repositories / deb_ffmpeg.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
Imported Debian version 2.4.3~trusty1
[deb_ffmpeg.git] / ffmpeg / libavcodec / huffyuvdec.c
CommitLineData
2ba45a60
DM		 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 "thread.h"
40#include "libavutil/pixdesc.h"
41
42#define classic_shift_luma_table_size 42
43static const unsigned char classic_shift_luma[classic_shift_luma_table_size + FF_INPUT_BUFFER_PADDING_SIZE] = {
44 34, 36, 35, 69, 135, 232, 9, 16, 10, 24, 11, 23, 12, 16, 13, 10,
45 14, 8, 15, 8, 16, 8, 17, 20, 16, 10, 207, 206, 205, 236, 11, 8,
46 10, 21, 9, 23, 8, 8, 199, 70, 69, 68, 0,
47 0,0,0,0,0,0,0,0,
48};
49
50#define classic_shift_chroma_table_size 59
51static const unsigned char classic_shift_chroma[classic_shift_chroma_table_size + FF_INPUT_BUFFER_PADDING_SIZE] = {
52 66, 36, 37, 38, 39, 40, 41, 75, 76, 77, 110, 239, 144, 81, 82, 83,
53 84, 85, 118, 183, 56, 57, 88, 89, 56, 89, 154, 57, 58, 57, 26, 141,
54 57, 56, 58, 57, 58, 57, 184, 119, 214, 245, 116, 83, 82, 49, 80, 79,
55 78, 77, 44, 75, 41, 40, 39, 38, 37, 36, 34, 0,
56 0,0,0,0,0,0,0,0,
57};
58
59static const unsigned char classic_add_luma[256] = {
60 3, 9, 5, 12, 10, 35, 32, 29, 27, 50, 48, 45, 44, 41, 39, 37,
61 73, 70, 68, 65, 64, 61, 58, 56, 53, 50, 49, 46, 44, 41, 38, 36,
62 68, 65, 63, 61, 58, 55, 53, 51, 48, 46, 45, 43, 41, 39, 38, 36,
63 35, 33, 32, 30, 29, 27, 26, 25, 48, 47, 46, 44, 43, 41, 40, 39,
64 37, 36, 35, 34, 32, 31, 30, 28, 27, 26, 24, 23, 22, 20, 19, 37,
65 35, 34, 33, 31, 30, 29, 27, 26, 24, 23, 21, 20, 18, 17, 15, 29,
66 27, 26, 24, 22, 21, 19, 17, 16, 14, 26, 25, 23, 21, 19, 18, 16,
67 15, 27, 25, 23, 21, 19, 17, 16, 14, 26, 25, 23, 21, 18, 17, 14,
68 12, 17, 19, 13, 4, 9, 2, 11, 1, 7, 8, 0, 16, 3, 14, 6,
69 12, 10, 5, 15, 18, 11, 10, 13, 15, 16, 19, 20, 22, 24, 27, 15,
70 18, 20, 22, 24, 26, 14, 17, 20, 22, 24, 27, 15, 18, 20, 23, 25,
71 28, 16, 19, 22, 25, 28, 32, 36, 21, 25, 29, 33, 38, 42, 45, 49,
72 28, 31, 34, 37, 40, 42, 44, 47, 49, 50, 52, 54, 56, 57, 59, 60,
73 62, 64, 66, 67, 69, 35, 37, 39, 40, 42, 43, 45, 47, 48, 51, 52,
74 54, 55, 57, 59, 60, 62, 63, 66, 67, 69, 71, 72, 38, 40, 42, 43,
75 46, 47, 49, 51, 26, 28, 30, 31, 33, 34, 18, 19, 11, 13, 7, 8,
76};
77
78static const unsigned char classic_add_chroma[256] = {
79 3, 1, 2, 2, 2, 2, 3, 3, 7, 5, 7, 5, 8, 6, 11, 9,
80 7, 13, 11, 10, 9, 8, 7, 5, 9, 7, 6, 4, 7, 5, 8, 7,
81 11, 8, 13, 11, 19, 15, 22, 23, 20, 33, 32, 28, 27, 29, 51, 77,
82 43, 45, 76, 81, 46, 82, 75, 55, 56, 144, 58, 80, 60, 74, 147, 63,
83 143, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79,
84 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 27, 30, 21, 22,
85 17, 14, 5, 6, 100, 54, 47, 50, 51, 53, 106, 107, 108, 109, 110, 111,
86 112, 113, 114, 115, 4, 117, 118, 92, 94, 121, 122, 3, 124, 103, 2, 1,
87 0, 129, 130, 131, 120, 119, 126, 125, 136, 137, 138, 139, 140, 141, 142, 134,
88 135, 132, 133, 104, 64, 101, 62, 57, 102, 95, 93, 59, 61, 28, 97, 96,
89 52, 49, 48, 29, 32, 25, 24, 46, 23, 98, 45, 44, 43, 20, 42, 41,
90 19, 18, 99, 40, 15, 39, 38, 16, 13, 12, 11, 37, 10, 9, 8, 36,
91 7, 128, 127, 105, 123, 116, 35, 34, 33, 145, 31, 79, 42, 146, 78, 26,
92 83, 48, 49, 50, 44, 47, 26, 31, 30, 18, 17, 19, 21, 24, 25, 13,
93 14, 16, 17, 18, 20, 21, 12, 14, 15, 9, 10, 6, 9, 6, 5, 8,
94 6, 12, 8, 10, 7, 9, 6, 4, 6, 2, 2, 3, 3, 3, 3, 2,
95};
96
97static int read_len_table(uint8_t *dst, GetBitContext *gb, int n)
98{
99 int i, val, repeat;
100
101 for (i = 0; i < n;) {
102 repeat = get_bits(gb, 3);
103 val = get_bits(gb, 5);
104 if (repeat == 0)
105 repeat = get_bits(gb, 8);
