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r1009: Move the dependencies to newer package names
[cinelerra_cv/mob.git] / quicktime / ffmpeg / libavcodec / lcl.c
blobb93f314489f3262b8a66c3acc16f97400c5c68b1
1 /*
2 * LCL (LossLess Codec Library) Codec
3 * Copyright (c) 2002-2004 Roberto Togni
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 lcl.c
23 * LCL (LossLess Codec Library) Video Codec
24 * Decoder for MSZH and ZLIB codecs
25 * Experimental encoder for ZLIB RGB24
26 *
27 * Fourcc: MSZH, ZLIB
28 *
29 * Original Win32 dll:
30 * Ver2.23 By Kenji Oshima 2000.09.20
31 * avimszh.dll, avizlib.dll
32 *
33 * A description of the decoding algorithm can be found here:
34 * http://www.pcisys.net/~melanson/codecs
35 *
36 * Supports: BGR24 (RGB 24bpp)
37 *
38 */
39
40 #include <stdio.h>
41 #include <stdlib.h>
42
43 #include "common.h"
44 #include "bitstream.h"
45 #include "avcodec.h"
46
47 #ifdef CONFIG_ZLIB
48 #include <zlib.h>
49 #endif
50
51
52 #define BMPTYPE_YUV 1
53 #define BMPTYPE_RGB 2
54
55 #define IMGTYPE_YUV111 0
56 #define IMGTYPE_YUV422 1
57 #define IMGTYPE_RGB24 2
58 #define IMGTYPE_YUV411 3
59 #define IMGTYPE_YUV211 4
60 #define IMGTYPE_YUV420 5
61
62 #define COMP_MSZH 0
63 #define COMP_MSZH_NOCOMP 1
64 #define COMP_ZLIB_HISPEED 1
65 #define COMP_ZLIB_HICOMP 9
66 #define COMP_ZLIB_NORMAL -1
67
68 #define FLAG_MULTITHREAD 1
69 #define FLAG_NULLFRAME 2
70 #define FLAG_PNGFILTER 4
71 #define FLAGMASK_UNUSED 0xf8
72
73 #define CODEC_MSZH 1
74 #define CODEC_ZLIB 3
75
76 #define FOURCC_MSZH mmioFOURCC('M','S','Z','H')
77 #define FOURCC_ZLIB mmioFOURCC('Z','L','I','B')
78
79 /*
80 * Decoder context
81 */
82 typedef struct LclContext {
83
84 AVCodecContext *avctx;
85 AVFrame pic;
86 PutBitContext pb;
87
88 // Image type
89 int imgtype;
90 // Compression type
91 int compression;
92 // Flags
93 int flags;
94 // Decompressed data size
95 unsigned int decomp_size;
96 // Decompression buffer
97 unsigned char* decomp_buf;
98 // Maximum compressed data size
99 unsigned int max_comp_size;
100 // Compression buffer
101 unsigned char* comp_buf;
102 #ifdef CONFIG_ZLIB
103 z_stream zstream;
104 #endif
105 } LclContext;
106
107
108 /*
109 *
110 * Helper functions
111 *
112 */
113 static inline unsigned char fix (int pix14)
114 {
115 int tmp;
116
117 tmp = (pix14 + 0x80000) >> 20;
118 if (tmp < 0)
119 return 0;
120 if (tmp > 255)
121 return 255;
122 return tmp;
123 }
124
125
126
127 static inline unsigned char get_b (unsigned char yq, signed char bq)
128 {
129 return fix((yq << 20) + bq * 1858076);
130 }
131
132
133
134 static inline unsigned char get_g (unsigned char yq, signed char bq, signed char rq)
135 {
136 return fix((yq << 20) - bq * 360857 - rq * 748830);
137 }
138
139
140
141 static inline unsigned char get_r (unsigned char yq, signed char rq)
142 {
143 return fix((yq << 20) + rq * 1470103);
144 }
145
146
147
148 static unsigned int mszh_decomp(unsigned char * srcptr, int srclen, unsigned char * destptr, unsigned int destsize)
149 {
150 unsigned char *destptr_bak = destptr;
151 unsigned char *destptr_end = destptr + destsize;
152 unsigned char mask = 0;
153 unsigned char maskbit = 0;
154 unsigned int ofs, cnt;
155
156 while ((srclen > 0) && (destptr < destptr_end)) {
157 if (maskbit == 0) {
158 mask = *(srcptr++);
159 maskbit = 8;
160 srclen--;
