d6faa34128e903491173295f7c093b92dd7b2f00
[libav.git] / libavcodec / flicvideo.c
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 flic.c
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 #include <unistd.h>
42
43 #include "libavutil/intreadwrite.h"
44 #include "avcodec.h"
45
46 #define FLI_256_COLOR 4
47 #define FLI_DELTA 7
48 #define FLI_COLOR 11
49 #define FLI_LC 12
50 #define FLI_BLACK 13
51 #define FLI_BRUN 15
52 #define FLI_COPY 16
53 #define FLI_MINI 18
54 #define FLI_DTA_BRUN 25
55 #define FLI_DTA_COPY 26
56 #define FLI_DTA_LC 27
57
58 #define FLI_TYPE_CODE (0xAF11)
59 #define FLC_FLX_TYPE_CODE (0xAF12)
60 #define FLC_DTA_TYPE_CODE (0xAF44) /* Marks an "Extended FLC" comes from Dave's Targa Animator (DTA) */
61 #define FLC_MAGIC_CARPET_SYNTHETIC_TYPE_CODE (0xAF13)
62
63 #define CHECK_PIXEL_PTR(n) \
64 if (pixel_ptr + n > pixel_limit) { \
65 av_log (s->avctx, AV_LOG_INFO, "Problem: pixel_ptr >= pixel_limit (%d >= %d)\n", \
66 pixel_ptr + n, pixel_limit); \
67 return -1; \
68 } \
69
70 typedef struct FlicDecodeContext {
71 AVCodecContext *avctx;
72 AVFrame frame;
73
74 unsigned int palette[256];
75 int new_palette;
76 int fli_type; /* either 0xAF11 or 0xAF12, affects palette resolution */
77 } FlicDecodeContext;
78
79 static av_cold int flic_decode_init(AVCodecContext *avctx)
80 {
81 FlicDecodeContext *s = avctx->priv_data;
82 unsigned char *fli_header = (unsigned char *)avctx->extradata;
83 int depth;
84
85 s->avctx = avctx;
86
87 s->fli_type = AV_RL16(&fli_header[4]); /* Might be overridden if a Magic Carpet FLC */
88
89 depth = 0;
90 if (s->avctx->extradata_size == 12) {
91 /* special case for magic carpet FLIs */
92 s->fli_type = FLC_MAGIC_CARPET_SYNTHETIC_TYPE_CODE;
93 depth = 8;
94 } else if (s->avctx->extradata_size != 128) {
95 av_log(avctx, AV_LOG_ERROR, "Expected extradata of 12 or 128 bytes\n");
96 return -1;
97 } else {
98 depth = AV_RL16(&fli_header[12]);
99 }
100
101 if (depth == 0) {
102 depth = 8; /* Some FLC generators set depth to zero, when they mean 8Bpp. Fix up here */
103 }
104
105 if ((s->fli_type == FLC_FLX_TYPE_CODE) && (depth == 16)) {
106 depth = 15; /* Original Autodesk FLX's say the depth is 16Bpp when it is really 15Bpp */
107 }
108
109 switch (depth) {
110 case 8 : avctx->pix_fmt = PIX_FMT_PAL8; break;
111 case 15 : avctx->pix_fmt = PIX_FMT_RGB555; break;
112 case 16 : avctx->pix_fmt = PIX_FMT_RGB565; break;
113 case 24 : avctx->pix_fmt = PIX_FMT_BGR24; /* Supposedly BGR, but havent any files to test with */
114 av_log(avctx, AV_LOG_ERROR, "24Bpp FLC/FLX is unsupported due to no test files.\n");
115 return -1;
116 break;
117 default :
118 av_log(avctx, AV_LOG_ERROR, "Unknown FLC/FLX depth of %d Bpp is unsupported.\n",depth);
119 return -1;
120 }
121
122 s->frame.data[0] = NULL;
123 s->new_palette = 0;
124
125 return 0;
126 }
127
128 static int flic_decode_frame_8BPP(AVCodecContext *avctx,
129 void *data, int *data_size,
130 const uint8_t *buf, int buf_size)
131 {
132 FlicDecodeContext *s = avctx->priv_data;
133
134 int stream_ptr = 0;
135 int stream_ptr_after_color_chunk;
