Go to most recent revision | Details | Last modification | View Log | RSS feed
| Rev | Author | Line No. | Line |
|---|---|---|---|
| 4349 | Serge | 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 "libavutil/imgutils.h" |
||
| 24 | #include "avcodec.h" |
||
| 25 | #include "bytestream.h" |
||
| 26 | #include "internal.h" |
||
| 27 | #include "xwd.h" |
||
| 28 | |||
| 29 | static int xwd_decode_frame(AVCodecContext *avctx, void *data, |
||
| 30 | int *got_frame, AVPacket *avpkt) |
||
| 31 | { |
||
| 32 | AVFrame *p = data; |
||
| 33 | const uint8_t *buf = avpkt->data; |
||
| 34 | int i, ret, buf_size = avpkt->size; |
||
| 35 | uint32_t version, header_size, vclass, ncolors; |
||
| 36 | uint32_t xoffset, be, bpp, lsize, rsize; |
||
| 37 | uint32_t pixformat, pixdepth, bunit, bitorder, bpad; |
||
| 38 | uint32_t rgb[3]; |
||
| 39 | uint8_t *ptr; |
||
| 40 | GetByteContext gb; |
||
| 41 | |||
| 42 | if (buf_size < XWD_HEADER_SIZE) |
||
| 43 | return AVERROR_INVALIDDATA; |
||
| 44 | |||
| 45 | bytestream2_init(&gb, buf, buf_size); |
||
| 46 | header_size = bytestream2_get_be32u(&gb); |
||
| 47 | |||
| 48 | version = bytestream2_get_be32u(&gb); |
||
| 49 | if (version != XWD_VERSION) { |
||
| 50 | av_log(avctx, AV_LOG_ERROR, "unsupported version\n"); |
||
| 51 | return AVERROR_INVALIDDATA; |
||
| 52 | } |
||
| 53 | |||
| 54 | if (buf_size < header_size || header_size < XWD_HEADER_SIZE) { |
||
| 55 | av_log(avctx, AV_LOG_ERROR, "invalid header size\n"); |
||
| 56 | return AVERROR_INVALIDDATA; |
||
| 57 | } |
||
| 58 | |||
| 59 | pixformat = bytestream2_get_be32u(&gb); |
||
| 60 | pixdepth = bytestream2_get_be32u(&gb); |
||
| 61 | avctx->width = bytestream2_get_be32u(&gb); |
||
| 62 | avctx->height = bytestream2_get_be32u(&gb); |
||
| 63 | xoffset = bytestream2_get_be32u(&gb); |
||
| 64 | be = bytestream2_get_be32u(&gb); |
||
| 65 | bunit = bytestream2_get_be32u(&gb); |
||
| 66 | bitorder = bytestream2_get_be32u(&gb); |
||
| 67 | bpad = bytestream2_get_be32u(&gb); |
||
| 68 | bpp = bytestream2_get_be32u(&gb); |
||
| 69 | lsize = bytestream2_get_be32u(&gb); |
||
| 70 | vclass = bytestream2_get_be32u(&gb); |
||
| 71 | rgb[0] = bytestream2_get_be32u(&gb); |
||
| 72 | rgb[1] = bytestream2_get_be32u(&gb); |
||
| 73 | rgb[2] = bytestream2_get_be32u(&gb); |
||
| 74 | bytestream2_skipu(&gb, 8); |
||
| 75 | ncolors = bytestream2_get_be32u(&gb); |
||
| 76 | bytestream2_skipu(&gb, header_size - (XWD_HEADER_SIZE - 20)); |
||
| 77 | |||
| 78 | av_log(avctx, AV_LOG_DEBUG, "pixformat %d, pixdepth %d, bunit %d, bitorder %d, bpad %d\n", |
||
| 79 | pixformat, pixdepth, bunit, bitorder, bpad); |
||
| 80 | av_log(avctx, AV_LOG_DEBUG, "vclass %d, ncolors %d, bpp %d, be %d, lsize %d, xoffset %d\n", |
||
| 81 | vclass, ncolors, bpp, be, lsize, xoffset); |
||
| 82 | av_log(avctx, AV_LOG_DEBUG, "red %0x, green %0x, blue %0x\n", rgb[0], rgb[1], rgb[2]); |
||
| 83 | |||
| 84 | if (pixformat > XWD_Z_PIXMAP) { |
||
| 85 | av_log(avctx, AV_LOG_ERROR, "invalid pixmap format\n"); |
||
| 86 | return AVERROR_INVALIDDATA; |
||
| 87 | } |
||
| 88 | |||
| 89 | if (pixdepth == 0 || pixdepth > 32) { |
||
| 90 | av_log(avctx, AV_LOG_ERROR, "invalid pixmap depth\n"); |
