1 /*****************************************************************************
2 * jack.c: JACK audio input module
3 *****************************************************************************
4 * Copyright (C) 2007-2008 VLC authors and VideoLAN
5 * Copyright (C) 2007 Société des arts technologiques
6 * Copyright (C) 2007 Savoir-faire Linux
8 * Authors: Arnaud Sala <arnaud.sala at savoirfairelinux.com>
9 * Julien Plissonneau Duquene <... at savoirfairelinux.com>
10 * Pierre-Luc Beaudoin <pierre-luc.beaudoin at savoirfairelinux.com>
12 * This program is free software; you can redistribute it and/or modify it
13 * under the terms of the GNU Lesser General Public License as published by
14 * the Free Software Foundation; either version 2.1 of the License, or
15 * (at your option) any later version.
17 * This program is distributed in the hope that it will be useful,
18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 * GNU Lesser General Public License for more details.
22 * You should have received a copy of the GNU Lesser General Public License
23 * along with this program; if not, write to the Free Software Foundation,
24 * Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
25 *****************************************************************************/
28 * \file modules/access/jack.c
29 * \brief JACK audio input functions
32 /*****************************************************************************
34 *****************************************************************************/
40 #include <vlc_common.h>
41 #include <vlc_plugin.h>
42 #include <vlc_input.h>
43 #include <vlc_demux.h>
45 #include <vlc_strings.h>
47 #include <jack/jack.h>
48 #include <jack/ringbuffer.h>
50 #include <sys/types.h>
53 /*****************************************************************************
55 *****************************************************************************/
56 static int Open ( vlc_object_t
* );
57 static void Close( vlc_object_t
* );
59 #define PACE_TEXT N_( "Pace" )
60 #define PACE_LONGTEXT N_( \
61 "Read the audio stream at VLC pace rather than Jack pace." )
62 #define AUTO_CONNECT_TEXT N_( "Auto connection" )
63 #define AUTO_CONNECT_LONGTEXT N_( \
64 "Automatically connect VLC input ports to available output ports." )
67 set_description( N_("JACK audio input") )
68 set_capability( "access_demux", 0 )
69 set_shortname( N_( "JACK Input" ) )
70 set_category( CAT_INPUT
)
71 set_subcategory( SUBCAT_INPUT_ACCESS
)
73 add_bool( "jack-input-use-vlc-pace", false,
74 PACE_TEXT
, PACE_LONGTEXT
, true )
75 add_bool( "jack-input-auto-connect", false,
76 AUTO_CONNECT_TEXT
, AUTO_CONNECT_LONGTEXT
, false )
78 add_shortcut( "jack" )
79 set_callbacks( Open
, Close
)
82 /*****************************************************************************
84 *****************************************************************************/
88 /* Audio properties */
89 vlc_fourcc_t i_acodec_raw
;
90 unsigned int i_channels
;
92 int i_audio_max_frame_size
;
94 block_t
*p_block_audio
;
95 es_out_id_t
*p_es_audio
;
99 jack_client_t
*p_jack_client
;
100 jack_port_t
**pp_jack_port_input
;
101 jack_default_audio_sample_t
**pp_jack_buffer
;
102 jack_ringbuffer_t
*p_jack_ringbuffer
;
103 jack_nframes_t jack_buffer_size
;
104 jack_nframes_t jack_sample_rate
;
105 size_t jack_sample_size
