GCC Code Coverage Report
Directory: ../../../ffmpeg/ Exec Total Coverage
File: src/libavcodec/huffyuvdec.c Lines: 392 761 51.5 %
Date: 2020-09-21 17:35:45 Branches: 320 587 54.5 %

Line Branch Exec Source
1
/*
2
 * huffyuv decoder
3
 *
4
 * Copyright (c) 2002-2014 Michael Niedermayer <michaelni@gmx.at>
5
 *
6
 * see http://www.pcisys.net/~melanson/codecs/huffyuv.txt for a description of
7
 * the algorithm used
8
 *
9
 * This file is part of FFmpeg.
10
 *
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.
15
 *
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.
20
 *
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
24
 *
25
 * yuva, gray, 4:4:4, 4:1:1, 4:1:0 and >8 bit per sample support sponsored by NOA
26
 */
27
28
/**
29
 * @file
30
 * huffyuv decoder
31
 */
32
33
#define UNCHECKED_BITSTREAM_READER 1
34
35
#include "avcodec.h"
36
#include "get_bits.h"
37
#include "huffyuv.h"
38
#include "huffyuvdsp.h"
39
#include "lossless_videodsp.h"
40
#include "thread.h"
41
#include "libavutil/imgutils.h"
42
#include "libavutil/pixdesc.h"
43
44
#define classic_shift_luma_table_size 42
45
static const unsigned char classic_shift_luma[classic_shift_luma_table_size + AV_INPUT_BUFFER_PADDING_SIZE] = {
46
    34, 36, 35, 69, 135, 232,   9, 16, 10, 24,  11,  23,  12,  16, 13, 10,
47
    14,  8, 15,  8,  16,   8,  17, 20, 16, 10, 207, 206, 205, 236, 11,  8,
48
    10, 21,  9, 23,   8,   8, 199, 70, 69, 68,   0,
49
  0,0,0,0,0,0,0,0,
50
};
51
52
#define classic_shift_chroma_table_size 59
53
static const unsigned char classic_shift_chroma[classic_shift_chroma_table_size + AV_INPUT_BUFFER_PADDING_SIZE] = {
54
    66, 36,  37,  38, 39, 40,  41,  75,  76,  77, 110, 239, 144, 81, 82,  83,
55
    84, 85, 118, 183, 56, 57,  88,  89,  56,  89, 154,  57,  58, 57, 26, 141,
56
    57, 56,  58,  57, 58, 57, 184, 119, 214, 245, 116,  83,  82, 49, 80,  79,
57
    78, 77,  44,  75, 41, 40,  39,  38,  37,  36,  34,  0,
58
  0,0,0,0,0,0,0,0,
59
};
60
61
static const unsigned char classic_add_luma[256] = {
62
     3,  9,  5, 12, 10, 35, 32, 29, 27, 50, 48, 45, 44, 41, 39, 37,
63
    73, 70, 68, 65, 64, 61, 58, 56, 53, 50, 49, 46, 44, 41, 38, 36,
64
    68, 65, 63, 61, 58, 55, 53, 51, 48, 46, 45, 43, 41, 39, 38, 36,
65
    35, 33, 32, 30, 29, 27, 26, 25, 48, 47, 46, 44, 43, 41, 40, 39,
66
    37, 36, 35, 34, 32, 31, 30, 28, 27, 26, 24, 23, 22, 20, 19, 37,
67
    35, 34, 33, 31, 30, 29, 27, 26, 24, 23, 21, 20, 18, 17, 15, 29,
68
    27, 26, 24, 22, 21, 19, 17, 16, 14, 26, 25, 23, 21, 19, 18, 16,
69
    15, 27, 25, 23, 21, 19, 17, 16, 14, 26, 25, 23, 21, 18, 17, 14,
70
    12, 17, 19, 13,  4,  9,  2, 11,  1,  7,  8,  0, 16,  3, 14,  6,
71
    12, 10,  5, 15, 18, 11, 10, 13, 15, 16, 19, 20, 22, 24, 27, 15,
72
    18, 20, 22, 24, 26, 14, 17, 20, 22, 24, 27, 15, 18, 20, 23, 25,
73
    28, 16, 19, 22, 25, 28, 32, 36, 21, 25, 29, 33, 38, 42, 45, 49,
74
    28, 31, 34, 37, 40, 42, 44, 47, 49, 50, 52, 54, 56, 57, 59, 60,
75
    62, 64, 66, 67, 69, 35, 37, 39, 40, 42, 43, 45, 47, 48, 51, 52,
76
    54, 55, 57, 59, 60, 62, 63, 66, 67, 69, 71, 72, 38, 40, 42, 43,
77
    46, 47, 49, 51, 26, 28, 30, 31, 33, 34, 18, 19, 11, 13,  7,  8,
78
};
79
80
static const unsigned char classic_add_chroma[256] = {
81
     3,    1,   2,   2,   2,   2,   3,   3,   7,   5,   7,   5,   8,   6,  11,   9,
82
     7,   13,  11,  10,   9,   8,   7,   5,   9,   7,   6,   4,   7,   5,   8,   7,
83
     11,   8,  13,  11,  19,  15,  22,  23,  20,  33,  32,  28,  27,  29,  51,  77,
84
     43,  45,  76,  81,  46,  82,  75,  55,  56, 144,  58,  80,  60,  74, 147,  63,
85
    143,  65,  66,  67,  68,  69,  70,  71,  72,  73,  74,  75,  76,  77,  78,  79,
86
     80,  81,  82,  83,  84,  85,  86,  87,  88,  89,  90,  91,  27,  30,  21,  22,
87
     17,  14,   5,   6, 100,  54,  47,  50,  51,  53, 106, 107, 108, 109, 110, 111,
88
    112, 113, 114, 115,   4, 117, 118,  92,  94, 121, 122,   3, 124, 103,   2,   1,
89
      0, 129, 130, 131, 120, 119, 126, 125, 136, 137, 138, 139, 140, 141, 142, 134,
90
    135, 132, 133, 104,  64, 101,  62,  57, 102,  95,  93,  59,  61,  28,  97,  96,
91
     52,  49,  48,  29,  32,  25,  24,  46,  23,  98,  45,  44,  43,  20,  42,  41,
92
     19,  18,  99,  40,  15,  39,  38,  16,  13,  12,  11,  37,  10,   9,   8,  36,
93
      7, 128, 127, 105, 123, 116,  35,  34,  33, 145,  31,  79,  42, 146,  78,  26,
94
     83,  48,  49,  50,  44,  47,  26,  31,  30,  18,  17,  19,  21,  24,  25,  13,
95
     14,  16,  17,  18,  20,  21,  12,  14,  15,   9,  10,   6,   9,   6,   5,   8,
96
      6,  12,   8,  10,   7,   9,   6,   4,   6,   2,   2,   3,   3,   3,   3,   2,
97
};
98
99
255
static int read_len_table(uint8_t *dst, GetBitContext *gb, int n)
100
{
101
    int i, val, repeat;
102
103
9582
    for (i = 0; i < n;) {
104
9327
        repeat = get_bits(gb, 3);
105
9327
        val    = get_bits(gb, 5);
106
9327
        if (repeat == 0)
107
5055
            repeat = get_bits(gb, 8);
108

9327
        if (i + repeat > n || get_bits_left(gb) < 0) {
109
            av_log(NULL, AV_LOG_ERROR, "Error reading huffman table\n");
110
            return AVERROR_INVALIDDATA;
111
        }
112
572271
        while (repeat--)
113
562944
            dst[i++] = val;
114
    }
115
255
    return 0;
116
}
117
118
85
static int generate_joint_tables(HYuvContext *s)
119
{
120
    int ret;
121
85
    uint16_t *symbols = av_mallocz(5 << VLC_BITS);
122
    uint16_t *bits;
123
    uint8_t *len;
124
85
    if (!symbols)
125
        return AVERROR(ENOMEM);
126
85
    bits = symbols + (1 << VLC_BITS);
127
85
    len = (uint8_t *)(bits + (1 << VLC_BITS));
128
129

