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flicvideo.c
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1 /*
2  * FLI/FLC Animation Video Decoder
3  * Copyright (c) 2003, 2004 The FFmpeg Project
4  *
5  * This file is part of FFmpeg.
6  *
7  * FFmpeg is free software; you can redistribute it and/or
8  * modify it under the terms of the GNU Lesser General Public
9  * License as published by the Free Software Foundation; either
10  * version 2.1 of the License, or (at your option) any later version.
11  *
12  * FFmpeg is distributed in the hope that it will be useful,
13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15  * Lesser General Public License for more details.
16  *
17  * You should have received a copy of the GNU Lesser General Public
18  * License along with FFmpeg; if not, write to the Free Software
19  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20  */
21 
22 /**
23  * @file
24  * Autodesk Animator FLI/FLC Video Decoder
25  * by Mike Melanson (melanson@pcisys.net)
26  * for more information on the .fli/.flc file format and all of its many
27  * variations, visit:
28  * http://www.compuphase.com/flic.htm
29  *
30  * This decoder outputs PAL8/RGB555/RGB565 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 
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 != s->avctx->width * 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  }
436  }
437  break;
438 
439  case FLI_MINI:
440  /* some sort of a thumbnail? disregard this chunk... */
441  break;
442 
443  default:
444  av_log(avctx, AV_LOG_ERROR, "Unrecognized chunk type: %d\n", chunk_type);
445  break;
446  }
447 
448  if (stream_ptr_after_chunk - bytestream2_tell(&g2) > 0)
449  bytestream2_skip(&g2, stream_ptr_after_chunk - bytestream2_tell(&g2));
450 
451  frame_size -= chunk_size;
452  num_chunks--;
453  }
454 
455  /* by the end of the chunk, the stream ptr should equal the frame
456  * size (minus 1 or 2, possibly); if it doesn't, issue a warning */
457  if (bytestream2_get_bytes_left(&g2) > 2)
458  av_log(avctx, AV_LOG_ERROR, "Processed FLI chunk where chunk size = %d " \
459  "and final chunk ptr = %d\n", buf_size,
460  buf_size - bytestream2_get_bytes_left(&g2));
461 
462  /* make the palette available on the way out */
463  memcpy(s->frame->data[1], s->palette, AVPALETTE_SIZE);
464  if (s->new_palette) {
465  s->frame->palette_has_changed = 1;
466  s->new_palette = 0;
467  }
468 
469  if ((ret = av_frame_ref(data, s->frame)) < 0)
470  return ret;
471 
472  *got_frame = 1;
473 
474  return buf_size;
475 }
476 
478  void *data, int *got_frame,
479  const uint8_t *buf, int buf_size)
480 {
481  /* Note, the only difference between the 15Bpp and 16Bpp */
482  /* Format is the pixel format, the packets are processed the same. */
483  FlicDecodeContext *s = avctx->priv_data;
484 
485  GetByteContext g2;
486  int pixel_ptr;
487  unsigned char palette_idx1;
488 
489  unsigned int frame_size;
490  int num_chunks;
491 
492  unsigned int chunk_size;
493  int chunk_type;
494 
495  int i, j, ret;
496 
497  int lines;
498  int compressed_lines;
499  signed short line_packets;
500  int y_ptr;
501  int byte_run;
502  int pixel_skip;
503  int pixel_countdown;
504  unsigned char *pixels;
505  int pixel;
506  unsigned int pixel_limit;
507 
508  bytestream2_init(&g2, buf, buf_size);
509 
510  if ((ret = ff_reget_buffer(avctx, s->frame)) < 0)
511  return ret;
512 
513  pixels = s->frame->data[0];
514  pixel_limit = s->avctx->height * s->frame->linesize[0];
515 
516  frame_size = bytestream2_get_le32(&g2);
517  bytestream2_skip(&g2, 2); /* skip the magic number */
518  num_chunks = bytestream2_get_le16(&g2);
519  bytestream2_skip(&g2, 8); /* skip padding */
520  if (frame_size > buf_size)
521  frame_size = buf_size;
522 
523  frame_size -= 16;
524 
525  /* iterate through the chunks */
526  while ((frame_size > 0) && (num_chunks > 0) &&
527  bytestream2_get_bytes_left(&g2) >= 4) {
528  int stream_ptr_after_chunk;
529  chunk_size = bytestream2_get_le32(&g2);
530  if (chunk_size > frame_size) {
531  av_log(avctx, AV_LOG_WARNING,
532  "Invalid chunk_size = %u > frame_size = %u\n", chunk_size, frame_size);
533  chunk_size = frame_size;
534  }
535  stream_ptr_after_chunk = bytestream2_tell(&g2) - 4 + chunk_size;
536 
537  chunk_type = bytestream2_get_le16(&g2);
538 
539 
540  switch (chunk_type) {
541  case FLI_256_COLOR:
542  case FLI_COLOR:
543  /* For some reason, it seems that non-palettized flics do
544  * include one of these chunks in their first frame.
