GCC Code Coverage Report
Directory: ../../../ffmpeg/ Exec Total Coverage
File: src/libavcodec/dnxhddec.c Lines: 313 390 80.3 %
Date: 2021-04-19 06:27:07 Branches: 156 217 71.9 %

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 "libavutil/mem_internal.h"
29
30
#include "avcodec.h"
31
#include "blockdsp.h"
32
#define  UNCHECKED_BITSTREAM_READER 1
33
#include "get_bits.h"
34
#include "dnxhddata.h"
35
#include "idctdsp.h"
36
#include "internal.h"
37
#include "profiles.h"
38
#include "thread.h"
39
40
typedef struct RowContext {
41
    DECLARE_ALIGNED(32, int16_t, blocks)[12][64];
42
    int luma_scale[64];
43
    int chroma_scale[64];
44
    GetBitContext gb;
45
    int last_dc[3];
46
    int last_qscale;
47
    int errors;
48
    /** -1:not set yet  0:off=RGB  1:on=YUV  2:variable */
49
    int format;
50
} RowContext;
51
52
typedef struct DNXHDContext {
53
    AVCodecContext *avctx;
54
    RowContext *rows;
55
    BlockDSPContext bdsp;
56
    const uint8_t* buf;
57
    int buf_size;
58
    int64_t cid;                        ///< compression id
59
    unsigned int width, height;
60
    enum AVPixelFormat pix_fmt;
61
    unsigned int mb_width, mb_height;
62
    uint32_t mb_scan_index[512];
63
    int data_offset;                    // End of mb_scan_index, where macroblocks start
64
    int cur_field;                      ///< current interlaced field
65
    VLC ac_vlc, dc_vlc, run_vlc;
66
    IDCTDSPContext idsp;
67
    ScanTable scantable;
68
    const CIDEntry *cid_table;
69
    int bit_depth; // 8, 10, 12 or 0 if not initialized at all.
70
    int is_444;
71
    int alpha;
72
    int lla;
73
    int mbaff;
74
    int act;
75
    int (*decode_dct_block)(const struct DNXHDContext *ctx,
76
                            RowContext *row, int n);
77
} DNXHDContext;
78
79
#define DNXHD_VLC_BITS 9
80
#define DNXHD_DC_VLC_BITS 7
81
82
static int dnxhd_decode_dct_block_8(const DNXHDContext *ctx,
83
                                    RowContext *row, int n);
84
static int dnxhd_decode_dct_block_10(const DNXHDContext *ctx,
85
                                     RowContext *row, int n);
86
static int dnxhd_decode_dct_block_10_444(const DNXHDContext *ctx,
87
                                         RowContext *row, int n);
88
static int dnxhd_decode_dct_block_12(const DNXHDContext *ctx,
89
                                     RowContext *row, int n);
90
static int dnxhd_decode_dct_block_12_444(const DNXHDContext *ctx,
91
                                         RowContext *row, int n);
92
93
149
static av_cold int dnxhd_decode_init(AVCodecContext *avctx)
94
{
95
149
    DNXHDContext *ctx = avctx->priv_data;
96
97
149
    ctx->avctx = avctx;
98
149
    ctx->cid = -1;
99
149
    if (avctx->colorspace == AVCOL_SPC_UNSPECIFIED) {
100
74
        avctx->colorspace = AVCOL_SPC_BT709;
101
    }
102
103
149
    avctx->coded_width  = FFALIGN(avctx->width,  16);
104
149
    avctx->coded_height = FFALIGN(avctx->height, 16);
105
106
149
    ctx->rows = av_mallocz_array(avctx->thread_count, sizeof(RowContext));
107
149
    if (!ctx->rows)
108
        return AVERROR(ENOMEM);
109
110
149
    return 0;
111
}
112
113
502
static int dnxhd_init_vlc(DNXHDContext *ctx, uint32_t cid, int bitdepth)
114
{
115
502
    if (cid != ctx->cid) {
116
148
        const CIDEntry *cid_table = ff_dnxhd_get_cid_table(cid);
117
118
148
        if (!cid_table) {
119
            av_log(ctx->avctx, AV_LOG_ERROR, "unsupported cid %"PRIu32"\n", cid);
120
            return AVERROR(ENOSYS);
121
        }
122
148
        if (cid_table->bit_depth != bitdepth &&
123
4
            cid_table->bit_depth != DNXHD_VARIABLE) {
124
            av_log(ctx->avctx, AV_LOG_ERROR, "bit depth mismatches %d %d\n",
125
                   cid_table->bit_depth, bitdepth);
126
            return AVERROR_INVALIDDATA;
127
        }
128
148
        ctx->cid_table = cid_table;
129
148
        av_log(ctx->avctx, AV_LOG_VERBOSE, "Profile cid %"PRIu32".\n", cid);
130
131
148
        ff_free_vlc(&ctx->ac_vlc);
132
148
        ff_free_vlc(&ctx->dc_vlc);
133
148
        ff_free_vlc(&ctx->run_vlc);
134
135
148
        init_vlc(&ctx->ac_vlc, DNXHD_VLC_BITS, 257,
136
                 ctx->cid_table->ac_bits, 1, 1,
137
                 ctx->cid_table->ac_codes, 2, 2, 0);
138
148
        init_vlc(&ctx->dc_vlc, DNXHD_DC_VLC_BITS, bitdepth > 8 ? 14 : 12,
139
                 ctx->cid_table->dc_bits, 1, 1,
140
                 ctx->cid_table->dc_codes, 1, 1, 0);
141
148
        init_vlc(&ctx->run_vlc, DNXHD_VLC_BITS, 62,
142
                 ctx->cid_table->run_bits, 1, 1,
143
                 ctx->cid_table->run_codes, 2, 2, 0);
144
145
148
        ctx->cid = cid;
146
    }
147
502
    return 0;
148
}
149
150
502
static int dnxhd_get_profile(int cid)
151
{
152

