Libav
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 "internal.h"
38 #include "libavutil/imgutils.h"
39 #include "libavutil/internal.h"
40 #include "libavutil/intreadwrite.h"
41 #include "libavutil/mem.h"
42 
43 #include "truemotion1data.h"
44 
45 typedef struct TrueMotion1Context {
48 
49  const uint8_t *buf;
50  int size;
51 
56 
57  int flags;
58  int x, y, w, h;
59 
60  uint32_t y_predictor_table[1024];
61  uint32_t c_predictor_table[1024];
62  uint32_t fat_y_predictor_table[1024];
63  uint32_t fat_c_predictor_table[1024];
64 
69 
70  int16_t ydt[8];
71  int16_t cdt[8];
72  int16_t fat_ydt[8];
73  int16_t fat_cdt[8];
74 
76 
77  unsigned int *vert_pred;
79 
81 
82 #define FLAG_SPRITE 32
83 #define FLAG_KEYFRAME 16
84 #define FLAG_INTERFRAME 8
85 #define FLAG_INTERPOLATED 4
86 
87 struct frame_header {
92  uint16_t ysize;
93  uint16_t xsize;
94  uint16_t checksum;
99  uint16_t xoffset;
100  uint16_t yoffset;
101  uint16_t width;
102  uint16_t height;
103 };
104 
105 #define ALGO_NOP 0
106 #define ALGO_RGB16V 1
107 #define ALGO_RGB16H 2
108 #define ALGO_RGB24H 3
109 
110 /* these are the various block sizes that can occupy a 4x4 block */
111 #define BLOCK_2x2 0
112 #define BLOCK_2x4 1
113 #define BLOCK_4x2 2
114 #define BLOCK_4x4 3
115 
116 typedef struct comp_types {
118  int block_width; // vres
119  int block_height; // hres
121 } comp_types;
122 
123 /* { valid for metatype }, algorithm, num of deltas, vert res, horiz res */
124 static const comp_types compression_types[17] = {
125  { ALGO_NOP, 0, 0, 0 },
126 
127  { ALGO_RGB16V, 4, 4, BLOCK_4x4 },
128  { ALGO_RGB16H, 4, 4, BLOCK_4x4 },
129  { ALGO_RGB16V, 4, 2, BLOCK_4x2 },
130  { ALGO_RGB16H, 4, 2, BLOCK_4x2 },
131 
132  { ALGO_RGB16V, 2, 4, BLOCK_2x4 },
133  { ALGO_RGB16H, 2, 4, BLOCK_2x4 },
134  { ALGO_RGB16V, 2, 2, BLOCK_2x2 },
135  { ALGO_RGB16H, 2, 2, BLOCK_2x2 },
136 
137  { ALGO_NOP, 4, 4, BLOCK_4x4 },
138  { ALGO_RGB24H, 4, 4, BLOCK_4x4 },
139  { ALGO_NOP, 4, 2, BLOCK_4x2 },
140  { ALGO_RGB24H, 4, 2, BLOCK_4x2 },
141 
142  { ALGO_NOP, 2, 4, BLOCK_2x4 },
143  { ALGO_RGB24H, 2, 4, BLOCK_2x4 },
144  { ALGO_NOP, 2, 2, BLOCK_2x2 },
145  { ALGO_RGB24H, 2, 2, BLOCK_2x2 }
146 };
147 
148 static void select_delta_tables(TrueMotion1Context *s, int delta_table_index)
149 {
150  int i;
151 
152  if (delta_table_index > 3)
153  return;
154 
155  memcpy(s->ydt, ydts[delta_table_index], 8 * sizeof(int16_t));
156  memcpy(s->cdt, cdts[delta_table_index], 8 * sizeof(int16_t));
157  memcpy(s->fat_ydt, fat_ydts[delta_table_index], 8 * sizeof(int16_t));
158  memcpy(s->fat_cdt, fat_cdts[delta_table_index], 8 * sizeof(int16_t));
159 
160  /* Y skinny deltas need to be halved for some reason; maybe the
161  * skinny Y deltas should be modified */
162  for (i = 0; i < 8; i++)
163  {
164  /* drop the lsb before dividing by 2-- net effect: round down
165  * when dividing a negative number (e.g., -3/2 = -2, not -1) */
166  s->ydt[i] &= 0xFFFE;
167  s->ydt[i] /= 2;
168  }
169 }
170 
171 #if HAVE_BIGENDIAN
172 static int make_ydt15_entry(int p2, int p1, int16_t *ydt)
173 #else
174 static int make_ydt15_entry(int p1, int p2, int16_t *ydt)
175 #endif
176 {
177  int lo, hi;
178 
179  lo = ydt[p1];
180  lo += (lo << 5) + (lo << 10);
181  hi = ydt[p2];
182  hi += (hi << 5) + (hi << 10);
183  return (lo + (hi << 16)) << 1;
184 }
185 
186 static int make_cdt15_entry(int p1, int p2, int16_t *cdt)
187 {
188  int r, b, lo;
189 
190  b = cdt[p2];
191  r = cdt[p1] << 10;
192  lo = b + r;
193  return (lo + (lo << 16)) << 1;
194 }
195 
196 #if HAVE_BIGENDIAN
197 static int make_ydt16_entry(int p2, int p1, int16_t *ydt)
198 #else
199 static int make_ydt16_entry(int p1, int p2, int16_t *ydt)
200 #endif
201 {
