FFmpeg  4.4.5
interplayvideo.c
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1 /*
2  * Interplay MVE Video Decoder
3  * Copyright (C) 2003 The FFmpeg project
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  * Interplay MVE Video Decoder by Mike Melanson (melanson@pcisys.net)
25  * For more information about the Interplay MVE format, visit:
26  * http://www.pcisys.net/~melanson/codecs/interplay-mve.txt
27  * This code is written in such a way that the identifiers match up
28  * with the encoding descriptions in the document.
29  *
30  * This decoder presently only supports a PAL8 output colorspace.
31  *
32  * An Interplay video frame consists of 2 parts: The decoding map and
33  * the video data. A demuxer must load these 2 parts together in a single
34  * buffer before sending it through the stream to this decoder.
35  */
36 
37 #include <stdio.h>
38 #include <stdlib.h>
39 #include <string.h>
40 
41 #include "libavutil/intreadwrite.h"
42 
43 #define BITSTREAM_READER_LE
44 #include "avcodec.h"
45 #include "bytestream.h"
46 #include "get_bits.h"
47 #include "hpeldsp.h"
48 #include "internal.h"
49 
50 #define PALETTE_COUNT 256
51 
52 typedef struct IpvideoContext {
53 
58 
59  /* For format 0x10 */
62 
63  const unsigned char *decoding_map;
65  const unsigned char *skip_map;
67 
68  int is_16bpp;
70  unsigned char *pixel_ptr;
71  int line_inc;
72  int stride;
74 
75  uint32_t pal[256];
77 
78 static int copy_from(IpvideoContext *s, AVFrame *src, AVFrame *dst, int delta_x, int delta_y)
79 {
80  int width = dst->width;
81  int current_offset = s->pixel_ptr - dst->data[0];
82  int x = (current_offset % dst->linesize[0]) / (1 + s->is_16bpp);
83  int y = current_offset / dst->linesize[0];
84  int dx = delta_x + x - ((delta_x + x >= width) - (delta_x + x < 0)) * width;
85  int dy = delta_y + y + (delta_x + x >= width) - (delta_x + x < 0);
86  int motion_offset = dy * src->linesize[0] + dx * (1 + s->is_16bpp);
87 
88  if (motion_offset < 0) {
89  av_log(s->avctx, AV_LOG_ERROR, "motion offset < 0 (%d)\n", motion_offset);
90  return AVERROR_INVALIDDATA;
91  } else if (motion_offset > s->upper_motion_limit_offset) {
92  av_log(s->avctx, AV_LOG_ERROR, "motion offset above limit (%d >= %d)\n",
93  motion_offset, s->upper_motion_limit_offset);
94  return AVERROR_INVALIDDATA;
95  }
96  if (!src->data[0]) {
97  av_log(s->avctx, AV_LOG_ERROR, "Invalid decode type, corrupted header?\n");
98  return AVERROR(EINVAL);
99  }
100  s->hdsp.put_pixels_tab[!s->is_16bpp][0](s->pixel_ptr, src->data[0] + motion_offset,
101  dst->linesize[0], 8);
102  return 0;
103 }
104 
106 {
107  return copy_from(s, s->last_frame, frame, 0, 0);
108 }
109 
111 {
112  return copy_from(s, s->second_last_frame, frame, 0, 0);
113 }
114 
116 {
117  unsigned char B;
118  int x, y;
119 
120  /* copy block from 2 frames ago using a motion vector; need 1 more byte */
121  if (!s->is_16bpp) {
122  B = bytestream2_get_byte(&s->stream_ptr);
123  } else {
124  B = bytestream2_get_byte(&s->mv_ptr);
125  }
126 
127  if (B < 56) {
128  x = 8 + (B % 7);
129  y = B / 7;
130  } else {
131  x = -14 + ((B - 56) % 29);
132  y = 8 + ((B - 56) / 29);
133  }
134 
135  ff_tlog(s->avctx, "motion byte = %d, (x, y) = (%d, %d)\n", B, x, y);
136  return copy_from(s, s->second_last_frame, frame, x, y);
137 }
138 
140 {
141  unsigned char B;
142  int x, y;
143 
144  /* copy 8x8 block from current frame from an up/left block */
145 
146  /* need 1 more byte for motion */
147  if (!s->is_16bpp) {
148  B = bytestream2_get_byte(&s->stream_ptr);
149  } else {
150  B = bytestream2_get_byte(&s->mv_ptr);
151  }
152 
153  if (B < 56) {
154  x = -(8 + (B % 7));
155  y = -(B / 7);
156  } else {
157  x = -(-14 + ((B - 56) % 29));
158  y = -( 8 + ((B - 56) / 29));
159  }
160 
161  ff_tlog(s->avctx, "motion byte = %d, (x, y) = (%d, %d)\n", B, x, y);
162  return copy_from(s, frame, frame, x, y);
163 }
164 
166 {
167  int x, y;
168  unsigned char B, BL, BH;
169 
170  /* copy a block from the previous frame; need 1 more byte */
171  if (!s->is_16bpp) {
172  B = bytestream2_get_byte(&s->stream_ptr);
173  } else {
174  B = bytestream2_get_byte(&s->mv_ptr);
175  }
176 
177  BL = B & 0x0F;
178  BH = (B >> 4) & 0x0F;
179  x = -8 + BL;
180  y = -8 + BH;
181 
182  ff_tlog(s->avctx, "motion byte = %d, (x, y) = (%d, %d)\n", B, x, y);
183  return copy_from(s, s->last_frame, frame, x, y);
184 }
185 
187 {
188  signed char x, y;
189 
190  /* copy a block from the previous frame using an expanded range;
191  * need 2 more bytes */
192  x = bytestream2_get_byte(&s->stream_ptr);
193  y = bytestream2_get_byte(&s->stream_ptr);
194 
195  ff_tlog(s->avctx, "motion bytes = %d, %d\n", x, y);
196  return copy_from(s, s->last_frame, frame, x, y);
197 }
198 
200 {
201  /* mystery opcode? skip multiple blocks? */
202  av_log(s->avctx, AV_LOG_ERROR, "Help! Mystery opcode 0x6 seen\n");
203 
204  /* report success */
205  return 0;
206 }
207 
209 {
210  int x, y;
211  unsigned char P[2];
212  unsigned int flags;
213 
214  if (bytestream2_get_bytes_left(&s->stream_ptr) < 4) {
215  av_log(s->avctx, AV_LOG_ERROR, "too little data for opcode 0x7\n");
216  return AVERROR_INVALIDDATA;
217  }
218 
219  /* 2-color encoding */
220  P[0] = bytestream2_get_byte(&s->stream_ptr);
221  P[1] = bytestream2_get_byte(&s->stream_ptr);
222 
223  if (P[0] <= P[1]) {
224 
225  /* need 8 more bytes from the stream */
226  for (y = 0; y < 8; y++) {
