2 * FLI/FLC Animation Video Decoder
3 * Copyright (C) 2003, 2004 The FFmpeg project
5 * This file is part of FFmpeg.
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.
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.
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
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
28 * http://www.compuphase.com/flic.htm
30 * This decoder outputs PAL8/RGB555/RGB565/BGR24. To use this decoder, be
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.
41 #include "libavutil/intreadwrite.h"
43 #include "bytestream.h"
47 #define FLI_256_COLOR 4
55 #define FLI_DTA_BRUN 25
56 #define FLI_DTA_COPY 26
59 #define FLI_TYPE_CODE (0xAF11)
60 #define FLC_FLX_TYPE_CODE (0xAF12)
61 #define FLC_DTA_TYPE_CODE (0xAF44) /* Marks an "Extended FLC" comes from Dave's Targa Animator (DTA) */
62 #define FLC_MAGIC_CARPET_SYNTHETIC_TYPE_CODE (0xAF13)
64 #define CHECK_PIXEL_PTR(n) \
65 if (pixel_ptr + n > pixel_limit) { \
66 av_log (s->avctx, AV_LOG_ERROR, "Invalid pixel_ptr = %d > pixel_limit = %d\n", \
67 pixel_ptr + n, pixel_limit); \
68 return AVERROR_INVALIDDATA; \
71 typedef struct FlicDecodeContext {
72 AVCodecContext *avctx;
75 unsigned int palette[256];
77 int fli_type; /* either 0xAF11 or 0xAF12, affects palette resolution */
80 static av_cold int flic_decode_init(AVCodecContext *avctx)
82 FlicDecodeContext *s = avctx->priv_data;
83 unsigned char *fli_header = (unsigned char *)avctx->extradata;
86 if (avctx->extradata_size != 0 &&
87 avctx->extradata_size != 12 &&
88 avctx->extradata_size != 128 &&
89 avctx->extradata_size != 256 &&
90 avctx->extradata_size != 904 &&
91 avctx->extradata_size != 1024) {
92 av_log(avctx, AV_LOG_ERROR, "Unexpected extradata size %d\n", avctx->extradata_size);
93 return AVERROR_INVALIDDATA;
98 if (s->avctx->extradata_size == 12) {
99 /* special case for magic carpet FLIs */
100 s->fli_type = FLC_MAGIC_CARPET_SYNTHETIC_TYPE_CODE;
102 } else if (avctx->extradata_size == 1024) {
103 uint8_t *ptr = avctx->extradata;
106 for (i = 0; i < 256; i++) {
107 s->palette[i] = AV_RL32(ptr);
111 /* FLI in MOV, see e.g. FFmpeg trac issue #626 */
112 } else if (avctx->extradata_size == 0 ||
113 avctx->extradata_size == 256 ||
114 /* see FFmpeg ticket #1234 */
115 avctx->extradata_size == 904) {
116 s->fli_type = FLI_TYPE_CODE;
119 s->fli_type = AV_RL16(&fli_header[4]);
120 depth = AV_RL16(&fli_header[12]);
124 depth = 8; /* Some FLC generators set depth to zero, when they mean 8Bpp. Fix up here */
127 if ((s->fli_type == FLC_FLX_TYPE_CODE) && (depth == 16)) {
128 depth = 15; /* Original Autodesk FLX's say the depth is 16Bpp when it is really 15Bpp */
132 case 8 : avctx->pix_fmt = AV_PIX_FMT_PAL8; break;
133 case 15 : avctx->pix_fmt = AV_PIX_FMT_RGB555; break;
134 case 16 : avctx->pix_fmt = AV_PIX_FMT_RGB565; break;
135 case 24 : avctx->pix_fmt = AV_PIX_FMT_BGR24; break;
137 av_log(avctx, AV_LOG_ERROR, "Unknown FLC/FLX depth of %d Bpp is unsupported.\n",depth);
138 return AVERROR_INVALIDDATA;
141 s->frame = av_frame_alloc();
143 return AVERROR(ENOMEM);
150 static int flic_decode_frame_8BPP(AVCodecContext *avctx,
151 void *data, int *got_frame,
152 const uint8_t *buf, int buf_size)
154 FlicDecodeContext *s = avctx->priv_data;
159 unsigned char palette_idx1;
160 unsigned char palette_idx2;
162 unsigned int frame_size;
165 unsigned int chunk_size;
173 unsigned char r, g, b;
176 int compressed_lines;
178 signed short line_packets;
183 unsigned char *pixels;
