support for FLX and DTA extensions in the FLIC format, courtesy of
[libav.git] / libavcodec / flicvideo.c
CommitLineData
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1/*
2 * FLI/FLC Animation Video Decoder
e40f5d3c 3 * Copyright (C) 2003, 2004 the ffmpeg project
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4 *
5 * This library is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU Lesser General Public
7 * License as published by the Free Software Foundation; either
8 * version 2 of the License, or (at your option) any later version.
9 *
10 * This library is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * Lesser General Public License for more details.
14 *
15 * You should have received a copy of the GNU Lesser General Public
16 * License along with this library; if not, write to the Free Software
17 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
18 *
19 */
20
21/**
22 * @file flic.c
23 * Autodesk Animator FLI/FLC Video Decoder
24 * by Mike Melanson (melanson@pcisys.net)
25 * for more information on the .fli/.flc file format and all of its many
26 * variations, visit:
27 * http://www.compuphase.com/flic.htm
28 *
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29 * This decoder outputs PAL8/RGB555/RGB565 and maybe one day RGB24
30 * colorspace data, depending on the FLC. To use this decoder, be
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31 * sure that your demuxer sends the FLI file header to the decoder via
32 * the extradata chunk in AVCodecContext. The chunk should be 128 bytes
33 * large. The only exception is for FLI files from the game "Magic Carpet",
34 * in which the header is only 12 bytes.
35 */
36
37#include <stdio.h>
38#include <stdlib.h>
39#include <string.h>
40#include <unistd.h>
41
42#include "common.h"
43#include "avcodec.h"
44#include "bswap.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
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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)
42cad81a 62
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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
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70typedef struct FlicDecodeContext {
71 AVCodecContext *avctx;
72 AVFrame frame;
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73
74 unsigned int palette[256];
75 int new_palette;
76 int fli_type; /* either 0xAF11 or 0xAF12, affects palette resolution */
77} FlicDecodeContext;
78
79static int flic_decode_init(AVCodecContext *avctx)
80{
81 FlicDecodeContext *s = (FlicDecodeContext *)avctx->priv_data;
82 unsigned char *fli_header = (unsigned char *)avctx->extradata;
515ae476 83 int depth;
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84
85 s->avctx = avctx;
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86 avctx->has_b_frames = 0;
87
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88 s->fli_type = LE_16(&fli_header[4]); /* Might be overridden if a Magic Carpet FLC */
89 depth = LE_16(&fli_header[12]);
90
91 if (depth == 0) {
92 depth = 8; /* Some FLC generators set depth to zero, when they mean 8Bpp. Fix up here */
93 }
94
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95 if (s->avctx->extradata_size == 12) {
96 /* special case for magic carpet FLIs */
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97 s->fli_type = FLC_MAGIC_CARPET_SYNTHETIC_TYPE_CODE;
98 } else if (s->avctx->extradata_size != 128) {
e40f5d3c 99 av_log(avctx, AV_LOG_ERROR, "Expected extradata of 12 or 128 bytes\n");
