1 /*
2 * huffyuv decoder
3 *
4 * Copyright (c) 2002-2014 Michael Niedermayer <michaelni@gmx.at>
5 *
6 * see http://www.pcisys.net/~melanson/codecs/huffyuv.txt for a description of
7 * the algorithm used
8 *
9 * This file is part of FFmpeg.
10 *
11 * FFmpeg is free software; you can redistribute it and/or
12 * modify it under the terms of the GNU Lesser General Public
13 * License as published by the Free Software Foundation; either
14 * version 2.1 of the License, or (at your option) any later version.
15 *
16 * FFmpeg is distributed in the hope that it will be useful,
17 * but WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
19 * Lesser General Public License for more details.
20 *
21 * You should have received a copy of the GNU Lesser General Public
22 * License along with FFmpeg; if not, write to the Free Software
23 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
24 *
25 * yuva, gray, 4:4:4, 4:1:1, 4:1:0 and >8 bit per sample support sponsored by NOA
26 */
27
28 /**
29 * @file
30 * huffyuv decoder
31 */
32
33 #define UNCHECKED_BITSTREAM_READER 1
34
35 #include "avcodec.h"
36 #include "get_bits.h"
37 #include "huffyuv.h"
38 #include "huffyuvdsp.h"
39 #include "lossless_videodsp.h"
40 #include "thread.h"
41 #include "libavutil/imgutils.h"
42 #include "libavutil/pixdesc.h"
43
44 #define classic_shift_luma_table_size 42
45 static const unsigned char classic_shift_luma[classic_shift_luma_table_size + AV_INPUT_BUFFER_PADDING_SIZE] = {
46 34, 36, 35, 69, 135, 232, 9, 16, 10, 24, 11, 23, 12, 16, 13, 10,
47 14, 8, 15, 8, 16, 8, 17, 20, 16, 10, 207, 206, 205, 236, 11, 8,
48 10, 21, 9, 23, 8, 8, 199, 70, 69, 68, 0,
49 0,0,0,0,0,0,0,0,
50 };
51
52 #define classic_shift_chroma_table_size 59
53 static const unsigned char classic_shift_chroma[classic_shift_chroma_table_size + AV_INPUT_BUFFER_PADDING_SIZE] = {
54 66, 36, 37, 38, 39, 40, 41, 75, 76, 77, 110, 239, 144, 81, 82, 83,
55 84, 85, 118, 183, 56, 57, 88, 89, 56, 89, 154, 57, 58, 57, 26, 141,
56 57, 56, 58, 57, 58, 57, 184, 119, 214, 245, 116, 83, 82, 49, 80, 79,
57 78, 77, 44, 75, 41, 40, 39, 38, 37, 36, 34, 0,
58 0,0,0,0,0,0,0,0,
59 };
60
61 static const unsigned char classic_add_luma[256] = {
62 3, 9, 5, 12, 10, 35, 32, 29, 27, 50, 48, 45, 44, 41, 39, 37,
63 73, 70, 68, 65, 64, 61, 58, 56, 53, 50, 49, 46, 44, 41, 38, 36,
64 68, 65, 63, 61, 58, 55, 53, 51, 48, 46, 45, 43, 41, 39, 38, 36,
65 35, 33, 32, 30, 29, 27, 26, 25, 48, 47, 46, 44, 43, 41, 40, 39,
66 37, 36, 35, 34, 32, 31, 30, 28, 27, 26, 24, 23, 22, 20, 19, 37,
67 35, 34, 33, 31, 30, 29, 27, 26, 24, 23, 21, 20, 18, 17, 15, 29,
68 27, 26, 24, 22, 21, 19, 17, 16, 14, 26, 25, 23, 21, 19, 18, 16,
69 15, 27, 25, 23, 21, 19, 17, 16, 14, 26, 25, 23, 21, 18, 17, 14,
70 12, 17, 19, 13, 4, 9, 2, 11, 1, 7, 8, 0, 16, 3, 14, 6,
71 12, 10, 5, 15, 18, 11, 10, 13, 15, 16, 19, 20, 22, 24, 27, 15,
72 18, 20, 22, 24, 26, 14, 17, 20, 22, 24, 27, 15, 18, 20, 23, 25,
73 28, 16, 19, 22, 25, 28, 32, 36, 21, 25, 29, 33, 38, 42, 45, 49,
74 28, 31, 34, 37, 40, 42, 44, 47, 49, 50, 52, 54, 56, 57, 59, 60,
75 62, 64, 66, 67, 69, 35, 37, 39, 40, 42, 43, 45, 47, 48, 51, 52,
76 54, 55, 57, 59, 60, 62, 63, 66, 67, 69, 71, 72, 38, 40, 42, 43,
77 46, 47, 49, 51, 26, 28, 30, 31, 33, 34, 18, 19, 11, 13, 7, 8,
78 };
79
80 static const unsigned char classic_add_chroma[256] = {
81 3, 1, 2, 2, 2, 2, 3, 3, 7, 5, 7, 5, 8, 6, 11, 9,
82 7, 13, 11, 10, 9, 8, 7, 5, 9, 7, 6, 4, 7, 5, 8, 7,
83 11, 8, 13, 11, 19, 15, 22, 23, 20, 33, 32, 28, 27, 29, 51, 77,
84 43, 45, 76, 81, 46, 82, 75, 55, 56, 144, 58, 80, 60, 74, 147, 63,
85 143, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79,
86 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 27, 30, 21, 22,
87 17, 14, 5, 6, 100, 54, 47, 50, 51, 53, 106, 107, 108, 109, 110, 111,
88 112, 113, 114, 115, 4, 117, 118, 92, 94, 121, 122, 3, 124, 103, 2, 1,
89 0, 129, 130, 131, 120, 119, 126, 125, 136, 137, 138, 139, 140, 141, 142, 134,
90 135, 132, 133, 104, 64, 101, 62, 57, 102, 95, 93, 59, 61, 28, 97, 96,
91 52, 49, 48, 29, 32, 25, 24, 46, 23, 98, 45, 44, 43, 20, 42, 41,
92 19, 18, 99, 40, 15, 39, 38, 16, 13, 12, 11, 37, 10, 9, 8, 36,
93 7, 128, 127, 105, 123, 116, 35, 34, 33, 145, 31, 79, 42, 146, 78, 26,
94 83, 48, 49, 50, 44, 47, 26, 31, 30, 18, 17, 19, 21, 24, 25, 13,
95 14, 16, 17, 18, 20, 21, 12, 14, 15, 9, 10, 6, 9, 6, 5, 8,
96 6, 12, 8, 10, 7, 9, 6, 4, 6, 2, 2, 3, 3, 3, 3, 2,
97 };
98
read_len_table(uint8_t * dst,GetBitContext * gb,int n)99 static int read_len_table(uint8_t *dst, GetBitContext *gb, int n)
100 {
101 int i, val, repeat;
102
103 for (i = 0; i < n;) {
104 repeat = get_bits(gb, 3);
105 val = get_bits(gb, 5);
106 if (repeat == 0)
107 repeat = get_bits(gb, 8);
108 if (i + repeat > n || get_bits_left(gb) < 0) {
109 av_log(NULL, AV_LOG_ERROR, "Error reading huffman table\n");
110 return AVERROR_INVALIDDATA;
111 }
112 while (repeat--)
113 dst[i++] = val;
114 }
115 return 0;
116 }
117
generate_joint_tables(HYuvContext * s)118 static int generate_joint_tables(HYuvContext *s)
119 {
120 int ret;
121 uint16_t *symbols = av_mallocz(5 << VLC_BITS);
122 uint16_t *bits;
123 uint8_t *len;
124 if (!symbols)
125 return AVERROR(ENOMEM);
126 bits = symbols + (1 << VLC_BITS);
