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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 library is free software; you can redistribute it and/or |
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* modify it under the terms of the GNU Lesser General Public |
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* License version 2.1, as published by the Free Software Foundation; |
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* |
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* This library 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 GNU |
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* Lesser General Public License for more details. |
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* |
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* You should have received a copy of the GNU Lesser General Public |
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* License along with this library; if not, write to the Free Software |
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, |
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* MA 02110-1301 USA |
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*/ |
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#include "Port.h" |
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#include <stdlib.h> |
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#include <assert.h> |
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|
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namespace Streaming { |
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|
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IMPL_DEBUG_MODULE( Port, Port, DEBUG_LEVEL_NORMAL ); |
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|
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Port::Port(std::string name, enum E_PortType porttype, enum E_Direction direction) |
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: m_Name(name), |
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m_SignalType(E_PeriodSignalled), |
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m_BufferType(E_PointerBuffer), |
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m_disabled(true), |
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m_buffersize(0), |
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m_eventsize(0), |
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m_DataType(E_Int24), |
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m_PortType(porttype), |
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m_Direction(direction), |
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m_buffer(0), |
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m_ringbuffer(0), |
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m_use_external_buffer(false), |
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m_do_ratecontrol(false), |
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m_event_interval(0), |
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m_slot_interval(0), |
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m_rate_counter(0), |
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m_rate_counter_minimum(0), |
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m_average_ratecontrol(false), |
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m_State(E_Created) |
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{ |
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|
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} |
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|
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/** |
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* The idea is that you set all port parameters, and then initialize the port. |
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* This allocates all resources and makes the port usable. However, you can't |
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* change the port properties anymore after this. |
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* |
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* @return true if successfull. false if not (all resources are freed). |
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*/ |
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bool Port::init() { |
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if (m_State != E_Created) { |
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debugFatal("Port (%s) not in E_Created state: %d\n",m_Name.c_str(),m_State); |
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return false; |
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} |
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|
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if (m_buffersize==0) { |
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debugFatal("Cannot initialize a port with buffersize=0\n"); |
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return false; |
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} |
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|
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switch (m_BufferType) { |
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case E_PointerBuffer: |
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if (m_use_external_buffer) { |
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// don't do anything |
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} else if (!allocateInternalBuffer()) { |
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debugFatal("Could not allocate internal buffer!\n"); |
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return false; |
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} |
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break; |
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|
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case E_RingBuffer: |
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if (m_use_external_buffer) { |
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debugFatal("Cannot use an external ringbuffer! \n"); |
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return false; |
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} else if (!allocateInternalRingBuffer()) { |
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debugFatal("Could not allocate internal ringbuffer!\n"); |
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return false; |
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} |
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break; |
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default: |
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debugFatal("Unsupported buffer type! (%d)\n",(int)m_BufferType); |
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return false; |
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break; |
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} |
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m_eventsize=getEventSize(); // this won't change, so cache it |
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m_State = E_Initialized; |
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return true; |
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} |
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bool Port::reset() { |
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if (m_BufferType==E_RingBuffer) { |
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ffado_ringbuffer_reset(m_ringbuffer); |
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} |
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return true; |