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100 return -1;
101 }
102
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103 if ((s->fli_type == FLC_FLX_TYPE_CODE) && (depth == 16)) {
104 depth = 15; /* Original Autodesk FLX's say the depth is 16Bpp when it is really 15Bpp */
105 }
106
107 switch (depth) {
108 case 8 : avctx->pix_fmt = PIX_FMT_PAL8; break;
109 case 15 : avctx->pix_fmt = PIX_FMT_RGB555; break;
110 case 16 : avctx->pix_fmt = PIX_FMT_RGB565; break;
111 case 24 : avctx->pix_fmt = PIX_FMT_BGR24; /* Supposedly BGR, but havent any files to test with */
112 av_log(avctx, AV_LOG_ERROR, "24Bpp FLC/FLX is unsupported due to no test files.\n");
113 return -1;
114 break;
115 default :
116 av_log(avctx, AV_LOG_ERROR, "Unkown FLC/FLX depth of %d Bpp is unsupported.\n",depth);
117 return -1;
118 }
119
e40f5d3c 120 s->frame.data[0] = NULL;
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121 s->new_palette = 0;
122
123 return 0;
124}
125
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126static int flic_decode_frame_8BPP(AVCodecContext *avctx,
127 void *data, int *data_size,
128 uint8_t *buf, int buf_size)
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129{
130 FlicDecodeContext *s = (FlicDecodeContext *)avctx->priv_data;
131
132 int stream_ptr = 0;
133 int stream_ptr_after_color_chunk;
134 int pixel_ptr;
135 int palette_ptr;
136 unsigned char palette_idx1;
137 unsigned char palette_idx2;
138
139 unsigned int frame_size;
140 int num_chunks;
141
142 unsigned int chunk_size;
143 int chunk_type;
144
145 int i, j;
146
147 int color_packets;
148 int color_changes;
149 int color_shift;
150 unsigned char r, g, b;
151
152 int lines;
153 int compressed_lines;
154 int starting_line;
155 signed short line_packets;
156 int y_ptr;
157 signed char byte_run;
158 int pixel_skip;
159 int pixel_countdown;
42cad81a 160 unsigned char *pixels;
3c8c94b4 161 int pixel_limit;
515ae476 162
42cad81a 163 s->frame.reference = 1;
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164 s->frame.buffer_hints = FF_BUFFER_HINTS_VALID | FF_BUFFER_HINTS_PRESERVE | FF_BUFFER_HINTS_REUSABLE;
165 if (avctx->reget_buffer(avctx, &s->frame) < 0) {
166 av_log(avctx, AV_LOG_ERROR, "reget_buffer() failed\n");
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167 return -1;
168 }
169
170 pixels = s->frame.data[0];
3c8c94b4 171 pixel_limit = s->avctx->height * s->frame.linesize[0];
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172
173 frame_size = LE_32(&buf[stream_ptr]);
174 stream_ptr += 6; /* skip the magic number */
175 num_chunks = LE_16(&buf[stream_ptr]);
176 stream_ptr += 10; /* skip padding */
177
178 frame_size -= 16;
179
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180 /* iterate through the chunks */
181 while ((frame_size > 0) && (num_chunks > 0)) {
182 chunk_size = LE_32(&buf[stream_ptr]);
183 stream_ptr += 4;
184 chunk_type = LE_16(&buf[stream_ptr]);
185 stream_ptr += 2;
186
187 switch (chunk_type) {
188 case FLI_256_COLOR:
189 case FLI_COLOR:
190 stream_ptr_after_color_chunk = stream_ptr + chunk_size - 6;
191 s->new_palette = 1;
192
193 /* check special case: If this file is from the Magic Carpet
194 * game and uses 6-bit colors even though it reports 256-color
195 * chunks in a 0xAF12-type file (fli_type is set to 0xAF13 during
196 * initialization) */
515ae476 197 if ((chunk_type == FLI_256_COLOR) && (s->fli_type != FLC_MAGIC_CARPET_SYNTHETIC_TYPE_CODE))
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198 color_shift = 0;
199 else
200 color_shift = 2;
201 /* set up the palette */
