GCC Code Coverage Report
Directory: ../../../ffmpeg/ Exec Total Coverage
File: src/libavcodec/sunrast.c Lines: 74 126 58.7 %
Date: 2020-08-14 10:39:37 Branches: 53 90 58.9 %

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/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
28
static int sunrast_decode_frame(AVCodecContext *avctx, void *data,
30
                                int *got_frame, AVPacket *avpkt)
31
{
32
28
    const uint8_t *buf       = avpkt->data;
33
28
    const uint8_t *buf_end   = avpkt->data + avpkt->size;
34
28
    AVFrame * const p        = data;
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
28
    if (avpkt->size < 32)
41
        return AVERROR_INVALIDDATA;
42
43
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
28
    if (type == RT_EXPERIMENTAL) {
57
        avpriv_request_sample(avctx, "TIFF/IFF/EXPERIMENTAL (compression) type");
58
        return AVERROR_PATCHWELCOME;
59
    }
60
28
    if (type > RT_FORMAT_IFF) {
61
        av_log(avctx, AV_LOG_ERROR, "invalid (compression) type\n");
62
        return AVERROR_INVALIDDATA;
63
    }
64
28
    if (maptype == RMT_RAW) {
65
        avpriv_request_sample(avctx, "Unknown colormap type");
66
        return AVERROR_PATCHWELCOME;
67
    }
68
28
    if (maptype > RMT_RAW) {
69
        av_log(avctx, AV_LOG_ERROR, "invalid colormap type\n");
70
        return AVERROR_INVALIDDATA;
71
    }
72
73

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

28
    switch (depth) {
79
4
        case 1:
80
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
6
            avctx->pix_fmt = maplength ? AV_PIX_FMT_PAL8 : AV_PIX_FMT_GRAY8;
87
6
            break;
88
18
        case 24:
89
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
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
28
    if (buf_end - buf < maplength + (len * h) * 3 / 256)
108
        return AVERROR_INVALIDDATA;
109
110
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

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
28
    } else if (maplength) {
119
4
        unsigned int len = maplength / 3;
120
121

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
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

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
28
    if (type == RT_BYTE_ENCODED) {
144
        int value, run;
145
20
        uint8_t *end = ptr + h * stride;
146
147
20
        x = 0;
148

6339770
        while (ptr != end && buf < buf_end) {
149
6339750
            run = 1;
150
6339750
            if (buf_end - buf < 1)
151
                return AVERROR_INVALIDDATA;
152
153
6339750
            if ((value = *buf++) == RLE_TRIGGER) {
154
37867
                run = *buf++ + 1;
155
37867
                if (run != 1)
156
27727
                    value = *buf++;
157
            }
158
12760210
            while (run--) {
159
6420480
                if (x < len)
160
6420480
                    ptr[x] = value;
161
6420480
                if (++x >= alen) {
162
7104
                    x = 0;
163
7104
                    ptr += stride;
164
7104
                    if (ptr == end)
165
20
                        break;
166
                }
167
            }
168
        }
169
    } else {
170
4616
        for (y = 0; y < h; y++) {
171
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

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
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   = AV_CODEC_CAP_DR1,
215
};