James Turner
983e1abf48
Restructure SGSampleGroup, to make #ifdef-ing the OpenAL calls easier. No functionality change.
127 lines
3.2 KiB
C++
127 lines
3.2 KiB
C++
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// queue.cxx -- Audio sample encapsulation class
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//
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// Written by Curtis Olson, started April 2004.
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// Modified to match the new SoundSystem by Erik Hofman, October 2009
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//
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// Copyright (C) 2004 Curtis L. Olson - http://www.flightgear.org/~curt
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// Copyright (C) 2009 Erik Hofman <erik@ehofman.com>
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//
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// This program is free software; you can redistribute it and/or
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// modify it under the terms of the GNU General Public License as
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// published by the Free Software Foundation; either version 2 of the
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// License, or (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, but
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// WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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// 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 Foundation,
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// Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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//
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// $Id$
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#ifdef HAVE_CONFIG_H
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# include <simgear_config.h>
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#endif
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#include <cstdlib> // rand()
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#include <cstring>
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#include <simgear/debug/logstream.hxx>
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#include <simgear/structure/exception.hxx>
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#include <simgear/misc/sg_path.hxx>
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#include "soundmgr_openal.hxx"
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#include "sample_queue.hxx"
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#include "soundmgr_openal_private.hxx"
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using std::string;
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//
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// SGSampleQueue
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//
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// empty constructor
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SGSampleQueue::SGSampleQueue( int freq, int format ) :
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_refname(random_string()),
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_playing(false)
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{
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_freq = freq;
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_format = format;
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_buffers.clear();
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}
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SGSampleQueue::~SGSampleQueue() {
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stop();
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}
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void SGSampleQueue::stop()
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{
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#ifdef ENABLE_SOUND
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ALint num;
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alGetSourcei(_source, AL_BUFFERS_PROCESSED, &num);
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for (int i=0; i<num; i++) {
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ALuint buffer;
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alSourceUnqueueBuffers(_source, 1, &buffer);
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alDeleteBuffers(1, &buffer);
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}
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_buffers.clear();
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#endif
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_playing = false;
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_changed = true;
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}
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void SGSampleQueue::add( const void* smp_data, size_t len )
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{
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#ifdef ENABLE_SOUND
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const ALvoid *data = (const ALvoid *)smp_data;
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ALuint buffer;
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ALint num;
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if ( _valid_source )
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{
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alGetSourcei(_source, AL_BUFFERS_PROCESSED, &num);
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if (num > 1) {
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alSourceUnqueueBuffers(_source, 1, &buffer);
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} else {
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alGenBuffers(1, &buffer);
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}
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alBufferData(buffer, _format, data, len, _freq);
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}
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else
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{
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alGenBuffers(1, &buffer);
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alBufferData(buffer, _format, data, len, _freq);
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_buffers.push_back(buffer);
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}
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#endif
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}
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void SGSampleQueue::set_source( unsigned int sid )
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{
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SGSoundSample::set_source(sid);
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#ifdef ENABLE_SOUND
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ALuint num = _buffers.size();
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for (unsigned int i=0; i < num; i++)
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{
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ALuint buffer = _buffers[i];
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alSourceQueueBuffers(_source, 1, &buffer);
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}
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_buffers.clear();
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#endif
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}
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string SGSampleQueue::random_string() {
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static const char *r = "0123456789abcdefghijklmnopqrstuvwxyz"
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"ABCDEFGHIJKLMNOPQRSTUVWXYZ";
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string rstr = "Queued sample: ";
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for (int i=0; i<10; i++) {
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rstr.push_back( r[rand() % strlen(r)] );
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}
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return rstr;
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}
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