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/imgutils.h"
41 #include "libavutil/pixdesc.h"
43 #define classic_shift_luma_table_size 42
44 static const unsigned char classic_shift_luma[classic_shift_luma_table_size + FF_INPUT_BUFFER_PADDING_SIZE] = {
45 34, 36, 35, 69, 135, 232, 9, 16, 10, 24, 11, 23, 12, 16, 13, 10,
46 14, 8, 15, 8, 16, 8, 17, 20, 16, 10, 207, 206, 205, 236, 11, 8,
47 10, 21, 9, 23, 8, 8, 199, 70, 69, 68, 0,
51 #define classic_shift_chroma_table_size 59
52 static const unsigned char classic_shift_chroma[classic_shift_chroma_table_size + FF_INPUT_BUFFER_PADDING_SIZE] = {
53 66, 36, 37, 38, 39, 40, 41, 75, 76, 77, 110, 239, 144, 81, 82, 83,
54 84, 85, 118, 183, 56, 57, 88, 89, 56, 89, 154, 57, 58, 57, 26, 141,
55 57, 56, 58, 57, 58, 57, 184, 119, 214, 245, 116, 83, 82, 49, 80, 79,
56 78, 77, 44, 75, 41, 40, 39, 38, 37, 36, 34, 0,
60 static const unsigned char classic_add_luma[256] = {
61 3, 9, 5, 12, 10, 35, 32, 29, 27, 50, 48, 45, 44, 41, 39, 37,
62 73, 70, 68, 65, 64, 61, 58, 56, 53, 50, 49, 46, 44, 41, 38, 36,
63 68, 65, 63, 61, 58, 55, 53, 51, 48, 46, 45, 43, 41, 39, 38, 36,
64 35, 33, 32, 30, 29, 27, 26, 25, 48, 47, 46, 44, 43, 41, 40, 39,
65 37, 36, 35, 34, 32, 31, 30, 28, 27, 26, 24, 23, 22, 20, 19, 37,
66 35, 34, 33, 31, 30, 29, 27, 26, 24, 23, 21, 20, 18, 17, 15, 29,
67 27, 26, 24, 22, 21, 19, 17, 16, 14, 26, 25, 23, 21, 19, 18, 16,
68 15, 27, 25, 23, 21, 19, 17, 16, 14, 26, 25, 23, 21, 18, 17, 14,
69 12, 17, 19, 13, 4, 9, 2, 11, 1, 7, 8, 0, 16, 3, 14, 6,
70 12, 10, 5, 15, 18, 11, 10, 13, 15, 16, 19, 20, 22, 24, 27, 15,
71 18, 20, 22, 24, 26, 14, 17, 20, 22, 24, 27, 15, 18, 20, 23, 25,
72 28, 16, 19, 22, 25, 28, 32, 36, 21, 25, 29, 33, 38, 42, 45, 49,
73 28, 31, 34, 37, 40, 42, 44, 47, 49, 50, 52, 54, 56, 57, 59, 60,
74 62, 64, 66, 67, 69, 35, 37, 39, 40, 42, 43, 45, 47, 48, 51, 52,
75 54, 55, 57, 59, 60, 62, 63, 66, 67, 69, 71, 72, 38, 40, 42, 43,
76 46, 47, 49, 51, 26, 28, 30, 31, 33, 34, 18, 19, 11, 13, 7, 8,
79 static const unsigned char classic_add_chroma[256] = {
80 3, 1, 2, 2, 2, 2, 3, 3, 7, 5, 7, 5, 8, 6, 11, 9,
81 7, 13, 11, 10, 9, 8, 7, 5, 9, 7, 6, 4, 7, 5, 8, 7,
82 11, 8, 13, 11, 19, 15, 22, 23, 20, 33, 32, 28, 27, 29, 51, 77,
83 43, 45, 76, 81, 46, 82, 75, 55, 56, 144, 58, 80, 60, 74, 147, 63,
84 143, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79,
85 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 27, 30, 21, 22,
86 17, 14, 5, 6, 100, 54, 47, 50, 51, 53, 106, 107, 108, 109, 110, 111,
87 112, 113, 114, 115, 4, 117, 118, 92, 94, 121, 122, 3, 124, 103, 2, 1,
88 0, 129, 130, 131, 120, 119, 126, 125, 136, 137, 138, 139, 140, 141, 142, 134,
89 135, 132, 133, 104, 64, 101, 62, 57, 102, 95, 93, 59, 61, 28, 97, 96,
90 52, 49, 48, 29, 32, 25, 24, 46, 23, 98, 45, 44, 43, 20, 42, 41,
91 19, 18, 99, 40, 15, 39, 38, 16, 13, 12, 11, 37, 10, 9, 8, 36,
92 7, 128, 127, 105, 123, 116, 35, 34, 33, 145, 31, 79, 42, 146, 78, 26,
93 83, 48, 49, 50, 44, 47, 26, 31, 30, 18, 17, 19, 21, 24, 25, 13,
94 14, 16, 17, 18, 20, 21, 12, 14, 15, 9, 10, 6, 9, 6, 5, 8,
95 6, 12, 8, 10, 7, 9, 6, 4, 6, 2, 2, 3, 3, 3, 3, 2,
98 static int read_len_table(uint8_t *dst, GetBitContext *gb, int n)
102 for (i = 0; i < n;) {
103 repeat = get_bits(gb, 3);
104 val = get_bits(gb, 5);
106 repeat = get_bits(gb, 8);
107 if (i + repeat > n || get_bits_left(gb) < 0) {
108 av_log(NULL, AV_LOG_ERROR, "Error reading huffman table\n");
109 return AVERROR_INVALIDDATA;
117 static int generate_joint_tables(HYuvContext *s)
120 uint16_t *symbols = av_mallocz(5 << VLC_BITS);
124 return AVERROR(ENOMEM);
125 bits = symbols + (1 << VLC_BITS);
126 len = (uint8_t *)(bits + (1 << VLC_BITS));
128 if (s->bitstream_bpp < 24 || s->version > 2) {
130 for (p = 0; p < 4; p++) {
131 int p0 = s->version > 2 ? p : 0;
132 for (i = y = 0; y < s->vlc_n; y++) {
