4 * Copyright (c) 2002-2003 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
37 #include "libavutil/pixdesc.h"
39 #define classic_shift_luma_table_size 42
40 static const unsigned char classic_shift_luma[classic_shift_luma_table_size + FF_INPUT_BUFFER_PADDING_SIZE] = {
41 34,36,35,69,135,232,9,16,10,24,11,23,12,16,13,10,14,8,15,8,
42 16,8,17,20,16,10,207,206,205,236,11,8,10,21,9,23,8,8,199,70,
47 #define classic_shift_chroma_table_size 59
48 static const unsigned char classic_shift_chroma[classic_shift_chroma_table_size + FF_INPUT_BUFFER_PADDING_SIZE] = {
49 66,36,37,38,39,40,41,75,76,77,110,239,144,81,82,83,84,85,118,183,
50 56,57,88,89,56,89,154,57,58,57,26,141,57,56,58,57,58,57,184,119,
51 214,245,116,83,82,49,80,79,78,77,44,75,41,40,39,38,37,36,34, 0,
55 static const unsigned char classic_add_luma[256] = {
56 3, 9, 5, 12, 10, 35, 32, 29, 27, 50, 48, 45, 44, 41, 39, 37,
57 73, 70, 68, 65, 64, 61, 58, 56, 53, 50, 49, 46, 44, 41, 38, 36,
58 68, 65, 63, 61, 58, 55, 53, 51, 48, 46, 45, 43, 41, 39, 38, 36,
59 35, 33, 32, 30, 29, 27, 26, 25, 48, 47, 46, 44, 43, 41, 40, 39,
60 37, 36, 35, 34, 32, 31, 30, 28, 27, 26, 24, 23, 22, 20, 19, 37,
61 35, 34, 33, 31, 30, 29, 27, 26, 24, 23, 21, 20, 18, 17, 15, 29,
62 27, 26, 24, 22, 21, 19, 17, 16, 14, 26, 25, 23, 21, 19, 18, 16,
63 15, 27, 25, 23, 21, 19, 17, 16, 14, 26, 25, 23, 21, 18, 17, 14,
64 12, 17, 19, 13, 4, 9, 2, 11, 1, 7, 8, 0, 16, 3, 14, 6,
65 12, 10, 5, 15, 18, 11, 10, 13, 15, 16, 19, 20, 22, 24, 27, 15,
66 18, 20, 22, 24, 26, 14, 17, 20, 22, 24, 27, 15, 18, 20, 23, 25,
67 28, 16, 19, 22, 25, 28, 32, 36, 21, 25, 29, 33, 38, 42, 45, 49,
68 28, 31, 34, 37, 40, 42, 44, 47, 49, 50, 52, 54, 56, 57, 59, 60,
69 62, 64, 66, 67, 69, 35, 37, 39, 40, 42, 43, 45, 47, 48, 51, 52,
70 54, 55, 57, 59, 60, 62, 63, 66, 67, 69, 71, 72, 38, 40, 42, 43,
71 46, 47, 49, 51, 26, 28, 30, 31, 33, 34, 18, 19, 11, 13, 7, 8,
74 static const unsigned char classic_add_chroma[256] = {
75 3, 1, 2, 2, 2, 2, 3, 3, 7, 5, 7, 5, 8, 6, 11, 9,
76 7, 13, 11, 10, 9, 8, 7, 5, 9, 7, 6, 4, 7, 5, 8, 7,
77 11, 8, 13, 11, 19, 15, 22, 23, 20, 33, 32, 28, 27, 29, 51, 77,
78 43, 45, 76, 81, 46, 82, 75, 55, 56,144, 58, 80, 60, 74,147, 63,
79 143, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79,
80 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 27, 30, 21, 22,
81 17, 14, 5, 6,100, 54, 47, 50, 51, 53,106,107,108,109,110,111,
82 112,113,114,115, 4,117,118, 92, 94,121,122, 3,124,103, 2, 1,
83 0,129,130,131,120,119,126,125,136,137,138,139,140,141,142,134,
84 135,132,133,104, 64,101, 62, 57,102, 95, 93, 59, 61, 28, 97, 96,
85 52, 49, 48, 29, 32, 25, 24, 46, 23, 98, 45, 44, 43, 20, 42, 41,
86 19, 18, 99, 40, 15, 39, 38, 16, 13, 12, 11, 37, 10, 9, 8, 36,
87 7,128,127,105,123,116, 35, 34, 33,145, 31, 79, 42,146, 78, 26,
88 83, 48, 49, 50, 44, 47, 26, 31, 30, 18, 17, 19, 21, 24, 25, 13,
89 14, 16, 17, 18, 20, 21, 12, 14, 15, 9, 10, 6, 9, 6, 5, 8,
90 6, 12, 8, 10, 7, 9, 6, 4, 6, 2, 2, 3, 3, 3, 3, 2,
93 static int read_len_table(uint8_t *dst, GetBitContext *gb, int n)
98 repeat = get_bits(gb, 3);
99 val = get_bits(gb, 5);
101 repeat = get_bits(gb, 8);
102 if (i + repeat > n || get_bits_left(gb) < 0) {
103 av_log(NULL, AV_LOG_ERROR, "Error reading huffman table\n");
112 static int generate_joint_tables(HYuvContext *s)
114 uint16_t symbols[1 << VLC_BITS];
115 uint16_t bits[1 << VLC_BITS];
116 uint8_t len[1 << VLC_BITS];
119 if (s->bitstream_bpp < 24 || s->version > 2) {
121 for (p = 0; p < 4; p++) {
