Audio.h
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上传日期:2015-12-05
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- /*
- * Copyright (C) 2003-2005 Gabest
- * http://www.gabest.org
- *
- * 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, 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 GNU Make; see the file COPYING. If not, write to
- * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
- * http://www.gnu.org/copyleft/gpl.html
- *
- */
- #pragma once
- #include <windows.h>
- #include <MMREG.H>
- #include <mmsystem.h>
- #include <msacm.h>
- typedef long (*AudioPointSampler)(void *, void *, long, long, long);
- typedef long (*AudioDownSampler)(void *, void *, long *, int, long, long, long);
- class AudioStreamResampler
- {
- private:
- AudioPointSampler ptsampleRout;
- AudioDownSampler dnsampleRout;
- long samp_frac;
- long accum;
- int holdover;
- long *filter_bank;
- int filter_width;
- bool fHighQuality;
- enum { BUFFER_SIZE=512 };
- BYTE cbuffer[4*BUFFER_SIZE];
- int bps;
- public:
- AudioStreamResampler(int bps, long org_rate, long new_rate, bool fHighQuality);
- ~AudioStreamResampler();
- long Downsample(void* input, long samplesin, void* output, long samplesout);
- };