yading@10: /* yading@10: * MPEG4 decoder. yading@10: * Copyright (c) 2000,2001 Fabrice Bellard yading@10: * Copyright (c) 2002-2010 Michael Niedermayer yading@10: * yading@10: * This file is part of FFmpeg. yading@10: * yading@10: * FFmpeg is free software; you can redistribute it and/or yading@10: * modify it under the terms of the GNU Lesser General Public yading@10: * License as published by the Free Software Foundation; either yading@10: * version 2.1 of the License, or (at your option) any later version. yading@10: * yading@10: * FFmpeg is distributed in the hope that it will be useful, yading@10: * but WITHOUT ANY WARRANTY; without even the implied warranty of yading@10: * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU yading@10: * Lesser General Public License for more details. yading@10: * yading@10: * You should have received a copy of the GNU Lesser General Public yading@10: * License along with FFmpeg; if not, write to the Free Software yading@10: * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA yading@10: */ yading@10: yading@10: #define UNCHECKED_BITSTREAM_READER 1 yading@10: yading@10: #include "libavutil/opt.h" yading@10: #include "error_resilience.h" yading@10: #include "internal.h" yading@10: #include "mpegvideo.h" yading@10: #include "mpeg4video.h" yading@10: #include "h263.h" yading@10: #include "thread.h" yading@10: yading@10: // The defines below define the number of bits that are read at once for yading@10: // reading vlc values. Changing these may improve speed and data cache needs yading@10: // be aware though that decreasing them may need the number of stages that is yading@10: // passed to get_vlc* to be increased. yading@10: #define SPRITE_TRAJ_VLC_BITS 6 yading@10: #define DC_VLC_BITS 9 yading@10: #define MB_TYPE_B_VLC_BITS 4 yading@10: yading@10: yading@10: static VLC dc_lum, dc_chrom; yading@10: static VLC sprite_trajectory; yading@10: static VLC mb_type_b_vlc; yading@10: yading@10: static const int mb_type_b_map[4]= { yading@10: MB_TYPE_DIRECT2 | MB_TYPE_L0L1, yading@10: MB_TYPE_L0L1 | MB_TYPE_16x16, yading@10: MB_TYPE_L1 | MB_TYPE_16x16, yading@10: MB_TYPE_L0 | MB_TYPE_16x16, yading@10: }; yading@10: yading@10: /** yading@10: * Predict the ac. yading@10: * @param n block index (0-3 are luma, 4-5 are chroma) yading@10: * @param dir the ac prediction direction yading@10: */ yading@10: void ff_mpeg4_pred_ac(MpegEncContext * s, int16_t *block, int n, yading@10: int dir) yading@10: { yading@10: int i; yading@10: int16_t *ac_val, *ac_val1; yading@10: int8_t * const qscale_table = s->current_picture.qscale_table; yading@10: yading@10: /* find prediction */ yading@10: ac_val = s->ac_val[0][0] + s->block_index[n] * 16; yading@10: ac_val1 = ac_val; yading@10: if (s->ac_pred) { yading@10: if (dir == 0) { yading@10: const int xy= s->mb_x-1 + s->mb_y*s->mb_stride; yading@10: /* left prediction */ yading@10: ac_val -= 16; yading@10: yading@10: if(s->mb_x==0 || s->qscale == qscale_table[xy] || n==1 || n==3){ yading@10: /* same qscale */ yading@10: for(i=1;i<8;i++) { yading@10: block[s->dsp.idct_permutation[i<<3]] += ac_val[i]; yading@10: } yading@10: }else{ yading@10: /* different qscale, we must rescale */ yading@10: for(i=1;i<8;i++) { yading@10: block[s->dsp.idct_permutation[i<<3]] += ROUNDED_DIV(ac_val[i]*qscale_table[xy], s->qscale); yading@10: } yading@10: } yading@10: } else { yading@10: const int xy= s->mb_x + s->mb_y*s->mb_stride - s->mb_stride; yading@10: /* top prediction */ yading@10: ac_val -= 16 * s->block_wrap[n]; yading@10: yading@10: if(s->mb_y==0 || s->qscale == qscale_table[xy] || n==2 || n==3){ yading@10: /* same qscale */ yading@10: for(i=1;i<8;i++) { yading@10: block[s->dsp.idct_permutation[i]] += ac_val[i + 8]; yading@10: } yading@10: }else{ yading@10: /* different qscale, we must rescale */ yading@10: for(i=1;i<8;i++) { yading@10: block[s->dsp.idct_permutation[i]] += ROUNDED_DIV(ac_val[i + 8]*qscale_table[xy], s->qscale); yading@10: } yading@10: } yading@10: } yading@10: } yading@10: /* left copy */ yading@10: for(i=1;i<8;i++) yading@10: ac_val1[i ] = block[s->dsp.idct_permutation[i<<3]]; yading@10: yading@10: /* top copy */ yading@10: for(i=1;i<8;i++) yading@10: ac_val1[8 + i] = block[s->dsp.idct_permutation[i ]]; yading@10: yading@10: } yading@10: yading@10: /** yading@10: * check if the next stuff is a resync marker or the end. yading@10: * @return 0 if not yading@10: */ yading@10: static inline int mpeg4_is_resync(MpegEncContext *s){ yading@10: int bits_count= get_bits_count(&s->gb); yading@10: int v= show_bits(&s->gb, 16); yading@10: yading@10: if(s->workaround_bugs&FF_BUG_NO_PADDING && !s->resync_marker){ yading@10: return 0; yading@10: } yading@10: yading@10: while(v<=0xFF){ yading@10: if(s->pict_type==AV_PICTURE_TYPE_B || (v>>(8-s->pict_type)!=1) || s->partitioned_frame) yading@10: break; yading@10: skip_bits(&s->gb, 8+s->pict_type); yading@10: bits_count+= 8+s->pict_type; yading@10: v= show_bits(&s->gb, 16); yading@10: } yading@10: yading@10: if(bits_count + 8 >= s->gb.size_in_bits){ yading@10: v>>=8; yading@10: v|= 0x7F >> (7-(bits_count&7)); yading@10: yading@10: if(v==0x7F) yading@10: return s->mb_num; yading@10: }else{ yading@10: if(v == ff_mpeg4_resync_prefix[bits_count&7]){ yading@10: int len, mb_num; yading@10: int mb_num_bits= av_log2(s->mb_num - 1) + 1; yading@10: GetBitContext gb= s->gb; yading@10: yading@10: skip_bits(&s->gb, 1); yading@10: align_get_bits(&s->gb); yading@10: yading@10: for(len=0; len<32; len++){ yading@10: if(get_bits1(&s->gb)) break; yading@10: } yading@10: yading@10: mb_num= get_bits(&s->gb, mb_num_bits); yading@10: if(!mb_num || mb_num > s->mb_num || get_bits_count(&s->gb)+6 > s->gb.size_in_bits) yading@10: mb_num= -1; yading@10: yading@10: s->gb= gb; yading@10: yading@10: if(len>=ff_mpeg4_get_video_packet_prefix_length(s)) yading@10: return mb_num; yading@10: } yading@10: } yading@10: return 0; yading@10: } yading@10: yading@10: static int mpeg4_decode_sprite_trajectory(MpegEncContext * s, GetBitContext *gb) yading@10: { yading@10: int i; yading@10: int a= 2<sprite_warping_accuracy; yading@10: int rho= 3-s->sprite_warping_accuracy; yading@10: int r=16/a; yading@10: const int vop_ref[4][2]= {{0,0}, {s->width,0}, {0, s->height}, {s->width, s->height}}; // only true for rectangle shapes yading@10: int d[4][2]={{0,0}, {0,0}, {0,0}, {0,0}}; yading@10: int sprite_ref[4][2]; yading@10: int virtual_ref[2][2]; yading@10: int w2, h2, w3, h3; yading@10: int alpha=0, beta=0; yading@10: int w= s->width; yading@10: int h= s->height; yading@10: int min_ab; yading@10: yading@10: if(w<=0 || h<=0) yading@10: return -1; yading@10: yading@10: for(i=0; inum_sprite_warping_points; i++){ yading@10: int length; yading@10: int x=0, y=0; yading@10: yading@10: length= get_vlc2(gb, sprite_trajectory.table, SPRITE_TRAJ_VLC_BITS, 3); yading@10: if(length){ yading@10: x= get_xbits(gb, length); yading@10: } yading@10: if(!(s->divx_version==500 && s->divx_build==413)) skip_bits1(gb); /* marker bit */ yading@10: yading@10: length= get_vlc2(gb, sprite_trajectory.table, SPRITE_TRAJ_VLC_BITS, 3); yading@10: if(length){ yading@10: y=get_xbits(gb, length); yading@10: } yading@10: skip_bits1(gb); /* marker bit */ yading@10: s->sprite_traj[i][0]= d[i][0]= x; yading@10: s->sprite_traj[i][1]= d[i][1]= y; yading@10: } yading@10: for(; i<4; i++) yading@10: s->sprite_traj[i][0]= s->sprite_traj[i][1]= 0; yading@10: yading@10: while((1<divx_version==500 && s->divx_build==413){ yading@10: sprite_ref[0][0]= a*vop_ref[0][0] + d[0][0]; yading@10: sprite_ref[0][1]= a*vop_ref[0][1] + d[0][1]; yading@10: sprite_ref[1][0]= a*vop_ref[1][0] + d[0][0] + d[1][0]; yading@10: sprite_ref[1][1]= a*vop_ref[1][1] + d[0][1] + d[1][1]; yading@10: sprite_ref[2][0]= a*vop_ref[2][0] + d[0][0] + d[2][0]; yading@10: sprite_ref[2][1]= a*vop_ref[2][1] + d[0][1] + d[2][1]; yading@10: } else { yading@10: sprite_ref[0][0]= (a>>1)*(2*vop_ref[0][0] + d[0][0]); yading@10: sprite_ref[0][1]= (a>>1)*(2*vop_ref[0][1] + d[0][1]); yading@10: sprite_ref[1][0]= (a>>1)*(2*vop_ref[1][0] + d[0][0] + d[1][0]); yading@10: sprite_ref[1][1]= (a>>1)*(2*vop_ref[1][1] + d[0][1] + d[1][1]); yading@10: sprite_ref[2][0]= (a>>1)*(2*vop_ref[2][0] + d[0][0] + d[2][0]); yading@10: sprite_ref[2][1]= (a>>1)*(2*vop_ref[2][1] + d[0][1] + d[2][1]); yading@10: } yading@10: /* sprite_ref[3][0]= (a>>1)*(2*vop_ref[3][0] + d[0][0] + d[1][0] + d[2][0] + d[3][0]); yading@10: sprite_ref[3][1]= (a>>1)*(2*vop_ref[3][1] + d[0][1] + d[1][1] + d[2][1] + d[3][1]); */ yading@10: yading@10: // this is mostly identical to the mpeg4 std (and is totally unreadable because of that ...) yading@10: // perhaps it should be reordered to be more readable ... yading@10: // the idea behind this virtual_ref mess is to be able to use shifts later per pixel instead of divides yading@10: // so the distance between points is converted from w&h based to w2&h2 based which are of the 2^x form yading@10: virtual_ref[0][0]= 16*(vop_ref[0][0] + w2) yading@10: + ROUNDED_DIV(((w - w2)*(r*sprite_ref[0][0] - 16*vop_ref[0][0]) + w2*(r*sprite_ref[1][0] - 16*vop_ref[1][0])),w); yading@10: virtual_ref[0][1]= 16*vop_ref[0][1] yading@10: + ROUNDED_DIV(((w - w2)*(r*sprite_ref[0][1] - 16*vop_ref[0][1]) + w2*(r*sprite_ref[1][1] - 16*vop_ref[1][1])),w); yading@10: virtual_ref[1][0]= 16*vop_ref[0][0] yading@10: + ROUNDED_DIV(((h - h2)*(r*sprite_ref[0][0] - 16*vop_ref[0][0]) + h2*(r*sprite_ref[2][0] - 16*vop_ref[2][0])),h); yading@10: virtual_ref[1][1]= 16*(vop_ref[0][1] + h2) yading@10: + ROUNDED_DIV(((h - h2)*(r*sprite_ref[0][1] - 16*vop_ref[0][1]) + h2*(r*sprite_ref[2][1] - 16*vop_ref[2][1])),h); yading@10: yading@10: switch(s->num_sprite_warping_points) yading@10: { yading@10: case 0: yading@10: s->sprite_offset[0][0]= 0; yading@10: s->sprite_offset[0][1]= 0; yading@10: s->sprite_offset[1][0]= 0; yading@10: s->sprite_offset[1][1]= 0; yading@10: s->sprite_delta[0][0]= a; yading@10: s->sprite_delta[0][1]= 0; yading@10: s->sprite_delta[1][0]= 0; yading@10: s->sprite_delta[1][1]= a; yading@10: s->sprite_shift[0]= 0; yading@10: s->sprite_shift[1]= 0; yading@10: break; yading@10: case 1: //GMC only yading@10: s->sprite_offset[0][0]= sprite_ref[0][0] - a*vop_ref[0][0]; yading@10: s->sprite_offset[0][1]= sprite_ref[0][1] - a*vop_ref[0][1]; yading@10: s->sprite_offset[1][0]= ((sprite_ref[0][0]>>1)|(sprite_ref[0][0]&1)) - a*(vop_ref[0][0]/2); yading@10: s->sprite_offset[1][1]= ((sprite_ref[0][1]>>1)|(sprite_ref[0][1]&1)) - a*(vop_ref[0][1]/2); yading@10: s->sprite_delta[0][0]= a; yading@10: s->sprite_delta[0][1]= 0; yading@10: s->sprite_delta[1][0]= 0; yading@10: s->sprite_delta[1][1]= a; yading@10: s->sprite_shift[0]= 0; yading@10: s->sprite_shift[1]= 0; yading@10: break; yading@10: case 2: yading@10: s->sprite_offset[0][0]= (sprite_ref[0][0]<<(alpha+rho)) yading@10: + (-r*sprite_ref[0][0] + virtual_ref[0][0])*(-vop_ref[0][0]) yading@10: + ( r*sprite_ref[0][1] - virtual_ref[0][1])*(-vop_ref[0][1]) yading@10: + (1<<(alpha+rho-1)); yading@10: s->sprite_offset[0][1]= (sprite_ref[0][1]<<(alpha+rho)) yading@10: + (-r*sprite_ref[0][1] + virtual_ref[0][1])*(-vop_ref[0][0]) yading@10: + (-r*sprite_ref[0][0] + virtual_ref[0][0])*(-vop_ref[0][1]) yading@10: + (1<<(alpha+rho-1)); yading@10: s->sprite_offset[1][0]= ( (-r*sprite_ref[0][0] + virtual_ref[0][0])*(-2*vop_ref[0][0] + 1) yading@10: +( r*sprite_ref[0][1] - virtual_ref[0][1])*(-2*vop_ref[0][1] + 1) yading@10: +2*w2*r*sprite_ref[0][0] yading@10: - 16*w2 yading@10: + (1<<(alpha+rho+1))); yading@10: s->sprite_offset[1][1]= ( (-r*sprite_ref[0][1] + virtual_ref[0][1])*(-2*vop_ref[0][0] + 1) yading@10: +(-r*sprite_ref[0][0] + virtual_ref[0][0])*(-2*vop_ref[0][1] + 1) yading@10: +2*w2*r*sprite_ref[0][1] yading@10: - 16*w2 yading@10: + (1<<(alpha+rho+1))); yading@10: s->sprite_delta[0][0]= (-r*sprite_ref[0][0] + virtual_ref[0][0]); yading@10: s->sprite_delta[0][1]= (+r*sprite_ref[0][1] - virtual_ref[0][1]); yading@10: s->sprite_delta[1][0]= (-r*sprite_ref[0][1] + virtual_ref[0][1]); yading@10: s->sprite_delta[1][1]= (-r*sprite_ref[0][0] + virtual_ref[0][0]); yading@10: yading@10: s->sprite_shift[0]= alpha+rho; yading@10: s->sprite_shift[1]= alpha+rho+2; yading@10: break; yading@10: case 3: yading@10: min_ab= FFMIN(alpha, beta); yading@10: w3= w2>>min_ab; yading@10: h3= h2>>min_ab; yading@10: s->sprite_offset[0][0]= (sprite_ref[0][0]<<(alpha+beta+rho-min_ab)) yading@10: + (-r*sprite_ref[0][0] + virtual_ref[0][0])*h3*(-vop_ref[0][0]) yading@10: + (-r*sprite_ref[0][0] + virtual_ref[1][0])*w3*(-vop_ref[0][1]) yading@10: + (1<<(alpha+beta+rho-min_ab-1)); yading@10: s->sprite_offset[0][1]= (sprite_ref[0][1]<<(alpha+beta+rho-min_ab)) yading@10: + (-r*sprite_ref[0][1] + virtual_ref[0][1])*h3*(-vop_ref[0][0]) yading@10: + (-r*sprite_ref[0][1] + virtual_ref[1][1])*w3*(-vop_ref[0][1]) yading@10: + (1<<(alpha+beta+rho-min_ab-1)); yading@10: s->sprite_offset[1][0]= (-r*sprite_ref[0][0] + virtual_ref[0][0])*h3*(-2*vop_ref[0][0] + 1) yading@10: + (-r*sprite_ref[0][0] + virtual_ref[1][0])*w3*(-2*vop_ref[0][1] + 1) yading@10: + 2*w2*h3*r*sprite_ref[0][0] yading@10: - 16*w2*h3 yading@10: + (1<<(alpha+beta+rho-min_ab+1)); yading@10: s->sprite_offset[1][1]= (-r*sprite_ref[0][1] + virtual_ref[0][1])*h3*(-2*vop_ref[0][0] + 1) yading@10: + (-r*sprite_ref[0][1] + virtual_ref[1][1])*w3*(-2*vop_ref[0][1] + 1) yading@10: + 2*w2*h3*r*sprite_ref[0][1] yading@10: - 16*w2*h3 yading@10: + (1<<(alpha+beta+rho-min_ab+1)); yading@10: s->sprite_delta[0][0]= (-r*sprite_ref[0][0] + virtual_ref[0][0])*h3; yading@10: s->sprite_delta[0][1]= (-r*sprite_ref[0][0] + virtual_ref[1][0])*w3; yading@10: s->sprite_delta[1][0]= (-r*sprite_ref[0][1] + virtual_ref[0][1])*h3; yading@10: s->sprite_delta[1][1]= (-r*sprite_ref[0][1] + virtual_ref[1][1])*w3; yading@10: yading@10: s->sprite_shift[0]= alpha + beta + rho - min_ab; yading@10: s->sprite_shift[1]= alpha + beta + rho - min_ab + 2; yading@10: break; yading@10: } yading@10: /* try to simplify the situation */ yading@10: if( s->sprite_delta[0][0] == a<sprite_shift[0] yading@10: && s->sprite_delta[0][1] == 0 yading@10: && s->sprite_delta[1][0] == 0 yading@10: && s->sprite_delta[1][1] == a<sprite_shift[0]) yading@10: { yading@10: s->sprite_offset[0][0]>>=s->sprite_shift[0]; yading@10: s->sprite_offset[0][1]>>=s->sprite_shift[0]; yading@10: s->sprite_offset[1][0]>>=s->sprite_shift[1]; yading@10: s->sprite_offset[1][1]>>=s->sprite_shift[1]; yading@10: s->sprite_delta[0][0]= a; yading@10: s->sprite_delta[0][1]= 0; yading@10: s->sprite_delta[1][0]= 0; yading@10: s->sprite_delta[1][1]= a; yading@10: s->sprite_shift[0]= 0; yading@10: s->sprite_shift[1]= 0; yading@10: s->real_sprite_warping_points=1; yading@10: } yading@10: else{ yading@10: int shift_y= 16 - s->sprite_shift[0]; yading@10: int shift_c= 16 - s->sprite_shift[1]; yading@10: for(i=0; i<2; i++){ yading@10: s->sprite_offset[0][i]<<= shift_y; yading@10: s->sprite_offset[1][i]<<= shift_c; yading@10: s->sprite_delta[0][i]<<= shift_y; yading@10: s->sprite_delta[1][i]<<= shift_y; yading@10: s->sprite_shift[i]= 16; yading@10: } yading@10: s->real_sprite_warping_points= s->num_sprite_warping_points; yading@10: } yading@10: return 0; yading@10: } yading@10: yading@10: /** yading@10: * Decode the next video packet. yading@10: * @return <0 if something went wrong yading@10: */ yading@10: int ff_mpeg4_decode_video_packet_header(MpegEncContext *s) yading@10: { yading@10: int mb_num_bits= av_log2(s->mb_num - 1) + 1; yading@10: int header_extension=0, mb_num, len; yading@10: yading@10: /* is there enough space left for a video packet + header */ yading@10: if( get_bits_count(&s->gb) > s->gb.size_in_bits-20) return -1; yading@10: yading@10: for(len=0; len<32; len++){ yading@10: if(get_bits1(&s->gb)) break; yading@10: } yading@10: yading@10: if(len!=ff_mpeg4_get_video_packet_prefix_length(s)){ yading@10: av_log(s->avctx, AV_LOG_ERROR, "marker does not match f_code\n"); yading@10: return -1; yading@10: } yading@10: yading@10: if(s->shape != RECT_SHAPE){ yading@10: header_extension= get_bits1(&s->gb); yading@10: //FIXME more stuff here yading@10: } yading@10: yading@10: mb_num= get_bits(&s->gb, mb_num_bits); yading@10: if(mb_num>=s->mb_num){ yading@10: av_log(s->avctx, AV_LOG_ERROR, "illegal mb_num in video packet (%d %d) \n", mb_num, s->mb_num); yading@10: return -1; yading@10: } yading@10: yading@10: s->mb_x= mb_num % s->mb_width; yading@10: s->mb_y= mb_num / s->mb_width; yading@10: yading@10: if(s->shape != BIN_ONLY_SHAPE){ yading@10: int qscale= get_bits(&s->gb, s->quant_precision); yading@10: if(qscale) yading@10: s->chroma_qscale=s->qscale= qscale; yading@10: } yading@10: yading@10: if(s->shape == RECT_SHAPE){ yading@10: header_extension= get_bits1(&s->gb); yading@10: } yading@10: if(header_extension){ yading@10: int time_incr=0; yading@10: yading@10: while (get_bits1(&s->gb) != 0) yading@10: time_incr++; yading@10: yading@10: check_marker(&s->gb, "before time_increment in video packed header"); yading@10: skip_bits(&s->gb, s->time_increment_bits); /* time_increment */ yading@10: check_marker(&s->gb, "before vop_coding_type in video packed header"); yading@10: yading@10: skip_bits(&s->gb, 2); /* vop coding type */ yading@10: //FIXME not rect stuff here yading@10: yading@10: if(s->shape != BIN_ONLY_SHAPE){ yading@10: skip_bits(&s->gb, 3); /* intra dc vlc threshold */ yading@10: //FIXME don't just ignore everything yading@10: if(s->pict_type == AV_PICTURE_TYPE_S && s->vol_sprite_usage==GMC_SPRITE){ yading@10: if(mpeg4_decode_sprite_trajectory(s, &s->gb) < 0) yading@10: return -1; yading@10: av_log(s->avctx, AV_LOG_ERROR, "untested\n"); yading@10: } yading@10: yading@10: //FIXME reduced res stuff here yading@10: yading@10: if (s->pict_type != AV_PICTURE_TYPE_I) { yading@10: int f_code = get_bits(&s->gb, 3); /* fcode_for */ yading@10: if(f_code==0){ yading@10: av_log(s->avctx, AV_LOG_ERROR, "Error, video packet header damaged (f_code=0)\n"); yading@10: } yading@10: } yading@10: if (s->pict_type == AV_PICTURE_TYPE_B) { yading@10: int b_code = get_bits(&s->gb, 3); yading@10: if(b_code==0){ yading@10: av_log(s->avctx, AV_LOG_ERROR, "Error, video packet header damaged (b_code=0)\n"); yading@10: } yading@10: } yading@10: } yading@10: } yading@10: //FIXME new-pred stuff yading@10: yading@10: return 0; yading@10: } yading@10: yading@10: /** yading@10: * Get the average motion vector for a GMC MB. yading@10: * @param n either 0 for the x component or 1 for y yading@10: * @return the average MV for a GMC MB yading@10: */ yading@10: static inline int get_amv(MpegEncContext *s, int n){ yading@10: int x, y, mb_v, sum, dx, dy, shift; yading@10: int len = 1 << (s->f_code + 4); yading@10: const int a= s->sprite_warping_accuracy; yading@10: yading@10: if(s->workaround_bugs & FF_BUG_AMV) yading@10: len >>= s->quarter_sample; yading@10: yading@10: if(s->real_sprite_warping_points==1){ yading@10: if(s->divx_version==500 && s->divx_build==413) yading@10: sum= s->sprite_offset[0][n] / (1<<(a - s->quarter_sample)); yading@10: else yading@10: sum= RSHIFT(s->sprite_offset[0][n]<quarter_sample, a); yading@10: }else{ yading@10: dx= s->sprite_delta[n][0]; yading@10: dy= s->sprite_delta[n][1]; yading@10: shift= s->sprite_shift[0]; yading@10: if(n) dy -= 1<<(shift + a + 1); yading@10: else dx -= 1<<(shift + a + 1); yading@10: mb_v= s->sprite_offset[0][n] + dx*s->mb_x*16 + dy*s->mb_y*16; yading@10: yading@10: sum=0; yading@10: for(y=0; y<16; y++){ yading@10: int v; yading@10: yading@10: v= mb_v + dy*y; yading@10: //XXX FIXME optimize yading@10: for(x=0; x<16; x++){ yading@10: sum+= v>>shift; yading@10: v+= dx; yading@10: } yading@10: } yading@10: sum= RSHIFT(sum, a+8-s->quarter_sample); yading@10: } yading@10: yading@10: if (sum < -len) sum= -len; yading@10: else if (sum >= len) sum= len-1; yading@10: yading@10: return sum; yading@10: } yading@10: yading@10: /** yading@10: * Decode the dc value. yading@10: * @param n block index (0-3 are luma, 4-5 are chroma) yading@10: * @param dir_ptr the prediction direction will be stored here yading@10: * @return the quantized dc yading@10: */ yading@10: static inline int mpeg4_decode_dc(MpegEncContext * s, int n, int *dir_ptr) yading@10: { yading@10: int level, code; yading@10: yading@10: if (n < 4) yading@10: code = get_vlc2(&s->gb, dc_lum.table, DC_VLC_BITS, 1); yading@10: else yading@10: code = get_vlc2(&s->gb, dc_chrom.table, DC_VLC_BITS, 1); yading@10: if (code < 0 || code > 9 /* && s->nbit<9 */){ yading@10: av_log(s->avctx, AV_LOG_ERROR, "illegal dc vlc\n"); yading@10: return -1; yading@10: } yading@10: if (code == 0) { yading@10: level = 0; yading@10: } else { yading@10: if(IS_3IV1){ yading@10: if(code==1) yading@10: level= 2*get_bits1(&s->gb)-1; yading@10: else{ yading@10: if(get_bits1(&s->gb)) yading@10: level = get_bits(&s->gb, code-1) + (1<<(code-1)); yading@10: else yading@10: level = -get_bits(&s->gb, code-1) - (1<<(code-1)); yading@10: } yading@10: }else{ yading@10: level = get_xbits(&s->gb, code); yading@10: } yading@10: yading@10: if (code > 8){ yading@10: if(get_bits1(&s->gb)==0){ /* marker */ yading@10: if(s->err_recognition&(AV_EF_BITSTREAM|AV_EF_COMPLIANT)){ yading@10: av_log(s->avctx, AV_LOG_ERROR, "dc marker bit missing\n"); yading@10: return -1; yading@10: } yading@10: } yading@10: } yading@10: } yading@10: yading@10: return ff_mpeg4_pred_dc(s, n, level, dir_ptr, 0); yading@10: } yading@10: yading@10: /** yading@10: * Decode first partition. yading@10: * @return number of MBs decoded or <0 if an error occurred yading@10: */ yading@10: static int mpeg4_decode_partition_a(MpegEncContext *s){ yading@10: int mb_num; yading@10: static const int8_t quant_tab[4] = { -1, -2, 1, 2 }; yading@10: yading@10: /* decode first partition */ yading@10: mb_num=0; yading@10: s->first_slice_line=1; yading@10: for(; s->mb_ymb_height; s->mb_y++){ yading@10: ff_init_block_index(s); yading@10: for(; s->mb_xmb_width; s->mb_x++){ yading@10: const int xy= s->mb_x + s->mb_y*s->mb_stride; yading@10: int cbpc; yading@10: int dir=0; yading@10: yading@10: mb_num++; yading@10: ff_update_block_index(s); yading@10: if(s->mb_x == s->resync_mb_x && s->mb_y == s->resync_mb_y+1) yading@10: s->first_slice_line=0; yading@10: yading@10: if(s->pict_type==AV_PICTURE_TYPE_I){ yading@10: int i; yading@10: yading@10: do{ yading@10: if(show_bits_long(&s->gb, 19)==DC_MARKER){ yading@10: return mb_num-1; yading@10: } yading@10: yading@10: cbpc = get_vlc2(&s->gb, ff_h263_intra_MCBPC_vlc.table, INTRA_MCBPC_VLC_BITS, 2); yading@10: if (cbpc < 0){ yading@10: av_log(s->avctx, AV_LOG_ERROR, "cbpc corrupted at %d %d\n", s->mb_x, s->mb_y); yading@10: return -1; yading@10: } yading@10: }while(cbpc == 8); yading@10: yading@10: s->cbp_table[xy]= cbpc & 3; yading@10: s->current_picture.mb_type[xy] = MB_TYPE_INTRA; yading@10: s->mb_intra = 1; yading@10: yading@10: if(cbpc & 4) { yading@10: ff_set_qscale(s, s->qscale + quant_tab[get_bits(&s->gb, 2)]); yading@10: } yading@10: s->current_picture.qscale_table[xy]= s->qscale; yading@10: yading@10: s->mbintra_table[xy]= 1; yading@10: for(i=0; i<6; i++){ yading@10: int dc_pred_dir; yading@10: int dc= mpeg4_decode_dc(s, i, &dc_pred_dir); yading@10: if(dc < 0){ yading@10: av_log(s->avctx, AV_LOG_ERROR, "DC corrupted at %d %d\n", s->mb_x, s->mb_y); yading@10: return -1; yading@10: } yading@10: dir<<=1; yading@10: if(dc_pred_dir) dir|=1; yading@10: } yading@10: