2 * MJPEG encoder and decoder
3 * Copyright (c) 2000, 2001 Fabrice Bellard.
4 * Copyright (c) 2003 Alex Beregszaszi
5 * Copyright (c) 2003-2004 Michael Niedermayer
7 * This library 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 of the License, or (at your option) any later version.
12 * This library 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 this library; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
21 * Support for external huffman table, various fixes (AVID workaround),
22 * aspecting, new decode_frame mechanism and apple mjpeg-b support
23 * by Alex Beregszaszi <alex@naxine.org>
28 * MJPEG encoder and decoder.
36 #include "mpegvideo.h"
38 /* use two quantizer tables (one for luminance and one for chrominance) */
42 typedef struct MJpegContext {
43 uint8_t huff_size_dc_luminance[12]; //FIXME use array [3] instead of lumi / chrom, for easier addressing
44 uint16_t huff_code_dc_luminance[12];
45 uint8_t huff_size_dc_chrominance[12];
46 uint16_t huff_code_dc_chrominance[12];
48 uint8_t huff_size_ac_luminance[256];
49 uint16_t huff_code_ac_luminance[256];
50 uint8_t huff_size_ac_chrominance[256];
51 uint16_t huff_code_ac_chrominance[256];
54 /* JPEG marker codes */
57 SOF0 = 0xc0, /* baseline */
58 SOF1 = 0xc1, /* extended sequential, huffman */
59 SOF2 = 0xc2, /* progressive, huffman */
60 SOF3 = 0xc3, /* lossless, huffman */
62 SOF5 = 0xc5, /* differential sequential, huffman */
63 SOF6 = 0xc6, /* differential progressive, huffman */
64 SOF7 = 0xc7, /* differential lossless, huffman */
65 JPG = 0xc8, /* reserved for JPEG extension */
66 SOF9 = 0xc9, /* extended sequential, arithmetic */
67 SOF10 = 0xca, /* progressive, arithmetic */
68 SOF11 = 0xcb, /* lossless, arithmetic */
70 SOF13 = 0xcd, /* differential sequential, arithmetic */
71 SOF14 = 0xce, /* differential progressive, arithmetic */
72 SOF15 = 0xcf, /* differential lossless, arithmetic */
74 DHT = 0xc4, /* define huffman tables */
76 DAC = 0xcc, /* define arithmetic-coding conditioning */
78 /* restart with modulo 8 count "m" */
88 SOI = 0xd8, /* start of image */
89 EOI = 0xd9, /* end of image */
90 SOS = 0xda, /* start of scan */
91 DQT = 0xdb, /* define quantization tables */
92 DNL = 0xdc, /* define number of lines */
93 DRI = 0xdd, /* define restart interval */
94 DHP = 0xde, /* define hierarchical progression */
95 EXP = 0xdf, /* expand reference components */
121 SOF48 = 0xf7, ///< JPEG-LS
122 LSE = 0xf8, ///< JPEG-LS extension parameters
129 COM = 0xfe, /* comment */
131 TEM = 0x01, /* temporary private use for arithmetic coding */
133 /* 0x02 -> 0xbf reserved */
137 /* These are the sample quantization tables given in JPEG spec section K.1.
138 * The spec says that the values given produce "good" quality, and
139 * when divided by 2, "very good" quality.
141 static const unsigned char std_luminance_quant_tbl[64] = {
142 16, 11, 10, 16, 24, 40, 51, 61,
143 12, 12, 14, 19, 26, 58, 60, 55,
144 14, 13, 16, 24, 40, 57, 69, 56,
145 14, 17, 22, 29, 51, 87, 80, 62,
146 18, 22, 37, 56, 68, 109, 103, 77,
147 24, 35, 55, 64, 81, 104, 113, 92,
148 49, 64, 78, 87, 103, 121, 120, 101,
149 72, 92, 95, 98, 112, 100, 103, 99
151 static const unsigned char std_chrominance_quant_tbl[64] = {
152 17, 18, 24, 47, 99, 99, 99, 99,
153 18, 21, 26, 66, 99, 99, 99, 99,
154 24, 26, 56, 99, 99, 99, 99, 99,
155 47, 66, 99, 99, 99, 99, 99, 99,
156 99, 99, 99, 99, 99, 99, 99, 99,
157 99, 99, 99, 99, 99, 99, 99, 99,
158 99, 99, 99, 99, 99, 99, 99, 99,
159 99, 99, 99, 99, 99, 99, 99, 99
163 /* Set up the standard Huffman tables (cf. JPEG standard section K.3) */
164 /* IMPORTANT: these are only valid for 8-bit data precision! */
165 static const uint8_t bits_dc_luminance[17] =
166 { /* 0-base */ 0, 0, 1, 5, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0 };
167 static const uint8_t val_dc_luminance[] =
168 { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11 };
170 static const uint8_t bits_dc_chrominance[17] =
171 { /* 0-base */ 0, 0, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0 };
172 static const uint8_t val_dc_chrominance[] =
173 { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11 };
175 static const uint8_t bits_ac_luminance[17] =
176 { /* 0-base */ 0, 0, 2, 1, 3, 3, 2, 4, 3, 5, 5, 4, 4, 0, 0, 1, 0x7d };
177 static const uint8_t val_ac_luminance[] =
178 { 0x01, 0x02, 0x03, 0x00, 0x04, 0x11, 0x05, 0x12,
179 0x21, 0x31, 0x41, 0x06, 0x13, 0x51, 0x61, 0x07,
180 0x22, 0x71, 0x14, 0x32, 0x81, 0x91, 0xa1, 0x08,
181 0x23, 0x42, 0xb1, 0xc1, 0x15, 0x52, 0xd1, 0xf0,
182 0x24, 0x33, 0x62, 0x72, 0x82, 0x09, 0x0a, 0x16,
183 0x17, 0x18, 0x19, 0x1a, 0x25, 0x26, 0x27, 0x28,
184 0x29, 0x2a, 0x34, 0x35, 0x36, 0x37, 0x38, 0x39,
185 0x3a, 0x43, 0x44, 0x45, 0x46, 0x47, 0x48, 0x49,
186 0x4a, 0x53, 0x54, 0x55, 0x56, 0x57, 0x58, 0x59,
187 0x5a, 0x63, 0x64, 0x65, 0x66, 0x67, 0x68, 0x69,
188 0x6a, 0x73, 0x74, 0x75, 0x76, 0x77, 0x78, 0x79,
189 0x7a, 0x83, 0x84, 0x85, 0x86, 0x87, 0x88, 0x89,
190 0x8a, 0x92, 0x93, 0x94, 0x95, 0x96, 0x97, 0x98,
191 0x99, 0x9a, 0xa2, 0xa3, 0xa4, 0xa5, 0xa6, 0xa7,
192 0xa8, 0xa9, 0xaa, 0xb2, 0xb3, 0xb4, 0xb5, 0xb6,
193 0xb7, 0xb8, 0xb9, 0xba, 0xc2, 0xc3, 0xc4, 0xc5,
194 0xc6, 0xc7, 0xc8, 0xc9, 0xca, 0xd2, 0xd3, 0xd4,
195 0xd5, 0xd6, 0xd7, 0xd8, 0xd9, 0xda, 0xe1, 0xe2,
196 0xe3, 0xe4, 0xe5, 0xe6, 0xe7, 0xe8, 0xe9, 0xea,
197 0xf1, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7, 0xf8,
201 static const uint8_t bits_ac_chrominance[17] =
202 { /* 0-base */ 0, 0, 2, 1, 2, 4, 4, 3, 4, 7, 5, 4, 4, 0, 1, 2, 0x77 };
204 static const uint8_t val_ac_chrominance[] =
205 { 0x00, 0x01, 0x02, 0x03, 0x11, 0x04, 0x05, 0x21,
206 0x31, 0x06, 0x12, 0x41, 0x51, 0x07, 0x61, 0x71,
207 0x13, 0x22, 0x32, 0x81, 0x08, 0x14, 0x42, 0x91,
208 0xa1, 0xb1, 0xc1, 0x09, 0x23, 0x33, 0x52, 0xf0,
209 0x15, 0x62, 0x72, 0xd1, 0x0a, 0x16, 0x24, 0x34,
210 0xe1, 0x25, 0xf1, 0x17, 0x18, 0x19, 0x1a, 0x26,
211 0x27, 0x28, 0x29, 0x2a, 0x35, 0x36, 0x37, 0x38,
212 0x39, 0x3a, 0x43, 0x44, 0x45, 0x46, 0x47, 0x48,
213 0x49, 0x4a, 0x53, 0x54, 0x55, 0x56, 0x57, 0x58,
214 0x59, 0x5a, 0x63, 0x64, 0x65, 0x66, 0x67, 0x68,
215 0x69, 0x6a, 0x73, 0x74, 0x75, 0x76, 0x77, 0x78,
216 0x79, 0x7a, 0x82, 0x83, 0x84, 0x85, 0x86, 0x87,
217 0x88, 0x89, 0x8a, 0x92, 0x93, 0x94, 0x95, 0x96,
218 0x97, 0x98, 0x99, 0x9a, 0xa2, 0xa3, 0xa4, 0xa5,
219 0xa6, 0xa7, 0xa8, 0xa9, 0xaa, 0xb2, 0xb3, 0xb4,
220 0xb5, 0xb6, 0xb7, 0xb8, 0xb9, 0xba, 0xc2, 0xc3,
221 0xc4, 0xc5, 0xc6, 0xc7, 0xc8, 0xc9, 0xca, 0xd2,
222 0xd3, 0xd4, 0xd5, 0xd6, 0xd7, 0xd8, 0xd9, 0xda,
223 0xe2, 0xe3, 0xe4, 0xe5, 0xe6, 0xe7, 0xe8, 0xe9,
224 0xea, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7, 0xf8,
228 /* isn't this function nicer than the one in the libjpeg ? */
229 static void build_huffman_codes(uint8_t *huff_size, uint16_t *huff_code,
