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"
28 #include "codec_internal.h"
32 static int xwd_decode_frame(AVCodecContext *avctx, AVFrame *p,
33 int *got_frame, AVPacket *avpkt)
35 uint32_t version, header_size, vclass, ncolors;
36 uint32_t xoffset, be, bpp, lsize, rsize;
37 uint32_t pixformat, pixdepth, bunit, bitorder, bpad;
44 if (avpkt->size < XWD_HEADER_SIZE)
45 return AVERROR_INVALIDDATA;
47 bytestream2_init(&gb, avpkt->data, avpkt->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 (avpkt->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 width = bytestream2_get_be32u(&gb);
64 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 if ((ret = ff_set_dimensions(avctx, width, height)) < 0)
83 av_log(avctx, AV_LOG_DEBUG,
84 "pixformat %"PRIu32", pixdepth %"PRIu32", bunit %"PRIu32", bitorder %"PRIu32", bpad %"PRIu32"\n",
85 pixformat, pixdepth, bunit, bitorder, bpad);
86 av_log(avctx, AV_LOG_DEBUG,
87 "vclass %"PRIu32", ncolors %"PRIu32", bpp %"PRIu32", be %"PRIu32", lsize %"PRIu32", xoffset %"PRIu32"\n",
88 vclass, ncolors, bpp, be, lsize, xoffset);
89 av_log(avctx, AV_LOG_DEBUG,
90 "red %0"PRIx32", green %0"PRIx32", blue %0"PRIx32"\n",
91 rgb[0], rgb[1], rgb[2]);
93 if (pixformat > XWD_Z_PIXMAP) {
94 av_log(avctx, AV_LOG_ERROR, "invalid pixmap format\n");
95 return AVERROR_INVALIDDATA;
98 if (pixdepth == 0 || pixdepth > 32) {
99 av_log(avctx, AV_LOG_ERROR, "invalid pixmap depth\n");
100 return AVERROR_INVALIDDATA;
104 avpriv_request_sample(avctx, "xoffset %"PRIu32"", xoffset);
105 return AVERROR_PATCHWELCOME;
109 av_log(avctx, AV_LOG_ERROR, "invalid byte order\n");
110 return AVERROR_INVALIDDATA;
114 av_log(avctx, AV_LOG_ERROR, "invalid bitmap bit order\n");
115 return AVERROR_INVALIDDATA;
118 if (bunit != 8 && bunit != 16 && bunit != 32) {
119 av_log(avctx, AV_LOG_ERROR, "invalid bitmap unit\n");
120 return AVERROR_INVALIDDATA;
123 if (bpad != 8 && bpad != 16 && bpad != 32) {
124 av_log(avctx, AV_LOG_ERROR, "invalid bitmap scan-line pad\n");
125 return AVERROR_INVALIDDATA;
128 if (bpp == 0 || bpp > 32) {
129 av_log(avctx, AV_LOG_ERROR, "invalid bits per pixel\n");
130 return AVERROR_INVALIDDATA;
134 av_log(avctx, AV_LOG_ERROR, "invalid number of entries in colormap\n");
135 return AVERROR_INVALIDDATA;
138 if ((ret = av_image_check_size(avctx->width, avctx->height, 0, NULL)) < 0)
141 rsize = FFALIGN(avctx->width * bpp, bpad) / 8;
143 av_log(avctx, AV_LOG_ERROR, "invalid bytes per scan-line\n");
144 return AVERROR_INVALIDDATA;
147 if (bytestream2_get_bytes_left(&gb) < ncolors * XWD_CMAP_SIZE + (uint64_t)avctx->height * lsize) {
148 av_log(avctx, AV_LOG_ERROR, "input buffer too small\n");
149 return AVERROR_INVALIDDATA;
152 if (pixformat != XWD_Z_PIXMAP) {
153 avpriv_report_missing_feature(avctx, "Pixmap format %"PRIu32, pixformat);
154 return AVERROR_PATCHWELCOME;
157 avctx->pix_fmt = AV_PIX_FMT_NONE;
159 case XWD_STATIC_GRAY:
161 if (bpp != 1 && bpp != 8)
162 return AVERROR_INVALIDDATA;
163 if (bpp == 1 && pixdepth == 1) {
