ffmpeg / libavcodec / mjpeg.c @ 5509bffa
History | View | Annotate | Download (72.9 KB)
| 1 |
/*
|
|---|---|
| 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
|
| 6 |
*
|
| 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.
|
| 11 |
*
|
| 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.
|
| 16 |
*
|
| 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
|
| 20 |
*
|
| 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>
|
| 24 |
*/
|
| 25 |
|
| 26 |
/**
|
| 27 |
* @file mjpeg.c
|
| 28 |
* MJPEG encoder and decoder.
|
| 29 |
*/
|
| 30 |
|
| 31 |
//#define DEBUG
|
| 32 |
#include <assert.h> |
| 33 |
|
| 34 |
#include "avcodec.h" |
| 35 |
#include "dsputil.h" |
| 36 |
#include "mpegvideo.h" |
| 37 |
|
| 38 |
/* use two quantizer tables (one for luminance and one for chrominance) */
|
| 39 |
/* not yet working */
|
| 40 |
#undef TWOMATRIXES
|
| 41 |
|
| 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];
|
| 47 |
|
| 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];
|
| 52 |
} MJpegContext; |
| 53 |
|
| 54 |
/* JPEG marker codes */
|
| 55 |
typedef enum { |
| 56 |
/* start of frame */
|
| 57 |
SOF0 = 0xc0, /* baseline */ |
| 58 |
SOF1 = 0xc1, /* extended sequential, huffman */ |
| 59 |
SOF2 = 0xc2, /* progressive, huffman */ |
| 60 |
SOF3 = 0xc3, /* lossless, huffman */ |
| 61 |
|
| 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 */ |
| 69 |
|
| 70 |
SOF13 = 0xcd, /* differential sequential, arithmetic */ |
| 71 |
SOF14 = 0xce, /* differential progressive, arithmetic */ |
| 72 |
SOF15 = 0xcf, /* differential lossless, arithmetic */ |
| 73 |
|
| 74 |
DHT = 0xc4, /* define huffman tables */ |
| 75 |
|
| 76 |
DAC = 0xcc, /* define arithmetic-coding conditioning */ |
| 77 |
|
| 78 |
/* restart with modulo 8 count "m" */
|
| 79 |
RST0 = 0xd0,
|
| 80 |
RST1 = 0xd1,
|
| 81 |
RST2 = 0xd2,
|
| 82 |
RST3 = 0xd3,
|
| 83 |
RST4 = 0xd4,
|
| 84 |
RST5 = 0xd5,
|
| 85 |
RST6 = 0xd6,
|
| 86 |
RST7 = 0xd7,
|
| 87 |
|
| 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 */ |
| 96 |
|
| 97 |
APP0 = 0xe0,
|
| 98 |
APP1 = 0xe1,
|
| 99 |
APP2 = 0xe2,
|
| 100 |
APP3 = 0xe3,
|
| 101 |
APP4 = 0xe4,
|
| 102 |
APP5 = 0xe5,
|
| 103 |
APP6 = 0xe6,
|
| 104 |
APP7 = 0xe7,
|
| 105 |
APP8 = 0xe8,
|
| 106 |
APP9 = 0xe9,
|
| 107 |
APP10 = 0xea,
|
| 108 |
APP11 = 0xeb,
|
| 109 |
APP12 = 0xec,
|
| 110 |
APP13 = 0xed,
|
| 111 |
APP14 = 0xee,
|
| 112 |
APP15 = 0xef,
|
| 113 |
|
| 114 |
JPG0 = 0xf0,
|
| 115 |
JPG1 = 0xf1,
|
| 116 |
JPG2 = 0xf2,
|
| 117 |
JPG3 = 0xf3,
|
| 118 |
JPG4 = 0xf4,
|
| 119 |
JPG5 = 0xf5,
|
| 120 |
JPG6 = 0xf6,
|
| 121 |
SOF48 = 0xf7, ///< JPEG-LS |
| 122 |
LSE = 0xf8, ///< JPEG-LS extension parameters |
| 123 |
JPG9 = 0xf9,
|
| 124 |
JPG10 = 0xfa,
|
| 125 |
JPG11 = 0xfb,
|
| 126 |
JPG12 = 0xfc,
|
| 127 |
JPG13 = 0xfd,
|
| 128 |
|
| 129 |
COM = 0xfe, /* comment */ |
| 130 |
|
| 131 |
TEM = 0x01, /* temporary private use for arithmetic coding */ |
| 132 |
|
| 133 |
/* 0x02 -> 0xbf reserved */
|
| 134 |
} JPEG_MARKER; |
| 135 |
|
| 136 |
#if 0
|
| 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.
|
| 140 |
*/
|
| 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
|
| 150 |
};
|
| 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
|
| 160 |
};
|
| 161 |
#endif
|
| 162 |
|
| 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 };
|
| 169 |
|
| 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 };
|
| 174 |
|
| 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, |
| 198 |
0xf9, 0xfa |
| 199 |
}; |
| 200 |
|
| 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 };
|
| 203 |
|
| 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, |
| 225 |
0xf9, 0xfa |
| 226 |
}; |
| 227 |
|
| 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) |
| 231 |
{
|
| 232 |
int i, j, k,nb, code, sym;
|
| 233 |
|
| 234 |
code = 0;
|
| 235 |
k = 0;
|
| 236 |
for(i=1;i<=16;i++) { |
| 237 |
nb = bits_table[i]; |
| 238 |
for(j=0;j<nb;j++) { |
| 239 |
sym = val_table[k++]; |
| 240 |
huff_size[sym] = i; |
| 241 |
huff_code[sym] = code; |
| 242 |
code++; |
| 243 |
} |
| 244 |
code <<= 1;
|
| 245 |
} |
| 246 |
} |
| 247 |
|
| 248 |
#ifdef CONFIG_ENCODERS
|
| 249 |
int mjpeg_init(MpegEncContext *s)
|
| 250 |
{
|
| 251 |
MJpegContext *m; |
| 252 |
|
| 253 |
m = av_malloc(sizeof(MJpegContext));
|
| 254 |
if (!m)
|
| 255 |
return -1; |
| 256 |
|
| 257 |
s->min_qcoeff=-1023;
|
| 258 |
s->max_qcoeff= 1023;
|
| 259 |
|
| 260 |
/* build all the huffman tables */
|
| 261 |
build_huffman_codes(m->huff_size_dc_luminance, |
| 262 |
m->huff_code_dc_luminance, |
| 263 |
bits_dc_luminance, |
| 264 |
val_dc_luminance); |
| 265 |
build_huffman_codes(m->huff_size_dc_chrominance, |
| 266 |
m->huff_code_dc_chrominance, |
| 267 |
bits_dc_chrominance, |
| 268 |
val_dc_chrominance); |
| 269 |
build_huffman_codes(m->huff_size_ac_luminance, |
| 270 |
m->huff_code_ac_luminance, |
| 271 |
bits_ac_luminance, |
| 272 |
val_ac_luminance); |
| 273 |
build_huffman_codes(m->huff_size_ac_chrominance, |
| 274 |
m->huff_code_ac_chrominance, |
| 275 |
bits_ac_chrominance, |
| 276 |
val_ac_chrominance); |
| 277 |
|
| 278 |
s->mjpeg_ctx = m; |
| 279 |
return 0; |
| 280 |
} |
| 281 |
|
| 282 |
void mjpeg_close(MpegEncContext *s)
|
| 283 |
{
|
| 284 |
av_free(s->mjpeg_ctx); |
| 285 |
} |
| 286 |
#endif //CONFIG_ENCODERS |
| 287 |
|
| 288 |
#define PREDICT(ret, topleft, top, left, predictor)\
|
| 289 |
switch(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;\ |
| 296 |
default:\
|
| 297 |
case 7: ret= (left + top)>>1; break;\ |
| 298 |
} |
| 299 |
|
| 300 |
#ifdef CONFIG_ENCODERS
|
| 301 |
static inline void put_marker(PutBitContext *p, int code) |
| 302 |
{
|
| 303 |
put_bits(p, 8, 0xff); |
| 304 |
put_bits(p, 8, code);
|
| 305 |
} |
| 306 |
|
| 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) |
| 310 |
{
|
| 311 |
PutBitContext *p = &s->pb; |
| 312 |
int n, i;
|
| 313 |
|
| 314 |
put_bits(p, 4, table_class);
|
| 315 |
put_bits(p, 4, table_id);
|
| 316 |
|
| 317 |
n = 0;
|
| 318 |
for(i=1;i<=16;i++) { |
| 319 |
n += bits_table[i]; |
| 320 |
put_bits(p, 8, bits_table[i]);
|
| 321 |
} |
| 322 |
|
| 323 |
for(i=0;i<n;i++) |
| 324 |
put_bits(p, 8, value_table[i]);
|
| 325 |
|
| 326 |
return n + 17; |
| 327 |
} |
| 328 |
|
| 329 |
static void jpeg_table_header(MpegEncContext *s) |
| 330 |
{
|
| 331 |
PutBitContext *p = &s->pb; |
| 332 |
int i, j, size;
|
| 333 |
uint8_t *ptr; |
| 334 |
|
| 335 |
/* quant matrixes */
|
| 336 |
put_marker(p, DQT); |
| 337 |
#ifdef TWOMATRIXES
|
| 338 |
put_bits(p, 16, 2 + 2 * (1 + 64)); |
| 339 |
#else
|
| 340 |
put_bits(p, 16, 2 + 1 * (1 + 64)); |
| 341 |
#endif
|
| 342 |
put_bits(p, 4, 0); /* 8 bit precision */ |
| 343 |
put_bits(p, 4, 0); /* table 0 */ |
| 344 |
for(i=0;i<64;i++) { |
| 345 |
j = s->intra_scantable.permutated[i]; |
| 346 |
put_bits(p, 8, s->intra_matrix[j]);
|
| 347 |
} |
| 348 |
#ifdef TWOMATRIXES
|
| 349 |
put_bits(p, 4, 0); /* 8 bit precision */ |
| 350 |
put_bits(p, 4, 1); /* table 1 */ |
| 351 |
for(i=0;i<64;i++) { |
| 352 |
j = s->intra_scantable.permutated[i]; |
| 353 |
put_bits(p, 8, s->chroma_intra_matrix[j]);
|
| 354 |
} |
| 355 |
#endif
|
| 356 |
|
| 357 |
/* huffman table */
|
| 358 |
put_marker(p, DHT); |
| 359 |
flush_put_bits(p); |
| 360 |
ptr = pbBufPtr(p); |
| 361 |
put_bits(p, 16, 0); /* patched later */ |
| 362 |
size = 2;
|
| 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); |
| 365 |
|
| 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); |
| 368 |
ptr[0] = size >> 8; |
| 369 |
ptr[1] = size;
|
| 370 |
} |
| 371 |
|
| 372 |
static void jpeg_put_comments(MpegEncContext *s) |
| 373 |
{
|
| 374 |
PutBitContext *p = &s->pb; |
| 375 |
int size;
|
| 376 |
uint8_t *ptr; |
| 377 |
|
| 378 |
if (s->aspect_ratio_info /* && !lossless */) |
| 379 |
{
|
| 380 |
/* JFIF header */
|
| 381 |
put_marker(p, APP0); |
| 382 |
put_bits(p, 16, 16); |
| 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 */ |
| 390 |
} |
| 391 |
|
| 392 |
/* comment */
|
| 393 |
if(!(s->flags & CODEC_FLAG_BITEXACT)){
|
| 394 |
put_marker(p, COM); |
| 395 |
flush_put_bits(p); |
| 396 |
ptr = pbBufPtr(p); |
| 397 |
put_bits(p, 16, 0); /* patched later */ |
| 398 |
ff_put_string(p, LIBAVCODEC_IDENT, 1);
|
| 399 |
size = strlen(LIBAVCODEC_IDENT)+3;
|
| 400 |
ptr[0] = size >> 8; |
| 401 |
ptr[1] = size;
|
| 402 |
} |
| 403 |
|
| 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){
|
| 407 |
put_marker(p, COM); |
| 408 |
flush_put_bits(p); |
| 409 |
ptr = pbBufPtr(p); |
| 410 |
put_bits(p, 16, 0); /* patched later */ |
| 411 |
ff_put_string(p, "CS=ITU601", 1); |
| 412 |
size = strlen("CS=ITU601")+3; |
| 413 |
ptr[0] = size >> 8; |
| 414 |
ptr[1] = size;
|
| 415 |
} |
| 416 |
} |
| 417 |
|
| 418 |
void mjpeg_picture_header(MpegEncContext *s)
|
| 419 |
{
|
| 420 |
const int lossless= s->avctx->codec_id != CODEC_ID_MJPEG; |
| 421 |
