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vlc/modules/audio_output/directx.c

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/*****************************************************************************
* directx.c: Windows DirectX audio output method
*****************************************************************************
* Copyright (C) 2001-2009 the VideoLAN team
* $Id$
*
* Authors: Gildas Bazin <gbazin@videolan.org>
*
* This program is free software; you can redistribute it and/or modify
* 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
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
*****************************************************************************/
/*****************************************************************************
* Preamble
*****************************************************************************/
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#include <vlc_common.h>
#include <vlc_plugin.h>
#include <vlc_aout.h>
#include <vlc_charset.h>
#include "windows_audio_common.h"
#include <dsound.h>
#define FRAME_SIZE ((int)p_aout->output.output.i_rate/20) /* Size in samples */
/*****************************************************************************
* notification_thread_t: DirectX event thread
*****************************************************************************/
typedef struct notification_thread_t
{
VLC_COMMON_MEMBERS
aout_instance_t *p_aout;
int i_frame_size; /* size in bytes of one frame */
int i_write_slot; /* current write position in our circular buffer */
mtime_t start_date;
HANDLE event;
} notification_thread_t;
/*****************************************************************************
* aout_sys_t: directx audio output method descriptor
*****************************************************************************
* This structure is part of the audio output thread descriptor.
* It describes the direct sound specific properties of an audio device.
*****************************************************************************/
struct aout_sys_t
{
HINSTANCE hdsound_dll; /* handle of the opened dsound dll */
char * psz_device; /* user defined device name */
LPGUID p_device_guid;
LPDIRECTSOUND p_dsobject; /* main Direct Sound object */
LPDIRECTSOUNDBUFFER p_dsbuffer; /* the sound buffer we use (direct sound
* takes care of mixing all the
* secondary buffers into the primary) */
notification_thread_t *p_notif; /* DirectSoundThread id */
int b_playing; /* playing status */
int i_frame_size; /* Size in bytes of one frame */
int i_speaker_setup; /* Speaker setup override */
bool b_chan_reorder; /* do we need channel reordering */
int pi_chan_table[AOUT_CHAN_MAX];
uint32_t i_channel_mask;
uint32_t i_bits_per_sample;
uint32_t i_channels;
};
/*****************************************************************************
* Local prototypes.
*****************************************************************************/
static int OpenAudio ( vlc_object_t * );
static void CloseAudio ( vlc_object_t * );
static void Play ( aout_instance_t * );
/* local functions */
static void Probe ( aout_instance_t * );
static int InitDirectSound ( aout_instance_t * );
static int CreateDSBuffer ( aout_instance_t *, int, int, int, int, int, bool );
static int CreateDSBufferPCM ( aout_instance_t *, vlc_fourcc_t*, int, int, int, bool );
static void DestroyDSBuffer ( aout_instance_t * );
static void* DirectSoundThread( vlc_object_t * );
static int FillBuffer ( aout_instance_t *, int, aout_buffer_t * );
static int ReloadDirectXDevices( vlc_object_t *, char const *,
vlc_value_t, vlc_value_t, void * );
/* Speaker setup override options list */
static const char *const speaker_list[] = { "Windows default", "Mono", "Stereo",
"Quad", "5.1", "7.1" };
static const char *const ppsz_adev[] = {"default", };
static const char *const ppsz_adev_text[] = {"default", };
/*****************************************************************************
* Module descriptor
*****************************************************************************/
#define DEVICE_TEXT N_("Output device")
#define DEVICE_LONGTEXT N_("Select your audio output device")
#define SPEAKER_TEXT N_("Speaker configuration")
#define SPEAKER_LONGTEXT N_("Select speaker configuration you want to use. " \
"This option doesn't upmix! So NO e.g. Stereo -> 5.1 conversion." )
vlc_module_begin ()
set_description( N_("DirectX audio output") )
set_shortname( "DirectX" )
set_capability( "audio output", 100 )
set_category( CAT_AUDIO )
set_subcategory( SUBCAT_AUDIO_AOUT )
add_shortcut( "directx" )
add_shortcut( "directsound" )
add_string( "directx-audio-device-name", "default", NULL,
DEVICE_TEXT, DEVICE_LONGTEXT, false )
add_deprecated_alias( "directx-audio-device" ) /* Since 1.1.0 */
change_string_list( ppsz_adev, ppsz_adev_text, ReloadDirectXDevices )
change_action_add( ReloadDirectXDevices, N_("Refresh list") )
change_need_restart ()
add_bool( "directx-audio-float32", false, NULL, FLOAT_TEXT,
FLOAT_LONGTEXT, true )
add_string( "directx-audio-speaker", "Windows default", NULL,
SPEAKER_TEXT, SPEAKER_LONGTEXT, true )
change_string_list( speaker_list, 0, 0 )
change_need_restart ()
set_callbacks( OpenAudio, CloseAudio )
vlc_module_end ()
/*****************************************************************************
* OpenAudio: open the audio device
*****************************************************************************
* This function opens and setups Direct Sound.
