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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  line_packets = bytestream2_get_le16(&g2);
276  if ((line_packets & 0xC000) == 0xC000) {
277  // line skip opcode
278  line_packets = -line_packets;
279  y_ptr += line_packets * s->frame->linesize[0];
280  } else if ((line_packets & 0xC000) == 0x4000) {
281  av_log(avctx, AV_LOG_ERROR, "Undefined opcode (%x) in DELTA_FLI\n", line_packets);
282  } else if ((line_packets & 0xC000) == 0x8000) {
283  // "last byte" opcode
284  pixel_ptr= y_ptr + s->frame->linesize[0] - 1;
285  CHECK_PIXEL_PTR(0);
286  pixels[pixel_ptr] = line_packets & 0xff;
287  } else {
288  compressed_lines--;
289  pixel_ptr = y_ptr;
290  CHECK_PIXEL_PTR(0);
291  pixel_countdown = s->avctx->width;
292  for (i = 0; i < line_packets; i++) {
293  if (bytestream2_tell(&g2) + 2 > stream_ptr_after_chunk)
294  break;
295  /* account for the skip bytes */
296  pixel_skip = bytestream2_get_byte(&g2);
297  pixel_ptr += pixel_skip;
298  pixel_countdown -= pixel_skip;
299  byte_run = sign_extend(bytestream2_get_byte(&g2), 8);
300  if (byte_run < 0) {
301  byte_run = -byte_run;
302  palette_idx1 = bytestream2_get_byte(&g2);
303  palette_idx2 = bytestream2_get_byte(&g2);
304  CHECK_PIXEL_PTR(byte_run * 2);
305  for (j = 0; j < byte_run; j++, pixel_countdown -= 2) {
306  pixels[pixel_ptr++] = palette_idx1;
307  pixels[pixel_ptr++] = palette_idx2;
308  }
309  } else {
310  CHECK_PIXEL_PTR(byte_run * 2);
311  if (bytestream2_tell(&g2) + byte_run * 2 > stream_ptr_after_chunk)
312  break;
313  for (j = 0; j < byte_run * 2; j++, pixel_countdown--) {
314  pixels[pixel_ptr++] = bytestream2_get_byte(&g2);
315  }
316  }
317  }
318 
319  y_ptr += s->frame->linesize[0];
320  }
321  }
322  break;
323 
324  case FLI_LC:
325  /* line compressed */
326  starting_line = bytestream2_get_le16(&g2);
327  y_ptr = 0;
328  y_ptr += starting_line * s->frame->linesize[0];
329 
330  compressed_lines = bytestream2_get_le16(&g2);
331  while (compressed_lines > 0) {
332  pixel_ptr = y_ptr;
333  CHECK_PIXEL_PTR(0);
334  pixel_countdown = s->avctx->width;
335  if (bytestream2_tell(&g2) + 1 > stream_ptr_after_chunk)
336  break;
337  line_packets = bytestream2_get_byte(&g2);
338  if (line_packets > 0) {
339  for (i = 0; i < line_packets; i++) {
340  /* account for the skip bytes */
341  if (bytestream2_tell(&g2) + 1 > stream_ptr_after_chunk)
342  break;
343  pixel_skip = bytestream2_get_byte(&g2);
344  pixel_ptr += pixel_skip;
345  pixel_countdown -= pixel_skip;
346  byte_run = sign_extend(bytestream2_get_byte(&g2),8);
347  if (byte_run > 0) {
348  CHECK_PIXEL_PTR(byte_run);
349  if (bytestream2_tell(&g2) + byte_run > stream_ptr_after_chunk)
350  break;
351  for (j = 0; j < byte_run; j++, pixel_countdown--) {
352  pixels[pixel_ptr++] = bytestream2_get_byte(&g2);
353  }
354  } else if (byte_run < 0) {
355  byte_run = -byte_run;
356  palette_idx1 = bytestream2_get_byte(&g2);
357  CHECK_PIXEL_PTR(byte_run);
358  for (j = 0; j < byte_run; j++, pixel_countdown--) {
359  pixels[pixel_ptr++] = palette_idx1;
360  }
361  }
362  }
363  }
364 
365  y_ptr += s->frame->linesize[0];
366  compressed_lines--;
367  }
368  break;
369 
370  case FLI_BLACK:
371  /* set the whole frame to color 0 (which is usually black) */
372  memset(pixels, 0,
373  s->frame->linesize[0] * s->avctx->height);
374  break;
375 
376  case FLI_BRUN:
377  /* Byte run compression: This chunk type only occurs in the first
378  * FLI frame and it will update the entire frame. */
379  y_ptr = 0;
380  for (lines = 0; lines < s->avctx->height; lines++) {