227  flags = bytestream2_get_byte(&s->stream_ptr) | 0x100;
228  for (; flags != 1; flags >>= 1)
229  *s->pixel_ptr++ = P[flags & 1];
230  s->pixel_ptr += s->line_inc;
231  }
232 
233  } else {
234 
235  /* need 2 more bytes from the stream */
236  flags = bytestream2_get_le16(&s->stream_ptr);
237  for (y = 0; y < 8; y += 2) {
238  for (x = 0; x < 8; x += 2, flags >>= 1) {
239  s->pixel_ptr[x ] =
240  s->pixel_ptr[x + 1 ] =
241  s->pixel_ptr[x + s->stride] =
242  s->pixel_ptr[x + 1 + s->stride] = P[flags & 1];
243  }
244  s->pixel_ptr += s->stride * 2;
245  }
246  }
247 
248  /* report success */
249  return 0;
250 }
251 
253 {
254  int x, y;
255  unsigned char P[4];
256  unsigned int flags = 0;
257 
258  if (bytestream2_get_bytes_left(&s->stream_ptr) < 12) {
259  av_log(s->avctx, AV_LOG_ERROR, "too little data for opcode 0x8\n");
260  return AVERROR_INVALIDDATA;
261  }
262 
263  /* 2-color encoding for each 4x4 quadrant, or 2-color encoding on
264  * either top and bottom or left and right halves */
265  P[0] = bytestream2_get_byte(&s->stream_ptr);
266  P[1] = bytestream2_get_byte(&s->stream_ptr);
267 
268  if (P[0] <= P[1]) {
269  for (y = 0; y < 16; y++) {
270  // new values for each 4x4 block
271  if (!(y & 3)) {
272  if (y) {
273  P[0] = bytestream2_get_byte(&s->stream_ptr);
274  P[1] = bytestream2_get_byte(&s->stream_ptr);
275  }
276  flags = bytestream2_get_le16(&s->stream_ptr);
277  }
278 
279  for (x = 0; x < 4; x++, flags >>= 1)
280  *s->pixel_ptr++ = P[flags & 1];
281  s->pixel_ptr += s->stride - 4;
282  // switch to right half
283  if (y == 7) s->pixel_ptr -= 8 * s->stride - 4;
284  }
285 
286  } else {
287  flags = bytestream2_get_le32(&s->stream_ptr);
288  P[2] = bytestream2_get_byte(&s->stream_ptr);
289  P[3] = bytestream2_get_byte(&s->stream_ptr);
290 
291  if (P[2] <= P[3]) {
292 
293  /* vertical split; left & right halves are 2-color encoded */
294 
295  for (y = 0; y < 16; y++) {
296  for (x = 0; x < 4; x++, flags >>= 1)
297  *s->pixel_ptr++ = P[flags & 1];
298  s->pixel_ptr += s->stride - 4;
299  // switch to right half
300  if (y == 7) {
301  s->pixel_ptr -= 8 * s->stride - 4;
302  P[0] = P[2];
303  P[1] = P[3];
304  flags = bytestream2_get_le32(&s->stream_ptr);
305  }
306  }
307 
308  } else {
309 
310  /* horizontal split; top & bottom halves are 2-color encoded */
311 
312  for (y = 0; y < 8; y++) {
313  if (y == 4) {
314  P[0] = P[2];
315  P[1] = P[3];
316  flags = bytestream2_get_le32(&s->stream_ptr);
317  }
318 
319  for (x = 0; x < 8; x++, flags >>= 1)
320  *s->pixel_ptr++ = P[flags & 1];
321  s->pixel_ptr += s->line_inc;
322  }
323  }
324  }
325 
326  /* report success */
327  return 0;
328 }
329 
331 {
332  int x, y;
333  unsigned char P[4];
334 
335  if (bytestream2_get_bytes_left(&s->stream_ptr) < 8) {
336  av_log(s->avctx, AV_LOG_ERROR, "too little data for opcode 0x9\n");
337  return AVERROR_INVALIDDATA;
338  }
339 
340  /* 4-color encoding */
341  bytestream2_get_buffer(&s->stream_ptr, P, 4);
342 
343  if (P[0] <= P[1]) {
344  if (P[2] <= P[3]) {
345 
346  /* 1 of 4 colors for each pixel, need 16 more bytes */
347  for (y = 0; y < 8; y++) {
348  /* get the next set of 8 2-bit flags */
349  int flags = bytestream2_get_le16(&s->stream_ptr);
350  for (x = 0; x < 8; x++, flags >>= 2)
351  *s->pixel_ptr++ = P[flags & 0x03];
352  s->pixel_ptr += s->line_inc;
353  }
354 
355  } else {
356  uint32_t flags;
357 
358  /* 1 of 4 colors for each 2x2 block, need 4 more bytes */
359  flags = bytestream2_get_le32(&s->stream_ptr);
360 
361  for (y = 0; y < 8; y += 2) {
362  for (x = 0; x < 8; x += 2, flags >>= 2) {
363  s->pixel_ptr[x ] =
364  s->pixel_ptr[x + 1 ] =
365  s->pixel_ptr[x + s->stride] =
366  s->pixel_ptr[x + 1 + s->stride] = P[flags & 0x03];
367  }
368  s->pixel_ptr += s->stride * 2;
369  }
370 
371  }
372  } else {
373  uint64_t flags;
374 
375  /* 1 of 4 colors for each 2x1 or 1x2 block, need 8 more bytes */
376  flags = bytestream2_get_le64(&s->stream_ptr);
377  if (P[2] <= P[3]) {
378  for (y = 0; y < 8; y++) {
379  for (x = 0; x < 8; x += 2, flags >>= 2) {
380  s->pixel_ptr[x ] =
381  s->pixel_ptr[x + 1] = P[flags & 0x03];
382  }
383  s->pixel_ptr += s->stride;
384  }
385  } else {
386  for (y = 0; y < 8; y += 2) {
387  for (x = 0; x < 8; x++, flags >>= 2) {
388  s->pixel_ptr[x ] =
389  s->pixel_ptr[x + s->stride] = P[flags & 0x03];
390  }
391  s->pixel_ptr += s->stride * 2;
392  }
393  }
394  }
395 
396  /* report success */
397  return 0;
398 }
399 
401 {
402  int x, y;
403  unsigned char P[8];
404  int flags = 0;
405 
406  if (bytestream2_get_bytes_left(&s->stream_ptr) < 16) {
407  av_log(s->avctx, AV_LOG_ERROR, "too little data for opcode 0xA\n");
408  return AVERROR_INVALIDDATA;
409  }
410 
411  bytestream2_get_buffer(&s->stream_ptr, P, 4);
412 
413  /* 4-color encoding for each 4x4 quadrant, or 4-color encoding on
414  * either top and bottom or left and right halves */
415  if (P[0] <= P[1]) {
416 
417  /* 4-color encoding for each quadrant; need 32 bytes */
418  for (y = 0; y < 16; y++) {
419  // new values for each 4x4 block
420  if (!(y & 3)) {
421  if (y) bytestream2_get_buffer(&s->stream_ptr, P, 4);
422  flags = bytestream2_get_le32(&s->stream_ptr);
423  }
424 
425  for (x = 0; x < 4; x++, flags >>= 2)
426  *s->pixel_ptr++ = P[flags & 0x03];
427 
428  s->pixel_ptr += s->stride - 4;
429  // switch to right half
430  if (y == 7) s->pixel_ptr -= 8 * s->stride - 4;
431  }
432 
433  } else {
434  // vertical split?
