GCC Code Coverage Report
Directory: ../../../ffmpeg/ Exec Total Coverage
File: src/libavcodec/dnxhddec.c Lines: 312 397 78.6 %
Date: 2020-04-02 05:41:20 Branches: 156 219 71.2 %

Line Branch Exec Source
1
/*
2
 * VC3/DNxHD decoder.
3
 * Copyright (c) 2007 SmartJog S.A., Baptiste Coudurier <baptiste dot coudurier at smartjog dot com>
4
 * Copyright (c) 2011 MirriAd Ltd
5
 * Copyright (c) 2015 Christophe Gisquet
6
 *
7
 * 10 bit support added by MirriAd Ltd, Joseph Artsimovich <joseph@mirriad.com>
8
 * Slice multithreading and MB interlaced support added by Christophe Gisquet
9
 *
10
 * This file is part of FFmpeg.
11
 *
12
 * FFmpeg is free software; you can redistribute it and/or
13
 * modify it under the terms of the GNU Lesser General Public
14
 * License as published by the Free Software Foundation; either
15
 * version 2.1 of the License, or (at your option) any later version.
16
 *
17
 * FFmpeg is distributed in the hope that it will be useful,
18
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
20
 * Lesser General Public License for more details.
21
 *
22
 * You should have received a copy of the GNU Lesser General Public
23
 * License along with FFmpeg; if not, write to the Free Software
24
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
25
 */
26
27
#include "libavutil/imgutils.h"
28
#include "avcodec.h"
29
#include "blockdsp.h"
30
#define  UNCHECKED_BITSTREAM_READER 1
31
#include "get_bits.h"
32
#include "dnxhddata.h"
33
#include "idctdsp.h"
34
#include "internal.h"
35
#include "profiles.h"
36
#include "thread.h"
37
38
typedef struct RowContext {
39
    DECLARE_ALIGNED(32, int16_t, blocks)[12][64];
40
    int luma_scale[64];
41
    int chroma_scale[64];
42
    GetBitContext gb;
43
    int last_dc[3];
44
    int last_qscale;
45
    int errors;
46
    /** -1:not set yet  0:off=RGB  1:on=YUV  2:variable */
47
    int format;
48
} RowContext;
49
50
typedef struct DNXHDContext {
51
    AVCodecContext *avctx;
52
    RowContext *rows;
53
    BlockDSPContext bdsp;
54
    const uint8_t* buf;
55
    int buf_size;
56
    int64_t cid;                        ///< compression id
57
    unsigned int width, height;
58
    enum AVPixelFormat pix_fmt;
59
    unsigned int mb_width, mb_height;
60
    uint32_t mb_scan_index[512];
61
    int data_offset;                    // End of mb_scan_index, where macroblocks start
62
    int cur_field;                      ///< current interlaced field
63
    VLC ac_vlc, dc_vlc, run_vlc;
64
    IDCTDSPContext idsp;
65
    ScanTable scantable;
66
    const CIDEntry *cid_table;
67
    int bit_depth; // 8, 10, 12 or 0 if not initialized at all.
68
    int is_444;
69
    int alpha;
70
    int lla;
71
    int mbaff;
72
    int act;
73
    int (*decode_dct_block)(const struct DNXHDContext *ctx,
74
                            RowContext *row, int n);
75
} DNXHDContext;
76
77
#define DNXHD_VLC_BITS 9
78
#define DNXHD_DC_VLC_BITS 7
79
80
static int dnxhd_decode_dct_block_8(const DNXHDContext *ctx,
81
                                    RowContext *row, int n);
82
static int dnxhd_decode_dct_block_10(const DNXHDContext *ctx,
83
