Directory: | ../../../ffmpeg/ |
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File: | src/libavcodec/sunrast.c |
Date: | 2022-07-05 19:52:29 |
Exec | Total | Coverage | |
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Lines: | 73 | 125 | 58.4% |
Branches: | 53 | 90 | 58.9% |
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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 "codec_internal.h" | ||
27 | #include "internal.h" | ||
28 | #include "sunrast.h" | ||
29 | |||
30 | 28 | static int sunrast_decode_frame(AVCodecContext *avctx, AVFrame *p, | |
31 | int *got_frame, AVPacket *avpkt) | ||
32 | { | ||
33 | 28 | const uint8_t *buf = avpkt->data; | |
34 | 28 | const uint8_t *buf_end = avpkt->data + avpkt->size; | |
35 | unsigned int w, h, depth, type, maptype, maplength, stride, x, y, len, alen; | ||
36 | 28 | uint8_t *ptr, *ptr2 = NULL; | |
37 | 28 | const uint8_t *bufstart = buf; | |
38 | int ret; | ||
39 | |||
40 |
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28 | if (avpkt->size < 32) |
41 | ✗ | return AVERROR_INVALIDDATA; | |
42 | |||
43 |
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28 | 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 | 28 | w = AV_RB32(buf + 4); | |
49 | 28 | h = AV_RB32(buf + 8); | |
50 | 28 | depth = AV_RB32(buf + 12); | |
51 | 28 | type = AV_RB32(buf + 20); | |
52 | 28 | maptype = AV_RB32(buf + 24); | |
53 | 28 | maplength = AV_RB32(buf + 28); | |
54 | 28 | buf += 32; | |
55 | |||
56 |
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28 | if (type == RT_EXPERIMENTAL) { |
57 | ✗ | avpriv_request_sample(avctx, "TIFF/IFF/EXPERIMENTAL (compression) type"); | |
58 | ✗ | return AVERROR_PATCHWELCOME; | |
59 | } | ||
60 |
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28 | if (type > RT_FORMAT_IFF) { |
61 | ✗ | av_log(avctx, AV_LOG_ERROR, "invalid (compression) type\n"); | |
62 | ✗ | return AVERROR_INVALIDDATA; | |
63 | } | ||
64 |
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28 | if (maptype == RMT_RAW) { |
65 | ✗ | avpriv_request_sample(avctx, "Unknown colormap type"); | |
66 | ✗ | return AVERROR_PATCHWELCOME; | |
67 | } | ||
68 |
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28 | if (maptype > RMT_RAW) { |
69 | ✗ | av_log(avctx, AV_LOG_ERROR, "invalid colormap type\n"); | |
70 | ✗ | return AVERROR_INVALIDDATA; | |
71 | } | ||
72 | |||
73 |
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28 | if (type == RT_FORMAT_TIFF || type == RT_FORMAT_IFF) { |
74 | ✗ | av_log(avctx, AV_LOG_ERROR, "unsupported (compression) type\n"); | |
75 | ✗ | return AVERROR_PATCHWELCOME; | |
76 | } | ||
77 | |||
78 |
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28 | switch (depth) { |
79 | 4 | case 1: | |
80 |
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4 | avctx->pix_fmt = maplength ? AV_PIX_FMT_PAL8 : AV_PIX_FMT_MONOWHITE; |
81 | 4 | break; | |
82 | ✗ | case 4: | |
83 | ✗ | avctx->pix_fmt = maplength ? AV_PIX_FMT_PAL8 : AV_PIX_FMT_NONE; | |
84 | ✗ | break; | |
85 | 6 | case 8: | |
86 |
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6 | avctx->pix_fmt = maplength ? AV_PIX_FMT_PAL8 : AV_PIX_FMT_GRAY8; |
87 | 6 | break; | |
88 | 18 | case 24: | |
89 |
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18 | avctx->pix_fmt = (type == RT_FORMAT_RGB) ? AV_PIX_FMT_RGB24 : AV_PIX_FMT_BGR24; |
90 | 18 | 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 | 28 | ret = ff_set_dimensions(avctx, w, h); | |
100 |
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28 | if (ret < 0) |
101 | ✗ | return ret; | |
102 | |||
103 | /* scanlines are aligned on 16 bit boundaries */ | ||
104 | 28 | len = (depth * w + 7) >> 3; | |
105 | 28 | alen = len + (len & 1); | |
106 | |||
107 |
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28 | if (buf_end - buf < maplength + (len * h) * 3 / 256) |