127 len = (uint8_t *)(bits + (1 << VLC_BITS));
128
129 if (s->bitstream_bpp < 24 || s->version > 2) {
130 int p, i, y, u;
131 for (p = 0; p < 4; p++) {
132 int p0 = s->version > 2 ? p : 0;
133 for (i = y = 0; y < s->vlc_n; y++) {
134 int len0 = s->len[p0][y];
135 int limit = VLC_BITS - len0;
136 if (limit <= 0 || !len0)
137 continue;
138 if ((sign_extend(y, 8) & (s->vlc_n-1)) != y)
139 continue;
140 for (u = 0; u < s->vlc_n; u++) {
141 int len1 = s->len[p][u];
142 if (len1 > limit || !len1)
143 continue;
144 if ((sign_extend(u, 8) & (s->vlc_n-1)) != u)
145 continue;
146 av_assert0(i < (1 << VLC_BITS));
147 len[i] = len0 + len1;
148 bits[i] = (s->bits[p0][y] << len1) + s->bits[p][u];
149 symbols[i] = (y << 8) + (u & 0xFF);
150 i++;
151 }
152 }
153 ff_free_vlc(&s->vlc[4 + p]);
154 if ((ret = ff_init_vlc_sparse(&s->vlc[4 + p], VLC_BITS, i, len, 1, 1,
155 bits, 2, 2, symbols, 2, 2, 0)) < 0)
156 goto out;
157 }
158 } else {
159 uint8_t (*map)[4] = (uint8_t(*)[4]) s->pix_bgr_map;
160 int i, b, g, r, code;
161 int p0 = s->decorrelate;
162 int p1 = !s->decorrelate;
163 /* Restrict the range to +/-16 because that's pretty much guaranteed
164 * to cover all the combinations that fit in 11 bits total, and it
165 * does not matter if we miss a few rare codes. */
166 for (i = 0, g = -16; g < 16; g++) {
167 int len0 = s->len[p0][g & 255];
168 int limit0 = VLC_BITS - len0;
169 if (limit0 < 2 || !len0)
170 continue;
171 for (b = -16; b < 16; b++) {
172 int len1 = s->len[p1][b & 255];
173 int limit1 = limit0 - len1;
174 if (limit1 < 1 || !len1)
175 continue;
176 code = (s->bits[p0][g & 255] << len1) + s->bits[p1][b & 255];
177 for (r = -16; r < 16; r++) {
178 int len2 = s->len[2][r & 255];
179 if (len2 > limit1 || !len2)
180 continue;
181 av_assert0(i < (1 << VLC_BITS));
182 len[i] = len0 + len1 + len2;
183 bits[i] = (code << len2) + s->bits[2][r & 255];
184 if (s->decorrelate) {
185 map[i][G] = g;
186 map[i][B] = g + b;
187 map[i][R] = g + r;
188 } else {
189 map[i][B] = g;
190 map[i][G] = b;
191 map[i][R] = r;
192 }
193 i++;
194 }
195 }
196 }
197 ff_free_vlc(&s->vlc[4]);
198 if ((ret = init_vlc(&s->vlc[4], VLC_BITS, i, len, 1, 1,
199 bits, 2, 2, 0)) < 0)
200 goto out;
201 }
202 ret = 0;
203 out:
204 av_freep(&symbols);
205 return ret;
206 }
207
read_huffman_tables(HYuvContext * s,const uint8_t * src,int length)208 static int read_huffman_tables(HYuvContext *s, const uint8_t *src, int length)
209 {
210 GetBitContext gb;
211 int i, ret;
212 int count = 3;
213
214 if ((ret = init_get_bits(&gb, src, length * 8)) < 0)
215 return ret;
216
217 if (s->version > 2)
218 count = 1 + s->alpha + 2*s->chroma;
219
220 for (i = 0; i < count; i++) {
221 if ((ret = read_len_table(s->len[i], &gb, s->vlc_n)) < 0)
222 return ret;
223 if ((ret = ff_huffyuv_generate_bits_table(s->bits[i], s->len[i], s->vlc_n)) < 0)
224 return ret;
225 ff_free_vlc(&s->vlc[i]);
226 if ((ret = init_vlc(&s->vlc[i], VLC_BITS, s->vlc_n, s->len[i], 1, 1,
227 s->bits[i], 4, 4, 0)) < 0)
228 return ret;
229 }
230
231 if ((ret = generate_joint_tables(s)) < 0)
232 return ret;
233
234 return (get_bits_count(&gb) + 7) / 8;
235 }
236
read_old_huffman_tables(HYuvContext * s)237 static int read_old_huffman_tables(HYuvContext *s)
238 {
239 GetBitContext gb;
240 int i, ret;
241
242 init_get_bits(&gb, classic_shift_luma,
243 classic_shift_luma_table_size * 8);
244 if ((ret = read_len_table(s->len[0], &gb, 256)) < 0)
245 return ret;
246
247 init_get_bits(&gb, classic_shift_chroma,
248 classic_shift_chroma_table_size * 8);
249 if ((ret = read_len_table(s->len[1], &gb, 256)) < 0)
250 return ret;
251
252 for (i = 0; i < 256; i++)
253 s->bits[0][i] = classic_add_luma[i];
254 for (i = 0; i < 256; i++)
255 s->bits[1][i] = classic_add_chroma[i];
256
257 if (s->bitstream_bpp >= 24) {
258 memcpy(s->bits[1], s->bits[0], 256 * sizeof(uint32_t));
259 memcpy(s->len[1], s->len[0], 256 * sizeof(uint8_t));
260 }
261 memcpy(s->bits[2], s->bits[1], 256 * sizeof(uint32_t));
262 memcpy(s->len[2], s->len[1], 256 * sizeof(uint8_t));
263
264 for (i = 0; i < 4; i++) {
265 ff_free_vlc(&s->vlc[i]);
266 if ((ret = init_vlc(&s->vlc[i], VLC_BITS, 256, s->len[i], 1, 1,
267 s->bits[i], 4, 4, 0)) < 0)
268 return ret;
269 }
270
271 if ((ret = generate_joint_tables(s)) < 0)
272 return ret;
273
274 return 0;
275 }
276
decode_end(AVCodecContext * avctx)277 static av_cold int decode_end(AVCodecContext *avctx)
278 {
279 HYuvContext *s = avctx->priv_data;
280 int i;
281
282 ff_huffyuv_common_end(s);
283 av_freep(&s->bitstream_buffer);
284
285 for (i = 0; i < 8; i++)
286 ff_free_vlc(&s->vlc[i]);
287
288 return 0;
289 }
290
decode_init(AVCodecContext * avctx)291 static av_cold int decode_init(AVCodecContext *avctx)
292 {
293 HYuvContext *s = avctx->priv_data;
294 int ret;
295
296 ret = av_image_check_size(avctx->width, avctx->height, 0, avctx);
297 if (ret < 0)
298 return ret;
299
300 ff_huffyuvdsp_init(&s->hdsp, avctx->pix_fmt);
301 ff_llviddsp_init(&s->llviddsp);
302 memset(s->vlc, 0, 4 * sizeof(VLC));
303
304 s->interlaced = avctx->height > 288;
305 s->bgr32 = 1;
306
307 if (avctx->extradata_size) {
308 if ((avctx->bits_per_coded_sample & 7) &&
309 avctx->bits_per_coded_sample != 12)
310 s->version = 1; // do such files exist at all?
