FFmpeg coverage

Directory: ../../../ffmpeg/
File: src/libavcodec/iff.c
Date: 2023-03-22 23:59:29
Exec Total Coverage
Lines: 136 1084 12.5%
Functions: 8 28 28.6%
Branches: 73 818 8.9%
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 "codec_internal.h"
36 #include "decode.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 int planesize;
48 uint8_t * planebuf;
49 uint8_t * ham_buf; ///< temporary buffer for planar to chunky conversation
50 uint32_t *ham_palbuf; ///< HAM decode table
51 uint32_t *mask_buf; ///< temporary buffer for palette indices
52 uint32_t *mask_palbuf; ///< masking palette table
53 unsigned compression; ///< delta compression method used
54 unsigned is_short; ///< short compression method used
55 unsigned is_interlaced;///< video is interlaced
56 unsigned is_brush; ///< video is in ANBR format
57 unsigned bpp; ///< bits per plane to decode (differs from bits_per_coded_sample if HAM)
58 unsigned ham; ///< 0 if non-HAM or number of hold bits (6 for bpp > 6, 4 otherwise)
59 unsigned flags; ///< 1 for EHB, 0 is no extra half darkening
60 unsigned transparency; ///< TODO: transparency color index in palette
61 unsigned masking; ///< TODO: masking method used
62 int init; // 1 if buffer and palette data already initialized, 0 otherwise
63 int16_t tvdc[16]; ///< TVDC lookup table
64 uint8_t *video[2];
65 unsigned video_size;
66 uint32_t *pal;
67 } IffContext;
68
69 #define LUT8_PART(plane, v) \
70 AV_LE2NE64C(UINT64_C(0x0000000)<<32 | v) << plane, \
71 AV_LE2NE64C(UINT64_C(0x1000000)<<32 | v) << plane, \
72 AV_LE2NE64C(UINT64_C(0x0010000)<<32 | v) << plane, \
73 AV_LE2NE64C(UINT64_C(0x1010000)<<32 | v) << plane, \
74 AV_LE2NE64C(UINT64_C(0x0000100)<<32 | v) << plane, \
75 AV_LE2NE64C(UINT64_C(0x1000100)<<32 | v) << plane, \
76 AV_LE2NE64C(UINT64_C(0x0010100)<<32 | v) << plane, \
77 AV_LE2NE64C(UINT64_C(0x1010100)<<32 | v) << plane, \
78 AV_LE2NE64C(UINT64_C(0x0000001)<<32 | v) << plane, \
79 AV_LE2NE64C(UINT64_C(0x1000001)<<32 | v) << plane, \
80 AV_LE2NE64C(UINT64_C(0x0010001)<<32 | v) << plane, \
81 AV_LE2NE64C(UINT64_C(0x1010001)<<32 | v) << plane, \
82 AV_LE2NE64C(UINT64_C(0x0000101)<<32 | v) << plane, \
83 AV_LE2NE64C(UINT64_C(0x1000101)<<32 | v) << plane, \
84 AV_LE2NE64C(UINT64_C(0x0010101)<<32 | v) << plane, \
85 AV_LE2NE64C(UINT64_C(0x1010101)<<32 | v) << plane
86
87 #define LUT8(plane) { \
88 LUT8_PART(plane, 0x0000000), \
89 LUT8_PART(plane, 0x1000000), \
90 LUT8_PART(plane, 0x0010000), \
91 LUT8_PART(plane, 0x1010000), \
92 LUT8_PART(plane, 0x0000100), \
93 LUT8_PART(plane, 0x1000100), \
94 LUT8_PART(plane, 0x0010100), \
95 LUT8_PART(plane, 0x1010100), \
96 LUT8_PART(plane, 0x0000001), \
97 LUT8_PART(plane, 0x1000001), \
98 LUT8_PART(plane, 0x0010001), \
99 LUT8_PART(plane, 0x1010001), \
100 LUT8_PART(plane, 0x0000101), \
101 LUT8_PART(plane, 0x1000101), \
102 LUT8_PART(plane, 0x0010101), \
103 LUT8_PART(plane, 0x1010101), \
104 }
105
106 // 8 planes * 8-bit mask
107 static const uint64_t plane8_lut[8][256] = {
108 LUT8(0), LUT8(1), LUT8(2), LUT8(3),
109 LUT8(4), LUT8(5), LUT8(6), LUT8(7),
110 };
111
112 #define LUT32(plane) { \
113 0, 0, 0, 0, \
114 0, 0, 0, 1U << plane, \
115 0, 0, 1U << plane, 0, \
116 0, 0, 1U << plane, 1U << plane, \
117 0, 1U << plane, 0, 0, \
118 0, 1U << plane, 0, 1U << plane, \
119 0, 1U << plane, 1U << plane, 0, \
120 0, 1U << plane, 1U << plane, 1U << plane, \
121 1U << plane, 0, 0, 0, \
122 1U << plane, 0, 0, 1U << plane, \
123 1U << plane, 0, 1U << plane, 0, \
124 1U << plane, 0, 1U << plane, 1U << plane, \
125 1U << plane, 1U << plane, 0, 0, \
126 1U << plane, 1U << plane, 0, 1U << plane, \
127 1U << plane, 1U << plane, 1U << plane, 0, \
128 1U << plane, 1U << plane, 1U << plane, 1U << plane, \
129 }
130
131 // 32 planes * 4-bit mask * 4 lookup tables each
132 static const uint32_t plane32_lut[32][16*4] = {
133 LUT32( 0), LUT32( 1), LUT32( 2), LUT32( 3),
134 LUT32( 4), LUT32( 5), LUT32( 6), LUT32( 7),
135 LUT32( 8), LUT32( 9), LUT32(10), LUT32(11),
136 LUT32(12), LUT32(13), LUT32(14), LUT32(15),
137 LUT32(16), LUT32(17), LUT32(18), LUT32(19),
138 LUT32(20), LUT32(21), LUT32(22), LUT32(23),
139 LUT32(24), LUT32(25), LUT32(26), LUT32(27),
140 LUT32(28), LUT32(29), LUT32(30), LUT32(31),
141 };
142
143 // Gray to RGB, required for palette table of grayscale images with bpp < 8
144 ✗ static av_always_inline uint32_t gray2rgb(const uint32_t x) {
145 ✗ return x << 16 | x << 8 | x;
146 }
147
148 /**
149 * Convert CMAP buffer (stored in extradata) to lavc palette format
150 */
151 2 static int cmap_read_palette(AVCodecContext *avctx, uint32_t *pal)
152 {
153 2 IffContext *s = avctx->priv_data;
154 unsigned count, i;
155 2 const uint8_t *const palette = avctx->extradata + AV_RB16(avctx->extradata);
156 /* extract_header() already checked that the RHS is >= 0. */
157 2 unsigned palette_size = avctx->extradata_size - AV_RB16(avctx->extradata);
158
159
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 2 if (avctx->bits_per_coded_sample > 8) {
160 ✗ av_log(avctx, AV_LOG_ERROR, "bits_per_coded_sample > 8 not supported\n");
161 ✗ return AVERROR_INVALIDDATA;
162 }
163
164 2 count = 1 << avctx->bits_per_coded_sample;
165 // If extradata is smaller than actually needed, fill the remaining with black.
166 2 count = FFMIN(palette_size / 3, count);
167
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 2 if (count) {
168
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 514 for (i = 0; i < count; i++)
169 512 pal[i] = 0xFF000000 | AV_RB24(palette + i*3);
170
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 2 if (s->flags && count >= 32) { // EHB
171 ✗ for (i = 0; i < 32; i++)
172 ✗ pal[i + 32] = 0xFF000000 | (AV_RB24(palette + i*3) & 0xFEFEFE) >> 1;
173 ✗ count = FFMAX(count, 64);
174 }
175 } else { // Create gray-scale color palette for bps < 8
176 ✗ count = 1 << avctx->bits_per_coded_sample;
177
178 ✗ for (i = 0; i < count; i++)
179 ✗ pal[i] = 0xFF000000 | gray2rgb((i * 255) >> avctx->bits_per_coded_sample);
180 }
181
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 2 if (s->masking == MASK_HAS_MASK) {
182 ✗ if ((1 << avctx->bits_per_coded_sample) < count) {
183 ✗ avpriv_request_sample(avctx, "overlapping mask");
184 ✗ return AVERROR_PATCHWELCOME;
185 }
186 ✗ memcpy(pal + (1 << avctx->bits_per_coded_sample), pal, count * 4);
187 ✗ for (i = 0; i < count; i++)
188 ✗ pal[i] &= 0xFFFFFF;
189
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 2 } else if (s->masking == MASK_HAS_TRANSPARENT_COLOR &&
190 ✗ s->transparency < 1 << avctx->bits_per_coded_sample)
191 ✗ pal[s->transparency] &= 0xFFFFFF;
192 2 return 0;
193 }
194
195 /**
196 * Extracts the IFF extra context and updates internal
197 * decoder structures.
