Commit 9999718f authored by gbazin's avatar gbazin
Browse files

* modules/audio_output/directx.c: added multichannel support to the
   directx plugin.
* modules/audio_output/waveout.c: fixed quad audio channels detection and
   a few misplaced debug messages.
* configure.ac.in: don't link anymore the rc plugin with the winsock lib.
parent 00568c5d
......@@ -129,7 +129,6 @@ case "x${target_os}" in
LDFLAGS_access_udp="${LDFLAGS_access_udp} -lws2_32"
LDFLAGS_access_ftp="${LDFLAGS_access_ftp} -lws2_32"
LDFLAGS_access_output_udp="${LDFLAGS_access_output_udp} -lws2_32"
LDFLAGS_rc="${LDFLAGS_rc} -lws2_32"
LDFLAGS_sap="${LDFLAGS_sap} -lws2_32"
fi
;;
......
......@@ -2,7 +2,7 @@
* directx.c: Windows DirectX audio output method
*****************************************************************************
* Copyright (C) 2001 VideoLAN
* $Id: directx.c,v 1.11 2003/02/14 17:00:02 ipkiss Exp $
* $Id: directx.c,v 1.12 2003/02/17 22:19:24 gbazin Exp $
*
* Authors: Gildas Bazin <gbazin@netcourrier.com>
*
......@@ -60,6 +60,60 @@ DEFINE_GUID(IID_IDirectSoundNotify, 0xb0210783, 0x89cd, 0x11d0, 0xaf, 0x8, 0x0,
# define WAVE_FORMAT_IEEE_FLOAT 0x0003
#endif
#ifndef WAVE_FORMAT_DOLBY_AC3_SPDIF
# define WAVE_FORMAT_DOLBY_AC3_SPDIF 0x0092
#endif
#ifndef WAVE_FORMAT_EXTENSIBLE
#define WAVE_FORMAT_EXTENSIBLE 0xFFFE
#endif
#ifndef SPEAKER_FRONT_LEFT
# define SPEAKER_FRONT_LEFT 0x1
# define SPEAKER_FRONT_RIGHT 0x2
# define SPEAKER_FRONT_CENTER 0x4
# define SPEAKER_LOW_FREQUENCY 0x8
# define SPEAKER_BACK_LEFT 0x10
# define SPEAKER_BACK_RIGHT 0x20
# define SPEAKER_FRONT_LEFT_OF_CENTER 0x40
# define SPEAKER_FRONT_RIGHT_OF_CENTER 0x80
# define SPEAKER_BACK_CENTER 0x100
# define SPEAKER_SIDE_LEFT 0x200
# define SPEAKER_SIDE_RIGHT 0x400
# define SPEAKER_TOP_CENTER 0x800
# define SPEAKER_TOP_FRONT_LEFT 0x1000
# define SPEAKER_TOP_FRONT_CENTER 0x2000
# define SPEAKER_TOP_FRONT_RIGHT 0x4000
# define SPEAKER_TOP_BACK_LEFT 0x8000
# define SPEAKER_TOP_BACK_CENTER 0x10000
# define SPEAKER_TOP_BACK_RIGHT 0x20000
# define SPEAKER_RESERVED 0x80000000
#endif
#ifndef _WAVEFORMATEXTENSIBLE_
typedef struct {
WAVEFORMATEX Format;
union {
WORD wValidBitsPerSample; /* bits of precision */
WORD wSamplesPerBlock; /* valid if wBitsPerSample==0 */
WORD wReserved; /* If neither applies, set to zero. */
} Samples;
DWORD dwChannelMask; /* which channels are */
/* present in stream */
GUID SubFormat;
} WAVEFORMATEXTENSIBLE, *PWAVEFORMATEXTENSIBLE;
#endif
#ifndef KSDATAFORMAT_SUBTYPE_IEEE_FLOAT
DEFINE_GUID( KSDATAFORMAT_SUBTYPE_IEEE_FLOAT, WAVE_FORMAT_IEEE_FLOAT, 0x0000, 0x0010, 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71 );
#endif
#ifndef KSDATAFORMAT_SUBTYPE_PCM
DEFINE_GUID( KSDATAFORMAT_SUBTYPE_PCM, WAVE_FORMAT_PCM, 0x0000, 0x0010, 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71 );
#endif
#ifndef KSDATAFORMAT_SUBTYPE_DOLBY_AC3_SPDIF
DEFINE_GUID( KSDATAFORMAT_SUBTYPE_DOLBY_AC3_SPDIF, WAVE_FORMAT_DOLBY_AC3_SPDIF, 0x0000, 0x0010, 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71 );
#endif
/*****************************************************************************
* notification_thread_t: DirectX event thread
*****************************************************************************/
......@@ -84,36 +138,56 @@ typedef struct notification_thread_t
*****************************************************************************/
struct aout_sys_t
{
HINSTANCE hdsound_dll; /* handle of the opened dsound dll */
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) */
LPDIRECTSOUNDNOTIFY p_dsnotify; /* the position notify interface */
