mirror of https://git.ffmpeg.org/ffmpeg.git
mpeg4 b-frames :)
create slightly more correct headers & add "ffmpeg" user-data section Originally committed as revision 328 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Michael Niedermayer
parent
e2263827d5
commit
6f91bcd151
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@ -35,7 +35,7 @@ static void h263_encode_motion(MpegEncContext * s, int val);
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static void h263p_encode_umotion(MpegEncContext * s, int val);
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static void mpeg4_encode_block(MpegEncContext * s, DCTELEM * block,
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int n);
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static int h263_decode_motion(MpegEncContext * s, int pred);
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static int h263_decode_motion(MpegEncContext * s, int pred, int fcode);
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static int h263p_decode_umotion(MpegEncContext * s, int pred);
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static int h263_decode_block(MpegEncContext * s, DCTELEM * block,
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int n, int coded);
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@ -421,7 +421,6 @@ INT16 *h263_pred_motion(MpegEncContext * s, int block,
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return mot_val;
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}
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static void h263_encode_motion(MpegEncContext * s, int val)
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{
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int range, l, m, bit_size, sign, code, bits;
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@ -571,11 +570,32 @@ static void h263_encode_block(MpegEncContext * s, DCTELEM * block, int n)
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/***************************************************/
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static void mpeg4_stuffing(PutBitContext * pbc)
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{
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int length;
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put_bits(pbc, 1, 0);
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length= (-get_bit_count(pbc))&7;
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put_bits(pbc, length, (1<<length)-1);
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}
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static void put_string(PutBitContext * pbc, char *s)
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{
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while(*s){
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put_bits(pbc, 8, *s);
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s++;
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}
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put_bits(pbc, 8, 0);
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}
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/* write mpeg4 VOP header */
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void mpeg4_encode_picture_header(MpegEncContext * s, int picture_number)
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{
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align_put_bits(&s->pb);
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mpeg4_stuffing(&s->pb);
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put_bits(&s->pb, 16, 0);
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put_bits(&s->pb, 16, 0x1B2); /* user_data */
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put_string(&s->pb, "ffmpeg"); //FIXME append some version ...
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mpeg4_stuffing(&s->pb);
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put_bits(&s->pb, 16, 0); /* vop header */
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put_bits(&s->pb, 16, 0x1B6); /* vop header */
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put_bits(&s->pb, 2, s->pict_type - 1); /* pict type: I = 0 , P = 1 */
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@ -839,6 +859,7 @@ static VLC cbpy_vlc;
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static VLC mv_vlc;
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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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void init_rl(RLTable *rl)
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{
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@ -922,6 +943,9 @@ void h263_decode_init_vlc(MpegEncContext *s)
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init_vlc(&sprite_trajectory, 9, 15,
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&sprite_trajectory_tab[0][1], 4, 2,
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&sprite_trajectory_tab[0][0], 4, 2);
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init_vlc(&mb_type_b_vlc, 4, 4,
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&mb_type_b_tab[0][1], 2, 1,
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&mb_type_b_tab[0][0], 2, 1);
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}
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}
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@ -997,15 +1021,8 @@ int h263_decode_mb(MpegEncContext *s,
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dquant = cbpc & 8;
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s->mb_intra = ((cbpc & 4) != 0);
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} else {
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cbpc = get_vlc(&s->gb, &intra_MCBPC_vlc);
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if (cbpc < 0)
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return -1;
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dquant = cbpc & 4;
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s->mb_intra = 1;
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}
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if (!s->mb_intra) {
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if (s->mb_intra) goto intra;
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if(s->pict_type==S_TYPE && s->vol_sprite_usage==GMC_SPRITE && (cbpc & 16) == 0)
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s->mcsel= get_bits1(&s->gb);
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else s->mcsel= 0;
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@ -1026,7 +1043,7 @@ int h263_decode_mb(MpegEncContext *s,
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if (s->umvplus_dec)
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mx = h263p_decode_umotion(s, pred_x);
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else if(!s->mcsel)
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mx = h263_decode_motion(s, pred_x);
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mx = h263_decode_motion(s, pred_x, s->f_code);
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else {
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const int a= s->sprite_warping_accuracy;
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// int l = (1 << (s->f_code - 1)) * 32;
