FFmpeg  4.4.5
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  int 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)) < 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 = sign_extend(bytestream2_get_le16(&g2), 16);
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  int 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)) < 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 = sign_extend(bytestream2_get_le16(&g2), 16);
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  if (bytestream2_get_bytes_left(&g2) < 2 * s->avctx->width * s->avctx->height )
739  return AVERROR_INVALIDDATA;
740  for (y_ptr = 0; y_ptr < s->frame->linesize[0] * s->avctx->height;
741  y_ptr += s->frame->linesize[0]) {
742 
743  pixel_countdown = s->avctx->width;
744  pixel_ptr = 0;
745  while (pixel_countdown > 0) {
746  *((signed short*)(&pixels[y_ptr + pixel_ptr])) = bytestream2_get_le16(&g2);
747  pixel_ptr += 2;
748  pixel_countdown--;
749  }
750  if (s->avctx->width & 1)
751  bytestream2_skip(&g2, 2);
752  }
753  }
754  break;
755 
756  case FLI_MINI:
757  /* some sort of a thumbnail? disregard this chunk... */
758  bytestream2_skip(&g2, chunk_size - 6);
759  break;
760 
761  default:
762  av_log(avctx, AV_LOG_ERROR, "Unrecognized chunk type: %d\n", chunk_type);
763  break;
764  }
765 
766  if (stream_ptr_after_chunk - bytestream2_tell(&g2) >= 0) {
767  bytestream2_skip(&g2, stream_ptr_after_chunk - bytestream2_tell(&g2));
768  } else {
769  av_log(avctx, AV_LOG_ERROR, "Chunk overread\n");
770  break;
771  }
772 
773  frame_size -= chunk_size;
774  num_chunks--;
775  }
776 
777  /* by the end of the chunk, the stream ptr should equal the frame
778  * size (minus 1, possibly); if it doesn't, issue a warning */
779  if ((bytestream2_get_bytes_left(&g2) != 0) && (bytestream2_get_bytes_left(&g2) != 1))
780  av_log(avctx, AV_LOG_ERROR, "Processed FLI chunk where chunk size = %d " \
781  "and final chunk ptr = %d\n", buf_size, bytestream2_tell(&g2));
782 
783  if ((ret = av_frame_ref(data, s->frame)) < 0)
784  return ret;
785 
786  *got_frame = 1;
787 
788  return buf_size;
789 }
790 
792  void *data, int *got_frame,
793  const uint8_t *buf, int buf_size)
794 {
795  FlicDecodeContext *s = avctx->priv_data;
796 
797  GetByteContext g2;
798  int pixel_ptr;
799  unsigned char palette_idx1;
800 
801  unsigned int frame_size;
802  int num_chunks;
803 
804  unsigned int chunk_size;
805  int chunk_type;
806 
807  int i, j, ret;
808 
809  int lines;
810  int compressed_lines;
811  int line_packets;
812  int y_ptr;
813  int byte_run;
814  int pixel_skip;
815  int pixel_countdown;
816  unsigned char *pixels;
817  int pixel;
818  unsigned int pixel_limit;
819 
820  bytestream2_init(&g2, buf, buf_size);
821 
822  if ((ret = ff_reget_buffer(avctx, s->frame, 0)) < 0)
823  return ret;
824 
825  pixels = s->frame->data[0];
826  pixel_limit = s->avctx->height * s->frame->linesize[0];
827 
828  frame_size = bytestream2_get_le32(&g2);
829  bytestream2_skip(&g2, 2); /* skip the magic number */
830  num_chunks = bytestream2_get_le16(&g2);
831  bytestream2_skip(&g2, 8); /* skip padding */
832  if (frame_size > buf_size)
833  frame_size = buf_size;
834 
835  if (frame_size < 16)
836  return AVERROR_INVALIDDATA;
837  frame_size -= 16;
838 
839  /* iterate through the chunks */
840  while ((frame_size > 0) && (num_chunks > 0) &&
841  bytestream2_get_bytes_left(&g2) >= 4) {
842  int stream_ptr_after_chunk;
843  chunk_size = bytestream2_get_le32(&g2);
844  if (chunk_size > frame_size) {
845  av_log(avctx, AV_LOG_WARNING,
846  "Invalid chunk_size = %u > frame_size = %u\n", chunk_size, frame_size);
847  chunk_size = frame_size;
848  }
849  stream_ptr_after_chunk = bytestream2_tell(&g2) - 4 + chunk_size;
850 
851  chunk_type = bytestream2_get_le16(&g2);
852 
853 
854  switch (chunk_type) {
855  case FLI_256_COLOR:
856  case FLI_COLOR:
857  /* For some reason, it seems that non-palettized flics do
858  * include one of these chunks in their first frame.