230 const uint8_t *bits_table, const uint8_t *val_table)
232 int i, j, k,nb, code, sym;
239 sym = val_table[k++];
241 huff_code[sym] = code;
248 #ifdef CONFIG_ENCODERS
249 int mjpeg_init(MpegEncContext *s)
253 m = av_malloc(sizeof(MJpegContext));
260 /* build all the huffman tables */
261 build_huffman_codes(m->huff_size_dc_luminance,
262 m->huff_code_dc_luminance,
265 build_huffman_codes(m->huff_size_dc_chrominance,
266 m->huff_code_dc_chrominance,
269 build_huffman_codes(m->huff_size_ac_luminance,
270 m->huff_code_ac_luminance,
273 build_huffman_codes(m->huff_size_ac_chrominance,
274 m->huff_code_ac_chrominance,
282 void mjpeg_close(MpegEncContext *s)
284 av_free(s->mjpeg_ctx);
286 #endif //CONFIG_ENCODERS
288 #define PREDICT(ret, topleft, top, left, predictor)\
290 case 1: ret= left; break;\
291 case 2: ret= top; break;\
292 case 3: ret= topleft; break;\
293 case 4: ret= left + top - topleft; break;\
294 case 5: ret= left + ((top - topleft)>>1); break;\
295 case 6: ret= top + ((left - topleft)>>1); break;\
297 case 7: ret= (left + top)>>1; break;\
300 #ifdef CONFIG_ENCODERS
301 static inline void put_marker(PutBitContext *p, int code)
303 put_bits(p, 8, 0xff);
304 put_bits(p, 8, code);
307 /* table_class: 0 = DC coef, 1 = AC coefs */
308 static int put_huffman_table(MpegEncContext *s, int table_class, int table_id,
309 const uint8_t *bits_table, const uint8_t *value_table)
311 PutBitContext *p = &s->pb;
314 put_bits(p, 4, table_class);
315 put_bits(p, 4, table_id);
320 put_bits(p, 8, bits_table[i]);
324 put_bits(p, 8, value_table[i]);
329 static void jpeg_table_header(MpegEncContext *s)
331 PutBitContext *p = &s->pb;
338 put_bits(p, 16, 2 + 2 * (1 + 64));
340 put_bits(p, 16, 2 + 1 * (1 + 64));
342 put_bits(p, 4, 0); /* 8 bit precision */
343 put_bits(p, 4, 0); /* table 0 */
345 j = s->intra_scantable.permutated[i];
346 put_bits(p, 8, s->intra_matrix[j]);
349 put_bits(p, 4, 0); /* 8 bit precision */
350 put_bits(p, 4, 1); /* table 1 */
352 j = s->intra_scantable.permutated[i];
353 put_bits(p, 8, s->chroma_intra_matrix[j]);
361 put_bits(p, 16, 0); /* patched later */
363 size += put_huffman_table(s, 0, 0, bits_dc_luminance, val_dc_luminance);
364 size += put_huffman_table(s, 0, 1, bits_dc_chrominance, val_dc_chrominance);
366 size += put_huffman_table(s, 1, 0, bits_ac_luminance, val_ac_luminance);
367 size += put_huffman_table(s, 1, 1, bits_ac_chrominance, val_ac_chrominance);
372 static void jpeg_put_comments(MpegEncContext *s)
374 PutBitContext *p = &s->pb;
378 if (s->aspect_ratio_info /* && !lossless */)
383 ff_put_string(p, "JFIF", 1); /* this puts the trailing zero-byte too */
384 put_bits(p, 16, 0x0201); /* v 1.02 */
385 put_bits(p, 8, 0); /* units type: 0 - aspect ratio */
386 put_bits(p, 16, s->avctx->sample_aspect_ratio.num);
387 put_bits(p, 16, s->avctx->sample_aspect_ratio.den);
388 put_bits(p, 8, 0); /* thumbnail width */
389 put_bits(p, 8, 0); /* thumbnail height */
393 if(!(s->flags & CODEC_FLAG_BITEXACT)){
397 put_bits(p, 16, 0); /* patched later */
398 ff_put_string(p, LIBAVCODEC_IDENT, 1);
399 size = strlen(LIBAVCODEC_IDENT)+3;
404 if( s->avctx->pix_fmt == PIX_FMT_YUV420P
405 ||s->avctx->pix_fmt == PIX_FMT_YUV422P
406 ||s->avctx->pix_fmt == PIX_FMT_YUV444P){
410 put_bits(p, 16, 0); /* patched later */
411 ff_put_string(p, "CS=ITU601", 1);
412 size = strlen("CS=ITU601")+3;
418 void mjpeg_picture_header(MpegEncContext *s)
420 const int lossless= s->avctx->codec_id != CODEC_ID_MJPEG;
421 const int ls = s->avctx->codec_id == CODEC_ID_JPEGLS;
423 assert(!(ls && s->mjpeg_write_tables));
425 put_marker(&s->pb, SOI);
427 if (!s->mjpeg_data_only_frames)
429 jpeg_put_comments(s);
431 if (s->mjpeg_write_tables) jpeg_table_header(s);
433 switch(s->avctx->codec_id){
434 case CODEC_ID_MJPEG: put_marker(&s->pb, SOF0 ); break;
435 case CODEC_ID_LJPEG: put_marker(&s->pb, SOF3 ); break;
436 case CODEC_ID_JPEGLS: put_marker(&s->pb, SOF48); break;
440 put_bits(&s->pb, 16, 17);
441 if(lossless && s->avctx->pix_fmt == PIX_FMT_RGBA32)
442 put_bits(&s->pb, 8, 9); /* 9 bits/component RCT */
444 put_bits(&s->pb, 8, 8); /* 8 bits/component */
445 put_bits(&s->pb, 16, s->height);
446 put_bits(&s->pb, 16, s->width);
447 put_bits(&s->pb, 8, 3); /* 3 components */
450 put_bits(&s->pb, 8, 1); /* component number */
451 put_bits(&s->pb, 4, s->mjpeg_hsample[0]); /* H factor */
452 put_bits(&s->pb, 4, s->mjpeg_vsample[0]); /* V factor */
453 put_bits(&s->pb, 8, 0); /* select matrix */
456 put_bits(&s->pb, 8, 2); /* component number */
457 put_bits(&s->pb, 4, s->mjpeg_hsample[1]); /* H factor */
458 put_bits(&s->pb, 4, s->mjpeg_vsample[1]); /* V factor */
460 put_bits(&s->pb, 8, lossless ? 0 : 1); /* select matrix */
462 put_bits(&s->pb, 8, 0); /* select matrix */
466 put_bits(&s->pb, 8, 3); /* component number */
467 put_bits(&s->pb, 4, s->mjpeg_hsample[2]); /* H factor */
468 put_bits(&s->pb, 4, s->mjpeg_vsample[2]); /* V factor */
470 put_bits(&s->pb, 8, lossless ? 0 : 1); /* select matrix */
472 put_bits(&s->pb, 8, 0); /* select matrix */
477 put_marker(&s->pb, SOS);
478 put_bits(&s->pb, 16, 12); /* length */
479 put_bits(&s->pb, 8, 3); /* 3 components */
482 put_bits(&s->pb, 8, 1); /* index */
483 put_bits(&s->pb, 4, 0); /* DC huffman table index */
484 put_bits(&s->pb, 4, 0); /* AC huffman table index */
487 put_bits(&s->pb, 8, 2); /* index */
488 put_bits(&s->pb, 4, 1); /* DC huffman table index */
489 put_bits(&s->pb, 4, lossless ? 0 : 1); /* AC huffman table index */
492 put_bits(&s->pb, 8, 3); /* index */
493 put_bits(&s->pb, 4, 1); /* DC huffman table index */
494 put_bits(&s->pb, 4, lossless ? 0 : 1); /* AC huffman table index */
496 put_bits(&s->pb, 8, (lossless && !ls) ? s->avctx->prediction_method+1 : 0); /* Ss (not used) */
498 switch(s->avctx->codec_id){
499 case CODEC_ID_MJPEG: put_bits(&s->pb, 8, 63); break; /* Se (not used) */
500 case CODEC_ID_LJPEG: put_bits(&s->pb, 8, 0); break; /* not used */
501 case CODEC_ID_JPEGLS: put_bits(&s->pb, 8, 1); break; /* ILV = line interleaved */
505 put_bits(&s->pb, 8, 0); /* Ah/Al (not used) */
507 //FIXME DC/AC entropy table selectors stuff in jpegls
510 static void escape_FF(MpegEncContext *s, int start)
512 int size= put_bits_count(&s->pb) - start*8;
514 uint8_t *buf= s->pb.buf + start;
515 int align= (-(size_t)(buf))&3;
517 assert((size&7) == 0);
521 for(i=0; i<size && i<align; i++){
522 if(buf[i]==0xFF) ff_count++;
524 for(; i<size-15; i+=16){
527 v= *(uint32_t*)(&buf[i]);
528 acc= (((v & (v>>4))&0x0F0F0F0F)+0x01010101)&0x10101010;
529 v= *(uint32_t*)(&buf[i+4]);
530 acc+=(((v & (v>>4))&0x0F0F0F0F)+0x01010101)&0x10101010;
531 v= *(uint32_t*)(&buf[i+8]);
532 acc+=(((v & (v>>4))&0x0F0F0F0F)+0x01010101)&0x10101010;
533 v= *(uint32_t*)(&buf[i+12]);
