mirror of https://github.com/pyrollo/vinace.git
88 lines
2.8 KiB
C++
88 lines
2.8 KiB
C++
/* -*- Mode: C; indent-tabs-mode: t; c-basic-offset: 4; tab-width: 4 -*- */
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/*
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* apple
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* Copyright (C) 2009 <>
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*
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* apple is free software: you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* apple 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.
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* See the 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 along
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* with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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// http://www.4front-tech.com/pguide/audio.html
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#include "c-pulse-audio-sound.hpp"
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#include <iostream>
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//#include <unistd.h>
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//#include <fcntl.h>
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#define SOUND_PERIOD_USEC 20000
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// 20kHz sound frequency
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#define SOUND_FREQUENCY 20000
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// Delay starting sound of one period
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#define SAMPLES_SHIFT (SOUND_FREQUENCY*SOUND_PERIOD_USEC/1000000)
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CPulseAudioSound::CPulseAudioSound(CSpeaker *speaker):CSound(speaker) {
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pa_sample_spec ss;
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ss.format = PA_SAMPLE_U8;
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ss.channels = 1;
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ss.rate = SOUND_FREQUENCY;
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pulse = pa_simple_new(NULL, // Use the default server.
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"Vinace", // Our application's name.
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PA_STREAM_PLAYBACK, // PA_STREAM_UPLOAD
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NULL, // Use the default device.
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"Apple speaker sound", // Description of our stream.
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&ss, // Our sample format.
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NULL, // Use default channel map
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NULL, // Use default buffering attributes.
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NULL // Ignore error code.
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);
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if (pulse)
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printf("CPulseAudioSound : Sound ready!\n");
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else
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printf("CPulseAudioSound : Unable to connect to PulseAudio -> No Sound.\n");
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// Send some data to Pulse Audio to be sure not to run out of buffer later.
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// send_dummy(SAMPLES_SHIFT);
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lastpos = speaker->get_pos();
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}
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void CPulseAudioSound::send_dummy(int samples) {
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static int error;
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unsigned char *dummy = new unsigned char[samples];
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for (int index=0; index < samples; index++)
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dummy[index]=0;
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if (pulse)
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pa_simple_write(pulse, dummy, samples, &error);
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delete dummy;
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}
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void CPulseAudioSound::send_sound() {
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static int error;
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int newpos = speaker->get_pos();
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if (pulse)
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if (newpos < lastpos) {
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pa_simple_write(pulse, speaker->get_buffer()+lastpos, speaker->get_max_pos()-lastpos, &error);
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lastpos = 0;
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}
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if (newpos > lastpos) {
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pa_simple_write(pulse, speaker->get_buffer()+lastpos, newpos-lastpos, &error);
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lastpos = newpos;
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}
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}
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