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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 * (1 << 16))) * 2;
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 * (1 << 8)) + (hi * (1 << 16))) * 2;
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] * (1 << 16);
236  return (b+r) * 2;
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_0RGB32;
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  if (s->w & 1) {
406  avpriv_request_sample(s->avctx, "Frame with odd width");
407  return AVERROR_PATCHWELCOME;
408  }
409 
410  if (s->w != s->avctx->width || s->h != s->avctx->height ||
411  new_pix_fmt != s->avctx->pix_fmt) {
412  av_frame_unref(s->frame);
413  s->avctx->sample_aspect_ratio = (AVRational){ 1 << width_shift, 1 };
414  s->avctx->pix_fmt = new_pix_fmt;
415 
416  if ((ret = ff_set_dimensions(s->avctx, s->w, s->h)) < 0)
417  return ret;
418 
420 
421  av_fast_malloc(&s->vert_pred, &s->vert_pred_size, s->avctx->width * sizeof(unsigned int));
422  if (!s->vert_pred)
423  return AVERROR(ENOMEM);
424  }
425 
426  /* There is 1 change bit per 4 pixels, so each change byte represents
427  * 32 pixels; divide width by 4 to obtain the number of change bits and
428  * then round up to the nearest byte. */
429  s->mb_change_bits_row_size = ((s->avctx->width >> (2 - width_shift)) + 7) >> 3;
430 
431  if ((header.deltaset != s->last_deltaset) || (header.vectable != s->last_vectable))
432  {
433  if (compression_types[header.compression].algorithm == ALGO_RGB24H)
434  gen_vector_table24(s, sel_vector_table);
435  else
436  if (s->avctx->pix_fmt == AV_PIX_FMT_RGB555)
437  gen_vector_table15(s, sel_vector_table);
438  else
439  gen_vector_table16(s, sel_vector_table);
440  }
441 
442  /* set up pointers to the other key data chunks */
443  s->mb_change_bits = s->buf + header.header_size;
444  if (s->flags & FLAG_KEYFRAME) {
445  /* no change bits specified for a keyframe; only index bytes */
447  } else {
448  /* one change bit per 4x4 block */
449  s->index_stream = s->mb_change_bits +
450  (s->mb_change_bits_row_size * (s->avctx->height >> 2));
451  }
452  s->index_stream_size = s->size - (s->index_stream - s->buf);
453 
454  s->last_deltaset = header.deltaset;
455  s->last_vectable = header.vectable;
456  s->compression = header.compression;
457  s->block_width = compression_types[header.compression].block_width;
458  s->block_height = compression_types[header.compression].block_height;
459  s->block_type = compression_types[header.compression].block_type;
460 
461  if (s->avctx->debug & FF_DEBUG_PICT_INFO)
462  av_log(s->avctx, AV_LOG_INFO, "tables: %d / %d c:%d %dx%d t:%d %s%s%s%s\n",
464  s->block_height, s->block_type,
465  s->flags & FLAG_KEYFRAME ? " KEY" : "",
466  s->flags & FLAG_INTERFRAME ? " INTER" : "",
467  s->flags & FLAG_SPRITE ? " SPRITE" : "",
468  s->flags & FLAG_INTERPOLATED ? " INTERPOL" : "");
469 
470  return header.header_size;
471 }
472 
474 {
475  TrueMotion1Context *s = avctx->priv_data;
476 
477  s->avctx = avctx;
478 
479  // FIXME: it may change ?
