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Imported Debian version 2.5.0~trusty1.1
[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
f6fa7814
DM		 275static av_cold int decode_end(AVCodecContext *avctx)
276{
277 HYuvContext *s = avctx->priv_data;
278 int i;
279
280 ff_huffyuv_common_end(s);
281 av_freep(&s->bitstream_buffer);
282
283 for (i = 0; i < 8; i++)
284 ff_free_vlc(&s->vlc[i]);
285
286 return 0;
287}
288
2ba45a60
DM		 289static av_cold int decode_init(AVCodecContext *avctx)
290{
291 HYuvContext *s = avctx->priv_data;
292 int ret;
293
294 ff_huffyuvdsp_init(&s->hdsp);
295 memset(s->vlc, 0, 4 * sizeof(VLC));
296
297 s->interlaced = avctx->height > 288;
298 s->bgr32 = 1;
299
300 if (avctx->extradata_size) {
301 if ((avctx->bits_per_coded_sample & 7) &&
302 avctx->bits_per_coded_sample != 12)
303 s->version = 1; // do such files exist at all?
304 else if (avctx->extradata_size > 3 && avctx->extradata[3] == 0)
305 s->version = 2;
306 else
307 s->version = 3;
308 } else
309 s->version = 0;
310
311 s->bps = 8;
312 s->n = 1<<s->bps;
313 s->vlc_n = FFMIN(s->n, MAX_VLC_N);
314 s->chroma = 1;
315 if (s->version >= 2) {
316 int method, interlace;
317
318 if (avctx->extradata_size < 4)
319 return AVERROR_INVALIDDATA;
320
321 method = avctx->extradata[0];
322 s->decorrelate = method & 64 ? 1 : 0;
323 s->predictor = method & 63;
324 if (s->version == 2) {
325 s->bitstream_bpp = avctx->extradata[1];
326 if (s->bitstream_bpp == 0)
327 s->bitstream_bpp = avctx->bits_per_coded_sample & ~7;
328 } else {
329 s->bps = (avctx->extradata[1] >> 4) + 1;
330 s->n = 1<<s->bps;
331 s->vlc_n = FFMIN(s->n, MAX_VLC_N);
332 s->chroma_h_shift = avctx->extradata[1] & 3;
333 s->chroma_v_shift = (avctx->extradata[1] >> 2) & 3;
334 s->yuv = !!(avctx->extradata[2] & 1);
335 s->chroma= !!(avctx->extradata[2] & 3);
336 s->alpha = !!(avctx->extradata[2] & 4);
337 }
338 interlace = (avctx->extradata[2] & 0x30) >> 4;
339 s->interlaced = (interlace == 1) ? 1 : (interlace == 2) ? 0 : s->interlaced;
340 s->context = avctx->extradata[2] & 0x40 ? 1 : 0;
341
342 if ((ret = read_huffman_tables(s, avctx->extradata + 4,
343 avctx->extradata_size - 4)) < 0)
f6fa7814 344 goto error;
2ba45a60
DM		 345 } else {
346 switch (avctx->bits_per_coded_sample & 7) {
347 case 1:
348 s->predictor = LEFT;
349 s->decorrelate = 0;
350 break;
351 case 2:
352 s->predictor = LEFT;
353 s->decorrelate = 1;
354 break;
355 case 3:
356 s->predictor = PLANE;
357 s->decorrelate = avctx->bits_per_coded_sample >= 24;
358 break;
359 case 4:
360 s->predictor = MEDIAN;
361 s->decorrelate = 0;
362 break;
363 default:
364 s->predictor = LEFT; // OLD
365 s->decorrelate = 0;
366 break;
367 }
368 s->bitstream_bpp = avctx->bits_per_coded_sample & ~7;
369 s->context = 0;
370
371 if ((ret = read_old_huffman_tables(s)) < 0)
f6fa7814 372 goto error;
2ba45a60
DM		 373 }
374
375 if (s->version <= 2) {
376 switch (s->bitstream_bpp) {
377 case 12:
378 avctx->pix_fmt = AV_PIX_FMT_YUV420P;
379 s->yuv = 1;
380 break;
381 case 16:
382 if (s->yuy2)
383 avctx->pix_fmt = AV_PIX_FMT_YUYV422;
384 else
385 avctx->pix_fmt = AV_PIX_FMT_YUV422P;
386 s->yuv = 1;
387 break;
388 case 24:
389 if (s->bgr32)
390 avctx->pix_fmt = AV_PIX_FMT_0RGB32;
391 else
392 avctx->pix_fmt = AV_PIX_FMT_BGR24;
393 break;
394 case 32:
395 av_assert0(s->bgr32);
396 avctx->pix_fmt = AV_PIX_FMT_RGB32;
397 s->alpha = 1;
398 break;
399 default:
f6fa7814
DM		 400 ret = AVERROR_INVALIDDATA;
401 goto error;
2ba45a60
DM		 402 }
403 av_pix_fmt_get_chroma_sub_sample(avctx->pix_fmt,
404 &s->chroma_h_shift,
405 &s->chroma_v_shift);
406 } else {
407 switch ( (s->chroma<<10) | (s->yuv<<9) | (s->alpha<<8) | ((s->bps-1)<<4) | s->chroma_h_shift | (s->chroma_v_shift<<2)) {
