FFmpeg  2.1.1
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 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  * Duck TrueMotion v1 Video Decoder by
25  * Alex Beregszaszi and
26  * Mike Melanson (melanson@pcisys.net)
27  *
28  * The TrueMotion v1 decoder presently only decodes 16-bit TM1 data and
29  * outputs RGB555 (or RGB565) data. 24-bit TM1 data is not supported yet.
30  */
31 
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 || header.header_size >= s->size)
321  {
322  av_log(s->avctx, AV_LOG_ERROR, "invalid header size (%d)\n", s->buf[0]);
323  return AVERROR_INVALIDDATA;
324  }
325 
326  /* unscramble the header bytes with a XOR operation */
327  for (i = 1; i < header.header_size; i++)
328  header_buffer[i - 1] = s->buf[i] ^ s->buf[i + 1];
329 
330  header.compression = header_buffer[0];
331  header.deltaset = header_buffer[1];
332  header.vectable = header_buffer[2];
333  header.ysize = AV_RL16(&header_buffer[3]);
334  header.xsize = AV_RL16(&header_buffer[5]);
335  header.checksum = AV_RL16(&header_buffer[7]);
336  header.version = header_buffer[9];
337  header.header_type = header_buffer[10];
338  header.flags = header_buffer[11];
339  header.control = header_buffer[12];
340 
341  /* Version 2 */
342  if (header.version >= 2)
343  {
344  if (header.header_type > 3)
345  {
346  av_log(s->avctx, AV_LOG_ERROR, "invalid header type (%d)\n", header.header_type);
347  return AVERROR_INVALIDDATA;
348  } else if ((header.header_type == 2) || (header.header_type == 3)) {
349  s->flags = header.flags;
350  if (!(s->flags & FLAG_INTERFRAME))
351  s->flags |= FLAG_KEYFRAME;
352  } else
353  s->flags = FLAG_KEYFRAME;
354  } else /* Version 1 */
355  s->flags = FLAG_KEYFRAME;
356 
357  if (s->flags & FLAG_SPRITE) {
358  avpriv_request_sample(s->avctx, "Frame with sprite");
359  /* FIXME header.width, height, xoffset and yoffset aren't initialized */
360  return AVERROR_PATCHWELCOME;
361  } else {
362  s->w = header.xsize;
363  s->h = header.ysize;
364  if (header.header_type < 2) {
365  if ((s->w < 213) && (s->h >= 176))
366  {
367  s->flags |= FLAG_INTERPOLATED;
368  avpriv_request_sample(s->avctx, "Interpolated frame");
369  }
370  }
371  }
372 
373  if (header.compression >= 17) {
374  av_log(s->avctx, AV_LOG_ERROR, "invalid compression type (%d)\n", header.compression);
375  return AVERROR_INVALIDDATA;
376  }
377 
378  if ((header.deltaset != s->last_deltaset) ||
379  (header.vectable != s->last_vectable))
380  select_delta_tables(s, header.deltaset);
381 
382  if ((header.compression & 1) && header.header_type)
383  sel_vector_table = pc_tbl2;
384  else {
385  if (header.vectable > 0 && header.vectable < 4)
386  sel_vector_table = tables[header.vectable - 1];
387  else {
388  av_log(s->avctx, AV_LOG_ERROR, "invalid vector table id (%d)\n", header.vectable);
389  return AVERROR_INVALIDDATA;
390  }
391  }
392 
393  if (compression_types[header.compression].algorithm == ALGO_RGB24H) {
394  new_pix_fmt = AV_PIX_FMT_RGB32;
395  width_shift = 1;
396  } else
397  new_pix_fmt = AV_PIX_FMT_RGB555; // RGB565 is supported as well
398 
399  s->w >>= width_shift;
400  if ((ret = av_image_check_size(s->w, s->h, 0, s->avctx)) < 0)
401  return ret;
402 
403  if (s->w != s->avctx->width || s->h != s->avctx->height ||
404  new_pix_fmt != s->avctx->pix_fmt) {
405  av_frame_unref(&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  if (!s->vert_pred)
