2233 lines
66 KiB
C
2233 lines
66 KiB
C
/*
|
|
* MJPEG encoder and decoder
|
|
* Copyright (c) 2000, 2001 Fabrice Bellard.
|
|
*
|
|
* This library is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU Lesser General Public
|
|
* License as published by the Free Software Foundation; either
|
|
* version 2 of the License, or (at your option) any later version.
|
|
*
|
|
* This library is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
* Lesser General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU Lesser General Public
|
|
* License along with this library; if not, write to the Free Software
|
|
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
|
*
|
|
* Support for external huffman table, various fixes (AVID workaround),
|
|
* aspecting, new decode_frame mechanism and apple mjpeg-b support
|
|
* by Alex Beregszaszi <alex@naxine.org>
|
|
*/
|
|
|
|
/**
|
|
* @file mjpeg.c
|
|
* MJPEG encoder and decoder.
|
|
*/
|
|
|
|
//#define DEBUG
|
|
#include <assert.h>
|
|
|
|
#include "avcodec.h"
|
|
#include "dsputil.h"
|
|
#include "mpegvideo.h"
|
|
|
|
/* use two quantizer tables (one for luminance and one for chrominance) */
|
|
/* not yet working */
|
|
#undef TWOMATRIXES
|
|
|
|
typedef struct MJpegContext {
|
|
uint8_t huff_size_dc_luminance[12]; //FIXME use array [3] instead of lumi / chrom, for easier addressing
|
|
uint16_t huff_code_dc_luminance[12];
|
|
uint8_t huff_size_dc_chrominance[12];
|
|
uint16_t huff_code_dc_chrominance[12];
|
|
|
|
uint8_t huff_size_ac_luminance[256];
|
|
uint16_t huff_code_ac_luminance[256];
|
|
uint8_t huff_size_ac_chrominance[256];
|
|
uint16_t huff_code_ac_chrominance[256];
|
|
} MJpegContext;
|
|
|
|
/* JPEG marker codes */
|
|
typedef enum {
|
|
/* start of frame */
|
|
SOF0 = 0xc0, /* baseline */
|
|
SOF1 = 0xc1, /* extended sequential, huffman */
|
|
SOF2 = 0xc2, /* progressive, huffman */
|
|
SOF3 = 0xc3, /* lossless, huffman */
|
|
|
|
SOF5 = 0xc5, /* differential sequential, huffman */
|
|
SOF6 = 0xc6, /* differential progressive, huffman */
|
|
SOF7 = 0xc7, /* differential lossless, huffman */
|
|
JPG = 0xc8, /* reserved for JPEG extension */
|
|
SOF9 = 0xc9, /* extended sequential, arithmetic */
|
|
SOF10 = 0xca, /* progressive, arithmetic */
|
|
SOF11 = 0xcb, /* lossless, arithmetic */
|
|
|
|
SOF13 = 0xcd, /* differential sequential, arithmetic */
|
|
SOF14 = 0xce, /* differential progressive, arithmetic */
|
|
SOF15 = 0xcf, /* differential lossless, arithmetic */
|
|
|
|
DHT = 0xc4, /* define huffman tables */
|
|
|
|
DAC = 0xcc, /* define arithmetic-coding conditioning */
|
|
|
|
/* restart with modulo 8 count "m" */
|
|
RST0 = 0xd0,
|
|
RST1 = 0xd1,
|
|
RST2 = 0xd2,
|
|
RST3 = 0xd3,
|
|
RST4 = 0xd4,
|
|
RST5 = 0xd5,
|
|
RST6 = 0xd6,
|
|
RST7 = 0xd7,
|
|
|
|
SOI = 0xd8, /* start of image */
|
|
EOI = 0xd9, /* end of image */
|
|
SOS = 0xda, /* start of scan */
|
|
DQT = 0xdb, /* define quantization tables */
|
|
DNL = 0xdc, /* define number of lines */
|
|
DRI = 0xdd, /* define restart interval */
|
|
DHP = 0xde, /* define hierarchical progression */
|
|
EXP = 0xdf, /* expand reference components */
|
|
|
|
APP0 = 0xe0,
|
|
APP1 = 0xe1,
|
|
APP2 = 0xe2,
|
|
APP3 = 0xe3,
|
|
APP4 = 0xe4,
|
|
APP5 = 0xe5,
|
|
APP6 = 0xe6,
|
|
APP7 = 0xe7,
|
|
APP8 = 0xe8,
|
|
APP9 = 0xe9,
|
|
APP10 = 0xea,
|
|
APP11 = 0xeb,
|
|
APP12 = 0xec,
|
|
APP13 = 0xed,
|
|
APP14 = 0xee,
|
|
APP15 = 0xef,
|
|
|
|
JPG0 = 0xf0,
|
|
JPG1 = 0xf1,
|
|
JPG2 = 0xf2,
|
|
JPG3 = 0xf3,
|
|
JPG4 = 0xf4,
|
|
JPG5 = 0xf5,
|
|
JPG6 = 0xf6,
|
|
JPG7 = 0xf7,
|
|
JPG8 = 0xf8,
|
|
JPG9 = 0xf9,
|
|
JPG10 = 0xfa,
|
|
JPG11 = 0xfb,
|
|
JPG12 = 0xfc,
|
|
JPG13 = 0xfd,
|
|
|
|
COM = 0xfe, /* comment */
|
|
|
|
TEM = 0x01, /* temporary private use for arithmetic coding */
|
|
|
|
/* 0x02 -> 0xbf reserved */
|
|
} JPEG_MARKER;
|
|
|
|
#if 0
|
|
/* These are the sample quantization tables given in JPEG spec section K.1.
|
|
* The spec says that the values given produce "good" quality, and
|
|
* when divided by 2, "very good" quality.
|
|
*/
|
|
static const unsigned char std_luminance_quant_tbl[64] = {
|
|
16, 11, 10, 16, 24, 40, 51, 61,
|
|
12, 12, 14, 19, 26, 58, 60, 55,
|
|
14, 13, 16, 24, 40, 57, 69, 56,
|
|
14, 17, 22, 29, 51, 87, 80, 62,
|
|
18, 22, 37, 56, 68, 109, 103, 77,
|
|
24, 35, 55, 64, 81, 104, 113, 92,
|
|
49, 64, 78, 87, 103, 121, 120, 101,
|
|
72, 92, 95, 98, 112, 100, 103, 99
|
|
};
|
|
static const unsigned char std_chrominance_quant_tbl[64] = {
|
|
17, 18, 24, 47, 99, 99, 99, 99,
|
|
18, 21, 26, 66, 99, 99, 99, 99,
|
|
24, 26, 56, 99, 99, 99, 99, 99,
|
|
47, 66, 99, 99, 99, 99, 99, 99,
|
|
99, 99, 99, 99, 99, 99, 99, 99,
|
|
99, 99, 99, 99, 99, 99, 99, 99,
|
|
99, 99, 99, 99, 99, 99, 99, 99,
|
|
99, 99, 99, 99, 99, 99, 99, 99
|
|
};
|
|
#endif
|
|
|
|
/* Set up the standard Huffman tables (cf. JPEG standard section K.3) */
|
|
/* IMPORTANT: these are only valid for 8-bit data precision! */
|
|
static const uint8_t bits_dc_luminance[17] =
|
|
{ /* 0-base */ 0, 0, 1, 5, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0 };
|
|
static const uint8_t val_dc_luminance[] =
|
|
{ 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11 };
|
|
|
|
static const uint8_t bits_dc_chrominance[17] =
|
|
{ /* 0-base */ 0, 0, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0 };
|
|
static const uint8_t val_dc_chrominance[] =
|
|
{ 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11 };
|
|
|
|
static const uint8_t bits_ac_luminance[17] =
|
|
{ /* 0-base */ 0, 0, 2, 1, 3, 3, 2, 4, 3, 5, 5, 4, 4, 0, 0, 1, 0x7d };
|
|
static const uint8_t val_ac_luminance[] =
|
|
{ 0x01, 0x02, 0x03, 0x00, 0x04, 0x11, 0x05, 0x12,
|
|
0x21, 0x31, 0x41, 0x06, 0x13, 0x51, 0x61, 0x07,
|
|
0x22, 0x71, 0x14, 0x32, 0x81, 0x91, 0xa1, 0x08,
|
|
0x23, 0x42, 0xb1, 0xc1, 0x15, 0x52, 0xd1, 0xf0,
|
|
0x24, 0x33, 0x62, 0x72, 0x82, 0x09, 0x0a, 0x16,
|
|
0x17, 0x18, 0x19, 0x1a, 0x25, 0x26, 0x27, 0x28,
|
|
0x29, 0x2a, 0x34, 0x35, 0x36, 0x37, 0x38, 0x39,
|
|
0x3a, 0x43, 0x44, 0x45, 0x46, 0x47, 0x48, 0x49,
|
|
0x4a, 0x53, 0x54, 0x55, 0x56, 0x57, 0x58, 0x59,
|
|
0x5a, 0x63, 0x64, 0x65, 0x66, 0x67, 0x68, 0x69,
|
|
0x6a, 0x73, 0x74, 0x75, 0x76, 0x77, 0x78, 0x79,
|
|
0x7a, 0x83, 0x84, 0x85, 0x86, 0x87, 0x88, 0x89,
|
|
0x8a, 0x92, 0x93, 0x94, 0x95, 0x96, 0x97, 0x98,
|
|
0x99, 0x9a, 0xa2, 0xa3, 0xa4, 0xa5, 0xa6, 0xa7,
|
|
0xa8, 0xa9, 0xaa, 0xb2, 0xb3, 0xb4, 0xb5, 0xb6,
|
|
0xb7, 0xb8, 0xb9, 0xba, 0xc2, 0xc3, 0xc4, 0xc5,
|
|
0xc6, 0xc7, 0xc8, 0xc9, 0xca, 0xd2, 0xd3, 0xd4,
|
|
0xd5, 0xd6, 0xd7, 0xd8, 0xd9, 0xda, 0xe1, 0xe2,
|
|
0xe3, 0xe4, 0xe5, 0xe6, 0xe7, 0xe8, 0xe9, 0xea,
|
|
0xf1, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7, 0xf8,
|
|
0xf9, 0xfa
|
|
};
|
|
|
|
static const uint8_t bits_ac_chrominance[17] =
|
|
{ /* 0-base */ 0, 0, 2, 1, 2, 4, 4, 3, 4, 7, 5, 4, 4, 0, 1, 2, 0x77 };
|
|
|
|
static const uint8_t val_ac_chrominance[] =
|
|
{ 0x00, 0x01, 0x02, 0x03, 0x11, 0x04, 0x05, 0x21,
|
|
0x31, 0x06, 0x12, 0x41, 0x51, 0x07, 0x61, 0x71,
|
|
0x13, 0x22, 0x32, 0x81, 0x08, 0x14, 0x42, 0x91,
|
|
0xa1, 0xb1, 0xc1, 0x09, 0x23, 0x33, 0x52, 0xf0,
|
|
0x15, 0x62, 0x72, 0xd1, 0x0a, 0x16, 0x24, 0x34,
|
|
0xe1, 0x25, 0xf1, 0x17, 0x18, 0x19, 0x1a, 0x26,
|
|
0x27, 0x28, 0x29, 0x2a, 0x35, 0x36, 0x37, 0x38,
|
|
0x39, 0x3a, 0x43, 0x44, 0x45, 0x46, 0x47, 0x48,
|
|
0x49, 0x4a, 0x53, 0x54, 0x55, 0x56, 0x57, 0x58,
|
|
0x59, 0x5a, 0x63, 0x64, 0x65, 0x66, 0x67, 0x68,
|
|
0x69, 0x6a, 0x73, 0x74, 0x75, 0x76, 0x77, 0x78,
|
|
0x79, 0x7a, 0x82, 0x83, 0x84, 0x85, 0x86, 0x87,
|
|
0x88, 0x89, 0x8a, 0x92, 0x93, 0x94, 0x95, 0x96,
|
|
0x97, 0x98, 0x99, 0x9a, 0xa2, 0xa3, 0xa4, 0xa5,
|
|
0xa6, 0xa7, 0xa8, 0xa9, 0xaa, 0xb2, 0xb3, 0xb4,
|
|
0xb5, 0xb6, 0xb7, 0xb8, 0xb9, 0xba, 0xc2, 0xc3,
|
|
0xc4, 0xc5, 0xc6, 0xc7, 0xc8, 0xc9, 0xca, 0xd2,
|
|
0xd3, 0xd4, 0xd5, 0xd6, 0xd7, 0xd8, 0xd9, 0xda,
|
|