408 case 0x070:
409 avctx->pix_fmt = AV_PIX_FMT_GRAY8;
410 break;
411 case 0x0F0:
412 avctx->pix_fmt = AV_PIX_FMT_GRAY16;
413 break;
414 case 0x170:
415 avctx->pix_fmt = AV_PIX_FMT_GRAY8A;
416 break;
417 case 0x470:
418 avctx->pix_fmt = AV_PIX_FMT_GBRP;
419 break;
420 case 0x480:
421 avctx->pix_fmt = AV_PIX_FMT_GBRP9;
422 break;
423 case 0x490:
424 avctx->pix_fmt = AV_PIX_FMT_GBRP10;
425 break;
426 case 0x4B0:
427 avctx->pix_fmt = AV_PIX_FMT_GBRP12;
428 break;
429 case 0x4D0:
430 avctx->pix_fmt = AV_PIX_FMT_GBRP14;
431 break;
432 case 0x4F0:
433 avctx->pix_fmt = AV_PIX_FMT_GBRP16;
434 break;
435 case 0x570:
436 avctx->pix_fmt = AV_PIX_FMT_GBRAP;
437 break;
438 case 0x670:
439 avctx->pix_fmt = AV_PIX_FMT_YUV444P;
440 break;
441 case 0x680:
442 avctx->pix_fmt = AV_PIX_FMT_YUV444P9;
443 break;
444 case 0x690:
445 avctx->pix_fmt = AV_PIX_FMT_YUV444P10;
446 break;
447 case 0x6B0:
448 avctx->pix_fmt = AV_PIX_FMT_YUV444P12;
449 break;
450 case 0x6D0:
451 avctx->pix_fmt = AV_PIX_FMT_YUV444P14;
452 break;
453 case 0x6F0:
454 avctx->pix_fmt = AV_PIX_FMT_YUV444P16;
455 break;
456 case 0x671:
457 avctx->pix_fmt = AV_PIX_FMT_YUV422P;
458 break;
459 case 0x681:
460 avctx->pix_fmt = AV_PIX_FMT_YUV422P9;
461 break;
462 case 0x691:
463 avctx->pix_fmt = AV_PIX_FMT_YUV422P10;
464 break;
465 case 0x6B1:
466 avctx->pix_fmt = AV_PIX_FMT_YUV422P12;
467 break;
468 case 0x6D1:
469 avctx->pix_fmt = AV_PIX_FMT_YUV422P14;
470 break;
471 case 0x6F1:
472 avctx->pix_fmt = AV_PIX_FMT_YUV422P16;
473 break;
474 case 0x672:
475 avctx->pix_fmt = AV_PIX_FMT_YUV411P;
476 break;
477 case 0x674:
478 avctx->pix_fmt = AV_PIX_FMT_YUV440P;
479 break;
480 case 0x675:
481 avctx->pix_fmt = AV_PIX_FMT_YUV420P;
482 break;
483 case 0x685:
484 avctx->pix_fmt = AV_PIX_FMT_YUV420P9;
485 break;
486 case 0x695:
487 avctx->pix_fmt = AV_PIX_FMT_YUV420P10;
488 break;
489 case 0x6B5:
490 avctx->pix_fmt = AV_PIX_FMT_YUV420P12;
491 break;
492 case 0x6D5:
493 avctx->pix_fmt = AV_PIX_FMT_YUV420P14;
494 break;
495 case 0x6F5:
496 avctx->pix_fmt = AV_PIX_FMT_YUV420P16;
497 break;
498 case 0x67A:
499 avctx->pix_fmt = AV_PIX_FMT_YUV410P;
500 break;
501 case 0x770:
502 avctx->pix_fmt = AV_PIX_FMT_YUVA444P;
503 break;
504 case 0x780:
505 avctx->pix_fmt = AV_PIX_FMT_YUVA444P9;
506 break;
507 case 0x790:
508 avctx->pix_fmt = AV_PIX_FMT_YUVA444P10;
509 break;
510 case 0x7F0:
511 avctx->pix_fmt = AV_PIX_FMT_YUVA444P16;
512 break;
513 case 0x771:
514 avctx->pix_fmt = AV_PIX_FMT_YUVA422P;
515 break;
516 case 0x781:
517 avctx->pix_fmt = AV_PIX_FMT_YUVA422P9;
518 break;
519 case 0x791:
520 avctx->pix_fmt = AV_PIX_FMT_YUVA422P10;
521 break;
522 case 0x7F1:
523 avctx->pix_fmt = AV_PIX_FMT_YUVA422P16;
524 break;
525 case 0x775:
526 avctx->pix_fmt = AV_PIX_FMT_YUVA420P;
527 break;
528 case 0x785:
529 avctx->pix_fmt = AV_PIX_FMT_YUVA420P9;
530 break;
531 case 0x795:
532 avctx->pix_fmt = AV_PIX_FMT_YUVA420P10;
533 break;
534 case 0x7F5:
535 avctx->pix_fmt = AV_PIX_FMT_YUVA420P16;
536 break;
537 default:
f6fa7814
DM		 538 ret = AVERROR_INVALIDDATA;
539 goto error;
2ba45a60
DM		 540 }
541 }
542
543 ff_huffyuv_common_init(avctx);
544
545 if ((avctx->pix_fmt == AV_PIX_FMT_YUV422P || avctx->pix_fmt == AV_PIX_FMT_YUV420P) && avctx->width & 1) {
546 av_log(avctx, AV_LOG_ERROR, "width must be even for this colorspace\n");
f6fa7814
DM		 547 ret = AVERROR_INVALIDDATA;
548 goto error;
2ba45a60
DM		 549 }
550 if (s->predictor == MEDIAN && avctx->pix_fmt == AV_PIX_FMT_YUV422P &&
551 avctx->width % 4) {
552 av_log(avctx, AV_LOG_ERROR, "width must be a multiple of 4 "
553 "for this combination of colorspace and predictor type.\n");
