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
37 #define classic_shift_luma_table_size 42
38 static const unsigned char classic_shift_luma[classic_shift_luma_table_size + FF_INPUT_BUFFER_PADDING_SIZE] = {
39 34,36,35,69,135,232,9,16,10,24,11,23,12,16,13,10,14,8,15,8,
40 16,8,17,20,16,10,207,206,205,236,11,8,10,21,9,23,8,8,199,70,
45 #define classic_shift_chroma_table_size 59
46 static const unsigned char classic_shift_chroma[classic_shift_chroma_table_size + FF_INPUT_BUFFER_PADDING_SIZE] = {
47 66,36,37,38,39,40,41,75,76,77,110,239,144,81,82,83,84,85,118,183,
48 56,57,88,89,56,89,154,57,58,57,26,141,57,56,58,57,58,57,184,119,
49 214,245,116,83,82,49,80,79,78,77,44,75,41,40,39,38,37,36,34, 0,
53 static const unsigned char classic_add_luma[256] = {
54 3, 9, 5, 12, 10, 35, 32, 29, 27, 50, 48, 45, 44, 41, 39, 37,
55 73, 70, 68, 65, 64, 61, 58, 56, 53, 50, 49, 46, 44, 41, 38, 36,
56 68, 65, 63, 61, 58, 55, 53, 51, 48, 46, 45, 43, 41, 39, 38, 36,
57 35, 33, 32, 30, 29, 27, 26, 25, 48, 47, 46, 44, 43, 41, 40, 39,
58 37, 36, 35, 34, 32, 31, 30, 28, 27, 26, 24, 23, 22, 20, 19, 37,
59 35, 34, 33, 31, 30, 29, 27, 26, 24, 23, 21, 20, 18, 17, 15, 29,
60 27, 26, 24, 22, 21, 19, 17, 16, 14, 26, 25, 23, 21, 19, 18, 16,
61 15, 27, 25, 23, 21, 19, 17, 16, 14, 26, 25, 23, 21, 18, 17, 14,
62 12, 17, 19, 13, 4, 9, 2, 11, 1, 7, 8, 0, 16, 3, 14, 6,
63 12, 10, 5, 15, 18, 11, 10, 13, 15, 16, 19, 20, 22, 24, 27, 15,
64 18, 20, 22, 24, 26, 14, 17, 20, 22, 24, 27, 15, 18, 20, 23, 25,
65 28, 16, 19, 22, 25, 28, 32, 36, 21, 25, 29, 33, 38, 42, 45, 49,
66 28, 31, 34, 37, 40, 42, 44, 47, 49, 50, 52, 54, 56, 57, 59, 60,
67 62, 64, 66, 67, 69, 35, 37, 39, 40, 42, 43, 45, 47, 48, 51, 52,
68 54, 55, 57, 59, 60, 62, 63, 66, 67, 69, 71, 72, 38, 40, 42, 43,
69 46, 47, 49, 51, 26, 28, 30, 31, 33, 34, 18, 19, 11, 13, 7, 8,
72 static const unsigned char classic_add_chroma[256] = {
73 3, 1, 2, 2, 2, 2, 3, 3, 7, 5, 7, 5, 8, 6, 11, 9,
74 7, 13, 11, 10, 9, 8, 7, 5, 9, 7, 6, 4, 7, 5, 8, 7,
75 11, 8, 13, 11, 19, 15, 22, 23, 20, 33, 32, 28, 27, 29, 51, 77,
76 43, 45, 76, 81, 46, 82, 75, 55, 56,144, 58, 80, 60, 74,147, 63,
77 143, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79,
78 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 27, 30, 21, 22,
79 17, 14, 5, 6,100, 54, 47, 50, 51, 53,106,107,108,109,110,111,
80 112,113,114,115, 4,117,118, 92, 94,121,122, 3,124,103, 2, 1,
81 0,129,130,131,120,119,126,125,136,137,138,139,140,141,142,134,
82 135,132,133,104, 64,101, 62, 57,102, 95, 93, 59, 61, 28, 97, 96,
83 52, 49, 48, 29, 32, 25, 24, 46, 23, 98, 45, 44, 43, 20, 42, 41,
84 19, 18, 99, 40, 15, 39, 38, 16, 13, 12, 11, 37, 10, 9, 8, 36,
85 7,128,127,105,123,116, 35, 34, 33,145, 31, 79, 42,146, 78, 26,
86 83, 48, 49, 50, 44, 47, 26, 31, 30, 18, 17, 19, 21, 24, 25, 13,
87 14, 16, 17, 18, 20, 21, 12, 14, 15, 9, 10, 6, 9, 6, 5, 8,
88 6, 12, 8, 10, 7, 9, 6, 4, 6, 2, 2, 3, 3, 3, 3, 2,
91 static int read_len_table(uint8_t *dst, GetBitContext *gb)
95 for (i = 0; i < 256;) {