381  pixel_ptr = y_ptr;
382  /* disregard the line packets; instead, iterate through all
383  * pixels on a row */
384  bytestream2_skip(&g2, 1);
385  pixel_countdown = s->avctx->width;
386  while (pixel_countdown > 0) {
387  if (bytestream2_tell(&g2) + 1 > stream_ptr_after_chunk)
388  break;
389  byte_run = sign_extend(bytestream2_get_byte(&g2), 8);
390  if (!byte_run) {
391  av_log(avctx, AV_LOG_ERROR, "Invalid byte run value.\n");
392  return AVERROR_INVALIDDATA;
393  }
394 
395  if (byte_run > 0) {
396  palette_idx1 = bytestream2_get_byte(&g2);
397  CHECK_PIXEL_PTR(byte_run);
398  for (j = 0; j < byte_run; j++) {
399  pixels[pixel_ptr++] = palette_idx1;
400  pixel_countdown--;
401  if (pixel_countdown < 0)
402  av_log(avctx, AV_LOG_ERROR, "pixel_countdown < 0 (%d) at line %d\n",
403  pixel_countdown, lines);
404  }
405  } else { /* copy bytes if byte_run < 0 */
406  byte_run = -byte_run;
407  CHECK_PIXEL_PTR(byte_run);
408  if (bytestream2_tell(&g2) + byte_run > stream_ptr_after_chunk)
409  break;
410  for (j = 0; j < byte_run; j++) {
411  pixels[pixel_ptr++] = bytestream2_get_byte(&g2);
412  pixel_countdown--;
413  if (pixel_countdown < 0)
414  av_log(avctx, AV_LOG_ERROR, "pixel_countdown < 0 (%d) at line %d\n",
415  pixel_countdown, lines);
416  }
417  }
418  }
419 
420  y_ptr += s->frame->linesize[0];
421  }
422  break;
423 
424  case FLI_COPY:
425  /* copy the chunk (uncompressed frame) */
426  if (chunk_size - 6 != FFALIGN(s->avctx->width, 4) * s->avctx->height) {
427  av_log(avctx, AV_LOG_ERROR, "In chunk FLI_COPY : source data (%d bytes) " \
428  "has incorrect size, skipping chunk\n", chunk_size - 6);
429  bytestream2_skip(&g2, chunk_size - 6);
430  } else {
431  for (y_ptr = 0; y_ptr < s->frame->linesize[0] * s->avctx->height;
432  y_ptr += s->frame->linesize[0]) {
433  bytestream2_get_buffer(&g2, &pixels[y_ptr],
434  s->avctx->width);
435  if (s->avctx->width & 3)
436  bytestream2_skip(&g2, 4 - (s->avctx->width & 3));
437  }
438  }
439  break;
440 
441  case FLI_MINI:
442  /* some sort of a thumbnail? disregard this chunk... */
443  break;
444 
445  default:
446  av_log(avctx, AV_LOG_ERROR, "Unrecognized chunk type: %d\n", chunk_type);
447  break;
448  }
449 
450  if (stream_ptr_after_chunk - bytestream2_tell(&g2) >= 0) {
451  bytestream2_skip(&g2, stream_ptr_after_chunk - bytestream2_tell(&g2));
452  } else {
453  av_log(avctx, AV_LOG_ERROR, "Chunk overread\n");
454  break;
455  }
456 
457  frame_size -= chunk_size;
458  num_chunks--;
459  }
460 
461  /* by the end of the chunk, the stream ptr should equal the frame
462  * size (minus 1 or 2, possibly); if it doesn't, issue a warning */
463  if (bytestream2_get_bytes_left(&g2) > 2)
464  av_log(avctx, AV_LOG_ERROR, "Processed FLI chunk where chunk size = %d " \
465  "and final chunk ptr = %d\n", buf_size,
466  buf_size - bytestream2_get_bytes_left(&g2));
467 
468  /* make the palette available on the way out */
469  memcpy(s->frame->data[1], s->palette, AVPALETTE_SIZE);
470  if (s->new_palette) {
471  s->frame->palette_has_changed = 1;
472  s->new_palette = 0;
473  }
474 
475  if ((ret = av_frame_ref(data, s->frame)) < 0)
476  return ret;
477 
478  *got_frame = 1;
479 
480  return buf_size;
481 }
482 
484  void *data, int *got_frame,
485  const uint8_t *buf, int buf_size)
486 {
487  /* Note, the only difference between the 15Bpp and 16Bpp */
488  /* Format is the pixel format, the packets are processed the same. */
489  FlicDecodeContext *s = avctx->priv_data;
490 
491  GetByteContext g2;
492  int pixel_ptr;
493  unsigned char palette_idx1;
494 
495  unsigned int frame_size;
496  int num_chunks;
