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| author | arpi <arpi@b3059339-0415-0410-9bf9-f77b7e298cf2> | 2002-08-27 22:46:54 +0000 |
|---|---|---|
| committer | arpi <arpi@b3059339-0415-0410-9bf9-f77b7e298cf2> | 2002-08-27 22:46:54 +0000 |
| commit | fd234b141e88754e0b33913b61e296f6b73453fc (patch) | |
| tree | 89fa47b8c00aa9884dff629c83fbdb2ae74daacc /libmpcodecs | |
| parent | c0536bea56e18ec3cdb46aeee8e9eda729084960 (diff) | |
| download | mpv-fd234b141e88754e0b33913b61e296f6b73453fc.tar.bz2 mpv-fd234b141e88754e0b33913b61e296f6b73453fc.tar.xz | |
'sipr' descrambling implemented, at least for 16*6 matrix
git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@7105 b3059339-0415-0410-9bf9-f77b7e298cf2
Diffstat (limited to 'libmpcodecs')
| -rw-r--r-- | libmpcodecs/ad_real.c | 39 |
1 files changed, 35 insertions, 4 deletions
diff --git a/libmpcodecs/ad_real.c b/libmpcodecs/ad_real.c index 03b4b2aecc..ad1f8e7502 100644 --- a/libmpcodecs/ad_real.c +++ b/libmpcodecs/ad_real.c @@ -158,27 +158,58 @@ static void uninit(sh_audio_t *sh){ // again: you don't have to free() a_in_buffer here! it's done by the core. } +static unsigned char sipr_swaps[38][2]={ + {0,63},{1,22},{2,44},{3,90},{5,81},{7,31},{8,86},{9,58},{10,36},{12,68}, + {13,39},{14,73},{15,53},{16,69},{17,57},{19,88},{20,34},{21,71},{24,46}, + {25,94},{26,54},{28,75},{29,50},{32,70},{33,92},{35,74},{38,85},{40,56}, + {42,87},{43,65},{45,59},{48,79},{49,93},{51,89},{55,95},{61,76},{67,83}, + {77,80} }; + static int decode_audio(sh_audio_t *sh,unsigned char *buf,int minlen,int maxlen){ int result; int len=-1; int sps=((short*)(sh->wf+1))[0]; int w=sh->wf->nBlockAlign; // 5 int h=((short*)(sh->wf+1))[1]; - - if(sps) w/=sps; else sps=1; - -// printf("bs=%d sps=%d w=%d h=%d \n",sh->wf->nBlockAlign,sps,w,h); +// printf("bs=%d sps=%d w=%d h=%d \n",sh->wf->nBlockAlign,sps,w,h); + #if 1 if(sh->a_in_buffer_len<=0){ // fill the buffer! + if(!sps){ + // 'sipr' way + int j,n; + int bs=h*w*2/96; // nibbles per subpacket + unsigned char *p=sh->a_in_buffer; + demux_read_data(sh->ds, p, h*w); + for(n=0;n<38;n++){ + int i=bs*sipr_swaps[n][0]; + int o=bs*sipr_swaps[n][1]; + // swap nibbles of block 'i' with 'o' TODO: optimize + for(j=0;j<bs;j++){ + int x=(i&1) ? (p[(i>>1)]>>4) : (p[(i>>1)]&15); + int y=(o&1) ? (p[(o>>1)]>>4) : (p[(o>>1)]&15); + if(o&1) p[(o>>1)]=(p[(o>>1)]&0x0F)|(x<<4); + else p[(o>>1)]=(p[(o>>1)]&0xF0)|x; + if(i&1) p[(i>>1)]=(p[(i>>1)]&0x0F)|(y<<4); + else p[(i>>1)]=(p[(i>>1)]&0xF0)|y; + ++i;++o; + } + } + sh->a_in_buffer_size= + sh->a_in_buffer_len=w*h; + } else { + // 'cook' way int x,y; + w/=sps; for(y=0;y<h;y++) for(x=0;x<w;x++){ demux_read_data(sh->ds, sh->a_in_buffer+sps*(h*x+((h+1)/2)*(y&1)+(y>>1)), sps); } sh->a_in_buffer_size= sh->a_in_buffer_len=w*h*sps; + } } #else |