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2341 lines
88 KiB
2341 lines
88 KiB
/* |
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* MPEG4 decoder. |
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* Copyright (c) 2000,2001 Fabrice Bellard |
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* Copyright (c) 2002-2010 Michael Niedermayer <michaelni@gmx.at> |
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* |
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* This file is part of FFmpeg. |
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* |
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* FFmpeg is free software; you can redistribute it and/or |
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* modify it under the terms of the GNU Lesser General Public |
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* License as published by the Free Software Foundation; either |
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* version 2.1 of the License, or (at your option) any later version. |
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* |
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* FFmpeg is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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* Lesser General Public License for more details. |
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* |
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* You should have received a copy of the GNU Lesser General Public |
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* License along with FFmpeg; if not, write to the Free Software |
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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*/ |
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|
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#define UNCHECKED_BITSTREAM_READER 1 |
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|
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#include "libavutil/opt.h" |
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#include "mpegvideo.h" |
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#include "mpeg4video.h" |
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#include "h263.h" |
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#include "thread.h" |
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|
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// The defines below define the number of bits that are read at once for |
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// reading vlc values. Changing these may improve speed and data cache needs |
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// be aware though that decreasing them may need the number of stages that is |
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// passed to get_vlc* to be increased. |
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#define SPRITE_TRAJ_VLC_BITS 6 |
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#define DC_VLC_BITS 9 |
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#define MB_TYPE_B_VLC_BITS 4 |
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static VLC dc_lum, dc_chrom; |
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static VLC sprite_trajectory; |
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static VLC mb_type_b_vlc; |
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static const int mb_type_b_map[4]= { |
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MB_TYPE_DIRECT2 | MB_TYPE_L0L1, |
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MB_TYPE_L0L1 | MB_TYPE_16x16, |
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MB_TYPE_L1 | MB_TYPE_16x16, |
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MB_TYPE_L0 | MB_TYPE_16x16, |
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}; |
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/** |
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* Predict the ac. |
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* @param n block index (0-3 are luma, 4-5 are chroma) |
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* @param dir the ac prediction direction |
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*/ |
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void mpeg4_pred_ac(MpegEncContext * s, DCTELEM *block, int n, |
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int dir) |
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{ |
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int i; |
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int16_t *ac_val, *ac_val1; |
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int8_t * const qscale_table = s->current_picture.f.qscale_table; |
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|
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/* find prediction */ |
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ac_val = s->ac_val[0][0] + s->block_index[n] * 16; |
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ac_val1 = ac_val; |
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if (s->ac_pred) { |
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if (dir == 0) { |
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const int xy= s->mb_x-1 + s->mb_y*s->mb_stride; |
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/* left prediction */ |
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ac_val -= 16; |
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if(s->mb_x==0 || s->qscale == qscale_table[xy] || n==1 || n==3){ |
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/* same qscale */ |
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for(i=1;i<8;i++) { |
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block[s->dsp.idct_permutation[i<<3]] += ac_val[i]; |
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} |
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}else{ |
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/* different qscale, we must rescale */ |
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for(i=1;i<8;i++) { |
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block[s->dsp.idct_permutation[i<<3]] += ROUNDED_DIV(ac_val[i]*qscale_table[xy], s->qscale); |
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} |
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} |
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} else { |
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const int xy= s->mb_x + s->mb_y*s->mb_stride - s->mb_stride; |
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/* top prediction */ |
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ac_val -= 16 * s->block_wrap[n]; |
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if(s->mb_y==0 || s->qscale == qscale_table[xy] || n==2 || n==3){ |
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/* same qscale */ |
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for(i=1;i<8;i++) { |
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block[s->dsp.idct_permutation[i]] += ac_val[i + 8]; |
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} |
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}else{ |
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/* different qscale, we must rescale */ |
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for(i=1;i<8;i++) { |
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block[s->dsp.idct_permutation[i]] += ROUNDED_DIV(ac_val[i + 8]*qscale_table[xy], s->qscale); |
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} |
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} |
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} |
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} |
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/* left copy */ |
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for(i=1;i<8;i++) |
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ac_val1[i ] = block[s->dsp.idct_permutation[i<<3]]; |
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/* top copy */ |
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for(i=1;i<8;i++) |
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ac_val1[8 + i] = block[s->dsp.idct_permutation[i ]]; |
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} |
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/** |
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* check if the next stuff is a resync marker or the end. |
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* @return 0 if not |
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*/ |
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static inline int mpeg4_is_resync(MpegEncContext *s){ |
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int bits_count= get_bits_count(&s->gb); |
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int v= show_bits(&s->gb, 16); |
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if(s->workaround_bugs&FF_BUG_NO_PADDING && !s->resync_marker){ |
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return 0; |
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} |
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while(v<=0xFF){ |
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if(s->pict_type==AV_PICTURE_TYPE_B || (v>>(8-s->pict_type)!=1) || s->partitioned_frame) |
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break; |
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skip_bits(&s->gb, 8+s->pict_type); |
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bits_count+= 8+s->pict_type; |
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v= show_bits(&s->gb, 16); |
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} |
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if(bits_count + 8 >= s->gb.size_in_bits){ |
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v>>=8; |
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v|= 0x7F >> (7-(bits_count&7)); |
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if(v==0x7F) |
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return s->mb_num; |
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}else{ |
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if(v == ff_mpeg4_resync_prefix[bits_count&7]){ |
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int len, mb_num; |
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int mb_num_bits= av_log2(s->mb_num - 1) + 1; |
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GetBitContext gb= s->gb; |
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skip_bits(&s->gb, 1); |
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align_get_bits(&s->gb); |
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for(len=0; len<32; len++){ |
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if(get_bits1(&s->gb)) break; |
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} |
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mb_num= get_bits(&s->gb, mb_num_bits); |
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if(!mb_num || mb_num > s->mb_num || get_bits_count(&s->gb)+6 > s->gb.size_in_bits) |
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mb_num= -1; |
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s->gb= gb; |
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if(len>=ff_mpeg4_get_video_packet_prefix_length(s)) |
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return mb_num; |
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} |
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} |
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return 0; |
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} |
