truemotion1.c
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1 /*
2  * Duck TrueMotion 1.0 Decoder
3  * Copyright (C) 2003 Alex Beregszaszi & Mike Melanson
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 <stdio.h>
33 #include <stdlib.h>
34 #include <string.h>
35 
36 #include "avcodec.h"
37 #include "dsputil.h"
38 #include "libavutil/imgutils.h"
39 #include "libavutil/internal.h"
40 #include "libavutil/mem.h"
41 
42 #include "truemotion1data.h"
43 
44 typedef struct TrueMotion1Context {
47 
48  const uint8_t *buf;
49  int size;
50 
55 
56  int flags;
57  int x, y, w, h;
58 
59  uint32_t y_predictor_table[1024];
60  uint32_t c_predictor_table[1024];
61  uint32_t fat_y_predictor_table[1024];
62  uint32_t fat_c_predictor_table[1024];
63 
68 
69  int16_t ydt[8];
70  int16_t cdt[8];
71  int16_t fat_ydt[8];
72  int16_t fat_cdt[8];
73 
75 
76  unsigned int *vert_pred;
78 
80 
81 #define FLAG_SPRITE 32
82 #define FLAG_KEYFRAME 16
83 #define FLAG_INTERFRAME 8
84 #define FLAG_INTERPOLATED 4
85 
86 struct frame_header {
91  uint16_t ysize;
92  uint16_t xsize;
93  uint16_t checksum;
98  uint16_t xoffset;
99  uint16_t yoffset;
100  uint16_t width;
101  uint16_t height;
102 };
103 
104 #define ALGO_NOP 0
105 #define ALGO_RGB16V 1
106 #define ALGO_RGB16H 2
107 #define ALGO_RGB24H 3
108 
109 /* these are the various block sizes that can occupy a 4x4 block */
110 #define BLOCK_2x2 0
111 #define BLOCK_2x4 1
112 #define BLOCK_4x2 2
113 #define BLOCK_4x4 3
114 
115 typedef struct comp_types {
117  int block_width; // vres
118  int block_height; // hres
120 } comp_types;
121 
122 /* { valid for metatype }, algorithm, num of deltas, vert res, horiz res */
123 static const comp_types compression_types[17] = {
124  { ALGO_NOP, 0, 0, 0 },
125 
126  { ALGO_RGB16V, 4, 4, BLOCK_4x4 },
127  { ALGO_RGB16H, 4, 4, BLOCK_4x4 },
128  { ALGO_RGB16V, 4, 2, BLOCK_4x2 },
129  { ALGO_RGB16H, 4, 2, BLOCK_4x2 },
130 
131  { ALGO_RGB16V, 2, 4, BLOCK_2x4 },
132  { ALGO_RGB16H, 2, 4, BLOCK_2x4 },
133  { ALGO_RGB16V, 2, 2, BLOCK_2x2 },
134  { ALGO_RGB16H, 2, 2, BLOCK_2x2 },
135 
136  { ALGO_NOP, 4, 4, BLOCK_4x4 },
137  { ALGO_RGB24H, 4, 4, BLOCK_4x4 },
138  { ALGO_NOP, 4, 2, BLOCK_4x2 },
139  { ALGO_RGB24H, 4, 2, BLOCK_4x2 },
140 
141  { ALGO_NOP, 2, 4, BLOCK_2x4 },
142  { ALGO_RGB24H, 2, 4, BLOCK_2x4 },
143  { ALGO_NOP, 2, 2, BLOCK_2x2 },
144  { ALGO_RGB24H, 2, 2, BLOCK_2x2 }
145 };
146 
147 static void select_delta_tables(TrueMotion1Context *s, int delta_table_index)
148 {
149  int i;
150 
151  if (delta_table_index > 3)
152  return;
153 
154  memcpy(s->ydt, ydts[delta_table_index], 8 * sizeof(int16_t));
155  memcpy(s->cdt, cdts[delta_table_index], 8 * sizeof(int16_t));
156  memcpy(s->fat_ydt, fat_ydts[delta_table_index], 8 * sizeof(int16_t));
157  memcpy(s->fat_cdt, fat_cdts[delta_table_index], 8 * sizeof(int16_t));
158 
159  /* Y skinny deltas need to be halved for some reason; maybe the
160  * skinny Y deltas should be modified */
161  for (i = 0; i < 8; i++)
162  {
163  /* drop the lsb before dividing by 2-- net effect: round down
164  * when dividing a negative number (e.g., -3/2 = -2, not -1) */
165  s->ydt[i] &= 0xFFFE;
166  s->ydt[i] /= 2;
167  }
168 }
169 
170 #if HAVE_BIGENDIAN
171 static int make_ydt15_entry(int p2, int p1, int16_t *ydt)
172 #else
173 static int make_ydt15_entry(int p1, int p2, int16_t *ydt)
174 #endif
175 {
176  int lo, hi;
177 
178  lo = ydt[p1];
179  lo += (lo << 5) + (lo << 10);
180  hi = ydt[p2];
181  hi += (hi << 5) + (hi << 10);
182  return (lo + (hi << 16)) << 1;
183 }
184 
185 static int make_cdt15_entry(int p1, int p2, int16_t *cdt)
186 {
187  int r, b, lo;
188 
189  b = cdt[p2];
190  r = cdt[p1] << 10;
191  lo = b + r;
