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author | Paul B Mahol <onemda@gmail.com> | 2021-02-09 19:17:27 +0100 |
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committer | Paul B Mahol <onemda@gmail.com> | 2021-02-24 17:14:03 +0100 |
commit | d69f4be1c6c6e305b4f32235bcab35dcc8c9c98b (patch) | |
tree | bd19357ad2c7bae53f68d5fd31c7e0a7547c22dc /libavcodec/cfhdencdsp.c | |
parent | 767d3f7dcf818a88b7fa9c510b8721f247faee3c (diff) |
avcodec/cfhdenc: refactor DSP code for CFHD encoder
This is needed to implement x86 SIMD.
Diffstat (limited to 'libavcodec/cfhdencdsp.c')
-rw-r--r-- | libavcodec/cfhdencdsp.c | 76 |
1 files changed, 76 insertions, 0 deletions
diff --git a/libavcodec/cfhdencdsp.c b/libavcodec/cfhdencdsp.c new file mode 100644 index 0000000000..0becb76d1d --- /dev/null +++ b/libavcodec/cfhdencdsp.c @@ -0,0 +1,76 @@ +/* + * Copyright (c) 2015-2016 Kieran Kunhya <kieran@kunhya.com> + * + * This file is part of FFmpeg. + * + * 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. + * + * 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 FFmpeg; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA + */ + +#include "libavutil/attributes.h" +#include "libavutil/common.h" +#include "libavutil/avassert.h" + +#include "cfhdencdsp.h" + +static av_always_inline void filter(int16_t *input, ptrdiff_t in_stride, + int16_t *low, ptrdiff_t low_stride, + int16_t *high, ptrdiff_t high_stride, + int len) +{ + low[(0>>1) * low_stride] = av_clip_int16(input[0*in_stride] + input[1*in_stride]); + high[(0>>1) * high_stride] = av_clip_int16((5 * input[0*in_stride] - 11 * input[1*in_stride] + + 4 * input[2*in_stride] + 4 * input[3*in_stride] - + 1 * input[4*in_stride] - 1 * input[5*in_stride] + 4) >> 3); + + for (int i = 2; i < len - 2; i += 2) { + low[(i>>1) * low_stride] = av_clip_int16(input[i*in_stride] + input[(i+1)*in_stride]); + high[(i>>1) * high_stride] = av_clip_int16(((-input[(i-2)*in_stride] - input[(i-1)*in_stride] + + input[(i+2)*in_stride] + input[(i+3)*in_stride] + 4) >> 3) + + input[(i+0)*in_stride] - input[(i+1)*in_stride]); + } + + low[((len-2)>>1) * low_stride] = av_clip_int16(input[((len-2)+0)*in_stride] + input[((len-2)+1)*in_stride]); + high[((len-2)>>1) * high_stride] = av_clip_int16((11* input[((len-2)+0)*in_stride] - 5 * input[((len-2)+1)*in_stride] - + 4 * input[((len-2)-1)*in_stride] - 4 * input[((len-2)-2)*in_stride] + + 1 * input[((len-2)-3)*in_stride] + 1 * input[((len-2)-4)*in_stride] + 4) >> 3); +} + +static void horiz_filter(int16_t *input, int16_t *low, int16_t *high, + ptrdiff_t in_stride, ptrdiff_t low_stride, + ptrdiff_t high_stride, + int width, int height) +{ + for (int i = 0; i < height; i++) { + filter(input, 1, low, 1, high, 1, width); + input += in_stride; + low += low_stride; + high += high_stride; + } +} + +static void vert_filter(int16_t *input, int16_t *low, int16_t *high, + ptrdiff_t in_stride, ptrdiff_t low_stride, + ptrdiff_t high_stride, + int width, int height) +{ + for (int i = 0; i < width; i++) + filter(&input[i], in_stride, &low[i], low_stride, &high[i], high_stride, height); +} + +av_cold void ff_cfhdencdsp_init(CFHDEncDSPContext *c) +{ + c->horiz_filter = horiz_filter; + c->vert_filter = vert_filter; +} |