0xe2, 0xe3, 0xe4, 0xe5, 0xe6, 0xe7, 0xe8, 0xe9,
|
|
0xea, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7, 0xf8,
|
|
0xf9, 0xfa
|
|
};
|
|
|
|
/* isn't this function nicer than the one in the libjpeg ? */
|
|
static void build_huffman_codes(uint8_t *huff_size, uint16_t *huff_code,
|
|
const uint8_t *bits_table, const uint8_t *val_table)
|
|
{
|
|
int i, j, k,nb, code, sym;
|
|
|
|
code = 0;
|
|
k = 0;
|
|
for(i=1;i<=16;i++) {
|
|
nb = bits_table[i];
|
|
for(j=0;j<nb;j++) {
|
|
sym = val_table[k++];
|
|
huff_size[sym] = i;
|
|
huff_code[sym] = code;
|
|
code++;
|
|
}
|
|
code <<= 1;
|
|
}
|
|
}
|
|
|
|
#ifdef CONFIG_ENCODERS
|
|
int mjpeg_init(MpegEncContext *s)
|
|
{
|
|
MJpegContext *m;
|
|
|
|
m = av_malloc(sizeof(MJpegContext));
|
|
if (!m)
|
|
return -1;
|
|
|
|
s->min_qcoeff=-1023;
|
|
s->max_qcoeff= 1023;
|
|
|
|
/* build all the huffman tables */
|
|
build_huffman_codes(m->huff_size_dc_luminance,
|
|
m->huff_code_dc_luminance,
|
|
bits_dc_luminance,
|
|
val_dc_luminance);
|
|
build_huffman_codes(m->huff_size_dc_chrominance,
|
|
m->huff_code_dc_chrominance,
|
|
bits_dc_chrominance,
|
|
val_dc_chrominance);
|
|
build_huffman_codes(m->huff_size_ac_luminance,
|
|
m->huff_code_ac_luminance,
|
|
bits_ac_luminance,
|
|
val_ac_luminance);
|
|
build_huffman_codes(m->huff_size_ac_chrominance,
|
|
m->huff_code_ac_chrominance,
|
|
bits_ac_chrominance,
|
|
val_ac_chrominance);
|
|
|
|
s->mjpeg_ctx = m;
|
|
return 0;
|
|
}
|
|
|
|
void mjpeg_close(MpegEncContext *s)
|
|
{
|
|
av_free(s->mjpeg_ctx);
|
|
}
|
|
#endif //CONFIG_ENCODERS
|
|
|
|
#define PREDICT(ret, topleft, top, left, predictor)\
|
|
switch(predictor){\
|
|
case 1: ret= left; break;\
|
|
case 2: ret= top; break;\
|
|
case 3: ret= topleft; break;\
|
|
case 4: ret= left + top - topleft; break;\
|
|
case 5: ret= left + ((top - topleft)>>1); break;\
|
|
case 6: ret= top + ((left - topleft)>>1); break;\
|
|
default:\
|
|
case 7: ret= (left + top)>>1; break;\
|
|
}
|
|
|
|
#ifdef CONFIG_ENCODERS
|
|
static inline void put_marker(PutBitContext *p, int code)
|
|
{
|
|
put_bits(p, 8, 0xff);
|
|
put_bits(p, 8, code);
|
|
}
|
|
|
|
/* table_class: 0 = DC coef, 1 = AC coefs */
|
|
static int put_huffman_table(MpegEncContext *s, int table_class, int table_id,
|
|
const uint8_t *bits_table, const uint8_t *value_table)
|
|
{
|
|
PutBitContext *p = &s->pb;
|
|
int n, i;
|
|
|
|
put_bits(p, 4, table_class);
|
|
put_bits(p, 4, table_id);
|
|
|
|
n = 0;
|
|
for(i=1;i<=16;i++) {
|
|
n += bits_table[i];
|
|
put_bits(p, 8, bits_table[i]);
|
|
}
|
|
|
|
for(i=0;i<n;i++)
|
|
put_bits(p, 8, value_table[i]);
|
|
|
|
return n + 17;
|
|
}
|
|
|
|
static void jpeg_table_header(MpegEncContext *s)
|
|
{
|
|
PutBitContext *p = &s->pb;
|
|
int i, j, size;
|
|
uint8_t *ptr;
|
|
|
|
/* quant matrixes */
|
|
put_marker(p, DQT);
|
|
#ifdef TWOMATRIXES
|
|
put_bits(p, 16, 2 + 2 * (1 + 64));
|
|
#else
|
|
put_bits(p, 16, 2 + 1 * (1 + 64));
|
|
#endif
|
|
put_bits(p, 4, 0); /* 8 bit precision */
|
|
put_bits(p, 4, 0); /* table 0 */
|
|
for(i=0;i<64;i++) {
|
|
j = s->intra_scantable.permutated[i];
|
|
put_bits(p, 8, s->intra_matrix[j]);
|
|
}
|
|
#ifdef TWOMATRIXES
|
|
put_bits(p, 4, 0); /* 8 bit precision */
|
|
put_bits(p, 4, 1); /* table 1 */
|
|
for(i=0;i<64;i++) {
|
|
j = s->intra_scantable.permutated[i];
|
|
put_bits(p, 8, s->chroma_intra_matrix[j]);
|
|
}
|
|
#endif
|
|
|
|
/* huffman table */
|
|
put_marker(p, DHT);
|
|
flush_put_bits(p);
|
|
ptr = pbBufPtr(p);
|
|
put_bits(p, 16, 0); /* patched later */
|
|
size = 2;
|
|
size += put_huffman_table(s, 0, 0, bits_dc_luminance, val_dc_luminance);
|
|
size += put_huffman_table(s, 0, 1, bits_dc_chrominance, val_dc_chrominance);
|
|
|
|
size += put_huffman_table(s, 1, 0, bits_ac_luminance, val_ac_luminance);
|
|
size += put_huffman_table(s, 1, 1, bits_ac_chrominance, val_ac_chrominance);
|
|
ptr[0] = size >> 8;
|
|
ptr[1] = size;
|
|
}
|
|
|
|
static void jpeg_put_comments(MpegEncContext *s)
|
|
{
|
|
PutBitContext *p = &s->pb;
|
|
int size;
|
|
uint8_t *ptr;
|
|
|
|
if (s->aspect_ratio_info /* && !lossless */)
|
|
{
|
|
/* JFIF header */
|
|
put_marker(p, APP0);
|
|
put_bits(p, 16, 16);
|
|
put_string(p, "JFIF", 1); /* this puts the trailing zero-byte too */
|
|
put_bits(p, 16, 0x0201); /* v 1.02 */
|
|
put_bits(p, 8, 0); /* units type: 0 - aspect ratio */
|
|
put_bits(p, 16, s->avctx->sample_aspect_ratio.num);
|
|
put_bits(p, 16, s->avctx->sample_aspect_ratio.den);
|
|
put_bits(p, 8, 0); /* thumbnail width */
|
|
put_bits(p, 8, 0); /* thumbnail height */
|
|
}
|
|
|
|
/* comment */
|
|
if(!(s->flags & CODEC_FLAG_BITEXACT)){
|
|
put_marker(p, COM);
|
|
flush_put_bits(p);
|
|
ptr = pbBufPtr(p);
|
|
put_bits(p, 16, 0); /* patched later */
|
|
put_string(p, LIBAVCODEC_IDENT, 1);
|
|
size = strlen(LIBAVCODEC_IDENT)+3;
|
|
ptr[0] = size >> 8;
|
|
ptr[1] = size;
|
|
}
|
|
}
|
|
|
|
void mjpeg_picture_header(MpegEncContext *s)
|
|
{
|
|
const int lossless= s->avctx->codec_id == CODEC_ID_LJPEG;
|
|
|
|
put_marker(&s->pb, SOI);
|
|
|
|
if (!s->mjpeg_data_only_frames)
|
|
{
|
|
jpeg_put_comments(s);
|
|
|
|
if (s->mjpeg_write_tables) jpeg_table_header(s);
|
|
|
|
put_marker(&s->pb, lossless ? SOF3 : SOF0);
|
|
|
|
put_bits(&s->pb, 16, 17);
|
|
if(lossless && s->avctx->pix_fmt == PIX_FMT_RGBA32)
|
|
put_bits(&s->pb, 8, 9); /* 9 bits/component RCT */
|
|
else
|
|
put_bits(&s->pb, 8, 8); /* 8 bits/component */
|
|
put_bits(&s->pb, 16, s->height);
|
|
put_bits(&s->pb, 16, s->width);
|
|
put_bits(&s->pb, 8, 3); /* 3 components */
|
|
|
|
/* Y component */
|
|
put_bits(&s->pb, 8, 1); /* component number */
|
|
put_bits(&s->pb, 4, s->mjpeg_hsample[0]); /* H factor */
|
|
put_bits(&s->pb, 4, s->mjpeg_vsample[0]); /* V factor */
|
|
put_bits(&s->pb, 8, 0); /* select matrix */
|
|
|
|
/* Cb component */
|
|
put_bits(&s->pb, 8, 2); /* component number */
|
|
put_bits(&s->pb, 4, s->mjpeg_hsample[1]); /* H factor */
|
|
put_bits(&s->pb, 4, s->mjpeg_vsample[1]); /* V factor */
|
|
#ifdef TWOMATRIXES
|
|
put_bits(&s->pb, 8, lossless ? 0 : 1); /* select matrix */
|
|
#else
|
|
put_bits(&s->pb, 8, 0); /* select matrix */
|
|
#endif
|
|
|
|
/* Cr component */
|
|
put_bits(&s->pb, 8, 3); /* component number */
|
|
put_bits(&s->pb, 4, s->mjpeg_hsample[2]); /* H factor */
|
|
put_bits(&s->pb, 4, s->mjpeg_vsample[2]); /* V factor */
|
|
#ifdef TWOMATRIXES
|
|
put_bits(&s->pb, 8, lossless ? 0 : 1); /* select matrix */
|
|
#else
|
|
put_bits(&s->pb, 8, 0); /* select matrix */
|
|
#endif
|
|
}
|
|
|
|
/* scan header */
|
|
put_marker(&s->pb, SOS);
|
|
put_bits(&s->pb, 16, 12); /* length */
|
|
put_bits(&s->pb, 8, 3); /* 3 components */
|
|
|
|
/* Y component */
|
|
put_bits(&s->pb, 8, 1); /* index */
|
|
put_bits(&s->pb, 4, 0); /* DC huffman table index */
|
|
put_bits(&s->pb, 4, 0); /* AC huffman table index */
|
|
|
|
/* Cb component */
|
|
put_bits(&s->pb, 8, 2); /* index */
|
|
put_bits(&s->pb, 4, 1); /* DC huffman table index */
|
|
put_bits(&s->pb, 4, lossless ? 0 : 1); /* AC huffman table index */
|
|
|
|
/* Cr component */
|
|
put_bits(&s->pb, 8, 3); /* index */
|
|
put_bits(&s->pb, 4, 1); /* DC huffman table index */
|
|
put_bits(&s->pb, 4, lossless ? 0 : 1); /* AC huffman table index */
|
|
|
|
put_bits(&s->pb, 8, lossless ? s->avctx->prediction_method+1 : 0); /* Ss (not used) */
|
|
put_bits(&s->pb, 8, lossless ? 0 : 63); /* Se (not used) */
|
|
put_bits(&s->pb, 8, 0); /* Ah/Al (not used) */
|
|
}
|
|
|
|
static void escape_FF(MpegEncContext *s, int start)
|
|
{
|
|
int size= put_bits_count(&s->pb) - start*8;
|
|
int i, ff_count;
|
|
uint8_t *buf= s->pb.buf + start;
|
|
int align= (-(size_t)(buf))&3;
|
|
|
|
assert((size&7) == 0);
|
|
size >>= 3;
|
|
|
|
ff_count=0;
|
|
for(i=0; i<size && i<align; i++){
|
|
if(buf[i]==0xFF) ff_count++;
|
|
}
|
|
for(; i<size-15; i+=16){
|
|
int acc, v;
|
|
|
|
