GCC Code Coverage Report
Directory: ../../../ffmpeg/ Exec Total Coverage
File: src/libavcodec/dnxhddec.c Lines: 312 389 80.2 %
Date: 2021-01-20 23:14:43 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
        int index;
117
118
148
        if ((index = ff_dnxhd_get_cid_table(cid)) < 0) {
119
            av_log(ctx->avctx, AV_LOG_ERROR, "unsupported cid %"PRIu32"\n", cid);
120
            return AVERROR(ENOSYS);
121
        }
122
148
        if (ff_dnxhd_cid_table[index].bit_depth != bitdepth &&
123
4
            ff_dnxhd_cid_table[index].bit_depth != DNXHD_VARIABLE) {
124
            av_log(ctx->avctx, AV_LOG_ERROR, "bit depth mismatches %d %d\n", ff_dnxhd_cid_table[index].bit_depth, bitdepth);
125
            return AVERROR_INVALIDDATA;
126
        }
127
148
        ctx->cid_table = &ff_dnxhd_cid_table[index];
128
148
        av_log(ctx->avctx, AV_LOG_VERBOSE, "Profile cid %"PRIu32".\n", cid);
129
130
148
        ff_free_vlc(&ctx->ac_vlc);
131
148
        ff_free_vlc(&ctx->dc_vlc);
132
148
        ff_free_vlc(&ctx->run_vlc);
133
134
148
        init_vlc(&ctx->ac_vlc, DNXHD_VLC_BITS, 257,
135
                 ctx->cid_table->ac_bits, 1, 1,
136
                 ctx->cid_table->ac_codes, 2, 2, 0);
137
148
        init_vlc(&ctx->dc_vlc, DNXHD_DC_VLC_BITS, bitdepth > 8 ? 14 : 12,
138
                 ctx->cid_table->dc_bits, 1, 1,
139
                 ctx->cid_table->dc_codes, 1, 1, 0);
140
148
        init_vlc(&ctx->run_vlc, DNXHD_VLC_BITS, 62,
141
                 ctx->cid_table->run_bits, 1, 1,
142
                 ctx->cid_table->run_codes, 2, 2, 0);
143
144
148
        ctx->cid = cid;
145
    }
146
502
    return 0;
147
}
148
149
502
static int dnxhd_get_profile(int cid)
150
{
151

502
    switch(cid) {
152
2
    case 1270:
153
2
        return FF_PROFILE_DNXHR_444;
154
2
    case 1271:
155
2
        return FF_PROFILE_DNXHR_HQX;
156
120
    case 1272:
157
120
        return FF_PROFILE_DNXHR_HQ;
158
48
    case 1273:
159
48
        return FF_PROFILE_DNXHR_SQ;
160
111
    case 1274:
161
111
        return FF_PROFILE_DNXHR_LB;
162
    }
163
219
    return FF_PROFILE_DNXHD;
164
}
165
166
502
static int dnxhd_decode_header(DNXHDContext *ctx, AVFrame *frame,
167
                               const uint8_t *buf, int buf_size,
168
                               int first_field)
169
{
170
    int i, cid, ret;
171
502
    int old_bit_depth = ctx->bit_depth, bitdepth;
172
    uint64_t header_prefix;
173
502
    if (buf_size < 0x280) {
174
        av_log(ctx->avctx, AV_LOG_ERROR,
175
               "buffer too small (%d < 640).\n", buf_size);
176
        return AVERROR_INVALIDDATA;
177
    }
178
179
502
    header_prefix = ff_dnxhd_parse_header_prefix(buf);
180
502
    if (header_prefix == 0) {
181
        av_log(ctx->avctx, AV_LOG_ERROR,
182
               "unknown header 0x%02X 0x%02X 0x%02X 0x%02X 0x%02X\n",
183
               buf[0], buf[1], buf[2], buf[3], buf[4]);
184
        return AVERROR_INVALIDDATA;
185
    }
186
502
    if (buf[5] & 2) { /* interlaced */
187
134
        ctx->cur_field = buf[5] & 1;
188
134
        frame->interlaced_frame = 1;
189
134
        frame->top_field_first  = first_field ^ ctx->cur_field;
190
134
        av_log(ctx->avctx, AV_LOG_DEBUG,
191
134
               "interlaced %d, cur field %d\n", buf[5] & 3, ctx->cur_field);
