/*
* Copyright (C) 2005-2008 by Pieter Palmers
*
* This file is part of FFADO
* FFADO = Free Firewire (pro-)audio drivers for linux
*
* FFADO is based upon FreeBoB.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 2 of the License, or
* (at your option) version 3 of the License.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see .
*
*/
#include "config.h"
#include "AmdtpReceiveStreamProcessor.h"
#include "AmdtpPort.h"
#include "../StreamProcessorManager.h"
#include "devicemanager.h"
#include "libieee1394/ieee1394service.h"
#include "libieee1394/IsoHandlerManager.h"
#include "libieee1394/cycletimer.h"
#include
#include
namespace Streaming {
/* --------------------- RECEIVE ----------------------- */
AmdtpReceiveStreamProcessor::AmdtpReceiveStreamProcessor(FFADODevice &parent, int dimension)
: StreamProcessor(parent, ePT_Receive)
, m_dimension( dimension )
, m_nb_audio_ports( 0 )
, m_nb_midi_ports( 0 )
{}
unsigned int
AmdtpReceiveStreamProcessor::getSytInterval() {
switch (m_StreamProcessorManager.getNominalRate()) {
case 32000:
case 44100:
case 48000:
return 8;
case 88200:
case 96000:
return 16;
case 176400:
case 192000:
return 32;
default:
debugError("Unsupported rate: %d\n", m_StreamProcessorManager.getNominalRate());
return 0;
}
}
bool AmdtpReceiveStreamProcessor::prepareChild() {
debugOutput( DEBUG_LEVEL_VERBOSE, "Preparing (%p)...\n", this);
m_syt_interval = getSytInterval();
if (!initPortCache()) {
debugError("Could not init port cache\n");
return false;
}
return true;
}
/**
* Processes packet header to extract timestamps and so on
* @param data
* @param length
* @param channel
* @param tag
* @param sy
* @param cycle
* @param dropped
* @return
*/
enum StreamProcessor::eChildReturnValue
AmdtpReceiveStreamProcessor::processPacketHeader(unsigned char *data, unsigned int length,
unsigned char channel, unsigned char tag, unsigned char sy,
unsigned int cycle, unsigned int dropped)
{
#ifdef DEBUG
static uint32_t now_prev=0;
static uint64_t now_prev_ticks=0;
#endif
struct iec61883_packet *packet = (struct iec61883_packet *) data;
assert(packet);
bool ok = (packet->syt != 0xFFFF) &&
(packet->fdf != 0xFF) &&
(packet->fmt == 0x10) &&
(packet->dbs > 0) &&
(length >= 2*sizeof(quadlet_t));
if(ok) {
uint32_t now = m_1394service.getCycleTimer();
#ifdef DEBUG
uint64_t now_ticks = CYCLE_TIMER_TO_TICKS(now);
if (diffTicks(now_ticks, now_prev_ticks) < 0) {
debugWarning("non-monotonic CTR on cycle %04u: %llu -> %llu\n", cycle, now_prev_ticks, now_ticks);
debugWarning(" : %08X -> %08X\n", now_prev, now);
debugOutput ( DEBUG_LEVEL_VERBOSE,
" current: %011llu (%03us %04ucy %04uticks)\n",
now,
(unsigned int)TICKS_TO_SECS( now ),
(unsigned int)TICKS_TO_CYCLES( now ),
(unsigned int)TICKS_TO_OFFSET( now ) );
debugOutput ( DEBUG_LEVEL_VERBOSE,
" prev : %011llu (%03us %04ucy %04uticks)\n",
now_prev,
(unsigned int)TICKS_TO_SECS( now_prev ),
(unsigned int)TICKS_TO_CYCLES( now_prev ),
(unsigned int)TICKS_TO_OFFSET( now_prev ) );
}
now_prev = now;
now_prev_ticks=now_ticks;
#endif
//=> convert the SYT to a full timestamp in ticks
m_last_timestamp = sytRecvToFullTicks((uint32_t)ntohs(packet->syt),
cycle, now);
}
return (ok ? eCRV_OK : eCRV_Invalid );
}
/**
* extract the data from the packet
* @pre the IEC61883 packet is valid according to isValidPacket
* @param data
* @param length
* @param channel
* @param tag
* @param sy