                                     RowContext *row, int n);
84
static int dnxhd_decode_dct_block_10_444(const DNXHDContext *ctx,
85
                                         RowContext *row, int n);
86
static int dnxhd_decode_dct_block_12(const DNXHDContext *ctx,
87
                                     RowContext *row, int n);
88
static int dnxhd_decode_dct_block_12_444(const DNXHDContext *ctx,
89
                                         RowContext *row, int n);
90
91
149
static av_cold int dnxhd_decode_init(AVCodecContext *avctx)
92
{
93
149
    DNXHDContext *ctx = avctx->priv_data;
94
95
149
    ctx->avctx = avctx;
96
149
    ctx->cid = -1;
97
149
    if (avctx->colorspace == AVCOL_SPC_UNSPECIFIED) {
98
73
        avctx->colorspace = AVCOL_SPC_BT709;
99
    }
100
101
149
    avctx->coded_width  = FFALIGN(avctx->width,  16);
102
149
    avctx->coded_height = FFALIGN(avctx->height, 16);
103
104
149
    ctx->rows = av_mallocz_array(avctx->thread_count, sizeof(RowContext));
105
149
    if (!ctx->rows)
106
        return AVERROR(ENOMEM);
107
108
149
    return 0;
109
}
110
111
502
static int dnxhd_init_vlc(DNXHDContext *ctx, uint32_t cid, int bitdepth)
112
{
113
502
    if (cid != ctx->cid) {
114
        int index;
115
116
148
        if ((index = ff_dnxhd_get_cid_table(cid)) < 0) {
117
            av_log(ctx->avctx, AV_LOG_ERROR, "unsupported cid %"PRIu32"\n", cid);
118
            return AVERROR(ENOSYS);
119
        }
120
148
        if (ff_dnxhd_cid_table[index].bit_depth != bitdepth &&
121
4
            ff_dnxhd_cid_table[index].bit_depth != DNXHD_VARIABLE) {
122
            av_log(ctx->avctx, AV_LOG_ERROR, "bit depth mismatches %d %d\n", ff_dnxhd_cid_table[index].bit_depth, bitdepth);
123
            return AVERROR_INVALIDDATA;
124
        }
125
148
        ctx->cid_table = &ff_dnxhd_cid_table[index];
126
148
        av_log(ctx->avctx, AV_LOG_VERBOSE, "Profile cid %"PRIu32".\n", cid);
127
128
148
        ff_free_vlc(&ctx->ac_vlc);
129
148
        ff_free_vlc(&ctx->dc_vlc);
130
148
        ff_free_vlc(&ctx->run_vlc);
131
132
148
        init_vlc(&ctx->ac_vlc, DNXHD_VLC_BITS, 257,
133
                 ctx->cid_table->ac_bits, 1, 1,
134
                 ctx->cid_table->ac_codes, 2, 2, 0);
135
148
        init_vlc(&ctx->dc_vlc, DNXHD_DC_VLC_BITS, bitdepth > 8 ? 14 : 12,
136
                 ctx->cid_table->dc_bits, 1, 1,
137
                 ctx->cid_table->dc_codes, 1, 1, 0);
138
148
        init_vlc(&ctx->run_vlc, DNXHD_VLC_BITS, 62,
139
                 ctx->cid_table->run_bits, 1, 1,
140
                 ctx->cid_table->run_codes, 2, 2, 0);
141
142
148
        ctx->cid = cid;
143
    }
144
502
    return 0;
145
}
146
147
static av_cold int dnxhd_decode_init_thread_copy(AVCodecContext *avctx)
148
{
149
    DNXHDContext *ctx = avctx->priv_data;
150
151
    ctx->avctx = avctx;
152
    // make sure VLC tables will be loaded when cid is parsed
153
    ctx->cid = -1;
154
155
    ctx->rows = av_mallocz_array(avctx->thread_count, sizeof(RowContext));
156
    if (!ctx->rows)
157
        return AVERROR(ENOMEM);
158
159
    return 0;
160
}
161
162
502
static int dnxhd_get_profile(int cid)
163
{
164