192
    } else {
193
368
        ctx->cur_field = 0;
194
    }
195
502
    ctx->mbaff = (buf[0x6] >> 5) & 1;
196
502
    ctx->alpha = buf[0x7] & 1;
197
502
    ctx->lla   = (buf[0x7] >> 1) & 1;
198
502
    if (ctx->alpha)
199
        avpriv_request_sample(ctx->avctx, "alpha");
200
201
502
    ctx->height = AV_RB16(buf + 0x18);
202
502
    ctx->width  = AV_RB16(buf + 0x1a);
203
204

502
    switch(buf[0x21] >> 5) {
205
432
    case 1: bitdepth = 8; break;
206
68
    case 2: bitdepth = 10; break;
207
2
    case 3: bitdepth = 12; break;
208
    default:
209
        av_log(ctx->avctx, AV_LOG_ERROR,
210
               "Unknown bitdepth indicator (%d)\n", buf[0x21] >> 5);
211
        return AVERROR_INVALIDDATA;
212
    }
213
214
502
    cid = AV_RB32(buf + 0x28);
215
216
502
    ctx->avctx->profile = dnxhd_get_profile(cid);
217
218
502
    if ((ret = dnxhd_init_vlc(ctx, cid, bitdepth)) < 0)
219
        return ret;
220

502
    if (ctx->mbaff && ctx->cid_table->cid != 1260)
221
        av_log(ctx->avctx, AV_LOG_WARNING,
222
               "Adaptive MB interlace flag in an unsupported profile.\n");
223
224

502
    switch ((buf[0x2C] >> 1) & 3) {
225
502
    case 0: frame->colorspace = AVCOL_SPC_BT709;       break;
226
    case 1: frame->colorspace = AVCOL_SPC_BT2020_NCL;  break;
227
    case 2: frame->colorspace = AVCOL_SPC_BT2020_CL;   break;
228
    case 3: frame->colorspace = AVCOL_SPC_UNSPECIFIED; break;
229
    }
230
231
502
    ctx->act = buf[0x2C] & 1;
232

502
    if (ctx->act && ctx->cid_table->cid != 1256 && ctx->cid_table->cid != 1270)
233
        av_log(ctx->avctx, AV_LOG_WARNING,
234
               "Adaptive color transform in an unsupported profile.\n");
235
236
502
    ctx->is_444 = (buf[0x2C] >> 6) & 1;
237
502
    if (ctx->is_444) {
238
2
        if (bitdepth == 8) {
239
            avpriv_request_sample(ctx->avctx, "4:4:4 8 bits");
240
            return AVERROR_INVALIDDATA;
241
2
        } else if (bitdepth == 10) {
242
2
            ctx->decode_dct_block = dnxhd_decode_dct_block_10_444;
243
2
            ctx->pix_fmt = ctx->act ? AV_PIX_FMT_YUV444P10
244
2
                                    : AV_PIX_FMT_GBRP10;
245
        } else {
246
            ctx->decode_dct_block = dnxhd_decode_dct_block_12_444;
247
            ctx->pix_fmt = ctx->act ? AV_PIX_FMT_YUV444P12
248
                                    : AV_PIX_FMT_GBRP12;
249
        }
250
500
    } else if (bitdepth == 12) {
251
2
        ctx->decode_dct_block = dnxhd_decode_dct_block_12;
252
2
        ctx->pix_fmt = AV_PIX_FMT_YUV422P12;
253
498
    } else if (bitdepth == 10) {
254
66
        if (ctx->avctx->profile == FF_PROFILE_DNXHR_HQX)
255
            ctx->decode_dct_block = dnxhd_decode_dct_block_10_444;
256
        else
257
66
            ctx->decode_dct_block = dnxhd_decode_dct_block_10;
258
66
        ctx->pix_fmt = AV_PIX_FMT_YUV422P10;
259
    } else {
260
432
        ctx->decode_dct_block = dnxhd_decode_dct_block_8;
261
432
        ctx->pix_fmt = AV_PIX_FMT_YUV422P;
262
    }
263
264
502
    ctx->avctx->bits_per_raw_sample = ctx->bit_depth = bitdepth;
265
502
    if (ctx->bit_depth != old_bit_depth) {
266
148
        ff_blockdsp_init(&ctx->bdsp, ctx->avctx);
267
148
        ff_idctdsp_init(&ctx->idsp, ctx->avctx);
268
148