202  int lo, hi;
203 
204  lo = ydt[p1];
205  lo += (lo << 6) + (lo << 11);
206  hi = ydt[p2];
207  hi += (hi << 6) + (hi << 11);
208  return (lo + (hi << 16)) << 1;
209 }
210 
211 static int make_cdt16_entry(int p1, int p2, int16_t *cdt)
212 {
213  int r, b, lo;
214 
215  b = cdt[p2];
216  r = cdt[p1] << 11;
217  lo = b + r;
218  return (lo + (lo << 16)) << 1;
219 }
220 
221 static int make_ydt24_entry(int p1, int p2, int16_t *ydt)
222 {
223  int lo, hi;
224 
225  lo = ydt[p1];
226  hi = ydt[p2];
227  return (lo + (hi << 8) + (hi << 16)) << 1;
228 }
229 
230 static int make_cdt24_entry(int p1, int p2, int16_t *cdt)
231 {
232  int r, b;
233 
234  b = cdt[p2];
235  r = cdt[p1]<<16;
236  return (b+r) << 1;
237 }
238 
239 static void gen_vector_table15(TrueMotion1Context *s, const uint8_t *sel_vector_table)
240 {
241  int len, i, j;
242  unsigned char delta_pair;
243 
244  for (i = 0; i < 1024; i += 4)
245  {
246  len = *sel_vector_table++ / 2;
247  for (j = 0; j < len; j++)
248  {
249  delta_pair = *sel_vector_table++;
250  s->y_predictor_table[i+j] = 0xfffffffe &
251  make_ydt15_entry(delta_pair >> 4, delta_pair & 0xf, s->ydt);
252  s->c_predictor_table[i+j] = 0xfffffffe &
253  make_cdt15_entry(delta_pair >> 4, delta_pair & 0xf, s->cdt);
254  }
255  s->y_predictor_table[i+(j-1)] |= 1;
256  s->c_predictor_table[i+(j-1)] |= 1;
257  }
258 }
259 
260 static void gen_vector_table16(TrueMotion1Context *s, const uint8_t *sel_vector_table)
261 {
262  int len, i, j;
263  unsigned char delta_pair;
264 
265  for (i = 0; i < 1024; i += 4)
266  {
267  len = *sel_vector_table++ / 2;
268  for (j = 0; j < len; j++)
269  {
270  delta_pair = *sel_vector_table++;
271  s->y_predictor_table[i+j] = 0xfffffffe &
272  make_ydt16_entry(delta_pair >> 4, delta_pair & 0xf, s->ydt);
273  s->c_predictor_table[i+j] = 0xfffffffe &
274  make_cdt16_entry(delta_pair >> 4, delta_pair & 0xf, s->cdt);
275  }
276  s->y_predictor_table[i+(j-1)] |= 1;
277  s->c_predictor_table[i+(j-1)] |= 1;
278  }
279 }
280 
281 static void gen_vector_table24(TrueMotion1Context *s, const uint8_t *sel_vector_table)
282 {
283  int len, i, j;
284  unsigned char delta_pair;
285 
286  for (i = 0; i < 1024; i += 4)
287  {
288  len = *sel_vector_table++ / 2;
289  for (j = 0; j < len; j++)
290  {
291  delta_pair = *sel_vector_table++;
292  s->y_predictor_table[i+j] = 0xfffffffe &
293  make_ydt24_entry(delta_pair >> 4, delta_pair & 0xf, s->ydt);
294  s->c_predictor_table[i+j] = 0xfffffffe &
295  make_cdt24_entry(delta_pair >> 4, delta_pair & 0xf, s->cdt);
296  s->fat_y_predictor_table[i+j] = 0xfffffffe &
297  make_ydt24_entry(delta_pair >> 4, delta_pair & 0xf, s->fat_ydt);
298  s->fat_c_predictor_table[i+j] = 0xfffffffe &
299  make_cdt24_entry(delta_pair >> 4, delta_pair & 0xf, s->fat_cdt);
300  }
301  s->y_predictor_table[i+(j-1)] |= 1;
302  s->c_predictor_table[i+(j-1)] |= 1;
303  s->fat_y_predictor_table[i+(j-1)] |= 1;
304  s->fat_c_predictor_table[i+(j-1)] |= 1;
305  }
306 }
307 
308 /* Returns the number of bytes consumed from the bytestream. Returns -1 if
309  * there was an error while decoding the header */
311 {
312  int i, ret;
313  int width_shift = 0;
314  int new_pix_fmt;
315  struct frame_header header;
316  uint8_t header_buffer[128] = { 0 }; /* logical maximum size of the header */
317  const uint8_t *sel_vector_table;
318 
319  header.header_size = ((s->buf[0] >> 5) | (s->buf[0] << 3)) & 0x7f;
320  if (s->buf[0] < 0x10)
321  {
322  av_log(s->avctx, AV_LOG_ERROR, "invalid header size (%d)\n", s->buf[0]);
323  return AVERROR_INVALIDDATA;
324  }
325 
326  if (header.header_size + 1 > s->size) {
327  av_log(s->avctx, AV_LOG_ERROR, "Input packet too small.\n");
328  return AVERROR_INVALIDDATA;
329  }