202 color_packets = LE_16(&buf[stream_ptr]);
203 stream_ptr += 2;
204 palette_ptr = 0;
205 for (i = 0; i < color_packets; i++) {
206 /* first byte is how many colors to skip */
207 palette_ptr += buf[stream_ptr++];
208
209 /* next byte indicates how many entries to change */
210 color_changes = buf[stream_ptr++];
211
212 /* if there are 0 color changes, there are actually 256 */
213 if (color_changes == 0)
214 color_changes = 256;
215
216 for (j = 0; j < color_changes; j++) {
217
218 /* wrap around, for good measure */
0ecca7a4 219 if ((unsigned)palette_ptr >= 256)
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220 palette_ptr = 0;
221
222 r = buf[stream_ptr++] << color_shift;
223 g = buf[stream_ptr++] << color_shift;
224 b = buf[stream_ptr++] << color_shift;
225 s->palette[palette_ptr++] = (r << 16) | (g << 8) | b;
226 }
227 }
228
229 /* color chunks sometimes have weird 16-bit alignment issues;
230 * therefore, take the hardline approach and set the stream_ptr
231 * to the value calculated w.r.t. the size specified by the color
232 * chunk header */
233 stream_ptr = stream_ptr_after_color_chunk;
234
235 break;
236
237 case FLI_DELTA:
238 y_ptr = 0;
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239 compressed_lines = LE_16(&buf[stream_ptr]);
240 stream_ptr += 2;
241 while (compressed_lines > 0) {
242 line_packets = LE_16(&buf[stream_ptr]);
243 stream_ptr += 2;
244 if (line_packets < 0) {
245 line_packets = -line_packets;
e40f5d3c 246 y_ptr += line_packets * s->frame.linesize[0];
42cad81a 247 } else {
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248 compressed_lines--;
249 pixel_ptr = y_ptr;
250 pixel_countdown = s->avctx->width;
251 for (i = 0; i < line_packets; i++) {
252 /* account for the skip bytes */
253 pixel_skip = buf[stream_ptr++];
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254 pixel_ptr += pixel_skip;
255 pixel_countdown -= pixel_skip;
256 byte_run = buf[stream_ptr++];
257 if (byte_run < 0) {
258 byte_run = -byte_run;
259 palette_idx1 = buf[stream_ptr++];
260 palette_idx2 = buf[stream_ptr++];
3c8c94b4 261 CHECK_PIXEL_PTR(byte_run);
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262 for (j = 0; j < byte_run; j++, pixel_countdown -= 2) {
263 pixels[pixel_ptr++] = palette_idx1;
264 pixels[pixel_ptr++] = palette_idx2;
265 }
266 } else {
3c8c94b4 267 CHECK_PIXEL_PTR(byte_run * 2);
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268 for (j = 0; j < byte_run * 2; j++, pixel_countdown--) {
269 palette_idx1 = buf[stream_ptr++];
270 pixels[pixel_ptr++] = palette_idx1;
271 }
272 }
273 }
274
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275 y_ptr += s->frame.linesize[0];
276 }
277 }
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278 break;
279
280 case FLI_LC:
281 /* line compressed */
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282 starting_line = LE_16(&buf[stream_ptr]);
283 stream_ptr += 2;
42cad81a 284 y_ptr = 0;
e40f5d3c 285 y_ptr += starting_line * s->frame.linesize[0];
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286
287 compressed_lines = LE_16(&buf[stream_ptr]);
288 stream_ptr += 2;
289 while (compressed_lines > 0) {
290 pixel_ptr = y_ptr;
291 pixel_countdown = s->avctx->width;
292 line_packets = buf[stream_ptr++];
293 if (line_packets > 0) {
294 for (i = 0; i < line_packets; i++) {
295 /* account for the skip bytes */
296 pixel_skip = buf[stream_ptr++];
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297 pixel_ptr += pixel_skip;
298 pixel_countdown -= pixel_skip;
