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1 | /* |
2 | * Sun Rasterfile (.sun/.ras/im{1,8,24}/.sunras) image decoder | |
3 | * Copyright (c) 2007, 2008 Ivo van Poorten | |
4 | * | |
5 | * This file is part of FFmpeg. | |
6 | * | |
7 | * FFmpeg is free software; you can redistribute it and/or | |
8 | * modify it under the terms of the GNU Lesser General Public | |
9 | * License as published by the Free Software Foundation; either | |
10 | * version 2.1 of the License, or (at your option) any later version. | |
11 | * | |
12 | * FFmpeg is distributed in the hope that it will be useful, | |
13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
15 | * Lesser General Public License for more details. | |
16 | * | |
17 | * You should have received a copy of the GNU Lesser General Public | |
18 | * License along with FFmpeg; if not, write to the Free Software | |
19 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | |
20 | */ | |
21 | ||
22 | #include "libavutil/common.h" | |
23 | #include "libavutil/intreadwrite.h" | |
24 | #include "libavutil/imgutils.h" | |
25 | #include "avcodec.h" | |
26 | #include "internal.h" | |
27 | #include "sunrast.h" | |
28 | ||
29 | static int sunrast_decode_frame(AVCodecContext *avctx, void *data, | |
30 | int *got_frame, AVPacket *avpkt) | |
31 | { | |
32 | const uint8_t *buf = avpkt->data; | |
33 | const uint8_t *buf_end = avpkt->data + avpkt->size; | |
34 | AVFrame * const p = data; | |
35 | unsigned int w, h, depth, type, maptype, maplength, stride, x, y, len, alen; | |
36 | uint8_t *ptr, *ptr2 = NULL; | |
37 | const uint8_t *bufstart = buf; | |
38 | int ret; | |
39 | ||
40 | if (avpkt->size < 32) | |
41 | return AVERROR_INVALIDDATA; | |
42 | ||
43 | if (AV_RB32(buf) != RAS_MAGIC) { | |
44 | av_log(avctx, AV_LOG_ERROR, "this is not sunras encoded data\n"); | |
45 | return AVERROR_INVALIDDATA; | |
46 | } | |
47 | ||
48 | w = AV_RB32(buf + 4); | |
49 | h = AV_RB32(buf + 8); | |
50 | depth = AV_RB32(buf + 12); | |
51 | type = AV_RB32(buf + 20); | |
52 | maptype = AV_RB32(buf + 24); | |
53 | maplength = AV_RB32(buf + 28); | |
54 | buf += 32; | |
55 | ||
56 | if (type == RT_EXPERIMENTAL) { | |
57 | avpriv_request_sample(avctx, "TIFF/IFF/EXPERIMENTAL (compression) type"); | |
58 | return AVERROR_PATCHWELCOME; | |
59 | } | |
60 | if (type > RT_FORMAT_IFF) { | |
61 | av_log(avctx, AV_LOG_ERROR, "invalid (compression) type\n"); | |
62 | return AVERROR_INVALIDDATA; | |
63 | } | |
64 | if (maptype == RMT_RAW) { | |
65 | avpriv_request_sample(avctx, "Unknown colormap type"); | |
66 | return AVERROR_PATCHWELCOME; | |
67 | } | |
68 | if (maptype > RMT_RAW) { | |
69 | av_log(avctx, AV_LOG_ERROR, "invalid colormap type\n"); | |
70 | return AVERROR_INVALIDDATA; | |
71 | } | |
72 | ||
73 | if (type == RT_FORMAT_TIFF || type == RT_FORMAT_IFF) { | |
74 | av_log(avctx, AV_LOG_ERROR, "unsupported (compression) type\n"); | |
75 | return -1; | |
76 | } | |
77 | ||
78 | switch (depth) { | |
79 | case 1: | |
80 | avctx->pix_fmt = maplength ? AV_PIX_FMT_PAL8 : AV_PIX_FMT_MONOWHITE; | |
81 | break; | |
82 | case 4: | |
83 | avctx->pix_fmt = maplength ? AV_PIX_FMT_PAL8 : AV_PIX_FMT_NONE; | |
84 | break; | |
85 | case 8: | |
86 | avctx->pix_fmt = maplength ? AV_PIX_FMT_PAL8 : AV_PIX_FMT_GRAY8; | |
87 | break; | |
88 | case 24: | |
89 | avctx->pix_fmt = (type == RT_FORMAT_RGB) ? AV_PIX_FMT_RGB24 : AV_PIX_FMT_BGR24; | |
90 | break; | |
91 | case 32: | |
92 | avctx->pix_fmt = (type == RT_FORMAT_RGB) ? AV_PIX_FMT_0RGB : AV_PIX_FMT_0BGR; | |
93 | break; | |
94 | default: | |