136 int pixel_ptr;
137 int palette_ptr;
138 unsigned char palette_idx1;
139 unsigned char palette_idx2;
140
141 unsigned int frame_size;
142 int num_chunks;
143
144 unsigned int chunk_size;
145 int chunk_type;
146
147 int i, j;
148
149 int color_packets;
150 int color_changes;
151 int color_shift;
152 unsigned char r, g, b;
153
154 int lines;
155 int compressed_lines;
156 int starting_line;
157 signed short line_packets;
158 int y_ptr;
159 int byte_run;
160 int pixel_skip;
161 int pixel_countdown;
162 unsigned char *pixels;
163 int pixel_limit;
164
165 s->frame.reference = 1;
166 s->frame.buffer_hints = FF_BUFFER_HINTS_VALID | FF_BUFFER_HINTS_PRESERVE | FF_BUFFER_HINTS_REUSABLE;
167 if (avctx->reget_buffer(avctx, &s->frame) < 0) {
168 av_log(avctx, AV_LOG_ERROR, "reget_buffer() failed\n");
169 return -1;
170 }
171
172 pixels = s->frame.data[0];
173 pixel_limit = s->avctx->height * s->frame.linesize[0];
174
175 frame_size = AV_RL32(&buf[stream_ptr]);
176 stream_ptr += 6; /* skip the magic number */
177 num_chunks = AV_RL16(&buf[stream_ptr]);
178 stream_ptr += 10; /* skip padding */
179
180 frame_size -= 16;
181
182 /* iterate through the chunks */
183 while ((frame_size > 0) && (num_chunks > 0)) {
184 chunk_size = AV_RL32(&buf[stream_ptr]);
185 stream_ptr += 4;
186 chunk_type = AV_RL16(&buf[stream_ptr]);
187 stream_ptr += 2;
188
189 switch (chunk_type) {
190 case FLI_256_COLOR:
191 case FLI_COLOR:
192 stream_ptr_after_color_chunk = stream_ptr + chunk_size - 6;
193
194 /* check special case: If this file is from the Magic Carpet
195 * game and uses 6-bit colors even though it reports 256-color
196 * chunks in a 0xAF12-type file (fli_type is set to 0xAF13 during
197 * initialization) */
198 if ((chunk_type == FLI_256_COLOR) && (s->fli_type != FLC_MAGIC_CARPET_SYNTHETIC_TYPE_CODE))
199 color_shift = 0;
200 else
201 color_shift = 2;
202 /* set up the palette */
203 color_packets = AV_RL16(&buf[stream_ptr]);
204 stream_ptr += 2;
205 palette_ptr = 0;
206 for (i = 0; i < color_packets; i++) {
207 /* first byte is how many colors to skip */
208 palette_ptr += buf[stream_ptr++];
209
210 /* next byte indicates how many entries to change */
211 color_changes = buf[stream_ptr++];
212
213 /* if there are 0 color changes, there are actually 256 */
214 if (color_changes == 0)
215 color_changes = 256;
216
217 for (j = 0; j < color_changes; j++) {
218 unsigned int entry;
219
220 /* wrap around, for good measure */
221 if ((unsigned)palette_ptr >= 256)
222 palette_ptr = 0;
223
224 r = buf[stream_ptr++] << color_shift;
225 g = buf[stream_ptr++] << color_shift;
226 b = buf[stream_ptr++] << color_shift;
227 entry = (r << 16) | (g << 8) | b;
228 if (s->palette[palette_ptr] != entry)
229 s->new_palette = 1;
230 s->palette[palette_ptr++] = entry;
231 }
232 }
233
234 /* color chunks sometimes have weird 16-bit alignment issues;
235 * therefore, take the hardline approach and set the stream_ptr
236 * to the value calculated w.r.t. the size specified by the color
237 * chunk header */
238 stream_ptr = stream_ptr_after_color_chunk;
239
240 break;
