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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
45static 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
53static 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
61static 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
80static 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
99static 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
118static 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;
203out:
204 av_freep(&symbols);
205 return ret;
206}
207
208static 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
237static 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
277static 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
291static 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 0x170:
422 avctx->pix_fmt = AV_PIX_FMT_GRAY8A;
423 break;
424 case 0x470:
425 avctx->pix_fmt = AV_PIX_FMT_GBRP;
426 break;
427 case 0x480:
428 avctx->pix_fmt = AV_PIX_FMT_GBRP9;
429 break;
430 case 0x490:
431 avctx->pix_fmt = AV_PIX_FMT_GBRP10;
432 break;
433 case 0x4B0:
434 avctx->pix_fmt = AV_PIX_FMT_GBRP12;
435 break;
436 case 0x4D0:
437 avctx->pix_fmt = AV_PIX_FMT_GBRP14;
438 break;
439 case 0x4F0:
440 avctx->pix_fmt = AV_PIX_FMT_GBRP16;
441 break;
442 case 0x570:
443 avctx->pix_fmt = AV_PIX_FMT_GBRAP;
444 break;
445 case 0x670:
446 avctx->pix_fmt = AV_PIX_FMT_YUV444P;
447 break;
448 case 0x680:
449 avctx->pix_fmt = AV_PIX_FMT_YUV444P9;
450 break;
451 case 0x690:
452 avctx->pix_fmt = AV_PIX_FMT_YUV444P10;
453 break;
454 case 0x6B0:
455 avctx->pix_fmt = AV_PIX_FMT_YUV444P12;
456 break;
457 case 0x6D0:
458 avctx->pix_fmt = AV_PIX_FMT_YUV444P14;
459 break;
460 case 0x6F0:
461 avctx->pix_fmt = AV_PIX_FMT_YUV444P16;
462 break;
463 case 0x671:
464 avctx->pix_fmt = AV_PIX_FMT_YUV422P;
465 break;
466 case 0x681:
467 avctx->pix_fmt = AV_PIX_FMT_YUV422P9;
468 break;
469 case 0x691:
470 avctx->pix_fmt = AV_PIX_FMT_YUV422P10;
471 break;
472 case 0x6B1:
473 avctx->pix_fmt = AV_PIX_FMT_YUV422P12;
474 break;
475 case 0x6D1:
476 avctx->pix_fmt = AV_PIX_FMT_YUV422P14;
477 break;
478 case 0x6F1:
479 avctx->pix_fmt = AV_PIX_FMT_YUV422P16;
480 break;
481 case 0x672:
482 avctx->pix_fmt = AV_PIX_FMT_YUV411P;
483 break;
484 case 0x674:
485 avctx->pix_fmt = AV_PIX_FMT_YUV440P;
486 break;
487 case 0x675:
488 avctx->pix_fmt = AV_PIX_FMT_YUV420P;
489 break;
490 case 0x685:
491 avctx->pix_fmt = AV_PIX_FMT_YUV420P9;
492 break;
493 case 0x695:
494 avctx->pix_fmt = AV_PIX_FMT_YUV420P10;
495 break;
496 case 0x6B5:
497 avctx->pix_fmt = AV_PIX_FMT_YUV420P12;
498 break;
499 case 0x6D5:
500 avctx->pix_fmt = AV_PIX_FMT_YUV420P14;
501 break;
502 case 0x6F5:
503 avctx->pix_fmt = AV_PIX_FMT_YUV420P16;
504 break;
505 case 0x67A:
506 avctx->pix_fmt = AV_PIX_FMT_YUV410P;
507 break;
508 case 0x770:
509 avctx->pix_fmt = AV_PIX_FMT_YUVA444P;
510 break;
511 case 0x780:
512 avctx->pix_fmt = AV_PIX_FMT_YUVA444P9;
513 break;
514 case 0x790:
515 avctx->pix_fmt = AV_PIX_FMT_YUVA444P10;
516 break;
517 case 0x7F0:
518 avctx->pix_fmt = AV_PIX_FMT_YUVA444P16;
519 break;
520 case 0x771:
521 avctx->pix_fmt = AV_PIX_FMT_YUVA422P;
522 break;
523 case 0x781:
524 avctx->pix_fmt = AV_PIX_FMT_YUVA422P9;
525 break;
526 case 0x791:
527 avctx->pix_fmt = AV_PIX_FMT_YUVA422P10;
