diff options
author | Robert Jonsson <spamatica@gmail.com> | 2009-12-27 11:30:35 +0000 |
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committer | Robert Jonsson <spamatica@gmail.com> | 2009-12-27 11:30:35 +0000 |
commit | b703eab295330e6f81564fbb39a10a1a2fdd2f54 (patch) | |
tree | e46b5c9a6bc22fd661c15d1d2123f5bf631cef80 /muse_qt4_evolution/al/dsp.h | |
parent | 5d5fa0fdf913907edbc3d2d29a7548f0cb658c94 (diff) |
moved old qt4 branch
Diffstat (limited to 'muse_qt4_evolution/al/dsp.h')
-rw-r--r-- | muse_qt4_evolution/al/dsp.h | 83 |
1 files changed, 83 insertions, 0 deletions
diff --git a/muse_qt4_evolution/al/dsp.h b/muse_qt4_evolution/al/dsp.h new file mode 100644 index 00000000..6c7123ac --- /dev/null +++ b/muse_qt4_evolution/al/dsp.h @@ -0,0 +1,83 @@ +//============================================================================= +// AL +// Audio Utility Library +// $Id:$ +// +// Copyright (C) 2002-2006 by Werner Schweer and others +// +// This program is free software; you can redistribute it and/or modify +// it under the terms of the GNU General Public License version 2. +// +// 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. +//============================================================================= + +#ifndef __DSP_H__ +#define __DSP_H__ + +namespace AL { + +//--------------------------------------------------------- +// f_max +//--------------------------------------------------------- + +static inline float f_max(float x, float a) + { + x -= a; + x += fabsf(x); + x *= 0.5f; + x += a; + return x; + } + +//--------------------------------------------------------- +// Dsp +// standard version of all dsp routines without any +// hw acceleration +//--------------------------------------------------------- + +class Dsp { + public: + Dsp() {} + virtual ~Dsp() {} + + virtual float peak(float* buf, unsigned n, float current) { + for (unsigned i = 0; i < n; ++i) + current = f_max(current, fabsf(buf[i])); + return current; + } + virtual void applyGainToBuffer(float* buf, unsigned n, float gain) { + for (unsigned i = 0; i < n; ++i) + buf[i] *= gain; + } + virtual void mixWithGain(float* dst, float* src, unsigned n, float gain) { + for (unsigned i = 0; i < n; ++i) + dst[i] += src[i] * gain; + } + virtual void mix(float* dst, float* src, unsigned n) { + for (unsigned i = 0; i < n; ++i) + dst[i] += src[i]; + } + virtual void cpy(float* dst, float* src, unsigned n) { +#if defined(ARCH_X86) || defined(ARCH_X86_64) + register unsinged long int dummy; + __asm__ __volatile__ "rep; movsl" :"=&D"(dst), "=&S"(src), "=&c"(dummy) :"0" (to), "1" (from),"2" (n) : "memory"); +#else + memcpy(dst, src, sizeof(float) * n); +#endif + } + }; + +extern void initDsp(); +extern Dsp* dsp; + +} + +#endif + |