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dds.c
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1 /*
2  * DirectDraw Surface image decoder
3  * Copyright (C) 2015 Vittorio Giovara <vittorio.giovara@gmail.com>
4  *
5  * This file is part of FFmpeg.
6  *
7  * FFmpeg is free software; you can redistribute it and/or
8  * modify it under the terms of the GNU Lesser General Public
9  * License as published by the Free Software Foundation; either
10  * version 2.1 of the License, or (at your option) any later version.
11  *
12  * FFmpeg is distributed in the hope that it will be useful,
13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15  * Lesser General Public License for more details.
16  *
17  * You should have received a copy of the GNU Lesser General Public
18  * License along with FFmpeg; if not, write to the Free Software
19  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20  */
21 
22 /**
23  * @file
24  * DDS decoder
25  *
26  * https://msdn.microsoft.com/en-us/library/bb943982%28v=vs.85%29.aspx
27  */
28 
29 #include <stdint.h>
30 
31 #include "libavutil/libm.h"
32 #include "libavutil/imgutils.h"
33 
34 #include "avcodec.h"
35 #include "bytestream.h"
36 #include "internal.h"
37 #include "texturedsp.h"
38 #include "thread.h"
39 
40 #define DDPF_FOURCC (1 << 2)
41 #define DDPF_PALETTE (1 << 5)
42 #define DDPF_NORMALMAP (1U << 31)
43 
45  DDS_NONE = 0,
58 };
59 
67 
74 
97 };
98 
99 typedef struct DDSContext {
102 
104  int paletted;
105  int bpp;
107 
108  const uint8_t *tex_data; // Compressed texture
109  int tex_ratio; // Compression ratio
110  int slice_count; // Number of slices for threaded operations
111 
112  /* Pointer to the selected compress or decompress function. */
113  int (*tex_funct)(uint8_t *dst, ptrdiff_t stride, const uint8_t *block);
114 } DDSContext;
115 
117 {
118  DDSContext *ctx = avctx->priv_data;
119  GetByteContext *gbc = &ctx->gbc;
120  uint32_t flags, fourcc, gimp_tag;
121  enum DDSDXGIFormat dxgi;
122  int size, bpp, r, g, b, a;
123  int alpha_exponent, ycocg_classic, ycocg_scaled, normal_map, array;
124 
125  /* Alternative DDS implementations use reserved1 as custom header. */
126  bytestream2_skip(gbc, 4 * 3);
127  gimp_tag = bytestream2_get_le32(gbc);
128  alpha_exponent = gimp_tag == MKTAG('A', 'E', 'X', 'P');
129  ycocg_classic = gimp_tag == MKTAG('Y', 'C', 'G', '1');
130  ycocg_scaled = gimp_tag == MKTAG('Y', 'C', 'G', '2');
131  bytestream2_skip(gbc, 4 * 7);
132 
133  /* Now the real DDPF starts. */
134  size = bytestream2_get_le32(gbc);
135  if (size != 32) {
136  av_log(avctx, AV_LOG_ERROR, "Invalid pixel format header %d.\n", size);
137  return AVERROR_INVALIDDATA;
138  }
139  flags = bytestream2_get_le32(gbc);
140  ctx->compressed = flags & DDPF_FOURCC;
141  ctx->paletted = flags & DDPF_PALETTE;
142  normal_map = flags & DDPF_NORMALMAP;
143  fourcc = bytestream2_get_le32(gbc);
144 
145  if (ctx->compressed && ctx->paletted) {
146  av_log(avctx, AV_LOG_WARNING,
147  "Disabling invalid palette flag for compressed dds.\n");
148  ctx->paletted = 0;
149  }
150 
151  bpp = ctx->bpp = bytestream2_get_le32(gbc); // rgbbitcount
152  r = bytestream2_get_le32(gbc); // rbitmask
153  g = bytestream2_get_le32(gbc); // gbitmask
154  b = bytestream2_get_le32(gbc); // bbitmask
155  a = bytestream2_get_le32(gbc); // abitmask
156 
157  bytestream2_skip(gbc, 4); // caps
158  bytestream2_skip(gbc, 4); // caps2
159  bytestream2_skip(gbc, 4); // caps3
160  bytestream2_skip(gbc, 4); // caps4
