Revision 00eb27f1

View differences:

libavcodec/Makefile
123 123
OBJS-$(CONFIG_MSMPEG4V3_ENCODER)       += msmpeg4.o msmpeg4data.o mpegvideo_enc.o motion_est.o ratecontrol.o h263.o
124 124
OBJS-$(CONFIG_MSRLE_DECODER)           += msrle.o
125 125
OBJS-$(CONFIG_MSVIDEO1_DECODER)        += msvideo1.o
126
OBJS-$(CONFIG_MSZH_DECODER)            += lcl.o
126
OBJS-$(CONFIG_MSZH_DECODER)            += lcldec.o
127 127
OBJS-$(CONFIG_NUV_DECODER)             += nuv.o rtjpeg.o
128 128
OBJS-$(CONFIG_PAM_ENCODER)             += pnmenc.o pnm.o
129 129
OBJS-$(CONFIG_PBM_ENCODER)             += pnmenc.o pnm.o
......
209 209
OBJS-$(CONFIG_XAN_WC3_DECODER)         += xan.o
210 210
OBJS-$(CONFIG_XAN_WC4_DECODER)         += xan.o
211 211
OBJS-$(CONFIG_XL_DECODER)              += xl.o
212
OBJS-$(CONFIG_ZLIB_DECODER)            += lcl.o
213
OBJS-$(CONFIG_ZLIB_ENCODER)            += lcl.o
212
OBJS-$(CONFIG_ZLIB_DECODER)            += lcldec.o
213
OBJS-$(CONFIG_ZLIB_ENCODER)            += lclenc.o
214 214
OBJS-$(CONFIG_ZMBV_DECODER)            += zmbv.o
215 215
OBJS-$(CONFIG_ZMBV_ENCODER)            += zmbvenc.o
216 216

  
libavcodec/lcl.h
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
#ifndef AVCODEC_LCL_H
23
#define AVCODEC_LCL_H
24

  
25
#define BMPTYPE_YUV 1
26
#define BMPTYPE_RGB 2
27

  
28
#define IMGTYPE_YUV111 0
29
#define IMGTYPE_YUV422 1
30
#define IMGTYPE_RGB24 2
31
#define IMGTYPE_YUV411 3
32
#define IMGTYPE_YUV211 4
33
#define IMGTYPE_YUV420 5
34

  
35
#define COMP_MSZH 0
36
#define COMP_MSZH_NOCOMP 1
37
#define COMP_ZLIB_HISPEED 1
38
#define COMP_ZLIB_HICOMP 9
39
#define COMP_ZLIB_NORMAL -1
40

  
41
#define FLAG_MULTITHREAD 1
42
#define FLAG_NULLFRAME 2
43
#define FLAG_PNGFILTER 4
44
#define FLAGMASK_UNUSED 0xf8
45

  
46
#define CODEC_MSZH 1
47
#define CODEC_ZLIB 3
48

  
49
#endif /* AVCODEC_LCL_H */
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 lcl.c
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 "bitstream.h"
46
#include "lcl.h"
47

  
48
#ifdef CONFIG_ZLIB
49
#include <zlib.h>
50
#endif
51

  
52
/*
53
 * Decoder context
54
 */
55
typedef struct LclDecContext {
56

  
57
        AVCodecContext *avctx;
58
        AVFrame pic;
59

  
60
    // Image type
61
    int imgtype;
62
    // Compression type
63
    int compression;
64
    // Flags
65
    int flags;
66
    // Decompressed data size
67
    unsigned int decomp_size;
68
    // Decompression buffer
69
    unsigned char* decomp_buf;
70
#ifdef CONFIG_ZLIB
71
    z_stream zstream;
72
#endif
73
} LclDecContext;
74

  
75

  
76
/*
77
 *
78
 * Helper functions
79
 *
80
 */
81
static inline unsigned char fix (int pix14)
82
{
83
    int tmp;
84

  
85
    tmp = (pix14 + 0x80000) >> 20;
86
    if (tmp < 0)
87
        return 0;
88
    if (tmp > 255)
89
        return 255;
90
    return tmp;
91
}
92

  
93

  
94

  
95
static inline unsigned char get_b (unsigned char yq, signed char bq)
96
{
97
    return fix((yq << 20) + bq * 1858076);
98
}
99

  
100

  
101

  
102
static inline unsigned char get_g (unsigned char yq, signed char bq, signed char rq)
103
{
104
    return fix((yq << 20) - bq * 360857 - rq * 748830);
105
}
106

  
107

  
108

  
109
static inline unsigned char get_r (unsigned char yq, signed char rq)
110
{
111
    return fix((yq << 20) + rq * 1470103);
112
}
113

  
114

  
115

  
116
static unsigned int mszh_decomp(unsigned char * srcptr, int srclen, unsigned char * destptr, unsigned int destsize)
117
{
118
    unsigned char *destptr_bak = destptr;
119
    unsigned char *destptr_end = destptr + destsize;
120
    unsigned char mask = 0;
121
    unsigned char maskbit = 0;
122
    unsigned int ofs, cnt;
123