133 int len0 = s->len[p0][y];
134 int limit = VLC_BITS - len0;
135 if (limit <= 0 || !len0)
137 if ((sign_extend(y, 8) & (s->vlc_n-1)) != y)
139 for (u = 0; u < s->vlc_n; u++) {
140 int len1 = s->len[p][u];
141 if (len1 > limit || !len1)
143 if ((sign_extend(u, 8) & (s->vlc_n-1)) != u)
145 av_assert0(i < (1 << VLC_BITS));
146 len[i] = len0 + len1;
147 bits[i] = (s->bits[p0][y] << len1) + s->bits[p][u];
148 symbols[i] = (y << 8) + (u & 0xFF);
152 ff_free_vlc(&s->vlc[4 + p]);
153 if ((ret = ff_init_vlc_sparse(&s->vlc[4 + p], VLC_BITS, i, len, 1, 1,
154 bits, 2, 2, symbols, 2, 2, 0)) < 0)
158 uint8_t (*map)[4] = (uint8_t(*)[4]) s->pix_bgr_map;
159 int i, b, g, r, code;
160 int p0 = s->decorrelate;
161 int p1 = !s->decorrelate;
162 /* Restrict the range to +/-16 because that's pretty much guaranteed
163 * to cover all the combinations that fit in 11 bits total, and it
164 * does not matter if we miss a few rare codes. */
165 for (i = 0, g = -16; g < 16; g++) {
166 int len0 = s->len[p0][g & 255];
167 int limit0 = VLC_BITS - len0;
168 if (limit0 < 2 || !len0)
170 for (b = -16; b < 16; b++) {
171 int len1 = s->len[p1][b & 255];
172 int limit1 = limit0 - len1;
173 if (limit1 < 1 || !len1)
175 code = (s->bits[p0][g & 255] << len1) + s->bits[p1][b & 255];
176 for (r = -16; r < 16; r++) {
177 int len2 = s->len[2][r & 255];
178 if (len2 > limit1 || !len2)
180 av_assert0(i < (1 << VLC_BITS));
181 len[i] = len0 + len1 + len2;
182 bits[i] = (code << len2) + s->bits[2][r & 255];
183 if (s->decorrelate) {
196 ff_free_vlc(&s->vlc[4]);
197 if ((ret = init_vlc(&s->vlc[4], VLC_BITS, i, len, 1, 1,
207 static int read_huffman_tables(HYuvContext *s, const uint8_t *src, int length)
213 if ((ret = init_get_bits(&gb, src, length * 8)) < 0)
217 count = 1 + s->alpha + 2*s->chroma;
219 for (i = 0; i < count; i++) {
220 if ((ret = read_len_table(s->len[i], &gb, s->vlc_n)) < 0)
222 if ((ret = ff_huffyuv_generate_bits_table(s->bits[i], s->len[i], s->vlc_n)) < 0)
224 ff_free_vlc(&s->vlc[i]);
225 if ((ret = init_vlc(&s->vlc[i], VLC_BITS, s->vlc_n, s->len[i], 1, 1,
226 s->bits[i], 4, 4, 0)) < 0)
230 if ((ret = generate_joint_tables(s)) < 0)
233 return (get_bits_count(&gb) + 7) / 8;
236 static int read_old_huffman_tables(HYuvContext *s)
241 init_get_bits(&gb, classic_shift_luma,
242 classic_shift_luma_table_size * 8);
243 if ((ret = read_len_table(s->len[0], &gb, 256)) < 0)
246 init_get_bits(&gb, classic_shift_chroma,
247 classic_shift_chroma_table_size * 8);
248 if ((ret = read_len_table(s->len[1], &gb, 256)) < 0)
251 for (i = 0; i < 256; i++)
252 s->bits[0][i] = classic_add_luma[i];
253 for (i = 0; i < 256; i++)
254 s->bits[1][i] = classic_add_chroma[i];
256 if (s->bitstream_bpp >= 24) {
257 memcpy(s->bits[1], s->bits[0], 256 * sizeof(uint32_t));
258 memcpy(s->len[1], s->len[0], 256 * sizeof(uint8_t));
260 memcpy(s->bits[2], s->bits[1], 256 * sizeof(uint32_t));
261 memcpy(s->len[2], s->len[1], 256 * sizeof(uint8_t));
263 for (i = 0; i < 4; i++) {
264 ff_free_vlc(&s->vlc[i]);
265 if ((ret = init_vlc(&s->vlc[i], VLC_BITS, 256, s->len[i], 1, 1,
266 s->bits[i], 4, 4, 0)) < 0)
270 if ((ret = generate_joint_tables(s)) < 0)
276 static av_cold int decode_end(AVCodecContext *avctx)
278 HYuvContext *s = avctx->priv_data;
281 ff_huffyuv_common_end(s);
282 av_freep(&s->bitstream_buffer);
284 for (i = 0; i < 8; i++)
285 ff_free_vlc(&s->vlc[i]);
290 static av_cold int decode_init(AVCodecContext *avctx)
292 HYuvContext *s = avctx->priv_data;
295 ret = av_image_check_size(avctx->width, avctx->height, 0, avctx);
299 ff_huffyuvdsp_init(&s->hdsp);
300 memset(s->vlc, 0, 4 * sizeof(VLC));
302 s->interlaced = avctx->height > 288;
305 if (avctx->extradata_size) {
306 if ((avctx->bits_per_coded_sample & 7) &&
307 avctx->bits_per_coded_sample != 12)
308 s->version = 1; // do such files exist at all?
