LCOV - code coverage report
Current view: top level - libavcodec - txd.c (source / functions) Hit Total Coverage
Test: coverage.info Lines: 56 83 67.5 %
Date: 2017-12-16 13:57:32 Functions: 1 1 100.0 %

          Line data    Source code
       1             : /*
       2             :  * Renderware TeXture Dictionary (.txd) image decoder
       3             :  * Copyright (c) 2007 Ivo van Poorten
       4             :  *
       5             :  * See also: http://wiki.multimedia.cx/index.php?title=TXD
       6             :  *
       7             :  * This file is part of FFmpeg.
       8             :  *
       9             :  * FFmpeg is free software; you can redistribute it and/or
      10             :  * modify it under the terms of the GNU Lesser General Public
      11             :  * License as published by the Free Software Foundation; either
      12             :  * version 2.1 of the License, or (at your option) any later version.
      13             :  *
      14             :  * FFmpeg is distributed in the hope that it will be useful,
      15             :  * but WITHOUT ANY WARRANTY; without even the implied warranty of
      16             :  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
      17             :  * Lesser General Public License for more details.
      18             :  *
      19             :  * You should have received a copy of the GNU Lesser General Public
      20             :  * License along with FFmpeg; if not, write to the Free Software
      21             :  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
      22             :  */
      23             : 
      24             : #include "libavutil/intreadwrite.h"
      25             : #include "libavutil/imgutils.h"
      26             : #include "bytestream.h"
      27             : #include "avcodec.h"
      28             : #include "internal.h"
      29             : #include "texturedsp.h"
      30             : 
      31             : #define TXD_DXT1 0x31545844
      32             : #define TXD_DXT3 0x33545844
      33             : 
      34          16 : static int txd_decode_frame(AVCodecContext *avctx, void *data, int *got_frame,
      35             :                             AVPacket *avpkt) {
      36             :     GetByteContext gb;
      37             :     TextureDSPContext dxtc;
      38          16 :     AVFrame * const p = data;
      39             :     unsigned int version, w, h, d3d_format, depth, stride, flags;
      40             :     unsigned int y, v;
      41             :     uint8_t *ptr;
      42             :     uint32_t *pal;
      43             :     int i, j;
      44             :     int ret;
      45             : 
      46          16 :     ff_texturedsp_init(&dxtc);
      47             : 
      48          16 :     bytestream2_init(&gb, avpkt->data, avpkt->size);
      49          16 :     version         = bytestream2_get_le32(&gb);
      50          16 :     bytestream2_skip(&gb, 72);
      51          16 :     d3d_format      = bytestream2_get_le32(&gb);
      52          16 :     w               = bytestream2_get_le16(&gb);
      53          16 :     h               = bytestream2_get_le16(&gb);
      54          16 :     depth           = bytestream2_get_byte(&gb);
      55          16 :     bytestream2_skip(&gb, 2);
      56          16 :     flags           = bytestream2_get_byte(&gb);
      57             : 
      58          16 :     if (version < 8 || version > 9) {
      59           0 :         avpriv_report_missing_feature(avctx, "Texture data version %u", version);
      60           0 :         return AVERROR_PATCHWELCOME;
      61             :     }
      62             : 
      63          16 :     if (depth == 8) {
      64           2 :         avctx->pix_fmt = AV_PIX_FMT_PAL8;
      65          14 :     } else if (depth == 16 || depth == 32) {
      66          14 :         avctx->pix_fmt = AV_PIX_FMT_RGBA;
      67             :     } else {
      68           0 :         avpriv_report_missing_feature(avctx, "Color depth of %u", depth);
      69           0 :         return AVERROR_PATCHWELCOME;
      70             :     }
      71             : 
      72          16 :     if ((ret = ff_set_dimensions(avctx, w, h)) < 0)
      73           0 :         return ret;
      74             : 
      75          16 :     avctx->coded_width  = FFALIGN(w, 4);
      76          16 :     avctx->coded_height = FFALIGN(h, 4);
      77             : 
      78          16 :     if ((ret = ff_get_buffer(avctx, p, 0)) < 0)
      79           0 :         return ret;