198 *
199 * @param avctx the AVCodecContext where to extract extra context to
200 * @return >= 0 in case of success, a negative error code otherwise
201 */
202 4 static int extract_header(AVCodecContext *const avctx,
203 const uint8_t *const extradata, int extradata_size)
204 {
205 4 IffContext *s = avctx->priv_data;
206 4 const uint8_t *buf = extradata;
207 4 unsigned buf_size = 0;
208 int palette_size;
209
210
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 4 if (extradata_size < 2) {
211 ✗ av_log(avctx, AV_LOG_ERROR, "not enough extradata\n");
212 ✗ return AVERROR_INVALIDDATA;
213 }
214 4 palette_size = extradata_size - AV_RB16(extradata);
215
216 4 buf_size = bytestream_get_be16(&buf);
217
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 4 if (buf_size <= 1 || palette_size < 0) {
218 ✗ av_log(avctx, AV_LOG_ERROR,
219 "Invalid palette size received: %u -> palette data offset: %d\n",
220 buf_size, palette_size);
221 ✗ return AVERROR_INVALIDDATA;
222 }
223
224
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 4 if (buf_size < 41)
225 ✗ return 0;
226
227 4 s->compression = bytestream_get_byte(&buf);
228 4 s->bpp = bytestream_get_byte(&buf);
229 4 s->ham = bytestream_get_byte(&buf);
230 4 s->flags = bytestream_get_byte(&buf);
231 4 s->transparency = bytestream_get_be16(&buf);
232 4 s->masking = bytestream_get_byte(&buf);
233
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 68 for (int i = 0; i < 16; i++)
234 64 s->tvdc[i] = bytestream_get_be16(&buf);
235
236
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 4 if (s->ham) {
237 ✗ if (s->bpp > 8) {
238 ✗ av_log(avctx, AV_LOG_ERROR, "Invalid number of hold bits for HAM: %u\n", s->ham);
239 ✗ return AVERROR_INVALIDDATA;
240 ✗ } else if (s->ham != (s->bpp > 6 ? 6 : 4)) {
241 ✗ av_log(avctx, AV_LOG_ERROR, "Invalid number of hold bits for HAM: %u, BPP: %u\n", s->ham, s->bpp);
242 ✗ return AVERROR_INVALIDDATA;
243 }
244 }
245
246
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 4 if (s->masking == MASK_HAS_MASK) {
247 ✗ if (s->bpp >= 8 && !s->ham) {
248 ✗ avctx->pix_fmt = AV_PIX_FMT_RGB32;
249 ✗ if (s->bpp > 16) {
250 ✗ av_log(avctx, AV_LOG_ERROR, "bpp %d too large for palette\n", s->bpp);
251 ✗ return AVERROR(ENOMEM);
252 }
253 ✗ s->mask_buf = av_malloc((s->planesize * 32) + AV_INPUT_BUFFER_PADDING_SIZE);
254 ✗ if (!s->mask_buf)
255 ✗ return AVERROR(ENOMEM);
256 ✗ s->mask_palbuf = av_malloc((2 << s->bpp) * sizeof(uint32_t) + AV_INPUT_BUFFER_PADDING_SIZE);
257 ✗ if (!s->mask_palbuf)
258 ✗ return AVERROR(ENOMEM);
259 }
260 ✗ s->bpp++;
261
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 4 } else if (s->masking != MASK_NONE && s->masking != MASK_HAS_TRANSPARENT_COLOR) {
262 ✗ av_log(avctx, AV_LOG_ERROR, "Masking not supported\n");
263 ✗ return AVERROR_PATCHWELCOME;
264 }
265
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 4 if (!s->bpp || s->bpp > 32) {
266 ✗ av_log(avctx, AV_LOG_ERROR, "Invalid number of bitplanes: %u\n", s->bpp);
267 ✗ return AVERROR_INVALIDDATA;
268 }
269
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 4 if (s->video_size && s->planesize * s->bpp * avctx->height > s->video_size)
270 ✗ return AVERROR_INVALIDDATA;
271
272
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 4 if (s->ham) {
273 ✗ int count = FFMIN(palette_size / 3, 1 << s->ham);
274 int ham_count;
275 ✗ const uint8_t *const palette = extradata + AV_RB16(extradata);
276 ✗ int extra_space = 1;
277
278 ✗ if (avctx->codec_tag == MKTAG('P', 'B', 'M', ' ') && s->ham == 4)
279 ✗ extra_space = 4;
280
281 ✗ s->ham_buf = av_malloc((s->planesize * 8) + AV_INPUT_BUFFER_PADDING_SIZE);
282 ✗ if (!s->ham_buf)
283 ✗ return AVERROR(ENOMEM);
284
285 ✗ ham_count = 8 * (1 << s->ham);
286 ✗ s->ham_palbuf = av_malloc(extra_space * (ham_count << !!(s->masking == MASK_HAS_MASK)) * sizeof (uint32_t) + AV_INPUT_BUFFER_PADDING_SIZE);
287 ✗ if (!s->ham_palbuf)
288 ✗ return AVERROR(ENOMEM);
289
290 ✗ if (count) { // HAM with color palette attached
291 // prefill with black and palette and set HAM take direct value mask to zero
292 ✗ memset(s->ham_palbuf, 0, (1 << s->ham) * 2 * sizeof (uint32_t));
293 ✗ for (int i = 0; i < count; i++) {
294 ✗ s->ham_palbuf[i*2+1] = 0xFF000000 | AV_RL24(palette + i*3);
295 }
296 ✗ count = 1 << s->ham;
297 } else { // HAM with grayscale color palette
298 ✗ count = 1 << s->ham;
299 ✗ for (int i = 0; i < count; i++) {
300 ✗ s->ham_palbuf[i*2] = 0xFF000000; // take direct color value from palette
301 ✗ s->ham_palbuf[i*2+1] = 0xFF000000 | av_le2ne32(gray2rgb((i * 255) >> s->ham));
302 }
303 }
304 ✗ for (int i = 0; i < count; i++) {
305 ✗ uint32_t tmp = i << (8 - s->ham);
306 ✗ tmp |= tmp >> s->ham;
307 ✗ s->ham_palbuf[(i+count)*2] = 0xFF00FFFF; // just modify blue color component
308 ✗ s->ham_palbuf[(i+count*2)*2] = 0xFFFFFF00; // just modify red color component
309 ✗ s->ham_palbuf[(i+count*3)*2] = 0xFFFF00FF; // just modify green color component
310 ✗ s->ham_palbuf[(i+count)*2+1] = 0xFF000000 | tmp << 16;
311 ✗ s->ham_palbuf[(i+count*2)*2+1] = 0xFF000000 | tmp;
312 ✗ s->ham_palbuf[(i+count*3)*2+1] = 0xFF000000 | tmp << 8;
313 }
314 ✗ if (s->masking == MASK_HAS_MASK) {
315 ✗ for (int i = 0; i < ham_count; i++)
316 ✗ s->ham_palbuf[(1 << s->bpp) + i] = s->ham_palbuf[i] | 0xFF000000;
317 }
318 }
319
320 4 return 0;
321 }
322
323 4 static av_cold int decode_end(AVCodecContext *avctx)
324 {
325 4 IffContext *s = avctx->priv_data;
326 4 av_freep(&s->planebuf);
327 4 av_freep(&s->ham_buf);
328 4 av_freep(&s->ham_palbuf);
329 4 av_freep(&s->mask_buf);
330 4 av_freep(&s->mask_palbuf);
331 4 av_freep(&s->video[0]);
332 4 av_freep(&s->video[1]);
333 4 av_freep(&s->pal);
334 4 return 0;
335 }
336
337 4 static av_cold int decode_init(AVCodecContext *avctx)
338 {
339 4 IffContext *s = avctx->priv_data;
340 int err;
341
342
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 4 if (avctx->bits_per_coded_sample <= 8) {
343 int palette_size;
344
345
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 4 if (avctx->extradata_size >= 2)
346 4 palette_size = avctx->extradata_size - AV_RB16(avctx->extradata);
347 else
348 ✗ palette_size = 0;
349 4 avctx->pix_fmt = (avctx->bits_per_coded_sample < 8) ||
350
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 4 (avctx->extradata_size >= 2 && palette_size) ? AV_PIX_FMT_PAL8 : AV_PIX_FMT_GRAY8;
351 ✗ } else if (avctx->bits_per_coded_sample <= 32) {
352 ✗ if (avctx->codec_tag == MKTAG('R', 'G', 'B', '8')) {
353 ✗ avctx->pix_fmt = AV_PIX_FMT_RGB32;
354 ✗ } else if (avctx->codec_tag == MKTAG('R', 'G', 'B', 'N')) {
355 ✗ avctx->pix_fmt = AV_PIX_FMT_RGB444;
356 ✗ } else if (avctx->codec_tag != MKTAG('D', 'E', 'E', 'P')) {
357 ✗ if (avctx->bits_per_coded_sample == 24) {
358 ✗ avctx->pix_fmt = AV_PIX_FMT_0BGR32;
359 ✗ } else if (avctx->bits_per_coded_sample == 32) {
360 ✗ avctx->pix_fmt = AV_PIX_FMT_BGR32;
361 } else {
362 ✗ avpriv_request_sample(avctx, "unknown bits_per_coded_sample");
363 ✗ return AVERROR_PATCHWELCOME;
364 }
365 }
366 } else {
367 ✗ return AVERROR_INVALIDDATA;
368 }
369
370
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 4 if ((err = av_image_check_size(avctx->width, avctx->height, 0, avctx)))
371 ✗ return err;
372 4 s->planesize = FFALIGN(avctx->width, 16) >> 3; // Align plane size in bits to word-boundary
373 4 s->planebuf = av_malloc(s->planesize * avctx->height + AV_INPUT_BUFFER_PADDING_SIZE);
374
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 4 if (!s->planebuf)
375 ✗ return AVERROR(ENOMEM);
376
377 4 s->bpp = avctx->bits_per_coded_sample;
378
379
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 4 if (avctx->codec_tag == MKTAG('A', 'N', 'I', 'M')) {
380 ✗ s->video_size = FFALIGN(avctx->width, 2) * avctx->height * s->bpp;
381 ✗ if (!s->video_size)
382 ✗ return AVERROR_INVALIDDATA;
383 ✗ s->video[0] = av_calloc(FFALIGN(avctx->width, 2) * avctx->height, s->bpp);
384 ✗ s->video[1] = av_calloc(FFALIGN(avctx->width, 2) * avctx->height, s->bpp);
385 ✗ s->pal = av_calloc(256, sizeof(*s->pal));
386 ✗ if (!s->video[0] || !s->video[1] || !s->pal)
387 ✗ return AVERROR(ENOMEM);
388 }
389
390 4 err = extract_header(avctx, avctx->extradata, avctx->extradata_size);
391
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 4 if (err < 0)
392 ✗ return err;
393
394 4 return 0;
395 }
396
397 /**
398 * Decode interleaved plane buffer up to 8bpp
399 * @param dst Destination buffer
400 * @param buf Source buffer
401 * @param buf_size
402 * @param plane plane number to decode as
403 */
404 1920 static void decodeplane8(uint8_t *dst, const uint8_t *buf, int buf_size, int plane)
405 {
406 const uint64_t *lut;
407
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 1920 if (plane >= 8) {
408 ✗ av_log(NULL, AV_LOG_WARNING, "Ignoring extra planes beyond 8\n");
409 ✗ return;
410 }
411 1920 lut = plane8_lut[plane];
412 do {
413 76800 uint64_t v = AV_RN64A(dst) | lut[*buf++];
414 76800 AV_WN64A(dst, v);
415 76800 dst += 8;
416
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 76800 } while (--buf_size);
417 }
418
419 /**
420 * Decode interleaved plane buffer up to 24bpp
421 * @param dst Destination buffer
422 * @param buf Source buffer
423 * @param buf_size
424 * @param plane plane number to decode as
425 */
426 ✗ static void decodeplane32(uint32_t *dst, const uint8_t *buf, int buf_size, int plane)
427 {
428 ✗ const uint32_t *lut = plane32_lut[plane];
429 do {
430 ✗ unsigned mask = (*buf >> 2) & ~3;
431 ✗ dst[0] |= lut[mask++];
432 ✗ dst[1] |= lut[mask++];
433 ✗ dst[2] |= lut[mask++];
434 ✗ dst[3] |= lut[mask];
435 ✗ mask = (*buf++ << 2) & 0x3F;
436 ✗ dst[4] |= lut[mask++];
437 ✗ dst[5] |= lut[mask++];
438 ✗ dst[6] |= lut[mask++];
439 ✗ dst[7] |= lut[mask];
440 ✗ dst += 8;
441 ✗ } while (--buf_size);
442 }
443
444 #define DECODE_HAM_PLANE32(x) \
445 first = buf[x] << 1; \
446 second = buf[(x)+1] << 1; \
447 delta &= pal[first++]; \
448 delta |= pal[first]; \
449 dst[x] = delta; \
450 delta &= pal[second++]; \
451 delta |= pal[second]; \
452 dst[(x)+1] = delta
453
454 /**
455 * Converts one line of HAM6/8-encoded chunky buffer to 24bpp.
456 *
457 * @param dst the destination 24bpp buffer
458 * @param buf the source 8bpp chunky buffer
459 * @param pal the HAM decode table
460 * @param buf_size the plane size in bytes
461 */
462 ✗ static void decode_ham_plane32(uint32_t *dst, const uint8_t *buf,
463 const uint32_t *const pal, unsigned buf_size)
464 {
465 ✗ uint32_t delta = pal[1]; /* first palette entry */
466 do {
467 uint32_t first, second;
468 ✗ DECODE_HAM_PLANE32(0);
469 ✗ DECODE_HAM_PLANE32(2);
470 ✗ DECODE_HAM_PLANE32(4);
471 ✗ DECODE_HAM_PLANE32(6);
472 ✗ buf += 8;
473 ✗ dst += 8;
474 ✗ } while (--buf_size);
475 }
476
477 ✗ static void lookup_pal_indicies(uint32_t *dst, const uint32_t *buf,
478 const uint32_t *const pal, unsigned width)
479 {
480 do {
481 ✗ *dst++ = pal[*buf++];
482 ✗ } while (--width);
483 }
484
485 /**
486 * Decode one complete byterun1 encoded line.
