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add vlc for cbp=0 that is valid in 422,444

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Originally committed as revision 2838 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Ivan Kalvachev
2004-03-02 18:39:25 +00:00
parent 50c93f74a6
commit 461cd5bfb5
2 changed files with 6 additions and 6 deletions
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9
libavcodec/mpeg12.c
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@@ -596,7 +596,7 @@ void mpeg1_encode_mb(MpegEncContext *s,
s->mv_bits+= get_bits_diff(s);
}
if(cbp)
put_bits(&s->pb, mbPatTable[cbp - 1][1], mbPatTable[cbp - 1][0]);
put_bits(&s->pb, mbPatTable[cbp][1], mbPatTable[cbp][0]);
s->f_count++;
} else{
static const int mb_type_len[4]={0,3,4,2}; //bak,for,bi
@@ -675,7 +675,7 @@ void mpeg1_encode_mb(MpegEncContext *s,
}
s->mv_bits += get_bits_diff(s);
if(cbp)
put_bits(&s->pb, mbPatTable[cbp - 1][1], mbPatTable[cbp - 1][0]);
put_bits(&s->pb, mbPatTable[cbp][1], mbPatTable[cbp][0]);
}
for(i=0;i<6;i++) {
if (cbp & (1 << (5 - i))) {
@@ -967,7 +967,7 @@ static void init_vlcs()
init_vlc(&mbincr_vlc, MBINCR_VLC_BITS, 36,
&mbAddrIncrTable[0][1], 2, 1,
&mbAddrIncrTable[0][0], 2, 1);
init_vlc(&mb_pat_vlc, MB_PAT_VLC_BITS, 63,
init_vlc(&mb_pat_vlc, MB_PAT_VLC_BITS, 64,
&mbPatTable[0][1], 2, 1,
&mbPatTable[0][0], 2, 1);
@@ -1306,11 +1306,10 @@ static int mpeg_decode_mb(MpegEncContext *s,
if (HAS_CBP(mb_type)) {
cbp = get_vlc2(&s->gb, mb_pat_vlc.table, MB_PAT_VLC_BITS, 1);
if (cbp < 0){
if (cbp < 0 || (cbp == 0) && (s->chroma_format < 2) ){
av_log(s->avctx, AV_LOG_ERROR, "invalid cbp at %d %d\n", s->mb_x, s->mb_y);
return -1;
}
cbp++;
if(s->chroma_format == 2){//CHROMA422
cbp|= ( get_bits(&s->gb,2) ) << 6;
}else

3
libavcodec/mpeg12data.h
View File

@@ -217,7 +217,8 @@ static const uint8_t mbAddrIncrTable[36][2] = {
{0x0, 8}, /* end (and 15 more 0 bits should follow) */
};
static const uint8_t mbPatTable[63][2] = {
static const uint8_t mbPatTable[64][2] = {
{0x1, 9},
{0xb, 5},
{0x9, 5},
{0xd, 6},