311 else if (avctx->extradata_size > 3 && avctx->extradata[3] == 0)
312 s->version = 2;
313 else
314 s->version = 3;
315 } else
316 s->version = 0;
317
318 s->bps = 8;
319 s->n = 1<<s->bps;
320 s->vlc_n = FFMIN(s->n, MAX_VLC_N);
321 s->chroma = 1;
322 if (s->version >= 2) {
323 int method, interlace;
324
325 if (avctx->extradata_size < 4)
326 return AVERROR_INVALIDDATA;
327
328 method = avctx->extradata[0];
329 s->decorrelate = method & 64 ? 1 : 0;
330 s->predictor = method & 63;
331 if (s->version == 2) {
332 s->bitstream_bpp = avctx->extradata[1];
333 if (s->bitstream_bpp == 0)
334 s->bitstream_bpp = avctx->bits_per_coded_sample & ~7;
335 } else {
336 s->bps = (avctx->extradata[1] >> 4) + 1;
337 s->n = 1<<s->bps;
338 s->vlc_n = FFMIN(s->n, MAX_VLC_N);
339 s->chroma_h_shift = avctx->extradata[1] & 3;
340 s->chroma_v_shift = (avctx->extradata[1] >> 2) & 3;
341 s->yuv = !!(avctx->extradata[2] & 1);
342 s->chroma= !!(avctx->extradata[2] & 3);
343 s->alpha = !!(avctx->extradata[2] & 4);
344 }
345 interlace = (avctx->extradata[2] & 0x30) >> 4;
346 s->interlaced = (interlace == 1) ? 1 : (interlace == 2) ? 0 : s->interlaced;
347 s->context = avctx->extradata[2] & 0x40 ? 1 : 0;
348
349 if ((ret = read_huffman_tables(s, avctx->extradata + 4,
350 avctx->extradata_size - 4)) < 0)
351 goto error;
352 } else {
353 switch (avctx->bits_per_coded_sample & 7) {
354 case 1:
355 s->predictor = LEFT;
356 s->decorrelate = 0;
357 break;
358 case 2:
359 s->predictor = LEFT;
360 s->decorrelate = 1;
361 break;
362 case 3:
363 s->predictor = PLANE;
364 s->decorrelate = avctx->bits_per_coded_sample >= 24;
365 break;
366 case 4:
367 s->predictor = MEDIAN;
368 s->decorrelate = 0;
369 break;
370 default:
371 s->predictor = LEFT; // OLD
372 s->decorrelate = 0;
373 break;
374 }
375 s->bitstream_bpp = avctx->bits_per_coded_sample & ~7;
376 s->context = 0;
377
378 if ((ret = read_old_huffman_tables(s)) < 0)
379 goto error;
380 }
381
382 if (s->version <= 2) {
383 switch (s->bitstream_bpp) {
384 case 12:
385 avctx->pix_fmt = AV_PIX_FMT_YUV420P;
386 s->yuv = 1;
387 break;
388 case 16:
389 if (s->yuy2)
390 avctx->pix_fmt = AV_PIX_FMT_YUYV422;
391 else
392 avctx->pix_fmt = AV_PIX_FMT_YUV422P;
393 s->yuv = 1;
394 break;
395 case 24:
396 if (s->bgr32)
397 avctx->pix_fmt = AV_PIX_FMT_0RGB32;
398 else
399 avctx->pix_fmt = AV_PIX_FMT_BGR24;
400 break;
401 case 32:
402 av_assert0(s->bgr32);
403 avctx->pix_fmt = AV_PIX_FMT_RGB32;
404 s->alpha = 1;
405 break;
406 default:
407 ret = AVERROR_INVALIDDATA;
408 goto error;
409 }
410 av_pix_fmt_get_chroma_sub_sample(avctx->pix_fmt,
411 &s->chroma_h_shift,
412 &s->chroma_v_shift);
413 } else {
414 switch ( (s->chroma<<10) | (s->yuv<<9) | (s->alpha<<8) | ((s->bps-1)<<4) | s->chroma_h_shift | (s->chroma_v_shift<<2)) {
415 case 0x070:
416 avctx->pix_fmt = AV_PIX_FMT_GRAY8;
417 break;
418 case 0x0F0:
419 avctx->pix_fmt = AV_PIX_FMT_GRAY16;
420 break;
421 case 0x470:
422 avctx->pix_fmt = AV_PIX_FMT_GBRP;
423 break;
424 case 0x480:
425 avctx->pix_fmt = AV_PIX_FMT_GBRP9;
426 break;
427 case 0x490:
428 avctx->pix_fmt = AV_PIX_FMT_GBRP10;
429 break;
430 case 0x4B0:
431 avctx->pix_fmt = AV_PIX_FMT_GBRP12;
432 break;
433 case 0x4D0:
434 avctx->pix_fmt = AV_PIX_FMT_GBRP14;
435 break;
436 case 0x4F0:
437 avctx->pix_fmt = AV_PIX_FMT_GBRP16;
438 break;
439 case 0x570:
440 avctx->pix_fmt = AV_PIX_FMT_GBRAP;
441 break;
442 case 0x670:
443 avctx->pix_fmt = AV_PIX_FMT_YUV444P;
444 break;
445 case 0x680:
446 avctx->pix_fmt = AV_PIX_FMT_YUV444P9;
447 break;
448 case 0x690:
449 avctx->pix_fmt = AV_PIX_FMT_YUV444P10;
450 break;
451 case 0x6B0:
452 avctx->pix_fmt = AV_PIX_FMT_YUV444P12;
453 break;
454 case 0x6D0:
455 avctx->pix_fmt = AV_PIX_FMT_YUV444P14;
456 break;
457 case 0x6F0:
458 avctx->pix_fmt = AV_PIX_FMT_YUV444P16;
459 break;
460 case 0x671:
461 avctx->pix_fmt = AV_PIX_FMT_YUV422P;
462 break;
463 case 0x681:
464 avctx->pix_fmt = AV_PIX_FMT_YUV422P9;
465 break;
466 case 0x691:
467 avctx->pix_fmt = AV_PIX_FMT_YUV422P10;
468 break;
469 case 0x6B1:
470 avctx->pix_fmt = AV_PIX_FMT_YUV422P12;
471 break;
472 case 0x6D1:
473 avctx->pix_fmt = AV_PIX_FMT_YUV422P14;
474 break;
475 case 0x6F1:
476 avctx->pix_fmt = AV_PIX_FMT_YUV422P16;
477 break;
478 case 0x672:
479 avctx->pix_fmt = AV_PIX_FMT_YUV411P;
480 break;
481 case 0x674:
482 avctx->pix_fmt = AV_PIX_FMT_YUV440P;
483 break;
484 case 0x675:
485 avctx->pix_fmt = AV_PIX_FMT_YUV420P;
486 break;
487 case 0x685:
488 avctx->pix_fmt = AV_PIX_FMT_YUV420P9;
489 break;
490 case 0x695:
491 avctx->pix_fmt = AV_PIX_FMT_YUV420P10;
492 break;
493 case 0x6B5:
494 avctx->pix_fmt = AV_PIX_FMT_YUV420P12;
495 break;
496 case 0x6D5:
497 avctx->pix_fmt = AV_PIX_FMT_YUV420P14;
498 break;
499 case 0x6F5:
500 avctx->pix_fmt = AV_PIX_FMT_YUV420P16;
501 break;
502 case 0x67A:
503 avctx->pix_fmt = AV_PIX_FMT_YUV410P;
504 break;
505 case 0x770:
506 avctx->pix_fmt = AV_PIX_FMT_YUVA444P;
507 break;
508 case 0x780:
509 avctx->pix_fmt = AV_PIX_FMT_YUVA444P9;
510 break;
511 case 0x790:
512 avctx->pix_fmt = AV_PIX_FMT_YUVA444P10;
513 break;
514 case 0x7F0:
515 avctx->pix_fmt = AV_PIX_FMT_YUVA444P16;
516 break;
517 case 0x771:
518 avctx->pix_fmt = AV_PIX_FMT_YUVA422P;
519 break;
