FFmpeg  2.1.1
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 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 havent any 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 
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 + FF_INPUT_BUFFER_PADDING_SIZE))
194  return AVERROR_INVALIDDATA;
195  frame_size = bytestream2_get_le32(&g2);
196  if (frame_size > buf_size)
197  frame_size = buf_size;
198  bytestream2_skip(&g2, 2); /* skip the magic number */
199  num_chunks = bytestream2_get_le16(&g2);
200  bytestream2_skip(&g2, 8); /* skip padding */
201 
202  frame_size -= 16;
203 
204  /* iterate through the chunks */
205  while ((frame_size >= 6) && (num_chunks > 0) &&
206  bytestream2_get_bytes_left(&g2) >= 4) {
207  int stream_ptr_after_chunk;
208  chunk_size = bytestream2_get_le32(&g2);
209  if (chunk_size > frame_size) {
210  av_log(avctx, AV_LOG_WARNING,
211  "Invalid chunk_size = %u > frame_size = %u\n", chunk_size, frame_size);
212  chunk_size = frame_size;
213  }
214  stream_ptr_after_chunk = bytestream2_tell(&g2) - 4 + chunk_size;
215 
216  chunk_type = bytestream2_get_le16(&g2);
217 
218  switch (chunk_type) {
219  case FLI_256_COLOR:
220  case FLI_COLOR:
221  /* check special case: If this file is from the Magic Carpet
222  * game and uses 6-bit colors even though it reports 256-color
223  * chunks in a 0xAF12-type file (fli_type is set to 0xAF13 during
224  * initialization) */
225  if ((chunk_type == FLI_256_COLOR) && (s->fli_type != FLC_MAGIC_CARPET_SYNTHETIC_TYPE_CODE))
226  color_shift = 0;
227  else
228  color_shift = 2;
229  /* set up the palette */
230  color_packets = bytestream2_get_le16(&g2);
231  palette_ptr = 0;
232  for (i = 0; i < color_packets; i++) {
233  /* first byte is how many colors to skip */
234  palette_ptr += bytestream2_get_byte(&g2);
235 
236  /* next byte indicates how many entries to change */
237  color_changes = bytestream2_get_byte(&g2);
238 
239  /* if there are 0 color changes, there are actually 256 */
240  if (color_changes == 0)
241  color_changes = 256;
242 
243  if (bytestream2_tell(&g2) + color_changes * 3 > stream_ptr_after_chunk)
244  break;
245 
246  for (j = 0; j < color_changes; j++) {
247  unsigned int entry;
248 
249  /* wrap around, for good measure */
250  if ((unsigned)palette_ptr >= 256)
251  palette_ptr = 0;
252 
253  r = bytestream2_get_byte(&g2) << color_shift;
254  g = bytestream2_get_byte(&g2) << color_shift;
255  b = bytestream2_get_byte(&g2) << color_shift;
256  entry = 0xFFU << 24 | r << 16 | g << 8 | b;
257  if (color_shift == 2)
258  entry |= entry >> 6 & 0x30303;
259  if (s->palette[palette_ptr] != entry)
260  s->new_palette = 1;
261  s->palette[palette_ptr++] = entry;
262  }
263  }
264  break;
265 
266  case FLI_DELTA:
267  y_ptr = 0;
268  compressed_lines = bytestream2_get_le16(&g2);
269  while (compressed_lines > 0) {
270  if (bytestream2_tell(&g2) + 2 > stream_ptr_after_chunk)
271  break;
272  line_packets = bytestream2_get_le16(&g2);
273  if ((line_packets & 0xC000) == 0xC000) {