435  int vert;
436  uint64_t flags = bytestream2_get_le64(&s->stream_ptr);
437 
438  bytestream2_get_buffer(&s->stream_ptr, P + 4, 4);
439  vert = P[4] <= P[5];
440 
441  /* 4-color encoding for either left and right or top and bottom
442  * halves */
443 
444  for (y = 0; y < 16; y++) {
445  for (x = 0; x < 4; x++, flags >>= 2)
446  *s->pixel_ptr++ = P[flags & 0x03];
447 
448  if (vert) {
449  s->pixel_ptr += s->stride - 4;
450  // switch to right half
451  if (y == 7) s->pixel_ptr -= 8 * s->stride - 4;
452  } else if (y & 1) s->pixel_ptr += s->line_inc;
453 
454  // load values for second half
455  if (y == 7) {
456  memcpy(P, P + 4, 4);
457  flags = bytestream2_get_le64(&s->stream_ptr);
458  }
459  }
460  }
461 
462  /* report success */
463  return 0;
464 }
465 
467 {
468  int y;
469 
470  /* 64-color encoding (each pixel in block is a different color) */
471  for (y = 0; y < 8; y++) {
472  bytestream2_get_buffer(&s->stream_ptr, s->pixel_ptr, 8);
473  s->pixel_ptr += s->stride;
474  }
475 
476  /* report success */
477  return 0;
478 }
479 
481 {
482  int x, y;
483 
484  /* 16-color block encoding: each 2x2 block is a different color */
485  for (y = 0; y < 8; y += 2) {
486  for (x = 0; x < 8; x += 2) {
487  s->pixel_ptr[x ] =
488  s->pixel_ptr[x + 1 ] =
489  s->pixel_ptr[x + s->stride] =
490  s->pixel_ptr[x + 1 + s->stride] = bytestream2_get_byte(&s->stream_ptr);
491  }
492  s->pixel_ptr += s->stride * 2;
493  }
494 
495  /* report success */
496  return 0;
497 }
498 
500 {
501  int y;
502  unsigned char P[2];
503 
504  if (bytestream2_get_bytes_left(&s->stream_ptr) < 4) {
505  av_log(s->avctx, AV_LOG_ERROR, "too little data for opcode 0xD\n");
506  return AVERROR_INVALIDDATA;
507  }
508 
509  /* 4-color block encoding: each 4x4 block is a different color */
510  for (y = 0; y < 8; y++) {
511  if (!(y & 3)) {
512  P[0] = bytestream2_get_byte(&s->stream_ptr);
513  P[1] = bytestream2_get_byte(&s->stream_ptr);
514  }
515  memset(s->pixel_ptr, P[0], 4);
516  memset(s->pixel_ptr + 4, P[1], 4);
517  s->pixel_ptr += s->stride;
518  }
519 
520  /* report success */
521  return 0;
522 }
523 
525 {
526  int y;
527  unsigned char pix;
528 
529  /* 1-color encoding: the whole block is 1 solid color */
530  pix = bytestream2_get_byte(&s->stream_ptr);
531 
532  for (y = 0; y < 8; y++) {
533  memset(s->pixel_ptr, pix, 8);
534  s->pixel_ptr += s->stride;
535  }
536 
537  /* report success */
538  return 0;
539 }
540 
542 {
543  int x, y;
544  unsigned char sample[2];
545 
546  /* dithered encoding */
547  sample[0] = bytestream2_get_byte(&s->stream_ptr);
548  sample[1] = bytestream2_get_byte(&s->stream_ptr);
549 
550  for (y = 0; y < 8; y++) {
551  for (x = 0; x < 8; x += 2) {
552  *s->pixel_ptr++ = sample[ y & 1 ];
553  *s->pixel_ptr++ = sample[!(y & 1)];
554  }
555  s->pixel_ptr += s->line_inc;
556  }
557 
558  /* report success */
559  return 0;
560 }
561 
563 {
564  signed char x, y;
565 
566  /* copy a block from the second last frame using an expanded range */
567  x = bytestream2_get_byte(&s->stream_ptr);
568  y = bytestream2_get_byte(&s->stream_ptr);
569 
570  ff_tlog(s->avctx, "motion bytes = %d, %d\n", x, y);
571  return copy_from(s, s->second_last_frame, frame, x, y);
572 }
573 
575 {
576  int x, y;
577  uint16_t P[2];
578  unsigned int flags;
579  uint16_t *pixel_ptr = (uint16_t*)s->pixel_ptr;
580 
581  /* 2-color encoding */
582  P[0] = bytestream2_get_le16(&s->stream_ptr);
583  P[1] = bytestream2_get_le16(&s->stream_ptr);
584 
585  if (!(P[0] & 0x8000)) {
586 
587  for (y = 0; y < 8; y++) {
588  flags = bytestream2_get_byte(&s->stream_ptr) | 0x100;
589  for (; flags != 1; flags >>= 1)
590  *pixel_ptr++ = P[flags & 1];
591  pixel_ptr += s->line_inc;
592  }
593 
594  } else {
595 
596  flags = bytestream2_get_le16(&s->stream_ptr);
597  for (y = 0; y < 8; y += 2) {
598  for (x = 0; x < 8; x += 2, flags >>= 1) {
599  pixel_ptr[x ] =
600  pixel_ptr[x + 1 ] =
601  pixel_ptr[x + s->stride] =
602  pixel_ptr[x + 1 + s->stride] = P[flags & 1];
603  }
604  pixel_ptr += s->stride * 2;
605  }
606  }
607 
608  return 0;
609 }
610 
612 {
613  int x, y;
614  uint16_t P[4];
615  unsigned int flags = 0;
616  uint16_t *pixel_ptr = (uint16_t*)s->pixel_ptr;
617 
618  /* 2-color encoding for each 4x4 quadrant, or 2-color encoding on
619  * either top and bottom or left and right halves */
620  P[0] = bytestream2_get_le16(&s->stream_ptr);
621  P[1] = bytestream2_get_le16(&s->stream_ptr);
622 
623  if (!(P[0] & 0x8000)) {
624 
625  for (y = 0; y < 16; y++) {
626  // new values for each 4x4 block
627  if (!(y & 3)) {
628  if (y) {
629  P[0] = bytestream2_get_le16(&s->stream_ptr);
630  P[1] = bytestream2_get_le16(&s->stream_ptr);
631  }
632  flags = bytestream2_get_le16(&s->stream_ptr);
633  }
634 
635  for (x = 0; x < 4; x++, flags >>= 1)
636  *pixel_ptr++ = P[flags & 1];
637  pixel_ptr += s->stride - 4;
638  // switch to right half
639  if (y == 7) pixel_ptr -= 8 * s->stride - 4;
640  }
641 
642  } else {
643 
644  flags = bytestream2_get_le32(&s->stream_ptr);
645  P[2] = bytestream2_get_le16(&s->stream_ptr);
646  P[3] = bytestream2_get_le16(&s->stream_ptr);
647 
648  if (!(P[2] & 0x8000)) {
649 
650  /* vertical split; left & right halves are 2-color encoded */
651 
652  for (y = 0; y < 16; y++) {
653  for (x = 0; x < 4; x++, flags >>= 1)
654  *pixel_ptr++ = P[flags & 1];
655  pixel_ptr += s->stride - 4;
656  // switch to right half
657  if (y == 7) {
658  pixel_ptr -= 8 * s->stride - 4;
659  P[0] = P[2];
660  P[1] = P[3];
661  flags = bytestream2_get_le32(&s->stream_ptr);
662  }
663  }
664 
