1 /*****************************************************************************
2 * alsa.c : alsa plugin for vlc
3 *****************************************************************************
4 * Copyright (C) 2000-2010 the VideoLAN team
5 * Copyright (C) 2009-2011 RĂ©mi Denis-Courmont
7 * Authors: Henri Fallon <henri@videolan.org> - Original Author
8 * Jeffrey Baker <jwbaker@acm.org> - Port to ALSA 1.0 API
9 * John Paul Lorenti <jpl31@columbia.edu> - Device selection
10 * Arnaud de Bossoreille de Ribou <bozo@via.ecp.fr> - S/PDIF and aout3
12 * This program is free software; you can redistribute it and/or modify
13 * it under the terms of the GNU General Public License as published by
14 * the Free Software Foundation; either version 2 of the License, or
15 * (at your option) any later version.
17 * This program is distributed in the hope that it will be useful,
18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 * GNU General Public License for more details.
22 * You should have received a copy of the GNU General Public License
23 * along with this program; if not, write to the Free Software
24 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
25 *****************************************************************************/
27 /*****************************************************************************
29 *****************************************************************************/
36 #include <vlc_common.h>
37 #include <vlc_plugin.h>
38 #include <vlc_dialog.h>
42 #include <alsa/asoundlib.h>
43 #include <alsa/version.h>
45 /*#define ALSA_DEBUG*/
47 /*****************************************************************************
48 * aout_sys_t: ALSA audio output method descriptor
49 *****************************************************************************
50 * This structure is part of the audio output thread descriptor.
51 * It describes the ALSA specific properties of an audio device.
52 *****************************************************************************/
56 snd_pcm_t * p_snd_pcm;
57 unsigned int i_period_time;
60 snd_output_t * p_snd_stderr;
68 #define A52_FRAME_NB 1536
70 /* These values are in frames.
71 To convert them to a number of bytes you have to multiply them by the
72 number of channel(s) (eg. 2 for stereo) and the size of a sample (eg.
74 #define ALSA_DEFAULT_PERIOD_SIZE 1024
75 #define ALSA_DEFAULT_BUFFER_SIZE ( ALSA_DEFAULT_PERIOD_SIZE << 8 )
76 #define ALSA_SPDIF_PERIOD_SIZE A52_FRAME_NB
77 #define ALSA_SPDIF_BUFFER_SIZE ( ALSA_SPDIF_PERIOD_SIZE << 4 )
78 /* Why << 4 ? --Meuuh */
79 /* Why not ? --Bozo */
82 #define DEFAULT_ALSA_DEVICE "default"
84 /*****************************************************************************
86 *****************************************************************************/
87 static int Open ( vlc_object_t * );
88 static void Close ( vlc_object_t * );
89 static void Play ( audio_output_t *, block_t * );
90 static void* ALSAThread ( void * );
91 static void ALSAFill ( audio_output_t * );
92 static int FindDevicesCallback( vlc_object_t *p_this, char const *psz_name,
93 vlc_value_t newval, vlc_value_t oldval, void *p_unused );
94 static void GetDevices( vlc_object_t *, module_config_t * );
96 /*****************************************************************************
98 *****************************************************************************/
99 static const char *const ppsz_devices[] = {
100 "default", "plug:front",
101 "plug:side", "plug:rear", "plug:center_lfe",
102 "plug:surround40", "plug:surround41",
103 "plug:surround50", "plug:surround51",
107 static const char *const ppsz_devices_text[] = {
108 N_("Default"), N_("Front speakers"),
109 N_("Side speakers"), N_("Rear speakers"), N_("Center and subwoofer"),
110 N_("Surround 4.0"), N_("Surround 4.1"),
111 N_("Surround 5.0"), N_("Surround 5.1"),
113 N_("HDMI"), N_("S/PDIF"),
116 set_shortname( "ALSA" )
117 set_description( N_("ALSA audio output") )
118 set_category( CAT_AUDIO )
119 set_subcategory( SUBCAT_AUDIO_AOUT )
120 add_string( "alsa-audio-device", DEFAULT_ALSA_DEVICE,
121 N_("ALSA Device Name"), NULL, false )
122 add_deprecated_alias( "alsadev" ) /* deprecated since 0.9.3 */
123 change_string_list( ppsz_devices, ppsz_devices_text, FindDevicesCallback )
124 change_action_add( FindDevicesCallback, N_("Refresh list") )
126 set_capability( "audio output", 150 )
127 set_callbacks( Open, Close )
130 /* VLC will insert a resampling filter in any case, so it is best to turn off
131 * ALSA (plug) resampling. */
132 static const int mode = SND_PCM_NO_AUTO_RESAMPLE
133 /* ALSA just discards extra channels. Not good. Disable it. */
134 | SND_PCM_NO_AUTO_CHANNELS
135 /* VLC is currently unable to leverage ALSA softvol. Disable it. */
136 | SND_PCM_NO_SOFTVOL;
139 * Initializes list of devices.