274  // line skip opcode
275  line_packets = -line_packets;
276  y_ptr += line_packets * s->frame.linesize[0];
277  } else if ((line_packets & 0xC000) == 0x4000) {
278  av_log(avctx, AV_LOG_ERROR, "Undefined opcode (%x) in DELTA_FLI\n", line_packets);
279  } else if ((line_packets & 0xC000) == 0x8000) {
280  // "last byte" opcode
281  pixel_ptr= y_ptr + s->frame.linesize[0] - 1;
282  CHECK_PIXEL_PTR(0);
283  pixels[pixel_ptr] = line_packets & 0xff;
284  } else {
285  compressed_lines--;
286  pixel_ptr = y_ptr;
287  CHECK_PIXEL_PTR(0);
288  pixel_countdown = s->avctx->width;
289  for (i = 0; i < line_packets; i++) {
290  if (bytestream2_tell(&g2) + 2 > stream_ptr_after_chunk)
291  break;
292  /* account for the skip bytes */
293  pixel_skip = bytestream2_get_byte(&g2);
294  pixel_ptr += pixel_skip;
295  pixel_countdown -= pixel_skip;
296  byte_run = sign_extend(bytestream2_get_byte(&g2), 8);
297  if (byte_run < 0) {
298  byte_run = -byte_run;
299  palette_idx1 = bytestream2_get_byte(&g2);
300  palette_idx2 = bytestream2_get_byte(&g2);
301  CHECK_PIXEL_PTR(byte_run * 2);
302  for (j = 0; j < byte_run; j++, pixel_countdown -= 2) {
303  pixels[pixel_ptr++] = palette_idx1;
304  pixels[pixel_ptr++] = palette_idx2;
305  }
306  } else {
307  CHECK_PIXEL_PTR(byte_run * 2);
308  if (bytestream2_tell(&g2) + byte_run * 2 > stream_ptr_after_chunk)
309  break;
310  for (j = 0; j < byte_run * 2; j++, pixel_countdown--) {
311  pixels[pixel_ptr++] = bytestream2_get_byte(&g2);
312  }
313  }
314  }
315 
316  y_ptr += s->frame.linesize[0];
317  }
318  }
319  break;
320 
321  case FLI_LC:
322  /* line compressed */
323  starting_line = bytestream2_get_le16(&g2);
324  y_ptr = 0;
325  y_ptr += starting_line * s->frame.linesize[0];
326 
327  compressed_lines = bytestream2_get_le16(&g2);
328  while (compressed_lines > 0) {
329  pixel_ptr = y_ptr;
330  CHECK_PIXEL_PTR(0);
331  pixel_countdown = s->avctx->width;
332  if (bytestream2_tell(&g2) + 1 > stream_ptr_after_chunk)
333  break;
334  line_packets = bytestream2_get_byte(&g2);
335  if (line_packets > 0) {
336  for (i = 0; i < line_packets; i++) {
337  /* account for the skip bytes */
338  if (bytestream2_tell(&g2) + 1 > stream_ptr_after_chunk)
339  break;
340  pixel_skip = bytestream2_get_byte(&g2);
341  pixel_ptr += pixel_skip;
342  pixel_countdown -= pixel_skip;
343  byte_run = sign_extend(bytestream2_get_byte(&g2),8);
344  if (byte_run > 0) {
345  CHECK_PIXEL_PTR(byte_run);
346  if (bytestream2_tell(&g2) + byte_run > stream_ptr_after_chunk)
347  break;
348  for (j = 0; j < byte_run; j++, pixel_countdown--) {
349  pixels[pixel_ptr++] = bytestream2_get_byte(&g2);
350  }
351  } else if (byte_run < 0) {
352  byte_run = -byte_run;
353  palette_idx1 = bytestream2_get_byte(&g2);
354  CHECK_PIXEL_PTR(byte_run);
355  for (j = 0; j < byte_run; j++, pixel_countdown--) {
356  pixels[pixel_ptr++] = palette_idx1;
357  }
358  }
359  }
360  }
361 
362  y_ptr += s->frame.linesize[0];
363  compressed_lines--;
364  }
365  break;
366 
367  case FLI_BLACK:
368  /* set the whole frame to color 0 (which is usually black) */
369  memset(pixels, 0,
370  s->frame.linesize[0] * s->avctx->height);
371  break;
372 
373  case FLI_BRUN:
374  /* Byte run compression: This chunk type only occurs in the first
375  * FLI frame and it will update the entire frame. */
376  y_ptr = 0;
377  for (lines = 0; lines < s->avctx->height; lines++) {
378  pixel_ptr = y_ptr;
379  /* disregard the line packets; instead, iterate through all
380  * pixels on a row */
381  bytestream2_skip(&g2, 1);
382  pixel_countdown = s->avctx->width;
383  while (pixel_countdown > 0) {
384  if (bytestream2_tell(&g2) + 1 > stream_ptr_after_chunk)
385  break;
386  byte_run = sign_extend(bytestream2_get_byte(&g2), 8);
387  if (!byte_run) {
388  av_log(avctx, AV_LOG_ERROR, "Invalid byte run value.\n");
389  return AVERROR_INVALIDDATA;
390  }
391 
392  if (byte_run > 0) {
393  palette_idx1 = bytestream2_get_byte(&g2);
394  CHECK_PIXEL_PTR(byte_run);
395  for (j = 0; j < byte_run; j++) {
396  pixels[pixel_ptr++] = palette_idx1;
397  pixel_countdown--;
398  if (pixel_countdown < 0)
399  av_log(avctx, AV_LOG_ERROR, "pixel_countdown < 0 (%d) at line %d\n",
400  pixel_countdown, lines);
401  }
402  } else { /* copy bytes if byte_run < 0 */
403  byte_run = -byte_run;
404  CHECK_PIXEL_PTR(byte_run);
405  if (bytestream2_tell(&g2) + byte_run > stream_ptr_after_chunk)
406  break;
407  for (j = 0; j < byte_run; j++) {
408  pixels[pixel_ptr++] = bytestream2_get_byte(&g2);
409  pixel_countdown--;
410  if (pixel_countdown < 0)
411  av_log(avctx, AV_LOG_ERROR, "pixel_countdown < 0 (%d) at line %d\n",
412  pixel_countdown, lines);
413  }
414  }
415  }
416 
417  y_ptr += s->frame.linesize[0];
418  }
419  break;
420 
421  case FLI_COPY:
422  /* copy the chunk (uncompressed frame) */
423  if (chunk_size - 6 != s->avctx->width * s->avctx->height) {
424  av_log(avctx, AV_LOG_ERROR, "In chunk FLI_COPY : source data (%d bytes) " \
425  "has incorrect size, skipping chunk\n", chunk_size - 6);
426  bytestream2_skip(&g2, chunk_size - 6);
427  } else {
428  for (y_ptr = 0; y_ptr < s->frame.linesize[0] * s->avctx->height;
429  y_ptr += s->frame.linesize[0]) {
430  bytestream2_get_buffer(&g2, &pixels[y_ptr],
431  s->avctx->width);
432  }
433  }
434  break;
435 
436  case FLI_MINI:
437  /* some sort of a thumbnail? disregard this chunk... */
438  break;
439 
440  default:
441  av_log(avctx, AV_LOG_ERROR, "Unrecognized chunk type: %d\n", chunk_type);
442  break;
443  }
444 
445  if (stream_ptr_after_chunk - bytestream2_tell(&g2) > 0)
446  bytestream2_skip(&g2, stream_ptr_after_chunk - bytestream2_tell(&g2));
447 
448  frame_size -= chunk_size;
449  num_chunks--;
450  }
451 
452  /* by the end of the chunk, the stream ptr should equal the frame
453  * size (minus 1 or 2, possibly); if it doesn't, issue a warning */
454  if (bytestream2_get_bytes_left(&g2) > 2)
455  av_log(avctx, AV_LOG_ERROR, "Processed FLI chunk where chunk size = %d " \
456  "and final chunk ptr = %d\n", buf_size,
457  buf_size - bytestream2_get_bytes_left(&g2));