330 
331  /* unscramble the header bytes with a XOR operation */
332  for (i = 1; i < header.header_size; i++)
333  header_buffer[i - 1] = s->buf[i] ^ s->buf[i + 1];
334 
335  header.compression = header_buffer[0];
336  header.deltaset = header_buffer[1];
337  header.vectable = header_buffer[2];
338  header.ysize = AV_RL16(&header_buffer[3]);
339  header.xsize = AV_RL16(&header_buffer[5]);
340  header.checksum = AV_RL16(&header_buffer[7]);
341  header.version = header_buffer[9];
342  header.header_type = header_buffer[10];
343  header.flags = header_buffer[11];
344  header.control = header_buffer[12];
345 
346  /* Version 2 */
347  if (header.version >= 2)
348  {
349  if (header.header_type > 3)
350  {
351  av_log(s->avctx, AV_LOG_ERROR, "invalid header type (%d)\n", header.header_type);
352  return AVERROR_INVALIDDATA;
353  } else if ((header.header_type == 2) || (header.header_type == 3)) {
354  s->flags = header.flags;
355  if (!(s->flags & FLAG_INTERFRAME))
356  s->flags |= FLAG_KEYFRAME;
357  } else
358  s->flags = FLAG_KEYFRAME;
359  } else /* Version 1 */
360  s->flags = FLAG_KEYFRAME;
361 
362  if (s->flags & FLAG_SPRITE) {
363  avpriv_request_sample(s->avctx, "Frame with sprite");
364  /* FIXME header.width, height, xoffset and yoffset aren't initialized */
365  return AVERROR_PATCHWELCOME;
366  } else {
367  s->w = header.xsize;
368  s->h = header.ysize;
369  if (header.header_type < 2) {
370  if ((s->w < 213) && (s->h >= 176))
371  {
372  s->flags |= FLAG_INTERPOLATED;
373  avpriv_request_sample(s->avctx, "Interpolated frame");
374  }
375  }
376  }
377 
378  if (header.compression >= 17) {
379  av_log(s->avctx, AV_LOG_ERROR, "invalid compression type (%d)\n", header.compression);
380  return AVERROR_INVALIDDATA;
381  }
382 
383  if ((header.deltaset != s->last_deltaset) ||
384  (header.vectable != s->last_vectable))
385  select_delta_tables(s, header.deltaset);
386 
387  if ((header.compression & 1) && header.header_type)
388  sel_vector_table = pc_tbl2;
389  else {
390  if (header.vectable > 0 && header.vectable < 4)
391  sel_vector_table = tables[header.vectable - 1];
392  else {
393  av_log(s->avctx, AV_LOG_ERROR, "invalid vector table id (%d)\n", header.vectable);
394  return AVERROR_INVALIDDATA;
395  }
396  }
397 
398  if (compression_types[header.compression].algorithm == ALGO_RGB24H) {
399  new_pix_fmt = AV_PIX_FMT_RGB32;
400  width_shift = 1;
401  } else
402  new_pix_fmt = AV_PIX_FMT_RGB555; // RGB565 is supported as well
403 
404  s->w >>= width_shift;
405 
406  if (s->w != s->avctx->width || s->h != s->avctx->height ||
407  new_pix_fmt != s->avctx->pix_fmt) {
408  av_frame_unref(s->frame);
409  s->avctx->sample_aspect_ratio = (AVRational){ 1 << width_shift, 1 };
410  s->avctx->pix_fmt = new_pix_fmt;
411 
412  if ((ret = ff_set_dimensions(s->avctx, s->w, s->h)) < 0)
413  return ret;
414 
416 
417  av_fast_malloc(&s->vert_pred, &s->vert_pred_size, s->avctx->width * sizeof(unsigned int));
418  }
419 
420  /* There is 1 change bit per 4 pixels, so each change byte represents
421  * 32 pixels; divide width by 4 to obtain the number of change bits and
422  * then round up to the nearest byte. */
423  s->mb_change_bits_row_size = ((s->avctx->width >> (2 - width_shift)) + 7) >> 3;
424 
425  if ((header.deltaset != s->last_deltaset) || (header.vectable != s->last_vectable))
426  {
427  if (compression_types[header.compression].algorithm == ALGO_RGB24H)
428  gen_vector_table24(s, sel_vector_table);
429  else
430  if (s->avctx->pix_fmt == AV_PIX_FMT_RGB555)
431  gen_vector_table15(s, sel_vector_table);
432  else
433  gen_vector_table16(s, sel_vector_table);
434  }
435 
436  /* set up pointers to the other key data chunks */
