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/* $Id$ */ |
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/* |
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* FreeBob Streaming API |
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* FreeBob = Firewire (pro-)audio for linux |
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* |
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* http://freebob.sf.net |
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* |
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* Copyright (C) 2005,2006,2007 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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#include "SytMonitor.h" |
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#include "src/libstreaming/IsoStream.h" |
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#include <netinet/in.h> |
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#include <assert.h> |
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IMPL_DEBUG_MODULE( SytMonitor, SytMonitor, DEBUG_LEVEL_VERBOSE ); |
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/* --------------------- RECEIVE ----------------------- */ |
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SytMonitor::SytMonitor(int port) |
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: IsoStream(IsoStream::EST_Receive, port) { |
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m_cinfo_buffer=freebob_ringbuffer_create(16384*sizeof(struct cycle_info)); |
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} |
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SytMonitor::~SytMonitor() { |
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freebob_ringbuffer_free(m_cinfo_buffer); |
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} |
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enum raw1394_iso_disposition |
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SytMonitor::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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enum raw1394_iso_disposition retval=RAW1394_ISO_OK; |
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struct iec61883_packet *packet = (struct iec61883_packet *) data; |
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unsigned int syt_timestamp=ntohs(packet->syt); |
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if (syt_timestamp == 0xFFFF) { |
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return RAW1394_ISO_OK; |
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} |
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uint32_t m_full_timestamp; |
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uint32_t m_full_timestamp_ticks; |
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debugOutput(DEBUG_LEVEL_VERBOSE,"%2u,%2u: CY=%4u, SYT=%08X (%3u secs + %4u cycles + %04u ticks)\n", |
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m_port,channel, |
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cycle,syt_timestamp, |
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CYCLE_TIMER_GET_SECS(syt_timestamp), |
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CYCLE_TIMER_GET_CYCLES(syt_timestamp), |
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CYCLE_TIMER_GET_OFFSET(syt_timestamp) |
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); |
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// reconstruct the full cycle |
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unsigned int cc=m_handler->getCycleTimer(); |
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unsigned int cc_cycles=CYCLE_TIMER_GET_CYCLES(cc); |
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unsigned int cc_seconds=CYCLE_TIMER_GET_SECS(cc); |
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// the cycletimer has wrapped since this packet was received |
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// we want cc_seconds to reflect the 'seconds' at the point this |
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// was received |
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if (cycle>cc_cycles) cc_seconds--; |
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m_full_timestamp_ticks=sytRecvToFullTicks((uint32_t)syt_timestamp, cycle, cc); |
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m_full_timestamp=TICKS_TO_CYCLE_TIMER(m_full_timestamp_ticks); |
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struct cycle_info cif; |
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cif.cycle=cycle; |
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cif.seconds=cc_seconds; |
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cif.syt=packet->syt; |
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cif.full_syt=m_full_timestamp; |
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// now we reconstruct the presentation time |
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cif.pres_seconds = CYCLE_TIMER_GET_SECS(m_full_timestamp); |
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cif.pres_cycle = CYCLE_TIMER_GET_CYCLES(m_full_timestamp); |
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cif.pres_offset = CYCLE_TIMER_GET_OFFSET(m_full_timestamp); |
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cif.pres_ticks = m_full_timestamp_ticks; |
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if (cif.pres_offset != (syt_timestamp & 0xFFF)) { |
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debugOutput(DEBUG_LEVEL_NORMAL,"P-offset error: %04X != %04X (P: %08X, R: %08X)\n", |
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cif.pres_offset, syt_timestamp & 0xFFF, m_full_timestamp, syt_timestamp); |
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} |
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if ((cif.pres_cycle & 0xF) != ((syt_timestamp & 0xF000)>>12)) { |
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debugOutput(DEBUG_LEVEL_NORMAL,"P-cycle error: %01X != %01X (P: %08X, R: %08X)\n", |
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cif.pres_cycle &0xF, (syt_timestamp & 0xF000)>>12, m_full_timestamp, syt_timestamp); |
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} |
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putCycleInfo(&cif); |
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return retval; |
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} |
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bool SytMonitor::putCycleInfo(struct cycle_info *cif) { |
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if(freebob_ringbuffer_write(m_cinfo_buffer,(char *)cif,sizeof(struct cycle_info)) |
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!=sizeof(struct cycle_info)) { |
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return false; |
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} |
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return true; |
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} |
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bool SytMonitor::readNextCycleInfo(struct cycle_info *cif) { |
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if(freebob_ringbuffer_peek(m_cinfo_buffer,(char *)cif,sizeof(struct cycle_info)) |
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!=sizeof(struct cycle_info)) { |
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return false; |
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} |
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return true; |
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} |
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bool SytMonitor::consumeNextCycleInfo() { |
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struct cycle_info cif; |
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if(freebob_ringbuffer_read(m_cinfo_buffer,(char *)&cif,sizeof(struct cycle_info)) |
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!=sizeof(struct cycle_info)) { |
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return false; |
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} |
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return true; |
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} |
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void SytMonitor::dumpInfo() |
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{ |
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IsoStream::dumpInfo(); |
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debugOutputShort( DEBUG_LEVEL_NORMAL, " Ringbuffer fill: %d\n", |
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freebob_ringbuffer_read_space(m_cinfo_buffer)/sizeof(struct cycle_info)); |
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}; |
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