const int ls = s->avctx->codec_id == CODEC_ID_JPEGLS; |
| 422 |
|
| 423 |
assert(!(ls && s->mjpeg_write_tables)); |
| 424 |
|
| 425 |
put_marker(&s->pb, SOI); |
| 426 |
|
| 427 |
if (!s->mjpeg_data_only_frames)
|
| 428 |
{
|
| 429 |
jpeg_put_comments(s); |
| 430 |
|
| 431 |
if (s->mjpeg_write_tables) jpeg_table_header(s);
|
| 432 |
|
| 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; |
| 437 |
default: assert(0); |
| 438 |
} |
| 439 |
|
| 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 */ |
| 443 |
else
|
| 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 */ |
| 448 |
|
| 449 |
/* Y component */
|
| 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 */ |
| 454 |
|
| 455 |
/* Cb component */
|
| 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 */ |
| 459 |
#ifdef TWOMATRIXES
|
| 460 |
put_bits(&s->pb, 8, lossless ? 0 : 1); /* select matrix */ |
| 461 |
#else
|
| 462 |
put_bits(&s->pb, 8, 0); /* select matrix */ |
| 463 |
#endif
|
| 464 |
|
| 465 |
/* Cr component */
|
| 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 */ |
| 469 |
#ifdef TWOMATRIXES
|
| 470 |
put_bits(&s->pb, 8, lossless ? 0 : 1); /* select matrix */ |
| 471 |
#else
|
| 472 |
put_bits(&s->pb, 8, 0); /* select matrix */ |
| 473 |
#endif
|
| 474 |
} |
| 475 |
|
| 476 |
/* scan header */
|
| 477 |
put_marker(&s->pb, SOS); |
| 478 |
put_bits(&s->pb, 16, 12); /* length */ |
| 479 |
put_bits(&s->pb, 8, 3); /* 3 components */ |
| 480 |
|
| 481 |
/* Y component */
|
| 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 */ |
| 485 |
|
| 486 |
/* Cb component */
|
| 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 */ |
| 490 |
|
| 491 |
/* Cr component */
|
| 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 */ |
| 495 |
|
| 496 |
put_bits(&s->pb, 8, (lossless && !ls) ? s->avctx->prediction_method+1 : 0); /* Ss (not used) */ |
| 497 |
|
| 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 */ |
| 502 |
default: assert(0); |
| 503 |
} |
| 504 |
|
| 505 |
put_bits(&s->pb, 8, 0); /* Ah/Al (not used) */ |
| 506 |
|
| 507 |
//FIXME DC/AC entropy table selectors stuff in jpegls
|
| 508 |
} |
| 509 |
|
| 510 |
static void escape_FF(MpegEncContext *s, int start) |
| 511 |
{
|
| 512 |
int size= put_bits_count(&s->pb) - start*8; |
| 513 |
int i, ff_count;
|
| 514 |
uint8_t *buf= s->pb.buf + start; |
| 515 |
int align= (-(size_t)(buf))&3; |
| 516 |
|
| 517 |
assert((size&7) == 0); |
| 518 |
size >>= 3;
|
| 519 |
|
| 520 |
ff_count=0;
|
| 521 |
for(i=0; i<size && i<align; i++){ |
| 522 |
if(buf[i]==0xFF) ff_count++; |
| 523 |
} |
| 524 |
for(; i<size-15; i+=16){ |
| 525 |
int acc, v;
|
| 526 |
|
| 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; |
| 535 |
|
| 536 |
acc>>=4;
|
| 537 |
acc+= (acc>>16);
|
| 538 |
acc+= (acc>>8);
|
| 539 |
ff_count+= acc&0xFF;
|
| 540 |
} |
| 541 |
for(; i<size; i++){
|
| 542 |
if(buf[i]==0xFF) ff_count++; |
| 543 |
} |
| 544 |
|
| 545 |
if(ff_count==0) return; |
| 546 |
|
| 547 |
/* skip put bits */
|
| 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); |
| 552 |
|
| 553 |
for(i=size-1; ff_count; i--){ |
| 554 |
int v= buf[i];
|
| 555 |
|
| 556 |
if(v==0xFF){ |
| 557 |
//printf("%d %d\n", i, ff_count);
|
| 558 |
buf[i+ff_count]= 0;
|
| 559 |
ff_count--; |
| 560 |
} |
| 561 |
|
| 562 |
buf[i+ff_count]= v; |
| 563 |
} |
| 564 |
} |
| 565 |
|
| 566 |
void ff_mjpeg_stuffing(PutBitContext * pbc)
|
| 567 |
{
|
| 568 |
int length;
|
| 569 |
length= (-put_bits_count(pbc))&7;
|
| 570 |
if(length) put_bits(pbc, length, (1<<length)-1); |
| 571 |
} |
| 572 |
|
| 573 |
void mjpeg_picture_trailer(MpegEncContext *s)
|
| 574 |
{
|
| 575 |
ff_mjpeg_stuffing(&s->pb); |
| 576 |
flush_put_bits(&s->pb); |
| 577 |
|
| 578 |
assert((s->header_bits&7)==0); |
| 579 |
|
| 580 |
escape_FF(s, s->header_bits>>3);
|
| 581 |
|
| 582 |
put_marker(&s->pb, EOI); |
| 583 |
} |
| 584 |
|
| 585 |
static inline void mjpeg_encode_dc(MpegEncContext *s, int val, |
| 586 |
uint8_t *huff_size, uint16_t *huff_code) |
| 587 |
{
|
| 588 |
int mant, nbits;
|
| 589 |
|
| 590 |
if (val == 0) { |
| 591 |
put_bits(&s->pb, huff_size[0], huff_code[0]); |
| 592 |
} else {
|
| 593 |
mant = val; |
| 594 |
if (val < 0) { |
| 595 |
val = -val; |
| 596 |
mant--; |
| 597 |
} |
| 598 |
|
| 599 |
nbits= av_log2_16bit(val) + 1;
|
| 600 |
|
| 601 |
put_bits(&s->pb, huff_size[nbits], huff_code[nbits]); |
| 602 |
|
| 603 |
put_bits(&s->pb, nbits, mant & ((1 << nbits) - 1)); |
| 604 |
} |
| 605 |
} |
| 606 |
|
| 607 |
static void encode_block(MpegEncContext *s, DCTELEM *block, int n) |
| 608 |
{
|
| 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; |
| 614 |
|
| 615 |
/* DC coef */
|
| 616 |
component = (n <= 3 ? 0 : n - 4 + 1); |
| 617 |
dc = block[0]; /* overflow is impossible */ |
| 618 |
val = dc - s->last_dc[component]; |
| 619 |
if (n < 4) { |
| 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; |
| 623 |
} else {
|
| 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; |
| 627 |
} |
| 628 |
s->last_dc[component] = dc; |
| 629 |
|
| 630 |
/* AC coefs */
|
| 631 |
|
| 632 |
run = 0;
|
| 633 |
last_index = s->block_last_index[n]; |
| 634 |
for(i=1;i<=last_index;i++) { |
| 635 |
j = s->intra_scantable.permutated[i]; |
| 636 |
val = block[j]; |
| 637 |
if (val == 0) { |
| 638 |
run++; |
| 639 |
} else {
|
| 640 |
while (run >= 16) { |
| 641 |
put_bits(&s->pb, huff_size_ac[0xf0], huff_code_ac[0xf0]); |
| 642 |
run -= 16;
|
| 643 |
} |
| 644 |
mant = val; |
| 645 |
if (val < 0) { |
| 646 |
val = -val; |
| 647 |
mant--; |
| 648 |
} |
| 649 |
|
| 650 |
nbits= av_log2(val) + 1;
|
| 651 |
code = (run << 4) | nbits;
|
| 652 |
|
| 653 |
put_bits(&s->pb, huff_size_ac[code], huff_code_ac[code]); |
| 654 |
|
| 655 |
put_bits(&s->pb, nbits, mant & ((1 << nbits) - 1)); |
| 656 |
run = 0;
|
| 657 |
} |
| 658 |
} |
| 659 |
|
| 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]); |
| 663 |
} |
| 664 |
|
| 665 |
void mjpeg_encode_mb(MpegEncContext *s,
|
| 666 |
DCTELEM block[6][64]) |
| 667 |
{
|
| 668 |
int i;
|
| 669 |
for(i=0;i<6;i++) { |
| 670 |
encode_block(s, block[i], i); |
| 671 |
} |
| 672 |
} |
| 673 |
|
| 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; |
| 682 |
|
| 683 |
init_put_bits(&s->pb, buf, buf_size); |
| 684 |
|
| 685 |
*p = *pict; |
| 686 |
p->pict_type= FF_I_TYPE; |
| 687 |
p->key_frame= 1;
|
| 688 |
|
| 689 |
mjpeg_picture_header(s); |
| 690 |
|
| 691 |
s->header_bits= put_bits_count(&s->pb); |
| 692 |
|
| 693 |
if(avctx->pix_fmt == PIX_FMT_RGBA32){
|
| 694 |
int x, y, i;
|
| 695 |
const int linesize= p->linesize[0]; |
| 696 |
uint16_t (*buffer)[4]= (void *) s->rd_scratchpad; |
| 697 |
int left[3], top[3], topleft[3]; |
| 698 |
|
| 699 |
for(i=0; i<3; i++){ |
| 700 |
buffer[0][i]= 1 << (9 - 1); |
| 701 |
} |
| 702 |
|
| 703 |
for(y = 0; y < height; y++) { |
| 704 |
const int modified_predictor= y ? predictor : 1; |
| 705 |
uint8_t *ptr = p->data[0] + (linesize * y);
|
| 706 |
|
| 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");
|
| 709 |
return -1; |
| 710 |
} |
| 711 |
|
| 712 |
for(i=0; i<3; i++){ |
| 713 |
top[i]= left[i]= topleft[i]= buffer[0][i];
|
| 714 |
} |
| 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; |
| 719 |
|
| 720 |
for(i=0;i<3;i++) { |
| 721 |
int pred, diff;
|
| 722 |
|
| 723 |
PREDICT(pred, topleft[i], top[i], left[i], modified_predictor); |
| 724 |
|
| 725 |
topleft[i]= top[i]; |
| 726 |
top[i]= buffer[x+1][i];
|
| 727 |
|
| 728 |
left[i]= buffer[x][i]; |
| 729 |
|
| 730 |
diff= ((left[i] - pred + 0x100)&0x1FF) - 0x100; |
| 731 |
|
| 732 |
if(i==0) |
| 733 |
mjpeg_encode_dc(s, diff, m->huff_size_dc_luminance, m->huff_code_dc_luminance); //FIXME ugly
|
| 734 |
else
|
| 735 |
mjpeg_encode_dc(s, diff, m->huff_size_dc_chrominance, m->huff_code_dc_chrominance); |
| 736 |
} |
| 737 |
} |
| 738 |
} |
| 739 |
}else{
|
| 740 |
int mb_x, mb_y, i;
|
| 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]; |
| 743 |
|
| 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");
|
| 747 |
return -1; |
| 748 |
} |
| 749 |
for(mb_x = 0; mb_x < mb_width; mb_x++) { |
| 750 |
if(mb_x==0 || mb_y==0){ |
| 751 |
for(i=0;i<3;i++) { |
| 752 |
uint8_t *ptr; |
| 753 |
int x, y, h, v, linesize;
|
| 754 |
h = s->mjpeg_hsample[i]; |
| 755 |
v = s->mjpeg_vsample[i]; |
| 756 |
linesize= p->linesize[i]; |
| 757 |
|
| 758 |
for(y=0; y<v; y++){ |
| 759 |
for(x=0; x<h; x++){ |
| 760 |
int pred;
|
| 761 |
|
| 762 |
ptr = p->data[i] + (linesize * (v * mb_y + y)) + (h * mb_x + x); //FIXME optimize this crap
|
| 763 |
if(y==0 && mb_y==0){ |
| 764 |
if(x==0 && mb_x==0){ |
| 765 |
pred= 128;
|
| 766 |
}else{
|
| 767 |
pred= ptr[-1];
|
| 768 |
} |
| 769 |
}else{
|
| 770 |
if(x==0 && mb_x==0){ |
| 771 |
pred= ptr[-linesize]; |
| 772 |
}else{
|
| 773 |
PREDICT(pred, ptr[-linesize-1], ptr[-linesize], ptr[-1], predictor); |
| 774 |
} |
| 775 |
} |
| 776 |