161 continue;
162 }
163 if ((mask & (1 << (--maskbit))) == 0) {
164 if (destptr + 4 > destptr_end)
165 break;
166 *(int*)destptr = *(int*)srcptr;
167 srclen -= 4;
168 destptr += 4;
169 srcptr += 4;
170 } else {
171 ofs = *(srcptr++);
172 cnt = *(srcptr++);
173 ofs += cnt * 256;;
174 cnt = ((cnt >> 3) & 0x1f) + 1;
175 ofs &= 0x7ff;
176 srclen -= 2;
177 cnt *= 4;
178 if (destptr + cnt > destptr_end) {
179 cnt = destptr_end - destptr;
180 }
181 for (; cnt > 0; cnt--) {
182 *(destptr) = *(destptr - ofs);
183 destptr++;
184 }
185 }
186 }
187
188 return (destptr - destptr_bak);
189 }
190
191
192
193
194 /*
195 *
196 * Decode a frame
197 *
198 */
199 static int decode_frame(AVCodecContext *avctx, void *data, int *data_size, uint8_t *buf, int buf_size)
200 {
201 LclContext * const c = (LclContext *)avctx->priv_data;
202 unsigned char *encoded = (unsigned char *)buf;
203 unsigned int pixel_ptr;
204 int row, col;
205 unsigned char *outptr;
206 unsigned int width = avctx->width; // Real image width
207 unsigned int height = avctx->height; // Real image height
208 unsigned int mszh_dlen;
209 unsigned char yq, y1q, uq, vq;
210 int uqvq;
211 unsigned int mthread_inlen, mthread_outlen;
212 #ifdef CONFIG_ZLIB
213 int zret; // Zlib return code
214 #endif
215 unsigned int len = buf_size;
216
217 if(c->pic.data[0])
218 avctx->release_buffer(avctx, &c->pic);
219
220 c->pic.reference = 0;
221 c->pic.buffer_hints = FF_BUFFER_HINTS_VALID;
222 if(avctx->get_buffer(avctx, &c->pic) < 0){
223 av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
224 return -1;
225 }
226
227 outptr = c->pic.data[0]; // Output image pointer
228
229 /* Decompress frame */
230 switch (avctx->codec_id) {
231 case CODEC_ID_MSZH:
232 switch (c->compression) {
233 case COMP_MSZH:
234 if (c->flags & FLAG_MULTITHREAD) {
235 mthread_inlen = *((unsigned int*)encoded);
236 mthread_outlen = *((unsigned int*)(encoded+4));
237 if (mthread_outlen > c->decomp_size) // this should not happen
238 mthread_outlen = c->decomp_size;
239 mszh_dlen = mszh_decomp(encoded + 8, mthread_inlen, c->decomp_buf, c->decomp_size);
240 if (mthread_outlen != mszh_dlen) {
241 av_log(avctx, AV_LOG_ERROR, "Mthread1 decoded size differs (%d != %d)\n",
242 mthread_outlen, mszh_dlen);
243 return -1;
244 }
245 mszh_dlen = mszh_decomp(encoded + 8 + mthread_inlen, len - mthread_inlen,
246 c->decomp_buf + mthread_outlen, c->decomp_size - mthread_outlen);
247 if (mthread_outlen != mszh_dlen) {
248 av_log(avctx, AV_LOG_ERROR, "Mthread2 decoded size differs (%d != %d)\n",
249 mthread_outlen, mszh_dlen);
250 return -1;
251 }
252 encoded = c->decomp_buf;
253 len = c->decomp_size;
254 } else {
255 mszh_dlen = mszh_decomp(encoded, len, c->decomp_buf, c->decomp_size);
256 if (c->decomp_size != mszh_dlen) {
257 av_log(avctx, AV_LOG_ERROR, "Decoded size differs (%d != %d)\n",
258 c->decomp_size, mszh_dlen);
259 return -1;
260 }
261 encoded = c->decomp_buf;
262 len = mszh_dlen;
263 }
264 break;
265 case COMP_MSZH_NOCOMP:
266 break;
267 default:
268 av_log(avctx, AV_LOG_ERROR, "BUG! Unknown MSZH compression in frame decoder.\n");
269 return -1;
270 }
271 break;
272 case CODEC_ID_ZLIB:
273 #ifdef CONFIG_ZLIB
274 /* Using the original dll with normal compression (-1) and RGB format
275 * gives a file with ZLIB fourcc, but frame is really uncompressed.