161  bytestream2_skip(gbc, 4); // reserved2
162 
163  av_log(avctx, AV_LOG_VERBOSE, "fourcc %s bpp %d "
164  "r 0x%x g 0x%x b 0x%x a 0x%x\n", av_fourcc2str(fourcc), bpp, r, g, b, a);
165  if (gimp_tag)
166  av_log(avctx, AV_LOG_VERBOSE, "and GIMP-DDS tag %s\n", av_fourcc2str(gimp_tag));
167 
168  if (ctx->compressed)
169  avctx->pix_fmt = AV_PIX_FMT_RGBA;
170 
171  if (ctx->compressed) {
172  switch (fourcc) {
173  case MKTAG('D', 'X', 'T', '1'):
174  ctx->tex_ratio = 8;
175  ctx->tex_funct = ctx->texdsp.dxt1a_block;
176  break;
177  case MKTAG('D', 'X', 'T', '2'):
178  ctx->tex_ratio = 16;
179  ctx->tex_funct = ctx->texdsp.dxt2_block;
180  break;
181  case MKTAG('D', 'X', 'T', '3'):
182  ctx->tex_ratio = 16;
183  ctx->tex_funct = ctx->texdsp.dxt3_block;
184  break;
185  case MKTAG('D', 'X', 'T', '4'):
186  ctx->tex_ratio = 16;
187  ctx->tex_funct = ctx->texdsp.dxt4_block;
188  break;
189  case MKTAG('D', 'X', 'T', '5'):
190  ctx->tex_ratio = 16;
191  if (ycocg_scaled)
192  ctx->tex_funct = ctx->texdsp.dxt5ys_block;
193  else if (ycocg_classic)
194  ctx->tex_funct = ctx->texdsp.dxt5y_block;
195  else
196  ctx->tex_funct = ctx->texdsp.dxt5_block;
197  break;
198  case MKTAG('R', 'X', 'G', 'B'):
199  ctx->tex_ratio = 16;
200  ctx->tex_funct = ctx->texdsp.dxt5_block;
201  /* This format may be considered as a normal map,
202  * but it is handled differently in a separate postproc. */
203  ctx->postproc = DDS_SWIZZLE_RXGB;
204  normal_map = 0;
205  break;
206  case MKTAG('A', 'T', 'I', '1'):
207  case MKTAG('B', 'C', '4', 'U'):
208  ctx->tex_ratio = 8;
209  ctx->tex_funct = ctx->texdsp.rgtc1u_block;
210  break;
211  case MKTAG('B', 'C', '4', 'S'):
212  ctx->tex_ratio = 8;
213  ctx->tex_funct = ctx->texdsp.rgtc1s_block;
214  break;
215  case MKTAG('A', 'T', 'I', '2'):
216  /* RGT2 variant with swapped R and G (3Dc)*/
217  ctx->tex_ratio = 16;
218  ctx->tex_funct = ctx->texdsp.dxn3dc_block;
219  break;
220  case MKTAG('B', 'C', '5', 'U'):
221  ctx->tex_ratio = 16;
222  ctx->tex_funct = ctx->texdsp.rgtc2u_block;
223  break;
224  case MKTAG('B', 'C', '5', 'S'):
225  ctx->tex_ratio = 16;
226  ctx->tex_funct = ctx->texdsp.rgtc2s_block;
227  break;
228  case MKTAG('U', 'Y', 'V', 'Y'):
229  ctx->compressed = 0;
230  avctx->pix_fmt = AV_PIX_FMT_UYVY422;
231  break;
232  case MKTAG('Y', 'U', 'Y', '2'):
233  ctx->compressed = 0;
234  avctx->pix_fmt = AV_PIX_FMT_YUYV422;
235  break;
236  case MKTAG('P', '8', ' ', ' '):
237  /* ATI Palette8, same as normal palette */
238  ctx->compressed = 0;
239  ctx->paletted = 1;
240  avctx->pix_fmt = AV_PIX_FMT_PAL8;
241  break;
242  case MKTAG('G', '1', ' ', ' '):
243  ctx->compressed = 0;
244  avctx->pix_fmt = AV_PIX_FMT_MONOBLACK;
245  break;
246  case MKTAG('D', 'X', '1', '0'):
247  /* DirectX 10 extra header */
248  dxgi = bytestream2_get_le32(gbc);
249  bytestream2_skip(gbc, 4); // resourceDimension
250  bytestream2_skip(gbc, 4); // miscFlag
251  array = bytestream2_get_le32(gbc);
252  bytestream2_skip(gbc, 4); // miscFlag2
253 
254  if (array != 0)
255  av_log(avctx, AV_LOG_VERBOSE,
256  "Found array of size %d (ignored).\n", array);
257 
258  /* Only BC[1-5] are actually compressed. */
259  ctx->compressed = (dxgi >= 70) && (dxgi <= 84);
260 
261  av_log(avctx, AV_LOG_VERBOSE, "DXGI format %d.\n", dxgi);
262  switch (dxgi) {
263  /* RGB types. */
270  avctx->pix_fmt = AV_PIX_FMT_BGRA64;
271  break;
273  avctx->colorspace = AVCOL_SPC_RGB;
279  avctx->pix_fmt = AV_PIX_FMT_BGRA;
280  break;
282  avctx->colorspace = AVCOL_SPC_RGB;
