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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 "soundoutput_oss.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 <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_SoundOutput_OSS construction:
CL_SoundOutput_OSS::CL_SoundOutput_OSS(int mixing_frequency) :
CL_SoundOutput_Generic(mixing_frequency), dev_dsp_fd(-1), frag_size(0)
{
dev_dsp_fd = open(DEFAULT_DSP, O_WRONLY|O_NONBLOCK);
if (dev_dsp_fd == -1)
{
has_sound = false;
frag_size = mixing_frequency/2;
return;
// throw CL_Error("Could not open " + DEFAULT_DSP + ". No sound will be available.");
}
fcntl(dev_dsp_fd, F_SETFL, fcntl(dev_dsp_fd, F_GETFL) &~ O_NONBLOCK);
#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
int 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 will be available.");
}
int stereo = 1;
ioctl(dev_dsp_fd, SNDCTL_DSP_STEREO, &stereo);
if (stereo != 1)
{
close(dev_dsp_fd);
throw CL_Error("ClanSound: Requires 16 bit stereo capable soundcard. No sound will be available.");
}
int speed = mixing_frequency;
ioctl(dev_dsp_fd, SNDCTL_DSP_SPEED, &speed);
float percent_wrong = speed / (float) mixing_frequency;
if (percent_wrong < 0.90 || percent_wrong > 1.10)
{
close(dev_dsp_fd);
throw CL_Error("ClanSound: Mixing rate (22.05 kHz) 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 = mixing_frequency/2; // 0.25 sec mixing buffer used.
}
audio_buf_info info;
ioctl(dev_dsp_fd, SNDCTL_DSP_GETOSPACE, &info);
start_mixer_thread();
}
CL_SoundOutput_OSS::~CL_SoundOutput_OSS()
{
if (has_sound) stop_mixer_thread();
}
/////////////////////////////////////////////////////////////////////////////
// CL_SoundOutput_OSS attributes:
/////////////////////////////////////////////////////////////////////////////
// CL_SoundOutput_OSS operations:
void CL_SoundOutput_OSS::silence()
{
ioctl(dev_dsp_fd, SNDCTL_DSP_POST, 0);
}
bool CL_SoundOutput_OSS::is_full()
{
if (!has_sound) return false;
audio_buf_info info;
int err = ioctl(dev_dsp_fd, SNDCTL_DSP_GETOSPACE, &info);
if (err == -1)
{
CL_Log::log("debug", "ClanSound: fragments free not supported by device!?");
return false; // not supported by device!?
}
if (info.fragments == 0) return true;
return false;
}
int CL_SoundOutput_OSS::get_fragment_size()
{
return frag_size/4;
}
void CL_SoundOutput_OSS::write_fragment(short *data)
{
write(dev_dsp_fd, data, frag_size);
}
void CL_SoundOutput_OSS::wait()
{
if(!has_sound)
{
CL_System::sleep(100);
return;
}
fd_set wfds;
FD_ZERO(&wfds);
FD_SET(dev_dsp_fd, &wfds);
/*int retval =*/ select(dev_dsp_fd+1, NULL, &wfds, NULL, NULL);
// cl_assert(retval != -1);
}
/////////////////////////////////////////////////////////////////////////////
// CL_SoundOutput_OSS implementation:
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