122 int p0 = s->version > 2 ? p : 0;
123 for (i = y = 0; y < s->n; y++) {
124 int len0 = s->len[p0][y];
125 int limit = VLC_BITS - len0;
126 if(limit <= 0 || !len0)
128 for (u = 0; u < s->n; u++) {
129 int len1 = s->len[p][u];
130 if (len1 > limit || !len1)
132 av_assert0(i < (1 << VLC_BITS));
133 len[i] = len0 + len1;
134 bits[i] = (s->bits[p0][y] << len1) + s->bits[p][u];
135 symbols[i] = (y << 8) + u; //FIXME
136 if(symbols[i] != 0xffff) // reserved to mean "invalid"
140 ff_free_vlc(&s->vlc[4 + p]);
141 if ((ret = ff_init_vlc_sparse(&s->vlc[4 + p], VLC_BITS, i, len, 1, 1,
142 bits, 2, 2, symbols, 2, 2, 0)) < 0)
146 uint8_t (*map)[4] = (uint8_t(*)[4])s->pix_bgr_map;
147 int i, b, g, r, code;
148 int p0 = s->decorrelate;
149 int p1 = !s->decorrelate;
150 // restrict the range to +/-16 because that's pretty much guaranteed to
151 // cover all the combinations that fit in 11 bits total, and it doesn't
152 // matter if we miss a few rare codes.
153 for (i = 0, g = -16; g < 16; g++) {
154 int len0 = s->len[p0][g & 255];
155 int limit0 = VLC_BITS - len0;
156 if (limit0 < 2 || !len0)
158 for (b = -16; b < 16; b++) {
159 int len1 = s->len[p1][b & 255];
160 int limit1 = limit0 - len1;
161 if (limit1 < 1 || !len1)
163 code = (s->bits[p0][g & 255] << len1) + s->bits[p1][b & 255];
164 for (r = -16; r < 16; r++) {
165 int len2 = s->len[2][r & 255];
166 if (len2 > limit1 || !len2)
168 av_assert0(i < (1 << VLC_BITS));
169 len[i] = len0 + len1 + len2;
170 bits[i] = (code << len2) + s->bits[2][r & 255];
171 if (s->decorrelate) {
184 ff_free_vlc(&s->vlc[4]);
185 if ((ret = init_vlc(&s->vlc[4], VLC_BITS, i, len, 1, 1, bits, 2, 2, 0)) < 0)
191 static int read_huffman_tables(HYuvContext *s, const uint8_t *src, int length)
198 init_get_bits(&gb, src, length * 8);
201 count = 1 + s->alpha + 2*s->chroma;
203 for (i = 0; i < count; i++) {
204 if (read_len_table(s->len[i], &gb, s->n) < 0)
206 if (ff_huffyuv_generate_bits_table(s->bits[i], s->len[i], s->n) < 0) {
209 ff_free_vlc(&s->vlc[i]);
210 if ((ret = init_vlc(&s->vlc[i], VLC_BITS, s->n, s->len[i], 1, 1,
211 s->bits[i], 4, 4, 0)) < 0)
215 if ((ret = generate_joint_tables(s)) < 0)
218 return (get_bits_count(&gb) + 7) / 8;
221 static int read_old_huffman_tables(HYuvContext *s)
227 init_get_bits(&gb, classic_shift_luma,
228 classic_shift_luma_table_size * 8);
229 if (read_len_table(s->len[0], &gb, 256) < 0)
232 init_get_bits(&gb, classic_shift_chroma,
233 classic_shift_chroma_table_size * 8);
234 if (read_len_table(s->len[1], &gb, 256) < 0)
237 for(i=0; i<256; i++) s->bits[0][i] = classic_add_luma [i];
238 for(i=0; i<256; i++) s->bits[1][i] = classic_add_chroma[i];
240 if (s->bitstream_bpp >= 24) {
241 memcpy(s->bits[1], s->bits[0], 256 * sizeof(uint32_t));
242 memcpy(s->len[1] , s->len [0], 256 * sizeof(uint8_t));
244 memcpy(s->bits[2], s->bits[1], 256 * sizeof(uint32_t));
245 memcpy(s->len[2] , s->len [1], 256 * sizeof(uint8_t));
247 for (i = 0; i < 4; i++) {
248 ff_free_vlc(&s->vlc[i]);
249 if ((ret = init_vlc(&s->vlc[i], VLC_BITS, 256, s->len[i], 1, 1,
250 s->bits[i], 4, 4, 0)) < 0)
254 if ((ret = generate_joint_tables(s)) < 0)
260 static av_cold int decode_init(AVCodecContext *avctx)
262 HYuvContext *s = avctx->priv_data;
264 ff_huffyuv_common_init(avctx);
265 memset(s->vlc, 0, 4 * sizeof(VLC));
267 s->interlaced = s->height > 288;
271 if (avctx->extradata_size) {
272 if ((avctx->bits_per_coded_sample & 7) &&
273 avctx->bits_per_coded_sample != 12)
274 s->version = 1; // do such files exist at all?