437  s->mb_change_bits = s->buf + header.header_size;
438  if (s->flags & FLAG_KEYFRAME) {
439  /* no change bits specified for a keyframe; only index bytes */
441  } else {
442  /* one change bit per 4x4 block */
443  s->index_stream = s->mb_change_bits +
444  (s->mb_change_bits_row_size * (s->avctx->height >> 2));
445  }
446  s->index_stream_size = s->size - (s->index_stream - s->buf);
447 
448  s->last_deltaset = header.deltaset;
449  s->last_vectable = header.vectable;
450  s->compression = header.compression;
451  s->block_width = compression_types[header.compression].block_width;
452  s->block_height = compression_types[header.compression].block_height;
453  s->block_type = compression_types[header.compression].block_type;
454 
455  if (s->avctx->debug & FF_DEBUG_PICT_INFO)
456  av_log(s->avctx, AV_LOG_INFO, "tables: %d / %d c:%d %dx%d t:%d %s%s%s%s\n",
458  s->block_height, s->block_type,
459  s->flags & FLAG_KEYFRAME ? " KEY" : "",
460  s->flags & FLAG_INTERFRAME ? " INTER" : "",
461  s->flags & FLAG_SPRITE ? " SPRITE" : "",
462  s->flags & FLAG_INTERPOLATED ? " INTERPOL" : "");
463 
464  return header.header_size;
465 }
466 
468 {
469  TrueMotion1Context *s = avctx->priv_data;
470 
471  s->avctx = avctx;
472 
473  // FIXME: it may change ?
474 // if (avctx->bits_per_sample == 24)
475 // avctx->pix_fmt = AV_PIX_FMT_RGB24;
476 // else
477 // avctx->pix_fmt = AV_PIX_FMT_RGB555;
478 
479  s->frame = av_frame_alloc();
480  if (!s->frame)
481  return AVERROR(ENOMEM);
482 
483  /* there is a vertical predictor for each pixel in a line; each vertical
484  * predictor is 0 to start with */
485  av_fast_malloc(&s->vert_pred, &s->vert_pred_size, s->avctx->width * sizeof(unsigned int));
486 
487  return 0;
488 }
489 
490 /*
491 Block decoding order:
492 
493 dxi: Y-Y
494 dxic: Y-C-Y
495 dxic2: Y-C-Y-C
496 
497 hres,vres,i,i%vres (0 < i < 4)
498 2x2 0: 0 dxic2
499 2x2 1: 1 dxi
500 2x2 2: 0 dxic2
501 2x2 3: 1 dxi
502 2x4 0: 0 dxic2
503 2x4 1: 1 dxi
504 2x4 2: 2 dxi
505 2x4 3: 3 dxi
506 4x2 0: 0 dxic
507 4x2 1: 1 dxi
508 4x2 2: 0 dxic
509 4x2 3: 1 dxi
510 4x4 0: 0 dxic
511 4x4 1: 1 dxi
512 4x4 2: 2 dxi
513 4x4 3: 3 dxi
514 */
515 
516 #define GET_NEXT_INDEX() \
517 {\
518  if (index_stream_index >= s->index_stream_size) { \
519  av_log(s->avctx, AV_LOG_INFO, " help! truemotion1 decoder went out of bounds\n"); \
520  return; \
521  } \
522  index = s->index_stream[index_stream_index++] * 4; \
523 }
524 
525 #define INC_INDEX \
526 do { \
527  if (index >= 1023) { \
528  av_log(s->avctx, AV_LOG_ERROR, "Invalid index value.\n"); \
529  return; \
530  } \
531  index++; \
532 } while (0)
533 
534 #define APPLY_C_PREDICTOR() \
535  predictor_pair = s->c_predictor_table[index]; \
536  horiz_pred += (predictor_pair >> 1); \
537  if (predictor_pair & 1) { \
538  GET_NEXT_INDEX() \
539  if (!index) { \
540  GET_NEXT_INDEX() \
541  predictor_pair = s->c_predictor_table[index]; \
542  horiz_pred += ((predictor_pair >> 1) * 5); \
543  if (predictor_pair & 1) \
544  GET_NEXT_INDEX() \
545  else \
546  INC_INDEX; \
547  } \
548  } else \
549  INC_INDEX;
550 
551 #define APPLY_C_PREDICTOR_24() \
552  predictor_pair = s->c_predictor_table[index]; \
553  horiz_pred += (predictor_pair >> 1); \
554  if (predictor_pair & 1) { \
555  GET_NEXT_INDEX() \
556  if (!index) { \
557  GET_NEXT_INDEX() \
558  predictor_pair = s->fat_c_predictor_table[index]; \
559  horiz_pred += (predictor_pair >> 1); \
560  if (predictor_pair & 1) \
561  GET_NEXT_INDEX() \
562  else \
563  INC_INDEX; \
564  } \
565  } else \
566  INC_INDEX;
567 
568 
569 #define APPLY_Y_PREDICTOR() \
570  predictor_pair = s->y_predictor_table[index]; \
571  horiz_pred += (predictor_pair >> 1); \
572  if (predictor_pair & 1) { \