241
242 case FLI_DELTA:
243 y_ptr = 0;
244 compressed_lines = AV_RL16(&buf[stream_ptr]);
245 stream_ptr += 2;
246 while (compressed_lines > 0) {
247 line_packets = AV_RL16(&buf[stream_ptr]);
248 stream_ptr += 2;
249 if ((line_packets & 0xC000) == 0xC000) {
250 // line skip opcode
251 line_packets = -line_packets;
252 y_ptr += line_packets * s->frame.linesize[0];
253 } else if ((line_packets & 0xC000) == 0x4000) {
254 av_log(avctx, AV_LOG_ERROR, "Undefined opcode (%x) in DELTA_FLI\n", line_packets);
255 } else if ((line_packets & 0xC000) == 0x8000) {
256 // "last byte" opcode
257 pixels[y_ptr + s->frame.linesize[0] - 1] = line_packets & 0xff;
258 } else {
259 compressed_lines--;
260 pixel_ptr = y_ptr;
261 pixel_countdown = s->avctx->width;
262 for (i = 0; i < line_packets; i++) {
263 /* account for the skip bytes */
264 pixel_skip = buf[stream_ptr++];
265 pixel_ptr += pixel_skip;
266 pixel_countdown -= pixel_skip;
267 byte_run = (signed char)(buf[stream_ptr++]);
268 if (byte_run < 0) {
269 byte_run = -byte_run;
270 palette_idx1 = buf[stream_ptr++];
271 palette_idx2 = buf[stream_ptr++];
272 CHECK_PIXEL_PTR(byte_run);
273 for (j = 0; j < byte_run; j++, pixel_countdown -= 2) {
274 pixels[pixel_ptr++] = palette_idx1;
275 pixels[pixel_ptr++] = palette_idx2;
276 }
277 } else {
278 CHECK_PIXEL_PTR(byte_run * 2);
279 for (j = 0; j < byte_run * 2; j++, pixel_countdown--) {
280 palette_idx1 = buf[stream_ptr++];
281 pixels[pixel_ptr++] = palette_idx1;
282 }
283 }
284 }
285
286 y_ptr += s->frame.linesize[0];
287 }
288 }
289 break;
290
291 case FLI_LC:
292 /* line compressed */
293 starting_line = AV_RL16(&buf[stream_ptr]);
294 stream_ptr += 2;
295 y_ptr = 0;
296 y_ptr += starting_line * s->frame.linesize[0];
297
298 compressed_lines = AV_RL16(&buf[stream_ptr]);
299 stream_ptr += 2;
300 while (compressed_lines > 0) {
301 pixel_ptr = y_ptr;
302 pixel_countdown = s->avctx->width;
303 line_packets = buf[stream_ptr++];
304 if (line_packets > 0) {
305 for (i = 0; i < line_packets; i++) {
306 /* account for the skip bytes */
307 pixel_skip = buf[stream_ptr++];
308 pixel_ptr += pixel_skip;
309 pixel_countdown -= pixel_skip;
310 byte_run = (signed char)(buf[stream_ptr++]);
311 if (byte_run > 0) {
312 CHECK_PIXEL_PTR(byte_run);
313 for (j = 0; j < byte_run; j++, pixel_countdown--) {
314 palette_idx1 = buf[stream_ptr++];
315 pixels[pixel_ptr++] = palette_idx1;
316 }
317 } else if (byte_run < 0) {
318 byte_run = -byte_run;
319 palette_idx1 = buf[stream_ptr++];
320 CHECK_PIXEL_PTR(byte_run);
321 for (j = 0; j < byte_run; j++, pixel_countdown--) {
322 pixels[pixel_ptr++] = palette_idx1;
323 }
324 }
325 }
326 }
327
328 y_ptr += s->frame.linesize[0];
329 compressed_lines--;
330 }
331 break;
332
333 case FLI_BLACK:
334 /* set the whole frame to color 0 (which is usually black) */
335 memset(pixels, 0,
336 s->frame.linesize[0] * s->avctx->height);
337 break;
338
339 case FLI_BRUN:
340 /* Byte run compression: This chunk type only occurs in the first
341 * FLI frame and it will update the entire frame. */
342 y_ptr = 0;
343 for (lines = 0; lines < s->avctx->height; lines++) {
