+++ /dev/null
-/*
- * 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;
- }
-}
-
-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);
-}
-
-#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"); /* 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 */
- switch(s->aspect_ratio_info)
- {
- case FF_ASPECT_4_3_625:
- case FF_ASPECT_4_3_525:
- put_bits(p, 16, 4);
- put_bits(p, 16, 3);
- break;
- case FF_ASPECT_16_9_625:
- case FF_ASPECT_16_9_525:
- put_bits(p, 16, 16);
- put_bits(p, 16, 9);
- break;
- case FF_ASPECT_EXTENDED:
- put_bits(p, 16, s->aspected_width);
- put_bits(p, 16, s->aspected_height);
- break;
- case FF_ASPECT_SQUARE:
- default:
- put_bits(p, 16, 1); /* aspect: 1:1 */
- put_bits(p, 16, 1);
- break;
- }
- 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);
- 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= get_bit_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 mjpeg_picture_trailer(MpegEncContext *s)
-{
- int pad= (-get_bit_count(&s->pb))&7;
-
- put_bits(&s->pb, pad,0xFF>>(8-pad));
- 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, NULL, NULL);
-
- *p = *pict;
- p->pict_type= FF_I_TYPE;
- p->key_frame= 1;
-
- mjpeg_picture_header(s);
-
- s->header_bits= get_bit_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 (get_bit_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_width, 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 ?) */
- uint8_t *current_picture[MAX_COMPONENTS]; /* picture structure */
- int linesize[MAX_COMPONENTS];
- 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.flags= avctx->flags;
- s2.avctx= avctx;
-// s2->out_format = FMT_MJPEG;
- s2.width = 8;
- s2.height = 8;
- if (MPV_common_init(&s2) < 0)
- return -1;
- s->scantable= s2.intra_scantable;
- s->idct_put= s2.dsp.idct_put;
- MPV_common_end(&s2);
-
- 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_width = avctx->width;
- 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)
- {
- printf("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;
- 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){
- printf("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) {
- for(i=0;i<MAX_COMPONENTS;i++)
- av_freep(&s->current_picture[i]);
-
- av_freep(&s->qscale_table);
-
- s->width = width;
- s->height = 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;
- }
-
- if(s->rgb){
- int w, h;
- w = s->width;
- h = s->height;
- if (s->interlaced)
- w *= 2;
- s->linesize[0] = 4*w;
- s->current_picture[0] = av_mallocz(4*w * h);
- s->current_picture[1] = s->current_picture[2] = NULL;
- }else{
- for(i=0;i<nb_components;i++) {
- int w, h;
- w = (s->width + 8 * s->h_max - 1) / (8 * s->h_max);
- h = (s->height + 8 * s->v_max - 1) / (8 * s->v_max);
- w = w * 8 * s->h_count[i];
- h = h * 8 * s->v_count[i];
- if (s->interlaced)
- w *= 2;
- s->linesize[i] = w;
- s->current_picture[i] = av_mallocz(w * h);
- if (!s->current_picture[i])
- {
- dprintf("error: no picture buffers allocated\n");
- return -1;
- }
- }
- }
- s->qscale_table= av_mallocz((s->width+15)/16);
-
- s->first_picture = 0;
- }
-
- 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->current_picture[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->current_picture[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->current_picture[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->current_picture[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;
- 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 != 3)
- {
- 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)
- printf("%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){
- printf("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;
- skip_bits(&s->gb, 8); /* the trailing zero-byte */
- printf("mjpeg: JFIF header found (version: %x.%x)\n",
- get_bits(&s->gb, 8), get_bits(&s->gb, 8));