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@ -1040,7 +1057,7 @@ int h263_decode_mb(MpegEncContext *s,
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if (s->umvplus_dec)
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my = h263p_decode_umotion(s, pred_y);
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else if(!s->mcsel)
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my = h263_decode_motion(s, pred_y);
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my = h263_decode_motion(s, pred_y, s->f_code);
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else{
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const int a= s->sprite_warping_accuracy;
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// int l = (1 << (s->f_code - 1)) * 32;
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@ -1065,14 +1082,14 @@ int h263_decode_mb(MpegEncContext *s,
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if (s->umvplus_dec)
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mx = h263p_decode_umotion(s, pred_x);
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else
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mx = h263_decode_motion(s, pred_x);
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mx = h263_decode_motion(s, pred_x, s->f_code);
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if (mx >= 0xffff)
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return -1;
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if (s->umvplus_dec)
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my = h263p_decode_umotion(s, pred_y);
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else
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my = h263_decode_motion(s, pred_y);
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my = h263_decode_motion(s, pred_y, s->f_code);
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if (my >= 0xffff)
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return -1;
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s->mv[0][i][0] = mx;
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@ -1083,7 +1100,126 @@ int h263_decode_mb(MpegEncContext *s,
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mot_val[1] = my;
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}
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}
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} else {
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} else if(s->pict_type==B_TYPE) {
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int modb1; // first bit of modb
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int modb2; // second bit of modb
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int mb_type;
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int time_pp;
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int time_pb;
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int xy;
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s->mb_intra = 0; //B-frames never contain intra blocks
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s->mcsel=0; // ... true gmc blocks
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if(s->mb_x==0){
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s->last_mv[0][0][0]=
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s->last_mv[0][0][1]=
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s->last_mv[1][0][0]=
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s->last_mv[1][0][1]= 0;
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}
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/* if we skipped it in the future P Frame than skip it now too */
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s->mb_skiped= s->mbskip_table[s->mb_y * s->mb_width + s->mb_x]; // Note, skiptab=0 if last was GMC
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if(s->mb_skiped){
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/* skip mb */
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for(i=0;i<6;i++)
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s->block_last_index[i] = -1;
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s->mv_dir = MV_DIR_FORWARD;
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s->mv_type = MV_TYPE_16X16;
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s->mv[0][0][0] = 0;
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s->mv[0][0][1] = 0;
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s->mv[1][0][0] = 0;
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s->mv[1][0][1] = 0;
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s->last_mv[0][0][0]=
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s->last_mv[0][0][1]=
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s->last_mv[1][0][0]=
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s->last_mv[1][0][1]= 0;
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s->mb_skiped = 1;
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return 0;
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}
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modb1= get_bits1(&s->gb);
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if(modb1==0){
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modb2= get_bits1(&s->gb);
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mb_type= get_vlc(&s->gb, &mb_type_b_vlc);
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if(modb2==0) cbp= get_bits(&s->gb, 6);
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else cbp=0;
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if (mb_type && cbp) {
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if(get_bits1(&s->gb)){
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s->qscale +=get_bits1(&s->gb)*4 - 2;
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if (s->qscale < 1)
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s->qscale = 1;
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else if (s->qscale > 31)
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s->qscale = 31;
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}
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}
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}else{
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mb_type=4; //like 0 but no vectors coded
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cbp=0;
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}
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s->mv_type = MV_TYPE_16X16; // we'll switch to 8x8 only if the last P frame had 8x8 for this MB and mb_type=0 here
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mx=my=0; //for case 4, we could put this to the mb_type=4 but than gcc compains about uninitalized mx/my
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switch(mb_type)
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{
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case 0:
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mx = h263_decode_motion(s, 0, 1);
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my = h263_decode_motion(s, 0, 1);
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case 4:
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s->mv_dir = MV_DIR_FORWARD | MV_DIR_BACKWARD | MV_DIRECT;