notification_thread_t *p_notif; /* DirectSoundThread id */
HINSTANCE hdsound_dll; /* handle of the opened dsound dll */
int b_playing; /* playing status */
notification_thread_t * p_notif; /* DirectSoundThread id */
int i_frame_size; /* Size in bytes of one frame */
int b_playing; /* playing status */
vlc_bool_t b_chan_reorder; /* do we need channel reordering */
int *pi_chan_table;
uint32_t i_channel_mask;
};
static const uint32_t pi_channels_in[] =
{ AOUT_CHAN_LEFT, AOUT_CHAN_RIGHT,
AOUT_CHAN_REARLEFT, AOUT_CHAN_REARRIGHT,
AOUT_CHAN_CENTER, AOUT_CHAN_LFE };
static const uint32_t pi_channels_out[] =
{ SPEAKER_FRONT_LEFT, SPEAKER_FRONT_RIGHT,
SPEAKER_BACK_LEFT, SPEAKER_BACK_RIGHT,
SPEAKER_FRONT_CENTER, SPEAKER_LOW_FREQUENCY };
static const uint32_t pi_channels_ordered[] =
{ SPEAKER_FRONT_LEFT, SPEAKER_FRONT_RIGHT, SPEAKER_FRONT_CENTER,
SPEAKER_LOW_FREQUENCY,
SPEAKER_BACK_LEFT, SPEAKER_BACK_RIGHT };
/*****************************************************************************
* Local prototypes.
*****************************************************************************/
static int OpenAudio ( vlc_object_t * );
static void CloseAudio ( vlc_object_t * );
static void Play ( aout_instance_t * );
/* local functions */
static int DirectxCreateSecondaryBuffer ( aout_instance_t * );
static void DirectxDestroySecondaryBuffer( aout_instance_t * );
static int DirectxInitDSound ( aout_instance_t * );
static void DirectSoundThread ( notification_thread_t * );
static int DirectxFillBuffer ( aout_instance_t *, int,
aout_buffer_t * );
static void Probe ( aout_instance_t * );
static int InitDirectSound ( aout_instance_t * );
static int CreateDSBuffer ( aout_instance_t *, int, int, int, int, int, vlc_bool_t );
static int CreateDSBufferPCM ( aout_instance_t *, int*, int, int, int, vlc_bool_t );
static void DestroyDSBuffer ( aout_instance_t * );
static void DirectSoundThread ( notification_thread_t * );
static int FillBuffer ( aout_instance_t *, int, aout_buffer_t * );
static void CheckReordering ( aout_instance_t *, int );
static void InterleaveFloat32 ( float *, int *, int );
static void InterleaveS16 ( int16_t *, int *, int );
/*****************************************************************************
* Module descriptor
......@@ -133,9 +207,10 @@ vlc_module_end();
static int OpenAudio( vlc_object_t *p_this )
{
aout_instance_t * p_aout = (aout_instance_t *)p_this;
vlc_value_t val;
int i;
msg_Dbg( p_aout, "Open" );
msg_Dbg( p_aout, "OpenAudio" );
/* Allocate structure */
p_aout->output.p_sys = malloc( sizeof( aout_sys_t ) );
......@@ -151,39 +226,111 @@ static int OpenAudio( vlc_object_t *p_this )
p_aout->output.p_sys->p_dsnotify = NULL;
p_aout->output.p_sys->p_notif = NULL;
p_aout->output.p_sys->b_playing = 0;
p_aout->output.p_sys->pi_chan_table = NULL;
p_aout->output.pf_play = Play;
aout_VolumeSoftInit( p_aout );
/* Initialise DirectSound */
if( DirectxInitDSound( p_aout ) )
if( InitDirectSound( p_aout ) )
{
msg_Err( p_aout, "cannot initialize DirectSound" );
goto error;
}
/* Now we need to setup DirectSound play notification */
/* 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;
/* first we need to create the notification events */
if( var_Type( p_aout, "audio-device" ) == 0 )
{
Probe( p_aout );
}
if( var_Get( p_aout, "audio-device", &val ) < 0 )
{
/* Probe() has failed. */
free( p_aout->output.p_sys );
return VLC_EGENERIC;
}
/* Then create the notification events */
for( i = 0; i < FRAMES_NUM; i++ )
p_aout->output.p_sys->p_notif->p_events[i].hEventNotify =