309 else if (avctx->extradata_size > 3 && avctx->extradata[3] == 0)
318 s->vlc_n = FFMIN(s->n, MAX_VLC_N);
320 if (s->version >= 2) {
321 int method, interlace;
323 if (avctx->extradata_size < 4)
324 return AVERROR_INVALIDDATA;
326 method = avctx->extradata[0];
327 s->decorrelate = method & 64 ? 1 : 0;
328 s->predictor = method & 63;
329 if (s->version == 2) {
330 s->bitstream_bpp = avctx->extradata[1];
331 if (s->bitstream_bpp == 0)
332 s->bitstream_bpp = avctx->bits_per_coded_sample & ~7;
334 s->bps = (avctx->extradata[1] >> 4) + 1;
336 s->vlc_n = FFMIN(s->n, MAX_VLC_N);
337 s->chroma_h_shift = avctx->extradata[1] & 3;
338 s->chroma_v_shift = (avctx->extradata[1] >> 2) & 3;
339 s->yuv = !!(avctx->extradata[2] & 1);
340 s->chroma= !!(avctx->extradata[2] & 3);
341 s->alpha = !!(avctx->extradata[2] & 4);
343 interlace = (avctx->extradata[2] & 0x30) >> 4;
344 s->interlaced = (interlace == 1) ? 1 : (interlace == 2) ? 0 : s->interlaced;
345 s->context = avctx->extradata[2] & 0x40 ? 1 : 0;
347 if ((ret = read_huffman_tables(s, avctx->extradata + 4,
348 avctx->extradata_size - 4)) < 0)
351 switch (avctx->bits_per_coded_sample & 7) {
361 s->predictor = PLANE;
362 s->decorrelate = avctx->bits_per_coded_sample >= 24;
365 s->predictor = MEDIAN;
369 s->predictor = LEFT; // OLD
373 s->bitstream_bpp = avctx->bits_per_coded_sample & ~7;
376 if ((ret = read_old_huffman_tables(s)) < 0)
380 if (s->version <= 2) {
381 switch (s->bitstream_bpp) {
383 avctx->pix_fmt = AV_PIX_FMT_YUV420P;
388 avctx->pix_fmt = AV_PIX_FMT_YUYV422;
390 avctx->pix_fmt = AV_PIX_FMT_YUV422P;
395 avctx->pix_fmt = AV_PIX_FMT_0RGB32;
397 avctx->pix_fmt = AV_PIX_FMT_BGR24;
400 av_assert0(s->bgr32);
401 avctx->pix_fmt = AV_PIX_FMT_RGB32;
405 ret = AVERROR_INVALIDDATA;
408 av_pix_fmt_get_chroma_sub_sample(avctx->pix_fmt,
412 switch ( (s->chroma<<10) | (s->yuv<<9) | (s->alpha<<8) | ((s->bps-1)<<4) | s->chroma_h_shift | (s->chroma_v_shift<<2)) {
414 avctx->pix_fmt = AV_PIX_FMT_GRAY8;
417 avctx->pix_fmt = AV_PIX_FMT_GRAY16;
420 avctx->pix_fmt = AV_PIX_FMT_GRAY8A;
423 avctx->pix_fmt = AV_PIX_FMT_GBRP;
426 avctx->pix_fmt = AV_PIX_FMT_GBRP9;
429 avctx->pix_fmt = AV_PIX_FMT_GBRP10;
432 avctx->pix_fmt = AV_PIX_FMT_GBRP12;
435 avctx->pix_fmt = AV_PIX_FMT_GBRP14;
438 avctx->pix_fmt = AV_PIX_FMT_GBRP16;
441 avctx->pix_fmt = AV_PIX_FMT_GBRAP;
444 avctx->pix_fmt = AV_PIX_FMT_YUV444P;
447 avctx->pix_fmt = AV_PIX_FMT_YUV444P9;
450 avctx->pix_fmt = AV_PIX_FMT_YUV444P10;
453 avctx->pix_fmt = AV_PIX_FMT_YUV444P12;
456 avctx->pix_fmt = AV_PIX_FMT_YUV444P14;
459 avctx->pix_fmt = AV_PIX_FMT_YUV444P16;
462 avctx->pix_fmt = AV_PIX_FMT_YUV422P;
465 avctx->pix_fmt = AV_PIX_FMT_YUV422P9;
468 avctx->pix_fmt = AV_PIX_FMT_YUV422P10;
471 avctx->pix_fmt = AV_PIX_FMT_YUV422P12;
474 avctx->pix_fmt = AV_PIX_FMT_YUV422P14;
477 avctx->pix_fmt = AV_PIX_FMT_YUV422P16;
480 avctx->pix_fmt = AV_PIX_FMT_YUV411P;
483 avctx->pix_fmt = AV_PIX_FMT_YUV440P;
486 avctx->pix_fmt = AV_PIX_FMT_YUV420P;
489 avctx->pix_fmt = AV_PIX_FMT_YUV420P9;
492 avctx->pix_fmt = AV_PIX_FMT_YUV420P10;
495 avctx->pix_fmt = AV_PIX_FMT_YUV420P12;
498 avctx->pix_fmt = AV_PIX_FMT_YUV420P14;
501 avctx->pix_fmt = AV_PIX_FMT_YUV420P16;
504 avctx->pix_fmt = AV_PIX_FMT_YUV410P;
507 avctx->pix_fmt = AV_PIX_FMT_YUVA444P;
510 avctx->pix_fmt = AV_PIX_FMT_YUVA444P9;
513 avctx->pix_fmt = AV_PIX_FMT_YUVA444P10;
516 avctx->pix_fmt = AV_PIX_FMT_YUVA444P16;
519 avctx->pix_fmt = AV_PIX_FMT_YUVA422P;
522 avctx->pix_fmt = AV_PIX_FMT_YUVA422P9;
525 avctx->pix_fmt = AV_PIX_FMT_YUVA422P10;
528 avctx->pix_fmt = AV_PIX_FMT_YUVA422P16;
531 avctx->pix_fmt = AV_PIX_FMT_YUVA420P;
534 avctx->pix_fmt = AV_PIX_FMT_YUVA420P9;
537 avctx->pix_fmt = AV_PIX_FMT_YUVA420P10;
540 avctx->pix_fmt = AV_PIX_FMT_YUVA420P16;