520 case 0x781:
521 avctx->pix_fmt = AV_PIX_FMT_YUVA422P9;
522 break;
523 case 0x791:
524 avctx->pix_fmt = AV_PIX_FMT_YUVA422P10;
525 break;
526 case 0x7F1:
527 avctx->pix_fmt = AV_PIX_FMT_YUVA422P16;
528 break;
529 case 0x775:
530 avctx->pix_fmt = AV_PIX_FMT_YUVA420P;
531 break;
532 case 0x785:
533 avctx->pix_fmt = AV_PIX_FMT_YUVA420P9;
534 break;
535 case 0x795:
536 avctx->pix_fmt = AV_PIX_FMT_YUVA420P10;
537 break;
538 case 0x7F5:
539 avctx->pix_fmt = AV_PIX_FMT_YUVA420P16;
540 break;
541 default:
542 ret = AVERROR_INVALIDDATA;
543 goto error;
544 }
545 }
546
547 ff_huffyuv_common_init(avctx);
548
549 if ((avctx->pix_fmt == AV_PIX_FMT_YUV422P || avctx->pix_fmt == AV_PIX_FMT_YUV420P) && avctx->width & 1) {
550 av_log(avctx, AV_LOG_ERROR, "width must be even for this colorspace\n");
551 ret = AVERROR_INVALIDDATA;
552 goto error;
553 }
554 if (s->predictor == MEDIAN && avctx->pix_fmt == AV_PIX_FMT_YUV422P &&
555 avctx->width % 4) {
556 av_log(avctx, AV_LOG_ERROR, "width must be a multiple of 4 "
557 "for this combination of colorspace and predictor type.\n");
558 ret = AVERROR_INVALIDDATA;
559 goto error;
560 }
561
562 if ((ret = ff_huffyuv_alloc_temp(s)) < 0) {
563 ff_huffyuv_common_end(s);
564 goto error;
565 }
566
567 return 0;
568 error:
569 decode_end(avctx);
570 return ret;
571 }
572
573 /** Subset of GET_VLC for use in hand-roller VLC code */
574 #define VLC_INTERN(dst, table, gb, name, bits, max_depth) \
575 code = table[index][0]; \
576 n = table[index][1]; \
577 if (max_depth > 1 && n < 0) { \
578 LAST_SKIP_BITS(name, gb, bits); \
579 UPDATE_CACHE(name, gb); \
580 \
581 nb_bits = -n; \
582 index = SHOW_UBITS(name, gb, nb_bits) + code; \
583 code = table[index][0]; \
584 n = table[index][1]; \
585 if (max_depth > 2 && n < 0) { \
586 LAST_SKIP_BITS(name, gb, nb_bits); \
587 UPDATE_CACHE(name, gb); \
588 \
589 nb_bits = -n; \
590 index = SHOW_UBITS(name, gb, nb_bits) + code; \
591 code = table[index][0]; \
592 n = table[index][1]; \
593 } \
594 } \
595 dst = code; \
596 LAST_SKIP_BITS(name, gb, n)
597
598
599 #define GET_VLC_DUAL(dst0, dst1, name, gb, dtable, table1, table2, \
600 bits, max_depth, OP) \
601 do { \
602 unsigned int index = SHOW_UBITS(name, gb, bits); \
603 int code, n = dtable[index][1]; \
604 \
605 if (n<=0) { \
606 int nb_bits; \
607 VLC_INTERN(dst0, table1, gb, name, bits, max_depth); \
608 \
609 UPDATE_CACHE(re, gb); \
610 index = SHOW_UBITS(name, gb, bits); \
611 VLC_INTERN(dst1, table2, gb, name, bits, max_depth); \
612 } else { \
613 code = dtable[index][0]; \
614 OP(dst0, dst1, code); \
615 LAST_SKIP_BITS(name, gb, n); \
616 } \
617 } while (0)
618
619 #define OP8bits(dst0, dst1, code) dst0 = code>>8; dst1 = code
620
621 #define READ_2PIX(dst0, dst1, plane1) \
622 UPDATE_CACHE(re, &s->gb); \
623 GET_VLC_DUAL(dst0, dst1, re, &s->gb, s->vlc[4+plane1].table, \
624 s->vlc[0].table, s->vlc[plane1].table, VLC_BITS, 3, OP8bits)
625
decode_422_bitstream(HYuvContext * s,int count)626 static void decode_422_bitstream(HYuvContext *s, int count)
627 {
628 int i, icount;
629 OPEN_READER(re, &s->gb);
630 count /= 2;
631
632 icount = get_bits_left(&s->gb) / (32 * 4);
633 if (count >= icount) {
634 for (i = 0; i < icount; i++) {
635 READ_2PIX(s->temp[0][2 * i], s->temp[1][i], 1);
636 READ_2PIX(s->temp[0][2 * i + 1], s->temp[2][i], 2);
637 }
638 for (; i < count && BITS_LEFT(re, &s->gb) > 0; i++) {
639 READ_2PIX(s->temp[0][2 * i ], s->temp[1][i], 1);
640 if (BITS_LEFT(re, &s->gb) <= 0) break;
641 READ_2PIX(s->temp[0][2 * i + 1], s->temp[2][i], 2);
642 }
643 for (; i < count; i++)
644 s->temp[0][2 * i ] = s->temp[1][i] =
645 s->temp[0][2 * i + 1] = s->temp[2][i] = 0;
646 } else {
647 for (i = 0; i < count; i++) {
648 READ_2PIX(s->temp[0][2 * i], s->temp[1][i], 1);
649 READ_2PIX(s->temp[0][2 * i + 1], s->temp[2][i], 2);
650 }
651 }
652 CLOSE_READER(re, &s->gb);
653 }
654
655 #define READ_2PIX_PLANE(dst0, dst1, plane, OP) \
656 UPDATE_CACHE(re, &s->gb); \
657 GET_VLC_DUAL(dst0, dst1, re, &s->gb, s->vlc[4+plane].table, \
658 s->vlc[plane].table, s->vlc[plane].table, VLC_BITS, 3, OP)
659
660 #define OP14bits(dst0, dst1, code) dst0 = code>>8; dst1 = sign_extend(code, 8)
661
662 /* TODO instead of restarting the read when the code isn't in the first level
663 * of the joint table, jump into the 2nd level of the individual table. */
664 #define READ_2PIX_PLANE16(dst0, dst1, plane){\
665 dst0 = get_vlc2(&s->gb, s->vlc[plane].table, VLC_BITS, 3)<<2;\
666 dst0 += get_bits(&s->gb, 2);\
667 dst1 = get_vlc2(&s->gb, s->vlc[plane].table, VLC_BITS, 3)<<2;\
668 dst1 += get_bits(&s->gb, 2);\
669 }
decode_plane_bitstream(HYuvContext * s,int width,int plane)670 static void decode_plane_bitstream(HYuvContext *s, int width, int plane)
671 {
672 int i, count = width/2;
673
674 if (s->bps <= 8) {
675 OPEN_READER(re, &s->gb);
676 if (count >= (get_bits_left(&s->gb)) / (32 * 2)) {
677 for (i = 0; i < count && BITS_LEFT(re, &s->gb) > 0; i++) {
678 READ_2PIX_PLANE(s->temp[0][2 * i], s->temp[0][2 * i + 1], plane, OP8bits);
679 }
680 } else {
681 for(i=0; i<count; i++){
682 READ_2PIX_PLANE(s->temp[0][2 * i], s->temp[0][2 * i + 1], plane, OP8bits);
683 }
684 }
