FFmpeg  4.4.6
indeo3.c
Go to the documentation of this file.
1 /*
2  * Indeo Video v3 compatible decoder
3  * Copyright (c) 2009 - 2011 Maxim Poliakovski
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  * This is a decoder for Intel Indeo Video v3.
25  * It is based on vector quantization, run-length coding and motion compensation.
26  * Known container formats: .avi and .mov
27  * Known FOURCCs: 'IV31', 'IV32'
28  *
29  * @see http://wiki.multimedia.cx/index.php?title=Indeo_3
30  */
31 
32 #include "libavutil/imgutils.h"
33 #include "libavutil/intreadwrite.h"
34 #include "avcodec.h"
35 #include "copy_block.h"
36 #include "bytestream.h"
37 #include "get_bits.h"
38 #include "hpeldsp.h"
39 #include "internal.h"
40 
41 #include "indeo3data.h"
42 
43 /* RLE opcodes. */
44 enum {
45  RLE_ESC_F9 = 249, ///< same as RLE_ESC_FA + do the same with next block
46  RLE_ESC_FA = 250, ///< INTRA: skip block, INTER: copy data from reference
47  RLE_ESC_FB = 251, ///< apply null delta to N blocks / skip N blocks
48  RLE_ESC_FC = 252, ///< same as RLE_ESC_FD + do the same with next block
49  RLE_ESC_FD = 253, ///< apply null delta to all remaining lines of this block
50  RLE_ESC_FE = 254, ///< apply null delta to all lines up to the 3rd line
51  RLE_ESC_FF = 255 ///< apply null delta to all lines up to the 2nd line
52 };
53 
54 
55 /* Some constants for parsing frame bitstream flags. */
56 #define BS_8BIT_PEL (1 << 1) ///< 8-bit pixel bitdepth indicator
57 #define BS_KEYFRAME (1 << 2) ///< intra frame indicator
58 #define BS_MV_Y_HALF (1 << 4) ///< vertical mv halfpel resolution indicator
59 #define BS_MV_X_HALF (1 << 5) ///< horizontal mv halfpel resolution indicator
60 #define BS_NONREF (1 << 8) ///< nonref (discardable) frame indicator
61 #define BS_BUFFER 9 ///< indicates which of two frame buffers should be used
62 
63 
64 typedef struct Plane {
66  uint8_t *pixels[2]; ///< pointer to the actual pixel data of the buffers above
67  uint32_t width;
68  uint32_t height;
69  ptrdiff_t pitch;
70 } Plane;
71 
72 #define CELL_STACK_MAX 20
73 
74 typedef struct Cell {
75  int16_t xpos; ///< cell coordinates in 4x4 blocks
76  int16_t ypos;
77  int16_t width; ///< cell width in 4x4 blocks
78  int16_t height; ///< cell height in 4x4 blocks
79  uint8_t tree; ///< tree id: 0- MC tree, 1 - VQ tree
80  const int8_t *mv_ptr; ///< ptr to the motion vector if any
81 } Cell;
82 
83 typedef struct Indeo3DecodeContext {
86 
89  int skip_bits;
92  const int8_t *mc_vectors;
93  unsigned num_vectors; ///< number of motion vectors in mc_vectors
94 
95  int16_t width, height;
96  uint32_t frame_num; ///< current frame number (zero-based)
97  int data_size; ///< size of the frame data in bytes
98  uint16_t frame_flags; ///< frame properties
99  uint8_t cb_offset; ///< needed for selecting VQ tables
100  uint8_t buf_sel; ///< active frame buffer: 0 - primary, 1 -secondary
107  const uint8_t *alt_quant; ///< secondary VQ table set for the modes 1 and 4
110 
111 
112 static uint8_t requant_tab[8][128];
113 
114 /*
115  * Build the static requantization table.
116  * This table is used to remap pixel values according to a specific
117  * quant index and thus avoid overflows while adding deltas.
118  */
119 static av_cold void build_requant_tab(void)
120 {
121  static const int8_t offsets[8] = { 1, 1, 2, -3, -3, 3, 4, 4 };
122  static const int8_t deltas [8] = { 0, 1, 0, 4, 4, 1, 0, 1 };
123 
124  int i, j, step;
125 
126  for (i = 0; i < 8; i++) {
127  step = i + 2;
128  for (j = 0; j < 128; j++)
129  requant_tab[i][j] = (j + offsets[i]) / step * step + deltas[i];
130  }
131 
132  /* some last elements calculated above will have values >= 128 */
133  /* pixel values shall never exceed 127 so set them to non-overflowing values */
134  /* according with the quantization step of the respective section */
135  requant_tab[0][127] = 126;
136  requant_tab[1][119] = 118;
137  requant_tab[1][120] = 118;
138  requant_tab[2][126] = 124;
139  requant_tab[2][127] = 124;
140  requant_tab[6][124] = 120;
141  requant_tab[6][125] = 120;
142  requant_tab[6][126] = 120;
143  requant_tab[6][127] = 120;
144 
145  /* Patch for compatibility with the Intel's binary decoders */
146  requant_tab[1][7] = 10;
147  requant_tab[4][8] = 10;
148 }
149 
150 
152 {
153  int p;
154 
155  ctx->width = ctx->height = 0;
156 
157  for (p = 0; p < 3; p++) {
158  av_freep(&ctx->planes[p].buffers[0]);
159  av_freep(&ctx->planes[p].buffers[1]);
160  ctx->planes[p].pixels[0] = ctx->planes[p].pixels[1] = 0;
161  }
162 }
163 
164 
166  AVCodecContext *avctx, int luma_width, int luma_height)
167 {
168  int p, chroma_width, chroma_height;
169  int luma_size, chroma_size;
170  ptrdiff_t luma_pitch, chroma_pitch;
171 
172  luma_width = FFALIGN(luma_width , 2);
173  luma_height = FFALIGN(luma_height, 2);
174 
175  if (luma_width < 16 || luma_width > 640 ||
176  luma_height < 16 || luma_height > 480 ||
177  luma_width & 1 || luma_height & 1) {
178  av_log(avctx, AV_LOG_ERROR, "Invalid picture dimensions: %d x %d!\n",
179  luma_width, luma_height);
180  return AVERROR_INVALIDDATA;
181  }
182 
183  ctx->width = luma_width ;
184  ctx->height = luma_height;
185 
186  chroma_width = FFALIGN(luma_width >> 2, 4);
187  chroma_height = FFALIGN(luma_height >> 2, 4);
188 
189  luma_pitch = FFALIGN(luma_width, 16);
190  chroma_pitch = FFALIGN(chroma_width, 16);
191 
192  /* Calculate size of the luminance plane. */
193  /* Add one line more for INTRA prediction. */
194  luma_size = luma_pitch * (luma_height + 1);
195 
196  /* Calculate size of a chrominance planes. */
197  /* Add one line more for INTRA prediction. */
198  chroma_size = chroma_pitch * (chroma_height + 1);
199 
200  /* allocate frame buffers */
201  for (p = 0; p < 3; p++) {
202  ctx->planes[p].pitch = !p ? luma_pitch : chroma_pitch;
203  ctx->planes[p].width = !p ? luma_width : chroma_width;
204  ctx->planes[p].height = !p ? luma_height : chroma_height;
205 
206  ctx->planes[p].buffers[0] = av_malloc(!p ? luma_size : chroma_size);
207  ctx->planes[p].buffers[1] = av_malloc(!p ? luma_size : chroma_size);
208 
209  if (!ctx->planes[p].buffers[0] || !ctx->planes[p].buffers[1])
210  return AVERROR(ENOMEM);
211 
212  /* fill the INTRA prediction lines with the middle pixel value = 64 */
213  memset(ctx->planes[p].buffers[0], 0x40, ctx->planes[p].pitch);
214  memset(ctx->planes[p].buffers[1], 0x40, ctx->planes[p].pitch);
215 
216  /* set buffer pointers = buf_ptr + pitch and thus skip the INTRA prediction line */
217  ctx->planes[p].pixels[0] = ctx->planes[p].buffers[0] + ctx->planes[p].pitch;
218  ctx->planes[p].pixels[1] = ctx->planes[p].buffers[1] + ctx->planes[p].pitch;
219  memset(ctx->planes[p].pixels[0], 0, ctx->planes[p].pitch * ctx->planes[p].height);
220  memset(ctx->planes[p].pixels[1], 0, ctx->planes[p].pitch * ctx->planes[p].height);
221  }
222 
223  return 0;
224 }
225 
226 /**
227  * Copy pixels of the cell(x + mv_x, y + mv_y) from the previous frame into
228  * the cell(x, y) in the current frame.
