LCOV - code coverage report
Current view: top level - libavcodec - indeo4.c (source / functions) Hit Total Coverage
Test: coverage.info Lines: 238 340 70.0 %
Date: 2017-12-17 23:02:56 Functions: 7 8 87.5 %

          Line data    Source code
       1             : /*
       2             :  * Indeo Video Interactive v4 compatible decoder
       3             :  * Copyright (c) 2009-2011 Maxim Poliakovski
       4             :  *
       5             :  * This file is part of FFmpeg.
       6             :  *
       7             :  * FFmpeg is free software; you can redistribute it and/or
       8             :  * modify it under the terms of the GNU Lesser General Public
       9             :  * License as published by the Free Software Foundation; either
      10             :  * version 2.1 of the License, or (at your option) any later version.
      11             :  *
      12             :  * FFmpeg is distributed in the hope that it will be useful,
      13             :  * but WITHOUT ANY WARRANTY; without even the implied warranty of
      14             :  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
      15             :  * Lesser General Public License for more details.
      16             :  *
      17             :  * You should have received a copy of the GNU Lesser General Public
      18             :  * License along with FFmpeg; if not, write to the Free Software
      19             :  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
      20             :  */
      21             : 
      22             : /**
      23             :  * @file
      24             :  * Indeo Video Interactive version 4 decoder
      25             :  *
      26             :  * Indeo 4 data is usually transported within .avi or .mov files.
      27             :  * Known FOURCCs: 'IV41'
      28             :  */
      29             : 
      30             : #define BITSTREAM_READER_LE
      31             : #include "avcodec.h"
      32             : #include "get_bits.h"
      33             : #include "indeo4data.h"
      34             : #include "internal.h"
      35             : #include "ivi.h"
      36             : #include "ivi_dsp.h"
      37             : 
      38             : #define IVI4_PIC_SIZE_ESC   7
      39             : 
      40             : 
      41             : static const struct {
      42             :     InvTransformPtr *inv_trans;
      43             :     DCTransformPtr  *dc_trans;
      44             :     int             is_2d_trans;
      45             : } transforms[18] = {
      46             :     { ff_ivi_inverse_haar_8x8,  ff_ivi_dc_haar_2d,       1 },
      47             :     { ff_ivi_row_haar8,         ff_ivi_dc_haar_2d,       0 },
      48             :     { ff_ivi_col_haar8,         ff_ivi_dc_haar_2d,       0 },
      49             :     { ff_ivi_put_pixels_8x8,    ff_ivi_put_dc_pixel_8x8, 1 },
      50             :     { ff_ivi_inverse_slant_8x8, ff_ivi_dc_slant_2d,      1 },
      51             :     { ff_ivi_row_slant8,        ff_ivi_dc_row_slant,     1 },
      52             :     { ff_ivi_col_slant8,        ff_ivi_dc_col_slant,     1 },
      53             :     { NULL, NULL, 0 }, /* inverse DCT 8x8 */
      54             :     { NULL, NULL, 0 }, /* inverse DCT 8x1 */
      55             :     { NULL, NULL, 0 }, /* inverse DCT 1x8 */
      56             :     { ff_ivi_inverse_haar_4x4,  ff_ivi_dc_haar_2d,       1 },
      57             :     { ff_ivi_inverse_slant_4x4, ff_ivi_dc_slant_2d,      1 },
      58             :     { NULL, NULL, 0 }, /* no transform 4x4 */
      59             :     { ff_ivi_row_haar4,         ff_ivi_dc_haar_2d,       0 },
      60             :     { ff_ivi_col_haar4,         ff_ivi_dc_haar_2d,       0 },
      61             :     { ff_ivi_row_slant4,        ff_ivi_dc_row_slant,     0 },
      62             :     { ff_ivi_col_slant4,        ff_ivi_dc_col_slant,     0 },
      63             :     { NULL, NULL, 0 }, /* inverse DCT 4x4 */
      64             : };
      65             : 
      66             : /**
      67             :  *  Decode subdivision of a plane.
      68             :  *  This is a simplified version that checks for two supported subdivisions:
      69             :  *  - 1 wavelet band  per plane, size factor 1:1, code pattern: 3
      70             :  *  - 4 wavelet bands per plane, size factor 1:4, code pattern: 2,3,3,3,3
      71             :  *  Anything else is either unsupported or corrupt.
      72             :  *
      73             :  *  @param[in,out] gb    the GetBit context
      74             :  *  @return        number of wavelet bands or 0 on error
      75             :  */
      76         202 : static int decode_plane_subdivision(GetBitContext *gb)
      77             : {
      78             :     int i;
      79             : 
      80         202 :     switch (get_bits(gb, 2)) {
      81         202 :     case 3:
      82         202 :         return 1;
      83           0 :     case 2:
      84           0 :         for (i = 0; i < 4; i++)
      85           0 :             if (get_bits(gb, 2) != 3)
      86           0 :                 return 0;
      87           0 :         return 4;
      88           0 :     default:
      89           0 :         return 0;
      90             :     }
      91             : }
      92             : 
      93           0 : static inline int scale_tile_size(int def_size, int size_factor)
      94             : {
      95           0 :     return size_factor == 15 ? def_size : (size_factor + 1) << 5;
      96             : }
      97             : 
      98             : /**
      99             :  *  Decode Indeo 4 picture header.