573  GET_NEXT_INDEX() \
574  if (!index) { \
575  GET_NEXT_INDEX() \
576  predictor_pair = s->y_predictor_table[index]; \
577  horiz_pred += ((predictor_pair >> 1) * 5); \
578  if (predictor_pair & 1) \
579  GET_NEXT_INDEX() \
580  else \
581  INC_INDEX; \
582  } \
583  } else \
584  INC_INDEX;
585 
586 #define APPLY_Y_PREDICTOR_24() \
587  predictor_pair = s->y_predictor_table[index]; \
588  horiz_pred += (predictor_pair >> 1); \
589  if (predictor_pair & 1) { \
590  GET_NEXT_INDEX() \
591  if (!index) { \
592  GET_NEXT_INDEX() \
593  predictor_pair = s->fat_y_predictor_table[index]; \
594  horiz_pred += (predictor_pair >> 1); \
595  if (predictor_pair & 1) \
596  GET_NEXT_INDEX() \
597  else \
598  INC_INDEX; \
599  } \
600  } else \
601  INC_INDEX;
602 
603 #define OUTPUT_PIXEL_PAIR() \
604  *current_pixel_pair = *vert_pred + horiz_pred; \
605  *vert_pred++ = *current_pixel_pair++;
606 
608 {
609  int y;
610  int pixels_left; /* remaining pixels on this line */
611  unsigned int predictor_pair;
612  unsigned int horiz_pred;
613  unsigned int *vert_pred;
614  unsigned int *current_pixel_pair;
615  unsigned char *current_line = s->frame->data[0];
616  int keyframe = s->flags & FLAG_KEYFRAME;
617 
618  /* these variables are for managing the stream of macroblock change bits */
619  const unsigned char *mb_change_bits = s->mb_change_bits;
620  unsigned char mb_change_byte;
621  unsigned char mb_change_byte_mask;
622  int mb_change_index;
623 
624  /* these variables are for managing the main index stream */
625  int index_stream_index = 0; /* yes, the index into the index stream */
626  int index;
627 
628  /* clean out the line buffer */
629  memset(s->vert_pred, 0, s->avctx->width * sizeof(unsigned int));
630 
631  GET_NEXT_INDEX();
632 
633  for (y = 0; y < s->avctx->height; y++) {
634 
635  /* re-init variables for the next line iteration */
636  horiz_pred = 0;
637  current_pixel_pair = (unsigned int *)current_line;
638  vert_pred = s->vert_pred;
639  mb_change_index = 0;
640  mb_change_byte = mb_change_bits[mb_change_index++];
641  mb_change_byte_mask = 0x01;
642  pixels_left = s->avctx->width;
643 
644  while (pixels_left > 0) {
645 
646  if (keyframe || ((mb_change_byte & mb_change_byte_mask) == 0)) {
647 
648  switch (y & 3) {
649  case 0:
650  /* if macroblock width is 2, apply C-Y-C-Y; else
651  * apply C-Y-Y */
652  if (s->block_width == 2) {
659  } else {
665  }
666  break;
667 
668  case 1:
669  case 3:
670  /* always apply 2 Y predictors on these iterations */
675  break;
676 
677  case 2:
678  /* this iteration might be C-Y-C-Y, Y-Y, or C-Y-Y
679  * depending on the macroblock type */
680  if (s->block_type == BLOCK_2x2) {
687  } else if (s->block_type == BLOCK_4x2) {
693  } else {
698  }
699  break;
700  }
701 
702  } else {
703 
704  /* skip (copy) four pixels, but reassign the horizontal
705  * predictor */
706  *vert_pred++ = *current_pixel_pair++;
707  horiz_pred = *current_pixel_pair - *vert_pred;
708  *vert_pred++ = *current_pixel_pair++;
709 
710  }
711 
712  if (!keyframe) {
713  mb_change_byte_mask <<= 1;
714 
715  /* next byte */
716  if (!mb_change_byte_mask) {
717  mb_change_byte = mb_change_bits[mb_change_index++];
718  mb_change_byte_mask = 0x01;
719  }
720  }
721 
722  pixels_left -= 4;
723  }
724 
725  /* next change row */
726  if (((y + 1) & 3) == 0)
727  mb_change_bits += s->mb_change_bits_row_size;
728 
729  current_line += s->frame->linesize[0];
730  }
731 }
732 
734 {
735  int y;
736  int pixels_left; /* remaining pixels on this line */
737  unsigned int predictor_pair;
738  unsigned int horiz_pred;
739  unsigned int *vert_pred;
740  unsigned int *current_pixel_pair;
741  unsigned char *current_line = s->frame->data[0];
