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 "jack_rack.h"
  36
  37 #define BUFFER_LEN 204800 * 3
  38
  39 static void initialise_jack_ports( mlt_properties properties )
  40 {
  41         int i;
  42         char mlt_name[20], rack_name[30];
  43         jack_port_t **port = NULL;
  44         jack_client_t *jack_client = mlt_properties_get_data( properties, "jack_client", NULL );
  45         jack_nframes_t jack_buffer_size = jack_get_buffer_size( jack_client );
  46
  47         // Propogate these for the Jack processing callback
  48         int channels = mlt_properties_get_int( properties, "channels" );
  49
  50         // Start JackRack
  51         if ( mlt_properties_get( properties, "src" ) )
  52         {
  53                 snprintf( rack_name, sizeof( rack_name ), "jackrack%d", getpid() );
  54                 jack_rack_t *jackrack = jack_rack_new( rack_name, mlt_properties_get_int( properties, "channels" ) );
  55                 jack_rack_open_file( jackrack, mlt_properties_get( properties, "src" ) );
  56
  57                 mlt_properties_set_data( properties, "jackrack", jackrack, 0, NULL, NULL );
  58                 mlt_properties_set( properties, "_rack_client_name", rack_name );
  59         }
  60
  61         // Allocate buffers and ports
  62         jack_ringbuffer_t **output_buffers = mlt_pool_alloc( sizeof( jack_ringbuffer_t *) * channels );
  63         jack_ringbuffer_t **input_buffers = mlt_pool_alloc( sizeof( jack_ringbuffer_t *) * channels );
  64         jack_port_t **jack_output_ports = mlt_pool_alloc( sizeof(jack_port_t *) * channels );
  65         jack_port_t **jack_input_ports = mlt_pool_alloc( sizeof(jack_port_t *) * channels );
  66         float **jack_output_buffers = mlt_pool_alloc( sizeof(float *) * jack_buffer_size );
  67         float **jack_input_buffers = mlt_pool_alloc( sizeof(float *) * jack_buffer_size );
  68
  69         // Set properties - released inside filter_close
  70         mlt_properties_set_data( properties, "output_buffers", output_buffers, sizeof( jack_ringbuffer_t *) * channels, NULL, NULL );
  71         mlt_properties_set_data( properties, "input_buffers", input_buffers, sizeof( jack_ringbuffer_t *) * channels, NULL, NULL );
  72         mlt_properties_set_data( properties, "jack_output_ports", jack_output_ports, sizeof( jack_port_t *) * channels, NULL, NULL );
  73         mlt_properties_set_data( properties, "jack_input_ports", jack_input_ports, sizeof( jack_port_t *) * channels, NULL, NULL );
  74         mlt_properties_set_data( properties, "jack_output_buffers", jack_output_buffers, sizeof( float *) * channels, NULL, NULL );
  75         mlt_properties_set_data( properties, "jack_input_buffers", jack_input_buffers, sizeof( float *) * channels, NULL, NULL );
  76
  77         // Start Jack processing - required before registering ports
  78         jack_activate( jack_client );
  79
  80         // Register Jack ports
  81         for ( i = 0; i < channels; i++ )
  82         {
  83                 int in;
  84
  85                 output_buffers[i] = jack_ringbuffer_create( BUFFER_LEN * sizeof(float) );
  86                 input_buffers[i] = jack_ringbuffer_create( BUFFER_LEN * sizeof(float) );
  87                 snprintf( mlt_name, sizeof( mlt_name ), "obuf%d", i );
  88                 mlt_properties_set_data( properties, mlt_name, output_buffers[i], BUFFER_LEN * sizeof(float), NULL, NULL );
  89                 snprintf( mlt_name, sizeof( mlt_name ), "ibuf%d", i );
  90                 mlt_properties_set_data( properties, mlt_name, input_buffers[i], BUFFER_LEN * sizeof(float), NULL, NULL );
  91
  92                 for ( in = 0; in < 2; in++ )
  93                 {
  94                         snprintf( mlt_name, sizeof( mlt_name ), "%s_%d", in ? "in" : "out", i + 1);
  95                         port = ( in ? &jack_input_ports[i] : &jack_output_ports[i] );
  96
  97                         *port =  jack_port_register( jack_client, mlt_name, JACK_DEFAULT_AUDIO_TYPE,
  98                                 ( in ? JackPortIsInput : JackPortIsOutput ) | JackPortIsTerminal, 0 );
  99                 }
 100         }
 101
 102         // Establish connections
 103         for ( i = 0; i < channels; i++ )
 104         {
 105                 int in;
 106                 for ( in = 0; in < 2; in++ )
 107                 {
 108                         port = ( in ? &jack_input_ports[i] : &jack_output_ports[i] );
 109                         snprintf( mlt_name, sizeof( mlt_name ), "%s", jack_port_name( *port ) );
 110
 111                         snprintf( rack_name, sizeof( rack_name ), "%s_%d", in ? "in" : "out", i + 1 );
 112                         if ( mlt_properties_get( properties, "_rack_client_name" ) )
 113                                 snprintf( rack_name, sizeof( rack_name ), "%s:%s_%d", mlt_properties_get( properties, "_rack_client_name" ), in ? "out" : "in", i + 1);
 114                         else if ( mlt_properties_get( properties, rack_name ) )