s->pred_dir_table[xy]= dir; yading@10: }else{ /* P/S_TYPE */ yading@10: int mx, my, pred_x, pred_y, bits; yading@10: int16_t * const mot_val = s->current_picture.motion_val[0][s->block_index[0]]; yading@10: const int stride= s->b8_stride*2; yading@10: yading@10: try_again: yading@10: bits= show_bits(&s->gb, 17); yading@10: if(bits==MOTION_MARKER){ yading@10: return mb_num-1; yading@10: } yading@10: skip_bits1(&s->gb); yading@10: if(bits&0x10000){ yading@10: /* skip mb */ yading@10: if(s->pict_type==AV_PICTURE_TYPE_S && s->vol_sprite_usage==GMC_SPRITE){ yading@10: s->current_picture.mb_type[xy] = MB_TYPE_SKIP | MB_TYPE_16x16 | MB_TYPE_GMC | MB_TYPE_L0; yading@10: mx= get_amv(s, 0); yading@10: my= get_amv(s, 1); yading@10: }else{ yading@10: s->current_picture.mb_type[xy] = MB_TYPE_SKIP | MB_TYPE_16x16 | MB_TYPE_L0; yading@10: mx=my=0; yading@10: } yading@10: mot_val[0 ]= mot_val[2 ]= yading@10: mot_val[0+stride]= mot_val[2+stride]= mx; yading@10: mot_val[1 ]= mot_val[3 ]= yading@10: mot_val[1+stride]= mot_val[3+stride]= my; yading@10: yading@10: if(s->mbintra_table[xy]) yading@10: ff_clean_intra_table_entries(s); yading@10: continue; yading@10: } yading@10: yading@10: cbpc = get_vlc2(&s->gb, ff_h263_inter_MCBPC_vlc.table, INTER_MCBPC_VLC_BITS, 2); yading@10: if (cbpc < 0){ yading@10: av_log(s->avctx, AV_LOG_ERROR, "cbpc corrupted at %d %d\n", s->mb_x, s->mb_y); yading@10: return -1; yading@10: } yading@10: if(cbpc == 20) yading@10: goto try_again; yading@10: yading@10: s->cbp_table[xy]= cbpc&(8+3); //8 is dquant yading@10: yading@10: s->mb_intra = ((cbpc & 4) != 0); yading@10: yading@10: if(s->mb_intra){ yading@10: s->current_picture.mb_type[xy] = MB_TYPE_INTRA; yading@10: s->mbintra_table[xy]= 1; yading@10: mot_val[0 ]= mot_val[2 ]= yading@10: mot_val[0+stride]= mot_val[2+stride]= 0; yading@10: mot_val[1 ]= mot_val[3 ]= yading@10: mot_val[1+stride]= mot_val[3+stride]= 0; yading@10: }else{ yading@10: if(s->mbintra_table[xy]) yading@10: ff_clean_intra_table_entries(s); yading@10: yading@10: if(s->pict_type==AV_PICTURE_TYPE_S && s->vol_sprite_usage==GMC_SPRITE && (cbpc & 16) == 0) yading@10: s->mcsel= get_bits1(&s->gb); yading@10: else s->mcsel= 0; yading@10: yading@10: if ((cbpc & 16) == 0) { yading@10: /* 16x16 motion prediction */ yading@10: yading@10: ff_h263_pred_motion(s, 0, 0, &pred_x, &pred_y); yading@10: if(!s->mcsel){ yading@10: mx = ff_h263_decode_motion(s, pred_x, s->f_code); yading@10: if (mx >= 0xffff) yading@10: return -1; yading@10: yading@10: my = ff_h263_decode_motion(s, pred_y, s->f_code); yading@10: if (my >= 0xffff) yading@10: return -1; yading@10: s->current_picture.mb_type[xy] = MB_TYPE_16x16 | MB_TYPE_L0; yading@10: } else { yading@10: mx = get_amv(s, 0); yading@10: my = get_amv(s, 1); yading@10: s->current_picture.mb_type[xy] = MB_TYPE_16x16 | MB_TYPE_GMC | MB_TYPE_L0; yading@10: } yading@10: yading@10: mot_val[0 ]= mot_val[2 ] = yading@10: mot_val[0+stride]= mot_val[2+stride]= mx; yading@10: mot_val[1 ]= mot_val[3 ]= yading@10: mot_val[1+stride]= mot_val[3+stride]= my; yading@10: } else { yading@10: int i; yading@10: s->current_picture.mb_type[xy] = MB_TYPE_8x8 | MB_TYPE_L0; yading@10: for(i=0;i<4;i++) { yading@10: int16_t *mot_val= ff_h263_pred_motion(s, i, 0, &pred_x, &pred_y); yading@10: mx = ff_h263_decode_motion(s, pred_x, s->f_code); yading@10: if (mx >= 0xffff) yading@10: return -1; yading@10: yading@10: my = ff_h263_decode_motion(s, pred_y, s->f_code); yading@10: if (my >= 0xffff) yading@10: return -1; yading@10: mot_val[0] = mx; yading@10: mot_val[1] = my; yading@10: } yading@10: } yading@10: } yading@10: } yading@10: } yading@10: s->mb_x= 0; yading@10: } yading@10: yading@10: return mb_num; yading@10: } yading@10: yading@10: /** yading@10: * decode second partition. yading@10: * @return <0 if an error occurred yading@10: */ yading@10: static int mpeg4_decode_partition_b(MpegEncContext *s, int mb_count){ yading@10: int mb_num=0; yading@10: static const int8_t quant_tab[4] = { -1, -2, 1, 2 }; yading@10: yading@10: s->mb_x= s->resync_mb_x; yading@10: s->first_slice_line=1; yading@10: for(s->mb_y= s->resync_mb_y; mb_num < mb_count; s->mb_y++){ yading@10: ff_init_block_index(s); yading@10: for(; mb_num < mb_count && s->mb_xmb_width; s->mb_x++){ yading@10: const int xy= s->mb_x + s->mb_y*s->mb_stride; yading@10: yading@10: mb_num++; yading@10: ff_update_block_index(s); yading@10: if(s->mb_x == s->resync_mb_x && s->mb_y == s->resync_mb_y+1) yading@10: s->first_slice_line=0; yading@10: yading@10: if(s->pict_type==AV_PICTURE_TYPE_I){ yading@10: int ac_pred= get_bits1(&s->gb); yading@10: int cbpy = get_vlc2(&s->gb, ff_h263_cbpy_vlc.table, CBPY_VLC_BITS, 1); yading@10: if(cbpy<0){ yading@10: av_log(s->avctx, AV_LOG_ERROR, "cbpy corrupted at %d %d\n", s->mb_x, s->mb_y); yading@10: return -1; yading@10: } yading@10: yading@10: s->cbp_table[xy]|= cbpy<<2; yading@10: s->current_picture.mb_type[xy] |= ac_pred*MB_TYPE_ACPRED; yading@10: }else{ /* P || S_TYPE */ yading@10: if (IS_INTRA(s->current_picture.mb_type[xy])) { yading@10: int dir=0,i; yading@10: int ac_pred = get_bits1(&s->gb); yading@10: int cbpy = get_vlc2(&s->gb, ff_h263_cbpy_vlc.table, CBPY_VLC_BITS, 1); yading@10: yading@10: if(cbpy<0){ yading@10: av_log(s->avctx, AV_LOG_ERROR, "I cbpy corrupted at %d %d\n", s->mb_x, s->mb_y); yading@10: return -1; yading@10: } yading@10: yading@10: if(s->cbp_table[xy] & 8) { yading@10: ff_set_qscale(s, s->qscale + quant_tab[get_bits(&s->gb, 2)]); yading@10: } yading@10: s->current_picture.qscale_table[xy] = s->qscale; yading@10: yading@10: for(i=0; i<6; i++){ yading@10: int dc_pred_dir; yading@10: int dc= mpeg4_decode_dc(s, i, &dc_pred_dir); yading@10: if(dc < 0){ yading@10: av_log(s->avctx, AV_LOG_ERROR, "DC corrupted at %d %d\n", s->mb_x, s->mb_y); yading@10: return -1; yading@10: } yading@10: dir<<=1; yading@10: if(dc_pred_dir) dir|=1; yading@10: } yading@10: s->cbp_table[xy]&= 3; //remove dquant yading@10: s->cbp_table[xy]|= cbpy<<2; yading@10: s->current_picture.mb_type[xy] |= ac_pred*MB_TYPE_ACPRED; yading@10: s->pred_dir_table[xy]= dir; yading@10: } else if (IS_SKIP(s->current_picture.mb_type[xy])) { yading@10: s->current_picture.qscale_table[xy] = s->qscale; yading@10: s->cbp_table[xy]= 0; yading@10: }else{ yading@10: int cbpy = get_vlc2(&s->gb, ff_h263_cbpy_vlc.table, CBPY_VLC_BITS, 1); yading@10: yading@10: if(cbpy<0){ yading@10: av_log(s->avctx, AV_LOG_ERROR, "P cbpy corrupted at %d %d\n", s->mb_x, s->mb_y); yading@10: return -1; yading@10: } yading@10: yading@10: if(s->cbp_table[xy] & 8) { yading@10: ff_set_qscale(s, s->qscale + quant_tab[get_bits(&s->gb, 2)]); yading@10: } yading@10: s->current_picture.qscale_table[xy] = s->qscale; yading@10: yading@10: s->cbp_table[xy]&= 3; //remove dquant yading@10: s->cbp_table[xy]|= (cbpy^0xf)<<2; yading@10: } yading@10: } yading@10: } yading@10: if(mb_num >= mb_count) return 0; yading@10: s->mb_x= 0; yading@10: } yading@10: return 0; yading@10: } yading@10: yading@10: /** yading@10: * Decode the first and second partition. yading@10: * @return <0 if error (and sets error type in the error_status_table) yading@10: */ yading@10: int ff_mpeg4_decode_partitions(MpegEncContext *s) yading@10: { yading@10: int mb_num; yading@10: const int part_a_error= s->pict_type==AV_PICTURE_TYPE_I ? (ER_DC_ERROR|ER_MV_ERROR) : ER_MV_ERROR; yading@10: const int part_a_end = s->pict_type==AV_PICTURE_TYPE_I ? (ER_DC_END |ER_MV_END) : ER_MV_END; yading@10: yading@10: mb_num= mpeg4_decode_partition_a(s); yading@10: if(mb_num<0){ yading@10: ff_er_add_slice(&s->er, s->resync_mb_x, s->resync_mb_y, s->mb_x, s->mb_y, part_a_error); yading@10: return -1; yading@10: } yading@10: yading@10: if(s->resync_mb_x + s->resync_mb_y*s->mb_width + mb_num > s->mb_num){ yading@10: av_log(s->avctx, AV_LOG_ERROR, "slice below monitor ...\n"); yading@10: ff_er_add_slice(&s->er, s->resync_mb_x, s->resync_mb_y, s->mb_x, s->mb_y, part_a_error); yading@10: return -1; yading@10: } yading@10: yading@10: s->mb_num_left= mb_num; yading@10: yading@10: if(s->pict_type==AV_PICTURE_TYPE_I){ yading@10: while(show_bits(&s->gb, 9) == 1) yading@10: skip_bits(&s->gb, 9); yading@10: if(get_bits_long(&s->gb, 19)!=DC_MARKER){ yading@10: av_log(s->avctx, AV_LOG_ERROR, "marker missing after first I partition at %d %d\n", s->mb_x, s->mb_y); yading@10: return -1; yading@10: } yading@10: }else{ yading@10: while(show_bits(&s->gb, 10) == 1) yading@10: skip_bits(&s->gb, 10); yading@10: if(get_bits(&s->gb, 17)!=MOTION_MARKER){ yading@10: av_log(s->avctx, AV_LOG_ERROR, "marker missing after first P partition at %d %d\n", s->mb_x, s->mb_y); yading@10: return -1; yading@10: } yading@10: } yading@10: ff_er_add_slice(&s->er, s->resync_mb_x, s->resync_mb_y, s->mb_x-1, s->mb_y, part_a_end); yading@10: yading@10: if( mpeg4_decode_partition_b(s, mb_num) < 0){ yading@10: if(s->pict_type==AV_PICTURE_TYPE_P) yading@10: ff_er_add_slice(&s->er, s->resync_mb_x, s->resync_mb_y, s->mb_x, s->mb_y, ER_DC_ERROR); yading@10: return -1; yading@10: }else{ yading@10: if(s->pict_type==AV_PICTURE_TYPE_P) yading@10: ff_er_add_slice(&s->er, s->resync_mb_x, s->resync_mb_y, s->mb_x-1, s->mb_y, ER_DC_END); yading@10: } yading@10: yading@10: return 0; yading@10: } yading@10: yading@10: /** yading@10: * Decode a block. yading@10: * @return <0 if an error occurred yading@10: */ yading@10: static inline int mpeg4_decode_block(MpegEncContext * s, int16_t * block, yading@10: int n, int coded, int intra, int rvlc) yading@10: { yading@10: int level, i, last, run; yading@10: int av_uninit(dc_pred_dir); yading@10: RLTable * rl; yading@10: RL_VLC_ELEM * rl_vlc; yading@10: const uint8_t * scan_table; yading@10: int qmul, qadd; yading@10: yading@10: //Note intra & rvlc should be optimized away if this is inlined yading@10: yading@10: if(intra) { yading@10: if(s->use_intra_dc_vlc){ yading@10: /* DC coef */ yading@10: if(s->partitioned_frame){ yading@10: level = s->dc_val[0][ s->block_index[n] ]; yading@10: if(n<4) level= FASTDIV((level + (s->y_dc_scale>>1)), s->y_dc_scale); yading@10: else level= FASTDIV((level + (s->c_dc_scale>>1)), s->c_dc_scale); yading@10: dc_pred_dir= (s->pred_dir_table[s->mb_x + s->mb_y*s->mb_stride]<ac_pred) { yading@10: if (dc_pred_dir == 0) yading@10: scan_table = s->intra_v_scantable.permutated; /* left */ yading@10: else yading@10: scan_table = s->intra_h_scantable.permutated; /* top */ yading@10: } else { yading@10: scan_table = s->intra_scantable.permutated; yading@10: } yading@10: qmul=1; yading@10: qadd=0; yading@10: } else { yading@10: i = -1; yading@10: if (!coded) { yading@10: s->block_last_index[n] = i; yading@10: return 0; yading@10: } yading@10: if(rvlc) rl = &ff_rvlc_rl_inter; yading@10: else rl = &ff_h263_rl_inter; yading@10: yading@10: scan_table = s->intra_scantable.permutated; yading@10: yading@10: if(s->mpeg_quant){ yading@10: qmul=1; yading@10: qadd=0; yading@10: if(rvlc){ yading@10: rl_vlc = ff_rvlc_rl_inter.rl_vlc[0]; yading@10: }else{ yading@10: rl_vlc = ff_h263_rl_inter.rl_vlc[0]; yading@10: } yading@10: }else{ yading@10: qmul = s->qscale << 1; yading@10: qadd = (s->qscale - 1) | 1; yading@10: if(rvlc){ yading@10: rl_vlc = ff_rvlc_rl_inter.rl_vlc[s->qscale]; yading@10: }else{ yading@10: rl_vlc = ff_h263_rl_inter.rl_vlc[s->qscale]; yading@10: } yading@10: } yading@10: } yading@10: { yading@10: OPEN_READER(re, &s->gb); yading@10: for(;;) { yading@10: UPDATE_CACHE(re, &s->gb); yading@10: GET_RL_VLC(level, run, re, &s->gb, rl_vlc, TEX_VLC_BITS, 2, 0); yading@10: if (level==0) { yading@10: /* escape */ yading@10: if(rvlc){ yading@10: if(SHOW_UBITS(re, &s->gb, 1)==0){ yading@10: av_log(s->avctx, AV_LOG_ERROR, "1. marker bit missing in rvlc esc\n"); yading@10: return -1; yading@10: }; SKIP_CACHE(re, &s->gb, 1); yading@10: yading@10: last= SHOW_UBITS(re, &s->gb, 1); SKIP_CACHE(re, &s->gb, 1); yading@10: run= SHOW_UBITS(re, &s->gb, 6); yading@10: SKIP_COUNTER(re, &s->gb, 1+1+6); yading@10: UPDATE_CACHE(re, &s->gb); yading@10: yading@10: if(SHOW_UBITS(re, &s->gb, 1)==0){ yading@10: av_log(s->avctx, AV_LOG_ERROR, "2. marker bit missing in rvlc esc\n"); yading@10: return -1; yading@10: }; SKIP_CACHE(re, &s->gb, 1); yading@10: yading@10: level= SHOW_UBITS(re, &s->gb, 11); SKIP_CACHE(re, &s->gb, 11); yading@10: yading@10: if(SHOW_UBITS(re, &s->gb, 5)!