| /* |
| * XWD image format |
| * |
| * Copyright (c) 2012 Paul B Mahol |
| * |
| * This file is part of FFmpeg. |
| * |
| * FFmpeg is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU Lesser General Public |
| * License as published by the Free Software Foundation; either |
| * version 2.1 of the License, or (at your option) any later version. |
| * |
| * FFmpeg is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| * Lesser General Public License for more details. |
| * |
| * You should have received a copy of the GNU Lesser General Public |
| * License along with FFmpeg; if not, write to the Free Software |
| * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
| */ |
| |
| #include <inttypes.h> |
| |
| #include "libavutil/imgutils.h" |
| #include "avcodec.h" |
| #include "bytestream.h" |
| #include "internal.h" |
| #include "xwd.h" |
| |
| static int xwd_decode_frame(AVCodecContext *avctx, void *data, |
| int *got_frame, AVPacket *avpkt) |
| { |
| AVFrame *p = data; |
| const uint8_t *buf = avpkt->data; |
| int i, ret, buf_size = avpkt->size; |
| uint32_t version, header_size, vclass, ncolors; |
| uint32_t xoffset, be, bpp, lsize, rsize; |
| uint32_t pixformat, pixdepth, bunit, bitorder, bpad; |
| uint32_t rgb[3]; |
| uint8_t *ptr; |
| GetByteContext gb; |
| |
| if (buf_size < XWD_HEADER_SIZE) |
| return AVERROR_INVALIDDATA; |
| |
| bytestream2_init(&gb, buf, buf_size); |
| header_size = bytestream2_get_be32u(&gb); |
| |
| version = bytestream2_get_be32u(&gb); |
| if (version != XWD_VERSION) { |
| av_log(avctx, AV_LOG_ERROR, "unsupported version\n"); |
| return AVERROR_INVALIDDATA; |
| } |
| |
| if (buf_size < header_size || header_size < XWD_HEADER_SIZE) { |
| av_log(avctx, AV_LOG_ERROR, "invalid header size\n"); |
| return AVERROR_INVALIDDATA; |
| } |
| |
| pixformat = bytestream2_get_be32u(&gb); |
| pixdepth = bytestream2_get_be32u(&gb); |
| avctx->width = bytestream2_get_be32u(&gb); |
| avctx->height = bytestream2_get_be32u(&gb); |
| xoffset = bytestream2_get_be32u(&gb); |
| be = bytestream2_get_be32u(&gb); |
| bunit = bytestream2_get_be32u(&gb); |
| bitorder = bytestream2_get_be32u(&gb); |
| bpad = bytestream2_get_be32u(&gb); |
| bpp = bytestream2_get_be32u(&gb); |
| lsize = bytestream2_get_be32u(&gb); |
| vclass = bytestream2_get_be32u(&gb); |
| rgb[0] = bytestream2_get_be32u(&gb); |
| rgb[1] = bytestream2_get_be32u(&gb); |
| rgb[2] = bytestream2_get_be32u(&gb); |
| bytestream2_skipu(&gb, 8); |
| ncolors = bytestream2_get_be32u(&gb); |
| bytestream2_skipu(&gb, header_size - (XWD_HEADER_SIZE - 20)); |
| |
| av_log(avctx, AV_LOG_DEBUG, |
| "pixformat %"PRIu32", pixdepth %"PRIu32", bunit %"PRIu32", bitorder %"PRIu32", bpad %"PRIu32"\n", |
| pixformat, pixdepth, bunit, bitorder, bpad); |