458 
459  /* make the palette available on the way out */
460  memcpy(s->frame.data[1], s->palette, AVPALETTE_SIZE);
461  if (s->new_palette) {
462  s->frame.palette_has_changed = 1;
463  s->new_palette = 0;
464  }
465 
466  if ((ret = av_frame_ref(data, &s->frame)) < 0)
467  return ret;
468 
469  *got_frame = 1;
470 
471  return buf_size;
472 }
473 
475  void *data, int *got_frame,
476  const uint8_t *buf, int buf_size)
477 {
478  /* Note, the only difference between the 15Bpp and 16Bpp */
479  /* Format is the pixel format, the packets are processed the same. */
480  FlicDecodeContext *s = avctx->priv_data;
481 
482  GetByteContext g2;
483  int pixel_ptr;
484  unsigned char palette_idx1;
485 
486  unsigned int frame_size;
487  int num_chunks;
488 
489  unsigned int chunk_size;
490  int chunk_type;
491 
492  int i, j, ret;
493 
494  int lines;
495  int compressed_lines;
496  signed short line_packets;
497  int y_ptr;
498  int byte_run;
499  int pixel_skip;
500  int pixel_countdown;
501  unsigned char *pixels;
502  int pixel;
503  unsigned int pixel_limit;
504 
505  bytestream2_init(&g2, buf, buf_size);
506 
507  if ((ret = ff_reget_buffer(avctx, &s->frame)) < 0)
508  return ret;
509 
510  pixels = s->frame.data[0];
511  pixel_limit = s->avctx->height * s->frame.linesize[0];
512 
513  frame_size = bytestream2_get_le32(&g2);
514  bytestream2_skip(&g2, 2); /* skip the magic number */
515  num_chunks = bytestream2_get_le16(&g2);
516  bytestream2_skip(&g2, 8); /* skip padding */
517  if (frame_size > buf_size)
518  frame_size = buf_size;
519 
520  frame_size -= 16;
521 
522  /* iterate through the chunks */
523  while ((frame_size > 0) && (num_chunks > 0) &&
524  bytestream2_get_bytes_left(&g2) >= 4) {
525  int stream_ptr_after_chunk;
526  chunk_size = bytestream2_get_le32(&g2);
527  if (chunk_size > frame_size) {
528  av_log(avctx, AV_LOG_WARNING,
529  "Invalid chunk_size = %u > frame_size = %u\n", chunk_size, frame_size);
530  chunk_size = frame_size;
531  }
532  stream_ptr_after_chunk = bytestream2_tell(&g2) - 4 + chunk_size;
533 
534  chunk_type = bytestream2_get_le16(&g2);
535 
536 
537  switch (chunk_type) {
538  case FLI_256_COLOR:
539  case FLI_COLOR:
540  /* For some reason, it seems that non-palettized flics do
541  * include one of these chunks in their first frame.
542  * Why I do not know, it seems rather extraneous. */
543  av_dlog(avctx,
544  "Unexpected Palette chunk %d in non-palettized FLC\n",
545  chunk_type);
546  bytestream2_skip(&g2, chunk_size - 6);
547  break;
548 
549  case FLI_DELTA:
550  case FLI_DTA_LC:
551  y_ptr = 0;
552  compressed_lines = bytestream2_get_le16(&g2);
553  while (compressed_lines > 0) {
554  if (bytestream2_tell(&g2) + 2 > stream_ptr_after_chunk)
555  break;
556  line_packets = bytestream2_get_le16(&g2);
557  if (line_packets < 0) {
558  line_packets = -line_packets;
559  y_ptr += line_packets * s->frame.linesize[0];
560  } else {
561  compressed_lines--;
562  pixel_ptr = y_ptr;
563  CHECK_PIXEL_PTR(0);