     100             :  *
     101             :  *  @param[in,out] ctx       pointer to the decoder context
     102             :  *  @param[in]     avctx     pointer to the AVCodecContext
     103             :  *  @return        result code: 0 = OK, negative number = error
     104             :  */
     105         101 : static int decode_pic_hdr(IVI45DecContext *ctx, AVCodecContext *avctx)
     106             : {
     107             :     int             pic_size_indx, i, p;
     108             :     IVIPicConfig    pic_conf;
     109             : 
     110         101 :     if (get_bits(&ctx->gb, 18) != 0x3FFF8) {
     111           0 :         av_log(avctx, AV_LOG_ERROR, "Invalid picture start code!\n");
     112           0 :         return AVERROR_INVALIDDATA;
     113             :     }
     114             : 
     115         101 :     ctx->prev_frame_type = ctx->frame_type;
     116         101 :     ctx->frame_type      = get_bits(&ctx->gb, 3);
     117         101 :     if (ctx->frame_type == 7) {
     118           0 :         av_log(avctx, AV_LOG_ERROR, "Invalid frame type: %d\n", ctx->frame_type);
     119           0 :         return AVERROR_INVALIDDATA;
     120             :     }
     121             : 
     122         101 :     if (ctx->frame_type == IVI4_FRAMETYPE_BIDIR)
     123           0 :         ctx->has_b_frames = 1;
     124             : 
     125         101 :     ctx->has_transp = get_bits1(&ctx->gb);
     126             : 
     127             :     /* unknown bit: Mac decoder ignores this bit, XANIM returns error */
     128         101 :     if (get_bits1(&ctx->gb)) {
     129           0 :         av_log(avctx, AV_LOG_ERROR, "Sync bit is set!\n");
     130           0 :         return AVERROR_INVALIDDATA;
     131             :     }
     132             : 
     133         101 :     ctx->data_size = get_bits1(&ctx->gb) ? get_bits(&ctx->gb, 24) : 0;
     134             : 
     135             :     /* null frames don't contain anything else so we just return */
     136         101 :     if (ctx->frame_type >= IVI4_FRAMETYPE_NULL_FIRST) {
     137             :         ff_dlog(avctx, "Null frame encountered!\n");
     138           0 :         return 0;
     139             :     }
     140             : 
     141             :     /* Check key lock status. If enabled - ignore lock word.         */
     142             :     /* Usually we have to prompt the user for the password, but      */
     143             :     /* we don't do that because Indeo 4 videos can be decoded anyway */
     144         101 :     if (get_bits1(&ctx->gb)) {
     145           0 :         skip_bits_long(&ctx->gb, 32);
     146             :         ff_dlog(avctx, "Password-protected clip!\n");
     147             :     }
     148             : 
     149         101 :     pic_size_indx = get_bits(&ctx->gb, 3);
     150         101 :     if (pic_size_indx == IVI4_PIC_SIZE_ESC) {
     151           0 :         pic_conf.pic_height = get_bits(&ctx->gb, 16);
     152           0 :         pic_conf.pic_width  = get_bits(&ctx->gb, 16);
     153             :     } else {
     154         101 :         pic_conf.pic_height = ivi4_common_pic_sizes[pic_size_indx * 2 + 1];
     155         101 :         pic_conf.pic_width  = ivi4_common_pic_sizes[pic_size_indx * 2    ];
     156             :     }
     157             : 
     158             :     /* Decode tile dimensions. */
     159         101 :     ctx->uses_tiling = get_bits1(&ctx->gb);
     160         101 :     if (ctx->uses_tiling) {
     161           0 :         pic_conf.tile_height = scale_tile_size(pic_conf.pic_height, get_bits(&ctx->gb, 4));
     162           0 :         pic_conf.tile_width  = scale_tile_size(pic_conf.pic_width,  get_bits(&ctx->gb, 4));
     163             :     } else {
     164         101 :         pic_conf.tile_height = pic_conf.pic_height;
     165         101 :         pic_conf.tile_width  = pic_conf.pic_width;
     166             :     }
     167             : 
     168             :     /* Decode chroma subsampling. We support only 4:4 aka YVU9. */
     169         101 :     if (get_bits(&ctx->gb, 2)) {
     170           0 :         av_log(avctx, AV_LOG_ERROR, "Only YVU9 picture format is supported!\n");
     171           0 :         return AVERROR_INVALIDDATA;
     172             :     }
     173         101 :     pic_conf.chroma_height = (pic_conf.pic_height + 3) >> 2;
     174         101 :     pic_conf.chroma_width  = (pic_conf.pic_width  + 3) >> 2;
     175             : 
     176             :     /* decode subdivision of the planes */
     177         101 :     pic_conf.luma_bands = decode_plane_subdivision(&ctx->gb);