;
107 char **pp_jack_port_table
;
111 static int Demux( demux_t
* );
112 static int Control( demux_t
*p_demux
, int i_query
, va_list args
);
114 static void Parse ( demux_t
* );
115 static void Port_finder( demux_t
* );
116 static int Process( jack_nframes_t i_frames
, void *p_arg
);
118 static block_t
*GrabJack( demux_t
* );
120 /*****************************************************************************
121 * Open: Connect to the JACK server
122 *****************************************************************************/
123 static int Open( vlc_object_t
*p_this
)
125 demux_t
*p_demux
= ( demux_t
* )p_this
;
130 p_demux
->pf_demux
= Demux
;
131 p_demux
->pf_control
= Control
;
133 /* Allocate structure */
134 p_demux
->p_sys
= p_sys
= vlc_obj_calloc( p_this
, 1, sizeof( demux_sys_t
) );
142 var_Create( p_demux
, "jack-input-use-vlc-pace",
143 VLC_VAR_BOOL
| VLC_VAR_DOINHERIT
);
144 var_Create( p_demux
, "jack-input-auto-connect",
145 VLC_VAR_BOOL
| VLC_VAR_DOINHERIT
);
147 /* JACK connexions */
148 /* define name and connect to jack server */
149 char p_vlc_client_name
[32];
150 sprintf( p_vlc_client_name
, "vlc-input-%d", getpid() );
151 p_sys
->p_jack_client
= jack_client_open( p_vlc_client_name
, JackNullOption
, NULL
);
152 if( p_sys
->p_jack_client
== NULL
)
154 msg_Err( p_demux
, "failed to connect to JACK server" );
158 /* find some specifics ports if user entered a regexp */
159 if( p_sys
->psz_ports
)
161 Port_finder( p_demux
);
162 if( p_sys
->i_channels
== 0 )
164 p_sys
->i_channels
= p_sys
->i_match_ports
;
168 /* allocate input ports */
169 if( p_sys
->i_channels
== 0 ) p_sys
->i_channels
= 2 ; /* default number of port */
170 p_sys
->pp_jack_port_input
= malloc(
171 p_sys
->i_channels
* sizeof( jack_port_t
* ) );
172 if( p_sys
->pp_jack_port_input
== NULL
)
174 jack_client_close( p_sys
->p_jack_client
);
178 /* allocate ringbuffer */
179 /* The length of the ringbuffer is critical, it must be large enought
180 to keep all data between 2 GrabJack() calls. We assume 1 sec is ok */
181 p_sys
->p_jack_ringbuffer
= jack_ringbuffer_create( p_sys
->i_channels
182 * jack_get_sample_rate( p_sys
->p_jack_client
)
183 * sizeof( jack_default_audio_sample_t
) );
184 if( p_sys
->p_jack_ringbuffer
== NULL
)
186 free( p_sys
->pp_jack_port_input
);
187 jack_client_close( p_sys
->p_jack_client
);
191 /* register input ports */
192 for( unsigned i
= 0; i
< p_sys
->i_channels
; i
++ )
194 char p_input_name
[32];
195 snprintf( p_input_name
, 32, "vlc_in_%d", i
+1 );
196 p_sys
->pp_jack_port_input
[i
] = jack_port_register(
197 p_sys
->p_jack_client
, p_input_name
, JACK_DEFAULT_AUDIO_TYPE
,
198 JackPortIsInput
, 0 );
199 if( p_sys
->pp_jack_port_input
[i
] == NULL
)
201 msg_Err( p_demux
, "failed to register a JACK port" );
202 jack_ringbuffer_free( p_sys
->p_jack_ringbuffer
);
203 free( p_sys
->pp_jack_port_input
);
204 jack_client_close( p_sys
->p_jack_client
);
209 /* allocate buffer for input ports */
210 p_sys
->pp_jack_buffer
= malloc ( p_sys
->i_channels
211 * sizeof( jack_default_audio_sample_t
* ) );
212 if( p_sys
->pp_jack_buffer
== NULL
)
214 for( unsigned i
= 0; i
< p_sys
->i_channels
; i
++ )
215 jack_port_unregister( p_sys
->p_jack_client
, p_sys
->pp_jack_port_input
[i
] );
216 jack_ringbuffer_free( p_sys
->p_jack_ringbuffer
);
217 free( p_sys