192  return (lo + (lo << 16)) << 1;
193 }
194 
195 #if HAVE_BIGENDIAN
196 static int make_ydt16_entry(int p2, int p1, int16_t *ydt)
197 #else
198 static int make_ydt16_entry(int p1, int p2, int16_t *ydt)
199 #endif
200 {
201  int lo, hi;
202 
203  lo = ydt[p1];
204  lo += (lo << 6) + (lo << 11);
205  hi = ydt[p2];
206  hi += (hi << 6) + (hi << 11);
207  return (lo + (hi << 16)) << 1;
208 }
209 
210 static int make_cdt16_entry(int p1, int p2, int16_t *cdt)
211 {
212  int r, b, lo;
213 
214  b = cdt[p2];
215  r = cdt[p1] << 11;
216  lo = b + r;
217  return (lo + (lo << 16)) << 1;
218 }
219 
220 static int make_ydt24_entry(int p1, int p2, int16_t *ydt)
221 {
222  int lo, hi;
223 
224  lo = ydt[p1];
225  hi = ydt[p2];
226  return (lo + (hi << 8) + (hi << 16)) << 1;
227 }
228 
229 static int make_cdt24_entry(int p1, int p2, int16_t *cdt)
230 {
231  int r, b;
232 
233  b = cdt[p2];
234  r = cdt[p1]<<16;
235  return (b+r) << 1;
236 }
237 
238 static void gen_vector_table15(TrueMotion1Context *s, const uint8_t *sel_vector_table)
239 {
240  int len, i, j;
241  unsigned char delta_pair;
242 
243  for (i = 0; i < 1024; i += 4)
244  {
245  len = *sel_vector_table++ / 2;
246  for (j = 0; j < len; j++)
247  {
248  delta_pair = *sel_vector_table++;
249  s->y_predictor_table[i+j] = 0xfffffffe &
250  make_ydt15_entry(delta_pair >> 4, delta_pair & 0xf, s->ydt);
251  s->c_predictor_table[i+j] = 0xfffffffe &
252  make_cdt15_entry(delta_pair >> 4, delta_pair & 0xf, s->cdt);
253  }
254  s->y_predictor_table[i+(j-1)] |= 1;
255  s->c_predictor_table[i+(j-1)] |= 1;
256  }
257 }
258 
259 static void gen_vector_table16(TrueMotion1Context *s, const uint8_t *sel_vector_table)
260 {
261  int len, i, j;
262  unsigned char delta_pair;
263 
264  for (i = 0; i < 1024; i += 4)
265  {
266  len = *sel_vector_table++ / 2;
267  for (j = 0; j < len; j++)
268  {
269  delta_pair = *sel_vector_table++;
270  s->y_predictor_table[i+j] = 0xfffffffe &
271  make_ydt16_entry(delta_pair >> 4, delta_pair & 0xf, s->ydt);
272  s->c_predictor_table[i+j] = 0xfffffffe &
273  make_cdt16_entry(delta_pair >> 4, delta_pair & 0xf, s->cdt);
274  }
275  s->y_predictor_table[i+(j-1)] |= 1;
276  s->c_predictor_table[i+(j-1)] |= 1;
277  }
278 }
279 
280 static void gen_vector_table24(TrueMotion1Context *s, const uint8_t *sel_vector_table)
281 {
282  int len, i, j;
283  unsigned char delta_pair;
284 
285  for (i = 0; i < 1024; i += 4)
286  {
287  len = *sel_vector_table++ / 2;
288  for (j = 0; j < len; j++)
289  {
290  delta_pair = *sel_vector_table++;
291  s->y_predictor_table[i+j] = 0xfffffffe &
292  make_ydt24_entry(delta_pair >> 4, delta_pair & 0xf, s->ydt);
293  s->c_predictor_table[i+j] = 0xfffffffe &
294  make_cdt24_entry(delta_pair >> 4, delta_pair & 0xf, s->cdt);
295  s->fat_y_predictor_table[i+j] = 0xfffffffe &
296  make_ydt24_entry(delta_pair >> 4, delta_pair & 0xf, s->fat_ydt);
297  s->fat_c_predictor_table[i+j] = 0xfffffffe &
298  make_cdt24_entry(delta_pair >> 4, delta_pair & 0xf, s->fat_cdt);
299  }
300  s->y_predictor_table[i+(j-1)] |= 1;
301  s->c_predictor_table[i+(j-1)] |= 1;
302  s->fat_y_predictor_table[i+(j-1)] |= 1;
303  s->fat_c_predictor_table[i+(j-1)] |= 1;
304  }
305 }
306 
307 /* Returns the number of bytes consumed from the bytestream. Returns -1 if
308  * there was an error while decoding the header */
310 {
311  int i;
312  int width_shift = 0;
313  int new_pix_fmt;
314  struct frame_header header;
315  uint8_t header_buffer[128] = { 0 }; /* logical maximum size of the header */
316  const uint8_t *sel_vector_table;
317 
318  header.header_size = ((s->buf[0] >> 5) | (s->buf[0] << 3)) & 0x7f;
319  if (s->buf[0] < 0x10)
320  {
321  av_log(s->avctx, AV_LOG_ERROR, "invalid header size (%d)\n", s->buf[0]);
