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
31static 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
129unsupported:
130    av_log(avctx, AV_LOG_ERROR, "unsupported d3d format (%08x)\n", d3d_format);
131    return AVERROR_PATCHWELCOME;
132}
133
134AVCodec 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};
142