LCOV - code coverage report
Current view: top level - libavcodec - dnxhddec.c (source / functions) Hit Total Coverage
Test: coverage.info Lines: 305 384 79.4 %
Date: 2018-05-20 11:54:08 Functions: 13 15 86.7 %

          Line data    Source code
       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/timer.h"
      29             : #include "avcodec.h"
      30             : #include "blockdsp.h"
      31             : #define  UNCHECKED_BITSTREAM_READER 1
      32             : #include "get_bits.h"
      33             : #include "dnxhddata.h"
      34             : #include "idctdsp.h"
      35             : #include "internal.h"
      36             : #include "profiles.h"
      37             : #include "thread.h"
      38             : 
      39             : typedef struct RowContext {
      40             :     DECLARE_ALIGNED(16, int16_t, blocks)[12][64];
      41             :     int luma_scale[64];
      42             :     int chroma_scale[64];
      43             :     GetBitContext gb;
      44             :     int last_dc[3];
      45             :     int last_qscale;
      46             :     int errors;
      47             :     /** -1:not set yet  0:off=RGB  1:on=YUV  2:variable */
      48             :     int format;
      49             : } RowContext;
      50             : 
      51             : typedef struct DNXHDContext {
      52             :     AVCodecContext *avctx;
      53             :     RowContext *rows;
      54             :     BlockDSPContext bdsp;
      55             :     const uint8_t* buf;
      56             :     int buf_size;
      57             :     int64_t cid;                        ///< compression id
      58             :     unsigned int width, height;
      59             :     enum AVPixelFormat pix_fmt;
      60             :     unsigned int mb_width, mb_height;
      61             :     uint32_t mb_scan_index[512];
      62             :     int data_offset;                    // End of mb_scan_index, where macroblocks start
      63             :     int cur_field;                      ///< current interlaced field
      64             :     VLC ac_vlc, dc_vlc, run_vlc;
      65             :     IDCTDSPContext idsp;
      66             :     ScanTable scantable;
      67             :     const CIDEntry *cid_table;
      68             :     int bit_depth; // 8, 10, 12 or 0 if not initialized at all.
      69             :     int is_444;
      70             :     int mbaff;
      71             :     int act;
      72             :     int (*decode_dct_block)(const struct DNXHDContext *ctx,
      73             :                             RowContext *row, int n);
      74             : } DNXHDContext;
      75             : 
      76             : #define DNXHD_VLC_BITS 9
      77             : #define DNXHD_DC_VLC_BITS 7
      78             : 
      79             : static int dnxhd_decode_dct_block_8(const DNXHDContext *ctx,
      80             :                                     RowContext *row, int n);
      81             : static int dnxhd_decode_dct_block_10(const DNXHDContext *ctx,
      82             :                                      RowContext *row, int n);
      83             : static int dnxhd_decode_dct_block_10_444(const DNXHDContext *ctx,
      84             :                                          RowContext *row, int n);
      85             : static int dnxhd_decode_dct_block_12(const DNXHDContext *ctx,
      86             :                                      RowContext *row, int n);
      87             : static int dnxhd_decode_dct_block_12_444(const DNXHDContext *ctx,
      88             :                                          RowContext *row, int n);
      89             : 
      90         149 : static av_cold int dnxhd_decode_init(AVCodecContext *avctx)
      91             : {
      92         149 :     DNXHDContext *ctx = avctx->priv_data;
      93             : 
      94         149 :     ctx->avctx = avctx;
      95         149 :     ctx->cid = -1;
      96         149 :     if (avctx->colorspace == AVCOL_SPC_UNSPECIFIED) {
      97          73 :         avctx->colorspace = AVCOL_SPC_BT709;
      98             :     }
      99             : 
     100         149 :     avctx->coded_width  = FFALIGN(avctx->width,  16);
     101         149 :     avctx->coded_height = FFALIGN(avctx->height, 16);
     102             : 
     103         149 :     ctx->rows = av_mallocz_array(avctx->thread_count, sizeof(RowContext));
     104         149 :     if (!ctx->rows)
     105           0 :         return AVERROR(ENOMEM);
     106             : 
     107         149 :     return 0;