528 break;
529 case 0x7F1:
530 avctx->pix_fmt = AV_PIX_FMT_YUVA422P16;
531 break;
532 case 0x775:
533 avctx->pix_fmt = AV_PIX_FMT_YUVA420P;
534 break;
535 case 0x785:
536 avctx->pix_fmt = AV_PIX_FMT_YUVA420P9;
537 break;
538 case 0x795:
539 avctx->pix_fmt = AV_PIX_FMT_YUVA420P10;
540 break;
541 case 0x7F5:
542 avctx->pix_fmt = AV_PIX_FMT_YUVA420P16;
543 break;
544 default:
545 ret = AVERROR_INVALIDDATA;
546 goto error;
547 }
548 }
549
550 ff_huffyuv_common_init(avctx);
551
552 if ((avctx->pix_fmt == AV_PIX_FMT_YUV422P || avctx->pix_fmt == AV_PIX_FMT_YUV420P) && avctx->width & 1) {
553 av_log(avctx, AV_LOG_ERROR, "width must be even for this colorspace\n");
554 ret = AVERROR_INVALIDDATA;
555 goto error;
556 }
557 if (s->predictor == MEDIAN && avctx->pix_fmt == AV_PIX_FMT_YUV422P &&
558 avctx->width % 4) {
559 av_log(avctx, AV_LOG_ERROR, "width must be a multiple of 4 "
560 "for this combination of colorspace and predictor type.\n");
561 ret = AVERROR_INVALIDDATA;
562 goto error;
563 }
564
565 if ((ret = ff_huffyuv_alloc_temp(s)) < 0) {
566 ff_huffyuv_common_end(s);
567 goto error;
568 }
569
570 return 0;
571 error:
572 decode_end(avctx);
573 return ret;
574}
575
576#if HAVE_THREADS
577static av_cold int decode_init_thread_copy(AVCodecContext *avctx)
578{
579 HYuvContext *s = avctx->priv_data;
580 int i, ret;
581
582 s->avctx = avctx;
583
584 if ((ret = ff_huffyuv_alloc_temp(s)) < 0) {
585 ff_huffyuv_common_end(s);
586 return ret;
587 }
588
589 for (i = 0; i < 8; i++)
590 s->vlc[i].table = NULL;
591
592 if (s->version >= 2) {
593 if ((ret = read_huffman_tables(s, avctx->extradata + 4,
594 avctx->extradata_size)) < 0)
595 return ret;
596 } else {
597 if ((ret = read_old_huffman_tables(s)) < 0)
598 return ret;
599 }
600
601 return 0;
602}
603#endif
604
605/** Subset of GET_VLC for use in hand-roller VLC code */
606#define VLC_INTERN(dst, table, gb, name, bits, max_depth) \
607 code = table[index][0]; \
608 n = table[index][1]; \
609 if (max_depth > 1 && n < 0) { \
610 LAST_SKIP_BITS(name, gb, bits); \
611 UPDATE_CACHE(name, gb); \
612 \
613 nb_bits = -n; \
614 index = SHOW_UBITS(name, gb, nb_bits) + code; \
615 code = table[index][0]; \
616 n = table[index][1]; \
617 if (max_depth > 2 && n < 0) { \
618 LAST_SKIP_BITS(name, gb, nb_bits); \
619 UPDATE_CACHE(name, gb); \
620 \
621 nb_bits = -n; \
622 index = SHOW_UBITS(name, gb, nb_bits) + code; \
623 code = table[index][0]; \
624 n = table[index][1]; \
625 } \
626 } \
627 dst = code; \
628 LAST_SKIP_BITS(name, gb, n)
629
630
631#define GET_VLC_DUAL(dst0, dst1, name, gb, dtable, table1, table2, \
632 bits, max_depth, OP) \
633 do { \
634 unsigned int index = SHOW_UBITS(name, gb, bits); \
635 int code, n = dtable[index][1]; \
636 \
637 if (n<=0) { \
638 int nb_bits; \
639 VLC_INTERN(dst0, table1, gb, name, bits, max_depth); \
640 \
641 UPDATE_CACHE(re, gb); \
642 index = SHOW_UBITS(name, gb, bits); \
643 VLC_INTERN(dst1, table2, gb, name, bits, max_depth); \
644 } else { \
645 code = dtable[index][0]; \
646 OP(dst0, dst1, code); \
647 LAST_SKIP_BITS(name, gb, n); \
648 } \
649 } while (0)
650
651#define OP8bits(dst0, dst1, code) dst0 = code>>8; dst1 = code
652
653#define READ_2PIX(dst0, dst1, plane1) \
654 UPDATE_CACHE(re, &s->gb); \
