X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;f=libavcodec%2Fsimple_idct.c;h=9823a6b7e51bfe8c7082bcdf932e61aa7c539c0a;hb=549d0bdca53af7a6e0c612ab4b03baecf3a5878f;hp=dcf752e163aa460dac01f8203a3a77dc648e1428;hpb=c2a29455e348f136043a0b3a23637924413180dc;p=ffmpeg diff --git a/libavcodec/simple_idct.c b/libavcodec/simple_idct.c index dcf752e163a..9823a6b7e51 100644 --- a/libavcodec/simple_idct.c +++ b/libavcodec/simple_idct.c @@ -3,419 +3,40 @@ * * Copyright (c) 2001 Michael Niedermayer * - * This file is part of FFmpeg. + * This file is part of Libav. * - * FFmpeg is free software; you can redistribute it and/or + * Libav is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2.1 of the License, or (at your option) any later version. * - * FFmpeg is distributed in the hope that it will be useful, + * Libav is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public - * License along with FFmpeg; if not, write to the Free Software + * License along with Libav; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */ /** - * @file simple_idct.c + * @file * simpleidct in C. */ -/* - based upon some outcommented c code from mpeg2dec (idct_mmx.c - written by Aaron Holtzman ) - */ +#include "libavutil/intreadwrite.h" #include "avcodec.h" -#include "dsputil.h" +#include "mathops.h" #include "simple_idct.h" -#if 0 -#define W1 2841 /* 2048*sqrt (2)*cos (1*pi/16) */ -#define W2 2676 /* 2048*sqrt (2)*cos (2*pi/16) */ -#define W3 2408 /* 2048*sqrt (2)*cos (3*pi/16) */ -#define W4 2048 /* 2048*sqrt (2)*cos (4*pi/16) */ -#define W5 1609 /* 2048*sqrt (2)*cos (5*pi/16) */ -#define W6 1108 /* 2048*sqrt (2)*cos (6*pi/16) */ -#define W7 565 /* 2048*sqrt (2)*cos (7*pi/16) */ -#define ROW_SHIFT 8 -#define COL_SHIFT 17 -#else -#define W1 22725 //cos(i*M_PI/16)*sqrt(2)*(1<<14) + 0.5 -#define W2 21407 //cos(i*M_PI/16)*sqrt(2)*(1<<14) + 0.5 -#define W3 19266 //cos(i*M_PI/16)*sqrt(2)*(1<<14) + 0.5 -#define W4 16383 //cos(i*M_PI/16)*sqrt(2)*(1<<14) + 0.5 -#define W5 12873 //cos(i*M_PI/16)*sqrt(2)*(1<<14) + 0.5 -#define W6 8867 //cos(i*M_PI/16)*sqrt(2)*(1<<14) + 0.5 -#define W7 4520 //cos(i*M_PI/16)*sqrt(2)*(1<<14) + 0.5 -#define ROW_SHIFT 11 -#define COL_SHIFT 20 // 6 -#endif - -#if defined(ARCH_POWERPC_405) - -/* signed 16x16 -> 32 multiply add accumulate */ -#define MAC16(rt, ra, rb) \ - asm ("maclhw %0, %2, %3" : "=r" (rt) : "0" (rt), "r" (ra), "r" (rb)); - -/* signed 16x16 -> 32 multiply */ -#define MUL16(rt, ra, rb) \ - asm ("mullhw %0, %1, %2" : "=r" (rt) : "r" (ra), "r" (rb)); - -#else - -/* signed 16x16 -> 32 multiply add accumulate */ -#define MAC16(rt, ra, rb) rt += (ra) * (rb) - -/* signed 16x16 -> 32 multiply */ -#define MUL16(rt, ra, rb) rt = (ra) * (rb) - -#endif - -static inline void idctRowCondDC (DCTELEM * row) -{ - int a0, a1, a2, a3, b0, b1, b2, b3; -#ifdef HAVE_FAST_64BIT - uint64_t temp; -#else - uint32_t temp; -#endif - -#ifdef HAVE_FAST_64BIT -#ifdef WORDS_BIGENDIAN -#define ROW0_MASK 0xffff000000000000LL -#else -#define ROW0_MASK 0xffffLL -#endif - if(sizeof(DCTELEM)==2){ - if ( ((((uint64_t *)row)[0] & ~ROW0_MASK) | - ((uint64_t *)row)[1]) == 0) { - temp = (row[0] << 3) & 0xffff; - temp += temp << 16; - temp += temp << 32; - ((uint64_t *)row)[0] = temp; - ((uint64_t *)row)[1] = temp; - return; - } - }else{ - if (!(row[1]|row[2]|row[3]|row[4]|row[5]|row[6]|row[7])) { - row[0]=row[1]=row[2]=row[3]=row[4]=row[5]=row[6]=row[7]= row[0] << 3; - return; - } - } -#else - if(sizeof(DCTELEM)==2){ - if (!(((uint32_t*)row)[1] | - ((uint32_t*)row)[2] | - ((uint32_t*)row)[3] | - row[1])) { - temp = (row[0] << 3) & 0xffff; - temp += temp << 16; - ((uint32_t*)row)[0]=((uint32_t*)row)[1] = - ((uint32_t*)row)[2]=((uint32_t*)row)[3] = temp; - return; - } - }else{ - if (!(row[1]|row[2]|row[3]|row[4]|row[5]|row[6]|row[7])) { - row[0]=row[1]=row[2]=row[3]=row[4]=row[5]=row[6]=row[7]= row[0] << 3; - return; - } - } -#endif - - a0 = (W4 * row[0]) + (1 << (ROW_SHIFT - 1)); - a1 = a0; - a2 = a0; - a3 = a0; - - /* no need to optimize : gcc does it */ - a0 += W2 * row[2]; - a1 += W6 * row[2]; - a2 -= W6 * row[2]; - a3 -= W2 * row[2]; - - MUL16(b0, W1, row[1]); - MAC16(b0, W3, row[3]); - MUL16(b1, W3, row[1]); - MAC16(b1, -W7, row[3]); - MUL16(b2, W5, row[1]); - MAC16(b2, -W1, row[3]); - MUL16(b3, W7, row[1]); - MAC16(b3, -W5, row[3]); - -#ifdef HAVE_FAST_64BIT - temp = ((uint64_t*)row)[1]; -#else - temp = ((uint32_t*)row)[2] | ((uint32_t*)row)[3]; -#endif - if (temp != 0) { - a0 += W4*row[4] + W6*row[6]; - a1 += - W4*row[4] - W2*row[6]; - a2 += - W4*row[4] + W2*row[6]; - a3 += W4*row[4] - W6*row[6]; - - MAC16(b0, W5, row[5]); - MAC16(b0, W7, row[7]); - - MAC16(b1, -W1, row[5]); - MAC16(b1, -W5, row[7]); - - MAC16(b2, W7, row[5]); - MAC16(b2, W3, row[7]); - - MAC16(b3, W3, row[5]); - MAC16(b3, -W1, row[7]); - } - - row[0] = (a0 + b0) >> ROW_SHIFT; - row[7] = (a0 - b0) >> ROW_SHIFT; - row[1] = (a1 + b1) >> ROW_SHIFT; - row[6] = (a1 - b1) >> ROW_SHIFT; - row[2] = (a2 + b2) >> ROW_SHIFT; - row[5] = (a2 - b2) >> ROW_SHIFT; - row[3] = (a3 + b3) >> ROW_SHIFT; - row[4] = (a3 - b3) >> ROW_SHIFT; -} - -static inline void idctSparseColPut (uint8_t *dest, int line_size, - DCTELEM * col) -{ - int a0, a1, a2, a3, b0, b1, b2, b3; - uint8_t *cm = ff_cropTbl + MAX_NEG_CROP; - - /* XXX: I did that only to give same values as previous code */ - a0 = W4 * (col[8*0] + ((1<<(COL_SHIFT-1))/W4)); - a1 = a0; - a2 = a0; - a3 = a0; - - a0 += + W2*col[8*2]; - a1 += + W6*col[8*2]; - a2 += - W6*col[8*2]; - a3 += - W2*col[8*2]; - - MUL16(b0, W1, col[8*1]); - MUL16(b1, W3, col[8*1]); - MUL16(b2, W5, col[8*1]); - MUL16(b3, W7, col[8*1]); - - MAC16(b0, + W3, col[8*3]); - MAC16(b1, - W7, col[8*3]); - MAC16(b2, - W1, col[8*3]); - MAC16(b3, - W5, col[8*3]); - - if(col[8*4]){ - a0 += + W4*col[8*4]; - a1 += - W4*col[8*4]; - a2 += - W4*col[8*4]; - a3 += + W4*col[8*4]; - } - - if (col[8*5]) { - MAC16(b0, + W5, col[8*5]); - MAC16(b1, - W1, col[8*5]); - MAC16(b2, + W7, col[8*5]); - MAC16(b3, + W3, col[8*5]); - } - - if(col[8*6]){ - a0 += + W6*col[8*6]; - a1 += - W2*col[8*6]; - a2 += + W2*col[8*6]; - a3 += - W6*col[8*6]; - } - - if (col[8*7]) { - MAC16(b0, + W7, col[8*7]); - MAC16(b1, - W5, col[8*7]); - MAC16(b2, + W3, col[8*7]); - MAC16(b3, - W1, col[8*7]); - } - - dest[0] = cm[(a0 + b0) >> COL_SHIFT]; - dest += line_size; - dest[0] = cm[(a1 + b1) >> COL_SHIFT]; - dest += line_size; - dest[0] = cm[(a2 + b2) >> COL_SHIFT]; - dest += line_size; - dest[0] = cm[(a3 + b3) >> COL_SHIFT]; - dest += line_size; - dest[0] = cm[(a3 - b3) >> COL_SHIFT]; - dest += line_size; - dest[0] = cm[(a2 - b2) >> COL_SHIFT]; - dest += line_size; - dest[0] = cm[(a1 - b1) >> COL_SHIFT]; - dest += line_size; - dest[0] = cm[(a0 - b0) >> COL_SHIFT]; -} - -static inline void idctSparseColAdd (uint8_t *dest, int line_size, - DCTELEM * col) -{ - int a0, a1, a2, a3, b0, b1, b2, b3; - uint8_t *cm = ff_cropTbl + MAX_NEG_CROP; - - /* XXX: I did that only to give same values as previous code */ - a0 = W4 * (col[8*0] + ((1<<(COL_SHIFT-1))/W4)); - a1 = a0; - a2 = a0; - a3 = a0; - - a0 += + W2*col[8*2]; - a1 += + W6*col[8*2]; - a2 += - W6*col[8*2]; - a3 += - W2*col[8*2]; - - MUL16(b0, W1, col[8*1]); - MUL16(b1, W3, col[8*1]); - MUL16(b2, W5, col[8*1]); - MUL16(b3, W7, col[8*1]); - - MAC16(b0, + W3, col[8*3]); - MAC16(b1, - W7, col[8*3]); - MAC16(b2, - W1, col[8*3]); - MAC16(b3, - W5, col[8*3]); - - if(col[8*4]){ - a0 += + W4*col[8*4]; - a1 += - W4*col[8*4]; - a2 += - W4*col[8*4]; - a3 += + W4*col[8*4]; - } - - if (col[8*5]) { - MAC16(b0, + W5, col[8*5]); - MAC16(b1, - W1, col[8*5]); - MAC16(b2, + W7, col[8*5]); - MAC16(b3, + W3, col[8*5]); - } - - if(col[8*6]){ - a0 += + W6*col[8*6]; - a1 += - W2*col[8*6]; - a2 += + W2*col[8*6]; - a3 += - W6*col[8*6]; - } - - if (col[8*7]) { - MAC16(b0, + W7, col[8*7]); - MAC16(b1, - W5, col[8*7]); - MAC16(b2, + W3, col[8*7]); - MAC16(b3, - W1, col[8*7]); - } - - dest[0] = cm[dest[0] + ((a0 + b0) >> COL_SHIFT)]; - dest += line_size; - dest[0] = cm[dest[0] + ((a1 + b1) >> COL_SHIFT)]; - dest += line_size; - dest[0] = cm[dest[0] + ((a2 + b2) >> COL_SHIFT)]; - dest += line_size; - dest[0] = cm[dest[0] + ((a3 + b3) >> COL_SHIFT)]; - dest += line_size; - dest[0] = cm[dest[0] + ((a3 - b3) >> COL_SHIFT)]; - dest += line_size; - dest[0] = cm[dest[0] + ((a2 - b2) >> COL_SHIFT)]; - dest += line_size; - dest[0] = cm[dest[0] + ((a1 - b1) >> COL_SHIFT)]; - dest += line_size; - dest[0] = cm[dest[0] + ((a0 - b0) >> COL_SHIFT)]; -} - -static inline void idctSparseCol (DCTELEM * col) -{ - int a0, a1, a2, a3, b0, b1, b2, b3; - - /* XXX: I did that only to give same values as previous code */ - a0 = W4 * (col[8*0] + ((1<<(COL_SHIFT-1))/W4)); - a1 = a0; - a2 = a0; - a3 = a0; - - a0 += + W2*col[8*2]; - a1 += + W6*col[8*2]; - a2 += - W6*col[8*2]; - a3 += - W2*col[8*2]; - - MUL16(b0, W1, col[8*1]); - MUL16(b1, W3, col[8*1]); - MUL16(b2, W5, col[8*1]); - MUL16(b3, W7, col[8*1]); - - MAC16(b0, + W3, col[8*3]); - MAC16(b1, - W7, col[8*3]); - MAC16(b2, - W1, col[8*3]); - MAC16(b3, - W5, col[8*3]); - - if(col[8*4]){ - a0 += + W4*col[8*4]; - a1 += - W4*col[8*4]; - a2 += - W4*col[8*4]; - a3 += + W4*col[8*4]; - } - - if (col[8*5]) { - MAC16(b0, + W5, col[8*5]); - MAC16(b1, - W1, col[8*5]); - MAC16(b2, + W7, col[8*5]); - MAC16(b3, + W3, col[8*5]); - } - - if(col[8*6]){ - a0 += + W6*col[8*6]; - a1 += - W2*col[8*6]; - a2 += + W2*col[8*6]; - a3 += - W6*col[8*6]; - } - - if (col[8*7]) { - MAC16(b0, + W7, col[8*7]); - MAC16(b1, - W5, col[8*7]); - MAC16(b2, + W3, col[8*7]); - MAC16(b3, - W1, col[8*7]); - } - - col[0 ] = ((a0 + b0) >> COL_SHIFT); - col[8 ] = ((a1 + b1) >> COL_SHIFT); - col[16] = ((a2 + b2) >> COL_SHIFT); - col[24] = ((a3 + b3) >> COL_SHIFT); - col[32] = ((a3 - b3) >> COL_SHIFT); - col[40] = ((a2 - b2) >> COL_SHIFT); - col[48] = ((a1 - b1) >> COL_SHIFT); - col[56] = ((a0 - b0) >> COL_SHIFT); -} - -void simple_idct_put(uint8_t *dest, int line_size, DCTELEM *block) -{ - int i; - for(i=0; i<8; i++) - idctRowCondDC(block + i*8); - - for(i=0; i<8; i++) - idctSparseColPut(dest + i, line_size, block + i); -} - -void simple_idct_add(uint8_t *dest, int line_size, DCTELEM *block) -{ - int i; - for(i=0; i<8; i++) - idctRowCondDC(block + i*8); - - for(i=0; i<8; i++) - idctSparseColAdd(dest + i, line_size, block + i); -} - -void simple_idct(DCTELEM *block) -{ - int i; - for(i=0; i<8; i++) - idctRowCondDC(block + i*8); +#define BIT_DEPTH 8 +#include "simple_idct_template.c" +#undef