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1 | /* |
2 | * IFF ACBM/DEEP/ILBM/PBM bitmap decoder | |
3 | * Copyright (c) 2010 Peter Ross <pross@xvid.org> | |
4 | * Copyright (c) 2010 Sebastian Vater <cdgs.basty@googlemail.com> | |
5 | * | |
6 | * This file is part of FFmpeg. | |
7 | * | |
8 | * FFmpeg is free software; you can redistribute it and/or | |
9 | * modify it under the terms of the GNU Lesser General Public | |
10 | * License as published by the Free Software Foundation; either | |
11 | * version 2.1 of the License, or (at your option) any later version. | |
12 | * | |
13 | * FFmpeg is distributed in the hope that it will be useful, | |
14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
16 | * Lesser General Public License for more details. | |
17 | * | |
18 | * You should have received a copy of the GNU Lesser General Public | |
19 | * License along with FFmpeg; if not, write to the Free Software | |
20 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | |
21 | */ | |
22 | ||
23 | /** | |
24 | * @file | |
25 | * IFF ACBM/DEEP/ILBM/PBM bitmap decoder | |
26 | */ | |
27 | ||
28 | #include <stdint.h> | |
29 | ||
30 | #include "libavutil/imgutils.h" | |
31 | #include "bytestream.h" | |
32 | #include "avcodec.h" | |
33 | #include "get_bits.h" | |
34 | #include "internal.h" | |
35 | ||
36 | // TODO: masking bits | |
37 | typedef enum { | |
38 | MASK_NONE, | |
39 | MASK_HAS_MASK, | |
40 | MASK_HAS_TRANSPARENT_COLOR, | |
41 | MASK_LASSO | |
42 | } mask_type; | |
43 | ||
44 | typedef struct { | |
45 | AVFrame *frame; | |
46 | int planesize; | |
47 | uint8_t * planebuf; | |
48 | uint8_t * ham_buf; ///< temporary buffer for planar to chunky conversation | |
49 | uint32_t *ham_palbuf; ///< HAM decode table | |
50 | uint32_t *mask_buf; ///< temporary buffer for palette indices | |
51 | uint32_t *mask_palbuf; ///< masking palette table | |
52 | unsigned compression; ///< delta compression method used | |
53 | unsigned bpp; ///< bits per plane to decode (differs from bits_per_coded_sample if HAM) | |
54 | unsigned ham; ///< 0 if non-HAM or number of hold bits (6 for bpp > 6, 4 otherwise) | |
55 | unsigned flags; ///< 1 for EHB, 0 is no extra half darkening | |
56 | unsigned transparency; ///< TODO: transparency color index in palette | |
57 | unsigned masking; ///< TODO: masking method used | |
58 | int init; // 1 if buffer and palette data already initialized, 0 otherwise | |
59 | int16_t tvdc[16]; ///< TVDC lookup table | |
60 | } IffContext; | |
61 | ||
62 | #define LUT8_PART(plane, v) \ | |
63 | AV_LE2NE64C(UINT64_C(0x0000000)<<32 | v) << plane, \ | |
64 | AV_LE2NE64C(UINT64_C(0x1000000)<<32 | v) << plane, \ | |
65 | AV_LE2NE64C(UINT64_C(0x0010000)<<32 | v) << plane, \ | |
66 | AV_LE2NE64C(UINT64_C(0x1010000)<<32 | v) << plane, \ | |
67 | AV_LE2NE64C(UINT64_C(0x0000100)<<32 | v) << plane, \ | |
68 | AV_LE2NE64C(UINT64_C(0x1000100)<<32 | v) << plane, \ | |
69 | AV_LE2NE64C(UINT64_C(0x0010100)<<32 | v) << plane, \ | |
70 | AV_LE2NE64C(UINT64_C(0x1010100)<<32 | v) << plane, \ | |
71 | AV_LE2NE64C(UINT64_C(0x0000001)<<32 | v) << plane, \ | |
72 | AV_LE2NE64C(UINT64_C(0x1000001)<<32 | v) << plane, \ | |
73 | AV_LE2NE64C(UINT64_C(0x0010001)<<32 | v) << plane, \ | |
74 | AV_LE2NE64C(UINT64_C(0x1010001)<<32 | v) << plane, \ | |
75 | AV_LE2NE64C(UINT64_C(0x0000101)<<32 | v) << plane, \ | |
76 | AV_LE2NE64C(UINT64_C(0x1000101)<<32 | v) << plane, \ | |
77 | AV_LE2NE64C(UINT64_C(0x0010101)<<32 | v) << plane, \ | |
78 | AV_LE2NE64C(UINT64_C(0x1010101)<<32 | v) << plane | |
79 | ||
80 | #define LUT8(plane) { \ | |
81 | LUT8_PART(plane, 0x0000000), \ | |
82 | LUT8_PART(plane, 0x1000000), \ | |
83 | LUT8_PART(plane, 0x0010000), \ | |
84 | LUT8_PART(plane, 0x1010000), \ | |
85 | LUT8_PART(plane, 0x0000100), \ | |
86 | LUT8_PART(plane, 0x1000100), \ | |
87 | LUT8_PART(plane, 0x0010100), \ | |
88 | LUT8_PART(plane, 0x1010100), \ | |
89 | LUT8_PART(plane, 0x0000001), \ | |
90 | LUT8_PART(plane, 0x1000001), \ | |
91 | LUT8_PART(plane, 0x0010001), \ | |
92 | LUT8_PART(plane, 0x1010001), \ | |
93 | LUT8_PART(plane, 0x0000101), \ | |
94 | LUT8_PART(plane, 0x1000101), \ | |
95 | LUT8_PART(plane, 0x0010101), \ | |
96 | LUT8_PART(plane, 0x1010101), \ | |
97 | } | |
98 | ||
99 | // 8 planes * 8-bit mask | |
100 | static const uint64_t plane8_lut[8][256] = { | |
101 | LUT8(0), LUT8(1), LUT8(2), LUT8(3), | |
102 | LUT8(4), LUT8(5), LUT8(6), LUT8(7), | |
103 | }; | |
104 | ||
105 | #define LUT32(plane) { \ | |
106 | 0, 0, 0, 0, \ | |
107 | 0, 0, 0, 1 << plane, \ | |
