FFmpeg: libavcodec/txd.c Source File

FFmpeg
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  if (avpkt->size < 88)
47  return AVERROR_INVALIDDATA;
48 
49  ff_texturedsp_init(&dxtc);
50 
51  bytestream2_init(&gb, avpkt->data, avpkt->size);
52  version = bytestream2_get_le32(&gb);
53  bytestream2_skip(&gb, 72);
54  d3d_format = bytestream2_get_le32(&gb);
55  w = bytestream2_get_le16(&gb);
56  h = bytestream2_get_le16(&gb);
57  depth = bytestream2_get_byte(&gb);
58  bytestream2_skip(&gb, 2);
59  flags = bytestream2_get_byte(&gb);
60 
61  if (version < 8 || version > 9) {
62  avpriv_report_missing_feature(avctx, "Texture data version %u", version);
63  return AVERROR_PATCHWELCOME;
64  }
65 
66  if (depth == 8) {
67  avctx->pix_fmt = AV_PIX_FMT_PAL8;
68  if (bytestream2_get_bytes_left(&gb) < w * h + 4 * 256)
69  return AVERROR_INVALIDDATA;
70  } else if (depth == 16) {
71  avctx->pix_fmt = AV_PIX_FMT_RGBA;
72  switch (d3d_format) {
73  case 0:
74  if (!(flags & 1))
75  goto unsupported;
76  case TXD_DXT1:
77  if (bytestream2_get_bytes_left(&gb) < AV_CEIL_RSHIFT(w, 2) * AV_CEIL_RSHIFT(h, 2) * 8 + 4)
78  return AVERROR_INVALIDDATA;
79  break;
80  case TXD_DXT3:
81  if (bytestream2_get_bytes_left(&gb) < AV_CEIL_RSHIFT(w, 2) * AV_CEIL_RSHIFT(h, 2) * 16 + 4)
82  return AVERROR_INVALIDDATA;
83  }
84  } else if (depth == 32) {
85  avctx->pix_fmt = AV_PIX_FMT_RGBA;
86  if (bytestream2_get_bytes_left(&gb) < h * w * 4)
87  return AVERROR_INVALIDDATA;
88  } else {
89  avpriv_report_missing_feature(avctx, "Color depth of %u", depth);
90  return AVERROR_PATCHWELCOME;
91  }
92 
93  if ((ret = ff_set_dimensions(avctx, w, h)) < 0)
94  return ret;
95 
96  avctx->coded_width = FFALIGN(w, 4);
97  avctx->coded_height = FFALIGN(h, 4);
98 
99  if ((ret = ff_get_buffer(avctx, p, 0)) < 0)
100  return ret;
101 
102  p->pict_type = AV_PICTURE_TYPE_I;
103 
104  ptr = p->data[0];
105  stride = p->linesize[0];
106 
107  if (depth == 8) {
108  pal = (uint32_t *) p->data[1];
109  for (y = 0; y < 256; y++) {
110  v = bytestream2_get_be32(&gb);
111  pal[y] = (v >> 8) + (v << 24);
112  }
113  bytestream2_skip(&gb, 4);
114  for (y=0; y<h; y++) {
115  bytestream2_get_buffer(&gb, ptr, w);
116  ptr += stride;
117  }
118  } else if (depth == 16) {
119  bytestream2_skip(&gb, 4);
120  switch (d3d_format) {
121  case 0:
122  case TXD_DXT1:
123  for (j = 0; j < avctx->height; j += 4) {
124  for (i = 0; i < avctx->width; i += 4) {
125  uint8_t *p = ptr + i * 4 + j * stride;
126  int step = dxtc.dxt1_block(p, stride, gb.buffer);
127  bytestream2_skip(&gb, step);
128  }
129  }
130  break;
131  case TXD_DXT3:
132  for (j = 0; j < avctx->height; j += 4) {
133  for (i = 0; i < avctx->width; i += 4) {
134  uint8_t *p = ptr + i * 4 + j * stride;
135  int step = dxtc.dxt3_block(p, stride, gb.buffer);
136  bytestream2_skip(&gb, step);
137  }
138  }
139  break;
140  default:
141  goto unsupported;
142  }
143  } else if (depth == 32) {
144  switch (d3d_format) {
145  case 0x15:
146  case 0x16:
147  for (y=0; y<h; y++) {
148  bytestream2_get_buffer(&gb, ptr, w * 4);
149  ptr += stride;
150  }
151  break;
152  default:
153  goto unsupported;
154  }
155  }
156 
157  *got_frame = 1;
158 
159  return avpkt->size;
160 
161 unsupported:
162  avpriv_report_missing_feature(avctx, "d3d format (%08x)", d3d_format);
163  return AVERROR_PATCHWELCOME;
164 }
165 
166  const AVCodec ff_txd_decoder = {
167  .name = "txd",
168  .long_name = NULL_IF_CONFIG_SMALL("Renderware TXD (TeXture Dictionary) image"),
169  .type = AVMEDIA_TYPE_VIDEO,
170  .id = AV_CODEC_ID_TXD,
171  .decode = txd_decode_frame,
172  .capabilities = AV_CODEC_CAP_DR1,
173 };
AVCodec
AVCodec.
Definition: codec.h:202
stride
int stride
Definition: mace.c:144
TextureDSPContext::dxt1_block
int(* dxt1_block)(uint8_t *dst, ptrdiff_t stride, const uint8_t *block)
Definition: texturedsp.h:46
GetByteContext
Definition: bytestream.h:33
AVFrame
This structure describes decoded (raw) audio or video data.