564  pixel_countdown = s->avctx->width;
565  for (i = 0; i < line_packets; i++) {
566  /* account for the skip bytes */
567  if (bytestream2_tell(&g2) + 2 > stream_ptr_after_chunk)
568  break;
569  pixel_skip = bytestream2_get_byte(&g2);
570  pixel_ptr += (pixel_skip*2); /* Pixel is 2 bytes wide */
571  pixel_countdown -= pixel_skip;
572  byte_run = sign_extend(bytestream2_get_byte(&g2), 8);
573  if (byte_run < 0) {
574  byte_run = -byte_run;
575  pixel = bytestream2_get_le16(&g2);
576  CHECK_PIXEL_PTR(2 * byte_run);
577  for (j = 0; j < byte_run; j++, pixel_countdown -= 2) {
578  *((signed short*)(&pixels[pixel_ptr])) = pixel;
579  pixel_ptr += 2;
580  }
581  } else {
582  if (bytestream2_tell(&g2) + 2*byte_run > stream_ptr_after_chunk)
583  break;
584  CHECK_PIXEL_PTR(2 * byte_run);
585  for (j = 0; j < byte_run; j++, pixel_countdown--) {
586  *((signed short*)(&pixels[pixel_ptr])) = bytestream2_get_le16(&g2);
587  pixel_ptr += 2;
588  }
589  }
590  }
591 
592  y_ptr += s->frame.linesize[0];
593  }
594  }
595  break;
596 
597  case FLI_LC:
598  av_log(avctx, AV_LOG_ERROR, "Unexpected FLI_LC chunk in non-palettized FLC\n");
599  bytestream2_skip(&g2, chunk_size - 6);
600  break;
601 
602  case FLI_BLACK:
603  /* set the whole frame to 0x0000 which is black in both 15Bpp and 16Bpp modes. */
604  memset(pixels, 0x0000,
605  s->frame.linesize[0] * s->avctx->height);
606  break;
607 
608  case FLI_BRUN:
609  y_ptr = 0;
610  for (lines = 0; lines < s->avctx->height; lines++) {
611  pixel_ptr = y_ptr;
612  /* disregard the line packets; instead, iterate through all
613  * pixels on a row */
614  bytestream2_skip(&g2, 1);
615  pixel_countdown = (s->avctx->width * 2);
616 
617  while (pixel_countdown > 0) {
618  if (bytestream2_tell(&g2) + 1 > stream_ptr_after_chunk)
619  break;
620  byte_run = sign_extend(bytestream2_get_byte(&g2), 8);
621  if (byte_run > 0) {
622  palette_idx1 = bytestream2_get_byte(&g2);
623  CHECK_PIXEL_PTR(byte_run);
624  for (j = 0; j < byte_run; j++) {
625  pixels[pixel_ptr++] = palette_idx1;
626  pixel_countdown--;
627  if (pixel_countdown < 0)
628  av_log(avctx, AV_LOG_ERROR, "pixel_countdown < 0 (%d) (linea%d)\n",
629  pixel_countdown, lines);
630  }
631  } else { /* copy bytes if byte_run < 0 */
632  byte_run = -byte_run;
633  if (bytestream2_tell(&g2) + byte_run > stream_ptr_after_chunk)
634  break;
635  CHECK_PIXEL_PTR(byte_run);
636  for (j = 0; j < byte_run; j++) {
637  palette_idx1 = bytestream2_get_byte(&g2);
638  pixels[pixel_ptr++] = palette_idx1;
639  pixel_countdown--;
640  if (pixel_countdown < 0)
641  av_log(avctx, AV_LOG_ERROR, "pixel_countdown < 0 (%d) at line %d\n",
642  pixel_countdown, lines);
643  }
644  }
645  }
646 
647  /* Now FLX is strange, in that it is "byte" as opposed to "pixel" run length compressed.
648  * This does not give us any good opportunity to perform word endian conversion
649  * during decompression. So if it is required (i.e., this is not a LE target, we do
650  * a second pass over the line here, swapping the bytes.