     178         101 :     pic_conf.chroma_bands = 0;
     179         101 :     if (pic_conf.luma_bands)
     180         101 :         pic_conf.chroma_bands = decode_plane_subdivision(&ctx->gb);
     181         101 :     ctx->is_scalable = pic_conf.luma_bands != 1 || pic_conf.chroma_bands != 1;
     182         101 :     if (ctx->is_scalable && (pic_conf.luma_bands != 4 || pic_conf.chroma_bands != 1)) {
     183           0 :         av_log(avctx, AV_LOG_ERROR, "Scalability: unsupported subdivision! Luma bands: %d, chroma bands: %d\n",
     184           0 :                pic_conf.luma_bands, pic_conf.chroma_bands);
     185           0 :         return AVERROR_INVALIDDATA;
     186             :     }
     187             : 
     188             :     /* check if picture layout was changed and reallocate buffers */
     189         101 :     if (ivi_pic_config_cmp(&pic_conf, &ctx->pic_conf)) {
     190           1 :         if (ff_ivi_init_planes(avctx, ctx->planes, &pic_conf, 1)) {
     191           0 :             av_log(avctx, AV_LOG_ERROR, "Couldn't reallocate color planes!\n");
     192           0 :             ctx->pic_conf.luma_bands = 0;
     193           0 :             return AVERROR(ENOMEM);
     194             :         }
     195             : 
     196           1 :         ctx->pic_conf = pic_conf;
     197             : 
     198             :         /* set default macroblock/block dimensions */
     199           4 :         for (p = 0; p <= 2; p++) {
     200           6 :             for (i = 0; i < (!p ? pic_conf.luma_bands : pic_conf.chroma_bands); i++) {
     201           3 :                 ctx->planes[p].bands[i].mb_size  = !p ? (!ctx->is_scalable ? 16 : 8) : 4;
     202           3 :                 ctx->planes[p].bands[i].blk_size = !p ? 8 : 4;
     203             :             }
     204             :         }
     205             : 
     206           1 :         if (ff_ivi_init_tiles(ctx->planes, ctx->pic_conf.tile_width,
     207           1 :                               ctx->pic_conf.tile_height)) {
     208           0 :             av_log(avctx, AV_LOG_ERROR,
     209             :                    "Couldn't reallocate internal structures!\n");
     210           0 :             return AVERROR(ENOMEM);
     211             :         }
     212             :     }
     213             : 
     214         101 :     ctx->frame_num = get_bits1(&ctx->gb) ? get_bits(&ctx->gb, 20) : 0;
     215             : 
     216             :     /* skip decTimeEst field if present */
     217         101 :     if (get_bits1(&ctx->gb))
     218           0 :         skip_bits(&ctx->gb, 8);
     219             : 
     220             :     /* decode macroblock and block huffman codebooks */
     221         202 :     if (ff_ivi_dec_huff_desc(&ctx->gb, get_bits1(&ctx->gb), IVI_MB_HUFF,  &ctx->mb_vlc,  avctx) ||
     222         101 :         ff_ivi_dec_huff_desc(&ctx->gb, get_bits1(&ctx->gb), IVI_BLK_HUFF, &ctx->blk_vlc, avctx))
     223           0 :         return AVERROR_INVALIDDATA;
     224             : 
     225         101 :     ctx->rvmap_sel = get_bits1(&ctx->gb) ? get_bits(&ctx->gb, 3) : 8;
     226             : 
     227         101 :     ctx->in_imf = get_bits1(&ctx->gb);
     228         101 :     ctx->in_q   = get_bits1(&ctx->gb);
     229             : 
     230         101 :     ctx->pic_glob_quant = get_bits(&ctx->gb, 5);
     231             : 
     232             :     /* TODO: ignore this parameter if unused */
     233         101 :     ctx->unknown1 = get_bits1(&ctx->gb) ? get_bits(&ctx->gb, 3) : 0;
     234             : 
     235         101 :     ctx->checksum = get_bits1(&ctx->gb) ? get_bits(&ctx->gb, 16) : 0;
     236             : 
     237             :     /* skip picture header extension if any */
     238         303 :     while (get_bits1(&ctx->gb)) {
     239             :         ff_dlog(avctx, "Pic hdr extension encountered!\n");
     240         101 :         if (get_bits_left(&ctx->gb) < 10)
     241           0 :             return AVERROR_INVALIDDATA;
     242         101 :         skip_bits(&ctx->gb, 8);
     243             :     }
     244             : 
     245         101 :     if (get_bits1(&ctx->gb)) {
     246           0 :         av_log(avctx, AV_LOG_ERROR, "Bad blocks bits encountered!\n");
     247             :     }
     248             : 
     249         101 :     align_get_bits(&ctx->gb);
     250             : 
     251         101 :     return 0;
     252             : }
     253             : 
     254             : 
     255             : /**
     256             :  *  Decode Indeo 4 band header.