* @param cycle
* @param dropped
* @return
*/
enum StreamProcessor::eChildReturnValue
AmdtpReceiveStreamProcessor::processPacketData(unsigned char *data, unsigned int length,
unsigned char channel, unsigned char tag, unsigned char sy,
unsigned int cycle, unsigned int dropped_cycles) {
struct iec61883_packet *packet = (struct iec61883_packet *) data;
assert(packet);
unsigned int nevents=((length / sizeof (quadlet_t)) - 2)/packet->dbs;
// we have to keep in mind that there are also
// some packets buffered by the ISO layer,
// at most x=m_handler->getWakeupInterval()
// these contain at most x*syt_interval
// frames, meaning that we might receive
// this packet x*syt_interval*ticks_per_frame
// later than expected (the real receive time)
#ifdef DEBUG
if(isRunning()) {
debugOutputExtreme(DEBUG_LEVEL_VERY_VERBOSE,
"STMP: %lluticks | syt_interval=%d, tpf=%f\n",
m_last_timestamp, m_syt_interval, getTicksPerFrame());
}
#endif
if(m_data_buffer->writeFrames(nevents, (char *)(data+8), m_last_timestamp)) {
return eCRV_OK;
} else {
return eCRV_XRun;
}
}
/***********************************************
* Encoding/Decoding API *
***********************************************/
/**
* @brief write received events to the stream ringbuffers.
*/
bool AmdtpReceiveStreamProcessor::processReadBlock(char *data,
unsigned int nevents, unsigned int offset)
{
debugOutputExtreme( DEBUG_LEVEL_VERY_VERBOSE,
"(%p)->processReadBlock(%u, %u)\n",
this,nevents,offset);
// update the variable parts of the cache
updatePortCache();
// decode audio data
switch(m_StreamProcessorManager.getAudioDataType()) {
case StreamProcessorManager::eADT_Int24:
decodeAudioPortsInt24((quadlet_t *)data, offset, nevents);
break;
case StreamProcessorManager::eADT_Float:
decodeAudioPortsFloat((quadlet_t *)data, offset, nevents);
break;
}
// do midi ports
decodeMidiPorts((quadlet_t *)data, offset, nevents);
return true;
}
//#ifdef __SSE2__
#if 0 // SSE code is not ready yet
#include
#warning SSE2 build
/**
* @brief demux events to all audio ports (int24)
* @param data
* @param offset
* @param nevents
*/
void
AmdtpReceiveStreamProcessor::decodeAudioPortsInt24(quadlet_t *data,
unsigned int offset,
unsigned int nevents)
{
unsigned int j;
quadlet_t *target_event;
unsigned int i;
for (i = 0; i < m_nb_audio_ports; i++) {
struct _MBLA_port_cache &p = m_audio_ports.at(i);
target_event = (quadlet_t *)(data + i);
assert(nevents + offset <= p.buffer_size );
if(p.buffer && p.enabled) {
quadlet_t *buffer = (quadlet_t *)(p.buffer);
buffer += offset;
for(j = 0; j < nevents; j += 1) {
*(buffer)=(ntohl((*target_event) ) & 0x00FFFFFF);
buffer++;
target_event+=m_dimension;
}
}
}
}
/**
* @brief demux events to all audio ports (float)
* @param data
* @param offset
* @param nevents
*/
void
AmdtpReceiveStreamProcessor::decodeAudioPortsFloat(quadlet_t *data,
unsigned int offset,
unsigned int nevents)
{
unsigned int j;
quadlet_t *target_event;
unsigned int i;
const float multiplier = 1.0f / (float)(0x7FFFFF);
for (i = 0; i < m_nb_audio_ports; i++) {
struct _MBLA_port_cache &p = m_audio_ports.at(i);
target_event = (quadlet_t *)(data + i);
assert(nevents + offset <= p.buffer_size );
if(p.buffer && p.enabled) {
float *buffer = (float *)(p.buffer);
buffer += offset;
for(j = 0; j < nevents; j += 1) {
unsigned int v = ntohl(*target_event) & 0x00FFFFFF;
// sign-extend highest bit of 24-bit int
