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
36 #define classic_shift_luma_table_size 42
37 static const unsigned char classic_shift_luma[classic_shift_luma_table_size + FF_INPUT_BUFFER_PADDING_SIZE] = {
38 34,36,35,69,135,232,9,16,10,24,11,23,12,16,13,10,14,8,15,8,
39 16,8,17,20,16,10,207,206,205,236,11,8,10,21,9,23,8,8,199,70,
44 #define classic_shift_chroma_table_size 59
45 static const unsigned char classic_shift_chroma[classic_shift_chroma_table_size + FF_INPUT_BUFFER_PADDING_SIZE] = {
46 66,36,37,38,39,40,41,75,76,77,110,239,144,81,82,83,84,85,118,183,
47 56,57,88,89,56,89,154,57,58,57,26,141,57,56,58,57,58,57,184,119,
48 214,245,116,83,82,49,80,79,78,77,44,75,41,40,39,38,37,36,34, 0,
52 static const unsigned char classic_add_luma[256] = {
53 3, 9, 5, 12, 10, 35, 32, 29, 27, 50, 48, 45, 44, 41, 39, 37,
54 73, 70, 68, 65, 64, 61, 58, 56, 53, 50, 49, 46, 44, 41, 38, 36,
55 68, 65, 63, 61, 58, 55, 53, 51, 48, 46, 45, 43, 41, 39, 38, 36,
56 35, 33, 32, 30, 29, 27, 26, 25, 48, 47, 46, 44, 43, 41, 40, 39,
57 37, 36, 35, 34, 32, 31, 30, 28, 27, 26, 24, 23, 22, 20, 19, 37,
58 35, 34, 33, 31, 30, 29, 27, 26, 24, 23, 21, 20, 18, 17, 15, 29,
59 27, 26, 24, 22, 21, 19, 17, 16, 14, 26, 25, 23, 21, 19, 18, 16,
60 15, 27, 25, 23, 21, 19, 17, 16, 14, 26, 25, 23, 21, 18, 17, 14,
61 12, 17, 19, 13, 4, 9, 2, 11, 1, 7, 8, 0, 16, 3, 14, 6,
62 12, 10, 5, 15, 18, 11, 10, 13, 15, 16, 19, 20, 22, 24, 27, 15,
63 18, 20, 22, 24, 26, 14, 17, 20, 22, 24, 27, 15, 18, 20, 23, 25,
64 28, 16, 19, 22, 25, 28, 32, 36, 21, 25, 29, 33, 38, 42, 45, 49,
65 28, 31, 34, 37, 40, 42, 44, 47, 49, 50, 52, 54, 56, 57, 59, 60,
66 62, 64, 66, 67, 69, 35, 37, 39, 40, 42, 43, 45, 47, 48, 51, 52,
67 54, 55, 57, 59, 60, 62, 63, 66, 67, 69, 71, 72, 38, 40, 42, 43,
68 46, 47, 49, 51, 26, 28, 30, 31, 33, 34, 18, 19, 11, 13, 7, 8,
71 static const unsigned char classic_add_chroma[256] = {
72 3, 1, 2, 2, 2, 2, 3, 3, 7, 5, 7, 5, 8, 6, 11, 9,
73 7, 13, 11, 10, 9, 8, 7, 5, 9, 7, 6, 4, 7, 5, 8, 7,
74 11, 8, 13, 11, 19, 15, 22, 23, 20, 33, 32, 28, 27, 29, 51, 77,
75 43, 45, 76, 81, 46, 82, 75, 55, 56,144, 58, 80, 60, 74,147, 63,
76 143, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79,
77 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 27, 30, 21, 22,
78 17, 14, 5, 6,100, 54, 47, 50, 51, 53,106,107,108,109,110,111,
79 112,113,114,115, 4,117,118, 92, 94,121,122, 3,124,103, 2, 1,
80 0,129,130,131,120,119,126,125,136,137,138,139,140,141,142,134,
81 135,132,133,104, 64,101, 62, 57,102, 95, 93, 59, 61, 28, 97, 96,
82 52, 49, 48, 29, 32, 25, 24, 46, 23, 98, 45, 44, 43, 20, 42, 41,
83 19, 18, 99, 40, 15, 39, 38, 16, 13, 12, 11, 37, 10, 9, 8, 36,
84 7,128,127,105,123,116, 35, 34, 33,145, 31, 79, 42,146, 78, 26,
85 83, 48, 49, 50, 44, 47, 26, 31, 30, 18, 17, 19, 21, 24, 25, 13,
86 14, 16, 17, 18, 20, 21, 12, 14, 15, 9, 10, 6, 9, 6, 5, 8,
87 6, 12, 8, 10, 7, 9, 6, 4, 6, 2, 2, 3, 3, 3, 3, 2,
90 static int read_len_table(uint8_t *dst, GetBitContext *gb)