502
    switch(cid) {
153
2
    case 1270:
154
2
        return FF_PROFILE_DNXHR_444;
155
2
    case 1271:
156
2
        return FF_PROFILE_DNXHR_HQX;
157
120
    case 1272:
158
120
        return FF_PROFILE_DNXHR_HQ;
159
48
    case 1273:
160
48
        return FF_PROFILE_DNXHR_SQ;
161
111
    case 1274:
162
111
        return FF_PROFILE_DNXHR_LB;
163
    }
164
219
    return FF_PROFILE_DNXHD;
165
}
166
167
502
static int dnxhd_decode_header(DNXHDContext *ctx, AVFrame *frame,
168
                               const uint8_t *buf, int buf_size,
169
                               int first_field)
170
{
171
    int i, cid, ret;
172
502
    int old_bit_depth = ctx->bit_depth, bitdepth;
173
    uint64_t header_prefix;
174
502
    if (buf_size < 0x280) {
175
        av_log(ctx->avctx, AV_LOG_ERROR,
176
               "buffer too small (%d < 640).\n", buf_size);
177
        return AVERROR_INVALIDDATA;
178
    }
179
180
502
    header_prefix = ff_dnxhd_parse_header_prefix(buf);
181
502
    if (header_prefix == 0) {
182
        av_log(ctx->avctx, AV_LOG_ERROR,
183
               "unknown header 0x%02X 0x%02X 0x%02X 0x%02X 0x%02X\n",
184
               buf[0], buf[1], buf[2], buf[3], buf[4]);
185
        return AVERROR_INVALIDDATA;
186
    }
187
502
    if (buf[5] & 2) { /* interlaced */
188
134
        ctx->cur_field = buf[5] & 1;
189
134
        frame->interlaced_frame = 1;
190
134
        frame->top_field_first  = first_field ^ ctx->cur_field;
191
134
        av_log(ctx->avctx, AV_LOG_DEBUG,
192
134
               "interlaced %d, cur field %d\n", buf[5] & 3, ctx->cur_field);
193
    } else {
194
368
        ctx->cur_field = 0;
195
    }
196
502
    ctx->mbaff = (buf[0x6] >> 5) & 1;
197
502
    ctx->alpha = buf[0x7] & 1;
198
502
    ctx->lla   = (buf[0x7] >> 1) & 1;
199
502
    if (ctx->alpha)
200
        avpriv_request_sample(ctx->avctx, "alpha");
201
202
502
    ctx->height = AV_RB16(buf + 0x18);
203
502
    ctx->width  = AV_RB16(buf + 0x1a);
204
205

502
    switch(buf[0x21] >> 5) {
206
432
    case 1: bitdepth = 8; break;
207
68
    case 2: bitdepth = 10; break;
208
2
    case 3: bitdepth = 12; break;
209
    default:
210
        av_log(ctx->avctx, AV_LOG_ERROR,
211
               "Unknown bitdepth indicator (%d)\n", buf[0x21] >> 5);
212
        return AVERROR_INVALIDDATA;
213
    }
214
215
502
    cid = AV_RB32(buf + 0x28);
216
217
502
    ctx->avctx->profile = dnxhd_get_profile(cid);
218
219
502
    if ((ret = dnxhd_init_vlc(ctx, cid, bitdepth)) < 0)
220
        return ret;
221

