diff options
Diffstat (limited to 'libavcodec/simple_idct.c')
| -rw-r--r-- | libavcodec/simple_idct.c | 35 |
1 files changed, 22 insertions, 13 deletions
diff --git a/libavcodec/simple_idct.c b/libavcodec/simple_idct.c index 9823a6b7e5..1d05b2fe08 100644 --- a/libavcodec/simple_idct.c +++ b/libavcodec/simple_idct.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 */ @@ -36,6 +36,15 @@ #define BIT_DEPTH 10 #include "simple_idct_template.c" + +#define EXTRA_SHIFT 2 +#include "simple_idct_template.c" + +#undef EXTRA_SHIFT +#undef BIT_DEPTH + +#define BIT_DEPTH 12 +#include "simple_idct_template.c" #undef BIT_DEPTH /* 2x4x8 idct */ @@ -57,8 +66,8 @@ static inline void idct4col_put(uint8_t *dest, ptrdiff_t line_size, const int16_ a1 = col[8*2]; a2 = col[8*4]; a3 = col[8*6]; - c0 = ((a0 + a2) << (CN_SHIFT - 1)) + (1 << (C_SHIFT - 1)); - c2 = ((a0 - a2) << (CN_SHIFT - 1)) + (1 << (C_SHIFT - 1)); + c0 = ((a0 + a2) * (1 << CN_SHIFT - 1)) + (1 << (C_SHIFT - 1)); + c2 = ((a0 - a2) * (1 << CN_SHIFT - 1)) + (1 << (C_SHIFT - 1)); c1 = a1 * C1 + a3 * C2; c3 = a1 * C2 - a3 * C1; dest[0] = av_clip_uint8((c0 + c1) >> C_SHIFT); @@ -123,7 +132,7 @@ void ff_simple_idct248_put(uint8_t *dest, ptrdiff_t line_size, int16_t *block) #undef C1 #undef C2 #define CN_SHIFT 12 -#define C_FIX(x) ((int)((x) * 1.414213562 * (1 << CN_SHIFT) + 0.5)) +#define C_FIX(x) ((int)((x) * M_SQRT2 * (1 << CN_SHIFT) + 0.5)) #define C1 C_FIX(0.6532814824) #define C2 C_FIX(0.2705980501) #define C3 C_FIX(0.5) @@ -150,7 +159,7 @@ static inline void idct4col_add(uint8_t *dest, ptrdiff_t line_size, const int16_ } #define RN_SHIFT 15 -#define R_FIX(x) ((int)((x) * 1.414213562 * (1 << RN_SHIFT) + 0.5)) +#define R_FIX(x) ((int)((x) * M_SQRT2 * (1 << RN_SHIFT) + 0.5)) #define R1 R_FIX(0.6532814824) #define R2 R_FIX(0.2705980501) #define R3 R_FIX(0.5) @@ -218,7 +227,6 @@ void ff_simple_idct44_add(uint8_t *dest, ptrdiff_t line_size, int16_t *block) } } -#if CONFIG_PRORES_DECODER void ff_prores_idct(int16_t *block, const int16_t *qmat) { int i; @@ -227,9 +235,10 @@ void ff_prores_idct(int16_t *block, const int16_t *qmat) block[i] *= qmat[i]; for (i = 0; i < 8; i++) - idctRowCondDC_10(block + i*8, 2); + idctRowCondDC_extrashift_10(block + i*8, 2); - for (i = 0; i < 8; i++) - idctSparseCol_10(block + i); + for (i = 0; i < 8; i++) { + block[i] += 8192; + idctSparseCol_extrashift_10(block + i); + } } -#endif /* CONFIG_PRORES_DECODER */ |