Libav
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 Libav.
8  *
9  * Libav 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  * Libav 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 Libav; 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 "avcodec.h"
27 #include "bytestream.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  av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
81  return ret;
82  }
83 
85 
86  ptr = p->data[0];
87  stride = p->linesize[0];
88 
89  if (depth == 8) {
90  pal = (uint32_t *) p->data[1];
91  for (y = 0; y < 256; y++) {
92  v = bytestream2_get_be32(&gb);
93  pal[y] = (v >> 8) + (v << 24);
94  }
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  for (j = 0; j < avctx->height; j += 4) {
108  for (i = 0; i < avctx->width; i += 4) {
109  uint8_t *p = ptr + i * 4 + j * stride;
110  int step = dxtc.dxt1_block(p, stride, gb.buffer);
111  bytestream2_skip(&gb, step);
112  }
113  }
114  break;
115  case TXD_DXT3:
116  for (j = 0; j < avctx->height; j += 4) {
117  for (i = 0; i < avctx->width; i += 4) {
118  uint8_t *p = ptr + i * 4 + j * stride;
119  int step = dxtc.dxt3_block(p, stride, gb.buffer);
120  bytestream2_skip(&gb, step);
121  }
122  }
123  break;
124  default:
125  goto unsupported;
126  }
127  } else if (depth == 32) {
128  switch (d3d_format) {
129  case 0x15:
130  case 0x16:
131  for (y=0; y<h; y++) {
132  bytestream2_get_buffer(&gb, ptr, w * 4);
133  ptr += stride;
134  }
135  break;
136  default:
137  goto unsupported;
138  }
139  }
140 
141  *got_frame = 1;
142 
143  return avpkt->size;
144 
145 unsupported:
146  av_log(avctx, AV_LOG_ERROR, "unsupported d3d format (%08x)\n", d3d_format);
147  return AVERROR_PATCHWELCOME;
148 }
149 
151  .name = "txd",
152  .long_name = NULL_IF_CONFIG_SMALL("Renderware TXD (TeXture Dictionary) image"),
153  .type = AVMEDIA_TYPE_VIDEO,
154  .id = AV_CODEC_ID_TXD,
155  .decode = txd_decode_frame,
156  .capabilities = AV_CODEC_CAP_DR1,
157 };
This structure describes decoded (raw) audio or video data.
Definition: frame.h:140
int coded_width
Bitstream width / height, may be different from width/height e.g.
Definition: avcodec.h:1595
misc image utilities
AVCodec ff_txd_decoder
Definition: txd.c:150
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:134
Texture block (4x4) module.
int size
Definition: avcodec.h:1347
av_log(ac->avr, AV_LOG_TRACE, "%d samples - audio_convert: %s to %s (%s)\, len, av_get_sample_fmt_name(ac->in_fmt), av_get_sample_fmt_name(ac->out_fmt), use_generic ? ac->func_descr_generic :ac->func_descr)
enum AVPixelFormat pix_fmt
Pixel format, see AV_PIX_FMT_xxx.
Definition: avcodec.h:1621
static av_always_inline void bytestream2_init(GetByteContext *g, const uint8_t *buf, int buf_size)
Definition: bytestream.h:132
int stride
Definition: mace.c:144
AVCodec.
Definition: avcodec.h:3120
uint8_t
8 bits with AV_PIX_FMT_RGB32 palette
Definition: pixfmt.h:70
const char data[16]
Definition: mxf.c:70
uint8_t * data
Definition: avcodec.h:1346
int(* dxt3_block)(uint8_t *dst, ptrdiff_t stride, const uint8_t *block)
Definition: texturedsp.h:49
const uint8_t * buffer
Definition: bytestream.h:33
static int flags
Definition: log.c:50
#define FFALIGN(x, a)
Definition: macros.h:48
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:124
static av_always_inline void bytestream2_skip(GetByteContext *g, unsigned int size)
Definition: bytestream.h:161
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:148
static av_always_inline unsigned int bytestream2_get_buffer(GetByteContext *g, uint8_t *dst, unsigned int size)
Definition: bytestream.h:260
const char * name
Name of the codec implementation.
Definition: avcodec.h:3127
packed RGBA 8:8:8:8, 32bpp, RGBARGBA...
Definition: pixfmt.h:90
#define TXD_DXT1
Definition: txd.c:31
av_cold void ff_texturedsp_init(TextureDSPContext *c)
Definition: texturedsp.c:598
enum AVPictureType pict_type
Picture type of the frame.
Definition: frame.h:201
#define TXD_DXT3
Definition: txd.c:32
int width
picture width / height.
Definition: avcodec.h:1580
D3DFORMAT d3d_format
#define AVERROR_PATCHWELCOME
Not yet implemented in Libav, patches welcome.
Definition: error.h:57
Libavcodec external API header.
version
Definition: ffv1enc.c:1091
int linesize[AV_NUM_DATA_POINTERS]
For video, size in bytes of each picture line.
Definition: frame.h:158
main external API structure.
Definition: avcodec.h:1409
int ff_get_buffer(AVCodecContext *avctx, AVFrame *frame, int flags)
Get a buffer for a frame.
Definition: utils.c:589
int(* dxt1_block)(uint8_t *dst, ptrdiff_t stride, const uint8_t *block)
Definition: texturedsp.h:46
int coded_height
Definition: avcodec.h:1595
static int step
Definition: avplay.c:247
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
Definition: frame.h:146
common internal api header.
This structure stores compressed data.
Definition: avcodec.h:1323
#define AV_CODEC_CAP_DR1
Codec uses get_buffer() for allocating buffers and supports custom allocators.
Definition: avcodec.h:838
for(j=16;j >0;--j)