summaryrefslogtreecommitdiffstats
path: root/flow/audioiojack.cpp
blob: ca8110a1cf66ba388084314a5b44f9363667c9e4 (plain)
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
/*
    Copyright (C) 2004 Matthias Kretz <kretz@kde.org>

    This library is free software; you can redistribute it and/or
    modify it under the terms of the GNU Library General Public
    License version 2 as published by the Free Software Foundation.

    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., 51 Franklin Street, Fifth Floor,
    Boston, MA 02110-1301, USA.

*/

#ifdef HAVE_CONFIG_H
#include <config.h>
#endif

#ifdef HAVE_LIBJACK

#include <jack/jack.h>
#include <jack/ringbuffer.h>

#include "debug.h"
#include "audioio.h"
#include "audiosubsys.h"
#include "iomanager.h"
#include "dispatcher.h"

#ifndef MIN
#define MIN(a,b)        ((a) < (b) ? (a) : (b))
#endif

#undef DEBUG_WAVEFORM
#ifdef DEBUG_WAVEFORM
#include <fstream>
#endif

#include <cstdlib>
#include <cstring>

namespace Arts {

class AudioIOJack : public AudioIO, public TimeNotify {
private:
#ifdef DEBUG_WAVEFORM
	std::ofstream plotfile;
#endif
	char * processBuffer;
	size_t buffersize;

protected:
	jack_client_t *jack;
	jack_port_t *outleft, *outright;
	jack_port_t *inleft, *inright;
	jack_ringbuffer_t *olb, *orb, *ilb, *irb;

public:
	AudioIOJack();

	void notifyTime();

	void setParam( AudioParam p, int & val );
	int getParam(AudioParam param);

	static int jackCallback( jack_nframes_t, void * );

	bool open();
	void close();
	int read(void *buffer, int size);
	int write(void *buffer, int size);
};

REGISTER_AUDIO_IO(AudioIOJack,"jack","Jack Audio Connection Kit");
}

using namespace std;
using namespace Arts;

AudioIOJack::AudioIOJack()
	:
#ifdef DEBUG_WAVEFORM
	plotfile( "/dev/shm/audioiojack.plot" ),
#endif
	jack( 0 )
	, outleft( 0 )
	, outright( 0 )
	, inleft( 0 )
	, inright( 0 )
{
	/*
	 * default parameters
	 */
	param( samplingRate ) = 44100;
	paramStr( deviceName ) = "jack";
	param( fragmentSize ) = 512;
	param( fragmentCount ) = 2;
	param( channels ) = 2;
	param( direction ) = 2;
	param( format ) = 32;
}

bool AudioIOJack::open()
{
	string& _error = paramStr( lastError );
	jack = jack_client_new( "artsd" );
	if( jack == 0 )
	{
		_error = "Couldn't connect to jackd";
		return false;
	}

	int& _sampleRate = param(samplingRate);
	_sampleRate = jack_get_sample_rate( jack );
	int& _fragmentSize = param(fragmentSize);
	int& _fragmentCount = param(fragmentCount);

	/*
	 * don't allow unreasonable large fragmentSize/Count combinations,
	 * because "real" hardware also doesn't
	 */

	if(_fragmentSize > 1024*8) _fragmentSize = 1024*8;

	while(_fragmentSize * _fragmentCount > 1024*128)
		_fragmentCount--;

	jack_set_process_callback( jack, Arts::AudioIOJack::jackCallback, this );

	if( param( direction ) & directionWrite )
	{
		outleft = jack_port_register( jack, "out_1",
				JACK_DEFAULT_AUDIO_TYPE, JackPortIsOutput, 0 );
		outright = jack_port_register( jack, "out_2",
				JACK_DEFAULT_AUDIO_TYPE, JackPortIsOutput, 0 );
		olb = jack_ringbuffer_create(
				sizeof( jack_default_audio_sample_t ) *
				_fragmentSize * _fragmentCount );
		orb = jack_ringbuffer_create(
				sizeof( jack_default_audio_sample_t ) *
				_fragmentSize * _fragmentCount );
	}
	if( param( direction ) & directionRead )
	{
		inleft = jack_port_register( jack, "in_1",
				JACK_DEFAULT_AUDIO_TYPE, JackPortIsInput, 0 );
		inright = jack_port_register( jack, "in_2",
				JACK_DEFAULT_AUDIO_TYPE, JackPortIsInput, 0 );
		ilb = jack_ringbuffer_create(
				sizeof( jack_default_audio_sample_t ) *
				1024 * 64 );
		irb = jack_ringbuffer_create(
				sizeof( jack_default_audio_sample_t ) *
				1024 * 64 );
	}

	if( jack_activate( jack ) )
	{
		_error = "Activating as jack client failed.";
		return false;
	}