229  *
230  * @param ctx pointer to the decoder context
231  * @param plane pointer to the plane descriptor
232  * @param cell pointer to the cell descriptor
233  */
235 {
236  int h, w, mv_x, mv_y, offset, offset_dst;
237  uint8_t *src, *dst;
238 
239  /* setup output and reference pointers */
240  offset_dst = (cell->ypos << 2) * plane->pitch + (cell->xpos << 2);
241  dst = plane->pixels[ctx->buf_sel] + offset_dst;
242  if(cell->mv_ptr){
243  mv_y = cell->mv_ptr[0];
244  mv_x = cell->mv_ptr[1];
245  }else
246  mv_x= mv_y= 0;
247 
248  /* -1 because there is an extra line on top for prediction */
249  if ((cell->ypos << 2) + mv_y < -1 || (cell->xpos << 2) + mv_x < 0 ||
250  ((cell->ypos + cell->height) << 2) + mv_y > plane->height ||
251  ((cell->xpos + cell->width) << 2) + mv_x > plane->width) {
252  av_log(ctx->avctx, AV_LOG_ERROR,
253  "Motion vectors point out of the frame.\n");
254  return AVERROR_INVALIDDATA;
255  }
256 
257  offset = offset_dst + mv_y * plane->pitch + mv_x;
258  src = plane->pixels[ctx->buf_sel ^ 1] + offset;
259 
260  h = cell->height << 2;
261 
262  for (w = cell->width; w > 0;) {
263  /* copy using 16xH blocks */
264  if (!((cell->xpos << 2) & 15) && w >= 4) {
265  for (; w >= 4; src += 16, dst += 16, w -= 4)
266  ctx->hdsp.put_pixels_tab[0][0](dst, src, plane->pitch, h);
267  }
268 
269  /* copy using 8xH blocks */
270  if (!((cell->xpos << 2) & 7) && w >= 2) {
271  ctx->hdsp.put_pixels_tab[1][0](dst, src, plane->pitch, h);
272  w -= 2;
273  src += 8;
274  dst += 8;
275  } else if (w >= 1) {
276  ctx->hdsp.put_pixels_tab[2][0](dst, src, plane->pitch, h);
277  w--;
278  src += 4;
279  dst += 4;
280  }
281  }
282 
283  return 0;
284 }
285 
286 
287 /* Average 4/8 pixels at once without rounding using SWAR */
288 #define AVG_32(dst, src, ref) \
289  AV_WN32A(dst, ((AV_RN32(src) + AV_RN32(ref)) >> 1) & 0x7F7F7F7FUL)
290 
291 #define AVG_64(dst, src, ref) \
292  AV_WN64A(dst, ((AV_RN64(src) + AV_RN64(ref)) >> 1) & 0x7F7F7F7F7F7F7F7FULL)
293 
294 
295 /*
296  * Replicate each even pixel as follows:
297  * ABCDEFGH -> AACCEEGG
298  */
299 static inline uint64_t replicate64(uint64_t a) {
300 #if HAVE_BIGENDIAN
301  a &= 0xFF00FF00FF00FF00ULL;
302  a |= a >> 8;
303 #else
304  a &= 0x00FF00FF00FF00FFULL;
305  a |= a << 8;
306 #endif
307  return a;
308 }
309 
310 static inline uint32_t replicate32(uint32_t a) {
311 #if HAVE_BIGENDIAN
312  a &= 0xFF00FF00UL;
313  a |= a >> 8;
314 #else
315  a &= 0x00FF00FFUL;
316  a |= a << 8;
317 #endif
318  return a;
319 }
320 
321 
322 /* Fill n lines with 64-bit pixel value pix */
323 static inline void fill_64(uint8_t *dst, const uint64_t pix, int32_t n,
324  int32_t row_offset)
325 {
326  for (; n > 0; dst += row_offset, n--)
327  AV_WN64A(dst, pix);
328 }
329 
330 
331 /* Error codes for cell decoding. */
332 enum {
338  IV3_OUT_OF_DATA = 5
339 };
340 
341 
342 #define BUFFER_PRECHECK \
343 if (*data_ptr >= last_ptr) \
344  return IV3_OUT_OF_DATA; \
345 
346 #define RLE_BLOCK_COPY \
347  if (cell->mv_ptr || !skip_flag) \
348  copy_block4(dst, ref, row_offset, row_offset, 4 << v_zoom)
349 
350 #define RLE_BLOCK_COPY_8 \
351  pix64 = AV_RN64(ref);\
352  if (is_first_row) {/* special prediction case: top line of a cell */\
353  pix64 = replicate64(pix64);\
354  fill_64(dst + row_offset, pix64, 7, row_offset);\
355  AVG_64(dst, ref, dst + row_offset);\
356  } else \
357  fill_64(dst, pix64, 8, row_offset)
358 
359 #define RLE_LINES_COPY \
360  copy_block4(dst, ref, row_offset, row_offset, num_lines << v_zoom)
361 
362 #define RLE_LINES_COPY_M10 \
363  pix64 = AV_RN64(ref);\
364  if (is_top_of_cell) {\
365  pix64 = replicate64(pix64);\
366  fill_64(dst + row_offset, pix64, (num_lines << 1) - 1, row_offset);\
367  AVG_64(dst, ref, dst + row_offset);\
368  } else \
369  fill_64(dst, pix64, num_lines << 1, row_offset)
370 
371 #define APPLY_DELTA_4 \
372  AV_WN16A(dst + line_offset ,\
373  (AV_RN16(ref ) + delta_tab->deltas[dyad1]) & 0x7F7F);\
374  AV_WN16A(dst + line_offset + 2,\
375  (AV_RN16(ref + 2) + delta_tab->deltas[dyad2]) & 0x7F7F);\
376  if (mode >= 3) {\
377  if (is_top_of_cell && !cell->ypos) {\
378  AV_COPY32U(dst, dst + row_offset);\
379  } else {\
380  AVG_32(dst, ref, dst + row_offset);\
381  }\
382  }
383 
384 #define APPLY_DELTA_8 \
385  /* apply two 32-bit VQ deltas to next even line */\
386  if (is_top_of_cell) { \
387  AV_WN32A(dst + row_offset , \
388  (replicate32(AV_RN32(ref )) + delta_tab->deltas_m10[dyad1]) & 0x7F7F7F7F);\
389  AV_WN32A(dst + row_offset + 4, \
390  (replicate32(AV_RN32(ref + 4)) + delta_tab->deltas_m10[dyad2]) & 0x7F7F7F7F);\
391  } else { \
392  AV_WN32A(dst + row_offset , \
393  (AV_RN32(ref ) + delta_tab->deltas_m10[dyad1]) & 0x7F7F7F7F);\
394  AV_WN32A(dst + row_offset + 4, \
395  (AV_RN32(ref + 4) + delta_tab->deltas_m10[dyad2]) & 0x7F7F7F7F);\
396  } \
