/*****************************************************************************
* alsa.c : alsa plugin for vlc
*****************************************************************************
- * Copyright (C) 2000-2001 VideoLAN
- * $Id: alsa.c,v 1.2 2002/08/14 10:50:12 bozo Exp $
+ * Copyright (C) 2000-2001 the VideoLAN team
+ * $Id$
*
* Authors: Henri Fallon <henri@videolan.org> - Original Author
* Jeffrey Baker <jwbaker@acm.org> - Port to ALSA 1.0 API
* 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
#include "aout_internal.h"
-/* ALSA part */
+/* ALSA part
+ Note: we use the new API which is available since 0.9.0beta10a. */
+#define ALSA_PCM_NEW_HW_PARAMS_API
+#define ALSA_PCM_NEW_SW_PARAMS_API
#include <alsa/asoundlib.h>
/*****************************************************************************
struct aout_sys_t
{
snd_pcm_t * p_snd_pcm;
- snd_pcm_sframes_t i_buffer_size;
- int i_period_time;
-
- volatile vlc_bool_t b_initialized;
+ unsigned int i_period_time;
-#ifdef DEBUG
+#ifdef ALSA_DEBUG
snd_output_t * p_snd_stderr;
#endif
+
+ int b_playing; /* playing status */
+ mtime_t start_date;
+
+ vlc_mutex_t lock;
+ vlc_cond_t wait ;
+
+ snd_pcm_status_t *p_status;
};
+#define A52_FRAME_NB 1536
+
/* These values are in frames.
- * To convert them to a numer of bytes you have to multiply them by the
- * number of channel(s) (eg. 2 for stereo) and the size of a sample (eg.
- * 2 for s16). */
-#define ALSA_DEFAULT_PERIOD_SIZE 2048
-#define ALSA_DEFAULT_BUFFER_SIZE ( ALSA_DEFAULT_PERIOD_SIZE << 4 )
-#define ALSA_SPDIF_PERIOD_SIZE 1536
+ To convert them to a number of bytes you have to multiply them by the
+ number of channel(s) (eg. 2 for stereo) and the size of a sample (eg.
+ 2 for int16_t). */
+#define ALSA_DEFAULT_PERIOD_SIZE 1024
+#define ALSA_DEFAULT_BUFFER_SIZE ( ALSA_DEFAULT_PERIOD_SIZE << 8 )
+#define ALSA_SPDIF_PERIOD_SIZE A52_FRAME_NB
#define ALSA_SPDIF_BUFFER_SIZE ( ALSA_SPDIF_PERIOD_SIZE << 4 )
+/* Why << 4 ? --Meuuh */
+/* Why not ? --Bozo */
+/* Right. --Meuuh */
+
+#define DEFAULT_ALSA_DEVICE N_("default")
/*****************************************************************************
* Local prototypes
*****************************************************************************/
static int Open ( vlc_object_t * );
static void Close ( vlc_object_t * );
-
-static int SetFormat ( aout_instance_t * );
-static void Play ( aout_instance_t *,
- aout_buffer_t * );
-
+static void Play ( aout_instance_t * );
static int ALSAThread ( aout_instance_t * );
static void ALSAFill ( aout_instance_t * );
+static int FindDevicesCallback( vlc_object_t *p_this, char const *psz_name,
+ vlc_value_t newval, vlc_value_t oldval, void *p_unused );
/*****************************************************************************
* Module descriptor
*****************************************************************************/
+static char *ppsz_devices[] = { "default" };
+static char *ppsz_devices_text[] = { N_("Default") };
vlc_module_begin();
- add_category_hint( N_("Audio"), NULL );
- add_string( "alsa-device", NULL, NULL, N_("Name"), NULL );
- set_description( _("ALSA audio module") );
- set_capability( "audio output", 50 );
+ set_shortname( "ALSA" );
+ set_description( _("ALSA audio output") );
+ set_category( CAT_AUDIO );
+ set_subcategory( SUBCAT_AUDIO_AOUT );
+ add_string( "alsadev", DEFAULT_ALSA_DEVICE, aout_FindAndRestart,
