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"
40 #include "libavutil/pixdesc.h"
42 #define classic_shift_luma_table_size 42
43 static 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,
50 #define classic_shift_chroma_table_size 59
51 static 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,
59 static 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,
78 static 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,
97 static int read_len_table(uint8_t *dst, GetBitContext *gb, int n)
101 for (i = 0; i < n;) {
102 repeat = get_bits(gb, 3);
103 val = get_bits(gb, 5);
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;
116 static int generate_joint_tables(HYuvContext *s)
118 uint16_t symbols[1 << VLC_BITS];
119 uint16_t bits[1 << VLC_BITS];
120 uint8_t len[1 << VLC_BITS];
123 if (s->bitstream_bpp < 24 || s->version > 2) {
125 for (p = 0; p < 4; p++) {
126 int p0 = s->version > 2 ? p : 0;
127 for (i = y = 0; y < s->vlc_n; y++) {
128 int len0 = s->len[p0][y];
129 int limit = VLC_BITS - len0;
130 if (limit <= 0 || !len0)
132 if ((sign_extend(y, 8) & (s->vlc_n-1)) != y)
134 for (u = 0; u < s->vlc_n; u++) {
135 int len1 = s->len[p][u];
136 if (len1 > limit || !len1)
138 if ((sign_extend(u, 8) & (s->vlc_n-1)) != u)
140 av_assert0(i < (1 << VLC_BITS));
141 len[i] = len0 + len1;
142 bits[i] = (s->bits[p0][y] << len1) + s->bits[p][u];
143 symbols[i] = (y << 8) + (u & 0xFF);
147 ff_free_vlc(&s->vlc[4 + p]);
148 if ((ret = ff_init_vlc_sparse(&s->vlc[4 + p], VLC_BITS, i, len, 1, 1,
149 bits, 2, 2, symbols, 2, 2, 0)) < 0)
153 uint8_t (*map)[4] = (uint8_t(*)[4]) s->pix_bgr_map;
154 int i, b, g, r, code;
155 int p0 = s->decorrelate;
156 int p1 = !s->decorrelate;
157 /* Restrict the range to +/-16 because that's pretty much guaranteed
158 * to cover all the combinations that fit in 11 bits total, and it
159 * does not matter if we miss a few rare codes. */
160 for (i = 0, g = -16; g < 16; g++) {
161 int len0 = s->len[p0][g & 255];
162 int limit0 = VLC_BITS - len0;
163 if (limit0 < 2 || !len0)
165 for (b = -16; b < 16; b++) {
166 int len1 = s->len[p1][b & 255];
167 int limit1 = limit0 - len1;
168 if (limit1 < 1 || !len1)
170 code = (s->bits[p0][g & 255] << len1) + s->bits[p1][b & 255];
171 for (r = -16; r < 16; r++) {
172 int len2 = s->len[2][r & 255];
173 if (len2 > limit1 || !len2)
175 av_assert0(i < (1 << VLC_BITS));
176 len[i] = len0 + len1 + len2;
177 bits[i] = (code << len2) + s->bits[2][r & 255];
178 if (s->decorrelate) {
191 ff_free_vlc(&s->vlc[4]);
192 if ((ret = init_vlc(&s->vlc[4], VLC_BITS, i, len, 1, 1, bits, 2, 2, 0)) < 0)
198 static int read_huffman_tables(HYuvContext *s, const uint8_t *src, int length)
205 init_get_bits(&gb, src, length * 8);
208 count = 1 + s->alpha + 2*s->chroma;
210 for (i = 0; i < count; i++) {
211 if (read_len_table(s->len[i], &gb, s->vlc_n) < 0)
213 if (ff_huffyuv_generate_bits_table(s->bits[i], s->len[i], s->vlc_n) < 0)
215 ff_free_vlc(&s->vlc[i]);
216 if ((ret = init_vlc(&s->vlc[i], VLC_BITS, s->vlc_n, s->len[i], 1, 1,
217 s->bits[i], 4, 4, 0)) < 0)
221 if ((ret = generate_joint_tables(s)) < 0)
224 return (get_bits_count(&gb) + 7) / 8;
227 static int read_old_huffman_tables(HYuvContext *s)
233 init_get_bits(&gb, classic_shift_luma,
234 classic_shift_luma_table_size * 8);
235 if (read_len_table(s->len[0], &gb, 256) < 0)
238 init_get_bits(&gb, classic_shift_chroma,
239 classic_shift_chroma_table_size * 8);
240 if (read_len_table(s->len[1], &gb, 256) < 0)
243 for (i = 0; i < 256; i++)
244 s->bits[0][i] = classic_add_luma[i];
245 for (i = 0; i < 256; i++)
246 s->bits[1][i] = classic_add_chroma[i];
248 if (s->bitstream_bpp >= 24) {
249 memcpy(s->bits[1], s->bits[0], 256 * sizeof(uint32_t));
250 memcpy(s->len[1], s->len[0], 256 * sizeof(uint8_t));
252 memcpy(s->bits[2], s->bits[1], 256 * sizeof(uint32_t));
253 memcpy(s->len[2], s->len[1], 256 * sizeof(uint8_t));
255 for (i = 0; i < 4; i++) {
256 ff_free_vlc(&s->vlc[i]);
257 if ((ret = init_vlc(&s->vlc[i], VLC_BITS, 256, s->len[i], 1, 1,
258 s->bits[i], 4, 4, 0)) < 0)
262 if ((ret = generate_joint_tables(s)) < 0)
268 static av_cold int decode_init(AVCodecContext *avctx)
270 HYuvContext *s = avctx->priv_data;
272 ff_huffyuvdsp_init(&s->hdsp);
273 memset(s->vlc, 0, 4 * sizeof(VLC));
275 s->interlaced = avctx->height > 288;
278 if (avctx->extradata_size) {
279 if ((avctx->bits_per_coded_sample & 7) &&
280 avctx->bits_per_coded_sample != 12)
281 s->version = 1; // do such files exist at all?
