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 "s3tc.h"
30 
31 typedef struct TXDContext {
33 } TXDContext;
34 
35 static av_cold int txd_init(AVCodecContext *avctx) {
36  TXDContext *s = avctx->priv_data;
37 
39  avctx->coded_frame = &s->picture;
40 
41  return 0;
42 }
43 
44 static int txd_decode_frame(AVCodecContext *avctx, void *data, int *got_frame,
45  AVPacket *avpkt) {
46  TXDContext * const s = avctx->priv_data;
47  GetByteContext gb;
48  AVFrame *picture = data;
49  AVFrame * const p = &s->picture;
50  unsigned int version, w, h, d3d_format, depth, stride, flags;
51  unsigned int y, v;
52  uint8_t *ptr;
53  uint32_t *pal;
54 
55  bytestream2_init(&gb, avpkt->data, avpkt->size);
56  version = bytestream2_get_le32(&gb);
57  bytestream2_skip(&gb, 72);
58  d3d_format = bytestream2_get_le32(&gb);
59  w = bytestream2_get_le16(&gb);
60  h = bytestream2_get_le16(&gb);
61  depth = bytestream2_get_byte(&gb);
62  bytestream2_skip(&gb, 2);
63  flags = bytestream2_get_byte(&gb);
64 
65  if (version < 8 || version > 9) {
66  av_log(avctx, AV_LOG_ERROR, "texture data version %i is unsupported\n",
67  version);
68  return -1;
69  }
70 
71  if (depth == 8) {
72  avctx->pix_fmt = AV_PIX_FMT_PAL8;
73  } else if (depth == 16 || depth == 32) {
74  avctx->pix_fmt = AV_PIX_FMT_RGB32;
75  } else {
76  av_log(avctx, AV_LOG_ERROR, "depth of %i is unsupported\n", depth);
77  return -1;
78  }
79 
80  if (p->data[0])
81  avctx->release_buffer(avctx, p);
82 
83  if (av_image_check_size(w, h, 0, avctx))
84  return -1;
85  if (w != avctx->width || h != avctx->height)
86  avcodec_set_dimensions(avctx, w, h);
87  if (ff_get_buffer(avctx, p) < 0) {
88  av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
89  return -1;
90  }
91 
93 
94  ptr = p->data[0];
95  stride = p->linesize[0];
96 
97  if (depth == 8) {
98  pal = (uint32_t *) p->data[1];
99  for (y = 0; y < 256; y++) {
100  v = bytestream2_get_be32(&gb);
101  pal[y] = (v >> 8) + (v << 24);
102  }
103  bytestream2_skip(&gb, 4);
104  for (y=0; y<h; y++) {
105  bytestream2_get_buffer(&gb, ptr, w);
106  ptr += stride;
107  }
108  } else if (depth == 16) {
109  bytestream2_skip(&gb, 4);
110  switch (d3d_format) {
111  case 0:
112  if (!(flags & 1))
113  goto unsupported;
114  case FF_S3TC_DXT1:
115  ff_decode_dxt1(&gb, ptr, w, h, stride);
116  break;
117  case FF_S3TC_DXT3:
118  ff_decode_dxt3(&gb, ptr, w, h, stride);
119  break;
120  default:
121  goto unsupported;
122  }
123  } else if (depth == 32) {
124  switch (d3d_format) {
125  case 0x15:
126  case 0x16:
127  for (y=0; y<h; y++) {
128  bytestream2_get_buffer(&gb, ptr, w * 4);
129  ptr += stride;
130  }
131  break;
132  default:
133  goto unsupported;
134  }
135  }
136 
137  *picture = s->picture;
138  *got_frame = 1;
139 
140  return avpkt->size;
141 
142 unsupported:
143  av_log(avctx, AV_LOG_ERROR, "unsupported d3d format (%08x)\n", d3d_format);
144  return -1;
145 }
146 
147 static av_cold int txd_end(AVCodecContext *avctx) {
148  TXDContext *s = avctx->priv_data;
149 
150  if (s->picture.data[0])
151  avctx->release_buffer(avctx, &s->picture);
152 
153  return 0;
154 }
155 
157  .name = "txd",
158  .type = AVMEDIA_TYPE_VIDEO,
159  .id = AV_CODEC_ID_TXD,
160  .priv_data_size = sizeof(TXDContext),
161  .init = txd_init,
162  .close = txd_end,
164  .capabilities = CODEC_CAP_DR1,
165  .long_name = NULL_IF_CONFIG_SMALL("Renderware TXD (TeXture Dictionary) image"),
166 };
void ff_decode_dxt3(GetByteContext *gb, uint8_t *dst, const unsigned int w, const unsigned int h, const unsigned int stride)
Decode DXT3 encoded data to RGB32.