|
| 777 |
if(i==0) |
| 778 |
mjpeg_encode_dc(s, (int8_t)(*ptr - pred), m->huff_size_dc_luminance, m->huff_code_dc_luminance); //FIXME ugly
|
| 779 |
else
|
| 780 |
mjpeg_encode_dc(s, (int8_t)(*ptr - pred), m->huff_size_dc_chrominance, m->huff_code_dc_chrominance); |
| 781 |
} |
| 782 |
} |
| 783 |
} |
| 784 |
}else{
|
| 785 |
for(i=0;i<3;i++) { |
| 786 |
uint8_t *ptr; |
| 787 |
int x, y, h, v, linesize;
|
| 788 |
h = s->mjpeg_hsample[i]; |
| 789 |
v = s->mjpeg_vsample[i]; |
| 790 |
linesize= p->linesize[i]; |
| 791 |
|
| 792 |
for(y=0; y<v; y++){ |
| 793 |
for(x=0; x<h; x++){ |
| 794 |
int pred;
|
| 795 |
|
| 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); |
| 799 |
|
| 800 |
if(i==0) |
| 801 |
mjpeg_encode_dc(s, (int8_t)(*ptr - pred), m->huff_size_dc_luminance, m->huff_code_dc_luminance); //FIXME ugly
|
| 802 |
else
|
| 803 |
mjpeg_encode_dc(s, (int8_t)(*ptr - pred), m->huff_size_dc_chrominance, m->huff_code_dc_chrominance); |
| 804 |
} |
| 805 |
} |
| 806 |
} |
| 807 |
} |
| 808 |
} |
| 809 |
} |
| 810 |
} |
| 811 |
|
| 812 |
emms_c(); |
| 813 |
|
| 814 |
mjpeg_picture_trailer(s); |
| 815 |
s->picture_number++; |
| 816 |
|
| 817 |
flush_put_bits(&s->pb); |
| 818 |
return pbBufPtr(&s->pb) - s->pb.buf;
|
| 819 |
// return (put_bits_count(&f->pb)+7)/8;
|
| 820 |
} |
| 821 |
|
| 822 |
#endif //CONFIG_ENCODERS |
| 823 |
|
| 824 |
/******************************************/
|
| 825 |
/* decoding */
|
| 826 |
|
| 827 |
#define MAX_COMPONENTS 4 |
| 828 |
|
| 829 |
typedef struct MJpegDecodeContext { |
| 830 |
AVCodecContext *avctx; |
| 831 |
GetBitContext gb; |
| 832 |
int mpeg_enc_ctx_allocated; /* true if decoding context allocated */ |
| 833 |
|
| 834 |
int start_code; /* current start code */ |
| 835 |
int buffer_size;
|
| 836 |
uint8_t *buffer; |
| 837 |
|
| 838 |
int16_t quant_matrixes[4][64]; |
| 839 |
VLC vlcs[2][4]; |
| 840 |
int qscale[4]; ///< quantizer scale calculated from quant_matrixes |
| 841 |
|
| 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 */ |
| 846 |
int lossless;
|
| 847 |
int ls;
|
| 848 |
int rgb;
|
| 849 |
int rct; /* standard rct */ |
| 850 |
int pegasus_rct; /* pegasus reversible colorspace transform */ |
| 851 |
int bits; /* bits per component */ |
| 852 |
|
| 853 |
int maxval;
|
| 854 |
int near; ///< near lossless bound (si 0 for lossless) |
| 855 |
int t1,t2,t3;
|
| 856 |
int reset; ///< context halfing intervall ?rename |
| 857 |
|
| 858 |
int width, height;
|
| 859 |
int mb_width, mb_height;
|
| 860 |
int nb_components;
|
| 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 |
DCTELEM block[64] __align8;
|
| 877 |
ScanTable scantable; |
| 878 |
void (*idct_put)(uint8_t *dest/*align 8*/, int line_size, DCTELEM *block/*align 16*/); |
| 879 |
|
| 880 |
int restart_interval;
|
| 881 |
int restart_count;
|
| 882 |
|
| 883 |
int buggy_avid;
|
| 884 |
int cs_itu601;
|
| 885 |
int interlace_polarity;
|
| 886 |
|
| 887 |
int mjpb_skiptosod;
|
| 888 |
} MJpegDecodeContext; |
| 889 |
|
| 890 |
#include "jpeg_ls.c" //FIXME make jpeg-ls more independant |
| 891 |
|
| 892 |
static int mjpeg_decode_dht(MJpegDecodeContext *s); |
| 893 |
|
| 894 |
static int build_vlc(VLC *vlc, const uint8_t *bits_table, const uint8_t *val_table, |
| 895 |
int nb_codes, int use_static) |
| 896 |
{
|
| 897 |
uint8_t huff_size[256];
|
| 898 |
uint16_t huff_code[256];
|
| 899 |
|
| 900 |
memset(huff_size, 0, sizeof(huff_size)); |
| 901 |
build_huffman_codes(huff_size, huff_code, bits_table, val_table); |
| 902 |
|
| 903 |
return init_vlc(vlc, 9, nb_codes, huff_size, 1, 1, huff_code, 2, 2, use_static); |
| 904 |
} |
| 905 |
|
| 906 |
static int mjpeg_decode_init(AVCodecContext *avctx) |
| 907 |
{
|
| 908 |
MJpegDecodeContext *s = avctx->priv_data; |
| 909 |
MpegEncContext s2; |
| 910 |
memset(s, 0, sizeof(MJpegDecodeContext)); |
| 911 |
|
| 912 |
s->avctx = avctx; |
| 913 |
|
| 914 |
/* ugly way to get the idct & scantable FIXME */
|
| 915 |
memset(&s2, 0, sizeof(MpegEncContext)); |
| 916 |
s2.avctx= avctx; |
| 917 |
// s2->out_format = FMT_MJPEG;
|
| 918 |
dsputil_init(&s2.dsp, avctx); |
| 919 |
DCT_common_init(&s2); |
| 920 |
|
| 921 |
s->scantable= s2.intra_scantable; |
| 922 |
s->idct_put= s2.dsp.idct_put; |
| 923 |
|
| 924 |
s->mpeg_enc_ctx_allocated = 0;
|
| 925 |
s->buffer_size = 0;
|
| 926 |
s->buffer = NULL;
|
| 927 |
s->start_code = -1;
|
| 928 |
s->first_picture = 1;
|
| 929 |
s->org_height = avctx->coded_height; |
| 930 |
|
| 931 |
build_vlc(&s->vlcs[0][0], bits_dc_luminance, val_dc_luminance, 12, 0); |
| 932 |
build_vlc(&s->vlcs[0][1], bits_dc_chrominance, val_dc_chrominance, 12, 0); |
| 933 |
build_vlc(&s->vlcs[1][0], bits_ac_luminance, val_ac_luminance, 251, 0); |
| 934 |
build_vlc(&s->vlcs[1][1], bits_ac_chrominance, val_ac_chrominance, 251, 0); |
| 935 |
|
| 936 |
if (avctx->flags & CODEC_FLAG_EXTERN_HUFF)
|
| 937 |
{
|
| 938 |
av_log(avctx, AV_LOG_INFO, "mjpeg: using external huffman table\n");
|
| 939 |
init_get_bits(&s->gb, avctx->extradata, avctx->extradata_size*8);
|
| 940 |
mjpeg_decode_dht(s); |
| 941 |
/* should check for error - but dunno */
|
| 942 |
} |
| 943 |
|
| 944 |
return 0; |
| 945 |
} |
| 946 |
|
| 947 |
|
| 948 |
/**
|
| 949 |
* finds the end of the current frame in the bitstream.
|
| 950 |
* @return the position of the first byte of the next frame, or -1
|
| 951 |
*/
|
| 952 |
static int find_frame_end(ParseContext *pc, const uint8_t *buf, int buf_size){ |
| 953 |
int vop_found, i;
|
| 954 |
uint16_t state; |
| 955 |
|
| 956 |
vop_found= pc->frame_start_found; |
| 957 |
state= pc->state; |
| 958 |
|
| 959 |
i=0;
|
| 960 |
if(!vop_found){
|
| 961 |
for(i=0; i<buf_size; i++){ |
| 962 |
state= (state<<8) | buf[i];
|
| 963 |
if(state == 0xFFD8){ |
| 964 |
i++; |
| 965 |
vop_found=1;
|
| 966 |
break;
|
| 967 |
} |
| 968 |
} |
| 969 |
} |
| 970 |
|
| 971 |
if(vop_found){
|
| 972 |
/* EOF considered as end of frame */
|
| 973 |
if (buf_size == 0) |
| 974 |
return 0; |
| 975 |
for(; i<buf_size; i++){
|
| 976 |
state= (state<<8) | buf[i];
|
| 977 |
if(state == 0xFFD8){ |
| 978 |
pc->frame_start_found=0;
|
| 979 |
pc->state=0;
|
| 980 |
return i-1; |
| 981 |
} |
| 982 |
} |
| 983 |
} |
| 984 |
pc->frame_start_found= vop_found; |
| 985 |
pc->state= state; |
| 986 |
return END_NOT_FOUND;
|
| 987 |
} |
| 988 |
|
| 989 |
static int jpeg_parse(AVCodecParserContext *s, |
| 990 |
AVCodecContext *avctx, |
| 991 |
uint8_t **poutbuf, int *poutbuf_size,
|
| 992 |
const uint8_t *buf, int buf_size) |
| 993 |
{
|
| 994 |
ParseContext *pc = s->priv_data; |
| 995 |
int next;
|
| 996 |
|
| 997 |
next= find_frame_end(pc, buf, buf_size); |
| 998 |
|
| 999 |
if (ff_combine_frame(pc, next, (uint8_t **)&buf, &buf_size) < 0) { |
| 1000 |
*poutbuf = NULL;
|
| 1001 |
*poutbuf_size = 0;
|
| 1002 |
return buf_size;
|
| 1003 |
} |
| 1004 |
|
| 1005 |
*poutbuf = (uint8_t *)buf; |
| 1006 |
*poutbuf_size = buf_size; |
| 1007 |
return next;
|
| 1008 |
} |
| 1009 |
|
| 1010 |
/* quantize tables */
|
| 1011 |
static int mjpeg_decode_dqt(MJpegDecodeContext *s) |
| 1012 |
{
|
| 1013 |
int len, index, i, j;
|
| 1014 |
|
| 1015 |
len = get_bits(&s->gb, 16) - 2; |
| 1016 |
|
| 1017 |
while (len >= 65) { |
| 1018 |
/* only 8 bit precision handled */
|
| 1019 |
if (get_bits(&s->gb, 4) != 0) |
| 1020 |
{
|
| 1021 |
dprintf("dqt: 16bit precision\n");
|
| 1022 |
return -1; |
| 1023 |
} |
| 1024 |
index = get_bits(&s->gb, 4);
|
| 1025 |
if (index >= 4) |
| 1026 |
return -1; |
| 1027 |
dprintf("index=%d\n", index);
|
| 1028 |
/* read quant table */
|
| 1029 |
for(i=0;i<64;i++) { |
| 1030 |
j = s->scantable.permutated[i]; |
| 1031 |
s->quant_matrixes[index][j] = get_bits(&s->gb, 8);
|
| 1032 |
} |
| 1033 |
|
| 1034 |
//XXX FIXME finetune, and perhaps add dc too
|
| 1035 |
s->qscale[index]= FFMAX( |
| 1036 |
s->quant_matrixes[index][s->scantable.permutated[1]],
|
| 1037 |
s->quant_matrixes[index][s->scantable.permutated[8]]) >> 1; |
| 1038 |
dprintf("qscale[%d]: %d\n", index, s->qscale[index]);
|
| 1039 |
len -= 65;
|
| 1040 |
} |
| 1041 |
|
| 1042 |
return 0; |
| 1043 |
} |
| 1044 |
|
| 1045 |
/* decode huffman tables and build VLC decoders */
|
| 1046 |
static int mjpeg_decode_dht(MJpegDecodeContext *s) |
| 1047 |
{
|
| 1048 |
int len, index, i, class, n, v, code_max;
|
| 1049 |
uint8_t bits_table[17];
|
| 1050 |
uint8_t val_table[256];
|
| 1051 |
|
| 1052 |
len = get_bits(&s->gb, 16) - 2; |
| 1053 |
|
| 1054 |
while (len > 0) { |
| 1055 |
if (len < 17) |
| 1056 |
return -1; |
| 1057 |
class = get_bits(&s->gb, 4);
|
| 1058 |
if (class >= 2) |
| 1059 |
return -1; |
| 1060 |
index = get_bits(&s->gb, 4);
|
| 1061 |
if (index >= 4) |
| 1062 |
return -1; |
| 1063 |
n = 0;
|
| 1064 |
for(i=1;i<=16;i++) { |
| 1065 |
bits_table[i] = get_bits(&s->gb, 8);
|
| 1066 |
n += bits_table[i]; |
| 1067 |
} |
| 1068 |
len -= 17;
|
| 1069 |
if (len < n || n > 256) |