543 ret = AVERROR_INVALIDDATA;
548 ff_huffyuv_common_init(avctx);
550 if ((avctx->pix_fmt == AV_PIX_FMT_YUV422P || avctx->pix_fmt == AV_PIX_FMT_YUV420P) && avctx->width & 1) {
551 av_log(avctx, AV_LOG_ERROR, "width must be even for this colorspace\n");
552 ret = AVERROR_INVALIDDATA;
555 if (s->predictor == MEDIAN && avctx->pix_fmt == AV_PIX_FMT_YUV422P &&
557 av_log(avctx, AV_LOG_ERROR, "width must be a multiple of 4 "
558 "for this combination of colorspace and predictor type.\n");
559 ret = AVERROR_INVALIDDATA;
563 if ((ret = ff_huffyuv_alloc_temp(s)) < 0) {
564 ff_huffyuv_common_end(s);
574 static av_cold int decode_init_thread_copy(AVCodecContext *avctx)
576 HYuvContext *s = avctx->priv_data;
579 if ((ret = ff_huffyuv_alloc_temp(s)) < 0) {
580 ff_huffyuv_common_end(s);
584 for (i = 0; i < 8; i++)
585 s->vlc[i].table = NULL;
587 if (s->version >= 2) {
588 if ((ret = read_huffman_tables(s, avctx->extradata + 4,
589 avctx->extradata_size)) < 0)
592 if ((ret = read_old_huffman_tables(s)) < 0)
599 /** Subset of GET_VLC for use in hand-roller VLC code */
600 #define VLC_INTERN(dst, table, gb, name, bits, max_depth) \
601 code = table[index][0]; \
602 n = table[index][1]; \
603 if (max_depth > 1 && n < 0) { \
604 LAST_SKIP_BITS(name, gb, bits); \
605 UPDATE_CACHE(name, gb); \
608 index = SHOW_UBITS(name, gb, nb_bits) + code; \
609 code = table[index][0]; \
610 n = table[index][1]; \
611 if (max_depth > 2 && n < 0) { \
612 LAST_SKIP_BITS(name, gb, nb_bits); \
613 UPDATE_CACHE(name, gb); \
616 index = SHOW_UBITS(name, gb, nb_bits) + code; \
617 code = table[index][0]; \
618 n = table[index][1]; \
622 LAST_SKIP_BITS(name, gb, n)
625 #define GET_VLC_DUAL(dst0, dst1, name, gb, dtable, table1, table2, \
626 bits, max_depth, OP) \
628 unsigned int index = SHOW_UBITS(name, gb, bits); \
629 int code, n = dtable[index][1]; \
633 VLC_INTERN(dst0, table1, gb, name, bits, max_depth); \
635 UPDATE_CACHE(re, gb); \
636 index = SHOW_UBITS(name, gb, bits); \
637 VLC_INTERN(dst1, table2, gb, name, bits, max_depth); \
639 code = dtable[index][0]; \
640 OP(dst0, dst1, code); \
641 LAST_SKIP_BITS(name, gb, n); \
645 #define OP8bits(dst0, dst1, code) dst0 = code>>8; dst1 = code
647 #define READ_2PIX(dst0, dst1, plane1) \
648 UPDATE_CACHE(re, &s->gb); \
649 GET_VLC_DUAL(dst0, dst1, re, &s->gb, s->vlc[4+plane1].table, \
650 s->vlc[0].table, s->vlc[plane1].table, VLC_BITS, 3, OP8bits)
652 static void decode_422_bitstream(HYuvContext *s, int count)
655 OPEN_READER(re, &s->gb);
658 icount = get_bits_left(&s->gb) / (32 * 4);
659 if (count >= icount) {
660 for (i = 0; i < icount; i++) {
661 READ_2PIX(s->temp[0][2 * i], s->temp[1][i], 1);
662 READ_2PIX(s->temp[0][2 * i + 1], s->temp[2][i], 2);
664 for (; i < count && BITS_LEFT(re, &s->gb) > 0; i++) {
665 READ_2PIX(s->temp[0][2 * i ], s->temp[1][i], 1);
666 if (BITS_LEFT(re, &s->gb) <= 0) break;
667 READ_2PIX(s->temp[0][2 * i + 1], s->temp[2][i], 2);
669 for (; i < count; i++)
670 s->temp[0][2 * i ] = s->temp[1][i] =
671 s->temp[0][2 * i + 1] = s->temp[2][i] = 0;
673 for (i = 0; i < count; i++) {
674 READ_2PIX(s->temp[0][2 * i], s->temp[1][i], 1);
675 READ_2PIX(s->temp[0][2 * i + 1], s->temp[2][i], 2);
678 CLOSE_READER(re, &s->gb);
681 #define READ_2PIX_PLANE(dst0, dst1, plane, OP) \
682 UPDATE_CACHE(re, &s->gb); \
683 GET_VLC_DUAL(dst0, dst1, re, &s->gb, s->vlc[4+plane].table, \
684 s->vlc[plane].table, s->vlc[plane].table, VLC_BITS, 3, OP)
686 #define OP14bits(dst0, dst1, code) dst0 = code>>8; dst1 = sign_extend(code, 8)
688 /* TODO instead of restarting the read when the code isn't in the first level
689 * of the joint table, jump into the 2nd level of the individual table. */
690 #define READ_2PIX_PLANE16(dst0, dst1, plane){\