108 | 0, 0, 1 << plane, 0, \ | |
109 | 0, 0, 1 << plane, 1 << plane, \ | |
110 | 0, 1 << plane, 0, 0, \ | |
111 | 0, 1 << plane, 0, 1 << plane, \ | |
112 | 0, 1 << plane, 1 << plane, 0, \ | |
113 | 0, 1 << plane, 1 << plane, 1 << plane, \ | |
114 | 1 << plane, 0, 0, 0, \ | |
115 | 1 << plane, 0, 0, 1 << plane, \ | |
116 | 1 << plane, 0, 1 << plane, 0, \ | |
117 | 1 << plane, 0, 1 << plane, 1 << plane, \ | |
118 | 1 << plane, 1 << plane, 0, 0, \ | |
119 | 1 << plane, 1 << plane, 0, 1 << plane, \ | |
120 | 1 << plane, 1 << plane, 1 << plane, 0, \ | |
121 | 1 << plane, 1 << plane, 1 << plane, 1 << plane, \ | |
122 | } | |
123 | ||
124 | // 32 planes * 4-bit mask * 4 lookup tables each | |
125 | static const uint32_t plane32_lut[32][16*4] = { | |
126 | LUT32( 0), LUT32( 1), LUT32( 2), LUT32( 3), | |
127 | LUT32( 4), LUT32( 5), LUT32( 6), LUT32( 7), | |
128 | LUT32( 8), LUT32( 9), LUT32(10), LUT32(11), | |
129 | LUT32(12), LUT32(13), LUT32(14), LUT32(15), | |
130 | LUT32(16), LUT32(17), LUT32(18), LUT32(19), | |
131 | LUT32(20), LUT32(21), LUT32(22), LUT32(23), | |
132 | LUT32(24), LUT32(25), LUT32(26), LUT32(27), | |
133 | LUT32(28), LUT32(29), LUT32(30), LUT32(31), | |
134 | }; | |
135 | ||
136 | // Gray to RGB, required for palette table of grayscale images with bpp < 8 | |
137 | static av_always_inline uint32_t gray2rgb(const uint32_t x) { | |
138 | return x << 16 | x << 8 | x; | |
139 | } | |
140 | ||
141 | /** | |
142 | * Convert CMAP buffer (stored in extradata) to lavc palette format | |
143 | */ | |
144 | static int cmap_read_palette(AVCodecContext *avctx, uint32_t *pal) | |
145 | { | |
146 | IffContext *s = avctx->priv_data; | |
147 | int count, i; | |
148 | const uint8_t *const palette = avctx->extradata + AV_RB16(avctx->extradata); | |
149 | int palette_size = avctx->extradata_size - AV_RB16(avctx->extradata); | |
150 | ||
151 | if (avctx->bits_per_coded_sample > 8) { | |
152 | av_log(avctx, AV_LOG_ERROR, "bits_per_coded_sample > 8 not supported\n"); | |
153 | return AVERROR_INVALIDDATA; | |
154 | } | |
155 | ||
156 | count = 1 << avctx->bits_per_coded_sample; | |
157 | // If extradata is smaller than actually needed, fill the remaining with black. | |
158 | count = FFMIN(palette_size / 3, count); | |
159 | if (count) { | |
160 | for (i = 0; i < count; i++) | |
161 | pal[i] = 0xFF000000 | AV_RB24(palette + i*3); | |
162 | if (s->flags && count >= 32) { // EHB | |
163 | for (i = 0; i < 32; i++) | |
164 | pal[i + 32] = 0xFF000000 | (AV_RB24(palette + i*3) & 0xFEFEFE) >> 1; | |
165 | count = FFMAX(count, 64); | |
166 | } | |
167 | } else { // Create gray-scale color palette for bps < 8 | |
168 | count = 1 << avctx->bits_per_coded_sample; | |
169 | ||
170 | for (i = 0; i < count; i++) | |
171 | pal[i] = 0xFF000000 | gray2rgb((i * 255) >> avctx->bits_per_coded_sample); | |
172 | } | |
173 | if (s->masking == MASK_HAS_MASK) { | |
174 | memcpy(pal + (1 << avctx->bits_per_coded_sample), pal, count * 4); | |
175 | for (i = 0; i < count; i++) | |
176 | pal[i] &= 0xFFFFFF; | |
177 | } else if (s->masking == MASK_HAS_TRANSPARENT_COLOR && | |
178 | s->transparency < 1 << avctx->bits_per_coded_sample) | |
179 | pal[s->transparency] &= 0xFFFFFF; | |
180 | return 0; | |
181 | } | |
182 | ||
183 | /** | |
184 | * Extracts the IFF extra context and updates internal | |
185 | * decoder structures. | |
186 | * | |
187 | * @param avctx the AVCodecContext where to extract extra context to | |
188 | * @param avpkt the AVPacket to extract extra context from or NULL to use avctx | |
189 | * @return >= 0 in case of success, a negative error code otherwise | |
190 | */ | |
191 | static int extract_header(AVCodecContext *const avctx, | |
192 | const AVPacket *const avpkt) { | |
193 | const uint8_t *buf; | |
194 | unsigned buf_size; | |
195 | IffContext *s = avctx->priv_data; | |
196 | int i, palette_size; | |
197 | ||
198 | if (avctx->extradata_size < 2) { | |
199 | av_log(avctx, AV_LOG_ERROR, "not enough extradata\n"); | |
200 | return AVERROR_INVALIDDATA; | |
201 | } | |
202 | palette_size = avctx->extradata_size - AV_RB16(avctx->extradata); | |
203 | ||
204 | if (avpkt) { | |
205 | int image_size; | |
206 | if (avpkt->size < 2) | |
207 | return AVERROR_INVALIDDATA; | |
208 | image_size = avpkt->size - AV_RB16(avpkt->data); | |
209 | buf = avpkt->data; | |
210 | buf_size = bytestream_get_be16(&buf); | |
211 | if (buf_size <= 1 || image_size <= 1) { | |
212 | av_log(avctx, AV_LOG_ERROR, | |
213 | "Invalid image size received: %u -> image data offset: %d\n", | |
214 | buf_size, image_size); | |