     108             : }
     109             : 
     110         502 : static int dnxhd_init_vlc(DNXHDContext *ctx, uint32_t cid, int bitdepth)
     111             : {
     112         502 :     if (cid != ctx->cid) {
     113             :         int index;
     114             : 
     115         148 :         if ((index = ff_dnxhd_get_cid_table(cid)) < 0) {
     116           0 :             av_log(ctx->avctx, AV_LOG_ERROR, "unsupported cid %"PRIu32"\n", cid);
     117           0 :             return AVERROR(ENOSYS);
     118             :         }
     119         152 :         if (ff_dnxhd_cid_table[index].bit_depth != bitdepth &&
     120           4 :             ff_dnxhd_cid_table[index].bit_depth != DNXHD_VARIABLE) {
     121           0 :             av_log(ctx->avctx, AV_LOG_ERROR, "bit depth mismatches %d %d\n", ff_dnxhd_cid_table[index].bit_depth, bitdepth);
     122           0 :             return AVERROR_INVALIDDATA;
     123             :         }
     124         148 :         ctx->cid_table = &ff_dnxhd_cid_table[index];
     125         148 :         av_log(ctx->avctx, AV_LOG_VERBOSE, "Profile cid %"PRIu32".\n", cid);
     126             : 
     127         148 :         ff_free_vlc(&ctx->ac_vlc);
     128         148 :         ff_free_vlc(&ctx->dc_vlc);
     129         148 :         ff_free_vlc(&ctx->run_vlc);
     130             : 
     131         148 :         init_vlc(&ctx->ac_vlc, DNXHD_VLC_BITS, 257,
     132             :                  ctx->cid_table->ac_bits, 1, 1,
     133             :                  ctx->cid_table->ac_codes, 2, 2, 0);
     134         148 :         init_vlc(&ctx->dc_vlc, DNXHD_DC_VLC_BITS, bitdepth > 8 ? 14 : 12,
     135             :                  ctx->cid_table->dc_bits, 1, 1,
     136             :                  ctx->cid_table->dc_codes, 1, 1, 0);
     137         148 :         init_vlc(&ctx->run_vlc, DNXHD_VLC_BITS, 62,
     138             :                  ctx->cid_table->run_bits, 1, 1,
     139             :                  ctx->cid_table->run_codes, 2, 2, 0);
     140             : 
     141         148 :         ctx->cid = cid;
     142             :     }
     143         502 :     return 0;
     144             : }
     145             : 
     146           0 : static av_cold int dnxhd_decode_init_thread_copy(AVCodecContext *avctx)
     147             : {
     148           0 :     DNXHDContext *ctx = avctx->priv_data;
     149             : 
     150           0 :     ctx->avctx = avctx;
     151             :     // make sure VLC tables will be loaded when cid is parsed
     152           0 :     ctx->cid = -1;
     153             : 
     154           0 :     ctx->rows = av_mallocz_array(avctx->thread_count, sizeof(RowContext));
     155           0 :     if (!ctx->rows)
     156           0 :         return AVERROR(ENOMEM);
     157             : 
     158           0 :     return 0;
     159             : }
     160             : 
     161         502 : static int dnxhd_get_profile(int cid)
     162             : {
     163         502 :     switch(cid) {
     164           2 :     case 1270:
     165           2 :         return FF_PROFILE_DNXHR_444;
     166           2 :     case 1271:
     167           2 :         return FF_PROFILE_DNXHR_HQX;
     168         120 :     case 1272:
     169         120 :         return FF_PROFILE_DNXHR_HQ;
     170          48 :     case 1273:
     171          48 :         return FF_PROFILE_DNXHR_SQ;
     172         111 :     case 1274:
     173         111 :         return FF_PROFILE_DNXHR_LB;
     174             :     }
     175         219 :     return FF_PROFILE_DNXHD;
     176             : }
     177             : 
     178         502 : static int dnxhd_decode_header(DNXHDContext *ctx, AVFrame *frame,
     179             :                                const uint8_t *buf, int buf_size,
     180             :                                int first_field)
     181             : {
     182             :     int i, cid, ret;
     183         502 :     int old_bit_depth = ctx->bit_depth, bitdepth;
     184             :     uint64_t header_prefix;
     185         502 :     if (buf_size < 0x280) {
     186           0 :         av_log(ctx->avctx, AV_LOG_ERROR,
     187             :                "buffer too small (%d < 640).\n", buf_size);
     188           0 :         return AVERROR_INVALIDDATA;
     189             :     }
     190             : 
     191         502 :     header_prefix = ff_dnxhd_parse_header_prefix(buf);
     192         502 :     if (header_prefix == 0) {
     193           0 :         av_log(ctx->avctx, AV_LOG_ERROR,
