diff options
Diffstat (limited to 'libavcodec/simple_idct_template.c')
| -rw-r--r-- | libavcodec/simple_idct_template.c | 48 |
1 files changed, 31 insertions, 17 deletions
diff --git a/libavcodec/simple_idct_template.c b/libavcodec/simple_idct_template.c index 367bc34012..ac04923d96 100644 --- a/libavcodec/simple_idct_template.c +++ b/libavcodec/simple_idct_template.c @@ -3,20 +3,20 @@ * * Copyright (c) 2001 Michael Niedermayer <michaelni@gmx.at> * - * This file is part of Libav. + * This file is part of FFmpeg. * - * Libav is free software; you can redistribute it and/or + * FFmpeg 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. * - * Libav is distributed in the hope that it will be useful, + * FFmpeg 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 Libav; if not, write to the Free Software + * License along with FFmpeg; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */ @@ -62,19 +62,33 @@ #define MUL(a, b) MUL16(a, b) #define MAC(a, b, c) MAC16(a, b, c) -#elif BIT_DEPTH == 10 +#elif BIT_DEPTH == 10 || BIT_DEPTH == 12 -#define W1 90901 -#define W2 85627 -#define W3 77062 -#define W4 65535 -#define W5 51491 -#define W6 35468 -#define W7 18081 +#if BIT_DEPTH == 10 +#define W1 (22725*4) // 90901 +#define W2 (21407*4) // 85627 +#define W3 (19265*4) // 77062 +#define W4 (16384*4) // 65535 +#define W5 (12873*4) // 51491 +#define W6 ( 8867*4) // 35468 +#define W7 ( 4520*4) // 18081 #define ROW_SHIFT 15 #define COL_SHIFT 20 #define DC_SHIFT 1 +#else +#define W1 45451 +#define W2 42813 +#define W3 38531 +#define W4 32767 +#define W5 25746 +#define W6 17734 +#define W7 9041 + +#define ROW_SHIFT 16 +#define COL_SHIFT 17 +#define DC_SHIFT -1 +#endif #define MUL(a, b) ((a) * (b)) #define MAC(a, b, c) ((a) += (b) * (c)) @@ -93,10 +107,10 @@ static inline void FUNC(idctRowCondDC)(int16_t *row, int extra_shift) #define ROW0_MASK (0xffffLL << 48 * HAVE_BIGENDIAN) if (((((uint64_t *)row)[0] & ~ROW0_MASK) | ((uint64_t *)row)[1]) == 0) { uint64_t temp; - if (DC_SHIFT - extra_shift > 0) { + if (DC_SHIFT - extra_shift >= 0) { temp = (row[0] << (DC_SHIFT - extra_shift)) & 0xffff; } else { - temp = (row[0] >> (extra_shift - DC_SHIFT)) & 0xffff; + temp = ((row[0] + (1<<(extra_shift - DC_SHIFT-1))) >> (extra_shift - DC_SHIFT)) & 0xffff; } temp += temp << 16; temp += temp << 32; @@ -110,10 +124,10 @@ static inline void FUNC(idctRowCondDC)(int16_t *row, int extra_shift) ((uint32_t*)row)[3] | row[1])) { uint32_t temp; - if (DC_SHIFT - extra_shift > 0) { + if (DC_SHIFT - extra_shift >= 0) { temp = (row[0] << (DC_SHIFT - extra_shift)) & 0xffff; } else { - temp = (row[0] >> (extra_shift - DC_SHIFT)) & 0xffff; + temp = ((row[0] + (1<<(extra_shift - DC_SHIFT-1))) >> (extra_shift - DC_SHIFT)) & 0xffff; } temp += temp << 16; ((uint32_t*)row)[0]=((uint32_t*)row)[1] = @@ -122,7 +136,7 @@ static inline void FUNC(idctRowCondDC)(int16_t *row, int extra_shift) } #endif - a0 = (W4 * row[0]) + (1 << (ROW_SHIFT - 1)); + a0 = (W4 * row[0]) + (1 << (ROW_SHIFT + extra_shift - 1)); a1 = a0; a2 = a0; a3 = a0; |