+ N_("ALSA Device Name"), NULL, VLC_FALSE );
+ change_string_list( ppsz_devices, ppsz_devices_text, FindDevicesCallback );
+ change_action_add( FindDevicesCallback, N_("Refresh list") );
+
+ set_capability( "audio output", 150 );
set_callbacks( Open, Close );
vlc_module_end();
/*****************************************************************************
- * Open: create a handle and open an alsa device
- *****************************************************************************
- * This function opens an alsa device, through the alsa API
+ * Probe: probe the audio device for available formats and channels
*****************************************************************************/
-static int Open( vlc_object_t *p_this )
+static void Probe( aout_instance_t * p_aout,
+ const char * psz_device, const char * psz_iec_device,
+ int *pi_snd_pcm_format )
{
- aout_instance_t * p_aout = (aout_instance_t *)p_this;
- struct aout_sys_t * p_sys;
- char * psz_device;
+ struct aout_sys_t * p_sys = p_aout->output.p_sys;
+ vlc_value_t val, text;
+ int i_ret;
- /* Allows user to choose which ALSA device to use */
- char psz_alsadev[128];
- char * psz_userdev;
- int i_snd_rc;
+ var_Create ( p_aout, "audio-device", VLC_VAR_INTEGER | VLC_VAR_HASCHOICE );
+ text.psz_string = _("Audio Device");
+ var_Change( p_aout, "audio-device", VLC_VAR_SETTEXT, &text, NULL );
- /* Allocate structures */
- p_aout->output.p_sys = p_sys = malloc( sizeof( aout_sys_t ) );
- if( p_sys == NULL )
+ /* We'll open the audio device in non blocking mode so we can just exit
+ * when it is already in use, but for the real stuff we'll still use
+ * the blocking mode */
+
+ /* Now test linear PCM capabilities */
+ if ( !(i_ret = snd_pcm_open( &p_sys->p_snd_pcm, psz_device,
+ SND_PCM_STREAM_PLAYBACK,
+ SND_PCM_NONBLOCK ) ) )
{
- msg_Err( p_aout, "out of memory" );
- return -1;
- }
+ int i_channels;
+ snd_pcm_hw_params_t * p_hw;
+ snd_pcm_hw_params_alloca (&p_hw);
-#ifdef DEBUG
- snd_output_stdio_attach( &p_sys->p_snd_stderr, stderr, 0 );
-#endif
+ if ( snd_pcm_hw_params_any( p_sys->p_snd_pcm, p_hw ) < 0 )
+ {
+ msg_Warn( p_aout, "unable to retrieve initial hardware parameters"
+ ", disabling linear PCM audio" );
+ snd_pcm_close( p_sys->p_snd_pcm );
+ var_Destroy( p_aout, "audio-device" );
+ return;
+ }
- /* Read in ALSA device preferences from configuration */
- psz_userdev = config_GetPsz( p_aout, "alsa-device" );
+ if ( snd_pcm_hw_params_set_format( p_sys->p_snd_pcm, p_hw,
+ *pi_snd_pcm_format ) < 0 )
+ {
+ int i_snd_rc = -1;
- if( psz_userdev )
- {
- psz_device = psz_userdev;
- }
- else
- {
- /* Use the internal logic to decide on the device name */
- if ( p_aout->output.output.i_format == AOUT_FMT_SPDIF )
+ if( *pi_snd_pcm_format != SND_PCM_FORMAT_S16 )
+ {
+ *pi_snd_pcm_format = SND_PCM_FORMAT_S16;
+ i_snd_rc = snd_pcm_hw_params_set_format( p_sys->p_snd_pcm,
+ p_hw, *pi_snd_pcm_format );
+ }
+ if ( i_snd_rc < 0 )
+ {
+ msg_Warn( p_aout, "unable to set stream sample size and "
+ "word order, disabling linear PCM audio" );
+ snd_pcm_close( p_sys->p_snd_pcm );
+ var_Destroy( p_aout, "audio-device" );
+ return;
+ }
+ }
+
+ i_channels = aout_FormatNbChannels( &p_aout->output.output );
+
+ while ( i_channels > 0 )
{
- unsigned char s[4];
- s[0] = IEC958_AES0_CON_EMPHASIS_NONE | IEC958_AES0_NONAUDIO;
