rollback to 3428, before the mysterious removal of libs/* at 3431/3432

git-svn-id: svn://localhost/ardour2/branches/3.0@3435 d708f5d6-7413-0410-9779-e7cbd77b26cf

1 files changed, 176 insertions, 0 deletions

diff --git a/libs/ardour/mix.cc b/libs/ardour/mix.cc
new file mode 100644
index 0000000000..726d375453
--- /dev/null
+++ b/libs/ardour/mix.cc
@@ -0,0 +1,176 @@
+/*
+    Copyright (C) 2000-2005 Paul Davis
+
+    This program is free software; you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation; either version 2 of the License, or
+    (at your option) any later version.
+
+    This program 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 General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program; if not, write to the Free Software
+    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+
+*/
+
+#include <cmath>
+#include <ardour/types.h>
+#include <ardour/utils.h>
+#include <ardour/mix.h>
+#include <stdint.h>
+
+using namespace ARDOUR;
+
+#if defined (ARCH_X86) && defined (BUILD_SSE_OPTIMIZATIONS)
+// Debug wrappers
+
+float
+debug_compute_peak (ARDOUR::Sample *buf, nframes_t nsamples, float current) 
+{
+	if ( ((intptr_t)buf % 16) != 0) {
+		cerr << "compute_peak(): buffer unaligned!" << endl;
+	}
+
+	return x86_sse_compute_peak(buf, nsamples, current);
+}
+
+void
+debug_apply_gain_to_buffer (ARDOUR::Sample *buf, nframes_t nframes, float gain)
+{
+	if ( ((intptr_t)buf % 16) != 0) {
+		cerr << "apply_gain_to_buffer(): buffer unaligned!" << endl;
+	}
+
+	x86_sse_apply_gain_to_buffer(buf, nframes, gain);
+}
+
+void
+debug_mix_buffers_with_gain (ARDOUR::Sample *dst, ARDOUR::Sample *src, nframes_t nframes, float gain)
+{
+	if ( ((intptr_t)dst & 15) != 0) {
+		cerr << "mix_buffers_with_gain(): dst unaligned!" << endl;
+	}
+
+	if ( ((intptr_t)dst & 15) != ((intptr_t)src & 15) ) {
+		cerr << "mix_buffers_with_gain(): dst & src don't have the same alignment!" << endl;
+		mix_buffers_with_gain(dst, src, nframes, gain);
+	} else {
+		x86_sse_mix_buffers_with_gain(dst, src, nframes, gain);
+	}
+}
+
+void
+debug_mix_buffers_no_gain (ARDOUR::Sample *dst, ARDOUR::Sample *src, nframes_t nframes)
+{
+	if ( ((intptr_t)dst & 15) != 0) {
+		cerr << "mix_buffers_no_gain(): dst unaligned!" << endl;
+	}
+
+	if ( ((intptr_t)dst & 15) != ((intptr_t)src & 15) ) {
+		cerr << "mix_buffers_no_gain(): dst & src don't have the same alignment!" << endl;
+		mix_buffers_no_gain(dst, src, nframes);
+	} else {
+		x86_sse_mix_buffers_no_gain(dst, src, nframes);
+	}
+}
+
+#endif
+
+
+float
+default_compute_peak (const ARDOUR::Sample * buf, nframes_t nsamples, float current) 
+{
+	for (nframes_t i = 0; i < nsamples; ++i) {
+		current = f_max (current, fabsf (buf[i]));
+	}
+
+	return current;
+}	
+
+void
+default_find_peaks (const ARDOUR::Sample * buf, nframes_t nframes, float *min, float *max)
+{
+	nframes_t i;
+	float a, b;
+
+	a = *max;
+	b = *min;
+
+	for (i = 0; i < nframes; i++) 
+	{
+		a = fmax (buf[i], a);
+		b = fmin (buf[i], b);
+	}
+
+	*max = a;
+	*min = b;
+}
+
+void
+default_apply_gain_to_buffer (ARDOUR::Sample * buf, nframes_t nframes, float gain)
+{		
+	for (nframes_t i=0; i<nframes; i++)
+		buf[i] *= gain;
+}
+
+void
+default_mix_buffers_with_gain (ARDOUR::Sample * dst, const ARDOUR::Sample * src, nframes_t nframes, float gain)
+{
+	for (nframes_t i = 0; i < nframes; i++) {
+		dst[i] += src[i] * gain;
+	}
+}
+
+void
+default_mix_buffers_no_gain (ARDOUR::Sample * dst, const ARDOUR::Sample * src, nframes_t nframes)
+{
+	for (nframes_t i=0; i < nframes; i++) {
+		dst[i] += src[i];
+	}
+}
+
+#if defined (__APPLE__) && defined (BUILD_VECLIB_OPTIMIZATIONS)
+#include <Accelerate/Accelerate.h>
+
+float
+veclib_compute_peak (const ARDOUR::Sample * buf, nframes_t nsamples, float current)
+{
+	float tmpmax = 0.0f;
+	vDSP_maxmgv(buf, 1, &tmpmax, nsamples);
+	return f_max(current, tmpmax);
+}
+
+void
+veclib_find_peaks (const ARDOUR::Sample * buf, nframes_t nframes, float *min, float *max)
+{
+	vDSP_maxv (const_cast<ARDOUR::Sample*>(buf), 1, max, nframes);
+	vDSP_minv (const_cast<ARDOUR::Sample*>(buf), 1, min, nframes);
+}
+
+void
+veclib_apply_gain_to_buffer (ARDOUR::Sample * buf, nframes_t nframes, float gain)
+{
+	vDSP_vsmul(buf, 1, &gain, buf, 1, nframes);
+}
+
+void
+veclib_mix_buffers_with_gain (ARDOUR::Sample * dst, const ARDOUR::Sample * src, nframes_t nframes, float gain)
+{
+	vDSP_vsma(src, 1, &gain, dst, 1, dst, 1, nframes);
+}
+
+void
+veclib_mix_buffers_no_gain (ARDOUR::Sample * dst, const ARDOUR::Sample * src, nframes_t nframes)
+{
+	// It seems that a vector mult only operation does not exist...
+	float gain = 1.0f;
+	vDSP_vsma(src, 1, &gain, dst, 1, dst, 1, nframes);
+}
+
+#endif
+		
+