research.m1stereo.tv/gitweb/ - melted/blob - src/modules/jackrack/filter_jackrack.c

   1 /*
   2  * filter_jackrack.c -- filter audio through Jack and/or LADSPA plugins
   3  * Copyright (C) 2004 Ushodaya Enterprises Limited
   4  * Author: Dan Dennedy <dan@dennedy.org>
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; either version 2 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program; if not, write to the Free Software Foundation,
  18  * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  19  */
  20
  21 #include "filter_jackrack.h"
  22
  23 #include <framework/mlt_frame.h>
  24
  25 #include <stdio.h>
  26 #include <stdlib.h>
  27 #include <sys/types.h>
  28 #include <unistd.h>
  29
  30 #include <jack/jack.h>
  31 #include <jack/ringbuffer.h>
  32 #include <pthread.h>
  33 #include <string.h>
  34
  35 #include "ui.h"
  36
  37 #define BUFFER_LEN 204800 * 3
  38
  39 static void *jackrack_thread( void *arg )
  40 {
  41         mlt_properties properties = arg;
  42         ui_t *jackrack = mlt_properties_get_data( properties, "jackrack", NULL );
  43
  44         while ( mlt_properties_get_int( properties, "_done" ) == 0 )
  45                 if ( ui_loop_iterate( jackrack ) )
  46                         break;
  47
  48         ui_quit( jackrack );
  49         ui_destroy( jackrack );
  50
  51         return NULL;
  52 }
  53
  54 static void initialise_jack_ports( mlt_properties properties )
  55 {
  56         int i;
  57         char mlt_name[20], rack_name[30];
  58         jack_port_t **port = NULL;
  59         jack_client_t *jack_client = mlt_properties_get_data( properties, "jack_client", NULL );
  60         jack_nframes_t jack_buffer_size = jack_get_buffer_size( jack_client );
  61
  62         // Propogate these for the Jack processing callback
  63         int channels = mlt_properties_get_int( properties, "channels" );
  64
  65         // Start JackRack
  66         if ( mlt_properties_get( properties, "src" ) )
  67         {
  68                 pthread_t *jackrack_pthread = mlt_pool_alloc( sizeof( pthread_t ) );
  69
  70                 snprintf( rack_name, sizeof( rack_name ), "jackrack%d", getpid() );
  71                 ui_t *jackrack = ui_new( rack_name, mlt_properties_get_int( properties, "channels" ), 0, 0 );
  72                 jack_rack_open_file( jackrack, mlt_properties_get( properties, "src" ) );
  73
  74                 mlt_properties_set_data( properties, "jackrack", jackrack, 0, NULL, NULL );
  75                 mlt_properties_set( properties, "_rack_client_name", rack_name );
  76                 mlt_properties_set_int( properties, "_done", 0 );
  77                 mlt_properties_set_data( properties, "jackrack_pthread", jackrack_pthread, 0, NULL, NULL );
  78
  79                 pthread_create( jackrack_pthread, NULL, jackrack_thread, properties );
  80         }
  81
  82         // Allocate buffers and ports
  83         jack_ringbuffer_t **output_buffers = mlt_pool_alloc( sizeof( jack_ringbuffer_t *) * channels );
  84         jack_ringbuffer_t **input_buffers = mlt_pool_alloc( sizeof( jack_ringbuffer_t *) * channels );
  85         jack_port_t **jack_output_ports = mlt_pool_alloc( sizeof(jack_port_t *) * channels );
  86         jack_port_t **jack_input_ports = mlt_pool_alloc( sizeof(jack_port_t *) * channels );
  87         float **jack_output_buffers = mlt_pool_alloc( sizeof(float *) * jack_buffer_size );
  88         float **jack_input_buffers = mlt_pool_alloc( sizeof(float *) * jack_buffer_size );
  89
  90         // Set properties - released inside filter_close
  91         mlt_properties_set_data( properties, "output_buffers", output_buffers, sizeof( jack_ringbuffer_t *) * channels, NULL, NULL );
  92         mlt_properties_set_data( properties, "input_buffers", input_buffers, sizeof( jack_ringbuffer_t *) * channels, NULL, NULL );