96 repeat = get_bits(gb, 3);
97 val = get_bits(gb, 5);
99 repeat = get_bits(gb, 8);
100 if (i + repeat > 256 || get_bits_left(gb) < 0) {
101 av_log(NULL, AV_LOG_ERROR, "Error reading huffman table\n");
110 static int generate_joint_tables(HYuvContext *s)
112 uint16_t symbols[1 << VLC_BITS];
113 uint16_t bits[1 << VLC_BITS];
114 uint8_t len[1 << VLC_BITS];
117 if (s->bitstream_bpp < 24) {
119 for (p = 0; p < 3; p++) {
120 for (i = y = 0; y < 256; y++) {
121 int len0 = s->len[0][y];
122 int limit = VLC_BITS - len0;
123 if(limit <= 0 || !len0)
125 for (u = 0; u < 256; u++) {
126 int len1 = s->len[p][u];
127 if (len1 > limit || !len1)
129 av_assert0(i < (1 << VLC_BITS));
130 len[i] = len0 + len1;
131 bits[i] = (s->bits[0][y] << len1) + s->bits[p][u];
132 symbols[i] = (y << 8) + u;
133 if(symbols[i] != 0xffff) // reserved to mean "invalid"
137 ff_free_vlc(&s->vlc[3 + p]);
138 if ((ret = ff_init_vlc_sparse(&s->vlc[3 + p], VLC_BITS, i, len, 1, 1,
139 bits, 2, 2, symbols, 2, 2, 0)) < 0)
143 uint8_t (*map)[4] = (uint8_t(*)[4])s->pix_bgr_map;
144 int i, b, g, r, code;
145 int p0 = s->decorrelate;
146 int p1 = !s->decorrelate;
147 // restrict the range to +/-16 because that's pretty much guaranteed to
148 // cover all the combinations that fit in 11 bits total, and it doesn't
149 // matter if we miss a few rare codes.
150 for (i = 0, g = -16; g < 16; g++) {
151 int len0 = s->len[p0][g & 255];
152 int limit0 = VLC_BITS - len0;
153 if (limit0 < 2 || !len0)
155 for (b = -16; b < 16; b++) {
156 int len1 = s->len[p1][b & 255];
157 int limit1 = limit0 - len1;
158 if (limit1 < 1 || !len1)
160 code = (s->bits[p0][g & 255] << len1) + s->bits[p1][b & 255];
161 for (r = -16; r < 16; r++) {
162 int len2 = s->len[2][r & 255];
163 if (len2 > limit1 || !len2)
165 av_assert0(i < (1 << VLC_BITS));
166 len[i] = len0 + len1 + len2;
167 bits[i] = (code << len2) + s->bits[2][r & 255];
168 if (s->decorrelate) {
181 ff_free_vlc(&s->vlc[3]);
182 if ((ret = init_vlc(&s->vlc[3], VLC_BITS, i, len, 1, 1, bits, 2, 2, 0)) < 0)
188 static int read_huffman_tables(HYuvContext *s, const uint8_t *src, int length)
194 init_get_bits(&gb, src, length * 8);
196 for (i = 0; i < 3; i++) {
197 if (read_len_table(s->len[i], &gb) < 0)
199 if (ff_huffyuv_generate_bits_table(s->bits[i], s->len[i]) < 0) {
202 ff_free_vlc(&s->vlc[i]);
203 if ((ret = init_vlc(&s->vlc[i], VLC_BITS, 256, s->len[i], 1, 1,
204 s->bits[i], 4, 4, 0)) < 0)
208 if ((ret = generate_joint_tables(s)) < 0)
211 return (get_bits_count(&gb) + 7) / 8;
214 static int read_old_huffman_tables(HYuvContext *s)
220 init_get_bits(&gb, classic_shift_luma,
221 classic_shift_luma_table_size * 8);
222 if (read_len_table(s->len[0], &gb) < 0)
225 init_get_bits(&gb, classic_shift_chroma,
226 classic_shift_chroma_table_size * 8);
227 if (read_len_table(s->len[1], &gb) < 0)
230 for(i=0; i<256; i++) s->bits[0][i] = classic_add_luma [i];
231 for(i=0; i<256; i++) s->bits[1][i] = classic_add_chroma[i];
233 if (s->bitstream_bpp >= 24) {
234 memcpy(s->bits[1], s->bits[0], 256 * sizeof(uint32_t));
