4 * Copyright (c) 2002-2014 Michael Niedermayer <michaelni@gmx.at>
6 * see http://www.pcisys.net/~melanson/codecs/huffyuv.txt for a description of
9 * This file is part of FFmpeg.
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.
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.
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
25 * yuva, gray, 4:4:4, 4:1:1, 4:1:0 and >8 bit per sample support sponsored by NOA
33 #define UNCHECKED_BITSTREAM_READER 1
38 #include "huffyuvdsp.h"
39 #include "lossless_videodsp.h"
41 #include "libavutil/imgutils.h"
42 #include "libavutil/pixdesc.h"
44 #define classic_shift_luma_table_size 42
45 static const unsigned char classic_shift_luma[classic_shift_luma_table_size + AV_INPUT_BUFFER_PADDING_SIZE] = {
46 34, 36, 35, 69, 135, 232, 9, 16, 10, 24, 11, 23, 12, 16, 13, 10,
47 14, 8, 15, 8, 16, 8, 17, 20, 16, 10, 207, 206, 205, 236, 11, 8,
48 10, 21, 9, 23, 8, 8, 199, 70, 69, 68, 0,
52 #define classic_shift_chroma_table_size 59
53 static const unsigned char classic_shift_chroma[classic_shift_chroma_table_size + AV_INPUT_BUFFER_PADDING_SIZE] = {
54 66, 36, 37, 38, 39, 40, 41, 75, 76, 77, 110, 239, 144, 81, 82, 83,
55 84, 85, 118, 183, 56, 57, 88, 89, 56, 89, 154, 57, 58, 57, 26, 141,
56 57, 56, 58, 57, 58, 57, 184, 119, 214, 245, 116, 83, 82, 49, 80, 79,
57 78, 77, 44, 75, 41, 40, 39, 38, 37, 36, 34, 0,
61 static const unsigned char classic_add_luma[256] = {
62 3, 9, 5, 12, 10, 35, 32, 29, 27, 50, 48, 45, 44, 41, 39, 37,
63 73, 70, 68, 65, 64, 61, 58, 56, 53, 50, 49, 46, 44, 41, 38, 36,
64 68, 65, 63, 61, 58, 55, 53, 51, 48, 46, 45, 43, 41, 39, 38, 36,
65 35, 33, 32, 30, 29, 27, 26, 25, 48, 47, 46, 44, 43, 41, 40, 39,
66 37, 36, 35, 34, 32, 31, 30, 28, 27, 26, 24, 23, 22, 20, 19, 37,
67 35, 34, 33, 31, 30, 29, 27, 26, 24, 23, 21, 20, 18, 17, 15, 29,
68 27, 26, 24, 22, 21, 19, 17, 16, 14, 26, 25, 23, 21, 19, 18, 16,
69 15, 27, 25, 23, 21, 19, 17, 16, 14, 26, 25, 23, 21, 18, 17, 14,
70 12, 17, 19, 13, 4, 9, 2, 11, 1, 7, 8, 0, 16, 3, 14, 6,
71 12, 10, 5, 15, 18, 11, 10, 13, 15, 16, 19, 20, 22, 24, 27, 15,
72 18, 20, 22, 24, 26, 14, 17, 20, 22, 24, 27, 15, 18, 20, 23, 25,
73 28, 16, 19, 22, 25, 28, 32, 36, 21, 25, 29, 33, 38, 42, 45, 49,
74 28, 31, 34, 37, 40, 42, 44, 47, 49, 50, 52, 54, 56, 57, 59, 60,
75 62, 64, 66, 67, 69, 35, 37, 39, 40, 42, 43, 45, 47, 48, 51, 52,
76 54, 55, 57, 59, 60, 62, 63, 66, 67, 69, 71, 72, 38, 40, 42, 43,
77 46, 47, 49, 51, 26, 28, 30, 31, 33, 34, 18, 19, 11, 13, 7, 8,
80 static const unsigned char classic_add_chroma[256] = {
81 3, 1, 2, 2, 2, 2, 3, 3, 7, 5, 7, 5, 8, 6, 11, 9,
82 7, 13, 11, 10, 9, 8, 7, 5, 9, 7, 6, 4, 7, 5, 8, 7,
83 11, 8, 13, 11, 19, 15, 22, 23, 20, 33, 32, 28, 27, 29, 51, 77,
84 43, 45, 76, 81, 46, 82, 75, 55, 56, 144, 58, 80, 60, 74, 147, 63,
85 143, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79,
86 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 27, 30, 21, 22,
87 17, 14, 5, 6, 100, 54, 47, 50, 51, 53, 106, 107, 108, 109, 110, 111,
88 112, 113, 114, 115, 4, 117, 118, 92, 94, 121, 122, 3, 124, 103, 2, 1,
89 0, 129, 130, 131, 120, 119, 126, 125, 136, 137, 138, 139, 140, 141, 142, 134,
90 135, 132, 133, 104, 64, 101, 62, 57, 102, 95, 93, 59, 61, 28, 97, 96,
91 52, 49, 48, 29, 32, 25, 24, 46, 23, 98, 45, 44, 43, 20, 42, 41,
92 19, 18, 99, 40, 15, 39, 38, 16, 13, 12, 11, 37, 10, 9, 8, 36,
93 7, 128, 127, 105, 123, 116, 35, 34, 33, 145, 31, 79, 42, 146, 78, 26,
94 83, 48, 49, 50, 44, 47, 26, 31, 30, 18, 17, 19, 21, 24, 25, 13,
95 14, 16, 17, 18, 20, 21, 12, 14, 15, 9, 10, 6, 9, 6, 5, 8,