655 GET_VLC_DUAL(dst0, dst1, re, &s->gb, s->vlc[4+plane1].table, \
656 s->vlc[0].table, s->vlc[plane1].table, VLC_BITS, 3, OP8bits)
657
658static void decode_422_bitstream(HYuvContext *s, int count)
659{
660 int i, icount;
661 OPEN_READER(re, &s->gb);
662 count /= 2;
663
664 icount = get_bits_left(&s->gb) / (32 * 4);
665 if (count >= icount) {
666 for (i = 0; i < icount; i++) {
667 READ_2PIX(s->temp[0][2 * i], s->temp[1][i], 1);
668 READ_2PIX(s->temp[0][2 * i + 1], s->temp[2][i], 2);
669 }
670 for (; i < count && BITS_LEFT(re, &s->gb) > 0; i++) {
671 READ_2PIX(s->temp[0][2 * i ], s->temp[1][i], 1);
672 if (BITS_LEFT(re, &s->gb) <= 0) break;
673 READ_2PIX(s->temp[0][2 * i + 1], s->temp[2][i], 2);
674 }
675 for (; i < count; i++)
676 s->temp[0][2 * i ] = s->temp[1][i] =
677 s->temp[0][2 * i + 1] = s->temp[2][i] = 0;
678 } else {
679 for (i = 0; i < count; i++) {
680 READ_2PIX(s->temp[0][2 * i], s->temp[1][i], 1);
681 READ_2PIX(s->temp[0][2 * i + 1], s->temp[2][i], 2);
682 }
683 }
684 CLOSE_READER(re, &s->gb);
685}
686
687#define READ_2PIX_PLANE(dst0, dst1, plane, OP) \
688 UPDATE_CACHE(re, &s->gb); \
689 GET_VLC_DUAL(dst0, dst1, re, &s->gb, s->vlc[4+plane].table, \
690 s->vlc[plane].table, s->vlc[plane].table, VLC_BITS, 3, OP)
691
692#define OP14bits(dst0, dst1, code) dst0 = code>>8; dst1 = sign_extend(code, 8)
693
694/* TODO instead of restarting the read when the code isn't in the first level
695 * of the joint table, jump into the 2nd level of the individual table. */
696#define READ_2PIX_PLANE16(dst0, dst1, plane){\
697 dst0 = get_vlc2(&s->gb, s->vlc[plane].table, VLC_BITS, 3)<<2;\
698 dst0 += get_bits(&s->gb, 2);\
699 dst1 = get_vlc2(&s->gb, s->vlc[plane].table, VLC_BITS, 3)<<2;\
700 dst1 += get_bits(&s->gb, 2);\
701}
702static void decode_plane_bitstream(HYuvContext *s, int width, int plane)
703{
704 int i, count = width/2;
705
706 if (s->bps <= 8) {
707 OPEN_READER(re, &s->gb);
708 if (count >= (get_bits_left(&s->gb)) / (32 * 2)) {
709 for (i = 0; i < count && BITS_LEFT(re, &s->gb) > 0; i++) {
710 READ_2PIX_PLANE(s->temp[0][2 * i], s->temp[0][2 * i + 1], plane, OP8bits);
711 }
712 } else {
713 for(i=0; i<count; i++){
714 READ_2PIX_PLANE(s->temp[0][2 * i], s->temp[0][2 * i + 1], plane, OP8bits);
715 }
716 }
717 if( width&1 && BITS_LEFT(re, &s->gb)>0 ) {
718 unsigned int index;
719 int nb_bits, code, n;
720 UPDATE_CACHE(re, &s->gb);
721 index = SHOW_UBITS(re, &s->gb, VLC_BITS);
722 VLC_INTERN(s->temp[0][width-1], s->vlc[plane].table,
723 &s->gb, re, VLC_BITS, 3);
724 }
725 CLOSE_READER(re, &s->gb);
726 } else if (s->bps <= 14) {
727 OPEN_READER(re, &s->gb);
728 if (count >= (get_bits_left(&s->gb)) / (32 * 2)) {
729 for (i = 0; i < count && BITS_LEFT(re, &s->gb) > 0; i++) {
730 READ_2PIX_PLANE(s->temp16[0][2 * i], s->temp16[0][2 * i + 1], plane, OP14bits);
731 }
732 } else {
733 for(i=0; i<count; i++){
734 READ_2PIX_PLANE(s->temp16[0][2 * i], s->temp16[0][2 * i + 1], plane, OP14bits);
735 }
736 }
737 if( width&1 && BITS_LEFT(re, &s->gb)>0 ) {
738 unsigned int index;
739 int nb_bits, code, n;
740 UPDATE_CACHE(re, &s->gb);
741 index = SHOW_UBITS(re, &s->gb, VLC_BITS);
742 VLC_INTERN(s->temp16[0][width-1], s->vlc[plane].table,
743 &s->gb, re, VLC_BITS, 3);
744 }
745 CLOSE_READER(re, &s->gb);
746 } else {
747 if (count >= (get_bits_left(&s->gb)) / (32 * 2)) {