282 else if (avctx->extradata_size > 3 && avctx->extradata[3] == 0)
291 s->vlc_n = FFMIN(s->n, MAX_VLC_N);
293 if (s->version >= 2) {
294 int method, interlace;
296 if (avctx->extradata_size < 4)
297 return AVERROR_INVALIDDATA;
299 method = avctx->extradata[0];
300 s->decorrelate = method & 64 ? 1 : 0;
301 s->predictor = method & 63;
302 if (s->version == 2) {
303 s->bitstream_bpp = avctx->extradata[1];
304 if (s->bitstream_bpp == 0)
305 s->bitstream_bpp = avctx->bits_per_coded_sample & ~7;
307 s->bps = (avctx->extradata[1] >> 4) + 1;
309 s->vlc_n = FFMIN(s->n, MAX_VLC_N);
310 s->chroma_h_shift = avctx->extradata[1] & 3;
311 s->chroma_v_shift = (avctx->extradata[1] >> 2) & 3;
312 s->yuv = !!(avctx->extradata[2] & 1);
313 s->chroma= !!(avctx->extradata[2] & 3);
314 s->alpha = !!(avctx->extradata[2] & 4);
316 interlace = (avctx->extradata[2] & 0x30) >> 4;
317 s->interlaced = (interlace == 1) ? 1 : (interlace == 2) ? 0 : s->interlaced;
318 s->context = avctx->extradata[2] & 0x40 ? 1 : 0;
320 if (read_huffman_tables(s, avctx->extradata + 4,
321 avctx->extradata_size - 4) < 0)
322 return AVERROR_INVALIDDATA;
324 switch (avctx->bits_per_coded_sample & 7) {
334 s->predictor = PLANE;
335 s->decorrelate = avctx->bits_per_coded_sample >= 24;
338 s->predictor = MEDIAN;
342 s->predictor = LEFT; // OLD
346 s->bitstream_bpp = avctx->bits_per_coded_sample & ~7;
349 if (read_old_huffman_tables(s) < 0)
350 return AVERROR_INVALIDDATA;
353 if (s->version <= 2) {
354 switch (s->bitstream_bpp) {
356 avctx->pix_fmt = AV_PIX_FMT_YUV420P;
361 avctx->pix_fmt = AV_PIX_FMT_YUYV422;
363 avctx->pix_fmt = AV_PIX_FMT_YUV422P;
368 avctx->pix_fmt = AV_PIX_FMT_0RGB32;
370 avctx->pix_fmt = AV_PIX_FMT_BGR24;
373 av_assert0(s->bgr32);
374 avctx->pix_fmt = AV_PIX_FMT_RGB32;
378 return AVERROR_INVALIDDATA;
380 av_pix_fmt_get_chroma_sub_sample(avctx->pix_fmt,
384 switch ( (s->chroma<<10) | (s->yuv<<9) | (s->alpha<<8) | ((s->bps-1)<<4) | s->chroma_h_shift | (s->chroma_v_shift<<2)) {
386 avctx->pix_fmt = AV_PIX_FMT_GRAY8;
389 avctx->pix_fmt = AV_PIX_FMT_GRAY16;
392 avctx->pix_fmt = AV_PIX_FMT_GRAY8A;
395 avctx->pix_fmt = AV_PIX_FMT_GBRP;
398 avctx->pix_fmt = AV_PIX_FMT_GBRP9;
401 avctx->pix_fmt = AV_PIX_FMT_GBRP10;
404 avctx->pix_fmt = AV_PIX_FMT_GBRP12;
407 avctx->pix_fmt = AV_PIX_FMT_GBRP14;
410 avctx->pix_fmt = AV_PIX_FMT_GBRP16;
413 avctx->pix_fmt = AV_PIX_FMT_GBRAP;
416 avctx->pix_fmt = AV_PIX_FMT_YUV444P;
419 avctx->pix_fmt = AV_PIX_FMT_YUV444P9;
422 avctx->pix_fmt = AV_PIX_FMT_YUV444P10;
425 avctx->pix_fmt = AV_PIX_FMT_YUV444P12;
428 avctx->pix_fmt = AV_PIX_FMT_YUV444P14;
431 avctx->pix_fmt = AV_PIX_FMT_YUV444P16;
434 avctx->pix_fmt = AV_PIX_FMT_YUV422P;
437 avctx->pix_fmt = AV_PIX_FMT_YUV422P9;
440 avctx->pix_fmt = AV_PIX_FMT_YUV422P10;
443 avctx->pix_fmt = AV_PIX_FMT_YUV422P12;
446 avctx->pix_fmt = AV_PIX_FMT_YUV422P14;
449 avctx->pix_fmt = AV_PIX_FMT_YUV422P16;
452 avctx->pix_fmt = AV_PIX_FMT_YUV411P;
455 avctx->pix_fmt = AV_PIX_FMT_YUV440P;
458 avctx->pix_fmt = AV_PIX_FMT_YUV420P;
461 avctx->pix_fmt = AV_PIX_FMT_YUV420P9;
464 avctx->pix_fmt = AV_PIX_FMT_YUV420P10;
467 avctx->pix_fmt = AV_PIX_FMT_YUV420P12;
470 avctx->pix_fmt = AV_PIX_FMT_YUV420P14;
473 avctx->pix_fmt = AV_PIX_FMT_YUV420P16;