v= *(uint32_t*)(&buf[i]);
|
|
acc= (((v & (v>>4))&0x0F0F0F0F)+0x01010101)&0x10101010;
|
|
v= *(uint32_t*)(&buf[i+4]);
|
|
acc+=(((v & (v>>4))&0x0F0F0F0F)+0x01010101)&0x10101010;
|
|
v= *(uint32_t*)(&buf[i+8]);
|
|
acc+=(((v & (v>>4))&0x0F0F0F0F)+0x01010101)&0x10101010;
|
|
v= *(uint32_t*)(&buf[i+12]);
|
|
acc+=(((v & (v>>4))&0x0F0F0F0F)+0x01010101)&0x10101010;
|
|
|
|
acc>>=4;
|
|
acc+= (acc>>16);
|
|
acc+= (acc>>8);
|
|
ff_count+= acc&0xFF;
|
|
}
|
|
for(; i<size; i++){
|
|
if(buf[i]==0xFF) ff_count++;
|
|
}
|
|
|
|
if(ff_count==0) return;
|
|
|
|
/* skip put bits */
|
|
for(i=0; i<ff_count-3; i+=4)
|
|
put_bits(&s->pb, 32, 0);
|
|
put_bits(&s->pb, (ff_count-i)*8, 0);
|
|
flush_put_bits(&s->pb);
|
|
|
|
for(i=size-1; ff_count; i--){
|
|
int v= buf[i];
|
|
|
|
if(v==0xFF){
|
|
//printf("%d %d\n", i, ff_count);
|
|
buf[i+ff_count]= 0;
|
|
ff_count--;
|
|
}
|
|
|
|
buf[i+ff_count]= v;
|
|
}
|
|
}
|
|
|
|
void ff_mjpeg_stuffing(PutBitContext * pbc)
|
|
{
|
|
int length;
|
|
length= (-put_bits_count(pbc))&7;
|
|
if(length) put_bits(pbc, length, (1<<length)-1);
|
|
}
|
|
|
|
void mjpeg_picture_trailer(MpegEncContext *s)
|
|
{
|
|
ff_mjpeg_stuffing(&s->pb);
|
|
flush_put_bits(&s->pb);
|
|
|
|
assert((s->header_bits&7)==0);
|
|
|
|
escape_FF(s, s->header_bits>>3);
|
|
|
|
put_marker(&s->pb, EOI);
|
|
}
|
|
|
|
static inline void mjpeg_encode_dc(MpegEncContext *s, int val,
|
|
uint8_t *huff_size, uint16_t *huff_code)
|
|
{
|
|
int mant, nbits;
|
|
|
|
if (val == 0) {
|
|
put_bits(&s->pb, huff_size[0], huff_code[0]);
|
|
} else {
|
|
mant = val;
|
|
if (val < 0) {
|
|
val = -val;
|
|
mant--;
|
|
}
|
|
|
|
nbits= av_log2_16bit(val) + 1;
|
|
|
|
put_bits(&s->pb, huff_size[nbits], huff_code[nbits]);
|
|
|
|
put_bits(&s->pb, nbits, mant & ((1 << nbits) - 1));
|
|
}
|
|
}
|
|
|
|
static void encode_block(MpegEncContext *s, DCTELEM *block, int n)
|
|
{
|
|
int mant, nbits, code, i, j;
|
|
int component, dc, run, last_index, val;
|
|
MJpegContext *m = s->mjpeg_ctx;
|
|
uint8_t *huff_size_ac;
|
|
uint16_t *huff_code_ac;
|
|
|
|
/* DC coef */
|
|
component = (n <= 3 ? 0 : n - 4 + 1);
|
|
dc = block[0]; /* overflow is impossible */
|
|
val = dc - s->last_dc[component];
|
|
if (n < 4) {
|
|
mjpeg_encode_dc(s, val, m->huff_size_dc_luminance, m->huff_code_dc_luminance);
|
|
huff_size_ac = m->huff_size_ac_luminance;
|
|
huff_code_ac = m->huff_code_ac_luminance;
|
|
} else {
|
|
mjpeg_encode_dc(s, val, m->huff_size_dc_chrominance, m->huff_code_dc_chrominance);
|
|
huff_size_ac = m->huff_size_ac_chrominance;
|
|
huff_code_ac = m->huff_code_ac_chrominance;
|
|
}
|
|
s->last_dc[component] = dc;
|
|
|
|
/* AC coefs */
|
|
|
|
run = 0;
|
|
last_index = s->block_last_index[n];
|
|
for(i=1;i<=last_index;i++) {
|
|
j = s->intra_scantable.permutated[i];
|
|
val = block[j];
|
|
if (val == 0) {
|
|
run++;
|
|
} else {
|
|
while (run >= 16) {
|
|
put_bits(&s->pb, huff_size_ac[0xf0], huff_code_ac[0xf0]);
|
|
run -= 16;
|
|
}
|
|
mant = val;
|
|
if (val < 0) {
|
|
val = -val;
|
|
mant--;
|
|
}
|
|
|
|
nbits= av_log2(val) + 1;
|
|
code = (run << 4) | nbits;
|
|
|
|
put_bits(&s->pb, huff_size_ac[code], huff_code_ac[code]);
|
|
|
|
put_bits(&s->pb, nbits, mant & ((1 << nbits) - 1));
|
|
run = 0;
|
|
}
|
|
}
|
|
|
|
/* output EOB only if not already 64 values */
|
|
if (last_index < 63 || run != 0)
|
|
put_bits(&s->pb, huff_size_ac[0], huff_code_ac[0]);
|
|
}
|
|
|
|
void mjpeg_encode_mb(MpegEncContext *s,
|
|
DCTELEM block[6][64])
|
|
{
|
|
int i;
|
|
for(i=0;i<6;i++) {
|
|
encode_block(s, block[i], i);
|
|
}
|
|
}
|
|
|
|
static int encode_picture_lossless(AVCodecContext *avctx, unsigned char *buf, int buf_size, void *data){
|
|
MpegEncContext * const s = avctx->priv_data;
|
|
MJpegContext * const m = s->mjpeg_ctx;
|
|
AVFrame *pict = data;
|
|
const int width= s->width;
|
|
const int height= s->height;
|
|
AVFrame * const p= (AVFrame*)&s->current_picture;
|
|
const int predictor= avctx->prediction_method+1;
|
|
|
|
init_put_bits(&s->pb, buf, buf_size);
|
|
|
|
*p = *pict;
|
|
p->pict_type= FF_I_TYPE;
|
|
p->key_frame= 1;
|
|
|
|
mjpeg_picture_header(s);
|
|
|
|
s->header_bits= put_bits_count(&s->pb);
|
|
|
|
if(avctx->pix_fmt == PIX_FMT_RGBA32){
|
|
int x, y, i;
|
|
const int linesize= p->linesize[0];
|
|
uint16_t buffer[2048][4];
|
|
int left[3], top[3], topleft[3];
|
|
|
|
for(i=0; i<3; i++){
|
|
buffer[0][i]= 1 << (9 - 1);
|
|
}
|
|
|
|
for(y = 0; y < height; y++) {
|
|
const int modified_predictor= y ? predictor : 1;
|
|
uint8_t *ptr = p->data[0] + (linesize * y);
|
|
|
|
for(i=0; i<3; i++){
|
|
top[i]= left[i]= topleft[i]= buffer[0][i];
|
|
}
|
|
for(x = 0; x < width; x++) {
|
|
buffer[x][1] = ptr[4*x+0] - ptr[4*x+1] + 0x100;
|
|
buffer[x][2] = ptr[4*x+2] - ptr[4*x+1] + 0x100;
|
|
buffer[x][0] = (ptr[4*x+0] + 2*ptr[4*x+1] + ptr[4*x+2])>>2;
|
|
|
|
for(i=0;i<3;i++) {
|
|
int pred, diff;
|
|
|
|
PREDICT(pred, topleft[i], top[i], left[i], modified_predictor);
|
|
|
|
topleft[i]= top[i];
|
|
top[i]= buffer[x+1][i];
|
|
|
|
left[i]= buffer[x][i];
|
|
|
|
diff= ((left[i] - pred + 0x100)&0x1FF) - 0x100;
|
|
|
|
if(i==0)
|
|
mjpeg_encode_dc(s, diff, m->huff_size_dc_luminance, m->huff_code_dc_luminance); //FIXME ugly
|
|
else
|
|
mjpeg_encode_dc(s, diff, m->huff_size_dc_chrominance, m->huff_code_dc_chrominance);
|
|
}
|
|
}
|
|
}
|
|
}else{
|
|
int mb_x, mb_y, i;
|
|
const int mb_width = (width + s->mjpeg_hsample[0] - 1) / s->mjpeg_hsample[0];
|
|
const int mb_height = (height + s->mjpeg_vsample[0] - 1) / s->mjpeg_vsample[0];
|
|
|
|
for(mb_y = 0; mb_y < mb_height; mb_y++) {
|
|
for(mb_x = 0; mb_x < mb_width; mb_x++) {
|
|
if(mb_x==0 || mb_y==0){
|
|
for(i=0;i<3;i++) {
|
|
uint8_t *ptr;
|
|
int x, y, h, v, linesize;
|
|
h = s->mjpeg_hsample[i];
|
|
v = s->mjpeg_vsample[i];
|
|
linesize= p->linesize[i];
|
|
|
|
for(y=0; y<v; y++){
|
|
for(x=0; x<h; x++){
|
|
int pred;
|
|
|
|
ptr = p->data[i] + (linesize * (v * mb_y + y)) + (h * mb_x + x); //FIXME optimize this crap
|
|
if(y==0 && mb_y==0){
|
|
if(x==0 && mb_x==0){
|
|
pred= 128;
|
|
}else{
|
|
pred= ptr[-1];
|
|
}
|
|
}else{
|
|
if(x==0 && mb_x==0){
|
|
pred= ptr[-linesize];
|
|
}else{
|
|
PREDICT(pred, ptr[-linesize-1], ptr[-linesize], ptr[-1], predictor);
|
|
}
|
|
}
|
|
|
|
if(i==0)
|
|
mjpeg_encode_dc(s, (int8_t)(*ptr - pred), m->huff_size_dc_luminance, m->huff_code_dc_luminance); //FIXME ugly
|
|
else
|
|
mjpeg_encode_dc(s, (int8_t)(*ptr - pred), m->huff_size_dc_chrominance, m->huff_code_dc_chrominance);
|
|
}
|
|
}
|
|
}
|
|
}else{
|
|
for(i=0;i<3;i++) {
|
|
uint8_t *ptr;
|
|
int x, y, h, v, linesize;
|
|
h = s->mjpeg_hsample[i];
|
|
v = s->mjpeg_vsample[i];
|
|
linesize= p->linesize[i];
|
|
|
|
for(y=0; y<v; y++){
|
|
for(x=0; x<h; x++){
|
|
int pred;
|
|
|
|
ptr = p->data[i] + (linesize * (v * mb_y + y)) + (h * mb_x + x); //FIXME optimize this crap
|
|
//printf("%d %d %d %d %8X\n", mb_x, mb_y, x, y, ptr);
|
|
PREDICT(pred, ptr[-linesize-1], ptr[-linesize], ptr[-1], predictor);
|
|
|
|
if(i==0)
|
|
mjpeg_encode_dc(s, (int8_t)(*ptr - pred), m->huff_size_dc_luminance, m->huff_code_dc_luminance); //FIXME ugly
|
|
else
|
|
mjpeg_encode_dc(s, (int8_t)(*ptr - pred), m->huff_size_dc_chrominance, m->huff_code_dc_chrominance);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
emms_c();
|
|
|
|
mjpeg_picture_trailer(s);
|
|
s->picture_number++;
|
|
|
|
flush_put_bits(&s->pb);
|
|
return pbBufPtr(&s->pb) - s->pb.buf;
|
|
// return (put_bits_count(&f->pb)+7)/8;
|
|
}
|
|
|
|
#endif //CONFIG_ENCODERS
|
|
|
|
/******************************************/
|
|
/* decoding */
|
|
|
|
#define MAX_COMPONENTS 4
|
|
|
|
typedef struct MJpegDecodeContext {
|
|
AVCodecContext *avctx;
|
|
GetBitContext gb;
|
|
int mpeg_enc_ctx_allocated; /* true if decoding context allocated */
|
|
|
|
int start_code; /* current start code */
|
|
int buffer_size;
|
|
uint8_t *buffer;