94 for (i = 0; i < 256;) {
95 repeat = get_bits(gb, 3);
96 val = get_bits(gb, 5);
98 repeat = get_bits(gb, 8);
99 if (i + repeat > 256 || get_bits_left(gb) < 0) {
100 av_log(NULL, AV_LOG_ERROR, "Error reading huffman table\n");
109 static int generate_joint_tables(HYuvContext *s)
111 uint16_t symbols[1 << VLC_BITS];
112 uint16_t bits[1 << VLC_BITS];
113 uint8_t len[1 << VLC_BITS];
116 if (s->bitstream_bpp < 24) {
118 for (p = 0; p < 3; p++) {
119 for (i = y = 0; y < 256; y++) {
120 int len0 = s->len[0][y];
121 int limit = VLC_BITS - len0;
122 if(limit <= 0 || !len0)
124 for (u = 0; u < 256; u++) {
125 int len1 = s->len[p][u];
126 if (len1 > limit || !len1)
128 av_assert0(i < (1 << VLC_BITS));
129 len[i] = len0 + len1;
130 bits[i] = (s->bits[0][y] << len1) + s->bits[p][u];
131 symbols[i] = (y << 8) + u;
132 if(symbols[i] != 0xffff) // reserved to mean "invalid"
136 ff_free_vlc(&s->vlc[3 + p]);
137 if ((ret = ff_init_vlc_sparse(&s->vlc[3 + p], VLC_BITS, i, len, 1, 1,
138 bits, 2, 2, symbols, 2, 2, 0)) < 0)
142 uint8_t (*map)[4] = (uint8_t(*)[4])s->pix_bgr_map;
143 int i, b, g, r, code;
144 int p0 = s->decorrelate;
145 int p1 = !s->decorrelate;
146 // restrict the range to +/-16 because that's pretty much guaranteed to
147 // cover all the combinations that fit in 11 bits total, and it doesn't
148 // matter if we miss a few rare codes.
149 for (i = 0, g = -16; g < 16; g++) {
150 int len0 = s->len[p0][g & 255];
151 int limit0 = VLC_BITS - len0;
152 if (limit0 < 2 || !len0)
154 for (b = -16; b < 16; b++) {
155 int len1 = s->len[p1][b & 255];
156 int limit1 = limit0 - len1;
157 if (limit1 < 1 || !len1)
159 code = (s->bits[p0][g & 255] << len1) + s->bits[p1][b & 255];
160 for (r = -16; r < 16; r++) {
161 int len2 = s->len[2][r & 255];
162 if (len2 > limit1 || !len2)
164 av_assert0(i < (1 << VLC_BITS));
165 len[i] = len0 + len1 + len2;
166 bits[i] = (code << len2) + s->bits[2][r & 255];
167 if (s->decorrelate) {
180 ff_free_vlc(&s->vlc[3]);
181 if ((ret = init_vlc(&s->vlc[3], VLC_BITS, i, len, 1, 1, bits, 2, 2, 0)) < 0)
187 static int read_huffman_tables(HYuvContext *s, const uint8_t *src, int length)
193 init_get_bits(&gb, src, length * 8);
195 for (i = 0; i < 3; i++) {
196 if (read_len_table(s->len[i], &gb) < 0)
198 if (ff_huffyuv_generate_bits_table(s->bits[i], s->len[i]) < 0) {
201 ff_free_vlc(&s->vlc[i]);
202 if ((ret = init_vlc(&s->vlc[i], VLC_BITS, 256, s->len[i], 1, 1,
203 s->bits[i], 4, 4, 0)) < 0)
207 if ((ret = generate_joint_tables(s)) < 0)
210 return (get_bits_count(&gb) + 7) / 8;
213 static int read_old_huffman_tables(HYuvContext *s)
219 init_get_bits(&gb, classic_shift_luma,
220 classic_shift_luma_table_size * 8);
221 if (read_len_table(s->len[0], &gb) < 0)
224 init_get_bits(&gb, classic_shift_chroma,
225 classic_shift_chroma_table_size * 8);
226 if (read_len_table(s->len[1], &gb) < 0)
229 for(i=0; i<256; i++) s->bits[0][i] = classic_add_luma [i];
230 for(i=0; i<256; i++) s->bits[1][i] = classic_add_chroma[i];
