FFmpeg
 All Data Structures Namespaces Files Functions Variables Typedefs Enumerations Enumerator Macros Groups Pages
flicvideo.c
Go to the documentation of this file.
1 /*
2  * FLI/FLC Animation Video Decoder
3  * Copyright (C) 2003, 2004 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  * Autodesk Animator FLI/FLC Video Decoder
25  * by Mike Melanson (melanson@pcisys.net)
26  * for more information on the .fli/.flc file format and all of its many
27  * variations, visit:
28  * http://www.compuphase.com/flic.htm
29  *
30  * This decoder outputs PAL8/RGB555/RGB565/BGR24. To use this decoder, be
31  * sure that your demuxer sends the FLI file header to the decoder via
32  * the extradata chunk in AVCodecContext. The chunk should be 128 bytes
33  * large. The only exception is for FLI files from the game "Magic Carpet",
34  * in which the header is only 12 bytes.
35  */
36 
37 #include <stdio.h>
38 #include <stdlib.h>
39 #include <string.h>
40 
41 #include "libavutil/intreadwrite.h"
42 #include "avcodec.h"
43 #include "bytestream.h"
44 #include "internal.h"
45 #include "mathops.h"
46 
47 #define FLI_256_COLOR 4
48 #define FLI_DELTA 7
49 #define FLI_COLOR 11
50 #define FLI_LC 12
51 #define FLI_BLACK 13
52 #define FLI_BRUN 15
53 #define FLI_COPY 16
54 #define FLI_MINI 18
55 #define FLI_DTA_BRUN 25
56 #define FLI_DTA_COPY 26
57 #define FLI_DTA_LC 27
58 
59 #define FLI_TYPE_CODE (0xAF11)
60 #define FLC_FLX_TYPE_CODE (0xAF12)
61 #define FLC_DTA_TYPE_CODE (0xAF44) /* Marks an "Extended FLC" comes from Dave's Targa Animator (DTA) */
62 #define FLC_MAGIC_CARPET_SYNTHETIC_TYPE_CODE (0xAF13)
63 
64 #define CHECK_PIXEL_PTR(n) \
65  if (pixel_ptr + n > pixel_limit) { \
66  av_log (s->avctx, AV_LOG_ERROR, "Invalid pixel_ptr = %d > pixel_limit = %d\n", \
67  pixel_ptr + n, pixel_limit); \
68  return AVERROR_INVALIDDATA; \
69  } \
70 
71 typedef struct FlicDecodeContext {
74 
75  unsigned int palette[256];
77  int fli_type; /* either 0xAF11 or 0xAF12, affects palette resolution */
79 
81 {
82  FlicDecodeContext *s = avctx->priv_data;
83  unsigned char *fli_header = (unsigned char *)avctx->extradata;
84  int depth;
85 
86  if (avctx->extradata_size != 0 &&
87  avctx->extradata_size != 12 &&
88  avctx->extradata_size != 128 &&
89  avctx->extradata_size != 256 &&
90  avctx->extradata_size != 904 &&
91  avctx->extradata_size != 1024) {
92  av_log(avctx, AV_LOG_ERROR, "Unexpected extradata size %d\n", avctx->extradata_size);
93  return AVERROR_INVALIDDATA;
94  }
95 
96  s->avctx = avctx;
97 
98  if (s->avctx->extradata_size == 12) {
99  /* special case for magic carpet FLIs */
101  depth = 8;
102  } else if (avctx->extradata_size == 1024) {
103  uint8_t *ptr = avctx->extradata;
104  int i;
105 
106  for (i = 0; i < 256; i++) {
107  s->palette[i] = AV_RL32(ptr);
108  ptr += 4;
109  }
110  depth = 8;
111  /* FLI in MOV, see e.g. FFmpeg trac issue #626 */
112  } else if (avctx->extradata_size == 0 ||
113  avctx->extradata_size == 256 ||
114  /* see FFmpeg ticket #1234 */
115  avctx->extradata_size == 904) {
116  s->fli_type = FLI_TYPE_CODE;
117  depth = 8;
118  } else {
119  s->fli_type = AV_RL16(&fli_header[4]);
120  depth = AV_RL16(&fli_header[12]);
121  }
122 
123  if (depth == 0) {
124  depth = 8; /* Some FLC generators set depth to zero, when they mean 8Bpp. Fix up here */
125  }
126 
127  if ((s->fli_type == FLC_FLX_TYPE_CODE) && (depth == 16)) {
128  depth = 15; /* Original Autodesk FLX's say the depth is 16Bpp when it is really 15Bpp */
129  }
130 
131  switch (depth) {
132  case 8 : avctx->pix_fmt = AV_PIX_FMT_PAL8; break;
133  case 15 : avctx->pix_fmt = AV_PIX_FMT_RGB555; break;
134  case 16 : avctx->pix_fmt = AV_PIX_FMT_RGB565; break;
135  case 24 : avctx->pix_fmt = AV_PIX_FMT_BGR24; break;
136  default :
137  av_log(avctx, AV_LOG_ERROR, "Unknown FLC/FLX depth of %d Bpp is unsupported.\n",depth);
138  return AVERROR_INVALIDDATA;
139  }
140 
141  s->frame = av_frame_alloc();
142  if (!s->frame)
143  return AVERROR(ENOMEM);
144 
145  s->new_palette = 0;
146 
147  return 0;
148 }
149 
151  void *data, int *got_frame,
152  const uint8_t *buf, int buf_size)
153 {
154  FlicDecodeContext *s = avctx->priv_data;
155 
156  GetByteContext g2;
157  int pixel_ptr;
158  int palette_ptr;
159  unsigned char palette_idx1;
160  unsigned char palette_idx2;
161 
162  unsigned int frame_size;
163  int num_chunks;
164 
165  unsigned int chunk_size;
166  int chunk_type;
167 
168  int i, j, ret;
169 
170  int color_packets;
171  int color_changes;
172  int color_shift;
173  unsigned char r, g, b;
174 
175  int lines;
176  int compressed_lines;
177  int starting_line;
178  signed short line_packets;
179  int y_ptr;
180  int byte_run;
181  int pixel_skip;
182  int pixel_countdown;
183  unsigned char *pixels;
184  unsigned int pixel_limit;
185 
186  bytestream2_init(&g2, buf, buf_size);
187 
188  if ((ret = ff_reget_buffer(avctx, s->frame)) < 0)
189  return ret;
190 
191  pixels = s->frame->data[0];
