1 /*****************************************************************************
2 * jack.c: JACK audio input module
3 *****************************************************************************
4 * Copyright (C) 2007-2008 the VideoLAN team
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
13 * it under the terms of the GNU General Public License as published by
14 * the Free Software Foundation; either version 2 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 General Public License for more details.
22 * You should have received a copy of the GNU General Public License
23 * along with this program; if not, write to the Free Software
24 * Foundation, 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>
44 #include <vlc_codecs.h>
46 #include <vlc_strings.h>
48 #include <jack/jack.h>
49 #include <jack/ringbuffer.h>
52 #include <sys/types.h>
55 /*****************************************************************************
57 *****************************************************************************/
58 static int Open ( vlc_object_t * );
59 static void Close( vlc_object_t * );
61 #define CACHING_TEXT N_("Caching value in ms")
62 #define CACHING_LONGTEXT N_( \
63 "Make VLC buffer audio data captured from jack for the specified " \
64 "length in milliseconds." )
65 #define PACE_TEXT N_( "Pace" )
66 #define PACE_LONGTEXT N_( \
67 "Read the audio stream at VLC pace rather than Jack pace." )
68 #define AUTO_CONNECT_TEXT N_( "Auto Connection" )
69 #define AUTO_CONNECT_LONGTEXT N_( \
70 "Automatically connect VLC input ports to available output ports." )
73 set_description( N_("JACK audio input") )
74 set_capability( "access_demux", 0 )
75 set_shortname( N_( "JACK Input" ) )
76 set_category( CAT_INPUT )
77 set_subcategory( SUBCAT_INPUT_ACCESS )
79 add_integer( "jack-input-caching", DEFAULT_PTS_DELAY / 1000, NULL,
80 CACHING_TEXT, CACHING_LONGTEXT, true )
81 add_bool( "jack-input-use-vlc-pace", false, NULL,
82 PACE_TEXT, PACE_LONGTEXT, true )
83 add_bool( "jack-input-auto-connect", false, NULL,
84 AUTO_CONNECT_TEXT, AUTO_CONNECT_LONGTEXT, true )
86 add_shortcut( "jack" )
87 set_callbacks( Open, Close )
90 /*****************************************************************************
92 *****************************************************************************/
96 /* Audio properties */
97 vlc_fourcc_t i_acodec_raw;
98 unsigned int i_channels;
100 int i_audio_max_frame_size;
102 block_t *p_block_audio;
103 es_out_id_t *p_es_audio;
106 /* Jack properties */
107 jack_client_t *p_jack_client;
108 jack_port_t **pp_jack_port_input;
109 jack_default_audio_sample_t **pp_jack_buffer;
110 jack_ringbuffer_t *p_jack_ringbuffer;
111 jack_nframes_t jack_buffer_size;
112 jack_nframes_t jack_sample_rate;
113 size_t jack_sample_size;
115 char **pp_jack_port_table;
119 static int Demux( demux_t * );
120 static int Control( demux_t *p_demux, int i_query, va_list args );
122 static void Parse ( demux_t * );
123 static void Port_finder( demux_t * );
124 static int Process( jack_nframes_t i_frames, void *p_arg );
126 static block_t *GrabJack( demux_t * );
128 /*****************************************************************************
129 * Open: Connect to the JACK server
130 *****************************************************************************/
131 static int Open( vlc_object_t *p_this )
134 demux_t *p_demux = ( demux_t* )p_this;
139 p_demux->pf_demux = Demux;
140 p_demux->pf_control = Control;
142 /* Allocate structure */
143 p_demux->p_sys = p_sys = calloc( 1, sizeof( demux_sys_t ) );
151 var_Create( p_demux, "jack-input-caching",
152 VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
153 var_Create( p_demux, "jack-input-use-vlc-pace",
154 VLC_VAR_BOOL | VLC_VAR_DOINHERIT );
155 var_Create( p_demux, "jack-input-auto-connect",
156 VLC_VAR_BOOL | VLC_VAR_DOINHERIT );
158 /* JACK connexions */
159 /* define name and connect to jack server */
160 char p_vlc_client_name[32];