859  * Why I do not know, it seems rather extraneous. */
860  ff_dlog(avctx,
861  "Unexpected Palette chunk %d in non-palettized FLC\n",
862  chunk_type);
863  bytestream2_skip(&g2, chunk_size - 6);
864  break;
865 
866  case FLI_DELTA:
867  case FLI_DTA_LC:
868  y_ptr = 0;
869  compressed_lines = bytestream2_get_le16(&g2);
870  while (compressed_lines > 0) {
871  if (bytestream2_tell(&g2) + 2 > stream_ptr_after_chunk)
872  break;
873  if (y_ptr > pixel_limit)
874  return AVERROR_INVALIDDATA;
875  line_packets = sign_extend(bytestream2_get_le16(&g2), 16);
876  if (line_packets < 0) {
877  line_packets = -line_packets;
878  if (line_packets > s->avctx->height)
879  return AVERROR_INVALIDDATA;
880  y_ptr += line_packets * s->frame->linesize[0];
881  } else {
882  compressed_lines--;
883  pixel_ptr = y_ptr;
884  CHECK_PIXEL_PTR(0);
885  pixel_countdown = s->avctx->width;
886  for (i = 0; i < line_packets; i++) {
887  /* account for the skip bytes */
888  if (bytestream2_tell(&g2) + 2 > stream_ptr_after_chunk)
889  break;
890  pixel_skip = bytestream2_get_byte(&g2);
891  pixel_ptr += (pixel_skip*3); /* Pixel is 3 bytes wide */
892  pixel_countdown -= pixel_skip;
893  byte_run = sign_extend(bytestream2_get_byte(&g2), 8);
894  if (byte_run < 0) {
895  byte_run = -byte_run;
896  pixel = bytestream2_get_le24(&g2);
897  CHECK_PIXEL_PTR(3 * byte_run);
898  for (j = 0; j < byte_run; j++, pixel_countdown -= 1) {
899  AV_WL24(&pixels[pixel_ptr], pixel);
900  pixel_ptr += 3;
901  }
902  } else {
903  if (bytestream2_tell(&g2) + 2*byte_run > stream_ptr_after_chunk)
904  break;
905  CHECK_PIXEL_PTR(3 * byte_run);
906  for (j = 0; j < byte_run; j++, pixel_countdown--) {
907  pixel = bytestream2_get_le24(&g2);
908  AV_WL24(&pixels[pixel_ptr], pixel);
909  pixel_ptr += 3;
910  }
911  }
912  }
913 
914  y_ptr += s->frame->linesize[0];
915  }
916  }
917  break;
918 
919  case FLI_LC:
920  av_log(avctx, AV_LOG_ERROR, "Unexpected FLI_LC chunk in non-palettized FLC\n");
921  bytestream2_skip(&g2, chunk_size - 6);
922  break;
923 
924  case FLI_BLACK:
925  /* set the whole frame to 0x00 which is black for 24 bit mode. */
926  memset(pixels, 0x00,
927  s->frame->linesize[0] * s->avctx->height);
928  break;
929 
930  case FLI_BRUN:
931  y_ptr = 0;
932  for (lines = 0; lines < s->avctx->height; lines++) {
933  pixel_ptr = y_ptr;
934  /* disregard the line packets; instead, iterate through all
935  * pixels on a row */
936  bytestream2_skip(&g2, 1);
937  pixel_countdown = (s->avctx->width * 3);
938 
939  while (pixel_countdown > 0) {
940  if (bytestream2_tell(&g2) + 1 > stream_ptr_after_chunk)
941  break;
942  byte_run = sign_extend(bytestream2_get_byte(&g2), 8);
943  if (byte_run > 0) {
944  palette_idx1 = bytestream2_get_byte(&g2);
945  CHECK_PIXEL_PTR(byte_run);
946  for (j = 0; j < byte_run; j++) {
947  pixels[pixel_ptr++] = palette_idx1;
948  pixel_countdown--;
949  if (pixel_countdown < 0)
950  av_log(avctx, AV_LOG_ERROR, "pixel_countdown < 0 (%d) (linea%d)\n",
951  pixel_countdown, lines);
952  }
953  } else { /* copy bytes if byte_run < 0 */