108 | ✗ | return AVERROR_INVALIDDATA; | |
109 | |||
110 |
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28 | if ((ret = ff_get_buffer(avctx, p, 0)) < 0) |
111 | ✗ | return ret; | |
112 | |||
113 | 28 | p->pict_type = AV_PICTURE_TYPE_I; | |
114 | |||
115 |
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28 | if (depth > 8 && maplength) { |
116 | ✗ | av_log(avctx, AV_LOG_WARNING, "useless colormap found or file is corrupted, trying to recover\n"); | |
117 | |||
118 |
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28 | } else if (maplength) { |
119 | 4 | unsigned int len = maplength / 3; | |
120 | |||
121 |
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4 | if (maplength % 3 || maplength > 768) { |
122 | ✗ | av_log(avctx, AV_LOG_WARNING, "invalid colormap length\n"); | |
123 | ✗ | return AVERROR_INVALIDDATA; | |
124 | } | ||
125 | |||
126 | 4 | ptr = p->data[1]; | |
127 |
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1028 | for (x = 0; x < len; x++, ptr += 4) |
128 | 1024 | *(uint32_t *)ptr = (0xFFU<<24) + (buf[x]<<16) + (buf[len+x]<<8) + buf[len+len+x]; | |
129 | } | ||
130 | |||
131 | 28 | buf += maplength; | |
132 | |||
133 |
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28 | if (maplength && depth < 8) { |
134 | ✗ | ptr = ptr2 = av_malloc_array((w + 15), h); | |
135 | ✗ | if (!ptr) | |
136 | ✗ | return AVERROR(ENOMEM); | |
137 | ✗ | stride = (w + 15 >> 3) * depth; | |
138 | } else { | ||
139 | 28 | ptr = p->data[0]; | |
140 | 28 | stride = p->linesize[0]; | |
141 | } | ||
142 | |||
143 |
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28 | if (type == RT_BYTE_ENCODED) { |
144 | int value, run; | ||
145 | 20 | uint8_t *end = ptr + h * stride; | |
146 | |||
147 | 20 | x = 0; | |
148 |
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6339770 | while (ptr != end && buf < buf_end) { |
149 | 6339750 | run = 1; | |
150 |
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6339750 | if (buf_end - buf < 1) |
151 | ✗ | return AVERROR_INVALIDDATA; | |
152 | |||
153 |
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6339750 | if ((value = *buf++) == RLE_TRIGGER) { |
154 | 37867 | run = *buf++ + 1; | |
155 |
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37867 | if (run != 1) |
156 | 27727 | value = *buf++; | |
157 | } | ||
158 |
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12760210 | while (run--) { |
159 |
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6420480 | if (x < len) |
160 | 6420480 | ptr[x] = value; | |
161 |
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6420480 | if (++x >= alen) { |
162 | 7104 | x = 0; | |
163 | 7104 | ptr += stride; | |
164 |
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7104 | if (ptr == end) |
165 | 20 | break; | |
166 | } | ||
167 | } | ||
168 | } | ||
169 | } else { | ||
170 |
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4616 | for (y = 0; y < h; y++) { |
171 |
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4608 | if (buf_end - buf < alen) |
172 | ✗ | break; | |
173 | 4608 | memcpy(ptr, buf, len); | |
174 | 4608 | ptr += stride; | |
175 | 4608 | buf += alen; | |
176 | } | ||
177 | } | ||
178 |
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28 | 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 | 28 | *got_frame = 1; | |
204 | |||
205 | 28 | return buf - bufstart; | |
206 | } | ||
207 | |||
208 | const FFCodec ff_sunrast_decoder = { | ||
209 | .p.name = "sunrast", | ||
210 | .p.long_name = NULL_IF_CONFIG_SMALL("Sun Rasterfile image"), | ||
211 | .p.type = AVMEDIA_TYPE_VIDEO, | ||
212 | .p.id = AV_CODEC_ID_SUNRAST, | ||
213 | .p.capabilities = AV_CODEC_CAP_DR1, | ||
214 | FF_CODEC_DECODE_CB(sunrast_decode_frame), | ||
215 | }; | ||
216 |