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flicvideo.c
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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  if (frame_size < 16)
203  return AVERROR_INVALIDDATA;
204 
205  frame_size -= 16;
206 
207  /* iterate through the chunks */
208  while ((frame_size >= 6) && (num_chunks > 0) &&
209  bytestream2_get_bytes_left(&g2) >= 4) {
210  int stream_ptr_after_chunk;
211  chunk_size = bytestream2_get_le32(&g2);
212  if (chunk_size > frame_size) {
213  av_log(avctx, AV_LOG_WARNING,
214  "Invalid chunk_size = %u > frame_size = %u\n", chunk_size, frame_size);
215  chunk_size = frame_size;
216  }
217  stream_ptr_after_chunk = bytestream2_tell(&g2) - 4 + chunk_size;
218 
219  chunk_type = bytestream2_get_le16(&g2);
220 
221  switch (chunk_type) {
222  case FLI_256_COLOR:
223  case FLI_COLOR:
224  /* check special case: If this file is from the Magic Carpet
225  * game and uses 6-bit colors even though it reports 256-color
226  * chunks in a 0xAF12-type file (fli_type is set to 0xAF13 during
227  * initialization) */
228  if ((chunk_type == FLI_256_COLOR) && (s->fli_type != FLC_MAGIC_CARPET_SYNTHETIC_TYPE_CODE))
229  color_shift = 0;
230  else
231  color_shift = 2;
232  /* set up the palette */
233  color_packets = bytestream2_get_le16(&g2);
234  palette_ptr = 0;
235  for (i = 0; i < color_packets; i++) {
236  /* first byte is how many colors to skip */
237  palette_ptr += bytestream2_get_byte(&g2);
238 
239  /* next byte indicates how many entries to change */
240  color_changes = bytestream2_get_byte(&g2);
241 
242  /* if there are 0 color changes, there are actually 256 */
243  if (color_changes == 0)
244  color_changes = 256;
245 
246  if (bytestream2_tell(&g2) + color_changes * 3 > stream_ptr_after_chunk)
247  break;
248 
249  for (j = 0; j < color_changes; j++) {
250  unsigned int entry;
251 
252  /* wrap around, for good measure */
253  if ((unsigned)palette_ptr >= 256)
254  palette_ptr = 0;
255 
256  r = bytestream2_get_byte(&g2) << color_shift;
257  g = bytestream2_get_byte(&g2) << color_shift;
258  b = bytestream2_get_byte(&g2) << color_shift;
259  entry = 0xFFU << 24 | r << 16 | g << 8 | b;
260  if (color_shift == 2)
261  entry |= entry >> 6 & 0x30303;
262  if (s->palette[palette_ptr] != entry)
263  s->new_palette = 1;
264  s->palette[palette_ptr++] = entry;
265  }
266  }
267  break;
268 
269  case FLI_DELTA:
270  y_ptr = 0;
271  compressed_lines = bytestream2_get_le16(&g2);
272  while (compressed_lines > 0) {
273  if (bytestream2_tell(&g2) + 2 > stream_ptr_after_chunk)
274  break;
275  if (y_ptr > pixel_limit)
276  return AVERROR_INVALIDDATA;
277  line_packets = bytestream2_get_le16(&g2);
278  if ((line_packets & 0xC000) == 0xC000) {
279  // line skip opcode
280  line_packets = -line_packets;
281  if (line_packets > s->avctx->height)
282  return AVERROR_INVALIDDATA;
283  y_ptr += line_packets * s->frame->linesize[0];
284  } else if ((line_packets & 0xC000) == 0x4000) {
285  av_log(avctx, AV_LOG_ERROR, "Undefined opcode (%x) in DELTA_FLI\n", line_packets);
286  } else if ((line_packets & 0xC000) == 0x8000) {
287  // "last byte" opcode
288  pixel_ptr= y_ptr + s->frame->linesize[0] - 1;
289  CHECK_PIXEL_PTR(0);
290  pixels[pixel_ptr] = line_packets & 0xff;
291  } else {
292  compressed_lines--;
293  pixel_ptr = y_ptr;
294  CHECK_PIXEL_PTR(0);
295  pixel_countdown = s->avctx->width;
296  for (i = 0; i < line_packets; i++) {
297  if (bytestream2_tell(&g2) + 2 > stream_ptr_after_chunk)
298  break;
299  /* account for the skip bytes */
300  pixel_skip = bytestream2_get_byte(&g2);
301  pixel_ptr += pixel_skip;
302  pixel_countdown -= pixel_skip;
303  byte_run = sign_extend(bytestream2_get_byte(&g2), 8);
304  if (byte_run < 0) {
305  byte_run = -byte_run;
306  palette_idx1 = bytestream2_get_byte(&g2);