192  pixel_limit = s->avctx->height * s->frame->linesize[0];
193  if (buf_size < 16 || buf_size > INT_MAX - (3 * 256 + AV_INPUT_BUFFER_PADDING_SIZE))
194  return AVERROR_INVALIDDATA;
195  frame_size = bytestream2_get_le32(&g2);
196  if (frame_size > buf_size)
197  frame_size = buf_size;
198  bytestream2_skip(&g2, 2); /* skip the magic number */
199  num_chunks = bytestream2_get_le16(&g2);
200  bytestream2_skip(&g2, 8); /* skip padding */
201 
202  frame_size -= 16;
203 
204  /* iterate through the chunks */
205  while ((frame_size >= 6) && (num_chunks > 0) &&
206  bytestream2_get_bytes_left(&g2) >= 4) {
207  int stream_ptr_after_chunk;
208  chunk_size = bytestream2_get_le32(&g2);
209  if (chunk_size > frame_size) {
210  av_log(avctx, AV_LOG_WARNING,
211  "Invalid chunk_size = %u > frame_size = %u\n", chunk_size, frame_size);
212  chunk_size = frame_size;
213  }
214  stream_ptr_after_chunk = bytestream2_tell(&g2) - 4 + chunk_size;
215 
216  chunk_type = bytestream2_get_le16(&g2);
217 
218  switch (chunk_type) {
219  case FLI_256_COLOR:
220  case FLI_COLOR:
221  /* check special case: If this file is from the Magic Carpet
222  * game and uses 6-bit colors even though it reports 256-color
223  * chunks in a 0xAF12-type file (fli_type is set to 0xAF13 during
224  * initialization) */
225  if ((chunk_type == FLI_256_COLOR) && (s->fli_type != FLC_MAGIC_CARPET_SYNTHETIC_TYPE_CODE))
226  color_shift = 0;
227  else
228  color_shift = 2;
229  /* set up the palette */
230  color_packets = bytestream2_get_le16(&g2);
231  palette_ptr = 0;
232  for (i = 0; i < color_packets; i++) {
233  /* first byte is how many colors to skip */
234  palette_ptr += bytestream2_get_byte(&g2);
235 
236  /* next byte indicates how many entries to change */
237  color_changes = bytestream2_get_byte(&g2);
238 
239  /* if there are 0 color changes, there are actually 256 */
240  if (color_changes == 0)
241  color_changes = 256;
242 
243  if (bytestream2_tell(&g2) + color_changes * 3 > stream_ptr_after_chunk)
244  break;
245 
246  for (j = 0; j < color_changes; j++) {
247  unsigned int entry;
248 
249  /* wrap around, for good measure */
250  if ((unsigned)palette_ptr >= 256)
251  palette_ptr = 0;
252 
253  r = bytestream2_get_byte(&g2) << color_shift;
254  g = bytestream2_get_byte(&g2) << color_shift;
255  b = bytestream2_get_byte(&g2) << color_shift;
256  entry = 0xFFU << 24 | r << 16 | g << 8 | b;
257  if (color_shift == 2)
258  entry |= entry >> 6 & 0x30303;
259  if (s->palette[palette_ptr] != entry)
260  s->new_palette = 1;
261  s->palette[palette_ptr++] = entry;
262  }
263  }
264  break;
265 
266  case FLI_DELTA:
267  y_ptr = 0;
268  compressed_lines = bytestream2_get_le16(&g2);
269  while (compressed_lines > 0) {
270  if (bytestream2_tell(&g2) + 2 > stream_ptr_after_chunk)
271  break;
272  line_packets = bytestream2_get_le16(&g2);
273  if ((line_packets & 0xC000) == 0xC000) {
274  // line skip opcode
275  line_packets = -line_packets;
276  y_ptr += line_packets * s->frame->linesize[0];
277  } else if ((line_packets & 0xC000) == 0x4000) {
278  av_log(avctx, AV_LOG_ERROR, "Undefined opcode (%x) in DELTA_FLI\n", line_packets);
279  } else if ((line_packets & 0xC000) == 0x8000) {
280  // "last byte" opcode
281  pixel_ptr= y_ptr + s->frame->linesize[0] - 1;
282  CHECK_PIXEL_PTR(0);
283  pixels[pixel_ptr] = line_packets & 0xff;
284  } else {
285  compressed_lines--;
286  pixel_ptr = y_ptr;
287  CHECK_PIXEL_PTR(0);
288  pixel_countdown = s->avctx->width;
289  for (i = 0; i < line_packets; i++) {
290  if (bytestream2_tell(&g2) + 2 > stream_ptr_after_chunk)
291  break;
292  /* account for the skip bytes */
293  pixel_skip = bytestream2_get_byte(&g2);
294  pixel_ptr += pixel_skip;
295  pixel_countdown -= pixel_skip;
296  byte_run = sign_extend(bytestream2_get_byte(&g2), 8);
297  if (byte_run < 0) {
298  byte_run = -byte_run;
299  palette_idx1 = bytestream2_get_byte(&g2);
300  palette_idx2 = bytestream2_get_byte(&g2);
301  CHECK_PIXEL_PTR(byte_run * 2);
302  for (j = 0; j < byte_run; j++, pixel_countdown -= 2) {
303  pixels[pixel_ptr++] = palette_idx1;
304  pixels[pixel_ptr++] = palette_idx2;
305  }
306  } else {
307  CHECK_PIXEL_PTR(byte_run * 2);
308  if (bytestream2_tell(&g2) + byte_run * 2 > stream_ptr_after_chunk)
309  break;
310  for (j = 0; j < byte_run * 2; j++, pixel_countdown--) {
311  pixels[pixel_ptr++] = bytestream2_get_byte(&g2);
312  }
313  }
314  }
315 
316  y_ptr += s->frame->linesize[0];
317  }
318  }
319  break;
320 
321  case FLI_LC:
322  /* line compressed */
323  starting_line = bytestream2_get_le16(&g2);
324  y_ptr = 0;
325  y_ptr += starting_line * s->frame->linesize[0];
326 
327  compressed_lines = bytestream2_get_le16(&g2);
328  while (compressed_lines > 0) {
329  pixel_ptr = y_ptr;
330  CHECK_PIXEL_PTR(0);
331  pixel_countdown = s->avctx->width;
332  if (bytestream2_tell(&g2) + 1 > stream_ptr_after_chunk)
333  break;
334  line_packets = bytestream2_get_byte(&g2);
335  if (line_packets > 0) {
