Libav
indeo3.c
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1 /*
2  * Indeo Video v3 compatible decoder
3  * Copyright (c) 2009 - 2011 Maxim Poliakovski
4  *
5  * This file is part of Libav.
6  *
7  * Libav 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  * Libav 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 Libav; if not, write to the Free Software
19  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20  */
21 
32 #include "libavutil/imgutils.h"
33 #include "libavutil/intreadwrite.h"
34 #include "avcodec.h"
35 #include "bytestream.h"
36 #include "get_bits.h"
37 #include "hpeldsp.h"
38 #include "internal.h"
39 
40 #include "indeo3data.h"
41 
42 /* RLE opcodes. */
43 enum {
44  RLE_ESC_F9 = 249,
45  RLE_ESC_FA = 250,
46  RLE_ESC_FB = 251,
47  RLE_ESC_FC = 252,
48  RLE_ESC_FD = 253,
49  RLE_ESC_FE = 254,
50  RLE_ESC_FF = 255
51 };
52 
53 
54 /* Some constants for parsing frame bitstream flags. */
55 #define BS_8BIT_PEL (1 << 1)
56 #define BS_KEYFRAME (1 << 2)
57 #define BS_MV_Y_HALF (1 << 4)
58 #define BS_MV_X_HALF (1 << 5)
59 #define BS_NONREF (1 << 8)
60 #define BS_BUFFER 9
61 
62 
63 typedef struct Plane {
66  uint32_t width;
67  uint32_t height;
68  uint32_t pitch;
69 } Plane;
70 
71 #define CELL_STACK_MAX 20
72 
73 typedef struct Cell {
74  int16_t xpos;
75  int16_t ypos;
76  int16_t width;
77  int16_t height;
79  const int8_t *mv_ptr;
80 } Cell;
81 
82 typedef struct Indeo3DecodeContext {
85 
88  int skip_bits;
91  const int8_t *mc_vectors;
92  unsigned num_vectors;
93 
94  int16_t width, height;
95  uint32_t frame_num;
96  uint32_t data_size;
97  uint16_t frame_flags;
109 
110 
111 static uint8_t requant_tab[8][128];
112 
113 /*
114  * Build the static requantization table.
115  * This table is used to remap pixel values according to a specific
116  * quant index and thus avoid overflows while adding deltas.
117  */
118 static av_cold void build_requant_tab(void)
119 {
120  static int8_t offsets[8] = { 1, 1, 2, -3, -3, 3, 4, 4 };
121  static int8_t deltas [8] = { 0, 1, 0, 4, 4, 1, 0, 1 };
122 
123  int i, j, step;
124 
125  for (i = 0; i < 8; i++) {
126  step = i + 2;
127  for (j = 0; j < 128; j++)
128  requant_tab[i][j] = (j + offsets[i]) / step * step + deltas[i];
129  }
130 
131  /* some last elements calculated above will have values >= 128 */
132  /* pixel values shall never exceed 127 so set them to non-overflowing values */
133  /* according with the quantization step of the respective section */
134  requant_tab[0][127] = 126;
135  requant_tab[1][119] = 118;
136  requant_tab[1][120] = 118;
137  requant_tab[2][126] = 124;
138  requant_tab[2][127] = 124;
139  requant_tab[6][124] = 120;
140  requant_tab[6][125] = 120;
141  requant_tab[6][126] = 120;
142  requant_tab[6][127] = 120;
143 
144  /* Patch for compatibility with the Intel's binary decoders */
145  requant_tab[1][7] = 10;
146  requant_tab[4][8] = 10;
147 }
148 
149 
151  AVCodecContext *avctx)
152 {
153  int p, luma_width, luma_height, chroma_width, chroma_height;
154  int luma_pitch, chroma_pitch, luma_size, chroma_size;
155 
156  luma_width = ctx->width;
157  luma_height = ctx->height;
158 
159  if (luma_width < 16 || luma_width > 640 ||
160  luma_height < 16 || luma_height > 480 ||
161  luma_width & 3 || luma_height & 3) {
162  av_log(avctx, AV_LOG_ERROR, "Invalid picture dimensions: %d x %d!\n",
163  luma_width, luma_height);
164  return AVERROR_INVALIDDATA;
165  }
166 
167  chroma_width = FFALIGN(luma_width >> 2, 4);
168  chroma_height = FFALIGN(luma_height >> 2, 4);
169 
170  luma_pitch = FFALIGN(luma_width, 16);
171  chroma_pitch = FFALIGN(chroma_width, 16);
172 
173  /* Calculate size of the luminance plane. */
174  /* Add one line more for INTRA prediction. */
175  luma_size = luma_pitch * (luma_height + 1);
176 
177  /* Calculate size of a chrominance planes. */
178  /* Add one line more for INTRA prediction. */
179  chroma_size = chroma_pitch * (chroma_height + 1);
180 
181  /* allocate frame buffers */
182  for (p = 0; p < 3; p++) {
183  ctx->planes[p].pitch = !p ? luma_pitch : chroma_pitch;
184  ctx->planes[p].width = !p ? luma_width : chroma_width;
185  ctx->planes[p].height = !p ? luma_height : chroma_height;
186 
187  ctx->planes[p].buffers[0] = av_malloc(!p ? luma_size : chroma_size);
188  ctx->planes[p].buffers[1] = av_malloc(!p ? luma_size : chroma_size);
189 
190  /* fill the INTRA prediction lines with the middle pixel value = 64 */
191  memset(ctx->planes[p].buffers[0], 0x40, ctx->planes[p].pitch);
192  memset(ctx->planes[p].buffers[1], 0x40, ctx->planes[p].pitch);
193 
194  /* set buffer pointers = buf_ptr + pitch and thus skip the INTRA prediction line */
195  ctx->planes[p].pixels[0] = ctx->planes[p].buffers[0] + ctx->planes[p].pitch;
196  ctx->planes[p].pixels[1] = ctx->planes[p].buffers[1] + ctx->planes[p].pitch;
197  memset(ctx->planes[p].pixels[0], 0, ctx->planes[p].pitch * ctx->planes[p].height);
198  memset(ctx->planes[p].pixels[1], 0, ctx->planes[p].pitch * ctx->planes[p].height);
199  }
200 
201  return 0;
202 }
203 
204 
206 {
207  int p;
208 
209  for (p = 0; p < 3; p++) {
210  av_freep(&ctx->planes[p].buffers[0]);
211  av_freep(&ctx->planes[p].buffers[1]);
212  ctx->planes[p].pixels[0] = ctx->planes[p].pixels[1] = 0;
213  }
214 }
215 
216 
225 static int copy_cell(Indeo3DecodeContext *ctx, Plane *plane, Cell *cell)
226 {
227  int h, w, mv_x, mv_y, offset, offset_dst;
228  uint8_t *src, *dst;
229 
230  /* setup output and reference pointers */
