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
7 * 10 bit support added by MirriAd Ltd, Joseph Artsimovich <joseph@mirriad.com>
8 * Slice multithreading and MB interlaced support added by Christophe Gisquet
10 * This file is part of FFmpeg.
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.
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.
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
27 #include "libavutil/imgutils.h"
28 #include "libavutil/mem_internal.h"
32 #define UNCHECKED_BITSTREAM_READER 1
34 #include "dnxhddata.h"
40 typedef struct RowContext {
41 DECLARE_ALIGNED(32, int16_t, blocks)[12][64];
48 /** -1:not set yet 0:off=RGB 1:on=YUV 2:variable */
52 typedef struct DNXHDContext {
53 AVCodecContext *avctx;
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;
68 const CIDEntry *cid_table;
69 int bit_depth; // 8, 10, 12 or 0 if not initialized at all.
75 int (*decode_dct_block)(const struct DNXHDContext *ctx,
76 RowContext *row, int n);
79 #define DNXHD_VLC_BITS 9
80 #define DNXHD_DC_VLC_BITS 7
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);
93 static av_cold int dnxhd_decode_init(AVCodecContext *avctx)
95 DNXHDContext *ctx = avctx->priv_data;
99 if (avctx->colorspace == AVCOL_SPC_UNSPECIFIED) {
100 avctx->colorspace = AVCOL_SPC_BT709;
103 avctx->coded_width = FFALIGN(avctx->width, 16);
104 avctx->coded_height = FFALIGN(avctx->height, 16);
106 ctx->rows = av_mallocz_array(avctx->thread_count, sizeof(RowContext));
108 return AVERROR(ENOMEM);
113 static int dnxhd_init_vlc(DNXHDContext *ctx, uint32_t cid, int bitdepth)
115 if (cid != ctx->cid) {
118 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);
122 if (ff_dnxhd_cid_table[index].bit_depth != bitdepth &&
123 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;
127 ctx->cid_table = &ff_dnxhd_cid_table[index];
128 av_log(ctx->avctx, AV_LOG_VERBOSE, "Profile cid %"PRIu32".\n", cid);
130 ff_free_vlc(&ctx->ac_vlc);
131 ff_free_vlc(&ctx->dc_vlc);
132 ff_free_vlc(&ctx->run_vlc);
134 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 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 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);
149 static int dnxhd_get_profile(int cid)
153 return FF_PROFILE_DNXHR_444;
155 return FF_PROFILE_DNXHR_HQX;
157 return FF_PROFILE_DNXHR_HQ;
159 return FF_PROFILE_DNXHR_SQ;
161 return FF_PROFILE_DNXHR_LB;
163 return FF_PROFILE_DNXHD;
166 static int dnxhd_decode_header(DNXHDContext *ctx, AVFrame *frame,
167 const uint8_t *buf, int buf_size,
171 int old_bit_depth = ctx->bit_depth, bitdepth;
172 uint64_t header_prefix;
173 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;
179 header_prefix = ff_dnxhd_parse_header_prefix(buf);
180 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;
186 if (buf[5] & 2) { /* interlaced */
187 ctx->cur_field = buf[5] & 1;
188 frame->interlaced_frame = 1;
189 frame->top_field_first = first_field ^ ctx->cur_field;
190 av_log(ctx->avctx, AV_LOG_DEBUG,
191 "interlaced %d, cur field %d\n", buf[5] & 3, ctx->cur_field);
195 ctx->mbaff = (buf[0x6] >> 5) & 1;
196 ctx->alpha = buf[0x7] & 1;
197 ctx->lla = (buf[0x7] >> 1) & 1;
199 avpriv_request_sample(ctx->avctx, "alpha");