336  for (i = 0; i < line_packets; i++) {
337  /* account for the skip bytes */
338  if (bytestream2_tell(&g2) + 1 > stream_ptr_after_chunk)
339  break;
340  pixel_skip = bytestream2_get_byte(&g2);
341  pixel_ptr += pixel_skip;
342  pixel_countdown -= pixel_skip;
343  byte_run = sign_extend(bytestream2_get_byte(&g2),8);
344  if (byte_run > 0) {
345  CHECK_PIXEL_PTR(byte_run);
346  if (bytestream2_tell(&g2) + byte_run > stream_ptr_after_chunk)
347  break;
348  for (j = 0; j < byte_run; j++, pixel_countdown--) {
349  pixels[pixel_ptr++] = bytestream2_get_byte(&g2);
350  }
351  } else if (byte_run < 0) {
352  byte_run = -byte_run;
353  palette_idx1 = bytestream2_get_byte(&g2);
354  CHECK_PIXEL_PTR(byte_run);
355  for (j = 0; j < byte_run; j++, pixel_countdown--) {
356  pixels[pixel_ptr++] = palette_idx1;
357  }
358  }
359  }
360  }
361 
362  y_ptr += s->frame->linesize[0];
363  compressed_lines--;
364  }
365  break;
366 
367  case FLI_BLACK:
368  /* set the whole frame to color 0 (which is usually black) */
369  memset(pixels, 0,
370  s->frame->linesize[0] * s->avctx->height);
371  break;
372 
373  case FLI_BRUN:
374  /* Byte run compression: This chunk type only occurs in the first
375  * FLI frame and it will update the entire frame. */
376  y_ptr = 0;
377  for (lines = 0; lines < s->avctx->height; lines++) {
378  pixel_ptr = y_ptr;
379  /* disregard the line packets; instead, iterate through all
380  * pixels on a row */
381  bytestream2_skip(&g2, 1);
382  pixel_countdown = s->avctx->width;
383  while (pixel_countdown > 0) {
384  if (bytestream2_tell(&g2) + 1 > stream_ptr_after_chunk)
385  break;
386  byte_run = sign_extend(bytestream2_get_byte(&g2), 8);
387  if (!byte_run) {
388  av_log(avctx, AV_LOG_ERROR, "Invalid byte run value.\n");
389  return AVERROR_INVALIDDATA;
390  }
391 
392  if (byte_run > 0) {
393  palette_idx1 = bytestream2_get_byte(&g2);
394  CHECK_PIXEL_PTR(byte_run);
395  for (j = 0; j < byte_run; j++) {
396  pixels[pixel_ptr++] = palette_idx1;
397  pixel_countdown--;
398  if (pixel_countdown < 0)
399  av_log(avctx, AV_LOG_ERROR, "pixel_countdown < 0 (%d) at line %d\n",
400  pixel_countdown, lines);
401  }
402  } else { /* copy bytes if byte_run < 0 */
403  byte_run = -byte_run;
404  CHECK_PIXEL_PTR(byte_run);
405  if (bytestream2_tell(&g2) + byte_run > stream_ptr_after_chunk)
406  break;
407  for (j = 0; j < byte_run; j++) {
408  pixels[pixel_ptr++] = bytestream2_get_byte(&g2);
409  pixel_countdown--;
410  if (pixel_countdown < 0)
411  av_log(avctx, AV_LOG_ERROR, "pixel_countdown < 0 (%d) at line %d\n",
412  pixel_countdown, lines);
413  }
414  }
415  }
416 
417  y_ptr += s->frame->linesize[0];
418  }
419  break;
420 
421  case FLI_COPY:
422  /* copy the chunk (uncompressed frame) */
423  if (chunk_size - 6 != FFALIGN(s->avctx->width, 4) * s->avctx->height) {
424  av_log(avctx, AV_LOG_ERROR, "In chunk FLI_COPY : source data (%d bytes) " \
425  "has incorrect size, skipping chunk\n", chunk_size - 6);
426  bytestream2_skip(&g2, chunk_size - 6);
427  } else {
428  for (y_ptr = 0; y_ptr < s->frame->linesize[0] * s->avctx->height;
429  y_ptr += s->frame->linesize[0]) {
430  bytestream2_get_buffer(&g2, &pixels[y_ptr],
431  s->avctx->width);
432  if (s->avctx->width & 3)
433  bytestream2_skip(&g2, 4 - (s->avctx->width & 3));
434  }
435  }
436  break;
437 
438  case FLI_MINI:
439  /* some sort of a thumbnail? disregard this chunk... */
440  break;
441 
442  default:
443  av_log(avctx, AV_LOG_ERROR, "Unrecognized chunk type: %d\n", chunk_type);
444  break;
445  }
446 
447  if (stream_ptr_after_chunk - bytestream2_tell(&g2) > 0)
448  bytestream2_skip(&g2, stream_ptr_after_chunk - bytestream2_tell(&g2));
449 
450  frame_size -= chunk_size;
451  num_chunks--;
452  }
453 
454  /* by the end of the chunk, the stream ptr should equal the frame
455  * size (minus 1 or 2, possibly); if it doesn't, issue a warning */
456  if (bytestream2_get_bytes_left(&g2) > 2)
457  av_log(avctx, AV_LOG_ERROR, "Processed FLI chunk where chunk size = %d " \
458  "and final chunk ptr = %d\n", buf_size,
459  buf_size - bytestream2_get_bytes_left(&g2));
460 
461  /* make the palette available on the way out */
462  memcpy(s->frame->data[1], s->palette, AVPALETTE_SIZE);
463  if (s->new_palette) {
464  s->frame->palette_has_changed = 1;
465  s->new_palette = 0;
466  }
467 
468  if ((ret = av_frame_ref(data, s->frame)) < 0)
469  return ret;
470 
471  *got_frame = 1;
472 
473  return buf_size;
474 }
475 
477  void *data, int *got_frame,
478  const uint8_t *buf, int buf_size)
479 {
480  /* Note, the only difference between the 15Bpp and 16Bpp */
481  /* Format is the pixel format, the packets are processed the same. */
482  FlicDecodeContext *s = avctx->priv_data;
483 
484  GetByteContext g2;
485  int pixel_ptr;
486  unsigned char palette_idx1;
487 
488  unsigned int frame_size;
489  int num_chunks;
490 
491  unsigned int chunk_size;
492  int chunk_type;
493 
494  int i, j, ret;
495 
