1 /*****************************************************************************
3 *****************************************************************************
4 * Copyright (C) 2001-2002 VideoLAN (Centrale Réseaux) and its contributors
7 * Authors: Emmanuel Blindauer <manu@agat.net>
8 * Samuel Hocevar <sam@zoy.org>
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License as published by
12 * the Free Software Foundation; either version 2 of the License, or
13 * (at your option) any later version.
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 * GNU General Public License for more details.
20 * You should have received a copy of the GNU General Public License
21 * along with this program; if not, write to the Free Software
22 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111, USA.
23 *****************************************************************************/
25 /*****************************************************************************
27 *****************************************************************************/
28 #include <errno.h> /* ENOMEM */
29 #include <fcntl.h> /* open(), O_WRONLY */
30 #include <string.h> /* strerror() */
31 #include <unistd.h> /* write(), close() */
32 #include <stdlib.h> /* calloc(), malloc(), free() */
37 #include "aout_internal.h"
41 /*****************************************************************************
42 * aout_sys_t: arts audio output method descriptor
43 *****************************************************************************
44 * This structure is part of the audio output thread descriptor.
45 * It describes some arts specific variables.
46 *****************************************************************************/
55 /*****************************************************************************
57 *****************************************************************************/
58 static int Open ( vlc_object_t * );
59 static void Close ( vlc_object_t * );
60 static void Play ( aout_instance_t * );
62 /*****************************************************************************
64 *****************************************************************************/
66 set_shortname( "aRts" );
67 set_description( _("aRts audio output") );
68 set_capability( "audio output", 50 );
69 set_category( CAT_AUDIO );
70 set_subcategory( SUBCAT_AUDIO_AOUT );
71 set_callbacks( Open, Close );
74 /*****************************************************************************
75 * Open: open an aRts socket
76 *****************************************************************************/
77 static int Open( vlc_object_t *p_this )
79 aout_instance_t *p_aout = (aout_instance_t *)p_this;
80 struct aout_sys_t * p_sys;
84 /* Allocate structure */
85 p_sys = malloc( sizeof( aout_sys_t ) );
88 msg_Err( p_aout, "out of memory" );
91 p_aout->output.p_sys = p_sys;
97 msg_Err( p_aout, "arts_init failed (%s)", arts_error_text(i_err) );
102 p_aout->output.pf_play = Play;
103 aout_VolumeSoftInit( p_aout );
105 p_aout->output.output.i_format = AOUT_FMT_S16_NE;
106 i_nb_channels = aout_FormatNbChannels( &p_aout->output.output );
107 if ( i_nb_channels > 2 )
109 /* aRts doesn't support more than two channels. */
111 p_aout->output.output.i_physical_channels =
112 AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT;
115 /* Open a socket for playing a stream, set format to 16 bits */
116 p_sys->stream = arts_play_stream( p_aout->output.output.i_rate, 16,
117 i_nb_channels, "vlc" );
118 if( p_sys->stream == NULL )
120 msg_Err( p_aout, "cannot open aRts socket" );
125 /* Try not to bufferize more than 200 ms */
126 arts_stream_set( p_sys->stream, ARTS_P_BUFFER_TIME, 50 );
128 /* Estimate latency with a half full buffer */
129 p_sys->latency = (mtime_t)1000
130 * (mtime_t)arts_stream_get( p_sys->stream, ARTS_P_SERVER_LATENCY );
131 p_sys->i_size = arts_stream_get( p_sys->stream, ARTS_P_PACKET_SIZE );
133 msg_Dbg( p_aout, "aRts initialized, latency %i000, %i packets of size %i",
134 arts_stream_get( p_sys->stream, ARTS_P_SERVER_LATENCY ),
135 arts_stream_get( p_sys->stream, ARTS_P_PACKET_COUNT ),
136 arts_stream_get( p_sys->stream, ARTS_P_PACKET_SIZE ) );
138 p_aout->output.i_nb_samples = p_sys->i_size / sizeof(uint16_t)
144 /*****************************************************************************
145 * Play: nothing to do
146 *****************************************************************************/
147 static void Play( aout_instance_t *p_aout )
149 struct aout_sys_t * p_sys = p_aout->output.p_sys;
150 aout_buffer_t * p_buffer;
154 while( arts_stream_get( p_sys->stream, ARTS_P_BUFFER_SPACE ) < 16384*3/2 )
160 p_buffer = aout_FifoPop( p_aout, &p_aout->output.fifo );
162 if( p_buffer != NULL )
164 i_tmp = arts_write( p_sys->stream, p_buffer->p_buffer,
165 p_buffer->i_nb_bytes );
169 msg_Err( p_aout, "write failed (%s)", arts_error_text(i_tmp) );
172 aout_BufferFree( p_buffer );
176 /*****************************************************************************
177 * Close: close the aRts socket
178 *****************************************************************************/
179 static void Close( vlc_object_t *p_this )
181 aout_instance_t *p_aout = (aout_instance_t *)p_this;
182 struct aout_sys_t * p_sys = p_aout->output.p_sys;
184 arts_close_stream( p_sys->stream );