665  } else {
666 
667  /* horizontal split; top & bottom halves are 2-color encoded */
668 
669  for (y = 0; y < 8; y++) {
670  if (y == 4) {
671  P[0] = P[2];
672  P[1] = P[3];
673  flags = bytestream2_get_le32(&s->stream_ptr);
674  }
675 
676  for (x = 0; x < 8; x++, flags >>= 1)
677  *pixel_ptr++ = P[flags & 1];
678  pixel_ptr += s->line_inc;
679  }
680  }
681  }
682 
683  /* report success */
684  return 0;
685 }
686 
688 {
689  int x, y;
690  uint16_t P[4];
691  uint16_t *pixel_ptr = (uint16_t*)s->pixel_ptr;
692 
693  /* 4-color encoding */
694  for (x = 0; x < 4; x++)
695  P[x] = bytestream2_get_le16(&s->stream_ptr);
696 
697  if (!(P[0] & 0x8000)) {
698  if (!(P[2] & 0x8000)) {
699 
700  /* 1 of 4 colors for each pixel */
701  for (y = 0; y < 8; y++) {
702  /* get the next set of 8 2-bit flags */
703  int flags = bytestream2_get_le16(&s->stream_ptr);
704  for (x = 0; x < 8; x++, flags >>= 2)
705  *pixel_ptr++ = P[flags & 0x03];
706  pixel_ptr += s->line_inc;
707  }
708 
709  } else {
710  uint32_t flags;
711 
712  /* 1 of 4 colors for each 2x2 block */
713  flags = bytestream2_get_le32(&s->stream_ptr);
714 
715  for (y = 0; y < 8; y += 2) {
716  for (x = 0; x < 8; x += 2, flags >>= 2) {
717  pixel_ptr[x ] =
718  pixel_ptr[x + 1 ] =
719  pixel_ptr[x + s->stride] =
720  pixel_ptr[x + 1 + s->stride] = P[flags & 0x03];
721  }
722  pixel_ptr += s->stride * 2;
723  }
724 
725  }
726  } else {
727  uint64_t flags;
728 
729  /* 1 of 4 colors for each 2x1 or 1x2 block */
730  flags = bytestream2_get_le64(&s->stream_ptr);
731  if (!(P[2] & 0x8000)) {
732  for (y = 0; y < 8; y++) {
733  for (x = 0; x < 8; x += 2, flags >>= 2) {
734  pixel_ptr[x ] =
735  pixel_ptr[x + 1] = P[flags & 0x03];
736  }
737  pixel_ptr += s->stride;
738  }
739  } else {
740  for (y = 0; y < 8; y += 2) {
741  for (x = 0; x < 8; x++, flags >>= 2) {
742  pixel_ptr[x ] =
743  pixel_ptr[x + s->stride] = P[flags & 0x03];
744  }
745  pixel_ptr += s->stride * 2;
746  }
747  }
748  }
749 
750  /* report success */
751  return 0;
752 }
753 
755 {
756  int x, y;
757  uint16_t P[8];
758  int flags = 0;
759  uint16_t *pixel_ptr = (uint16_t*)s->pixel_ptr;
760 
761  for (x = 0; x < 4; x++)
762  P[x] = bytestream2_get_le16(&s->stream_ptr);
763 
764  /* 4-color encoding for each 4x4 quadrant, or 4-color encoding on
765  * either top and bottom or left and right halves */
766  if (!(P[0] & 0x8000)) {
767 
768  /* 4-color encoding for each quadrant */
769  for (y = 0; y < 16; y++) {
770  // new values for each 4x4 block
771  if (!(y & 3)) {
772  if (y)
773  for (x = 0; x < 4; x++)
774  P[x] = bytestream2_get_le16(&s->stream_ptr);
775  flags = bytestream2_get_le32(&s->stream_ptr);
776  }
777 
778  for (x = 0; x < 4; x++, flags >>= 2)
779  *pixel_ptr++ = P[flags & 0x03];
780 
781  pixel_ptr += s->stride - 4;
782  // switch to right half
783  if (y == 7) pixel_ptr -= 8 * s->stride - 4;
784  }
785 
786  } else {
787  // vertical split?
788  int vert;
789  uint64_t flags = bytestream2_get_le64(&s->stream_ptr);
790 
791  for (x = 4; x < 8; x++)
792  P[x] = bytestream2_get_le16(&s->stream_ptr);
793  vert = !(P[4] & 0x8000);
794 
795  /* 4-color encoding for either left and right or top and bottom
796  * halves */
797 
798  for (y = 0; y < 16; y++) {
799  for (x = 0; x < 4; x++, flags >>= 2)
800  *pixel_ptr++ = P[flags & 0x03];
801 
802  if (vert) {
803  pixel_ptr += s->stride - 4;
804  // switch to right half
805  if (y == 7) pixel_ptr -= 8 * s->stride - 4;
806  } else if (y & 1) pixel_ptr += s->line_inc;
807 
808  // load values for second half
809  if (y == 7) {
810  memcpy(P, P + 4, 8);
811  flags = bytestream2_get_le64(&s->stream_ptr);
812  }
813  }
814  }
815 
816  /* report success */
817  return 0;
818 }
819 
821 {
822  int x, y;
823  uint16_t *pixel_ptr = (uint16_t*)s->pixel_ptr;
824 
825  /* 64-color encoding (each pixel in block is a different color) */
826  for (y = 0; y < 8; y++) {
827  for (x = 0; x < 8; x++)
828  pixel_ptr[x] = bytestream2_get_le16(&s->stream_ptr);
829  pixel_ptr += s->stride;
830  }
831 
832  /* report success */
833  return 0;
834 }
835 
837 {
838  int x, y;
839  uint16_t *pixel_ptr = (uint16_t*)s->pixel_ptr;
840 
841  /* 16-color block encoding: each 2x2 block is a different color */
842  for (y = 0; y < 8; y += 2) {
843  for (x = 0; x < 8; x += 2) {
844  pixel_ptr[x ] =
845  pixel_ptr[x + 1 ] =
846  pixel_ptr[x + s->stride] =
847  pixel_ptr[x + 1 + s->stride] = bytestream2_get_le16(&s->stream_ptr);
848  }
849  pixel_ptr += s->stride * 2;
850  }
851 
852  /* report success */
853  return 0;
854 }
855 
857 {
858  int x, y;
859  uint16_t P[2];
860  uint16_t *pixel_ptr = (uint16_t*)s->pixel_ptr;
861 
862  /* 4-color block encoding: each 4x4 block is a different color */
863  for (y = 0; y < 8; y++) {
864  if (!(y & 3)) {
865  P[0] = bytestream2_get_le16(&s->stream_ptr);
866  P[1] = bytestream2_get_le16(&s->stream_ptr);
867  }
868  for (x = 0; x < 8; x++)
869  pixel_ptr[x] = P[x >> 2];
870  pixel_ptr += s->stride;
871  }
872 
873  /* report success */
874  return 0;
875 }
876 
878 {
879  int x, y;
880  uint16_t pix;
881  uint16_t *pixel_ptr = (uint16_t*)s->pixel_ptr;
882 
883  /* 1-color encoding: the whole block is 1 solid color */
884  pix = bytestream2_get_le16(&s->stream_ptr);
885 
886  for (y = 0; y < 8; y++) {
887  for (x = 0; x < 8; x++)
888  pixel_ptr[x] = pix;
889  pixel_ptr += s->stride;
890  }
891 
892  /* report success */
893  return 0;
894 }
895 
905 };
906 
916 };
917 
919 {
920  int line;
921 
922  if (!opcode) {
923  for (line = 0; line < 8; ++line) {
924  bytestream2_get_buffer(&s->stream_ptr, s->pixel_ptr, 8);