502
    if (ctx->mbaff && ctx->cid_table->cid != 1260)
222
        av_log(ctx->avctx, AV_LOG_WARNING,
223
               "Adaptive MB interlace flag in an unsupported profile.\n");
224
225

502
    switch ((buf[0x2C] >> 1) & 3) {
226
502
    case 0: frame->colorspace = AVCOL_SPC_BT709;       break;
227
    case 1: frame->colorspace = AVCOL_SPC_BT2020_NCL;  break;
228
    case 2: frame->colorspace = AVCOL_SPC_BT2020_CL;   break;
229
    case 3: frame->colorspace = AVCOL_SPC_UNSPECIFIED; break;
230
    }
231
232
502
    ctx->act = buf[0x2C] & 1;
233

502
    if (ctx->act && ctx->cid_table->cid != 1256 && ctx->cid_table->cid != 1270)
234
        av_log(ctx->avctx, AV_LOG_WARNING,
235
               "Adaptive color transform in an unsupported profile.\n");
236
237
502
    ctx->is_444 = (buf[0x2C] >> 6) & 1;
238
502
    if (ctx->is_444) {
239
2
        if (bitdepth == 8) {
240
            avpriv_request_sample(ctx->avctx, "4:4:4 8 bits");
241
            return AVERROR_INVALIDDATA;
242
2
        } else if (bitdepth == 10) {
243
2
            ctx->decode_dct_block = dnxhd_decode_dct_block_10_444;
244
2
            ctx->pix_fmt = ctx->act ? AV_PIX_FMT_YUV444P10
245
2
                                    : AV_PIX_FMT_GBRP10;
246
        } else {
247
            ctx->decode_dct_block = dnxhd_decode_dct_block_12_444;
248
            ctx->pix_fmt = ctx->act ? AV_PIX_FMT_YUV444P12
249
                                    : AV_PIX_FMT_GBRP12;
250
        }
251
500
    } else if (bitdepth == 12) {
252
2
        ctx->decode_dct_block = dnxhd_decode_dct_block_12;
253
2
        ctx->pix_fmt = AV_PIX_FMT_YUV422P12;
254
498
    } else if (bitdepth == 10) {
255
66
        if (ctx->avctx->profile == FF_PROFILE_DNXHR_HQX)
256
            ctx->decode_dct_block = dnxhd_decode_dct_block_10_444;
257
        else
258
66
            ctx->decode_dct_block = dnxhd_decode_dct_block_10;
259
66
        ctx->pix_fmt = AV_PIX_FMT_YUV422P10;
260
    } else {
261
432
        ctx->decode_dct_block = dnxhd_decode_dct_block_8;
262
432
        ctx->pix_fmt = AV_PIX_FMT_YUV422P;
263
    }
264
265
502
    ctx->avctx->bits_per_raw_sample = ctx->bit_depth = bitdepth;
266
502
    if (ctx->bit_depth != old_bit_depth) {
267
148
        ff_blockdsp_init(&ctx->bdsp, ctx->avctx);
268
148
        ff_idctdsp_init(&ctx->idsp, ctx->avctx);
269
148
        ff_init_scantable(ctx->idsp.idct_permutation, &ctx->scantable,
270
                          ff_zigzag_direct);
271
    }
272
273
    // make sure profile size constraints are respected
274
    // DNx100 allows 1920->1440 and 1280->960 subsampling
275
502
    if (ctx->width != ctx->cid_table->width &&
276
285
        ctx->cid_table->width != DNXHD_VARIABLE) {
277
2
        av_reduce(&ctx->avctx->sample_aspect_ratio.num,
278
2
                  &ctx->avctx->sample_aspect_ratio.den,
279
2
                  ctx->width, ctx->cid_table->width, 255);
280
2
        ctx->width = ctx->cid_table->width;
281
    }
282
283
502
    if (buf_size < ctx->cid_table->coding_unit_size) {
284
        av_log(ctx->avctx, AV_LOG_ERROR, "incorrect frame size (%d < %u).\n",
285
               buf_size, ctx->cid_table->coding_unit_size);
286
        return AVERROR_INVALIDDATA;
287
    }
288
289
502
    ctx->mb_width  = (ctx->width + 15)>> 4;
290
502
    ctx->mb_height = AV_RB16(buf + 0x16c);
291
292