275 else if (avctx->extradata_size > 3 && avctx->extradata[3] == 0)
285 if (s->version >= 2) {
286 int method, interlace;
288 if (avctx->extradata_size < 4)
291 method = ((uint8_t*)avctx->extradata)[0];
292 s->decorrelate = method & 64 ? 1 : 0;
293 s->predictor = method & 63;
294 if (s->version == 2) {
295 s->bitstream_bpp = ((uint8_t*)avctx->extradata)[1];
296 if (s->bitstream_bpp == 0)
297 s->bitstream_bpp = avctx->bits_per_coded_sample & ~7;
299 s->bps = (avctx->extradata[1] >> 4) + 1;
301 s->chroma_h_shift = avctx->extradata[1] & 3;
302 s->chroma_v_shift = (avctx->extradata[1] >> 2) & 3;
303 s->yuv = !!(((uint8_t*)avctx->extradata)[2] & 1);
304 s->chroma= !!(((uint8_t*)avctx->extradata)[2] & 3);
305 s->alpha = !!(((uint8_t*)avctx->extradata)[2] & 4);
307 interlace = (((uint8_t*)avctx->extradata)[2] & 0x30) >> 4;
308 s->interlaced = (interlace == 1) ? 1 : (interlace == 2) ? 0 : s->interlaced;
309 s->context = ((uint8_t*)avctx->extradata)[2] & 0x40 ? 1 : 0;
311 if ( read_huffman_tables(s, ((uint8_t*)avctx->extradata) + 4,
312 avctx->extradata_size - 4) < 0)
313 return AVERROR_INVALIDDATA;
315 switch (avctx->bits_per_coded_sample & 7) {
325 s->predictor = PLANE;
326 s->decorrelate = avctx->bits_per_coded_sample >= 24;
329 s->predictor = MEDIAN;
333 s->predictor = LEFT; //OLD
337 s->bitstream_bpp = avctx->bits_per_coded_sample & ~7;
340 if (read_old_huffman_tables(s) < 0)
341 return AVERROR_INVALIDDATA;
344 if (s->version <= 2) {
345 switch (s->bitstream_bpp) {
347 avctx->pix_fmt = AV_PIX_FMT_YUV420P;
352 avctx->pix_fmt = AV_PIX_FMT_YUYV422;
354 avctx->pix_fmt = AV_PIX_FMT_YUV422P;
361 avctx->pix_fmt = AV_PIX_FMT_RGB32;
364 avctx->pix_fmt = AV_PIX_FMT_BGR24;
368 return AVERROR_INVALIDDATA;
370 av_pix_fmt_get_chroma_sub_sample(avctx->pix_fmt,
374 switch ( (s->chroma<<10) | (s->yuv<<9) | (s->alpha<<8) | ((s->bps-1)<<4) | s->chroma_h_shift | (s->chroma_v_shift<<2)) {
376 avctx->pix_fmt = AV_PIX_FMT_GRAY8;
379 avctx->pix_fmt = AV_PIX_FMT_GRAY8A;
382 avctx->pix_fmt = AV_PIX_FMT_GBRP;
385 avctx->pix_fmt = AV_PIX_FMT_GBRAP;
388 avctx->pix_fmt = AV_PIX_FMT_YUV444P;
391 avctx->pix_fmt = AV_PIX_FMT_YUV444P9;
394 avctx->pix_fmt = AV_PIX_FMT_YUV444P10;
397 avctx->pix_fmt = AV_PIX_FMT_YUV444P12;
400 avctx->pix_fmt = AV_PIX_FMT_YUV444P14;
403 avctx->pix_fmt = AV_PIX_FMT_YUV422P;
406 avctx->pix_fmt = AV_PIX_FMT_YUV422P9;
409 avctx->pix_fmt = AV_PIX_FMT_YUV422P10;
412 avctx->pix_fmt = AV_PIX_FMT_YUV422P12;
415 avctx->pix_fmt = AV_PIX_FMT_YUV422P14;
418 avctx->pix_fmt = AV_PIX_FMT_YUV411P;
421 avctx->pix_fmt = AV_PIX_FMT_YUV440P;
424 avctx->pix_fmt = AV_PIX_FMT_YUV420P;
427 avctx->pix_fmt = AV_PIX_FMT_YUV420P9;
430 avctx->pix_fmt = AV_PIX_FMT_YUV420P10;
433 avctx->pix_fmt = AV_PIX_FMT_YUV420P12;
436 avctx->pix_fmt = AV_PIX_FMT_YUV420P14;
439 avctx->pix_fmt = AV_PIX_FMT_YUV410P;
442 avctx->pix_fmt = AV_PIX_FMT_YUVA444P;
445 avctx->pix_fmt = AV_PIX_FMT_YUVA444P9;
448 avctx->pix_fmt = AV_PIX_FMT_YUVA444P10;
451 avctx->pix_fmt = AV_PIX_FMT_YUVA422P;
454 avctx->pix_fmt = AV_PIX_FMT_YUVA422P9;
457 avctx->pix_fmt = AV_PIX_FMT_YUVA422P10;
460 avctx->pix_fmt = AV_PIX_FMT_YUVA420P;
463 avctx->pix_fmt = AV_PIX_FMT_YUVA420P9;
466 avctx->pix_fmt = AV_PIX_FMT_YUVA420P10;
469 return AVERROR_INVALIDDATA;