322  return -1;
323  }
324 
325  /* unscramble the header bytes with a XOR operation */
326  for (i = 1; i < header.header_size; i++)
327  header_buffer[i - 1] = s->buf[i] ^ s->buf[i + 1];
328 
329  header.compression = header_buffer[0];
330  header.deltaset = header_buffer[1];
331  header.vectable = header_buffer[2];
332  header.ysize = AV_RL16(&header_buffer[3]);
333  header.xsize = AV_RL16(&header_buffer[5]);
334  header.checksum = AV_RL16(&header_buffer[7]);
335  header.version = header_buffer[9];
336  header.header_type = header_buffer[10];
337  header.flags = header_buffer[11];
338  header.control = header_buffer[12];
339 
340  /* Version 2 */
341  if (header.version >= 2)
342  {
343  if (header.header_type > 3)
344  {
345  av_log(s->avctx, AV_LOG_ERROR, "invalid header type (%d)\n", header.header_type);
346  return -1;
347  } else if ((header.header_type == 2) || (header.header_type == 3)) {
348  s->flags = header.flags;
349  if (!(s->flags & FLAG_INTERFRAME))
350  s->flags |= FLAG_KEYFRAME;
351  } else
352  s->flags = FLAG_KEYFRAME;
353  } else /* Version 1 */
354  s->flags = FLAG_KEYFRAME;
355 
356  if (s->flags & FLAG_SPRITE) {
357  av_log_ask_for_sample(s->avctx, "SPRITE frame found.\n");
358  /* FIXME header.width, height, xoffset and yoffset aren't initialized */
359  return AVERROR_PATCHWELCOME;
360  } else {
361  s->w = header.xsize;
362  s->h = header.ysize;
363  if (header.header_type < 2) {
364  if ((s->w < 213) && (s->h >= 176))
365  {
366  s->flags |= FLAG_INTERPOLATED;
367  av_log_ask_for_sample(s->avctx, "INTERPOLATION selected.\n");
368  }
369  }
370  }
371 
372  if (header.compression >= 17) {
373  av_log(s->avctx, AV_LOG_ERROR, "invalid compression type (%d)\n", header.compression);
374  return -1;
375  }
376 
377  if ((header.deltaset != s->last_deltaset) ||
378  (header.vectable != s->last_vectable))
379  select_delta_tables(s, header.deltaset);
380 
381  if ((header.compression & 1) && header.header_type)
382  sel_vector_table = pc_tbl2;
383  else {
384  if (header.vectable > 0 && header.vectable < 4)
385  sel_vector_table = tables[header.vectable - 1];
386  else {
387  av_log(s->avctx, AV_LOG_ERROR, "invalid vector table id (%d)\n", header.vectable);
388  return -1;
389  }
390  }
391 
392  if (compression_types[header.compression].algorithm == ALGO_RGB24H) {
393  new_pix_fmt = AV_PIX_FMT_RGB32;
394  width_shift = 1;
395  } else
396  new_pix_fmt = AV_PIX_FMT_RGB555; // RGB565 is supported as well
397 
398  s->w >>= width_shift;
399  if (av_image_check_size(s->w, s->h, 0, s->avctx) < 0)
400  return -1;
401 
402  if (s->w != s->avctx->width || s->h != s->avctx->height ||
403  new_pix_fmt != s->avctx->pix_fmt) {
404  if (s->frame.data[0])
405  s->avctx->release_buffer(s->avctx, &s->frame);
406  s->avctx->sample_aspect_ratio = (AVRational){ 1 << width_shift, 1 };
407  s->avctx->pix_fmt = new_pix_fmt;
408  avcodec_set_dimensions(s->avctx, s->w, s->h);
409  av_fast_malloc(&s->vert_pred, &s->vert_pred_size, s->avctx->width * sizeof(unsigned int));
410  }
411 
412  /* There is 1 change bit per 4 pixels, so each change byte represents
413  * 32 pixels; divide width by 4 to obtain the number of change bits and
414  * then round up to the nearest byte. */
415  s->mb_change_bits_row_size = ((s->avctx->width >> (2 - width_shift)) + 7) >> 3;
416 
417  if ((header.deltaset != s->last_deltaset) || (header.vectable != s->last_vectable))
418  {
419  if (compression_types[header.compression].algorithm == ALGO_RGB24H)
420  gen_vector_table24(s, sel_vector_table);
421  else
422  if (s->avctx->pix_fmt == AV_PIX_FMT_RGB555)
423  gen_vector_table15(s, sel_vector_table);
424  else
425  gen_vector_table16(s, sel_vector_table);