*****************************************************************************/
static int OpenAudio( vlc_object_t *p_this )
{
aout_instance_t * p_aout = (aout_instance_t *)p_this;
vlc_value_t val;
char * psz_speaker;
int i = 0;
const char * const * ppsz_compare = speaker_list;
msg_Dbg( p_aout, "Opening DirectSound Audio Output" );
/* Allocate structure */
p_aout->output.p_sys = malloc( sizeof( aout_sys_t ) );
if( p_aout->output.p_sys == NULL )
return VLC_ENOMEM;
/* Initialize some variables */
p_aout->output.p_sys->p_dsobject = NULL;
p_aout->output.p_sys->p_dsbuffer = NULL;
p_aout->output.p_sys->p_notif = NULL;
p_aout->output.p_sys->b_playing = 0;
p_aout->output.pf_play = Play;
aout_VolumeSoftInit( p_aout );
/* Retrieve config values */
var_Create( p_aout, "directx-audio-float32",
VLC_VAR_BOOL | VLC_VAR_DOINHERIT );
psz_speaker = var_CreateGetString( p_aout, "directx-audio-speaker" );
while ( *ppsz_compare != NULL )
{
if ( !strncmp( *ppsz_compare, psz_speaker, strlen(*ppsz_compare) ) )
{
break;
}
ppsz_compare++; i++;
}
if ( *ppsz_compare == NULL )
{
msg_Err( p_aout, "(%s) isn't valid speaker setup option", psz_speaker );
msg_Err( p_aout, "Defaulting to Windows default speaker config");
i = 0;
}
free( psz_speaker );
p_aout->output.p_sys->i_speaker_setup = i;
p_aout->output.p_sys->p_device_guid = 0;
/* Initialise DirectSound */
if( InitDirectSound( p_aout ) )
{
msg_Err( p_aout, "cannot initialize DirectSound" );
goto error;
}
if( var_Type( p_aout, "audio-device" ) == 0 )
{
Probe( p_aout );
}
if( var_Get( p_aout, "audio-device", &val ) < 0 )
{
/* Probe() has failed. */
goto error;
}
/* Open the device */
if( val.i_int == AOUT_VAR_SPDIF )
{
p_aout->output.output.i_format = VLC_CODEC_SPDIFL;
/* Calculate the frame size in bytes */
p_aout->output.i_nb_samples = A52_FRAME_NB;
p_aout->output.output.i_bytes_per_frame = AOUT_SPDIF_SIZE;
p_aout->output.output.i_frame_length = A52_FRAME_NB;
p_aout->output.p_sys->i_frame_size =
p_aout->output.output.i_bytes_per_frame;
if( CreateDSBuffer( p_aout, VLC_CODEC_SPDIFL,
p_aout->output.output.i_physical_channels,
aout_FormatNbChannels( &p_aout->output.output ),
p_aout->output.output.i_rate,
p_aout->output.p_sys->i_frame_size, false )
!= VLC_SUCCESS )
{
msg_Err( p_aout, "cannot open directx audio device" );
free( p_aout->output.p_sys );
return VLC_EGENERIC;
}
aout_VolumeNoneInit( p_aout );
}
else
{
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;
}
else if( val.i_int == AOUT_VAR_7_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_MIDDLELEFT | AOUT_CHAN_MIDDLERIGHT
| AOUT_CHAN_LFE;
}
else if( val.i_int == AOUT_VAR_3F2R )
{
p_aout->output.output.i_physical_channels
= AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT | AOUT_CHAN_CENTER
| AOUT_CHAN_REARLEFT | AOUT_CHAN_REARRIGHT;
}
else if( val.i_int == AOUT_VAR_2F2R )
{
p_aout->output.output.i_physical_channels
= AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT
| AOUT_CHAN_REARLEFT | AOUT_CHAN_REARRIGHT;
}
else if( val.i_int == AOUT_VAR_MONO )
{
p_aout->output.output.i_physical_channels = AOUT_CHAN_CENTER;
}
else
{
p_aout->output.output.i_physical_channels
= AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT;
}
if( CreateDSBufferPCM( p_aout, &p_aout->output.output.i_format,
p_aout->output.output.i_physical_channels,
aout_FormatNbChannels( &p_aout->output.output ),
p_aout->output.output.i_rate, false )
!= VLC_SUCCESS )
{
msg_Err( p_aout, "cannot open directx audio device" );
free( p_aout->output.p_sys );
return VLC_EGENERIC;
}
/* Calculate the frame size in bytes */
p_aout->output.i_nb_samples = FRAME_SIZE;
aout_FormatPrepare( &p_aout->output.output );
aout_VolumeSoftInit( p_aout );
}
/* Now we need to setup our DirectSound play notification structure */
p_aout->output.p_sys->p_notif =
vlc_object_create( p_aout, sizeof(notification_thread_t) );
p_aout->output.p_sys->p_notif->p_aout = p_aout;
p_aout->output.p_sys->p_notif->event = CreateEvent( 0, FALSE, FALSE, 0 );
p_aout->output.p_sys->p_notif->i_frame_size =
p_aout->output.p_sys->i_frame_size;
/* then launch the notification thread */
msg_Dbg( p_aout, "creating DirectSoundThread" );
if( vlc_thread_create( p_aout->output.p_sys->p_notif,
"DirectSound Notification Thread",
DirectSoundThread,
VLC_THREAD_PRIORITY_HIGHEST ) )
{
msg_Err( p_aout, "cannot create DirectSoundThread" );
CloseHandle( p_aout->output.p_sys->p_notif->event );
vlc_object_release( p_aout->output.p_sys->p_notif );
p_aout->output.p_sys->p_notif = NULL;
goto error;
}
vlc_object_attach( p_aout->output.p_sys->p_notif, p_aout );