141 static void Probe (vlc_object_t *obj)
143 /* Due to design bug in audio output core, this hack is required: */
144 if (var_Type (obj, "audio-device"))
147 /* The variable does not exist - first call. */
150 var_Create (obj, "audio-device", VLC_VAR_STRING | VLC_VAR_HASCHOICE);
151 text.psz_string = _("Audio Device");
152 var_Change (obj, "audio-device", VLC_VAR_SETTEXT, &text, NULL);
154 GetDevices (obj, NULL);
156 var_AddCallback (obj, "audio-device", aout_ChannelsRestart, NULL);
157 var_TriggerCallback (obj, "intf-change");
160 /*****************************************************************************
161 * Open: create a handle and open an alsa device
162 *****************************************************************************
163 * This function opens an alsa device, through the alsa API.
165 * Note: the only heap-allocated string is psz_device. All the other pointers
166 * are references to psz_device or to stack-allocated data.
167 *****************************************************************************/
168 static int Open (vlc_object_t *obj)
170 audio_output_t * p_aout = (audio_output_t *)obj;
172 /* Get device name */
175 if (var_Type (p_aout, "audio-device"))
176 psz_device = var_GetString (p_aout, "audio-device");
178 psz_device = var_InheritString( p_aout, "alsa-audio-device" );
179 if (unlikely(psz_device == NULL))
182 snd_pcm_format_t pcm_format; /* ALSA sample format */
183 vlc_fourcc_t fourcc = p_aout->format.i_format;
189 pcm_format = SND_PCM_FORMAT_FLOAT64_BE;
192 pcm_format = SND_PCM_FORMAT_FLOAT64_LE;
195 pcm_format = SND_PCM_FORMAT_FLOAT_BE;
198 pcm_format = SND_PCM_FORMAT_FLOAT_LE;
201 fourcc = VLC_CODEC_FL32;
202 pcm_format = SND_PCM_FORMAT_FLOAT;
205 pcm_format = SND_PCM_FORMAT_S32_BE;
208 pcm_format = SND_PCM_FORMAT_S32_LE;
211 pcm_format = SND_PCM_FORMAT_S24_3BE;
214 pcm_format = SND_PCM_FORMAT_S24_3LE;
217 pcm_format = SND_PCM_FORMAT_U24_3BE;
220 pcm_format = SND_PCM_FORMAT_U24_3LE;
223 pcm_format = SND_PCM_FORMAT_S16_BE;
226 pcm_format = SND_PCM_FORMAT_S16_LE;
229 pcm_format = SND_PCM_FORMAT_U16_BE;
232 pcm_format = SND_PCM_FORMAT_U16_LE;
235 pcm_format = SND_PCM_FORMAT_S8;
238 pcm_format = SND_PCM_FORMAT_U8;
241 if (AOUT_FMT_NON_LINEAR(&p_aout->format))
242 spdif = var_InheritBool (p_aout, "spdif");
245 fourcc = VLC_CODEC_FL32;
246 pcm_format = SND_PCM_FORMAT_FLOAT;
250 fourcc = VLC_CODEC_S16N;
251 pcm_format = SND_PCM_FORMAT_S16;
255 /* Choose the IEC device for S/PDIF output:
256 if the device is overridden by the user then it will be the one
257 otherwise we compute the default device based on the output format. */
258 if (spdif && !strcmp (psz_device, DEFAULT_ALSA_DEVICE))
262 switch (p_aout->format.i_rate)
265 case freq: aes3 = IEC958_AES3_CON_FS_ ## freq; break;
266 FS( 44100) /* def. */ FS( 48000) FS( 32000)
267 FS( 22050) FS( 24000)
268 FS( 88200) FS(768000) FS( 96000)
269 FS(176400) FS(192000)
272 aes3 = IEC958_AES3_CON_FS_NOTID;
277 if (asprintf (&psz_device,
278 "iec958:AES0=0x%x,AES1=0x%x,AES2=0x%x,AES3=0x%x",
279 IEC958_AES0_CON_EMPHASIS_NONE | IEC958_AES0_NONAUDIO,
280 IEC958_AES1_CON_ORIGINAL | IEC958_AES1_CON_PCM_CODER,
285 /* Allocate structures */
286 aout_sys_t *p_sys = malloc (sizeof (*p_sys));
287 if (unlikely(p_sys == NULL))
295 snd_output_stdio_attach( &p_sys->p_snd_stderr, stderr, 0 );
298 /* Open the device */
299 msg_Dbg( p_aout, "opening ALSA device `%s'", psz_device );
300 int val = snd_pcm_open (&p_sys->p_snd_pcm, psz_device,
301 SND_PCM_STREAM_PLAYBACK, mode);
302 #if (SND_LIB_VERSION <= 0x010015)
303 # warning Please update alsa-lib to version > 1.0.21a.