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static int mpeg4_decode_sprite_trajectory(MpegEncContext * s, GetBitContext *gb) |
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{ |
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int i; |
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int a= 2<<s->sprite_warping_accuracy; |
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int rho= 3-s->sprite_warping_accuracy; |
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int r=16/a; |
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const int vop_ref[4][2]= {{0,0}, {s->width,0}, {0, s->height}, {s->width, s->height}}; // only true for rectangle shapes |
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int d[4][2]={{0,0}, {0,0}, {0,0}, {0,0}}; |
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int sprite_ref[4][2]; |
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int virtual_ref[2][2]; |
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int w2, h2, w3, h3; |
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int alpha=0, beta=0; |
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int w= s->width; |
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int h= s->height; |
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int min_ab; |
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if(w<=0 || h<=0) |
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return -1; |
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for(i=0; i<s->num_sprite_warping_points; i++){ |
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int length; |
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int x=0, y=0; |
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length= get_vlc2(gb, sprite_trajectory.table, SPRITE_TRAJ_VLC_BITS, 3); |
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if(length){ |
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x= get_xbits(gb, length); |
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} |
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if(!(s->divx_version==500 && s->divx_build==413)) skip_bits1(gb); /* marker bit */ |
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length= get_vlc2(gb, sprite_trajectory.table, SPRITE_TRAJ_VLC_BITS, 3); |
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if(length){ |
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y=get_xbits(gb, length); |
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} |
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skip_bits1(gb); /* marker bit */ |
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s->sprite_traj[i][0]= d[i][0]= x; |
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s->sprite_traj[i][1]= d[i][1]= y; |
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} |
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for(; i<4; i++) |
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s->sprite_traj[i][0]= s->sprite_traj[i][1]= 0; |
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while((1<<alpha)<w) alpha++; |
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while((1<<beta )<h) beta++; // there seems to be a typo in the mpeg4 std for the definition of w' and h' |
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w2= 1<<alpha; |
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h2= 1<<beta; |
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// Note, the 4th point isn't used for GMC |
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if(s->divx_version==500 && s->divx_build==413){ |
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sprite_ref[0][0]= a*vop_ref[0][0] + d[0][0]; |
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sprite_ref[0][1]= a*vop_ref[0][1] + d[0][1]; |
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sprite_ref[1][0]= a*vop_ref[1][0] + d[0][0] + d[1][0]; |
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sprite_ref[1][1]= a*vop_ref[1][1] + d[0][1] + d[1][1]; |
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sprite_ref[2][0]= a*vop_ref[2][0] + d[0][0] + d[2][0]; |
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sprite_ref[2][1]= a*vop_ref[2][1] + d[0][1] + d[2][1]; |
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} else { |
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sprite_ref[0][0]= (a>>1)*(2*vop_ref[0][0] + d[0][0]); |
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sprite_ref[0][1]= (a>>1)*(2*vop_ref[0][1] + d[0][1]); |
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sprite_ref[1][0]= (a>>1)*(2*vop_ref[1][0] + d[0][0] + d[1][0]); |
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sprite_ref[1][1]= (a>>1)*(2*vop_ref[1][1] + d[0][1] + d[1][1]); |
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sprite_ref[2][0]= (a>>1)*(2*vop_ref[2][0] + d[0][0] + d[2][0]); |
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sprite_ref[2][1]= (a>>1)*(2*vop_ref[2][1] + d[0][1] + d[2][1]); |
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} |
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/* sprite_ref[3][0]= (a>>1)*(2*vop_ref[3][0] + d[0][0] + d[1][0] + d[2][0] + d[3][0]); |
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sprite_ref[3][1]= (a>>1)*(2*vop_ref[3][1] + d[0][1] + d[1][1] + d[2][1] + d[3][1]); */ |
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|
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// this is mostly identical to the mpeg4 std (and is totally unreadable because of that ...) |
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// perhaps it should be reordered to be more readable ... |
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// the idea behind this virtual_ref mess is to be able to use shifts later per pixel instead of divides |
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// so the distance between points is converted from w&h based to w2&h2 based which are of the 2^x form |
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virtual_ref[0][0]= 16*(vop_ref[0][0] + w2) |
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+ 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); |
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virtual_ref[0][1]= 16*vop_ref[0][1] |
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+ 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); |
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virtual_ref[1][0]= 16*vop_ref[0][0] |
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+ 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); |
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virtual_ref[1][1]= 16*(vop_ref[0][1] + h2) |
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+ 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); |
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switch(s->num_sprite_warping_points) |
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{ |
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case 0: |
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s->sprite_offset[0][0]= 0; |
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s->sprite_offset[0][1]= 0; |
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s->sprite_offset[1][0]= 0; |
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s->sprite_offset[1][1]= 0; |
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s->sprite_delta[0][0]= a; |
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s->sprite_delta[0][1]= 0; |
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s->sprite_delta[1][0]= 0; |
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s->sprite_delta[1][1]= a; |
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s->sprite_shift[0]= 0; |
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s->sprite_shift[1]= 0; |
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break; |
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case 1: //GMC only |
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s->sprite_offset[0][0]= sprite_ref[0][0] - a*vop_ref[0][0]; |
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s->sprite_offset[0][1]= sprite_ref[0][1] - a*vop_ref[0][1]; |
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s->sprite_offset[1][0]= ((sprite_ref[0][0]>>1)|(sprite_ref[0][0]&1)) - a*(vop_ref[0][0]/2); |
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s->sprite_offset[1][1]= ((sprite_ref[0][1]>>1)|(sprite_ref[0][1]&1)) - a*(vop_ref[0][1]/2); |
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s->sprite_delta[0][0]= a; |
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s->sprite_delta[0][1]= 0; |
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s->sprite_delta[1][0]= 0; |
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s->sprite_delta[1][1]= a; |
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s->sprite_shift[0]= 0; |
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s->sprite_shift[1]= 0; |
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break; |
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case 2: |
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s->sprite_offset[0][0]= (sprite_ref[0][0]<<(alpha+rho)) |
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+ (-r*sprite_ref[0][0] + virtual_ref[0][0])*(-vop_ref[0][0]) |
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+ ( r*sprite_ref[0][1] - virtual_ref[0][1])*(-vop_ref[0][1]) |
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+ (1<<(alpha+rho-1)); |
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s->sprite_offset[0][1]= (sprite_ref[0][1]<<(alpha+rho)) |
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+ (-r*sprite_ref[0][1] + virtual_ref[0][1])*(-vop_ref[0][0]) |
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+ (-r*sprite_ref[0][0] + virtual_ref[0][0])*(-vop_ref[0][1]) |
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+ (1<<(alpha+rho-1)); |
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s->sprite_offset[1][0]= ( (-r*sprite_ref[0][0] + virtual_ref[0][0])*(-2*vop_ref[0][0] + 1) |
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+( r*sprite_ref[0][1] - virtual_ref[0][1])*(-2*vop_ref[0][1] + 1) |
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+2*w2*r*sprite_ref[0][0] |
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- 16*w2 |
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+ (1<<(alpha+rho+1))); |
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s->sprite_offset[1][1]= ( (-r*sprite_ref[0][1] + virtual_ref[0][1])*(-2*vop_ref[0][0] + 1) |
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+(-r*sprite_ref[0][0] + virtual_ref[0][0])*(-2*vop_ref[0][1] + 1) |
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+2*w2*r*sprite_ref[0][1] |
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- 16*w2 |
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+ (1<<(alpha+rho+1))); |
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s->sprite_delta[0][0]= (-r*sprite_ref[0][0] + virtual_ref[0][0]); |
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s->sprite_delta[0][1]= (+r*sprite_ref[0][1] - virtual_ref[0][1]); |
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s->sprite_delta[1][0]= (-r*sprite_ref[0][1] + virtual_ref[0][1]); |
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s->sprite_delta[1][1]= (-r*sprite_ref[0][0] + virtual_ref[0][0]); |
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|
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s->sprite_shift[0]= alpha+rho; |
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s->sprite_shift[1]= alpha+rho+2; |
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break; |
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case 3: |
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min_ab= FFMIN(alpha, beta); |
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w3= w2>>min_ab; |
