Go to most recent revision | Details | Last modification | View Log | RSS feed
Rev | Author | Line No. | Line |
---|---|---|---|
4349 | Serge | 1 | /* |
2 | * QuickDraw (qdrw) codec |
||
3 | * Copyright (c) 2004 Konstantin Shishkov |
||
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 | /** |
||
23 | * @file |
||
24 | * Apple QuickDraw codec. |
||
25 | */ |
||
26 | |||
27 | #include "libavutil/common.h" |
||
28 | #include "libavutil/intreadwrite.h" |
||
29 | #include "avcodec.h" |
||
30 | #include "internal.h" |
||
31 | |||
32 | static int decode_frame(AVCodecContext *avctx, |
||
33 | void *data, int *got_frame, |
||
34 | AVPacket *avpkt) |
||
35 | { |
||
36 | const uint8_t *buf = avpkt->data; |
||
37 | const uint8_t *buf_end = avpkt->data + avpkt->size; |
||
38 | int buf_size = avpkt->size; |
||
39 | AVFrame * const p = data; |
||
40 | uint8_t* outdata; |
||
41 | int colors; |
||
42 | int i, ret; |
||
43 | uint32_t *pal; |
||
44 | int r, g, b; |
||
45 | |||
46 | if ((ret = ff_get_buffer(avctx, p, 0)) < 0) |
||
47 | return ret; |
||
48 | p->pict_type = AV_PICTURE_TYPE_I; |
||
49 | p->key_frame = 1; |
||
50 | |||
51 | outdata = p->data[0]; |
||
52 | |||
53 | if (buf_end - buf < 0x68 + 4) |
||
54 | return AVERROR_INVALIDDATA; |
||
55 | buf += 0x68; /* jump to palette */ |
||
56 | colors = AV_RB32(buf); |
||
57 | buf += 4; |
||
58 | |||
59 | if (colors < 0 || colors > 256) { |
||
60 | av_log(avctx, AV_LOG_ERROR, "Error color count - %i(0x%X)\n", colors, colors); |
||
61 | return AVERROR_INVALIDDATA; |
||
62 | } |
||
63 | if (buf_end - buf < (colors + 1) * 8) |
||
64 | return AVERROR_INVALIDDATA; |
||
65 | |||
66 | pal = (uint32_t*)p->data[1]; |
||
67 | for (i = 0; i <= colors; i++) { |
||
68 | unsigned int idx; |
||
69 | idx = AV_RB16(buf); /* color index */ |
||
70 | buf += 2; |
||
71 | |||
72 | if (idx > 255) { |
||
73 | av_log(avctx, AV_LOG_ERROR, "Palette index out of range: %u\n", idx); |
||
74 | buf += 6; |
||
75 | continue; |
||
76 | } |
||
77 | r = *buf++; |
||
78 | buf++; |
||
79 | g = *buf++; |
||
80 | buf++; |
||
81 | b = *buf++; |
||
82 | buf++; |
||
83 | pal[idx] = 0xFFU << 24 | r << 16 | g << 8 | b; |
||
84 | } |
||
85 | p->palette_has_changed = 1; |
||
86 | |||
87 | if (buf_end - buf < 18) |
||
88 | return AVERROR_INVALIDDATA; |
||
89 | buf += 18; /* skip unneeded data */ |
||
90 | for (i = 0; i < avctx->height; i++) { |
||
91 | int size, left, code, pix; |
||
92 | const uint8_t *next; |
||
93 | uint8_t *out; |
||
94 | int tsize = 0; |
||
95 | |||
96 | /* decode line */ |
||
97 | out = outdata; |
||
98 | size = AV_RB16(buf); /* size of packed line */ |
||
99 | buf += 2; |
||
100 | if (buf_end - buf < size) |
||
101 | return AVERROR_INVALIDDATA; |
||
102 | |||
103 | left = size; |
||
104 | next = buf + size; |
||
105 | while (left > 0) { |
||
106 | code = *buf++; |
||
107 | if (code & 0x80 ) { /* run */ |
||
108 | pix = *buf++; |
||
109 | if ((out + (257 - code)) > (outdata + p->linesize[0])) |
||
110 | break; |
||
111 | memset(out, pix, 257 - code); |
||
112 | out += 257 - code; |
||
113 | tsize += 257 - code; |
||
114 | left -= 2; |
||
115 | } else { /* copy */ |
||
116 | if ((out + code) > (outdata + p->linesize[0])) |
||
117 | break; |
||
118 | if (buf_end - buf < code + 1) |
||
119 | return AVERROR_INVALIDDATA; |
||
120 | memcpy(out, buf, code + 1); |
||
121 | out += code + 1; |
||
122 | buf += code + 1; |
||
123 | left -= 2 + code; |
||
124 | tsize += code + 1; |
||
125 | } |
||
126 | } |
||
127 | buf = next; |
||
128 | outdata += p->linesize[0]; |
||
129 | } |
||
130 | |||
131 | *got_frame = 1; |
||
132 | |||
133 | return buf_size; |
||
134 | } |
||
135 | |||
136 | static av_cold int decode_init(AVCodecContext *avctx) |
||
137 | { |
||
138 | avctx->pix_fmt= AV_PIX_FMT_PAL8; |
||
139 | |||
140 | return 0; |
||
141 | } |
||
142 | |||
143 | AVCodec ff_qdraw_decoder = { |
||
144 | .name = "qdraw", |
||
145 | .long_name = NULL_IF_CONFIG_SMALL("Apple QuickDraw"), |
||
146 | .type = AVMEDIA_TYPE_VIDEO, |
||
147 | .id = AV_CODEC_ID_QDRAW, |
||
148 | .init = decode_init, |
||
149 | .decode = decode_frame, |
||
150 | .capabilities = CODEC_CAP_DR1, |
||
151 | };>>>>><>><>><>=>>>>> |