96 6, 12, 8, 10, 7, 9, 6, 4, 6, 2, 2, 3, 3, 3, 3, 2,
99 static int read_len_table(uint8_t *dst, GetBitContext *gb, int n)
103 for (i = 0; i < n;) {
104 repeat = get_bits(gb, 3);
105 val = get_bits(gb, 5);
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;
118 static int generate_joint_tables(HYuvContext *s)
121 uint16_t *symbols = av_mallocz(5 << VLC_BITS);
125 return AVERROR(ENOMEM);
126 bits = symbols + (1 << VLC_BITS);
127 len = (uint8_t *)(bits + (1 << VLC_BITS));
129 if (s->bitstream_bpp < 24 || s->version > 2) {
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)
138 if ((sign_extend(y, 8) & (s->vlc_n-1)) != y)
140 for (u = 0; u < s->vlc_n; u++) {
141 int len1 = s->len[p][u];
142 if (len1 > limit || !len1)
144 if ((sign_extend(u, 8) & (s->vlc_n-1)) != u)
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);
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)
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)
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)
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)
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) {
197 ff_free_vlc(&s->vlc[4]);
198 if ((ret = init_vlc(&s->vlc[4], VLC_BITS, i, len, 1, 1,
208 static int read_huffman_tables(HYuvContext *s, const uint8_t *src, int length)
214 if ((ret = init_get_bits(&gb, src, length * 8)) < 0)
218 count = 1 + s->alpha + 2*s->chroma;
220 for (i = 0; i < count; i++) {
221 if ((ret = read_len_table(s->len[i], &gb, s->vlc_n)) < 0)
223 if ((ret = ff_huffyuv_generate_bits_table(s->bits[i], s->len[i], s->vlc_n)) < 0)
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)
231 if ((ret = generate_joint_tables(s)) < 0)
234 return (get_bits_count(&gb) + 7) / 8;
237 static int read_old_huffman_tables(HYuvContext *s)
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)
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)
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];
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));
261 memcpy(s->bits[2], s->bits[1], 256 * sizeof(uint32_t));
262 memcpy(s->len[2], s->len[1], 256 * sizeof(uint8_t));
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)
271 if ((ret = generate_joint_tables(s)) < 0)
277 static av_cold int decode_end(AVCodecContext *avctx)
279 HYuvContext *s = avctx->priv_data;
282 ff_huffyuv_common_end(s);
283 av_freep(&s->bitstream_buffer);
285 for (i = 0; i < 8; i++)
286 ff_free_vlc(&s->vlc[i]);
291 static av_cold int decode_init(AVCodecContext *avctx)
293 HYuvContext *s = avctx->priv_data;
296 ret = av_image_check_size(avctx->width, avctx->height, 0, avctx);
300 ff_huffyuvdsp_init(&s->hdsp, avctx->pix_fmt);
301 ff_llviddsp_init(&s->llviddsp);
302 memset(s->vlc, 0, 4 * sizeof(VLC));
304 s->interlaced = avctx->height > 288;
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)
320 s->vlc_n = FFMIN(s->n, MAX_VLC_N);
322 if (s->version >= 2) {
323 int method, interlace;
325 if (avctx->extradata_size < 4)
326 return AVERROR_INVALIDDATA;
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;
336 s->bps = (avctx->extradata[1] >> 4) + 1;
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);
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;
349 if ((ret = read_huffman_tables(s, avctx->extradata + 4,
350 avctx->extradata_size - 4)) < 0)
353 switch (avctx->bits_per_coded_sample & 7) {
363 s->predictor = PLANE;
364 s->decorrelate = avctx->bits_per_coded_sample >= 24;
367 s->predictor = MEDIAN;
371 s->predictor = LEFT; // OLD
375 s->bitstream_bpp = avctx->bits_per_coded_sample & ~7;
378 if ((ret = read_old_huffman_tables(s)) < 0)