231  offset_dst = (cell->ypos << 2) * plane->pitch + (cell->xpos << 2);
232  dst = plane->pixels[ctx->buf_sel] + offset_dst;
233  mv_y = cell->mv_ptr[0];
234  mv_x = cell->mv_ptr[1];
235 
236  /* -1 because there is an extra line on top for prediction */
237  if ((cell->ypos << 2) + mv_y < -1 || (cell->xpos << 2) + mv_x < 0 ||
238  ((cell->ypos + cell->height) << 2) + mv_y > plane->height ||
239  ((cell->xpos + cell->width) << 2) + mv_x > plane->width) {
240  av_log(ctx->avctx, AV_LOG_ERROR,
241  "Motion vectors point out of the frame.\n");
242  return AVERROR_INVALIDDATA;
243  }
244 
245  offset = offset_dst + mv_y * plane->pitch + mv_x;
246  src = plane->pixels[ctx->buf_sel ^ 1] + offset;
247 
248  h = cell->height << 2;
249 
250  for (w = cell->width; w > 0;) {
251  /* copy using 16xH blocks */
252  if (!((cell->xpos << 2) & 15) && w >= 4) {
253  for (; w >= 4; src += 16, dst += 16, w -= 4)
254  ctx->hdsp.put_pixels_tab[0][0](dst, src, plane->pitch, h);
255  }
256 
257  /* copy using 8xH blocks */
258  if (!((cell->xpos << 2) & 7) && w >= 2) {
259  ctx->hdsp.put_pixels_tab[1][0](dst, src, plane->pitch, h);
260  w -= 2;
261  src += 8;
262  dst += 8;
263  } else if (w >= 1) {
264  ctx->hdsp.put_pixels_tab[2][0](dst, src, plane->pitch, h);
265  w--;
266  src += 4;
267  dst += 4;
268  }
269  }
270 
271  return 0;
272 }
273 
274 
275 /* Average 4/8 pixels at once without rounding using SWAR */
276 #define AVG_32(dst, src, ref) \
277  AV_WN32A(dst, ((AV_RN32(src) + AV_RN32(ref)) >> 1) & 0x7F7F7F7FUL)
278 
279 #define AVG_64(dst, src, ref) \
280  AV_WN64A(dst, ((AV_RN64(src) + AV_RN64(ref)) >> 1) & 0x7F7F7F7F7F7F7F7FULL)
281 
282 
283 /*
284  * Replicate each even pixel as follows:
285  * ABCDEFGH -> AACCEEGG
286  */
287 static inline uint64_t replicate64(uint64_t a) {
288 #if HAVE_BIGENDIAN
289  a &= 0xFF00FF00FF00FF00ULL;
290  a |= a >> 8;
291 #else
292  a &= 0x00FF00FF00FF00FFULL;
293  a |= a << 8;
294 #endif
295  return a;
296 }
297 
298 static inline uint32_t replicate32(uint32_t a) {
299 #if HAVE_BIGENDIAN
300  a &= 0xFF00FF00UL;
301  a |= a >> 8;
302 #else
303  a &= 0x00FF00FFUL;
304  a |= a << 8;
305 #endif
306  return a;
307 }
308 
309 
310 /* Fill n lines with 64bit pixel value pix */
311 static inline void fill_64(uint8_t *dst, const uint64_t pix, int32_t n,
312  int32_t row_offset)
313 {
314  for (; n > 0; dst += row_offset, n--)
315  AV_WN64A(dst, pix);
316 }
317 
318 
319 /* Error codes for cell decoding. */
320 enum {
327 };
328 
329 
330 #define BUFFER_PRECHECK \
331 if (*data_ptr >= last_ptr) \
332  return IV3_OUT_OF_DATA; \
333 
334 #define RLE_BLOCK_COPY \
335  if (cell->mv_ptr || !skip_flag) \
336  ctx->hdsp.put_pixels_tab[2][0](dst, ref, row_offset, 4 << v_zoom)
337 
338 #define RLE_BLOCK_COPY_8 \
339  pix64 = AV_RN64(ref);\
340  if (is_first_row) {/* special prediction case: top line of a cell */\
341  pix64 = replicate64(pix64);\
342  fill_64(dst + row_offset, pix64, 7, row_offset);\
343  AVG_64(dst, ref, dst + row_offset);\
344  } else \
345  fill_64(dst, pix64, 8, row_offset)
346 
347 #define RLE_LINES_COPY \
348  ctx->hdsp.put_pixels_tab[2][0](dst, ref, row_offset, num_lines << v_zoom)
349 
350 #define RLE_LINES_COPY_M10 \
351  pix64 = AV_RN64(ref);\
352  if (is_top_of_cell) {\
353  pix64 = replicate64(pix64);\
354  fill_64(dst + row_offset, pix64, (num_lines << 1) - 1, row_offset);\
355  AVG_64(dst, ref, dst + row_offset);\
356  } else \
357  fill_64(dst, pix64, num_lines << 1, row_offset)
358 
359 #define APPLY_DELTA_4 \
360  AV_WN16A(dst + line_offset ,\
361  (AV_RN16(ref ) + delta_tab->deltas[dyad1]) & 0x7F7F);\
362  AV_WN16A(dst + line_offset + 2,\
363  (AV_RN16(ref + 2) + delta_tab->deltas[dyad2]) & 0x7F7F);\
364  if (mode >= 3) {\
365  if (is_top_of_cell && !cell->ypos) {\
366  AV_COPY32U(dst, dst + row_offset);\
367  } else {\
368  AVG_32(dst, ref, dst + row_offset);\
369  }\
370  }
371 
372 #define APPLY_DELTA_8 \
373  /* apply two 32-bit VQ deltas to next even line */\
374  if (is_top_of_cell) { \
375  AV_WN32A(dst + row_offset , \
376  (replicate32(AV_RN32(ref )) + delta_tab->deltas_m10[dyad1]) & 0x7F7F7F7F);\
377  AV_WN32A(dst + row_offset + 4, \
378  (replicate32(AV_RN32(ref + 4)) + delta_tab->deltas_m10[dyad2]) & 0x7F7F7F7F);\
379  } else { \
380  AV_WN32A(dst + row_offset , \
381  (AV_RN32(ref ) + delta_tab->deltas_m10[dyad1]) & 0x7F7F7F7F);\
382  AV_WN32A(dst + row_offset + 4, \
383  (AV_RN32(ref + 4) + delta_tab->deltas_m10[dyad2]) & 0x7F7F7F7F);\
384  } \
385  /* odd lines are not coded but rather interpolated/replicated */\
386  /* first line of the cell on the top of image? - replicate */\
387  /* otherwise - interpolate */\
388  if (is_top_of_cell && !cell->ypos) {\
389  AV_COPY64U(dst, dst + row_offset);\
390  } else \
391  AVG_64(dst, ref, dst + row_offset);
392 
393 
394 #define APPLY_DELTA_1011_INTER \
395  if (mode == 10) { \
396  AV_WN32A(dst , \
397  (AV_RN32(dst ) + delta_tab->deltas_m10[dyad1]) & 0x7F7F7F7F);\
398  AV_WN32A(dst + 4 , \
399  (AV_RN32(dst + 4 ) + delta_tab->deltas_m10[dyad2]) & 0x7F7F7F7F);\
400  AV_WN32A(dst + row_offset , \
401  (AV_RN32(dst + row_offset ) + delta_tab->deltas_m10[dyad1]) & 0x7F7F7F7F);\
402  AV_WN32A(dst + row_offset + 4, \
403  (AV_RN32(dst + row_offset + 4) + delta_tab->deltas_m10[dyad2]) & 0x7F7F7F7F);\
404  } else { \
405  AV_WN16A(dst , \
406  (AV_RN16(dst ) + delta_tab->deltas[dyad1]) & 0x7F7F);\
407  AV_WN16A(dst + 2 , \
408  (AV_RN16(dst + 2 ) + delta_tab->deltas[dyad2]) & 0x7F7F);\