106 if (i + repeat > n || get_bits_left(gb) < 0) {
107 av_log(NULL, AV_LOG_ERROR, "Error reading huffman table\n");
108 return AVERROR_INVALIDDATA;
109 }
110 while (repeat--)
111 dst[i++] = val;
112 }
113 return 0;
114}
115
116static int generate_joint_tables(HYuvContext *s)
117{
118 int ret;
119 uint16_t *symbols = av_mallocz(5 << VLC_BITS);
120 uint16_t *bits;
121 uint8_t *len;
122 if (!symbols)
123 return AVERROR(ENOMEM);
124 bits = symbols + (1 << VLC_BITS);
125 len = (uint8_t *)(bits + (1 << VLC_BITS));
126
127 if (s->bitstream_bpp < 24 || s->version > 2) {
128 int p, i, y, u;
129 for (p = 0; p < 4; p++) {
130 int p0 = s->version > 2 ? p : 0;
131 for (i = y = 0; y < s->vlc_n; y++) {
132 int len0 = s->len[p0][y];
133 int limit = VLC_BITS - len0;
134 if (limit <= 0 || !len0)
135 continue;
136 if ((sign_extend(y, 8) & (s->vlc_n-1)) != y)
137 continue;
138 for (u = 0; u < s->vlc_n; u++) {
139 int len1 = s->len[p][u];
140 if (len1 > limit || !len1)
141 continue;
142 if ((sign_extend(u, 8) & (s->vlc_n-1)) != u)
143 continue;
144 av_assert0(i < (1 << VLC_BITS));
145 len[i] = len0 + len1;
146 bits[i] = (s->bits[p0][y] << len1) + s->bits[p][u];
147 symbols[i] = (y << 8) + (u & 0xFF);
148 i++;
149 }
150 }
151 ff_free_vlc(&s->vlc[4 + p]);
152 if ((ret = ff_init_vlc_sparse(&s->vlc[4 + p], VLC_BITS, i, len, 1, 1,
153 bits, 2, 2, symbols, 2, 2, 0)) < 0)
154 goto out;
155 }
156 } else {
157 uint8_t (*map)[4] = (uint8_t(*)[4]) s->pix_bgr_map;
158 int i, b, g, r, code;
159 int p0 = s->decorrelate;
160 int p1 = !s->decorrelate;
161 /* Restrict the range to +/-16 because that's pretty much guaranteed
162 * to cover all the combinations that fit in 11 bits total, and it
163 * does not matter if we miss a few rare codes. */
164 for (i = 0, g = -16; g < 16; g++) {
165 int len0 = s->len[p0][g & 255];
166 int limit0 = VLC_BITS - len0;
167 if (limit0 < 2 || !len0)
168 continue;
169 for (b = -16; b < 16; b++) {
170 int len1 = s->len[p1][b & 255];
171 int limit1 = limit0 - len1;
172 if (limit1 < 1 || !len1)
173 continue;
174 code = (s->bits[p0][g & 255] << len1) + s->bits[p1][b & 255];
175 for (r = -16; r < 16; r++) {
176 int len2 = s->len[2][r & 255];
177 if (len2 > limit1 || !len2)
178 continue;
179 av_assert0(i < (1 << VLC_BITS));
180 len[i] = len0 + len1 + len2;
181 bits[i] = (code << len2) + s->bits[2][r & 255];
182 if (s->decorrelate) {
183 map[i][G] = g;
184 map[i][B] = g + b;
185 map[i][R] = g + r;
186 } else {
187 map[i][B] = g;
188 map[i][G] = b;
189 map[i][R] = r;
190 }
191 i++;
192 }
193 }
194 }
195 ff_free_vlc(&s->vlc[4]);
196 if ((ret = init_vlc(&s->vlc[4], VLC_BITS, i, len, 1, 1,
197 bits, 2, 2, 0)) < 0)
198 goto out;
199 }
200 ret = 0;
201out:
202 av_freep(&symbols);
203 return ret;
204}
205
206static int read_huffman_tables(HYuvContext *s, const uint8_t *src, int length)
207{
208 GetBitContext gb;
209 int i, ret;
210 int count = 3;
211
212 if ((ret = init_get_bits(&gb, src, length * 8)) < 0)
213 return ret;
214
215 if (s->version > 2)
216 count = 1 + s->alpha + 2*s->chroma;
217
218 for (i = 0; i < count; i++) {
219 if ((ret = read_len_table(s->len[i], &gb, s->vlc_n)) < 0)
220 return ret;
221 if ((ret = ff_huffyuv_generate_bits_table(s->bits[i], s->len[i], s->vlc_n)) < 0)
222 return ret;
223 ff_free_vlc(&s->vlc[i]);
224 if ((ret = init_vlc(&s->vlc[i], VLC_BITS, s->vlc_n, s->len[i], 1, 1,
225 s->bits[i], 4, 4, 0)) < 0)
226 return ret;
227 }
228
229 if ((ret = generate_joint_tables(s)) < 0)
230 return ret;
231
232 return (get_bits_count(&gb) + 7) / 8;
233}
234
235static int read_old_huffman_tables(HYuvContext *s)
236{
