root/trunk/libffado/src/libstreaming/amdtp/AmdtpReceiveStreamProcessor.h

Revision 742, 3.6 kB (checked in by ppalmers, 13 years ago)

- Remove some obsolete support files and dirs

- Clean up the license statements in the source files. Everything is

GPL version 3 now.

- Add license and copyright notices to scons scripts

- Clean up some other text files

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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 program is free software: you can redistribute it and/or modify
10  * it under the terms of the GNU General Public License as published by
11  * the Free Software Foundation, either version 3 of the License, or
12  * (at your option) any later version.
13  *
14  * This program is distributed in the hope that it will be useful,
15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
17  * GNU General Public License for more details.
18  *
19  * You should have received a copy of the GNU General Public License
20  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
21  *
22  */
23
24 #ifndef __FFADO_AMDTPRECEIVESTREAMPROCESSOR__
25 #define __FFADO_AMDTPRECEIVESTREAMPROCESSOR__
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 \brief The Base Class for an AMDTP receive stream processor
61
62  This class implements a ReceiveStreamProcessor that demultiplexes
63  AMDTP streams into Ports.
64
65 */
66 class AmdtpReceiveStreamProcessor
67     : public StreamProcessor
68 {
69
70 public:
71     /**
72      * Create a AMDTP receive StreamProcessor
73      * @param port 1394 port
74      * @param dimension number of substreams in the ISO stream
75      *                  (midi-muxed is only one stream)
76      */
77     AmdtpReceiveStreamProcessor(int port, int dimension);
78     virtual ~AmdtpReceiveStreamProcessor() {};
79
80     enum eChildReturnValue processPacketHeader(unsigned char *data, unsigned int length,
81                   unsigned char channel, unsigned char tag, unsigned char sy,
82                   unsigned int cycle, unsigned int dropped);
83     enum eChildReturnValue processPacketData(unsigned char *data, unsigned int length,
84                   unsigned char channel, unsigned char tag, unsigned char sy,
85                   unsigned int cycle, unsigned int dropped);
86
87     virtual bool prepareChild();
88
89 public:
90     virtual unsigned int getEventSize()
91                     {return 4;};
92     virtual unsigned int getMaxPacketSize()
93                     {return 4 * (2 + m_syt_interval * m_dimension);};
94     virtual unsigned int getEventsPerFrame()
95                     { return m_dimension; };
96     virtual unsigned int getNominalFramesPerPacket()
97                     {return m_syt_interval;};
98
99 protected:
100     bool processReadBlock(char *data, unsigned int nevents, unsigned int offset);
101
102 private:
103     bool decodePacketPorts(quadlet_t *data, unsigned int nevents, unsigned int dbc);
104     int decodeMBLAEventsToPort(AmdtpAudioPort *, quadlet_t *data, unsigned int offset, unsigned int nevents);
105
106     int m_dimension;
107     unsigned int m_syt_interval;
108 };
109
110
111 } // end of namespace Streaming
112
113 #endif /* __FFADO_AMDTPRECEIVESTREAMPROCESSOR__ */
114
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