mirror of
https://code.videolan.org/videolan/vlc
synced 2024-09-04 09:11:33 +02:00
1025 lines
36 KiB
C
1025 lines
36 KiB
C
/*****************************************************************************
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* alsa.c : alsa plugin for vlc
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*****************************************************************************
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* Copyright (C) 2000-2001 the VideoLAN team
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* $Id$
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*
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* Authors: Henri Fallon <henri@videolan.org> - Original Author
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* Jeffrey Baker <jwbaker@acm.org> - Port to ALSA 1.0 API
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* John Paul Lorenti <jpl31@columbia.edu> - Device selection
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* Arnaud de Bossoreille de Ribou <bozo@via.ecp.fr> - S/PDIF and aout3
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
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*****************************************************************************/
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/*****************************************************************************
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* Preamble
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*****************************************************************************/
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#include <vlc/vlc.h>
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#include <errno.h> /* ENOMEM */
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#include <vlc_interface.h>
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#include <vlc_aout.h>
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/* ALSA part
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Note: we use the new API which is available since 0.9.0beta10a. */
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#define ALSA_PCM_NEW_HW_PARAMS_API
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#define ALSA_PCM_NEW_SW_PARAMS_API
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#include <alsa/asoundlib.h>
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/*****************************************************************************
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* aout_sys_t: ALSA audio output method descriptor
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*****************************************************************************
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* This structure is part of the audio output thread descriptor.
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* It describes the ALSA specific properties of an audio device.
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*****************************************************************************/
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struct aout_sys_t
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{
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snd_pcm_t * p_snd_pcm;
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unsigned int i_period_time;
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#ifdef ALSA_DEBUG
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snd_output_t * p_snd_stderr;
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#endif
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int b_playing; /* playing status */
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mtime_t start_date;
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vlc_mutex_t lock;
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vlc_cond_t wait ;
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snd_pcm_status_t *p_status;
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};
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#define A52_FRAME_NB 1536
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/* These values are in frames.
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To convert them to a number of bytes you have to multiply them by the
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number of channel(s) (eg. 2 for stereo) and the size of a sample (eg.
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2 for int16_t). */
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#define ALSA_DEFAULT_PERIOD_SIZE 1024
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#define ALSA_DEFAULT_BUFFER_SIZE ( ALSA_DEFAULT_PERIOD_SIZE << 8 )
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#define ALSA_SPDIF_PERIOD_SIZE A52_FRAME_NB
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#define ALSA_SPDIF_BUFFER_SIZE ( ALSA_SPDIF_PERIOD_SIZE << 4 )
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/* Why << 4 ? --Meuuh */
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/* Why not ? --Bozo */
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/* Right. --Meuuh */
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#define DEFAULT_ALSA_DEVICE N_("default")
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/*****************************************************************************
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* Local prototypes
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*****************************************************************************/
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static int Open ( vlc_object_t * );
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static void Close ( vlc_object_t * );
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static void Play ( aout_instance_t * );
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static int ALSAThread ( aout_instance_t * );
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static void ALSAFill ( aout_instance_t * );
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static int FindDevicesCallback( vlc_object_t *p_this, char const *psz_name,
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vlc_value_t newval, vlc_value_t oldval, void *p_unused );
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/*****************************************************************************
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* Module descriptor
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*****************************************************************************/
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static const char *ppsz_devices[] = { "default" };
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static const char *ppsz_devices_text[] = { N_("Default") };
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vlc_module_begin();
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set_shortname( "ALSA" );
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set_description( _("ALSA audio output") );
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set_category( CAT_AUDIO );
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set_subcategory( SUBCAT_AUDIO_AOUT );
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add_string( "alsadev", DEFAULT_ALSA_DEVICE, aout_FindAndRestart,
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N_("ALSA Device Name"), NULL, VLC_FALSE );
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change_string_list( ppsz_devices, ppsz_devices_text, FindDevicesCallback );
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change_action_add( FindDevicesCallback, N_("Refresh list") );
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set_capability( "audio output", 150 );
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set_callbacks( Open, Close );
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vlc_module_end();
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/*****************************************************************************
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* Probe: probe the audio device for available formats and channels
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*****************************************************************************/
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static void Probe( aout_instance_t * p_aout,
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const char * psz_device, const char * psz_iec_device,
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int *pi_snd_pcm_format )
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{
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struct aout_sys_t * p_sys = p_aout->output.p_sys;
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vlc_value_t val, text;
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int i_ret;
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var_Create ( p_aout, "audio-device", VLC_VAR_INTEGER | VLC_VAR_HASCHOICE );
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text.psz_string = _("Audio Device");
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var_Change( p_aout, "audio-device", VLC_VAR_SETTEXT, &text, NULL );
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/* We'll open the audio device in non blocking mode so we can just exit
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* when it is already in use, but for the real stuff we'll still use
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* the blocking mode */
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/* Now test linear PCM capabilities */
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if ( !(i_ret = snd_pcm_open( &p_sys->p_snd_pcm, psz_device,
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SND_PCM_STREAM_PLAYBACK,
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SND_PCM_NONBLOCK ) ) )
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{
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int i_channels;
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snd_pcm_hw_params_t * p_hw;
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snd_pcm_hw_params_alloca (&p_hw);