474 if ((avctx->pix_fmt == AV_PIX_FMT_YUV422P || avctx->pix_fmt == AV_PIX_FMT_YUV420P) && avctx->width & 1) {
475 av_log(avctx, AV_LOG_ERROR, "width must be even for this colorspace\n");
476 return AVERROR_INVALIDDATA;
478 if (s->predictor == MEDIAN && avctx->pix_fmt == AV_PIX_FMT_YUV422P && avctx->width%4) {
479 av_log(avctx, AV_LOG_ERROR, "width must be a multiple of 4 this colorspace and predictor\n");
480 return AVERROR_INVALIDDATA;
482 if (ff_huffyuv_alloc_temp(s)) {
483 ff_huffyuv_common_end(s);
484 return AVERROR(ENOMEM);
490 static av_cold int decode_init_thread_copy(AVCodecContext *avctx)
492 HYuvContext *s = avctx->priv_data;
495 if (ff_huffyuv_alloc_temp(s)) {
496 ff_huffyuv_common_end(s);
497 return AVERROR(ENOMEM);
500 for (i = 0; i < 8; i++)
501 s->vlc[i].table = NULL;
503 if (s->version >= 2) {
504 if (read_huffman_tables(s, ((uint8_t*)avctx->extradata) + 4,
505 avctx->extradata_size) < 0)
506 return AVERROR_INVALIDDATA;
508 if (read_old_huffman_tables(s) < 0)
509 return AVERROR_INVALIDDATA;
515 /* TODO instead of restarting the read when the code isn't in the first level
516 * of the joint table, jump into the 2nd level of the individual table. */
517 #define READ_2PIX(dst0, dst1, plane1){\
518 uint16_t code = get_vlc2(&s->gb, s->vlc[4+plane1].table, VLC_BITS, 1);\
523 dst0 = get_vlc2(&s->gb, s->vlc[0].table, VLC_BITS, 3);\
524 dst1 = get_vlc2(&s->gb, s->vlc[plane1].table, VLC_BITS, 3);\
528 static void decode_422_bitstream(HYuvContext *s, int count)
534 if (count >= (get_bits_left(&s->gb)) / (31 * 4)) {
535 for (i = 0; i < count && get_bits_left(&s->gb) > 0; i++) {
536 READ_2PIX(s->temp[0][2 * i ], s->temp[1][i], 1);
537 READ_2PIX(s->temp[0][2 * i + 1], s->temp[2][i], 2);
539 for (; i < count; i++)
540 s->temp[0][2 * i ] = s->temp[1][i] =
541 s->temp[0][2 * i + 1] = s->temp[2][i] = 128;
543 for (i = 0; i < count; i++) {
544 READ_2PIX(s->temp[0][2 * i ], s->temp[1][i], 1);
545 READ_2PIX(s->temp[0][2 * i + 1], s->temp[2][i], 2);
550 #define READ_2PIX_PLANE(dst0, dst1, plane){\
551 uint16_t code = get_vlc2(&s->gb, s->vlc[4+plane].table, VLC_BITS, 1);\
556 dst0 = get_vlc2(&s->gb, s->vlc[plane].table, VLC_BITS, 3);\
557 dst1 = get_vlc2(&s->gb, s->vlc[plane].table, VLC_BITS, 3);\
560 #define READ_2PIX_PLANE16(dst0, dst1, plane){\
561 dst0 = get_vlc2(&s->gb, s->vlc[plane].table, VLC_BITS, 3);\
562 dst1 = get_vlc2(&s->gb, s->vlc[plane].table, VLC_BITS, 3);\
564 static void decode_plane_bitstream(HYuvContext *s, int count, int plane)
571 if (count >= (get_bits_left(&s->gb)) / (31 * 2)) {
572 for (i = 0; i < count && get_bits_left(&s->gb) > 0; i++) {
573 READ_2PIX_PLANE(s->temp[0][2 * i], s->temp[0][2 * i + 1], plane);
576 for(i=0; i<count; i++){
577 READ_2PIX_PLANE(s->temp[0][2 * i], s->temp[0][2 * i + 1], plane);
581 if (count >= (get_bits_left(&s->gb)) / (31 * 2)) {
582 for (i = 0; i < count && get_bits_left(&s->gb) > 0; i++) {
583 READ_2PIX_PLANE16(s->temp16[0][2 * i], s->temp16[0][2 * i + 1], plane);
586 for(i=0; i<count; i++){
587 READ_2PIX_PLANE16(s->temp16[0][2 * i], s->temp16[0][2 * i + 1], plane);
593 static void decode_gray_bitstream(HYuvContext *s, int count)
599 if (count >= (get_bits_left(&s->gb)) / (31 * 2)) {
600 for (i = 0; i < count && get_bits_left(&s->gb) > 0; i++) {