BIT_DEPTH - for(i=0; i<8; i++) - idctSparseCol(block + i); -} +#define BIT_DEPTH 10 +#include "simple_idct_template.c" +#undef BIT_DEPTH /* 2x4x8 idct */ @@ -428,10 +49,9 @@ void simple_idct(DCTELEM *block) and the butterfly must be multiplied by 0.5 * sqrt(2.0) */ #define C_SHIFT (4+1+12) -static inline void idct4col(uint8_t *dest, int line_size, const DCTELEM *col) +static inline void idct4col_put(uint8_t *dest, ptrdiff_t line_size, const int16_t *col) { int c0, c1, c2, c3, a0, a1, a2, a3; - const uint8_t *cm = ff_cropTbl + MAX_NEG_CROP; a0 = col[8*0]; a1 = col[8*2]; @@ -441,13 +61,13 @@ static inline void idct4col(uint8_t *dest, int line_size, const DCTELEM *col) c2 = ((a0 - a2) << (CN_SHIFT - 1)) + (1 << (C_SHIFT - 1)); c1 = a1 * C1 + a3 * C2; c3 = a1 * C2 - a3 * C1; - dest[0] = cm[(c0 + c1) >> C_SHIFT]; + dest[0] = av_clip_uint8((c0 + c1) >> C_SHIFT); dest += line_size; - dest[0] = cm[(c2 + c3) >> C_SHIFT]; + dest[0] = av_clip_uint8((c2 + c3) >> C_SHIFT); dest += line_size; - dest[0] = cm[(c2 - c3) >> C_SHIFT]; + dest[0] = av_clip_uint8((c2 - c3) >> C_SHIFT); dest += line_size; - dest[0] = cm[(c0 - c1) >> C_SHIFT]; + dest[0] = av_clip_uint8((c0 - c1) >> C_SHIFT); } #define BF(k) \ @@ -465,10 +85,10 @@ static inline void idct4col(uint8_t *dest, int line_size, const DCTELEM *col) /* XXX: I think a 1.0/sqrt(2) normalization should be needed to compensate the extra butterfly stage - I don't have the full DV specification */ -void simple_idct248_put(uint8_t *dest, int line_size, DCTELEM *block) +void ff_simple_idct248_put(uint8_t *dest, ptrdiff_t line_size, int16_t *block) { int i; - DCTELEM *ptr; + int16_t *ptr; /* butterfly */ ptr = block; @@ -486,13 +106,13 @@ void simple_idct248_put(uint8_t *dest, int line_size, DCTELEM *block) /* IDCT8 on each line */ for(i=0; i<8; i++) { - idctRowCondDC(block + i*8); + idctRowCondDC_8(block + i*8, 0); } /* IDCT4 and store */ for(i=0;i<8;i++) { - idct4col(dest + i, 2 * line_size, block + i); - idct4col(dest + line_size + i, 2 * line_size, block + 8 + i); + idct4col_put(dest + i, 2 * line_size, block + i); + idct4col_put(dest + line_size + i, 2 * line_size, block + 8 + i); } } @@ -508,10 +128,9 @@ void simple_idct248_put(uint8_t *dest, int line_size, DCTELEM *block) #define C2 C_FIX(0.2705980501) #define C3 C_FIX(0.5) #define C_SHIFT (4+1+12) -static inline void idct4col_add(uint8_t *dest, int line_size, const DCTELEM *col) +static inline void idct4col_add(uint8_t *dest, ptrdiff_t line_size, const int16_t *col) { int c0, c1, c2, c3, a0, a1, a2, a3; - const uint8_t *cm = ff_cropTbl + MAX_NEG_CROP; a0 = col[8*0]; a1 = col[8*1]; @@ -521,13 +140,13 @@ static inline void idct4col_add(uint8_t *dest, int line_size, const DCTELEM *col c2 = (a0 - a2)*C3 + (1 << (C_SHIFT - 1)); c1 = a1 * C1 + a3 * C2; c3 = a1 * C2 - a3 * C1; - dest[0] = cm[dest[0] + ((c0 + c1) >> C_SHIFT)]; + dest[0] = av_clip_uint8(dest[0] + ((c0 + c1) >> C_SHIFT)); dest += line_size; - dest[0] = cm[dest[0] + ((c2 + c3) >> C_SHIFT)]; + dest[0] = av_clip_uint8(dest[0] + ((c2 + c3) >> C_SHIFT)); dest += line_size; - dest[0] = cm[dest[0] + ((c2 - c3) >> C_SHIFT)]; + dest[0] = av_clip_uint8(dest[0] + ((c2 - c3) >> C_SHIFT)); dest += line_size; - dest[0] = cm[dest[0] + ((c0 - c1) >> C_SHIFT)]; + dest[0] = av_clip_uint8(dest[0] + ((c0 - c1) >> C_SHIFT)); } #define RN_SHIFT 15 @@ -536,10 +155,9 @@ static inline void idct4col_add(uint8_t *dest, int line_size, const DCTELEM *col #define R2 R_FIX(0.2705980501) #define R3 R_FIX(0.5) #define R_SHIFT 11 -static inline void idct4row(DCTELEM *row) +static inline void idct4row(int16_t *row) { int c0, c1, c2, c3, a0, a1, a2, a3; - //const uint8_t *cm = ff_cropTbl + MAX_NEG_CROP; a0 = row[0]; a1 = row[1]; @@ -555,13 +173,13 @@ static inline void idct4row(DCTELEM *row) row[3]= (c0 - c1) >> R_SHIFT; } -void simple_idct84_add(uint8_t *dest, int line_size, DCTELEM *block) +void ff_simple_idct84_add(uint8_t *dest, ptrdiff_t line_size, int16_t *block) { int i; /* IDCT8 on each line */ for(i=0; i<4; i++) { - idctRowCondDC(block + i*8); + idctRowCondDC_8(block + i*8, 0); } /* IDCT4 and store */ @@ -570,7 +188,7 @@ void simple_idct84_add(uint8_t *dest, int line_size, DCTELEM *block) } } -void simple_idct48_add(uint8_t *dest, int line_size, DCTELEM *block) +void ff_simple_idct48_add(uint8_t *dest, ptrdiff_t line_size, int16_t *block) { int i; @@ -581,7 +199,37 @@ void simple_idct48_add(uint8_t *dest, int line_size, DCTELEM *block) /* IDCT8 and store */ for(i=0; i<4; i++){ - idctSparseColAdd(dest + i, line_size, block + i); + idctSparseColAdd_8(dest + i, line_size, block + i); } } +void ff_simple_idct44_add(uint8_t *dest, ptrdiff_t line_size, int16_t *block) +{ + int i; + + /* IDCT4 on each line */ + for(i=0; i<4; i++) { + idct4row(block + i*8); + } + + /* IDCT4 and store */ + for(i=0; i<4; i++){ + idct4col_add(dest + i, line_size, block + i); + } +} + +#if CONFIG_PRORES_DECODER +void ff_prores_idct(int16_t *block, const int16_t *qmat) +{ + int i; + + for (i = 0; i < 64; i++) + block[i] *= qmat[i]; + + for (i = 0; i < 8; i++) + idctRowCondDC_10(block + i*8, 2); + + for (i = 0; i < 8; i++) + idctSparseCol_10(block + i); +} +#endif /* CONFIG_PRORES_DECODER */