     194             :                "unknown header 0x%02X 0x%02X 0x%02X 0x%02X 0x%02X\n",
     195           0 :                buf[0], buf[1], buf[2], buf[3], buf[4]);
     196           0 :         return AVERROR_INVALIDDATA;
     197             :     }
     198         502 :     if (buf[5] & 2) { /* interlaced */
     199         134 :         ctx->cur_field = buf[5] & 1;
     200         134 :         frame->interlaced_frame = 1;
     201         134 :         frame->top_field_first  = first_field ^ ctx->cur_field;
     202         268 :         av_log(ctx->avctx, AV_LOG_DEBUG,
     203         134 :                "interlaced %d, cur field %d\n", buf[5] & 3, ctx->cur_field);
     204             :     } else {
     205         368 :         ctx->cur_field = 0;
     206             :     }
     207         502 :     ctx->mbaff = (buf[0x6] >> 5) & 1;
     208             : 
     209         502 :     ctx->height = AV_RB16(buf + 0x18);
     210         502 :     ctx->width  = AV_RB16(buf + 0x1a);
     211             : 
     212         502 :     switch(buf[0x21] >> 5) {
     213         432 :     case 1: bitdepth = 8; break;
     214          68 :     case 2: bitdepth = 10; break;
     215           2 :     case 3: bitdepth = 12; break;
     216           0 :     default:
     217           0 :         av_log(ctx->avctx, AV_LOG_ERROR,
     218           0 :                "Unknown bitdepth indicator (%d)\n", buf[0x21] >> 5);
     219           0 :         return AVERROR_INVALIDDATA;
     220             :     }
     221             : 
     222         502 :     cid = AV_RB32(buf + 0x28);
     223             : 
     224         502 :     ctx->avctx->profile = dnxhd_get_profile(cid);
     225             : 
     226         502 :     if ((ret = dnxhd_init_vlc(ctx, cid, bitdepth)) < 0)
     227           0 :         return ret;
     228         502 :     if (ctx->mbaff && ctx->cid_table->cid != 1260)
     229           0 :         av_log(ctx->avctx, AV_LOG_WARNING,
     230             :                "Adaptive MB interlace flag in an unsupported profile.\n");
     231             : 
     232         502 :     ctx->act = buf[0x2C] & 7;
     233         502 :     if (ctx->act && ctx->cid_table->cid != 1256 && ctx->cid_table->cid != 1270)
     234           0 :         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           0 :             avpriv_request_sample(ctx->avctx, "4:4:4 8 bits");
     241           0 :             return AVERROR_INVALIDDATA;
     242           2 :         } else if (bitdepth == 10) {
     243           2 :             ctx->decode_dct_block = dnxhd_decode_dct_block_10_444;
     244           4 :             ctx->pix_fmt = ctx->act ? AV_PIX_FMT_YUV444P10
     245           2 :                                     : AV_PIX_FMT_GBRP10;
     246             :         } else {
     247           0 :             ctx->decode_dct_block = dnxhd_decode_dct_block_12_444;
     248           0 :             ctx->pix_fmt = ctx->act ? AV_PIX_FMT_YUV444P12
     249           0 :                                     : 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           0 :             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         787 :     if (ctx->width != ctx->cid_table->width &&
     276         285 :         ctx->cid_table->width != DNXHD_VARIABLE) {
     277           6 :         av_reduce(&ctx->avctx->sample_aspect_ratio.num,
     278           2 :                   &ctx->avctx->sample_aspect_ratio.den,
     279           4 :                   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           0 :         av_log(ctx->avctx, AV_LOG_ERROR, "incorrect frame size (%d < %u).\n",
     285           0 :                buf_size, ctx->cid_table->coding_unit_size);
     286           0 :         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        1004 :     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           0 :             av_log(ctx->avctx, AV_LOG_ERROR,
     305             :                    "mb height too big: %d\n", ctx->mb_height);
     306           0 :             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           0 :         av_log(ctx->avctx, AV_LOG_ERROR,
     312             :                 "mb height too big: %d\n", ctx->mb_height);
     313           0 :         return AVERROR_INVALIDDATA;
     314             :     }
     315             : 
     316         502 :     if (buf_size < ctx->data_offset) {
     317           0 :         av_log(ctx->avctx, AV_LOG_ERROR,
     318             :                "buffer too small (%d < %d).\n", buf_size, ctx->data_offset);
     319           0 :         return AVERROR_INVALIDDATA;
     320             :     }