     257             :  *
     258             :  *  @param[in,out] ctx       pointer to the decoder context
     259             :  *  @param[in,out] band      pointer to the band descriptor
     260             :  *  @param[in]     avctx     pointer to the AVCodecContext
     261             :  *  @return        result code: 0 = OK, negative number = error
     262             :  */
     263         301 : static int decode_band_hdr(IVI45DecContext *ctx, IVIBandDesc *band,
     264             :                            AVCodecContext *avctx)
     265             : {
     266             :     int plane, band_num, indx, transform_id, scan_indx;
     267             :     int i;
     268             :     int quant_mat;
     269             : 
     270         301 :     plane    = get_bits(&ctx->gb, 2);
     271         301 :     band_num = get_bits(&ctx->gb, 4);
     272         301 :     if (band->plane != plane || band->band_num != band_num) {
     273           0 :         av_log(avctx, AV_LOG_ERROR, "Invalid band header sequence!\n");
     274           0 :         return AVERROR_INVALIDDATA;
     275             :     }
     276             : 
     277         301 :     band->is_empty = get_bits1(&ctx->gb);
     278         301 :     if (!band->is_empty) {
     279         301 :         int old_blk_size = band->blk_size;
     280             :         /* skip header size
     281             :          * If header size is not given, header size is 4 bytes. */
     282         301 :         if (get_bits1(&ctx->gb))
     283         301 :             skip_bits(&ctx->gb, 16);
     284             : 
     285         301 :         band->is_halfpel = get_bits(&ctx->gb, 2);
     286         301 :         if (band->is_halfpel >= 2) {
     287           0 :             av_log(avctx, AV_LOG_ERROR, "Invalid/unsupported mv resolution: %d!\n",
     288             :                    band->is_halfpel);
     289           0 :             return AVERROR_INVALIDDATA;
     290             :         }
     291         301 :         if (!band->is_halfpel)
     292           0 :             ctx->uses_fullpel = 1;
     293             : 
     294         301 :         band->checksum_present = get_bits1(&ctx->gb);
     295         301 :         if (band->checksum_present)
     296         301 :             band->checksum = get_bits(&ctx->gb, 16);
     297             : 
     298         301 :         indx = get_bits(&ctx->gb, 2);
     299         301 :         if (indx == 3) {
     300           0 :             av_log(avctx, AV_LOG_ERROR, "Invalid block size!\n");
     301           0 :             return AVERROR_INVALIDDATA;
     302             :         }
     303         301 :         band->mb_size  = 16 >> indx;
     304         301 :         band->blk_size = 8 >> (indx >> 1);
     305             : 
     306         301 :         band->inherit_mv     = get_bits1(&ctx->gb);
     307         301 :         band->inherit_qdelta = get_bits1(&ctx->gb);
     308             : 
     309         301 :         band->glob_quant = get_bits(&ctx->gb, 5);
     310             : 
     311         301 :         if (!get_bits1(&ctx->gb) || ctx->frame_type == IVI4_FRAMETYPE_INTRA) {
     312          21 :             transform_id = get_bits(&ctx->gb, 5);
     313          42 :             if (transform_id >= FF_ARRAY_ELEMS(transforms) ||
     314          21 :                 !transforms[transform_id].inv_trans) {
     315           0 :                 avpriv_request_sample(avctx, "Transform %d", transform_id);
     316           0 :                 return AVERROR_PATCHWELCOME;
     317             :             }
     318          21 :             if ((transform_id >= 7 && transform_id <= 9) ||
     319             :                  transform_id == 17) {
     320           0 :                 avpriv_request_sample(avctx, "DCT transform");
     321           0 :                 return AVERROR_PATCHWELCOME;
     322             :             }
     323             : 
     324          21 :             if (transform_id < 10 && band->blk_size < 8) {
     325           0 :                 av_log(avctx, AV_LOG_ERROR, "wrong transform size!\n");
     326           0 :                 return AVERROR_INVALIDDATA;
     327             :             }
     328          21 :             if ((transform_id >= 0 && transform_id <= 2) || transform_id == 10)
     329           0 :                 ctx->uses_haar = 1;
     330             : 
     331          21 :             band->inv_transform = transforms[transform_id].inv_trans;
     332          21 :             band->dc_transform  = transforms[transform_id].dc_trans;
     333          21 :             band->is_2d_trans   = transforms[transform_id].is_2d_trans;
     334             : 
     335          21 :             if (transform_id < 10)
     336           7 :                 band->transform_size = 8;
     337             :             else
     338          14 :                 band->transform_size = 4;
     339             : 
     340          21 :             if (band->blk_size != band->transform_size) {
     341           0 :                 av_log(avctx, AV_LOG_ERROR, "transform and block size mismatch (%d != %d)\n", band->transform_size, band->blk_size);
     342           0 :                 return AVERROR_INVALIDDATA;
     343             :             }
     344             : 
     345          21 :             scan_indx = get_bits(&ctx->gb, 4);
     346          21 :             if (scan_indx == 15) {
     347           0 :                 av_log(avctx, AV_LOG_ERROR, "Custom scan pattern encountered!\n");
     348           0 :                 return AVERROR_INVALIDDATA;
     349             :             }
     350          21 :             if (scan_indx > 4 && scan_indx < 10) {
     351          28 :                 if (band->blk_size != 4) {
