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

Revision 742, 4.8 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

Line 
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_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
106 protected:
107     bool processWriteBlock(char *data, unsigned int nevents, unsigned int offset);
108     bool transmitSilenceBlock(char *data, unsigned int nevents, unsigned int offset);
109
110 private:
111     unsigned int fillNoDataPacketHeader(struct iec61883_packet *packet, unsigned int* length);
112     unsigned int fillDataPacketHeader(struct iec61883_packet *packet, unsigned int* length, uint32_t ts);
113
114     int transmitBlock(char *data, unsigned int nevents,
115                         unsigned int offset);
116
117     bool encodePacketPorts(quadlet_t *data, unsigned int nevents,
118                            unsigned int dbc);
119
120     int encodePortToMBLAEvents(AmdtpAudioPort *, quadlet_t *data,
121                                 unsigned int offset, unsigned int nevents);
122     int encodeSilencePortToMBLAEvents(AmdtpAudioPort *, quadlet_t *data,
123                                 unsigned int offset, unsigned int nevents);
124
125     struct iec61883_cip m_cip_status;
126     int m_dimension;
127     unsigned int m_syt_interval;
128     int m_fdf;
129     unsigned int m_dbc;
130 };
131
132 } // end of namespace Streaming
133
134 #endif /* __FFADO_AMDTPTRANSMITSTREAMPROCESSOR__ */
135
Note: See TracBrowser for help on using the browser.