480 // if (avctx->bits_per_sample == 24)
481 // avctx->pix_fmt = AV_PIX_FMT_RGB24;
482 // else
483 // avctx->pix_fmt = AV_PIX_FMT_RGB555;
484 
485  s->frame = av_frame_alloc();
486  if (!s->frame)
487  return AVERROR(ENOMEM);
488 
489  /* there is a vertical predictor for each pixel in a line; each vertical
490  * predictor is 0 to start with */
491  av_fast_malloc(&s->vert_pred, &s->vert_pred_size, s->avctx->width * sizeof(unsigned int));
492  if (!s->vert_pred) {
493  av_frame_free(&s->frame);
494  return AVERROR(ENOMEM);
495  }
496 
497  return 0;
498 }
499 
500 /*
501 Block decoding order:
502 
503 dxi: Y-Y
504 dxic: Y-C-Y
505 dxic2: Y-C-Y-C
506 
507 hres,vres,i,i%vres (0 < i < 4)
508 2x2 0: 0 dxic2
509 2x2 1: 1 dxi
510 2x2 2: 0 dxic2
511 2x2 3: 1 dxi
512 2x4 0: 0 dxic2
513 2x4 1: 1 dxi
514 2x4 2: 2 dxi
515 2x4 3: 3 dxi
516 4x2 0: 0 dxic
517 4x2 1: 1 dxi
518 4x2 2: 0 dxic
519 4x2 3: 1 dxi
520 4x4 0: 0 dxic
521 4x4 1: 1 dxi
522 4x4 2: 2 dxi
523 4x4 3: 3 dxi
524 */
525 
526 #define GET_NEXT_INDEX() \
527 {\
528  if (index_stream_index >= s->index_stream_size) { \
529  av_log(s->avctx, AV_LOG_INFO, " help! truemotion1 decoder went out of bounds\n"); \
530  return; \
531  } \
532  index = s->index_stream[index_stream_index++] * 4; \
533 }
534 
535 #define INC_INDEX \
536 do { \
537  if (index >= 1023) { \
538  av_log(s->avctx, AV_LOG_ERROR, "Invalid index value.\n"); \
539  return; \
540  } \
541  index++; \
542 } while (0)
543 
544 #define APPLY_C_PREDICTOR() \
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->c_predictor_table[index]; \
552  horiz_pred += ((predictor_pair >> 1) * 5); \
553  if (predictor_pair & 1) \
554  GET_NEXT_INDEX() \
555  else \
556  INC_INDEX; \
557  } \
558  } else \
559  INC_INDEX;
560 
561 #define APPLY_C_PREDICTOR_24() \
562  predictor_pair = s->c_predictor_table[index]; \
563  horiz_pred += (predictor_pair >> 1); \
564  if (predictor_pair & 1) { \
565  GET_NEXT_INDEX() \
566  if (!index) { \
567  GET_NEXT_INDEX() \
568  predictor_pair = s->fat_c_predictor_table[index]; \
569  horiz_pred += (predictor_pair >> 1); \
570  if (predictor_pair & 1) \
571  GET_NEXT_INDEX() \
572  else \
573  INC_INDEX; \
574  } \
575  } else \
576  INC_INDEX;
577 
578 
579 #define APPLY_Y_PREDICTOR() \
580  predictor_pair = s->y_predictor_table[index]; \
581  horiz_pred += (predictor_pair >> 1); \
582  if (predictor_pair & 1) { \
583  GET_NEXT_INDEX() \
584  if (!index) { \
585  GET_NEXT_INDEX() \
586  predictor_pair = s->y_predictor_table[index]; \
587  horiz_pred += ((predictor_pair >> 1) * 5); \
588  if (predictor_pair & 1) \
589  GET_NEXT_INDEX() \
590  else \
591  INC_INDEX; \
592  } \
593  } else \
594  INC_INDEX;
595 
596 #define APPLY_Y_PREDICTOR_24() \
597  predictor_pair = s->y_predictor_table[index]; \
598  horiz_pred += (predictor_pair >> 1); \
599  if (predictor_pair & 1) { \
600  GET_NEXT_INDEX() \
601  if (!index) { \
602  GET_NEXT_INDEX() \
603  predictor_pair = s->fat_y_predictor_table[index]; \
604  horiz_pred += (predictor_pair >> 1); \
605  if (predictor_pair & 1) \
606  GET_NEXT_INDEX() \
607  else \
608  INC_INDEX; \
609  } \
610  } else \
611  INC_INDEX;
612 
613 #define OUTPUT_PIXEL_PAIR() \
614  *current_pixel_pair = *vert_pred + horiz_pred; \
615  *vert_pred++ = *current_pixel_pair++;