||
| 91 | return AVERROR_INVALIDDATA; |
||
| 92 | } |
||
| 93 | |||
| 94 | if (xoffset) { |
||
| 95 | avpriv_request_sample(avctx, "xoffset %d", xoffset); |
||
| 96 | return AVERROR_PATCHWELCOME; |
||
| 97 | } |
||
| 98 | |||
| 99 | if (be > 1) { |
||
| 100 | av_log(avctx, AV_LOG_ERROR, "invalid byte order\n"); |
||
| 101 | return AVERROR_INVALIDDATA; |
||
| 102 | } |
||
| 103 | |||
| 104 | if (bitorder > 1) { |
||
| 105 | av_log(avctx, AV_LOG_ERROR, "invalid bitmap bit order\n"); |
||
| 106 | return AVERROR_INVALIDDATA; |
||
| 107 | } |
||
| 108 | |||
| 109 | if (bunit != 8 && bunit != 16 && bunit != 32) { |
||
| 110 | av_log(avctx, AV_LOG_ERROR, "invalid bitmap unit\n"); |
||
| 111 | return AVERROR_INVALIDDATA; |
||
| 112 | } |
||
| 113 | |||
| 114 | if (bpad != 8 && bpad != 16 && bpad != 32) { |
||
| 115 | av_log(avctx, AV_LOG_ERROR, "invalid bitmap scan-line pad\n"); |
||
| 116 | return AVERROR_INVALIDDATA; |
||
| 117 | } |
||
| 118 | |||
| 119 | if (bpp == 0 || bpp > 32) { |
||
| 120 | av_log(avctx, AV_LOG_ERROR, "invalid bits per pixel\n"); |
||
| 121 | return AVERROR_INVALIDDATA; |
||
| 122 | } |
||
| 123 | |||
| 124 | if (ncolors > 256) { |
||
| 125 | av_log(avctx, AV_LOG_ERROR, "invalid number of entries in colormap\n"); |
||
| 126 | return AVERROR_INVALIDDATA; |
||
| 127 | } |
||
| 128 | |||
| 129 | if ((ret = av_image_check_size(avctx->width, avctx->height, 0, NULL)) < 0) |
||
| 130 | return ret; |
||
| 131 | |||
| 132 | rsize = FFALIGN(avctx->width * bpp, bpad) / 8; |
||
| 133 | if (lsize < rsize) { |
||
| 134 | av_log(avctx, AV_LOG_ERROR, "invalid bytes per scan-line\n"); |
||
| 135 | return AVERROR_INVALIDDATA; |
||
| 136 | } |
||
| 137 | |||
| 138 | if (bytestream2_get_bytes_left(&gb) < ncolors * XWD_CMAP_SIZE + avctx->height * lsize) { |
||
| 139 | av_log(avctx, AV_LOG_ERROR, "input buffer too small\n"); |
||
| 140 | return AVERROR_INVALIDDATA; |
||
| 141 | } |
||
| 142 | |||
| 143 | if (pixformat != XWD_Z_PIXMAP) { |
||
| 144 | avpriv_report_missing_feature(avctx, "Pixmap format %d", pixformat); |
||
| 145 | return AVERROR_PATCHWELCOME; |
||
| 146 | } |
||
| 147 | |||
| 148 | avctx->pix_fmt = AV_PIX_FMT_NONE; |
||
| 149 | switch (vclass) { |
||
| 150 | case XWD_STATIC_GRAY: |
||
| 151 | case XWD_GRAY_SCALE: |
||
| 152 | if (bpp != 1 && bpp != 8) |
||
| 153 | return AVERROR_INVALIDDATA; |
||
| 154 | if (pixdepth == 1) { |
||
| 155 | avctx->pix_fmt = AV_PIX_FMT_MONOWHITE; |
||
| 156 | } else if (pixdepth == 8) { |
||
| 157 | avctx->pix_fmt = AV_PIX_FMT_GRAY8; |
||
| 158 | } |
||
| 159 | break; |
||
| 160 | case XWD_STATIC_COLOR: |
||
| 161 | case XWD_PSEUDO_COLOR: |
||
| 162 | if (bpp == 8) |
||
| 163 | avctx->pix_fmt = AV_PIX_FMT_PAL8; |
||
| 164 | break; |
||
| 165 | case XWD_TRUE_COLOR: |
||
| 166 | case XWD_DIRECT_COLOR: |
||
| 167 | if (bpp != 16 && bpp != 24 && bpp != 32) |
||
| 168 | return AVERROR_INVALIDDATA; |
||
| 169 | if (bpp == 16 && pixdepth == 15) { |
||
| 170 | if (rgb[0] == 0x7C00 && rgb[1] == 0x3E0 && rgb[2] == 0x1F) |
||
| 171 | avctx->pix_fmt = be ? AV_PIX_FMT_RGB555BE : AV_PIX_FMT_RGB555LE; |
||
| 172 | else if (rgb[0] == 0x1F && rgb[1] == 0x3E0 && rgb[2] == 0x7C00) |