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if ( snd_pcm_hw_params_any( p_sys->p_snd_pcm, p_hw ) < 0 )
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{
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msg_Warn( p_aout, "unable to retrieve initial hardware parameters"
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", disabling linear PCM audio" );
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snd_pcm_close( p_sys->p_snd_pcm );
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var_Destroy( p_aout, "audio-device" );
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return;
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}
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if ( snd_pcm_hw_params_set_format( p_sys->p_snd_pcm, p_hw,
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*pi_snd_pcm_format ) < 0 )
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{
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int i_snd_rc = -1;
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if( *pi_snd_pcm_format != SND_PCM_FORMAT_S16 )
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{
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*pi_snd_pcm_format = SND_PCM_FORMAT_S16;
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i_snd_rc = snd_pcm_hw_params_set_format( p_sys->p_snd_pcm,
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p_hw, *pi_snd_pcm_format );
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}
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if ( i_snd_rc < 0 )
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{
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msg_Warn( p_aout, "unable to set stream sample size and "
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"word order, disabling linear PCM audio" );
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snd_pcm_close( p_sys->p_snd_pcm );
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var_Destroy( p_aout, "audio-device" );
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return;
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}
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}
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i_channels = aout_FormatNbChannels( &p_aout->output.output );
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while ( i_channels > 0 )
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{
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if ( !snd_pcm_hw_params_test_channels( p_sys->p_snd_pcm, p_hw,
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i_channels ) )
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{
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switch ( i_channels )
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{
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case 1:
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val.i_int = AOUT_VAR_MONO;
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text.psz_string = N_("Mono");
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var_Change( p_aout, "audio-device",
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VLC_VAR_ADDCHOICE, &val, &text );
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break;
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case 2:
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val.i_int = AOUT_VAR_STEREO;
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text.psz_string = N_("Stereo");
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var_Change( p_aout, "audio-device",
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VLC_VAR_ADDCHOICE, &val, &text );
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var_Set( p_aout, "audio-device", val );
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break;
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case 4:
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val.i_int = AOUT_VAR_2F2R;
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text.psz_string = N_("2 Front 2 Rear");
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var_Change( p_aout, "audio-device",
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VLC_VAR_ADDCHOICE, &val, &text );
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break;
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case 6:
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val.i_int = AOUT_VAR_5_1;
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text.psz_string = "5.1";
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var_Change( p_aout, "audio-device",
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VLC_VAR_ADDCHOICE, &val, &text );
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break;
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}
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}
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--i_channels;
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}
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/* Special case for mono on stereo only boards */
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i_channels = aout_FormatNbChannels( &p_aout->output.output );
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var_Change( p_aout, "audio-device", VLC_VAR_CHOICESCOUNT, &val, NULL );
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if( val.i_int <= 0 && i_channels == 1 )
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{
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if ( !snd_pcm_hw_params_test_channels( p_sys->p_snd_pcm, p_hw, 2 ))
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{
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val.i_int = AOUT_VAR_STEREO;
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text.psz_string = N_("Stereo");
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var_Change( p_aout, "audio-device",
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VLC_VAR_ADDCHOICE, &val, &text );
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var_Set( p_aout, "audio-device", val );
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}
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}
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/* Close the previously opened device */
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snd_pcm_close( p_sys->p_snd_pcm );
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}
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else if ( i_ret == -EBUSY )
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{
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msg_Warn( p_aout, "audio device: %s is already in use", psz_device );
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}
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/* Test for S/PDIF device if needed */
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if ( psz_iec_device )
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{
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/* Opening the device should be enough */
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if ( !(i_ret = snd_pcm_open( &p_sys->p_snd_pcm, psz_iec_device,
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SND_PCM_STREAM_PLAYBACK,
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SND_PCM_NONBLOCK ) ) )
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{
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val.i_int = AOUT_VAR_SPDIF;
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text.psz_string = N_("A/52 over S/PDIF");
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var_Change( p_aout, "audio-device",
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VLC_VAR_ADDCHOICE, &val, &text );
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if( config_GetInt( p_aout, "spdif" ) )
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var_Set( p_aout, "audio-device", val );
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snd_pcm_close( p_sys->p_snd_pcm );
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}
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else if ( i_ret == -EBUSY )
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{
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msg_Warn( p_aout, "audio device: %s is already in use",
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psz_iec_device );
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}
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}
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var_Change( p_aout, "audio-device", VLC_VAR_CHOICESCOUNT, &val, NULL );
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if( val.i_int <= 0 )
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{
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/* Probe() has failed. */
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msg_Dbg( p_aout, "failed to find a useable alsa configuration" );
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var_Destroy( p_aout, "audio-device" );
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return;
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}
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/* Add final settings to the variable */
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var_AddCallback( p_aout, "audio-device", aout_ChannelsRestart, NULL );
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val.b_bool = VLC_TRUE;
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var_Set( p_aout, "intf-change", val );
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}
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/*****************************************************************************
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* Open: create a handle and open an alsa device
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*****************************************************************************
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* This function opens an alsa device, through the alsa API.
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*
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* Note: the only heap-allocated string is psz_device. All the other pointers
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* are references to psz_device or to stack-allocated data.