502
    if ((ctx->height + 15) >> 4 == ctx->mb_height && frame->interlaced_frame)
293
134
        ctx->height <<= 1;
294
295
502
    av_log(ctx->avctx, AV_LOG_VERBOSE, "%dx%d, 4:%s %d bits, MBAFF=%d ACT=%d\n",
296
502
           ctx->width, ctx->height, ctx->is_444 ? "4:4" : "2:2",
297
           ctx->bit_depth, ctx->mbaff, ctx->act);
298
299
    // Newer format supports variable mb_scan_index sizes
300

502
    if (ctx->mb_height > 68 && ff_dnxhd_check_header_prefix_hr(header_prefix)) {
301
108
        ctx->data_offset = 0x170 + (ctx->mb_height << 2);
302
    } else {
303
394
        if (ctx->mb_height > 68) {
304
            av_log(ctx->avctx, AV_LOG_ERROR,
305
                   "mb height too big: %d\n", ctx->mb_height);
306
            return AVERROR_INVALIDDATA;
307
        }
308
394
        ctx->data_offset = 0x280;
309
    }
310
502
    if ((ctx->mb_height << frame->interlaced_frame) > (ctx->height + 15) >> 4) {
311
        av_log(ctx->avctx, AV_LOG_ERROR,
312
                "mb height too big: %d\n", ctx->mb_height);
313
        return AVERROR_INVALIDDATA;
314
    }
315
316
502
    if (buf_size < ctx->data_offset) {
317
        av_log(ctx->avctx, AV_LOG_ERROR,
318
               "buffer too small (%d < %d).\n", buf_size, ctx->data_offset);
319
        return AVERROR_INVALIDDATA;
320
    }
321
322
502
    if (ctx->mb_height > FF_ARRAY_ELEMS(ctx->mb_scan_index)) {
323
        av_log(ctx->avctx, AV_LOG_ERROR,
324
               "mb_height too big (%d > %"SIZE_SPECIFIER").\n", ctx->mb_height, FF_ARRAY_ELEMS(ctx->mb_scan_index));
325
        return AVERROR_INVALIDDATA;
326
    }
327
328
30675
    for (i = 0; i < ctx->mb_height; i++) {
329
30173
        ctx->mb_scan_index[i] = AV_RB32(buf + 0x170 + (i << 2));
330
        ff_dlog(ctx->avctx, "mb scan index %d, pos %d: %"PRIu32"\n",
331
                i, 0x170 + (i << 2), ctx->mb_scan_index[i]);
332
30173
        if (buf_size - ctx->data_offset < ctx->mb_scan_index[i]) {
333
            av_log(ctx->avctx, AV_LOG_ERROR,
334
                   "invalid mb scan index (%"PRIu32" vs %u).\n",
335
                   ctx->mb_scan_index[i], buf_size - ctx->data_offset);
336
            return AVERROR_INVALIDDATA;
337
        }
338
    }
339
340
502
    return 0;
341
}
342
343
34743936
static av_always_inline int dnxhd_decode_dct_block(const DNXHDContext *ctx,
344
                                                   RowContext *row,
345
                                                   int n,
346
                                                   int index_bits,
347
                                                   int level_bias,
348
                                                   int level_shift,
349
                                                   int dc_shift)
350
{
351
    int i, j, index1, index2, len, flags;
352
    int level, component, sign;
353
    const int *scale;
354
    const uint8_t *weight_matrix;
355
34743936
    const uint8_t *ac_info = ctx->cid_table->ac_info;
