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https://github.com/FFmpeg/FFmpeg.git
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40e6575aa3
This is more spec-compliant because it does not rely on dead-code elimination by the compiler. Especially MSVC has problems with this, as can be seen in https://ffmpeg.org/pipermail/ffmpeg-devel/2022-May/296373.html or https://ffmpeg.org/pipermail/ffmpeg-devel/2022-May/297022.html This commit does not eliminate every instance where we rely on dead code elimination: It only tackles branching to the initialization of arch-specific dsp code, not e.g. all uses of CONFIG_ and HAVE_ checks. But maybe it is already enough to compile FFmpeg with MSVC with whole-programm-optimizations enabled (if one does not disable too many components). Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
81 lines
2.4 KiB
C
81 lines
2.4 KiB
C
/*
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* Copyright (C) 2004-2010 Michael Niedermayer <michaelni@gmx.at>
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* Copyright (C) 2008 David Conrad
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg 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 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg 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 FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include "libavutil/attributes.h"
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#include "libavutil/common.h"
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#include "dirac_dwt.h"
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#define TEMPLATE_8bit
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#include "dirac_dwt_template.c"
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#define TEMPLATE_10bit
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#include "dirac_dwt_template.c"
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#define TEMPLATE_12bit
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#include "dirac_dwt_template.c"
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int ff_spatial_idwt_init(DWTContext *d, DWTPlane *p, enum dwt_type type,
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int decomposition_count, int bit_depth)
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{
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int ret = 0;
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d->buffer = p->buf;
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d->width = p->width;
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d->height = p->height;
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d->stride = p->stride;
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d->temp = p->tmp;
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d->decomposition_count = decomposition_count;
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if (bit_depth == 8)
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ret = ff_spatial_idwt_init_8bit(d, type);
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else if (bit_depth == 10)
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ret = ff_spatial_idwt_init_10bit(d, type);
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else if (bit_depth == 12)
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ret = ff_spatial_idwt_init_12bit(d, type);
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else
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av_log(NULL, AV_LOG_WARNING, "Unsupported bit depth = %i\n", bit_depth);
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if (ret) {
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av_log(NULL, AV_LOG_ERROR, "Unknown wavelet type %d\n", type);
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return AVERROR_INVALIDDATA;
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}
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#if ARCH_X86
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if (bit_depth == 8)
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ff_spatial_idwt_init_x86(d, type);
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#endif
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return 0;
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}
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void ff_spatial_idwt_slice2(DWTContext *d, int y)
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{
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int level, support = d->support;
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for (level = d->decomposition_count-1; level >= 0; level--) {
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int wl = d->width >> level;
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int hl = d->height >> level;
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int stride_l = d->stride << level;
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while (d->cs[level].y <= FFMIN((y>>level)+support, hl))
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d->spatial_compose(d, level, wl, hl, stride_l);
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}
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}
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