534 acc+=(((v & (v>>4))&0x0F0F0F0F)+0x01010101)&0x10101010;
542 if(buf[i]==0xFF) ff_count++;
545 if(ff_count==0) return;
548 for(i=0; i<ff_count-3; i+=4)
549 put_bits(&s->pb, 32, 0);
550 put_bits(&s->pb, (ff_count-i)*8, 0);
551 flush_put_bits(&s->pb);
553 for(i=size-1; ff_count; i--){
557 //printf("%d %d\n", i, ff_count);
566 void ff_mjpeg_stuffing(PutBitContext * pbc)
569 length= (-put_bits_count(pbc))&7;
570 if(length) put_bits(pbc, length, (1<<length)-1);
573 void mjpeg_picture_trailer(MpegEncContext *s)
575 ff_mjpeg_stuffing(&s->pb);
576 flush_put_bits(&s->pb);
578 assert((s->header_bits&7)==0);
580 escape_FF(s, s->header_bits>>3);
582 put_marker(&s->pb, EOI);
585 static inline void mjpeg_encode_dc(MpegEncContext *s, int val,
586 uint8_t *huff_size, uint16_t *huff_code)
591 put_bits(&s->pb, huff_size[0], huff_code[0]);
599 nbits= av_log2_16bit(val) + 1;
601 put_bits(&s->pb, huff_size[nbits], huff_code[nbits]);
603 put_bits(&s->pb, nbits, mant & ((1 << nbits) - 1));
607 static void encode_block(MpegEncContext *s, DCTELEM *block, int n)
609 int mant, nbits, code, i, j;
610 int component, dc, run, last_index, val;
611 MJpegContext *m = s->mjpeg_ctx;
612 uint8_t *huff_size_ac;
613 uint16_t *huff_code_ac;
616 component = (n <= 3 ? 0 : n - 4 + 1);
617 dc = block[0]; /* overflow is impossible */
618 val = dc - s->last_dc[component];
620 mjpeg_encode_dc(s, val, m->huff_size_dc_luminance, m->huff_code_dc_luminance);
621 huff_size_ac = m->huff_size_ac_luminance;
622 huff_code_ac = m->huff_code_ac_luminance;
624 mjpeg_encode_dc(s, val, m->huff_size_dc_chrominance, m->huff_code_dc_chrominance);
625 huff_size_ac = m->huff_size_ac_chrominance;
626 huff_code_ac = m->huff_code_ac_chrominance;
628 s->last_dc[component] = dc;
633 last_index = s->block_last_index[n];
634 for(i=1;i<=last_index;i++) {
635 j = s->intra_scantable.permutated[i];
641 put_bits(&s->pb, huff_size_ac[0xf0], huff_code_ac[0xf0]);
650 nbits= av_log2(val) + 1;
651 code = (run << 4) | nbits;
653 put_bits(&s->pb, huff_size_ac[code], huff_code_ac[code]);
655 put_bits(&s->pb, nbits, mant & ((1 << nbits) - 1));
660 /* output EOB only if not already 64 values */
661 if (last_index < 63 || run != 0)
662 put_bits(&s->pb, huff_size_ac[0], huff_code_ac[0]);
665 void mjpeg_encode_mb(MpegEncContext *s,
666 DCTELEM block[6][64])
670 encode_block(s, block[i], i);
674 static int encode_picture_lossless(AVCodecContext *avctx, unsigned char *buf, int buf_size, void *data){
675 MpegEncContext * const s = avctx->priv_data;
676 MJpegContext * const m = s->mjpeg_ctx;
677 AVFrame *pict = data;
678 const int width= s->width;
679 const int height= s->height;
680 AVFrame * const p= (AVFrame*)&s->current_picture;
681 const int predictor= avctx->prediction_method+1;
683 init_put_bits(&s->pb, buf, buf_size);
686 p->pict_type= FF_I_TYPE;
689 mjpeg_picture_header(s);
691 s->header_bits= put_bits_count(&s->pb);
693 if(avctx->pix_fmt == PIX_FMT_RGBA32){
695 const int linesize= p->linesize[0];
696 uint16_t (*buffer)[4]= (void *) s->rd_scratchpad;
697 int left[3], top[3], topleft[3];
700 buffer[0][i]= 1 << (9 - 1);
703 for(y = 0; y < height; y++) {
704 const int modified_predictor= y ? predictor : 1;
705 uint8_t *ptr = p->data[0] + (linesize * y);
707 if(s->pb.buf_end - s->pb.buf - (put_bits_count(&s->pb)>>3) < width*3*4){
708 av_log(s->avctx, AV_LOG_ERROR, "encoded frame too large\n");
713 top[i]= left[i]= topleft[i]= buffer[0][i];
715 for(x = 0; x < width; x++) {
716 buffer[x][1] = ptr[4*x+0] - ptr[4*x+1] + 0x100;
717 buffer[x][2] = ptr[4*x+2] - ptr[4*x+1] + 0x100;
718 buffer[x][0] = (ptr[4*x+0] + 2*ptr[4*x+1] + ptr[4*x+2])>>2;
723 PREDICT(pred, topleft[i], top[i], left[i], modified_predictor);
726 top[i]= buffer[x+1][i];
728 left[i]= buffer[x][i];
730 diff= ((left[i] - pred + 0x100)&0x1FF) - 0x100;
733 mjpeg_encode_dc(s, diff, m->huff_size_dc_luminance, m->huff_code_dc_luminance); //FIXME ugly
735 mjpeg_encode_dc(s, diff, m->huff_size_dc_chrominance, m->huff_code_dc_chrominance);
741 const int mb_width = (width + s->mjpeg_hsample[0] - 1) / s->mjpeg_hsample[0];
742 const int mb_height = (height + s->mjpeg_vsample[0] - 1) / s->mjpeg_vsample[0];
744 for(mb_y = 0; mb_y < mb_height; mb_y++) {
745 if(s->pb.buf_end - s->pb.buf - (put_bits_count(&s->pb)>>3) < mb_width * 4 * 3 * s->mjpeg_hsample[0] * s->mjpeg_vsample[0]){
746 av_log(s->avctx, AV_LOG_ERROR, "encoded frame too large\n");
749 for(mb_x = 0; mb_x < mb_width; mb_x++) {
750 if(mb_x==0 || mb_y==0){
753 int x, y, h, v, linesize;
754 h = s->mjpeg_hsample[i];
755 v = s->mjpeg_vsample[i];
756 linesize= p->linesize[i];
762 ptr = p->data[i] + (linesize * (v * mb_y + y)) + (h * mb_x + x); //FIXME optimize this crap
771 pred= ptr[-linesize];
773 PREDICT(pred, ptr[-linesize-1], ptr[-linesize], ptr[-1], predictor);
778 mjpeg_encode_dc(s, (int8_t)(*ptr - pred), m->huff_size_dc_luminance, m->huff_code_dc_luminance); //FIXME ugly
780 mjpeg_encode_dc(s, (int8_t)(*ptr - pred), m->huff_size_dc_chrominance, m->huff_code_dc_chrominance);
787 int x, y, h, v, linesize;
788 h = s->mjpeg_hsample[i];
789 v = s->mjpeg_vsample[i];
790 linesize= p->linesize[i];
796 ptr = p->data[i] + (linesize * (v * mb_y + y)) + (h * mb_x + x); //FIXME optimize this crap
797 //printf("%d %d %d %d %8X\n", mb_x, mb_y, x, y, ptr);
798 PREDICT(pred, ptr[-linesize-1], ptr[-linesize], ptr[-1], predictor);
801 mjpeg_encode_dc(s, (int8_t)(*ptr - pred), m->huff_size_dc_luminance, m->huff_code_dc_luminance); //FIXME ugly
803 mjpeg_encode_dc(s, (int8_t)(*ptr - pred), m->huff_size_dc_chrominance, m->huff_code_dc_chrominance);
814 mjpeg_picture_trailer(s);
817 flush_put_bits(&s->pb);
818 return pbBufPtr(&s->pb) - s->pb.buf;
819 // return (put_bits_count(&f->pb)+7)/8;
822 #endif //CONFIG_ENCODERS
824 /******************************************/
827 #define MAX_COMPONENTS 4
829 typedef struct MJpegDecodeContext {
830 AVCodecContext *avctx;
832 int mpeg_enc_ctx_allocated; /* true if decoding context allocated */
834 int start_code; /* current start code */
838 int16_t quant_matrixes[4][64];
840 int qscale[4]; ///< quantizer scale calculated from quant_matrixes
842 int org_height; /* size given at codec init */
843 int first_picture; /* true if decoding first picture */
844 int interlaced; /* true if interlaced */
845 int bottom_field; /* true if bottom field */
849 int rct; /* standard rct */
850 int pegasus_rct; /* pegasus reversible colorspace transform */
851 int bits; /* bits per component */
854 int near; ///< near lossless bound (si 0 for lossless)
856 int reset; ///< context halfing intervall ?rename
859 int mb_width, mb_height;
861 int component_id[MAX_COMPONENTS];
862 int h_count[MAX_COMPONENTS]; /* horizontal and vertical count for each component */
863 int v_count[MAX_COMPONENTS];