232 if (s->bitstream_bpp >= 24) {
233 memcpy(s->bits[1], s->bits[0], 256 * sizeof(uint32_t));
234 memcpy(s->len[1] , s->len [0], 256 * sizeof(uint8_t));
236 memcpy(s->bits[2], s->bits[1], 256 * sizeof(uint32_t));
237 memcpy(s->len[2] , s->len [1], 256 * sizeof(uint8_t));
239 for (i = 0; i < 3; i++) {
240 ff_free_vlc(&s->vlc[i]);
241 if ((ret = init_vlc(&s->vlc[i], VLC_BITS, 256, s->len[i], 1, 1,
242 s->bits[i], 4, 4, 0)) < 0)
246 if ((ret = generate_joint_tables(s)) < 0)
252 static av_cold int decode_init(AVCodecContext *avctx)
254 HYuvContext *s = avctx->priv_data;
256 ff_huffyuv_common_init(avctx);
257 memset(s->vlc, 0, 3 * sizeof(VLC));
259 avcodec_get_frame_defaults(&s->picture);
260 s->interlaced = s->height > 288;
264 if (avctx->extradata_size) {
265 if ((avctx->bits_per_coded_sample & 7) &&
266 avctx->bits_per_coded_sample != 12)
267 s->version = 1; // do such files exist at all?
273 if (s->version == 2) {
274 int method, interlace;
276 if (avctx->extradata_size < 4)
279 method = ((uint8_t*)avctx->extradata)[0];
280 s->decorrelate = method & 64 ? 1 : 0;
281 s->predictor = method & 63;
282 s->bitstream_bpp = ((uint8_t*)avctx->extradata)[1];
283 if (s->bitstream_bpp == 0)
284 s->bitstream_bpp = avctx->bits_per_coded_sample & ~7;
285 interlace = (((uint8_t*)avctx->extradata)[2] & 0x30) >> 4;
286 s->interlaced = (interlace == 1) ? 1 : (interlace == 2) ? 0 : s->interlaced;
287 s->context = ((uint8_t*)avctx->extradata)[2] & 0x40 ? 1 : 0;
289 if ( read_huffman_tables(s, ((uint8_t*)avctx->extradata) + 4,
290 avctx->extradata_size - 4) < 0)
291 return AVERROR_INVALIDDATA;
293 switch (avctx->bits_per_coded_sample & 7) {
303 s->predictor = PLANE;
304 s->decorrelate = avctx->bits_per_coded_sample >= 24;
307 s->predictor = MEDIAN;
311 s->predictor = LEFT; //OLD
315 s->bitstream_bpp = avctx->bits_per_coded_sample & ~7;
318 if (read_old_huffman_tables(s) < 0)
319 return AVERROR_INVALIDDATA;
322 switch (s->bitstream_bpp) {
324 avctx->pix_fmt = AV_PIX_FMT_YUV420P;
328 avctx->pix_fmt = AV_PIX_FMT_YUYV422;
330 avctx->pix_fmt = AV_PIX_FMT_YUV422P;
336 avctx->pix_fmt = AV_PIX_FMT_RGB32;
338 avctx->pix_fmt = AV_PIX_FMT_BGR24;
342 return AVERROR_INVALIDDATA;
345 if ((avctx->pix_fmt == AV_PIX_FMT_YUV422P || avctx->pix_fmt == AV_PIX_FMT_YUV420P) && avctx->width & 1) {
346 av_log(avctx, AV_LOG_ERROR, "width must be even for this colorspace\n");
347 return AVERROR_INVALIDDATA;
349 if (s->predictor == MEDIAN && avctx->pix_fmt == AV_PIX_FMT_YUV422P && avctx->width%4) {
350 av_log(avctx, AV_LOG_ERROR, "width must be a multiple of 4 this colorspace and predictor\n");
351 return AVERROR_INVALIDDATA;
353 if (ff_huffyuv_alloc_temp(s)) {
354 ff_huffyuv_common_end(s);
355 return AVERROR(ENOMEM);
361 static av_cold int decode_init_thread_copy(AVCodecContext *avctx)
363 HYuvContext *s = avctx->priv_data;
366 if (ff_huffyuv_alloc_temp(s)) {
367 ff_huffyuv_common_end(s);
368 return AVERROR(ENOMEM);
371 for (i = 0; i < 6; i++)
372 s->vlc[i].table = NULL;
