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| author | Michael Niedermayer <michaelni@gmx.at> | 2002-01-10 00:51:45 +0000 |
|---|---|---|
| committer | Michael Niedermayer <michaelni@gmx.at> | 2002-01-10 00:51:45 +0000 |
| commit | 5a2408385979a543dd86752fafe5724fd8fbbaf4 (patch) | |
| tree | d3ab138d85ee6885d5fbb7435001f3c1603511c9 /libavcodec/dsputil.c | |
| parent | ef093645ef508f755ac80ef62cf774e376fe1eb8 (diff) | |
| download | ffmpeg-streaming-5a2408385979a543dd86752fafe5724fd8fbbaf4.zip ffmpeg-streaming-5a2408385979a543dd86752fafe5724fd8fbbaf4.tar.gz | |
fix for non-mmx runtimedetect encoding bugs - patch by Michael Niedermayer <michaelni@gmx.at>
Originally committed as revision 250 to svn://svn.ffmpeg.org/ffmpeg/trunk
Diffstat (limited to 'libavcodec/dsputil.c')
| -rw-r--r-- | libavcodec/dsputil.c | 34 |
1 files changed, 25 insertions, 9 deletions
diff --git a/libavcodec/dsputil.c b/libavcodec/dsputil.c index f699b2e..9811df7 100644 --- a/libavcodec/dsputil.c +++ b/libavcodec/dsputil.c @@ -71,6 +71,21 @@ UINT8 ff_alternate_vertical_scan[64] = { 38, 46, 54, 62, 39, 47, 55, 63, }; + +static UINT8 simple_mmx_permutation[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, +}; + +UINT8 permutation[64]; +//UINT8 invPermutation[64]; + void get_pixels_c(DCTELEM *block, const UINT8 *pixels, int line_size) { DCTELEM *p; @@ -390,24 +405,16 @@ int pix_abs16x16_xy2_c(UINT8 *pix1, UINT8 *pix2, int line_size, int h) /* permute block according so that it corresponds to the MMX idct order */ #ifdef SIMPLE_IDCT + /* general permutation, but perhaps slightly slower */ void block_permute(INT16 *block) { int i; INT16 temp[64]; -// for(i=0; i<64; i++) temp[i] = block[ block_permute_op(i) ]; for(i=0; i<64; i++) temp[ block_permute_op(i) ] = block[i]; for(i=0; i<64; i++) block[i] = temp[i]; -/* - for(i=0; i<64; i++) - { - if((i&7)==0) printf("\n"); - printf("%2d ", block[i]); - } -*/ } - #else void block_permute(INT16 *block) @@ -480,6 +487,15 @@ void dsputil_init(void) if(ff_idct == simple_idct) use_permuted_idct=0; #endif + if(use_permuted_idct) +#ifdef SIMPLE_IDCT + for(i=0; i<64; i++) permutation[i]= simple_mmx_permutation[i]; +#else + for(i=0; i<64; i++) permutation[i]= (i & 0x38) | ((i & 6) >> 1) | ((i & 1) << 2); +#endif + else + for(i=0; i<64; i++) permutation[i]=i; + if (use_permuted_idct) { /* permute for IDCT */ for(i=0;i<64;i++) { |