237 GetBitContext gb;
238 int i, ret;
239
240 init_get_bits(&gb, classic_shift_luma,
241 classic_shift_luma_table_size * 8);
242 if ((ret = read_len_table(s->len[0], &gb, 256)) < 0)
243 return ret;
244
245 init_get_bits(&gb, classic_shift_chroma,
246 classic_shift_chroma_table_size * 8);
247 if ((ret = read_len_table(s->len[1], &gb, 256)) < 0)
248 return ret;
249
250 for (i = 0; i < 256; i++)
251 s->bits[0][i] = classic_add_luma[i];
252 for (i = 0; i < 256; i++)
253 s->bits[1][i] = classic_add_chroma[i];
254
255 if (s->bitstream_bpp >= 24) {
256 memcpy(s->bits[1], s->bits[0], 256 * sizeof(uint32_t));
257 memcpy(s->len[1], s->len[0], 256 * sizeof(uint8_t));
258 }
259 memcpy(s->bits[2], s->bits[1], 256 * sizeof(uint32_t));
260 memcpy(s->len[2], s->len[1], 256 * sizeof(uint8_t));
261
262 for (i = 0; i < 4; i++) {
263 ff_free_vlc(&s->vlc[i]);
264 if ((ret = init_vlc(&s->vlc[i], VLC_BITS, 256, s->len[i], 1, 1,
265 s->bits[i], 4, 4, 0)) < 0)
266 return ret;
267 }
268
269 if ((ret = generate_joint_tables(s)) < 0)
270 return ret;
271
272 return 0;
273}
274
275static av_cold int decode_init(AVCodecContext *avctx)
276{
277 HYuvContext *s = avctx->priv_data;
278 int ret;
279
280 ff_huffyuvdsp_init(&s->hdsp);
281 memset(s->vlc, 0, 4 * sizeof(VLC));
282
283 s->interlaced = avctx->height > 288;
284 s->bgr32 = 1;
285
286 if (avctx->extradata_size) {
287 if ((avctx->bits_per_coded_sample & 7) &&
288 avctx->bits_per_coded_sample != 12)
289 s->version = 1; // do such files exist at all?
290 else if (avctx->extradata_size > 3 && avctx->extradata[3] == 0)
291 s->version = 2;
292 else
293 s->version = 3;
294 } else
295 s->version = 0;
296
297 s->bps = 8;
298 s->n = 1<<s->bps;
299 s->vlc_n = FFMIN(s->n, MAX_VLC_N);
300 s->chroma = 1;
301 if (s->version >= 2) {
302 int method, interlace;
303
304 if (avctx->extradata_size < 4)
305 return AVERROR_INVALIDDATA;
306
307 method = avctx->extradata[0];
308 s->decorrelate = method & 64 ? 1 : 0;
309 s->predictor = method & 63;
310 if (s->version == 2) {
311 s->bitstream_bpp = avctx->extradata[1];
312 if (s->bitstream_bpp == 0)
313 s->bitstream_bpp = avctx->bits_per_coded_sample & ~7;
314 } else {
315 s->bps = (avctx->extradata[1] >> 4) + 1;
316 s->n = 1<<s->bps;
317 s->vlc_n = FFMIN(s->n, MAX_VLC_N);
318 s->chroma_h_shift = avctx->extradata[1] & 3;
319 s->chroma_v_shift = (avctx->extradata[1] >> 2) & 3;
320 s->yuv = !!(avctx->extradata[2] & 1);
321 s->chroma= !!(avctx->extradata[2] & 3);
322 s->alpha = !!(avctx->extradata[2] & 4);
323 }
324 interlace = (avctx->extradata[2] & 0x30) >> 4;
325 s->interlaced = (interlace == 1) ? 1 : (interlace == 2) ? 0 : s->interlaced;
326 s->context = avctx->extradata[2] & 0x40 ? 1 : 0;
327
328 if ((ret = read_huffman_tables(s, avctx->extradata + 4,
329 avctx->extradata_size - 4)) < 0)
330 return ret;
331 } else {
332 switch (avctx->bits_per_coded_sample & 7) {
333 case 1:
334 s->predictor = LEFT;
335 s->decorrelate = 0;
336 break;
337 case 2:
338 s->predictor = LEFT;
339 s->decorrelate = 1;
340 break;
341 case 3:
342 s->predictor = PLANE;
343 s->decorrelate = avctx->bits_per_coded_sample >= 24;
344 break;
345 case 4:
346 s->predictor = MEDIAN;
347 s->decorrelate = 0;
348 break;
349 default:
350 s->predictor = LEFT; // OLD
351 s->decorrelate = 0;
352 break;
353 }
354 s->bitstream_bpp = avctx->bits_per_coded_sample & ~7;
355 s->context = 0;
356
357 if ((ret = read_old_huffman_tables(s)) < 0)
358 return ret;
359 }
360
361 if (s->version <= 2) {
362 switch (s->bitstream_bpp) {
363 case 12:
364 avctx->pix_fmt = AV_PIX_FMT_YUV420P;
365 s->yuv = 1;
366 break;
367 case 16:
368 if (s->yuy2)