299 byte_run = buf[stream_ptr++];
300 if (byte_run > 0) {
3c8c94b4 301 CHECK_PIXEL_PTR(byte_run);
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302 for (j = 0; j < byte_run; j++, pixel_countdown--) {
303 palette_idx1 = buf[stream_ptr++];
304 pixels[pixel_ptr++] = palette_idx1;
305 }
306 } else {
307 byte_run = -byte_run;
308 palette_idx1 = buf[stream_ptr++];
3c8c94b4 309 CHECK_PIXEL_PTR(byte_run);
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310 for (j = 0; j < byte_run; j++, pixel_countdown--) {
311 pixels[pixel_ptr++] = palette_idx1;
312 }
313 }
314 }
315 }
316
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317 y_ptr += s->frame.linesize[0];
318 compressed_lines--;
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319 }
320 break;
321
322 case FLI_BLACK:
323 /* set the whole frame to color 0 (which is usually black) */
324 memset(pixels, 0,
325 s->frame.linesize[0] * s->avctx->height);
326 break;
327
328 case FLI_BRUN:
329 /* Byte run compression: This chunk type only occurs in the first
330 * FLI frame and it will update the entire frame. */
331 y_ptr = 0;
332 for (lines = 0; lines < s->avctx->height; lines++) {
333 pixel_ptr = y_ptr;
334 /* disregard the line packets; instead, iterate through all
335 * pixels on a row */
336 stream_ptr++;
337 pixel_countdown = s->avctx->width;
338 while (pixel_countdown > 0) {
339 byte_run = buf[stream_ptr++];
340 if (byte_run > 0) {
341 palette_idx1 = buf[stream_ptr++];
3c8c94b4 342 CHECK_PIXEL_PTR(byte_run);
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343 for (j = 0; j < byte_run; j++) {
344 pixels[pixel_ptr++] = palette_idx1;
345 pixel_countdown--;
346 if (pixel_countdown < 0)
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347 av_log(avctx, AV_LOG_ERROR, "pixel_countdown < 0 (%d)\n",
348 pixel_countdown);
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349 }
350 } else { /* copy bytes if byte_run < 0 */
351 byte_run = -byte_run;
3c8c94b4 352 CHECK_PIXEL_PTR(byte_run);
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353 for (j = 0; j < byte_run; j++) {
354 palette_idx1 = buf[stream_ptr++];
355 pixels[pixel_ptr++] = palette_idx1;
356 pixel_countdown--;
357 if (pixel_countdown < 0)
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358 av_log(avctx, AV_LOG_ERROR, "pixel_countdown < 0 (%d)\n",
359 pixel_countdown);
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360 }
361 }
362 }
363
364 y_ptr += s->frame.linesize[0];
365 }
366 break;
367
368 case FLI_COPY:
e40f5d3c 369 /* copy the chunk (uncompressed frame) */
42cad81a 370 if (chunk_size - 6 > s->avctx->width * s->avctx->height) {
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371 av_log(avctx, AV_LOG_ERROR, "In chunk FLI_COPY : source data (%d bytes) " \
372 "bigger than image, skipping chunk\n", chunk_size - 6);
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373 stream_ptr += chunk_size - 6;
374 } else {
375 for (y_ptr = 0; y_ptr < s->frame.linesize[0] * s->avctx->height;
376 y_ptr += s->frame.linesize[0]) {
377 memcpy(&pixels[y_ptr], &buf[stream_ptr],
378 s->avctx->width);
379 stream_ptr += s->avctx->width;
380 }
381 }
382 break;
383
384 case FLI_MINI:
385 /* some sort of a thumbnail? disregard this chunk... */
386 stream_ptr += chunk_size - 6;
387 break;
388
389 default:
e40f5d3c 390 av_log(avctx, AV_LOG_ERROR, "Unrecognized chunk type: %d\n", chunk_type);
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391 break;
392 }
393
394 frame_size -= chunk_size;
395 num_chunks--;
396 }
397
398 /* by the end of the chunk, the stream ptr should equal the frame