954  byte_run = -byte_run;
955  if (bytestream2_tell(&g2) + byte_run > stream_ptr_after_chunk)
956  break;
957  CHECK_PIXEL_PTR(byte_run);
958  for (j = 0; j < byte_run; j++) {
959  palette_idx1 = bytestream2_get_byte(&g2);
960  pixels[pixel_ptr++] = palette_idx1;
961  pixel_countdown--;
962  if (pixel_countdown < 0)
963  av_log(avctx, AV_LOG_ERROR, "pixel_countdown < 0 (%d) at line %d\n",
964  pixel_countdown, lines);
965  }
966  }
967  }
968 
969  y_ptr += s->frame->linesize[0];
970  }
971  break;
972 
973  case FLI_DTA_BRUN:
974  y_ptr = 0;
975  for (lines = 0; lines < s->avctx->height; lines++) {
976  pixel_ptr = y_ptr;
977  /* disregard the line packets; instead, iterate through all
978  * pixels on a row */
979  bytestream2_skip(&g2, 1);
980  pixel_countdown = s->avctx->width; /* Width is in pixels, not bytes */
981 
982  while (pixel_countdown > 0) {
983  if (bytestream2_tell(&g2) + 1 > stream_ptr_after_chunk)
984  break;
985  byte_run = sign_extend(bytestream2_get_byte(&g2), 8);
986  if (byte_run > 0) {
987  pixel = bytestream2_get_le24(&g2);
988  CHECK_PIXEL_PTR(3 * byte_run);
989  for (j = 0; j < byte_run; j++) {
990  AV_WL24(pixels + pixel_ptr, pixel);
991  pixel_ptr += 3;
992  pixel_countdown--;
993  if (pixel_countdown < 0)
994  av_log(avctx, AV_LOG_ERROR, "pixel_countdown < 0 (%d)\n",
995  pixel_countdown);
996  }
997  } else { /* copy pixels if byte_run < 0 */
998  byte_run = -byte_run;
999  if (bytestream2_tell(&g2) + 3 * byte_run > stream_ptr_after_chunk)
1000  break;
1001  CHECK_PIXEL_PTR(3 * byte_run);
1002  for (j = 0; j < byte_run; j++) {
1003  pixel = bytestream2_get_le24(&g2);
1004  AV_WL24(pixels + pixel_ptr, pixel);
1005  pixel_ptr += 3;
1006  pixel_countdown--;
1007  if (pixel_countdown < 0)
1008  av_log(avctx, AV_LOG_ERROR, "pixel_countdown < 0 (%d)\n",
1009  pixel_countdown);
1010  }
1011  }
1012  }
1013 
1014  y_ptr += s->frame->linesize[0];
1015  }
1016  break;
1017 
1018  case FLI_COPY:
1019  case FLI_DTA_COPY:
1020  /* copy the chunk (uncompressed frame) */
1021  if (chunk_size - 6 > (unsigned int)(FFALIGN(s->avctx->width, 2) * s->avctx->height)*3) {
1022  av_log(avctx, AV_LOG_ERROR, "In chunk FLI_COPY : source data (%d bytes) " \
1023  "bigger than image, skipping chunk\n", chunk_size - 6);
1024  bytestream2_skip(&g2, chunk_size - 6);
1025  } else {
1026  for (y_ptr = 0; y_ptr < s->frame->linesize[0] * s->avctx->height;
1027  y_ptr += s->frame->linesize[0]) {
1028 
1029  bytestream2_get_buffer(&g2, pixels + y_ptr, 3*s->avctx->width);
1030  if (s->avctx->width & 1)
1031  bytestream2_skip(&g2, 3);
1032  }
1033  }
1034  break;
1035 
1036  case FLI_MINI:
1037  /* some sort of a thumbnail? disregard this chunk... */
1038  bytestream2_skip(&g2, chunk_size - 6);
1039  break;
1040 
1041  default:
1042  av_log(avctx, AV_LOG_ERROR, "Unrecognized chunk type: %d\n", chunk_type);
1043  break;
1044  }
1045 
1046  if (stream_ptr_after_chunk - bytestream2_tell(&g2) >= 0) {
1047  bytestream2_skip(&g2, stream_ptr_after_chunk - bytestream2_tell(&g2));
1048  } else {
1049  av_log(avctx, AV_LOG_ERROR, "Chunk overread\n");