CreateEvent( NULL, FALSE, FALSE, NULL );
/* then create a new secondary buffer */
p_aout->output.output.i_format = VLC_FOURCC('f','l','3','2');
if( DirectxCreateSecondaryBuffer( p_aout ) )
/* Open the device */
if( !strcmp( val.psz_string, N_("A/52 over S/PDIF") ) )
{
msg_Dbg( p_aout, "cannot create WAVE_FORMAT_IEEE_FLOAT buffer" );
free( val.psz_string );
p_aout->output.output.i_format = VLC_FOURCC('s','p','d','i');
/* 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_FOURCC('s','p','d','i'),
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, VLC_FALSE )
!= VLC_SUCCESS )
{
msg_Err( p_aout, "cannot open waveout audio device" );
free( p_aout->output.p_sys );
return VLC_EGENERIC;
}
aout_VolumeNoneInit( p_aout );
}
else
{
if( !strcmp( val.psz_string, N_("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( !strcmp( val.psz_string, N_("2 Front 2 Rear") ) )
{
p_aout->output.output.i_physical_channels
= AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT
| AOUT_CHAN_REARLEFT | AOUT_CHAN_REARRIGHT;
}
else if( !strcmp( val.psz_string, "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;
}
free( val.psz_string );
p_aout->output.output.i_format = VLC_FOURCC('s','1','6','l');
if( DirectxCreateSecondaryBuffer( p_aout ) )
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, VLC_FALSE )
!= VLC_SUCCESS )
{
msg_Err( p_aout, "cannot create WAVE_FORMAT_PCM buffer" );
return 1;
msg_Err( p_aout, "cannot open waveout 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 );
p_aout->output.p_sys->i_frame_size =
FRAME_SIZE * p_aout->output.output.i_bytes_per_frame;
aout_VolumeSoftInit( p_aout );
}
/* then launch the notification thread */
......@@ -191,7 +338,7 @@ static int OpenAudio( vlc_object_t *p_this )
if( vlc_thread_create( p_aout->output.p_sys->p_notif,
"DirectSound Notification Thread",
DirectSoundThread,
VLC_THREAD_PRIORITY_HIGHEST, 1 ) )
VLC_THREAD_PRIORITY_HIGHEST, VLC_FALSE ) )
{
msg_Err( p_aout, "cannot create DirectSoundThread" );
goto error;
......@@ -199,13 +346,127 @@ static int OpenAudio( vlc_object_t *p_this )
vlc_object_attach( p_aout->output.p_sys->p_notif, p_aout );
return 0;
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;
int i_format;
unsigned int i_physical_channels;
DWORD ui_speaker_config;
var_Create( p_aout, "audio-device", VLC_VAR_STRING | VLC_VAR_HASCHOICE );
/* Test for SPDIF support */
if ( AOUT_FMT_NON_LINEAR( &p_aout->output.output ) )
{
if( CreateDSBuffer( p_aout, VLC_FOURCC('s','p','d','i'),
p_aout->output.output.i_physical_channels,
aout_FormatNbChannels( &p_aout->output.output ),
p_aout->output.output.i_rate,
AOUT_SPDIF_SIZE, VLC_TRUE )
== VLC_SUCCESS )
{
msg_Dbg( p_aout, "device supports A/52 over S/PDIF" );
val.psz_string = N_("A/52 over S/PDIF");
var_Change( p_aout, "audio-device", VLC_VAR_ADDCHOICE, &val );
}
}
/* 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, VLC_TRUE )
== VLC_SUCCESS )
{
val.psz_string = N_("5.1");
var_Change( p_aout, "audio-device", VLC_VAR_ADDCHOICE, &val );
msg_Dbg( p_aout, "device supports 5.1 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, VLC_TRUE )
== VLC_SUCCESS )
{
val.psz_string = N_("2 Front 2 Rear");
var_Change( p_aout, "audio-device", VLC_VAR_ADDCHOICE, &val );
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, VLC_TRUE )
== VLC_SUCCESS )
{
val.psz_string = N_("Stereo");
var_Change( p_aout, "audio-device", VLC_VAR_ADDCHOICE, &val );
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, VLC_TRUE )
== VLC_SUCCESS )
{
val.psz_string = N_("Mono");