344 pixel_ptr = y_ptr;
345 /* disregard the line packets; instead, iterate through all
346 * pixels on a row */
347 stream_ptr++;
348 pixel_countdown = s->avctx->width;
349 while (pixel_countdown > 0) {
350 byte_run = (signed char)(buf[stream_ptr++]);
351 if (byte_run > 0) {
352 palette_idx1 = buf[stream_ptr++];
353 CHECK_PIXEL_PTR(byte_run);
354 for (j = 0; j < byte_run; j++) {
355 pixels[pixel_ptr++] = palette_idx1;
356 pixel_countdown--;
357 if (pixel_countdown < 0)
358 av_log(avctx, AV_LOG_ERROR, "pixel_countdown < 0 (%d) at line %d\n",
359 pixel_countdown, lines);
360 }
361 } else { /* copy bytes if byte_run < 0 */
362 byte_run = -byte_run;
363 CHECK_PIXEL_PTR(byte_run);
364 for (j = 0; j < byte_run; j++) {
365 palette_idx1 = buf[stream_ptr++];
366 pixels[pixel_ptr++] = palette_idx1;
367 pixel_countdown--;
368 if (pixel_countdown < 0)
369 av_log(avctx, AV_LOG_ERROR, "pixel_countdown < 0 (%d) at line %d\n",
370 pixel_countdown, lines);
371 }
372 }
373 }
374
375 y_ptr += s->frame.linesize[0];
376 }
377 break;
378
379 case FLI_COPY:
380 /* copy the chunk (uncompressed frame) */
381 if (chunk_size - 6 > s->avctx->width * s->avctx->height) {
382 av_log(avctx, AV_LOG_ERROR, "In chunk FLI_COPY : source data (%d bytes) " \
383 "bigger than image, skipping chunk\n", chunk_size - 6);
384 stream_ptr += chunk_size - 6;
385 } else {
386 for (y_ptr = 0; y_ptr < s->frame.linesize[0] * s->avctx->height;
387 y_ptr += s->frame.linesize[0]) {
388 memcpy(&pixels[y_ptr], &buf[stream_ptr],
389 s->avctx->width);
390 stream_ptr += s->avctx->width;
391 }
392 }
393 break;
394
395 case FLI_MINI:
396 /* some sort of a thumbnail? disregard this chunk... */
397 stream_ptr += chunk_size - 6;
398 break;
399
400 default:
401 av_log(avctx, AV_LOG_ERROR, "Unrecognized chunk type: %d\n", chunk_type);
402 break;
403 }
404
405 frame_size -= chunk_size;
406 num_chunks--;
407 }
408
409 /* by the end of the chunk, the stream ptr should equal the frame
410 * size (minus 1, possibly); if it doesn't, issue a warning */
411 if ((stream_ptr != buf_size) && (stream_ptr != buf_size - 1))
412 av_log(avctx, AV_LOG_ERROR, "Processed FLI chunk where chunk size = %d " \
413 "and final chunk ptr = %d\n", buf_size, stream_ptr);
414
415 /* make the palette available on the way out */
416 memcpy(s->frame.data[1], s->palette, AVPALETTE_SIZE);
417 if (s->new_palette) {
418 s->frame.palette_has_changed = 1;
419 s->new_palette = 0;
420 }
421
422 *data_size=sizeof(AVFrame);
423 *(AVFrame*)data = s->frame;
424
425 return buf_size;
426 }
427
428 static int flic_decode_frame_15_16BPP(AVCodecContext *avctx,
429 void *data, int *data_size,
430 const uint8_t *buf, int buf_size)
431 {
432 /* Note, the only difference between the 15Bpp and 16Bpp */
433 /* Format is the pixel format, the packets are processed the same. */
434 FlicDecodeContext *s = avctx->priv_data;
435
436 int stream_ptr = 0;
437 int pixel_ptr;
438 unsigned char palette_idx1;
439
440 unsigned int frame_size;
441 int num_chunks;
442
443 unsigned int chunk_size;
444 int chunk_type;
445