601 READ_2PIX(s->temp[0][2 * i], s->temp[0][2 * i + 1], 0);
604 for(i=0; i<count; i++){
605 READ_2PIX(s->temp[0][2 * i], s->temp[0][2 * i + 1], 0);
610 static av_always_inline void decode_bgr_1(HYuvContext *s, int count,
611 int decorrelate, int alpha)
614 for (i = 0; i < count; i++) {
615 int code = get_vlc2(&s->gb, s->vlc[4].table, VLC_BITS, 1);
617 *(uint32_t*)&s->temp[0][4 * i] = s->pix_bgr_map[code];
618 } else if(decorrelate) {
619 s->temp[0][4 * i + G] = get_vlc2(&s->gb, s->vlc[1].table, VLC_BITS, 3);
620 s->temp[0][4 * i + B] = get_vlc2(&s->gb, s->vlc[0].table, VLC_BITS, 3) +
621 s->temp[0][4 * i + G];
622 s->temp[0][4 * i + R] = get_vlc2(&s->gb, s->vlc[2].table, VLC_BITS, 3) +
623 s->temp[0][4 * i + G];
625 s->temp[0][4 * i + B] = get_vlc2(&s->gb, s->vlc[0].table, VLC_BITS, 3);
626 s->temp[0][4 * i + G] = get_vlc2(&s->gb, s->vlc[1].table, VLC_BITS, 3);
627 s->temp[0][4 * i + R] = get_vlc2(&s->gb, s->vlc[2].table, VLC_BITS, 3);
630 s->temp[0][4 * i + A] = get_vlc2(&s->gb, s->vlc[2].table, VLC_BITS, 3);
634 static void decode_bgr_bitstream(HYuvContext *s, int count)
636 if (s->decorrelate) {
637 if (s->bitstream_bpp==24)
638 decode_bgr_1(s, count, 1, 0);
640 decode_bgr_1(s, count, 1, 1);
642 if (s->bitstream_bpp==24)
643 decode_bgr_1(s, count, 0, 0);
645 decode_bgr_1(s, count, 0, 1);
649 static void draw_slice(HYuvContext *s, AVFrame *frame, int y)
652 int offset[AV_NUM_DATA_POINTERS];
654 if (s->avctx->draw_horiz_band==NULL)
657 h = y - s->last_slice_end;
660 if (s->bitstream_bpp == 12) {
666 offset[0] = frame->linesize[0] * y;
667 offset[1] = frame->linesize[1] * cy;
668 offset[2] = frame->linesize[2] * cy;
669 for (i = 3; i < AV_NUM_DATA_POINTERS; i++)
673 s->avctx->draw_horiz_band(s->avctx, frame, offset, y, 3, h);
675 s->last_slice_end = y + h;
678 static int left_prediction(HYuvContext *s, uint8_t *dst, const uint8_t *src, int w, int acc)
681 return s->dsp.add_hfyu_left_prediction(dst, src, w, acc);
683 return s->llviddsp.add_hfyu_left_prediction_int16(( uint16_t *)dst, (const uint16_t *)src, s->n-1, w, acc);
687 static void add_bytes(HYuvContext *s, uint8_t *dst, uint8_t *src, int w)
690 s->dsp.add_bytes(dst, src, w);
692 s->llviddsp.add_int16((uint16_t*)dst, (const uint16_t*)src, s->n - 1, w);
696 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)
699 s->dsp.add_hfyu_median_prediction(dst, src, diff, w, left, left_top);
701 s->llviddsp.add_hfyu_median_prediction_int16((uint16_t *)dst, (const uint16_t *)src, (const uint16_t *)diff, s->n-1, w, left, left_top);
704 static int decode_frame(AVCodecContext *avctx, void *data, int *got_frame,
707 const uint8_t *buf = avpkt->data;
708 int buf_size = avpkt->size;
709 HYuvContext *s = avctx->priv_data;
710 const int width = s->width;
711 const int width2 = s->width>>1;
712 const int height = s->height;
713 int fake_ystride, fake_ustride, fake_vstride;
714 ThreadFrame frame = { .f = data };
715 AVFrame * const p = data;
716 int table_size = 0, ret;
718 av_fast_padded_malloc(&s->bitstream_buffer,
719 &s->bitstream_buffer_size,
721 if (!s->bitstream_buffer)
722 return AVERROR(ENOMEM);
724 s->dsp.bswap_buf((uint32_t*)s->bitstream_buffer,
725 (const uint32_t*)buf, buf_size / 4);
727 if ((ret = ff_thread_get_buffer(avctx, &frame, 0)) < 0)