return VLC_SUCCESS;
error:
CloseAudio( VLC_OBJECT(p_aout) );
return VLC_EGENERIC;
}
/*****************************************************************************
* Probe: probe the audio device for available formats and channels
*****************************************************************************/
static void Probe( aout_instance_t * p_aout )
{
vlc_value_t val, text;
vlc_fourcc_t i_format;
unsigned int i_physical_channels;
DWORD ui_speaker_config;
bool is_default_output_set = false;
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 );
/* Test for 5.1 support */
i_physical_channels = AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT |
AOUT_CHAN_CENTER | AOUT_CHAN_REARLEFT |
AOUT_CHAN_REARRIGHT | AOUT_CHAN_LFE;
if( p_aout->output.output.i_physical_channels == i_physical_channels )
{
if( CreateDSBufferPCM( p_aout, &i_format, i_physical_channels, 6,
p_aout->output.output.i_rate, true )
== VLC_SUCCESS )
{
val.i_int = AOUT_VAR_5_1;
text.psz_string = (char*) "5.1";
var_Change( p_aout, "audio-device",
VLC_VAR_ADDCHOICE, &val, &text );
var_Change( p_aout, "audio-device", VLC_VAR_SETDEFAULT, &val, NULL );
is_default_output_set = true;
msg_Dbg( p_aout, "device supports 5.1 channels" );
}
}
/* Test for 7.1 support */
i_physical_channels = AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT |
AOUT_CHAN_CENTER | AOUT_CHAN_REARLEFT |
AOUT_CHAN_MIDDLELEFT | AOUT_CHAN_MIDDLERIGHT |
AOUT_CHAN_REARRIGHT | AOUT_CHAN_LFE;
if( p_aout->output.output.i_physical_channels == i_physical_channels )
{
if( CreateDSBufferPCM( p_aout, &i_format, i_physical_channels, 8,
p_aout->output.output.i_rate, true )
== VLC_SUCCESS )
{
val.i_int = AOUT_VAR_7_1;
text.psz_string = (char*) "7.1";
var_Change( p_aout, "audio-device",
VLC_VAR_ADDCHOICE, &val, &text );
var_Change( p_aout, "audio-device", VLC_VAR_SETDEFAULT, &val, NULL );
is_default_output_set = true;
msg_Dbg( p_aout, "device supports 7.1 channels" );
}
}
/* Test for 3 Front 2 Rear support */
i_physical_channels = AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT |
AOUT_CHAN_CENTER | AOUT_CHAN_REARLEFT |
AOUT_CHAN_REARRIGHT;
if( p_aout->output.output.i_physical_channels == i_physical_channels )
{
if( CreateDSBufferPCM( p_aout, &i_format, i_physical_channels, 5,
p_aout->output.output.i_rate, true )
== VLC_SUCCESS )
{
val.i_int = AOUT_VAR_3F2R;
text.psz_string = _("3 Front 2 Rear");
var_Change( p_aout, "audio-device",
VLC_VAR_ADDCHOICE, &val, &text );
if(!is_default_output_set)
{
var_Change( p_aout, "audio-device", VLC_VAR_SETDEFAULT, &val, NULL );
is_default_output_set = true;
}
msg_Dbg( p_aout, "device supports 5 channels" );
}
}
/* Test for 2 Front 2 Rear support */
i_physical_channels = AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT |
AOUT_CHAN_REARLEFT | AOUT_CHAN_REARRIGHT;
if( ( p_aout->output.output.i_physical_channels & i_physical_channels )
== i_physical_channels )
{
if( CreateDSBufferPCM( p_aout, &i_format, i_physical_channels, 4,
p_aout->output.output.i_rate, true )
== VLC_SUCCESS )
{
val.i_int = AOUT_VAR_2F2R;
text.psz_string = _("2 Front 2 Rear");
var_Change( p_aout, "audio-device",
VLC_VAR_ADDCHOICE, &val, &text );
if(!is_default_output_set)
{
var_Change( p_aout, "audio-device", VLC_VAR_SETDEFAULT, &val, NULL );
is_default_output_set = true;
}
msg_Dbg( p_aout, "device supports 4 channels" );
}
}
/* Test for stereo support */
i_physical_channels = AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT;
if( CreateDSBufferPCM( p_aout, &i_format, i_physical_channels, 2,
p_aout->output.output.i_rate, true )
== VLC_SUCCESS )
{
val.i_int = AOUT_VAR_STEREO;
text.psz_string = _("Stereo");
var_Change( p_aout, "audio-device", VLC_VAR_ADDCHOICE, &val, &text );
if(!is_default_output_set)
{
var_Change( p_aout, "audio-device", VLC_VAR_SETDEFAULT, &val, NULL );
is_default_output_set = true;
msg_Dbg( p_aout, "device supports 2 channels (DEFAULT!)" );
}
else msg_Dbg( p_aout, "device supports 2 channels" );
}
/* Test for mono support */
i_physical_channels = AOUT_CHAN_CENTER;
if( CreateDSBufferPCM( p_aout, &i_format, i_physical_channels, 1,
p_aout->output.output.i_rate, true )
== VLC_SUCCESS )
{
val.i_int = AOUT_VAR_MONO;
text.psz_string = _("Mono");
var_Change( p_aout, "audio-device", VLC_VAR_ADDCHOICE, &val, &text );
msg_Dbg( p_aout, "device supports 1 channel" );
}
/* Check the speaker configuration to determine which channel config should
* be the default */
if FAILED( IDirectSound_GetSpeakerConfig( p_aout->output.p_sys->p_dsobject,
&ui_speaker_config ) )