235 memcpy(s->len[1] , s->len [0], 256 * sizeof(uint8_t));
237 memcpy(s->bits[2], s->bits[1], 256 * sizeof(uint32_t));
238 memcpy(s->len[2] , s->len [1], 256 * sizeof(uint8_t));
240 for (i = 0; i < 3; i++) {
241 ff_free_vlc(&s->vlc[i]);
242 if ((ret = init_vlc(&s->vlc[i], VLC_BITS, 256, s->len[i], 1, 1,
243 s->bits[i], 4, 4, 0)) < 0)
247 if ((ret = generate_joint_tables(s)) < 0)
253 static av_cold int decode_init(AVCodecContext *avctx)
255 HYuvContext *s = avctx->priv_data;
257 ff_huffyuv_common_init(avctx);
258 memset(s->vlc, 0, 3 * sizeof(VLC));
260 avctx->coded_frame = &s->picture;
261 avcodec_get_frame_defaults(&s->picture);
262 s->interlaced = s->height > 288;
266 if (avctx->extradata_size) {
267 if ((avctx->bits_per_coded_sample & 7) &&
268 avctx->bits_per_coded_sample != 12)
269 s->version = 1; // do such files exist at all?
275 if (s->version == 2) {
276 int method, interlace;
278 if (avctx->extradata_size < 4)
281 method = ((uint8_t*)avctx->extradata)[0];
282 s->decorrelate = method & 64 ? 1 : 0;
283 s->predictor = method & 63;
284 s->bitstream_bpp = ((uint8_t*)avctx->extradata)[1];
285 if (s->bitstream_bpp == 0)
286 s->bitstream_bpp = avctx->bits_per_coded_sample & ~7;
287 interlace = (((uint8_t*)avctx->extradata)[2] & 0x30) >> 4;
288 s->interlaced = (interlace == 1) ? 1 : (interlace == 2) ? 0 : s->interlaced;
289 s->context = ((uint8_t*)avctx->extradata)[2] & 0x40 ? 1 : 0;
291 if ( read_huffman_tables(s, ((uint8_t*)avctx->extradata) + 4,
292 avctx->extradata_size - 4) < 0)
293 return AVERROR_INVALIDDATA;
295 switch (avctx->bits_per_coded_sample & 7) {
305 s->predictor = PLANE;
306 s->decorrelate = avctx->bits_per_coded_sample >= 24;
309 s->predictor = MEDIAN;
313 s->predictor = LEFT; //OLD
317 s->bitstream_bpp = avctx->bits_per_coded_sample & ~7;
320 if (read_old_huffman_tables(s) < 0)
321 return AVERROR_INVALIDDATA;
324 switch (s->bitstream_bpp) {
326 avctx->pix_fmt = AV_PIX_FMT_YUV420P;
330 avctx->pix_fmt = AV_PIX_FMT_YUYV422;
332 avctx->pix_fmt = AV_PIX_FMT_YUV422P;
338 avctx->pix_fmt = AV_PIX_FMT_RGB32;
340 avctx->pix_fmt = AV_PIX_FMT_BGR24;
344 return AVERROR_INVALIDDATA;
347 if ((avctx->pix_fmt == AV_PIX_FMT_YUV422P || avctx->pix_fmt == AV_PIX_FMT_YUV420P) && avctx->width & 1) {
348 av_log(avctx, AV_LOG_ERROR, "width must be even for this colorspace\n");
349 return AVERROR_INVALIDDATA;
351 if (s->predictor == MEDIAN && avctx->pix_fmt == AV_PIX_FMT_YUV422P && avctx->width%4) {
352 av_log(avctx, AV_LOG_ERROR, "width must be a multiple of 4 this colorspace and predictor\n");
353 return AVERROR_INVALIDDATA;
355 if (ff_huffyuv_alloc_temp(s)) {
356 ff_huffyuv_common_end(s);
357 return AVERROR(ENOMEM);
363 static av_cold int decode_init_thread_copy(AVCodecContext *avctx)
365 HYuvContext *s = avctx->priv_data;
368 avctx->coded_frame= &s->picture;
369 if (ff_huffyuv_alloc_temp(s)) {
370 ff_huffyuv_common_end(s);
371 return AVERROR(ENOMEM);
374 for (i = 0; i < 6; i++)
375 s->vlc[i].table = NULL;
377 if (s->version == 2) {