=0x10){ yading@10: av_log(s->avctx, AV_LOG_ERROR, "reverse esc missing\n"); yading@10: return -1; yading@10: }; SKIP_CACHE(re, &s->gb, 5); yading@10: yading@10: level= level * qmul + qadd; yading@10: level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1); yading@10: SKIP_COUNTER(re, &s->gb, 1+11+5+1); yading@10: yading@10: i+= run + 1; yading@10: if(last) i+=192; yading@10: }else{ yading@10: int cache; yading@10: cache= GET_CACHE(re, &s->gb); yading@10: yading@10: if(IS_3IV1) yading@10: cache ^= 0xC0000000; yading@10: yading@10: if (cache&0x80000000) { yading@10: if (cache&0x40000000) { yading@10: /* third escape */ yading@10: SKIP_CACHE(re, &s->gb, 2); yading@10: last= SHOW_UBITS(re, &s->gb, 1); SKIP_CACHE(re, &s->gb, 1); yading@10: run= SHOW_UBITS(re, &s->gb, 6); yading@10: SKIP_COUNTER(re, &s->gb, 2+1+6); yading@10: UPDATE_CACHE(re, &s->gb); yading@10: yading@10: if(IS_3IV1){ yading@10: level= SHOW_SBITS(re, &s->gb, 12); LAST_SKIP_BITS(re, &s->gb, 12); yading@10: }else{ yading@10: if(SHOW_UBITS(re, &s->gb, 1)==0){ yading@10: av_log(s->avctx, AV_LOG_ERROR, "1. marker bit missing in 3. esc\n"); yading@10: return -1; yading@10: }; SKIP_CACHE(re, &s->gb, 1); yading@10: yading@10: level= SHOW_SBITS(re, &s->gb, 12); SKIP_CACHE(re, &s->gb, 12); yading@10: yading@10: if(SHOW_UBITS(re, &s->gb, 1)==0){ yading@10: av_log(s->avctx, AV_LOG_ERROR, "2. marker bit missing in 3. esc\n"); yading@10: return -1; yading@10: } yading@10: yading@10: SKIP_COUNTER(re, &s->gb, 1+12+1); yading@10: } yading@10: yading@10: #if 0 yading@10: if(s->error_recognition >= FF_ER_COMPLIANT){ yading@10: const int abs_level= FFABS(level); yading@10: if(abs_level<=MAX_LEVEL && run<=MAX_RUN){ yading@10: const int run1= run - rl->max_run[last][abs_level] - 1; yading@10: if(abs_level <= rl->max_level[last][run]){ yading@10: av_log(s->avctx, AV_LOG_ERROR, "illegal 3. esc, vlc encoding possible\n"); yading@10: return -1; yading@10: } yading@10: if(s->error_recognition > FF_ER_COMPLIANT){ yading@10: if(abs_level <= rl->max_level[last][run]*2){ yading@10: av_log(s->avctx, AV_LOG_ERROR, "illegal 3. esc, esc 1 encoding possible\n"); yading@10: return -1; yading@10: } yading@10: if(run1 >= 0 && abs_level <= rl->max_level[last][run1]){ yading@10: av_log(s->avctx, AV_LOG_ERROR, "illegal 3. esc, esc 2 encoding possible\n"); yading@10: return -1; yading@10: } yading@10: } yading@10: } yading@10: } yading@10: #endif yading@10: if (level>0) level= level * qmul + qadd; yading@10: else level= level * qmul - qadd; yading@10: yading@10: if((unsigned)(level + 2048) > 4095){ yading@10: if(s->err_recognition & (AV_EF_BITSTREAM|AV_EF_AGGRESSIVE)){ yading@10: if(level > 2560 || level<-2560){ yading@10: av_log(s->avctx, AV_LOG_ERROR, "|level| overflow in 3. esc, qp=%d\n", s->qscale); yading@10: return -1; yading@10: } yading@10: } yading@10: level= level<0 ? -2048 : 2047; yading@10: } yading@10: yading@10: i+= run + 1; yading@10: if(last) i+=192; yading@10: } else { yading@10: /* second escape */ yading@10: SKIP_BITS(re, &s->gb, 2); yading@10: GET_RL_VLC(level, run, re, &s->gb, rl_vlc, TEX_VLC_BITS, 2, 1); yading@10: i+= run + rl->max_run[run>>7][level/qmul] +1; //FIXME opt indexing yading@10: level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1); yading@10: LAST_SKIP_BITS(re, &s->gb, 1); yading@10: } yading@10: } else { yading@10: /* first escape */ yading@10: SKIP_BITS(re, &s->gb, 1); yading@10: GET_RL_VLC(level, run, re, &s->gb, rl_vlc, TEX_VLC_BITS, 2, 1); yading@10: i+= run; yading@10: level = level + rl->max_level[run>>7][(run-1)&63] * qmul;//FIXME opt indexing yading@10: level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1); yading@10: LAST_SKIP_BITS(re, &s->gb, 1); yading@10: } yading@10: } yading@10: } else { yading@10: i+= run; yading@10: level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1); yading@10: LAST_SKIP_BITS(re, &s->gb, 1); yading@10: } yading@10: if (i > 62){ yading@10: i-= 192; yading@10: if(i&(~63)){ yading@10: av_log(s->avctx, AV_LOG_ERROR, "ac-tex damaged at %d %d\n", s->mb_x, s->mb_y); yading@10: return -1; yading@10: } yading@10: yading@10: block[scan_table[i]] = level; yading@10: break; yading@10: } yading@10: yading@10: block[scan_table[i]] = level; yading@10: } yading@10: CLOSE_READER(re, &s->gb); yading@10: } yading@10: not_coded: yading@10: if (intra) { yading@10: if(!s->use_intra_dc_vlc){ yading@10: block[0] = ff_mpeg4_pred_dc(s, n, block[0], &dc_pred_dir, 0); yading@10: yading@10: i -= i>>31; //if(i == -1) i=0; yading@10: } yading@10: yading@10: ff_mpeg4_pred_ac(s, block, n, dc_pred_dir); yading@10: if (s->ac_pred) { yading@10: i = 63; /* XXX: not optimal */ yading@10: } yading@10: } yading@10: s->block_last_index[n] = i; yading@10: return 0; yading@10: } yading@10: yading@10: /** yading@10: * decode partition C of one MB. yading@10: * @return <0 if an error occurred yading@10: */ yading@10: static int mpeg4_decode_partitioned_mb(MpegEncContext *s, int16_t block[6][64]) yading@10: { yading@10: int cbp, mb_type; yading@10: const int xy= s->mb_x + s->mb_y*s->mb_stride; yading@10: yading@10: mb_type = s->current_picture.mb_type[xy]; yading@10: cbp = s->cbp_table[xy]; yading@10: yading@10: s->use_intra_dc_vlc= s->qscale < s->intra_dc_threshold; yading@10: yading@10: if (s->current_picture.qscale_table[xy] != s->qscale) { yading@10: ff_set_qscale(s, s->current_picture.qscale_table[xy]); yading@10: } yading@10: yading@10: if (s->pict_type == AV_PICTURE_TYPE_P || s->pict_type==AV_PICTURE_TYPE_S) { yading@10: int i; yading@10: for(i=0; i<4; i++){ yading@10: s->mv[0][i][0] = s->current_picture.motion_val[0][s->block_index[i]][0]; yading@10: s->mv[0][i][1] = s->current_picture.motion_val[0][s->block_index[i]][1]; yading@10: } yading@10: s->mb_intra = IS_INTRA(mb_type); yading@10: yading@10: if (IS_SKIP(mb_type)) { yading@10: /* skip mb */ yading@10: for(i=0;i<6;i++) yading@10: s->block_last_index[i] = -1; yading@10: s->mv_dir = MV_DIR_FORWARD; yading@10: s->mv_type = MV_TYPE_16X16; yading@10: if(s->pict_type==AV_PICTURE_TYPE_S && s->vol_sprite_usage==GMC_SPRITE){ yading@10: s->mcsel=1; yading@10: s->mb_skipped = 0; yading@10: }else{ yading@10: s->mcsel=0; yading@10: s->mb_skipped = 1; yading@10: } yading@10: }else if(s->mb_intra){ yading@10: s->ac_pred = IS_ACPRED(s->current_picture.mb_type[xy]); yading@10: }else if(!s->mb_intra){ yading@10: // s->mcsel= 0; //FIXME do we need to init that yading@10: yading@10: s->mv_dir = MV_DIR_FORWARD; yading@10: if (IS_8X8(mb_type)) { yading@10: s->mv_type = MV_TYPE_8X8; yading@10: } else { yading@10: s->mv_type = MV_TYPE_16X16; yading@10: } yading@10: } yading@10: } else { /* I-Frame */ yading@10: s->mb_intra = 1; yading@10: s->ac_pred = IS_ACPRED(s->current_picture.mb_type[xy]); yading@10: } yading@10: yading@10: if (!IS_SKIP(mb_type)) { yading@10: int i; yading@10: s->dsp.clear_blocks(s->block[0]); yading@10: /* decode each block */ yading@10: for (i = 0; i < 6; i++) { yading@10: if(mpeg4_decode_block(s, block[i], i, cbp&32, s->mb_intra, s->rvlc) < 0){ yading@10: av_log(s->avctx, AV_LOG_ERROR, "texture corrupted at %d %d %d\n", s->mb_x, s->mb_y, s->mb_intra); yading@10: return -1; yading@10: } yading@10: cbp+=cbp; yading@10: } yading@10: } yading@10: yading@10: /* per-MB end of slice check */ yading@10: yading@10: if(--s->mb_num_left <= 0){ yading@10: if(mpeg4_is_resync(s)) yading@10: return SLICE_END; yading@10: else yading@10: return SLICE_NOEND; yading@10: }else{ yading@10: if(mpeg4_is_resync(s)){ yading@10: const int delta= s->mb_x + 1 == s->mb_width ? 2 : 1; yading@10: if(s->cbp_table[xy+delta]) yading@10: return SLICE_END; yading@10: } yading@10: return SLICE_OK; yading@10: } yading@10: } yading@10: yading@10: static int mpeg4_decode_mb(MpegEncContext *s, yading@10: int16_t block[6][64]) yading@10: { yading@10: int cbpc, cbpy, i, cbp, pred_x, pred_y, mx, my, dquant; yading@10: int16_t *mot_val; yading@10: static int8_t quant_tab[4] = { -1, -2, 1, 2 }; yading@10: const int xy= s->mb_x + s->mb_y * s->mb_stride; yading@10: yading@10: av_assert2(s->h263_pred); yading@10: yading@10: if (s->pict_type == AV_PICTURE_TYPE_P || s->pict_type==AV_PICTURE_TYPE_S) { yading@10: do{ yading@10: if (get_bits1(&s->gb)) { yading@10: /* skip mb */ yading@10: s->mb_intra = 0; yading@10: for(i=0;i<6;i++) yading@10: s->block_last_index[i] = -1; yading@10: s->mv_dir = MV_DIR_FORWARD; yading@10: s->mv_type = MV_TYPE_16X16; yading@10: if(s->pict_type==AV_PICTURE_TYPE_S && s->vol_sprite_usage==GMC_SPRITE){ yading@10: s->current_picture.mb_type[xy] = MB_TYPE_SKIP | MB_TYPE_GMC | MB_TYPE_16x16 | MB_TYPE_L0; yading@10: s->mcsel=1; yading@10: s->mv[0][0][0]= get_amv(s, 0); yading@10: s->mv[0][0][1]= get_amv(s, 1); yading@10: yading@10: s->mb_skipped = 0; yading@10: }else{ yading@10: s->current_picture.mb_type[xy] = MB_TYPE_SKIP | MB_TYPE_16x16 | MB_TYPE_L0; yading@10: s->mcsel=0; yading@10: s->mv[0][0][0] = 0; yading@10: s->mv[0][0][1] = 0; yading@10: s->mb_skipped = 1; yading@10: } yading@10: goto end; yading@10: } yading@10: cbpc = get_vlc2(&s->gb, ff_h263_inter_MCBPC_vlc.table, INTER_MCBPC_VLC_BITS, 2); yading@10: if (cbpc < 0){ yading@10: av_log(s->avctx, AV_LOG_ERROR, "cbpc damaged at %d %d\n", s->mb_x, s->mb_y); yading@10: return -1; yading@10: } yading@10: }while(cbpc == 20); yading@10: yading@10: s->dsp.clear_blocks(s->block[0]); yading@10: dquant = cbpc & 8; yading@10: s->mb_intra = ((cbpc & 4) != 0); yading@10: if (s->mb_intra) goto intra; yading@10: yading@10: if(s->pict_type==AV_PICTURE_TYPE_S && s->vol_sprite_usage==GMC_SPRITE && (cbpc & 16) == 0) yading@10: s->mcsel= get_bits1(&s->gb); yading@10: else s->mcsel= 0; yading@10: cbpy = get_vlc2(&s->gb, ff_h263_cbpy_vlc.table, CBPY_VLC_BITS, 1) ^ 0x0F; yading@10: yading@10: cbp = (cbpc & 3) | (cbpy << 2); yading@10: if (dquant) { yading@10: ff_set_qscale(s, s->qscale + quant_tab[get_bits(&s->gb, 2)]); yading@10: } yading@10: if((!s->progressive_sequence) && (cbp || (s->workaround_bugs&FF_BUG_XVID_ILACE))) yading@10: s->interlaced_dct= get_bits1(&s->gb); yading@10: yading@10: s->mv_dir = MV_DIR_FORWARD; yading@10: if ((cbpc & 16) == 0) { yading@10: if(s->mcsel){ yading@10: s->current_picture.mb_type[xy] = MB_TYPE_GMC | MB_TYPE_16x16 | MB_TYPE_L0; yading@10: /* 16x16 global motion prediction */ yading@10: s->mv_type = MV_TYPE_16X16; yading@10: mx= get_amv(s, 0); yading@10: my= get_amv(s, 1); yading@10: s->mv[0][0][0] = mx; yading@10: s->mv[0][0][1] = my; yading@10: }else if((!s->progressive_sequence) && get_bits1(&s->gb)){ yading@10: s->current_picture.mb_type[xy] = MB_TYPE_16x8 | MB_TYPE_L0 | MB_TYPE_INTERLACED; yading@10: /* 16x8 field motion prediction */ yading@10: s->mv_type= MV_TYPE_FIELD; yading@10: yading@10: s->field_select[0][0]= get_bits1(&s->gb); yading@10: s->field_select[0][1]= get_bits1(&s->gb); yading@10: yading@10: ff_h263_pred_motion(s, 0, 0, &pred_x, &pred_y); yading@10: yading@10: for(i=0; i<2; i++){ yading@10: mx = ff_h263_decode_motion(s, pred_x, s->f_code); yading@10: if (mx >= 0xffff) yading@10: return -1; yading@10: yading@10: my = ff_h263_decode_motion(s, pred_y/2, s->f_code); yading@10: if (my >= 0xffff) yading@10: return -1; yading@10: yading@10: s->mv[0][i][0] = mx; yading@10: s->mv[0][i][1] = my; yading@10: } yading@10: }else{ yading@10: s->current_picture.mb_type[xy] = MB_TYPE_16x16 | MB_TYPE_L0; yading@10: /* 16x16 motion prediction */ yading@10: s->mv_type = MV_TYPE_16X16; yading@10: ff_h263_pred_motion(s, 0, 0, &pred_x, &pred_y); yading@10: mx = ff_h263_decode_motion(s, pred_x, s->f_code); yading@10: yading@10: if (mx >= 0xffff) yading@10: return -1; yading@10: yading@10: my = ff_h263_decode_motion(s, pred_y, s->f_code); yading@10: yading@10: if (my >= 0xffff) yading@10: return -1; yading@10: s->mv[0][0][0] = mx; yading@10: s->mv[0][0][1] = my; yading@10: } yading@10: } else { yading@10: s->current_picture.mb_type[xy] = MB_TYPE_8x8 | MB_TYPE_L0; yading@10: s->mv_type = MV_TYPE_8X8; yading@10: for(i=0;i<4;i++) { yading@10: mot_val = ff_h263_pred_motion(s, i, 0, &pred_x, &pred_y); yading@10: mx = ff_h263_decode_motion(s, pred_x, s->f_code); yading@10: if (mx >= 0xffff) yading@10: return -1; yading@10: yading@10: my = ff_h263_decode_motion(s, pred_y, s->f_code); yading@10: if (my >= 0xffff) yading@10: return -1; yading@10: s->mv[0][i][0] = mx; yading@10: s->mv[0][i][1] = my; yading@10: mot_val[0] = mx; yading@10: mot_val[1] = my; yading@10: } yading@10: } yading@10: } else if(s->pict_type==AV_PICTURE_TYPE_B) { yading@10: int modb1; // first bit of modb yading@10: int modb2; // second bit of modb yading@10: int mb_type; yading@10: yading@10: s->mb_intra = 0; //B-frames never contain intra blocks yading@10: s->mcsel=0; // ... true gmc blocks yading@10: yading@10: if(s->mb_x==0){ yading@10: for(i=0; i<2; i++){ yading@10: s->last_mv[i][0][0]= yading@10: s->last_mv[i][0][1]= yading@10: s->last_mv[i][1][0]= yading@10: s->last_mv[i][1][1]= 0; yading@10: } yading@10: yading@10: ff_thread_await_progress(&s->next_picture_ptr->tf, s->mb_y, 0); yading@10: } yading@10: yading@10: /* if we skipped it in the future P Frame than skip it now too */ yading@10: s->mb_skipped = s->next_picture.mbskip_table[s->mb_y * s->mb_stride + s->mb_x]; // Note, skiptab=0 if last was GMC yading@10: yading@10: if(s->mb_skipped){ yading@10: /* skip mb */ yading@10: for(i=0;i<6;i++) yading@10: s->block_last_index[i] = -1; yading@10: yading@10: s->mv_dir = MV_DIR_FORWARD; yading@10: s->mv_type = MV_TYPE_16X16; yading@10: s->mv[0][0][0] = 0; yading@10: s->mv[0][0][1] = 0; yading@10: s->mv[1][0][0] = 0; yading@10: s->mv[1][0][1] = 0; yading@10: s->current_picture.mb_type[xy] = MB_TYPE_SKIP | MB_TYPE_16x16 | MB_TYPE_L0; yading@10: goto end; yading@10: } yading@10: yading@10: modb1= get_bits1(&s->gb); yading@10: if(modb1){ yading@10: mb_type= MB_TYPE_DIRECT2 | MB_TYPE_SKIP | MB_TYPE_L0L1; //like MB_TYPE_B_DIRECT but no vectors coded yading@10: cbp=0; yading@10: }else{ yading@10: modb2= get_bits1(&s->gb); yading@10: mb_type= get_vlc2(&s->gb, mb_type_b_vlc.table, MB_TYPE_B_VLC_BITS, 1); yading@10: if(mb_type<0){ yading@10: av_log(s->avctx, AV_LOG_ERROR, "illegal MB_type\n"); yading@10: return -1; yading@10: } yading@10: mb_type= mb_type_b_map[ mb_type ]; yading@10: if(modb2) cbp= 0; yading@10: else{ yading@10: s->dsp.clear_blocks(s->block[0]); yading@10: cbp= get_bits(&s->gb, 6); yading@10: } yading@10: yading@10: if ((!IS_DIRECT(mb_type)) && cbp) { yading@10: if(get_bits1(&s->gb)){ yading@10: ff_set_qscale(s, s->qscale + get_bits1(&s->gb)*4 - 2); yading@10: } yading@10: } yading@10: yading@10: if(!s->progressive_sequence){ yading@10: if(cbp) yading@10: s->interlaced_dct= get_bits1(&s->gb); yading@10: yading@10: if(!IS_DIRECT(mb_type) && get_bits1(&s->gb)){ yading@10: mb_type |= MB_TYPE_16x8 | MB_TYPE_INTERLACED; yading@10: mb_type &= ~MB_TYPE_16x16; yading@10: yading@10: if(USES_LIST(mb_type, 0)){ yading@10: s->field_select[0][0]= get_bits1(&s->gb); yading@10: s->field_select[0][1]= get_bits1(&s->gb); yading@10: } yading@10: if(USES_LIST(mb_type, 1)){ yading@10: s->field_select[1][0]= get_bits1(&s->gb); yading@10: s->field_select[1][1]= get_bits1(&s->gb); yading@10: } yading@10: } yading@10: } yading@10: yading@10: s->mv_dir = 0; yading@10: if((mb_type & (MB_TYPE_DIRECT2|MB_TYPE_INTERLACED)) == 0){ yading@10: s->mv_type= MV_TYPE_16X16; yading@10: yading@10: if(USES_LIST(mb_type, 0)){ yading@10: s->mv_dir = MV_DIR_FORWARD; yading@10: yading@10: mx = ff_h263_decode_motion(s, s->last_mv[0][0][0], s->f_code); yading@10: my = ff_h263_decode_motion(s, s->last_mv[0][0][1], s->f_code); yading@10: s->last_mv[0][1][0]= s->last_mv[0][0][0]= s->mv[0][0][0] = mx; yading@10: s->last_mv[0][1][1]= s->last_mv[0][0][1]= s->mv[0][0][1] = my; yading@10: } yading@10: yading@10: if(USES_LIST(mb_type, 1)){ yading@10: s->mv_dir |= MV_DIR_BACKWARD; yading@10: yading@10: mx = ff_h263_decode_motion(s, s->last_mv[1][0][0], s->b_code); yading@10: my = ff_h263_decode_motion(s, s->last_mv[1][0][1], s->b_code); yading@10: s->last_mv[1][1][0]= s->last_mv[1][0][0]= s->mv[1][0][0] = mx; yading@10: s->last_mv[1][1][1]= s->last_mv[1][0][1]= s->mv[1][0][1] = my; yading@10: } yading@10: }else if(!IS_DIRECT(mb_type)){ yading@10: s->mv_type= MV_TYPE_FIELD; yading@10: yading@10: if(USES_LIST(mb_type, 0)){ yading@10: s->mv_dir = MV_DIR_FORWARD; yading@10: yading@10: for(i=0; i<2; i++){ yading@10: mx = ff_h263_decode_motion(s, s->last_mv[0][i][0] , s->f_code); yading@10: my = ff_h263_decode_motion(s, s->last_mv[0][i][1]/2, s->f_code); yading@10: s->last_mv[0][i][0]= s->mv[0][i][0] = mx; yading@10: s->last_mv[0][i][1]= (s->mv[0][i][1] = my)*2; yading@10: } yading@10: } yading@10: yading@10: if(USES_LIST(mb_type, 1)){ yading@10: s->mv_dir |= MV_DIR_BACKWARD; yading@10: yading@10: for(i=0; i<2; i++){ yading@10: mx = ff_h263_decode_motion(s, s->last_mv[1][i][0] , s->b_code); yading@10: my = ff_h263_decode_motion(s, s->last_mv[1][i][1]/2, s->b_code); yading@10: s->last_mv[1][i][0]= s->mv[1][i][0] = mx; yading@10: s->last_mv[1][i][1]= (s->mv[1][i][1] = my)*2; yading@10: } yading@10: } yading@10: } yading@10: } yading@10: yading@10: if(IS_DIRECT(mb_type)){ yading@10: if(IS_SKIP(mb_type)) yading@10: mx=my=0; yading@10: else{ yading@10: mx = ff_h263_decode_motion(s, 0, 1); yading@10: my = ff_h263_decode_motion(s, 0, 1); yading@10: } yading@10: yading@10: s->mv_dir = MV_DIR_FORWARD | MV_DIR_BACKWARD | MV_DIRECT; yading@10: mb_type |= ff_mpeg4_set_direct_mv(s, mx, my); yading@10: } yading@10: s->current_picture.mb_type[xy] = mb_type; yading@10: } else { /* I-Frame */ yading@10: do{ yading@10: cbpc = get_vlc2(&s->gb, ff_h263_intra_MCBPC_vlc.table, INTRA_MCBPC_VLC_BITS, 2); yading@10: if (cbpc < 0){ yading@10: av_log(s->avctx, AV_LOG_ERROR, "I cbpc damaged at %d %d\n", s->mb_x, s->mb_y); yading@10: return -1; yading@10: } yading@10: }while(cbpc == 8); yading@10: yading@10: dquant = cbpc & 4; yading@10: s->mb_intra = 1; yading@10: intra: yading@10: s->ac_pred = get_bits1(&s->gb); yading@10: if(s->ac_pred) yading@10: s->current_picture.mb_type[xy] = MB_TYPE_INTRA | MB_TYPE_ACPRED; yading@10: else yading@10: s->current_picture.mb_type[xy] = MB_TYPE_INTRA; yading@10: yading@10: cbpy = get_vlc2(&s->gb, ff_h263_cbpy_vlc.table, CBPY_VLC_BITS, 1); yading@10: if(cbpy<0){ yading@10: av_log(s->avctx, AV_LOG_ERROR, "I cbpy damaged at %d %d\n", s->mb_x, s->mb_y); yading@10: return -1; yading@10: } yading@10: cbp = (cbpc & 3) | (cbpy << 2); yading@10: yading@10: s->use_intra_dc_vlc= s->qscale < s->intra_dc_threshold; yading@10: yading@10: if (dquant) { yading@10: ff_set_qscale(s, s->qscale + quant_tab[get_bits(&s->gb, 2)]); yading@10: } yading@10: yading@10: if(!s->progressive_sequence) yading@10: s->interlaced_dct= get_bits1(&s->gb); yading@10: yading@10: s->dsp.clear_blocks(s->block[0]); yading@10: /* decode each block */ yading@10: for (i = 0; i < 6; i++) { yading@10: if (mpeg4_decode_block(s, block[i], i, cbp&32, 1, 0) < 0) yading@10: return -1; yading@10: cbp+=cbp; yading@10: } yading@10: goto end; yading@10: } yading@10: yading@10: /* decode each block */ yading@10: for (i = 0; i < 6; i++) { yading@10: if (mpeg4_decode_block(s, block[i], i, cbp&32, 0, 0) < 0) yading@10: return -1; yading@10: cbp+=cbp; yading@10: } yading@10: end: yading@10: yading@10: /* per-MB end of slice check */ yading@10: if(s->codec_id==AV_CODEC_ID_MPEG4){ yading@10: int next= mpeg4_is_resync(s); yading@10: if(next) { yading@10: if (s->mb_x + s->mb_y*s->mb_width + 1 > next && (s->avctx->err_recognition & AV_EF_AGGRESSIVE)) { yading@10: return -1; yading@10: } else if (s->mb_x + s->mb_y*s->mb_width + 1 >= next) yading@10: return SLICE_END; yading@10: yading@10: if(s->pict_type==AV_PICTURE_TYPE_B){ yading@10: const int delta= s->mb_x + 1 == s->mb_width ? 2 : 1; yading@10: ff_thread_await_progress(&s->next_picture_ptr->tf, yading@10: (s->mb_x + delta >= s->mb_width) ? FFMIN(s->mb_y+1, s->mb_height-1) : s->mb_y, 0); yading@10: if (s->next_picture.mbskip_table[xy + delta]) yading@10: return SLICE_OK; yading@10: } yading@10: yading@10: return SLICE_END; yading@10: } yading@10: } yading@10: yading@10: return SLICE_OK; yading@10: } yading@10: yading@10: yading@10: static int mpeg4_decode_gop_header(MpegEncContext * s, GetBitContext *gb){ yading@10: int hours, minutes, seconds; yading@10: yading@10: if(!show_bits(gb, 23)){ yading@10: av_log(s->avctx, AV_LOG_WARNING, "GOP header invalid\n"); yading@10: return -1; yading@10: } yading@10: yading@10: hours= get_bits(gb, 5); yading@10: minutes= get_bits(gb, 6); yading@10: skip_bits1(gb); yading@10: seconds= get_bits(gb, 6); yading@10: yading@10: s->time_base= seconds + 60*(minutes + 60*hours); yading@10: yading@10: skip_bits1(gb); yading@10: skip_bits1(gb); yading@10: yading@10: return 0; yading@10: } yading@10: yading@10: static int mpeg4_decode_profile_level(MpegEncContext * s, GetBitContext *gb){ yading@10: yading@10: s->avctx->profile = get_bits(gb, 4); yading@10: s->avctx->level = get_bits(gb, 4); yading@10: yading@10: // for Simple profile, level 0 yading@10: if (s->avctx->profile == 0 && s->avctx->level == 8) { yading@10: s->avctx->level = 0; yading@10: } yading@10: yading@10: return 0; yading@10: } yading@10: yading@10: static int decode_vol_header(MpegEncContext *s, GetBitContext *gb){ yading@10: int width, height, vo_ver_id; yading@10: yading@10: /* vol header */ yading@10: skip_bits(gb, 1); /* random access */ yading@10: s->vo_type= get_bits(gb, 8); yading@10: if (get_bits1(gb) != 0) { /* is_ol_id */ yading@10: vo_ver_id = get_bits(gb, 4); /* vo_ver_id */ yading@10: skip_bits(gb, 3); /* vo_priority */ yading@10: } else { yading@10: vo_ver_id = 1; yading@10: } yading@10: s->aspect_ratio_info= get_bits(gb, 4); yading@10: if(s->aspect_ratio_info == FF_ASPECT_EXTENDED){ yading@10: s->avctx->sample_aspect_ratio.num= get_bits(gb, 8); // par_width yading@10: s->avctx->sample_aspect_ratio.den= get_bits(gb, 8); // par_height yading@10: }else{ yading@10: s->avctx->sample_aspect_ratio= ff_h263_pixel_aspect[s->aspect_ratio_info]; yading@10: } yading@10: yading@10: if ((s->vol_control_parameters=get_bits1(gb))) { /* vol control parameter */ yading@10: int chroma_format= get_bits(gb, 2); yading@10: if(chroma_format!