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xy= (2*s->mb_width + 2)*(2*s->mb_y + 1) + 2*s->mb_x + 1;
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time_pp= s->last_non_b_time[0] - s->last_non_b_time[1];
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time_pb= s->time - s->last_non_b_time[1];
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//if(time_pp>3000 )printf("%d %d ", time_pp, time_pb);
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//FIXME 4MV
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//FIXME avoid divides
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s->mv[0][0][0] = s->motion_val[xy][0]*time_pb/time_pp + mx;
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s->mv[0][0][1] = s->motion_val[xy][1]*time_pb/time_pp + my;
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s->mv[1][0][0] = mx ? s->mv[0][0][0] - s->motion_val[xy][0]
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: s->motion_val[xy][0]*(time_pb - time_pp)/time_pp + mx;
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s->mv[1][0][1] = my ? s->mv[0][0][1] - s->motion_val[xy][1]
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: s->motion_val[xy][1]*(time_pb - time_pp)/time_pp + my;
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/* s->mv[0][0][0] =
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s->mv[0][0][1] =
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s->mv[1][0][0] =
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s->mv[1][0][1] = 1000;*/
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break;
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case 1:
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s->mv_dir = MV_DIR_FORWARD | MV_DIR_BACKWARD;
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mx = h263_decode_motion(s, s->last_mv[0][0][0], s->f_code);
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my = h263_decode_motion(s, s->last_mv[0][0][1], s->f_code);
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s->last_mv[0][0][0]= s->mv[0][0][0] = mx;
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s->last_mv[0][0][1]= s->mv[0][0][1] = my;
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mx = h263_decode_motion(s, s->last_mv[1][0][0], s->b_code);
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my = h263_decode_motion(s, s->last_mv[1][0][1], s->b_code);
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s->last_mv[1][0][0]= s->mv[1][0][0] = mx;
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s->last_mv[1][0][1]= s->mv[1][0][1] = my;
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break;
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case 2:
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s->mv_dir = MV_DIR_BACKWARD;
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mx = h263_decode_motion(s, s->last_mv[1][0][0], s->b_code);
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my = h263_decode_motion(s, s->last_mv[1][0][1], s->b_code);
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s->last_mv[1][0][0]= s->mv[1][0][0] = mx;
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s->last_mv[1][0][1]= s->mv[1][0][1] = my;
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break;
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case 3:
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s->mv_dir = MV_DIR_FORWARD;
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mx = h263_decode_motion(s, s->last_mv[0][0][0], s->f_code);
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my = h263_decode_motion(s, s->last_mv[0][0][1], s->f_code);
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s->last_mv[0][0][0]= s->mv[0][0][0] = mx;
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s->last_mv[0][0][1]= s->mv[0][0][1] = my;
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break;
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default: return -1;
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}
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} else { /* I-Frame */
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cbpc = get_vlc(&s->gb, &intra_MCBPC_vlc);
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if (cbpc < 0)
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return -1;
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dquant = cbpc & 4;
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s->mb_intra = 1;
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intra:
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s->ac_pred = 0;
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if (s->h263_pred || s->h263_aic) {
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s->ac_pred = get_bits1(&s->gb);
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@ -1120,7 +1256,7 @@ int h263_decode_mb(MpegEncContext *s,
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return 0;
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}
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static int h263_decode_motion(MpegEncContext * s, int pred)
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static int h263_decode_motion(MpegEncContext * s, int pred, int f_code)
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{
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int code, val, sign, shift, l, m;
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@ -1131,7 +1267,7 @@ static int h263_decode_motion(MpegEncContext * s, int pred)
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if (code == 0)
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return pred;
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sign = get_bits1(&s->gb);
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shift = s->f_code - 1;
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shift = f_code - 1;
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val = (code - 1) << shift;
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if (shift > 0)
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val |= get_bits(&s->gb, shift);
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@ -1142,7 +1278,7 @@ static int h263_decode_motion(MpegEncContext * s, int pred)
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/* modulo decoding */
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if (!s->h263_long_vectors) {
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l = (1 << (s->f_code - 1)) * 32;
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l = (1 << (f_code - 1)) * 32;
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m = 2 * l;
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if (val < -l) {
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val += m;
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@ -1577,21 +1713,21 @@ static void mpeg4_decode_sprite_trajectory(MpegEncContext * s)
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h2= 1<<beta;
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// Note, the 4th point isnt used for GMC
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/*
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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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//FIXME DIVX5 vs. mpeg4 ?