f6fa7814
DM		 554 ret = AVERROR_INVALIDDATA;
555 goto error;
2ba45a60
DM		 556 }
557
558 if ((ret = ff_huffyuv_alloc_temp(s)) < 0) {
559 ff_huffyuv_common_end(s);
f6fa7814 560 goto error;
2ba45a60
DM		 561 }
562
563 return 0;
f6fa7814
DM		 564 error:
565 decode_end(avctx);
566 return ret;
2ba45a60
DM		 567}
568
569static av_cold int decode_init_thread_copy(AVCodecContext *avctx)
570{
571 HYuvContext *s = avctx->priv_data;
572 int i, ret;
573
574 if ((ret = ff_huffyuv_alloc_temp(s)) < 0) {
575 ff_huffyuv_common_end(s);
576 return ret;
577 }
578
579 for (i = 0; i < 8; i++)
580 s->vlc[i].table = NULL;
581
582 if (s->version >= 2) {
583 if ((ret = read_huffman_tables(s, avctx->extradata + 4,
584 avctx->extradata_size)) < 0)
585 return ret;
586 } else {
587 if ((ret = read_old_huffman_tables(s)) < 0)
588 return ret;
589 }
590
591 return 0;
592}
593
594/** Subset of GET_VLC for use in hand-roller VLC code */
595#define VLC_INTERN(dst, table, gb, name, bits, max_depth) \
596 code = table[index][0]; \
597 n = table[index][1]; \
598 if (max_depth > 1 && n < 0) { \
599 LAST_SKIP_BITS(name, gb, bits); \
600 UPDATE_CACHE(name, gb); \
601 \
602 nb_bits = -n; \
603 index = SHOW_UBITS(name, gb, nb_bits) + code; \
604 code = table[index][0]; \
605 n = table[index][1]; \
606 if (max_depth > 2 && n < 0) { \
607 LAST_SKIP_BITS(name, gb, nb_bits); \
608 UPDATE_CACHE(name, gb); \
609 \
610 nb_bits = -n; \
611 index = SHOW_UBITS(name, gb, nb_bits) + code; \
612 code = table[index][0]; \
613 n = table[index][1]; \
614 } \
615 } \
616 dst = code; \
617 LAST_SKIP_BITS(name, gb, n)
618
619
620#define GET_VLC_DUAL(dst0, dst1, name, gb, dtable, table1, table2, \
621 bits, max_depth, OP) \
622 do { \
623 unsigned int index = SHOW_UBITS(name, gb, bits); \
624 int code, n = dtable[index][1]; \
625 \
626 if (n<=0) { \
627 int nb_bits; \
628 VLC_INTERN(dst0, table1, gb, name, bits, max_depth); \
629 \
630 UPDATE_CACHE(re, gb); \
631 index = SHOW_UBITS(name, gb, bits); \
632 VLC_INTERN(dst1, table2, gb, name, bits, max_depth); \
633 } else { \
634 code = dtable[index][0]; \
635 OP(dst0, dst1, code); \
636 LAST_SKIP_BITS(name, gb, n); \
637 } \
638 } while (0)
639
640#define OP8bits(dst0, dst1, code) dst0 = code>>8; dst1 = code
641
642#define READ_2PIX(dst0, dst1, plane1) \
643 UPDATE_CACHE(re, &s->gb); \
644 GET_VLC_DUAL(dst0, dst1, re, &s->gb, s->vlc[4+plane1].table, \
645 s->vlc[0].table, s->vlc[plane1].table, VLC_BITS, 3, OP8bits)
646
647static void decode_422_bitstream(HYuvContext *s, int count)
648{
649 int i, icount;
650 OPEN_READER(re, &s->gb);
651 count /= 2;
652
653 icount = get_bits_left(&s->gb) / (32 * 4);
654 if (count >= icount) {
655 for (i = 0; i < icount; i++) {
656 READ_2PIX(s->temp[0][2 * i], s->temp[1][i], 1);
657 READ_2PIX(s->temp[0][2 * i + 1], s->temp[2][i], 2);
658 }
659 for (; i < count && BITS_LEFT(re, &s->gb) > 0; i++) {
660 READ_2PIX(s->temp[0][2 * i ], s->temp[1][i], 1);
661 if (BITS_LEFT(re, &s->gb) <= 0) break;
662 READ_2PIX(s->temp[0][2 * i + 1], s->temp[2][i], 2);
663 }
664 for (; i < count; i++)
665 s->temp[0][2 * i ] = s->temp[1][i] =
666 s->temp[0][2 * i + 1] = s->temp[2][i] = 0;
667 } else {
668 for (i = 0; i < count; i++) {
669 READ_2PIX(s->temp[0][2 * i], s->temp[1][i], 1);
670 READ_2PIX(s->temp[0][2 * i + 1], s->temp[2][i], 2);
671 }
672 }
673 CLOSE_READER(re, &s->gb);
674}
675
676#define READ_2PIX_PLANE(dst0, dst1, plane, OP) \
677 UPDATE_CACHE(re, &s->gb); \
678 GET_VLC_DUAL(dst0, dst1, re, &s->gb, s->vlc[4+plane].table, \
679 s->vlc[plane].table, s->vlc[plane].table, VLC_BITS, 3, OP)
680
681#define OP14bits(dst0, dst1, code) dst0 = code>>8; dst1 = sign_extend(code, 8)