476 avctx->pix_fmt = AV_PIX_FMT_YUV410P;
479 avctx->pix_fmt = AV_PIX_FMT_YUVA444P;
482 avctx->pix_fmt = AV_PIX_FMT_YUVA444P9;
485 avctx->pix_fmt = AV_PIX_FMT_YUVA444P10;
488 avctx->pix_fmt = AV_PIX_FMT_YUVA444P16;
491 avctx->pix_fmt = AV_PIX_FMT_YUVA422P;
494 avctx->pix_fmt = AV_PIX_FMT_YUVA422P9;
497 avctx->pix_fmt = AV_PIX_FMT_YUVA422P10;
500 avctx->pix_fmt = AV_PIX_FMT_YUVA422P16;
503 avctx->pix_fmt = AV_PIX_FMT_YUVA420P;
506 avctx->pix_fmt = AV_PIX_FMT_YUVA420P9;
509 avctx->pix_fmt = AV_PIX_FMT_YUVA420P10;
512 avctx->pix_fmt = AV_PIX_FMT_YUVA420P16;
515 return AVERROR_INVALIDDATA;
519 ff_huffyuv_common_init(avctx);
521 if ((avctx->pix_fmt == AV_PIX_FMT_YUV422P || avctx->pix_fmt == AV_PIX_FMT_YUV420P) && avctx->width & 1) {
522 av_log(avctx, AV_LOG_ERROR, "width must be even for this colorspace\n");
523 return AVERROR_INVALIDDATA;
525 if (s->predictor == MEDIAN && avctx->pix_fmt == AV_PIX_FMT_YUV422P && avctx->width%4) {
526 av_log(avctx, AV_LOG_ERROR, "width must be a multiple of 4 this colorspace and predictor\n");
527 return AVERROR_INVALIDDATA;
529 if (ff_huffyuv_alloc_temp(s)) {
530 ff_huffyuv_common_end(s);
531 return AVERROR(ENOMEM);
537 static av_cold int decode_init_thread_copy(AVCodecContext *avctx)
539 HYuvContext *s = avctx->priv_data;
542 if (ff_huffyuv_alloc_temp(s)) {
543 ff_huffyuv_common_end(s);
544 return AVERROR(ENOMEM);
547 for (i = 0; i < 8; i++)
548 s->vlc[i].table = NULL;
550 if (s->version >= 2) {
551 if (read_huffman_tables(s, avctx->extradata + 4,
552 avctx->extradata_size) < 0)
553 return AVERROR_INVALIDDATA;
555 if (read_old_huffman_tables(s) < 0)
556 return AVERROR_INVALIDDATA;
562 /** Subset of GET_VLC for use in hand-roller VLC code */
563 #define VLC_INTERN(dst, table, gb, name, bits, max_depth) \
564 code = table[index][0]; \
565 n = table[index][1]; \
566 if (max_depth > 1 && n < 0) { \
567 LAST_SKIP_BITS(name, gb, bits); \
568 UPDATE_CACHE(name, gb); \
571 index = SHOW_UBITS(name, gb, nb_bits) + code; \
572 code = table[index][0]; \
573 n = table[index][1]; \
574 if (max_depth > 2 && n < 0) { \
575 LAST_SKIP_BITS(name, gb, nb_bits); \
576 UPDATE_CACHE(name, gb); \
579 index = SHOW_UBITS(name, gb, nb_bits) + code; \
580 code = table[index][0]; \
581 n = table[index][1]; \
585 LAST_SKIP_BITS(name, gb, n)
588 #define GET_VLC_DUAL(dst0, dst1, name, gb, dtable, table1, table2, \
589 bits, max_depth, OP) \
591 unsigned int index = SHOW_UBITS(name, gb, bits); \
592 int code, n = dtable[index][1]; \
596 VLC_INTERN(dst0, table1, gb, name, bits, max_depth); \
598 UPDATE_CACHE(re, gb); \
599 index = SHOW_UBITS(name, gb, bits); \
600 VLC_INTERN(dst1, table2, gb, name, bits, max_depth); \
602 code = dtable[index][0]; \
603 OP(dst0, dst1, code); \
604 LAST_SKIP_BITS(name, gb, n); \
608 #define OP8bits(dst0, dst1, code) dst0 = code>>8; dst1 = code
610 #define READ_2PIX(dst0, dst1, plane1) \
611 UPDATE_CACHE(re, &s->gb); \
612 GET_VLC_DUAL(dst0, dst1, re, &s->gb, s->vlc[4+plane1].table, \
613 s->vlc[0].table, s->vlc[plane1].table, VLC_BITS, 3, OP8bits)
615 static void decode_422_bitstream(HYuvContext *s, int count)
618 OPEN_READER(re, &s->gb);
621 icount = get_bits_left(&s->gb) / (32 * 4);
622 if (count >= icount) {
623 for (i = 0; i < icount; i++) {