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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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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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@ -1715,7 +1851,6 @@ printf("%d %d\n", s->sprite_delta[1][1][1], a<<s->sprite_shift[1][1]);*/
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else
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s->real_sprite_warping_points= s->num_sprite_warping_points;
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//FIXME convert stuff if accurace != 3
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}
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/* decode mpeg4 VOP header */
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@ -1741,7 +1876,7 @@ int mpeg4_decode_picture_header(MpegEncContext * s)
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}
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//printf("startcode %X %d\n", startcode, get_bits_count(&s->gb));
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if (startcode == 0x120) { // Video Object Layer
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int time_increment_resolution, width, height, vo_ver_id;
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int width, height, vo_ver_id;
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/* vol header */
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skip_bits(&s->gb, 1); /* random access */
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@ -1770,8 +1905,8 @@ int mpeg4_decode_picture_header(MpegEncContext * s)
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skip_bits1(&s->gb); /* marker */
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time_increment_resolution = get_bits(&s->gb, 16);
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s->time_increment_bits = av_log2(time_increment_resolution - 1) + 1;
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s->time_increment_resolution = get_bits(&s->gb, 16);
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s->time_increment_bits = av_log2(s->time_increment_resolution - 1) + 1;
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if (s->time_increment_bits < 1)
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s->time_increment_bits = 1;
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skip_bits1(&s->gb); /* marker */
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@ -1899,24 +2034,27 @@ int mpeg4_decode_picture_header(MpegEncContext * s)
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}
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s->pict_type = get_bits(&s->gb, 2) + 1; /* pict type: I = 0 , P = 1 */
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if(s->pict_type == B_TYPE)
|
||||
{
|
||||
printf("B-VOP\n");
|
||||
return -1;
|
||||
}
|
||||
|
||||
/* XXX: parse time base */
|
||||
time_incr = 0;
|
||||
time_incr=0;
|
||||
while (get_bits1(&s->gb) != 0)
|
||||
time_incr++;
|
||||
|
||||
skip_bits1(&s->gb); /* marker */
|
||||
skip_bits(&s->gb, s->time_increment_bits);
|
||||
s->time_increment= get_bits(&s->gb, s->time_increment_bits);
|
||||
if(s->pict_type!=B_TYPE){
|
||||
s->time_base+= time_incr;
|
||||
s->last_non_b_time[1]= s->last_non_b_time[0];
|
||||
s->last_non_b_time[0]= s->time_base*s->time_increment_resolution + s->time_increment;
|
||||
}else{
|
||||
s->time= (s->last_non_b_time[1]/s->time_increment_resolution + time_incr)*s->time_increment_resolution;
|
||||
s->time+= s->time_increment;
|
||||
}
|
||||
skip_bits1(&s->gb); /* marker */
|
||||
/* vop coded */
|
||||
if (get_bits1(&s->gb) != 1)
|
||||
goto redo;
|
||||
|
||||
//printf("time %d %d %d || %d %d %d\n", s->time_increment_bits, s->time_increment, s->time_base,
|
||||
//s->time, s->last_non_b_time[0], s->last_non_b_time[1]);
|
||||
if (s->shape != BIN_ONLY_SHAPE && ( s->pict_type == P_TYPE
|
||||
|| (s->pict_type == S_TYPE && s->vol_sprite_usage==GMC_SPRITE))) {
|
||||
/* rounding type for motion estimation */
|
||||
|
|
@ -1967,9 +2105,11 @@ int mpeg4_decode_picture_header(MpegEncContext * s)
|
|||
|
||||
if (s->pict_type != I_TYPE) {
|
||||
s->f_code = get_bits(&s->gb, 3); /* fcode_for */
|
||||
//printf("f-code %d\n", s->f_code);
|
||||
}
|
||||
if (s->pict_type == B_TYPE) {
|
||||
s->b_code = get_bits(&s->gb, 3);
|
||||