426  }
427 
428  /* set up pointers to the other key data chunks */
429  s->mb_change_bits = s->buf + header.header_size;
430  if (s->flags & FLAG_KEYFRAME) {
431  /* no change bits specified for a keyframe; only index bytes */
433  } else {
434  /* one change bit per 4x4 block */
435  s->index_stream = s->mb_change_bits +
436  (s->mb_change_bits_row_size * (s->avctx->height >> 2));
437  }
438  s->index_stream_size = s->size - (s->index_stream - s->buf);
439 
440  s->last_deltaset = header.deltaset;
441  s->last_vectable = header.vectable;
442  s->compression = header.compression;
443  s->block_width = compression_types[header.compression].block_width;
444  s->block_height = compression_types[header.compression].block_height;
445  s->block_type = compression_types[header.compression].block_type;
446 
447  if (s->avctx->debug & FF_DEBUG_PICT_INFO)
448  av_log(s->avctx, AV_LOG_INFO, "tables: %d / %d c:%d %dx%d t:%d %s%s%s%s\n",
450  s->block_height, s->block_type,
451  s->flags & FLAG_KEYFRAME ? " KEY" : "",
452  s->flags & FLAG_INTERFRAME ? " INTER" : "",
453  s->flags & FLAG_SPRITE ? " SPRITE" : "",
454  s->flags & FLAG_INTERPOLATED ? " INTERPOL" : "");
455 
456  return header.header_size;
457 }
458 
460 {
461  TrueMotion1Context *s = avctx->priv_data;
462 
463  s->avctx = avctx;
464 
465  // FIXME: it may change ?
466 // if (avctx->bits_per_sample == 24)
467 // avctx->pix_fmt = AV_PIX_FMT_RGB24;
468 // else
469 // avctx->pix_fmt = AV_PIX_FMT_RGB555;
470 
471  s->frame.data[0] = NULL;
472 
473  /* there is a vertical predictor for each pixel in a line; each vertical
474  * predictor is 0 to start with */
475  av_fast_malloc(&s->vert_pred, &s->vert_pred_size, s->avctx->width * sizeof(unsigned int));
476 
477  return 0;
478 }
479 
480 /*
481 Block decoding order:
482 
483 dxi: Y-Y
484 dxic: Y-C-Y
485 dxic2: Y-C-Y-C
486 
487 hres,vres,i,i%vres (0 < i < 4)
488 2x2 0: 0 dxic2
489 2x2 1: 1 dxi
490 2x2 2: 0 dxic2
491 2x2 3: 1 dxi
492 2x4 0: 0 dxic2
493 2x4 1: 1 dxi
494 2x4 2: 2 dxi
495 2x4 3: 3 dxi
496 4x2 0: 0 dxic
497 4x2 1: 1 dxi
498 4x2 2: 0 dxic
499 4x2 3: 1 dxi
500 4x4 0: 0 dxic
501 4x4 1: 1 dxi
502 4x4 2: 2 dxi
503 4x4 3: 3 dxi
504 */
505 
506 #define GET_NEXT_INDEX() \
507 {\
508  if (index_stream_index >= s->index_stream_size) { \
509  av_log(s->avctx, AV_LOG_INFO, " help! truemotion1 decoder went out of bounds\n"); \
510  return; \
511  } \
512  index = s->index_stream[index_stream_index++] * 4; \
513 }
514 
515 #define INC_INDEX \
516 do { \
517  if (index >= 1023) { \
518  av_log(s->avctx, AV_LOG_ERROR, "Invalid index value.\n"); \
519  return; \
520  } \
521  index++; \
522 } while (0)
523 
524 #define APPLY_C_PREDICTOR() \
525  predictor_pair = s->c_predictor_table[index]; \
526  horiz_pred += (predictor_pair >> 1); \
527  if (predictor_pair & 1) { \
528  GET_NEXT_INDEX() \
529  if (!index) { \
530  GET_NEXT_INDEX() \
531  predictor_pair = s->c_predictor_table[index]; \
532  horiz_pred += ((predictor_pair >> 1) * 5); \
533  if (predictor_pair & 1) \
534  GET_NEXT_INDEX() \
535  else \
536  INC_INDEX; \
537  } \
538  } else \
539  INC_INDEX;
540 
541 #define APPLY_C_PREDICTOR_24() \
542  predictor_pair = s->c_predictor_table[index]; \
543  horiz_pred += (predictor_pair >> 1); \
544  if (predictor_pair & 1) { \
545  GET_NEXT_INDEX() \
546  if (!index) { \
547  GET_NEXT_INDEX() \
548  predictor_pair = s->fat_c_predictor_table[index]; \
549  horiz_pred += (predictor_pair >> 1); \
550  if (predictor_pair & 1) \
551  GET_NEXT_INDEX() \
552  else \
553  INC_INDEX; \
554  } \
555  } else \
556  INC_INDEX;
557 
558 
559 #define APPLY_Y_PREDICTOR() \
560  predictor_pair = s->y_predictor_table[index]; \
561  horiz_pred += (predictor_pair >> 1); \