->pp_jack_port_input
);
218 jack_client_close( p_sys
->p_jack_client
);
222 /* set process callback */
223 jack_set_process_callback( p_sys
->p_jack_client
, Process
, p_demux
);
225 /* tell jack server we are ready */
226 if ( jack_activate( p_sys
->p_jack_client
) )
228 msg_Err( p_demux
, "failed to activate JACK client" );
229 free( p_sys
->pp_jack_buffer
);
230 for( unsigned i
= 0; i
< p_sys
->i_channels
; i
++ )
231 jack_port_unregister( p_sys
->p_jack_client
, p_sys
->pp_jack_port_input
[i
] );
232 jack_ringbuffer_free( p_sys
->p_jack_ringbuffer
);
233 free( p_sys
->pp_jack_port_input
);
234 jack_client_close( p_sys
->p_jack_client
);
238 /* connect vlc input to specifics jack output ports if requested */
239 /* if( var_GetBool( p_demux, "jack-input-auto-connect" ) && p_sys->psz_ports ) */
240 if( p_sys
->psz_ports
)
242 for( int j
= 0; j
< p_sys
->i_match_ports
; j
++ )
244 int i_input_ports
= j
% p_sys
->i_channels
;
245 jack_connect( p_sys
->p_jack_client
, p_sys
->pp_jack_port_table
[j
],
246 jack_port_name( p_sys
->pp_jack_port_input
[i_input_ports
] ) );
250 /* connect vlc input to all jack output ports if requested */
251 if( var_GetBool( p_demux
, "jack-input-auto-connect" ) && !p_sys
->psz_ports
)
253 const char **pp_jack_port_output
= jack_get_ports( p_sys
->p_jack_client
,
254 NULL
, NULL
, JackPortIsOutput
);
256 while( pp_jack_port_output
&& pp_jack_port_output
[i_out_ports
] )
261 for( int j
= 0; j
< i_out_ports
; j
++ )
263 int i_input_ports
= j
% p_sys
->i_channels
;
264 jack_connect( p_sys
->p_jack_client
, pp_jack_port_output
[j
],
265 jack_port_name( p_sys
->pp_jack_port_input
[i_input_ports
] ) );
268 free( pp_jack_port_output
);
271 /* info about jack server */
272 /* get buffers size */
273 p_sys
->jack_buffer_size
= jack_get_buffer_size( p_sys
->p_jack_client
);
274 /* get sample rate */
275 p_sys
->jack_sample_rate
= jack_get_sample_rate( p_sys
->p_jack_client
);
276 /* get sample size */
277 p_sys
->jack_sample_size
= sizeof( jack_default_audio_sample_t
);
279 /* Define output format */
280 es_format_Init( &fmt
, AUDIO_ES
, VLC_CODEC_FL32
);
281 fmt
.audio
.i_channels
= p_sys
->i_channels
;
282 fmt
.audio
.i_rate
= p_sys
->jack_sample_rate
;
283 fmt
.audio
.i_bitspersample
= p_sys
->jack_sample_size
* 8;
284 fmt
.audio
.i_blockalign
= fmt
.audio
.i_bitspersample
/ 8;
285 fmt
.i_bitrate
= fmt
.audio
.i_rate
* fmt
.audio
.i_bitspersample
286 * fmt
.audio
.i_channels
;
288 p_sys
->p_es_audio
= es_out_Add( p_demux
->out
, &fmt
);
289 date_Init( &p_sys
->pts
, fmt
.audio
.i_rate
, 1 );
290 date_Set( &p_sys
->pts
, 1 );
296 /*****************************************************************************
297 * Close: Disconnect from jack server and release associated resources
298 *****************************************************************************/
299 static void Close( vlc_object_t
*p_this
)
301 demux_t
*p_demux
= ( demux_t
* )p_this
;
302 demux_sys_t
*p_sys
= p_demux
->p_sys
;
304 msg_Dbg( p_demux
,"Module unloaded" );
305 if( p_sys
->p_block_audio
) block_Release( p_sys
->p_block_audio
);
306 if( p_sys
->p_jack_client
) jack_client_close( p_sys
->p_jack_client
);
307 if( p_sys
->p_jack_ringbuffer
) jack_ringbuffer_free( p_sys
->p_jack_ringbuffer
);
308 free( p_sys
->pp_jack_port_input
);
309 free( p_sys
->pp_jack_buffer
);