682
683/* TODO instead of restarting the read when the code isn't in the first level
684 * of the joint table, jump into the 2nd level of the individual table. */
685#define READ_2PIX_PLANE16(dst0, dst1, plane){\
686 dst0 = get_vlc2(&s->gb, s->vlc[plane].table, VLC_BITS, 3)<<2;\
687 dst0 += get_bits(&s->gb, 2);\
688 dst1 = get_vlc2(&s->gb, s->vlc[plane].table, VLC_BITS, 3)<<2;\
689 dst1 += get_bits(&s->gb, 2);\
690}
691static void decode_plane_bitstream(HYuvContext *s, int width, int plane)
692{
693 int i, count = width/2;
694
695 if (s->bps <= 8) {
696 OPEN_READER(re, &s->gb);
697 if (count >= (get_bits_left(&s->gb)) / (32 * 2)) {
698 for (i = 0; i < count && BITS_LEFT(re, &s->gb) > 0; i++) {
699 READ_2PIX_PLANE(s->temp[0][2 * i], s->temp[0][2 * i + 1], plane, OP8bits);
700 }
701 } else {
702 for(i=0; i<count; i++){
703 READ_2PIX_PLANE(s->temp[0][2 * i], s->temp[0][2 * i + 1], plane, OP8bits);
704 }
705 }
706 if( width&1 && BITS_LEFT(re, &s->gb)>0 ) {
707 unsigned int index;
708 int nb_bits, code, n;
709 UPDATE_CACHE(re, &s->gb);
710 index = SHOW_UBITS(re, &s->gb, VLC_BITS);
711 VLC_INTERN(s->temp[0][width-1], s->vlc[plane].table,
712 &s->gb, re, VLC_BITS, 3);
713 }
714 CLOSE_READER(re, &s->gb);
715 } else if (s->bps <= 14) {
716 OPEN_READER(re, &s->gb);
717 if (count >= (get_bits_left(&s->gb)) / (32 * 2)) {
718 for (i = 0; i < count && BITS_LEFT(re, &s->gb) > 0; i++) {
719 READ_2PIX_PLANE(s->temp16[0][2 * i], s->temp16[0][2 * i + 1], plane, OP14bits);
720 }
721 } else {
722 for(i=0; i<count; i++){
723 READ_2PIX_PLANE(s->temp16[0][2 * i], s->temp16[0][2 * i + 1], plane, OP14bits);
724 }
725 }
726 if( width&1 && BITS_LEFT(re, &s->gb)>0 ) {
727 unsigned int index;
728 int nb_bits, code, n;
729 UPDATE_CACHE(re, &s->gb);
730 index = SHOW_UBITS(re, &s->gb, VLC_BITS);
731 VLC_INTERN(s->temp16[0][width-1], s->vlc[plane].table,
732 &s->gb, re, VLC_BITS, 3);
733 }
734 CLOSE_READER(re, &s->gb);
735 } else {
736 if (count >= (get_bits_left(&s->gb)) / (32 * 2)) {
737 for (i = 0; i < count && get_bits_left(&s->gb) > 0; i++) {
738 READ_2PIX_PLANE16(s->temp16[0][2 * i], s->temp16[0][2 * i + 1], plane);
739 }
740 } else {
741 for(i=0; i<count; i++){
742 READ_2PIX_PLANE16(s->temp16[0][2 * i], s->temp16[0][2 * i + 1], plane);
743 }
744 }
745 if( width&1 && get_bits_left(&s->gb)>0 ) {
746 int dst = get_vlc2(&s->gb, s->vlc[plane].table, VLC_BITS, 3)<<2;
747 s->temp16[0][width-1] = dst + get_bits(&s->gb, 2);
748 }
749 }
750}
751
752static void decode_gray_bitstream(HYuvContext *s, int count)
753{
754 int i;
755 OPEN_READER(re, &s->gb);
756 count /= 2;
757
758 if (count >= (get_bits_left(&s->gb)) / (32 * 2)) {
759 for (i = 0; i < count && BITS_LEFT(re, &s->gb) > 0; i++) {
760 READ_2PIX(s->temp[0][2 * i], s->temp[0][2 * i + 1], 0);
761 }
762 } else {
763 for (i = 0; i < count; i++) {
764 READ_2PIX(s->temp[0][2 * i], s->temp[0][2 * i + 1], 0);
765 }
766 }
767 CLOSE_READER(re, &s->gb);
768}
769
770static av_always_inline void decode_bgr_1(HYuvContext *s, int count,
771 int decorrelate, int alpha)
772{
773 int i;
774 OPEN_READER(re, &s->gb);
775
776 for (i = 0; i < count && BITS_LEFT(re, &s->gb) > 0; i++) {
777 unsigned int index;
778 int code, n, nb_bits;
779
780 UPDATE_CACHE(re, &s->gb);
781 index = SHOW_UBITS(re, &s->gb, VLC_BITS);
782 n = s->vlc[4].table[index][1];
783
784 if (n>0) {
785 code = s->vlc[4].table[index][0];
786 *(uint32_t *) &s->temp[0][4 * i] = s->pix_bgr_map[code];
787 LAST_SKIP_BITS(re, &s->gb, n);
788 } else {
789 if (decorrelate) {
790 VLC_INTERN(s->temp[0][4 * i + G], s->vlc[1].table,
791 &s->gb, re, VLC_BITS, 3);
792
793 UPDATE_CACHE(re, &s->gb);
794 index = SHOW_UBITS(re, &s->gb, VLC_BITS);