  
124
    while ((srclen > 0) && (destptr < destptr_end)) {
125
        if (maskbit == 0) {
126
            mask = *(srcptr++);
127
            maskbit = 8;
128
            srclen--;
129
            continue;
130
        }
131
        if ((mask & (1 << (--maskbit))) == 0) {
132
            if (destptr + 4 > destptr_end)
133
                break;
134
            *(int*)destptr = *(int*)srcptr;
135
            srclen -= 4;
136
            destptr += 4;
137
            srcptr += 4;
138
        } else {
139
            ofs = *(srcptr++);
140
            cnt = *(srcptr++);
141
            ofs += cnt * 256;;
142
            cnt = ((cnt >> 3) & 0x1f) + 1;
143
            ofs &= 0x7ff;
144
            srclen -= 2;
145
            cnt *= 4;
146
            if (destptr + cnt > destptr_end) {
147
                cnt =  destptr_end - destptr;
148
            }
149
            for (; cnt > 0; cnt--) {
150
                *(destptr) = *(destptr - ofs);
151
                destptr++;
152
            }
153
        }
154
    }
155

  
156
    return (destptr - destptr_bak);
157
}
158

  
159

  
160

  
161
/*
162
 *
163
 * Decode a frame
164
 *
165
 */
166
static int decode_frame(AVCodecContext *avctx, void *data, int *data_size, uint8_t *buf, int buf_size)
167
{
168
        LclDecContext * const c = avctx->priv_data;
169
        unsigned char *encoded = (unsigned char *)buf;
170
    unsigned int pixel_ptr;
171
    int row, col;
172
    unsigned char *outptr;
173
    unsigned int width = avctx->width; // Real image width
174
    unsigned int height = avctx->height; // Real image height
175
    unsigned int mszh_dlen;
176
    unsigned char yq, y1q, uq, vq;
177
    int uqvq;
178
    unsigned int mthread_inlen, mthread_outlen;
179
#ifdef CONFIG_ZLIB
180
    int zret; // Zlib return code
181
#endif
182
    unsigned int len = buf_size;
183

  
184
        if(c->pic.data[0])
185
                avctx->release_buffer(avctx, &c->pic);
186

  
187
        c->pic.reference = 0;
188
        c->pic.buffer_hints = FF_BUFFER_HINTS_VALID;
189
        if(avctx->get_buffer(avctx, &c->pic) < 0){
190
                av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
191
                return -1;
192
        }
193