| 1070 |
return -1; |
| 1071 |
|
| 1072 |
code_max = 0;
|
| 1073 |
for(i=0;i<n;i++) { |
| 1074 |
v = get_bits(&s->gb, 8);
|
| 1075 |
if (v > code_max)
|
| 1076 |
code_max = v; |
| 1077 |
val_table[i] = v; |
| 1078 |
} |
| 1079 |
len -= n; |
| 1080 |
|
| 1081 |
/* build VLC and flush previous vlc if present */
|
| 1082 |
free_vlc(&s->vlcs[class][index]); |
| 1083 |
dprintf("class=%d index=%d nb_codes=%d\n",
|
| 1084 |
class, index, code_max + 1);
|
| 1085 |
if(build_vlc(&s->vlcs[class][index], bits_table, val_table, code_max + 1, 0) < 0){ |
| 1086 |
return -1; |
| 1087 |
} |
| 1088 |
} |
| 1089 |
return 0; |
| 1090 |
} |
| 1091 |
|
| 1092 |
static int mjpeg_decode_sof(MJpegDecodeContext *s) |
| 1093 |
{
|
| 1094 |
int len, nb_components, i, width, height;
|
| 1095 |
|
| 1096 |
/* XXX: verify len field validity */
|
| 1097 |
len = get_bits(&s->gb, 16);
|
| 1098 |
s->bits= get_bits(&s->gb, 8);
|
| 1099 |
|
| 1100 |
if(s->pegasus_rct) s->bits=9; |
| 1101 |
if(s->bits==9 && !s->pegasus_rct) s->rct=1; //FIXME ugly |
| 1102 |
|
| 1103 |
if (s->bits != 8 && !s->lossless){ |
| 1104 |
av_log(s->avctx, AV_LOG_ERROR, "only 8 bits/component accepted\n");
|
| 1105 |
return -1; |
| 1106 |
} |
| 1107 |
height = get_bits(&s->gb, 16);
|
| 1108 |
width = get_bits(&s->gb, 16);
|
| 1109 |
|
| 1110 |
dprintf("sof0: picture: %dx%d\n", width, height);
|
| 1111 |
if(avcodec_check_dimensions(s->avctx, width, height))
|
| 1112 |
return -1; |
| 1113 |
|
| 1114 |
nb_components = get_bits(&s->gb, 8);
|
| 1115 |
if (nb_components <= 0 || |
| 1116 |
nb_components > MAX_COMPONENTS) |
| 1117 |
return -1; |
| 1118 |
s->nb_components = nb_components; |
| 1119 |
s->h_max = 1;
|
| 1120 |
s->v_max = 1;
|
| 1121 |
for(i=0;i<nb_components;i++) { |
| 1122 |
/* component id */
|
| 1123 |
s->component_id[i] = get_bits(&s->gb, 8) - 1; |
| 1124 |
s->h_count[i] = get_bits(&s->gb, 4);
|
| 1125 |
s->v_count[i] = get_bits(&s->gb, 4);
|
| 1126 |
/* compute hmax and vmax (only used in interleaved case) */
|
| 1127 |
if (s->h_count[i] > s->h_max)
|
| 1128 |
s->h_max = s->h_count[i]; |
| 1129 |
if (s->v_count[i] > s->v_max)
|
| 1130 |
s->v_max = s->v_count[i]; |
| 1131 |
s->quant_index[i] = get_bits(&s->gb, 8);
|
| 1132 |
if (s->quant_index[i] >= 4) |
| 1133 |
return -1; |
| 1134 |
dprintf("component %d %d:%d id: %d quant:%d\n", i, s->h_count[i],
|
| 1135 |
s->v_count[i], s->component_id[i], s->quant_index[i]); |
| 1136 |
} |
| 1137 |
|
| 1138 |
if(s->v_max==1 && s->h_max==1 && s->lossless==1) s->rgb=1; |
| 1139 |
|
| 1140 |
/* if different size, realloc/alloc picture */
|
| 1141 |
/* XXX: also check h_count and v_count */
|
| 1142 |
if (width != s->width || height != s->height) {
|
| 1143 |
av_freep(&s->qscale_table); |
| 1144 |
|
| 1145 |
s->width = width; |
| 1146 |
s->height = height; |
| 1147 |
avcodec_set_dimensions(s->avctx, width, height); |
| 1148 |
|
| 1149 |
/* test interlaced mode */
|
| 1150 |
if (s->first_picture &&
|
| 1151 |
s->org_height != 0 &&
|
| 1152 |
s->height < ((s->org_height * 3) / 4)) { |
| 1153 |
s->interlaced = 1;
|
| 1154 |
// s->bottom_field = (s->interlace_polarity) ? 1 : 0;
|
| 1155 |
s->bottom_field = 0;
|
| 1156 |
s->avctx->height *= 2;
|
| 1157 |
} |
| 1158 |
|
| 1159 |
s->qscale_table= av_mallocz((s->width+15)/16); |
| 1160 |
|
| 1161 |
s->first_picture = 0;
|
| 1162 |
} |
| 1163 |
|
| 1164 |
if(s->interlaced && s->bottom_field)
|
| 1165 |
return 0; |
| 1166 |
|
| 1167 |
/* XXX: not complete test ! */
|
| 1168 |
switch((s->h_count[0] << 4) | s->v_count[0]) { |
| 1169 |
case 0x11: |
| 1170 |
if(s->rgb){
|
| 1171 |
s->avctx->pix_fmt = PIX_FMT_RGBA32; |
| 1172 |
}else if(s->nb_components==3) |
| 1173 |
s->avctx->pix_fmt = s->cs_itu601 ? PIX_FMT_YUV444P : PIX_FMT_YUVJ444P; |
| 1174 |
else
|
| 1175 |
s->avctx->pix_fmt = PIX_FMT_GRAY8; |
| 1176 |
break;
|
| 1177 |
case 0x21: |
| 1178 |
s->avctx->pix_fmt = s->cs_itu601 ? PIX_FMT_YUV422P : PIX_FMT_YUVJ422P; |
| 1179 |
break;
|
| 1180 |
default:
|
| 1181 |
case 0x22: |
| 1182 |
s->avctx->pix_fmt = s->cs_itu601 ? PIX_FMT_YUV420P : PIX_FMT_YUVJ420P; |
| 1183 |
break;
|
| 1184 |
} |
| 1185 |
|
| 1186 |
if(s->picture.data[0]) |
| 1187 |
s->avctx->release_buffer(s->avctx, &s->picture); |
| 1188 |
|
| 1189 |
s->picture.reference= 0;
|
| 1190 |
if(s->avctx->get_buffer(s->avctx, &s->picture) < 0){ |
| 1191 |
av_log(s->avctx, AV_LOG_ERROR, "get_buffer() failed\n");
|
| 1192 |
return -1; |
| 1193 |
} |
| 1194 |
s->picture.pict_type= I_TYPE; |
| 1195 |
s->picture.key_frame= 1;
|
| 1196 |
|
| 1197 |
for(i=0; i<3; i++){ |
| 1198 |
s->linesize[i]= s->picture.linesize[i] << s->interlaced; |
| 1199 |
} |
| 1200 |
|
| 1201 |
// printf("%d %d %d %d %d %d\n", s->width, s->height, s->linesize[0], s->linesize[1], s->interlaced, s->avctx->height);
|
| 1202 |
|
| 1203 |
if (len != (8+(3*nb_components))) |
| 1204 |
{
|
| 1205 |
dprintf("decode_sof0: error, len(%d) mismatch\n", len);
|
| 1206 |
} |
| 1207 |
|
| 1208 |
return 0; |
| 1209 |
} |
| 1210 |
|
| 1211 |
static inline int mjpeg_decode_dc(MJpegDecodeContext *s, int dc_index) |
| 1212 |
{
|
| 1213 |
int code;
|
| 1214 |
code = get_vlc2(&s->gb, s->vlcs[0][dc_index].table, 9, 2); |
| 1215 |
if (code < 0) |
| 1216 |
{
|
| 1217 |
dprintf("mjpeg_decode_dc: bad vlc: %d:%d (%p)\n", 0, dc_index, |
| 1218 |
&s->vlcs[0][dc_index]);
|
| 1219 |
return 0xffff; |
| 1220 |
} |
| 1221 |
|
| 1222 |
if(code)
|
| 1223 |
return get_xbits(&s->gb, code);
|
| 1224 |
else
|
| 1225 |
return 0; |
| 1226 |
} |
| 1227 |
|
| 1228 |
/* decode block and dequantize */
|
| 1229 |
static int decode_block(MJpegDecodeContext *s, DCTELEM *block, |
| 1230 |
int component, int dc_index, int ac_index, int quant_index) |
| 1231 |
{
|
| 1232 |
int code, i, j, level, val;
|
| 1233 |
VLC *ac_vlc; |
| 1234 |
int16_t *quant_matrix; |
| 1235 |
|
| 1236 |
/* DC coef */
|
| 1237 |
val = mjpeg_decode_dc(s, dc_index); |
| 1238 |
if (val == 0xffff) { |
| 1239 |
dprintf("error dc\n");
|
| 1240 |
return -1; |
| 1241 |
} |
| 1242 |
quant_matrix = s->quant_matrixes[quant_index]; |
| 1243 |
val = val * quant_matrix[0] + s->last_dc[component];
|
| 1244 |
s->last_dc[component] = val; |
| 1245 |
block[0] = val;
|
| 1246 |
/* AC coefs */
|
| 1247 |
ac_vlc = &s->vlcs[1][ac_index];
|
| 1248 |
i = 1;
|
| 1249 |
for(;;) {
|
| 1250 |
code = get_vlc2(&s->gb, s->vlcs[1][ac_index].table, 9, 2); |
| 1251 |
|
| 1252 |
if (code < 0) { |
| 1253 |
dprintf("error ac\n");
|
| 1254 |
return -1; |
| 1255 |
} |
| 1256 |
/* EOB */
|
| 1257 |
if (code == 0) |
| 1258 |
break;
|
| 1259 |
if (code == 0xf0) { |
| 1260 |
i += 16;
|
| 1261 |
} else {
|
| 1262 |
level = get_xbits(&s->gb, code & 0xf);
|
| 1263 |
i += code >> 4;
|
| 1264 |
if (i >= 64) { |
| 1265 |
dprintf("error count: %d\n", i);
|
| 1266 |
return -1; |
| 1267 |
} |
| 1268 |
j = s->scantable.permutated[i]; |
| 1269 |
block[j] = level * quant_matrix[j]; |
| 1270 |
i++; |
| 1271 |
if (i >= 64) |
| 1272 |
break;
|
| 1273 |
} |
| 1274 |
} |
| 1275 |
return 0; |
| 1276 |
} |
| 1277 |
|
| 1278 |
static int ljpeg_decode_rgb_scan(MJpegDecodeContext *s, int predictor, int point_transform){ |
| 1279 |
int i, mb_x, mb_y;
|
| 1280 |
uint16_t buffer[32768][4]; |
| 1281 |
int left[3], top[3], topleft[3]; |
| 1282 |
const int linesize= s->linesize[0]; |
| 1283 |
const int mask= (1<<s->bits)-1; |
| 1284 |
|
| 1285 |
if((unsigned)s->mb_width > 32768) //dynamic alloc |
| 1286 |
return -1; |
| 1287 |
|
| 1288 |
for(i=0; i<3; i++){ |
| 1289 |
buffer[0][i]= 1 << (s->bits + point_transform - 1); |
| 1290 |
} |
| 1291 |
for(mb_y = 0; mb_y < s->mb_height; mb_y++) { |
| 1292 |
const int modified_predictor= mb_y ? predictor : 1; |
| 1293 |
uint8_t *ptr = s->picture.data[0] + (linesize * mb_y);
|
| 1294 |
|
| 1295 |
if (s->interlaced && s->bottom_field)
|
| 1296 |
ptr += linesize >> 1;
|
| 1297 |
|
| 1298 |
for(i=0; i<3; i++){ |
| 1299 |
top[i]= left[i]= topleft[i]= buffer[0][i];
|
| 1300 |
} |
| 1301 |
for(mb_x = 0; mb_x < s->mb_width; mb_x++) { |
| 1302 |
if (s->restart_interval && !s->restart_count)
|
| 1303 |
s->restart_count = s->restart_interval; |
| 1304 |
|
| 1305 |
for(i=0;i<3;i++) { |
| 1306 |
int pred;
|
| 1307 |
|
| 1308 |
topleft[i]= top[i]; |
| 1309 |
top[i]= buffer[mb_x][i]; |
| 1310 |
|
| 1311 |
PREDICT(pred, topleft[i], top[i], left[i], modified_predictor); |
| 1312 |
|
| 1313 |
left[i]= |
| 1314 |
buffer[mb_x][i]= mask & (pred + (mjpeg_decode_dc(s, s->dc_index[i]) << point_transform)); |
| 1315 |
} |
| 1316 |
|
| 1317 |
if (s->restart_interval && !--s->restart_count) {
|
| 1318 |
align_get_bits(&s->gb); |
| 1319 |
skip_bits(&s->gb, 16); /* skip RSTn */ |
| 1320 |
} |
| 1321 |
} |
| 1322 |
|
| 1323 |
if(s->rct){
|
| 1324 |
for(mb_x = 0; mb_x < s->mb_width; mb_x++) { |
| 1325 |
ptr[4*mb_x+1] = buffer[mb_x][0] - ((buffer[mb_x][1] + buffer[mb_x][2] - 0x200)>>2); |
| 1326 |
ptr[4*mb_x+0] = buffer[mb_x][1] + ptr[4*mb_x+1]; |