496  int lines;
497  int compressed_lines;
498  signed short line_packets;
499  int y_ptr;
500  int byte_run;
501  int pixel_skip;
502  int pixel_countdown;
503  unsigned char *pixels;
504  int pixel;
505  unsigned int pixel_limit;
506 
507  bytestream2_init(&g2, buf, buf_size);
508 
509  if ((ret = ff_reget_buffer(avctx, s->frame)) < 0)
510  return ret;
511 
512  pixels = s->frame->data[0];
513  pixel_limit = s->avctx->height * s->frame->linesize[0];
514 
515  frame_size = bytestream2_get_le32(&g2);
516  bytestream2_skip(&g2, 2); /* skip the magic number */
517  num_chunks = bytestream2_get_le16(&g2);
518  bytestream2_skip(&g2, 8); /* skip padding */
519  if (frame_size > buf_size)
520  frame_size = buf_size;
521 
522  frame_size -= 16;
523 
524  /* iterate through the chunks */
525  while ((frame_size > 0) && (num_chunks > 0) &&
526  bytestream2_get_bytes_left(&g2) >= 4) {
527  int stream_ptr_after_chunk;
528  chunk_size = bytestream2_get_le32(&g2);
529  if (chunk_size > frame_size) {
530  av_log(avctx, AV_LOG_WARNING,
531  "Invalid chunk_size = %u > frame_size = %u\n", chunk_size, frame_size);
532  chunk_size = frame_size;
533  }
534  stream_ptr_after_chunk = bytestream2_tell(&g2) - 4 + chunk_size;
535 
536  chunk_type = bytestream2_get_le16(&g2);
537 
538 
539  switch (chunk_type) {
540  case FLI_256_COLOR:
541  case FLI_COLOR:
542  /* For some reason, it seems that non-palettized flics do
543  * include one of these chunks in their first frame.
544  * Why I do not know, it seems rather extraneous. */
545  ff_dlog(avctx,
546  "Unexpected Palette chunk %d in non-palettized FLC\n",
547  chunk_type);
548  bytestream2_skip(&g2, chunk_size - 6);
549  break;
550 
551  case FLI_DELTA:
552  case FLI_DTA_LC:
553  y_ptr = 0;
554  compressed_lines = bytestream2_get_le16(&g2);
555  while (compressed_lines > 0) {
556  if (bytestream2_tell(&g2) + 2 > stream_ptr_after_chunk)
557  break;
558  line_packets = bytestream2_get_le16(&g2);
559  if (line_packets < 0) {
560  line_packets = -line_packets;
561  y_ptr += line_packets * s->frame->linesize[0];
562  } else {
563  compressed_lines--;
564  pixel_ptr = y_ptr;
565  CHECK_PIXEL_PTR(0);
566  pixel_countdown = s->avctx->width;
567  for (i = 0; i < line_packets; i++) {
568  /* account for the skip bytes */
569  if (bytestream2_tell(&g2) + 2 > stream_ptr_after_chunk)
570  break;
571  pixel_skip = bytestream2_get_byte(&g2);
572  pixel_ptr += (pixel_skip*2); /* Pixel is 2 bytes wide */
573  pixel_countdown -= pixel_skip;
574  byte_run = sign_extend(bytestream2_get_byte(&g2), 8);
575  if (byte_run < 0) {
576  byte_run = -byte_run;
577  pixel = bytestream2_get_le16(&g2);
578  CHECK_PIXEL_PTR(2 * byte_run);
579  for (j = 0; j < byte_run; j++, pixel_countdown -= 2) {
580  *((signed short*)(&pixels[pixel_ptr])) = pixel;
581  pixel_ptr += 2;
582  }
583  } else {
584  if (bytestream2_tell(&g2) + 2*byte_run > stream_ptr_after_chunk)
585  break;
586  CHECK_PIXEL_PTR(2 * byte_run);
587  for (j = 0; j < byte_run; j++, pixel_countdown--) {
588  *((signed short*)(&pixels[pixel_ptr])) = bytestream2_get_le16(&g2);
589  pixel_ptr += 2;
590  }
591  }
592  }
593 
594  y_ptr += s->frame->linesize[0];
595  }
596  }
597  break;
598 
599  case FLI_LC:
600  av_log(avctx, AV_LOG_ERROR, "Unexpected FLI_LC chunk in non-palettized FLC\n");
601  bytestream2_skip(&g2, chunk_size - 6);
602  break;
603 
604  case FLI_BLACK:
605  /* set the whole frame to 0x0000 which is black in both 15Bpp and 16Bpp modes. */
606  memset(pixels, 0x0000,
607  s->frame->linesize[0] * s->avctx->height);
608  break;
609 
610  case FLI_BRUN:
611  y_ptr = 0;
612  for (lines = 0; lines < s->avctx->height; lines++) {
613  pixel_ptr = y_ptr;
614  /* disregard the line packets; instead, iterate through all
615  * pixels on a row */
616  bytestream2_skip(&g2, 1);
617  pixel_countdown = (s->avctx->width * 2);
618 
619  while (pixel_countdown > 0) {
620  if (bytestream2_tell(&g2) + 1 > stream_ptr_after_chunk)
621  break;
622  byte_run = sign_extend(bytestream2_get_byte(&g2), 8);
623  if (byte_run > 0) {
624  palette_idx1 = bytestream2_get_byte(&g2);
625  CHECK_PIXEL_PTR(byte_run);
626  for (j = 0; j < byte_run; j++) {
627  pixels[pixel_ptr++] = palette_idx1;
628  pixel_countdown--;
629  if (pixel_countdown < 0)
630  av_log(avctx, AV_LOG_ERROR, "pixel_countdown < 0 (%d) (linea%d)\n",
631  pixel_countdown, lines);
632  }
633  } else { /* copy bytes if byte_run < 0 */
634  byte_run = -byte_run;
635  if (bytestream2_tell(&g2) + byte_run > stream_ptr_after_chunk)
636  break;
637  CHECK_PIXEL_PTR(byte_run);
638  for (j = 0; j < byte_run; j++) {
639  palette_idx1 = bytestream2_get_byte(&g2);
640  pixels[pixel_ptr++] = palette_idx1;
641  pixel_countdown--;
642  if (pixel_countdown < 0)
643  av_log(avctx, AV_LOG_ERROR, "pixel_countdown < 0 (%d) at line %d\n",
644  pixel_countdown, lines);
645  }
646  }
647  }
648 
649  /* Now FLX is strange, in that it is "byte" as opposed to "pixel" run length compressed.