616 
618 {
619  int y;
620  int pixels_left; /* remaining pixels on this line */
621  unsigned int predictor_pair;
622  unsigned int horiz_pred;
623  unsigned int *vert_pred;
624  unsigned int *current_pixel_pair;
625  unsigned char *current_line = s->frame->data[0];
626  int keyframe = s->flags & FLAG_KEYFRAME;
627 
628  /* these variables are for managing the stream of macroblock change bits */
629  const unsigned char *mb_change_bits = s->mb_change_bits;
630  unsigned char mb_change_byte;
631  unsigned char mb_change_byte_mask;
632  int mb_change_index;
633 
634  /* these variables are for managing the main index stream */
635  int index_stream_index = 0; /* yes, the index into the index stream */
636  int index;
637 
638  /* clean out the line buffer */
639  memset(s->vert_pred, 0, s->avctx->width * sizeof(unsigned int));
640 
641  GET_NEXT_INDEX();
642 
643  for (y = 0; y < s->avctx->height; y++) {
644 
645  /* re-init variables for the next line iteration */
646  horiz_pred = 0;
647  current_pixel_pair = (unsigned int *)current_line;
648  vert_pred = s->vert_pred;
649  mb_change_index = 0;
650  if (!keyframe)
651  mb_change_byte = mb_change_bits[mb_change_index++];
652  mb_change_byte_mask = 0x01;
653  pixels_left = s->avctx->width;
654 
655  while (pixels_left > 0) {
656 
657  if (keyframe || ((mb_change_byte & mb_change_byte_mask) == 0)) {
658 
659  switch (y & 3) {
660  case 0:
661  /* if macroblock width is 2, apply C-Y-C-Y; else
662  * apply C-Y-Y */
663  if (s->block_width == 2) {
670  } else {
676  }
677  break;
678 
679  case 1:
680  case 3:
681  /* always apply 2 Y predictors on these iterations */
686  break;
687 
688  case 2:
689  /* this iteration might be C-Y-C-Y, Y-Y, or C-Y-Y
690  * depending on the macroblock type */
691  if (s->block_type == BLOCK_2x2) {
698  } else if (s->block_type == BLOCK_4x2) {
704  } else {
709  }
710  break;
711  }
712 
713  } else {
714 
715  /* skip (copy) four pixels, but reassign the horizontal
716  * predictor */
717  *vert_pred++ = *current_pixel_pair++;
718  horiz_pred = *current_pixel_pair - *vert_pred;
719  *vert_pred++ = *current_pixel_pair++;
720 
721  }
722 
723  if (!keyframe) {
724  mb_change_byte_mask <<= 1;
725 
726  /* next byte */
727  if (!mb_change_byte_mask) {
728  mb_change_byte = mb_change_bits[mb_change_index++];
729  mb_change_byte_mask = 0x01;
730  }
731  }
732 
733  pixels_left -= 4;
734  }
735 
736  /* next change row */
737  if (((y + 1) & 3) == 0)
738  mb_change_bits += s->mb_change_bits_row_size;
739 
740  current_line += s->frame->linesize[0];
741  }
742 }
743 
745 {
746  int y;
747  int pixels_left; /* remaining pixels on this line */
748  unsigned int predictor_pair;
749  unsigned int horiz_pred;
750  unsigned int *vert_pred;
751  unsigned int *current_pixel_pair;
752  unsigned char *current_line = s->frame->data[0];
753  int keyframe = s->flags & FLAG_KEYFRAME;
754 
755  /* these variables are for managing the stream of macroblock change bits */
756  const unsigned char *mb_change_bits = s->mb_change_bits;
757  unsigned char mb_change_byte;
758  unsigned char mb_change_byte_mask;
759  int mb_change_index;
760 
761  /* these variables are for managing the main index stream */
762  int index_stream_index = 0; /* yes, the index into the index stream */
