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/* |
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* Copyright (C) 2005-2007 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 3 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, see <http://www.gnu.org/licenses/>. |
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* |
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*/ |
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#include "IsoHandlerManager.h" |
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#include "ieee1394service.h" |
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#include "IsoHandler.h" |
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#include "libstreaming/generic/StreamProcessor.h" |
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#include "libutil/Atomic.h" |
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#include <assert.h> |
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#define MINIMUM_INTERRUPTS_PER_PERIOD 8U |
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IMPL_DEBUG_MODULE( IsoHandlerManager, IsoHandlerManager, DEBUG_LEVEL_NORMAL ); |
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using namespace Streaming; |
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IsoHandlerManager::IsoHandlerManager(Ieee1394Service& service) |
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: m_State(E_Created) |
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, m_service( service ) |
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, m_realtime(false), m_priority(0) |
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{} |
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|
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IsoHandlerManager::IsoHandlerManager(Ieee1394Service& service, bool run_rt, int rt_prio) |
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: m_State(E_Created) |
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, m_service( service ) |
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, m_realtime(run_rt), m_priority(rt_prio) |
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{} |
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IsoHandlerManager::~IsoHandlerManager() |
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{ |
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stopHandlers(); |
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} |
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|
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bool |
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IsoHandlerManager::setThreadParameters(bool rt, int priority) { |
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if (priority > 98) priority = 98; // cap the priority |
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m_realtime = rt; |
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m_priority = priority; |
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bool result = true; |
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for ( IsoHandlerVectorIterator it = m_IsoHandlers.begin(); |
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it != m_IsoHandlers.end(); |
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++it ) |
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{ |
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result &= (*it)->setThreadParameters(m_realtime, m_priority); |
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} |
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return result; |
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} |
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|
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bool IsoHandlerManager::init() |
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{ |
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debugOutput( DEBUG_LEVEL_VERBOSE, "Initializing ISO manager %p...\n", this); |
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// check state |
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if(m_State != E_Created) { |
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debugError("Manager already initialized...\n"); |
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return false; |
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} |
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m_State=E_Running; |
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return true; |
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} |
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bool |
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IsoHandlerManager::disable(IsoHandler *h) { |
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bool result; |
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int i=0; |
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debugOutput(DEBUG_LEVEL_VERY_VERBOSE, "Disable on IsoHandler %p\n", h); |
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for ( IsoHandlerVectorIterator it = m_IsoHandlers.begin(); |
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it != m_IsoHandlers.end(); |
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++it ) |
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{ |
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if ((*it) == h) { |
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result = h->disable(); |
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debugOutput(DEBUG_LEVEL_VERY_VERBOSE, " disabled\n"); |
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return result; |
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} |
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i++; |
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} |
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debugError("Handler not found\n"); |
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return false; |
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} |
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bool |
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IsoHandlerManager::enable(IsoHandler *h) { |
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bool result; |
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int i=0; |
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debugOutput(DEBUG_LEVEL_VERY_VERBOSE, "Enable on IsoHandler %p\n", h); |
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for ( IsoHandlerVectorIterator it = m_IsoHandlers.begin(); |
