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txd.c
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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 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  avpriv_report_missing_feature(avctx, "Texture data version %u", version);
60  return AVERROR_PATCHWELCOME;
61  }
62 
63  if (depth == 8) {
64  avctx->pix_fmt = AV_PIX_FMT_PAL8;
65  } else if (depth == 16 || depth == 32) {
66  avctx->pix_fmt = AV_PIX_FMT_RGBA;
67  } else {
68  avpriv_report_missing_feature(avctx, "Color depth of %u", depth);
69  return AVERROR_PATCHWELCOME;
70  }
71 
72  if ((ret = ff_set_dimensions(avctx, w, h)) < 0)
73  return ret;
74 
75  avctx->coded_width = FFALIGN(w, 4);
76  avctx->coded_height = FFALIGN(h, 4);
77 
78  if ((ret = ff_get_buffer(avctx, p, 0)) < 0)
79  return ret;
80 
82 
83  ptr = p->data[0];
84  stride = p->linesize[0];
85 
86  if (depth == 8) {
87  pal = (uint32_t *) p->data[1];
88  for (y = 0; y < 256; y++) {
89  v = bytestream2_get_be32(&gb);
90  pal[y] = (v >> 8) + (v << 24);
91  }
92  if (bytestream2_get_bytes_left(&gb) < w * h)
93  return AVERROR_INVALIDDATA;
94  bytestream2_skip(&gb, 4);
95  for (y=0; y<h; y++) {
96  bytestream2_get_buffer(&gb, ptr, w);
97  ptr += stride;
98  }
99  } else if (depth == 16) {
100  bytestream2_skip(&gb, 4);
101  switch (d3d_format) {
102  case 0:
103  if (!(flags & 1))
104  goto unsupported;
105  case TXD_DXT1:
106  if (bytestream2_get_bytes_left(&gb) < AV_CEIL_RSHIFT(w, 2) * AV_CEIL_RSHIFT(h, 2) * 8)
107  return AVERROR_INVALIDDATA;
108  for (j = 0; j < avctx->height; j += 4) {
109  for (i = 0; i < avctx->width; i += 4) {
110  uint8_t *p = ptr + i * 4 + j * stride;
111  int step = dxtc.dxt1_block(p, stride, gb.buffer);
112  bytestream2_skip(&gb, step);
113  }
114  }
115  break;
116  case TXD_DXT3:
117  if (bytestream2_get_bytes_left(&gb) < AV_CEIL_RSHIFT(w, 2) * AV_CEIL_RSHIFT(h, 2) * 16)
118  return AVERROR_INVALIDDATA;
119  for (j = 0; j < avctx->height; j += 4) {
120  for (i = 0; i < avctx->width; i += 4) {
121  uint8_t *p = ptr + i * 4 + j * stride;
122  int step = dxtc.dxt3_block(p, stride, gb.buffer);
123  bytestream2_skip(&gb, step);
124  }
125  }
126  break;
127  default:
128  goto unsupported;
129  }
130  } else if (depth == 32) {
131  switch (d3d_format) {
132  case 0x15:
133  case 0x16:
134  if (bytestream2_get_bytes_left(&gb) < h * w * 4)
135  return AVERROR_INVALIDDATA;
136  for (y=0; y<h; y++) {
137  bytestream2_get_buffer(&gb, ptr, w * 4);
138  ptr += stride;
139  }
140  break;
141  default:
142  goto unsupported;
143  }
144  }
145 
146  *got_frame = 1;
147 
148  return avpkt->size;
149 
151  avpriv_report_missing_feature(avctx, "d3d format (%08x)", d3d_format);
152  return AVERROR_PATCHWELCOME;
153 }
154 
156  .name = "txd",
157  .long_name = NULL_IF_CONFIG_SMALL("Renderware TXD (TeXture Dictionary) image"),
158  .type = AVMEDIA_TYPE_VIDEO,
159  .id = AV_CODEC_ID_TXD,
160  .decode = txd_decode_frame,
161  .capabilities = AV_CODEC_CAP_DR1,
162 };
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:59
This structure describes decoded (raw) audio or video data.