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*****************************************************************************/
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static int Open( vlc_object_t *p_this )
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{
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aout_instance_t * p_aout = (aout_instance_t *)p_this;
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struct aout_sys_t * p_sys;
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vlc_value_t val;
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char psz_default_iec_device[128]; /* Buffer used to store the default
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S/PDIF device */
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char * psz_device, * psz_iec_device; /* device names for PCM and S/PDIF
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output */
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int i_vlc_pcm_format; /* Audio format for VLC's data */
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int i_snd_pcm_format; /* Audio format for ALSA's data */
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snd_pcm_uframes_t i_buffer_size = 0;
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snd_pcm_uframes_t i_period_size = 0;
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int i_channels = 0;
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snd_pcm_hw_params_t *p_hw;
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snd_pcm_sw_params_t *p_sw;
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int i_snd_rc = -1;
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unsigned int i_old_rate;
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vlc_bool_t b_retry = VLC_TRUE;
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/* Allocate structures */
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p_aout->output.p_sys = p_sys = malloc( sizeof( aout_sys_t ) );
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if( p_sys == NULL )
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{
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msg_Err( p_aout, "out of memory" );
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return VLC_ENOMEM;
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}
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p_sys->b_playing = VLC_FALSE;
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p_sys->start_date = 0;
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vlc_cond_init( p_aout, &p_sys->wait );
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vlc_mutex_init( p_aout, &p_sys->lock );
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/* Get device name */
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if( (psz_device = config_GetPsz( p_aout, "alsadev" )) == NULL )
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{
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msg_Err( p_aout, "no audio device given (maybe \"default\" ?)" );
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intf_UserFatal( p_aout, VLC_FALSE, _("No Audio Device"),
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_("No audio device name was given. You might want to " \
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"enter \"default\".") );
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free( p_sys );
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return VLC_EGENERIC;
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}
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/* Choose the IEC device for S/PDIF output:
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if the device is overriden by the user then it will be the one
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otherwise we compute the default device based on the output format. */
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if( AOUT_FMT_NON_LINEAR( &p_aout->output.output )
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&& !strcmp( psz_device, DEFAULT_ALSA_DEVICE ) )
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{
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snprintf( psz_default_iec_device, sizeof(psz_default_iec_device),
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"iec958:AES0=0x%x,AES1=0x%x,AES2=0x%x,AES3=0x%x",
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IEC958_AES0_CON_EMPHASIS_NONE | IEC958_AES0_NONAUDIO,
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IEC958_AES1_CON_ORIGINAL | IEC958_AES1_CON_PCM_CODER,
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0,
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( p_aout->output.output.i_rate == 48000 ?
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IEC958_AES3_CON_FS_48000 :
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( p_aout->output.output.i_rate == 44100 ?
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IEC958_AES3_CON_FS_44100 : IEC958_AES3_CON_FS_32000 ) ) );
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psz_iec_device = psz_default_iec_device;
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}
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else if( AOUT_FMT_NON_LINEAR( &p_aout->output.output ) )
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{
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psz_iec_device = psz_device;
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}
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else
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{
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psz_iec_device = NULL;
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}
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/* Choose the linear PCM format (read the comment above about FPU
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and float32) */
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if( vlc_CPU() & CPU_CAPABILITY_FPU )
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{
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i_vlc_pcm_format = VLC_FOURCC('f','l','3','2');
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i_snd_pcm_format = SND_PCM_FORMAT_FLOAT;
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}
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else
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{
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i_vlc_pcm_format = AOUT_FMT_S16_NE;
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i_snd_pcm_format = SND_PCM_FORMAT_S16;
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}
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/* If the variable doesn't exist then it's the first time we're called
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and we have to probe the available audio formats and channels */
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if ( var_Type( p_aout, "audio-device" ) == 0 )
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{
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Probe( p_aout, psz_device, psz_iec_device, &i_snd_pcm_format );
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}
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if ( var_Get( p_aout, "audio-device", &val ) < 0 )
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{
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free( p_sys );
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free( psz_device );
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return VLC_EGENERIC;
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}
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p_aout->output.output.i_format = i_vlc_pcm_format;
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if ( val.i_int == AOUT_VAR_5_1 )
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{
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p_aout->output.output.i_physical_channels
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= AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT | AOUT_CHAN_CENTER
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| AOUT_CHAN_REARLEFT | AOUT_CHAN_REARRIGHT
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| AOUT_CHAN_LFE;
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free( psz_device );
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psz_device = strdup( "surround51" );
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}
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else if ( val.i_int == AOUT_VAR_2F2R )
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{
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p_aout->output.output.i_physical_channels
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= AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT
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| AOUT_CHAN_REARLEFT | AOUT_CHAN_REARRIGHT;
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free( psz_device );
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psz_device = strdup( "surround40" );
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}
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else if ( val.i_int == AOUT_VAR_STEREO )
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{
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p_aout->output.output.i_physical_channels
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= AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT;
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}
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else if ( val.i_int == AOUT_VAR_MONO )
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{
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p_aout->output.output.i_physical_channels = AOUT_CHAN_CENTER;
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}
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else if( val.i_int != AOUT_VAR_SPDIF )
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{
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/* This should not happen ! */
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msg_Err( p_aout, "internal: can't find audio-device (%i)", val.i_int );
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free( p_sys );
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free( psz_device );
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return VLC_EGENERIC;
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}
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#ifdef ALSA_DEBUG
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snd_output_stdio_attach( &p_sys->p_snd_stderr, stderr, 0 );
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#endif
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|
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/* Open the device */
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if ( val.i_int == AOUT_VAR_SPDIF )
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{
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if ( ( i_snd_rc = snd_pcm_open( &p_sys->p_snd_pcm, psz_iec_device,
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SND_PCM_STREAM_PLAYBACK, 0 ) ) < 0 )
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{
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msg_Err( p_aout, "cannot open ALSA device `%s' (%s)",
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psz_iec_device, snd_strerror( i_snd_rc ) );
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intf_UserFatal( p_aout, VLC_FALSE, _("Audio output failed"),
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_("VLC could not open the ALSA device \"%s\" (%s)."),
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psz_iec_device, snd_strerror( i_snd_rc ) );
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free( p_sys );
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free( psz_device );
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return VLC_EGENERIC;
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}
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i_buffer_size = ALSA_SPDIF_BUFFER_SIZE;
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i_snd_pcm_format = SND_PCM_FORMAT_S16;
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i_channels = 2;
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i_vlc_pcm_format = VLC_FOURCC('s','p','d','i');
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p_aout->output.i_nb_samples = i_period_size = ALSA_SPDIF_PERIOD_SIZE;
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p_aout->output.output.i_bytes_per_frame = AOUT_SPDIF_SIZE;
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p_aout->output.output.i_frame_length = A52_FRAME_NB;
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aout_VolumeNoneInit( p_aout );
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}
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else
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{
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int i;
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|
|
msg_Dbg( p_aout, "opening ALSA device `%s'", psz_device );
|
|
|
|
/* Since it seems snd_pcm_close hasen't really released the device at
|
|
the time it returns, probe if the device is available in loop for 1s.
