int height, int linesize)
679 {
680 ✗ int x = 0, y = 0, i, length;
681 ✗ while (bytestream2_get_bytes_left(gb) >= 4) {
682 ✗ uint32_t pixel = 0xFF000000 | bytestream2_get_be24(gb);
683 ✗ length = bytestream2_get_byte(gb) & 0x7F;
684 ✗ DECODE_RGBX_COMMON(uint32_t)
685 }
686 }
687
688 /**
689 * Decode RGBN buffer
690 * @param[out] dst Destination buffer
691 * @param width Width of destination buffer (pixels)
692 * @param height Height of destination buffer (pixels)
693 * @param linesize Line size of destination buffer (bytes)
694 */
695 ✗ static void decode_rgbn(GetByteContext *gb, uint8_t *dst, int width, int height, int linesize)
696 {
697 ✗ int x = 0, y = 0, i, length;
698 ✗ while (bytestream2_get_bytes_left(gb) >= 2) {
699 ✗ uint32_t pixel = bytestream2_get_be16u(gb);
700 ✗ length = pixel & 0x7;
701 ✗ pixel >>= 4;
702 ✗ DECODE_RGBX_COMMON(uint16_t)
703 }
704 }
705
706 /**
707 * Decode DEEP RLE 32-bit buffer
708 * @param[out] dst Destination buffer
709 * @param[in] src Source buffer
710 * @param src_size Source buffer size (bytes)
711 * @param width Width of destination buffer (pixels)
712 * @param height Height of destination buffer (pixels)
713 * @param linesize Line size of destination buffer (bytes)
714 */
715 ✗ static void decode_deep_rle32(uint8_t *dst, const uint8_t *src, int src_size, int width, int height, int linesize)
716 {
717 ✗ const uint8_t *src_end = src + src_size;
718 ✗ int x = 0, y = 0, i;
719 ✗ while (src_end - src >= 5) {
720 int opcode;
721 ✗ opcode = *(int8_t *)src++;
722 ✗ if (opcode >= 0) {
723 ✗ int size = opcode + 1;
724 ✗ for (i = 0; i < size; i++) {
725 ✗ int length = FFMIN(size - i, width - x);
726 ✗ if (src_end - src < length * 4)
727 ✗ return;
728 ✗ memcpy(dst + y*linesize + x * 4, src, length * 4);
729 ✗ src += length * 4;
730 ✗ x += length;
731 ✗ i += length;
732 ✗ if (x >= width) {
733 ✗ x = 0;
734 ✗ y += 1;
735 ✗ if (y >= height)
736 ✗ return;
737 }
738 }
739 } else {
740 ✗ int size = -opcode + 1;
741 ✗ uint32_t pixel = AV_RN32(src);
742 ✗ for (i = 0; i < size; i++) {
743 ✗ *(uint32_t *)(dst + y*linesize + x * 4) = pixel;
744 ✗ x += 1;
745 ✗ if (x >= width) {
746 ✗ x = 0;
747 ✗ y += 1;
748 ✗ if (y >= height)
749 ✗ return;
750 }
751 }
752 ✗ src += 4;
753 }
754 }
755 }
756
757 /**
758 * Decode DEEP TVDC 32-bit buffer
759 * @param[out] dst Destination buffer
760 * @param[in] src Source buffer
761 * @param src_size Source buffer size (bytes)
762 * @param width Width of destination buffer (pixels)
763 * @param height Height of destination buffer (pixels)
764 * @param linesize Line size of destination buffer (bytes)
765 * @param[int] tvdc TVDC lookup table
766 */
767 ✗ static void decode_deep_tvdc32(uint8_t *dst, const uint8_t *src, int src_size, int width, int height, int linesize, const int16_t *tvdc)
768 {
769 ✗ int x = 0, y = 0, plane = 0;
770 ✗ int8_t pixel = 0;
771 int i, j;
772
773 ✗ for (i = 0; i < src_size * 2;) {
774 #define GETNIBBLE ((i & 1) ? (src[i>>1] & 0xF) : (src[i>>1] >> 4))
775 ✗ int d = tvdc[GETNIBBLE];
776 ✗ i++;
777 ✗ if (d) {
778 ✗ pixel += d;
779 ✗ dst[y * linesize + x*4 + plane] = pixel;
780 ✗ x++;
781 } else {
782 ✗ if (i >= src_size * 2)
783 ✗ return;
784 ✗ d = GETNIBBLE + 1;
785 ✗ i++;
786 ✗ d = FFMIN(d, width - x);
787 ✗ for (j = 0; j < d; j++) {
788 ✗ dst[y * linesize + x*4 + plane] = pixel;
789 ✗ x++;
790 }
791 }
792 ✗ if (x >= width) {
793 ✗ plane++;
794 ✗ if (plane >= 4) {
795 ✗ y++;
796 ✗ if (y >= height)
797 ✗ return;
798 ✗ plane = 0;
799 }
800 ✗ x = 0;
801 ✗ pixel = 0;
802 ✗ i = (i + 1) & ~1;
803 }
804 }
805 }
806
807 ✗ static void decode_short_horizontal_delta(uint8_t *dst,
808 const uint8_t *buf, const uint8_t *buf_end,
809 int w, int bpp, int dst_size)
810 {
811 ✗ int planepitch = FFALIGN(w, 16) >> 3;
812 ✗ int pitch = planepitch * bpp;
813 GetByteContext ptrs, gb;
814 PutByteContext pb;
815 unsigned ofssrc, pos;
816 int i, k;
817
818 ✗ bytestream2_init(&ptrs, buf, buf_end - buf);
819 ✗ bytestream2_init_writer(&pb, dst, dst_size);
820
821 ✗ for (k = 0; k < bpp; k++) {
822 ✗ ofssrc = bytestream2_get_be32(&ptrs);
823 ✗ pos = 0;
824
825 ✗ if (!ofssrc)
826 ✗ continue;
827
828 ✗ if (ofssrc >= buf_end - buf)
829 ✗ continue;
830
831 ✗ bytestream2_init(&gb, buf + ofssrc, buf_end - (buf + ofssrc));
832 ✗ while (bytestream2_peek_be16(&gb) != 0xFFFF && bytestream2_get_bytes_left(&gb) > 3) {
833 ✗ int16_t offset = bytestream2_get_be16(&gb);
834 unsigned noffset;
835
836 ✗ if (offset >= 0) {
837 ✗ unsigned data = bytestream2_get_be16(&gb);
838
839 ✗ pos += offset * 2;
840 ✗ noffset = (pos / planepitch) * pitch + (pos % planepitch) + k * planepitch;
841 ✗ bytestream2_seek_p(&pb, noffset, SEEK_SET);
842 ✗ bytestream2_put_be16(&pb, data);
843 } else {
844 ✗ uint16_t count = bytestream2_get_be16(&gb);
845
846 ✗ pos += 2 * -(offset + 2);
847 ✗ for (i = 0; i < count; i++) {
848 ✗ uint16_t data = bytestream2_get_be16(&gb);
849
850 ✗ pos += 2;
851 ✗ noffset = (pos / planepitch) * pitch + (pos % planepitch) + k * planepitch;
852 ✗ bytestream2_seek_p(&pb, noffset, SEEK_SET);
853 ✗ bytestream2_put_be16(&pb, data);
854 }
855 }
856 }
857 }
858 }
859
860 ✗ static void decode_byte_vertical_delta(uint8_t *dst,
861 const uint8_t *buf, const uint8_t *buf_end,