497 
498  unsigned int chunk_size;
499  int chunk_type;
500 
501  int i, j, ret;
502 
503  int lines;
504  int compressed_lines;
505  signed short line_packets;
506  int y_ptr;
507  int byte_run;
508  int pixel_skip;
509  int pixel_countdown;
510  unsigned char *pixels;
511  int pixel;
512  unsigned int pixel_limit;
513 
514  bytestream2_init(&g2, buf, buf_size);
515 
516  if ((ret = ff_reget_buffer(avctx, s->frame)) < 0)
517  return ret;
518 
519  pixels = s->frame->data[0];
520  pixel_limit = s->avctx->height * s->frame->linesize[0];
521 
522  frame_size = bytestream2_get_le32(&g2);
523  bytestream2_skip(&g2, 2); /* skip the magic number */
524  num_chunks = bytestream2_get_le16(&g2);
525  bytestream2_skip(&g2, 8); /* skip padding */
526  if (frame_size > buf_size)
527  frame_size = buf_size;
528 
529  if (frame_size < 16)
530  return AVERROR_INVALIDDATA;
531  frame_size -= 16;
532 
533  /* iterate through the chunks */
534  while ((frame_size > 0) && (num_chunks > 0) &&
535  bytestream2_get_bytes_left(&g2) >= 4) {
536  int stream_ptr_after_chunk;
537  chunk_size = bytestream2_get_le32(&g2);
538  if (chunk_size > frame_size) {
539  av_log(avctx, AV_LOG_WARNING,
540  "Invalid chunk_size = %u > frame_size = %u\n", chunk_size, frame_size);
541  chunk_size = frame_size;
542  }
543  stream_ptr_after_chunk = bytestream2_tell(&g2) - 4 + chunk_size;
544 
545  chunk_type = bytestream2_get_le16(&g2);
546 
547 
548  switch (chunk_type) {
549  case FLI_256_COLOR:
550  case FLI_COLOR:
551  /* For some reason, it seems that non-palettized flics do
552  * include one of these chunks in their first frame.
553  * Why I do not know, it seems rather extraneous. */
554  ff_dlog(avctx,
555  "Unexpected Palette chunk %d in non-palettized FLC\n",
556  chunk_type);
557  bytestream2_skip(&g2, chunk_size - 6);
558  break;
559 
560  case FLI_DELTA:
561  case FLI_DTA_LC:
562  y_ptr = 0;
563  compressed_lines = bytestream2_get_le16(&g2);
564  while (compressed_lines > 0) {
565  if (bytestream2_tell(&g2) + 2 > stream_ptr_after_chunk)
566  break;
567  line_packets = bytestream2_get_le16(&g2);
568  if (line_packets < 0) {
569  line_packets = -line_packets;
570  y_ptr += line_packets * s->frame->linesize[0];
571  } else {
572  compressed_lines--;
573  pixel_ptr = y_ptr;
574  CHECK_PIXEL_PTR(0);
575  pixel_countdown = s->avctx->width;
576  for (i = 0; i < line_packets; i++) {
577  /* account for the skip bytes */
578  if (bytestream2_tell(&g2) + 2 > stream_ptr_after_chunk)
579  break;
580  pixel_skip = bytestream2_get_byte(&g2);
581  pixel_ptr += (pixel_skip*2); /* Pixel is 2 bytes wide */
582  pixel_countdown -= pixel_skip;
583  byte_run = sign_extend(bytestream2_get_byte(&g2), 8);
584  if (byte_run < 0) {
585  byte_run = -byte_run;
586  pixel = bytestream2_get_le16(&g2);
587  CHECK_PIXEL_PTR(2 * byte_run);
588  for (j = 0; j < byte_run; j++, pixel_countdown -= 2) {
589  *((signed short*)(&pixels[pixel_ptr])) = pixel;
590  pixel_ptr += 2;
591  }
592  } else {
593  if (bytestream2_tell(&g2) + 2*byte_run > stream_ptr_after_chunk)
594  break;
595  CHECK_PIXEL_PTR(2 * byte_run);
596  for (j = 0; j < byte_run; j++, pixel_countdown--) {
597  *((signed short*)(&pixels[pixel_ptr])) = bytestream2_get_le16(&g2);
598  pixel_ptr += 2;
599  }
600  }
601  }
602 
603  y_ptr += s->frame->linesize[0];
604  }
605  }
606  break;
607 
608  case FLI_LC:
609  av_log(avctx, AV_LOG_ERROR, "Unexpected FLI_LC chunk in non-palettized FLC\n");
610  bytestream2_skip(&g2, chunk_size - 6);
611  break;
612 
613  case FLI_BLACK:
614  /* set the whole frame to 0x0000 which is black in both 15Bpp and 16Bpp modes. */