310 free( p_sys
->pp_jack_port_table
);
314 /*****************************************************************************
316 *****************************************************************************/
317 static int Control( demux_t
*p_demux
, int i_query
, va_list args
)
321 demux_sys_t
*p_sys
= p_demux
->p_sys
;
325 /* Special for access_demux */
326 case DEMUX_CAN_PAUSE
:
328 pb
= va_arg( args
, bool * );
332 case DEMUX_SET_PAUSE_STATE
:
334 case DEMUX_CAN_CONTROL_PACE
:
335 pb
= va_arg( args
, bool * );
336 *pb
= var_GetBool( p_demux
, "jack-input-use-vlc-pace" );
339 case DEMUX_GET_PTS_DELAY
:
340 pi64
= va_arg( args
, int64_t * );
341 *pi64
= INT64_C(1000) * var_InheritInteger( p_demux
, "live-caching" );
345 pi64
= va_arg( args
, int64_t * );
346 *pi64
= date_Get(&p_sys
->pts
);
349 /* TODO implement others */
358 /*****************************************************************************
360 *****************************************************************************/
361 static int Demux( demux_t
*p_demux
)
367 p_sys
= p_demux
->p_sys
;
368 p_es
= p_sys
->p_es_audio
;
369 p_block
= GrabJack( p_demux
);
373 es_out_SetPCR( p_demux
->out
, p_block
->i_pts
);
374 es_out_Send( p_demux
->out
, p_es
, p_block
);
381 /*****************************************************************************
382 * Process Callback : fill ringbuffer with Jack audio data
383 *****************************************************************************/
384 int Process( jack_nframes_t i_frames
, void *p_arg
)
386 demux_t
*p_demux
= ( demux_t
* )p_arg
;
387 demux_sys_t
*p_sys
= p_demux
->p_sys
;
389 /* Get and interlace buffers */
390 for ( unsigned i
= 0; i
< p_sys
->i_channels
; i
++ )
392 p_sys
->pp_jack_buffer
[i
] = jack_port_get_buffer(
393 p_sys
->pp_jack_port_input
[i
], i_frames
);
396 /* fill ring buffer with signal */
397 for( unsigned j
= 0; j
< i_frames
; j
++ )
399 for( unsigned i
= 0; i
<p_sys
->i_channels
; i
++ )
401 if( jack_ringbuffer_write_space( p_sys
->p_jack_ringbuffer
) <
402 p_sys
->jack_sample_size
) {
403 msg_Err( p_demux
, "buffer overflow");
404 return 0; // buffer overflow
406 size_t i_write
= jack_ringbuffer_write( p_sys
->p_jack_ringbuffer
,
407 ( char * ) (p_sys
->pp_jack_buffer
[i
]+j
),
408 p_sys
->jack_sample_size
);
409 if (i_write
!= p_sys
->jack_sample_size
) {
410 msg_Warn( p_demux
, "error writing on ring buffer");
419 /*****************************************************************************
420 * GrabJack: grab audio data in the Jack buffer
421 *****************************************************************************/
422 static block_t
*GrabJack( demux_t
*p_demux
)
424 demux_sys_t
*p_sys
= p_demux
->p_sys
;
427 /* read signal from ring buffer */
428 size_t i_read
= jack_ringbuffer_read_space( p_sys
->p_jack_ringbuffer
);
430 if( i_read
< 100 ) /* avoid small read */
431 { /* vlc has too much free time on its hands? */
433 #warning Hmm.... looks wrong
438 if( p_sys
->p_block_audio
)
440 p_block
= p_sys
->p_block_audio
;
444 p_block
= block_Alloc( i_read
);
448 msg_Warn( p_demux
, "cannot get block" );
452 //Find the previous power of 2, this algo assumes size_t has the same size on all arch
455 i_read
|= i_read
>> 1;
456 i_read
|= i_read
>> 2;
457 i_read
|= i_read
>> 4;
458 i_read
|= i_read
>> 8;
459 i_read
|= i_read
>> 16;