|
|
We cannot use blocking mode since the we would wait indefinitely when
|
|
switching from a dmx device to surround51. */
|
|
|
|
for( i = 10; i >= 0; i-- )
|
|
{
|
|
if ( ( i_snd_rc = snd_pcm_open( &p_sys->p_snd_pcm, psz_device,
|
|
SND_PCM_STREAM_PLAYBACK, SND_PCM_NONBLOCK ) ) == -EBUSY )
|
|
{
|
|
if( i ) msleep( 100000 /* 100ms */ );
|
|
else
|
|
{
|
|
msg_Err( p_aout, "audio device: %s is already in use",
|
|
psz_device );
|
|
intf_UserFatal( p_aout, VLC_FALSE, _("Audio output failed"),
|
|
_("The audio device \"%s\" is already in use."),
|
|
psz_device );
|
|
}
|
|
continue;
|
|
}
|
|
break;
|
|
}
|
|
if( i_snd_rc < 0 )
|
|
{
|
|
msg_Err( p_aout, "cannot open ALSA device `%s' (%s)",
|
|
psz_device, snd_strerror( i_snd_rc ) );
|
|
intf_UserFatal( p_aout, VLC_FALSE, _("Audio output failed"),
|
|
_("VLC could not open the ALSA device \"%s\" (%s)."),
|
|
psz_device, snd_strerror( i_snd_rc ) );
|
|
free( p_sys );
|
|
free( psz_device );
|
|
return VLC_EGENERIC;
|
|
}
|
|
|
|
/* We want blocking mode */
|
|
snd_pcm_nonblock( p_sys->p_snd_pcm, 0 );
|
|
|
|
i_buffer_size = ALSA_DEFAULT_BUFFER_SIZE;
|
|
i_channels = aout_FormatNbChannels( &p_aout->output.output );
|
|
|
|
p_aout->output.i_nb_samples = i_period_size = ALSA_DEFAULT_PERIOD_SIZE;
|
|
|
|
aout_VolumeSoftInit( p_aout );
|
|
}
|
|
|
|
/* Free psz_device so that all the remaining data is stack-allocated */
|
|
free( psz_device );
|
|
|
|
p_aout->output.pf_play = Play;
|
|
|
|
snd_pcm_hw_params_alloca(&p_hw);
|
|
snd_pcm_sw_params_alloca(&p_sw);
|
|
|
|
/* Due to some bugs in alsa with some drivers, we need to retry in s16l
|
|
if snd_pcm_hw_params fails in fl32 */
|
|
while ( b_retry )
|
|
{
|
|
b_retry = VLC_FALSE;
|
|
|
|
/* Get Initial hardware parameters */
|
|
if ( ( i_snd_rc = snd_pcm_hw_params_any( p_sys->p_snd_pcm, p_hw ) ) < 0 )
|
|
{
|
|
msg_Err( p_aout, "unable to retrieve initial hardware parameters (%s)",
|
|
snd_strerror( i_snd_rc ) );
|
|
goto error;
|
|
}
|
|
|
|
/* Set format. */
|
|
if ( ( i_snd_rc = snd_pcm_hw_params_set_format( p_sys->p_snd_pcm, p_hw,
|
|
i_snd_pcm_format ) ) < 0 )
|
|
{
|
|
if( i_snd_pcm_format != SND_PCM_FORMAT_S16 )
|
|
{
|
|
i_snd_pcm_format = SND_PCM_FORMAT_S16;
|
|
i_snd_rc = snd_pcm_hw_params_set_format( p_sys->p_snd_pcm,
|
|
p_hw, i_snd_pcm_format );
|
|
}
|
|
if ( i_snd_rc < 0 )
|
|
{
|
|
msg_Err( p_aout, "unable to set stream sample size and "
|
|
"word order (%s)", snd_strerror( i_snd_rc ) );
|
|
goto error;
|
|
}
|
|
}
|
|
if( i_vlc_pcm_format != VLC_FOURCC('s','p','d','i') )
|
|
switch( i_snd_pcm_format )
|
|
{
|
|
case SND_PCM_FORMAT_FLOAT:
|
|
i_vlc_pcm_format = VLC_FOURCC('f','l','3','2');
|
|
break;
|
|
case SND_PCM_FORMAT_S16:
|
|
i_vlc_pcm_format = AOUT_FMT_S16_NE;
|
|
break;
|
|
}
|
|
p_aout->output.output.i_format = i_vlc_pcm_format;
|
|
|
|
if ( ( i_snd_rc = snd_pcm_hw_params_set_access( p_sys->p_snd_pcm, p_hw,
|
|
SND_PCM_ACCESS_RW_INTERLEAVED ) ) < 0 )
|
|
{
|
|
msg_Err( p_aout, "unable to set interleaved stream format (%s)",
|
|
snd_strerror( i_snd_rc ) );
|
|
goto error;
|
|
}
|
|
|
|
/* Set channels. */
|
|
if ( ( i_snd_rc = snd_pcm_hw_params_set_channels( p_sys->p_snd_pcm, p_hw,
|
|
i_channels ) ) < 0 )
|
|
{
|
|
msg_Err( p_aout, "unable to set number of output channels (%s)",
|
|
snd_strerror( i_snd_rc ) );
|
|
goto error;
|
|
}
|
|
|
|
/* Set rate. */
|
|
i_old_rate = p_aout->output.output.i_rate;
|
|
#ifdef HAVE_ALSA_NEW_API