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}; |
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void Port::show() { |
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debugOutput(DEBUG_LEVEL_VERBOSE,"Name : %s\n", m_Name.c_str()); |
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debugOutput(DEBUG_LEVEL_VERBOSE,"Signal Type : %d\n", m_SignalType); |
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debugOutput(DEBUG_LEVEL_VERBOSE,"Buffer Type : %d\n", m_BufferType); |
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debugOutput(DEBUG_LEVEL_VERBOSE,"Enabled? : %d\n", m_disabled); |
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debugOutput(DEBUG_LEVEL_VERBOSE,"State? : %d\n", m_State); |
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debugOutput(DEBUG_LEVEL_VERBOSE,"Buffer Size : %d\n", m_buffersize); |
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debugOutput(DEBUG_LEVEL_VERBOSE,"Event Size : %d\n", m_eventsize); |
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debugOutput(DEBUG_LEVEL_VERBOSE,"Data Type : %d\n", m_DataType); |
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debugOutput(DEBUG_LEVEL_VERBOSE,"Port Type : %d\n", m_PortType); |
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debugOutput(DEBUG_LEVEL_VERBOSE,"Direction : %d\n", m_Direction); |
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debugOutput(DEBUG_LEVEL_VERBOSE,"Rate Control? : %d\n", m_do_ratecontrol); |
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} |
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void Port::setVerboseLevel(int l) { |
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setDebugLevel(l); |
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} |
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bool Port::setName(std::string name) { |
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debugOutput( DEBUG_LEVEL_VERBOSE, "Setting name to %s for port %s\n",name.c_str(),m_Name.c_str()); |
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if (m_State != E_Created) { |
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debugFatal("Port (%s) not in E_Created state: %d\n",m_Name.c_str(),m_State); |
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return false; |
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} |
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m_Name=name; |
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return true; |
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} |
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bool Port::setBufferSize(unsigned int newsize) { |
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debugOutput( DEBUG_LEVEL_VERBOSE, "Setting buffersize to %d for port %s\n",newsize,m_Name.c_str()); |
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if (m_State != E_Created) { |
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debugFatal("Port (%s) not in E_Created state: %d\n",m_Name.c_str(),m_State); |
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return false; |
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} |
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m_buffersize=newsize; |
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return true; |
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|
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} |
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unsigned int Port::getEventSize() { |
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switch (m_DataType) { |
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case E_Float: |
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return sizeof(float); |
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case E_Int24: // 24 bit 2's complement, packed in a 32bit integer (LSB's) |
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return sizeof(uint32_t); |
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case E_MidiEvent: |
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return sizeof(uint32_t); |
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default: |
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return 0; |
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} |
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} |
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bool Port::setDataType(enum E_DataType d) { |
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debugOutput( DEBUG_LEVEL_VERBOSE, "Setting datatype to %d for port %s\n",(int) d,m_Name.c_str()); |
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if (m_State != E_Created) { |
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debugFatal("Port (%s) not in E_Created state: %d\n",m_Name.c_str(),m_State); |
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return false; |
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} |
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|
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// do some sanity checks |
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bool type_is_ok=false; |
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switch (m_PortType) { |
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case E_Audio: |
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if(d == E_Int24) type_is_ok=true; |
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if(d == E_Float) type_is_ok=true; |
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break; |
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case E_Midi: |
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if(d == E_MidiEvent) type_is_ok=true; |
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break; |
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case E_Control: |
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if(d == E_Default) type_is_ok=true; |
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break; |
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default: |
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break; |
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} |
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if(!type_is_ok) { |
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debugFatal("Datatype not supported by this type of port!\n"); |
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return false; |
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} |
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m_DataType=d; |
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return true; |
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} |
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bool Port::setSignalType(enum E_SignalType s) { |
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debugOutput( DEBUG_LEVEL_VERBOSE, "Setting signaltype to %d for port %s\n",(int)s,m_Name.c_str()); |
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if (m_State != E_Created) { |
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debugFatal("Port (%s) not in E_Created state: %d\n",m_Name.c_str(),m_State); |
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return false; |
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} |
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|
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// do some sanity checks |
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bool type_is_ok=false; |
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switch (m_PortType) { |
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case E_Audio: |
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if(s == E_PeriodSignalled) type_is_ok=true; |