731 table_size = read_huffman_tables(s, s->bitstream_buffer, buf_size);
733 return AVERROR_INVALIDDATA;
736 if ((unsigned)(buf_size-table_size) >= INT_MAX / 8)
737 return AVERROR_INVALIDDATA;
739 init_get_bits(&s->gb, s->bitstream_buffer+table_size,
740 (buf_size-table_size) * 8);
742 fake_ystride = s->interlaced ? p->linesize[0] * 2 : p->linesize[0];
743 fake_ustride = s->interlaced ? p->linesize[1] * 2 : p->linesize[1];
744 fake_vstride = s->interlaced ? p->linesize[2] * 2 : p->linesize[2];
746 s->last_slice_end = 0;
748 if (s->version > 2) {
750 for(plane = 0; plane < 1 + 2*s->chroma + s->alpha; plane++) {
751 int left, lefttop, y;
754 int fake_stride = fake_ystride;
756 if (s->chroma && (plane == 1 || plane == 2)) {
757 w >>= s->chroma_h_shift;
758 h >>= s->chroma_v_shift;
759 fake_stride = plane == 1 ? fake_ustride : fake_vstride;
762 switch (s->predictor) {
765 decode_plane_bitstream(s, w, plane);
766 left = left_prediction(s, p->data[plane], s->temp[0], w, 0);
768 for (y = 1; y < h; y++) {
769 uint8_t *dst = p->data[plane] + p->linesize[plane]*y;
771 decode_plane_bitstream(s, w, plane);
772 left = left_prediction(s, dst, s->temp[0], w, left);
773 if (s->predictor == PLANE) {
774 if (y > s->interlaced) {
775 add_bytes(s, dst, dst - fake_stride, w);
782 decode_plane_bitstream(s, w, plane);
783 left= left_prediction(s, p->data[plane], s->temp[0], w, 0);
787 /* second line is left predicted for interlaced case */
789 decode_plane_bitstream(s, w, plane);
790 left = left_prediction(s, p->data[plane] + p->linesize[plane], s->temp[0], w, left);
794 lefttop = p->data[plane][0];
795 decode_plane_bitstream(s, w, plane);
796 add_median_prediction(s, p->data[plane] + fake_stride, p->data[plane], s->temp[0], w, &left, &lefttop);
802 decode_plane_bitstream(s, w, plane);
804 dst = p->data[plane] + p->linesize[plane] * y;
806 add_median_prediction(s, dst, dst - fake_stride, s->temp[0], w, &left, &lefttop);
812 draw_slice(s, p, height);
813 } else if (s->bitstream_bpp < 24) {
815 int lefty, leftu, leftv;
816 int lefttopy, lefttopu, lefttopv;
819 p->data[0][3] = get_bits(&s->gb, 8);
820 p->data[0][2] = get_bits(&s->gb, 8);
821 p->data[0][1] = get_bits(&s->gb, 8);
822 p->data[0][0] = get_bits(&s->gb, 8);
824 av_log(avctx, AV_LOG_ERROR,
825 "YUY2 output is not implemented yet\n");
826 return AVERROR_PATCHWELCOME;
829 leftv = p->data[2][0] = get_bits(&s->gb, 8);
830 lefty = p->data[0][1] = get_bits(&s->gb, 8);
831 leftu = p->data[1][0] = get_bits(&s->gb, 8);
832 p->data[0][0] = get_bits(&s->gb, 8);
834 switch (s->predictor) {
837 decode_422_bitstream(s, width-2);
838 lefty = s->dsp.add_hfyu_left_prediction(p->data[0] + 2, s->temp[0], width-2, lefty);
839 if (!(s->flags&CODEC_FLAG_GRAY)) {
840 leftu = s->dsp.add_hfyu_left_prediction(p->data[1] + 1, s->temp[1], width2 - 1, leftu);
841 leftv = s->dsp.add_hfyu_left_prediction(p->data[2] + 1, s->temp[2], width2 - 1, leftv);
844 for (cy = y = 1; y < s->height; y++, cy++) {
845 uint8_t *ydst, *udst, *vdst;
847 if (s->bitstream_bpp == 12) {
848 decode_gray_bitstream(s, width);
850 ydst = p->data[0] + p->linesize[0] * y;
852 lefty = s->dsp.add_hfyu_left_prediction(ydst, s->temp[0], width, lefty);
853 if (s->predictor == PLANE) {