285  avctx->pix_fmt = AV_PIX_FMT_RGBA;
286  break;
288  avctx->colorspace = AVCOL_SPC_RGB;
291  avctx->pix_fmt = AV_PIX_FMT_RGBA; // opaque
292  break;
294  avctx->pix_fmt = AV_PIX_FMT_RGB565LE;
295  break;
296  /* Texture types. */
298  avctx->colorspace = AVCOL_SPC_RGB;
301  ctx->tex_ratio = 8;
302  ctx->tex_funct = ctx->texdsp.dxt1a_block;
303  break;
305  avctx->colorspace = AVCOL_SPC_RGB;
308  ctx->tex_ratio = 16;
309  ctx->tex_funct = ctx->texdsp.dxt3_block;
310  break;
312  avctx->colorspace = AVCOL_SPC_RGB;
315  ctx->tex_ratio = 16;
316  ctx->tex_funct = ctx->texdsp.dxt5_block;
317  break;
320  ctx->tex_ratio = 8;
321  ctx->tex_funct = ctx->texdsp.rgtc1u_block;
322  break;
324  ctx->tex_ratio = 8;
325  ctx->tex_funct = ctx->texdsp.rgtc1s_block;
326  break;
329  ctx->tex_ratio = 16;
330  ctx->tex_funct = ctx->texdsp.rgtc2u_block;
331  break;
333  ctx->tex_ratio = 16;
334  ctx->tex_funct = ctx->texdsp.rgtc2s_block;
335  break;
336  default:
337  av_log(avctx, AV_LOG_ERROR,
338  "Unsupported DXGI format %d.\n", dxgi);
339  return AVERROR_INVALIDDATA;
340  }
341  break;
342  default:
343  av_log(avctx, AV_LOG_ERROR, "Unsupported %s fourcc.\n", av_fourcc2str(fourcc));
344  return AVERROR_INVALIDDATA;
345  }
346  } else if (ctx->paletted) {
347  if (bpp == 8) {
348  avctx->pix_fmt = AV_PIX_FMT_PAL8;
349  } else {
350  av_log(avctx, AV_LOG_ERROR, "Unsupported palette bpp %d.\n", bpp);
351  return AVERROR_INVALIDDATA;
352  }
353  } else {
354  /* 4 bpp */
355  if (bpp == 4 && r == 0 && g == 0 && b == 0 && a == 0)
356  avctx->pix_fmt = AV_PIX_FMT_PAL8;
357  /* 8 bpp */
358  else if (bpp == 8 && r == 0xff && g == 0 && b == 0 && a == 0)
359  avctx->pix_fmt = AV_PIX_FMT_GRAY8;
360  else if (bpp == 8 && r == 0 && g == 0 && b == 0 && a == 0xff)
361  avctx->pix_fmt = AV_PIX_FMT_GRAY8;
362  /* 16 bpp */
363  else if (bpp == 16 && r == 0xff && g == 0 && b == 0 && a == 0xff00)
364  avctx->pix_fmt = AV_PIX_FMT_YA8;
365  else if (bpp == 16 && r == 0xff00 && g == 0 && b == 0 && a == 0xff) {
366  avctx->pix_fmt = AV_PIX_FMT_YA8;
367  ctx->postproc = DDS_SWAP_ALPHA;
368  }
369  else if (bpp == 16 && r == 0xffff && g == 0 && b == 0 && a == 0)
370  avctx->pix_fmt = AV_PIX_FMT_GRAY16LE;
371  else if (bpp == 16 && r == 0x7c00 && g == 0x3e0 && b == 0x1f && a == 0)
372  avctx->pix_fmt = AV_PIX_FMT_RGB555LE;
373  else if (bpp == 16 && r == 0x7c00 && g == 0x3e0 && b == 0x1f && a == 0x8000)
374  avctx->pix_fmt = AV_PIX_FMT_RGB555LE; // alpha ignored
375  else if (bpp == 16 && r == 0xf800 && g == 0x7e0 && b == 0x1f && a == 0)
376  avctx->pix_fmt = AV_PIX_FMT_RGB565LE;
377  /* 24 bpp */
378  else if (bpp == 24 && r == 0xff0000 && g == 0xff00 && b == 0xff && a == 0)
379  avctx->pix_fmt = AV_PIX_FMT_BGR24;
380  /* 32 bpp */
381  else if (bpp == 32 && r == 0xff0000 && g == 0xff00 && b == 0xff && a == 0)
382  avctx->pix_fmt = AV_PIX_FMT_BGR0; // opaque
383  else if (bpp == 32 && r == 0xff && g == 0xff00 && b == 0xff0000 && a == 0)
384  avctx->pix_fmt = AV_PIX_FMT_RGB0; // opaque
385  else if (bpp == 32 && r == 0xff0000 && g == 0xff00 && b == 0xff && a == 0xff000000)
386  avctx->pix_fmt = AV_PIX_FMT_BGRA;
387  else if (bpp == 32 && r == 0xff && g == 0xff00 && b == 0xff0000 && a == 0xff000000)
388  avctx->pix_fmt = AV_PIX_FMT_RGBA;
389  /* give up */
390  else {
391  av_log(avctx, AV_LOG_ERROR, "Unknown pixel format "
392  "[bpp %d r 0x%x g 0x%x b 0x%x a 0x%x].\n", bpp, r, g, b, a);
393  return AVERROR_INVALIDDATA;
394  }
395  }
396 
397  /* Set any remaining post-proc that should happen before frame is ready. */