382 if (s->version <= 2) {
383 switch (s->bitstream_bpp) {
385 avctx->pix_fmt = AV_PIX_FMT_YUV420P;
390 avctx->pix_fmt = AV_PIX_FMT_YUYV422;
392 avctx->pix_fmt = AV_PIX_FMT_YUV422P;
397 avctx->pix_fmt = AV_PIX_FMT_0RGB32;
399 avctx->pix_fmt = AV_PIX_FMT_BGR24;
402 av_assert0(s->bgr32);
403 avctx->pix_fmt = AV_PIX_FMT_RGB32;
407 ret = AVERROR_INVALIDDATA;
410 av_pix_fmt_get_chroma_sub_sample(avctx->pix_fmt,
414 switch ( (s->chroma<<10) | (s->yuv<<9) | (s->alpha<<8) | ((s->bps-1)<<4) | s->chroma_h_shift | (s->chroma_v_shift<<2)) {
416 avctx->pix_fmt = AV_PIX_FMT_GRAY8;
419 avctx->pix_fmt = AV_PIX_FMT_GRAY16;
422 avctx->pix_fmt = AV_PIX_FMT_GRAY8A;
425 avctx->pix_fmt = AV_PIX_FMT_GBRP;
428 avctx->pix_fmt = AV_PIX_FMT_GBRP9;
431 avctx->pix_fmt = AV_PIX_FMT_GBRP10;
434 avctx->pix_fmt = AV_PIX_FMT_GBRP12;
437 avctx->pix_fmt = AV_PIX_FMT_GBRP14;
440 avctx->pix_fmt = AV_PIX_FMT_GBRP16;
443 avctx->pix_fmt = AV_PIX_FMT_GBRAP;
446 avctx->pix_fmt = AV_PIX_FMT_YUV444P;
449 avctx->pix_fmt = AV_PIX_FMT_YUV444P9;
452 avctx->pix_fmt = AV_PIX_FMT_YUV444P10;
455 avctx->pix_fmt = AV_PIX_FMT_YUV444P12;
458 avctx->pix_fmt = AV_PIX_FMT_YUV444P14;
461 avctx->pix_fmt = AV_PIX_FMT_YUV444P16;
464 avctx->pix_fmt = AV_PIX_FMT_YUV422P;
467 avctx->pix_fmt = AV_PIX_FMT_YUV422P9;
470 avctx->pix_fmt = AV_PIX_FMT_YUV422P10;
473 avctx->pix_fmt = AV_PIX_FMT_YUV422P12;
476 avctx->pix_fmt = AV_PIX_FMT_YUV422P14;
479 avctx->pix_fmt = AV_PIX_FMT_YUV422P16;
482 avctx->pix_fmt = AV_PIX_FMT_YUV411P;
485 avctx->pix_fmt = AV_PIX_FMT_YUV440P;
488 avctx->pix_fmt = AV_PIX_FMT_YUV420P;
491 avctx->pix_fmt = AV_PIX_FMT_YUV420P9;
494 avctx->pix_fmt = AV_PIX_FMT_YUV420P10;
497 avctx->pix_fmt = AV_PIX_FMT_YUV420P12;
500 avctx->pix_fmt = AV_PIX_FMT_YUV420P14;
503 avctx->pix_fmt = AV_PIX_FMT_YUV420P16;
506 avctx->pix_fmt = AV_PIX_FMT_YUV410P;
509 avctx->pix_fmt = AV_PIX_FMT_YUVA444P;
512 avctx->pix_fmt = AV_PIX_FMT_YUVA444P9;
515 avctx->pix_fmt = AV_PIX_FMT_YUVA444P10;
518 avctx->pix_fmt = AV_PIX_FMT_YUVA444P16;
521 avctx->pix_fmt = AV_PIX_FMT_YUVA422P;
524 avctx->pix_fmt = AV_PIX_FMT_YUVA422P9;
527 avctx->pix_fmt = AV_PIX_FMT_YUVA422P10;
530 avctx->pix_fmt = AV_PIX_FMT_YUVA422P16;
533 avctx->pix_fmt = AV_PIX_FMT_YUVA420P;
536 avctx->pix_fmt = AV_PIX_FMT_YUVA420P9;
539 avctx->pix_fmt = AV_PIX_FMT_YUVA420P10;
542 avctx->pix_fmt = AV_PIX_FMT_YUVA420P16;
545 ret = AVERROR_INVALIDDATA;
550 ff_huffyuv_common_init(avctx);
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;
557 if (s->predictor == MEDIAN && avctx->pix_fmt == AV_PIX_FMT_YUV422P &&
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;
565 if ((ret = ff_huffyuv_alloc_temp(s)) < 0) {
566 ff_huffyuv_common_end(s);
577 static av_cold int decode_init_thread_copy(AVCodecContext *avctx)
579 HYuvContext *s = avctx->priv_data;
582 if ((ret = ff_huffyuv_alloc_temp(s)) < 0) {
583 ff_huffyuv_common_end(s);
587 for (i = 0; i < 8; i++)
588 s->vlc[i].table = NULL;
590 if (s->version >= 2) {
591 if ((ret = read_huffman_tables(s, avctx->extradata + 4,
592 avctx->extradata_size)) < 0)
595 if ((ret = read_old_huffman_tables(s)) < 0)
603 /** Subset of GET_VLC for use in hand-roller VLC code */
604 #define VLC_INTERN(dst, table, gb, name, bits, max_depth) \
605 code = table[index][0]; \
606 n = table[index][1]; \
607 if (max_depth > 1 && n < 0) { \
608 LAST_SKIP_BITS(name, gb, bits); \
609 UPDATE_CACHE(name, gb); \
612 index = SHOW_UBITS(name, gb, nb_bits) + code; \
613 code = table[index][0]; \
614 n = table[index][1]; \
615 if (max_depth > 2 && n < 0) { \
616 LAST_SKIP_BITS(name, gb, nb_bits); \