||
| 173 | avctx->pix_fmt = be ? AV_PIX_FMT_BGR555BE : AV_PIX_FMT_BGR555LE; |
||
| 174 | } else if (bpp == 16 && pixdepth == 16) { |
||
| 175 | if (rgb[0] == 0xF800 && rgb[1] == 0x7E0 && rgb[2] == 0x1F) |
||
| 176 | avctx->pix_fmt = be ? AV_PIX_FMT_RGB565BE : AV_PIX_FMT_RGB565LE; |
||
| 177 | else if (rgb[0] == 0x1F && rgb[1] == 0x7E0 && rgb[2] == 0xF800) |
||
| 178 | avctx->pix_fmt = be ? AV_PIX_FMT_BGR565BE : AV_PIX_FMT_BGR565LE; |
||
| 179 | } else if (bpp == 24) { |
||
| 180 | if (rgb[0] == 0xFF0000 && rgb[1] == 0xFF00 && rgb[2] == 0xFF) |
||
| 181 | avctx->pix_fmt = be ? AV_PIX_FMT_RGB24 : AV_PIX_FMT_BGR24; |
||
| 182 | else if (rgb[0] == 0xFF && rgb[1] == 0xFF00 && rgb[2] == 0xFF0000) |
||
| 183 | avctx->pix_fmt = be ? AV_PIX_FMT_BGR24 : AV_PIX_FMT_RGB24; |
||
| 184 | } else if (bpp == 32) { |
||
| 185 | if (rgb[0] == 0xFF0000 && rgb[1] == 0xFF00 && rgb[2] == 0xFF) |
||
| 186 | avctx->pix_fmt = be ? AV_PIX_FMT_ARGB : AV_PIX_FMT_BGRA; |
||
| 187 | else if (rgb[0] == 0xFF && rgb[1] == 0xFF00 && rgb[2] == 0xFF0000) |
||
| 188 | avctx->pix_fmt = be ? AV_PIX_FMT_ABGR : AV_PIX_FMT_RGBA; |
||
| 189 | } |
||
| 190 | bytestream2_skipu(&gb, ncolors * XWD_CMAP_SIZE); |
||
| 191 | break; |
||
| 192 | default: |
||
| 193 | av_log(avctx, AV_LOG_ERROR, "invalid visual class\n"); |
||
| 194 | return AVERROR_INVALIDDATA; |
||
| 195 | } |
||
| 196 | |||
| 197 | if (avctx->pix_fmt == AV_PIX_FMT_NONE) { |
||
| 198 | avpriv_request_sample(avctx, |
||
| 199 | "Unknown file: bpp %d, pixdepth %d, vclass %d", |
||
| 200 | bpp, pixdepth, vclass); |
||
| 201 | return AVERROR_PATCHWELCOME; |
||
| 202 | } |
||
| 203 | |||
| 204 | if ((ret = ff_get_buffer(avctx, p, 0)) < 0) |
||
| 205 | return ret; |
||
| 206 | |||
| 207 | p->key_frame = 1; |
||
| 208 | p->pict_type = AV_PICTURE_TYPE_I; |
||
| 209 | |||
| 210 | if (avctx->pix_fmt == AV_PIX_FMT_PAL8) { |
||
| 211 | uint32_t *dst = (uint32_t *)p->data[1]; |
||
| 212 | uint8_t red, green, blue; |
||
| 213 | |||
| 214 | for (i = 0; i < ncolors; i++) { |
||
| 215 | |||
| 216 | bytestream2_skipu(&gb, 4); // skip colormap entry number |
||
| 217 | red = bytestream2_get_byteu(&gb); |
||
| 218 | bytestream2_skipu(&gb, 1); |
||
| 219 | green = bytestream2_get_byteu(&gb); |
||
| 220 | bytestream2_skipu(&gb, 1); |
||
| 221 | blue = bytestream2_get_byteu(&gb); |
||
| 222 | bytestream2_skipu(&gb, 3); // skip bitmask flag and padding |
||
| 223 | |||
| 224 | dst[i] = red << 16 | green << 8 | blue; |
||
| 225 | } |
||
| 226 | } |
||
| 227 | |||
| 228 | ptr = p->data[0]; |
||
| 229 | for (i = 0; i < avctx->height; i++) { |
||
| 230 | bytestream2_get_bufferu(&gb, ptr, rsize); |
||
| 231 | bytestream2_skipu(&gb, lsize - rsize); |
||
| 232 | ptr += p->linesize[0]; |
||
| 233 | } |
||
| 234 | |||
| 235 | *got_frame = 1; |
||
| 236 | |||
| 237 | return buf_size; |
||
| 238 | } |
||
| 239 | |||
| 240 | AVCodec ff_xwd_decoder = { |
||
| 241 | .name = "xwd", |
||
| 242 | .long_name = NULL_IF_CONFIG_SMALL("XWD (X Window Dump) image"), |
||
| 243 | .type = AVMEDIA_TYPE_VIDEO, |
||
| 244 | .id = AV_CODEC_ID_XWD, |
||
| 245 | .decode = xwd_decode_frame, |
||
| 246 | .capabilities = CODEC_CAP_DR1, |
||
| 247 | }; |