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1 | /* |
2 | * Renderware TeXture Dictionary (.txd) image decoder | |
3 | * Copyright (c) 2007 Ivo van Poorten | |
4 | * | |
5 | * See also: http://wiki.multimedia.cx/index.php?title=TXD | |
6 | * | |
7 | * This file is part of FFmpeg. | |
8 | * | |
9 | * FFmpeg is free software; you can redistribute it and/or | |
10 | * modify it under the terms of the GNU Lesser General Public | |
11 | * License as published by the Free Software Foundation; either | |
12 | * version 2.1 of the License, or (at your option) any later version. | |
13 | * | |
14 | * FFmpeg is distributed in the hope that it will be useful, | |
15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
17 | * Lesser General Public License for more details. | |
18 | * | |
19 | * You should have received a copy of the GNU Lesser General Public | |
20 | * License along with FFmpeg; if not, write to the Free Software | |
21 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | |
22 | */ | |
23 | ||
24 | #include "libavutil/intreadwrite.h" | |
25 | #include "libavutil/imgutils.h" | |
26 | #include "bytestream.h" | |
27 | #include "avcodec.h" | |
28 | #include "internal.h" | |
29 | #include "s3tc.h" | |
30 | ||
31 | static int txd_decode_frame(AVCodecContext *avctx, void *data, int *got_frame, | |
32 | AVPacket *avpkt) { | |
33 | GetByteContext gb; | |
34 | AVFrame * const p = data; | |
35 | unsigned int version, w, h, d3d_format, depth, stride, flags; | |
36 | unsigned int y, v; | |
37 | uint8_t *ptr; | |
38 | uint32_t *pal; | |
39 | int ret; | |
40 | ||
41 | bytestream2_init(&gb, avpkt->data, avpkt->size); | |
42 | version = bytestream2_get_le32(&gb); | |
43 | bytestream2_skip(&gb, 72); | |
44 | d3d_format = bytestream2_get_le32(&gb); | |
45 | w = bytestream2_get_le16(&gb); | |
46 | h = bytestream2_get_le16(&gb); | |
47 | depth = bytestream2_get_byte(&gb); | |
48 | bytestream2_skip(&gb, 2); | |
49 | flags = bytestream2_get_byte(&gb); | |
50 | ||
51 | if (version < 8 || version > 9) { | |
52 | av_log(avctx, AV_LOG_ERROR, "texture data version %i is unsupported\n", | |
53 | version); | |
54 | return AVERROR_PATCHWELCOME; | |
55 | } | |
56 | ||
57 | if (depth == 8) { | |
58 | avctx->pix_fmt = AV_PIX_FMT_PAL8; | |
59 | } else if (depth == 16 || depth == 32) { | |
60 | avctx->pix_fmt = AV_PIX_FMT_RGB32; | |
61 | } else { | |
62 | av_log(avctx, AV_LOG_ERROR, "depth of %i is unsupported\n", depth); | |
63 | return AVERROR_PATCHWELCOME; | |
64 | } | |
65 | ||
66 | if ((ret = ff_set_dimensions(avctx, w, h)) < 0) | |
67 | return ret; | |
68 | ||
69 | if ((ret = ff_get_buffer(avctx, p, 0)) < 0) | |
70 | return ret; | |
71 | ||
72 | p->pict_type = AV_PICTURE_TYPE_I; | |
73 | ||
74 | ptr = p->data[0]; | |
75 | stride = p->linesize[0]; | |
76 | ||
77 | if (depth == 8) { | |
78 | pal = (uint32_t *) p->data[1]; | |
79 | for (y = 0; y < 256; y++) { | |
80 | v = bytestream2_get_be32(&gb); | |
81 | pal[y] = (v >> 8) + (v << 24); | |
82 | } | |
83 | if (bytestream2_get_bytes_left(&gb) < w * h) | |
84 | return AVERROR_INVALIDDATA; | |
85 | bytestream2_skip(&gb, 4); | |
86 | for (y=0; y<h; y++) { | |
87 | bytestream2_get_buffer(&gb, ptr, w); | |
88 | ptr += stride; | |
89 | } | |
90 | } else if (depth == 16) { | |
91 | bytestream2_skip(&gb, 4); | |
92 | switch (d3d_format) { | |
93 | case 0: | |
94 | if (!(flags & 1)) | |
95 | goto unsupported; | |
96 | case FF_S3TC_DXT1: | |
97 | if (bytestream2_get_bytes_left(&gb) < (w/4) * (h/4) * 8) | |
98 | return AVERROR_INVALIDDATA; | |
99 | ff_decode_dxt1(&gb, ptr, w, h, stride); | |
100 | break; | |
101 | case FF_S3TC_DXT3: | |
102 | if (bytestream2_get_bytes_left(&gb) < (w/4) * (h/4) * 16) | |
103 | return AVERROR_INVALIDDATA; | |
104 | ff_decode_dxt3(&gb, ptr, w, h, stride); | |
105 | break; | |
106 | default: | |
107 | goto unsupported; | |
108 | } | |
109 | } else if (depth == 32) { | |
110 | switch (d3d_format) { | |
111 | case 0x15: | |
112 | case 0x16: | |
113 | if (bytestream2_get_bytes_left(&gb) < h * w * 4) | |
114 | return AVERROR_INVALIDDATA; | |
115 | for (y=0; y<h; y++) { | |
116 | bytestream2_get_buffer(&gb, ptr, w * 4); | |
117 | ptr += stride; | |
118 | } | |
119 | break; | |
120 | default: | |
121 | goto unsupported; | |
122 | } | |
123 | } | |
124 | ||
125 | *got_frame = 1; | |
126 | ||
127 | return avpkt->size; | |
128 | ||
129 | unsupported: | |
130 | av_log(avctx, AV_LOG_ERROR, "unsupported d3d format (%08x)\n", d3d_format); | |
131 | return AVERROR_PATCHWELCOME; | |
132 | } | |
133 | ||
134 | AVCodec ff_txd_decoder = { | |
135 | .name = "txd", | |
136 | .long_name = NULL_IF_CONFIG_SMALL("Renderware TXD (TeXture Dictionary) image"), | |
137 | .type = AVMEDIA_TYPE_VIDEO, | |
138 | .id = AV_CODEC_ID_TXD, | |
139 | .decode = txd_decode_frame, | |
140 | .capabilities = CODEC_CAP_DR1, | |
141 | }; |