/usr/include/CLAM/SndPcm.hxx is in libclam-dev 1.4.0-7.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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* Copyright (c) 2001-2004 MUSIC TECHNOLOGY GROUP (MTG)
* UNIVERSITAT POMPEU FABRA
*
*
* 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
*/
/* alsa 0.9 backwards compatibility for alsa 1.0 */
#define ALSA_PCM_OLD_HW_PARAMS_API
#define ALSA_PCM_OLD_SW_PARAMS_API
#include <alsa/asoundlib.h>
#include "Err.hxx"
class SndPcmError : public CLAM::Err
{
public:
SndPcmError(const char* _str)
:Err(_str){
}
};
class SndPcm
{
public:
snd_pcm_format_t format;
int rate;
int channels_in;
int channels_out;
int latency;
int latency_min; /* in frames / 2 */
int latency_max; /* in frames / 2 */
int block; /* block mode */
int tick_time; /* disabled, otherwise in us */
int tick_time_ok;
snd_pcm_t *phandle, *chandle;
char error_str[1024];
void cat_error(const char* fmt,...);
void ReadBuf(short* data)
{
int res = readbuf(chandle,(char*) data,latency);
if (res>=0) return;
if (res == -EPIPE)
// throw(SndPcmError("SndPcm::ReadBuf() Buffer Overrun!\n"));
RecoverXRun(data);
}
void WriteBuf(short* data)
{
int res = writebuf(phandle,(char*) data,latency);
if (res>=0) return;
if (res == -EPIPE)
// throw(SndPcmError("SndPcm::WriteBuf() Buffer Underrun!\n"));
RecoverXRun(data);
}
void ReadBuf(short* data,int len)
{
int res = readbuf(chandle,(char*) data,len);
if (res>=0) return;
if (res == -EPIPE)
// throw(SndPcmError("SndPcm::ReadBuf() Buffer Overrun!\n"));
RecoverXRun(data);
}
void WriteBuf(short* data,int len)
{
int res = writebuf(phandle,(char*) data,len);
if (res>=0) return;
if (res == -EPIPE)
// throw(SndPcmError("SndPcm::WriteBuf() Buffer Underrun!\n"));
RecoverXRun(data);
}
SndPcm(int irate,int ichannels_in,int ichannels_out,int ilatency,
const char* pdevice,const char* cdevice);
~SndPcm();
void Start(void);
void Stop(void);
void RecoverXRun(short* data);
void Poll(void);
private:
/*
* The functions which follow are taken from the latency test included
* in the ALSA source distribution, with the following copyright note:
*
* Latency test program
*
* Author: Jaroslav Kysela <perex@suse.cz>
*
* Author of bandpass filter sweep effect:
* Maarten de Boer <mdeboer@iua.upf.es>
*
* This small demo program can be used for measuring latency between
* capture and playback. This latency is measured from driver (diff when
* playback and capture was started). Scheduler is set to SCHED_RR.
*
*
* 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
*/
int setparams_stream(snd_pcm_t *handle,
snd_pcm_hw_params_t *params,
int channels,
const char *id);
int setparams_bufsize(snd_pcm_t *handle,
snd_pcm_hw_params_t *params,
snd_pcm_hw_params_t *tparams,
snd_pcm_uframes_t bufsize,
const char *id);
int setparams_set(snd_pcm_t *handle,
snd_pcm_hw_params_t *params,
snd_pcm_sw_params_t *swparams,
const char *id);
int setparams(snd_pcm_t *phandle, snd_pcm_t *chandle, int *bufsize);
long readbuf(snd_pcm_t *handle, char *buf, long len);
long writebuf(snd_pcm_t *handle, char *buf, long len);
};
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