925  s->pixel_ptr += s->stride;
926  }
927  } else {
928  /* Don't try to copy second_last_frame data on the first frames */
929  if (s->avctx->frame_number > 2)
930  copy_from(s, s->second_last_frame, frame, 0, 0);
931  }
932 }
933 
935 {
936  int off_x, off_y;
937 
938  if (opcode < 0) {
939  off_x = ((uint16_t)opcode - 0xC000) % frame->width;
940  off_y = ((uint16_t)opcode - 0xC000) / frame->width;
941  copy_from(s, s->last_frame, frame, off_x, off_y);
942  } else if (opcode > 0) {
943  off_x = ((uint16_t)opcode - 0x4000) % frame->width;
944  off_y = ((uint16_t)opcode - 0x4000) / frame->width;
945  copy_from(s, frame, frame, off_x, off_y);
946  }
947 }
948 
949 static void (* const ipvideo_format_06_passes[])(IpvideoContext *s, AVFrame *frame, int16_t op) = {
951 };
952 
954 {
955  int pass, x, y;
956  int16_t opcode;
957  GetByteContext decoding_map_ptr;
958 
959  /* this is PAL8, so make the palette available */
960  memcpy(frame->data[1], s->pal, AVPALETTE_SIZE);
961  s->stride = frame->linesize[0];
962 
963  s->line_inc = s->stride - 8;
964  s->upper_motion_limit_offset = (s->avctx->height - 8) * frame->linesize[0]
965  + (s->avctx->width - 8) * (1 + s->is_16bpp);
966 
967  bytestream2_init(&decoding_map_ptr, s->decoding_map, s->decoding_map_size);
968 
969  for (pass = 0; pass < 2; ++pass) {
970  bytestream2_seek(&decoding_map_ptr, 0, SEEK_SET);
971  for (y = 0; y < s->avctx->height; y += 8) {
972  for (x = 0; x < s->avctx->width; x += 8) {
973  opcode = bytestream2_get_le16(&decoding_map_ptr);
974 
975  ff_tlog(s->avctx,
976  " block @ (%3d, %3d): opcode 0x%X, data ptr offset %d\n",
977  x, y, opcode, bytestream2_tell(&s->stream_ptr));
978 
979  s->pixel_ptr = frame->data[0] + x + y * frame->linesize[0];
981  }
982  }
983  }
984 
985  if (bytestream2_get_bytes_left(&s->stream_ptr) > 1) {
986  av_log(s->avctx, AV_LOG_DEBUG,
987  "decode finished with %d bytes left over\n",
988  bytestream2_get_bytes_left(&s->stream_ptr));
989  }
990 }
991 
993 {
994  int line;
995 
996  if (!opcode) {
997  for (line = 0; line < 8; ++line) {
998  bytestream2_get_buffer(&s->stream_ptr, s->pixel_ptr, 8);
999  s->pixel_ptr += s->stride;
1000  }
1001  }
1002 }
1003 
1005 {
1006  int off_x, off_y;
1007 
1008  if (opcode < 0) {
1009  off_x = ((uint16_t)opcode - 0xC000) % s->cur_decode_frame->width;
1010  off_y = ((uint16_t)opcode - 0xC000) / s->cur_decode_frame->width;
1011  copy_from(s, s->prev_decode_frame, s->cur_decode_frame, off_x, off_y);
1012  } else if (opcode > 0) {
1013  off_x = ((uint16_t)opcode - 0x4000) % s->cur_decode_frame->width;
1014  off_y = ((uint16_t)opcode - 0x4000) / s->cur_decode_frame->width;
1015  copy_from(s, s->cur_decode_frame, s->cur_decode_frame, off_x, off_y);
1016  }
1017 }
1018 
1019 static void (* const ipvideo_format_10_passes[])(IpvideoContext *s, AVFrame *frame, int16_t op) = {
1021 };
1022 
1024 {
1025  int pass, x, y, changed_block;
1026  int16_t opcode, skip;
1027  GetByteContext decoding_map_ptr;
1028  GetByteContext skip_map_ptr;
1029 
1030  bytestream2_skip(&s->stream_ptr, 14); /* data starts 14 bytes in */
1031 
1032  /* this is PAL8, so make the palette available */
1033  memcpy(frame->data[1], s->pal, AVPALETTE_SIZE);
1034  s->stride = frame->linesize[0];
1035 
1036  s->line_inc = s->stride - 8;
1037  s->upper_motion_limit_offset = (s->avctx->height - 8) * frame->linesize[0]
1038  + (s->avctx->width - 8) * (1 + s->is_16bpp);
1039 
1040  bytestream2_init(&decoding_map_ptr, s->decoding_map, s->decoding_map_size);
1041  bytestream2_init(&skip_map_ptr, s->skip_map, s->skip_map_size);
1042 
1043  for (pass = 0; pass < 2; ++pass) {
1044  bytestream2_seek(&decoding_map_ptr, 0, SEEK_SET);
1045  bytestream2_seek(&skip_map_ptr, 0, SEEK_SET);
1046  skip = bytestream2_get_le16(&skip_map_ptr);
1047 
1048  for (y = 0; y < s->avctx->height; y += 8) {
1049  for (x = 0; x < s->avctx->width; x += 8) {
1050  s->pixel_ptr = s->cur_decode_frame->data[0] + x + y * s->cur_decode_frame->linesize[0];
1051 
1052  while (skip <= 0) {
1053  if (skip != -0x8000 && skip) {
1054  opcode = bytestream2_get_le16(&decoding_map_ptr);
1055  ipvideo_format_10_passes[pass](s, frame, opcode);
1056  break;
1057  }
1058  if (bytestream2_get_bytes_left(&skip_map_ptr) < 2)
1059  return;
1060  skip = bytestream2_get_le16(&skip_map_ptr);
1061  }
1062  skip *= 2;
1063  }
1064  }
1065  }
1066 
1067  bytestream2_seek(&skip_map_ptr, 0, SEEK_SET);
1068  skip = bytestream2_get_le16(&skip_map_ptr);
1069  for (y = 0; y < s->avctx->height; y += 8) {
1070  for (x = 0; x < s->avctx->width; x += 8) {
1071  changed_block = 0;
1072  s->pixel_ptr = frame->data[0] + x + y*frame->linesize[0];
1073 
1074  while (skip <= 0) {
1075  if (skip != -0x8000 && skip) {
1076  changed_block = 1;
1077  break;
1078  }
1079  if (bytestream2_get_bytes_left(&skip_map_ptr) < 2)
1080  return;
1081  skip = bytestream2_get_le16(&skip_map_ptr);
1082  }
1083 
1084  if (changed_block) {
1085  copy_from(s, s->cur_decode_frame, frame, 0, 0);
1086  } else {
1087  /* Don't try to copy last_frame data on the first frame */
1088  if (s->avctx->frame_number)
1089  copy_from(s, s->last_frame, frame, 0, 0);
1090  }
1091  skip *= 2;
1092  }
1093  }
1094 
1095  FFSWAP(AVFrame*, s->prev_decode_frame, s->cur_decode_frame);
1096 
1097  if (bytestream2_get_bytes_left(&s->stream_ptr) > 1) {
1098  av_log(s->avctx, AV_LOG_DEBUG,
1099  "decode finished with %d bytes left over\n",
1100  bytestream2_get_bytes_left(&s->stream_ptr));
1101  }
1102 }
1103 
1105 {
1106  int x, y;
1107  unsigned char opcode;
1108  int ret;