|
|
i_snd_rc = snd_pcm_hw_params_set_rate_near( p_sys->p_snd_pcm, p_hw,
|
|
&p_aout->output.output.i_rate,
|
|
NULL );
|
|
#else
|
|
i_snd_rc = snd_pcm_hw_params_set_rate_near( p_sys->p_snd_pcm, p_hw,
|
|
p_aout->output.output.i_rate,
|
|
NULL );
|
|
#endif
|
|
if( i_snd_rc < 0 || p_aout->output.output.i_rate != i_old_rate )
|
|
{
|
|
msg_Warn( p_aout, "The rate %d Hz is not supported by your " \
|
|
"hardware. Using %d Hz instead.\n", i_old_rate, \
|
|
p_aout->output.output.i_rate );
|
|
}
|
|
|
|
/* Set buffer size. */
|
|
#ifdef HAVE_ALSA_NEW_API
|
|
if ( ( i_snd_rc = snd_pcm_hw_params_set_buffer_size_near( p_sys->p_snd_pcm,
|
|
p_hw, &i_buffer_size ) ) < 0 )
|
|
#else
|
|
if ( ( i_snd_rc = snd_pcm_hw_params_set_buffer_size_near( p_sys->p_snd_pcm,
|
|
p_hw, i_buffer_size ) ) < 0 )
|
|
#endif
|
|
{
|
|
msg_Err( p_aout, "unable to set buffer size (%s)",
|
|
snd_strerror( i_snd_rc ) );
|
|
goto error;
|
|
}
|
|
|
|
/* Set period size. */
|
|
#ifdef HAVE_ALSA_NEW_API
|
|
if ( ( i_snd_rc = snd_pcm_hw_params_set_period_size_near( p_sys->p_snd_pcm,
|
|
p_hw, &i_period_size, NULL ) ) < 0 )
|
|
#else
|
|
if ( ( i_snd_rc = snd_pcm_hw_params_set_period_size_near( p_sys->p_snd_pcm,
|
|
p_hw, i_period_size, NULL ) ) < 0 )
|
|
#endif
|
|
{
|
|
msg_Err( p_aout, "unable to set period size (%s)",
|
|
snd_strerror( i_snd_rc ) );
|
|
goto error;
|
|
}
|
|
p_aout->output.i_nb_samples = i_period_size;
|
|
|
|
/* Commit hardware parameters. */
|
|
if ( ( i_snd_rc = snd_pcm_hw_params( p_sys->p_snd_pcm, p_hw ) ) < 0 )
|
|
{
|
|
if ( b_retry == VLC_FALSE &&
|
|
i_snd_pcm_format == SND_PCM_FORMAT_FLOAT)
|
|
{
|
|
b_retry = VLC_TRUE;
|
|
i_snd_pcm_format = SND_PCM_FORMAT_S16;
|
|
p_aout->output.output.i_format = AOUT_FMT_S16_NE;
|
|
msg_Warn( p_aout, "unable to commit hardware configuration "
|
|
"with fl32 samples. Retrying with s16l (%s)", snd_strerror( i_snd_rc ) );
|
|
}
|
|
else
|
|
{
|
|
msg_Err( p_aout, "unable to commit hardware configuration (%s)",
|
|
snd_strerror( i_snd_rc ) );
|
|
goto error;
|
|
}
|
|
}
|
|
}
|
|
|
|
#ifdef HAVE_ALSA_NEW_API
|
|
if( ( i_snd_rc = snd_pcm_hw_params_get_period_time( p_hw,
|
|
&p_sys->i_period_time, NULL ) ) < 0 )
|
|
#else
|
|
if( ( p_sys->i_period_time =
|
|
(int)snd_pcm_hw_params_get_period_time( p_hw, NULL ) ) < 0 )
|
|
#endif
|
|
{
|
|
msg_Err( p_aout, "unable to get period time (%s)",
|
|
snd_strerror( i_snd_rc ) );
|
|
goto error;
|
|
}
|
|
|
|
/* Get Initial software parameters */
|
|
snd_pcm_sw_params_current( p_sys->p_snd_pcm, p_sw );
|
|
|
|
i_snd_rc = snd_pcm_sw_params_set_sleep_min( p_sys->p_snd_pcm, p_sw, 0 );
|
|
|
|
i_snd_rc = snd_pcm_sw_params_set_avail_min( p_sys->p_snd_pcm, p_sw,
|
|
p_aout->output.i_nb_samples );
|
|
/* start playing when one period has been written */
|
|
i_snd_rc = snd_pcm_sw_params_set_start_threshold( p_sys->p_snd_pcm, p_sw,
|
|
ALSA_DEFAULT_PERIOD_SIZE);
|
|
if( i_snd_rc < 0 )
|
|
{
|
|
msg_Err( p_aout, "unable to set start threshold (%s)",
|
|
snd_strerror( i_snd_rc ) );
|
|
goto error;
|
|
}
|
|
|
|
/* Commit software parameters. */
|
|
if ( snd_pcm_sw_params( p_sys->p_snd_pcm, p_sw ) < 0 )
|
|
{
|
|
msg_Err( p_aout, "unable to set software configuration" );
|
|
goto error;
|
|
}
|
|
|
|
#ifdef ALSA_DEBUG
|
|
snd_output_printf( p_sys->p_snd_stderr, "\nALSA hardware setup:\n\n" );
|
|
snd_pcm_dump_hw_setup( p_sys->p_snd_pcm, p_sys->p_snd_stderr );
|
|