617 UPDATE_CACHE(name, gb); \
620 index = SHOW_UBITS(name, gb, nb_bits) + code; \
621 code = table[index][0]; \
622 n = table[index][1]; \
626 LAST_SKIP_BITS(name, gb, n)
629 #define GET_VLC_DUAL(dst0, dst1, name, gb, dtable, table1, table2, \
630 bits, max_depth, OP) \
632 unsigned int index = SHOW_UBITS(name, gb, bits); \
633 int code, n = dtable[index][1]; \
637 VLC_INTERN(dst0, table1, gb, name, bits, max_depth); \
639 UPDATE_CACHE(re, gb); \
640 index = SHOW_UBITS(name, gb, bits); \
641 VLC_INTERN(dst1, table2, gb, name, bits, max_depth); \
643 code = dtable[index][0]; \
644 OP(dst0, dst1, code); \
645 LAST_SKIP_BITS(name, gb, n); \
649 #define OP8bits(dst0, dst1, code) dst0 = code>>8; dst1 = code
651 #define READ_2PIX(dst0, dst1, plane1) \
652 UPDATE_CACHE(re, &s->gb); \
653 GET_VLC_DUAL(dst0, dst1, re, &s->gb, s->vlc[4+plane1].table, \
654 s->vlc[0].table, s->vlc[plane1].table, VLC_BITS, 3, OP8bits)
656 static void decode_422_bitstream(HYuvContext *s, int count)
659 OPEN_READER(re, &s->gb);
662 icount = get_bits_left(&s->gb) / (32 * 4);
663 if (count >= icount) {
664 for (i = 0; i < icount; i++) {
665 READ_2PIX(s->temp[0][2 * i], s->temp[1][i], 1);
666 READ_2PIX(s->temp[0][2 * i + 1], s->temp[2][i], 2);
668 for (; i < count && BITS_LEFT(re, &s->gb) > 0; i++) {
669 READ_2PIX(s->temp[0][2 * i ], s->temp[1][i], 1);
670 if (BITS_LEFT(re, &s->gb) <= 0) break;
671 READ_2PIX(s->temp[0][2 * i + 1], s->temp[2][i], 2);
673 for (; i < count; i++)
674 s->temp[0][2 * i ] = s->temp[1][i] =
675 s->temp[0][2 * i + 1] = s->temp[2][i] = 0;
677 for (i = 0; i < count; i++) {
678 READ_2PIX(s->temp[0][2 * i], s->temp[1][i], 1);
679 READ_2PIX(s->temp[0][2 * i + 1], s->temp[2][i], 2);
682 CLOSE_READER(re, &s->gb);
685 #define READ_2PIX_PLANE(dst0, dst1, plane, OP) \
686 UPDATE_CACHE(re, &s->gb); \
687 GET_VLC_DUAL(dst0, dst1, re, &s->gb, s->vlc[4+plane].table, \
688 s->vlc[plane].table, s->vlc[plane].table, VLC_BITS, 3, OP)
690 #define OP14bits(dst0, dst1, code) dst0 = code>>8; dst1 = sign_extend(code, 8)
692 /* TODO instead of restarting the read when the code isn't in the first level
693 * of the joint table, jump into the 2nd level of the individual table. */
694 #define READ_2PIX_PLANE16(dst0, dst1, plane){\
695 dst0 = get_vlc2(&s->gb, s->vlc[plane].table, VLC_BITS, 3)<<2;\
696 dst0 += get_bits(&s->gb, 2);\
697 dst1 = get_vlc2(&s->gb, s->vlc[plane].table, VLC_BITS, 3)<<2;\
698 dst1 += get_bits(&s->gb, 2);\
700 static void decode_plane_bitstream(HYuvContext *s, int width, int plane)
702 int i, count = width/2;
705 OPEN_READER(re, &s->gb);
706 if (count >= (get_bits_left(&s->gb)) / (32 * 2)) {
707 for (i = 0; i < count && BITS_LEFT(re, &s->gb) > 0; i++) {
708 READ_2PIX_PLANE(s->temp[0][2 * i], s->temp[0][2 * i + 1], plane, OP8bits);
711 for(i=0; i<count; i++){
712 READ_2PIX_PLANE(s->temp[0][2 * i], s->temp[0][2 * i + 1], plane, OP8bits);
715 if( width&1 && BITS_LEFT(re, &s->gb)>0 ) {
717 int nb_bits, code, n;
718 UPDATE_CACHE(re, &s->gb);
719 index = SHOW_UBITS(re, &s->gb, VLC_BITS);
720 VLC_INTERN(s->temp[0][width-1], s->vlc[plane].table,
721 &s->gb, re, VLC_BITS, 3);
723 CLOSE_READER(re, &s->gb);
724 } else if (s->bps <= 14) {
725 OPEN_READER(re, &s->gb);
726 if (count >= (get_bits_left(&s->gb)) / (32 * 2)) {
727 for (i = 0; i < count && BITS_LEFT(re, &s->gb) > 0; i++) {
728 READ_2PIX_PLANE(s->temp16[0][2 * i], s->temp16[0][2 * i + 1], plane, OP14bits);
731 for(i=0; i<count; i++){
732 READ_2PIX_PLANE(s->temp16[0][2 * i], s->temp16[0][2 * i + 1], plane, OP14bits);
735 if( width&1 && BITS_LEFT(re, &s->gb)>0 ) {
