137 lines
4.0 KiB
C++
137 lines
4.0 KiB
C++
// ------------------------------------------------------------------------
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// audioio-buffered.cpp: A lower level interface for audio I/O objects
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// Copyright (C) 1999-2002,2008,2009 Kai Vehmanen
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//
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// This program is free software; you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation; either version 2 of the License, or
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// (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with this program; if not, write to the Free Software
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// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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// ------------------------------------------------------------------------
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#include <cmath> /* ceil() */
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#include <kvu_dbc.h>
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#include "eca-logger.h"
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#include "samplebuffer.h"
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#include "audioio-buffered.h"
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AUDIO_IO_BUFFERED::AUDIO_IO_BUFFERED(void)
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: buffersize_rep(0),
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iobuf_uchar_repp(0),
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iobuf_size_rep(0)
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{
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}
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AUDIO_IO_BUFFERED::~AUDIO_IO_BUFFERED(void)
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{
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if (iobuf_uchar_repp != 0) {
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delete[] iobuf_uchar_repp;
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iobuf_uchar_repp = 0;
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iobuf_size_rep = 0;
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}
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}
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void AUDIO_IO_BUFFERED::reserve_buffer_space(long int bytes)
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{
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if (bytes > static_cast<long int>(iobuf_size_rep)) {
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if (iobuf_uchar_repp != 0) {
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delete[] iobuf_uchar_repp;
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iobuf_uchar_repp = 0;
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}
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// remember to include <iostream>
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// std::cerr << "Reserving " << bytes << " bytes (" << label() << ").\n";
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iobuf_uchar_repp = new unsigned char [bytes];
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iobuf_size_rep = bytes;
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}
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}
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void AUDIO_IO_BUFFERED::set_buffersize(long int samples)
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{
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if (buffersize_rep != samples ||
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static_cast<long int>(iobuf_size_rep) < buffersize_rep * frame_size()) {
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buffersize_rep = samples;
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reserve_buffer_space(buffersize_rep * frame_size());
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}
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}
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void AUDIO_IO_BUFFERED::read_buffer(SAMPLE_BUFFER* sbuf)
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{
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// --------
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DBC_REQUIRE(iobuf_uchar_repp != 0);
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DBC_REQUIRE(static_cast<long int>(iobuf_size_rep) >= buffersize_rep * frame_size());
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// --------
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if (interleaved_channels() == true) {
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sbuf->import_interleaved(iobuf_uchar_repp,
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read_samples(iobuf_uchar_repp, buffersize_rep),
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sample_format(),
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channels());
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}
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else {
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sbuf->import_noninterleaved(iobuf_uchar_repp,
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read_samples(iobuf_uchar_repp, buffersize_rep),
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sample_format(),
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channels());
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}
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if (sbuf->length_in_samples() < buffersize_rep) {
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ECA_LOG_MSG(ECA_LOGGER::user_objects, "end-of-stream tag detected for '"
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+ description() + "'");
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sbuf->event_tag_set(SAMPLE_BUFFER::tag_end_of_stream);
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}
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change_position_in_samples(sbuf->length_in_samples());
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// --------
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DBC_ENSURE(sbuf->number_of_channels() == channels());
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// --------
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}
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void AUDIO_IO_BUFFERED::write_buffer(SAMPLE_BUFFER* sbuf)
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{
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// --------
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DBC_REQUIRE(iobuf_uchar_repp != 0);
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DBC_REQUIRE(static_cast<long int>(iobuf_size_rep) >= buffersize_rep * frame_size());
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// --------
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set_buffersize(sbuf->length_in_samples());
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if (interleaved_channels() == true) {
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sbuf->export_interleaved(iobuf_uchar_repp,
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sample_format(),
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channels());
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}
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else {
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sbuf->export_noninterleaved(iobuf_uchar_repp,
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sample_format(),
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channels());
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}
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write_samples(iobuf_uchar_repp, sbuf->length_in_samples());
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change_position_in_samples(sbuf->length_in_samples());
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extend_position();
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}
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void AUDIO_IO_BUFFERED::set_channels(SAMPLE_SPECS::channel_t v)
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{
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AUDIO_IO::set_channels(v);
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/* adjust allocated buffers if audio format has changed */
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set_buffersize(buffersize_rep);
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}
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void AUDIO_IO_BUFFERED::set_sample_format(Sample_format v) throw(ECA_ERROR&)
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{
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AUDIO_IO::set_sample_format(v);
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/* adjust allocated buffers if audio format has changed */
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set_buffersize(buffersize_rep);
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}
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