409  AV_WN16A(dst + row_offset , \
410  (AV_RN16(dst + row_offset ) + delta_tab->deltas[dyad1]) & 0x7F7F);\
411  AV_WN16A(dst + row_offset + 2, \
412  (AV_RN16(dst + row_offset + 2) + delta_tab->deltas[dyad2]) & 0x7F7F);\
413  }
414 
415 
417  uint8_t *block, uint8_t *ref_block,
418  int pitch, int h_zoom, int v_zoom, int mode,
419  const vqEntry *delta[2], int swap_quads[2],
420  const uint8_t **data_ptr, const uint8_t *last_ptr)
421 {
422  int x, y, line, num_lines;
423  int rle_blocks = 0;
424  uint8_t code, *dst, *ref;
425  const vqEntry *delta_tab;
426  unsigned int dyad1, dyad2;
427  uint64_t pix64;
428  int skip_flag = 0, is_top_of_cell, is_first_row = 1;
429  int row_offset, blk_row_offset, line_offset;
430 
431  row_offset = pitch;
432  blk_row_offset = (row_offset << (2 + v_zoom)) - (cell->width << 2);
433  line_offset = v_zoom ? row_offset : 0;
434 
435  if (cell->height & v_zoom || cell->width & h_zoom)
436  return IV3_BAD_DATA;
437 
438  for (y = 0; y < cell->height; is_first_row = 0, y += 1 + v_zoom) {
439  for (x = 0; x < cell->width; x += 1 + h_zoom) {
440  ref = ref_block;
441  dst = block;
442 
443  if (rle_blocks > 0) {
444  if (mode <= 4) {
446  } else if (mode == 10 && !cell->mv_ptr) {
448  }
449  rle_blocks--;
450  } else {
451  for (line = 0; line < 4;) {
452  num_lines = 1;
453  is_top_of_cell = is_first_row && !line;
454 
455  /* select primary VQ table for odd, secondary for even lines */
456  if (mode <= 4)
457  delta_tab = delta[line & 1];
458  else
459  delta_tab = delta[1];
461  code = bytestream_get_byte(data_ptr);
462  if (code < 248) {
463  if (code < delta_tab->num_dyads) {
465  dyad1 = bytestream_get_byte(data_ptr);
466  dyad2 = code;
467  if (dyad1 >= delta_tab->num_dyads || dyad1 >= 248)
468  return IV3_BAD_DATA;
469  } else {
470  /* process QUADS */
471  code -= delta_tab->num_dyads;
472  dyad1 = code / delta_tab->quad_exp;
473  dyad2 = code % delta_tab->quad_exp;
474  if (swap_quads[line & 1])
475  FFSWAP(unsigned int, dyad1, dyad2);
476  }
477  if (mode <= 4) {
479  } else if (mode == 10 && !cell->mv_ptr) {
481  } else {
483  }
484  } else {
485  /* process RLE codes */
486  switch (code) {
487  case RLE_ESC_FC:
488  skip_flag = 0;
489  rle_blocks = 1;
490  code = 253;
491  /* FALLTHROUGH */
492  case RLE_ESC_FF:
493  case RLE_ESC_FE:
494  case RLE_ESC_FD:
495  num_lines = 257 - code - line;
496  if (num_lines <= 0)
497  return IV3_BAD_RLE;
498  if (mode <= 4) {
500  } else if (mode == 10 && !cell->mv_ptr) {
502  }
503  break;
504  case RLE_ESC_FB:
506  code = bytestream_get_byte(data_ptr);
507  rle_blocks = (code & 0x1F) - 1; /* set block counter */
508  if (code >= 64 || rle_blocks < 0)
509  return IV3_BAD_COUNTER;
510  skip_flag = code & 0x20;
511  num_lines = 4 - line; /* enforce next block processing */
512  if (mode >= 10 || (cell->mv_ptr || !skip_flag)) {
513  if (mode <= 4) {
515  } else if (mode == 10 && !cell->mv_ptr) {
517  }
518  }
519  break;
520  case RLE_ESC_F9:
521  skip_flag = 1;
522  rle_blocks = 1;
523  /* FALLTHROUGH */
524  case RLE_ESC_FA:
525  if (line)
526  return IV3_BAD_RLE;
527  num_lines = 4; /* enforce next block processing */
528  if (cell->mv_ptr) {
529  if (mode <= 4) {
531  } else if (mode == 10 && !cell->mv_ptr) {
533  }
534  }
535  break;
536  default:
537  return IV3_UNSUPPORTED;
538  }
539  }
540 
541  line += num_lines;
542  ref += row_offset * (num_lines << v_zoom);
543  dst += row_offset * (num_lines << v_zoom);
544  }
545  }
546 
547  /* move to next horizontal block */
548  block += 4 << h_zoom;
549  ref_block += 4 << h_zoom;
550  }
551 
552  /* move to next line of blocks */
553  ref_block += blk_row_offset;
554  block += blk_row_offset;
555  }
556  return IV3_NOERR;
557 }
558 
559 
574  Plane *plane, Cell *cell, const uint8_t *data_ptr,
575  const uint8_t *last_ptr)
576 {
577  int x, mv_x, mv_y, mode, vq_index, prim_indx, second_indx;
578  int zoom_fac;
579  int offset, error = 0, swap_quads[2];
580  uint8_t code, *block, *ref_block = 0;
581  const vqEntry *delta[2];
582  const uint8_t *data_start = data_ptr;
583 
584  /* get coding mode and VQ table index from the VQ descriptor byte */
585  code = *data_ptr++;
586  mode = code >> 4;
587  vq_index = code & 0xF;
588 
589  /* setup output and reference pointers */
590  offset = (cell->ypos << 2) * plane->pitch + (cell->xpos << 2);
591  block = plane->pixels[ctx->buf_sel] + offset;
592  if (!cell->mv_ptr) {
593  /* use previous line as reference for INTRA cells */
594  ref_block = block - plane->pitch;
595  } else if (mode >= 10) {
596  /* for mode 10 and 11 INTER first copy the predicted cell into the current one */
597  /* so we don't need to do data copying for each RLE code later */
598  int ret = copy_cell(ctx, plane, cell);
599  if (ret < 0)
600  return ret;
601  } else {
602  /* set the pointer to the reference pixels for modes 0-4 INTER */
603  mv_y = cell->mv_ptr[0];
604  mv_x = cell->mv_ptr[1];
605 
606  /* -1 because there is an extra line on top for prediction */
607  if ((cell->ypos << 2) + mv_y < -1 || (cell->xpos << 2) + mv_x < 0 ||
608  ((cell->ypos + cell->height) << 2) + mv_y > plane->height ||
609  ((cell->xpos + cell->width) << 2) + mv_x > plane->width) {
610  av_log(ctx->avctx, AV_LOG_ERROR,
611  "Motion vectors point out of the frame.\n");
612  return AVERROR_INVALIDDATA;
613  }
614 
615  offset += mv_y * plane->pitch + mv_x;
616  ref_block = plane->pixels[ctx->buf_sel ^ 1] + offset;
617  }
618 