397  /* odd lines are not coded but rather interpolated/replicated */\
398  /* first line of the cell on the top of image? - replicate */\
399  /* otherwise - interpolate */\
400  if (is_top_of_cell && !cell->ypos) {\
401  AV_COPY64U(dst, dst + row_offset);\
402  } else \
403  AVG_64(dst, ref, dst + row_offset);
404 
405 
406 #define APPLY_DELTA_1011_INTER \
407  if (mode == 10) { \
408  AV_WN32A(dst , \
409  (AV_RN32(dst ) + delta_tab->deltas_m10[dyad1]) & 0x7F7F7F7F);\
410  AV_WN32A(dst + 4 , \
411  (AV_RN32(dst + 4 ) + delta_tab->deltas_m10[dyad2]) & 0x7F7F7F7F);\
412  AV_WN32A(dst + row_offset , \
413  (AV_RN32(dst + row_offset ) + delta_tab->deltas_m10[dyad1]) & 0x7F7F7F7F);\
414  AV_WN32A(dst + row_offset + 4, \
415  (AV_RN32(dst + row_offset + 4) + delta_tab->deltas_m10[dyad2]) & 0x7F7F7F7F);\
416  } else { \
417  AV_WN16A(dst , \
418  (AV_RN16(dst ) + delta_tab->deltas[dyad1]) & 0x7F7F);\
419  AV_WN16A(dst + 2 , \
420  (AV_RN16(dst + 2 ) + delta_tab->deltas[dyad2]) & 0x7F7F);\
421  AV_WN16A(dst + row_offset , \
422  (AV_RN16(dst + row_offset ) + delta_tab->deltas[dyad1]) & 0x7F7F);\
423  AV_WN16A(dst + row_offset + 2, \
424  (AV_RN16(dst + row_offset + 2) + delta_tab->deltas[dyad2]) & 0x7F7F);\
425  }
426 
427 
429  uint8_t *block, uint8_t *ref_block,
430  ptrdiff_t row_offset, int h_zoom, int v_zoom, int mode,
431  const vqEntry *delta[2], int swap_quads[2],
432  const uint8_t **data_ptr, const uint8_t *last_ptr)
433 {
434  int x, y, line, num_lines;
435  int rle_blocks = 0;
436  uint8_t code, *dst, *ref;
437  const vqEntry *delta_tab;
438  unsigned int dyad1, dyad2;
439  uint64_t pix64;
440  int skip_flag = 0, is_top_of_cell, is_first_row = 1;
441  int blk_row_offset, line_offset;
442 
443  blk_row_offset = (row_offset << (2 + v_zoom)) - (cell->width << 2);
444  line_offset = v_zoom ? row_offset : 0;
445 
446  if (cell->height & v_zoom || cell->width & h_zoom)
447  return IV3_BAD_DATA;
448 
449  for (y = 0; y < cell->height; is_first_row = 0, y += 1 + v_zoom) {
450  for (x = 0; x < cell->width; x += 1 + h_zoom) {
451  ref = ref_block;
452  dst = block;
453 
454  if (rle_blocks > 0) {
455  if (mode <= 4) {
457  } else if (mode == 10 && !cell->mv_ptr) {
459  }
460  rle_blocks--;
461  } else {
462  for (line = 0; line < 4;) {
463  num_lines = 1;
464  is_top_of_cell = is_first_row && !line;
465 
466  /* select primary VQ table for odd, secondary for even lines */
467  if (mode <= 4)
468  delta_tab = delta[line & 1];
469  else
470  delta_tab = delta[1];
472  code = bytestream_get_byte(data_ptr);
473  if (code < 248) {
474  if (code < delta_tab->num_dyads) {
476  dyad1 = bytestream_get_byte(data_ptr);
477  dyad2 = code;
478  if (dyad1 >= delta_tab->num_dyads || dyad1 >= 248)
479  return IV3_BAD_DATA;
480  } else {
481  /* process QUADS */
482  code -= delta_tab->num_dyads;
483  dyad1 = code / delta_tab->quad_exp;
484  dyad2 = code % delta_tab->quad_exp;
485  if (swap_quads[line & 1])
486  FFSWAP(unsigned int, dyad1, dyad2);
487  }
488  if (mode <= 4) {
490  } else if (mode == 10 && !cell->mv_ptr) {
492  } else {
494  }
495  } else {
496  /* process RLE codes */
497  switch (code) {
498  case RLE_ESC_FC:
499  skip_flag = 0;
500  rle_blocks = 1;
501  code = 253;
502  /* FALLTHROUGH */
503  case RLE_ESC_FF:
504  case RLE_ESC_FE:
505  case RLE_ESC_FD:
506  num_lines = 257 - code - line;
507  if (num_lines <= 0)
508  return IV3_BAD_RLE;
509  if (mode <= 4) {
511  } else if (mode == 10 && !cell->mv_ptr) {
513  }
514  break;
515  case RLE_ESC_FB:
517  code = bytestream_get_byte(data_ptr);
518  rle_blocks = (code & 0x1F) - 1; /* set block counter */
519  if (code >= 64 || rle_blocks < 0)
520  return IV3_BAD_COUNTER;
521  skip_flag = code & 0x20;
522  num_lines = 4 - line; /* enforce next block processing */
523  if (mode >= 10 || (cell->mv_ptr || !skip_flag)) {
524  if (mode <= 4) {
526  } else if (mode == 10 && !cell->mv_ptr) {
528  }
529  }
530  break;
531  case RLE_ESC_F9:
532  skip_flag = 1;
533  rle_blocks = 1;
534  /* FALLTHROUGH */
535  case RLE_ESC_FA:
536  if (line)
537  return IV3_BAD_RLE;
538  num_lines = 4; /* enforce next block processing */
539  if (cell->mv_ptr) {
540  if (mode <= 4) {
542  } else if (mode == 10 && !cell->mv_ptr) {
544  }
545  }
546  break;
547  default:
548  return IV3_UNSUPPORTED;
549  }
550  }
551 
552  line += num_lines;
553  ref += row_offset * (num_lines << v_zoom);
554  dst += row_offset * (num_lines << v_zoom);
555  }
556  }
557 
558  /* move to next horizontal block */
559  block += 4 << h_zoom;
560  ref_block += 4 << h_zoom;
561  }
562 
563  /* move to next line of blocks */
564  ref_block += blk_row_offset;
565  block += blk_row_offset;
566  }
567  return IV3_NOERR;
568 }
569 
570 
571 /**
572  * Decode a vector-quantized cell.
573  * It consists of several routines, each of which handles one or more "modes"
574  * with which a cell can be encoded.