164 avctx->pix_fmt = AV_PIX_FMT_MONOWHITE;
165 } else if (bpp == 8 && pixdepth == 8) {
166 avctx->pix_fmt = AV_PIX_FMT_GRAY8;
169 case XWD_STATIC_COLOR:
170 case XWD_PSEUDO_COLOR:
172 avctx->pix_fmt = AV_PIX_FMT_PAL8;
175 case XWD_DIRECT_COLOR:
176 if (bpp != 16 && bpp != 24 && bpp != 32)
177 return AVERROR_INVALIDDATA;
178 if (bpp == 16 && pixdepth == 15) {
179 if (rgb[0] == 0x7C00 && rgb[1] == 0x3E0 && rgb[2] == 0x1F)
180 avctx->pix_fmt = be ? AV_PIX_FMT_RGB555BE : AV_PIX_FMT_RGB555LE;
181 else if (rgb[0] == 0x1F && rgb[1] == 0x3E0 && rgb[2] == 0x7C00)
182 avctx->pix_fmt = be ? AV_PIX_FMT_BGR555BE : AV_PIX_FMT_BGR555LE;
183 } else if (bpp == 16 && pixdepth == 16) {
184 if (rgb[0] == 0xF800 && rgb[1] == 0x7E0 && rgb[2] == 0x1F)
185 avctx->pix_fmt = be ? AV_PIX_FMT_RGB565BE : AV_PIX_FMT_RGB565LE;
186 else if (rgb[0] == 0x1F && rgb[1] == 0x7E0 && rgb[2] == 0xF800)
187 avctx->pix_fmt = be ? AV_PIX_FMT_BGR565BE : AV_PIX_FMT_BGR565LE;
188 } else if (bpp == 24) {
189 if (rgb[0] == 0xFF0000 && rgb[1] == 0xFF00 && rgb[2] == 0xFF)
190 avctx->pix_fmt = be ? AV_PIX_FMT_RGB24 : AV_PIX_FMT_BGR24;
191 else if (rgb[0] == 0xFF && rgb[1] == 0xFF00 && rgb[2] == 0xFF0000)
192 avctx->pix_fmt = be ? AV_PIX_FMT_BGR24 : AV_PIX_FMT_RGB24;
193 } else if (bpp == 32) {
194 if (rgb[0] == 0xFF0000 && rgb[1] == 0xFF00 && rgb[2] == 0xFF)
195 avctx->pix_fmt = be ? AV_PIX_FMT_ARGB : AV_PIX_FMT_BGRA;
196 else if (rgb[0] == 0xFF && rgb[1] == 0xFF00 && rgb[2] == 0xFF0000)
197 avctx->pix_fmt = be ? AV_PIX_FMT_ABGR : AV_PIX_FMT_RGBA;
199 bytestream2_skipu(&gb, ncolors * XWD_CMAP_SIZE);
202 av_log(avctx, AV_LOG_ERROR, "invalid visual class\n");
203 return AVERROR_INVALIDDATA;
206 if (avctx->pix_fmt == AV_PIX_FMT_NONE) {
207 avpriv_request_sample(avctx,
208 "Unknown file: bpp %"PRIu32", pixdepth %"PRIu32", vclass %"PRIu32"",
209 bpp, pixdepth, vclass);
210 return AVERROR_PATCHWELCOME;
213 if (avctx->skip_frame >= AVDISCARD_ALL)
216 if ((ret = ff_get_buffer(avctx, p, 0)) < 0)
219 p->flags |= AV_FRAME_FLAG_KEY;
220 p->pict_type = AV_PICTURE_TYPE_I;
222 if (avctx->pix_fmt == AV_PIX_FMT_PAL8) {
223 uint32_t *dst = (uint32_t *)p->data[1];
224 uint8_t red, green, blue;
226 for (int i = 0; i < ncolors; i++) {
227 bytestream2_skipu(&gb, 4); // skip colormap entry number
228 red = bytestream2_get_byteu(&gb);
229 bytestream2_skipu(&gb, 1);
230 green = bytestream2_get_byteu(&gb);
231 bytestream2_skipu(&gb, 1);
232 blue = bytestream2_get_byteu(&gb);
233 bytestream2_skipu(&gb, 3); // skip bitmask flag and padding
235 dst[i] = 0xFFU << 24 | red << 16 | green << 8 | blue;
240 for (int i = 0; i < avctx->height; i++) {
241 bytestream2_get_bufferu(&gb, ptr, rsize);
242 bytestream2_skipu(&gb, lsize - rsize);
243 ptr += p->linesize[0];
251 const FFCodec ff_xwd_decoder = {
253 CODEC_LONG_NAME("XWD (X Window Dump) image"),
254 .p.type = AVMEDIA_TYPE_VIDEO,
255 .p.id = AV_CODEC_ID_XWD,
256 .p.capabilities = AV_CODEC_CAP_DR1,
257 .caps_internal = FF_CODEC_CAP_SKIP_FRAME_FILL_PARAM,
258 FF_CODEC_DECODE_CB(xwd_decode_frame),