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81 lines
2.4 KiB
81 lines
2.4 KiB
/*
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* $Id$
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*
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* Copyright (C) 2007 iptego GmbH
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*
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* This file is part of sems, a free SIP media server.
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*
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* sems 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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* For a license to use the sems software under conditions
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* other than those described here, or to purchase support for this
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* software, please contact iptel.org by e-mail at the following addresses:
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* info@iptel.org
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*
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* sems 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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/** @file AmAudioMixIn.h */
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#ifndef _AM_AUDIO_MIX_IN_H
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#define _AM_AUDIO_MIX_IN_H
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#include "AmAudio.h"
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#include "AmAudioFile.h"
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#define MAX_PACKETLENGTH_MS 30
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#define MAX_BUF_SAMPLES SYSTEM_SAMPLERATE * MAX_PACKETLENGTH_MS / 1000
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#define DEFAULT_SAMPLE_RATE SYSTEM_SAMPLERATE // eh...
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/**
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* \brief \ref AmAudio to mix in every n seconds a file
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*
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* AmAudio that plays Audio A and
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* every s seconds mixes in AudioFile B with level l.
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* If l == 0, playback of A is not continued when playing B,
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* which means that it continues right where it was before
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* playback of B started.
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*
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*/
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class AmAudioMixIn : public AmAudio {
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AmAudio* A;
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AmAudioFile* B;
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unsigned int s;
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double l;
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bool finish_b_while_mixing;
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bool mixing;
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unsigned int next_start_ts;
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bool next_start_ts_i;
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short mix_buf[MAX_BUF_SAMPLES]; // 240
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public:
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AmAudioMixIn(AmAudio* A, AmAudioFile* B,
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unsigned int s, double l,
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bool finish_b_while_mixing = false);
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~AmAudioMixIn();
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protected:
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// not used
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int read(unsigned int user_ts, unsigned int size){ return -1; }
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int write(unsigned int user_ts, unsigned int size){ return -1; }
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// override AmAudio
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int get(unsigned int user_ts, unsigned char* buffer, unsigned int nb_samples);
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int put(unsigned int user_ts, unsigned char* buffer, unsigned int size);
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};
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#endif // _AM_AUDIO_MIX_IN_H
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