1109  GetBitContext gb;
1110 
1111  bytestream2_skip(&s->stream_ptr, 14); /* data starts 14 bytes in */
1112  if (!s->is_16bpp) {
1113  /* this is PAL8, so make the palette available */
1114  memcpy(frame->data[1], s->pal, AVPALETTE_SIZE);
1115 
1116  s->stride = frame->linesize[0];
1117  } else {
1118  s->stride = frame->linesize[0] >> 1;
1119  s->mv_ptr = s->stream_ptr;
1120  bytestream2_skip(&s->mv_ptr, bytestream2_get_le16(&s->stream_ptr));
1121  }
1122  s->line_inc = s->stride - 8;
1123  s->upper_motion_limit_offset = (s->avctx->height - 8) * frame->linesize[0]
1124  + (s->avctx->width - 8) * (1 + s->is_16bpp);
1125 
1126  init_get_bits(&gb, s->decoding_map, s->decoding_map_size * 8);
1127  for (y = 0; y < s->avctx->height; y += 8) {
1128  for (x = 0; x < s->avctx->width; x += 8) {
1129  if (get_bits_left(&gb) < 4)
1130  return;
1131  opcode = get_bits(&gb, 4);
1132 
1133  ff_tlog(s->avctx,
1134  " block @ (%3d, %3d): encoding 0x%X, data ptr offset %d\n",
1135  x, y, opcode, bytestream2_tell(&s->stream_ptr));
1136 
1137  if (!s->is_16bpp) {
1138  s->pixel_ptr = frame->data[0] + x
1139  + y*frame->linesize[0];
1140  ret = ipvideo_decode_block[opcode](s, frame);
1141  } else {
1142  s->pixel_ptr = frame->data[0] + x*2
1143  + y*frame->linesize[0];
1144  ret = ipvideo_decode_block16[opcode](s, frame);
1145  }
1146  if (ret != 0) {
1147  av_log(s->avctx, AV_LOG_ERROR, "decode problem on frame %d, @ block (%d, %d)\n",
1148  s->avctx->frame_number, x, y);
1149  return;
1150  }
1151  }
1152  }
1153  if (bytestream2_get_bytes_left(&s->stream_ptr) > 1) {
1154  av_log(s->avctx, AV_LOG_DEBUG,
1155  "decode finished with %d bytes left over\n",
1156  bytestream2_get_bytes_left(&s->stream_ptr));
1157  }
1158 }
1159 
1161 {
1162  IpvideoContext *s = avctx->priv_data;
1163 
1164  s->avctx = avctx;
1165 
1166  s->is_16bpp = avctx->bits_per_coded_sample == 16;
1167  avctx->pix_fmt = s->is_16bpp ? AV_PIX_FMT_RGB555 : AV_PIX_FMT_PAL8;
1168 
1169  ff_hpeldsp_init(&s->hdsp, avctx->flags);
1170 
1171  s->last_frame = av_frame_alloc();
1172  s->second_last_frame = av_frame_alloc();
1173  s->cur_decode_frame = av_frame_alloc();
1174  s->prev_decode_frame = av_frame_alloc();
1175  if (!s->last_frame || !s->second_last_frame ||
1176  !s->cur_decode_frame || !s->prev_decode_frame) {
1177  return AVERROR(ENOMEM);
1178  }
1179 
1180  s->cur_decode_frame->width = avctx->width;
1181  s->prev_decode_frame->width = avctx->width;
1182  s->cur_decode_frame->height = avctx->height;
1183  s->prev_decode_frame->height = avctx->height;
1184  s->cur_decode_frame->format = avctx->pix_fmt;
1185  s->prev_decode_frame->format = avctx->pix_fmt;
1186 
1187  return 0;
1188 }
1189 
1191  void *data, int *got_frame,
1192  AVPacket *avpkt)
1193 {
1194  const uint8_t *buf = avpkt->data;
1195  int buf_size = avpkt->size;
1196  IpvideoContext *s = avctx->priv_data;
1197  AVFrame *frame = data;
1198  int ret;
1199  int send_buffer;
1200  int frame_format;
1201  int video_data_size;
1202 
1204  av_frame_unref(s->last_frame);
1205  av_frame_unref(s->second_last_frame);
1206  av_frame_unref(s->cur_decode_frame);
1207  av_frame_unref(s->prev_decode_frame);
1208  }
1209 
1210  if (!s->cur_decode_frame->data[0]) {
1211  ret = ff_get_buffer(avctx, s->cur_decode_frame, 0);
1212  if (ret < 0)
1213  return ret;
1214 
1215  ret = ff_get_buffer(avctx, s->prev_decode_frame, 0);
1216  if (ret < 0) {
1217  av_frame_unref(s->cur_decode_frame);
1218  return ret;
1219  }
1220  }
1221 
1222  if (buf_size < 8)
1223  return AVERROR_INVALIDDATA;
1224 
1225  frame_format = AV_RL8(buf);
1226  send_buffer = AV_RL8(buf + 1);
1227  video_data_size = AV_RL16(buf + 2);
1228  s->decoding_map_size = AV_RL16(buf + 4);
1229  s->skip_map_size = AV_RL16(buf + 6);
1230 
1231  switch (frame_format) {
1232  case 0x06:
1233  if (s->decoding_map_size) {
1234  av_log(avctx, AV_LOG_ERROR, "Decoding map for format 0x06\n");
1235  return AVERROR_INVALIDDATA;
1236  }
1237 
1238  if (s->skip_map_size) {
1239  av_log(avctx, AV_LOG_ERROR, "Skip map for format 0x06\n");
1240  return AVERROR_INVALIDDATA;
1241  }
1242 
1243  if (s->is_16bpp) {
1244  av_log(avctx, AV_LOG_ERROR, "Video format 0x06 does not support 16bpp movies\n");
1245  return AVERROR_INVALIDDATA;
1246  }
1247 
1248  /* Decoding map for 0x06 frame format is at the top of pixeldata */
1249  s->decoding_map_size = ((s->avctx->width / 8) * (s->avctx->height / 8)) * 2;
1250  s->decoding_map = buf + 8 + 14; /* 14 bits of op data */
1251  video_data_size -= s->decoding_map_size + 14;
1252  if (video_data_size <= 0 || s->decoding_map_size == 0)
1253  return AVERROR_INVALIDDATA;
1254 
1255  if (buf_size < 8 + s->decoding_map_size + 14 + video_data_size)
1256  return AVERROR_INVALIDDATA;
1257 
1258  bytestream2_init(&s->stream_ptr, buf + 8 + s->decoding_map_size + 14, video_data_size);
1259 
1260  break;
1261 
1262  case 0x10:
1263  if (! s->decoding_map_size) {
1264  av_log(avctx, AV_LOG_ERROR, "Empty decoding map for format 0x10\n");
1265  return AVERROR_INVALIDDATA;
1266  }
1267 
1268  if (! s->skip_map_size) {
1269  av_log(avctx, AV_LOG_ERROR, "Empty skip map for format 0x10\n");
1270  return AVERROR_INVALIDDATA;
1271  }
1272 
1273  if (s->is_16bpp) {
1274  av_log(avctx, AV_LOG_ERROR, "Video format 0x10 does not support 16bpp movies\n");
1275  return AVERROR_INVALIDDATA;
1276  }
1277 
1278  if (buf_size < 8 + video_data_size + s->decoding_map_size + s->skip_map_size)
1279  return AVERROR_INVALIDDATA;
1280 
1281  bytestream2_init(&s->stream_ptr, buf + 8, video_data_size);
1282  s->decoding_map = buf + 8 + video_data_size;
