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// ------------------------------------------------------------------------
// audioio-buffered.cpp: A lower level interface for audio I/O objects
// Copyright (C) 1999-2002,2008,2009 Kai Vehmanen
//
// 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
// ------------------------------------------------------------------------
#include <cmath> /* ceil() */
#include <kvu_dbc.h>
#include "eca-logger.h"
#include "samplebuffer.h"
#include "audioio-buffered.h"
AUDIO_IO_BUFFERED::AUDIO_IO_BUFFERED(void)
: buffersize_rep(0),
iobuf_uchar_repp(0),
iobuf_size_rep(0)
{
}
AUDIO_IO_BUFFERED::~AUDIO_IO_BUFFERED(void)
{
if (iobuf_uchar_repp != 0) {
delete[] iobuf_uchar_repp;
iobuf_uchar_repp = 0;
iobuf_size_rep = 0;
}
}
void AUDIO_IO_BUFFERED::reserve_buffer_space(long int bytes)
{
if (bytes > static_cast<long int>(iobuf_size_rep)) {
if (iobuf_uchar_repp != 0) {
delete[] iobuf_uchar_repp;
iobuf_uchar_repp = 0;
}
// remember to include <iostream>
// std::cerr << "Reserving " << bytes << " bytes (" << label() << ").\n";
iobuf_uchar_repp = new unsigned char [bytes];
iobuf_size_rep = bytes;
}
}
void AUDIO_IO_BUFFERED::set_buffersize(long int samples)
{
if (buffersize_rep != samples ||
static_cast<long int>(iobuf_size_rep) < buffersize_rep * frame_size()) {
buffersize_rep = samples;
reserve_buffer_space(buffersize_rep * frame_size());
}
}
void AUDIO_IO_BUFFERED::read_buffer(SAMPLE_BUFFER* sbuf)
{
// --------
DBC_REQUIRE(iobuf_uchar_repp != 0);
DBC_REQUIRE(static_cast<long int>(iobuf_size_rep) >= buffersize_rep * frame_size());
// --------
if (interleaved_channels() == true) {
sbuf->import_interleaved(iobuf_uchar_repp,
read_samples(iobuf_uchar_repp, buffersize_rep),
sample_format(),
channels());
}
else {
sbuf->import_noninterleaved(iobuf_uchar_repp,
read_samples(iobuf_uchar_repp, buffersize_rep),
sample_format(),
channels());
}
if (sbuf->length_in_samples() < buffersize_rep) {
ECA_LOG_MSG(ECA_LOGGER::user_objects, "end-of-stream tag detected for '"
+ description() + "'");
sbuf->event_tag_set(SAMPLE_BUFFER::tag_end_of_stream);
}
change_position_in_samples(sbuf->length_in_samples());
// --------
DBC_ENSURE(sbuf->number_of_channels() == channels());
// --------
}
void AUDIO_IO_BUFFERED::write_buffer(SAMPLE_BUFFER* sbuf)
{
// --------
DBC_REQUIRE(iobuf_uchar_repp != 0);
DBC_REQUIRE(static_cast<long int>(iobuf_size_rep) >= buffersize_rep * frame_size());
// --------
set_buffersize(sbuf->length_in_samples());
if (interleaved_channels() == true) {
sbuf->export_interleaved(iobuf_uchar_repp,
sample_format(),
channels());
}
else {
sbuf->export_noninterleaved(iobuf_uchar_repp,
sample_format(),
channels());
}
write_samples(iobuf_uchar_repp, sbuf->length_in_samples());
change_position_in_samples(sbuf->length_in_samples());
extend_position();
}
void AUDIO_IO_BUFFERED::set_channels(SAMPLE_SPECS::channel_t v)
{
AUDIO_IO::set_channels(v);
/* adjust allocated buffers if audio format has changed */
set_buffersize(buffersize_rep);
}
void AUDIO_IO_BUFFERED::set_sample_format(Sample_format v) throw(ECA_ERROR&)
{
AUDIO_IO::set_sample_format(v);
/* adjust allocated buffers if audio format has changed */
set_buffersize(buffersize_rep);
}
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