795 VLC_INTERN(code, s->vlc[0].table, &s->gb, re, VLC_BITS, 3);
796 s->temp[0][4 * i + B] = code + s->temp[0][4 * i + G];
797
798 UPDATE_CACHE(re, &s->gb);
799 index = SHOW_UBITS(re, &s->gb, VLC_BITS);
800 VLC_INTERN(code, s->vlc[2].table, &s->gb, re, VLC_BITS, 3);
801 s->temp[0][4 * i + R] = code + s->temp[0][4 * i + G];
802 } else {
803 VLC_INTERN(s->temp[0][4 * i + B], s->vlc[0].table,
804 &s->gb, re, VLC_BITS, 3);
805
806 UPDATE_CACHE(re, &s->gb);
807 index = SHOW_UBITS(re, &s->gb, VLC_BITS);
808 VLC_INTERN(s->temp[0][4 * i + G], s->vlc[1].table,
809 &s->gb, re, VLC_BITS, 3);
810
811 UPDATE_CACHE(re, &s->gb);
812 index = SHOW_UBITS(re, &s->gb, VLC_BITS);
813 VLC_INTERN(s->temp[0][4 * i + R], s->vlc[2].table,
814 &s->gb, re, VLC_BITS, 3);
815 }
816 }
817 if (alpha) {
818 UPDATE_CACHE(re, &s->gb);
819 index = SHOW_UBITS(re, &s->gb, VLC_BITS);
820 VLC_INTERN(s->temp[0][4 * i + A], s->vlc[2].table,
821 &s->gb, re, VLC_BITS, 3);
822 } else
823 s->temp[0][4 * i + A] = 0;
824 }
825 CLOSE_READER(re, &s->gb);
826}
827
828static void decode_bgr_bitstream(HYuvContext *s, int count)
829{
830 if (s->decorrelate) {
831 if (s->bitstream_bpp == 24)
832 decode_bgr_1(s, count, 1, 0);
833 else
834 decode_bgr_1(s, count, 1, 1);
835 } else {
836 if (s->bitstream_bpp == 24)
837 decode_bgr_1(s, count, 0, 0);
838 else
839 decode_bgr_1(s, count, 0, 1);
840 }
841}
842
843static void draw_slice(HYuvContext *s, AVFrame *frame, int y)
844{
845 int h, cy, i;
846 int offset[AV_NUM_DATA_POINTERS];
847
848 if (!s->avctx->draw_horiz_band)
849 return;
850
851 h = y - s->last_slice_end;
852 y -= h;
853
854 if (s->bitstream_bpp == 12)
855 cy = y >> 1;
856 else
857 cy = y;
858
859 offset[0] = frame->linesize[0] * y;
860 offset[1] = frame->linesize[1] * cy;
861 offset[2] = frame->linesize[2] * cy;
862 for (i = 3; i < AV_NUM_DATA_POINTERS; i++)
863 offset[i] = 0;
864 emms_c();
865
866 s->avctx->draw_horiz_band(s->avctx, frame, offset, y, 3, h);
867
868 s->last_slice_end = y + h;
869}
870
871static int left_prediction(HYuvContext *s, uint8_t *dst, const uint8_t *src, int w, int acc)
872{
873 if (s->bps <= 8) {
874 return s->hdsp.add_hfyu_left_pred(dst, src, w, acc);
875 } else {
876 return s->llviddsp.add_hfyu_left_pred_int16(( uint16_t *)dst, (const uint16_t *)src, s->n-1, w, acc);
877 }
878}
879
880static void add_bytes(HYuvContext *s, uint8_t *dst, uint8_t *src, int w)
881{
882 if (s->bps <= 8) {
883 s->hdsp.add_bytes(dst, src, w);
884 } else {
885 s->llviddsp.add_int16((uint16_t*)dst, (const uint16_t*)src, s->n - 1, w);
886 }
887}
888
889static void add_median_prediction(HYuvContext *s, uint8_t *dst, const uint8_t *src, const uint8_t *diff, int w, int *left, int *left_top)
890{
891 if (s->bps <= 8) {
892 s->hdsp.add_hfyu_median_pred(dst, src, diff, w, left, left_top);
893 } else {
894 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);
895 }
896}
897static int decode_frame(AVCodecContext *avctx, void *data, int *got_frame,
898 AVPacket *avpkt)
899{
900 const uint8_t *buf = avpkt->data;
901 int buf_size = avpkt->size;
902 HYuvContext *s = avctx->priv_data;
903 const int width = s->width;
904 const int width2 = s->width >> 1;
905 const int height = s->height;
906 int fake_ystride, fake_ustride, fake_vstride;
907 ThreadFrame frame = { .f = data };
908 AVFrame *const p = data;
909 int table_size = 0, ret;
910
911 av_fast_padded_malloc(&s->bitstream_buffer,
912 &s->bitstream_buffer_size,
913 buf_size);
914 if (!s->bitstream_buffer)
915 return AVERROR(ENOMEM);
916
917 s->bdsp.bswap_buf((uint32_t *) s->bitstream_buffer,
918 (const uint32_t *) buf, buf_size / 4);
919
920 if ((ret = ff_thread_get_buffer(avctx, &frame, 0)) < 0)