737 int nb_bits, code, n;
738 UPDATE_CACHE(re, &s->gb);
739 index = SHOW_UBITS(re, &s->gb, VLC_BITS);
740 VLC_INTERN(s->temp16[0][width-1], s->vlc[plane].table,
741 &s->gb, re, VLC_BITS, 3);
743 CLOSE_READER(re, &s->gb);
745 if (count >= (get_bits_left(&s->gb)) / (32 * 2)) {
746 for (i = 0; i < count && get_bits_left(&s->gb) > 0; i++) {
747 READ_2PIX_PLANE16(s->temp16[0][2 * i], s->temp16[0][2 * i + 1], plane);
750 for(i=0; i<count; i++){
751 READ_2PIX_PLANE16(s->temp16[0][2 * i], s->temp16[0][2 * i + 1], plane);
754 if( width&1 && get_bits_left(&s->gb)>0 ) {
755 int dst = get_vlc2(&s->gb, s->vlc[plane].table, VLC_BITS, 3)<<2;
756 s->temp16[0][width-1] = dst + get_bits(&s->gb, 2);
761 static void decode_gray_bitstream(HYuvContext *s, int count)
764 OPEN_READER(re, &s->gb);
767 if (count >= (get_bits_left(&s->gb)) / (32 * 2)) {
768 for (i = 0; i < count && BITS_LEFT(re, &s->gb) > 0; i++) {
769 READ_2PIX(s->temp[0][2 * i], s->temp[0][2 * i + 1], 0);
772 for (i = 0; i < count; i++) {
773 READ_2PIX(s->temp[0][2 * i], s->temp[0][2 * i + 1], 0);
776 CLOSE_READER(re, &s->gb);
779 static av_always_inline void decode_bgr_1(HYuvContext *s, int count,
780 int decorrelate, int alpha)
783 OPEN_READER(re, &s->gb);
785 for (i = 0; i < count && BITS_LEFT(re, &s->gb) > 0; i++) {
787 int code, n, nb_bits;
789 UPDATE_CACHE(re, &s->gb);
790 index = SHOW_UBITS(re, &s->gb, VLC_BITS);
791 n = s->vlc[4].table[index][1];
794 code = s->vlc[4].table[index][0];
795 *(uint32_t *) &s->temp[0][4 * i] = s->pix_bgr_map[code];
796 LAST_SKIP_BITS(re, &s->gb, n);
799 VLC_INTERN(s->temp[0][4 * i + G], s->vlc[1].table,
800 &s->gb, re, VLC_BITS, 3);
802 UPDATE_CACHE(re, &s->gb);
803 index = SHOW_UBITS(re, &s->gb, VLC_BITS);
804 VLC_INTERN(code, s->vlc[0].table, &s->gb, re, VLC_BITS, 3);
805 s->temp[0][4 * i + B] = code + s->temp[0][4 * i + G];
807 UPDATE_CACHE(re, &s->gb);
808 index = SHOW_UBITS(re, &s->gb, VLC_BITS);
809 VLC_INTERN(code, s->vlc[2].table, &s->gb, re, VLC_BITS, 3);
810 s->temp[0][4 * i + R] = code + s->temp[0][4 * i + G];
812 VLC_INTERN(s->temp[0][4 * i + B], s->vlc[0].table,
813 &s->gb, re, VLC_BITS, 3);
815 UPDATE_CACHE(re, &s->gb);
816 index = SHOW_UBITS(re, &s->gb, VLC_BITS);
817 VLC_INTERN(s->temp[0][4 * i + G], s->vlc[1].table,
818 &s->gb, re, VLC_BITS, 3);
820 UPDATE_CACHE(re, &s->gb);
821 index = SHOW_UBITS(re, &s->gb, VLC_BITS);
822 VLC_INTERN(s->temp[0][4 * i + R], s->vlc[2].table,
823 &s->gb, re, VLC_BITS, 3);
827 UPDATE_CACHE(re, &s->gb);
828 index = SHOW_UBITS(re, &s->gb, VLC_BITS);
829 VLC_INTERN(s->temp[0][4 * i + A], s->vlc[2].table,
830 &s->gb, re, VLC_BITS, 3);
832 s->temp[0][4 * i + A] = 0;
834 CLOSE_READER(re, &s->gb);
837 static void decode_bgr_bitstream(HYuvContext *s, int count)
839 if (s->decorrelate) {
840 if (s->bitstream_bpp == 24)
841 decode_bgr_1(s, count, 1, 0);
843 decode_bgr_1(s, count, 1, 1);
845 if (s->bitstream_bpp == 24)
846 decode_bgr_1(s, count, 0, 0);
848 decode_bgr_1(s, count, 0, 1);
852 static void draw_slice(HYuvContext *s, AVFrame *frame, int y)
855 int offset[AV_NUM_DATA_POINTERS];
857 if (!s->avctx->draw_horiz_band)
860 h = y - s->last_slice_end;
863 if (s->bitstream_bpp == 12)
868 offset[0] = frame->linesize[0] * y;
869 offset[1] = frame->linesize[1] * cy;
870 offset[2] = frame->linesize[2] * cy;
871 for (i = 3; i < AV_NUM_DATA_POINTERS; i++)
875 s->avctx->draw_horiz_band(s->avctx, frame, offset, y, 3, h);
877 s->last_slice_end = y + h;
880 static int left_prediction(HYuvContext *s, uint8_t *dst, const uint8_t *src, int w, int acc)
