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/* $Id$ */ |
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/* |
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* FreeBob Streaming API |
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* FreeBob = Firewire (pro-)audio for linux |
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* |
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* http://freebob.sf.net |
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* |
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* Copyright (C) 2005,2006 Pieter Palmers <pieterpalmers@users.sourceforge.net> |
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* Copyright (C) 2006 Jonathan Woithe <jwoithe@physics.adelaide.edu.au> |
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* |
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* This program is free software {} you can redistribute it and/or modify |
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* it under the terms of the GNU General Public License as published by |
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* the Free Software Foundation {} either version 2 of the License, or |
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* (at your option) any later version. |
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* |
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* This program is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY {} without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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* GNU General Public License for more details. |
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* |
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* You should have received a copy of the GNU General Public License |
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* along with this program {} if not, write to the Free Software |
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
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* |
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* |
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* |
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*/ |
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#ifndef __FREEBOB_MOTUSTREAMPROCESSOR__ |
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#define __FREEBOB_MOTUSTREAMPROCESSOR__ |
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#include <assert.h> |
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#include "../debugmodule/debugmodule.h" |
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#include "StreamProcessor.h" |
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#include "../libutil/DelayLockedLoop.h" |
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#ifdef ENABLE_MOTU |
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namespace FreebobStreaming { |
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class MotuAudioPort; |
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/** |
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* This class implements the outgoing stream processing for |
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* motu devices |
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*/ |
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class MotuTransmitStreamProcessor |
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: public TransmitStreamProcessor |
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{ |
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public: |
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MotuTransmitStreamProcessor(int port, int framerate, |
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unsigned int event_size); |
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virtual ~MotuTransmitStreamProcessor(); |
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enum raw1394_iso_disposition |
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getPacket(unsigned char *data, unsigned int *length, |
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unsigned char *tag, unsigned char *sy, |
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int cycle, unsigned int dropped, unsigned int max_length); |
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bool init(); |
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bool reset(); |
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bool prepare(); |
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bool prepareForStop(); |
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bool prepareForStart(); |
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bool prepareForEnable(uint64_t time_to_enable_at); |
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bool putFrames(unsigned int nbframes, int64_t ts); ///< transfer the buffer contents from the client |
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// These two are important to calculate the optimal ISO DMA buffers |
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// size. An estimate will do. |
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unsigned int getPacketsPerPeriod() {return (m_period*8000) / m_framerate;}; |
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unsigned int getMaxPacketSize() {return m_framerate<=48000?616:(m_framerate<=96000?1032:1160);}; |
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int getMinimalSyncDelay(); |
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void setVerboseLevel(int l); |
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protected: |
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/* |
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* An iso packet mostly consists of multiple events. m_event_size |
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* is the size of a single 'event' in bytes. |
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*/ |
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unsigned int m_event_size; |
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// Keep track of transmission data block count |
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unsigned int m_tx_dbc; |
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// Used to keep track of the close-down zeroing of output data |
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signed int m_closedown_count; |
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signed int m_streaming_active; |
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bool prefill(); |
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bool transferSilence(unsigned int size); |
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bool processWriteBlock(char *data, unsigned int nevents, unsigned int offset); |
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bool encodePacketPorts(quadlet_t *data, unsigned int nevents, unsigned int dbc); |
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int transmitSilenceBlock(char *data, unsigned int nevents, |
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unsigned int offset); |
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int encodePortToMotuEvents(MotuAudioPort *p, quadlet_t *data, |
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unsigned int offset, unsigned int nevents); |
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int encodeSilencePortToMotuEvents(MotuAudioPort *p, quadlet_t *data, |
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unsigned int offset, unsigned int nevents); |
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DECLARE_DEBUG_MODULE; |
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}; |
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/** |
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* This class implements the incoming stream processing for |
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* motu devices |
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*/ |
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class MotuReceiveStreamProcessor |
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: public ReceiveStreamProcessor |
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{ |
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public: |
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MotuReceiveStreamProcessor(int port, int framerate, unsigned int event_size); |
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virtual ~MotuReceiveStreamProcessor(); |
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enum raw1394_iso_disposition putPacket(unsigned char *data, unsigned int length, |
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unsigned char channel, unsigned char tag, unsigned char sy, |
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unsigned int cycle, unsigned int dropped); |
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bool getFrames(unsigned int nbframes); ///< transfer the buffer contents to the client |
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bool init(); |
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bool reset(); |
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bool prepare(); |
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// these two are important to calculate the optimal |
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// ISO DMA buffers size |
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// an estimate will do |
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unsigned int getPacketsPerPeriod() {return (m_period*8000) / m_framerate;}; |
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unsigned int getMaxPacketSize() {return m_framerate<=48000?616:(m_framerate<=96000?1032:1160);}; |
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int getMinimalSyncDelay(); |
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virtual void setVerboseLevel(int l); |
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signed int setEventSize(unsigned int size); |
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unsigned int getEventSize(void); |
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virtual bool prepareForStop(); |
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virtual bool prepareForStart(); |
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protected: |
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bool processReadBlock(char *data, unsigned int nevents, unsigned int offset); |
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bool decodePacketPorts(quadlet_t *data, unsigned int nevents, unsigned int dbc); |
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signed int decodeMotuEventsToPort(MotuAudioPort *p, quadlet_t *data, unsigned int offset, unsigned int nevents); |
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/* |
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* An iso packet mostly consists of multiple events. m_event_size |
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* is the size of a single 'event' in bytes. |
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*/ |
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unsigned int m_event_size; |
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// Signifies a closedown is in progress, in which case incoming data |
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// is junked. |
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signed int m_closedown_active; |
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uint64_t m_last_timestamp; /// last timestamp (in ticks) |
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uint64_t m_last_timestamp2; /// last timestamp (in ticks) |
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uint64_t m_last_timestamp_at_period_ticks; |
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DECLARE_DEBUG_MODULE; |
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}; |
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} // end of namespace FreebobStreaming |
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#endif /* ENABLE_MOTU */ |
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#endif /* __FREEBOB_MOTUSTREAMPROCESSOR__ */ |
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