487 *
488 * @param dst the destination buffer where to store decompressed bitstream
489 * @param dst_size the destination plane size in bytes
490 * @param buf the source byterun1 compressed bitstream
491 * @param buf_end the EOF of source byterun1 compressed bitstream
492 * @return number of consumed bytes in byterun1 compressed bitstream
493 */
494 240 static int decode_byterun(uint8_t *dst, int dst_size,
495 GetByteContext *gb)
496 {
497 unsigned x;
498
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 10365 for (x = 0; x < dst_size && bytestream2_get_bytes_left(gb) > 0;) {
499 unsigned length;
500 10125 const int8_t value = bytestream2_get_byte(gb);
501
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 10125 if (value >= 0) {
502
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 4486 length = FFMIN3(value + 1, dst_size - x, bytestream2_get_bytes_left(gb));
503 4486 bytestream2_get_buffer(gb, dst + x, length);
504
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 4486 if (length < value + 1)
505 ✗ bytestream2_skip(gb, value + 1 - length);
506
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 5639 } else if (value > -128) {
507 5639 length = FFMIN(-value + 1, dst_size - x);
508 5639 memset(dst + x, bytestream2_get_byte(gb), length);
509 } else { // noop
510 ✗ continue;
511 }
512 10125 x += length;
513 }
514
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 240 if (x < dst_size) {
515 ✗ av_log(NULL, AV_LOG_WARNING, "decode_byterun ended before plane size\n");
516 ✗ memset(dst+x, 0, dst_size - x);
517 }
518 240 return bytestream2_tell(gb);
519 }
520
521 ✗ static int decode_byterun2(uint8_t *dst, int height, int line_size,
522 GetByteContext *gb)
523 {
524 GetByteContext cmds;
525 unsigned count;
526 ✗ int i, y_pos = 0, x_pos = 0;
527
528 ✗ if (bytestream2_get_be32(gb) != MKBETAG('V', 'D', 'A', 'T'))
529 ✗ return 0;
530
531 ✗ bytestream2_skip(gb, 4);
532 ✗ count = bytestream2_get_be16(gb) - 2;
533 ✗ if (bytestream2_get_bytes_left(gb) < count)
534 ✗ return 0;
535
536 ✗ bytestream2_init(&cmds, gb->buffer, count);
537 ✗ bytestream2_skip(gb, count);
538
539 ✗ for (i = 0; i < count && x_pos < line_size; i++) {
540 ✗ int8_t cmd = bytestream2_get_byte(&cmds);
541 int l, r;
542
543 ✗ if (cmd == 0) {
544 ✗ l = bytestream2_get_be16(gb);
545 ✗ while (l-- > 0 && x_pos < line_size) {
546 ✗ dst[x_pos + y_pos * line_size ] = bytestream2_get_byte(gb);
547 ✗ dst[x_pos + y_pos++ * line_size + 1] = bytestream2_get_byte(gb);
548 ✗ if (y_pos >= height) {
549 ✗ y_pos = 0;
550 ✗ x_pos += 2;
551 }
552 }
553 ✗ } else if (cmd < 0) {
554 ✗ l = -cmd;
555 ✗ while (l-- > 0 && x_pos < line_size) {
556 ✗ dst[x_pos + y_pos * line_size ] = bytestream2_get_byte(gb);
557 ✗ dst[x_pos + y_pos++ * line_size + 1] = bytestream2_get_byte(gb);
558 ✗ if (y_pos >= height) {
559 ✗ y_pos = 0;
560 ✗ x_pos += 2;
561 }
562 }
563 ✗ } else if (cmd == 1) {
564 ✗ l = bytestream2_get_be16(gb);
565 ✗ r = bytestream2_get_be16(gb);
566 ✗ while (l-- > 0 && x_pos < line_size) {
567 ✗ dst[x_pos + y_pos * line_size ] = r >> 8;
568 ✗ dst[x_pos + y_pos++ * line_size + 1] = r & 0xFF;
569 ✗ if (y_pos >= height) {
570 ✗ y_pos = 0;
571 ✗ x_pos += 2;
572 }
573 }
574 } else {
575 ✗ l = cmd;
576 ✗ r = bytestream2_get_be16(gb);
577 ✗ while (l-- > 0 && x_pos < line_size) {
578 ✗ dst[x_pos + y_pos * line_size ] = r >> 8;
579 ✗ dst[x_pos + y_pos++ * line_size + 1] = r & 0xFF;
580 ✗ if (y_pos >= height) {
581 ✗ y_pos = 0;
582 ✗ x_pos += 2;
583 }
584 }
585 }
586 }
587
588 ✗ return bytestream2_tell(gb);
589 }
590
591 #define DECODE_RGBX_COMMON(type) \
592 if (!length) { \
593 length = bytestream2_get_byte(gb); \
594 if (!length) { \
595 length = bytestream2_get_be16(gb); \
596 if (!length) \
597 return; \
598 } \
599 } \
600 for (i = 0; i < length; i++) { \
601 *(type *)(dst + y*linesize + x * sizeof(type)) = pixel; \
602 x += 1; \
603 if (x >= width) { \
604 y += 1; \
605 if (y >= height) \
606 return; \
607 x = 0; \
608 } \
609 }
610
611 /**
612 * Decode RGB8 buffer
613 * @param[out] dst Destination buffer
614 * @param width Width of destination buffer (pixels)
615 * @param height Height of destination buffer (pixels)
616 * @param linesize Line size of destination buffer (bytes)
617 */
618 ✗ static void decode_rgb8(GetByteContext *gb, uint8_t *dst, int width, int height, int linesize)
619 {
620 ✗ int x = 0, y = 0, i, length;
621 ✗ while (bytestream2_get_bytes_left(gb) >= 4) {
622 ✗ uint32_t pixel = 0xFF000000 | bytestream2_get_be24(gb);
623 ✗ length = bytestream2_get_byte(gb) & 0x7F;
624 ✗ DECODE_RGBX_COMMON(uint32_t)
625 }
626 }
627
628 /**
629 * Decode RGBN buffer
630 * @param[out] dst Destination buffer
631 * @param width Width of destination buffer (pixels)
632 * @param height Height of destination buffer (pixels)
633 * @param linesize Line size of destination buffer (bytes)
634 */
635 ✗ static void decode_rgbn(GetByteContext *gb, uint8_t *dst, int width, int height, int linesize)
636 {
637 ✗ int x = 0, y = 0, i, length;
638 ✗ while (bytestream2_get_bytes_left(gb) >= 2) {
639 ✗ uint32_t pixel = bytestream2_get_be16u(gb);
640 ✗ length = pixel & 0x7;
641 ✗ pixel >>= 4;
642 ✗ DECODE_RGBX_COMMON(uint16_t)
643 }
644 }
645
646 /**
647 * Decode DEEP RLE 32-bit buffer
648 * @param[out] dst Destination buffer
649 * @param[in] src Source buffer
650 * @param src_size Source buffer size (bytes)
651 * @param width Width of destination buffer (pixels)
652 * @param height Height of destination buffer (pixels)
653 * @param linesize Line size of destination buffer (bytes)
654 */
655 ✗ static void decode_deep_rle32(uint8_t *dst, const uint8_t *src, int src_size, int width, int height, int linesize)
656 {
657 ✗ const uint8_t *src_end = src + src_size;
658 ✗ int x = 0, y = 0, i;
659 ✗ while (src_end - src >= 5) {
660 int opcode;
661 ✗ opcode = *(int8_t *)src++;
662 ✗ if (opcode >= 0) {
663 ✗ int size = opcode + 1;
664 ✗ for (i = 0; i < size; i++) {
665 ✗ int length = FFMIN(size - i, width - x);
666 ✗ if (src_end - src < length * 4)
667 ✗ return;
668 ✗ memcpy(dst + y*linesize + x * 4, src, length * 4);
669 ✗ src += length * 4;
670 ✗ x += length;
671 ✗ i += length;
672 ✗ if (x >= width) {
673 ✗ x = 0;
674 ✗ y += 1;
675 ✗ if (y >= height)
676 ✗ return;
677 }
678 }
679 } else {
680 ✗ int size = -opcode + 1;
681 ✗ uint32_t pixel = AV_RN32(src);
682 ✗ for (i = 0; i < size; i++) {
683 ✗ *(uint32_t *)(dst + y*linesize + x * 4) = pixel;
684 ✗ x += 1;
685 ✗ if (x >= width) {
686 ✗ x = 0;
687 ✗ y += 1;
688 ✗ if (y >= height)
689 ✗ return;
690 }
691 }
692 ✗ src += 4;
693 }
694 }
695 }
696
697 /**
698 * Decode DEEP TVDC 32-bit buffer
699 * @param[out] dst Destination buffer
700 * @param[in] src Source buffer
701 * @param src_size Source buffer size (bytes)
702 * @param width Width of destination buffer (pixels)
703 * @param height Height of destination buffer (pixels)
704 * @param linesize Line size of destination buffer (bytes)
705 * @param[int] tvdc TVDC lookup table
706 */
707 ✗ 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)
708 {
709 ✗ int x = 0, y = 0, plane = 0;
710 ✗ int8_t pixel = 0;
711 int i, j;
712
713 ✗ for (i = 0; i < src_size * 2;) {
714 #define GETNIBBLE ((i & 1) ? (src[i>>1] & 0xF) : (src[i>>1] >> 4))
715 ✗ int d = tvdc[GETNIBBLE];
716 ✗ i++;
717 ✗ if (d) {
718 ✗ pixel += d;
719 ✗ dst[y * linesize + x*4 + plane] = pixel;
720 ✗ x++;
721 } else {
722 ✗ if (i >= src_size * 2)
723 ✗ return;
724 ✗ d = GETNIBBLE + 1;
725 ✗ i++;
726 ✗ d = FFMIN(d, width - x);
727 ✗ for (j = 0; j < d; j++) {
728 ✗ dst[y * linesize + x*4 + plane] = pixel;
729 ✗ x++;
730 }
731 }
732 ✗ if (x >= width) {
733 ✗ plane++;
734 ✗ if (plane >= 4) {
735 ✗ y++;
736 ✗ if (y >= height)
737 ✗ return;
738 ✗ plane = 0;
739 }
740 ✗ x = 0;
741 ✗ pixel = 0;
742 ✗ i = (i + 1) & ~1;
743 }
744 }
745 }
746
747 ✗ static void decode_short_horizontal_delta(uint8_t *dst,
748 const uint8_t *buf, const uint8_t *buf_end,