- if (get_bits(&s->gb, 8) == 0)
- {
- int x_density, y_density;
- x_density = get_bits(&s->gb, 16);
- y_density = get_bits(&s->gb, 16);
-
- dprintf("x/y density: %d (%f), %d (%f)\n", x_density,
- (float)x_density, y_density, (float)y_density);
-#if 0
- //MN: needs to be checked
- if(x_density)
-// s->avctx->aspect_ratio= s->width*y_density/((float)s->height*x_density);
- s->avctx->aspect_ratio = (float)x_density/y_density;
- /* it's better, but every JFIF I have seen stores 1:1 */
- else
- s->avctx->aspect_ratio= 0.0;
-#endif
- }
- else
- {
- skip_bits(&s->gb, 16);
- skip_bits(&s->gb, 16);
- }
-
- 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'))
- {
- printf("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")){
- printf("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:
- printf("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->first_picture)
- printf("mjpeg: Apple MJPEG-A header found\n");
- }
- }
-
-out:
- /* slow but needed for extreme adobe jpegs */
- if (len < 0)
- printf("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;
-
- printf("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)) {
- 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 i, 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){
- printf("startcode: %X\n", start_code);
- }
-
- /* process markers */
- if (start_code >= 0xd0 && start_code <= 0xd7) {
- dprintf("restart marker: %d\n", start_code&0x0f);
- } else if (s->first_picture) {
- /* APP fields */
- if (start_code >= 0xe0 && start_code <= 0xef)
- 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){
- fprintf(stderr, "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;
- }
- for(i=0;i<3;i++) {
- picture->data[i] = s->current_picture[i];
- picture->linesize[i] = (s->interlaced) ?
- s->linesize[i] >> 1 : s->linesize[i];
- }
- *data_size = sizeof(AVFrame);
- avctx->height = s->height;
- if (s->interlaced)
- avctx->height *= 2;
- avctx->width = s->width;
- /* XXX: not complete test ! */
- switch((s->h_count[0] << 4) | s->v_count[0]) {
- case 0x11:
- if(s->rgb){
- avctx->pix_fmt = PIX_FMT_RGBA32;
- }else
- avctx->pix_fmt = PIX_FMT_YUV444P;
- break;
- case 0x21:
- avctx->pix_fmt = PIX_FMT_YUV422P;
- break;
- default:
- case 0x22:
- avctx->pix_fmt = PIX_FMT_YUV420P;
- break;
- }
-
- 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)
- printf("QP: %d\n", (int)picture->quality);
- }
-
- 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:
- printf("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;
- int i;
- 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
-
- for(i=0;i<3;i++) {
- picture->data[i] = s->current_picture[i];
- picture->linesize[i] = (s->interlaced) ?
- s->linesize[i] >> 1 : s->linesize[i];
- }
- *data_size = sizeof(AVFrame);
- avctx->height = s->height;
- if (s->interlaced)
- avctx->height *= 2;
- avctx->width = s->width;
- /* XXX: not complete test ! */
- switch((s->h_count[0] << 4) | s->v_count[0]) {
- case 0x11:
- avctx->pix_fmt = PIX_FMT_YUV444P;
- break;
- case 0x21:
- avctx->pix_fmt = PIX_FMT_YUV422P;
- break;
- default:
- case 0x22:
- avctx->pix_fmt = PIX_FMT_YUV420P;
- break;
- }
-
- 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)
- printf("QP: %f\n", picture->quality);
- }
-
- return buf_ptr - buf;
-}
-
-
-static int mjpeg_decode_end(AVCodecContext *avctx)
-{
- MJpegDecodeContext *s = avctx->priv_data;
- int i, j;
-
- av_free(s->buffer);
- av_free(s->qscale_table);
- for(i=0;i<MAX_COMPONENTS;i++)
- av_free(s->current_picture[i]);
- 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,
- 0,
- NULL
-};
-
-AVCodec mjpegb_decoder = {
- "mjpegb",
- CODEC_TYPE_VIDEO,
- CODEC_ID_MJPEGB,
- sizeof(MJpegDecodeContext),
- mjpeg_decode_init,
- NULL,
- mjpeg_decode_end,
- mjpegb_decode_frame,
- 0,
- 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
projects / synfig.git / blobdiff