615  memset(pixels, 0x0000,
616  s->frame->linesize[0] * s->avctx->height);
617  break;
618 
619  case FLI_BRUN:
620  y_ptr = 0;
621  for (lines = 0; lines < s->avctx->height; lines++) {
622  pixel_ptr = y_ptr;
623  /* disregard the line packets; instead, iterate through all
624  * pixels on a row */
625  bytestream2_skip(&g2, 1);
626  pixel_countdown = (s->avctx->width * 2);
627 
628  while (pixel_countdown > 0) {
629  if (bytestream2_tell(&g2) + 1 > stream_ptr_after_chunk)
630  break;
631  byte_run = sign_extend(bytestream2_get_byte(&g2), 8);
632  if (byte_run > 0) {
633  palette_idx1 = bytestream2_get_byte(&g2);
634  CHECK_PIXEL_PTR(byte_run);
635  for (j = 0; j < byte_run; j++) {
636  pixels[pixel_ptr++] = palette_idx1;
637  pixel_countdown--;
638  if (pixel_countdown < 0)
639  av_log(avctx, AV_LOG_ERROR, "pixel_countdown < 0 (%d) (linea%d)\n",
640  pixel_countdown, lines);
641  }
642  } else { /* copy bytes if byte_run < 0 */
643  byte_run = -byte_run;
644  if (bytestream2_tell(&g2) + byte_run > stream_ptr_after_chunk)
645  break;
646  CHECK_PIXEL_PTR(byte_run);
647  for (j = 0; j < byte_run; j++) {
648  palette_idx1 = bytestream2_get_byte(&g2);
649  pixels[pixel_ptr++] = palette_idx1;
650  pixel_countdown--;
651  if (pixel_countdown < 0)
652  av_log(avctx, AV_LOG_ERROR, "pixel_countdown < 0 (%d) at line %d\n",
653  pixel_countdown, lines);
654  }
655  }
656  }
657 
658  /* Now FLX is strange, in that it is "byte" as opposed to "pixel" run length compressed.
659  * This does not give us any good opportunity to perform word endian conversion
660  * during decompression. So if it is required (i.e., this is not a LE target, we do
661  * a second pass over the line here, swapping the bytes.
662  */
663 #if HAVE_BIGENDIAN
664  pixel_ptr = y_ptr;
665  pixel_countdown = s->avctx->width;
666  while (pixel_countdown > 0) {
667  *((signed short*)(&pixels[pixel_ptr])) = AV_RL16(&buf[pixel_ptr]);
668  pixel_ptr += 2;
669  }
670 #endif
671  y_ptr += s->frame->linesize[0];
672  }
673  break;
674 
675  case FLI_DTA_BRUN:
676  y_ptr = 0;
677  for (lines = 0; lines < s->avctx->height; lines++) {
678  pixel_ptr = y_ptr;
679  /* disregard the line packets; instead, iterate through all
680  * pixels on a row */
681  bytestream2_skip(&g2, 1);
682  pixel_countdown = s->avctx->width; /* Width is in pixels, not bytes */
683 
684  while (pixel_countdown > 0) {
685  if (bytestream2_tell(&g2) + 1 > stream_ptr_after_chunk)
686  break;
687  byte_run = sign_extend(bytestream2_get_byte(&g2), 8);
688  if (byte_run > 0) {
689  pixel = bytestream2_get_le16(&g2);
690  CHECK_PIXEL_PTR(2 * byte_run);
691  for (j = 0; j < byte_run; j++) {
692  *((signed short*)(&pixels[pixel_ptr])) = pixel;
693  pixel_ptr += 2;
694  pixel_countdown--;
695  if (pixel_countdown < 0)
696  av_log(avctx, AV_LOG_ERROR, "pixel_countdown < 0 (%d)\n",
697  pixel_countdown);
698  }
699  } else { /* copy pixels if byte_run < 0 */
700  byte_run = -byte_run;
701  if (bytestream2_tell(&g2) + 2 * byte_run > stream_ptr_after_chunk)
702  break;
703  CHECK_PIXEL_PTR(2 * byte_run);
704  for (j = 0; j < byte_run; j++) {
705  *((signed short*)(&pixels[pixel_ptr])) = bytestream2_get_le16(&g2);
706  pixel_ptr += 2;
707  pixel_countdown--;
708  if (pixel_countdown < 0)
709  av_log(avctx, AV_LOG_ERROR, "pixel_countdown < 0 (%d)\n",
710  pixel_countdown);
711  }
712  }
713  }
714 
715  y_ptr += s->frame->linesize[0];
716  }
717  break;
718 
719  case FLI_COPY:
720  case FLI_DTA_COPY:
721  /* copy the chunk (uncompressed frame) */
722  if (chunk_size - 6 > (unsigned int)(FFALIGN(s->avctx->width, 2) * s->avctx->height)*2) {