411  return AVERROR(ENOMEM);
412  }
413 
414  /* There is 1 change bit per 4 pixels, so each change byte represents
415  * 32 pixels; divide width by 4 to obtain the number of change bits and
416  * then round up to the nearest byte. */
417  s->mb_change_bits_row_size = ((s->avctx->width >> (2 - width_shift)) + 7) >> 3;
418 
419  if ((header.deltaset != s->last_deltaset) || (header.vectable != s->last_vectable))
420  {
421  if (compression_types[header.compression].algorithm == ALGO_RGB24H)
422  gen_vector_table24(s, sel_vector_table);
423  else
424  if (s->avctx->pix_fmt == AV_PIX_FMT_RGB555)
425  gen_vector_table15(s, sel_vector_table);
426  else
427  gen_vector_table16(s, sel_vector_table);
428  }
429 
430  /* set up pointers to the other key data chunks */
431  s->mb_change_bits = s->buf + header.header_size;
432  if (s->flags & FLAG_KEYFRAME) {
433  /* no change bits specified for a keyframe; only index bytes */
435  } else {
436  /* one change bit per 4x4 block */
437  s->index_stream = s->mb_change_bits +
438  (s->mb_change_bits_row_size * (s->avctx->height >> 2));
439  }
440  s->index_stream_size = s->size - (s->index_stream - s->buf);
441 
442  s->last_deltaset = header.deltaset;
443  s->last_vectable = header.vectable;
444  s->compression = header.compression;
445  s->block_width = compression_types[header.compression].block_width;
446  s->block_height = compression_types[header.compression].block_height;
447  s->block_type = compression_types[header.compression].block_type;
448 
449  if (s->avctx->debug & FF_DEBUG_PICT_INFO)
450  av_log(s->avctx, AV_LOG_INFO, "tables: %d / %d c:%d %dx%d t:%d %s%s%s%s\n",
452  s->block_height, s->block_type,
453  s->flags & FLAG_KEYFRAME ? " KEY" : "",
454  s->flags & FLAG_INTERFRAME ? " INTER" : "",
455  s->flags & FLAG_SPRITE ? " SPRITE" : "",
456  s->flags & FLAG_INTERPOLATED ? " INTERPOL" : "");
457 
458  return header.header_size;
459 }
460 
462 {
463  TrueMotion1Context *s = avctx->priv_data;
464 
465  s->avctx = avctx;
466 
467  // FIXME: it may change ?
468 // if (avctx->bits_per_sample == 24)
469 // avctx->pix_fmt = AV_PIX_FMT_RGB24;
470 // else
471 // avctx->pix_fmt = AV_PIX_FMT_RGB555;
472 
474 
475  /* there is a vertical predictor for each pixel in a line; each vertical
476  * predictor is 0 to start with */
477  av_fast_malloc(&s->vert_pred, &s->vert_pred_size, s->avctx->width * sizeof(unsigned int));
478  if (!s->vert_pred)
479  return AVERROR(ENOMEM);
480 
481  return 0;
482 }
483 
484 /*
485 Block decoding order:
486 
487 dxi: Y-Y
488 dxic: Y-C-Y
489 dxic2: Y-C-Y-C
490 
491 hres,vres,i,i%vres (0 < i < 4)
492 2x2 0: 0 dxic2
493 2x2 1: 1 dxi
494 2x2 2: 0 dxic2
495 2x2 3: 1 dxi
496 2x4 0: 0 dxic2
497 2x4 1: 1 dxi
498 2x4 2: 2 dxi
499 2x4 3: 3 dxi
500 4x2 0: 0 dxic
501 4x2 1: 1 dxi
502 4x2 2: 0 dxic
503 4x2 3: 1 dxi
504 4x4 0: 0 dxic
505 4x4 1: 1 dxi
506 4x4 2: 2 dxi
507 4x4 3: 3 dxi
508 */
509 
510 #define GET_NEXT_INDEX() \
511 {\
512  if (index_stream_index >= s->index_stream_size) { \
513  av_log(s->avctx, AV_LOG_INFO, " help! truemotion1 decoder went out of bounds\n"); \
514  return; \
515  } \
516  index = s->index_stream[index_stream_index++] * 4; \
517 }
518 
519 #define APPLY_C_PREDICTOR() \
520  if(index > 1023){\
521  av_log(s->avctx, AV_LOG_ERROR, " index %d went out of bounds\n", index); \
522  return; \
523  }\