545  * Why I do not know, it seems rather extraneous. */
546  ff_dlog(avctx,
547  "Unexpected Palette chunk %d in non-palettized FLC\n",
548  chunk_type);
549  bytestream2_skip(&g2, chunk_size - 6);
550  break;
551 
552  case FLI_DELTA:
553  case FLI_DTA_LC:
554  y_ptr = 0;
555  compressed_lines = bytestream2_get_le16(&g2);
556  while (compressed_lines > 0) {
557  if (bytestream2_tell(&g2) + 2 > stream_ptr_after_chunk)
558  break;
559  line_packets = bytestream2_get_le16(&g2);
560  if (line_packets < 0) {
561  line_packets = -line_packets;
562  y_ptr += line_packets * s->frame->linesize[0];
563  } else {
564  compressed_lines--;
565  pixel_ptr = y_ptr;
566  CHECK_PIXEL_PTR(0);
567  pixel_countdown = s->avctx->width;
568  for (i = 0; i < line_packets; i++) {
569  /* account for the skip bytes */
570  if (bytestream2_tell(&g2) + 2 > stream_ptr_after_chunk)
571  break;
572  pixel_skip = bytestream2_get_byte(&g2);
573  pixel_ptr += (pixel_skip*2); /* Pixel is 2 bytes wide */
574  pixel_countdown -= pixel_skip;
575  byte_run = sign_extend(bytestream2_get_byte(&g2), 8);
576  if (byte_run < 0) {
577  byte_run = -byte_run;
578  pixel = bytestream2_get_le16(&g2);
579  CHECK_PIXEL_PTR(2 * byte_run);
580  for (j = 0; j < byte_run; j++, pixel_countdown -= 2) {
581  *((signed short*)(&pixels[pixel_ptr])) = pixel;
582  pixel_ptr += 2;
583  }
584  } else {
585  if (bytestream2_tell(&g2) + 2*byte_run > stream_ptr_after_chunk)
586  break;
587  CHECK_PIXEL_PTR(2 * byte_run);
588  for (j = 0; j < byte_run; j++, pixel_countdown--) {
589  *((signed short*)(&pixels[pixel_ptr])) = bytestream2_get_le16(&g2);
590  pixel_ptr += 2;
591  }
592  }
593  }
594 
595  y_ptr += s->frame->linesize[0];
596  }
597  }
598  break;
599 
600  case FLI_LC:
601  av_log(avctx, AV_LOG_ERROR, "Unexpected FLI_LC chunk in non-palettized FLC\n");
602  bytestream2_skip(&g2, chunk_size - 6);
603  break;
604 
605  case FLI_BLACK:
606  /* set the whole frame to 0x0000 which is black in both 15Bpp and 16Bpp modes. */
607  memset(pixels, 0x0000,
608  s->frame->linesize[0] * s->avctx->height);
609  break;
610 
611  case FLI_BRUN:
612  y_ptr = 0;
613  for (lines = 0; lines < s->avctx->height; lines++) {
614  pixel_ptr = y_ptr;
615  /* disregard the line packets; instead, iterate through all
616  * pixels on a row */
617  bytestream2_skip(&g2, 1);
618  pixel_countdown = (s->avctx->width * 2);
619 
620  while (pixel_countdown > 0) {
621  if (bytestream2_tell(&g2) + 1 > stream_ptr_after_chunk)
622  break;
623  byte_run = sign_extend(bytestream2_get_byte(&g2), 8);
624  if (byte_run > 0) {
625  palette_idx1 = bytestream2_get_byte(&g2);
626  CHECK_PIXEL_PTR(byte_run);
627  for (j = 0; j < byte_run; j++) {
628  pixels[pixel_ptr++] = palette_idx1;
629  pixel_countdown--;
630  if (pixel_countdown < 0)
631  av_log(avctx, AV_LOG_ERROR, "pixel_countdown < 0 (%d) (linea%d)\n",
632  pixel_countdown, lines);
633  }
634  } else { /* copy bytes if byte_run < 0 */
635  byte_run = -byte_run;
636  if (bytestream2_tell(&g2) + byte_run > stream_ptr_after_chunk)