  
194
    outptr = c->pic.data[0]; // Output image pointer
195

  
196
    /* Decompress frame */
197
    switch (avctx->codec_id) {
198
        case CODEC_ID_MSZH:
199
            switch (c->compression) {
200
                case COMP_MSZH:
201
                    if (c->flags & FLAG_MULTITHREAD) {
202
                        mthread_inlen = *((unsigned int*)encoded);
203
                        mthread_outlen = *((unsigned int*)(encoded+4));
204
                        if (mthread_outlen > c->decomp_size) // this should not happen
205
                            mthread_outlen = c->decomp_size;
206
                        mszh_dlen = mszh_decomp(encoded + 8, mthread_inlen, c->decomp_buf, c->decomp_size);
207
                        if (mthread_outlen != mszh_dlen) {
208
                            av_log(avctx, AV_LOG_ERROR, "Mthread1 decoded size differs (%d != %d)\n",
209
                                   mthread_outlen, mszh_dlen);
210
                            return -1;
211
                        }
212
                        mszh_dlen = mszh_decomp(encoded + 8 + mthread_inlen, len - mthread_inlen,
213
                                                c->decomp_buf + mthread_outlen, c->decomp_size - mthread_outlen);
214
                        if (mthread_outlen != mszh_dlen) {
215
                            av_log(avctx, AV_LOG_ERROR, "Mthread2 decoded size differs (%d != %d)\n",
216
                                   mthread_outlen, mszh_dlen);
217
                            return -1;
218
                        }
219
                        encoded = c->decomp_buf;
220
                        len = c->decomp_size;
221
                    } else {
222
                        mszh_dlen = mszh_decomp(encoded, len, c->decomp_buf, c->decomp_size);
223
                        if (c->decomp_size != mszh_dlen) {
224
                            av_log(avctx, AV_LOG_ERROR, "Decoded size differs (%d != %d)\n",
225
                                   c->decomp_size, mszh_dlen);
226
                            return -1;
227
                        }
228
                        encoded = c->decomp_buf;
229
                        len = mszh_dlen;
230
                    }
231
                    break;
232
                case COMP_MSZH_NOCOMP:
233
                    break;
234
                default:
235
                    av_log(avctx, AV_LOG_ERROR, "BUG! Unknown MSZH compression in frame decoder.\n");
236
                    return -1;
237
            }
238
            break;
239
        case CODEC_ID_ZLIB:
240
#ifdef CONFIG_ZLIB
241
            /* Using the original dll with normal compression (-1) and RGB format
242
             * gives a file with ZLIB fourcc, but frame is really uncompressed.
243
             * To be sure that's true check also frame size */
244
            if ((c->compression == COMP_ZLIB_NORMAL) && (c->imgtype == IMGTYPE_RGB24) &&
245
               (len == width * height * 3))
246
                break;
247
            zret = inflateReset(&(c->zstream));
248
            if (zret != Z_OK) {
249
                av_log(avctx, AV_LOG_ERROR, "Inflate reset error: %d\n", zret);
250
                return -1;
251
            }
252
            if (c->flags & FLAG_MULTITHREAD) {
253
                mthread_inlen = *((unsigned int*)encoded);
254
                mthread_outlen = *((unsigned int*)(encoded+4));
255
                if (mthread_outlen > c->decomp_size)
256
                    mthread_outlen = c->decomp_size;
257
                c->zstream.next_in = encoded + 8;
258
                c->zstream.avail_in = mthread_inlen;
259
                c->zstream.next_out = c->decomp_buf;
260
                c->zstream.avail_out = c->decomp_size;
261
                zret = inflate(&(c->zstream), Z_FINISH);
262
                if ((zret != Z_OK) && (zret != Z_STREAM_END)) {
263
                    av_log(avctx, AV_LOG_ERROR, "Mthread1 inflate error: %d\n", zret);
264
                    return -1;
265
                }
266
                if (mthread_outlen != (unsigned int)(c->zstream.total_out)) {
267
                    av_log(avctx, AV_LOG_ERROR, "Mthread1 decoded size differs (%u != %lu)\n",
268
                           mthread_outlen, c->zstream.total_out);
269
                    return -1;
270
                }
271
                zret = inflateReset(&(c->zstream));
272
                if (zret != Z_OK) {
273
                    av_log(avctx, AV_LOG_ERROR, "Mthread2 inflate reset error: %d\n", zret);
274
                    return -1;
275
                }
276
                c->zstream.next_in = encoded + 8 + mthread_inlen;
277
                c->zstream.avail_in = len - mthread_inlen;
278
                c->zstream.next_out = c->decomp_buf + mthread_outlen;
279
                c->zstream.avail_out = c->decomp_size - mthread_outlen;
280
                zret = inflate(&(c->zstream), Z_FINISH);
281
                if ((zret != Z_OK) && (zret != Z_STREAM_END)) {
282
                    av_log(avctx, AV_LOG_ERROR, "Mthread2 inflate error: %d\n", zret);
283
                    return -1;
284
                }
285
                if (mthread_outlen != (unsigned int)(c->zstream.total_out)) {
286
                    av_log(avctx, AV_LOG_ERROR, "Mthread2 decoded size differs (%d != %lu)\n",
287
                           mthread_outlen, c->zstream.total_out);
288
                    return -1;
289
                }
290
            } else {
291
                c->zstream.next_in = encoded;
292
                c->zstream.avail_in = len;
293
                c->zstream.next_out = c->decomp_buf;
294
                c->zstream.avail_out = c->decomp_size;
295
                zret = inflate(&(c->zstream), Z_FINISH);
296
                if ((zret != Z_OK) && (zret != Z_STREAM_END)) {
297
                    av_log(avctx, AV_LOG_ERROR, "Inflate error: %d\n", zret);
298
                    return -1;
299
                }
300
                if (c->decomp_size != (unsigned int)(c->zstream.total_out)) {
301
                    av_log(avctx, AV_LOG_ERROR, "Decoded size differs (%d != %lu)\n",
302
                           c->decomp_size, c->zstream.total_out);
303
                    return -1;
304
                }
305
            }
306
            encoded = c->decomp_buf;
307
            len = c->decomp_size;;
308
#else
309
            av_log(avctx, AV_LOG_ERROR, "BUG! Zlib support not compiled in frame decoder.\n");
310
            return -1;
311
#endif
312
            break;
313
        default:
314
            av_log(avctx, AV_LOG_ERROR, "BUG! Unknown codec in frame decoder compression switch.\n");
315
            return -1;
316
    }
317