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h3= h2>>min_ab; |
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s->sprite_offset[0][0]= (sprite_ref[0][0]<<(alpha+beta+rho-min_ab)) |
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+ (-r*sprite_ref[0][0] + virtual_ref[0][0])*h3*(-vop_ref[0][0]) |
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+ (-r*sprite_ref[0][0] + virtual_ref[1][0])*w3*(-vop_ref[0][1]) |
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+ (1<<(alpha+beta+rho-min_ab-1)); |
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s->sprite_offset[0][1]= (sprite_ref[0][1]<<(alpha+beta+rho-min_ab)) |
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+ (-r*sprite_ref[0][1] + virtual_ref[0][1])*h3*(-vop_ref[0][0]) |
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+ (-r*sprite_ref[0][1] + virtual_ref[1][1])*w3*(-vop_ref[0][1]) |
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+ (1<<(alpha+beta+rho-min_ab-1)); |
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s->sprite_offset[1][0]= (-r*sprite_ref[0][0] + virtual_ref[0][0])*h3*(-2*vop_ref[0][0] + 1) |
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+ (-r*sprite_ref[0][0] + virtual_ref[1][0])*w3*(-2*vop_ref[0][1] + 1) |
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+ 2*w2*h3*r*sprite_ref[0][0] |
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- 16*w2*h3 |
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+ (1<<(alpha+beta+rho-min_ab+1)); |
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s->sprite_offset[1][1]= (-r*sprite_ref[0][1] + virtual_ref[0][1])*h3*(-2*vop_ref[0][0] + 1) |
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+ (-r*sprite_ref[0][1] + virtual_ref[1][1])*w3*(-2*vop_ref[0][1] + 1) |
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+ 2*w2*h3*r*sprite_ref[0][1] |
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- 16*w2*h3 |
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+ (1<<(alpha+beta+rho-min_ab+1)); |
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s->sprite_delta[0][0]= (-r*sprite_ref[0][0] + virtual_ref[0][0])*h3; |
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s->sprite_delta[0][1]= (-r*sprite_ref[0][0] + virtual_ref[1][0])*w3; |
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s->sprite_delta[1][0]= (-r*sprite_ref[0][1] + virtual_ref[0][1])*h3; |
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s->sprite_delta[1][1]= (-r*sprite_ref[0][1] + virtual_ref[1][1])*w3; |
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|
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s->sprite_shift[0]= alpha + beta + rho - min_ab; |
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s->sprite_shift[1]= alpha + beta + rho - min_ab + 2; |
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break; |
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} |
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/* try to simplify the situation */ |
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if( s->sprite_delta[0][0] == a<<s->sprite_shift[0] |
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&& s->sprite_delta[0][1] == 0 |
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&& s->sprite_delta[1][0] == 0 |
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&& s->sprite_delta[1][1] == a<<s->sprite_shift[0]) |
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{ |
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s->sprite_offset[0][0]>>=s->sprite_shift[0]; |
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s->sprite_offset[0][1]>>=s->sprite_shift[0]; |
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s->sprite_offset[1][0]>>=s->sprite_shift[1]; |
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s->sprite_offset[1][1]>>=s->sprite_shift[1]; |
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s->sprite_delta[0][0]= a; |
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s->sprite_delta[0][1]= 0; |
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s->sprite_delta[1][0]= 0; |
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s->sprite_delta[1][1]= a; |
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s->sprite_shift[0]= 0; |
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s->sprite_shift[1]= 0; |
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s->real_sprite_warping_points=1; |
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} |
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else{ |
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int shift_y= 16 - s->sprite_shift[0]; |
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int shift_c= 16 - s->sprite_shift[1]; |
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for(i=0; i<2; i++){ |
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s->sprite_offset[0][i]<<= shift_y; |
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s->sprite_offset[1][i]<<= shift_c; |
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s->sprite_delta[0][i]<<= shift_y; |
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s->sprite_delta[1][i]<<= shift_y; |
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s->sprite_shift[i]= 16; |
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} |
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s->real_sprite_warping_points= s->num_sprite_warping_points; |
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} |
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return 0; |
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} |
|
|
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/** |
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* Decode the next video packet. |
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* @return <0 if something went wrong |
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*/ |
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int mpeg4_decode_video_packet_header(MpegEncContext *s) |
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{ |
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int mb_num_bits= av_log2(s->mb_num - 1) + 1; |
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int header_extension=0, mb_num, len; |
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|
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/* is there enough space left for a video packet + header */ |
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if( get_bits_count(&s->gb) > s->gb.size_in_bits-20) return -1; |
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|
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for(len=0; len<32; len++){ |
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if(get_bits1(&s->gb)) break; |
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} |
|
|
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if(len!=ff_mpeg4_get_video_packet_prefix_length(s)){ |
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av_log(s->avctx, AV_LOG_ERROR, "marker does not match f_code\n"); |
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return -1; |
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} |
|
|
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if(s->shape != RECT_SHAPE){ |
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header_extension= get_bits1(&s->gb); |
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//FIXME more stuff here |
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} |
|
|
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mb_num= get_bits(&s->gb, mb_num_bits); |
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if(mb_num>=s->mb_num){ |
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av_log(s->avctx, AV_LOG_ERROR, "illegal mb_num in video packet (%d %d) \n", mb_num, s->mb_num); |
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return -1; |
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} |
|
|
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s->mb_x= mb_num % s->mb_width; |
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s->mb_y= mb_num / s->mb_width; |
|
|
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if(s->shape != BIN_ONLY_SHAPE){ |
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int qscale= get_bits(&s->gb, s->quant_precision); |
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if(qscale) |
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s->chroma_qscale=s->qscale= qscale; |
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} |
|
|
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if(s->shape == RECT_SHAPE){ |
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header_extension= get_bits1(&s->gb); |
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} |
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if(header_extension){ |
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int time_incr=0; |
|
|
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while (get_bits1(&s->gb) != 0) |
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time_incr++; |
|
|
|
check_marker(&s->gb, "before time_increment in video packed header"); |
|
skip_bits(&s->gb, s->time_increment_bits); /* time_increment */ |
|
check_marker(&s->gb, "before vop_coding_type in video packed header"); |
|
|
|
skip_bits(&s->gb, 2); /* vop coding type */ |
|
//FIXME not rect stuff here |
|
|
|
if(s->shape != BIN_ONLY_SHAPE){ |
|
skip_bits(&s->gb, 3); /* intra dc vlc threshold */ |
|
//FIXME don't just ignore everything |
|
if(s->pict_type == AV_PICTURE_TYPE_S && s->vol_sprite_usage==GMC_SPRITE){ |
|
if(mpeg4_decode_sprite_trajectory(s, &s->gb) < 0) |
|
return -1; |
|
av_log(s->avctx, AV_LOG_ERROR, "untested\n"); |
|
} |
|
|
|
//FIXME reduced res stuff here |
|
|
|
if (s->pict_type != AV_PICTURE_TYPE_I) { |
|
int f_code = get_bits(&s->gb, 3); /* fcode_for */ |
|
if(f_code==0){ |
|
av_log(s->avctx, AV_LOG_ERROR, "Error, video packet header damaged (f_code=0)\n"); |
|
} |
|
} |
|
if (s->pict_type == AV_PICTURE_TYPE_B) { |
|
int b_code = get_bits(&s->gb, 3); |
|
if(b_code==0){ |
|
av_log(s->avctx, AV_LOG_ERROR, "Error, video packet header damaged (b_code=0)\n"); |
|
} |
|
} |
|
} |
|
} |
|
//FIXME new-pred stuff |
|
|
|
return 0; |
|
} |
|
|
|
/** |
|
* Get the average motion vector for a GMC MB. |
|
* @param n either 0 for the x component or 1 for y |
|
* @return the average MV for a GMC MB |
|
*/ |
|
static inline int get_amv(MpegEncContext *s, int n){ |
|
int x, y, mb_v, sum, dx, dy, shift; |
|
int len = 1 << (s->f_code + 4); |
|
const int a= s->sprite_warping_accuracy; |
|
|
|
if(s->workaround_bugs & FF_BUG_AMV) |
|
len >>= s->quarter_sample; |
|
|
|
if(s->real_sprite_warping_points==1){ |
|
if(s->divx_version==500 && s->divx_build==413) |
|
sum= s->sprite_offset[0][n] / (1<<(a - s->quarter_sample)); |
|
else |
|
sum= RSHIFT(s->sprite_offset[0][n]<<s->quarter_sample, a); |
|
}else{ |
|
dx= s->sprite_delta[n][0]; |
|
dy= s->sprite_delta[n][1]; |
|
shift= s->sprite_shift[0]; |
|
if(n) dy -= 1<<(shift + a + 1); |
|
else dx -= 1<<(shift + a + 1); |
|
mb_v= s->sprite_offset[0][n] + dx*s->mb_x*16 + dy*s->mb_y*16; |
|
|
|
sum=0; |
|
for(y=0; y<16; y++){ |
|
int v; |
|
|
|
v= mb_v + dy*y; |
|
//XXX FIXME optimize |
|
for(x=0; x<16; x++){ |
|
sum+= v>>shift; |
|
v+= dx; |
|
} |
|
} |
|
sum= RSHIFT(sum, a+8-s->quarter_sample); |
|
} |
|
|
|
if (sum < -len) sum= -len; |
|
else if (sum >= len) sum= len-1; |
|
|
|
return sum; |
|
} |
|
|
|
/** |
|
* Decode the dc value. |
|
* @param n block index (0-3 are luma, 4-5 are chroma) |
|
* @param dir_ptr the prediction direction will be stored here |
|
* @return the quantized dc |
|
*/ |
|
static inline int mpeg4_decode_dc(MpegEncContext * s, int n, int *dir_ptr) |
|
{ |
|
int level, code; |
|
|
|
if (n < 4) |
|