862 int w, int xor, int bpp, int dst_size)
863 {
864 ✗ int ncolumns = ((w + 15) / 16) * 2;
865 ✗ int dstpitch = ncolumns * bpp;
866 unsigned ofsdst, ofssrc, opcode, x;
867 GetByteContext ptrs, gb;
868 PutByteContext pb;
869 int i, j, k;
870
871 ✗ bytestream2_init(&ptrs, buf, buf_end - buf);
872 ✗ bytestream2_init_writer(&pb, dst, dst_size);
873
874 ✗ for (k = 0; k < bpp; k++) {
875 ✗ ofssrc = bytestream2_get_be32(&ptrs);
876
877 ✗ if (!ofssrc)
878 ✗ continue;
879
880 ✗ if (ofssrc >= buf_end - buf)
881 ✗ continue;
882
883 ✗ bytestream2_init(&gb, buf + ofssrc, buf_end - (buf + ofssrc));
884 ✗ for (j = 0; j < ncolumns; j++) {
885 ✗ ofsdst = j + k * ncolumns;
886
887 ✗ i = bytestream2_get_byte(&gb);
888 ✗ while (i > 0) {
889 ✗ opcode = bytestream2_get_byte(&gb);
890
891 ✗ if (opcode == 0) {
892 ✗ opcode = bytestream2_get_byte(&gb);
893 ✗ x = bytestream2_get_byte(&gb);
894
895 ✗ while (opcode) {
896 ✗ bytestream2_seek_p(&pb, ofsdst, SEEK_SET);
897 ✗ if (xor && ofsdst < dst_size) {
898 ✗ bytestream2_put_byte(&pb, dst[ofsdst] ^ x);
899 } else {
900 ✗ bytestream2_put_byte(&pb, x);
901 }
902 ✗ ofsdst += dstpitch;
903 ✗ opcode--;
904 }
905 ✗ } else if (opcode < 0x80) {
906 ✗ ofsdst += opcode * dstpitch;
907 } else {
908 ✗ opcode &= 0x7f;
909
910 ✗ while (opcode) {
911 ✗ bytestream2_seek_p(&pb, ofsdst, SEEK_SET);
912 ✗ if (xor && ofsdst < dst_size) {
913 ✗ bytestream2_put_byte(&pb, dst[ofsdst] ^ bytestream2_get_byte(&gb));
914 } else {
915 ✗ bytestream2_put_byte(&pb, bytestream2_get_byte(&gb));
916 }
917 ✗ ofsdst += dstpitch;
918 ✗ opcode--;
919 }
920 }
921 ✗ i--;
922 }
923 }
924 }
925 }
926
927 ✗ static void decode_delta_j(uint8_t *dst,
928 const uint8_t *buf, const uint8_t *buf_end,
929 int w, int h, int bpp, int dst_size)
930 {
931 int32_t pitch;
932 uint8_t *ptr;
933 uint32_t type, flag, cols, groups, rows, bytes;
934 uint32_t offset;
935 ✗ int planepitch_byte = (w + 7) / 8;
936 ✗ int planepitch = ((w + 15) / 16) * 2;
937 int kludge_j, b, g, r, d;
938 GetByteContext gb;
939
940 ✗ pitch = planepitch * bpp;
941 ✗ kludge_j = w < 320 ? (320 - w) / 8 / 2 : 0;
942
943 ✗ bytestream2_init(&gb, buf, buf_end - buf);
944
945 ✗ while (bytestream2_get_bytes_left(&gb) >= 2) {
946 ✗ type = bytestream2_get_be16(&gb);
947
948 ✗ switch (type) {
949 ✗ case 0:
950 ✗ return;
951 ✗ case 1:
952 ✗ flag = bytestream2_get_be16(&gb);
953 ✗ cols = bytestream2_get_be16(&gb);
954 ✗ groups = bytestream2_get_be16(&gb);
955
956 ✗ for (g = 0; g < groups; g++) {
957 ✗ offset = bytestream2_get_be16(&gb);
958
959 ✗ if (cols * bpp == 0 || bytestream2_get_bytes_left(&gb) < cols * bpp) {
960 ✗ av_log(NULL, AV_LOG_ERROR, "cols*bpp is invalid (%"PRId32"*%d)", cols, bpp);
961 ✗ return;
962 }
963
964 ✗ if (kludge_j)
965 ✗ offset = ((offset / (320 / 8)) * pitch) + (offset % (320 / 8)) - kludge_j;
966 else
967 ✗ offset = ((offset / planepitch_byte) * pitch) + (offset % planepitch_byte);
968
969 ✗ for (b = 0; b < cols; b++) {
970 ✗ for (d = 0; d < bpp; d++) {
971 ✗ uint8_t value = bytestream2_get_byte(&gb);
972
973 ✗ if (offset >= dst_size)
974 ✗ return;
975 ✗ ptr = dst + offset;
976
977 ✗ if (flag)
978 ✗ ptr[0] ^= value;
979 else
980 ✗ ptr[0] = value;
981
982 ✗ offset += planepitch;
983 }
984 }
985 ✗ if ((cols * bpp) & 1)
986 ✗ bytestream2_skip(&gb, 1);
987 }
988 ✗ break;
989 ✗ case 2:
990 ✗ flag = bytestream2_get_be16(&gb);
991 ✗ rows = bytestream2_get_be16(&gb);
992 ✗ bytes = bytestream2_get_be16(&gb);
993 ✗ groups = bytestream2_get_be16(&gb);
994
995 ✗ for (g = 0; g < groups; g++) {
996 ✗ offset = bytestream2_get_be16(&gb);
997
998 ✗ if (kludge_j)
999 ✗ offset = ((offset / (320 / 8)) * pitch) + (offset % (320/ 8)) - kludge_j;
1000 else
1001 ✗ offset = ((offset / planepitch_byte) * pitch) + (offset % planepitch_byte);
1002
1003 ✗ for (r = 0; r < rows; r++) {
1004 ✗ for (d = 0; d < bpp; d++) {
1005 ✗ unsigned noffset = offset + (r * pitch) + d * planepitch;
1006
1007 ✗ if (!bytes || bytestream2_get_bytes_left(&gb) < bytes) {
1008 ✗ av_log(NULL, AV_LOG_ERROR, "bytes %"PRId32" is invalid", bytes);
1009 ✗ return;
1010 }
1011
1012 ✗ for (b = 0; b < bytes; b++) {
1013 ✗ uint8_t value = bytestream2_get_byte(&gb);
1014
1015 ✗ if (noffset >= dst_size)
1016 ✗ return;
1017 ✗ ptr = dst + noffset;
1018
1019 ✗ if (flag)
1020 ✗ ptr[0] ^= value;
1021 else
1022 ✗ ptr[0] = value;
1023
1024 ✗ noffset++;
1025 }
1026 }
1027 }
1028 ✗ if ((rows * bytes * bpp) & 1)
1029 ✗ bytestream2_skip(&gb, 1);
1030 }
1031 ✗ break;
1032 ✗ default:
1033 ✗ return;
1034 }
1035 }
1036 }
1037
1038 ✗ static void decode_short_vertical_delta(uint8_t *dst,
1039 const uint8_t *buf, const uint8_t *buf_end,
1040 int w, int bpp, int dst_size)
1041 {
1042 ✗ int ncolumns = (w + 15) >> 4;
1043 ✗ int dstpitch = ncolumns * bpp * 2;
1044 unsigned ofsdst, ofssrc, ofsdata, opcode, x;
1045 GetByteContext ptrs, gb, dptrs, dgb;
1046 PutByteContext pb;
1047 int i, j, k;
1048
1049 ✗ if (buf_end - buf <= 64)
1050 ✗ return;
1051
1052 ✗ bytestream2_init(&ptrs, buf, buf_end - buf);
1053 ✗ bytestream2_init(&dptrs, buf + 32, (buf_end - buf) - 32);
1054 ✗ bytestream2_init_writer(&pb, dst, dst_size);
1055
1056 ✗ for (k = 0; k < bpp; k++) {
1057 ✗ ofssrc = bytestream2_get_be32(&ptrs);