184 unsigned int pixel_limit;
186 bytestream2_init(&g2, buf, buf_size);
188 if ((ret = ff_reget_buffer(avctx, s->frame)) < 0)
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 + AV_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 */
203 return AVERROR_INVALIDDATA;
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;
217 stream_ptr_after_chunk = bytestream2_tell(&g2) - 4 + chunk_size;
219 chunk_type = bytestream2_get_le16(&g2);
221 switch (chunk_type) {
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
228 if ((chunk_type == FLI_256_COLOR) && (s->fli_type != FLC_MAGIC_CARPET_SYNTHETIC_TYPE_CODE))
232 /* set up the palette */
233 color_packets = bytestream2_get_le16(&g2);
235 for (i = 0; i < color_packets; i++) {
236 /* first byte is how many colors to skip */
237 palette_ptr += bytestream2_get_byte(&g2);
239 /* next byte indicates how many entries to change */
240 color_changes = bytestream2_get_byte(&g2);
242 /* if there are 0 color changes, there are actually 256 */
243 if (color_changes == 0)
246 if (bytestream2_tell(&g2) + color_changes * 3 > stream_ptr_after_chunk)
249 for (j = 0; j < color_changes; j++) {
252 /* wrap around, for good measure */
253 if ((unsigned)palette_ptr >= 256)
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)
264 s->palette[palette_ptr++] = entry;
271 compressed_lines = bytestream2_get_le16(&g2);
272 while (compressed_lines > 0) {
273 if (bytestream2_tell(&g2) + 2 > stream_ptr_after_chunk)
275 line_packets = bytestream2_get_le16(&g2);
276 if ((line_packets & 0xC000) == 0xC000) {
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;
286 pixels[pixel_ptr] = line_packets & 0xff;
291 pixel_countdown = s->avctx->width;
292 for (i = 0; i < line_packets; i++) {
293 if (bytestream2_tell(&g2) + 2 > stream_ptr_after_chunk)
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);
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;
310 CHECK_PIXEL_PTR(byte_run * 2);
311 if (bytestream2_tell(&g2) + byte_run * 2 > stream_ptr_after_chunk)
313 for (j = 0; j < byte_run * 2; j++, pixel_countdown--) {
314 pixels[pixel_ptr++] = bytestream2_get_byte(&g2);
319 y_ptr += s->frame->linesize[0];
325 /* line compressed */
326 starting_line = bytestream2_get_le16(&g2);
328 y_ptr += starting_line * s->frame->linesize[0];
330 compressed_lines = bytestream2_get_le16(&g2);
331 while (compressed_lines > 0) {
334 pixel_countdown = s->avctx->width;
335 if (bytestream2_tell(&g2) + 1 > stream_ptr_after_chunk)
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)
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);
348 CHECK_PIXEL_PTR(byte_run);
349 if (bytestream2_tell(&g2) + byte_run > stream_ptr_after_chunk)
351 for (j = 0; j < byte_run; j++, pixel_countdown--) {
352 pixels[pixel_ptr++] = bytestream2_get_byte(&g2);
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;
365 y_ptr += s->frame->linesize[0];
371 /* set the whole frame to color 0 (which is usually black) */
373 s->frame->linesize[0] * s->avctx->height);
377 /* Byte run compression: This chunk type only occurs in the first
378 * FLI frame and it will update the entire frame. */
380 for (lines = 0; lines < s->avctx->height; lines++) {
382 /* disregard the line packets; instead, iterate through all
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)
389 byte_run = sign_extend(bytestream2_get_byte(&g2), 8);
391 av_log(avctx, AV_LOG_ERROR, "Invalid byte run value.\n");
392 return AVERROR_INVALIDDATA;
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;
