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

Revision 402, 6.3 kB (checked in by pieterpalmers, 17 years ago)

adapted the Motu SP to the new stream sync framework

Line 
1 /* $Id$ */
2
3 /*
4  *   FreeBob Streaming API
5  *   FreeBob = Firewire (pro-)audio for linux
6  *
7  *   http://freebob.sf.net
8  *
9  *   Copyright (C) 2005,2006 Pieter Palmers <pieterpalmers@users.sourceforge.net>
10  *
11  *   This program is free software {} you can redistribute it and/or modify
12  *   it under the terms of the GNU General Public License as published by
13  *   the Free Software Foundation {} either version 2 of the License, or
14  *   (at your option) any later version.
15  *
16  *   This program is distributed in the hope that it will be useful,
17  *   but WITHOUT ANY WARRANTY {} without even the implied warranty of
18  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
19  *   GNU General Public License for more details.
20  *
21  *   You should have received a copy of the GNU General Public License
22  *   along with this program {} if not, write to the Free Software
23  *   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
24  *
25  *
26  *
27  */
28 #ifndef __FREEBOB_AMDTPSTREAMPROCESSOR__
29 #define __FREEBOB_AMDTPSTREAMPROCESSOR__
30
31 /**
32  * This class implements IEC61883-6 / AM824 / AMDTP based streaming
33  */
34
35 #include "../debugmodule/debugmodule.h"
36 #include "StreamProcessor.h"
37
38 #include "cip.h"
39 #include <libiec61883/iec61883.h>
40 #include <pthread.h>
41
42 #define AMDTP_MAX_PACKET_SIZE 2048
43
44 #define IEC61883_STREAM_TYPE_MIDI   0x0D
45 #define IEC61883_STREAM_TYPE_SPDIF  0x00
46 #define IEC61883_STREAM_TYPE_MBLA   0x06
47
48 #define IEC61883_AM824_LABEL_MASK                       0xFF000000
49 #define IEC61883_AM824_GET_LABEL(x)             (((x) & 0xFF000000) >> 24)
50 #define IEC61883_AM824_SET_LABEL(x,y)           ((x) | ((y)<<24))
51
52 #define IEC61883_AM824_LABEL_MIDI_NO_DATA       0x80
53 #define IEC61883_AM824_LABEL_MIDI_1X            0x81
54 #define IEC61883_AM824_LABEL_MIDI_2X            0x82
55 #define IEC61883_AM824_LABEL_MIDI_3X            0x83
56
57 namespace FreebobStreaming {
58
59 class Port;
60 class AmdtpAudioPort;
61 class AmdtpMidiPort;
62 class AmdtpReceiveStreamProcessor;
63
64 /*!
65 \brief The Base Class for an AMDTP transmit stream processor
66
67  This class implements a TransmitStreamProcessor that multiplexes Ports
68  into AMDTP streams.
69  
70 */
71 class AmdtpTransmitStreamProcessor
72         : public TransmitStreamProcessor
73 {
74
75 public:
76     AmdtpTransmitStreamProcessor(int port, int framerate, int dimension);
77
78     virtual ~AmdtpTransmitStreamProcessor();
79
80     enum raw1394_iso_disposition
81             getPacket(unsigned char *data, unsigned int *length,
82                     unsigned char *tag, unsigned char *sy,
83                     int cycle, unsigned int dropped, unsigned int max_length);
84
85     bool init();
86     bool reset();
87     bool prepare();
88    
89     bool prepareForStop();
90     bool prepareForStart();
91    
92     bool prepareForEnable(uint64_t time_to_enable_at);
93    
94     bool putFrames(unsigned int nbframes, int64_t ts); ///< transfer the buffer contents from the client
95
96     // We have 1 period of samples = m_period
97     // this period takes m_period/m_framerate seconds of time
98     // during this time, 8000 packets are sent
99 //      unsigned int getPacketsPerPeriod() {return (m_period*8000)/m_framerate;};
100    
101     // however, if we only count the number of used packets
102     // it is m_period / m_syt_interval
103     unsigned int getPacketsPerPeriod() {return (m_period)/m_syt_interval;};
104    