304 var_Create (p_aout->p_libvlc, "alsa-working", VLC_VAR_BOOL);
305 if (val != 0 && var_GetBool (p_aout->p_libvlc, "alsa-working"))
306 dialog_Fatal (p_aout, "ALSA version problem",
307 "VLC failed to re-initialize your audio output device.\n"
308 "Please update alsa-lib to version 1.0.22 or higher "
309 "to fix this issue.");
310 var_SetBool (p_aout->p_libvlc, "alsa-working", !val);
314 #if (SND_LIB_VERSION <= 0x010017)
315 # warning Please update alsa-lib to version > 1.0.23.
316 var_Create (p_aout->p_libvlc, "alsa-broken", VLC_VAR_BOOL);
317 if (!var_GetBool (p_aout->p_libvlc, "alsa-broken"))
319 var_SetBool (p_aout->p_libvlc, "alsa-broken", true);
320 dialog_Fatal (p_aout, "Potential ALSA version problem",
321 "VLC failed to initialize your audio output device (if any).\n"
322 "Please update alsa-lib to version 1.0.24 or higher "
323 "to try to fix this issue.");
326 msg_Err (p_aout, "cannot open ALSA device `%s' (%s)",
327 psz_device, snd_strerror (val));
328 dialog_Fatal (p_aout, _("Audio output failed"),
329 _("The audio device \"%s\" could not be used:\n%s."),
330 psz_device, snd_strerror (val));
337 snd_pcm_uframes_t i_buffer_size;
338 snd_pcm_uframes_t i_period_size;
343 fourcc = VLC_CODEC_SPDIFL;
344 i_buffer_size = ALSA_SPDIF_BUFFER_SIZE;
345 pcm_format = SND_PCM_FORMAT_S16;
348 i_period_size = ALSA_SPDIF_PERIOD_SIZE;
349 p_aout->format.i_bytes_per_frame = AOUT_SPDIF_SIZE;
350 p_aout->format.i_frame_length = A52_FRAME_NB;
352 aout_VolumeNoneInit( p_aout );
356 i_buffer_size = ALSA_DEFAULT_BUFFER_SIZE;
357 channels = aout_FormatNbChannels( &p_aout->format );
359 i_period_size = ALSA_DEFAULT_PERIOD_SIZE;
361 aout_VolumeSoftInit( p_aout );
364 p_aout->pf_play = Play;
365 p_aout->pf_pause = aout_PacketPause;
366 p_aout->pf_flush = aout_PacketFlush;
368 snd_pcm_hw_params_t *p_hw;
369 snd_pcm_sw_params_t *p_sw;
371 snd_pcm_hw_params_alloca(&p_hw);
372 snd_pcm_sw_params_alloca(&p_sw);
374 /* Get Initial hardware parameters */
375 val = snd_pcm_hw_params_any( p_sys->p_snd_pcm, p_hw );
378 msg_Err( p_aout, "unable to retrieve hardware parameters (%s)",
379 snd_strerror( val ) );
384 val = snd_pcm_hw_params_set_format (p_sys->p_snd_pcm, p_hw, pcm_format);
387 msg_Err (p_aout, "cannot set sample format: %s", snd_strerror (val));
391 val = snd_pcm_hw_params_set_access( p_sys->p_snd_pcm, p_hw,
392 SND_PCM_ACCESS_RW_INTERLEAVED );
395 msg_Err( p_aout, "unable to set interleaved stream format (%s)",
396 snd_strerror( val ) );
401 val = snd_pcm_hw_params_set_channels (p_sys->p_snd_pcm, p_hw, channels);
402 if (val < 0 && channels > 2) /* Fallback to stereo */
404 val = snd_pcm_hw_params_set_channels (p_sys->p_snd_pcm, p_hw, 2);
409 msg_Err( p_aout, "unable to set number of output channels (%s)",
410 snd_strerror( val ) );
415 unsigned rate = p_aout->format.i_rate;
416 val = snd_pcm_hw_params_set_rate_near (p_sys->p_snd_pcm, p_hw, &rate,
420 msg_Err (p_aout, "unable to set sampling rate (%s)",
424 if (p_aout->format.i_rate != rate)
425 msg_Warn (p_aout, "resampling from %d Hz to %d Hz",
426 p_aout->format.i_rate, rate);
428 /* Set period size. */
429 val = snd_pcm_hw_params_set_period_size_near( p_sys->p_snd_pcm, p_hw,