399 * size (minus 1, possibly); if it doesn't, issue a warning */
400 if ((stream_ptr != buf_size) && (stream_ptr != buf_size - 1))
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401 av_log(avctx, AV_LOG_ERROR, "Processed FLI chunk where chunk size = %d " \
402 "and final chunk ptr = %d\n", buf_size, stream_ptr);
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403
404 /* make the palette available on the way out */
405// if (s->new_palette) {
406 if (1) {
407 memcpy(s->frame.data[1], s->palette, AVPALETTE_SIZE);
408 s->frame.palette_has_changed = 1;
409 s->new_palette = 0;
410 }
411
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412 *data_size=sizeof(AVFrame);
413 *(AVFrame*)data = s->frame;
414
415 return buf_size;
416}
417
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418int flic_decode_frame_15_16BPP(AVCodecContext *avctx,
419 void *data, int *data_size,
420 uint8_t *buf, int buf_size)
421{
422 /* Note, the only difference between the 15Bpp and 16Bpp */
423 /* Format is the pixel format, the packets are processed the same. */
424 FlicDecodeContext *s = (FlicDecodeContext *)avctx->priv_data;
425
426 int stream_ptr = 0;
427 int pixel_ptr;
428 unsigned char palette_idx1;
429
430 unsigned int frame_size;
431 int num_chunks;
432
433 unsigned int chunk_size;
434 int chunk_type;
435
436 int i, j;
437
438 int lines;
439 int compressed_lines;
440 signed short line_packets;
441 int y_ptr;
442 signed char byte_run;
443 int pixel_skip;
444 int pixel_countdown;
445 unsigned char *pixels;
446 int pixel;
447 int pixel_limit;
448
449 s->frame.reference = 1;
450 s->frame.buffer_hints = FF_BUFFER_HINTS_VALID | FF_BUFFER_HINTS_PRESERVE | FF_BUFFER_HINTS_REUSABLE;
451 if (avctx->reget_buffer(avctx, &s->frame) < 0) {
452 av_log(avctx, AV_LOG_ERROR, "reget_buffer() failed\n");
453 return -1;
454 }
455
456 pixels = s->frame.data[0];
457 pixel_limit = s->avctx->height * s->frame.linesize[0];
458
459 frame_size = LE_32(&buf[stream_ptr]);
460 stream_ptr += 6; /* skip the magic number */
461 num_chunks = LE_16(&buf[stream_ptr]);
462 stream_ptr += 10; /* skip padding */
463
464 frame_size -= 16;
465
466 /* iterate through the chunks */
467 while ((frame_size > 0) && (num_chunks > 0)) {
468 chunk_size = LE_32(&buf[stream_ptr]);
469 stream_ptr += 4;
470 chunk_type = LE_16(&buf[stream_ptr]);
471 stream_ptr += 2;
472
473 switch (chunk_type) {
474 case FLI_256_COLOR:
475 case FLI_COLOR:
476 /* For some reason, it seems that non-paletised flics do include one of these */
477 /* chunks in their first frame. Why i do not know, it seems rather extraneous */
478/* av_log(avctx, AV_LOG_ERROR, "Unexpected Palette chunk %d in non-paletised FLC\n",chunk_type);*/
479 stream_ptr = stream_ptr + chunk_size - 6;
480 break;
481
482 case FLI_DELTA:
483 case FLI_DTA_LC:
484 y_ptr = 0;
485 compressed_lines = LE_16(&buf[stream_ptr]);
486 stream_ptr += 2;
487 while (compressed_lines > 0) {
488 line_packets = LE_16(&buf[stream_ptr]);
489 stream_ptr += 2;
490 if (line_packets < 0) {
491 line_packets = -line_packets;
492 y_ptr += line_packets * s->frame.linesize[0];
493 } else {
494 compressed_lines--;
495 pixel_ptr = y_ptr;
496 pixel_countdown = s->avctx->width;
497 for (i = 0; i < line_packets; i++) {
498 /* account for the skip bytes */
499 pixel_skip = buf[stream_ptr++];
500 pixel_ptr += (pixel_skip*2); /* Pixel is 2 bytes wide */
501 pixel_countdown -= pixel_skip;
502 byte_run = buf[stream_ptr++];
503 if (byte_run < 0) {
504 byte_run = -byte_run;
