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312 lines
8.9 KiB
312 lines
8.9 KiB
/* |
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* Copyright (C) 2004 the ffmpeg project |
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* |
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* This library is free software; you can redistribute it and/or |
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* modify it under the terms of the GNU Lesser General Public |
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* License as published by the Free Software Foundation; either |
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* version 2 of the License, or (at your option) any later version. |
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* |
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* This library is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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* Lesser General Public License for more details. |
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* |
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* You should have received a copy of the GNU Lesser General Public |
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* License along with this library; if not, write to the Free Software |
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
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*/ |
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/** |
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* @file vp3dsp.c |
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* Standard C DSP-oriented functions cribbed from the original VP3 |
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* source code. |
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*/ |
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#include "common.h" |
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#include "avcodec.h" |
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#include "dsputil.h" |
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#include "vp3data.h" |
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#define IdctAdjustBeforeShift 8 |
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#define xC1S7 64277 |
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#define xC2S6 60547 |
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#define xC3S5 54491 |
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#define xC4S4 46341 |
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#define xC5S3 36410 |
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#define xC6S2 25080 |
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#define xC7S1 12785 |
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static always_inline void idct(uint8_t *dst, int stride, int16_t *input, int type) |
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{ |
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int16_t *ip = input; |
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uint8_t *cm = cropTbl + MAX_NEG_CROP; |
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int A_, B_, C_, D_, _Ad, _Bd, _Cd, _Dd, E_, F_, G_, H_; |
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int _Ed, _Gd, _Add, _Bdd, _Fd, _Hd; |
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int t1, t2; |
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int i; |
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/* Inverse DCT on the rows now */ |
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for (i = 0; i < 8; i++) { |
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/* Check for non-zero values */ |
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if ( ip[0] | ip[1] | ip[2] | ip[3] | ip[4] | ip[5] | ip[6] | ip[7] ) { |
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t1 = (int32_t)(xC1S7 * ip[1]); |
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t2 = (int32_t)(xC7S1 * ip[7]); |
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t1 >>= 16; |
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t2 >>= 16; |
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A_ = t1 + t2; |
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t1 = (int32_t)(xC7S1 * ip[1]); |
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t2 = (int32_t)(xC1S7 * ip[7]); |
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t1 >>= 16; |
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t2 >>= 16; |
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B_ = t1 - t2; |
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t1 = (int32_t)(xC3S5 * ip[3]); |
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t2 = (int32_t)(xC5S3 * ip[5]); |
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t1 >>= 16; |
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t2 >>= 16; |
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C_ = t1 + t2; |
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t1 = (int32_t)(xC3S5 * ip[5]); |
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t2 = (int32_t)(xC5S3 * ip[3]); |
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t1 >>= 16; |
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t2 >>= 16; |
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D_ = t1 - t2; |
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t1 = (int32_t)(xC4S4 * (A_ - C_)); |
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t1 >>= 16; |
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_Ad = t1; |
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t1 = (int32_t)(xC4S4 * (B_ - D_)); |
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t1 >>= 16; |
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_Bd = t1; |
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_Cd = A_ + C_; |
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_Dd = B_ + D_; |
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t1 = (int32_t)(xC4S4 * (ip[0] + ip[4])); |
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t1 >>= 16; |
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E_ = t1; |
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t1 = (int32_t)(xC4S4 * (ip[0] - ip[4])); |
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t1 >>= 16; |
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F_ = t1; |
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t1 = (int32_t)(xC2S6 * ip[2]); |
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t2 = (int32_t)(xC6S2 * ip[6]); |
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t1 >>= 16; |
