/* * $Id: PlaybackNode.h,v 1.1.1.1 2003-05-09 16:03:53 ggeiger Exp $ * PortAudio Portable Real-Time Audio Library * Latest Version at: http://www.portaudio.com * BeOS Media Kit Implementation by Joshua Haberman * * Copyright (c) 2001 Joshua Haberman * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files * (the "Software"), to deal in the Software without restriction, * including without limitation the rights to use, copy, modify, merge, * publish, distribute, sublicense, and/or sell copies of the Software, * and to permit persons to whom the Software is furnished to do so, * subject to the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * Any person wishing to distribute modifications to the Software is * requested to send the modifications to the original developer so that * they can be incorporated into the canonical version. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF * CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. * */ #include #include #include #include "portaudio.h" class PaPlaybackNode : public BBufferProducer, public BMediaEventLooper { public: PaPlaybackNode( uint32 channels, float frame_rate, uint32 frames_per_buffer, PortAudioCallback *callback, void *user_data ); ~PaPlaybackNode(); /* Local methods ******************************************/ BBuffer *FillNextBuffer(bigtime_t time); void SetSampleFormat(PaSampleFormat inFormat, PaSampleFormat outFormat); bool IsRunning(); PaTimestamp GetStreamTime(); /* BMediaNode methods *************************************/ BMediaAddOn* AddOn( int32 * ) const; status_t HandleMessage( int32 message, const void *data, size_t size ); /* BMediaEventLooper methods ******************************/ void HandleEvent( const media_timed_event *event, bigtime_t lateness, bool realTimeEvent ); void NodeRegistered(); /* BBufferProducer methods ********************************/ status_t FormatSuggestionRequested( media_type type, int32 quality, media_format* format ); status_t FormatProposal( const media_source& output, media_format* format ); status_t FormatChangeRequested( const media_source& source, const media_destination& destination, media_format* io_format, int32* ); status_t GetNextOutput( int32* cookie, media_output* out_output ); status_t DisposeOutputCookie( int32 cookie ); void LateNoticeReceived( const media_source& what, bigtime_t how_much, bigtime_t performance_time ); void EnableOutput( const media_source& what, bool enabled, int32* _deprecated_ ); status_t PrepareToConnect( const media_source& what, const media_destination& where, media_format* format, media_source* out_source, char* out_name ); void Connect(status_t error, const media_source& source, const media_destination& destination, const media_format& format, char* io_name); void Disconnect(const media_source& what, const media_destination& where); status_t SetBufferGroup(const media_source& for_source, BBufferGroup* newGroup); bool mAborted; private: media_output mOutput; media_format mPreferredFormat; uint32 mOutputSampleWidth, mFramesPerBuffer; BBufferGroup *mBufferGroup; bigtime_t mDownstreamLatency, mInternalLatency, mStartTime; uint64 mSamplesSent; PortAudioCallback *mCallback; void *mUserData; bool mRunning; };