diff options
| author | Michael Niedermayer <michaelni@gmx.at> | 2002-09-01 16:52:33 +0000 |
|---|---|---|
| committer | Michael Niedermayer <michaelni@gmx.at> | 2002-09-01 16:52:33 +0000 |
| commit | ad324c93515ca4acb43f5973ba67861213ff584d (patch) | |
| tree | a542e7b37f7a8a4283a28959258b68196b38c783 /libavcodec/dct-test.c | |
| parent | 6b791538b90b95624e4d7b30743b409f3ee64997 (diff) | |
dct cleanup
more accurate mmx dct (dont discard bits for fun)
fixing mmx quantizer bug for qscale%2==1 (bias was slightly wrong)
Originally committed as revision 895 to svn://svn.ffmpeg.org/ffmpeg/trunk
Diffstat (limited to 'libavcodec/dct-test.c')
| -rw-r--r-- | libavcodec/dct-test.c | 20 |
1 files changed, 11 insertions, 9 deletions
diff --git a/libavcodec/dct-test.c b/libavcodec/dct-test.c index e03e1e6436..a46223ed27 100644 --- a/libavcodec/dct-test.c +++ b/libavcodec/dct-test.c @@ -101,8 +101,12 @@ void dct_error(const char *name, int is_idct, case 0: for(i=0;i<64;i++) block1[i] = (random() % 512) -256; - if (is_idct) + if (is_idct){ fdct(block1); + + for(i=0;i<64;i++) + block1[i]>>=3; + } break; case 1:{ int num= (random()%10)+1; @@ -153,17 +157,11 @@ void dct_error(const char *name, int is_idct, if (fdct_func == fdct_ifast) { for(i=0; i<64; i++) { - scale = (1 << (AANSCALE_BITS + 11)) / aanscales[i]; + scale = 8*(1 << (AANSCALE_BITS + 11)) / aanscales[i]; block[i] = (block[i] * scale /*+ (1<<(AANSCALE_BITS-1))*/) >> AANSCALE_BITS; } } - if (fdct_func == ff_jpeg_fdct_islow) { - for(i=0; i<64; i++) { - block[i] = (block[i]+3)>>3; - } - } - fdct_ref(block1); blockSumErr=0; @@ -212,8 +210,12 @@ void dct_error(const char *name, int is_idct, case 0: for(i=0;i<64;i++) block1[i] = (random() % 512) -256; - if (is_idct) + if (is_idct){ fdct(block1); + + for(i=0;i<64;i++) + block1[i]>>=3; + } break; case 1:{ case 2: |