398  if (alpha_exponent)
399  ctx->postproc = DDS_ALPHA_EXP;
400  else if (normal_map)
401  ctx->postproc = DDS_NORMAL_MAP;
402  else if (ycocg_classic && !ctx->compressed)
403  ctx->postproc = DDS_RAW_YCOCG;
404 
405  /* ATI/NVidia variants sometimes add swizzling in bpp. */
406  switch (bpp) {
407  case MKTAG('A', '2', 'X', 'Y'):
408  ctx->postproc = DDS_SWIZZLE_A2XY;
409  break;
410  case MKTAG('x', 'G', 'B', 'R'):
411  ctx->postproc = DDS_SWIZZLE_XGBR;
412  break;
413  case MKTAG('x', 'R', 'B', 'G'):
414  ctx->postproc = DDS_SWIZZLE_XRBG;
415  break;
416  case MKTAG('R', 'B', 'x', 'G'):
417  ctx->postproc = DDS_SWIZZLE_RBXG;
418  break;
419  case MKTAG('R', 'G', 'x', 'B'):
420  ctx->postproc = DDS_SWIZZLE_RGXB;
421  break;
422  case MKTAG('R', 'x', 'B', 'G'):
423  ctx->postproc = DDS_SWIZZLE_RXBG;
424  break;
425  case MKTAG('x', 'G', 'x', 'R'):
426  ctx->postproc = DDS_SWIZZLE_XGXR;
427  break;
428  case MKTAG('A', '2', 'D', '5'):
429  ctx->postproc = DDS_NORMAL_MAP;
430  break;
431  }
432 
433  return 0;
434 }
435 
437  int slice, int thread_nb)
438 {
439  DDSContext *ctx = avctx->priv_data;
440  AVFrame *frame = arg;
441  const uint8_t *d = ctx->tex_data;
442  int w_block = avctx->coded_width / TEXTURE_BLOCK_W;
443  int h_block = avctx->coded_height / TEXTURE_BLOCK_H;
444  int x, y;
445  int start_slice, end_slice;
446  int base_blocks_per_slice = h_block / ctx->slice_count;
447  int remainder_blocks = h_block % ctx->slice_count;
448 
449  /* When the frame height (in blocks) doesn't divide evenly between the
450  * number of slices, spread the remaining blocks evenly between the first
451  * operations */
452  start_slice = slice * base_blocks_per_slice;
453  /* Add any extra blocks (one per slice) that have been added before this slice */
454  start_slice += FFMIN(slice, remainder_blocks);
455 
456  end_slice = start_slice + base_blocks_per_slice;
457  /* Add an extra block if there are still remainder blocks to be accounted for */
458  if (slice < remainder_blocks)
459  end_slice++;
460 
461  for (y = start_slice; y < end_slice; y++) {
462  uint8_t *p = frame->data[0] + y * frame->linesize[0] * TEXTURE_BLOCK_H;
463  int off = y * w_block;
464  for (x = 0; x < w_block; x++) {
465  ctx->tex_funct(p + x * 16, frame->linesize[0],
466  d + (off + x) * ctx->tex_ratio);
467  }
468  }
469 
470  return 0;
471 }
472 
473 static void do_swizzle(AVFrame *frame, int x, int y)
474 {
475  int i;
476  for (i = 0; i < frame->linesize[0] * frame->height; i += 4) {
477  uint8_t *src = frame->data[0] + i;
478  FFSWAP(uint8_t, src[x], src[y]);
479  }
480 }
481 
483 {
484  DDSContext *ctx = avctx->priv_data;
485  int i, x_off;
486 
487  switch (ctx->postproc) {
488  case DDS_ALPHA_EXP:
489  /* Alpha-exponential mode divides each channel by the maximum
490  * R, G or B value, and stores the multiplying factor in the
491  * alpha channel. */
492  av_log(avctx, AV_LOG_DEBUG, "Post-processing alpha exponent.\n");
493 
494  for (i = 0; i < frame->linesize[0] * frame->height; i += 4) {
495  uint8_t *src = frame->data[0] + i;
496  int r = src[0];
497  int g = src[1];
498  int b = src[2];
499  int a = src[3];
500 
501  src[0] = r * a / 255;
502  src[1] = g * a / 255;
503  src[2] = b * a / 255;
504  src[3] = 255;
505  }
506  break;
507  case DDS_NORMAL_MAP:
508  /* Normal maps work in the XYZ color space and they encode
509  * X in R or in A, depending on the texture type, Y in G and
510  * derive Z with a square root of the distance.
