root/branches/streaming-rework/src/libstreaming/AmdtpStreamProcessor.h

/* $Id$ */

/*
 *   FreeBob Streaming API
 *   FreeBob = Firewire (pro-)audio for linux
 *
 *   http://freebob.sf.net
 *
 *   Copyright (C) 2005,2006 Pieter Palmers <pieterpalmers@users.sourceforge.net>
 *
 *   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) any later version.
 *
 *   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, write to the Free Software
 *   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 *
 * 
 *
 */
#ifndef __FREEBOB_AMDTPSTREAMPROCESSOR__
#define __FREEBOB_AMDTPSTREAMPROCESSOR__

/**
 * This class implements IEC61883-6 / AM824 / AMDTP based streaming
 */

#include "../debugmodule/debugmodule.h"
#include "StreamProcessor.h"

#include "cip.h"
#include <libiec61883/iec61883.h>
#include <pthread.h>

#define AMDTP_MAX_PACKET_SIZE 2048

#define IEC61883_STREAM_TYPE_MIDI   0x0D
#define IEC61883_STREAM_TYPE_SPDIF  0x00
#define IEC61883_STREAM_TYPE_MBLA   0x06

#define IEC61883_AM824_LABEL_MASK                       0xFF000000
#define IEC61883_AM824_GET_LABEL(x)             (((x) & 0xFF000000) >> 24)
#define IEC61883_AM824_SET_LABEL(x,y)           ((x) | ((y)<<24))

#define IEC61883_AM824_LABEL_MIDI_NO_DATA       0x80 
#define IEC61883_AM824_LABEL_MIDI_1X            0x81 
#define IEC61883_AM824_LABEL_MIDI_2X            0x82
#define IEC61883_AM824_LABEL_MIDI_3X            0x83

namespace FreebobStreaming {

class Port;
class AmdtpAudioPort;
class AmdtpMidiPort;
class AmdtpReceiveStreamProcessor;

/*!
\brief The Base Class for an AMDTP transmit stream processor

 This class implements a TransmitStreamProcessor that multiplexes Ports 
 into AMDTP streams.
 
*/
class AmdtpTransmitStreamProcessor 
        : public TransmitStreamProcessor
{

public:
    // FIXME: debug
    friend class AmdtpReceiveStreamProcessor;
    
    AmdtpTransmitStreamProcessor(int port, int framerate, int dimension);

    virtual ~AmdtpTransmitStreamProcessor();

    enum raw1394_iso_disposition 
            getPacket(unsigned char *data, unsigned int *length,
                    unsigned char *tag, unsigned char *sy,
                    int cycle, unsigned int dropped, unsigned int max_length);

    bool init();
    bool reset();
    bool prepare();
    
    bool prepareForStop();
    bool prepareForStart();
    
    bool prepareForEnable();
    
    bool canClientTransferFrames(unsigned int nbframes);
    bool putFrames(unsigned int nbframes, int64_t ts); ///< transfer the buffer contents from the client

    // We have 1 period of samples = m_period
    // this period takes m_period/m_framerate seconds of time
    // during this time, 8000 packets are sent
//      unsigned int getPacketsPerPeriod() {return (m_period*8000)/m_framerate;};
    
    // however, if we only count the number of used packets
    // it is m_period / m_syt_interval
    unsigned int getPacketsPerPeriod() {return (m_period)/m_syt_interval;};
    
    unsigned int getMaxPacketSize() {return 4 * (2 + m_syt_interval * m_dimension);}; 
    
    int64_t getTimeUntilNextPeriodUsecs();

    uint64_t getTimeAtPeriodUsecs();
    uint64_t getTimeAtPeriod();
    
    void setVerboseLevel(int l);
    
protected:
    bool processWriteBlock(char *data, unsigned int nevents, unsigned int offset);

    struct iec61883_cip m_cip_status;
    
    int m_dimension;
    unsigned int m_syt_interval;

    int m_fdf;
    
    bool prefill();
    
    bool transferSilence(unsigned int size);

    int transmitBlock(char *data, unsigned int nevents, 
                        unsigned int offset);
                        
    bool encodePacketPorts(quadlet_t *data, unsigned int nevents, unsigned int dbc);
    int encodePortToMBLAEvents(AmdtpAudioPort *, quadlet_t *data,
                                unsigned int offset, unsigned int nevents);
    
    int transmitSilenceBlock(char *data, unsigned int nevents, 
                        unsigned int offset);
    int encodeSilencePortToMBLAEvents(AmdtpAudioPort *, quadlet_t *data,
                                unsigned int offset, unsigned int nevents);

    unsigned long m_last_timestamp;

    unsigned int m_dbc;
    
    unsigned int m_ringbuffer_size_frames;

    DECLARE_DEBUG_MODULE;

};
/*!
\brief The Base Class for an AMDTP receive stream processor

 This class implements a ReceiveStreamProcessor that demultiplexes 
 AMDTP streams into Ports.
 
*/
class AmdtpReceiveStreamProcessor 
        : public ReceiveStreamProcessor
{

public:
    // FIXME: debug
    friend class AmdtpTransmitStreamProcessor;

        AmdtpReceiveStreamProcessor(int port, int framerate, int dimension);

        virtual ~AmdtpReceiveStreamProcessor();

        enum raw1394_iso_disposition putPacket(unsigned char *data, unsigned int length, 
                      unsigned char channel, unsigned char tag, unsigned char sy, 
                          unsigned int cycle, unsigned int dropped);


        bool init();
        bool reset();
        bool prepare();
        
    bool prepareForStop();
    bool prepareForStart();
        
    bool canClientTransferFrames(unsigned int nbframes);
    bool getFrames(unsigned int nbframes); ///< transfer the buffer contents to the client

    // We have 1 period of samples = m_period
    // this period takes m_period/m_framerate seconds of time
    // during this time, 8000 packets are sent
//      unsigned int getPacketsPerPeriod() {return (m_period*8000)/m_framerate;};
    
    // however, if we only count the number of used packets
    // it is m_period / m_syt_interval
        unsigned int getPacketsPerPeriod() {return (m_period)/m_syt_interval;};
        
        unsigned int getMaxPacketSize() {return 4 * (2 + m_syt_interval * m_dimension);}; 

    void dumpInfo();
    
    int64_t getTimeUntilNextPeriodUsecs();

    uint64_t getTimeAtPeriodUsecs();
    uint64_t getTimeAtPeriod();
        
    void setVerboseLevel(int l);
            
protected:

    bool processReadBlock(char *data, unsigned int nevents, unsigned int offset);

    bool decodePacketPorts(quadlet_t *data, unsigned int nevents, unsigned int dbc);
    
    int decodeMBLAEventsToPort(AmdtpAudioPort *, quadlet_t *data, unsigned int offset, unsigned int nevents);

    int m_dimension;
    unsigned int m_syt_interval;
    
    uint64_t m_last_timestamp; /// last timestamp (in ticks)
    uint64_t m_last_timestamp2; /// last timestamp (in ticks)
    uint64_t m_last_timestamp_at_period_ticks;
    
    DECLARE_DEBUG_MODULE;

};


} // end of namespace FreebobStreaming

#endif /* __FREEBOB_AMDTPSTREAMPROCESSOR__ */