FFmpeg coverage

Directory: ../../../ffmpeg/
File: src/libavcodec/sunrast.c
Date: 2024-04-19 17:50:32
Exec Total Coverage
Lines: 76 130 58.5%
Functions: 1 1 100.0%
Branches: 55 94 58.5%
Line Branch Exec Source
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/avassert.h"
23 #include "libavutil/common.h"
24 #include "libavutil/intreadwrite.h"
25 #include "libavutil/mem.h"
26 #include "avcodec.h"
27 #include "codec_internal.h"
28 #include "decode.h"
29 #include "sunrast.h"
30
31 28 static int sunrast_decode_frame(AVCodecContext *avctx, AVFrame *p,
32 int *got_frame, AVPacket *avpkt)
33 {
34 28 const uint8_t *buf = avpkt->data;
35 28 const uint8_t *buf_end = avpkt->data + avpkt->size;
36 unsigned int w, h, depth, type, maptype, maplength, x, y, len, alen;
37 ptrdiff_t stride;
38 28 uint8_t *ptr, *ptr2 = NULL;
39 28 const uint8_t *bufstart = buf;
40 int ret;
41
42
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 28 if (avpkt->size < 32)
43 ✗ return AVERROR_INVALIDDATA;
44
45
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 28 if (AV_RB32(buf) != RAS_MAGIC) {
46 ✗ av_log(avctx, AV_LOG_ERROR, "this is not sunras encoded data\n");
47 ✗ return AVERROR_INVALIDDATA;
48 }
49
50 28 w = AV_RB32(buf + 4);
51 28 h = AV_RB32(buf + 8);
52 28 depth = AV_RB32(buf + 12);
53 28 type = AV_RB32(buf + 20);
54 28 maptype = AV_RB32(buf + 24);
55 28 maplength = AV_RB32(buf + 28);
56 28 buf += 32;
57
58
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 28 if (type == RT_EXPERIMENTAL) {
59 ✗ avpriv_request_sample(avctx, "TIFF/IFF/EXPERIMENTAL (compression) type");
60 ✗ return AVERROR_PATCHWELCOME;
61 }
62
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 28 if (type > RT_FORMAT_IFF) {
63 ✗ av_log(avctx, AV_LOG_ERROR, "invalid (compression) type\n");
64 ✗ return AVERROR_INVALIDDATA;
65 }
66
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 28 if (maptype == RMT_RAW) {
67 ✗ avpriv_request_sample(avctx, "Unknown colormap type");
68 ✗ return AVERROR_PATCHWELCOME;
69 }
70
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 28 if (maptype > RMT_RAW) {
71 ✗ av_log(avctx, AV_LOG_ERROR, "invalid colormap type\n");
72 ✗ return AVERROR_INVALIDDATA;
73 }
74
75
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 28 if (type == RT_FORMAT_TIFF || type == RT_FORMAT_IFF) {
76 ✗ av_log(avctx, AV_LOG_ERROR, "unsupported (compression) type\n");
77 ✗ return AVERROR_PATCHWELCOME;
78 }
79
80
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 28 if (maplength > 768) {
81 ✗ av_log(avctx, AV_LOG_WARNING, "invalid colormap length\n");
82 ✗ return AVERROR_INVALIDDATA;
83 }
84
85 // This also checks depth to be valid
86
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 28 switch (depth) {
87 4 case 1:
88
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 4 avctx->pix_fmt = maplength ? AV_PIX_FMT_PAL8 : AV_PIX_FMT_MONOWHITE;
89 4 break;
90 ✗ case 4:
91 ✗ avctx->pix_fmt = maplength ? AV_PIX_FMT_PAL8 : AV_PIX_FMT_NONE;
92 ✗ break;
93 6 case 8:
94
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 6 avctx->pix_fmt = maplength ? AV_PIX_FMT_PAL8 : AV_PIX_FMT_GRAY8;
95 6 break;
96 18 case 24:
97
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 18 avctx->pix_fmt = (type == RT_FORMAT_RGB) ? AV_PIX_FMT_RGB24 : AV_PIX_FMT_BGR24;
98 18 break;
99 ✗ case 32:
100 ✗ avctx->pix_fmt = (type == RT_FORMAT_RGB) ? AV_PIX_FMT_0RGB : AV_PIX_FMT_0BGR;
101 ✗ break;
102 ✗ default:
103 ✗ av_log(avctx, AV_LOG_ERROR, "invalid depth\n");
104 ✗ return AVERROR_INVALIDDATA;
105 }
106
107 // This checks w and h to be valid in the sense that bytes of a padded bitmap are addressable with 32bit int
108 28 ret = ff_set_dimensions(avctx, w, h);
109
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 28 if (ret < 0)
110 ✗ return ret;
111
112 // ensured by ff_set_dimensions()
113
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 28 av_assert0(w <= (INT32_MAX - 7) / depth);
114
115 /* scanlines are aligned on 16 bit boundaries */
116 28 len = (depth * w + 7) >> 3;
117 28 alen = len + (len & 1);
118
119 // ensured by ff_set_dimensions()
120