748 for (i = 0; i < count && get_bits_left(&s->gb) > 0; i++) {
749 READ_2PIX_PLANE16(s->temp16[0][2 * i], s->temp16[0][2 * i + 1], plane);
750 }
751 } else {
752 for(i=0; i<count; i++){
753 READ_2PIX_PLANE16(s->temp16[0][2 * i], s->temp16[0][2 * i + 1], plane);
754 }
755 }
756 if( width&1 && get_bits_left(&s->gb)>0 ) {
757 int dst = get_vlc2(&s->gb, s->vlc[plane].table, VLC_BITS, 3)<<2;
758 s->temp16[0][width-1] = dst + get_bits(&s->gb, 2);
759 }
760 }
761}
762
763static void decode_gray_bitstream(HYuvContext *s, int count)
764{
765 int i;
766 OPEN_READER(re, &s->gb);
767 count /= 2;
768
769 if (count >= (get_bits_left(&s->gb)) / (32 * 2)) {
770 for (i = 0; i < count && BITS_LEFT(re, &s->gb) > 0; i++) {
771 READ_2PIX(s->temp[0][2 * i], s->temp[0][2 * i + 1], 0);
772 }
773 } else {
774 for (i = 0; i < count; i++) {
775 READ_2PIX(s->temp[0][2 * i], s->temp[0][2 * i + 1], 0);
776 }
777 }
778 CLOSE_READER(re, &s->gb);
779}
780
781static av_always_inline void decode_bgr_1(HYuvContext *s, int count,
782 int decorrelate, int alpha)
783{
784 int i;
785 OPEN_READER(re, &s->gb);
786
787 for (i = 0; i < count && BITS_LEFT(re, &s->gb) > 0; i++) {
788 unsigned int index;
789 int code, n, nb_bits;
790
791 UPDATE_CACHE(re, &s->gb);
792 index = SHOW_UBITS(re, &s->gb, VLC_BITS);
793 n = s->vlc[4].table[index][1];
794
795 if (n>0) {
796 code = s->vlc[4].table[index][0];
797 *(uint32_t *) &s->temp[0][4 * i] = s->pix_bgr_map[code];
798 LAST_SKIP_BITS(re, &s->gb, n);
799 } else {
800 if (decorrelate) {
801 VLC_INTERN(s->temp[0][4 * i + G], s->vlc[1].table,
802 &s->gb, re, VLC_BITS, 3);
803
804 UPDATE_CACHE(re, &s->gb);
805 index = SHOW_UBITS(re, &s->gb, VLC_BITS);
806 VLC_INTERN(code, s->vlc[0].table, &s->gb, re, VLC_BITS, 3);
807 s->temp[0][4 * i + B] = code + s->temp[0][4 * i + G];
808
809 UPDATE_CACHE(re, &s->gb);
810 index = SHOW_UBITS(re, &s->gb, VLC_BITS);
811 VLC_INTERN(code, s->vlc[2].table, &s->gb, re, VLC_BITS, 3);
812 s->temp[0][4 * i + R] = code + s->temp[0][4 * i + G];
813 } else {
814 VLC_INTERN(s->temp[0][4 * i + B], s->vlc[0].table,
815 &s->gb, re, VLC_BITS, 3);
816
817 UPDATE_CACHE(re, &s->gb);
818 index = SHOW_UBITS(re, &s->gb, VLC_BITS);
819 VLC_INTERN(s->temp[0][4 * i + G], s->vlc[1].table,
820 &s->gb, re, VLC_BITS, 3);
821
822 UPDATE_CACHE(re, &s->gb);
823 index = SHOW_UBITS(re, &s->gb, VLC_BITS);
824 VLC_INTERN(s->temp[0][4 * i + R], s->vlc[2].table,
825 &s->gb, re, VLC_BITS, 3);
826 }
827 }
828 if (alpha) {
829 UPDATE_CACHE(re, &s->gb);
830 index = SHOW_UBITS(re, &s->gb, VLC_BITS);
831 VLC_INTERN(s->temp[0][4 * i + A], s->vlc[2].table,
832 &s->gb, re, VLC_BITS, 3);
833 } else
834 s->temp[0][4 * i + A] = 0;
835 }
836 CLOSE_READER(re, &s->gb);
837}
838
839static void decode_bgr_bitstream(HYuvContext *s, int count)
840{
841 if (s->decorrelate) {
842 if (s->bitstream_bpp == 24)
843 decode_bgr_1(s, count, 1, 0);
844 else
845 decode_bgr_1(s, count, 1, 1);
846 } else {
847 if (s->bitstream_bpp == 24)
848 decode_bgr_1(s, count, 0, 0);
849 else
850 decode_bgr_1(s, count, 0, 1);
851 }
852}
853
854static void draw_slice(HYuvContext *s, AVFrame *frame, int y)
855{
856 int h, cy, i;
857 int offset[AV_NUM_DATA_POINTERS];
858
859 if (!s->avctx->draw_horiz_band)
860 return;
861