502
    switch(cid) {
165
2
    case 1270:
166
2
        return FF_PROFILE_DNXHR_444;
167
2
    case 1271:
168
2
        return FF_PROFILE_DNXHR_HQX;
169
120
    case 1272:
170
120
        return FF_PROFILE_DNXHR_HQ;
171
48
    case 1273:
172
48
        return FF_PROFILE_DNXHR_SQ;
173
111
    case 1274:
174
111
        return FF_PROFILE_DNXHR_LB;
175
    }
176
219
    return FF_PROFILE_DNXHD;
177
}
178
179
502
static int dnxhd_decode_header(DNXHDContext *ctx, AVFrame *frame,
180
                               const uint8_t *buf, int buf_size,
181
                               int first_field)
182
{
183
    int i, cid, ret;
184
502
    int old_bit_depth = ctx->bit_depth, bitdepth;
185
    uint64_t header_prefix;
186
502
    if (buf_size < 0x280) {
187
        av_log(ctx->avctx, AV_LOG_ERROR,
188
               "buffer too small (%d < 640).\n", buf_size);
189
        return AVERROR_INVALIDDATA;
190
    }
191
192
502
    header_prefix = ff_dnxhd_parse_header_prefix(buf);
193
502
    if (header_prefix == 0) {
194
        av_log(ctx->avctx, AV_LOG_ERROR,
195
               "unknown header 0x%02X 0x%02X 0x%02X 0x%02X 0x%02X\n",
196
               buf[0], buf[1], buf[2], buf[3], buf[4]);
197
        return AVERROR_INVALIDDATA;
198
    }
199
502
    if (buf[5] & 2) { /* interlaced */
200
134
        ctx->cur_field = buf[5] & 1;
201
134
        frame->interlaced_frame = 1;
202
134
        frame->top_field_first  = first_field ^ ctx->cur_field;
203
134
        av_log(ctx->avctx, AV_LOG_DEBUG,
204
134
               "interlaced %d, cur field %d\n", buf[5] & 3, ctx->cur_field);
205
    } else {
206
368
        ctx->cur_field = 0;
207
    }
208
502
    ctx->mbaff = (buf[0x6] >> 5) & 1;
209
502
    ctx->alpha = buf[0x7] & 1;
210
502
    ctx->lla   = (buf[0x7] >> 1) & 1;
211
502
    if (ctx->alpha)
212
        avpriv_request_sample(ctx->avctx, "alpha");
213
214
502
    ctx->height = AV_RB16(buf + 0x18);
215
502
    ctx->width  = AV_RB16(buf + 0x1a);
216
217