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it != m_IsoHandlers.end(); |
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++it ) |
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{ |
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if ((*it) == h) { |
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result = h->enable(); |
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debugOutput(DEBUG_LEVEL_VERY_VERBOSE, " enabled\n"); |
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return result; |
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} |
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i++; |
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} |
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debugError("Handler not found\n"); |
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return false; |
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} |
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bool IsoHandlerManager::registerHandler(IsoHandler *handler) |
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{ |
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debugOutput( DEBUG_LEVEL_VERBOSE, "enter...\n"); |
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assert(handler); |
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handler->setVerboseLevel(getDebugLevel()); |
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m_IsoHandlers.push_back(handler); |
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return true; |
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} |
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bool IsoHandlerManager::unregisterHandler(IsoHandler *handler) |
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{ |
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debugOutput( DEBUG_LEVEL_VERBOSE, "enter...\n"); |
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assert(handler); |
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for ( IsoHandlerVectorIterator it = m_IsoHandlers.begin(); |
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it != m_IsoHandlers.end(); |
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++it ) |
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{ |
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if ( *it == handler ) { |
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m_IsoHandlers.erase(it); |
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return true; |
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} |
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} |
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debugFatal("Could not find handler (%p)\n", handler); |
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return false; //not found |
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} |
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/** |
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* Registers an StreamProcessor with the IsoHandlerManager. |
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* |
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* If nescessary, an IsoHandler is created to handle this stream. |
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* Once an StreamProcessor is registered to the handler, it will be included |
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* in the ISO streaming cycle (i.e. receive/transmit of it will occur). |
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* |
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* @param stream the stream to register |
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* @return true if registration succeeds |
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* |
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* \todo : currently there is a one-to-one mapping |
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* between streams and handlers, this is not ok for |
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* multichannel receive |
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*/ |
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bool IsoHandlerManager::registerStream(StreamProcessor *stream) |
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{ |
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debugOutput( DEBUG_LEVEL_VERBOSE, "Registering stream %p\n",stream); |
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assert(stream); |
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IsoHandler* h = NULL; |
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// make sure the stream isn't already attached to a handler |
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for ( IsoHandlerVectorIterator it = m_IsoHandlers.begin(); |
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it != m_IsoHandlers.end(); |
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++it ) |
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{ |
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if((*it)->isStreamRegistered(stream)) { |
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debugError( "stream already registered!\n"); |
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return false; |
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} |
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} |
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// clean up all handlers that aren't used |
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pruneHandlers(); |
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// allocate a handler for this stream |
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if (stream->getType()==StreamProcessor::ePT_Receive) { |
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// setup the optimal parameters for the raw1394 ISO buffering |
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unsigned int packets_per_period = stream->getPacketsPerPeriod(); |
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#if 1 |
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// hardware interrupts occur when one DMA block is full, and the size of one DMA |
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// block = PAGE_SIZE. Setting the max_packet_size makes sure that the HW irq |
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// occurs at a period boundary (optimal CPU use) |