code = get_vlc2(&s->gb, dc_lum.table, DC_VLC_BITS, 1); |
|
else |
|
code = get_vlc2(&s->gb, dc_chrom.table, DC_VLC_BITS, 1); |
|
if (code < 0 || code > 9 /* && s->nbit<9 */){ |
|
av_log(s->avctx, AV_LOG_ERROR, "illegal dc vlc\n"); |
|
return -1; |
|
} |
|
if (code == 0) { |
|
level = 0; |
|
} else { |
|
if(IS_3IV1){ |
|
if(code==1) |
|
level= 2*get_bits1(&s->gb)-1; |
|
else{ |
|
if(get_bits1(&s->gb)) |
|
level = get_bits(&s->gb, code-1) + (1<<(code-1)); |
|
else |
|
level = -get_bits(&s->gb, code-1) - (1<<(code-1)); |
|
} |
|
}else{ |
|
level = get_xbits(&s->gb, code); |
|
} |
|
|
|
if (code > 8){ |
|
if(get_bits1(&s->gb)==0){ /* marker */ |
|
if(s->err_recognition&(AV_EF_BITSTREAM|AV_EF_COMPLIANT)){ |
|
av_log(s->avctx, AV_LOG_ERROR, "dc marker bit missing\n"); |
|
return -1; |
|
} |
|
} |
|
} |
|
} |
|
|
|
return ff_mpeg4_pred_dc(s, n, level, dir_ptr, 0); |
|
} |
|
|
|
/** |
|
* Decode first partition. |
|
* @return number of MBs decoded or <0 if an error occurred |
|
*/ |
|
static int mpeg4_decode_partition_a(MpegEncContext *s){ |
|
int mb_num; |
|
static const int8_t quant_tab[4] = { -1, -2, 1, 2 }; |
|
|
|
/* decode first partition */ |
|
mb_num=0; |
|
s->first_slice_line=1; |
|
for(; s->mb_y<s->mb_height; s->mb_y++){ |
|
ff_init_block_index(s); |
|
for(; s->mb_x<s->mb_width; s->mb_x++){ |
|
const int xy= s->mb_x + s->mb_y*s->mb_stride; |
|
int cbpc; |
|
int dir=0; |
|
|
|
mb_num++; |
|
ff_update_block_index(s); |
|
if(s->mb_x == s->resync_mb_x && s->mb_y == s->resync_mb_y+1) |
|
s->first_slice_line=0; |
|
|
|
if(s->pict_type==AV_PICTURE_TYPE_I){ |
|
int i; |
|
|
|
do{ |
|
if(show_bits_long(&s->gb, 19)==DC_MARKER){ |
|
return mb_num-1; |
|
} |
|
|
|
cbpc = get_vlc2(&s->gb, ff_h263_intra_MCBPC_vlc.table, INTRA_MCBPC_VLC_BITS, 2); |
|
if (cbpc < 0){ |
|
av_log(s->avctx, AV_LOG_ERROR, "cbpc corrupted at %d %d\n", s->mb_x, s->mb_y); |
|
return -1; |
|
} |
|
}while(cbpc == 8); |
|
|
|
s->cbp_table[xy]= cbpc & 3; |
|
s->current_picture.f.mb_type[xy] = MB_TYPE_INTRA; |
|
s->mb_intra = 1; |
|
|
|
if(cbpc & 4) { |
|
ff_set_qscale(s, s->qscale + quant_tab[get_bits(&s->gb, 2)]); |
|
} |
|
s->current_picture.f.qscale_table[xy]= s->qscale; |
|
|
|
s->mbintra_table[xy]= 1; |
|
for(i=0; i<6; i++){ |
|
int dc_pred_dir; |
|
int dc= mpeg4_decode_dc(s, i, &dc_pred_dir); |
|
if(dc < 0){ |
|
av_log(s->avctx, AV_LOG_ERROR, "DC corrupted at %d %d\n", s->mb_x, s->mb_y); |
|
return -1; |
|
} |
|
dir<<=1; |
|
if(dc_pred_dir) dir|=1; |
|
} |
|
s->pred_dir_table[xy]= dir; |
|
}else{ /* P/S_TYPE */ |
|
int mx, my, pred_x, pred_y, bits; |
|
int16_t * const mot_val = s->current_picture.f.motion_val[0][s->block_index[0]]; |
|
const int stride= s->b8_stride*2; |
|
|
|
try_again: |
|
bits= show_bits(&s->gb, 17); |
|
if(bits==MOTION_MARKER){ |
|
return mb_num-1; |
|
} |
|
skip_bits1(&s->gb); |
|
if(bits&0x10000){ |
|
/* skip mb */ |
|
if(s->pict_type==AV_PICTURE_TYPE_S && s->vol_sprite_usage==GMC_SPRITE){ |
|
s->current_picture.f.mb_type[xy] = MB_TYPE_SKIP | MB_TYPE_16x16 | MB_TYPE_GMC | MB_TYPE_L0; |
|
mx= get_amv(s, 0); |
|
my= get_amv(s, 1); |
|
}else{ |
|
s->current_picture.f.mb_type[xy] = MB_TYPE_SKIP | MB_TYPE_16x16 | MB_TYPE_L0; |
|
mx=my=0; |
|
} |
|
mot_val[0 ]= mot_val[2 ]= |
|
mot_val[0+stride]= mot_val[2+stride]= mx; |
|
mot_val[1 ]= mot_val[3 ]= |
|
mot_val[1+stride]= mot_val[3+stride]= my; |
|
|
|
if(s->mbintra_table[xy]) |
|
ff_clean_intra_table_entries(s); |
|
continue; |
|
} |
|
|
|
cbpc = get_vlc2(&s->gb, ff_h263_inter_MCBPC_vlc.table, INTER_MCBPC_VLC_BITS, 2); |
|
if (cbpc < 0){ |
|
av_log(s->avctx, AV_LOG_ERROR, "cbpc corrupted at %d %d\n", s->mb_x, s->mb_y); |
|
return -1; |
|
} |
|
if(cbpc == 20) |
|
goto try_again; |
|
|
|
s->cbp_table[xy]= cbpc&(8+3); //8 is dquant |
|
|
|
s->mb_intra = ((cbpc & 4) != 0); |
|
|
|
if(s->mb_intra){ |
|
s->current_picture.f.mb_type[xy] = MB_TYPE_INTRA; |
|
s->mbintra_table[xy]= 1; |
|
mot_val[0 ]= mot_val[2 ]= |
|
mot_val[0+stride]= mot_val[2+stride]= 0; |
|
mot_val[1 ]= mot_val[3 ]= |
|
mot_val[1+stride]= mot_val[3+stride]= 0; |
|
}else{ |
|
if(s->mbintra_table[xy]) |
|
ff_clean_intra_table_entries(s); |
|
|
|
if(s->pict_type==AV_PICTURE_TYPE_S && s->vol_sprite_usage==GMC_SPRITE && (cbpc & 16) == 0) |
|
s->mcsel= get_bits1(&s->gb); |
|
else s->mcsel= 0; |
|
|
|
if ((cbpc & 16) == 0) { |
|
/* 16x16 motion prediction */ |
|
|
|
h263_pred_motion(s, 0, 0, &pred_x, &pred_y); |
|
if(!s->mcsel){ |
|
mx = h263_decode_motion(s, pred_x, s->f_code); |
|
if (mx >= 0xffff) |
|
return -1; |
|
|
|
my = h263_decode_motion(s, pred_y, s->f_code); |
|
if (my >= 0xffff) |
|
return -1; |
|
s->current_picture.f.mb_type[xy] = MB_TYPE_16x16 | MB_TYPE_L0; |
|
} else { |
|
mx = get_amv(s, 0); |
|
my = get_amv(s, 1); |
|
s->current_picture.f.mb_type[xy] = MB_TYPE_16x16 | MB_TYPE_GMC | MB_TYPE_L0; |
|
} |
|
|
|
mot_val[0 ]= mot_val[2 ] = |
|
mot_val[0+stride]= mot_val[2+stride]= mx; |
|
mot_val[1 ]= mot_val[3 ]= |
|
mot_val[1+stride]= mot_val[3+stride]= my; |
|
} else { |
|
int i; |
|
s->current_picture.f.mb_type[xy] = MB_TYPE_8x8 | MB_TYPE_L0; |
|
for(i=0;i<4;i++) { |
|
int16_t *mot_val= h263_pred_motion(s, i, 0, &pred_x, &pred_y); |
|
mx = h263_decode_motion(s, pred_x, s->f_code); |
|
if (mx >= 0xffff) |
|
return -1; |
|
|
|
my = h263_decode_motion(s, pred_y, s->f_code); |
|
if (my >= 0xffff) |
|
return -1; |
|
mot_val[0] = mx; |
|
mot_val[1] = my; |
|
} |
|
} |
|
} |
|
} |
|
} |
|
s->mb_x= 0; |
|
} |
|
|
|
return mb_num; |
|
} |
|
|
|
/** |
|
* decode second partition. |
|
* @return <0 if an error occurred |
|
*/ |
|
static int mpeg4_decode_partition_b(MpegEncContext *s, int mb_count){ |
|
int mb_num=0; |
|
static const int8_t quant_tab[4] = { -1, -2, 1, 2 }; |
|
|
|
s->mb_x= s->resync_mb_x; |
|
s->first_slice_line=1; |
|
for(s->mb_y= s->resync_mb_y; mb_num < mb_count; s->mb_y++){ |
|
ff_init_block_index(s); |
|
for(; mb_num < mb_count && s->mb_x<s->mb_width; s->mb_x++){ |
|
const int xy= s->mb_x + s->mb_y*s->mb_stride; |
|
|
|
mb_num++; |
|
ff_update_block_index(s); |
|
if(s->mb_x == s->resync_mb_x && s->mb_y == s->resync_mb_y+1) |
|
s->first_slice_line=0; |
|
|
|
if(s->pict_type==AV_PICTURE_TYPE_I){ |
|
int ac_pred= get_bits1(&s->gb); |
|
int cbpy = get_vlc2(&s->gb, ff_h263_cbpy_vlc.table, CBPY_VLC_BITS, 1); |
|
if(cbpy<0){ |
|
av_log(s->avctx, AV_LOG_ERROR, "cbpy corrupted at %d %d\n", s->mb_x, s->mb_y); |
|
return -1; |
|
} |
|
|
|
s->cbp_table[xy]|= cbpy<<2; |
|
s->current_picture.f.mb_type[xy] |= ac_pred*MB_TYPE_ACPRED; |
|
}else{ /* P || S_TYPE */ |
|
if (IS_INTRA(s->current_picture.f.mb_type[xy])) { |
|
int dir=0,i; |
|
int ac_pred = get_bits1(&s->gb); |
|
int cbpy = get_vlc2(&s->gb, ff_h263_cbpy_vlc.table, CBPY_VLC_BITS, 1); |
|
|
|
if(cbpy<0){ |
|
av_log(s->avctx, AV_LOG_ERROR, "I cbpy corrupted at %d %d\n", s->mb_x, s->mb_y); |
|
return -1; |
|
} |
|
|
|
if(s->cbp_table[xy] & 8) { |
|
ff_set_qscale(s, s->qscale + quant_tab[get_bits(&s->gb, 2)]); |
|
} |
|
s->current_picture.f.qscale_table[xy] = s->qscale; |
|
|
|
for(i=0; i<6; i++){ |
|
int dc_pred_dir; |
|
int dc= mpeg4_decode_dc(s, i, &dc_pred_dir); |
|
if(dc < 0){ |
|
av_log(s->avctx, AV_LOG_ERROR, "DC corrupted at %d %d\n", s->mb_x, s->mb_y); |
|
return -1; |
|
} |
|
dir<<=1; |
|
if(dc_pred_dir) dir|=1; |
|
} |
|
s->cbp_table[xy]&= 3; //remove dquant |
|
s->cbp_table[xy]|= cbpy<<2; |
|
s->current_picture.f.mb_type[xy] |= ac_pred*MB_TYPE_ACPRED; |
|
s->pred_dir_table[xy]= dir; |
|
} else if (IS_SKIP(s->current_picture.f.mb_type[xy])) { |
|
s->current_picture.f.qscale_table[xy] = s->qscale; |
|
s->cbp_table[xy]= 0; |
|
}else{ |
|
int cbpy = get_vlc2(&s->gb, ff_h263_cbpy_vlc.table, CBPY_VLC_BITS, 1); |
|
|
|
if(cbpy<0){ |
|
av_log(s->avctx, AV_LOG_ERROR, "P cbpy corrupted at %d %d\n", s->mb_x, s->mb_y); |
|
return -1; |
|
} |
|
|
|
if(s->cbp_table[xy] & 8) { |
|
ff_set_qscale(s, s->qscale + quant_tab[get_bits(&s->gb, 2)]); |
|
} |
|
s->current_picture.f.qscale_table[xy] = s->qscale; |
|
|
|
s->cbp_table[xy]&= 3; //remove dquant |
|
s->cbp_table[xy]|= (cbpy^0xf)<<2; |
|
} |
|
} |
|
} |
|
if(mb_num >= mb_count) return 0; |
|
s->mb_x= 0; |
|
} |
|
return 0; |
|
} |
|
|
|
/** |
|
* Decode the first and second partition. |
|
* @return <0 if error (and sets error type in the error_status_table) |
|
*/ |
|
int ff_mpeg4_decode_partitions(MpegEncContext *s) |
|
{ |
|
int mb_num; |
|
const int part_a_error= s->pict_type==AV_PICTURE_TYPE_I ? (ER_DC_ERROR|ER_MV_ERROR) : ER_MV_ERROR; |
|
const int part_a_end = s->pict_type==AV_PICTURE_TYPE_I ? (ER_DC_END |ER_MV_END) : ER_MV_END; |
|
|
|
mb_num= mpeg4_decode_partition_a(s); |
|
if(mb_num<0){ |
|
ff_er_add_slice(s, s->resync_mb_x, s->resync_mb_y, s->mb_x, s->mb_y, part_a_error); |
|
return -1; |
|
} |
|
|
|
if(s->resync_mb_x + s->resync_mb_y*s->mb_width + mb_num > s->mb_num){ |
|
av_log(s->avctx, AV_LOG_ERROR, "slice below monitor ...\n"); |
|
ff_er_add_slice(s, s->resync_mb_x, s->resync_mb_y, s->mb_x, s->mb_y, part_a_error); |
|
return -1; |
|
} |
|
|
|
s->mb_num_left= mb_num; |
|
|
|
if(s->pict_type==AV_PICTURE_TYPE_I){ |
|
while(show_bits(&s->gb, 9) == 1) |
|
skip_bits(&s->gb, 9); |
|
if(get_bits_long(&s->gb, 19)!=DC_MARKER){ |
|
av_log(s->avctx, AV_LOG_ERROR, "marker missing after first I partition at %d %d\n", s->mb_x, s->mb_y); |
|
return -1; |
|
} |
|
}else{ |
|
while(show_bits(&s->gb, 10) == 1) |
|
skip_bits(&s->gb, 10); |
|
if(get_bits(&s->gb, 17)!=MOTION_MARKER){ |
|
av_log(s->avctx, AV_LOG_ERROR, "marker missing after first P partition at %d %d\n", s->mb_x, s->mb_y); |
|
return -1; |
|
} |
|
} |
|
ff_er_add_slice(s, s->resync_mb_x, s->resync_mb_y, s->mb_x-1, s->mb_y, part_a_end); |
|
|
|
if( mpeg4_decode_partition_b(s, mb_num) < 0){ |
|
if(s->pict_type==AV_PICTURE_TYPE_P) |
|
ff_er_add_slice(s, s->resync_mb_x, s->resync_mb_y, s->mb_x, s->mb_y, ER_DC_ERROR); |
|
return -1; |
|
}else{ |
|
if(s->pict_type==AV_PICTURE_TYPE_P) |
|
ff_er_add_slice(s, s->resync_mb_x, s->resync_mb_y, s->mb_x-1, s->mb_y, ER_DC_END); |
|
} |
|
|
|
return 0; |
|
} |
|
|
|
/** |
|
* Decode a block. |
|
* @return <0 if an error occurred |
|
*/ |
|
static inline int mpeg4_decode_block(MpegEncContext * s, DCTELEM * block, |
|
int n, int coded, int intra, int rvlc) |
|
{ |
|
int level, i, last, run; |
|
int dc_pred_dir; |
|
RLTable * rl; |
|
RL_VLC_ELEM * rl_vlc; |
|
const uint8_t * scan_table; |
|
int qmul, qadd; |
|
|
|
//Note intra & rvlc should be optimized away if this is inlined |
|
|
|
if(intra) { |
|
if(s->use_intra_dc_vlc){ |
|
/* DC coef */ |
|
if(s->partitioned_frame){ |
|
level = s->dc_val[0][ s->block_index[n] ]; |
|
if(n<4) level= FASTDIV((level + (s->y_dc_scale>>1)), s->y_dc_scale); |
|
else level= FASTDIV((level + (s->c_dc_scale>>1)), s->c_dc_scale); |
|
dc_pred_dir= (s->pred_dir_table[s->mb_x + s->mb_y*s->mb_stride]<<n)&32; |
|
}else{ |
|
level = mpeg4_decode_dc(s, n, &dc_pred_dir); |
|
if (level < 0) |
|
return -1; |
|
} |
|
block[0] = level; |
|
i = 0; |
|
}else{ |
|
i = -1; |
|
ff_mpeg4_pred_dc(s, n, 0, &dc_pred_dir, 0); |
|
} |
|
if (!coded) |
|
goto not_coded; |
|
|
|
if(rvlc){ |
|
rl = &rvlc_rl_intra; |
|
rl_vlc = rvlc_rl_intra.rl_vlc[0]; |
|
}else{ |
|
rl = &ff_mpeg4_rl_intra; |
|
rl_vlc = ff_mpeg4_rl_intra.rl_vlc[0]; |
|
} |
|
if (s->ac_pred) { |
|
if (dc_pred_dir == 0) |
|
scan_table = s->intra_v_scantable.permutated; /* left */ |
|
else |
|
scan_table = s->intra_h_scantable.permutated; /* top */ |
|
} else { |
|
scan_table = s->intra_scantable.permutated; |
|
} |
|
qmul=1; |
|
qadd=0; |
|
} else { |
|
i = -1; |
|
if (!coded) { |
|
s->block_last_index[n] = i; |
|
return 0; |
|
} |
|
if(rvlc) rl = &rvlc_rl_inter; |
|
else rl = &ff_h263_rl_inter; |
|
|
|
scan_table = s->intra_scantable.permutated; |
|
|
|
if(s->mpeg_quant){ |
|
qmul=1; |
|
qadd=0; |
|
if(rvlc){ |
|
rl_vlc = rvlc_rl_inter.rl_vlc[0]; |
|
}else{ |
|
rl_vlc = ff_h263_rl_inter.rl_vlc[0]; |
|
} |
|
}else{ |