  
318

  
319
    /* Apply PNG filter */
320
    if ((avctx->codec_id == CODEC_ID_ZLIB) && (c->flags & FLAG_PNGFILTER)) {
321
        switch (c->imgtype) {
322
            case IMGTYPE_YUV111:
323
            case IMGTYPE_RGB24:
324
                for (row = 0; row < height; row++) {
325
                    pixel_ptr = row * width * 3;
326
                    yq = encoded[pixel_ptr++];
327
                    uqvq = AV_RL16(encoded+pixel_ptr);
328
                    pixel_ptr += 2;
329
                    for (col = 1; col < width; col++) {
330
                        encoded[pixel_ptr] = yq -= encoded[pixel_ptr];
331
                        uqvq -= AV_RL16(encoded+pixel_ptr+1);
332
                        AV_WL16(encoded+pixel_ptr+1, uqvq);
333
                        pixel_ptr += 3;
334
                    }
335
                }
336
                break;
337
            case IMGTYPE_YUV422:
338
                for (row = 0; row < height; row++) {
339
                    pixel_ptr = row * width * 2;
340
                    yq = uq = vq =0;
341
                    for (col = 0; col < width/4; col++) {
342
                        encoded[pixel_ptr] = yq -= encoded[pixel_ptr];
343
                        encoded[pixel_ptr+1] = yq -= encoded[pixel_ptr+1];
344
                        encoded[pixel_ptr+2] = yq -= encoded[pixel_ptr+2];
345
                        encoded[pixel_ptr+3] = yq -= encoded[pixel_ptr+3];
346
                        encoded[pixel_ptr+4] = uq -= encoded[pixel_ptr+4];
347
                        encoded[pixel_ptr+5] = uq -= encoded[pixel_ptr+5];
348
                        encoded[pixel_ptr+6] = vq -= encoded[pixel_ptr+6];
349
                        encoded[pixel_ptr+7] = vq -= encoded[pixel_ptr+7];
350
                        pixel_ptr += 8;
351
                    }
352
                }
353
                break;
354
            case IMGTYPE_YUV411:
355
                for (row = 0; row < height; row++) {
356
                    pixel_ptr = row * width / 2 * 3;
357
                    yq = uq = vq =0;
358
                    for (col = 0; col < width/4; col++) {
359
                        encoded[pixel_ptr] = yq -= encoded[pixel_ptr];
360
                        encoded[pixel_ptr+1] = yq -= encoded[pixel_ptr+1];
361
                        encoded[pixel_ptr+2] = yq -= encoded[pixel_ptr+2];
362
                        encoded[pixel_ptr+3] = yq -= encoded[pixel_ptr+3];
363
                        encoded[pixel_ptr+4] = uq -= encoded[pixel_ptr+4];
364
                        encoded[pixel_ptr+5] = vq -= encoded[pixel_ptr+5];
365
                        pixel_ptr += 6;
366
                    }
367
                }
368
                break;
369
            case IMGTYPE_YUV211:
370
                for (row = 0; row < height; row++) {
371
                    pixel_ptr = row * width * 2;
372
                    yq = uq = vq =0;
373
                    for (col = 0; col < width/2; col++) {
374
                        encoded[pixel_ptr] = yq -= encoded[pixel_ptr];
375
                        encoded[pixel_ptr+1] = yq -= encoded[pixel_ptr+1];
376
                        encoded[pixel_ptr+2] = uq -= encoded[pixel_ptr+2];
377
                        encoded[pixel_ptr+3] = vq -= encoded[pixel_ptr+3];
378
                        pixel_ptr += 4;
379
                    }
380
                }
381
                break;
382
            case IMGTYPE_YUV420:
383
                for (row = 0; row < height/2; row++) {
384
                    pixel_ptr = row * width * 3;
385
                    yq = y1q = uq = vq =0;
386
                    for (col = 0; col < width/2; col++) {
387
                        encoded[pixel_ptr] = yq -= encoded[pixel_ptr];
388
                        encoded[pixel_ptr+1] = yq -= encoded[pixel_ptr+1];
389
                        encoded[pixel_ptr+2] = y1q -= encoded[pixel_ptr+2];
390
                        encoded[pixel_ptr+3] = y1q -= encoded[pixel_ptr+3];
391
                        encoded[pixel_ptr+4] = uq -= encoded[pixel_ptr+4];
392
                        encoded[pixel_ptr+5] = vq -= encoded[pixel_ptr+5];
393
                        pixel_ptr += 6;
394
                    }
395
                }
396
                break;
397
            default:
398
                av_log(avctx, AV_LOG_ERROR, "BUG! Unknown imagetype in pngfilter switch.\n");
399
                return -1;
400
        }
401
    }
402