637  break;
638  CHECK_PIXEL_PTR(byte_run);
639  for (j = 0; j < byte_run; j++) {
640  palette_idx1 = bytestream2_get_byte(&g2);
641  pixels[pixel_ptr++] = palette_idx1;
642  pixel_countdown--;
643  if (pixel_countdown < 0)
644  av_log(avctx, AV_LOG_ERROR, "pixel_countdown < 0 (%d) at line %d\n",
645  pixel_countdown, lines);
646  }
647  }
648  }
649 
650  /* Now FLX is strange, in that it is "byte" as opposed to "pixel" run length compressed.
651  * This does not give us any good opportunity to perform word endian conversion
652  * during decompression. So if it is required (i.e., this is not a LE target, we do
653  * a second pass over the line here, swapping the bytes.
654  */
655 #if HAVE_BIGENDIAN
656  pixel_ptr = y_ptr;
657  pixel_countdown = s->avctx->width;
658  while (pixel_countdown > 0) {
659  *((signed short*)(&pixels[pixel_ptr])) = AV_RL16(&buf[pixel_ptr]);
660  pixel_ptr += 2;
661  }
662 #endif
663  y_ptr += s->frame->linesize[0];
664  }
665  break;
666 
667  case FLI_DTA_BRUN:
668  y_ptr = 0;
669  for (lines = 0; lines < s->avctx->height; lines++) {
670  pixel_ptr = y_ptr;
671  /* disregard the line packets; instead, iterate through all
672  * pixels on a row */
673  bytestream2_skip(&g2, 1);
674  pixel_countdown = s->avctx->width; /* Width is in pixels, not bytes */
675 
676  while (pixel_countdown > 0) {
677  if (bytestream2_tell(&g2) + 1 > stream_ptr_after_chunk)
678  break;
679  byte_run = sign_extend(bytestream2_get_byte(&g2), 8);
680  if (byte_run > 0) {
681  pixel = bytestream2_get_le16(&g2);
682  CHECK_PIXEL_PTR(2 * byte_run);
683  for (j = 0; j < byte_run; j++) {
684  *((signed short*)(&pixels[pixel_ptr])) = pixel;
685  pixel_ptr += 2;
686  pixel_countdown--;
687  if (pixel_countdown < 0)
688  av_log(avctx, AV_LOG_ERROR, "pixel_countdown < 0 (%d)\n",
689  pixel_countdown);
690  }
691  } else { /* copy pixels if byte_run < 0 */
692  byte_run = -byte_run;
693  if (bytestream2_tell(&g2) + 2 * byte_run > stream_ptr_after_chunk)
694  break;
695  CHECK_PIXEL_PTR(2 * byte_run);
696  for (j = 0; j < byte_run; j++) {
697  *((signed short*)(&pixels[pixel_ptr])) = bytestream2_get_le16(&g2);
698  pixel_ptr += 2;
699  pixel_countdown--;
700  if (pixel_countdown < 0)
701  av_log(avctx, AV_LOG_ERROR, "pixel_countdown < 0 (%d)\n",
702  pixel_countdown);
703  }
704  }
705  }
706 
707  y_ptr += s->frame->linesize[0];
708  }
709  break;
710 
711  case FLI_COPY:
712  case FLI_DTA_COPY:
713  /* copy the chunk (uncompressed frame) */
714  if (chunk_size - 6 > (unsigned int)(s->avctx->width * s->avctx->height)*2) {
715  av_log(avctx, AV_LOG_ERROR, "In chunk FLI_COPY : source data (%d bytes) " \
716  "bigger than image, skipping chunk\n", chunk_size - 6);
717  bytestream2_skip(&g2, chunk_size - 6);
718  } else {
719 
720  for (y_ptr = 0; y_ptr < s->frame->linesize[0] * s->avctx->height;
721  y_ptr += s->frame->linesize[0]) {
722 
723  pixel_countdown = s->avctx->width;
724  pixel_ptr = 0;
725  while (pixel_countdown > 0) {
