1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
|
/*
Copyright (C) 2001-2003 Stefan Westerfeld
[email protected]
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public
License as published by the Free Software Foundation; either
version 2 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Library General Public License for more details.
You should have received a copy of the GNU Library General Public License
along with this library; see the file COPYING.LIB. If not, write to
the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA.
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
/*
* Only compile this AudioIO class if we have MAS
*/
#ifdef HAVE_LIBMAS
extern "C" {
#include <mas/mas.h>
#include <mas/mas_getset.h>
#include <mas/mas_source.h>
}
#include <sys/types.h>
#include <sys/ioctl.h>
#include <sys/time.h>
#include <sys/stat.h>
#include <assert.h>
#include <errno.h>
#include <fcntl.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <iostream>
#include <algorithm>
#include "debug.h"
#include "audioio.h"
#include "audiosubsys.h"
#include "iomanager.h"
#include "dispatcher.h"
namespace Arts {
class AudioIOMAS : public AudioIO, public TimeNotify {
protected:
mas_channel_t audio_channel;
mas_port_t mix_sink;
mas_port_t srate_source, srate_sink;
mas_port_t audio_source, audio_sink;
mas_port_t endian_sink, endian_source;
mas_port_t sbuf_source, sbuf_sink;
mas_port_t squant_sink, squant_source;
mas_port_t open_source; /* (!) */
mas_device_t endian;
mas_device_t srate;
mas_device_t squant;
mas_device_t sbuf;
mas_data *data;
mas_package package;
int32 mas_error;
std::list<mas_channel_t> allocated_channels;
std::list<mas_port_t> allocated_ports;
std::list<mas_device_t> allocated_devices;
double lastUpdate, bytesPerSec;
int readBufferAvailable;
int writeBufferAvailable;
double currentTime();
void updateBufferSizes();
#ifdef WORDS_BIGENDIAN
static const int defaultFormat = 17;
#else
static const int defaultFormat = 16;
#endif
bool close_with_error(const std::string& text);
public:
AudioIOMAS();
// Timer callback
void notifyTime();
void setParam(AudioParam param, int& value);
int getParam(AudioParam param);
bool open();
void close();
int read(void *buffer, int size);
int write(void *buffer, int size);
};
REGISTER_AUDIO_IO(AudioIOMAS,"mas","MAS Audio Input/Output");
};
using namespace std;
using namespace Arts;
AudioIOMAS::AudioIOMAS()
{
/*
* default parameters
*/
param(samplingRate) = 44100;
paramStr(deviceName) = ""; // TODO
param(fragmentSize) = 4096;
param(fragmentCount) = 7;
param(channels) = 2;
param(direction) = 2;
param(format) = defaultFormat;
}
namespace {
int masInitCount = 0;
}
// Opens the audio device
bool AudioIOMAS::open()
{
string& _error = paramStr(lastError);
string& _deviceName = paramStr(deviceName);
int& _channels = param(channels);
int& _fragmentSize = param(fragmentSize);
int& _fragmentCount = param(fragmentCount);
int& _samplingRate = param(samplingRate);
int& _format = param(format);
/* FIXME: do we need to free what we allocate with mas_init() in close() */
if (!masInitCount)
{
mas_error = mas_init();
if (mas_error < 0)
return close_with_error("error connecting to MAS server");
}
masInitCount++;
if (param(direction) != 2)
{
_error = "unsupported direction (currently no full duplex support)";
return false;
}
/*
* data path
*
* audio_sink
* audio_channel: data_channel ("artsd")
* audio_source
* |
* V
* endian_sink
* endian: instantiate_device ("endian")
* open_source = endian_source
* |
* V
* [squant_sink]
* [squant]
* [squant_source]
* |
* V
* [srate_sink]
* [srate]
* [srate_source]
* |
* V
* sbuf_sink
* sbuf
* sbuf_source
* |
* V
* mix_sink: port ("default_mix_sink")
*/
// audio_channel, source & sink