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break; |
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case E_Midi: |
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if(s == E_PacketSignalled) type_is_ok=true; |
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break; |
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case E_Control: |
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if(s == E_PeriodSignalled) type_is_ok=true; |
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break; |
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default: |
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break; |
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} |
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if(!type_is_ok) { |
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debugFatal("Signalling type not supported by this type of port!\n"); |
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return false; |
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} |
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m_SignalType=s; |
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return true; |
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|
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} |
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bool Port::setBufferType(enum E_BufferType b) { |
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debugOutput( DEBUG_LEVEL_VERBOSE, "Setting buffer type to %d for port %s\n",(int)b,m_Name.c_str()); |
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if (m_State != E_Created) { |
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debugFatal("Port (%s) not in E_Created state: %d\n",m_Name.c_str(),m_State); |
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return false; |
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} |
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|
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// do some sanity checks |
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bool type_is_ok=false; |
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switch (m_PortType) { |
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case E_Audio: |
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if(b == E_PointerBuffer) type_is_ok=true; |
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break; |
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case E_Midi: |
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if(b == E_RingBuffer) type_is_ok=true; |
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break; |
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case E_Control: |
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break; |
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default: |
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break; |
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} |
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|
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if(!type_is_ok) { |
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debugFatal("Buffer type not supported by this type of port!\n"); |
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return false; |
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} |
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m_BufferType=b; |
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return true; |
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|
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} |
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|
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bool Port::useExternalBuffer(bool b) { |
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|
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// If called on an initialised stream but the request isn't for a change silently |
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// allow it (relied on by C API as used by jack backend driver) |
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if (m_State==E_Initialized && m_use_external_buffer==b) |
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return true; |
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|
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debugOutput( DEBUG_LEVEL_VERBOSE, "Setting external buffer use to %d for port %s\n",(int)b,m_Name.c_str()); |
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|
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if (m_State != E_Created) { |
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debugFatal("Port (%s) not in E_Created state: %d\n",m_Name.c_str(),m_State); |
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return false; |
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} |
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m_use_external_buffer=b; |
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return true; |
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} |
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|
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// buffer handling api's for pointer buffers |
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/** |
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* Get the buffer address (being the external or the internal one). |
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* |
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* @param buff |
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*/ |
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void *Port::getBufferAddress() { |
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assert(m_BufferType==E_PointerBuffer); |
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return m_buffer; |
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}; |
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|
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/** |
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* Set the external buffer address. |
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* only call this when you have specified that you will use |
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* an external buffer before doing the init() |
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* |
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* @param buff |
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*/ |
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void Port::setExternalBufferAddress(void *buff) { |
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assert(m_BufferType==E_PointerBuffer); |
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assert(m_use_external_buffer); // don't call this with an internal buffer! |
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m_buffer=buff; |
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}; |
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|
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// buffer handling api's for ringbuffers |
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bool Port::writeEvent(void *event) { |
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|
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#ifdef DEBUG |
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if (m_State != E_Initialized) { |
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debugFatal("Port (%s) not in E_Initialized state: %d\n",m_Name.c_str(),m_State); |
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return false; |
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} |
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|