763  int index;
764 
765  /* clean out the line buffer */
766  memset(s->vert_pred, 0, s->avctx->width * sizeof(unsigned int));
767 
768  GET_NEXT_INDEX();
769 
770  for (y = 0; y < s->avctx->height; y++) {
771 
772  /* re-init variables for the next line iteration */
773  horiz_pred = 0;
774  current_pixel_pair = (unsigned int *)current_line;
775  vert_pred = s->vert_pred;
776  mb_change_index = 0;
777  mb_change_byte = mb_change_bits[mb_change_index++];
778  mb_change_byte_mask = 0x01;
779  pixels_left = s->avctx->width;
780 
781  while (pixels_left > 0) {
782 
783  if (keyframe || ((mb_change_byte & mb_change_byte_mask) == 0)) {
784 
785  switch (y & 3) {
786  case 0:
787  /* if macroblock width is 2, apply C-Y-C-Y; else
788  * apply C-Y-Y */
789  if (s->block_width == 2) {
796  } else {
802  }
803  break;
804 
805  case 1:
806  case 3:
807  /* always apply 2 Y predictors on these iterations */
812  break;
813 
814  case 2:
815  /* this iteration might be C-Y-C-Y, Y-Y, or C-Y-Y
816  * depending on the macroblock type */
817  if (s->block_type == BLOCK_2x2) {
824  } else if (s->block_type == BLOCK_4x2) {
830  } else {
835  }
836  break;
837  }
838 
839  } else {
840 
841  /* skip (copy) four pixels, but reassign the horizontal
842  * predictor */
843  *vert_pred++ = *current_pixel_pair++;
844  horiz_pred = *current_pixel_pair - *vert_pred;
845  *vert_pred++ = *current_pixel_pair++;
846 
847  }
848 
849  if (!keyframe) {
850  mb_change_byte_mask <<= 1;
851 
852  /* next byte */
853  if (!mb_change_byte_mask) {
854  mb_change_byte = mb_change_bits[mb_change_index++];
855  mb_change_byte_mask = 0x01;
856  }
857  }
858 
859  pixels_left -= 2;
860  }
861 
862  /* next change row */
863  if (((y + 1) & 3) == 0)
864  mb_change_bits += s->mb_change_bits_row_size;
865 
866  current_line += s->frame->linesize[0];
867  }
868 }
869 
870 
872  void *data, int *got_frame,
873  AVPacket *avpkt)
874 {
875  const uint8_t *buf = avpkt->data;
876  int ret, buf_size = avpkt->size;
877  TrueMotion1Context *s = avctx->priv_data;
878 
879  s->buf = buf;
880  s->size = buf_size;
881 
882  if ((ret = truemotion1_decode_header(s)) < 0)
883  return ret;
884 
885  if ((ret = ff_reget_buffer(avctx, s->frame)) < 0)
886  return ret;
887 
888  if (compression_types[s->compression].algorithm == ALGO_RGB24H) {
890  } else if (compression_types[s->compression].algorithm != ALGO_NOP) {
892  }
893 
894  if ((ret = av_frame_ref(data, s->frame)) < 0)
895  return ret;
896 
897  *got_frame = 1;
898 
899  /* report that the buffer was completely consumed */
900  return buf_size;
901 }
902 
904 {
905  TrueMotion1Context *s = avctx->priv_data;
906 
907  av_frame_free(&s->frame);
908  av_freep(&s->vert_pred);
909 
910  return 0;
911 }
912 
914  .name = "truemotion1",
915  .long_name = NULL_IF_CONFIG_SMALL("Duck TrueMotion 1.0"),
916  .type = AVMEDIA_TYPE_VIDEO,
918  .priv_data_size = sizeof(TrueMotion1Context),
920  .close = truemotion1_decode_end,
922  .capabilities = AV_CODEC_CAP_DR1,
923 };
uint8_t version
Definition: truemotion1.c:95
uint8_t deltaset
Definition: truemotion1.c:90
const char * s
Definition: avisynth_c.h:768
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:59
This structure describes decoded (raw) audio or video data.
