FFmpeg
 All Data Structures Namespaces Files Functions Variables Typedefs Enumerations Enumerator Macros Groups Pages
flicvideo.c
Go to the documentation of this file.
1 /*
2  * FLI/FLC Animation Video Decoder
3  * Copyright (C) 2003, 2004 The FFmpeg project
4  *
5  * This file is part of FFmpeg.
6  *
7  * FFmpeg is free software; you can redistribute it and/or
8  * modify it under the terms of the GNU Lesser General Public
9  * License as published by the Free Software Foundation; either
10  * version 2.1 of the License, or (at your option) any later version.
11  *
12  * FFmpeg is distributed in the hope that it will be useful,
13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15  * Lesser General Public License for more details.
16  *
17  * You should have received a copy of the GNU Lesser General Public
18  * License along with FFmpeg; if not, write to the Free Software
19  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20  */
21 
22 /**
23  * @file
24  * Autodesk Animator FLI/FLC Video Decoder
25  * by Mike Melanson (melanson@pcisys.net)
26  * for more information on the .fli/.flc file format and all of its many
27  * variations, visit:
28  * http://www.compuphase.com/flic.htm
29  *
30  * This decoder outputs PAL8/RGB555/RGB565 and maybe one day RGB24
31  * colorspace data, depending on the FLC. To use this decoder, be
32  * sure that your demuxer sends the FLI file header to the decoder via
33  * the extradata chunk in AVCodecContext. The chunk should be 128 bytes
34  * large. The only exception is for FLI files from the game "Magic Carpet",
35  * in which the header is only 12 bytes.
36  */
37 
38 #include <stdio.h>
39 #include <stdlib.h>
40 #include <string.h>
41 
42 #include "libavutil/intreadwrite.h"
43 #include "avcodec.h"
44 #include "bytestream.h"
45 #include "internal.h"
46 #include "mathops.h"
47 
48 #define FLI_256_COLOR 4
49 #define FLI_DELTA 7
50 #define FLI_COLOR 11
51 #define FLI_LC 12
52 #define FLI_BLACK 13
53 #define FLI_BRUN 15
54 #define FLI_COPY 16
55 #define FLI_MINI 18
56 #define FLI_DTA_BRUN 25
57 #define FLI_DTA_COPY 26
58 #define FLI_DTA_LC 27
59 
60 #define FLI_TYPE_CODE (0xAF11)
61 #define FLC_FLX_TYPE_CODE (0xAF12)
62 #define FLC_DTA_TYPE_CODE (0xAF44) /* Marks an "Extended FLC" comes from Dave's Targa Animator (DTA) */
63 #define FLC_MAGIC_CARPET_SYNTHETIC_TYPE_CODE (0xAF13)
64 
65 #define CHECK_PIXEL_PTR(n) \
66  if (pixel_ptr + n > pixel_limit) { \
67  av_log (s->avctx, AV_LOG_ERROR, "Invalid pixel_ptr = %d > pixel_limit = %d\n", \
68  pixel_ptr + n, pixel_limit); \
69  return AVERROR_INVALIDDATA; \
70  } \
71 
72 typedef struct FlicDecodeContext {
75 
76  unsigned int palette[256];
78  int fli_type; /* either 0xAF11 or 0xAF12, affects palette resolution */
80 
82 {
83  FlicDecodeContext *s = avctx->priv_data;
84  unsigned char *fli_header = (unsigned char *)avctx->extradata;
85  int depth;
86 
87  if (avctx->extradata_size != 0 &&
88  avctx->extradata_size != 12 &&
89  avctx->extradata_size != 128 &&
90  avctx->extradata_size != 256 &&