1050  break;
1051  }
1052 
1053  frame_size -= chunk_size;
1054  num_chunks--;
1055  }
1056 
1057  /* by the end of the chunk, the stream ptr should equal the frame
1058  * size (minus 1, possibly); if it doesn't, issue a warning */
1059  if ((bytestream2_get_bytes_left(&g2) != 0) && (bytestream2_get_bytes_left(&g2) != 1))
1060  av_log(avctx, AV_LOG_ERROR, "Processed FLI chunk where chunk size = %d " \
1061  "and final chunk ptr = %d\n", buf_size, bytestream2_tell(&g2));
1062 
1063  if ((ret = av_frame_ref(data, s->frame)) < 0)
1064  return ret;
1065 
1066  *got_frame = 1;
1067 
1068  return buf_size;
1069 }
1070 
1072  void *data, int *got_frame,
1073  AVPacket *avpkt)
1074 {
1075  const uint8_t *buf = avpkt->data;
1076  int buf_size = avpkt->size;
1077  if (avctx->pix_fmt == AV_PIX_FMT_PAL8) {
1078  return flic_decode_frame_8BPP(avctx, data, got_frame,
1079  buf, buf_size);
1080  } else if ((avctx->pix_fmt == AV_PIX_FMT_RGB555) ||
1081  (avctx->pix_fmt == AV_PIX_FMT_RGB565)) {
1082  return flic_decode_frame_15_16BPP(avctx, data, got_frame,
1083  buf, buf_size);
1084  } else if (avctx->pix_fmt == AV_PIX_FMT_BGR24) {
1085  return flic_decode_frame_24BPP(avctx, data, got_frame,
1086  buf, buf_size);
1087  }
1088 
1089  /* Should not get here, ever as the pix_fmt is processed */
1090  /* in flic_decode_init and the above if should deal with */
1091  /* the finite set of possibilities allowable by here. */
1092  /* But in case we do, just error out. */
1093  av_log(avctx, AV_LOG_ERROR, "Unknown FLC format, my science cannot explain how this happened.\n");
1094  return AVERROR_BUG;
1095 }
1096 
1097 
1099 {
1100  FlicDecodeContext *s = avctx->priv_data;
1101 
1102  av_frame_free(&s->frame);
1103 
1104  return 0;
1105 }
1106 
1108  .name = "flic",
1109  .long_name = NULL_IF_CONFIG_SMALL("Autodesk Animator Flic video"),
1110  .type = AVMEDIA_TYPE_VIDEO,
1111  .id = AV_CODEC_ID_FLIC,
1112  .priv_data_size = sizeof(FlicDecodeContext),
1114  .close = flic_decode_end,
1116  .capabilities = AV_CODEC_CAP_DR1,
1117 };
#define av_cold
Definition: attributes.h:88
uint8_t
Libavcodec external API header.
#define AV_RL16
Definition: intreadwrite.h:42
#define AV_RL32
Definition: intreadwrite.h:146
static av_cold int init(AVCodecContext *avctx)
Definition: avrndec.c:31
static av_always_inline unsigned int bytestream2_get_buffer(GetByteContext *g, uint8_t *dst, unsigned int size)
Definition: bytestream.h:267
static av_always_inline int bytestream2_get_bytes_left(GetByteContext *g)
Definition: bytestream.h:158
static av_always_inline void bytestream2_init(GetByteContext *g, const uint8_t *buf, int buf_size)
Definition: bytestream.h:137
static av_always_inline void bytestream2_skip(GetByteContext *g, unsigned int size)
Definition: bytestream.h:168
static av_always_inline int bytestream2_tell(GetByteContext *g)
Definition: bytestream.h:192
#define s(width, name)
Definition: cbs_vp9.c:257
int ff_reget_buffer(AVCodecContext *avctx, AVFrame *frame, int flags)
Identical in function to ff_get_buffer(), except it reuses the existing buffer if available.