624 READ_2PIX(s->temp[0][2 * i], s->temp[1][i], 1);
625 READ_2PIX(s->temp[0][2 * i + 1], s->temp[2][i], 2);
627 for (; i < count && get_bits_left(&s->gb) > 0; i++) {
628 READ_2PIX(s->temp[0][2 * i ], s->temp[1][i], 1);
629 if (get_bits_left(&s->gb) <= 0) break;
630 READ_2PIX(s->temp[0][2 * i + 1], s->temp[2][i], 2);
632 for (; i < count; i++)
633 s->temp[0][2 * i ] = s->temp[1][i] =
634 s->temp[0][2 * i + 1] = s->temp[2][i] = 0;
636 for (i = 0; i < count; i++) {
637 READ_2PIX(s->temp[0][2 * i], s->temp[1][i], 1);
638 READ_2PIX(s->temp[0][2 * i + 1], s->temp[2][i], 2);
641 CLOSE_READER(re, &s->gb);
644 #define READ_2PIX_PLANE(dst0, dst1, plane, OP) \
645 UPDATE_CACHE(re, &s->gb); \
646 GET_VLC_DUAL(dst0, dst1, re, &s->gb, s->vlc[4+plane].table, \
647 s->vlc[plane].table, s->vlc[plane].table, VLC_BITS, 3, OP)
649 #define OP14bits(dst0, dst1, code) dst0 = code>>8; dst1 = sign_extend(code, 8)
651 /* TODO instead of restarting the read when the code isn't in the first level
652 * of the joint table, jump into the 2nd level of the individual table. */
653 #define READ_2PIX_PLANE16(dst0, dst1, plane){\
654 dst0 = get_vlc2(&s->gb, s->vlc[plane].table, VLC_BITS, 3)<<2;\
655 dst0 += get_bits(&s->gb, 2);\
656 dst1 = get_vlc2(&s->gb, s->vlc[plane].table, VLC_BITS, 3)<<2;\
657 dst1 += get_bits(&s->gb, 2);\
659 static void decode_plane_bitstream(HYuvContext *s, int count, int plane)
666 OPEN_READER(re, &s->gb);
667 if (count >= (get_bits_left(&s->gb)) / (32 * 2)) {
668 for (i = 0; i < count && get_bits_left(&s->gb) > 0; i++) {
669 READ_2PIX_PLANE(s->temp[0][2 * i], s->temp[0][2 * i + 1], plane, OP8bits);
672 for(i=0; i<count; i++){
673 READ_2PIX_PLANE(s->temp[0][2 * i], s->temp[0][2 * i + 1], plane, OP8bits);
676 CLOSE_READER(re, &s->gb);
677 } else if (s->bps <= 14) {
678 OPEN_READER(re, &s->gb);
679 if (count >= (get_bits_left(&s->gb)) / (32 * 2)) {
680 for (i = 0; i < count && get_bits_left(&s->gb) > 0; i++) {
681 READ_2PIX_PLANE(s->temp16[0][2 * i], s->temp16[0][2 * i + 1], plane, OP14bits);
684 for(i=0; i<count; i++){
685 READ_2PIX_PLANE(s->temp16[0][2 * i], s->temp16[0][2 * i + 1], plane, OP14bits);
688 CLOSE_READER(re, &s->gb);
690 if (count >= (get_bits_left(&s->gb)) / (32 * 2)) {
691 for (i = 0; i < count && get_bits_left(&s->gb) > 0; i++) {
692 READ_2PIX_PLANE16(s->temp16[0][2 * i], s->temp16[0][2 * i + 1], plane);
695 for(i=0; i<count; i++){
696 READ_2PIX_PLANE16(s->temp16[0][2 * i], s->temp16[0][2 * i + 1], plane);
702 static void decode_gray_bitstream(HYuvContext *s, int count)
705 OPEN_READER(re, &s->gb);
708 if (count >= (get_bits_left(&s->gb)) / (32 * 2)) {
709 for (i = 0; i < count && get_bits_left(&s->gb) > 0; i++) {
710 READ_2PIX(s->temp[0][2 * i], s->temp[0][2 * i + 1], 0);
713 for (i = 0; i < count; i++) {
714 READ_2PIX(s->temp[0][2 * i], s->temp[0][2 * i + 1], 0);
717 CLOSE_READER(re, &s->gb);
720 static av_always_inline void decode_bgr_1(HYuvContext *s, int count,
721 int decorrelate, int alpha)
724 OPEN_READER(re, &s->gb);
726 for (i = 0; i < count && get_bits_left(&s->gb) > 0; i++) {
730 UPDATE_CACHE(re, &s->gb);
731 index = SHOW_UBITS(re, &s->gb, VLC_BITS);
732 n = s->vlc[4].table[index][1];
735 code = s->vlc[4].table[index][0];