651  */
652 #if HAVE_BIGENDIAN
653  pixel_ptr = y_ptr;
654  pixel_countdown = s->avctx->width;
655  while (pixel_countdown > 0) {
656  *((signed short*)(&pixels[pixel_ptr])) = AV_RL16(&buf[pixel_ptr]);
657  pixel_ptr += 2;
658  }
659 #endif
660  y_ptr += s->frame.linesize[0];
661  }
662  break;
663 
664  case FLI_DTA_BRUN:
665  y_ptr = 0;
666  for (lines = 0; lines < s->avctx->height; lines++) {
667  pixel_ptr = y_ptr;
668  /* disregard the line packets; instead, iterate through all
669  * pixels on a row */
670  bytestream2_skip(&g2, 1);
671  pixel_countdown = s->avctx->width; /* Width is in pixels, not bytes */
672 
673  while (pixel_countdown > 0) {
674  if (bytestream2_tell(&g2) + 1 > stream_ptr_after_chunk)
675  break;
676  byte_run = sign_extend(bytestream2_get_byte(&g2), 8);
677  if (byte_run > 0) {
678  pixel = bytestream2_get_le16(&g2);
679  CHECK_PIXEL_PTR(2 * byte_run);
680  for (j = 0; j < byte_run; j++) {
681  *((signed short*)(&pixels[pixel_ptr])) = pixel;
682  pixel_ptr += 2;
683  pixel_countdown--;
684  if (pixel_countdown < 0)
685  av_log(avctx, AV_LOG_ERROR, "pixel_countdown < 0 (%d)\n",
686  pixel_countdown);
687  }
688  } else { /* copy pixels if byte_run < 0 */
689  byte_run = -byte_run;
690  if (bytestream2_tell(&g2) + 2 * byte_run > stream_ptr_after_chunk)
691  break;
692  CHECK_PIXEL_PTR(2 * byte_run);
693  for (j = 0; j < byte_run; j++) {
694  *((signed short*)(&pixels[pixel_ptr])) = bytestream2_get_le16(&g2);
695  pixel_ptr += 2;
696  pixel_countdown--;
697  if (pixel_countdown < 0)
698  av_log(avctx, AV_LOG_ERROR, "pixel_countdown < 0 (%d)\n",
699  pixel_countdown);
700  }
701  }
702  }
703 
704  y_ptr += s->frame.linesize[0];
705  }
706  break;
707 
708  case FLI_COPY:
709  case FLI_DTA_COPY:
710  /* copy the chunk (uncompressed frame) */
711  if (chunk_size - 6 > (unsigned int)(s->avctx->width * s->avctx->height)*2) {
712  av_log(avctx, AV_LOG_ERROR, "In chunk FLI_COPY : source data (%d bytes) " \
713  "bigger than image, skipping chunk\n", chunk_size - 6);
714  bytestream2_skip(&g2, chunk_size - 6);
715  } else {
716 
717  for (y_ptr = 0; y_ptr < s->frame.linesize[0] * s->avctx->height;
718  y_ptr += s->frame.linesize[0]) {
719 
720  pixel_countdown = s->avctx->width;
721  pixel_ptr = 0;
722  while (pixel_countdown > 0) {
723  *((signed short*)(&pixels[y_ptr + pixel_ptr])) = bytestream2_get_le16(&g2);
724  pixel_ptr += 2;
725  pixel_countdown--;
726  }
727  }
728  }
729  break;
730 
731  case FLI_MINI:
732  /* some sort of a thumbnail? disregard this chunk... */
733  bytestream2_skip(&g2, chunk_size - 6);
734  break;
735 
736  default:
737  av_log(avctx, AV_LOG_ERROR, "Unrecognized chunk type: %d\n", chunk_type);
738  break;
739  }
740 
741  frame_size -= chunk_size;
742  num_chunks--;
743  }
744 
745  /* by the end of the chunk, the stream ptr should equal the frame
746  * size (minus 1, possibly); if it doesn't, issue a warning */
747  if ((bytestream2_get_bytes_left(&g2) != 0) && (bytestream2_get_bytes_left(&g2) != 1))
748  av_log(avctx, AV_LOG_ERROR, "Processed FLI chunk where chunk size = %d " \
749  "and final chunk ptr = %d\n", buf_size, bytestream2_tell(&g2));
750 
751  if ((ret = av_frame_ref(data, &s->frame)) < 0)
752  return ret;
753 
754  *got_frame = 1;
755 
756  return buf_size;
757 }
758 
760  void *data, int *got_frame,
761  const uint8_t *buf, int buf_size)
762 {
763  av_log(avctx, AV_LOG_ERROR, "24Bpp FLC Unsupported due to lack of test files.\n");
764  return AVERROR_PATCHWELCOME;
765 }
766 
768  void *data, int *got_frame,
769  AVPacket *avpkt)
770 {
771  const uint8_t *buf = avpkt->data;
772  int buf_size = avpkt->size;