685 if( width&1 && BITS_LEFT(re, &s->gb)>0 ) {
686 unsigned int index;
687 int nb_bits, code, n;
688 UPDATE_CACHE(re, &s->gb);
689 index = SHOW_UBITS(re, &s->gb, VLC_BITS);
690 VLC_INTERN(s->temp[0][width-1], s->vlc[plane].table,
691 &s->gb, re, VLC_BITS, 3);
692 }
693 CLOSE_READER(re, &s->gb);
694 } else if (s->bps <= 14) {
695 OPEN_READER(re, &s->gb);
696 if (count >= (get_bits_left(&s->gb)) / (32 * 2)) {
697 for (i = 0; i < count && BITS_LEFT(re, &s->gb) > 0; i++) {
698 READ_2PIX_PLANE(s->temp16[0][2 * i], s->temp16[0][2 * i + 1], plane, OP14bits);
699 }
700 } else {
701 for(i=0; i<count; i++){
702 READ_2PIX_PLANE(s->temp16[0][2 * i], s->temp16[0][2 * i + 1], plane, OP14bits);
703 }
704 }
705 if( width&1 && BITS_LEFT(re, &s->gb)>0 ) {
706 unsigned int index;
707 int nb_bits, code, n;
708 UPDATE_CACHE(re, &s->gb);
709 index = SHOW_UBITS(re, &s->gb, VLC_BITS);
710 VLC_INTERN(s->temp16[0][width-1], s->vlc[plane].table,
711 &s->gb, re, VLC_BITS, 3);
712 }
713 CLOSE_READER(re, &s->gb);
714 } else {
715 if (count >= (get_bits_left(&s->gb)) / (32 * 2)) {
716 for (i = 0; i < count && get_bits_left(&s->gb) > 0; i++) {
717 READ_2PIX_PLANE16(s->temp16[0][2 * i], s->temp16[0][2 * i + 1], plane);
718 }
719 } else {
720 for(i=0; i<count; i++){
721 READ_2PIX_PLANE16(s->temp16[0][2 * i], s->temp16[0][2 * i + 1], plane);
722 }
723 }
724 if( width&1 && get_bits_left(&s->gb)>0 ) {
725 int dst = get_vlc2(&s->gb, s->vlc[plane].table, VLC_BITS, 3)<<2;
726 s->temp16[0][width-1] = dst + get_bits(&s->gb, 2);
727 }
728 }
729 }
730
decode_gray_bitstream(HYuvContext * s,int count)731 static void decode_gray_bitstream(HYuvContext *s, int count)
732 {
733 int i;
734 OPEN_READER(re, &s->gb);
735 count /= 2;
736
737 if (count >= (get_bits_left(&s->gb)) / (32 * 2)) {
738 for (i = 0; i < count && BITS_LEFT(re, &s->gb) > 0; i++) {
739 READ_2PIX(s->temp[0][2 * i], s->temp[0][2 * i + 1], 0);
740 }
741 } else {
742 for (i = 0; i < count; i++) {
743 READ_2PIX(s->temp[0][2 * i], s->temp[0][2 * i + 1], 0);
744 }
745 }
746 CLOSE_READER(re, &s->gb);
747 }
748
decode_bgr_1(HYuvContext * s,int count,int decorrelate,int alpha)749 static av_always_inline void decode_bgr_1(HYuvContext *s, int count,
750 int decorrelate, int alpha)
751 {
752 int i;
753 OPEN_READER(re, &s->gb);
754
755 for (i = 0; i < count && BITS_LEFT(re, &s->gb) > 0; i++) {
756 unsigned int index;
757 int code, n, nb_bits;
758
759 UPDATE_CACHE(re, &s->gb);
760 index = SHOW_UBITS(re, &s->gb, VLC_BITS);
761 n = s->vlc[4].table[index][1];
762
763 if (n>0) {
764 code = s->vlc[4].table[index][0];
765 *(uint32_t *) &s->temp[0][4 * i] = s->pix_bgr_map[code];
766 LAST_SKIP_BITS(re, &s->gb, n);
767 } else {
768 if (decorrelate) {
769 VLC_INTERN(s->temp[0][4 * i + G], s->vlc[1].table,
770 &s->gb, re, VLC_BITS, 3);
771
772 UPDATE_CACHE(re, &s->gb);
773 index = SHOW_UBITS(re, &s->gb, VLC_BITS);
774 VLC_INTERN(code, s->vlc[0].table, &s->gb, re, VLC_BITS, 3);
775 s->temp[0][4 * i + B] = code + s->temp[0][4 * i + G];
776
777 UPDATE_CACHE(re, &s->gb);
778 index = SHOW_UBITS(re, &s->gb, VLC_BITS);
779 VLC_INTERN(code, s->vlc[2].table, &s->gb, re, VLC_BITS, 3);
780 s->temp[0][4 * i + R] = code + s->temp[0][4 * i + G];
781 } else {
782 VLC_INTERN(s->temp[0][4 * i + B], s->vlc[0].table,
783 &s->gb, re, VLC_BITS, 3);
784
785 UPDATE_CACHE(re, &s->gb);
786 index = SHOW_UBITS(re, &s->gb, VLC_BITS);
787 VLC_INTERN(s->temp[0][4 * i + G], s->vlc[1].table,
788 &s->gb, re, VLC_BITS, 3);
789
790 UPDATE_CACHE(re, &s->gb);
791 index = SHOW_UBITS(re, &s->gb, VLC_BITS);
792 VLC_INTERN(s->temp[0][4 * i + R], s->vlc[2].table,
793 &s->gb, re, VLC_BITS, 3);
794 }
795 }
796 if (alpha) {
797 UPDATE_CACHE(re, &s->gb);
798 index = SHOW_UBITS(re, &s->gb, VLC_BITS);
799 VLC_INTERN(s->temp[0][4 * i + A], s->vlc[2].table,
800 &s->gb, re, VLC_BITS, 3);
801 } else
802 s->temp[0][4 * i + A] = 0;
803 }
804 CLOSE_READER(re, &s->gb);
805 }
806
decode_bgr_bitstream(HYuvContext * s,int count)807 static void decode_bgr_bitstream(HYuvContext *s, int count)
808 {
809 if (s->decorrelate) {
810 if (s->bitstream_bpp == 24)
811 decode_bgr_1(s, count, 1, 0);
812 else
813 decode_bgr_1(s, count, 1, 1);
814 } else {
815 if (s->bitstream_bpp == 24)
816 decode_bgr_1(s, count, 0, 0);
817 else
818 decode_bgr_1(s, count, 0, 1);
819 }
820 }
821
draw_slice(HYuvContext * s,AVFrame * frame,int y)822 static void draw_slice(HYuvContext *s, AVFrame *frame, int y)
823 {
824 int h, cy, i;
825 int offset[AV_NUM_DATA_POINTERS];
826
827 if (!s->avctx->draw_horiz_band)
828 return;
829
830 h = y - s->last_slice_end;
831 y -= h;
832
833 if (s->bitstream_bpp == 12)
834 cy = y >> 1;
835 else
836 cy = y;
837
838 offset[0] = frame->linesize[0] * y;
839 offset[1] = frame->linesize[1] * cy;
840 offset[2] = frame->linesize[2] * cy;
841 for (i = 3; i < AV_NUM_DATA_POINTERS; i++)
842 offset[i] = 0;
843 emms_c();
844
845 s->avctx->draw_horiz_band(s->avctx, frame, offset, y, 3, h);
846
847 s->last_slice_end = y + h;
848 }
849
left_prediction(HYuvContext * s,uint8_t * dst,const uint8_t * src,int w,int acc)850 static int left_prediction(HYuvContext *s, uint8_t *dst, const uint8_t *src, int w, int acc)
851 {
852 if (s->bps <= 8) {