Definition: frame.h:190
int16_t fat_ydt[8]
Definition: truemotion1.c:72
int block_height
Definition: truemotion1.c:119
ptrdiff_t const GLvoid * data
Definition: opengl_enc.c:101
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:210
static av_cold int init(AVCodecContext *avctx)
Definition: avrndec.c:35
#define OUTPUT_PIXEL_PAIR()
Definition: truemotion1.c:613
static void truemotion1_decode_16bit(TrueMotion1Context *s)
Definition: truemotion1.c:617
int size
Definition: avcodec.h:1617
const char * b
Definition: vf_curves.c:113
#define GET_NEXT_INDEX()
Definition: truemotion1.c:526
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:2102
enum AVPixelFormat pix_fmt
Pixel format, see AV_PIX_FMT_xxx.
Definition: avcodec.h:1919
static void gen_vector_table24(TrueMotion1Context *s, const uint8_t *sel_vector_table)
Definition: truemotion1.c:281
AVCodec.
Definition: avcodec.h:3646
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_WL32 unsigned int_TMPL AV_WL24 unsigned int_TMPL AV_RL16
Definition: bytestream.h:87
AVCodec ff_truemotion1_decoder
Definition: truemotion1.c:913
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_cold
Definition: attributes.h:82
AVFrame * av_frame_alloc(void)
Allocate an AVFrame and set its fields to default values.
Definition: frame.c:145
#define FF_DEBUG_PICT_INFO
Definition: avcodec.h:2933
#define FLAG_KEYFRAME
Definition: truemotion1.c:83
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:392
uint8_t * data
Definition: avcodec.h:1616
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:225
#define FLAG_SPRITE
Definition: truemotion1.c:82
#define av_log(a,...)
const uint8_t * buf
Definition: truemotion1.c:49
static av_cold int truemotion1_decode_end(AVCodecContext *avctx)
Definition: truemotion1.c:903
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:176
uint16_t yoffset
Definition: truemotion1.c:100
#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:158
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:180
const char * r
Definition: vf_curves.c:111
static void truemotion1_decode_24bit(TrueMotion1Context *s)
Definition: truemotion1.c:744
uint16_t xsize
Definition: truemotion1.c:93
const char * name
Name of the codec implementation.
Definition: avcodec.h:3653
#define BLOCK_4x2
Definition: truemotion1.c:113
static const uint8_t *const tables[]
static const uint8_t pc_tbl2[]
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:499
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:1002
AVCodecContext * avctx
Definition: truemotion1.c:46
int width
picture width / height.
Definition: avcodec.h:1878
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:561
#define ALGO_RGB16V
Definition: truemotion1.c:106
#define AVERROR_PATCHWELCOME
Not yet implemented in FFmpeg, patches welcome.
Definition: error.h:62
#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:187
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:221
int debug
debug
Definition: avcodec.h:2932
main external API structure.
Definition: avcodec.h:1691
uint32_t fat_c_predictor_table[1024]
Definition: truemotion1.c:63
#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:690
int index
Definition: gxfenc.c:89
Rational number (pair of numerator and denominator).
Definition: rational.h:58
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:473
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:871
void av_frame_unref(AVFrame *frame)
Unreference all the buffers referenced by frame and reset the frame fields.
Definition: frame.c:502
#define APPLY_Y_PREDICTOR()
Definition: truemotion1.c:579
#define APPLY_C_PREDICTOR()
Definition: truemotion1.c:544
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
Definition: frame.h:204
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:339
static int make_cdt16_entry(int p1, int p2, int16_t *cdt)
Definition: truemotion1.c:211
void * priv_data
Definition: avcodec.h:1733
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 av_freep(p)
#define BLOCK_4x4
Definition: truemotion1.c:114
static int decode(AVCodecContext *avctx, AVFrame *frame, int *got_frame, AVPacket *pkt)
Definition: ffmpeg.c:2045
#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:596
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:1593
#define AV_CODEC_CAP_DR1
Codec uses get_buffer() for allocating buffers and supports custom allocators.
Definition: avcodec.h:968
int16_t ydt[8]
Definition: truemotion1.c:70
#define AV_PIX_FMT_0RGB32
Definition: pixfmt.h:330
uint8_t header_type
Definition: truemotion1.c:96