619  /* select VQ tables as follows: */
620  /* modes 0 and 3 use only the primary table for all lines in a block */
621  /* while modes 1 and 4 switch between primary and secondary tables on alternate lines */
622  if (mode == 1 || mode == 4) {
623  code = ctx->alt_quant[vq_index];
624  prim_indx = (code >> 4) + ctx->cb_offset;
625  second_indx = (code & 0xF) + ctx->cb_offset;
626  } else {
627  vq_index += ctx->cb_offset;
628  prim_indx = second_indx = vq_index;
629  }
630 
631  if (prim_indx >= 24 || second_indx >= 24) {
632  av_log(avctx, AV_LOG_ERROR, "Invalid VQ table indexes! Primary: %d, secondary: %d!\n",
633  prim_indx, second_indx);
634  return AVERROR_INVALIDDATA;
635  }
636 
637  delta[0] = &vq_tab[second_indx];
638  delta[1] = &vq_tab[prim_indx];
639  swap_quads[0] = second_indx >= 16;
640  swap_quads[1] = prim_indx >= 16;
641 
642  /* requantize the prediction if VQ index of this cell differs from VQ index */
643  /* of the predicted cell in order to avoid overflows. */
644  if (vq_index >= 8 && ref_block) {
645  for (x = 0; x < cell->width << 2; x++)
646  ref_block[x] = requant_tab[vq_index & 7][ref_block[x]];
647  }
648 
649  error = IV3_NOERR;
650 
651  switch (mode) {
652  case 0: /*------------------ MODES 0 & 1 (4x4 block processing) --------------------*/
653  case 1:
654  case 3: /*------------------ MODES 3 & 4 (4x8 block processing) --------------------*/
655  case 4:
656  if (mode >= 3 && cell->mv_ptr) {
657  av_log(avctx, AV_LOG_ERROR, "Attempt to apply Mode 3/4 to an INTER cell!\n");
658  return AVERROR_INVALIDDATA;
659  }
660 
661  zoom_fac = mode >= 3;
662  error = decode_cell_data(ctx, cell, block, ref_block, plane->pitch,
663  0, zoom_fac, mode, delta, swap_quads,
664  &data_ptr, last_ptr);
665  break;
666  case 10: /*-------------------- MODE 10 (8x8 block processing) ---------------------*/
667  case 11: /*----------------- MODE 11 (4x8 INTER block processing) ------------------*/
668  if (mode == 10 && !cell->mv_ptr) { /* MODE 10 INTRA processing */
669  error = decode_cell_data(ctx, cell, block, ref_block, plane->pitch,
670  1, 1, mode, delta, swap_quads,
671  &data_ptr, last_ptr);
672  } else { /* mode 10 and 11 INTER processing */
673  if (mode == 11 && !cell->mv_ptr) {
674  av_log(avctx, AV_LOG_ERROR, "Attempt to use Mode 11 for an INTRA cell!\n");
675  return AVERROR_INVALIDDATA;
676  }
677 
678  zoom_fac = mode == 10;
679  error = decode_cell_data(ctx, cell, block, ref_block, plane->pitch,
680  zoom_fac, 1, mode, delta, swap_quads,
681  &data_ptr, last_ptr);
682  }
683  break;
684  default:
685  av_log(avctx, AV_LOG_ERROR, "Unsupported coding mode: %d\n", mode);
686  return AVERROR_INVALIDDATA;
687  }//switch mode
688 
689  switch (error) {
690  case IV3_BAD_RLE:
691  av_log(avctx, AV_LOG_ERROR, "Mode %d: RLE code %X is not allowed at the current line\n",
692  mode, data_ptr[-1]);
693  return AVERROR_INVALIDDATA;
694  case IV3_BAD_DATA:
695  av_log(avctx, AV_LOG_ERROR, "Mode %d: invalid VQ data\n", mode);
696  return AVERROR_INVALIDDATA;
697  case IV3_BAD_COUNTER:
698  av_log(avctx, AV_LOG_ERROR, "Mode %d: RLE-FB invalid counter: %d\n", mode, code);
699  return AVERROR_INVALIDDATA;
700  case IV3_UNSUPPORTED:
701  av_log(avctx, AV_LOG_ERROR, "Mode %d: unsupported RLE code: %X\n", mode, data_ptr[-1]);
702  return AVERROR_INVALIDDATA;
703  case IV3_OUT_OF_DATA:
704  av_log(avctx, AV_LOG_ERROR, "Mode %d: attempt to read past end of buffer\n", mode);
705  return AVERROR_INVALIDDATA;
706  }
707 
708  return data_ptr - data_start; /* report number of bytes consumed from the input buffer */
709 }
710 
711 
712 /* Binary tree codes. */
713 enum {
714  H_SPLIT = 0,
715  V_SPLIT = 1,
718 };
719 
720 
721 #define SPLIT_CELL(size, new_size) (new_size) = ((size) > 2) ? ((((size) + 2) >> 2) << 1) : 1
722 
723 #define UPDATE_BITPOS(n) \
724  ctx->skip_bits += (n); \
725  ctx->need_resync = 1
726 
727 #define RESYNC_BITSTREAM \
728  if (ctx->need_resync && !(get_bits_count(&ctx->gb) & 7)) { \
729  skip_bits_long(&ctx->gb, ctx->skip_bits); \
730  ctx->skip_bits = 0; \
731  ctx->need_resync = 0; \
732  }
733 
734 #define CHECK_CELL \
735  if (curr_cell.xpos + curr_cell.width > (plane->width >> 2) || \
736  curr_cell.ypos + curr_cell.height > (plane->height >> 2)) { \
737  av_log(avctx, AV_LOG_ERROR, "Invalid cell: x=%d, y=%d, w=%d, h=%d\n", \
738  curr_cell.xpos, curr_cell.ypos, curr_cell.width, curr_cell.height); \
739  return AVERROR_INVALIDDATA; \
740  }
741 
742 
744  Plane *plane, int code, Cell *ref_cell,
745  const int depth, const int strip_width)
746 {
747  Cell curr_cell;
748  int bytes_used, ret;
749 
750  if (depth <= 0) {
751  av_log(avctx, AV_LOG_ERROR, "Stack overflow (corrupted binary tree)!\n");
752  return AVERROR_INVALIDDATA; // unwind recursion
753  }
754 
755  curr_cell = *ref_cell; // clone parent cell
756  if (code == H_SPLIT) {
757  SPLIT_CELL(ref_cell->height, curr_cell.height);
758  ref_cell->ypos += curr_cell.height;
759  ref_cell->height -= curr_cell.height;
760  if (ref_cell->height <= 0 || curr_cell.height <= 0)
761  return AVERROR_INVALIDDATA;
762  } else if (code == V_SPLIT) {
763  if (curr_cell.width > strip_width) {
764  /* split strip */
765  curr_cell.width = (curr_cell.width <= (strip_width << 1) ? 1 : 2) * strip_width;
766  } else
767  SPLIT_CELL(ref_cell->width, curr_cell.width);
768  ref_cell->xpos += curr_cell.width;
769  ref_cell->width -= curr_cell.width;
770  if (ref_cell->width <= 0 || curr_cell.width <= 0)
