FFmpeg
 All Data Structures Namespaces Files Functions Variables Typedefs Enumerations Enumerator Macros Groups Pages
txd.c
Go to the documentation of this file.
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  av_log(avctx, AV_LOG_ERROR, "texture data version %i is unsupported\n",
60  version);
61  return AVERROR_PATCHWELCOME;
62  }
63 
64  if (depth == 8) {
65  avctx->pix_fmt = AV_PIX_FMT_PAL8;
66  } else if (depth == 16 || depth == 32) {
67  avctx->pix_fmt = AV_PIX_FMT_RGBA;
68  } else {
69  av_log(avctx, AV_LOG_ERROR, "depth of %i is unsupported\n", depth);
70  return AVERROR_PATCHWELCOME;
71  }
72 
73  if ((ret = ff_set_dimensions(avctx, w, h)) < 0)
74  return ret;
75 
76  avctx->coded_width = FFALIGN(w, 4);
77  avctx->coded_height = FFALIGN(h, 4);
78 
79  if ((ret = ff_get_buffer(avctx, p, 0)) < 0)
80  return ret;
81 
83 
84  ptr = p->data[0];
85  stride = p->linesize[0];
86 
87  if (depth == 8) {
88  pal = (uint32_t *) p->data[1];
89  for (y = 0; y < 256; y++) {
90  v = bytestream2_get_be32(&gb);
91  pal[y] = (v >> 8) + (v << 24);
92  }
93  if (bytestream2_get_bytes_left(&gb) < w * h)
94  return AVERROR_INVALIDDATA;
95  bytestream2_skip(&gb, 4);
96  for (y=0; y<h; y++) {
97  bytestream2_get_buffer(&gb, ptr, w);
98  ptr += stride;
99  }
100  } else if (depth == 16) {
101  bytestream2_skip(&gb, 4);
102  switch (d3d_format) {
103  case 0:
104  if (!(flags & 1))
105  goto unsupported;
106  case TXD_DXT1:
107  if (bytestream2_get_bytes_left(&gb) < AV_CEIL_RSHIFT(w, 2) * AV_CEIL_RSHIFT(h, 2) * 8)
108  return AVERROR_INVALIDDATA;
109  for (j = 0; j < avctx->height; j += 4) {
110  for (i = 0; i < avctx->width; i += 4) {
111  uint8_t *p = ptr + i * 4 + j * stride;
112  int step = dxtc.dxt1_block(p, stride, gb.buffer);
113  bytestream2_skip(&gb, step);
114  }
115  }
116  break;
117  case TXD_DXT3:
118  if (bytestream2_get_bytes_left(&gb) < AV_CEIL_RSHIFT(w, 2) * AV_CEIL_RSHIFT(h, 2) * 16)
119  return AVERROR_INVALIDDATA;
120  for (j = 0; j < avctx->height; j += 4) {
121  for (i = 0; i < avctx->width; i += 4) {
122  uint8_t *p = ptr + i * 4 + j * stride;
123  int step = dxtc.dxt3_block(p, stride, gb.buffer);
124  bytestream2_skip(&gb, step);
125  }
126  }
127  break;
128  default:
129  goto unsupported;
130  }
131  } else if (depth == 32) {
132  switch (d3d_format) {
133  case 0x15:
134  case 0x16:
135  if (bytestream2_get_bytes_left(&gb) < h * w * 4)
136  return AVERROR_INVALIDDATA;
137  for (y=0; y<h; y++) {
138  bytestream2_get_buffer(&gb, ptr, w * 4);
139  ptr += stride;
140  }
141  break;
142  default:
143  goto unsupported;
144  }
145  }
146 
147  *got_frame = 1;
148 
149  return avpkt->size;
150 
152  av_log(avctx, AV_LOG_ERROR, "unsupported d3d format (%08x)\n", d3d_format);
153  return AVERROR_PATCHWELCOME;
154 }
155 
157  .name = "txd",
158  .long_name = NULL_IF_CONFIG_SMALL("Renderware TXD (TeXture Dictionary) image"),
159  .type = AVMEDIA_TYPE_VIDEO,
160  .id = AV_CODEC_ID_TXD,
161  .decode = txd_decode_frame,
162  .capabilities = AV_CODEC_CAP_DR1,
163 };
#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:180
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:1841
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:156
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:210
Texture block (4x4) module.
int size
Definition: avcodec.h:1575
enum AVPixelFormat pix_fmt
Pixel format, see AV_PIX_FMT_xxx.
Definition: avcodec.h:1867
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:629
AVCodec.
Definition: avcodec.h:3531
uint8_t
8 bit with AV_PIX_FMT_RGB32 palette
Definition: pixfmt.h:73
uint8_t * data
Definition: avcodec.h:1574
const uint8_t * buffer
Definition: bytestream.h:34
#define FFALIGN(x, a)
Definition: macros.h:48
#define av_log(a,...)
static int txd_decode_frame(AVCodecContext *avctx, void *data, int *got_frame, AVPacket *avpkt)
Definition: txd.c:34
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:176
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:176
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:3538
int depth
Definition: v4l.c:62
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:599
enum AVPictureType pict_type
Picture type of the frame.
Definition: frame.h:254
#define TXD_DXT3
Definition: txd.c:32
int width
picture width / height.
Definition: avcodec.h:1826
#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:211
main external API structure.
Definition: avcodec.h:1639
int ff_get_buffer(AVCodecContext *avctx, AVFrame *frame, int flags)
Get a buffer for a frame.
Definition: utils.c:928
int coded_height
Definition: avcodec.h:1841
int(* dxt3_block)(uint8_t *dst, ptrdiff_t stride, const uint8_t *block)
Definition: texturedsp.h:49
static int flags
Definition: cpu.c:47
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
Definition: frame.h:194
common internal api header.
#define stride
static int unsupported(AVCodecContext *avctx)
Definition: iff.c:663
This structure stores compressed data.
Definition: avcodec.h:1551
#define AV_CODEC_CAP_DR1
Codec uses get_buffer() for allocating buffers and supports custom allocators.
Definition: avcodec.h:950
for(j=16;j >0;--j)
#define AV_CEIL_RSHIFT(a, b)
Definition: common.h:58