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move scantable init from block-decode to header parser 

Originally committed as revision 990 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Michael Niedermayer 2002-10-01 23:47:04 +00:00
parent 3729c91296
commit acf44abb8c
1 changed files with 15 additions and 11 deletions
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26
libavcodec/mpeg12.c
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@ -1183,15 +1183,11 @@ static inline int mpeg2_decode_block_non_intra(MpegEncContext *s,
{
int level, i, j, run;
RLTable *rl = &rl_mpeg1;
UINT8 * scantable;
UINT8 * const scantable= s->intra_scantable.permutated;
const UINT16 *quant_matrix;
const int qscale= s->qscale;
int mismatch;
if (s->alternate_scan)
scantable = s->intra_v_scantable.permutated;
else
scantable = s->intra_scantable.permutated;
mismatch = 1;
{
@ -1267,16 +1263,11 @@ static inline int mpeg2_decode_block_intra(MpegEncContext *s,
int level, dc, diff, i, j, run;
int component;
RLTable *rl;
UINT8 * scantable;
UINT8 * const scantable= s->intra_scantable.permutated;
const UINT16 *quant_matrix;
const int qscale= s->qscale;
int mismatch;
if (s->alternate_scan)
scantable = s->intra_v_scantable.permutated;
else
scantable = s->intra_scantable.permutated;
/* DC coef */
if (n < 4){
quant_matrix = s->intra_matrix;
@ -1524,6 +1515,19 @@ static void mpeg_decode_picture_coding_extension(MpegEncContext *s)
s->repeat_first_field = get_bits1(&s->gb);
s->chroma_420_type = get_bits1(&s->gb);
s->progressive_frame = get_bits1(&s->gb);
if(s->alternate_scan){
ff_init_scantable(s, &s->inter_scantable , ff_alternate_vertical_scan);
ff_init_scantable(s, &s->intra_scantable , ff_alternate_vertical_scan);
ff_init_scantable(s, &s->intra_h_scantable, ff_alternate_vertical_scan);
ff_init_scantable(s, &s->intra_v_scantable, ff_alternate_vertical_scan);
}else{
ff_init_scantable(s, &s->inter_scantable , ff_zigzag_direct);
ff_init_scantable(s, &s->intra_scantable , ff_zigzag_direct);
ff_init_scantable(s, &s->intra_h_scantable, ff_alternate_horizontal_scan);
ff_init_scantable(s, &s->intra_v_scantable, ff_alternate_vertical_scan);
}
/* composite display not parsed */
dprintf("intra_dc_precision=%d\n", s->intra_dc_precision);
dprintf("picture_structure=%d\n", s->picture_structure);