// -*- c-basic-offset: 4 -*- /* Rosegarden A sequencer and musical notation editor. This program is Copyright 2000-2008 Guillaume Laurent , Chris Cannam , Richard Bown The moral right of the authors to claim authorship of this work has been asserted. This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. See the file COPYING included with this distribution for more information. */ #ifndef _AUDIO_PROCESS_H_ #define _AUDIO_PROCESS_H_ #include "SoundDriver.h" #include "Instrument.h" #include "RealTime.h" #include "RingBuffer.h" #include "RunnablePluginInstance.h" #include "AudioPlayQueue.h" #include "RecordableAudioFile.h" namespace Rosegarden { class AudioThread { public: typedef float sample_t; AudioThread(std::string name, // for diagnostics SoundDriver *driver, unsigned int sampleRate); virtual ~AudioThread(); // This is to be called by the owning class after construction. void run(); // This is to be called by the owning class to cause the thread to // exit and clean up, before destruction. void terminate(); bool running() const { return m_running; } int getLock(); int tryLock(); int releaseLock(); void signal(); protected: virtual void threadRun() = 0; virtual int getPriority() { return 0; } std::string m_name; SoundDriver *m_driver; unsigned int m_sampleRate; pthread_t m_thread; pthread_mutex_t m_lock; pthread_cond_t m_condition; bool m_running; volatile bool m_exiting; private: static void *staticThreadRun(void *arg); static void staticThreadCleanup(void *arg); }; class AudioInstrumentMixer; class AudioBussMixer : public AudioThread { public: AudioBussMixer(SoundDriver *driver, AudioInstrumentMixer *instrumentMixer, unsigned int sampleRate, unsigned int blockSize); virtual ~AudioBussMixer(); void kick(bool wantLock = true, bool signalInstrumentMixer = true); /** * Prebuffer. This should be called only when the transport is * not running. This also calls fillBuffers on the instrument * mixer. */ void fillBuffers(const RealTime ¤tTime); /** * Empty and discard buffer contents. */ void emptyBuffers(); int getBussCount() { return m_bussCount; } /** * A buss is "dormant" if every readable sample on every one of * its buffers is zero. It can therefore be safely skipped during * playback. */ bool isBussDormant(int buss) { return m_bufferMap[buss].dormant; } /** * Busses are currently always stereo. */ RingBuffer *getRingBuffer(int buss, unsigned int channel) { if (channel < m_bufferMap[buss].buffers.size()) { return m_bufferMap[buss].buffers[channel]; } else { return 0; } } /// For call from MappedStudio. Pan is in range -100.0 -> 100.0 void setBussLevels(int buss, float dB, float pan); /// For call regularly from anywhere in a non-RT thread void updateInstrumentConnections(); protected: virtual void threadRun(); void processBlocks(); void generateBuffers(); AudioInstrumentMixer *m_instrumentMixer; unsigned int m_blockSize; int m_bussCount; std::vector m_processBuffers; struct BufferRec { BufferRec() : dormant(true), buffers(), instruments(), gainLeft(0.0), gainRight(0.0) { } ~BufferRec(); bool dormant; std::vector *> buffers; std::vector instruments; // index is instrument id minus base float gainLeft; float gainRight; }; typedef std::map BufferMap; BufferMap m_bufferMap; }; class AudioFileReader; class AudioFileWriter; class AudioInstrumentMixer : public AudioThread { public: typedef std::vector PluginList; typedef std::map PluginMap; typedef std::map SynthPluginMap; AudioInstrumentMixer(SoundDriver *driver, AudioFileReader *fileReader, unsigned int sampleRate, unsigned int blockSize); virtual ~AudioInstrumentMixer(); void kick(bool wantLock = true); void setBussMixer(AudioBussMixer *mixer) { m_bussMixer = mixer; } void setPlugin(InstrumentId id, int position, TQString identifier); void removePlugin(InstrumentId id, int position); void removeAllPlugins(); void setPluginPortValue(InstrumentId id, int position, unsigned int port, float value); float getPluginPortValue(InstrumentId id, int position, unsigned int port); void setPluginBypass(InstrumentId, int position, bool bypass); TQStringList getPluginPrograms(InstrumentId, int); TQString getPluginProgram(InstrumentId, int); TQString getPluginProgram(InstrumentId, int, int, int); unsigned long getPluginProgram(InstrumentId, int, TQString); void setPluginProgram(InstrumentId, int, TQString); TQString configurePlugin(InstrumentId, int, TQString, TQString); void