From 4922a5b0ee9108e406b8b14356f19851702604d1 Mon Sep 17 00:00:00 2001 From: Aurelien Jacobs Date: Thu, 17 May 2007 16:29:11 +0000 Subject: split mjpeg.c into an encoder and a decoder file Originally committed as revision 9048 to svn://svn.ffmpeg.org/ffmpeg/trunk --- libavcodec/mjpegdec.c | 1700 +++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 1700 insertions(+) create mode 100644 libavcodec/mjpegdec.c (limited to 'libavcodec/mjpegdec.c') diff --git a/libavcodec/mjpegdec.c b/libavcodec/mjpegdec.c new file mode 100644 index 0000000000..b3ced4d5fc --- /dev/null +++ b/libavcodec/mjpegdec.c @@ -0,0 +1,1700 @@ +/* + * MJPEG decoder + * Copyright (c) 2000, 2001 Fabrice Bellard. + * Copyright (c) 2003 Alex Beregszaszi + * Copyright (c) 2003-2004 Michael Niedermayer + * + * This file is part of FFmpeg. + * + * FFmpeg 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 2.1 of the License, or (at your option) any later version. + * + * FFmpeg 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 FFmpeg; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA + * + * Support for external huffman table, various fixes (AVID workaround), + * aspecting, new decode_frame mechanism and apple mjpeg-b support + * by Alex Beregszaszi + */ + +/** + * @file mjpegdec.c + * MJPEG decoder. + */ + +//#define DEBUG +#include + +#include "avcodec.h" +#include "dsputil.h" +#include "bytestream.h" +#include "mjpeg.h" +#include "jpeglsdec.h" + + +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, int use_static, int is_ac) +{ + uint8_t huff_size[256+16]; + uint16_t huff_code[256+16]; + + assert(nb_codes <= 256); + + memset(huff_size, 0, sizeof(huff_size)); + build_huffman_codes(huff_size, huff_code, bits_table, val_table); + + if(is_ac){ + memmove(huff_size+16, huff_size, sizeof(uint8_t)*nb_codes); + memmove(huff_code+16, huff_code, sizeof(uint16_t)*nb_codes); + memset(huff_size, 0, sizeof(uint8_t)*16); + memset(huff_code, 0, sizeof(uint16_t)*16); + nb_codes += 16; + } + + return init_vlc(vlc, 9, nb_codes, huff_size, 1, 1, huff_code, 2, 2, use_static); +} + +static int mjpeg_decode_init(AVCodecContext *avctx) +{ + MJpegDecodeContext *s = avctx->priv_data; + + s->avctx = avctx; + dsputil_init(&s->dsp, avctx); + ff_init_scantable(s->dsp.idct_permutation, &s->scantable, ff_zigzag_direct); + s->buffer_size = 0; + s->buffer = NULL; + s->start_code = -1; + s->first_picture = 1; + s->org_height = avctx->coded_height; + + build_vlc(&s->vlcs[0][0], bits_dc_luminance, val_dc_luminance, 12, 0, 0); + build_vlc(&s->vlcs[0][1], bits_dc_chrominance, val_dc_chrominance, 12, 0, 0); + build_vlc(&s->vlcs[1][0], bits_ac_luminance, val_ac_luminance, 251, 0, 1); + build_vlc(&s->vlcs[1][1], bits_ac_chrominance, val_ac_chrominance, 251, 0, 1); + + 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 */ + } + if (avctx->extradata_size > 9 && + AV_RL32(avctx->extradata + 4) == MKTAG('f','i','e','l')) { + if (avctx->extradata[9] == 6) { /* quicktime icefloe 019 */ + s->interlace_polarity = 1; /* bottom field first */ + av_log(avctx, AV_LOG_DEBUG, "mjpeg bottom field first\n"); + } + } + + 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) + { + av_log(s->avctx, AV_LOG_ERROR, "dqt: 16bit precision\n"); + return -1; + } + index = get_bits(&s->gb, 4); + if (index >= 4) + return -1; + av_log(s->avctx, AV_LOG_DEBUG, "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; + av_log(s->avctx, AV_LOG_DEBUG, "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;igb, 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]); + av_log(s->avctx, AV_LOG_DEBUG, "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, class > 0) < 0){ + return -1; + } + } + return 0; +} + +static int mjpeg_decode_sof(MJpegDecodeContext *s) +{ + int len, nb_components, i, width, height, pix_fmt_id; + + /* 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); + + //HACK for odd_height.mov + if(s->interlaced && s->width == width && s->height == height + 1) + height= s->height; + + av_log(s->avctx, AV_LOG_DEBUG, "sof0: picture: %dx%d\n", width, height); + if(avcodec_check_dimensions(s->avctx, width, height)) + return -1; + + nb_components = get_bits(&s->gb, 8); + if (nb_components <= 0 || + nb_components > MAX_COMPONENTS) + return -1; + if (s->ls && !(s->bits <= 8 || nb_components == 1)){ + av_log(s->avctx, AV_LOG_ERROR, "only <= 8 bits/component or 16-bit gray accepted for JPEG-LS\n"); + return -1; + } + s->nb_components = nb_components; + s->h_max = 1; + s->v_max = 1; + for(i=0;icomponent_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; + av_log(s->avctx, AV_LOG_DEBUG, "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->ls && (s->h_max > 1 || s->v_max > 1)) { + av_log(s->avctx, AV_LOG_ERROR, "Subsampling in JPEG-LS is not supported.\n"); + return -1; + } + + 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->interlaced = 0; + + /* 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; + s->picture.interlaced_frame = 1; + s->picture.top_field_first = !s->interlace_polarity; + height *= 2; + } + + avcodec_set_dimensions(s->avctx, width, height); + + s->qscale_table= av_mallocz((s->width+15)/16); + + s->first_picture = 0; + } + + if(s->interlaced && (s->bottom_field == !s->interlace_polarity)) + return 0; + + /* XXX: not complete test ! */ + pix_fmt_id = (s->h_count[0] << 20) | (s->v_count[0] << 16) | + (s->h_count[1] << 12) | (s->v_count[1] << 8) | + (s->h_count[2] << 4) | s->v_count[2]; + av_log(s->avctx, AV_LOG_DEBUG, "pix fmt id %x\n", pix_fmt_id); + switch(pix_fmt_id){ + case 0x222222: + case 0x111111: + if(s->rgb){ + s->avctx->pix_fmt = PIX_FMT_RGB32; + }else if(s->nb_components==3) + s->avctx->pix_fmt = s->cs_itu601 ? PIX_FMT_YUV444P : PIX_FMT_YUVJ444P; + else + s->avctx->pix_fmt = PIX_FMT_GRAY8; + break; + case 0x211111: + case 0x221212: + s->avctx->pix_fmt = s->cs_itu601 ? PIX_FMT_YUV422P : PIX_FMT_YUVJ422P; + break; + default: + case 0x221111: + s->avctx->pix_fmt = s->cs_itu601 ? PIX_FMT_YUV420P : PIX_FMT_YUVJ420P; + break; + } + if(s->ls){ + if(s->nb_components > 1) + s->avctx->pix_fmt = PIX_FMT_RGB24; + else if(s->bits <= 8) + s->avctx->pix_fmt = PIX_FMT_GRAY8; + else + s->avctx->pix_fmt = PIX_FMT_GRAY16; + } + + 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))) + { + av_log(s->avctx, AV_LOG_DEBUG, "decode_sof0: error, len(%d) mismatch\n", len); + } + + /* totally blank picture as progressive JPEG will only add details to it */ + if(s->progressive){ + memset(s->picture.data[0], 0, s->picture.linesize[0] * s->height); + memset(s->picture.data[1], 0, s->picture.linesize[1] * s->height >> (s->v_max - s->v_count[1])); + memset(s->picture.data[2], 0, s->picture.linesize[2] * s->height >> (s->v_max - s->v_count[2])); + } + 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) + { + av_log(s->avctx, AV_LOG_WARNING, "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, int16_t *quant_matrix) +{ + int code, i, j, level, val; + + /* DC coef */ + val = mjpeg_decode_dc(s, dc_index); + if (val == 0xffff) { + av_log(s->avctx, AV_LOG_ERROR, "error dc\n"); + return -1; + } + val = val * quant_matrix[0] + s->last_dc[component]; + s->last_dc[component] = val; + block[0] = val; + /* AC coefs */ + i = 0; + {OPEN_READER(re, &s->gb) + for(;;) { + UPDATE_CACHE(re, &s->gb); + GET_VLC(code, re, &s->gb, s->vlcs[1][ac_index].table, 9, 2) + + /* EOB */ + if (code == 0x10) + break; + i += ((unsigned)code) >> 4; + if(code != 0x100){ + code &= 0xf; + if(code > MIN_CACHE_BITS - 16){ + UPDATE_CACHE(re, &s->gb) + } + { + int cache=GET_CACHE(re,&s->gb); + int sign=(~cache)>>31; + level = (NEG_USR32(sign ^ cache,code) ^ sign) - sign; + } + + LAST_SKIP_BITS(re, &s->gb, code) + + if (i >= 63) { + if(i == 63){ + j = s->scantable.permutated[63]; + block[j] = level * quant_matrix[j]; + break; + } + av_log(s->avctx, AV_LOG_ERROR, "error count: %d\n", i); + return -1; + } + j = s->scantable.permutated[i]; + block[j] = level * quant_matrix[j]; + } + } + CLOSE_READER(re, &s->gb)} + + return 0; +} + +/* decode block and dequantize - progressive JPEG version */ +static int decode_block_progressive(MJpegDecodeContext *s, DCTELEM *block, + int component, int dc_index, int ac_index, int16_t *quant_matrix, + int ss, int se, int Ah, int Al, int *EOBRUN) +{ + int code, i, j, level, val, run; + + /* DC coef */ + if(!ss){ + val = mjpeg_decode_dc(s, dc_index); + if (val == 0xffff) { + av_log(s->avctx, AV_LOG_ERROR, "error dc\n"); + return -1; + } + val = (val * quant_matrix[0] << Al) + s->last_dc[component]; + }else + val = 0; + s->last_dc[component] = val; + block[0] = val; + if(!se) return 0; + /* AC coefs */ + if(*EOBRUN){ + (*EOBRUN)--; + return 0; + } + {OPEN_READER(re, &s->gb) + for(i=ss;;i++) { + UPDATE_CACHE(re, &s->gb); + GET_VLC(code, re, &s->gb, s->vlcs[1][ac_index].table, 9, 2) + /* Progressive JPEG use AC coeffs from zero and this decoder sets offset 16 by default */ + code -= 16; + if(code & 0xF) { + i += ((unsigned) code) >> 4; + code &= 0xf; + if(code > MIN_CACHE_BITS - 16){ + UPDATE_CACHE(re, &s->gb) + } + { + int cache=GET_CACHE(re,&s->gb); + int sign=(~cache)>>31; + level = (NEG_USR32(sign ^ cache,code) ^ sign) - sign; + } + + LAST_SKIP_BITS(re, &s->gb, code) + + if (i >= se) { + if(i == se){ + j = s->scantable.permutated[se]; + block[j] = level * quant_matrix[j] << Al; + break; + } + av_log(s->avctx, AV_LOG_ERROR, "error count: %d\n", i); + return -1; + } + j = s->scantable.permutated[i]; + block[j] = level * quant_matrix[j] << Al; + }else{ + run = ((unsigned) code) >> 4; + if(run == 0xF){// ZRL - skip 15 coefficients + i += 15; + }else{ + val = run; + run = (1 << run); + UPDATE_CACHE(re, &s->gb); + run += (GET_CACHE(re, &s->gb) >> (32 - val)) & (run - 1); + if(val) + LAST_SKIP_BITS(re, &s->gb, val); + *EOBRUN = run - 1; + break; + } + } + } + CLOSE_READER(re, &s->gb)} + + return 0; +} + +static int ljpeg_decode_rgb_scan(MJpegDecodeContext *s, int predictor, int point_transform){ + int i, mb_x, mb_y; + uint16_t buffer[32768][4]; + int left[3], top[3], topleft[3]; + const int linesize= s->linesize[0]; + const int mask= (1<bits)-1; + + if((unsigned)s->mb_width > 32768) //dynamic alloc + return -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;inb_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; jpicture.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;inb_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; jpicture.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 nb_components, int ss, int se, int Ah, int Al){ + int i, mb_x, mb_y; + int EOBRUN = 0; + + if(Ah) return 0; /* TODO decode refinement planes too */ + 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;inb_blocks[i]; + c = s->comp_index[i]; + h = s->h_scount[i]; + v = s->v_scount[i]; + x = 0; + y = 0; + for(j=0;jblock, 0, sizeof(s->block)); + if (!s->progressive && decode_block(s, s->block, i, + s->dc_index[i], s->ac_index[i], + s->quant_matrixes[ s->quant_index[c] ]) < 0) { + av_log(s->avctx, AV_LOG_ERROR, "error y=%d x=%d\n", mb_y, mb_x); + return -1; + } + if (s->progressive && decode_block_progressive(s, s->block, i, + s->dc_index[i], s->ac_index[i], + s->quant_matrixes[ s->quant_index[c] ], ss, se, Ah, Al, &EOBRUN) < 0) { + av_log(s->avctx, AV_LOG_ERROR, "error y=%d x=%d\n", mb_y, mb_x); + return -1; + } +// av_log(s->avctx, AV_LOG_DEBUG, "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) >> s->avctx->lowres); + if (s->interlaced && s->bottom_field) + ptr += s->linesize[c] >> 1; +//av_log(NULL, AV_LOG_DEBUG, "%d %d %d %d %d %d %d %d \n", mb_x, mb_y, x, y, c, s->bottom_field, (v * mb_y + y) * 8, (h * mb_x + x) * 8); + if(!s->progressive) + s->dsp.idct_put(ptr, s->linesize[c], s->block); + else + s->dsp.idct_add(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; ilast_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; + int ilv, prev_shift; + + /* XXX: verify len field validity */ + len = get_bits(&s->gb, 16); + nb_components = get_bits(&s->gb, 8); + if (len != 6+2*nb_components) + { + av_log(s->avctx, AV_LOG_ERROR, "decode_sos: invalid len (%d)\n", len); + return -1; + } + vmax = 0; + hmax = 0; + for(i=0;igb, 8) - 1; + av_log(s->avctx, AV_LOG_DEBUG, "component: %d\n", id); + /* find component index */ + for(index=0;indexnb_components;index++) + if (id == s->component_id[index]) + break; + if (index == s->nb_components) + { + av_log(s->avctx, AV_LOG_ERROR, "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); /* JPEG Ss / lossless JPEG predictor /JPEG-LS NEAR */ + ilv= get_bits(&s->gb, 8); /* JPEG Se / JPEG-LS ILV */ + prev_shift = get_bits(&s->gb, 4); /* Ah */ + point_transform= get_bits(&s->gb, 4); /* Al */ + + for(i=0;ilast_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 if(!s->ls) { /* skip this for JPEG-LS */ + h = s->h_max / s->h_scount[0]; + v = s->v_max / s->v_scount[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 ilv:%d bits:%d %s\n", s->lossless ? "lossless" : "sequencial DCT", s->rgb ? "RGB" : "", + predictor, point_transform, ilv, s->bits, + s->pegasus_rct ? "PRCT" : (s->rct ? "RCT" : "")); + + + /* mjpeg-b can have padding bytes between sos and image data, skip them */ + for (i = s->mjpb_skiptosod; i > 0; i--) + skip_bits(&s->gb, 8); + + if(s->lossless){ + if(s->ls){ +// for(){ +// reset_ls_coding_parameters(s, 0); + + ff_jpegls_decode_picture(s, predictor, point_transform, ilv); + }else{ + 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, nb_components, predictor, ilv, prev_shift, point_transform) < 0) + return -1; + } + emms_c(); + return 0; + out_of_range: + av_log(s->avctx, AV_LOG_ERROR, "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); + s->restart_count = 0; + av_log(s->avctx, AV_LOG_DEBUG, "restart interval: %d\n", s->restart_interval); + + return 0; +} + +static int mjpeg_decode_app(MJpegDecodeContext *s) +{ + int len, id, i; + + len = get_bits(&s->gb, 16); + if (len < 5) + return -1; + if(8*len + get_bits_count(&s->gb) > s->gb.size_in_bits) + 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"); + i = get_bits(&s->gb, 8); + if (i==2) s->bottom_field= 1; + else if(i==1) s->bottom_field= 0; +#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) +{ + int len = get_bits(&s->gb, 16); + if (len >= 2 && 8*len - 16 + get_bits_count(&s->gb) <= s->gb.size_in_bits) { + char *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"); + } + else if(!strcmp(cbuf, "CS=ITU601")){ + s->cs_itu601= 1; + } + + 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 + av_log(NULL, AV_LOG_VERBOSE, "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; + + 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 { + av_log(avctx, AV_LOG_DEBUG, "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 + FF_INPUT_BUFFER_PADDING_SIZE); + av_log(avctx, AV_LOG_DEBUG, "buffer too small, expanding to %d bytes\n", + s->buffer_size); + } + + /* unescape buffer of SOS, use special treatment for JPEG-LS */ + if (start_code == SOS && !s->ls) + { + uint8_t *src = buf_ptr; + uint8_t *dst = s->buffer; + + while (srccodec_id != CODEC_ID_THP) + { + if (x == 0xff) { + while (src < buf_end && x == 0xff) + x = *(src++); + + if (x >= 0xd0 && x <= 0xd7) + *(dst++) = x; + else if (x) + break; + } + } + } + init_get_bits(&s->gb, s->buffer, (dst - s->buffer)*8); + + av_log(avctx, AV_LOG_DEBUG, "escaping removed %d bytes\n", + (buf_end - buf_ptr) - (dst - s->buffer)); + } + else if(start_code == SOS && s->ls){ + uint8_t *src = buf_ptr; + uint8_t *dst = s->buffer; + int bit_count = 0; + int t = 0, b = 0; + PutBitContext pb; + + s->cur_scan++; + + /* find marker */ + while (src + t < buf_end){ + uint8_t x = src[t++]; + if (x == 0xff){ + while((src + t < buf_end) && x == 0xff) + x = src[t++]; + if (x & 0x80) { + t -= 2; + break; + } + } + } + bit_count = t * 8; + + init_put_bits(&pb, dst, t); + + /* unescape bitstream */ + while(b < t){ + uint8_t x = src[b++]; + put_bits(&pb, 8, x); + if(x == 0xFF){ + x = src[b++]; + put_bits(&pb, 7, x); + bit_count--; + } + } + flush_put_bits(&pb); + + init_get_bits(&s->gb, dst, bit_count); + } + 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(avctx, AV_LOG_DEBUG, "startcode: %X\n", start_code); + } + + /* process markers */ + if (start_code >= 0xd0 && start_code <= 0xd7) { + av_log(avctx, AV_LOG_DEBUG, "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; + + s->restart_count = 0; + /* nothing to do on SOI */ + break; + case DQT: + mjpeg_decode_dqt(s); + break; + case DHT: + if(mjpeg_decode_dht(s) < 0){ + av_log(avctx, AV_LOG_ERROR, "huffman table decode error\n"); + return -1; + } + break; + case SOF0: + s->lossless=0; + s->ls=0; + s->progressive=0; + if (mjpeg_decode_sof(s) < 0) + return -1; + break; + case SOF2: + s->lossless=0; + s->ls=0; + s->progressive=1; + if (mjpeg_decode_sof(s) < 0) + return -1; + break; + case SOF3: + s->lossless=1; + s->ls=0; + s->progressive=0; + if (mjpeg_decode_sof(s) < 0) + return -1; + break; + case SOF48: + s->lossless=1; + s->ls=1; + s->progressive=0; + if (mjpeg_decode_sof(s) < 0) + return -1; + break; + case LSE: + if (ff_jpegls_decode_lse(s) < 0) + return -1; + break; + case EOI: + s->cur_scan = 0; + 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 == !s->interlace_polarity) + 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(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 SOF5: + case SOF6: + case SOF7: + case SOF9: + case SOF10: + case SOF11: + case SOF13: + case SOF14: + case SOF15: + case JPG: + av_log(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; + av_log(avctx, AV_LOG_DEBUG, "marker parser used %d bytes (%d bits)\n", + (get_bits_count(&s->gb)+7)/8, get_bits_count(&s->gb)); + } + } + } +the_end: + av_log(avctx, AV_LOG_DEBUG, "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, sod_offs; + + buf_ptr = buf; + buf_end = buf + buf_size; + +read_header: + /* reset on every SOI */ + s->restart_interval = 0; + s->restart_count = 0; + s->mjpb_skiptosod = 0; + + init_get_bits(&hgb, buf_ptr, /*buf_size*/(buf_end - buf_ptr)*8); + + skip_bits(&hgb, 32); /* reserved zeros */ + + if (get_bits_long(&hgb, 32) != MKBETAG('m','j','p','g')) + { + av_log(avctx, AV_LOG_WARNING, "not mjpeg-b (bad fourcc)\n"); + return 0; + } + + field_size = get_bits_long(&hgb, 32); /* field size */ + av_log(avctx, AV_LOG_DEBUG, "field size: 0x%x\n", field_size); + skip_bits(&hgb, 32); /* padded field size */ + second_field_offs = get_bits_long(&hgb, 