502
    switch(buf[0x21] >> 5) {
218
432
    case 1: bitdepth = 8; break;
219
68
    case 2: bitdepth = 10; break;
220
2
    case 3: bitdepth = 12; break;
221
    default:
222
        av_log(ctx->avctx, AV_LOG_ERROR,
223
               "Unknown bitdepth indicator (%d)\n", buf[0x21] >> 5);
224
        return AVERROR_INVALIDDATA;
225
    }
226
227
502
    cid = AV_RB32(buf + 0x28);
228
229
502
    ctx->avctx->profile = dnxhd_get_profile(cid);
230
231
502
    if ((ret = dnxhd_init_vlc(ctx, cid, bitdepth)) < 0)
232
        return ret;
233

502
    if (ctx->mbaff && ctx->cid_table->cid != 1260)
234
        av_log(ctx->avctx, AV_LOG_WARNING,
235
               "Adaptive MB interlace flag in an unsupported profile.\n");
236
237

502
    switch ((buf[0x2C] >> 1) & 3) {
238
502
    case 0: frame->colorspace = AVCOL_SPC_BT709;       break;
239
    case 1: frame->colorspace = AVCOL_SPC_BT2020_NCL;  break;
240
    case 2: frame->colorspace = AVCOL_SPC_BT2020_CL;   break;
241
    case 3: frame->colorspace = AVCOL_SPC_UNSPECIFIED; break;
242
    }
243
244
502
    ctx->act = buf[0x2C] & 1;
245

502
    if (ctx->act && ctx->cid_table->cid != 1256 && ctx->cid_table->cid != 1270)
246
        av_log(ctx->avctx, AV_LOG_WARNING,
247
               "Adaptive color transform in an unsupported profile.\n");
248
249
502
    ctx->is_444 = (buf[0x2C] >> 6) & 1;
250
502
    if (ctx->is_444) {
251
2
        if (bitdepth == 8) {
252
            avpriv_request_sample(ctx->avctx, "4:4:4 8 bits");
253
            return AVERROR_INVALIDDATA;
254
2
        } else if (bitdepth == 10) {
255
2
            ctx->decode_dct_block = dnxhd_decode_dct_block_10_444;
256
2
            ctx->pix_fmt = ctx->act ? AV_PIX_FMT_YUV444P10
257
2
                                    : AV_PIX_FMT_GBRP10;
258
        } else {
259
            ctx->decode_dct_block = dnxhd_decode_dct_block_12_444;
260
            ctx->pix_fmt = ctx->act ? AV_PIX_FMT_YUV444P12
261
                                    : AV_PIX_FMT_GBRP12;
262
        }
263
500
    } else if (bitdepth == 12) {
264
2
        ctx->decode_dct_block = dnxhd_decode_dct_block_12;
265
2
        ctx->pix_fmt = AV_PIX_FMT_YUV422P12;
266
498
    } else if (bitdepth == 10) {
267
66
        if (ctx->avctx->profile == FF_PROFILE_DNXHR_HQX)
268
            ctx->decode_dct_block = dnxhd_decode_dct_block_10_444;
269
        else
270
66
            ctx->decode_dct_block = dnxhd_decode_dct_block_10;
271
66
        ctx->pix_fmt = AV_PIX_FMT_YUV422P10;
272
    } else {
273
432
        ctx->decode_dct_block = dnxhd_decode_dct_block_8;
274
432
        ctx->pix_fmt = AV_PIX_FMT_YUV422P;
275
    }
276
277
502
    ctx->avctx->bits_per_raw_sample = ctx->bit_depth = bitdepth;
278
502
    if (ctx->bit_depth != old_bit_depth) {
279
148
        ff_blockdsp_init(&ctx->bdsp, ctx->avctx);
280
148
        ff_idctdsp_init(&ctx->idsp, ctx->avctx);
281
148
        ff_init_scantable(ctx->idsp.idct_permutation, &ctx->scantable,
282
                          ff_zigzag_direct);
283
    }
284
285
    // make sure profile size constraints are respected
286
    // DNx100 allows 1920->1440 and 1280->960 subsampling
287
502
    if (ctx->width != ctx->cid_table->width &&
288
285
        ctx->cid_table->width != DNXHD_VARIABLE) {
289
2
        av_reduce(&ctx->avctx->sample_aspect_ratio.num,
290
2
                  &ctx->avctx->sample_aspect_ratio.den,
291
2
                  ctx->width, ctx->cid_table->width, 255);
292
2
        ctx->width = ctx->cid_table->width;
293
    }
294
295
502
    if (buf_size < ctx->cid_table->coding_unit_size) {
296
        av_log(ctx->avctx, AV_LOG_ERROR, "incorrect frame size (%d < %u).\n",
297
               buf_size, ctx->cid_table->coding_unit_size);
298
        return AVERROR_INVALIDDATA;
299
    }
300
301
502
    ctx->mb_width  = (ctx->width + 15)>> 4;
302
502
    ctx->mb_height = AV_RB16(buf + 0x16c);
303
304

