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 <samplerate.h>
  28 #define __USE_ISOC99 1
  29 #include <math.h>
  30 #include <sys/types.h>
  31 #include <unistd.h>
  32 #include <jack/jack.h>
  33 #include <jack/ringbuffer.h>
  34 #include <pthread.h>
  35 #include <string.h>
  36
  37 #include "ui.h"
  38
  39 #define BUFFER_LEN 2048 * 20
  40
  41 static void *jackrack_thread( void *arg )
  42 {
  43         mlt_properties properties = arg;
  44         ui_t *jackrack = mlt_properties_get_data( properties, "jackrack", NULL );
  45
  46         while ( mlt_properties_get_int( properties, "_done" ) == 0 )
  47                 if ( ui_loop_iterate( jackrack ) )
  48                         break;
  49
  50         ui_quit( jackrack );
  51         ui_destroy( jackrack );
  52
  53         return NULL;
  54 }
  55
  56 static void initialise_jack_ports( mlt_properties properties, int channels, int samples )
  57 {
  58         int i;
  59         char mlt_name[20], rack_name[30];
  60         jack_port_t **port = NULL;
  61         jack_client_t *jack_client = mlt_properties_get_data( properties, "jack_client", NULL );
  62         jack_nframes_t jack_buffer_size = jack_get_buffer_size( jack_client );
  63
  64         // Propogate these for the Jack processing callback
  65         mlt_properties_set_int( properties, "_channels", channels );
  66         mlt_properties_set_int( properties, "_samples", samples );
  67
  68         // Start JackRack
  69         if ( mlt_properties_get( properties, "src" ) )
  70         {
  71                 pthread_t *jackrack_pthread = calloc( 1, sizeof( pthread_t ) );
  72
  73                 snprintf( rack_name, sizeof( rack_name ), "jackrack%d", getpid() );
  74                 ui_t *jackrack = ui_new( rack_name, mlt_properties_get_int( properties, "_channels" ), 0, 0 );
  75                 jack_rack_open_file( jackrack, mlt_properties_get( properties, "src" ) );
  76
  77                 mlt_properties_set_data( properties, "jackrack", jackrack, 0, NULL, NULL );
  78                 mlt_properties_set( properties, "_rack_client_name", rack_name );
  79                 mlt_properties_set_int( properties, "_done", 0 );
  80                 mlt_properties_set_data( properties, "jackrack_pthread", jackrack_pthread, 0, NULL, NULL );
  81
  82                 pthread_create( jackrack_pthread, NULL, jackrack_thread, properties );
  83         }
  84
  85         // Allocate buffers and ports
  86         jack_ringbuffer_t **output_buffers = mlt_pool_alloc( sizeof( jack_ringbuffer_t *) * channels );
  87         jack_ringbuffer_t **input_buffers = mlt_pool_alloc( sizeof( jack_ringbuffer_t *) * channels );
  88         jack_port_t **jack_output_ports = mlt_pool_alloc( sizeof(jack_port_t *) * channels );
  89         jack_port_t **jack_input_ports = mlt_pool_alloc( sizeof(jack_port_t *) * channels );
  90         float **jack_output_buffers = mlt_pool_alloc( sizeof(float *) * jack_buffer_size );
  91         float **jack_input_buffers = mlt_pool_alloc( sizeof(float *) * jack_buffer_size );
  92
  93         // Set properties for self-destruction
  94         mlt_properties_set_data( properties, "output_buffers", output_buffers, sizeof( jack_ringbuffer_t *) * channels, mlt_pool_release, NULL );
  95         mlt_properties_set_data( properties, "input_buffers", input_buffers, sizeof( jack_ringbuffer_t *) * channels, mlt_pool_release, NULL );
  96         mlt_properties_set_data( properties, "jack_output_ports", jack_output_ports, sizeof( jack_port_t *) * channels, mlt_pool_release, NULL );
  97         mlt_properties_set_data( properties, "jack_input_ports", jack_input_ports, sizeof( jack_port_t *) * channels, mlt_pool_release, NULL );
  98         mlt_properties_set_data( properties, "jack_output_buffers", jack_output_buffers, sizeof( float *) * channels, mlt_pool_release, NULL );
  99         mlt_properties_set_data( properties, "jack_input_buffers", jack_input_buffers, sizeof( float *) * channels, mlt_pool_release, NULL );
 100
 101         // Start Jack processing - required before registering ports
 102         jack_activate( jack_client );
 103
 104         // Register Jack ports
 105         for ( i = 0; i < channels; i++ )
 106         {
 107                 int in;
 108
 109                 output_buffers[i] = jack_ringbuffer_create( BUFFER_LEN * sizeof(float) );
