23af5114554e20b68e86c9fc0e6d3f86f9861503
[libav.git] / libavcodec / lcldec.c
1 /*
2 * LCL (LossLess Codec Library) Codec
3 * Copyright (c) 2002-2004 Roberto Togni
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 * LCL (LossLess Codec Library) Video Codec
25 * Decoder for MSZH and ZLIB codecs
26 * Experimental encoder for ZLIB RGB24
27 *
28 * Fourcc: MSZH, ZLIB
29 *
30 * Original Win32 dll:
31 * Ver2.23 By Kenji Oshima 2000.09.20
32 * avimszh.dll, avizlib.dll
33 *
34 * A description of the decoding algorithm can be found here:
35 * http://www.pcisys.net/~melanson/codecs
36 *
37 * Supports: BGR24 (RGB 24bpp)
38 *
39 */
40
41 #include <stdio.h>
42 #include <stdlib.h>
43
44 #include "avcodec.h"
45 #include "bytestream.h"
46 #include "lcl.h"
47 #include "libavutil/lzo.h"
48
49 #if CONFIG_ZLIB_DECODER
50 #include <zlib.h>
51 #endif
52
53 /*
54 * Decoder context
55 */
56 typedef struct LclDecContext {
57 AVFrame pic;
58
59 // Image type
60 int imgtype;
61 // Compression type
62 int compression;
63 // Flags
64 int flags;
65 // Decompressed data size
66 unsigned int decomp_size;
67 // Decompression buffer
68 unsigned char* decomp_buf;
69 #if CONFIG_ZLIB_DECODER
70 z_stream zstream;
71 #endif
72 } LclDecContext;
73
74
75 /**
76 * \param srcptr compressed source buffer, must be padded with at least 5 extra bytes
77 * \param destptr must be padded sufficiently for av_memcpy_backptr
78 */
79 static unsigned int mszh_decomp(const unsigned char * srcptr, int srclen, unsigned char * destptr, unsigned int destsize)
80 {
81 unsigned char *destptr_bak = destptr;
82 unsigned char *destptr_end = destptr + destsize;
83 const unsigned char *srcptr_end = srcptr + srclen;
84 unsigned mask = *srcptr++;
85 unsigned maskbit = 0x80;
86
87 while (srcptr < srcptr_end && destptr < destptr_end) {
88 if (!(mask & maskbit)) {
89 memcpy(destptr, srcptr, 4);
90 destptr += 4;
91 srcptr += 4;
92 } else {
93 unsigned ofs = bytestream_get_le16(&srcptr);
94 unsigned cnt = (ofs >> 11) + 1;
95 ofs &= 0x7ff;
96 ofs = FFMIN(ofs, destptr - destptr_bak);
97 cnt *= 4;
98 cnt = FFMIN(cnt, destptr_end - destptr);
99 av_memcpy_backptr(destptr, ofs, cnt);
100 destptr += cnt;
101 }
102 maskbit >>= 1;
103 if (!maskbit) {
104 mask = *srcptr++;
105 while (!mask) {
106 if (destptr_end - destptr < 32 || srcptr_end - srcptr < 32) break;
107 memcpy(destptr, srcptr, 32);
108 destptr += 32;
109 srcptr += 32;
110 mask = *srcptr++;
111 }
112 maskbit = 0x80;
113 }
114 }
115
116 return destptr - destptr_bak;
117 }
118
119
120 #if CONFIG_ZLIB_DECODER
121 /**
122 * \brief decompress a zlib-compressed data block into decomp_buf
123 * \param src compressed input buffer
124 * \param src_len data length in input buffer
125 * \param offset offset in decomp_buf
126 * \param expected expected decompressed length
127 */
128 static int zlib_decomp(AVCodecContext *avctx, const uint8_t *src, int src_len, int offset, int expected)
129 {
130 LclDecContext *c = avctx->priv_data;
131 int zret = inflateReset(&c->zstream);
132 if (zret != Z_OK) {
133 av_log(avctx, AV_LOG_ERROR, "Inflate reset error: %d\n", zret);
134 return -1;
135 }
136 c->zstream.next_in = src;
137 c->zstream.avail_in = src_len;
138 c->zstream.next_out = c->decomp_buf + offset;