//printf("b-code %d\n", s->b_code);
|
||||
}
|
||||
//printf("quant:%d fcode:%d\n", s->qscale, s->f_code);
|
||||
if(!s->scalability){
|
||||
|
|
|
|||
|
|
@ -45,6 +45,7 @@ static int h263_decode_init(AVCodecContext *avctx)
|
|||
case CODEC_ID_MPEG4:
|
||||
s->time_increment_bits = 4; /* default value for broken headers */
|
||||
s->h263_pred = 1;
|
||||
s->has_b_frames = 1;
|
||||
break;
|
||||
case CODEC_ID_MSMPEG4:
|
||||
s->h263_msmpeg4 = 1;
|
||||
|
|
@ -219,9 +220,15 @@ static int h263_decode_frame(AVCodecContext *avctx,
|
|||
|
||||
MPV_frame_end(s);
|
||||
|
||||
pict->data[0] = s->current_picture[0];
|
||||
pict->data[1] = s->current_picture[1];
|
||||
pict->data[2] = s->current_picture[2];
|
||||
if(s->pict_type==B_TYPE){
|
||||
pict->data[0] = s->current_picture[0];
|
||||
pict->data[1] = s->current_picture[1];
|
||||
pict->data[2] = s->current_picture[2];
|
||||
} else {
|
||||
pict->data[0] = s->last_picture[0];
|
||||
pict->data[1] = s->last_picture[1];
|
||||
pict->data[2] = s->last_picture[2];
|
||||
}
|
||||
pict->linesize[0] = s->linesize;
|
||||
pict->linesize[1] = s->linesize / 2;
|
||||
pict->linesize[2] = s->linesize / 2;
|
||||
|
|
|
|||
|
|
@ -99,3 +99,7 @@ static const UINT16 sprite_trajectory_tab[15][2] = {
|
|||
{0x0E, 4}, {0x1E, 5}, {0x3E, 6}, {0x7E, 7}, {0xFE, 8},
|
||||
{0x1FE, 9},{0x3FE, 10},{0x7FE, 11},{0xFFE, 12},
|
||||
};
|
||||
|
||||
static const UINT8 mb_type_b_tab[4][2] = {
|
||||
{1, 1}, {1, 2}, {1, 3}, {1, 4},
|
||||
};
|
||||
|
|
|
|||
|
|
@ -430,6 +430,7 @@ void MPV_frame_start(MpegEncContext *s)
|
|||
s->current_picture[i] = s->aux_picture[i];
|
||||
}
|
||||
} else {
|
||||
s->last_non_b_pict_type= s->pict_type;
|
||||
for(i=0;i<3;i++) {
|
||||
/* swap next and last */
|
||||
tmp = s->last_picture[i];
|
||||
|
|
@ -745,7 +746,7 @@ static inline void MPV_motion(MpegEncContext *s,
|
|||
ref_picture, 0,
|
||||
16);
|
||||
#endif
|
||||
}else if(s->quarter_sample){
|
||||
}else if(s->quarter_sample && dir==0){ //FIXME
|
||||
qpel_motion(s, dest_y, dest_cb, dest_cr, 0,
|
||||
ref_picture, 0,
|
||||
0, pix_op, qpix_op,
|
||||
|
|
@ -930,8 +931,9 @@ void MPV_decode_mb(MpegEncContext *s, DCTELEM block[6][64])
|
|||
else if (s->h263_pred || s->h263_aic)
|
||||
s->mbintra_table[mb_x + mb_y*s->mb_width]=1;
|
||||
|
||||
/* update motion predictor */
|
||||
/* update motion predictor, not for B-frames as they need the motion_val from the last P/S-Frame */
|
||||
if (s->out_format == FMT_H263) {
|
||||
if(s->pict_type!=B_TYPE){
|
||||
int xy, wrap, motion_x, motion_y;
|
||||
|
||||
wrap = 2 * s->mb_width + 2;
|
||||
|
|
@ -954,6 +956,7 @@ void MPV_decode_mb(MpegEncContext *s, DCTELEM block[6][64])
|
|||
s->motion_val[xy + 1 + wrap][0] = motion_x;
|
||||
s->motion_val[xy + 1 + wrap][1] = motion_y;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
if (!s->intra_only) {
|
||||
|
|
|
|||
|
|
@ -84,19 +84,21 @@ typedef struct MpegEncContext {
|
|||
|
||||
int qscale;
|
||||
int pict_type;
|
||||
int last_non_b_pict_type; /* used for mpeg4 gmc b-frames */
|
||||
int frame_rate_index;
|
||||
/* motion compensation */
|
||||
int unrestricted_mv;
|
||||
int h263_long_vectors; /* use horrible h263v1 long vector mode */
|
||||
|
||||
int f_code; /* resolution */
|
||||
int b_code; /* resolution for B Frames*/
|
||||
INT16 *mv_table[2]; /* MV table */
|
||||
INT16 (*motion_val)[2]; /* used for MV prediction */
|
||||
int b_code; /* backward resolution for B Frames (mpeg4) */
|
||||
INT16 *mv_table[2]; /* MV table (1MV per MB)*/
|
||||
INT16 (*motion_val)[2]; /* used for MV prediction (4MV per MB)*/
|
||||
int full_search;
|
||||
int mv_dir;
|
||||
#define MV_DIR_BACKWARD 1
|
||||
#define MV_DIR_FORWARD 2
|
||||
#define MV_DIRECT 4 // bidirectional mode where the difference equals the MV of the last P/S/I-Frame (mpeg4)
|
||||
int mv_type;
|
||||
#define MV_TYPE_16X16 0 /* 1 vector for the whole mb */
|
||||
#define MV_TYPE_8X8 1 /* 4 vectors (h263) */
|
||||
|
|
@ -156,7 +158,12 @@ typedef struct MpegEncContext {
|
|||
int h263_aic_dir; /* AIC direction: 0 = left, 1 = top */
|
||||
|
||||
/* mpeg4 specific */
|
||||
int time_increment_resolution;
|
||||
int time_increment_bits;
|
||||
int time_increment;
|
||||
int time_base;
|
||||
int time;
|
||||
int last_non_b_time[2];
|
||||
int shape;
|
||||
int vol_sprite_usage;
|
||||
int sprite_width;
|
||||
|
|
|
|||
Loading…
Reference in New Issue