resetAllPlugins(bool discardEvents = false); void discardPluginEvents(); void destroyAllPlugins(); RunnablePluginInstance *getSynthPlugin(InstrumentId id) { return m_synths[id]; } /** * Return the plugins intended for a particular buss. (By coincidence, * this will also work for instruments, but it's not to be relied on.) * It's purely by historical accident that the instrument mixer happens * to hold buss plugins as well -- this could do with being refactored. */ PluginList &getBussPlugins(unsigned int bussId) { return m_plugins[bussId]; } /** * Return the total of the plugin latencies for a given instrument * or buss id. */ size_t getPluginLatency(unsigned int id); /** * Prebuffer. This should be called only when the transport is * not running. */ void fillBuffers(const RealTime ¤tTime); /** * Ensure plugins etc have enough buffers. This is also done by * fillBuffers and only needs to be called here if the extra work * involved in fillBuffers is not desirable. */ void allocateBuffers(); /** * Empty and discard buffer contents. */ void emptyBuffers(RealTime currentTime = RealTime::zeroTime); /** * An instrument is "empty" if it has no audio files, synths or * plugins assigned to it, and so cannot generate sound. Empty * instruments can safely be ignored during playback. */ bool isInstrumentEmpty(InstrumentId id) { return m_bufferMap[id].empty; } /** * An instrument is "dormant" if every readable sample on every * one of its buffers is zero. Dormant instruments can safely be * skipped rather than mixed during playback, but they should not * be ignored (unless also empty). */ bool isInstrumentDormant(InstrumentId id) { return m_bufferMap[id].dormant; } /** * We always have at least two channels (and hence buffers) by * this point, because even on a mono instrument we still have a * Pan setting which will have been applied by the time we get to * these buffers. */ RingBuffer *getRingBuffer(InstrumentId id, unsigned int channel) { if (channel < m_bufferMap[id].buffers.size()) { return m_bufferMap[id].buffers[channel]; } else { return 0; } } /// For call from MappedStudio. Pan is in range -100.0 -> 100.0 void setInstrumentLevels(InstrumentId instrument, float dB, float pan); /// For call regularly from anywhere in a non-RT thread void updateInstrumentMuteStates(); protected: virtual void threadRun(); virtual int getPriority() { return 3; } void processBlocks(bool &readSomething); void processEmptyBlocks(InstrumentId id); bool processBlock(InstrumentId id, PlayableAudioFile **, size_t, bool &readSomething); void generateBuffers(); AudioFileReader *m_fileReader; AudioBussMixer *m_bussMixer; unsigned int m_blockSize; // The plugin data structures will all be pre-sized and so of // fixed size during normal run time; this will allow us to add // and edit plugins without locking. RunnablePluginInstance *getPluginInstance(InstrumentId, int); PluginMap m_plugins; SynthPluginMap m_synths; // maintain the same number of these as the maximum number of // channels on any audio instrument std::vector m_processBuffers; struct BufferRec { BufferRec() : empty(true), dormant(true), zeroFrames(0), filledTo(RealTime::zeroTime), channels(2), buffers(), gainLeft(0.0), gainRight(0.0), volume(0.0), muted(false) { } ~BufferRec(); bool empty; bool dormant; size_t zeroFrames; RealTime filledTo; size_t channels; std::vector *> buffers; float gainLeft; float gainRight; float volume; bool muted; }; typedef std::map BufferMap; BufferMap m_bufferMap; }; class AudioFileReader : public AudioThread { public: AudioFileReader(SoundDriver *driver, unsigned int sampleRate); virtual ~AudioFileReader(); bool kick(bool wantLock = true); /** * Prebuffer. This should be called only when the transport is * not running. */ void fillBuffers(const RealTime ¤tTime); protected: virtual void threadRun(); }; class AudioFileWriter : public AudioThread { public: AudioFileWriter(SoundDriver *driver, unsigned int sampleRate); virtual ~AudioFileWriter(); void kick(bool wantLock = true); bool openRecordFile(InstrumentId id, const std::string &fileName); bool closeRecordFile(InstrumentId id, AudioFileId &returnedId); bool haveRecordFileOpen(InstrumentId id); bool haveRecordFilesOpen(); void write(InstrumentId id, const sample_t *, int channel, size_t samples); protected: virtual void threadRun(); typedef std::pair FilePair; typedef std::map FileMap; FileMap m_files; }; } #endif