     352           0 :                     av_log(avctx, AV_LOG_ERROR, "mismatching scan table!\n");
     353           0 :                     return AVERROR_INVALIDDATA;
     354             :                 }
     355           7 :             } else if (band->blk_size != 8) {
     356           0 :                 av_log(avctx, AV_LOG_ERROR, "mismatching scan table!\n");
     357           0 :                 return AVERROR_INVALIDDATA;
     358             :             }
     359             : 
     360          21 :             band->scan = scan_index_to_tab[scan_indx];
     361          21 :             band->scan_size = band->blk_size;
     362             : 
     363          21 :             quant_mat = get_bits(&ctx->gb, 5);
     364          21 :             if (quant_mat == 31) {
     365           0 :                 av_log(avctx, AV_LOG_ERROR, "Custom quant matrix encountered!\n");
     366           0 :                 return AVERROR_INVALIDDATA;
     367             :             }
     368          21 :             if (quant_mat >= FF_ARRAY_ELEMS(quant_index_to_tab)) {
     369           0 :                 avpriv_request_sample(avctx, "Quantization matrix %d",
     370             :                                       quant_mat);
     371           0 :                 return AVERROR_INVALIDDATA;
     372             :             }
     373          21 :             band->quant_mat = quant_mat;
     374             :         } else {
     375         280 :             if (old_blk_size != band->blk_size) {
     376           0 :                 av_log(avctx, AV_LOG_ERROR,
     377             :                        "The band block size does not match the configuration "
     378             :                        "inherited\n");
     379           0 :                 return AVERROR_INVALIDDATA;
     380             :             }
     381             :         }
     382         301 :         if (quant_index_to_tab[band->quant_mat] > 4 && band->blk_size == 4) {
     383           0 :             av_log(avctx, AV_LOG_ERROR, "Invalid quant matrix for 4x4 block encountered!\n");
     384           0 :             band->quant_mat = 0;
     385           0 :             return AVERROR_INVALIDDATA;
     386             :         }
     387         301 :         if (band->scan_size != band->blk_size) {
     388           0 :             av_log(avctx, AV_LOG_ERROR, "mismatching scan table!\n");
     389           0 :             return AVERROR_INVALIDDATA;
     390             :         }
     391         301 :         if (band->transform_size == 8 && band->blk_size < 8) {
     392           0 :             av_log(avctx, AV_LOG_ERROR, "mismatching transform_size!\n");
     393           0 :             return AVERROR_INVALIDDATA;
     394             :         }
     395             : 
     396             :         /* decode block huffman codebook */
     397         301 :         if (!get_bits1(&ctx->gb))
     398           0 :             band->blk_vlc.tab = ctx->blk_vlc.tab;
     399             :         else
     400         301 :             if (ff_ivi_dec_huff_desc(&ctx->gb, 1, IVI_BLK_HUFF,
     401             :                                      &band->blk_vlc, avctx))
     402           0 :                 return AVERROR_INVALIDDATA;
     403             : 
     404             :         /* select appropriate rvmap table for this band */
     405         301 :         band->rvmap_sel = get_bits1(&ctx->gb) ? get_bits(&ctx->gb, 3) : 8;
     406             : 
     407             :         /* decode rvmap probability corrections if any */
     408         301 :         band->num_corr = 0; /* there is no corrections */
     409         301 :         if (get_bits1(&ctx->gb)) {
     410         253 :             band->num_corr = get_bits(&ctx->gb, 8); /* get number of correction pairs */
     411         253 :             if (band->num_corr > 61) {
     412           0 :                 av_log(avctx, AV_LOG_ERROR, "Too many corrections: %d\n",
     413             :                        band->num_corr);
     414           0 :                 return AVERROR_INVALIDDATA;
     415             :             }
     416             : 
     417             :             /* read correction pairs */
     418        4087 :             for (i = 0; i < band->num_corr * 2; i++)
     419        3834 :                 band->corr[i] = get_bits(&ctx->gb, 8);
     420             :         }
     421             :     }
     422             : 
     423         301 :     if (band->blk_size == 8) {
     424         101 :         band->intra_base = &ivi4_quant_8x8_intra[quant_index_to_tab[band->quant_mat]][0];
     425         101 :         band->inter_base = &ivi4_quant_8x8_inter[quant_index_to_tab[band->quant_mat]][0];
     426             :     } else {
     427         200 :         band->intra_base = &ivi4_quant_4x4_intra[quant_index_to_tab[band->quant_mat]][0];
     428         200 :         band->inter_base = &ivi4_quant_4x4_inter[quant_index_to_tab[band->quant_mat]][0];
     429             :     }
     430             : 
     431             :     /* Indeo 4 doesn't use scale tables */
     432         301 :     band->intra_scale = NULL;
     433         301 :     band->inter_scale = NULL;
     434             : 
     435         301 :     align_get_bits(&ctx->gb);
     436             : 
     437         301 :     if (!band->scan) {
     438           0 :         av_log(avctx, AV_LOG_ERROR, "band->scan not set\n");
     439           0 :         return AVERROR_INVALIDDATA;
     440             :     }
     441             : 
     442         301 :     return 0;
     443             : }
     444             : 
     445             : 
     446             : /**
     447             :  *  Decode information (block type, cbp, quant delta, motion vector)
     448             :  *  for all macroblocks in the current tile.