      80             : 
      81          16 :     p->pict_type = AV_PICTURE_TYPE_I;
      82             : 
      83          16 :     ptr    = p->data[0];
      84          16 :     stride = p->linesize[0];
      85             : 
      86          16 :     if (depth == 8) {
      87           2 :         pal = (uint32_t *) p->data[1];
      88         514 :         for (y = 0; y < 256; y++) {
      89         512 :             v = bytestream2_get_be32(&gb);
      90         512 :             pal[y] = (v >> 8) + (v << 24);
      91             :         }
      92           2 :         if (bytestream2_get_bytes_left(&gb) < w * h)
      93           0 :             return AVERROR_INVALIDDATA;
      94           2 :         bytestream2_skip(&gb, 4);
      95        1026 :         for (y=0; y<h; y++) {
      96        1024 :             bytestream2_get_buffer(&gb, ptr, w);
      97        1024 :             ptr += stride;
      98             :         }
      99          14 :     } else if (depth == 16) {
     100          14 :         bytestream2_skip(&gb, 4);
     101          14 :         switch (d3d_format) {
     102          12 :         case 0:
     103          12 :             if (!(flags & 1))
     104           0 :                 goto unsupported;
     105             :         case TXD_DXT1:
     106          12 :             if (bytestream2_get_bytes_left(&gb) < AV_CEIL_RSHIFT(w, 2) * AV_CEIL_RSHIFT(h, 2) * 8)
     107           0 :                 return AVERROR_INVALIDDATA;
     108         204 :             for (j = 0; j < avctx->height; j += 4) {
     109        3264 :                 for (i = 0; i < avctx->width; i += 4) {
     110        3072 :                     uint8_t *p = ptr + i * 4 + j * stride;
     111        3072 :                     int step = dxtc.dxt1_block(p, stride, gb.buffer);
     112        3072 :                     bytestream2_skip(&gb, step);
     113             :                 }
     114             :             }
     115          12 :             break;
     116           2 :         case TXD_DXT3:
     117           2 :             if (bytestream2_get_bytes_left(&gb) < AV_CEIL_RSHIFT(w, 2) * AV_CEIL_RSHIFT(h, 2) * 16)
     118           0 :                 return AVERROR_INVALIDDATA;
     119         128 :             for (j = 0; j < avctx->height; j += 4) {
     120       12348 :                 for (i = 0; i < avctx->width; i += 4) {
     121       12222 :                     uint8_t *p = ptr + i * 4 + j * stride;
     122       12222 :                     int step = dxtc.dxt3_block(p, stride, gb.buffer);
     123       12222 :                     bytestream2_skip(&gb, step);
     124             :                 }
     125             :             }
     126           2 :             break;
     127           0 :         default:
     128           0 :             goto unsupported;
     129             :         }
     130           0 :     } else if (depth == 32) {
     131           0 :         switch (d3d_format) {
     132           0 :         case 0x15:
     133             :         case 0x16:
     134           0 :             if (bytestream2_get_bytes_left(&gb) < h * w * 4)
     135           0 :                 return AVERROR_INVALIDDATA;
     136           0 :             for (y=0; y<h; y++) {
     137           0 :                 bytestream2_get_buffer(&gb, ptr, w * 4);
     138           0 :                 ptr += stride;
     139             :             }
     140           0 :             break;
     141           0 :         default:
     142           0 :             goto unsupported;
     143             :         }
     144           0 :     }
     145             : 
     146          16 :     *got_frame = 1;
     147             : 
     148          16 :     return avpkt->size;
     149             : 
     150           0 : unsupported:
     151           0 :     avpriv_report_missing_feature(avctx, "d3d format (%08x)", d3d_format);
     152           0 :     return AVERROR_PATCHWELCOME;
     153             : }
     154             : 
     155             : AVCodec ff_txd_decoder = {
     156             :     .name           = "txd",
     157             :     .long_name      = NULL_IF_CONFIG_SMALL("Renderware TXD (TeXture Dictionary) image"),
     158             :     .type           = AVMEDIA_TYPE_VIDEO,
     159             :     .id             = AV_CODEC_ID_TXD,
     160             :     .decode         = txd_decode_frame,
     161             :     .capabilities   = AV_CODEC_CAP_DR1,
     162             : };

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