        ff_init_scantable(ctx->idsp.idct_permutation, &ctx->scantable,
269
                          ff_zigzag_direct);
270
    }
271
272
    // make sure profile size constraints are respected
273
    // DNx100 allows 1920->1440 and 1280->960 subsampling
274
502
    if (ctx->width != ctx->cid_table->width &&
275
285
        ctx->cid_table->width != DNXHD_VARIABLE) {
276
2
        av_reduce(&ctx->avctx->sample_aspect_ratio.num,
277
2
                  &ctx->avctx->sample_aspect_ratio.den,
278
2
                  ctx->width, ctx->cid_table->width, 255);
279
2
        ctx->width = ctx->cid_table->width;
280
    }
281
282
502
    if (buf_size < ctx->cid_table->coding_unit_size) {
283
        av_log(ctx->avctx, AV_LOG_ERROR, "incorrect frame size (%d < %u).\n",
284
               buf_size, ctx->cid_table->coding_unit_size);
285
        return AVERROR_INVALIDDATA;
286
    }
287
288
502
    ctx->mb_width  = (ctx->width + 15)>> 4;
289
502
    ctx->mb_height = AV_RB16(buf + 0x16c);
290
291

502
    if ((ctx->height + 15) >> 4 == ctx->mb_height && frame->interlaced_frame)
292
134
        ctx->height <<= 1;
293
294
502
    av_log(ctx->avctx, AV_LOG_VERBOSE, "%dx%d, 4:%s %d bits, MBAFF=%d ACT=%d\n",
295
502
           ctx->width, ctx->height, ctx->is_444 ? "4:4" : "2:2",
296
           ctx->bit_depth, ctx->mbaff, ctx->act);
297
298
    // Newer format supports variable mb_scan_index sizes
299

502
    if (ctx->mb_height > 68 && ff_dnxhd_check_header_prefix_hr(header_prefix)) {
300
108
        ctx->data_offset = 0x170 + (ctx->mb_height << 2);
301
    } else {
302
394
        if (ctx->mb_height > 68) {
303
            av_log(ctx->avctx, AV_LOG_ERROR,
304
                   "mb height too big: %d\n", ctx->mb_height);
305
            return AVERROR_INVALIDDATA;
306
        }
307
394
        ctx->data_offset = 0x280;
308
    }
309
502
    if ((ctx->mb_height << frame->interlaced_frame) > (ctx->height + 15) >> 4) {
310
        av_log(ctx->avctx, AV_LOG_ERROR,
311
                "mb height too big: %d\n", ctx->mb_height);
312
        return AVERROR_INVALIDDATA;
313
    }
314
315
502
    if (buf_size < ctx->data_offset) {
316
        av_log(ctx->avctx, AV_LOG_ERROR,
317
               "buffer too small (%d < %d).\n", buf_size, ctx->data_offset);
318
        return AVERROR_INVALIDDATA;
319
    }
320
321
502
    if (ctx->mb_height > FF_ARRAY_ELEMS(ctx->mb_scan_index)) {
322
        av_log(ctx->avctx, AV_LOG_ERROR,
323
               "mb_height too big (%d > %"SIZE_SPECIFIER").\n", ctx->mb_height, FF_ARRAY_ELEMS(ctx->mb_scan_index));
324
        return AVERROR_INVALIDDATA;
325
    }
326
327
30675
    for (i = 0; i < ctx->mb_height; i++) {
328
30173
        ctx->mb_scan_index[i] = AV_RB32(buf + 0x170 + (i << 2));
329
        ff_dlog(ctx->avctx, "mb scan index %d, pos %d: %"PRIu32"\n",
330
                i, 0x170 + (i << 2), ctx->mb_scan_index[i]);
331
30173
        if (buf_size - ctx->data_offset < ctx->mb_scan_index[i]) {
332
            av_log(ctx->avctx, AV_LOG_ERROR,
333
                   "invalid mb scan index (%"PRIu32" vs %u).\n",
334
                   ctx->mb_scan_index[i], buf_size - ctx->data_offset);
335
            return AVERROR_INVALIDDATA;
336
        }
337
    }
338
339
502
    return 0;
340
}
341
342
34743936