  93         mlt_properties_set_data( properties, "jack_output_ports", jack_output_ports, sizeof( jack_port_t *) * channels, NULL, NULL );
  94         mlt_properties_set_data( properties, "jack_input_ports", jack_input_ports, sizeof( jack_port_t *) * channels, NULL, NULL );
  95         mlt_properties_set_data( properties, "jack_output_buffers", jack_output_buffers, sizeof( float *) * channels, NULL, NULL );
  96         mlt_properties_set_data( properties, "jack_input_buffers", jack_input_buffers, sizeof( float *) * channels, NULL, NULL );
  97
  98         // Start Jack processing - required before registering ports
  99         jack_activate( jack_client );
 100
 101         // Register Jack ports
 102         for ( i = 0; i < channels; i++ )
 103         {
 104                 int in;
 105
 106                 output_buffers[i] = jack_ringbuffer_create( BUFFER_LEN * sizeof(float) );
 107                 input_buffers[i] = jack_ringbuffer_create( BUFFER_LEN * sizeof(float) );
 108                 snprintf( mlt_name, sizeof( mlt_name ), "obuf%d", i );
 109                 mlt_properties_set_data( properties, mlt_name, output_buffers[i], BUFFER_LEN * sizeof(float), NULL, NULL );
 110                 snprintf( mlt_name, sizeof( mlt_name ), "ibuf%d", i );
 111                 mlt_properties_set_data( properties, mlt_name, input_buffers[i], BUFFER_LEN * sizeof(float), NULL, NULL );
 112
 113                 for ( in = 0; in < 2; in++ )
 114                 {
 115                         snprintf( mlt_name, sizeof( mlt_name ), "%s_%d", in ? "in" : "out", i + 1);
 116                         port = ( in ? &jack_input_ports[i] : &jack_output_ports[i] );
 117
 118                         *port =  jack_port_register( jack_client, mlt_name, JACK_DEFAULT_AUDIO_TYPE,
 119                                 ( in ? JackPortIsInput : JackPortIsOutput ) | JackPortIsTerminal, 0 );
 120                 }
 121         }
 122
 123         // Establish connections
 124         for ( i = 0; i < channels; i++ )
 125         {
 126                 int in;
 127                 for ( in = 0; in < 2; in++ )
 128                 {
 129                         port = ( in ? &jack_input_ports[i] : &jack_output_ports[i] );
 130                         snprintf( mlt_name, sizeof( mlt_name ), "%s", jack_port_name( *port ) );
 131
 132                         snprintf( rack_name, sizeof( rack_name ), "%s_%d", in ? "in" : "out", i + 1 );
 133                         if ( mlt_properties_get( properties, "_rack_client_name" ) )
 134                                 snprintf( rack_name, sizeof( rack_name ), "%s:%s_%d", mlt_properties_get( properties, "_rack_client_name" ), in ? "out" : "in", i + 1);
 135                         else if ( mlt_properties_get( properties, rack_name ) )
 136                                 snprintf( rack_name, sizeof( rack_name ), "%s", mlt_properties_get( properties, rack_name ) );
 137                         else
 138                                 snprintf( rack_name, sizeof( rack_name ), "%s:%s_%d", mlt_properties_get( properties, "_client_name" ), in ? "out" : "in", i + 1);
 139
 140                         if ( in )
 141                         {
 142                                 fprintf( stderr, "jack connect %s to %s\n", rack_name, mlt_name );
 143                                 jack_connect( jack_client, rack_name, mlt_name );
 144                         }
 145                         else
 146                         {
 147                                 fprintf( stderr, "jack connect %s to %s\n", mlt_name, rack_name );
 148                                 jack_connect( jack_client, mlt_name, rack_name );
 149                         }
 150                 }
 151         }
 152 }
 153
 154 static int jack_process (jack_nframes_t frames, void * data)
 155 {
 156         mlt_filter filter = (mlt_filter) data;
 157         mlt_properties properties = MLT_FILTER_PROPERTIES( filter );