864 int comp_index[MAX_COMPONENTS];
865 int dc_index[MAX_COMPONENTS];
866 int ac_index[MAX_COMPONENTS];
867 int nb_blocks[MAX_COMPONENTS];
868 int h_scount[MAX_COMPONENTS];
869 int v_scount[MAX_COMPONENTS];
870 int h_max, v_max; /* maximum h and v counts */
871 int quant_index[4]; /* quant table index for each component */
872 int last_dc[MAX_COMPONENTS]; /* last DEQUANTIZED dc (XXX: am I right to do that ?) */
873 AVFrame picture; /* picture structure */
874 int linesize[MAX_COMPONENTS]; ///< linesize << interlaced
875 int8_t *qscale_table;
876 DECLARE_ALIGNED_8(DCTELEM, block[64]);
878 void (*idct_put)(uint8_t *dest/*align 8*/, int line_size, DCTELEM *block/*align 16*/);
880 int restart_interval;
885 int interlace_polarity;
889 int cur_scan; /* current scan, used by JPEG-LS */
890 } MJpegDecodeContext;
892 #include "jpeg_ls.c" //FIXME make jpeg-ls more independant
894 static int mjpeg_decode_dht(MJpegDecodeContext *s);
896 static int build_vlc(VLC *vlc, const uint8_t *bits_table, const uint8_t *val_table,
897 int nb_codes, int use_static, int is_ac)
899 uint8_t huff_size[256+16];
900 uint16_t huff_code[256+16];
902 assert(nb_codes <= 256);
904 memset(huff_size, 0, sizeof(huff_size));
905 build_huffman_codes(huff_size, huff_code, bits_table, val_table);
908 memmove(huff_size+16, huff_size, sizeof(uint8_t)*nb_codes);
909 memmove(huff_code+16, huff_code, sizeof(uint16_t)*nb_codes);
910 memset(huff_size, 0, sizeof(uint8_t)*16);
911 memset(huff_code, 0, sizeof(uint16_t)*16);
915 return init_vlc(vlc, 9, nb_codes, huff_size, 1, 1, huff_code, 2, 2, use_static);
918 static int mjpeg_decode_init(AVCodecContext *avctx)
920 MJpegDecodeContext *s = avctx->priv_data;
922 memset(s, 0, sizeof(MJpegDecodeContext));
926 /* ugly way to get the idct & scantable FIXME */
927 memset(&s2, 0, sizeof(MpegEncContext));
929 // s2->out_format = FMT_MJPEG;
930 dsputil_init(&s2.dsp, avctx);
931 DCT_common_init(&s2);
933 s->scantable= s2.intra_scantable;
934 s->idct_put= s2.dsp.idct_put;
936 s->mpeg_enc_ctx_allocated = 0;
940 s->first_picture = 1;
941 s->org_height = avctx->coded_height;
943 build_vlc(&s->vlcs[0][0], bits_dc_luminance, val_dc_luminance, 12, 0, 0);
944 build_vlc(&s->vlcs[0][1], bits_dc_chrominance, val_dc_chrominance, 12, 0, 0);
945 build_vlc(&s->vlcs[1][0], bits_ac_luminance, val_ac_luminance, 251, 0, 1);
946 build_vlc(&s->vlcs[1][1], bits_ac_chrominance, val_ac_chrominance, 251, 0, 1);
948 if (avctx->flags & CODEC_FLAG_EXTERN_HUFF)
950 av_log(avctx, AV_LOG_INFO, "mjpeg: using external huffman table\n");
951 init_get_bits(&s->gb, avctx->extradata, avctx->extradata_size*8);
953 /* should check for error - but dunno */
961 * finds the end of the current frame in the bitstream.
962 * @return the position of the first byte of the next frame, or -1
964 static int find_frame_end(ParseContext *pc, const uint8_t *buf, int buf_size){
968 vop_found= pc->frame_start_found;
973 for(i=0; i<buf_size; i++){
974 state= (state<<8) | buf[i];
984 /* EOF considered as end of frame */
987 for(; i<buf_size; i++){
988 state= (state<<8) | buf[i];
990 pc->frame_start_found=0;
996 pc->frame_start_found= vop_found;
998 return END_NOT_FOUND;
1001 static int jpeg_parse(AVCodecParserContext *s,
1002 AVCodecContext *avctx,
1003 uint8_t **poutbuf, int *poutbuf_size,
1004 const uint8_t *buf, int buf_size)
1006 ParseContext *pc = s->priv_data;
1009 next= find_frame_end(pc, buf, buf_size);
1011 if (ff_combine_frame(pc, next, (uint8_t **)&buf, &buf_size) < 0) {
1017 *poutbuf = (uint8_t *)buf;
1018 *poutbuf_size = buf_size;
1022 /* quantize tables */
1023 static int mjpeg_decode_dqt(MJpegDecodeContext *s)
1025 int len, index, i, j;
1027 len = get_bits(&s->gb, 16) - 2;
1030 /* only 8 bit precision handled */
1031 if (get_bits(&s->gb, 4) != 0)
1033 dprintf("dqt: 16bit precision\n");
1036 index = get_bits(&s->gb, 4);
1039 dprintf("index=%d\n", index);
1040 /* read quant table */
1042 j = s->scantable.permutated[i];
1043 s->quant_matrixes[index][j] = get_bits(&s->gb, 8);
1046 //XXX FIXME finetune, and perhaps add dc too
1047 s->qscale[index]= FFMAX(
1048 s->quant_matrixes[index][s->scantable.permutated[1]],
1049 s->quant_matrixes[index][s->scantable.permutated[8]]) >> 1;
1050 dprintf("qscale[%d]: %d\n", index, s->qscale[index]);
1057 /* decode huffman tables and build VLC decoders */
1058 static int mjpeg_decode_dht(MJpegDecodeContext *s)
1060 int len, index, i, class, n, v, code_max;
1061 uint8_t bits_table[17];
1062 uint8_t val_table[256];
1064 len = get_bits(&s->gb, 16) - 2;
1069 class = get_bits(&s->gb, 4);
1072 index = get_bits(&s->gb, 4);
1076 for(i=1;i<=16;i++) {
1077 bits_table[i] = get_bits(&s->gb, 8);
1081 if (len < n || n > 256)
1086 v = get_bits(&s->gb, 8);
1093 /* build VLC and flush previous vlc if present */
1094 free_vlc(&s->vlcs[class][index]);
1095 dprintf("class=%d index=%d nb_codes=%d\n",
1096 class, index, code_max + 1);
1097 if(build_vlc(&s->vlcs[class][index], bits_table, val_table, code_max + 1, 0, class > 0) < 0){
1104 static int mjpeg_decode_sof(MJpegDecodeContext *s)
1106 int len, nb_components, i, width, height;
1108 /* XXX: verify len field validity */
1109 len = get_bits(&s->gb, 16);
1110 s->bits= get_bits(&s->gb, 8);
1112 if(s->pegasus_rct) s->bits=9;
1113 if(s->bits==9 && !s->pegasus_rct) s->rct=1; //FIXME ugly
1115 if (s->bits != 8 && !s->lossless){
1116 av_log(s->avctx, AV_LOG_ERROR, "only 8 bits/component accepted\n");
1119 if (s->bits > 8 && s->ls){
1120 av_log(s->avctx, AV_LOG_ERROR, "only <= 8 bits/component accepted for JPEG-LS\n");
1124 height = get_bits(&s->gb, 16);
1125 width = get_bits(&s->gb, 16);
1127 dprintf("sof0: picture: %dx%d\n", width, height);
1128 if(avcodec_check_dimensions(s->avctx, width, height))
1131 nb_components = get_bits(&s->gb, 8);
1132 if (nb_components <= 0 ||
1133 nb_components > MAX_COMPONENTS)
1135 s->nb_components = nb_components;
1138 for(i=0;i<nb_components;i++) {
1140 s->component_id[i] = get_bits(&s->gb, 8) - 1;
1141 s->h_count[i] = get_bits(&s->gb, 4);
1142 s->v_count[i] = get_bits(&s->gb, 4);
1143 /* compute hmax and vmax (only used in interleaved case) */
1144 if (s->h_count[i] > s->h_max)
1145 s->h_max = s->h_count[i];
1146 if (s->v_count[i] > s->v_max)
1147 s->v_max = s->v_count[i];
1148 s->quant_index[i] = get_bits(&s->gb, 8);
1149 if (s->quant_index[i] >= 4)
1151 dprintf("component %d %d:%d id: %d quant:%d\n", i, s->h_count[i],
1152 s->v_count[i], s->component_id[i], s->quant_index[i]);
1155 if(s->ls && (s->h_max > 1 || s->v_max > 1)) {
1156 av_log(s->avctx, AV_LOG_ERROR, "Subsampling in JPEG-LS is not supported.\n");
1160 if(s->v_max==1 && s->h_max==1 && s->lossless==1) s->rgb=1;
1162 /* if different size, realloc/alloc picture */
1163 /* XXX: also check h_count and v_count */