static av_always_inline int dnxhd_decode_dct_block(const DNXHDContext *ctx,
343
                                                   RowContext *row,
344
                                                   int n,
345
                                                   int index_bits,
346
                                                   int level_bias,
347
                                                   int level_shift,
348
                                                   int dc_shift)
349
{
350
    int i, j, index1, index2, len, flags;
351
    int level, component, sign;
352
    const int *scale;
353
    const uint8_t *weight_matrix;
354
34743936
    const uint8_t *ac_info = ctx->cid_table->ac_info;
355
34743936
    int16_t *block = row->blocks[n];
356
34743936
    const int eob_index     = ctx->cid_table->eob_index;
357
34743936
    int ret = 0;
358
34743936
    OPEN_READER(bs, &row->gb);
359
360
34743936
    ctx->bdsp.clear_block(block);
361
362
34743936
    if (!ctx->is_444) {
363
34591296
        if (n & 2) {
364
17295648
            component     = 1 + (n & 1);
365
17295648
            scale = row->chroma_scale;
366
17295648
            weight_matrix = ctx->cid_table->chroma_weight;
367
        } else {
368
17295648
            component     = 0;
369
17295648
            scale = row->luma_scale;
370
17295648
            weight_matrix = ctx->cid_table->luma_weight;
371
        }
372
    } else {
373
152640
        component = (n >> 1) % 3;
374
152640
        if (component) {
375
101760
            scale = row->chroma_scale;
376
101760
            weight_matrix = ctx->cid_table->chroma_weight;
377
        } else {
378
50880
            scale = row->luma_scale;
379
50880
            weight_matrix = ctx->cid_table->luma_weight;
380
        }
381
    }
382
383
34743936
    UPDATE_CACHE(bs, &row->gb);
384
34743936
    GET_VLC(len, bs, &row->gb, ctx->dc_vlc.table, DNXHD_DC_VLC_BITS, 1);
385
34743936
    if (len < 0) {
386
        ret = len;
387
        goto error;
388
    }
389
34743936
    if (len) {
390
32365764
        level = GET_CACHE(bs, &row->gb);
391
32365764
        LAST_SKIP_BITS(bs, &row->gb, len);
392
32365764
        sign  = ~level >> 31;
393
32365764
        level = (NEG_USR32(sign ^ level, len) ^ sign) - sign;
394
32365764
        row->last_dc[component] += level * (1 << dc_shift);
395
    }
396
34743936
    block[0] = row->last_dc[component];
397
398
34743936
    i = 0;
399
400
34743936
    UPDATE_CACHE(bs, &row->gb);
401
34743936
    GET_VLC(index1, bs, &row->gb, ctx->ac_vlc.table,
402
            DNXHD_VLC_BITS, 2);
403
404
176938926
    while (index1 != eob_index) {
405
142194990
        level = ac_info[2*index1+0];
406
142194990
        flags = ac_info[2*index1+1];
407
408
142194990
        sign = SHOW_SBITS(bs, &row->gb, 1);
409
142194990
        SKIP_BITS(bs, &row->gb, 1);
410
411
142194990
        if (flags & 1) {
412
2609257
            level += SHOW_UBITS(bs, &row->gb, index_bits) << 7;
413
2609257
            SKIP_BITS(bs, &row->gb, index_bits);
414
        }
415
416
142194990
        if (flags & 2) {
417
46521250
            UPDATE_CACHE(bs, &row->gb);
418
46521250
            GET_VLC(index2, bs, &row->gb, ctx->run_vlc.table,
419
                    DNXHD_VLC_BITS, 2);
420
46521250
            i += ctx->cid_table->run[index2];
421