1058 ✗ ofsdata = bytestream2_get_be32(&dptrs);
1059
1060 ✗ if (!ofssrc)
1061 ✗ continue;
1062
1063 ✗ if (ofssrc >= buf_end - buf)
1064 ✗ return;
1065
1066 ✗ if (ofsdata >= buf_end - buf)
1067 ✗ return;
1068
1069 ✗ bytestream2_init(&gb, buf + ofssrc, buf_end - (buf + ofssrc));
1070 ✗ bytestream2_init(&dgb, buf + ofsdata, buf_end - (buf + ofsdata));
1071 ✗ for (j = 0; j < ncolumns; j++) {
1072 ✗ ofsdst = (j + k * ncolumns) * 2;
1073
1074 ✗ i = bytestream2_get_byte(&gb);
1075 ✗ while (i > 0) {
1076 ✗ opcode = bytestream2_get_byte(&gb);
1077
1078 ✗ if (opcode == 0) {
1079 ✗ opcode = bytestream2_get_byte(&gb);
1080 ✗ x = bytestream2_get_be16(&dgb);
1081
1082 ✗ while (opcode) {
1083 ✗ bytestream2_seek_p(&pb, ofsdst, SEEK_SET);
1084 ✗ bytestream2_put_be16(&pb, x);
1085 ✗ ofsdst += dstpitch;
1086 ✗ opcode--;
1087 }
1088 ✗ } else if (opcode < 0x80) {
1089 ✗ ofsdst += opcode * dstpitch;
1090 } else {
1091 ✗ opcode &= 0x7f;
1092
1093 ✗ while (opcode) {
1094 ✗ bytestream2_seek_p(&pb, ofsdst, SEEK_SET);
1095 ✗ bytestream2_put_be16(&pb, bytestream2_get_be16(&dgb));
1096 ✗ ofsdst += dstpitch;
1097 ✗ opcode--;
1098 }
1099 }
1100 ✗ i--;
1101 }
1102 }
1103 }
1104 }
1105
1106 ✗ static void decode_long_vertical_delta(uint8_t *dst,
1107 const uint8_t *buf, const uint8_t *buf_end,
1108 int w, int bpp, int dst_size)
1109 {
1110 ✗ int ncolumns = (w + 31) >> 5;
1111 ✗ int dstpitch = ((w + 15) / 16 * 2) * bpp;
1112 unsigned ofsdst, ofssrc, ofsdata, opcode, x;
1113 GetByteContext ptrs, gb, dptrs, dgb;
1114 PutByteContext pb;
1115 int i, j, k, h;
1116
1117 ✗ if (buf_end - buf <= 64)
1118 ✗ return;
1119
1120 ✗ h = (((w + 15) / 16 * 2) != ((w + 31) / 32 * 4)) ? 1 : 0;
1121 ✗ bytestream2_init(&ptrs, buf, buf_end - buf);
1122 ✗ bytestream2_init(&dptrs, buf + 32, (buf_end - buf) - 32);
1123 ✗ bytestream2_init_writer(&pb, dst, dst_size);
1124
1125 ✗ for (k = 0; k < bpp; k++) {
1126 ✗ ofssrc = bytestream2_get_be32(&ptrs);
1127 ✗ ofsdata = bytestream2_get_be32(&dptrs);
1128
1129 ✗ if (!ofssrc)
1130 ✗ continue;
1131
1132 ✗ if (ofssrc >= buf_end - buf)
1133 ✗ return;
1134
1135 ✗ if (ofsdata >= buf_end - buf)
1136 ✗ return;
1137
1138 ✗ bytestream2_init(&gb, buf + ofssrc, buf_end - (buf + ofssrc));
1139 ✗ bytestream2_init(&dgb, buf + ofsdata, buf_end - (buf + ofsdata));
1140 ✗ for (j = 0; j < ncolumns; j++) {
1141 ✗ ofsdst = (j + k * ncolumns) * 4 - h * (2 * k);
1142
1143 ✗ i = bytestream2_get_byte(&gb);
1144 ✗ while (i > 0) {
1145 ✗ opcode = bytestream2_get_byte(&gb);
1146
1147 ✗ if (opcode == 0) {
1148 ✗ opcode = bytestream2_get_byte(&gb);
1149 ✗ if (h && (j == (ncolumns - 1))) {
1150 ✗ x = bytestream2_get_be16(&dgb);
1151 ✗ bytestream2_skip(&dgb, 2);
1152 } else {
1153 ✗ x = bytestream2_get_be32(&dgb);
1154 }
1155
1156 ✗ if (ofsdst + (opcode - 1LL) * dstpitch > bytestream2_size_p(&pb))
1157 ✗ return;
1158
1159 ✗ while (opcode) {
1160 ✗ bytestream2_seek_p(&pb, ofsdst, SEEK_SET);
1161 ✗ if (h && (j == (ncolumns - 1))) {
1162 ✗ bytestream2_put_be16(&pb, x);
1163 } else {
1164 ✗ bytestream2_put_be32(&pb, x);
1165 }
1166 ✗ ofsdst += dstpitch;
1167 ✗ opcode--;
1168 }
1169 ✗ } else if (opcode < 0x80) {
1170 ✗ ofsdst += opcode * dstpitch;
1171 } else {
1172 ✗ opcode &= 0x7f;
1173
1174 ✗ while (opcode) {
1175 ✗ bytestream2_seek_p(&pb, ofsdst, SEEK_SET);
1176 ✗ if (h && (j == (ncolumns - 1))) {
1177 ✗ bytestream2_put_be16(&pb, bytestream2_get_be16(&dgb));
1178 ✗ bytestream2_skip(&dgb, 2);
1179 } else {
1180 ✗ bytestream2_put_be32(&pb, bytestream2_get_be32(&dgb));
1181 }
1182 ✗ ofsdst += dstpitch;
1183 ✗ opcode--;
1184 }
1185 }
1186 ✗ i--;
1187 }
1188 }
1189 }
1190 }
1191
1192 ✗ static void decode_short_vertical_delta2(uint8_t *dst,
1193 const uint8_t *buf, const uint8_t *buf_end,
1194 int w, int bpp, int dst_size)
1195 {
1196 ✗ int ncolumns = (w + 15) >> 4;
1197 ✗ int dstpitch = ncolumns * bpp * 2;
1198 unsigned ofsdst, ofssrc, opcode, x;
1199 GetByteContext ptrs, gb;
1200 PutByteContext pb;
1201 int i, j, k;
1202
1203 ✗ bytestream2_init(&ptrs, buf, buf_end - buf);
1204 ✗ bytestream2_init_writer(&pb, dst, dst_size);
1205
1206 ✗ for (k = 0; k < bpp; k++) {
1207 ✗ ofssrc = bytestream2_get_be32(&ptrs);
1208
1209 ✗ if (!ofssrc)
1210 ✗ continue;
1211
1212 ✗ if (ofssrc >= buf_end - buf)
1213 ✗ continue;
1214
1215 ✗ bytestream2_init(&gb, buf + ofssrc, buf_end - (buf + ofssrc));
1216 ✗ for (j = 0; j < ncolumns; j++) {
1217 ✗ ofsdst = (j + k * ncolumns) * 2;
1218
1219 ✗ i = bytestream2_get_be16(&gb);
1220 ✗ while (i > 0 && bytestream2_get_bytes_left(&gb) > 4) {
1221 ✗ opcode = bytestream2_get_be16(&gb);
1222
1223 ✗ if (opcode == 0) {
1224 ✗ opcode = bytestream2_get_be16(&gb);
1225 ✗ x = bytestream2_get_be16(&gb);
1226
1227 ✗ while (opcode && bytestream2_get_bytes_left_p(&pb) > 1) {
1228 ✗ bytestream2_seek_p(&pb, ofsdst, SEEK_SET);
1229 ✗ bytestream2_put_be16(&pb, x);
1230 ✗ ofsdst += dstpitch;
1231 ✗ opcode--;
1232 }
1233 ✗ } else if (opcode < 0x8000) {
1234 ✗ ofsdst += opcode * dstpitch;
1235 } else {
1236 ✗ opcode &= 0x7fff;
1237
1238 ✗ while (opcode && bytestream2_get_bytes_left(&gb) > 1 &&
1239 ✗ bytestream2_get_bytes_left_p(&pb) > 1) {
1240 ✗ bytestream2_seek_p(&pb, ofsdst, SEEK_SET);
1241 ✗ bytestream2_put_be16(&pb, bytestream2_get_be16(&gb));