Definition: frame.h:317
AV_CODEC_ID_TXD
@ AV_CODEC_ID_TXD
Definition: codec_id.h:155
step
trying all byte sequences megabyte in length and selecting the best looking sequence will yield cases to try But a word about which is also called distortion Distortion can be quantified by almost any quality measurement one chooses the sum of squared differences is used but more complex methods that consider psychovisual effects can be used as well It makes no difference in this discussion First step
Definition: rate_distortion.txt:58
w
uint8_t w
Definition: llviddspenc.c:38
internal.h
AVPacket::data
uint8_t * data
Definition: packet.h:373
data
const char data[16]
Definition: mxf.c:143
TXD_DXT3
#define TXD_DXT3
Definition: txd.c:32
TextureDSPContext
Definition: texturedsp.h:45
AVFrame::data
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
Definition: frame.h:338
bytestream2_skip
static av_always_inline void bytestream2_skip(GetByteContext *g, unsigned int size)
Definition: bytestream.h:168
texturedsp.h
d3d_format
DXGI_FORMAT d3d_format
Definition: hwcontext_d3d11va.c:84
AVCodecContext::coded_height
int coded_height
Definition: avcodec.h:571
TXD_DXT1
#define TXD_DXT1
Definition: txd.c:31
ff_txd_decoder
const AVCodec ff_txd_decoder
Definition: txd.c:166
intreadwrite.h
AV_CEIL_RSHIFT
#define AV_CEIL_RSHIFT(a, b)
Definition: common.h:51
GetByteContext::buffer
const uint8_t * buffer
Definition: bytestream.h:34
txd_decode_frame
static int txd_decode_frame(AVCodecContext *avctx, void *data, int *got_frame, AVPacket *avpkt)
Definition: txd.c:34
ff_texturedsp_init
av_cold void ff_texturedsp_init(TextureDSPContext *c)
Definition: texturedsp.c:637
AV_PIX_FMT_RGBA
@ AV_PIX_FMT_RGBA
packed RGBA 8:8:8:8, 32bpp, RGBARGBA...
Definition: pixfmt.h:93
AVERROR_PATCHWELCOME
#define AVERROR_PATCHWELCOME
Not yet implemented in FFmpeg, patches welcome.
Definition: error.h:64
AV_PICTURE_TYPE_I
@ AV_PICTURE_TYPE_I
Intra.
Definition: avutil.h:274
bytestream2_get_buffer
static av_always_inline unsigned int bytestream2_get_buffer(GetByteContext *g, uint8_t *dst, unsigned int size)
Definition: bytestream.h:267
bytestream2_get_bytes_left
static av_always_inline int bytestream2_get_bytes_left(GetByteContext *g)
Definition: bytestream.h:158
for
for(j=16;j >0;--j)
Definition: h264pred_template.c:469
AVFrame::pict_type
enum AVPictureType pict_type
Picture type of the frame.
Definition: frame.h:414
ff_get_buffer
int ff_get_buffer(AVCodecContext *avctx, AVFrame *frame, int flags)
Get a buffer for a frame.
Definition: decode.c:1652
AV_CODEC_CAP_DR1
#define AV_CODEC_CAP_DR1
Codec uses get_buffer() or get_encode_buffer() for allocating buffers and supports custom allocators.
Definition: codec.h:52
AVPacket::size
int size
Definition: packet.h:374
NULL_IF_CONFIG_SMALL
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification.
Definition: internal.h:117
avpriv_report_missing_feature
void avpriv_report_missing_feature(void *avc, const char *msg,...) av_printf_format(2
Log a generic warning message about a missing feature.
version
version
Definition: libkvazaar.c:313
i
#define i(width, name, range_min, range_max)
Definition: cbs_h2645.c:271
AVCodec::name
const char * name
Name of the codec implementation.
Definition: codec.h:209
AVCodecContext::height
int height
Definition: avcodec.h:556
AVCodecContext::pix_fmt
enum AVPixelFormat pix_fmt
Pixel format, see AV_PIX_FMT_xxx.
Definition: avcodec.h:593
avcodec.h
AV_PIX_FMT_PAL8
@ AV_PIX_FMT_PAL8
8 bits with AV_PIX_FMT_RGB32 palette
Definition: pixfmt.h:77
ret
ret
Definition: filter_design.txt:187
AVCodecContext
main external API structure.
Definition: avcodec.h:383
TextureDSPContext::dxt3_block
int(* dxt3_block)(uint8_t *dst, ptrdiff_t stride, const uint8_t *block)
Definition: texturedsp.h:49
AVCodecContext::coded_width
int coded_width
Bitstream width / height, may be different from width/height e.g.
Definition: avcodec.h:571
AVMEDIA_TYPE_VIDEO
@ AVMEDIA_TYPE_VIDEO
Definition: avutil.h:201
ff_set_dimensions
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:86
unsupported
static int unsupported(AVCodecContext *avctx)
Definition: iff.c:1520
FFALIGN
#define FFALIGN(x, a)
Definition: macros.h:78
AVPacket
This structure stores compressed data.
Definition: packet.h:350
AVCodecContext::width
int width
picture width / height.
Definition: avcodec.h:556
bytestream.h
imgutils.h
bytestream2_init
static av_always_inline void bytestream2_init(GetByteContext *g, const uint8_t *buf, int buf_size)
Definition: bytestream.h:137
flags
#define flags(name, subs,...)
Definition: cbs_av1.c:561
AVFrame::linesize
int linesize[AV_NUM_DATA_POINTERS]
For video, a positive or negative value, which is typically indicating the size in bytes of each pict...
Definition: frame.h:362
AVERROR_INVALIDDATA
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:61
h
h
Definition: vp9dsp_template.c:2038
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