307  palette_idx2 = bytestream2_get_byte(&g2);
308  CHECK_PIXEL_PTR(byte_run * 2);
309  for (j = 0; j < byte_run; j++, pixel_countdown -= 2) {
310  pixels[pixel_ptr++] = palette_idx1;
311  pixels[pixel_ptr++] = palette_idx2;
312  }
313  } else {
314  CHECK_PIXEL_PTR(byte_run * 2);
315  if (bytestream2_tell(&g2) + byte_run * 2 > stream_ptr_after_chunk)
316  break;
317  for (j = 0; j < byte_run * 2; j++, pixel_countdown--) {
318  pixels[pixel_ptr++] = bytestream2_get_byte(&g2);
319  }
320  }
321  }
322 
323  y_ptr += s->frame->linesize[0];
324  }
325  }
326  break;
327 
328  case FLI_LC:
329  /* line compressed */
330  starting_line = bytestream2_get_le16(&g2);
331  if (starting_line >= s->avctx->height)
332  return AVERROR_INVALIDDATA;
333  y_ptr = 0;
334  y_ptr += starting_line * s->frame->linesize[0];
335 
336  compressed_lines = bytestream2_get_le16(&g2);
337  while (compressed_lines > 0) {
338  pixel_ptr = y_ptr;
339  CHECK_PIXEL_PTR(0);
340  pixel_countdown = s->avctx->width;
341  if (bytestream2_tell(&g2) + 1 > stream_ptr_after_chunk)
342  break;
343  line_packets = bytestream2_get_byte(&g2);
344  if (line_packets > 0) {
345  for (i = 0; i < line_packets; i++) {
346  /* account for the skip bytes */
347  if (bytestream2_tell(&g2) + 1 > stream_ptr_after_chunk)
348  break;
349  pixel_skip = bytestream2_get_byte(&g2);
350  pixel_ptr += pixel_skip;
351  pixel_countdown -= pixel_skip;
352  byte_run = sign_extend(bytestream2_get_byte(&g2),8);
353  if (byte_run > 0) {
354  CHECK_PIXEL_PTR(byte_run);
355  if (bytestream2_tell(&g2) + byte_run > stream_ptr_after_chunk)
356  break;
357  for (j = 0; j < byte_run; j++, pixel_countdown--) {
358  pixels[pixel_ptr++] = bytestream2_get_byte(&g2);
359  }
360  } else if (byte_run < 0) {
361  byte_run = -byte_run;
362  palette_idx1 = bytestream2_get_byte(&g2);
363  CHECK_PIXEL_PTR(byte_run);
364  for (j = 0; j < byte_run; j++, pixel_countdown--) {
365  pixels[pixel_ptr++] = palette_idx1;
366  }
367  }
368  }
369  }
370 
371  y_ptr += s->frame->linesize[0];
372  compressed_lines--;
373  }
374  break;
375 
376  case FLI_BLACK:
377  /* set the whole frame to color 0 (which is usually black) */
378  memset(pixels, 0,
379  s->frame->linesize[0] * s->avctx->height);
380  break;
381 
382  case FLI_BRUN:
383  /* Byte run compression: This chunk type only occurs in the first
384  * FLI frame and it will update the entire frame. */
385  y_ptr = 0;
386  for (lines = 0; lines < s->avctx->height; lines++) {
387  pixel_ptr = y_ptr;
388  /* disregard the line packets; instead, iterate through all
389  * pixels on a row */
390  bytestream2_skip(&g2, 1);
391  pixel_countdown = s->avctx->width;
392  while (pixel_countdown > 0) {
393  if (bytestream2_tell(&g2) + 1 > stream_ptr_after_chunk)
394  break;
395  byte_run = sign_extend(bytestream2_get_byte(&g2), 8);
396  if (!byte_run) {
397  av_log(avctx, AV_LOG_ERROR, "Invalid byte run value.\n");
398  return AVERROR_INVALIDDATA;
399  }
400 
401  if (byte_run > 0) {
402  palette_idx1 = bytestream2_get_byte(&g2);
403  CHECK_PIXEL_PTR(byte_run);
404  for (j = 0; j < byte_run; j++) {
405  pixels[pixel_ptr++] = palette_idx1;
406  pixel_countdown--;
407  if (pixel_countdown < 0)
408  av_log(avctx, AV_LOG_ERROR, "pixel_countdown < 0 (%d) at line %d\n",
409  pixel_countdown, lines);
410  }
411  } else { /* copy bytes if byte_run < 0 */
412  byte_run = -byte_run;
413  CHECK_PIXEL_PTR(byte_run);
414  if (bytestream2_tell(&g2) + byte_run > stream_ptr_after_chunk)
415  break;
416  for (j = 0; j < byte_run; j++) {
417  pixels[pixel_ptr++] = bytestream2_get_byte(&g2);
418  pixel_countdown--;
419  if (pixel_countdown < 0)
420  av_log(avctx, AV_LOG_ERROR, "pixel_countdown < 0 (%d) at line %d\n",
421  pixel_countdown, lines);
422  }
423  }
424  }
425 
426  y_ptr += s->frame->linesize[0];
427  }
428  break;
429 
430  case FLI_COPY:
431  /* copy the chunk (uncompressed frame) */
432  if (chunk_size - 6 != FFALIGN(s->avctx->width, 4) * s->avctx->height) {
433  av_log(avctx, AV_LOG_ERROR, "In chunk FLI_COPY : source data (%d bytes) " \
434  "has incorrect size, skipping chunk\n", chunk_size - 6);
435  bytestream2_skip(&g2, chunk_size - 6);
436  } else {
437  for (y_ptr = 0; y_ptr < s->frame->linesize[0] * s->avctx->height;
438  y_ptr += s->frame->linesize[0]) {
439  bytestream2_get_buffer(&g2, &pixels[y_ptr],
440  s->avctx->width);
441  if (s->avctx->width & 3)
442  bytestream2_skip(&g2, 4 - (s->avctx->width & 3));
443  }
444  }
445  break;
446 
447  case FLI_MINI:
448  /* some sort of a thumbnail? disregard this chunk... */
449  break;
450 
451  default:
452  av_log(avctx, AV_LOG_ERROR, "Unrecognized chunk type: %d\n", chunk_type);
453  break;
454  }
455 
456  if (stream_ptr_after_chunk - bytestream2_tell(&g2) >= 0) {
457  bytestream2_skip(&g2, stream_ptr_after_chunk - bytestream2_tell(&g2));
458  } else {
459  av_log(avctx, AV_LOG_ERROR, "Chunk overread\n");
460  break;
461  }
462 
463  frame_size -= chunk_size;
464  num_chunks--;
465  }
466 
467  /* by the end of the chunk, the stream ptr should equal the frame
468  * size (minus 1 or 2, possibly); if it doesn't, issue a warning */
469  if (bytestream2_get_bytes_left(&g2) > 2)
470  av_log(avctx, AV_LOG_ERROR, "Processed FLI chunk where chunk size = %d " \
471  "and final chunk ptr = %d\n", buf_size,
472  buf_size - bytestream2_get_bytes_left(&g2));
473 
474  /* make the palette available on the way out */
475  memcpy(s->frame->data[1], s->palette, AVPALETTE_SIZE);
476  if (s->new_palette) {
477  s->frame->palette_has_changed = 1;
478  s->new_palette = 0;
479  }
480 
481  if ((ret = av_frame_ref(data, s->frame)) < 0)
482  return ret;
483 
484  *got_frame = 1;
485 
486  return buf_size;
487 }
488 
490  void *data, int *got_frame,
491  const uint8_t *buf, int buf_size)
492 {
493  /* Note, the only difference between the 15Bpp and 16Bpp */
494  /* Format is the pixel format, the packets are processed the same. */
495  FlicDecodeContext *s = avctx->priv_data;
496 
497  GetByteContext g2;
498  int pixel_ptr;
499  unsigned char palette_idx1;
500 
501  unsigned int frame_size;
502  int num_chunks;
503 
504  unsigned int chunk_size;
505  int chunk_type;
506 
507  int i, j, ret;
508 
509  int lines;
510  int compressed_lines;
511  signed short line_packets;
512  int y_ptr;
513  int byte_run;
514  int pixel_skip;
515  int pixel_countdown;
516  unsigned char *pixels;
517  int pixel;
518  unsigned int pixel_limit;
519 
520  bytestream2_init(&g2, buf, buf_size);
521 
522  if ((ret = ff_reget_buffer(avctx, s->frame)) < 0)
523  return ret;
524 
525  pixels = s->frame->data[0];
526  pixel_limit = s->avctx->height * s->frame->linesize[0];
527 
528  frame_size = bytestream2_get_le32(&g2);
529  bytestream2_skip(&g2, 2); /* skip the magic number */
530  num_chunks = bytestream2_get_le16(&g2);
531  bytestream2_skip(&g2, 8); /* skip padding */
532  if (frame_size > buf_size)
533  frame_size = buf_size;
534 
535  if (frame_size < 16)
536  return AVERROR_INVALIDDATA;
537  frame_size -= 16;
538 
539  /* iterate through the chunks */
540  while ((frame_size > 0) && (num_chunks > 0) &&
541  bytestream2_get_bytes_left(&g2) >= 4) {
542  int stream_ptr_after_chunk;
543  chunk_size = bytestream2_get_le32(&g2);
544  if (chunk_size > frame_size) {
545  av_log(avctx, AV_LOG_WARNING,
546  "Invalid chunk_size = %u > frame_size = %u\n", chunk_size, frame_size);
547  chunk_size = frame_size;
548  }
549  stream_ptr_after_chunk = bytestream2_tell(&g2) - 4 + chunk_size;
550 
551  chunk_type = bytestream2_get_le16(&g2);
552 
553 
554  switch (chunk_type) {
555  case FLI_256_COLOR:
556  case FLI_COLOR:
557  /* For some reason, it seems that non-palettized flics do
558  * include one of these chunks in their first frame.