853 return s->llviddsp.add_left_pred(dst, src, w, acc);
854 } else {
855 return s->llviddsp.add_left_pred_int16(( uint16_t *)dst, (const uint16_t *)src, s->n-1, w, acc);
856 }
857 }
858
add_bytes(HYuvContext * s,uint8_t * dst,uint8_t * src,int w)859 static void add_bytes(HYuvContext *s, uint8_t *dst, uint8_t *src, int w)
860 {
861 if (s->bps <= 8) {
862 s->llviddsp.add_bytes(dst, src, w);
863 } else {
864 s->hdsp.add_int16((uint16_t*)dst, (const uint16_t*)src, s->n - 1, w);
865 }
866 }
867
add_median_prediction(HYuvContext * s,uint8_t * dst,const uint8_t * src,const uint8_t * diff,int w,int * left,int * left_top)868 static void add_median_prediction(HYuvContext *s, uint8_t *dst, const uint8_t *src, const uint8_t *diff, int w, int *left, int *left_top)
869 {
870 if (s->bps <= 8) {
871 s->llviddsp.add_median_pred(dst, src, diff, w, left, left_top);
872 } else {
873 s->hdsp.add_hfyu_median_pred_int16((uint16_t *)dst, (const uint16_t *)src, (const uint16_t *)diff, s->n-1, w, left, left_top);
874 }
875 }
876
decode_slice(AVCodecContext * avctx,AVFrame * p,int height,int buf_size,int y_offset,int table_size)877 static int decode_slice(AVCodecContext *avctx, AVFrame *p, int height,
878 int buf_size, int y_offset, int table_size)
879 {
880 HYuvContext *s = avctx->priv_data;
881 int fake_ystride, fake_ustride, fake_vstride;
882 const int width = s->width;
883 const int width2 = s->width >> 1;
884 int ret;
885
886 if ((ret = init_get_bits8(&s->gb, s->bitstream_buffer + table_size, buf_size - table_size)) < 0)
887 return ret;
888
889 fake_ystride = s->interlaced ? p->linesize[0] * 2 : p->linesize[0];
890 fake_ustride = s->interlaced ? p->linesize[1] * 2 : p->linesize[1];
891 fake_vstride = s->interlaced ? p->linesize[2] * 2 : p->linesize[2];
892
893 if (s->version > 2) {
894 int plane;
895 for(plane = 0; plane < 1 + 2*s->chroma + s->alpha; plane++) {
896 int left, lefttop, y;
897 int w = width;
898 int h = height;
899 int fake_stride = fake_ystride;
900
901 if (s->chroma && (plane == 1 || plane == 2)) {
902 w >>= s->chroma_h_shift;
903 h >>= s->chroma_v_shift;
904 fake_stride = plane == 1 ? fake_ustride : fake_vstride;
905 }
906
907 switch (s->predictor) {
908 case LEFT:
909 case PLANE:
910 decode_plane_bitstream(s, w, plane);
911 left = left_prediction(s, p->data[plane], s->temp[0], w, 0);
912
913 for (y = 1; y < h; y++) {
914 uint8_t *dst = p->data[plane] + p->linesize[plane]*y;
915
916 decode_plane_bitstream(s, w, plane);
917 left = left_prediction(s, dst, s->temp[0], w, left);
918 if (s->predictor == PLANE) {
919 if (y > s->interlaced) {
920 add_bytes(s, dst, dst - fake_stride, w);
921 }
922 }
923 }
924
925 break;
926 case MEDIAN:
927 decode_plane_bitstream(s, w, plane);
928 left= left_prediction(s, p->data[plane], s->temp[0], w, 0);
929
930 y = 1;
931 if (y >= h)
932 break;
933
934 /* second line is left predicted for interlaced case */
935 if (s->interlaced) {
936 decode_plane_bitstream(s, w, plane);
937 left = left_prediction(s, p->data[plane] + p->linesize[plane], s->temp[0], w, left);
938 y++;
939 if (y >= h)
940 break;
941 }
942
943 lefttop = p->data[plane][0];
944 decode_plane_bitstream(s, w, plane);
945 add_median_prediction(s, p->data[plane] + fake_stride, p->data[plane], s->temp[0], w, &left, &lefttop);
946 y++;
947
948 for (; y<h; y++) {
949 uint8_t *dst;
950
951 decode_plane_bitstream(s, w, plane);
952
953 dst = p->data[plane] + p->linesize[plane] * y;
954
955 add_median_prediction(s, dst, dst - fake_stride, s->temp[0], w, &left, &lefttop);
956 }
957
958 break;
959 }
960 }
961 draw_slice(s, p, height);
962 } else if (s->bitstream_bpp < 24) {
963 int y, cy;
964 int lefty, leftu, leftv;
965 int lefttopy, lefttopu, lefttopv;
966
967 if (s->yuy2) {
968 p->data[0][3] = get_bits(&s->gb, 8);
969 p->data[0][2] = get_bits(&s->gb, 8);
970 p->data[0][1] = get_bits(&s->gb, 8);
971 p->data[0][0] = get_bits(&s->gb, 8);
972
973 av_log(avctx, AV_LOG_ERROR,
974 "YUY2 output is not implemented yet\n");
975 return AVERROR_PATCHWELCOME;
976 } else {
977 leftv =
978 p->data[2][0 + y_offset * p->linesize[2]] = get_bits(&s->gb, 8);
979 lefty =
980 p->data[0][1 + y_offset * p->linesize[0]] = get_bits(&s->gb, 8);
981 leftu =
982 p->data[1][0 + y_offset * p->linesize[1]] = get_bits(&s->gb, 8);
983 p->data[0][0 + y_offset * p->linesize[0]] = get_bits(&s->gb, 8);
984
985 switch (s->predictor) {
986 case LEFT:
987 case PLANE:
988 decode_422_bitstream(s, width - 2);
989 lefty = s->llviddsp.add_left_pred(p->data[0] + p->linesize[0] * y_offset + 2, s->temp[0],
990 width - 2, lefty);
991 if (!(s->flags & AV_CODEC_FLAG_GRAY)) {
992 leftu = s->llviddsp.add_left_pred(p->data[1] + p->linesize[1] * y_offset + 1, s->temp[1], width2 - 1, leftu);
993 leftv = s->llviddsp.add_left_pred(p->data[2] + p->linesize[2] * y_offset + 1, s->temp[2], width2 - 1, leftv);
994 }
995
996 for (cy = y = 1; y < height; y++, cy++) {
997 uint8_t *ydst, *udst, *vdst;
998
999 if (s->bitstream_bpp == 12) {
1000 decode_gray_bitstream(s, width);
1001
1002 ydst = p->data[0] + p->linesize[0] * (y + y_offset);
1003
1004 lefty = s->llviddsp.add_left_pred(ydst, s->temp[0],
1005 width, lefty);
1006 if (s->predictor == PLANE) {
1007 if (y > s->interlaced)