374 if (s->version == 2) {
375 if (read_huffman_tables(s, ((uint8_t*)avctx->extradata) + 4,
376 avctx->extradata_size) < 0)
377 return AVERROR_INVALIDDATA;
379 if (read_old_huffman_tables(s) < 0)
380 return AVERROR_INVALIDDATA;
386 /* TODO instead of restarting the read when the code isn't in the first level
387 * of the joint table, jump into the 2nd level of the individual table. */
388 #define READ_2PIX(dst0, dst1, plane1){\
389 uint16_t code = get_vlc2(&s->gb, s->vlc[3+plane1].table, VLC_BITS, 1);\
394 dst0 = get_vlc2(&s->gb, s->vlc[0].table, VLC_BITS, 3);\
395 dst1 = get_vlc2(&s->gb, s->vlc[plane1].table, VLC_BITS, 3);\
399 static void decode_422_bitstream(HYuvContext *s, int count)
405 if (count >= (get_bits_left(&s->gb)) / (31 * 4)) {
406 for (i = 0; i < count && get_bits_left(&s->gb) > 0; i++) {
407 READ_2PIX(s->temp[0][2 * i ], s->temp[1][i], 1);
408 READ_2PIX(s->temp[0][2 * i + 1], s->temp[2][i], 2);
411 for (i = 0; i < count; i++) {
412 READ_2PIX(s->temp[0][2 * i ], s->temp[1][i], 1);
413 READ_2PIX(s->temp[0][2 * i + 1], s->temp[2][i], 2);
418 static void decode_gray_bitstream(HYuvContext *s, int count)
424 if (count >= (get_bits_left(&s->gb)) / (31 * 2)) {
425 for (i = 0; i < count && get_bits_left(&s->gb) > 0; i++) {
426 READ_2PIX(s->temp[0][2 * i], s->temp[0][2 * i + 1], 0);
429 for(i=0; i<count; i++){
430 READ_2PIX(s->temp[0][2 * i], s->temp[0][2 * i + 1], 0);
435 static av_always_inline void decode_bgr_1(HYuvContext *s, int count,
436 int decorrelate, int alpha)
439 for (i = 0; i < count; i++) {
440 int code = get_vlc2(&s->gb, s->vlc[3].table, VLC_BITS, 1);
442 *(uint32_t*)&s->temp[0][4 * i] = s->pix_bgr_map[code];
443 } else if(decorrelate) {
444 s->temp[0][4 * i + G] = get_vlc2(&s->gb, s->vlc[1].table, VLC_BITS, 3);
445 s->temp[0][4 * i + B] = get_vlc2(&s->gb, s->vlc[0].table, VLC_BITS, 3) +
446 s->temp[0][4 * i + G];
447 s->temp[0][4 * i + R] = get_vlc2(&s->gb, s->vlc[2].table, VLC_BITS, 3) +
448 s->temp[0][4 * i + G];
450 s->temp[0][4 * i + B] = get_vlc2(&s->gb, s->vlc[0].table, VLC_BITS, 3);
451 s->temp[0][4 * i + G] = get_vlc2(&s->gb, s->vlc[1].table, VLC_BITS, 3);
452 s->temp[0][4 * i + R] = get_vlc2(&s->gb, s->vlc[2].table, VLC_BITS, 3);
455 s->temp[0][4 * i + A] = get_vlc2(&s->gb, s->vlc[2].table, VLC_BITS, 3);
459 static void decode_bgr_bitstream(HYuvContext *s, int count)
461 if (s->decorrelate) {
462 if (s->bitstream_bpp==24)
463 decode_bgr_1(s, count, 1, 0);
465 decode_bgr_1(s, count, 1, 1);
467 if (s->bitstream_bpp==24)
468 decode_bgr_1(s, count, 0, 0);
470 decode_bgr_1(s, count, 0, 1);
474 static void draw_slice(HYuvContext *s, AVFrame *frame, int y)
477 int offset[AV_NUM_DATA_POINTERS];
479 if (s->avctx->draw_horiz_band==NULL)
482 h = y - s->last_slice_end;
485 if (s->bitstream_bpp == 12) {
491 offset[0] = frame->linesize[0] * y;
492 offset[1] = frame->linesize[1] * cy;
493 offset[2] = frame->linesize[2] * cy;
494 for (i = 3; i < AV_NUM_DATA_POINTERS; i++)