|
|
|
|
int16_t quant_matrixes[4][64];
|
|
VLC vlcs[2][4];
|
|
int qscale[4]; ///< quantizer scale calculated from quant_matrixes
|
|
|
|
int org_height; /* size given at codec init */
|
|
int first_picture; /* true if decoding first picture */
|
|
int interlaced; /* true if interlaced */
|
|
int bottom_field; /* true if bottom field */
|
|
int lossless;
|
|
int rgb;
|
|
int rct; /* standard rct */
|
|
int pegasus_rct; /* pegasus reversible colorspace transform */
|
|
int bits; /* bits per component */
|
|
|
|
int width, height;
|
|
int mb_width, mb_height;
|
|
int nb_components;
|
|
int component_id[MAX_COMPONENTS];
|
|
int h_count[MAX_COMPONENTS]; /* horizontal and vertical count for each component */
|
|
int v_count[MAX_COMPONENTS];
|
|
int comp_index[MAX_COMPONENTS];
|
|
int dc_index[MAX_COMPONENTS];
|
|
int ac_index[MAX_COMPONENTS];
|
|
int nb_blocks[MAX_COMPONENTS];
|
|
int h_scount[MAX_COMPONENTS];
|
|
int v_scount[MAX_COMPONENTS];
|
|
int h_max, v_max; /* maximum h and v counts */
|
|
int quant_index[4]; /* quant table index for each component */
|
|
int last_dc[MAX_COMPONENTS]; /* last DEQUANTIZED dc (XXX: am I right to do that ?) */
|
|
AVFrame picture; /* picture structure */
|
|
int linesize[MAX_COMPONENTS]; ///< linesize << interlaced
|
|
uint8_t *qscale_table;
|
|
DCTELEM block[64] __align8;
|
|
ScanTable scantable;
|
|
void (*idct_put)(uint8_t *dest/*align 8*/, int line_size, DCTELEM *block/*align 16*/);
|
|
|
|
int restart_interval;
|
|
int restart_count;
|
|
|
|
int buggy_avid;
|
|
int interlace_polarity;
|
|
} MJpegDecodeContext;
|
|
|
|
static int mjpeg_decode_dht(MJpegDecodeContext *s);
|
|
|
|
static int build_vlc(VLC *vlc, const uint8_t *bits_table, const uint8_t *val_table,
|
|
int nb_codes)
|
|
{
|
|
uint8_t huff_size[256];
|
|
uint16_t huff_code[256];
|
|
|
|
memset(huff_size, 0, sizeof(huff_size));
|
|
build_huffman_codes(huff_size, huff_code, bits_table, val_table);
|
|
|
|
return init_vlc(vlc, 9, nb_codes, huff_size, 1, 1, huff_code, 2, 2);
|
|
}
|
|
|
|
static int mjpeg_decode_init(AVCodecContext *avctx)
|
|
{
|
|
MJpegDecodeContext *s = avctx->priv_data;
|
|
MpegEncContext s2;
|
|
|
|
s->avctx = avctx;
|
|
|
|
/* ugly way to get the idct & scantable FIXME */
|
|
memset(&s2, 0, sizeof(MpegEncContext));
|
|
s2.avctx= avctx;
|
|
// s2->out_format = FMT_MJPEG;
|
|
dsputil_init(&s2.dsp, avctx);
|
|
DCT_common_init(&s2);
|
|
|
|
s->scantable= s2.intra_scantable;
|
|
s->idct_put= s2.dsp.idct_put;
|
|
|
|
s->mpeg_enc_ctx_allocated = 0;
|
|
s->buffer_size = 102400; /* smaller buffer should be enough,
|
|
but photojpg files could ahive bigger sizes */
|
|
s->buffer = av_malloc(s->buffer_size);
|
|
if (!s->buffer)
|
|
return -1;
|
|
s->start_code = -1;
|
|
s->first_picture = 1;
|
|
s->org_height = avctx->height;
|
|
|
|
build_vlc(&s->vlcs[0][0], bits_dc_luminance, val_dc_luminance, 12);
|
|
build_vlc(&s->vlcs[0][1], bits_dc_chrominance, val_dc_chrominance, 12);
|
|
build_vlc(&s->vlcs[1][0], bits_ac_luminance, val_ac_luminance, 251);
|
|
build_vlc(&s->vlcs[1][1], bits_ac_chrominance, val_ac_chrominance, 251);
|
|
|
|
if (avctx->flags & CODEC_FLAG_EXTERN_HUFF)
|
|
{
|
|
av_log(avctx, AV_LOG_INFO, "mjpeg: using external huffman table\n");
|
|
init_get_bits(&s->gb, avctx->extradata, avctx->extradata_size*8);
|
|
mjpeg_decode_dht(s);
|
|
/* should check for error - but dunno */
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* quantize tables */
|
|
static int mjpeg_decode_dqt(MJpegDecodeContext *s)
|
|
{
|
|
int len, index, i, j;
|
|
|
|
len = get_bits(&s->gb, 16) - 2;
|
|
|
|
while (len >= 65) {
|
|
/* only 8 bit precision handled */
|
|
if (get_bits(&s->gb, 4) != 0)
|
|
{
|
|
dprintf("dqt: 16bit precision\n");
|
|
return -1;
|
|
}
|
|
index = get_bits(&s->gb, 4);
|
|
if (index >= 4)
|
|
return -1;
|
|
dprintf("index=%d\n", index);
|
|
/* read quant table */
|
|
for(i=0;i<64;i++) {
|
|
j = s->scantable.permutated[i];
|
|
s->quant_matrixes[index][j] = get_bits(&s->gb, 8);
|
|
}
|
|
|
|
//XXX FIXME finetune, and perhaps add dc too
|
|
s->qscale[index]= FFMAX(
|
|
s->quant_matrixes[index][s->scantable.permutated[1]],
|
|
s->quant_matrixes[index][s->scantable.permutated[8]]) >> 1;
|
|
dprintf("qscale[%d]: %d\n", index, s->qscale[index]);
|
|
len -= 65;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* decode huffman tables and build VLC decoders */
|
|
static int mjpeg_decode_dht(MJpegDecodeContext *s)
|
|
{
|
|
int len, index, i, class, n, v, code_max;
|
|
uint8_t bits_table[17];
|
|
uint8_t val_table[256];
|
|
|
|
len = get_bits(&s->gb, 16) - 2;
|
|
|
|
while (len > 0) {
|
|
if (len < 17)
|
|
return -1;
|
|
class = get_bits(&s->gb, 4);
|
|
if (class >= 2)
|
|
return -1;
|
|
index = get_bits(&s->gb, 4);
|
|
if (index >= 4)
|
|
return -1;
|
|
n = 0;
|
|
for(i=1;i<=16;i++) {
|
|
bits_table[i] = get_bits(&s->gb, 8);
|
|
n += bits_table[i];
|
|
}
|
|
len -= 17;
|
|
if (len < n || n > 256)
|
|
return -1;
|
|
|
|
code_max = 0;
|
|
for(i=0;i<n;i++) {
|
|
v = get_bits(&s->gb, 8);
|
|
if (v > code_max)
|
|
code_max = v;
|
|
val_table[i] = v;
|
|
}
|
|
len -= n;
|
|
|
|
/* build VLC and flush previous vlc if present */
|
|
free_vlc(&s->vlcs[class][index]);
|
|
dprintf("class=%d index=%d nb_codes=%d\n",
|
|
class, index, code_max + 1);
|
|
if(build_vlc(&s->vlcs[class][index], bits_table, val_table, code_max + 1) < 0){
|
|
return -1;
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int mjpeg_decode_sof(MJpegDecodeContext *s)
|
|
{
|
|
int len, nb_components, i, width, height;
|
|
|
|
/* XXX: verify len field validity */
|
|
len = get_bits(&s->gb, 16);
|
|
s->bits= get_bits(&s->gb, 8);
|
|
|
|
if(s->pegasus_rct) s->bits=9;
|
|
if(s->bits==9 && !s->pegasus_rct) s->rct=1; //FIXME ugly
|
|
|
|
if (s->bits != 8 && !s->lossless){
|
|
av_log(s->avctx, AV_LOG_ERROR, "only 8 bits/component accepted\n");
|
|
return -1;
|
|
}
|
|
height = get_bits(&s->gb, 16);
|
|
width = get_bits(&s->gb, 16);
|
|
dprintf("sof0: picture: %dx%d\n", width, height);
|
|
|
|
nb_components = get_bits(&s->gb, 8);
|
|
if (nb_components <= 0 ||
|
|
nb_components > MAX_COMPONENTS)
|
|
return -1;
|
|
s->nb_components = nb_components;
|
|
s->h_max = 1;
|
|
s->v_max = 1;
|
|
for(i=0;i<nb_components;i++) {
|
|
/* component id */
|
|
s->component_id[i] = get_bits(&s->gb, 8) - 1;
|
|
s->h_count[i] = get_bits(&s->gb, 4);
|
|
s->v_count[i] = get_bits(&s->gb, 4);
|
|
/* compute hmax and vmax (only used in interleaved case) */
|
|
if (s->h_count[i] > s->h_max)
|
|
s->h_max = s->h_count[i];
|
|
if (s->v_count[i] > s->v_max)
|
|
s->v_max = s->v_count[i];
|
|
s->quant_index[i] = get_bits(&s->gb, 8);
|
|
if (s->quant_index[i] >= 4)
|
|
return -1;
|
|
dprintf("component %d %d:%d id: %d quant:%d\n", i, s->h_count[i],
|
|
s->v_count[i], s->component_id[i], s->quant_index[i]);
|
|
}
|
|
|
|
if(s->v_max==1 && s->h_max==1 && s->lossless==1) s->rgb=1;
|
|
|
|
/* if different size, realloc/alloc picture */
|
|
/* XXX: also check h_count and v_count */
|
|
if (width != s->width || height != s->height) {
|
|
av_freep(&s->qscale_table);
|
|
|
|
s->width = width;
|
|
s->height = height;
|
|
s->avctx->width = s->width;
|
|
s->avctx->height = s->height;
|
|
|
|
/* test interlaced mode */
|
|
if (s->first_picture &&
|
|
s->org_height != 0 &&
|
|
s->height < ((s->org_height * 3) / 4)) {
|
|
s->interlaced = 1;
|
|
// s->bottom_field = (s->interlace_polarity) ? 1 : 0;
|
|
s->bottom_field = 0;
|
|
s->avctx->height *= 2;
|
|
}
|
|
|
|
s->qscale_table= av_mallocz((s->width+15)/16);
|
|
|
|
s->first_picture = 0;
|
|
}
|
|
|
|
if(s->interlaced && s->bottom_field)
|
|
return 0;
|
|
|
|
/* XXX: not complete test ! */
|
|
switch((s->h_count[0] << 4) | s->v_count[0]) {
|
|
case 0x11:
|
|
if(s->rgb){
|
|
s->avctx->pix_fmt = PIX_FMT_RGBA32;
|
|
}else if(s->nb_components==3)
|
|
s->avctx->pix_fmt = PIX_FMT_YUV444P;