Definition: frame.h:201
ptrdiff_t const GLvoid * data
Definition: opengl_enc.c:101
int coded_width
Bitstream width / height, may be different from width/height e.g.
Definition: avcodec.h:1963
int(* dxt1_block)(uint8_t *dst, ptrdiff_t stride, const uint8_t *block)
Definition: texturedsp.h:46
misc image utilities
AVCodec ff_txd_decoder
Definition: txd.c:155
int ff_set_dimensions(AVCodecContext *s, int width, int height)
Check that the provided frame dimensions are valid and set them on the codec context.
Definition: utils.c:211
Texture block (4x4) module.
int size
Definition: avcodec.h:1680
enum AVPixelFormat pix_fmt
Pixel format, see AV_PIX_FMT_xxx.
Definition: avcodec.h:1989
static av_always_inline void bytestream2_init(GetByteContext *g, const uint8_t *buf, int buf_size)
Definition: bytestream.h:133
int version
Definition: avisynth_c.h:766
AVCodec.
Definition: avcodec.h:3739
uint8_t
8 bits with AV_PIX_FMT_RGB32 palette
Definition: pixfmt.h:73
uint8_t * data
Definition: avcodec.h:1679
const uint8_t * buffer
Definition: bytestream.h:34
static int flags
Definition: log.c:57
#define FFALIGN(x, a)
Definition: macros.h:48
DXGI_FORMAT d3d_format
static int txd_decode_frame(AVCodecContext *avctx, void *data, int *got_frame, AVPacket *avpkt)
Definition: txd.c:34
static av_always_inline void bytestream2_skip(GetByteContext *g, unsigned int size)
Definition: bytestream.h:164
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:179
static av_always_inline unsigned int bytestream2_get_buffer(GetByteContext *g, uint8_t *dst, unsigned int size)
Definition: bytestream.h:263
static av_always_inline unsigned int bytestream2_get_bytes_left(GetByteContext *g)
Definition: bytestream.h:154
const char * name
Name of the codec implementation.
Definition: avcodec.h:3746
packed RGBA 8:8:8:8, 32bpp, RGBARGBA...
Definition: pixfmt.h:94
#define TXD_DXT1
Definition: txd.c:31
av_cold void ff_texturedsp_init(TextureDSPContext *c)
Definition: texturedsp.c:621
enum AVPictureType pict_type
Picture type of the frame.
Definition: frame.h:284
#define TXD_DXT3
Definition: txd.c:32
int width
picture width / height.
Definition: avcodec.h:1948
#define AVERROR_PATCHWELCOME
Not yet implemented in FFmpeg, patches welcome.
Definition: error.h:62
Libavcodec external API header.
int linesize[AV_NUM_DATA_POINTERS]
For video, size in bytes of each picture line.
Definition: frame.h:232
main external API structure.
Definition: avcodec.h:1761
int ff_get_buffer(AVCodecContext *avctx, AVFrame *frame, int flags)
Get a buffer for a frame.
Definition: decode.c:1664
int coded_height
Definition: avcodec.h:1963
int(* dxt3_block)(uint8_t *dst, ptrdiff_t stride, const uint8_t *block)
Definition: texturedsp.h:49
void avpriv_report_missing_feature(void *avc, const char *msg,...) av_printf_format(2
Log a generic warning message about a missing feature.
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
Definition: frame.h:215
common internal api header.
#define stride
static int unsupported(AVCodecContext *avctx)
Definition: iff.c:1482
This structure stores compressed data.
Definition: avcodec.h:1656
#define AV_CODEC_CAP_DR1
Codec uses get_buffer() for allocating buffers and supports custom allocators.
Definition: avcodec.h:1002
for(j=16;j >0;--j)
#define AV_CEIL_RSHIFT(a, b)
Definition: common.h:58