1242 ✗ ofsdst += dstpitch;
1243 ✗ opcode--;
1244 }
1245 }
1246 ✗ i--;
1247 }
1248 }
1249 }
1250 }
1251
1252 ✗ static void decode_long_vertical_delta2(uint8_t *dst,
1253 const uint8_t *buf, const uint8_t *buf_end,
1254 int w, int bpp, int dst_size)
1255 {
1256 ✗ int ncolumns = (w + 31) >> 5;
1257 ✗ int dstpitch = ((w + 15) / 16 * 2) * bpp;
1258 unsigned ofsdst, ofssrc, opcode, x;
1259 ✗ unsigned skip = 0x80000000, mask = skip - 1;
1260 GetByteContext ptrs, gb;
1261 PutByteContext pb;
1262 int i, j, k, h;
1263
1264 ✗ h = (((w + 15) / 16 * 2) != ((w + 31) / 32 * 4)) ? 1 : 0;
1265 ✗ bytestream2_init(&ptrs, buf, buf_end - buf);
1266 ✗ bytestream2_init_writer(&pb, dst, dst_size);
1267
1268 ✗ for (k = 0; k < bpp; k++) {
1269 ✗ ofssrc = bytestream2_get_be32(&ptrs);
1270
1271 ✗ if (!ofssrc)
1272 ✗ continue;
1273
1274 ✗ if (ofssrc >= buf_end - buf)
1275 ✗ continue;
1276
1277 ✗ bytestream2_init(&gb, buf + ofssrc, buf_end - (buf + ofssrc));
1278 ✗ for (j = 0; j < ncolumns; j++) {
1279 ✗ ofsdst = (j + k * ncolumns) * 4 - h * (2 * k);
1280
1281 ✗ if (h && (j == (ncolumns - 1))) {
1282 ✗ skip = 0x8000;
1283 ✗ mask = skip - 1;
1284 }
1285
1286 ✗ i = bytestream2_get_be32(&gb);
1287 ✗ while (i > 0 && bytestream2_get_bytes_left(&gb) > 4) {
1288 ✗ opcode = bytestream2_get_be32(&gb);
1289
1290 ✗ if (opcode == 0) {
1291 ✗ if (h && (j == ncolumns - 1)) {
1292 ✗ opcode = bytestream2_get_be16(&gb);
1293 ✗ x = bytestream2_get_be16(&gb);
1294 } else {
1295 ✗ opcode = bytestream2_get_be32(&gb);
1296 ✗ x = bytestream2_get_be32(&gb);
1297 }
1298
1299 ✗ if (ofsdst + (opcode - 1LL) * dstpitch > bytestream2_size_p(&pb))
1300 ✗ return;
1301
1302 ✗ while (opcode && bytestream2_get_bytes_left_p(&pb) > 1) {
1303 ✗ bytestream2_seek_p(&pb, ofsdst, SEEK_SET);
1304 ✗ if (h && (j == ncolumns - 1))
1305 ✗ bytestream2_put_be16(&pb, x);
1306 else
1307 ✗ bytestream2_put_be32(&pb, x);
1308 ✗ ofsdst += dstpitch;
1309 ✗ opcode--;
1310 }
1311 ✗ } else if (opcode < skip) {
1312 ✗ ofsdst += opcode * dstpitch;
1313 } else {
1314 ✗ opcode &= mask;
1315
1316 ✗ while (opcode && bytestream2_get_bytes_left(&gb) > 1 &&
1317 ✗ bytestream2_get_bytes_left_p(&pb) > 1) {
1318 ✗ bytestream2_seek_p(&pb, ofsdst, SEEK_SET);
1319 ✗ if (h && (j == ncolumns - 1)) {
1320 ✗ bytestream2_put_be16(&pb, bytestream2_get_be16(&gb));
1321 } else {
1322 ✗ bytestream2_put_be32(&pb, bytestream2_get_be32(&gb));
1323 }
1324 ✗ ofsdst += dstpitch;
1325 ✗ opcode--;
1326 }
1327 }
1328 ✗ i--;
1329 }
1330 }
1331 }
1332 }
1333
1334 ✗ static void decode_delta_d(uint8_t *dst,
1335 const uint8_t *buf, const uint8_t *buf_end,
1336 int w, int flag, int bpp, int dst_size)
1337 {
1338 ✗ int planepitch = FFALIGN(w, 16) >> 3;
1339 ✗ int pitch = planepitch * bpp;
1340 ✗ int planepitch_byte = (w + 7) / 8;
1341 unsigned entries, ofssrc;
1342 GetByteContext gb, ptrs;
1343 PutByteContext pb;
1344 int k;
1345
1346 ✗ if (buf_end - buf <= 4 * bpp)
1347 ✗ return;
1348
1349 ✗ bytestream2_init_writer(&pb, dst, dst_size);
1350 ✗ bytestream2_init(&ptrs, buf, bpp * 4);
1351
1352 ✗ for (k = 0; k < bpp; k++) {
1353 ✗ ofssrc = bytestream2_get_be32(&ptrs);
1354
1355 ✗ if (!ofssrc)
1356 ✗ continue;
1357
1358 ✗ if (ofssrc >= buf_end - buf)
1359 ✗ continue;
1360
1361 ✗ bytestream2_init(&gb, buf + ofssrc, buf_end - (buf + ofssrc));
1362
1363 ✗ entries = bytestream2_get_be32(&gb);
1364 ✗ if (entries * 8LL > bytestream2_get_bytes_left(&gb))
1365 ✗ return;
1366
1367 ✗ while (entries && bytestream2_get_bytes_left(&gb) >= 8) {
1368 ✗ int32_t opcode = bytestream2_get_be32(&gb);
1369 ✗ unsigned offset = bytestream2_get_be32(&gb);
1370
1371 ✗ bytestream2_seek_p(&pb, (offset / planepitch_byte) * pitch + (offset % planepitch_byte) + k * planepitch, SEEK_SET);
1372 ✗ if (opcode >= 0) {
1373 ✗ uint32_t x = bytestream2_get_be32(&gb);
1374 ✗ if (opcode && 4 + (opcode - 1LL) * pitch > bytestream2_get_bytes_left_p(&pb))
1375 ✗ continue;
1376 ✗ while (opcode && bytestream2_get_bytes_left_p(&pb) > 0) {
1377 ✗ bytestream2_put_be32(&pb, x);
1378 ✗ bytestream2_skip_p(&pb, pitch - 4);
1379 ✗ opcode--;
1380 }
1381 } else {
1382 ✗ while (opcode && bytestream2_get_bytes_left(&gb) > 0) {
1383 ✗ bytestream2_put_be32(&pb, bytestream2_get_be32(&gb));
1384 ✗ bytestream2_skip_p(&pb, pitch - 4);
1385 ✗ opcode++;
1386 }
1387 }
1388 ✗ entries--;
1389 }
1390 }
1391 }
1392
1393 ✗ static void decode_delta_e(uint8_t *dst,
1394 const uint8_t *buf, const uint8_t *buf_end,
1395 int w, int flag, int bpp, int dst_size)
1396 {
1397 ✗ int planepitch = FFALIGN(w, 16) >> 3;
1398 ✗ int pitch = planepitch * bpp;
1399 ✗ int planepitch_byte = (w + 7) / 8;
1400 unsigned entries, ofssrc;
1401 GetByteContext gb, ptrs;
1402 PutByteContext pb;
1403 int k;
1404
1405 ✗ if (buf_end - buf <= 4 * bpp)
1406 ✗ return;
1407
1408 ✗ bytestream2_init_writer(&pb, dst, dst_size);
1409 ✗ bytestream2_init(&ptrs, buf, bpp * 4);
1410
1411 ✗ for (k = 0; k < bpp; k++) {
1412 ✗ ofssrc = bytestream2_get_be32(&ptrs);
1413
1414 ✗ if (!ofssrc)
1415 ✗ continue;
1416
1417 ✗ if (ofssrc >= buf_end - buf)
1418 ✗ continue;
1419
1420 ✗ bytestream2_init(&gb, buf + ofssrc, buf_end - (buf + ofssrc));
1421
1422 ✗ entries = bytestream2_get_be16(&gb);
1423 ✗ while (entries && bytestream2_get_bytes_left(&gb) >= 6) {