562  if (predictor_pair & 1) { \
563  GET_NEXT_INDEX() \
564  if (!index) { \
565  GET_NEXT_INDEX() \
566  predictor_pair = s->y_predictor_table[index]; \
567  horiz_pred += ((predictor_pair >> 1) * 5); \
568  if (predictor_pair & 1) \
569  GET_NEXT_INDEX() \
570  else \
571  INC_INDEX; \
572  } \
573  } else \
574  INC_INDEX;
575 
576 #define APPLY_Y_PREDICTOR_24() \
577  predictor_pair = s->y_predictor_table[index]; \
578  horiz_pred += (predictor_pair >> 1); \
579  if (predictor_pair & 1) { \
580  GET_NEXT_INDEX() \
581  if (!index) { \
582  GET_NEXT_INDEX() \
583  predictor_pair = s->fat_y_predictor_table[index]; \
584  horiz_pred += (predictor_pair >> 1); \
585  if (predictor_pair & 1) \
586  GET_NEXT_INDEX() \
587  else \
588  INC_INDEX; \
589  } \
590  } else \
591  INC_INDEX;
592 
593 #define OUTPUT_PIXEL_PAIR() \
594  *current_pixel_pair = *vert_pred + horiz_pred; \
595  *vert_pred++ = *current_pixel_pair++;
596 
598 {
599  int y;
600  int pixels_left; /* remaining pixels on this line */
601  unsigned int predictor_pair;
602  unsigned int horiz_pred;
603  unsigned int *vert_pred;
604  unsigned int *current_pixel_pair;
605  unsigned char *current_line = s->frame.data[0];
606  int keyframe = s->flags & FLAG_KEYFRAME;
607 
608  /* these variables are for managing the stream of macroblock change bits */
609  const unsigned char *mb_change_bits = s->mb_change_bits;
610  unsigned char mb_change_byte;
611  unsigned char mb_change_byte_mask;
612  int mb_change_index;
613 
614  /* these variables are for managing the main index stream */
615  int index_stream_index = 0; /* yes, the index into the index stream */
616  int index;
617 
618  /* clean out the line buffer */
619  memset(s->vert_pred, 0, s->avctx->width * sizeof(unsigned int));
620 
621  GET_NEXT_INDEX();
622 
623  for (y = 0; y < s->avctx->height; y++) {
624 
625  /* re-init variables for the next line iteration */
626  horiz_pred = 0;
627  current_pixel_pair = (unsigned int *)current_line;
628  vert_pred = s->vert_pred;
629  mb_change_index = 0;
630  mb_change_byte = mb_change_bits[mb_change_index++];
631  mb_change_byte_mask = 0x01;
632  pixels_left = s->avctx->width;
633 
634  while (pixels_left > 0) {
635 
636  if (keyframe || ((mb_change_byte & mb_change_byte_mask) == 0)) {
637 
638  switch (y & 3) {
639  case 0:
640  /* if macroblock width is 2, apply C-Y-C-Y; else
641  * apply C-Y-Y */
642  if (s->block_width == 2) {
649  } else {
655  }
656  break;
657 
658  case 1:
659  case 3:
660  /* always apply 2 Y predictors on these iterations */
665  break;
666 
667  case 2:
668  /* this iteration might be C-Y-C-Y, Y-Y, or C-Y-Y
669  * depending on the macroblock type */
670  if (s->block_type == BLOCK_2x2) {
677  } else if (s->block_type == BLOCK_4x2) {
683  } else {
688  }
689  break;
690  }
691 
692  } else {
693 
694  /* skip (copy) four pixels, but reassign the horizontal
695  * predictor */
696  *vert_pred++ = *current_pixel_pair++;
697  horiz_pred = *current_pixel_pair - *vert_pred;
698  *vert_pred++ = *current_pixel_pair++;
699 
700  }
701 
702  if (!keyframe) {
703  mb_change_byte_mask <<= 1;
704 
705  /* next byte */
706  if (!mb_change_byte_mask) {
707  mb_change_byte = mb_change_bits[mb_change_index++];
708  mb_change_byte_mask = 0x01;
709  }
710  }
711 
712  pixels_left -= 4;
713  }
714 
715  /* next change row */
716  if (((y + 1) & 3) == 0)
717  mb_change_bits += s->mb_change_bits_row_size;
718 
719  current_line += s->frame.linesize[0];
720  }
721 }
722 
724 {
725  int y;
726  int pixels_left; /* remaining pixels on this line */
727  unsigned int predictor_pair;
728  unsigned int horiz_pred;
729  unsigned int *vert_pred;
730  unsigned int *current_pixel_pair;