 110                 input_buffers[i] = jack_ringbuffer_create( BUFFER_LEN * sizeof(float) );
 111                 snprintf( mlt_name, sizeof( mlt_name ), "obuf%d", i );
 112                 mlt_properties_set_data( properties, mlt_name, output_buffers[i], BUFFER_LEN * sizeof(float), ( mlt_destructor )jack_ringbuffer_free, NULL );
 113                 snprintf( mlt_name, sizeof( mlt_name ), "ibuf%d", i );
 114                 mlt_properties_set_data( properties, mlt_name, input_buffers[i], BUFFER_LEN * sizeof(float), ( mlt_destructor )jack_ringbuffer_free, NULL );
 115
 116                 for ( in = 0; in < 2; in++ )
 117                 {
 118                         snprintf( mlt_name, sizeof( mlt_name ), "%s_%d", in ? "in" : "out", i + 1);
 119                         port = ( in ? &jack_input_ports[i] : &jack_output_ports[i] );
 120
 121                         *port =  jack_port_register( jack_client, mlt_name, JACK_DEFAULT_AUDIO_TYPE,
 122                                 ( in ? JackPortIsInput : JackPortIsOutput ) | JackPortIsTerminal, 0 );
 123                 }
 124         }
 125
 126         // Establish connections
 127         for ( i = 0; i < channels; i++ )
 128         {
 129                 int in;
 130                 for ( in = 0; in < 2; in++ )
 131                 {
 132                         port = ( in ? &jack_input_ports[i] : &jack_output_ports[i] );
 133                         snprintf( mlt_name, sizeof( mlt_name ), "%s", jack_port_name( *port ) );
 134
 135                         snprintf( rack_name, sizeof( rack_name ), "%s_%d", in ? "in" : "out", i + 1 );
 136                         if ( mlt_properties_get( properties, "_rack_client_name" ) )
 137                                 snprintf( rack_name, sizeof( rack_name ), "%s:%s_%d", mlt_properties_get( properties, "_rack_client_name" ), in ? "out" : "in", i + 1);
 138                         else if ( mlt_properties_get( properties, rack_name ) )
 139                                 snprintf( rack_name, sizeof( rack_name ), "%s", mlt_properties_get( properties, rack_name ) );
 140                         else
 141                                 snprintf( rack_name, sizeof( rack_name ), "%s:%s_%d", mlt_properties_get( properties, "_client_name" ), in ? "out" : "in", i + 1);
 142
 143                         if ( in )
 144                         {
 145                                 fprintf( stderr, "jack connect %s to %s\n", rack_name, mlt_name );
 146                                 jack_connect( jack_client, rack_name, mlt_name );
 147                         }
 148                         else
 149                         {
 150                                 fprintf( stderr, "jack connect %s to %s\n", mlt_name, rack_name );
 151                                 jack_connect( jack_client, mlt_name, rack_name );
 152                         }
 153                 }
 154         }
 155 }
 156
 157 static int jack_process (jack_nframes_t frames, void * data)
 158 {
 159         mlt_filter filter = (mlt_filter) data;
 160         mlt_properties properties = MLT_FILTER_PROPERTIES( filter );
 161         int channels = mlt_properties_get_int( properties, "_channels" );
 162         int err = 0;
 163         int i;
 164         static size_t total_size = 0;
 165         size_t first_ring_size = mlt_properties_get_int( properties, "_samples" ) * sizeof(float);
 166
 167         jack_ringbuffer_t **output_buffers = mlt_properties_get_data( properties, "output_buffers", NULL );
 168         if ( output_buffers == NULL )
 169                 return 0;
 170         jack_ringbuffer_t **input_buffers = mlt_properties_get_data( properties, "input_buffers", NULL );
 171         jack_port_t **jack_output_ports = mlt_properties_get_data( properties, "jack_output_ports", NULL );
 172         jack_port_t **jack_input_ports = mlt_properties_get_data( properties, "jack_input_ports", NULL );
 173         float **jack_output_buffers = mlt_properties_get_data( properties, "jack_output_buffers", NULL );
 174         float **jack_input_buffers = mlt_properties_get_data( properties, "jack_input_buffers", NULL );
 175         pthread_mutex_t *output_lock = mlt_properties_get_data( properties, "output_lock", NULL );
 176         pthread_cond_t *output_ready = mlt_properties_get_data( properties, "output_ready", NULL );