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 28 av_assert0(h <= INT32_MAX / (3 * len));
121
122 // maplength is limited to 768 and the right term is limited to INT32_MAX / 256 so the add needs no check
123
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 28 if (buf_end - buf < (uint64_t)maplength + (len * h) * 3 / 256)
124 ✗ return AVERROR_INVALIDDATA;
125
126
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 28 if ((ret = ff_get_buffer(avctx, p, 0)) < 0)
127 ✗ return ret;
128
129 28 p->pict_type = AV_PICTURE_TYPE_I;
130
131
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 28 if (depth > 8 && maplength) {
132 ✗ av_log(avctx, AV_LOG_WARNING, "useless colormap found or file is corrupted, trying to recover\n");
133
134
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 28 } else if (maplength) {
135 4 unsigned int len = maplength / 3;
136
137
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 4 if (maplength % 3) {
138 ✗ av_log(avctx, AV_LOG_WARNING, "invalid colormap length\n");
139 ✗ return AVERROR_INVALIDDATA;
140 }
141
142 4 ptr = p->data[1];
143
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 1028 for (x = 0; x < len; x++, ptr += 4)
144 1024 *(uint32_t *)ptr = (0xFFU<<24) + (buf[x]<<16) + (buf[len+x]<<8) + buf[len+len+x];
145 }
146
147 28 buf += maplength;
148
149
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 28 if (maplength && depth < 8) {
150 ✗ ptr = ptr2 = av_malloc_array((w + 15), h);
151 ✗ if (!ptr)
152 ✗ return AVERROR(ENOMEM);
153 ✗ stride = (w + 15 >> 3) * depth;
154 } else {
155 28 ptr = p->data[0];
156 28 stride = p->linesize[0];
157 }
158
159
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 28 if (type == RT_BYTE_ENCODED) {
160 int value, run;
161 20 uint8_t *end = ptr + (ptrdiff_t)h * stride;
162
163 20 x = 0;
164
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 6339770 while (ptr != end && buf < buf_end) {
165 6339750 run = 1;
166
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 6339750 if (buf_end - buf < 1)
167 ✗ return AVERROR_INVALIDDATA;
168
169
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 6339750 if ((value = *buf++) == RLE_TRIGGER) {
170 37867 run = *buf++ + 1;
171
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 37867 if (run != 1)
172 27727 value = *buf++;
173 }
174
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 12760210 while (run--) {
175
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 6420480 if (x < len)
176 6420480 ptr[x] = value;
177
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 6420480 if (++x >= alen) {
178 7104 x = 0;
179 7104 ptr += stride;
180
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 7104 if (ptr == end)
181 20 break;
182 }
183 }
184 }
185 } else {
186
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 4616 for (y = 0; y < h; y++) {
187
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 4608 if (buf_end - buf < alen)
188 ✗ break;
189 4608 memcpy(ptr, buf, len);
190 4608 ptr += stride;
191 4608 buf += alen;
192 }
193 }
194
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 28 if (avctx->pix_fmt == AV_PIX_FMT_PAL8 && depth < 8) {
195 ✗ uint8_t *ptr_free = ptr2;
196 ✗ ptr = p->data[0];
197 ✗ for (y=0; y<h; y++) {
198 ✗ for (x = 0; x < (w + 7 >> 3) * depth; x++) {
199 ✗ if (depth == 1) {
200 ✗ ptr[8*x] = ptr2[x] >> 7;
201 ✗ ptr[8*x+1] = ptr2[x] >> 6 & 1;
202 ✗ ptr[8*x+2] = ptr2[x] >> 5 & 1;
203 ✗ ptr[8*x+3] = ptr2[x] >> 4 & 1;
204 ✗ ptr[8*x+4] = ptr2[x] >> 3 & 1;
205 ✗ ptr[8*x+5] = ptr2[x] >> 2 & 1;
206 ✗ ptr[8*x+6] = ptr2[x] >> 1 & 1;
207 ✗ ptr[8*x+7] = ptr2[x] & 1;
208 } else {
209 ✗ ptr[2*x] = ptr2[x] >> 4;
210 ✗ ptr[2*x+1] = ptr2[x] & 0xF;
211 }
212 }
213 ✗ ptr += p->linesize[0];
214 ✗ ptr2 += (w + 15 >> 3) * depth;
215 }
216 ✗ av_freep(&ptr_free);
217 }
218
219 28 *got_frame = 1;
220
221 28 return buf - bufstart;
222 }
223
224 const FFCodec ff_sunrast_decoder = {
225 .p.name = "sunrast",
226 CODEC_LONG_NAME("Sun Rasterfile image"),
227 .p.type = AVMEDIA_TYPE_VIDEO,
228 .p.id = AV_CODEC_ID_SUNRAST,
229 .p.capabilities = AV_CODEC_CAP_DR1,
230 FF_CODEC_DECODE_CB(sunrast_decode_frame),
231 };
232