921 return ret;
922
923 if (s->context) {
924 table_size = read_huffman_tables(s, s->bitstream_buffer, buf_size);
925 if (table_size < 0)
926 return table_size;
927 }
928
929 if ((unsigned) (buf_size - table_size) >= INT_MAX / 8)
930 return AVERROR_INVALIDDATA;
931
932 if ((ret = init_get_bits(&s->gb, s->bitstream_buffer + table_size,
933 (buf_size - table_size) * 8)) < 0)
934 return ret;
935
936 fake_ystride = s->interlaced ? p->linesize[0] * 2 : p->linesize[0];
937 fake_ustride = s->interlaced ? p->linesize[1] * 2 : p->linesize[1];
938 fake_vstride = s->interlaced ? p->linesize[2] * 2 : p->linesize[2];
939
940 s->last_slice_end = 0;
941
942 if (s->version > 2) {
943 int plane;
944 for(plane = 0; plane < 1 + 2*s->chroma + s->alpha; plane++) {
945 int left, lefttop, y;
946 int w = width;
947 int h = height;
948 int fake_stride = fake_ystride;
949
950 if (s->chroma && (plane == 1 || plane == 2)) {
951 w >>= s->chroma_h_shift;
952 h >>= s->chroma_v_shift;
953 fake_stride = plane == 1 ? fake_ustride : fake_vstride;
954 }
955
956 switch (s->predictor) {
957 case LEFT:
958 case PLANE:
959 decode_plane_bitstream(s, w, plane);
960 left = left_prediction(s, p->data[plane], s->temp[0], w, 0);
961
962 for (y = 1; y < h; y++) {
963 uint8_t *dst = p->data[plane] + p->linesize[plane]*y;
964
965 decode_plane_bitstream(s, w, plane);
966 left = left_prediction(s, dst, s->temp[0], w, left);
967 if (s->predictor == PLANE) {
968 if (y > s->interlaced) {
969 add_bytes(s, dst, dst - fake_stride, w);
970 }
971 }
972 }
973
974 break;
975 case MEDIAN:
976 decode_plane_bitstream(s, w, plane);
977 left= left_prediction(s, p->data[plane], s->temp[0], w, 0);
978
979 y = 1;
980
981 /* second line is left predicted for interlaced case */
982 if (s->interlaced) {
983 decode_plane_bitstream(s, w, plane);
984 left = left_prediction(s, p->data[plane] + p->linesize[plane], s->temp[0], w, left);
985 y++;
986 }
987
988 lefttop = p->data[plane][0];
989 decode_plane_bitstream(s, w, plane);
990 add_median_prediction(s, p->data[plane] + fake_stride, p->data[plane], s->temp[0], w, &left, &lefttop);
991 y++;
992
993 for (; y<h; y++) {
994 uint8_t *dst;
995
996 decode_plane_bitstream(s, w, plane);
997
998 dst = p->data[plane] + p->linesize[plane] * y;
999
1000 add_median_prediction(s, dst, dst - fake_stride, s->temp[0], w, &left, &lefttop);
1001 }
1002
1003 break;
1004 }
1005 }
1006 draw_slice(s, p, height);
1007 } else if (s->bitstream_bpp < 24) {
1008 int y, cy;
1009 int lefty, leftu, leftv;
1010 int lefttopy, lefttopu, lefttopv;
1011
1012 if (s->yuy2) {
1013 p->data[0][3] = get_bits(&s->gb, 8);
1014 p->data[0][2] = get_bits(&s->gb, 8);
1015 p->data[0][1] = get_bits(&s->gb, 8);
1016 p->data[0][0] = get_bits(&s->gb, 8);
1017
1018 av_log(avctx, AV_LOG_ERROR,
1019 "YUY2 output is not implemented yet\n");
1020 return AVERROR_PATCHWELCOME;
1021 } else {
1022 leftv =
1023 p->data[2][0] = get_bits(&s->gb, 8);
1024 lefty =
1025 p->data[0][1] = get_bits(&s->gb, 8);
1026 leftu =
1027 p->data[1][0] = get_bits(&s->gb, 8);
1028 p->data[0][0] = get_bits(&s->gb, 8);
1029
1030 switch (s->predictor) {
1031 case LEFT:
1032 case PLANE:
1033 decode_422_bitstream(s, width - 2);
1034 lefty = s->hdsp.add_hfyu_left_pred(p->data[0] + 2, s->temp[0],
1035 width - 2, lefty);
1036 if (!(s->flags & CODEC_FLAG_GRAY)) {
1037 leftu = s->hdsp.add_hfyu_left_pred(p->data[1] + 1, s->temp[1], width2 - 1, leftu);
1038 leftv = s->hdsp.add_hfyu_left_pred(p->data[2] + 1, s->temp[2], width2 - 1, leftv);
1039 }
1040
1041 for (cy = y = 1; y < s->height; y++, cy++) {
1042 uint8_t *ydst, *udst, *vdst;
1043
1044 if (s->bitstream_bpp == 12) {
1045 decode_gray_bitstream(s, width);