201 ctx->height = AV_RB16(buf + 0x18);
202 ctx->width = AV_RB16(buf + 0x1a);
204 switch(buf[0x21] >> 5) {
205 case 1: bitdepth = 8; break;
206 case 2: bitdepth = 10; break;
207 case 3: bitdepth = 12; break;
209 av_log(ctx->avctx, AV_LOG_ERROR,
210 "Unknown bitdepth indicator (%d)\n", buf[0x21] >> 5);
211 return AVERROR_INVALIDDATA;
214 cid = AV_RB32(buf + 0x28);
216 ctx->avctx->profile = dnxhd_get_profile(cid);
218 if ((ret = dnxhd_init_vlc(ctx, cid, bitdepth)) < 0)
220 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");
224 switch ((buf[0x2C] >> 1) & 3) {
225 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;
231 ctx->act = buf[0x2C] & 1;
232 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");
236 ctx->is_444 = (buf[0x2C] >> 6) & 1;
239 avpriv_request_sample(ctx->avctx, "4:4:4 8 bits");
240 return AVERROR_INVALIDDATA;
241 } else if (bitdepth == 10) {
242 ctx->decode_dct_block = dnxhd_decode_dct_block_10_444;
243 ctx->pix_fmt = ctx->act ? AV_PIX_FMT_YUV444P10
246 ctx->decode_dct_block = dnxhd_decode_dct_block_12_444;
247 ctx->pix_fmt = ctx->act ? AV_PIX_FMT_YUV444P12
250 } else if (bitdepth == 12) {
251 ctx->decode_dct_block = dnxhd_decode_dct_block_12;
252 ctx->pix_fmt = AV_PIX_FMT_YUV422P12;
253 } else if (bitdepth == 10) {
254 if (ctx->avctx->profile == FF_PROFILE_DNXHR_HQX)
255 ctx->decode_dct_block = dnxhd_decode_dct_block_10_444;
257 ctx->decode_dct_block = dnxhd_decode_dct_block_10;
258 ctx->pix_fmt = AV_PIX_FMT_YUV422P10;
260 ctx->decode_dct_block = dnxhd_decode_dct_block_8;
261 ctx->pix_fmt = AV_PIX_FMT_YUV422P;
264 ctx->avctx->bits_per_raw_sample = ctx->bit_depth = bitdepth;
265 if (ctx->bit_depth != old_bit_depth) {
266 ff_blockdsp_init(&ctx->bdsp, ctx->avctx);
267 ff_idctdsp_init(&ctx->idsp, ctx->avctx);
268 ff_init_scantable(ctx->idsp.idct_permutation, &ctx->scantable,
272 // make sure profile size constraints are respected
273 // DNx100 allows 1920->1440 and 1280->960 subsampling
274 if (ctx->width != ctx->cid_table->width &&
275 ctx->cid_table->width != DNXHD_VARIABLE) {
276 av_reduce(&ctx->avctx->sample_aspect_ratio.num,
277 &ctx->avctx->sample_aspect_ratio.den,
278 ctx->width, ctx->cid_table->width, 255);
279 ctx->width = ctx->cid_table->width;
282 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;
288 ctx->mb_width = (ctx->width + 15)>> 4;
289 ctx->mb_height = AV_RB16(buf + 0x16c);
291 if ((ctx->height + 15) >> 4 == ctx->mb_height && frame->interlaced_frame)
294 av_log(ctx->avctx, AV_LOG_VERBOSE, "%dx%d, 4:%s %d bits, MBAFF=%d ACT=%d\n",
295 ctx->width, ctx->height, ctx->is_444 ? "4:4" : "2:2",
296 ctx->bit_depth, ctx->mbaff, ctx->act);
298 // Newer format supports variable mb_scan_index sizes
299 if (ctx->mb_height > 68 && ff_dnxhd_check_header_prefix_hr(header_prefix)) {
300 ctx->data_offset = 0x170 + (ctx->mb_height << 2);
302 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;
307 ctx->data_offset = 0x280;
309 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;
315 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;
321 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;
327 for (i = 0; i < ctx->mb_height; i++) {