     449             :  *
     450             :  *  @param[in,out] ctx       pointer to the decoder context
     451             :  *  @param[in,out] band      pointer to the band descriptor
     452             :  *  @param[in,out] tile      pointer to the tile descriptor
     453             :  *  @param[in]     avctx     pointer to the AVCodecContext
     454             :  *  @return        result code: 0 = OK, negative number = error
     455             :  */
     456         301 : static int decode_mb_info(IVI45DecContext *ctx, IVIBandDesc *band,
     457             :                           IVITile *tile, AVCodecContext *avctx)
     458             : {
     459             :     int         x, y, mv_x, mv_y, mv_delta, offs, mb_offset, blks_per_mb,
     460             :                 mv_scale, mb_type_bits, s;
     461             :     IVIMbInfo   *mb, *ref_mb;
     462         301 :     int         row_offset = band->mb_size * band->pitch;
     463             : 
     464         301 :     mb     = tile->mbs;
     465         301 :     ref_mb = tile->ref_mbs;
     466         301 :     offs   = tile->ypos * band->pitch + tile->xpos;
     467             : 
     468         301 :     blks_per_mb  = band->mb_size   != band->blk_size  ? 4 : 1;
     469         301 :     mb_type_bits = ctx->frame_type == IVI4_FRAMETYPE_BIDIR ? 2 : 1;
     470             : 
     471             :     /* scale factor for motion vectors */
     472         301 :     mv_scale = (ctx->planes[0].bands[0].mb_size >> 3) - (band->mb_size >> 3);
     473         301 :     mv_x = mv_y = 0;
     474             : 
     475         301 :     if (((tile->width + band->mb_size-1)/band->mb_size) * ((tile->height + band->mb_size-1)/band->mb_size) != tile->num_MBs) {
     476           0 :         av_log(avctx, AV_LOG_ERROR, "num_MBs mismatch %d %d %d %d\n", tile->width, tile->height, band->mb_size, tile->num_MBs);
     477           0 :         return -1;
     478             :     }
     479             : 
     480        4816 :     for (y = tile->ypos; y < tile->ypos + tile->height; y += band->mb_size) {
     481        4515 :         mb_offset = offs;
     482             : 
     483       94815 :         for (x = tile->xpos; x < tile->xpos + tile->width; x += band->mb_size) {
     484       90300 :             mb->xpos     = x;
     485       90300 :             mb->ypos     = y;
     486       90300 :             mb->buf_offs = mb_offset;
     487       90300 :             mb->b_mv_x   =
     488       90300 :             mb->b_mv_y   = 0;
     489             : 
     490       90300 :             if (get_bits1(&ctx->gb)) {
     491        2014 :                 if (ctx->frame_type == IVI4_FRAMETYPE_INTRA) {
     492           0 :                     av_log(avctx, AV_LOG_ERROR, "Empty macroblock in an INTRA picture!\n");
     493           0 :                     return AVERROR_INVALIDDATA;
     494             :                 }
     495        2014 :                 mb->type = 1; /* empty macroblocks are always INTER */
     496        2014 :                 mb->cbp  = 0; /* all blocks are empty */
     497             : 
     498        2014 :                 mb->q_delta = 0;
     499        2014 :                 if (!band->plane && !band->band_num && ctx->in_q) {
     500          56 :                     mb->q_delta = get_vlc2(&ctx->gb, ctx->mb_vlc.tab->table,
     501             :                                            IVI_VLC_BITS, 1);
     502          56 :                     mb->q_delta = IVI_TOSIGNED(mb->q_delta);
     503             :                 }
     504             : 
     505        2014 :                 mb->mv_x = mb->mv_y = 0; /* no motion vector coded */
     506        2014 :                 if (band->inherit_mv && ref_mb) {
     507             :                     /* motion vector inheritance */
     508        1958 :                     if (mv_scale) {
     509        1958 :                         mb->mv_x = ivi_scale_mv(ref_mb->mv_x, mv_scale);
     510        1958 :                         mb->mv_y = ivi_scale_mv(ref_mb->mv_y, mv_scale);
     511             :                     } else {
     512           0 :                         mb->mv_x = ref_mb->mv_x;
     513           0 :                         mb->mv_y = ref_mb->mv_y;
     514             :                     }
     515             :                 }
     516             :             } else {
     517       88286 :                 if (band->inherit_mv) {
     518             :                     /* copy mb_type from corresponding reference mb */
     519       58042 :                     if (!ref_mb) {
     520           0 :                         av_log(avctx, AV_LOG_ERROR, "ref_mb unavailable\n");
     521           0 :                         return AVERROR_INVALIDDATA;
     522             :                     }
     523       58042 :                     mb->type = ref_mb->type;
     524       58388 :                 } else if (ctx->frame_type == IVI4_FRAMETYPE_INTRA ||
     525       28144 :                            ctx->frame_type == IVI4_FRAMETYPE_INTRA1) {
     526        2100 :                     mb->type = 0; /* mb_type is always INTRA for intra-frames */
     527             :                 } else {
     528       28144 :                     mb->type = get_bits(&ctx->gb, mb_type_bits);
     529             :                 }