154
    if (s->bitstream_bpp < 24 || s->version > 2) {
130
        int p, i, y, u;
131
345
        for (p = 0; p < 4; p++) {
132
276
            int p0 = s->version > 2 ? p : 0;
133
734484
            for (i = y = 0; y < s->vlc_n; y++) {
134
734208
                int len0  = s->len[p0][y];
135
734208
                int limit = VLC_BITS - len0;
136

734208
                if (limit <= 0 || !len0)
137
718372
                    continue;
138
15836
                if ((sign_extend(y, 8) & (s->vlc_n-1)) != y)
139
                    continue;
140
36030940
                for (u = 0; u < s->vlc_n; u++) {
141
36015104
                    int len1 = s->len[p][u];
142

36015104
                    if (len1 > limit || !len1)
143
35937833
                        continue;
144
77271
                    if ((sign_extend(u, 8) & (s->vlc_n-1)) != u)
145
                        continue;
146
77271
                    av_assert0(i < (1 << VLC_BITS));
147
77271
                    len[i]     = len0 + len1;
148
77271
                    bits[i]    = (s->bits[p0][y] << len1) + s->bits[p][u];
149
77271
                    symbols[i] = (y << 8) + (u & 0xFF);
150
77271
                        i++;
151
                }
152
            }
153
276
            ff_free_vlc(&s->vlc[4 + p]);
154
276
            if ((ret = ff_init_vlc_sparse(&s->vlc[4 + p], VLC_BITS, i, len, 1, 1,
155
                                          bits, 2, 2, symbols, 2, 2, 0)) < 0)
156
                goto out;
157
        }
158
    } else {
159
16
        uint8_t (*map)[4] = (uint8_t(*)[4]) s->pix_bgr_map;
160
        int i, b, g, r, code;
161
16
        int p0 = s->decorrelate;
162
16
        int p1 = !s->decorrelate;
163
        /* Restrict the range to +/-16 because that's pretty much guaranteed
164
         * to cover all the combinations that fit in 11 bits total, and it
165
         *  does not matter if we miss a few rare codes. */
166
528
        for (i = 0, g = -16; g < 16; g++) {
167
512
            int len0   = s->len[p0][g & 255];
168
512
            int limit0 = VLC_BITS - len0;
169

512
            if (limit0 < 2 || !len0)
170
                continue;
171
16896
            for (b = -16; b < 16; b++) {
172
16384
                int len1   = s->len[p1][b & 255];
173
16384
                int limit1 = limit0 - len1;
174

16384
                if (limit1 < 1 || !len1)
175
12656
                    continue;
176
3728
                code = (s->bits[p0][g & 255] << len1) + s->bits[p1][b & 255];
177
123024
                for (r = -16; r < 16; r++) {
178
119296
                    int len2 = s->len[2][r & 255];
179

119296
                    if (len2 > limit1 || !len2)
180
108368
                        continue;
181
10928
                    av_assert0(i < (1 << VLC_BITS));
182
10928
                    len[i]  = len0 + len1 + len2;
183
10928
                    bits[i] = (code << len2) + s->bits[2][r & 255];
184
10928
                    if (s->decorrelate) {
185
10928
                        map[i][G] = g;
186
10928
                        map[i][B] = g + b;
187
10928
                        map[i][R] = g + r;
188
                    } else {
189
                        map[i][B] = g;
190
                        map[i][G] = b;
191
                        map[i][R] = r;
192
                    }
193
10928
                    i++;
194
                }
195
            }
196
        }
197
16
        ff_free_vlc(&s->vlc[4]);
198
16
        if ((ret = init_vlc(&s->vlc[4], VLC_BITS, i, len, 1, 1,
199
                            bits, 2, 2, 0)) < 0)
200
            goto out;
201
    }
202
85
    ret = 0;
203
85
out:
204
85
    av_freep(&symbols);
205
85
    return ret;
206
}
207
208
85
static int read_huffman_tables(HYuvContext *s, const uint8_t *src, int length)
209
{
210
    GetBitContext gb;
211
    int i, ret;
212
85
    int count = 3;
213
214
85
    if ((ret = init_get_bits(&gb, src, length * 8)) < 0)
215
        return ret;
216
217
85
    if (s->version > 2)
218
32
        count = 1 + s->alpha + 2*s->chroma;
219
220
340
    for (i = 0; i < count; i++) {
221
255
        if ((ret = read_len_table(s->len[i], &gb, s->vlc_n)) < 0)
222
            return ret;
223
255
        if ((ret = ff_huffyuv_generate_bits_table(s->bits[i], s->len[i], s->vlc_n)) < 0)
224
            return ret;
225
255
        ff_free_vlc(&s->vlc[i]);
226
255
        if ((ret = init_vlc(&s->vlc[i], VLC_BITS, s->vlc_n, s->len[i], 1, 1,
227
                           s->bits[i], 4, 4, 0)) < 0)
228
            return ret;
229
    }
230
231
85
    if ((ret = generate_joint_tables(s)) < 0)
232
        return ret;
233
234
85
    return (get_bits_count(&gb) + 7) / 8;
235
}
236
237
static int read_old_huffman_tables(HYuvContext *s)
238
{
239
    GetBitContext gb;
240
    int i, ret;
241
242
    init_get_bits(&gb, classic_shift_luma,
243
                  classic_shift_luma_table_size * 8);
244
    if ((ret = read_len_table(s->len[0], &gb, 256)) < 0)
245
        return ret;
246
247
    init_get_bits(&gb, classic_shift_chroma,
248
                  classic_shift_chroma_table_size * 8);
249
    if ((ret = read_len_table(s->len[1], &gb, 256)) < 0)
250
        return ret;
251
252
    for (i = 0; i < 256; i++)
253
        s->bits[0][i] = classic_add_luma[i];
254
    for (i = 0; i < 256; i++)
255
        s->bits[1][i] = classic_add_chroma[i];
256
257
    if (s->bitstream_bpp >= 24) {
258
        memcpy(s->bits[1], s->bits[0], 256 * sizeof(uint32_t));
259
        memcpy(s->len[1], s->len[0], 256 * sizeof(uint8_t));
260
    }
261
    memcpy(s->bits[2], s->bits[1], 256 * sizeof(uint32_t));
262
    memcpy(s->len[2], s->len[1], 256 * sizeof(uint8_t));
263
264
    for (i = 0; i < 4; i++) {
265
        ff_free_vlc(&s->vlc[i]);
266
        if ((ret = init_vlc(&s->vlc[i], VLC_BITS, 256, s->len[i], 1, 1,
267
                            s->bits[i], 4, 4, 0)) < 0)
268
            return ret;
269
    }
270
271
    if ((ret = generate_joint_tables(s)) < 0)
272
        return ret;
273
274
    return 0;
275
}
276
277
85
static av_cold int decode_end(AVCodecContext *avctx)
278
{
279
85
    HYuvContext *s = avctx->priv_data;
280
    int i;
281
282
85
    ff_huffyuv_common_end(s);
283
85
    av_freep(&s->bitstream_buffer);
284
285
765
    for (i = 0; i < 8; i++)
286
680
        ff_free_vlc(&s->vlc[i]);
287
288
85
    return 0;
289
}
290
291
85
static av_cold int decode_init(AVCodecContext *avctx)
292
{
293
85
    HYuvContext *s = avctx->priv_data;
294
    int ret;
295
296
85
    ret = av_image_check_size(avctx->width, avctx->height, 0, avctx);
297
85
    if (ret < 0)
298
        return ret;
299
300
85
    ff_huffyuvdsp_init(&s->hdsp, avctx->pix_fmt);
301
85
    ff_llviddsp_init(&s->llviddsp);
302
85
    memset(s->vlc, 0, 4 * sizeof(VLC));
303
304
85
    s->interlaced = avctx->height > 288;
305
85
    s->bgr32      = 1;
306
307
85
    if (avctx->extradata_size) {
308
85
        if ((avctx->bits_per_coded_sample & 7) &&
309
28
            avctx->bits_per_coded_sample != 12)
310
            s->version = 1; // do such files exist at all?
311