854 if (y > s->interlaced)
855 s->dsp.add_bytes(ydst, ydst - fake_ystride, width);
858 if (y >= s->height) break;
863 ydst = p->data[0] + p->linesize[0]*y;
864 udst = p->data[1] + p->linesize[1]*cy;
865 vdst = p->data[2] + p->linesize[2]*cy;
867 decode_422_bitstream(s, width);
868 lefty = s->dsp.add_hfyu_left_prediction(ydst, s->temp[0], width, lefty);
869 if (!(s->flags & CODEC_FLAG_GRAY)) {
870 leftu= s->dsp.add_hfyu_left_prediction(udst, s->temp[1], width2, leftu);
871 leftv= s->dsp.add_hfyu_left_prediction(vdst, s->temp[2], width2, leftv);
873 if (s->predictor == PLANE) {
874 if (cy > s->interlaced) {
875 s->dsp.add_bytes(ydst, ydst - fake_ystride, width);
876 if (!(s->flags & CODEC_FLAG_GRAY)) {
877 s->dsp.add_bytes(udst, udst - fake_ustride, width2);
878 s->dsp.add_bytes(vdst, vdst - fake_vstride, width2);
883 draw_slice(s, p, height);
887 /* first line except first 2 pixels is left predicted */
888 decode_422_bitstream(s, width - 2);
889 lefty= s->dsp.add_hfyu_left_prediction(p->data[0] + 2, s->temp[0], width - 2, lefty);
890 if (!(s->flags & CODEC_FLAG_GRAY)) {
891 leftu = s->dsp.add_hfyu_left_prediction(p->data[1] + 1, s->temp[1], width2 - 1, leftu);
892 leftv = s->dsp.add_hfyu_left_prediction(p->data[2] + 1, s->temp[2], width2 - 1, leftv);
897 /* second line is left predicted for interlaced case */
899 decode_422_bitstream(s, width);
900 lefty = s->dsp.add_hfyu_left_prediction(p->data[0] + p->linesize[0], s->temp[0], width, lefty);
901 if (!(s->flags & CODEC_FLAG_GRAY)) {
902 leftu = s->dsp.add_hfyu_left_prediction(p->data[1] + p->linesize[2], s->temp[1], width2, leftu);
903 leftv = s->dsp.add_hfyu_left_prediction(p->data[2] + p->linesize[1], s->temp[2], width2, leftv);
908 /* next 4 pixels are left predicted too */
909 decode_422_bitstream(s, 4);
910 lefty = s->dsp.add_hfyu_left_prediction(p->data[0] + fake_ystride, s->temp[0], 4, lefty);
911 if (!(s->flags&CODEC_FLAG_GRAY)) {
912 leftu = s->dsp.add_hfyu_left_prediction(p->data[1] + fake_ustride, s->temp[1], 2, leftu);
913 leftv = s->dsp.add_hfyu_left_prediction(p->data[2] + fake_vstride, s->temp[2], 2, leftv);
916 /* next line except the first 4 pixels is median predicted */
917 lefttopy = p->data[0][3];
918 decode_422_bitstream(s, width - 4);
919 s->dsp.add_hfyu_median_prediction(p->data[0] + fake_ystride+4, p->data[0]+4, s->temp[0], width-4, &lefty, &lefttopy);
920 if (!(s->flags&CODEC_FLAG_GRAY)) {
921 lefttopu = p->data[1][1];
922 lefttopv = p->data[2][1];
923 s->dsp.add_hfyu_median_prediction(p->data[1] + fake_ustride+2, p->data[1] + 2, s->temp[1], width2 - 2, &leftu, &lefttopu);
924 s->dsp.add_hfyu_median_prediction(p->data[2] + fake_vstride+2, p->data[2] + 2, s->temp[2], width2 - 2, &leftv, &lefttopv);
928 for (; y<height; y++, cy++) {
929 uint8_t *ydst, *udst, *vdst;
931 if (s->bitstream_bpp == 12) {
933 decode_gray_bitstream(s, width);
934 ydst = p->data[0] + p->linesize[0] * y;
935 s->dsp.add_hfyu_median_prediction(ydst, ydst - fake_ystride, s->temp[0], width, &lefty, &lefttopy);
938 if (y >= height) break;
942 decode_422_bitstream(s, width);
944 ydst = p->data[0] + p->linesize[0] * y;
945 udst = p->data[1] + p->linesize[1] * cy;
946 vdst = p->data[2] + p->linesize[2] * cy;