        }
422
423
142194990
        if (++i > 63) {
424
            av_log(ctx->avctx, AV_LOG_ERROR, "ac tex damaged %d, %d\n", n, i);
425
            ret = -1;
426
            break;
427
        }
428
429
142194990
        j     = ctx->scantable.permutated[i];
430
142194990
        level *= scale[i];
431
142194990
        level += scale[i] >> 1;
432

142194990
        if (level_bias < 32 || weight_matrix[i] != level_bias)
433
117255903
            level += level_bias; // 1<<(level_shift-1)
434
142194990
        level >>= level_shift;
435
436
142194990
        block[j] = (level ^ sign) - sign;
437
438
142194990
        UPDATE_CACHE(bs, &row->gb);
439
142194990
        GET_VLC(index1, bs, &row->gb, ctx->ac_vlc.table,
440
                DNXHD_VLC_BITS, 2);
441
    }
442
34743936
error:
443
34743936
    CLOSE_READER(bs, &row->gb);
444
34743936
    return ret;
445
}
446
447
32375616
static int dnxhd_decode_dct_block_8(const DNXHDContext *ctx,
448
                                    RowContext *row, int n)
449
{
450
32375616
    return dnxhd_decode_dct_block(ctx, row, n, 4, 32, 6, 0);
451
}
452
453
2085120
static int dnxhd_decode_dct_block_10(const DNXHDContext *ctx,
454
                                     RowContext *row, int n)
455
{
456
2085120
    return dnxhd_decode_dct_block(ctx, row, n, 6, 8, 4, 0);
457
}
458
459
152640
static int dnxhd_decode_dct_block_10_444(const DNXHDContext *ctx,
460
                                         RowContext *row, int n)
461
{
462
152640
    return dnxhd_decode_dct_block(ctx, row, n, 6, 32, 6, 0);
463
}
464
465
130560
static int dnxhd_decode_dct_block_12(const DNXHDContext *ctx,
466
                                     RowContext *row, int n)
467
{
468
130560
    return dnxhd_decode_dct_block(ctx, row, n, 6, 8, 4, 2);
469
}
470
471
static int dnxhd_decode_dct_block_12_444(const DNXHDContext *ctx,
472
                                         RowContext *row, int n)
473
{
474
    return dnxhd_decode_dct_block(ctx, row, n, 6, 32, 4, 2);
475
}
476
477
4336632
static int dnxhd_decode_macroblock(const DNXHDContext *ctx, RowContext *row,
478
                                   AVFrame *frame, int x, int y)
479
{
480
4336632
    int shift1 = ctx->bit_depth >= 10;
481
4336632
    int dct_linesize_luma   = frame->linesize[0];
482
4336632
    int dct_linesize_chroma = frame->linesize[1];
483
    uint8_t *dest_y, *dest_u, *dest_v;
484
    int dct_y_offset, dct_x_offset;
485
    int qscale, i, act;
486
4336632
    int interlaced_mb = 0;
487
488
4336632
    if (ctx->mbaff) {
489
12240
        interlaced_mb = get_bits1(&row->gb);
490
12240
        qscale = get_bits(&row->gb, 10);
491
    } else {
492
4324392
        qscale = get_bits(&row->gb, 11);
493
    }
494
4336632
    act = get_bits1(&row->gb);
495
4336632
    if (act) {
496
12720
        if (!ctx->act) {
497
            static int act_warned;
498
            if (!act_warned) {
499
                act_warned = 1;
500
                av_log(ctx->avctx, AV_LOG_ERROR,
501
                       "ACT flag set, in violation of frame header.\n");
502
            }
503
12720
        } else if (row->format == -1) {
504
2
            row->format = act;
505
12718
        } else if (row->format != act) {
506
            row->format = 2; // Variable
507
        }
508