862 h = y - s->last_slice_end;
863 y -= h;
864
865 if (s->bitstream_bpp == 12)
866 cy = y >> 1;
867 else
868 cy = y;
869
870 offset[0] = frame->linesize[0] * y;
871 offset[1] = frame->linesize[1] * cy;
872 offset[2] = frame->linesize[2] * cy;
873 for (i = 3; i < AV_NUM_DATA_POINTERS; i++)
874 offset[i] = 0;
875 emms_c();
876
877 s->avctx->draw_horiz_band(s->avctx, frame, offset, y, 3, h);
878
879 s->last_slice_end = y + h;
880}
881
882static int left_prediction(HYuvContext *s, uint8_t *dst, const uint8_t *src, int w, int acc)
883{
884 if (s->bps <= 8) {
885 return s->llviddsp.add_left_pred(dst, src, w, acc);
886 } else {
887 return s->llviddsp.add_left_pred_int16(( uint16_t *)dst, (const uint16_t *)src, s->n-1, w, acc);
888 }
889}
890
891static void add_bytes(HYuvContext *s, uint8_t *dst, uint8_t *src, int w)
892{
893 if (s->bps <= 8) {
894 s->llviddsp.add_bytes(dst, src, w);
895 } else {
896 s->hdsp.add_int16((uint16_t*)dst, (const uint16_t*)src, s->n - 1, w);
897 }
898}
899
900static void add_median_prediction(HYuvContext *s, uint8_t *dst, const uint8_t *src, const uint8_t *diff, int w, int *left, int *left_top)
901{
902 if (s->bps <= 8) {
903 s->llviddsp.add_median_pred(dst, src, diff, w, left, left_top);
904 } else {
905 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);
906 }
907}
908static int decode_frame(AVCodecContext *avctx, void *data, int *got_frame,
909 AVPacket *avpkt)
910{
911 const uint8_t *buf = avpkt->data;
912 int buf_size = avpkt->size;
913 HYuvContext *s = avctx->priv_data;
914 const int width = s->width;
915 const int width2 = s->width >> 1;
916 const int height = s->height;
917 int fake_ystride, fake_ustride, fake_vstride;
918 ThreadFrame frame = { .f = data };
919 AVFrame *const p = data;
920 int table_size = 0, ret;
921
922 av_fast_padded_malloc(&s->bitstream_buffer,
923 &s->bitstream_buffer_size,
924 buf_size);
925 if (!s->bitstream_buffer)
926 return AVERROR(ENOMEM);
927
928 s->bdsp.bswap_buf((uint32_t *) s->bitstream_buffer,
929 (const uint32_t *) buf, buf_size / 4);
930
931 if ((ret = ff_thread_get_buffer(avctx, &frame, 0)) < 0)
932 return ret;
933
934 if (s->context) {
935 table_size = read_huffman_tables(s, s->bitstream_buffer, buf_size);
936 if (table_size < 0)
937 return table_size;
938 }
939
940 if ((unsigned) (buf_size - table_size) >= INT_MAX / 8)
941 return AVERROR_INVALIDDATA;
942
943 if ((ret = init_get_bits(&s->gb, s->bitstream_buffer + table_size,
944 (buf_size - table_size) * 8)) < 0)
945 return ret;
946
947 fake_ystride = s->interlaced ? p->linesize[0] * 2 : p->linesize[0];
948 fake_ustride = s->interlaced ? p->linesize[1] * 2 : p->linesize[1];
949 fake_vstride = s->interlaced ? p->linesize[2] * 2 : p->linesize[2];
950
951 s->last_slice_end = 0;
952
953 if (s->version > 2) {
954 int plane;
955 for(plane = 0; plane < 1 + 2*s->chroma + s->alpha; plane++) {
956 int left, lefttop, y;
957 int w = width;
958 int h = height;
959 int fake_stride = fake_ystride;
960
961 if (s->chroma && (plane == 1 || plane == 2)) {
962 w >>= s->chroma_h_shift;
963 h >>= s->chroma_v_shift;
964 fake_stride = plane == 1 ? fake_ustride : fake_vstride;
965 }
966
967 switch (s->predictor) {
968 case LEFT:
969 case PLANE:
970 decode_plane_bitstream(s, w, plane);
971 left = left_prediction(s, p->data[plane], s->temp[0], w, 0);