378 if (read_huffman_tables(s, ((uint8_t*)avctx->extradata) + 4,
379 avctx->extradata_size) < 0)
380 return AVERROR_INVALIDDATA;
382 if (read_old_huffman_tables(s) < 0)
383 return AVERROR_INVALIDDATA;
389 /* TODO instead of restarting the read when the code isn't in the first level
390 * of the joint table, jump into the 2nd level of the individual table. */
391 #define READ_2PIX(dst0, dst1, plane1){\
392 uint16_t code = get_vlc2(&s->gb, s->vlc[3+plane1].table, VLC_BITS, 1);\
397 dst0 = get_vlc2(&s->gb, s->vlc[0].table, VLC_BITS, 3);\
398 dst1 = get_vlc2(&s->gb, s->vlc[plane1].table, VLC_BITS, 3);\
402 static void decode_422_bitstream(HYuvContext *s, int count)
408 if (count >= (get_bits_left(&s->gb)) / (31 * 4)) {
409 for (i = 0; i < count && get_bits_left(&s->gb) > 0; i++) {
410 READ_2PIX(s->temp[0][2 * i ], s->temp[1][i], 1);
411 READ_2PIX(s->temp[0][2 * i + 1], s->temp[2][i], 2);
414 for (i = 0; i < count; i++) {
415 READ_2PIX(s->temp[0][2 * i ], s->temp[1][i], 1);
416 READ_2PIX(s->temp[0][2 * i + 1], s->temp[2][i], 2);
421 static void decode_gray_bitstream(HYuvContext *s, int count)
427 if (count >= (get_bits_left(&s->gb)) / (31 * 2)) {
428 for (i = 0; i < count && get_bits_left(&s->gb) > 0; i++) {
429 READ_2PIX(s->temp[0][2 * i], s->temp[0][2 * i + 1], 0);
432 for(i=0; i<count; i++){
433 READ_2PIX(s->temp[0][2 * i], s->temp[0][2 * i + 1], 0);
438 static av_always_inline void decode_bgr_1(HYuvContext *s, int count,
439 int decorrelate, int alpha)
442 for (i = 0; i < count; i++) {
443 int code = get_vlc2(&s->gb, s->vlc[3].table, VLC_BITS, 1);
445 *(uint32_t*)&s->temp[0][4 * i] = s->pix_bgr_map[code];
446 } else if(decorrelate) {
447 s->temp[0][4 * i + G] = get_vlc2(&s->gb, s->vlc[1].table, VLC_BITS, 3);
448 s->temp[0][4 * i + B] = get_vlc2(&s->gb, s->vlc[0].table, VLC_BITS, 3) +
449 s->temp[0][4 * i + G];
450 s->temp[0][4 * i + R] = get_vlc2(&s->gb, s->vlc[2].table, VLC_BITS, 3) +
451 s->temp[0][4 * i + G];
453 s->temp[0][4 * i + B] = get_vlc2(&s->gb, s->vlc[0].table, VLC_BITS, 3);
454 s->temp[0][4 * i + G] = get_vlc2(&s->gb, s->vlc[1].table, VLC_BITS, 3);
455 s->temp[0][4 * i + R] = get_vlc2(&s->gb, s->vlc[2].table, VLC_BITS, 3);
458 s->temp[0][4 * i + A] = get_vlc2(&s->gb, s->vlc[2].table, VLC_BITS, 3);
462 static void decode_bgr_bitstream(HYuvContext *s, int count)
464 if (s->decorrelate) {
465 if (s->bitstream_bpp==24)
466 decode_bgr_1(s, count, 1, 0);
468 decode_bgr_1(s, count, 1, 1);
470 if (s->bitstream_bpp==24)
471 decode_bgr_1(s, count, 0, 0);
473 decode_bgr_1(s, count, 0, 1);
477 static void draw_slice(HYuvContext *s, int y)
480 int offset[AV_NUM_DATA_POINTERS];
482 if (s->avctx->draw_horiz_band==NULL)
485 h = y - s->last_slice_end;
488 if (s->bitstream_bpp == 12) {
494 offset[0] = s->picture.linesize[0]*y;
495 offset[1] = s->picture.linesize[1]*cy;
496 offset[2] = s->picture.linesize[2]*cy;
497 for (i = 3; i < AV_NUM_DATA_POINTERS; i++)
501 s->avctx->draw_horiz_band(s->avctx, &s->picture, offset, y, 3, h);
503 s->last_slice_end = y + h;