771  return AVERROR_INVALIDDATA;
772  }
773 
774  while (1) { /* loop until return */
776  switch (code = get_bits(&ctx->gb, 2)) {
777  case H_SPLIT:
778  case V_SPLIT:
779  if (parse_bintree(ctx, avctx, plane, code, &curr_cell, depth - 1, strip_width))
780  return AVERROR_INVALIDDATA;
781  break;
782  case INTRA_NULL:
783  if (!curr_cell.tree) { /* MC tree INTRA code */
784  curr_cell.mv_ptr = 0; /* mark the current strip as INTRA */
785  curr_cell.tree = 1; /* enter the VQ tree */
786  } else { /* VQ tree NULL code */
788  code = get_bits(&ctx->gb, 2);
789  if (code >= 2) {
790  av_log(avctx, AV_LOG_ERROR, "Invalid VQ_NULL code: %d\n", code);
791  return AVERROR_INVALIDDATA;
792  }
793  if (code == 1)
794  av_log(avctx, AV_LOG_ERROR, "SkipCell procedure not implemented yet!\n");
795 
796  CHECK_CELL
797  if (!curr_cell.mv_ptr)
798  return AVERROR_INVALIDDATA;
799  ret = copy_cell(ctx, plane, &curr_cell);
800  return ret;
801  }
802  break;
803  case INTER_DATA:
804  if (!curr_cell.tree) { /* MC tree INTER code */
805  unsigned mv_idx;
806  /* get motion vector index and setup the pointer to the mv set */
807  if (!ctx->need_resync)
808  ctx->next_cell_data = &ctx->gb.buffer[(get_bits_count(&ctx->gb) + 7) >> 3];
809  mv_idx = *(ctx->next_cell_data++);
810  if (mv_idx >= ctx->num_vectors) {
811  av_log(avctx, AV_LOG_ERROR, "motion vector index out of range\n");
812  return AVERROR_INVALIDDATA;
813  }
814  curr_cell.mv_ptr = &ctx->mc_vectors[mv_idx << 1];
815  curr_cell.tree = 1; /* enter the VQ tree */
816  UPDATE_BITPOS(8);
817  } else { /* VQ tree DATA code */
818  if (!ctx->need_resync)
819  ctx->next_cell_data = &ctx->gb.buffer[(get_bits_count(&ctx->gb) + 7) >> 3];
820 
821  CHECK_CELL
822  bytes_used = decode_cell(ctx, avctx, plane, &curr_cell,
823  ctx->next_cell_data, ctx->last_byte);
824  if (bytes_used < 0)
825  return AVERROR_INVALIDDATA;
826 
827  UPDATE_BITPOS(bytes_used << 3);
828  ctx->next_cell_data += bytes_used;
829  return 0;
830  }
831  break;
832  }
833  }//while
834 
835  return 0;
836 }
837 
838 
840  Plane *plane, const uint8_t *data, int32_t data_size,
841  int32_t strip_width)
842 {
843  Cell curr_cell;
844  unsigned num_vectors;
845 
846  /* each plane data starts with mc_vector_count field, */
847  /* an optional array of motion vectors followed by the vq data */
848  num_vectors = bytestream_get_le32(&data);
849  if (num_vectors > 256) {
850  av_log(ctx->avctx, AV_LOG_ERROR,
851  "Read invalid number of motion vectors %d\n", num_vectors);
852  return AVERROR_INVALIDDATA;
853  }
854  if (num_vectors * 2 >= data_size)
855  return AVERROR_INVALIDDATA;
856 
857  ctx->num_vectors = num_vectors;
858  ctx->mc_vectors = num_vectors ? data : 0;
859 
860  /* init the bitreader */
861  init_get_bits(&ctx->gb, &data[num_vectors * 2], (data_size - num_vectors * 2) << 3);
862  ctx->skip_bits = 0;
863  ctx->need_resync = 0;
864 
865  ctx->last_byte = data + data_size - 1;
866 
867  /* initialize the 1st cell and set its dimensions to whole plane */
868  curr_cell.xpos = curr_cell.ypos = 0;
869  curr_cell.width = plane->width >> 2;
870  curr_cell.height = plane->height >> 2;
871  curr_cell.tree = 0; // we are in the MC tree now
872  curr_cell.mv_ptr = 0; // no motion vector = INTRA cell
873 
874  return parse_bintree(ctx, avctx, plane, INTRA_NULL, &curr_cell, CELL_STACK_MAX, strip_width);
875 }
876 
877 
878 #define OS_HDR_ID MKBETAG('F', 'R', 'M', 'H')
879 
881  const uint8_t *buf, int buf_size)
882 {
883  GetByteContext gb;
884  const uint8_t *bs_hdr;
885  uint32_t frame_num, word2, check_sum, data_size;
886  uint32_t y_offset, u_offset, v_offset, starts[3], ends[3];
887  uint16_t height, width;
888  int i, j;
889 
890  bytestream2_init(&gb, buf, buf_size);
891 
892  /* parse and check the OS header */
893  frame_num = bytestream2_get_le32(&gb);
894  word2 = bytestream2_get_le32(&gb);
895  check_sum = bytestream2_get_le32(&gb);
896  data_size = bytestream2_get_le32(&gb);
897 
898  if ((frame_num ^ word2 ^ data_size ^ OS_HDR_ID) != check_sum) {
899  av_log(avctx, AV_LOG_ERROR, "OS header checksum mismatch!\n");
900  return AVERROR_INVALIDDATA;
901  }
902 
903  /* parse the bitstream header */
904  bs_hdr = gb.buffer;
905 
906  if (bytestream2_get_le16(&gb) != 32) {
907  av_log(avctx, AV_LOG_ERROR, "Unsupported codec version!\n");
908  return AVERROR_INVALIDDATA;
909  }
910 
911  ctx->frame_num = frame_num;
912  ctx->frame_flags = bytestream2_get_le16(&gb);
913  ctx->data_size = (bytestream2_get_le32(&gb) + 7) >> 3;
914  ctx->cb_offset = bytestream2_get_byte(&gb);
915 
916  if (ctx->data_size == 16)
917  return 4;
918  ctx->data_size = FFMIN(ctx->data_size, buf_size - 16);
919 
920  bytestream2_skip(&gb, 3); // skip reserved byte and checksum
921 
922  /* check frame dimensions */
923  height = bytestream2_get_le16(&gb);
924  width = bytestream2_get_le16(&gb);
925  if (av_image_check_size(width, height, 0, avctx))
926  return AVERROR_INVALIDDATA;
927 
928  if (width != ctx->width || height != ctx->height) {
929  int res;
930 
931  av_dlog(avctx, "Frame dimensions changed!\n");
932 
933  if (width < 16 || width > 640 ||
934  height < 16 || height > 480 ||
935  width & 3 || height & 3) {
936  av_log(avctx, AV_LOG_ERROR,
937  "Invalid picture dimensions: %d x %d!\n", width, height);
938  return AVERROR_INVALIDDATA;
939  }
940 
941  ctx->width = width;
942  ctx->height = height;
943 
944  free_frame_buffers(ctx);
945  if ((res = allocate_frame_buffers(ctx, avctx)) < 0)