215 | return AVERROR_INVALIDDATA; | |
216 | } | |
217 | } else { | |
218 | buf = avctx->extradata; | |
219 | buf_size = bytestream_get_be16(&buf); | |
220 | if (buf_size <= 1 || palette_size < 0) { | |
221 | av_log(avctx, AV_LOG_ERROR, | |
222 | "Invalid palette size received: %u -> palette data offset: %d\n", | |
223 | buf_size, palette_size); | |
224 | return AVERROR_INVALIDDATA; | |
225 | } | |
226 | } | |
227 | ||
228 | if (buf_size >= 41) { | |
229 | s->compression = bytestream_get_byte(&buf); | |
230 | s->bpp = bytestream_get_byte(&buf); | |
231 | s->ham = bytestream_get_byte(&buf); | |
232 | s->flags = bytestream_get_byte(&buf); | |
233 | s->transparency = bytestream_get_be16(&buf); | |
234 | s->masking = bytestream_get_byte(&buf); | |
235 | for (i = 0; i < 16; i++) | |
236 | s->tvdc[i] = bytestream_get_be16(&buf); | |
237 | ||
238 | if (s->masking == MASK_HAS_MASK) { | |
239 | if (s->bpp >= 8 && !s->ham) { | |
240 | avctx->pix_fmt = AV_PIX_FMT_RGB32; | |
241 | av_freep(&s->mask_buf); | |
242 | av_freep(&s->mask_palbuf); | |
243 | s->mask_buf = av_malloc((s->planesize * 32) + FF_INPUT_BUFFER_PADDING_SIZE); | |
244 | if (!s->mask_buf) | |
245 | return AVERROR(ENOMEM); | |
246 | if (s->bpp > 16) { | |
247 | av_log(avctx, AV_LOG_ERROR, "bpp %d too large for palette\n", s->bpp); | |
248 | av_freep(&s->mask_buf); | |
249 | return AVERROR(ENOMEM); | |
250 | } | |
251 | s->mask_palbuf = av_malloc((2 << s->bpp) * sizeof(uint32_t) + FF_INPUT_BUFFER_PADDING_SIZE); | |
252 | if (!s->mask_palbuf) { | |
253 | av_freep(&s->mask_buf); | |
254 | return AVERROR(ENOMEM); | |
255 | } | |
256 | } | |
257 | s->bpp++; | |
258 | } else if (s->masking != MASK_NONE && s->masking != MASK_HAS_TRANSPARENT_COLOR) { | |
259 | av_log(avctx, AV_LOG_ERROR, "Masking not supported\n"); | |
260 | return AVERROR_PATCHWELCOME; | |
261 | } | |
262 | if (!s->bpp || s->bpp > 32) { | |
263 | av_log(avctx, AV_LOG_ERROR, "Invalid number of bitplanes: %u\n", s->bpp); | |
264 | return AVERROR_INVALIDDATA; | |
265 | } else if (s->ham >= 8) { | |
266 | av_log(avctx, AV_LOG_ERROR, "Invalid number of hold bits for HAM: %u\n", s->ham); | |
267 | return AVERROR_INVALIDDATA; | |
268 | } | |
269 | ||
270 | av_freep(&s->ham_buf); | |
271 | av_freep(&s->ham_palbuf); | |
272 | ||
273 | if (s->ham) { | |
274 | int i, count = FFMIN(palette_size / 3, 1 << s->ham); | |
275 | int ham_count; | |
276 | const uint8_t *const palette = avctx->extradata + AV_RB16(avctx->extradata); | |
277 | ||
278 | s->ham_buf = av_malloc((s->planesize * 8) + FF_INPUT_BUFFER_PADDING_SIZE); | |
279 | if (!s->ham_buf) | |
280 | return AVERROR(ENOMEM); | |
281 | ||
282 | ham_count = 8 * (1 << s->ham); | |
283 | s->ham_palbuf = av_malloc((ham_count << !!(s->masking == MASK_HAS_MASK)) * sizeof (uint32_t) + FF_INPUT_BUFFER_PADDING_SIZE); | |
284 | if (!s->ham_palbuf) { | |
285 | av_freep(&s->ham_buf); | |
286 | return AVERROR(ENOMEM); | |
287 | } | |
288 | ||
289 | if (count) { // HAM with color palette attached | |
290 | // prefill with black and palette and set HAM take direct value mask to zero | |
291 | memset(s->ham_palbuf, 0, (1 << s->ham) * 2 * sizeof (uint32_t)); | |
292 | for (i=0; i < count; i++) { | |
293 | s->ham_palbuf[i*2+1] = 0xFF000000 | AV_RL24(palette + i*3); | |
294 | } | |
295 | count = 1 << s->ham; | |
296 | } else { // HAM with grayscale color palette | |
297 | count = 1 << s->ham; | |
298 | for (i=0; i < count; i++) { | |
299 | s->ham_palbuf[i*2] = 0xFF000000; // take direct color value from palette | |
300 | s->ham_palbuf[i*2+1] = 0xFF000000 | av_le2ne32(gray2rgb((i * 255) >> s->ham)); | |
301 | } | |
302 | } | |
303 | for (i=0; i < count; i++) { | |
304 | uint32_t tmp = i << (8 - s->ham); | |
305 | tmp |= tmp >> s->ham; | |
306 | s->ham_palbuf[(i+count)*2] = 0xFF00FFFF; // just modify blue color component | |
307 | s->ham_palbuf[(i+count*2)*2] = 0xFFFFFF00; // just modify red color component | |
308 | s->ham_palbuf[(i+count*3)*2] = 0xFFFF00FF; // just modify green color component | |
309 | s->ham_palbuf[(i+count)*2+1] = 0xFF000000 | tmp << 16; | |
310 | s->ham_palbuf[(i+count*2)*2+1] = 0xFF000000 | tmp; | |
311 | s->ham_palbuf[(i+count*3)*2+1] = 0xFF000000 | tmp << 8; | |
312 | } | |
313 | if (s->masking == MASK_HAS_MASK) { | |
314 | for (i = 0; i < ham_count; i++) | |
315 | s->ham_palbuf[(1 << s->bpp) + i] = s->ham_palbuf[i] | 0xFF000000; | |
316 | } | |
317 | } | |
318 | } | |
319 | ||
320 | return 0; | |
321 | } | |
322 | ||
323 | static av_cold int decode_end(AVCodecContext *avctx) | |
324 | { | |