506 static int decode_frame(AVCodecContext *avctx, void *data, int *got_frame,
509 const uint8_t *buf = avpkt->data;
510 int buf_size = avpkt->size;
511 HYuvContext *s = avctx->priv_data;
512 const int width = s->width;
513 const int width2 = s->width>>1;
514 const int height = s->height;
515 int fake_ystride, fake_ustride, fake_vstride;
516 AVFrame * const p = &s->picture;
517 int table_size = 0, ret;
519 AVFrame *picture = data;
521 av_fast_padded_malloc(&s->bitstream_buffer,
522 &s->bitstream_buffer_size,
524 if (!s->bitstream_buffer)
525 return AVERROR(ENOMEM);
527 s->dsp.bswap_buf((uint32_t*)s->bitstream_buffer,
528 (const uint32_t*)buf, buf_size / 4);
531 ff_thread_release_buffer(avctx, p);
534 if ((ret = ff_thread_get_buffer(avctx, p)) < 0) {
535 av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
540 table_size = read_huffman_tables(s, s->bitstream_buffer, buf_size);
542 return AVERROR_INVALIDDATA;
545 if ((unsigned)(buf_size-table_size) >= INT_MAX / 8)
546 return AVERROR_INVALIDDATA;
548 init_get_bits(&s->gb, s->bitstream_buffer+table_size,
549 (buf_size-table_size) * 8);
551 fake_ystride = s->interlaced ? p->linesize[0] * 2 : p->linesize[0];
552 fake_ustride = s->interlaced ? p->linesize[1] * 2 : p->linesize[1];
553 fake_vstride = s->interlaced ? p->linesize[2] * 2 : p->linesize[2];
555 s->last_slice_end = 0;
557 if (s->bitstream_bpp < 24) {
559 int lefty, leftu, leftv;
560 int lefttopy, lefttopu, lefttopv;
563 p->data[0][3] = get_bits(&s->gb, 8);
564 p->data[0][2] = get_bits(&s->gb, 8);
565 p->data[0][1] = get_bits(&s->gb, 8);
566 p->data[0][0] = get_bits(&s->gb, 8);
568 av_log(avctx, AV_LOG_ERROR,
569 "YUY2 output is not implemented yet\n");
570 return AVERROR_PATCHWELCOME;
573 leftv = p->data[2][0] = get_bits(&s->gb, 8);
574 lefty = p->data[0][1] = get_bits(&s->gb, 8);
575 leftu = p->data[1][0] = get_bits(&s->gb, 8);
576 p->data[0][0] = get_bits(&s->gb, 8);
578 switch (s->predictor) {
581 decode_422_bitstream(s, width-2);
582 lefty = s->dsp.add_hfyu_left_prediction(p->data[0] + 2, s->temp[0], width-2, lefty);
583 if (!(s->flags&CODEC_FLAG_GRAY)) {
584 leftu = s->dsp.add_hfyu_left_prediction(p->data[1] + 1, s->temp[1], width2 - 1, leftu);
585 leftv = s->dsp.add_hfyu_left_prediction(p->data[2] + 1, s->temp[2], width2 - 1, leftv);
588 for (cy = y = 1; y < s->height; y++, cy++) {
589 uint8_t *ydst, *udst, *vdst;
591 if (s->bitstream_bpp == 12) {
592 decode_gray_bitstream(s, width);
594 ydst = p->data[0] + p->linesize[0] * y;
596 lefty = s->dsp.add_hfyu_left_prediction(ydst, s->temp[0], width, lefty);
597 if (s->predictor == PLANE) {
598 if (y > s->interlaced)
599 s->dsp.add_bytes(ydst, ydst - fake_ystride, width);
602 if (y >= s->height) break;
607 ydst = p->data[0] + p->linesize[0]*y;
608 udst = p->data[1] + p->linesize[1]*cy;
609 vdst = p->data[2] + p->linesize[2]*cy;
611 decode_422_bitstream(s, width);
612 lefty = s->dsp.add_hfyu_left_prediction(ydst, s->temp[0], width, lefty);
613 if (!(s->flags & CODEC_FLAG_GRAY)) {