 177
 178         for ( i = 0; i < channels; i++ )
 179         {
 180                 size_t jack_size = ( frames * sizeof(float) );
 181                 size_t ring_size;
 182
 183                 // Send audio through out port
 184                 jack_output_buffers[i] = jack_port_get_buffer( jack_output_ports[i], frames );
 185                 if ( ! jack_output_buffers[i] )
 186                 {
 187                         fprintf( stderr, "%s: no jack buffer for output port %d\n", __FUNCTION__, i );
 188                         err = 1;
 189                         break;
 190                 }
 191                 ring_size = jack_ringbuffer_read_space( output_buffers[i] );
 192                 jack_ringbuffer_read( output_buffers[i], ( char * )jack_output_buffers[i], ring_size < jack_size ? ring_size : jack_size );
 193
 194                 // Do not start returning audio until we have sent first mlt frame
 195                 if ( first_ring_size != -sizeof(float) && i == 0 )
 196                         total_size += ring_size;
 197                 if ( first_ring_size == -sizeof(float) || total_size >= first_ring_size )
 198                 {
 199                         // Return audio through in port
 200                         jack_input_buffers[i] = jack_port_get_buffer( jack_input_ports[i], frames );
 201                         if ( ! jack_input_buffers[i] )
 202                         {
 203                                 fprintf( stderr, "%s: no jack buffer for input port %d\n", __FUNCTION__, i );
 204                                 err = 1;
 205                                 break;
 206                         }
 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                         // Tell mlt that audio is available
 212                         if ( first_ring_size != -sizeof(float) && i == ( channels - 1 )
 213                                  && pthread_mutex_trylock( output_lock) == 0 )
 214                         {
 215                                 pthread_cond_signal( output_ready );
 216                                 pthread_mutex_unlock( output_lock );
 217                         }
 218
 219                         // Set flag to skip this henceforth
 220                         mlt_properties_set_int( properties, "_samples", -1 );
 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         // Restore the original get_audio
 240         frame->get_audio = mlt_frame_pop_audio( frame );
 241
 242         // Get the producer's audio
 243         mlt_frame_get_audio( frame, buffer, format, frequency, channels, samples );
 244         //fprintf( stderr, "%s: %d frames %d channels\n", __FUNCTION__, *samples, *channels );
 245
 246         // Initialise Jack ports and connections if needed
 247         if ( ! mlt_properties_get_data( filter_properties, "jack_output_ports", NULL ) )
 248                 initialise_jack_ports( filter_properties, *channels, *samples );
 249
 250         // Get the filter-specific properties
 251         jack_ringbuffer_t **output_buffers = mlt_properties_get_data( filter_properties, "output_buffers", NULL );
 252         jack_ringbuffer_t **input_buffers = mlt_properties_get_data( filter_properties, "input_buffers", NULL );
 253         pthread_mutex_t *output_lock = mlt_properties_get_data( filter_properties, "output_lock", NULL );
 254         pthread_cond_t *output_ready = mlt_properties_get_data( filter_properties, "output_ready", NULL );
 255
 256         // Process the audio
 257         int16_t *q = *buffer;
 258         float sample;
 259         int i, j;
 260
 261         // Convert to floats and write into output ringbuffer
 262         if ( jack_ringbuffer_write_space( output_buffers[0] ) >= ( *samples * sizeof(float) ) )
 263         {
 264                 //fprintf( stderr, "%s: buffer overrun!\n", __FUNCTION__ );
 265                 //pthread_cond_wait( &output_ready, &output_lock );
 266                 for ( i = 0; i < *samples; i++ )
 267                         for ( j = 0; j < *channels; j++ )
 268                         {
 269                                 sample = ( float )( *q ++ ) / 32768.0;
 270                                 jack_ringbuffer_write( output_buffers[j], ( char * )&sample, sizeof(float) );
 271                         }
 272         }
 273         //else