559  * Why I do not know, it seems rather extraneous. */
560  ff_dlog(avctx,
561  "Unexpected Palette chunk %d in non-palettized FLC\n",
562  chunk_type);
563  bytestream2_skip(&g2, chunk_size - 6);
564  break;
565 
566  case FLI_DELTA:
567  case FLI_DTA_LC:
568  y_ptr = 0;
569  compressed_lines = bytestream2_get_le16(&g2);
570  while (compressed_lines > 0) {
571  if (bytestream2_tell(&g2) + 2 > stream_ptr_after_chunk)
572  break;
573  if (y_ptr > pixel_limit)
574  return AVERROR_INVALIDDATA;
575  line_packets = bytestream2_get_le16(&g2);
576  if (line_packets < 0) {
577  line_packets = -line_packets;
578  if (line_packets > s->avctx->height)
579  return AVERROR_INVALIDDATA;
580  y_ptr += line_packets * s->frame->linesize[0];
581  } else {
582  compressed_lines--;
583  pixel_ptr = y_ptr;
584  CHECK_PIXEL_PTR(0);
585  pixel_countdown = s->avctx->width;
586  for (i = 0; i < line_packets; i++) {
587  /* account for the skip bytes */
588  if (bytestream2_tell(&g2) + 2 > stream_ptr_after_chunk)
589  break;
590  pixel_skip = bytestream2_get_byte(&g2);
591  pixel_ptr += (pixel_skip*2); /* Pixel is 2 bytes wide */
592  pixel_countdown -= pixel_skip;
593  byte_run = sign_extend(bytestream2_get_byte(&g2), 8);
594  if (byte_run < 0) {
595  byte_run = -byte_run;
596  pixel = bytestream2_get_le16(&g2);
597  CHECK_PIXEL_PTR(2 * byte_run);
598  for (j = 0; j < byte_run; j++, pixel_countdown -= 2) {
599  *((signed short*)(&pixels[pixel_ptr])) = pixel;
600  pixel_ptr += 2;
601  }
602  } else {
603  if (bytestream2_tell(&g2) + 2*byte_run > stream_ptr_after_chunk)
604  break;
605  CHECK_PIXEL_PTR(2 * byte_run);
606  for (j = 0; j < byte_run; j++, pixel_countdown--) {
607  *((signed short*)(&pixels[pixel_ptr])) = bytestream2_get_le16(&g2);
608  pixel_ptr += 2;
609  }
610  }
611  }
612 
613  y_ptr += s->frame->linesize[0];
614  }
615  }
616  break;
617 
618  case FLI_LC:
619  av_log(avctx, AV_LOG_ERROR, "Unexpected FLI_LC chunk in non-palettized FLC\n");
620  bytestream2_skip(&g2, chunk_size - 6);
621  break;
622 
623  case FLI_BLACK:
624  /* set the whole frame to 0x0000 which is black in both 15Bpp and 16Bpp modes. */
625  memset(pixels, 0x0000,
626  s->frame->linesize[0] * s->avctx->height);
627  break;
628 
629  case FLI_BRUN:
630  y_ptr = 0;
631  for (lines = 0; lines < s->avctx->height; lines++) {
632  pixel_ptr = y_ptr;
633  /* disregard the line packets; instead, iterate through all
634  * pixels on a row */
635  bytestream2_skip(&g2, 1);
636  pixel_countdown = (s->avctx->width * 2);
637 
638  while (pixel_countdown > 0) {
639  if (bytestream2_tell(&g2) + 1 > stream_ptr_after_chunk)
640  break;
641  byte_run = sign_extend(bytestream2_get_byte(&g2), 8);
642  if (byte_run > 0) {
643  palette_idx1 = bytestream2_get_byte(&g2);
644  CHECK_PIXEL_PTR(byte_run);
645  for (j = 0; j < byte_run; j++) {
646  pixels[pixel_ptr++] = palette_idx1;
647  pixel_countdown--;
648  if (pixel_countdown < 0)
649  av_log(avctx, AV_LOG_ERROR, "pixel_countdown < 0 (%d) (linea%d)\n",
650  pixel_countdown, lines);
651  }
652  } else { /* copy bytes if byte_run < 0 */
653  byte_run = -byte_run;
654  if (bytestream2_tell(&g2) + byte_run > stream_ptr_after_chunk)
655  break;
656  CHECK_PIXEL_PTR(byte_run);
657  for (j = 0; j < byte_run; j++) {
658  palette_idx1 = bytestream2_get_byte(&g2);
659  pixels[pixel_ptr++] = palette_idx1;
660  pixel_countdown--;
661  if (pixel_countdown < 0)
662  av_log(avctx, AV_LOG_ERROR, "pixel_countdown < 0 (%d) at line %d\n",
663  pixel_countdown, lines);
664  }
665  }
666  }
667 
668  /* Now FLX is strange, in that it is "byte" as opposed to "pixel" run length compressed.
669  * This does not give us any good opportunity to perform word endian conversion
670  * during decompression. So if it is required (i.e., this is not a LE target, we do
671  * a second pass over the line here, swapping the bytes.