575  *
576  * @param ctx pointer to the decoder context
577  * @param avctx ptr to the AVCodecContext
578  * @param plane pointer to the plane descriptor
579  * @param cell pointer to the cell descriptor
580  * @param data_ptr pointer to the compressed data
581  * @param last_ptr pointer to the last byte to catch reads past end of buffer
582  * @return number of consumed bytes or negative number in case of error
583  */
585  Plane *plane, Cell *cell, const uint8_t *data_ptr,
586  const uint8_t *last_ptr)
587 {
588  int x, mv_x, mv_y, mode, vq_index, prim_indx, second_indx;
589  int zoom_fac;
590  int offset, error = 0, swap_quads[2];
591  uint8_t code, *block, *ref_block = 0;
592  const vqEntry *delta[2];
593  const uint8_t *data_start = data_ptr;
594 
595  /* get coding mode and VQ table index from the VQ descriptor byte */
596  code = *data_ptr++;
597  mode = code >> 4;
598  vq_index = code & 0xF;
599 
600  /* setup output and reference pointers */
601  offset = (cell->ypos << 2) * plane->pitch + (cell->xpos << 2);
602  block = plane->pixels[ctx->buf_sel] + offset;
603 
604  if (!cell->mv_ptr) {
605  /* use previous line as reference for INTRA cells */
606  ref_block = block - plane->pitch;
607  } else if (mode >= 10) {
608  /* for mode 10 and 11 INTER first copy the predicted cell into the current one */
609  /* so we don't need to do data copying for each RLE code later */
610  int ret = copy_cell(ctx, plane, cell);
611  if (ret < 0)
612  return ret;
613  } else {
614  /* set the pointer to the reference pixels for modes 0-4 INTER */
615  mv_y = cell->mv_ptr[0];
616  mv_x = cell->mv_ptr[1];
617 
618  /* -1 because there is an extra line on top for prediction */
619  if ((cell->ypos << 2) + mv_y < -1 || (cell->xpos << 2) + mv_x < 0 ||
620  ((cell->ypos + cell->height) << 2) + mv_y > plane->height ||
621  ((cell->xpos + cell->width) << 2) + mv_x > plane->width) {
622  av_log(ctx->avctx, AV_LOG_ERROR,
623  "Motion vectors point out of the frame.\n");
624  return AVERROR_INVALIDDATA;
625  }
626 
627  offset += mv_y * plane->pitch + mv_x;
628  ref_block = plane->pixels[ctx->buf_sel ^ 1] + offset;
629  }
630 
631  /* select VQ tables as follows: */
632  /* modes 0 and 3 use only the primary table for all lines in a block */
633  /* while modes 1 and 4 switch between primary and secondary tables on alternate lines */
634  if (mode == 1 || mode == 4) {
635  code = ctx->alt_quant[vq_index];
636  prim_indx = (code >> 4) + ctx->cb_offset;
637  second_indx = (code & 0xF) + ctx->cb_offset;
638  } else {
639  vq_index += ctx->cb_offset;
640  prim_indx = second_indx = vq_index;
641  }
642 
643  if (prim_indx >= 24 || second_indx >= 24) {
644  av_log(avctx, AV_LOG_ERROR, "Invalid VQ table indexes! Primary: %d, secondary: %d!\n",
645  prim_indx, second_indx);
646  return AVERROR_INVALIDDATA;
647  }
648 
649  delta[0] = &vq_tab[second_indx];
650  delta[1] = &vq_tab[prim_indx];
651  swap_quads[0] = second_indx >= 16;
652  swap_quads[1] = prim_indx >= 16;
653 
654  /* requantize the prediction if VQ index of this cell differs from VQ index */
655  /* of the predicted cell in order to avoid overflows. */
656  if (vq_index >= 8 && ref_block) {
657  for (x = 0; x < cell->width << 2; x++)
658  ref_block[x] = requant_tab[vq_index & 7][ref_block[x] & 127];
659  }
660 
661  error = IV3_NOERR;
662 
663  switch (mode) {
664  case 0: /*------------------ MODES 0 & 1 (4x4 block processing) --------------------*/
665  case 1:
666  case 3: /*------------------ MODES 3 & 4 (4x8 block processing) --------------------*/
667  case 4:
668  if (mode >= 3 && cell->mv_ptr) {
669  av_log(avctx, AV_LOG_ERROR, "Attempt to apply Mode 3/4 to an INTER cell!\n");
670  return AVERROR_INVALIDDATA;
671  }
672 
673  zoom_fac = mode >= 3;
674  error = decode_cell_data(ctx, cell, block, ref_block, plane->pitch,
675  0, zoom_fac, mode, delta, swap_quads,
676  &data_ptr, last_ptr);
677  break;
678  case 10: /*-------------------- MODE 10 (8x8 block processing) ---------------------*/
679  case 11: /*----------------- MODE 11 (4x8 INTER block processing) ------------------*/
680  if (mode == 10 && !cell->mv_ptr) { /* MODE 10 INTRA processing */
681  error = decode_cell_data(ctx, cell, block, ref_block, plane->pitch,
682  1, 1, mode, delta, swap_quads,
683  &data_ptr, last_ptr);
684  } else { /* mode 10 and 11 INTER processing */
685  if (mode == 11 && !cell->mv_ptr) {
686  av_log(avctx, AV_LOG_ERROR, "Attempt to use Mode 11 for an INTRA cell!\n");
687  return AVERROR_INVALIDDATA;
688  }
689 
690  zoom_fac = mode == 10;
691  error = decode_cell_data(ctx, cell, block, ref_block, plane->pitch,
692  zoom_fac, 1, mode, delta, swap_quads,
693  &data_ptr, last_ptr);
694  }
695  break;
696  default:
697  av_log(avctx, AV_LOG_ERROR, "Unsupported coding mode: %d\n", mode);
698  return AVERROR_INVALIDDATA;
699  }//switch mode
700 
701  switch (error) {
702  case IV3_BAD_RLE:
703  av_log(avctx, AV_LOG_ERROR, "Mode %d: RLE code %X is not allowed at the current line\n",
704  mode, data_ptr[-1]);
705  return AVERROR_INVALIDDATA;
706  case IV3_BAD_DATA:
707  av_log(avctx, AV_LOG_ERROR, "Mode %d: invalid VQ data\n", mode);
708  return AVERROR_INVALIDDATA;
709  case IV3_BAD_COUNTER:
710  av_log(avctx, AV_LOG_ERROR, "Mode %d: RLE-FB invalid counter: %d\n", mode, code);
711  return AVERROR_INVALIDDATA;
712  case IV3_UNSUPPORTED:
713  av_log(avctx, AV_LOG_ERROR, "Mode %d: unsupported RLE code: %X\n", mode, data_ptr[-1]);
714  return AVERROR_INVALIDDATA;
715  case IV3_OUT_OF_DATA:
716  av_log(avctx, AV_LOG_ERROR, "Mode %d: attempt to read past end of buffer\n", mode);
717  return AVERROR_INVALIDDATA;
718  }
719 
720  return data_ptr - data_start; /* report number of bytes consumed from the input buffer */
721 }
722 
723 
724 /* Binary tree codes. */
725 enum {
726  H_SPLIT = 0,
727  V_SPLIT = 1,
729  INTER_DATA = 3
730 };
731 
732 
733 #define SPLIT_CELL(size, new_size) (new_size) = ((size) > 2) ? ((((size) + 2) >> 2) << 1) : 1
734 
735 #define UPDATE_BITPOS(n) \
736  ctx->skip_bits += (n); \
737  ctx->need_resync = 1
738 
739 #define RESYNC_BITSTREAM \
740  if (ctx->need_resync && !(get_bits_count(&ctx->gb) & 7)) { \