mas_error = mas_make_data_channel("artsd", &audio_channel, &audio_source, &audio_sink);
if (mas_error < 0)
return close_with_error("error initializing MAS data channel");
allocated_channels.push_back(audio_channel);
allocated_ports.push_back(audio_source);
allocated_ports.push_back(audio_sink);
// endian, source & sink
mas_error = mas_asm_instantiate_device( "endian", 0, 0, &endian );
if ( mas_error < 0 )
return close_with_error("error initantiating MAS endian device");
allocated_devices.push_back(endian);
mas_error = mas_asm_get_port_by_name( endian, "sink", &endian_sink );
if ( mas_error < 0 )
return close_with_error("error getting MAS endian device sink port");
allocated_ports.push_back(endian_sink);
mas_error = mas_asm_get_port_by_name( endian, "source", &endian_source );
if ( mas_error < 0 )
return close_with_error("error getting MAS endian device source port");
allocated_ports.push_back(endian_source);
char ratestring[16], resolutionstring[16];
sprintf (ratestring, "%u", _samplingRate);
sprintf (resolutionstring, "%u", _format);
mas_data_characteristic* dc;
dc = (mas_data_characteristic *)MAS_NEW( dc );
masc_setup_dc( dc, 6 );
masc_append_dc_key_value( dc, "format", (_format==8) ? "ulinear":"linear" );
masc_append_dc_key_value( dc, "resolution", resolutionstring );
masc_append_dc_key_value( dc, "sampling rate", ratestring );
masc_append_dc_key_value( dc, "channels", "2" );
masc_append_dc_key_value( dc, "endian", "little" );
mas_error = mas_asm_connect_source_sink( audio_source, endian_sink, dc );
if ( mas_error < 0 )
return close_with_error("error connecting MAS net audio source to endian sink");
/* The next device is 'if needed' only. After the following if()
statement, open_source will contain the current unconnected
source in the path (will be either endian_source or
squant_source in this case)
*/
open_source = endian_source;
if ( _format != 16 )
{
arts_debug("MAS output: Sample resolution is not 16 bit/sample, instantiating squant device.");
// squant, source & sink
mas_error = mas_asm_instantiate_device( "squant", 0, 0, &squant );
if ( mas_error < 0 )
return close_with_error("error creating MAS squant device");
allocated_devices.push_back(squant);
mas_error = mas_asm_get_port_by_name( squant, "sink", &squant_sink );
if ( mas_error < 0 )
return close_with_error("error getting MAS squant device sink port");
allocated_ports.push_back(squant_sink);
mas_error = mas_asm_get_port_by_name( squant, "source", &squant_source );
if ( mas_error < 0 )
return close_with_error("error getting MAS squant device source port");
allocated_ports.push_back(squant_source);
arts_debug( "MAS output: Connecting endian -> squant.");
masc_strike_dc( dc );
masc_setup_dc( dc, 6 );
masc_append_dc_key_value( dc,"format",(_format==8) ? "ulinear":"linear" );
masc_append_dc_key_value( dc, "resolution", resolutionstring );
masc_append_dc_key_value( dc, "sampling rate", ratestring );
masc_append_dc_key_value( dc, "channels", "2" );
masc_append_dc_key_value( dc, "endian", "host" );
mas_error = mas_asm_connect_source_sink( endian_source, squant_sink, dc );
if ( mas_error < 0 )
return close_with_error("error connecting MAS endian output to squant device");
/* sneaky: the squant device is optional -> pretend it isn't there */
open_source = squant_source;
}
/* Another 'if necessary' device, as above */
if ( _samplingRate != 44100 )
{
arts_debug ("MAS output: Sample rate is not 44100, instantiating srate device.");
// srate, source & sink
mas_error = mas_asm_instantiate_device( "srate", 0, 0, &srate );
if ( mas_error < 0 )
return close_with_error("error initantiating MAS srate device");
allocated_devices.push_back(srate);
mas_error = mas_asm_get_port_by_name( srate, "sink", &srate_sink );
if ( mas_error < 0 )
return close_with_error("error getting MAS srate sink port");