749 int w, int bpp, int dst_size)
750 {
751 ✗ int planepitch = FFALIGN(w, 16) >> 3;
752 ✗ int pitch = planepitch * bpp;
753 GetByteContext ptrs, gb;
754 PutByteContext pb;
755 unsigned ofssrc, pos;
756 int i, k;
757
758 ✗ bytestream2_init(&ptrs, buf, buf_end - buf);
759 ✗ bytestream2_init_writer(&pb, dst, dst_size);
760
761 ✗ for (k = 0; k < bpp; k++) {
762 ✗ ofssrc = bytestream2_get_be32(&ptrs);
763 ✗ pos = 0;
764
765 ✗ if (!ofssrc)
766 ✗ continue;
767
768 ✗ if (ofssrc >= buf_end - buf)
769 ✗ continue;
770
771 ✗ bytestream2_init(&gb, buf + ofssrc, buf_end - (buf + ofssrc));
772 ✗ while (bytestream2_peek_be16(&gb) != 0xFFFF && bytestream2_get_bytes_left(&gb) > 3) {
773 ✗ int16_t offset = bytestream2_get_be16(&gb);
774 unsigned noffset;
775
776 ✗ if (offset >= 0) {
777 ✗ unsigned data = bytestream2_get_be16(&gb);
778
779 ✗ pos += offset * 2;
780 ✗ noffset = (pos / planepitch) * pitch + (pos % planepitch) + k * planepitch;
781 ✗ bytestream2_seek_p(&pb, noffset, SEEK_SET);
782 ✗ bytestream2_put_be16(&pb, data);
783 } else {
784 ✗ uint16_t count = bytestream2_get_be16(&gb);
785
786 ✗ pos += 2 * -(offset + 2);
787 ✗ for (i = 0; i < count; i++) {
788 ✗ uint16_t data = bytestream2_get_be16(&gb);
789
790 ✗ pos += 2;
791 ✗ noffset = (pos / planepitch) * pitch + (pos % planepitch) + k * planepitch;
792 ✗ bytestream2_seek_p(&pb, noffset, SEEK_SET);
793 ✗ bytestream2_put_be16(&pb, data);
794 }
795 }
796 }
797 }
798 }
799
800 ✗ static void decode_byte_vertical_delta(uint8_t *dst,
801 const uint8_t *buf, const uint8_t *buf_end,
802 int w, int xor, int bpp, int dst_size)
803 {
804 ✗ int ncolumns = ((w + 15) / 16) * 2;
805 ✗ int dstpitch = ncolumns * bpp;
806 unsigned ofsdst, ofssrc, opcode, x;
807 GetByteContext ptrs, gb;
808 PutByteContext pb;
809 int i, j, k;
810
811 ✗ bytestream2_init(&ptrs, buf, buf_end - buf);
812 ✗ bytestream2_init_writer(&pb, dst, dst_size);
813
814 ✗ for (k = 0; k < bpp; k++) {
815 ✗ ofssrc = bytestream2_get_be32(&ptrs);
816
817 ✗ if (!ofssrc)
818 ✗ continue;
819
820 ✗ if (ofssrc >= buf_end - buf)
821 ✗ continue;
822
823 ✗ bytestream2_init(&gb, buf + ofssrc, buf_end - (buf + ofssrc));
824 ✗ for (j = 0; j < ncolumns; j++) {
825 ✗ ofsdst = j + k * ncolumns;
826
827 ✗ i = bytestream2_get_byte(&gb);
828 ✗ while (i > 0) {
829 ✗ opcode = bytestream2_get_byte(&gb);
830
831 ✗ if (opcode == 0) {
832 ✗ opcode = bytestream2_get_byte(&gb);
833 ✗ x = bytestream2_get_byte(&gb);
834
835 ✗ while (opcode) {
836 ✗ bytestream2_seek_p(&pb, ofsdst, SEEK_SET);
837 ✗ if (xor && ofsdst < dst_size) {
838 ✗ bytestream2_put_byte(&pb, dst[ofsdst] ^ x);
839 } else {
840 ✗ bytestream2_put_byte(&pb, x);
841 }
842 ✗ ofsdst += dstpitch;
843 ✗ opcode--;
844 }
845 ✗ } else if (opcode < 0x80) {
846 ✗ ofsdst += opcode * dstpitch;
847 } else {
848 ✗ opcode &= 0x7f;
849
850 ✗ while (opcode) {
851 ✗ bytestream2_seek_p(&pb, ofsdst, SEEK_SET);
852 ✗ if (xor && ofsdst < dst_size) {
853 ✗ bytestream2_put_byte(&pb, dst[ofsdst] ^ bytestream2_get_byte(&gb));
854 } else {
855 ✗ bytestream2_put_byte(&pb, bytestream2_get_byte(&gb));
856 }
857 ✗ ofsdst += dstpitch;
858 ✗ opcode--;
859 }
860 }
861 ✗ i--;
862 }
863 }
864 }
865 }
866
867 ✗ static void decode_delta_j(uint8_t *dst,
868 const uint8_t *buf, const uint8_t *buf_end,
869 int w, int h, int bpp, int dst_size)
870 {
871 int32_t pitch;
872 uint8_t *ptr;
873 uint32_t type, flag, cols, groups, rows, bytes;
874 uint32_t offset;
875 ✗ int planepitch_byte = (w + 7) / 8;
876 ✗ int planepitch = ((w + 15) / 16) * 2;
877 int kludge_j, b, g, r, d;
878 GetByteContext gb;
879
880 ✗ pitch = planepitch * bpp;
881 ✗ kludge_j = w < 320 ? (320 - w) / 8 / 2 : 0;
882
883 ✗ bytestream2_init(&gb, buf, buf_end - buf);
884
885 ✗ while (bytestream2_get_bytes_left(&gb) >= 2) {
886 ✗ type = bytestream2_get_be16(&gb);
887
888 ✗ switch (type) {
889 ✗ case 0:
890 ✗ return;
891 ✗ case 1:
892 ✗ flag = bytestream2_get_be16(&gb);
893 ✗ cols = bytestream2_get_be16(&gb);
894 ✗ groups = bytestream2_get_be16(&gb);
895
896 ✗ for (g = 0; g < groups; g++) {
897 ✗ offset = bytestream2_get_be16(&gb);
898
899 ✗ if (cols * bpp == 0 || bytestream2_get_bytes_left(&gb) < cols * bpp) {
900 ✗ av_log(NULL, AV_LOG_ERROR, "cols*bpp is invalid (%"PRId32"*%d)", cols, bpp);
901 ✗ return;
902 }
903
904 ✗ if (kludge_j)
905 ✗ offset = ((offset / (320 / 8)) * pitch) + (offset % (320 / 8)) - kludge_j;
906 else
907 ✗ offset = ((offset / planepitch_byte) * pitch) + (offset % planepitch_byte);
908
909 ✗ for (b = 0; b < cols; b++) {
910 ✗ for (d = 0; d < bpp; d++) {
911 ✗ uint8_t value = bytestream2_get_byte(&gb);
912
913 ✗ if (offset >= dst_size)
914 ✗ return;
915 ✗ ptr = dst + offset;
916
917 ✗ if (flag)
918 ✗ ptr[0] ^= value;
919 else
920 ✗ ptr[0] = value;
921
922 ✗ offset += planepitch;
923 }
924 }
925 ✗ if ((cols * bpp) & 1)
926 ✗ bytestream2_skip(&gb, 1);
927 }
928 ✗ break;
929 ✗ case 2:
930 ✗ flag = bytestream2_get_be16(&gb);
931 ✗ rows = bytestream2_get_be16(&gb);
932 ✗ bytes = bytestream2_get_be16(&gb);
933 ✗ groups = bytestream2_get_be16(&gb);
934
935 ✗ for (g = 0; g < groups; g++) {
936 ✗ offset = bytestream2_get_be16(&gb);
937
938 ✗ if (kludge_j)
939 ✗ offset = ((offset / (320 / 8)) * pitch) + (offset % (320/ 8)) - kludge_j;
940 else
941 ✗ offset = ((offset / planepitch_byte) * pitch) + (offset % planepitch_byte);
942
943 ✗ for (r = 0; r < rows; r++) {
944 ✗ for (d = 0; d < bpp; d++) {
945 ✗ unsigned noffset = offset + (r * pitch) + d * planepitch;
946
947 ✗ if (!bytes || bytestream2_get_bytes_left(&gb) < bytes) {
948 ✗ av_log(NULL, AV_LOG_ERROR, "bytes %"PRId32" is invalid", bytes);
949 ✗ return;
950 }
951
952 ✗ for (b = 0; b < bytes; b++) {
953 ✗ uint8_t value = bytestream2_get_byte(&gb);
954
955 ✗ if (noffset >= dst_size)
956 ✗ return;
957 ✗ ptr = dst + noffset;
958
959 ✗ if (flag)
960 ✗ ptr[0] ^= value;
961 else
962 ✗ ptr[0] = value;
963
964 ✗ noffset++;
965 }
966 }
967 }
968 ✗ if ((rows * bytes * bpp) & 1)
969 ✗ bytestream2_skip(&gb, 1);
970 }
971 ✗ break;
972 ✗ default:
973 ✗ return;
974 }
975 }
976 }
977
978 ✗ static void decode_short_vertical_delta(uint8_t *dst,
979 const uint8_t *buf, const uint8_t *buf_end,
980 int w, int bpp, int dst_size)
981 {
982 ✗ int ncolumns = (w + 15) >> 4;
983 ✗ int dstpitch = ncolumns * bpp * 2;
984 unsigned ofsdst, ofssrc, ofsdata, opcode, x;
985 GetByteContext ptrs, gb, dptrs, dgb;
986 PutByteContext pb;
987 int i, j, k;
988
989 ✗ if (buf_end - buf <= 64)
990 ✗ return;
991
992 ✗ bytestream2_init(&ptrs, buf, buf_end - buf);
993 ✗ bytestream2_init(&dptrs, buf + 32, (buf_end - buf) - 32);
994 ✗ bytestream2_init_writer(&pb, dst, dst_size);
995
996 ✗ for (k = 0; k < bpp; k++) {
997 ✗ ofssrc = bytestream2_get_be32(&ptrs);
998 ✗ ofsdata = bytestream2_get_be32(&dptrs);
999
1000 ✗ if (!ofssrc)
1001 ✗ continue;
1002
1003 ✗ if (ofssrc >= buf_end - buf)
1004 ✗ return;
1005
1006 ✗ if (ofsdata >= buf_end - buf)
1007 ✗ return;
1008
1009 ✗ bytestream2_init(&gb, buf + ofssrc, buf_end - (buf + ofssrc));
1010 ✗ bytestream2_init(&dgb, buf + ofsdata, buf_end - (buf + ofsdata));
1011 ✗ for (j = 0; j < ncolumns; j++) {
1012 ✗ ofsdst = (j + k * ncolumns) * 2;
1013
1014 ✗ i = bytestream2_get_byte(&gb);
1015 ✗ while (i > 0) {
1016 ✗ opcode = bytestream2_get_byte(&gb);
1017
1018 ✗ if (opcode == 0) {
1019 ✗ opcode = bytestream2_get_byte(&gb);
1020 ✗ x = bytestream2_get_be16(&dgb);
1021
1022 ✗ while (opcode) {
1023 ✗ bytestream2_seek_p(&pb, ofsdst, SEEK_SET);
1024 ✗ bytestream2_put_be16(&pb, x);
1025 ✗ ofsdst += dstpitch;
1026 ✗ opcode--;
1027 }
1028 ✗ } else if (opcode < 0x80) {
1029 ✗ ofsdst += opcode * dstpitch;
1030 } else {
1031 ✗ opcode &= 0x7f;
1032
1033 ✗ while (opcode) {
1034 ✗ bytestream2_seek_p(&pb, ofsdst, SEEK_SET);
1035 ✗ bytestream2_put_be16(&pb, bytestream2_get_be16(&dgb));
1036 ✗ ofsdst += dstpitch;
1037 ✗ opcode--;
1038 }
1039 }
1040 ✗ i--;
1041 }
1042 }
1043 }
1044 }
1045
1046 ✗ static void decode_long_vertical_delta(uint8_t *dst,