741  skip_bits_long(&ctx->gb, ctx->skip_bits); \
742  ctx->skip_bits = 0; \
743  ctx->need_resync = 0; \
744  }
745 
746 #define CHECK_CELL \
747  if (curr_cell.xpos + curr_cell.width > (plane->width >> 2) || \
748  curr_cell.ypos + curr_cell.height > (plane->height >> 2)) { \
749  av_log(avctx, AV_LOG_ERROR, "Invalid cell: x=%d, y=%d, w=%d, h=%d\n", \
750  curr_cell.xpos, curr_cell.ypos, curr_cell.width, curr_cell.height); \
751  return AVERROR_INVALIDDATA; \
752  }
753 
754 
756  Plane *plane, int code, Cell *ref_cell,
757  const int depth, const int strip_width)
758 {
759  Cell curr_cell;
760  int bytes_used, ret;
761 
762  if (depth <= 0) {
763  av_log(avctx, AV_LOG_ERROR, "Stack overflow (corrupted binary tree)!\n");
764  return AVERROR_INVALIDDATA; // unwind recursion
765  }
766 
767  curr_cell = *ref_cell; // clone parent cell
768  if (code == H_SPLIT) {
769  SPLIT_CELL(ref_cell->height, curr_cell.height);
770  ref_cell->ypos += curr_cell.height;
771  ref_cell->height -= curr_cell.height;
772  if (ref_cell->height <= 0 || curr_cell.height <= 0)
773  return AVERROR_INVALIDDATA;
774  } else if (code == V_SPLIT) {
775  if (curr_cell.width > strip_width) {
776  /* split strip */
777  curr_cell.width = (curr_cell.width <= (strip_width << 1) ? 1 : 2) * strip_width;
778  } else
779  SPLIT_CELL(ref_cell->width, curr_cell.width);
780  ref_cell->xpos += curr_cell.width;
781  ref_cell->width -= curr_cell.width;
782  if (ref_cell->width <= 0 || curr_cell.width <= 0)
783  return AVERROR_INVALIDDATA;
784  }
785 
786  while (get_bits_left(&ctx->gb) >= 2) { /* loop until return */
788  switch (code = get_bits(&ctx->gb, 2)) {
789  case H_SPLIT:
790  case V_SPLIT:
791  if (parse_bintree(ctx, avctx, plane, code, &curr_cell, depth - 1, strip_width))
792  return AVERROR_INVALIDDATA;
793  break;
794  case INTRA_NULL:
795  if (!curr_cell.tree) { /* MC tree INTRA code */
796  curr_cell.mv_ptr = 0; /* mark the current strip as INTRA */
797  curr_cell.tree = 1; /* enter the VQ tree */
798  } else { /* VQ tree NULL code */
800  code = get_bits(&ctx->gb, 2);
801  if (code >= 2) {
802  av_log(avctx, AV_LOG_ERROR, "Invalid VQ_NULL code: %d\n", code);
803  return AVERROR_INVALIDDATA;
804  }
805  if (code == 1)
806  av_log(avctx, AV_LOG_ERROR, "SkipCell procedure not implemented yet!\n");
807 
808  CHECK_CELL
809  if (!curr_cell.mv_ptr)
810  return AVERROR_INVALIDDATA;
811 
812  ret = copy_cell(ctx, plane, &curr_cell);
813  return ret;
814  }
815  break;
816  case INTER_DATA:
817  if (!curr_cell.tree) { /* MC tree INTER code */
818  unsigned mv_idx;
819  /* get motion vector index and setup the pointer to the mv set */
820  if (!ctx->need_resync)
821  ctx->next_cell_data = &ctx->gb.buffer[(get_bits_count(&ctx->gb) + 7) >> 3];
822  if (ctx->next_cell_data >= ctx->last_byte) {
823  av_log(avctx, AV_LOG_ERROR, "motion vector out of array\n");
824  return AVERROR_INVALIDDATA;
825  }
826  mv_idx = *(ctx->next_cell_data++);
827  if (mv_idx >= ctx->num_vectors) {
828  av_log(avctx, AV_LOG_ERROR, "motion vector index out of range\n");
829  return AVERROR_INVALIDDATA;
830  }
831  curr_cell.mv_ptr = &ctx->mc_vectors[mv_idx << 1];
832  curr_cell.tree = 1; /* enter the VQ tree */
833  UPDATE_BITPOS(8);
834  } else { /* VQ tree DATA code */
835  if (!ctx->need_resync)
836  ctx->next_cell_data = &ctx->gb.buffer[(get_bits_count(&ctx->gb) + 7) >> 3];
837 
838  CHECK_CELL
839  bytes_used = decode_cell(ctx, avctx, plane, &curr_cell,
840  ctx->next_cell_data, ctx->last_byte);
841  if (bytes_used < 0)
842  return AVERROR_INVALIDDATA;
843 
844  UPDATE_BITPOS(bytes_used << 3);
845  ctx->next_cell_data += bytes_used;
846  return 0;
847  }
848  break;
849  }
850  }//while
851 
852  return AVERROR_INVALIDDATA;
853 }
854 
855 
857  Plane *plane, const uint8_t *data, int32_t data_size,
858  int32_t strip_width)
859 {
860  Cell curr_cell;
861  unsigned num_vectors;
862 
863  /* each plane data starts with mc_vector_count field, */
864  /* an optional array of motion vectors followed by the vq data */
865  num_vectors = bytestream_get_le32(&data); data_size -= 4;
866  if (num_vectors > 256) {
867  av_log(ctx->avctx, AV_LOG_ERROR,
868  "Read invalid number of motion vectors %d\n", num_vectors);
869  return AVERROR_INVALIDDATA;
870  }
871  if (num_vectors * 2 > data_size)
872  return AVERROR_INVALIDDATA;
873 
874  ctx->num_vectors = num_vectors;
875  ctx->mc_vectors = num_vectors ? data : 0;
876 
877  /* init the bitreader */
878  init_get_bits(&ctx->gb, &data[num_vectors * 2], (data_size - num_vectors * 2) << 3);
879  ctx->skip_bits = 0;
880  ctx->need_resync = 0;
881 
882  ctx->last_byte = data + data_size;
883 
884  /* initialize the 1st cell and set its dimensions to whole plane */
885  curr_cell.xpos = curr_cell.ypos = 0;
886  curr_cell.width = plane->width >> 2;
887  curr_cell.height = plane->height >> 2;
888  curr_cell.tree = 0; // we are in the MC tree now
889  curr_cell.mv_ptr = 0; // no motion vector = INTRA cell
890 
891  return parse_bintree(ctx, avctx, plane, INTRA_NULL, &curr_cell, CELL_STACK_MAX, strip_width);
892 }
893 
894 
895 #define OS_HDR_ID MKBETAG('F', 'R', 'M', 'H')
896 
898  const uint8_t *buf, int buf_size)
899 {
900  GetByteContext gb;
901  const uint8_t *bs_hdr;
902  uint32_t frame_num, word2, check_sum, data_size;
903  int y_offset, u_offset, v_offset;
904  uint32_t starts[3], ends[3];
905  uint16_t height, width;
906  int i, j;
907 
908  bytestream2_init(&gb, buf, buf_size);
909 
910  /* parse and check the OS header */
911  frame_num = bytestream2_get_le32(&gb);
912  word2 = bytestream2_get_le32(&gb);
913  check_sum = bytestream2_get_le32(&gb);
914  data_size = bytestream2_get_le32(&gb);
915 
916  if ((frame_num ^ word2 ^ data_size ^ OS_HDR_ID) != check_sum) {
917  av_log(avctx, AV_LOG_ERROR, "OS header checksum mismatch!\n");
918  return AVERROR_INVALIDDATA;
919  }
920 
921  /* parse the bitstream header */
922  bs_hdr = gb.buffer;
923 
924  if (bytestream2_get_le16(&gb) != 32) {
925  av_log(avctx, AV_LOG_ERROR, "Unsupported codec version!\n");
926  return AVERROR_INVALIDDATA;
927  }
928 
929  ctx->frame_num = frame_num;