  
403
    /* Convert colorspace */
404
    switch (c->imgtype) {
405
        case IMGTYPE_YUV111:
406
            for (row = height - 1; row >= 0; row--) {
407
                pixel_ptr = row * c->pic.linesize[0];
408
                for (col = 0; col < width; col++) {
409
                    outptr[pixel_ptr++] = get_b(encoded[0], encoded[1]);
410
                    outptr[pixel_ptr++] = get_g(encoded[0], encoded[1], encoded[2]);
411
                    outptr[pixel_ptr++] = get_r(encoded[0], encoded[2]);
412
                    encoded += 3;
413
                }
414
            }
415
            break;
416
        case IMGTYPE_YUV422:
417
            for (row = height - 1; row >= 0; row--) {
418
                pixel_ptr = row * c->pic.linesize[0];
419
                for (col = 0; col < width/4; col++) {
420
                    outptr[pixel_ptr++] = get_b(encoded[0], encoded[4]);
421
                    outptr[pixel_ptr++] = get_g(encoded[0], encoded[4], encoded[6]);
422
                    outptr[pixel_ptr++] = get_r(encoded[0], encoded[6]);
423
                    outptr[pixel_ptr++] = get_b(encoded[1], encoded[4]);
424
                    outptr[pixel_ptr++] = get_g(encoded[1], encoded[4], encoded[6]);
425
                    outptr[pixel_ptr++] = get_r(encoded[1], encoded[6]);
426
                    outptr[pixel_ptr++] = get_b(encoded[2], encoded[5]);
427
                    outptr[pixel_ptr++] = get_g(encoded[2], encoded[5], encoded[7]);
428
                    outptr[pixel_ptr++] = get_r(encoded[2], encoded[7]);
429
                    outptr[pixel_ptr++] = get_b(encoded[3], encoded[5]);
430
                    outptr[pixel_ptr++] = get_g(encoded[3], encoded[5], encoded[7]);
431
                    outptr[pixel_ptr++] = get_r(encoded[3], encoded[7]);
432
                    encoded += 8;
433
                }
434
            }
435
            break;
436
        case IMGTYPE_RGB24:
437
            for (row = height - 1; row >= 0; row--) {
438
                pixel_ptr = row * c->pic.linesize[0];
439
                for (col = 0; col < width; col++) {
440
                    outptr[pixel_ptr++] = encoded[0];
441
                    outptr[pixel_ptr++] = encoded[1];
442
                    outptr[pixel_ptr++] = encoded[2];
443
                    encoded += 3;
444
                }
445
            }
446
            break;
447
        case IMGTYPE_YUV411:
448
            for (row = height - 1; row >= 0; row--) {
449
                pixel_ptr = row * c->pic.linesize[0];
450
                for (col = 0; col < width/4; col++) {
451
                    outptr[pixel_ptr++] = get_b(encoded[0], encoded[4]);
452
                    outptr[pixel_ptr++] = get_g(encoded[0], encoded[4], encoded[5]);
453
                    outptr[pixel_ptr++] = get_r(encoded[0], encoded[5]);
454
                    outptr[pixel_ptr++] = get_b(encoded[1], encoded[4]);
455
                    outptr[pixel_ptr++] = get_g(encoded[1], encoded[4], encoded[5]);
456
                    outptr[pixel_ptr++] = get_r(encoded[1], encoded[5]);
457
                    outptr[pixel_ptr++] = get_b(encoded[2], encoded[4]);
458
                    outptr[pixel_ptr++] = get_g(encoded[2], encoded[4], encoded[5]);
459
                    outptr[pixel_ptr++] = get_r(encoded[2], encoded[5]);
460
                    outptr[pixel_ptr++] = get_b(encoded[3], encoded[4]);
461
                    outptr[pixel_ptr++] = get_g(encoded[3], encoded[4], encoded[5]);
462
                    outptr[pixel_ptr++] = get_r(encoded[3], encoded[5]);
463
                    encoded += 6;
464
                }
465
            }
466
            break;
467
        case IMGTYPE_YUV211:
468
            for (row = height - 1; row >= 0; row--) {
469
                pixel_ptr = row * c->pic.linesize[0];
470
                for (col = 0; col < width/2; col++) {
471
                    outptr[pixel_ptr++] = get_b(encoded[0], encoded[2]);
472
                    outptr[pixel_ptr++] = get_g(encoded[0], encoded[2], encoded[3]);
473
                    outptr[pixel_ptr++] = get_r(encoded[0], encoded[3]);
474
                    outptr[pixel_ptr++] = get_b(encoded[1], encoded[2]);
475
                    outptr[pixel_ptr++] = get_g(encoded[1], encoded[2], encoded[3]);
476
                    outptr[pixel_ptr++] = get_r(encoded[1], encoded[3]);
477
                    encoded += 4;
478
                }
479
            }
480
            break;
481
        case IMGTYPE_YUV420:
482
            for (row = height / 2 - 1; row >= 0; row--) {
483
                pixel_ptr = 2 * row * c->pic.linesize[0];
484
                for (col = 0; col < width/2; col++) {
485
                    outptr[pixel_ptr] = get_b(encoded[0], encoded[4]);
486
                    outptr[pixel_ptr+1] = get_g(encoded[0], encoded[4], encoded[5]);
487
                    outptr[pixel_ptr+2] = get_r(encoded[0], encoded[5]);
488
                    outptr[pixel_ptr+3] = get_b(encoded[1], encoded[4]);
489
                    outptr[pixel_ptr+4] = get_g(encoded[1], encoded[4], encoded[5]);
490
                    outptr[pixel_ptr+5] = get_r(encoded[1], encoded[5]);
491
                    outptr[pixel_ptr-c->pic.linesize[0]] = get_b(encoded[2], encoded[4]);
492
                    outptr[pixel_ptr-c->pic.linesize[0]+1] = get_g(encoded[2], encoded[4], encoded[5]);
493
                    outptr[pixel_ptr-c->pic.linesize[0]+2] = get_r(encoded[2], encoded[5]);
494
                    outptr[pixel_ptr-c->pic.linesize[0]+3] = get_b(encoded[3], encoded[4]);
495
                    outptr[pixel_ptr-c->pic.linesize[0]+4] = get_g(encoded[3], encoded[4], encoded[5]);
496
                    outptr[pixel_ptr-c->pic.linesize[0]+5] = get_r(encoded[3], encoded[5]);
497
                    pixel_ptr += 6;
498
                    encoded += 6;
499
                }
500
            }
501
            break;
502
        default:
503
            av_log(avctx, AV_LOG_ERROR, "BUG! Unknown imagetype in image decoder.\n");
504
            return -1;
505
    }
506

  
507
    *data_size = sizeof(AVFrame);
508
    *(AVFrame*)data = c->pic;
509

  
510
    /* always report that the buffer was completely consumed */
511
    return buf_size;
512
}
513