1164 if (width != s->width || height != s->height) {
1165 av_freep(&s->qscale_table);
1170 /* test interlaced mode */
1171 if (s->first_picture &&
1172 s->org_height != 0 &&
1173 s->height < ((s->org_height * 3) / 4)) {
1175 // s->bottom_field = (s->interlace_polarity) ? 1 : 0;
1176 s->bottom_field = 0;
1180 avcodec_set_dimensions(s->avctx, width, height);
1182 s->qscale_table= av_mallocz((s->width+15)/16);
1184 s->first_picture = 0;
1187 if(s->interlaced && s->bottom_field)
1190 /* XXX: not complete test ! */
1191 switch((s->h_count[0] << 4) | s->v_count[0]) {
1194 s->avctx->pix_fmt = PIX_FMT_RGBA32;
1195 }else if(s->nb_components==3)
1196 s->avctx->pix_fmt = s->cs_itu601 ? PIX_FMT_YUV444P : PIX_FMT_YUVJ444P;
1198 s->avctx->pix_fmt = PIX_FMT_GRAY8;
1201 s->avctx->pix_fmt = s->cs_itu601 ? PIX_FMT_YUV422P : PIX_FMT_YUVJ422P;
1205 s->avctx->pix_fmt = s->cs_itu601 ? PIX_FMT_YUV420P : PIX_FMT_YUVJ420P;
1209 if(s->nb_components > 1)
1210 s->avctx->pix_fmt = PIX_FMT_RGB24;
1212 s->avctx->pix_fmt = PIX_FMT_GRAY8;
1215 if(s->picture.data[0])
1216 s->avctx->release_buffer(s->avctx, &s->picture);
1218 s->picture.reference= 0;
1219 if(s->avctx->get_buffer(s->avctx, &s->picture) < 0){
1220 av_log(s->avctx, AV_LOG_ERROR, "get_buffer() failed\n");
1223 s->picture.pict_type= I_TYPE;
1224 s->picture.key_frame= 1;
1227 s->linesize[i]= s->picture.linesize[i] << s->interlaced;
1230 // printf("%d %d %d %d %d %d\n", s->width, s->height, s->linesize[0], s->linesize[1], s->interlaced, s->avctx->height);
1232 if (len != (8+(3*nb_components)))
1234 dprintf("decode_sof0: error, len(%d) mismatch\n", len);
1240 static inline int mjpeg_decode_dc(MJpegDecodeContext *s, int dc_index)
1243 code = get_vlc2(&s->gb, s->vlcs[0][dc_index].table, 9, 2);
1246 dprintf("mjpeg_decode_dc: bad vlc: %d:%d (%p)\n", 0, dc_index,
1247 &s->vlcs[0][dc_index]);
1252 return get_xbits(&s->gb, code);
1257 /* decode block and dequantize */
1258 static int decode_block(MJpegDecodeContext *s, DCTELEM *block,
1259 int component, int dc_index, int ac_index, int16_t *quant_matrix)
1261 int code, i, j, level, val;
1264 val = mjpeg_decode_dc(s, dc_index);
1265 if (val == 0xffff) {
1266 dprintf("error dc\n");
1269 val = val * quant_matrix[0] + s->last_dc[component];
1270 s->last_dc[component] = val;
1274 {OPEN_READER(re, &s->gb)
1276 UPDATE_CACHE(re, &s->gb);
1277 GET_VLC(code, re, &s->gb, s->vlcs[1][ac_index].table, 9, 2)
1282 i += ((unsigned)code) >> 4;
1285 if(code > MIN_CACHE_BITS - 16){
1286 UPDATE_CACHE(re, &s->gb)
1289 int cache=GET_CACHE(re,&s->gb);
1290 int sign=(~cache)>>31;
1291 level = (NEG_USR32(sign ^ cache,code) ^ sign) - sign;
1294 LAST_SKIP_BITS(re, &s->gb, code)
1298 j = s->scantable.permutated[63];
1299 block[j] = level * quant_matrix[j];
1302 dprintf("error count: %d\n", i);
1305 j = s->scantable.permutated[i];
1306 block[j] = level * quant_matrix[j];
1309 CLOSE_READER(re, &s->gb)}
1314 static int ljpeg_decode_rgb_scan(MJpegDecodeContext *s, int predictor, int point_transform){
1316 uint16_t buffer[32768][4];
1317 int left[3], top[3], topleft[3];
1318 const int linesize= s->linesize[0];
1319 const int mask= (1<<s->bits)-1;
1321 if((unsigned)s->mb_width > 32768) //dynamic alloc
1325 buffer[0][i]= 1 << (s->bits + point_transform - 1);
1327 for(mb_y = 0; mb_y < s->mb_height; mb_y++) {
1328 const int modified_predictor= mb_y ? predictor : 1;
1329 uint8_t *ptr = s->picture.data[0] + (linesize * mb_y);
1331 if (s->interlaced && s->bottom_field)
1332 ptr += linesize >> 1;
1335 top[i]= left[i]= topleft[i]= buffer[0][i];
1337 for(mb_x = 0; mb_x < s->mb_width; mb_x++) {
1338 if (s->restart_interval && !s->restart_count)
1339 s->restart_count = s->restart_interval;
1345 top[i]= buffer[mb_x][i];
1347 PREDICT(pred, topleft[i], top[i], left[i], modified_predictor);
1350 buffer[mb_x][i]= mask & (pred + (mjpeg_decode_dc(s, s->dc_index[i]) << point_transform));
1353 if (s->restart_interval && !--s->restart_count) {
1354 align_get_bits(&s->gb);
1355 skip_bits(&s->gb, 16); /* skip RSTn */
1360 for(mb_x = 0; mb_x < s->mb_width; mb_x++) {
1361 ptr[4*mb_x+1] = buffer[mb_x][0] - ((buffer[mb_x][1] + buffer[mb_x][2] - 0x200)>>2);
1362 ptr[4*mb_x+0] = buffer[mb_x][1] + ptr[4*mb_x+1];
1363 ptr[4*mb_x+2] = buffer[mb_x][2] + ptr[4*mb_x+1];
1365 }else if(s->pegasus_rct){
1366 for(mb_x = 0; mb_x < s->mb_width; mb_x++) {
1367 ptr[4*mb_x+1] = buffer[mb_x][0] - ((buffer[mb_x][1] + buffer[mb_x][2])>>2);
1368 ptr[4*mb_x+0] = buffer[mb_x][1] + ptr[4*mb_x+1];
1369 ptr[4*mb_x+2] = buffer[mb_x][2] + ptr[4*mb_x+1];
1372 for(mb_x = 0; mb_x < s->mb_width; mb_x++) {
1373 ptr[4*mb_x+0] = buffer[mb_x][0];
1374 ptr[4*mb_x+1] = buffer[mb_x][1];
1375 ptr[4*mb_x+2] = buffer[mb_x][2];
1382 static int ljpeg_decode_yuv_scan(MJpegDecodeContext *s, int predictor, int point_transform){
1384 const int nb_components=3;
1386 for(mb_y = 0; mb_y < s->mb_height; mb_y++) {
1387 for(mb_x = 0; mb_x < s->mb_width; mb_x++) {
1388 if (s->restart_interval && !s->restart_count)
1389 s->restart_count = s->restart_interval;
1391 if(mb_x==0 || mb_y==0 || s->interlaced){
1392 for(i=0;i<nb_components;i++) {
1394 int n, h, v, x, y, c, j, linesize;
1395 n = s->nb_blocks[i];
1396 c = s->comp_index[i];
1401 linesize= s->linesize[c];
1403 for(j=0; j<n; j++) {
1406 ptr = s->picture.data[c] + (linesize * (v * mb_y + y)) + (h * mb_x + x); //FIXME optimize this crap
1407 if(y==0 && mb_y==0){
1408 if(x==0 && mb_x==0){
1409 pred= 128 << point_transform;
1414 if(x==0 && mb_x==0){
1415 pred= ptr[-linesize];
1417 PREDICT(pred, ptr[-linesize-1], ptr[-linesize], ptr[-1], predictor);
1421 if (s->interlaced && s->bottom_field)
1422 ptr += linesize >> 1;
1423 *ptr= pred + (mjpeg_decode_dc(s, s->dc_index[i]) << point_transform);
1432 for(i=0;i<nb_components;i++) {
1434 int n, h, v, x, y, c, j, linesize;
1435 n = s->nb_blocks[i];
1436 c = s->comp_index[i];
1441 linesize= s->linesize[c];
1443 for(j=0; j<n; j++) {
1446 ptr = s->picture.data[c] + (linesize * (v * mb_y + y)) + (h * mb_x + x); //FIXME optimize this crap
1447 PREDICT(pred, ptr[-linesize-1], ptr[-linesize], ptr[-1], predictor);
1448 *ptr= pred + (mjpeg_decode_dc(s, s->dc_index[i]) << point_transform);
1456 if (s->restart_interval && !--s->restart_count) {
1457 align_get_bits(&s->gb);
1458 skip_bits(&s->gb, 16); /* skip RSTn */
1465 static int mjpeg_decode_scan(MJpegDecodeContext *s){
1467 const int nb_components=3;
1469 for(mb_y = 0; mb_y < s->mb_height; mb_y++) {
1470 for(mb_x = 0; mb_x < s->mb_width; mb_x++) {
1471 if (s->restart_interval && !s->restart_count)
1472 s->restart_count = s->restart_interval;
1474 for(i=0;i<nb_components;i++) {
1476 int n, h, v, x, y, c, j;
1477 n = s->nb_blocks[i];
1478 c = s->comp_index[i];
1484 memset(s->block, 0, sizeof(s->block));
1485 if (decode_block(s, s->block, i,