369 avctx->pix_fmt = AV_PIX_FMT_YUYV422;
370 else
371 avctx->pix_fmt = AV_PIX_FMT_YUV422P;
372 s->yuv = 1;
373 break;
374 case 24:
375 if (s->bgr32)
376 avctx->pix_fmt = AV_PIX_FMT_0RGB32;
377 else
378 avctx->pix_fmt = AV_PIX_FMT_BGR24;
379 break;
380 case 32:
381 av_assert0(s->bgr32);
382 avctx->pix_fmt = AV_PIX_FMT_RGB32;
383 s->alpha = 1;
384 break;
385 default:
386 return AVERROR_INVALIDDATA;
387 }
388 av_pix_fmt_get_chroma_sub_sample(avctx->pix_fmt,
389 &s->chroma_h_shift,
390 &s->chroma_v_shift);
391 } else {
392 switch ( (s->chroma<<10) | (s->yuv<<9) | (s->alpha<<8) | ((s->bps-1)<<4) | s->chroma_h_shift | (s->chroma_v_shift<<2)) {
393 case 0x070:
394 avctx->pix_fmt = AV_PIX_FMT_GRAY8;
395 break;
396 case 0x0F0:
397 avctx->pix_fmt = AV_PIX_FMT_GRAY16;
398 break;
399 case 0x170:
400 avctx->pix_fmt = AV_PIX_FMT_GRAY8A;
401 break;
402 case 0x470:
403 avctx->pix_fmt = AV_PIX_FMT_GBRP;
404 break;
405 case 0x480:
406 avctx->pix_fmt = AV_PIX_FMT_GBRP9;
407 break;
408 case 0x490:
409 avctx->pix_fmt = AV_PIX_FMT_GBRP10;
410 break;
411 case 0x4B0:
412 avctx->pix_fmt = AV_PIX_FMT_GBRP12;
413 break;
414 case 0x4D0:
415 avctx->pix_fmt = AV_PIX_FMT_GBRP14;
416 break;
417 case 0x4F0:
418 avctx->pix_fmt = AV_PIX_FMT_GBRP16;
419 break;
420 case 0x570:
421 avctx->pix_fmt = AV_PIX_FMT_GBRAP;
422 break;
423 case 0x670:
424 avctx->pix_fmt = AV_PIX_FMT_YUV444P;
425 break;
426 case 0x680:
427 avctx->pix_fmt = AV_PIX_FMT_YUV444P9;
428 break;
429 case 0x690:
430 avctx->pix_fmt = AV_PIX_FMT_YUV444P10;
431 break;
432 case 0x6B0:
433 avctx->pix_fmt = AV_PIX_FMT_YUV444P12;
434 break;
435 case 0x6D0:
436 avctx->pix_fmt = AV_PIX_FMT_YUV444P14;
437 break;
438 case 0x6F0:
439 avctx->pix_fmt = AV_PIX_FMT_YUV444P16;
440 break;
441 case 0x671:
442 avctx->pix_fmt = AV_PIX_FMT_YUV422P;
443 break;
444 case 0x681:
445 avctx->pix_fmt = AV_PIX_FMT_YUV422P9;
446 break;
447 case 0x691:
448 avctx->pix_fmt = AV_PIX_FMT_YUV422P10;
449 break;
450 case 0x6B1:
451 avctx->pix_fmt = AV_PIX_FMT_YUV422P12;
452 break;
453 case 0x6D1:
454 avctx->pix_fmt = AV_PIX_FMT_YUV422P14;
455 break;
456 case 0x6F1:
457 avctx->pix_fmt = AV_PIX_FMT_YUV422P16;
458 break;
459 case 0x672:
460 avctx->pix_fmt = AV_PIX_FMT_YUV411P;
461 break;
462 case 0x674:
463 avctx->pix_fmt = AV_PIX_FMT_YUV440P;
464 break;
465 case 0x675:
466 avctx->pix_fmt = AV_PIX_FMT_YUV420P;
467 break;
468 case 0x685:
469 avctx->pix_fmt = AV_PIX_FMT_YUV420P9;
470 break;
471 case 0x695:
472 avctx->pix_fmt = AV_PIX_FMT_YUV420P10;
473 break;
474 case 0x6B5:
475 avctx->pix_fmt = AV_PIX_FMT_YUV420P12;
476 break;
477 case 0x6D5:
478 avctx->pix_fmt = AV_PIX_FMT_YUV420P14;
479 break;
480 case 0x6F5:
481 avctx->pix_fmt = AV_PIX_FMT_YUV420P16;
482 break;
483 case 0x67A:
484 avctx->pix_fmt = AV_PIX_FMT_YUV410P;
485 break;
486 case 0x770:
487 avctx->pix_fmt = AV_PIX_FMT_YUVA444P;
488 break;
489 case 0x780:
490 avctx->pix_fmt = AV_PIX_FMT_YUVA444P9;
491 break;
492 case 0x790:
493 avctx->pix_fmt = AV_PIX_FMT_YUVA444P10;
494 break;
495 case 0x7F0:
496 avctx->pix_fmt = AV_PIX_FMT_YUVA444P16;
497 break;
498 case 0x771:
499 avctx->pix_fmt = AV_PIX_FMT_YUVA422P;
500 break;
501 case 0x781:
502 avctx->pix_fmt = AV_PIX_FMT_YUVA422P9;
503 break;
504 case 0x791:
505 avctx->pix_fmt = AV_PIX_FMT_YUVA422P10;
506 break;
507 case 0x7F1:
508 avctx->pix_fmt = AV_PIX_FMT_YUVA422P16;
509 break;
510 case 0x775:
511 avctx->pix_fmt = AV_PIX_FMT_YUVA420P;
512 break;
513 case 0x785:
514 avctx->pix_fmt = AV_PIX_FMT_YUVA420P9;
515 break;
516 case 0x795:
517 avctx->pix_fmt = AV_PIX_FMT_YUVA420P10;
518 break;
519 case 0x7F5:
520 avctx->pix_fmt = AV_PIX_FMT_YUVA420P16;