401 if (pixel_countdown < 0)
402 av_log(avctx, AV_LOG_ERROR, "pixel_countdown < 0 (%d) at line %d\n",
403 pixel_countdown, lines);
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)
410 for (j = 0; j < byte_run; j++) {
411 pixels[pixel_ptr++] = bytestream2_get_byte(&g2);
413 if (pixel_countdown < 0)
414 av_log(avctx, AV_LOG_ERROR, "pixel_countdown < 0 (%d) at line %d\n",
415 pixel_countdown, lines);
420 y_ptr += s->frame->linesize[0];
425 /* copy the chunk (uncompressed frame) */
426 if (chunk_size - 6 != FFALIGN(s->avctx->width, 4) * s->avctx->height) {
427 av_log(avctx, AV_LOG_ERROR, "In chunk FLI_COPY : source data (%d bytes) " \
428 "has incorrect size, skipping chunk\n", chunk_size - 6);
429 bytestream2_skip(&g2, chunk_size - 6);
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],
435 if (s->avctx->width & 3)
436 bytestream2_skip(&g2, 4 - (s->avctx->width & 3));
442 /* some sort of a thumbnail? disregard this chunk... */
446 av_log(avctx, AV_LOG_ERROR, "Unrecognized chunk type: %d\n", chunk_type);
450 if (stream_ptr_after_chunk - bytestream2_tell(&g2) >= 0) {
451 bytestream2_skip(&g2, stream_ptr_after_chunk - bytestream2_tell(&g2));
453 av_log(avctx, AV_LOG_ERROR, "Chunk overread\n");
457 frame_size -= chunk_size;
461 /* by the end of the chunk, the stream ptr should equal the frame
462 * size (minus 1 or 2, possibly); if it doesn't, issue a warning */
463 if (bytestream2_get_bytes_left(&g2) > 2)
464 av_log(avctx, AV_LOG_ERROR, "Processed FLI chunk where chunk size = %d " \
465 "and final chunk ptr = %d\n", buf_size,
466 buf_size - bytestream2_get_bytes_left(&g2));
468 /* make the palette available on the way out */
469 memcpy(s->frame->data[1], s->palette, AVPALETTE_SIZE);
470 if (s->new_palette) {
471 s->frame->palette_has_changed = 1;
475 if ((ret = av_frame_ref(data, s->frame)) < 0)
483 static int flic_decode_frame_15_16BPP(AVCodecContext *avctx,
484 void *data, int *got_frame,
485 const uint8_t *buf, int buf_size)
487 /* Note, the only difference between the 15Bpp and 16Bpp */
488 /* Format is the pixel format, the packets are processed the same. */
489 FlicDecodeContext *s = avctx->priv_data;
493 unsigned char palette_idx1;
495 unsigned int frame_size;
498 unsigned int chunk_size;
504 int compressed_lines;
505 signed short line_packets;
510 unsigned char *pixels;
512 unsigned int pixel_limit;
514 bytestream2_init(&g2, buf, buf_size);
516 if ((ret = ff_reget_buffer(avctx, s->frame)) < 0)
519 pixels = s->frame->data[0];
520 pixel_limit = s->avctx->height * s->frame->linesize[0];
522 frame_size = bytestream2_get_le32(&g2);
523 bytestream2_skip(&g2, 2); /* skip the magic number */
524 num_chunks = bytestream2_get_le16(&g2);
525 bytestream2_skip(&g2, 8); /* skip padding */
526 if (frame_size > buf_size)
527 frame_size = buf_size;
530 return AVERROR_INVALIDDATA;
533 /* iterate through the chunks */
534 while ((frame_size > 0) && (num_chunks > 0) &&
535 bytestream2_get_bytes_left(&g2) >= 4) {
536 int stream_ptr_after_chunk;
537 chunk_size = bytestream2_get_le32(&g2);
538 if (chunk_size > frame_size) {
539 av_log(avctx, AV_LOG_WARNING,
540 "Invalid chunk_size = %u > frame_size = %u\n", chunk_size, frame_size);
541 chunk_size = frame_size;
543 stream_ptr_after_chunk = bytestream2_tell(&g2) - 4 + chunk_size;
545 chunk_type = bytestream2_get_le16(&g2);
548 switch (chunk_type) {
551 /* For some reason, it seems that non-palettized flics do
552 * include one of these chunks in their first frame.