948 s->dsp.add_hfyu_median_prediction(ydst, ydst - fake_ystride, s->temp[0], width, &lefty, &lefttopy);
949 if (!(s->flags & CODEC_FLAG_GRAY)) {
950 s->dsp.add_hfyu_median_prediction(udst, udst - fake_ustride, s->temp[1], width2, &leftu, &lefttopu);
951 s->dsp.add_hfyu_median_prediction(vdst, vdst - fake_vstride, s->temp[2], width2, &leftv, &lefttopv);
955 draw_slice(s, p, height);
961 int leftr, leftg, leftb, lefta;
962 const int last_line = (height - 1) * p->linesize[0];
964 if (s->bitstream_bpp == 32) {
965 lefta = p->data[0][last_line+A] = get_bits(&s->gb, 8);
966 leftr = p->data[0][last_line+R] = get_bits(&s->gb, 8);
967 leftg = p->data[0][last_line+G] = get_bits(&s->gb, 8);
968 leftb = p->data[0][last_line+B] = get_bits(&s->gb, 8);
970 leftr = p->data[0][last_line+R] = get_bits(&s->gb, 8);
971 leftg = p->data[0][last_line+G] = get_bits(&s->gb, 8);
972 leftb = p->data[0][last_line+B] = get_bits(&s->gb, 8);
973 lefta = p->data[0][last_line+A] = 255;
974 skip_bits(&s->gb, 8);
978 switch (s->predictor) {
981 decode_bgr_bitstream(s, width - 1);
982 s->dsp.add_hfyu_left_prediction_bgr32(p->data[0] + last_line+4, s->temp[0], width - 1, &leftr, &leftg, &leftb, &lefta);
984 for (y = s->height - 2; y >= 0; y--) { //Yes it is stored upside down.
985 decode_bgr_bitstream(s, width);
987 s->dsp.add_hfyu_left_prediction_bgr32(p->data[0] + p->linesize[0]*y, s->temp[0], width, &leftr, &leftg, &leftb, &lefta);
988 if (s->predictor == PLANE) {
989 if (s->bitstream_bpp != 32) lefta = 0;
990 if ((y & s->interlaced) == 0 &&
991 y < s->height - 1 - s->interlaced) {
992 s->dsp.add_bytes(p->data[0] + p->linesize[0] * y,
993 p->data[0] + p->linesize[0] * y +
994 fake_ystride, fake_ystride);
998 // just 1 large slice as this is not possible in reverse order
999 draw_slice(s, p, height);
1002 av_log(avctx, AV_LOG_ERROR,
1003 "prediction type not supported!\n");
1006 av_log(avctx, AV_LOG_ERROR,
1007 "BGR24 output is not implemented yet\n");
1008 return AVERROR_PATCHWELCOME;
1015 return (get_bits_count(&s->gb) + 31) / 32 * 4 + table_size;
1018 static av_cold int decode_end(AVCodecContext *avctx)
1020 HYuvContext *s = avctx->priv_data;
1023 ff_huffyuv_common_end(s);
1024 av_freep(&s->bitstream_buffer);
1026 for (i = 0; i < 8; i++) {
1027 ff_free_vlc(&s->vlc[i]);
1033 #if CONFIG_HUFFYUV_DECODER
1034 AVCodec ff_huffyuv_decoder = {
1036 .long_name = NULL_IF_CONFIG_SMALL("Huffyuv / HuffYUV"),
1037 .type = AVMEDIA_TYPE_VIDEO,
1038 .id = AV_CODEC_ID_HUFFYUV,
1039 .priv_data_size = sizeof(HYuvContext),
1040 .init = decode_init,
1041 .close = decode_end,
1042 .decode = decode_frame,
1043 .capabilities = CODEC_CAP_DR1 | CODEC_CAP_DRAW_HORIZ_BAND |
1044 CODEC_CAP_FRAME_THREADS,
1045 .init_thread_copy = ONLY_IF_THREADS_ENABLED(decode_init_thread_copy),
1049 #if CONFIG_FFVHUFF_DECODER
1050 AVCodec ff_ffvhuff_decoder = {
1052 .long_name = NULL_IF_CONFIG_SMALL("Huffyuv FFmpeg variant"),
1053 .type = AVMEDIA_TYPE_VIDEO,
1054 .id = AV_CODEC_ID_FFVHUFF,
1055 .priv_data_size = sizeof(HYuvContext),
1056 .init = decode_init,
1057 .close = decode_end,
1058 .decode = decode_frame,
1059 .capabilities = CODEC_CAP_DR1 | CODEC_CAP_DRAW_HORIZ_BAND |
1060 CODEC_CAP_FRAME_THREADS,
1061 .init_thread_copy = ONLY_IF_THREADS_ENABLED(decode_init_thread_copy),