672  */
673 #if HAVE_BIGENDIAN
674  pixel_ptr = y_ptr;
675  pixel_countdown = s->avctx->width;
676  while (pixel_countdown > 0) {
677  *((signed short*)(&pixels[pixel_ptr])) = AV_RL16(&buf[pixel_ptr]);
678  pixel_ptr += 2;
679  }
680 #endif
681  y_ptr += s->frame->linesize[0];
682  }
683  break;
684 
685  case FLI_DTA_BRUN:
686  y_ptr = 0;
687  for (lines = 0; lines < s->avctx->height; lines++) {
688  pixel_ptr = y_ptr;
689  /* disregard the line packets; instead, iterate through all
690  * pixels on a row */
691  bytestream2_skip(&g2, 1);
692  pixel_countdown = s->avctx->width; /* Width is in pixels, not bytes */
693 
694  while (pixel_countdown > 0) {
695  if (bytestream2_tell(&g2) + 1 > stream_ptr_after_chunk)
696  break;
697  byte_run = sign_extend(bytestream2_get_byte(&g2), 8);
698  if (byte_run > 0) {
699  pixel = bytestream2_get_le16(&g2);
700  CHECK_PIXEL_PTR(2 * byte_run);
701  for (j = 0; j < byte_run; j++) {
702  *((signed short*)(&pixels[pixel_ptr])) = pixel;
703  pixel_ptr += 2;
704  pixel_countdown--;
705  if (pixel_countdown < 0)
706  av_log(avctx, AV_LOG_ERROR, "pixel_countdown < 0 (%d)\n",
707  pixel_countdown);
708  }
709  } else { /* copy pixels if byte_run < 0 */
710  byte_run = -byte_run;
711  if (bytestream2_tell(&g2) + 2 * byte_run > stream_ptr_after_chunk)
712  break;
713  CHECK_PIXEL_PTR(2 * byte_run);
714  for (j = 0; j < byte_run; j++) {
715  *((signed short*)(&pixels[pixel_ptr])) = bytestream2_get_le16(&g2);
716  pixel_ptr += 2;
717  pixel_countdown--;
718  if (pixel_countdown < 0)
719  av_log(avctx, AV_LOG_ERROR, "pixel_countdown < 0 (%d)\n",
720  pixel_countdown);
721  }
722  }
723  }
724 
725  y_ptr += s->frame->linesize[0];
726  }
727  break;
728 
729  case FLI_COPY:
730  case FLI_DTA_COPY:
731  /* copy the chunk (uncompressed frame) */
732  if (chunk_size - 6 > (unsigned int)(FFALIGN(s->avctx->width, 2) * s->avctx->height)*2) {
733  av_log(avctx, AV_LOG_ERROR, "In chunk FLI_COPY : source data (%d bytes) " \
734  "bigger than image, skipping chunk\n", chunk_size - 6);
735  bytestream2_skip(&g2, chunk_size - 6);
736  } else {
737 
738  for (y_ptr = 0; y_ptr < s->frame->linesize[0] * s->avctx->height;
739  y_ptr += s->frame->linesize[0]) {
740 
741  pixel_countdown = s->avctx->width;
742  pixel_ptr = 0;
743  while (pixel_countdown > 0) {
744  *((signed short*)(&pixels[y_ptr + pixel_ptr])) = bytestream2_get_le16(&g2);
745  pixel_ptr += 2;
746  pixel_countdown--;
747  }
748  if (s->avctx->width & 1)
749  bytestream2_skip(&g2, 2);
750  }
751  }
752  break;
753 
754  case FLI_MINI:
755  /* some sort of a thumbnail? disregard this chunk... */
756  bytestream2_skip(&g2, chunk_size - 6);
757  break;
758 
759  default:
760  av_log(avctx, AV_LOG_ERROR, "Unrecognized chunk type: %d\n", chunk_type);
761  break;
762  }
763 
764  if (stream_ptr_after_chunk - bytestream2_tell(&g2) >= 0) {
765  bytestream2_skip(&g2, stream_ptr_after_chunk - bytestream2_tell(&g2));
766  } else {
767  av_log(avctx, AV_LOG_ERROR, "Chunk overread\n");
768  break;
769  }
770 
771  frame_size -= chunk_size;
772  num_chunks--;
773  }
774 
775  /* by the end of the chunk, the stream ptr should equal the frame
776  * size (minus 1, possibly); if it doesn't, issue a warning */
777  if ((bytestream2_get_bytes_left(&g2) != 0) && (bytestream2_get_bytes_left(&g2) != 1))
778  av_log(avctx, AV_LOG_ERROR, "Processed FLI chunk where chunk size = %d " \
779  "and final chunk ptr = %d\n", buf_size, bytestream2_tell(&g2));
780 
781  if ((ret = av_frame_ref(data, s->frame)) < 0)
782  return ret;
783 
784  *got_frame = 1;
785 
786  return buf_size;
787 }
788 
790  void *data, int *got_frame,
791  const uint8_t *buf, int buf_size)
792 {
793  FlicDecodeContext *s = avctx->priv_data;
794 
795  GetByteContext g2;
796  int pixel_ptr;
797  unsigned char palette_idx1;
798 
799  unsigned int frame_size;
800  int num_chunks;
801 
802  unsigned int chunk_size;
803  int chunk_type;
804 
805  int i, j, ret;
806 
807  int lines;
808  int compressed_lines;
809  signed short line_packets;
810  int y_ptr;
811  int byte_run;
812  int pixel_skip;
813  int pixel_countdown;