| av_log(avctx, AV_LOG_DEBUG, |
| "vclass %"PRIu32", ncolors %"PRIu32", bpp %"PRIu32", be %"PRIu32", lsize %"PRIu32", xoffset %"PRIu32"\n", |
| vclass, ncolors, bpp, be, lsize, xoffset); |
| av_log(avctx, AV_LOG_DEBUG, |
| "red %0"PRIx32", green %0"PRIx32", blue %0"PRIx32"\n", |
| rgb[0], rgb[1], rgb[2]); |
| |
| if (pixformat > XWD_Z_PIXMAP) { |
| av_log(avctx, AV_LOG_ERROR, "invalid pixmap format\n"); |
| return AVERROR_INVALIDDATA; |
| } |
| |
| if (pixdepth == 0 || pixdepth > 32) { |
| av_log(avctx, AV_LOG_ERROR, "invalid pixmap depth\n"); |
| return AVERROR_INVALIDDATA; |
| } |
| |
| if (xoffset) { |
| avpriv_request_sample(avctx, "xoffset %"PRIu32"", xoffset); |
| return AVERROR_PATCHWELCOME; |
| } |
| |
| if (be > 1) { |
| av_log(avctx, AV_LOG_ERROR, "invalid byte order\n"); |
| return AVERROR_INVALIDDATA; |
| } |
| |
| if (bitorder > 1) { |
| av_log(avctx, AV_LOG_ERROR, "invalid bitmap bit order\n"); |
| return AVERROR_INVALIDDATA; |
| } |
| |
| if (bunit != 8 && bunit != 16 && bunit != 32) { |
| av_log(avctx, AV_LOG_ERROR, "invalid bitmap unit\n"); |
| return AVERROR_INVALIDDATA; |
| } |
| |
| if (bpad != 8 && bpad != 16 && bpad != 32) { |
| av_log(avctx, AV_LOG_ERROR, "invalid bitmap scan-line pad\n"); |
| return AVERROR_INVALIDDATA; |
| } |
| |
| if (bpp == 0 || bpp > 32) { |
| av_log(avctx, AV_LOG_ERROR, "invalid bits per pixel\n"); |
| return AVERROR_INVALIDDATA; |
| } |
| |
| if (ncolors > 256) { |
| av_log(avctx, AV_LOG_ERROR, "invalid number of entries in colormap\n"); |
| return AVERROR_INVALIDDATA; |
| } |
| |
| if ((ret = av_image_check_size(avctx->width, avctx->height, 0, NULL)) < 0) |
| return ret; |
| |
| rsize = FFALIGN(avctx->width * bpp, bpad) / 8; |
| if (lsize < rsize) { |
| av_log(avctx, AV_LOG_ERROR, "invalid bytes per scan-line\n"); |
| return AVERROR_INVALIDDATA; |
| } |
| |
| if (bytestream2_get_bytes_left(&gb) < ncolors * XWD_CMAP_SIZE + (uint64_t)avctx->height * lsize) { |
| av_log(avctx, AV_LOG_ERROR, "input buffer too small\n"); |
| return AVERROR_INVALIDDATA; |
| } |
| |
| if (pixformat != XWD_Z_PIXMAP) { |
| avpriv_report_missing_feature(avctx, "Pixmap format %"PRIu32, pixformat); |
| return AVERROR_PATCHWELCOME; |
| } |
| |
| avctx->pix_fmt = AV_PIX_FMT_NONE; |
| switch (vclass) { |
| case XWD_STATIC_GRAY: |
| case XWD_GRAY_SCALE: |
| if (bpp != 1 && bpp != 8) |
| return AVERROR_INVALIDDATA; |
| if (pixdepth == 1) { |
| avctx->pix_fmt = AV_PIX_FMT_MONOWHITE; |
| } else if (pixdepth == 8) { |
| avctx->pix_fmt = AV_PIX_FMT_GRAY8; |
| } |
| break; |
| case XWD_STATIC_COLOR: |
| case XWD_PSEUDO_COLOR: |
| if (bpp == 8) |
| avctx->pix_fmt = AV_PIX_FMT_PAL8; |
| break; |
| case XWD_TRUE_COLOR: |
| case XWD_DIRECT_COLOR: |
| if (bpp != 16 && bpp != 24 && bpp != 32) |
| return AVERROR_INVALIDDATA; |