325 | IffContext *s = avctx->priv_data; | |
326 | av_frame_free(&s->frame); | |
327 | av_freep(&s->planebuf); | |
328 | av_freep(&s->ham_buf); | |
329 | av_freep(&s->ham_palbuf); | |
330 | return 0; | |
331 | } | |
332 | ||
333 | static av_cold int decode_init(AVCodecContext *avctx) | |
334 | { | |
335 | IffContext *s = avctx->priv_data; | |
336 | int err; | |
337 | ||
338 | if (avctx->bits_per_coded_sample <= 8) { | |
339 | int palette_size; | |
340 | ||
341 | if (avctx->extradata_size >= 2) | |
342 | palette_size = avctx->extradata_size - AV_RB16(avctx->extradata); | |
343 | else | |
344 | palette_size = 0; | |
345 | avctx->pix_fmt = (avctx->bits_per_coded_sample < 8) || | |
346 | (avctx->extradata_size >= 2 && palette_size) ? AV_PIX_FMT_PAL8 : AV_PIX_FMT_GRAY8; | |
347 | } else if (avctx->bits_per_coded_sample <= 32) { | |
348 | if (avctx->codec_tag == MKTAG('R', 'G', 'B', '8')) { | |
349 | avctx->pix_fmt = AV_PIX_FMT_RGB32; | |
350 | } else if (avctx->codec_tag == MKTAG('R', 'G', 'B', 'N')) { | |
351 | avctx->pix_fmt = AV_PIX_FMT_RGB444; | |
352 | } else if (avctx->codec_tag != MKTAG('D', 'E', 'E', 'P')) { | |
353 | if (avctx->bits_per_coded_sample == 24) { | |
354 | avctx->pix_fmt = AV_PIX_FMT_0BGR32; | |
355 | } else if (avctx->bits_per_coded_sample == 32) { | |
356 | avctx->pix_fmt = AV_PIX_FMT_BGR32; | |
357 | } else { | |
358 | avpriv_request_sample(avctx, "unknown bits_per_coded_sample"); | |
359 | return AVERROR_PATCHWELCOME; | |
360 | } | |
361 | } | |
362 | } else { | |
363 | return AVERROR_INVALIDDATA; | |
364 | } | |
365 | ||
366 | if ((err = av_image_check_size(avctx->width, avctx->height, 0, avctx))) | |
367 | return err; | |
368 | s->planesize = FFALIGN(avctx->width, 16) >> 3; // Align plane size in bits to word-boundary | |
369 | s->planebuf = av_malloc(s->planesize + FF_INPUT_BUFFER_PADDING_SIZE); | |
370 | if (!s->planebuf) | |
371 | return AVERROR(ENOMEM); | |
372 | ||
373 | s->bpp = avctx->bits_per_coded_sample; | |
374 | s->frame = av_frame_alloc(); | |
375 | if (!s->frame) { | |
376 | decode_end(avctx); | |
377 | return AVERROR(ENOMEM); | |
378 | } | |
379 | ||
380 | if ((err = extract_header(avctx, NULL)) < 0) | |
381 | return err; | |
382 | ||
383 | return 0; | |
384 | } | |
385 | ||
386 | /** | |
387 | * Decode interleaved plane buffer up to 8bpp | |
388 | * @param dst Destination buffer | |
389 | * @param buf Source buffer | |
390 | * @param buf_size | |
391 | * @param plane plane number to decode as | |
392 | */ | |
393 | static void decodeplane8(uint8_t *dst, const uint8_t *buf, int buf_size, int plane) | |
394 | { | |
395 | const uint64_t *lut = plane8_lut[plane]; | |
396 | if (plane >= 8) { | |
397 | av_log(NULL, AV_LOG_WARNING, "Ignoring extra planes beyond 8\n"); | |
398 | return; | |
399 | } | |
400 | do { | |
401 | uint64_t v = AV_RN64A(dst) | lut[*buf++]; | |
402 | AV_WN64A(dst, v); | |
403 | dst += 8; | |
404 | } while (--buf_size); | |
405 | } | |
406 | ||
407 | /** | |
408 | * Decode interleaved plane buffer up to 24bpp | |
409 | * @param dst Destination buffer | |
410 | * @param buf Source buffer | |
411 | * @param buf_size | |
412 | * @param plane plane number to decode as | |
413 | */ | |
414 | static void decodeplane32(uint32_t *dst, const uint8_t *buf, int buf_size, int plane) | |
415 | { | |
416 | const uint32_t *lut = plane32_lut[plane]; | |
417 | do { | |
418 | unsigned mask = (*buf >> 2) & ~3; | |
419 | dst[0] |= lut[mask++]; | |
420 | dst[1] |= lut[mask++]; | |
421 | dst[2] |= lut[mask++]; | |
422 | dst[3] |= lut[mask]; | |
423 | mask = (*buf++ << 2) & 0x3F; | |
424 | dst[4] |= lut[mask++]; | |
425 | dst[5] |= lut[mask++]; | |
426 | dst[6] |= lut[mask++]; | |
427 | dst[7] |= lut[mask]; | |
428 | dst += 8; | |
429 | } while (--buf_size); | |
430 | } | |
431 | ||
432 | #define DECODE_HAM_PLANE32(x) \ | |
433 | first = buf[x] << 1; \ | |
434 | second = buf[(x)+1] << 1; \ | |
435 | delta &= pal[first++]; \ | |
436 | delta |= pal[first]; \ | |
437 | dst[x] = delta; \ | |
438 | delta &= pal[second++]; \ | |
439 | delta |= pal[second]; \ | |
440 | dst[(x)+1] = delta | |
441 | ||
442 | /** | |
443 | * Converts one line of HAM6/8-encoded chunky buffer to 24bpp. | |
444 | * | |
445 | * @param dst the destination 24bpp buffer | |
446 | * @param buf the source 8bpp chunky buffer | |
447 | * @param pal the HAM decode table | |
448 | * @param buf_size the plane size in bytes | |
449 | */ | |
450 | static void decode_ham_plane32(uint32_t *dst, const uint8_t *buf, | |
451 | const uint32_t *const pal, unsigned buf_size) | |