- s[1] = IEC958_AES1_CON_ORIGINAL | IEC958_AES1_CON_PCM_CODER;
- s[2] = 0;
- s[3] = IEC958_AES3_CON_FS_48000;
- sprintf( psz_alsadev,
- "iec958:AES0=0x%x,AES1=0x%x,AES2=0x%x,AES3=0x%x",
- s[0], s[1], s[2], s[3] );
- psz_device = psz_alsadev;
- p_sys->i_buffer_size = ALSA_SPDIF_BUFFER_SIZE;
- p_aout->output.i_nb_samples = ALSA_SPDIF_PERIOD_SIZE;
+ if ( !snd_pcm_hw_params_test_channels( p_sys->p_snd_pcm, p_hw,
+ i_channels ) )
+ {
+ switch ( i_channels )
+ {
+ case 1:
+ val.i_int = AOUT_VAR_MONO;
+ text.psz_string = N_("Mono");
+ var_Change( p_aout, "audio-device",
+ VLC_VAR_ADDCHOICE, &val, &text );
+ break;
+ case 2:
+ val.i_int = AOUT_VAR_STEREO;
+ text.psz_string = N_("Stereo");
+ var_Change( p_aout, "audio-device",
+ VLC_VAR_ADDCHOICE, &val, &text );
+ var_Set( p_aout, "audio-device", val );
+ break;
+ case 4:
+ val.i_int = AOUT_VAR_2F2R;
+ text.psz_string = N_("2 Front 2 Rear");
+ var_Change( p_aout, "audio-device",
+ VLC_VAR_ADDCHOICE, &val, &text );
+ break;
+ case 6:
+ val.i_int = AOUT_VAR_5_1;
+ text.psz_string = N_("5.1");
+ var_Change( p_aout, "audio-device",
+ VLC_VAR_ADDCHOICE, &val, &text );
+ break;
+ }
+ }
+
+ --i_channels;
}
- else
+
+ /* Special case for mono on stereo only boards */
+ i_channels = aout_FormatNbChannels( &p_aout->output.output );
+ var_Change( p_aout, "audio-device", VLC_VAR_CHOICESCOUNT, &val, NULL );
+ if( val.i_int <= 0 && i_channels == 1 )
{
- psz_device = "default";
- p_sys->i_buffer_size = ALSA_DEFAULT_BUFFER_SIZE;
- p_aout->output.i_nb_samples = ALSA_DEFAULT_PERIOD_SIZE;
+ if ( !snd_pcm_hw_params_test_channels( p_sys->p_snd_pcm, p_hw, 2 ))
+ {
+ val.i_int = AOUT_VAR_STEREO;
+ text.psz_string = N_("Stereo");
+ var_Change( p_aout, "audio-device",
+ VLC_VAR_ADDCHOICE, &val, &text );
+ var_Set( p_aout, "audio-device", val );
+ }
}
+
+ /* Close the previously opened device */
+ snd_pcm_close( p_sys->p_snd_pcm );
}
-
- /* Open device */
- i_snd_rc = snd_pcm_open( &p_sys->p_snd_pcm, psz_device,
- SND_PCM_STREAM_PLAYBACK, SND_PCM_NONBLOCK);
- if( i_snd_rc < 0 )
+ else if ( i_ret == -EBUSY )
{
- msg_Err( p_aout, "cannot open ALSA device `%s' (%s)",
- psz_device, snd_strerror(i_snd_rc) );
- if( psz_userdev )
- free( psz_userdev );
- free( p_sys );
- p_sys->p_snd_pcm = NULL;
- return -1;
+ msg_Warn( p_aout, "audio device: %s is already in use", psz_device );
}
- if( psz_userdev )
+ /* Test for S/PDIF device if needed */
+ if ( psz_iec_device )
{
- free( psz_userdev );
+ /* Opening the device should be enough */
+ if ( !(i_ret = snd_pcm_open( &p_sys->p_snd_pcm, psz_iec_device,
+ SND_PCM_STREAM_PLAYBACK,
+ SND_PCM_NONBLOCK ) ) )
+ {
+ val.i_int = AOUT_VAR_SPDIF;
+ text.psz_string = N_("A/52 over S/PDIF");
+ var_Change( p_aout, "audio-device",
+ VLC_VAR_ADDCHOICE, &val, &text );
+ if( config_GetInt( p_aout, "spdif" ) )
+ var_Set( p_aout, "audio-device", val );
+
+ snd_pcm_close( p_sys->p_snd_pcm );
+ }
+ else if ( i_ret == -EBUSY )
+ {
+ msg_Warn( p_aout, "audio device: %s is already in use",
+ psz_iec_device );
+ }
}
- /* Create ALSA thread and wait for its readiness. */
- p_sys->b_initialized = VLC_FALSE;
- if( vlc_thread_create( p_aout, "aout", ALSAThread, VLC_FALSE ) )
+ var_Change( p_aout, "audio-device", VLC_VAR_CHOICESCOUNT, &val, NULL );
+ if( val.i_int <= 0 )
{
- msg_Err( p_aout, "cannot create ALSA thread (%s)", strerror(errno) );
- if( psz_userdev )