511  *
512  * http://www.realtimecollisiondetection.net/blog/?p=28 */
513  av_log(avctx, AV_LOG_DEBUG, "Post-processing normal map.\n");
514 
515  x_off = ctx->tex_ratio == 8 ? 0 : 3;
516  for (i = 0; i < frame->linesize[0] * frame->height; i += 4) {
517  uint8_t *src = frame->data[0] + i;
518  int x = src[x_off];
519  int y = src[1];
520  int z = 127;
521 
522  int d = (255 * 255 - x * x - y * y) / 2;
523  if (d > 0)
524  z = lrint(sqrtf(d));
525 
526  src[0] = x;
527  src[1] = y;
528  src[2] = z;
529  src[3] = 255;
530  }
531  break;
532  case DDS_RAW_YCOCG:
533  /* Data is Y-Co-Cg-A and not RGBA, but they are represented
534  * with the same masks in the DDPF header. */
535  av_log(avctx, AV_LOG_DEBUG, "Post-processing raw YCoCg.\n");
536 
537  for (i = 0; i < frame->linesize[0] * frame->height; i += 4) {
538  uint8_t *src = frame->data[0] + i;
539  int a = src[0];
540  int cg = src[1] - 128;
541  int co = src[2] - 128;
542  int y = src[3];
543 
544  src[0] = av_clip_uint8(y + co - cg);
545  src[1] = av_clip_uint8(y + cg);
546  src[2] = av_clip_uint8(y - co - cg);
547  src[3] = a;
548  }
549  break;
550  case DDS_SWAP_ALPHA:
551  /* Alpha and Luma are stored swapped. */
552  av_log(avctx, AV_LOG_DEBUG, "Post-processing swapped Luma/Alpha.\n");
553 
554  for (i = 0; i < frame->linesize[0] * frame->height; i += 2) {
555  uint8_t *src = frame->data[0] + i;
556  FFSWAP(uint8_t, src[0], src[1]);
557  }
558  break;
559  case DDS_SWIZZLE_A2XY:
560  /* Swap R and G, often used to restore a standard RGTC2. */
561  av_log(avctx, AV_LOG_DEBUG, "Post-processing A2XY swizzle.\n");
562  do_swizzle(frame, 0, 1);
563  break;
564  case DDS_SWIZZLE_RBXG:
565  /* Swap G and A, then B and new A (G). */
566  av_log(avctx, AV_LOG_DEBUG, "Post-processing RBXG swizzle.\n");
567  do_swizzle(frame, 1, 3);
568  do_swizzle(frame, 2, 3);
569  break;
570  case DDS_SWIZZLE_RGXB:
571  /* Swap B and A. */
572  av_log(avctx, AV_LOG_DEBUG, "Post-processing RGXB swizzle.\n");
573  do_swizzle(frame, 2, 3);
574  break;
575  case DDS_SWIZZLE_RXBG:
576  /* Swap G and A. */
577  av_log(avctx, AV_LOG_DEBUG, "Post-processing RXBG swizzle.\n");
578  do_swizzle(frame, 1, 3);
579  break;
580  case DDS_SWIZZLE_RXGB:
581  /* Swap R and A (misleading name). */
582  av_log(avctx, AV_LOG_DEBUG, "Post-processing RXGB swizzle.\n");
583  do_swizzle(frame, 0, 3);
584  break;
585  case DDS_SWIZZLE_XGBR:
586  /* Swap B and A, then R and new A (B). */
587  av_log(avctx, AV_LOG_DEBUG, "Post-processing XGBR swizzle.\n");
588  do_swizzle(frame, 2, 3);
589  do_swizzle(frame, 0, 3);
590  break;
591  case DDS_SWIZZLE_XGXR:
592  /* Swap G and A, then R and new A (G), then new R (G) and new G (A).
593  * This variant does not store any B component. */
594  av_log(avctx, AV_LOG_DEBUG, "Post-processing XGXR swizzle.\n");
595  do_swizzle(frame, 1, 3);
596  do_swizzle(frame, 0, 3);
597  do_swizzle(frame, 0, 1);
598  break;
599  case DDS_SWIZZLE_XRBG:
600  /* Swap G and A, then R and new A (G). */
601  av_log(avctx, AV_LOG_DEBUG, "Post-processing XRBG swizzle.\n");
602  do_swizzle(frame, 1, 3);
603  do_swizzle(frame, 0, 3);
604  break;
605  }
606 }
607 
608 static int dds_decode(AVCodecContext *avctx, void *data,
609  int *got_frame, AVPacket *avpkt)
610 {
611  DDSContext *ctx = avctx->priv_data;
612  GetByteContext *gbc = &ctx->gbc;
613  AVFrame *frame = data;
614  int mipmap;
615  int ret;
616 
617  ff_texturedsp_init(&ctx->texdsp);
618  bytestream2_init(gbc, avpkt->data, avpkt->size);
619 
620  if (bytestream2_get_bytes_left(gbc) < 128) {
621  av_log(avctx, AV_LOG_ERROR, "Frame is too small (%d).\n",
623  return AVERROR_INVALIDDATA;
624  }
625 
626  if (bytestream2_get_le32(gbc) != MKTAG('D', 'D', 'S', ' ') ||
627  bytestream2_get_le32(gbc) != 124) { // header size
628  av_log(avctx, AV_LOG_ERROR, "Invalid DDS header.\n");
629  return AVERROR_INVALIDDATA;
630  }
631 
632  bytestream2_skip(gbc, 4); // flags
633 
634  avctx->height = bytestream2_get_le32(gbc);
635  avctx->width = bytestream2_get_le32(gbc);
636  ret = av_image_check_size(avctx->width, avctx->height, 0, avctx);
637  if (ret < 0) {
638  av_log(avctx, AV_LOG_ERROR, "Invalid image size %dx%d.\n",
639  avctx->width, avctx->height);
640  return ret;
641  }
642 