328 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 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;
342 static av_always_inline int dnxhd_decode_dct_block(const DNXHDContext *ctx,
350 int i, j, index1, index2, len, flags;
351 int level, component, sign;
353 const uint8_t *weight_matrix;
354 const uint8_t *ac_info = ctx->cid_table->ac_info;
355 int16_t *block = row->blocks[n];
356 const int eob_index = ctx->cid_table->eob_index;
358 OPEN_READER(bs, &row->gb);
360 ctx->bdsp.clear_block(block);
364 component = 1 + (n & 1);
365 scale = row->chroma_scale;
366 weight_matrix = ctx->cid_table->chroma_weight;
369 scale = row->luma_scale;
370 weight_matrix = ctx->cid_table->luma_weight;
373 component = (n >> 1) % 3;
375 scale = row->chroma_scale;
376 weight_matrix = ctx->cid_table->chroma_weight;
378 scale = row->luma_scale;
379 weight_matrix = ctx->cid_table->luma_weight;
383 UPDATE_CACHE(bs, &row->gb);
384 GET_VLC(len, bs, &row->gb, ctx->dc_vlc.table, DNXHD_DC_VLC_BITS, 1);
390 level = GET_CACHE(bs, &row->gb);
391 LAST_SKIP_BITS(bs, &row->gb, len);
393 level = (NEG_USR32(sign ^ level, len) ^ sign) - sign;
394 row->last_dc[component] += level * (1 << dc_shift);
396 block[0] = row->last_dc[component];
400 UPDATE_CACHE(bs, &row->gb);
401 GET_VLC(index1, bs, &row->gb, ctx->ac_vlc.table,
404 while (index1 != eob_index) {
405 level = ac_info[2*index1+0];
406 flags = ac_info[2*index1+1];
408 sign = SHOW_SBITS(bs, &row->gb, 1);
409 SKIP_BITS(bs, &row->gb, 1);
412 level += SHOW_UBITS(bs, &row->gb, index_bits) << 7;
413 SKIP_BITS(bs, &row->gb, index_bits);
417 UPDATE_CACHE(bs, &row->gb);
418 GET_VLC(index2, bs, &row->gb, ctx->run_vlc.table,
420 i += ctx->cid_table->run[index2];
424 av_log(ctx->avctx, AV_LOG_ERROR, "ac tex damaged %d, %d\n", n, i);
429 j = ctx->scantable.permutated[i];
431 level += scale[i] >> 1;
432 if (level_bias < 32 || weight_matrix[i] != level_bias)
433 level += level_bias; // 1<<(level_shift-1)
434 level >>= level_shift;
436 block[j] = (level ^ sign) - sign;
438 UPDATE_CACHE(bs, &row->gb);
439 GET_VLC(index1, bs, &row->gb, ctx->ac_vlc.table,
443 CLOSE_READER(bs, &row->gb);
447 static int dnxhd_decode_dct_block_8(const DNXHDContext *ctx,
448 RowContext *row, int n)
450 return dnxhd_decode_dct_block(ctx, row, n, 4, 32, 6, 0);
453 static int dnxhd_decode_dct_block_10(const DNXHDContext *ctx,
454 RowContext *row, int n)
456 return dnxhd_decode_dct_block(ctx, row, n, 6, 8, 4, 0);
459 static int dnxhd_decode_dct_block_10_444(const DNXHDContext *ctx,
460 RowContext *row, int n)
462 return dnxhd_decode_dct_block(ctx, row, n, 6, 32, 6, 0);
465 static int dnxhd_decode_dct_block_12(const DNXHDContext *ctx,
466 RowContext *row, int n)
468 return dnxhd_decode_dct_block(ctx, row, n, 6, 8, 4, 2);
471 static int dnxhd_decode_dct_block_12_444(const DNXHDContext *ctx,
472 RowContext *row, int n)
474 return dnxhd_decode_dct_block(ctx, row, n, 6, 32, 4, 2);
477 static int dnxhd_decode_macroblock(const DNXHDContext *ctx, RowContext *row,
478 AVFrame *frame, int x, int y)
480 int shift1 = ctx->bit_depth >= 10;
481 int dct_linesize_luma = frame->linesize[0];
482 int dct_linesize_chroma = frame->linesize[1];