{
ui_speaker_config = DSSPEAKER_STEREO;
msg_Dbg( p_aout, "GetSpeakerConfig failed" );
}
switch( DSSPEAKER_CONFIG(ui_speaker_config) )
{
case DSSPEAKER_7POINT1:
msg_Dbg( p_aout, "Windows says your SpeakerConfig is 7.1" );
val.i_int = AOUT_VAR_7_1;
break;
case DSSPEAKER_5POINT1:
msg_Dbg( p_aout, "Windows says your SpeakerConfig is 5.1" );
val.i_int = AOUT_VAR_5_1;
break;
case DSSPEAKER_QUAD:
msg_Dbg( p_aout, "Windows says your SpeakerConfig is Quad" );
val.i_int = AOUT_VAR_2F2R;
break;
#if 0 /* Lots of people just get their settings wrong and complain that
* this is a problem with VLC so just don't ever set mono by default. */
case DSSPEAKER_MONO:
val.i_int = AOUT_VAR_MONO;
break;
#endif
case DSSPEAKER_SURROUND:
msg_Dbg( p_aout, "Windows says your SpeakerConfig is surround" );
case DSSPEAKER_STEREO:
msg_Dbg( p_aout, "Windows says your SpeakerConfig is stereo" );
default:
/* If nothing else is found, choose stereo output */
val.i_int = AOUT_VAR_STEREO;
break;
}
/* Check if we want to override speaker config */
switch( p_aout->output.p_sys->i_speaker_setup )
{
case 0: /* Default value aka Windows default speaker setup */
break;
case 1: /* Mono */
msg_Dbg( p_aout, "SpeakerConfig is forced to Mono" );
val.i_int = AOUT_VAR_MONO;
break;
case 2: /* Stereo */
msg_Dbg( p_aout, "SpeakerConfig is forced to Stereo" );
val.i_int = AOUT_VAR_STEREO;
break;
case 3: /* Quad */
msg_Dbg( p_aout, "SpeakerConfig is forced to Quad" );
val.i_int = AOUT_VAR_2F2R;
break;
case 4: /* 5.1 */
msg_Dbg( p_aout, "SpeakerConfig is forced to 5.1" );
val.i_int = AOUT_VAR_5_1;
break;
case 5: /* 7.1 */
msg_Dbg( p_aout, "SpeakerConfig is forced to 7.1" );
val.i_int = AOUT_VAR_7_1;
break;
default:
msg_Dbg( p_aout, "SpeakerConfig is forced to non-existing value" );
break;
}
var_Set( p_aout, "audio-device", val );
/* Test for SPDIF support */
if ( AOUT_FMT_NON_LINEAR( &p_aout->output.output ) )
{
if( CreateDSBuffer( p_aout, VLC_CODEC_SPDIFL,
p_aout->output.output.i_physical_channels,
aout_FormatNbChannels( &p_aout->output.output ),
p_aout->output.output.i_rate,
AOUT_SPDIF_SIZE, true )
== VLC_SUCCESS )
{
msg_Dbg( p_aout, "device supports A/52 over S/PDIF" );
val.i_int = AOUT_VAR_SPDIF;
text.psz_string = _("A/52 over S/PDIF");
var_Change( p_aout, "audio-device",
VLC_VAR_ADDCHOICE, &val, &text );
if( var_InheritInteger( p_aout, "spdif" ) )
var_Set( p_aout, "audio-device", val );
}
}
var_Change( p_aout, "audio-device", VLC_VAR_CHOICESCOUNT, &val, NULL );
if( val.i_int <= 0 )
{
/* Probe() has failed. */
var_Destroy( p_aout, "audio-device" );
return;
}
var_AddCallback( p_aout, "audio-device", aout_ChannelsRestart, NULL );
var_SetBool( p_aout, "intf-change", true );
}
/*****************************************************************************
* Play: we'll start playing the directsound buffer here because at least here
* we know the first buffer has been put in the aout fifo and we also
* know its date.
*****************************************************************************/
static void Play( aout_instance_t *p_aout )
{
if( !p_aout->output.p_sys->b_playing )
{
aout_buffer_t *p_buffer;
p_aout->output.p_sys->b_playing = 1;
/* get the playing date of the first aout buffer */
p_aout->output.p_sys->p_notif->start_date =
aout_FifoFirstDate( p_aout, &p_aout->output.fifo );
/* fill in the first samples */
for( int i = 0; i < FRAMES_NUM; i++ )
{
p_buffer = aout_FifoPop( p_aout, &p_aout->output.fifo );
if( !p_buffer ) break;
FillBuffer( p_aout, i, p_buffer );
}
/* wake up the audio output thread */
SetEvent( p_aout->output.p_sys->p_notif->event );
}
}
/*****************************************************************************
* CloseAudio: close the audio device
*****************************************************************************/
static void CloseAudio( vlc_object_t *p_this )
{
aout_instance_t * p_aout = (aout_instance_t *)p_this;
aout_sys_t *p_sys = p_aout->output.p_sys;
msg_Dbg( p_aout, "closing audio device" );
/* kill the position notification thread, if any */
if( p_sys->p_notif )
{
vlc_object_kill( p_sys->p_notif );
/* wake up the audio thread if needed */
if( !p_sys->b_playing ) SetEvent( p_sys->p_notif->event );
vlc_thread_join( p_sys->p_notif );
vlc_object_release( p_sys->p_notif );
}
/* release the secondary buffer */
DestroyDSBuffer( p_aout );
/* finally release the DirectSound object */
if( p_sys->p_dsobject ) IDirectSound_Release( p_sys->p_dsobject );
/* free DSOUND.DLL */
if( p_sys->hdsound_dll ) FreeLibrary( p_sys->hdsound_dll );