=CHROMA_420){ yading@10: av_log(s->avctx, AV_LOG_ERROR, "illegal chroma format\n"); yading@10: } yading@10: s->low_delay= get_bits1(gb); yading@10: if(get_bits1(gb)){ /* vbv parameters */ yading@10: get_bits(gb, 15); /* first_half_bitrate */ yading@10: skip_bits1(gb); /* marker */ yading@10: get_bits(gb, 15); /* latter_half_bitrate */ yading@10: skip_bits1(gb); /* marker */ yading@10: get_bits(gb, 15); /* first_half_vbv_buffer_size */ yading@10: skip_bits1(gb); /* marker */ yading@10: get_bits(gb, 3); /* latter_half_vbv_buffer_size */ yading@10: get_bits(gb, 11); /* first_half_vbv_occupancy */ yading@10: skip_bits1(gb); /* marker */ yading@10: get_bits(gb, 15); /* latter_half_vbv_occupancy */ yading@10: skip_bits1(gb); /* marker */ yading@10: } yading@10: }else{ yading@10: // set low delay flag only once the smartest? low delay detection won't be overridden yading@10: if(s->picture_number==0) yading@10: s->low_delay=0; yading@10: } yading@10: yading@10: s->shape = get_bits(gb, 2); /* vol shape */ yading@10: if(s->shape != RECT_SHAPE) av_log(s->avctx, AV_LOG_ERROR, "only rectangular vol supported\n"); yading@10: if(s->shape == GRAY_SHAPE && vo_ver_id != 1){ yading@10: av_log(s->avctx, AV_LOG_ERROR, "Gray shape not supported\n"); yading@10: skip_bits(gb, 4); //video_object_layer_shape_extension yading@10: } yading@10: yading@10: check_marker(gb, "before time_increment_resolution"); yading@10: yading@10: s->avctx->time_base.den = get_bits(gb, 16); yading@10: if(!s->avctx->time_base.den){ yading@10: av_log(s->avctx, AV_LOG_ERROR, "time_base.den==0\n"); yading@10: s->avctx->time_base.num = 0; yading@10: return -1; yading@10: } yading@10: yading@10: s->time_increment_bits = av_log2(s->avctx->time_base.den - 1) + 1; yading@10: if (s->time_increment_bits < 1) yading@10: s->time_increment_bits = 1; yading@10: yading@10: check_marker(gb, "before fixed_vop_rate"); yading@10: yading@10: if (get_bits1(gb) != 0) { /* fixed_vop_rate */ yading@10: s->avctx->time_base.num = get_bits(gb, s->time_increment_bits); yading@10: }else yading@10: s->avctx->time_base.num = 1; yading@10: yading@10: s->t_frame=0; yading@10: yading@10: if (s->shape != BIN_ONLY_SHAPE) { yading@10: if (s->shape == RECT_SHAPE) { yading@10: skip_bits1(gb); /* marker */ yading@10: width = get_bits(gb, 13); yading@10: skip_bits1(gb); /* marker */ yading@10: height = get_bits(gb, 13); yading@10: skip_bits1(gb); /* marker */ yading@10: if(width && height && !(s->width && s->codec_tag == AV_RL32("MP4S"))){ /* they should be non zero but who knows ... */ yading@10: if (s->width && s->height && yading@10: (s->width != width || s->height != height)) yading@10: s->context_reinit = 1; yading@10: s->width = width; yading@10: s->height = height; yading@10: } yading@10: } yading@10: yading@10: s->progressive_sequence= yading@10: s->progressive_frame= get_bits1(gb)^1; yading@10: s->interlaced_dct=0; yading@10: if(!get_bits1(gb) && (s->avctx->debug & FF_DEBUG_PICT_INFO)) yading@10: av_log(s->avctx, AV_LOG_INFO, "MPEG4 OBMC not supported (very likely buggy encoder)\n"); /* OBMC Disable */ yading@10: if (vo_ver_id == 1) { yading@10: s->vol_sprite_usage = get_bits1(gb); /* vol_sprite_usage */ yading@10: } else { yading@10: s->vol_sprite_usage = get_bits(gb, 2); /* vol_sprite_usage */ yading@10: } yading@10: if(s->vol_sprite_usage==STATIC_SPRITE) av_log(s->avctx, AV_LOG_ERROR, "Static Sprites not supported\n"); yading@10: if(s->vol_sprite_usage==STATIC_SPRITE || s->vol_sprite_usage==GMC_SPRITE){ yading@10: if(s->vol_sprite_usage==STATIC_SPRITE){ yading@10: s->sprite_width = get_bits(gb, 13); yading@10: skip_bits1(gb); /* marker */ yading@10: s->sprite_height= get_bits(gb, 13); yading@10: skip_bits1(gb); /* marker */ yading@10: s->sprite_left = get_bits(gb, 13); yading@10: skip_bits1(gb); /* marker */ yading@10: s->sprite_top = get_bits(gb, 13); yading@10: skip_bits1(gb); /* marker */ yading@10: } yading@10: s->num_sprite_warping_points= get_bits(gb, 6); yading@10: if(s->num_sprite_warping_points > 3){ yading@10: av_log(s->avctx, AV_LOG_ERROR, "%d sprite_warping_points\n", s->num_sprite_warping_points); yading@10: s->num_sprite_warping_points= 0; yading@10: return -1; yading@10: } yading@10: s->sprite_warping_accuracy = get_bits(gb, 2); yading@10: s->sprite_brightness_change= get_bits1(gb); yading@10: if(s->vol_sprite_usage==STATIC_SPRITE) yading@10: s->low_latency_sprite= get_bits1(gb); yading@10: } yading@10: // FIXME sadct disable bit if verid!=1 && shape not rect yading@10: yading@10: if (get_bits1(gb) == 1) { /* not_8_bit */ yading@10: s->quant_precision = get_bits(gb, 4); /* quant_precision */ yading@10: if(get_bits(gb, 4)!=8) av_log(s->avctx, AV_LOG_ERROR, "N-bit not supported\n"); /* bits_per_pixel */ yading@10: if(s->quant_precision!=5) av_log(s->avctx, AV_LOG_ERROR, "quant precision %d\n", s->quant_precision); yading@10: if(s->quant_precision<3 || s->quant_precision>9) { yading@10: s->quant_precision = 5; yading@10: } yading@10: } else { yading@10: s->quant_precision = 5; yading@10: } yading@10: yading@10: // FIXME a bunch of grayscale shape things yading@10: yading@10: if((s->mpeg_quant=get_bits1(gb))){ /* vol_quant_type */ yading@10: int i, v; yading@10: yading@10: /* load default matrixes */ yading@10: for(i=0; i<64; i++){ yading@10: int j= s->dsp.idct_permutation[i]; yading@10: v= ff_mpeg4_default_intra_matrix[i]; yading@10: s->intra_matrix[j]= v; yading@10: s->chroma_intra_matrix[j]= v; yading@10: yading@10: v= ff_mpeg4_default_non_intra_matrix[i]; yading@10: s->inter_matrix[j]= v; yading@10: s->chroma_inter_matrix[j]= v; yading@10: } yading@10: yading@10: /* load custom intra matrix */ yading@10: if(get_bits1(gb)){ yading@10: int last=0; yading@10: for(i=0; i<64; i++){ yading@10: int j; yading@10: v= get_bits(gb, 8); yading@10: if(v==0) break; yading@10: yading@10: last= v; yading@10: j= s->dsp.idct_permutation[ ff_zigzag_direct[i] ]; yading@10: s->intra_matrix[j]= v; yading@10: s->chroma_intra_matrix[j]= v; yading@10: } yading@10: yading@10: /* replicate last value */ yading@10: for(; i<64; i++){ yading@10: int j= s->dsp.idct_permutation[ ff_zigzag_direct[i] ]; yading@10: s->intra_matrix[j]= last; yading@10: s->chroma_intra_matrix[j]= last; yading@10: } yading@10: } yading@10: yading@10: /* load custom non intra matrix */ yading@10: if(get_bits1(gb)){ yading@10: int last=0; yading@10: for(i=0; i<64; i++){ yading@10: int j; yading@10: v= get_bits(gb, 8); yading@10: if(v==0) break; yading@10: yading@10: last= v; yading@10: j= s->dsp.idct_permutation[ ff_zigzag_direct[i] ]; yading@10: s->inter_matrix[j]= v; yading@10: s->chroma_inter_matrix[j]= v; yading@10: } yading@10: yading@10: /* replicate last value */ yading@10: for(; i<64; i++){ yading@10: int j= s->dsp.idct_permutation[ ff_zigzag_direct[i] ]; yading@10: s->inter_matrix[j]= last; yading@10: s->chroma_inter_matrix[j]= last; yading@10: } yading@10: } yading@10: yading@10: // FIXME a bunch of grayscale shape things yading@10: } yading@10: yading@10: if(vo_ver_id != 1) yading@10: s->quarter_sample= get_bits1(gb); yading@10: else s->quarter_sample=0; yading@10: yading@10: if(!get_bits1(gb)){ yading@10: int pos= get_bits_count(gb); yading@10: int estimation_method= get_bits(gb, 2); yading@10: if(estimation_method<2){ yading@10: if(!get_bits1(gb)){ yading@10: s->cplx_estimation_trash_i += 8*get_bits1(gb); //opaque yading@10: s->cplx_estimation_trash_i += 8*get_bits1(gb); //transparent yading@10: s->cplx_estimation_trash_i += 8*get_bits1(gb); //intra_cae yading@10: s->cplx_estimation_trash_i += 8*get_bits1(gb); //inter_cae yading@10: s->cplx_estimation_trash_i += 8*get_bits1(gb); //no_update yading@10: s->cplx_estimation_trash_i += 8*get_bits1(gb); //upampling yading@10: } yading@10: if(!get_bits1(gb)){ yading@10: s->cplx_estimation_trash_i += 8*get_bits1(gb); //intra_blocks yading@10: s->cplx_estimation_trash_p += 8*get_bits1(gb); //inter_blocks yading@10: s->cplx_estimation_trash_p += 8*get_bits1(gb); //inter4v_blocks yading@10: s->cplx_estimation_trash_i += 8*get_bits1(gb); //not coded blocks yading@10: } yading@10: if(!check_marker(gb, "in complexity estimation part 1")){ yading@10: skip_bits_long(gb, pos - get_bits_count(gb)); yading@10: goto no_cplx_est; yading@10: } yading@10: if(!get_bits1(gb)){ yading@10: s->cplx_estimation_trash_i += 8*get_bits1(gb); //dct_coeffs yading@10: s->cplx_estimation_trash_i += 8*get_bits1(gb); //dct_lines yading@10: s->cplx_estimation_trash_i += 8*get_bits1(gb); //vlc_syms yading@10: s->cplx_estimation_trash_i += 4*get_bits1(gb); //vlc_bits yading@10: } yading@10: if(!get_bits1(gb)){ yading@10: s->cplx_estimation_trash_p += 8*get_bits1(gb); //apm yading@10: s->cplx_estimation_trash_p += 8*get_bits1(gb); //npm yading@10: s->cplx_estimation_trash_b += 8*get_bits1(gb); //interpolate_mc_q yading@10: s->cplx_estimation_trash_p += 8*get_bits1(gb); //forwback_mc_q yading@10: s->cplx_estimation_trash_p += 8*get_bits1(gb); //halfpel2 yading@10: s->cplx_estimation_trash_p += 8*get_bits1(gb); //halfpel4 yading@10: } yading@10: if(!check_marker(gb, "in complexity estimation part 2")){ yading@10: skip_bits_long(gb, pos - get_bits_count(gb)); yading@10: goto no_cplx_est; yading@10: } yading@10: if(estimation_method==1){ yading@10: s->cplx_estimation_trash_i += 8*get_bits1(gb); //sadct yading@10: s->cplx_estimation_trash_p += 8*get_bits1(gb); //qpel yading@10: } yading@10: }else yading@10: av_log(s->avctx, AV_LOG_ERROR, "Invalid Complexity estimation method %d\n", estimation_method); yading@10: }else{ yading@10: no_cplx_est: yading@10: s->cplx_estimation_trash_i= yading@10: s->cplx_estimation_trash_p= yading@10: s->cplx_estimation_trash_b= 0; yading@10: } yading@10: yading@10: s->resync_marker= !get_bits1(gb); /* resync_marker_disabled */ yading@10: yading@10: s->data_partitioning= get_bits1(gb); yading@10: if(s->data_partitioning){ yading@10: s->rvlc= get_bits1(gb); yading@10: } yading@10: yading@10: if(vo_ver_id != 1) { yading@10: s->new_pred= get_bits1(gb); yading@10: if(s->new_pred){ yading@10: av_log(s->avctx, AV_LOG_ERROR, "new pred not supported\n"); yading@10: skip_bits(gb, 2); /* requested upstream message type */ yading@10: skip_bits1(gb); /* newpred segment type */ yading@10: } yading@10: s->reduced_res_vop= get_bits1(gb); yading@10: if(s->reduced_res_vop) av_log(s->avctx, AV_LOG_ERROR, "reduced resolution VOP not supported\n"); yading@10: } yading@10: else{ yading@10: s->new_pred=0; yading@10: s->reduced_res_vop= 0; yading@10: } yading@10: yading@10: s->scalability= get_bits1(gb); yading@10: yading@10: if (s->scalability) { yading@10: GetBitContext bak= *gb; yading@10: int h_sampling_factor_n; yading@10: int h_sampling_factor_m; yading@10: int v_sampling_factor_n; yading@10: int v_sampling_factor_m; yading@10: yading@10: s->hierachy_type= get_bits1(gb); yading@10: skip_bits(gb, 4); /* ref_layer_id */ yading@10: skip_bits1(gb); /* ref_layer_sampling_dir */ yading@10: h_sampling_factor_n= get_bits(gb, 5); yading@10: h_sampling_factor_m= get_bits(gb, 5); yading@10: v_sampling_factor_n= get_bits(gb, 5); yading@10: v_sampling_factor_m= get_bits(gb, 5); yading@10: s->enhancement_type= get_bits1(gb); yading@10: yading@10: if( h_sampling_factor_n==0 || h_sampling_factor_m==0 yading@10: || v_sampling_factor_n==0 || v_sampling_factor_m==0){ yading@10: /* illegal scalability header (VERY broken encoder), yading@10: * trying to workaround */ yading@10: s->scalability=0; yading@10: *gb= bak; yading@10: }else yading@10: av_log(s->avctx, AV_LOG_ERROR, "scalability not supported\n"); yading@10: yading@10: // bin shape stuff FIXME yading@10: } yading@10: } yading@10: yading@10: if(s->avctx->debug&FF_DEBUG_PICT_INFO) { yading@10: av_log(s->avctx, AV_LOG_DEBUG, "tb %d/%d, tincrbits:%d, qp_prec:%d, ps:%d, %s%s%s%s\n", yading@10: s->avctx->time_base.num, s->avctx->time_base.den, yading@10: s->time_increment_bits, yading@10: s->quant_precision, yading@10: s->progressive_sequence, yading@10: s->scalability ? "scalability " :"" , s->quarter_sample ? "qpel " : "", yading@10: s->data_partitioning ? "partition " : "", s->rvlc ? "rvlc " : "" yading@10: ); yading@10: } yading@10: yading@10: return 0; yading@10: } yading@10: yading@10: /** yading@10: * Decode the user data stuff in the header. yading@10: * Also initializes divx/xvid/lavc_version/build. yading@10: */ yading@10: static int decode_user_data(MpegEncContext *s, GetBitContext *gb){ yading@10: char buf[256]; yading@10: int i; yading@10: int e; yading@10: int ver = 0, build = 0, ver2 = 0, ver3 = 0; yading@10: char last; yading@10: yading@10: for(i=0; i<255 && get_bits_count(gb) < gb->size_in_bits; i++){ yading@10: if(show_bits(gb, 23) == 0) break; yading@10: buf[i]= get_bits(gb, 8); yading@10: } yading@10: buf[i]=0; yading@10: yading@10: /* divx detection */ yading@10: e=sscanf(buf, "DivX%dBuild%d%c", &ver, &build, &last); yading@10: if(e<2) yading@10: e=sscanf(buf, "DivX%db%d%c", &ver, &build, &last); yading@10: if(e>=2){ yading@10: s->divx_version= ver; yading@10: s->divx_build= build; yading@10: s->divx_packed= e==3 && last=='p'; yading@10: if(s->divx_packed && !s->showed_packed_warning) { yading@10: av_log(s->avctx, AV_LOG_WARNING, "Invalid and inefficient vfw-avi packed B frames detected\n"); yading@10: s->showed_packed_warning=1; yading@10: } yading@10: } yading@10: yading@10: /* libavcodec detection */ yading@10: e=sscanf(buf, "FFmpe%*[^b]b%d", &build)+3; yading@10: if(e!