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

Revision 1021, 6.4 kB (checked in by ppalmers, 13 years ago)

Allow to disable sending payload on no-data packets though config.h.in. The DICE-II devices cannot cope with them.

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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_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(FFADODevice &parent, 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 generateEmptyPacketHeader(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 generateEmptyPacketData(unsigned char *data, unsigned int *length,
92                                   unsigned char *tag, unsigned char *sy,
93                                   int cycle, unsigned int dropped, unsigned int max_length);
94     enum eChildReturnValue generateSilentPacketHeader(unsigned char *data, unsigned int *length,
95                                     unsigned char *tag, unsigned char *sy,
96                                     int cycle, unsigned int dropped, unsigned int max_length);
97     enum eChildReturnValue generateSilentPacketData(unsigned char *data, unsigned int *length,
98                                   unsigned char *tag, unsigned char *sy,
99                                   int cycle, unsigned int dropped, unsigned int max_length);
100     virtual bool prepareChild();
101
102 #if AMDTP_ALLOW_PAYLOAD_IN_NODATA_XMIT
103 public:
104     void sendPayloadForNoDataPackets(bool b) {m_send_nodata_payload = b;};
105 #endif
106
107 public:
108     virtual unsigned int getEventSize()
109                     {return 4;};
110     virtual unsigned int getMaxPacketSize()
111                     {return 4 * (2 + getSytInterval() * m_dimension);};
112     virtual unsigned int getEventsPerFrame()
113                     { return m_dimension; };
114     virtual unsigned int getNominalFramesPerPacket()
115                     {return getSytInterval();};
116
117 protected:
118     bool processWriteBlock(char *data, unsigned int nevents, unsigned int offset);
119     bool transmitSilenceBlock(char *data, unsigned int nevents, unsigned int offset);
120
121 private:
122     unsigned int fillNoDataPacketHeader(struct iec61883_packet *packet, unsigned int* length);
123     unsigned int fillDataPacketHeader(struct iec61883_packet *packet, unsigned int* length, uint32_t ts);
124
125     int transmitBlock(char *data, unsigned int nevents,
126                         unsigned int offset);
127
128     void encodeAudioPortsSilence(quadlet_t *data, unsigned int offset, unsigned int nevents);
129     void encodeAudioPortsFloat(quadlet_t *data, unsigned int offset, unsigned int nevents);
130     void encodeAudioPortsInt24(quadlet_t *data, unsigned int offset, unsigned int nevents);
131     void encodeMidiPortsSilence(quadlet_t *data, unsigned int offset, unsigned int nevents);
132     void encodeMidiPorts(quadlet_t *data, unsigned int offset, unsigned int nevents);
133
134     unsigned int getFDF();
135     unsigned int getSytInterval();
136
137     struct iec61883_cip m_cip_status;
138     int m_dimension;
139     unsigned int m_syt_interval;
140     int m_fdf;
141     unsigned int m_dbc;
142
143 #if AMDTP_ALLOW_PAYLOAD_IN_NODATA_XMIT
144 private:
145     bool m_send_nodata_payload;
146 #endif
147
148 private: // local port caching for performance
149     struct _MBLA_port_cache {
150         AmdtpAudioPort*     port;
151         void*               buffer;
152         bool                enabled;
153 #ifdef DEBUG
154         unsigned int        buffer_size;
155 #endif
156     };
157     std::vector<struct _MBLA_port_cache> m_audio_ports;
158     unsigned int m_nb_audio_ports;
159
160     struct _MIDI_port_cache {
161         AmdtpMidiPort*      port;
162         void*               buffer;
163         bool                enabled;
164         unsigned int        position;
165         unsigned int        location;
166 #ifdef DEBUG
167         unsigned int        buffer_size;
168 #endif
169     };
170     std::vector<struct _MIDI_port_cache> m_midi_ports;
171     unsigned int m_nb_midi_ports;
172
173     bool initPortCache();
174     void updatePortCache();
175 };
176
177 } // end of namespace Streaming
178
179 #endif /* __FFADO_AMDTPTRANSMITSTREAMPROCESSOR__ */
180
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