972
973 for (y = 1; y < h; y++) {
974 uint8_t *dst = p->data[plane] + p->linesize[plane]*y;
975
976 decode_plane_bitstream(s, w, plane);
977 left = left_prediction(s, dst, s->temp[0], w, left);
978 if (s->predictor == PLANE) {
979 if (y > s->interlaced) {
980 add_bytes(s, dst, dst - fake_stride, w);
981 }
982 }
983 }
984
985 break;
986 case MEDIAN:
987 decode_plane_bitstream(s, w, plane);
988 left= left_prediction(s, p->data[plane], s->temp[0], w, 0);
989
990 y = 1;
991
992 /* second line is left predicted for interlaced case */
993 if (s->interlaced) {
994 decode_plane_bitstream(s, w, plane);
995 left = left_prediction(s, p->data[plane] + p->linesize[plane], s->temp[0], w, left);
996 y++;
997 }
998
999 lefttop = p->data[plane][0];
1000 decode_plane_bitstream(s, w, plane);
1001 add_median_prediction(s, p->data[plane] + fake_stride, p->data[plane], s->temp[0], w, &left, &lefttop);
1002 y++;
1003
1004 for (; y<h; y++) {
1005 uint8_t *dst;
1006
1007 decode_plane_bitstream(s, w, plane);
1008
1009 dst = p->data[plane] + p->linesize[plane] * y;
1010
1011 add_median_prediction(s, dst, dst - fake_stride, s->temp[0], w, &left, &lefttop);
1012 }
1013
1014 break;
1015 }
1016 }
1017 draw_slice(s, p, height);
1018 } else if (s->bitstream_bpp < 24) {
1019 int y, cy;
1020 int lefty, leftu, leftv;
1021 int lefttopy, lefttopu, lefttopv;
1022
1023 if (s->yuy2) {
1024 p->data[0][3] = get_bits(&s->gb, 8);
1025 p->data[0][2] = get_bits(&s->gb, 8);
1026 p->data[0][1] = get_bits(&s->gb, 8);
1027 p->data[0][0] = get_bits(&s->gb, 8);
1028
1029 av_log(avctx, AV_LOG_ERROR,
1030 "YUY2 output is not implemented yet\n");
1031 return AVERROR_PATCHWELCOME;
1032 } else {
1033 leftv =
1034 p->data[2][0] = get_bits(&s->gb, 8);
1035 lefty =
1036 p->data[0][1] = get_bits(&s->gb, 8);
1037 leftu =
1038 p->data[1][0] = get_bits(&s->gb, 8);
1039 p->data[0][0] = get_bits(&s->gb, 8);
1040
1041 switch (s->predictor) {
1042 case LEFT:
1043 case PLANE:
1044 decode_422_bitstream(s, width - 2);
1045 lefty = s->llviddsp.add_left_pred(p->data[0] + 2, s->temp[0],
1046 width - 2, lefty);
1047 if (!(s->flags & AV_CODEC_FLAG_GRAY)) {
1048 leftu = s->llviddsp.add_left_pred(p->data[1] + 1, s->temp[1], width2 - 1, leftu);
1049 leftv = s->llviddsp.add_left_pred(p->data[2] + 1, s->temp[2], width2 - 1, leftv);
1050 }
1051
1052 for (cy = y = 1; y < s->height; y++, cy++) {
1053 uint8_t *ydst, *udst, *vdst;
1054
1055 if (s->bitstream_bpp == 12) {
1056 decode_gray_bitstream(s, width);
1057
1058 ydst = p->data[0] + p->linesize[0] * y;
1059
1060 lefty = s->llviddsp.add_left_pred(ydst, s->temp[0],
1061 width, lefty);
1062 if (s->predictor == PLANE) {
1063 if (y > s->interlaced)
1064 s->llviddsp.add_bytes(ydst, ydst - fake_ystride, width);
1065 }
1066 y++;
1067 if (y >= s->height)
1068 break;
1069 }
1070
1071 draw_slice(s, p, y);
1072
1073 ydst = p->data[0] + p->linesize[0] * y;
1074 udst = p->data[1] + p->linesize[1] * cy;
1075 vdst = p->data[2] + p->linesize[2] * cy;
1076
1077 decode_422_bitstream(s, width);
1078 lefty = s->llviddsp.add_left_pred(ydst, s->temp[0],
1079 width, lefty);
1080 if (!(s->flags & AV_CODEC_FLAG_GRAY)) {
1081 leftu = s->llviddsp.add_left_pred(udst, s->temp[1], width2, leftu);
1082 leftv = s->llviddsp.add_left_pred(vdst, s->temp[2], width2, leftv);
