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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) 2006 Pieter Palmers <pieterpalmers@users.sourceforge.net> |
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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_ISOHANDLER__ |
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#define __FREEBOB_ISOHANDLER__ |
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#include "../debugmodule/debugmodule.h" |
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#include <libraw1394/raw1394.h> |
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enum raw1394_iso_disposition ; |
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namespace FreebobStreaming |
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{ |
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class IsoStream; |
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/*! |
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\brief The Base Class for ISO Handlers |
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These classes perform the actual ISO communication through libraw1394. |
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They are different from IsoStreams because one handler can provide multiple |
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streams with packets in case of ISO multichannel receive. |
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*/ |
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class IsoHandler |
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{ |
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protected: |
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public: |
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enum EHandlerType { |
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EHT_Receive, |
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EHT_Transmit |
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}; |
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IsoHandler(int port) |
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: m_handle(0), m_handle_util(0), m_port(port), |
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m_buf_packets(400), m_max_packet_size(1024), m_irq_interval(-1), |
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m_packetcount(0), m_dropped(0), m_Client(0) |
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{} |
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IsoHandler(int port, unsigned int buf_packets, unsigned int max_packet_size, int irq) |
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: m_handle(0), m_port(port), |
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m_buf_packets(buf_packets), m_max_packet_size( max_packet_size), |
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m_irq_interval(irq), m_packetcount(0), m_dropped(0), m_Client(0) |
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{} |
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virtual ~IsoHandler(); |
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virtual bool init(); |
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int iterate() { if(m_handle) return raw1394_loop_iterate(m_handle); else return -1; }; |
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void setVerboseLevel(int l); |
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// no setter functions, because those would require a re-init |
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unsigned int getMaxPacketSize() { return m_max_packet_size;}; |
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unsigned int getBuffersize() { return m_buf_packets;}; |
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int getWakeupInterval() { return m_irq_interval;}; |
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int getPacketCount() {return m_packetcount;}; |
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void resetPacketCount() {m_packetcount=0;}; |
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int getDroppedCount() {return m_dropped;}; |
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void resetDroppedCount() {m_dropped=0;}; |
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virtual enum EHandlerType getType() = 0; |
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virtual bool start(int cycle) = 0; |
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virtual bool stop(); |
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int getFileDescriptor() { return raw1394_get_fd(m_handle);}; |
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void dumpInfo(); |
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bool inUse() {return (m_Client != 0) ;}; |
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virtual bool isStreamRegistered(IsoStream *s) {return (m_Client == s);}; |
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virtual bool registerStream(IsoStream *); |
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virtual bool unregisterStream(IsoStream *); |
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int getLocalNodeId() {return raw1394_get_local_id( m_handle );}; |
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int getPort() {return m_port;}; |
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virtual bool prepare() = 0; |
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// get the most recent cycle counter value |
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// RT safe |
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unsigned int getCycleCounter(); |
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// update the cycle counter cache |
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// not RT safe |
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// the isohandlermanager is responsible for calling this! |
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void updateCycleCounter(); |
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protected: |
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raw1394handle_t m_handle; |
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raw1394handle_t m_handle_util; |
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int m_port; |
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unsigned int m_buf_packets; |
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unsigned int m_max_packet_size; |
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int m_irq_interval; |
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unsigned int m_cyclecounter; |
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int m_packetcount; |
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int m_dropped; |
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IsoStream *m_Client; |
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virtual int handleBusReset(unsigned int generation) = 0; |
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DECLARE_DEBUG_MODULE; |
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private: |
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static int busreset_handler(raw1394handle_t handle, unsigned int generation); |
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}; |
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/*! |
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\brief ISO receive handler class (not multichannel) |
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*/ |
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class IsoRecvHandler : public IsoHandler |
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{ |
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public: |
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IsoRecvHandler(int port); |
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IsoRecvHandler(int port, unsigned int buf_packets, unsigned int max_packet_size, int irq); |
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virtual ~IsoRecvHandler(); |
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bool init(); |
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enum EHandlerType getType() { return EHT_Receive;}; |
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// int registerStream(IsoStream *); |
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// int unregisterStream(IsoStream *); |
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bool start(int cycle); |
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bool prepare(); |
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private: |
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int handleBusReset(unsigned int generation); |
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static enum raw1394_iso_disposition |
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iso_receive_handler(raw1394handle_t handle, unsigned char *data, |
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unsigned int length, unsigned char channel, |
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unsigned char tag, unsigned char sy, unsigned int cycle, |
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unsigned int dropped); |
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enum raw1394_iso_disposition |
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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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}; |
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/*! |
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\brief ISO transmit handler class |
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*/ |
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class IsoXmitHandler : public IsoHandler |
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{ |
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public: |
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IsoXmitHandler(int port); |
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IsoXmitHandler(int port, unsigned int buf_packets, |
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unsigned int max_packet_size, int irq); |
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IsoXmitHandler(int port, unsigned int buf_packets, |
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unsigned int max_packet_size, int irq, |
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enum raw1394_iso_speed speed); |
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virtual ~IsoXmitHandler(); |
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bool init(); |
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enum EHandlerType getType() { return EHT_Transmit;}; |
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// int registerStream(IsoStream *); |
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// int unregisterStream(IsoStream *); |
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unsigned int getPreBuffers() {return m_prebuffers;}; |
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void setPreBuffers(unsigned int n) {m_prebuffers=n;}; |
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bool start(int cycle); |
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bool prepare(); |
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private: |
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int handleBusReset(unsigned int generation); |
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static enum raw1394_iso_disposition iso_transmit_handler(raw1394handle_t handle, |
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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); |
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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); |
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enum raw1394_iso_speed m_speed; |
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unsigned int m_prebuffers; |
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}; |
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} |
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#endif /* __FREEBOB_ISOHANDLER__ */ |
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