930  ctx->frame_flags = bytestream2_get_le16(&gb);
931  ctx->data_size = (bytestream2_get_le32(&gb) + 7) >> 3;
932  ctx->cb_offset = bytestream2_get_byte(&gb);
933 
934  if (ctx->data_size == 16)
935  return 4;
936  ctx->data_size = FFMIN(ctx->data_size, buf_size - 16);
937 
938  bytestream2_skip(&gb, 3); // skip reserved byte and checksum
939 
940  /* check frame dimensions */
941  height = bytestream2_get_le16(&gb);
942  width = bytestream2_get_le16(&gb);
943  if (av_image_check_size(width, height, 0, avctx))
944  return AVERROR_INVALIDDATA;
945 
946  if (width != ctx->width || height != ctx->height) {
947  int res;
948 
949  ff_dlog(avctx, "Frame dimensions changed!\n");
950 
951  if (width < 16 || width > 640 ||
952  height < 16 || height > 480 ||
953  width & 3 || height & 3) {
954  av_log(avctx, AV_LOG_ERROR,
955  "Invalid picture dimensions: %d x %d!\n", width, height);
956  return AVERROR_INVALIDDATA;
957  }
959  if ((res = allocate_frame_buffers(ctx, avctx, width, height)) < 0)
960  return res;
961  if ((res = ff_set_dimensions(avctx, width, height)) < 0)
962  return res;
963  }
964 
965  y_offset = bytestream2_get_le32(&gb);
966  v_offset = bytestream2_get_le32(&gb);
967  u_offset = bytestream2_get_le32(&gb);
968  bytestream2_skip(&gb, 4);
969 
970  /* unfortunately there is no common order of planes in the buffer */
971  /* so we use that sorting algo for determining planes data sizes */
972  starts[0] = y_offset;
973  starts[1] = v_offset;
974  starts[2] = u_offset;
975 
976  for (j = 0; j < 3; j++) {
977  ends[j] = ctx->data_size;
978  for (i = 2; i >= 0; i--)
979  if (starts[i] < ends[j] && starts[i] > starts[j])
980  ends[j] = starts[i];
981  }
982 
983  ctx->y_data_size = ends[0] - starts[0];
984  ctx->v_data_size = ends[1] - starts[1];
985  ctx->u_data_size = ends[2] - starts[2];
986  if (FFMIN3(y_offset, v_offset, u_offset) < 0 ||
987  FFMAX3(y_offset, v_offset, u_offset) >= ctx->data_size - 16 ||
988  FFMIN3(y_offset, v_offset, u_offset) < gb.buffer - bs_hdr + 16 ||
989  FFMIN3(ctx->y_data_size, ctx->v_data_size, ctx->u_data_size) <= 0) {
990  av_log(avctx, AV_LOG_ERROR, "One of the y/u/v offsets is invalid\n");
991  return AVERROR_INVALIDDATA;
992  }
993 
994  ctx->y_data_ptr = bs_hdr + y_offset;
995  ctx->v_data_ptr = bs_hdr + v_offset;
996  ctx->u_data_ptr = bs_hdr + u_offset;
997  ctx->alt_quant = gb.buffer;
998 
999  if (ctx->data_size == 16) {
1000  av_log(avctx, AV_LOG_DEBUG, "Sync frame encountered!\n");
1001  return 16;
1002  }
1003 
1004  if (ctx->frame_flags & BS_8BIT_PEL) {
1005  avpriv_request_sample(avctx, "8-bit pixel format");
1006  return AVERROR_PATCHWELCOME;
1007  }
1008 
1009  if (ctx->frame_flags & BS_MV_X_HALF || ctx->frame_flags & BS_MV_Y_HALF) {
1010  avpriv_request_sample(avctx, "Halfpel motion vectors");
1011  return AVERROR_PATCHWELCOME;
1012  }
1013 
1014  return 0;
1015 }
1016 
1017 
1018 /**
1019  * Convert and output the current plane.
1020  * All pixel values will be upsampled by shifting right by one bit.
1021  *
1022  * @param[in] plane pointer to the descriptor of the plane being processed
1023  * @param[in] buf_sel indicates which frame buffer the input data stored in
1024  * @param[out] dst pointer to the buffer receiving converted pixels
1025  * @param[in] dst_pitch pitch for moving to the next y line
1026  * @param[in] dst_height output plane height
1027  */
1028 static void output_plane(const Plane *plane, int buf_sel, uint8_t *dst,
1029  ptrdiff_t dst_pitch, int dst_height)
1030 {
1031  int x,y;
1032  const uint8_t *src = plane->pixels[buf_sel];
1033  ptrdiff_t pitch = plane->pitch;
1034 
1035  dst_height = FFMIN(dst_height, plane->height);
1036  for (y = 0; y < dst_height; y++) {
1037  /* convert four pixels at once using SWAR */
1038  for (x = 0; x < plane->width >> 2; x++) {
1039  AV_WN32A(dst, (AV_RN32A(src) & 0x7F7F7F7F) << 1);
1040  src += 4;
1041  dst += 4;
1042  }
1043 
1044  for (x <<= 2; x < plane->width; x++)
1045  *dst++ = *src++ << 1;
1046 
1047  src += pitch - plane->width;
1048  dst += dst_pitch - plane->width;
1049  }
1050 }
1051 
1052 
1054 {
1055  Indeo3DecodeContext *ctx = avctx->priv_data;
1056 
1057  ctx->avctx = avctx;
1058  avctx->pix_fmt = AV_PIX_FMT_YUV410P;
1059 
1061 
1062  ff_hpeldsp_init(&ctx->hdsp, avctx->flags);
1063 
1064  return allocate_frame_buffers(ctx, avctx, avctx->width, avctx->height);
1065 }
1066 
1067 
1068 static int decode_frame(AVCodecContext *avctx, void *data, int *got_frame,
1069  AVPacket *avpkt)
1070 {
1071  Indeo3DecodeContext *ctx = avctx->priv_data;
1072  const uint8_t *buf = avpkt->data;
1073  int buf_size = avpkt->size;
1074  AVFrame *frame = data;
1075  int res;
1076 
1077  res = decode_frame_headers(ctx, avctx, buf, buf_size);
1078  if (res < 0)
1079  return res;
1080 
1081  /* skip sync(null) frames */
1082  if (res) {
1083  // we have processed 16 bytes but no data was decoded
1084  *got_frame = 0;
1085  return buf_size;
1086  }
1087 
1088  /* skip droppable INTER frames if requested */
1089  if (ctx->frame_flags & BS_NONREF &&
1090  (avctx->skip_frame >= AVDISCARD_NONREF))
1091  return 0;
1092 
1093  /* skip INTER frames if requested */
1094  if (!(ctx->frame_flags & BS_KEYFRAME) && avctx->skip_frame >= AVDISCARD_NONKEY)
1095  return 0;
1096 
1097  /* use BS_BUFFER flag for buffer switching */
1098  ctx->buf_sel = (ctx->frame_flags >> BS_BUFFER) & 1;
1099 
1100  if ((res = ff_get_buffer(avctx, frame, 0)) < 0)
1101  return res;
1102 
1103  /* decode luma plane */
1104  if ((res = decode_plane(ctx, avctx, ctx->planes, ctx->y_data_ptr, ctx->y_data_size, 40)))
1105  return res;
1106 
1107  /* decode chroma planes */
1108  if ((res = decode_plane(ctx, avctx, &ctx->planes[1], ctx->u_data_ptr, ctx->u_data_size, 10)))
1109  return res;
1110 
1111  if ((res = decode_plane(ctx, avctx, &ctx->planes[2], ctx->v_data_ptr, ctx->v_data_size, 10)))
1112  return res;
1113 
1114  output_plane(&ctx->planes[0], ctx->buf_sel,
1115  frame->data[0], frame->linesize[0],
1116  avctx->height);
1117  output_plane(&ctx->planes[1], ctx->buf_sel,
1118  frame->data[1], frame->linesize[1],
1119  (avctx->height + 3) >> 2);
