4 * Copyright (c) 2012 Paul B Mahol
6 * This file is part of FFmpeg.
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.
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.
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
25 #include "libavutil/imgutils.h"
27 #include "bytestream.h"
31 static int xwd_decode_frame(AVCodecContext *avctx, void *data,
32 int *got_frame, AVPacket *avpkt)
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;
44 if (buf_size < XWD_HEADER_SIZE)
45 return AVERROR_INVALIDDATA;
47 bytestream2_init(&gb, buf, buf_size);
48 header_size = bytestream2_get_be32u(&gb);
50 version = bytestream2_get_be32u(&gb);
51 if (version != XWD_VERSION) {
52 av_log(avctx, AV_LOG_ERROR, "unsupported version\n");
53 return AVERROR_INVALIDDATA;
56 if (buf_size < header_size || header_size < XWD_HEADER_SIZE) {
57 av_log(avctx, AV_LOG_ERROR, "invalid header size\n");
58 return AVERROR_INVALIDDATA;
61 pixformat = bytestream2_get_be32u(&gb);
62 pixdepth = bytestream2_get_be32u(&gb);
63 avctx->width = bytestream2_get_be32u(&gb);
64 avctx->height = bytestream2_get_be32u(&gb);
65 xoffset = bytestream2_get_be32u(&gb);
66 be = bytestream2_get_be32u(&gb);
67 bunit = bytestream2_get_be32u(&gb);
68 bitorder = bytestream2_get_be32u(&gb);
69 bpad = bytestream2_get_be32u(&gb);
70 bpp = bytestream2_get_be32u(&gb);
71 lsize = bytestream2_get_be32u(&gb);
72 vclass = bytestream2_get_be32u(&gb);
73 rgb[0] = bytestream2_get_be32u(&gb);
74 rgb[1] = bytestream2_get_be32u(&gb);
75 rgb[2] = bytestream2_get_be32u(&gb);
76 bytestream2_skipu(&gb, 8);
77 ncolors = bytestream2_get_be32u(&gb);
78 bytestream2_skipu(&gb, header_size - (XWD_HEADER_SIZE - 20));
80 av_log(avctx, AV_LOG_DEBUG,
81 "pixformat %"PRIu32", pixdepth %"PRIu32", bunit %"PRIu32", bitorder %"PRIu32", bpad %"PRIu32"\n",
82 pixformat, pixdepth, bunit, bitorder, bpad);
83 av_log(avctx, AV_LOG_DEBUG,
84 "vclass %"PRIu32", ncolors %"PRIu32", bpp %"PRIu32", be %"PRIu32", lsize %"PRIu32", xoffset %"PRIu32"\n",
85 vclass, ncolors, bpp, be, lsize, xoffset);
86 av_log(avctx, AV_LOG_DEBUG, "red %0x, green %0x, blue %0x\n", rgb[0], rgb[1], rgb[2]);
88 if (pixformat > XWD_Z_PIXMAP) {
89 av_log(avctx, AV_LOG_ERROR, "invalid pixmap format\n");
90 return AVERROR_INVALIDDATA;
93 if (pixdepth == 0 || pixdepth > 32) {
94 av_log(avctx, AV_LOG_ERROR, "invalid pixmap depth\n");
95 return AVERROR_INVALIDDATA;
99 avpriv_request_sample(avctx, "xoffset %"PRIu32"", xoffset);
100 return AVERROR_PATCHWELCOME;
104 av_log(avctx, AV_LOG_ERROR, "invalid byte order\n");
105 return AVERROR_INVALIDDATA;
109 av_log(avctx, AV_LOG_ERROR, "invalid bitmap bit order\n");
110 return AVERROR_INVALIDDATA;
113 if (bunit != 8 && bunit != 16 && bunit != 32) {
114 av_log(avctx, AV_LOG_ERROR, "invalid bitmap unit\n");
115 return AVERROR_INVALIDDATA;
118 if (bpad != 8 && bpad != 16 && bpad != 32) {
119 av_log(avctx, AV_LOG_ERROR, "invalid bitmap scan-line pad\n");
120 return AVERROR_INVALIDDATA;
123 if (bpp == 0 || bpp > 32) {
124 av_log(avctx, AV_LOG_ERROR, "invalid bits per pixel\n");
125 return AVERROR_INVALIDDATA;
129 av_log(avctx, AV_LOG_ERROR, "invalid number of entries in colormap\n");
130 return AVERROR_INVALIDDATA;
133 if ((ret = av_image_check_size(avctx->width, avctx->height, 0, NULL)) < 0)
136 rsize = FFALIGN(avctx->width * bpp, bpad) / 8;
138 av_log(avctx, AV_LOG_ERROR, "invalid bytes per scan-line\n");