553 * Why I do not know, it seems rather extraneous. */
555 "Unexpected Palette chunk %d in non-palettized FLC\n",
557 bytestream2_skip(&g2, chunk_size - 6);
563 compressed_lines = bytestream2_get_le16(&g2);
564 while (compressed_lines > 0) {
565 if (bytestream2_tell(&g2) + 2 > stream_ptr_after_chunk)
567 line_packets = bytestream2_get_le16(&g2);
568 if (line_packets < 0) {
569 line_packets = -line_packets;
570 y_ptr += line_packets * s->frame->linesize[0];
575 pixel_countdown = s->avctx->width;
576 for (i = 0; i < line_packets; i++) {
577 /* account for the skip bytes */
578 if (bytestream2_tell(&g2) + 2 > stream_ptr_after_chunk)
580 pixel_skip = bytestream2_get_byte(&g2);
581 pixel_ptr += (pixel_skip*2); /* Pixel is 2 bytes wide */
582 pixel_countdown -= pixel_skip;
583 byte_run = sign_extend(bytestream2_get_byte(&g2), 8);
585 byte_run = -byte_run;
586 pixel = bytestream2_get_le16(&g2);
587 CHECK_PIXEL_PTR(2 * byte_run);
588 for (j = 0; j < byte_run; j++, pixel_countdown -= 2) {
589 *((signed short*)(&pixels[pixel_ptr])) = pixel;
593 if (bytestream2_tell(&g2) + 2*byte_run > stream_ptr_after_chunk)
595 CHECK_PIXEL_PTR(2 * byte_run);
596 for (j = 0; j < byte_run; j++, pixel_countdown--) {
597 *((signed short*)(&pixels[pixel_ptr])) = bytestream2_get_le16(&g2);
603 y_ptr += s->frame->linesize[0];
609 av_log(avctx, AV_LOG_ERROR, "Unexpected FLI_LC chunk in non-palettized FLC\n");
610 bytestream2_skip(&g2, chunk_size - 6);
614 /* set the whole frame to 0x0000 which is black in both 15Bpp and 16Bpp modes. */
615 memset(pixels, 0x0000,
616 s->frame->linesize[0] * s->avctx->height);
621 for (lines = 0; lines < s->avctx->height; lines++) {
623 /* disregard the line packets; instead, iterate through all
625 bytestream2_skip(&g2, 1);
626 pixel_countdown = (s->avctx->width * 2);
628 while (pixel_countdown > 0) {
629 if (bytestream2_tell(&g2) + 1 > stream_ptr_after_chunk)
631 byte_run = sign_extend(bytestream2_get_byte(&g2), 8);
633 palette_idx1 = bytestream2_get_byte(&g2);
634 CHECK_PIXEL_PTR(byte_run);
635 for (j = 0; j < byte_run; j++) {
636 pixels[pixel_ptr++] = palette_idx1;
638 if (pixel_countdown < 0)
639 av_log(avctx, AV_LOG_ERROR, "pixel_countdown < 0 (%d) (linea%d)\n",
640 pixel_countdown, lines);
642 } else { /* copy bytes if byte_run < 0 */
643 byte_run = -byte_run;
644 if (bytestream2_tell(&g2) + byte_run > stream_ptr_after_chunk)
646 CHECK_PIXEL_PTR(byte_run);
647 for (j = 0; j < byte_run; j++) {
648 palette_idx1 = bytestream2_get_byte(&g2);
649 pixels[pixel_ptr++] = palette_idx1;
651 if (pixel_countdown < 0)
652 av_log(avctx, AV_LOG_ERROR, "pixel_countdown < 0 (%d) at line %d\n",
653 pixel_countdown, lines);
658 /* Now FLX is strange, in that it is "byte" as opposed to "pixel" run length compressed.