var_Change( p_aout, "audio-device", VLC_VAR_ADDCHOICE, &val );
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;
}
switch( DSSPEAKER_CONFIG(ui_speaker_config) )
{
case DSSPEAKER_5POINT1:
val.psz_string = N_("5.1");
break;
case DSSPEAKER_QUAD:
val.psz_string = N_("2 Front 2 Rear");
break;
case DSSPEAKER_MONO:
val.psz_string = N_("Mono");
break;
case DSSPEAKER_SURROUND:
case DSSPEAKER_STEREO:
default:
val.psz_string = N_("Stereo");
break;
}
var_Set( p_aout, "audio-device", val );
var_AddCallback( p_aout, "audio-device", aout_ChannelsRestart, NULL );
val.b_bool = VLC_TRUE;
var_Set( p_aout, "intf-change", val );
}
/*****************************************************************************
* 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
......@@ -225,7 +486,7 @@ static void Play( aout_instance_t *p_aout )
/* fill in the first samples */
p_buffer = aout_FifoPop( p_aout, &p_aout->output.fifo );
DirectxFillBuffer( p_aout, 0, p_buffer );
FillBuffer( p_aout, 0, p_buffer );
/* wake up the audio output thread */
SetEvent( p_aout->output.p_sys->p_notif->p_events[0].hEventNotify );
......@@ -239,7 +500,7 @@ static void CloseAudio( vlc_object_t *p_this )
{
aout_instance_t * p_aout = (aout_instance_t *)p_this;
msg_Dbg( p_aout, "Close" );
msg_Dbg( p_aout, "CloseAudio" );
/* kill the position notification thread, if any */
if( p_aout->output.p_sys->p_notif )
......@@ -260,7 +521,7 @@ static void CloseAudio( vlc_object_t *p_this )
}
/* release the secondary buffer */
DirectxDestroySecondaryBuffer( p_aout );
DestroyDSBuffer( p_aout );
/* finally release the DirectSound object */
if( p_aout->output.p_sys->p_dsobject )
......@@ -270,13 +531,16 @@ static void CloseAudio( vlc_object_t *p_this )
if( p_aout->output.p_sys->hdsound_dll )
FreeLibrary( p_aout->output.p_sys->hdsound_dll );
if( p_aout->output.p_sys->pi_chan_table )
free( p_aout->output.p_sys->pi_chan_table );
free( p_aout->output.p_sys );
}
/*****************************************************************************
* DirectxInitDSound: handle all the gory details of DirectSound initialisation
* InitDirectSound: handle all the gory details of DirectSound initialisation
*****************************************************************************/
static int DirectxInitDSound( aout_instance_t *p_aout )
static int InitDirectSound( aout_instance_t *p_aout )
{
HRESULT (WINAPI *OurDirectSoundCreate)(LPGUID, LPDIRECTSOUND *, LPUNKNOWN);
......@@ -297,8 +561,8 @@ static int DirectxInitDSound( aout_instance_t *p_aout )
}
/* Create the direct sound object */
if( OurDirectSoundCreate( NULL, &p_aout->output.p_sys->p_dsobject, NULL )
!= DS_OK )
if FAILED( OurDirectSoundCreate( NULL, &p_aout->output.p_sys->p_dsobject,
NULL ) )
{
msg_Warn( p_aout, "cannot create a direct sound device" );
goto error;
......@@ -321,7 +585,7 @@ static int DirectxInitDSound( aout_instance_t *p_aout )
msg_Warn( p_aout, "cannot set direct sound cooperative level" );
}
return 0;
return VLC_SUCCESS;
error:
p_aout->output.p_sys->p_dsobject = NULL;
......@@ -330,12 +594,12 @@ static int DirectxInitDSound( aout_instance_t *p_aout )
FreeLibrary( p_aout->output.p_sys->hdsound_dll );
p_aout->output.p_sys->hdsound_dll = NULL;
}
return 1;
return VLC_EGENERIC;
}
/*****************************************************************************
* DirectxCreateSecondaryBuffer
* 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:
......@@ -344,80 +608,98 @@ static int DirectxInitDSound( aout_instance_t *p_aout )
* 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 and create another one.