691 dst0 = get_vlc2(&s->gb, s->vlc[plane].table, VLC_BITS, 3)<<2;\
692 dst0 += get_bits(&s->gb, 2);\
693 dst1 = get_vlc2(&s->gb, s->vlc[plane].table, VLC_BITS, 3)<<2;\
694 dst1 += get_bits(&s->gb, 2);\
696 static void decode_plane_bitstream(HYuvContext *s, int width, int plane)
698 int i, count = width/2;
701 OPEN_READER(re, &s->gb);
702 if (count >= (get_bits_left(&s->gb)) / (32 * 2)) {
703 for (i = 0; i < count && BITS_LEFT(re, &s->gb) > 0; i++) {
704 READ_2PIX_PLANE(s->temp[0][2 * i], s->temp[0][2 * i + 1], plane, OP8bits);
707 for(i=0; i<count; i++){
708 READ_2PIX_PLANE(s->temp[0][2 * i], s->temp[0][2 * i + 1], plane, OP8bits);
711 if( width&1 && BITS_LEFT(re, &s->gb)>0 ) {
713 int nb_bits, code, n;
714 UPDATE_CACHE(re, &s->gb);
715 index = SHOW_UBITS(re, &s->gb, VLC_BITS);
716 VLC_INTERN(s->temp[0][width-1], s->vlc[plane].table,
717 &s->gb, re, VLC_BITS, 3);
719 CLOSE_READER(re, &s->gb);
720 } else if (s->bps <= 14) {
721 OPEN_READER(re, &s->gb);
722 if (count >= (get_bits_left(&s->gb)) / (32 * 2)) {
723 for (i = 0; i < count && BITS_LEFT(re, &s->gb) > 0; i++) {
724 READ_2PIX_PLANE(s->temp16[0][2 * i], s->temp16[0][2 * i + 1], plane, OP14bits);
727 for(i=0; i<count; i++){
728 READ_2PIX_PLANE(s->temp16[0][2 * i], s->temp16[0][2 * i + 1], plane, OP14bits);
731 if( width&1 && BITS_LEFT(re, &s->gb)>0 ) {
733 int nb_bits, code, n;
734 UPDATE_CACHE(re, &s->gb);
735 index = SHOW_UBITS(re, &s->gb, VLC_BITS);
736 VLC_INTERN(s->temp16[0][width-1], s->vlc[plane].table,
737 &s->gb, re, VLC_BITS, 3);
739 CLOSE_READER(re, &s->gb);
741 if (count >= (get_bits_left(&s->gb)) / (32 * 2)) {
742 for (i = 0; i < count && get_bits_left(&s->gb) > 0; i++) {
743 READ_2PIX_PLANE16(s->temp16[0][2 * i], s->temp16[0][2 * i + 1], plane);
746 for(i=0; i<count; i++){
747 READ_2PIX_PLANE16(s->temp16[0][2 * i], s->temp16[0][2 * i + 1], plane);
750 if( width&1 && get_bits_left(&s->gb)>0 ) {
751 int dst = get_vlc2(&s->gb, s->vlc[plane].table, VLC_BITS, 3)<<2;
752 s->temp16[0][width-1] = dst + get_bits(&s->gb, 2);
757 static void decode_gray_bitstream(HYuvContext *s, int count)
760 OPEN_READER(re, &s->gb);
763 if (count >= (get_bits_left(&s->gb)) / (32 * 2)) {
764 for (i = 0; i < count && BITS_LEFT(re, &s->gb) > 0; i++) {
765 READ_2PIX(s->temp[0][2 * i], s->temp[0][2 * i + 1], 0);
768 for (i = 0; i < count; i++) {
769 READ_2PIX(s->temp[0][2 * i], s->temp[0][2 * i + 1], 0);
772 CLOSE_READER(re, &s->gb);
775 static av_always_inline void decode_bgr_1(HYuvContext *s, int count,
776 int decorrelate, int alpha)
779 OPEN_READER(re, &s->gb);
781 for (i = 0; i < count && BITS_LEFT(re, &s->gb) > 0; i++) {
783 int code, n, nb_bits;
785 UPDATE_CACHE(re, &s->gb);
786 index = SHOW_UBITS(re, &s->gb, VLC_BITS);
787 n = s->vlc[4].table[index][1];
790 code = s->vlc[4].table[index][0];
791 *(uint32_t *) &s->temp[0][4 * i] = s->pix_bgr_map[code];
792 LAST_SKIP_BITS(re, &s->gb, n);
795 VLC_INTERN(s->temp[0][4 * i + G], s->vlc[1].table,
796 &s->gb, re, VLC_BITS, 3);
798 UPDATE_CACHE(re, &s->gb);
799 index = SHOW_UBITS(re, &s->gb, VLC_BITS);
800 VLC_INTERN(code, s->vlc[0].table, &s->gb, re, VLC_BITS, 3);
801 s->temp[0][4 * i + B] = code + s->temp[0][4 * i + G];
803 UPDATE_CACHE(re, &s->gb);
804 index = SHOW_UBITS(re, &s->gb, VLC_BITS);
805 VLC_INTERN(code, s->vlc[2].table, &s->gb, re, VLC_BITS, 3);
806 s->temp[0][4 * i + R] = code + s->temp[0][4 * i + G];
808 VLC_INTERN(s->temp[0][4 * i + B], s->vlc[0].table,
809 &s->gb, re, VLC_BITS, 3);
811 UPDATE_CACHE(re, &s->gb);
812 index = SHOW_UBITS(re, &s->gb, VLC_BITS);
813 VLC_INTERN(s->temp[0][4 * i + G], s->vlc[1].table,
814 &s->gb, re, VLC_BITS, 3);
816 UPDATE_CACHE(re, &s->gb);
817 index = SHOW_UBITS(re, &s->gb, VLC_BITS);
818 VLC_INTERN(s->temp[0][4 * i + R], s->vlc[2].table,
819 &s->gb, re, VLC_BITS, 3);
