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Diffstat (limited to 'src/source.cc')
-rw-r--r-- | src/source.cc | 81 |
1 files changed, 81 insertions, 0 deletions
diff --git a/src/source.cc b/src/source.cc new file mode 100644 index 0000000..187a28e --- /dev/null +++ b/src/source.cc @@ -0,0 +1,81 @@ +/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ +/* vim: set et sw=2 ts=2: */ +/*************************************************************************** + * source.cc + * + * Thu Sep 25 10:35:39 CEST 2014 + * Copyright 2014 Bent Bisballe Nyeng + * deva@aasimon.org + ****************************************************************************/ + +/* + * This file is part of LibAudioIO. + * + * LibAudioIO is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; either + * version 2.1 of the License, or (at your option) any later version. + * + * LibAudioIO 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 + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with LibAudioIO; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA + */ +#include "source.h" + +Source::Source(snd_pcm_t *handle, unsigned int _samplerate, + unsigned int _channels, snd_pcm_uframes_t _frames) +{ + this->handle = handle; + this->_samplerate = _samplerate; + this->_channels = _channels; + this->_frames = _frames; +} + +Source::~Source() +{ + snd_pcm_drain(handle); + snd_pcm_close(handle); +} + +int Source::readSamples(char *pcm, size_t maxsize) +{ + int rc; + + /* + if(size < frames * sizeof(short) * channels) { + throw PcmBufferTooSmall(); + } + */ + + rc = snd_pcm_readi(handle, pcm, maxsize / sizeof(short)); + if(rc == -EPIPE) { + // EPIPE means overrun + snd_pcm_prepare(handle); + return -2; + } else if (rc < 0) { + return -1; // Read Error + } + + return rc * sizeof(short) /* * channels */; +} + +unsigned int Source::samplerate() +{ + return this->_samplerate; +} + +unsigned int Source::channels() +{ + return this->_channels; +} + +snd_pcm_uframes_t Source::frames() +{ + return this->_frames; +} + |