130 lines
3.6 KiB
C
130 lines
3.6 KiB
C
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/*******************************************************************************/
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/* Copyright (C) 2008 Jonathan Moore Liles */
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/* */
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/* This program is free software; you can redistribute it and/or modify it */
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/* under the terms of the GNU General Public License as published by the */
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/* Free Software Foundation; either version 2 of the License, or (at your */
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/* option) any later version. */
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/* */
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/* This program is distributed in the hope that it will be useful, but WITHOUT */
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/* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or */
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/* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for */
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/* more details. */
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/* */
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/* You should have received a copy of the GNU General Public License along */
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/* with This program; see the file COPYING. If not,write to the Free Software */
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/* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
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/*******************************************************************************/
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/* General DSP related functions. */
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#include "dsp.h"
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#include "string.h" // for memset.
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/* TODO: these functions are all targets for optimization (SSE?) */
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void
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buffer_apply_gain ( sample_t *buf, nframes_t nframes, float g )
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{
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if ( g != 1.0f )
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while ( nframes-- )
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*(buf++) *= g;
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}
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void
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buffer_apply_gain_buffer ( sample_t *buf, const sample_t *gainbuf, nframes_t nframes )
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{
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while ( nframes-- )
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*(buf++) *= *(gainbuf++);
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}
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void
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buffer_copy_and_apply_gain_buffer ( sample_t *dst, const sample_t *src, const sample_t *gainbuf, nframes_t nframes )
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{
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while ( nframes-- )
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*(dst++) = *(src++) * *(gainbuf++);
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}
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void
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buffer_mix ( sample_t *dst, const sample_t *src, nframes_t nframes )
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{
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while ( nframes-- )
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*(dst++) += *(src++);
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}
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void
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buffer_mix_with_gain ( sample_t *dst, const sample_t *src, nframes_t nframes, float g )
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{
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while ( nframes-- )
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*(dst++) += *(src++) * g;
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}
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void
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buffer_interleave_one_channel ( sample_t *dst, const sample_t *src, int channel, int channels, nframes_t nframes )
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{
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dst += channel;
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while ( nframes-- )
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{
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*dst = *(src++);
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dst += channels;
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}
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}
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void
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buffer_interleave_one_channel_and_mix ( sample_t *dst, const sample_t *src, int channel, int channels, nframes_t nframes )
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{
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dst += channel;
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while ( nframes-- )
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{
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*dst += *(src++);
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dst += channels;
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}
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}
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void
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buffer_deinterleave_one_channel ( sample_t *dst, const sample_t *src, int channel, int channels, nframes_t nframes )
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{
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src += channel;
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while ( nframes-- )
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{
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*(dst++) = *src;
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src += channels;
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}
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}
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void
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buffer_fill_with_silence ( sample_t *buf, nframes_t nframes )
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{
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memset( buf, 0, nframes * sizeof( sample_t ) );
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}
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bool
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buffer_is_digital_black ( sample_t *buf, nframes_t nframes )
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{
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while ( nframes-- )
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{
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if ( 0 != buf[nframes] )
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return false;
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}
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return true;
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}
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void
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buffer_copy ( sample_t *dst, const sample_t *src, nframes_t nframes )
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{
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memcpy( dst, src, nframes * sizeof( sample_t ) );
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}
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void
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buffer_copy_and_apply_gain ( sample_t *dst, const sample_t *src, nframes_t nframes, float gain )
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{
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memcpy( dst, src, nframes * sizeof( sample_t ) );
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buffer_apply_gain( dst, nframes, gain );
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}
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