643  /* Since codec is based on 4x4 blocks, size is aligned to 4. */
644  avctx->coded_width = FFALIGN(avctx->width, TEXTURE_BLOCK_W);
645  avctx->coded_height = FFALIGN(avctx->height, TEXTURE_BLOCK_H);
646 
647  bytestream2_skip(gbc, 4); // pitch
648  bytestream2_skip(gbc, 4); // depth
649  mipmap = bytestream2_get_le32(gbc);
650  if (mipmap != 0)
651  av_log(avctx, AV_LOG_VERBOSE, "Found %d mipmaps (ignored).\n", mipmap);
652 
653  /* Extract pixel format information, considering additional elements
654  * in reserved1 and reserved2. */
655  ret = parse_pixel_format(avctx);
656  if (ret < 0)
657  return ret;
658 
659  ret = ff_get_buffer(avctx, frame, 0);
660  if (ret < 0)
661  return ret;
662 
663  if (ctx->compressed) {
664  int size = (avctx->coded_height / TEXTURE_BLOCK_H) *
665  (avctx->coded_width / TEXTURE_BLOCK_W) * ctx->tex_ratio;
666  ctx->slice_count = av_clip(avctx->thread_count, 1,
667  avctx->coded_height / TEXTURE_BLOCK_H);
668 
669  if (bytestream2_get_bytes_left(gbc) < size) {
670  av_log(avctx, AV_LOG_ERROR,
671  "Compressed Buffer is too small (%d < %d).\n",
672  bytestream2_get_bytes_left(gbc), size);
673  return AVERROR_INVALIDDATA;
674  }
675 
676  /* Use the decompress function on the texture, one block per thread. */
677  ctx->tex_data = gbc->buffer;
678  avctx->execute2(avctx, decompress_texture_thread, frame, NULL, ctx->slice_count);
679  } else if (!ctx->paletted && ctx->bpp == 4 && avctx->pix_fmt == AV_PIX_FMT_PAL8) {
680  uint8_t *dst = frame->data[0];
681  int x, y, i;
682 
683  /* Use the first 64 bytes as palette, then copy the rest. */
684  bytestream2_get_buffer(gbc, frame->data[1], 16 * 4);
685  for (i = 0; i < 16; i++) {
686  AV_WN32(frame->data[1] + i*4,
687  (frame->data[1][2+i*4]<<0)+
688  (frame->data[1][1+i*4]<<8)+
689  (frame->data[1][0+i*4]<<16)+
690  ((unsigned)frame->data[1][3+i*4]<<24)
691  );
692  }
693  frame->palette_has_changed = 1;
694 
695  if (bytestream2_get_bytes_left(gbc) < frame->height * frame->width / 2) {
696  av_log(avctx, AV_LOG_ERROR, "Buffer is too small (%d < %d).\n",
697  bytestream2_get_bytes_left(gbc), frame->height * frame->width / 2);
698  return AVERROR_INVALIDDATA;
699  }
700 
701  for (y = 0; y < frame->height; y++) {
702  for (x = 0; x < frame->width; x += 2) {
703  uint8_t val = bytestream2_get_byte(gbc);
704  dst[x ] = val & 0xF;
705  dst[x + 1] = val >> 4;
706  }
707  dst += frame->linesize[0];
708  }
709  } else {
710  int linesize = av_image_get_linesize(avctx->pix_fmt, frame->width, 0);
711 
712  if (ctx->paletted) {
713  int i;
714  /* Use the first 1024 bytes as palette, then copy the rest. */
715  bytestream2_get_buffer(gbc, frame->data[1], 256 * 4);
716  for (i = 0; i < 256; i++)
717  AV_WN32(frame->data[1] + i*4,
718  (frame->data[1][2+i*4]<<0)+
719  (frame->data[1][1+i*4]<<8)+
720  (frame->data[1][0+i*4]<<16)+
721  ((unsigned)frame->data[1][3+i*4]<<24)
722  );
723 
724  frame->palette_has_changed = 1;
725  }
726 
727  if (bytestream2_get_bytes_left(gbc) < frame->height * linesize) {
728  av_log(avctx, AV_LOG_ERROR, "Buffer is too small (%d < %d).\n",
729  bytestream2_get_bytes_left(gbc), frame->height * linesize);
730  return AVERROR_INVALIDDATA;
731  }
732 
733  av_image_copy_plane(frame->data[0], frame->linesize[0],
734  gbc->buffer, linesize,
735  linesize, frame->height);
736  }
737 
738  /* Run any post processing here if needed. */
739  if (ctx->postproc != DDS_NONE)
740  run_postproc(avctx, frame);
741 
742  /* Frame is ready to be output. */
743  frame->pict_type = AV_PICTURE_TYPE_I;
744  frame->key_frame = 1;
745  *got_frame = 1;
746 
747  return avpkt->size;
748 }
749 
751  .name = "dds",
752  .long_name = NULL_IF_CONFIG_SMALL("DirectDraw Surface image decoder"),
753  .type = AVMEDIA_TYPE_VIDEO,
754  .id = AV_CODEC_ID_DDS,
755  .decode = dds_decode,
756  .priv_data_size = sizeof(DDSContext),
758  .caps_internal = FF_CODEC_CAP_INIT_THREADSAFE
759 };
packed YUV 4:2:2, 16bpp, Cb Y0 Cr Y1
Definition: pixfmt.h:77
#define NULL
Definition: coverity.c:32
const char const char void * val
Definition: avisynth_c.h:771
int av_image_get_linesize(enum AVPixelFormat pix_fmt, int width, int plane)
Compute the size of an image line with format pix_fmt and width width for the plane plane...
