Paul Davis
c4ac437490
* use explicit operator<< and operator>> that in turn use PBD::EnumWriter when serializing and deserializing to/from rc files * adds scrolling in mixer window (from 2.X) * BBT math stuff - untested, but basically operational * move LocaleGuard into its own file(s) in libs/pbd * Tempo now uses nframes64_t everywhere (except for sample rate values) * as in 2.X, use mkstemp and hack to avoid temp file nonsense, and remove erroneous free() from disk stats output git-svn-id: svn://localhost/ardour2/branches/3.0@5961 d708f5d6-7413-0410-9779-e7cbd77b26cf
117 lines
3.3 KiB
C++
117 lines
3.3 KiB
C++
/*
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Copyright (C) 2007 Paul sDavis
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Written by Sampo Savolainen
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program 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
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#include <xmmintrin.h>
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#include "ardour/types.h"
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void
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x86_sse_find_peaks(const ARDOUR::Sample* buf, ARDOUR::nframes_t nframes, float *min, float *max)
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{
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__m128 current_max, current_min, work;
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// Load max and min values into all four slots of the XMM registers
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current_min = _mm_set1_ps(*min);
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current_max = _mm_set1_ps(*max);
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// Work input until "buf" reaches 16 byte alignment
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while ( ((unsigned long)buf) % 16 != 0 && nframes > 0) {
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// Load the next float into the work buffer
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work = _mm_set1_ps(*buf);
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current_min = _mm_min_ps(current_min, work);
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current_max = _mm_max_ps(current_max, work);
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buf++;
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nframes--;
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}
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// use 64 byte prefetch for quadruple quads
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while (nframes >= 16) {
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__builtin_prefetch(buf+64,0,0);
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work = _mm_load_ps(buf);
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current_min = _mm_min_ps(current_min, work);
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current_max = _mm_max_ps(current_max, work);
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buf+=4;
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work = _mm_load_ps(buf);
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current_min = _mm_min_ps(current_min, work);
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current_max = _mm_max_ps(current_max, work);
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buf+=4;
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work = _mm_load_ps(buf);
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current_min = _mm_min_ps(current_min, work);
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current_max = _mm_max_ps(current_max, work);
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buf+=4;
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work = _mm_load_ps(buf);
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current_min = _mm_min_ps(current_min, work);
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current_max = _mm_max_ps(current_max, work);
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buf+=4;
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nframes-=16;
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}
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// work through aligned buffers
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while (nframes >= 4) {
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work = _mm_load_ps(buf);
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current_min = _mm_min_ps(current_min, work);
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current_max = _mm_max_ps(current_max, work);
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buf+=4;
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nframes-=4;
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}
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// work through the rest < 4 samples
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while ( nframes > 0) {
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// Load the next float into the work buffer
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work = _mm_set1_ps(*buf);
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current_min = _mm_min_ps(current_min, work);
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current_max = _mm_max_ps(current_max, work);
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buf++;
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nframes--;
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}
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// Find min & max value in current_max through shuffle tricks
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work = current_min;
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work = _mm_shuffle_ps(work, work, _MM_SHUFFLE(2, 3, 0, 1));
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work = _mm_min_ps (work, current_min);
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current_min = work;
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work = _mm_shuffle_ps(work, work, _MM_SHUFFLE(1, 0, 3, 2));
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work = _mm_min_ps (work, current_min);
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_mm_store_ss(min, work);
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work = current_max;
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work = _mm_shuffle_ps(work, work, _MM_SHUFFLE(2, 3, 0, 1));
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work = _mm_max_ps (work, current_max);
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current_max = work;
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work = _mm_shuffle_ps(work, work, _MM_SHUFFLE(1, 0, 3, 2));
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work = _mm_max_ps (work, current_max);
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_mm_store_ss(max, work);
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}
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