502
    if ((ctx->height + 15) >> 4 == ctx->mb_height && frame->interlaced_frame)
305
134
        ctx->height <<= 1;
306
307
502
    av_log(ctx->avctx, AV_LOG_VERBOSE, "%dx%d, 4:%s %d bits, MBAFF=%d ACT=%d\n",
308
502
           ctx->width, ctx->height, ctx->is_444 ? "4:4" : "2:2",
309
           ctx->bit_depth, ctx->mbaff, ctx->act);
310
311
    // Newer format supports variable mb_scan_index sizes
312

502
    if (ctx->mb_height > 68 && ff_dnxhd_check_header_prefix_hr(header_prefix)) {
313
108
        ctx->data_offset = 0x170 + (ctx->mb_height << 2);
314
    } else {
315
394
        if (ctx->mb_height > 68) {
316
            av_log(ctx->avctx, AV_LOG_ERROR,
317
                   "mb height too big: %d\n", ctx->mb_height);
318
            return AVERROR_INVALIDDATA;
319
        }
320
394
        ctx->data_offset = 0x280;
321
    }
322
502
    if ((ctx->mb_height << frame->interlaced_frame) > (ctx->height + 15) >> 4) {
323
        av_log(ctx->avctx, AV_LOG_ERROR,
324
                "mb height too big: %d\n", ctx->mb_height);
325
        return AVERROR_INVALIDDATA;
326
    }
327
328
502
    if (buf_size < ctx->data_offset) {
329
        av_log(ctx->avctx, AV_LOG_ERROR,
330
               "buffer too small (%d < %d).\n", buf_size, ctx->data_offset);
331
        return AVERROR_INVALIDDATA;
332
    }
333
334
502
    if (ctx->mb_height > FF_ARRAY_ELEMS(ctx->mb_scan_index)) {
335
        av_log(ctx->avctx, AV_LOG_ERROR,
336
               "mb_height too big (%d > %"SIZE_SPECIFIER").\n", ctx->mb_height, FF_ARRAY_ELEMS(ctx->mb_scan_index));
337
        return AVERROR_INVALIDDATA;
338
    }
339
340
30675
    for (i = 0; i < ctx->mb_height; i++) {
341
30173
        ctx->mb_scan_index[i] = AV_RB32(buf + 0x170 + (i << 2));
342
        ff_dlog(ctx->avctx, "mb scan index %d, pos %d: %"PRIu32"\n",
343
                i, 0x170 + (i << 2), ctx->mb_scan_index[i]);
344
30173
        if (buf_size - ctx->data_offset < ctx->mb_scan_index[i]) {
345
            av_log(ctx->avctx, AV_LOG_ERROR,
346
                   "invalid mb scan index (%"PRIu32" vs %u).\n",
347
                   ctx->mb_scan_index[i], buf_size - ctx->data_offset);
348
            return AVERROR_INVALIDDATA;
349
        }
350
    }
351
352
502
    return 0;
353
}
354
355
34743936
static av_always_inline int dnxhd_decode_dct_block(const DNXHDContext *ctx,
356
                                                   RowContext *row,
357
                                                   int n,
358
                                                   int index_bits,
359
                                                   int level_bias,
360
                                                   int level_shift,
361
                                                   int dc_shift)
362
{
363
    int i, j, index1, index2, len, flags;
364
    int level, component, sign;
365
    const int *scale;
366
    const uint8_t *weight_matrix;
367
34743936
    const uint8_t *ac_info = ctx->cid_table->ac_info;
368
34743936
    int16_t *block = row->blocks[n];
369
34743936
    const int eob_index     = ctx->cid_table->eob_index;
370
34743936
    int ret = 0;
371
34743936
    OPEN_READER(bs, &row->gb);
372
373
34743936
    ctx->bdsp.clear_block(block);
374
375
34743936
    if (!ctx->is_444) {
376
34591296
        if (n & 2) {
377
17295648
            component     = 1 + (n & 1);
378
17295648
            scale = row->chroma_scale;
379
17295648
            weight_matrix = ctx->cid_table->chroma_weight;
380
        } else {
381
17295648
            component     = 0;
382
17295648
            scale = row->luma_scale;
383
17295648
            weight_matrix = ctx->cid_table->luma_weight;
384
        }
385
    } else {
386
152640
        component = (n >> 1) % 3;
387
152640
        if (component) {
388
101760
            scale = row->chroma_scale;
389
101760
            weight_matrix = ctx->cid_table->chroma_weight;
390
        } else {
391
50880
            scale = row->luma_scale;
392
50880
            weight_matrix = ctx->cid_table->luma_weight;
393
        }
394
    }
395
396
34743936
    UPDATE_CACHE(bs, &row->gb);
397
34743936
    GET_VLC(len, bs, &row->gb, ctx->dc_vlc.table, DNXHD_DC_VLC_BITS, 1);
398
34743936
    if (len < 0) {
399
        ret = len;
400
        goto error;
401
    }
402
34743936
    if (len) {
403
32365764
        level = GET_CACHE(bs, &row->gb);
404
32365764
        LAST_SKIP_BITS(bs, &row->gb, len);
405
32365764
        sign  = ~level >> 31;
406
32365764
        level = (NEG_USR32(sign ^ level, len) ^ sign) - sign;
407
32365764
        row->last_dc[component] += level * (1 << dc_shift);
408
    }
409
34743936
    block[0] = row->last_dc[component];
410
411
34743936
    i = 0;
412
413
34743936
    UPDATE_CACHE(bs, &row->gb);
414
34743936
    GET_VLC(index1, bs, &row->gb, ctx->ac_vlc.table,
415
            DNXHD_VLC_BITS, 2);
416
417
176938926
    while (index1 != eob_index) {
418
142194990
        level = ac_info[2*index1+0];
419
142194990
        flags = ac_info[2*index1+1];
420
421
142194990
        sign = SHOW_SBITS(bs, &row->gb, 1);
422
142194990
        SKIP_BITS(bs, &row->gb, 1);
423
424
142194990
        if (flags & 1) {
425
2609257
            level += SHOW_UBITS(bs, &row->gb, index_bits) << 7;
426
2609257
            SKIP_BITS(bs, &row->gb, index_bits);
427
        }
428
429
142194990
        if (flags & 2) {
430
46521250
            UPDATE_CACHE(bs, &row->gb);
431
46521250
            GET_VLC(index2, bs, &row->gb, ctx->run_vlc.table,
432
                    DNXHD_VLC_BITS, 2);
433
46521250
            i += ctx->cid_table->run[index2];
434
        }
435
436
142194990
        if (++i > 63) {
437
            av_log(ctx->avctx, AV_LOG_ERROR, "ac tex damaged %d, %d\n", n, i);
438
            ret = -1;
439
            break;
440
        }
441
442
142194990
        j     = ctx->scantable.permutated[i];
443
142194990
        level *= scale[i];
444
142194990
        level += scale[i] >> 1;
445