- free( psz_userdev );
- free( p_sys );
- return -1;
+ /* Probe() has failed. */
+ msg_Dbg( p_aout, "failed to find a useable alsa configuration" );
+ var_Destroy( p_aout, "audio-device" );
+ return;
}
- p_aout->output.pf_setformat = SetFormat;
- p_aout->output.pf_play = Play;
-
- return 0;
+ /* Add final settings to the variable */
+ var_AddCallback( p_aout, "audio-device", aout_ChannelsRestart, NULL );
+ val.b_bool = VLC_TRUE;
+ var_Set( p_aout, "intf-change", val );
}
/*****************************************************************************
- * SetFormat : sets the alsa output format
+ * Open: create a handle and open an alsa device
*****************************************************************************
- * This function prepares the device, sets the rate, format, the mode
- * ( "play as soon as you have data" ), and buffer information.
+ * This function opens an alsa device, through the alsa API.
+ *
+ * Note: the only heap-allocated string is psz_device. All the other pointers
+ * are references to psz_device or to stack-allocated data.
*****************************************************************************/
-static int SetFormat( aout_instance_t * p_aout )
+static int Open( vlc_object_t *p_this )
{
- struct aout_sys_t * p_sys = p_aout->output.p_sys;
+ aout_instance_t * p_aout = (aout_instance_t *)p_this;
+ struct aout_sys_t * p_sys;
+ vlc_value_t val;
- int i_snd_rc;
- int i_format;
+ char psz_default_iec_device[128]; /* Buffer used to store the default
+ S/PDIF device */
+ char * psz_device, * psz_iec_device; /* device names for PCM and S/PDIF
+ output */
+
+ int i_vlc_pcm_format; /* Audio format for VLC's data */
+ int i_snd_pcm_format; /* Audio format for ALSA's data */
+
+ snd_pcm_uframes_t i_buffer_size = 0;
+ snd_pcm_uframes_t i_period_size = 0;
+ int i_channels = 0;
snd_pcm_hw_params_t *p_hw;
snd_pcm_sw_params_t *p_sw;
- snd_pcm_hw_params_alloca(&p_hw);
- snd_pcm_sw_params_alloca(&p_sw);
+ int i_snd_rc = -1;
+ unsigned int i_old_rate;
+ vlc_bool_t b_retry = VLC_TRUE;
- switch (p_aout->output.output.i_format)
- {
- case AOUT_FMT_MU_LAW: i_format = SND_PCM_FORMAT_MU_LAW; break;
- case AOUT_FMT_A_LAW: i_format = SND_PCM_FORMAT_A_LAW; break;
- case AOUT_FMT_IMA_ADPCM: i_format = SND_PCM_FORMAT_IMA_ADPCM; break;
- case AOUT_FMT_U8: i_format = SND_PCM_FORMAT_U8; break;
- case AOUT_FMT_S16_LE: i_format = SND_PCM_FORMAT_S16_LE; break;
- case AOUT_FMT_S16_BE: i_format = SND_PCM_FORMAT_S16_BE; break;
- case AOUT_FMT_S8: i_format = SND_PCM_FORMAT_S8; break;
- case AOUT_FMT_U16_LE: i_format = SND_PCM_FORMAT_U16_LE; break;
- case AOUT_FMT_U16_BE: i_format = SND_PCM_FORMAT_U16_BE; break;
- case AOUT_FMT_FLOAT32: i_format = SND_PCM_FORMAT_FLOAT; break;
- case AOUT_FMT_FIXED32:
- default:
- msg_Err( p_aout, "audio output format 0x%x not supported",
- p_aout->output.output.i_format );
- return -1;
- break;
+ /* Allocate structures */
+ p_aout->output.p_sys = p_sys = malloc( sizeof( aout_sys_t ) );
+ if( p_sys == NULL )
+ {
+ msg_Err( p_aout, "out of memory" );
+ return VLC_ENOMEM;
+ }
+ p_sys->b_playing = VLC_FALSE;
+ p_sys->start_date = 0;
+ p_sys->p_status = (snd_pcm_status_t *)malloc(snd_pcm_status_sizeof());
+ vlc_cond_init( p_aout, &p_sys->wait );
+ vlc_mutex_init( p_aout, &p_sys->lock );
+
+ /* Get device name */
+ if( (psz_device = config_GetPsz( p_aout, "alsadev" )) == NULL )
+ {