    }
509
510
4336632
    if (qscale != row->last_qscale) {
511
23037300
        for (i = 0; i < 64; i++) {
512
22682880
            row->luma_scale[i]   = qscale * ctx->cid_table->luma_weight[i];
513
22682880
            row->chroma_scale[i] = qscale * ctx->cid_table->chroma_weight[i];
514
        }
515
354420
        row->last_qscale = qscale;
516
    }
517
518
39080568
    for (i = 0; i < 8 + 4 * ctx->is_444; i++) {
519
34743936
        if (ctx->decode_dct_block(ctx, row, i) < 0)
520
            return AVERROR_INVALIDDATA;
521
    }
522
523
4336632
    if (frame->interlaced_frame) {
524
546720
        dct_linesize_luma   <<= 1;
525
546720
        dct_linesize_chroma <<= 1;
526
    }
527
528
4336632
    dest_y = frame->data[0] + ((y * dct_linesize_luma)   << 4) + (x << (4 + shift1));
529
4336632
    dest_u = frame->data[1] + ((y * dct_linesize_chroma) << 4) + (x << (3 + shift1 + ctx->is_444));
530
4336632
    dest_v = frame->data[2] + ((y * dct_linesize_chroma) << 4) + (x << (3 + shift1 + ctx->is_444));
531
532

4336632
    if (frame->interlaced_frame && ctx->cur_field) {
533
273360
        dest_y += frame->linesize[0];
534
273360
        dest_u += frame->linesize[1];
535
273360
        dest_v += frame->linesize[2];
536
    }
537
4336632
    if (interlaced_mb) {
538
3224
        dct_linesize_luma   <<= 1;
539
3224
        dct_linesize_chroma <<= 1;
540
    }
541
542
4336632
    dct_y_offset = interlaced_mb ? frame->linesize[0] : (dct_linesize_luma << 3);
543
4336632
    dct_x_offset = 8 << shift1;
544
4336632
    if (!ctx->is_444) {
545
4323912
        ctx->idsp.idct_put(dest_y,                               dct_linesize_luma, row->blocks[0]);
546
4323912
        ctx->idsp.idct_put(dest_y + dct_x_offset,                dct_linesize_luma, row->blocks[1]);
547
4323912
        ctx->idsp.idct_put(dest_y + dct_y_offset,                dct_linesize_luma, row->blocks[4]);
548
4323912
        ctx->idsp.idct_put(dest_y + dct_y_offset + dct_x_offset, dct_linesize_luma, row->blocks[5]);
549
550
4323912
        if (!(ctx->avctx->flags & AV_CODEC_FLAG_GRAY)) {
551
4323912
            dct_y_offset = interlaced_mb ? frame->linesize[1] : (dct_linesize_chroma << 3);
552
4323912
            ctx->idsp.idct_put(dest_u,                dct_linesize_chroma, row->blocks[2]);
553
4323912
            ctx->idsp.idct_put(dest_v,                dct_linesize_chroma, row->blocks[3]);
554
4323912
            ctx->idsp.idct_put(dest_u + dct_y_offset, dct_linesize_chroma, row->blocks[6]);
555
4323912
            ctx->idsp.idct_put(dest_v + dct_y_offset, dct_linesize_chroma, row->blocks[7]);
556
        }
557
    } else {
558
12720
        ctx->idsp.idct_put(dest_y,                               dct_linesize_luma, row->blocks[0]);
559
12720
        ctx->idsp.idct_put(dest_y + dct_x_offset,                dct_linesize_luma, row->blocks[1]);
560
12720
        ctx->idsp.idct_put(dest_y + dct_y_offset,                dct_linesize_luma, row->blocks[6]);
561
12720
        ctx->idsp.idct_put(dest_y + dct_y_offset + dct_x_offset, dct_linesize_luma, row->blocks[7]);
562
563
12720
        if (!(ctx->avctx->flags & AV_CODEC_FLAG_GRAY)) {
564
12720
            dct_y_offset = interlaced_mb ? frame->linesize[1] : (dct_linesize_chroma << 3);
565
12720