524  predictor_pair = s->c_predictor_table[index]; \
525  horiz_pred += (predictor_pair >> 1); \
526  if (predictor_pair & 1) { \
527  GET_NEXT_INDEX() \
528  if (!index) { \
529  GET_NEXT_INDEX() \
530  predictor_pair = s->c_predictor_table[index]; \
531  horiz_pred += ((predictor_pair >> 1) * 5); \
532  if (predictor_pair & 1) \
533  GET_NEXT_INDEX() \
534  else \
535  index++; \
536  } \
537  } else \
538  index++;
539 
540 #define APPLY_C_PREDICTOR_24() \
541  if(index > 1023){\
542  av_log(s->avctx, AV_LOG_ERROR, " index %d went out of bounds\n", index); \
543  return; \
544  }\
545  predictor_pair = s->c_predictor_table[index]; \
546  horiz_pred += (predictor_pair >> 1); \
547  if (predictor_pair & 1) { \
548  GET_NEXT_INDEX() \
549  if (!index) { \
550  GET_NEXT_INDEX() \
551  predictor_pair = s->fat_c_predictor_table[index]; \
552  horiz_pred += (predictor_pair >> 1); \
553  if (predictor_pair & 1) \
554  GET_NEXT_INDEX() \
555  else \
556  index++; \
557  } \
558  } else \
559  index++;
560 
561 
562 #define APPLY_Y_PREDICTOR() \
563  if(index > 1023){\
564  av_log(s->avctx, AV_LOG_ERROR, " index %d went out of bounds\n", index); \
565  return; \
566  }\
567  predictor_pair = s->y_predictor_table[index]; \
568  horiz_pred += (predictor_pair >> 1); \
569  if (predictor_pair & 1) { \
570  GET_NEXT_INDEX() \
571  if (!index) { \
572  GET_NEXT_INDEX() \
573  predictor_pair = s->y_predictor_table[index]; \
574  horiz_pred += ((predictor_pair >> 1) * 5); \
575  if (predictor_pair & 1) \
576  GET_NEXT_INDEX() \
577  else \
578  index++; \
579  } \
580  } else \
581  index++;
582 
583 #define APPLY_Y_PREDICTOR_24() \
584  if(index > 1023){\
585  av_log(s->avctx, AV_LOG_ERROR, " index %d went out of bounds\n", index); \
586  return; \
587  }\
588  predictor_pair = s->y_predictor_table[index]; \
589  horiz_pred += (predictor_pair >> 1); \
590  if (predictor_pair & 1) { \
591  GET_NEXT_INDEX() \
592  if (!index) { \
593  GET_NEXT_INDEX() \
594  predictor_pair = s->fat_y_predictor_table[index]; \
595  horiz_pred += (predictor_pair >> 1); \
596  if (predictor_pair & 1) \
597  GET_NEXT_INDEX() \
598  else \
599  index++; \
600  } \
601  } else \
602  index++;
603 
604 #define OUTPUT_PIXEL_PAIR() \
605  *current_pixel_pair = *vert_pred + horiz_pred; \
606  *vert_pred++ = *current_pixel_pair++;
607 
609 {
610  int y;
611  int pixels_left; /* remaining pixels on this line */
612  unsigned int predictor_pair;
613  unsigned int horiz_pred;
614  unsigned int *vert_pred;
615  unsigned int *current_pixel_pair;
616  unsigned char *current_line = s->frame.data[0];
617  int keyframe = s->flags & FLAG_KEYFRAME;
618 
619  /* these variables are for managing the stream of macroblock change bits */
620  const unsigned char *mb_change_bits = s->mb_change_bits;
621  unsigned char mb_change_byte;
622  unsigned char mb_change_byte_mask;
623  int mb_change_index;
624 
625  /* these variables are for managing the main index stream */
626  int index_stream_index = 0; /* yes, the index into the index stream */
627  int index;
628 
629  /* clean out the line buffer */
630  memset(s->vert_pred, 0, s->avctx->width * sizeof(unsigned int));
631 
632  GET_NEXT_INDEX();
633 
634  for (y = 0; y < s->avctx->height; y++) {
635 
636  /* re-init variables for the next line iteration */
637  horiz_pred = 0;
638  current_pixel_pair = (unsigned int *)current_line;