726  *((signed short*)(&pixels[y_ptr + pixel_ptr])) = bytestream2_get_le16(&g2);
727  pixel_ptr += 2;
728  pixel_countdown--;
729  }
730  }
731  }
732  break;
733 
734  case FLI_MINI:
735  /* some sort of a thumbnail? disregard this chunk... */
736  bytestream2_skip(&g2, chunk_size - 6);
737  break;
738 
739  default:
740  av_log(avctx, AV_LOG_ERROR, "Unrecognized chunk type: %d\n", chunk_type);
741  break;
742  }
743 
744  frame_size -= chunk_size;
745  num_chunks--;
746  }
747 
748  /* by the end of the chunk, the stream ptr should equal the frame
749  * size (minus 1, possibly); if it doesn't, issue a warning */
750  if ((bytestream2_get_bytes_left(&g2) != 0) && (bytestream2_get_bytes_left(&g2) != 1))
751  av_log(avctx, AV_LOG_ERROR, "Processed FLI chunk where chunk size = %d " \
752  "and final chunk ptr = %d\n", buf_size, bytestream2_tell(&g2));
753 
754  if ((ret = av_frame_ref(data, s->frame)) < 0)
755  return ret;
756 
757  *got_frame = 1;
758 
759  return buf_size;
760 }
761 
763  void *data, int *got_frame,
764  const uint8_t *buf, int buf_size)
765 {
766  av_log(avctx, AV_LOG_ERROR, "24Bpp FLC Unsupported due to lack of test files.\n");
767  return AVERROR_PATCHWELCOME;
768 }
769 
771  void *data, int *got_frame,
772  AVPacket *avpkt)
773 {
774  const uint8_t *buf = avpkt->data;
775  int buf_size = avpkt->size;
776  if (avctx->pix_fmt == AV_PIX_FMT_PAL8) {
777  return flic_decode_frame_8BPP(avctx, data, got_frame,
778  buf, buf_size);
779  }
780  else if ((avctx->pix_fmt == AV_PIX_FMT_RGB555) ||
781  (avctx->pix_fmt == AV_PIX_FMT_RGB565)) {
782  return flic_decode_frame_15_16BPP(avctx, data, got_frame,
783  buf, buf_size);
784  }
785  else if (avctx->pix_fmt == AV_PIX_FMT_BGR24) {
786  return flic_decode_frame_24BPP(avctx, data, got_frame,
787  buf, buf_size);
788  }
789 
790  /* Should not get here, ever as the pix_fmt is processed */
791  /* in flic_decode_init and the above if should deal with */
792  /* the finite set of possibilites allowable by here. */
793  /* But in case we do, just error out. */
794  av_log(avctx, AV_LOG_ERROR, "Unknown FLC format, my science cannot explain how this happened.\n");
795  return AVERROR_BUG;
796 }
797 
798 
800 {
801  FlicDecodeContext *s = avctx->priv_data;
802 
803  av_frame_free(&s->frame);
804 
805  return 0;
806 }
807 
809  .name = "flic",
810  .long_name = NULL_IF_CONFIG_SMALL("Autodesk Animator Flic video"),
811  .type = AVMEDIA_TYPE_VIDEO,
812  .id = AV_CODEC_ID_FLIC,
813  .priv_data_size = sizeof(FlicDecodeContext),
815  .close = flic_decode_end,
817  .capabilities = AV_CODEC_CAP_DR1,
818 };
#define FLI_DTA_COPY
Definition: flicvideo.c:57
AVCodecContext * avctx
Definition: flicvideo.c:73
const char * s
Definition: avisynth_c.h:631
#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:171
#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:108
static av_cold int init(AVCodecContext *avctx)
Definition: avrndec.c:35
#define FLI_COPY
Definition: flicvideo.c:54
int size
Definition: avcodec.h:1423