1008 s->llviddsp.add_bytes(ydst, ydst - fake_ystride, width);
1009 }
1010 y++;
1011 if (y >= height)
1012 break;
1013 }
1014
1015 draw_slice(s, p, y);
1016
1017 ydst = p->data[0] + p->linesize[0] * (y + y_offset);
1018 udst = p->data[1] + p->linesize[1] * (cy + y_offset);
1019 vdst = p->data[2] + p->linesize[2] * (cy + y_offset);
1020
1021 decode_422_bitstream(s, width);
1022 lefty = s->llviddsp.add_left_pred(ydst, s->temp[0],
1023 width, lefty);
1024 if (!(s->flags & AV_CODEC_FLAG_GRAY)) {
1025 leftu = s->llviddsp.add_left_pred(udst, s->temp[1], width2, leftu);
1026 leftv = s->llviddsp.add_left_pred(vdst, s->temp[2], width2, leftv);
1027 }
1028 if (s->predictor == PLANE) {
1029 if (cy > s->interlaced) {
1030 s->llviddsp.add_bytes(ydst, ydst - fake_ystride, width);
1031 if (!(s->flags & AV_CODEC_FLAG_GRAY)) {
1032 s->llviddsp.add_bytes(udst, udst - fake_ustride, width2);
1033 s->llviddsp.add_bytes(vdst, vdst - fake_vstride, width2);
1034 }
1035 }
1036 }
1037 }
1038 draw_slice(s, p, height);
1039
1040 break;
1041 case MEDIAN:
1042 /* first line except first 2 pixels is left predicted */
1043 decode_422_bitstream(s, width - 2);
1044 lefty = s->llviddsp.add_left_pred(p->data[0] + 2, s->temp[0],
1045 width - 2, lefty);
1046 if (!(s->flags & AV_CODEC_FLAG_GRAY)) {
1047 leftu = s->llviddsp.add_left_pred(p->data[1] + 1, s->temp[1], width2 - 1, leftu);
1048 leftv = s->llviddsp.add_left_pred(p->data[2] + 1, s->temp[2], width2 - 1, leftv);
1049 }
1050
1051 cy = y = 1;
1052 if (y >= height)
1053 break;
1054
1055 /* second line is left predicted for interlaced case */
1056 if (s->interlaced) {
1057 decode_422_bitstream(s, width);
1058 lefty = s->llviddsp.add_left_pred(p->data[0] + p->linesize[0],
1059 s->temp[0], width, lefty);
1060 if (!(s->flags & AV_CODEC_FLAG_GRAY)) {
1061 leftu = s->llviddsp.add_left_pred(p->data[1] + p->linesize[2], s->temp[1], width2, leftu);
1062 leftv = s->llviddsp.add_left_pred(p->data[2] + p->linesize[1], s->temp[2], width2, leftv);
1063 }
1064 y++;
1065 cy++;
1066 if (y >= height)
1067 break;
1068 }
1069
1070 /* next 4 pixels are left predicted too */
1071 decode_422_bitstream(s, 4);
1072 lefty = s->llviddsp.add_left_pred(p->data[0] + fake_ystride,
1073 s->temp[0], 4, lefty);
1074 if (!(s->flags & AV_CODEC_FLAG_GRAY)) {
1075 leftu = s->llviddsp.add_left_pred(p->data[1] + fake_ustride, s->temp[1], 2, leftu);
1076 leftv = s->llviddsp.add_left_pred(p->data[2] + fake_vstride, s->temp[2], 2, leftv);
1077 }
1078
1079 /* next line except the first 4 pixels is median predicted */
1080 lefttopy = p->data[0][3];
1081 decode_422_bitstream(s, width - 4);
1082 s->llviddsp.add_median_pred(p->data[0] + fake_ystride + 4,
1083 p->data[0] + 4, s->temp[0],
1084 width - 4, &lefty, &lefttopy);
1085 if (!(s->flags & AV_CODEC_FLAG_GRAY)) {
1086 lefttopu = p->data[1][1];
1087 lefttopv = p->data[2][1];
1088 s->llviddsp.add_median_pred(p->data[1] + fake_ustride + 2, p->data[1] + 2, s->temp[1], width2 - 2, &leftu, &lefttopu);
1089 s->llviddsp.add_median_pred(p->data[2] + fake_vstride + 2, p->data[2] + 2, s->temp[2], width2 - 2, &leftv, &lefttopv);
1090 }
1091 y++;
1092 cy++;
1093
1094 for (; y < height; y++, cy++) {
1095 uint8_t *ydst, *udst, *vdst;
1096
1097 if (s->bitstream_bpp == 12) {
1098 while (2 * cy > y) {
1099 decode_gray_bitstream(s, width);
1100 ydst = p->data[0] + p->linesize[0] * y;
1101 s->llviddsp.add_median_pred(ydst, ydst - fake_ystride,
1102 s->temp[0], width,
1103 &lefty, &lefttopy);
1104 y++;
1105 }
1106 if (y >= height)
1107 break;
1108 }
1109 draw_slice(s, p, y);
1110
1111 decode_422_bitstream(s, width);
1112
1113 ydst = p->data[0] + p->linesize[0] * y;
1114 udst = p->data[1] + p->linesize[1] * cy;
1115 vdst = p->data[2] + p->linesize[2] * cy;
1116
1117 s->llviddsp.add_median_pred(ydst, ydst - fake_ystride,
1118 s->temp[0], width,
1119 &lefty, &lefttopy);
1120 if (!(s->flags & AV_CODEC_FLAG_GRAY)) {
1121 s->llviddsp.add_median_pred(udst, udst - fake_ustride, s->temp[1], width2, &leftu, &lefttopu);
1122 s->llviddsp.add_median_pred(vdst, vdst - fake_vstride, s->temp[2], width2, &leftv, &lefttopv);
1123 }
1124 }
1125
1126 draw_slice(s, p, height);
1127 break;
1128 }
1129 }
1130 } else {
1131 int y;
1132 uint8_t left[4];
1133 const int last_line = (y_offset + height - 1) * p->linesize[0];
1134
1135 if (s->bitstream_bpp == 32) {
1136 left[A] = p->data[0][last_line + A] = get_bits(&s->gb, 8);
1137 left[R] = p->data[0][last_line + R] = get_bits(&s->gb, 8);
1138 left[G] = p->data[0][last_line + G] = get_bits(&s->gb, 8);
1139 left[B] = p->data[0][last_line + B] = get_bits(&s->gb, 8);
1140 } else {
1141 left[R] = p->data[0][last_line + R] = get_bits(&s->gb, 8);
1142 left[G] = p->data[0][last_line + G] = get_bits(&s->gb, 8);
1143 left[B] = p->data[0][last_line + B] = get_bits(&s->gb, 8);
1144 left[A] = p->data[0][last_line + A] = 255;
1145 skip_bits(&s->gb, 8);
1146 }
1147
1148 if (s->bgr32) {
1149 switch (s->predictor) {
1150 case LEFT:
1151 case PLANE:
1152 decode_bgr_bitstream(s, width - 1);
1153 s->hdsp.add_hfyu_left_pred_bgr32(p->data[0] + last_line + 4,
1154 s->temp[0], width - 1, left);
1155
1156 for (y = height - 2; y >= 0; y--) { // Yes it is stored upside down.