139 c->zstream.avail_out = c->decomp_size - offset;
140 zret = inflate(&c->zstream, Z_FINISH);
141 if (zret != Z_OK && zret != Z_STREAM_END) {
142 av_log(avctx, AV_LOG_ERROR, "Inflate error: %d\n", zret);
143 return -1;
144 }
145 if (expected != (unsigned int)c->zstream.total_out) {
146 av_log(avctx, AV_LOG_ERROR, "Decoded size differs (%d != %lu)\n",
147 expected, c->zstream.total_out);
148 return -1;
149 }
150 return c->zstream.total_out;
151 }
152 #endif
153
154
155 /*
156 *
157 * Decode a frame
158 *
159 */
160 static int decode_frame(AVCodecContext *avctx, void *data, int *data_size, AVPacket *avpkt)
161 {
162 const uint8_t *buf = avpkt->data;
163 int buf_size = avpkt->size;
164 LclDecContext * const c = avctx->priv_data;
165 unsigned char *encoded = (unsigned char *)buf;
166 unsigned int pixel_ptr;
167 int row, col;
168 unsigned char *outptr;
169 uint8_t *y_out, *u_out, *v_out;
170 unsigned int width = avctx->width; // Real image width
171 unsigned int height = avctx->height; // Real image height
172 unsigned int mszh_dlen;
173 unsigned char yq, y1q, uq, vq;
174 int uqvq;
175 unsigned int mthread_inlen, mthread_outlen;
176 unsigned int len = buf_size;
177
178 if(c->pic.data[0])
179 avctx->release_buffer(avctx, &c->pic);
180
181 c->pic.reference = 0;
182 c->pic.buffer_hints = FF_BUFFER_HINTS_VALID;
183 if(avctx->get_buffer(avctx, &c->pic) < 0){
184 av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
185 return -1;
186 }
187
188 outptr = c->pic.data[0]; // Output image pointer
189
190 /* Decompress frame */
191 switch (avctx->codec_id) {
192 case CODEC_ID_MSZH:
193 switch (c->compression) {
194 case COMP_MSZH:
195 if (c->flags & FLAG_MULTITHREAD) {
196 mthread_inlen = AV_RL32(encoded);
197 mthread_inlen = FFMIN(mthread_inlen, len - 8);
198 mthread_outlen = AV_RL32(encoded+4);
199 mthread_outlen = FFMIN(mthread_outlen, c->decomp_size);
200 mszh_dlen = mszh_decomp(encoded + 8, mthread_inlen, c->decomp_buf, c->decomp_size);
201 if (mthread_outlen != mszh_dlen) {
202 av_log(avctx, AV_LOG_ERROR, "Mthread1 decoded size differs (%d != %d)\n",
203 mthread_outlen, mszh_dlen);
204 return -1;
205 }
206 mszh_dlen = mszh_decomp(encoded + 8 + mthread_inlen, len - 8 - mthread_inlen,
207 c->decomp_buf + mthread_outlen, c->decomp_size - mthread_outlen);
208 if (mthread_outlen != mszh_dlen) {
209 av_log(avctx, AV_LOG_ERROR, "Mthread2 decoded size differs (%d != %d)\n",
210 mthread_outlen, mszh_dlen);
211 return -1;
212 }
213 encoded = c->decomp_buf;
214 len = c->decomp_size;
215 } else {
216 mszh_dlen = mszh_decomp(encoded, len, c->decomp_buf, c->decomp_size);
217 if (c->decomp_size != mszh_dlen) {
218 av_log(avctx, AV_LOG_ERROR, "Decoded size differs (%d != %d)\n",
219 c->decomp_size, mszh_dlen);
220 return -1;
221 }
222 encoded = c->decomp_buf;
223 len = mszh_dlen;
224 }
225 break;
226 case COMP_MSZH_NOCOMP:
227 break;
228 default:
229 av_log(avctx, AV_LOG_ERROR, "BUG! Unknown MSZH compression in frame decoder.\n");
230 return -1;
231 }
232 break;
233 #if CONFIG_ZLIB_DECODER
234 case CODEC_ID_ZLIB:
235 /* Using the original dll with normal compression (-1) and RGB format
236 * gives a file with ZLIB fourcc, but frame is really uncompressed.