1486 s->dc_index[i], s->ac_index[i],
1487 s->quant_matrixes[ s->quant_index[c] ]) < 0) {
1488 dprintf("error y=%d x=%d\n", mb_y, mb_x);
1491 // dprintf("mb: %d %d processed\n", mb_y, mb_x);
1492 ptr = s->picture.data[c] +
1493 (((s->linesize[c] * (v * mb_y + y) * 8) +
1494 (h * mb_x + x) * 8) >> s->avctx->lowres);
1495 if (s->interlaced && s->bottom_field)
1496 ptr += s->linesize[c] >> 1;
1497 //av_log(NULL, AV_LOG_DEBUG, "%d %d %d %d %d %d %d %d \n", mb_x, mb_y, x, y, c, s->bottom_field, (v * mb_y + y) * 8, (h * mb_x + x) * 8);
1498 s->idct_put(ptr, s->linesize[c], s->block);
1505 /* (< 1350) buggy workaround for Spectralfan.mov, should be fixed */
1506 if (s->restart_interval && (s->restart_interval < 1350) &&
1507 !--s->restart_count) {
1508 align_get_bits(&s->gb);
1509 skip_bits(&s->gb, 16); /* skip RSTn */
1510 for (i=0; i<nb_components; i++) /* reset dc */
1511 s->last_dc[i] = 1024;
1518 static int mjpeg_decode_sos(MJpegDecodeContext *s)
1520 int len, nb_components, i, h, v, predictor, point_transform;
1521 int vmax, hmax, index, id;
1522 const int block_size= s->lossless ? 1 : 8;
1525 /* XXX: verify len field validity */
1526 len = get_bits(&s->gb, 16);
1527 nb_components = get_bits(&s->gb, 8);
1528 if (len != 6+2*nb_components)
1530 dprintf("decode_sos: invalid len (%d)\n", len);
1533 /* XXX: only interleaved scan accepted */
1534 if ((nb_components != s->nb_components) && !s->ls)
1536 dprintf("decode_sos: components(%d) mismatch\n", nb_components);
1541 for(i=0;i<nb_components;i++) {
1542 id = get_bits(&s->gb, 8) - 1;
1543 dprintf("component: %d\n", id);
1544 /* find component index */
1545 for(index=0;index<s->nb_components;index++)
1546 if (id == s->component_id[index])
1548 if (index == s->nb_components)
1550 dprintf("decode_sos: index(%d) out of components\n", index);
1554 s->comp_index[i] = index;
1556 s->nb_blocks[i] = s->h_count[index] * s->v_count[index];
1557 s->h_scount[i] = s->h_count[index];
1558 s->v_scount[i] = s->v_count[index];
1560 s->dc_index[i] = get_bits(&s->gb, 4);
1561 s->ac_index[i] = get_bits(&s->gb, 4);
1563 if (s->dc_index[i] < 0 || s->ac_index[i] < 0 ||
1564 s->dc_index[i] >= 4 || s->ac_index[i] >= 4)
1567 switch(s->start_code)
1570 if (dc_index[i] > 1 || ac_index[i] > 1)
1575 if (dc_index[i] > 3 || ac_index[i] > 3)
1579 if (dc_index[i] > 3 || ac_index[i] != 0)
1586 predictor= get_bits(&s->gb, 8); /* JPEG Ss / lossless JPEG predictor /JPEG-LS NEAR */
1587 ilv= get_bits(&s->gb, 8); /* JPEG Se / JPEG-LS ILV */
1588 skip_bits(&s->gb, 4); /* Ah */
1589 point_transform= get_bits(&s->gb, 4); /* Al */
1591 for(i=0;i<nb_components;i++)
1592 s->last_dc[i] = 1024;
1594 if (nb_components > 1) {
1595 /* interleaved stream */
1596 s->mb_width = (s->width + s->h_max * block_size - 1) / (s->h_max * block_size);
1597 s->mb_height = (s->height + s->v_max * block_size - 1) / (s->v_max * block_size);
1598 } else if(!s->ls) { /* skip this for JPEG-LS */
1599 h = s->h_max / s->h_scount[s->comp_index[0]];
1600 v = s->v_max / s->v_scount[s->comp_index[0]];
1601 s->mb_width = (s->width + h * block_size - 1) / (h * block_size);
1602 s->mb_height = (s->height + v * block_size - 1) / (v * block_size);
1603 s->nb_blocks[0] = 1;
1608 if(s->avctx->debug & FF_DEBUG_PICT_INFO)
1609 av_log(s->avctx, AV_LOG_DEBUG, "%s %s p:%d >>:%d ilv:%d bits:%d %s\n", s->lossless ? "lossless" : "sequencial DCT", s->rgb ? "RGB" : "",
1610 predictor, point_transform, ilv, s->bits,
1611 s->pegasus_rct ? "PRCT" : (s->rct ? "RCT" : ""));
1614 /* mjpeg-b can have padding bytes between sos and image data, skip them */
1615 for (i = s->mjpb_skiptosod; i > 0; i--)
1616 skip_bits(&s->gb, 8);
1621 // reset_ls_coding_parameters(s, 0);
1623 ls_decode_picture(s, predictor, point_transform, ilv);
1626 if(ljpeg_decode_rgb_scan(s, predictor, point_transform) < 0)
1629 if(ljpeg_decode_yuv_scan(s, predictor, point_transform) < 0)
1634 if(mjpeg_decode_scan(s) < 0)
1640 dprintf("decode_sos: ac/dc index out of range\n");
1644 static int mjpeg_decode_dri(MJpegDecodeContext *s)
1646 if (get_bits(&s->gb, 16) != 4)
1648 s->restart_interval = get_bits(&s->gb, 16);
1649 s->restart_count = 0;
1650 dprintf("restart interval: %d\n", s->restart_interval);
1655 static int mjpeg_decode_app(MJpegDecodeContext *s)
1659 len = get_bits(&s->gb, 16);
1662 if(8*len + get_bits_count(&s->gb) > s->gb.size_in_bits)
1665 id = (get_bits(&s->gb, 16) << 16) | get_bits(&s->gb, 16);
1669 if(s->avctx->debug & FF_DEBUG_STARTCODE){
1670 av_log(s->avctx, AV_LOG_DEBUG, "APPx %8X\n", id);
1673 /* buggy AVID, it puts EOI only at every 10th frame */
1674 /* also this fourcc is used by non-avid files too, it holds some
1675 informations, but it's always present in AVID creates files */
1676 if (id == ff_get_fourcc("AVI1"))
1683 4bytes field_size_less_padding
1686 // if (s->first_picture)
1687 // printf("mjpeg: workarounding buggy AVID\n");
1688 s->interlace_polarity = get_bits(&s->gb, 8);
1690 skip_bits(&s->gb, 8);
1691 skip_bits(&s->gb, 32);
1692 skip_bits(&s->gb, 32);
1695 // if (s->interlace_polarity)
1696 // printf("mjpeg: interlace polarity: %d\n", s->interlace_polarity);
1702 if (id == ff_get_fourcc("JFIF"))
1704 int t_w, t_h, v1, v2;
1705 skip_bits(&s->gb, 8); /* the trailing zero-byte */
1706 v1= get_bits(&s->gb, 8);
1707 v2= get_bits(&s->gb, 8);
1708 skip_bits(&s->gb, 8);
1710 s->avctx->sample_aspect_ratio.num= get_bits(&s->gb, 16);
1711 s->avctx->sample_aspect_ratio.den= get_bits(&s->gb, 16);
1713 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1714 av_log(s->avctx, AV_LOG_INFO, "mjpeg: JFIF header found (version: %x.%x) SAR=%d/%d\n",
1716 s->avctx->sample_aspect_ratio.num,
1717 s->avctx->sample_aspect_ratio.den
1720 t_w = get_bits(&s->gb, 8);
1721 t_h = get_bits(&s->gb, 8);
1724 /* skip thumbnail */
1725 if (len-10-(t_w*t_h*3) > 0)
1732 if (id == ff_get_fourcc("Adob") && (get_bits(&s->gb, 8) == 'e'))
1734 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1735 av_log(s->avctx, AV_LOG_INFO, "mjpeg: Adobe header found\n");
1736 skip_bits(&s->gb, 16); /* version */
1737 skip_bits(&s->gb, 16); /* flags0 */
1738 skip_bits(&s->gb, 16); /* flags1 */
1739 skip_bits(&s->gb, 8); /* transform */
1744 if (id == ff_get_fourcc("LJIF")){
1745 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1746 av_log(s->avctx, AV_LOG_INFO, "Pegasus lossless jpeg header found\n");
1747 skip_bits(&s->gb, 16); /* version ? */
1748 skip_bits(&s->gb, 16); /* unknwon always 0? */
1749 skip_bits(&s->gb, 16); /* unknwon always 0? */
1750 skip_bits(&s->gb, 16); /* unknwon always 0? */
1751 switch( get_bits(&s->gb, 8)){
1761 av_log(s->avctx, AV_LOG_ERROR, "unknown colorspace\n");
1768 if ((s->start_code == APP1) && (len > (0x28 - 8)))
1770 id = (get_bits(&s->gb, 16) << 16) | get_bits(&s->gb, 16);