free( p_aout->output.p_sys->p_device_guid );
free( p_sys );
}
/*****************************************************************************
* CallBackDirectSoundEnum: callback to enumerate available devices
*****************************************************************************/
static int CALLBACK CallBackDirectSoundEnum( LPGUID p_guid, LPCWSTR psz_desc,
LPCWSTR psz_mod, LPVOID _p_aout )
{
VLC_UNUSED( psz_mod );
aout_instance_t *p_aout = (aout_instance_t *)_p_aout;
char *psz_device = FromWide( psz_desc );
msg_Dbg( p_aout, "found device: %s", psz_device );
if( p_aout->output.p_sys->psz_device &&
!strcmp(p_aout->output.p_sys->psz_device, psz_device) && p_guid )
{
/* Use the device corresponding to psz_device */
p_aout->output.p_sys->p_device_guid = malloc( sizeof( GUID ) );
*p_aout->output.p_sys->p_device_guid = *p_guid;
msg_Dbg( p_aout, "using device: %s", psz_device );
}
else
{
/* If no default device has been selected, chose the first one */
if( !p_aout->output.p_sys->psz_device && p_guid )
{
p_aout->output.p_sys->psz_device = strdup( psz_device );
p_aout->output.p_sys->p_device_guid = malloc( sizeof( GUID ) );
*p_aout->output.p_sys->p_device_guid = *p_guid;
msg_Dbg( p_aout, "using device: %s", psz_device );
}
}
free( psz_device );
return true;
}
/*****************************************************************************
* InitDirectSound: handle all the gory details of DirectSound initialisation
*****************************************************************************/
static int InitDirectSound( aout_instance_t *p_aout )
{
HRESULT (WINAPI *OurDirectSoundCreate)(LPGUID, LPDIRECTSOUND *, LPUNKNOWN);
HRESULT (WINAPI *OurDirectSoundEnumerate)(LPDSENUMCALLBACKW, LPVOID);
p_aout->output.p_sys->hdsound_dll = LoadLibrary("DSOUND.DLL");
if( p_aout->output.p_sys->hdsound_dll == NULL )
{
msg_Warn( p_aout, "cannot open DSOUND.DLL" );
goto error;
}
OurDirectSoundCreate = (void *)
GetProcAddress( p_aout->output.p_sys->hdsound_dll,
"DirectSoundCreate" );
if( OurDirectSoundCreate == NULL )
{
msg_Warn( p_aout, "GetProcAddress FAILED" );
goto error;
}
/* Get DirectSoundEnumerate */
OurDirectSoundEnumerate = (void *)
GetProcAddress( p_aout->output.p_sys->hdsound_dll,
"DirectSoundEnumerateW" );
if( OurDirectSoundEnumerate )
{
p_aout->output.p_sys->psz_device = var_InheritString(p_aout, "directx-audio-device-name");
/* Attempt enumeration */
if( FAILED( OurDirectSoundEnumerate( CallBackDirectSoundEnum,
p_aout ) ) )
{
msg_Dbg( p_aout, "enumeration of DirectSound devices failed" );
}
}
/* Create the direct sound object */
if FAILED( OurDirectSoundCreate( p_aout->output.p_sys->p_device_guid,
&p_aout->output.p_sys->p_dsobject,
NULL ) )
{
msg_Warn( p_aout, "cannot create a direct sound device" );
goto error;
}
/* Set DirectSound Cooperative level, ie what control we want over Windows
* sound device. In our case, DSSCL_EXCLUSIVE means that we can modify the
* settings of the primary buffer, but also that only the sound of our
* application will be hearable when it will have the focus.
* !!! (this is not really working as intended yet because to set the
* cooperative level you need the window handle of your application, and
* I don't know of any easy way to get it. Especially since we might play
* sound without any video, and so what window handle should we use ???
* The hack for now is to use the Desktop window handle - it seems to be
* working */
if( IDirectSound_SetCooperativeLevel( p_aout->output.p_sys->p_dsobject,
GetDesktopWindow(),
DSSCL_EXCLUSIVE) )
{
msg_Warn( p_aout, "cannot set direct sound cooperative level" );
}
return VLC_SUCCESS;
error:
p_aout->output.p_sys->p_dsobject = NULL;
if( p_aout->output.p_sys->hdsound_dll )
{
FreeLibrary( p_aout->output.p_sys->hdsound_dll );
p_aout->output.p_sys->hdsound_dll = NULL;
}
return VLC_EGENERIC;
}
/*****************************************************************************
* CreateDSBuffer: Creates a direct sound buffer of the required format.
*****************************************************************************
* This function creates the buffer we'll use to play audio.
* In DirectSound there are two kinds of buffers:
* - the primary buffer: which is the actual buffer that the soundcard plays
* - the secondary buffer(s): these buffers are the one actually used by
* applications and DirectSound takes care of mixing them into the primary.
*
* Once you create a secondary buffer, you cannot change its format anymore so
* you have to release the current one and create another.