446 int i, j;
447
448 int lines;
449 int compressed_lines;
450 signed short line_packets;
451 int y_ptr;
452 int byte_run;
453 int pixel_skip;
454 int pixel_countdown;
455 unsigned char *pixels;
456 int pixel;
457 int pixel_limit;
458
459 s->frame.reference = 1;
460 s->frame.buffer_hints = FF_BUFFER_HINTS_VALID | FF_BUFFER_HINTS_PRESERVE | FF_BUFFER_HINTS_REUSABLE;
461 if (avctx->reget_buffer(avctx, &s->frame) < 0) {
462 av_log(avctx, AV_LOG_ERROR, "reget_buffer() failed\n");
463 return -1;
464 }
465
466 pixels = s->frame.data[0];
467 pixel_limit = s->avctx->height * s->frame.linesize[0];
468
469 frame_size = AV_RL32(&buf[stream_ptr]);
470 stream_ptr += 6; /* skip the magic number */
471 num_chunks = AV_RL16(&buf[stream_ptr]);
472 stream_ptr += 10; /* skip padding */
473
474 frame_size -= 16;
475
476 /* iterate through the chunks */
477 while ((frame_size > 0) && (num_chunks > 0)) {
478 chunk_size = AV_RL32(&buf[stream_ptr]);
479 stream_ptr += 4;
480 chunk_type = AV_RL16(&buf[stream_ptr]);
481 stream_ptr += 2;
482
483 switch (chunk_type) {
484 case FLI_256_COLOR:
485 case FLI_COLOR:
486 /* For some reason, it seems that non-palettized flics do
487 * include one of these chunks in their first frame.
488 * Why I do not know, it seems rather extraneous. */
489 /* av_log(avctx, AV_LOG_ERROR, "Unexpected Palette chunk %d in non-paletised FLC\n",chunk_type);*/
490 stream_ptr = stream_ptr + chunk_size - 6;
491 break;
492
493 case FLI_DELTA:
494 case FLI_DTA_LC:
495 y_ptr = 0;
496 compressed_lines = AV_RL16(&buf[stream_ptr]);
497 stream_ptr += 2;
498 while (compressed_lines > 0) {
499 line_packets = AV_RL16(&buf[stream_ptr]);
500 stream_ptr += 2;
501 if (line_packets < 0) {
502 line_packets = -line_packets;
503 y_ptr += line_packets * s->frame.linesize[0];
504 } else {
505 compressed_lines--;
506 pixel_ptr = y_ptr;
507 pixel_countdown = s->avctx->width;
508 for (i = 0; i < line_packets; i++) {
509 /* account for the skip bytes */
510 pixel_skip = buf[stream_ptr++];
511 pixel_ptr += (pixel_skip*2); /* Pixel is 2 bytes wide */
512 pixel_countdown -= pixel_skip;
513 byte_run = (signed char)(buf[stream_ptr++]);
514 if (byte_run < 0) {
515 byte_run = -byte_run;
516 pixel = AV_RL16(&buf[stream_ptr]);
517 stream_ptr += 2;
518 CHECK_PIXEL_PTR(byte_run);
519 for (j = 0; j < byte_run; j++, pixel_countdown -= 2) {
520 *((signed short*)(&pixels[pixel_ptr])) = pixel;
521 pixel_ptr += 2;
522 }
523 } else {
524 CHECK_PIXEL_PTR(byte_run);
525 for (j = 0; j < byte_run; j++, pixel_countdown--) {
526 *((signed short*)(&pixels[pixel_ptr])) = AV_RL16(&buf[stream_ptr]);
527 stream_ptr += 2;
528 pixel_ptr += 2;
529 }
530 }
531 }
532
533 y_ptr += s->frame.linesize[0];
534 }
535 }
536 break;
537
538 case FLI_LC:
539 av_log(avctx, AV_LOG_ERROR, "Unexpected FLI_LC chunk in non-paletised FLC\n");
540 stream_ptr = stream_ptr + chunk_size - 6;
541 break;
542
543 case FLI_BLACK:
544 /* set the whole frame to 0x0000 which is black in both 15Bpp and 16Bpp modes. */
545 memset(pixels, 0x0000,
546 s->frame.linesize[0] * s->avctx->height);
547 break;
548