  
514
/*
515
 *
516
 * Init lcl decoder
517
 *
518
 */
519
static int decode_init(AVCodecContext *avctx)
520
{
521
    LclDecContext * const c = avctx->priv_data;
522
    unsigned int basesize = avctx->width * avctx->height;
523
    unsigned int max_basesize = ((avctx->width + 3) & ~3) * ((avctx->height + 3) & ~3);
524
    unsigned int max_decomp_size;
525
    int zret; // Zlib return code
526

  
527
    c->avctx = avctx;
528

  
529
    c->pic.data[0] = NULL;
530

  
531
#ifdef CONFIG_ZLIB
532
    // Needed if zlib unused or init aborted before inflateInit
533
    memset(&(c->zstream), 0, sizeof(z_stream));
534
#endif
535

  
536
    if (avctx->extradata_size < 8) {
537
        av_log(avctx, AV_LOG_ERROR, "Extradata size too small.\n");
538
        return 1;
539
    }
540

  
541
    if (avcodec_check_dimensions(avctx, avctx->width, avctx->height) < 0) {
542
        return 1;
543
    }
544

  
545
    /* Check codec type */
546
    if (((avctx->codec_id == CODEC_ID_MSZH)  && (*((char *)avctx->extradata + 7) != CODEC_MSZH)) ||
547
        ((avctx->codec_id == CODEC_ID_ZLIB)  && (*((char *)avctx->extradata + 7) != CODEC_ZLIB))) {
548
        av_log(avctx, AV_LOG_ERROR, "Codec id and codec type mismatch. This should not happen.\n");
549
    }
550

  
551
    /* Detect image type */
552
    switch (c->imgtype = *((char *)avctx->extradata + 4)) {
553
        case IMGTYPE_YUV111:
554
            c->decomp_size = basesize * 3;
555
            max_decomp_size = max_basesize * 3;
556
            av_log(avctx, AV_LOG_INFO, "Image type is YUV 1:1:1.\n");
557
            break;
558
        case IMGTYPE_YUV422:
559
            c->decomp_size = basesize * 2;
560
            max_decomp_size = max_basesize * 2;
561
            av_log(avctx, AV_LOG_INFO, "Image type is YUV 4:2:2.\n");
562
            break;
563
        case IMGTYPE_RGB24:
564
            c->decomp_size = basesize * 3;
565
            max_decomp_size = max_basesize * 3;
566
            av_log(avctx, AV_LOG_INFO, "Image type is RGB 24.\n");
567
            break;
568
        case IMGTYPE_YUV411:
569
            c->decomp_size = basesize / 2 * 3;
570
            max_decomp_size = max_basesize / 2 * 3;
571
            av_log(avctx, AV_LOG_INFO, "Image type is YUV 4:1:1.\n");
572
            break;
573
        case IMGTYPE_YUV211:
574
            c->decomp_size = basesize * 2;
575
            max_decomp_size = max_basesize * 2;
576
            av_log(avctx, AV_LOG_INFO, "Image type is YUV 2:1:1.\n");
577
            break;
578
        case IMGTYPE_YUV420:
579
            c->decomp_size = basesize / 2 * 3;
580
            max_decomp_size = max_basesize / 2 * 3;
581
            av_log(avctx, AV_LOG_INFO, "Image type is YUV 4:2:0.\n");
582
            break;
583
        default:
584
            av_log(avctx, AV_LOG_ERROR, "Unsupported image format %d.\n", c->imgtype);
585
            return 1;
586
    }
587

  
588
    /* Detect compression method */
589
    c->compression = *((char *)avctx->extradata + 5);
590
    switch (avctx->codec_id) {
591
        case CODEC_ID_MSZH:
592
            switch (c->compression) {
593
                case COMP_MSZH:
594
                    av_log(avctx, AV_LOG_INFO, "Compression enabled.\n");
595
                    break;
596
                case COMP_MSZH_NOCOMP:
597
                    c->decomp_size = 0;
598
                    av_log(avctx, AV_LOG_INFO, "No compression.\n");
599
                    break;
600
                default:
601
                    av_log(avctx, AV_LOG_ERROR, "Unsupported compression format for MSZH (%d).\n", c->compression);
602
                    return 1;
603
            }
604
            break;
605
        case CODEC_ID_ZLIB:
606
#ifdef CONFIG_ZLIB
607
            switch (c->compression) {
608
                case COMP_ZLIB_HISPEED:
609
                    av_log(avctx, AV_LOG_INFO, "High speed compression.\n");
610
                    break;
611
                case COMP_ZLIB_HICOMP:
612
                    av_log(avctx, AV_LOG_INFO, "High compression.\n");
613
                    break;
614
                case COMP_ZLIB_NORMAL:
615
                    av_log(avctx, AV_LOG_INFO, "Normal compression.\n");
616
                    break;
617
                default:
618
                    if ((c->compression < Z_NO_COMPRESSION) || (c->compression > Z_BEST_COMPRESSION)) {
619
                            av_log(avctx, AV_LOG_ERROR, "Unsupported compression level for ZLIB: (%d).\n", c->compression);
620
                        return 1;
621
                    }
622
                    av_log(avctx, AV_LOG_INFO, "Compression level for ZLIB: (%d).\n", c->compression);
623
            }
624
#else
625
            av_log(avctx, AV_LOG_ERROR, "Zlib support not compiled.\n");
626
            return 1;
627
#endif
628
            break;
629
        default:
630
            av_log(avctx, AV_LOG_ERROR, "BUG! Unknown codec in compression switch.\n");
631
            return 1;
632
    }
633

