1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
|
/*
* QuickDraw (qdrw) codec
* Copyright (c) 2004 Konstantin Shishkov
*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
/**
* @file
* Apple QuickDraw codec.
*/
#include "libavutil/common.h"
#include "libavutil/intreadwrite.h"
#include "avcodec.h"
#include "internal.h"
static int decode_frame(AVCodecContext *avctx,
void *data, int *got_frame,
AVPacket *avpkt)
{
const uint8_t *buf = avpkt->data;
const uint8_t *buf_end = avpkt->data + avpkt->size;
int buf_size = avpkt->size;
AVFrame * const p = data;
uint8_t* outdata;
int colors;
int i, ret;
uint32_t *pal;
int r, g, b;
if ((ret = ff_get_buffer(avctx, p, 0)) < 0) {
av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
return ret;
}
p->pict_type = AV_PICTURE_TYPE_I;
p->key_frame = 1;
outdata = p->data[0];
if (buf_end - buf < 0x68 + 4)
return AVERROR_INVALIDDATA;
buf += 0x68; /* jump to palette */
colors = AV_RB32(buf);
buf += 4;
if (colors < 0 || colors > 256) {
av_log(avctx, AV_LOG_ERROR, "Error color count - %i(0x%X)\n", colors, colors);
return AVERROR_INVALIDDATA;
}
if (buf_end - buf < (colors + 1) * 8)
return AVERROR_INVALIDDATA;
pal = (uint32_t*)p->data[1];
for (i = 0; i <= colors; i++) {
unsigned int idx;
idx = AV_RB16(buf); /* color index */
buf += 2;
if (idx > 255) {
av_log(avctx, AV_LOG_ERROR, "Palette index out of range: %u\n", idx);
buf += 6;
continue;
}
r = *buf++;
buf++;
g = *buf++;
buf++;
b = *buf++;
buf++;
pal[idx] = 0xFFU << 24 | r << 16 | g << 8 | b;
}
p->palette_has_changed = 1;
if (buf_end - buf < 18)
return AVERROR_INVALIDDATA;
buf += 18; /* skip unneeded data */
for (i = 0; i < avctx->height; i++) {
int size, left, code, pix;
const uint8_t *next;
uint8_t *out;
int tsize = 0;
/* decode line */
out = outdata;
size = AV_RB16(buf); /* size of packed line */
buf += 2;
if (buf_end - buf < size)
return AVERROR_INVALIDDATA;
left = size;
next = buf + size;
while (left > 0) {
code = *buf++;
if (code & 0x80 ) { /* run */
pix = *buf++;
if ((out + (257 - code)) > (outdata + p->linesize[0]))
break;
memset(out, pix, 257 - code);
out += 257 - code;
tsize += 257 - code;
left -= 2;
} else { /* copy */
if ((out + code) > (outdata + p->linesize[0]))
break;
if (buf_end - buf < code + 1)
return AVERROR_INVALIDDATA;
memcpy(out, buf, code + 1);
out += code + 1;
buf += code + 1;
left -= 2 + code;
tsize += code + 1;
}
}
buf = next;
outdata += p->linesize[0];
}
*got_frame = 1;
return buf_size;
}
static av_cold int decode_init(AVCodecContext *avctx)
{
avctx->pix_fmt= AV_PIX_FMT_PAL8;
return 0;
}
AVCodec ff_qdraw_decoder = {
.name = "qdraw",
.type = AVMEDIA_TYPE_VIDEO,
.id = AV_CODEC_ID_QDRAW,
.init = decode_init,
.decode = decode_frame,
.capabilities = CODEC_CAP_DR1,
.long_name = NULL_IF_CONFIG_SMALL("Apple QuickDraw"),
};
|