*****************************************************************************/
static int CreateDSBuffer( aout_instance_t *p_aout, int i_format,
int i_channels, int i_nb_channels, int i_rate,
int i_bytes_per_frame, bool b_probe )
{
WAVEFORMATEXTENSIBLE waveformat;
DSBUFFERDESC dsbdesc;
unsigned int i;
/* First set the sound buffer format */
waveformat.dwChannelMask = 0;
for( i = 0; i < sizeof(pi_channels_src)/sizeof(uint32_t); i++ )
{
if( i_channels & pi_channels_src[i] )
waveformat.dwChannelMask |= pi_channels_in[i];
}
switch( i_format )
{
case VLC_CODEC_SPDIFL:
i_nb_channels = 2;
/* To prevent channel re-ordering */
waveformat.dwChannelMask = SPEAKER_FRONT_LEFT | SPEAKER_FRONT_RIGHT;
waveformat.Format.wBitsPerSample = 16;
waveformat.Samples.wValidBitsPerSample =
waveformat.Format.wBitsPerSample;
waveformat.Format.wFormatTag = WAVE_FORMAT_DOLBY_AC3_SPDIF;
waveformat.SubFormat = _KSDATAFORMAT_SUBTYPE_DOLBY_AC3_SPDIF;
break;
case VLC_CODEC_FL32:
waveformat.Format.wBitsPerSample = sizeof(float) * 8;
waveformat.Samples.wValidBitsPerSample =
waveformat.Format.wBitsPerSample;
waveformat.Format.wFormatTag = WAVE_FORMAT_IEEE_FLOAT;
waveformat.SubFormat = _KSDATAFORMAT_SUBTYPE_IEEE_FLOAT;
break;
case VLC_CODEC_S16L:
waveformat.Format.wBitsPerSample = 16;
waveformat.Samples.wValidBitsPerSample =
waveformat.Format.wBitsPerSample;
waveformat.Format.wFormatTag = WAVE_FORMAT_PCM;
waveformat.SubFormat = _KSDATAFORMAT_SUBTYPE_PCM;
break;
}
waveformat.Format.nChannels = i_nb_channels;
waveformat.Format.nSamplesPerSec = i_rate;
waveformat.Format.nBlockAlign =
waveformat.Format.wBitsPerSample / 8 * i_nb_channels;
waveformat.Format.nAvgBytesPerSec =
waveformat.Format.nSamplesPerSec * waveformat.Format.nBlockAlign;
p_aout->output.p_sys->i_bits_per_sample = waveformat.Format.wBitsPerSample;
p_aout->output.p_sys->i_channels = i_nb_channels;
/* Then fill in the direct sound descriptor */
memset(&dsbdesc, 0, sizeof(DSBUFFERDESC));
dsbdesc.dwSize = sizeof(DSBUFFERDESC);
dsbdesc.dwFlags = DSBCAPS_GETCURRENTPOSITION2/* Better position accuracy */
| DSBCAPS_GLOBALFOCUS; /* Allows background playing */
/* Only use the new WAVE_FORMAT_EXTENSIBLE format for multichannel audio */
if( i_nb_channels <= 2 )
{
waveformat.Format.cbSize = 0;
}
else
{
waveformat.Format.wFormatTag = WAVE_FORMAT_EXTENSIBLE;
waveformat.Format.cbSize =
sizeof(WAVEFORMATEXTENSIBLE) - sizeof(WAVEFORMATEX);
/* Needed for 5.1 on emu101k */
dsbdesc.dwFlags |= DSBCAPS_LOCHARDWARE;
}
dsbdesc.dwBufferBytes = FRAMES_NUM * i_bytes_per_frame; /* buffer size */
dsbdesc.lpwfxFormat = (WAVEFORMATEX *)&waveformat;
if FAILED( IDirectSound_CreateSoundBuffer(
p_aout->output.p_sys->p_dsobject, &dsbdesc,
&p_aout->output.p_sys->p_dsbuffer, NULL) )
{
if( dsbdesc.dwFlags & DSBCAPS_LOCHARDWARE )
{
/* Try without DSBCAPS_LOCHARDWARE */
dsbdesc.dwFlags &= ~DSBCAPS_LOCHARDWARE;
if FAILED( IDirectSound_CreateSoundBuffer(
p_aout->output.p_sys->p_dsobject, &dsbdesc,
&p_aout->output.p_sys->p_dsbuffer, NULL) )
{
return VLC_EGENERIC;
}
if( !b_probe )
msg_Dbg( p_aout, "couldn't use hardware sound buffer" );
}
else
{
return VLC_EGENERIC;
}
}
/* Stop here if we were just probing */
if( b_probe )
{
IDirectSoundBuffer_Release( p_aout->output.p_sys->p_dsbuffer );
p_aout->output.p_sys->p_dsbuffer = NULL;
return VLC_SUCCESS;
}
p_aout->output.p_sys->i_frame_size = i_bytes_per_frame;
p_aout->output.p_sys->i_channel_mask = waveformat.dwChannelMask;
p_aout->output.p_sys->b_chan_reorder =
aout_CheckChannelReorder( pi_channels_in, pi_channels_out,
waveformat.dwChannelMask, i_nb_channels,
p_aout->output.p_sys->pi_chan_table );
if( p_aout->output.p_sys->b_chan_reorder )
{
msg_Dbg( p_aout, "channel reordering needed" );
}
return VLC_SUCCESS;
}
/*****************************************************************************
* CreateDSBufferPCM: creates a PCM direct sound buffer.
*****************************************************************************
* We first try to create a WAVE_FORMAT_IEEE_FLOAT buffer if supported by
* the hardware, otherwise we create a WAVE_FORMAT_PCM buffer.