allocated_ports.push_back(srate_sink);
mas_error = mas_asm_get_port_by_name( srate, "source", &srate_source );
if ( mas_error < 0 )
return close_with_error("error getting MAS srate source port");
allocated_ports.push_back(srate_source);
arts_debug( "MAS output: Connecting to srate.");
masc_strike_dc( dc );
masc_setup_dc( dc, 6 );
masc_append_dc_key_value( dc, "format", "linear" );
masc_append_dc_key_value( dc, "resolution", "16" );
masc_append_dc_key_value( dc, "sampling rate", ratestring );
masc_append_dc_key_value( dc, "channels", "2" );
masc_append_dc_key_value( dc, "endian", "host" );
mas_error = mas_asm_connect_source_sink( open_source, srate_sink, dc );
if ( mas_error < 0 )
return close_with_error("error connecting to MAS srate device");
open_source = srate_source;
}
// sbuf, source & sink
mas_error = mas_asm_instantiate_device( "sbuf", 0, 0, &sbuf );
if ( mas_error < 0 )
return close_with_error("error initantiating MAS sbuf device");
allocated_devices.push_back(sbuf);
mas_error = mas_asm_get_port_by_name( sbuf, "sink", &sbuf_sink );
if ( mas_error < 0 )
return close_with_error("error getting MAS sbuf device sink port");
allocated_ports.push_back(sbuf_sink);
mas_error = mas_asm_get_port_by_name( sbuf, "source", &sbuf_source );
if ( mas_error < 0 )
return close_with_error("error getting MAS sbuf device source port");
allocated_ports.push_back(sbuf_source);
masc_strike_dc( dc );
masc_setup_dc( dc, 6 );
masc_append_dc_key_value( dc, "format", "linear" );
masc_append_dc_key_value( dc, "resolution", "16" );
masc_append_dc_key_value( dc, "sampling rate", "44100" );
masc_append_dc_key_value( dc, "channels", "2" );
masc_append_dc_key_value( dc, "endian", "host" );
arts_debug("MAS output: Connecting to sbuf.");
mas_error = mas_asm_connect_source_sink( open_source, sbuf_sink, dc );
if ( mas_error < 0 )
return close_with_error("error connecting to MAS mixer device");
/* configure sbuf */
float BUFTIME_MS = _fragmentSize * _fragmentCount;
BUFTIME_MS *= 1000.0;
BUFTIME_MS /= (float)_channels;
if (_format > 8)
BUFTIME_MS /= 2.0;
BUFTIME_MS /= (float)_samplingRate;
arts_debug("MAS output: BUFTIME_MS = %f", BUFTIME_MS);
masc_setup_package( &package, NULL, 0, 0 );
masc_pushk_uint32( &package, "buftime_ms", (uint32) BUFTIME_MS );
masc_finalize_package( &package );
mas_set( sbuf, "buftime_ms", &package );
masc_strike_package( &package );
masc_setup_package( &package, NULL, 0, 0 );
masc_pushk_int32( &package, "mc_clkid", 9 );
masc_finalize_package( &package );
mas_set( sbuf, "mc_clkid", &package );
masc_strike_package( &package );
mas_source_play( sbuf );
// mix_sink
mas_error = mas_asm_get_port_by_name( 0, "default_mix_sink", &mix_sink );
if (mas_error < 0)
return close_with_error("error finding MAS default sink");
allocated_ports.push_back(mix_sink);
arts_debug("MAS output: Connecting sbuf to mix_sink.");
mas_error = mas_asm_connect_source_sink( sbuf_source, mix_sink, dc );
if ( mas_error < 0 )
return close_with_error("error connecting to MAS mixer device");
data = (mas_data *)MAS_NEW( data );
masc_setup_data( data, _fragmentSize ); /* we can reuse this */
data->length = _fragmentSize;
data->allocated_length = data->length;
data->header.type = 10;
arts_debug("MAS output: playing.");
// Install the timer
Dispatcher::the()->ioManager()->addTimer(10, this);
bytesPerSec = _channels * _samplingRate;
if (_format > 8)
bytesPerSec *= 2;
lastUpdate = 0;
return true;
}
double AudioIOMAS::currentTime()
{
timeval tv;
gettimeofday(&tv,0);
return (double)tv.tv_sec + (double)tv.tv_usec/1000000.0;
}
bool AudioIOMAS::close_with_error(const string& text)
{
string& error = paramStr(lastError);
error = text;
error += masc_strmerror (mas_error);
return false;
}
void AudioIOMAS::close()