=4) yading@10: e=sscanf(buf, "FFmpeg v%d.%d.%d / libavcodec build: %d", &ver, &ver2, &ver3, &build); yading@10: if(e!=4){ yading@10: e=sscanf(buf, "Lavc%d.%d.%d", &ver, &ver2, &ver3)+1; yading@10: if (e>1) yading@10: build= (ver<<16) + (ver2<<8) + ver3; yading@10: } yading@10: if(e!=4){ yading@10: if(strcmp(buf, "ffmpeg")==0){ yading@10: s->lavc_build= 4600; yading@10: } yading@10: } yading@10: if(e==4){ yading@10: s->lavc_build= build; yading@10: } yading@10: yading@10: /* Xvid detection */ yading@10: e=sscanf(buf, "XviD%d", &build); yading@10: if(e==1){ yading@10: s->xvid_build= build; yading@10: } yading@10: yading@10: return 0; yading@10: } yading@10: yading@10: static int decode_vop_header(MpegEncContext *s, GetBitContext *gb){ yading@10: int time_incr, time_increment; yading@10: yading@10: s->pict_type = get_bits(gb, 2) + AV_PICTURE_TYPE_I; /* pict type: I = 0 , P = 1 */ yading@10: if(s->pict_type==AV_PICTURE_TYPE_B && s->low_delay && s->vol_control_parameters==0 && !(s->flags & CODEC_FLAG_LOW_DELAY)){ yading@10: av_log(s->avctx, AV_LOG_ERROR, "low_delay flag incorrectly, clearing it\n"); yading@10: s->low_delay=0; yading@10: } yading@10: yading@10: s->partitioned_frame= s->data_partitioning && s->pict_type!=AV_PICTURE_TYPE_B; yading@10: if(s->partitioned_frame) yading@10: s->decode_mb= mpeg4_decode_partitioned_mb; yading@10: else yading@10: s->decode_mb= mpeg4_decode_mb; yading@10: yading@10: time_incr=0; yading@10: while (get_bits1(gb) != 0) yading@10: time_incr++; yading@10: yading@10: check_marker(gb, "before time_increment"); yading@10: yading@10: if(s->time_increment_bits==0 || !(show_bits(gb, s->time_increment_bits+1)&1)){ yading@10: av_log(s->avctx, AV_LOG_ERROR, "hmm, seems the headers are not complete, trying to guess time_increment_bits\n"); yading@10: yading@10: for(s->time_increment_bits=1 ;s->time_increment_bits<16; s->time_increment_bits++){ yading@10: if ( s->pict_type == AV_PICTURE_TYPE_P yading@10: || (s->pict_type == AV_PICTURE_TYPE_S && s->vol_sprite_usage==GMC_SPRITE)) { yading@10: if((show_bits(gb, s->time_increment_bits+6)&0x37) == 0x30) break; yading@10: }else yading@10: if((show_bits(gb, s->time_increment_bits+5)&0x1F) == 0x18) break; yading@10: } yading@10: yading@10: av_log(s->avctx, AV_LOG_ERROR, "my guess is %d bits ;)\n",s->time_increment_bits); yading@10: if (s->avctx->time_base.den && 4*s->avctx->time_base.den < 1<time_increment_bits) { yading@10: s->avctx->time_base.den = 1<time_increment_bits; yading@10: } yading@10: } yading@10: yading@10: if(IS_3IV1) time_increment= get_bits1(gb); //FIXME investigate further yading@10: else time_increment= get_bits(gb, s->time_increment_bits); yading@10: yading@10: if(s->pict_type!=AV_PICTURE_TYPE_B){ yading@10: s->last_time_base= s->time_base; yading@10: s->time_base+= time_incr; yading@10: s->time= s->time_base*s->avctx->time_base.den + time_increment; yading@10: if(s->workaround_bugs&FF_BUG_UMP4){ yading@10: if(s->time < s->last_non_b_time){ yading@10: /* header is not mpeg-4-compatible, broken encoder, yading@10: * trying to workaround */ yading@10: s->time_base++; yading@10: s->time+= s->avctx->time_base.den; yading@10: } yading@10: } yading@10: s->pp_time= s->time - s->last_non_b_time; yading@10: s->last_non_b_time= s->time; yading@10: }else{ yading@10: s->time= (s->last_time_base + time_incr)*s->avctx->time_base.den + time_increment; yading@10: s->pb_time= s->pp_time - (s->last_non_b_time - s->time); yading@10: if(s->pp_time <=s->pb_time || s->pp_time <= s->pp_time - s->pb_time || s->pp_time<=0){ yading@10: /* messed up order, maybe after seeking? skipping current b-frame */ yading@10: return FRAME_SKIPPED; yading@10: } yading@10: ff_mpeg4_init_direct_mv(s); yading@10: yading@10: if(s->t_frame==0) s->t_frame= s->pb_time; yading@10: if(s->t_frame==0) s->t_frame=1; // 1/0 protection yading@10: s->pp_field_time= ( ROUNDED_DIV(s->last_non_b_time, s->t_frame) yading@10: - ROUNDED_DIV(s->last_non_b_time - s->pp_time, s->t_frame))*2; yading@10: s->pb_field_time= ( ROUNDED_DIV(s->time, s->t_frame) yading@10: - ROUNDED_DIV(s->last_non_b_time - s->pp_time, s->t_frame))*2; yading@10: if(!s->progressive_sequence){ yading@10: if(s->pp_field_time <= s->pb_field_time || s->pb_field_time <= 1) yading@10: return FRAME_SKIPPED; yading@10: } yading@10: } yading@10: yading@10: if(s->avctx->time_base.num) yading@10: s->current_picture_ptr->f.pts = ROUNDED_DIV(s->time, s->avctx->time_base.num); yading@10: else yading@10: s->current_picture_ptr->f.pts = AV_NOPTS_VALUE; yading@10: if(s->avctx->debug&FF_DEBUG_PTS) yading@10: av_log(s->avctx, AV_LOG_DEBUG, "MPEG4 PTS: %"PRId64"\n", yading@10: s->current_picture_ptr->f.pts); yading@10: yading@10: check_marker(gb, "before vop_coded"); yading@10: yading@10: /* vop coded */ yading@10: if (get_bits1(gb) != 1){ yading@10: if(s->avctx->debug&FF_DEBUG_PICT_INFO) yading@10: av_log(s->avctx, AV_LOG_ERROR, "vop not coded\n"); yading@10: return FRAME_SKIPPED; yading@10: } yading@10: if (s->shape != BIN_ONLY_SHAPE && ( s->pict_type == AV_PICTURE_TYPE_P yading@10: || (s->pict_type == AV_PICTURE_TYPE_S && s->vol_sprite_usage==GMC_SPRITE))) { yading@10: /* rounding type for motion estimation */ yading@10: s->no_rounding = get_bits1(gb); yading@10: } else { yading@10: s->no_rounding = 0; yading@10: } yading@10: //FIXME reduced res stuff yading@10: yading@10: if (s->shape != RECT_SHAPE) { yading@10: if (s->vol_sprite_usage != 1 || s->pict_type != AV_PICTURE_TYPE_I) { yading@10: skip_bits(gb, 13); /* width */ yading@10: skip_bits1(gb); /* marker */ yading@10: skip_bits(gb, 13); /* height */ yading@10: skip_bits1(gb); /* marker */ yading@10: skip_bits(gb, 13); /* hor_spat_ref */ yading@10: skip_bits1(gb); /* marker */ yading@10: skip_bits(gb, 13); /* ver_spat_ref */ yading@10: } yading@10: skip_bits1(gb); /* change_CR_disable */ yading@10: yading@10: if (get_bits1(gb) != 0) { yading@10: skip_bits(gb, 8); /* constant_alpha_value */ yading@10: } yading@10: } yading@10: //FIXME complexity estimation stuff yading@10: yading@10: if (s->shape != BIN_ONLY_SHAPE) { yading@10: skip_bits_long(gb, s->cplx_estimation_trash_i); yading@10: if(s->pict_type != AV_PICTURE_TYPE_I) yading@10: skip_bits_long(gb, s->cplx_estimation_trash_p); yading@10: if(s->pict_type == AV_PICTURE_TYPE_B) yading@10: skip_bits_long(gb, s->cplx_estimation_trash_b); yading@10: yading@10: if(get_bits_left(gb) < 3) { yading@10: av_log(s->avctx, AV_LOG_ERROR, "Header truncated\n"); yading@10: return -1; yading@10: } yading@10: s->intra_dc_threshold= ff_mpeg4_dc_threshold[ get_bits(gb, 3) ]; yading@10: if(!s->progressive_sequence){ yading@10: s->top_field_first= get_bits1(gb); yading@10: s->alternate_scan= get_bits1(gb); yading@10: }else yading@10: s->alternate_scan= 0; yading@10: } yading@10: yading@10: if(s->alternate_scan){ yading@10: ff_init_scantable(s->dsp.idct_permutation, &s->inter_scantable , ff_alternate_vertical_scan); yading@10: ff_init_scantable(s->dsp.idct_permutation, &s->intra_scantable , ff_alternate_vertical_scan); yading@10: ff_init_scantable(s->dsp.idct_permutation, &s->intra_h_scantable, ff_alternate_vertical_scan); yading@10: ff_init_scantable(s->dsp.idct_permutation, &s->intra_v_scantable, ff_alternate_vertical_scan); yading@10: } else{ yading@10: ff_init_scantable(s->dsp.idct_permutation, &s->inter_scantable , ff_zigzag_direct); yading@10: ff_init_scantable(s->dsp.idct_permutation, &s->intra_scantable , ff_zigzag_direct); yading@10: ff_init_scantable(s->dsp.idct_permutation, &s->intra_h_scantable, ff_alternate_horizontal_scan); yading@10: ff_init_scantable(s->dsp.idct_permutation, &s->intra_v_scantable, ff_alternate_vertical_scan); yading@10: } yading@10: yading@10: if(s->pict_type == AV_PICTURE_TYPE_S && (s->vol_sprite_usage==STATIC_SPRITE || s->vol_sprite_usage==GMC_SPRITE)){ yading@10: if(mpeg4_decode_sprite_trajectory(s, gb) < 0) yading@10: return -1; yading@10: if(s->sprite_brightness_change) av_log(s->avctx, AV_LOG_ERROR, "sprite_brightness_change not supported\n"); yading@10: if(s->vol_sprite_usage==STATIC_SPRITE) av_log(s->avctx, AV_LOG_ERROR, "static sprite not supported\n"); yading@10: } yading@10: yading@10: if (s->shape != BIN_ONLY_SHAPE) { yading@10: s->chroma_qscale= s->qscale = get_bits(gb, s->quant_precision); yading@10: if(s->qscale==0){ yading@10: av_log(s->avctx, AV_LOG_ERROR, "Error, header damaged or not MPEG4 header (qscale=0)\n"); yading@10: return -1; // makes no sense to continue, as there is nothing left from the image then yading@10: } yading@10: yading@10: if (s->pict_type != AV_PICTURE_TYPE_I) { yading@10: s->f_code = get_bits(gb, 3); /* fcode_for */ yading@10: if(s->f_code==0){ yading@10: av_log(s->avctx, AV_LOG_ERROR, "Error, header damaged or not MPEG4 header (f_code=0)\n"); yading@10: s->f_code=1; yading@10: return -1; // makes no sense to continue, as the MV decoding will break very quickly yading@10: } yading@10: }else yading@10: s->f_code=1; yading@10: yading@10: if (s->pict_type == AV_PICTURE_TYPE_B) { yading@10: s->b_code = get_bits(gb, 3); yading@10: if(s->b_code==0){ yading@10: av_log(s->avctx, AV_LOG_ERROR, "Error, header damaged or not MPEG4 header (b_code=0)\n"); yading@10: s->b_code=1; yading@10: return -1; // makes no sense to continue, as the MV decoding will break very quickly yading@10: } yading@10: }else yading@10: s->b_code=1; yading@10: yading@10: if(s->avctx->debug&FF_DEBUG_PICT_INFO){ yading@10: av_log(s->avctx, AV_LOG_DEBUG, "qp:%d fc:%d,%d %s size:%d pro:%d alt:%d top:%d %spel part:%d resync:%d w:%d a:%d rnd:%d vot:%d%s dc:%d ce:%d/%d/%d time:%"PRId64" tincr:%d\n", yading@10: s->qscale, s->f_code, s->b_code, yading@10: s->pict_type == AV_PICTURE_TYPE_I ? "I" : (s->pict_type == AV_PICTURE_TYPE_P ? "P" : (s->pict_type == AV_PICTURE_TYPE_B ? "B" : "S")), yading@10: gb->size_in_bits,s->progressive_sequence, s->alternate_scan, s->top_field_first, yading@10: s->quarter_sample ? "q" : "h", s->data_partitioning, s->resync_marker, s->num_sprite_warping_points, yading@10: s->sprite_warping_accuracy, 1-s->no_rounding, s->vo_type, s->vol_control_parameters ? " VOLC" : " ", s->intra_dc_threshold, yading@10: s->cplx_estimation_trash_i, s->cplx_estimation_trash_p, s->cplx_estimation_trash_b, yading@10: s->time, yading@10: time_increment yading@10: ); yading@10: } yading@10: yading@10: if(!s->scalability){ yading@10: if (s->shape!=RECT_SHAPE && s->pict_type!