659 * This does not give us any good opportunity to perform word endian conversion
660 * during decompression. So if it is required (i.e., this is not a LE target, we do
661 * a second pass over the line here, swapping the bytes.
665 pixel_countdown = s->avctx->width;
666 while (pixel_countdown > 0) {
667 *((signed short*)(&pixels[pixel_ptr])) = AV_RL16(&buf[pixel_ptr]);
671 y_ptr += s->frame->linesize[0];
677 for (lines = 0; lines < s->avctx->height; lines++) {
679 /* disregard the line packets; instead, iterate through all
681 bytestream2_skip(&g2, 1);
682 pixel_countdown = s->avctx->width; /* Width is in pixels, not bytes */
684 while (pixel_countdown > 0) {
685 if (bytestream2_tell(&g2) + 1 > stream_ptr_after_chunk)
687 byte_run = sign_extend(bytestream2_get_byte(&g2), 8);
689 pixel = bytestream2_get_le16(&g2);
690 CHECK_PIXEL_PTR(2 * byte_run);
691 for (j = 0; j < byte_run; j++) {
692 *((signed short*)(&pixels[pixel_ptr])) = pixel;
695 if (pixel_countdown < 0)
696 av_log(avctx, AV_LOG_ERROR, "pixel_countdown < 0 (%d)\n",
699 } else { /* copy pixels if byte_run < 0 */
700 byte_run = -byte_run;
701 if (bytestream2_tell(&g2) + 2 * byte_run > stream_ptr_after_chunk)
703 CHECK_PIXEL_PTR(2 * byte_run);
704 for (j = 0; j < byte_run; j++) {
705 *((signed short*)(&pixels[pixel_ptr])) = bytestream2_get_le16(&g2);
708 if (pixel_countdown < 0)
709 av_log(avctx, AV_LOG_ERROR, "pixel_countdown < 0 (%d)\n",
715 y_ptr += s->frame->linesize[0];
721 /* copy the chunk (uncompressed frame) */
722 if (chunk_size - 6 > (unsigned int)(FFALIGN(s->avctx->width, 2) * s->avctx->height)*2) {
723 av_log(avctx, AV_LOG_ERROR, "In chunk FLI_COPY : source data (%d bytes) " \
724 "bigger than image, skipping chunk\n", chunk_size - 6);
725 bytestream2_skip(&g2, chunk_size - 6);
728 for (y_ptr = 0; y_ptr < s->frame->linesize[0] * s->avctx->height;
729 y_ptr += s->frame->linesize[0]) {
731 pixel_countdown = s->avctx->width;
733 while (pixel_countdown > 0) {
734 *((signed short*)(&pixels[y_ptr + pixel_ptr])) = bytestream2_get_le16(&g2);
738 if (s->avctx->width & 1)
739 bytestream2_skip(&g2, 2);
745 /* some sort of a thumbnail? disregard this chunk... */
746 bytestream2_skip(&g2, chunk_size - 6);
750 av_log(avctx, AV_LOG_ERROR, "Unrecognized chunk type: %d\n", chunk_type);
754 if (stream_ptr_after_chunk - bytestream2_tell(&g2) >= 0) {
755 bytestream2_skip(&g2, stream_ptr_after_chunk - bytestream2_tell(&g2));
757 av_log(avctx, AV_LOG_ERROR, "Chunk overread\n");
761 frame_size -= chunk_size;
765 /* by the end of the chunk, the stream ptr should equal the frame
766 * size (minus 1, possibly); if it doesn't, issue a warning */
767 if ((bytestream2_get_bytes_left(&g2) != 0) && (bytestream2_get_bytes_left(&g2) != 1))
