1 /*
2  * $Id: PlaybackNode.h,v 1.1.1.1 2002/01/22 00:52:08 phil Exp $
3  * PortAudio Portable Real-Time Audio Library
4  * Latest Version at: http://www.portaudio.com
5  * BeOS Media Kit Implementation by Joshua Haberman
6  *
7  * Copyright (c) 2001 Joshua Haberman <joshua@haberman.com>
8  *
9  * Permission is hereby granted, free of charge, to any person obtaining
10  * a copy of this software and associated documentation files
11  * (the "Software"), to deal in the Software without restriction,
12  * including without limitation the rights to use, copy, modify, merge,
13  * publish, distribute, sublicense, and/or sell copies of the Software,
14  * and to permit persons to whom the Software is furnished to do so,
15  * subject to the following conditions:
16  *
17  * The above copyright notice and this permission notice shall be
18  * included in all copies or substantial portions of the Software.
19  *
20  * Any person wishing to distribute modifications to the Software is
21  * requested to send the modifications to the original developer so that
22  * they can be incorporated into the canonical version.
23  *
24  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
25  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
26  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
27  * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR
28  * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF
29  * CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
30  * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
31  *
32  */
33 
34 #include <be/media/MediaRoster.h>
35 #include <be/media/MediaEventLooper.h>
36 #include <be/media/BufferProducer.h>
37 
38 #include "portaudio.h"
39 
40 class PaPlaybackNode :
41             public BBufferProducer,
42             public BMediaEventLooper
43 {
44 
45 public:
46     PaPlaybackNode( uint32 channels, float frame_rate, uint32 frames_per_buffer,
47                     PortAudioCallback *callback, void *user_data );
48     ~PaPlaybackNode();
49 
50 
51     /* Local methods ******************************************/
52 
53     BBuffer *FillNextBuffer(bigtime_t time);
54     void SetSampleFormat(PaSampleFormat inFormat, PaSampleFormat outFormat);
55     bool IsRunning();
56     PaTimestamp GetStreamTime();
57 
58     /* BMediaNode methods *************************************/
59 
60     BMediaAddOn* AddOn( int32 * ) const;
61     status_t HandleMessage( int32 message, const void *data, size_t size );
62 
63     /* BMediaEventLooper methods ******************************/
64 
65     void HandleEvent( const media_timed_event *event, bigtime_t lateness,
66                       bool realTimeEvent );
67     void NodeRegistered();
68 
69     /* BBufferProducer methods ********************************/
70 
71     status_t FormatSuggestionRequested( media_type type, int32 quality,
72                                         media_format* format );
73     status_t FormatProposal( const media_source& output, media_format* format );
74     status_t FormatChangeRequested( const media_source& source,
75                                     const media_destination& destination, media_format* io_format, int32* );
76 
77     status_t GetNextOutput( int32* cookie, media_output* out_output );
78     status_t DisposeOutputCookie( int32 cookie );
79 
80     void LateNoticeReceived( const media_source& what, bigtime_t how_much,
81                              bigtime_t performance_time );
82     void EnableOutput( const media_source& what, bool enabled, int32* _deprecated_ );
83 
84     status_t PrepareToConnect( const media_source& what,
85                                const media_destination& where, media_format* format,
86                                media_source* out_source, char* out_name );
87     void Connect(status_t error, const media_source& source,
88                  const media_destination& destination, const media_format& format,
89                  char* io_name);
90     void Disconnect(const media_source& what, const media_destination& where);
91 
92     status_t SetBufferGroup(const media_source& for_source, BBufferGroup* newGroup);
93 
94     bool         mAborted;
95 
96 private:
97     media_output mOutput;
98     media_format mPreferredFormat;
99     uint32       mOutputSampleWidth, mFramesPerBuffer;
100     BBufferGroup *mBufferGroup;
101     bigtime_t    mDownstreamLatency, mInternalLatency, mStartTime;
102     uint64       mSamplesSent;
103     PortAudioCallback *mCallback;
104     void         *mUserData;
105     bool         mRunning;
106 
107 };
108 
109