731  unsigned char *current_line = s->frame.data[0];
732  int keyframe = s->flags & FLAG_KEYFRAME;
733 
734  /* these variables are for managing the stream of macroblock change bits */
735  const unsigned char *mb_change_bits = s->mb_change_bits;
736  unsigned char mb_change_byte;
737  unsigned char mb_change_byte_mask;
738  int mb_change_index;
739 
740  /* these variables are for managing the main index stream */
741  int index_stream_index = 0; /* yes, the index into the index stream */
742  int index;
743 
744  /* clean out the line buffer */
745  memset(s->vert_pred, 0, s->avctx->width * sizeof(unsigned int));
746 
747  GET_NEXT_INDEX();
748 
749  for (y = 0; y < s->avctx->height; y++) {
750 
751  /* re-init variables for the next line iteration */
752  horiz_pred = 0;
753  current_pixel_pair = (unsigned int *)current_line;
754  vert_pred = s->vert_pred;
755  mb_change_index = 0;
756  mb_change_byte = mb_change_bits[mb_change_index++];
757  mb_change_byte_mask = 0x01;
758  pixels_left = s->avctx->width;
759 
760  while (pixels_left > 0) {
761 
762  if (keyframe || ((mb_change_byte & mb_change_byte_mask) == 0)) {
763 
764  switch (y & 3) {
765  case 0:
766  /* if macroblock width is 2, apply C-Y-C-Y; else
767  * apply C-Y-Y */
768  if (s->block_width == 2) {
775  } else {
781  }
782  break;
783 
784  case 1:
785  case 3:
786  /* always apply 2 Y predictors on these iterations */
791  break;
792 
793  case 2:
794  /* this iteration might be C-Y-C-Y, Y-Y, or C-Y-Y
795  * depending on the macroblock type */
796  if (s->block_type == BLOCK_2x2) {
803  } else if (s->block_type == BLOCK_4x2) {
809  } else {
814  }
815  break;
816  }
817 
818  } else {
819 
820  /* skip (copy) four pixels, but reassign the horizontal
821  * predictor */
822  *vert_pred++ = *current_pixel_pair++;
823  horiz_pred = *current_pixel_pair - *vert_pred;
824  *vert_pred++ = *current_pixel_pair++;
825 
826  }
827 
828  if (!keyframe) {
829  mb_change_byte_mask <<= 1;
830 
831  /* next byte */
832  if (!mb_change_byte_mask) {
833  mb_change_byte = mb_change_bits[mb_change_index++];
834  mb_change_byte_mask = 0x01;
835  }
836  }
837 
838  pixels_left -= 2;
839  }
840 
841  /* next change row */
842  if (((y + 1) & 3) == 0)
843  mb_change_bits += s->mb_change_bits_row_size;
844 
845  current_line += s->frame.linesize[0];
846  }
847 }
848 
849 
851  void *data, int *got_frame,
852  AVPacket *avpkt)
853 {
854  const uint8_t *buf = avpkt->data;
855  int buf_size = avpkt->size;
856  TrueMotion1Context *s = avctx->priv_data;
857 
858  s->buf = buf;
859  s->size = buf_size;
860 
861  if (truemotion1_decode_header(s) == -1)
862  return -1;
863 
864  s->frame.reference = 1;
867  if (avctx->reget_buffer(avctx, &s->frame) < 0) {
868  av_log(s->avctx, AV_LOG_ERROR, "get_buffer() failed\n");
869  return -1;
870  }
871 
872  if (compression_types[s->compression].algorithm == ALGO_RGB24H) {
874  } else if (compression_types[s->compression].algorithm != ALGO_NOP) {
876  }
877 
878  *got_frame = 1;
879  *(AVFrame*)data = s->frame;
880 
881  /* report that the buffer was completely consumed */
882  return buf_size;
883 }
884 
886 {
887  TrueMotion1Context *s = avctx->priv_data;
888 
889  if (s->frame.data[0])
890  avctx->release_buffer(avctx, &s->frame);
891 
892  av_free(s->vert_pred);
893 
894  return 0;
895 }
896 
898  .name = "truemotion1",
899  .type = AVMEDIA_TYPE_VIDEO,
901  .priv_data_size = sizeof(TrueMotion1Context),
905  .capabilities = CODEC_CAP_DR1,
906  .long_name = NULL_IF_CONFIG_SMALL("Duck TrueMotion 1.0"),
907 };
uint8_t version
Definition: truemotion1.c:94
uint8_t deltaset
Definition: truemotion1.c:89
This structure describes decoded (raw) audio or video data.