276 * To be sure that's true check also frame size */
277 if ((c->compression == COMP_ZLIB_NORMAL) && (c->imgtype == IMGTYPE_RGB24) &&
278 (len == width * height * 3))
279 break;
280 zret = inflateReset(&(c->zstream));
281 if (zret != Z_OK) {
282 av_log(avctx, AV_LOG_ERROR, "Inflate reset error: %d\n", zret);
283 return -1;
284 }
285 if (c->flags & FLAG_MULTITHREAD) {
286 mthread_inlen = *((unsigned int*)encoded);
287 mthread_outlen = *((unsigned int*)(encoded+4));
288 if (mthread_outlen > c->decomp_size)
289 mthread_outlen = c->decomp_size;
290 c->zstream.next_in = encoded + 8;
291 c->zstream.avail_in = mthread_inlen;
292 c->zstream.next_out = c->decomp_buf;
293 c->zstream.avail_out = c->decomp_size;
294 zret = inflate(&(c->zstream), Z_FINISH);
295 if ((zret != Z_OK) && (zret != Z_STREAM_END)) {
296 av_log(avctx, AV_LOG_ERROR, "Mthread1 inflate error: %d\n", zret);
297 return -1;
298 }
299 if (mthread_outlen != (unsigned int)(c->zstream.total_out)) {
300 av_log(avctx, AV_LOG_ERROR, "Mthread1 decoded size differs (%u != %lu)\n",
301 mthread_outlen, c->zstream.total_out);
302 return -1;
303 }
304 zret = inflateReset(&(c->zstream));
305 if (zret != Z_OK) {
306 av_log(avctx, AV_LOG_ERROR, "Mthread2 inflate reset error: %d\n", zret);
307 return -1;
308 }
309 c->zstream.next_in = encoded + 8 + mthread_inlen;
310 c->zstream.avail_in = len - mthread_inlen;
311 c->zstream.next_out = c->decomp_buf + mthread_outlen;
312 c->zstream.avail_out = c->decomp_size - mthread_outlen;
313 zret = inflate(&(c->zstream), Z_FINISH);
314 if ((zret != Z_OK) && (zret != Z_STREAM_END)) {
315 av_log(avctx, AV_LOG_ERROR, "Mthread2 inflate error: %d\n", zret);
316 return -1;
317 }
318 if (mthread_outlen != (unsigned int)(c->zstream.total_out)) {
319 av_log(avctx, AV_LOG_ERROR, "Mthread2 decoded size differs (%d != %lu)\n",
320 mthread_outlen, c->zstream.total_out);
321 return -1;
322 }
323 } else {
324 c->zstream.next_in = encoded;
325 c->zstream.avail_in = len;
326 c->zstream.next_out = c->decomp_buf;
327 c->zstream.avail_out = c->decomp_size;
328 zret = inflate(&(c->zstream), Z_FINISH);
329 if ((zret != Z_OK) && (zret != Z_STREAM_END)) {
330 av_log(avctx, AV_LOG_ERROR, "Inflate error: %d\n", zret);
331 return -1;
332 }
333 if (c->decomp_size != (unsigned int)(c->zstream.total_out)) {
334 av_log(avctx, AV_LOG_ERROR, "Decoded size differs (%d != %lu)\n",
335 c->decomp_size, c->zstream.total_out);
336 return -1;
337 }
338 }
339 encoded = c->decomp_buf;
340 len = c->decomp_size;;
341 #else
342 av_log(avctx, AV_LOG_ERROR, "BUG! Zlib support not compiled in frame decoder.\n");
343 return -1;
344 #endif
345 break;
346 default:
347 av_log(avctx, AV_LOG_ERROR, "BUG! Unknown codec in frame decoder compression switch.\n");
348 return -1;
349 }
350
351
352 /* Apply PNG filter */
353 if ((avctx->codec_id == CODEC_ID_ZLIB) && (c->flags & FLAG_PNGFILTER)) {
354 switch (c->imgtype) {
355 case IMGTYPE_YUV111:
356 case IMGTYPE_RGB24:
357 for (row = 0; row < height; row++) {
358 pixel_ptr = row * width * 3;
359 yq = encoded[pixel_ptr++];
360 uqvq = encoded[pixel_ptr++];
361 uqvq+=(encoded[pixel_ptr++] << 8);
362 for (col = 1; col < width; col++) {
363 encoded[pixel_ptr] = yq -= encoded[pixel_ptr];
364 uqvq -= (encoded[pixel_ptr+1] | (encoded[pixel_ptr+2]<<8));
365 encoded[pixel_ptr+1] = (uqvq) & 0xff;
366 encoded[pixel_ptr+2] = ((uqvq)>>8) & 0xff;
