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

Revision 401, 6.4 kB (checked in by pieterpalmers, 16 years ago)

move some code from amdtp SP to SP base class

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     // FIXME: debug
77     friend class AmdtpReceiveStreamProcessor;
78    
79     AmdtpTransmitStreamProcessor(int port, int framerate, int dimension);
80
81     virtual ~AmdtpTransmitStreamProcessor();
82
83     enum raw1394_iso_disposition
84             getPacket(unsigned char *data, unsigned int *length,
85                     unsigned char *tag, unsigned char *sy,
86                     int cycle, unsigned int dropped, unsigned int max_length);
87
88     bool init();
89     bool reset();
90     bool prepare();
91    
92     bool prepareForStop();
93     bool prepareForStart();
94    
95     bool prepareForEnable(uint64_t time_to_enable_at);
96    
97     bool putFrames(unsigned int nbframes, int64_t ts); ///< transfer the buffer contents from the client
98
99     // We have 1 period of samples = m_period
100     // this period takes m_period/m_framerate seconds of time
101     // during this time, 8000 packets are sent
102 //      unsigned int getPacketsPerPeriod() {return (m_period*8000)/m_framerate;};
103    
104     // however, if we only count the number of used packets
105     // it is m_period / m_syt_interval
106     unsigned int getPacketsPerPeriod() {return (m_period)/m_syt_interval;};
107    
108     unsigned int getMaxPacketSize() {return 4 * (2 + m_syt_interval * m_dimension);};
109    
110     int getMinimalSyncDelay();
111    
112     void setVerboseLevel(int l);
113    
114 protected:
115     bool processWriteBlock(char *data, unsigned int nevents, unsigned int offset);
116
117     struct iec61883_cip m_cip_status;
118    
119     int m_dimension;
120     unsigned int m_syt_interval;
121
122     int m_fdf;
123    
124     bool prefill();
125    
126     bool transferSilence(unsigned int size);
127
128     int transmitBlock(char *data, unsigned int nevents,
129                         unsigned int offset);
130                        
131     bool encodePacketPorts(quadlet_t *data, unsigned int nevents, unsigned int dbc);
132     int encodePortToMBLAEvents(AmdtpAudioPort *, quadlet_t *data,
133                                 unsigned int offset, unsigned int nevents);
134    
135     int transmitSilenceBlock(char *data, unsigned int nevents,
136                         unsigned int offset);
137     int encodeSilencePortToMBLAEvents(AmdtpAudioPort *, quadlet_t *data,
138                                 unsigned int offset, unsigned int nevents);
139
140     unsigned long m_last_timestamp;
141
142     unsigned int m_dbc;
143    
144     unsigned int m_ringbuffer_size_frames;
145
146     DECLARE_DEBUG_MODULE;
147
148 };
149 /*!
150 \brief The Base Class for an AMDTP receive stream processor
151
152  This class implements a ReceiveStreamProcessor that demultiplexes
153  AMDTP streams into Ports.
154  
155 */
156 class AmdtpReceiveStreamProcessor
157         : public ReceiveStreamProcessor
158 {
159
160 public:
161     // FIXME: debug
162     friend class AmdtpTransmitStreamProcessor;
163
164         AmdtpReceiveStreamProcessor(int port, int framerate, int dimension);
165
166         virtual ~AmdtpReceiveStreamProcessor();
167
168         enum raw1394_iso_disposition putPacket(unsigned char *data, unsigned int length,
169                       unsigned char channel, unsigned char tag, unsigned char sy,
170                           unsigned int cycle, unsigned int dropped);
171
172
173         bool init();
174         bool reset();
175         bool prepare();
176        
177     bool prepareForStop();
178     bool prepareForStart();
179        
180     bool getFrames(unsigned int nbframes); ///< transfer the buffer contents to the client
181
182     // We have 1 period of samples = m_period
183     // this period takes m_period/m_framerate seconds of time
184     // during this time, 8000 packets are sent
185 //      unsigned int getPacketsPerPeriod() {return (m_period*8000)/m_framerate;};
186    
187     // however, if we only count the number of used packets
188     // it is m_period / m_syt_interval
189         unsigned int getPacketsPerPeriod() {return (m_period)/m_syt_interval;};
190        
191         unsigned int getMaxPacketSize() {return 4 * (2 + m_syt_interval * m_dimension);};
192
193     void dumpInfo();
194    
195     int getMinimalSyncDelay();
196        
197     void setVerboseLevel(int l);
198            
199 protected:
200
201     bool processReadBlock(char *data, unsigned int nevents, unsigned int offset);
202
203     bool decodePacketPorts(quadlet_t *data, unsigned int nevents, unsigned int dbc);
204    
205     int decodeMBLAEventsToPort(AmdtpAudioPort *, quadlet_t *data, unsigned int offset, unsigned int nevents);
206
207     int m_dimension;
208     unsigned int m_syt_interval;
209    
210     uint64_t m_last_timestamp; /// last timestamp (in ticks)
211     uint64_t m_last_timestamp2; /// last timestamp (in ticks)
212     uint64_t m_last_timestamp_at_period_ticks;
213    
214     DECLARE_DEBUG_MODULE;
215
216 };
217
218
219 } // end of namespace FreebobStreaming
220
221 #endif /* __FREEBOB_AMDTPSTREAMPROCESSOR__ */
222
223
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