85
        else if (avctx->extradata_size > 3 && avctx->extradata[3] == 0)
312
53
            s->version = 2;
313
        else
314
32
            s->version = 3;
315
    } else
316
        s->version = 0;
317
318
85
    s->bps = 8;
319
85
    s->n = 1<<s->bps;
320
85
    s->vlc_n = FFMIN(s->n, MAX_VLC_N);
321
85
    s->chroma = 1;
322
85
    if (s->version >= 2) {
323
        int method, interlace;
324
325
85
        if (avctx->extradata_size < 4)
326
            return AVERROR_INVALIDDATA;
327
328
85
        method           = avctx->extradata[0];
329
85
        s->decorrelate   = method & 64 ? 1 : 0;
330
85
        s->predictor     = method & 63;
331
85
        if (s->version == 2) {
332
53
            s->bitstream_bpp = avctx->extradata[1];
333
53
            if (s->bitstream_bpp == 0)
334
                s->bitstream_bpp = avctx->bits_per_coded_sample & ~7;
335
        } else {
336
32
            s->bps = (avctx->extradata[1] >> 4) + 1;
337
32
            s->n = 1<<s->bps;
338
32
            s->vlc_n = FFMIN(s->n, MAX_VLC_N);
339
32
            s->chroma_h_shift = avctx->extradata[1] & 3;
340
32
            s->chroma_v_shift = (avctx->extradata[1] >> 2) & 3;
341
32
            s->yuv   = !!(avctx->extradata[2] & 1);
342
32
            s->chroma= !!(avctx->extradata[2] & 3);
343
32
            s->alpha = !!(avctx->extradata[2] & 4);
344
        }
345
85
        interlace     = (avctx->extradata[2] & 0x30) >> 4;
346

85
        s->interlaced = (interlace == 1) ? 1 : (interlace == 2) ? 0 : s->interlaced;
347
85
        s->context    = avctx->extradata[2] & 0x40 ? 1 : 0;
348
349
85
        if ((ret = read_huffman_tables(s, avctx->extradata + 4,
350
85
                                       avctx->extradata_size - 4)) < 0)
351
            goto error;
352
    } else {
353
        switch (avctx->bits_per_coded_sample & 7) {
354
        case 1:
355
            s->predictor   = LEFT;
356
            s->decorrelate = 0;
357
            break;
358
        case 2:
359
            s->predictor   = LEFT;
360
            s->decorrelate = 1;
361
            break;
362
        case 3:
363
            s->predictor   = PLANE;
364
            s->decorrelate = avctx->bits_per_coded_sample >= 24;
365
            break;
366
        case 4:
367
            s->predictor   = MEDIAN;
368
            s->decorrelate = 0;
369
            break;
370
        default:
371
            s->predictor   = LEFT; // OLD
372
            s->decorrelate = 0;
373
            break;
374
        }
375
        s->bitstream_bpp = avctx->bits_per_coded_sample & ~7;
376
        s->context       = 0;
377
378
        if ((ret = read_old_huffman_tables(s)) < 0)
379
            goto error;
380
    }
381
382
85
    if (s->version <= 2) {
383

53
        switch (s->bitstream_bpp) {
384
28
        case 12:
385
28
            avctx->pix_fmt = AV_PIX_FMT_YUV420P;
386
28
            s->yuv = 1;
387
28
            break;
388
9
        case 16:
389
9
            if (s->yuy2)
390
                avctx->pix_fmt = AV_PIX_FMT_YUYV422;
391
            else
392
9
                avctx->pix_fmt = AV_PIX_FMT_YUV422P;
393
9
            s->yuv = 1;
394
9
            break;
395
8
        case 24:
396
8
            if (s->bgr32)
397
8
                avctx->pix_fmt = AV_PIX_FMT_0RGB32;
398
            else
399
                avctx->pix_fmt = AV_PIX_FMT_BGR24;
400
8
            break;
401
8
        case 32:
402
8
            av_assert0(s->bgr32);
403
8
            avctx->pix_fmt = AV_PIX_FMT_RGB32;
404
8
            s->alpha = 1;
405
8
            break;
406
        default:
407
            ret = AVERROR_INVALIDDATA;
408
            goto error;
409
        }
410
53
        av_pix_fmt_get_chroma_sub_sample(avctx->pix_fmt,
411
                                         &s->chroma_h_shift,
412
                                         &s->chroma_v_shift);
413
    } else {
414










32
        switch ( (s->chroma<<10) | (s->yuv<<9) | (s->alpha<<8) | ((s->bps-1)<<4) | s->chroma_h_shift | (s->chroma_v_shift<<2)) {
415
        case 0x070:
416
            avctx->pix_fmt = AV_PIX_FMT_GRAY8;
417
            break;
418
        case 0x0F0:
419
            avctx->pix_fmt = AV_PIX_FMT_GRAY16;
420
            break;
421
        case 0x470:
422
            avctx->pix_fmt = AV_PIX_FMT_GBRP;
423
            break;
424
        case 0x480:
425
            avctx->pix_fmt = AV_PIX_FMT_GBRP9;
426
            break;
427
        case 0x490:
428
            avctx->pix_fmt = AV_PIX_FMT_GBRP10;
429
            break;
430
        case 0x4B0:
431
            avctx->pix_fmt = AV_PIX_FMT_GBRP12;
432
            break;
433
        case 0x4D0:
434
            avctx->pix_fmt = AV_PIX_FMT_GBRP14;
435
            break;
436
        case 0x4F0:
437
            avctx->pix_fmt = AV_PIX_FMT_GBRP16;
438
            break;
439
        case 0x570:
440
            avctx->pix_fmt = AV_PIX_FMT_GBRAP;
441
            break;
442
8
        case 0x670:
443
8
            avctx->pix_fmt = AV_PIX_FMT_YUV444P;
444
8
            break;
445
        case 0x680:
446
            avctx->pix_fmt = AV_PIX_FMT_YUV444P9;
447
            break;
448
        case 0x690:
449
            avctx->pix_fmt = AV_PIX_FMT_YUV444P10;
450
            break;
451
        case 0x6B0:
452
            avctx->pix_fmt = AV_PIX_FMT_YUV444P12;
453
            break;
454
        case 0x6D0:
455
            avctx->pix_fmt = AV_PIX_FMT_YUV444P14;
456
            break;
457
8
        case 0x6F0:
458
8
            avctx->pix_fmt = AV_PIX_FMT_YUV444P16;
459
8
            break;
460
        case 0x671:
461
            avctx->pix_fmt = AV_PIX_FMT_YUV422P;
462
            break;
463
        case 0x681:
464
            avctx->pix_fmt = AV_PIX_FMT_YUV422P9;
465
            break;
466
8
        case 0x691:
467
8
            avctx->pix_fmt = AV_PIX_FMT_YUV422P10;
468
8
            break;
469
        case 0x6B1:
470
            avctx->pix_fmt = AV_PIX_FMT_YUV422P12;
471
            break;
472
        case 0x6D1:
473
            avctx->pix_fmt = AV_PIX_FMT_YUV422P14;
474
            break;
475
        case 0x6F1:
476
            avctx->pix_fmt = AV_PIX_FMT_YUV422P16;
477
            break;
478
        case 0x672:
479
            avctx->pix_fmt = AV_PIX_FMT_YUV411P;
480
            break;
481
        case 0x674:
482
            avctx->pix_fmt = AV_PIX_FMT_YUV440P;
483
            break;
484
        case 0x675:
485
            avctx->pix_fmt = AV_PIX_FMT_YUV420P;
486
            break;
487
        case 0x685:
488
            avctx->pix_fmt = AV_PIX_FMT_YUV420P9;
489
            break;
490
        case 0x695:
491
            avctx->pix_fmt = AV_PIX_FMT_YUV420P10;
492
            break;
493
8
        case 0x6B5:
494
8
            avctx->pix_fmt = AV_PIX_FMT_YUV420P12;
495
8
            break;
496
        case 0x6D5:
497
            avctx->pix_fmt = AV_PIX_FMT_YUV420P14;
498
            break;
499
        case 0x6F5:
500
            avctx->pix_fmt = AV_PIX_FMT_YUV420P16;
501
            break;
502
        case 0x67A:
503
            avctx->pix_fmt = AV_PIX_FMT_YUV410P;
504
            break;
505
        case 0x770:
506
            avctx->pix_fmt = AV_PIX_FMT_YUVA444P;
507
            break;
508
        case 0x780:
509
            avctx->pix_fmt = AV_PIX_FMT_YUVA444P9;
510
            break;
511
        case 0x790:
512
            avctx->pix_fmt = AV_PIX_FMT_YUVA444P10;
513
            break;
514
        case 0x7F0:
515
            avctx->pix_fmt = AV_PIX_FMT_YUVA444P16;
516
            break;
517
        case 0x771:
518
            avctx->pix_fmt = AV_PIX_FMT_YUVA422P;
519
            break;
520
        case 0x781:
521
            avctx->pix_fmt = AV_PIX_FMT_YUVA422P9;
522
            break;
523
        case 0x791:
524
            avctx->pix_fmt = AV_PIX_FMT_YUVA422P10;
525
            break;
526
        case 0x7F1:
527
            avctx->pix_fmt = AV_PIX_FMT_YUVA422P16;
528
            break;
529
        case 0x775:
530
            avctx->pix_fmt = AV_PIX_FMT_YUVA420P;
531
            break;
532
        case 0x785:
533
            avctx->pix_fmt = AV_PIX_FMT_YUVA420P9;
534
            break;
535
        case 0x795:
536
            avctx->pix_fmt = AV_PIX_FMT_YUVA420P10;
537
            break;
538
        case 0x7F5:
539
            avctx->pix_fmt = AV_PIX_FMT_YUVA420P16;
540
            break;
541
        default:
542
            ret = AVERROR_INVALIDDATA;
543
            goto error;
544
        }
545
    }
546
547
85
    ff_huffyuv_common_init(avctx);
548
549