367 pixel_ptr += 3;
368 }
369 }
370 break;
371 case IMGTYPE_YUV422:
372 for (row = 0; row < height; row++) {
373 pixel_ptr = row * width * 2;
374 yq = uq = vq =0;
375 for (col = 0; col < width/4; col++) {
376 encoded[pixel_ptr] = yq -= encoded[pixel_ptr];
377 encoded[pixel_ptr+1] = yq -= encoded[pixel_ptr+1];
378 encoded[pixel_ptr+2] = yq -= encoded[pixel_ptr+2];
379 encoded[pixel_ptr+3] = yq -= encoded[pixel_ptr+3];
380 encoded[pixel_ptr+4] = uq -= encoded[pixel_ptr+4];
381 encoded[pixel_ptr+5] = uq -= encoded[pixel_ptr+5];
382 encoded[pixel_ptr+6] = vq -= encoded[pixel_ptr+6];
383 encoded[pixel_ptr+7] = vq -= encoded[pixel_ptr+7];
384 pixel_ptr += 8;
385 }
386 }
387 break;
388 case IMGTYPE_YUV411:
389 for (row = 0; row < height; row++) {
390 pixel_ptr = row * width / 2 * 3;
391 yq = uq = vq =0;
392 for (col = 0; col < width/4; col++) {
393 encoded[pixel_ptr] = yq -= encoded[pixel_ptr];
394 encoded[pixel_ptr+1] = yq -= encoded[pixel_ptr+1];
395 encoded[pixel_ptr+2] = yq -= encoded[pixel_ptr+2];
396 encoded[pixel_ptr+3] = yq -= encoded[pixel_ptr+3];
397 encoded[pixel_ptr+4] = uq -= encoded[pixel_ptr+4];
398 encoded[pixel_ptr+5] = vq -= encoded[pixel_ptr+5];
399 pixel_ptr += 6;
400 }
401 }
402 break;
403 case IMGTYPE_YUV211:
404 for (row = 0; row < height; row++) {
405 pixel_ptr = row * width * 2;
406 yq = uq = vq =0;
407 for (col = 0; col < width/2; col++) {
408 encoded[pixel_ptr] = yq -= encoded[pixel_ptr];
409 encoded[pixel_ptr+1] = yq -= encoded[pixel_ptr+1];
410 encoded[pixel_ptr+2] = uq -= encoded[pixel_ptr+2];
411 encoded[pixel_ptr+3] = vq -= encoded[pixel_ptr+3];
412 pixel_ptr += 4;
413 }
414 }
415 break;
416 case IMGTYPE_YUV420:
417 for (row = 0; row < height/2; row++) {
418 pixel_ptr = row * width * 3;
419 yq = y1q = uq = vq =0;
420 for (col = 0; col < width/2; col++) {
421 encoded[pixel_ptr] = yq -= encoded[pixel_ptr];
422 encoded[pixel_ptr+1] = yq -= encoded[pixel_ptr+1];
423 encoded[pixel_ptr+2] = y1q -= encoded[pixel_ptr+2];
424 encoded[pixel_ptr+3] = y1q -= encoded[pixel_ptr+3];
425 encoded[pixel_ptr+4] = uq -= encoded[pixel_ptr+4];
426 encoded[pixel_ptr+5] = vq -= encoded[pixel_ptr+5];
427 pixel_ptr += 6;
428 }
429 }
430 break;
431 default:
432 av_log(avctx, AV_LOG_ERROR, "BUG! Unknown imagetype in pngfilter switch.\n");
433 return -1;
434 }
435 }
436
437 /* Convert colorspace */
438 switch (c->imgtype) {
439 case IMGTYPE_YUV111:
440 for (row = height - 1; row >= 0; row--) {
441 pixel_ptr = row * c->pic.linesize[0];
442 for (col = 0; col < width; col++) {
443 outptr[pixel_ptr++] = get_b(encoded[0], encoded[1]);
444 outptr[pixel_ptr++] = get_g(encoded[0], encoded[1], encoded[2]);
445 outptr[pixel_ptr++] = get_r(encoded[0], encoded[2]);
446 encoded += 3;
447 }
448 }
449 break;
450 case IMGTYPE_YUV422:
451 for (row = height - 1; row >= 0; row--) {
452 pixel_ptr = row * c->pic.linesize[0];
453 for (col = 0; col < width/4; col++) {
454 outptr[pixel_ptr++] = get_b(encoded[0], encoded[4]);
455 outptr[pixel_ptr++] = get_g(encoded[0], encoded[4], encoded[6]);
456 outptr[pixel_ptr++] = get_r(encoded[0], encoded[6]);
457 outptr[pixel_ptr++] = get_b(encoded[1], encoded[4]);
458 outptr[pixel_ptr++] = get_g(encoded[1], encoded[4], encoded[6]);
459 outptr[pixel_ptr++] = get_r(encoded[1], encoded[6]);
460 outptr[pixel_ptr++] = get_b(encoded[2], encoded[5]);