946  return res;
947  ff_set_dimensions(avctx, width, height);
948  }
949 
950  y_offset = bytestream2_get_le32(&gb);
951  v_offset = bytestream2_get_le32(&gb);
952  u_offset = bytestream2_get_le32(&gb);
953  bytestream2_skip(&gb, 4);
954 
955  /* unfortunately there is no common order of planes in the buffer */
956  /* so we use that sorting algo for determining planes data sizes */
957  starts[0] = y_offset;
958  starts[1] = v_offset;
959  starts[2] = u_offset;
960 
961  for (j = 0; j < 3; j++) {
962  ends[j] = ctx->data_size;
963  for (i = 2; i >= 0; i--)
964  if (starts[i] < ends[j] && starts[i] > starts[j])
965  ends[j] = starts[i];
966  }
967 
968  ctx->y_data_size = ends[0] - starts[0];
969  ctx->v_data_size = ends[1] - starts[1];
970  ctx->u_data_size = ends[2] - starts[2];
971  if (FFMAX3(y_offset, v_offset, u_offset) >= ctx->data_size - 16 ||
972  FFMIN3(y_offset, v_offset, u_offset) < gb.buffer - bs_hdr + 16 ||
973  FFMIN3(ctx->y_data_size, ctx->v_data_size, ctx->u_data_size) <= 0) {
974  av_log(avctx, AV_LOG_ERROR, "One of the y/u/v offsets is invalid\n");
975  return AVERROR_INVALIDDATA;
976  }
977 
978  ctx->y_data_ptr = bs_hdr + y_offset;
979  ctx->v_data_ptr = bs_hdr + v_offset;
980  ctx->u_data_ptr = bs_hdr + u_offset;
981  ctx->alt_quant = gb.buffer;
982 
983  if (ctx->data_size == 16) {
984  av_log(avctx, AV_LOG_DEBUG, "Sync frame encountered!\n");
985  return 16;
986  }
987 
988  if (ctx->frame_flags & BS_8BIT_PEL) {
989  avpriv_request_sample(avctx, "8-bit pixel format");
990  return AVERROR_PATCHWELCOME;
991  }
992 
993  if (ctx->frame_flags & BS_MV_X_HALF || ctx->frame_flags & BS_MV_Y_HALF) {
994  avpriv_request_sample(avctx, "Halfpel motion vectors");
995  return AVERROR_PATCHWELCOME;
996  }
997 
998  return 0;
999 }
1000 
1001 
1012 static void output_plane(const Plane *plane, int buf_sel, uint8_t *dst,
1013  int dst_pitch, int dst_height)
1014 {
1015  int x,y;
1016  const uint8_t *src = plane->pixels[buf_sel];
1017  uint32_t pitch = plane->pitch;
1018 
1019  dst_height = FFMIN(dst_height, plane->height);
1020  for (y = 0; y < dst_height; y++) {
1021  /* convert four pixels at once using SWAR */
1022  for (x = 0; x < plane->width >> 2; x++) {
1023  AV_WN32A(dst, (AV_RN32A(src) & 0x7F7F7F7F) << 1);
1024  src += 4;
1025  dst += 4;
1026  }
1027 
1028  for (x <<= 2; x < plane->width; x++)
1029  *dst++ = *src++ << 1;
1030 
1031  src += pitch - plane->width;
1032  dst += dst_pitch - plane->width;
1033  }
1034 }
1035 
1036 
1038 {
1039  Indeo3DecodeContext *ctx = avctx->priv_data;
1040 
1041  ctx->avctx = avctx;
1042  ctx->width = avctx->width;
1043  ctx->height = avctx->height;
1044  avctx->pix_fmt = AV_PIX_FMT_YUV410P;
1045 
1047 
1048  ff_hpeldsp_init(&ctx->hdsp, avctx->flags);
1049 
1050  allocate_frame_buffers(ctx, avctx);
1051 
1052  return 0;
1053 }
1054 
1055 
1056 static int decode_frame(AVCodecContext *avctx, void *data, int *got_frame,
1057  AVPacket *avpkt)
1058 {
1059  Indeo3DecodeContext *ctx = avctx->priv_data;
1060  const uint8_t *buf = avpkt->data;
1061  int buf_size = avpkt->size;
1062  AVFrame *frame = data;
1063  int res;
1064 
1065  res = decode_frame_headers(ctx, avctx, buf, buf_size);
1066  if (res < 0)
1067  return res;
1068 
1069  /* skip sync(null) frames */
1070  if (res) {
1071  // we have processed 16 bytes but no data was decoded
1072  *got_frame = 0;
1073  return buf_size;
1074  }
1075 
1076  /* skip droppable INTER frames if requested */
1077  if (ctx->frame_flags & BS_NONREF &&
1078  (avctx->skip_frame >= AVDISCARD_NONREF))
1079  return 0;
1080 
1081  /* skip INTER frames if requested */
1082  if (!(ctx->frame_flags & BS_KEYFRAME) && avctx->skip_frame >= AVDISCARD_NONKEY)
1083  return 0;
1084 
1085  /* use BS_BUFFER flag for buffer switching */
1086  ctx->buf_sel = (ctx->frame_flags >> BS_BUFFER) & 1;
1087 
1088  /* decode luma plane */
1089  if ((res = decode_plane(ctx, avctx, ctx->planes, ctx->y_data_ptr, ctx->y_data_size, 40)))
1090  return res;
1091 
1092  /* decode chroma planes */
1093  if ((res = decode_plane(ctx, avctx, &ctx->planes[1], ctx->u_data_ptr, ctx->u_data_size, 10)))
1094  return res;
1095 
1096  if ((res = decode_plane(ctx, avctx, &ctx->planes[2], ctx->v_data_ptr, ctx->v_data_size, 10)))
1097  return res;
1098 
1099  if ((res = ff_get_buffer(avctx, frame, 0)) < 0) {
1100  av_log(ctx->avctx, AV_LOG_ERROR, "get_buffer() failed\n");
1101  return res;
1102  }
1103 
1104  output_plane(&ctx->planes[0], ctx->buf_sel,
1105  frame->data[0], frame->linesize[0],
1106  avctx->height);
1107  output_plane(&ctx->planes[1], ctx->buf_sel,
1108  frame->data[1], frame->linesize[1],
1109  (avctx->height + 3) >> 2);
1110  output_plane(&ctx->planes[2], ctx->buf_sel,
1111  frame->data[2], frame->linesize[2],
1112  (avctx->height + 3) >> 2);
1113 
1114  *got_frame = 1;
1115 
1116  return buf_size;
1117 }
1118 
1119 
1121 {
1122  free_frame_buffers(avctx->priv_data);
1123 
1124  return 0;
1125 }
1126 
1128  .name = "indeo3",
1129  .long_name = NULL_IF_CONFIG_SMALL("Intel Indeo 3"),
1130  .type = AVMEDIA_TYPE_VIDEO,
1131  .id = AV_CODEC_ID_INDEO3,
1132  .priv_data_size = sizeof(Indeo3DecodeContext),
1133  .init = decode_init,
1134  .close = decode_close,
1135  .decode = decode_frame,
1136  .capabilities = CODEC_CAP_DR1,
1137 };
static int decode_cell(Indeo3DecodeContext *ctx, AVCodecContext *avctx, Plane *plane, Cell *cell, const uint8_t *data_ptr, const uint8_t *last_ptr)
Decode a vector-quantized cell.