  
634
    /* Allocate decompression buffer */
635
    if (c->decomp_size) {
636
        if ((c->decomp_buf = av_malloc(max_decomp_size)) == NULL) {
637
            av_log(avctx, AV_LOG_ERROR, "Can't allocate decompression buffer.\n");
638
            return 1;
639
        }
640
    }
641

  
642
    /* Detect flags */
643
    c->flags = *((char *)avctx->extradata + 6);
644
    if (c->flags & FLAG_MULTITHREAD)
645
        av_log(avctx, AV_LOG_INFO, "Multithread encoder flag set.\n");
646
    if (c->flags & FLAG_NULLFRAME)
647
        av_log(avctx, AV_LOG_INFO, "Nullframe insertion flag set.\n");
648
    if ((avctx->codec_id == CODEC_ID_ZLIB) && (c->flags & FLAG_PNGFILTER))
649
        av_log(avctx, AV_LOG_INFO, "PNG filter flag set.\n");
650
    if (c->flags & FLAGMASK_UNUSED)
651
        av_log(avctx, AV_LOG_ERROR, "Unknown flag set (%d).\n", c->flags);
652

  
653
    /* If needed init zlib */
654
    if (avctx->codec_id == CODEC_ID_ZLIB) {
655
#ifdef CONFIG_ZLIB
656
        c->zstream.zalloc = Z_NULL;
657
        c->zstream.zfree = Z_NULL;
658
        c->zstream.opaque = Z_NULL;
659
        zret = inflateInit(&(c->zstream));
660
        if (zret != Z_OK) {
661
            av_log(avctx, AV_LOG_ERROR, "Inflate init error: %d\n", zret);
662
            return 1;
663
        }
664
#else
665
    av_log(avctx, AV_LOG_ERROR, "Zlib support not compiled.\n");
666
    return 1;
667
#endif
668
    }
669

  
670
    avctx->pix_fmt = PIX_FMT_BGR24;
671

  
672
    return 0;
673
}
674

  
675
/*
676
 *
677
 * Uninit lcl decoder
678
 *
679
 */
680
static int decode_end(AVCodecContext *avctx)
681
{
682
        LclDecContext * const c = avctx->priv_data;
683

  
684
        if (c->pic.data[0])
685
                avctx->release_buffer(avctx, &c->pic);
686
#ifdef CONFIG_ZLIB
687
    inflateEnd(&(c->zstream));
688
#endif
689

  
690
        return 0;
691
}
692

  
693
#ifdef CONFIG_MSZH_DECODER
694
AVCodec mszh_decoder = {
695
        "mszh",
696
        CODEC_TYPE_VIDEO,
697
        CODEC_ID_MSZH,
698
        sizeof(LclDecContext),
699
        decode_init,
700
        NULL,
701
        decode_end,
702
        decode_frame,
703
        CODEC_CAP_DR1,
704
};
705
#endif
706

  
707
#ifdef CONFIG_ZLIB_DECODER
708
AVCodec zlib_decoder = {
709
        "zlib",
710
        CODEC_TYPE_VIDEO,
711
        CODEC_ID_ZLIB,
712
        sizeof(LclDecContext),
713
        decode_init,
714
        NULL,
715
        decode_end,
716
        decode_frame,
717
        CODEC_CAP_DR1,
718
};
719
#endif
libavcodec/lclenc.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 lcl.c
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 "bitstream.h"
46
#include "lcl.h"
47

  
48
#ifdef CONFIG_ZLIB
49
#include <zlib.h>
50
#endif
51

  
52
/*
53
 * Decoder context
54
 */
55
typedef struct LclEncContext {
56

  
57
        AVCodecContext *avctx;
58
        AVFrame pic;
59
    PutBitContext pb;
60

  
61
    // Image type
62
    int imgtype;
63
    // Compression type
64
    int compression;
65
    // Flags
66
    int flags;
67
    // Decompressed data size
68
    unsigned int decomp_size;
69
    // Maximum compressed data size
70
    unsigned int max_comp_size;
71
    // Compression buffer
72
    unsigned char* comp_buf;
73
#ifdef CONFIG_ZLIB
74
    z_stream zstream;
75
#endif
76
} LclEncContext;
77

  
78
/*
79
 *
80
 * Encode a frame
81
 *
82
 */
83
static int encode_frame(AVCodecContext *avctx, unsigned char *buf, int buf_size, void *data){
84
    LclEncContext *c = avctx->priv_data;
85
    AVFrame *pict = data;
86
    AVFrame * const p = &c->pic;
87
    int i;
88
    int zret; // Zlib return code
89

  
90
#ifndef CONFIG_ZLIB
91
    av_log(avctx, AV_LOG_ERROR, "Zlib support not compiled in.\n");
92
    return -1;
93
#else
94