85
    if ((avctx->pix_fmt == AV_PIX_FMT_YUV422P || avctx->pix_fmt == AV_PIX_FMT_YUV420P) && avctx->width & 1) {
550
        av_log(avctx, AV_LOG_ERROR, "width must be even for this colorspace\n");
551
        ret = AVERROR_INVALIDDATA;
552
        goto error;
553
    }
554

85
    if (s->predictor == MEDIAN && avctx->pix_fmt == AV_PIX_FMT_YUV422P &&
555
        avctx->width % 4) {
556
        av_log(avctx, AV_LOG_ERROR, "width must be a multiple of 4 "
557
               "for this combination of colorspace and predictor type.\n");
558
        ret = AVERROR_INVALIDDATA;
559
        goto error;
560
    }
561
562
85
    if ((ret = ff_huffyuv_alloc_temp(s)) < 0) {
563
        ff_huffyuv_common_end(s);
564
        goto error;
565
    }
566
567
85
    return 0;
568
  error:
569
    decode_end(avctx);
570
    return ret;
571
}
572
573
/** Subset of GET_VLC for use in hand-roller VLC code */
574
#define VLC_INTERN(dst, table, gb, name, bits, max_depth)   \
575
    code = table[index][0];                                 \
576
    n    = table[index][1];                                 \
577
    if (max_depth > 1 && n < 0) {                           \
578
        LAST_SKIP_BITS(name, gb, bits);                     \
579
        UPDATE_CACHE(name, gb);                             \
580
                                                            \
581
        nb_bits = -n;                                       \
582
        index   = SHOW_UBITS(name, gb, nb_bits) + code;     \
583
        code    = table[index][0];                          \
584
        n       = table[index][1];                          \
585
        if (max_depth > 2 && n < 0) {                       \
586
            LAST_SKIP_BITS(name, gb, nb_bits);              \
587
            UPDATE_CACHE(name, gb);                         \
588
                                                            \
589
            nb_bits = -n;                                   \
590
            index   = SHOW_UBITS(name, gb, nb_bits) + code; \
591
            code    = table[index][0];                      \
592
            n       = table[index][1];                      \
593
        }                                                   \
594
    }                                                       \
595
    dst = code;                                             \
596
    LAST_SKIP_BITS(name, gb, n)
597
598
599
#define GET_VLC_DUAL(dst0, dst1, name, gb, dtable, table1, table2,  \
600
                     bits, max_depth, OP)                           \
601
    do {                                                            \
602
        unsigned int index = SHOW_UBITS(name, gb, bits);            \
603
        int          code, n = dtable[index][1];                    \
604
                                                                    \
605
        if (n<=0) {                                                 \
606
            int nb_bits;                                            \
607
            VLC_INTERN(dst0, table1, gb, name, bits, max_depth);    \
608
                                                                    \
609
            UPDATE_CACHE(re, gb);                                   \
610
            index = SHOW_UBITS(name, gb, bits);                     \
611
            VLC_INTERN(dst1, table2, gb, name, bits, max_depth);    \
612
        } else {                                                    \
613
            code = dtable[index][0];                                \
614
            OP(dst0, dst1, code);                                   \
615
            LAST_SKIP_BITS(name, gb, n);                            \
616
        }                                                           \
617
    } while (0)
618
619
#define OP8bits(dst0, dst1, code) dst0 = code>>8; dst1 = code
620
621
#define READ_2PIX(dst0, dst1, plane1)                                   \
622
    UPDATE_CACHE(re, &s->gb);                                           \
623
    GET_VLC_DUAL(dst0, dst1, re, &s->gb, s->vlc[4+plane1].table,        \
624
                 s->vlc[0].table, s->vlc[plane1].table, VLC_BITS, 3, OP8bits)
625
626
70390
static void decode_422_bitstream(HYuvContext *s, int count)
627
{
628
    int i, icount;
629
70390
    OPEN_READER(re, &s->gb);
630
70390
    count /= 2;
631
632
70390
    icount = get_bits_left(&s->gb) / (32 * 4);
633
70390
    if (count >= icount) {
634
147559
        for (i = 0; i < icount; i++) {
635


145894
            READ_2PIX(s->temp[0][2 * i],     s->temp[1][i], 1);
636


145894
            READ_2PIX(s->temp[0][2 * i + 1], s->temp[2][i], 2);
637
        }
638

121205
        for (; i < count && BITS_LEFT(re, &s->gb) > 0; i++) {
639


119540
            READ_2PIX(s->temp[0][2 * i    ], s->temp[1][i], 1);
640
119540
            if (BITS_LEFT(re, &s->gb) <= 0) break;
641


119540
            READ_2PIX(s->temp[0][2 * i + 1], s->temp[2][i], 2);
642
        }
643
1665
        for (; i < count; i++)
644
            s->temp[0][2 * i    ] = s->temp[1][i] =
645
            s->temp[0][2 * i + 1] = s->temp[2][i] = 0;
646
    } else {
647
12345431
        for (i = 0; i < count; i++) {
648


12276706
            READ_2PIX(s->temp[0][2 * i],     s->temp[1][i], 1);
649


12276706
            READ_2PIX(s->temp[0][2 * i + 1], s->temp[2][i], 2);
650
        }
651
    }
652
70390
    CLOSE_READER(re, &s->gb);
653
70390
}
654
655
#define READ_2PIX_PLANE(dst0, dst1, plane, OP) \
656
    UPDATE_CACHE(re, &s->gb); \
657
    GET_VLC_DUAL(dst0, dst1, re, &s->gb, s->vlc[4+plane].table, \
658
                 s->vlc[plane].table, s->vlc[plane].table, VLC_BITS, 3, OP)
659
660
#define OP14bits(dst0, dst1, code) dst0 = code>>8; dst1 = sign_extend(code, 8)
661
662
/* TODO instead of restarting the read when the code isn't in the first level
663
 * of the joint table, jump into the 2nd level of the individual table. */
664
#define READ_2PIX_PLANE16(dst0, dst1, plane){\
665
    dst0 = get_vlc2(&s->gb, s->vlc[plane].table, VLC_BITS, 3)<<2;\
666
    dst0 += get_bits(&s->gb, 2);\
667
    dst1 = get_vlc2(&s->gb, s->vlc[plane].table, VLC_BITS, 3)<<2;\
668
    dst1 += get_bits(&s->gb, 2);\
669
}
670
493900
static void decode_plane_bitstream(HYuvContext *s, int width, int plane)
671
{
672
493900
    int i, count = width/2;
673
674
493900
    if (s->bps <= 8) {
675
134700
        OPEN_READER(re, &s->gb);
676
134700
        if (count >= (get_bits_left(&s->gb)) / (32 * 2)) {
677