142194990
        if (level_bias < 32 || weight_matrix[i] != level_bias)
446
117255903
            level += level_bias; // 1<<(level_shift-1)
447
142194990
        level >>= level_shift;
448
449
142194990
        block[j] = (level ^ sign) - sign;
450
451
142194990
        UPDATE_CACHE(bs, &row->gb);
452
142194990
        GET_VLC(index1, bs, &row->gb, ctx->ac_vlc.table,
453
                DNXHD_VLC_BITS, 2);
454
    }
455
34743936
error:
456
34743936
    CLOSE_READER(bs, &row->gb);
457
34743936
    return ret;
458
}
459
460
32375616
static int dnxhd_decode_dct_block_8(const DNXHDContext *ctx,
461
                                    RowContext *row, int n)
462
{
463
32375616
    return dnxhd_decode_dct_block(ctx, row, n, 4, 32, 6, 0);
464
}
465
466
2085120
static int dnxhd_decode_dct_block_10(const DNXHDContext *ctx,
467
                                     RowContext *row, int n)
468
{
469
2085120
    return dnxhd_decode_dct_block(ctx, row, n, 6, 8, 4, 0);
470
}
471
472
152640
static int dnxhd_decode_dct_block_10_444(const DNXHDContext *ctx,
473
                                         RowContext *row, int n)
474
{
475
152640
    return dnxhd_decode_dct_block(ctx, row, n, 6, 32, 6, 0);
476
}
477
478
130560
static int dnxhd_decode_dct_block_12(const DNXHDContext *ctx,
479
                                     RowContext *row, int n)
480
{
481
130560
    return dnxhd_decode_dct_block(ctx, row, n, 6, 8, 4, 2);
482
}
483
484
static int dnxhd_decode_dct_block_12_444(const DNXHDContext *ctx,
485
                                         RowContext *row, int n)
486
{
487
    return dnxhd_decode_dct_block(ctx, row, n, 6, 32, 4, 2);
488
}
489
490
4336632
static int dnxhd_decode_macroblock(const DNXHDContext *ctx, RowContext *row,
491
                                   AVFrame *frame, int x, int y)
492
{
493
4336632
    int shift1 = ctx->bit_depth >= 10;
494
4336632
    int dct_linesize_luma   = frame->linesize[0];
495
4336632
    int dct_linesize_chroma = frame->linesize[1];
496
    uint8_t *dest_y, *dest_u, *dest_v;
497
    int dct_y_offset, dct_x_offset;
498
    int qscale, i, act;
499
4336632
    int interlaced_mb = 0;
500
501
4336632
    if (ctx->mbaff) {
502
12240
        interlaced_mb = get_bits1(&row->gb);
503
12240
        qscale = get_bits(&row->gb, 10);
504
    } else {
505
4324392
        qscale = get_bits(&row->gb, 11);
506
    }
507
4336632
    act = get_bits1(&row->gb);
508
4336632
    if (act) {
509
12720
        if (!ctx->act) {
510
            static int act_warned;
511
            if (!act_warned) {
512
                act_warned = 1;
513
                av_log(ctx->avctx, AV_LOG_ERROR,
514
                       "ACT flag set, in violation of frame header.\n");
515
            }
516
12720
        } else if (row->format == -1) {
517
2
            row->format = act;
518
12718
        } else if (row->format != act) {
519
            row->format = 2; // Variable
520
        }
521
    }
522
523
4336632
    if (qscale != row->last_qscale) {
524
23037300
        for (i = 0; i < 64; i++) {
525
22682880
            row->luma_scale[i]   = qscale * ctx->cid_table->luma_weight[i];
526
22682880
            row->chroma_scale[i] = qscale * ctx->cid_table->chroma_weight[i];
527
        }
528
354420
        row->last_qscale = qscale;
529
    }
530
531
39080568
    for (i = 0; i < 8 + 4 * ctx->is_444; i++) {
532
34743936
        if (ctx->decode_dct_block(ctx, row, i) < 0)
533
            return AVERROR_INVALIDDATA;
534
    }
535
536
4336632
    if (frame->interlaced_frame) {
537
546720
        dct_linesize_luma   <<= 1;
538
546720
        dct_linesize_chroma <<= 1;
539
    }
540
541
4336632
    dest_y = frame->data[0] + ((y * dct_linesize_luma)   << 4) + (x << (4 + shift1));
542
4336632
    dest_u = frame->data[1] + ((y * dct_linesize_chroma) << 4) + (x << (3 + shift1 + ctx->is_444));
543
4336632
    dest_v = frame->data[2] + ((y * dct_linesize_chroma) << 4) + (x << (3 + shift1 + ctx->is_444));
544
545

