FFmpeg coverage

Directory: ../../../ffmpeg/
File: src/libavcodec/txd.c
Date: 2026-10-14 03:02:30
Exec Total Coverage
Lines: 61 94 64.9%
Functions: 1 1 100.0%
Branches: 31 59 52.5%
Line Branch Exec Source
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 "bytestream.h"
25 #include "avcodec.h"
26 #include "codec_internal.h"
27 #include "decode.h"
28 #include "libavutil/attributes.h"
29 #include "texturedsp.h"
30
31 #define TXD_DXT1 0x31545844
32 #define TXD_DXT3 0x33545844
33
34 16 static int txd_decode_frame(AVCodecContext *avctx, AVFrame *p,
35 int *got_frame, AVPacket *avpkt)
36 {
37 GetByteContext gb;
38 TextureDSPContext dxtc;
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
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 16 if (avpkt->size < 88)
47 ✗ return AVERROR_INVALIDDATA;
48
49 16 ff_texturedsp_init(&dxtc);
50
51 16 bytestream2_init(&gb, avpkt->data, avpkt->size);
52 16 version = bytestream2_get_le32(&gb);
53 16 bytestream2_skip(&gb, 72);
54 16 d3d_format = bytestream2_get_le32(&gb);
55 16 w = bytestream2_get_le16(&gb);
56 16 h = bytestream2_get_le16(&gb);
57 16 depth = bytestream2_get_byte(&gb);
58 16 bytestream2_skip(&gb, 2);
59 16 flags = bytestream2_get_byte(&gb);
60
61
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 16 if (version < 8 || version > 9) {
62 ✗ avpriv_report_missing_feature(avctx, "Texture data version %u", version);
63 ✗ return AVERROR_PATCHWELCOME;
64 }
65
66
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 16 if (depth == 8) {
67 2 avctx->pix_fmt = AV_PIX_FMT_PAL8;
68
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 2 if (bytestream2_get_bytes_left(&gb) < w * h + 4 * 256)
69 ✗ return AVERROR_INVALIDDATA;
70
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 14 } else if (depth == 16) {
71 14 avctx->pix_fmt = AV_PIX_FMT_RGBA;
72
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 14 switch (d3d_format) {
73 12 case 0:
74
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 12 if (!(flags & 1))
75 ✗ goto unsupported;
76 av_fallthrough;
77 case TXD_DXT1:
78
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 12 if (bytestream2_get_bytes_left(&gb) < AV_CEIL_RSHIFT(w, 2) * AV_CEIL_RSHIFT(h, 2) * 8 + 4)
79 ✗ return AVERROR_INVALIDDATA;
80 12 break;
81 2 case TXD_DXT3:
82
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 2 if (bytestream2_get_bytes_left(&gb) < AV_CEIL_RSHIFT(w, 2) * AV_CEIL_RSHIFT(h, 2) * 16 + 4)
83 ✗ return AVERROR_INVALIDDATA;
84 2 break;
85 ✗ default:
86 ✗ goto unsupported;
87 }
88 ✗ } else if (depth == 32) {
89 ✗ avctx->pix_fmt = AV_PIX_FMT_RGBA;
90 ✗ if (d3d_format != 0x15 && d3d_format != 0x16)
91 ✗ goto unsupported;
92 ✗ if (bytestream2_get_bytes_left(&gb) < h * w * 4)
93 ✗ return AVERROR_INVALIDDATA;
94 } else {
95 ✗ avpriv_report_missing_feature(avctx, "Color depth of %u", depth);
96 ✗ return AVERROR_PATCHWELCOME;
97 }
98
99
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 16 if ((ret = ff_set_dimensions(avctx, w, h)) < 0)
100 ✗ return ret;
101
102 16 avctx->coded_width = FFALIGN(w, 4);
103 16 avctx->coded_height = FFALIGN(h, 4);
104
105
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 16 if ((ret = ff_get_buffer(avctx, p, 0)) < 0)
106 ✗ return ret;
107
108 16 p->pict_type = AV_PICTURE_TYPE_I;
109
110 16 ptr = p->data[0];
111 16 stride = p->linesize[0];
112
113
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 16 if (depth == 8) {
114 2 pal = (uint32_t *) p->data[1];
115
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 514 for (y = 0; y < 256; y++) {
116 512 v = bytestream2_get_be32(&gb);
117 512 pal[y] = (v >> 8) + (v << 24);
118 }
119 2 bytestream2_skip(&gb, 4);
120
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 1026 for (y=0; y<h; y++) {
121 1024 bytestream2_get_buffer(&gb, ptr, w);
122 1024 ptr += stride;
123 }
124
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 14 } else if (depth == 16) {
125 14 bytestream2_skip(&gb, 4);
126
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 14 switch (d3d_format) {
127 12 case 0:
128 case TXD_DXT1:
129
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 204 for (j = 0; j < avctx->height; j += 4) {
130
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 3264 for (i = 0; i < avctx->width; i += 4) {
131 3072 uint8_t *p = ptr + i * 4 + j * stride;
132 3072 int step = dxtc.dxt1_block(p, stride, gb.buffer);
133 3072 bytestream2_skip(&gb, step);
134 }
135 }
136 12 break;
137 2 case TXD_DXT3:
138
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 128 for (j = 0; j < avctx->height; j += 4) {
139
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 12348 for (i = 0; i < avctx->width; i += 4) {
140 12222 uint8_t *p = ptr + i * 4 + j * stride;
141 12222 int step = dxtc.dxt3_block(p, stride, gb.buffer);
142 12222 bytestream2_skip(&gb, step);
143 }
144 }
145 2 break;
146 ✗ default:
147 ✗ goto unsupported;
148 }
149 ✗ } else if (depth == 32) {
150 ✗ switch (d3d_format) {
151 ✗ case 0x15:
152 case 0x16:
153 ✗ for (y=0; y<h; y++) {
154 ✗ bytestream2_get_buffer(&gb, ptr, w * 4);
155 ✗ ptr += stride;
156 }
157 ✗ break;
158 ✗ default:
159 ✗ goto unsupported;
160 }
161 }
162
163 16 *got_frame = 1;
164
165 16 return avpkt->size;
166
167 ✗ unsupported:
168 ✗ avpriv_report_missing_feature(avctx, "d3d format (%08x)", d3d_format);
169 ✗ return AVERROR_PATCHWELCOME;
170 }
171
172 const FFCodec ff_txd_decoder = {
173 .p.name = "txd",
174 CODEC_LONG_NAME("Renderware TXD (TeXture Dictionary) image"),
175 .p.type = AVMEDIA_TYPE_VIDEO,
176 .p.id = AV_CODEC_ID_TXD,
177 .p.capabilities = AV_CODEC_CAP_DR1,
178 FF_CODEC_DECODE_CB(txd_decode_frame),
179 };
180