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if(m_BufferType!=E_RingBuffer) { |
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debugError("operation not allowed on non E_RingBuffer ports\n"); |
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show(); |
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return false; |
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} |
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assert(m_ringbuffer); |
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#endif |
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|
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debugOutput( DEBUG_LEVEL_VERY_VERBOSE, "Writing event %08X with size %d to port %s\n",*((quadlet_t *)event),m_eventsize, m_Name.c_str()); |
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return (ffado_ringbuffer_write(m_ringbuffer, (char *)event, m_eventsize)==m_eventsize); |
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} |
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|
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bool Port::readEvent(void *event) { |
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|
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#ifdef DEBUG |
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if (m_State != E_Initialized) { |
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debugFatal("Port (%s) not in E_Initialized state: %d\n",m_Name.c_str(),m_State); |
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return false; |
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} |
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|
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if(m_BufferType!=E_RingBuffer) { |
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debugError("operation not allowed on non E_RingBuffer ports\n"); |
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show(); |
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return false; |
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} |
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assert(m_ringbuffer); |
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#endif |
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|
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|
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unsigned int read=ffado_ringbuffer_read(m_ringbuffer, (char *)event, m_eventsize); |
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|
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debugOutput( DEBUG_LEVEL_VERY_VERBOSE, "Reading event %X with size %d from port %s\n",*((quadlet_t *)event),m_eventsize,m_Name.c_str()); |
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|
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return (read==m_eventsize); |
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} |
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|
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int Port::writeEvents(void *event, unsigned int nevents) { |
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|
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#ifdef DEBUG |
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358 |
if (m_State != E_Initialized) { |
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debugFatal("Port (%s) not in E_Initialized state: %d\n",m_Name.c_str(),m_State); |
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return false; |
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} |
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362 |
|
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if(m_BufferType!=E_RingBuffer) { |
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debugError("operation not allowed on non E_RingBuffer ports\n"); |
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show(); |
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return false; |
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} |
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assert(m_ringbuffer); |
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#endif |
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|
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|
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unsigned int bytes2write=m_eventsize*nevents; |
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373 |
|
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unsigned int written=ffado_ringbuffer_write(m_ringbuffer, (char *)event,bytes2write)/m_eventsize; |
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375 |
|
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376 |
#ifdef DEBUG |
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377 |
if(written) { |
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378 |
unsigned int i=0; |
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379 |
quadlet_t * tmp=(quadlet_t *)event; |
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380 |
debugOutput( DEBUG_LEVEL_VERY_VERBOSE, "Written %d events (",written); |
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for (i=0;i<written;i++) { |
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382 |
debugOutputShort(DEBUG_LEVEL_VERY_VERBOSE, "%X ", *(tmp+i)); |
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383 |
} |
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debugOutputShort(DEBUG_LEVEL_VERY_VERBOSE, ") to port %s\n",m_Name.c_str()); |
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385 |
} |
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386 |
#endif |
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387 |
|
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388 |
return written; |
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389 |
|
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390 |
} |
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391 |
|
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392 |
int Port::readEvents(void *event, unsigned int nevents) { |
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393 |
|
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394 |
#ifdef DEBUG |
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395 |
if (m_State != E_Initialized) { |
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396 |
debugFatal("Port (%s) not in E_Initialized state: %d\n",m_Name.c_str(),m_State); |
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397 |
return false; |
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398 |
} |
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399 |
if(m_BufferType!=E_RingBuffer) { |
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400 |
debugError("operation not allowed on non E_RingBuffer ports\n"); |
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401 |
show(); |
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402 |
return false; |
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403 |
} |
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404 |
assert(m_ringbuffer); |
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405 |
#endif |
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406 |
|
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407 |
|
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408 |
unsigned int bytes2read=m_eventsize*nevents; |
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409 |
|
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410 |
unsigned int read=ffado_ringbuffer_read(m_ringbuffer, (char *)event, bytes2read)/m_eventsize; |
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411 |
|
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412 |
#ifdef DEBUG |