4336632
    if (frame->interlaced_frame && ctx->cur_field) {
546
273360
        dest_y += frame->linesize[0];
547
273360
        dest_u += frame->linesize[1];
548
273360
        dest_v += frame->linesize[2];
549
    }
550
4336632
    if (interlaced_mb) {
551
3224
        dct_linesize_luma   <<= 1;
552
3224
        dct_linesize_chroma <<= 1;
553
    }
554
555
4336632
    dct_y_offset = interlaced_mb ? frame->linesize[0] : (dct_linesize_luma << 3);
556
4336632
    dct_x_offset = 8 << shift1;
557
4336632
    if (!ctx->is_444) {
558
4323912
        ctx->idsp.idct_put(dest_y,                               dct_linesize_luma, row->blocks[0]);
559
4323912
        ctx->idsp.idct_put(dest_y + dct_x_offset,                dct_linesize_luma, row->blocks[1]);
560
4323912
        ctx->idsp.idct_put(dest_y + dct_y_offset,                dct_linesize_luma, row->blocks[4]);
561
4323912
        ctx->idsp.idct_put(dest_y + dct_y_offset + dct_x_offset, dct_linesize_luma, row->blocks[5]);
562
563
4323912
        if (!(ctx->avctx->flags & AV_CODEC_FLAG_GRAY)) {
564
4323912
            dct_y_offset = interlaced_mb ? frame->linesize[1] : (dct_linesize_chroma << 3);
565
4323912
            ctx->idsp.idct_put(dest_u,                dct_linesize_chroma, row->blocks[2]);
566
4323912
            ctx->idsp.idct_put(dest_v,                dct_linesize_chroma, row->blocks[3]);
567
4323912
            ctx->idsp.idct_put(dest_u + dct_y_offset, dct_linesize_chroma, row->blocks[6]);
568
4323912
            ctx->idsp.idct_put(dest_v + dct_y_offset, dct_linesize_chroma, row->blocks[7]);
569
        }
570
    } else {
571
12720
        ctx->idsp.idct_put(dest_y,                               dct_linesize_luma, row->blocks[0]);
572
12720
        ctx->idsp.idct_put(dest_y + dct_x_offset,                dct_linesize_luma, row->blocks[1]);
573
12720
        ctx->idsp.idct_put(dest_y + dct_y_offset,                dct_linesize_luma, row->blocks[6]);
574
12720
        ctx->idsp.idct_put(dest_y + dct_y_offset + dct_x_offset, dct_linesize_luma, row->blocks[7]);
575
576
12720
        if (!(ctx->avctx->flags & AV_CODEC_FLAG_GRAY)) {
577
12720
            dct_y_offset = interlaced_mb ? frame->linesize[1] : (dct_linesize_chroma << 3);
578
12720
            ctx->idsp.idct_put(dest_u,                               dct_linesize_chroma, row->blocks[2]);
579
12720
            ctx->idsp.idct_put(dest_u + dct_x_offset,                dct_linesize_chroma, row->blocks[3]);
580
12720
            ctx->idsp.idct_put(dest_u + dct_y_offset,                dct_linesize_chroma, row->blocks[8]);
581
12720
            ctx->idsp.idct_put(dest_u + dct_y_offset + dct_x_offset, dct_linesize_chroma, row->blocks[9]);
582
12720
            ctx->idsp.idct_put(dest_v,                               dct_linesize_chroma, row->blocks[4]);
583
12720
            ctx->idsp.idct_put(dest_v + dct_x_offset,                dct_linesize_chroma, row->blocks[5]);
584
12720
            ctx->idsp.idct_put(dest_v + dct_y_offset,                dct_linesize_chroma, row->blocks[10]);
585
12720
            ctx->idsp.idct_put(dest_v + dct_y_offset + dct_x_offset, dct_linesize_chroma, row->blocks[11]);
586
        }
587
    }
588
589
4336632
    return 0;
590
}
591
592
30173
static int dnxhd_decode_row(AVCodecContext *avctx, void *data,
593
                            int rownb, int threadnb)
594
{
595
30173
    const DNXHDContext *ctx = avctx->priv_data;
596
30173
    uint32_t offset = ctx->mb_scan_index[rownb];
597
30173
    RowContext *row = ctx->rows + threadnb;
598
    int x, ret;
599
600
30173
    row->last_dc[0] =
601
30173
    row->last_dc[1] =
602
30173
    row->last_dc[2] = 1 << (ctx->bit_depth + 2); // for levels +2^(bitdepth-1)
603
30173
    ret = init_get_bits8(&row->gb, ctx->buf + offset, ctx->buf_size - offset);
604
30173
    if (ret < 0) {
605
        row->errors++;
606
        return ret;
607
    }
608
4366805
    for (x = 0; x < ctx->mb_width; x++) {
609
4336632
        int ret = dnxhd_decode_macroblock(ctx, row, data, x, rownb);
610
4336632
        if (ret < 0) {
611
            row->errors++;
612
            return ret;
613
        }
614
    }
615
616
30173
    return 0;
617
}
618
619
435
static int dnxhd_decode_frame(AVCodecContext *avctx, void *data,
620
                              int *got_frame, AVPacket *avpkt)
621
{
622
435
    const uint8_t *buf = avpkt->data;
623
435
    int buf_size = avpkt->size;
624
435
    DNXHDContext *ctx = avctx->priv_data;
625
435
    ThreadFrame frame = { .f = data };
626
435
    AVFrame *picture = data;
627
435
    int first_field = 1;
628
    int ret, i;
629
630
    ff_dlog(avctx, "frame size %d\n", buf_size);
631
632
870
    for (i = 0; i < avctx->thread_count; i++)
633
435
        ctx->rows[i].format = -1;
634
635
435
decode_coding_unit:
636
502
    if ((ret = dnxhd_decode_header(ctx, picture, buf, buf_size, first_field)) < 0)
637
        return ret;
638
639

502
    if ((avctx->width || avctx->height) &&
640

456
        (ctx->width != avctx->width || ctx->height != avctx->height)) {
641
2
        av_log(avctx, AV_LOG_WARNING, "frame size changed: %dx%d -> %ux%u\n",
642
               avctx->width, avctx->height, ctx->width, ctx->height);
643
2
        first_field = 1;
644
    }
645