161 sprintf( p_vlc_client_name, "vlc-input-%d", getpid() );
162 p_sys->p_jack_client = jack_client_new( p_vlc_client_name );
163 if( p_sys->p_jack_client == NULL )
165 msg_Err( p_demux, "failed to connect to JACK server" );
170 /* find some specifics ports if user entered a regexp */
171 if( p_sys->psz_ports )
173 Port_finder( p_demux );
174 if( p_sys->i_channels == 0 )
176 p_sys->i_channels = p_sys->i_match_ports;
180 /* allocate input ports */
181 if( p_sys->i_channels == 0 ) p_sys->i_channels = 2 ; /* default number of port */
182 p_sys->pp_jack_port_input = malloc(
183 p_sys->i_channels * sizeof( jack_port_t* ) );
184 if( p_sys->pp_jack_port_input == NULL )
186 jack_client_close( p_sys->p_jack_client );
191 /* allocate ringbuffer */
192 /* The length of the ringbuffer is critical, it must be large enought
193 to keep all data between 2 GrabJack() calls. We assume 1 sec is ok */
194 p_sys->p_jack_ringbuffer = jack_ringbuffer_create( p_sys->i_channels
195 * jack_get_sample_rate( p_sys->p_jack_client )
196 * sizeof( jack_default_audio_sample_t ) );
197 if( p_sys->p_jack_ringbuffer == NULL )
199 free( p_sys->pp_jack_port_input );
200 jack_client_close( p_sys->p_jack_client );
205 /* register input ports */
206 for( i = 0; i < p_sys->i_channels; i++ )
208 char p_input_name[32];
209 snprintf( p_input_name, 32, "vlc_in_%d", i+1 );
210 p_sys->pp_jack_port_input[i] = jack_port_register(
211 p_sys->p_jack_client, p_input_name, JACK_DEFAULT_AUDIO_TYPE,
212 JackPortIsInput, 0 );
213 if( p_sys->pp_jack_port_input[i] == NULL )
215 msg_Err( p_demux, "failed to register a JACK port" );
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 );
224 /* allocate buffer for input ports */
225 p_sys->pp_jack_buffer = malloc ( p_sys->i_channels
226 * sizeof( jack_default_audio_sample_t * ) );
227 if( p_sys->pp_jack_buffer == NULL )
229 for( i = 0; i < p_sys->i_channels; i++ )
230 jack_port_unregister( p_sys->p_jack_client, p_sys->pp_jack_port_input[i] );
231 jack_ringbuffer_free( p_sys->p_jack_ringbuffer );
232 free( p_sys->pp_jack_port_input );
233 jack_client_close( p_sys->p_jack_client );
238 /* set process callback */
239 jack_set_process_callback( p_sys->p_jack_client, Process, p_demux );
241 /* tell jack server we are ready */
242 if ( jack_activate( p_sys->p_jack_client ) )
244 msg_Err( p_demux, "failed to activate JACK client" );
245 free( p_sys->pp_jack_buffer );
246 for( i = 0; i < p_sys->i_channels; i++ )
247 jack_port_unregister( p_sys->p_jack_client, p_sys->pp_jack_port_input[i] );
248 jack_ringbuffer_free( p_sys->p_jack_ringbuffer );
249 free( p_sys->pp_jack_port_input );
250 jack_client_close( p_sys->p_jack_client );
255 /* connect vlc input to specifics jack output ports if requested */
256 /* if( var_GetBool( p_demux, "jack-input-auto-connect" ) && p_sys->psz_ports ) */
257 if( p_sys->psz_ports )
262 if( p_sys->i_match_ports > 0 )
264 for( j = 0; j < p_sys->i_match_ports; j++ )
266 i_input_ports = j % p_sys->i_channels;
267 jack_connect( p_sys->p_jack_client, p_sys->pp_jack_port_table[j],
268 jack_port_name( p_sys->pp_jack_port_input[i_input_ports] ) );
273 /* connect vlc input to all jack output ports if requested */
274 if( var_GetBool( p_demux, "jack-input-auto-connect" ) && !p_sys->psz_ports )
278 const char **pp_jack_port_output;
280 pp_jack_port_output = jack_get_ports( p_sys->p_jack_client, NULL, NULL, JackPortIsOutput );
282 while( pp_jack_port_output && pp_jack_port_output[i_out_ports] )
286 if( i_out_ports > 0 )
288 for( j = 0; j < i_out_ports; j++ )
290 i_input_ports = j % p_sys->i_channels;
291 jack_connect( p_sys->p_jack_client, pp_jack_port_output[j],
292 jack_port_name( p_sys->pp_jack_port_input[i_input_ports] ) );
295 free( pp_jack_port_output );
298 /* info about jack server */
299 /* get buffers size */
300 p_sys->jack_buffer_size = jack_get_buffer_size( p_sys->p_jack_client );
301 /* get sample rate */
302 p_sys->jack_sample_rate = jack_get_sample_rate( p_sys->p_jack_client );