1283  s->skip_map = buf + 8 + video_data_size + s->decoding_map_size;
1284 
1285  break;
1286 
1287  case 0x11:
1288  if (! s->decoding_map_size) {
1289  av_log(avctx, AV_LOG_ERROR, "Empty decoding map for format 0x11\n");
1290  return AVERROR_INVALIDDATA;
1291  }
1292 
1293  if (s->skip_map_size) {
1294  av_log(avctx, AV_LOG_ERROR, "Skip map for format 0x11\n");
1295  return AVERROR_INVALIDDATA;
1296  }
1297 
1298  if (buf_size < 8 + video_data_size + s->decoding_map_size)
1299  return AVERROR_INVALIDDATA;
1300 
1301  bytestream2_init(&s->stream_ptr, buf + 8, video_data_size);
1302  s->decoding_map = buf + 8 + video_data_size;
1303 
1304  break;
1305 
1306  default:
1307  av_log(avctx, AV_LOG_ERROR, "Frame type 0x%02X unsupported\n", frame_format);
1308  }
1309 
1310  /* ensure we can't overread the packet */
1311  if (buf_size < 8 + s->decoding_map_size + video_data_size + s->skip_map_size) {
1312  av_log(avctx, AV_LOG_ERROR, "Invalid IP packet size\n");
1313  return AVERROR_INVALIDDATA;
1314  }
1315 
1316  if ((ret = ff_get_buffer(avctx, frame, AV_GET_BUFFER_FLAG_REF)) < 0)
1317  return ret;
1318 
1319  if (!s->is_16bpp) {
1322  if (pal && size == AVPALETTE_SIZE) {
1324  memcpy(s->pal, pal, AVPALETTE_SIZE);
1325  } else if (pal) {
1326  av_log(avctx, AV_LOG_ERROR, "Palette size %d is wrong\n", size);
1327  }
1328  }
1329 
1330  switch (frame_format) {
1331  case 0x06:
1333  break;
1334  case 0x10:
1336  break;
1337  case 0x11:
1339  break;
1340  }
1341 
1342  *got_frame = send_buffer;
1343 
1344  /* shuffle frames */
1345  av_frame_unref(s->second_last_frame);
1346  FFSWAP(AVFrame*, s->second_last_frame, s->last_frame);
1347  if ((ret = av_frame_ref(s->last_frame, frame)) < 0)
1348  return ret;
1349 
1350  /* report that the buffer was completely consumed */
1351  return buf_size;
1352 }
1353 
1355 {
1356  IpvideoContext *s = avctx->priv_data;
1357 
1358  av_frame_free(&s->last_frame);
1359  av_frame_free(&s->second_last_frame);
1360  av_frame_free(&s->cur_decode_frame);
1361  av_frame_free(&s->prev_decode_frame);
1362 
1363  return 0;
1364 }
1365 
1367  .name = "interplayvideo",
1368  .long_name = NULL_IF_CONFIG_SMALL("Interplay MVE video"),
1369  .type = AVMEDIA_TYPE_VIDEO,
1371  .priv_data_size = sizeof(IpvideoContext),
1373  .close = ipvideo_decode_end,
1375  .capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_PARAM_CHANGE,
1376  .caps_internal = FF_CODEC_CAP_INIT_CLEANUP,
1377 };
#define av_cold
Definition: attributes.h:88
uint8_t
Libavcodec external API header.
uint8_t * av_packet_get_side_data(const AVPacket *pkt, enum AVPacketSideDataType type, buffer_size_t *size)
Definition: avpacket.c:368
#define AV_RL16
Definition: intreadwrite.h:42
static av_cold int init(AVCodecContext *avctx)
Definition: avrndec.c:31
static av_always_inline unsigned int bytestream2_get_buffer(GetByteContext *g, uint8_t *dst, unsigned int size)
Definition: bytestream.h:267
static av_always_inline int bytestream2_get_bytes_left(GetByteContext *g)
Definition: bytestream.h:158
static av_always_inline void bytestream2_init(GetByteContext *g, const uint8_t *buf, int buf_size)
Definition: bytestream.h:137
static av_always_inline void bytestream2_skip(GetByteContext *g, unsigned int size)
Definition: bytestream.h:168
static av_always_inline int bytestream2_seek(GetByteContext *g, int offset, int whence)
Definition: bytestream.h:212
static av_always_inline int bytestream2_tell(GetByteContext *g)
Definition: bytestream.h:192
#define flags(name, subs,...)
Definition: cbs_av1.c:572
#define s(width, name)
Definition: cbs_vp9.c:257
#define FFSWAP(type, a, b)
Definition: common.h:108
#define NULL
Definition: coverity.c:32
int ff_get_buffer(AVCodecContext *avctx, AVFrame *frame, int flags)
Get a buffer for a frame.
Definition: decode.c:1900
static void decode(AVCodecContext *dec_ctx, AVPacket *pkt, AVFrame *frame, FILE *outfile)
Definition: decode_audio.c:71
static AVFrame * frame
int
#define sample
bitstream reader API header.
static int get_bits_left(GetBitContext *gb)
Definition: get_bits.h:849
static unsigned int get_bits(GetBitContext *s, int n)
Read 1-25 bits.
Definition: get_bits.h:379
static int init_get_bits(GetBitContext *s, const uint8_t *buffer, int bit_size)
Initialize GetBitContext.
Definition: get_bits.h:659
#define AV_CODEC_CAP_DR1
Codec uses get_buffer() or get_encode_buffer() for allocating buffers and supports custom allocators.
Definition: codec.h:52
#define AV_GET_BUFFER_FLAG_REF
The decoder will keep a reference to the frame and may reuse it later.
Definition: avcodec.h:514
#define AV_CODEC_CAP_PARAM_CHANGE
Codec supports changed parameters at any point.
Definition: codec.h:116
@ AV_CODEC_ID_INTERPLAY_VIDEO
Definition: codec_id.h:88
@ AV_PKT_DATA_PALETTE
An AV_PKT_DATA_PALETTE side data packet contains exactly AVPALETTE_SIZE bytes worth of palette.
Definition: packet.h:46
@ AV_PKT_DATA_PARAM_CHANGE
An AV_PKT_DATA_PARAM_CHANGE side data packet is laid out as follows:
Definition: packet.h:72
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:59
#define AVERROR(e)
Definition: error.h:43
void av_frame_unref(AVFrame *frame)
Unreference all the buffers referenced by frame and reset the frame fields.
Definition: frame.c:553
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:443
void av_frame_free(AVFrame **frame)
Free the frame and any dynamically allocated objects in it, e.g.
Definition: frame.c:203
AVFrame * av_frame_alloc(void)
Allocate an AVFrame and set its fields to default values.
Definition: frame.c:190
#define AV_LOG_DEBUG
Stuff which is only useful for libav* developers.