736 *(uint32_t *) &s->temp[0][4 * i] = s->pix_bgr_map[code];
737 LAST_SKIP_BITS(re, &s->gb, n);
741 VLC_INTERN(s->temp[0][4 * i + G], s->vlc[1].table,
742 &s->gb, re, VLC_BITS, 3);
744 UPDATE_CACHE(re, &s->gb);
745 index = SHOW_UBITS(re, &s->gb, VLC_BITS);
746 VLC_INTERN(code, s->vlc[0].table, &s->gb, re, VLC_BITS, 3);
747 s->temp[0][4 * i + B] = code + s->temp[0][4 * i + G];
749 UPDATE_CACHE(re, &s->gb);
750 index = SHOW_UBITS(re, &s->gb, VLC_BITS);
751 VLC_INTERN(code, s->vlc[2].table, &s->gb, re, VLC_BITS, 3);
752 s->temp[0][4 * i + R] = code + s->temp[0][4 * i + G];
754 VLC_INTERN(s->temp[0][4 * i + B], s->vlc[0].table,
755 &s->gb, re, VLC_BITS, 3);
757 UPDATE_CACHE(re, &s->gb);
758 index = SHOW_UBITS(re, &s->gb, VLC_BITS);
759 VLC_INTERN(s->temp[0][4 * i + G], s->vlc[1].table,
760 &s->gb, re, VLC_BITS, 3);
762 UPDATE_CACHE(re, &s->gb);
763 index = SHOW_UBITS(re, &s->gb, VLC_BITS);
764 VLC_INTERN(s->temp[0][4 * i + R], s->vlc[2].table,
765 &s->gb, re, VLC_BITS, 3);
768 UPDATE_CACHE(re, &s->gb);
769 index = SHOW_UBITS(re, &s->gb, VLC_BITS);
770 VLC_INTERN(s->temp[0][4 * i + A], s->vlc[2].table,
771 &s->gb, re, VLC_BITS, 3);
773 s->temp[0][4 * i + A] = 0;
776 CLOSE_READER(re, &s->gb);
779 static void decode_bgr_bitstream(HYuvContext *s, int count)
781 if (s->decorrelate) {
782 if (s->bitstream_bpp == 24)
783 decode_bgr_1(s, count, 1, 0);
785 decode_bgr_1(s, count, 1, 1);
787 if (s->bitstream_bpp == 24)
788 decode_bgr_1(s, count, 0, 0);
790 decode_bgr_1(s, count, 0, 1);
794 static void draw_slice(HYuvContext *s, AVFrame *frame, int y)
797 int offset[AV_NUM_DATA_POINTERS];
799 if (s->avctx->draw_horiz_band == NULL)
802 h = y - s->last_slice_end;
805 if (s->bitstream_bpp == 12)
810 offset[0] = frame->linesize[0] * y;
811 offset[1] = frame->linesize[1] * cy;
812 offset[2] = frame->linesize[2] * cy;
813 for (i = 3; i < AV_NUM_DATA_POINTERS; i++)
817 s->avctx->draw_horiz_band(s->avctx, frame, offset, y, 3, h);
819 s->last_slice_end = y + h;
822 static int left_prediction(HYuvContext *s, uint8_t *dst, const uint8_t *src, int w, int acc)
825 return s->hdsp.add_hfyu_left_pred(dst, src, w, acc);
827 return s->llviddsp.add_hfyu_left_pred_int16(( uint16_t *)dst, (const uint16_t *)src, s->n-1, w, acc);
831 static void add_bytes(HYuvContext *s, uint8_t *dst, uint8_t *src, int w)
834 s->hdsp.add_bytes(dst, src, w);
836 s->llviddsp.add_int16((uint16_t*)dst, (const uint16_t*)src, s->n - 1, w);
840 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)
843 s->hdsp.add_hfyu_median_pred(dst, src, diff, w, left, left_top);
845 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);
848 static int decode_frame(AVCodecContext *avctx, void *data, int *got_frame,
851 const uint8_t *buf = avpkt->data;
852 int buf_size = avpkt->size;
853 HYuvContext *s = avctx->priv_data;
854 const int width = s->width;
855 const int width2 = s->width >> 1;
856 const int height = s->height;
857 int fake_ystride, fake_ustride, fake_vstride;
858 ThreadFrame frame = { .f = data };
859 AVFrame *const p = data;
860 int table_size = 0, ret;
862 av_fast_padded_malloc(&s->bitstream_buffer,
863 &s->bitstream_buffer_size,
865 if (!s->bitstream_buffer)
866 return AVERROR(ENOMEM);
868 s->bdsp.bswap_buf((uint32_t *) s->bitstream_buffer,
