--- /dev/null
+/*****************************************************************************
+ * arts.c : aRts module
+ *****************************************************************************
+ * Copyright (C) 2001-2002 the VideoLAN team
+ * $Id$
+ *
+ * Authors: Emmanuel Blindauer <manu@agat.net>
+ * Samuel Hocevar <sam@zoy.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 <artsc.h>
+
+/*****************************************************************************
+ * aout_sys_t: arts audio output method descriptor
+ *****************************************************************************
+ * This structure is part of the audio output thread descriptor.
+ * It describes some arts specific variables.
+ *****************************************************************************/
+struct aout_sys_t
+{
+ arts_stream_t stream;
+
+ mtime_t latency;
+ int i_size;
+};
+
+/*****************************************************************************
+ * Local prototypes
+ *****************************************************************************/
+static int Open ( vlc_object_t * );
+static void Close ( vlc_object_t * );
+static void Play ( aout_instance_t * );
+
+/*****************************************************************************
+ * Module descriptor
+ *****************************************************************************/
+vlc_module_begin();
+ set_shortname( "aRts" );
+ set_description( _("aRts audio output") );
+ set_capability( "audio output", 50 );
+ set_category( CAT_AUDIO );
+ set_subcategory( SUBCAT_AUDIO_AOUT );
+ set_callbacks( Open, Close );
+vlc_module_end();
+
+/*****************************************************************************
+ * Open: open an aRts socket
+ *****************************************************************************/
+static int Open( vlc_object_t *p_this )
+{
+ aout_instance_t *p_aout = (aout_instance_t *)p_this;
+ struct aout_sys_t * p_sys;
+ int i_err;
+ int i_nb_channels;
+
+ /* 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;
+
+ i_err = arts_init();
+
+ if( i_err < 0 )
+ {
+ msg_Err( p_aout, "arts_init failed (%s)", arts_error_text(i_err) );
+ free( p_sys );
+ return VLC_EGENERIC;
+ }
+
+ p_aout->output.pf_play = Play;
+ aout_VolumeSoftInit( p_aout );
+
+ p_aout->output.output.i_format = AOUT_FMT_S16_NE;
+ i_nb_channels = aout_FormatNbChannels( &p_aout->output.output );
+ if ( i_nb_channels > 2 )
+ {
+ /* aRts doesn't support more than two channels. */
+ i_nb_channels = 2;
+ p_aout->output.output.i_physical_channels =
+ AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT;
+ }
+
+ /* Open a socket for playing a stream, set format to 16 bits */
+ p_sys->stream = arts_play_stream( p_aout->output.output.i_rate, 16,
+ i_nb_channels, "vlc" );
+ if( p_sys->stream == NULL )
+ {
+ msg_Err( p_aout, "cannot open aRts socket" );
+ free( p_sys );
+ return VLC_EGENERIC;
+ }
+
+ /* Try not to bufferize more than 200 ms */
+ arts_stream_set( p_sys->stream, ARTS_P_BUFFER_TIME, 50 );
+
+ /* Estimate latency with a half full buffer */
+ p_sys->latency = (mtime_t)1000
+ * (mtime_t)arts_stream_get( p_sys->stream, ARTS_P_SERVER_LATENCY );
+ p_sys->i_size = arts_stream_get( p_sys->stream, ARTS_P_PACKET_SIZE );
+
+ msg_Dbg( p_aout, "aRts initialized, latency %i000, %i packets of size %i",
+ arts_stream_get( p_sys->stream, ARTS_P_SERVER_LATENCY ),
+ arts_stream_get( p_sys->stream, ARTS_P_PACKET_COUNT ),
+ arts_stream_get( p_sys->stream, ARTS_P_PACKET_SIZE ) );
+
+ p_aout->output.i_nb_samples = p_sys->i_size / sizeof(uint16_t)
+ / i_nb_channels;
+
+ return VLC_SUCCESS;
+}
+
+/*****************************************************************************
+ * Play: nothing to do
+ *****************************************************************************/
+static void Play( aout_instance_t *p_aout )
+{
+ struct aout_sys_t * p_sys = p_aout->output.p_sys;
+ aout_buffer_t * p_buffer;
+ int i_tmp;
+
+#if 0
+ while( arts_stream_get( p_sys->stream, ARTS_P_BUFFER_SPACE ) < 16384*3/2 )
+ {
+ msleep( 10000 );
+ }
+#endif
+
+ p_buffer = aout_FifoPop( p_aout, &p_aout->output.fifo );
+
+ if( p_buffer != NULL )
+ {
+ i_tmp = arts_write( p_sys->stream, p_buffer->p_buffer,
+ p_buffer->i_nb_bytes );
+
+ if( i_tmp < 0 )
+ {
+ msg_Err( p_aout, "write failed (%s)", arts_error_text(i_tmp) );
+ }
+
+ aout_BufferFree( p_buffer );
+ }
+}
+
+/*****************************************************************************
+ * Close: close the aRts socket
+ *****************************************************************************/
+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;
+
+ arts_close_stream( p_sys->stream );
+ arts_free();
+ free( p_sys );
+}
+
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