1120  output_plane(&ctx->planes[2], ctx->buf_sel,
1121  frame->data[2], frame->linesize[2],
1122  (avctx->height + 3) >> 2);
1123 
1124  *got_frame = 1;
1125 
1126  return buf_size;
1127 }
1128 
1129 
1131 {
1132  free_frame_buffers(avctx->priv_data);
1133 
1134  return 0;
1135 }
1136 
1138  .name = "indeo3",
1139  .long_name = NULL_IF_CONFIG_SMALL("Intel Indeo 3"),
1140  .type = AVMEDIA_TYPE_VIDEO,
1141  .id = AV_CODEC_ID_INDEO3,
1142  .priv_data_size = sizeof(Indeo3DecodeContext),
1143  .init = decode_init,
1144  .close = decode_close,
1145  .decode = decode_frame,
1146  .capabilities = AV_CODEC_CAP_DR1,
1147  .caps_internal = FF_CODEC_CAP_INIT_CLEANUP,
1148 };
#define av_cold
Definition: attributes.h:88
uint8_t
int32_t
Libavcodec external API header.
static av_cold int init(AVCodecContext *avctx)
Definition: avrndec.c:31
static av_always_inline void bytestream2_init(GetByteContext *g, const uint8_t *buf, int buf_size)
Definition: bytestream.h:137
static av_always_inline void bytestream2_skip(GetByteContext *g, unsigned int size)
Definition: bytestream.h:168
#define FFMAX3(a, b, c)
Definition: common.h:104
#define FFSWAP(type, a, b)
Definition: common.h:108
#define FFMIN(a, b)
Definition: common.h:105
#define FFMIN3(a, b, c)
Definition: common.h:106
int ff_get_buffer(AVCodecContext *avctx, AVFrame *frame, int flags)
Get a buffer for a frame.
Definition: decode.c:1900
static void decode(AVCodecContext *dec_ctx, AVPacket *pkt, AVFrame *frame, FILE *outfile)
Definition: decode_audio.c:71
static AVFrame * frame
mode
Use these values in ebur128_init (or'ed).
Definition: ebur128.h:83
bitstream reader API header.
static int get_bits_left(GetBitContext *gb)
Definition: get_bits.h:849
static int get_bits_count(const GetBitContext *s)
Definition: get_bits.h:219
static unsigned int get_bits(GetBitContext *s, int n)
Read 1-25 bits.
Definition: get_bits.h:379
static int init_get_bits(GetBitContext *s, const uint8_t *buffer, int bit_size)
Initialize GetBitContext.
Definition: get_bits.h:659
#define AV_CODEC_CAP_DR1
Codec uses get_buffer() or get_encode_buffer() for allocating buffers and supports custom allocators.
Definition: codec.h:52
@ AV_CODEC_ID_INDEO3
Definition: codec_id.h:77
@ AVDISCARD_NONKEY
discard all frames except keyframes
Definition: avcodec.h:235
@ AVDISCARD_NONREF
discard all non reference
Definition: avcodec.h:232
#define AVERROR_PATCHWELCOME
Not yet implemented in FFmpeg, patches welcome.
Definition: error.h:62
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:59
#define AVERROR(e)
Definition: error.h:43
#define AV_LOG_DEBUG
Stuff which is only useful for libav* developers.
Definition: log.h:215
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:194
@ AVMEDIA_TYPE_VIDEO
Definition: avutil.h:201
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:317
static const int offsets[]
Definition: hevc_pel.c:34
av_cold void ff_hpeldsp_init(HpelDSPContext *c, int flags)
Definition: hpeldsp.c:338
misc image utilities
#define SPLIT_CELL(size, new_size)
Definition: indeo3.c:733
#define BUFFER_PRECHECK
Definition: indeo3.c:342
@ RLE_ESC_FE
apply null delta to all lines up to the 3rd line
Definition: indeo3.c:50
@ RLE_ESC_F9
same as RLE_ESC_FA + do the same with next block
Definition: indeo3.c:45
@ RLE_ESC_FF
apply null delta to all lines up to the 2nd line
Definition: indeo3.c:51
@ RLE_ESC_FB
apply null delta to N blocks / skip N blocks
Definition: indeo3.c:47
@ RLE_ESC_FD
apply null delta to all remaining lines of this block
Definition: indeo3.c:49
@ RLE_ESC_FA
INTRA: skip block, INTER: copy data from reference.
Definition: indeo3.c:46
@ RLE_ESC_FC
same as RLE_ESC_FD + do the same with next block
Definition: indeo3.c:48
#define BS_BUFFER
indicates which of two frame buffers should be used
Definition: indeo3.c:61
#define RLE_BLOCK_COPY
Definition: indeo3.c:346
#define RLE_BLOCK_COPY_8
Definition: indeo3.c:350
#define BS_8BIT_PEL
8-bit pixel bitdepth indicator
Definition: indeo3.c:56
static void output_plane(const Plane *plane, int buf_sel, uint8_t *dst, ptrdiff_t dst_pitch, int dst_height)
Convert and output the current plane.
Definition: indeo3.c:1028
#define BS_NONREF
nonref (discardable) frame indicator
Definition: indeo3.c:60
#define OS_HDR_ID
Definition: indeo3.c:895
static av_cold int decode_close(AVCodecContext *avctx)
Definition: indeo3.c:1130
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:755
#define RESYNC_BITSTREAM
Definition: indeo3.c:739
#define CHECK_CELL
Definition: indeo3.c:746
@ IV3_NOERR
Definition: indeo3.c:333
@ IV3_BAD_DATA
Definition: indeo3.c:335
@ IV3_OUT_OF_DATA
Definition: indeo3.c:338
@ IV3_BAD_COUNTER
Definition: indeo3.c:336
@ IV3_UNSUPPORTED
Definition: indeo3.c:337
@ IV3_BAD_RLE
Definition: indeo3.c:334
AVCodec ff_indeo3_decoder
Definition: indeo3.c: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:584
static av_cold int decode_init(AVCodecContext *avctx)
Definition: indeo3.c:1053
#define BS_MV_Y_HALF
vertical mv halfpel resolution indicator
Definition: indeo3.c:58
static uint8_t requant_tab[8][128]
Definition: indeo3.c:112
#define APPLY_DELTA_1011_INTER
Definition: indeo3.c:406
@ V_SPLIT
Definition: indeo3.c:727
@ INTRA_NULL
Definition: indeo3.c:728
@ H_SPLIT
Definition: indeo3.c:726
@ INTER_DATA
Definition: indeo3.c:729
static int decode_cell_data(Indeo3DecodeContext *ctx, Cell *cell, uint8_t *block, uint8_t *ref_block, ptrdiff_t row_offset, 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:428
#define RLE_LINES_COPY
Definition: indeo3.c:359
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:856
static av_cold void free_frame_buffers(Indeo3DecodeContext *ctx)
Definition: indeo3.c:151
#define UPDATE_BITPOS(n)
Definition: indeo3.c:735
static av_cold int allocate_frame_buffers(Indeo3DecodeContext *ctx, AVCodecContext *avctx, int luma_width, int luma_height)
Definition: indeo3.c:165
#define RLE_LINES_COPY_M10
Definition: indeo3.c:362
#define BS_MV_X_HALF
horizontal mv halfpel resolution indicator
Definition: indeo3.c:59
static int decode_frame(AVCodecContext *avctx, void *data, int *got_frame, AVPacket *avpkt)
Definition: indeo3.c:1068
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,...