 115                                 snprintf( rack_name, sizeof( rack_name ), "%s", mlt_properties_get( properties, rack_name ) );
 116                         else
 117                                 snprintf( rack_name, sizeof( rack_name ), "%s:%s_%d", mlt_properties_get( properties, "_client_name" ), in ? "out" : "in", i + 1);
 118
 119                         if ( in )
 120                         {
 121                                 fprintf( stderr, "jack connect %s to %s\n", rack_name, mlt_name );
 122                                 jack_connect( jack_client, rack_name, mlt_name );
 123                         }
 124                         else
 125                         {
 126                                 fprintf( stderr, "jack connect %s to %s\n", mlt_name, rack_name );
 127                                 jack_connect( jack_client, mlt_name, rack_name );
 128                         }
 129                 }
 130         }
 131 }
 132
 133 static int jack_process (jack_nframes_t frames, void * data)
 134 {
 135         mlt_filter filter = (mlt_filter) data;
 136         mlt_properties properties = MLT_FILTER_PROPERTIES( filter );
 137         int channels = mlt_properties_get_int( properties, "channels" );
 138         int frame_size = mlt_properties_get_int( properties, "_samples" ) * sizeof(float);
 139         int sync = mlt_properties_get_int( properties, "_sync" );
 140         int err = 0;
 141         int i;
 142         static int total_size = 0;
 143
 144         jack_ringbuffer_t **output_buffers = mlt_properties_get_data( properties, "output_buffers", NULL );
 145         if ( output_buffers == NULL )
 146                 return 0;
 147         jack_ringbuffer_t **input_buffers = mlt_properties_get_data( properties, "input_buffers", NULL );
 148         jack_port_t **jack_output_ports = mlt_properties_get_data( properties, "jack_output_ports", NULL );
 149         jack_port_t **jack_input_ports = mlt_properties_get_data( properties, "jack_input_ports", NULL );
 150         float **jack_output_buffers = mlt_properties_get_data( properties, "jack_output_buffers", NULL );
 151         float **jack_input_buffers = mlt_properties_get_data( properties, "jack_input_buffers", NULL );
 152         pthread_mutex_t *output_lock = mlt_properties_get_data( properties, "output_lock", NULL );
 153         pthread_cond_t *output_ready = mlt_properties_get_data( properties, "output_ready", NULL );
 154
 155         for ( i = 0; i < channels; i++ )
 156         {
 157                 size_t jack_size = ( frames * sizeof(float) );
 158                 size_t ring_size;
 159
 160                 // Send audio through out port
 161                 jack_output_buffers[i] = jack_port_get_buffer( jack_output_ports[i], frames );
 162                 if ( ! jack_output_buffers[i] )
 163                 {
 164                         fprintf( stderr, "%s: no jack buffer for output port %d\n", __FUNCTION__, i );
 165                         err = 1;
 166                         break;
 167                 }
 168                 ring_size = jack_ringbuffer_read_space( output_buffers[i] );
 169                 jack_ringbuffer_read( output_buffers[i], ( char * )jack_output_buffers[i], ring_size < jack_size ? ring_size : jack_size );
 170
 171                 // Return audio through in port
 172                 jack_input_buffers[i] = jack_port_get_buffer( jack_input_ports[i], frames );
 173                 if ( ! jack_input_buffers[i] )
 174                 {
 175                         fprintf( stderr, "%s: no jack buffer for input port %d\n", __FUNCTION__, i );
 176                         err = 1;
 177                         break;
 178                 }
 179
 180                 // Do not start returning audio until we have sent first mlt frame
 181                 if ( sync && i == 0 && frame_size > 0 )
 182                         total_size += ring_size;
 183                 //fprintf(stderr, "sync %d frame_size %d ring_size %d jack_size %d\n", sync, frame_size, ring_size, jack_size );
 184
 185                 if ( ! sync || ( frame_size > 0  && total_size >= frame_size ) )
 186                 {
 187                         ring_size = jack_ringbuffer_write_space( input_buffers[i] );
 188                         jack_ringbuffer_write( input_buffers[i], ( char * )jack_input_buffers[i], ring_size < jack_size ? ring_size : jack_size );
 189
 190                         if ( sync )
 191                         {
 192                                 // Tell mlt that audio is available
 193                                 pthread_mutex_lock( output_lock);
 194                                 pthread_cond_signal( output_ready );
 195                                 pthread_mutex_unlock( output_lock);
 196
 197                                 // Clear sync phase
 198                                 mlt_properties_set_int( properties, "_sync", 0 );
 199                         }
 200                 }
 201         }
 202
 203         return err;
 204 }
 205
 206
 207 /** Get the audio.