742  int keyframe = s->flags & FLAG_KEYFRAME;
743 
744  /* these variables are for managing the stream of macroblock change bits */
745  const unsigned char *mb_change_bits = s->mb_change_bits;
746  unsigned char mb_change_byte;
747  unsigned char mb_change_byte_mask;
748  int mb_change_index;
749 
750  /* these variables are for managing the main index stream */
751  int index_stream_index = 0; /* yes, the index into the index stream */
752  int index;
753 
754  /* clean out the line buffer */
755  memset(s->vert_pred, 0, s->avctx->width * sizeof(unsigned int));
756 
757  GET_NEXT_INDEX();
758 
759  for (y = 0; y < s->avctx->height; y++) {
760 
761  /* re-init variables for the next line iteration */
762  horiz_pred = 0;
763  current_pixel_pair = (unsigned int *)current_line;
764  vert_pred = s->vert_pred;
765  mb_change_index = 0;
766  mb_change_byte = mb_change_bits[mb_change_index++];
767  mb_change_byte_mask = 0x01;
768  pixels_left = s->avctx->width;
769 
770  while (pixels_left > 0) {
771 
772  if (keyframe || ((mb_change_byte & mb_change_byte_mask) == 0)) {
773 
774  switch (y & 3) {
775  case 0:
776  /* if macroblock width is 2, apply C-Y-C-Y; else
777  * apply C-Y-Y */
778  if (s->block_width == 2) {
785  } else {
791  }
792  break;
793 
794  case 1:
795  case 3:
796  /* always apply 2 Y predictors on these iterations */
801  break;
802 
803  case 2:
804  /* this iteration might be C-Y-C-Y, Y-Y, or C-Y-Y
805  * depending on the macroblock type */
806  if (s->block_type == BLOCK_2x2) {
813  } else if (s->block_type == BLOCK_4x2) {
819  } else {
824  }
825  break;
826  }
827 
828  } else {
829 
830  /* skip (copy) four pixels, but reassign the horizontal
831  * predictor */
832  *vert_pred++ = *current_pixel_pair++;
833  horiz_pred = *current_pixel_pair - *vert_pred;
834  *vert_pred++ = *current_pixel_pair++;
835 
836  }
837 
838  if (!keyframe) {
839  mb_change_byte_mask <<= 1;
840 
841  /* next byte */
842  if (!mb_change_byte_mask) {
843  mb_change_byte = mb_change_bits[mb_change_index++];
844  mb_change_byte_mask = 0x01;
845  }
846  }
847 
848  pixels_left -= 2;
849  }
850 
851  /* next change row */
852  if (((y + 1) & 3) == 0)
853  mb_change_bits += s->mb_change_bits_row_size;
854 
855  current_line += s->frame->linesize[0];
856  }
857 }
858 
859 
861  void *data, int *got_frame,
862  AVPacket *avpkt)
863 {
864  const uint8_t *buf = avpkt->data;
865  int ret, buf_size = avpkt->size;
866  TrueMotion1Context *s = avctx->priv_data;
867 
868  s->buf = buf;
869  s->size = buf_size;
870 
871  if ((ret = truemotion1_decode_header(s)) < 0)
872  return ret;
873 
874  if ((ret = ff_reget_buffer(avctx, s->frame)) < 0) {
875  av_log(s->avctx, AV_LOG_ERROR, "get_buffer() failed\n");
876  return ret;
877  }
878 
879  if (compression_types[s->compression].algorithm == ALGO_RGB24H) {
881  } else if (compression_types[s->compression].algorithm != ALGO_NOP) {
883  }
884 
885  if ((ret = av_frame_ref(data, s->frame)) < 0)
886  return ret;
887 
888  *got_frame = 1;
889 
890  /* report that the buffer was completely consumed */
891  return buf_size;
892 }
893 
895 {
896  TrueMotion1Context *s = avctx->priv_data;
897 
898  av_frame_free(&s->frame);
899  av_free(s->vert_pred);
900 
901  return 0;
902 }
903 
905  .name = "truemotion1",
906  .long_name = NULL_IF_CONFIG_SMALL("Duck TrueMotion 1.0"),
907  .type = AVMEDIA_TYPE_VIDEO,
909  .priv_data_size = sizeof(TrueMotion1Context),
913  .capabilities = CODEC_CAP_DR1,
914 };
uint8_t version
Definition: truemotion1.c:95
uint8_t deltaset
Definition: truemotion1.c:90
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:54
This structure describes decoded (raw) audio or video data.
