FFmpeg coverage


Directory: ../../../ffmpeg/
File: src/libavcodec/txd.c
Date: 2021-09-24 20:55:06
Exec Total Coverage
Lines: 57 84 67.9%
Branches: 29 52 55.8%

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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 "texturedsp.h"
30
31 #define TXD_DXT1 0x31545844
32 #define TXD_DXT3 0x33545844
33
34 16 static int txd_decode_frame(AVCodecContext *avctx, void *data, int *got_frame,
35 AVPacket *avpkt) {
36 GetByteContext gb;
37 TextureDSPContext dxtc;
38 16 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
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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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14 } else if (depth == 16 || depth == 32) {
69 14 avctx->pix_fmt = AV_PIX_FMT_RGBA;
70 } else {
71 avpriv_report_missing_feature(avctx, "Color depth of %u", depth);
72 return AVERROR_PATCHWELCOME;
73 }
74
75
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16 if ((ret = ff_set_dimensions(avctx, w, h)) < 0)
76 return ret;
77
78 16 avctx->coded_width = FFALIGN(w, 4);
79 16 avctx->coded_height = FFALIGN(h, 4);
80
81
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16 if ((ret = ff_get_buffer(avctx, p, 0)) < 0)
82 return ret;
83
84 16 p->pict_type = AV_PICTURE_TYPE_I;
85
86 16 ptr = p->data[0];
87 16 stride = p->linesize[0];
88
89
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16 if (depth == 8) {
90 2 pal = (uint32_t *) p->data[1];
91
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514 for (y = 0; y < 256; y++) {
92 512 v = bytestream2_get_be32(&gb);
93 512 pal[y] = (v >> 8) + (v << 24);
94 }
95
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2 if (bytestream2_get_bytes_left(&gb) < w * h)
96 return AVERROR_INVALIDDATA;
97 2 bytestream2_skip(&gb, 4);
98
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1026 for (y=0; y<h; y++) {
99 1024 bytestream2_get_buffer(&gb, ptr, w);
100 1024 ptr += stride;
101 }
102
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14 } else if (depth == 16) {
103 14 bytestream2_skip(&gb, 4);
104
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14 switch (d3d_format) {
105 12 case 0:
106
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12 if (!(flags & 1))
107 goto unsupported;
108 case TXD_DXT1:
109
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12 if (bytestream2_get_bytes_left(&gb) < AV_CEIL_RSHIFT(w, 2) * AV_CEIL_RSHIFT(h, 2) * 8)
110 return AVERROR_INVALIDDATA;
111
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204 for (j = 0; j < avctx->height; j += 4) {
112
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3264 for (i = 0; i < avctx->width; i += 4) {
113 3072 uint8_t *p = ptr + i * 4 + j * stride;
114 3072 int step = dxtc.dxt1_block(p, stride, gb.buffer);
115 3072 bytestream2_skip(&gb, step);
116 }
117 }
118 12 break;
119 2 case TXD_DXT3:
120
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2 if (bytestream2_get_bytes_left(&gb) < AV_CEIL_RSHIFT(w, 2) * AV_CEIL_RSHIFT(h, 2) * 16)
121 return AVERROR_INVALIDDATA;
122
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128 for (j = 0; j < avctx->height; j += 4) {
123
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12348 for (i = 0; i < avctx->width; i += 4) {
124 12222 uint8_t *p = ptr + i * 4 + j * stride;
125 12222 int step = dxtc.dxt3_block(p, stride, gb.buffer);
126 12222 bytestream2_skip(&gb, step);
127 }
128 }
129 2 break;
130 default:
131 goto unsupported;
132 }
133 } else if (depth == 32) {
134 switch (d3d_format) {
135 case 0x15:
136 case 0x16:
137 if (bytestream2_get_bytes_left(&gb) < h * w * 4)
138 return AVERROR_INVALIDDATA;
139 for (y=0; y<h; y++) {
140 bytestream2_get_buffer(&gb, ptr, w * 4);
141 ptr += stride;
142 }
143 break;
144 default:
145 goto unsupported;
146 }
147 }
148
149 16 *got_frame = 1;
150
151 16 return avpkt->size;
152
153 unsupported:
154 avpriv_report_missing_feature(avctx, "d3d format (%08x)", d3d_format);
155 return AVERROR_PATCHWELCOME;
156 }
157
158 const AVCodec ff_txd_decoder = {
159 .name = "txd",
160 .long_name = NULL_IF_CONFIG_SMALL("Renderware TXD (TeXture Dictionary) image"),
161 .type = AVMEDIA_TYPE_VIDEO,
162 .id = AV_CODEC_ID_TXD,
163 .decode = txd_decode_frame,
164 .capabilities = AV_CODEC_CAP_DR1,
165 };
166