502
    if (avctx->pix_fmt != AV_PIX_FMT_NONE && avctx->pix_fmt != ctx->pix_fmt) {
646
        av_log(avctx, AV_LOG_WARNING, "pix_fmt changed: %s -> %s\n",
647
               av_get_pix_fmt_name(avctx->pix_fmt), av_get_pix_fmt_name(ctx->pix_fmt));
648
        first_field = 1;
649
    }
650
651
502
    avctx->pix_fmt = ctx->pix_fmt;
652
502
    ret = ff_set_dimensions(avctx, ctx->width, ctx->height);
653
502
    if (ret < 0)
654
        return ret;
655
656
502
    if (first_field) {
657
435
        if ((ret = ff_thread_get_buffer(avctx, &frame, 0)) < 0)
658
            return ret;
659
435
        picture->pict_type = AV_PICTURE_TYPE_I;
660
435
        picture->key_frame = 1;
661
    }
662
663
502
    ctx->buf_size = buf_size - ctx->data_offset;
664
502
    ctx->buf = buf + ctx->data_offset;
665
502
    avctx->execute2(avctx, dnxhd_decode_row, picture, NULL, ctx->mb_height);
666
667

502
    if (first_field && picture->interlaced_frame) {
668
67
        buf      += ctx->cid_table->coding_unit_size;
669
67
        buf_size -= ctx->cid_table->coding_unit_size;
670
67
        first_field = 0;
671
67
        goto decode_coding_unit;
672
    }
673
674
435
    ret = 0;
675
870
    for (i = 0; i < avctx->thread_count; i++) {
676
435
        ret += ctx->rows[i].errors;
677
435
        ctx->rows[i].errors = 0;
678
    }
679
680
435
    if (ctx->act) {
681
        static int act_warned;
682
2
        int format = ctx->rows[0].format;
683
2
        for (i = 1; i < avctx->thread_count; i++) {
684
            if (ctx->rows[i].format != format &&
685
                ctx->rows[i].format != -1 /* not run */) {
686
                format = 2;
687
                break;
688
            }
689
        }
690

2
        switch (format) {
691
        case -1:
692
        case 2:
693
            if (!act_warned) {
694
                act_warned = 1;
695
                av_log(ctx->avctx, AV_LOG_ERROR,
696
                       "Unsupported: variable ACT flag.\n");
697
            }
698
            break;
699
        case 0:
700
            ctx->pix_fmt = ctx->bit_depth==10
701
                         ? AV_PIX_FMT_GBRP10 : AV_PIX_FMT_GBRP12;
702
            break;
703
2
        case 1:
704
4
            ctx->pix_fmt = ctx->bit_depth==10
705
2
                         ? AV_PIX_FMT_YUV444P10 : AV_PIX_FMT_YUV444P12;
706
2
            break;
707
        }
708
433
    }
709
435
    avctx->pix_fmt = ctx->pix_fmt;
710
435
    if (ret) {
711
        av_log(ctx->avctx, AV_LOG_ERROR, "%d lines with errors\n", ret);
712
        return AVERROR_INVALIDDATA;
713
    }
714
715
435
    *got_frame = 1;
716
435
    return avpkt->size;
717
}
718
719
149
static av_cold int dnxhd_decode_close(AVCodecContext *avctx)
720
{
721
149
    DNXHDContext *ctx = avctx->priv_data;
722
723
149
    ff_free_vlc(&ctx->ac_vlc);
724
149
    ff_free_vlc(&ctx->dc_vlc);
725
149
    ff_free_vlc(&ctx->run_vlc);
726
727
149
    av_freep(&ctx->rows);
728
729
149
    return 0;
730
}
731
732
AVCodec ff_dnxhd_decoder = {
733
    .name           = "dnxhd",
734
    .long_name      = NULL_IF_CONFIG_SMALL("VC3/DNxHD"),
735
    .type           = AVMEDIA_TYPE_VIDEO,
736
    .id             = AV_CODEC_ID_DNXHD,
737
    .priv_data_size = sizeof(DNXHDContext),
738
    .init           = dnxhd_decode_init,
739
    .close          = dnxhd_decode_close,
740
    .decode         = dnxhd_decode_frame,
741
    .capabilities   = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_FRAME_THREADS |
742
                      AV_CODEC_CAP_SLICE_THREADS,
743
    .init_thread_copy = ONLY_IF_THREADS_ENABLED(dnxhd_decode_init_thread_copy),
744
    .profiles       = NULL_IF_CONFIG_SMALL(ff_dnxhd_profiles),
745
};