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413 |
if(read) { |
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414 |
unsigned int i=0; |
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415 |
quadlet_t * tmp=(quadlet_t *)event; |
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416 |
debugOutput( DEBUG_LEVEL_VERY_VERBOSE, "Read %d events (",read); |
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417 |
for (i=0;i<read;i++) { |
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418 |
debugOutputShort(DEBUG_LEVEL_VERY_VERBOSE, "%X ", *(tmp+i)); |
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419 |
} |
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420 |
debugOutputShort(DEBUG_LEVEL_VERY_VERBOSE, ") from port %s\n",m_Name.c_str()); |
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421 |
} |
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422 |
#endif |
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423 |
|
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424 |
return read; |
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425 |
} |
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426 |
|
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427 |
/* rate control */ |
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428 |
bool Port::canRead() { |
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429 |
bool byte_present_in_buffer; |
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430 |
|
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431 |
bool retval=false; |
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432 |
|
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433 |
assert(m_ringbuffer); |
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434 |
|
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435 |
byte_present_in_buffer=(ffado_ringbuffer_read_space(m_ringbuffer) >= m_eventsize); |
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436 |
|
---|
437 |
if(byte_present_in_buffer) { |
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438 |
|
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439 |
if(!m_do_ratecontrol) { |
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440 |
return true; |
---|
441 |
} |
---|
442 |
|
---|
443 |
if(m_rate_counter <= 0) { |
---|
444 |
// update the counter |
---|
445 |
if(m_average_ratecontrol) { |
---|
446 |
m_rate_counter += m_event_interval; |
---|
447 |
assert(m_rate_counter<m_event_interval); |
---|
448 |
} else { |
---|
449 |
m_rate_counter = m_event_interval; |
---|
450 |
} |
---|
451 |
|
---|
452 |
retval=true; |
---|
453 |
} else { |
---|
454 |
debugOutput( DEBUG_LEVEL_VERY_VERBOSE, "Rate limit (%s)! rate_counter=%d \n",m_Name.c_str(),m_rate_counter); |
---|
455 |
|
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456 |
} |
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457 |
} |
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458 |
|
---|
459 |
|
---|
460 |
m_rate_counter -= m_slot_interval; |
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461 |
|
---|
462 |
// we have to limit the decrement of the ratecounter somehow. |
---|
463 |
// m_rate_counter_minimum is initialized when enabling ratecontrol |
---|
464 |
if(m_rate_counter < m_rate_counter_minimum) { |
---|
465 |
m_rate_counter = m_rate_counter_minimum; |
---|
466 |
} |
---|
467 |
|
---|
468 |
return retval; |
---|
469 |
} |
---|
470 |
|
---|
471 |
bool Port::useRateControl(bool use, unsigned int slot_interval, |
---|
472 |
unsigned int event_interval, bool average) { |
---|
473 |
|
---|
474 |
if (use) { |
---|
475 |
debugOutput(DEBUG_LEVEL_VERBOSE, "Enabling rate control for port %s...\n",m_Name.c_str()); |
---|
476 |
if(slot_interval>event_interval) { |
---|
477 |
debugWarning("Rate control not needed!\n",m_Name.c_str()); |
---|
478 |
m_do_ratecontrol=false; |
---|
479 |
return false; |
---|
480 |
} |
---|
481 |
if(slot_interval==0) { |
---|
482 |
debugFatal("Cannot have slot interval == 0!\n"); |
---|
483 |
m_do_ratecontrol=false; |
---|
484 |
return false; |
---|
485 |
} |
---|
486 |
if(event_interval==0) { |
---|
487 |
debugFatal("Cannot have event interval == 0!\n"); |
---|
488 |
m_do_ratecontrol=false; |
---|
489 |
return false; |
---|
490 |
} |
---|
491 |
m_do_ratecontrol=use; |
---|
492 |
m_event_interval=event_interval; |
---|
493 |
m_slot_interval=slot_interval; |
---|
494 |
m_rate_counter=0; |
---|
495 |
|
---|
496 |
// NOTE: pretty arbitrary, but in average mode this limits the peak stream rate |
---|
497 |
m_rate_counter_minimum=-(2*event_interval); |
---|
498 |
|
---|
499 |
m_average_ratecontrol=average; |
---|
500 |
|
---|
501 |
} else { |
---|
502 |
debugOutput(DEBUG_LEVEL_VERBOSE, "Disabling rate control for port %s...\n",m_Name.c_str()); |
---|
503 |
m_do_ratecontrol=use; |
---|
504 |
} |
---|
505 |
return true; |
---|
506 |
} |
---|
507 |
|
---|
508 |
/// Enable the port. (this can be called anytime) |
---|
509 |
void |
---|
510 |
Port::enable() { |
---|
511 |
debugOutput(DEBUG_LEVEL_VERBOSE, "Enabling port %s...\n",m_Name.c_str()); |
---|
512 |
m_disabled=false; |
---|
513 |
}; |
---|
514 |
|
---|
515 |
/// Disable the port. (this can be called anytime) |
---|
516 |
void |
---|
517 |
Port::disable() { |
---|
518 |
debugOutput(DEBUG_LEVEL_VERBOSE, "Disabling port %s...\n",m_Name.c_str()); |
---|
519 |
m_disabled=false; |
---|
520 |
}; |
---|
521 |
|
---|
522 |
|
---|
523 |
/* Private functions */ |
---|
524 |
|
---|
525 |
bool Port::allocateInternalBuffer() { |
---|
526 |
int event_size=getEventSize(); |
---|
527 |
|
---|
528 |
debugOutput(DEBUG_LEVEL_VERBOSE, |
---|
529 |
"Allocating internal buffer of %d events with size %d (%s)\n", |
---|
530 |
m_buffersize, event_size, m_Name.c_str()); |
---|
531 |
|
---|
532 |
if(m_buffer) { |
---|
533 |
debugWarning("already has an internal buffer attached, re-allocating\n"); |
---|
534 |
freeInternalBuffer(); |
---|
535 |
} |
---|
536 |
|
---|
537 |
m_buffer=calloc(m_buffersize,event_size); |
---|
538 |
if (!m_buffer) { |
---|
539 |
debugFatal("could not allocate internal buffer\n"); |
---|
540 |
m_buffersize=0; |
---|
541 |
return false; |
---|
542 |
} |
---|
543 |
|
---|
544 |
return true; |
---|
545 |
} |
---|
546 |
|
---|
547 |
void Port::freeInternalBuffer() { |
---|
548 |
debugOutput(DEBUG_LEVEL_VERBOSE, |
---|
549 |
"Freeing internal buffer (%s)\n",m_Name.c_str()); |
---|
550 |
|
---|
551 |
if(m_buffer) { |
---|
552 |
free(m_buffer); |
---|
553 |
m_buffer=0; |
---|
554 |
} |
---|
555 |
} |
---|
556 |
|
---|
557 |
bool Port::allocateInternalRingBuffer() { |
---|
558 |
int event_size=getEventSize(); |
---|
559 |
|
---|
560 |
debugOutput(DEBUG_LEVEL_VERBOSE, |
---|
561 |
"Allocating internal buffer of %d events with size %d (%s)\n", |
---|
562 |
m_buffersize, event_size, m_Name.c_str()); |
---|
563 |
|
---|
564 |
if(m_ringbuffer) { |
---|
565 |
debugWarning("already has an internal ringbuffer attached, re-allocating\n"); |
---|
566 |
freeInternalRingBuffer(); |
---|
567 |
} |
---|
568 |
|
---|
569 |
m_ringbuffer=ffado_ringbuffer_create(m_buffersize * event_size); |
---|
570 |
if (!m_ringbuffer) { |
---|
571 |
debugFatal("could not allocate internal ringbuffer\n"); |
---|
572 |
m_buffersize=0; |
---|
573 |
return false; |
---|
574 |
} |
---|
575 |
|
---|
576 |
return true; |
---|
577 |
} |
---|
578 |
|
---|
579 |
void Port::freeInternalRingBuffer() { |
---|
580 |
debugOutput(DEBUG_LEVEL_VERBOSE, |
---|
581 |
"Freeing internal ringbuffer (%s)\n",m_Name.c_str()); |
---|
582 |
|
---|
583 |
if(m_ringbuffer) { |
---|
584 |
ffado_ringbuffer_free(m_ringbuffer); |
---|
585 |
m_ringbuffer=0; |
---|
586 |
} |
---|
587 |
} |
---|
588 |
|
---|
589 |
} |
---|