773  if (avctx->pix_fmt == AV_PIX_FMT_PAL8) {
774  return flic_decode_frame_8BPP(avctx, data, got_frame,
775  buf, buf_size);
776  }
777  else if ((avctx->pix_fmt == AV_PIX_FMT_RGB555) ||
778  (avctx->pix_fmt == AV_PIX_FMT_RGB565)) {
779  return flic_decode_frame_15_16BPP(avctx, data, got_frame,
780  buf, buf_size);
781  }
782  else if (avctx->pix_fmt == AV_PIX_FMT_BGR24) {
783  return flic_decode_frame_24BPP(avctx, data, got_frame,
784  buf, buf_size);
785  }
786 
787  /* Should not get here, ever as the pix_fmt is processed */
788  /* in flic_decode_init and the above if should deal with */
789  /* the finite set of possibilites allowable by here. */
790  /* But in case we do, just error out. */
791  av_log(avctx, AV_LOG_ERROR, "Unknown FLC format, my science cannot explain how this happened.\n");
792  return AVERROR_BUG;
793 }
794 
795 
797 {
798  FlicDecodeContext *s = avctx->priv_data;
799 
800  av_frame_unref(&s->frame);
801 
802  return 0;
803 }
804 
806  .name = "flic",
807  .long_name = NULL_IF_CONFIG_SMALL("Autodesk Animator Flic video"),
808  .type = AVMEDIA_TYPE_VIDEO,
809  .id = AV_CODEC_ID_FLIC,
810  .priv_data_size = sizeof(FlicDecodeContext),
814  .capabilities = CODEC_CAP_DR1,
815 };
#define FLI_DTA_COPY
Definition: flicvideo.c:57
AVCodecContext * avctx
Definition: flicvideo.c:73
const char * s
Definition: avisynth_c.h:668
#define AVERROR_PATCHWELCOME
This structure describes decoded (raw) audio or video data.
Definition: frame.h:96
#define FLI_TYPE_CODE
Definition: flicvideo.c:60
#define FLI_MINI
Definition: flicvideo.c:55
#define AV_LOG_WARNING
Something somehow does not look correct.
Definition: avcodec.h:4153
#define CHECK_PIXEL_PTR(n)
Definition: flicvideo.c:65
const char * g
Definition: vf_curves.c:104
static av_cold int init(AVCodecContext *avctx)
Definition: avrndec.c:35
#define AV_RL16(x)
Definition: intreadwrite.h:245
#define FLI_COPY
Definition: flicvideo.c:54
int size
Definition: avcodec.h:1064
const char * b
Definition: vf_curves.c:105
void av_log(void *avcl, int level, const char *fmt,...) av_printf_format(3
Send the specified message to the log if the level is less than or equal to the current av_log_level...
enum AVPixelFormat pix_fmt
Pixel format, see AV_PIX_FMT_xxx.
Definition: avcodec.h:1342
static av_always_inline void bytestream2_init(GetByteContext *g, const uint8_t *buf, int buf_size)
Definition: bytestream.h:131
av_dlog(ac->avr,"%d samples - audio_convert: %s to %s (%s)\n", len, av_get_sample_fmt_name(ac->in_fmt), av_get_sample_fmt_name(ac->out_fmt), use_generic?ac->func_descr_generic:ac->func_descr)
static int flic_decode_frame_15_16BPP(AVCodecContext *avctx, void *data, int *got_frame, const uint8_t *buf, int buf_size)
Definition: flicvideo.c:474
AVCodec.
Definition: avcodec.h:2922
#define av_cold
Definition: avcodec.h:653
uint8_t * extradata
some codecs need / can use extradata like Huffman tables.
Definition: avcodec.h:1254
if((e=av_dict_get(options,"", NULL, AV_DICT_IGNORE_SUFFIX)))
Definition: avfilter.c:965
packed RGB 8:8:8, 24bpp, BGRBGR...
Definition: avcodec.h:4537
static int flic_decode_frame_8BPP(AVCodecContext *avctx, void *data, int *got_frame, const uint8_t *buf, int buf_size)
Definition: flicvideo.c:150
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_PIX_FMT_RGB555
Definition: avcodec.h:4938
#define FLI_COLOR
Definition: flicvideo.c:50
const char * name
Name of the codec implementation.
Definition: avcodec.h:2929
int av_frame_ref(AVFrame *dst, AVFrame *src)
Setup a new reference to the data described by a given frame.
Definition: frame.c:247
#define CODEC_CAP_DR1
Codec uses get_buffer() for allocating buffers and supports custom allocators.