|
|
else
|
|
s->avctx->pix_fmt = PIX_FMT_GRAY8;
|
|
break;
|
|
case 0x21:
|
|
s->avctx->pix_fmt = PIX_FMT_YUV422P;
|
|
break;
|
|
default:
|
|
case 0x22:
|
|
s->avctx->pix_fmt = PIX_FMT_YUV420P;
|
|
break;
|
|
}
|
|
|
|
if(s->picture.data[0])
|
|
s->avctx->release_buffer(s->avctx, &s->picture);
|
|
|
|
s->picture.reference= 0;
|
|
if(s->avctx->get_buffer(s->avctx, &s->picture) < 0){
|
|
av_log(s->avctx, AV_LOG_ERROR, "get_buffer() failed\n");
|
|
return -1;
|
|
}
|
|
s->picture.pict_type= I_TYPE;
|
|
s->picture.key_frame= 1;
|
|
|
|
for(i=0; i<3; i++){
|
|
s->linesize[i]= s->picture.linesize[i] << s->interlaced;
|
|
}
|
|
|
|
// printf("%d %d %d %d %d %d\n", s->width, s->height, s->linesize[0], s->linesize[1], s->interlaced, s->avctx->height);
|
|
|
|
if (len != (8+(3*nb_components)))
|
|
{
|
|
dprintf("decode_sof0: error, len(%d) mismatch\n", len);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static inline int mjpeg_decode_dc(MJpegDecodeContext *s, int dc_index)
|
|
{
|
|
int code;
|
|
code = get_vlc2(&s->gb, s->vlcs[0][dc_index].table, 9, 2);
|
|
if (code < 0)
|
|
{
|
|
dprintf("mjpeg_decode_dc: bad vlc: %d:%d (%p)\n", 0, dc_index,
|
|
&s->vlcs[0][dc_index]);
|
|
return 0xffff;
|
|
}
|
|
|
|
if(code)
|
|
return get_xbits(&s->gb, code);
|
|
else
|
|
return 0;
|
|
}
|
|
|
|
/* decode block and dequantize */
|
|
static int decode_block(MJpegDecodeContext *s, DCTELEM *block,
|
|
int component, int dc_index, int ac_index, int quant_index)
|
|
{
|
|
int code, i, j, level, val;
|
|
VLC *ac_vlc;
|
|
int16_t *quant_matrix;
|
|
|
|
/* DC coef */
|
|
val = mjpeg_decode_dc(s, dc_index);
|
|
if (val == 0xffff) {
|
|
dprintf("error dc\n");
|
|
return -1;
|
|
}
|
|
quant_matrix = s->quant_matrixes[quant_index];
|
|
val = val * quant_matrix[0] + s->last_dc[component];
|
|
s->last_dc[component] = val;
|
|
block[0] = val;
|
|
/* AC coefs */
|
|
ac_vlc = &s->vlcs[1][ac_index];
|
|
i = 1;
|
|
for(;;) {
|
|
code = get_vlc2(&s->gb, s->vlcs[1][ac_index].table, 9, 2);
|
|
|
|
if (code < 0) {
|
|
dprintf("error ac\n");
|
|
return -1;
|
|
}
|
|
/* EOB */
|
|
if (code == 0)
|
|
break;
|
|
if (code == 0xf0) {
|
|
i += 16;
|
|
} else {
|
|
level = get_xbits(&s->gb, code & 0xf);
|
|
i += code >> 4;
|
|
if (i >= 64) {
|
|
dprintf("error count: %d\n", i);
|
|
return -1;
|
|
}
|
|
j = s->scantable.permutated[i];
|
|
block[j] = level * quant_matrix[j];
|
|
i++;
|
|
if (i >= 64)
|
|
break;
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int ljpeg_decode_rgb_scan(MJpegDecodeContext *s, int predictor, int point_transform){
|
|
int i, mb_x, mb_y;
|
|
uint16_t buffer[2048][4];
|
|
int left[3], top[3], topleft[3];
|
|
const int linesize= s->linesize[0];
|
|
const int mask= (1<<s->bits)-1;
|
|
|
|
for(i=0; i<3; i++){
|
|
buffer[0][i]= 1 << (s->bits + point_transform - 1);
|
|
}
|
|
for(mb_y = 0; mb_y < s->mb_height; mb_y++) {
|
|
const int modified_predictor= mb_y ? predictor : 1;
|
|
uint8_t *ptr = s->picture.data[0] + (linesize * mb_y);
|
|
|
|
if (s->interlaced && s->bottom_field)
|
|
ptr += linesize >> 1;
|
|
|
|
for(i=0; i<3; i++){
|
|
top[i]= left[i]= topleft[i]= buffer[0][i];
|
|
}
|
|
for(mb_x = 0; mb_x < s->mb_width; mb_x++) {
|
|
if (s->restart_interval && !s->restart_count)
|
|
s->restart_count = s->restart_interval;
|
|
|
|
for(i=0;i<3;i++) {
|
|
int pred;
|
|
|
|
topleft[i]= top[i];
|
|
top[i]= buffer[mb_x][i];
|
|
|
|
PREDICT(pred, topleft[i], top[i], left[i], modified_predictor);
|
|
|
|
left[i]=
|
|
buffer[mb_x][i]= mask & (pred + (mjpeg_decode_dc(s, s->dc_index[i]) << point_transform));
|
|
}
|
|
|
|
if (s->restart_interval && !--s->restart_count) {
|
|
align_get_bits(&s->gb);
|
|
skip_bits(&s->gb, 16); /* skip RSTn */
|
|
}
|
|
}
|
|
|
|
if(s->rct){
|
|
for(mb_x = 0; mb_x < s->mb_width; mb_x++) {
|
|
ptr[4*mb_x+1] = buffer[mb_x][0] - ((buffer[mb_x][1] + buffer[mb_x][2] - 0x200)>>2);
|
|
ptr[4*mb_x+0] = buffer[mb_x][1] + ptr[4*mb_x+1];
|
|
ptr[4*mb_x+2] = buffer[mb_x][2] + ptr[4*mb_x+1];
|
|
}
|
|
}else if(s->pegasus_rct){
|
|
for(mb_x = 0; mb_x < s->mb_width; mb_x++) {
|
|
ptr[4*mb_x+1] = buffer[mb_x][0] - ((buffer[mb_x][1] + buffer[mb_x][2])>>2);
|
|
ptr[4*mb_x+0] = buffer[mb_x][1] + ptr[4*mb_x+1];
|
|
ptr[4*mb_x+2] = buffer[mb_x][2] + ptr[4*mb_x+1];
|
|
}
|
|
}else{
|
|
for(mb_x = 0; mb_x < s->mb_width; mb_x++) {
|
|
ptr[4*mb_x+0] = buffer[mb_x][0];
|
|
ptr[4*mb_x+1] = buffer[mb_x][1];
|
|
ptr[4*mb_x+2] = buffer[mb_x][2];
|
|
}
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int ljpeg_decode_yuv_scan(MJpegDecodeContext *s, int predictor, int point_transform){
|
|
int i, mb_x, mb_y;
|
|
const int nb_components=3;
|
|
|
|
for(mb_y = 0; mb_y < s->mb_height; mb_y++) {
|
|
for(mb_x = 0; mb_x < s->mb_width; mb_x++) {
|
|
if (s->restart_interval && !s->restart_count)
|
|
s->restart_count = s->restart_interval;
|
|
|
|
if(mb_x==0 || mb_y==0 || s->interlaced){
|
|
for(i=0;i<nb_components;i++) {
|
|
uint8_t *ptr;
|
|
int n, h, v, x, y, c, j, linesize;
|
|
n = s->nb_blocks[i];
|
|
c = s->comp_index[i];
|
|
h = s->h_scount[i];
|
|
v = s->v_scount[i];
|
|
x = 0;
|
|
y = 0;
|
|
linesize= s->linesize[c];
|
|
|
|
for(j=0; j<n; j++) {
|
|
int pred;
|
|
|
|
ptr = s->picture.data[c] + (linesize * (v * mb_y + y)) + (h * mb_x + x); //FIXME optimize this crap
|
|
if(y==0 && mb_y==0){
|
|
if(x==0 && mb_x==0){
|
|
pred= 128 << point_transform;
|
|
}else{
|
|
pred= ptr[-1];
|
|
}
|
|
}else{
|
|
if(x==0 && mb_x==0){
|
|
pred= ptr[-linesize];
|
|
}else{
|
|
PREDICT(pred, ptr[-linesize-1], ptr[-linesize], ptr[-1], predictor);
|
|
}
|
|
}
|
|
|
|
if (s->interlaced && s->bottom_field)
|
|
ptr += linesize >> 1;
|
|
*ptr= pred + (mjpeg_decode_dc(s, s->dc_index[i]) << point_transform);
|
|
|
|
if (++x == h) {
|
|
x = 0;
|
|
y++;
|
|
}
|
|
}
|
|
}
|
|
}else{
|
|
for(i=0;i<nb_components;i++) {
|
|
uint8_t *ptr;
|
|
int n, h, v, x, y, c, j, linesize;
|
|
n = s->nb_blocks[i];
|
|
c = s->comp_index[i];
|
|
h = s->h_scount[i];
|
|
v = s->v_scount[i];
|
|
x = 0;
|
|
y = 0;
|
|
linesize= s->linesize[c];
|
|
|
|
for(j=0; j<n; j++) {
|
|
int pred;
|
|
|
|
ptr = s->picture.data[c] + (linesize * (v * mb_y + y)) + (h * mb_x + x); //FIXME optimize this crap
|
|
PREDICT(pred, ptr[-linesize-1], ptr[-linesize], ptr[-1], predictor);
|
|
*ptr= pred + (mjpeg_decode_dc(s, s->dc_index[i]) << point_transform);
|
|
if (++x == h) {
|
|
x = 0;
|
|
y++;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
if (s->restart_interval && !--s->restart_count) {
|
|
align_get_bits(&s->gb);
|
|
skip_bits(&s->gb, 16); /* skip RSTn */
|
|
}
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int mjpeg_decode_scan(MJpegDecodeContext *s){
|
|
int i, mb_x, mb_y;
|
|
const int nb_components=3;
|
|
|
|
for(mb_y = 0; mb_y < s->mb_height; mb_y++) {
|
|
for(mb_x = 0; mb_x < s->mb_width; mb_x++) {
|
|
if (s->restart_interval && !s->restart_count)
|
|
s->restart_count = s->restart_interval;
|
|
|
|
for(i=0;i<nb_components;i++) {
|
|
uint8_t *ptr;
|
|
int n, h, v, x, y, c, j;
|
|
n = s->nb_blocks[i];
|
|
c = s->comp_index[i];
|
|
h = s->h_scount[i];
|
|
v = s->v_scount[i];
|
|
x = 0;
|
|
y = 0;
|
|
for(j=0;j<n;j++) {
|
|
memset(s->block, 0, sizeof(s->block));
|
|
if (decode_block(s, s->block, i,
|
|
s->dc_index[i], s->ac_index[i],
|
|
s->quant_index[c]) < 0) {
|
|
dprintf("error y=%d x=%d\n", mb_y, mb_x);
|
|
return -1;
|
|
}
|
|
// dprintf("mb: %d %d processed\n", mb_y, mb_x);
|
|
ptr = s->picture.data[c] +
|
|
(s->linesize[c] * (v * mb_y + y) * 8) +
|
|
(h * mb_x + x) * 8;
|
|
if (s->interlaced && s->bottom_field)
|
|
ptr += s->linesize[c] >> 1;
|
|
//printf("%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);
|
|
s->idct_put(ptr, s->linesize[c], s->block);
|
|
if (++x == h) {
|
|
x = 0;
|
|
y++;
|
|
}
|
|
}
|
|
}
|
|
/* (< 1350) buggy workaround for Spectralfan.mov, should be fixed */
|
|