639  vert_pred = s->vert_pred;
640  mb_change_index = 0;
641  mb_change_byte = mb_change_bits[mb_change_index++];
642  mb_change_byte_mask = 0x01;
643  pixels_left = s->avctx->width;
644 
645  while (pixels_left > 0) {
646 
647  if (keyframe || ((mb_change_byte & mb_change_byte_mask) == 0)) {
648 
649  switch (y & 3) {
650  case 0:
651  /* if macroblock width is 2, apply C-Y-C-Y; else
652  * apply C-Y-Y */
653  if (s->block_width == 2) {
660  } else {
666  }
667  break;
668 
669  case 1:
670  case 3:
671  /* always apply 2 Y predictors on these iterations */
676  break;
677 
678  case 2:
679  /* this iteration might be C-Y-C-Y, Y-Y, or C-Y-Y
680  * depending on the macroblock type */
681  if (s->block_type == BLOCK_2x2) {
688  } else if (s->block_type == BLOCK_4x2) {
694  } else {
699  }
700  break;
701  }
702 
703  } else {
704 
705  /* skip (copy) four pixels, but reassign the horizontal
706  * predictor */
707  *vert_pred++ = *current_pixel_pair++;
708  horiz_pred = *current_pixel_pair - *vert_pred;
709  *vert_pred++ = *current_pixel_pair++;
710 
711  }
712 
713  if (!keyframe) {
714  mb_change_byte_mask <<= 1;
715 
716  /* next byte */
717  if (!mb_change_byte_mask) {
718  mb_change_byte = mb_change_bits[mb_change_index++];
719  mb_change_byte_mask = 0x01;
720  }
721  }
722 
723  pixels_left -= 4;
724  }
725 
726  /* next change row */
727  if (((y + 1) & 3) == 0)
728  mb_change_bits += s->mb_change_bits_row_size;
729 
730  current_line += s->frame.linesize[0];
731  }
732 }
733 
735 {
736  int y;
737  int pixels_left; /* remaining pixels on this line */
738  unsigned int predictor_pair;
739  unsigned int horiz_pred;
740  unsigned int *vert_pred;
741  unsigned int *current_pixel_pair;
742  unsigned char *current_line = s->frame.data[0];
743  int keyframe = s->flags & FLAG_KEYFRAME;
744 
745  /* these variables are for managing the stream of macroblock change bits */
746  const unsigned char *mb_change_bits = s->mb_change_bits;
747  unsigned char mb_change_byte;
748  unsigned char mb_change_byte_mask;
749  int mb_change_index;
750 
751  /* these variables are for managing the main index stream */
752  int index_stream_index = 0; /* yes, the index into the index stream */
753  int index;
754 
755  /* clean out the line buffer */
756  memset(s->vert_pred, 0, s->avctx->width * sizeof(unsigned int));
757 
758  GET_NEXT_INDEX();
759 
760  for (y = 0; y < s->avctx->height; y++) {
761 
762  /* re-init variables for the next line iteration */
763  horiz_pred = 0;
764  current_pixel_pair = (unsigned int *)current_line;
765  vert_pred = s->vert_pred;
766  mb_change_index = 0;
767  mb_change_byte = mb_change_bits[mb_change_index++];
768  mb_change_byte_mask = 0x01;
769  pixels_left = s->avctx->width;
770 
771  while (pixels_left > 0) {
772 
773  if (keyframe || ((mb_change_byte & mb_change_byte_mask) == 0)) {
774 
775  switch (y & 3) {
776  case 0:
777  /* if macroblock width is 2, apply C-Y-C-Y; else
778  * apply C-Y-Y */
779  if (s->block_width == 2) {
786  } else {
792  }
793  break;
794 
795  case 1:
796  case 3:
797  /* always apply 2 Y predictors on these iterations */
802  break;
803 
804  case 2:
805  /* this iteration might be C-Y-C-Y, Y-Y, or C-Y-Y
806  * depending on the macroblock type */
807  if (s->block_type == BLOCK_2x2) {
814  } else if (s->block_type == BLOCK_4x2) {
820  } else {
825  }
826  break;
827  }
828 