****************************************************************************/
static int CreateDSBufferPCM( aout_instance_t *p_aout, vlc_fourcc_t *i_format,
int i_channels, int i_nb_channels, int i_rate,
bool b_probe )
{
/* Float32 audio samples are not supported for 5.1 output on the emu101k */
if( !var_GetBool( p_aout, "directx-audio-float32" ) ||
i_nb_channels > 2 ||
CreateDSBuffer( p_aout, VLC_CODEC_FL32,
i_channels, i_nb_channels, i_rate,
FRAME_SIZE * 4 * i_nb_channels, b_probe )
!= VLC_SUCCESS )
{
if ( CreateDSBuffer( p_aout, VLC_CODEC_S16L,
i_channels, i_nb_channels, i_rate,
FRAME_SIZE * 2 * i_nb_channels, b_probe )
!= VLC_SUCCESS )
{
return VLC_EGENERIC;
}
else
{
*i_format = VLC_CODEC_S16L;
return VLC_SUCCESS;
}
}
else
{
*i_format = VLC_CODEC_FL32;
return VLC_SUCCESS;
}
}
/*****************************************************************************
* DestroyDSBuffer
*****************************************************************************
* This function destroys the secondary buffer.
*****************************************************************************/
static void DestroyDSBuffer( aout_instance_t *p_aout )
{
if( p_aout->output.p_sys->p_dsbuffer )
{
IDirectSoundBuffer_Release( p_aout->output.p_sys->p_dsbuffer );
p_aout->output.p_sys->p_dsbuffer = NULL;
}
}
/*****************************************************************************
* FillBuffer: Fill in one of the direct sound frame buffers.
*****************************************************************************
* Returns VLC_SUCCESS on success.
*****************************************************************************/
static int FillBuffer( aout_instance_t *p_aout, int i_frame,
aout_buffer_t *p_buffer )
{
notification_thread_t *p_notif = p_aout->output.p_sys->p_notif;
aout_sys_t *p_sys = p_aout->output.p_sys;
void *p_write_position, *p_wrap_around;
unsigned long l_bytes1, l_bytes2;
HRESULT dsresult;
/* Before copying anything, we have to lock the buffer */
dsresult = IDirectSoundBuffer_Lock(
p_sys->p_dsbuffer, /* DS buffer */
i_frame * p_notif->i_frame_size, /* Start offset */
p_notif->i_frame_size, /* Number of bytes */
&p_write_position, /* Address of lock start */
&l_bytes1, /* Count of bytes locked before wrap around */
&p_wrap_around, /* Buffer adress (if wrap around) */
&l_bytes2, /* Count of bytes after wrap around */
0 ); /* Flags */
if( dsresult == DSERR_BUFFERLOST )
{
IDirectSoundBuffer_Restore( p_sys->p_dsbuffer );
dsresult = IDirectSoundBuffer_Lock(
p_sys->p_dsbuffer,
i_frame * p_notif->i_frame_size,
p_notif->i_frame_size,
&p_write_position,
&l_bytes1,
&p_wrap_around,
&l_bytes2,
0 );
}
if( dsresult != DS_OK )
{
msg_Warn( p_notif, "cannot lock buffer" );
if( p_buffer ) aout_BufferFree( p_buffer );
return VLC_EGENERIC;
}
if( p_buffer == NULL )
{
memset( p_write_position, 0, l_bytes1 );
}
else
{
if( p_sys->b_chan_reorder )
{
/* Do the channel reordering here */
aout_ChannelReorder( p_buffer->p_buffer, p_buffer->i_buffer,
p_sys->i_channels, p_sys->pi_chan_table,
p_sys->i_bits_per_sample );
}
vlc_memcpy( p_write_position, p_buffer->p_buffer, l_bytes1 );
aout_BufferFree( p_buffer );
}
/* Now the data has been copied, unlock the buffer */
IDirectSoundBuffer_Unlock( p_sys->p_dsbuffer, p_write_position, l_bytes1,
p_wrap_around, l_bytes2 );
p_notif->i_write_slot = (i_frame + 1) % FRAMES_NUM;
return VLC_SUCCESS;
}
/*****************************************************************************
* DirectSoundThread: this thread will capture play notification events.
*****************************************************************************
* We use this thread to emulate a callback mechanism. The thread probes for
* event notification and fills up the DS secondary buffer when needed.
