1 /*****************************************************************************
3 *****************************************************************************
4 * Copyright (C) 2001-2002 the VideoLAN team
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., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
23 *****************************************************************************/
25 /*****************************************************************************
27 *****************************************************************************/
28 #include <unistd.h> /* write(), close() */
35 #include <vlc_plugin.h>
40 /*****************************************************************************
41 * aout_sys_t: arts audio output method descriptor
42 *****************************************************************************
43 * This structure is part of the audio output thread descriptor.
44 * It describes some arts specific variables.
45 *****************************************************************************/
54 /*****************************************************************************
56 *****************************************************************************/
57 static int Open ( vlc_object_t * );
58 static void Close ( vlc_object_t * );
59 static void Play ( aout_instance_t * );
61 /*****************************************************************************
63 *****************************************************************************/
65 set_shortname( "aRts" );
66 set_description( N_("aRts audio output") );
67 set_capability( "audio output", 50 );
68 set_category( CAT_AUDIO );
69 set_subcategory( SUBCAT_AUDIO_AOUT );
70 set_callbacks( Open, Close );
73 /*****************************************************************************
74 * Open: open an aRts socket
75 *****************************************************************************/
76 static int Open( vlc_object_t *p_this )
78 aout_instance_t *p_aout = (aout_instance_t *)p_this;
79 struct aout_sys_t * p_sys;
83 /* Allocate structure */
84 p_sys = malloc( sizeof( aout_sys_t ) );
87 msg_Err( p_aout, "out of memory" );
90 p_aout->output.p_sys = p_sys;
96 msg_Err( p_aout, "arts_init failed (%s)", arts_error_text(i_err) );
101 p_aout->output.pf_play = Play;
102 aout_VolumeSoftInit( p_aout );
104 p_aout->output.output.i_format = AOUT_FMT_S16_NE;
105 i_nb_channels = aout_FormatNbChannels( &p_aout->output.output );
106 if ( i_nb_channels > 2 )
108 /* aRts doesn't support more than two channels. */
110 p_aout->output.output.i_physical_channels =
111 AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT;
114 /* Open a socket for playing a stream, set format to 16 bits */
115 p_sys->stream = arts_play_stream( p_aout->output.output.i_rate, 16,
116 i_nb_channels, "vlc" );
117 if( p_sys->stream == NULL )
119 msg_Err( p_aout, "cannot open aRts socket" );
124 /* Try not to bufferize more than 200 ms */
125 arts_stream_set( p_sys->stream, ARTS_P_BUFFER_TIME, 50 );
127 /* Estimate latency with a half full buffer */
128 p_sys->latency = (mtime_t)1000
129 * (mtime_t)arts_stream_get( p_sys->stream, ARTS_P_SERVER_LATENCY );
130 p_sys->i_size = arts_stream_get( p_sys->stream, ARTS_P_PACKET_SIZE );
132 msg_Dbg( p_aout, "aRts initialized, latency %i000, %i packets of size %i",
133 arts_stream_get( p_sys->stream, ARTS_P_SERVER_LATENCY ),
134 arts_stream_get( p_sys->stream, ARTS_P_PACKET_COUNT ),
135 arts_stream_get( p_sys->stream, ARTS_P_PACKET_SIZE ) );
137 p_aout->output.i_nb_samples = p_sys->i_size / sizeof(uint16_t)
143 /*****************************************************************************
144 * Play: nothing to do
145 *****************************************************************************/
146 static void Play( aout_instance_t *p_aout )
148 struct aout_sys_t * p_sys = p_aout->output.p_sys;
149 aout_buffer_t * p_buffer;
153 while( arts_stream_get( p_sys->stream, ARTS_P_BUFFER_SPACE ) < 16384*3/2 )
159 p_buffer = aout_FifoPop( p_aout, &p_aout->output.fifo );
161 if( p_buffer != NULL )
163 i_tmp = arts_write( p_sys->stream, p_buffer->p_buffer,
164 p_buffer->i_nb_bytes );
168 msg_Err( p_aout, "write failed (%s)", arts_error_text(i_tmp) );
171 aout_BufferFree( p_buffer );
175 /*****************************************************************************
176 * Close: close the aRts socket
177 *****************************************************************************/
178 static void Close( vlc_object_t *p_this )
180 aout_instance_t *p_aout = (aout_instance_t *)p_this;
181 struct aout_sys_t * p_sys = p_aout->output.p_sys;
183 arts_close_stream( p_sys->stream );