1424 ✗ int16_t opcode = bytestream2_get_be16(&gb);
1425 ✗ unsigned offset = bytestream2_get_be32(&gb);
1426
1427 ✗ bytestream2_seek_p(&pb, (offset / planepitch_byte) * pitch + (offset % planepitch_byte) + k * planepitch, SEEK_SET);
1428 ✗ if (opcode >= 0) {
1429 ✗ uint16_t x = bytestream2_get_be16(&gb);
1430 ✗ while (opcode && bytestream2_get_bytes_left_p(&pb) > 0) {
1431 ✗ bytestream2_put_be16(&pb, x);
1432 ✗ bytestream2_skip_p(&pb, pitch - 2);
1433 ✗ opcode--;
1434 }
1435 } else {
1436 ✗ opcode = -opcode;
1437 ✗ while (opcode && bytestream2_get_bytes_left(&gb) > 0) {
1438 ✗ bytestream2_put_be16(&pb, bytestream2_get_be16(&gb));
1439 ✗ bytestream2_skip_p(&pb, pitch - 2);
1440 ✗ opcode--;
1441 }
1442 }
1443 ✗ entries--;
1444 }
1445 }
1446 }
1447
1448 ✗ static void decode_delta_l(uint8_t *dst,
1449 const uint8_t *buf, const uint8_t *buf_end,
1450 int w, int flag, int bpp, int dst_size)
1451 {
1452 GetByteContext off0, off1, dgb, ogb;
1453 PutByteContext pb;
1454 unsigned poff0, poff1;
1455 int i, k, dstpitch;
1456 ✗ int planepitch_byte = (w + 7) / 8;
1457 ✗ int planepitch = ((w + 15) / 16) * 2;
1458 ✗ int pitch = planepitch * bpp;
1459 ✗ int count = 0;
1460
1461 ✗ if (buf_end - buf <= 64)
1462 ✗ return;
1463
1464 ✗ bytestream2_init(&off0, buf, buf_end - buf);
1465 ✗ bytestream2_init(&off1, buf + 32, buf_end - (buf + 32));
1466 ✗ bytestream2_init_writer(&pb, dst, dst_size);
1467
1468 ✗ dstpitch = flag ? (((w + 7) / 8) * bpp): 2;
1469
1470 ✗ for (k = 0; k < bpp; k++) {
1471 ✗ poff0 = bytestream2_get_be32(&off0);
1472 ✗ poff1 = bytestream2_get_be32(&off1);
1473
1474 ✗ if (!poff0)
1475 ✗ continue;
1476
1477 ✗ if (2LL * poff0 >= buf_end - buf)
1478 ✗ return;
1479
1480 ✗ if (2LL * poff1 >= buf_end - buf)
1481 ✗ return;
1482
1483 ✗ bytestream2_init(&dgb, buf + 2 * poff0, buf_end - (buf + 2 * poff0));
1484 ✗ bytestream2_init(&ogb, buf + 2 * poff1, buf_end - (buf + 2 * poff1));
1485
1486 ✗ while (bytestream2_peek_be16(&ogb) != 0xFFFF && bytestream2_get_bytes_left(&ogb) >= 4) {
1487 ✗ uint32_t offset = bytestream2_get_be16(&ogb);
1488 ✗ int16_t cnt = bytestream2_get_be16(&ogb);
1489 uint16_t data;
1490
1491 ✗ if (count > dst_size)
1492 ✗ break;
1493 ✗ offset = ((2 * offset) / planepitch_byte) * pitch + ((2 * offset) % planepitch_byte) + k * planepitch;
1494 ✗ if (cnt < 0) {
1495 ✗ if (bytestream2_get_bytes_left(&dgb) < 2)
1496 ✗ break;
1497 ✗ bytestream2_seek_p(&pb, offset, SEEK_SET);
1498 ✗ cnt = -cnt;
1499 ✗ data = bytestream2_get_be16(&dgb);
1500 ✗ count += cnt;
1501 ✗ for (i = 0; i < cnt; i++) {
1502 ✗ bytestream2_put_be16(&pb, data);
1503 ✗ bytestream2_skip_p(&pb, dstpitch - 2);
1504 }
1505 } else {
1506 ✗ if (bytestream2_get_bytes_left(&dgb) < 2*cnt)
1507 ✗ break;
1508 ✗ bytestream2_seek_p(&pb, offset, SEEK_SET);
1509 ✗ count += cnt;
1510 ✗ for (i = 0; i < cnt; i++) {
1511 ✗ data = bytestream2_get_be16(&dgb);
1512 ✗ bytestream2_put_be16(&pb, data);
1513 ✗ bytestream2_skip_p(&pb, dstpitch - 2);
1514 }
1515 }
1516 }
1517 }
1518 }
1519
1520 ✗ static int unsupported(AVCodecContext *avctx)
1521 {
1522 ✗ IffContext *s = avctx->priv_data;
1523 ✗ avpriv_request_sample(avctx, "bitmap (compression 0x%0x, bpp %i, ham %i, interlaced %i)", s->compression, s->bpp, s->ham, s->is_interlaced);
1524 ✗ return AVERROR_INVALIDDATA;
1525 }
1526
1527 2 static int decode_frame(AVCodecContext *avctx,
1528 void *data, int *got_frame,
1529 AVPacket *avpkt)
1530 {
1531 2 IffContext *s = avctx->priv_data;
1532 2 AVFrame *frame = data;
1533 2 const uint8_t *buf = avpkt->data;
1534 2 int buf_size = avpkt->size;
1535 2 const uint8_t *buf_end = buf + buf_size;
1536 int y, plane, res;
1537 2 GetByteContext *gb = &s->gb;
1538 const AVPixFmtDescriptor *desc;
1539
1540 2 bytestream2_init(gb, avpkt->data, avpkt->size);
1541
1542
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 2 if ((res = extract_header(avctx, avpkt)) < 0)
1543 ✗ return res;
1544
1545
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 2 if ((res = ff_get_buffer(avctx, frame, 0)) < 0)
1546 ✗ return res;
1547 2 s->frame = frame;
1548
1549 2 buf += bytestream2_tell(gb);
1550 2 buf_size -= bytestream2_tell(gb);
1551 2 desc = av_pix_fmt_desc_get(avctx->pix_fmt);
1552
1553
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 2 if (!s->init && avctx->bits_per_coded_sample <= 8 - (s->masking == MASK_HAS_MASK) &&
1554
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 2 avctx->pix_fmt == AV_PIX_FMT_PAL8) {
1555
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 2 if ((res = cmap_read_palette(avctx, (uint32_t *)frame->data[1])) < 0)
1556 ✗ return res;
1557 ✗ } else if (!s->init && avctx->bits_per_coded_sample <= 8 &&
1558 ✗ avctx->pix_fmt == AV_PIX_FMT_RGB32) {
1559 ✗ if ((res = cmap_read_palette(avctx, s->mask_palbuf)) < 0)
1560 ✗ return res;
1561 }
1562 2 s->init = 1;
1563
1564
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 2 if (s->compression <= 0xff && (avctx->codec_tag == MKTAG('A', 'N', 'I', 'M'))) {
1565 ✗ if (avctx->pix_fmt == AV_PIX_FMT_PAL8)
1566 ✗ memcpy(s->pal, s->frame->data[1], 256 * 4);
1567 }
1568
1569
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 2 switch (s->compression) {
1570 1 case 0x0:
1571