32); + av_log(avctx, AV_LOG_DEBUG, "second field offs: 0x%x\n", second_field_offs); + + dqt_offs = get_bits_long(&hgb, 32); + av_log(avctx, AV_LOG_DEBUG, "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_long(&hgb, 32); + av_log(avctx, AV_LOG_DEBUG, "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_long(&hgb, 32); + av_log(avctx, AV_LOG_DEBUG, "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_long(&hgb, 32); + av_log(avctx, AV_LOG_DEBUG, "sos offs: 0x%x\n", sos_offs); + sod_offs = get_bits_long(&hgb, 32); + av_log(avctx, AV_LOG_DEBUG, "sod offs: 0x%x\n", sod_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->mjpb_skiptosod = (sod_offs - sos_offs - show_bits(&s->gb, 16)); + s->start_code = SOS; + mjpeg_decode_sos(s); + } + + 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; + + 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->coded_height >> 8) & 0xFF; + recoded[j+6] = avctx->coded_height & 0xFF; + recoded[j+7] = (avctx->coded_width >> 8) & 0xFF; + recoded[j+8] = avctx->coded_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->coded_width; + s->height = avctx->coded_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 = s->cs_itu601 ? PIX_FMT_YUV420P : PIX_FMT_YUVJ420; + s->interlaced = 0; + + s->picture.reference = 0; + if (avctx->get_buffer(avctx, &s->picture) < 0) + { + av_log(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; + + /* 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); + + for(i=0;i<2;i++) { + for(j=0;j<4;j++) + free_vlc(&s->vlcs[i][j]); + } + return 0; +} + +static int mjpega_dump_header(AVBitStreamFilterContext *bsfc, AVCodecContext *avctx, const char *args, + uint8_t **poutbuf, int *poutbuf_size, + const uint8_t *buf, int buf_size, int keyframe) +{ + uint8_t *poutbufp; + int i; + + if (avctx->codec_id != CODEC_ID_MJPEG) { + av_log(avctx, AV_LOG_ERROR, "mjpega bitstream filter only applies to mjpeg codec\n"); + return 0; + } + + *poutbuf_size = 0; + *poutbuf = av_malloc(buf_size + 44 + FF_INPUT_BUFFER_PADDING_SIZE); + poutbufp = *poutbuf; + bytestream_put_byte(&poutbufp, 0xff); + bytestream_put_byte(&poutbufp, SOI); + bytestream_put_byte(&poutbufp, 0xff); + bytestream_put_byte(&poutbufp, APP1); + bytestream_put_be16(&poutbufp, 42); /* size */ + bytestream_put_be32(&poutbufp, 0); + bytestream_put_buffer(&poutbufp, "mjpg", 4); + bytestream_put_be32(&poutbufp, buf_size + 44); /* field size */ + bytestream_put_be32(&poutbufp, buf_size + 44); /* pad field size */ + bytestream_put_be32(&poutbufp, 0); /* next ptr */ + + for (i = 0; i < buf_size - 1; i++) { + if (buf[i] == 0xff) { + switch (buf[i + 1]) { + case DQT: /* quant off */ + case DHT: /* huff off */ + case SOF0: /* image off */ + bytestream_put_be32(&poutbufp, i + 46); + break; + case SOS: + bytestream_put_be32(&poutbufp, i + 46); /* scan off */ + bytestream_put_be32(&poutbufp, i + 46 + AV_RB16(buf + i + 2)); /* data off */ + bytestream_put_buffer(&poutbufp, buf + 2, buf_size - 2); /* skip already written SOI */ + *poutbuf_size = poutbufp - *poutbuf; + return 1; + case APP1: + if (i + 8 < buf_size && AV_RL32(buf + i + 8) == ff_get_fourcc("mjpg")) { + av_log(avctx, AV_LOG_ERROR, "bitstream already formatted\n"); + memcpy(*poutbuf, buf, buf_size); + *poutbuf_size = buf_size; + return 1; + } + } + } + } + av_freep(poutbuf); + av_log(avctx, AV_LOG_ERROR, "could not find SOS marker in bitstream\n"); + 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 thp_decoder = { + "thp", + CODEC_TYPE_VIDEO, + CODEC_ID_THP, + 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_MJPEGA_DUMP_HEADER_BSF +AVBitStreamFilter mjpega_dump_header_bsf = { + "mjpegadump", + 0, + mjpega_dump_header, +}; +#endif -- cgit v1.2.3