     530             : 
     531       88286 :                 mb->cbp = get_bits(&ctx->gb, blks_per_mb);
     532             : 
     533       88286 :                 mb->q_delta = 0;
     534       88286 :                 if (band->inherit_qdelta) {
     535       58042 :                     if (ref_mb) mb->q_delta = ref_mb->q_delta;
     536       31211 :                 } else if (mb->cbp || (!band->plane && !band->band_num &&
     537         967 :                            ctx->in_q)) {
     538       30244 :                     mb->q_delta = get_vlc2(&ctx->gb, ctx->mb_vlc.tab->table,
     539             :                                            IVI_VLC_BITS, 1);
     540       30244 :                     mb->q_delta = IVI_TOSIGNED(mb->q_delta);
     541             :                 }
     542             : 
     543       88286 :                 if (!mb->type) {
     544       77874 :                     mb->mv_x = mb->mv_y = 0; /* there is no motion vector in intra-macroblocks */
     545             :                 } else {
     546       10412 :                     if (band->inherit_mv) {
     547        6274 :                         if (ref_mb)
     548             :                             /* motion vector inheritance */
     549        6274 :                             if (mv_scale) {
     550        6274 :                                 mb->mv_x = ivi_scale_mv(ref_mb->mv_x, mv_scale);
     551        6274 :                                 mb->mv_y = ivi_scale_mv(ref_mb->mv_y, mv_scale);
     552             :                             } else {
     553           0 :                                 mb->mv_x = ref_mb->mv_x;
     554           0 :                                 mb->mv_y = ref_mb->mv_y;
     555             :                             }
     556             :                     } else {
     557             :                         /* decode motion vector deltas */
     558        4138 :                         mv_delta = get_vlc2(&ctx->gb, ctx->mb_vlc.tab->table,
     559             :                                             IVI_VLC_BITS, 1);
     560        4138 :                         mv_y += IVI_TOSIGNED(mv_delta);
     561        4138 :                         mv_delta = get_vlc2(&ctx->gb, ctx->mb_vlc.tab->table,
     562             :                                             IVI_VLC_BITS, 1);
     563        4138 :                         mv_x += IVI_TOSIGNED(mv_delta);
     564        4138 :                         mb->mv_x = mv_x;
     565        4138 :                         mb->mv_y = mv_y;
     566        4138 :                         if (mb->type == 3) {
     567           0 :                             mv_delta = get_vlc2(&ctx->gb,
     568           0 :                                                 ctx->mb_vlc.tab->table,
     569             :                                                 IVI_VLC_BITS, 1);
     570           0 :                             mv_y += IVI_TOSIGNED(mv_delta);
     571           0 :                             mv_delta = get_vlc2(&ctx->gb,
     572           0 :                                                 ctx->mb_vlc.tab->table,
     573             :                                                 IVI_VLC_BITS, 1);
     574           0 :                             mv_x += IVI_TOSIGNED(mv_delta);
     575           0 :                             mb->b_mv_x = -mv_x;
     576           0 :                             mb->b_mv_y = -mv_y;
     577             :                         }
     578             :                     }
     579       10412 :                     if (mb->type == 2) {
     580           0 :                         mb->b_mv_x = -mb->mv_x;
     581           0 :                         mb->b_mv_y = -mb->mv_y;
     582           0 :                         mb->mv_x = 0;
     583           0 :                         mb->mv_y = 0;
     584             :                     }
     585             :                 }
     586             :             }
     587             : 
     588       90300 :             s= band->is_halfpel;
     589       90300 :             if (mb->type)
     590       24852 :             if ( x +  (mb->mv_x   >>s) +                 (y+               (mb->mv_y   >>s))*band->pitch < 0 ||
     591       12426 :                  x + ((mb->mv_x+s)>>s) + band->mb_size - 1
     592       12426 :                    + (y+band->mb_size - 1 +((mb->mv_y+s)>>s))*band->pitch > band->bufsize -1) {
     593           0 :                 av_log(avctx, AV_LOG_ERROR, "motion vector %d %d outside reference\n", x*s + mb->mv_x, y*s + mb->mv_y);
     594           0 :                 return AVERROR_INVALIDDATA;
     595             :             }
     596             : 
     597       90300 :             mb++;
     598       90300 :             if (ref_mb)
     599       60000 :                 ref_mb++;
     600       90300 :             mb_offset += band->mb_size;
     601             :         }
     602             : 
     603        4515 :         offs += row_offset;
     604             :     }
     605             : 
     606         301 :     align_get_bits(&ctx->gb);
     607             : 
     608         301 :     return 0;
     609             : }
     610             : 
     611             : 
     612             : /**
     613             :  *  Rearrange decoding and reference buffers.