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 1 if (avctx->codec_tag == MKTAG('A', 'C', 'B', 'M')) {
1572 ✗ if (avctx->pix_fmt == AV_PIX_FMT_PAL8 || avctx->pix_fmt == AV_PIX_FMT_GRAY8) {
1573 ✗ memset(frame->data[0], 0, avctx->height * frame->linesize[0]);
1574 ✗ for (plane = 0; plane < s->bpp; plane++) {
1575 ✗ for (y = 0; y < avctx->height && buf < buf_end; y++) {
1576 ✗ uint8_t *row = &frame->data[0][y * frame->linesize[0]];
1577 ✗ decodeplane8(row, buf, FFMIN(s->planesize, buf_end - buf), plane);
1578 ✗ buf += s->planesize;
1579 }
1580 }
1581 ✗ } else if (s->ham) { // HAM to AV_PIX_FMT_BGR32
1582 ✗ memset(frame->data[0], 0, avctx->height * frame->linesize[0]);
1583 ✗ for (y = 0; y < avctx->height; y++) {
1584 ✗ uint8_t *row = &frame->data[0][y * frame->linesize[0]];
1585 ✗ memset(s->ham_buf, 0, s->planesize * 8);
1586 ✗ for (plane = 0; plane < s->bpp; plane++) {
1587 ✗ const uint8_t * start = buf + (plane * avctx->height + y) * s->planesize;
1588 ✗ if (start >= buf_end)
1589 ✗ break;
1590 ✗ decodeplane8(s->ham_buf, start, FFMIN(s->planesize, buf_end - start), plane);
1591 }
1592 ✗ decode_ham_plane32((uint32_t *)row, s->ham_buf, s->ham_palbuf, s->planesize);
1593 }
1594 } else
1595 ✗ return unsupported(avctx);
1596
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 1 } else if (avctx->codec_tag == MKTAG('D', 'E', 'E', 'P')) {
1597 ✗ int raw_width = avctx->width * (av_get_bits_per_pixel(desc) >> 3);
1598 int x;
1599 ✗ for (y = 0; y < avctx->height && buf < buf_end; y++) {
1600 ✗ uint8_t *row = &frame->data[0][y * frame->linesize[0]];
1601 ✗ memcpy(row, buf, FFMIN(raw_width, buf_end - buf));
1602 ✗ buf += raw_width;
1603 ✗ if (avctx->pix_fmt == AV_PIX_FMT_BGR32) {
1604 ✗ for (x = 0; x < avctx->width; x++)
1605 ✗ row[4 * x + 3] = row[4 * x + 3] & 0xF0 | (row[4 * x + 3] >> 4);
1606 }
1607 }
1608
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 1 } else if (avctx->codec_tag == MKTAG('I', 'L', 'B', 'M') || // interleaved
1609 ✗ avctx->codec_tag == MKTAG('A', 'N', 'I', 'M')) {
1610
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 1 if (avctx->codec_tag == MKTAG('A', 'N', 'I', 'M'))
1611 ✗ memcpy(s->video[0], buf, FFMIN(buf_end - buf, s->video_size));
1612
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 1 if (avctx->pix_fmt == AV_PIX_FMT_PAL8 || avctx->pix_fmt == AV_PIX_FMT_GRAY8) {
1613
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 241 for (y = 0; y < avctx->height; y++) {
1614 240 uint8_t *row = &frame->data[0][y * frame->linesize[0]];
1615 240 memset(row, 0, avctx->width);
1616
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 2160 for (plane = 0; plane < s->bpp && buf < buf_end; plane++) {
1617 1920 decodeplane8(row, buf, FFMIN(s->planesize, buf_end - buf), plane);
1618 1920 buf += s->planesize;
1619 }
1620 }
1621 ✗ } else if (s->ham) { // HAM to AV_PIX_FMT_BGR32
1622 ✗ for (y = 0; y < avctx->height; y++) {
1623 ✗ uint8_t *row = &frame->data[0][y * frame->linesize[0]];
1624 ✗ memset(s->ham_buf, 0, s->planesize * 8);
1625 ✗ for (plane = 0; plane < s->bpp && buf < buf_end; plane++) {
1626 ✗ decodeplane8(s->ham_buf, buf, FFMIN(s->planesize, buf_end - buf), plane);
1627 ✗ buf += s->planesize;
1628 }
1629 ✗ decode_ham_plane32((uint32_t *)row, s->ham_buf, s->ham_palbuf, s->planesize);
1630 }
1631 } else { // AV_PIX_FMT_BGR32
1632 ✗ for (y = 0; y < avctx->height; y++) {
1633 ✗ uint8_t *row = &frame->data[0][y * frame->linesize[0]];
1634 ✗ memset(row, 0, avctx->width << 2);
1635 ✗ for (plane = 0; plane < s->bpp && buf < buf_end; plane++) {
1636 ✗ decodeplane32((uint32_t *)row, buf,
1637 ✗ FFMIN(s->planesize, buf_end - buf), plane);
1638 ✗ buf += s->planesize;
1639 }
1640 }
1641 }
1642 ✗ } else if (avctx->codec_tag == MKTAG('P', 'B', 'M', ' ')) { // IFF-PBM
1643 ✗ if (avctx->pix_fmt == AV_PIX_FMT_PAL8 || avctx->pix_fmt == AV_PIX_FMT_GRAY8) {
1644 ✗ for (y = 0; y < avctx->height && buf_end > buf; y++) {
1645 ✗ uint8_t *row = &frame->data[0][y * frame->linesize[0]];
1646 ✗ memcpy(row, buf, FFMIN(avctx->width, buf_end - buf));
1647 ✗ buf += avctx->width + (avctx->width % 2); // padding if odd
1648 }
1649 ✗ } else if (s->ham) { // IFF-PBM: HAM to AV_PIX_FMT_BGR32
1650 ✗ for (y = 0; y < avctx->height && buf_end > buf; y++) {
1651 ✗ uint8_t *row = &frame->data[0][y * frame->linesize[0]];
1652 ✗ memcpy(s->ham_buf, buf, FFMIN(avctx->width, buf_end - buf));
1653 ✗ buf += avctx->width + (avctx->width & 1); // padding if odd
1654 ✗ decode_ham_plane32((uint32_t *)row, s->ham_buf, s->ham_palbuf, s->planesize);
1655 }
1656 } else
1657 ✗ return unsupported(avctx);
1658 } else {
1659 ✗ return unsupported(avctx);
1660 }
1661 1 break;
1662 1 case 0x1:
1663
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 1 if (avctx->codec_tag == MKTAG('I', 'L', 'B', 'M') || // interleaved
1664
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 1 avctx->codec_tag == MKTAG('A', 'N', 'I', 'M')) {
1665 ✗ if (avctx->pix_fmt == AV_PIX_FMT_PAL8 || avctx->pix_fmt == AV_PIX_FMT_GRAY8) {
1666 ✗ uint8_t *video = s->video[0];
1667
1668 ✗ for (y = 0; y < avctx->height; y++) {
1669 ✗ uint8_t *row = &frame->data[0][y * frame->linesize[0]];
1670 ✗ memset(row, 0, avctx->width);
1671 ✗ for (plane = 0; plane < s->bpp; plane++) {