1773 if (id == ff_get_fourcc("mjpg")) /* Apple MJPEG-A */
1776 skip_bits(&s->gb, 32); /* field size */
1777 skip_bits(&s->gb, 32); /* pad field size */
1778 skip_bits(&s->gb, 32); /* next off */
1779 skip_bits(&s->gb, 32); /* quant off */
1780 skip_bits(&s->gb, 32); /* huff off */
1781 skip_bits(&s->gb, 32); /* image off */
1782 skip_bits(&s->gb, 32); /* scan off */
1783 skip_bits(&s->gb, 32); /* data off */
1785 if (s->avctx->debug & FF_DEBUG_PICT_INFO)
1786 av_log(s->avctx, AV_LOG_INFO, "mjpeg: Apple MJPEG-A header found\n");
1791 /* slow but needed for extreme adobe jpegs */
1793 av_log(s->avctx, AV_LOG_ERROR, "mjpeg: error, decode_app parser read over the end\n");
1795 skip_bits(&s->gb, 8);
1800 static int mjpeg_decode_com(MJpegDecodeContext *s)
1802 int len = get_bits(&s->gb, 16);
1803 if (len >= 2 && 8*len - 16 + get_bits_count(&s->gb) <= s->gb.size_in_bits) {
1804 uint8_t *cbuf = av_malloc(len - 1);
1807 for (i = 0; i < len - 2; i++)
1808 cbuf[i] = get_bits(&s->gb, 8);
1809 if (i > 0 && cbuf[i-1] == '\n')
1814 if(s->avctx->debug & FF_DEBUG_PICT_INFO)
1815 av_log(s->avctx, AV_LOG_INFO, "mjpeg comment: '%s'\n", cbuf);
1817 /* buggy avid, it puts EOI only at every 10th frame */
1818 if (!strcmp(cbuf, "AVID"))
1821 // if (s->first_picture)
1822 // printf("mjpeg: workarounding buggy AVID\n");
1824 else if(!strcmp(cbuf, "CS=ITU601")){
1836 static int valid_marker_list[] =
1838 /* 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, a, b, c, d, e, f */
1839 /* 0 */ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
1840 /* 1 */ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
1841 /* 2 */ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
1842 /* 3 */ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
1843 /* 4 */ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
1844 /* 5 */ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
1845 /* 6 */ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
1846 /* 7 */ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
1847 /* 8 */ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
1848 /* 9 */ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
1849 /* a */ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
1850 /* b */ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
1851 /* c */ 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
1852 /* d */ 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
1853 /* e */ 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
1854 /* f */ 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0,
1858 /* return the 8 bit start code value and update the search
1859 state. Return -1 if no start code found */
1860 static int find_marker(uint8_t **pbuf_ptr, uint8_t *buf_end)
1869 buf_ptr = *pbuf_ptr;
1870 while (buf_ptr < buf_end) {
1873 if ((v == 0xff) && (v2 >= 0xc0) && (v2 <= 0xfe) && buf_ptr < buf_end) {
1884 dprintf("find_marker skipped %d bytes\n", skipped);
1886 *pbuf_ptr = buf_ptr;
1890 static int mjpeg_decode_frame(AVCodecContext *avctx,
1891 void *data, int *data_size,
1892 uint8_t *buf, int buf_size)
1894 MJpegDecodeContext *s = avctx->priv_data;
1895 uint8_t *buf_end, *buf_ptr;
1897 AVFrame *picture = data;
1900 buf_end = buf + buf_size;
1901 while (buf_ptr < buf_end) {
1902 /* find start next marker */
1903 start_code = find_marker(&buf_ptr, buf_end);
1906 if (start_code < 0) {
1909 dprintf("marker=%x avail_size_in_buf=%d\n", start_code, buf_end - buf_ptr);
1911 if ((buf_end - buf_ptr) > s->buffer_size)
1914 s->buffer_size = buf_end-buf_ptr;
1915 s->buffer = av_malloc(s->buffer_size + FF_INPUT_BUFFER_PADDING_SIZE);
1916 dprintf("buffer too small, expanding to %d bytes\n",
1920 /* unescape buffer of SOS, use special treatment for JPEG-LS */
1921 if (start_code == SOS && !s->ls)
1923 uint8_t *src = buf_ptr;
1924 uint8_t *dst = s->buffer;
1928 uint8_t x = *(src++);
1933 while(src<buf_end && x == 0xff)
1936 if (x >= 0xd0 && x <= 0xd7)
1942 init_get_bits(&s->gb, s->buffer, (dst - s->buffer)*8);
1944 dprintf("escaping removed %d bytes\n",
1945 (buf_end - buf_ptr) - (dst - s->buffer));
1947 else if(start_code == SOS && s->ls){
1948 uint8_t *src = buf_ptr;
1949 uint8_t *dst = s->buffer;
1957 while (src + t < buf_end){
1958 uint8_t x = src[t++];
1960 while((src + t < buf_end) && x == 0xff)
1970 init_put_bits(&pb, dst, t);
1972 /* unescape bitstream */
1974 uint8_t x = src[b++];
1975 put_bits(&pb, 8, x);
1978 put_bits(&pb, 7, x);
1982 flush_put_bits(&pb);
1984 init_get_bits(&s->gb, dst, bit_count);
1987 init_get_bits(&s->gb, buf_ptr, (buf_end - buf_ptr)*8);
1989 s->start_code = start_code;
1990 if(s->avctx->debug & FF_DEBUG_STARTCODE){
1991 av_log(s->avctx, AV_LOG_DEBUG, "startcode: %X\n", start_code);
1994 /* process markers */
1995 if (start_code >= 0xd0 && start_code <= 0xd7) {
1996 dprintf("restart marker: %d\n", start_code&0x0f);
1998 } else if (start_code >= APP0 && start_code <= APP15) {
1999 mjpeg_decode_app(s);
2001 } else if (start_code == COM){
2002 mjpeg_decode_com(s);
2005 switch(start_code) {
2007 s->restart_interval = 0;
2009 s->restart_count = 0;
2010 /* nothing to do on SOI */
2013 mjpeg_decode_dqt(s);
2016 if(mjpeg_decode_dht(s) < 0){
2017 av_log(s->avctx, AV_LOG_ERROR, "huffman table decode error\n");
2023 if (mjpeg_decode_sof(s) < 0)
2028 if (mjpeg_decode_sof(s) < 0)
2034 if (mjpeg_decode_sof(s) < 0)
2038 if (decode_lse(s) < 0)
2042 if ((s->buggy_avid && !s->interlaced) || s->restart_interval)
2046 if (s->interlaced) {
2047 s->bottom_field ^= 1;
2048 /* if not bottom field, do not output image yet */
2049 if (s->bottom_field)
2052 *picture = s->picture;
2053 *data_size = sizeof(AVFrame);
2056 picture->quality= FFMAX(FFMAX(s->qscale[0], s->qscale[1]), s->qscale[2]);
2057 picture->qstride= 0;
2058 picture->qscale_table= s->qscale_table;
2059 memset(picture->qscale_table, picture->quality, (s->width+15)/16);
2060 if(avctx->debug & FF_DEBUG_QP)
2061 av_log(s->avctx, AV_LOG_DEBUG, "QP: %d\n", picture->quality);
2062 picture->quality*= FF_QP2LAMBDA;
2069 mjpeg_decode_sos(s);
2070 /* buggy avid puts EOI every 10-20th frame */
2071 /* if restart period is over process EOI */
2072 if ((s->buggy_avid && !s->interlaced) || s->restart_interval)
2076 mjpeg_decode_dri(s);
2090 av_log(s->avctx, AV_LOG_ERROR, "mjpeg: unsupported coding type (%x)\n", start_code);
2093 // printf("mjpeg: unsupported marker (%x)\n", start_code);
2098 /* eof process start code */
2099 buf_ptr += (get_bits_count(&s->gb)+7)/8;
2100 dprintf("marker parser used %d bytes (%d bits)\n",
2101 (get_bits_count(&s->gb)+7)/8, get_bits_count(&s->gb));
2106 dprintf("mjpeg decode frame unused %d bytes\n", buf_end - buf_ptr);
2107 // return buf_end - buf_ptr;
2108 return buf_ptr - buf;
2111 static int mjpegb_decode_frame(AVCodecContext *avctx,
2112 void *data, int *data_size,