521 break;
522 default:
523 return AVERROR_INVALIDDATA;
524 }
525 }
526
527 ff_huffyuv_common_init(avctx);
528
529 if ((avctx->pix_fmt == AV_PIX_FMT_YUV422P || avctx->pix_fmt == AV_PIX_FMT_YUV420P) && avctx->width & 1) {
530 av_log(avctx, AV_LOG_ERROR, "width must be even for this colorspace\n");
531 return AVERROR_INVALIDDATA;
532 }
533 if (s->predictor == MEDIAN && avctx->pix_fmt == AV_PIX_FMT_YUV422P &&
534 avctx->width % 4) {
535 av_log(avctx, AV_LOG_ERROR, "width must be a multiple of 4 "
536 "for this combination of colorspace and predictor type.\n");
537 return AVERROR_INVALIDDATA;
538 }
539
540 if ((ret = ff_huffyuv_alloc_temp(s)) < 0) {
541 ff_huffyuv_common_end(s);
542 return ret;
543 }
544
545 return 0;
546}
547
548static av_cold int decode_init_thread_copy(AVCodecContext *avctx)
549{
550 HYuvContext *s = avctx->priv_data;
551 int i, ret;
552
553 if ((ret = ff_huffyuv_alloc_temp(s)) < 0) {
554 ff_huffyuv_common_end(s);
555 return ret;
556 }
557
558 for (i = 0; i < 8; i++)
559 s->vlc[i].table = NULL;
560
561 if (s->version >= 2) {
562 if ((ret = read_huffman_tables(s, avctx->extradata + 4,
563 avctx->extradata_size)) < 0)
564 return ret;
565 } else {
566 if ((ret = read_old_huffman_tables(s)) < 0)
567 return ret;
568 }
569
570 return 0;
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
626static 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}
670static 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
731static 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
749static 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
807static 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
822static 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
850static 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->hdsp.add_hfyu_left_pred(dst, src, w, acc);
854 } else {
855 return s->llviddsp.add_hfyu_left_pred_int16(( uint16_t *)dst, (const uint16_t *)src, s->n-1, w, acc);
856 }
857}
858
859static void add_bytes(HYuvContext *s, uint8_t *dst, uint8_t *src, int w)
860{
861 if (s->bps <= 8) {
862 s->hdsp.add_bytes(dst, src, w);
863 } else {
864 s->llviddsp.add_int16((uint16_t*)dst, (const uint16_t*)src, s->n - 1, w);
865 }
866}
867
868static 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->hdsp.add_hfyu_median_pred(dst, src, diff, w, left, left_top);
872 } else {
873 s->llviddsp.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}
876static int decode_frame(AVCodecContext *avctx, void *data, int *got_frame,
877 AVPacket *avpkt)
878{
879 const uint8_t *buf = avpkt->data;
880 int buf_size = avpkt->size;
881 HYuvContext *s = avctx->priv_data;
882 const int width = s->width;
883 const int width2 = s->width >> 1;
884 const int height = s->height;
885 int fake_ystride, fake_ustride, fake_vstride;
886 ThreadFrame frame = { .f = data };
887 AVFrame *const p = data;
888 int table_size = 0, ret;
889
890 av_fast_padded_malloc(&s->bitstream_buffer,
891 &s->bitstream_buffer_size,
892 buf_size);
893 if (!s->bitstream_buffer)
894 return AVERROR(ENOMEM);
895
896 s->bdsp.bswap_buf((uint32_t *) s->bitstream_buffer,
897 (const uint32_t *) buf, buf_size / 4);
898
899 if ((ret = ff_thread_get_buffer(avctx, &frame, 0)) < 0)
900 return ret;
901
902 if (s->context) {
903 table_size = read_huffman_tables(s, s->bitstream_buffer, buf_size);
904 if (table_size < 0)
905 return table_size;
906 }
907
908 if ((unsigned) (buf_size - table_size) >= INT_MAX / 8)
909 return AVERROR_INVALIDDATA;
910
911 if ((ret = init_get_bits(&s->gb, s->bitstream_buffer + table_size,
912 (buf_size - table_size) * 8)) < 0)
913 return ret;
914