95 | av_log(avctx, AV_LOG_ERROR, "invalid depth\n"); | |
96 | return AVERROR_INVALIDDATA; | |
97 | } | |
98 | ||
99 | ret = ff_set_dimensions(avctx, w, h); | |
100 | if (ret < 0) | |
101 | return ret; | |
102 | ||
103 | if ((ret = ff_get_buffer(avctx, p, 0)) < 0) | |
104 | return ret; | |
105 | ||
106 | p->pict_type = AV_PICTURE_TYPE_I; | |
107 | ||
108 | if (buf_end - buf < maplength) | |
109 | return AVERROR_INVALIDDATA; | |
110 | ||
111 | if (depth > 8 && maplength) { | |
112 | av_log(avctx, AV_LOG_WARNING, "useless colormap found or file is corrupted, trying to recover\n"); | |
113 | ||
114 | } else if (maplength) { | |
115 | unsigned int len = maplength / 3; | |
116 | ||
117 | if (maplength % 3 || maplength > 768) { | |
118 | av_log(avctx, AV_LOG_WARNING, "invalid colormap length\n"); | |
119 | return AVERROR_INVALIDDATA; | |
120 | } | |
121 | ||
122 | ptr = p->data[1]; | |
123 | for (x = 0; x < len; x++, ptr += 4) | |
124 | *(uint32_t *)ptr = (0xFFU<<24) + (buf[x]<<16) + (buf[len+x]<<8) + buf[len+len+x]; | |
125 | } | |
126 | ||
127 | buf += maplength; | |
128 | ||
129 | if (maplength && depth < 8) { | |
130 | ptr = ptr2 = av_malloc((w + 15) * h); | |
131 | if (!ptr) | |
132 | return AVERROR(ENOMEM); | |
133 | stride = (w + 15 >> 3) * depth; | |
134 | } else { | |
135 | ptr = p->data[0]; | |
136 | stride = p->linesize[0]; | |
137 | } | |
138 | ||
139 | /* scanlines are aligned on 16 bit boundaries */ | |
140 | len = (depth * w + 7) >> 3; | |
141 | alen = len + (len & 1); | |
142 | ||
143 | if (type == RT_BYTE_ENCODED) { | |
144 | int value, run; | |
145 | uint8_t *end = ptr + h * stride; | |
146 | ||
147 | x = 0; | |
148 | while (ptr != end && buf < buf_end) { | |
149 | run = 1; | |
150 | if (buf_end - buf < 1) | |
151 | return AVERROR_INVALIDDATA; | |
152 | ||
153 | if ((value = *buf++) == RLE_TRIGGER) { | |
154 | run = *buf++ + 1; | |
155 | if (run != 1) | |
156 | value = *buf++; | |
157 | } | |
158 | while (run--) { | |
159 | if (x < len) | |
160 | ptr[x] = value; | |
161 | if (++x >= alen) { | |
162 | x = 0; | |
163 | ptr += stride; | |
164 | if (ptr == end) | |
165 | break; | |
166 | } | |
167 | } | |
168 | } | |
169 | } else { | |
170 | for (y = 0; y < h; y++) { | |
171 | if (buf_end - buf < len) | |
172 | break; | |
173 | memcpy(ptr, buf, len); | |
174 | ptr += stride; | |
175 | buf += alen; | |
176 | } | |
177 | } | |
178 | if (avctx->pix_fmt == AV_PIX_FMT_PAL8 && depth < 8) { | |
179 | uint8_t *ptr_free = ptr2; | |
180 | ptr = p->data[0]; | |
181 | for (y=0; y<h; y++) { | |
182 | for (x = 0; x < (w + 7 >> 3) * depth; x++) { | |
183 | if (depth == 1) { | |
184 | ptr[8*x] = ptr2[x] >> 7; | |
185 | ptr[8*x+1] = ptr2[x] >> 6 & 1; | |
186 | ptr[8*x+2] = ptr2[x] >> 5 & 1; | |
187 | ptr[8*x+3] = ptr2[x] >> 4 & 1; | |
188 | ptr[8*x+4] = ptr2[x] >> 3 & 1; | |
189 | ptr[8*x+5] = ptr2[x] >> 2 & 1; | |
190 | ptr[8*x+6] = ptr2[x] >> 1 & 1; | |
191 | ptr[8*x+7] = ptr2[x] & 1; | |
192 | } else { | |
193 | ptr[2*x] = ptr2[x] >> 4; | |
194 | ptr[2*x+1] = ptr2[x] & 0xF; | |
195 | } | |
196 | } | |
197 | ptr += p->linesize[0]; | |
198 | ptr2 += (w + 15 >> 3) * depth; | |
199 | } | |
200 | av_freep(&ptr_free); | |
201 | } | |
202 | ||
203 | *got_frame = 1; | |
204 | ||
205 | return buf - bufstart; | |
206 | } | |
207 | ||
208 | AVCodec ff_sunrast_decoder = { | |
209 | .name = "sunrast", | |
210 | .long_name = NULL_IF_CONFIG_SMALL("Sun Rasterfile image"), | |
211 | .type = AVMEDIA_TYPE_VIDEO, | |
212 | .id = AV_CODEC_ID_SUNRAST, | |
213 | .decode = sunrast_decode_frame, | |
214 | .capabilities = CODEC_CAP_DR1, | |
215 | }; |