105     unsigned int getMaxPacketSize() {return 4 * (2 + m_syt_interval * m_dimension);};
106    
107     int getMinimalSyncDelay();
108    
109     void setVerboseLevel(int l);
110    
111 protected:
112     bool processWriteBlock(char *data, unsigned int nevents, unsigned int offset);
113
114     struct iec61883_cip m_cip_status;
115    
116     int m_dimension;
117     unsigned int m_syt_interval;
118
119     int m_fdf;
120    
121     bool prefill();
122    
123     bool transferSilence(unsigned int size);
124
125     int transmitBlock(char *data, unsigned int nevents,
126                         unsigned int offset);
127                        
128     bool encodePacketPorts(quadlet_t *data, unsigned int nevents, unsigned int dbc);
129     int encodePortToMBLAEvents(AmdtpAudioPort *, quadlet_t *data,
130                                 unsigned int offset, unsigned int nevents);
131    
132     int transmitSilenceBlock(char *data, unsigned int nevents,
133                         unsigned int offset);
134     int encodeSilencePortToMBLAEvents(AmdtpAudioPort *, quadlet_t *data,
135                                 unsigned int offset, unsigned int nevents);
136
137     unsigned long m_last_timestamp;
138
139     unsigned int m_dbc;
140    
141     unsigned int m_ringbuffer_size_frames;
142
143     DECLARE_DEBUG_MODULE;
144
145 };
146 /*!
147 \brief The Base Class for an AMDTP receive stream processor
148
149  This class implements a ReceiveStreamProcessor that demultiplexes
150  AMDTP streams into Ports.
151  
152 */
153 class AmdtpReceiveStreamProcessor
154         : public ReceiveStreamProcessor
155 {
156
157 public:
158         AmdtpReceiveStreamProcessor(int port, int framerate, int dimension);
159
160         virtual ~AmdtpReceiveStreamProcessor();
161
162         enum raw1394_iso_disposition putPacket(unsigned char *data, unsigned int length,
163                       unsigned char channel, unsigned char tag, unsigned char sy,
164                           unsigned int cycle, unsigned int dropped);
165
166
167         bool init();
168         bool reset();
169         bool prepare();
170        
171     bool prepareForStop();
172     bool prepareForStart();
173        
174     bool getFrames(unsigned int nbframes); ///< transfer the buffer contents to the client
175
176     // We have 1 period of samples = m_period
177     // this period takes m_period/m_framerate seconds of time
178     // during this time, 8000 packets are sent
179 //      unsigned int getPacketsPerPeriod() {return (m_period*8000)/m_framerate;};
180    
181     // however, if we only count the number of used packets
182     // it is m_period / m_syt_interval
183         unsigned int getPacketsPerPeriod() {return (m_period)/m_syt_interval;};
184        
185         unsigned int getMaxPacketSize() {return 4 * (2 + m_syt_interval * m_dimension);};
186
187     void dumpInfo();
188    
189     int getMinimalSyncDelay();
190        
191     void setVerboseLevel(int l);
192            
193 protected:
194
195     bool processReadBlock(char *data, unsigned int nevents, unsigned int offset);
196
197     bool decodePacketPorts(quadlet_t *data, unsigned int nevents, unsigned int dbc);
198    
199     int decodeMBLAEventsToPort(AmdtpAudioPort *, quadlet_t *data, unsigned int offset, unsigned int nevents);
200
201     int m_dimension;
202     unsigned int m_syt_interval;
203    
204     uint64_t m_last_timestamp; /// last timestamp (in ticks)
205     uint64_t m_last_timestamp2; /// last timestamp (in ticks)
206     uint64_t m_last_timestamp_at_period_ticks;
207    
208     DECLARE_DEBUG_MODULE;
209
210 };
211
212
213 } // end of namespace FreebobStreaming
214
215 #endif /* __FREEBOB_AMDTPSTREAMPROCESSOR__ */
216
217
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