const char * b
Definition: vf_curves.c:109
enum AVPixelFormat pix_fmt
Pixel format, see AV_PIX_FMT_xxx.
Definition: avcodec.h:1721
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:477
AVCodec.
Definition: avcodec.h:3473
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.
if()
Definition: avfilter.c:975
uint8_t
#define av_cold
Definition: attributes.h:74
AVFrame * av_frame_alloc(void)
Allocate an AVFrame and set its fields to default values.
Definition: frame.c:135
8 bit with AV_PIX_FMT_RGB32 palette
Definition: pixfmt.h:74
#define AVPALETTE_SIZE
Definition: pixfmt.h:33
#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:363
uint8_t * extradata
some codecs need / can use extradata like Huffman tables.
Definition: avcodec.h:1616
uint8_t * data
Definition: avcodec.h:1422
#define FLI_LC
Definition: flicvideo.c:51
#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:762
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:148
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:175
const char * r
Definition: vf_curves.c:107
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:3480
Libavcodec external API header.
int depth
Definition: v4l.c:61
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:1087
#define FLI_DTA_BRUN
Definition: flicvideo.c:56
ret
Definition: avfilter.c:974
int width
picture width / height.
Definition: avcodec.h:1680
#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:66
#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:1803
#define ff_dlog(ctx,...)
Definition: internal.h:54
int linesize[AV_NUM_DATA_POINTERS]
For video, size in bytes of each picture line.
Definition: frame.h:199
main external API structure.
Definition: avcodec.h:1501
void * buf
Definition: avisynth_c.h:553
#define FLI_DTA_LC
Definition: flicvideo.c:58
int extradata_size
Definition: avcodec.h:1617
#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:770
static av_cold int flic_decode_end(AVCodecContext *avctx)
Definition: flicvideo.c:799
int palette_has_changed
Tell user application that palette has changed from previous frame.
Definition: frame.h:377
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:182
#define FLI_BLACK
Definition: flicvideo.c:52
static int decode(AVCodecContext *avctx, void *data, int *got_sub, AVPacket *avpkt)
Definition: ccaption_dec.c:522
common internal api header.
#define AV_PIX_FMT_RGB555
Definition: pixfmt.h:356
#define AV_INPUT_BUFFER_PADDING_SIZE
Required number of additionally allocated bytes at the end of the input bitstream for decoding...
Definition: avcodec.h:635
void * priv_data
Definition: avcodec.h:1543
int pixels
Definition: avisynth_c.h:298
unsigned int palette[256]
Definition: flicvideo.c:76
AVCodec ff_flic_decoder
Definition: flicvideo.c:808
#define AV_PIX_FMT_RGB565
Definition: pixfmt.h:355
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_RL32
Definition: bytestream.h:87
This structure stores compressed data.
Definition: avcodec.h:1399
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:856