614 leftu= s->dsp.add_hfyu_left_prediction(udst, s->temp[1], width2, leftu);
615 leftv= s->dsp.add_hfyu_left_prediction(vdst, s->temp[2], width2, leftv);
617 if (s->predictor == PLANE) {
618 if (cy > s->interlaced) {
619 s->dsp.add_bytes(ydst, ydst - fake_ystride, width);
620 if (!(s->flags & CODEC_FLAG_GRAY)) {
621 s->dsp.add_bytes(udst, udst - fake_ustride, width2);
622 s->dsp.add_bytes(vdst, vdst - fake_vstride, width2);
627 draw_slice(s, height);
631 /* first line except first 2 pixels is left predicted */
632 decode_422_bitstream(s, width - 2);
633 lefty= s->dsp.add_hfyu_left_prediction(p->data[0] + 2, s->temp[0], width - 2, lefty);
634 if (!(s->flags & CODEC_FLAG_GRAY)) {
635 leftu = s->dsp.add_hfyu_left_prediction(p->data[1] + 1, s->temp[1], width2 - 1, leftu);
636 leftv = s->dsp.add_hfyu_left_prediction(p->data[2] + 1, s->temp[2], width2 - 1, leftv);
641 /* second line is left predicted for interlaced case */
643 decode_422_bitstream(s, width);
644 lefty = s->dsp.add_hfyu_left_prediction(p->data[0] + p->linesize[0], s->temp[0], width, lefty);
645 if (!(s->flags & CODEC_FLAG_GRAY)) {
646 leftu = s->dsp.add_hfyu_left_prediction(p->data[1] + p->linesize[2], s->temp[1], width2, leftu);
647 leftv = s->dsp.add_hfyu_left_prediction(p->data[2] + p->linesize[1], s->temp[2], width2, leftv);
652 /* next 4 pixels are left predicted too */
653 decode_422_bitstream(s, 4);
654 lefty = s->dsp.add_hfyu_left_prediction(p->data[0] + fake_ystride, s->temp[0], 4, lefty);
655 if (!(s->flags&CODEC_FLAG_GRAY)) {
656 leftu = s->dsp.add_hfyu_left_prediction(p->data[1] + fake_ustride, s->temp[1], 2, leftu);
657 leftv = s->dsp.add_hfyu_left_prediction(p->data[2] + fake_vstride, s->temp[2], 2, leftv);
660 /* next line except the first 4 pixels is median predicted */
661 lefttopy = p->data[0][3];
662 decode_422_bitstream(s, width - 4);
663 s->dsp.add_hfyu_median_prediction(p->data[0] + fake_ystride+4, p->data[0]+4, s->temp[0], width-4, &lefty, &lefttopy);
664 if (!(s->flags&CODEC_FLAG_GRAY)) {
665 lefttopu = p->data[1][1];
666 lefttopv = p->data[2][1];
667 s->dsp.add_hfyu_median_prediction(p->data[1] + fake_ustride+2, p->data[1] + 2, s->temp[1], width2 - 2, &leftu, &lefttopu);
668 s->dsp.add_hfyu_median_prediction(p->data[2] + fake_vstride+2, p->data[2] + 2, s->temp[2], width2 - 2, &leftv, &lefttopv);
672 for (; y<height; y++, cy++) {
673 uint8_t *ydst, *udst, *vdst;
675 if (s->bitstream_bpp == 12) {
677 decode_gray_bitstream(s, width);
678 ydst = p->data[0] + p->linesize[0] * y;
679 s->dsp.add_hfyu_median_prediction(ydst, ydst - fake_ystride, s->temp[0], width, &lefty, &lefttopy);
682 if (y >= height) break;
686 decode_422_bitstream(s, width);
688 ydst = p->data[0] + p->linesize[0] * y;
689 udst = p->data[1] + p->linesize[1] * cy;
690 vdst = p->data[2] + p->linesize[2] * cy;
692 s->dsp.add_hfyu_median_prediction(ydst, ydst - fake_ystride, s->temp[0], width, &lefty, &lefttopy);
693 if (!(s->flags & CODEC_FLAG_GRAY)) {