91  avctx->extradata_size != 904 &&
92  avctx->extradata_size != 1024) {
93  av_log(avctx, AV_LOG_ERROR, "Unexpected extradata size %d\n", avctx->extradata_size);
94  return AVERROR_INVALIDDATA;
95  }
96 
97  s->avctx = avctx;
98 
99  if (s->avctx->extradata_size == 12) {
100  /* special case for magic carpet FLIs */
102  depth = 8;
103  } else if (avctx->extradata_size == 1024) {
104  uint8_t *ptr = avctx->extradata;
105  int i;
106 
107  for (i = 0; i < 256; i++) {
108  s->palette[i] = AV_RL32(ptr);
109  ptr += 4;
110  }
111  depth = 8;
112  /* FLI in MOV, see e.g. FFmpeg trac issue #626 */
113  } else if (avctx->extradata_size == 0 ||
114  avctx->extradata_size == 256 ||
115  /* see FFmpeg ticket #1234 */
116  avctx->extradata_size == 904) {
117  s->fli_type = FLI_TYPE_CODE;
118  depth = 8;
119  } else {
120  s->fli_type = AV_RL16(&fli_header[4]);
121  depth = AV_RL16(&fli_header[12]);
122  }
123 
124  if (depth == 0) {
125  depth = 8; /* Some FLC generators set depth to zero, when they mean 8Bpp. Fix up here */
126  }
127 
128  if ((s->fli_type == FLC_FLX_TYPE_CODE) && (depth == 16)) {
129  depth = 15; /* Original Autodesk FLX's say the depth is 16Bpp when it is really 15Bpp */
130  }
131 
132  switch (depth) {
133  case 8 : avctx->pix_fmt = AV_PIX_FMT_PAL8; break;
134  case 15 : avctx->pix_fmt = AV_PIX_FMT_RGB555; break;
135  case 16 : avctx->pix_fmt = AV_PIX_FMT_RGB565; break;
136  case 24 : avctx->pix_fmt = AV_PIX_FMT_BGR24; /* Supposedly BGR, but no files to test with */
137  avpriv_request_sample(avctx, "24Bpp FLC/FLX");
138  return AVERROR_PATCHWELCOME;
139  default :
140  av_log(avctx, AV_LOG_ERROR, "Unknown FLC/FLX depth of %d Bpp is unsupported.\n",depth);
141  return AVERROR_INVALIDDATA;
142  }
143 
144  s->frame = av_frame_alloc();
145  if (!s->frame)
146  return AVERROR(ENOMEM);
147 
148  s->new_palette = 0;
149 
150  return 0;
151 }
152 
154  void *data, int *got_frame,
155  const uint8_t *buf, int buf_size)
156 {
157  FlicDecodeContext *s = avctx->priv_data;
158 
159  GetByteContext g2;
160  int pixel_ptr;
161  int palette_ptr;
162  unsigned char palette_idx1;
163  unsigned char palette_idx2;
164 
165  unsigned int frame_size;
166  int num_chunks;
167 
168  unsigned int chunk_size;
169  int chunk_type;
170 
171  int i, j, ret;
172 
173  int color_packets;
174  int color_changes;
175  int color_shift;
176  unsigned char r, g, b;
177 
178  int lines;
179  int compressed_lines;
180  int starting_line;
181  signed short line_packets;
182  int y_ptr;
183  int byte_run;
184  int pixel_skip;
185  int pixel_countdown;
186  unsigned char *pixels;
187  unsigned int pixel_limit;
188 
189  bytestream2_init(&g2, buf, buf_size);
190 
191  if ((ret = ff_reget_buffer(avctx, s->frame)) < 0)
192  return ret;
193 
194  pixels = s->frame->data[0];
195  pixel_limit = s->avctx->height * s->frame->linesize[0];
196  if (buf_size < 16 || buf_size > INT_MAX - (3 * 256 + AV_INPUT_BUFFER_PADDING_SIZE))
197  return AVERROR_INVALIDDATA;
198  frame_size = bytestream2_get_le32(&g2);