814  unsigned char *pixels;
815  int pixel;
816  unsigned int pixel_limit;
817 
818  bytestream2_init(&g2, buf, buf_size);
819 
820  if ((ret = ff_reget_buffer(avctx, s->frame)) < 0)
821  return ret;
822 
823  pixels = s->frame->data[0];
824  pixel_limit = s->avctx->height * s->frame->linesize[0];
825 
826  frame_size = bytestream2_get_le32(&g2);
827  bytestream2_skip(&g2, 2); /* skip the magic number */
828  num_chunks = bytestream2_get_le16(&g2);
829  bytestream2_skip(&g2, 8); /* skip padding */
830  if (frame_size > buf_size)
831  frame_size = buf_size;
832 
833  if (frame_size < 16)
834  return AVERROR_INVALIDDATA;
835  frame_size -= 16;
836 
837  /* iterate through the chunks */
838  while ((frame_size > 0) && (num_chunks > 0) &&
839  bytestream2_get_bytes_left(&g2) >= 4) {
840  int stream_ptr_after_chunk;
841  chunk_size = bytestream2_get_le32(&g2);
842  if (chunk_size > frame_size) {
843  av_log(avctx, AV_LOG_WARNING,
844  "Invalid chunk_size = %u > frame_size = %u\n", chunk_size, frame_size);
845  chunk_size = frame_size;
846  }
847  stream_ptr_after_chunk = bytestream2_tell(&g2) - 4 + chunk_size;
848 
849  chunk_type = bytestream2_get_le16(&g2);
850 
851 
852  switch (chunk_type) {
853  case FLI_256_COLOR:
854  case FLI_COLOR:
855  /* For some reason, it seems that non-palettized flics do
856  * include one of these chunks in their first frame.
857  * Why I do not know, it seems rather extraneous. */
858  ff_dlog(avctx,
859  "Unexpected Palette chunk %d in non-palettized FLC\n",
860  chunk_type);
861  bytestream2_skip(&g2, chunk_size - 6);
862  break;
863 
864  case FLI_DELTA:
865  case FLI_DTA_LC:
866  y_ptr = 0;
867  compressed_lines = bytestream2_get_le16(&g2);
868  while (compressed_lines > 0) {
869  if (bytestream2_tell(&g2) + 2 > stream_ptr_after_chunk)
870  break;
871  if (y_ptr > pixel_limit)
872  return AVERROR_INVALIDDATA;
873  line_packets = bytestream2_get_le16(&g2);
874  if (line_packets < 0) {
875  line_packets = -line_packets;
876  if (line_packets > s->avctx->height)
877  return AVERROR_INVALIDDATA;
878  y_ptr += line_packets * s->frame->linesize[0];
879  } else {
880  compressed_lines--;
881  pixel_ptr = y_ptr;
882  CHECK_PIXEL_PTR(0);
883  pixel_countdown = s->avctx->width;
884  for (i = 0; i < line_packets; i++) {
885  /* account for the skip bytes */
886  if (bytestream2_tell(&g2) + 2 > stream_ptr_after_chunk)
887  break;
888  pixel_skip = bytestream2_get_byte(&g2);
889  pixel_ptr += (pixel_skip*3); /* Pixel is 3 bytes wide */
890  pixel_countdown -= pixel_skip;
891  byte_run = sign_extend(bytestream2_get_byte(&g2), 8);
892  if (byte_run < 0) {
893  byte_run = -byte_run;
894  pixel = bytestream2_get_le24(&g2);
895  CHECK_PIXEL_PTR(3 * byte_run);
896  for (j = 0; j < byte_run; j++, pixel_countdown -= 1) {
897  AV_WL24(&pixels[pixel_ptr], pixel);
898  pixel_ptr += 3;
899  }
900  } else {
901  if (bytestream2_tell(&g2) + 2*byte_run > stream_ptr_after_chunk)
902  break;
903  CHECK_PIXEL_PTR(2 * byte_run);
904  for (j = 0; j < byte_run; j++, pixel_countdown--) {
905  pixel = bytestream2_get_le24(&g2);
906  AV_WL24(&pixels[pixel_ptr], pixel);
907  pixel_ptr += 3;
908  }
909  }
910  }
911 
912  y_ptr += s->frame->linesize[0];
913  }
914  }
915  break;
916 
917  case FLI_LC:
918  av_log(avctx, AV_LOG_ERROR, "Unexpected FLI_LC chunk in non-palettized FLC\n");
919  bytestream2_skip(&g2, chunk_size - 6);
920  break;
921 
922  case FLI_BLACK:
923  /* set the whole frame to 0x00 which is black for 24 bit mode. */
924  memset(pixels, 0x00,
925  s->frame->linesize[0] * s->avctx->height);
926  break;
927 
928  case FLI_BRUN:
929  y_ptr = 0;
930  for (lines = 0; lines < s->avctx->height; lines++) {
931  pixel_ptr = y_ptr;
932  /* disregard the line packets; instead, iterate through all
933  * pixels on a row */
934  bytestream2_skip(&g2, 1);
935  pixel_countdown = (s->avctx->width * 3);
936 
937  while (pixel_countdown > 0) {
938  if (bytestream2_tell(&g2) + 1 > stream_ptr_after_chunk)
939  break;
940  byte_run = sign_extend(bytestream2_get_byte(&g2), 8);
941  if (byte_run > 0) {
942  palette_idx1 = bytestream2_get_byte(&g2);