213540
            for (i = 0; i < count && BITS_LEFT(re, &s->gb) > 0; i++) {
678


212153
                READ_2PIX_PLANE(s->temp[0][2 * i], s->temp[0][2 * i + 1], plane, OP8bits);
679
            }
680
        } else {
681
22817460
            for(i=0; i<count; i++){
682


22684147
                READ_2PIX_PLANE(s->temp[0][2 * i], s->temp[0][2 * i + 1], plane, OP8bits);
683
            }
684
        }
685

134700
        if( width&1 && BITS_LEFT(re, &s->gb)>0 ) {
686
            unsigned int index;
687
            int nb_bits, code, n;
688
            UPDATE_CACHE(re, &s->gb);
689
            index = SHOW_UBITS(re, &s->gb, VLC_BITS);
690
            VLC_INTERN(s->temp[0][width-1], s->vlc[plane].table,
691
                       &s->gb, re, VLC_BITS, 3);
692
        }
693
134700
        CLOSE_READER(re, &s->gb);
694
359200
    } else if (s->bps <= 14) {
695
224500
        OPEN_READER(re, &s->gb);
696
224500
        if (count >= (get_bits_left(&s->gb)) / (32 * 2)) {
697

83177
            for (i = 0; i < count && BITS_LEFT(re, &s->gb) > 0; i++) {
698


82104
                READ_2PIX_PLANE(s->temp16[0][2 * i], s->temp16[0][2 * i + 1], plane, OP14bits);
699
            }
700
        } else {
701
26851123
            for(i=0; i<count; i++){
702


26627696
                READ_2PIX_PLANE(s->temp16[0][2 * i], s->temp16[0][2 * i + 1], plane, OP14bits);
703
            }
704
        }
705

224500
        if( width&1 && BITS_LEFT(re, &s->gb)>0 ) {
706
            unsigned int index;
707
            int nb_bits, code, n;
708
5100
            UPDATE_CACHE(re, &s->gb);
709
5100
            index = SHOW_UBITS(re, &s->gb, VLC_BITS);
710

5100
            VLC_INTERN(s->temp16[0][width-1], s->vlc[plane].table,
711
                       &s->gb, re, VLC_BITS, 3);
712
        }
713
224500
        CLOSE_READER(re, &s->gb);
714
    } else {
715
134700
        if (count >= (get_bits_left(&s->gb)) / (32 * 2)) {
716

57258
            for (i = 0; i < count && get_bits_left(&s->gb) > 0; i++) {
717
56886
                READ_2PIX_PLANE16(s->temp16[0][2 * i], s->temp16[0][2 * i + 1], plane);
718
            }
719
        } else {
720
22973742
            for(i=0; i<count; i++){
721
22839414
                READ_2PIX_PLANE16(s->temp16[0][2 * i], s->temp16[0][2 * i + 1], plane);
722
            }
723
        }
724

134700
        if( width&1 && get_bits_left(&s->gb)>0 ) {
725
            int dst = get_vlc2(&s->gb, s->vlc[plane].table, VLC_BITS, 3)<<2;
726
            s->temp16[0][width-1] = dst + get_bits(&s->gb, 2);
727
        }
728
    }
729
493900
}
730
731
25490
static void decode_gray_bitstream(HYuvContext *s, int count)
732
{
733
    int i;
734
25490
    OPEN_READER(re, &s->gb);
735
25490
    count /= 2;
736
737
25490
    if (count >= (get_bits_left(&s->gb)) / (32 * 2)) {
738

75357
        for (i = 0; i < count && BITS_LEFT(re, &s->gb) > 0; i++) {
739


74930
            READ_2PIX(s->temp[0][2 * i], s->temp[0][2 * i + 1], 0);
740
        }
741
    } else {
742
4860583
        for (i = 0; i < count; i++) {
743


4835520
            READ_2PIX(s->temp[0][2 * i], s->temp[0][2 * i + 1], 0);
744
        }
745
    }
746
25490
    CLOSE_READER(re, &s->gb);
747
25490
}
748
749
89800
static av_always_inline void decode_bgr_1(HYuvContext *s, int count,
750
                                          int decorrelate, int alpha)
751
{
752
    int i;
753
89800
    OPEN_READER(re, &s->gb);
754
755

30617800
    for (i = 0; i < count && BITS_LEFT(re, &s->gb) > 0; i++) {
756
        unsigned int index;
757
        int code, n, nb_bits;
758
759
30528000
        UPDATE_CACHE(re, &s->gb);
760
30528000
        index = SHOW_UBITS(re, &s->gb, VLC_BITS);
761
30528000
        n     = s->vlc[4].table[index][1];
762
763
30528000
        if (n>0) {
764
13538088
            code  = s->vlc[4].table[index][0];
765
13538088
            *(uint32_t *) &s->temp[0][4 * i] = s->pix_bgr_map[code];
766
13538088
            LAST_SKIP_BITS(re, &s->gb, n);
767
        } else {
768
16989912
            if (decorrelate) {
769

16989912
                VLC_INTERN(s->temp[0][4 * i + G], s->vlc[1].table,
770
                           &s->gb, re, VLC_BITS, 3);
771
772
16989912
                UPDATE_CACHE(re, &s->gb);
773
16989912
                index = SHOW_UBITS(re, &s->gb, VLC_BITS);
774

16989912
                VLC_INTERN(code, s->vlc[0].table, &s->gb, re, VLC_BITS, 3);
775
16989912
                s->temp[0][4 * i + B] = code + s->temp[0][4 * i + G];
776
777
16989912
                UPDATE_CACHE(re, &s->gb);
778
16989912
                index = SHOW_UBITS(re, &s->gb, VLC_BITS);
779

16989912
                VLC_INTERN(code, s->vlc[2].table, &s->gb, re, VLC_BITS, 3);
780
16989912
                s->temp[0][4 * i + R] = code + s->temp[0][4 * i + G];
781
            } else {
782
                VLC_INTERN(s->temp[0][4 * i + B], s->vlc[0].table,
783
                           &s->gb, re, VLC_BITS, 3);
784
785
                UPDATE_CACHE(re, &s->gb);
786
                index = SHOW_UBITS(re, &s->gb, VLC_BITS);
787
                VLC_INTERN(s->temp[0][4 * i + G], s->vlc[1].table,
788
                           &s->gb, re, VLC_BITS, 3);
789
790
                UPDATE_CACHE(re, &s->gb);
791
                index = SHOW_UBITS(re, &s->gb, VLC_BITS);
792
                VLC_INTERN(s->temp[0][4 * i + R], s->vlc[2].table,
793
                           &s->gb, re, VLC_BITS, 3);
794
            }
795
        }
796
30528000
        if (alpha) {
797
15264000
            UPDATE_CACHE(re, &s->gb);
798
15264000
            index = SHOW_UBITS(re, &s->gb, VLC_BITS);
799