| 1327 |
ptr[4*mb_x+2] = buffer[mb_x][2] + ptr[4*mb_x+1]; |
| 1328 |
} |
| 1329 |
}else if(s->pegasus_rct){ |
| 1330 |
for(mb_x = 0; mb_x < s->mb_width; mb_x++) { |
| 1331 |
ptr[4*mb_x+1] = buffer[mb_x][0] - ((buffer[mb_x][1] + buffer[mb_x][2])>>2); |
| 1332 |
ptr[4*mb_x+0] = buffer[mb_x][1] + ptr[4*mb_x+1]; |
| 1333 |
ptr[4*mb_x+2] = buffer[mb_x][2] + ptr[4*mb_x+1]; |
| 1334 |
} |
| 1335 |
}else{
|
| 1336 |
for(mb_x = 0; mb_x < s->mb_width; mb_x++) { |
| 1337 |
ptr[4*mb_x+0] = buffer[mb_x][0]; |
| 1338 |
ptr[4*mb_x+1] = buffer[mb_x][1]; |
| 1339 |
ptr[4*mb_x+2] = buffer[mb_x][2]; |
| 1340 |
} |
| 1341 |
} |
| 1342 |
} |
| 1343 |
return 0; |
| 1344 |
} |
| 1345 |
|
| 1346 |
static int ljpeg_decode_yuv_scan(MJpegDecodeContext *s, int predictor, int point_transform){ |
| 1347 |
int i, mb_x, mb_y;
|
| 1348 |
const int nb_components=3; |
| 1349 |
|
| 1350 |
for(mb_y = 0; mb_y < s->mb_height; mb_y++) { |
| 1351 |
for(mb_x = 0; mb_x < s->mb_width; mb_x++) { |
| 1352 |
if (s->restart_interval && !s->restart_count)
|
| 1353 |
s->restart_count = s->restart_interval; |
| 1354 |
|
| 1355 |
if(mb_x==0 || mb_y==0 || s->interlaced){ |
| 1356 |
for(i=0;i<nb_components;i++) { |
| 1357 |
uint8_t *ptr; |
| 1358 |
int n, h, v, x, y, c, j, linesize;
|
| 1359 |
n = s->nb_blocks[i]; |
| 1360 |
c = s->comp_index[i]; |
| 1361 |
h = s->h_scount[i]; |
| 1362 |
v = s->v_scount[i]; |
| 1363 |
x = 0;
|
| 1364 |
y = 0;
|
| 1365 |
linesize= s->linesize[c]; |
| 1366 |
|
| 1367 |
for(j=0; j<n; j++) { |
| 1368 |
int pred;
|
| 1369 |
|
| 1370 |
ptr = s->picture.data[c] + (linesize * (v * mb_y + y)) + (h * mb_x + x); //FIXME optimize this crap
|
| 1371 |
if(y==0 && mb_y==0){ |
| 1372 |
if(x==0 && mb_x==0){ |
| 1373 |
pred= 128 << point_transform;
|
| 1374 |
}else{
|
| 1375 |
pred= ptr[-1];
|
| 1376 |
} |
| 1377 |
}else{
|
| 1378 |
if(x==0 && mb_x==0){ |
| 1379 |
pred= ptr[-linesize]; |
| 1380 |
}else{
|
| 1381 |
PREDICT(pred, ptr[-linesize-1], ptr[-linesize], ptr[-1], predictor); |
| 1382 |
} |
| 1383 |
} |
| 1384 |
|
| 1385 |
if (s->interlaced && s->bottom_field)
|
| 1386 |
ptr += linesize >> 1;
|
| 1387 |
*ptr= pred + (mjpeg_decode_dc(s, s->dc_index[i]) << point_transform); |
| 1388 |
|
| 1389 |
if (++x == h) {
|
| 1390 |
x = 0;
|
| 1391 |
y++; |
| 1392 |
} |
| 1393 |
} |
| 1394 |
} |
| 1395 |
}else{
|
| 1396 |
for(i=0;i<nb_components;i++) { |
| 1397 |
uint8_t *ptr; |
| 1398 |
int n, h, v, x, y, c, j, linesize;
|
| 1399 |
n = s->nb_blocks[i]; |
| 1400 |
c = s->comp_index[i]; |
| 1401 |
h = s->h_scount[i]; |
| 1402 |
v = s->v_scount[i]; |
| 1403 |
x = 0;
|
| 1404 |
y = 0;
|
| 1405 |
linesize= s->linesize[c]; |
| 1406 |
|
| 1407 |
for(j=0; j<n; j++) { |
| 1408 |
int pred;
|
| 1409 |
|
| 1410 |
ptr = s->picture.data[c] + (linesize * (v * mb_y + y)) + (h * mb_x + x); //FIXME optimize this crap
|
| 1411 |
PREDICT(pred, ptr[-linesize-1], ptr[-linesize], ptr[-1], predictor); |
| 1412 |
*ptr= pred + (mjpeg_decode_dc(s, s->dc_index[i]) << point_transform); |
| 1413 |
if (++x == h) {
|
| 1414 |
x = 0;
|
| 1415 |
y++; |
| 1416 |
} |
| 1417 |
} |
| 1418 |
} |
| 1419 |
} |
| 1420 |
if (s->restart_interval && !--s->restart_count) {
|
| 1421 |
align_get_bits(&s->gb); |
| 1422 |
skip_bits(&s->gb, 16); /* skip RSTn */ |
| 1423 |
} |
| 1424 |
} |
| 1425 |
} |
| 1426 |
return 0; |
| 1427 |
} |
| 1428 |
|
| 1429 |
static int mjpeg_decode_scan(MJpegDecodeContext *s){ |
| 1430 |
int i, mb_x, mb_y;
|
| 1431 |
const int nb_components=3; |
| 1432 |
|
| 1433 |
for(mb_y = 0; mb_y < s->mb_height; mb_y++) { |
| 1434 |
for(mb_x = 0; mb_x < s->mb_width; mb_x++) { |
| 1435 |
if (s->restart_interval && !s->restart_count)
|
| 1436 |
s->restart_count = s->restart_interval; |
| 1437 |
|
| 1438 |
for(i=0;i<nb_components;i++) { |
| 1439 |
uint8_t *ptr; |
| 1440 |
int n, h, v, x, y, c, j;
|
| 1441 |
n = s->nb_blocks[i]; |
| 1442 |
c = s->comp_index[i]; |
| 1443 |
h = s->h_scount[i]; |
| 1444 |
v = s->v_scount[i]; |
| 1445 |
x = 0;
|
| 1446 |
y = 0;
|
| 1447 |
for(j=0;j<n;j++) { |
| 1448 |
memset(s->block, 0, sizeof(s->block)); |
| 1449 |
if (decode_block(s, s->block, i,
|
| 1450 |
s->dc_index[i], s->ac_index[i], |
| 1451 |
s->quant_index[c]) < 0) {
|
| 1452 |
dprintf("error y=%d x=%d\n", mb_y, mb_x);
|
| 1453 |
return -1; |
| 1454 |
} |
| 1455 |
// dprintf("mb: %d %d processed\n", mb_y, mb_x);
|
| 1456 |
ptr = s->picture.data[c] + |
| 1457 |
(((s->linesize[c] * (v * mb_y + y) * 8) +
|
| 1458 |
(h * mb_x + x) * 8) >> s->avctx->lowres);
|
| 1459 |
if (s->interlaced && s->bottom_field)
|
| 1460 |
ptr += s->linesize[c] >> 1;
|
| 1461 |
//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);
|
| 1462 |
s->idct_put(ptr, s->linesize[c], s->block); |
| 1463 |
if (++x == h) {
|
| 1464 |
x = 0;
|
| 1465 |
y++; |
| 1466 |
} |
| 1467 |
} |
| 1468 |
} |
| 1469 |
/* (< 1350) buggy workaround for Spectralfan.mov, should be fixed */
|
| 1470 |
if (s->restart_interval && (s->restart_interval < 1350) && |
| 1471 |
!--s->restart_count) {
|
| 1472 |
align_get_bits(&s->gb); |
| 1473 |
skip_bits(&s->gb, 16); /* skip RSTn */ |
| 1474 |
for (i=0; i<nb_components; i++) /* reset dc */ |
| 1475 |
s->last_dc[i] = 1024;
|
| 1476 |
} |
| 1477 |
} |
| 1478 |
} |
| 1479 |
return 0; |
| 1480 |
} |
| 1481 |
|
| 1482 |
static int mjpeg_decode_sos(MJpegDecodeContext *s) |
| 1483 |
{
|
| 1484 |
int len, nb_components, i, h, v, predictor, point_transform;
|
| 1485 |
int vmax, hmax, index, id;
|
| 1486 |
const int block_size= s->lossless ? 1 : 8; |
| 1487 |
int ilv;
|
| 1488 |
|
| 1489 |
/* XXX: verify len field validity */
|
| 1490 |
len = get_bits(&s->gb, 16);
|
| 1491 |
nb_components = get_bits(&s->gb, 8);
|
| 1492 |
if (len != 6+2*nb_components) |
| 1493 |
{
|
| 1494 |
dprintf("decode_sos: invalid len (%d)\n", len);
|
| 1495 |
return -1; |
| 1496 |
} |
| 1497 |
/* XXX: only interleaved scan accepted */
|
| 1498 |
if (nb_components != s->nb_components)
|
| 1499 |
{
|
| 1500 |
dprintf("decode_sos: components(%d) mismatch\n", nb_components);
|
| 1501 |
return -1; |
| 1502 |
} |
| 1503 |
vmax = 0;
|
| 1504 |
hmax = 0;
|
| 1505 |
for(i=0;i<nb_components;i++) { |
| 1506 |
id = get_bits(&s->gb, 8) - 1; |
| 1507 |
dprintf("component: %d\n", id);
|
| 1508 |
/* find component index */
|
| 1509 |
for(index=0;index<s->nb_components;index++) |
| 1510 |
if (id == s->component_id[index])
|
| 1511 |
break;
|
| 1512 |
if (index == s->nb_components)
|
| 1513 |
{
|
| 1514 |
dprintf("decode_sos: index(%d) out of components\n", index);
|
| 1515 |
return -1; |
| 1516 |
} |
| 1517 |
|
| 1518 |
s->comp_index[i] = index; |
| 1519 |
|
| 1520 |
s->nb_blocks[i] = s->h_count[index] * s->v_count[index]; |
| 1521 |
s->h_scount[i] = s->h_count[index]; |
| 1522 |
s->v_scount[i] = s->v_count[index]; |
| 1523 |
|
| 1524 |
s->dc_index[i] = get_bits(&s->gb, 4);
|
| 1525 |
s->ac_index[i] = get_bits(&s->gb, 4);
|
| 1526 |
|
| 1527 |
if (s->dc_index[i] < 0 || s->ac_index[i] < 0 || |
| 1528 |
s->dc_index[i] >= 4 || s->ac_index[i] >= 4) |
| 1529 |
goto out_of_range;
|
| 1530 |
#if 0 //buggy
|
| 1531 |
switch(s->start_code)
|
| 1532 |
{
|
| 1533 |
case SOF0:
|
| 1534 |
if (dc_index[i] > 1 || ac_index[i] > 1)
|
| 1535 |
goto out_of_range;
|
| 1536 |
break;
|
| 1537 |
case SOF1:
|
| 1538 |
case SOF2:
|
| 1539 |
if (dc_index[i] > 3 || ac_index[i] > 3)
|
| 1540 |
goto out_of_range;
|
| 1541 |
break;
|
| 1542 |
case SOF3:
|
| 1543 |
if (dc_index[i] > 3 || ac_index[i] != 0)
|
| 1544 |
goto out_of_range;
|
| 1545 |
break;
|
| 1546 |
}
|
| 1547 |
#endif
|
| 1548 |
} |
| 1549 |
|
| 1550 |
predictor= get_bits(&s->gb, 8); /* JPEG Ss / lossless JPEG predictor /JPEG-LS NEAR */ |
| 1551 |
ilv= get_bits(&s->gb, 8); /* JPEG Se / JPEG-LS ILV */ |
| 1552 |
skip_bits(&s->gb, 4); /* Ah */ |
| 1553 |
point_transform= get_bits(&s->gb, 4); /* Al */ |
| 1554 |
|
| 1555 |
for(i=0;i<nb_components;i++) |
| 1556 |
s->last_dc[i] = 1024;
|
| 1557 |
|
| 1558 |
if (nb_components > 1) { |
| 1559 |
/* interleaved stream */
|
| 1560 |
s->mb_width = (s->width + s->h_max * block_size - 1) / (s->h_max * block_size);
|
| 1561 |
s->mb_height = (s->height + s->v_max * block_size - 1) / (s->v_max * block_size);
|
| 1562 |
} else {
|
| 1563 |
h = s->h_max / s->h_scount[s->comp_index[0]];
|
| 1564 |
v = s->v_max / s->v_scount[s->comp_index[0]];
|
| 1565 |
s->mb_width = (s->width + h * block_size - 1) / (h * block_size);
|
| 1566 |
s->mb_height = (s->height + v * block_size - 1) / (v * block_size);
|
| 1567 |
s->nb_blocks[0] = 1; |
| 1568 |
s->h_scount[0] = 1; |
| 1569 |
s->v_scount[0] = 1; |
| 1570 |
} |
| 1571 |
|
| 1572 |
if(s->avctx->debug & FF_DEBUG_PICT_INFO)
|
| 1573 |
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" : "", |
| 1574 |
predictor, point_transform, ilv, s->bits, |
| 1575 |
s->pegasus_rct ? "PRCT" : (s->rct ? "RCT" : "")); |
| 1576 |
|
| 1577 |
|
| 1578 |
