root/branches/ppalmers-streaming/src/libstreaming/amdtp/AmdtpStreamProcessor.h

Revision 709, 6.8 kB (checked in by ppalmers, 15 years ago)

some more streaming system updates.
this works with the saffire up till -n2 -p256

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 library is free software; you can redistribute it and/or
10  * modify it under the terms of the GNU Lesser General Public
11  * License version 2.1, as published by the Free Software Foundation;
12  *
13  * This library is distributed in the hope that it will be useful,
14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
16  * Lesser General Public License for more details.
17  *
18  * You should have received a copy of the GNU Lesser General Public
19  * License along with this library; if not, write to the Free Software
20  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
21  * MA 02110-1301 USA
22  */
23
24 #ifndef __FFADO_AMDTPSTREAMPROCESSOR__
25 #define __FFADO_AMDTPSTREAMPROCESSOR__
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 class AmdtpReceiveStreamProcessor;
60
61 /*!
62 \brief The Base Class for an AMDTP transmit stream processor
63
64  This class implements a TransmitStreamProcessor that multiplexes Ports
65  into AMDTP streams.
66
67 */
68 class AmdtpTransmitStreamProcessor
69     : public TransmitStreamProcessor
70 {
71
72 public:
73     /**
74      * Create a AMDTP transmit StreamProcessor
75      * @param port 1394 port
76      * @param framerate frame rate
77      * @param dimension number of substreams in the ISO stream
78      *                  (midi-muxed is only one stream)
79      */
80     AmdtpTransmitStreamProcessor(int port, int framerate, int dimension);
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     bool putFramesDry(unsigned int nbframes, int64_t ts);
99
100     // We have 1 period of samples = m_period
101     // this period takes m_period/m_framerate seconds of time
102     // during this time, 8000 packets are sent
103 //     unsigned int getPacketsPerPeriod() {return (m_period*8000)/m_framerate;};
104
105     // however, if we only count the number of used packets
106     // it is m_period / m_syt_interval
107     unsigned int getPacketsPerPeriod() {return (m_period)/m_syt_interval;};
108
109     unsigned int getMaxPacketSize() {return 4 * (2 + m_syt_interval * m_dimension);};
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     unsigned int fillNoDataPacketHeader(struct iec61883_packet *packet, unsigned int* length);
124     unsigned int fillDataPacketHeader(struct iec61883_packet *packet, unsigned int* length, uint32_t ts);
125
126
127     bool transferSilence(unsigned int size);
128
129     int transmitBlock(char *data, unsigned int nevents,
130                         unsigned int offset);
131
132     bool encodePacketPorts(quadlet_t *data, unsigned int nevents, unsigned int dbc);
133     int encodePortToMBLAEvents(AmdtpAudioPort *, quadlet_t *data,
134                                 unsigned int offset, unsigned int nevents);
135
136     int transmitSilenceBlock(char *data, unsigned int nevents,
137                         unsigned int offset);
138     int encodeSilencePortToMBLAEvents(AmdtpAudioPort *, quadlet_t *data,
139                                 unsigned int offset, unsigned int nevents);
140     void updatePreparedState();
141
142     unsigned long m_last_timestamp;
143
144     unsigned int m_dbc;
145
146     unsigned int m_ringbuffer_size_frames;
147 };
148 /*!
149 \brief The Base Class for an AMDTP receive stream processor
150
151  This class implements a ReceiveStreamProcessor that demultiplexes
152  AMDTP streams into Ports.
153
154 */
155 class AmdtpReceiveStreamProcessor
156     : public ReceiveStreamProcessor
157 {
158
159 public:
160     /**
161      * Create a AMDTP receive StreamProcessor
162      * @param port 1394 port
163      * @param framerate frame rate
164      * @param dimension number of substreams in the ISO stream
165      *                  (midi-muxed is only one stream)
166      */
167     AmdtpReceiveStreamProcessor(int port, int framerate, int dimension);
168     virtual ~AmdtpReceiveStreamProcessor() {};
169
170     enum raw1394_iso_disposition putPacket(unsigned char *data, unsigned int length,
171                   unsigned char channel, unsigned char tag, unsigned char sy,
172                   unsigned int cycle, unsigned int dropped);
173
174
175     bool init();
176     bool reset();
177     bool prepare();
178
179     bool prepareForStop();
180     bool prepareForStart();
181
182     bool getFrames(unsigned int nbframes, int64_t ts); ///< transfer the buffer contents to the client
183     bool getFramesDry(unsigned int nbframes, int64_t ts);
184
185     // We have 1 period of samples = m_period
186     // this period takes m_period/m_framerate seconds of time
187     // during this time, 8000 packets are sent
188 //     unsigned int getPacketsPerPeriod() {return (m_period*8000)/m_framerate;};
189
190     // however, if we only count the number of used packets
191     // it is m_period / m_syt_interval
192     unsigned int getPacketsPerPeriod() {return (m_period)/m_syt_interval;};
193
194     unsigned int getMaxPacketSize() {return 4 * (2 + m_syt_interval * m_dimension);};
195
196     void dumpInfo();
197 protected:
198
199     bool processReadBlock(char *data, unsigned int nevents, unsigned int offset);
200
201     bool decodePacketPorts(quadlet_t *data, unsigned int nevents, unsigned int dbc);
202
203     int decodeMBLAEventsToPort(AmdtpAudioPort *, quadlet_t *data, unsigned int offset, unsigned int nevents);
204     void updatePreparedState();
205
206     int m_dimension;
207     unsigned int m_syt_interval;
208
209     uint64_t m_last_timestamp; /// last timestamp (in ticks)
210     uint64_t m_last_timestamp2; /// last timestamp (in ticks)
211     uint64_t m_last_timestamp_at_period_ticks;
212 };
213
214
215 } // end of namespace Streaming
216
217 #endif /* __FFADO_AMDTPSTREAMPROCESSOR__ */
218
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