| /* | |
| * 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 "codec_internal.h" | |
| #include "decode.h" | |
| #include "xwd.h" | |
| static int xwd_decode_frame(AVCodecContext *avctx, AVFrame *p, | |
| int *got_frame, AVPacket *avpkt) | |
| { | |
| 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; | |
| int width, height; | |
| GetByteContext gb; | |
| int ret; | |
| if (avpkt->size < XWD_HEADER_SIZE) | |
| return AVERROR_INVALIDDATA; | |
| bytestream2_init(&gb, avpkt->data, avpkt->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 (avpkt->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); | |
| width = bytestream2_get_be32u(&gb); | |
| 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)); | |
| if ((ret = ff_set_dimensions(avctx, width, height)) < 0) | |
| return ret; | |
| 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 (bpp == 1 && pixdepth == 1) { | |
| avctx->pix_fmt = AV_PIX_FMT_MONOWHITE; | |
| } else if (bpp == 8 && 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 (avctx->skip_frame >= AVDISCARD_ALL) | |
| return avpkt->size; | |
| if ((ret = ff_get_buffer(avctx, p, 0)) < 0) | |
| return ret; | |
| p->flags |= AV_FRAME_FLAG_KEY; | |
| 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 (int 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] = 0xFFU << 24 | red << 16 | green << 8 | blue; | |
| } | |
| } | |
| ptr = p->data[0]; | |
| for (int 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 avpkt->size; | |
| } | |
| const FFCodec ff_xwd_decoder = { | |
| .p.name = "xwd", | |
| CODEC_LONG_NAME("XWD (X Window Dump) image"), | |
| .p.type = AVMEDIA_TYPE_VIDEO, | |
| .p.id = AV_CODEC_ID_XWD, | |
| .p.capabilities = AV_CODEC_CAP_DR1, | |
| .caps_internal = FF_CODEC_CAP_SKIP_FRAME_FILL_PARAM, | |
| FF_CODEC_DECODE_CB(xwd_decode_frame), | |
| }; |