1046
1047 ydst = p->data[0] + p->linesize[0] * y;
1048
1049 lefty = s->hdsp.add_hfyu_left_pred(ydst, s->temp[0],
1050 width, lefty);
1051 if (s->predictor == PLANE) {
1052 if (y > s->interlaced)
1053 s->hdsp.add_bytes(ydst, ydst - fake_ystride, width);
1054 }
1055 y++;
1056 if (y >= s->height)
1057 break;
1058 }
1059
1060 draw_slice(s, p, y);
1061
1062 ydst = p->data[0] + p->linesize[0] * y;
1063 udst = p->data[1] + p->linesize[1] * cy;
1064 vdst = p->data[2] + p->linesize[2] * cy;
1065
1066 decode_422_bitstream(s, width);
1067 lefty = s->hdsp.add_hfyu_left_pred(ydst, s->temp[0],
1068 width, lefty);
1069 if (!(s->flags & CODEC_FLAG_GRAY)) {
1070 leftu = s->hdsp.add_hfyu_left_pred(udst, s->temp[1], width2, leftu);
1071 leftv = s->hdsp.add_hfyu_left_pred(vdst, s->temp[2], width2, leftv);
1072 }
1073 if (s->predictor == PLANE) {
1074 if (cy > s->interlaced) {
1075 s->hdsp.add_bytes(ydst, ydst - fake_ystride, width);
1076 if (!(s->flags & CODEC_FLAG_GRAY)) {
1077 s->hdsp.add_bytes(udst, udst - fake_ustride, width2);
1078 s->hdsp.add_bytes(vdst, vdst - fake_vstride, width2);
1079 }
1080 }
1081 }
1082 }
1083 draw_slice(s, p, height);
1084
1085 break;
1086 case MEDIAN:
1087 /* first line except first 2 pixels is left predicted */
1088 decode_422_bitstream(s, width - 2);
1089 lefty = s->hdsp.add_hfyu_left_pred(p->data[0] + 2, s->temp[0],
1090 width - 2, lefty);
1091 if (!(s->flags & CODEC_FLAG_GRAY)) {
1092 leftu = s->hdsp.add_hfyu_left_pred(p->data[1] + 1, s->temp[1], width2 - 1, leftu);
1093 leftv = s->hdsp.add_hfyu_left_pred(p->data[2] + 1, s->temp[2], width2 - 1, leftv);
1094 }
1095
1096 cy = y = 1;
1097
1098 /* second line is left predicted for interlaced case */
1099 if (s->interlaced) {
1100 decode_422_bitstream(s, width);
1101 lefty = s->hdsp.add_hfyu_left_pred(p->data[0] + p->linesize[0],
1102 s->temp[0], width, lefty);
1103 if (!(s->flags & CODEC_FLAG_GRAY)) {
1104 leftu = s->hdsp.add_hfyu_left_pred(p->data[1] + p->linesize[2], s->temp[1], width2, leftu);
1105 leftv = s->hdsp.add_hfyu_left_pred(p->data[2] + p->linesize[1], s->temp[2], width2, leftv);
1106 }
1107 y++;
1108 cy++;
1109 }
1110
1111 /* next 4 pixels are left predicted too */
1112 decode_422_bitstream(s, 4);
1113 lefty = s->hdsp.add_hfyu_left_pred(p->data[0] + fake_ystride,
1114 s->temp[0], 4, lefty);
1115 if (!(s->flags & CODEC_FLAG_GRAY)) {
1116 leftu = s->hdsp.add_hfyu_left_pred(p->data[1] + fake_ustride, s->temp[1], 2, leftu);
1117 leftv = s->hdsp.add_hfyu_left_pred(p->data[2] + fake_vstride, s->temp[2], 2, leftv);
1118 }
1119
1120 /* next line except the first 4 pixels is median predicted */
1121 lefttopy = p->data[0][3];
1122 decode_422_bitstream(s, width - 4);
1123 s->hdsp.add_hfyu_median_pred(p->data[0] + fake_ystride + 4,
1124 p->data[0] + 4, s->temp[0],
1125 width - 4, &lefty, &lefttopy);
1126 if (!(s->flags & CODEC_FLAG_GRAY)) {
1127 lefttopu = p->data[1][1];
1128 lefttopv = p->data[2][1];
1129 s->hdsp.add_hfyu_median_pred(p->data[1] + fake_ustride + 2, p->data[1] + 2, s->temp[1], width2 - 2, &leftu, &lefttopu);
1130 s->hdsp.add_hfyu_median_pred(p->data[2] + fake_vstride + 2, p->data[2] + 2, s->temp[2], width2 - 2, &leftv, &lefttopv);
1131 }
1132 y++;
1133 cy++;
1134
1135 for (; y < height; y++, cy++) {
1136 uint8_t *ydst, *udst, *vdst;
1137
1138 if (s->bitstream_bpp == 12) {
1139 while (2 * cy > y) {
1140 decode_gray_bitstream(s, width);
1141 ydst = p->data[0] + p->linesize[0] * y;
1142 s->hdsp.add_hfyu_median_pred(ydst, ydst - fake_ystride,
1143 s->temp[0], width,
1144 &lefty, &lefttopy);
1145 y++;
1146 }
1147 if (y >= height)
1148 break;
1149 }
1150 draw_slice(s, p, y);
1151