int tmp = (int)(v << 8) / 256;
*buffer = tmp * multiplier;
buffer++;
target_event+=m_dimension;
}
}
}
}
#else
/**
* @brief demux events to all audio ports (int24)
* @param data
* @param offset
* @param nevents
*/
void
AmdtpReceiveStreamProcessor::decodeAudioPortsInt24(quadlet_t *data,
unsigned int offset,
unsigned int nevents)
{
unsigned int j;
quadlet_t *target_event;
unsigned int i;
for (i = 0; i < m_nb_audio_ports; i++) {
struct _MBLA_port_cache &p = m_audio_ports.at(i);
target_event = (quadlet_t *)(data + i);
assert(nevents + offset <= p.buffer_size );
if(p.buffer && p.enabled) {
quadlet_t *buffer = (quadlet_t *)(p.buffer);
buffer += offset;
for(j = 0; j < nevents; j += 1) {
*(buffer)=(ntohl((*target_event) ) & 0x00FFFFFF);
buffer++;
target_event+=m_dimension;
}
}
}
}
/**
* @brief demux events to all audio ports (float)
* @param data
* @param offset
* @param nevents
*/
void
AmdtpReceiveStreamProcessor::decodeAudioPortsFloat(quadlet_t *data,
unsigned int offset,
unsigned int nevents)
{
unsigned int j;
quadlet_t *target_event;
unsigned int i;
const float multiplier = 1.0f / (float)(0x7FFFFF);
for (i = 0; i < m_nb_audio_ports; i++) {
struct _MBLA_port_cache &p = m_audio_ports.at(i);
target_event = (quadlet_t *)(data + i);
assert(nevents + offset <= p.buffer_size );
if(p.buffer && p.enabled) {
float *buffer = (float *)(p.buffer);
buffer += offset;
for(j = 0; j < nevents; j += 1) {
unsigned int v = ntohl(*target_event) & 0x00FFFFFF;
// sign-extend highest bit of 24-bit int
int tmp = (int)(v << 8) / 256;
*buffer = tmp * multiplier;
buffer++;
target_event+=m_dimension;
}
}
}
}
#endif
/**
* @brief decode all midi ports in the cache from events
* @param data
* @param offset
* @param nevents
*/
void
AmdtpReceiveStreamProcessor::decodeMidiPorts(quadlet_t *data,
unsigned int offset,
unsigned int nevents)
{
quadlet_t *target_event;
quadlet_t sample_int;
unsigned int i,j;
for (i = 0; i < m_nb_midi_ports; i++) {
struct _MIDI_port_cache &p = m_midi_ports.at(i);
if (p.buffer && p.enabled) {
uint32_t *buffer = (quadlet_t *)(p.buffer);
buffer += offset;
for (j = p.location;j < nevents; j += 8) {
target_event = (quadlet_t *) (data + ((j * m_dimension) + p.position));
sample_int=ntohl(*target_event);
// FIXME: this assumes that 2X and 3X speed isn't used,
// because only the 1X slot is put into the ringbuffer
if(IEC61883_AM824_GET_LABEL(sample_int) != IEC61883_AM824_LABEL_MIDI_NO_DATA) {
sample_int=(sample_int >> 16) & 0x000000FF;
sample_int |= 0x01000000; // flag that there is a midi event present
*buffer = sample_int;
debugOutput(DEBUG_LEVEL_VERBOSE, "Received midi byte %08X on port %p index %d\n", sample_int, p, j-p.location);
} else {
// make sure no event is received
*buffer = 0;
}
buffer+=8;
}
}
}
}
bool
AmdtpReceiveStreamProcessor::initPortCache() {
// make use of the fact that audio ports are the first ports in
// the cluster as per AMDTP. so we can sort the ports by position
// and have very efficient lookups:
// m_float_ports.at(i).buffer -> audio stream i buffer
// for midi ports we simply cache all port info since they are (usually) not
// that numerous
m_nb_audio_ports = 0;
m_audio_ports.clear();
m_nb_midi_ports = 0;
m_midi_ports.clear();
for(PortVectorIterator it = m_Ports.begin();
it != m_Ports.end();
++it )
{
AmdtpPortInfo *pinfo=dynamic_cast(*it);
assert(pinfo); // this should not fail!!