Definition: s3tc.c:88
This structure describes decoded (raw) audio or video data.
Definition: avcodec.h:989
static av_cold int txd_init(AVCodecContext *avctx)
Definition: txd.c:35
void(* release_buffer)(struct AVCodecContext *c, AVFrame *pic)
Called to release buffers which were allocated with get_buffer.
Definition: avcodec.h:2259
misc image utilities
AVCodec ff_txd_decoder
Definition: txd.c:156
AVFrame * coded_frame
the picture in the bitstream
Definition: avcodec.h:2725
void avcodec_set_dimensions(AVCodecContext *s, int width, int height)
Definition: utils.c:149
int size
Definition: avcodec.h:916
enum AVPixelFormat pix_fmt
Pixel format, see AV_PIX_FMT_xxx.
Definition: avcodec.h:1533
static av_always_inline void bytestream2_init(GetByteContext *g, const uint8_t *buf, int buf_size)
Definition: bytestream.h:130
Definition: txd.c:31
int stride
Definition: mace.c:144
AVCodec.
Definition: avcodec.h:2960
static int decode(MimicContext *ctx, int quality, int num_coeffs, int is_iframe)
Definition: mimic.c:228
uint8_t
8 bit with PIX_FMT_RGB32 palette
Definition: pixfmt.h:76
AVFrame picture
Definition: txd.c:32
const char data[16]
Definition: mxf.c:66
uint8_t * data
Definition: avcodec.h:915
static int flags
Definition: log.c:42
#define FF_S3TC_DXT3
Definition: s3tc.h:30
static int init(AVCodecParserContext *s)
Definition: h264_parser.c:335
static int txd_decode_frame(AVCodecContext *avctx, void *data, int *got_frame, AVPacket *avpkt)
Definition: txd.c:44
static av_always_inline void bytestream2_skip(GetByteContext *g, unsigned int size)
Definition: bytestream.h:159
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:88
static av_always_inline unsigned int bytestream2_get_buffer(GetByteContext *g, uint8_t *dst, unsigned int size)
Definition: bytestream.h:248
void av_log(void *avcl, int level, const char *fmt,...)
Definition: log.c:146
const char * name
Name of the codec implementation.
Definition: avcodec.h:2967
int av_image_check_size(unsigned int w, unsigned int h, int log_offset, void *log_ctx)
Check if the given dimension of an image is valid, meaning that all bytes of the image can be address...
Definition: imgutils.c:220
void ff_decode_dxt1(GetByteContext *gb, uint8_t *dst, const unsigned int w, const unsigned int h, const unsigned int stride)
Decode DXT1 encoded data to RGB32.
Definition: s3tc.c:77
static AVFrame * picture
enum AVPictureType pict_type
Picture type of the frame, see ?_TYPE below.
Definition: avcodec.h:1065
int width
picture width / height.
Definition: avcodec.h:1508
int ff_get_buffer(AVCodecContext *avctx, AVFrame *frame)
Get a buffer for a frame.
Definition: utils.c:464
external API header
version
Definition: ffv1enc.c:1069
int linesize[AV_NUM_DATA_POINTERS]
Size, in bytes, of the data for each picture/channel plane.
Definition: avcodec.h:1008
main external API structure.
Definition: avcodec.h:1339
static void close(AVCodecParserContext *s)
Definition: h264_parser.c:326
void avcodec_get_frame_defaults(AVFrame *frame)
Set the fields of the given AVFrame to default values.
Definition: utils.c:602
#define FF_S3TC_DXT1
Definition: s3tc.h:29
static av_cold int txd_end(AVCodecContext *avctx)
Definition: txd.c:147
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
Definition: avcodec.h:997
common internal api header.
void * priv_data
Definition: avcodec.h:1382
This structure stores compressed data.
Definition: avcodec.h:898
for(j=16;j >0;--j)
struct TXDContext TXDContext