*****************************************************************************/
static void* DirectSoundThread( vlc_object_t *p_this )
{
notification_thread_t *p_notif = (notification_thread_t*)p_this;
aout_instance_t *p_aout = p_notif->p_aout;
mtime_t last_time;
int canc = vlc_savecancel ();
/* We don't want any resampling when using S/PDIF output */
bool b_sleek = (p_aout->output.output.i_format == VLC_CODEC_SPDIFL);
msg_Dbg( p_notif, "DirectSoundThread ready" );
/* Wait here until Play() is called */
WaitForSingleObject( p_notif->event, INFINITE );
if( vlc_object_alive (p_notif) )
{
HRESULT dsresult;
mwait( p_notif->start_date - AOUT_PTS_TOLERANCE / 2 );
/* start playing the buffer */
dsresult = IDirectSoundBuffer_Play( p_aout->output.p_sys->p_dsbuffer,
0, /* Unused */
0, /* Unused */
DSBPLAY_LOOPING ); /* Flags */
if( dsresult == DSERR_BUFFERLOST )
{
IDirectSoundBuffer_Restore( p_aout->output.p_sys->p_dsbuffer );
dsresult = IDirectSoundBuffer_Play(
p_aout->output.p_sys->p_dsbuffer,
0, /* Unused */
0, /* Unused */
DSBPLAY_LOOPING ); /* Flags */
}
if( dsresult != DS_OK )
{
msg_Err( p_aout, "cannot start playing buffer" );
}
}
last_time = mdate();
while( vlc_object_alive (p_notif) )
{
DWORD l_read;
int l_queued = 0, l_free_slots;
unsigned i_frame_siz = p_aout->output.i_nb_samples;
mtime_t mtime = mdate();
int i;
/*
* Fill in as much audio data as we can in our circular buffer
*/
/* Find out current play position */
if FAILED( IDirectSoundBuffer_GetCurrentPosition(
p_aout->output.p_sys->p_dsbuffer, &l_read, NULL ) )
{
msg_Err( p_aout, "GetCurrentPosition() failed!" );
l_read = 0;
}
/* Detect underruns */
if( l_queued && mtime - last_time >
INT64_C(1000000) * l_queued / p_aout->output.output.i_rate )
{
msg_Dbg( p_aout, "detected underrun!" );
}
last_time = mtime;
/* Try to fill in as many frame buffers as possible */
l_read /= (p_aout->output.output.i_bytes_per_frame /
p_aout->output.output.i_frame_length);
l_queued = p_notif->i_write_slot * i_frame_siz - l_read;
if( l_queued < 0 ) l_queued += (i_frame_siz * FRAMES_NUM);
l_free_slots = (FRAMES_NUM * i_frame_siz - l_queued) / i_frame_siz;
for( i = 0; i < l_free_slots; i++ )
{
aout_buffer_t *p_buffer = aout_OutputNextBuffer( p_aout,
mtime + INT64_C(1000000) * (i * i_frame_siz + l_queued) /
p_aout->output.output.i_rate, b_sleek );
/* If there is no audio data available and we have some buffered
* already, then just wait for the next time */
if( !p_buffer && (i || l_queued / i_frame_siz) ) break;
if( FillBuffer( p_aout, p_notif->i_write_slot % FRAMES_NUM,
p_buffer ) != VLC_SUCCESS ) break;
}
/* Sleep a reasonable amount of time */
l_queued += (i * i_frame_siz);
msleep( INT64_C(1000000) * l_queued / p_aout->output.output.i_rate / 2 );
}
/* make sure the buffer isn't playing */
IDirectSoundBuffer_Stop( p_aout->output.p_sys->p_dsbuffer );
/* free the event */
CloseHandle( p_notif->event );
vlc_restorecancel (canc);
msg_Dbg( p_notif, "DirectSoundThread exiting" );
return NULL;
}
/*****************************************************************************
* CallBackConfigNBEnum: callback to get the number of available devices
*****************************************************************************/
static int CALLBACK CallBackConfigNBEnum( LPGUID p_guid, LPCWSTR psz_desc,
LPCWSTR psz_mod, LPVOID p_nb )
{
VLC_UNUSED( psz_mod ); VLC_UNUSED( psz_desc ); VLC_UNUSED( p_guid );
int * a = (int *)p_nb;
(*a)++;
return true;
}
/*****************************************************************************
* CallBackConfigEnum: callback to add available devices to the preferences list
*****************************************************************************/
static int CALLBACK CallBackConfigEnum( LPGUID p_guid, LPCWSTR psz_desc,
LPCWSTR psz_mod, LPVOID _p_item )
{
VLC_UNUSED( psz_mod ); VLC_UNUSED( p_guid );
module_config_t *p_item = (module_config_t *) _p_item;
p_item->ppsz_list[p_item->i_list] = FromWide( psz_desc );
p_item->ppsz_list_text[p_item->i_list] = FromWide( psz_desc );
p_item->i_list++;
return true;
}
/*****************************************************************************
* ReloadDirectXDevices: store the list of devices in preferences
*****************************************************************************/
static int ReloadDirectXDevices( vlc_object_t *p_this, char const *psz_name,
vlc_value_t newval, vlc_value_t oldval, void *data )
{
VLC_UNUSED( newval ); VLC_UNUSED( oldval ); VLC_UNUSED( data );
module_config_t *p_item = config_FindConfig( p_this, psz_name );
if( !p_item ) return VLC_SUCCESS;
/* Clear-up the current list */
if( p_item->i_list )
{
for( int i = 0; i < p_item->i_list; i++ )
{
free((char *)(p_item->ppsz_list[i]) );
free((char *)(p_item->ppsz_list_text[i]) );
}
}
HRESULT (WINAPI *OurDirectSoundEnumerate)(LPDSENUMCALLBACKW, LPVOID);
HANDLE hdsound_dll = LoadLibrary("DSOUND.DLL");
if( hdsound_dll == NULL )
{
msg_Warn( p_this, "cannot open DSOUND.DLL" );
return VLC_SUCCESS;
}
/* Get DirectSoundEnumerate */
OurDirectSoundEnumerate = (void *)
GetProcAddress( hdsound_dll, "DirectSoundEnumerateW" );
if( OurDirectSoundEnumerate == NULL )
goto error;
int nb_devices = 0;
OurDirectSoundEnumerate(CallBackConfigNBEnum, &nb_devices);
msg_Dbg(p_this,"found %d devices", nb_devices);
p_item->ppsz_list = xrealloc( p_item->ppsz_list,
nb_devices * sizeof(char *) );
p_item->ppsz_list_text = xrealloc( p_item->ppsz_list_text,
nb_devices * sizeof(char *) );
p_item->i_list = 0;
OurDirectSoundEnumerate(CallBackConfigEnum, p_item);
/* Signal change to the interface */
p_item->b_dirty = true;
error:
FreeLibrary(hdsound_dll);
return VLC_SUCCESS;
}
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