1 /*****************************************************************************
2 * jack.c: JACK audio input module
3 *****************************************************************************
4 * Copyright (C) 2007 the VideoLAN team
5 * Copyright (C) 2007 Société des arts technologiques
7 * Authors: Arnaud Sala <arnaud.sala at savoirfairelinux.com>
8 * Julien Plissonneau Duquene <... at savoirfairelinux.com>
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License as published by
12 * the Free Software Foundation; either version 2 of the License, or
13 * (at your option) any later version.
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 * GNU General Public License for more details.
20 * You should have received a copy of the GNU General Public License
21 * along with this program; if not, write to the Free Software
22 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
23 *****************************************************************************/
26 * \file modules/access/jack.c
27 * \brief JACK audio input functions
30 /*****************************************************************************
32 *****************************************************************************/
38 #include <vlc_input.h>
39 #include <vlc_demux.h>
41 #include <vlc_codecs.h>
43 #include <vlc_strings.h>
45 #include <jack/jack.h>
46 #include <jack/ringbuffer.h>
48 #include <sys/mman.h> /* mlock() */
51 /*****************************************************************************
53 *****************************************************************************/
54 static int Open ( vlc_object_t * );
55 static void Close( vlc_object_t * );
57 #define CACHING_TEXT N_("Caching value in ms")
58 #define CACHING_LONGTEXT N_( \
59 "Make VLC buffer audio data capturer from jack for the specified " \
60 "length in milliseconds." )
61 #define PACE_TEXT N_( "Pace" )
62 #define PACE_LONGTEXT N_( \
63 "Read the audio stream at VLC pace rather than Jack pace." )
64 #define AUTO_CONNECT_TEXT N_( "Auto Connection" )
65 #define AUTO_CONNECT_LONGTEXT N_( \
66 "Automatically connect VLC input ports to available output ports." )
69 set_description( _("JACK audio input") );
70 set_capability( "access_demux", 0 );
71 set_shortname( _( "JACK Input" ) );
72 set_category( CAT_INPUT );
73 set_subcategory( SUBCAT_INPUT_ACCESS );
75 add_integer( "jack-input-caching", DEFAULT_PTS_DELAY / 1000, NULL,
76 CACHING_TEXT, CACHING_LONGTEXT, VLC_TRUE );
77 add_bool( "jack-input-use-vlc-pace", VLC_FALSE, NULL,
78 PACE_TEXT, PACE_LONGTEXT, VLC_TRUE );
79 add_bool( "jack-input-auto-connect", VLC_FALSE, NULL,
80 PACE_TEXT, PACE_LONGTEXT, VLC_TRUE );
82 add_shortcut( "jack" );
83 set_callbacks( Open, Close );
86 /*****************************************************************************
88 *****************************************************************************/
92 /* Audio properties */
93 vlc_fourcc_t i_acodec_raw;
94 unsigned int i_channels;
96 int i_audio_max_frame_size;
98 block_t *p_block_audio;
99 es_out_id_t *p_es_audio;
102 /* Jack properties */
103 jack_client_t *p_jack_client;
104 jack_port_t **pp_jack_port_input;
105 jack_default_audio_sample_t **pp_jack_buffer;
106 jack_ringbuffer_t *p_jack_ringbuffer;
107 jack_nframes_t jack_buffer_size;
108 jack_nframes_t jack_sample_rate;
109 size_t jack_sample_size;
112 static int Demux( demux_t * );
113 static int Control( demux_t *p_demux, int i_query, va_list args );
115 static void Parse ( 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 )
126 demux_t *p_demux = ( demux_t* )p_this;
129 p_demux->pf_demux = Demux;
130 p_demux->pf_control = Control;
132 /* Allocate structure */
133 p_demux->p_sys = p_sys = calloc( 1, sizeof( demux_sys_t ) );
136 msg_Err( p_demux, "out of memory, cannot allocate structure" );
139 memset( p_sys, 0, sizeof( demux_sys_t ) );
145 var_Create( p_demux, "jack-input-caching",
146 VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
147 var_Create( p_demux, "jack-input-use-vlc-pace",
148 VLC_VAR_BOOL | VLC_VAR_DOINHERIT );
149 var_Create( p_demux, "jack-input-auto-connect",
150 VLC_VAR_BOOL | VLC_VAR_DOINHERIT );
152 /* JACK connexions */
153 /* define name and connect to jack server */
154 char p_vlc_client_name[32];
155 sprintf( p_vlc_client_name, "vlc-input-%d", getpid() );
