1 //------------------------------------------------------------------------------ 2 // Copyright (c) 2001-2002, OpenBeOS 3 // 4 // Permission is hereby granted, free of charge, to any person obtaining a 5 // copy of this software and associated documentation files (the "Software"), 6 // to deal in the Software without restriction, including without limitation 7 // the rights to use, copy, modify, merge, publish, distribute, sublicense, 8 // and/or sell copies of the Software, and to permit persons to whom the 9 // Software is furnished to do so, subject to the following conditions: 10 // 11 // The above copyright notice and this permission notice shall be included in 12 // all copies or substantial portions of the Software. 13 // 14 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 15 // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 16 // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE 17 // AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 18 // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING 19 // FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER 20 // DEALINGS IN THE SOFTWARE. 21 // 22 // File Name: GameProducer.cpp 23 // Author: Christopher ML Zumwalt May (zummy@users.sf.net) 24 // Description: A MediaKit producer node which mixes sound from the GameKit 25 // and sends them to the audio mixer 26 //------------------------------------------------------------------------------ 27 #ifndef _GAME_PRODUCER_H 28 #define _GAME_PRODUCER_H 29 30 31 #include <media/BufferProducer.h> 32 #include <media/MediaEventLooper.h> 33 #include <GameSoundDefs.h> 34 35 36 class GameSoundBuffer; 37 38 39 class GameProducer : public BBufferProducer, public BMediaEventLooper { 40 public: 41 GameProducer(GameSoundBuffer* object, 42 const gs_audio_format * format); 43 ~GameProducer(); 44 45 // BMediaNode methods 46 BMediaAddOn* AddOn(int32* internal_id) const; 47 48 // BBufferProducer methods 49 status_t FormatSuggestionRequested(media_type type, 50 int32 quality, media_format* format); 51 52 status_t FormatProposal(const media_source& output, 53 media_format* format); 54 55 status_t FormatChangeRequested(const media_source& source, 56 const media_destination& destination, 57 media_format* io_format, 58 int32* _deprecated_); 59 60 status_t GetNextOutput(int32* cookie, 61 media_output* _output); 62 63 status_t DisposeOutputCookie(int32 cookie); 64 65 status_t SetBufferGroup(const media_source& forSource, 66 BBufferGroup* group); 67 68 69 status_t GetLatency(bigtime_t* _latency); 70 71 status_t PrepareToConnect(const media_source& what, 72 const media_destination& where, 73 media_format* format, 74 media_source* _source, 75 char* out_name); 76 77 void Connect(status_t error, 78 const media_source& source, 79 const media_destination& destination, 80 const media_format& format, 81 char* ioName); 82 83 void Disconnect(const media_source& what, 84 const media_destination& where); 85 86 void LateNoticeReceived(const media_source& what, 87 bigtime_t howMuch, 88 bigtime_t performanceDuration); 89 90 void EnableOutput(const media_source & what, 91 bool enabled, int32* _deprecated_); 92 93 status_t SetPlayRate(int32 numerator, int32 denominator); 94 95 status_t HandleMessage(int32 message, const void* data, 96 size_t size); 97 98 void AdditionalBufferRequested(const media_source& source, 99 media_buffer_id prev_buffer, 100 bigtime_t prev_time, 101 const media_seek_tag* prev_tag); 102 103 void LatencyChanged(const media_source& source, 104 const media_destination& destination, 105 bigtime_t new_latency, 106 uint32 flags); 107 108 // BMediaEventLooper methods 109 void NodeRegistered(); 110 void SetRunMode(run_mode mode); 111 void HandleEvent(const media_timed_event* event, 112 bigtime_t lateness, 113 bool realTimeEvent = false); 114 115 // GameProducer 116 status_t StartPlaying(GameSoundBuffer* sound); 117 status_t StopPlaying(GameSoundBuffer* sound); 118 bool IsPlaying(GameSoundBuffer* sound) const; 119 120 int32 SoundCount() const; 121 122 private: 123 BBuffer* FillNextBuffer(bigtime_t event_time); 124 125 BBufferGroup* fBufferGroup; 126 bigtime_t fLatency; 127 bigtime_t fInternalLatency; 128 media_output fOutput; 129 bool fOutputEnabled; 130 media_format fPreferredFormat; 131 132 bigtime_t fStartTime; 133 size_t fFrameSize; 134 int64 fFramesSent; 135 GameSoundBuffer* fObject; 136 size_t fBufferSize; 137 }; 138 139 140 #endif // _GAME_PRODUCER_H 141