|
qmul = s->qscale << 1; |
|
qadd = (s->qscale - 1) | 1; |
|
if(rvlc){ |
|
rl_vlc = rvlc_rl_inter.rl_vlc[s->qscale]; |
|
}else{ |
|
rl_vlc = ff_h263_rl_inter.rl_vlc[s->qscale]; |
|
} |
|
} |
|
} |
|
{ |
|
OPEN_READER(re, &s->gb); |
|
for(;;) { |
|
UPDATE_CACHE(re, &s->gb); |
|
GET_RL_VLC(level, run, re, &s->gb, rl_vlc, TEX_VLC_BITS, 2, 0); |
|
if (level==0) { |
|
/* escape */ |
|
if(rvlc){ |
|
if(SHOW_UBITS(re, &s->gb, 1)==0){ |
|
av_log(s->avctx, AV_LOG_ERROR, "1. marker bit missing in rvlc esc\n"); |
|
return -1; |
|
}; SKIP_CACHE(re, &s->gb, 1); |
|
|
|
last= SHOW_UBITS(re, &s->gb, 1); SKIP_CACHE(re, &s->gb, 1); |
|
run= SHOW_UBITS(re, &s->gb, 6); |
|
SKIP_COUNTER(re, &s->gb, 1+1+6); |
|
UPDATE_CACHE(re, &s->gb); |
|
|
|
if(SHOW_UBITS(re, &s->gb, 1)==0){ |
|
av_log(s->avctx, AV_LOG_ERROR, "2. marker bit missing in rvlc esc\n"); |
|
return -1; |
|
}; SKIP_CACHE(re, &s->gb, 1); |
|
|
|
level= SHOW_UBITS(re, &s->gb, 11); SKIP_CACHE(re, &s->gb, 11); |
|
|
|
if(SHOW_UBITS(re, &s->gb, 5)!=0x10){ |
|
av_log(s->avctx, AV_LOG_ERROR, "reverse esc missing\n"); |
|
return -1; |
|
}; SKIP_CACHE(re, &s->gb, 5); |
|
|
|
level= level * qmul + qadd; |
|
level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1); |
|
SKIP_COUNTER(re, &s->gb, 1+11+5+1); |
|
|
|
i+= run + 1; |
|
if(last) i+=192; |
|
}else{ |
|
int cache; |
|
cache= GET_CACHE(re, &s->gb); |
|
|
|
if(IS_3IV1) |
|
cache ^= 0xC0000000; |
|
|
|
if (cache&0x80000000) { |
|
if (cache&0x40000000) { |
|
/* third escape */ |
|
SKIP_CACHE(re, &s->gb, 2); |
|
last= SHOW_UBITS(re, &s->gb, 1); SKIP_CACHE(re, &s->gb, 1); |
|
run= SHOW_UBITS(re, &s->gb, 6); |
|
SKIP_COUNTER(re, &s->gb, 2+1+6); |
|
UPDATE_CACHE(re, &s->gb); |
|
|
|
if(IS_3IV1){ |
|
level= SHOW_SBITS(re, &s->gb, 12); LAST_SKIP_BITS(re, &s->gb, 12); |
|
}else{ |
|
if(SHOW_UBITS(re, &s->gb, 1)==0){ |
|
av_log(s->avctx, AV_LOG_ERROR, "1. marker bit missing in 3. esc\n"); |
|
return -1; |
|
}; SKIP_CACHE(re, &s->gb, 1); |
|
|
|
level= SHOW_SBITS(re, &s->gb, 12); SKIP_CACHE(re, &s->gb, 12); |
|
|
|
if(SHOW_UBITS(re, &s->gb, 1)==0){ |
|
av_log(s->avctx, AV_LOG_ERROR, "2. marker bit missing in 3. esc\n"); |
|
return -1; |
|
} |
|
|
|
SKIP_COUNTER(re, &s->gb, 1+12+1); |
|
} |
|
|
|
#if 0 |
|
if(s->error_recognition >= FF_ER_COMPLIANT){ |
|
const int abs_level= FFABS(level); |
|
if(abs_level<=MAX_LEVEL && run<=MAX_RUN){ |
|
const int run1= run - rl->max_run[last][abs_level] - 1; |
|
if(abs_level <= rl->max_level[last][run]){ |
|
av_log(s->avctx, AV_LOG_ERROR, "illegal 3. esc, vlc encoding possible\n"); |
|
return -1; |
|
} |
|
if(s->error_recognition > FF_ER_COMPLIANT){ |
|
if(abs_level <= rl->max_level[last][run]*2){ |
|
av_log(s->avctx, AV_LOG_ERROR, "illegal 3. esc, esc 1 encoding possible\n"); |
|
return -1; |
|
} |
|
if(run1 >= 0 && abs_level <= rl->max_level[last][run1]){ |
|
av_log(s->avctx, AV_LOG_ERROR, "illegal 3. esc, esc 2 encoding possible\n"); |
|
return -1; |
|
} |
|
} |
|
} |
|
} |
|
#endif |
|
if (level>0) level= level * qmul + qadd; |
|
else level= level * qmul - qadd; |
|
|
|
if((unsigned)(level + 2048) > 4095){ |
|
if(s->err_recognition & (AV_EF_BITSTREAM|AV_EF_AGGRESSIVE)){ |
|
if(level > 2560 || level<-2560){ |
|
av_log(s->avctx, AV_LOG_ERROR, "|level| overflow in 3. esc, qp=%d\n", s->qscale); |
|
return -1; |
|
} |
|
} |
|
level= level<0 ? -2048 : 2047; |
|
} |
|
|
|
i+= run + 1; |
|
if(last) i+=192; |
|
} else { |
|
/* second escape */ |
|
SKIP_BITS(re, &s->gb, 2); |
|
GET_RL_VLC(level, run, re, &s->gb, rl_vlc, TEX_VLC_BITS, 2, 1); |
|
i+= run + rl->max_run[run>>7][level/qmul] +1; //FIXME opt indexing |
|
level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1); |
|
LAST_SKIP_BITS(re, &s->gb, 1); |
|
} |
|
} else { |
|
/* first escape */ |
|
SKIP_BITS(re, &s->gb, 1); |
|
GET_RL_VLC(level, run, re, &s->gb, rl_vlc, TEX_VLC_BITS, 2, 1); |
|
i+= run; |
|
level = level + rl->max_level[run>>7][(run-1)&63] * qmul;//FIXME opt indexing |
|
level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1); |
|
LAST_SKIP_BITS(re, &s->gb, 1); |
|
} |
|
} |
|
} else { |
|
i+= run; |
|
level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1); |
|
LAST_SKIP_BITS(re, &s->gb, 1); |
|
} |
|
if (i > 62){ |
|
i-= 192; |
|
if(i&(~63)){ |
|
av_log(s->avctx, AV_LOG_ERROR, "ac-tex damaged at %d %d\n", s->mb_x, s->mb_y); |
|
return -1; |
|
} |
|
|
|
block[scan_table[i]] = level; |
|
break; |
|
} |
|
|
|
block[scan_table[i]] = level; |
|
} |
|
CLOSE_READER(re, &s->gb); |
|
} |
|
not_coded: |
|
if (intra) { |
|
if(!s->use_intra_dc_vlc){ |
|
block[0] = ff_mpeg4_pred_dc(s, n, block[0], &dc_pred_dir, 0); |
|
|
|
i -= i>>31; //if(i == -1) i=0; |
|
} |
|
|
|
mpeg4_pred_ac(s, block, n, dc_pred_dir); |
|
if (s->ac_pred) { |
|
i = 63; /* XXX: not optimal */ |
|
} |
|
} |
|
s->block_last_index[n] = i; |
|
return 0; |
|
} |
|
|
|
/** |
|
* decode partition C of one MB. |
|
* @return <0 if an error occurred |
|
*/ |
|
static int mpeg4_decode_partitioned_mb(MpegEncContext *s, DCTELEM block[6][64]) |
|
{ |
|
int cbp, mb_type; |
|
const int xy= s->mb_x + s->mb_y*s->mb_stride; |
|
|
|
mb_type = s->current_picture.f.mb_type[xy]; |
|
cbp = s->cbp_table[xy]; |
|
|
|
s->use_intra_dc_vlc= s->qscale < s->intra_dc_threshold; |
|
|
|
if (s->current_picture.f.qscale_table[xy] != s->qscale) { |
|
ff_set_qscale(s, s->current_picture.f.qscale_table[xy]); |
|
} |
|
|
|
if (s->pict_type == AV_PICTURE_TYPE_P || s->pict_type==AV_PICTURE_TYPE_S) { |
|
int i; |
|
for(i=0; i<4; i++){ |
|
s->mv[0][i][0] = s->current_picture.f.motion_val[0][s->block_index[i]][0]; |
|
s->mv[0][i][1] = s->current_picture.f.motion_val[0][s->block_index[i]][1]; |
|
} |
|
s->mb_intra = IS_INTRA(mb_type); |
|
|
|
if (IS_SKIP(mb_type)) { |
|
/* skip mb */ |
|
for(i=0;i<6;i++) |
|
s->block_last_index[i] = -1; |
|
s->mv_dir = MV_DIR_FORWARD; |
|
s->mv_type = MV_TYPE_16X16; |
|
if(s->pict_type==AV_PICTURE_TYPE_S && s->vol_sprite_usage==GMC_SPRITE){ |
|
s->mcsel=1; |
|
s->mb_skipped = 0; |
|
}else{ |
|
s->mcsel=0; |
|
s->mb_skipped = 1; |
|
} |
|
}else if(s->mb_intra){ |
|
s->ac_pred = IS_ACPRED(s->current_picture.f.mb_type[xy]); |
|
}else if(!s->mb_intra){ |
|
// s->mcsel= 0; //FIXME do we need to init that |
|
|
|
s->mv_dir = MV_DIR_FORWARD; |
|
if (IS_8X8(mb_type)) { |
|
s->mv_type = MV_TYPE_8X8; |
|
} else { |
|
s->mv_type = MV_TYPE_16X16; |
|
} |
|
} |
|
} else { /* I-Frame */ |
|
s->mb_intra = 1; |
|
s->ac_pred = IS_ACPRED(s->current_picture.f.mb_type[xy]); |
|
} |
|
|
|
if (!IS_SKIP(mb_type)) { |
|
int i; |
|
s->dsp.clear_blocks(s->block[0]); |
|
/* decode each block */ |
|
for (i = 0; i < 6; i++) { |
|
if(mpeg4_decode_block(s, block[i], i, cbp&32, s->mb_intra, s->rvlc) < 0){ |
|
av_log(s->avctx, AV_LOG_ERROR, "texture corrupted at %d %d %d\n", s->mb_x, s->mb_y, s->mb_intra); |
|
return -1; |
|
} |
|
cbp+=cbp; |
|
} |
|
} |
|
|
|
/* per-MB end of slice check */ |
|
|
|
if(--s->mb_num_left <= 0){ |
|
if(mpeg4_is_resync(s)) |
|
return SLICE_END; |
|
else |
|
return SLICE_NOEND; |
|
}else{ |
|
if(mpeg4_is_resync(s)){ |
|
const int delta= s->mb_x + 1 == s->mb_width ? 2 : 1; |
|
if(s->cbp_table[xy+delta]) |
|
return SLICE_END; |
|
} |
|
return SLICE_OK; |
|
} |
|
} |
|
|
|
static int mpeg4_decode_mb(MpegEncContext *s, |
|
DCTELEM block[6][64]) |
|
{ |
|
int cbpc, cbpy, i, cbp, pred_x, pred_y, mx, my, dquant; |
|
int16_t *mot_val; |
|
static int8_t quant_tab[4] = { -1, -2, 1, 2 }; |
|
const int xy= s->mb_x + s->mb_y * s->mb_stride; |
|
|
|
assert(s->h263_pred); |
|
|
|
if (s->pict_type == AV_PICTURE_TYPE_P || s->pict_type==AV_PICTURE_TYPE_S) { |
|
do{ |
|
if (get_bits1(&s->gb)) { |
|
/* skip mb */ |
|
s->mb_intra = 0; |
|
for(i=0;i<6;i++) |
|
s->block_last_index[i] = -1; |
|
s->mv_dir = MV_DIR_FORWARD; |
|
s->mv_type = MV_TYPE_16X16; |
|
if(s->pict_type==AV_PICTURE_TYPE_S && s->vol_sprite_usage==GMC_SPRITE){ |
|
s->current_picture.f.mb_type[xy] = MB_TYPE_SKIP | MB_TYPE_GMC | MB_TYPE_16x16 | MB_TYPE_L0; |
|
s->mcsel=1; |
|
s->mv[0][0][0]= get_amv(s, 0); |
|
s->mv[0][0][1]= get_amv(s, 1); |
|
|
|
s->mb_skipped = 0; |
|
}else{ |
|
s->current_picture.f.mb_type[xy] = MB_TYPE_SKIP | MB_TYPE_16x16 | MB_TYPE_L0; |
|
s->mcsel=0; |
|
s->mv[0][0][0] = 0; |
|
s->mv[0][0][1] = 0; |
|
s->mb_skipped = 1; |
|
} |
|
goto end; |
|
} |
|
cbpc = get_vlc2(&s->gb, ff_h263_inter_MCBPC_vlc.table, INTER_MCBPC_VLC_BITS, 2); |
|
if (cbpc < 0){ |
|
av_log(s->avctx, AV_LOG_ERROR, "cbpc damaged at %d %d\n", s->mb_x, s->mb_y); |
|
return -1; |
|
} |
|
}while(cbpc == 20); |
|
|
|
s->dsp.clear_blocks(s->block[0]); |
|
dquant = cbpc & 8; |
|
s->mb_intra = ((cbpc & 4) != 0); |
|
if (s->mb_intra) goto intra; |
|
|
|
if(s->pict_type==AV_PICTURE_TYPE_S && s->vol_sprite_usage==GMC_SPRITE && (cbpc & 16) == 0) |
|
s->mcsel= get_bits1(&s->gb); |
|
else s->mcsel= 0; |
|
cbpy = get_vlc2(&s->gb, ff_h263_cbpy_vlc.table, CBPY_VLC_BITS, 1) ^ 0x0F; |
|
|
|
cbp = (cbpc & 3) | (cbpy << 2); |
|
if (dquant) { |
|
ff_set_qscale(s, s->qscale + quant_tab[get_bits(&s->gb, 2)]); |
|
} |
|
if((!s->progressive_sequence) && (cbp || (s->workaround_bugs&FF_BUG_XVID_ILACE))) |
|
s->interlaced_dct= get_bits1(&s->gb); |
|
|
|
s->mv_dir = MV_DIR_FORWARD; |
|
if ((cbpc & 16) == 0) { |
|
if(s->mcsel){ |
|
s->current_picture.f.mb_type[xy] = MB_TYPE_GMC | MB_TYPE_16x16 | MB_TYPE_L0; |
|
/* 16x16 global motion prediction */ |
|
s->mv_type = MV_TYPE_16X16; |
|
mx= get_amv(s, 0); |
|
my= get_amv(s, 1); |
|
s->mv[0][0][0] = mx; |
|
s->mv[0][0][1] = my; |
|
}else if((!s->progressive_sequence) && get_bits1(&s->gb)){ |
|
s->current_picture.f.mb_type[xy] = MB_TYPE_16x8 | MB_TYPE_L0 | MB_TYPE_INTERLACED; |
|
/* 16x8 field motion prediction */ |
|
s->mv_type= MV_TYPE_FIELD; |
|
|
|
s->field_select[0][0]= get_bits1(&s->gb); |
|
s->field_select[0][1]= get_bits1(&s->gb); |
|
|
|
h263_pred_motion(s, 0, 0, &pred_x, &pred_y); |
|
|
|
for(i=0; i<2; i++){ |
|
mx = h263_decode_motion(s, pred_x, s->f_code); |
|
if (mx >= 0xffff) |
|
return -1; |
|
|
|
my = h263_decode_motion(s, pred_y/2, s->f_code); |
|
if (my >= 0xffff) |
|
return -1; |
|
|
|
s->mv[0][i][0] = mx; |
|
s->mv[0][i][1] = my; |
|
} |
|
}else{ |
|
s->current_picture.f.mb_type[xy] = MB_TYPE_16x16 | MB_TYPE_L0; |
|
/* 16x16 motion prediction */ |
|
s->mv_type = MV_TYPE_16X16; |
|
h263_pred_motion(s, 0, 0, &pred_x, &pred_y); |
|
mx = h263_decode_motion(s, pred_x, s->f_code); |
|
|
|
if (mx >= 0xffff) |
|
return -1; |
|
|
|
my = h263_decode_motion(s, pred_y, s->f_code); |
|
|
|
if (my >= 0xffff) |
|
return -1; |
|
s->mv[0][0][0] = mx; |
|
s->mv[0][0][1] = my; |
|
} |
|
} else { |
|
s->current_picture.f.mb_type[xy] = MB_TYPE_8x8 | MB_TYPE_L0; |
|
s->mv_type = MV_TYPE_8X8; |
|
for(i=0;i<4;i++) { |
|
mot_val = h263_pred_motion(s, i, 0, &pred_x, &pred_y); |
|
mx = h263_decode_motion(s, pred_x, s->f_code); |
|
if (mx >= 0xffff) |
|
return -1; |
|
|
|
my = h263_decode_motion(s, pred_y, s->f_code); |
|
if (my >= 0xffff) |
|
return -1; |
|
s->mv[0][i][0] = mx; |
|
s->mv[0][i][1] = my; |
|
mot_val[0] = mx; |
|
mot_val[1] = my; |
|
} |
|
} |
|
} else if(s->pict_type==AV_PICTURE_TYPE_B) { |
|
int modb1; // first bit of modb |
|
int modb2; // second bit of modb |
|
int mb_type; |
|
|
|
s->mb_intra = 0; //B-frames never contain intra blocks |
|
s->mcsel=0; // ... true gmc blocks |
|
|
|
if(s->mb_x==0){ |
|
for(i=0; i<2; i++){ |
|
s->last_mv[i][0][0]= |
|
s->last_mv[i][0][1]= |
|
s->last_mv[i][1][0]= |
|
s->last_mv[i][1][1]= 0; |
|
} |
|
|
|
ff_thread_await_progress((AVFrame*)s->next_picture_ptr, s->mb_y, 0); |
|
} |
|
|
|
/* if we skipped it in the future P Frame than skip it now too */ |
|
s->mb_skipped = s->next_picture.f.mbskip_table[s->mb_y * s->mb_stride + s->mb_x]; // Note, skiptab=0 if last was GMC |
|
|
|
if(s->mb_skipped){ |
|
/* skip mb */ |
|
for(i=0;i<6;i++) |
|
s->block_last_index[i] = -1; |
|
|
|
s->mv_dir = MV_DIR_FORWARD; |
|