498 s->avctx->draw_horiz_band(s->avctx, frame, offset, y, 3, h);
500 s->last_slice_end = y + h;
503 static int decode_frame(AVCodecContext *avctx, void *data, int *got_frame,
506 const uint8_t *buf = avpkt->data;
507 int buf_size = avpkt->size;
508 HYuvContext *s = avctx->priv_data;
509 const int width = s->width;
510 const int width2 = s->width>>1;
511 const int height = s->height;
512 int fake_ystride, fake_ustride, fake_vstride;
513 ThreadFrame frame = { .f = data };
514 AVFrame * const p = data;
515 int table_size = 0, ret;
517 av_fast_padded_malloc(&s->bitstream_buffer,
518 &s->bitstream_buffer_size,
520 if (!s->bitstream_buffer)
521 return AVERROR(ENOMEM);
523 s->dsp.bswap_buf((uint32_t*)s->bitstream_buffer,
524 (const uint32_t*)buf, buf_size / 4);
526 if ((ret = ff_thread_get_buffer(avctx, &frame, 0)) < 0)
530 table_size = read_huffman_tables(s, s->bitstream_buffer, buf_size);
532 return AVERROR_INVALIDDATA;
535 if ((unsigned)(buf_size-table_size) >= INT_MAX / 8)
536 return AVERROR_INVALIDDATA;
538 init_get_bits(&s->gb, s->bitstream_buffer+table_size,
539 (buf_size-table_size) * 8);
541 fake_ystride = s->interlaced ? p->linesize[0] * 2 : p->linesize[0];
542 fake_ustride = s->interlaced ? p->linesize[1] * 2 : p->linesize[1];
543 fake_vstride = s->interlaced ? p->linesize[2] * 2 : p->linesize[2];
545 s->last_slice_end = 0;
547 if (s->bitstream_bpp < 24) {
549 int lefty, leftu, leftv;
550 int lefttopy, lefttopu, lefttopv;
553 p->data[0][3] = get_bits(&s->gb, 8);
554 p->data[0][2] = get_bits(&s->gb, 8);
555 p->data[0][1] = get_bits(&s->gb, 8);
556 p->data[0][0] = get_bits(&s->gb, 8);
558 av_log(avctx, AV_LOG_ERROR,
559 "YUY2 output is not implemented yet\n");
560 return AVERROR_PATCHWELCOME;
563 leftv = p->data[2][0] = get_bits(&s->gb, 8);
564 lefty = p->data[0][1] = get_bits(&s->gb, 8);
565 leftu = p->data[1][0] = get_bits(&s->gb, 8);
566 p->data[0][0] = get_bits(&s->gb, 8);
568 switch (s->predictor) {
571 decode_422_bitstream(s, width-2);
572 lefty = s->dsp.add_hfyu_left_prediction(p->data[0] + 2, s->temp[0], width-2, lefty);
573 if (!(s->flags&CODEC_FLAG_GRAY)) {
574 leftu = s->dsp.add_hfyu_left_prediction(p->data[1] + 1, s->temp[1], width2 - 1, leftu);
575 leftv = s->dsp.add_hfyu_left_prediction(p->data[2] + 1, s->temp[2], width2 - 1, leftv);
578 for (cy = y = 1; y < s->height; y++, cy++) {
579 uint8_t *ydst, *udst, *vdst;
581 if (s->bitstream_bpp == 12) {
582 decode_gray_bitstream(s, width);
584 ydst = p->data[0] + p->linesize[0] * y;
586 lefty = s->dsp.add_hfyu_left_prediction(ydst, s->temp[0], width, lefty);
587 if (s->predictor == PLANE) {
588 if (y > s->interlaced)
589 s->dsp.add_bytes(ydst, ydst - fake_ystride, width);
592 if (y >= s->height) break;
597 ydst = p->data[0] + p->linesize[0]*y;
598 udst = p->data[1] + p->linesize[1]*cy;
599 vdst = p->data[2] + p->linesize[2]*cy;
601 decode_422_bitstream(s, width);
602 lefty = s->dsp.add_hfyu_left_prediction(ydst, s->temp[0], width, lefty);
603 if (!(s->flags & CODEC_FLAG_GRAY)) {