Definition: decode.c:2007
static void decode(AVCodecContext *dec_ctx, AVPacket *pkt, AVFrame *frame, FILE *outfile)
Definition: decode_audio.c:71
static av_cold int flic_decode_init(AVCodecContext *avctx)
Definition: flicvideo.c:80
#define FLI_COPY
Definition: flicvideo.c:53
#define FLC_FLX_TYPE_CODE
Definition: flicvideo.c:60
#define FLI_BLACK
Definition: flicvideo.c:51
#define FLI_MINI
Definition: flicvideo.c:54
#define FLI_256_COLOR
Definition: flicvideo.c:47
#define FLI_DTA_COPY
Definition: flicvideo.c:56
static av_cold int flic_decode_end(AVCodecContext *avctx)
Definition: flicvideo.c:1098
#define FLC_MAGIC_CARPET_SYNTHETIC_TYPE_CODE
Definition: flicvideo.c:62
#define FLI_BRUN
Definition: flicvideo.c:52
#define FLI_DTA_BRUN
Definition: flicvideo.c:55
#define FLI_LC
Definition: flicvideo.c:50
static int flic_decode_frame(AVCodecContext *avctx, void *data, int *got_frame, AVPacket *avpkt)
Definition: flicvideo.c:1071
#define FLI_DELTA
Definition: flicvideo.c:48
#define FLI_DTA_LC
Definition: flicvideo.c:57
AVCodec ff_flic_decoder
Definition: flicvideo.c:1107
#define FLI_TYPE_CODE
Definition: flicvideo.c:59
static int flic_decode_frame_8BPP(AVCodecContext *avctx, void *data, int *got_frame, const uint8_t *buf, int buf_size)
Definition: flicvideo.c:150
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
static int flic_decode_frame_24BPP(AVCodecContext *avctx, void *data, int *got_frame, const uint8_t *buf, int buf_size)
Definition: flicvideo.c:791
#define CHECK_PIXEL_PTR(n)
Definition: flicvideo.c:64
#define FLI_COLOR
Definition: flicvideo.c:49
#define AV_CODEC_CAP_DR1
Codec uses get_buffer() or get_encode_buffer() for allocating buffers and supports custom allocators.
Definition: codec.h:52
@ AV_CODEC_ID_FLIC
Definition: codec_id.h:99
#define AV_INPUT_BUFFER_PADDING_SIZE
Required number of additionally allocated bytes at the end of the input bitstream for decoding.
Definition: avcodec.h:215
#define AVERROR_BUG
Internal bug, also see AVERROR_BUG2.
Definition: error.h:50
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:59
#define AVERROR(e)
Definition: error.h:43
int av_frame_ref(AVFrame *dst, const AVFrame *src)
Set up a new reference to the data described by the source frame.
Definition: frame.c:443
void av_frame_free(AVFrame **frame)
Free the frame and any dynamically allocated objects in it, e.g.
Definition: frame.c:203
AVFrame * av_frame_alloc(void)
Allocate an AVFrame and set its fields to default values.
Definition: frame.c:190
#define AV_LOG_WARNING
Something somehow does not look correct.
Definition: log.h:200
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:194
@ AVMEDIA_TYPE_VIDEO
Definition: avutil.h:201
int i
Definition: input.c:407
#define AV_WL24(p, d)
Definition: intreadwrite.h:464
common internal API header
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification.
Definition: internal.h:117
#define FFALIGN(x, a)
Definition: macros.h:48
static av_const int sign_extend(int val, unsigned bits)
Definition: mathops.h:130
const char data[16]
Definition: mxf.c:142
int frame_size
Definition: mxfenc.c:2206
@ AV_PIX_FMT_PAL8
8 bits with AV_PIX_FMT_RGB32 palette
Definition: pixfmt.h:77
@ AV_PIX_FMT_BGR24
packed RGB 8:8:8, 24bpp, BGRBGR...
Definition: pixfmt.h:69
#define AV_PIX_FMT_RGB565
Definition: pixfmt.h:386
#define AVPALETTE_SIZE
Definition: pixfmt.h:32
#define AV_PIX_FMT_RGB555
Definition: pixfmt.h:387
main external API structure.
Definition: avcodec.h:536
enum AVPixelFormat pix_fmt
Pixel format, see AV_PIX_FMT_xxx.
Definition: avcodec.h:746
uint8_t * extradata
some codecs need / can use extradata like Huffman tables.
Definition: avcodec.h:637
int extradata_size
Definition: avcodec.h:638
void * priv_data
Definition: avcodec.h:563
AVCodec.
Definition: codec.h:197
const char * name
Name of the codec implementation.
Definition: codec.h:204
This structure describes decoded (raw) audio or video data.
Definition: frame.h:318
This structure stores compressed data.
Definition: packet.h:346
int size
Definition: packet.h:370
uint8_t * data
Definition: packet.h:369
unsigned int palette[256]
Definition: flicvideo.c:75
AVCodecContext * avctx
Definition: flicvideo.c:72
AVFrame * frame
Definition: flicvideo.c:73
#define ff_dlog(a,...)
#define av_log(a,...)
uint8_t pixel
Definition: tiny_ssim.c:42
const char * b
Definition: vf_curves.c:118
const char * g
Definition: vf_curves.c:117
const char * r
Definition: vf_curves.c:116
if(ret< 0)
Definition: vf_mcdeint.c:282