            ctx->idsp.idct_put(dest_u,                               dct_linesize_chroma, row->blocks[2]);
566
12720
            ctx->idsp.idct_put(dest_u + dct_x_offset,                dct_linesize_chroma, row->blocks[3]);
567
12720
            ctx->idsp.idct_put(dest_u + dct_y_offset,                dct_linesize_chroma, row->blocks[8]);
568
12720
            ctx->idsp.idct_put(dest_u + dct_y_offset + dct_x_offset, dct_linesize_chroma, row->blocks[9]);
569
12720
            ctx->idsp.idct_put(dest_v,                               dct_linesize_chroma, row->blocks[4]);
570
12720
            ctx->idsp.idct_put(dest_v + dct_x_offset,                dct_linesize_chroma, row->blocks[5]);
571
12720
            ctx->idsp.idct_put(dest_v + dct_y_offset,                dct_linesize_chroma, row->blocks[10]);
572
12720
            ctx->idsp.idct_put(dest_v + dct_y_offset + dct_x_offset, dct_linesize_chroma, row->blocks[11]);
573
        }
574
    }
575
576
4336632
    return 0;
577
}
578
579
30173
static int dnxhd_decode_row(AVCodecContext *avctx, void *data,
580
                            int rownb, int threadnb)
581
{
582
30173
    const DNXHDContext *ctx = avctx->priv_data;
583
30173
    uint32_t offset = ctx->mb_scan_index[rownb];
584
30173
    RowContext *row = ctx->rows + threadnb;
585
    int x, ret;
586
587
30173
    row->last_dc[0] =
588
30173
    row->last_dc[1] =
589
30173
    row->last_dc[2] = 1 << (ctx->bit_depth + 2); // for levels +2^(bitdepth-1)
590
30173
    ret = init_get_bits8(&row->gb, ctx->buf + offset, ctx->buf_size - offset);
591
30173
    if (ret < 0) {
592
        row->errors++;
593
        return ret;
594
    }
595
4366805
    for (x = 0; x < ctx->mb_width; x++) {
596
4336632
        int ret = dnxhd_decode_macroblock(ctx, row, data, x, rownb);
597
4336632
        if (ret < 0) {
598
            row->errors++;
599
            return ret;
600
        }
601
    }
602
603
30173
    return 0;
604
}
605
606
435
static int dnxhd_decode_frame(AVCodecContext *avctx, void *data,
607
                              int *got_frame, AVPacket *avpkt)
608
{
609
435
    const uint8_t *buf = avpkt->data;
610
435
    int buf_size = avpkt->size;
611
435
    DNXHDContext *ctx = avctx->priv_data;
612
435
    ThreadFrame frame = { .f = data };
613
435
    AVFrame *picture = data;
614
435
    int first_field = 1;
615
    int ret, i;
616
617
    ff_dlog(avctx, "frame size %d\n", buf_size);
618
619
870
    for (i = 0; i < avctx->thread_count; i++)
620
435
        ctx->rows[i].format = -1;
621
622
435
decode_coding_unit:
623
502
    if ((ret = dnxhd_decode_header(ctx, picture, buf, buf_size, first_field)) < 0)
624
        return ret;
625
626

502
    if ((avctx->width || avctx->height) &&
627

456
        (ctx->width != avctx->width || ctx->height != avctx->height)) {
628
2
        av_log(avctx, AV_LOG_WARNING, "frame size changed: %dx%d -> %ux%u\n",
629
               avctx->width, avctx->height, ctx->width, ctx->height);
630
2
        first_field = 1;
631
    }
632

502
    if (avctx->pix_fmt != AV_PIX_FMT_NONE && avctx->pix_fmt != ctx->pix_fmt) {
633
        av_log(avctx, AV_LOG_WARNING, "pix_fmt changed: %s -> %s\n",
634
               av_get_pix_fmt_name(avctx->pix_fmt), av_get_pix_fmt_name(ctx->pix_fmt));
635
        first_field = 1;
636
    }
637
638
502