 158         int channels = mlt_properties_get_int( properties, "channels" );
 159         int frame_size = mlt_properties_get_int( properties, "_samples" ) * sizeof(float);
 160         int sync = mlt_properties_get_int( properties, "_sync" );
 161         int err = 0;
 162         int i;
 163         static int total_size = 0;
 164
 165         jack_ringbuffer_t **output_buffers = mlt_properties_get_data( properties, "output_buffers", NULL );
 166         if ( output_buffers == NULL )
 167                 return 0;
 168         jack_ringbuffer_t **input_buffers = mlt_properties_get_data( properties, "input_buffers", NULL );
 169         jack_port_t **jack_output_ports = mlt_properties_get_data( properties, "jack_output_ports", NULL );
 170         jack_port_t **jack_input_ports = mlt_properties_get_data( properties, "jack_input_ports", NULL );
 171         float **jack_output_buffers = mlt_properties_get_data( properties, "jack_output_buffers", NULL );
 172         float **jack_input_buffers = mlt_properties_get_data( properties, "jack_input_buffers", NULL );
 173         pthread_mutex_t *output_lock = mlt_properties_get_data( properties, "output_lock", NULL );
 174         pthread_cond_t *output_ready = mlt_properties_get_data( properties, "output_ready", NULL );
 175
 176         for ( i = 0; i < channels; i++ )
 177         {
 178                 size_t jack_size = ( frames * sizeof(float) );
 179                 size_t ring_size;
 180
 181                 // Send audio through out port
 182                 jack_output_buffers[i] = jack_port_get_buffer( jack_output_ports[i], frames );
 183                 if ( ! jack_output_buffers[i] )
 184                 {
 185                         fprintf( stderr, "%s: no jack buffer for output port %d\n", __FUNCTION__, i );
 186                         err = 1;
 187                         break;
 188                 }
 189                 ring_size = jack_ringbuffer_read_space( output_buffers[i] );
 190                 jack_ringbuffer_read( output_buffers[i], ( char * )jack_output_buffers[i], ring_size < jack_size ? ring_size : jack_size );
 191
 192                 // Return audio through in port
 193                 jack_input_buffers[i] = jack_port_get_buffer( jack_input_ports[i], frames );
 194                 if ( ! jack_input_buffers[i] )
 195                 {
 196                         fprintf( stderr, "%s: no jack buffer for input port %d\n", __FUNCTION__, i );
 197                         err = 1;
 198                         break;
 199                 }
 200
 201                 // Do not start returning audio until we have sent first mlt frame
 202                 if ( sync && i == 0 && frame_size > 0 )
 203                         total_size += ring_size;
 204                 //fprintf(stderr, "sync %d frame_size %d ring_size %d jack_size %d\n", sync, frame_size, ring_size, jack_size );
 205
 206                 if ( ! sync || ( frame_size > 0  && total_size >= frame_size ) )
 207                 {
 208                         ring_size = jack_ringbuffer_write_space( input_buffers[i] );
 209                         jack_ringbuffer_write( input_buffers[i], ( char * )jack_input_buffers[i], ring_size < jack_size ? ring_size : jack_size );
 210
 211                         if ( sync )
 212                         {
 213                                 // Tell mlt that audio is available
 214                                 pthread_mutex_lock( output_lock);
 215                                 pthread_cond_signal( output_ready );
 216                                 pthread_mutex_unlock( output_lock);
 217
 218                                 // Clear sync phase
 219                                 mlt_properties_set_int( properties, "_sync", 0 );
 220                         }
 221                 }
 222         }
 223
 224         return err;
 225 }
 226
 227
 228 /** Get the audio.