 208 */
 209
 210 static int jackrack_get_audio( mlt_frame frame, int16_t **buffer, mlt_audio_format *format, int *frequency, int *channels, int *samples )
 211 {
 212         // Get the filter service
 213         mlt_filter filter = mlt_frame_pop_audio( frame );
 214
 215         // Get the filter properties
 216         mlt_properties filter_properties = MLT_FILTER_PROPERTIES( filter );
 217
 218         int jack_frequency = mlt_properties_get_int( filter_properties, "_sample_rate" );
 219
 220         // Get the producer's audio
 221         mlt_frame_get_audio( frame, buffer, format, &jack_frequency, channels, samples );
 222
 223         // TODO: Deal with sample rate differences
 224         if ( *frequency != jack_frequency )
 225                 fprintf( stderr, "mismatching frequencies in filter jackrack\n" );
 226         *frequency = jack_frequency;
 227
 228         // Initialise Jack ports and connections if needed
 229         if ( mlt_properties_get_int( filter_properties, "_samples" ) == 0 )
 230                 mlt_properties_set_int( filter_properties, "_samples", *samples );
 231
 232         // Get the filter-specific properties
 233         jack_ringbuffer_t **output_buffers = mlt_properties_get_data( filter_properties, "output_buffers", NULL );
 234         jack_ringbuffer_t **input_buffers = mlt_properties_get_data( filter_properties, "input_buffers", NULL );
 235 //      pthread_mutex_t *output_lock = mlt_properties_get_data( filter_properties, "output_lock", NULL );
 236 //      pthread_cond_t *output_ready = mlt_properties_get_data( filter_properties, "output_ready", NULL );
 237
 238         // Process the audio
 239         int16_t *q = *buffer;
 240         float sample[ 2 ][ 10000 ];
 241         int i, j;
 242 //      struct timespec tm = { 0, 0 };
 243
 244         // Convert to floats and write into output ringbuffer
 245         if ( jack_ringbuffer_write_space( output_buffers[0] ) >= ( *samples * sizeof(float) ) )
 246         {
 247                 for ( i = 0; i < *samples; i++ )
 248                         for ( j = 0; j < *channels; j++ )
 249                                 sample[ j ][ i ] = ( float )( *q ++ ) / 32768.0;
 250
 251                 for ( j = 0; j < *channels; j++ )
 252                         jack_ringbuffer_write( output_buffers[j], ( char * )sample[ j ], *samples * sizeof(float) );
 253         }
 254
 255         // Synchronization phase - wait for signal from Jack process
 256         while ( jack_ringbuffer_read_space( input_buffers[ *channels - 1 ] ) < ( *samples * sizeof(float) ) ) ;
 257                 //pthread_cond_wait( output_ready, output_lock );
 258
 259         // Read from input ringbuffer and convert from floats
 260         if ( jack_ringbuffer_read_space( input_buffers[0] ) >= ( *samples * sizeof(float) ) )
 261         {
 262                 // Initialise to silence, but repeat last frame if available in case of
 263                 // buffer underrun
 264                 for ( j = 0; j < *channels; j++ )
 265                         jack_ringbuffer_read( input_buffers[j], ( char * )sample[ j ], *samples * sizeof(float) );
 266
 267                 q = *buffer;
 268                 for ( i = 0; i < *samples; i++ )
 269                         for ( j = 0; j < *channels; j++ )
 270                         {
 271                                 if ( sample[ j ][ i ] > 1.0 )
 272                                         sample[ j ][ i ] = 1.0;
 273                                 else if ( sample[ j ][ i ] < -1.0 )
 274                                         sample[ j ][ i ] = -1.0;
 275
 276                                 if ( sample[ j ][ i ] > 0 )
 277                                         *q ++ = 32767 * sample[ j ][ i ];
 278                                 else
 279                                         *q ++ = 32768 * sample[ j ][ i ];
 280                         }
 281         }
 282
 283         return 0;
 284 }
 285
 286
 287 /** Filter processing.