650  * This does not give us any good opportunity to perform word endian conversion
651  * during decompression. So if it is required (i.e., this is not a LE target, we do
652  * a second pass over the line here, swapping the bytes.
653  */
654 #if HAVE_BIGENDIAN
655  pixel_ptr = y_ptr;
656  pixel_countdown = s->avctx->width;
657  while (pixel_countdown > 0) {
658  *((signed short*)(&pixels[pixel_ptr])) = AV_RL16(&buf[pixel_ptr]);
659  pixel_ptr += 2;
660  }
661 #endif
662  y_ptr += s->frame->linesize[0];
663  }
664  break;
665 
666  case FLI_DTA_BRUN:
667  y_ptr = 0;
668  for (lines = 0; lines < s->avctx->height; lines++) {
669  pixel_ptr = y_ptr;
670  /* disregard the line packets; instead, iterate through all
671  * pixels on a row */
672  bytestream2_skip(&g2, 1);
673  pixel_countdown = s->avctx->width; /* Width is in pixels, not bytes */
674 
675  while (pixel_countdown > 0) {
676  if (bytestream2_tell(&g2) + 1 > stream_ptr_after_chunk)
677  break;
678  byte_run = sign_extend(bytestream2_get_byte(&g2), 8);
679  if (byte_run > 0) {
680  pixel = bytestream2_get_le16(&g2);
681  CHECK_PIXEL_PTR(2 * byte_run);
682  for (j = 0; j < byte_run; j++) {
683  *((signed short*)(&pixels[pixel_ptr])) = pixel;
684  pixel_ptr += 2;
685  pixel_countdown--;
686  if (pixel_countdown < 0)
687  av_log(avctx, AV_LOG_ERROR, "pixel_countdown < 0 (%d)\n",
688  pixel_countdown);
689  }
690  } else { /* copy pixels if byte_run < 0 */
691  byte_run = -byte_run;
692  if (bytestream2_tell(&g2) + 2 * byte_run > stream_ptr_after_chunk)
693  break;
694  CHECK_PIXEL_PTR(2 * byte_run);
695  for (j = 0; j < byte_run; j++) {
696  *((signed short*)(&pixels[pixel_ptr])) = bytestream2_get_le16(&g2);
697  pixel_ptr += 2;
698  pixel_countdown--;
699  if (pixel_countdown < 0)
700  av_log(avctx, AV_LOG_ERROR, "pixel_countdown < 0 (%d)\n",
701  pixel_countdown);
702  }
703  }
704  }
705 
706  y_ptr += s->frame->linesize[0];
707  }
708  break;
709 
710  case FLI_COPY:
711  case FLI_DTA_COPY:
712  /* copy the chunk (uncompressed frame) */
713  if (chunk_size - 6 > (unsigned int)(FFALIGN(s->avctx->width, 2) * s->avctx->height)*2) {
714  av_log(avctx, AV_LOG_ERROR, "In chunk FLI_COPY : source data (%d bytes) " \
715  "bigger than image, skipping chunk\n", chunk_size - 6);
716  bytestream2_skip(&g2, chunk_size - 6);
717  } else {
718 
719  for (y_ptr = 0; y_ptr < s->frame->linesize[0] * s->avctx->height;
720  y_ptr += s->frame->linesize[0]) {
721 
722  pixel_countdown = s->avctx->width;
723  pixel_ptr = 0;
724  while (pixel_countdown > 0) {
725  *((signed short*)(&pixels[y_ptr + pixel_ptr])) = bytestream2_get_le16(&g2);
726  pixel_ptr += 2;
727  pixel_countdown--;
728  }
729  if (s->avctx->width & 1)
730  bytestream2_skip(&g2, 2);
731  }
732  }
733  break;
734 
735  case FLI_MINI:
736  /* some sort of a thumbnail? disregard this chunk... */
737  bytestream2_skip(&g2, chunk_size - 6);
738  break;
739 
740  default:
741  av_log(avctx, AV_LOG_ERROR, "Unrecognized chunk type: %d\n", chunk_type);
742  break;
743  }
744 
745  frame_size -= chunk_size;
746  num_chunks--;
747  }
748 
749  /* by the end of the chunk, the stream ptr should equal the frame
750  * size (minus 1, possibly); if it doesn't, issue a warning */
751  if ((bytestream2_get_bytes_left(&g2) != 0) && (bytestream2_get_bytes_left(&g2) != 1))
752  av_log(avctx, AV_LOG_ERROR, "Processed FLI chunk where chunk size = %d " \
753  "and final chunk ptr = %d\n", buf_size, bytestream2_tell(&g2));
754 
755  if ((ret = av_frame_ref(data, s->frame)) < 0)
756  return ret;
757 
758  *got_frame = 1;
759 
760  return buf_size;
761 }
762 
764  void *data, int *got_frame,
765  const uint8_t *buf, int buf_size)
766 {
767  FlicDecodeContext *s = avctx->priv_data;
768 
769  GetByteContext g2;
770  int pixel_ptr;
771  unsigned char palette_idx1;
772 
773  unsigned int frame_size;
774  int num_chunks;
775 
776  unsigned int chunk_size;
777  int chunk_type;
778 
779  int i, j, ret;
780 
781  int lines;
782  int compressed_lines;
783  signed short line_packets;
784  int y_ptr;
785  int byte_run;
786  int pixel_skip;
787  int pixel_countdown;
788  unsigned char *pixels;
789  int pixel;
790  unsigned int pixel_limit;
791 
792  bytestream2_init(&g2, buf, buf_size);
793 
794  if ((ret = ff_reget_buffer(avctx, s->frame)) < 0)
795  return ret;
796 
797  pixels = s->frame->data[0];
798  pixel_limit = s->avctx->height * s->frame->linesize[0];
799 
800  frame_size = bytestream2_get_le32(&g2);
801  bytestream2_skip(&g2, 2); /* skip the magic number */
802  num_chunks = bytestream2_get_le16(&g2);
803  bytestream2_skip(&g2, 8); /* skip padding */
804  if (frame_size > buf_size)
805  frame_size = buf_size;
806 
807  frame_size -= 16;
808 
809  /* iterate through the chunks */
810  while ((frame_size > 0) && (num_chunks > 0) &&
811  bytestream2_get_bytes_left(&g2) >= 4) {
812  int stream_ptr_after_chunk;
813  chunk_size = bytestream2_get_le32(&g2);
814  if (chunk_size > frame_size) {
815  av_log(avctx, AV_LOG_WARNING,
816  "Invalid chunk_size = %u > frame_size = %u\n", chunk_size, frame_size);
817  chunk_size = frame_size;
818  }
819  stream_ptr_after_chunk = bytestream2_tell(&g2) - 4 + chunk_size;
820 
821  chunk_type = bytestream2_get_le16(&g2);
822 
823 
824  switch (chunk_type) {
825  case FLI_256_COLOR:
826  case FLI_COLOR:
827  /* For some reason, it seems that non-palettized flics do
828  * include one of these chunks in their first frame.