s->mv_type = MV_TYPE_16X16; |
|
s->mv[0][0][0] = 0; |
|
s->mv[0][0][1] = 0; |
|
s->mv[1][0][0] = 0; |
|
s->mv[1][0][1] = 0; |
|
s->current_picture.f.mb_type[xy] = MB_TYPE_SKIP | MB_TYPE_16x16 | MB_TYPE_L0; |
|
goto end; |
|
} |
|
|
|
modb1= get_bits1(&s->gb); |
|
if(modb1){ |
|
mb_type= MB_TYPE_DIRECT2 | MB_TYPE_SKIP | MB_TYPE_L0L1; //like MB_TYPE_B_DIRECT but no vectors coded |
|
cbp=0; |
|
}else{ |
|
modb2= get_bits1(&s->gb); |
|
mb_type= get_vlc2(&s->gb, mb_type_b_vlc.table, MB_TYPE_B_VLC_BITS, 1); |
|
if(mb_type<0){ |
|
av_log(s->avctx, AV_LOG_ERROR, "illegal MB_type\n"); |
|
return -1; |
|
} |
|
mb_type= mb_type_b_map[ mb_type ]; |
|
if(modb2) cbp= 0; |
|
else{ |
|
s->dsp.clear_blocks(s->block[0]); |
|
cbp= get_bits(&s->gb, 6); |
|
} |
|
|
|
if ((!IS_DIRECT(mb_type)) && cbp) { |
|
if(get_bits1(&s->gb)){ |
|
ff_set_qscale(s, s->qscale + get_bits1(&s->gb)*4 - 2); |
|
} |
|
} |
|
|
|
if(!s->progressive_sequence){ |
|
if(cbp) |
|
s->interlaced_dct= get_bits1(&s->gb); |
|
|
|
if(!IS_DIRECT(mb_type) && get_bits1(&s->gb)){ |
|
mb_type |= MB_TYPE_16x8 | MB_TYPE_INTERLACED; |
|
mb_type &= ~MB_TYPE_16x16; |
|
|
|
if(USES_LIST(mb_type, 0)){ |
|
s->field_select[0][0]= get_bits1(&s->gb); |
|
s->field_select[0][1]= get_bits1(&s->gb); |
|
} |
|
if(USES_LIST(mb_type, 1)){ |
|
s->field_select[1][0]= get_bits1(&s->gb); |
|
s->field_select[1][1]= get_bits1(&s->gb); |
|
} |
|
} |
|
} |
|
|
|
s->mv_dir = 0; |
|
if((mb_type & (MB_TYPE_DIRECT2|MB_TYPE_INTERLACED)) == 0){ |
|
s->mv_type= MV_TYPE_16X16; |
|
|
|
if(USES_LIST(mb_type, 0)){ |
|
s->mv_dir = MV_DIR_FORWARD; |
|
|
|
mx = h263_decode_motion(s, s->last_mv[0][0][0], s->f_code); |
|
my = h263_decode_motion(s, s->last_mv[0][0][1], s->f_code); |
|
s->last_mv[0][1][0]= s->last_mv[0][0][0]= s->mv[0][0][0] = mx; |
|
s->last_mv[0][1][1]= s->last_mv[0][0][1]= s->mv[0][0][1] = my; |
|
} |
|
|
|
if(USES_LIST(mb_type, 1)){ |
|
s->mv_dir |= MV_DIR_BACKWARD; |
|
|
|
mx = h263_decode_motion(s, s->last_mv[1][0][0], s->b_code); |
|
my = h263_decode_motion(s, s->last_mv[1][0][1], s->b_code); |
|
s->last_mv[1][1][0]= s->last_mv[1][0][0]= s->mv[1][0][0] = mx; |
|
s->last_mv[1][1][1]= s->last_mv[1][0][1]= s->mv[1][0][1] = my; |
|
} |
|
}else if(!IS_DIRECT(mb_type)){ |
|
s->mv_type= MV_TYPE_FIELD; |
|
|
|
if(USES_LIST(mb_type, 0)){ |
|
s->mv_dir = MV_DIR_FORWARD; |
|
|
|
for(i=0; i<2; i++){ |
|
mx = h263_decode_motion(s, s->last_mv[0][i][0] , s->f_code); |
|
my = h263_decode_motion(s, s->last_mv[0][i][1]/2, s->f_code); |
|
s->last_mv[0][i][0]= s->mv[0][i][0] = mx; |
|
s->last_mv[0][i][1]= (s->mv[0][i][1] = my)*2; |
|
} |
|
} |
|
|
|
if(USES_LIST(mb_type, 1)){ |
|
s->mv_dir |= MV_DIR_BACKWARD; |
|
|
|
for(i=0; i<2; i++){ |
|
mx = h263_decode_motion(s, s->last_mv[1][i][0] , s->b_code); |
|
my = h263_decode_motion(s, s->last_mv[1][i][1]/2, s->b_code); |
|
s->last_mv[1][i][0]= s->mv[1][i][0] = mx; |
|
s->last_mv[1][i][1]= (s->mv[1][i][1] = my)*2; |
|
} |
|
} |
|
} |
|
} |
|
|
|
if(IS_DIRECT(mb_type)){ |
|
if(IS_SKIP(mb_type)) |
|
mx=my=0; |
|
else{ |
|
mx = h263_decode_motion(s, 0, 1); |
|
my = h263_decode_motion(s, 0, 1); |
|
} |
|
|
|
s->mv_dir = MV_DIR_FORWARD | MV_DIR_BACKWARD | MV_DIRECT; |
|
mb_type |= ff_mpeg4_set_direct_mv(s, mx, my); |
|
} |
|
s->current_picture.f.mb_type[xy] = mb_type; |
|
} else { /* I-Frame */ |
|
do{ |
|
cbpc = get_vlc2(&s->gb, ff_h263_intra_MCBPC_vlc.table, INTRA_MCBPC_VLC_BITS, 2); |
|
if (cbpc < 0){ |
|
av_log(s->avctx, AV_LOG_ERROR, "I cbpc damaged at %d %d\n", s->mb_x, s->mb_y); |
|
return -1; |
|
} |
|
}while(cbpc == 8); |
|
|
|
dquant = cbpc & 4; |
|
s->mb_intra = 1; |
|
intra: |
|
s->ac_pred = get_bits1(&s->gb); |
|
if(s->ac_pred) |
|
s->current_picture.f.mb_type[xy] = MB_TYPE_INTRA | MB_TYPE_ACPRED; |
|
else |
|
s->current_picture.f.mb_type[xy] = MB_TYPE_INTRA; |
|
|
|
cbpy = get_vlc2(&s->gb, ff_h263_cbpy_vlc.table, CBPY_VLC_BITS, 1); |
|
if(cbpy<0){ |
|
av_log(s->avctx, AV_LOG_ERROR, "I cbpy damaged at %d %d\n", s->mb_x, s->mb_y); |
|
return -1; |
|
} |
|
cbp = (cbpc & 3) | (cbpy << 2); |
|
|
|
s->use_intra_dc_vlc= s->qscale < s->intra_dc_threshold; |
|
|
|
if (dquant) { |
|
ff_set_qscale(s, s->qscale + quant_tab[get_bits(&s->gb, 2)]); |
|
} |
|
|
|
if(!s->progressive_sequence) |
|
s->interlaced_dct= get_bits1(&s->gb); |
|
|
|
s->dsp.clear_blocks(s->block[0]); |
|
/* decode each block */ |
|
for (i = 0; i < 6; i++) { |
|
if (mpeg4_decode_block(s, block[i], i, cbp&32, 1, 0) < 0) |
|
return -1; |
|
cbp+=cbp; |
|
} |
|
goto end; |
|
} |
|
|
|
/* decode each block */ |
|
for (i = 0; i < 6; i++) { |
|
if (mpeg4_decode_block(s, block[i], i, cbp&32, 0, 0) < 0) |
|
return -1; |
|
cbp+=cbp; |
|
} |
|
end: |
|
|
|
/* per-MB end of slice check */ |
|
if(s->codec_id==CODEC_ID_MPEG4){ |
|
int next= mpeg4_is_resync(s); |
|
if(next) { |
|
if (s->mb_x + s->mb_y*s->mb_width + 1 > next && (s->avctx->err_recognition & AV_EF_AGGRESSIVE)) { |
|
return -1; |
|
} else if (s->mb_x + s->mb_y*s->mb_width + 1 >= next) |
|
return SLICE_END; |
|
|
|
if(s->pict_type==AV_PICTURE_TYPE_B){ |
|
const int delta= s->mb_x + 1 == s->mb_width ? 2 : 1; |
|
ff_thread_await_progress((AVFrame*)s->next_picture_ptr, |
|
(s->mb_x + delta >= s->mb_width) ? FFMIN(s->mb_y+1, s->mb_height-1) : s->mb_y, 0); |
|
if (s->next_picture.f.mbskip_table[xy + delta]) |
|
return SLICE_OK; |
|
} |
|
|
|
return SLICE_END; |
|
} |
|
} |
|
|
|
return SLICE_OK; |
|
} |
|
|
|
|
|
static int mpeg4_decode_gop_header(MpegEncContext * s, GetBitContext *gb){ |
|
int hours, minutes, seconds; |
|
|
|
if(!show_bits(gb, 23)){ |
|
av_log(s->avctx, AV_LOG_WARNING, "GOP header invalid\n"); |
|
return -1; |
|
} |
|
|
|
hours= get_bits(gb, 5); |
|
minutes= get_bits(gb, 6); |
|
skip_bits1(gb); |
|
seconds= get_bits(gb, 6); |
|
|
|
s->time_base= seconds + 60*(minutes + 60*hours); |
|
|
|
skip_bits1(gb); |
|
skip_bits1(gb); |
|
|
|
return 0; |
|
} |
|
|
|
static int mpeg4_decode_profile_level(MpegEncContext * s, GetBitContext *gb){ |
|
|
|
s->avctx->profile = get_bits(gb, 4); |
|
s->avctx->level = get_bits(gb, 4); |
|
|
|
// for Simple profile, level 0 |
|
if (s->avctx->profile == 0 && s->avctx->level == 8) { |
|
s->avctx->level = 0; |
|
} |
|
|
|
return 0; |
|
} |
|
|
|
static int decode_vol_header(MpegEncContext *s, GetBitContext *gb){ |
|
int width, height, vo_ver_id; |
|
|
|
/* vol header */ |
|
skip_bits(gb, 1); /* random access */ |
|
s->vo_type= get_bits(gb, 8); |
|
if (get_bits1(gb) != 0) { /* is_ol_id */ |
|
vo_ver_id = get_bits(gb, 4); /* vo_ver_id */ |
|
skip_bits(gb, 3); /* vo_priority */ |
|
} else { |
|
vo_ver_id = 1; |
|
} |
|
s->aspect_ratio_info= get_bits(gb, 4); |
|
if(s->aspect_ratio_info == FF_ASPECT_EXTENDED){ |
|
s->avctx->sample_aspect_ratio.num= get_bits(gb, 8); // par_width |
|
s->avctx->sample_aspect_ratio.den= get_bits(gb, 8); // par_height |
|
}else{ |
|
s->avctx->sample_aspect_ratio= ff_h263_pixel_aspect[s->aspect_ratio_info]; |
|
} |
|
|
|
if ((s->vol_control_parameters=get_bits1(gb))) { /* vol control parameter */ |
|
int chroma_format= get_bits(gb, 2); |
|
if(chroma_format!=CHROMA_420){ |
|
av_log(s->avctx, AV_LOG_ERROR, "illegal chroma format\n"); |
|
} |
|
s->low_delay= get_bits1(gb); |
|
if(get_bits1(gb)){ /* vbv parameters */ |
|
get_bits(gb, 15); /* first_half_bitrate */ |
|
skip_bits1(gb); /* marker */ |
|
get_bits(gb, 15); /* latter_half_bitrate */ |
|
skip_bits1(gb); /* marker */ |
|
get_bits(gb, 15); /* first_half_vbv_buffer_size */ |
|
skip_bits1(gb); /* marker */ |
|
get_bits(gb, 3); /* latter_half_vbv_buffer_size */ |
|
get_bits(gb, 11); /* first_half_vbv_occupancy */ |
|
skip_bits1(gb); /* marker */ |
|
get_bits(gb, 15); /* latter_half_vbv_occupancy */ |
|
skip_bits1(gb); /* marker */ |
|
} |
|
}else{ |
|
// set low delay flag only once the smartest? low delay detection won't be overriden |
|
if(s->picture_number==0) |
|
s->low_delay=0; |
|
} |
|
|
|
s->shape = get_bits(gb, 2); /* vol shape */ |
|
if(s->shape != RECT_SHAPE) av_log(s->avctx, AV_LOG_ERROR, "only rectangular vol supported\n"); |
|
if(s->shape == GRAY_SHAPE && vo_ver_id != 1){ |
|
av_log(s->avctx, AV_LOG_ERROR, "Gray shape not supported\n"); |
|
skip_bits(gb, 4); //video_object_layer_shape_extension |
|
} |
|
|
|
check_marker(gb, "before time_increment_resolution"); |
|
|
|
s->avctx->time_base.den = get_bits(gb, 16); |
|
if(!s->avctx->time_base.den){ |
|
av_log(s->avctx, AV_LOG_ERROR, "time_base.den==0\n"); |
|
s->avctx->time_base.num = 0; |
|
return -1; |
|
} |
|
|
|
s->time_increment_bits = av_log2(s->avctx->time_base.den - 1) + 1; |
|
if (s->time_increment_bits < 1) |
|
s->time_increment_bits = 1; |
|
|
|
check_marker(gb, "before fixed_vop_rate"); |
|
|
|
if (get_bits1(gb) != 0) { /* fixed_vop_rate */ |
|
s->avctx->time_base.num = get_bits(gb, s->time_increment_bits); |
|
}else |
|
s->avctx->time_base.num = 1; |
|
|
|
s->t_frame=0; |
|
|
|
if (s->shape != BIN_ONLY_SHAPE) { |
|
if (s->shape == RECT_SHAPE) { |
|
skip_bits1(gb); /* marker */ |
|
width = get_bits(gb, 13); |
|
skip_bits1(gb); /* marker */ |
|
height = get_bits(gb, 13); |
|
skip_bits1(gb); /* marker */ |
|
if(width && height && !(s->width && s->codec_tag == AV_RL32("MP4S"))){ /* they should be non zero but who knows ... */ |
|
s->width = width; |
|
s->height = height; |
|
} |
|
} |
|
|
|
s->progressive_sequence= |
|
s->progressive_frame= get_bits1(gb)^1; |
|
s->interlaced_dct=0; |
|
if(!get_bits1(gb) && (s->avctx->debug & FF_DEBUG_PICT_INFO)) |
|
av_log(s->avctx, AV_LOG_INFO, "MPEG4 OBMC not supported (very likely buggy encoder)\n"); /* OBMC Disable */ |
|
if (vo_ver_id == 1) { |
|
s->vol_sprite_usage = get_bits1(gb); /* vol_sprite_usage */ |
|
} else { |
|
s->vol_sprite_usage = get_bits(gb, 2); /* vol_sprite_usage */ |
|
} |
|
if(s->vol_sprite_usage==STATIC_SPRITE) av_log(s->avctx, AV_LOG_ERROR, "Static Sprites not supported\n"); |
|
if(s->vol_sprite_usage==STATIC_SPRITE || s->vol_sprite_usage==GMC_SPRITE){ |
|
if(s->vol_sprite_usage==STATIC_SPRITE){ |
|
s->sprite_width = get_bits(gb, 13); |
|
skip_bits1(gb); /* marker */ |
|
s->sprite_height= get_bits(gb, 13); |
|
skip_bits1(gb); /* marker */ |
|
s->sprite_left = get_bits(gb, 13); |
|
skip_bits1(gb); /* marker */ |
|
s->sprite_top = get_bits(gb, 13); |
|
skip_bits1(gb); /* marker */ |
|
} |
|
s->num_sprite_warping_points= get_bits(gb, 6); |
|
if(s->num_sprite_warping_points > 3){ |
|
av_log(s->avctx, AV_LOG_ERROR, "%d sprite_warping_points\n", s->num_sprite_warping_points); |
|
s->num_sprite_warping_points= 0; |
|
return -1; |
|
} |
|
s->sprite_warping_accuracy = get_bits(gb, 2); |
|
s->sprite_brightness_change= get_bits1(gb); |
|
if(s->vol_sprite_usage==STATIC_SPRITE) |
|
s->low_latency_sprite= get_bits1(gb); |
|
} |
|
// FIXME sadct disable bit if verid!=1 && shape not rect |
|
|
|
if (get_bits1(gb) == 1) { /* not_8_bit */ |
|
s->quant_precision = get_bits(gb, 4); /* quant_precision */ |
|
if(get_bits(gb, 4)!=8) av_log(s->avctx, AV_LOG_ERROR, "N-bit not supported\n"); /* bits_per_pixel */ |
|
if(s->quant_precision!=5) av_log(s->avctx, AV_LOG_ERROR, "quant precision %d\n", s->quant_precision); |
|
} else { |
|
s->quant_precision = 5; |
|
} |
|
|
|
// FIXME a bunch of grayscale shape things |
|
|
|
if((s->mpeg_quant=get_bits1(gb))){ /* vol_quant_type */ |
|
int i, v; |
|
|
|
/* load default matrixes */ |
|
for(i=0; i<64; i++){ |
|
int j= s->dsp.idct_permutation[i]; |
|
v= ff_mpeg4_default_intra_matrix[i]; |
|
s->intra_matrix[j]= v; |
|
s->chroma_intra_matrix[j]= v; |
|
|
|
v= ff_mpeg4_default_non_intra_matrix[i]; |
|
s->inter_matrix[j]= v; |
|
s->chroma_inter_matrix[j]= v; |
|
} |
|
|
|
/* load custom intra matrix */ |
|
if(get_bits1(gb)){ |
|
int last=0; |
|
for(i=0; i<64; i++){ |
|
int j; |
|
v= get_bits(gb, 8); |
|
if(v==0) break; |
|
|
|
last= v; |
|
j= s->dsp.idct_permutation[ ff_zigzag_direct[i] ]; |
|
s->intra_matrix[j]= v; |
|
s->chroma_intra_matrix[j]= v; |