430 &i_period_size, NULL );
433 msg_Err( p_aout, "unable to set period size (%s)",
434 snd_strerror( val ) );
438 /* Set buffer size. */
439 val = snd_pcm_hw_params_set_buffer_size_near( p_sys->p_snd_pcm, p_hw,
443 msg_Err( p_aout, "unable to set buffer size (%s)",
444 snd_strerror( val ) );
448 /* Commit hardware parameters. */
449 val = snd_pcm_hw_params( p_sys->p_snd_pcm, p_hw );
452 msg_Err( p_aout, "unable to commit hardware configuration (%s)",
453 snd_strerror( val ) );
457 val = snd_pcm_hw_params_get_period_time( p_hw, &p_sys->i_period_time,
461 msg_Err( p_aout, "unable to get period time (%s)",
462 snd_strerror( val ) );
466 /* Get Initial software parameters */
467 snd_pcm_sw_params_current( p_sys->p_snd_pcm, p_sw );
469 snd_pcm_sw_params_set_avail_min( p_sys->p_snd_pcm, p_sw, i_period_size );
470 /* start playing when one period has been written */
471 val = snd_pcm_sw_params_set_start_threshold( p_sys->p_snd_pcm, p_sw,
472 ALSA_DEFAULT_PERIOD_SIZE);
475 msg_Err( p_aout, "unable to set start threshold (%s)",
476 snd_strerror( val ) );
480 /* Commit software parameters. */
481 if ( snd_pcm_sw_params( p_sys->p_snd_pcm, p_sw ) < 0 )
483 msg_Err( p_aout, "unable to set software configuration" );
488 snd_output_printf( p_sys->p_snd_stderr, "\nALSA hardware setup:\n\n" );
489 snd_pcm_dump_hw_setup( p_sys->p_snd_pcm, p_sys->p_snd_stderr );
490 snd_output_printf( p_sys->p_snd_stderr, "\nALSA software setup:\n\n" );
491 snd_pcm_dump_sw_setup( p_sys->p_snd_pcm, p_sys->p_snd_stderr );
492 snd_output_printf( p_sys->p_snd_stderr, "\n" );
495 p_sys->start_date = 0;
496 vlc_sem_init( &p_sys->wait, 0 );
497 aout_PacketInit (p_aout, &p_sys->packet, i_period_size);
499 /* Create ALSA thread and wait for its readiness. */
500 if( vlc_clone( &p_sys->thread, ALSAThread, p_aout,
501 VLC_THREAD_PRIORITY_OUTPUT ) )
503 msg_Err( p_aout, "cannot create ALSA thread (%m)" );
504 aout_PacketDestroy (p_aout);
505 vlc_sem_destroy( &p_sys->wait );
509 p_aout->format.i_format = fourcc;
510 p_aout->format.i_rate = rate;
512 p_aout->format.i_physical_channels = AOUT_CHAN_LEFT|AOUT_CHAN_RIGHT;
518 snd_pcm_close( p_sys->p_snd_pcm );
520 snd_output_close( p_sys->p_snd_stderr );
526 /*****************************************************************************
527 * Play: start playback
528 *****************************************************************************/
529 static void Play( audio_output_t *p_aout, block_t *block )
531 /* get the playing date of the first aout buffer */
532 p_aout->sys->start_date = block->i_pts;
534 aout_PacketPlay( p_aout, block );
535 p_aout->pf_play = aout_PacketPlay;
537 /* wake up the audio output thread */
538 sem_post( &p_aout->sys->wait );
541 /*****************************************************************************
542 * Close: close the ALSA device
543 *****************************************************************************/
544 static void Close (vlc_object_t *obj)
546 audio_output_t *p_aout = (audio_output_t *)obj;
547 struct aout_sys_t * p_sys = p_aout->sys;
549 /* Make sure that the thread will stop once it is waken up */
550 vlc_cancel( p_sys->thread );
551 vlc_join( p_sys->thread, NULL );
552 vlc_sem_destroy( &p_sys->wait );