/* mjpeg-b can have padding bytes between sos and image data, skip them */
|
| 1579 |
for (i = s->mjpb_skiptosod; i > 0; i--) |
| 1580 |
skip_bits(&s->gb, 8);
|
| 1581 |
|
| 1582 |
if(s->lossless){
|
| 1583 |
if(s->ls){
|
| 1584 |
// for(){
|
| 1585 |
}else{
|
| 1586 |
if(s->rgb){
|
| 1587 |
if(ljpeg_decode_rgb_scan(s, predictor, point_transform) < 0) |
| 1588 |
return -1; |
| 1589 |
}else{
|
| 1590 |
if(ljpeg_decode_yuv_scan(s, predictor, point_transform) < 0) |
| 1591 |
return -1; |
| 1592 |
} |
| 1593 |
} |
| 1594 |
}else{
|
| 1595 |
if(mjpeg_decode_scan(s) < 0) |
| 1596 |
return -1; |
| 1597 |
} |
| 1598 |
emms_c(); |
| 1599 |
return 0; |
| 1600 |
out_of_range:
|
| 1601 |
dprintf("decode_sos: ac/dc index out of range\n");
|
| 1602 |
return -1; |
| 1603 |
} |
| 1604 |
|
| 1605 |
static int mjpeg_decode_dri(MJpegDecodeContext *s) |
| 1606 |
{
|
| 1607 |
if (get_bits(&s->gb, 16) != 4) |
| 1608 |
return -1; |
| 1609 |
s->restart_interval = get_bits(&s->gb, 16);
|
| 1610 |
s->restart_count = 0;
|
| 1611 |
dprintf("restart interval: %d\n", s->restart_interval);
|
| 1612 |
|
| 1613 |
return 0; |
| 1614 |
} |
| 1615 |
|
| 1616 |
static int mjpeg_decode_app(MJpegDecodeContext *s) |
| 1617 |
{
|
| 1618 |
int len, id;
|
| 1619 |
|
| 1620 |
len = get_bits(&s->gb, 16);
|
| 1621 |
if (len < 5) |
| 1622 |
return -1; |
| 1623 |
if(8*len + get_bits_count(&s->gb) > s->gb.size_in_bits) |
| 1624 |
return -1; |
| 1625 |
|
| 1626 |
id = (get_bits(&s->gb, 16) << 16) | get_bits(&s->gb, 16); |
| 1627 |
id = be2me_32(id); |
| 1628 |
len -= 6;
|
| 1629 |
|
| 1630 |
if(s->avctx->debug & FF_DEBUG_STARTCODE){
|
| 1631 |
av_log(s->avctx, AV_LOG_DEBUG, "APPx %8X\n", id);
|
| 1632 |
} |
| 1633 |
|
| 1634 |
/* buggy AVID, it puts EOI only at every 10th frame */
|
| 1635 |
/* also this fourcc is used by non-avid files too, it holds some
|
| 1636 |
informations, but it's always present in AVID creates files */
|
| 1637 |
if (id == ff_get_fourcc("AVI1")) |
| 1638 |
{
|
| 1639 |
/* structure:
|
| 1640 |
4bytes AVI1
|
| 1641 |
1bytes polarity
|
| 1642 |
1bytes always zero
|
| 1643 |
4bytes field_size
|
| 1644 |
4bytes field_size_less_padding
|
| 1645 |
*/
|
| 1646 |
s->buggy_avid = 1;
|
| 1647 |
// if (s->first_picture)
|
| 1648 |
// printf("mjpeg: workarounding buggy AVID\n");
|
| 1649 |
s->interlace_polarity = get_bits(&s->gb, 8);
|
| 1650 |
#if 0
|
| 1651 |
skip_bits(&s->gb, 8);
|
| 1652 |
skip_bits(&s->gb, 32);
|
| 1653 |
skip_bits(&s->gb, 32);
|
| 1654 |
len -= 10;
|
| 1655 |
#endif
|
| 1656 |
// if (s->interlace_polarity)
|
| 1657 |
// printf("mjpeg: interlace polarity: %d\n", s->interlace_polarity);
|
| 1658 |
goto out;
|
| 1659 |
} |
| 1660 |
|
| 1661 |
// len -= 2;
|
| 1662 |
|
| 1663 |
if (id == ff_get_fourcc("JFIF")) |
| 1664 |
{
|
| 1665 |
int t_w, t_h, v1, v2;
|
| 1666 |
skip_bits(&s->gb, 8); /* the trailing zero-byte */ |
| 1667 |
v1= get_bits(&s->gb, 8);
|
| 1668 |
v2= get_bits(&s->gb, 8);
|
| 1669 |
skip_bits(&s->gb, 8);
|
| 1670 |
|
| 1671 |
s->avctx->sample_aspect_ratio.num= get_bits(&s->gb, 16);
|
| 1672 |
s->avctx->sample_aspect_ratio.den= get_bits(&s->gb, 16);
|
| 1673 |
|
| 1674 |
if (s->avctx->debug & FF_DEBUG_PICT_INFO)
|
| 1675 |
av_log(s->avctx, AV_LOG_INFO, "mjpeg: JFIF header found (version: %x.%x) SAR=%d/%d\n",
|
| 1676 |
v1, v2, |
| 1677 |
s->avctx->sample_aspect_ratio.num, |
| 1678 |
s->avctx->sample_aspect_ratio.den |
| 1679 |
); |
| 1680 |
|
| 1681 |
t_w = get_bits(&s->gb, 8);
|
| 1682 |
t_h = get_bits(&s->gb, 8);
|
| 1683 |
if (t_w && t_h)
|
| 1684 |
{
|
| 1685 |
/* skip thumbnail */
|
| 1686 |
if (len-10-(t_w*t_h*3) > 0) |
| 1687 |
len -= t_w*t_h*3;
|
| 1688 |
} |
| 1689 |
len -= 10;
|
| 1690 |
goto out;
|
| 1691 |
} |
| 1692 |
|
| 1693 |
if (id == ff_get_fourcc("Adob") && (get_bits(&s->gb, 8) == 'e')) |
| 1694 |
{
|
| 1695 |
if (s->avctx->debug & FF_DEBUG_PICT_INFO)
|
| 1696 |
av_log(s->avctx, AV_LOG_INFO, "mjpeg: Adobe header found\n");
|
| 1697 |
skip_bits(&s->gb, 16); /* version */ |
| 1698 |
skip_bits(&s->gb, 16); /* flags0 */ |
| 1699 |
skip_bits(&s->gb, 16); /* flags1 */ |
| 1700 |
skip_bits(&s->gb, 8); /* transform */ |
| 1701 |
len -= 7;
|
| 1702 |
goto out;
|
| 1703 |
} |
| 1704 |
|
| 1705 |
if (id == ff_get_fourcc("LJIF")){ |
| 1706 |
if (s->avctx->debug & FF_DEBUG_PICT_INFO)
|
| 1707 |
av_log(s->avctx, AV_LOG_INFO, "Pegasus lossless jpeg header found\n");
|
| 1708 |
skip_bits(&s->gb, 16); /* version ? */ |
| 1709 |
skip_bits(&s->gb, 16); /* unknwon always 0? */ |
| 1710 |
skip_bits(&s->gb, 16); /* unknwon always 0? */ |
| 1711 |
skip_bits(&s->gb, 16); /* unknwon always 0? */ |
| 1712 |
switch( get_bits(&s->gb, 8)){ |
| 1713 |
case 1: |
| 1714 |
s->rgb= 1;
|
| 1715 |
s->pegasus_rct=0;
|
| 1716 |
break;
|
| 1717 |
case 2: |
| 1718 |
s->rgb= 1;
|
| 1719 |
s->pegasus_rct=1;
|
| 1720 |
break;
|
| 1721 |
default:
|
| 1722 |
av_log(s->avctx, AV_LOG_ERROR, "unknown colorspace\n");
|
| 1723 |
} |
| 1724 |
len -= 9;
|
| 1725 |
goto out;
|
| 1726 |
} |
| 1727 |
|
| 1728 |
/* Apple MJPEG-A */
|
| 1729 |
if ((s->start_code == APP1) && (len > (0x28 - 8))) |
| 1730 |
{
|
| 1731 |
id = (get_bits(&s->gb, 16) << 16) | get_bits(&s->gb, 16); |
| 1732 |
id = be2me_32(id); |
| 1733 |
len -= 4;
|
| 1734 |
if (id == ff_get_fourcc("mjpg")) /* Apple MJPEG-A */ |
| 1735 |
{
|
| 1736 |
#if 0
|
| 1737 |
skip_bits(&s->gb, 32); /* field size */
|
| 1738 |
skip_bits(&s->gb, 32); /* pad field size */
|
| 1739 |
skip_bits(&s->gb, 32); /* next off */
|
| 1740 |
skip_bits(&s->gb, 32); /* quant off */
|
| 1741 |
skip_bits(&s->gb, 32); /* huff off */
|
| 1742 |
skip_bits(&s->gb, 32); /* image off */
|
| 1743 |
skip_bits(&s->gb, 32); /* scan off */
|
| 1744 |
skip_bits(&s->gb, 32); /* data off */
|
| 1745 |
#endif
|
| 1746 |
if (s->avctx->debug & FF_DEBUG_PICT_INFO)
|
| 1747 |
av_log(s->avctx, AV_LOG_INFO, "mjpeg: Apple MJPEG-A header found\n");
|
| 1748 |
} |
| 1749 |
} |
| 1750 |
|
| 1751 |
out:
|
| 1752 |
/* slow but needed for extreme adobe jpegs */
|
| 1753 |
if (len < 0) |
| 1754 |
av_log(s->avctx, AV_LOG_ERROR, "mjpeg: error, decode_app parser read over the end\n");
|
| 1755 |
while(--len > 0) |
| 1756 |
skip_bits(&s->gb, 8);
|
| 1757 |
|
| 1758 |
return 0; |
| 1759 |
} |
| 1760 |
|
| 1761 |
static int mjpeg_decode_com(MJpegDecodeContext *s) |
| 1762 |
{
|
| 1763 |
int len = get_bits(&s->gb, 16); |
| 1764 |
if (len >= 2 && 8*len - 16 + get_bits_count(&s->gb) <= s->gb.size_in_bits) { |
| 1765 |
uint8_t *cbuf = av_malloc(len - 1);
|
| 1766 |
if (cbuf) {
|
| 1767 |
int i;
|
| 1768 |
for (i = 0; i < len - 2; i++) |
| 1769 |
cbuf[i] = get_bits(&s->gb, 8);
|
| 1770 |
if (i > 0 && cbuf[i-1] == '\n') |
| 1771 |
cbuf[i-1] = 0; |
| 1772 |
else
|
| 1773 |
cbuf[i] = 0;
|
| 1774 |
|
| 1775 |
if(s->avctx->debug & FF_DEBUG_PICT_INFO)
|
| 1776 |
av_log(s->avctx, AV_LOG_INFO, "mjpeg comment: '%s'\n", cbuf);
|
| 1777 |
|
| 1778 |
/* buggy avid, it puts EOI only at every 10th frame */
|
| 1779 |
if (!strcmp(cbuf, "AVID")) |
| 1780 |
{
|
| 1781 |
s->buggy_avid = 1;
|
| 1782 |
// if (s->first_picture)
|
| 1783 |
// printf("mjpeg: workarounding buggy AVID\n");
|
| 1784 |
} |
| 1785 |
else if(!strcmp(cbuf, "CS=ITU601")){ |
| 1786 |
s->cs_itu601= 1;
|
| 1787 |
} |
| 1788 |
|
| 1789 |
av_free(cbuf); |
| 1790 |
} |
| 1791 |
} |
| 1792 |
|
| 1793 |
return 0; |
| 1794 |
} |
| 1795 |
|
| 1796 |
#if 0
|
| 1797 |
static int valid_marker_list[] =
|
| 1798 |
{
|
| 1799 |
/* 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, a, b, c, d, e, f */
|
| 1800 |
/* 0 */ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
|
| 1801 |
/* 1 */ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
|
| 1802 |
/* 2 */ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
|
| 1803 |
/* 3 */ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
|
| 1804 |
/* 4 */ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
|
| 1805 |
/* 5 */ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
|
| 1806 |
/* 6 */ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
|
| 1807 |
/* 7 */ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
|
| 1808 |
/* 8 */ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
|
| 1809 |
/* 9 */ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
|
| 1810 |
/* a */ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
|
| 1811 |
/* b */ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
|
| 1812 |
/* c */ 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
|
| 1813 |
/* d */ 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
|
| 1814 |
/* e */ 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
|
| 1815 |
/* f */ 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0,
|
| 1816 |
}
|
| 1817 |
#endif
|
| 1818 |
|
| 1819 |
/* return the 8 bit start code value and update the search
|
| 1820 |
state. Return -1 if no start code found */
|
| 1821 |
static int find_marker(uint8_t **pbuf_ptr, uint8_t *buf_end) |
| 1822 |
