Imported Debian version 2.5.3~trusty1
[deb_ffmpeg.git] / ffmpeg / libavcodec / txd.c
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 };