if (s->restart_interval && (s->restart_interval < 1350) &&
|
|
!--s->restart_count) {
|
|
align_get_bits(&s->gb);
|
|
skip_bits(&s->gb, 16); /* skip RSTn */
|
|
for (i=0; i<nb_components; i++) /* reset dc */
|
|
s->last_dc[i] = 1024;
|
|
}
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int mjpeg_decode_sos(MJpegDecodeContext *s)
|
|
{
|
|
int len, nb_components, i, h, v, predictor, point_transform;
|
|
int vmax, hmax, index, id;
|
|
const int block_size= s->lossless ? 1 : 8;
|
|
|
|
/* XXX: verify len field validity */
|
|
len = get_bits(&s->gb, 16);
|
|
nb_components = get_bits(&s->gb, 8);
|
|
if (len != 6+2*nb_components)
|
|
{
|
|
dprintf("decode_sos: invalid len (%d)\n", len);
|
|
return -1;
|
|
}
|
|
/* XXX: only interleaved scan accepted */
|
|
if (nb_components != s->nb_components)
|
|
{
|
|
dprintf("decode_sos: components(%d) mismatch\n", nb_components);
|
|
return -1;
|
|
}
|
|
vmax = 0;
|
|
hmax = 0;
|
|
for(i=0;i<nb_components;i++) {
|
|
id = get_bits(&s->gb, 8) - 1;
|
|
dprintf("component: %d\n", id);
|
|
/* find component index */
|
|
for(index=0;index<s->nb_components;index++)
|
|
if (id == s->component_id[index])
|
|
break;
|
|
if (index == s->nb_components)
|
|
{
|
|
dprintf("decode_sos: index(%d) out of components\n", index);
|
|
return -1;
|
|
}
|
|
|
|
s->comp_index[i] = index;
|
|
|
|
s->nb_blocks[i] = s->h_count[index] * s->v_count[index];
|
|
s->h_scount[i] = s->h_count[index];
|
|
s->v_scount[i] = s->v_count[index];
|
|
|
|
s->dc_index[i] = get_bits(&s->gb, 4);
|
|
s->ac_index[i] = get_bits(&s->gb, 4);
|
|
|
|
if (s->dc_index[i] < 0 || s->ac_index[i] < 0 ||
|
|
s->dc_index[i] >= 4 || s->ac_index[i] >= 4)
|
|
goto out_of_range;
|
|
#if 0 //buggy
|
|
switch(s->start_code)
|
|
{
|
|
case SOF0:
|
|
if (dc_index[i] > 1 || ac_index[i] > 1)
|
|
goto out_of_range;
|
|
break;
|
|
case SOF1:
|
|
case SOF2:
|
|
if (dc_index[i] > 3 || ac_index[i] > 3)
|
|
goto out_of_range;
|
|
break;
|
|
case SOF3:
|
|
if (dc_index[i] > 3 || ac_index[i] != 0)
|
|
goto out_of_range;
|
|
break;
|
|
}
|
|
#endif
|
|
}
|
|
|
|
predictor= get_bits(&s->gb, 8); /* lossless predictor or start of spectral (Ss) */
|
|
skip_bits(&s->gb, 8); /* Se */
|
|
skip_bits(&s->gb, 4); /* Ah */
|
|
point_transform= get_bits(&s->gb, 4); /* Al */
|
|
|
|
for(i=0;i<nb_components;i++)
|
|
s->last_dc[i] = 1024;
|
|
|
|
if (nb_components > 1) {
|
|
/* interleaved stream */
|
|
s->mb_width = (s->width + s->h_max * block_size - 1) / (s->h_max * block_size);
|
|
s->mb_height = (s->height + s->v_max * block_size - 1) / (s->v_max * block_size);
|
|
} else {
|
|
h = s->h_max / s->h_scount[s->comp_index[0]];
|
|
v = s->v_max / s->v_scount[s->comp_index[0]];
|
|
s->mb_width = (s->width + h * block_size - 1) / (h * block_size);
|
|
s->mb_height = (s->height + v * block_size - 1) / (v * block_size);
|
|
s->nb_blocks[0] = 1;
|
|
s->h_scount[0] = 1;
|
|
s->v_scount[0] = 1;
|
|
}
|
|
|
|
if(s->avctx->debug & FF_DEBUG_PICT_INFO)
|
|
av_log(s->avctx, AV_LOG_DEBUG, "%s %s p:%d >>:%d\n", s->lossless ? "lossless" : "sequencial DCT", s->rgb ? "RGB" : "", predictor, point_transform);
|
|
|
|
if(s->lossless){
|
|
if(s->rgb){
|
|
if(ljpeg_decode_rgb_scan(s, predictor, point_transform) < 0)
|
|
return -1;
|
|
}else{
|
|
if(ljpeg_decode_yuv_scan(s, predictor, point_transform) < 0)
|
|
return -1;
|
|
}
|
|
}else{
|
|
if(mjpeg_decode_scan(s) < 0)
|
|
return -1;
|
|
}
|
|
emms_c();
|
|
return 0;
|
|
out_of_range:
|
|
dprintf("decode_sos: ac/dc index out of range\n");
|
|
return -1;
|
|
}
|
|
|
|
static int mjpeg_decode_dri(MJpegDecodeContext *s)
|
|
{
|
|
if (get_bits(&s->gb, 16) != 4)
|
|
return -1;
|
|
s->restart_interval = get_bits(&s->gb, 16);
|
|
dprintf("restart interval: %d\n", s->restart_interval);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int mjpeg_decode_app(MJpegDecodeContext *s)
|
|
{
|
|
int len, id;
|
|
|
|
/* XXX: verify len field validity */
|
|
len = get_bits(&s->gb, 16);
|
|
if (len < 5)
|
|
return -1;
|
|
|
|
id = (get_bits(&s->gb, 16) << 16) | get_bits(&s->gb, 16);
|
|
id = be2me_32(id);
|
|
len -= 6;
|
|
|
|
if(s->avctx->debug & FF_DEBUG_STARTCODE){
|
|
av_log(s->avctx, AV_LOG_DEBUG, "APPx %8X\n", id);
|
|
}
|
|
|
|
/* buggy AVID, it puts EOI only at every 10th frame */
|
|
/* also this fourcc is used by non-avid files too, it holds some
|
|
informations, but it's always present in AVID creates files */
|
|
if (id == ff_get_fourcc("AVI1"))
|
|
{
|
|
/* structure:
|
|
4bytes AVI1
|
|
1bytes polarity
|
|
1bytes always zero
|
|
4bytes field_size
|
|
4bytes field_size_less_padding
|
|
*/
|
|
s->buggy_avid = 1;
|
|
// if (s->first_picture)
|
|
// printf("mjpeg: workarounding buggy AVID\n");
|
|
s->interlace_polarity = get_bits(&s->gb, 8);
|
|
#if 0
|
|
skip_bits(&s->gb, 8);
|
|
skip_bits(&s->gb, 32);
|
|
skip_bits(&s->gb, 32);
|
|
len -= 10;
|
|
#endif
|
|
// if (s->interlace_polarity)
|
|
// printf("mjpeg: interlace polarity: %d\n", s->interlace_polarity);
|
|
goto out;
|
|
}
|
|
|
|
// len -= 2;
|
|
|
|
if (id == ff_get_fourcc("JFIF"))
|
|
{
|
|
int t_w, t_h, v1, v2;
|
|
skip_bits(&s->gb, 8); /* the trailing zero-byte */
|
|
v1= get_bits(&s->gb, 8);
|
|
v2= get_bits(&s->gb, 8);
|
|
skip_bits(&s->gb, 8);
|
|
|
|
s->avctx->sample_aspect_ratio.num= get_bits(&s->gb, 16);
|
|
s->avctx->sample_aspect_ratio.den= get_bits(&s->gb, 16);
|
|
|
|
if (s->avctx->debug & FF_DEBUG_PICT_INFO)
|
|
av_log(s->avctx, AV_LOG_INFO, "mjpeg: JFIF header found (version: %x.%x) SAR=%d/%d\n",
|
|
v1, v2,
|
|
s->avctx->sample_aspect_ratio.num,
|
|
s->avctx->sample_aspect_ratio.den
|
|
);
|
|
|
|
t_w = get_bits(&s->gb, 8);
|
|
t_h = get_bits(&s->gb, 8);
|
|
if (t_w && t_h)
|
|
{
|
|
/* skip thumbnail */
|
|
if (len-10-(t_w*t_h*3) > 0)
|
|
len -= t_w*t_h*3;
|
|
}
|
|
len -= 10;
|
|
goto out;
|
|
}
|
|
|
|
if (id == ff_get_fourcc("Adob") && (get_bits(&s->gb, 8) == 'e'))
|
|
{
|
|
if (s->avctx->debug & FF_DEBUG_PICT_INFO)
|
|
av_log(s->avctx, AV_LOG_INFO, "mjpeg: Adobe header found\n");
|
|
skip_bits(&s->gb, 16); /* version */
|
|
skip_bits(&s->gb, 16); /* flags0 */
|
|
skip_bits(&s->gb, 16); /* flags1 */
|
|
skip_bits(&s->gb, 8); /* transform */
|
|
len -= 7;
|
|
goto out;
|
|
}
|
|
|
|
if (id == ff_get_fourcc("LJIF")){
|
|
if (s->avctx->debug & FF_DEBUG_PICT_INFO)
|
|
av_log(s->avctx, AV_LOG_INFO, "Pegasus lossless jpeg header found\n");
|
|
skip_bits(&s->gb, 16); /* version ? */
|
|
skip_bits(&s->gb, 16); /* unknwon always 0? */
|
|
skip_bits(&s->gb, 16); /* unknwon always 0? */
|
|
skip_bits(&s->gb, 16); /* unknwon always 0? */
|
|
switch( get_bits(&s->gb, 8)){
|
|
case 1:
|
|
s->rgb= 1;
|
|
s->pegasus_rct=0;
|
|
break;
|
|
case 2:
|
|
s->rgb= 1;
|
|
s->pegasus_rct=1;
|
|
break;
|
|
default:
|
|
av_log(s->avctx, AV_LOG_ERROR, "unknown colorspace\n");
|
|
}
|
|
len -= 9;
|
|
goto out;
|
|
}
|
|
|
|
/* Apple MJPEG-A */
|
|
if ((s->start_code == APP1) && (len > (0x28 - 8)))
|
|
{
|
|
id = (get_bits(&s->gb, 16) << 16) | get_bits(&s->gb, 16);
|
|
id = be2me_32(id);
|
|
len -= 4;
|
|
if (id == ff_get_fourcc("mjpg")) /* Apple MJPEG-A */
|
|
{
|
|
#if 0
|
|
skip_bits(&s->gb, 32); /* field size */
|
|
skip_bits(&s->gb, 32); /* pad field size */
|
|
skip_bits(&s->gb, 32); /* next off */
|
|
skip_bits(&s->gb, 32); /* quant off */
|
|
skip_bits(&s->gb, 32); /* huff off */
|
|
skip_bits(&s->gb, 32); /* image off */
|
|
skip_bits(&s->gb, 32); /* scan off */
|
|
skip_bits(&s->gb, 32); /* data off */
|
|
#endif
|
|
if (s->avctx->debug & FF_DEBUG_PICT_INFO)
|
|
av_log(s->avctx, AV_LOG_INFO, "mjpeg: Apple MJPEG-A header found\n");
|
|
}
|
|
}
|
|
|
|
out:
|
|
/* slow but needed for extreme adobe jpegs */
|
|
if (len < 0)
|
|
av_log(s->avctx, AV_LOG_ERROR, "mjpeg: error, decode_app parser read over the end\n");
|
|
while(--len > 0)
|
|
skip_bits(&s->gb, 8);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int mjpeg_decode_com(MJpegDecodeContext *s)