452 | { | |
453 | uint32_t delta = pal[1]; /* first palette entry */ | |
454 | do { | |
455 | uint32_t first, second; | |
456 | DECODE_HAM_PLANE32(0); | |
457 | DECODE_HAM_PLANE32(2); | |
458 | DECODE_HAM_PLANE32(4); | |
459 | DECODE_HAM_PLANE32(6); | |
460 | buf += 8; | |
461 | dst += 8; | |
462 | } while (--buf_size); | |
463 | } | |
464 | ||
465 | static void lookup_pal_indicies(uint32_t *dst, const uint32_t *buf, | |
466 | const uint32_t *const pal, unsigned width) | |
467 | { | |
468 | do { | |
469 | *dst++ = pal[*buf++]; | |
470 | } while (--width); | |
471 | } | |
472 | ||
473 | /** | |
474 | * Decode one complete byterun1 encoded line. | |
475 | * | |
476 | * @param dst the destination buffer where to store decompressed bitstream | |
477 | * @param dst_size the destination plane size in bytes | |
478 | * @param buf the source byterun1 compressed bitstream | |
479 | * @param buf_end the EOF of source byterun1 compressed bitstream | |
480 | * @return number of consumed bytes in byterun1 compressed bitstream | |
481 | */ | |
482 | static int decode_byterun(uint8_t *dst, int dst_size, | |
483 | const uint8_t *buf, const uint8_t *const buf_end) | |
484 | { | |
485 | const uint8_t *const buf_start = buf; | |
486 | unsigned x; | |
487 | for (x = 0; x < dst_size && buf < buf_end;) { | |
488 | unsigned length; | |
489 | const int8_t value = *buf++; | |
490 | if (value >= 0) { | |
491 | length = FFMIN3(value + 1, dst_size - x, buf_end - buf); | |
492 | memcpy(dst + x, buf, length); | |
493 | buf += length; | |
494 | } else if (value > -128) { | |
495 | length = FFMIN(-value + 1, dst_size - x); | |
496 | memset(dst + x, *buf++, length); | |
497 | } else { // noop | |
498 | continue; | |
499 | } | |
500 | x += length; | |
501 | } | |
502 | if (x < dst_size) { | |
503 | av_log(NULL, AV_LOG_WARNING, "decode_byterun ended before plane size\n"); | |
504 | memset(dst+x, 0, dst_size - x); | |
505 | } | |
506 | return buf - buf_start; | |
507 | } | |
508 | ||
509 | #define DECODE_RGBX_COMMON(type) \ | |
510 | if (!length) { \ | |
511 | length = bytestream2_get_byte(gb); \ | |
512 | if (!length) { \ | |
513 | length = bytestream2_get_be16(gb); \ | |
514 | if (!length) \ | |
515 | return; \ | |
516 | } \ | |
517 | } \ | |
518 | for (i = 0; i < length; i++) { \ | |
519 | *(type *)(dst + y*linesize + x * sizeof(type)) = pixel; \ | |
520 | x += 1; \ | |
521 | if (x >= width) { \ | |
522 | y += 1; \ | |
523 | if (y >= height) \ | |
524 | return; \ | |
525 | x = 0; \ | |
526 | } \ | |
527 | } | |
528 | ||
529 | /** | |
530 | * Decode RGB8 buffer | |
531 | * @param[out] dst Destination buffer | |
532 | * @param width Width of destination buffer (pixels) | |
533 | * @param height Height of destination buffer (pixels) | |
534 | * @param linesize Line size of destination buffer (bytes) | |
535 | */ | |
536 | static void decode_rgb8(GetByteContext *gb, uint8_t *dst, int width, int height, int linesize) | |
537 | { | |
538 | int x = 0, y = 0, i, length; | |
539 | while (bytestream2_get_bytes_left(gb) >= 4) { | |
540 | uint32_t pixel = 0xFF000000 | bytestream2_get_be24(gb); | |
541 | length = bytestream2_get_byte(gb) & 0x7F; | |
542 | DECODE_RGBX_COMMON(uint32_t) | |
543 | } | |
544 | } | |
545 | ||
546 | /** | |
547 | * Decode RGBN buffer | |
548 | * @param[out] dst Destination buffer | |
549 | * @param width Width of destination buffer (pixels) | |
550 | * @param height Height of destination buffer (pixels) | |
551 | * @param linesize Line size of destination buffer (bytes) | |
552 | */ | |
553 | static void decode_rgbn(GetByteContext *gb, uint8_t *dst, int width, int height, int linesize) | |
554 | { | |
555 | int x = 0, y = 0, i, length; | |
556 | while (bytestream2_get_bytes_left(gb) >= 2) { | |
557 | uint32_t pixel = bytestream2_get_be16u(gb); | |
558 | length = pixel & 0x7; | |
559 | pixel >>= 4; | |
560 | DECODE_RGBX_COMMON(uint16_t) | |
561 | } | |
562 | } | |
563 | ||
564 | /** | |
565 | * Decode DEEP RLE 32-bit buffer | |
566 | * @param[out] dst Destination buffer | |
567 | * @param[in] src Source buffer | |
568 | * @param src_size Source buffer size (bytes) | |
569 | * @param width Width of destination buffer (pixels) | |
570 | * @param height Height of destination buffer (pixels) | |
571 | * @param linesize Line size of destination buffer (bytes) | |
572 | */ | |
573 | static void decode_deep_rle32(uint8_t *dst, const uint8_t *src, int src_size, int width, int height, int linesize) | |
574 | { | |
575 | const uint8_t *src_end = src + src_size; | |
576 | int x = 0, y = 0, i; | |