915 fake_ystride = s->interlaced ? p->linesize[0] * 2 : p->linesize[0];
916 fake_ustride = s->interlaced ? p->linesize[1] * 2 : p->linesize[1];
917 fake_vstride = s->interlaced ? p->linesize[2] * 2 : p->linesize[2];
918
919 s->last_slice_end = 0;
920
921 if (s->version > 2) {
922 int plane;
923 for(plane = 0; plane < 1 + 2*s->chroma + s->alpha; plane++) {
924 int left, lefttop, y;
925 int w = width;
926 int h = height;
927 int fake_stride = fake_ystride;
928
929 if (s->chroma && (plane == 1 || plane == 2)) {
930 w >>= s->chroma_h_shift;
931 h >>= s->chroma_v_shift;
932 fake_stride = plane == 1 ? fake_ustride : fake_vstride;
933 }
934
935 switch (s->predictor) {
936 case LEFT:
937 case PLANE:
938 decode_plane_bitstream(s, w, plane);
939 left = left_prediction(s, p->data[plane], s->temp[0], w, 0);
940
941 for (y = 1; y < h; y++) {
942 uint8_t *dst = p->data[plane] + p->linesize[plane]*y;
943
944 decode_plane_bitstream(s, w, plane);
945 left = left_prediction(s, dst, s->temp[0], w, left);
946 if (s->predictor == PLANE) {
947 if (y > s->interlaced) {
948 add_bytes(s, dst, dst - fake_stride, w);
949 }
950 }
951 }
952
953 break;
954 case MEDIAN:
955 decode_plane_bitstream(s, w, plane);
956 left= left_prediction(s, p->data[plane], s->temp[0], w, 0);
957
958 y = 1;
959
960 /* second line is left predicted for interlaced case */
961 if (s->interlaced) {
962 decode_plane_bitstream(s, w, plane);
963 left = left_prediction(s, p->data[plane] + p->linesize[plane], s->temp[0], w, left);
964 y++;
965 }
966
967 lefttop = p->data[plane][0];
968 decode_plane_bitstream(s, w, plane);
969 add_median_prediction(s, p->data[plane] + fake_stride, p->data[plane], s->temp[0], w, &left, &lefttop);
970 y++;
971
972 for (; y<h; y++) {
973 uint8_t *dst;
974
975 decode_plane_bitstream(s, w, plane);
976
977 dst = p->data[plane] + p->linesize[plane] * y;
978
979 add_median_prediction(s, dst, dst - fake_stride, s->temp[0], w, &left, &lefttop);
980 }
981
982 break;
983 }
984 }
985 draw_slice(s, p, height);
986 } else if (s->bitstream_bpp < 24) {
987 int y, cy;
988 int lefty, leftu, leftv;
989 int lefttopy, lefttopu, lefttopv;
990
991 if (s->yuy2) {
992 p->data[0][3] = get_bits(&s->gb, 8);
993 p->data[0][2] = get_bits(&s->gb, 8);
994 p->data[0][1] = get_bits(&s->gb, 8);
995 p->data[0][0] = get_bits(&s->gb, 8);
996
997 av_log(avctx, AV_LOG_ERROR,
998 "YUY2 output is not implemented yet\n");
999 return AVERROR_PATCHWELCOME;
1000 } else {
1001 leftv =
1002 p->data[2][0] = get_bits(&s->gb, 8);
1003 lefty =
1004 p->data[0][1] = get_bits(&s->gb, 8);
1005 leftu =
1006 p->data[1][0] = get_bits(&s->gb, 8);
1007 p->data[0][0] = get_bits(&s->gb, 8);
1008
1009 switch (s->predictor) {
1010 case LEFT:
1011 case PLANE:
1012 decode_422_bitstream(s, width - 2);
1013 lefty = s->hdsp.add_hfyu_left_pred(p->data[0] + 2, s->temp[0],
1014 width - 2, lefty);
1015 if (!(s->flags & CODEC_FLAG_GRAY)) {
1016 leftu = s->hdsp.add_hfyu_left_pred(p->data[1] + 1, s->temp[1], width2 - 1, leftu);
1017 leftv = s->hdsp.add_hfyu_left_pred(p->data[2] + 1, s->temp[2], width2 - 1, leftv);
1018 }
1019
1020 for (cy = y = 1; y < s->height; y++, cy++) {
1021 uint8_t *ydst, *udst, *vdst;
1022
1023 if (s->bitstream_bpp == 12) {
1024 decode_gray_bitstream(s, width);
1025
1026 ydst = p->data[0] + p->linesize[0] * y;
1027
1028 lefty = s->hdsp.add_hfyu_left_pred(ydst, s->temp[0],
1029 width, lefty);
1030 if (s->predictor == PLANE) {
1031 if (y > s->interlaced)
1032 s->hdsp.add_bytes(ydst, ydst - fake_ystride, width);
1033 }
1034 y++;
1035 if (y >= s->height)
1036 break;
1037 }
1038
1039 draw_slice(s, p, y);
1040