356
34743936
    int16_t *block = row->blocks[n];
357
34743936
    const int eob_index     = ctx->cid_table->eob_index;
358
34743936
    int ret = 0;
359
34743936
    OPEN_READER(bs, &row->gb);
360
361
34743936
    ctx->bdsp.clear_block(block);
362
363
34743936
    if (!ctx->is_444) {
364
34591296
        if (n & 2) {
365
17295648
            component     = 1 + (n & 1);
366
17295648
            scale = row->chroma_scale;
367
17295648
            weight_matrix = ctx->cid_table->chroma_weight;
368
        } else {
369
17295648
            component     = 0;
370
17295648
            scale = row->luma_scale;
371
17295648
            weight_matrix = ctx->cid_table->luma_weight;
372
        }
373
    } else {
374
152640
        component = (n >> 1) % 3;
375
152640
        if (component) {
376
101760
            scale = row->chroma_scale;
377
101760
            weight_matrix = ctx->cid_table->chroma_weight;
378
        } else {
379
50880
            scale = row->luma_scale;
380
50880
            weight_matrix = ctx->cid_table->luma_weight;
381
        }
382
    }
383
384
34743936
    UPDATE_CACHE(bs, &row->gb);
385
34743936
    GET_VLC(len, bs, &row->gb, ctx->dc_vlc.table, DNXHD_DC_VLC_BITS, 1);
386
34743936
    if (len < 0) {
387
        ret = len;
388
        goto error;
389
    }
390
34743936
    if (len) {
391
32365764
        level = GET_CACHE(bs, &row->gb);
392
32365764
        LAST_SKIP_BITS(bs, &row->gb, len);
393
32365764
        sign  = ~level >> 31;
394
32365764
        level = (NEG_USR32(sign ^ level, len) ^ sign) - sign;
395
32365764
        row->last_dc[component] += level * (1 << dc_shift);
396
    }
397
34743936
    block[0] = row->last_dc[component];
398
399
34743936
    i = 0;
400
401
34743936
    UPDATE_CACHE(bs, &row->gb);
402
34743936
    GET_VLC(index1, bs, &row->gb, ctx->ac_vlc.table,
403
            DNXHD_VLC_BITS, 2);
404
405
176938926
    while (index1 != eob_index) {
406
142194990
        level = ac_info[2*index1+0];
407
142194990
        flags = ac_info[2*index1+1];
408
409
142194990
        sign = SHOW_SBITS(bs, &row->gb, 1);
410
142194990
        SKIP_BITS(bs, &row->gb, 1);
411
412
142194990
        if (flags & 1) {
413
2609257
            level += SHOW_UBITS(bs, &row->gb, index_bits) << 7;
414
2609257
            SKIP_BITS(bs, &row->gb, index_bits);
415
        }
416
417
142194990
        if (flags & 2) {
418
46521250
            UPDATE_CACHE(bs, &row->gb);
419
46521250
            GET_VLC(index2, bs, &row->gb, ctx->run_vlc.table,
420
                    DNXHD_VLC_BITS, 2);
421
46521250
            i += ctx->cid_table->run[index2];
422
        }
423
424
142194990
        if (++i > 63) {
425
            av_log(ctx->avctx, AV_LOG_ERROR, "ac tex damaged %d, %d\n", n, i);
426
            ret = -1;
427
            break;
428
        }
429
430
142194990
        j     = ctx->scantable.permutated[i];
431
142194990
        level *= scale[i];
432
142194990
        level += scale[i] >> 1;
433