 288 */
 289
 290 static mlt_frame filter_process( mlt_filter this, mlt_frame frame )
 291 {
 292         {
 293                 mlt_properties properties = MLT_FILTER_PROPERTIES( this );
 294                 mlt_frame_push_audio( frame, this );
 295                 mlt_frame_push_audio( frame, jackrack_get_audio );
 296
 297                 if ( mlt_properties_get_int( properties, "_sync" ) )
 298                         initialise_jack_ports( properties );
 299         }
 300
 301         return frame;
 302 }
 303
 304
 305 static void filter_close( mlt_filter this )
 306 {
 307         int i;
 308         char mlt_name[20];
 309         mlt_properties properties = MLT_FILTER_PROPERTIES( this );
 310         jack_client_t *jack_client = mlt_properties_get_data( properties, "jack_client", NULL );
 311
 312         jack_deactivate( jack_client );
 313         jack_client_close( jack_client );
 314         for ( i = 0; i < mlt_properties_get_int( properties, "channels" ); i++ )
 315         {
 316                 snprintf( mlt_name, sizeof( mlt_name ), "obuf%d", i );
 317                 jack_ringbuffer_free( mlt_properties_get_data( properties, mlt_name, NULL ) );
 318                 snprintf( mlt_name, sizeof( mlt_name ), "ibuf%d", i );
 319                 jack_ringbuffer_free( mlt_properties_get_data( properties, mlt_name, NULL ) );
 320         }
 321         mlt_pool_release( mlt_properties_get_data( properties, "output_buffers", NULL ) );
 322         mlt_pool_release( mlt_properties_get_data( properties, "input_buffers", NULL ) );
 323         mlt_pool_release( mlt_properties_get_data( properties, "jack_output_ports", NULL ) );
 324         mlt_pool_release( mlt_properties_get_data( properties, "jack_input_ports", NULL ) );
 325         mlt_pool_release( mlt_properties_get_data( properties, "jack_output_buffers", NULL ) );
 326         mlt_pool_release( mlt_properties_get_data( properties, "jack_input_buffers", NULL ) );
 327         mlt_pool_release( mlt_properties_get_data( properties, "output_lock", NULL ) );
 328         mlt_pool_release( mlt_properties_get_data( properties, "output_ready", NULL ) );
 329
 330         jack_rack_t *jackrack = mlt_properties_get_data( properties, "jackrack", NULL );
 331         jack_rack_destroy( jackrack );
 332
 333         this->parent.close = NULL;
 334         mlt_service_close( &this->parent );
 335 }
 336
 337 /** Constructor for the filter.
 338 */
 339
 340 mlt_filter filter_jackrack_init( char *arg )
 341 {
 342         mlt_filter this = mlt_filter_new( );
 343         if ( this != NULL )
 344         {
 345                 char name[14];
 346
 347                 snprintf( name, sizeof( name ), "mlt%d", getpid() );
 348                 jack_client_t *jack_client = jack_client_new( name );
 349                 if ( jack_client )
 350                 {
 351                         mlt_properties properties = MLT_FILTER_PROPERTIES( this );
 352                         pthread_mutex_t *output_lock = mlt_pool_alloc( sizeof( pthread_mutex_t ) );
 353                         pthread_cond_t  *output_ready = mlt_pool_alloc( sizeof( pthread_cond_t ) );
 354
 355                         jack_set_process_callback( jack_client, jack_process, this );
 356                         //TODO: jack_on_shutdown( jack_client, jack_shutdown_cb, this );
 357                         this->process = filter_process;
 358                         this->close = filter_close;
 359                         pthread_mutex_init( output_lock, NULL );
 360                         pthread_cond_init( output_ready, NULL );
 361
 362                         mlt_properties_set( properties, "src", arg );
 363                         mlt_properties_set( properties, "_client_name", name );
 364                         mlt_properties_set_data( properties, "jack_client", jack_client, 0, NULL, NULL );
 365                         mlt_properties_set_int( properties, "_sample_rate", jack_get_sample_rate( jack_client ) );
 366                         mlt_properties_set_data( properties, "output_lock", output_lock, 0, NULL, NULL );
 367                         mlt_properties_set_data( properties, "output_ready", output_ready, 0, NULL, NULL );
 368                         mlt_properties_set_int( properties, "_sync", 1 );
 369                         mlt_properties_set_int( properties, "channels", 2 );
 370                 }
 371         }
 372         return this;
 373 }