  
95
    init_put_bits(&c->pb, buf, buf_size);
96

  
97
    *p = *pict;
98
    p->pict_type= FF_I_TYPE;
99
    p->key_frame= 1;
100

  
101
    if(avctx->pix_fmt != PIX_FMT_BGR24){
102
        av_log(avctx, AV_LOG_ERROR, "Format not supported!\n");
103
        return -1;
104
    }
105

  
106
    zret = deflateReset(&(c->zstream));
107
    if (zret != Z_OK) {
108
        av_log(avctx, AV_LOG_ERROR, "Deflate reset error: %d\n", zret);
109
        return -1;
110
    }
111
    c->zstream.next_out = c->comp_buf;
112
    c->zstream.avail_out = c->max_comp_size;
113

  
114
    for(i = avctx->height - 1; i >= 0; i--) {
115
        c->zstream.next_in = p->data[0]+p->linesize[0]*i;
116
        c->zstream.avail_in = avctx->width*3;
117
        zret = deflate(&(c->zstream), Z_NO_FLUSH);
118
        if (zret != Z_OK) {
119
            av_log(avctx, AV_LOG_ERROR, "Deflate error: %d\n", zret);
120
            return -1;
121
        }
122
    }
123
    zret = deflate(&(c->zstream), Z_FINISH);
124
    if (zret != Z_STREAM_END) {
125
        av_log(avctx, AV_LOG_ERROR, "Deflate error: %d\n", zret);
126
        return -1;
127
    }
128

  
129
    for (i = 0; i < c->zstream.total_out; i++)
130
        put_bits(&c->pb, 8, c->comp_buf[i]);
131
    flush_put_bits(&c->pb);
132

  
133
    return c->zstream.total_out;
134
#endif
135
}
136

  
137
/*
138
 *
139
 * Init lcl encoder
140
 *
141
 */
142
static int encode_init(AVCodecContext *avctx)
143
{
144
    LclEncContext *c = avctx->priv_data;
145
    int zret; // Zlib return code
146

  
147
#ifndef CONFIG_ZLIB
148
    av_log(avctx, AV_LOG_ERROR, "Zlib support not compiled.\n");
149
    return 1;
150
#else
151

  
152
    c->avctx= avctx;
153

  
154
    assert(avctx->width && avctx->height);
155

  
156
    avctx->extradata= av_mallocz(8);
157
    avctx->coded_frame= &c->pic;
158

  
159
    // Will be user settable someday
160
    c->compression = 6;
161
    c->flags = 0;
162

  
163
    switch(avctx->pix_fmt){
164
        case PIX_FMT_BGR24:
165
            c->imgtype = IMGTYPE_RGB24;
166
            c->decomp_size = avctx->width * avctx->height * 3;
167
            avctx->bits_per_sample= 24;
168
            break;
169
        default:
170
            av_log(avctx, AV_LOG_ERROR, "Format %d not supported\n", avctx->pix_fmt);
171
            return -1;
172
    }
173

  
174
    ((uint8_t*)avctx->extradata)[0]= 4;
175
    ((uint8_t*)avctx->extradata)[1]= 0;
176
    ((uint8_t*)avctx->extradata)[2]= 0;
177
    ((uint8_t*)avctx->extradata)[3]= 0;
178
    ((uint8_t*)avctx->extradata)[4]= c->imgtype;
179
    ((uint8_t*)avctx->extradata)[5]= c->compression;
180
    ((uint8_t*)avctx->extradata)[6]= c->flags;
181
    ((uint8_t*)avctx->extradata)[7]= CODEC_ZLIB;
182
    c->avctx->extradata_size= 8;
183

  
184
    c->zstream.zalloc = Z_NULL;
185
    c->zstream.zfree = Z_NULL;
186
    c->zstream.opaque = Z_NULL;
187
    zret = deflateInit(&(c->zstream), c->compression);
188
    if (zret != Z_OK) {
189
        av_log(avctx, AV_LOG_ERROR, "Deflate init error: %d\n", zret);
190
        return 1;
191
    }
192

  
193
        /* Conservative upper bound taken from zlib v1.2.1 source */
194
        c->max_comp_size = c->decomp_size + ((c->decomp_size + 7) >> 3) +
195
                           ((c->decomp_size + 63) >> 6) + 11;
196
    if ((c->comp_buf = av_malloc(c->max_comp_size)) == NULL) {
197
        av_log(avctx, AV_LOG_ERROR, "Can't allocate compression buffer.\n");
198
        return 1;
199
    }
200

  
201
    return 0;
202
#endif
203
}
204

  
205
/*
206
 *
207
 * Uninit lcl encoder
208
 *
209
 */
210
static int encode_end(AVCodecContext *avctx)
211
{
212
    LclEncContext *c = avctx->priv_data;
213

  
214
    av_freep(&avctx->extradata);
215
    av_freep(&c->comp_buf);
216
#ifdef CONFIG_ZLIB
217
    deflateEnd(&(c->zstream));
218
#endif
219

  
220
    return 0;
221
}
222

  
223
AVCodec zlib_encoder = {
224
    "zlib",
225
    CODEC_TYPE_VIDEO,
226
    CODEC_ID_ZLIB,
227
    sizeof(LclEncContext),
228
    encode_init,
229
    encode_frame,
230
    encode_end,
231
};

Also available in: Unified diff