2113 uint8_t *buf, int buf_size)
2115 MJpegDecodeContext *s = avctx->priv_data;
2116 uint8_t *buf_end, *buf_ptr;
2117 AVFrame *picture = data;
2118 GetBitContext hgb; /* for the header */
2119 uint32_t dqt_offs, dht_offs, sof_offs, sos_offs, second_field_offs;
2120 uint32_t field_size, sod_offs;
2123 buf_end = buf + buf_size;
2126 /* reset on every SOI */
2127 s->restart_interval = 0;
2128 s->restart_count = 0;
2129 s->mjpb_skiptosod = 0;
2131 init_get_bits(&hgb, buf_ptr, /*buf_size*/(buf_end - buf_ptr)*8);
2133 skip_bits(&hgb, 32); /* reserved zeros */
2135 if (get_bits_long(&hgb, 32) != be2me_32(ff_get_fourcc("mjpg")))
2137 dprintf("not mjpeg-b (bad fourcc)\n");
2141 field_size = get_bits_long(&hgb, 32); /* field size */
2142 dprintf("field size: 0x%x\n", field_size);
2143 skip_bits(&hgb, 32); /* padded field size */
2144 second_field_offs = get_bits_long(&hgb, 32);
2145 dprintf("second field offs: 0x%x\n", second_field_offs);
2146 if (second_field_offs)
2149 dqt_offs = get_bits_long(&hgb, 32);
2150 dprintf("dqt offs: 0x%x\n", dqt_offs);
2153 init_get_bits(&s->gb, buf+dqt_offs, (buf_end - (buf+dqt_offs))*8);
2154 s->start_code = DQT;
2155 mjpeg_decode_dqt(s);
2158 dht_offs = get_bits_long(&hgb, 32);
2159 dprintf("dht offs: 0x%x\n", dht_offs);
2162 init_get_bits(&s->gb, buf+dht_offs, (buf_end - (buf+dht_offs))*8);
2163 s->start_code = DHT;
2164 mjpeg_decode_dht(s);
2167 sof_offs = get_bits_long(&hgb, 32);
2168 dprintf("sof offs: 0x%x\n", sof_offs);
2171 init_get_bits(&s->gb, buf+sof_offs, (buf_end - (buf+sof_offs))*8);
2172 s->start_code = SOF0;
2173 if (mjpeg_decode_sof(s) < 0)
2177 sos_offs = get_bits_long(&hgb, 32);
2178 dprintf("sos offs: 0x%x\n", sos_offs);
2179 sod_offs = get_bits_long(&hgb, 32);
2180 dprintf("sod offs: 0x%x\n", sod_offs);
2183 // init_get_bits(&s->gb, buf+sos_offs, (buf_end - (buf+sos_offs))*8);
2184 init_get_bits(&s->gb, buf+sos_offs, field_size*8);
2185 s->mjpb_skiptosod = (sod_offs - sos_offs - show_bits(&s->gb, 16));
2186 s->start_code = SOS;
2187 mjpeg_decode_sos(s);
2190 if (s->interlaced) {
2191 s->bottom_field ^= 1;
2192 /* if not bottom field, do not output image yet */
2193 if (s->bottom_field && second_field_offs)
2195 buf_ptr = buf + second_field_offs;
2196 second_field_offs = 0;
2201 //XXX FIXME factorize, this looks very similar to the EOI code
2203 *picture= s->picture;
2204 *data_size = sizeof(AVFrame);
2207 picture->quality= FFMAX(FFMAX(s->qscale[0], s->qscale[1]), s->qscale[2]);
2208 picture->qstride= 0;
2209 picture->qscale_table= s->qscale_table;
2210 memset(picture->qscale_table, picture->quality, (s->width+15)/16);
2211 if(avctx->debug & FF_DEBUG_QP)
2212 av_log(avctx, AV_LOG_DEBUG, "QP: %d\n", picture->quality);
2213 picture->quality*= FF_QP2LAMBDA;
2216 return buf_ptr - buf;
2221 static int sp5x_decode_frame(AVCodecContext *avctx,
2222 void *data, int *data_size,
2223 uint8_t *buf, int buf_size)
2226 MJpegDecodeContext *s = avctx->priv_data;
2228 const int qscale = 5;
2229 uint8_t *buf_ptr, *buf_end, *recoded;
2232 if (!avctx->width || !avctx->height)
2236 buf_end = buf + buf_size;
2239 recoded = av_mallocz(buf_size + 1024);
2244 recoded[j++] = 0xFF;
2245 recoded[j++] = 0xD8;
2247 memcpy(recoded+j, &sp5x_data_dqt[0], sizeof(sp5x_data_dqt));
2248 memcpy(recoded+j+5, &sp5x_quant_table[qscale * 2], 64);
2249 memcpy(recoded+j+70, &sp5x_quant_table[(qscale * 2) + 1], 64);
2250 j += sizeof(sp5x_data_dqt);
2252 memcpy(recoded+j, &sp5x_data_dht[0], sizeof(sp5x_data_dht));
2253 j += sizeof(sp5x_data_dht);
2255 memcpy(recoded+j, &sp5x_data_sof[0], sizeof(sp5x_data_sof));
2256 recoded[j+5] = (avctx->coded_height >> 8) & 0xFF;
2257 recoded[j+6] = avctx->coded_height & 0xFF;
2258 recoded[j+7] = (avctx->coded_width >> 8) & 0xFF;
2259 recoded[j+8] = avctx->coded_width & 0xFF;
2260 j += sizeof(sp5x_data_sof);
2262 memcpy(recoded+j, &sp5x_data_sos[0], sizeof(sp5x_data_sos));
2263 j += sizeof(sp5x_data_sos);
2265 for (i = 14; i < buf_size && j < buf_size+1024-2; i++)
2267 recoded[j++] = buf[i];
2273 recoded[j++] = 0xFF;
2274 recoded[j++] = 0xD9;
2276 i = mjpeg_decode_frame(avctx, data, data_size, recoded, j);
2283 s->width = avctx->coded_width;
2284 s->height = avctx->coded_height;
2285 s->nb_components = 3;
2286 s->component_id[0] = 0;
2289 s->quant_index[0] = 0;
2290 s->component_id[1] = 1;
2293 s->quant_index[1] = 1;
2294 s->component_id[2] = 2;
2297 s->quant_index[2] = 1;
2301 s->qscale_table = av_mallocz((s->width+15)/16);
2302 avctx->pix_fmt = s->cs_itu601 ? PIX_FMT_YUV420P : PIX_FMT_YUVJ420;
2305 s->picture.reference = 0;
2306 if (avctx->get_buffer(avctx, &s->picture) < 0)
2308 av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
2312 s->picture.pict_type = I_TYPE;
2313 s->picture.key_frame = 1;
2315 for (i = 0; i < 3; i++)
2316 s->linesize[i] = s->picture.linesize[i] << s->interlaced;
2319 for (i = 0; i < 64; i++)
2321 j = s->scantable.permutated[i];
2322 s->quant_matrixes[0][j] = sp5x_quant_table[(qscale * 2) + i];
2324 s->qscale[0] = FFMAX(
2325 s->quant_matrixes[0][s->scantable.permutated[1]],
2326 s->quant_matrixes[0][s->scantable.permutated[8]]) >> 1;
2328 for (i = 0; i < 64; i++)
2330 j = s->scantable.permutated[i];
2331 s->quant_matrixes[1][j] = sp5x_quant_table[(qscale * 2) + 1 + i];
2333 s->qscale[1] = FFMAX(
2334 s->quant_matrixes[1][s->scantable.permutated[1]],
2335 s->quant_matrixes[1][s->scantable.permutated[8]]) >> 1;
2340 s->comp_index[0] = 0;
2341 s->nb_blocks[0] = s->h_count[0] * s->v_count[0];
2342 s->h_scount[0] = s->h_count[0];
2343 s->v_scount[0] = s->v_count[0];
2347 s->comp_index[1] = 1;
2348 s->nb_blocks[1] = s->h_count[1] * s->v_count[1];
2349 s->h_scount[1] = s->h_count[1];
2350 s->v_scount[1] = s->v_count[1];
2354 s->comp_index[2] = 2;
2355 s->nb_blocks[2] = s->h_count[2] * s->v_count[2];
2356 s->h_scount[2] = s->h_count[2];
2357 s->v_scount[2] = s->v_count[2];
2361 for (i = 0; i < 3; i++)
2362 s->last_dc[i] = 1024;
2364 s->mb_width = (s->width * s->h_max * 8 -1) / (s->h_max * 8);
2365 s->mb_height = (s->height * s->v_max * 8 -1) / (s->v_max * 8);
2367 init_get_bits(&s->gb, buf+14, (buf_size-14)*8);
2369 return mjpeg_decode_scan(s);
2375 static int mjpeg_decode_end(AVCodecContext *avctx)
2377 MJpegDecodeContext *s = avctx->priv_data;
2381 av_free(s->qscale_table);
2385 free_vlc(&s->vlcs[i][j]);
2390 AVCodec mjpeg_decoder = {
2394 sizeof(MJpegDecodeContext),
2403 AVCodec mjpegb_decoder = {
2407 sizeof(MJpegDecodeContext),
2411 mjpegb_decode_frame,
2416 AVCodec sp5x_decoder = {
2420 sizeof(MJpegDecodeContext),
2429 #ifdef CONFIG_ENCODERS
2430 AVCodec ljpeg_encoder = { //FIXME avoid MPV_* lossless jpeg shouldnt need them
2434 sizeof(MpegEncContext),
2436 encode_picture_lossless,
2441 AVCodecParser mjpeg_parser = {
2443 sizeof(ParseContext),