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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 <inttypes.h> | |
24 | ||
25 | #include "libavutil/imgutils.h" | |
26 | #include "avcodec.h" | |
27 | #include "bytestream.h" | |
28 | #include "internal.h" | |
29 | #include "xwd.h" | |
30 | ||
31 | static int xwd_decode_frame(AVCodecContext *avctx, void *data, | |
32 | int *got_frame, AVPacket *avpkt) | |
33 | { | |
34 | AVFrame *p = data; | |
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; | |
40 | uint32_t rgb[3]; | |
41 | uint8_t *ptr; | |
42 | GetByteContext gb; | |
43 | ||
44 | if (buf_size < XWD_HEADER_SIZE) | |
45 | return AVERROR_INVALIDDATA; | |
46 | ||
47 | bytestream2_init(&gb, buf, buf_size); | |
48 | header_size = bytestream2_get_be32u(&gb); | |
49 | ||
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; | |
54 | } | |
55 | ||
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; | |
59 | } | |
60 | ||
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)); | |
79 | ||
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, | |
87 | "red %0"PRIx32", green %0"PRIx32", blue %0"PRIx32"\n", | |
88 | rgb[0], rgb[1], rgb[2]); | |
89 | ||
90 | if (pixformat > XWD_Z_PIXMAP) { | |
91 | av_log(avctx, AV_LOG_ERROR, "invalid pixmap format\n"); | |
92 | return AVERROR_INVALIDDATA; | |
93 | } | |
94 | ||
95 | if (pixdepth == 0 || pixdepth > 32) { | |
96 | av_log(avctx, AV_LOG_ERROR, "invalid pixmap depth\n"); | |
97 | return AVERROR_INVALIDDATA; | |
98 | } | |
99 | ||
100 | if (xoffset) { | |
101 | avpriv_request_sample(avctx, "xoffset %"PRIu32"", xoffset); | |
102 | return AVERROR_PATCHWELCOME; | |
103 | } | |
104 | ||
105 | if (be > 1) { | |
106 | av_log(avctx, AV_LOG_ERROR, "invalid byte order\n"); | |
107 | return AVERROR_INVALIDDATA; | |
108 | } | |
109 | ||
110 | if (bitorder > 1) { | |
111 | av_log(avctx, AV_LOG_ERROR, "invalid bitmap bit order\n"); | |
112 | return AVERROR_INVALIDDATA; | |
113 | } | |
114 | ||
115 | if (bunit != 8 && bunit != 16 && bunit != 32) { | |
116 | av_log(avctx, AV_LOG_ERROR, "invalid bitmap unit\n"); | |
117 | return AVERROR_INVALIDDATA; | |
118 | } | |
119 | ||
120 | if (bpad != 8 && bpad != 16 && bpad != 32) { | |
121 | av_log(avctx, AV_LOG_ERROR, "invalid bitmap scan-line pad\n"); | |
122 | return AVERROR_INVALIDDATA; | |
123 | } | |
124 | ||
125 | if (bpp == 0 || bpp > 32) { | |
126 | av_log(avctx, AV_LOG_ERROR, "invalid bits per pixel\n"); | |
127 | return AVERROR_INVALIDDATA; | |
128 | } | |
129 | ||
130 | if (ncolors > 256) { | |
131 | av_log(avctx, AV_LOG_ERROR, "invalid number of entries in colormap\n"); | |
132 | return AVERROR_INVALIDDATA; | |
133 | } | |
134 | ||
135 | if ((ret = av_image_check_size(avctx->width, avctx->height, 0, NULL)) < 0) | |
136 | return ret; | |
137 | ||
138 | rsize = FFALIGN(avctx->width * bpp, bpad) / 8; | |
139 | if (lsize < rsize) { | |
140 | av_log(avctx, AV_LOG_ERROR, "invalid bytes per scan-line\n"); | |
141 | return AVERROR_INVALIDDATA; | |
142 | } | |
143 | ||
144 | if (bytestream2_get_bytes_left(&gb) < ncolors * XWD_CMAP_SIZE + avctx->height * lsize) { | |
145 | av_log(avctx, AV_LOG_ERROR, "input buffer too small\n"); | |
146 | return AVERROR_INVALIDDATA; | |
147 | } | |
148 | ||
149 | if (pixformat != XWD_Z_PIXMAP) { | |
150 | avpriv_report_missing_feature(avctx, "Pixmap format %"PRIu32, pixformat); | |
151 | return AVERROR_PATCHWELCOME; | |
152 | } | |
153 | ||
154 | avctx->pix_fmt = AV_PIX_FMT_NONE; | |
155 | switch (vclass) { | |
156 | case XWD_STATIC_GRAY: | |
157 | case XWD_GRAY_SCALE: | |
158 | if (bpp != 1 && bpp != 8) | |
159 | return AVERROR_INVALIDDATA; | |
160 | if (pixdepth == 1) { | |