694 s->dsp.add_hfyu_median_prediction(udst, udst - fake_ustride, s->temp[1], width2, &leftu, &lefttopu);
695 s->dsp.add_hfyu_median_prediction(vdst, vdst - fake_vstride, s->temp[2], width2, &leftv, &lefttopv);
699 draw_slice(s, height);
705 int leftr, leftg, leftb, lefta;
706 const int last_line = (height - 1) * p->linesize[0];
708 if (s->bitstream_bpp == 32) {
709 lefta = p->data[0][last_line+A] = get_bits(&s->gb, 8);
710 leftr = p->data[0][last_line+R] = get_bits(&s->gb, 8);
711 leftg = p->data[0][last_line+G] = get_bits(&s->gb, 8);
712 leftb = p->data[0][last_line+B] = get_bits(&s->gb, 8);
714 leftr = p->data[0][last_line+R] = get_bits(&s->gb, 8);
715 leftg = p->data[0][last_line+G] = get_bits(&s->gb, 8);
716 leftb = p->data[0][last_line+B] = get_bits(&s->gb, 8);
717 lefta = p->data[0][last_line+A] = 255;
718 skip_bits(&s->gb, 8);
722 switch (s->predictor) {
725 decode_bgr_bitstream(s, width - 1);
726 s->dsp.add_hfyu_left_prediction_bgr32(p->data[0] + last_line+4, s->temp[0], width - 1, &leftr, &leftg, &leftb, &lefta);
728 for (y = s->height - 2; y >= 0; y--) { //Yes it is stored upside down.
729 decode_bgr_bitstream(s, width);
731 s->dsp.add_hfyu_left_prediction_bgr32(p->data[0] + p->linesize[0]*y, s->temp[0], width, &leftr, &leftg, &leftb, &lefta);
732 if (s->predictor == PLANE) {
733 if (s->bitstream_bpp != 32) lefta = 0;
734 if ((y & s->interlaced) == 0 &&
735 y < s->height - 1 - s->interlaced) {
736 s->dsp.add_bytes(p->data[0] + p->linesize[0] * y,
737 p->data[0] + p->linesize[0] * y +
738 fake_ystride, fake_ystride);
742 // just 1 large slice as this is not possible in reverse order
743 draw_slice(s, height);
746 av_log(avctx, AV_LOG_ERROR,
747 "prediction type not supported!\n");
750 av_log(avctx, AV_LOG_ERROR,
751 "BGR24 output is not implemented yet\n");
752 return AVERROR_PATCHWELCOME;
760 return (get_bits_count(&s->gb) + 31) / 32 * 4 + table_size;
763 static av_cold int decode_end(AVCodecContext *avctx)
765 HYuvContext *s = avctx->priv_data;
768 if (s->picture.data[0])
769 avctx->release_buffer(avctx, &s->picture);
771 ff_huffyuv_common_end(s);
772 av_freep(&s->bitstream_buffer);
774 for (i = 0; i < 6; i++) {
775 ff_free_vlc(&s->vlc[i]);
781 #if CONFIG_HUFFYUV_DECODER
782 AVCodec ff_huffyuv_decoder = {
784 .type = AVMEDIA_TYPE_VIDEO,
785 .id = AV_CODEC_ID_HUFFYUV,
786 .priv_data_size = sizeof(HYuvContext),
789 .decode = decode_frame,
790 .capabilities = CODEC_CAP_DR1 | CODEC_CAP_DRAW_HORIZ_BAND |
791 CODEC_CAP_FRAME_THREADS,
792 .init_thread_copy = ONLY_IF_THREADS_ENABLED(decode_init_thread_copy),
793 .long_name = NULL_IF_CONFIG_SMALL("Huffyuv / HuffYUV"),
797 #if CONFIG_FFVHUFF_DECODER
798 AVCodec ff_ffvhuff_decoder = {
800 .type = AVMEDIA_TYPE_VIDEO,
801 .id = AV_CODEC_ID_FFVHUFF,
802 .priv_data_size = sizeof(HYuvContext),
805 .decode = decode_frame,
806 .capabilities = CODEC_CAP_DR1 | CODEC_CAP_DRAW_HORIZ_BAND |
807 CODEC_CAP_FRAME_THREADS,
808 .init_thread_copy = ONLY_IF_THREADS_ENABLED(decode_init_thread_copy),
809 .long_name = NULL_IF_CONFIG_SMALL("Huffyuv FFmpeg variant"),