Definition: imgutils.c:76
uint32_t fourcc
Definition: hwcontext_qsv.c:90
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:59
int compressed
Definition: dds.c:103
This structure describes decoded (raw) audio or video data.
Definition: frame.h:201
int(* tex_funct)(uint8_t *dst, ptrdiff_t stride, const uint8_t *block)
Definition: dds.c:113
ptrdiff_t const GLvoid * data
Definition: opengl_enc.c:101
8 bits gray, 8 bits alpha
Definition: pixfmt.h:139
int coded_width
Bitstream width / height, may be different from width/height e.g.
Definition: avcodec.h:1689
misc image utilities
#define AV_LOG_WARNING
Something somehow does not look correct.
Definition: log.h:182
const char * g
Definition: vf_curves.c:112
Texture block (4x4) module.
packed RGB 5:5:5, 16bpp, (msb)1X 5R 5G 5B(lsb), little-endian, X=unused/undefined ...
Definition: pixfmt.h:104
int size
Definition: avcodec.h:1415
const char * b
Definition: vf_curves.c:113
#define AV_PIX_FMT_BGRA64
Definition: pixfmt.h:363
enum AVPixelFormat pix_fmt
Pixel format, see AV_PIX_FMT_xxx.
Definition: avcodec.h:1711
static av_always_inline void bytestream2_init(GetByteContext *g, const uint8_t *buf, int buf_size)
Definition: bytestream.h:133
int slice_count
Definition: dds.c:110
enum DDSPostProc postproc
Definition: dds.c:106
int tex_ratio
Definition: dds.c:109
static int parse_pixel_format(AVCodecContext *avctx)
Definition: dds.c:116
#define src
Definition: vp8dsp.c:254
AVCodec.
Definition: avcodec.h:3365
order of coefficients is actually GBR, also IEC 61966-2-1 (sRGB)
Definition: pixfmt.h:474
TextureDSPContext texdsp
Definition: dds.c:100
packed RGB 5:6:5, 16bpp, (msb) 5R 6G 5B(lsb), little-endian
Definition: pixfmt.h:102
static int16_t block[64]
Definition: dct.c:115
#define FF_CODEC_CAP_INIT_THREADSAFE
The codec does not modify any global variables in the init function, allowing to call the init functi...
Definition: internal.h:40
uint8_t
#define DDPF_NORMALMAP
Definition: dds.c:42
packed RGB 8:8:8, 32bpp, RGBXRGBX... X=unused/undefined
Definition: pixfmt.h:234
8 bits with AV_PIX_FMT_RGB32 palette
Definition: pixfmt.h:73
Definition: dds.c:45
Multithreading support functions.
static AVFrame * frame
#define TEXTURE_BLOCK_H
Definition: texturedsp.h:43
int(* dxt5y_block)(uint8_t *dst, ptrdiff_t stride, const uint8_t *block)
Definition: texturedsp.h:52
uint8_t * data
Definition: avcodec.h:1414
const uint8_t * buffer
Definition: bytestream.h:34
static int flags
Definition: log.c:57
#define AV_LOG_VERBOSE
Detailed information.
Definition: log.h:192
ptrdiff_t size
Definition: opengl_enc.c:101
#define DDPF_FOURCC
Definition: dds.c:40
#define FFALIGN(x, a)
Definition: macros.h:48
#define av_log(a,...)
DDSPostProc
Definition: dds.c:44
int(* dxt1a_block)(uint8_t *dst, ptrdiff_t stride, const uint8_t *block)
Definition: texturedsp.h:47
int width
Definition: frame.h:259
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:176
AVCodec ff_dds_decoder
Definition: dds.c:750
int(* dxt4_block)(uint8_t *dst, ptrdiff_t stride, const uint8_t *block)
Definition: texturedsp.h:50
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:186
packed BGRA 8:8:8:8, 32bpp, BGRABGRA...
Definition: pixfmt.h:91
const char * r
Definition: vf_curves.c:111
static av_always_inline unsigned int bytestream2_get_buffer(GetByteContext *g, uint8_t *dst, unsigned int size)
Definition: bytestream.h:263
#define AV_LOG_DEBUG
Stuff which is only useful for libav* developers.
Definition: log.h:197
GetByteContext gbc
Definition: dds.c:101
Definition: dds.c:99
#define av_fourcc2str(fourcc)
Definition: avutil.h:348
static av_always_inline unsigned int bytestream2_get_bytes_left(GetByteContext *g)
Definition: bytestream.h:154
const char * arg
Definition: jacosubdec.c:66
const char * name
Name of the codec implementation.