577 | while (src + 5 <= src_end) { | |
578 | int opcode; | |
579 | opcode = *(int8_t *)src++; | |
580 | if (opcode >= 0) { | |
581 | int size = opcode + 1; | |
582 | for (i = 0; i < size; i++) { | |
583 | int length = FFMIN(size - i, width); | |
584 | memcpy(dst + y*linesize + x * 4, src, length * 4); | |
585 | src += length * 4; | |
586 | x += length; | |
587 | i += length; | |
588 | if (x >= width) { | |
589 | x = 0; | |
590 | y += 1; | |
591 | if (y >= height) | |
592 | return; | |
593 | } | |
594 | } | |
595 | } else { | |
596 | int size = -opcode + 1; | |
597 | uint32_t pixel = AV_RN32(src); | |
598 | for (i = 0; i < size; i++) { | |
599 | *(uint32_t *)(dst + y*linesize + x * 4) = pixel; | |
600 | x += 1; | |
601 | if (x >= width) { | |
602 | x = 0; | |
603 | y += 1; | |
604 | if (y >= height) | |
605 | return; | |
606 | } | |
607 | } | |
608 | src += 4; | |
609 | } | |
610 | } | |
611 | } | |
612 | ||
613 | /** | |
614 | * Decode DEEP TVDC 32-bit buffer | |
615 | * @param[out] dst Destination buffer | |
616 | * @param[in] src Source buffer | |
617 | * @param src_size Source buffer size (bytes) | |
618 | * @param width Width of destination buffer (pixels) | |
619 | * @param height Height of destination buffer (pixels) | |
620 | * @param linesize Line size of destination buffer (bytes) | |
621 | * @param[int] tvdc TVDC lookup table | |
622 | */ | |
623 | 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) | |
624 | { | |
625 | int x = 0, y = 0, plane = 0; | |
626 | int8_t pixel = 0; | |
627 | int i, j; | |
628 | ||
629 | for (i = 0; i < src_size * 2;) { | |
630 | #define GETNIBBLE ((i & 1) ? (src[i>>1] & 0xF) : (src[i>>1] >> 4)) | |
631 | int d = tvdc[GETNIBBLE]; | |
632 | i++; | |
633 | if (d) { | |
634 | pixel += d; | |
635 | dst[y * linesize + x*4 + plane] = pixel; | |
636 | x++; | |
637 | } else { | |
638 | if (i >= src_size * 2) | |
639 | return; | |
640 | d = GETNIBBLE + 1; | |
641 | i++; | |
642 | d = FFMIN(d, width - x); | |
643 | for (j = 0; j < d; j++) { | |
644 | dst[y * linesize + x*4 + plane] = pixel; | |
645 | x++; | |
646 | } | |
647 | } | |
648 | if (x >= width) { | |
649 | plane++; | |
650 | if (plane >= 4) { | |
651 | y++; | |
652 | if (y >= height) | |
653 | return; | |
654 | plane = 0; | |
655 | } | |
656 | x = 0; | |
657 | pixel = 0; | |
658 | i = (i + 1) & ~1; | |
659 | } | |
660 | } | |
661 | } | |
662 | ||
663 | static int unsupported(AVCodecContext *avctx) | |
664 | { | |
665 | IffContext *s = avctx->priv_data; | |
666 | avpriv_request_sample(avctx, "bitmap (compression %i, bpp %i, ham %i)", s->compression, s->bpp, s->ham); | |
667 | return AVERROR_INVALIDDATA; | |
668 | } | |
669 | ||
670 | static int decode_frame(AVCodecContext *avctx, | |
671 | void *data, int *got_frame, | |
672 | AVPacket *avpkt) | |
673 | { | |
674 | IffContext *s = avctx->priv_data; | |
675 | const uint8_t *buf = avpkt->size >= 2 ? avpkt->data + AV_RB16(avpkt->data) : NULL; | |
676 | const int buf_size = avpkt->size >= 2 ? avpkt->size - AV_RB16(avpkt->data) : 0; | |
677 | const uint8_t *buf_end = buf + buf_size; | |
678 | int y, plane, res; | |
679 | GetByteContext gb; | |
680 | const AVPixFmtDescriptor *desc; | |
681 | ||
682 | if ((res = extract_header(avctx, avpkt)) < 0) | |
683 | return res; | |
684 | if ((res = ff_reget_buffer(avctx, s->frame)) < 0) | |
685 | return res; | |
686 | ||
687 | desc = av_pix_fmt_desc_get(avctx->pix_fmt); | |
688 | ||
689 | if (!s->init && avctx->bits_per_coded_sample <= 8 && | |
690 | avctx->pix_fmt == AV_PIX_FMT_PAL8) { | |
691 | if ((res = cmap_read_palette(avctx, (uint32_t *)s->frame->data[1])) < 0) | |
692 | return res; | |
693 | } else if (!s->init && avctx->bits_per_coded_sample <= 8 && | |
694 | avctx->pix_fmt == AV_PIX_FMT_RGB32) { | |
695 | if ((res = cmap_read_palette(avctx, s->mask_palbuf)) < 0) | |
696 | return res; | |
697 | } | |
698 | s->init = 1; | |
699 | ||
700 | switch (s->compression) { | |
701 | case 0: | |
702 | if (avctx->codec_tag == MKTAG('A', 'C', 'B', 'M')) { | |
703 | if (avctx->pix_fmt == AV_PIX_FMT_PAL8 || avctx->pix_fmt == AV_PIX_FMT_GRAY8) { | |
704 | memset(s->frame->data[0], 0, avctx->height * s->frame->linesize[0]); | |
705 | for (plane = 0; plane < s->bpp; plane++) { | |
706 | for (y = 0; y < avctx->height && buf < buf_end; y++) { | |
707 | uint8_t *row = &s->frame->data[0][y * s->frame->linesize[0]]; | |
708 | decodeplane8(row, buf, FFMIN(s->planesize, buf_end - buf), plane); | |
709 | buf += s->planesize; | |
710 | } | |
711 | } | |
712 | } else if (s->ham) { // HAM to AV_PIX_FMT_BGR32 | |