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// NOTE: try and use MINIMUM_INTERRUPTS_PER_PERIOD hardware interrupts |
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// per period for better latency. |
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unsigned int max_packet_size=(MINIMUM_INTERRUPTS_PER_PERIOD * getpagesize()) / packets_per_period; |
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if (max_packet_size < stream->getMaxPacketSize()) { |
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debugWarning("calculated max packet size (%u) < stream max packet size (%u)\n", |
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max_packet_size ,(unsigned int)stream->getMaxPacketSize()); |
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max_packet_size = stream->getMaxPacketSize(); |
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} |
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// Ensure we don't request a packet size bigger than the |
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// kernel-enforced maximum which is currently 1 page. |
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if (max_packet_size > (unsigned int)getpagesize()) { |
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debugWarning("max packet size (%u) > page size (%u)\n", max_packet_size ,(unsigned int)getpagesize()); |
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max_packet_size = getpagesize(); |
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} |
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unsigned int irq_interval = packets_per_period / MINIMUM_INTERRUPTS_PER_PERIOD; |
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if(irq_interval <= 0) irq_interval=1; |
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// FIXME: test |
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//irq_interval=1; |
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#else |
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// hardware interrupts occur when one DMA block is full, and the size of one DMA |
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// block = PAGE_SIZE. Setting the max_packet_size enables control over the IRQ |
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// frequency, as the controller uses max_packet_size, and not the effective size |
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// when writing to the DMA buffer. |
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// configure it such that we have an irq for every PACKETS_PER_INTERRUPT packets |
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unsigned int irq_interval=PACKETS_PER_INTERRUPT; |
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// unless the period size doesn't allow this |
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if ((packets_per_period/MINIMUM_INTERRUPTS_PER_PERIOD) < irq_interval) { |
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irq_interval=1; |
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} |
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// FIXME: test |
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irq_interval=1; |
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#warning Using fixed irq_interval |
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unsigned int max_packet_size=getpagesize() / irq_interval; |
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if (max_packet_size < stream->getMaxPacketSize()) { |
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max_packet_size=stream->getMaxPacketSize(); |
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} |
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// Ensure we don't request a packet size bigger than the |
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// kernel-enforced maximum which is currently 1 page. |
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if (max_packet_size > (unsigned int)getpagesize()) |
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max_packet_size = getpagesize(); |
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#endif |
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/* the receive buffer size doesn't matter for the latency, |
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but it has a minimal value in order for libraw to operate correctly (300) */ |
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int buffers=400; |
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//max_packet_size = getpagesize(); // HACK |
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//irq_interval=2; // HACK |
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// create the actual handler |
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h = new IsoRecvHandler(*this, buffers, |
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max_packet_size, irq_interval); |
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if(!h) { |
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debugFatal("Could not create IsoRecvHandler\n"); |
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return false; |
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} |
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debugOutput( DEBUG_LEVEL_VERBOSE, " registering IsoRecvHandler\n"); |
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|
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} else if (stream->getType()==StreamProcessor::ePT_Transmit) { |
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// setup the optimal parameters for the raw1394 ISO buffering |
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unsigned int packets_per_period = stream->getPacketsPerPeriod(); |
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|
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// hardware interrupts occur when one DMA block is full, and the size of one DMA |
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// block = PAGE_SIZE. Setting the max_packet_size makes sure that the HW irq |
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// occurs at a period boundary (optimal CPU use) |
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// NOTE: try and use MINIMUM_INTERRUPTS_PER_PERIOD interrupts per period |
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// for better latency. |
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unsigned int max_packet_size=MINIMUM_INTERRUPTS_PER_PERIOD * getpagesize() / packets_per_period; |