1041 ydst = p->data[0] + p->linesize[0] * y;
1042 udst = p->data[1] + p->linesize[1] * cy;
1043 vdst = p->data[2] + p->linesize[2] * cy;
1044
1045 decode_422_bitstream(s, width);
1046 lefty = s->hdsp.add_hfyu_left_pred(ydst, s->temp[0],
1047 width, lefty);
1048 if (!(s->flags & CODEC_FLAG_GRAY)) {
1049 leftu = s->hdsp.add_hfyu_left_pred(udst, s->temp[1], width2, leftu);
1050 leftv = s->hdsp.add_hfyu_left_pred(vdst, s->temp[2], width2, leftv);
1051 }
1052 if (s->predictor == PLANE) {
1053 if (cy > s->interlaced) {
1054 s->hdsp.add_bytes(ydst, ydst - fake_ystride, width);
1055 if (!(s->flags & CODEC_FLAG_GRAY)) {
1056 s->hdsp.add_bytes(udst, udst - fake_ustride, width2);
1057 s->hdsp.add_bytes(vdst, vdst - fake_vstride, width2);
1058 }
1059 }
1060 }
1061 }
1062 draw_slice(s, p, height);
1063
1064 break;
1065 case MEDIAN:
1066 /* first line except first 2 pixels is left predicted */
1067 decode_422_bitstream(s, width - 2);
1068 lefty = s->hdsp.add_hfyu_left_pred(p->data[0] + 2, s->temp[0],
1069 width - 2, lefty);
1070 if (!(s->flags & CODEC_FLAG_GRAY)) {
1071 leftu = s->hdsp.add_hfyu_left_pred(p->data[1] + 1, s->temp[1], width2 - 1, leftu);
1072 leftv = s->hdsp.add_hfyu_left_pred(p->data[2] + 1, s->temp[2], width2 - 1, leftv);
1073 }
1074
1075 cy = y = 1;
1076
1077 /* second line is left predicted for interlaced case */
1078 if (s->interlaced) {
1079 decode_422_bitstream(s, width);
1080 lefty = s->hdsp.add_hfyu_left_pred(p->data[0] + p->linesize[0],
1081 s->temp[0], width, lefty);
1082 if (!(s->flags & CODEC_FLAG_GRAY)) {
1083 leftu = s->hdsp.add_hfyu_left_pred(p->data[1] + p->linesize[2], s->temp[1], width2, leftu);
1084 leftv = s->hdsp.add_hfyu_left_pred(p->data[2] + p->linesize[1], s->temp[2], width2, leftv);
1085 }
1086 y++;
1087 cy++;
1088 }
1089
1090 /* next 4 pixels are left predicted too */
1091 decode_422_bitstream(s, 4);
1092 lefty = s->hdsp.add_hfyu_left_pred(p->data[0] + fake_ystride,
1093 s->temp[0], 4, lefty);
1094 if (!(s->flags & CODEC_FLAG_GRAY)) {
1095 leftu = s->hdsp.add_hfyu_left_pred(p->data[1] + fake_ustride, s->temp[1], 2, leftu);
1096 leftv = s->hdsp.add_hfyu_left_pred(p->data[2] + fake_vstride, s->temp[2], 2, leftv);
1097 }
1098
1099 /* next line except the first 4 pixels is median predicted */
1100 lefttopy = p->data[0][3];
1101 decode_422_bitstream(s, width - 4);
1102 s->hdsp.add_hfyu_median_pred(p->data[0] + fake_ystride + 4,
1103 p->data[0] + 4, s->temp[0],
1104 width - 4, &lefty, &lefttopy);
1105 if (!(s->flags & CODEC_FLAG_GRAY)) {
1106 lefttopu = p->data[1][1];
1107 lefttopv = p->data[2][1];
1108 s->hdsp.add_hfyu_median_pred(p->data[1] + fake_ustride + 2, p->data[1] + 2, s->temp[1], width2 - 2, &leftu, &lefttopu);
1109 s->hdsp.add_hfyu_median_pred(p->data[2] + fake_vstride + 2, p->data[2] + 2, s->temp[2], width2 - 2, &leftv, &lefttopv);
1110 }
1111 y++;
1112 cy++;
1113
1114 for (; y < height; y++, cy++) {
1115 uint8_t *ydst, *udst, *vdst;
1116
1117 if (s->bitstream_bpp == 12) {
1118 while (2 * cy > y) {
1119 decode_gray_bitstream(s, width);
1120 ydst = p->data[0] + p->linesize[0] * y;
1121 s->hdsp.add_hfyu_median_pred(ydst, ydst - fake_ystride,
1122 s->temp[0], width,
1123 &lefty, &lefttopy);
1124 y++;
1125 }
1126 if (y >= height)
1127 break;
1128 }
1129 draw_slice(s, p, y);
1130
1131 decode_422_bitstream(s, width);
1132
1133 ydst = p->data[0] + p->linesize[0] * y;
1134 udst = p->data[1] + p->linesize[1] * cy;
1135 vdst = p->data[2] + p->linesize[2] * cy;
1136
1137 s->hdsp.add_hfyu_median_pred(ydst, ydst - fake_ystride,
1138 s->temp[0], width,
1139 &lefty, &lefttopy);
1140 if (!(s->flags & CODEC_FLAG_GRAY)) {