 274         //      fprintf( stderr, "%s: out buffer size %d\n", __FUNCTION__, jack_ringbuffer_write_space( output_buffers[0] ) );
 275
 276         // Read from input ringbuffer and convert from floats
 277         while ( mlt_properties_get_int( filter_properties, "_samples" ) != -1
 278                     && jack_ringbuffer_read_space( input_buffers[ *channels - 1 ] ) < ( *samples * sizeof(float) ) )
 279                 pthread_cond_wait( output_ready, output_lock );
 280
 281         q = *buffer;
 282
 283         // Initialise to silence, but repeat last frame if available in case of
 284         // buffer underrun
 285         sample = 0;
 286
 287         for ( i = 0; i < *samples; i++ )
 288                 for ( j = 0; j < *channels; j++ )
 289                 {
 290                         jack_ringbuffer_read( input_buffers[j], ( char * )&sample, sizeof(float) );
 291
 292                         if ( sample > 1.0 )
 293                                 sample = 1.0;
 294                         else if ( sample < -1.0 )
 295                                 sample = -1.0;
 296
 297                         if ( sample > 0 )
 298                                 *q ++ = 32767 * sample;
 299                         else
 300                                 *q ++ = 32768 * sample;
 301                 }
 302
 303         return 0;
 304 }
 305
 306
 307 /** Filter processing.
 308 */
 309
 310 static mlt_frame filter_process( mlt_filter this, mlt_frame frame )
 311 {
 312         if ( frame->get_audio != NULL )
 313         {
 314                 mlt_frame_push_audio( frame, frame->get_audio );
 315                 mlt_frame_push_audio( frame, this );
 316                 frame->get_audio = jackrack_get_audio;
 317         }
 318
 319         return frame;
 320 }
 321
 322
 323 void filter_close( mlt_filter this )
 324 {
 325         mlt_properties properties = MLT_FILTER_PROPERTIES( this );
 326         jack_client_t *jack_client = mlt_properties_get_data( properties, "jack_client", NULL );
 327
 328         jack_deactivate( jack_client );
 329         jack_client_close( jack_client );
 330         pthread_t *jackrack_pthread = mlt_properties_get_data( properties, "jackrack_thread", NULL );
 331         if ( jackrack_pthread != NULL )
 332         {
 333                 mlt_properties_set_int( properties, "_done", 1 );
 334                 pthread_join( *jackrack_pthread, NULL );
 335                 free( jackrack_pthread );
 336         }
 337 }
 338
 339 /** Constructor for the filter.
 340 */
 341
 342 mlt_filter filter_jackrack_init( char *arg )
 343 {
 344         mlt_filter this = mlt_filter_new( );
 345         if ( this != NULL )
 346         {
 347                 char name[14];
 348
 349                 snprintf( name, sizeof( name ), "mlt%d", getpid() );
 350                 jack_client_t *jack_client = jack_client_new( name );
 351                 if ( jack_client )
 352                 {
 353                         mlt_properties properties = MLT_FILTER_PROPERTIES( this );
 354                         pthread_mutex_t *output_lock = calloc( 1, sizeof( pthread_mutex_t ) );
 355                         pthread_cond_t  *output_ready = calloc( 1, sizeof( pthread_cond_t ) );
 356
 357                         jack_set_process_callback( jack_client, jack_process, this );
 358                         //TODO: jack_on_shutdown( jack_client, jack_shutdown_cb, this );
 359                         this->process = filter_process;
 360                         pthread_mutex_init( output_lock, NULL );
 361                         pthread_cond_init( output_ready, NULL );
 362
 363                         mlt_properties_set( properties, "src", arg );
 364                         mlt_properties_set( properties, "_client_name", name );
 365                         mlt_properties_set_data( properties, "jack_client", jack_client, 0, ( mlt_destructor )filter_close, NULL );
 366                         mlt_properties_set_int( properties, "_sample_rate", jack_get_sample_rate( jack_client ) );
 367                         mlt_properties_set_data( properties, "output_lock", output_lock, 0, free, NULL );
 368                         mlt_properties_set_data( properties, "output_ready", output_ready, 0, free, NULL );
 369                 }
 370         }
 371         return this;
 372 }