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/* audiodevs: Abstraction layer for audio hardware & samples
Copyright (C) 2003-2004 Nemosoft Unv.
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
For questions, remarks, patches, etc. for this program, the author can be
reached at camstream@smcc.demon.nl.
*/
#include "AudioRingBuffer.h"
#include "MemoryAudioSample.h"
CAudioRingBufferReader::CAudioRingBufferReader(CRingBuffer *ring, const SoundAttributes *attr)
: CRingBufferReader(ring)
{
qDebug(">> CAudioRingBufferReader::CAudioRingBufferReader(..)");
m_pRing = ring;
m_pSoundAttributes = attr;
qDebug("<< CAudioRingBufferReader::CAudioRingBufferReader(..)");
}
SoundAttributes CAudioRingBufferReader::GetSoundAttributes() const
{
return *m_pSoundAttributes;
}
void CAudioRingBufferReader::SetLowWaterMark(SamplePos mark)
{
CRingBufferReader::SetLowWaterMark(mark * m_pSoundAttributes->BytesPerSample());
}
SamplePos CAudioRingBufferReader::GetLowWaterMark() const
{
return CRingBufferReader::GetLowWaterMark() / m_pSoundAttributes->BytesPerSample();
}
void CAudioRingBufferReader::SetHighWaterMark(SamplePos mark)
{
CRingBufferReader::SetHighWaterMark(mark * m_pSoundAttributes->BytesPerSample());
}
SamplePos CAudioRingBufferReader::GetHighWaterMark() const
{
return CRingBufferReader::GetHighWaterMark() / m_pSoundAttributes->BytesPerSample();
}
#if 0
CAudioSample CAudioRingBufferReader::ReadFromTail(SamplePos length)
{
}
#endif
CAudioSample CAudioRingBufferReader::ReadFromHead(SamplePos length, bool clear, unsigned long time)
{
CMemoryAudioSample sam(*m_pSoundAttributes, length);
void *p;
int copied, need;
//qDebug(">> CAudioRingBufferReader::ReadFromHead");
p = sam.GetRawPointer();
if (p != 0)
{
need = length * m_pSoundAttributes->BytesPerSample();
copied = ReadFromBufferHead(p, need, clear, time);
if (copied < need)
return CAudioSample(); // return empty sample
}
//qDebug("<< CAudioRingBufferReader::ReadFromHead");
return sam;
}
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