139 return AVERROR_INVALIDDATA;
142 if (bytestream2_get_bytes_left(&gb) < ncolors * XWD_CMAP_SIZE + avctx->height * lsize) {
143 av_log(avctx, AV_LOG_ERROR, "input buffer too small\n");
144 return AVERROR_INVALIDDATA;
147 if (pixformat != XWD_Z_PIXMAP) {
148 avpriv_report_missing_feature(avctx, "Pixmap format %"PRIu32, pixformat);
149 return AVERROR_PATCHWELCOME;
152 avctx->pix_fmt = AV_PIX_FMT_NONE;
154 case XWD_STATIC_GRAY:
156 if (bpp != 1 && bpp != 8)
157 return AVERROR_INVALIDDATA;
159 avctx->pix_fmt = AV_PIX_FMT_MONOWHITE;
160 } else if (pixdepth == 8) {
161 avctx->pix_fmt = AV_PIX_FMT_GRAY8;
164 case XWD_STATIC_COLOR:
165 case XWD_PSEUDO_COLOR:
167 avctx->pix_fmt = AV_PIX_FMT_PAL8;
170 case XWD_DIRECT_COLOR:
171 if (bpp != 16 && bpp != 24 && bpp != 32)
172 return AVERROR_INVALIDDATA;
173 if (bpp == 16 && pixdepth == 15) {
174 if (rgb[0] == 0x7C00 && rgb[1] == 0x3E0 && rgb[2] == 0x1F)
175 avctx->pix_fmt = be ? AV_PIX_FMT_RGB555BE : AV_PIX_FMT_RGB555LE;
176 else if (rgb[0] == 0x1F && rgb[1] == 0x3E0 && rgb[2] == 0x7C00)
177 avctx->pix_fmt = be ? AV_PIX_FMT_BGR555BE : AV_PIX_FMT_BGR555LE;
178 } else if (bpp == 16 && pixdepth == 16) {
179 if (rgb[0] == 0xF800 && rgb[1] == 0x7E0 && rgb[2] == 0x1F)
180 avctx->pix_fmt = be ? AV_PIX_FMT_RGB565BE : AV_PIX_FMT_RGB565LE;
181 else if (rgb[0] == 0x1F && rgb[1] == 0x7E0 && rgb[2] == 0xF800)
182 avctx->pix_fmt = be ? AV_PIX_FMT_BGR565BE : AV_PIX_FMT_BGR565LE;
183 } else if (bpp == 24) {
184 if (rgb[0] == 0xFF0000 && rgb[1] == 0xFF00 && rgb[2] == 0xFF)
185 avctx->pix_fmt = be ? AV_PIX_FMT_RGB24 : AV_PIX_FMT_BGR24;
186 else if (rgb[0] == 0xFF && rgb[1] == 0xFF00 && rgb[2] == 0xFF0000)
187 avctx->pix_fmt = be ? AV_PIX_FMT_BGR24 : AV_PIX_FMT_RGB24;
188 } else if (bpp == 32) {
189 if (rgb[0] == 0xFF0000 && rgb[1] == 0xFF00 && rgb[2] == 0xFF)
190 avctx->pix_fmt = be ? AV_PIX_FMT_ARGB : AV_PIX_FMT_BGRA;
191 else if (rgb[0] == 0xFF && rgb[1] == 0xFF00 && rgb[2] == 0xFF0000)
192 avctx->pix_fmt = be ? AV_PIX_FMT_ABGR : AV_PIX_FMT_RGBA;
194 bytestream2_skipu(&gb, ncolors * XWD_CMAP_SIZE);
197 av_log(avctx, AV_LOG_ERROR, "invalid visual class\n");
198 return AVERROR_INVALIDDATA;
201 if (avctx->pix_fmt == AV_PIX_FMT_NONE) {
202 avpriv_request_sample(avctx,
203 "Unknown file: bpp %"PRIu32", pixdepth %"PRIu32", vclass %"PRIu32"",
204 bpp, pixdepth, vclass);
205 return AVERROR_PATCHWELCOME;
208 if ((ret = ff_get_buffer(avctx, p, 0)) < 0)
212 p->pict_type = AV_PICTURE_TYPE_I;
214 if (avctx->pix_fmt == AV_PIX_FMT_PAL8) {
215 uint32_t *dst = (uint32_t *)p->data[1];
216 uint8_t red, green, blue;
218 for (i = 0; i < ncolors; i++) {
220 bytestream2_skipu(&gb, 4); // skip colormap entry number
221 red = bytestream2_get_byteu(&gb);
222 bytestream2_skipu(&gb, 1);
223 green = bytestream2_get_byteu(&gb);
224 bytestream2_skipu(&gb, 1);
225 blue = bytestream2_get_byteu(&gb);
226 bytestream2_skipu(&gb, 3); // skip bitmask flag and padding
228 dst[i] = red << 16 | green << 8 | blue;
233 for (i = 0; i < avctx->height; i++) {
234 bytestream2_get_bufferu(&gb, ptr, rsize);
235 bytestream2_skipu(&gb, lsize - rsize);
236 ptr += p->linesize[0];
244 AVCodec ff_xwd_decoder = {
246 .long_name = NULL_IF_CONFIG_SMALL("XWD (X Window Dump) image"),
247 .type = AVMEDIA_TYPE_VIDEO,
248 .id = AV_CODEC_ID_XWD,
249 .decode = xwd_decode_frame,
250 .capabilities = CODEC_CAP_DR1,