199  if (frame_size > buf_size)
200  frame_size = buf_size;
201  bytestream2_skip(&g2, 2); /* skip the magic number */
202  num_chunks = bytestream2_get_le16(&g2);
203  bytestream2_skip(&g2, 8); /* skip padding */
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 
453  frame_size -= chunk_size;
454  num_chunks--;
455  }
456 
457  /* by the end of the chunk, the stream ptr should equal the frame
458  * size (minus 1 or 2, possibly); if it doesn't, issue a warning */
459  if (bytestream2_get_bytes_left(&g2) > 2)
460  av_log(avctx, AV_LOG_ERROR, "Processed FLI chunk where chunk size = %d " \
461  "and final chunk ptr = %d\n", buf_size,
462  buf_size - bytestream2_get_bytes_left(&g2));
463 
464  /* make the palette available on the way out */
465  memcpy(s->frame->data[1], s->palette, AVPALETTE_SIZE);
466  if (s->new_palette) {
467  s->frame->palette_has_changed = 1;
468  s->new_palette = 0;
469  }
470 
471  if ((ret = av_frame_ref(data, s->frame)) < 0)
472  return ret;
473 
474  *got_frame = 1;
475 
476  return buf_size;
477 }
478 
480  void *data, int *got_frame,
481  const uint8_t *buf, int buf_size)
482 {
483  /* Note, the only difference between the 15Bpp and 16Bpp */
484  /* Format is the pixel format, the packets are processed the same. */
485  FlicDecodeContext *s = avctx->priv_data;
486 
487  GetByteContext g2;
488  int pixel_ptr;
489  unsigned char palette_idx1;
490 
491  unsigned int frame_size;
492  int num_chunks;
493 
494  unsigned int chunk_size;
495  int chunk_type;
496 
497  int i, j, ret;
498 
499  int lines;
500  int compressed_lines;
501  signed short line_packets;
502  int y_ptr;
503  int byte_run;
504  int pixel_skip;
505  int pixel_countdown;
506  unsigned char *pixels;
507  int pixel;
508  unsigned int pixel_limit;
509 
510  bytestream2_init(&g2, buf, buf_size);
511 
512  if ((ret = ff_reget_buffer(avctx, s->frame)) < 0)
513  return ret;
514 
515  pixels = s->frame->data[0];
516  pixel_limit = s->avctx->height * s->frame->linesize[0];
517 
518  frame_size = bytestream2_get_le32(&g2);
519  bytestream2_skip(&g2, 2); /* skip the magic number */
520  num_chunks = bytestream2_get_le16(&g2);
521  bytestream2_skip(&g2, 8); /* skip padding */
522  if (frame_size > buf_size)
523  frame_size = buf_size;
524 
525  frame_size -= 16;
526 
527  /* iterate through the chunks */
528  while ((frame_size > 0) && (num_chunks > 0) &&
529  bytestream2_get_bytes_left(&g2) >= 4) {
530  int stream_ptr_after_chunk;
531  chunk_size = bytestream2_get_le32(&g2);
532  if (chunk_size > frame_size) {
533  av_log(avctx, AV_LOG_WARNING,
534  "Invalid chunk_size = %u > frame_size = %u\n", chunk_size, frame_size);
535  chunk_size = frame_size;
536  }
537  stream_ptr_after_chunk = bytestream2_tell(&g2) - 4 + chunk_size;
538 
539  chunk_type = bytestream2_get_le16(&g2);
540 
541 
542  switch (chunk_type) {
543  case FLI_256_COLOR:
544  case FLI_COLOR:
545  /* For some reason, it seems that non-palettized flics do
546  * include one of these chunks in their first frame.