505 pixel = LE_16(&buf[stream_ptr]);
506 stream_ptr += 2;
507 CHECK_PIXEL_PTR(byte_run);
508 for (j = 0; j < byte_run; j++, pixel_countdown -= 2) {
509 *((signed short*)(&pixels[pixel_ptr])) = pixel;
510 pixel_ptr += 2;
511 }
512 } else {
513 CHECK_PIXEL_PTR(byte_run);
514 for (j = 0; j < byte_run; j++, pixel_countdown--) {
515 *((signed short*)(&pixels[pixel_ptr])) = LE_16(&buf[stream_ptr]);
516 stream_ptr += 2;
517 pixel_ptr += 2;
518 }
519 }
520 }
521
522 y_ptr += s->frame.linesize[0];
523 }
524 }
525 break;
526
527 case FLI_LC:
528 av_log(avctx, AV_LOG_ERROR, "Unexpected FLI_LC chunk in non-paletised FLC\n");
529 stream_ptr = stream_ptr + chunk_size - 6;
530 break;
531
532 case FLI_BLACK:
533 /* set the whole frame to 0x0000 which is balck in both 15Bpp and 16Bpp modes. */
534 memset(pixels, 0x0000,
535 s->frame.linesize[0] * s->avctx->height * 2);
536 break;
537
538 case FLI_BRUN:
539 y_ptr = 0;
540 for (lines = 0; lines < s->avctx->height; lines++) {
541 pixel_ptr = y_ptr;
542 /* disregard the line packets; instead, iterate through all
543 * pixels on a row */
544 stream_ptr++;
545 pixel_countdown = (s->avctx->width * 2);
546
547 while (pixel_countdown > 0) {
548 byte_run = buf[stream_ptr++];
549 if (byte_run > 0) {
550 palette_idx1 = buf[stream_ptr++];
551 CHECK_PIXEL_PTR(byte_run);
552 for (j = 0; j < byte_run; j++) {
553 pixels[pixel_ptr++] = palette_idx1;
554 pixel_countdown--;
555 if (pixel_countdown < 0)
556 av_log(avctx, AV_LOG_ERROR, "pixel_countdown < 0 (%d)\n",
557 pixel_countdown);
558 }
559 } else { /* copy bytes if byte_run < 0 */
560 byte_run = -byte_run;
561 CHECK_PIXEL_PTR(byte_run);
562 for (j = 0; j < byte_run; j++) {
563 palette_idx1 = buf[stream_ptr++];
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)\n",
568 pixel_countdown);
569 }
570 }
571 }
572
573 /* Now FLX is strange, in that it is "byte" as opposed to "pixel" run length compressed.
574 * This doesnt give us any good oportunity to perform word endian conversion
575 * during decompression. So if its requried (ie, this isnt a LE target, we do
576 * a second pass over the line here, swapping the bytes.
577 */
578 pixel = 0xFF00;
579 if (0xFF00 != LE_16(&pixel)) /* Check if its not an LE Target */
580 {
581 pixel_ptr = y_ptr;
582 pixel_countdown = s->avctx->width;
583 while (pixel_countdown > 0) {
584 *((signed short*)(&pixels[pixel_ptr])) = LE_16(&buf[pixel_ptr]);
585 pixel_ptr += 2;
586 }
587 }
588 y_ptr += s->frame.linesize[0];
589 }
590 break;
591
592 case FLI_DTA_BRUN:
593 y_ptr = 0;
594 for (lines = 0; lines < s->avctx->height; lines++) {
595 pixel_ptr = y_ptr;
596 /* disregard the line packets; instead, iterate through all
597 * pixels on a row */
598 stream_ptr++;
599 pixel_countdown = s->avctx->width; /* Width is in pixels, not bytes */
600
601 while (pixel_countdown > 0) {
602 byte_run = buf[stream_ptr++];
603 if (byte_run > 0) {
604 pixel = LE_16(&buf[stream_ptr]);
605 stream_ptr += 2;
606 CHECK_PIXEL_PTR(byte_run);
607 for (j = 0; j < byte_run; j++) {
608 *((signed short*)(&pixels[pixel_ptr])) = pixel;
609 pixel_ptr += 2;
610 pixel_countdown--;
611 if (pixel_countdown < 0)
612 av_log(avctx, AV_LOG_ERROR, "pixel_countdown < 0 (%d)\n",
613 pixel_countdown);
614 }
615 } else { /* copy pixels if byte_run < 0 */
616 byte_run = -byte_run;
617 CHECK_PIXEL_PTR(byte_run);
618 for (j = 0; j < byte_run; j++) {
619 *((signed short*)(&pixels[pixel_ptr])) = LE_16(&buf[stream_ptr]);
620 stream_ptr += 2;
621 pixel_ptr += 2;
622 pixel_countdown--;
623 if (pixel_countdown < 0)