 229 */
 230
 231 static int jackrack_get_audio( mlt_frame frame, int16_t **buffer, mlt_audio_format *format, int *frequency, int *channels, int *samples )
 232 {
 233         // Get the filter service
 234         mlt_filter filter = mlt_frame_pop_audio( frame );
 235
 236         // Get the filter properties
 237         mlt_properties filter_properties = MLT_FILTER_PROPERTIES( filter );
 238
 239         int jack_frequency = mlt_properties_get_int( filter_properties, "_sample_rate" );
 240
 241         // Get the producer's audio
 242         mlt_frame_get_audio( frame, buffer, format, &jack_frequency, channels, samples );
 243
 244         // TODO: Deal with sample rate differences
 245         if ( *frequency != jack_frequency )
 246                 fprintf( stderr, "mismatching frequencies in filter jackrack\n" );
 247         *frequency = jack_frequency;
 248
 249         // Initialise Jack ports and connections if needed
 250         if ( mlt_properties_get_int( filter_properties, "_samples" ) == 0 )
 251                 mlt_properties_set_int( filter_properties, "_samples", *samples );
 252
 253         // Get the filter-specific properties
 254         jack_ringbuffer_t **output_buffers = mlt_properties_get_data( filter_properties, "output_buffers", NULL );
 255         jack_ringbuffer_t **input_buffers = mlt_properties_get_data( filter_properties, "input_buffers", NULL );
 256         pthread_mutex_t *output_lock = mlt_properties_get_data( filter_properties, "output_lock", NULL );
 257         pthread_cond_t *output_ready = mlt_properties_get_data( filter_properties, "output_ready", NULL );
 258
 259         // Process the audio
 260         int16_t *q = *buffer;
 261         float sample[ 2 ][ 10000 ];
 262         int i, j;
 263         struct timespec tm = { 0, 0 };
 264
 265         // Convert to floats and write into output ringbuffer
 266         if ( jack_ringbuffer_write_space( output_buffers[0] ) >= ( *samples * sizeof(float) ) )
 267         {
 268                 for ( i = 0; i < *samples; i++ )
 269                         for ( j = 0; j < *channels; j++ )
 270                                 sample[ j ][ i ] = ( float )( *q ++ ) / 32768.0;
 271
 272                 for ( j = 0; j < *channels; j++ )
 273                         jack_ringbuffer_write( output_buffers[j], ( char * )sample[ j ], *samples * sizeof(float) );
 274         }
 275
 276         // Synchronization phase - wait for signal from Jack process
 277         while ( jack_ringbuffer_read_space( input_buffers[ *channels - 1 ] ) < ( *samples * sizeof(float) ) ) ;
 278                 //pthread_cond_wait( output_ready, output_lock );
 279
 280         // Read from input ringbuffer and convert from floats
 281         if ( jack_ringbuffer_read_space( input_buffers[0] ) >= ( *samples * sizeof(float) ) )
 282         {
 283                 // Initialise to silence, but repeat last frame if available in case of
 284                 // buffer underrun
 285                 for ( j = 0; j < *channels; j++ )
 286                         jack_ringbuffer_read( input_buffers[j], ( char * )sample[ j ], *samples * sizeof(float) );
 287
 288                 q = *buffer;
 289                 for ( i = 0; i < *samples; i++ )
 290                         for ( j = 0; j < *channels; j++ )
 291                         {
 292                                 if ( sample[ j ][ i ] > 1.0 )
 293                                         sample[ j ][ i ] = 1.0;
 294                                 else if ( sample[ j ][ i ] < -1.0 )
 295                                         sample[ j ][ i ] = -1.0;
 296
 297                                 if ( sample[ j ][ i ] > 0 )
 298                                         *q ++ = 32767 * sample[ j ][ i ];
 299                                 else
 300                                         *q ++ = 32768 * sample[ j ][ i ];
 301                         }
 302         }
 303
 304         return 0;
 305 }
 306
 307
 308 /** Filter processing.
