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| author | Alexander Strange <astrange@ithinksw.com> | 2008-04-16 01:34:55 +0000 |
|---|---|---|
| committer | Alexander Strange <astrange@ithinksw.com> | 2008-04-16 01:34:55 +0000 |
| commit | 0e956ba2771452088ebfd69bbc75fce07c56f33c (patch) | |
| tree | 2ecdf086901d249dfec4c4e977aca3fa4ca619bc /libavcodec/dsputil.c | |
| parent | b4999290fd962a484df9a51ff786a2454c6400b3 (diff) | |
| download | ffmpeg-0e956ba2771452088ebfd69bbc75fce07c56f33c.tar.gz | |
Add a new IDCT permutation, used in xvid_sse2 and possibly future similar IDCTs.
Originally committed as revision 12842 to svn://svn.ffmpeg.org/ffmpeg/trunk
Diffstat (limited to 'libavcodec/dsputil.c')
| -rw-r--r-- | libavcodec/dsputil.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/libavcodec/dsputil.c b/libavcodec/dsputil.c index ee02062479..6c734e570e 100644 --- a/libavcodec/dsputil.c +++ b/libavcodec/dsputil.c @@ -151,6 +151,8 @@ static const uint8_t simple_mmx_permutation[64]={ 0x32, 0x3A, 0x36, 0x3B, 0x33, 0x3E, 0x37, 0x3F, }; +static const uint8_t idct_sse2_row_perm[8] = {0, 4, 1, 5, 2, 6, 3, 7}; + void ff_init_scantable(uint8_t *permutation, ScanTable *st, const uint8_t *src_scantable){ int i; int end; @@ -4476,6 +4478,10 @@ void dsputil_init(DSPContext* c, AVCodecContext *avctx) for(i=0; i<64; i++) c->idct_permutation[i]= (i&0x24) | ((i&3)<<3) | ((i>>3)&3); break; + case FF_SSE2_IDCT_PERM: + for(i=0; i<64; i++) + c->idct_permutation[i]= (i&0x38) | idct_sse2_row_perm[i&7]; + break; default: av_log(avctx, AV_LOG_ERROR, "Internal error, IDCT permutation not set\n"); } |