Definition: indeo3.c:573
void * av_malloc(size_t size)
Allocate a block of size bytes with alignment suitable for all memory accesses (including vectors if ...
Definition: mem.c:62
discard all frames except keyframes
Definition: avcodec.h:545
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:54
same as RLE_ESC_FA + do the same with next block
Definition: indeo3.c:44
This structure describes decoded (raw) audio or video data.
Definition: frame.h:107
#define BS_8BIT_PEL
8bit pixel bitdepth indicator
Definition: indeo3.c:55
const uint8_t * next_cell_data
Definition: indeo3.c:89
static int decode_plane(Indeo3DecodeContext *ctx, AVCodecContext *avctx, Plane *plane, const uint8_t *data, int32_t data_size, int32_t strip_width)
Definition: indeo3.c:839
int16_t xpos
cell coordinates in 4x4 blocks
Definition: indeo3.c:74
misc image utilities
static unsigned int get_bits(GetBitContext *s, int n)
Read 1-25 bits.
Definition: get_bits.h:240
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:144
const uint8_t * y_data_ptr
Definition: indeo3.c:100
int16_t height
cell height in 4x4 blocks
Definition: indeo3.c:77
int size
Definition: avcodec.h:974
uint8_t quad_exp
log2 of four-pixel deltas
Definition: indeo3data.h:327
uint8_t num_dyads
number of two-pixel deltas
Definition: indeo3data.h:326
const uint8_t * v_data_ptr
Definition: indeo3.c:101
const uint8_t * buffer
Definition: get_bits.h:54
#define UPDATE_BITPOS(n)
Definition: indeo3.c:723
#define RLE_LINES_COPY_M10
Definition: indeo3.c:350
#define BS_BUFFER
indicates which of two frame buffers should be used
Definition: indeo3.c:60
#define RLE_BLOCK_COPY
Definition: indeo3.c:334
enum AVPixelFormat pix_fmt
Pixel format, see AV_PIX_FMT_xxx.
Definition: avcodec.h:1247
static av_always_inline void bytestream2_init(GetByteContext *g, const uint8_t *buf, int buf_size)
Definition: bytestream.h:130
static av_cold void free_frame_buffers(Indeo3DecodeContext *ctx)
Definition: indeo3.c:205
av_dlog(ac->avr,"%d samples - audio_convert: %s to %s (%s)\n", 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)
int32_t u_data_size
Definition: indeo3.c:105
uint32_t frame_num
current frame number (zero-based)
Definition: indeo3.c:95
AVCodec.
Definition: avcodec.h:2755
#define AV_WN32A(p, v)
Definition: intreadwrite.h:458
uint8_t buf_sel
active frame buffer: 0 - primary, 1 -secondary
Definition: indeo3.c:99
int16_t height
Definition: indeo3.c:94
#define FFALIGN(x, a)
Definition: common.h:62
void av_freep(void *arg)
Free a memory block which has been allocated with av_malloc(z)() or av_realloc() and set the pointer ...
Definition: mem.c:198
enum AVDiscard skip_frame
Definition: avcodec.h:2701
#define AV_RN32A(p)
Definition: intreadwrite.h:446
static int decode(MimicContext *ctx, int quality, int num_coeffs, int is_iframe)
Definition: mimic.c:269
#define BS_KEYFRAME
intra frame indicator
Definition: indeo3.c:56
void void avpriv_request_sample(void *avc, const char *msg,...) av_printf_format(2
Log a generic warning message about a missing feature.
uint8_t
#define av_cold
Definition: attributes.h:66
apply null delta to all lines up to the 2nd line
Definition: indeo3.c:50
float delta
AVCodecContext * avctx
Definition: indeo3.c:83
#define RLE_LINES_COPY
Definition: indeo3.c:347
#define CHECK_CELL
Definition: indeo3.c:734
static av_cold int decode_close(AVCodecContext *avctx)
Definition: indeo3.c:1120
apply null delta to all remaining lines of this block
Definition: indeo3.c:48
int32_t y_data_size
Definition: indeo3.c:103
#define CODEC_CAP_DR1
Codec uses get_buffer() for allocating buffers and supports custom allocators.
Definition: avcodec.h:711
const char data[16]
Definition: mxf.c:66
uint8_t * data
Definition: avcodec.h:973
static int get_bits_count(const GetBitContext *s)
Definition: get_bits.h:194
const uint8_t * buffer
Definition: bytestream.h:33
#define FFMIN3(a, b, c)
Definition: common.h:58
bitstream reader API header.
static int decode_frame_headers(Indeo3DecodeContext *ctx, AVCodecContext *avctx, const uint8_t *buf, int buf_size)
Definition: indeo3.c:880
static uint64_t replicate64(uint64_t a)
Definition: indeo3.c:287
#define OS_HDR_ID
Definition: indeo3.c:878
const uint8_t * last_byte
Definition: indeo3.c:90
uint32_t pitch
Definition: indeo3.c:68
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:123
static void output_plane(const Plane *plane, int buf_sel, uint8_t *dst, int dst_pitch, int dst_height)
Convert and output the current plane.