1157 decode_bgr_bitstream(s, width);
1158
1159 s->hdsp.add_hfyu_left_pred_bgr32(p->data[0] + p->linesize[0] * (y + y_offset),
1160 s->temp[0], width, left);
1161 if (s->predictor == PLANE) {
1162 if (s->bitstream_bpp != 32)
1163 left[A] = 0;
1164 if (y < height - 1 - s->interlaced) {
1165 s->llviddsp.add_bytes(p->data[0] + p->linesize[0] * (y + y_offset),
1166 p->data[0] + p->linesize[0] * (y + y_offset) +
1167 fake_ystride, 4 * width);
1168 }
1169 }
1170 }
1171 // just 1 large slice as this is not possible in reverse order
1172 draw_slice(s, p, height);
1173 break;
1174 default:
1175 av_log(avctx, AV_LOG_ERROR,
1176 "prediction type not supported!\n");
1177 }
1178 } else {
1179 av_log(avctx, AV_LOG_ERROR,
1180 "BGR24 output is not implemented yet\n");
1181 return AVERROR_PATCHWELCOME;
1182 }
1183 }
1184
1185 return 0;
1186 }
1187
decode_frame(AVCodecContext * avctx,void * data,int * got_frame,AVPacket * avpkt)1188 static int decode_frame(AVCodecContext *avctx, void *data, int *got_frame,
1189 AVPacket *avpkt)
1190 {
1191 const uint8_t *buf = avpkt->data;
1192 int buf_size = avpkt->size;
1193 HYuvContext *s = avctx->priv_data;
1194 const int width = s->width;
1195 const int height = s->height;
1196 ThreadFrame frame = { .f = data };
1197 AVFrame *const p = data;
1198 int slice, table_size = 0, ret, nb_slices;
1199 unsigned slices_info_offset;
1200 int slice_height;
1201
1202 if (buf_size < (width * height + 7)/8)
1203 return AVERROR_INVALIDDATA;
1204
1205 av_fast_padded_malloc(&s->bitstream_buffer,
1206 &s->bitstream_buffer_size,
1207 buf_size);
1208 if (!s->bitstream_buffer)
1209 return AVERROR(ENOMEM);
1210
1211 s->bdsp.bswap_buf((uint32_t *) s->bitstream_buffer,
1212 (const uint32_t *) buf, buf_size / 4);
1213
1214 if ((ret = ff_thread_get_buffer(avctx, &frame, 0)) < 0)
1215 return ret;
1216
1217 if (s->context) {
1218 table_size = read_huffman_tables(s, s->bitstream_buffer, buf_size);
1219 if (table_size < 0)
1220 return table_size;
1221 }
1222
1223 if ((unsigned) (buf_size - table_size) >= INT_MAX / 8)
1224 return AVERROR_INVALIDDATA;
1225
1226 s->last_slice_end = 0;
1227
1228 if (avctx->codec_id == AV_CODEC_ID_HYMT &&
1229 (buf_size > 32 && AV_RL32(avpkt->data + buf_size - 16) == 0)) {
1230 slices_info_offset = AV_RL32(avpkt->data + buf_size - 4);
1231 slice_height = AV_RL32(avpkt->data + buf_size - 8);
1232 nb_slices = AV_RL32(avpkt->data + buf_size - 12);
1233 if (nb_slices * 8LL + slices_info_offset > buf_size - 16 ||
1234 s->chroma_v_shift ||
1235 slice_height <= 0 || nb_slices * (uint64_t)slice_height > height)
1236 return AVERROR_INVALIDDATA;
1237 } else {
1238 slice_height = height;
1239 nb_slices = 1;
1240 }
1241
1242 for (slice = 0; slice < nb_slices; slice++) {
1243 int y_offset, slice_offset, slice_size;
1244
1245 if (nb_slices > 1) {
1246 slice_offset = AV_RL32(avpkt->data + slices_info_offset + slice * 8);
1247 slice_size = AV_RL32(avpkt->data + slices_info_offset + slice * 8 + 4);
1248
1249 if (slice_offset < 0 || slice_size <= 0 || (slice_offset&3) ||
1250 slice_offset + (int64_t)slice_size > buf_size)
1251 return AVERROR_INVALIDDATA;
1252
1253 y_offset = height - (slice + 1) * slice_height;
1254 s->bdsp.bswap_buf((uint32_t *)s->bitstream_buffer,
1255 (const uint32_t *)(buf + slice_offset), slice_size / 4);
1256 } else {
1257 y_offset = 0;
1258 slice_offset = 0;
1259 slice_size = buf_size;
1260 }
1261
1262 ret = decode_slice(avctx, p, slice_height, slice_size, y_offset, table_size);
1263 emms_c();
1264 if (ret < 0)
1265 return ret;
1266 }
1267
1268 *got_frame = 1;
1269
1270 return (get_bits_count(&s->gb) + 31) / 32 * 4 + table_size;
1271 }
1272
1273 AVCodec ff_huffyuv_decoder = {
1274 .name = "huffyuv",
1275 .long_name = NULL_IF_CONFIG_SMALL("Huffyuv / HuffYUV"),
1276 .type = AVMEDIA_TYPE_VIDEO,
1277 .id = AV_CODEC_ID_HUFFYUV,
1278 .priv_data_size = sizeof(HYuvContext),
1279 .init = decode_init,
1280 .close = decode_end,
1281 .decode = decode_frame,
1282 .capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_DRAW_HORIZ_BAND |
1283 AV_CODEC_CAP_FRAME_THREADS,
1284 };
1285
1286 #if CONFIG_FFVHUFF_DECODER
1287 AVCodec ff_ffvhuff_decoder = {
1288 .name = "ffvhuff",
1289 .long_name = NULL_IF_CONFIG_SMALL("Huffyuv FFmpeg variant"),
1290 .type = AVMEDIA_TYPE_VIDEO,
1291 .id = AV_CODEC_ID_FFVHUFF,
1292 .priv_data_size = sizeof(HYuvContext),
1293 .init = decode_init,
1294 .close = decode_end,
1295 .decode = decode_frame,
1296 .capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_DRAW_HORIZ_BAND |
1297 AV_CODEC_CAP_FRAME_THREADS,
1298 };
1299 #endif /* CONFIG_FFVHUFF_DECODER */
1300
1301 #if CONFIG_HYMT_DECODER
1302 AVCodec ff_hymt_decoder = {
1303 .name = "hymt",
1304 .long_name = NULL_IF_CONFIG_SMALL("HuffYUV MT"),
1305 .type = AVMEDIA_TYPE_VIDEO,
1306 .id = AV_CODEC_ID_HYMT,
1307 .priv_data_size = sizeof(HYuvContext),
1308 .init = decode_init,
1309 .close = decode_end,
1310 .decode = decode_frame,
1311 .capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_DRAW_HORIZ_BAND |
1312 AV_CODEC_CAP_FRAME_THREADS,
1313 };
1314 #endif /* CONFIG_HYMT_DECODER */
1315