604 leftu= s->dsp.add_hfyu_left_prediction(udst, s->temp[1], width2, leftu);
605 leftv= s->dsp.add_hfyu_left_prediction(vdst, s->temp[2], width2, leftv);
607 if (s->predictor == PLANE) {
608 if (cy > s->interlaced) {
609 s->dsp.add_bytes(ydst, ydst - fake_ystride, width);
610 if (!(s->flags & CODEC_FLAG_GRAY)) {
611 s->dsp.add_bytes(udst, udst - fake_ustride, width2);
612 s->dsp.add_bytes(vdst, vdst - fake_vstride, width2);
617 draw_slice(s, p, height);
621 /* first line except first 2 pixels is left predicted */
622 decode_422_bitstream(s, width - 2);
623 lefty= s->dsp.add_hfyu_left_prediction(p->data[0] + 2, s->temp[0], width - 2, lefty);
624 if (!(s->flags & CODEC_FLAG_GRAY)) {
625 leftu = s->dsp.add_hfyu_left_prediction(p->data[1] + 1, s->temp[1], width2 - 1, leftu);
626 leftv = s->dsp.add_hfyu_left_prediction(p->data[2] + 1, s->temp[2], width2 - 1, leftv);
631 /* second line is left predicted for interlaced case */
633 decode_422_bitstream(s, width);
634 lefty = s->dsp.add_hfyu_left_prediction(p->data[0] + p->linesize[0], s->temp[0], width, lefty);
635 if (!(s->flags & CODEC_FLAG_GRAY)) {
636 leftu = s->dsp.add_hfyu_left_prediction(p->data[1] + p->linesize[2], s->temp[1], width2, leftu);
637 leftv = s->dsp.add_hfyu_left_prediction(p->data[2] + p->linesize[1], s->temp[2], width2, leftv);
642 /* next 4 pixels are left predicted too */
643 decode_422_bitstream(s, 4);
644 lefty = s->dsp.add_hfyu_left_prediction(p->data[0] + fake_ystride, s->temp[0], 4, lefty);
645 if (!(s->flags&CODEC_FLAG_GRAY)) {
646 leftu = s->dsp.add_hfyu_left_prediction(p->data[1] + fake_ustride, s->temp[1], 2, leftu);
647 leftv = s->dsp.add_hfyu_left_prediction(p->data[2] + fake_vstride, s->temp[2], 2, leftv);
650 /* next line except the first 4 pixels is median predicted */
651 lefttopy = p->data[0][3];
652 decode_422_bitstream(s, width - 4);
653 s->dsp.add_hfyu_median_prediction(p->data[0] + fake_ystride+4, p->data[0]+4, s->temp[0], width-4, &lefty, &lefttopy);
654 if (!(s->flags&CODEC_FLAG_GRAY)) {
655 lefttopu = p->data[1][1];
656 lefttopv = p->data[2][1];
657 s->dsp.add_hfyu_median_prediction(p->data[1] + fake_ustride+2, p->data[1] + 2, s->temp[1], width2 - 2, &leftu, &lefttopu);
658 s->dsp.add_hfyu_median_prediction(p->data[2] + fake_vstride+2, p->data[2] + 2, s->temp[2], width2 - 2, &leftv, &lefttopv);
662 for (; y<height; y++, cy++) {
663 uint8_t *ydst, *udst, *vdst;
665 if (s->bitstream_bpp == 12) {
667 decode_gray_bitstream(s, width);
668 ydst = p->data[0] + p->linesize[0] * y;
669 s->dsp.add_hfyu_median_prediction(ydst, ydst - fake_ystride, s->temp[0], width, &lefty, &lefttopy);
672 if (y >= height) break;
676 decode_422_bitstream(s, width);
678 ydst = p->data[0] + p->linesize[0] * y;
679 udst = p->data[1] + p->linesize[1] * cy;
680 vdst = p->data[2] + p->linesize[2] * cy;
682 s->dsp.add_hfyu_median_prediction(ydst, ydst - fake_ystride, s->temp[0], width, &lefty, &lefttopy);
683 if (!(s->flags & CODEC_FLAG_GRAY)) {