snd_output_printf( p_sys->p_snd_stderr, "\nALSA software setup:\n\n" );
|
|
snd_pcm_dump_sw_setup( p_sys->p_snd_pcm, p_sys->p_snd_stderr );
|
|
snd_output_printf( p_sys->p_snd_stderr, "\n" );
|
|
#endif
|
|
|
|
/* Create ALSA thread and wait for its readiness. */
|
|
if( vlc_thread_create( p_aout, "aout", ALSAThread,
|
|
VLC_THREAD_PRIORITY_OUTPUT, VLC_FALSE ) )
|
|
{
|
|
msg_Err( p_aout, "cannot create ALSA thread (%m)" );
|
|
goto error;
|
|
}
|
|
|
|
return 0;
|
|
|
|
error:
|
|
snd_pcm_close( p_sys->p_snd_pcm );
|
|
#ifdef ALSA_DEBUG
|
|
snd_output_close( p_sys->p_snd_stderr );
|
|
#endif
|
|
free( p_sys );
|
|
return VLC_EGENERIC;
|
|
}
|
|
|
|
/*****************************************************************************
|
|
* Play: nothing to do
|
|
*****************************************************************************/
|
|
static void Play( aout_instance_t *p_aout )
|
|
{
|
|
if( !p_aout->output.p_sys->b_playing )
|
|
{
|
|
p_aout->output.p_sys->b_playing = 1;
|
|
|
|
/* get the playing date of the first aout buffer */
|
|
p_aout->output.p_sys->start_date =
|
|
aout_FifoFirstDate( p_aout, &p_aout->output.fifo );
|
|
|
|
/* wake up the audio output thread */
|
|
vlc_mutex_lock( &p_aout->output.p_sys->lock );
|
|
vlc_cond_signal( &p_aout->output.p_sys->wait );
|
|
vlc_mutex_unlock( &p_aout->output.p_sys->lock );
|
|
}
|
|
}
|
|
|
|
/*****************************************************************************
|
|
* Close: close the ALSA device
|
|
*****************************************************************************/
|
|
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;
|
|
int i_snd_rc;
|
|
|
|
/* make sure the audio output thread is waken up */
|
|
vlc_mutex_lock( &p_aout->output.p_sys->lock );
|
|
vlc_cond_signal( &p_aout->output.p_sys->wait );
|
|
vlc_mutex_unlock( &p_aout->output.p_sys->lock );
|
|
|
|
vlc_object_kill( p_aout );
|
|
vlc_thread_join( p_aout );
|
|
p_aout->b_die = VLC_FALSE;
|
|
|
|
i_snd_rc = snd_pcm_close( p_sys->p_snd_pcm );
|
|
|
|
if( i_snd_rc > 0 )
|
|
{
|
|
msg_Err( p_aout, "failed closing ALSA device (%s)",
|
|
snd_strerror( i_snd_rc ) );
|
|
}
|
|
|
|
#ifdef ALSA_DEBUG
|
|
snd_output_close( p_sys->p_snd_stderr );
|
|
#endif
|
|
|
|
free( p_sys );
|
|
}
|
|
|
|
/*****************************************************************************
|
|
* ALSAThread: asynchronous thread used to DMA the data to the device
|
|
*****************************************************************************/
|
|
static int ALSAThread( aout_instance_t * p_aout )
|
|
{
|
|
p_aout->output.p_sys->p_status =
|
|
(snd_pcm_status_t *)malloc(snd_pcm_status_sizeof());
|
|
|
|
/* Wait for the exact time to start playing (avoids resampling) */
|
|
vlc_mutex_lock( &p_aout->output.p_sys->lock );
|
|
if( !p_aout->output.p_sys->start_date )
|
|
vlc_cond_wait( &p_aout->output.p_sys->wait,
|
|
&p_aout->output.p_sys->lock );
|
|
vlc_mutex_unlock( &p_aout->output.p_sys->lock );
|
|
|
|
mwait( p_aout->output.p_sys->start_date - AOUT_PTS_TOLERANCE / 4 );
|
|
|
|
while ( !p_aout->b_die )
|
|
{
|
|
ALSAFill( p_aout );
|
|
}
|
|
|
|
free( p_aout->output.p_sys->p_status );
|
|
return 0;
|
|
}
|
|
|
|
/*****************************************************************************
|
|
* ALSAFill: function used to fill the ALSA buffer as much as possible
|
|
*****************************************************************************/
|
|