823 UPDATE_CACHE(re, &s->gb);
824 index = SHOW_UBITS(re, &s->gb, VLC_BITS);
825 VLC_INTERN(s->temp[0][4 * i + A], s->vlc[2].table,
826 &s->gb, re, VLC_BITS, 3);
828 s->temp[0][4 * i + A] = 0;
830 CLOSE_READER(re, &s->gb);
833 static void decode_bgr_bitstream(HYuvContext *s, int count)
835 if (s->decorrelate) {
836 if (s->bitstream_bpp == 24)
837 decode_bgr_1(s, count, 1, 0);
839 decode_bgr_1(s, count, 1, 1);
841 if (s->bitstream_bpp == 24)
842 decode_bgr_1(s, count, 0, 0);
844 decode_bgr_1(s, count, 0, 1);
848 static void draw_slice(HYuvContext *s, AVFrame *frame, int y)
851 int offset[AV_NUM_DATA_POINTERS];
853 if (!s->avctx->draw_horiz_band)
856 h = y - s->last_slice_end;
859 if (s->bitstream_bpp == 12)
864 offset[0] = frame->linesize[0] * y;
865 offset[1] = frame->linesize[1] * cy;
866 offset[2] = frame->linesize[2] * cy;
867 for (i = 3; i < AV_NUM_DATA_POINTERS; i++)
871 s->avctx->draw_horiz_band(s->avctx, frame, offset, y, 3, h);
873 s->last_slice_end = y + h;
876 static int left_prediction(HYuvContext *s, uint8_t *dst, const uint8_t *src, int w, int acc)
879 return s->hdsp.add_hfyu_left_pred(dst, src, w, acc);
881 return s->llviddsp.add_hfyu_left_pred_int16(( uint16_t *)dst, (const uint16_t *)src, s->n-1, w, acc);
885 static void add_bytes(HYuvContext *s, uint8_t *dst, uint8_t *src, int w)
888 s->hdsp.add_bytes(dst, src, w);
890 s->llviddsp.add_int16((uint16_t*)dst, (const uint16_t*)src, s->n - 1, w);
894 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)
897 s->hdsp.add_hfyu_median_pred(dst, src, diff, w, left, left_top);
899 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);
902 static int decode_frame(AVCodecContext *avctx, void *data, int *got_frame,
905 const uint8_t *buf = avpkt->data;
906 int buf_size = avpkt->size;
907 HYuvContext *s = avctx->priv_data;
908 const int width = s->width;
909 const int width2 = s->width >> 1;
910 const int height = s->height;
911 int fake_ystride, fake_ustride, fake_vstride;
912 ThreadFrame frame = { .f = data };
913 AVFrame *const p = data;
914 int table_size = 0, ret;
916 av_fast_padded_malloc(&s->bitstream_buffer,
917 &s->bitstream_buffer_size,
919 if (!s->bitstream_buffer)
920 return AVERROR(ENOMEM);
922 s->bdsp.bswap_buf((uint32_t *) s->bitstream_buffer,
923 (const uint32_t *) buf, buf_size / 4);
925 if ((ret = ff_thread_get_buffer(avctx, &frame, 0)) < 0)
929 table_size = read_huffman_tables(s, s->bitstream_buffer, buf_size);
934 if ((unsigned) (buf_size - table_size) >= INT_MAX / 8)
935 return AVERROR_INVALIDDATA;
937 if ((ret = init_get_bits(&s->gb, s->bitstream_buffer + table_size,
938 (buf_size - table_size) * 8)) < 0)
941 fake_ystride = s->interlaced ? p->linesize[0] * 2 : p->linesize[0];
942 fake_ustride = s->interlaced ? p->linesize[1] * 2 : p->linesize[1];
943 fake_vstride = s->interlaced ? p->linesize[2] * 2 : p->linesize[2];
945 s->last_slice_end = 0;
947 if (s->version > 2) {
949 for(plane = 0; plane < 1 + 2*s->chroma + s->alpha; plane++) {
950 int left, lefttop, y;
953 int fake_stride = fake_ystride;
955 if (s->chroma && (plane == 1 || plane == 2)) {
956 w >>= s->chroma_h_shift;
957 h >>= s->chroma_v_shift;
958 fake_stride = plane == 1 ? fake_ustride : fake_vstride;
961 switch (s->predictor) {
964 decode_plane_bitstream(s, w, plane);
965 left = left_prediction(s, p->data[plane], s->temp[0], w, 0);
967 for (y = 1; y < h; y++) {
968 uint8_t *dst = p->data[plane] + p->linesize[plane]*y;
970 decode_plane_bitstream(s, w, plane);
971 left = left_prediction(s, dst, s->temp[0], w, left);
972 if (s->predictor == PLANE) {
973 if (y > s->interlaced) {
974 add_bytes(s, dst, dst - fake_stride, w);
981 decode_plane_bitstream(s, w, plane);
982 left= left_prediction(s, p->data[plane], s->temp[0], w, 0);
