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Code Issues Releases Activity

Simplify determing whether fragments are coded

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No measurable speed difference

Originally committed as revision 21931 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
David Conrad 2010-02-21 00:11:01 +00:00
parent a89264761f
commit 6cb35b45e6
1 changed files with 5 additions and 26 deletions
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31
libavcodec/vp3.c
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@ -555,13 +555,9 @@ static int unpack_superblocks(Vp3DecodeContext *s, GetBitContext *gb)
return 1;
}
if (current_fragment != -1) {
if (s->superblock_coding[i] == SB_NOT_CODED) {
int coded = s->superblock_coding[i];
/* copy all the fragments from the prior frame */
s->all_fragments[current_fragment].coding_method =
MODE_COPY;
} else if (s->superblock_coding[i] == SB_PARTIALLY_CODED) {
if (s->superblock_coding[i] == SB_PARTIALLY_CODED) {
/* fragment may or may not be coded; this is the case
* that cares about the fragment coding runs */
@ -570,8 +566,10 @@ static int unpack_superblocks(Vp3DecodeContext *s, GetBitContext *gb)
current_run = get_vlc2(gb,
s->fragment_run_length_vlc.table, 5, 2);
}
coded = bit;
}
if (bit) {
if (coded) {
/* default mode; actual mode will be decoded in
* the next phase */
s->all_fragments[current_fragment].coding_method =
@ -592,25 +590,6 @@ static int unpack_superblocks(Vp3DecodeContext *s, GetBitContext *gb)
s->all_fragments[current_fragment].coding_method =
MODE_COPY;
}
} else {
/* fragments are fully coded in this superblock; actual
* coding will be determined in next step */
s->all_fragments[current_fragment].coding_method =
MODE_INTER_NO_MV;
s->all_fragments[current_fragment].next_coeff= s->coeffs + current_fragment;
s->coded_fragment_list[s->coded_fragment_list_index] =
current_fragment;
if ((current_fragment >= s->fragment_start[1]) &&
(s->last_coded_y_fragment == -1) &&
(!first_c_fragment_seen)) {
s->first_coded_c_fragment = s->coded_fragment_list_index;
s->last_coded_y_fragment = s->first_coded_c_fragment - 1;
first_c_fragment_seen = 1;
}
s->coded_fragment_list_index++;
}
}
}
}