{
|
| 1823 |
uint8_t *buf_ptr; |
| 1824 |
unsigned int v, v2; |
| 1825 |
int val;
|
| 1826 |
#ifdef DEBUG
|
| 1827 |
int skipped=0; |
| 1828 |
#endif
|
| 1829 |
|
| 1830 |
buf_ptr = *pbuf_ptr; |
| 1831 |
while (buf_ptr < buf_end) {
|
| 1832 |
v = *buf_ptr++; |
| 1833 |
v2 = *buf_ptr; |
| 1834 |
if ((v == 0xff) && (v2 >= 0xc0) && (v2 <= 0xfe) && buf_ptr < buf_end) { |
| 1835 |
val = *buf_ptr++; |
| 1836 |
goto found;
|
| 1837 |
} |
| 1838 |
#ifdef DEBUG
|
| 1839 |
skipped++; |
| 1840 |
#endif
|
| 1841 |
} |
| 1842 |
val = -1;
|
| 1843 |
found:
|
| 1844 |
#ifdef DEBUG
|
| 1845 |
dprintf("find_marker skipped %d bytes\n", skipped);
|
| 1846 |
#endif
|
| 1847 |
*pbuf_ptr = buf_ptr; |
| 1848 |
return val;
|
| 1849 |
} |
| 1850 |
|
| 1851 |
static int mjpeg_decode_frame(AVCodecContext *avctx, |
| 1852 |
void *data, int *data_size, |
| 1853 |
uint8_t *buf, int buf_size)
|
| 1854 |
{
|
| 1855 |
MJpegDecodeContext *s = avctx->priv_data; |
| 1856 |
uint8_t *buf_end, *buf_ptr; |
| 1857 |
int start_code;
|
| 1858 |
AVFrame *picture = data; |
| 1859 |
|
| 1860 |
buf_ptr = buf; |
| 1861 |
buf_end = buf + buf_size; |
| 1862 |
while (buf_ptr < buf_end) {
|
| 1863 |
/* find start next marker */
|
| 1864 |
start_code = find_marker(&buf_ptr, buf_end); |
| 1865 |
{
|
| 1866 |
/* EOF */
|
| 1867 |
if (start_code < 0) { |
| 1868 |
goto the_end;
|
| 1869 |
} else {
|
| 1870 |
dprintf("marker=%x avail_size_in_buf=%d\n", start_code, buf_end - buf_ptr);
|
| 1871 |
|
| 1872 |
if ((buf_end - buf_ptr) > s->buffer_size)
|
| 1873 |
{
|
| 1874 |
av_free(s->buffer); |
| 1875 |
s->buffer_size = buf_end-buf_ptr; |
| 1876 |
s->buffer = av_malloc(s->buffer_size + FF_INPUT_BUFFER_PADDING_SIZE); |
| 1877 |
dprintf("buffer too small, expanding to %d bytes\n",
|
| 1878 |
s->buffer_size); |
| 1879 |
} |
| 1880 |
|
| 1881 |
/* unescape buffer of SOS */
|
| 1882 |
if (start_code == SOS)
|
| 1883 |
{
|
| 1884 |
uint8_t *src = buf_ptr; |
| 1885 |
uint8_t *dst = s->buffer; |
| 1886 |
|
| 1887 |
while (src<buf_end)
|
| 1888 |
{
|
| 1889 |
uint8_t x = *(src++); |
| 1890 |
|
| 1891 |
*(dst++) = x; |
| 1892 |
if (x == 0xff) |
| 1893 |
{
|
| 1894 |
while(src<buf_end && x == 0xff) |
| 1895 |
x = *(src++); |
| 1896 |
|
| 1897 |
if (x >= 0xd0 && x <= 0xd7) |
| 1898 |
*(dst++) = x; |
| 1899 |
else if (x) |
| 1900 |
break;
|
| 1901 |
} |
| 1902 |
} |
| 1903 |
init_get_bits(&s->gb, s->buffer, (dst - s->buffer)*8);
|
| 1904 |
|
| 1905 |
dprintf("escaping removed %d bytes\n",
|
| 1906 |
(buf_end - buf_ptr) - (dst - s->buffer)); |
| 1907 |
} |
| 1908 |
else
|
| 1909 |
init_get_bits(&s->gb, buf_ptr, (buf_end - buf_ptr)*8);
|
| 1910 |
|
| 1911 |
s->start_code = start_code; |
| 1912 |
if(s->avctx->debug & FF_DEBUG_STARTCODE){
|
| 1913 |
av_log(s->avctx, AV_LOG_DEBUG, "startcode: %X\n", start_code);
|
| 1914 |
} |
| 1915 |
|
| 1916 |
/* process markers */
|
| 1917 |
if (start_code >= 0xd0 && start_code <= 0xd7) { |
| 1918 |
dprintf("restart marker: %d\n", start_code&0x0f); |
| 1919 |
/* APP fields */
|
| 1920 |
} else if (start_code >= APP0 && start_code <= APP15) { |
| 1921 |
mjpeg_decode_app(s); |
| 1922 |
/* Comment */
|
| 1923 |
} else if (start_code == COM){ |
| 1924 |
mjpeg_decode_com(s); |
| 1925 |
} |
| 1926 |
|
| 1927 |
switch(start_code) {
|
| 1928 |
case SOI:
|
| 1929 |
s->restart_interval = 0;
|
| 1930 |
reset_ls_coding_parameters(s, 1);
|
| 1931 |
|
| 1932 |
s->restart_count = 0;
|
| 1933 |
/* nothing to do on SOI */
|
| 1934 |
break;
|
| 1935 |
case DQT:
|
| 1936 |
mjpeg_decode_dqt(s); |
| 1937 |
break;
|
| 1938 |
case DHT:
|
| 1939 |
if(mjpeg_decode_dht(s) < 0){ |
| 1940 |
av_log(s->avctx, AV_LOG_ERROR, "huffman table decode error\n");
|
| 1941 |
return -1; |
| 1942 |
} |
| 1943 |
break;
|
| 1944 |
case SOF0:
|
| 1945 |
s->lossless=0;
|
| 1946 |
if (mjpeg_decode_sof(s) < 0) |
| 1947 |
return -1; |
| 1948 |
break;
|
| 1949 |
case SOF3:
|
| 1950 |
s->lossless=1;
|
| 1951 |
if (mjpeg_decode_sof(s) < 0) |
| 1952 |
return -1; |
| 1953 |
break;
|
| 1954 |
case SOF48:
|
| 1955 |
s->lossless=1;
|
| 1956 |
s->ls=1;
|
| 1957 |
if (mjpeg_decode_sof(s) < 0) |
| 1958 |
return -1; |
| 1959 |
break;
|
| 1960 |
case LSE:
|
| 1961 |
if (decode_lse(s) < 0) |
| 1962 |
return -1; |
| 1963 |
break;
|
| 1964 |
case EOI:
|
| 1965 |
if ((s->buggy_avid && !s->interlaced) || s->restart_interval)
|
| 1966 |
break;
|
| 1967 |
eoi_parser:
|
| 1968 |
{
|
| 1969 |
if (s->interlaced) {
|
| 1970 |
s->bottom_field ^= 1;
|
| 1971 |
/* if not bottom field, do not output image yet */
|
| 1972 |
if (s->bottom_field)
|
| 1973 |
goto not_the_end;
|
| 1974 |
} |
| 1975 |
*picture = s->picture; |
| 1976 |
*data_size = sizeof(AVFrame);
|
| 1977 |
|
| 1978 |
if(!s->lossless){
|
| 1979 |
picture->quality= FFMAX(FFMAX(s->qscale[0], s->qscale[1]), s->qscale[2]); |
| 1980 |
picture->qstride= 0;
|
| 1981 |
picture->qscale_table= s->qscale_table; |
| 1982 |
memset(picture->qscale_table, picture->quality, (s->width+15)/16); |
| 1983 |
if(avctx->debug & FF_DEBUG_QP)
|
| 1984 |
av_log(s->avctx, AV_LOG_DEBUG, "QP: %d\n", picture->quality);
|
| 1985 |
picture->quality*= FF_QP2LAMBDA; |
| 1986 |
} |
| 1987 |
|
| 1988 |
goto the_end;
|
| 1989 |
} |
| 1990 |
break;
|
| 1991 |
case SOS:
|
| 1992 |
mjpeg_decode_sos(s); |
| 1993 |
/* buggy avid puts EOI every 10-20th frame */
|
| 1994 |
/* if restart period is over process EOI */
|
| 1995 |
if ((s->buggy_avid && !s->interlaced) || s->restart_interval)
|
| 1996 |
goto eoi_parser;
|
| 1997 |
break;
|
| 1998 |
case DRI:
|
| 1999 |
mjpeg_decode_dri(s); |
| 2000 |
break;
|
| 2001 |
case SOF1:
|
| 2002 |
case SOF2:
|
| 2003 |
case SOF5:
|
| 2004 |
case SOF6:
|
| 2005 |
case SOF7:
|
| 2006 |
case SOF9:
|
| 2007 |
case SOF10:
|
| 2008 |
case SOF11:
|
| 2009 |
case SOF13:
|
| 2010 |
case SOF14:
|
| 2011 |
case SOF15:
|
| 2012 |
case JPG:
|
| 2013 |
av_log(s->avctx, AV_LOG_ERROR, "mjpeg: unsupported coding type (%x)\n", start_code);
|
| 2014 |
break;
|
| 2015 |
// default:
|
| 2016 |
// printf("mjpeg: unsupported marker (%x)\n", start_code);
|
| 2017 |
// break;
|
| 2018 |
} |
| 2019 |
|
| 2020 |
not_the_end:
|
| 2021 |
/* eof process start code */
|
| 2022 |
buf_ptr += (get_bits_count(&s->gb)+7)/8; |
| 2023 |
dprintf("marker parser used %d bytes (%d bits)\n",
|
| 2024 |
(get_bits_count(&s->gb)+7)/8, get_bits_count(&s->gb)); |
| 2025 |
} |
| 2026 |
} |
| 2027 |
} |
| 2028 |
the_end:
|
| 2029 |
dprintf("mjpeg decode frame unused %d bytes\n", buf_end - buf_ptr);
|
| 2030 |
// return buf_end - buf_ptr;
|
| 2031 |
return buf_ptr - buf;
|
| 2032 |
} |
| 2033 |
|
| 2034 |
static int mjpegb_decode_frame(AVCodecContext *avctx, |
| 2035 |
void *data, int *data_size, |
| 2036 |
uint8_t *buf, int buf_size)
|
| 2037 |
{
|
| 2038 |
MJpegDecodeContext *s = avctx->priv_data; |
| 2039 |
uint8_t *buf_end, *buf_ptr; |
| 2040 |
AVFrame *picture = data; |
| 2041 |
GetBitContext hgb; /* for the header */
|
| 2042 |
uint32_t dqt_offs, dht_offs, sof_offs, sos_offs, second_field_offs; |
| 2043 |
uint32_t field_size, sod_offs; |
| 2044 |
|
| 2045 |
buf_ptr = buf; |
| 2046 |
buf_end = buf + buf_size; |
| 2047 |
|
| 2048 |
read_header:
|
| 2049 |
/* reset on every SOI */
|
| 2050 |
s->restart_interval = 0;
|
| 2051 |
s->restart_count = 0;
|
| 2052 |
s->mjpb_skiptosod = 0;
|
| 2053 |
|
| 2054 |
init_get_bits(&hgb, buf_ptr, /*buf_size*/(buf_end - buf_ptr)*8); |
| 2055 |
|
| 2056 |
skip_bits(&hgb, 32); /* reserved zeros */ |
| 2057 |
|
| 2058 |
if (get_bits_long(&hgb, 32) != be2me_32(ff_get_fourcc("mjpg"))) |
| 2059 |
{
|
| 2060 |
dprintf("not mjpeg-b (bad fourcc)\n");
|
| 2061 |
return 0; |
| 2062 |
} |
| 2063 |
|
| 2064 |
field_size = get_bits_long(&hgb, 32); /* field size */ |
| 2065 |
dprintf("field size: 0x%x\n", field_size);
|
| 2066 |
skip_bits(&hgb, 32); /* padded field size */ |
| 2067 |
second_field_offs = get_bits_long(&hgb, 32);
|
| 2068 |
dprintf("second field offs: 0x%x\n", second_field_offs);
|
| 2069 |
if (second_field_offs)
|
| 2070 |
s->interlaced = 1;
|
| 2071 |
|
| 2072 |
dqt_offs = get_bits_long(&hgb, 32);
|
| 2073 |
dprintf("dqt offs: 0x%x\n", dqt_offs);
|
| 2074 |
if (dqt_offs)
|
| 2075 |
{
|
| 2076 |
init_get_bits(&s->gb, buf+dqt_offs, (buf_end - (buf+dqt_offs))*8);
|
| 2077 |
s->start_code = DQT; |
| 2078 |
mjpeg_decode_dqt(s); |
| 2079 |
} |
| 2080 |
|
| 2081 |
dht_offs = get_bits_long(&hgb, 32);
|
| 2082 |
dprintf("dht offs: 0x%x\n", dht_offs);
|
| 2083 |
if (dht_offs)
|
| 2084 |
{
|
| 2085 |
init_get_bits(&s->gb, buf+dht_offs, (buf_end - (buf+dht_offs))*8);
|
| 2086 |
s->start_code = DHT; |
| 2087 |
mjpeg_decode_dht(s); |
| 2088 |
} |
| 2089 |
|
| 2090 |
sof_offs = get_bits_long(&hgb, 32);
|
| 2091 |
dprintf("sof offs: 0x%x\n", sof_offs);
|
| 2092 |
if (sof_offs)
|
| 2093 |
{
|
| 2094 |
init_get_bits(&s->gb, buf+sof_offs, (buf_end - (buf+sof_offs))*8);
|
| 2095 |
s->start_code = SOF0; |
| 2096 |