768 av_log(avctx, AV_LOG_ERROR, "Processed FLI chunk where chunk size = %d " \
769 "and final chunk ptr = %d\n", buf_size, bytestream2_tell(&g2));
771 if ((ret = av_frame_ref(data, s->frame)) < 0)
779 static int flic_decode_frame_24BPP(AVCodecContext *avctx,
780 void *data, int *got_frame,
781 const uint8_t *buf, int buf_size)
783 FlicDecodeContext *s = avctx->priv_data;
787 unsigned char palette_idx1;
789 unsigned int frame_size;
792 unsigned int chunk_size;
798 int compressed_lines;
799 signed short line_packets;
804 unsigned char *pixels;
806 unsigned int pixel_limit;
808 bytestream2_init(&g2, buf, buf_size);
810 if ((ret = ff_reget_buffer(avctx, s->frame)) < 0)
813 pixels = s->frame->data[0];
814 pixel_limit = s->avctx->height * s->frame->linesize[0];
816 frame_size = bytestream2_get_le32(&g2);
817 bytestream2_skip(&g2, 2); /* skip the magic number */
818 num_chunks = bytestream2_get_le16(&g2);
819 bytestream2_skip(&g2, 8); /* skip padding */
820 if (frame_size > buf_size)
821 frame_size = buf_size;
824 return AVERROR_INVALIDDATA;
827 /* iterate through the chunks */
828 while ((frame_size > 0) && (num_chunks > 0) &&
829 bytestream2_get_bytes_left(&g2) >= 4) {
830 int stream_ptr_after_chunk;
831 chunk_size = bytestream2_get_le32(&g2);
832 if (chunk_size > frame_size) {
833 av_log(avctx, AV_LOG_WARNING,
834 "Invalid chunk_size = %u > frame_size = %u\n", chunk_size, frame_size);
835 chunk_size = frame_size;
837 stream_ptr_after_chunk = bytestream2_tell(&g2) - 4 + chunk_size;
839 chunk_type = bytestream2_get_le16(&g2);
842 switch (chunk_type) {
845 /* For some reason, it seems that non-palettized flics do
846 * include one of these chunks in their first frame.
847 * Why I do not know, it seems rather extraneous. */
849 "Unexpected Palette chunk %d in non-palettized FLC\n",
851 bytestream2_skip(&g2, chunk_size - 6);
857 compressed_lines = bytestream2_get_le16(&g2);
858 while (compressed_lines > 0) {
859 if (bytestream2_tell(&g2) + 2 > stream_ptr_after_chunk)
861 line_packets = bytestream2_get_le16(&g2);
862 if (line_packets < 0) {
863 line_packets = -line_packets;
864 y_ptr += line_packets * s->frame->linesize[0];
869 pixel_countdown = s->avctx->width;
870 for (i = 0; i < line_packets; i++) {
871 /* account for the skip bytes */
872 if (bytestream2_tell(&g2) + 2 > stream_ptr_after_chunk)
874 pixel_skip = bytestream2_get_byte(&g2);
875 pixel_ptr += (pixel_skip*3); /* Pixel is 3 bytes wide */
876 pixel_countdown -= pixel_skip;
877 byte_run = sign_extend(bytestream2_get_byte(&g2), 8);
879 byte_run = -byte_run;
880 pixel = bytestream2_get_le24(&g2);
881 CHECK_PIXEL_PTR(3 * byte_run);
882 for (j = 0; j < byte_run; j++, pixel_countdown -= 1) {
883 AV_WL24(&pixels[pixel_ptr], pixel);
887 if (bytestream2_tell(&g2) + 2*byte_run > stream_ptr_after_chunk)