switch( pinfo->getFormat() )
{
case AmdtpPortInfo::E_MBLA:
m_nb_audio_ports++;
break;
case AmdtpPortInfo::E_SPDIF: // still unimplemented
break;
case AmdtpPortInfo::E_Midi:
m_nb_midi_ports++;
break;
default: // ignore
break;
}
}
unsigned int idx;
for (idx = 0; idx < m_nb_audio_ports; idx++) {
for(PortVectorIterator it = m_Ports.begin();
it != m_Ports.end();
++it )
{
AmdtpPortInfo *pinfo=dynamic_cast(*it);
debugOutput(DEBUG_LEVEL_VERY_VERBOSE,
"idx %u: looking at port %s at position %u\n",
idx, (*it)->getName().c_str(), pinfo->getPosition());
if(pinfo->getPosition() == idx) {
struct _MBLA_port_cache p;
p.port = dynamic_cast(*it);
if(p.port == NULL) {
debugError("Port is not an AmdtpAudioPort!\n");
return false;
}
p.buffer = NULL; // to be filled by updatePortCache
#ifdef DEBUG
p.buffer_size = (*it)->getBufferSize();
#endif
m_audio_ports.push_back(p);
debugOutput(DEBUG_LEVEL_VERBOSE,
"Cached port %s at position %u\n",
p.port->getName().c_str(), idx);
goto next_index;
}
}
debugError("No MBLA port found for position %d\n", idx);
return false;
next_index:
continue;
}
for(PortVectorIterator it = m_Ports.begin();
it != m_Ports.end();
++it )
{
AmdtpPortInfo *pinfo=dynamic_cast(*it);
debugOutput(DEBUG_LEVEL_VERY_VERBOSE,
"idx %u: looking at port %s at position %u, location %u\n",
idx, (*it)->getName().c_str(), pinfo->getPosition(), pinfo->getLocation());
if ((*it)->getPortType() == Port::E_Midi) {
struct _MIDI_port_cache p;
p.port = dynamic_cast(*it);
if(p.port == NULL) {
debugError("Port is not an AmdtpMidiPort!\n");
return false;
}
p.position = pinfo->getPosition();
p.location = pinfo->getLocation();
p.buffer = NULL; // to be filled by updatePortCache
#ifdef DEBUG
p.buffer_size = (*it)->getBufferSize();
#endif
m_midi_ports.push_back(p);
debugOutput(DEBUG_LEVEL_VERBOSE,
"Cached port %s at position %u, location %u\n",
p.port->getName().c_str(), p.position, p.location);
}
}
return true;
}
void
AmdtpReceiveStreamProcessor::updatePortCache() {
unsigned int idx;
for (idx = 0; idx < m_nb_audio_ports; idx++) {
struct _MBLA_port_cache& p = m_audio_ports.at(idx);
AmdtpAudioPort *port = p.port;
p.buffer = port->getBufferAddress();
p.enabled = !port->isDisabled();
}
for (idx = 0; idx < m_nb_midi_ports; idx++) {
struct _MIDI_port_cache& p = m_midi_ports.at(idx);
AmdtpMidiPort *port = p.port;
p.buffer = port->getBufferAddress();
p.enabled = !port->isDisabled();
}
}
} // end of namespace Streaming