Definition: log.h:215
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:194
@ AVMEDIA_TYPE_VIDEO
Definition: avutil.h:201
for(j=16;j >0;--j)
av_cold void ff_hpeldsp_init(HpelDSPContext *c, int flags)
Definition: hpeldsp.c:338
#define B
Definition: huffyuvdsp.h:32
AVCodec ff_interplay_video_decoder
static void ipvideo_decode_format_06_opcodes(IpvideoContext *s, AVFrame *frame)
static void(*const ipvideo_format_10_passes[])(IpvideoContext *s, AVFrame *frame, int16_t op)
static av_cold int ipvideo_decode_end(AVCodecContext *avctx)
static void ipvideo_format_06_firstpass(IpvideoContext *s, AVFrame *frame, int16_t opcode)
static void ipvideo_decode_format_10_opcodes(IpvideoContext *s, AVFrame *frame)
static int copy_from(IpvideoContext *s, AVFrame *src, AVFrame *dst, int delta_x, int delta_y)
static int ipvideo_decode_block_opcode_0x9(IpvideoContext *s, AVFrame *frame)
static int ipvideo_decode_block_opcode_0xC(IpvideoContext *s, AVFrame *frame)
static int ipvideo_decode_block_opcode_0x7_16(IpvideoContext *s, AVFrame *frame)
static void ipvideo_decode_format_11_opcodes(IpvideoContext *s, AVFrame *frame)
static int ipvideo_decode_block_opcode_0x2(IpvideoContext *s, AVFrame *frame)
static int ipvideo_decode_block_opcode_0x9_16(IpvideoContext *s, AVFrame *frame)
static int ipvideo_decode_block_opcode_0x7(IpvideoContext *s, AVFrame *frame)
static int ipvideo_decode_block_opcode_0x8_16(IpvideoContext *s, AVFrame *frame)
static int ipvideo_decode_block_opcode_0xD_16(IpvideoContext *s, AVFrame *frame)
static int ipvideo_decode_block_opcode_0xF(IpvideoContext *s, AVFrame *frame)
static int ipvideo_decode_block_opcode_0x1(IpvideoContext *s, AVFrame *frame)
static int ipvideo_decode_block_opcode_0xA(IpvideoContext *s, AVFrame *frame)
static void ipvideo_format_06_secondpass(IpvideoContext *s, AVFrame *frame, int16_t opcode)
static void(*const ipvideo_format_06_passes[])(IpvideoContext *s, AVFrame *frame, int16_t op)
static int ipvideo_decode_block_opcode_0xB_16(IpvideoContext *s, AVFrame *frame)
static int ipvideo_decode_frame(AVCodecContext *avctx, void *data, int *got_frame, AVPacket *avpkt)
static int(*const ipvideo_decode_block[])(IpvideoContext *s, AVFrame *frame)
static int ipvideo_decode_block_opcode_0x0(IpvideoContext *s, AVFrame *frame)
static int ipvideo_decode_block_opcode_0xA_16(IpvideoContext *s, AVFrame *frame)
static int ipvideo_decode_block_opcode_0x4(IpvideoContext *s, AVFrame *frame)
static int ipvideo_decode_block_opcode_0x8(IpvideoContext *s, AVFrame *frame)
static int ipvideo_decode_block_opcode_0xB(IpvideoContext *s, AVFrame *frame)
static int ipvideo_decode_block_opcode_0xE(IpvideoContext *s, AVFrame *frame)
static int(*const ipvideo_decode_block16[])(IpvideoContext *s, AVFrame *frame)
static int ipvideo_decode_block_opcode_0x3(IpvideoContext *s, AVFrame *frame)
static int ipvideo_decode_block_opcode_0xE_16(IpvideoContext *s, AVFrame *frame)
static av_cold int ipvideo_decode_init(AVCodecContext *avctx)
static int ipvideo_decode_block_opcode_0xD(IpvideoContext *s, AVFrame *frame)
static int ipvideo_decode_block_opcode_0x5(IpvideoContext *s, AVFrame *frame)
static int ipvideo_decode_block_opcode_0xC_16(IpvideoContext *s, AVFrame *frame)
static int ipvideo_decode_block_opcode_0x6_16(IpvideoContext *s, AVFrame *frame)
static void ipvideo_format_10_secondpass(IpvideoContext *s, AVFrame *frame, int16_t opcode)
static int ipvideo_decode_block_opcode_0x6(IpvideoContext *s, AVFrame *frame)
static void ipvideo_format_10_firstpass(IpvideoContext *s, AVFrame *frame, int16_t opcode)
#define AV_RL8(x)
Definition: intreadwrite.h:398
static int op(uint8_t **dst, const uint8_t *dst_end, GetByteContext *gb, int pixel, int count, int *x, int width, int linesize)
Perform decode operation.
Definition: anm.c:75
#define ff_tlog(ctx,...)
Definition: internal.h:96
#define FF_CODEC_CAP_INIT_CLEANUP
The codec allows calling the close function for deallocation even if the init function returned a fai...
Definition: internal.h:49
common internal API header
int buffer_size_t
Definition: internal.h:306
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification.
Definition: internal.h:117
#define P
const char data[16]
Definition: mxf.c:142
@ AV_PIX_FMT_PAL8
8 bits with AV_PIX_FMT_RGB32 palette
Definition: pixfmt.h:77
#define AVPALETTE_SIZE
Definition: pixfmt.h:32
#define AV_PIX_FMT_RGB555
Definition: pixfmt.h:387
typedef void(RENAME(mix_any_func_type))
main external API structure.
Definition: avcodec.h:536
enum AVPixelFormat pix_fmt
Pixel format, see AV_PIX_FMT_xxx.
Definition: avcodec.h:746
int width
picture width / height.
Definition: avcodec.h:709
int bits_per_coded_sample
bits per sample/pixel from the demuxer (needed for huffyuv).
Definition: avcodec.h:1740
int flags
AV_CODEC_FLAG_*.
Definition: avcodec.h:616
void * priv_data
Definition: avcodec.h:563
AVCodec.
Definition: codec.h:197
const char * name
Name of the codec implementation.
Definition: codec.h:204
This structure describes decoded (raw) audio or video data.
Definition: frame.h:318
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
Definition: frame.h:332
int width
Definition: frame.h:376
int palette_has_changed
Tell user application that palette has changed from previous frame.
Definition: frame.h:475
int linesize[AV_NUM_DATA_POINTERS]
For video, size in bytes of each picture line.
Definition: frame.h:349
This structure stores compressed data.
Definition: packet.h:346
int size
Definition: packet.h:370
uint8_t * data
Definition: packet.h:369
Half-pel DSP context.
Definition: hpeldsp.h:45
const unsigned char * decoding_map
AVCodecContext * avctx
AVFrame * second_last_frame
const unsigned char * skip_map
HpelDSPContext hdsp
GetByteContext stream_ptr
GetByteContext mv_ptr
unsigned char * pixel_ptr
AVFrame * cur_decode_frame
int upper_motion_limit_offset
AVFrame * prev_decode_frame
AVFrame * last_frame
uint32_t pal[256]
Definition: graph2dot.c:48
#define av_log(a,...)
#define src
Definition: vp8dsp.c:255
#define width
int size
#define pass
Definition: tx_template.c:347
if(ret< 0)
Definition: vf_mcdeint.c:282
#define BL(type, name)
Definition: vf_shear.c:169