    avctx->pix_fmt = ctx->pix_fmt;
639
502
    ret = ff_set_dimensions(avctx, ctx->width, ctx->height);
640
502
    if (ret < 0)
641
        return ret;
642
643
502
    if (first_field) {
644
435
        if ((ret = ff_thread_get_buffer(avctx, &frame, 0)) < 0)
645
            return ret;
646
435
        picture->pict_type = AV_PICTURE_TYPE_I;
647
435
        picture->key_frame = 1;
648
    }
649
650
502
    ctx->buf_size = buf_size - ctx->data_offset;
651
502
    ctx->buf = buf + ctx->data_offset;
652
502
    avctx->execute2(avctx, dnxhd_decode_row, picture, NULL, ctx->mb_height);
653
654

502
    if (first_field && picture->interlaced_frame) {
655
67
        buf      += ctx->cid_table->coding_unit_size;
656
67
        buf_size -= ctx->cid_table->coding_unit_size;
657
67
        first_field = 0;
658
67
        goto decode_coding_unit;
659
    }
660
661
435
    ret = 0;
662
870
    for (i = 0; i < avctx->thread_count; i++) {
663
435
        ret += ctx->rows[i].errors;
664
435
        ctx->rows[i].errors = 0;
665
    }
666
667
435
    if (ctx->act) {
668
        static int act_warned;
669
2
        int format = ctx->rows[0].format;
670
2
        for (i = 1; i < avctx->thread_count; i++) {
671
            if (ctx->rows[i].format != format &&
672
                ctx->rows[i].format != -1 /* not run */) {
673
                format = 2;
674
                break;
675
            }
676
        }
677

2
        switch (format) {
678
        case -1:
679
        case 2:
680
            if (!act_warned) {
681
                act_warned = 1;
682
                av_log(ctx->avctx, AV_LOG_ERROR,
683
                       "Unsupported: variable ACT flag.\n");
684
            }
685
            break;
686
        case 0:
687
            ctx->pix_fmt = ctx->bit_depth==10
688
                         ? AV_PIX_FMT_GBRP10 : AV_PIX_FMT_GBRP12;
689
            break;
690
2
        case 1:
691
4
            ctx->pix_fmt = ctx->bit_depth==10
692
2
                         ? AV_PIX_FMT_YUV444P10 : AV_PIX_FMT_YUV444P12;
693
2
            break;
694
        }
695
433
    }
696
435
    avctx->pix_fmt = ctx->pix_fmt;
697
435
    if (ret) {
698
        av_log(ctx->avctx, AV_LOG_ERROR, "%d lines with errors\n", ret);
699
        return AVERROR_INVALIDDATA;
700
    }
701
702
435
    *got_frame = 1;
703
435
    return avpkt->size;
704
}
705
706
149
static av_cold int dnxhd_decode_close(AVCodecContext *avctx)
707
{
708
149
    DNXHDContext *ctx = avctx->priv_data;
709
710
149
    ff_free_vlc(&ctx->ac_vlc);
711
149
    ff_free_vlc(&ctx->dc_vlc);
712
149
    ff_free_vlc(&ctx->run_vlc);
713
714
149
    av_freep(&ctx->rows);
715
716
149
    return 0;
717
}
718
719
AVCodec ff_dnxhd_decoder = {
720
    .name           = "dnxhd",
721
    .long_name      = NULL_IF_CONFIG_SMALL("VC3/DNxHD"),
722
    .type           = AVMEDIA_TYPE_VIDEO,
723
    .id             = AV_CODEC_ID_DNXHD,
724
    .priv_data_size = sizeof(DNXHDContext),
725
    .init           = dnxhd_decode_init,
726
    .close          = dnxhd_decode_close,
727
    .decode         = dnxhd_decode_frame,
728
    .capabilities   = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_FRAME_THREADS |
729
                      AV_CODEC_CAP_SLICE_THREADS,
730
    .profiles       = NULL_IF_CONFIG_SMALL(ff_dnxhd_profiles),
731
};