547  * Why I do not know, it seems rather extraneous. */
548  ff_dlog(avctx,
549  "Unexpected Palette chunk %d in non-palettized FLC\n",
550  chunk_type);
551  bytestream2_skip(&g2, chunk_size - 6);
552  break;
553 
554  case FLI_DELTA:
555  case FLI_DTA_LC:
556  y_ptr = 0;
557  compressed_lines = bytestream2_get_le16(&g2);
558  while (compressed_lines > 0) {
559  if (bytestream2_tell(&g2) + 2 > stream_ptr_after_chunk)
560  break;
561  line_packets = bytestream2_get_le16(&g2);
562  if (line_packets < 0) {
563  line_packets = -line_packets;
564  y_ptr += line_packets * s->frame->linesize[0];
565  } else {
566  compressed_lines--;
567  pixel_ptr = y_ptr;
568  CHECK_PIXEL_PTR(0);
569  pixel_countdown = s->avctx->width;
570  for (i = 0; i < line_packets; i++) {
571  /* account for the skip bytes */
572  if (bytestream2_tell(&g2) + 2 > stream_ptr_after_chunk)
573  break;
574  pixel_skip = bytestream2_get_byte(&g2);
575  pixel_ptr += (pixel_skip*2); /* Pixel is 2 bytes wide */
576  pixel_countdown -= pixel_skip;
577  byte_run = sign_extend(bytestream2_get_byte(&g2), 8);
578  if (byte_run < 0) {
579  byte_run = -byte_run;
580  pixel = bytestream2_get_le16(&g2);
581  CHECK_PIXEL_PTR(2 * byte_run);
582  for (j = 0; j < byte_run; j++, pixel_countdown -= 2) {
583  *((signed short*)(&pixels[pixel_ptr])) = pixel;
584  pixel_ptr += 2;
585  }
586  } else {
587  if (bytestream2_tell(&g2) + 2*byte_run > stream_ptr_after_chunk)
588  break;
589  CHECK_PIXEL_PTR(2 * byte_run);
590  for (j = 0; j < byte_run; j++, pixel_countdown--) {
591  *((signed short*)(&pixels[pixel_ptr])) = bytestream2_get_le16(&g2);
592  pixel_ptr += 2;
593  }
594  }
595  }
596 
597  y_ptr += s->frame->linesize[0];
598  }
599  }
600  break;
601 
602  case FLI_LC:
603  av_log(avctx, AV_LOG_ERROR, "Unexpected FLI_LC chunk in non-palettized FLC\n");
604  bytestream2_skip(&g2, chunk_size - 6);
605  break;
606 
607  case FLI_BLACK:
608  /* set the whole frame to 0x0000 which is black in both 15Bpp and 16Bpp modes. */
609  memset(pixels, 0x0000,
610  s->frame->linesize[0] * s->avctx->height);
611  break;
612 
613  case FLI_BRUN:
614  y_ptr = 0;
615  for (lines = 0; lines < s->avctx->height; lines++) {
616  pixel_ptr = y_ptr;
617  /* disregard the line packets; instead, iterate through all
618  * pixels on a row */
619  bytestream2_skip(&g2, 1);
620  pixel_countdown = (s->avctx->width * 2);
621 
622  while (pixel_countdown > 0) {
623  if (bytestream2_tell(&g2) + 1 > stream_ptr_after_chunk)
624  break;
625  byte_run = sign_extend(bytestream2_get_byte(&g2), 8);
626  if (byte_run > 0) {
627  palette_idx1 = bytestream2_get_byte(&g2);
628  CHECK_PIXEL_PTR(byte_run);
629  for (j = 0; j < byte_run; j++) {
630  pixels[pixel_ptr++] = palette_idx1;
631  pixel_countdown--;
632  if (pixel_countdown < 0)
633  av_log(avctx, AV_LOG_ERROR, "pixel_countdown < 0 (%d) (linea%d)\n",
634  pixel_countdown, lines);
635  }
636  } else { /* copy bytes if byte_run < 0 */
637  byte_run = -byte_run;
638  if (bytestream2_tell(&g2) + byte_run > stream_ptr_after_chunk)
639  break;
640  CHECK_PIXEL_PTR(byte_run);
641  for (j = 0; j < byte_run; j++) {
642  palette_idx1 = bytestream2_get_byte(&g2);
643  pixels[pixel_ptr++] = palette_idx1;
644  pixel_countdown--;
645  if (pixel_countdown < 0)
646  av_log(avctx, AV_LOG_ERROR, "pixel_countdown < 0 (%d) at line %d\n",
647  pixel_countdown, lines);
648  }
649  }
650  }
651 
652  /* Now FLX is strange, in that it is "byte" as opposed to "pixel" run length compressed.