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if (max_packet_size < stream->getMaxPacketSize()) { |
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max_packet_size = stream->getMaxPacketSize(); |
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} |
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// Ensure we don't request a packet size bigger than the |
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// kernel-enforced maximum which is currently 1 page. |
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if (max_packet_size > (unsigned int)getpagesize()) |
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max_packet_size = getpagesize(); |
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unsigned int irq_interval = packets_per_period / MINIMUM_INTERRUPTS_PER_PERIOD; |
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if(irq_interval <= 0) irq_interval = 1; |
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// the transmit buffer size should be as low as possible for latency. |
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// note however that the raw1394 subsystem tries to keep this buffer |
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// full, so we have to make sure that we have enough events in our |
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// event buffers |
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// FIXME: latency spoiler |
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// every irq_interval packets an interrupt will occur. that is when |
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// buffers get transfered, meaning that we should have at least some |
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// margin here |
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//irq_interval=2; |
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//int buffers=30; |
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//max_packet_size = getpagesize(); // HACK |
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|
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// the SP specifies how many packets to buffer |
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int buffers = stream->getNbPacketsIsoXmitBuffer(); |
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// create the actual handler |
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h = new IsoXmitHandler(*this, buffers, |
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max_packet_size, irq_interval); |
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debugOutput( DEBUG_LEVEL_VERBOSE, " registering IsoXmitHandler\n"); |
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if(!h) { |
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debugFatal("Could not create IsoXmitHandler\n"); |
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return false; |
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} |
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} else { |
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debugFatal("Bad stream type\n"); |
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return false; |
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} |
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h->setVerboseLevel(getDebugLevel()); |
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// init the handler |
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if(!h->init()) { |
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debugFatal("Could not initialize receive handler\n"); |
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return false; |
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} |
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|
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// set the handler's thread parameters |
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if(!h->setThreadParameters(m_realtime, m_priority)) { |
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debugFatal("Could not set handler thread parameters\n"); |
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return false; |
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} |
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|
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// register the stream with the handler |
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if(!h->registerStream(stream)) { |
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debugFatal("Could not register receive stream with handler\n"); |
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return false; |
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} |
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|
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// register the handler with the manager |
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if(!registerHandler(h)) { |
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debugFatal("Could not register receive handler with manager\n"); |
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return false; |
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} |
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debugOutput( DEBUG_LEVEL_VERBOSE, " registered stream (%p) with handler (%p)\n", stream, h); |
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m_StreamProcessors.push_back(stream); |
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debugOutput( DEBUG_LEVEL_VERBOSE, " %d streams, %d handlers registered\n", |
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m_StreamProcessors.size(), m_IsoHandlers.size()); |
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return true; |
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} |
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|
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bool IsoHandlerManager::unregisterStream(StreamProcessor *stream) |
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{ |
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debugOutput( DEBUG_LEVEL_VERBOSE, "Unregistering stream %p\n",stream); |
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assert(stream); |
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|
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// make sure the stream isn't attached to a handler anymore |
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for ( IsoHandlerVectorIterator it = m_IsoHandlers.begin(); |