883 return s->llviddsp.add_left_pred(dst, src, w, acc);
885 return s->llviddsp.add_left_pred_int16(( uint16_t *)dst, (const uint16_t *)src, s->n-1, w, acc);
889 static void add_bytes(HYuvContext *s, uint8_t *dst, uint8_t *src, int w)
892 s->llviddsp.add_bytes(dst, src, w);
894 s->hdsp.add_int16((uint16_t*)dst, (const uint16_t*)src, s->n - 1, w);
898 static void add_median_prediction(HYuvContext *s, uint8_t *dst, const uint8_t *src, const uint8_t *diff, int w, int *left, int *left_top)
901 s->llviddsp.add_median_pred(dst, src, diff, w, left, left_top);
903 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 static int decode_frame(AVCodecContext *avctx, void *data, int *got_frame,
909 const uint8_t *buf = avpkt->data;
910 int buf_size = avpkt->size;
911 HYuvContext *s = avctx->priv_data;
912 const int width = s->width;
913 const int width2 = s->width >> 1;
914 const int height = s->height;
915 int fake_ystride, fake_ustride, fake_vstride;
916 ThreadFrame frame = { .f = data };
917 AVFrame *const p = data;
918 int table_size = 0, ret;
920 av_fast_padded_malloc(&s->bitstream_buffer,
921 &s->bitstream_buffer_size,
923 if (!s->bitstream_buffer)
924 return AVERROR(ENOMEM);
926 s->bdsp.bswap_buf((uint32_t *) s->bitstream_buffer,
927 (const uint32_t *) buf, buf_size / 4);
929 if ((ret = ff_thread_get_buffer(avctx, &frame, 0)) < 0)
933 table_size = read_huffman_tables(s, s->bitstream_buffer, buf_size);
938 if ((unsigned) (buf_size - table_size) >= INT_MAX / 8)
939 return AVERROR_INVALIDDATA;
941 if ((ret = init_get_bits(&s->gb, s->bitstream_buffer + table_size,
942 (buf_size - table_size) * 8)) < 0)
945 fake_ystride = s->interlaced ? p->linesize[0] * 2 : p->linesize[0];
946 fake_ustride = s->interlaced ? p->linesize[1] * 2 : p->linesize[1];
947 fake_vstride = s->interlaced ? p->linesize[2] * 2 : p->linesize[2];
949 s->last_slice_end = 0;
951 if (s->version > 2) {
953 for(plane = 0; plane < 1 + 2*s->chroma + s->alpha; plane++) {
954 int left, lefttop, y;
957 int fake_stride = fake_ystride;
959 if (s->chroma && (plane == 1 || plane == 2)) {
960 w >>= s->chroma_h_shift;
961 h >>= s->chroma_v_shift;
962 fake_stride = plane == 1 ? fake_ustride : fake_vstride;
965 switch (s->predictor) {
968 decode_plane_bitstream(s, w, plane);
969 left = left_prediction(s, p->data[plane], s->temp[0], w, 0);
971 for (y = 1; y < h; y++) {
972 uint8_t *dst = p->data[plane] + p->linesize[plane]*y;
974 decode_plane_bitstream(s, w, plane);
975 left = left_prediction(s, dst, s->temp[0], w, left);
976 if (s->predictor == PLANE) {
977 if (y > s->interlaced) {
978 add_bytes(s, dst, dst - fake_stride, w);
985 decode_plane_bitstream(s, w, plane);
986 left= left_prediction(s, p->data[plane], s->temp[0], w, 0);
990 /* second line is left predicted for interlaced case */
992 decode_plane_bitstream(s, w, plane);
993 left = left_prediction(s, p->data[plane] + p->linesize[plane], s->temp[0], w, left);
997 lefttop = p->data[plane][0];
998 decode_plane_bitstream(s, w, plane);
999 add_median_prediction(s, p->data[plane] + fake_stride, p->data[plane], s->temp[0], w, &left, &lefttop);
1005 decode_plane_bitstream(s, w, plane);
1007 dst = p->data[plane] + p->linesize[plane] * y;
1009 add_median_prediction(s, dst, dst - fake_stride, s->temp[0], w, &left, &lefttop);
1015 draw_slice(s, p, height);
1016 } else if (s->bitstream_bpp < 24) {
1018 int lefty, leftu, leftv;
1019 int lefttopy, lefttopu, lefttopv;
1022 p->data[0][3] = get_bits(&s->gb, 8);
1023 p->data[0][2] = get_bits(&s->gb, 8);
1024 p->data[0][1] = get_bits(&s->gb, 8);
1025 p->data[0][0] = get_bits(&s->gb, 8);