Definition: frame.h:135
int16_t fat_ydt[8]
Definition: truemotion1.c:72
int block_height
Definition: truemotion1.c:119
static const int16_t *const fat_ydts[]
misc image utilities
memory handling functions
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:133
#define OUTPUT_PIXEL_PAIR()
Definition: truemotion1.c:603
static void truemotion1_decode_16bit(TrueMotion1Context *s)
Definition: truemotion1.c:607
int size
Definition: avcodec.h:974
#define GET_NEXT_INDEX()
Definition: truemotion1.c:516
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:1445
enum AVPixelFormat pix_fmt
Pixel format, see AV_PIX_FMT_xxx.
Definition: avcodec.h:1270
#define AV_RL16
Definition: intreadwrite.h:42
static void gen_vector_table24(TrueMotion1Context *s, const uint8_t *sel_vector_table)
Definition: truemotion1.c:281
AVCodec.
Definition: avcodec.h:2812
AVCodec ff_truemotion1_decoder
Definition: truemotion1.c:904
static int truemotion1_decode_header(TrueMotion1Context *s)
Definition: truemotion1.c:310
int16_t cdt[8]
Definition: truemotion1.c:71
static int decode(MimicContext *ctx, int quality, int num_coeffs, int is_iframe)
Definition: mimic.c:275
void void avpriv_request_sample(void *avc, const char *msg,...) av_printf_format(2
Log a generic warning message about a missing feature.
const uint8_t * index_stream
Definition: truemotion1.c:54
uint8_t
#define av_cold
Definition: attributes.h:66
AVFrame * av_frame_alloc(void)
Allocate an AVFrame and set its fields to default values.
Definition: frame.c:57
#define FF_DEBUG_PICT_INFO
Definition: avcodec.h:2379
#define FLAG_KEYFRAME
Definition: truemotion1.c:83
#define b
Definition: input.c:52
int av_frame_ref(AVFrame *dst, const AVFrame *src)
Set up a new reference to the data described by the source frame.
Definition: frame.c:188
#define CODEC_CAP_DR1
Codec uses get_buffer() for allocating buffers and supports custom allocators.
Definition: avcodec.h:684
const char data[16]
Definition: mxf.c:70
uint8_t * data
Definition: avcodec.h:973
int ff_set_sar(AVCodecContext *avctx, AVRational sar)
Check that the provided sample aspect ratio is valid and set it on the codec context.
Definition: utils.c:145
#define FLAG_SPRITE
Definition: truemotion1.c:82
#define r
Definition: input.c:51
const uint8_t * buf
Definition: truemotion1.c:49
static av_cold int truemotion1_decode_end(AVCodecContext *avctx)
Definition: truemotion1.c:894
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:123
uint16_t yoffset
Definition: truemotion1.c:100
void av_free(void *ptr)
Free a memory block which has been allocated with av_malloc(z)() or av_realloc(). ...
Definition: mem.c:186
#define AVERROR(e)
Definition: error.h:43
void av_frame_free(AVFrame **frame)
Free the frame and any dynamically allocated objects in it, e.g.
Definition: frame.c:69
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:145
static void truemotion1_decode_24bit(TrueMotion1Context *s)
Definition: truemotion1.c:733
uint16_t xsize
Definition: truemotion1.c:93
void av_log(void *avcl, int level, const char *fmt,...)
Definition: log.c:169
const char * name
Name of the codec implementation.
Definition: avcodec.h:2819
#define BLOCK_4x2
Definition: truemotion1.c:113
static const uint8_t *const tables[]
static const uint8_t pc_tbl2[]
uint32_t c_predictor_table[1024]
Definition: truemotion1.c:61
common internal API header
int ff_reget_buffer(AVCodecContext *avctx, AVFrame *frame)
Identical in function to av_frame_make_writable(), except it uses ff_get_buffer() to allocate the buf...
Definition: utils.c:820
AVCodecContext * avctx
Definition: truemotion1.c:46
int width
picture width / height.