     614             :  *
     615             :  *  @param[in,out] ctx       pointer to the decoder context
     616             :  */
     617         101 : static void switch_buffers(IVI45DecContext *ctx)
     618             : {
     619         101 :     int is_prev_ref = 0, is_ref = 0;
     620             : 
     621         101 :     switch (ctx->prev_frame_type) {
     622          54 :     case IVI4_FRAMETYPE_INTRA:
     623             :     case IVI4_FRAMETYPE_INTRA1:
     624             :     case IVI4_FRAMETYPE_INTER:
     625          54 :         is_prev_ref = 1;
     626          54 :         break;
     627             :     }
     628             : 
     629         101 :     switch (ctx->frame_type) {
     630          54 :     case IVI4_FRAMETYPE_INTRA:
     631             :     case IVI4_FRAMETYPE_INTRA1:
     632             :     case IVI4_FRAMETYPE_INTER:
     633          54 :         is_ref = 1;
     634          54 :         break;
     635             :     }
     636             : 
     637         101 :     if (is_prev_ref && is_ref) {
     638           7 :         FFSWAP(int, ctx->dst_buf, ctx->ref_buf);
     639          94 :     } else if (is_prev_ref) {
     640          47 :         FFSWAP(int, ctx->ref_buf, ctx->b_ref_buf);
     641          47 :         FFSWAP(int, ctx->dst_buf, ctx->ref_buf);
     642             :     }
     643         101 : }
     644             : 
     645             : 
     646         201 : static int is_nonnull_frame(IVI45DecContext *ctx)
     647             : {
     648         201 :     return ctx->frame_type < IVI4_FRAMETYPE_NULL_FIRST;
     649             : }
     650             : 
     651             : 
     652           2 : static av_cold int decode_init(AVCodecContext *avctx)
     653             : {
     654           2 :     IVI45DecContext *ctx = avctx->priv_data;
     655             : 
     656           2 :     ff_ivi_init_static_vlc();
     657             : 
     658             :     /* copy rvmap tables in our context so we can apply changes to them */
     659           2 :     memcpy(ctx->rvmap_tabs, ff_ivi_rvmap_tabs, sizeof(ff_ivi_rvmap_tabs));
     660             : 
     661             :     /* Force allocation of the internal buffers */
     662             :     /* during picture header decoding.          */
     663           2 :     ctx->pic_conf.pic_width  = 0;
     664           2 :     ctx->pic_conf.pic_height = 0;
     665             : 
     666           2 :     avctx->pix_fmt = AV_PIX_FMT_YUV410P;
     667             : 
     668           2 :     ctx->decode_pic_hdr   = decode_pic_hdr;
     669           2 :     ctx->decode_band_hdr  = decode_band_hdr;
     670           2 :     ctx->decode_mb_info   = decode_mb_info;
     671           2 :     ctx->switch_buffers   = switch_buffers;
     672           2 :     ctx->is_nonnull_frame = is_nonnull_frame;
     673             : 
     674           2 :     ctx->is_indeo4 = 1;
     675           2 :     ctx->show_indeo4_info = 1;
     676             : 
     677           2 :     ctx->dst_buf   = 0;
     678           2 :     ctx->ref_buf   = 1;
     679           2 :     ctx->b_ref_buf = 3; /* buffer 2 is used for scalability mode */
     680           2 :     ctx->p_frame = av_frame_alloc();
     681           2 :     if (!ctx->p_frame)
     682           0 :         return AVERROR(ENOMEM);
     683             : 
     684           2 :     return 0;
     685             : }
     686             : 
     687             : 
     688             : AVCodec ff_indeo4_decoder = {
     689             :     .name           = "indeo4",
     690             :     .long_name      = NULL_IF_CONFIG_SMALL("Intel Indeo Video Interactive 4"),
     691             :     .type           = AVMEDIA_TYPE_VIDEO,
     692             :     .id             = AV_CODEC_ID_INDEO4,
     693             :     .priv_data_size = sizeof(IVI45DecContext),
     694             :     .init           = decode_init,
     695             :     .close          = ff_ivi_decode_close,
     696             :     .decode         = ff_ivi_decode_frame,
     697             :     .capabilities   = AV_CODEC_CAP_DR1,
     698             : };

Generated by: LCOV version 1.13