1/* 2 * XWD image format 3 * 4 * Copyright (c) 2012 Paul B Mahol 5 * 6 * This file is part of FFmpeg. 7 * 8 * FFmpeg is free software; you can redistribute it and/or 9 * modify it under the terms of the GNU Lesser General Public 10 * License as published by the Free Software Foundation; either 11 * version 2.1 of the License, or (at your option) any later version. 12 * 13 * FFmpeg is distributed in the hope that it will be useful, 14 * but WITHOUT ANY WARRANTY; without even the implied warranty of 15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 16 * Lesser General Public License for more details. 17 * 18 * You should have received a copy of the GNU Lesser General Public 19 * License along with FFmpeg; if not, write to the Free Software 20 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 21 */ 22 23#include <inttypes.h> 24 25#include "libavutil/imgutils.h" 26#include "avcodec.h" 27#include "bytestream.h" 28#include "codec_internal.h" 29#include "internal.h" 30#include "xwd.h" 31 32static int xwd_decode_frame(AVCodecContext *avctx, AVFrame *p, 33 int *got_frame, AVPacket *avpkt) 34{ 35 const uint8_t *buf = avpkt->data; 36 int i, ret, buf_size = avpkt->size; 37 uint32_t version, header_size, vclass, ncolors; 38 uint32_t xoffset, be, bpp, lsize, rsize; 39 uint32_t pixformat, pixdepth, bunit, bitorder, bpad; 40 uint32_t rgb[3]; 41 uint8_t *ptr; 42 int width, height; 43 GetByteContext gb; 44 45 if (buf_size < XWD_HEADER_SIZE) 46 return AVERROR_INVALIDDATA; 47 48 bytestream2_init(&gb, buf, buf_size); 49 header_size = bytestream2_get_be32u(&gb); 50 51 version = bytestream2_get_be32u(&gb); 52 if (version != XWD_VERSION) { 53 av_log(avctx, AV_LOG_ERROR, "unsupported version\n"); 54 return AVERROR_INVALIDDATA; 55 } 56 57 if (buf_size < header_size || header_size < XWD_HEADER_SIZE) { 58 av_log(avctx, AV_LOG_ERROR, "invalid header size\n"); 59 return AVERROR_INVALIDDATA; 60 } 61 62 pixformat = bytestream2_get_be32u(&gb); 63 pixdepth = bytestream2_get_be32u(&gb); 64 width = bytestream2_get_be32u(&gb); 65 height = bytestream2_get_be32u(&gb); 66 xoffset = bytestream2_get_be32u(&gb); 67 be = bytestream2_get_be32u(&gb); 68 bunit = bytestream2_get_be32u(&gb); 69 bitorder = bytestream2_get_be32u(&gb); 70 bpad = bytestream2_get_be32u(&gb); 71 bpp = bytestream2_get_be32u(&gb); 72 lsize = bytestream2_get_be32u(&gb); 73 vclass = bytestream2_get_be32u(&gb); 74 rgb[0] = bytestream2_get_be32u(&gb); 75 rgb[1] = bytestream2_get_be32u(&gb); 76 rgb[2] = bytestream2_get_be32u(&gb); 77 bytestream2_skipu(&gb, 8); 78 ncolors = bytestream2_get_be32u(&gb); 79 bytestream2_skipu(&gb, header_size - (XWD_HEADER_SIZE - 20)); 80 81 if ((ret = ff_set_dimensions(avctx, width, height)) < 0) 82 return ret; 83 84 av_log(avctx, AV_LOG_DEBUG, 85 "pixformat %"PRIu32", pixdepth %"PRIu32", bunit %"PRIu32", bitorder %"PRIu32", bpad %"PRIu32"\n", 86 pixformat, pixdepth, bunit, bitorder, bpad); 87 av_log(avctx, AV_LOG_DEBUG, 88 "vclass %"PRIu32", ncolors %"PRIu32", bpp %"PRIu32", be %"PRIu32", lsize %"PRIu32", xoffset %"PRIu32"\n", 89 vclass, ncolors, bpp, be, lsize, xoffset); 90 av_log(avctx, AV_LOG_DEBUG, 91 "red %0"PRIx32", green %0"PRIx32", blue %0"PRIx32"\n", 92 rgb[0], rgb[1], rgb[2]); 93 94 if (pixformat > XWD_Z_PIXMAP) { 95 av_log(avctx, AV_LOG_ERROR, "invalid pixmap format\n"); 96 return AVERROR_INVALIDDATA; 97 } 98 99 if (pixdepth == 0 || pixdepth > 32) { 100 av_log(avctx, AV_LOG_ERROR, "invalid pixmap depth\n"); 101 return AVERROR_INVALIDDATA; 102 } 103 104 if (xoffset) { 105 avpriv_request_sample(avctx, "xoffset %"PRIu32"", xoffset); 106 return AVERROR_PATCHWELCOME; 107 } 108 109 if (be > 1) { 110 av_log(avctx, AV_LOG_ERROR, "invalid byte order\n"); 111 return AVERROR_INVALIDDATA; 112 } 113 114 if (bitorder > 1) { 115 av_log(avctx, AV_LOG_ERROR, "invalid bitmap bit order\n"); 116 return AVERROR_INVALIDDATA; 117 } 118 119 if (bunit != 8 && bunit != 16 && bunit != 32) { 120 av_log(avctx, AV_LOG_ERROR, "invalid bitmap unit\n"); 121 return AVERROR_INVALIDDATA; 122 } 123 124 if (bpad != 8 && bpad != 16 && bpad != 32) { 125 av_log(avctx, AV_LOG_ERROR, "invalid bitmap scan-line pad\n"); 126 return AVERROR_INVALIDDATA; 127 } 128 129 if (bpp == 0 || bpp > 32) { 130 av_log(avctx, AV_LOG_ERROR, "invalid bits per pixel\n"); 131 return AVERROR_INVALIDDATA; 132 } 133 134 if (ncolors > 256) { 135 av_log(avctx, AV_LOG_ERROR, "invalid number of entries in colormap\n"); 136 return AVERROR_INVALIDDATA; 137 } 138 139 if ((ret = av_image_check_size(avctx->width, avctx->height, 0, NULL)) < 0) 140 return ret; 141 142 rsize = FFALIGN(avctx->width * bpp, bpad) / 8; 143 if (lsize < rsize) { 144 av_log(avctx, AV_LOG_ERROR, "invalid bytes per scan-line\n"); 145 return AVERROR_INVALIDDATA; 146 } 147 148 if (bytestream2_get_bytes_left(&gb) < ncolors * XWD_CMAP_SIZE + (uint64_t)avctx->height * lsize) { 149 av_log(avctx, AV_LOG_ERROR, "input buffer too small\n"); 150 return AVERROR_INVALIDDATA; 151 } 152 153 if (pixformat != XWD_Z_PIXMAP) { 154 avpriv_report_missing_feature(avctx, "Pixmap format %"PRIu32, pixformat); 155 return AVERROR_PATCHWELCOME; 156 } 157 158 avctx->pix_fmt = AV_PIX_FMT_NONE; 159 switch (vclass) { 160 case XWD_STATIC_GRAY: 161 case XWD_GRAY_SCALE: 162 if (bpp != 1 && bpp != 8) 163 return AVERROR_INVALIDDATA; 164 if (bpp == 1 && pixdepth == 1) { 165 avctx->pix_fmt = AV_PIX_FMT_MONOWHITE; 166 } else if (bpp == 8 && pixdepth == 8) { 167 avctx->pix_fmt = AV_PIX_FMT_GRAY8; 168 } 169 break; 170 case XWD_STATIC_COLOR: 171 case XWD_PSEUDO_COLOR: 172 if (bpp == 8) 173 avctx->pix_fmt = AV_PIX_FMT_PAL8; 174 break; 175 case XWD_TRUE_COLOR: 176 case XWD_DIRECT_COLOR: 177 if (bpp != 16 && bpp != 24 && bpp != 32) 178 