943  CHECK_PIXEL_PTR(byte_run);
944  for (j = 0; j < byte_run; j++) {
945  pixels[pixel_ptr++] = palette_idx1;
946  pixel_countdown--;
947  if (pixel_countdown < 0)
948  av_log(avctx, AV_LOG_ERROR, "pixel_countdown < 0 (%d) (linea%d)\n",
949  pixel_countdown, lines);
950  }
951  } else { /* copy bytes if byte_run < 0 */
952  byte_run = -byte_run;
953  if (bytestream2_tell(&g2) + byte_run > stream_ptr_after_chunk)
954  break;
955  CHECK_PIXEL_PTR(byte_run);
956  for (j = 0; j < byte_run; j++) {
957  palette_idx1 = bytestream2_get_byte(&g2);
958  pixels[pixel_ptr++] = palette_idx1;
959  pixel_countdown--;
960  if (pixel_countdown < 0)
961  av_log(avctx, AV_LOG_ERROR, "pixel_countdown < 0 (%d) at line %d\n",
962  pixel_countdown, lines);
963  }
964  }
965  }
966 
967  y_ptr += s->frame->linesize[0];
968  }
969  break;
970 
971  case FLI_DTA_BRUN:
972  y_ptr = 0;
973  for (lines = 0; lines < s->avctx->height; lines++) {
974  pixel_ptr = y_ptr;
975  /* disregard the line packets; instead, iterate through all
976  * pixels on a row */
977  bytestream2_skip(&g2, 1);
978  pixel_countdown = s->avctx->width; /* Width is in pixels, not bytes */
979 
980  while (pixel_countdown > 0) {
981  if (bytestream2_tell(&g2) + 1 > stream_ptr_after_chunk)
982  break;
983  byte_run = sign_extend(bytestream2_get_byte(&g2), 8);
984  if (byte_run > 0) {
985  pixel = bytestream2_get_le24(&g2);
986  CHECK_PIXEL_PTR(3 * byte_run);
987  for (j = 0; j < byte_run; j++) {
988  AV_WL24(pixels + pixel_ptr, pixel);
989  pixel_ptr += 3;
990  pixel_countdown--;
991  if (pixel_countdown < 0)
992  av_log(avctx, AV_LOG_ERROR, "pixel_countdown < 0 (%d)\n",
993  pixel_countdown);
994  }
995  } else { /* copy pixels if byte_run < 0 */
996  byte_run = -byte_run;
997  if (bytestream2_tell(&g2) + 3 * byte_run > stream_ptr_after_chunk)
998  break;
999  CHECK_PIXEL_PTR(3 * byte_run);
1000  for (j = 0; j < byte_run; j++) {
1001  pixel = bytestream2_get_le24(&g2);
1002  AV_WL24(pixels + pixel_ptr, pixel);
1003  pixel_ptr += 3;
1004  pixel_countdown--;
1005  if (pixel_countdown < 0)
1006  av_log(avctx, AV_LOG_ERROR, "pixel_countdown < 0 (%d)\n",
1007  pixel_countdown);
1008  }
1009  }
1010  }
1011 
1012  y_ptr += s->frame->linesize[0];
1013  }
1014  break;
1015 
1016  case FLI_COPY:
1017  case FLI_DTA_COPY:
1018  /* copy the chunk (uncompressed frame) */
1019  if (chunk_size - 6 > (unsigned int)(FFALIGN(s->avctx->width, 2) * s->avctx->height)*3) {
1020  av_log(avctx, AV_LOG_ERROR, "In chunk FLI_COPY : source data (%d bytes) " \
1021  "bigger than image, skipping chunk\n", chunk_size - 6);
1022  bytestream2_skip(&g2, chunk_size - 6);
1023  } else {
1024  for (y_ptr = 0; y_ptr < s->frame->linesize[0] * s->avctx->height;
1025  y_ptr += s->frame->linesize[0]) {
1026 
1027  pixel_countdown = s->avctx->width;
1028  pixel_ptr = 0;
1029  while (pixel_countdown > 0) {
1030  pixel = bytestream2_get_le24(&g2);
1031  AV_WL24(&pixels[y_ptr + pixel_ptr], pixel);
1032  pixel_ptr += 3;
1033  pixel_countdown--;
1034  }
1035  if (s->avctx->width & 1)
1036  bytestream2_skip(&g2, 3);
1037  }
1038  }
1039  break;
1040 
1041  case FLI_MINI:
1042  /* some sort of a thumbnail? disregard this chunk... */
1043  bytestream2_skip(&g2, chunk_size - 6);
1044  break;
1045 
1046  default:
1047  av_log(avctx, AV_LOG_ERROR, "Unrecognized chunk type: %d\n", chunk_type);
1048  break;
1049  }
1050 
1051  if (stream_ptr_after_chunk - bytestream2_tell(&g2) >= 0) {
1052  bytestream2_skip(&g2, stream_ptr_after_chunk - bytestream2_tell(&g2));
1053  } else {
1054  av_log(avctx, AV_LOG_ERROR, "Chunk overread\n");
1055  break;
1056  }
1057 
1058  frame_size -= chunk_size;
1059  num_chunks--;
1060  }
1061 
1062  /* by the end of the chunk, the stream ptr should equal the frame
1063  * size (minus 1, possibly); if it doesn't, issue a warning */
1064  if ((bytestream2_get_bytes_left(&g2) != 0) && (bytestream2_get_bytes_left(&g2) != 1))
1065  av_log(avctx, AV_LOG_ERROR, "Processed FLI chunk where chunk size = %d " \
1066  "and final chunk ptr = %d\n", buf_size, bytestream2_tell(&g2));
1067 