1141 s->hdsp.add_hfyu_median_pred(udst, udst - fake_ustride, s->temp[1], width2, &leftu, &lefttopu);
1142 s->hdsp.add_hfyu_median_pred(vdst, vdst - fake_vstride, s->temp[2], width2, &leftv, &lefttopv);
1143 }
1144 }
1145
1146 draw_slice(s, p, height);
1147 break;
1148 }
1149 }
1150 } else {
1151 int y;
1152 uint8_t left[4];
1153 const int last_line = (height - 1) * p->linesize[0];
1154
1155 if (s->bitstream_bpp == 32) {
1156 left[A] = p->data[0][last_line + A] = get_bits(&s->gb, 8);
1157 left[R] = p->data[0][last_line + R] = get_bits(&s->gb, 8);
1158 left[G] = p->data[0][last_line + G] = get_bits(&s->gb, 8);
1159 left[B] = p->data[0][last_line + B] = get_bits(&s->gb, 8);
1160 } else {
1161 left[R] = p->data[0][last_line + R] = get_bits(&s->gb, 8);
1162 left[G] = p->data[0][last_line + G] = get_bits(&s->gb, 8);
1163 left[B] = p->data[0][last_line + B] = get_bits(&s->gb, 8);
1164 left[A] = p->data[0][last_line + A] = 255;
1165 skip_bits(&s->gb, 8);
1166 }
1167
1168 if (s->bgr32) {
1169 switch (s->predictor) {
1170 case LEFT:
1171 case PLANE:
1172 decode_bgr_bitstream(s, width - 1);
1173 s->hdsp.add_hfyu_left_pred_bgr32(p->data[0] + last_line + 4,
1174 s->temp[0], width - 1, left);
1175
1176 for (y = s->height - 2; y >= 0; y--) { // Yes it is stored upside down.
1177 decode_bgr_bitstream(s, width);
1178
1179 s->hdsp.add_hfyu_left_pred_bgr32(p->data[0] + p->linesize[0] * y,
1180 s->temp[0], width, left);
1181 if (s->predictor == PLANE) {
1182 if (s->bitstream_bpp != 32)
1183 left[A] = 0;
1184 if ((y & s->interlaced) == 0 &&
1185 y < s->height - 1 - s->interlaced) {
1186 s->hdsp.add_bytes(p->data[0] + p->linesize[0] * y,
1187 p->data[0] + p->linesize[0] * y +
1188 fake_ystride, fake_ystride);
1189 }
1190 }
1191 }
1192 // just 1 large slice as this is not possible in reverse order
1193 draw_slice(s, p, height);
1194 break;
1195 default:
1196 av_log(avctx, AV_LOG_ERROR,
1197 "prediction type not supported!\n");
1198 }
1199 } else {
1200 av_log(avctx, AV_LOG_ERROR,
1201 "BGR24 output is not implemented yet\n");
1202 return AVERROR_PATCHWELCOME;
1203 }
1204 }
1205 emms_c();
1206
1207 *got_frame = 1;
1208
1209 return (get_bits_count(&s->gb) + 31) / 32 * 4 + table_size;
1210}
1211
1212static av_cold int decode_end(AVCodecContext *avctx)
1213{
1214 HYuvContext *s = avctx->priv_data;
1215 int i;
1216
1217 ff_huffyuv_common_end(s);
1218 av_freep(&s->bitstream_buffer);
1219
1220 for (i = 0; i < 8; i++)
1221 ff_free_vlc(&s->vlc[i]);
1222
1223 return 0;
1224}
1225
1226AVCodec ff_huffyuv_decoder = {
1227 .name = "huffyuv",
1228 .long_name = NULL_IF_CONFIG_SMALL("Huffyuv / HuffYUV"),
1229 .type = AVMEDIA_TYPE_VIDEO,
1230 .id = AV_CODEC_ID_HUFFYUV,
1231 .priv_data_size = sizeof(HYuvContext),
1232 .init = decode_init,
1233 .close = decode_end,
1234 .decode = decode_frame,
1235 .capabilities = CODEC_CAP_DR1 | CODEC_CAP_DRAW_HORIZ_BAND |
1236 CODEC_CAP_FRAME_THREADS,
1237 .init_thread_copy = ONLY_IF_THREADS_ENABLED(decode_init_thread_copy),
1238};
1239
1240#if CONFIG_FFVHUFF_DECODER
1241AVCodec ff_ffvhuff_decoder = {
1242 .name = "ffvhuff",
1243 .long_name = NULL_IF_CONFIG_SMALL("Huffyuv FFmpeg variant"),
1244 .type = AVMEDIA_TYPE_VIDEO,
1245 .id = AV_CODEC_ID_FFVHUFF,
1246 .priv_data_size = sizeof(HYuvContext),
1247 .init = decode_init,
1248 .close = decode_end,
1249 .decode = decode_frame,
1250 .capabilities = CODEC_CAP_DR1 | CODEC_CAP_DRAW_HORIZ_BAND |
1251 CODEC_CAP_FRAME_THREADS,
1252 .init_thread_copy = ONLY_IF_THREADS_ENABLED(decode_init_thread_copy),
1253};
1254#endif /* CONFIG_FFVHUFF_DECODER */
ffmpeg Piment Noir Debian package repository