303 /* get sample size */
304 p_sys->jack_sample_size = sizeof( jack_default_audio_sample_t );
306 /* Define output format */
307 es_format_Init( &fmt, AUDIO_ES, VLC_CODEC_FL32 );
308 fmt.audio.i_channels = p_sys->i_channels;
309 fmt.audio.i_rate = p_sys->jack_sample_rate;
310 fmt.audio.i_bitspersample = p_sys->jack_sample_size * 8;
311 fmt.audio.i_blockalign = fmt.audio.i_bitspersample / 8;
312 fmt.i_bitrate = fmt.audio.i_rate * fmt.audio.i_bitspersample
313 * fmt.audio.i_channels;
315 p_sys->p_es_audio = es_out_Add( p_demux->out, &fmt );
316 date_Init( &p_sys->pts, fmt.audio.i_rate, 1 );
317 date_Set( &p_sys->pts, 1 );
323 /*****************************************************************************
324 * Close: Disconnect from jack server and release associated resources
325 *****************************************************************************/
326 static void Close( vlc_object_t *p_this )
328 demux_t *p_demux = ( demux_t* )p_this;
329 demux_sys_t *p_sys = p_demux->p_sys;
331 msg_Dbg( p_demux,"Module unloaded" );
332 if( p_sys->p_block_audio ) block_Release( p_sys->p_block_audio );
333 if( p_sys->p_jack_client ) jack_client_close( p_sys->p_jack_client );
334 if( p_sys->p_jack_ringbuffer ) jack_ringbuffer_free( p_sys->p_jack_ringbuffer );
335 free( p_sys->pp_jack_port_input );
336 free( p_sys->pp_jack_buffer );
337 free( p_sys->pp_jack_port_table );
342 /*****************************************************************************
344 *****************************************************************************/
345 static int Control( demux_t *p_demux, int i_query, va_list args )
349 demux_sys_t *p_sys = p_demux->p_sys;
353 /* Special for access_demux */
354 case DEMUX_CAN_PAUSE:
356 pb = (bool *)va_arg( args, bool * );
360 case DEMUX_SET_PAUSE_STATE:
362 case DEMUX_CAN_CONTROL_PACE:
363 pb = ( bool* )va_arg( args, bool * );
364 *pb = var_GetBool( p_demux, "jack-input-use-vlc-pace" );
367 case DEMUX_GET_PTS_DELAY:
368 pi64 = ( int64_t* )va_arg( args, int64_t * );
369 *pi64 = ( int64_t )var_GetInteger( p_demux, "jack-input-caching" )
374 pi64 = ( int64_t* )va_arg( args, int64_t * );
375 *pi64 = date_Get(&p_sys->pts);
378 /* TODO implement others */
387 /*****************************************************************************
389 *****************************************************************************/
390 static int Demux( demux_t *p_demux )
397 p_sys = p_demux->p_sys;
398 p_es = p_sys->p_es_audio;
399 p_block = GrabJack( p_demux );
403 es_out_Control( p_demux->out, ES_OUT_SET_PCR, p_block->i_pts );
404 es_out_Send( p_demux->out, p_es, p_block );
411 /*****************************************************************************
412 * Process Callback : fill ringbuffer with Jack audio data
413 *****************************************************************************/
414 int Process( jack_nframes_t i_frames, void *p_arg )
416 demux_t *p_demux = ( demux_t* )p_arg;
417 demux_sys_t *p_sys = p_demux->p_sys;
421 /* Get and interlace buffers */
422 for ( i = 0; i < p_sys->i_channels ; i++ )
424 p_sys->pp_jack_buffer[i] = jack_port_get_buffer(
425 p_sys->pp_jack_port_input[i], i_frames );
428 /* fill ring buffer with signal */
429 for( j = 0; j < i_frames; j++ )
431 for( i = 0; i <p_sys->i_channels; i++ )
433 if( jack_ringbuffer_write_space( p_sys->p_jack_ringbuffer ) <
434 p_sys->jack_sample_size ) {
435 msg_Err( p_demux, "buffer overflow");
436 return 0; // buffer overflow
438 i_write = jack_ringbuffer_write( p_sys->p_jack_ringbuffer,
439 ( char * ) (p_sys->pp_jack_buffer[i]+j),
440 p_sys->jack_sample_size );
441 if (i_write != p_sys->jack_sample_size ) {
442 msg_Warn( p_demux, "error writing on ring buffer");
451 /*****************************************************************************
452 * GrabJack: grab audio data in the Jack buffer
453 *****************************************************************************/
454 static block_t *GrabJack( demux_t *p_demux )