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t2 >>= 16; |
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G_ = t1 + t2; |
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t1 = (int32_t)(xC6S2 * ip[2]); |
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t2 = (int32_t)(xC2S6 * ip[6]); |
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t1 >>= 16; |
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t2 >>= 16; |
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H_ = t1 - t2; |
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_Ed = E_ - G_; |
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_Gd = E_ + G_; |
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_Add = F_ + _Ad; |
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_Bdd = _Bd - H_; |
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_Fd = F_ - _Ad; |
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_Hd = _Bd + H_; |
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/* Final sequence of operations over-write original inputs. */ |
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ip[0] = _Gd + _Cd ; |
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ip[7] = _Gd - _Cd ; |
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ip[1] = _Add + _Hd; |
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ip[2] = _Add - _Hd; |
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ip[3] = _Ed + _Dd ; |
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ip[4] = _Ed - _Dd ; |
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ip[5] = _Fd + _Bdd; |
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ip[6] = _Fd - _Bdd; |
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} |
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ip += 8; /* next row */ |
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} |
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ip = input; |
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for ( i = 0; i < 8; i++) { |
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/* Check for non-zero values (bitwise or faster than ||) */ |
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if ( ip[1 * 8] | ip[2 * 8] | ip[3 * 8] | |
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ip[4 * 8] | ip[5 * 8] | ip[6 * 8] | ip[7 * 8] ) { |
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t1 = (int32_t)(xC1S7 * ip[1*8]); |
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t2 = (int32_t)(xC7S1 * ip[7*8]); |
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t1 >>= 16; |
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t2 >>= 16; |
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A_ = t1 + t2; |
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t1 = (int32_t)(xC7S1 * ip[1*8]); |
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t2 = (int32_t)(xC1S7 * ip[7*8]); |
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t1 >>= 16; |
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t2 >>= 16; |
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B_ = t1 - t2; |
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t1 = (int32_t)(xC3S5 * ip[3*8]); |
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t2 = (int32_t)(xC5S3 * ip[5*8]); |
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t1 >>= 16; |
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t2 >>= 16; |
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C_ = t1 + t2; |
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t1 = (int32_t)(xC3S5 * ip[5*8]); |
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t2 = (int32_t)(xC5S3 * ip[3*8]); |
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t1 >>= 16; |
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t2 >>= 16; |
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D_ = t1 - t2; |
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t1 = (int32_t)(xC4S4 * (A_ - C_)); |
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t1 >>= 16; |
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_Ad = t1; |
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t1 = (int32_t)(xC4S4 * (B_ - D_)); |
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t1 >>= 16; |
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_Bd = t1; |
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_Cd = A_ + C_; |
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_Dd = B_ + D_; |
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t1 = (int32_t)(xC4S4 * (ip[0*8] + ip[4*8])); |
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t1 >>= 16; |
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E_ = t1; |
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t1 = (int32_t)(xC4S4 * (ip[0*8] - ip[4*8])); |
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t1 >>= 16; |
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F_ = t1; |
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t1 = (int32_t)(xC2S6 * ip[2*8]); |
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t2 = (int32_t)(xC6S2 * ip[6*8]); |
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t1 >>= 16; |
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t2 >>= 16; |
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G_ = t1 + t2; |
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t1 = (int32_t)(xC6S2 * ip[2*8]); |
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t2 = (int32_t)(xC2S6 * ip[6*8]); |
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t1 >>= 16; |
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t2 >>= 16; |
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H_ = t1 - t2; |
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_Ed = E_ - G_; |
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_Gd = E_ + G_; |
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_Add = F_ + _Ad; |
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_Bdd = _Bd - H_; |
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_Fd = F_ - _Ad; |
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_Hd = _Bd + H_; |
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if(type==1){ //HACK |
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_Gd += 16*128; |
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_Add+= 16*128; |
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_Ed += 16*128; |
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_Fd += 16*128; |
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} |
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_Gd += IdctAdjustBeforeShift; |
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_Add += IdctAdjustBeforeShift; |