986 /* second line is left predicted for interlaced case */
988 decode_plane_bitstream(s, w, plane);
989 left = left_prediction(s, p->data[plane] + p->linesize[plane], s->temp[0], w, left);
993 lefttop = p->data[plane][0];
994 decode_plane_bitstream(s, w, plane);
995 add_median_prediction(s, p->data[plane] + fake_stride, p->data[plane], s->temp[0], w, &left, &lefttop);
1001 decode_plane_bitstream(s, w, plane);
1003 dst = p->data[plane] + p->linesize[plane] * y;
1005 add_median_prediction(s, dst, dst - fake_stride, s->temp[0], w, &left, &lefttop);
1011 draw_slice(s, p, height);
1012 } else if (s->bitstream_bpp < 24) {
1014 int lefty, leftu, leftv;
1015 int lefttopy, lefttopu, lefttopv;
1018 p->data[0][3] = get_bits(&s->gb, 8);
1019 p->data[0][2] = get_bits(&s->gb, 8);
1020 p->data[0][1] = get_bits(&s->gb, 8);
1021 p->data[0][0] = get_bits(&s->gb, 8);
1023 av_log(avctx, AV_LOG_ERROR,
1024 "YUY2 output is not implemented yet\n");
1025 return AVERROR_PATCHWELCOME;
1028 p->data[2][0] = get_bits(&s->gb, 8);
1030 p->data[0][1] = get_bits(&s->gb, 8);
1032 p->data[1][0] = get_bits(&s->gb, 8);
1033 p->data[0][0] = get_bits(&s->gb, 8);
1035 switch (s->predictor) {
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);
1046 for (cy = y = 1; y < s->height; y++, cy++) {
1047 uint8_t *ydst, *udst, *vdst;
1049 if (s->bitstream_bpp == 12) {
1050 decode_gray_bitstream(s, width);
1052 ydst = p->data[0] + p->linesize[0] * y;
1054 lefty = s->hdsp.add_hfyu_left_pred(ydst, s->temp[0],
1056 if (s->predictor == PLANE) {
1057 if (y > s->interlaced)
1058 s->hdsp.add_bytes(ydst, ydst - fake_ystride, width);
1065 draw_slice(s, p, y);
1067 ydst = p->data[0] + p->linesize[0] * y;
1068 udst = p->data[1] + p->linesize[1] * cy;
1069 vdst = p->data[2] + p->linesize[2] * cy;
1071 decode_422_bitstream(s, width);
1072 lefty = s->hdsp.add_hfyu_left_pred(ydst, s->temp[0],
1074 if (!(s->flags & CODEC_FLAG_GRAY)) {
1075 leftu = s->hdsp.add_hfyu_left_pred(udst, s->temp[1], width2, leftu);
1076 leftv = s->hdsp.add_hfyu_left_pred(vdst, s->temp[2], width2, leftv);
1078 if (s->predictor == PLANE) {
1079 if (cy > s->interlaced) {
1080 s->hdsp.add_bytes(ydst, ydst - fake_ystride, width);
1081 if (!(s->flags & CODEC_FLAG_GRAY)) {
1082 s->hdsp.add_bytes(udst, udst - fake_ustride, width2);
1083 s->hdsp.add_bytes(vdst, vdst - fake_vstride, width2);
1088 draw_slice(s, p, height);
1092 /* first line except first 2 pixels is left predicted */
1093 decode_422_bitstream(s, width - 2);
1094 lefty = s->hdsp.add_hfyu_left_pred(p->data[0] + 2, s->temp[0],
1096 if (!(s->flags & CODEC_FLAG_GRAY)) {
1097 leftu = s->hdsp.add_hfyu_left_pred(p->data[1] + 1, s->temp[1], width2 - 1, leftu);
1098 leftv = s->hdsp.add_hfyu_left_pred(p->data[2] + 1, s->temp[2], width2 - 1, leftv);
1103 /* second line is left predicted for interlaced case */
1104 if (s->interlaced) {
1105 decode_422_bitstream(s, width);
1106 lefty = s->hdsp.add_hfyu_left_pred(p->data[0] + p->linesize[0],
1107 s->temp[0], width, lefty);
1108 if (!(s->flags & CODEC_FLAG_GRAY)) {
1109 leftu = s->hdsp.add_hfyu_left_pred(p->data[1] + p->linesize[2], s->temp[1], width2, leftu);
1110 leftv = s->hdsp.add_hfyu_left_pred(p->data[2] + p->linesize[1], s->temp[2], width2, leftv);
1116 /* next 4 pixels are left predicted too */
1117 decode_422_bitstream(s, 4);
1118 lefty = s->hdsp.add_hfyu_left_pred(p->data[0] + fake_ystride,
1119 s->temp[0], 4, lefty);
1120 if (!(s->flags & CODEC_FLAG_GRAY)) {
1121 leftu = s->hdsp.add_hfyu_left_pred(p->data[1] + fake_ustride, s->temp[1], 2, leftu);
1122 leftv = s->hdsp.add_hfyu_left_pred(p->data[2] + fake_vstride, s->temp[2], 2, leftv);
1125 /* next line except the first 4 pixels is median predicted */
1126 lefttopy = p->data[0][3];
1127 decode_422_bitstream(s, width - 4);