+ msg_Err( p_aout, "no audio device given (maybe \"default\" ?)" );
+ free( p_sys );
+ return VLC_EGENERIC;
}
- i_snd_rc = snd_pcm_hw_params_any( p_sys->p_snd_pcm, p_hw );
- if( i_snd_rc < 0 )
+ /* Choose the IEC device for S/PDIF output:
+ if the device is overriden by the user then it will be the one
+ otherwise we compute the default device based on the output format. */
+ if( AOUT_FMT_NON_LINEAR( &p_aout->output.output )
+ && !strcmp( psz_device, DEFAULT_ALSA_DEVICE ) )
{
- msg_Err( p_aout, "unable to retrieve initial hardware parameters" );
- return -1;
+ snprintf( psz_default_iec_device, sizeof(psz_default_iec_device),
+ "iec958:AES0=0x%x,AES1=0x%x,AES2=0x%x,AES3=0x%x",
+ IEC958_AES0_CON_EMPHASIS_NONE | IEC958_AES0_NONAUDIO,
+ IEC958_AES1_CON_ORIGINAL | IEC958_AES1_CON_PCM_CODER,
+ 0,
+ ( p_aout->output.output.i_rate == 48000 ?
+ IEC958_AES3_CON_FS_48000 :
+ ( p_aout->output.output.i_rate == 44100 ?
+ IEC958_AES3_CON_FS_44100 : IEC958_AES3_CON_FS_32000 ) ) );
+ psz_iec_device = psz_default_iec_device;
+ }
+ else if( AOUT_FMT_NON_LINEAR( &p_aout->output.output ) )
+ {
+ psz_iec_device = psz_device;
+ }
+ else
+ {
+ psz_iec_device = NULL;
}
- i_snd_rc = snd_pcm_hw_params_set_access( p_sys->p_snd_pcm, p_hw,
- SND_PCM_ACCESS_RW_INTERLEAVED );
- if( i_snd_rc < 0 )
+ /* Choose the linear PCM format (read the comment above about FPU
+ and float32) */
+ if( p_aout->p_libvlc->i_cpu & CPU_CAPABILITY_FPU )
+ {
+ i_vlc_pcm_format = VLC_FOURCC('f','l','3','2');
+ i_snd_pcm_format = SND_PCM_FORMAT_FLOAT;
+ }
+ else
{
- msg_Err( p_aout, "unable to set interleaved stream format" );
- return -1;
+ i_vlc_pcm_format = AOUT_FMT_S16_NE;
+ 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_format );
- if( i_snd_rc < 0 )
+ /* If the variable doesn't exist then it's the first time we're called
+ and we have to probe the available audio formats and channels */
+ if ( var_Type( p_aout, "audio-device" ) == 0 )
{
- msg_Err( p_aout, "unable to set stream sample size and word order" );
- return -1;
+ Probe( p_aout, psz_device, psz_iec_device, &i_snd_pcm_format );
}
- i_snd_rc = snd_pcm_hw_params_set_channels( p_sys->p_snd_pcm, p_hw,
- p_aout->output.output.i_channels );
- if( i_snd_rc < 0 )
+ if ( var_Get( p_aout, "audio-device", &val ) < 0 )
{
- msg_Err( p_aout, "unable to set number of output channels" );
- return -1;
+ free( p_sys );
+ free( psz_device );
+ return VLC_EGENERIC;
}
- i_snd_rc = snd_pcm_hw_params_set_rate( p_sys->p_snd_pcm, p_hw,
- p_aout->output.output.i_rate, 0 );
- if( i_snd_rc < 0 )
+ p_aout->output.output.i_format = i_vlc_pcm_format;
+ if ( val.i_int == AOUT_VAR_5_1 )
+ {
+ p_aout->output.output.i_physical_channels
+ = AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT | AOUT_CHAN_CENTER
+ | AOUT_CHAN_REARLEFT | AOUT_CHAN_REARRIGHT
+ | AOUT_CHAN_LFE;
+ free( psz_device );
+ psz_device = strdup( "surround51" );
+ }
+ else if ( val.i_int == AOUT_VAR_2F2R )
{
- msg_Err( p_aout, "unable to set sample rate" );
- return -1;
+ p_aout->output.output.i_physical_channels
+ = AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT
+ | AOUT_CHAN_REARLEFT | AOUT_CHAN_REARRIGHT;
+ free( psz_device );
+ psz_device = strdup( "surround40" );
}
+ else if ( val.i_int == AOUT_VAR_STEREO )
+ {
+ p_aout->output.output.i_physical_channels
+ = AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT;
+ }