1047 const uint8_t *buf, const uint8_t *buf_end,
1048 int w, int bpp, int dst_size)
1049 {
1050 ✗ int ncolumns = (w + 31) >> 5;
1051 ✗ int dstpitch = ((w + 15) / 16 * 2) * bpp;
1052 unsigned ofsdst, ofssrc, ofsdata, opcode, x;
1053 GetByteContext ptrs, gb, dptrs, dgb;
1054 PutByteContext pb;
1055 int i, j, k, h;
1056
1057 ✗ if (buf_end - buf <= 64)
1058 ✗ return;
1059
1060 ✗ h = (((w + 15) / 16 * 2) != ((w + 31) / 32 * 4)) ? 1 : 0;
1061 ✗ bytestream2_init(&ptrs, buf, buf_end - buf);
1062 ✗ bytestream2_init(&dptrs, buf + 32, (buf_end - buf) - 32);
1063 ✗ bytestream2_init_writer(&pb, dst, dst_size);
1064
1065 ✗ for (k = 0; k < bpp; k++) {
1066 ✗ ofssrc = bytestream2_get_be32(&ptrs);
1067 ✗ ofsdata = bytestream2_get_be32(&dptrs);
1068
1069 ✗ if (!ofssrc)
1070 ✗ continue;
1071
1072 ✗ if (ofssrc >= buf_end - buf)
1073 ✗ return;
1074
1075 ✗ if (ofsdata >= buf_end - buf)
1076 ✗ return;
1077
1078 ✗ bytestream2_init(&gb, buf + ofssrc, buf_end - (buf + ofssrc));
1079 ✗ bytestream2_init(&dgb, buf + ofsdata, buf_end - (buf + ofsdata));
1080 ✗ for (j = 0; j < ncolumns; j++) {
1081 ✗ ofsdst = (j + k * ncolumns) * 4 - h * (2 * k);
1082
1083 ✗ i = bytestream2_get_byte(&gb);
1084 ✗ while (i > 0) {
1085 ✗ opcode = bytestream2_get_byte(&gb);
1086
1087 ✗ if (opcode == 0) {
1088 ✗ opcode = bytestream2_get_byte(&gb);
1089 ✗ if (h && (j == (ncolumns - 1))) {
1090 ✗ x = bytestream2_get_be16(&dgb);
1091 ✗ bytestream2_skip(&dgb, 2);
1092 } else {
1093 ✗ x = bytestream2_get_be32(&dgb);
1094 }
1095
1096 ✗ if (ofsdst + (opcode - 1LL) * dstpitch > bytestream2_size_p(&pb))
1097 ✗ return;
1098
1099 ✗ while (opcode) {
1100 ✗ bytestream2_seek_p(&pb, ofsdst, SEEK_SET);
1101 ✗ if (h && (j == (ncolumns - 1))) {
1102 ✗ bytestream2_put_be16(&pb, x);
1103 } else {
1104 ✗ bytestream2_put_be32(&pb, x);
1105 }
1106 ✗ ofsdst += dstpitch;
1107 ✗ opcode--;
1108 }
1109 ✗ } else if (opcode < 0x80) {
1110 ✗ ofsdst += opcode * dstpitch;
1111 } else {
1112 ✗ opcode &= 0x7f;
1113
1114 ✗ while (opcode) {
1115 ✗ bytestream2_seek_p(&pb, ofsdst, SEEK_SET);
1116 ✗ if (h && (j == (ncolumns - 1))) {
1117 ✗ bytestream2_put_be16(&pb, bytestream2_get_be16(&dgb));
1118 ✗ bytestream2_skip(&dgb, 2);
1119 } else {
1120 ✗ bytestream2_put_be32(&pb, bytestream2_get_be32(&dgb));
1121 }
1122 ✗ ofsdst += dstpitch;
1123 ✗ opcode--;
1124 }
1125 }
1126 ✗ i--;
1127 }
1128 }
1129 }
1130 }
1131
1132 ✗ static void decode_short_vertical_delta2(uint8_t *dst,
1133 const uint8_t *buf, const uint8_t *buf_end,
1134 int w, int bpp, int dst_size)
1135 {
1136 ✗ int ncolumns = (w + 15) >> 4;
1137 ✗ int dstpitch = ncolumns * bpp * 2;
1138 unsigned ofsdst, ofssrc, opcode, x;
1139 GetByteContext ptrs, gb;
1140 PutByteContext pb;
1141 int i, j, k;
1142
1143 ✗ bytestream2_init(&ptrs, buf, buf_end - buf);
1144 ✗ bytestream2_init_writer(&pb, dst, dst_size);
1145
1146 ✗ for (k = 0; k < bpp; k++) {
1147 ✗ ofssrc = bytestream2_get_be32(&ptrs);
1148
1149 ✗ if (!ofssrc)
1150 ✗ continue;
1151
1152 ✗ if (ofssrc >= buf_end - buf)
1153 ✗ continue;
1154
1155 ✗ bytestream2_init(&gb, buf + ofssrc, buf_end - (buf + ofssrc));
1156 ✗ for (j = 0; j < ncolumns; j++) {
1157 ✗ ofsdst = (j + k * ncolumns) * 2;
1158
1159 ✗ i = bytestream2_get_be16(&gb);
1160 ✗ while (i > 0 && bytestream2_get_bytes_left(&gb) > 4) {
1161 ✗ opcode = bytestream2_get_be16(&gb);
1162
1163 ✗ if (opcode == 0) {
1164 ✗ opcode = bytestream2_get_be16(&gb);
1165 ✗ x = bytestream2_get_be16(&gb);
1166
1167 ✗ while (opcode && bytestream2_get_bytes_left_p(&pb) > 1) {
1168 ✗ bytestream2_seek_p(&pb, ofsdst, SEEK_SET);
1169 ✗ bytestream2_put_be16(&pb, x);
1170 ✗ ofsdst += dstpitch;
1171 ✗ opcode--;
1172 }
1173 ✗ } else if (opcode < 0x8000) {
1174 ✗ ofsdst += opcode * dstpitch;
1175 } else {
1176 ✗ opcode &= 0x7fff;
1177
1178 ✗ while (opcode && bytestream2_get_bytes_left(&gb) > 1 &&
1179 ✗ bytestream2_get_bytes_left_p(&pb) > 1) {
1180 ✗ bytestream2_seek_p(&pb, ofsdst, SEEK_SET);
1181 ✗ bytestream2_put_be16(&pb, bytestream2_get_be16(&gb));
1182 ✗ ofsdst += dstpitch;
1183 ✗ opcode--;
1184 }
1185 }
1186 ✗ i--;
1187 }
1188 }
1189 }
1190 }
1191
1192 ✗ static void decode_long_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 + 31) >> 5;
1197 ✗ int dstpitch = ((w + 15) / 16 * 2) * bpp;
1198 unsigned ofsdst, ofssrc, opcode, x;
1199 ✗ unsigned skip = 0x80000000, mask = skip - 1;
1200 GetByteContext ptrs, gb;
1201 PutByteContext pb;
1202 int i, j, k, h;
1203
1204 ✗ h = (((w + 15) / 16 * 2) != ((w + 31) / 32 * 4)) ? 1 : 0;
1205 ✗ bytestream2_init(&ptrs, buf, buf_end - buf);
1206 ✗ bytestream2_init_writer(&pb, dst, dst_size);
1207
1208 ✗ for (k = 0; k < bpp; k++) {
1209 ✗ ofssrc = bytestream2_get_be32(&ptrs);
1210
1211 ✗ if (!ofssrc)
1212 ✗ continue;
1213
1214 ✗ if (ofssrc >= buf_end - buf)
1215 ✗ continue;
1216
1217 ✗ bytestream2_init(&gb, buf + ofssrc, buf_end - (buf + ofssrc));
1218 ✗ for (j = 0; j < ncolumns; j++) {
1219 ✗ ofsdst = (j + k * ncolumns) * 4 - h * (2 * k);
1220
1221 ✗ if (h && (j == (ncolumns - 1))) {
1222 ✗ skip = 0x8000;
1223 ✗ mask = skip - 1;
1224 }
1225
1226 ✗ i = bytestream2_get_be32(&gb);
1227 ✗ while (i > 0 && bytestream2_get_bytes_left(&gb) > 4) {
1228 ✗ opcode = bytestream2_get_be32(&gb);
1229
1230 ✗ if (opcode == 0) {
1231 ✗ if (h && (j == ncolumns - 1)) {
1232 ✗ opcode = bytestream2_get_be16(&gb);
1233 ✗ x = bytestream2_get_be16(&gb);
1234 } else {
1235 ✗ opcode = bytestream2_get_be32(&gb);
1236 ✗ x = bytestream2_get_be32(&gb);
1237 }
1238
1239 ✗ if (ofsdst + (opcode - 1LL) * dstpitch > bytestream2_size_p(&pb))
1240 ✗ return;
1241
1242 ✗ while (opcode && bytestream2_get_bytes_left_p(&pb) > 1) {
1243 ✗ bytestream2_seek_p(&pb, ofsdst, SEEK_SET);
1244 ✗ if (h && (j == ncolumns - 1))
1245 ✗ bytestream2_put_be16(&pb, x);
1246 else
1247 ✗ bytestream2_put_be32(&pb, x);
1248 ✗ ofsdst += dstpitch;
1249 ✗ opcode--;
1250 }
1251 ✗ } else if (opcode < skip) {
1252 ✗ ofsdst += opcode * dstpitch;
1253 } else {
1254 ✗ opcode &= mask;
1255
1256 ✗ while (opcode && bytestream2_get_bytes_left(&gb) > 1 &&
1257 ✗ bytestream2_get_bytes_left_p(&pb) > 1) {
1258 ✗ bytestream2_seek_p(&pb, ofsdst, SEEK_SET);
1259 ✗ if (h && (j == ncolumns - 1)) {
1260 ✗ bytestream2_put_be16(&pb, bytestream2_get_be16(&gb));
1261 } else {
1262 ✗ bytestream2_put_be32(&pb, bytestream2_get_be32(&gb));
1263 }
1264 ✗ ofsdst += dstpitch;
1265 ✗ opcode--;
1266 }
1267 }
1268 ✗ i--;
1269 }
1270 }
1271 }
1272 }
1273
1274 ✗ static void decode_delta_d(uint8_t *dst,
1275 const uint8_t *buf, const uint8_t *buf_end,
1276 int w, int flag, int bpp, int dst_size)
1277 {
1278 ✗ int planepitch = FFALIGN(w, 16) >> 3;
1279 ✗ int pitch = planepitch * bpp;
1280 ✗ int planepitch_byte = (w + 7) / 8;
1281 unsigned entries, ofssrc;
1282 GetByteContext gb, ptrs;
1283 PutByteContext pb;
1284 int k;
1285
1286 ✗ if (buf_end - buf <= 4 * bpp)
1287 ✗ return;
1288
1289 ✗ bytestream2_init_writer(&pb, dst, dst_size);
1290 ✗ bytestream2_init(&ptrs, buf, bpp * 4);
1291
1292 ✗ for (k = 0; k < bpp; k++) {
1293 ✗ ofssrc = bytestream2_get_be32(&ptrs);
1294
1295 ✗ if (!ofssrc)
1296 ✗ continue;
1297
1298 ✗ if (ofssrc >= buf_end - buf)
1299 ✗ continue;
1300
1301 ✗ bytestream2_init(&gb, buf + ofssrc, buf_end - (buf + ofssrc));
1302
1303 ✗ entries = bytestream2_get_be32(&gb);
1304 ✗ if (entries * 8LL > bytestream2_get_bytes_left(&gb))
1305 ✗ return;
1306
1307 ✗ while (entries && bytestream2_get_bytes_left(&gb) >= 8) {
1308 ✗ int32_t opcode = bytestream2_get_be32(&gb);
1309 ✗ unsigned offset = bytestream2_get_be32(&gb);
1310
1311 ✗ bytestream2_seek_p(&pb, (offset / planepitch_byte) * pitch + (offset % planepitch_byte) + k * planepitch, SEEK_SET);
1312 ✗ if (opcode >= 0) {
1313 ✗ uint32_t x = bytestream2_get_be32(&gb);
1314 ✗ if (opcode && 4 + (opcode - 1LL) * pitch > bytestream2_get_bytes_left_p(&pb))
1315 ✗ continue;
1316 ✗ while (opcode && bytestream2_get_bytes_left_p(&pb) > 0) {
1317 ✗ bytestream2_put_be32(&pb, x);
1318 ✗ bytestream2_skip_p(&pb, pitch - 4);