static void ALSAFill( aout_instance_t * p_aout )
|
|
{
|
|
struct aout_sys_t * p_sys = p_aout->output.p_sys;
|
|
aout_buffer_t * p_buffer;
|
|
snd_pcm_status_t * p_status = p_sys->p_status;
|
|
int i_snd_rc;
|
|
mtime_t next_date;
|
|
|
|
/* Fill in the buffer until space or audio output buffer shortage */
|
|
{
|
|
/* Get the status */
|
|
i_snd_rc = snd_pcm_status( p_sys->p_snd_pcm, p_status );
|
|
if( i_snd_rc < 0 )
|
|
{
|
|
msg_Err( p_aout, "unable to get the device's status (%s)",
|
|
snd_strerror( i_snd_rc ) );
|
|
|
|
msleep( p_sys->i_period_time >> 1 );
|
|
return;
|
|
}
|
|
|
|
/* Handle buffer underruns and reget the status */
|
|
if( snd_pcm_status_get_state( p_status ) == SND_PCM_STATE_XRUN )
|
|
{
|
|
/* Prepare the device */
|
|
i_snd_rc = snd_pcm_prepare( p_sys->p_snd_pcm );
|
|
|
|
if( i_snd_rc == 0 )
|
|
{
|
|
msg_Dbg( p_aout, "recovered from buffer underrun" );
|
|
|
|
/* Reget the status */
|
|
i_snd_rc = snd_pcm_status( p_sys->p_snd_pcm, p_status );
|
|
if( i_snd_rc < 0 )
|
|
{
|
|
msg_Err( p_aout, "unable to get the device's status after "
|
|
"recovery (%s)", snd_strerror( i_snd_rc ) );
|
|
|
|
msleep( p_sys->i_period_time >> 1 );
|
|
return;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
msg_Err( p_aout, "unable to recover from buffer underrun" );
|
|
|
|
msleep( p_sys->i_period_time >> 1 );
|
|
return;
|
|
}
|
|
|
|
/* Underrun, try to recover as quickly as possible */
|
|
next_date = mdate();
|
|
}
|
|
else
|
|
{
|
|
/* Here the device should be either in the RUNNING state.
|
|
* p_status is valid. */
|
|
|
|
#if 0
|
|
/* This apparently does not work correctly in Alsa 1.0.11 */
|
|
snd_pcm_status_get_tstamp( p_status, &ts_next );
|
|
next_date = (mtime_t)ts_next.tv_sec * 1000000 + ts_next.tv_usec;
|
|
if( next_date )
|
|
{
|
|
next_date += (mtime_t)snd_pcm_status_get_delay(p_status)
|
|
* 1000000 / p_aout->output.output.i_rate;
|
|
}
|
|
else
|
|
#endif
|
|
{
|
|
/* With screwed ALSA drivers the timestamp is always zero;
|
|
* use another method then */
|
|
snd_pcm_sframes_t delay = 0;
|
|
|
|
snd_pcm_delay( p_sys->p_snd_pcm, &delay );
|
|
next_date = mdate() + (mtime_t)(delay) * 1000000 /
|
|
p_aout->output.output.i_rate
|
|
* p_aout->output.output.i_frame_length;
|
|
}
|
|
}
|
|
|
|
p_buffer = aout_OutputNextBuffer( p_aout, next_date,
|
|
(p_aout->output.output.i_format ==
|
|
VLC_FOURCC('s','p','d','i')) );
|
|
|
|
/* Audio output buffer shortage -> stop the fill process and wait */
|
|
if( p_buffer == NULL )
|
|
{
|
|
msleep( p_sys->i_period_time >> 1 );
|
|
return;
|
|
}
|
|
|
|
i_snd_rc = snd_pcm_writei( p_sys->p_snd_pcm, p_buffer->p_buffer,
|
|
p_buffer->i_nb_samples );
|
|
|
|
if( i_snd_rc == -ESTRPIPE )
|
|
{ /* a suspend event occurred
|
|
* (stream is suspended and waiting for an application recovery) */
|
|
msg_Dbg( p_aout, "entering in suspend mode, trying to resume..." );
|
|
while( !p_aout->b_die && !p_aout->p_libvlc->b_die &&
|
|
( i_snd_rc = snd_pcm_resume( p_sys->p_snd_pcm ) ) == -EAGAIN )
|
|
msleep( 100000 );
|
|
i_snd_rc = snd_pcm_writei( p_sys->p_snd_pcm, p_buffer->p_buffer,
|
|
p_buffer->i_nb_samples );
|
|
|
|
}
|
|
|
|
if( i_snd_rc < 0 )
|
|
{
|
|
msg_Err( p_aout, "write failed (%s)",
|
|
snd_strerror( i_snd_rc ) );
|
|
}
|
|
|
|
aout_BufferFree( p_buffer );
|
|
}
|
|
}
|
|
|
|
static void GetDevicesForCard( module_config_t *p_item, int i_card );
|
|
static void GetDevices( module_config_t *p_item );