Definition: avcodec.h:1229
static int make_ydt15_entry(int p1, int p2, int16_t *ydt)
Definition: truemotion1.c:174
uint16_t height
Definition: truemotion1.c:102
unsigned int * vert_pred
Definition: truemotion1.c:77
static int make_cdt24_entry(int p1, int p2, int16_t *cdt)
Definition: truemotion1.c:230
static const comp_types compression_types[17]
Definition: truemotion1.c:124
#define APPLY_C_PREDICTOR_24()
Definition: truemotion1.c:551
#define ALGO_RGB16V
Definition: truemotion1.c:106
#define AVERROR_PATCHWELCOME
Not yet implemented in Libav, patches welcome.
Definition: error.h:57
#define ALGO_NOP
Definition: truemotion1.c:105
static int make_ydt24_entry(int p1, int p2, int16_t *ydt)
Definition: truemotion1.c:221
#define AV_LOG_INFO
Standard information.
Definition: log.h:134
uint8_t header_size
Definition: truemotion1.c:88
static const int16_t *const cdts[]
Libavcodec external API header.
static void gen_vector_table16(TrueMotion1Context *s, const uint8_t *sel_vector_table)
Definition: truemotion1.c:260
static const int16_t *const ydts[]
#define ALGO_RGB16H
Definition: truemotion1.c:107
int linesize[AV_NUM_DATA_POINTERS]
For video, size in bytes of each picture line.
Definition: frame.h:153
int debug
debug
Definition: avcodec.h:2378
main external API structure.
Definition: avcodec.h:1050
uint32_t fat_c_predictor_table[1024]
Definition: truemotion1.c:63
static void close(AVCodecParserContext *s)
Definition: h264_parser.c:490
#define AV_PIX_FMT_RGB32
Definition: pixfmt.h:222
#define ALGO_RGB24H
Definition: truemotion1.c:108
static int make_cdt15_entry(int p1, int p2, int16_t *cdt)
Definition: truemotion1.c:186
int index
Definition: gxfenc.c:72
rational number numerator/denominator
Definition: rational.h:43
int16_t fat_cdt[8]
Definition: truemotion1.c:73
int block_width
Definition: truemotion1.c:118
static av_cold int truemotion1_decode_init(AVCodecContext *avctx)
Definition: truemotion1.c:467
uint16_t width
Definition: truemotion1.c:101
int block_type
Definition: truemotion1.c:120
uint8_t vectable
Definition: truemotion1.c:91
static int truemotion1_decode_frame(AVCodecContext *avctx, void *data, int *got_frame, AVPacket *avpkt)
Definition: truemotion1.c:860
void av_frame_unref(AVFrame *frame)
Unreference all the buffers referenced by frame and reset the frame fields.
Definition: frame.c:283
#define APPLY_Y_PREDICTOR()
Definition: truemotion1.c:569
#define APPLY_C_PREDICTOR()
Definition: truemotion1.c:534
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
Definition: frame.h:141
void av_fast_malloc(void *ptr, unsigned int *size, size_t min_size)
Allocate a buffer, reusing the given one if large enough.
Definition: mem.c:388
uint16_t xoffset
Definition: truemotion1.c:99
common internal api header.
#define BLOCK_2x2
Definition: truemotion1.c:111
uint16_t checksum
Definition: truemotion1.c:94
static int make_ydt16_entry(int p1, int p2, int16_t *ydt)
Definition: truemotion1.c:199
uint8_t flags
Definition: truemotion1.c:97
uint8_t compression
Definition: truemotion1.c:89
static void gen_vector_table15(TrueMotion1Context *s, const uint8_t *sel_vector_table)
Definition: truemotion1.c:239
#define AV_PIX_FMT_RGB555
Definition: pixfmt.h:231
static int make_cdt16_entry(int p1, int p2, int16_t *cdt)
Definition: truemotion1.c:211
static av_cold int init(AVCodecParserContext *s)
Definition: h264_parser.c:499
void * priv_data
Definition: avcodec.h:1092
uint32_t fat_y_predictor_table[1024]
Definition: truemotion1.c:62
int len
#define FLAG_INTERFRAME
Definition: truemotion1.c:84
uint16_t ysize
Definition: truemotion1.c:92
uint8_t control
Definition: truemotion1.c:98
uint32_t y_predictor_table[1024]
Definition: truemotion1.c:60
static const int16_t *const fat_cdts[]
#define BLOCK_4x4
Definition: truemotion1.c:114
#define BLOCK_2x4
Definition: truemotion1.c:112
static void select_delta_tables(TrueMotion1Context *s, int delta_table_index)
Definition: truemotion1.c:148
#define APPLY_Y_PREDICTOR_24()
Definition: truemotion1.c:586
const uint8_t * mb_change_bits
Definition: truemotion1.c:52
#define FLAG_INTERPOLATED
Definition: truemotion1.c:85
This structure stores compressed data.
Definition: avcodec.h:950
int16_t ydt[8]
Definition: truemotion1.c:70
uint8_t header_type
Definition: truemotion1.c:96