483 uint8_t *dest_y, *dest_u, *dest_v;
484 int dct_y_offset, dct_x_offset;
486 int interlaced_mb = 0;
489 interlaced_mb = get_bits1(&row->gb);
490 qscale = get_bits(&row->gb, 10);
492 qscale = get_bits(&row->gb, 11);
494 act = get_bits1(&row->gb);
497 static int act_warned;
500 av_log(ctx->avctx, AV_LOG_ERROR,
501 "ACT flag set, in violation of frame header.\n");
503 } else if (row->format == -1) {
505 } else if (row->format != act) {
506 row->format = 2; // Variable
510 if (qscale != row->last_qscale) {
511 for (i = 0; i < 64; i++) {
512 row->luma_scale[i] = qscale * ctx->cid_table->luma_weight[i];
513 row->chroma_scale[i] = qscale * ctx->cid_table->chroma_weight[i];
515 row->last_qscale = qscale;
518 for (i = 0; i < 8 + 4 * ctx->is_444; i++) {
519 if (ctx->decode_dct_block(ctx, row, i) < 0)
520 return AVERROR_INVALIDDATA;
523 if (frame->interlaced_frame) {
524 dct_linesize_luma <<= 1;
525 dct_linesize_chroma <<= 1;
528 dest_y = frame->data[0] + ((y * dct_linesize_luma) << 4) + (x << (4 + shift1));
529 dest_u = frame->data[1] + ((y * dct_linesize_chroma) << 4) + (x << (3 + shift1 + ctx->is_444));
530 dest_v = frame->data[2] + ((y * dct_linesize_chroma) << 4) + (x << (3 + shift1 + ctx->is_444));
532 if (frame->interlaced_frame && ctx->cur_field) {
533 dest_y += frame->linesize[0];
534 dest_u += frame->linesize[1];
535 dest_v += frame->linesize[2];
538 dct_linesize_luma <<= 1;
539 dct_linesize_chroma <<= 1;
542 dct_y_offset = interlaced_mb ? frame->linesize[0] : (dct_linesize_luma << 3);
543 dct_x_offset = 8 << shift1;
545 ctx->idsp.idct_put(dest_y, dct_linesize_luma, row->blocks[0]);
546 ctx->idsp.idct_put(dest_y + dct_x_offset, dct_linesize_luma, row->blocks[1]);
547 ctx->idsp.idct_put(dest_y + dct_y_offset, dct_linesize_luma, row->blocks[4]);
548 ctx->idsp.idct_put(dest_y + dct_y_offset + dct_x_offset, dct_linesize_luma, row->blocks[5]);
550 if (!(ctx->avctx->flags & AV_CODEC_FLAG_GRAY)) {
551 dct_y_offset = interlaced_mb ? frame->linesize[1] : (dct_linesize_chroma << 3);
552 ctx->idsp.idct_put(dest_u, dct_linesize_chroma, row->blocks[2]);
553 ctx->idsp.idct_put(dest_v, dct_linesize_chroma, row->blocks[3]);
554 ctx->idsp.idct_put(dest_u + dct_y_offset, dct_linesize_chroma, row->blocks[6]);
555 ctx->idsp.idct_put(dest_v + dct_y_offset, dct_linesize_chroma, row->blocks[7]);
558 ctx->idsp.idct_put(dest_y, dct_linesize_luma, row->blocks[0]);
559 ctx->idsp.idct_put(dest_y + dct_x_offset, dct_linesize_luma, row->blocks[1]);
560 ctx->idsp.idct_put(dest_y + dct_y_offset, dct_linesize_luma, row->blocks[6]);
561 ctx->idsp.idct_put(dest_y + dct_y_offset + dct_x_offset, dct_linesize_luma, row->blocks[7]);
563 if (!(ctx->avctx->flags & AV_CODEC_FLAG_GRAY)) {
564 dct_y_offset = interlaced_mb ? frame->linesize[1] : (dct_linesize_chroma << 3);
565 ctx->idsp.idct_put(dest_u, dct_linesize_chroma, row->blocks[2]);
566 ctx->idsp.idct_put(dest_u + dct_x_offset, dct_linesize_chroma, row->blocks[3]);
567 ctx->idsp.idct_put(dest_u + dct_y_offset, dct_linesize_chroma, row->blocks[8]);
568 ctx->idsp.idct_put(dest_u + dct_y_offset + dct_x_offset, dct_linesize_chroma, row->blocks[9]);
569 ctx->idsp.idct_put(dest_v, dct_linesize_chroma, row->blocks[4]);
