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/* |
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* Copyright (C) 2005-2009 by Jonathan Woithe |
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* Copyright (C) 2005-2008 by Pieter Palmers |
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* |
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* This file is part of FFADO |
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* FFADO = Free FireWire (pro-)audio drivers for linux |
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* |
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* FFADO is based upon FreeBoB. |
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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) version 3 of the License. |
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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, see <http://www.gnu.org/licenses/>. |
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* |
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*/ |
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#ifndef __FFADO_RMERECEIVESTREAMPROCESSOR__ |
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#define __FFADO_RMERECEIVESTREAMPROCESSOR__ |
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/** |
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* This class implements RME streaming |
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*/ |
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#include "debugmodule/debugmodule.h" |
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#include "../generic/StreamProcessor.h" |
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#include "../util/cip.h" |
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namespace Streaming { |
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class RmeAudioPort; |
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class RmeMidiPort; |
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/*! |
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* \brief The Base Class for a RME receive stream processor |
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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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*/ |
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class RmeReceiveStreamProcessor |
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: public StreamProcessor |
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{ |
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public: |
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/** |
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* Create a RME receive StreamProcessor |
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* @param port 1394 port |
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* @param dimension number of substreams in the ISO stream |
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* (midi-muxed is only one stream) |
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*/ |
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RmeReceiveStreamProcessor(FFADODevice &parent, unsigned int model, unsigned int event_size); |
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virtual ~RmeReceiveStreamProcessor() {}; |
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enum eChildReturnValue processPacketHeader(unsigned char *data, unsigned int length, |
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unsigned char tag, unsigned char sy, |
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uint32_t pkt_ctr); |
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enum eChildReturnValue processPacketData(unsigned char *data, unsigned int length); |
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virtual bool prepareChild(); |
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public: |
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virtual unsigned int getEventSize() |
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{return m_event_size;}; |
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virtual unsigned int getMaxPacketSize(); |
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virtual unsigned int getEventsPerFrame() |
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{ return 1; }; |
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virtual unsigned int getNominalFramesPerPacket(); |
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/* For testing only at this stage */ |
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signed int n_hw_tx_buffer_samples; |
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protected: |
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bool processReadBlock(char *data, unsigned int nevents, unsigned int offset); |
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private: |
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bool decodePacketPorts(quadlet_t *data, unsigned int nevents, unsigned int dbc); |
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int decodeRmeEventsToPort(RmeAudioPort *, quadlet_t *data, unsigned int offset, unsigned int nevents); |
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int decodeRmeMidiEventsToPort(RmeMidiPort *, quadlet_t *data, unsigned int offset, unsigned int nevents); |
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unsigned int m_rme_model; |
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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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/* A small MIDI buffer to cover for the case where we need to span a |
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* period - that is, if more than one MIDI byte is sent per packet. |
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* Since the long-term average data rate must be close to the MIDI spec |
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* (as it's coming from a physical MIDI port_ this buffer doesn't have |
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* to be particularly large. The size is a power of 2 for optimisation |
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* reasons. |
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* |
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* FIXME: it is yet to be determined whether this is required for RME |
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* devices. |
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*/ |
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#define RX_MIDIBUFFER_SIZE_EXP 6 |
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#define RX_MIDIBUFFER_SIZE (1<<RX_MIDIBUFFER_SIZE_EXP) |
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unsigned int midibuffer[RX_MIDIBUFFER_SIZE]; |
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unsigned mb_head, mb_tail; |
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}; |
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} // end of namespace Streaming |
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#endif /* __FFADO_RMERECEIVESTREAMPROCESSOR__ */ |
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