     321             : 
     322         502 :     if (ctx->mb_height > FF_ARRAY_ELEMS(ctx->mb_scan_index)) {
     323           0 :         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           0 :         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           0 :             av_log(ctx->avctx, AV_LOG_ERROR,
     334             :                    "invalid mb scan index (%"PRIu32" vs %u).\n",
     335           0 :                    ctx->mb_scan_index[i], buf_size - ctx->data_offset);
     336           0 :             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           0 :         ret = len;
     388           0 :         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   211682862 :     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           0 :             av_log(ctx->avctx, AV_LOG_ERROR, "ac tex damaged %d, %d\n", n, i);
     426           0 :             ret = -1;
     427           0 :             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           0 : static int dnxhd_decode_dct_block_12_444(const DNXHDContext *ctx,
     473             :                                          RowContext *row, int n)
     474             : {
     475           0 :     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           0 :             if (!act_warned) {
     500           0 :                 act_warned = 1;
     501           0 :                 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           0 :             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           0 :             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;
     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 :     init_get_bits(&row->gb, ctx->buf + offset, (ctx->buf_size - offset) << 3);
     592     4366805 :     for (x = 0; x < ctx->mb_width; x++) {
     593             :         //START_TIMER;
     594     4336632 :         int ret = dnxhd_decode_macroblock(ctx, row, data, x, rownb);
     595     4336632 :         if (ret < 0) {
     596           0 :             row->errors++;
     597           0 :             return ret;
     598             :         }
     599             :         //STOP_TIMER("decode macroblock");
     600             :     }
     601             : 
     602       30173 :     return 0;
     603             : }
     604             : 
     605         435 : static int dnxhd_decode_frame(AVCodecContext *avctx, void *data,
     606             :                               int *got_frame, AVPacket *avpkt)
     607             : {
     608         435 :     const uint8_t *buf = avpkt->data;
     609         435 :     int buf_size = avpkt->size;
     610         435 :     DNXHDContext *ctx = avctx->priv_data;
     611         435 :     ThreadFrame frame = { .f = data };
     612         435 :     AVFrame *picture = data;
     613         435 :     int first_field = 1;
     614             :     int ret, i;
     615             : 
     616             :     ff_dlog(avctx, "frame size %d\n", buf_size);
     617             : 
     618         870 :     for (i = 0; i < avctx->thread_count; i++)
     619         435 :         ctx->rows[i].format = -1;
     620             : 
     621         435 : decode_coding_unit:
     622         502 :     if ((ret = dnxhd_decode_header(ctx, picture, buf, buf_size, first_field)) < 0)
     623           0 :         return ret;
     624             : 
     625         958 :     if ((avctx->width || avctx->height) &&
     626         912 :         (ctx->width != avctx->width || ctx->height != avctx->height)) {
     627           2 :         av_log(avctx, AV_LOG_WARNING, "frame size changed: %dx%d -> %ux%u\n",
     628             :                avctx->width, avctx->height, ctx->width, ctx->height);
     629           2 :         first_field = 1;
     630             :     }
     631         502 :     if (avctx->pix_fmt != AV_PIX_FMT_NONE && avctx->pix_fmt != ctx->pix_fmt) {
     632           0 :         av_log(avctx, AV_LOG_WARNING, "pix_fmt changed: %s -> %s\n",
     633             :                av_get_pix_fmt_name(avctx->pix_fmt), av_get_pix_fmt_name(ctx->pix_fmt));
     634           0 :         first_field = 1;
     635             :     }
     636             : 
     637         502 :     avctx->pix_fmt = ctx->pix_fmt;
     638         502 :     ret = ff_set_dimensions(avctx, ctx->width, ctx->height);
     639         502 :     if (ret < 0)
     640           0 :         return ret;
     641             : 
     642         502 :     if (first_field) {
     643         435 :         if ((ret = ff_thread_get_buffer(avctx, &frame, 0)) < 0)
     644           0 :             return ret;