|
} |
|
|
|
/* replicate last value */ |
|
for(; i<64; i++){ |
|
int j= s->dsp.idct_permutation[ ff_zigzag_direct[i] ]; |
|
s->intra_matrix[j]= last; |
|
s->chroma_intra_matrix[j]= last; |
|
} |
|
} |
|
|
|
/* load custom non intra matrix */ |
|
if(get_bits1(gb)){ |
|
int last=0; |
|
for(i=0; i<64; i++){ |
|
int j; |
|
v= get_bits(gb, 8); |
|
if(v==0) break; |
|
|
|
last= v; |
|
j= s->dsp.idct_permutation[ ff_zigzag_direct[i] ]; |
|
s->inter_matrix[j]= v; |
|
s->chroma_inter_matrix[j]= v; |
|
} |
|
|
|
/* replicate last value */ |
|
for(; i<64; i++){ |
|
int j= s->dsp.idct_permutation[ ff_zigzag_direct[i] ]; |
|
s->inter_matrix[j]= last; |
|
s->chroma_inter_matrix[j]= last; |
|
} |
|
} |
|
|
|
// FIXME a bunch of grayscale shape things |
|
} |
|
|
|
if(vo_ver_id != 1) |
|
s->quarter_sample= get_bits1(gb); |
|
else s->quarter_sample=0; |
|
|
|
if(!get_bits1(gb)){ |
|
int pos= get_bits_count(gb); |
|
int estimation_method= get_bits(gb, 2); |
|
if(estimation_method<2){ |
|
if(!get_bits1(gb)){ |
|
s->cplx_estimation_trash_i += 8*get_bits1(gb); //opaque |
|
s->cplx_estimation_trash_i += 8*get_bits1(gb); //transparent |
|
s->cplx_estimation_trash_i += 8*get_bits1(gb); //intra_cae |
|
s->cplx_estimation_trash_i += 8*get_bits1(gb); //inter_cae |
|
s->cplx_estimation_trash_i += 8*get_bits1(gb); //no_update |
|
s->cplx_estimation_trash_i += 8*get_bits1(gb); //upampling |
|
} |
|
if(!get_bits1(gb)){ |
|
s->cplx_estimation_trash_i += 8*get_bits1(gb); //intra_blocks |
|
s->cplx_estimation_trash_p += 8*get_bits1(gb); //inter_blocks |
|
s->cplx_estimation_trash_p += 8*get_bits1(gb); //inter4v_blocks |
|
s->cplx_estimation_trash_i += 8*get_bits1(gb); //not coded blocks |
|
} |
|
if(!check_marker(gb, "in complexity estimation part 1")){ |
|
skip_bits_long(gb, pos - get_bits_count(gb)); |
|
goto no_cplx_est; |
|
} |
|
if(!get_bits1(gb)){ |
|
s->cplx_estimation_trash_i += 8*get_bits1(gb); //dct_coeffs |
|
s->cplx_estimation_trash_i += 8*get_bits1(gb); //dct_lines |
|
s->cplx_estimation_trash_i += 8*get_bits1(gb); //vlc_syms |
|
s->cplx_estimation_trash_i += 4*get_bits1(gb); //vlc_bits |
|
} |
|
if(!get_bits1(gb)){ |
|
s->cplx_estimation_trash_p += 8*get_bits1(gb); //apm |
|
s->cplx_estimation_trash_p += 8*get_bits1(gb); //npm |
|
s->cplx_estimation_trash_b += 8*get_bits1(gb); //interpolate_mc_q |
|
s->cplx_estimation_trash_p += 8*get_bits1(gb); //forwback_mc_q |
|
s->cplx_estimation_trash_p += 8*get_bits1(gb); //halfpel2 |
|
s->cplx_estimation_trash_p += 8*get_bits1(gb); //halfpel4 |
|
} |
|
if(!check_marker(gb, "in complexity estimation part 2")){ |
|
skip_bits_long(gb, pos - get_bits_count(gb)); |
|
goto no_cplx_est; |
|
} |
|
if(estimation_method==1){ |
|
s->cplx_estimation_trash_i += 8*get_bits1(gb); //sadct |
|
s->cplx_estimation_trash_p += 8*get_bits1(gb); //qpel |
|
} |
|
}else |
|
av_log(s->avctx, AV_LOG_ERROR, "Invalid Complexity estimation method %d\n", estimation_method); |
|
}else{ |
|
no_cplx_est: |
|
s->cplx_estimation_trash_i= |
|
s->cplx_estimation_trash_p= |
|
s->cplx_estimation_trash_b= 0; |
|
} |
|
|
|
s->resync_marker= !get_bits1(gb); /* resync_marker_disabled */ |
|
|
|
s->data_partitioning= get_bits1(gb); |
|
if(s->data_partitioning){ |
|
s->rvlc= get_bits1(gb); |
|
} |
|
|
|
if(vo_ver_id != 1) { |
|
s->new_pred= get_bits1(gb); |
|
if(s->new_pred){ |
|
av_log(s->avctx, AV_LOG_ERROR, "new pred not supported\n"); |
|
skip_bits(gb, 2); /* requested upstream message type */ |
|
skip_bits1(gb); /* newpred segment type */ |
|
} |
|
s->reduced_res_vop= get_bits1(gb); |
|
if(s->reduced_res_vop) av_log(s->avctx, AV_LOG_ERROR, "reduced resolution VOP not supported\n"); |
|
} |
|
else{ |
|
s->new_pred=0; |
|
s->reduced_res_vop= 0; |
|
} |
|
|
|
s->scalability= get_bits1(gb); |
|
|
|
if (s->scalability) { |
|
GetBitContext bak= *gb; |
|
int h_sampling_factor_n; |
|
int h_sampling_factor_m; |
|
int v_sampling_factor_n; |
|
int v_sampling_factor_m; |
|
|
|
s->hierachy_type= get_bits1(gb); |
|
skip_bits(gb, 4); /* ref_layer_id */ |
|
skip_bits1(gb); /* ref_layer_sampling_dir */ |
|
h_sampling_factor_n= get_bits(gb, 5); |
|
h_sampling_factor_m= get_bits(gb, 5); |
|
v_sampling_factor_n= get_bits(gb, 5); |
|
v_sampling_factor_m= get_bits(gb, 5); |
|
s->enhancement_type= get_bits1(gb); |
|
|
|
if( h_sampling_factor_n==0 || h_sampling_factor_m==0 |
|
|| v_sampling_factor_n==0 || v_sampling_factor_m==0){ |
|
/* illegal scalability header (VERY broken encoder), |
|
* trying to workaround */ |
|
s->scalability=0; |
|
*gb= bak; |
|
}else |
|
av_log(s->avctx, AV_LOG_ERROR, "scalability not supported\n"); |
|
|
|
// bin shape stuff FIXME |
|
} |
|
} |
|
return 0; |
|
} |
|
|
|
/** |
|
* Decode the user data stuff in the header. |
|
* Also initializes divx/xvid/lavc_version/build. |
|
*/ |
|
static int decode_user_data(MpegEncContext *s, GetBitContext *gb){ |
|
char buf[256]; |
|
int i; |
|
int e; |
|
int ver = 0, build = 0, ver2 = 0, ver3 = 0; |
|
char last; |
|
|
|
for(i=0; i<255 && get_bits_count(gb) < gb->size_in_bits; i++){ |
|
if(show_bits(gb, 23) == 0) break; |
|
buf[i]= get_bits(gb, 8); |
|
} |
|
buf[i]=0; |
|
|
|
/* divx detection */ |
|
e=sscanf(buf, "DivX%dBuild%d%c", &ver, &build, &last); |
|
if(e<2) |
|
e=sscanf(buf, "DivX%db%d%c", &ver, &build, &last); |
|
if(e>=2){ |
|
s->divx_version= ver; |
|
s->divx_build= build; |
|
s->divx_packed= e==3 && last=='p'; |
|
if(s->divx_packed && !s->showed_packed_warning) { |
|
av_log(s->avctx, AV_LOG_WARNING, "Invalid and inefficient vfw-avi packed B frames detected\n"); |
|
s->showed_packed_warning=1; |
|
} |
|
} |
|
|
|
/* libavcodec detection */ |
|
e=sscanf(buf, "FFmpe%*[^b]b%d", &build)+3; |
|
if(e!=4) |
|
e=sscanf(buf, "FFmpeg v%d.%d.%d / libavcodec build: %d", &ver, &ver2, &ver3, &build); |
|
if(e!=4){ |
|
e=sscanf(buf, "Lavc%d.%d.%d", &ver, &ver2, &ver3)+1; |
|
if (e>1) |
|
build= (ver<<16) + (ver2<<8) + ver3; |
|
} |
|
if(e!=4){ |
|
if(strcmp(buf, "ffmpeg")==0){ |
|
s->lavc_build= 4600; |
|
} |
|
} |
|
if(e==4){ |
|
s->lavc_build= build; |
|
} |
|
|
|
/* Xvid detection */ |
|
e=sscanf(buf, "XviD%d", &build); |
|
if(e==1){ |
|
s->xvid_build= build; |
|
} |
|
|
|
return 0; |
|
} |
|
|
|
static int decode_vop_header(MpegEncContext *s, GetBitContext *gb){ |
|
int time_incr, time_increment; |
|
|
|
s->pict_type = get_bits(gb, 2) + AV_PICTURE_TYPE_I; /* pict type: I = 0 , P = 1 */ |
|
if(s->pict_type==AV_PICTURE_TYPE_B && s->low_delay && s->vol_control_parameters==0 && !(s->flags & CODEC_FLAG_LOW_DELAY)){ |
|
av_log(s->avctx, AV_LOG_ERROR, "low_delay flag incorrectly, clearing it\n"); |
|
s->low_delay=0; |
|
} |
|
|
|
s->partitioned_frame= s->data_partitioning && s->pict_type!=AV_PICTURE_TYPE_B; |
|
if(s->partitioned_frame) |
|
s->decode_mb= mpeg4_decode_partitioned_mb; |
|
else |
|
s->decode_mb= mpeg4_decode_mb; |
|
|
|
time_incr=0; |
|
while (get_bits1(gb) != 0) |
|
time_incr++; |
|
|
|
check_marker(gb, "before time_increment"); |
|
|
|
if(s->time_increment_bits==0 || !(show_bits(gb, s->time_increment_bits+1)&1)){ |
|
av_log(s->avctx, AV_LOG_ERROR, "hmm, seems the headers are not complete, trying to guess time_increment_bits\n"); |
|
|
|
for(s->time_increment_bits=1 ;s->time_increment_bits<16; s->time_increment_bits++){ |
|
if ( s->pict_type == AV_PICTURE_TYPE_P |
|
|| (s->pict_type == AV_PICTURE_TYPE_S && s->vol_sprite_usage==GMC_SPRITE)) { |
|
if((show_bits(gb, s->time_increment_bits+6)&0x37) == 0x30) break; |
|
}else |
|
if((show_bits(gb, s->time_increment_bits+5)&0x1F) == 0x18) break; |
|
} |
|
|
|
av_log(s->avctx, AV_LOG_ERROR, "my guess is %d bits ;)\n",s->time_increment_bits); |
|
} |
|
|
|
if(IS_3IV1) time_increment= get_bits1(gb); //FIXME investigate further |
|
else time_increment= get_bits(gb, s->time_increment_bits); |
|
|
|
if(s->pict_type!=AV_PICTURE_TYPE_B){ |
|
s->last_time_base= s->time_base; |
|
s->time_base+= time_incr; |
|
s->time= s->time_base*s->avctx->time_base.den + time_increment; |
|
if(s->workaround_bugs&FF_BUG_UMP4){ |
|
if(s->time < s->last_non_b_time){ |
|
/* header is not mpeg-4-compatible, broken encoder, |
|
* trying to workaround */ |
|
s->time_base++; |
|
s->time+= s->avctx->time_base.den; |
|
} |
|
} |
|
s->pp_time= s->time - s->last_non_b_time; |
|
s->last_non_b_time= s->time; |
|
}else{ |
|
s->time= (s->last_time_base + time_incr)*s->avctx->time_base.den + time_increment; |
|
s->pb_time= s->pp_time - (s->last_non_b_time - s->time); |
|
if(s->pp_time <=s->pb_time || s->pp_time <= s->pp_time - s->pb_time || s->pp_time<=0){ |
|
/* messed up order, maybe after seeking? skipping current b-frame */ |
|
return FRAME_SKIPPED; |
|
} |
|
ff_mpeg4_init_direct_mv(s); |
|
|
|
if(s->t_frame==0) s->t_frame= s->pb_time; |
|
if(s->t_frame==0) s->t_frame=1; // 1/0 protection |
|
s->pp_field_time= ( ROUNDED_DIV(s->last_non_b_time, s->t_frame) |
|
- ROUNDED_DIV(s->last_non_b_time - s->pp_time, s->t_frame))*2; |
|
s->pb_field_time= ( ROUNDED_DIV(s->time, s->t_frame) |
|
- ROUNDED_DIV(s->last_non_b_time - s->pp_time, s->t_frame))*2; |
|
if(!s->progressive_sequence){ |
|
if(s->pp_field_time <= s->pb_field_time || s->pb_field_time <= 1) |
|
return FRAME_SKIPPED; |
|
} |
|
} |
|
|
|
if(s->avctx->time_base.num) |
|
s->current_picture_ptr->f.pts = (s->time + s->avctx->time_base.num / 2) / s->avctx->time_base.num; |
|
else |
|
s->current_picture_ptr->f.pts = AV_NOPTS_VALUE; |
|
if(s->avctx->debug&FF_DEBUG_PTS) |
|
av_log(s->avctx, AV_LOG_DEBUG, "MPEG4 PTS: %"PRId64"\n", |
|
s->current_picture_ptr->f.pts); |
|
|
|
check_marker(gb, "before vop_coded"); |
|
|
|
/* vop coded */ |
|
if (get_bits1(gb) != 1){ |
|
if(s->avctx->debug&FF_DEBUG_PICT_INFO) |
|
av_log(s->avctx, AV_LOG_ERROR, "vop not coded\n"); |
|
return FRAME_SKIPPED; |
|
} |
|
if (s->shape != BIN_ONLY_SHAPE && ( s->pict_type == AV_PICTURE_TYPE_P |
|
|| (s->pict_type == AV_PICTURE_TYPE_S && s->vol_sprite_usage==GMC_SPRITE))) { |
|
/* rounding type for motion estimation */ |
|
s->no_rounding = get_bits1(gb); |
|
} else { |
|
s->no_rounding = 0; |
|
} |
|
//FIXME reduced res stuff |
|
|
|
if (s->shape != RECT_SHAPE) { |
|
if (s->vol_sprite_usage != 1 || s->pict_type != AV_PICTURE_TYPE_I) { |
|
skip_bits(gb, 13); /* width */ |
|
skip_bits1(gb); /* marker */ |
|
skip_bits(gb, 13); /* height */ |
|
skip_bits1(gb); /* marker */ |
|
skip_bits(gb, 13); /* hor_spat_ref */ |
|
skip_bits1(gb); /* marker */ |
|
skip_bits(gb, 13); /* ver_spat_ref */ |
|
} |
|
skip_bits1(gb); /* change_CR_disable */ |
|
|
|
if (get_bits1(gb) != 0) { |
|
skip_bits(gb, 8); /* constant_alpha_value */ |
|
} |
|
} |
|
//FIXME complexity estimation stuff |
|
|
|
if (s->shape != BIN_ONLY_SHAPE) { |
|
skip_bits_long(gb, s->cplx_estimation_trash_i); |
|
if(s->pict_type != AV_PICTURE_TYPE_I) |
|
skip_bits_long(gb, s->cplx_estimation_trash_p); |
|
if(s->pict_type == AV_PICTURE_TYPE_B) |
|
skip_bits_long(gb, s->cplx_estimation_trash_b); |
|
|
|
s->intra_dc_threshold= mpeg4_dc_threshold[ get_bits(gb, 3) ]; |
|
if(!s->progressive_sequence){ |
|
s->top_field_first= get_bits1(gb); |
|
s->alternate_scan= get_bits1(gb); |
|
}else |
|
s->alternate_scan= 0; |
|
} |
|
|
|
if(s->alternate_scan){ |
|
ff_init_scantable(s->dsp.idct_permutation, &s->inter_scantable , ff_alternate_vertical_scan); |
|
ff_init_scantable(s->dsp.idct_permutation, &s->intra_scantable , ff_alternate_vertical_scan); |
|
ff_init_scantable(s->dsp.idct_permutation, &s->intra_h_scantable, ff_alternate_vertical_scan); |
|
ff_init_scantable(s->dsp.idct_permutation, &s->intra_v_scantable, ff_alternate_vertical_scan); |
|
} else{ |
|
ff_init_scantable(s->dsp.idct_permutation, &s->inter_scantable , ff_zigzag_direct); |
|
ff_init_scantable(s->dsp.idct_permutation, &s->intra_scantable , ff_zigzag_direct); |
|
ff_init_scantable(s->dsp.idct_permutation, &s->intra_h_scantable, ff_alternate_horizontal_scan); |
|
