FFmpeg coverage


Directory: ../../../ffmpeg/
File: src/libavcodec/txd.c
Date: 2022-07-07 01:21:54
Exec Total Coverage
Lines: 60 89 67.4%
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 "libavutil/intreadwrite.h"
25 #include "libavutil/imgutils.h"
26 #include "bytestream.h"
27 #include "avcodec.h"
28 #include "codec_internal.h"
29 #include "internal.h"
30 #include "texturedsp.h"
31
32 #define TXD_DXT1 0x31545844
33 #define TXD_DXT3 0x33545844
34
35 16 static int txd_decode_frame(AVCodecContext *avctx, AVFrame *p,
36 int *got_frame, AVPacket *avpkt)
37 {
38 GetByteContext gb;
39 TextureDSPContext dxtc;
40 unsigned int version, w, h, d3d_format, depth, stride, flags;
41 unsigned int y, v;
42 uint8_t *ptr;
43 uint32_t *pal;
44 int i, j;
45 int ret;
46
47
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16 if (avpkt->size < 88)
48 return AVERROR_INVALIDDATA;
49
50 16 ff_texturedsp_init(&dxtc);
51
52 16 bytestream2_init(&gb, avpkt->data, avpkt->size);
53 16 version = bytestream2_get_le32(&gb);
54 16 bytestream2_skip(&gb, 72);
55 16 d3d_format = bytestream2_get_le32(&gb);
56 16 w = bytestream2_get_le16(&gb);
57 16 h = bytestream2_get_le16(&gb);
58 16 depth = bytestream2_get_byte(&gb);
59 16 bytestream2_skip(&gb, 2);
60 16 flags = bytestream2_get_byte(&gb);
61
62
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16 if (version < 8 || version > 9) {
63 avpriv_report_missing_feature(avctx, "Texture data version %u", version);
64 return AVERROR_PATCHWELCOME;
65 }
66
67
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16 if (depth == 8) {
68 2 avctx->pix_fmt = AV_PIX_FMT_PAL8;
69
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2 if (bytestream2_get_bytes_left(&gb) < w * h + 4 * 256)
70 return AVERROR_INVALIDDATA;
71
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14 } else if (depth == 16) {
72 14 avctx->pix_fmt = AV_PIX_FMT_RGBA;
73
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14 switch (d3d_format) {
74 12 case 0:
75
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12 if (!(flags & 1))
76 goto unsupported;
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 }
85 } else if (depth == 32) {
86 avctx->pix_fmt = AV_PIX_FMT_RGBA;
87 if (bytestream2_get_bytes_left(&gb) < h * w * 4)
88 return AVERROR_INVALIDDATA;
89 } else {
90 avpriv_report_missing_feature(avctx, "Color depth of %u", depth);
91 return AVERROR_PATCHWELCOME;
92 }
93
94
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16 if ((ret = ff_set_dimensions(avctx, w, h)) < 0)
95 return ret;
96
97 16 avctx->coded_width = FFALIGN(w, 4);
98 16 avctx->coded_height = FFALIGN(h, 4);
99
100
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16 if ((ret = ff_get_buffer(avctx, p, 0)) < 0)
101 return ret;
102
103 16 p->pict_type = AV_PICTURE_TYPE_I;
104
105 16 ptr = p->data[0];
106 16 stride = p->linesize[0];
107
108
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16 if (depth == 8) {
109 2 pal = (uint32_t *) p->data[1];
110
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514 for (y = 0; y < 256; y++) {
111 512 v = bytestream2_get_be32(&gb);
112 512 pal[y] = (v >> 8) + (v << 24);
113 }
114 2 bytestream2_skip(&gb, 4);
115
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1026 for (y=0; y<h; y++) {
116 1024 bytestream2_get_buffer(&gb, ptr, w);
117 1024 ptr += stride;
118 }
119
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14 } else if (depth == 16) {
120 14 bytestream2_skip(&gb, 4);
121
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14 switch (d3d_format) {
122 12 case 0:
123 case TXD_DXT1:
124
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204 for (j = 0; j < avctx->height; j += 4) {
125
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3264 for (i = 0; i < avctx->width; i += 4) {
126 3072 uint8_t *p = ptr + i * 4 + j * stride;
127 3072 int step = dxtc.dxt1_block(p, stride, gb.buffer);
128 3072 bytestream2_skip(&gb, step);
129 }
130 }
131 12 break;
132 2 case TXD_DXT3:
133
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128 for (j = 0; j < avctx->height; j += 4) {
134
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12348 for (i = 0; i < avctx->width; i += 4) {
135 12222 uint8_t *p = ptr + i * 4 + j * stride;
136 12222 int step = dxtc.dxt3_block(p, stride, gb.buffer);
137 12222 bytestream2_skip(&gb, step);
138 }
139 }
140 2 break;
141 default:
142 goto unsupported;
143 }
144 } else if (depth == 32) {
145 switch (d3d_format) {
146 case 0x15:
147 case 0x16:
148 for (y=0; y<h; y++) {
149 bytestream2_get_buffer(&gb, ptr, w * 4);
150 ptr += stride;
151 }
152 break;
153 default:
154 goto unsupported;
155 }
156 }
157
158 16 *got_frame = 1;
159
160 16 return avpkt->size;
161
162 unsupported:
163 avpriv_report_missing_feature(avctx, "d3d format (%08x)", d3d_format);
164 return AVERROR_PATCHWELCOME;
165 }
166
167 const FFCodec ff_txd_decoder = {
168 .p.name = "txd",
169 .p.long_name = NULL_IF_CONFIG_SMALL("Renderware TXD (TeXture Dictionary) image"),
170 .p.type = AVMEDIA_TYPE_VIDEO,
171 .p.id = AV_CODEC_ID_TXD,
172 .p.capabilities = AV_CODEC_CAP_DR1,
173 FF_CODEC_DECODE_CB(txd_decode_frame),
174 };
175