713 | memset(s->frame->data[0], 0, avctx->height * s->frame->linesize[0]); | |
714 | for (y = 0; y < avctx->height; y++) { | |
715 | uint8_t *row = &s->frame->data[0][y * s->frame->linesize[0]]; | |
716 | memset(s->ham_buf, 0, s->planesize * 8); | |
717 | for (plane = 0; plane < s->bpp; plane++) { | |
718 | const uint8_t * start = buf + (plane * avctx->height + y) * s->planesize; | |
719 | if (start >= buf_end) | |
720 | break; | |
721 | decodeplane8(s->ham_buf, start, FFMIN(s->planesize, buf_end - start), plane); | |
722 | } | |
723 | decode_ham_plane32((uint32_t *)row, s->ham_buf, s->ham_palbuf, s->planesize); | |
724 | } | |
725 | } else | |
726 | return unsupported(avctx); | |
727 | } else if (avctx->codec_tag == MKTAG('D', 'E', 'E', 'P')) { | |
728 | int raw_width = avctx->width * (av_get_bits_per_pixel(desc) >> 3); | |
729 | int x; | |
730 | for (y = 0; y < avctx->height && buf < buf_end; y++) { | |
731 | uint8_t *row = &s->frame->data[0][y * s->frame->linesize[0]]; | |
732 | memcpy(row, buf, FFMIN(raw_width, buf_end - buf)); | |
733 | buf += raw_width; | |
734 | if (avctx->pix_fmt == AV_PIX_FMT_BGR32) { | |
735 | for (x = 0; x < avctx->width; x++) | |
736 | row[4 * x + 3] = row[4 * x + 3] & 0xF0 | (row[4 * x + 3] >> 4); | |
737 | } | |
738 | } | |
739 | } else if (avctx->codec_tag == MKTAG('I', 'L', 'B', 'M')) { // interleaved | |
740 | if (avctx->pix_fmt == AV_PIX_FMT_PAL8 || avctx->pix_fmt == AV_PIX_FMT_GRAY8) { | |
741 | for (y = 0; y < avctx->height; y++) { | |
742 | uint8_t *row = &s->frame->data[0][y * s->frame->linesize[0]]; | |
743 | memset(row, 0, avctx->width); | |
744 | for (plane = 0; plane < s->bpp && buf < buf_end; plane++) { | |
745 | decodeplane8(row, buf, FFMIN(s->planesize, buf_end - buf), plane); | |
746 | buf += s->planesize; | |
747 | } | |
748 | } | |
749 | } else if (s->ham) { // HAM to AV_PIX_FMT_BGR32 | |
750 | for (y = 0; y < avctx->height; y++) { | |
751 | uint8_t *row = &s->frame->data[0][y * s->frame->linesize[0]]; | |
752 | memset(s->ham_buf, 0, s->planesize * 8); | |
753 | for (plane = 0; plane < s->bpp && buf < buf_end; plane++) { | |
754 | decodeplane8(s->ham_buf, buf, FFMIN(s->planesize, buf_end - buf), plane); | |
755 | buf += s->planesize; | |
756 | } | |
757 | decode_ham_plane32((uint32_t *)row, s->ham_buf, s->ham_palbuf, s->planesize); | |
758 | } | |
759 | } else { // AV_PIX_FMT_BGR32 | |
760 | for (y = 0; y < avctx->height; y++) { | |
761 | uint8_t *row = &s->frame->data[0][y * s->frame->linesize[0]]; | |
762 | memset(row, 0, avctx->width << 2); | |
763 | for (plane = 0; plane < s->bpp && buf < buf_end; plane++) { | |
764 | decodeplane32((uint32_t *)row, buf, | |
765 | FFMIN(s->planesize, buf_end - buf), plane); | |
766 | buf += s->planesize; | |
767 | } | |
768 | } | |
769 | } | |
770 | } else if (avctx->codec_tag == MKTAG('P', 'B', 'M', ' ')) { // IFF-PBM | |
771 | if (avctx->pix_fmt == AV_PIX_FMT_PAL8 || avctx->pix_fmt == AV_PIX_FMT_GRAY8) { | |
772 | for (y = 0; y < avctx->height && buf_end > buf; y++) { | |
773 | uint8_t *row = &s->frame->data[0][y * s->frame->linesize[0]]; | |
774 | memcpy(row, buf, FFMIN(avctx->width, buf_end - buf)); | |
775 | buf += avctx->width + (avctx->width % 2); // padding if odd | |
776 | } | |
777 | } else if (s->ham) { // IFF-PBM: HAM to AV_PIX_FMT_BGR32 | |
778 | for (y = 0; y < avctx->height && buf_end > buf; y++) { | |
779 | uint8_t *row = &s->frame->data[0][y * s->frame->linesize[0]]; | |
780 | memcpy(s->ham_buf, buf, FFMIN(avctx->width, buf_end - buf)); | |
781 | buf += avctx->width + (avctx->width & 1); // padding if odd | |
782 | decode_ham_plane32((uint32_t *)row, s->ham_buf, s->ham_palbuf, s->planesize); | |
783 | } | |
784 | } else | |
785 | return unsupported(avctx); | |
786 | } | |
787 | break; | |
788 | case 1: | |
789 | if (avctx->codec_tag == MKTAG('I', 'L', 'B', 'M')) { // interleaved | |
790 | if (avctx->pix_fmt == AV_PIX_FMT_PAL8 || avctx->pix_fmt == AV_PIX_FMT_GRAY8) { | |
791 | for (y = 0; y < avctx->height; y++) { | |
792 | uint8_t *row = &s->frame->data[0][y * s->frame->linesize[0]]; | |
793 | memset(row, 0, avctx->width); | |
794 | for (plane = 0; plane < s->bpp; plane++) { | |
795 | buf += decode_byterun(s->planebuf, s->planesize, buf, buf_end); | |
796 | decodeplane8(row, s->planebuf, s->planesize, plane); | |
797 | } | |
798 | } | |
799 | } else if (avctx->bits_per_coded_sample <= 8) { //8-bit (+ mask) to AV_PIX_FMT_BGR32 | |
800 | for (y = 0; y < avctx->height; y++) { | |
801 | uint8_t *row = &s->frame->data[0][y * s->frame->linesize[0]]; | |