156 p_sys->p_jack_client = jack_client_new( p_vlc_client_name );
157 if( p_sys->p_jack_client == NULL )
159 msg_Err( p_demux, "failed to connect to JACK server" );
164 /* allocate input ports */
165 if( p_sys->i_channels == 0 || p_sys->i_channels > 8 )
166 p_sys->i_channels = 2 ; /* default number of port */
167 p_sys->pp_jack_port_input = malloc(
168 p_sys->i_channels * sizeof( jack_port_t* ) );
169 if( p_sys->pp_jack_port_input == NULL )
171 msg_Err( p_demux, "out of memory, cannot allocate input ports" );
175 /* allocate ringbuffer */
176 p_sys->p_jack_ringbuffer = jack_ringbuffer_create( p_sys->i_channels
177 * jack_get_buffer_size( p_sys->p_jack_client )
178 * sizeof( jack_default_audio_sample_t ) );
179 if( p_sys->p_jack_ringbuffer == NULL )
181 msg_Err( p_demux, "out of memory, cannot allocate ringbuffer" );
185 /* register input ports */
186 for( i = 0; i < p_sys->i_channels; i++ )
188 char p_input_name[32];
189 snprintf( p_input_name, 32, "vlc_in_%d", i+1 );
190 p_sys->pp_jack_port_input[i] = jack_port_register(
191 p_sys->p_jack_client, p_input_name, JACK_DEFAULT_AUDIO_TYPE,
192 JackPortIsInput, 0 );
193 if( p_sys->pp_jack_port_input[i] == NULL )
195 msg_Err( p_demux, "failed to register a JACK port" );
196 if( p_sys->p_jack_client) jack_client_close( p_sys->p_jack_client );
197 if( p_sys->pp_jack_port_input ) free( p_sys->pp_jack_port_input );
198 if( p_sys->p_jack_ringbuffer ) jack_ringbuffer_free( p_sys->p_jack_ringbuffer );
199 if( p_sys->pp_jack_buffer ) free( p_sys->pp_jack_buffer );
205 /* allocate buffer for input ports */
206 p_sys->pp_jack_buffer = malloc ( p_sys->i_channels
207 * sizeof( jack_default_audio_sample_t * ) );
208 if( p_sys->pp_jack_buffer == NULL )
210 msg_Err( p_demux, "out of memory, cannot allocate input buffer" );
214 /* set process callback */
215 jack_set_process_callback( p_sys->p_jack_client, Process, p_demux );
217 /* tell jack server we are ready */
218 if ( jack_activate( p_sys->p_jack_client ) )
220 msg_Err( p_demux, "failed to activate JACK client" );
221 if( p_sys->p_jack_client) jack_client_close( p_sys->p_jack_client );
222 if( p_sys->pp_jack_port_input ) free( p_sys->pp_jack_port_input );
223 if( p_sys->p_jack_ringbuffer ) jack_ringbuffer_free( p_sys->p_jack_ringbuffer );
224 if( p_sys->pp_jack_buffer ) free( p_sys->pp_jack_buffer );
229 /* connect vlc input to jack output ports if requested */
230 if( var_GetBool( p_demux, "jack-input-auto-connect" ) )
232 const char **pp_jack_port_output;
236 pp_jack_port_output = jack_get_ports( p_sys->p_jack_client, NULL, NULL,
239 while( pp_jack_port_output && pp_jack_port_output[i_out_ports] )
243 if( i_out_ports > 0 )
245 for( j = 0; j < i_out_ports; j++ )
247 i_in = j % p_sys->i_channels;
248 jack_connect( p_sys->p_jack_client, pp_jack_port_output[j],
249 jack_port_name( p_sys->pp_jack_port_input[i_in] ) );
252 if( pp_jack_port_output ) free( pp_jack_port_output );
255 /* info about jack server */
256 /* get buffers size */
257 p_sys->jack_buffer_size = jack_get_buffer_size( p_sys->p_jack_client );
258 /* get sample rate */
259 p_sys->jack_sample_rate = jack_get_sample_rate( p_sys->p_jack_client );
260 /* get sample size */
261 p_sys->jack_sample_size = sizeof( jack_default_audio_sample_t );
263 /* Define output format */
264 es_format_Init( &fmt, AUDIO_ES, VLC_FOURCC( 'f','l','3','2' ) );
265 fmt.audio.i_channels = p_sys->i_channels;
266 fmt.audio.i_rate = p_sys->jack_sample_rate;
267 fmt.audio.i_bitspersample = p_sys->jack_sample_size * 8;
268 fmt.audio.i_blockalign = fmt.audio.i_bitspersample / 8;
269 fmt.i_bitrate = fmt.audio.i_rate * fmt.audio.i_bitspersample
270 * fmt.audio.i_channels;
272 p_sys->p_es_audio = es_out_Add( p_demux->out, &fmt );
273 date_Init( &p_sys->pts, fmt.audio.i_rate, 1 );
274 date_Set( &p_sys->pts, 1 );
280 /*****************************************************************************
281 * Close: Disconnect from jack server and release associated resources
282 *****************************************************************************/
283 static void Close( vlc_object_t *p_this )
285 demux_t *p_demux = ( demux_t* )p_this;
286 demux_sys_t *p_sys = p_demux->p_sys;
288 msg_Dbg( p_demux,"Module unloaded" );
289 if( p_sys->p_block_audio ) block_Release( p_sys->p_block_audio );