1319 ✗ opcode--;
1320 }
1321 } else {
1322 ✗ while (opcode && bytestream2_get_bytes_left(&gb) > 0) {
1323 ✗ bytestream2_put_be32(&pb, bytestream2_get_be32(&gb));
1324 ✗ bytestream2_skip_p(&pb, pitch - 4);
1325 ✗ opcode++;
1326 }
1327 }
1328 ✗ entries--;
1329 }
1330 }
1331 }
1332
1333 ✗ static void decode_delta_e(uint8_t *dst,
1334 const uint8_t *buf, const uint8_t *buf_end,
1335 int w, int flag, int bpp, int dst_size)
1336 {
1337 ✗ int planepitch = FFALIGN(w, 16) >> 3;
1338 ✗ int pitch = planepitch * bpp;
1339 ✗ int planepitch_byte = (w + 7) / 8;
1340 unsigned entries, ofssrc;
1341 GetByteContext gb, ptrs;
1342 PutByteContext pb;
1343 int k;
1344
1345 ✗ if (buf_end - buf <= 4 * bpp)
1346 ✗ return;
1347
1348 ✗ bytestream2_init_writer(&pb, dst, dst_size);
1349 ✗ bytestream2_init(&ptrs, buf, bpp * 4);
1350
1351 ✗ for (k = 0; k < bpp; k++) {
1352 ✗ ofssrc = bytestream2_get_be32(&ptrs);
1353
1354 ✗ if (!ofssrc)
1355 ✗ continue;
1356
1357 ✗ if (ofssrc >= buf_end - buf)
1358 ✗ continue;
1359
1360 ✗ bytestream2_init(&gb, buf + ofssrc, buf_end - (buf + ofssrc));
1361
1362 ✗ entries = bytestream2_get_be16(&gb);
1363 ✗ while (entries && bytestream2_get_bytes_left(&gb) >= 6) {
1364 ✗ int16_t opcode = bytestream2_get_be16(&gb);
1365 ✗ unsigned offset = bytestream2_get_be32(&gb);
1366
1367 ✗ bytestream2_seek_p(&pb, (offset / planepitch_byte) * pitch + (offset % planepitch_byte) + k * planepitch, SEEK_SET);
1368 ✗ if (opcode >= 0) {
1369 ✗ uint16_t x = bytestream2_get_be16(&gb);
1370 ✗ while (opcode && bytestream2_get_bytes_left_p(&pb) > 0) {
1371 ✗ bytestream2_put_be16(&pb, x);
1372 ✗ bytestream2_skip_p(&pb, pitch - 2);
1373 ✗ opcode--;
1374 }
1375 } else {
1376 ✗ opcode = -opcode;
1377 ✗ while (opcode && bytestream2_get_bytes_left(&gb) > 0) {
1378 ✗ bytestream2_put_be16(&pb, bytestream2_get_be16(&gb));
1379 ✗ bytestream2_skip_p(&pb, pitch - 2);
1380 ✗ opcode--;
1381 }
1382 }
1383 ✗ entries--;
1384 }
1385 }
1386 }
1387
1388 ✗ static void decode_delta_l(uint8_t *dst,
1389 const uint8_t *buf, const uint8_t *buf_end,
1390 int w, int flag, int bpp, int dst_size)
1391 {
1392 GetByteContext off0, off1, dgb, ogb;
1393 PutByteContext pb;
1394 unsigned poff0, poff1;
1395 int i, k, dstpitch;
1396 ✗ int planepitch_byte = (w + 7) / 8;
1397 ✗ int planepitch = ((w + 15) / 16) * 2;
1398 ✗ int pitch = planepitch * bpp;
1399 ✗ int count = 0;
1400
1401 ✗ if (buf_end - buf <= 64)
1402 ✗ return;
1403
1404 ✗ bytestream2_init(&off0, buf, buf_end - buf);
1405 ✗ bytestream2_init(&off1, buf + 32, buf_end - (buf + 32));
1406 ✗ bytestream2_init_writer(&pb, dst, dst_size);
1407
1408 ✗ dstpitch = flag ? (((w + 7) / 8) * bpp): 2;
1409
1410 ✗ for (k = 0; k < bpp; k++) {
1411 ✗ poff0 = bytestream2_get_be32(&off0);
1412 ✗ poff1 = bytestream2_get_be32(&off1);
1413
1414 ✗ if (!poff0)
1415 ✗ continue;
1416
1417 ✗ if (2LL * poff0 >= buf_end - buf)
1418 ✗ return;
1419
1420 ✗ if (2LL * poff1 >= buf_end - buf)
1421 ✗ return;
1422
1423 ✗ bytestream2_init(&dgb, buf + 2 * poff0, buf_end - (buf + 2 * poff0));
1424 ✗ bytestream2_init(&ogb, buf + 2 * poff1, buf_end - (buf + 2 * poff1));
1425
1426 ✗ while (bytestream2_peek_be16(&ogb) != 0xFFFF && bytestream2_get_bytes_left(&ogb) >= 4) {
1427 ✗ uint32_t offset = bytestream2_get_be16(&ogb);
1428 ✗ int16_t cnt = bytestream2_get_be16(&ogb);
1429 uint16_t data;
1430
1431 ✗ if (count > dst_size)
1432 ✗ break;
1433 ✗ offset = ((2 * offset) / planepitch_byte) * pitch + ((2 * offset) % planepitch_byte) + k * planepitch;
1434 ✗ if (cnt < 0) {
1435 ✗ if (bytestream2_get_bytes_left(&dgb) < 2)
1436 ✗ break;
1437 ✗ bytestream2_seek_p(&pb, offset, SEEK_SET);
1438 ✗ cnt = -cnt;
1439 ✗ data = bytestream2_get_be16(&dgb);
1440 ✗ count += cnt;
1441 ✗ for (i = 0; i < cnt; i++) {
1442 ✗ bytestream2_put_be16(&pb, data);
1443 ✗ bytestream2_skip_p(&pb, dstpitch - 2);
1444 }
1445 } else {
1446 ✗ if (bytestream2_get_bytes_left(&dgb) < 2*cnt)
1447 ✗ break;
1448 ✗ bytestream2_seek_p(&pb, offset, SEEK_SET);
1449 ✗ count += cnt;
1450 ✗ for (i = 0; i < cnt; i++) {
1451 ✗ data = bytestream2_get_be16(&dgb);
1452 ✗ bytestream2_put_be16(&pb, data);
1453 ✗ bytestream2_skip_p(&pb, dstpitch - 2);
1454 }
1455 }
1456 }
1457 }
1458 }
1459
1460 ✗ static int unsupported(AVCodecContext *avctx)
1461 {
1462 ✗ IffContext *s = avctx->priv_data;
1463 ✗ avpriv_request_sample(avctx, "bitmap (compression 0x%0x, bpp %i, ham %i, interlaced %i)", s->compression, s->bpp, s->ham, s->is_interlaced);
1464 ✗ return AVERROR_INVALIDDATA;
1465 }
1466
1467 2 static int parse_packet_header(AVCodecContext *const avctx,
1468 GetByteContext *gb)
1469 {
1470 2 IffContext *s = avctx->priv_data;
1471
1472
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 2 if (avctx->codec_tag != MKTAG('A', 'N', 'I', 'M'))
1473 2 return 0;
1474
1475 ✗ bytestream2_skip(gb, 4);
1476 ✗ while (bytestream2_get_bytes_left(gb) >= 1) {
1477 ✗ uint32_t chunk_id = bytestream2_get_le32(gb);
1478 ✗ uint64_t data_size = bytestream2_get_be32(gb);
1479
1480 ✗ if (chunk_id == MKTAG('B', 'M', 'H', 'D')) {
1481 ✗ bytestream2_skip(gb, data_size + (data_size & 1));
1482 ✗ } else if (chunk_id == MKTAG('A', 'N', 'H', 'D')) {
1483 unsigned extra;
1484 ✗ if (data_size < 40)
1485 ✗ return AVERROR_INVALIDDATA;
1486
1487 ✗ s->compression = (bytestream2_get_byte(gb) << 8) | (s->compression & 0xFF);
1488 ✗ bytestream2_skip(gb, 19);
1489 ✗ extra = bytestream2_get_be32(gb);
1490 ✗ s->is_short = !(extra & 1);
1491 ✗ s->is_brush = extra == 2;
1492 ✗ s->is_interlaced = !!(extra & 0x40);
1493 ✗ data_size -= 24;
1494 ✗ bytestream2_skip(gb, data_size + (data_size & 1));
1495 ✗ } else if (chunk_id == MKTAG('D', 'L', 'T', 'A') ||
1496 chunk_id == MKTAG('B', 'O', 'D', 'Y')) {
1497 ✗ if (chunk_id == MKTAG('B','O','D','Y'))
1498 ✗ s->compression &= 0xFF;
1499 ✗ break;
1500 ✗ } else if (chunk_id == MKTAG('C', 'M', 'A', 'P')) {
1501 ✗ int count = data_size / 3;
1502 ✗ uint32_t *pal = s->pal;
1503
1504 ✗ if (count > 256)
1505 ✗ return AVERROR_INVALIDDATA;
1506 ✗ if (s->ham) {
1507 ✗ for (int i = 0; i < count; i++)
1508 ✗ pal[i] = 0xFF000000 | bytestream2_get_le24(gb);
1509 } else {
1510 ✗ for (int i = 0; i < count; i++)
1511 ✗ pal[i] = 0xFF000000 | bytestream2_get_be24(gb);
1512 }
1513 ✗ bytestream2_skip(gb, data_size & 1);
1514 } else {
1515 ✗ bytestream2_skip(gb, data_size + (data_size&1));
1516 }
1517 }
1518
1519 ✗ return 0;
1520 }
1521
1522 2 static int decode_frame(AVCodecContext *avctx, AVFrame *frame,
1523 int *got_frame, AVPacket *avpkt)
1524 {
1525 2 IffContext *s = avctx->priv_data;
1526 2 const uint8_t *buf = avpkt->data;
1527 2 int buf_size = avpkt->size;
1528 2 const uint8_t *buf_end = buf + buf_size;
1529 int y, plane, res;
1530 2 GetByteContext gb0, *const gb = &gb0;
1531 const AVPixFmtDescriptor *desc;
1532
1533 2 bytestream2_init(gb, avpkt->data, avpkt->size);
1534
1535
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 2 if ((res = parse_packet_header(avctx, gb)) < 0)
1536 ✗ return res;
1537
1538
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 2 if ((res = ff_get_buffer(avctx, frame, 0)) < 0)
1539 ✗ return res;
1540
1541 2 buf += bytestream2_tell(gb);
1542 2 buf_size -= bytestream2_tell(gb);
1543 2 desc = av_pix_fmt_desc_get(avctx->pix_fmt);
1544
1545
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 2 if (!s->init && avctx->bits_per_coded_sample <= 8 - (s->masking == MASK_HAS_MASK) &&
1546
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 2 avctx->pix_fmt == AV_PIX_FMT_PAL8) {
1547
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 2 if ((res = cmap_read_palette(avctx, (uint32_t *)frame->data[1])) < 0)
1548 ✗ return res;
1549 ✗ } else if (!s->init && avctx->bits_per_coded_sample <= 8 &&
1550 ✗ avctx->pix_fmt == AV_PIX_FMT_RGB32) {
1551 ✗ if ((res = cmap_read_palette(avctx, s->mask_palbuf)) < 0)
1552 ✗ return res;
1553 }
1554 2 s->init = 1;
1555
1556
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 2 if (s->compression <= 0xff && (avctx->codec_tag == MKTAG('A', 'N', 'I', 'M'))) {
