root/branches/ppalmers-streaming/src/libstreaming/motu/MotuTransmitStreamProcessor.h

Revision 732, 5.0 kB (checked in by ppalmers, 16 years ago)

reorganize motu SP files to prepare for updated streaming implementation (disfunctional)

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1 /*
2  * Copyright (C) 2005-2007 by Pieter Palmers
3  *
4  * This file is part of FFADO
5  * FFADO = Free Firewire (pro-)audio drivers for linux
6  *
7  * FFADO is based upon FreeBoB.
8  *
9  * This library is free software; you can redistribute it and/or
10  * modify it under the terms of the GNU Lesser General Public
11  * License version 2.1, as published by the Free Software Foundation;
12  *
13  * This library is distributed in the hope that it will be useful,
14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
16  * Lesser General Public License for more details.
17  *
18  * You should have received a copy of the GNU Lesser General Public
19  * License along with this library; if not, write to the Free Software
20  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
21  * MA 02110-1301 USA
22  */
23
24 #ifndef __FFADO_AMDTPTRANSMITSTREAMPROCESSOR__
25 #define __FFADO_AMDTPTRANSMITSTREAMPROCESSOR__
26
27 /**
28  * This class implements IEC61883-6 / AM824 / AMDTP based streaming
29  */
30
31 #include "debugmodule/debugmodule.h"
32
33 #include "../generic/StreamProcessor.h"
34 #include "../util/cip.h"
35
36 #include <libiec61883/iec61883.h>
37 #include <pthread.h>
38
39 #define AMDTP_MAX_PACKET_SIZE 2048
40
41 #define IEC61883_STREAM_TYPE_MIDI   0x0D
42 #define IEC61883_STREAM_TYPE_SPDIF  0x00
43 #define IEC61883_STREAM_TYPE_MBLA   0x06
44
45 #define IEC61883_AM824_LABEL_MASK             0xFF000000
46 #define IEC61883_AM824_GET_LABEL(x)         (((x) & 0xFF000000) >> 24)
47 #define IEC61883_AM824_SET_LABEL(x,y)         ((x) | ((y)<<24))
48
49 #define IEC61883_AM824_LABEL_MIDI_NO_DATA     0x80
50 #define IEC61883_AM824_LABEL_MIDI_1X          0x81
51 #define IEC61883_AM824_LABEL_MIDI_2X          0x82
52 #define IEC61883_AM824_LABEL_MIDI_3X          0x83
53
54 namespace Streaming {
55
56 class Port;
57 class AmdtpAudioPort;
58 class AmdtpMidiPort;
59
60 /*!
61 \brief The Base Class for an AMDTP transmit stream processor
62
63  This class implements a TransmitStreamProcessor that multiplexes Ports
64  into AMDTP streams.
65
66 */
67 class AmdtpTransmitStreamProcessor
68     : public StreamProcessor
69 {
70
71 public:
72     /**
73      * Create a AMDTP transmit StreamProcessor
74      * @param port 1394 port
75      * @param framerate frame rate
76      * @param dimension number of substreams in the ISO stream
77      *                  (midi-muxed is only one stream)
78      */
79     AmdtpTransmitStreamProcessor(int port, int dimension);
80     virtual ~AmdtpTransmitStreamProcessor() {};
81
82     enum eChildReturnValue generatePacketHeader(unsigned char *data, unsigned int *length,
83                               unsigned char *tag, unsigned char *sy,
84                               int cycle, unsigned int dropped, unsigned int max_length);
85     enum eChildReturnValue generatePacketData(unsigned char *data, unsigned int *length,
86                             unsigned char *tag, unsigned char *sy,
87                             int cycle, unsigned int dropped, unsigned int max_length);
88     enum eChildReturnValue generateSilentPacketHeader(unsigned char *data, unsigned int *length,
89                                     unsigned char *tag, unsigned char *sy,
90                                     int cycle, unsigned int dropped, unsigned int max_length);
91     enum eChildReturnValue generateSilentPacketData(unsigned char *data, unsigned int *length,
92                                   unsigned char *tag, unsigned char *sy,
93                                   int cycle, unsigned int dropped, unsigned int max_length);
94     virtual bool prepareChild();
95
96 public:
97     virtual unsigned int getEventSize()
98                     {return 4;};
99     virtual unsigned int getMaxPacketSize()
100                     {return 4 * (2 + m_syt_interval * m_dimension);};
101     virtual unsigned int getEventsPerFrame()
102                     { return m_dimension; };
103     virtual unsigned int getNominalFramesPerPacket()
104                     {return m_syt_interval;};
105     virtual unsigned int getPacketsPerPeriod();
106     virtual unsigned int getNominalPacketsNeeded(unsigned int nframes);
107
108 protected:
109     bool processWriteBlock(char *data, unsigned int nevents, unsigned int offset);
110     bool transmitSilenceBlock(char *data, unsigned int nevents, unsigned int offset);
111
112 private:
113     unsigned int fillNoDataPacketHeader(struct iec61883_packet *packet, unsigned int* length);
114     unsigned int fillDataPacketHeader(struct iec61883_packet *packet, unsigned int* length, uint32_t ts);
115
116     int transmitBlock(char *data, unsigned int nevents,
117                         unsigned int offset);
118
119     bool encodePacketPorts(quadlet_t *data, unsigned int nevents,
120                            unsigned int dbc);
121
122     int encodePortToMBLAEvents(AmdtpAudioPort *, quadlet_t *data,
123                                 unsigned int offset, unsigned int nevents);
124     int encodeSilencePortToMBLAEvents(AmdtpAudioPort *, quadlet_t *data,
125                                 unsigned int offset, unsigned int nevents);
126
127     struct iec61883_cip m_cip_status;
128     int m_dimension;
129     unsigned int m_syt_interval;
130     int m_fdf;
131     unsigned int m_dbc;
132 };
133
134 } // end of namespace Streaming
135
136 #endif /* __FFADO_AMDTPTRANSMITSTREAMPROCESSOR__ */
137
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