829  } else {
830 
831  /* skip (copy) four pixels, but reassign the horizontal
832  * predictor */
833  *vert_pred++ = *current_pixel_pair++;
834  horiz_pred = *current_pixel_pair - *vert_pred;
835  *vert_pred++ = *current_pixel_pair++;
836 
837  }
838 
839  if (!keyframe) {
840  mb_change_byte_mask <<= 1;
841 
842  /* next byte */
843  if (!mb_change_byte_mask) {
844  mb_change_byte = mb_change_bits[mb_change_index++];
845  mb_change_byte_mask = 0x01;
846  }
847  }
848 
849  pixels_left -= 2;
850  }
851 
852  /* next change row */
853  if (((y + 1) & 3) == 0)
854  mb_change_bits += s->mb_change_bits_row_size;
855 
856  current_line += s->frame.linesize[0];
857  }
858 }
859 
860 
862  void *data, int *got_frame,
863  AVPacket *avpkt)
864 {
865  const uint8_t *buf = avpkt->data;
866  int ret, buf_size = avpkt->size;
867  TrueMotion1Context *s = avctx->priv_data;
868 
869  s->buf = buf;
870  s->size = buf_size;
871 
872  if ((ret = truemotion1_decode_header(s)) < 0)
873  return ret;
874 
875  if ((ret = ff_reget_buffer(avctx, &s->frame)) < 0)
876  return ret;
877 
878  if (compression_types[s->compression].algorithm == ALGO_RGB24H) {
880  } else if (compression_types[s->compression].algorithm != ALGO_NOP) {
882  }
883 
884  if ((ret = av_frame_ref(data, &s->frame)) < 0)
885  return ret;
886 
887  *got_frame = 1;
888 
889  /* report that the buffer was completely consumed */
890  return buf_size;
891 }
892 
894 {
895  TrueMotion1Context *s = avctx->priv_data;
896 
897  av_frame_unref(&s->frame);
898  av_freep(&s->vert_pred);
899 
900  return 0;
901 }
902 
904  .name = "truemotion1",
905  .long_name = NULL_IF_CONFIG_SMALL("Duck TrueMotion 1.0"),
906  .type = AVMEDIA_TYPE_VIDEO,
908  .priv_data_size = sizeof(TrueMotion1Context),
912  .capabilities = CODEC_CAP_DR1,
913 };
uint8_t version
Definition: truemotion1.c:95
uint8_t deltaset
Definition: truemotion1.c:90
const char * s
Definition: avisynth_c.h:668
#define AVERROR_PATCHWELCOME
This structure describes decoded (raw) audio or video data.
Definition: frame.h:96
int16_t fat_ydt[8]
Definition: truemotion1.c:72
int block_height
Definition: truemotion1.c:119
static const int16_t *const fat_ydts[]
static av_cold int init(AVCodecContext *avctx)
Definition: avrndec.c:35
#define OUTPUT_PIXEL_PAIR()
Definition: truemotion1.c:604
#define AV_RL16(x)
Definition: intreadwrite.h:245
static void truemotion1_decode_16bit(TrueMotion1Context *s)
Definition: truemotion1.c:608
void avcodec_set_dimensions(AVCodecContext *s, int width, int height)
Definition: utils.c:233
int size
Definition: avcodec.h:1064
const char * b
Definition: vf_curves.c:105
#define GET_NEXT_INDEX()
Definition: truemotion1.c:510
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:1517
void av_log(void *avcl, int level, const char *fmt,...) av_printf_format(3
Send the specified message to the log if the level is less than or equal to the current av_log_level...
enum AVPixelFormat pix_fmt
Pixel format, see AV_PIX_FMT_xxx.
Definition: avcodec.h:1342
static void gen_vector_table24(TrueMotion1Context *s, const uint8_t *sel_vector_table)
Definition: truemotion1.c:281
AVCodec.
Definition: avcodec.h:2922
#define av_cold
Definition: avcodec.h:653
AVCodec ff_truemotion1_decoder
Definition: truemotion1.c:903
void av_freep(void *ptr)
Free a memory block which has been allocated with av_malloc(z)() or av_realloc() and set the pointer ...