142194990
        if (level_bias < 32 || weight_matrix[i] != level_bias)
434
117255903
            level += level_bias; // 1<<(level_shift-1)
435
142194990
        level >>= level_shift;
436
437
142194990
        block[j] = (level ^ sign) - sign;
438
439
142194990
        UPDATE_CACHE(bs, &row->gb);
440
142194990
        GET_VLC(index1, bs, &row->gb, ctx->ac_vlc.table,
441
                DNXHD_VLC_BITS, 2);
442
    }
443
34743936
error:
444
34743936
    CLOSE_READER(bs, &row->gb);
445
34743936
    return ret;
446
}
447
448
32375616
static int dnxhd_decode_dct_block_8(const DNXHDContext *ctx,
449
                                    RowContext *row, int n)
450
{
451
32375616
    return dnxhd_decode_dct_block(ctx, row, n, 4, 32, 6, 0);
452
}
453
454
2085120
static int dnxhd_decode_dct_block_10(const DNXHDContext *ctx,
455
                                     RowContext *row, int n)
456
{
457
2085120
    return dnxhd_decode_dct_block(ctx, row, n, 6, 8, 4, 0);
458
}
459
460
152640
static int dnxhd_decode_dct_block_10_444(const DNXHDContext *ctx,
461
                                         RowContext *row, int n)
462
{
463
152640
    return dnxhd_decode_dct_block(ctx, row, n, 6, 32, 6, 0);
464
}
465
466
130560
static int dnxhd_decode_dct_block_12(const DNXHDContext *ctx,
467
                                     RowContext *row, int n)
468
{
469
130560
    return dnxhd_decode_dct_block(ctx, row, n, 6, 8, 4, 2);
470
}
471
472
static int dnxhd_decode_dct_block_12_444(const DNXHDContext *ctx,
473
                                         RowContext *row, int n)
474
{
475
    return dnxhd_decode_dct_block(ctx, row, n, 6, 32, 4, 2);
476
}
477
478
4336632
static int dnxhd_decode_macroblock(const DNXHDContext *ctx, RowContext *row,
479
                                   AVFrame *frame, int x, int y)
480
{
481
4336632
    int shift1 = ctx->bit_depth >= 10;
482
4336632
    int dct_linesize_luma   = frame->linesize[0];
483
4336632
    int dct_linesize_chroma = frame->linesize[1];
484
    uint8_t *dest_y, *dest_u, *dest_v;
485
    int dct_y_offset, dct_x_offset;
486
    int qscale, i, act;
487
4336632
    int interlaced_mb = 0;
488
489
4336632
    if (ctx->mbaff) {
490
12240
        interlaced_mb = get_bits1(&row->gb);
491
12240
        qscale = get_bits(&row->gb, 10);
492
    } else {
493
4324392
        qscale = get_bits(&row->gb, 11);
494
    }
495
4336632
    act = get_bits1(&row->gb);
496
4336632
    if (act) {
497
12720
        if (!ctx->act) {
498
            static int act_warned;
499
            if (!act_warned) {
500
                act_warned = 1;
501
                av_log(ctx->avctx, AV_LOG_ERROR,
502
                       "ACT flag set, in violation of frame header.\n");
503
            }
504
12720
        } else if (row->format == -1) {
505
2
            row->format = act;
506
12718
        } else if (row->format != act) {
507
            row->format = 2; // Variable
508
        }
509
    }
510
511
4336632
    if (qscale != row->last_qscale) {
512
23037300
        for (i = 0; i < 64; i++) {
513
22682880
            row->luma_scale[i]   = qscale * ctx->cid_table->luma_weight[i];
514
22682880
            row->chroma_scale[i] = qscale * ctx->cid_table->chroma_weight[i];
515
        }
516
354420
        row->last_qscale = qscale;
517
    }
518
519
39080568
    for (i = 0; i < 8 + 4 * ctx->is_444; i++) {
520
34743936
        if (ctx->decode_dct_block(ctx, row, i) < 0)
521
            return AVERROR_INVALIDDATA;
522
    }
523
524
4336632
    if (frame->interlaced_frame) {
525
546720
        dct_linesize_luma   <<= 1;
526
546720
        dct_linesize_chroma <<= 1;
527
    }
528
529
4336632
    dest_y = frame->data[0] + ((y * dct_linesize_luma)   << 4) + (x << (4 + shift1));
530
4336632
    dest_u = frame->data[1] + ((y * dct_linesize_chroma) << 4) + (x << (3 + shift1 + ctx->is_444));
531
4336632
    dest_v = frame->data[2] + ((y * dct_linesize_chroma) << 4) + (x << (3 + shift1 + ctx->is_444));
532
533