624 av_log(avctx, AV_LOG_ERROR, "pixel_countdown < 0 (%d)\n",
625 pixel_countdown);
626 }
627 }
628 }
629
630 y_ptr += s->frame.linesize[0];
631 }
632 break;
633
634 case FLI_COPY:
635 case FLI_DTA_COPY:
636 /* copy the chunk (uncompressed frame) */
637 if (chunk_size - 6 > (unsigned int)(s->avctx->width * s->avctx->height)*2) {
638 av_log(avctx, AV_LOG_ERROR, "In chunk FLI_COPY : source data (%d bytes) " \
639 "bigger than image, skipping chunk\n", chunk_size - 6);
640 stream_ptr += chunk_size - 6;
641 } else {
642
643 for (y_ptr = 0; y_ptr < s->frame.linesize[0] * s->avctx->height;
644 y_ptr += s->frame.linesize[0]) {
645
646 pixel_countdown = s->avctx->width;
647 pixel_ptr = 0;
648 while (pixel_countdown > 0) {
649 *((signed short*)(&pixels[y_ptr + pixel_ptr])) = LE_16(&buf[stream_ptr+pixel_ptr]);
650 pixel_ptr += 2;
651 pixel_countdown--;
652 }
653 stream_ptr += s->avctx->width*2;
654 }
655 }
656 break;
657
658 case FLI_MINI:
659 /* some sort of a thumbnail? disregard this chunk... */
660 stream_ptr += chunk_size - 6;
661 break;
662
663 default:
664 av_log(avctx, AV_LOG_ERROR, "Unrecognized chunk type: %d\n", chunk_type);
665 break;
666 }
667
668 frame_size -= chunk_size;
669 num_chunks--;
670 }
671
672 /* by the end of the chunk, the stream ptr should equal the frame
673 * size (minus 1, possibly); if it doesn't, issue a warning */
674 if ((stream_ptr != buf_size) && (stream_ptr != buf_size - 1))
675 av_log(avctx, AV_LOG_ERROR, "Processed FLI chunk where chunk size = %d " \
676 "and final chunk ptr = %d\n", buf_size, stream_ptr);
677
678
679 *data_size=sizeof(AVFrame);
680 *(AVFrame*)data = s->frame;
681
682 return buf_size;
683}
684
685static int flic_decode_frame_24BPP(AVCodecContext *avctx,
686 void *data, int *data_size,
687 uint8_t *buf, int buf_size)
688{
689 av_log(avctx, AV_LOG_ERROR, "24Bpp FLC Unsupported due to lack of test files.\n");
690 return -1;
691}
692
693static int flic_decode_frame(AVCodecContext *avctx,
694 void *data, int *data_size,
695 uint8_t *buf, int buf_size)
696{
697 if (avctx->pix_fmt == PIX_FMT_PAL8) {
698 return flic_decode_frame_8BPP(avctx, data, data_size,
699 buf, buf_size);
700 }
701 else if ((avctx->pix_fmt == PIX_FMT_RGB555) ||
702 (avctx->pix_fmt == PIX_FMT_RGB565)) {
703 return flic_decode_frame_15_16BPP(avctx, data, data_size,
704 buf, buf_size);
705 }
706 else if (avctx->pix_fmt == PIX_FMT_BGR24) {
707 return flic_decode_frame_24BPP(avctx, data, data_size,
708 buf, buf_size);
709 }
710
711 /* Shouldnt get here, ever as the pix_fmt is processed */
712 /* in flic_decode_init and the above if should deal with */
713 /* the finite set of possibilites allowable by here. */
714 /* but in case we do, just error out. */
715 av_log(avctx, AV_LOG_ERROR, "Unknown Format of FLC. My Science cant explain how this happened\n");
716 return -1;
717}
718
719
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720static int flic_decode_end(AVCodecContext *avctx)
721{
722 FlicDecodeContext *s = avctx->priv_data;
723
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724 if (s->frame.data[0])
725 avctx->release_buffer(avctx, &s->frame);
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726
727 return 0;
728}
729
730AVCodec flic_decoder = {
731 "flic",
732 CODEC_TYPE_VIDEO,
733 CODEC_ID_FLIC,
734 sizeof(FlicDecodeContext),
735 flic_decode_init,
736 NULL,
737 flic_decode_end,
738 flic_decode_frame,
739 CODEC_CAP_DR1,
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MM
740 NULL,
741 NULL,
742 NULL,
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743 NULL
744};