+ else if ( val.i_int == AOUT_VAR_MONO )
+ {
+ p_aout->output.output.i_physical_channels = AOUT_CHAN_CENTER;
+ }
+ else
+ {
+ /* This should not happen ! */
+ msg_Err( p_aout, "internal: can't find audio-device (%i)", val.i_int );
+ free( p_sys );
+ free( psz_device );
+ return VLC_EGENERIC;
+ }
+
+#ifdef ALSA_DEBUG
+ snd_output_stdio_attach( &p_sys->p_snd_stderr, stderr, 0 );
+#endif
- i_snd_rc = snd_pcm_hw_params_set_buffer_size_near( p_sys->p_snd_pcm, p_hw,
- p_sys->i_buffer_size );
- if( i_snd_rc < 0 )
+ /* Open the device */
+ if ( val.i_int == AOUT_VAR_SPDIF )
{
- msg_Err( p_aout, "unable to set buffer time" );
- return -1;
+ if ( ( i_snd_rc = snd_pcm_open( &p_sys->p_snd_pcm, psz_iec_device,
+ SND_PCM_STREAM_PLAYBACK, 0 ) ) < 0 )
+ {
+ msg_Err( p_aout, "cannot open ALSA device `%s' (%s)",
+ psz_iec_device, snd_strerror( i_snd_rc ) );
+ free( p_sys );
+ free( psz_device );
+ return VLC_EGENERIC;
+ }
+ i_buffer_size = ALSA_SPDIF_BUFFER_SIZE;
+ i_snd_pcm_format = SND_PCM_FORMAT_S16;
+ i_channels = 2;
+
+ i_vlc_pcm_format = VLC_FOURCC('s','p','d','i');
+ p_aout->output.i_nb_samples = i_period_size = ALSA_SPDIF_PERIOD_SIZE;
+ p_aout->output.output.i_bytes_per_frame = AOUT_SPDIF_SIZE;
+ p_aout->output.output.i_frame_length = A52_FRAME_NB;
+
+ aout_VolumeNoneInit( p_aout );
}
- p_sys->i_buffer_size = i_snd_rc;
+ else
+ {
+ int i;
+
+ 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. */
- i_snd_rc = snd_pcm_hw_params_set_period_size_near(
- p_sys->p_snd_pcm, p_hw, p_aout->output.i_nb_samples, 0 );
- if( i_snd_rc < 0 )
+ 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 );
+ continue;
+ }
+ break;
+ }
+ if( i_snd_rc < 0 )
+ {
+ msg_Err( p_aout, "cannot open 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 )
{
- msg_Err( p_aout, "unable to set period size" );
- return -1;
+ 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;
+ }
+ }
}
- p_aout->output.i_nb_samples = i_snd_rc;
- p_sys->i_period_time = snd_pcm_hw_params_get_period_time( p_hw, 0 );
- i_snd_rc = snd_pcm_hw_params( p_sys->p_snd_pcm, p_hw );
- if (i_snd_rc < 0)
+#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 set hardware configuration" );
- return -1;
+ 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 );
- i_snd_rc = snd_pcm_sw_params( p_sys->p_snd_pcm, p_sw );
- if( i_snd_rc < 0 )
+ /* 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" );
- return -1;
+ goto error;
}
-#ifdef DEBUG
+#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_output_printf( p_sys->p_snd_stderr, "\n" );
#endif
- p_sys->b_initialized = VLC_TRUE;
+ /* 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 (%s)", strerror(errno) );
+ 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: queue a buffer for playing by ALSAThread
+ * Play: nothing to do
*****************************************************************************/
-static void Play( aout_instance_t *p_aout, aout_buffer_t * p_buffer )
+static void Play( aout_instance_t *p_aout )
{
- aout_FifoPush( p_aout, &p_aout->output.fifo, p_buffer );
+ 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
+ * Close: close the ALSA device
*****************************************************************************/
static void Close( vlc_object_t *p_this )
{
struct aout_sys_t * p_sys = p_aout->output.p_sys;
int i_snd_rc;
- p_aout->b_die = 1;
+ /* 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 );