461 outptr[pixel_ptr++] = get_g(encoded[2], encoded[5], encoded[7]);
462 outptr[pixel_ptr++] = get_r(encoded[2], encoded[7]);
463 outptr[pixel_ptr++] = get_b(encoded[3], encoded[5]);
464 outptr[pixel_ptr++] = get_g(encoded[3], encoded[5], encoded[7]);
465 outptr[pixel_ptr++] = get_r(encoded[3], encoded[7]);
466 encoded += 8;
467 }
468 }
469 break;
470 case IMGTYPE_RGB24:
471 for (row = height - 1; row >= 0; row--) {
472 pixel_ptr = row * c->pic.linesize[0];
473 for (col = 0; col < width; col++) {
474 outptr[pixel_ptr++] = encoded[0];
475 outptr[pixel_ptr++] = encoded[1];
476 outptr[pixel_ptr++] = encoded[2];
477 encoded += 3;
478 }
479 }
480 break;
481 case IMGTYPE_YUV411:
482 for (row = height - 1; row >= 0; row--) {
483 pixel_ptr = row * c->pic.linesize[0];
484 for (col = 0; col < width/4; col++) {
485 outptr[pixel_ptr++] = get_b(encoded[0], encoded[4]);
486 outptr[pixel_ptr++] = get_g(encoded[0], encoded[4], encoded[5]);
487 outptr[pixel_ptr++] = get_r(encoded[0], encoded[5]);
488 outptr[pixel_ptr++] = get_b(encoded[1], encoded[4]);
489 outptr[pixel_ptr++] = get_g(encoded[1], encoded[4], encoded[5]);
490 outptr[pixel_ptr++] = get_r(encoded[1], encoded[5]);
491 outptr[pixel_ptr++] = get_b(encoded[2], encoded[4]);
492 outptr[pixel_ptr++] = get_g(encoded[2], encoded[4], encoded[5]);
493 outptr[pixel_ptr++] = get_r(encoded[2], encoded[5]);
494 outptr[pixel_ptr++] = get_b(encoded[3], encoded[4]);
495 outptr[pixel_ptr++] = get_g(encoded[3], encoded[4], encoded[5]);
496 outptr[pixel_ptr++] = get_r(encoded[3], encoded[5]);
497 encoded += 6;
498 }
499 }
500 break;
501 case IMGTYPE_YUV211:
502 for (row = height - 1; row >= 0; row--) {
503 pixel_ptr = row * c->pic.linesize[0];
504 for (col = 0; col < width/2; col++) {
505 outptr[pixel_ptr++] = get_b(encoded[0], encoded[2]);
506 outptr[pixel_ptr++] = get_g(encoded[0], encoded[2], encoded[3]);
507 outptr[pixel_ptr++] = get_r(encoded[0], encoded[3]);
508 outptr[pixel_ptr++] = get_b(encoded[1], encoded[2]);
509 outptr[pixel_ptr++] = get_g(encoded[1], encoded[2], encoded[3]);
510 outptr[pixel_ptr++] = get_r(encoded[1], encoded[3]);
511 encoded += 4;
512 }
513 }
514 break;
515 case IMGTYPE_YUV420:
516 for (row = height / 2 - 1; row >= 0; row--) {
517 pixel_ptr = 2 * row * c->pic.linesize[0];
518 for (col = 0; col < width/2; col++) {
519 outptr[pixel_ptr] = get_b(encoded[0], encoded[4]);
520 outptr[pixel_ptr+1] = get_g(encoded[0], encoded[4], encoded[5]);
521 outptr[pixel_ptr+2] = get_r(encoded[0], encoded[5]);
522 outptr[pixel_ptr+3] = get_b(encoded[1], encoded[4]);
523 outptr[pixel_ptr+4] = get_g(encoded[1], encoded[4], encoded[5]);
524 outptr[pixel_ptr+5] = get_r(encoded[1], encoded[5]);
525 outptr[pixel_ptr-c->pic.linesize[0]] = get_b(encoded[2], encoded[4]);
526 outptr[pixel_ptr-c->pic.linesize[0]+1] = get_g(encoded[2], encoded[4], encoded[5]);
527 outptr[pixel_ptr-c->pic.linesize[0]+2] = get_r(encoded[2], encoded[5]);
528 outptr[pixel_ptr-c->pic.linesize[0]+3] = get_b(encoded[3], encoded[4]);
529 outptr[pixel_ptr-c->pic.linesize[0]+4] = get_g(encoded[3], encoded[4], encoded[5]);
530 outptr[pixel_ptr-c->pic.linesize[0]+5] = get_r(encoded[3], encoded[5]);
531 pixel_ptr += 6;
532 encoded += 6;
533 }
534 }
535 break;
536 default:
537 av_log(avctx, AV_LOG_ERROR, "BUG! Unknown imagetype in image decoder.\n");
538 return -1;
539 }
540