1068  if ((ret = av_frame_ref(data, s->frame)) < 0)
1069  return ret;
1070 
1071  *got_frame = 1;
1072 
1073  return buf_size;
1074 }
1075 
1077  void *data, int *got_frame,
1078  AVPacket *avpkt)
1079 {
1080  const uint8_t *buf = avpkt->data;
1081  int buf_size = avpkt->size;
1082  if (avctx->pix_fmt == AV_PIX_FMT_PAL8) {
1083  return flic_decode_frame_8BPP(avctx, data, got_frame,
1084  buf, buf_size);
1085  } else if ((avctx->pix_fmt == AV_PIX_FMT_RGB555) ||
1086  (avctx->pix_fmt == AV_PIX_FMT_RGB565)) {
1087  return flic_decode_frame_15_16BPP(avctx, data, got_frame,
1088  buf, buf_size);
1089  } else if (avctx->pix_fmt == AV_PIX_FMT_BGR24) {
1090  return flic_decode_frame_24BPP(avctx, data, got_frame,
1091  buf, buf_size);
1092  }
1093 
1094  /* Should not get here, ever as the pix_fmt is processed */
1095  /* in flic_decode_init and the above if should deal with */
1096  /* the finite set of possibilities allowable by here. */
1097  /* But in case we do, just error out. */
1098  av_log(avctx, AV_LOG_ERROR, "Unknown FLC format, my science cannot explain how this happened.\n");
1099  return AVERROR_BUG;
1100 }
1101 
1102 
1104 {
1105  FlicDecodeContext *s = avctx->priv_data;
1106 
1107  av_frame_free(&s->frame);
1108 
1109  return 0;
1110 }
1111 
1113  .name = "flic",
1114  .long_name = NULL_IF_CONFIG_SMALL("Autodesk Animator Flic video"),
1115  .type = AVMEDIA_TYPE_VIDEO,
1116  .id = AV_CODEC_ID_FLIC,
1117  .priv_data_size = sizeof(FlicDecodeContext),
1119  .close = flic_decode_end,
1121  .capabilities = AV_CODEC_CAP_DR1,
1122 };
#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:201
#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:1673
const char * b
Definition: vf_curves.c:113
enum AVPixelFormat pix_fmt
Pixel format, see AV_PIX_FMT_xxx.
Definition: avcodec.h:1982
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:489
AVCodec.
Definition: avcodec.h:3730
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 void decode(AVCodecContext *dec_ctx, AVPacket *pkt, AVFrame *frame, FILE *outfile)
Definition: decode_audio.c:42
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: decode.c:1712
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:392
uint8_t * extradata
some codecs need / can use extradata like Huffman tables.
Definition: avcodec.h:1869
uint8_t * data
Definition: avcodec.h:1672
#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:789
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:179
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:3737
#define FLI_DTA_BRUN
Definition: flicvideo.c:55
int width
picture width / height.
Definition: avcodec.h:1941
#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:1872
Libavcodec external API header.
int linesize[AV_NUM_DATA_POINTERS]
For video, size in bytes of each picture line.
Definition: frame.h:232
main external API structure.
Definition: avcodec.h:1754
void * buf
Definition: avisynth_c.h:690
#define FLI_DTA_LC
Definition: flicvideo.c:57
int extradata_size
Definition: avcodec.h:1870
#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:1076
static av_cold int flic_decode_end(AVCodecContext *avctx)
Definition: flicvideo.c:1103
int palette_has_changed
Tell user application that palette has changed from previous frame.
Definition: frame.h:358
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:215
#define FLI_BLACK
Definition: flicvideo.c:51
common internal api header.
if(ret< 0)
Definition: vf_mcdeint.c:279
#define AV_PIX_FMT_RGB555
Definition: pixfmt.h:367
#define AV_INPUT_BUFFER_PADDING_SIZE
Required number of additionally allocated bytes at the end of the input bitstream for decoding...
Definition: avcodec.h:777
void * priv_data
Definition: avcodec.h:1796
int pixels
Definition: avisynth_c.h:429
unsigned int palette[256]
Definition: flicvideo.c:75
AVCodec ff_flic_decoder
Definition: flicvideo.c:1112
#define AV_PIX_FMT_RGB565
Definition: pixfmt.h:366
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_RL32
Definition: bytestream.h:87
This structure stores compressed data.
Definition: avcodec.h:1649
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:1002