--- /dev/null
+/*****************************************************************************
+ * jack : JACK audio output module
+ *****************************************************************************
+ * Copyright (C) 2006 the VideoLAN team
+ * $Id$
+ *
+ * Authors: Cyril Deguet <asmax@videolan.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111, USA.
+ *****************************************************************************/
+
+/*****************************************************************************
+ * Preamble
+ *****************************************************************************/
+#include <errno.h> /* ENOMEM */
+#include <fcntl.h> /* open(), O_WRONLY */
+#include <string.h> /* strerror() */
+#include <unistd.h> /* write(), close() */
+#include <stdlib.h> /* calloc(), malloc(), free() */
+
+#include <vlc/vlc.h>
+#include <vlc/aout.h>
+
+#include "aout_internal.h"
+
+#include <jack/jack.h>
+
+/*****************************************************************************
+ * aout_sys_t: JACK audio output method descriptor
+ *****************************************************************************
+ * This structure is part of the audio output thread descriptor.
+ * It describes some JACK specific variables.
+ *****************************************************************************/
+struct aout_sys_t
+{
+ jack_client_t *p_jack_client;
+ jack_port_t *p_jack_port[2];
+ unsigned int i_channels;
+};
+
+/*****************************************************************************
+ * Local prototypes
+ *****************************************************************************/
+static int Open ( vlc_object_t * );
+static void Close ( vlc_object_t * );
+static void Play ( aout_instance_t * );
+static int Process ( jack_nframes_t i_frames, void *p_arg );
+
+/*****************************************************************************
+ * Module descriptor
+ *****************************************************************************/
+vlc_module_begin();
+ set_shortname( "JACK" );
+ set_description( _("JACK audio output") );
+ set_capability( "audio output", 100 );
+ set_category( CAT_AUDIO );
+ set_subcategory( SUBCAT_AUDIO_AOUT );
+ set_callbacks( Open, Close );
+vlc_module_end();
+
+/*****************************************************************************
+ * Open: create a JACK client
+ *****************************************************************************/
+static int Open( vlc_object_t *p_this )
+{
+ aout_instance_t *p_aout = (aout_instance_t *)p_this;
+ unsigned int i, i_in_ports;
+ const char **pp_in_ports;
+ struct aout_sys_t * p_sys;
+
+ /* Allocate structure */
+ p_sys = malloc( sizeof( aout_sys_t ) );
+ if( p_sys == NULL )
+ {
+ msg_Err( p_aout, "out of memory" );
+ return VLC_ENOMEM;
+ }
+ p_aout->output.p_sys = p_sys;
+
+ /* Connect to the JACK server */
+ p_sys->p_jack_client = jack_client_new( "VLC Media Player" );
+ if( p_sys->p_jack_client == NULL )
+ {
+ msg_Err( p_aout, "Failed to connect to JACK server" );
+ free( p_sys );
+ return VLC_EGENERIC;
+ }
+
+ /* Set the process callback */
+ jack_set_process_callback( p_sys->p_jack_client, Process, p_aout );
+
+ p_aout->output.pf_play = Play;
+ aout_VolumeSoftInit( p_aout );
+
+ /* JACK only support fl32 format */
+ p_aout->output.output.i_format = VLC_FOURCC('f','l','3','2');
+ // TODO add buffer size callback
+ p_aout->output.i_nb_samples = jack_get_buffer_size( p_sys->p_jack_client );
+ p_aout->output.output.i_rate = jack_get_sample_rate( p_sys->p_jack_client );
+
+ p_sys->i_channels = aout_FormatNbChannels( &p_aout->output.output );