829  * Why I do not know, it seems rather extraneous. */
830  ff_dlog(avctx,
831  "Unexpected Palette chunk %d in non-palettized FLC\n",
832  chunk_type);
833  bytestream2_skip(&g2, chunk_size - 6);
834  break;
835 
836  case FLI_DELTA:
837  case FLI_DTA_LC:
838  y_ptr = 0;
839  compressed_lines = bytestream2_get_le16(&g2);
840  while (compressed_lines > 0) {
841  if (bytestream2_tell(&g2) + 2 > stream_ptr_after_chunk)
842  break;
843  line_packets = bytestream2_get_le16(&g2);
844  if (line_packets < 0) {
845  line_packets = -line_packets;
846  y_ptr += line_packets * s->frame->linesize[0];
847  } else {
848  compressed_lines--;
849  pixel_ptr = y_ptr;
850  CHECK_PIXEL_PTR(0);
851  pixel_countdown = s->avctx->width;
852  for (i = 0; i < line_packets; i++) {
853  /* account for the skip bytes */
854  if (bytestream2_tell(&g2) + 2 > stream_ptr_after_chunk)
855  break;
856  pixel_skip = bytestream2_get_byte(&g2);
857  pixel_ptr += (pixel_skip*3); /* Pixel is 3 bytes wide */
858  pixel_countdown -= pixel_skip;
859  byte_run = sign_extend(bytestream2_get_byte(&g2), 8);
860  if (byte_run < 0) {
861  byte_run = -byte_run;
862  pixel = bytestream2_get_le24(&g2);
863  CHECK_PIXEL_PTR(3 * byte_run);
864  for (j = 0; j < byte_run; j++, pixel_countdown -= 1) {
865  AV_WL24(&pixels[pixel_ptr], pixel);
866  pixel_ptr += 3;
867  }
868  } else {
869  if (bytestream2_tell(&g2) + 2*byte_run > stream_ptr_after_chunk)
870  break;
871  CHECK_PIXEL_PTR(2 * byte_run);
872  for (j = 0; j < byte_run; j++, pixel_countdown--) {
873  pixel = bytestream2_get_le24(&g2);
874  AV_WL24(&pixels[pixel_ptr], pixel);
875  pixel_ptr += 3;
876  }
877  }
878  }
879 
880  y_ptr += s->frame->linesize[0];
881  }
882  }
883  break;
884 
885  case FLI_LC:
886  av_log(avctx, AV_LOG_ERROR, "Unexpected FLI_LC chunk in non-palettized FLC\n");
887  bytestream2_skip(&g2, chunk_size - 6);
888  break;
889 
890  case FLI_BLACK:
891  /* set the whole frame to 0x00 which is black for 24 bit mode. */
892  memset(pixels, 0x00,
893  s->frame->linesize[0] * s->avctx->height);
894  break;
895 
896  case FLI_BRUN:
897  y_ptr = 0;
898  for (lines = 0; lines < s->avctx->height; lines++) {
899  pixel_ptr = y_ptr;
900  /* disregard the line packets; instead, iterate through all
901  * pixels on a row */
902  bytestream2_skip(&g2, 1);
903  pixel_countdown = (s->avctx->width * 3);
904 
905  while (pixel_countdown > 0) {
906  if (bytestream2_tell(&g2) + 1 > stream_ptr_after_chunk)
907  break;
908  byte_run = sign_extend(bytestream2_get_byte(&g2), 8);
909  if (byte_run > 0) {
910  palette_idx1 = bytestream2_get_byte(&g2);
911  CHECK_PIXEL_PTR(byte_run);
912  for (j = 0; j < byte_run; j++) {
913  pixels[pixel_ptr++] = palette_idx1;
914  pixel_countdown--;
915  if (pixel_countdown < 0)
916  av_log(avctx, AV_LOG_ERROR, "pixel_countdown < 0 (%d) (linea%d)\n",
917  pixel_countdown, lines);
918  }
919  } else { /* copy bytes if byte_run < 0 */
920  byte_run = -byte_run;
921  if (bytestream2_tell(&g2) + byte_run > stream_ptr_after_chunk)
922  break;
923  CHECK_PIXEL_PTR(byte_run);
924  for (j = 0; j < byte_run; j++) {
925  palette_idx1 = bytestream2_get_byte(&g2);
926  pixels[pixel_ptr++] = palette_idx1;
927  pixel_countdown--;
928  if (pixel_countdown < 0)
929  av_log(avctx, AV_LOG_ERROR, "pixel_countdown < 0 (%d) at line %d\n",
930  pixel_countdown, lines);
931  }
932  }
933  }
934 
935  y_ptr += s->frame->linesize[0];
936  }
937  break;
938 
939  case FLI_DTA_BRUN:
940  y_ptr = 0;
941  for (lines = 0; lines < s->avctx->height; lines++) {
942  pixel_ptr = y_ptr;
943  /* disregard the line packets; instead, iterate through all
944  * pixels on a row */
945  bytestream2_skip(&g2, 1);
946  pixel_countdown = s->avctx->width; /* Width is in pixels, not bytes */
947 
948  while (pixel_countdown > 0) {
949  if (bytestream2_tell(&g2) + 1 > stream_ptr_after_chunk)
950  break;
951  byte_run = sign_extend(bytestream2_get_byte(&g2), 8);
952  if (byte_run > 0) {
953  pixel = bytestream2_get_le24(&g2);
954  CHECK_PIXEL_PTR(3 * byte_run);
955  for (j = 0; j < byte_run; j++) {
956  AV_WL24(pixels + pixel_ptr, pixel);
957  pixel_ptr += 3;
958  pixel_countdown--;