549 case FLI_BRUN:
550 y_ptr = 0;
551 for (lines = 0; lines < s->avctx->height; lines++) {
552 pixel_ptr = y_ptr;
553 /* disregard the line packets; instead, iterate through all
554 * pixels on a row */
555 stream_ptr++;
556 pixel_countdown = (s->avctx->width * 2);
557
558 while (pixel_countdown > 0) {
559 byte_run = (signed char)(buf[stream_ptr++]);
560 if (byte_run > 0) {
561 palette_idx1 = buf[stream_ptr++];
562 CHECK_PIXEL_PTR(byte_run);
563 for (j = 0; j < byte_run; j++) {
564 pixels[pixel_ptr++] = palette_idx1;
565 pixel_countdown--;
566 if (pixel_countdown < 0)
567 av_log(avctx, AV_LOG_ERROR, "pixel_countdown < 0 (%d) (linea%d)\n",
568 pixel_countdown, lines);
569 }
570 } else { /* copy bytes if byte_run < 0 */
571 byte_run = -byte_run;
572 CHECK_PIXEL_PTR(byte_run);
573 for (j = 0; j < byte_run; j++) {
574 palette_idx1 = buf[stream_ptr++];
575 pixels[pixel_ptr++] = palette_idx1;
576 pixel_countdown--;
577 if (pixel_countdown < 0)
578 av_log(avctx, AV_LOG_ERROR, "pixel_countdown < 0 (%d) at line %d\n",
579 pixel_countdown, lines);
580 }
581 }
582 }
583
584 /* Now FLX is strange, in that it is "byte" as opposed to "pixel" run length compressed.
585 * This does not give us any good oportunity to perform word endian conversion
586 * during decompression. So if it is required (i.e., this is not a LE target, we do
587 * a second pass over the line here, swapping the bytes.
588 */
589 #ifdef WORDS_BIGENDIAN
590 pixel_ptr = y_ptr;
591 pixel_countdown = s->avctx->width;
592 while (pixel_countdown > 0) {
593 *((signed short*)(&pixels[pixel_ptr])) = AV_RL16(&buf[pixel_ptr]);
594 pixel_ptr += 2;
595 }
596 #endif
597 y_ptr += s->frame.linesize[0];
598 }
599 break;
600
601 case FLI_DTA_BRUN:
602 y_ptr = 0;
603 for (lines = 0; lines < s->avctx->height; lines++) {
604 pixel_ptr = y_ptr;
605 /* disregard the line packets; instead, iterate through all
606 * pixels on a row */
607 stream_ptr++;
608 pixel_countdown = s->avctx->width; /* Width is in pixels, not bytes */
609
610 while (pixel_countdown > 0) {
611 byte_run = (signed char)(buf[stream_ptr++]);
612 if (byte_run > 0) {
613 pixel = AV_RL16(&buf[stream_ptr]);
614 stream_ptr += 2;
615 CHECK_PIXEL_PTR(byte_run);
616 for (j = 0; j < byte_run; j++) {
617 *((signed short*)(&pixels[pixel_ptr])) = pixel;
618 pixel_ptr += 2;
619 pixel_countdown--;
620 if (pixel_countdown < 0)
621 av_log(avctx, AV_LOG_ERROR, "pixel_countdown < 0 (%d)\n",
622 pixel_countdown);
623 }
624 } else { /* copy pixels if byte_run < 0 */
625 byte_run = -byte_run;
626 CHECK_PIXEL_PTR(byte_run);
627 for (j = 0; j < byte_run; j++) {
628 *((signed short*)(&pixels[pixel_ptr])) = AV_RL16(&buf[stream_ptr]);
629 stream_ptr += 2;
630 pixel_ptr += 2;
631 pixel_countdown--;
632 if (pixel_countdown < 0)
633 av_log(avctx, AV_LOG_ERROR, "pixel_countdown < 0 (%d)\n",
634 pixel_countdown);
635 }
636 }
637 }
638
639 y_ptr += s->frame.linesize[0];
640 }
641 break;
642
643 case FLI_COPY:
644 case FLI_DTA_COPY:
645 /* copy the chunk (uncompressed frame) */
646 if (chunk_size - 6 > (unsigned int)(s->avctx->width * s->avctx->height)*2) {