Definition: mem.c:234
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:153
static int truemotion1_decode_header(TrueMotion1Context *s)
Definition: truemotion1.c:310
int16_t cdt[8]
Definition: truemotion1.c:71
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_PIX_FMT_RGB555
Definition: avcodec.h:4938
#define FLAG_KEYFRAME
Definition: truemotion1.c:83
const char * name
Name of the codec implementation.
Definition: avcodec.h:2929
int av_frame_ref(AVFrame *dst, AVFrame *src)
Setup a new reference to the data described by a given frame.
Definition: frame.c:247
#define CODEC_CAP_DR1
Codec uses get_buffer() for allocating buffers and supports custom allocators.
Definition: avcodec.h:742
const char data[16]
Definition: mxf.c:68
#define FLAG_SPRITE
Definition: truemotion1.c:82
const uint8_t * buf
Definition: truemotion1.c:49
static av_cold int truemotion1_decode_end(AVCodecContext *avctx)
Definition: truemotion1.c:893
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: avcodec.h:4147
uint16_t yoffset
Definition: truemotion1.c:100
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:151
const char * r
Definition: vf_curves.c:103
static void truemotion1_decode_24bit(TrueMotion1Context *s)
Definition: truemotion1.c:734
uint16_t xsize
Definition: truemotion1.c:93
Libavcodec external API header.
#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 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:231
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:986
void av_frame_unref(AVFrame *frame)
Unreference all the buffers referenced by frame and reset the frame fields.
Definition: frame.c:351
float y
AVCodecContext * avctx
Definition: truemotion1.c:46
ret
Definition: avfilter.c:961
int width
picture width / height.
Definition: avcodec.h:1314
static int make_ydt15_entry(int p1, int p2, int16_t *ydt)
Definition: truemotion1.c:174
uint16_t height
Definition: truemotion1.c:102
#define AV_PIX_FMT_RGB32
Definition: avcodec.h:4928
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:540
#define ALGO_RGB16V
Definition: truemotion1.c:106
#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: avcodec.h:4158
uint8_t header_size
Definition: truemotion1.c:88
static const int16_t *const cdts[]
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 debug
debug
Definition: avcodec.h:2442
main external API structure.
Definition: avcodec.h:1146
uint32_t fat_c_predictor_table[1024]
Definition: truemotion1.c:63
static void close(AVCodecParserContext *s)
Definition: h264_parser.c:538
#define ALGO_RGB24H
Definition: truemotion1.c:108
static int make_cdt15_entry(int p1, int p2, int16_t *cdt)
Definition: truemotion1.c:186
void * buf
Definition: avisynth_c.h:594
void avcodec_get_frame_defaults(AVFrame *frame)
Set the fields of the given AVFrame to default values.
Definition: utils.c:1046
int index
Definition: gxfenc.c:89
rational number numerator/denominator
Definition: rational.h:43
uint8_t * data
Definition: avcodec.h:1063
int linesize[AV_NUM_DATA_POINTERS]
For video, size in bytes of each picture line.
Definition: frame.h:124
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:461
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:861
void * priv_data
Definition: avcodec.h:1182
#define FF_DEBUG_PICT_INFO
Definition: avcodec.h:2443
#define APPLY_Y_PREDICTOR()
Definition: truemotion1.c:562
#define APPLY_C_PREDICTOR()
Definition: truemotion1.c:519
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
static int make_cdt16_entry(int p1, int p2, int16_t *cdt)
Definition: truemotion1.c:211
uint32_t fat_y_predictor_table[1024]
Definition: truemotion1.c:62
#define AVERROR_INVALIDDATA
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
#define AVERROR(e)
static const int16_t *const fat_cdts[]
#define BLOCK_4x4
Definition: truemotion1.c:114
static int decode(AVCodecContext *avctx, void *data, int *got_frame, AVPacket *avpkt)
Definition: crystalhd.c:868
#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:583
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:1040
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
Definition: frame.h:107
int16_t ydt[8]
Definition: truemotion1.c:70
uint8_t header_type
Definition: truemotion1.c:96