     645         435 :         picture->pict_type = AV_PICTURE_TYPE_I;
     646         435 :         picture->key_frame = 1;
     647             :     }
     648             : 
     649         502 :     ctx->buf_size = buf_size - ctx->data_offset;
     650         502 :     ctx->buf = buf + ctx->data_offset;
     651         502 :     avctx->execute2(avctx, dnxhd_decode_row, picture, NULL, ctx->mb_height);
     652             : 
     653         502 :     if (first_field && picture->interlaced_frame) {
     654          67 :         buf      += ctx->cid_table->coding_unit_size;
     655          67 :         buf_size -= ctx->cid_table->coding_unit_size;
     656          67 :         first_field = 0;
     657          67 :         goto decode_coding_unit;
     658             :     }
     659             : 
     660         435 :     ret = 0;
     661         870 :     for (i = 0; i < avctx->thread_count; i++) {
     662         435 :         ret += ctx->rows[i].errors;
     663         435 :         ctx->rows[i].errors = 0;
     664             :     }
     665             : 
     666         435 :     if (ctx->act) {
     667             :         static int act_warned;
     668           2 :         int format = ctx->rows[0].format;
     669           2 :         for (i = 1; i < avctx->thread_count; i++) {
     670           0 :             if (ctx->rows[i].format != format &&
     671           0 :                 ctx->rows[i].format != -1 /* not run */) {
     672           0 :                 format = 2;
     673           0 :                 break;
     674             :             }
     675             :         }
     676           2 :         switch (format) {
     677           0 :         case -1:
     678             :         case 2:
     679           0 :             if (!act_warned) {
     680           0 :                 act_warned = 1;
     681           0 :                 av_log(ctx->avctx, AV_LOG_ERROR,
     682             :                        "Unsupported: variable ACT flag.\n");
     683             :             }
     684           0 :             break;
     685           0 :         case 0:
     686           0 :             ctx->pix_fmt = ctx->bit_depth==10
     687           0 :                          ? AV_PIX_FMT_GBRP10 : AV_PIX_FMT_GBRP12;
     688           0 :             break;
     689           2 :         case 1:
     690           4 :             ctx->pix_fmt = ctx->bit_depth==10
     691           2 :                          ? AV_PIX_FMT_YUV444P10 : AV_PIX_FMT_YUV444P12;
     692           2 :             break;
     693             :         }
     694             :     }
     695         435 :     avctx->pix_fmt = ctx->pix_fmt;
     696         435 :     if (ret) {
     697           0 :         av_log(ctx->avctx, AV_LOG_ERROR, "%d lines with errors\n", ret);
     698           0 :         return AVERROR_INVALIDDATA;
     699             :     }
     700             : 
     701         435 :     *got_frame = 1;
     702         435 :     return avpkt->size;
     703             : }
     704             : 
     705         149 : static av_cold int dnxhd_decode_close(AVCodecContext *avctx)
     706             : {
     707         149 :     DNXHDContext *ctx = avctx->priv_data;
     708             : 
     709         149 :     ff_free_vlc(&ctx->ac_vlc);
     710         149 :     ff_free_vlc(&ctx->dc_vlc);
     711         149 :     ff_free_vlc(&ctx->run_vlc);
     712             : 
     713         149 :     av_freep(&ctx->rows);
     714             : 
     715         149 :     return 0;
     716             : }
     717             : 
     718             : AVCodec ff_dnxhd_decoder = {
     719             :     .name           = "dnxhd",
     720             :     .long_name      = NULL_IF_CONFIG_SMALL("VC3/DNxHD"),
     721             :     .type           = AVMEDIA_TYPE_VIDEO,
     722             :     .id             = AV_CODEC_ID_DNXHD,
     723             :     .priv_data_size = sizeof(DNXHDContext),
     724             :     .init           = dnxhd_decode_init,
     725             :     .close          = dnxhd_decode_close,
     726             :     .decode         = dnxhd_decode_frame,
     727             :     .capabilities   = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_FRAME_THREADS |
     728             :                       AV_CODEC_CAP_SLICE_THREADS,
     729             :     .init_thread_copy = ONLY_IF_THREADS_ENABLED(dnxhd_decode_init_thread_copy),
     730             :     .profiles       = NULL_IF_CONFIG_SMALL(ff_dnxhd_profiles),
     731             : };

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