1083 }
1084 if (s->predictor == PLANE) {
1085 if (cy > s->interlaced) {
1086 s->llviddsp.add_bytes(ydst, ydst - fake_ystride, width);
1087 if (!(s->flags & AV_CODEC_FLAG_GRAY)) {
1088 s->llviddsp.add_bytes(udst, udst - fake_ustride, width2);
1089 s->llviddsp.add_bytes(vdst, vdst - fake_vstride, width2);
1090 }
1091 }
1092 }
1093 }
1094 draw_slice(s, p, height);
1095
1096 break;
1097 case MEDIAN:
1098 /* first line except first 2 pixels is left predicted */
1099 decode_422_bitstream(s, width - 2);
1100 lefty = s->llviddsp.add_left_pred(p->data[0] + 2, s->temp[0],
1101 width - 2, lefty);
1102 if (!(s->flags & AV_CODEC_FLAG_GRAY)) {
1103 leftu = s->llviddsp.add_left_pred(p->data[1] + 1, s->temp[1], width2 - 1, leftu);
1104 leftv = s->llviddsp.add_left_pred(p->data[2] + 1, s->temp[2], width2 - 1, leftv);
1105 }
1106
1107 cy = y = 1;
1108
1109 /* second line is left predicted for interlaced case */
1110 if (s->interlaced) {
1111 decode_422_bitstream(s, width);
1112 lefty = s->llviddsp.add_left_pred(p->data[0] + p->linesize[0],
1113 s->temp[0], width, lefty);
1114 if (!(s->flags & AV_CODEC_FLAG_GRAY)) {
1115 leftu = s->llviddsp.add_left_pred(p->data[1] + p->linesize[2], s->temp[1], width2, leftu);
1116 leftv = s->llviddsp.add_left_pred(p->data[2] + p->linesize[1], s->temp[2], width2, leftv);
1117 }
1118 y++;
1119 cy++;
1120 }
1121
1122 /* next 4 pixels are left predicted too */
1123 decode_422_bitstream(s, 4);
1124 lefty = s->llviddsp.add_left_pred(p->data[0] + fake_ystride,
1125 s->temp[0], 4, lefty);
1126 if (!(s->flags & AV_CODEC_FLAG_GRAY)) {
1127 leftu = s->llviddsp.add_left_pred(p->data[1] + fake_ustride, s->temp[1], 2, leftu);
1128 leftv = s->llviddsp.add_left_pred(p->data[2] + fake_vstride, s->temp[2], 2, leftv);
1129 }
1130
1131 /* next line except the first 4 pixels is median predicted */
1132 lefttopy = p->data[0][3];
1133 decode_422_bitstream(s, width - 4);
1134 s->llviddsp.add_median_pred(p->data[0] + fake_ystride + 4,
1135 p->data[0] + 4, s->temp[0],
1136 width - 4, &lefty, &lefttopy);
1137 if (!(s->flags & AV_CODEC_FLAG_GRAY)) {
1138 lefttopu = p->data[1][1];
1139 lefttopv = p->data[2][1];
1140 s->llviddsp.add_median_pred(p->data[1] + fake_ustride + 2, p->data[1] + 2, s->temp[1], width2 - 2, &leftu, &lefttopu);
1141 s->llviddsp.add_median_pred(p->data[2] + fake_vstride + 2, p->data[2] + 2, s->temp[2], width2 - 2, &leftv, &lefttopv);
1142 }
1143 y++;
1144 cy++;
1145
1146 for (; y < height; y++, cy++) {
1147 uint8_t *ydst, *udst, *vdst;
1148
1149 if (s->bitstream_bpp == 12) {
1150 while (2 * cy > y) {
1151 decode_gray_bitstream(s, width);
1152 ydst = p->data[0] + p->linesize[0] * y;
1153 s->llviddsp.add_median_pred(ydst, ydst - fake_ystride,
1154 s->temp[0], width,
1155 &lefty, &lefttopy);
1156 y++;
1157 }
1158 if (y >= height)
1159 break;
1160 }
1161 draw_slice(s, p, y);
1162
1163 decode_422_bitstream(s, width);
1164
1165 ydst = p->data[0] + p->linesize[0] * y;
1166 udst = p->data[1] + p->linesize[1] * cy;
1167 vdst = p->data[2] + p->linesize[2] * cy;
1168
1169 s->llviddsp.add_median_pred(ydst, ydst - fake_ystride,
1170 s->temp[0], width,
1171 &lefty, &lefttopy);
1172 if (!(s->flags & AV_CODEC_FLAG_GRAY)) {
1173 s->llviddsp.add_median_pred(udst, udst - fake_ustride, s->temp[1], width2, &leftu, &lefttopu);