889 CHECK_PIXEL_PTR(2 * byte_run);
890 for (j = 0; j < byte_run; j++, pixel_countdown--) {
891 pixel = bytestream2_get_le24(&g2);
892 AV_WL24(&pixels[pixel_ptr], pixel);
898 y_ptr += s->frame->linesize[0];
904 av_log(avctx, AV_LOG_ERROR, "Unexpected FLI_LC chunk in non-palettized FLC\n");
905 bytestream2_skip(&g2, chunk_size - 6);
909 /* set the whole frame to 0x00 which is black for 24 bit mode. */
911 s->frame->linesize[0] * s->avctx->height);
916 for (lines = 0; lines < s->avctx->height; lines++) {
918 /* disregard the line packets; instead, iterate through all
920 bytestream2_skip(&g2, 1);
921 pixel_countdown = (s->avctx->width * 3);
923 while (pixel_countdown > 0) {
924 if (bytestream2_tell(&g2) + 1 > stream_ptr_after_chunk)
926 byte_run = sign_extend(bytestream2_get_byte(&g2), 8);
928 palette_idx1 = bytestream2_get_byte(&g2);
929 CHECK_PIXEL_PTR(byte_run);
930 for (j = 0; j < byte_run; j++) {
931 pixels[pixel_ptr++] = palette_idx1;
933 if (pixel_countdown < 0)
934 av_log(avctx, AV_LOG_ERROR, "pixel_countdown < 0 (%d) (linea%d)\n",
935 pixel_countdown, lines);
937 } else { /* copy bytes if byte_run < 0 */
938 byte_run = -byte_run;
939 if (bytestream2_tell(&g2) + byte_run > stream_ptr_after_chunk)
941 CHECK_PIXEL_PTR(byte_run);
942 for (j = 0; j < byte_run; j++) {
943 palette_idx1 = bytestream2_get_byte(&g2);
944 pixels[pixel_ptr++] = palette_idx1;
946 if (pixel_countdown < 0)
947 av_log(avctx, AV_LOG_ERROR, "pixel_countdown < 0 (%d) at line %d\n",
948 pixel_countdown, lines);
953 y_ptr += s->frame->linesize[0];
959 for (lines = 0; lines < s->avctx->height; lines++) {
961 /* disregard the line packets; instead, iterate through all
963 bytestream2_skip(&g2, 1);
964 pixel_countdown = s->avctx->width; /* Width is in pixels, not bytes */
966 while (pixel_countdown > 0) {
967 if (bytestream2_tell(&g2) + 1 > stream_ptr_after_chunk)
969 byte_run = sign_extend(bytestream2_get_byte(&g2), 8);
971 pixel = bytestream2_get_le24(&g2);
972 CHECK_PIXEL_PTR(3 * byte_run);
973 for (j = 0; j < byte_run; j++) {
974 AV_WL24(pixels + pixel_ptr, pixel);
977 if (pixel_countdown < 0)
978 av_log(avctx, AV_LOG_ERROR, "pixel_countdown < 0 (%d)\n",
981 } else { /* copy pixels if byte_run < 0 */
982 byte_run = -byte_run;
983 if (bytestream2_tell(&g2) + 3 * byte_run > stream_ptr_after_chunk)
985 CHECK_PIXEL_PTR(3 * byte_run);
986 for (j = 0; j < byte_run; j++) {
987 pixel = bytestream2_get_le24(&g2);
988 AV_WL24(pixels + pixel_ptr, pixel);
991 if (pixel_countdown < 0)
992 av_log(avctx, AV_LOG_ERROR, "pixel_countdown < 0 (%d)\n",
998 y_ptr += s->frame->linesize[0];
1004 /* copy the chunk (uncompressed frame) */
1005 if (chunk_size - 6 > (unsigned int)(FFALIGN(s->avctx->width, 2) * s->avctx->height)*3) {