Definition: indeo3.c:234
static uint32_t replicate32(uint32_t a)
Definition: indeo3.c:310
#define APPLY_DELTA_8
Definition: indeo3.c:384
#define CELL_STACK_MAX
Definition: indeo3.c:72
static int decode_frame_headers(Indeo3DecodeContext *ctx, AVCodecContext *avctx, const uint8_t *buf, int buf_size)
Definition: indeo3.c:897
static av_cold void build_requant_tab(void)
Definition: indeo3.c:119
static void fill_64(uint8_t *dst, const uint64_t pix, int32_t n, int32_t row_offset)
Definition: indeo3.c:323
#define BS_KEYFRAME
intra frame indicator
Definition: indeo3.c:57
#define APPLY_DELTA_4
Definition: indeo3.c:371
static uint64_t replicate64(uint64_t a)
Definition: indeo3.c:299
static const vqEntry vq_tab[24]
Definition: indeo3data.h:330
int i
Definition: input.c:407
#define AV_WN32A(p, v)
Definition: intreadwrite.h:538
#define AV_RN32A(p)
Definition: intreadwrite.h:526
#define AV_WN64A(p, v)
Definition: intreadwrite.h:542
#define FF_CODEC_CAP_INIT_CLEANUP
The codec allows calling the close function for deallocation even if the init function returned a fai...
Definition: internal.h:49
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:84
common internal API header
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification.
Definition: internal.h:117
uint8_t w
Definition: llviddspenc.c:39
#define FFALIGN(x, a)
Definition: macros.h:48
const char data[16]
Definition: mxf.c:142
@ AV_PIX_FMT_YUV410P
planar YUV 4:1:0, 9bpp, (1 Cr & Cb sample per 4x4 Y samples)
Definition: pixfmt.h:72
const uint8_t * code
Definition: spdifenc.c:413
main external API structure.
Definition: avcodec.h:536
enum AVPixelFormat pix_fmt
Pixel format, see AV_PIX_FMT_xxx.
Definition: avcodec.h:746
int width
picture width / height.
Definition: avcodec.h:709
int flags
AV_CODEC_FLAG_*.
Definition: avcodec.h:616
void * priv_data
Definition: avcodec.h:563
enum AVDiscard skip_frame
Skip decoding for selected frames.
Definition: avcodec.h:2010
AVCodec.
Definition: codec.h:197
const char * name
Name of the codec implementation.
Definition: codec.h:204
This structure describes decoded (raw) audio or video data.
Definition: frame.h:318
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
Definition: frame.h:332
int linesize[AV_NUM_DATA_POINTERS]
For video, size in bytes of each picture line.
Definition: frame.h:349
This structure stores compressed data.
Definition: packet.h:346
int size
Definition: packet.h:370
uint8_t * data
Definition: packet.h:369
Definition: indeo3.c:74
const int8_t * mv_ptr
ptr to the motion vector if any
Definition: indeo3.c:80
int16_t height
cell height in 4x4 blocks
Definition: indeo3.c:78
int16_t width
cell width in 4x4 blocks
Definition: indeo3.c:77
uint8_t tree
tree id: 0- MC tree, 1 - VQ tree
Definition: indeo3.c:79
int16_t xpos
cell coordinates in 4x4 blocks
Definition: indeo3.c:75
int16_t ypos
Definition: indeo3.c:76
const uint8_t * buffer
Definition: bytestream.h:34
Half-pel DSP context.
Definition: hpeldsp.h:45
Plane planes[3]
Definition: indeo3.c:108
uint16_t frame_flags
frame properties
Definition: indeo3.c:98
uint32_t frame_num
current frame number (zero-based)
Definition: indeo3.c:96
int16_t width
Definition: indeo3.c:95
GetBitContext gb
Definition: indeo3.c:87
AVCodecContext * avctx
Definition: indeo3.c:84
const uint8_t * u_data_ptr
Definition: indeo3.c:103
const uint8_t * y_data_ptr
Definition: indeo3.c:101
uint8_t cb_offset
needed for selecting VQ tables
Definition: indeo3.c:99
HpelDSPContext hdsp
Definition: indeo3.c:85
unsigned num_vectors
number of motion vectors in mc_vectors
Definition: indeo3.c:93
int32_t v_data_size
Definition: indeo3.c:105
const uint8_t * v_data_ptr
Definition: indeo3.c:102
int data_size
size of the frame data in bytes
Definition: indeo3.c:97
const uint8_t * next_cell_data
Definition: indeo3.c:90
uint8_t buf_sel
active frame buffer: 0 - primary, 1 -secondary
Definition: indeo3.c:100
const uint8_t * alt_quant
secondary VQ table set for the modes 1 and 4
Definition: indeo3.c:107
int32_t y_data_size
Definition: indeo3.c:104
const uint8_t * last_byte
Definition: indeo3.c:91
int32_t u_data_size
Definition: indeo3.c:106
const int8_t * mc_vectors
Definition: indeo3.c:92
int16_t height
Definition: indeo3.c:95
Definition: cfhd.h:120
uint8_t * pixels[2]
pointer to the actual pixel data of the buffers above
Definition: indeo3.c:66
int width
Definition: cfhd.h:121
uint32_t width
Definition: indeo3.c:67
uint8_t * buffers[2]
Definition: indeo3.c:65
int height
Definition: cfhd.h:122
ptrdiff_t pitch
Definition: indeo3.c:69
uint32_t height
Definition: indeo3.c:68
In the ELBG jargon, a cell is the set of points that are closest to a codebook entry.
Definition: elbg.c:39
Definition: graph2dot.c:48
uint8_t num_dyads
number of two-pixel deltas
Definition: indeo3data.h:326
uint8_t quad_exp
log2 of four-pixel deltas
Definition: indeo3data.h:327
#define ff_dlog(a,...)
#define avpriv_request_sample(...)
#define av_freep(p)
#define av_malloc(s)
#define av_log(a,...)
static void error(const char *err)
#define src
Definition: vp8dsp.c:255
static int16_t block[64]
Definition: dct.c:116
static int ref[MAX_W *MAX_W]
Definition: jpeg2000dwt.c:107
AVFormatContext * ctx
Definition: movenc.c:48
#define height
#define width
static const uint8_t offset[127][2]
Definition: vf_spp.c:107
float delta