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mpeg1 2pass encoding 

Originally committed as revision 1019 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Michael Niedermayer 2002-10-09 17:18:24 +00:00
parent 9c89585ad4
commit 4973397975
1 changed files with 26 additions and 0 deletions
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26
libavcodec/mpeg12.c
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@ -69,6 +69,16 @@ static int mpeg_decode_motion(MpegEncContext *s, int fcode, int pred);
static UINT16 mv_penalty[MAX_FCODE+1][MAX_MV*2+1];
static UINT8 fcode_tab[MAX_MV*2+1];
static inline int get_bits_diff(MpegEncContext *s){
int bits,ret;
bits= get_bit_count(&s->pb);
ret= bits - s->last_bits;
s->last_bits=bits;
return ret;
}
static void init_2d_vlc_rl(RLTable *rl)
{
int i;
@ -299,6 +309,9 @@ void mpeg1_encode_mb(MpegEncContext *s,
(mb_x == s->mb_width - 1 && mb_y == s->mb_height - 1)))) {
s->mb_incr++;
s->qscale -= s->dquant;
s->skip_count++;
s->misc_bits++;
s->last_bits++;
} else {
/* output mb incr */
mb_incr = s->mb_incr;
@ -318,6 +331,8 @@ void mpeg1_encode_mb(MpegEncContext *s,
put_bits(&s->pb, 1, 1); /* macroblock_type : macroblock_quant = 0 */
s->qscale -= s->dquant;
}
s->misc_bits+= get_bits_diff(s);
s->i_count++;
} else {
if (s->mb_intra) {
if(s->dquant && cbp){
@ -327,6 +342,8 @@ void mpeg1_encode_mb(MpegEncContext *s,
put_bits(&s->pb, 5, 0x03);
s->qscale -= s->dquant;
}
s->misc_bits+= get_bits_diff(s);
s->i_count++;
} else {
if (cbp != 0) {
if (motion_x == 0 && motion_y == 0) {
@ -336,6 +353,7 @@ void mpeg1_encode_mb(MpegEncContext *s,
}else{
put_bits(&s->pb, 2, 1); /* macroblock_pattern only */
}
s->misc_bits+= get_bits_diff(s);
put_bits(&s->pb, mbPatTable[cbp - 1][1], mbPatTable[cbp - 1][0]);
} else {
if(s->dquant){
@ -344,8 +362,10 @@ void mpeg1_encode_mb(MpegEncContext *s,
}else{
put_bits(&s->pb, 1, 1); /* motion + cbp */
}
s->misc_bits+= get_bits_diff(s);
mpeg1_encode_motion(s, motion_x - s->last_mv[0][0][0]);
mpeg1_encode_motion(s, motion_y - s->last_mv[0][0][1]);
s->mv_bits+= get_bits_diff(s);
put_bits(&s->pb, mbPatTable[cbp - 1][1], mbPatTable[cbp - 1][0]);
}
} else {
@ -353,7 +373,9 @@ void mpeg1_encode_mb(MpegEncContext *s,
mpeg1_encode_motion(s, motion_x - s->last_mv[0][0][0]);
mpeg1_encode_motion(s, motion_y - s->last_mv[0][0][1]);
s->qscale -= s->dquant;
s->mv_bits+= get_bits_diff(s);
}
s->f_count++;
}
}
for(i=0;i<6;i++) {
@ -362,6 +384,10 @@ void mpeg1_encode_mb(MpegEncContext *s,
}
}
s->mb_incr = 1;
if(s->mb_intra)
s->i_tex_bits+= get_bits_diff(s);
else
s->p_tex_bits+= get_bits_diff(s);
}
s->last_mv[0][0][0] = motion_x;
s->last_mv[0][0][1] = motion_y;