1557 ✗ if (avctx->pix_fmt == AV_PIX_FMT_PAL8)
1558 ✗ memcpy(s->pal, frame->data[1], 256 * 4);
1559 }
1560
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 2 switch (s->compression) {
1562 1 case 0x0:
1563
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 1 if (avctx->codec_tag == MKTAG('A', 'C', 'B', 'M')) {
1564 ✗ if (avctx->pix_fmt == AV_PIX_FMT_PAL8 || avctx->pix_fmt == AV_PIX_FMT_GRAY8) {
1565 ✗ memset(frame->data[0], 0, avctx->height * frame->linesize[0]);
1566 ✗ for (plane = 0; plane < s->bpp; plane++) {
1567 ✗ for (y = 0; y < avctx->height && buf < buf_end; y++) {
1568 ✗ uint8_t *row = &frame->data[0][y * frame->linesize[0]];
1569 ✗ decodeplane8(row, buf, FFMIN(s->planesize, buf_end - buf), plane);
1570 ✗ buf += s->planesize;
1571 }
1572 }
1573 ✗ } else if (s->ham) { // HAM to AV_PIX_FMT_BGR32
1574 ✗ memset(frame->data[0], 0, avctx->height * frame->linesize[0]);
1575 ✗ for (y = 0; y < avctx->height; y++) {
1576 ✗ uint8_t *row = &frame->data[0][y * frame->linesize[0]];
1577 ✗ memset(s->ham_buf, 0, s->planesize * 8);
1578 ✗ for (plane = 0; plane < s->bpp; plane++) {
1579 ✗ const uint8_t * start = buf + (plane * avctx->height + y) * s->planesize;
1580 ✗ if (start >= buf_end)
1581 ✗ break;
1582 ✗ decodeplane8(s->ham_buf, start, FFMIN(s->planesize, buf_end - start), plane);
1583 }
1584 ✗ decode_ham_plane32((uint32_t *)row, s->ham_buf, s->ham_palbuf, s->planesize);
1585 }
1586 } else
1587 ✗ return unsupported(avctx);
1588
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 1 } else if (avctx->codec_tag == MKTAG('D', 'E', 'E', 'P')) {
1589 ✗ int raw_width = avctx->width * (av_get_bits_per_pixel(desc) >> 3);
1590 int x;
1591 ✗ for (y = 0; y < avctx->height && buf < buf_end; y++) {
1592 ✗ uint8_t *row = &frame->data[0][y * frame->linesize[0]];
1593 ✗ memcpy(row, buf, FFMIN(raw_width, buf_end - buf));
1594 ✗ buf += raw_width;
1595 ✗ if (avctx->pix_fmt == AV_PIX_FMT_BGR32) {
1596 ✗ for (x = 0; x < avctx->width; x++)
1597 ✗ row[4 * x + 3] = row[4 * x + 3] & 0xF0 | (row[4 * x + 3] >> 4);
1598 }
1599 }
1600
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 1 } else if (avctx->codec_tag == MKTAG('I', 'L', 'B', 'M') || // interleaved
1601 ✗ avctx->codec_tag == MKTAG('A', 'N', 'I', 'M')) {
1602
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 1 if (avctx->codec_tag == MKTAG('A', 'N', 'I', 'M'))
1603 ✗ memcpy(s->video[0], buf, FFMIN(buf_end - buf, s->video_size));
1604
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 1 if (avctx->pix_fmt == AV_PIX_FMT_PAL8 || avctx->pix_fmt == AV_PIX_FMT_GRAY8) {
1605
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 241 for (y = 0; y < avctx->height; y++) {
1606 240 uint8_t *row = &frame->data[0][y * frame->linesize[0]];
1607 240 memset(row, 0, avctx->width);
1608
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 2160 for (plane = 0; plane < s->bpp && buf < buf_end; plane++) {
1609 1920 decodeplane8(row, buf, FFMIN(s->planesize, buf_end - buf), plane);
1610 1920 buf += s->planesize;
1611 }
1612 }
1613 ✗ } else if (s->ham) { // HAM to AV_PIX_FMT_BGR32
1614 ✗ for (y = 0; y < avctx->height; y++) {
1615 ✗ uint8_t *row = &frame->data[0][y * frame->linesize[0]];
1616 ✗ memset(s->ham_buf, 0, s->planesize * 8);
1617 ✗ for (plane = 0; plane < s->bpp && buf < buf_end; plane++) {
1618 ✗ decodeplane8(s->ham_buf, buf, FFMIN(s->planesize, buf_end - buf), plane);
1619 ✗ buf += s->planesize;
1620 }
1621 ✗ decode_ham_plane32((uint32_t *)row, s->ham_buf, s->ham_palbuf, s->planesize);
1622 }
1623 } else { // AV_PIX_FMT_BGR32
1624 ✗ for (y = 0; y < avctx->height; y++) {
1625 ✗ uint8_t *row = &frame->data[0][y * frame->linesize[0]];
1626 ✗ memset(row, 0, avctx->width << 2);
1627 ✗ for (plane = 0; plane < s->bpp && buf < buf_end; plane++) {
1628 ✗ decodeplane32((uint32_t *)row, buf,
1629 ✗ FFMIN(s->planesize, buf_end - buf), plane);
1630 ✗ buf += s->planesize;
1631 }
1632 }
1633 }
1634 ✗ } else if (avctx->codec_tag == MKTAG('P', 'B', 'M', ' ')) { // IFF-PBM
1635 ✗ if (avctx->pix_fmt == AV_PIX_FMT_PAL8 || avctx->pix_fmt == AV_PIX_FMT_GRAY8) {
1636 ✗ for (y = 0; y < avctx->height && buf_end > buf; y++) {
1637 ✗ uint8_t *row = &frame->data[0][y * frame->linesize[0]];
1638 ✗ memcpy(row, buf, FFMIN(avctx->width, buf_end - buf));
1639 ✗ buf += avctx->width + (avctx->width % 2); // padding if odd
1640 }
1641 ✗ } else if (s->ham) { // IFF-PBM: HAM to AV_PIX_FMT_BGR32
1642 ✗ for (y = 0; y < avctx->height && buf_end > buf; y++) {
1643 ✗ uint8_t *row = &frame->data[0][y * frame->linesize[0]];
1644 ✗ memcpy(s->ham_buf, buf, FFMIN(avctx->width, buf_end - buf));
1645 ✗ buf += avctx->width + (avctx->width & 1); // padding if odd
1646 ✗ decode_ham_plane32((uint32_t *)row, s->ham_buf, s->ham_palbuf, s->planesize);
1647 }
1648 } else
1649 ✗ return unsupported(avctx);
1650 } else {
1651 ✗ return unsupported(avctx);
1652 }
1653 1 break;
1654 1 case 0x1:
1655
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 1 if (avctx->codec_tag == MKTAG('I', 'L', 'B', 'M') || // interleaved
1656
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 1 avctx->codec_tag == MKTAG('A', 'N', 'I', 'M')) {
1657 ✗ if (avctx->pix_fmt == AV_PIX_FMT_PAL8 || avctx->pix_fmt == AV_PIX_FMT_GRAY8) {
1658 ✗ uint8_t *video = s->video[0];
1659
1660 ✗ for (y = 0; y < avctx->height; y++) {
1661 ✗ uint8_t *row = &frame->data[0][y * frame->linesize[0]];
1662 ✗ memset(row, 0, avctx->width);
1663 ✗ for (plane = 0; plane < s->bpp; plane++) {
1664 ✗ buf += decode_byterun(s->planebuf, s->planesize, gb);
1665 ✗ if (avctx->codec_tag == MKTAG('A', 'N', 'I', 'M')) {
1666 ✗ memcpy(video, s->planebuf, s->planesize);
1667 ✗ video += s->planesize;
1668 }
1669 ✗ decodeplane8(row, s->planebuf, s->planesize, plane);
1670 }
1671 }
1672 ✗ } else if (avctx->bits_per_coded_sample <= 8) { //8-bit (+ mask) to AV_PIX_FMT_BGR32
1673 ✗ for (y = 0; y < avctx->height; y++) {
1674 ✗ uint8_t *row = &frame->data[0][y * frame->linesize[0]];
1675 ✗ memset(s->mask_buf, 0, avctx->width * sizeof(uint32_t));
1676 ✗ for (plane = 0; plane < s->bpp; plane++) {
1677 ✗ buf += decode_byterun(s->planebuf, s->planesize, gb);
1678 ✗ decodeplane32(s->mask_buf, s->planebuf, s->planesize, plane);
1679 }
1680 ✗ lookup_pal_indicies((uint32_t *)row, s->mask_buf, s->mask_palbuf, avctx->width);
1681 }
1682 ✗ } else if (s->ham) { // HAM to AV_PIX_FMT_BGR32
1683 ✗ uint8_t *video = s->video[0];
1684 ✗ for (y = 0; y < avctx->height; y++) {
1685 ✗ uint8_t *row = &frame->data[0][y * frame->linesize[0]];
1686 ✗ memset(s->ham_buf, 0, s->planesize * 8);
1687 ✗ for (plane = 0; plane < s->bpp; plane++) {
1688 ✗ buf += decode_byterun(s->planebuf, s->planesize, gb);
1689 ✗ if (avctx->codec_tag == MKTAG('A', 'N', 'I', 'M')) {
1690 ✗ memcpy(video, s->planebuf, s->planesize);
1691 ✗ video += s->planesize;
1692 }
1693 ✗ decodeplane8(s->ham_buf, s->planebuf, s->planesize, plane);
1694 }
1695 ✗ decode_ham_plane32((uint32_t *)row, s->ham_buf, s->ham_palbuf, s->planesize);
1696 }
1697 } else { // AV_PIX_FMT_BGR32
1698 ✗ for (y = 0; y < avctx->height; y++) {
1699 ✗ uint8_t *row = &frame->data[0][y * frame->linesize[0]];
1700 ✗ memset(row, 0, avctx->width << 2);
1701 ✗ for (plane = 0; plane < s->bpp; plane++) {
1702 ✗ buf += decode_byterun(s->planebuf, s->planesize, gb);
1703 ✗ decodeplane32((uint32_t *)row, s->planebuf, s->planesize, plane);
1704 }
1705 }
1706 }
1707
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 1 } else if (avctx->codec_tag == MKTAG('P', 'B', 'M', ' ')) { // IFF-PBM
1708
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 1 if (avctx->pix_fmt == AV_PIX_FMT_PAL8 || avctx->pix_fmt == AV_PIX_FMT_GRAY8) {
1709
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 241 for (y = 0; y < avctx->height; y++) {
1710 240 uint8_t *row = &frame->data[0][y * frame->linesize[0]];
1711 240 buf += decode_byterun(row, avctx->width, gb);
1712 }