1006 av_log(avctx, AV_LOG_ERROR, "In chunk FLI_COPY : source data (%d bytes) " \
1007 "bigger than image, skipping chunk\n", chunk_size - 6);
1008 bytestream2_skip(&g2, chunk_size - 6);
1010 for (y_ptr = 0; y_ptr < s->frame->linesize[0] * s->avctx->height;
1011 y_ptr += s->frame->linesize[0]) {
1013 pixel_countdown = s->avctx->width;
1015 while (pixel_countdown > 0) {
1016 pixel = bytestream2_get_le24(&g2);
1017 AV_WL24(&pixels[y_ptr + pixel_ptr], pixel);
1021 if (s->avctx->width & 1)
1022 bytestream2_skip(&g2, 3);
1028 /* some sort of a thumbnail? disregard this chunk... */
1029 bytestream2_skip(&g2, chunk_size - 6);
1033 av_log(avctx, AV_LOG_ERROR, "Unrecognized chunk type: %d\n", chunk_type);
1037 if (stream_ptr_after_chunk - bytestream2_tell(&g2) >= 0) {
1038 bytestream2_skip(&g2, stream_ptr_after_chunk - bytestream2_tell(&g2));
1040 av_log(avctx, AV_LOG_ERROR, "Chunk overread\n");
1044 frame_size -= chunk_size;
1048 /* by the end of the chunk, the stream ptr should equal the frame
1049 * size (minus 1, possibly); if it doesn't, issue a warning */
1050 if ((bytestream2_get_bytes_left(&g2) != 0) && (bytestream2_get_bytes_left(&g2) != 1))
1051 av_log(avctx, AV_LOG_ERROR, "Processed FLI chunk where chunk size = %d " \
1052 "and final chunk ptr = %d\n", buf_size, bytestream2_tell(&g2));
1054 if ((ret = av_frame_ref(data, s->frame)) < 0)
1062 static int flic_decode_frame(AVCodecContext *avctx,
1063 void *data, int *got_frame,
1066 const uint8_t *buf = avpkt->data;
1067 int buf_size = avpkt->size;
1068 if (avctx->pix_fmt == AV_PIX_FMT_PAL8) {
1069 return flic_decode_frame_8BPP(avctx, data, got_frame,
1071 } else if ((avctx->pix_fmt == AV_PIX_FMT_RGB555) ||
1072 (avctx->pix_fmt == AV_PIX_FMT_RGB565)) {
1073 return flic_decode_frame_15_16BPP(avctx, data, got_frame,
1075 } else if (avctx->pix_fmt == AV_PIX_FMT_BGR24) {
1076 return flic_decode_frame_24BPP(avctx, data, got_frame,
1080 /* Should not get here, ever as the pix_fmt is processed */
1081 /* in flic_decode_init and the above if should deal with */
1082 /* the finite set of possibilities allowable by here. */
1083 /* But in case we do, just error out. */
1084 av_log(avctx, AV_LOG_ERROR, "Unknown FLC format, my science cannot explain how this happened.\n");
1089 static av_cold int flic_decode_end(AVCodecContext *avctx)
1091 FlicDecodeContext *s = avctx->priv_data;
1093 av_frame_free(&s->frame);
1098 AVCodec ff_flic_decoder = {
1100 .long_name = NULL_IF_CONFIG_SMALL("Autodesk Animator Flic video"),
1101 .type = AVMEDIA_TYPE_VIDEO,
1102 .id = AV_CODEC_ID_FLIC,
1103 .priv_data_size = sizeof(FlicDecodeContext),
1104 .init = flic_decode_init,
1105 .close = flic_decode_end,
1106 .decode = flic_decode_frame,
1107 .capabilities = AV_CODEC_CAP_DR1,