653  * This does not give us any good opportunity to perform word endian conversion
654  * during decompression. So if it is required (i.e., this is not a LE target, we do
655  * a second pass over the line here, swapping the bytes.
656  */
657 #if HAVE_BIGENDIAN
658  pixel_ptr = y_ptr;
659  pixel_countdown = s->avctx->width;
660  while (pixel_countdown > 0) {
661  *((signed short*)(&pixels[pixel_ptr])) = AV_RL16(&buf[pixel_ptr]);
662  pixel_ptr += 2;
663  }
664 #endif
665  y_ptr += s->frame->linesize[0];
666  }
667  break;
668 
669  case FLI_DTA_BRUN:
670  y_ptr = 0;
671  for (lines = 0; lines < s->avctx->height; lines++) {
672  pixel_ptr = y_ptr;
673  /* disregard the line packets; instead, iterate through all
674  * pixels on a row */
675  bytestream2_skip(&g2, 1);
676  pixel_countdown = s->avctx->width; /* Width is in pixels, not bytes */
677 
678  while (pixel_countdown > 0) {
679  if (bytestream2_tell(&g2) + 1 > stream_ptr_after_chunk)
680  break;
681  byte_run = sign_extend(bytestream2_get_byte(&g2), 8);
682  if (byte_run > 0) {
683  pixel = bytestream2_get_le16(&g2);
684  CHECK_PIXEL_PTR(2 * byte_run);
685  for (j = 0; j < byte_run; j++) {
686  *((signed short*)(&pixels[pixel_ptr])) = pixel;
687  pixel_ptr += 2;
688  pixel_countdown--;
689  if (pixel_countdown < 0)
690  av_log(avctx, AV_LOG_ERROR, "pixel_countdown < 0 (%d)\n",
691  pixel_countdown);
692  }
693  } else { /* copy pixels if byte_run < 0 */
694  byte_run = -byte_run;
695  if (bytestream2_tell(&g2) + 2 * byte_run > stream_ptr_after_chunk)
696  break;
697  CHECK_PIXEL_PTR(2 * byte_run);
698  for (j = 0; j < byte_run; j++) {
699  *((signed short*)(&pixels[pixel_ptr])) = bytestream2_get_le16(&g2);
700  pixel_ptr += 2;
701  pixel_countdown--;
702  if (pixel_countdown < 0)
703  av_log(avctx, AV_LOG_ERROR, "pixel_countdown < 0 (%d)\n",
704  pixel_countdown);
705  }
706  }
707  }
708 
709  y_ptr += s->frame->linesize[0];
710  }
711  break;
712 
713  case FLI_COPY:
714  case FLI_DTA_COPY:
715  /* copy the chunk (uncompressed frame) */
716  if (chunk_size - 6 > (unsigned int)(FFALIGN(s->avctx->width, 2) * s->avctx->height)*2) {
717  av_log(avctx, AV_LOG_ERROR, "In chunk FLI_COPY : source data (%d bytes) " \
718  "bigger than image, skipping chunk\n", chunk_size - 6);
719  bytestream2_skip(&g2, chunk_size - 6);
720  } else {
721 
722  for (y_ptr = 0; y_ptr < s->frame->linesize[0] * s->avctx->height;
723  y_ptr += s->frame->linesize[0]) {
724 
725  pixel_countdown = s->avctx->width;
726  pixel_ptr = 0;
727  while (pixel_countdown > 0) {
728  *((signed short*)(&pixels[y_ptr + pixel_ptr])) = bytestream2_get_le16(&g2);
729  pixel_ptr += 2;
730  pixel_countdown--;
731  }
732  if (s->avctx->width & 1)
733  bytestream2_skip(&g2, 2);
734  }
735  }
736  break;
737 
738  case FLI_MINI:
739  /* some sort of a thumbnail? disregard this chunk... */
740  bytestream2_skip(&g2, chunk_size - 6);
741  break;
742 
743  default:
744  av_log(avctx, AV_LOG_ERROR, "Unrecognized chunk type: %d\n", chunk_type);
745  break;
746  }
747 
748  frame_size -= chunk_size;
749  num_chunks--;
750  }
751 
752  /* by the end of the chunk, the stream ptr should equal the frame
753  * size (minus 1, possibly); if it doesn't, issue a warning */
754  if ((bytestream2_get_bytes_left(&g2) != 0) && (bytestream2_get_bytes_left(&g2) != 1))
755  av_log(avctx, AV_LOG_ERROR, "Processed FLI chunk where chunk size = %d " \
756  "and final chunk ptr = %d\n", buf_size, bytestream2_tell(&g2));
757 
758  if ((ret = av_frame_ref(data, s->frame)) < 0)
759  return ret;
760 
761  *got_frame = 1;
762 
763  return buf_size;
764 }
765 
767  void *data, int *got_frame,
768  const uint8_t *buf, int buf_size)
769 {
770  av_log(avctx, AV_LOG_ERROR, "24Bpp FLC Unsupported due to lack of test files.\n");
771  return AVERROR_PATCHWELCOME;
772 }
773 
775  void *data, int *got_frame,
776  AVPacket *avpkt)
777 {
778  const uint8_t *buf = avpkt->data;
779  int buf_size = avpkt->size;
780  if (avctx->pix_fmt == AV_PIX_FMT_PAL8) {
781  return flic_decode_frame_8BPP(avctx, data, got_frame,
782  buf, buf_size);
783  }
784  else if ((avctx->pix_fmt == AV_PIX_FMT_RGB555) ||
785  (avctx->pix_fmt == AV_PIX_FMT_RGB565)) {
786  return flic_decode_frame_15_16BPP(avctx, data, got_frame,
787  buf, buf_size);
788  }
789  else if (avctx->pix_fmt == AV_PIX_FMT_BGR24) {
790  return flic_decode_frame_24BPP(avctx, data, got_frame,
791  buf, buf_size);
792  }
793 
794  /* Should not get here, ever as the pix_fmt is processed */
795  /* in flic_decode_init and the above if should deal with */
796  /* the finite set of possibilities allowable by here. */
797  /* But in case we do, just error out. */
798  av_log(avctx, AV_LOG_ERROR, "Unknown FLC format, my science cannot explain how this happened.\n");
799  return AVERROR_BUG;
800 }
801 
802 
804 {
805  FlicDecodeContext *s = avctx->priv_data;
806 
807  av_frame_free(&s->frame);
808 
809  return 0;
810 }
811 
813  .name = "flic",
814  .long_name = NULL_IF_CONFIG_SMALL("Autodesk Animator Flic video"),
815  .type = AVMEDIA_TYPE_VIDEO,
816  .id = AV_CODEC_ID_FLIC,
817  .priv_data_size = sizeof(FlicDecodeContext),
819  .close = flic_decode_end,
821  .capabilities = AV_CODEC_CAP_DR1,
822 };
#define FLI_DTA_COPY
Definition: flicvideo.c:57
AVCodecContext * avctx
Definition: flicvideo.c:73
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:184
#define FLI_TYPE_CODE
Definition: flicvideo.c:60
ptrdiff_t const GLvoid * data
Definition: opengl_enc.c:101
#define FLI_MINI
Definition: flicvideo.c:55
#define AV_LOG_WARNING
Something somehow does not look correct.
Definition: log.h:182
#define CHECK_PIXEL_PTR(n)
Definition: flicvideo.c:65
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:54
int size
Definition: avcodec.h:1601
const char * b
Definition: vf_curves.c:113
enum AVPixelFormat pix_fmt
Pixel format, see AV_PIX_FMT_xxx.