869 (const uint32_t *) buf, buf_size / 4);
871 if ((ret = ff_thread_get_buffer(avctx, &frame, 0)) < 0)
875 table_size = read_huffman_tables(s, s->bitstream_buffer, buf_size);
877 return AVERROR_INVALIDDATA;
880 if ((unsigned) (buf_size - table_size) >= INT_MAX / 8)
881 return AVERROR_INVALIDDATA;
883 init_get_bits(&s->gb, s->bitstream_buffer + table_size,
884 (buf_size - table_size) * 8);
886 fake_ystride = s->interlaced ? p->linesize[0] * 2 : p->linesize[0];
887 fake_ustride = s->interlaced ? p->linesize[1] * 2 : p->linesize[1];
888 fake_vstride = s->interlaced ? p->linesize[2] * 2 : p->linesize[2];
890 s->last_slice_end = 0;
892 if (s->version > 2) {
894 for(plane = 0; plane < 1 + 2*s->chroma + s->alpha; plane++) {
895 int left, lefttop, y;
898 int fake_stride = fake_ystride;
900 if (s->chroma && (plane == 1 || plane == 2)) {
901 w >>= s->chroma_h_shift;
902 h >>= s->chroma_v_shift;
903 fake_stride = plane == 1 ? fake_ustride : fake_vstride;
906 switch (s->predictor) {
909 decode_plane_bitstream(s, w, plane);
910 left = left_prediction(s, p->data[plane], s->temp[0], w, 0);
912 for (y = 1; y < h; y++) {
913 uint8_t *dst = p->data[plane] + p->linesize[plane]*y;
915 decode_plane_bitstream(s, w, plane);
916 left = left_prediction(s, dst, s->temp[0], w, left);
917 if (s->predictor == PLANE) {
918 if (y > s->interlaced) {
919 add_bytes(s, dst, dst - fake_stride, w);
926 decode_plane_bitstream(s, w, plane);
927 left= left_prediction(s, p->data[plane], s->temp[0], w, 0);
931 /* second line is left predicted for interlaced case */
933 decode_plane_bitstream(s, w, plane);
934 left = left_prediction(s, p->data[plane] + p->linesize[plane], s->temp[0], w, left);
938 lefttop = p->data[plane][0];
939 decode_plane_bitstream(s, w, plane);
940 add_median_prediction(s, p->data[plane] + fake_stride, p->data[plane], s->temp[0], w, &left, &lefttop);
946 decode_plane_bitstream(s, w, plane);
948 dst = p->data[plane] + p->linesize[plane] * y;
950 add_median_prediction(s, dst, dst - fake_stride, s->temp[0], w, &left, &lefttop);
956 draw_slice(s, p, height);
957 } else if (s->bitstream_bpp < 24) {
959 int lefty, leftu, leftv;
960 int lefttopy, lefttopu, lefttopv;
963 p->data[0][3] = get_bits(&s->gb, 8);
964 p->data[0][2] = get_bits(&s->gb, 8);
965 p->data[0][1] = get_bits(&s->gb, 8);
966 p->data[0][0] = get_bits(&s->gb, 8);
968 av_log(avctx, AV_LOG_ERROR,
969 "YUY2 output is not implemented yet\n");
970 return AVERROR_PATCHWELCOME;
973 p->data[2][0] = get_bits(&s->gb, 8);
975 p->data[0][1] = get_bits(&s->gb, 8);
977 p->data[1][0] = get_bits(&s->gb, 8);
978 p->data[0][0] = get_bits(&s->gb, 8);
980 switch (s->predictor) {
983 decode_422_bitstream(s, width - 2);
984 lefty = s->hdsp.add_hfyu_left_pred(p->data[0] + 2, s->temp[0],
986 if (!(s->flags & CODEC_FLAG_GRAY)) {
987 leftu = s->hdsp.add_hfyu_left_pred(p->data[1] + 1, s->temp[1], width2 - 1, leftu);
988 leftv = s->hdsp.add_hfyu_left_pred(p->data[2] + 1, s->temp[2], width2 - 1, leftv);
991 for (cy = y = 1; y < s->height; y++, cy++) {
992 uint8_t *ydst, *udst, *vdst;
994 if (s->bitstream_bpp == 12) {
995 decode_gray_bitstream(s, width);
997 ydst = p->data[0] + p->linesize[0] * y;
999 lefty = s->hdsp.add_hfyu_left_pred(ydst, s->temp[0],