541 *data_size = sizeof(AVFrame);
542 *(AVFrame*)data = c->pic;
543
544 /* always report that the buffer was completely consumed */
545 return buf_size;
546 }
547
548
549
550 /*
551 *
552 * Encode a frame
553 *
554 */
555 static int encode_frame(AVCodecContext *avctx, unsigned char *buf, int buf_size, void *data){
556 LclContext *c = avctx->priv_data;
557 AVFrame *pict = data;
558 AVFrame * const p = &c->pic;
559 int i;
560 int zret; // Zlib return code
561
562 #ifndef CONFIG_ZLIB
563 av_log(avctx, AV_LOG_ERROR, "Zlib support not compiled in.\n");
564 return -1;
565 #else
566
567 init_put_bits(&c->pb, buf, buf_size);
568
569 *p = *pict;
570 p->pict_type= FF_I_TYPE;
571 p->key_frame= 1;
572
573 if(avctx->pix_fmt != PIX_FMT_BGR24){
574 av_log(avctx, AV_LOG_ERROR, "Format not supported!\n");
575 return -1;
576 }
577
578 zret = deflateReset(&(c->zstream));
579 if (zret != Z_OK) {
580 av_log(avctx, AV_LOG_ERROR, "Deflate reset error: %d\n", zret);
581 return -1;
582 }
583 c->zstream.next_out = c->comp_buf;
584 c->zstream.avail_out = c->max_comp_size;
585
586 for(i = avctx->height - 1; i >= 0; i--) {
587 c->zstream.next_in = p->data[0]+p->linesize[0]*i;
588 c->zstream.avail_in = avctx->width*3;
589 zret = deflate(&(c->zstream), Z_NO_FLUSH);
590 if (zret != Z_OK) {
591 av_log(avctx, AV_LOG_ERROR, "Deflate error: %d\n", zret);
592 return -1;
593 }
594 }
595 zret = deflate(&(c->zstream), Z_FINISH);
596 if (zret != Z_STREAM_END) {
597 av_log(avctx, AV_LOG_ERROR, "Deflate error: %d\n", zret);
598 return -1;
599 }
600
601 for (i = 0; i < c->zstream.total_out; i++)
602 put_bits(&c->pb, 8, c->comp_buf[i]);
603 flush_put_bits(&c->pb);
604
605 return c->zstream.total_out;
606 #endif
607 }
608
609
610
611 /*
612 *
613 * Init lcl decoder
614 *
615 */
616 static int decode_init(AVCodecContext *avctx)
617 {
618 LclContext * const c = (LclContext *)avctx->priv_data;
619 unsigned int basesize = avctx->width * avctx->height;
620 unsigned int max_basesize = ((avctx->width + 3) & ~3) * ((avctx->height + 3) & ~3);
621 unsigned int max_decomp_size;
622 int zret; // Zlib return code
623
624 c->avctx = avctx;
625 avctx->has_b_frames = 0;
626
627 c->pic.data[0] = NULL;
628
629 #ifdef CONFIG_ZLIB
630 // Needed if zlib unused or init aborted before inflateInit
631 memset(&(c->zstream), 0, sizeof(z_stream));
632 #endif
633
634 if (avctx->extradata_size < 8) {
635 av_log(avctx, AV_LOG_ERROR, "Extradata size too small.\n");
636 return 1;
637 }
638
639 if (avcodec_check_dimensions(avctx, avctx->width, avctx->height) < 0) {
640 return 1;
641 }
642
643 /* Check codec type */
644 if (((avctx->codec_id == CODEC_ID_MSZH) && (*((char *)avctx->extradata + 7) != CODEC_MSZH)) ||
645 ((avctx->codec_id == CODEC_ID_ZLIB) && (*((char *)avctx->extradata + 7) != CODEC_ZLIB))) {
646 av_log(avctx, AV_LOG_ERROR, "Codec id and codec type mismatch. This should not happen.\n");
647 }
648
649 /* Detect image type */
650 switch (c->imgtype = *((char *)avctx->extradata + 4)) {
651 case IMGTYPE_YUV111:
652 c->decomp_size = basesize * 3;
653 max_decomp_size = max_basesize * 3;
654 av_log(avctx, AV_LOG_INFO, "Image type is YUV 1:1:1.\n");
655 break;
656 case IMGTYPE_YUV422:
657 c->decomp_size = basesize * 2;
658 max_decomp_size = max_basesize * 2;
659 av_log(avctx, AV_LOG_INFO, "Image type is YUV 4:2:2.\n");
660 break;
661 case IMGTYPE_RGB24:
662 c->decomp_size = basesize * 3;
663 max_decomp_size = max_basesize * 3;
664 av_log(avctx, AV_LOG_INFO, "Image type is RGB 24.\n");
665 break;
666 case IMGTYPE_YUV411:
667 c->decomp_size = basesize / 2 * 3;
668 max_decomp_size = max_basesize / 2 * 3;
669 av_log(avctx, AV_LOG_INFO, "Image type is YUV 4:1:1.\n");
670 break;
671 case IMGTYPE_YUV211:
672 c->decomp_size = basesize * 2;
673 max_decomp_size = max_basesize * 2;
674 av_log(avctx, AV_LOG_INFO, "Image type is YUV 2:1:1.\n");
675 break;
676 case IMGTYPE_YUV420:
677 c->decomp_size = basesize / 2 * 3;
678 max_decomp_size = max_basesize / 2 * 3;
679 av_log(avctx, AV_LOG_INFO, "Image type is YUV 4:2:0.\n");
680 break;
681 default:
682 av_log(avctx, AV_LOG_ERROR, "Unsupported image format %d.\n", c->imgtype);
683 return 1;
684 }
685
686 /* Detect compression method */
687 c->compression = *((char *)avctx->extradata + 5);
688 switch (avctx->codec_id) {
689 case CODEC_ID_MSZH:
690 switch (c->compression) {
691 case COMP_MSZH:
692 av_log(avctx, AV_LOG_INFO, "Compression enabled.\n");
693 break;
694 case COMP_MSZH_NOCOMP:
695 c->decomp_size = 0;
696 av_log(avctx, AV_LOG_INFO, "No compression.\n");
697 break;
698 default:
699 av_log(avctx, AV_LOG_ERROR, "Unsupported compression format for MSZH (%d).\n", c->compression);
700 return 1;
701 }
702 break;
703 case CODEC_ID_ZLIB:
704 #ifdef CONFIG_ZLIB
705 switch (c->compression) {
706 case COMP_ZLIB_HISPEED:
707 av_log(avctx, AV_LOG_INFO, "High speed compression.\n");
708 break;
709 case COMP_ZLIB_HICOMP:
710 av_log(avctx, AV_LOG_INFO, "High compression.\n");
711 break;
712 case COMP_ZLIB_NORMAL:
713 av_log(avctx, AV_LOG_INFO, "Normal compression.\n");
714 break;
715 default:
716 if ((c->compression < Z_NO_COMPRESSION) || (c->compression > Z_BEST_COMPRESSION)) {
717 av_log(avctx, AV_LOG_ERROR, "Unsupported compression level for ZLIB: (%d).\n", c->compression);
718 return 1;
719 }
720 av_log(avctx, AV_LOG_INFO, "Compression level for ZLIB: (%d).\n", c->compression);
721 }
722 #else
723 av_log(avctx, AV_LOG_ERROR, "Zlib support not compiled.\n");
724 return 1;
725 #endif
726 break;
727 default:
728 av_log(avctx, AV_LOG_ERROR, "BUG! Unknown codec in compression switch.\n");
729 return 1;
730 }
731
732 /* Allocate decompression buffer */
733 if (c->decomp_size) {
734 if ((c->decomp_buf = av_malloc(max_decomp_size)) == NULL) {
735 av_log(avctx, AV_LOG_ERROR, "Can't allocate decompression buffer.\n");
736 return 1;
737 }
738 }
739
740 /* Detect flags */
741 c->flags = *((char *)avctx->extradata + 6);
742 if (c->flags & FLAG_MULTITHREAD)
743 av_log(avctx, AV_LOG_INFO, "Multithread encoder flag set.\n");
744 if (c->flags & FLAG_NULLFRAME)
745 av_log(avctx, AV_LOG_INFO, "Nullframe insertion flag set.\n");
746 if ((avctx->codec_id == CODEC_ID_ZLIB) && (c->flags & FLAG_PNGFILTER))
747 av_log(avctx, AV_LOG_INFO, "PNG filter flag set.\n");
748 if (c->flags & FLAGMASK_UNUSED)
749 av_log(avctx, AV_LOG_ERROR, "Unknown flag set (%d).\n", c->flags);
750
751 /* If needed init zlib */
752 if (avctx->codec_id == CODEC_ID_ZLIB) {
753 #ifdef CONFIG_ZLIB
754 c->zstream.zalloc = Z_NULL;
755 c->zstream.zfree = Z_NULL;
756 c->zstream.opaque = Z_NULL;
757 zret = inflateInit(&(c->zstream));
758 if (zret != Z_OK) {
759 av_log(avctx, AV_LOG_ERROR, "Inflate init error: %d\n", zret);
760 return 1;
761 }
762 #else
