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135 lines
3.6 KiB
135 lines
3.6 KiB
/*
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* Copyright (C) 2006 iptelorg 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. This program is released under
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* the GPL with the additional exemption that compiling, linking,
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* and/or using OpenSSL is allowed.
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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 AmPlaylist.h */
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#ifndef AmPlaylist_h
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#define AmPlaylist_h
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#include "AmAudio.h"
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#include "AmThread.h"
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#include "AmEventQueue.h"
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#include <deque>
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using std::deque;
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/** \brief entry in an \ref AmPlaylist */
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struct AmPlaylistItem
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{
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AmAudio* play;
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AmAudio* record;
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AmPlaylistItem(AmAudio* play,
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AmAudio* record)
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: play(play), record(record) {}
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virtual ~AmPlaylistItem() { }
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};
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/**
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* \brief AmAudio component that plays entries serially
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*
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* This class can be plugged to the Input or Output of a
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* session. Entries can be added or removed from the playlist,
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* and the current entry is played until it is finished,
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* then the next entry is played.
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*/
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class AmPlaylist: public AmAudio
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{
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AmMutex items_mut;
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deque<AmPlaylistItem*> items;
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AmMutex cur_mut;
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AmPlaylistItem* cur_item;
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AmEventQueue* ev_q;
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void updateCurrentItem();
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void gotoNextItem(bool notify = true);
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protected:
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// Fake implement AmAudio's pure virtual methods
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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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public:
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AmPlaylist(AmEventQueue* q);
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~AmPlaylist();
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bool isEmpty();
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void addToPlaylist(AmPlaylistItem* item);
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void addToPlayListFront(AmPlaylistItem* item);
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void close(bool notify = true);
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};
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/**
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* \brief event fired by the AmPlaylistSeparator
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*/
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class AmPlaylistSeparatorEvent :
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public AmEvent {
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public:
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AmPlaylistSeparatorEvent(int id)
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: AmEvent(id) { }
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};
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/**
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* \brief playlistelement to notify session about the playlist progress
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*
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* null-playlist element which notifies session that this position in
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* playlist is reached. It fies a AmPlaylistSeparatorEvent if it is
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* read or written.
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*/
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class AmPlaylistSeparator
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: public AmAudio {
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bool notified;
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AmEventQueue* ev_q;
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int id;
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public:
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AmPlaylistSeparator(AmEventQueue* q, int id)
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: ev_q(q), notified(false), id(id) { }
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~AmPlaylistSeparator() { }
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int read(unsigned int user_ts, unsigned int size){
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if (!notified)
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ev_q->postEvent(new AmPlaylistSeparatorEvent(id));
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notified = true;
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return 0;
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}
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int write(unsigned int user_ts, unsigned int size){
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return read(user_ts, size);
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}
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};
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#endif
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