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

Revision 1498, 4.3 kB (checked in by ppalmers, 15 years ago)

Merge all changes from 2.0 branch into trunk (since r1361). This _should_ contain all forward merges done in the mean time. At this moment in time both branches should be in sync.

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1 /*
2  * Copyright (C) 2005-2008 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 2 of the License, or
12  * (at your option) version 3 of the License.
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(FFADODevice &parent, int dimension);
78     virtual ~AmdtpReceiveStreamProcessor() {};
79
80     enum eChildReturnValue processPacketHeader(unsigned char *data, unsigned int length,
81                                                unsigned char tag, unsigned char sy,
82                                                uint32_t pkt_ctr);
83     enum eChildReturnValue processPacketData(unsigned char *data, unsigned int length);
84
85     virtual bool prepareChild();
86
87 public:
88     virtual unsigned int getEventSize()
89                     {return 4;};
90     virtual unsigned int getMaxPacketSize()
91                     {return 4 * (2 + getSytInterval() * m_dimension);};
92     virtual unsigned int getEventsPerFrame()
93                     { return m_dimension; };
94     virtual unsigned int getNominalFramesPerPacket()
95                     {return getSytInterval();};
96
97 protected:
98     bool processReadBlock(char *data, unsigned int nevents, unsigned int offset);
99
100 private:
101     void decodeAudioPortsFloat(quadlet_t *data, unsigned int offset, unsigned int nevents);
102     void decodeAudioPortsInt24(quadlet_t *data, unsigned int offset, unsigned int nevents);
103     void decodeMidiPorts(quadlet_t *data, unsigned int offset, unsigned int nevents);
104
105     unsigned int getSytInterval();
106
107     int m_dimension;
108     unsigned int m_syt_interval;
109
110 private: // local port caching for performance
111     struct _MBLA_port_cache {
112         AmdtpAudioPort*     port;
113         void*               buffer;
114         bool                enabled;
115 #ifdef DEBUG
116         unsigned int        buffer_size;
117 #endif
118     };
119     std::vector<struct _MBLA_port_cache> m_audio_ports;
120     unsigned int m_nb_audio_ports;
121
122     struct _MIDI_port_cache {
123         AmdtpMidiPort*      port;
124         void*               buffer;
125         bool                enabled;
126         unsigned int        position;
127         unsigned int        location;
128 #ifdef DEBUG
129         unsigned int        buffer_size;
130 #endif
131     };
132     std::vector<struct _MIDI_port_cache> m_midi_ports;
133     unsigned int m_nb_midi_ports;
134
135     bool initPortCache();
136     void updatePortCache();
137 };
138
139
140 } // end of namespace Streaming
141
142 #endif /* __FFADO_AMDTPRECEIVESTREAMPROCESSOR__ */
143
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