 309 */
 310
 311 static mlt_frame filter_process( mlt_filter this, mlt_frame frame )
 312 {
 313         {
 314                 mlt_properties properties = MLT_FILTER_PROPERTIES( this );
 315                 mlt_frame_push_audio( frame, this );
 316                 mlt_frame_push_audio( frame, jackrack_get_audio );
 317
 318                 if ( mlt_properties_get_int( properties, "_sync" ) )
 319                         initialise_jack_ports( properties );
 320         }
 321
 322         return frame;
 323 }
 324
 325
 326 void filter_close( mlt_filter this )
 327 {
 328         int i;
 329         char mlt_name[20];
 330         mlt_properties properties = MLT_FILTER_PROPERTIES( this );
 331         jack_client_t *jack_client = mlt_properties_get_data( properties, "jack_client", NULL );
 332
 333         jack_deactivate( jack_client );
 334         jack_client_close( jack_client );
 335         for ( i = 0; i < mlt_properties_get_int( properties, "channels" ); i++ )
 336         {
 337                 snprintf( mlt_name, sizeof( mlt_name ), "obuf%d", i );
 338                 jack_ringbuffer_free( mlt_properties_get_data( properties, mlt_name, NULL ) );
 339                 snprintf( mlt_name, sizeof( mlt_name ), "ibuf%d", i );
 340                 jack_ringbuffer_free( mlt_properties_get_data( properties, mlt_name, NULL ) );
 341         }
 342         mlt_pool_release( mlt_properties_get_data( properties, "output_buffers", NULL ) );
 343         mlt_pool_release( mlt_properties_get_data( properties, "input_buffers", NULL ) );
 344         mlt_pool_release( mlt_properties_get_data( properties, "jack_output_ports", NULL ) );
 345         mlt_pool_release( mlt_properties_get_data( properties, "jack_input_ports", NULL ) );
 346         mlt_pool_release( mlt_properties_get_data( properties, "jack_output_buffers", NULL ) );
 347         mlt_pool_release( mlt_properties_get_data( properties, "jack_input_buffers", NULL ) );
 348         mlt_pool_release( mlt_properties_get_data( properties, "output_lock", NULL ) );
 349         mlt_pool_release( mlt_properties_get_data( properties, "output_ready", NULL ) );
 350
 351         pthread_t *jackrack_pthread = mlt_properties_get_data( properties, "jackrack_thread", NULL );
 352         if ( jackrack_pthread != NULL )
 353         {
 354                 mlt_properties_set_int( properties, "_done", 1 );
 355                 pthread_join( *jackrack_pthread, NULL );
 356                 mlt_pool_release( jackrack_pthread );
 357         }
 358
 359         this->parent.close = NULL;
 360         mlt_service_close( &this->parent );
 361 }
 362
 363 /** Constructor for the filter.
 364 */
 365
 366 mlt_filter filter_jackrack_init( char *arg )
 367 {
 368         mlt_filter this = mlt_filter_new( );
 369         if ( this != NULL )
 370         {
 371                 char name[14];
 372
 373                 snprintf( name, sizeof( name ), "mlt%d", getpid() );
 374                 jack_client_t *jack_client = jack_client_new( name );
 375                 if ( jack_client )
 376                 {
 377                         mlt_properties properties = MLT_FILTER_PROPERTIES( this );
 378                         pthread_mutex_t *output_lock = mlt_pool_alloc( sizeof( pthread_mutex_t ) );
 379                         pthread_cond_t  *output_ready = mlt_pool_alloc( sizeof( pthread_cond_t ) );
 380
 381                         jack_set_process_callback( jack_client, jack_process, this );
 382                         //TODO: jack_on_shutdown( jack_client, jack_shutdown_cb, this );
 383                         this->process = filter_process;
 384                         this->close = filter_close;
 385                         pthread_mutex_init( output_lock, NULL );
 386                         pthread_cond_init( output_ready, NULL );
 387
 388                         mlt_properties_set( properties, "src", arg );
 389                         mlt_properties_set( properties, "_client_name", name );
 390                         mlt_properties_set_data( properties, "jack_client", jack_client, 0, NULL, NULL );
 391                         mlt_properties_set_int( properties, "_sample_rate", jack_get_sample_rate( jack_client ) );
 392                         mlt_properties_set_data( properties, "output_lock", output_lock, 0, NULL, NULL );
 393                         mlt_properties_set_data( properties, "output_ready", output_ready, 0, NULL, NULL );
 394                         mlt_properties_set_int( properties, "_sync", 1 );
 395                         mlt_properties_set_int( properties, "channels", 2 );
 396                 }
 397         }
 398         return this;
 399 }