ff_init_scantable(s->dsp.idct_permutation, &s->intra_v_scantable, ff_alternate_vertical_scan); |
|
} |
|
|
|
if(s->pict_type == AV_PICTURE_TYPE_S && (s->vol_sprite_usage==STATIC_SPRITE || s->vol_sprite_usage==GMC_SPRITE)){ |
|
if(mpeg4_decode_sprite_trajectory(s, gb) < 0) |
|
return -1; |
|
if(s->sprite_brightness_change) av_log(s->avctx, AV_LOG_ERROR, "sprite_brightness_change not supported\n"); |
|
if(s->vol_sprite_usage==STATIC_SPRITE) av_log(s->avctx, AV_LOG_ERROR, "static sprite not supported\n"); |
|
} |
|
|
|
if (s->shape != BIN_ONLY_SHAPE) { |
|
s->chroma_qscale= s->qscale = get_bits(gb, s->quant_precision); |
|
if(s->qscale==0){ |
|
av_log(s->avctx, AV_LOG_ERROR, "Error, header damaged or not MPEG4 header (qscale=0)\n"); |
|
return -1; // makes no sense to continue, as there is nothing left from the image then |
|
} |
|
|
|
if (s->pict_type != AV_PICTURE_TYPE_I) { |
|
s->f_code = get_bits(gb, 3); /* fcode_for */ |
|
if(s->f_code==0){ |
|
av_log(s->avctx, AV_LOG_ERROR, "Error, header damaged or not MPEG4 header (f_code=0)\n"); |
|
return -1; // makes no sense to continue, as the MV decoding will break very quickly |
|
} |
|
}else |
|
s->f_code=1; |
|
|
|
if (s->pict_type == AV_PICTURE_TYPE_B) { |
|
s->b_code = get_bits(gb, 3); |
|
}else |
|
s->b_code=1; |
|
|
|
if(s->avctx->debug&FF_DEBUG_PICT_INFO){ |
|
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\n", |
|
s->qscale, s->f_code, s->b_code, |
|
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")), |
|
gb->size_in_bits,s->progressive_sequence, s->alternate_scan, s->top_field_first, |
|
s->quarter_sample ? "q" : "h", s->data_partitioning, s->resync_marker, s->num_sprite_warping_points, |
|
s->sprite_warping_accuracy, 1-s->no_rounding, s->vo_type, s->vol_control_parameters ? " VOLC" : " ", s->intra_dc_threshold, s->cplx_estimation_trash_i, s->cplx_estimation_trash_p, s->cplx_estimation_trash_b); |
|
} |
|
|
|
if(!s->scalability){ |
|
if (s->shape!=RECT_SHAPE && s->pict_type!=AV_PICTURE_TYPE_I) { |
|
skip_bits1(gb); // vop shape coding type |
|
} |
|
}else{ |
|
if(s->enhancement_type){ |
|
int load_backward_shape= get_bits1(gb); |
|
if(load_backward_shape){ |
|
av_log(s->avctx, AV_LOG_ERROR, "load backward shape isn't supported\n"); |
|
} |
|
} |
|
skip_bits(gb, 2); //ref_select_code |
|
} |
|
} |
|
/* detect buggy encoders which don't set the low_delay flag (divx4/xvid/opendivx)*/ |
|
// note we cannot detect divx5 without b-frames easily (although it's buggy too) |
|
if(s->vo_type==0 && s->vol_control_parameters==0 && s->divx_version==-1 && s->picture_number==0){ |
|
av_log(s->avctx, AV_LOG_WARNING, "looks like this file was encoded with (divx4/(old)xvid/opendivx) -> forcing low_delay flag\n"); |
|
s->low_delay=1; |
|
} |
|
|
|
s->picture_number++; // better than pic number==0 always ;) |
|
|
|
s->y_dc_scale_table= ff_mpeg4_y_dc_scale_table; //FIXME add short header support |
|
s->c_dc_scale_table= ff_mpeg4_c_dc_scale_table; |
|
|
|
if(s->workaround_bugs&FF_BUG_EDGE){ |
|
s->h_edge_pos= s->width; |
|
s->v_edge_pos= s->height; |
|
} |
|
return 0; |
|
} |
|
|
|
/** |
|
* Decode mpeg4 headers. |
|
* @return <0 if no VOP found (or a damaged one) |
|
* FRAME_SKIPPED if a not coded VOP is found |
|
* 0 if a VOP is found |
|
*/ |
|
int ff_mpeg4_decode_picture_header(MpegEncContext * s, GetBitContext *gb) |
|
{ |
|
unsigned startcode, v; |
|
|
|
/* search next start code */ |
|
align_get_bits(gb); |
|
|
|
if(s->codec_tag == AV_RL32("WV1F") && show_bits(gb, 24) == 0x575630){ |
|
skip_bits(gb, 24); |
|
if(get_bits(gb, 8) == 0xF0) |
|
goto end; |
|
} |
|
|
|
startcode = 0xff; |
|
for(;;) { |
|
if(get_bits_count(gb) >= gb->size_in_bits){ |
|
if(gb->size_in_bits==8 && (s->divx_version>=0 || s->xvid_build>=0) || s->codec_tag == AV_RL32("QMP4")){ |
|
av_log(s->avctx, AV_LOG_VERBOSE, "frame skip %d\n", gb->size_in_bits); |
|
return FRAME_SKIPPED; //divx bug |
|
}else |
|
return -1; //end of stream |
|
} |
|
|
|
/* use the bits after the test */ |
|
v = get_bits(gb, 8); |
|
startcode = ((startcode << 8) | v) & 0xffffffff; |
|
|
|
if((startcode&0xFFFFFF00) != 0x100) |
|
continue; //no startcode |
|
|
|
if(s->avctx->debug&FF_DEBUG_STARTCODE){ |
|
av_log(s->avctx, AV_LOG_DEBUG, "startcode: %3X ", startcode); |
|
if (startcode<=0x11F) av_log(s->avctx, AV_LOG_DEBUG, "Video Object Start"); |
|
else if(startcode<=0x12F) av_log(s->avctx, AV_LOG_DEBUG, "Video Object Layer Start"); |
|
else if(startcode<=0x13F) av_log(s->avctx, AV_LOG_DEBUG, "Reserved"); |
|
else if(startcode<=0x15F) av_log(s->avctx, AV_LOG_DEBUG, "FGS bp start"); |
|
else if(startcode<=0x1AF) av_log(s->avctx, AV_LOG_DEBUG, "Reserved"); |
|
else if(startcode==0x1B0) av_log(s->avctx, AV_LOG_DEBUG, "Visual Object Seq Start"); |
|
else if(startcode==0x1B1) av_log(s->avctx, AV_LOG_DEBUG, "Visual Object Seq End"); |
|
else if(startcode==0x1B2) av_log(s->avctx, AV_LOG_DEBUG, "User Data"); |
|
else if(startcode==0x1B3) av_log(s->avctx, AV_LOG_DEBUG, "Group of VOP start"); |
|
else if(startcode==0x1B4) av_log(s->avctx, AV_LOG_DEBUG, "Video Session Error"); |
|
else if(startcode==0x1B5) av_log(s->avctx, AV_LOG_DEBUG, "Visual Object Start"); |
|
else if(startcode==0x1B6) av_log(s->avctx, AV_LOG_DEBUG, "Video Object Plane start"); |
|
else if(startcode==0x1B7) av_log(s->avctx, AV_LOG_DEBUG, "slice start"); |
|
else if(startcode==0x1B8) av_log(s->avctx, AV_LOG_DEBUG, "extension start"); |
|
else if(startcode==0x1B9) av_log(s->avctx, AV_LOG_DEBUG, "fgs start"); |
|
else if(startcode==0x1BA) av_log(s->avctx, AV_LOG_DEBUG, "FBA Object start"); |
|
else if(startcode==0x1BB) av_log(s->avctx, AV_LOG_DEBUG, "FBA Object Plane start"); |
|
else if(startcode==0x1BC) av_log(s->avctx, AV_LOG_DEBUG, "Mesh Object start"); |
|
else if(startcode==0x1BD) av_log(s->avctx, AV_LOG_DEBUG, "Mesh Object Plane start"); |
|
else if(startcode==0x1BE) av_log(s->avctx, AV_LOG_DEBUG, "Still Texture Object start"); |
|
else if(startcode==0x1BF) av_log(s->avctx, AV_LOG_DEBUG, "Texture Spatial Layer start"); |
|
else if(startcode==0x1C0) av_log(s->avctx, AV_LOG_DEBUG, "Texture SNR Layer start"); |
|
else if(startcode==0x1C1) av_log(s->avctx, AV_LOG_DEBUG, "Texture Tile start"); |
|
else if(startcode==0x1C2) av_log(s->avctx, AV_LOG_DEBUG, "Texture Shape Layer start"); |
|
else if(startcode==0x1C3) av_log(s->avctx, AV_LOG_DEBUG, "stuffing start"); |
|
else if(startcode<=0x1C5) av_log(s->avctx, AV_LOG_DEBUG, "reserved"); |
|
else if(startcode<=0x1FF) av_log(s->avctx, AV_LOG_DEBUG, "System start"); |
|
av_log(s->avctx, AV_LOG_DEBUG, " at %d\n", get_bits_count(gb)); |
|
} |
|
|
|
if(startcode >= 0x120 && startcode <= 0x12F){ |
|
if(decode_vol_header(s, gb) < 0) |
|
return -1; |
|
} |
|
else if(startcode == USER_DATA_STARTCODE){ |
|
decode_user_data(s, gb); |
|
} |
|
else if(startcode == GOP_STARTCODE){ |
|
mpeg4_decode_gop_header(s, gb); |
|
} |
|
else if(startcode == VOS_STARTCODE){ |
|
mpeg4_decode_profile_level(s, gb); |
|
} |
|
else if(startcode == VOP_STARTCODE){ |
|
break; |
|
} |
|
|
|
align_get_bits(gb); |
|
startcode = 0xff; |
|
} |
|
end: |
|
if(s->flags& CODEC_FLAG_LOW_DELAY) |
|
s->low_delay=1; |
|
s->avctx->has_b_frames= !s->low_delay; |
|
return decode_vop_header(s, gb); |
|
} |
|
|
|
static av_cold int decode_init(AVCodecContext *avctx) |
|
{ |
|
MpegEncContext *s = avctx->priv_data; |
|
int ret; |
|
static int done = 0; |
|
|
|
s->divx_version= |
|
s->divx_build= |
|
s->xvid_build= |
|
s->lavc_build= -1; |
|
|
|
if((ret=ff_h263_decode_init(avctx)) < 0) |
|
return ret; |
|
|
|
if (!done) { |
|
done = 1; |
|
|
|
init_rl(&ff_mpeg4_rl_intra, ff_mpeg4_static_rl_table_store[0]); |
|
init_rl(&rvlc_rl_inter, ff_mpeg4_static_rl_table_store[1]); |
|
init_rl(&rvlc_rl_intra, ff_mpeg4_static_rl_table_store[2]); |
|
INIT_VLC_RL(ff_mpeg4_rl_intra, 554); |
|
INIT_VLC_RL(rvlc_rl_inter, 1072); |
|
INIT_VLC_RL(rvlc_rl_intra, 1072); |
|
INIT_VLC_STATIC(&dc_lum, DC_VLC_BITS, 10 /* 13 */, |
|
&ff_mpeg4_DCtab_lum[0][1], 2, 1, |
|
&ff_mpeg4_DCtab_lum[0][0], 2, 1, 512); |
|
INIT_VLC_STATIC(&dc_chrom, DC_VLC_BITS, 10 /* 13 */, |
|
&ff_mpeg4_DCtab_chrom[0][1], 2, 1, |
|
&ff_mpeg4_DCtab_chrom[0][0], 2, 1, 512); |
|
INIT_VLC_STATIC(&sprite_trajectory, SPRITE_TRAJ_VLC_BITS, 15, |
|
&sprite_trajectory_tab[0][1], 4, 2, |
|
&sprite_trajectory_tab[0][0], 4, 2, 128); |
|
INIT_VLC_STATIC(&mb_type_b_vlc, MB_TYPE_B_VLC_BITS, 4, |
|
&mb_type_b_tab[0][1], 2, 1, |
|
&mb_type_b_tab[0][0], 2, 1, 16); |
|
} |
|
|
|
s->h263_pred = 1; |
|
s->low_delay = 0; //default, might be overriden in the vol header during header parsing |
|
s->decode_mb= mpeg4_decode_mb; |
|
s->time_increment_bits = 4; /* default value for broken headers */ |
|
avctx->chroma_sample_location = AVCHROMA_LOC_LEFT; |
|
|
|
return 0; |
|
} |
|
|
|
static const AVProfile mpeg4_video_profiles[] = { |
|
{ FF_PROFILE_MPEG4_SIMPLE, "Simple Profile" }, |
|
{ FF_PROFILE_MPEG4_SIMPLE_SCALABLE, "Simple Scalable Profile" }, |
|
{ FF_PROFILE_MPEG4_CORE, "Core Profile" }, |
|
{ FF_PROFILE_MPEG4_MAIN, "Main Profile" }, |
|
{ FF_PROFILE_MPEG4_N_BIT, "N-bit Profile" }, |
|
{ FF_PROFILE_MPEG4_SCALABLE_TEXTURE, "Scalable Texture Profile" }, |
|
{ FF_PROFILE_MPEG4_SIMPLE_FACE_ANIMATION, "Simple Face Animation Profile" }, |
|
{ FF_PROFILE_MPEG4_BASIC_ANIMATED_TEXTURE, "Basic Animated Texture Profile" }, |
|
{ FF_PROFILE_MPEG4_HYBRID, "Hybrid Profile" }, |
|
{ FF_PROFILE_MPEG4_ADVANCED_REAL_TIME, "Advanced Real Time Simple Profile" }, |
|
{ FF_PROFILE_MPEG4_CORE_SCALABLE, "Code Scalable Profile" }, |
|
{ FF_PROFILE_MPEG4_ADVANCED_CODING, "Advanced Coding Profile" }, |
|
{ FF_PROFILE_MPEG4_ADVANCED_CORE, "Advanced Core Profile" }, |
|
{ FF_PROFILE_MPEG4_ADVANCED_SCALABLE_TEXTURE, "Advanced Scalable Texture Profile" }, |
|
{ FF_PROFILE_MPEG4_SIMPLE_STUDIO, "Simple Studio Profile" }, |
|
{ FF_PROFILE_MPEG4_ADVANCED_SIMPLE, "Advanced Simple Profile" }, |
|
}; |
|
|
|
static const AVOption mpeg4_options[] = { |
|
{"quarter_sample", "1/4 subpel MC", offsetof(MpegEncContext, quarter_sample), FF_OPT_TYPE_INT, {.dbl = 0}, 0, 1, 0}, |
|
{"divx_packed", "divx style packed b frames", offsetof(MpegEncContext, divx_packed), FF_OPT_TYPE_INT, {.dbl = 0}, 0, 1, 0}, |
|
{NULL} |
|
}; |
|
|
|
static const AVClass mpeg4_class = { |
|
"MPEG4 Video Decoder", |
|
av_default_item_name, |
|
mpeg4_options, |
|
LIBAVUTIL_VERSION_INT, |
|
}; |
|
|
|
static const AVClass mpeg4_vdpau_class = { |
|
"MPEG4 Video VDPAU Decoder", |
|
av_default_item_name, |
|
mpeg4_options, |
|
LIBAVUTIL_VERSION_INT, |
|
}; |
|
|
|
AVCodec ff_mpeg4_decoder = { |
|
.name = "mpeg4", |
|
.type = AVMEDIA_TYPE_VIDEO, |
|
.id = CODEC_ID_MPEG4, |
|
.priv_data_size = sizeof(MpegEncContext), |
|
.init = decode_init, |
|
.close = ff_h263_decode_end, |
|
.decode = ff_h263_decode_frame, |
|
.capabilities = CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1 | CODEC_CAP_TRUNCATED | CODEC_CAP_DELAY | CODEC_CAP_FRAME_THREADS, |
|
.flush= ff_mpeg_flush, |
|
.max_lowres= 3, |
|
.long_name= NULL_IF_CONFIG_SMALL("MPEG-4 part 2"), |
|
.pix_fmts= ff_hwaccel_pixfmt_list_420, |
|
.profiles = NULL_IF_CONFIG_SMALL(mpeg4_video_profiles), |
|
.update_thread_context= ONLY_IF_THREADS_ENABLED(ff_mpeg_update_thread_context), |
|
.priv_class = &mpeg4_class, |
|
}; |
|
|
|
|
|
#if CONFIG_MPEG4_VDPAU_DECODER |
|
AVCodec ff_mpeg4_vdpau_decoder = { |
|
.name = "mpeg4_vdpau", |
|
.type = AVMEDIA_TYPE_VIDEO, |
|
.id = CODEC_ID_MPEG4, |
|
.priv_data_size = sizeof(MpegEncContext), |
|
.init = decode_init, |
|
.close = ff_h263_decode_end, |
|
.decode = ff_h263_decode_frame, |
|
.capabilities = CODEC_CAP_DR1 | CODEC_CAP_TRUNCATED | CODEC_CAP_DELAY | CODEC_CAP_HWACCEL_VDPAU, |
|
.long_name= NULL_IF_CONFIG_SMALL("MPEG-4 part 2 (VDPAU)"), |
|
.pix_fmts= (const enum PixelFormat[]){PIX_FMT_VDPAU_MPEG4, PIX_FMT_NONE}, |
|
.priv_class = &mpeg4_vdpau_class, |
|
}; |
|
#endif
|
|
|