txd: Use the TextureDSP module for decoding
[libav.git] / 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 Libav.
8 *
9 * Libav 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 * Libav 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 Libav; 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 "avcodec.h"
27 #include "bytestream.h"
28 #include "internal.h"
29 #include "texturedsp.h"
30
31 #define TXD_DXT1 0x31545844
32 #define TXD_DXT3 0x33545844
33
34 static int txd_decode_frame(AVCodecContext *avctx, void *data, int *got_frame,
35 AVPacket *avpkt) {
36 GetByteContext gb;
37 TextureDSPContext dxtc;
38 AVFrame * const p = data;
39 unsigned int version, w, h, d3d_format, depth, stride, flags;
40 unsigned int y, v;
41 uint8_t *ptr;
42 uint32_t *pal;
43 int i, j;
44 int ret;
45
46 ff_texturedsp_init(&dxtc);
47
48 bytestream2_init(&gb, avpkt->data, avpkt->size);
49 version = bytestream2_get_le32(&gb);
50 bytestream2_skip(&gb, 72);
51 d3d_format = bytestream2_get_le32(&gb);
52 w = bytestream2_get_le16(&gb);
53 h = bytestream2_get_le16(&gb);
54 depth = bytestream2_get_byte(&gb);
55 bytestream2_skip(&gb, 2);
56 flags = bytestream2_get_byte(&gb);
57
58 if (version < 8 || version > 9) {
59 av_log(avctx, AV_LOG_ERROR, "texture data version %i is unsupported\n",
60 version);
61 return AVERROR_PATCHWELCOME;
62 }
63
64 if (depth == 8) {
65 avctx->pix_fmt = AV_PIX_FMT_PAL8;
66 } else if (depth == 16 || depth == 32) {
67 avctx->pix_fmt = AV_PIX_FMT_RGBA;
68 } else {
69 av_log(avctx, AV_LOG_ERROR, "depth of %i is unsupported\n", depth);
70 return AVERROR_PATCHWELCOME;
71 }
72
73 if ((ret = ff_set_dimensions(avctx, w, h)) < 0)
74 return ret;
75
76 avctx->coded_width = FFALIGN(w, 4);
77 avctx->coded_height = FFALIGN(h, 4);
78
79 if ((ret = ff_get_buffer(avctx, p, 0)) < 0) {
80 av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
81 return ret;
82 }
83
84 p->pict_type = AV_PICTURE_TYPE_I;
85
86 ptr = p->data[0];
87 stride = p->linesize[0];
88
89 if (depth == 8) {
90 pal = (uint32_t *) p->data[1];
91 for (y = 0; y < 256; y++) {
92 v = bytestream2_get_be32(&gb);
93 pal[y] = (v >> 8) + (v << 24);
94 }
95 bytestream2_skip(&gb, 4);
96 for (y=0; y<h; y++) {
97 bytestream2_get_buffer(&gb, ptr, w);
98 ptr += stride;
99 }
100 } else if (depth == 16) {
101 bytestream2_skip(&gb, 4);
102 switch (d3d_format) {
103 case 0:
104 if (!(flags & 1))
105 goto unsupported;
106 case TXD_DXT1:
107 for (j = 0; j < avctx->height; j += 4) {
108 for (i = 0; i < avctx->width; i += 4) {
109 uint8_t *p = ptr + i * 4 + j * stride;
110 int step = dxtc.dxt1_block(p, stride, gb.buffer);
111 bytestream2_skip(&gb, step);
112 }
113 }
114 break;
115 case TXD_DXT3:
116 for (j = 0; j < avctx->height; j += 4) {
117 for (i = 0; i < avctx->width; i += 4) {
118 uint8_t *p = ptr + i * 4 + j * stride;
119 int step = dxtc.dxt3_block(p, stride, gb.buffer);
120 bytestream2_skip(&gb, step);
121 }
122 }
123 break;
124 default:
125 goto unsupported;
126 }
127 } else if (depth == 32) {
128 switch (d3d_format) {
129 case 0x15:
130 case 0x16:
131 for (y=0; y<h; y++) {
132 bytestream2_get_buffer(&gb, ptr, w * 4);
133 ptr += stride;
134 }
135 break;
136 default:
137 goto unsupported;
138 }
139 }
140
141 *got_frame = 1;
142
143 return avpkt->size;
144
145 unsupported:
146 av_log(avctx, AV_LOG_ERROR, "unsupported d3d format (%08x)\n", d3d_format);
147 return AVERROR_PATCHWELCOME;
148 }
149
150 AVCodec ff_txd_decoder = {
151 .name = "txd",
152 .long_name = NULL_IF_CONFIG_SMALL("Renderware TXD (TeXture Dictionary) image"),
153 .type = AVMEDIA_TYPE_VIDEO,
154 .id = AV_CODEC_ID_TXD,
155 .decode = txd_decode_frame,
156 .capabilities = CODEC_CAP_DR1,
157 };