237 * To be sure that's true check also frame size */
238 if (c->compression == COMP_ZLIB_NORMAL && c->imgtype == IMGTYPE_RGB24 &&
239 len == width * height * 3)
240 break;
241 if (c->flags & FLAG_MULTITHREAD) {
242 int ret;
243 mthread_inlen = AV_RL32(encoded);
244 mthread_inlen = FFMIN(mthread_inlen, len - 8);
245 mthread_outlen = AV_RL32(encoded+4);
246 mthread_outlen = FFMIN(mthread_outlen, c->decomp_size);
247 ret = zlib_decomp(avctx, encoded + 8, mthread_inlen, 0, mthread_outlen);
248 if (ret < 0) return ret;
249 ret = zlib_decomp(avctx, encoded + 8 + mthread_inlen, len - 8 - mthread_inlen,
250 mthread_outlen, mthread_outlen);
251 if (ret < 0) return ret;
252 } else {
253 int ret = zlib_decomp(avctx, encoded, len, 0, c->decomp_size);
254 if (ret < 0) return ret;
255 }
256 encoded = c->decomp_buf;
257 len = c->decomp_size;
258 break;
259 #endif
260 default:
261 av_log(avctx, AV_LOG_ERROR, "BUG! Unknown codec in frame decoder compression switch.\n");
262 return -1;
263 }
264
265
266 /* Apply PNG filter */
267 if (avctx->codec_id == CODEC_ID_ZLIB && (c->flags & FLAG_PNGFILTER)) {
268 switch (c->imgtype) {
269 case IMGTYPE_YUV111:
270 case IMGTYPE_RGB24:
271 for (row = 0; row < height; row++) {
272 pixel_ptr = row * width * 3;
273 yq = encoded[pixel_ptr++];
274 uqvq = AV_RL16(encoded+pixel_ptr);
275 pixel_ptr += 2;
276 for (col = 1; col < width; col++) {
277 encoded[pixel_ptr] = yq -= encoded[pixel_ptr];
278 uqvq -= AV_RL16(encoded+pixel_ptr+1);
279 AV_WL16(encoded+pixel_ptr+1, uqvq);
280 pixel_ptr += 3;
281 }
282 }
283 break;
284 case IMGTYPE_YUV422:
285 for (row = 0; row < height; row++) {
286 pixel_ptr = row * width * 2;
287 yq = uq = vq =0;
288 for (col = 0; col < width/4; col++) {
289 encoded[pixel_ptr] = yq -= encoded[pixel_ptr];
290 encoded[pixel_ptr+1] = yq -= encoded[pixel_ptr+1];
291 encoded[pixel_ptr+2] = yq -= encoded[pixel_ptr+2];
292 encoded[pixel_ptr+3] = yq -= encoded[pixel_ptr+3];
293 encoded[pixel_ptr+4] = uq -= encoded[pixel_ptr+4];
294 encoded[pixel_ptr+5] = uq -= encoded[pixel_ptr+5];
295 encoded[pixel_ptr+6] = vq -= encoded[pixel_ptr+6];
296 encoded[pixel_ptr+7] = vq -= encoded[pixel_ptr+7];
297 pixel_ptr += 8;
298 }
299 }
300 break;
301 case IMGTYPE_YUV411:
302 for (row = 0; row < height; row++) {
303 pixel_ptr = row * width / 2 * 3;
304 yq = uq = vq =0;
305 for (col = 0; col < width/4; col++) {
306 encoded[pixel_ptr] = yq -= encoded[pixel_ptr];
307 encoded[pixel_ptr+1] = yq -= encoded[pixel_ptr+1];
308 encoded[pixel_ptr+2] = yq -= encoded[pixel_ptr+2];
309 encoded[pixel_ptr+3] = yq -= encoded[pixel_ptr+3];
310 encoded[pixel_ptr+4] = uq -= encoded[pixel_ptr+4];
311 encoded[pixel_ptr+5] = vq -= encoded[pixel_ptr+5];
312 pixel_ptr += 6;
313 }
314 }
315 break;
316 case IMGTYPE_YUV211:
317 for (row = 0; row < height; row++) {
318 pixel_ptr = row * width * 2;
319 yq = uq = vq =0;
320 for (col = 0; col < width/2; col++) {
321 encoded[pixel_ptr] = yq -= encoded[pixel_ptr];
322 encoded[pixel_ptr+1] = yq -= encoded[pixel_ptr+1];
323 encoded[pixel_ptr+2] = uq -= encoded[pixel_ptr+2];
324 encoded[pixel_ptr+3] = vq -= encoded[pixel_ptr+3];
325 pixel_ptr += 4;