Definition: avcodec.h:1903
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:479
AVCodec.
Definition: avcodec.h:3589
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_WL32 unsigned int_TMPL AV_WL24 unsigned int_TMPL AV_RL16
Definition: bytestream.h:87
static int flic_decode_frame_8BPP(AVCodecContext *avctx, void *data, int *got_frame, const uint8_t *buf, int buf_size)
Definition: flicvideo.c:153
void void avpriv_request_sample(void *avc, const char *msg,...) av_printf_format(2
Log a generic warning message about a missing feature.
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:141
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:50
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:375
uint8_t * extradata
some codecs need / can use extradata like Huffman tables.
Definition: avcodec.h:1790
uint8_t * data
Definition: avcodec.h:1600
#define ff_dlog(a,...)
#define FLI_LC
Definition: flicvideo.c:51
#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:53
AVFrame * frame
Definition: flicvideo.c:74
#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:766
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:154
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:176
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:63
const char * name
Name of the codec implementation.
Definition: avcodec.h:3596
int depth
Definition: v4l.c:62
int ff_reget_buffer(AVCodecContext *avctx, AVFrame *frame)
Identical in function to av_frame_make_writable(), except it uses ff_get_buffer() to allocate the buf...
Definition: utils.c:983
#define FLI_DTA_BRUN
Definition: flicvideo.c:56
int width
picture width / height.
Definition: avcodec.h:1862
#define FLC_FLX_TYPE_CODE
Definition: flicvideo.c:61
#define FLI_256_COLOR
Definition: flicvideo.c:48
packed RGB 8:8:8, 24bpp, BGRBGR...
Definition: pixfmt.h:65
#define FLI_DELTA
Definition: flicvideo.c:49
#define AVERROR_PATCHWELCOME
Not yet implemented in FFmpeg, patches welcome.
Definition: error.h:62
static av_always_inline int bytestream2_tell(GetByteContext *g)
Definition: bytestream.h:188
int frame_size
Definition: mxfenc.c:1822
Libavcodec external API header.
int linesize[AV_NUM_DATA_POINTERS]
For video, size in bytes of each picture line.
Definition: frame.h:215
main external API structure.
Definition: avcodec.h:1675
void * buf
Definition: avisynth_c.h:690
#define FLI_DTA_LC
Definition: flicvideo.c:58
int extradata_size
Definition: avcodec.h:1791
#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:774
static av_cold int flic_decode_end(AVCodecContext *avctx)
Definition: flicvideo.c:803
int palette_has_changed
Tell user application that palette has changed from previous frame.
Definition: frame.h:328
uint8_t pixel
Definition: tiny_ssim.c:42
static av_const int sign_extend(int val, unsigned bits)
Definition: mathops.h:139
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
Definition: frame.h:198
#define FLI_BLACK
Definition: flicvideo.c:52
static int decode(AVCodecContext *avctx, void *data, int *got_sub, AVPacket *avpkt)
Definition: ccaption_dec.c:750
common internal api header.
if(ret< 0)
Definition: vf_mcdeint.c:282
#define AV_PIX_FMT_RGB555
Definition: pixfmt.h:331
#define AV_INPUT_BUFFER_PADDING_SIZE
Required number of additionally allocated bytes at the end of the input bitstream for decoding...
Definition: avcodec.h:733
void * priv_data
Definition: avcodec.h:1717
int pixels
Definition: avisynth_c.h:429
unsigned int palette[256]
Definition: flicvideo.c:76
AVCodec ff_flic_decoder
Definition: flicvideo.c:812
#define AV_PIX_FMT_RGB565
Definition: pixfmt.h:330
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_RL32
Definition: bytestream.h:87
This structure stores compressed data.
Definition: avcodec.h:1577
static av_cold int flic_decode_init(AVCodecContext *avctx)
Definition: flicvideo.c:81
#define AV_CODEC_CAP_DR1
Codec uses get_buffer() for allocating buffers and supports custom allocators.
Definition: avcodec.h:958