|
|
{
|
|
/* XXX: verify len field validity */
|
|
int len = get_bits(&s->gb, 16);
|
|
if (len >= 2 && len < 32768) {
|
|
/* XXX: any better upper bound */
|
|
uint8_t *cbuf = av_malloc(len - 1);
|
|
if (cbuf) {
|
|
int i;
|
|
for (i = 0; i < len - 2; i++)
|
|
cbuf[i] = get_bits(&s->gb, 8);
|
|
if (i > 0 && cbuf[i-1] == '\n')
|
|
cbuf[i-1] = 0;
|
|
else
|
|
cbuf[i] = 0;
|
|
|
|
if(s->avctx->debug & FF_DEBUG_PICT_INFO)
|
|
av_log(s->avctx, AV_LOG_INFO, "mjpeg comment: '%s'\n", cbuf);
|
|
|
|
/* buggy avid, it puts EOI only at every 10th frame */
|
|
if (!strcmp(cbuf, "AVID"))
|
|
{
|
|
s->buggy_avid = 1;
|
|
// if (s->first_picture)
|
|
// printf("mjpeg: workarounding buggy AVID\n");
|
|
}
|
|
|
|
av_free(cbuf);
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
#if 0
|
|
static int valid_marker_list[] =
|
|
{
|
|
/* 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, a, b, c, d, e, f */
|
|
/* 0 */ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
|
|
/* 1 */ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
|
|
/* 2 */ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
|
|
/* 3 */ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
|
|
/* 4 */ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
|
|
/* 5 */ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
|
|
/* 6 */ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
|
|
/* 7 */ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
|
|
/* 8 */ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
|
|
/* 9 */ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
|
|
/* a */ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
|
|
/* b */ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
|
|
/* c */ 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
|
|
/* d */ 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
|
|
/* e */ 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
|
|
/* f */ 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0,
|
|
}
|
|
#endif
|
|
|
|
/* return the 8 bit start code value and update the search
|
|
state. Return -1 if no start code found */
|
|
static int find_marker(uint8_t **pbuf_ptr, uint8_t *buf_end)
|
|
{
|
|
uint8_t *buf_ptr;
|
|
unsigned int v, v2;
|
|
int val;
|
|
#ifdef DEBUG
|
|
int skipped=0;
|
|
#endif
|
|
|
|
buf_ptr = *pbuf_ptr;
|
|
while (buf_ptr < buf_end) {
|
|
v = *buf_ptr++;
|
|
v2 = *buf_ptr;
|
|
if ((v == 0xff) && (v2 >= 0xc0) && (v2 <= 0xfe) && buf_ptr < buf_end) {
|
|
val = *buf_ptr++;
|
|
goto found;
|
|
}
|
|
#ifdef DEBUG
|
|
skipped++;
|
|
#endif
|
|
}
|
|
val = -1;
|
|
found:
|
|
#ifdef DEBUG
|
|
dprintf("find_marker skipped %d bytes\n", skipped);
|
|
#endif
|
|
*pbuf_ptr = buf_ptr;
|
|
return val;
|
|
}
|
|
|
|
static int mjpeg_decode_frame(AVCodecContext *avctx,
|
|
void *data, int *data_size,
|
|
uint8_t *buf, int buf_size)
|
|
{
|
|
MJpegDecodeContext *s = avctx->priv_data;
|
|
uint8_t *buf_end, *buf_ptr;
|
|
int start_code;
|
|
AVFrame *picture = data;
|
|
|
|
*data_size = 0;
|
|
|
|
/* no supplementary picture */
|
|
if (buf_size == 0)
|
|
return 0;
|
|
|
|
buf_ptr = buf;
|
|
buf_end = buf + buf_size;
|
|
while (buf_ptr < buf_end) {
|
|
/* find start next marker */
|
|
start_code = find_marker(&buf_ptr, buf_end);
|
|
{
|
|
/* EOF */
|
|
if (start_code < 0) {
|
|
goto the_end;
|
|
} else {
|
|
dprintf("marker=%x avail_size_in_buf=%d\n", start_code, buf_end - buf_ptr);
|
|
|
|
if ((buf_end - buf_ptr) > s->buffer_size)
|
|
{
|
|
av_free(s->buffer);
|
|
s->buffer_size = buf_end-buf_ptr;
|
|
s->buffer = av_malloc(s->buffer_size);
|
|
dprintf("buffer too small, expanding to %d bytes\n",
|
|
s->buffer_size);
|
|
}
|
|
|
|
/* unescape buffer of SOS */
|
|
if (start_code == SOS)
|
|
{
|
|
uint8_t *src = buf_ptr;
|
|
uint8_t *dst = s->buffer;
|
|
|
|
while (src<buf_end)
|
|
{
|
|
uint8_t x = *(src++);
|
|
|
|
*(dst++) = x;
|
|
if (x == 0xff)
|
|
{
|
|
while(*src == 0xff) src++;
|
|
|
|
x = *(src++);
|
|
if (x >= 0xd0 && x <= 0xd7)
|
|
*(dst++) = x;
|
|
else if (x)
|
|
break;
|
|
}
|
|
}
|
|
init_get_bits(&s->gb, s->buffer, (dst - s->buffer)*8);
|
|
|
|
dprintf("escaping removed %d bytes\n",
|
|
(buf_end - buf_ptr) - (dst - s->buffer));
|
|
}
|
|
else
|
|
init_get_bits(&s->gb, buf_ptr, (buf_end - buf_ptr)*8);
|
|
|
|
s->start_code = start_code;
|
|
if(s->avctx->debug & FF_DEBUG_STARTCODE){
|
|
av_log(s->avctx, AV_LOG_DEBUG, "startcode: %X\n", start_code);
|
|
}
|
|
|
|
/* process markers */
|
|
if (start_code >= 0xd0 && start_code <= 0xd7) {
|
|
dprintf("restart marker: %d\n", start_code&0x0f);
|
|
/* APP fields */
|
|
} else if (start_code >= APP0 && start_code <= APP15) {
|
|
mjpeg_decode_app(s);
|
|
/* Comment */
|
|
} else if (start_code == COM){
|
|
mjpeg_decode_com(s);
|
|
}
|
|
|
|
switch(start_code) {
|
|
case SOI:
|
|
s->restart_interval = 0;
|
|
/* nothing to do on SOI */
|
|
break;
|
|
case DQT:
|
|
mjpeg_decode_dqt(s);
|
|
break;
|
|
case DHT:
|
|
if(mjpeg_decode_dht(s) < 0){
|
|
av_log(s->avctx, AV_LOG_ERROR, "huffman table decode error\n");
|
|
return -1;
|
|
}
|
|
break;
|
|
case SOF0:
|
|
s->lossless=0;
|
|
if (mjpeg_decode_sof(s) < 0)
|
|
return -1;
|
|
break;
|
|
case SOF3:
|
|
s->lossless=1;
|
|
if (mjpeg_decode_sof(s) < 0)
|
|
return -1;
|
|
break;
|
|
case EOI:
|
|
if ((s->buggy_avid && !s->interlaced) || s->restart_interval)
|
|
break;
|
|
eoi_parser:
|
|
{
|
|
if (s->interlaced) {
|
|
s->bottom_field ^= 1;
|
|
/* if not bottom field, do not output image yet */
|
|
if (s->bottom_field)
|
|
goto not_the_end;
|
|
}
|
|
*picture = s->picture;
|
|
*data_size = sizeof(AVFrame);
|
|
|
|
if(!s->lossless){
|
|
picture->quality= FFMAX(FFMAX(s->qscale[0], s->qscale[1]), s->qscale[2]);
|
|
picture->qstride= 0;
|
|
picture->qscale_table= s->qscale_table;
|
|
memset(picture->qscale_table, picture->quality, (s->width+15)/16);
|
|
if(avctx->debug & FF_DEBUG_QP)
|
|
av_log(s->avctx, AV_LOG_DEBUG, "QP: %d\n", picture->quality);
|
|
picture->quality*= FF_QP2LAMBDA;
|
|
}
|
|
|
|
goto the_end;
|
|
}
|
|
break;
|
|
case SOS:
|
|
mjpeg_decode_sos(s);
|
|
/* buggy avid puts EOI every 10-20th frame */
|
|
/* if restart period is over process EOI */
|
|
if ((s->buggy_avid && !s->interlaced) || s->restart_interval)
|
|
goto eoi_parser;
|
|
break;
|
|
case DRI:
|
|
mjpeg_decode_dri(s);
|
|
break;
|
|
case SOF1:
|
|
case SOF2:
|
|
case SOF5:
|
|
case SOF6:
|
|
case SOF7:
|
|
case SOF9:
|
|
case SOF10:
|
|
case SOF11:
|
|
case SOF13:
|
|
case SOF14:
|
|
case SOF15:
|
|
case JPG:
|
|
av_log(s->avctx, AV_LOG_ERROR, "mjpeg: unsupported coding type (%x)\n", start_code);
|
|
break;
|
|
// default:
|
|
// printf("mjpeg: unsupported marker (%x)\n", start_code);
|
|
// break;
|
|
}
|
|
|
|
not_the_end:
|
|
/* eof process start code */
|
|
buf_ptr += (get_bits_count(&s->gb)+7)/8;
|
|
dprintf("marker parser used %d bytes (%d bits)\n",
|
|
(get_bits_count(&s->gb)+7)/8, get_bits_count(&s->gb));
|
|
}
|
|
}
|
|
}
|
|
the_end:
|
|
dprintf("mjpeg decode frame unused %d bytes\n", buf_end - buf_ptr);
|
|
// return buf_end - buf_ptr;
|
|
return buf_ptr - buf;
|
|
}
|
|
|
|
static int mjpegb_decode_frame(AVCodecContext *avctx,
|
|
void *data, int *data_size,
|
|
uint8_t *buf, int buf_size)
|
|
{
|
|
MJpegDecodeContext *s = avctx->priv_data;
|
|
uint8_t *buf_end, *buf_ptr;
|
|
AVFrame *picture = data;
|
|
GetBitContext hgb; /* for the header */
|
|
uint32_t dqt_offs, dht_offs, sof_offs, sos_offs, second_field_offs;
|
|
uint32_t field_size;
|
|
|
|
*data_size = 0;
|
|
|
|
/* no supplementary picture */
|
|
if (buf_size == 0)
|
|
return 0;
|
|
|
|
buf_ptr = buf;
|
|
buf_end = buf + buf_size;
|
|
|
|
read_header:
|
|
/* reset on every SOI */
|
|
s->restart_interval = 0;
|
|
|
|
init_get_bits(&hgb, buf_ptr, /*buf_size*/(buf_end - buf_ptr)*8);
|
|
|
|
skip_bits(&hgb, 32); /* reserved zeros */
|
|
|
|
if (get_bits(&hgb, 32) != be2me_32(ff_get_fourcc("mjpg")))