326 }
327 }
328 break;
329 case IMGTYPE_YUV420:
330 for (row = 0; row < height/2; row++) {
331 pixel_ptr = row * width * 3;
332 yq = y1q = uq = vq =0;
333 for (col = 0; col < width/2; col++) {
334 encoded[pixel_ptr] = yq -= encoded[pixel_ptr];
335 encoded[pixel_ptr+1] = yq -= encoded[pixel_ptr+1];
336 encoded[pixel_ptr+2] = y1q -= encoded[pixel_ptr+2];
337 encoded[pixel_ptr+3] = y1q -= encoded[pixel_ptr+3];
338 encoded[pixel_ptr+4] = uq -= encoded[pixel_ptr+4];
339 encoded[pixel_ptr+5] = vq -= encoded[pixel_ptr+5];
340 pixel_ptr += 6;
341 }
342 }
343 break;
344 default:
345 av_log(avctx, AV_LOG_ERROR, "BUG! Unknown imagetype in pngfilter switch.\n");
346 return -1;
347 }
348 }
349
350 /* Convert colorspace */
351 y_out = c->pic.data[0] + (height - 1) * c->pic.linesize[0];
352 u_out = c->pic.data[1] + (height - 1) * c->pic.linesize[1];
353 v_out = c->pic.data[2] + (height - 1) * c->pic.linesize[2];
354 switch (c->imgtype) {
355 case IMGTYPE_YUV111:
356 for (row = 0; row < height; row++) {
357 for (col = 0; col < width; col++) {
358 y_out[col] = *encoded++;
359 u_out[col] = *encoded++ + 128;
360 v_out[col] = *encoded++ + 128;
361 }
362 y_out -= c->pic.linesize[0];
363 u_out -= c->pic.linesize[1];
364 v_out -= c->pic.linesize[2];
365 }
366 break;
367 case IMGTYPE_YUV422:
368 for (row = 0; row < height; row++) {
369 for (col = 0; col < width - 3; col += 4) {
370 memcpy(y_out + col, encoded, 4);
371 encoded += 4;
372 u_out[ col >> 1 ] = *encoded++ + 128;
373 u_out[(col >> 1) + 1] = *encoded++ + 128;
374 v_out[ col >> 1 ] = *encoded++ + 128;
375 v_out[(col >> 1) + 1] = *encoded++ + 128;
376 }
377 y_out -= c->pic.linesize[0];
378 u_out -= c->pic.linesize[1];
379 v_out -= c->pic.linesize[2];
380 }
381 break;
382 case IMGTYPE_RGB24:
383 for (row = height - 1; row >= 0; row--) {
384 pixel_ptr = row * c->pic.linesize[0];
385 memcpy(outptr + pixel_ptr, encoded, 3 * width);
386 encoded += 3 * width;
387 }
388 break;
389 case IMGTYPE_YUV411:
390 for (row = 0; row < height; row++) {
391 for (col = 0; col < width - 3; col += 4) {
392 memcpy(y_out + col, encoded, 4);
393 encoded += 4;
394 u_out[col >> 2] = *encoded++ + 128;
395 v_out[col >> 2] = *encoded++ + 128;
396 }
397 y_out -= c->pic.linesize[0];
398 u_out -= c->pic.linesize[1];
399 v_out -= c->pic.linesize[2];
400 }
401 break;
402 case IMGTYPE_YUV211:
403 for (row = 0; row < height; row++) {
404 for (col = 0; col < width - 1; col += 2) {
405 memcpy(y_out + col, encoded, 2);
406 encoded += 2;
407 u_out[col >> 1] = *encoded++ + 128;
408 v_out[col >> 1] = *encoded++ + 128;
409 }
410 y_out -= c->pic.linesize[0];
411 u_out -= c->pic.linesize[1];
412 v_out -= c->pic.linesize[2];
413 }
414 break;
415 case IMGTYPE_YUV420:
416 u_out = c->pic.data[1] + ((height >> 1) - 1) * c->pic.linesize[1];
417 v_out = c->pic.data[2] + ((height >> 1) - 1) * c->pic.linesize[2];
418 for (row = 0; row < height - 1; row += 2) {
419 for (col = 0; col < width - 1; col += 2) {
420 memcpy(y_out + col, encoded, 2);
421 encoded += 2;
422 memcpy(y_out + col - c->pic.linesize[0], encoded, 2);
423 encoded += 2;
424 u_out[col >> 1] = *encoded++ + 128;