=AV_PICTURE_TYPE_I) { yading@10: skip_bits1(gb); // vop shape coding type yading@10: } yading@10: }else{ yading@10: if(s->enhancement_type){ yading@10: int load_backward_shape= get_bits1(gb); yading@10: if(load_backward_shape){ yading@10: av_log(s->avctx, AV_LOG_ERROR, "load backward shape isn't supported\n"); yading@10: } yading@10: } yading@10: skip_bits(gb, 2); //ref_select_code yading@10: } yading@10: } yading@10: /* detect buggy encoders which don't set the low_delay flag (divx4/xvid/opendivx)*/ yading@10: // note we cannot detect divx5 without b-frames easily (although it's buggy too) yading@10: if(s->vo_type==0 && s->vol_control_parameters==0 && s->divx_version==-1 && s->picture_number==0){ yading@10: av_log(s->avctx, AV_LOG_WARNING, "looks like this file was encoded with (divx4/(old)xvid/opendivx) -> forcing low_delay flag\n"); yading@10: s->low_delay=1; yading@10: } yading@10: yading@10: s->picture_number++; // better than pic number==0 always ;) yading@10: yading@10: s->y_dc_scale_table= ff_mpeg4_y_dc_scale_table; //FIXME add short header support yading@10: s->c_dc_scale_table= ff_mpeg4_c_dc_scale_table; yading@10: yading@10: if(s->workaround_bugs&FF_BUG_EDGE){ yading@10: s->h_edge_pos= s->width; yading@10: s->v_edge_pos= s->height; yading@10: } yading@10: return 0; yading@10: } yading@10: yading@10: /** yading@10: * Decode mpeg4 headers. yading@10: * @return <0 if no VOP found (or a damaged one) yading@10: * FRAME_SKIPPED if a not coded VOP is found yading@10: * 0 if a VOP is found yading@10: */ yading@10: int ff_mpeg4_decode_picture_header(MpegEncContext * s, GetBitContext *gb) yading@10: { yading@10: unsigned startcode, v; yading@10: yading@10: /* search next start code */ yading@10: align_get_bits(gb); yading@10: yading@10: if(s->codec_tag == AV_RL32("WV1F") && show_bits(gb, 24) == 0x575630){ yading@10: skip_bits(gb, 24); yading@10: if(get_bits(gb, 8) == 0xF0) yading@10: goto end; yading@10: } yading@10: yading@10: startcode = 0xff; yading@10: for(;;) { yading@10: if(get_bits_count(gb) >= gb->size_in_bits){ yading@10: if(gb->size_in_bits==8 && (s->divx_version>=0 || s->xvid_build>=0) || s->codec_tag == AV_RL32("QMP4")){ yading@10: av_log(s->avctx, AV_LOG_VERBOSE, "frame skip %d\n", gb->size_in_bits); yading@10: return FRAME_SKIPPED; //divx bug yading@10: }else yading@10: return -1; //end of stream yading@10: } yading@10: yading@10: /* use the bits after the test */ yading@10: v = get_bits(gb, 8); yading@10: startcode = ((startcode << 8) | v) & 0xffffffff; yading@10: yading@10: if((startcode&0xFFFFFF00) != 0x100) yading@10: continue; //no startcode yading@10: yading@10: if(s->avctx->debug&FF_DEBUG_STARTCODE){ yading@10: av_log(s->avctx, AV_LOG_DEBUG, "startcode: %3X ", startcode); yading@10: if (startcode<=0x11F) av_log(s->avctx, AV_LOG_DEBUG, "Video Object Start"); yading@10: else if(startcode<=0x12F) av_log(s->avctx, AV_LOG_DEBUG, "Video Object Layer Start"); yading@10: else if(startcode<=0x13F) av_log(s->avctx, AV_LOG_DEBUG, "Reserved"); yading@10: else if(startcode<=0x15F) av_log(s->avctx, AV_LOG_DEBUG, "FGS bp start"); yading@10: else if(startcode<=0x1AF) av_log(s->avctx, AV_LOG_DEBUG, "Reserved"); yading@10: else if(startcode==0x1B0) av_log(s->avctx, AV_LOG_DEBUG, "Visual Object Seq Start"); yading@10: else if(startcode==0x1B1) av_log(s->avctx, AV_LOG_DEBUG, "Visual Object Seq End"); yading@10: else if(startcode==0x1B2) av_log(s->avctx, AV_LOG_DEBUG, "User Data"); yading@10: else if(startcode==0x1B3) av_log(s->avctx, AV_LOG_DEBUG, "Group of VOP start"); yading@10: else if(startcode==0x1B4) av_log(s->avctx, AV_LOG_DEBUG, "Video Session Error"); yading@10: else if(startcode==0x1B5) av_log(s->avctx, AV_LOG_DEBUG, "Visual Object Start"); yading@10: else if(startcode==0x1B6) av_log(s->avctx, AV_LOG_DEBUG, "Video Object Plane start"); yading@10: else if(startcode==0x1B7) av_log(s->avctx, AV_LOG_DEBUG, "slice start"); yading@10: else if(startcode==0x1B8) av_log(s->avctx, AV_LOG_DEBUG, "extension start"); yading@10: else if(startcode==0x1B9) av_log(s->avctx, AV_LOG_DEBUG, "fgs start"); yading@10: else if(startcode==0x1BA) av_log(s->avctx, AV_LOG_DEBUG, "FBA Object start"); yading@10: else if(startcode==0x1BB) av_log(s->avctx, AV_LOG_DEBUG, "FBA Object Plane start"); yading@10: else if(startcode==0x1BC) av_log(s->avctx, AV_LOG_DEBUG, "Mesh Object start"); yading@10: else if(startcode==0x1BD) av_log(s->avctx, AV_LOG_DEBUG, "Mesh Object Plane start"); yading@10: else if(startcode==0x1BE) av_log(s->avctx, AV_LOG_DEBUG, "Still Texture Object start"); yading@10: else if(startcode==0x1BF) av_log(s->avctx, AV_LOG_DEBUG, "Texture Spatial Layer start"); yading@10: else if(startcode==0x1C0) av_log(s->avctx, AV_LOG_DEBUG, "Texture SNR Layer start"); yading@10: else if(startcode==0x1C1) av_log(s->avctx, AV_LOG_DEBUG, "Texture Tile start"); yading@10: else if(startcode==0x1C2) av_log(s->avctx, AV_LOG_DEBUG, "Texture Shape Layer start"); yading@10: else if(startcode==0x1C3) av_log(s->avctx, AV_LOG_DEBUG, "stuffing start"); yading@10: else if(startcode<=0x1C5) av_log(s->avctx, AV_LOG_DEBUG, "reserved"); yading@10: else if(startcode<=0x1FF) av_log(s->avctx, AV_LOG_DEBUG, "System start"); yading@10: av_log(s->avctx, AV_LOG_DEBUG, " at %d\n", get_bits_count(gb)); yading@10: } yading@10: yading@10: if(startcode >= 0x120 && startcode <= 0x12F){ yading@10: if(decode_vol_header(s, gb) < 0) yading@10: return -1; yading@10: } yading@10: else if(startcode == USER_DATA_STARTCODE){ yading@10: decode_user_data(s, gb); yading@10: } yading@10: else if(startcode == GOP_STARTCODE){ yading@10: mpeg4_decode_gop_header(s, gb); yading@10: } yading@10: else if(startcode == VOS_STARTCODE){ yading@10: mpeg4_decode_profile_level(s, gb); yading@10: } yading@10: else if(startcode == VOP_STARTCODE){ yading@10: break; yading@10: } yading@10: yading@10: align_get_bits(gb); yading@10: startcode = 0xff; yading@10: } yading@10: end: yading@10: if(s->flags& CODEC_FLAG_LOW_DELAY) yading@10: s->low_delay=1; yading@10: s->avctx->has_b_frames= !s->low_delay; yading@10: return decode_vop_header(s, gb); yading@10: } yading@10: yading@10: av_cold void ff_mpeg4videodec_static_init(void) { yading@10: static int done = 0; yading@10: yading@10: if (!done) { yading@10: ff_init_rl(&ff_mpeg4_rl_intra, ff_mpeg4_static_rl_table_store[0]); yading@10: ff_init_rl(&ff_rvlc_rl_inter, ff_mpeg4_static_rl_table_store[1]); yading@10: ff_init_rl(&ff_rvlc_rl_intra, ff_mpeg4_static_rl_table_store[2]); yading@10: INIT_VLC_RL(ff_mpeg4_rl_intra, 554); yading@10: INIT_VLC_RL(ff_rvlc_rl_inter, 1072); yading@10: INIT_VLC_RL(ff_rvlc_rl_intra, 1072); yading@10: INIT_VLC_STATIC(&dc_lum, DC_VLC_BITS, 10 /* 13 */, yading@10: &ff_mpeg4_DCtab_lum[0][1], 2, 1, yading@10: &ff_mpeg4_DCtab_lum[0][0], 2, 1, 512); yading@10: INIT_VLC_STATIC(&dc_chrom, DC_VLC_BITS, 10 /* 13 */, yading@10: &ff_mpeg4_DCtab_chrom[0][1], 2, 1, yading@10: &ff_mpeg4_DCtab_chrom[0][0], 2, 1, 512); yading@10: INIT_VLC_STATIC(&sprite_trajectory, SPRITE_TRAJ_VLC_BITS, 15, yading@10: &ff_sprite_trajectory_tab[0][1], 4, 2, yading@10: &ff_sprite_trajectory_tab[0][0], 4, 2, 128); yading@10: INIT_VLC_STATIC(&mb_type_b_vlc, MB_TYPE_B_VLC_BITS, 4, yading@10: &ff_mb_type_b_tab[0][1], 2, 1, yading@10: &ff_mb_type_b_tab[0][0], 2, 1, 16); yading@10: done = 1; yading@10: } yading@10: } yading@10: yading@10: static av_cold int decode_init(AVCodecContext *avctx) yading@10: { yading@10: MpegEncContext *s = avctx->priv_data; yading@10: int ret; yading@10: yading@10: s->divx_version= yading@10: s->divx_build= yading@10: s->xvid_build= yading@10: s->lavc_build= -1; yading@10: yading@10: if((ret=ff_h263_decode_init(avctx)) < 0) yading@10: return ret; yading@10: yading@10: ff_mpeg4videodec_static_init(); yading@10: yading@10: s->h263_pred = 1; yading@10: s->low_delay = 0; //default, might be overridden in the vol header during header parsing yading@10: s->decode_mb= mpeg4_decode_mb; yading@10: s->time_increment_bits = 4; /* default value for broken headers */ yading@10: avctx->chroma_sample_location = AVCHROMA_LOC_LEFT; yading@10: yading@10: avctx->internal->allocate_progress = 1; yading@10: yading@10: return 0; yading@10: } yading@10: yading@10: static const AVProfile mpeg4_video_profiles[] = { yading@10: { FF_PROFILE_MPEG4_SIMPLE, "Simple Profile" }, yading@10: { FF_PROFILE_MPEG4_SIMPLE_SCALABLE, "Simple Scalable Profile" }, yading@10: { FF_PROFILE_MPEG4_CORE, "Core Profile" }, yading@10: { FF_PROFILE_MPEG4_MAIN, "Main Profile" }, yading@10: { FF_PROFILE_MPEG4_N_BIT, "N-bit Profile" }, yading@10: { FF_PROFILE_MPEG4_SCALABLE_TEXTURE, "Scalable Texture Profile" }, yading@10: { FF_PROFILE_MPEG4_SIMPLE_FACE_ANIMATION, "Simple Face Animation Profile" }, yading@10: { FF_PROFILE_MPEG4_BASIC_ANIMATED_TEXTURE, "Basic Animated Texture Profile" }, yading@10: { FF_PROFILE_MPEG4_HYBRID, "Hybrid Profile" }, yading@10: { FF_PROFILE_MPEG4_ADVANCED_REAL_TIME, "Advanced Real Time Simple Profile" }, yading@10: { FF_PROFILE_MPEG4_CORE_SCALABLE, "Code Scalable Profile" }, yading@10: { FF_PROFILE_MPEG4_ADVANCED_CODING, "Advanced Coding Profile" }, yading@10: { FF_PROFILE_MPEG4_ADVANCED_CORE, "Advanced Core Profile" }, yading@10: { FF_PROFILE_MPEG4_ADVANCED_SCALABLE_TEXTURE, "Advanced Scalable Texture Profile" }, yading@10: { FF_PROFILE_MPEG4_SIMPLE_STUDIO, "Simple Studio Profile" }, yading@10: { FF_PROFILE_MPEG4_ADVANCED_SIMPLE, "Advanced Simple Profile" }, yading@10: { FF_PROFILE_UNKNOWN }, yading@10: }; yading@10: yading@10: static const AVOption mpeg4_options[] = { yading@10: {"quarter_sample", "1/4 subpel MC", offsetof(MpegEncContext, quarter_sample), FF_OPT_TYPE_INT, {.i64 = 0}, 0, 1, 0}, yading@10: {"divx_packed", "divx style packed b frames", offsetof(MpegEncContext, divx_packed), FF_OPT_TYPE_INT, {.i64 = 0}, 0, 1, 0}, yading@10: {NULL} yading@10: }; yading@10: yading@10: static const AVClass mpeg4_class = { yading@10: "MPEG4 Video Decoder", yading@10: av_default_item_name, yading@10: mpeg4_options, yading@10: LIBAVUTIL_VERSION_INT, yading@10: }; yading@10: yading@10: static const AVClass mpeg4_vdpau_class = { yading@10: "MPEG4 Video VDPAU Decoder", yading@10: av_default_item_name, yading@10: mpeg4_options, yading@10: LIBAVUTIL_VERSION_INT, yading@10: }; yading@10: yading@10: AVCodec ff_mpeg4_decoder = { yading@10: .name = "mpeg4", yading@10: .type = AVMEDIA_TYPE_VIDEO, yading@10: .id = AV_CODEC_ID_MPEG4, yading@10: .priv_data_size = sizeof(MpegEncContext), yading@10: .init = decode_init, yading@10: .close = ff_h263_decode_end, yading@10: .decode = ff_h263_decode_frame, yading@10: .capabilities = CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1 | yading@10: CODEC_CAP_TRUNCATED | CODEC_CAP_DELAY | yading@10: CODEC_CAP_FRAME_THREADS, yading@10: .flush = ff_mpeg_flush, yading@10: .max_lowres = 3, yading@10: .long_name = NULL_IF_CONFIG_SMALL("MPEG-4 part 2"), yading@10: .pix_fmts = ff_h263_hwaccel_pixfmt_list_420, yading@10: .profiles = NULL_IF_CONFIG_SMALL(mpeg4_video_profiles), yading@10: .update_thread_context = ONLY_IF_THREADS_ENABLED(ff_mpeg_update_thread_context), yading@10: .priv_class = &mpeg4_class, yading@10: }; yading@10: yading@10: yading@10: #if CONFIG_MPEG4_VDPAU_DECODER yading@10: AVCodec ff_mpeg4_vdpau_decoder = { yading@10: .name = "mpeg4_vdpau", yading@10: .type = AVMEDIA_TYPE_VIDEO, yading@10: .id = AV_CODEC_ID_MPEG4, yading@10: .priv_data_size = sizeof(MpegEncContext), yading@10: .init = decode_init, yading@10: .close = ff_h263_decode_end, yading@10: .decode = ff_h263_decode_frame, yading@10: .capabilities = CODEC_CAP_DR1 | CODEC_CAP_TRUNCATED | CODEC_CAP_DELAY | yading@10: CODEC_CAP_HWACCEL_VDPAU, yading@10: .long_name = NULL_IF_CONFIG_SMALL("MPEG-4 part 2 (VDPAU)"), yading@10: .pix_fmts = (const enum AVPixelFormat[]){ AV_PIX_FMT_VDPAU_MPEG4, yading@10: AV_PIX_FMT_NONE }, yading@10: .priv_class = &mpeg4_vdpau_class, yading@10: }; yading@10: #endif