15264000
            VLC_INTERN(s->temp[0][4 * i + A], s->vlc[2].table,
800
                       &s->gb, re, VLC_BITS, 3);
801
        } else
802
15264000
            s->temp[0][4 * i + A] = 0;
803
    }
804
89800
    CLOSE_READER(re, &s->gb);
805
89800
}
806
807
89800
static void decode_bgr_bitstream(HYuvContext *s, int count)
808
{
809
89800
    if (s->decorrelate) {
810
89800
        if (s->bitstream_bpp == 24)
811
44900
            decode_bgr_1(s, count, 1, 0);
812
        else
813
44900
            decode_bgr_1(s, count, 1, 1);
814
    } else {
815
        if (s->bitstream_bpp == 24)
816
            decode_bgr_1(s, count, 0, 0);
817
        else
818
            decode_bgr_1(s, count, 0, 1);
819
    }
820
89800
}
821
822
71590
static void draw_slice(HYuvContext *s, AVFrame *frame, int y)
823
{
824
    int h, cy, i;
825
    int offset[AV_NUM_DATA_POINTERS];
826
827
71590
    if (!s->avctx->draw_horiz_band)
828
71590
        return;
829
830
    h  = y - s->last_slice_end;
831
    y -= h;
832
833
    if (s->bitstream_bpp == 12)
834
        cy = y >> 1;
835
    else
836
        cy = y;
837
838
    offset[0] = frame->linesize[0] * y;
839
    offset[1] = frame->linesize[1] * cy;
840
    offset[2] = frame->linesize[2] * cy;
841
    for (i = 3; i < AV_NUM_DATA_POINTERS; i++)
842
        offset[i] = 0;
843
    emms_c();
844
845
    s->avctx->draw_horiz_band(s->avctx, frame, offset, y, 3, h);
846
847
    s->last_slice_end = y + h;
848
}
849
850
493900
static int left_prediction(HYuvContext *s, uint8_t *dst, const uint8_t *src, int w, int acc)
851
{
852
493900
    if (s->bps <= 8) {
853
134700
        return s->llviddsp.add_left_pred(dst, src, w, acc);
854
    } else {
855
359200
        return s->llviddsp.add_left_pred_int16((      uint16_t *)dst, (const uint16_t *)src, s->n-1, w, acc);
856
    }
857
}
858
859
134100
static void add_bytes(HYuvContext *s, uint8_t *dst, uint8_t *src, int w)
860
{
861
134100
    if (s->bps <= 8) {
862
        s->llviddsp.add_bytes(dst, src, w);
863
    } else {
864
134100
        s->hdsp.add_int16((uint16_t*)dst, (const uint16_t*)src, s->n - 1, w);
865
    }
866
134100
}
867
868
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)
869
{
870
    if (s->bps <= 8) {
871
        s->llviddsp.add_median_pred(dst, src, diff, w, left, left_top);
872
    } else {
873
        s->hdsp.add_hfyu_median_pred_int16((uint16_t *)dst, (const uint16_t *)src, (const uint16_t *)diff, s->n-1, w, left, left_top);
874
    }
875
}
876
877
1610
static int decode_slice(AVCodecContext *avctx, AVFrame *p, int height,
878
                        int buf_size, int y_offset, int table_size)
879
{
880
1610
    HYuvContext *s = avctx->priv_data;
881
    int fake_ystride, fake_ustride, fake_vstride;
882
1610
    const int width  = s->width;
883
1610
    const int width2 = s->width >> 1;
884
    int ret;
885
886
1610
    if ((ret = init_get_bits8(&s->gb, s->bitstream_buffer + table_size, buf_size - table_size)) < 0)
887
        return ret;
888
889
1610
    fake_ystride = s->interlaced ? p->linesize[0] * 2 : p->linesize[0];
890
1610
    fake_ustride = s->interlaced ? p->linesize[1] * 2 : p->linesize[1];
891
1610
    fake_vstride = s->interlaced ? p->linesize[2] * 2 : p->linesize[2];
892
893
1610
    if (s->version > 2) {
894
        int plane;
895
3200
        for(plane = 0; plane < 1 + 2*s->chroma + s->alpha; plane++) {
896
            int left, lefttop, y;
897
2400
            int w = width;
898
2400
            int h = height;
899
2400
            int fake_stride = fake_ystride;
900
901