763 av_log(avctx, AV_LOG_ERROR, "Zlib support not compiled.\n");
764 return 1;
765 #endif
766 }
767
768 avctx->pix_fmt = PIX_FMT_BGR24;
769
770 return 0;
771 }
772
773
774
775 /*
776 *
777 * Init lcl encoder
778 *
779 */
780 static int encode_init(AVCodecContext *avctx)
781 {
782 LclContext *c = avctx->priv_data;
783 int zret; // Zlib return code
784
785 #ifndef CONFIG_ZLIB
786 av_log(avctx, AV_LOG_ERROR, "Zlib support not compiled.\n");
787 return 1;
788 #else
789
790 c->avctx= avctx;
791
792 assert(avctx->width && avctx->height);
793
794 avctx->extradata= av_mallocz(8);
795 avctx->coded_frame= &c->pic;
796
797 // Will be user settable someday
798 c->compression = 6;
799 c->flags = 0;
800
801 switch(avctx->pix_fmt){
802 case PIX_FMT_BGR24:
803 c->imgtype = IMGTYPE_RGB24;
804 c->decomp_size = avctx->width * avctx->height * 3;
805 avctx->bits_per_sample= 24;
806 break;
807 default:
808 av_log(avctx, AV_LOG_ERROR, "Format %d not supported\n", avctx->pix_fmt);
809 return -1;
810 }
811
812 ((uint8_t*)avctx->extradata)[0]= 4;
813 ((uint8_t*)avctx->extradata)[1]= 0;
814 ((uint8_t*)avctx->extradata)[2]= 0;
815 ((uint8_t*)avctx->extradata)[3]= 0;
816 ((uint8_t*)avctx->extradata)[4]= c->imgtype;
817 ((uint8_t*)avctx->extradata)[5]= c->compression;
818 ((uint8_t*)avctx->extradata)[6]= c->flags;
819 ((uint8_t*)avctx->extradata)[7]= CODEC_ZLIB;
820 c->avctx->extradata_size= 8;
821
822 c->zstream.zalloc = Z_NULL;
823 c->zstream.zfree = Z_NULL;
824 c->zstream.opaque = Z_NULL;
825 zret = deflateInit(&(c->zstream), c->compression);
826 if (zret != Z_OK) {
827 av_log(avctx, AV_LOG_ERROR, "Deflate init error: %d\n", zret);
828 return 1;
829 }
830
831 /* Conservative upper bound taken from zlib v1.2.1 source */
832 c->max_comp_size = c->decomp_size + ((c->decomp_size + 7) >> 3) +
833 ((c->decomp_size + 63) >> 6) + 11;
834 if ((c->comp_buf = av_malloc(c->max_comp_size)) == NULL) {
835 av_log(avctx, AV_LOG_ERROR, "Can't allocate compression buffer.\n");
836 return 1;
837 }
838
839 return 0;
840 #endif
841 }
842
843
844
845
846
847 /*
848 *
849 * Uninit lcl decoder
850 *
851 */
852 static int decode_end(AVCodecContext *avctx)
853 {
854 LclContext * const c = (LclContext *)avctx->priv_data;
855
856 if (c->pic.data[0])
857 avctx->release_buffer(avctx, &c->pic);
858 #ifdef CONFIG_ZLIB
859 inflateEnd(&(c->zstream));
860 #endif
861
862 return 0;
863 }
864
865
866
867 /*
868 *
869 * Uninit lcl encoder
870 *
871 */
872 static int encode_end(AVCodecContext *avctx)
873 {
874 LclContext *c = avctx->priv_data;
875
876 av_freep(&avctx->extradata);
877 av_freep(&c->comp_buf);
878 #ifdef CONFIG_ZLIB
879 deflateEnd(&(c->zstream));
880 #endif
881
882 return 0;
883 }
884
885 AVCodec mszh_decoder = {
886 "mszh",
887 CODEC_TYPE_VIDEO,
888 CODEC_ID_MSZH,
889 sizeof(LclContext),
890 decode_init,
891 NULL,
892 decode_end,
893 decode_frame,
894 CODEC_CAP_DR1,
895 };
896
897
898 AVCodec zlib_decoder = {
899 "zlib",
900 CODEC_TYPE_VIDEO,
901 CODEC_ID_ZLIB,
902 sizeof(LclContext),
903 decode_init,
904 NULL,
905 decode_end,
906 decode_frame,
907 CODEC_CAP_DR1,
908 };
909
910 #ifdef CONFIG_ENCODERS
911
912 AVCodec zlib_encoder = {
913 "zlib",
914 CODEC_TYPE_VIDEO,
915 CODEC_ID_ZLIB,
916 sizeof(LclContext),
917 encode_init,
918 encode_frame,
919 encode_end,
920 };
921
922 #endif //CONFIG_ENCODERS
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