Definition: avcodec.h:989
int16_t fat_ydt[8]
Definition: truemotion1.c:71
int block_height
Definition: truemotion1.c:118
int buffer_hints
codec suggestion on buffer type if != 0
Definition: avcodec.h:1253
void(* release_buffer)(struct AVCodecContext *c, AVFrame *pic)
Called to release buffers which were allocated with get_buffer.
Definition: avcodec.h:2259
static const int16_t *const fat_ydts[]
misc image utilities
memory handling functions
#define OUTPUT_PIXEL_PAIR()
Definition: truemotion1.c:593
static void truemotion1_decode_16bit(TrueMotion1Context *s)
Definition: truemotion1.c:597
void avcodec_set_dimensions(AVCodecContext *s, int width, int height)
Definition: utils.c:149
int size
Definition: avcodec.h:916
#define GET_NEXT_INDEX()
Definition: truemotion1.c:506
AVRational sample_aspect_ratio
sample aspect ratio (0 if unknown) That is the width of a pixel divided by the height of the pixel...
Definition: avcodec.h:1724
enum AVPixelFormat pix_fmt
Pixel format, see AV_PIX_FMT_xxx.
Definition: avcodec.h:1533
#define AV_RL16
Definition: intreadwrite.h:42
static void gen_vector_table24(TrueMotion1Context *s, const uint8_t *sel_vector_table)
Definition: truemotion1.c:280
AVCodec.
Definition: avcodec.h:2960
AVCodec ff_truemotion1_decoder
Definition: truemotion1.c:897
int(* reget_buffer)(struct AVCodecContext *c, AVFrame *pic)
Called at the beginning of a frame to get cr buffer for it.
Definition: avcodec.h:2273
void av_fast_malloc(void *ptr, unsigned int *size, size_t min_size)
Allocate a buffer, reusing the given one if large enough.
Definition: utils.c:72
static int truemotion1_decode_header(TrueMotion1Context *s)
Definition: truemotion1.c:309
int16_t cdt[8]
Definition: truemotion1.c:70
static int decode(MimicContext *ctx, int quality, int num_coeffs, int is_iframe)
Definition: mimic.c:228
const uint8_t * index_stream
Definition: truemotion1.c:53
uint8_t
#define FLAG_KEYFRAME
Definition: truemotion1.c:82
#define b
Definition: input.c:52
const char data[16]
Definition: mxf.c:66
uint8_t * data
Definition: avcodec.h:915
#define FLAG_SPRITE
Definition: truemotion1.c:81
static int init(AVCodecParserContext *s)
Definition: h264_parser.c:335
#define r
Definition: input.c:51
const uint8_t * buf
Definition: truemotion1.c:48
struct comp_types comp_types
static av_cold int truemotion1_decode_end(AVCodecContext *avctx)
Definition: truemotion1.c:885
uint16_t yoffset
Definition: truemotion1.c:99
void av_free(void *ptr)
Free a memory block which has been allocated with av_malloc(z)() or av_realloc(). ...
Definition: mem.c:139
void av_log_ask_for_sample(void *avc, const char *msg,...) av_printf_format(2
Log a generic warning message asking for a sample.
int reference
is this picture used as reference The values for this are the same as the MpegEncContext.picture_structure variable, that is 1->top field, 2->bottom field, 3->frame/both fields.
Definition: avcodec.h:1132
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:88
static void truemotion1_decode_24bit(TrueMotion1Context *s)
Definition: truemotion1.c:723
uint16_t xsize
Definition: truemotion1.c:92
void av_log(void *avcl, int level, const char *fmt,...)
Definition: log.c:146
const char * name
Name of the codec implementation.