1128 s->hdsp.add_hfyu_median_pred(p->data[0] + fake_ystride + 4,
1129 p->data[0] + 4, s->temp[0],
1130 width - 4, &lefty, &lefttopy);
1131 if (!(s->flags & CODEC_FLAG_GRAY)) {
1132 lefttopu = p->data[1][1];
1133 lefttopv = p->data[2][1];
1134 s->hdsp.add_hfyu_median_pred(p->data[1] + fake_ustride + 2, p->data[1] + 2, s->temp[1], width2 - 2, &leftu, &lefttopu);
1135 s->hdsp.add_hfyu_median_pred(p->data[2] + fake_vstride + 2, p->data[2] + 2, s->temp[2], width2 - 2, &leftv, &lefttopv);
1140 for (; y < height; y++, cy++) {
1141 uint8_t *ydst, *udst, *vdst;
1143 if (s->bitstream_bpp == 12) {
1144 while (2 * cy > y) {
1145 decode_gray_bitstream(s, width);
1146 ydst = p->data[0] + p->linesize[0] * y;
1147 s->hdsp.add_hfyu_median_pred(ydst, ydst - fake_ystride,
1155 draw_slice(s, p, y);
1157 decode_422_bitstream(s, width);
1159 ydst = p->data[0] + p->linesize[0] * y;
1160 udst = p->data[1] + p->linesize[1] * cy;
1161 vdst = p->data[2] + p->linesize[2] * cy;
1163 s->hdsp.add_hfyu_median_pred(ydst, ydst - fake_ystride,
1166 if (!(s->flags & CODEC_FLAG_GRAY)) {
1167 s->hdsp.add_hfyu_median_pred(udst, udst - fake_ustride, s->temp[1], width2, &leftu, &lefttopu);
1168 s->hdsp.add_hfyu_median_pred(vdst, vdst - fake_vstride, s->temp[2], width2, &leftv, &lefttopv);
1172 draw_slice(s, p, height);
1179 const int last_line = (height - 1) * p->linesize[0];
1181 if (s->bitstream_bpp == 32) {
1182 left[A] = p->data[0][last_line + A] = get_bits(&s->gb, 8);
1183 left[R] = p->data[0][last_line + R] = get_bits(&s->gb, 8);
1184 left[G] = p->data[0][last_line + G] = get_bits(&s->gb, 8);
1185 left[B] = p->data[0][last_line + B] = 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);
1190 left[A] = p->data[0][last_line + A] = 255;
1191 skip_bits(&s->gb, 8);
1195 switch (s->predictor) {
1198 decode_bgr_bitstream(s, width - 1);
1199 s->hdsp.add_hfyu_left_pred_bgr32(p->data[0] + last_line + 4,
1200 s->temp[0], width - 1, left);
1202 for (y = s->height - 2; y >= 0; y--) { // Yes it is stored upside down.
1203 decode_bgr_bitstream(s, width);
1205 s->hdsp.add_hfyu_left_pred_bgr32(p->data[0] + p->linesize[0] * y,
1206 s->temp[0], width, left);
1207 if (s->predictor == PLANE) {
1208 if (s->bitstream_bpp != 32)
1210 if (y < s->height - 1 - s->interlaced) {
1211 s->hdsp.add_bytes(p->data[0] + p->linesize[0] * y,
1212 p->data[0] + p->linesize[0] * y +
1213 fake_ystride, 4 * width);
1217 // just 1 large slice as this is not possible in reverse order
1218 draw_slice(s, p, height);
1221 av_log(avctx, AV_LOG_ERROR,
1222 "prediction type not supported!\n");
1225 av_log(avctx, AV_LOG_ERROR,
1226 "BGR24 output is not implemented yet\n");
1227 return AVERROR_PATCHWELCOME;
1234 return (get_bits_count(&s->gb) + 31) / 32 * 4 + table_size;
1237 AVCodec ff_huffyuv_decoder = {
1239 .long_name = NULL_IF_CONFIG_SMALL("Huffyuv / HuffYUV"),
1240 .type = AVMEDIA_TYPE_VIDEO,
1241 .id = AV_CODEC_ID_HUFFYUV,
1242 .priv_data_size = sizeof(HYuvContext),
1243 .init = decode_init,
1244 .close = decode_end,
1245 .decode = decode_frame,
1246 .capabilities = CODEC_CAP_DR1 | CODEC_CAP_DRAW_HORIZ_BAND |
1247 CODEC_CAP_FRAME_THREADS,
1248 .init_thread_copy = ONLY_IF_THREADS_ENABLED(decode_init_thread_copy),
1251 #if CONFIG_FFVHUFF_DECODER
1252 AVCodec ff_ffvhuff_decoder = {
1254 .long_name = NULL_IF_CONFIG_SMALL("Huffyuv FFmpeg variant"),
1255 .type = AVMEDIA_TYPE_VIDEO,
1256 .id = AV_CODEC_ID_FFVHUFF,
1257 .priv_data_size = sizeof(HYuvContext),
1258 .init = decode_init,
1259 .close = decode_end,
1260 .decode = decode_frame,
1261 .capabilities = CODEC_CAP_DR1 | CODEC_CAP_DRAW_HORIZ_BAND |
1262 CODEC_CAP_FRAME_THREADS,
1263 .init_thread_copy = ONLY_IF_THREADS_ENABLED(decode_init_thread_copy),
1265 #endif /* CONFIG_FFVHUFF_DECODER */