MrBesen/ffmpeg
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

mpeg4: decode Level Profile for MPEG4 Part 2.

Browse Source 
Signed-off-by: Ronald S. Bultje <rsbultje@gmail.com>
This commit is contained in:
Thierry Foucu 2011-07-20 20:33:23 -07:00 committed by Ronald S. Bultje
parent 364d64275c
commit 0637e50579
1 changed files with 19 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

19
libavcodec/mpeg4videodec.c
View File

@ -1523,6 +1523,22 @@ static int mpeg4_decode_gop_header(MpegEncContext * s, GetBitContext *gb){
return 0;
}
static int mpeg4_decode_profile_level(MpegEncContext * s, GetBitContext *gb){
int profile_and_level_indication;
profile_and_level_indication = get_bits(gb, 8);
s->avctx->profile = (profile_and_level_indication & 0xf0) >> 4;
s->avctx->level = (profile_and_level_indication & 0x0f);
// 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;
@ -2177,6 +2193,9 @@ int ff_mpeg4_decode_picture_header(MpegEncContext * s, GetBitContext *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;
}