Statistics
| Branch: | Revision:

ffmpeg / libavcodec / txd.c @ 72415b2a

History | View | Annotate | Download (4.63 KB)

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 "avcodec.h"
26
#include "s3tc.h"
27

    
28
typedef struct TXDContext {
29
    AVFrame picture;
30
} TXDContext;
31

    
32
static av_cold int txd_init(AVCodecContext *avctx) {
33
    TXDContext *s = avctx->priv_data;
34

    
35
    avcodec_get_frame_defaults(&s->picture);
36
    avctx->coded_frame = &s->picture;
37

    
38
    return 0;
39
}
40

    
41
static int txd_decode_frame(AVCodecContext *avctx, void *data, int *data_size,
42
                            AVPacket *avpkt) {
43
    const uint8_t *buf = avpkt->data;
44
    TXDContext * const s = avctx->priv_data;
45
    AVFrame *picture = data;
46
    AVFrame * const p = &s->picture;
47
    unsigned int version, w, h, d3d_format, depth, stride, mipmap_count, flags;
48
    unsigned int y, v;
49
    uint8_t *ptr;
50
    const uint8_t *cur = buf;
51
    const uint32_t *palette = (const uint32_t *)(cur + 88);
52
    uint32_t *pal;
53

    
54
    version         = AV_RL32(cur);
55
    d3d_format      = AV_RL32(cur+76);
56
    w               = AV_RL16(cur+80);
57
    h               = AV_RL16(cur+82);
58
    depth           = AV_RL8 (cur+84);
59
    mipmap_count    = AV_RL8 (cur+85);
60
    flags           = AV_RL8 (cur+87);
61
    cur            += 92;
62

    
63
    if (version < 8 || version > 9) {
64
        av_log(avctx, AV_LOG_ERROR, "texture data version %i is unsupported\n",
65
                                                                    version);
66
        return -1;
67
    }
68

    
69
    if (depth == 8) {
70
        avctx->pix_fmt = PIX_FMT_PAL8;
71
        cur += 1024;
72
    } else if (depth == 16 || depth == 32)
73
        avctx->pix_fmt = PIX_FMT_RGB32;
74
    else {
75
        av_log(avctx, AV_LOG_ERROR, "depth of %i is unsupported\n", depth);
76
        return -1;
77
    }
78

    
79
    if (p->data[0])
80
        avctx->release_buffer(avctx, p);
81

    
82
    if (avcodec_check_dimensions(avctx, w, h))
83
        return -1;
84
    if (w != avctx->width || h != avctx->height)
85
        avcodec_set_dimensions(avctx, w, h);
86
    if (avctx->get_buffer(avctx, p) < 0) {
87
        av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
88
        return -1;
89
    }
90

    
91
    p->pict_type = FF_I_TYPE;
92

    
93
    ptr    = p->data[0];
94
    stride = p->linesize[0];
95

    
96
    if (depth == 8) {
97
        pal = (uint32_t *) p->data[1];
98
        for (y=0; y<256; y++) {
99
            v = AV_RB32(palette+y);
100
            pal[y] = (v>>8) + (v<<24);
101
        }
102
        for (y=0; y<h; y++) {
103
            memcpy(ptr, cur, w);
104
            ptr += stride;
105
            cur += w;
106
        }
107
    } else if (depth == 16) {
108
        switch (d3d_format) {
109
        case 0:
110
            if (!flags&1) goto unsupported;
111
        case FF_S3TC_DXT1:
112
            ff_decode_dxt1(cur, ptr, w, h, stride);
113
            break;
114
        case FF_S3TC_DXT3:
115
            ff_decode_dxt3(cur, ptr, w, h, stride);
116
            break;
117
        default:
118
            goto unsupported;
119
        }
120
    } else if (depth == 32) {
121
        switch (d3d_format) {
122
        case 0x15:
123
        case 0x16:
124
            for (y=0; y<h; y++) {
125
                memcpy(ptr, cur, w*4);
126
                ptr += stride;
127
                cur += w*4;
128
            }
129
            break;
130
        default:
131
            goto unsupported;
132
        }
133
    }
134

    
135
    for (; mipmap_count > 1; mipmap_count--)
136
        cur += AV_RL32(cur) + 4;
137

    
138
    *picture   = s->picture;
139
    *data_size = sizeof(AVPicture);
140

    
141
    return cur - buf;
142

    
143
unsupported:
144
    av_log(avctx, AV_LOG_ERROR, "unsupported d3d format (%08x)\n", d3d_format);
145
    return -1;
146
}
147

    
148
static av_cold int txd_end(AVCodecContext *avctx) {
149
    TXDContext *s = avctx->priv_data;
150

    
151
    if (s->picture.data[0])
152
        avctx->release_buffer(avctx, &s->picture);
153

    
154
    return 0;
155
}
156

    
157
AVCodec txd_decoder = {
158
    "txd",
159
    AVMEDIA_TYPE_VIDEO,
160
    CODEC_ID_TXD,
161
    sizeof(TXDContext),
162
    txd_init,
163
    NULL,
164
    txd_end,
165
    txd_decode_frame,
166
    CODEC_CAP_DR1,
167
    NULL,
168
    .long_name = NULL_IF_CONFIG_SMALL("Renderware TXD (TeXture Dictionary) image"),
169
};