425 v_out[col >> 1] = *encoded++ + 128;
426 }
427 y_out -= c->pic.linesize[0] << 1;
428 u_out -= c->pic.linesize[1];
429 v_out -= c->pic.linesize[2];
430 }
431 break;
432 default:
433 av_log(avctx, AV_LOG_ERROR, "BUG! Unknown imagetype in image decoder.\n");
434 return -1;
435 }
436
437 *data_size = sizeof(AVFrame);
438 *(AVFrame*)data = c->pic;
439
440 /* always report that the buffer was completely consumed */
441 return buf_size;
442 }
443
444 /*
445 *
446 * Init lcl decoder
447 *
448 */
449 static av_cold int decode_init(AVCodecContext *avctx)
450 {
451 LclDecContext * const c = avctx->priv_data;
452 unsigned int basesize = avctx->width * avctx->height;
453 unsigned int max_basesize = FFALIGN(avctx->width, 4) * FFALIGN(avctx->height, 4) + AV_LZO_OUTPUT_PADDING;
454 unsigned int max_decomp_size;
455
456 if (avctx->extradata_size < 8) {
457 av_log(avctx, AV_LOG_ERROR, "Extradata size too small.\n");
458 return 1;
459 }
460
461 /* Check codec type */
462 if ((avctx->codec_id == CODEC_ID_MSZH && avctx->extradata[7] != CODEC_MSZH) ||
463 (avctx->codec_id == CODEC_ID_ZLIB && avctx->extradata[7] != CODEC_ZLIB)) {
464 av_log(avctx, AV_LOG_ERROR, "Codec id and codec type mismatch. This should not happen.\n");
465 }
466
467 /* Detect image type */
468 switch (c->imgtype = avctx->extradata[4]) {
469 case IMGTYPE_YUV111:
470 c->decomp_size = basesize * 3;
471 max_decomp_size = max_basesize * 3;
472 avctx->pix_fmt = PIX_FMT_YUV444P;
473 av_log(avctx, AV_LOG_DEBUG, "Image type is YUV 1:1:1.\n");
474 break;
475 case IMGTYPE_YUV422:
476 c->decomp_size = basesize * 2;
477 max_decomp_size = max_basesize * 2;
478 avctx->pix_fmt = PIX_FMT_YUV422P;
479 av_log(avctx, AV_LOG_DEBUG, "Image type is YUV 4:2:2.\n");
480 break;
481 case IMGTYPE_RGB24:
482 c->decomp_size = basesize * 3;
483 max_decomp_size = max_basesize * 3;
484 avctx->pix_fmt = PIX_FMT_BGR24;
485 av_log(avctx, AV_LOG_DEBUG, "Image type is RGB 24.\n");
486 break;
487 case IMGTYPE_YUV411:
488 c->decomp_size = basesize / 2 * 3;
489 max_decomp_size = max_basesize / 2 * 3;
490 avctx->pix_fmt = PIX_FMT_YUV411P;
491 av_log(avctx, AV_LOG_DEBUG, "Image type is YUV 4:1:1.\n");
492 break;
493 case IMGTYPE_YUV211:
494 c->decomp_size = basesize * 2;
495 max_decomp_size = max_basesize * 2;
496 avctx->pix_fmt = PIX_FMT_YUV422P;
497 av_log(avctx, AV_LOG_DEBUG, "Image type is YUV 2:1:1.\n");
498 break;
499 case IMGTYPE_YUV420:
500 c->decomp_size = basesize / 2 * 3;
501 max_decomp_size = max_basesize / 2 * 3;
502 avctx->pix_fmt = PIX_FMT_YUV420P;
503 av_log(avctx, AV_LOG_DEBUG, "Image type is YUV 4:2:0.\n");
504 break;
505 default:
506 av_log(avctx, AV_LOG_ERROR, "Unsupported image format %d.\n", c->imgtype);
507 return 1;
508 }
509
510 /* Detect compression method */
511 c->compression = (int8_t)avctx->extradata[5];
512 switch (avctx->codec_id) {
513 case CODEC_ID_MSZH:
514 switch (c->compression) {
515 case COMP_MSZH:
516 av_log(avctx, AV_LOG_DEBUG, "Compression enabled.\n");
517 break;
518 case COMP_MSZH_NOCOMP:
519 c->decomp_size = 0;
520 av_log(avctx, AV_LOG_DEBUG, "No compression.\n");
521 break;
522 default:
523 av_log(avctx, AV_LOG_ERROR, "Unsupported compression format for MSZH (%d).\n", c->compression);
524 return 1;
525 }
526 break;
527 #if CONFIG_ZLIB_DECODER
528 case CODEC_ID_ZLIB:
529 switch (c->compression) {
530 case COMP_ZLIB_HISPEED:
531 av_log(avctx, AV_LOG_DEBUG, "High speed compression.\n");
532 break;
533 case COMP_ZLIB_HICOMP:
534 av_log(avctx, AV_LOG_DEBUG, "High compression.\n");
535 break;
536 case COMP_ZLIB_NORMAL:
537 av_log(avctx, AV_LOG_DEBUG, "Normal compression.\n");
538 break;
539 default:
540 if (c->compression < Z_NO_COMPRESSION || c->compression > Z_BEST_COMPRESSION) {
541 av_log(avctx, AV_LOG_ERROR, "Unsupported compression level for ZLIB: (%d).\n", c->compression);
542 return 1;
543 }
544 av_log(avctx, AV_LOG_DEBUG, "Compression level for ZLIB: (%d).\n", c->compression);
545 }
546 break;
547 #endif
548 default:
549 av_log(avctx, AV_LOG_ERROR, "BUG! Unknown codec in compression switch.\n");
550 return 1;
551 }
552
553 /* Allocate decompression buffer */
554 if (c->decomp_size) {
555 if ((c->decomp_buf = av_malloc(max_decomp_size)) == NULL) {
556 av_log(avctx, AV_LOG_ERROR, "Can't allocate decompression buffer.\n");
557 return 1;
558 }
559 }
560
561 /* Detect flags */
562 c->flags = avctx->extradata[6];
563 if (c->flags & FLAG_MULTITHREAD)
564 av_log(avctx, AV_LOG_DEBUG, "Multithread encoder flag set.\n");
565 if (c->flags & FLAG_NULLFRAME)
566 av_log(avctx, AV_LOG_DEBUG, "Nullframe insertion flag set.\n");
567 if (avctx->codec_id == CODEC_ID_ZLIB && (c->flags & FLAG_PNGFILTER))
568 av_log(avctx, AV_LOG_DEBUG, "PNG filter flag set.\n");
569 if (c->flags & FLAGMASK_UNUSED)
570 av_log(avctx, AV_LOG_ERROR, "Unknown flag set (%d).\n", c->flags);
571
572 /* If needed init zlib */
573 #if CONFIG_ZLIB_DECODER
574 if (avctx->codec_id == CODEC_ID_ZLIB) {
575 int zret;
576 c->zstream.zalloc = Z_NULL;
577 c->zstream.zfree = Z_NULL;
578 c->zstream.opaque = Z_NULL;
579 zret = inflateInit(&c->zstream);
580 if (zret != Z_OK) {
581 av_log(avctx, AV_LOG_ERROR, "Inflate init error: %d\n", zret);
582 av_freep(&c->decomp_buf);
583 return 1;
584 }
585 }
586 #endif
587
588 return 0;
589 }
590
591 /*
592 *
593 * Uninit lcl decoder
594 *
595 */
596 static av_cold int decode_end(AVCodecContext *avctx)
597 {
598 LclDecContext * const c = avctx->priv_data;
599
600 av_freep(&c->decomp_buf);
601 if (c->pic.data[0])
602 avctx->release_buffer(avctx, &c->pic);
603 #if CONFIG_ZLIB_DECODER
604 if (avctx->codec_id == CODEC_ID_ZLIB)
605 inflateEnd(&c->zstream);
606 #endif
607
608 return 0;
609 }
610
611 #if CONFIG_MSZH_DECODER
612 AVCodec mszh_decoder = {
613 "mszh",
614 AVMEDIA_TYPE_VIDEO,
615 CODEC_ID_MSZH,
616 sizeof(LclDecContext),
617 decode_init,
618 NULL,
619 decode_end,
620 decode_frame,
621 CODEC_CAP_DR1,
622 .long_name = NULL_IF_CONFIG_SMALL("LCL (LossLess Codec Library) MSZH"),
623 };
624 #endif
625
626 #if CONFIG_ZLIB_DECODER
627 AVCodec zlib_decoder = {
628 "zlib",
629 AVMEDIA_TYPE_VIDEO,
630 CODEC_ID_ZLIB,
631 sizeof(LclDecContext),
632 decode_init,
633 NULL,
634 decode_end,
635 decode_frame,
636 CODEC_CAP_DR1,
637 .long_name = NULL_IF_CONFIG_SMALL("LCL (LossLess Codec Library) ZLIB"),
638 };
639 #endif