1152 decode_422_bitstream(s, width);
1153
1154 ydst = p->data[0] + p->linesize[0] * y;
1155 udst = p->data[1] + p->linesize[1] * cy;
1156 vdst = p->data[2] + p->linesize[2] * cy;
1157
1158 s->hdsp.add_hfyu_median_pred(ydst, ydst - fake_ystride,
1159 s->temp[0], width,
1160 &lefty, &lefttopy);
1161 if (!(s->flags & CODEC_FLAG_GRAY)) {
1162 s->hdsp.add_hfyu_median_pred(udst, udst - fake_ustride, s->temp[1], width2, &leftu, &lefttopu);
1163 s->hdsp.add_hfyu_median_pred(vdst, vdst - fake_vstride, s->temp[2], width2, &leftv, &lefttopv);
1164 }
1165 }
1166
1167 draw_slice(s, p, height);
1168 break;
1169 }
1170 }
1171 } else {
1172 int y;
1173 uint8_t left[4];
1174 const int last_line = (height - 1) * p->linesize[0];
1175
1176 if (s->bitstream_bpp == 32) {
1177 left[A] = p->data[0][last_line + A] = get_bits(&s->gb, 8);
1178 left[R] = p->data[0][last_line + R] = get_bits(&s->gb, 8);
1179 left[G] = p->data[0][last_line + G] = get_bits(&s->gb, 8);
1180 left[B] = p->data[0][last_line + B] = get_bits(&s->gb, 8);
1181 } else {
1182 left[R] = p->data[0][last_line + R] = get_bits(&s->gb, 8);
1183 left[G] = p->data[0][last_line + G] = get_bits(&s->gb, 8);
1184 left[B] = p->data[0][last_line + B] = get_bits(&s->gb, 8);
1185 left[A] = p->data[0][last_line + A] = 255;
1186 skip_bits(&s->gb, 8);
1187 }
1188
1189 if (s->bgr32) {
1190 switch (s->predictor) {
1191 case LEFT:
1192 case PLANE:
1193 decode_bgr_bitstream(s, width - 1);
1194 s->hdsp.add_hfyu_left_pred_bgr32(p->data[0] + last_line + 4,
1195 s->temp[0], width - 1, left);
1196
1197 for (y = s->height - 2; y >= 0; y--) { // Yes it is stored upside down.
1198 decode_bgr_bitstream(s, width);
1199
1200 s->hdsp.add_hfyu_left_pred_bgr32(p->data[0] + p->linesize[0] * y,
1201 s->temp[0], width, left);
1202 if (s->predictor == PLANE) {
1203 if (s->bitstream_bpp != 32)
1204 left[A] = 0;
f6fa7814 1205 if (y < s->height - 1 - s->interlaced) {
2ba45a60
DM		 1206 s->hdsp.add_bytes(p->data[0] + p->linesize[0] * y,
1207 p->data[0] + p->linesize[0] * y +
f6fa7814 1208 fake_ystride, 4 * width);
2ba45a60
DM		 1209 }
1210 }
1211 }
1212 // just 1 large slice as this is not possible in reverse order
1213 draw_slice(s, p, height);
1214 break;
1215 default:
1216 av_log(avctx, AV_LOG_ERROR,
1217 "prediction type not supported!\n");
1218 }
1219 } else {
1220 av_log(avctx, AV_LOG_ERROR,
1221 "BGR24 output is not implemented yet\n");
1222 return AVERROR_PATCHWELCOME;
1223 }
1224 }
1225 emms_c();
1226
1227 *got_frame = 1;
1228
1229 return (get_bits_count(&s->gb) + 31) / 32 * 4 + table_size;
1230}
1231
2ba45a60
DM		 1232AVCodec ff_huffyuv_decoder = {
1233 .name = "huffyuv",
1234 .long_name = NULL_IF_CONFIG_SMALL("Huffyuv / HuffYUV"),
1235 .type = AVMEDIA_TYPE_VIDEO,
1236 .id = AV_CODEC_ID_HUFFYUV,
1237 .priv_data_size = sizeof(HYuvContext),
1238 .init = decode_init,
1239 .close = decode_end,
1240 .decode = decode_frame,
1241 .capabilities = CODEC_CAP_DR1 | CODEC_CAP_DRAW_HORIZ_BAND |
1242 CODEC_CAP_FRAME_THREADS,
1243 .init_thread_copy = ONLY_IF_THREADS_ENABLED(decode_init_thread_copy),
1244};
1245
1246#if CONFIG_FFVHUFF_DECODER
1247AVCodec ff_ffvhuff_decoder = {
1248 .name = "ffvhuff",
1249 .long_name = NULL_IF_CONFIG_SMALL("Huffyuv FFmpeg variant"),
1250 .type = AVMEDIA_TYPE_VIDEO,
1251 .id = AV_CODEC_ID_FFVHUFF,
1252 .priv_data_size = sizeof(HYuvContext),
1253 .init = decode_init,
1254 .close = decode_end,
1255 .decode = decode_frame,
1256 .capabilities = CODEC_CAP_DR1 | CODEC_CAP_DRAW_HORIZ_BAND |
1257 CODEC_CAP_FRAME_THREADS,
1258 .init_thread_copy = ONLY_IF_THREADS_ENABLED(decode_init_thread_copy),
1259};
1260#endif /* CONFIG_FFVHUFF_DECODER */
ffmpeg Piment Noir Debian package repository