462 i_read
= jack_ringbuffer_read( p_sys
->p_jack_ringbuffer
, ( char * ) p_block
->p_buffer
, i_read
);
464 p_block
->i_dts
= p_block
->i_pts
= date_Increment( &p_sys
->pts
,
465 i_read
/(p_sys
->i_channels
* p_sys
->jack_sample_size
) );
467 p_sys
->p_block_audio
= p_block
;
468 p_block
->i_buffer
= i_read
;
469 p_sys
->p_block_audio
= 0;
475 /*****************************************************************************
476 * Port_finder: compare ports with the regexp entered
477 *****************************************************************************/
478 static void Port_finder( demux_t
*p_demux
)
480 demux_sys_t
*p_sys
= p_demux
->p_sys
;
481 char *psz_expr
= p_sys
->psz_ports
;
484 char *psz_uri
= NULL
;
485 const char **pp_jack_port_output
= NULL
;
487 int i_total_out_ports
=0;
488 p_sys
->pp_jack_port_table
= NULL
;
490 /* parse the ports part of the MRL */
491 for( token
= strtok_r( psz_expr
, ",", &state
); token
;
492 token
= strtok_r( NULL
, ",", &state
) )
494 psz_uri
= vlc_uri_decode_duplicate( token
);
495 /* get the ports which match the regexp */
496 pp_jack_port_output
= jack_get_ports( p_sys
->p_jack_client
,
497 psz_uri
, NULL
, JackPortIsOutput
);
498 if( pp_jack_port_output
== NULL
)
499 msg_Err( p_demux
, "port(s) asked not found:%s", psz_uri
);
502 while( pp_jack_port_output
[i_out_ports
] )
504 /* alloc an array to store all the matched ports */
505 p_sys
->pp_jack_port_table
= xrealloc( p_sys
->pp_jack_port_table
,
506 (i_out_ports
* sizeof( char * ) + i_total_out_ports
* sizeof( char * ) ) );
508 for(int i
=0; i
<i_out_ports
;i
++)
509 p_sys
->pp_jack_port_table
[i_total_out_ports
+i
] = ( char * ) pp_jack_port_output
[i
];
511 i_total_out_ports
+= i_out_ports
;
513 free( pp_jack_port_output
);
517 p_sys
->i_match_ports
= i_total_out_ports
;
521 /*****************************************************************************
522 * Parse: Parse the MRL
523 *****************************************************************************/
524 static void Parse( demux_t
*p_demux
)
526 demux_sys_t
*p_sys
= p_demux
->p_sys
;
527 char *psz_dup
= strdup( p_demux
->psz_location
);
528 char *psz_parser
= psz_dup
;
530 if( !strncmp( psz_parser
, "channels=", strlen( "channels=" ) ) )
532 p_sys
->i_channels
= abs( strtol( psz_parser
+ strlen( "channels=" ),
535 else if( !strncmp( psz_parser
, "ports=", strlen( "ports=" ) ) )
538 psz_parser
+= strlen( "ports=" );
539 if( strchr( psz_parser
, ':' ) )
541 i_len
= strchr( psz_parser
, ':' ) - psz_parser
;
545 i_len
= strlen( psz_parser
);
547 p_sys
->psz_ports
= strndup( psz_parser
, i_len
);
552 msg_Warn( p_demux
, "unknown option" );
555 while( *psz_parser
&& *psz_parser
!= ':' )
560 if( *psz_parser
== ':' )
564 *psz_parser
++ = '\0';
565 if( !strncmp( psz_parser
, "channels=", strlen( "channels=" ) ) )
567 p_sys
->i_channels
= abs( strtol(
568 psz_parser
+ strlen( "channels=" ), &psz_parser
, 0 ) );
570 else if( !strncmp( psz_parser
, "ports=", strlen( "ports=" ) ) )
573 psz_parser
+= strlen( "ports=" );
574 if( strchr( psz_parser
, ':' ) )
576 i_len
= strchr( psz_parser
, ':' ) - psz_parser
;
580 i_len
= strlen( psz_parser
);
582 p_sys
->psz_ports
= strndup( psz_parser
, i_len
);
587 msg_Warn( p_demux
, "unknown option" );
589 while( *psz_parser
&& *psz_parser
!= ':' )
594 if( *psz_parser
== '\0' )