1713 ✗ } else if (s->ham) { // IFF-PBM: HAM to AV_PIX_FMT_BGR32
1714 ✗ for (y = 0; y < avctx->height; y++) {
1715 ✗ uint8_t *row = &frame->data[0][y * frame->linesize[0]];
1716 ✗ buf += decode_byterun(s->ham_buf, avctx->width, gb);
1717 ✗ decode_ham_plane32((uint32_t *)row, s->ham_buf, s->ham_palbuf, s->planesize);
1718 }
1719 } else
1720 ✗ return unsupported(avctx);
1721 ✗ } else if (avctx->codec_tag == MKTAG('D', 'E', 'E', 'P')) { // IFF-DEEP
1722 ✗ if (av_get_bits_per_pixel(desc) == 32)
1723 ✗ decode_deep_rle32(frame->data[0], buf, buf_size, avctx->width, avctx->height, frame->linesize[0]);
1724 else
1725 ✗ return unsupported(avctx);
1726 ✗ } else if (avctx->codec_tag == MKTAG('A', 'C', 'B', 'M')) {
1727 ✗ if (avctx->pix_fmt == AV_PIX_FMT_PAL8 || avctx->pix_fmt == AV_PIX_FMT_GRAY8) {
1728 ✗ memset(frame->data[0], 0, avctx->height * frame->linesize[0]);
1729 ✗ for (plane = 0; plane < s->bpp; plane++) {
1730 ✗ for (y = 0; y < avctx->height && buf < buf_end; y++) {
1731 ✗ uint8_t *row = &frame->data[0][y * frame->linesize[0]];
1732 ✗ decodeplane8(row, buf, FFMIN(s->planesize, buf_end - buf), plane);
1733 ✗ buf += s->planesize;
1734 }
1735 }
1736 ✗ } else if (s->ham) { // HAM to AV_PIX_FMT_BGR32
1737 ✗ memset(frame->data[0], 0, avctx->height * frame->linesize[0]);
1738 ✗ for (y = 0; y < avctx->height; y++) {
1739 ✗ uint8_t *row = &frame->data[0][y * frame->linesize[0]];
1740 ✗ memset(s->ham_buf, 0, s->planesize * 8);
1741 ✗ for (plane = 0; plane < s->bpp; plane++) {
1742 ✗ const uint8_t * start = buf + (plane * avctx->height + y) * s->planesize;
1743 ✗ if (start >= buf_end)
1744 ✗ break;
1745 ✗ decodeplane8(s->ham_buf, start, FFMIN(s->planesize, buf_end - start), plane);
1746 }
1747 ✗ decode_ham_plane32((uint32_t *)row, s->ham_buf, s->ham_palbuf, s->planesize);
1748 }
1749 } else {
1750 ✗ return unsupported(avctx);
1751 }
1752 } else {
1753 ✗ return unsupported(avctx);
1754 }
1755 1 break;
1756 ✗ case 0x2:
1757 ✗ if (avctx->codec_tag == MKTAG('I', 'L', 'B', 'M') && avctx->pix_fmt == AV_PIX_FMT_PAL8) {
1758 ✗ for (plane = 0; plane < s->bpp; plane++) {
1759 ✗ decode_byterun2(s->planebuf, avctx->height, s->planesize, gb);
1760 ✗ for (y = 0; y < avctx->height; y++) {
1761 ✗ uint8_t *row = &frame->data[0][y * frame->linesize[0]];
1762 ✗ decodeplane8(row, s->planebuf + s->planesize * y, s->planesize, plane);
1763 }
1764 }
1765 } else {
1766 ✗ return unsupported(avctx);
1767 }
1768 ✗ break;
1769 ✗ case 0x4:
1770 ✗ if (avctx->codec_tag == MKTAG('R', 'G', 'B', '8') && avctx->pix_fmt == AV_PIX_FMT_RGB32)
1771 ✗ decode_rgb8(gb, frame->data[0], avctx->width, avctx->height, frame->linesize[0]);
1772 ✗ else if (avctx->codec_tag == MKTAG('R', 'G', 'B', 'N') && avctx->pix_fmt == AV_PIX_FMT_RGB444)
1773 ✗ decode_rgbn(gb, frame->data[0], avctx->width, avctx->height, frame->linesize[0]);
1774 else
1775 ✗ return unsupported(avctx);
1776 ✗ break;
1777 ✗ case 0x5:
1778 ✗ if (avctx->codec_tag == MKTAG('D', 'E', 'E', 'P')) {
1779 ✗ if (av_get_bits_per_pixel(desc) == 32)
1780 ✗ decode_deep_tvdc32(frame->data[0], buf, buf_size, avctx->width, avctx->height, frame->linesize[0], s->tvdc);
1781 else
1782 ✗ return unsupported(avctx);
1783 } else
1784 ✗ return unsupported(avctx);
1785 ✗ break;
1786 ✗ case 0x300:
1787 case 0x301:
1788 ✗ decode_short_horizontal_delta(s->video[0], buf, buf_end, avctx->width, s->bpp, s->video_size);
1789 ✗ break;
1790 ✗ case 0x500:
1791 case 0x501:
1792 ✗ decode_byte_vertical_delta(s->video[0], buf, buf_end, avctx->width, s->is_brush, s->bpp, s->video_size);
1793 ✗ break;
1794 ✗ case 0x700:
1795 case 0x701:
1796 ✗ if (s->is_short)
1797 ✗ decode_short_vertical_delta(s->video[0], buf, buf_end, avctx->width, s->bpp, s->video_size);
1798 else
1799 ✗ decode_long_vertical_delta(s->video[0], buf, buf_end, avctx->width, s->bpp, s->video_size);
1800 ✗ break;
1801 ✗ case 0x800:
1802 case 0x801:
1803 ✗ if (s->is_short)
1804 ✗ decode_short_vertical_delta2(s->video[0], buf, buf_end, avctx->width, s->bpp, s->video_size);
1805 else
1806 ✗ decode_long_vertical_delta2(s->video[0], buf, buf_end, avctx->width, s->bpp, s->video_size);
1807 ✗ break;
1808 ✗ case 0x4a00:
1809 case 0x4a01:
1810 ✗ decode_delta_j(s->video[0], buf, buf_end, avctx->width, avctx->height, s->bpp, s->video_size);
1811 ✗ break;
1812 ✗ case 0x6400:
1813 case 0x6401:
1814 ✗ if (s->is_interlaced)
1815 ✗ return unsupported(avctx);
1816 ✗ decode_delta_d(s->video[0], buf, buf_end, avctx->width, s->is_interlaced, s->bpp, s->video_size);
1817 ✗ break;
1818 ✗ case 0x6500:
1819 case 0x6501:
1820 ✗ if (s->is_interlaced)
1821 ✗ return unsupported(avctx);
1822 ✗ decode_delta_e(s->video[0], buf, buf_end, avctx->width, s->is_interlaced, s->bpp, s->video_size);
1823 ✗ break;
1824 ✗ case 0x6c00:
1825 case 0x6c01:
1826 ✗ decode_delta_l(s->video[0], buf, buf_end, avctx->width, s->is_short, s->bpp, s->video_size);
1827 ✗ break;
1828 ✗ default:
1829 ✗ return unsupported(avctx);
1830 }
1831
1832
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 2 if (s->compression <= 0xff && (avctx->codec_tag == MKTAG('A', 'N', 'I', 'M'))) {
1833 ✗ memcpy(s->video[1], s->video[0], s->video_size);
1834 }
1835
1836
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 2 if (s->compression > 0xff) {
1837 ✗ if (avctx->pix_fmt == AV_PIX_FMT_PAL8 || avctx->pix_fmt == AV_PIX_FMT_GRAY8) {
1838 ✗ buf = s->video[0];
1839 ✗ for (y = 0; y < avctx->height; y++) {
1840 ✗ uint8_t *row = &frame->data[0][y * frame->linesize[0]];
1841 ✗ memset(row, 0, avctx->width);
1842 ✗ for (plane = 0; plane < s->bpp; plane++) {
1843 ✗ decodeplane8(row, buf, s->planesize, plane);
1844 ✗ buf += s->planesize;
1845 }
1846 }
1847 ✗ if (avctx->pix_fmt == AV_PIX_FMT_PAL8)
1848 ✗ memcpy(frame->data[1], s->pal, 256 * 4);
1849 ✗ } else if (s->ham) {
1850 ✗ int i, count = 1 << s->ham;
1851
1852 ✗ buf = s->video[0];
1853 ✗ memset(s->ham_palbuf, 0, (1 << s->ham) * 2 * sizeof(uint32_t));
1854 ✗ for (i = 0; i < count; i++) {
1855 ✗ s->ham_palbuf[i*2+1] = s->pal[i];
1856 }
1857 ✗ for (i = 0; i < count; i++) {
1858 ✗ uint32_t tmp = i << (8 - s->ham);
1859 ✗ tmp |= tmp >> s->ham;
1860 ✗ s->ham_palbuf[(i+count)*2] = 0xFF00FFFF;
1861 ✗ s->ham_palbuf[(i+count*2)*2] = 0xFFFFFF00;
1862 ✗ s->ham_palbuf[(i+count*3)*2] = 0xFFFF00FF;
1863 ✗ s->ham_palbuf[(i+count)*2+1] = 0xFF000000 | tmp << 16;
1864 ✗ s->ham_palbuf[(i+count*2)*2+1] = 0xFF000000 | tmp;
1865 ✗ s->ham_palbuf[(i+count*3)*2+1] = 0xFF000000 | tmp << 8;
1866 }
1867 ✗ if (s->masking == MASK_HAS_MASK) {
1868 ✗ for (i = 0; i < 8 * (1 << s->ham); i++)
1869 ✗ s->ham_palbuf[(1 << s->bpp) + i] = s->ham_palbuf[i] | 0xFF000000;
1870 }
1871 ✗ for (y = 0; y < avctx->height; y++) {
1872 ✗ uint8_t *row = &frame->data[0][y * frame->linesize[0]];
1873 ✗ memset(s->ham_buf, 0, s->planesize * 8);
1874 ✗ for (plane = 0; plane < s->bpp; plane++) {
1875 ✗ decodeplane8(s->ham_buf, buf, s->planesize, plane);
1876 ✗ buf += s->planesize;
1877 }
1878 ✗ decode_ham_plane32((uint32_t *)row, s->ham_buf, s->ham_palbuf, s->planesize);
1879 }
1880 } else {
1881 ✗ return unsupported(avctx);
1882 }
1883
1884 ✗ if (!s->is_brush) {
1885 ✗ FFSWAP(uint8_t *, s->video[0], s->video[1]);
1886 }
1887 }
1888
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 2 if (avpkt->flags & AV_PKT_FLAG_KEY) {
1890 2 frame->key_frame = 1;
1891 2 frame->pict_type = AV_PICTURE_TYPE_I;
1892 } else {
1893 ✗ frame->key_frame = 0;
1894 ✗ frame->pict_type = AV_PICTURE_TYPE_P;
1895 }
1896
1897 2 *got_frame = 1;
1898
1899 2 return buf_size;
1900 }
1901
1902 const FFCodec ff_iff_ilbm_decoder = {
1903 .p.name = "iff",
1904 CODEC_LONG_NAME("IFF ACBM/ANIM/DEEP/ILBM/PBM/RGB8/RGBN"),
1905 .p.type = AVMEDIA_TYPE_VIDEO,
1906 .p.id = AV_CODEC_ID_IFF_ILBM,
1907 .priv_data_size = sizeof(IffContext),
1908 .init = decode_init,
1909 .close = decode_end,
1910 FF_CODEC_DECODE_CB(decode_frame),
1911 .p.capabilities = AV_CODEC_CAP_DR1,
1912 .caps_internal = FF_CODEC_CAP_INIT_CLEANUP,
1913 };
1914