Definition: avcodec.h:3372
int(* dxt5_block)(uint8_t *dst, ptrdiff_t stride, const uint8_t *block)
Definition: texturedsp.h:51
packed RGBA 8:8:8:8, 32bpp, RGBARGBA...
Definition: pixfmt.h:89
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:282
av_cold void ff_texturedsp_init(TextureDSPContext *c)
Definition: texturedsp.c:637
enum AVPictureType pict_type
Picture type of the frame.
Definition: frame.h:284
#define FFMIN(a, b)
Definition: common.h:96
int(* rgtc1s_block)(uint8_t *dst, ptrdiff_t stride, const uint8_t *block)
Definition: texturedsp.h:54
int paletted
Definition: dds.c:104
int width
picture width / height.
Definition: avcodec.h:1674
AVFormatContext * ctx
Definition: movenc.c:48
packed RGB 8:8:8, 24bpp, BGRBGR...
Definition: pixfmt.h:65
int thread_count
thread count is used to decide how many independent tasks should be passed to execute() ...
Definition: avcodec.h:2753
int bpp
Definition: dds.c:105
#define AV_CODEC_CAP_SLICE_THREADS
Codec supports slice-based (or partition-based) multithreading.
Definition: avcodec.h:1016
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:1502
int(* dxn3dc_block)(uint8_t *dst, ptrdiff_t stride, const uint8_t *block)
Definition: texturedsp.h:60
packed YUV 4:2:2, 16bpp, Y0 Cb Y1 Cr
Definition: pixfmt.h:63
static void do_swizzle(AVFrame *frame, int x, int y)
Definition: dds.c:473
int ff_get_buffer(AVCodecContext *avctx, AVFrame *frame, int flags)
Get a buffer for a frame.
Definition: decode.c:1886
Replacements for frequently missing libm functions.
int coded_height
Definition: avcodec.h:1689
enum AVColorSpace colorspace
YUV colorspace type.
Definition: avcodec.h:2125
int palette_has_changed
Tell user application that palette has changed from previous frame.
Definition: frame.h:358
packed BGR 8:8:8, 32bpp, BGRXBGRX... X=unused/undefined
Definition: pixfmt.h:236
int(* rgtc2u_block)(uint8_t *dst, ptrdiff_t stride, const uint8_t *block)
Definition: texturedsp.h:59
int(* dxt3_block)(uint8_t *dst, ptrdiff_t stride, const uint8_t *block)
Definition: texturedsp.h:49
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
Definition: frame.h:215
Y , 1bpp, 0 is black, 1 is white, in each byte pixels are ordered from the msb to the lsb...
Definition: pixfmt.h:72
int
Y , 8bpp.
Definition: pixfmt.h:70
common internal api header.
#define AV_WN32(p, v)
Definition: intreadwrite.h:376
void * priv_data
Definition: avcodec.h:1529
int(* execute2)(struct AVCodecContext *c, int(*func)(struct AVCodecContext *c2, void *arg, int jobnr, int threadnr), void *arg2, int *ret, int count)
The codec may call this to execute several independent things.
Definition: avcodec.h:2813
int(* rgtc2s_block)(uint8_t *dst, ptrdiff_t stride, const uint8_t *block)
Definition: texturedsp.h:58
Y , 16bpp, little-endian.
Definition: pixfmt.h:94
int key_frame
1 -> keyframe, 0-> not
Definition: frame.h:279
static int decompress_texture_thread(AVCodecContext *avctx, void *arg, int slice, int thread_nb)
Definition: dds.c:436
#define lrint
Definition: tablegen.h:53
#define DDPF_PALETTE
Definition: dds.c:41
int height
Definition: frame.h:259
static int array[MAX_W *MAX_W]
Definition: jpeg2000dwt.c:106
#define FFSWAP(type, a, b)
Definition: common.h:99
void av_image_copy_plane(uint8_t *dst, int dst_linesize, const uint8_t *src, int src_linesize, int bytewidth, int height)
Copy image plane from src to dst.
Definition: imgutils.c:338
#define stride
#define MKTAG(a, b, c, d)
Definition: common.h:366
DDSDXGIFormat
Definition: dds.c:60
static void run_postproc(AVCodecContext *avctx, AVFrame *frame)
Definition: dds.c:482
#define TEXTURE_BLOCK_W
Definition: texturedsp.h:42
const uint8_t * tex_data
Definition: dds.c:108
This structure stores compressed data.
Definition: avcodec.h:1391
int(* dxt5ys_block)(uint8_t *dst, ptrdiff_t stride, const uint8_t *block)
Definition: texturedsp.h:53
#define AV_CODEC_CAP_DR1
Codec uses get_buffer() for allocating buffers and supports custom allocators.
Definition: avcodec.h:956
int(* dxt2_block)(uint8_t *dst, ptrdiff_t stride, const uint8_t *block)
Definition: texturedsp.h:48
int(* rgtc1u_block)(uint8_t *dst, ptrdiff_t stride, const uint8_t *block)
Definition: texturedsp.h:55
static int dds_decode(AVCodecContext *avctx, void *data, int *got_frame, AVPacket *avpkt)
Definition: dds.c:608