+
+ p_aout->b_die = VLC_TRUE;
vlc_thread_join( p_aout );
+ p_aout->b_die = VLC_FALSE;
- if( p_sys->p_snd_pcm )
- {
- i_snd_rc = snd_pcm_close( p_sys->p_snd_pcm );
+ 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 ) );
- }
+ 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->p_status );
free( p_sys );
}
*****************************************************************************/
static int ALSAThread( aout_instance_t * p_aout )
{
- struct aout_sys_t * p_sys = p_aout->output.p_sys;
+ /* 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 )
{
- if( !p_sys->b_initialized )
- {
- msleep( THREAD_SLEEP );
- continue;
- }
-
ALSAFill( p_aout );
-
- msleep( p_sys->i_period_time );
}
return 0;
struct aout_sys_t * p_sys = p_aout->output.p_sys;
aout_buffer_t * p_buffer;
- mtime_t next_date = 0;
- snd_pcm_status_t * p_status;
+ snd_pcm_status_t * p_status = p_sys->p_status;
snd_timestamp_t ts_next;
- int i_snd_rc, i_size;
- byte_t * p_bytes;
- snd_pcm_uframes_t i_avail;
-
- snd_pcm_status_alloca( &p_status );
-
- i_snd_rc = snd_pcm_wait( p_sys->p_snd_pcm, THREAD_SLEEP );
- if( i_snd_rc < 0 )
- {
- msg_Err( p_aout, "alsa device not ready !!! (%s)",
- snd_strerror( i_snd_rc ) );
- return;
- }
+ int i_snd_rc;
+ mtime_t next_date;
- while( VLC_TRUE )
+ /* 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_Err( p_aout, "recovered from buffer underrun" );
- next_date = mdate();
+ msg_Warn( 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 ) );
+ 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;
}
- }
- i_avail = snd_pcm_status_get_avail( p_status );
- if( i_avail >= p_aout->output.i_nb_samples )
+ /* 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. */
+
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
+ {
+ /* With screwed ALSA drivers the timestamp is always zero;
+ * use another method then */
+ snd_pcm_sframes_t delay;
+ ssize_t i_bytes = 0;
- p_buffer = aout_OutputNextBuffer( p_aout, next_date, 0 );
+ if( !snd_pcm_delay( p_sys->p_snd_pcm, &delay ) )
+ {
+ i_bytes = snd_pcm_frames_to_bytes(p_sys->p_snd_pcm, delay);
+ }
+ next_date = mdate() + (mtime_t)i_bytes * 1000000
+ / p_aout->output.output.i_bytes_per_frame
+ / p_aout->output.output.i_rate
+ * p_aout->output.output.i_frame_length;
+ }
+ }
- if( p_buffer == NULL )
- return;
+ p_buffer = aout_OutputNextBuffer( p_aout, next_date,
+ (p_aout->output.output.i_format ==
+ VLC_FOURCC('s','p','d','i')) );
- p_bytes = p_buffer->p_buffer;
+ /* 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_bytes,
- p_buffer->i_nb_samples );
+ 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 ) );
- }
- else
+ 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( p_item->ppsz_list[i] );
+ free( 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)
{
- aout_BufferFree( p_buffer );
+/* 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 =
+ (char **)realloc( p_item->ppsz_list,
+ (p_item->i_list + 2) * sizeof(char *) );
+ p_item->ppsz_list_text =
+ (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)
+ {
+// g_warning("snd_next_card() failed: %s", snd_strerror(-err));
+ return;
+ }
+
+ while (i_card > -1)
+ {
+ GetDevicesForCard(p_item, i_card);
+ if ((i_err = snd_card_next(&i_card)) != 0)
+ {
+// g_warning("snd_next_card() failed: %s",
+// snd_strerror(-err));
+ break;
+ }
+ }
+}
projects / vlc / blobdiff