Definition: avcodec.h:742
const char data[16]
Definition: mxf.c:68
#define FLI_LC
Definition: flicvideo.c:51
static const uint8_t frame_size[4]
Definition: g723_1_data.h:58
#define U(x)
Definition: vp56_arith.h:37
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: avcodec.h:4147
#define FLI_BRUN
Definition: flicvideo.c:53
static int flic_decode_frame_24BPP(AVCodecContext *avctx, void *data, int *got_frame, const uint8_t *buf, int buf_size)
Definition: flicvideo.c:759
static av_always_inline void bytestream2_skip(GetByteContext *g, unsigned int size)
Definition: bytestream.h:162
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:151
const char * r
Definition: vf_curves.c:103
static av_always_inline unsigned int bytestream2_get_buffer(GetByteContext *g, uint8_t *dst, unsigned int size)
Definition: bytestream.h:261
static av_always_inline unsigned int bytestream2_get_bytes_left(GetByteContext *g)
Definition: bytestream.h:152
#define FLC_MAGIC_CARPET_SYNTHETIC_TYPE_CODE
Definition: flicvideo.c:63
Libavcodec external API header.
int depth
Definition: v4l.c:61
#define FF_INPUT_BUFFER_PADDING_SIZE
Required number of additionally allocated bytes at the end of the input bitstream for decoding...
Definition: avcodec.h:580
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:986
void av_frame_unref(AVFrame *frame)
Unreference all the buffers referenced by frame and reset the frame fields.
Definition: frame.c:351
#define FLI_DTA_BRUN
Definition: flicvideo.c:56
ret
Definition: avfilter.c:961
int width
picture width / height.
Definition: avcodec.h:1314
#define FLC_FLX_TYPE_CODE
Definition: flicvideo.c:61
#define AVPALETTE_SIZE
Definition: avcodec.h:4499
#define FLI_256_COLOR
Definition: flicvideo.c:48
#define FLI_DELTA
Definition: flicvideo.c:49
static av_always_inline int bytestream2_tell(GetByteContext *g)
Definition: bytestream.h:186
main external API structure.
Definition: avcodec.h:1146
#define AV_PIX_FMT_RGB565
Definition: avcodec.h:4937
static void close(AVCodecParserContext *s)
Definition: h264_parser.c:538
void * buf
Definition: avisynth_c.h:594
#define FLI_DTA_LC
Definition: flicvideo.c:58
int extradata_size
Definition: avcodec.h:1255
void avcodec_get_frame_defaults(AVFrame *frame)
Set the fields of the given AVFrame to default values.
Definition: utils.c:1046
static int flic_decode_frame(AVCodecContext *avctx, void *data, int *got_frame, AVPacket *avpkt)
Definition: flicvideo.c:767
static av_cold int flic_decode_end(AVCodecContext *avctx)
Definition: flicvideo.c:796
uint8_t * data
Definition: avcodec.h:1063
int palette_has_changed
Tell user application that palette has changed from previous frame.
Definition: frame.h:303
int linesize[AV_NUM_DATA_POINTERS]
For video, size in bytes of each picture line.
Definition: frame.h:124
uint8_t pixel
Definition: tiny_ssim.c:40
static av_const int sign_extend(int val, unsigned bits)
Definition: mathops.h:123
void * priv_data
Definition: avcodec.h:1182
#define FLI_BLACK
Definition: flicvideo.c:52
common internal api header.
#define AVERROR_BUG
#define AVERROR_INVALIDDATA
unsigned int palette[256]
Definition: flicvideo.c:76
#define AV_RL32(x)
Definition: intreadwrite.h:275
AVCodec ff_flic_decoder
Definition: flicvideo.c:805
static int decode(AVCodecContext *avctx, void *data, int *got_frame, AVPacket *avpkt)
Definition: crystalhd.c:868
8 bit with PIX_FMT_RGB32 palette
Definition: avcodec.h:4545
This structure stores compressed data.
Definition: avcodec.h:1040
static av_cold int flic_decode_init(AVCodecContext *avctx)
Definition: flicvideo.c:81
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
Definition: frame.h:107