return AVERROR_INVALIDDATA; 179 if (bpp == 16 && pixdepth == 15) { 180 if (rgb[0] == 0x7C00 && rgb[1] == 0x3E0 && rgb[2] == 0x1F) 181 avctx->pix_fmt = be ? AV_PIX_FMT_RGB555BE : AV_PIX_FMT_RGB555LE; 182 else if (rgb[0] == 0x1F && rgb[1] == 0x3E0 && rgb[2] == 0x7C00) 183 avctx->pix_fmt = be ? AV_PIX_FMT_BGR555BE : AV_PIX_FMT_BGR555LE; 184 } else if (bpp == 16 && pixdepth == 16) { 185 if (rgb[0] == 0xF800 && rgb[1] == 0x7E0 && rgb[2] == 0x1F) 186 avctx->pix_fmt = be ? AV_PIX_FMT_RGB565BE : AV_PIX_FMT_RGB565LE; 187 else if (rgb[0] == 0x1F && rgb[1] == 0x7E0 && rgb[2] == 0xF800) 188 avctx->pix_fmt = be ? AV_PIX_FMT_BGR565BE : AV_PIX_FMT_BGR565LE; 189 } else if (bpp == 24) { 190 if (rgb[0] == 0xFF0000 && rgb[1] == 0xFF00 && rgb[2] == 0xFF) 191 avctx->pix_fmt = be ? AV_PIX_FMT_RGB24 : AV_PIX_FMT_BGR24; 192 else if (rgb[0] == 0xFF && rgb[1] == 0xFF00 && rgb[2] == 0xFF0000) 193 avctx->pix_fmt = be ? AV_PIX_FMT_BGR24 : AV_PIX_FMT_RGB24; 194 } else if (bpp == 32) { 195 if (rgb[0] == 0xFF0000 && rgb[1] == 0xFF00 && rgb[2] == 0xFF) 196 avctx->pix_fmt = be ? AV_PIX_FMT_ARGB : AV_PIX_FMT_BGRA; 197 else if (rgb[0] == 0xFF && rgb[1] == 0xFF00 && rgb[2] == 0xFF0000) 198 avctx->pix_fmt = be ? AV_PIX_FMT_ABGR : AV_PIX_FMT_RGBA; 199 } 200 bytestream2_skipu(&gb, ncolors * XWD_CMAP_SIZE); 201 break; 202 default: 203 av_log(avctx, AV_LOG_ERROR, "invalid visual class\n"); 204 return AVERROR_INVALIDDATA; 205 } 206 207 if (avctx->pix_fmt == AV_PIX_FMT_NONE) { 208 avpriv_request_sample(avctx, 209 "Unknown file: bpp %"PRIu32", pixdepth %"PRIu32", vclass %"PRIu32"", 210 bpp, pixdepth, vclass); 211 return AVERROR_PATCHWELCOME; 212 } 213 214 if ((ret = ff_get_buffer(avctx, p, 0)) < 0) 215 return ret; 216 217 p->key_frame = 1; 218 p->pict_type = AV_PICTURE_TYPE_I; 219 220 if (avctx->pix_fmt == AV_PIX_FMT_PAL8) { 221 uint32_t *dst = (uint32_t *)p->data[1]; 222 uint8_t red, green, blue; 223 224 for (i = 0; i < ncolors; i++) { 225 226 bytestream2_skipu(&gb, 4); // skip colormap entry number 227 red = bytestream2_get_byteu(&gb); 228 bytestream2_skipu(&gb, 1); 229 green = bytestream2_get_byteu(&gb); 230 bytestream2_skipu(&gb, 1); 231 blue = bytestream2_get_byteu(&gb); 232 bytestream2_skipu(&gb, 3); // skip bitmask flag and padding 233 234 dst[i] = 0xFFU << 24 | red << 16 | green << 8 | blue; 235 } 236 } 237 238 ptr = p->data[0]; 239 for (i = 0; i < avctx->height; i++) { 240 bytestream2_get_bufferu(&gb, ptr, rsize); 241 bytestream2_skipu(&gb, lsize - rsize); 242 ptr += p->linesize[0]; 243 } 244 245 *got_frame = 1; 246 247 return buf_size; 248} 249 250const FFCodec ff_xwd_decoder = { 251 .p.name = "xwd", 252 .p.long_name = NULL_IF_CONFIG_SMALL("XWD (X Window Dump) image"), 253 .p.type = AVMEDIA_TYPE_VIDEO, 254 .p.id = AV_CODEC_ID_XWD, 255 .p.capabilities = AV_CODEC_CAP_DR1, 256 FF_CODEC_DECODE_CB(xwd_decode_frame), 257}; 258