723  av_log(avctx, AV_LOG_ERROR, "In chunk FLI_COPY : source data (%d bytes) " \
724  "bigger than image, skipping chunk\n", chunk_size - 6);
725  bytestream2_skip(&g2, chunk_size - 6);
726  } else {
727 
728  for (y_ptr = 0; y_ptr < s->frame->linesize[0] * s->avctx->height;
729  y_ptr += s->frame->linesize[0]) {
730 
731  pixel_countdown = s->avctx->width;
732  pixel_ptr = 0;
733  while (pixel_countdown > 0) {
734  *((signed short*)(&pixels[y_ptr + pixel_ptr])) = bytestream2_get_le16(&g2);
735  pixel_ptr += 2;
736  pixel_countdown--;
737  }
738  if (s->avctx->width & 1)
739  bytestream2_skip(&g2, 2);
740  }
741  }
742  break;
743 
744  case FLI_MINI:
745  /* some sort of a thumbnail? disregard this chunk... */
746  bytestream2_skip(&g2, chunk_size - 6);
747  break;
748 
749  default:
750  av_log(avctx, AV_LOG_ERROR, "Unrecognized chunk type: %d\n", chunk_type);
751  break;
752  }
753 
754  if (stream_ptr_after_chunk - bytestream2_tell(&g2) >= 0) {
755  bytestream2_skip(&g2, stream_ptr_after_chunk - bytestream2_tell(&g2));
756  } else {
757  av_log(avctx, AV_LOG_ERROR, "Chunk overread\n");
758  break;
759  }
760 
761  frame_size -= chunk_size;
762  num_chunks--;
763  }
764 
765  /* by the end of the chunk, the stream ptr should equal the frame
766  * size (minus 1, possibly); if it doesn't, issue a warning */
767  if ((bytestream2_get_bytes_left(&g2) != 0) && (bytestream2_get_bytes_left(&g2) != 1))
768  av_log(avctx, AV_LOG_ERROR, "Processed FLI chunk where chunk size = %d " \
769  "and final chunk ptr = %d\n", buf_size, bytestream2_tell(&g2));
770 
771  if ((ret = av_frame_ref(data, s->frame)) < 0)
772  return ret;
773 
774  *got_frame = 1;
775 
776  return buf_size;
777 }
778 
780  void *data, int *got_frame,
781  const uint8_t *buf, int buf_size)
782 {
783  FlicDecodeContext *s = avctx->priv_data;
784 
785  GetByteContext g2;
786  int pixel_ptr;
787  unsigned char palette_idx1;
788 
789  unsigned int frame_size;
790  int num_chunks;
791 
792  unsigned int chunk_size;
793  int chunk_type;
794 
795  int i, j, ret;
796 
797  int lines;
798  int compressed_lines;
799  signed short line_packets;
800  int y_ptr;
801  int byte_run;
802  int pixel_skip;
803  int pixel_countdown;
804  unsigned char *pixels;
805  int pixel;
806  unsigned int pixel_limit;
807 
808  bytestream2_init(&g2, buf, buf_size);
809 
810  if ((ret = ff_reget_buffer(avctx, s->frame)) < 0)
811  return ret;
812 
813  pixels = s->frame->data[0];
814  pixel_limit = s->avctx->height * s->frame->linesize[0];
815 
816  frame_size = bytestream2_get_le32(&g2);
817  bytestream2_skip(&g2, 2); /* skip the magic number */
818  num_chunks = bytestream2_get_le16(&g2);
819  bytestream2_skip(&g2, 8); /* skip padding */
820  if (frame_size > buf_size)
821  frame_size = buf_size;
822 
823  if (frame_size < 16)
824  return AVERROR_INVALIDDATA;
825  frame_size -= 16;
826 
827  /* iterate through the chunks */
828  while ((frame_size > 0) && (num_chunks > 0) &&
829  bytestream2_get_bytes_left(&g2) >= 4) {
830  int stream_ptr_after_chunk;
831  chunk_size = bytestream2_get_le32(&g2);
832  if (chunk_size > frame_size) {
833  av_log(avctx, AV_LOG_WARNING,
834  "Invalid chunk_size = %u > frame_size = %u\n", chunk_size, frame_size);
835  chunk_size = frame_size;
836  }
837  stream_ptr_after_chunk = bytestream2_tell(&g2) - 4 + chunk_size;
838 
839  chunk_type = bytestream2_get_le16(&g2);
840 
841 
842  switch (chunk_type) {
843  case FLI_256_COLOR:
844  case FLI_COLOR:
845  /* For some reason, it seems that non-palettized flics do
846  * include one of these chunks in their first frame.