{
list<mas_port_t>::iterator pi;
for (pi = allocated_ports.begin(); pi != allocated_ports.end(); pi++)
mas_free_port (*pi);
allocated_ports.clear();
list<mas_channel_t>::iterator ci;
for (ci = allocated_channels.begin(); ci != allocated_channels.end(); ci++)
mas_free_channel (*ci);
allocated_channels.clear();
list<mas_device_t>::iterator di;
for (di = allocated_devices.begin(); di != allocated_devices.end(); di++)
{
mas_device_t device = *di;
mas_error = mas_asm_terminate_device_instance(device, 0);
if (mas_error < 0)
arts_warning ("MAS output: error while closing device: %s", masc_strmerror(mas_error));
mas_free_device(device);
}
allocated_devices.clear();
Dispatcher::the()->ioManager()->removeTimer(this);
}
void AudioIOMAS::updateBufferSizes()
{
double time = currentTime();
double waterMark = param(fragmentSize);
waterMark *= 1.3;
if ((time - lastUpdate) * bytesPerSec < waterMark)
return;
lastUpdate = time;
uint32 inbuf_ms;
int32 mas_error;
mas_error = mas_get( sbuf, "inbuf_ms", 0 , &package );
if ( mas_error < 0 )
arts_fatal ("MAS output: error getting size of buffer: %s", masc_strmerror(mas_error));
masc_pull_uint32( &package, &inbuf_ms );
masc_strike_package( &package );
//arts_debug(" inbuf_ms = %u", inbuf_ms);
float bytes = inbuf_ms;
bytes /= 1000.0;
bytes *= param(samplingRate);
bytes *= param(channels);
if(param(format) > 8)
bytes *= 2;
int bytesFree = param(fragmentSize) * param(fragmentCount) - (int)bytes;
if (bytesFree < param(fragmentSize))
bytesFree = 0;
writeBufferAvailable = bytesFree;
arts_debug ("MAS output buffer: %6d / %6d bytes used => %6d bytes free",
(int)bytes, param(fragmentSize) * param(fragmentCount), writeBufferAvailable);
}
// This is called on each timer tick
void AudioIOMAS::notifyTime()
{
updateBufferSizes();
int& _direction = param(direction);
int& _fragmentSize = param(fragmentSize);
for (;;) {
int todo = 0;
if ((_direction & directionRead) && (getParam(canRead) >= _fragmentSize))
todo |= AudioSubSystem::ioRead;
if ((_direction & directionWrite) && (getParam(canWrite) >= _fragmentSize))
todo |= AudioSubSystem::ioWrite;
if (!todo)
return;
AudioSubSystem::the()->handleIO(todo);
}
}
void AudioIOMAS::setParam(AudioParam p, int& value)
{
switch(p) {
#if 0
case fragmentSize:
param(p) = requestedFragmentSize = value;
break;
case fragmentCount:
param(p) = requestedFragmentCount = value;
break;
#endif
default:
param(p) = value;
break;
}
}
int AudioIOMAS::getParam(AudioParam p)
{
int bytes;
int count;
switch(p)
{
#if 0
case canRead:
if (ioctl(audio_fd, AUDIO_GETINFO, &auinfo) < 0)
return (0);
bytes = (auinfo.record.samples * bytesPerSample) - bytesRead;
if (bytes < 0) {
printf("Error: bytes %d < 0, samples=%u, bytesRead=%u\n",
bytes, auinfo.record.samples, bytesRead);
bytes = 0;
}
return bytes;
case canWrite:
if (ioctl(audio_fd, AUDIO_GETINFO, &auinfo) < 0)
return (0);
count = SUN_MAX_BUFFER_SIZE -
(bytesWritten - (auinfo.play.samples * bytesPerSample));
return count;
#endif
case canWrite:
return writeBufferAvailable;
case autoDetect:
/*
* Fairly small priority, for we haven't tested this a lot
*/
return 3;
default:
return param(p);
}
}
int AudioIOMAS::read(void *buffer, int size)
{
#if 0
size = ::read(audio_fd, buffer, size);
if (size < 0)
return 0;
bytesRead += size;
return size;
#endif
return 0;
}
int AudioIOMAS::write(void *buffer, int size)
{
static int ts = 0;
static int seq = 0;
data->header.sequence = seq++;
data->header.media_timestamp = ts;
ts += size / 4;
assert(size == data->length);
memcpy(data->segment, buffer, size);
int32 mas_error = mas_send( audio_channel , data );
if (mas_error < 0)
arts_fatal ("MAS output: problem during mas_send: %s", masc_strmerror(mas_error));
writeBufferAvailable -= size;
return size;
}
#endif /* HAVE_LIBMAS */
|