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it != m_IsoHandlers.end(); |
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++it ) |
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{ |
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if((*it)->isStreamRegistered(stream)) { |
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if(!(*it)->unregisterStream(stream)) { |
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debugOutput( DEBUG_LEVEL_VERBOSE, " could not unregister stream (%p) from handler (%p)...\n",stream,*it); |
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return false; |
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} |
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debugOutput( DEBUG_LEVEL_VERBOSE, " unregistered stream (%p) from handler (%p)...\n",stream,*it); |
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} |
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} |
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|
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// clean up all handlers that aren't used |
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pruneHandlers(); |
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|
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// remove the stream from the registered streams list |
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for ( StreamProcessorVectorIterator it = m_StreamProcessors.begin(); |
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it != m_StreamProcessors.end(); |
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++it ) |
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{ |
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if ( *it == stream ) { |
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m_StreamProcessors.erase(it); |
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debugOutput( DEBUG_LEVEL_VERBOSE, " deleted stream (%p) from list...\n", *it); |
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return true; |
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} |
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} |
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return false; //not found |
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} |
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|
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/** |
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* @brief unregister a handler from the manager |
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* @note called without the lock held. |
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*/ |
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void IsoHandlerManager::pruneHandlers() { |
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debugOutput( DEBUG_LEVEL_VERBOSE, "enter...\n"); |
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IsoHandlerVector toUnregister; |
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|
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// find all handlers that are not in use |
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for ( IsoHandlerVectorIterator it = m_IsoHandlers.begin(); |
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it != m_IsoHandlers.end(); |
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++it ) |
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{ |
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if(!((*it)->inUse())) { |
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debugOutput( DEBUG_LEVEL_VERBOSE, " handler (%p) not in use\n",*it); |
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toUnregister.push_back(*it); |
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} |
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} |
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// delete them |
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for ( IsoHandlerVectorIterator it = toUnregister.begin(); |
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it != toUnregister.end(); |
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++it ) |
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{ |
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unregisterHandler(*it); |
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|
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debugOutput( DEBUG_LEVEL_VERBOSE, " deleting handler (%p)\n",*it); |
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|
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// Now the handler's been unregistered it won't be reused |
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// again. Therefore it really needs to be formally deleted |
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// to free up the raw1394 handle. Otherwise things fall |
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// apart after several xrun recoveries as the system runs |
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// out of resources to support all the disused but still |
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// allocated raw1394 handles. At least this is the current |
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// theory as to why we end up with "memory allocation" |
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// failures after several Xrun recoveries. |
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delete *it; |
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} |
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} |
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|
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bool |
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IsoHandlerManager::stopHandlerForStream(Streaming::StreamProcessor *stream) { |
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// check state |
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426 |
if(m_State != E_Running) { |
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debugError("Incorrect state, expected E_Running, got %s\n", eHSToString(m_State)); |
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return false; |
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} |
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for ( IsoHandlerVectorIterator it = m_IsoHandlers.begin(); |
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it != m_IsoHandlers.end(); |