1001 if (s->predictor == PLANE) {
1002 if (y > s->interlaced)
1003 s->hdsp.add_bytes(ydst, ydst - fake_ystride, width);
1010 draw_slice(s, p, y);
1012 ydst = p->data[0] + p->linesize[0] * y;
1013 udst = p->data[1] + p->linesize[1] * cy;
1014 vdst = p->data[2] + p->linesize[2] * cy;
1016 decode_422_bitstream(s, width);
1017 lefty = s->hdsp.add_hfyu_left_pred(ydst, s->temp[0],
1019 if (!(s->flags & CODEC_FLAG_GRAY)) {
1020 leftu = s->hdsp.add_hfyu_left_pred(udst, s->temp[1], width2, leftu);
1021 leftv = s->hdsp.add_hfyu_left_pred(vdst, s->temp[2], width2, leftv);
1023 if (s->predictor == PLANE) {
1024 if (cy > s->interlaced) {
1025 s->hdsp.add_bytes(ydst, ydst - fake_ystride, width);
1026 if (!(s->flags & CODEC_FLAG_GRAY)) {
1027 s->hdsp.add_bytes(udst, udst - fake_ustride, width2);
1028 s->hdsp.add_bytes(vdst, vdst - fake_vstride, width2);
1033 draw_slice(s, p, height);
1037 /* first line except first 2 pixels is left predicted */
1038 decode_422_bitstream(s, width - 2);
1039 lefty = s->hdsp.add_hfyu_left_pred(p->data[0] + 2, s->temp[0],
1041 if (!(s->flags & CODEC_FLAG_GRAY)) {
1042 leftu = s->hdsp.add_hfyu_left_pred(p->data[1] + 1, s->temp[1], width2 - 1, leftu);
1043 leftv = s->hdsp.add_hfyu_left_pred(p->data[2] + 1, s->temp[2], width2 - 1, leftv);
1048 /* second line is left predicted for interlaced case */
1049 if (s->interlaced) {
1050 decode_422_bitstream(s, width);
1051 lefty = s->hdsp.add_hfyu_left_pred(p->data[0] + p->linesize[0],
1052 s->temp[0], width, lefty);
1053 if (!(s->flags & CODEC_FLAG_GRAY)) {
1054 leftu = s->hdsp.add_hfyu_left_pred(p->data[1] + p->linesize[2], s->temp[1], width2, leftu);
1055 leftv = s->hdsp.add_hfyu_left_pred(p->data[2] + p->linesize[1], s->temp[2], width2, leftv);
1061 /* next 4 pixels are left predicted too */
1062 decode_422_bitstream(s, 4);
1063 lefty = s->hdsp.add_hfyu_left_pred(p->data[0] + fake_ystride,
1064 s->temp[0], 4, lefty);
1065 if (!(s->flags & CODEC_FLAG_GRAY)) {
1066 leftu = s->hdsp.add_hfyu_left_pred(p->data[1] + fake_ustride, s->temp[1], 2, leftu);
1067 leftv = s->hdsp.add_hfyu_left_pred(p->data[2] + fake_vstride, s->temp[2], 2, leftv);
1070 /* next line except the first 4 pixels is median predicted */
1071 lefttopy = p->data[0][3];
1072 decode_422_bitstream(s, width - 4);
1073 s->hdsp.add_hfyu_median_pred(p->data[0] + fake_ystride + 4,
1074 p->data[0] + 4, s->temp[0],
1075 width - 4, &lefty, &lefttopy);
1076 if (!(s->flags & CODEC_FLAG_GRAY)) {
1077 lefttopu = p->data[1][1];
1078 lefttopv = p->data[2][1];
1079 s->hdsp.add_hfyu_median_pred(p->data[1] + fake_ustride + 2, p->data[1] + 2, s->temp[1], width2 - 2, &leftu, &lefttopu);
1080 s->hdsp.add_hfyu_median_pred(p->data[2] + fake_vstride + 2, p->data[2] + 2, s->temp[2], width2 - 2, &leftv, &lefttopv);
1085 for (; y < height; y++, cy++) {
1086 uint8_t *ydst, *udst, *vdst;
1088 if (s->bitstream_bpp == 12) {
1089 while (2 * cy > y) {
1090 decode_gray_bitstream(s, width);
1091 ydst = p->data[0] + p->linesize[0] * y;
1092 s->hdsp.add_hfyu_median_pred(ydst, ydst - fake_ystride,
1100 draw_slice(s, p, y);
1102 decode_422_bitstream(s, width);
1104 ydst = p->data[0] + p->linesize[0] * y;
1105 udst = p->data[1] + p->linesize[1] * cy;