290 if( p_sys->p_jack_client ) jack_client_close( p_sys->p_jack_client );
291 if( p_sys->p_jack_ringbuffer ) jack_ringbuffer_free( p_sys->p_jack_ringbuffer );
292 if( p_sys->pp_jack_port_input ) free( p_sys->pp_jack_port_input );
293 if( p_sys->pp_jack_buffer ) free( p_sys->pp_jack_buffer );
298 /*****************************************************************************
300 *****************************************************************************/
301 static int Control( demux_t *p_demux, int i_query, va_list args )
305 demux_sys_t *p_sys = p_demux->p_sys;
309 /* Special for access_demux */
310 case DEMUX_CAN_PAUSE:
311 case DEMUX_SET_PAUSE_STATE:
313 case DEMUX_CAN_CONTROL_PACE:
314 pb = ( vlc_bool_t* )va_arg( args, vlc_bool_t * );
315 *pb = var_GetBool( p_demux, "jack-input-use-vlc-pace" );
318 case DEMUX_GET_PTS_DELAY:
319 pi64 = ( int64_t* )va_arg( args, int64_t * );
320 *pi64 = ( int64_t )var_GetInteger( p_demux, "jack-input-caching" )
325 pi64 = ( int64_t* )va_arg( args, int64_t * );
326 *pi64 = date_Get(&p_sys->pts);
329 /* TODO implement others */
338 /*****************************************************************************
340 *****************************************************************************/
341 static int Demux( demux_t *p_demux )
348 p_sys = p_demux->p_sys;
349 p_es = p_sys->p_es_audio;
350 p_block = GrabJack( p_demux );
354 es_out_Control( p_demux->out, ES_OUT_SET_PCR, p_block->i_pts );
355 es_out_Send( p_demux->out, p_es, p_block );
362 /*****************************************************************************
363 * Process Callback : fill ringbuffer with Jack audio data
364 *****************************************************************************/
365 int Process( jack_nframes_t i_frames, void *p_arg )
367 demux_t *p_demux = ( demux_t* )p_arg;
368 demux_sys_t *p_sys = p_demux->p_sys;
372 /* Get and interlace buffers */
373 for ( i = 0; i < p_sys->i_channels ; i++ )
375 p_sys->pp_jack_buffer[i] = jack_port_get_buffer(
376 p_sys->pp_jack_port_input[i], i_frames );
379 /* fill ring buffer with signal */
380 for( j = 0; j < p_sys->jack_buffer_size; j++ )
382 for( i = 0; i <p_sys->i_channels; i++ )
384 if( jack_ringbuffer_write_space( p_sys->p_jack_ringbuffer )
385 < p_sys->jack_sample_size ) return 1; // buffer overflow
386 i_write = jack_ringbuffer_write( p_sys->p_jack_ringbuffer,
387 p_sys->pp_jack_buffer[i]+j, p_sys->jack_sample_size );
395 /*****************************************************************************
396 * GrabJack: grab audio data in the Jack buffer
397 *****************************************************************************/
398 static block_t *GrabJack( demux_t *p_demux )
401 demux_sys_t *p_sys = p_demux->p_sys;
404 /* read signal from ring buffer */
405 i_read = jack_ringbuffer_read_space( p_sys->p_jack_ringbuffer );
407 if( i_read < 100 ) /* avoid small read */
408 { /* vlc has too much free time on its hands? */
413 if( p_sys->p_block_audio )
415 p_block = p_sys->p_block_audio;
419 p_block = block_New( p_demux, i_read );
423 msg_Warn( p_demux, "cannot get block" );
427 p_sys->p_block_audio = p_block;
428 p_block->i_buffer = i_read;
429 p_sys->p_block_audio = 0;
431 jack_ringbuffer_read( p_sys->p_jack_ringbuffer, p_block->p_buffer, i_read );
433 p_block->i_dts = p_block->i_pts = date_Increment(
434 &p_sys->pts, i_read/(p_sys->i_channels * p_sys->jack_sample_size) );
440 /*****************************************************************************
441 * Parse: Parse the MRL
442 *****************************************************************************/
443 static void Parse( demux_t *p_demux )
445 demux_sys_t *p_sys = p_demux->p_sys;
446 char *psz_dup = strdup( p_demux->psz_path );
447 char *psz_parser = psz_dup;
449 if( !strncmp( psz_parser, "channels=", strlen( "channels=" ) ) )
451 p_sys->i_channels = abs( strtol( psz_parser + strlen( "channels=" ),
456 msg_Warn( p_demux, "unknown option" );
459 while( *psz_parser && *psz_parser != ':' )
464 if( *psz_parser == ':' )
468 *psz_parser++ = '\0';
469 if( !strncmp( psz_parser, "channels=", strlen( "channels=" ) ) )
471 p_sys->i_channels = abs( strtol(
472 psz_parser + strlen( "channels=" ), &psz_parser, 0 ) );
476 msg_Warn( p_demux, "unknown option" );
478 while( *psz_parser && *psz_parser != ':' )
483 if( *psz_parser == '\0' )