847  * Why I do not know, it seems rather extraneous. */
848  ff_dlog(avctx,
849  "Unexpected Palette chunk %d in non-palettized FLC\n",
850  chunk_type);
851  bytestream2_skip(&g2, chunk_size - 6);
852  break;
853 
854  case FLI_DELTA:
855  case FLI_DTA_LC:
856  y_ptr = 0;
857  compressed_lines = bytestream2_get_le16(&g2);
858  while (compressed_lines > 0) {
859  if (bytestream2_tell(&g2) + 2 > stream_ptr_after_chunk)
860  break;
861  line_packets = bytestream2_get_le16(&g2);
862  if (line_packets < 0) {
863  line_packets = -line_packets;
864  y_ptr += line_packets * s->frame->linesize[0];
865  } else {
866  compressed_lines--;
867  pixel_ptr = y_ptr;
868  CHECK_PIXEL_PTR(0);
869  pixel_countdown = s->avctx->width;
870  for (i = 0; i < line_packets; i++) {
871  /* account for the skip bytes */
872  if (bytestream2_tell(&g2) + 2 > stream_ptr_after_chunk)
873  break;
874  pixel_skip = bytestream2_get_byte(&g2);
875  pixel_ptr += (pixel_skip*3); /* Pixel is 3 bytes wide */
876  pixel_countdown -= pixel_skip;
877  byte_run = sign_extend(bytestream2_get_byte(&g2), 8);
878  if (byte_run < 0) {
879  byte_run = -byte_run;
880  pixel = bytestream2_get_le24(&g2);
881  CHECK_PIXEL_PTR(3 * byte_run);
882  for (j = 0; j < byte_run; j++, pixel_countdown -= 1) {
883  AV_WL24(&pixels[pixel_ptr], pixel);
884  pixel_ptr += 3;
885  }
886  } else {
887  if (bytestream2_tell(&g2) + 2*byte_run > stream_ptr_after_chunk)
888  break;
889  CHECK_PIXEL_PTR(2 * byte_run);
890  for (j = 0; j < byte_run; j++, pixel_countdown--) {
891  pixel = bytestream2_get_le24(&g2);
892  AV_WL24(&pixels[pixel_ptr], pixel);
893  pixel_ptr += 3;
894  }
895  }
896  }
897 
898  y_ptr += s->frame->linesize[0];
899  }
900  }
901  break;
902 
903  case FLI_LC:
904  av_log(avctx, AV_LOG_ERROR, "Unexpected FLI_LC chunk in non-palettized FLC\n");
905  bytestream2_skip(&g2, chunk_size - 6);
906  break;
907 
908  case FLI_BLACK:
909  /* set the whole frame to 0x00 which is black for 24 bit mode. */
910  memset(pixels, 0x00,
911  s->frame->linesize[0] * s->avctx->height);
912  break;
913 
914  case FLI_BRUN:
915  y_ptr = 0;
916  for (lines = 0; lines < s->avctx->height; lines++) {
917  pixel_ptr = y_ptr;
918  /* disregard the line packets; instead, iterate through all
919  * pixels on a row */
920  bytestream2_skip(&g2, 1);
921  pixel_countdown = (s->avctx->width * 3);
922 
923  while (pixel_countdown > 0) {
924  if (bytestream2_tell(&g2) + 1 > stream_ptr_after_chunk)
925  break;
926  byte_run = sign_extend(bytestream2_get_byte(&g2), 8);
927  if (byte_run > 0) {
928  palette_idx1 = bytestream2_get_byte(&g2);
929  CHECK_PIXEL_PTR(byte_run);
930  for (j = 0; j < byte_run; j++) {
931  pixels[pixel_ptr++] = palette_idx1;
932  pixel_countdown--;
933  if (pixel_countdown < 0)
934  av_log(avctx, AV_LOG_ERROR, "pixel_countdown < 0 (%d) (linea%d)\n",
935  pixel_countdown, lines);
936  }
937  } else { /* copy bytes if byte_run < 0 */
938  byte_run = -byte_run;
939  if (bytestream2_tell(&g2) + byte_run > stream_ptr_after_chunk)
940  break;
941  CHECK_PIXEL_PTR(byte_run);
942  for (j = 0; j < byte_run; j++) {
943  palette_idx1 = bytestream2_get_byte(&g2);
944  pixels[pixel_ptr++] = palette_idx1;
945  pixel_countdown--;
946  if (pixel_countdown < 0)
947  av_log(avctx, AV_LOG_ERROR, "pixel_countdown < 0 (%d) at line %d\n",