1106 vdst = p->data[2] + p->linesize[2] * cy;
1108 s->hdsp.add_hfyu_median_pred(ydst, ydst - fake_ystride,
1111 if (!(s->flags & CODEC_FLAG_GRAY)) {
1112 s->hdsp.add_hfyu_median_pred(udst, udst - fake_ustride, s->temp[1], width2, &leftu, &lefttopu);
1113 s->hdsp.add_hfyu_median_pred(vdst, vdst - fake_vstride, s->temp[2], width2, &leftv, &lefttopv);
1117 draw_slice(s, p, height);
1124 const int last_line = (height - 1) * p->linesize[0];
1126 if (s->bitstream_bpp == 32) {
1127 left[A] = p->data[0][last_line + A] = get_bits(&s->gb, 8);
1128 left[R] = p->data[0][last_line + R] = get_bits(&s->gb, 8);
1129 left[G] = p->data[0][last_line + G] = get_bits(&s->gb, 8);
1130 left[B] = p->data[0][last_line + B] = get_bits(&s->gb, 8);
1132 left[R] = p->data[0][last_line + R] = get_bits(&s->gb, 8);
1133 left[G] = p->data[0][last_line + G] = get_bits(&s->gb, 8);
1134 left[B] = p->data[0][last_line + B] = get_bits(&s->gb, 8);
1135 left[A] = p->data[0][last_line + A] = 255;
1136 skip_bits(&s->gb, 8);
1140 switch (s->predictor) {
1143 decode_bgr_bitstream(s, width - 1);
1144 s->hdsp.add_hfyu_left_pred_bgr32(p->data[0] + last_line + 4,
1145 s->temp[0], width - 1, left);
1147 for (y = s->height - 2; y >= 0; y--) { // Yes it is stored upside down.
1148 decode_bgr_bitstream(s, width);
1150 s->hdsp.add_hfyu_left_pred_bgr32(p->data[0] + p->linesize[0] * y,
1151 s->temp[0], width, left);
1152 if (s->predictor == PLANE) {
1153 if (s->bitstream_bpp != 32)
1155 if ((y & s->interlaced) == 0 &&
1156 y < s->height - 1 - s->interlaced) {
1157 s->hdsp.add_bytes(p->data[0] + p->linesize[0] * y,
1158 p->data[0] + p->linesize[0] * y +
1159 fake_ystride, fake_ystride);
1163 // just 1 large slice as this is not possible in reverse order
1164 draw_slice(s, p, height);
1167 av_log(avctx, AV_LOG_ERROR,
1168 "prediction type not supported!\n");
1171 av_log(avctx, AV_LOG_ERROR,
1172 "BGR24 output is not implemented yet\n");
1173 return AVERROR_PATCHWELCOME;
1180 return (get_bits_count(&s->gb) + 31) / 32 * 4 + table_size;
1183 static av_cold int decode_end(AVCodecContext *avctx)
1185 HYuvContext *s = avctx->priv_data;
1188 ff_huffyuv_common_end(s);
1189 av_freep(&s->bitstream_buffer);
1191 for (i = 0; i < 8; i++)
1192 ff_free_vlc(&s->vlc[i]);
1197 AVCodec ff_huffyuv_decoder = {
1199 .long_name = NULL_IF_CONFIG_SMALL("Huffyuv / HuffYUV"),
1200 .type = AVMEDIA_TYPE_VIDEO,
1201 .id = AV_CODEC_ID_HUFFYUV,
1202 .priv_data_size = sizeof(HYuvContext),
1203 .init = decode_init,
1204 .close = decode_end,
1205 .decode = decode_frame,
1206 .capabilities = CODEC_CAP_DR1 | CODEC_CAP_DRAW_HORIZ_BAND |
1207 CODEC_CAP_FRAME_THREADS,
1208 .init_thread_copy = ONLY_IF_THREADS_ENABLED(decode_init_thread_copy),
1211 #if CONFIG_FFVHUFF_DECODER
1212 AVCodec ff_ffvhuff_decoder = {
1214 .long_name = NULL_IF_CONFIG_SMALL("Huffyuv FFmpeg variant"),
1215 .type = AVMEDIA_TYPE_VIDEO,
1216 .id = AV_CODEC_ID_FFVHUFF,
1217 .priv_data_size = sizeof(HYuvContext),
1218 .init = decode_init,
1219 .close = decode_end,
1220 .decode = decode_frame,
1221 .capabilities = CODEC_CAP_DR1 | CODEC_CAP_DRAW_HORIZ_BAND |
1222 CODEC_CAP_FRAME_THREADS,
1223 .init_thread_copy = ONLY_IF_THREADS_ENABLED(decode_init_thread_copy),
1225 #endif /* CONFIG_FFVHUFF_DECODER */