2400
            if (s->chroma && (plane == 1 || plane == 2)) {
902
1600
                w >>= s->chroma_h_shift;
903
1600
                h >>= s->chroma_v_shift;
904
1600
                fake_stride = plane == 1 ? fake_ustride : fake_vstride;
905
            }
906
907
2400
            switch (s->predictor) {
908
2400
            case LEFT:
909
            case PLANE:
910
2400
                decode_plane_bitstream(s, w, plane);
911
2400
                left = left_prediction(s, p->data[plane], s->temp[0], w, 0);
912
913
493900
                for (y = 1; y < h; y++) {
914
491500
                    uint8_t *dst = p->data[plane] + p->linesize[plane]*y;
915
916
491500
                    decode_plane_bitstream(s, w, plane);
917
491500
                    left = left_prediction(s, dst, s->temp[0], w, left);
918
491500
                    if (s->predictor == PLANE) {
919
134100
                        if (y > s->interlaced) {
920
134100
                            add_bytes(s, dst, dst - fake_stride, w);
921
                        }
922
                    }
923
                }
924
925
2400
                break;
926
            case MEDIAN:
927
                decode_plane_bitstream(s, w, plane);
928
                left= left_prediction(s, p->data[plane], s->temp[0], w, 0);
929
930
                y = 1;
931
                if (y >= h)
932
                    break;
933
934
                /* second line is left predicted for interlaced case */
935
                if (s->interlaced) {
936
                    decode_plane_bitstream(s, w, plane);
937
                    left = left_prediction(s, p->data[plane] + p->linesize[plane], s->temp[0], w, left);
938
                    y++;
939
                    if (y >= h)
940
                        break;
941
                }
942
943
                lefttop = p->data[plane][0];
944
                decode_plane_bitstream(s, w, plane);
945
                add_median_prediction(s, p->data[plane] + fake_stride, p->data[plane], s->temp[0], w, &left, &lefttop);
946
                y++;
947
948
                for (; y<h; y++) {
949
                    uint8_t *dst;
950
951
                    decode_plane_bitstream(s, w, plane);
952
953
                    dst = p->data[plane] + p->linesize[plane] * y;
954
955
                    add_median_prediction(s, dst, dst - fake_stride, s->temp[0], w, &left, &lefttop);
956
                }
957
958
                break;
959
            }
960
2400
        }
961
800
        draw_slice(s, p, height);
962
810
    } else if (s->bitstream_bpp < 24) {
963
        int y, cy;
964
        int lefty, leftu, leftv;
965
        int lefttopy, lefttopu, lefttopv;
966
967
410
        if (s->yuy2) {
968
            p->data[0][3] = get_bits(&s->gb, 8);
969
            p->data[0][2] = get_bits(&s->gb, 8);
970
            p->data[0][1] = get_bits(&s->gb, 8);
971
            p->data[0][0] = get_bits(&s->gb, 8);
972
973
            av_log(avctx, AV_LOG_ERROR,
974
                   "YUY2 output is not implemented yet\n");
975
            return AVERROR_PATCHWELCOME;
976
        } else {
977
410
            leftv         =
978
410
            p->data[2][0 + y_offset * p->linesize[2]] = get_bits(&s->gb, 8);
979
410
            lefty         =
980
410
            p->data[0][1 + y_offset * p->linesize[0]] = get_bits(&s->gb, 8);
981
410
            leftu         =
982
410
            p->data[1][0 + y_offset * p->linesize[1]] = get_bits(&s->gb, 8);
983
410
            p->data[0][0 + y_offset * p->linesize[0]] = get_bits(&s->gb, 8);
984
985
410
            switch (s->predictor) {
986
410
            case LEFT:
987
            case PLANE:
988
410
                decode_422_bitstream(s, width - 2);
989
820
                lefty = s->llviddsp.add_left_pred(p->data[0] + p->linesize[0] * y_offset + 2, s->temp[0],
990
410
                                                   width - 2, lefty);
991
410
                if (!(s->flags & AV_CODEC_FLAG_GRAY)) {
992
410
                    leftu = s->llviddsp.add_left_pred(p->data[1] + p->linesize[1] * y_offset + 1, s->temp[1], width2 - 1, leftu);
993
410
                    leftv = s->llviddsp.add_left_pred(p->data[2] + p->linesize[2] * y_offset + 1, s->temp[2], width2 - 1, leftv);
994
                }
995
996
70390
                for (cy = y = 1; y < height; y++, cy++) {
997
                    uint8_t *ydst, *udst, *vdst;
998
999
70190
                    if (s->bitstream_bpp == 12) {
1000
25490
                        decode_gray_bitstream(s, width);
1001
1002
25490
                        ydst = p->data[0] + p->linesize[0] * (y + y_offset);
1003
1004
25490
                        lefty = s->llviddsp.add_left_pred(ydst, s->temp[0],
1005
                                                           width, lefty);
1006
25490
                        if (s->predictor == PLANE) {
1007
                            if (y > s->interlaced)
1008
                                s->llviddsp.add_bytes(ydst, ydst - fake_ystride, width);
1009
                        }
1010
25490
                        y++;
1011
25490
                        if (y >= height)
1012
210
                            break;
1013
                    }
1014
1015
69980
                    draw_slice(s, p, y);
1016
1017
69980
                    ydst = p->data[0] + p->linesize[0] * (y  + y_offset);
1018
69980
                    udst = p->data[1] + p->linesize[1] * (cy + y_offset);
1019
69980
                    vdst = p->data[2] + p->linesize[2] * (cy + y_offset);
1020
1021
69980
                    decode_422_bitstream(s, width);
1022
69980
                    lefty = s->llviddsp.add_left_pred(ydst, s->temp[0],
1023
                                                       width, lefty);
1024
69980
                    if (!(s->flags & AV_CODEC_FLAG_GRAY)) {
1025
69980
                        leftu = s->llviddsp.add_left_pred(udst, s->temp[1], width2, leftu);
1026
69980
                        leftv = s->llviddsp.add_left_pred(vdst, s->temp[2], width2, leftv);
1027
                    }
1028
69980
                    if (s->predictor == PLANE) {
1029
                        if (cy > s->interlaced) {
1030
                            s->llviddsp.add_bytes(ydst, ydst - fake_ystride, width);
1031
                            if (!(s->flags & AV_CODEC_FLAG_GRAY)) {
1032
                                s->llviddsp.add_bytes(udst, udst - fake_ustride, width2);
1033
                                s->llviddsp.add_bytes(vdst, vdst - fake_vstride, width2);
1034
                            }
1035
                        }
1036
                    }
1037
                }
1038
410
                draw_slice(s, p, height);
1039
1040
410
                break;
1041
            case MEDIAN:
1042
                /* first line except first 2 pixels is left predicted */
1043
                decode_422_bitstream(s, width - 2);
1044
                lefty = s->llviddsp.add_left_pred(p->data[0] + 2, s->temp[0],
1045
                                                   width - 2, lefty);
1046
                if (!(s->flags & AV_CODEC_FLAG_GRAY)) {
1047
                    leftu = s->llviddsp.add_left_pred(p->data[1] + 1, s->temp[1], width2 - 1, leftu);
1048
                    leftv = s->llviddsp.add_left_pred(p->data[2] + 1, s->temp[2], width2 - 1, leftv);
1049
                }
1050
1051
                cy = y = 1;
1052
                if (y >= height)
1053
                    break;
1054
1055
                /* second line is left predicted for interlaced case */
1056
                if (s->interlaced) {
1057
                    decode_422_bitstream(s, width);
1058
                    lefty = s->llviddsp.add_left_pred(p->data[0] + p->linesize[0],
1059
                                                       s->temp[0], width, lefty);
1060
                    if (!(s->flags & AV_CODEC_FLAG_GRAY)) {
1061
                        leftu = s->llviddsp.add_left_pred(p->data[1] + p->linesize[2], s->temp[1], width2, leftu);
1062
                        leftv = s->llviddsp.add_left_pred(p->data[2] + p->linesize[1], s->temp[2], width2, leftv);
1063
                    }
1064
                    y++;
1065
                    cy++;
1066
                    if (y >= height)
1067
                        break;
1068
                }
1069
1070
                /* next 4 pixels are left predicted too */
1071
                decode_422_bitstream(s, 4);
1072
                lefty = s->llviddsp.add_left_pred(p->data[0] + fake_ystride,
1073
                                                   s->temp[0], 4, lefty);
1074
                if (!(s->flags & AV_CODEC_FLAG_GRAY)) {
1075
                    leftu = s->llviddsp.add_left_pred(p->data[1] + fake_ustride, s->temp[1], 2, leftu);
1076
                    leftv = s->llviddsp.add_left_pred(p->data[2] + fake_vstride, s->temp[2], 2, leftv);
1077
                }
1078
1079
                /* next line except the first 4 pixels is median predicted */
1080
                lefttopy = p->data[0][3];
1081
                decode_422_bitstream(s, width - 4);
1082
                s->llviddsp.add_median_pred(p->data[0] + fake_ystride + 4,
1083
                                             p->data[0] + 4, s->temp[0],
1084
                                             width - 4, &lefty, &lefttopy);
1085
                if (!(s->flags & AV_CODEC_FLAG_GRAY)) {
1086
                    lefttopu = p->data[1][1];
1087
                    lefttopv = p->data[2][1];
1088
                    s->llviddsp.add_median_pred(p->data[1] + fake_ustride + 2, p->data[1] + 2, s->temp[1], width2 - 2, &leftu, &lefttopu);
1089
                    s->llviddsp.add_median_pred(p->data[2] + fake_vstride + 2, p->data[2] + 2, s->temp[2], width2 - 2, &leftv, &lefttopv);
1090
                }
1091
                y++;
1092
                cy++;
1093
1094
                for (; y < height; y++, cy++) {
1095
                    uint8_t *ydst, *udst, *vdst;
1096
1097
                    if (s->bitstream_bpp == 12) {
1098
                        while (2 * cy > y) {
1099
                            decode_gray_bitstream(s, width);
1100
                            ydst = p->data[0] + p->linesize[0] * y;
1101
                            s->llviddsp.add_median_pred(ydst, ydst - fake_ystride,
1102
                                                         s->temp[0], width,
1103
                                                         &lefty, &lefttopy);
1104
                            y++;
1105
                        }
1106
                        if (y >= height)
1107
                            break;
1108
                    }
1109
                    draw_slice(s, p, y);
1110
1111
                    decode_422_bitstream(s, width);
1112
1113
                    ydst = p->data[0] + p->linesize[0] * y;
1114
                    udst = p->data[1] + p->linesize[1] * cy;
1115
                    vdst = p->data[2] + p->linesize[2] * cy;
1116
1117
                    s->llviddsp.add_median_pred(ydst, ydst - fake_ystride,
1118
                                                 s->temp[0], width,
1119
                                                 &lefty, &lefttopy);
1120
                    if (!(s->flags & AV_CODEC_FLAG_GRAY)) {
1121
                        s->llviddsp.add_median_pred(udst, udst - fake_ustride, s->temp[1], width2, &leftu, &lefttopu);
1122
                        s->llviddsp.add_median_pred(vdst, vdst - fake_vstride, s->temp[2], width2, &leftv, &lefttopv);
1123
                    }
1124
                }
1125
1126
                draw_slice(s, p, height);
1127
                break;
1128
            }
1129
410
        }
1130
    } else {
1131
        int y;
1132
        uint8_t left[4];
1133
400
        const int last_line = (y_offset + height - 1) * p->linesize[0];
1134
1135
400
        if (s->bitstream_bpp == 32) {
1136
200
            left[A] = p->data[0][last_line + A] = get_bits(&s->gb, 8);
1137
200
            left[R] = p->data[0][last_line + R] = get_bits(&s->gb, 8);
1138
200
            left[G] = p->data[0][last_line + G] = get_bits(&s->gb, 8);
1139
200
            left[B] = p->data[0][last_line + B] = get_bits(&s->gb, 8);
1140
        } else {
1141
200
            left[R] = p->data[0][last_line + R] = get_bits(&s->gb, 8);
1142
200
            left[G] = p->data[0][last_line + G] = get_bits(&s->gb, 8);
1143
200
            left[B] = p->data[0][last_line + B] = get_bits(&s->gb, 8);
1144
200
            left[A] = p->data[0][last_line + A] = 255;
1145
200
            skip_bits(&s->gb, 8);
1146
        }
1147
1148
400
        if (s->bgr32) {
1149
400
            switch (s->predictor) {
1150
400
            case LEFT:
1151
            case PLANE:
1152
400
                decode_bgr_bitstream(s, width - 1);
1153
400
                s->hdsp.add_hfyu_left_pred_bgr32(p->data[0] + last_line + 4,
1154
400
                                                 s->temp[0], width - 1, left);
1155
1156
89800
                for (y = height - 2; y >= 0; y--) { // Yes it is stored upside down.
1157
89400
                    decode_bgr_bitstream(s, width);
1158
1159
89400
                    s->hdsp.add_hfyu_left_pred_bgr32(p->data[0] + p->linesize[0] * (y + y_offset),
1160
89400
                                                     s->temp[0], width, left);
1161
89400
                    if (s->predictor == PLANE) {
1162
                        if (s->bitstream_bpp != 32)
1163
                            left[A] = 0;
1164
                        if (y < height - 1 - s->interlaced) {
1165
                            s->llviddsp.add_bytes(p->data[0] + p->linesize[0] * (y + y_offset),
1166
                                              p->data[0] + p->linesize[0] * (y + y_offset) +
1167
                                              fake_ystride, 4 * width);
1168
                        }
1169
                    }
1170
                }
1171
                // just 1 large slice as this is not possible in reverse order
1172
400
                draw_slice(s, p, height);
1173
400
                break;
1174
            default:
1175
                av_log(avctx, AV_LOG_ERROR,
1176
                       "prediction type not supported!\n");
1177
            }
1178
        } else {
1179
            av_log(avctx, AV_LOG_ERROR,
1180
                   "BGR24 output is not implemented yet\n");
1181
            return AVERROR_PATCHWELCOME;
1182
        }
1183
    }
1184
1185
1610
    return 0;
1186
}
1187
1188
1610
static int decode_frame(AVCodecContext *avctx, void *data, int *got_frame,
1189
                        AVPacket *avpkt)
1190
{
1191
1610
    const uint8_t *buf = avpkt->data;
1192
1610
    int buf_size       = avpkt->size;
1193
1610
    HYuvContext *s = avctx->priv_data;
1194
1610
    const int width  = s->width;
1195
1610
    const int height = s->height;
1196
1610
    ThreadFrame frame = { .f = data };
1197
1610
    AVFrame *const p = data;
1198
1610
    int slice, table_size = 0, ret, nb_slices;
1199
    unsigned slices_info_offset;
1200
    int slice_height;
1201
1202
1610
    if (buf_size < (width * height + 7)/8)
1203
        return AVERROR_INVALIDDATA;
1204
1205
1610
    av_fast_padded_malloc(&s->bitstream_buffer,
1206
                   &s->bitstream_buffer_size,
1207
                   buf_size);
1208
1610
    if (!s->bitstream_buffer)
1209
        return AVERROR(ENOMEM);
1210
1211
1610
    s->bdsp.bswap_buf((uint32_t *) s->bitstream_buffer,
1212
                      (const uint32_t *) buf, buf_size / 4);
1213
1214
1610
    if ((ret = ff_thread_get_buffer(avctx, &frame, 0)) < 0)
1215
        return ret;
1216
1217
1610
    if (s->context) {
1218
        table_size = read_huffman_tables(s, s->bitstream_buffer, buf_size);
1219
        if (table_size < 0)
1220
            return table_size;
1221
    }
1222
1223
1610
    if ((unsigned) (buf_size - table_size) >= INT_MAX / 8)
1224
        return AVERROR_INVALIDDATA;
1225
1226
1610
    s->last_slice_end = 0;
1227
1228