959  if (pixel_countdown < 0)
960  av_log(avctx, AV_LOG_ERROR, "pixel_countdown < 0 (%d)\n",
961  pixel_countdown);
962  }
963  } else { /* copy pixels if byte_run < 0 */
964  byte_run = -byte_run;
965  if (bytestream2_tell(&g2) + 3 * byte_run > stream_ptr_after_chunk)
966  break;
967  CHECK_PIXEL_PTR(3 * byte_run);
968  for (j = 0; j < byte_run; j++) {
969  pixel = bytestream2_get_le24(&g2);
970  AV_WL24(pixels + pixel_ptr, pixel);
971  pixel_ptr += 3;
972  pixel_countdown--;
973  if (pixel_countdown < 0)
974  av_log(avctx, AV_LOG_ERROR, "pixel_countdown < 0 (%d)\n",
975  pixel_countdown);
976  }
977  }
978  }
979 
980  y_ptr += s->frame->linesize[0];
981  }
982  break;
983 
984  case FLI_COPY:
985  case FLI_DTA_COPY:
986  /* copy the chunk (uncompressed frame) */
987  if (chunk_size - 6 > (unsigned int)(FFALIGN(s->avctx->width, 2) * s->avctx->height)*3) {
988  av_log(avctx, AV_LOG_ERROR, "In chunk FLI_COPY : source data (%d bytes) " \
989  "bigger than image, skipping chunk\n", chunk_size - 6);
990  bytestream2_skip(&g2, chunk_size - 6);
991  } else {
992  for (y_ptr = 0; y_ptr < s->frame->linesize[0] * s->avctx->height;
993  y_ptr += s->frame->linesize[0]) {
994 
995  pixel_countdown = s->avctx->width;
996  pixel_ptr = 0;
997  while (pixel_countdown > 0) {
998  pixel = bytestream2_get_le24(&g2);
999  AV_WL24(&pixels[y_ptr + pixel_ptr], pixel);
1000  pixel_ptr += 3;
1001  pixel_countdown--;
1002  }
1003  if (s->avctx->width & 1)
1004  bytestream2_skip(&g2, 3);
1005  }
1006  }
1007  break;
1008 
1009  case FLI_MINI:
1010  /* some sort of a thumbnail? disregard this chunk... */
1011  bytestream2_skip(&g2, chunk_size - 6);
1012  break;
1013 
1014  default:
1015  av_log(avctx, AV_LOG_ERROR, "Unrecognized chunk type: %d\n", chunk_type);
1016  break;
1017  }
1018 
1019  frame_size -= chunk_size;
1020  num_chunks--;
1021  }
1022 
1023  /* by the end of the chunk, the stream ptr should equal the frame
1024  * size (minus 1, possibly); if it doesn't, issue a warning */
1025  if ((bytestream2_get_bytes_left(&g2) != 0) && (bytestream2_get_bytes_left(&g2) != 1))
1026  av_log(avctx, AV_LOG_ERROR, "Processed FLI chunk where chunk size = %d " \
1027  "and final chunk ptr = %d\n", buf_size, bytestream2_tell(&g2));
1028 
1029  if ((ret = av_frame_ref(data, s->frame)) < 0)
1030  return ret;
1031 
1032  *got_frame = 1;
1033 
1034  return buf_size;
1035 }
1036 
1038  void *data, int *got_frame,
1039  AVPacket *avpkt)
1040 {
1041  const uint8_t *buf = avpkt->data;
1042  int buf_size = avpkt->size;
1043  if (avctx->pix_fmt == AV_PIX_FMT_PAL8) {
1044  return flic_decode_frame_8BPP(avctx, data, got_frame,
1045  buf, buf_size);
1046  } else if ((avctx->pix_fmt == AV_PIX_FMT_RGB555) ||
1047  (avctx->pix_fmt == AV_PIX_FMT_RGB565)) {
1048  return flic_decode_frame_15_16BPP(avctx, data, got_frame,
1049  buf, buf_size);
1050  } else if (avctx->pix_fmt == AV_PIX_FMT_BGR24) {
1051  return flic_decode_frame_24BPP(avctx, data, got_frame,
1052  buf, buf_size);
1053  }
1054 
1055  /* Should not get here, ever as the pix_fmt is processed */
1056  /* in flic_decode_init and the above if should deal with */
1057  /* the finite set of possibilities allowable by here. */
1058  /* But in case we do, just error out. */
1059  av_log(avctx, AV_LOG_ERROR, "Unknown FLC format, my science cannot explain how this happened.\n");
1060  return AVERROR_BUG;
1061 }
1062 
1063 
1065 {
1066  FlicDecodeContext *s = avctx->priv_data;
1067 
1068  av_frame_free(&s->frame);
1069 
1070  return 0;
1071 }
1072 
1074  .name = "flic",
1075  .long_name = NULL_IF_CONFIG_SMALL("Autodesk Animator Flic video"),
1076  .type = AVMEDIA_TYPE_VIDEO,
1077  .id = AV_CODEC_ID_FLIC,
1078  .priv_data_size = sizeof(FlicDecodeContext),
1080  .close = flic_decode_end,
1082  .capabilities = AV_CODEC_CAP_DR1,
1083 };
#define FLI_DTA_COPY
Definition: flicvideo.c:56
AVCodecContext * avctx
Definition: flicvideo.c:72
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:187
#define FLI_TYPE_CODE
Definition: flicvideo.c:59
ptrdiff_t const GLvoid * data
Definition: opengl_enc.c:101
#define FLI_MINI
Definition: flicvideo.c:54
#define AV_LOG_WARNING
Something somehow does not look correct.