948  pixel_countdown, lines);
949  }
950  }
951  }
952 
953  y_ptr += s->frame->linesize[0];
954  }
955  break;
956 
957  case FLI_DTA_BRUN:
958  y_ptr = 0;
959  for (lines = 0; lines < s->avctx->height; lines++) {
960  pixel_ptr = y_ptr;
961  /* disregard the line packets; instead, iterate through all
962  * pixels on a row */
963  bytestream2_skip(&g2, 1);
964  pixel_countdown = s->avctx->width; /* Width is in pixels, not bytes */
965 
966  while (pixel_countdown > 0) {
967  if (bytestream2_tell(&g2) + 1 > stream_ptr_after_chunk)
968  break;
969  byte_run = sign_extend(bytestream2_get_byte(&g2), 8);
970  if (byte_run > 0) {
971  pixel = bytestream2_get_le24(&g2);
972  CHECK_PIXEL_PTR(3 * byte_run);
973  for (j = 0; j < byte_run; j++) {
974  AV_WL24(pixels + pixel_ptr, pixel);
975  pixel_ptr += 3;
976  pixel_countdown--;
977  if (pixel_countdown < 0)
978  av_log(avctx, AV_LOG_ERROR, "pixel_countdown < 0 (%d)\n",
979  pixel_countdown);
980  }
981  } else { /* copy pixels if byte_run < 0 */
982  byte_run = -byte_run;
983  if (bytestream2_tell(&g2) + 3 * byte_run > stream_ptr_after_chunk)
984  break;
985  CHECK_PIXEL_PTR(3 * byte_run);
986  for (j = 0; j < byte_run; j++) {
987  pixel = bytestream2_get_le24(&g2);
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  }
996  }
997 
998  y_ptr += s->frame->linesize[0];
999  }
1000  break;
1001 
1002  case FLI_COPY:
1003  case FLI_DTA_COPY:
1004  /* copy the chunk (uncompressed frame) */
1005  if (chunk_size - 6 > (unsigned int)(FFALIGN(s->avctx->width, 2) * s->avctx->height)*3) {
1006  av_log(avctx, AV_LOG_ERROR, "In chunk FLI_COPY : source data (%d bytes) " \
1007  "bigger than image, skipping chunk\n", chunk_size - 6);
1008  bytestream2_skip(&g2, chunk_size - 6);
1009  } else {
1010  for (y_ptr = 0; y_ptr < s->frame->linesize[0] * s->avctx->height;
1011  y_ptr += s->frame->linesize[0]) {
1012 
1013  pixel_countdown = s->avctx->width;
1014  pixel_ptr = 0;
1015  while (pixel_countdown > 0) {
1016  pixel = bytestream2_get_le24(&g2);
1017  AV_WL24(&pixels[y_ptr + pixel_ptr], pixel);
1018  pixel_ptr += 3;
1019  pixel_countdown--;
1020  }
1021  if (s->avctx->width & 1)
1022  bytestream2_skip(&g2, 3);
1023  }
1024  }
1025  break;
1026 
1027  case FLI_MINI:
1028  /* some sort of a thumbnail? disregard this chunk... */
1029  bytestream2_skip(&g2, chunk_size - 6);
1030  break;
1031 
1032  default:
1033  av_log(avctx, AV_LOG_ERROR, "Unrecognized chunk type: %d\n", chunk_type);
1034  break;
1035  }
1036 
1037  if (stream_ptr_after_chunk - bytestream2_tell(&g2) >= 0) {
1038  bytestream2_skip(&g2, stream_ptr_after_chunk - bytestream2_tell(&g2));
1039  } else {
1040  av_log(avctx, AV_LOG_ERROR, "Chunk overread\n");
1041  break;
1042  }
1043 
1044  frame_size -= chunk_size;
1045  num_chunks--;
1046  }
1047 
1048  /* by the end of the chunk, the stream ptr should equal the frame
1049  * size (minus 1, possibly); if it doesn't, issue a warning */
1050  if ((bytestream2_get_bytes_left(&g2) != 0) && (bytestream2_get_bytes_left(&g2) != 1))
1051  av_log(avctx, AV_LOG_ERROR, "Processed FLI chunk where chunk size = %d " \
1052  "and final chunk ptr = %d\n", buf_size, bytestream2_tell(&g2));
1053 
1054  if ((ret = av_frame_ref(data, s->frame)) < 0)
1055  return ret;
1056 
1057  *got_frame = 1;
1058 