647 av_log(avctx, AV_LOG_ERROR, "In chunk FLI_COPY : source data (%d bytes) " \
648 "bigger than image, skipping chunk\n", chunk_size - 6);
649 stream_ptr += chunk_size - 6;
650 } else {
651
652 for (y_ptr = 0; y_ptr < s->frame.linesize[0] * s->avctx->height;
653 y_ptr += s->frame.linesize[0]) {
654
655 pixel_countdown = s->avctx->width;
656 pixel_ptr = 0;
657 while (pixel_countdown > 0) {
658 *((signed short*)(&pixels[y_ptr + pixel_ptr])) = AV_RL16(&buf[stream_ptr+pixel_ptr]);
659 pixel_ptr += 2;
660 pixel_countdown--;
661 }
662 stream_ptr += s->avctx->width*2;
663 }
664 }
665 break;
666
667 case FLI_MINI:
668 /* some sort of a thumbnail? disregard this chunk... */
669 stream_ptr += chunk_size - 6;
670 break;
671
672 default:
673 av_log(avctx, AV_LOG_ERROR, "Unrecognized chunk type: %d\n", chunk_type);
674 break;
675 }
676
677 frame_size -= chunk_size;
678 num_chunks--;
679 }
680
681 /* by the end of the chunk, the stream ptr should equal the frame
682 * size (minus 1, possibly); if it doesn't, issue a warning */
683 if ((stream_ptr != buf_size) && (stream_ptr != buf_size - 1))
684 av_log(avctx, AV_LOG_ERROR, "Processed FLI chunk where chunk size = %d " \
685 "and final chunk ptr = %d\n", buf_size, stream_ptr);
686
687
688 *data_size=sizeof(AVFrame);
689 *(AVFrame*)data = s->frame;
690
691 return buf_size;
692 }
693
694 static int flic_decode_frame_24BPP(AVCodecContext *avctx,
695 void *data, int *data_size,
696 const uint8_t *buf, int buf_size)
697 {
698 av_log(avctx, AV_LOG_ERROR, "24Bpp FLC Unsupported due to lack of test files.\n");
699 return -1;
700 }
701
702 static int flic_decode_frame(AVCodecContext *avctx,
703 void *data, int *data_size,
704 const uint8_t *buf, int buf_size)
705 {
706 if (avctx->pix_fmt == PIX_FMT_PAL8) {
707 return flic_decode_frame_8BPP(avctx, data, data_size,
708 buf, buf_size);
709 }
710 else if ((avctx->pix_fmt == PIX_FMT_RGB555) ||
711 (avctx->pix_fmt == PIX_FMT_RGB565)) {
712 return flic_decode_frame_15_16BPP(avctx, data, data_size,
713 buf, buf_size);
714 }
715 else if (avctx->pix_fmt == PIX_FMT_BGR24) {
716 return flic_decode_frame_24BPP(avctx, data, data_size,
717 buf, buf_size);
718 }
719
720 /* Should not get here, ever as the pix_fmt is processed */
721 /* in flic_decode_init and the above if should deal with */
722 /* the finite set of possibilites allowable by here. */
723 /* But in case we do, just error out. */
724 av_log(avctx, AV_LOG_ERROR, "Unknown FLC format, my science cannot explain how this happened.\n");
725 return -1;
726 }
727
728
729 static av_cold int flic_decode_end(AVCodecContext *avctx)
730 {
731 FlicDecodeContext *s = avctx->priv_data;
732
733 if (s->frame.data[0])
734 avctx->release_buffer(avctx, &s->frame);
735
736 return 0;
737 }
738
739 AVCodec flic_decoder = {
740 "flic",
741 CODEC_TYPE_VIDEO,
742 CODEC_ID_FLIC,
743 sizeof(FlicDecodeContext),
744 flic_decode_init,
745 NULL,
746 flic_decode_end,
747 flic_decode_frame,
748 CODEC_CAP_DR1,
749 NULL,
750 NULL,
751 NULL,
752 NULL,
753 .long_name = NULL_IF_CONFIG_SMALL("Autodesk Animator Flic video"),
754 };