4336632
    if (frame->interlaced_frame && ctx->cur_field) {
534
273360
        dest_y += frame->linesize[0];
535
273360
        dest_u += frame->linesize[1];
536
273360
        dest_v += frame->linesize[2];
537
    }
538
4336632
    if (interlaced_mb) {
539
3224
        dct_linesize_luma   <<= 1;
540
3224
        dct_linesize_chroma <<= 1;
541
    }
542
543
4336632
    dct_y_offset = interlaced_mb ? frame->linesize[0] : (dct_linesize_luma << 3);
544
4336632
    dct_x_offset = 8 << shift1;
545
4336632
    if (!ctx->is_444) {
546
4323912
        ctx->idsp.idct_put(dest_y,                               dct_linesize_luma, row->blocks[0]);
547
4323912
        ctx->idsp.idct_put(dest_y + dct_x_offset,                dct_linesize_luma, row->blocks[1]);
548
4323912
        ctx->idsp.idct_put(dest_y + dct_y_offset,                dct_linesize_luma, row->blocks[4]);
549
4323912
        ctx->idsp.idct_put(dest_y + dct_y_offset + dct_x_offset, dct_linesize_luma, row->blocks[5]);
550
551
4323912
        if (!(ctx->avctx->flags & AV_CODEC_FLAG_GRAY)) {
552
4323912
            dct_y_offset = interlaced_mb ? frame->linesize[1] : (dct_linesize_chroma << 3);
553
4323912
            ctx->idsp.idct_put(dest_u,                dct_linesize_chroma, row->blocks[2]);
554
4323912
            ctx->idsp.idct_put(dest_v,                dct_linesize_chroma, row->blocks[3]);
555
4323912
            ctx->idsp.idct_put(dest_u + dct_y_offset, dct_linesize_chroma, row->blocks[6]);
556
4323912
            ctx->idsp.idct_put(dest_v + dct_y_offset, dct_linesize_chroma, row->blocks[7]);
557
        }
558
    } else {
559
12720
        ctx->idsp.idct_put(dest_y,                               dct_linesize_luma, row->blocks[0]);
560
12720
        ctx->idsp.idct_put(dest_y + dct_x_offset,                dct_linesize_luma, row->blocks[1]);
561
12720
        ctx->idsp.idct_put(dest_y + dct_y_offset,                dct_linesize_luma, row->blocks[6]);
562
12720
        ctx->idsp.idct_put(dest_y + dct_y_offset + dct_x_offset, dct_linesize_luma, row->blocks[7]);
563
564
12720
        if (!(ctx->avctx->flags & AV_CODEC_FLAG_GRAY)) {
565
12720
            dct_y_offset = interlaced_mb ? frame->linesize[1] : (dct_linesize_chroma << 3);
566
12720
            ctx->idsp.idct_put(dest_u,                               dct_linesize_chroma, row->blocks[2]);
567
12720
            ctx->idsp.idct_put(dest_u + dct_x_offset,                dct_linesize_chroma, row->blocks[3]);
568
12720
            ctx->idsp.idct_put(dest_u + dct_y_offset,                dct_linesize_chroma, row->blocks[8]);
569
12720
            ctx->idsp.idct_put(dest_u + dct_y_offset + dct_x_offset, dct_linesize_chroma, row->blocks[9]);
570
12720
            ctx->idsp.idct_put(dest_v,                               dct_linesize_chroma, row->blocks[4]);
571
12720
            ctx->idsp.idct_put(dest_v + dct_x_offset,                dct_linesize_chroma, row->blocks[5]);
572
12720
            ctx->idsp.idct_put(dest_v + dct_y_offset,                dct_linesize_chroma, row->blocks[10]);
573
12720
            ctx->idsp.idct_put(dest_v + dct_y_offset + dct_x_offset, dct_linesize_chroma, row->blocks[11]);
574
        }
575
    }
576
577
4336632
    return 0;
578
}
579
580
30173
static int dnxhd_decode_row(AVCodecContext *avctx, void *data,
581
                            int rownb, int threadnb)
582
{
583
30173
    const DNXHDContext *ctx = avctx->priv_data;
584
30173
    uint32_t offset = ctx->mb_scan_index[rownb];
585
30173
    RowContext *row = ctx->rows + threadnb;
586
    int x, ret;
587
588
30173
    row->last_dc[0] =
589
30173
    row->last_dc[1] =
590
30173
    row->last_dc[2] = 1 << (ctx->bit_depth + 2); // for levels +2^(bitdepth-1)
591
30173
    ret = init_get_bits8(&row->gb, ctx->buf + offset, ctx->buf_size - offset);
592
30173
    if (ret < 0) {
593
        row->errors++;
594
        return ret;
595
    }
596
4366805
    for (x = 0; x < ctx->mb_width; x++) {
597
4336632
        int ret = dnxhd_decode_macroblock(ctx, row, data, x, rownb);
598
4336632
        if (ret < 0) {
599
            row->errors++;
600
            return ret;
601
        }
602
    }
603
604
30173
    return 0;
605
}
606
607
435
static int dnxhd_decode_frame(AVCodecContext *avctx, void *data,
608
                              int *got_frame, AVPacket *avpkt)
609
{
610
435
    const uint8_t *buf = avpkt->data;
611
435
    int buf_size = avpkt->size;
612
435
    DNXHDContext *ctx = avctx->priv_data;
613
435
    ThreadFrame frame = { .f = data };
614
435
    AVFrame *picture = data;
615
435
    int first_field = 1;
616
    int ret, i;
617
618
    ff_dlog(avctx, "frame size %d\n", buf_size);
619
620
870
    for (i = 0; i < avctx->thread_count; i++)
621
435
        ctx->rows[i].format = -1;
622
623
435
decode_coding_unit:
624
502
    if ((ret = dnxhd_decode_header(ctx, picture, buf, buf_size, first_field)) < 0)
625
        return ret;
626
627