1059  return buf_size;
1060 }
1061 
1063  void *data, int *got_frame,
1064  AVPacket *avpkt)
1065 {
1066  const uint8_t *buf = avpkt->data;
1067  int buf_size = avpkt->size;
1068  if (avctx->pix_fmt == AV_PIX_FMT_PAL8) {
1069  return flic_decode_frame_8BPP(avctx, data, got_frame,
1070  buf, buf_size);
1071  } else if ((avctx->pix_fmt == AV_PIX_FMT_RGB555) ||
1072  (avctx->pix_fmt == AV_PIX_FMT_RGB565)) {
1073  return flic_decode_frame_15_16BPP(avctx, data, got_frame,
1074  buf, buf_size);
1075  } else if (avctx->pix_fmt == AV_PIX_FMT_BGR24) {
1076  return flic_decode_frame_24BPP(avctx, data, got_frame,
1077  buf, buf_size);
1078  }
1079 
1080  /* Should not get here, ever as the pix_fmt is processed */
1081  /* in flic_decode_init and the above if should deal with */
1082  /* the finite set of possibilities allowable by here. */
1083  /* But in case we do, just error out. */
1084  av_log(avctx, AV_LOG_ERROR, "Unknown FLC format, my science cannot explain how this happened.\n");
1085  return AVERROR_BUG;
1086 }
1087 
1088 
1090 {
1091  FlicDecodeContext *s = avctx->priv_data;
1092 
1093  av_frame_free(&s->frame);
1094 
1095  return 0;
1096 }
1097 
1099  .name = "flic",
1100  .long_name = NULL_IF_CONFIG_SMALL("Autodesk Animator Flic video"),
1101  .type = AVMEDIA_TYPE_VIDEO,
1102  .id = AV_CODEC_ID_FLIC,
1103  .priv_data_size = sizeof(FlicDecodeContext),
1105  .close = flic_decode_end,
1107  .capabilities = AV_CODEC_CAP_DR1,
1108 };
#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:194
#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:1669
const char * b
Definition: vf_curves.c:113
enum AVPixelFormat pix_fmt
Pixel format, see AV_PIX_FMT_xxx.
Definition: avcodec.h:1971
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:483
AVCodec.
Definition: avcodec.h:3719
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:1793
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:1858
uint8_t * data
Definition: avcodec.h:1668
#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:779
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:3726
int depth
Definition: v4l.c:62
#define FLI_DTA_BRUN
Definition: flicvideo.c:55
int width
picture width / height.
Definition: avcodec.h:1930
#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:225
main external API structure.
Definition: avcodec.h:1743
void * buf
Definition: avisynth_c.h:690
#define FLI_DTA_LC
Definition: flicvideo.c:57
int extradata_size
Definition: avcodec.h:1859
#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:1062
static av_cold int flic_decode_end(AVCodecContext *avctx)
Definition: flicvideo.c:1089
int palette_has_changed
Tell user application that palette has changed from previous frame.
Definition: frame.h:351
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:208
#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:773
void * priv_data
Definition: avcodec.h:1785
int pixels
Definition: avisynth_c.h:429
unsigned int palette[256]
Definition: flicvideo.c:75
AVCodec ff_flic_decoder
Definition: flicvideo.c:1098
#define AV_PIX_FMT_RGB565
Definition: pixfmt.h:338
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_RL32
Definition: bytestream.h:87
This structure stores compressed data.
Definition: avcodec.h:1645
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:998