1610
    if (avctx->codec_id == AV_CODEC_ID_HYMT &&
1229
        (buf_size > 32 && AV_RL32(avpkt->data + buf_size - 16) == 0)) {
1230
        slices_info_offset = AV_RL32(avpkt->data + buf_size - 4);
1231
        slice_height = AV_RL32(avpkt->data + buf_size - 8);
1232
        nb_slices = AV_RL32(avpkt->data + buf_size - 12);
1233
        if (nb_slices * 8LL + slices_info_offset > buf_size - 16 ||
1234
            s->chroma_v_shift ||
1235
            slice_height <= 0 || nb_slices * (uint64_t)slice_height > height)
1236
            return AVERROR_INVALIDDATA;
1237
    } else {
1238
1610
        slice_height = height;
1239
1610
        nb_slices = 1;
1240
    }
1241
1242
3220
    for (slice = 0; slice < nb_slices; slice++) {
1243
        int y_offset, slice_offset, slice_size;
1244
1245
1610
        if (nb_slices > 1) {
1246
            slice_offset = AV_RL32(avpkt->data + slices_info_offset + slice * 8);
1247
            slice_size = AV_RL32(avpkt->data + slices_info_offset + slice * 8 + 4);
1248
1249
            if (slice_offset < 0 || slice_size <= 0 || (slice_offset&3) ||
1250
                slice_offset + (int64_t)slice_size > buf_size)
1251
                return AVERROR_INVALIDDATA;
1252
1253
            y_offset = height - (slice + 1) * slice_height;
1254
            s->bdsp.bswap_buf((uint32_t *)s->bitstream_buffer,
1255
                              (const uint32_t *)(buf + slice_offset), slice_size / 4);
1256
        } else {
1257
1610
            y_offset = 0;
1258
1610
            slice_offset = 0;
1259
1610
            slice_size = buf_size;
1260
        }
1261
1262
1610
        ret = decode_slice(avctx, p, slice_height, slice_size, y_offset, table_size);
1263
1610
        emms_c();
1264
1610
        if (ret < 0)
1265
            return ret;
1266
    }
1267
1268
1610
    *got_frame = 1;
1269
1270
1610
    return (get_bits_count(&s->gb) + 31) / 32 * 4 + table_size;
1271
}
1272
1273
AVCodec ff_huffyuv_decoder = {
1274
    .name             = "huffyuv",
1275
    .long_name        = NULL_IF_CONFIG_SMALL("Huffyuv / HuffYUV"),
1276
    .type             = AVMEDIA_TYPE_VIDEO,
1277
    .id               = AV_CODEC_ID_HUFFYUV,
1278
    .priv_data_size   = sizeof(HYuvContext),
1279
    .init             = decode_init,
1280
    .close            = decode_end,
1281
    .decode           = decode_frame,
1282
    .capabilities     = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_DRAW_HORIZ_BAND |
1283
                        AV_CODEC_CAP_FRAME_THREADS,
1284
};
1285
1286
#if CONFIG_FFVHUFF_DECODER
1287
AVCodec ff_ffvhuff_decoder = {
1288
    .name             = "ffvhuff",
1289
    .long_name        = NULL_IF_CONFIG_SMALL("Huffyuv FFmpeg variant"),
1290
    .type             = AVMEDIA_TYPE_VIDEO,
1291
    .id               = AV_CODEC_ID_FFVHUFF,
1292
    .priv_data_size   = sizeof(HYuvContext),
1293
    .init             = decode_init,
1294
    .close            = decode_end,
1295
    .decode           = decode_frame,
1296
    .capabilities     = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_DRAW_HORIZ_BAND |
1297
                        AV_CODEC_CAP_FRAME_THREADS,
1298
};
1299
#endif /* CONFIG_FFVHUFF_DECODER */
1300
1301
#if CONFIG_HYMT_DECODER
1302
AVCodec ff_hymt_decoder = {
1303
    .name             = "hymt",
1304
    .long_name        = NULL_IF_CONFIG_SMALL("HuffYUV MT"),
1305
    .type             = AVMEDIA_TYPE_VIDEO,
1306
    .id               = AV_CODEC_ID_HYMT,
1307
    .priv_data_size   = sizeof(HYuvContext),
1308
    .init             = decode_init,
1309
    .close            = decode_end,
1310
    .decode           = decode_frame,
1311
    .capabilities     = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_DRAW_HORIZ_BAND |
1312
                        AV_CODEC_CAP_FRAME_THREADS,
1313
};
1314
#endif /* CONFIG_HYMT_DECODER */