Definition: indeo3.c:1012
uint32_t width
Definition: indeo3.c:66
uint16_t frame_flags
frame properties
Definition: indeo3.c:97
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:142
uint8_t cb_offset
needed for selecting VQ tables
Definition: indeo3.c:98
apply null delta to all lines up to the 3rd line
Definition: indeo3.c:49
#define AV_LOG_DEBUG
Stuff which is only useful for libav* developers.
Definition: log.h:144
int flags
CODEC_FLAG_*.
Definition: avcodec.h:1142
Definition: graph2dot.c:49
static const vqEntry vq_tab[24]
Definition: indeo3data.h:330
void av_log(void *avcl, int level, const char *fmt,...)
Definition: log.c:148
const char * name
Name of the codec implementation.
Definition: avcodec.h:2762
av_cold void ff_hpeldsp_init(HpelDSPContext *c, int flags)
Definition: hpeldsp.c:37
apply null delta to N blocks / skip N blocks
Definition: indeo3.c:46
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
Half-pel DSP context.
Definition: hpeldsp.h:45
#define BS_NONREF
nonref (discardable) frame indicator
Definition: indeo3.c:59
uint8_t * pixels[2]
pointer to the actual pixel data of the buffers above
Definition: indeo3.c:65
#define APPLY_DELTA_8
Definition: indeo3.c:372
#define FFMIN(a, b)
Definition: common.h:57
In the ELBG jargon, a cell is the set of points that are closest to a codebook entry.
Definition: elbg.c:38
uint8_t * buffers[2]
Definition: indeo3.c:64
int width
picture width / height.
Definition: avcodec.h:1217
#define BS_MV_X_HALF
horizontal mv halfpel resolution indicator
Definition: indeo3.c:58
const uint8_t * alt_quant
secondary VQ table set for the modes 1 and 4
Definition: indeo3.c:106
int32_t
static uint32_t replicate32(uint32_t a)
Definition: indeo3.c:298
#define BUFFER_PRECHECK
Definition: indeo3.c:330
#define RESYNC_BITSTREAM
Definition: indeo3.c:727
#define AV_WN64A(p, v)
Definition: intreadwrite.h:462
#define RLE_BLOCK_COPY_8
Definition: indeo3.c:338
const int8_t * mv_ptr
ptr to the motion vector if any
Definition: indeo3.c:79
#define APPLY_DELTA_4
Definition: indeo3.c:359
#define AVERROR_PATCHWELCOME
Not yet implemented in Libav, patches welcome.
Definition: error.h:57
Half-pel DSP functions.
static int width
Definition: utils.c:156
#define CELL_STACK_MAX
Definition: indeo3.c:71
static void fill_64(uint8_t *dst, const uint64_t pix, int32_t n, int32_t row_offset)
Definition: indeo3.c:311
Libavcodec external API header.
static int copy_cell(Indeo3DecodeContext *ctx, Plane *plane, Cell *cell)
Copy pixels of the cell(x + mv_x, y + mv_y) from the previous frame into the cell(x, y) in the current frame.
Definition: indeo3.c:225
int linesize[AV_NUM_DATA_POINTERS]
For video, size in bytes of each picture line.
Definition: frame.h:125
main external API structure.
Definition: avcodec.h:1054
static void close(AVCodecParserContext *s)
Definition: h264_parser.c:489
int ff_get_buffer(AVCodecContext *avctx, AVFrame *frame, int flags)
Get a buffer for a frame.
Definition: utils.c:575
op_pixels_func put_pixels_tab[4][4]
Halfpel motion compensation with rounding (a+b+1)>>1.
Definition: hpeldsp.h:56
HpelDSPContext hdsp
Definition: indeo3.c:84
planar YUV 4:1:0, 9bpp, (1 Cr & Cb sample per 4x4 Y samples)
Definition: pixfmt.h:71
const int8_t * mc_vectors
Definition: indeo3.c:91
#define SPLIT_CELL(size, new_size)
Definition: indeo3.c:721
Definition: indeo3.c:73
int32_t v_data_size
Definition: indeo3.c:104
int16_t width
cell width in 4x4 blocks
Definition: indeo3.c:76
static int init_get_bits(GetBitContext *s, const uint8_t *buffer, int bit_size)
Initialize GetBitContext.
Definition: get_bits.h:375
int16_t width
Definition: indeo3.c:94
static int step
Definition: avplay.c:247
static av_cold int decode_init(AVCodecContext *avctx)
Definition: indeo3.c:1037
int16_t ypos
Definition: indeo3.c:75
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
Definition: frame.h:113
INTRA: skip block, INTER: copy data from reference.
Definition: indeo3.c:45
static int parse_bintree(Indeo3DecodeContext *ctx, AVCodecContext *avctx, Plane *plane, int code, Cell *ref_cell, const int depth, const int strip_width)
Definition: indeo3.c:743
int height
Definition: gxfenc.c:72
static av_cold void build_requant_tab(void)
Definition: indeo3.c:118
Plane planes[3]
Definition: indeo3.c:107
discard all non reference
Definition: avcodec.h:543
static uint8_t requant_tab[8][128]
Definition: indeo3.c:111
common internal api header.
static av_cold int init(AVCodecParserContext *s)
Definition: h264_parser.c:498
unsigned num_vectors
number of motion vectors in mc_vectors
Definition: indeo3.c:92
void * priv_data
Definition: avcodec.h:1090
uint32_t data_size
size of the frame data in bytes
Definition: indeo3.c:96
#define BS_MV_Y_HALF
vertical mv halfpel resolution indicator
Definition: indeo3.c:57
GetBitContext gb
Definition: indeo3.c:86
AVCodec ff_indeo3_decoder
Definition: indeo3.c:1127
static int decode_frame(AVCodecContext *avctx, void *data, int *got_frame, AVPacket *avpkt)
Definition: indeo3.c:1056
static int decode_cell_data(Indeo3DecodeContext *ctx, Cell *cell, uint8_t *block, uint8_t *ref_block, int pitch, int h_zoom, int v_zoom, int mode, const vqEntry *delta[2], int swap_quads[2], const uint8_t **data_ptr, const uint8_t *last_ptr)
Definition: indeo3.c:416
const uint8_t * u_data_ptr
Definition: indeo3.c:102
uint8_t tree
tree id: 0- MC tree, 1 - VQ tree
Definition: indeo3.c:78
#define FFSWAP(type, a, b)
Definition: common.h:60
static av_cold int allocate_frame_buffers(Indeo3DecodeContext *ctx, AVCodecContext *avctx)
Definition: indeo3.c:150
same as RLE_ESC_FD + do the same with next block
Definition: indeo3.c:47
This structure stores compressed data.
Definition: avcodec.h:950
#define FFMAX3(a, b, c)
Definition: common.h:56
Definition: indeo3.c:63
#define APPLY_DELTA_1011_INTER
Definition: indeo3.c:394
static int16_t block[64]
Definition: dct-test.c:170
uint32_t height
Definition: indeo3.c:67