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96 lines
3.2 KiB
96 lines
3.2 KiB
/*
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* libjingle
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* Copyright 2004--2005, Google Inc.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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* 3. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
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* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
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* EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
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* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
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* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
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* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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// MediaEngine is an abstraction of a media engine which can be subclassed
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// to support different media componentry backends.
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#ifndef TALK_SESSION_PHONE_MEDIAENGINE_H_
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#define TALK_SESSION_PHONE_MEDIAENGINE_H_
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#include <string>
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#include <vector>
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#include "mediachannel.h"
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namespace cricket {
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class MediaEngine {
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public:
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struct Codec {
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int id;
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std::string name;
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int preference;
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// Creates a codec with the given parameters.
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Codec(int pt, const std::string& nm, int pr) : id(pt), name(nm), preference(pr) {}
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// Ranks codecs by their preferences.
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bool operator <(const Codec& c) const { return preference > c.preference; }
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};
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// Bitmask flags for options that may be supported by the media engine implementation
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enum MediaEngineOptions {
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AUTO_GAIN_CONTROL = 1 << 1,
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};
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MediaEngine() {}
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// Initialize
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virtual bool Init() = 0;
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virtual void Terminate() = 0;
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virtual MediaChannel *CreateChannel() = 0;
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virtual int SetAudioOptions(int options) = 0;
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virtual int SetSoundDevices(int wave_in_device, int wave_out_device) = 0;
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virtual int GetInputLevel() = 0;
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std::vector<Codec> &codecs() { return codecs_; }
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bool FindCodec(const char* codec) {
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for (std::vector<Codec>::iterator i = codecs_.begin(); i < codecs_.end(); i++) {
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if ((*i).name == codec)
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return true;
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}
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return false;
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}
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bool GetCodecPreference (const char *codec, int & preference) {
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for (std::vector<Codec>::iterator i = codecs_.begin(); i < codecs_.end(); i++) {
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if ((*i).name == codec) {
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preference = (*i).preference;
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return true;
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}
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}
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return false;
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}
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protected:
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std::vector<Codec> codecs_;
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};
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} // namespace cricket
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#endif // TALK_SESSION_PHONE_MEDIAENGINE_H_
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