553 aout_PacketDestroy (p_aout);
555 snd_pcm_drop( p_sys->p_snd_pcm );
556 snd_pcm_close( p_sys->p_snd_pcm );
558 snd_output_close( p_sys->p_snd_stderr );
563 /*****************************************************************************
564 * ALSAThread: asynchronous thread used to DMA the data to the device
565 *****************************************************************************/
566 static void* ALSAThread( void *data )
568 audio_output_t * p_aout = data;
569 struct aout_sys_t * p_sys = p_aout->sys;
571 /* Wait for the exact time to start playing (avoids resampling) */
572 vlc_sem_wait( &p_sys->wait );
573 mwait( p_sys->start_date - AOUT_MAX_PTS_ADVANCE / 4 );
574 #warning Should wait for buffer availability instead!
582 /*****************************************************************************
583 * ALSAFill: function used to fill the ALSA buffer as much as possible
584 *****************************************************************************/
585 static void ALSAFill( audio_output_t * p_aout )
587 struct aout_sys_t * p_sys = p_aout->sys;
588 snd_pcm_t *p_pcm = p_sys->p_snd_pcm;
589 snd_pcm_status_t * p_status;
593 int canc = vlc_savecancel();
594 /* Fill in the buffer until space or audio output buffer shortage */
597 snd_pcm_status_alloca(&p_status);
598 i_snd_rc = snd_pcm_status( p_pcm, p_status );
601 msg_Err( p_aout, "cannot get device status" );
605 /* Handle buffer underruns and get the status again */
606 if( snd_pcm_status_get_state( p_status ) == SND_PCM_STATE_XRUN )
608 /* Prepare the device */
609 i_snd_rc = snd_pcm_prepare( p_pcm );
612 msg_Err( p_aout, "cannot recover from buffer underrun" );
616 msg_Dbg( p_aout, "recovered from buffer underrun" );
618 /* Get the new status */
619 i_snd_rc = snd_pcm_status( p_pcm, p_status );
622 msg_Err( p_aout, "cannot get device status after recovery" );
626 /* Underrun, try to recover as quickly as possible */
631 /* Here the device should be in RUNNING state, p_status is valid. */
632 snd_pcm_sframes_t delay = snd_pcm_status_get_delay( p_status );
633 if( delay == 0 ) /* workaround buggy alsa drivers */
634 if( snd_pcm_delay( p_pcm, &delay ) < 0 )
635 delay = 0; /* FIXME: use a positive minimal delay */
637 size_t i_bytes = snd_pcm_frames_to_bytes( p_pcm, delay );
638 mtime_t delay_us = CLOCK_FREQ * i_bytes
639 / p_aout->format.i_bytes_per_frame
640 / p_aout->format.i_rate
641 * p_aout->format.i_frame_length;
644 snd_pcm_state_t state = snd_pcm_status_get_state( p_status );
645 if( state != SND_PCM_STATE_RUNNING )
646 msg_Err( p_aout, "pcm status (%d) != RUNNING", state );
648 msg_Dbg( p_aout, "Delay is %ld frames (%zu bytes)", delay, i_bytes );
650 msg_Dbg( p_aout, "Bytes per frame: %d", p_aout->format.i_bytes_per_frame );
651 msg_Dbg( p_aout, "Rate: %d", p_aout->format.i_rate );
652 msg_Dbg( p_aout, "Frame length: %d", p_aout->format.i_frame_length );
653 msg_Dbg( p_aout, "Next date: in %"PRId64" microseconds", delay_us );
655 next_date = mdate() + delay_us;
658 block_t *p_buffer = aout_OutputNextBuffer( p_aout, next_date,
659 (p_aout->format.i_format == VLC_CODEC_SPDIFL) );
661 /* Audio output buffer shortage -> stop the fill process and wait */