457 demux_sys_t *p_sys = p_demux->p_sys;
460 /* read signal from ring buffer */
461 i_read = jack_ringbuffer_read_space( p_sys->p_jack_ringbuffer );
463 if( i_read < 100 ) /* avoid small read */
464 { /* vlc has too much free time on its hands? */
466 #warning Hmm.... looks wrong
471 if( p_sys->p_block_audio )
473 p_block = p_sys->p_block_audio;
477 p_block = block_New( p_demux, i_read );
481 msg_Warn( p_demux, "cannot get block" );
485 //Find the previous power of 2, this algo assumes size_t has the same size on all arch
488 i_read |= i_read >> 1;
489 i_read |= i_read >> 2;
490 i_read |= i_read >> 4;
491 i_read |= i_read >> 8;
492 i_read |= i_read >> 16;
495 i_read = jack_ringbuffer_read( p_sys->p_jack_ringbuffer, ( char * ) p_block->p_buffer, i_read );
497 p_block->i_dts = p_block->i_pts = date_Increment( &p_sys->pts,
498 i_read/(p_sys->i_channels * p_sys->jack_sample_size) );
500 p_sys->p_block_audio = p_block;
501 p_block->i_buffer = i_read;
502 p_sys->p_block_audio = 0;
508 /*****************************************************************************
509 * Port_finder: compare ports with the regexp entered
510 *****************************************************************************/
511 static void Port_finder( demux_t *p_demux )
514 demux_sys_t *p_sys = p_demux->p_sys;
515 char *psz_expr = p_sys->psz_ports;
518 char *psz_uri = NULL;
519 const char **pp_jack_port_output = NULL;
521 int i_total_out_ports =0;
522 p_sys->pp_jack_port_table = NULL;
524 /* parse the ports part of the MRL */
525 for( token = strtok_r( psz_expr, ",", &state ); token;
526 token = strtok_r( NULL, ",", &state ) )
528 psz_uri = decode_URI_duplicate( token );
529 /* get the ports which match the regexp */
530 pp_jack_port_output = jack_get_ports( p_sys->p_jack_client,
531 psz_uri, NULL, JackPortIsOutput );
532 if( pp_jack_port_output == NULL )
534 msg_Err( p_demux, "port(s) asked not found:%s", psz_uri );
535 free( pp_jack_port_output );
539 while( pp_jack_port_output && pp_jack_port_output[i_out_ports] )
543 /* alloc an array to store all the matched ports */
544 p_sys->pp_jack_port_table = realloc( p_sys->pp_jack_port_table,
545 (i_out_ports * sizeof( char * ) + i_total_out_ports * sizeof( char * ) ) );
547 for(int i=0; i<i_out_ports;i++)
549 p_sys->pp_jack_port_table[i_total_out_ports+i] = ( char * ) pp_jack_port_output[i];
552 i_total_out_ports += i_out_ports;
556 free( pp_jack_port_output );
557 p_sys->i_match_ports = i_total_out_ports;
561 /*****************************************************************************
562 * Parse: Parse the MRL
563 *****************************************************************************/
564 static void Parse( demux_t *p_demux )
566 demux_sys_t *p_sys = p_demux->p_sys;
567 char *psz_dup = strdup( p_demux->psz_path );
568 char *psz_parser = psz_dup;
570 if( !strncmp( psz_parser, "channels=", strlen( "channels=" ) ) )
572 p_sys->i_channels = abs( strtol( psz_parser + strlen( "channels=" ),
575 else if( !strncmp( psz_parser, "ports=", strlen( "ports=" ) ) )
578 psz_parser += strlen( "ports=" );
579 if( strchr( psz_parser, ':' ) )
581 i_len = strchr( psz_parser, ':' ) - psz_parser;
585 i_len = strlen( psz_parser );
587 p_sys->psz_ports = strndup( psz_parser, i_len );
592 msg_Warn( p_demux, "unknown option" );
595 while( *psz_parser && *psz_parser != ':' )
600 if( *psz_parser == ':' )
604 *psz_parser++ = '\0';
605 if( !strncmp( psz_parser, "channels=", strlen( "channels=" ) ) )
607 p_sys->i_channels = abs( strtol(
608 psz_parser + strlen( "channels=" ), &psz_parser, 0 ) );
610 else if( !strncmp( psz_parser, "ports=", strlen( "ports=" ) ) )
613 psz_parser += strlen( "ports=" );
614 if( strchr( psz_parser, ':' ) )
616 i_len = strchr( psz_parser, ':' ) - psz_parser;
620 i_len = strlen( psz_parser );
622 p_sys->psz_ports = strndup( psz_parser, i_len );
627 msg_Warn( p_demux, "unknown option" );
629 while( *psz_parser && *psz_parser != ':' )
634 if( *psz_parser == '\0' )