1672 ✗ buf += decode_byterun(s->planebuf, s->planesize, gb);
1673 ✗ if (avctx->codec_tag == MKTAG('A', 'N', 'I', 'M')) {
1674 ✗ memcpy(video, s->planebuf, s->planesize);
1675 ✗ video += s->planesize;
1676 }
1677 ✗ decodeplane8(row, s->planebuf, s->planesize, plane);
1678 }
1679 }
1680 ✗ } else if (avctx->bits_per_coded_sample <= 8) { //8-bit (+ mask) to AV_PIX_FMT_BGR32
1681 ✗ for (y = 0; y < avctx->height; y++) {
1682 ✗ uint8_t *row = &frame->data[0][y * frame->linesize[0]];
1683 ✗ memset(s->mask_buf, 0, avctx->width * sizeof(uint32_t));
1684 ✗ for (plane = 0; plane < s->bpp; plane++) {
1685 ✗ buf += decode_byterun(s->planebuf, s->planesize, gb);
1686 ✗ decodeplane32(s->mask_buf, s->planebuf, s->planesize, plane);
1687 }
1688 ✗ lookup_pal_indicies((uint32_t *)row, s->mask_buf, s->mask_palbuf, avctx->width);
1689 }
1690 ✗ } else if (s->ham) { // HAM to AV_PIX_FMT_BGR32
1691 ✗ uint8_t *video = s->video[0];
1692 ✗ for (y = 0; y < avctx->height; y++) {
1693 ✗ uint8_t *row = &frame->data[0][y * frame->linesize[0]];
1694 ✗ memset(s->ham_buf, 0, s->planesize * 8);
1695 ✗ for (plane = 0; plane < s->bpp; plane++) {
1696 ✗ buf += decode_byterun(s->planebuf, s->planesize, gb);
1697 ✗ if (avctx->codec_tag == MKTAG('A', 'N', 'I', 'M')) {
1698 ✗ memcpy(video, s->planebuf, s->planesize);
1699 ✗ video += s->planesize;
1700 }
1701 ✗ decodeplane8(s->ham_buf, s->planebuf, s->planesize, plane);
1702 }
1703 ✗ decode_ham_plane32((uint32_t *)row, s->ham_buf, s->ham_palbuf, s->planesize);
1704 }
1705 } else { // AV_PIX_FMT_BGR32
1706 ✗ for (y = 0; y < avctx->height; y++) {
1707 ✗ uint8_t *row = &frame->data[0][y * frame->linesize[0]];
1708 ✗ memset(row, 0, avctx->width << 2);
1709 ✗ for (plane = 0; plane < s->bpp; plane++) {
1710 ✗ buf += decode_byterun(s->planebuf, s->planesize, gb);
1711 ✗ decodeplane32((uint32_t *)row, s->planebuf, s->planesize, plane);
1712 }
1713 }
1714 }
1715
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 1 } else if (avctx->codec_tag == MKTAG('P', 'B', 'M', ' ')) { // IFF-PBM
1716
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 1 if (avctx->pix_fmt == AV_PIX_FMT_PAL8 || avctx->pix_fmt == AV_PIX_FMT_GRAY8) {
1717
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 241 for (y = 0; y < avctx->height; y++) {
1718 240 uint8_t *row = &frame->data[0][y * frame->linesize[0]];
1719 240 buf += decode_byterun(row, avctx->width, gb);
1720 }
1721 ✗ } else if (s->ham) { // IFF-PBM: HAM to AV_PIX_FMT_BGR32
1722 ✗ for (y = 0; y < avctx->height; y++) {
1723 ✗ uint8_t *row = &frame->data[0][y * frame->linesize[0]];
1724 ✗ buf += decode_byterun(s->ham_buf, avctx->width, gb);
1725 ✗ decode_ham_plane32((uint32_t *)row, s->ham_buf, s->ham_palbuf, s->planesize);
1726 }
1727 } else
1728 ✗ return unsupported(avctx);
1729 ✗ } else if (avctx->codec_tag == MKTAG('D', 'E', 'E', 'P')) { // IFF-DEEP
1730 ✗ if (av_get_bits_per_pixel(desc) == 32)
1731 ✗ decode_deep_rle32(frame->data[0], buf, buf_size, avctx->width, avctx->height, frame->linesize[0]);
1732 else
1733 ✗ return unsupported(avctx);
1734 ✗ } else if (avctx->codec_tag == MKTAG('A', 'C', 'B', 'M')) {
1735 ✗ if (avctx->pix_fmt == AV_PIX_FMT_PAL8 || avctx->pix_fmt == AV_PIX_FMT_GRAY8) {
1736 ✗ memset(frame->data[0], 0, avctx->height * frame->linesize[0]);
1737 ✗ for (plane = 0; plane < s->bpp; plane++) {
1738 ✗ for (y = 0; y < avctx->height && buf < buf_end; y++) {
1739 ✗ uint8_t *row = &frame->data[0][y * frame->linesize[0]];
1740 ✗ decodeplane8(row, buf, FFMIN(s->planesize, buf_end - buf), plane);
1741 ✗ buf += s->planesize;
1742 }
1743 }
1744 ✗ } else if (s->ham) { // HAM to AV_PIX_FMT_BGR32
1745 ✗ memset(frame->data[0], 0, avctx->height * frame->linesize[0]);
1746 ✗ for (y = 0; y < avctx->height; y++) {
1747 ✗ uint8_t *row = &frame->data[0][y * frame->linesize[0]];
1748 ✗ memset(s->ham_buf, 0, s->planesize * 8);
1749 ✗ for (plane = 0; plane < s->bpp; plane++) {
1750 ✗ const uint8_t * start = buf + (plane * avctx->height + y) * s->planesize;
1751 ✗ if (start >= buf_end)
1752 ✗ break;
1753 ✗ decodeplane8(s->ham_buf, start, FFMIN(s->planesize, buf_end - start), plane);
1754 }
1755 ✗ decode_ham_plane32((uint32_t *)row, s->ham_buf, s->ham_palbuf, s->planesize);
1756 }
1757 } else {
1758 ✗ return unsupported(avctx);
1759 }
1760 } else {
1761 ✗ return unsupported(avctx);
1762 }
1763 1 break;
1764 ✗ case 0x2:
1765 ✗ if (avctx->codec_tag == MKTAG('I', 'L', 'B', 'M') && avctx->pix_fmt == AV_PIX_FMT_PAL8) {
1766 ✗ for (plane = 0; plane < s->bpp; plane++) {
1767 ✗ decode_byterun2(s->planebuf, avctx->height, s->planesize, gb);
1768 ✗ for (y = 0; y < avctx->height; y++) {
1769 ✗ uint8_t *row = &frame->data[0][y * frame->linesize[0]];
1770 ✗ decodeplane8(row, s->planebuf + s->planesize * y, s->planesize, plane);
1771 }
1772 }
1773 } else {
1774 ✗ return unsupported(avctx);
1775 }
1776 ✗ break;
1777 ✗ case 0x4:
1778 ✗ if (avctx->codec_tag == MKTAG('R', 'G', 'B', '8') && avctx->pix_fmt == AV_PIX_FMT_RGB32)
1779 ✗ decode_rgb8(gb, frame->data[0], avctx->width, avctx->height, frame->linesize[0]);
1780 ✗ else if (avctx->codec_tag == MKTAG('R', 'G', 'B', 'N') && avctx->pix_fmt == AV_PIX_FMT_RGB444)