if (mjpeg_decode_sof(s) < 0) |
| 2097 |
return -1; |
| 2098 |
} |
| 2099 |
|
| 2100 |
sos_offs = get_bits_long(&hgb, 32);
|
| 2101 |
dprintf("sos offs: 0x%x\n", sos_offs);
|
| 2102 |
sod_offs = get_bits_long(&hgb, 32);
|
| 2103 |
dprintf("sod offs: 0x%x\n", sod_offs);
|
| 2104 |
if (sos_offs)
|
| 2105 |
{
|
| 2106 |
// init_get_bits(&s->gb, buf+sos_offs, (buf_end - (buf+sos_offs))*8);
|
| 2107 |
init_get_bits(&s->gb, buf+sos_offs, field_size*8);
|
| 2108 |
s->mjpb_skiptosod = (sod_offs - sos_offs - show_bits(&s->gb, 16));
|
| 2109 |
s->start_code = SOS; |
| 2110 |
mjpeg_decode_sos(s); |
| 2111 |
} |
| 2112 |
|
| 2113 |
if (s->interlaced) {
|
| 2114 |
s->bottom_field ^= 1;
|
| 2115 |
/* if not bottom field, do not output image yet */
|
| 2116 |
if (s->bottom_field && second_field_offs)
|
| 2117 |
{
|
| 2118 |
buf_ptr = buf + second_field_offs; |
| 2119 |
second_field_offs = 0;
|
| 2120 |
goto read_header;
|
| 2121 |
} |
| 2122 |
} |
| 2123 |
|
| 2124 |
//XXX FIXME factorize, this looks very similar to the EOI code
|
| 2125 |
|
| 2126 |
*picture= s->picture; |
| 2127 |
*data_size = sizeof(AVFrame);
|
| 2128 |
|
| 2129 |
if(!s->lossless){
|
| 2130 |
picture->quality= FFMAX(FFMAX(s->qscale[0], s->qscale[1]), s->qscale[2]); |
| 2131 |
picture->qstride= 0;
|
| 2132 |
picture->qscale_table= s->qscale_table; |
| 2133 |
memset(picture->qscale_table, picture->quality, (s->width+15)/16); |
| 2134 |
if(avctx->debug & FF_DEBUG_QP)
|
| 2135 |
av_log(avctx, AV_LOG_DEBUG, "QP: %d\n", picture->quality);
|
| 2136 |
picture->quality*= FF_QP2LAMBDA; |
| 2137 |
} |
| 2138 |
|
| 2139 |
return buf_ptr - buf;
|
| 2140 |
} |
| 2141 |
|
| 2142 |
#include "sp5x.h" |
| 2143 |
|
| 2144 |
static int sp5x_decode_frame(AVCodecContext *avctx, |
| 2145 |
void *data, int *data_size, |
| 2146 |
uint8_t *buf, int buf_size)
|
| 2147 |
{
|
| 2148 |
#if 0
|
| 2149 |
MJpegDecodeContext *s = avctx->priv_data;
|
| 2150 |
#endif
|
| 2151 |
const int qscale = 5; |
| 2152 |
uint8_t *buf_ptr, *buf_end, *recoded; |
| 2153 |
int i = 0, j = 0; |
| 2154 |
|
| 2155 |
if (!avctx->width || !avctx->height)
|
| 2156 |
return -1; |
| 2157 |
|
| 2158 |
buf_ptr = buf; |
| 2159 |
buf_end = buf + buf_size; |
| 2160 |
|
| 2161 |
#if 1 |
| 2162 |
recoded = av_mallocz(buf_size + 1024);
|
| 2163 |
if (!recoded)
|
| 2164 |
return -1; |
| 2165 |
|
| 2166 |
/* SOI */
|
| 2167 |
recoded[j++] = 0xFF;
|
| 2168 |
recoded[j++] = 0xD8;
|
| 2169 |
|
| 2170 |
memcpy(recoded+j, &sp5x_data_dqt[0], sizeof(sp5x_data_dqt)); |
| 2171 |
memcpy(recoded+j+5, &sp5x_quant_table[qscale * 2], 64); |
| 2172 |
memcpy(recoded+j+70, &sp5x_quant_table[(qscale * 2) + 1], 64); |
| 2173 |
j += sizeof(sp5x_data_dqt);
|
| 2174 |
|
| 2175 |
memcpy(recoded+j, &sp5x_data_dht[0], sizeof(sp5x_data_dht)); |
| 2176 |
j += sizeof(sp5x_data_dht);
|
| 2177 |
|
| 2178 |
memcpy(recoded+j, &sp5x_data_sof[0], sizeof(sp5x_data_sof)); |
| 2179 |
recoded[j+5] = (avctx->coded_height >> 8) & 0xFF; |
| 2180 |
recoded[j+6] = avctx->coded_height & 0xFF; |
| 2181 |
recoded[j+7] = (avctx->coded_width >> 8) & 0xFF; |
| 2182 |
recoded[j+8] = avctx->coded_width & 0xFF; |
| 2183 |
j += sizeof(sp5x_data_sof);
|
| 2184 |
|
| 2185 |
memcpy(recoded+j, &sp5x_data_sos[0], sizeof(sp5x_data_sos)); |
| 2186 |
j += sizeof(sp5x_data_sos);
|
| 2187 |
|
| 2188 |
for (i = 14; i < buf_size && j < buf_size+1024-2; i++) |
| 2189 |
{
|
| 2190 |
recoded[j++] = buf[i]; |
| 2191 |
if (buf[i] == 0xff) |
| 2192 |
recoded[j++] = 0;
|
| 2193 |
} |
| 2194 |
|
| 2195 |
/* EOI */
|
| 2196 |
recoded[j++] = 0xFF;
|
| 2197 |
recoded[j++] = 0xD9;
|
| 2198 |
|
| 2199 |
i = mjpeg_decode_frame(avctx, data, data_size, recoded, j); |
| 2200 |
|
| 2201 |
av_free(recoded); |
| 2202 |
|
| 2203 |
#else
|
| 2204 |
/* SOF */
|
| 2205 |
s->bits = 8;
|
| 2206 |
s->width = avctx->coded_width; |
| 2207 |
s->height = avctx->coded_height; |
| 2208 |
s->nb_components = 3;
|
| 2209 |
s->component_id[0] = 0; |
| 2210 |
s->h_count[0] = 2; |
| 2211 |
s->v_count[0] = 2; |
| 2212 |
s->quant_index[0] = 0; |
| 2213 |
s->component_id[1] = 1; |
| 2214 |
s->h_count[1] = 1; |
| 2215 |
s->v_count[1] = 1; |
| 2216 |
s->quant_index[1] = 1; |
| 2217 |
s->component_id[2] = 2; |
| 2218 |
s->h_count[2] = 1; |
| 2219 |
s->v_count[2] = 1; |
| 2220 |
s->quant_index[2] = 1; |
| 2221 |
s->h_max = 2;
|
| 2222 |
s->v_max = 2;
|
| 2223 |
|
| 2224 |
s->qscale_table = av_mallocz((s->width+15)/16); |
| 2225 |
avctx->pix_fmt = s->cs_itu601 ? PIX_FMT_YUV420P : PIX_FMT_YUVJ420; |
| 2226 |
s->interlaced = 0;
|
| 2227 |
|
| 2228 |
s->picture.reference = 0;
|
| 2229 |
if (avctx->get_buffer(avctx, &s->picture) < 0) |
| 2230 |
{
|
| 2231 |
av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
|
| 2232 |
return -1; |
| 2233 |
} |
| 2234 |
|
| 2235 |
s->picture.pict_type = I_TYPE; |
| 2236 |
s->picture.key_frame = 1;
|
| 2237 |
|
| 2238 |
for (i = 0; i < 3; i++) |
| 2239 |
s->linesize[i] = s->picture.linesize[i] << s->interlaced; |
| 2240 |
|
| 2241 |
/* DQT */
|
| 2242 |
for (i = 0; i < 64; i++) |
| 2243 |
{
|
| 2244 |
j = s->scantable.permutated[i]; |
| 2245 |
s->quant_matrixes[0][j] = sp5x_quant_table[(qscale * 2) + i]; |
| 2246 |
} |
| 2247 |
s->qscale[0] = FFMAX(
|
| 2248 |
s->quant_matrixes[0][s->scantable.permutated[1]], |
| 2249 |
s->quant_matrixes[0][s->scantable.permutated[8]]) >> 1; |
| 2250 |
|
| 2251 |
for (i = 0; i < 64; i++) |
| 2252 |
{
|
| 2253 |
j = s->scantable.permutated[i]; |
| 2254 |
s->quant_matrixes[1][j] = sp5x_quant_table[(qscale * 2) + 1 + i]; |
| 2255 |
} |
| 2256 |
s->qscale[1] = FFMAX(
|
| 2257 |
s->quant_matrixes[1][s->scantable.permutated[1]], |
| 2258 |
s->quant_matrixes[1][s->scantable.permutated[8]]) >> 1; |
| 2259 |
|
| 2260 |
/* DHT */
|
| 2261 |
|
| 2262 |
/* SOS */
|
| 2263 |
s->comp_index[0] = 0; |
| 2264 |
s->nb_blocks[0] = s->h_count[0] * s->v_count[0]; |
| 2265 |
s->h_scount[0] = s->h_count[0]; |
| 2266 |
s->v_scount[0] = s->v_count[0]; |
| 2267 |
s->dc_index[0] = 0; |
| 2268 |
s->ac_index[0] = 0; |
| 2269 |
|
| 2270 |
s->comp_index[1] = 1; |
| 2271 |
s->nb_blocks[1] = s->h_count[1] * s->v_count[1]; |
| 2272 |
s->h_scount[1] = s->h_count[1]; |
| 2273 |
s->v_scount[1] = s->v_count[1]; |
| 2274 |
s->dc_index[1] = 1; |
| 2275 |
s->ac_index[1] = 1; |
| 2276 |
|
| 2277 |
s->comp_index[2] = 2; |
| 2278 |
s->nb_blocks[2] = s->h_count[2] * s->v_count[2]; |
| 2279 |
s->h_scount[2] = s->h_count[2]; |
| 2280 |
s->v_scount[2] = s->v_count[2]; |
| 2281 |
s->dc_index[2] = 1; |
| 2282 |
s->ac_index[2] = 1; |
| 2283 |
|
| 2284 |
for (i = 0; i < 3; i++) |
| 2285 |
s->last_dc[i] = 1024;
|
| 2286 |
|
| 2287 |
s->mb_width = (s->width * s->h_max * 8 -1) / (s->h_max * 8); |
| 2288 |
s->mb_height = (s->height * s->v_max * 8 -1) / (s->v_max * 8); |
| 2289 |
|
| 2290 |
init_get_bits(&s->gb, buf+14, (buf_size-14)*8); |
| 2291 |
|
| 2292 |
return mjpeg_decode_scan(s);
|
| 2293 |
#endif
|
| 2294 |
|
| 2295 |
return i;
|
| 2296 |
} |
| 2297 |
|
| 2298 |
static int mjpeg_decode_end(AVCodecContext *avctx) |
| 2299 |
{
|
| 2300 |
MJpegDecodeContext *s = avctx->priv_data; |
| 2301 |
int i, j;
|
| 2302 |
|
| 2303 |
av_free(s->buffer); |
| 2304 |
av_free(s->qscale_table); |
| 2305 |
|
| 2306 |
for(i=0;i<2;i++) { |
| 2307 |
for(j=0;j<4;j++) |
| 2308 |
free_vlc(&s->vlcs[i][j]); |
| 2309 |
} |
| 2310 |
return 0; |
| 2311 |
} |
| 2312 |
|
| 2313 |
AVCodec mjpeg_decoder = {
|
| 2314 |
"mjpeg",
|
| 2315 |
CODEC_TYPE_VIDEO, |
| 2316 |
CODEC_ID_MJPEG, |
| 2317 |
sizeof(MJpegDecodeContext),
|
| 2318 |
mjpeg_decode_init, |
| 2319 |
NULL,
|
| 2320 |
mjpeg_decode_end, |
| 2321 |
mjpeg_decode_frame, |
| 2322 |
CODEC_CAP_DR1, |
| 2323 |
NULL
|
| 2324 |
}; |
| 2325 |
|
| 2326 |
AVCodec mjpegb_decoder = {
|
| 2327 |
"mjpegb",
|
| 2328 |
CODEC_TYPE_VIDEO, |
| 2329 |
CODEC_ID_MJPEGB, |
| 2330 |
sizeof(MJpegDecodeContext),
|
| 2331 |
mjpeg_decode_init, |
| 2332 |
NULL,
|
| 2333 |
mjpeg_decode_end, |
| 2334 |
mjpegb_decode_frame, |
| 2335 |
CODEC_CAP_DR1, |
| 2336 |
NULL
|
| 2337 |
}; |
| 2338 |
|
| 2339 |
AVCodec sp5x_decoder = {
|
| 2340 |
"sp5x",
|
| 2341 |
CODEC_TYPE_VIDEO, |
| 2342 |
CODEC_ID_SP5X, |
| 2343 |
sizeof(MJpegDecodeContext),
|
| 2344 |
mjpeg_decode_init, |
| 2345 |
NULL,
|
| 2346 |
mjpeg_decode_end, |
| 2347 |
sp5x_decode_frame, |
| 2348 |
CODEC_CAP_DR1, |
| 2349 |
NULL
|
| 2350 |
}; |
| 2351 |
|
| 2352 |
#ifdef CONFIG_ENCODERS
|
| 2353 |
AVCodec ljpeg_encoder = { //FIXME avoid MPV_* lossless jpeg shouldnt need them
|
| 2354 |
"ljpeg",
|
| 2355 |
CODEC_TYPE_VIDEO, |
| 2356 |
CODEC_ID_LJPEG, |
| 2357 |
sizeof(MpegEncContext),
|
| 2358 |
MPV_encode_init, |
| 2359 |
encode_picture_lossless, |
| 2360 |
MPV_encode_end, |
| 2361 |
}; |
| 2362 |
#endif
|
| 2363 |
|
| 2364 |
AVCodecParser mjpeg_parser = {
|
| 2365 |
{ CODEC_ID_MJPEG },
|
| 2366 |
sizeof(ParseContext),
|
| 2367 |
NULL,
|
| 2368 |
jpeg_parse, |
| 2369 |
ff_parse_close, |
| 2370 |
}; |
| 2371 |
|