570 ctx->idsp.idct_put(dest_v + dct_x_offset, dct_linesize_chroma, row->blocks[5]);
571 ctx->idsp.idct_put(dest_v + dct_y_offset, dct_linesize_chroma, row->blocks[10]);
572 ctx->idsp.idct_put(dest_v + dct_y_offset + dct_x_offset, dct_linesize_chroma, row->blocks[11]);
579 static int dnxhd_decode_row(AVCodecContext *avctx, void *data,
580 int rownb, int threadnb)
582 const DNXHDContext *ctx = avctx->priv_data;
583 uint32_t offset = ctx->mb_scan_index[rownb];
584 RowContext *row = ctx->rows + threadnb;
589 row->last_dc[2] = 1 << (ctx->bit_depth + 2); // for levels +2^(bitdepth-1)
590 ret = init_get_bits8(&row->gb, ctx->buf + offset, ctx->buf_size - offset);
595 for (x = 0; x < ctx->mb_width; x++) {
596 int ret = dnxhd_decode_macroblock(ctx, row, data, x, rownb);
606 static int dnxhd_decode_frame(AVCodecContext *avctx, void *data,
607 int *got_frame, AVPacket *avpkt)
609 const uint8_t *buf = avpkt->data;
610 int buf_size = avpkt->size;
611 DNXHDContext *ctx = avctx->priv_data;
612 ThreadFrame frame = { .f = data };
613 AVFrame *picture = data;
617 ff_dlog(avctx, "frame size %d\n", buf_size);
619 for (i = 0; i < avctx->thread_count; i++)
620 ctx->rows[i].format = -1;
623 if ((ret = dnxhd_decode_header(ctx, picture, buf, buf_size, first_field)) < 0)
626 if ((avctx->width || avctx->height) &&
627 (ctx->width != avctx->width || ctx->height != avctx->height)) {
628 av_log(avctx, AV_LOG_WARNING, "frame size changed: %dx%d -> %ux%u\n",
629 avctx->width, avctx->height, ctx->width, ctx->height);
632 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));
638 avctx->pix_fmt = ctx->pix_fmt;
639 ret = ff_set_dimensions(avctx, ctx->width, ctx->height);
644 if ((ret = ff_thread_get_buffer(avctx, &frame, 0)) < 0)
646 picture->pict_type = AV_PICTURE_TYPE_I;
647 picture->key_frame = 1;
650 ctx->buf_size = buf_size - ctx->data_offset;
651 ctx->buf = buf + ctx->data_offset;
652 avctx->execute2(avctx, dnxhd_decode_row, picture, NULL, ctx->mb_height);
654 if (first_field && picture->interlaced_frame) {
655 buf += ctx->cid_table->coding_unit_size;
656 buf_size -= ctx->cid_table->coding_unit_size;
658 goto decode_coding_unit;
662 for (i = 0; i < avctx->thread_count; i++) {
663 ret += ctx->rows[i].errors;
664 ctx->rows[i].errors = 0;
668 static int act_warned;
669 int format = ctx->rows[0].format;
670 for (i = 1; i < avctx->thread_count; i++) {
671 if (ctx->rows[i].format != format &&
672 ctx->rows[i].format != -1 /* not run */) {
682 av_log(ctx->avctx, AV_LOG_ERROR,
683 "Unsupported: variable ACT flag.\n");
687 ctx->pix_fmt = ctx->bit_depth==10
688 ? AV_PIX_FMT_GBRP10 : AV_PIX_FMT_GBRP12;
691 ctx->pix_fmt = ctx->bit_depth==10
692 ? AV_PIX_FMT_YUV444P10 : AV_PIX_FMT_YUV444P12;
696 avctx->pix_fmt = ctx->pix_fmt;
698 av_log(ctx->avctx, AV_LOG_ERROR, "%d lines with errors\n", ret);
699 return AVERROR_INVALIDDATA;
706 static av_cold int dnxhd_decode_close(AVCodecContext *avctx)
708 DNXHDContext *ctx = avctx->priv_data;
710 ff_free_vlc(&ctx->ac_vlc);
711 ff_free_vlc(&ctx->dc_vlc);
712 ff_free_vlc(&ctx->run_vlc);
714 av_freep(&ctx->rows);
719 AVCodec ff_dnxhd_decoder = {
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),