1027 av_log(avctx, AV_LOG_ERROR,
1028 "YUY2 output is not implemented yet\n");
1029 return AVERROR_PATCHWELCOME;
1032 p->data[2][0] = get_bits(&s->gb, 8);
1034 p->data[0][1] = get_bits(&s->gb, 8);
1036 p->data[1][0] = get_bits(&s->gb, 8);
1037 p->data[0][0] = get_bits(&s->gb, 8);
1039 switch (s->predictor) {
1042 decode_422_bitstream(s, width - 2);
1043 lefty = s->llviddsp.add_left_pred(p->data[0] + 2, s->temp[0],
1045 if (!(s->flags & AV_CODEC_FLAG_GRAY)) {
1046 leftu = s->llviddsp.add_left_pred(p->data[1] + 1, s->temp[1], width2 - 1, leftu);
1047 leftv = s->llviddsp.add_left_pred(p->data[2] + 1, s->temp[2], width2 - 1, leftv);
1050 for (cy = y = 1; y < s->height; y++, cy++) {
1051 uint8_t *ydst, *udst, *vdst;
1053 if (s->bitstream_bpp == 12) {
1054 decode_gray_bitstream(s, width);
1056 ydst = p->data[0] + p->linesize[0] * y;
1058 lefty = s->llviddsp.add_left_pred(ydst, s->temp[0],
1060 if (s->predictor == PLANE) {
1061 if (y > s->interlaced)
1062 s->llviddsp.add_bytes(ydst, ydst - fake_ystride, width);
1069 draw_slice(s, p, y);
1071 ydst = p->data[0] + p->linesize[0] * y;
1072 udst = p->data[1] + p->linesize[1] * cy;
1073 vdst = p->data[2] + p->linesize[2] * cy;
1075 decode_422_bitstream(s, width);
1076 lefty = s->llviddsp.add_left_pred(ydst, s->temp[0],
1078 if (!(s->flags & AV_CODEC_FLAG_GRAY)) {
1079 leftu = s->llviddsp.add_left_pred(udst, s->temp[1], width2, leftu);
1080 leftv = s->llviddsp.add_left_pred(vdst, s->temp[2], width2, leftv);
1082 if (s->predictor == PLANE) {
1083 if (cy > s->interlaced) {
1084 s->llviddsp.add_bytes(ydst, ydst - fake_ystride, width);
1085 if (!(s->flags & AV_CODEC_FLAG_GRAY)) {
1086 s->llviddsp.add_bytes(udst, udst - fake_ustride, width2);
1087 s->llviddsp.add_bytes(vdst, vdst - fake_vstride, width2);
1092 draw_slice(s, p, height);
1096 /* first line except first 2 pixels is left predicted */
1097 decode_422_bitstream(s, width - 2);
1098 lefty = s->llviddsp.add_left_pred(p->data[0] + 2, s->temp[0],
1100 if (!(s->flags & AV_CODEC_FLAG_GRAY)) {
1101 leftu = s->llviddsp.add_left_pred(p->data[1] + 1, s->temp[1], width2 - 1, leftu);
1102 leftv = s->llviddsp.add_left_pred(p->data[2] + 1, s->temp[2], width2 - 1, leftv);
1107 /* second line is left predicted for interlaced case */
1108 if (s->interlaced) {
1109 decode_422_bitstream(s, width);
1110 lefty = s->llviddsp.add_left_pred(p->data[0] + p->linesize[0],
1111 s->temp[0], width, lefty);
1112 if (!(s->flags & AV_CODEC_FLAG_GRAY)) {
1113 leftu = s->llviddsp.add_left_pred(p->data[1] + p->linesize[2], s->temp[1], width2, leftu);
1114 leftv = s->llviddsp.add_left_pred(p->data[2] + p->linesize[1], s->temp[2], width2, leftv);
1120 /* next 4 pixels are left predicted too */
1121 decode_422_bitstream(s, 4);
1122 lefty = s->llviddsp.add_left_pred(p->data[0] + fake_ystride,
1123 s->temp[0], 4, lefty);
1124 if (!(s->flags & AV_CODEC_FLAG_GRAY)) {
1125 leftu = s->llviddsp.add_left_pred(p->data[1] + fake_ustride, s->temp[1], 2, leftu);
1126 leftv = s->llviddsp.add_left_pred(p->data[2] + fake_vstride, s->temp[2], 2, leftv);
1129 /* next line except the first 4 pixels is median predicted */
1130 lefttopy = p->data[0][3];
1131 decode_422_bitstream(s, width - 4);
1132 s->llviddsp.add_median_pred(p->data[0] + fake_ystride + 4,
1133 p->data[0] + 4, s->temp[0],
1134 width - 4, &lefty, &lefttopy);
1135 if (!(s->flags & AV_CODEC_FLAG_GRAY)) {
1136 lefttopu = p->data[1][1];
1137 lefttopv = p->data[2][1];
1138 s->llviddsp.add_median_pred(p->data[1] + fake_ustride + 2, p->data[1] + 2, s->temp[1], width2 - 2, &leftu, &lefttopu);