502
    if ((avctx->width || avctx->height) &&
628

456
        (ctx->width != avctx->width || ctx->height != avctx->height)) {
629
2
        av_log(avctx, AV_LOG_WARNING, "frame size changed: %dx%d -> %ux%u\n",
630
               avctx->width, avctx->height, ctx->width, ctx->height);
631
2
        first_field = 1;
632
    }
633

502
    if (avctx->pix_fmt != AV_PIX_FMT_NONE && avctx->pix_fmt != ctx->pix_fmt) {
634
        av_log(avctx, AV_LOG_WARNING, "pix_fmt changed: %s -> %s\n",
635
               av_get_pix_fmt_name(avctx->pix_fmt), av_get_pix_fmt_name(ctx->pix_fmt));
636
        first_field = 1;
637
    }
638
639
502
    avctx->pix_fmt = ctx->pix_fmt;
640
502
    ret = ff_set_dimensions(avctx, ctx->width, ctx->height);
641
502
    if (ret < 0)
642
        return ret;
643
644
502
    if (first_field) {
645
435
        if ((ret = ff_thread_get_buffer(avctx, &frame, 0)) < 0)
646
            return ret;
647
435
        picture->pict_type = AV_PICTURE_TYPE_I;
648
435
        picture->key_frame = 1;
649
    }
650
651
502
    ctx->buf_size = buf_size - ctx->data_offset;
652
502
    ctx->buf = buf + ctx->data_offset;
653
502
    avctx->execute2(avctx, dnxhd_decode_row, picture, NULL, ctx->mb_height);
654
655

502
    if (first_field && picture->interlaced_frame) {
656
67
        buf      += ctx->cid_table->coding_unit_size;
657
67
        buf_size -= ctx->cid_table->coding_unit_size;
658
67
        first_field = 0;
659
67
        goto decode_coding_unit;
660
    }
661
662
435
    ret = 0;
663
870
    for (i = 0; i < avctx->thread_count; i++) {
664
435
        ret += ctx->rows[i].errors;
665
435
        ctx->rows[i].errors = 0;
666
    }
667
668
435
    if (ctx->act) {
669
        static int act_warned;
670
2
        int format = ctx->rows[0].format;
671
2
        for (i = 1; i < avctx->thread_count; i++) {
672
            if (ctx->rows[i].format != format &&
673
                ctx->rows[i].format != -1 /* not run */) {
674
                format = 2;
675
                break;
676
            }
677
        }
678

2
        switch (format) {
679
        case -1:
680
        case 2:
681
            if (!act_warned) {
682
                act_warned = 1;
683
                av_log(ctx->avctx, AV_LOG_ERROR,
684
                       "Unsupported: variable ACT flag.\n");
685
            }
686
            break;
687
        case 0:
688
            ctx->pix_fmt = ctx->bit_depth==10
689
                         ? AV_PIX_FMT_GBRP10 : AV_PIX_FMT_GBRP12;
690
            break;
691
2
        case 1:
692
4
            ctx->pix_fmt = ctx->bit_depth==10
693
2
                         ? AV_PIX_FMT_YUV444P10 : AV_PIX_FMT_YUV444P12;
694
2
            break;
695
        }
696
433
    }
697
435
    avctx->pix_fmt = ctx->pix_fmt;
698
435
    if (ret) {
699
        av_log(ctx->avctx, AV_LOG_ERROR, "%d lines with errors\n", ret);
700
        return AVERROR_INVALIDDATA;
701
    }
702
703
435
    *got_frame = 1;
704
435
    return avpkt->size;
705
}
706
707
149
static av_cold int dnxhd_decode_close(AVCodecContext *avctx)
708
{
709
149
    DNXHDContext *ctx = avctx->priv_data;
710
711
149
    ff_free_vlc(&ctx->ac_vlc);
712
149
    ff_free_vlc(&ctx->dc_vlc);
713
149
    ff_free_vlc(&ctx->run_vlc);
714
715
149
    av_freep(&ctx->rows);
716
717
149
    return 0;
718
}
719
720
AVCodec ff_dnxhd_decoder = {
721
    .name           = "dnxhd",
722
    .long_name      = NULL_IF_CONFIG_SMALL("VC3/DNxHD"),
723
    .type           = AVMEDIA_TYPE_VIDEO,
724
    .id             = AV_CODEC_ID_DNXHD,
725
    .priv_data_size = sizeof(DNXHDContext),
726
    .init           = dnxhd_decode_init,
727
    .close          = dnxhd_decode_close,
728
    .decode         = dnxhd_decode_frame,
729
    .capabilities   = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_FRAME_THREADS |
730
                      AV_CODEC_CAP_SLICE_THREADS,
731
    .profiles       = NULL_IF_CONFIG_SMALL(ff_dnxhd_profiles),
732
};