Definition: avcodec.h:2967
#define BLOCK_4x2
Definition: truemotion1.c:112
static const uint8_t *const tables[]
static const uint8_t pc_tbl2[]
uint32_t c_predictor_table[1024]
Definition: truemotion1.c:60
common internal API header
struct AVRational AVRational
rational number numerator/denominator
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
AVCodecContext * avctx
Definition: truemotion1.c:45
int width
picture width / height.
Definition: avcodec.h:1508
static int make_ydt15_entry(int p1, int p2, int16_t *ydt)
Definition: truemotion1.c:173
uint16_t height
Definition: truemotion1.c:101
struct TrueMotion1Context TrueMotion1Context
unsigned int * vert_pred
Definition: truemotion1.c:76
static int make_cdt24_entry(int p1, int p2, int16_t *cdt)
Definition: truemotion1.c:229
static const comp_types compression_types[17]
Definition: truemotion1.c:123
#define APPLY_C_PREDICTOR_24()
Definition: truemotion1.c:541
#define ALGO_RGB16V
Definition: truemotion1.c:105
#define ALGO_NOP
Definition: truemotion1.c:104
static int make_ydt24_entry(int p1, int p2, int16_t *ydt)
Definition: truemotion1.c:220
NULL
Definition: eval.c:52
uint8_t header_size
Definition: truemotion1.c:87
static const int16_t *const cdts[]
external API header
static void gen_vector_table16(TrueMotion1Context *s, const uint8_t *sel_vector_table)
Definition: truemotion1.c:259
static const int16_t *const ydts[]
#define ALGO_RGB16H
Definition: truemotion1.c:106
int linesize[AV_NUM_DATA_POINTERS]
Size, in bytes, of the data for each picture/channel plane.
Definition: avcodec.h:1008
int debug
debug
Definition: avcodec.h:2568
main external API structure.
Definition: avcodec.h:1339
uint32_t fat_c_predictor_table[1024]
Definition: truemotion1.c:62
static void close(AVCodecParserContext *s)
Definition: h264_parser.c:326
#define ALGO_RGB24H
Definition: truemotion1.c:107
static int make_cdt15_entry(int p1, int p2, int16_t *cdt)
Definition: truemotion1.c:185
int index
Definition: gxfenc.c:72
int16_t fat_cdt[8]
Definition: truemotion1.c:72
int block_width
Definition: truemotion1.c:117
static av_cold int truemotion1_decode_init(AVCodecContext *avctx)
Definition: truemotion1.c:459
uint16_t width
Definition: truemotion1.c:100
int block_type
Definition: truemotion1.c:119
uint8_t vectable
Definition: truemotion1.c:90
static int truemotion1_decode_frame(AVCodecContext *avctx, void *data, int *got_frame, AVPacket *avpkt)
Definition: truemotion1.c:850
#define APPLY_Y_PREDICTOR()
Definition: truemotion1.c:559
#define APPLY_C_PREDICTOR()
Definition: truemotion1.c:524
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
Definition: avcodec.h:997
uint16_t xoffset
Definition: truemotion1.c:98
#define BLOCK_2x2
Definition: truemotion1.c:110
uint16_t checksum
Definition: truemotion1.c:93
static int make_ydt16_entry(int p1, int p2, int16_t *ydt)
Definition: truemotion1.c:198
uint8_t flags
Definition: truemotion1.c:96
uint8_t compression
Definition: truemotion1.c:88
static void gen_vector_table15(TrueMotion1Context *s, const uint8_t *sel_vector_table)
Definition: truemotion1.c:238
static int make_cdt16_entry(int p1, int p2, int16_t *cdt)
Definition: truemotion1.c:210
DSP utils.
void * priv_data
Definition: avcodec.h:1382
uint32_t fat_y_predictor_table[1024]
Definition: truemotion1.c:61
int len
#define FLAG_INTERFRAME
Definition: truemotion1.c:83
uint16_t ysize
Definition: truemotion1.c:91
uint8_t control
Definition: truemotion1.c:97
uint32_t y_predictor_table[1024]
Definition: truemotion1.c:59
static const int16_t *const fat_cdts[]
#define BLOCK_4x4
Definition: truemotion1.c:113
#define BLOCK_2x4
Definition: truemotion1.c:111
static void select_delta_tables(TrueMotion1Context *s, int delta_table_index)
Definition: truemotion1.c:147
#define APPLY_Y_PREDICTOR_24()
Definition: truemotion1.c:576
const uint8_t * mb_change_bits
Definition: truemotion1.c:51
#define FLAG_INTERPOLATED
Definition: truemotion1.c:84
This structure stores compressed data.
Definition: avcodec.h:898
int16_t ydt[8]
Definition: truemotion1.c:69
uint8_t header_type
Definition: truemotion1.c:95