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| author | Arpi <arpi@thot.banki.hu> | 2001-12-09 12:04:09 +0000 |
|---|---|---|
| committer | Arpi <arpi@thot.banki.hu> | 2001-12-09 12:04:09 +0000 |
| commit | d962f6fd3a95e3345a7c17df938c75f67a6c6363 (patch) | |
| tree | ece30d9dc8264546709087cc5050833909342877 /libavcodec/dsputil.h | |
| parent | e3d2500fe498289a878b956f6efb4995438c9515 (diff) | |
| download | ffmpeg-d962f6fd3a95e3345a7c17df938c75f67a6c6363.tar.gz | |
new IDCT code by Michael Niedermayer (michaelni@gmx.at) - #define SIMPLE_IDCT to enable
Originally committed as revision 234 to svn://svn.ffmpeg.org/ffmpeg/trunk
Diffstat (limited to 'libavcodec/dsputil.h')
| -rw-r--r-- | libavcodec/dsputil.h | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/libavcodec/dsputil.h b/libavcodec/dsputil.h index dd2cc945ce..12f0e3f2bb 100644 --- a/libavcodec/dsputil.h +++ b/libavcodec/dsputil.h @@ -67,10 +67,33 @@ int pix_abs16x16_x2_c(UINT8 *blk1, UINT8 *blk2, int lx, int h); int pix_abs16x16_y2_c(UINT8 *blk1, UINT8 *blk2, int lx, int h); int pix_abs16x16_xy2_c(UINT8 *blk1, UINT8 *blk2, int lx, int h); +#if defined (SIMPLE_IDCT) && defined (HAVE_MMX) +static inline int block_permute_op(int j) +{ +static const int table[64]={ + 0x00, 0x08, 0x01, 0x09, 0x04, 0x0C, 0x05, 0x0D, + 0x10, 0x18, 0x11, 0x19, 0x14, 0x1C, 0x15, 0x1D, + 0x02, 0x0A, 0x03, 0x0B, 0x06, 0x0E, 0x07, 0x0F, + 0x12, 0x1A, 0x13, 0x1B, 0x16, 0x1E, 0x17, 0x1F, + 0x20, 0x28, 0x21, 0x29, 0x24, 0x2C, 0x25, 0x2D, + 0x30, 0x38, 0x31, 0x39, 0x34, 0x3C, 0x35, 0x3D, + 0x22, 0x2A, 0x23, 0x2B, 0x26, 0x2E, 0x27, 0x2F, + 0x32, 0x3A, 0x33, 0x3B, 0x36, 0x3E, 0x37, 0x3F, +}; + + return table[j]; +} +#elif defined (SIMPLE_IDCT) +static inline int block_permute_op(int j) +{ + return j; +} +#else static inline int block_permute_op(int j) { return (j & 0x38) | ((j & 6) >> 1) | ((j & 1) << 2); } +#endif void block_permute(INT16 *block); |