Definition: log.h:182
#define CHECK_PIXEL_PTR(n)
Definition: flicvideo.c:64
const char * g
Definition: vf_curves.c:112
static av_cold int init(AVCodecContext *avctx)
Definition: avrndec.c:35
#define FLI_COPY
Definition: flicvideo.c:53
int size
Definition: avcodec.h:1648
const char * b
Definition: vf_curves.c:113
enum AVPixelFormat pix_fmt
Pixel format, see AV_PIX_FMT_xxx.
Definition: avcodec.h:1950
static av_always_inline void bytestream2_init(GetByteContext *g, const uint8_t *buf, int buf_size)
Definition: bytestream.h:133
static int flic_decode_frame_15_16BPP(AVCodecContext *avctx, void *data, int *got_frame, const uint8_t *buf, int buf_size)
Definition: flicvideo.c:476
AVCodec.
Definition: avcodec.h:3671
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_WL32 unsigned int_TMPL AV_WL24 unsigned int_TMPL AV_RL16
Definition: bytestream.h:87
static int flic_decode_frame_8BPP(AVCodecContext *avctx, void *data, int *got_frame, const uint8_t *buf, int buf_size)
Definition: flicvideo.c:150
#define AV_WL24(p, d)
Definition: intreadwrite.h:469
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:150
8 bits with AV_PIX_FMT_RGB32 palette
Definition: pixfmt.h:73
#define AVPALETTE_SIZE
Definition: pixfmt.h:32
#define FLI_COLOR
Definition: flicvideo.c:49
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:388
uint8_t * extradata
some codecs need / can use extradata like Huffman tables.
Definition: avcodec.h:1837
uint8_t * data
Definition: avcodec.h:1647
#define ff_dlog(a,...)
#define FLI_LC
Definition: flicvideo.c:50
#define FFALIGN(x, a)
Definition: macros.h:48
#define av_log(a,...)
#define U(x)
Definition: vp56_arith.h:37
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:176
#define FLI_BRUN
Definition: flicvideo.c:52
AVFrame * frame
Definition: flicvideo.c:73
#define AVERROR(e)
Definition: error.h:43
static int flic_decode_frame_24BPP(AVCodecContext *avctx, void *data, int *got_frame, const uint8_t *buf, int buf_size)
Definition: flicvideo.c:763
static av_always_inline void bytestream2_skip(GetByteContext *g, unsigned int size)
Definition: bytestream.h:164
void av_frame_free(AVFrame **frame)
Free the frame and any dynamically allocated objects in it, e.g.
Definition: frame.c:163
#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 av_always_inline unsigned int bytestream2_get_buffer(GetByteContext *g, uint8_t *dst, unsigned int size)
Definition: bytestream.h:263
static av_always_inline unsigned int bytestream2_get_bytes_left(GetByteContext *g)
Definition: bytestream.h:154
#define FLC_MAGIC_CARPET_SYNTHETIC_TYPE_CODE
Definition: flicvideo.c:62
const char * name
Name of the codec implementation.
Definition: avcodec.h:3678
int depth
Definition: v4l.c:62
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
#define FLI_DTA_BRUN
Definition: flicvideo.c:55
int width
picture width / height.
Definition: avcodec.h:1909
#define FLC_FLX_TYPE_CODE
Definition: flicvideo.c:60
#define FLI_256_COLOR
Definition: flicvideo.c:47
packed RGB 8:8:8, 24bpp, BGRBGR...
Definition: pixfmt.h:65
#define FLI_DELTA
Definition: flicvideo.c:48
static av_always_inline int bytestream2_tell(GetByteContext *g)
Definition: bytestream.h:188
int frame_size
Definition: mxfenc.c:1820
Libavcodec external API header.
int linesize[AV_NUM_DATA_POINTERS]
For video, size in bytes of each picture line.
Definition: frame.h:218
main external API structure.
Definition: avcodec.h:1722
void * buf
Definition: avisynth_c.h:690
#define FLI_DTA_LC
Definition: flicvideo.c:57
int extradata_size
Definition: avcodec.h:1838
#define AVERROR_BUG
Internal bug, also see AVERROR_BUG2.
Definition: error.h:50
static int flic_decode_frame(AVCodecContext *avctx, void *data, int *got_frame, AVPacket *avpkt)
Definition: flicvideo.c:1037
static av_cold int flic_decode_end(AVCodecContext *avctx)
Definition: flicvideo.c:1064
int palette_has_changed
Tell user application that palette has changed from previous frame.
Definition: frame.h:335
uint8_t pixel
Definition: tiny_ssim.c:42
static av_const int sign_extend(int val, unsigned bits)
Definition: mathops.h:130
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
Definition: frame.h:201
#define FLI_BLACK
Definition: flicvideo.c:51
common internal api header.
if(ret< 0)
Definition: vf_mcdeint.c:282
#define AV_PIX_FMT_RGB555
Definition: pixfmt.h:339
#define AV_INPUT_BUFFER_PADDING_SIZE
Required number of additionally allocated bytes at the end of the input bitstream for decoding...
Definition: avcodec.h:769
void * priv_data
Definition: avcodec.h:1764
int pixels
Definition: avisynth_c.h:429
unsigned int palette[256]
Definition: flicvideo.c:75
AVCodec ff_flic_decoder
Definition: flicvideo.c:1073
#define AV_PIX_FMT_RGB565
Definition: pixfmt.h:338
static int decode(AVCodecContext *avctx, AVFrame *frame, int *got_frame, AVPacket *pkt)
Definition: ffmpeg.c:2243
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_RL32
Definition: bytestream.h:87
This structure stores compressed data.
Definition: avcodec.h:1624
static av_cold int flic_decode_init(AVCodecContext *avctx)
Definition: flicvideo.c:80
#define AV_CODEC_CAP_DR1
Codec uses get_buffer() for allocating buffers and supports custom allocators.
Definition: avcodec.h:994