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++it ) |
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{ |
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434 |
if((*it)->isStreamRegistered(stream)) { |
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bool result; |
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debugOutput( DEBUG_LEVEL_VERBOSE, " stopping handler %p for stream %p\n", *it, stream); |
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result = (*it)->disable(); |
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438 |
if(!result) { |
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debugOutput( DEBUG_LEVEL_VERBOSE, " could not disable handler (%p)\n",*it); |
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return false; |
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} |
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return true; |
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} |
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} |
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debugError("Stream %p has no attached handler\n", stream); |
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return false; |
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447 |
} |
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448 |
|
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int |
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450 |
IsoHandlerManager::getPacketLatencyForStream(Streaming::StreamProcessor *stream) { |
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451 |
for ( IsoHandlerVectorIterator it = m_IsoHandlers.begin(); |
---|
452 |
it != m_IsoHandlers.end(); |
---|
453 |
++it ) |
---|
454 |
{ |
---|
455 |
if((*it)->isStreamRegistered(stream)) { |
---|
456 |
return (*it)->getPacketLatency(); |
---|
457 |
} |
---|
458 |
} |
---|
459 |
debugError("Stream %p has no attached handler\n", stream); |
---|
460 |
return 0; |
---|
461 |
} |
---|
462 |
|
---|
463 |
void |
---|
464 |
IsoHandlerManager::flushHandlerForStream(Streaming::StreamProcessor *stream) { |
---|
465 |
for ( IsoHandlerVectorIterator it = m_IsoHandlers.begin(); |
---|
466 |
it != m_IsoHandlers.end(); |
---|
467 |
++it ) |
---|
468 |
{ |
---|
469 |
if((*it)->isStreamRegistered(stream)) { |
---|
470 |
return (*it)->flush(); |
---|
471 |
} |
---|
472 |
} |
---|
473 |
debugError("Stream %p has no attached handler\n", stream); |
---|
474 |
return; |
---|
475 |
} |
---|
476 |
|
---|
477 |
bool |
---|
478 |
IsoHandlerManager::startHandlerForStream(Streaming::StreamProcessor *stream) { |
---|
479 |
return startHandlerForStream(stream, -1); |
---|
480 |
} |
---|
481 |
|
---|
482 |
bool |
---|
483 |
IsoHandlerManager::startHandlerForStream(Streaming::StreamProcessor *stream, int cycle) { |
---|
484 |
// check state |
---|
485 |
if(m_State != E_Running) { |
---|
486 |
debugError("Incorrect state, expected E_Running, got %s\n", eHSToString(m_State)); |
---|
487 |
return false; |
---|
488 |
} |
---|
489 |
for ( IsoHandlerVectorIterator it = m_IsoHandlers.begin(); |
---|
490 |
it != m_IsoHandlers.end(); |
---|
491 |
++it ) |
---|
492 |
{ |
---|
493 |
if((*it)->isStreamRegistered(stream)) { |
---|
494 |
bool result; |
---|
495 |
debugOutput( DEBUG_LEVEL_VERBOSE, " starting handler %p for stream %p\n", *it, stream); |
---|
496 |
result = (*it)->enable(cycle); |
---|
497 |
if(!result) { |
---|
498 |
debugOutput( DEBUG_LEVEL_VERBOSE, " could not enable handler (%p)\n",*it); |
---|
499 |
return false; |
---|
500 |
} |
---|
501 |
return true; |
---|
502 |
} |
---|
503 |
} |
---|
504 |
debugError("Stream %p has no attached handler\n", stream); |
---|
505 |
return false; |
---|
506 |
} |
---|
507 |
|
---|
508 |
bool IsoHandlerManager::stopHandlers() { |
---|
509 |
debugOutput( DEBUG_LEVEL_VERBOSE, "enter...\n"); |
---|
510 |
|
---|
511 |
// check state |
---|
512 |
if(m_State != E_Running) { |
---|
513 |
debugError("Incorrect state, expected E_Running, got %s\n", eHSToString(m_State)); |
---|
514 |
return false; |
---|
515 |
} |
---|
516 |
|
---|
517 |
bool retval=true; |
---|
518 |
|
---|
519 |
for ( IsoHandlerVectorIterator it = m_IsoHandlers.begin(); |
---|
520 |
it != m_IsoHandlers.end(); |
---|
521 |
++it ) |
---|
522 |
{ |
---|
523 |
debugOutput( DEBUG_LEVEL_VERBOSE, "Stopping handler (%p)\n",*it); |
---|
524 |
if(!(*it)->disable()){ |
---|
525 |
debugOutput( DEBUG_LEVEL_VERBOSE, " could not stop handler (%p)\n",*it); |
---|
526 |
retval=false; |
---|
527 |
} |
---|
528 |
} |
---|
529 |
|
---|
530 |
if (retval) { |
---|
531 |
m_State=E_Prepared; |
---|
532 |
} else { |
---|
533 |
m_State=E_Error; |
---|
534 |
} |
---|
535 |
return retval; |
---|
536 |
} |
---|
537 |
|
---|
538 |
bool IsoHandlerManager::reset() { |
---|
539 |
debugOutput( DEBUG_LEVEL_VERBOSE, "enter...\n"); |
---|
540 |
// check state |
---|
541 |
if(m_State == E_Error) { |
---|
542 |
debugFatal("Resetting from error condition not yet supported...\n"); |
---|
543 |
return false; |
---|
544 |
} |
---|
545 |
// if not in an error condition, reset means stop the handlers |
---|
546 |
return stopHandlers(); |
---|
547 |
} |
---|
548 |
|
---|
549 |
void IsoHandlerManager::setVerboseLevel(int i) { |
---|
550 |
setDebugLevel(i); |
---|
551 |
// propagate the debug level |
---|
552 |
for ( IsoHandlerVectorIterator it = m_IsoHandlers.begin(); |
---|
553 |
it != m_IsoHandlers.end(); |
---|
554 |
++it ) |
---|
555 |
{ |
---|
556 |
(*it)->setVerboseLevel(i); |
---|
557 |
} |
---|
558 |
} |
---|
559 |
|
---|
560 |
void IsoHandlerManager::dumpInfo() { |
---|
561 |
int i=0; |
---|
562 |
debugOutputShort( DEBUG_LEVEL_NORMAL, "Dumping IsoHandlerManager Stream handler information...\n"); |
---|
563 |
debugOutputShort( DEBUG_LEVEL_NORMAL, " State: %d\n",(int)m_State); |
---|
564 |
|
---|
565 |
for ( IsoHandlerVectorIterator it = m_IsoHandlers.begin(); |
---|
566 |
it != m_IsoHandlers.end(); |
---|
567 |
++it ) |
---|
568 |
{ |
---|
569 |
debugOutputShort( DEBUG_LEVEL_NORMAL, " IsoHandler %d (%p)\n",i++,*it); |
---|
570 |
(*it)->dumpInfo(); |
---|
571 |
} |
---|
572 |
} |
---|
573 |
|
---|
574 |
const char * |
---|
575 |
IsoHandlerManager::eHSToString(enum eHandlerStates s) { |
---|
576 |
switch (s) { |
---|
577 |
default: return "Invalid"; |
---|
578 |
case E_Created: return "Created"; |
---|
579 |
case E_Prepared: return "Prepared"; |
---|
580 |
case E_Running: return "Running"; |
---|
581 |
case E_Error: return "Error"; |
---|
582 |
} |
---|
583 |
} |
---|