802 | memset(s->mask_buf, 0, avctx->width * sizeof(uint32_t)); | |
803 | for (plane = 0; plane < s->bpp; plane++) { | |
804 | buf += decode_byterun(s->planebuf, s->planesize, buf, buf_end); | |
805 | decodeplane32(s->mask_buf, s->planebuf, s->planesize, plane); | |
806 | } | |
807 | lookup_pal_indicies((uint32_t *)row, s->mask_buf, s->mask_palbuf, avctx->width); | |
808 | } | |
809 | } else if (s->ham) { // HAM to AV_PIX_FMT_BGR32 | |
810 | for (y = 0; y < avctx->height; y++) { | |
811 | uint8_t *row = &s->frame->data[0][y * s->frame->linesize[0]]; | |
812 | memset(s->ham_buf, 0, s->planesize * 8); | |
813 | for (plane = 0; plane < s->bpp; plane++) { | |
814 | buf += decode_byterun(s->planebuf, s->planesize, buf, buf_end); | |
815 | decodeplane8(s->ham_buf, s->planebuf, s->planesize, plane); | |
816 | } | |
817 | decode_ham_plane32((uint32_t *)row, s->ham_buf, s->ham_palbuf, s->planesize); | |
818 | } | |
819 | } else { // AV_PIX_FMT_BGR32 | |
820 | for (y = 0; y < avctx->height; y++) { | |
821 | uint8_t *row = &s->frame->data[0][y * s->frame->linesize[0]]; | |
822 | memset(row, 0, avctx->width << 2); | |
823 | for (plane = 0; plane < s->bpp; plane++) { | |
824 | buf += decode_byterun(s->planebuf, s->planesize, buf, buf_end); | |
825 | decodeplane32((uint32_t *)row, s->planebuf, s->planesize, plane); | |
826 | } | |
827 | } | |
828 | } | |
829 | } else if (avctx->codec_tag == MKTAG('P', 'B', 'M', ' ')) { // IFF-PBM | |
830 | if (avctx->pix_fmt == AV_PIX_FMT_PAL8 || avctx->pix_fmt == AV_PIX_FMT_GRAY8) { | |
831 | for (y = 0; y < avctx->height; y++) { | |
832 | uint8_t *row = &s->frame->data[0][y * s->frame->linesize[0]]; | |
833 | buf += decode_byterun(row, avctx->width, buf, buf_end); | |
834 | } | |
835 | } else if (s->ham) { // IFF-PBM: HAM to AV_PIX_FMT_BGR32 | |
836 | for (y = 0; y < avctx->height; y++) { | |
837 | uint8_t *row = &s->frame->data[0][y * s->frame->linesize[0]]; | |
838 | buf += decode_byterun(s->ham_buf, avctx->width, buf, buf_end); | |
839 | decode_ham_plane32((uint32_t *)row, s->ham_buf, s->ham_palbuf, s->planesize); | |
840 | } | |
841 | } else | |
842 | return unsupported(avctx); | |
843 | } else if (avctx->codec_tag == MKTAG('D', 'E', 'E', 'P')) { // IFF-DEEP | |
844 | if (av_get_bits_per_pixel(desc) == 32) | |
845 | decode_deep_rle32(s->frame->data[0], buf, buf_size, avctx->width, avctx->height, s->frame->linesize[0]); | |
846 | else | |
847 | return unsupported(avctx); | |
848 | } | |
849 | break; | |
850 | case 4: | |
851 | bytestream2_init(&gb, buf, buf_size); | |
852 | if (avctx->codec_tag == MKTAG('R', 'G', 'B', '8') && avctx->pix_fmt == AV_PIX_FMT_RGB32) | |
853 | decode_rgb8(&gb, s->frame->data[0], avctx->width, avctx->height, s->frame->linesize[0]); | |
854 | else if (avctx->codec_tag == MKTAG('R', 'G', 'B', 'N') && avctx->pix_fmt == AV_PIX_FMT_RGB444) | |
855 | decode_rgbn(&gb, s->frame->data[0], avctx->width, avctx->height, s->frame->linesize[0]); | |
856 | else | |
857 | return unsupported(avctx); | |
858 | break; | |
859 | case 5: | |
860 | if (avctx->codec_tag == MKTAG('D', 'E', 'E', 'P')) { | |
861 | if (av_get_bits_per_pixel(desc) == 32) | |
862 | decode_deep_tvdc32(s->frame->data[0], buf, buf_size, avctx->width, avctx->height, s->frame->linesize[0], s->tvdc); | |
863 | else | |
864 | return unsupported(avctx); | |
865 | } else | |
866 | return unsupported(avctx); | |
867 | break; | |
868 | default: | |
869 | return unsupported(avctx); | |
870 | } | |
871 | ||
872 | if ((res = av_frame_ref(data, s->frame)) < 0) | |
873 | return res; | |
874 | ||
875 | *got_frame = 1; | |
876 | ||
877 | return buf_size; | |
878 | } | |
879 | ||
880 | #if CONFIG_IFF_ILBM_DECODER | |
881 | AVCodec ff_iff_ilbm_decoder = { | |
882 | .name = "iff", | |
883 | .long_name = NULL_IF_CONFIG_SMALL("IFF"), | |
884 | .type = AVMEDIA_TYPE_VIDEO, | |
885 | .id = AV_CODEC_ID_IFF_ILBM, | |
886 | .priv_data_size = sizeof(IffContext), | |
887 | .init = decode_init, | |
888 | .close = decode_end, | |
889 | .decode = decode_frame, | |
890 | .capabilities = CODEC_CAP_DR1, | |
891 | }; | |
892 | #endif | |
893 | #if CONFIG_IFF_BYTERUN1_DECODER | |
894 | AVCodec ff_iff_byterun1_decoder = { | |
895 | .name = "iff", | |
896 | .long_name = NULL_IF_CONFIG_SMALL("IFF"), | |
897 | .type = AVMEDIA_TYPE_VIDEO, | |
898 | .id = AV_CODEC_ID_IFF_BYTERUN1, | |
899 | .priv_data_size = sizeof(IffContext), | |
900 | .init = decode_init, | |
901 | .close = decode_end, | |
902 | .decode = decode_frame, | |
903 | .capabilities = CODEC_CAP_DR1, | |
904 | }; | |
905 | #endif |