662 if( p_buffer == NULL )
665 block_cleanup_push( p_buffer );
668 int n = snd_pcm_poll_descriptors_count(p_pcm);
669 struct pollfd ufd[n];
670 unsigned short revents;
672 snd_pcm_poll_descriptors(p_pcm, ufd, n);
675 vlc_restorecancel(canc);
677 canc = vlc_savecancel();
678 snd_pcm_poll_descriptors_revents(p_pcm, ufd, n, &revents);
682 if(revents & POLLOUT)
684 i_snd_rc = snd_pcm_writei( p_pcm, p_buffer->p_buffer,
685 p_buffer->i_nb_samples );
686 if( i_snd_rc != -ESTRPIPE )
690 /* a suspend event occurred
691 * (stream is suspended and waiting for an application recovery) */
692 msg_Dbg( p_aout, "entering in suspend mode, trying to resume..." );
694 while( ( i_snd_rc = snd_pcm_resume( p_pcm ) ) == -EAGAIN )
696 vlc_restorecancel(canc);
697 msleep(CLOCK_FREQ); /* device still suspended, wait... */
698 canc = vlc_savecancel();
702 /* Device does not support resuming, restart it */
703 i_snd_rc = snd_pcm_prepare( p_pcm );
708 msg_Err( p_aout, "cannot write: %s", snd_strerror( i_snd_rc ) );
710 vlc_restorecancel(canc);
716 msg_Err( p_aout, "ALSA error: %s", snd_strerror( i_snd_rc ) );
718 vlc_restorecancel(canc);
719 msleep(p_sys->i_period_time / 2);
722 /*****************************************************************************
723 * config variable callback
724 *****************************************************************************/
725 static int FindDevicesCallback( vlc_object_t *p_this, char const *psz_name,
726 vlc_value_t newval, vlc_value_t oldval, void *p_unused )
728 module_config_t *p_item;
733 p_item = config_FindConfig( p_this, psz_name );
734 if( !p_item ) return VLC_SUCCESS;
736 /* Clear-up the current list */
741 /* Keep the first entrie */
742 for( i = 1; i < p_item->i_list; i++ )
744 free( (char *)p_item->ppsz_list[i] );
745 free( (char *)p_item->ppsz_list_text[i] );
747 /* TODO: Remove when no more needed */
748 p_item->ppsz_list[i] = NULL;
749 p_item->ppsz_list_text[i] = NULL;
753 GetDevices( p_this, p_item );
755 /* Signal change to the interface */
756 p_item->b_dirty = true;
762 static void GetDevices (vlc_object_t *obj, module_config_t *item)
766 msg_Dbg(obj, "Available ALSA PCM devices:");
768 if (snd_device_name_hint(-1, "pcm", &hints) < 0)
771 for (size_t i = 0; hints[i] != NULL; i++)
773 void *hint = hints[i];
776 char *name = snd_device_name_get_hint(hint, "NAME");
777 if (unlikely(name == NULL))
779 if (unlikely(asprintf (&dev, "plug:'%s'", name) == -1))
785 char *desc = snd_device_name_get_hint(hint, "DESC");
787 for (char *lf = strchr(desc, '\n'); lf; lf = strchr(lf, '\n'))
789 msg_Dbg(obj, "%s (%s)", (desc != NULL) ? desc : name, name);
793 item->ppsz_list = xrealloc(item->ppsz_list,
794 (item->i_list + 2) * sizeof(char *));
795 item->ppsz_list_text = xrealloc(item->ppsz_list_text,
796 (item->i_list + 2) * sizeof(char *));
797 item->ppsz_list[item->i_list] = dev;
800 item->ppsz_list_text[item->i_list] = desc;
805 vlc_value_t val, text;
807 val.psz_string = dev;
808 text.psz_string = desc;
809 var_Change(obj, "audio-device", VLC_VAR_ADDCHOICE, &val, &text);
816 snd_device_name_free_hint(hints);
820 item->ppsz_list[item->i_list] = NULL;
821 item->ppsz_list_text[item->i_list] = NULL;