1781 ✗ decode_rgbn(gb, frame->data[0], avctx->width, avctx->height, frame->linesize[0]);
1782 else
1783 ✗ return unsupported(avctx);
1784 ✗ break;
1785 ✗ case 0x5:
1786 ✗ if (avctx->codec_tag == MKTAG('D', 'E', 'E', 'P')) {
1787 ✗ if (av_get_bits_per_pixel(desc) == 32)
1788 ✗ decode_deep_tvdc32(frame->data[0], buf, buf_size, avctx->width, avctx->height, frame->linesize[0], s->tvdc);
1789 else
1790 ✗ return unsupported(avctx);
1791 } else
1792 ✗ return unsupported(avctx);
1793 ✗ break;
1794 ✗ case 0x300:
1795 case 0x301:
1796 ✗ decode_short_horizontal_delta(s->video[0], buf, buf_end, avctx->width, s->bpp, s->video_size);
1797 ✗ break;
1798 ✗ case 0x500:
1799 case 0x501:
1800 ✗ decode_byte_vertical_delta(s->video[0], buf, buf_end, avctx->width, s->is_brush, s->bpp, s->video_size);
1801 ✗ break;
1802 ✗ case 0x700:
1803 case 0x701:
1804 ✗ if (s->is_short)
1805 ✗ decode_short_vertical_delta(s->video[0], buf, buf_end, avctx->width, s->bpp, s->video_size);
1806 else
1807 ✗ decode_long_vertical_delta(s->video[0], buf, buf_end, avctx->width, s->bpp, s->video_size);
1808 ✗ break;
1809 ✗ case 0x800:
1810 case 0x801:
1811 ✗ if (s->is_short)
1812 ✗ decode_short_vertical_delta2(s->video[0], buf, buf_end, avctx->width, s->bpp, s->video_size);
1813 else
1814 ✗ decode_long_vertical_delta2(s->video[0], buf, buf_end, avctx->width, s->bpp, s->video_size);
1815 ✗ break;
1816 ✗ case 0x4a00:
1817 case 0x4a01:
1818 ✗ decode_delta_j(s->video[0], buf, buf_end, avctx->width, avctx->height, s->bpp, s->video_size);
1819 ✗ break;
1820 ✗ case 0x6400:
1821 case 0x6401:
1822 ✗ if (s->is_interlaced)
1823 ✗ return unsupported(avctx);
1824 ✗ decode_delta_d(s->video[0], buf, buf_end, avctx->width, s->is_interlaced, s->bpp, s->video_size);
1825 ✗ break;
1826 ✗ case 0x6500:
1827 case 0x6501:
1828 ✗ if (s->is_interlaced)
1829 ✗ return unsupported(avctx);
1830 ✗ decode_delta_e(s->video[0], buf, buf_end, avctx->width, s->is_interlaced, s->bpp, s->video_size);
1831 ✗ break;
1832 ✗ case 0x6c00:
1833 case 0x6c01:
1834 ✗ decode_delta_l(s->video[0], buf, buf_end, avctx->width, s->is_short, s->bpp, s->video_size);
1835 ✗ break;
1836 ✗ default:
1837 ✗ return unsupported(avctx);
1838 }
1839
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 2 if (s->compression <= 0xff && (avctx->codec_tag == MKTAG('A', 'N', 'I', 'M'))) {
1841 ✗ memcpy(s->video[1], s->video[0], s->video_size);
1842 }
1843
1844
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 2 if (s->compression > 0xff) {
1845 ✗ if (avctx->pix_fmt == AV_PIX_FMT_PAL8 || avctx->pix_fmt == AV_PIX_FMT_GRAY8) {
1846 ✗ buf = s->video[0];
1847 ✗ for (y = 0; y < avctx->height; y++) {
1848 ✗ uint8_t *row = &frame->data[0][y * frame->linesize[0]];
1849 ✗ memset(row, 0, avctx->width);
1850 ✗ for (plane = 0; plane < s->bpp; plane++) {
1851 ✗ decodeplane8(row, buf, s->planesize, plane);
1852 ✗ buf += s->planesize;
1853 }
1854 }
1855 ✗ if (avctx->pix_fmt == AV_PIX_FMT_PAL8)
1856 ✗ memcpy(frame->data[1], s->pal, 256 * 4);
1857 ✗ } else if (s->ham) {
1858 ✗ int i, count = 1 << s->ham;
1859
1860 ✗ buf = s->video[0];
1861 ✗ memset(s->ham_palbuf, 0, (1 << s->ham) * 2 * sizeof(uint32_t));
1862 ✗ for (i = 0; i < count; i++) {
1863 ✗ s->ham_palbuf[i*2+1] = s->pal[i];
1864 }
1865 ✗ for (i = 0; i < count; i++) {
1866 ✗ uint32_t tmp = i << (8 - s->ham);
1867 ✗ tmp |= tmp >> s->ham;
1868 ✗ s->ham_palbuf[(i+count)*2] = 0xFF00FFFF;
1869 ✗ s->ham_palbuf[(i+count*2)*2] = 0xFFFFFF00;
1870 ✗ s->ham_palbuf[(i+count*3)*2] = 0xFFFF00FF;
1871 ✗ s->ham_palbuf[(i+count)*2+1] = 0xFF000000 | tmp << 16;
1872 ✗ s->ham_palbuf[(i+count*2)*2+1] = 0xFF000000 | tmp;
1873 ✗ s->ham_palbuf[(i+count*3)*2+1] = 0xFF000000 | tmp << 8;
1874 }
1875 ✗ if (s->masking == MASK_HAS_MASK) {
1876 ✗ for (i = 0; i < 8 * (1 << s->ham); i++)
1877 ✗ s->ham_palbuf[(1 << s->bpp) + i] = s->ham_palbuf[i] | 0xFF000000;
1878 }
1879 ✗ for (y = 0; y < avctx->height; y++) {
1880 ✗ uint8_t *row = &frame->data[0][y * frame->linesize[0]];
1881 ✗ memset(s->ham_buf, 0, s->planesize * 8);
1882 ✗ for (plane = 0; plane < s->bpp; plane++) {
1883 ✗ decodeplane8(s->ham_buf, buf, s->planesize, plane);
1884 ✗ buf += s->planesize;
1885 }
1886 ✗ decode_ham_plane32((uint32_t *)row, s->ham_buf, s->ham_palbuf, s->planesize);
1887 }
1888 } else {
1889 ✗ return unsupported(avctx);
1890 }
1891
1892 ✗ if (!s->is_brush) {
1893 ✗ FFSWAP(uint8_t *, s->video[0], s->video[1]);
1894 }
1895 }
1896
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 2 if (avpkt->flags & AV_PKT_FLAG_KEY) {
1898 2 frame->key_frame = 1;
1899 2 frame->pict_type = AV_PICTURE_TYPE_I;
1900 } else {
1901 ✗ frame->key_frame = 0;
1902 ✗ frame->pict_type = AV_PICTURE_TYPE_P;
1903 }
1904
1905 2 *got_frame = 1;
1906
1907 2 return buf_size;
1908 }
1909
1910 #if CONFIG_IFF_ILBM_DECODER
1911 const AVCodec ff_iff_ilbm_decoder = {
1912 .name = "iff",
1913 .long_name = NULL_IF_CONFIG_SMALL("IFF ACBM/ANIM/DEEP/ILBM/PBM/RGB8/RGBN"),
1914 .type = AVMEDIA_TYPE_VIDEO,
1915 .id = AV_CODEC_ID_IFF_ILBM,
1916 .priv_data_size = sizeof(IffContext),
1917 .init = decode_init,
1918 .close = decode_end,
1919 .decode = decode_frame,
1920 .capabilities = AV_CODEC_CAP_DR1,
1921 .caps_internal = FF_CODEC_CAP_INIT_THREADSAFE | FF_CODEC_CAP_INIT_CLEANUP,
1922 };
1923 #endif
1924