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_Ed += IdctAdjustBeforeShift; |
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_Fd += IdctAdjustBeforeShift; |
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/* Final sequence of operations over-write original inputs. */ |
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if(type==0){ |
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ip[0*8] = (_Gd + _Cd ) >> 4; |
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ip[7*8] = (_Gd - _Cd ) >> 4; |
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ip[1*8] = (_Add + _Hd ) >> 4; |
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ip[2*8] = (_Add - _Hd ) >> 4; |
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ip[3*8] = (_Ed + _Dd ) >> 4; |
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ip[4*8] = (_Ed - _Dd ) >> 4; |
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ip[5*8] = (_Fd + _Bdd ) >> 4; |
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ip[6*8] = (_Fd - _Bdd ) >> 4; |
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}else if(type==1){ |
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dst[0*stride] = cm[(_Gd + _Cd ) >> 4]; |
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dst[7*stride] = cm[(_Gd - _Cd ) >> 4]; |
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dst[1*stride] = cm[(_Add + _Hd ) >> 4]; |
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dst[2*stride] = cm[(_Add - _Hd ) >> 4]; |
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dst[3*stride] = cm[(_Ed + _Dd ) >> 4]; |
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dst[4*stride] = cm[(_Ed - _Dd ) >> 4]; |
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dst[5*stride] = cm[(_Fd + _Bdd ) >> 4]; |
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dst[6*stride] = cm[(_Fd - _Bdd ) >> 4]; |
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}else{ |
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dst[0*stride] = cm[dst[0*stride] + ((_Gd + _Cd ) >> 4)]; |
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dst[7*stride] = cm[dst[7*stride] + ((_Gd - _Cd ) >> 4)]; |
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dst[1*stride] = cm[dst[1*stride] + ((_Add + _Hd ) >> 4)]; |
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dst[2*stride] = cm[dst[2*stride] + ((_Add - _Hd ) >> 4)]; |
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dst[3*stride] = cm[dst[3*stride] + ((_Ed + _Dd ) >> 4)]; |
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dst[4*stride] = cm[dst[4*stride] + ((_Ed - _Dd ) >> 4)]; |
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dst[5*stride] = cm[dst[5*stride] + ((_Fd + _Bdd ) >> 4)]; |
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dst[6*stride] = cm[dst[6*stride] + ((_Fd - _Bdd ) >> 4)]; |
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} |
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} else { |
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if(type==0){ |
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ip[0*8] = |
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ip[1*8] = |
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ip[2*8] = |
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ip[3*8] = |
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ip[4*8] = |
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ip[5*8] = |
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ip[6*8] = |
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ip[7*8] = ((xC4S4 * ip[0*8] + (IdctAdjustBeforeShift<<16))>>20); |
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}else if(type==1){ |
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dst[0*stride]= |
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dst[1*stride]= |
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dst[2*stride]= |
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dst[3*stride]= |
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dst[4*stride]= |
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dst[5*stride]= |
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dst[6*stride]= |
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dst[7*stride]= 128 + ((xC4S4 * ip[0*8] + (IdctAdjustBeforeShift<<16))>>20); |
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}else{ |
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if(ip[0*8]){ |
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int v= ((xC4S4 * ip[0*8] + (IdctAdjustBeforeShift<<16))>>20); |
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dst[0*stride] = cm[dst[0*stride] + v]; |
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dst[1*stride] = cm[dst[1*stride] + v]; |
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dst[2*stride] = cm[dst[2*stride] + v]; |
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dst[3*stride] = cm[dst[3*stride] + v]; |
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dst[4*stride] = cm[dst[4*stride] + v]; |
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dst[5*stride] = cm[dst[5*stride] + v]; |
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dst[6*stride] = cm[dst[6*stride] + v]; |
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dst[7*stride] = cm[dst[7*stride] + v]; |
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} |
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} |
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} |
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ip++; /* next column */ |
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dst++; |
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} |
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} |
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void ff_vp3_idct_c(DCTELEM *block/* align 16*/){ |
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idct(NULL, 0, block, 0); |
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} |
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void ff_vp3_idct_put_c(uint8_t *dest/*align 8*/, int line_size, DCTELEM *block/*align 16*/){ |
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idct(dest, line_size, block, 1); |
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} |
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void ff_vp3_idct_add_c(uint8_t *dest/*align 8*/, int line_size, DCTELEM *block/*align 16*/){ |
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idct(dest, line_size, block, 2); |
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}
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