161 | avctx->pix_fmt = AV_PIX_FMT_MONOWHITE; | |
162 | } else if (pixdepth == 8) { | |
163 | avctx->pix_fmt = AV_PIX_FMT_GRAY8; | |
164 | } | |
165 | break; | |
166 | case XWD_STATIC_COLOR: | |
167 | case XWD_PSEUDO_COLOR: | |
168 | if (bpp == 8) | |
169 | avctx->pix_fmt = AV_PIX_FMT_PAL8; | |
170 | break; | |
171 | case XWD_TRUE_COLOR: | |
172 | case XWD_DIRECT_COLOR: | |
173 | if (bpp != 16 && bpp != 24 && bpp != 32) | |
174 | return AVERROR_INVALIDDATA; | |
175 | if (bpp == 16 && pixdepth == 15) { | |
176 | if (rgb[0] == 0x7C00 && rgb[1] == 0x3E0 && rgb[2] == 0x1F) | |
177 | avctx->pix_fmt = be ? AV_PIX_FMT_RGB555BE : AV_PIX_FMT_RGB555LE; | |
178 | else if (rgb[0] == 0x1F && rgb[1] == 0x3E0 && rgb[2] == 0x7C00) | |
179 | avctx->pix_fmt = be ? AV_PIX_FMT_BGR555BE : AV_PIX_FMT_BGR555LE; | |
180 | } else if (bpp == 16 && pixdepth == 16) { | |
181 | if (rgb[0] == 0xF800 && rgb[1] == 0x7E0 && rgb[2] == 0x1F) | |
182 | avctx->pix_fmt = be ? AV_PIX_FMT_RGB565BE : AV_PIX_FMT_RGB565LE; | |
183 | else if (rgb[0] == 0x1F && rgb[1] == 0x7E0 && rgb[2] == 0xF800) | |
184 | avctx->pix_fmt = be ? AV_PIX_FMT_BGR565BE : AV_PIX_FMT_BGR565LE; | |
185 | } else if (bpp == 24) { | |
186 | if (rgb[0] == 0xFF0000 && rgb[1] == 0xFF00 && rgb[2] == 0xFF) | |
187 | avctx->pix_fmt = be ? AV_PIX_FMT_RGB24 : AV_PIX_FMT_BGR24; | |
188 | else if (rgb[0] == 0xFF && rgb[1] == 0xFF00 && rgb[2] == 0xFF0000) | |
189 | avctx->pix_fmt = be ? AV_PIX_FMT_BGR24 : AV_PIX_FMT_RGB24; | |
190 | } else if (bpp == 32) { | |
191 | if (rgb[0] == 0xFF0000 && rgb[1] == 0xFF00 && rgb[2] == 0xFF) | |
192 | avctx->pix_fmt = be ? AV_PIX_FMT_ARGB : AV_PIX_FMT_BGRA; | |
193 | else if (rgb[0] == 0xFF && rgb[1] == 0xFF00 && rgb[2] == 0xFF0000) | |
194 | avctx->pix_fmt = be ? AV_PIX_FMT_ABGR : AV_PIX_FMT_RGBA; | |
195 | } | |
196 | bytestream2_skipu(&gb, ncolors * XWD_CMAP_SIZE); | |
197 | break; | |
198 | default: | |
199 | av_log(avctx, AV_LOG_ERROR, "invalid visual class\n"); | |
200 | return AVERROR_INVALIDDATA; | |
201 | } | |
202 | ||
203 | if (avctx->pix_fmt == AV_PIX_FMT_NONE) { | |
204 | avpriv_request_sample(avctx, | |
205 | "Unknown file: bpp %"PRIu32", pixdepth %"PRIu32", vclass %"PRIu32"", | |
206 | bpp, pixdepth, vclass); | |
207 | return AVERROR_PATCHWELCOME; | |
208 | } | |
209 | ||
210 | if ((ret = ff_get_buffer(avctx, p, 0)) < 0) | |
211 | return ret; | |
212 | ||
213 | p->key_frame = 1; | |
214 | p->pict_type = AV_PICTURE_TYPE_I; | |
215 | ||
216 | if (avctx->pix_fmt == AV_PIX_FMT_PAL8) { | |
217 | uint32_t *dst = (uint32_t *)p->data[1]; | |
218 | uint8_t red, green, blue; | |
219 | ||
220 | for (i = 0; i < ncolors; i++) { | |
221 | ||
222 | bytestream2_skipu(&gb, 4); // skip colormap entry number | |
223 | red = bytestream2_get_byteu(&gb); | |
224 | bytestream2_skipu(&gb, 1); | |
225 | green = bytestream2_get_byteu(&gb); | |
226 | bytestream2_skipu(&gb, 1); | |
227 | blue = bytestream2_get_byteu(&gb); | |
228 | bytestream2_skipu(&gb, 3); // skip bitmask flag and padding | |
229 | ||
230 | dst[i] = red << 16 | green << 8 | blue; | |
231 | } | |
232 | } | |
233 | ||
234 | ptr = p->data[0]; | |
235 | for (i = 0; i < avctx->height; i++) { | |
236 | bytestream2_get_bufferu(&gb, ptr, rsize); | |
237 | bytestream2_skipu(&gb, lsize - rsize); | |
238 | ptr += p->linesize[0]; | |
239 | } | |
240 | ||
241 | *got_frame = 1; | |
242 | ||
243 | return buf_size; | |
244 | } | |
245 | ||
246 | AVCodec ff_xwd_decoder = { | |
247 | .name = "xwd", | |
248 | .long_name = NULL_IF_CONFIG_SMALL("XWD (X Window Dump) image"), | |
249 | .type = AVMEDIA_TYPE_VIDEO, | |
250 | .id = AV_CODEC_ID_XWD, | |
251 | .decode = xwd_decode_frame, | |
252 | .capabilities = CODEC_CAP_DR1, | |
253 | }; |