|
|
{
|
|
dprintf("not mjpeg-b (bad fourcc)\n");
|
|
return 0;
|
|
}
|
|
|
|
field_size = get_bits(&hgb, 32); /* field size */
|
|
dprintf("field size: 0x%x\n", field_size);
|
|
skip_bits(&hgb, 32); /* padded field size */
|
|
second_field_offs = get_bits(&hgb, 32);
|
|
dprintf("second field offs: 0x%x\n", second_field_offs);
|
|
if (second_field_offs)
|
|
s->interlaced = 1;
|
|
|
|
dqt_offs = get_bits(&hgb, 32);
|
|
dprintf("dqt offs: 0x%x\n", dqt_offs);
|
|
if (dqt_offs)
|
|
{
|
|
init_get_bits(&s->gb, buf+dqt_offs, (buf_end - (buf+dqt_offs))*8);
|
|
s->start_code = DQT;
|
|
mjpeg_decode_dqt(s);
|
|
}
|
|
|
|
dht_offs = get_bits(&hgb, 32);
|
|
dprintf("dht offs: 0x%x\n", dht_offs);
|
|
if (dht_offs)
|
|
{
|
|
init_get_bits(&s->gb, buf+dht_offs, (buf_end - (buf+dht_offs))*8);
|
|
s->start_code = DHT;
|
|
mjpeg_decode_dht(s);
|
|
}
|
|
|
|
sof_offs = get_bits(&hgb, 32);
|
|
dprintf("sof offs: 0x%x\n", sof_offs);
|
|
if (sof_offs)
|
|
{
|
|
init_get_bits(&s->gb, buf+sof_offs, (buf_end - (buf+sof_offs))*8);
|
|
s->start_code = SOF0;
|
|
if (mjpeg_decode_sof(s) < 0)
|
|
return -1;
|
|
}
|
|
|
|
sos_offs = get_bits(&hgb, 32);
|
|
dprintf("sos offs: 0x%x\n", sos_offs);
|
|
if (sos_offs)
|
|
{
|
|
// init_get_bits(&s->gb, buf+sos_offs, (buf_end - (buf+sos_offs))*8);
|
|
init_get_bits(&s->gb, buf+sos_offs, field_size*8);
|
|
s->start_code = SOS;
|
|
mjpeg_decode_sos(s);
|
|
}
|
|
|
|
skip_bits(&hgb, 32); /* start of data offset */
|
|
|
|
if (s->interlaced) {
|
|
s->bottom_field ^= 1;
|
|
/* if not bottom field, do not output image yet */
|
|
if (s->bottom_field && second_field_offs)
|
|
{
|
|
buf_ptr = buf + second_field_offs;
|
|
second_field_offs = 0;
|
|
goto read_header;
|
|
}
|
|
}
|
|
|
|
//XXX FIXME factorize, this looks very similar to the EOI code
|
|
|
|
*picture= s->picture;
|
|
*data_size = sizeof(AVFrame);
|
|
|
|
if(!s->lossless){
|
|
picture->quality= FFMAX(FFMAX(s->qscale[0], s->qscale[1]), s->qscale[2]);
|
|
picture->qstride= 0;
|
|
picture->qscale_table= s->qscale_table;
|
|
memset(picture->qscale_table, picture->quality, (s->width+15)/16);
|
|
if(avctx->debug & FF_DEBUG_QP)
|
|
av_log(avctx, AV_LOG_DEBUG, "QP: %d\n", picture->quality);
|
|
picture->quality*= FF_QP2LAMBDA;
|
|
}
|
|
|
|
return buf_ptr - buf;
|
|
}
|
|
|
|
#include "sp5x.h"
|
|
|
|
static int sp5x_decode_frame(AVCodecContext *avctx,
|
|
void *data, int *data_size,
|
|
uint8_t *buf, int buf_size)
|
|
{
|
|
#if 0
|
|
MJpegDecodeContext *s = avctx->priv_data;
|
|
#endif
|
|
const int qscale = 5;
|
|
uint8_t *buf_ptr, *buf_end, *recoded;
|
|
int i = 0, j = 0;
|
|
|
|
*data_size = 0;
|
|
|
|
/* no supplementary picture */
|
|
if (buf_size == 0)
|
|
return 0;
|
|
|
|
if (!avctx->width || !avctx->height)
|
|
return -1;
|
|
|
|
buf_ptr = buf;
|
|
buf_end = buf + buf_size;
|
|
|
|
#if 1
|
|
recoded = av_mallocz(buf_size + 1024);
|
|
if (!recoded)
|
|
return -1;
|
|
|
|
/* SOI */
|
|
recoded[j++] = 0xFF;
|
|
recoded[j++] = 0xD8;
|
|
|
|
memcpy(recoded+j, &sp5x_data_dqt[0], sizeof(sp5x_data_dqt));
|
|
memcpy(recoded+j+5, &sp5x_quant_table[qscale * 2], 64);
|
|
memcpy(recoded+j+70, &sp5x_quant_table[(qscale * 2) + 1], 64);
|
|
j += sizeof(sp5x_data_dqt);
|
|
|
|
memcpy(recoded+j, &sp5x_data_dht[0], sizeof(sp5x_data_dht));
|
|
j += sizeof(sp5x_data_dht);
|
|
|
|
memcpy(recoded+j, &sp5x_data_sof[0], sizeof(sp5x_data_sof));
|
|
recoded[j+5] = (avctx->height >> 8) & 0xFF;
|
|
recoded[j+6] = avctx->height & 0xFF;
|
|
recoded[j+7] = (avctx->width >> 8) & 0xFF;
|
|
recoded[j+8] = avctx->width & 0xFF;
|
|
j += sizeof(sp5x_data_sof);
|
|
|
|
memcpy(recoded+j, &sp5x_data_sos[0], sizeof(sp5x_data_sos));
|
|
j += sizeof(sp5x_data_sos);
|
|
|
|
for (i = 14; i < buf_size && j < buf_size+1024-2; i++)
|
|
{
|
|
recoded[j++] = buf[i];
|
|
if (buf[i] == 0xff)
|
|
recoded[j++] = 0;
|
|
}
|
|
|
|
/* EOI */
|
|
recoded[j++] = 0xFF;
|
|
recoded[j++] = 0xD9;
|
|
|
|
i = mjpeg_decode_frame(avctx, data, data_size, recoded, j);
|
|
|
|
av_free(recoded);
|
|
|
|
#else
|
|
/* SOF */
|
|
s->bits = 8;
|
|
s->width = avctx->width;
|
|
s->height = avctx->height;
|
|
s->nb_components = 3;
|
|
s->component_id[0] = 0;
|
|
s->h_count[0] = 2;
|
|
s->v_count[0] = 2;
|
|
s->quant_index[0] = 0;
|
|
s->component_id[1] = 1;
|
|
s->h_count[1] = 1;
|
|
s->v_count[1] = 1;
|
|
s->quant_index[1] = 1;
|
|
s->component_id[2] = 2;
|
|
s->h_count[2] = 1;
|
|
s->v_count[2] = 1;
|
|
s->quant_index[2] = 1;
|
|
s->h_max = 2;
|
|
s->v_max = 2;
|
|
|
|
s->qscale_table = av_mallocz((s->width+15)/16);
|
|
avctx->pix_fmt = PIX_FMT_YUV420P;
|
|
s->interlaced = 0;
|
|
|
|
s->picture.reference = 0;
|
|
if (avctx->get_buffer(avctx, &s->picture) < 0)
|
|
{
|
|
fprintf(stderr, "get_buffer() failed\n");
|
|
return -1;
|
|
}
|
|
|
|
s->picture.pict_type = I_TYPE;
|
|
s->picture.key_frame = 1;
|
|
|
|
for (i = 0; i < 3; i++)
|
|
s->linesize[i] = s->picture.linesize[i] << s->interlaced;
|
|
|
|
/* DQT */
|
|
for (i = 0; i < 64; i++)
|
|
{
|
|
j = s->scantable.permutated[i];
|
|
s->quant_matrixes[0][j] = sp5x_quant_table[(qscale * 2) + i];
|
|
}
|
|
s->qscale[0] = FFMAX(
|
|
s->quant_matrixes[0][s->scantable.permutated[1]],
|
|
s->quant_matrixes[0][s->scantable.permutated[8]]) >> 1;
|
|
|
|
for (i = 0; i < 64; i++)
|
|
{
|
|
j = s->scantable.permutated[i];
|
|
s->quant_matrixes[1][j] = sp5x_quant_table[(qscale * 2) + 1 + i];
|
|
}
|
|
s->qscale[1] = FFMAX(
|
|
s->quant_matrixes[1][s->scantable.permutated[1]],
|
|
s->quant_matrixes[1][s->scantable.permutated[8]]) >> 1;
|
|
|
|
/* DHT */
|
|
|
|
/* SOS */
|
|
s->comp_index[0] = 0;
|
|
s->nb_blocks[0] = s->h_count[0] * s->v_count[0];
|
|
s->h_scount[0] = s->h_count[0];
|
|
s->v_scount[0] = s->v_count[0];
|
|
s->dc_index[0] = 0;
|
|
s->ac_index[0] = 0;
|
|
|
|
s->comp_index[1] = 1;
|
|
s->nb_blocks[1] = s->h_count[1] * s->v_count[1];
|
|
s->h_scount[1] = s->h_count[1];
|
|
s->v_scount[1] = s->v_count[1];
|
|
s->dc_index[1] = 1;
|
|
s->ac_index[1] = 1;
|
|
|
|
s->comp_index[2] = 2;
|
|
s->nb_blocks[2] = s->h_count[2] * s->v_count[2];
|
|
s->h_scount[2] = s->h_count[2];
|
|
s->v_scount[2] = s->v_count[2];
|
|
s->dc_index[2] = 1;
|
|
s->ac_index[2] = 1;
|
|
|
|
for (i = 0; i < 3; i++)
|
|
s->last_dc[i] = 1024;
|
|
|
|
s->mb_width = (s->width * s->h_max * 8 -1) / (s->h_max * 8);
|
|
s->mb_height = (s->height * s->v_max * 8 -1) / (s->v_max * 8);
|
|
|
|
init_get_bits(&s->gb, buf+14, (buf_size-14)*8);
|
|
|
|
return mjpeg_decode_scan(s);
|
|
#endif
|
|
|
|
return i;
|
|
}
|
|
|
|
static int mjpeg_decode_end(AVCodecContext *avctx)
|
|
{
|
|
MJpegDecodeContext *s = avctx->priv_data;
|
|
int i, j;
|
|
|
|
av_free(s->buffer);
|
|
av_free(s->qscale_table);
|
|
avcodec_default_free_buffers(avctx);
|
|
|
|
for(i=0;i<2;i++) {
|
|
for(j=0;j<4;j++)
|
|
free_vlc(&s->vlcs[i][j]);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
AVCodec mjpeg_decoder = {
|
|
"mjpeg",
|
|
CODEC_TYPE_VIDEO,
|
|
CODEC_ID_MJPEG,
|
|
sizeof(MJpegDecodeContext),
|
|
mjpeg_decode_init,
|
|
NULL,
|
|
mjpeg_decode_end,
|
|
mjpeg_decode_frame,
|
|
CODEC_CAP_DR1,
|
|
NULL
|
|
};
|
|
|
|
AVCodec mjpegb_decoder = {
|
|
"mjpegb",
|
|
CODEC_TYPE_VIDEO,
|
|
CODEC_ID_MJPEGB,
|
|
sizeof(MJpegDecodeContext),
|
|
mjpeg_decode_init,
|
|
NULL,
|
|
mjpeg_decode_end,
|
|
mjpegb_decode_frame,
|
|
CODEC_CAP_DR1,
|
|
NULL
|
|
};
|
|
|
|
AVCodec sp5x_decoder = {
|
|
"sp5x",
|
|
CODEC_TYPE_VIDEO,
|
|
CODEC_ID_SP5X,
|
|
sizeof(MJpegDecodeContext),
|
|
mjpeg_decode_init,
|
|
NULL,
|
|
mjpeg_decode_end,
|
|
sp5x_decode_frame,
|
|
CODEC_CAP_DR1,
|
|
NULL
|
|
};
|
|
|
|
#ifdef CONFIG_ENCODERS
|
|
AVCodec ljpeg_encoder = { //FIXME avoid MPV_* lossless jpeg shouldnt need them
|
|
"ljpeg",
|
|
CODEC_TYPE_VIDEO,
|
|
CODEC_ID_LJPEG,
|
|
sizeof(MpegEncContext),
|
|
MPV_encode_init,
|
|
encode_picture_lossless,
|
|
MPV_encode_end,
|
|
};
|
|
#endif
|