	const char **ports;
	if( param( direction ) & directionRead )
	{
		ports = jack_get_ports( jack, 0, 0, JackPortIsPhysical
				| JackPortIsOutput );
		if( ports == 0 )
		{
			arts_warning( "Cannot find any capture ports to"
					" connect to. You need to manually connect"
					" the capture ports in jack" );
		}
		else
		{
			if( ports[ 0 ] != 0 )
				jack_connect( jack, ports[ 0 ],
						jack_port_name( inleft ) );
			if( ports[ 1 ] != 0 )
				jack_connect( jack, ports[ 1 ],
						jack_port_name( inright ) );
			free( ports );
		}
	}
	if( param( direction ) & directionWrite )
	{
		ports = jack_get_ports( jack, 0, 0, JackPortIsPhysical
				| JackPortIsInput );
		if( ports == 0 )
		{
			arts_warning( "Cannot find any playback ports to"
					" connect to. You need to manually connect"
					" the playback ports in jack" );
		}
		else
		{
			if( ports[ 0 ] != 0 )
				jack_connect( jack, jack_port_name( outleft ),
						ports[ 0 ] );
			if( ports[ 1 ] != 0 )
				jack_connect( jack, jack_port_name( outright ),
						ports[ 1 ] );
			free( ports );
		}
	}

	// Install the timer
	Dispatcher::the()->ioManager()->addTimer(10, this);

	return true;
}

void AudioIOJack::close()
{
	jack_client_close( jack );
    Dispatcher::the()->ioManager()->removeTimer(this);
}

int AudioIOJack::jackCallback( jack_nframes_t nframes, void * args )
{
	AudioIOJack * that = static_cast<AudioIOJack*>( args );

	that->buffersize = nframes * sizeof( jack_default_audio_sample_t );
	if( that->outleft )
	{
		if( jack_ringbuffer_read_space( that->olb ) < that->buffersize )
		{
			that->processBuffer = static_cast<char *>(
					jack_port_get_buffer( that->outleft, nframes ) );
			memset( that->processBuffer, 0, that->buffersize );
			that->processBuffer = static_cast<char *>(
					jack_port_get_buffer( that->outright, nframes ) );
			memset( that->processBuffer, 0, that->buffersize );
		}
		else
		{
			that->processBuffer = static_cast<char *>(
					jack_port_get_buffer( that->outleft, nframes ) );
			jack_ringbuffer_read( that->olb, that->processBuffer, that->buffersize );
			that->processBuffer = static_cast<char *>(
					jack_port_get_buffer( that->outright, nframes ) );
			jack_ringbuffer_read( that->orb, that->processBuffer, that->buffersize );
		}
	}
	if( that->inleft )
	{
		that->processBuffer = static_cast<char *>(
				jack_port_get_buffer( that->inleft, nframes ) );
		jack_ringbuffer_write( that->ilb, that->processBuffer, that->buffersize );
		that->processBuffer = static_cast<char *>(
				jack_port_get_buffer( that->inright, nframes ) );
		jack_ringbuffer_write( that->irb, that->processBuffer, that->buffersize );
	}
	return 0;
}

void AudioIOJack::setParam( AudioParam p, int& val )
{
	// don't change the format - jack only supports 32 bit float
	if( p == format )
		return;
	AudioIO::setParam( p, val );
}

int AudioIOJack::getParam(AudioParam p)
{
	switch(p)
	{
		case canRead:
			return MIN( jack_ringbuffer_read_space( ilb ), jack_ringbuffer_read_space( irb ) ) * param( channels );
		case canWrite:
			return MIN( jack_ringbuffer_write_space( olb ), jack_ringbuffer_write_space( orb ) ) * param( channels );
		default:
			return AudioIO::getParam( p );
	}
}

int AudioIOJack::read(void *buffer, int size)
{
	float * floatbuffer = static_cast<float *>( buffer );
	if( param( channels ) == 2 )
	{
		float * end = ( float * )( static_cast<char *>( buffer ) + size );
		while( floatbuffer < end )
		{
			jack_ringbuffer_read( ilb, ( char* )( floatbuffer++ ), sizeof( float ) );
#ifdef DEBUG_WAVEFORM
			plotfile << *( floatbuffer - 1 ) << "\n";
#endif
			jack_ringbuffer_read( irb, ( char* )( floatbuffer++ ), sizeof( float ) );
		}
	}
	else if( param( channels ) == 1 )
	{
		jack_ringbuffer_read( ilb, ( char* )( floatbuffer ), size );
	}
	return size;
}

int AudioIOJack::write(void *buffer, int size)
{
	float * floatbuffer = static_cast<float *>( buffer );
	if( param( channels ) == 2 )
	{
		float * end = ( float * )( static_cast<char *>( buffer ) + size );
		while( floatbuffer < end )
		{
			jack_ringbuffer_write( olb, ( char* )( floatbuffer++ ), sizeof( float ) );
			jack_ringbuffer_write( orb, ( char* )( floatbuffer++ ), sizeof( float ) );
		}
	}
	else if( param( channels ) == 1 )
	{
		jack_ringbuffer_write( olb, ( char* )( floatbuffer ), size );
	}
	return size;
}

void AudioIOJack::notifyTime()
{
    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 );
	}
}

#endif