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/*
** ClanLib SDK
** Copyright (c) 1997-2005 The ClanLib Team
**
** This software is provided 'as-is', without any express or implied
** warranty. In no event will the authors be held liable for any damages
** arising from the use of this software.
**
** Permission is granted to anyone to use this software for any purpose,
** including commercial applications, and to alter it and redistribute it
** freely, subject to the following restrictions:
**
** 1. The origin of this software must not be misrepresented; you must not
** claim that you wrote the original software. If you use this software
** in a product, an acknowledgment in the product documentation would be
** appreciated but is not required.
** 2. Altered source versions must be plainly marked as such, and must not be
** misrepresented as being the original software.
** 3. This notice may not be removed or altered from any source distribution.
**
** Note: Some of the libraries ClanLib may link to may have additional
** requirements or restrictions.
**
** File Author(s):
**
** Magnus Norddahl
** (if your name is missing here, please add it)
*/
#include "Sound/precomp.h"
#include "API/Sound/soundformat.h"
#include <API/Core/System/error.h>
#include "API/Core/System/cl_assert.h"
#include "API/Core/System/system.h"
#include "API/Core/System/log.h"
#include "soundprovider_recorder_oss.h"
#include <unistd.h>
#include <fcntl.h>
#include <sys/ioctl.h>
#ifdef HAVE_MACHINE_SOUNDCARD_H
#include <machine/soundcard.h>
#endif
#ifdef HAVE_SYS_SOUNDCARD_H
#include <sys/soundcard.h>
#endif
#ifdef HAVE_SOUNDCARD_H
#include <soundcard.h>
#endif
#ifdef __CYGWIN__
#include <sys/select.h>
#endif
/////////////////////////////////////////////////////////////////////////////
// CL_SoundProvider_Recorder_OSS_Session construction:
CL_SoundProvider_Recorder_OSS_Session::CL_SoundProvider_Recorder_OSS_Session(int frequency) :
frequency(frequency), position(0)
{
dev_dsp_fd = open(DEFAULT_DSP, O_RDONLY);
if (dev_dsp_fd == -1)
{
frag_size = frequency/2;
return;
// throw CL_Error("Could not open " + DEFAULT_DSP + ". No sound will be available.");
}
#ifndef USE_DRIVER_FRAGSIZE
int frag_settings = 0x0003000b; // 0xMMMMSSSS
// (where MMMM = num fragments, SSSS = fragment size)
if (ioctl(dev_dsp_fd, SNDCTL_DSP_SETFRAGMENT, &frag_settings))
{
CL_Log::log("debug", "ClanSound: Failed to set soundcard fragment size. Sound may have a long latency.");
}
#endif
format = AFMT_S16_NE;
ioctl(dev_dsp_fd, SNDCTL_DSP_SETFMT, &format);
if (format != AFMT_S16_NE)
{
close(dev_dsp_fd);
throw CL_Error("Requires 16 bit soundcard. No sound input will be available.");
}
int stereo = 0;
ioctl(dev_dsp_fd, SNDCTL_DSP_STEREO, &stereo);
if (stereo != 0)
{
close(dev_dsp_fd);
throw CL_Error("ClanSound: Requires 16 bit mono input. No sound will be available.");
}
int speed = frequency;
ioctl(dev_dsp_fd, SNDCTL_DSP_SPEED, &speed);
float percent_wrong = speed / (float) frequency;
if (percent_wrong < 0.90 || percent_wrong > 1.10)
{
close(dev_dsp_fd);
throw CL_Error("ClanSound: Mixing rate is not supported by soundcard.");
}
// Try to improve mixing performance by using the same mixing buffer size
// as the sound device does:
int err = ioctl(dev_dsp_fd, SNDCTL_DSP_GETBLKSIZE, &frag_size);
if (err == -1)
{
CL_Log::log("debug", "ClanSound: Warning, Couldn't get sound device blocksize. Using 0.25 sec mixing buffer.");
frag_size = frequency/4; // 0.25 sec mixing buffer used.
}
}
CL_SoundProvider_Recorder_OSS_Session::~CL_SoundProvider_Recorder_OSS_Session()
{
}
/////////////////////////////////////////////////////////////////////////////
// CL_SoundProvider_Recorder_OSS_Session attributes:
int CL_SoundProvider_Recorder_OSS_Session::get_num_samples() const
{
return 1;
}
int CL_SoundProvider_Recorder_OSS_Session::get_frequency() const
{
return frequency;
}
CL_SoundFormat CL_SoundProvider_Recorder_OSS_Session::get_format() const
{
return (CL_SoundFormat)format;
}
int CL_SoundProvider_Recorder_OSS_Session::get_num_channels() const
{
return 1;
}
int CL_SoundProvider_Recorder_OSS_Session::get_position() const
{
return position;
}
/////////////////////////////////////////////////////////////////////////////
// CL_SoundProvider_Recorder_OSS_Session operations:
bool CL_SoundProvider_Recorder_OSS_Session::eof() const
{
return false;
}
void CL_SoundProvider_Recorder_OSS_Session::stop()
{
}
bool CL_SoundProvider_Recorder_OSS_Session::play()
{
return true;
}
bool CL_SoundProvider_Recorder_OSS_Session::set_position(int pos)
{
position = pos;
return true;
}
int CL_SoundProvider_Recorder_OSS_Session::get_data(void **data_ptr, int data_requested)
{
int len;
audio_buf_info info;
// todo: read samples, and only travel position by amount read.
int err = ioctl(dev_dsp_fd, SNDCTL_DSP_GETISPACE, &info);
if (err == -1)
{
CL_Log::log("debug", "ClanSound: fragments free not supported by device!?");
position = 0;
}
if(info.fragments == 0)
{
return 0;
}
else
{
len = read(dev_dsp_fd, data_ptr[0], data_requested);
}
position += len;
return position;
}
/////////////////////////////////////////////////////////////////////////////
// CL_SoundProvider_Recorder_OSS_Session implementation:
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