684 s->dsp.add_hfyu_median_prediction(udst, udst - fake_ustride, s->temp[1], width2, &leftu, &lefttopu);
685 s->dsp.add_hfyu_median_prediction(vdst, vdst - fake_vstride, s->temp[2], width2, &leftv, &lefttopv);
689 draw_slice(s, p, height);
695 int leftr, leftg, leftb, lefta;
696 const int last_line = (height - 1) * p->linesize[0];
698 if (s->bitstream_bpp == 32) {
699 lefta = p->data[0][last_line+A] = get_bits(&s->gb, 8);
700 leftr = p->data[0][last_line+R] = get_bits(&s->gb, 8);
701 leftg = p->data[0][last_line+G] = get_bits(&s->gb, 8);
702 leftb = p->data[0][last_line+B] = get_bits(&s->gb, 8);
704 leftr = p->data[0][last_line+R] = get_bits(&s->gb, 8);
705 leftg = p->data[0][last_line+G] = get_bits(&s->gb, 8);
706 leftb = p->data[0][last_line+B] = get_bits(&s->gb, 8);
707 lefta = p->data[0][last_line+A] = 255;
708 skip_bits(&s->gb, 8);
712 switch (s->predictor) {
715 decode_bgr_bitstream(s, width - 1);
716 s->dsp.add_hfyu_left_prediction_bgr32(p->data[0] + last_line+4, s->temp[0], width - 1, &leftr, &leftg, &leftb, &lefta);
718 for (y = s->height - 2; y >= 0; y--) { //Yes it is stored upside down.
719 decode_bgr_bitstream(s, width);
721 s->dsp.add_hfyu_left_prediction_bgr32(p->data[0] + p->linesize[0]*y, s->temp[0], width, &leftr, &leftg, &leftb, &lefta);
722 if (s->predictor == PLANE) {
723 if (s->bitstream_bpp != 32) lefta = 0;
724 if ((y & s->interlaced) == 0 &&
725 y < s->height - 1 - s->interlaced) {
726 s->dsp.add_bytes(p->data[0] + p->linesize[0] * y,
727 p->data[0] + p->linesize[0] * y +
728 fake_ystride, fake_ystride);
732 // just 1 large slice as this is not possible in reverse order
733 draw_slice(s, p, height);
736 av_log(avctx, AV_LOG_ERROR,
737 "prediction type not supported!\n");
740 av_log(avctx, AV_LOG_ERROR,
741 "BGR24 output is not implemented yet\n");
742 return AVERROR_PATCHWELCOME;
749 return (get_bits_count(&s->gb) + 31) / 32 * 4 + table_size;
752 static av_cold int decode_end(AVCodecContext *avctx)
754 HYuvContext *s = avctx->priv_data;
757 ff_huffyuv_common_end(s);
758 av_freep(&s->bitstream_buffer);
760 for (i = 0; i < 6; i++) {
761 ff_free_vlc(&s->vlc[i]);
767 #if CONFIG_HUFFYUV_DECODER
768 AVCodec ff_huffyuv_decoder = {
770 .type = AVMEDIA_TYPE_VIDEO,
771 .id = AV_CODEC_ID_HUFFYUV,
772 .priv_data_size = sizeof(HYuvContext),
775 .decode = decode_frame,
776 .capabilities = CODEC_CAP_DR1 | CODEC_CAP_DRAW_HORIZ_BAND |
777 CODEC_CAP_FRAME_THREADS,
778 .init_thread_copy = ONLY_IF_THREADS_ENABLED(decode_init_thread_copy),
779 .long_name = NULL_IF_CONFIG_SMALL("Huffyuv / HuffYUV"),
783 #if CONFIG_FFVHUFF_DECODER
784 AVCodec ff_ffvhuff_decoder = {
786 .type = AVMEDIA_TYPE_VIDEO,
787 .id = AV_CODEC_ID_FFVHUFF,
788 .priv_data_size = sizeof(HYuvContext),
791 .decode = decode_frame,
792 .capabilities = CODEC_CAP_DR1 | CODEC_CAP_DRAW_HORIZ_BAND |
793 CODEC_CAP_FRAME_THREADS,
794 .init_thread_copy = ONLY_IF_THREADS_ENABLED(decode_init_thread_copy),
795 .long_name = NULL_IF_CONFIG_SMALL("Huffyuv FFmpeg variant"),