|
|
|
|
/*****************************************************************************
|
|
* config variable callback
|
|
*****************************************************************************/
|
|
static int FindDevicesCallback( vlc_object_t *p_this, char const *psz_name,
|
|
vlc_value_t newval, vlc_value_t oldval, void *p_unused )
|
|
{
|
|
module_config_t *p_item;
|
|
int i;
|
|
|
|
p_item = config_FindConfig( p_this, psz_name );
|
|
if( !p_item ) return VLC_SUCCESS;
|
|
|
|
/* Clear-up the current list */
|
|
if( p_item->i_list )
|
|
{
|
|
/* Keep the first entrie */
|
|
for( i = 1; i < p_item->i_list; i++ )
|
|
{
|
|
free( (char *)p_item->ppsz_list[i] );
|
|
free( (char *)p_item->ppsz_list_text[i] );
|
|
}
|
|
/* TODO: Remove when no more needed */
|
|
p_item->ppsz_list[i] = NULL;
|
|
p_item->ppsz_list_text[i] = NULL;
|
|
}
|
|
p_item->i_list = 1;
|
|
|
|
GetDevices( p_item );
|
|
|
|
/* Signal change to the interface */
|
|
p_item->b_dirty = VLC_TRUE;
|
|
|
|
return VLC_SUCCESS;
|
|
|
|
}
|
|
|
|
|
|
static void GetDevicesForCard( module_config_t *p_item, int i_card )
|
|
{
|
|
int i_pcm_device = -1;
|
|
int i_err = 0;
|
|
snd_pcm_info_t *p_pcm_info;
|
|
snd_ctl_t *p_ctl;
|
|
char psz_dev[64];
|
|
char *psz_card_name;
|
|
|
|
sprintf( psz_dev, "hw:%i", i_card );
|
|
|
|
if( ( i_err = snd_ctl_open( &p_ctl, psz_dev, 0 ) ) < 0 )
|
|
return;
|
|
|
|
if( ( i_err = snd_card_get_name( i_card, &psz_card_name ) ) != 0)
|
|
psz_card_name = _("Unknown soundcard");
|
|
|
|
snd_pcm_info_alloca( &p_pcm_info );
|
|
|
|
for (;;)
|
|
{
|
|
char *psz_device, *psz_descr;
|
|
if( ( i_err = snd_ctl_pcm_next_device( p_ctl, &i_pcm_device ) ) < 0 )
|
|
i_pcm_device = -1;
|
|
if( i_pcm_device < 0 )
|
|
break;
|
|
|
|
snd_pcm_info_set_device( p_pcm_info, i_pcm_device );
|
|
snd_pcm_info_set_subdevice( p_pcm_info, 0 );
|
|
snd_pcm_info_set_stream( p_pcm_info, SND_PCM_STREAM_PLAYBACK );
|
|
|
|
if( ( i_err = snd_ctl_pcm_info( p_ctl, p_pcm_info ) ) < 0 )
|
|
{
|
|
if( i_err != -ENOENT )
|
|
{
|
|
/*printf( "get_devices_for_card(): "
|
|
"snd_ctl_pcm_info() "
|
|
"failed (%d:%d): %s.\n", i_card,
|
|
i_pcm_device, snd_strerror( -i_err ) );*/
|
|
}
|
|
continue;
|
|
}
|
|
|
|
asprintf( &psz_device, "hw:%d,%d", i_card, i_pcm_device );
|
|
asprintf( &psz_descr, "%s: %s (%s)", psz_card_name,
|
|
snd_pcm_info_get_name(p_pcm_info), psz_device );
|
|
|
|
p_item->ppsz_list =
|
|
(const char **)realloc( p_item->ppsz_list,
|
|
(p_item->i_list + 2) * sizeof(char *) );
|
|
p_item->ppsz_list_text =
|
|
(const char **)realloc( p_item->ppsz_list_text,
|
|
(p_item->i_list + 2) * sizeof(char *) );
|
|
p_item->ppsz_list[ p_item->i_list ] = psz_device;
|
|
p_item->ppsz_list_text[ p_item->i_list ] = psz_descr;
|
|
p_item->i_list++;
|
|
p_item->ppsz_list[ p_item->i_list ] = NULL;
|
|
p_item->ppsz_list_text[ p_item->i_list ] = NULL;
|
|
}
|
|
|
|
snd_ctl_close( p_ctl );
|
|
}
|
|
|
|
|
|
|
|
static void GetDevices( module_config_t *p_item )
|
|
{
|
|
int i_card = -1;
|
|
int i_err = 0;
|
|
|
|
if( ( i_err = snd_card_next( &i_card ) ) != 0 )
|
|
{
|
|
/*printf( "snd_card_next() failed: %s", snd_strerror( -i_err ) );*/
|
|
return;
|
|
}
|
|
|
|
while( i_card > -1 )
|
|
{
|
|
GetDevicesForCard( p_item, i_card );
|
|
if( ( i_err = snd_card_next( &i_card ) ) != 0 )
|
|
{
|
|
/*printf( "snd_card_next() failed: %s", snd_strerror( -i_err ) );*/
|
|
break;
|
|
}
|
|
}
|
|
}
|