+
+ /* Create the output ports */
+ for( i = 0; i < p_sys->i_channels; i++ )
+ {
+ char p_name[32];
+ snprintf( p_name, 32, "channel %d", i );
+ p_sys->p_jack_port[i] = jack_port_register( p_sys->p_jack_client,
+ p_name, JACK_DEFAULT_AUDIO_TYPE, JackPortIsOutput, 0 );
+
+ if( p_sys->p_jack_port[i] == NULL )
+ {
+ msg_Err( p_aout, "Failed to register a JACK port" );
+ jack_client_close( p_sys->p_jack_client );
+ free( p_sys );
+ return VLC_EGENERIC;
+ }
+ }
+
+ /* Tell the JACK server we are ready */
+ if( jack_activate( p_sys->p_jack_client ) )
+ {
+ msg_Err( p_aout, "Failed to activate JACK client" );
+ jack_client_close( p_sys->p_jack_client );
+ free( p_sys );
+ return VLC_EGENERIC;
+ }
+
+
+ /* Find input ports to connect to */
+ pp_in_ports = jack_get_ports( p_sys->p_jack_client, NULL, NULL,
+ JackPortIsInput );
+ i_in_ports = 0;
+ while( pp_in_ports && pp_in_ports[i_in_ports] )
+ {
+ i_in_ports++;
+ }
+
+ /* Connect the output ports to input ports */
+ if( i_in_ports > 0 )
+ {
+ for( i = 0; i < p_sys->i_channels; i++ )
+ {
+ int i_in = i % i_in_ports;
+ if( jack_connect( p_sys->p_jack_client,
+ jack_port_name( p_sys->p_jack_port[i] ),
+ pp_in_ports[i_in]) )
+ {
+ msg_Err( p_aout, "Failed to connect port %s to port %s",
+ jack_port_name( p_sys->p_jack_port[i] ),
+ pp_in_ports[i_in] );
+
+ }
+ else
+ {
+ msg_Dbg( p_aout, "Connecting port %s to port %s",
+ jack_port_name( p_sys->p_jack_port[i] ),
+ pp_in_ports[i_in] );
+ }
+ }
+ }
+
+ msg_Dbg( p_aout, "JACK audio output initialized (%d channels, buffer "
+ "size=%d, rate=%d)", p_sys->i_channels,
+ p_aout->output.i_nb_samples, p_aout->output.output.i_rate );
+
+ return VLC_SUCCESS;
+}
+
+
+/*****************************************************************************
+ * Process: callback for JACK
+ *****************************************************************************/
+int Process( jack_nframes_t i_frames, void *p_arg )
+{
+ aout_buffer_t *p_buffer;
+ jack_default_audio_sample_t *p_jack_buffer;
+ unsigned int i, j;
+ aout_instance_t *p_aout = (aout_instance_t*) p_arg;
+
+ /* Get the next audio data buffer */
+ p_buffer = aout_FifoPop( p_aout, &p_aout->output.fifo );
+
+ if( p_buffer != NULL )
+ {
+ for( i = 0; i < p_aout->output.p_sys->i_channels; i++ )
+ {
+ /* Get an output buffer from JACK */
+ p_jack_buffer = jack_port_get_buffer(
+ p_aout->output.p_sys->p_jack_port[i], i_frames );
+
+ /* Fill the buffer with audio data */
+ for (j = 0; j < p_buffer->i_nb_samples; j++)
+ {
+ p_jack_buffer[j] = ((float*)p_buffer->p_buffer)[2*j+i];
+ }
+ if (p_buffer->i_nb_samples < i_frames)
+ {
+ msg_Warn( p_aout, "Buffer underrun (%d)",
+ i_frames-p_buffer->i_nb_samples );
+ memset( p_jack_buffer+j, 0, i_frames-p_buffer->i_nb_samples );
+ }
+ }
+ aout_BufferFree( p_buffer );
+ }
+ return 0;
+}
+
+
+/*****************************************************************************
+ * Play: nothing to do
+ *****************************************************************************/
+static void Play( aout_instance_t *p_aout )
+{
+ aout_FifoFirstDate( p_aout, &p_aout->output.fifo );
+}
+
+/*****************************************************************************
+ * Close: close the JACK client
+ *****************************************************************************/
+static void Close( vlc_object_t *p_this )
+{
+ aout_instance_t *p_aout = (aout_instance_t *)p_this;
+ struct aout_sys_t * p_sys = p_aout->output.p_sys;
+
+ jack_client_close( p_sys->p_jack_client );
+ free( p_sys );
+}
+
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