FFmpeg coverage

Directory: ../../../ffmpeg/
File: src/libavcodec/txd.c
Date: 2026-01-23 14:02:51
Exec Total Coverage
Lines: 60 89 67.4%
Functions: 1 1 100.0%
Branches: 31 55 56.4%
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 "texturedsp.h"
29
30 #define TXD_DXT1 0x31545844
31 #define TXD_DXT3 0x33545844
32
33 16 static int txd_decode_frame(AVCodecContext *avctx, AVFrame *p,
34 int *got_frame, AVPacket *avpkt)
35 {
36 GetByteContext gb;
37 TextureDSPContext dxtc;
38 unsigned int version, w, h, d3d_format, depth, stride, flags;
39 unsigned int y, v;
40 uint8_t *ptr;
41 uint32_t *pal;
42 int i, j;
43 int ret;
44
45
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 16 if (avpkt->size < 88)
46 ✗ return AVERROR_INVALIDDATA;
47
48 16 ff_texturedsp_init(&dxtc);
49
50 16 bytestream2_init(&gb, avpkt->data, avpkt->size);
51 16 version = bytestream2_get_le32(&gb);
52 16 bytestream2_skip(&gb, 72);
53 16 d3d_format = bytestream2_get_le32(&gb);
54 16 w = bytestream2_get_le16(&gb);
55 16 h = bytestream2_get_le16(&gb);
56 16 depth = bytestream2_get_byte(&gb);
57 16 bytestream2_skip(&gb, 2);
58 16 flags = bytestream2_get_byte(&gb);
59
60
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 16 if (version < 8 || version > 9) {
61 ✗ avpriv_report_missing_feature(avctx, "Texture data version %u", version);
62 ✗ return AVERROR_PATCHWELCOME;
63 }
64
65
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 16 if (depth == 8) {
66 2 avctx->pix_fmt = AV_PIX_FMT_PAL8;
67
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 2 if (bytestream2_get_bytes_left(&gb) < w * h + 4 * 256)
68 ✗ return AVERROR_INVALIDDATA;
69
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 14 } else if (depth == 16) {
70 14 avctx->pix_fmt = AV_PIX_FMT_RGBA;
71
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 14 switch (d3d_format) {
72 12 case 0:
73
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 12 if (!(flags & 1))
74 ✗ goto unsupported;
75 case TXD_DXT1:
76
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 12 if (bytestream2_get_bytes_left(&gb) < AV_CEIL_RSHIFT(w, 2) * AV_CEIL_RSHIFT(h, 2) * 8 + 4)
77 ✗ return AVERROR_INVALIDDATA;
78 12 break;
79 2 case TXD_DXT3:
80
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 2 if (bytestream2_get_bytes_left(&gb) < AV_CEIL_RSHIFT(w, 2) * AV_CEIL_RSHIFT(h, 2) * 16 + 4)
81 ✗ return AVERROR_INVALIDDATA;
82 }
83 ✗ } else if (depth == 32) {
84 ✗ avctx->pix_fmt = AV_PIX_FMT_RGBA;
85 ✗ if (bytestream2_get_bytes_left(&gb) < h * w * 4)
86 ✗ return AVERROR_INVALIDDATA;
87 } else {
88 ✗ avpriv_report_missing_feature(avctx, "Color depth of %u", depth);
89 ✗ return AVERROR_PATCHWELCOME;
90 }
91
92
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 16 if ((ret = ff_set_dimensions(avctx, w, h)) < 0)
93 ✗ return ret;
94
95 16 avctx->coded_width = FFALIGN(w, 4);
96 16 avctx->coded_height = FFALIGN(h, 4);
97
98
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 16 if ((ret = ff_get_buffer(avctx, p, 0)) < 0)
99 ✗ return ret;
100
101 16 p->pict_type = AV_PICTURE_TYPE_I;
102
103 16 ptr = p->data[0];
104 16 stride = p->linesize[0];
105
106
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 16 if (depth == 8) {
107 2 pal = (uint32_t *) p->data[1];
108
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 514 for (y = 0; y < 256; y++) {
109 512 v = bytestream2_get_be32(&gb);
110 512 pal[y] = (v >> 8) + (v << 24);
111 }
112 2 bytestream2_skip(&gb, 4);
113
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 1026 for (y=0; y<h; y++) {
114 1024 bytestream2_get_buffer(&gb, ptr, w);
115 1024 ptr += stride;
116 }
117
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 14 } else if (depth == 16) {
118 14 bytestream2_skip(&gb, 4);
119
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 14 switch (d3d_format) {
120 12 case 0:
121 case TXD_DXT1:
122
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 204 for (j = 0; j < avctx->height; j += 4) {
123
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 3264 for (i = 0; i < avctx->width; i += 4) {
124 3072 uint8_t *p = ptr + i * 4 + j * stride;
125 3072 int step = dxtc.dxt1_block(p, stride, gb.buffer);
126 3072 bytestream2_skip(&gb, step);
127 }
128 }
129 12 break;
130 2 case TXD_DXT3:
131
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 128 for (j = 0; j < avctx->height; j += 4) {
132
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 12348 for (i = 0; i < avctx->width; i += 4) {
133 12222 uint8_t *p = ptr + i * 4 + j * stride;
134 12222 int step = dxtc.dxt3_block(p, stride, gb.buffer);
135 12222 bytestream2_skip(&gb, step);
136 }
137 }
138 2 break;
139 ✗ default:
140 ✗ goto unsupported;
141 }
142 ✗ } else if (depth == 32) {
143 ✗ switch (d3d_format) {
144 ✗ case 0x15:
145 case 0x16:
146 ✗ for (y=0; y<h; y++) {
147 ✗ bytestream2_get_buffer(&gb, ptr, w * 4);
148 ✗ ptr += stride;
149 }
150 ✗ break;
151 ✗ default:
152 ✗ goto unsupported;
153 }
154 }
155
156 16 *got_frame = 1;
157
158 16 return avpkt->size;
159
160 ✗ unsupported:
161 ✗ avpriv_report_missing_feature(avctx, "d3d format (%08x)", d3d_format);
162 ✗ return AVERROR_PATCHWELCOME;
163 }
164
165 const FFCodec ff_txd_decoder = {
166 .p.name = "txd",
167 CODEC_LONG_NAME("Renderware TXD (TeXture Dictionary) image"),
168 .p.type = AVMEDIA_TYPE_VIDEO,
169 .p.id = AV_CODEC_ID_TXD,
170 .p.capabilities = AV_CODEC_CAP_DR1,
171 FF_CODEC_DECODE_CB(txd_decode_frame),
172 };
173