| if (bpp == 16 && pixdepth == 15) { |
| if (rgb[0] == 0x7C00 && rgb[1] == 0x3E0 && rgb[2] == 0x1F) |
| avctx->pix_fmt = be ? AV_PIX_FMT_RGB555BE : AV_PIX_FMT_RGB555LE; |
| else if (rgb[0] == 0x1F && rgb[1] == 0x3E0 && rgb[2] == 0x7C00) |
| avctx->pix_fmt = be ? AV_PIX_FMT_BGR555BE : AV_PIX_FMT_BGR555LE; |
| } else if (bpp == 16 && pixdepth == 16) { |
| if (rgb[0] == 0xF800 && rgb[1] == 0x7E0 && rgb[2] == 0x1F) |
| avctx->pix_fmt = be ? AV_PIX_FMT_RGB565BE : AV_PIX_FMT_RGB565LE; |
| else if (rgb[0] == 0x1F && rgb[1] == 0x7E0 && rgb[2] == 0xF800) |
| avctx->pix_fmt = be ? AV_PIX_FMT_BGR565BE : AV_PIX_FMT_BGR565LE; |
| } else if (bpp == 24) { |
| if (rgb[0] == 0xFF0000 && rgb[1] == 0xFF00 && rgb[2] == 0xFF) |
| avctx->pix_fmt = be ? AV_PIX_FMT_RGB24 : AV_PIX_FMT_BGR24; |
| else if (rgb[0] == 0xFF && rgb[1] == 0xFF00 && rgb[2] == 0xFF0000) |
| avctx->pix_fmt = be ? AV_PIX_FMT_BGR24 : AV_PIX_FMT_RGB24; |
| } else if (bpp == 32) { |
| if (rgb[0] == 0xFF0000 && rgb[1] == 0xFF00 && rgb[2] == 0xFF) |
| avctx->pix_fmt = be ? AV_PIX_FMT_ARGB : AV_PIX_FMT_BGRA; |
| else if (rgb[0] == 0xFF && rgb[1] == 0xFF00 && rgb[2] == 0xFF0000) |
| avctx->pix_fmt = be ? AV_PIX_FMT_ABGR : AV_PIX_FMT_RGBA; |
| } |
| bytestream2_skipu(&gb, ncolors * XWD_CMAP_SIZE); |
| break; |
| default: |
| av_log(avctx, AV_LOG_ERROR, "invalid visual class\n"); |
| return AVERROR_INVALIDDATA; |
| } |
| |
| if (avctx->pix_fmt == AV_PIX_FMT_NONE) { |
| avpriv_request_sample(avctx, |
| "Unknown file: bpp %"PRIu32", pixdepth %"PRIu32", vclass %"PRIu32"", |
| bpp, pixdepth, vclass); |
| return AVERROR_PATCHWELCOME; |
| } |
| |
| if ((ret = ff_get_buffer(avctx, p, 0)) < 0) |
| return ret; |
| |
| p->key_frame = 1; |
| p->pict_type = AV_PICTURE_TYPE_I; |
| |
| if (avctx->pix_fmt == AV_PIX_FMT_PAL8) { |
| uint32_t *dst = (uint32_t *)p->data[1]; |
| uint8_t red, green, blue; |
| |
| for (i = 0; i < ncolors; i++) { |
| |
| bytestream2_skipu(&gb, 4); // skip colormap entry number |
| red = bytestream2_get_byteu(&gb); |
| bytestream2_skipu(&gb, 1); |
| green = bytestream2_get_byteu(&gb); |
| bytestream2_skipu(&gb, 1); |
| blue = bytestream2_get_byteu(&gb); |
| bytestream2_skipu(&gb, 3); // skip bitmask flag and padding |
| |
| dst[i] = red << 16 | green << 8 | blue; |
| } |
| } |
| |
| ptr = p->data[0]; |
| for (i = 0; i < avctx->height; i++) { |
| bytestream2_get_bufferu(&gb, ptr, rsize); |
| bytestream2_skipu(&gb, lsize - rsize); |
| ptr += p->linesize[0]; |
| } |
| |
| *got_frame = 1; |
| |
| return buf_size; |
| } |
| |
| AVCodec ff_xwd_decoder = { |
| .name = "xwd", |
| .long_name = NULL_IF_CONFIG_SMALL("XWD (X Window Dump) image"), |
| .type = AVMEDIA_TYPE_VIDEO, |
| .id = AV_CODEC_ID_XWD, |
| .decode = xwd_decode_frame, |
| .capabilities = AV_CODEC_CAP_DR1, |
| }; |