1174 s->llviddsp.add_median_pred(vdst, vdst - fake_vstride, s->temp[2], width2, &leftv, &lefttopv);
1175 }
1176 }
1177
1178 draw_slice(s, p, height);
1179 break;
1180 }
1181 }
1182 } else {
1183 int y;
1184 uint8_t left[4];
1185 const int last_line = (height - 1) * p->linesize[0];
1186
1187 if (s->bitstream_bpp == 32) {
1188 left[A] = p->data[0][last_line + A] = get_bits(&s->gb, 8);
1189 left[R] = p->data[0][last_line + R] = get_bits(&s->gb, 8);
1190 left[G] = p->data[0][last_line + G] = get_bits(&s->gb, 8);
1191 left[B] = p->data[0][last_line + B] = get_bits(&s->gb, 8);
1192 } else {
1193 left[R] = p->data[0][last_line + R] = get_bits(&s->gb, 8);
1194 left[G] = p->data[0][last_line + G] = get_bits(&s->gb, 8);
1195 left[B] = p->data[0][last_line + B] = get_bits(&s->gb, 8);
1196 left[A] = p->data[0][last_line + A] = 255;
1197 skip_bits(&s->gb, 8);
1198 }
1199
1200 if (s->bgr32) {
1201 switch (s->predictor) {
1202 case LEFT:
1203 case PLANE:
1204 decode_bgr_bitstream(s, width - 1);
1205 s->hdsp.add_hfyu_left_pred_bgr32(p->data[0] + last_line + 4,
1206 s->temp[0], width - 1, left);
1207
1208 for (y = s->height - 2; y >= 0; y--) { // Yes it is stored upside down.
1209 decode_bgr_bitstream(s, width);
1210
1211 s->hdsp.add_hfyu_left_pred_bgr32(p->data[0] + p->linesize[0] * y,
1212 s->temp[0], width, left);
1213 if (s->predictor == PLANE) {
1214 if (s->bitstream_bpp != 32)
1215 left[A] = 0;
1216 if (y < s->height - 1 - s->interlaced) {
1217 s->llviddsp.add_bytes(p->data[0] + p->linesize[0] * y,
1218 p->data[0] + p->linesize[0] * y +
1219 fake_ystride, 4 * width);
1220 }
1221 }
1222 }
1223 // just 1 large slice as this is not possible in reverse order
1224 draw_slice(s, p, height);
1225 break;
1226 default:
1227 av_log(avctx, AV_LOG_ERROR,
1228 "prediction type not supported!\n");
1229 }
1230 } else {
1231 av_log(avctx, AV_LOG_ERROR,
1232 "BGR24 output is not implemented yet\n");
1233 return AVERROR_PATCHWELCOME;
1234 }
1235 }
1236 emms_c();
1237
1238 *got_frame = 1;
1239
1240 return (get_bits_count(&s->gb) + 31) / 32 * 4 + table_size;
1241}
1242
1243AVCodec ff_huffyuv_decoder = {
1244 .name = "huffyuv",
1245 .long_name = NULL_IF_CONFIG_SMALL("Huffyuv / HuffYUV"),
1246 .type = AVMEDIA_TYPE_VIDEO,
1247 .id = AV_CODEC_ID_HUFFYUV,
1248 .priv_data_size = sizeof(HYuvContext),
1249 .init = decode_init,
1250 .close = decode_end,
1251 .decode = decode_frame,
1252 .capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_DRAW_HORIZ_BAND |
1253 AV_CODEC_CAP_FRAME_THREADS,
1254 .init_thread_copy = ONLY_IF_THREADS_ENABLED(decode_init_thread_copy),
1255};
1256
1257#if CONFIG_FFVHUFF_DECODER
1258AVCodec ff_ffvhuff_decoder = {
1259 .name = "ffvhuff",
1260 .long_name = NULL_IF_CONFIG_SMALL("Huffyuv FFmpeg variant"),
1261 .type = AVMEDIA_TYPE_VIDEO,
1262 .id = AV_CODEC_ID_FFVHUFF,
1263 .priv_data_size = sizeof(HYuvContext),
1264 .init = decode_init,
1265 .close = decode_end,
1266 .decode = decode_frame,
1267 .capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_DRAW_HORIZ_BAND |
1268 AV_CODEC_CAP_FRAME_THREADS,
1269 .init_thread_copy = ONLY_IF_THREADS_ENABLED(decode_init_thread_copy),
1270};
1271#endif /* CONFIG_FFVHUFF_DECODER */
1272
generated by cgit at 2024-05-17 06:12:53 (GMT)