1139 s->llviddsp.add_median_pred(p->data[2] + fake_vstride + 2, p->data[2] + 2, s->temp[2], width2 - 2, &leftv, &lefttopv);
1144 for (; y < height; y++, cy++) {
1145 uint8_t *ydst, *udst, *vdst;
1147 if (s->bitstream_bpp == 12) {
1148 while (2 * cy > y) {
1149 decode_gray_bitstream(s, width);
1150 ydst = p->data[0] + p->linesize[0] * y;
1151 s->llviddsp.add_median_pred(ydst, ydst - fake_ystride,
1159 draw_slice(s, p, y);
1161 decode_422_bitstream(s, width);
1163 ydst = p->data[0] + p->linesize[0] * y;
1164 udst = p->data[1] + p->linesize[1] * cy;
1165 vdst = p->data[2] + p->linesize[2] * cy;
1167 s->llviddsp.add_median_pred(ydst, ydst - fake_ystride,
1170 if (!(s->flags & AV_CODEC_FLAG_GRAY)) {
1171 s->llviddsp.add_median_pred(udst, udst - fake_ustride, s->temp[1], width2, &leftu, &lefttopu);
1172 s->llviddsp.add_median_pred(vdst, vdst - fake_vstride, s->temp[2], width2, &leftv, &lefttopv);
1176 draw_slice(s, p, height);
1183 const int last_line = (height - 1) * p->linesize[0];
1185 if (s->bitstream_bpp == 32) {
1186 left[A] = p->data[0][last_line + A] = get_bits(&s->gb, 8);
1187 left[R] = p->data[0][last_line + R] = get_bits(&s->gb, 8);
1188 left[G] = p->data[0][last_line + G] = get_bits(&s->gb, 8);
1189 left[B] = p->data[0][last_line + B] = get_bits(&s->gb, 8);
1191 left[R] = p->data[0][last_line + R] = get_bits(&s->gb, 8);
1192 left[G] = p->data[0][last_line + G] = get_bits(&s->gb, 8);
1193 left[B] = p->data[0][last_line + B] = get_bits(&s->gb, 8);
1194 left[A] = p->data[0][last_line + A] = 255;
1195 skip_bits(&s->gb, 8);
1199 switch (s->predictor) {
1202 decode_bgr_bitstream(s, width - 1);
1203 s->hdsp.add_hfyu_left_pred_bgr32(p->data[0] + last_line + 4,
1204 s->temp[0], width - 1, left);
1206 for (y = s->height - 2; y >= 0; y--) { // Yes it is stored upside down.
1207 decode_bgr_bitstream(s, width);
1209 s->hdsp.add_hfyu_left_pred_bgr32(p->data[0] + p->linesize[0] * y,
1210 s->temp[0], width, left);
1211 if (s->predictor == PLANE) {
1212 if (s->bitstream_bpp != 32)
1214 if (y < s->height - 1 - s->interlaced) {
1215 s->llviddsp.add_bytes(p->data[0] + p->linesize[0] * y,
1216 p->data[0] + p->linesize[0] * y +
1217 fake_ystride, 4 * width);
1221 // just 1 large slice as this is not possible in reverse order
1222 draw_slice(s, p, height);
1225 av_log(avctx, AV_LOG_ERROR,
1226 "prediction type not supported!\n");
1229 av_log(avctx, AV_LOG_ERROR,
1230 "BGR24 output is not implemented yet\n");
1231 return AVERROR_PATCHWELCOME;
1238 return (get_bits_count(&s->gb) + 31) / 32 * 4 + table_size;
1241 AVCodec ff_huffyuv_decoder = {
1243 .long_name = NULL_IF_CONFIG_SMALL("Huffyuv / HuffYUV"),
1244 .type = AVMEDIA_TYPE_VIDEO,
1245 .id = AV_CODEC_ID_HUFFYUV,
1246 .priv_data_size = sizeof(HYuvContext),
1247 .init = decode_init,
1248 .close = decode_end,
1249 .decode = decode_frame,
1250 .capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_DRAW_HORIZ_BAND |
1251 AV_CODEC_CAP_FRAME_THREADS,
1252 .init_thread_copy = ONLY_IF_THREADS_ENABLED(decode_init_thread_copy),
1255 #if CONFIG_FFVHUFF_DECODER
1256 AVCodec ff_ffvhuff_decoder = {
1258 .long_name = NULL_IF_CONFIG_SMALL("Huffyuv FFmpeg variant"),
1259 .type = AVMEDIA_TYPE_VIDEO,
1260 .id = AV_CODEC_ID_FFVHUFF,
1261 .priv_data_size = sizeof(HYuvContext),
1262 .init = decode_init,
1263 .close = decode_end,
1264 .decode = decode_frame,
1265 .capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_DRAW_HORIZ_BAND |
1266 AV_CODEC_CAP_FRAME_THREADS,
1267 .init_thread_copy = ONLY_IF_THREADS_ENABLED(decode_init_thread_copy),
1269 #endif /* CONFIG_FFVHUFF_DECODER */