* you have to release the current one and create another.
*****************************************************************************/
static int DirectxCreateSecondaryBuffer( aout_instance_t *p_aout )
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, vlc_bool_t b_probe )
{
WAVEFORMATEX waveformat;
WAVEFORMATEXTENSIBLE waveformat;
DSBUFFERDESC dsbdesc;
DSBCAPS dsbcaps;
int i_nb_channels, i;
unsigned int i;
i_nb_channels = aout_FormatNbChannels( &p_aout->output.output );
if ( i_nb_channels >= 2 )
{
i_nb_channels = 2;
p_aout->output.output.i_physical_channels =
AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT;
}
else
/* First set the sound buffer format */
waveformat.dwChannelMask = 0;
for( i = 0; i < sizeof(pi_channels_in)/sizeof(uint32_t); i++ )
{
i_nb_channels = 1;
p_aout->output.output.i_physical_channels =
AOUT_CHAN_CENTER;
if( i_channels & pi_channels_in[i] )
waveformat.dwChannelMask |= pi_channels_out[i];
}
/* First set the buffer format */
memset( &waveformat, 0, sizeof(WAVEFORMATEX) );
switch( p_aout->output.output.i_format )
switch( i_format )
{
case VLC_FOURCC('s','1','6','l'):
waveformat.wFormatTag = WAVE_FORMAT_PCM;
waveformat.wBitsPerSample = 16;
case VLC_FOURCC('s','p','d','i'):
i_nb_channels = 2;
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_FOURCC('f','l','3','2'):
waveformat.wFormatTag = WAVE_FORMAT_IEEE_FLOAT;
waveformat.wBitsPerSample = sizeof(float) * 8;
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_FOURCC('s','1','6','l'):
waveformat.Format.wBitsPerSample = 16;
waveformat.Samples.wValidBitsPerSample =
waveformat.Format.wBitsPerSample;
waveformat.Format.wFormatTag = WAVE_FORMAT_PCM;
waveformat.SubFormat = KSDATAFORMAT_SUBTYPE_PCM;
break;
}
waveformat.nChannels = i_nb_channels;
waveformat.nSamplesPerSec = p_aout->output.output.i_rate;
waveformat.nBlockAlign = waveformat.wBitsPerSample / 8 *
waveformat.nChannels;
waveformat.nAvgBytesPerSec = waveformat.nSamplesPerSec *
waveformat.nBlockAlign;
aout_FormatPrepare( &p_aout->output.output );
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;
/* 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);
}
/* Then fill in the descriptor */
/* Then fill in the direct sound descriptor */
memset(&dsbdesc, 0, sizeof(DSBUFFERDESC));
dsbdesc.dwSize = sizeof(DSBUFFERDESC);
dsbdesc.dwFlags = DSBCAPS_GETCURRENTPOSITION2/* Better position accuracy */
| DSBCAPS_CTRLPOSITIONNOTIFY /* We need notification */
| DSBCAPS_GLOBALFOCUS; /* Allows background playing */
dsbdesc.dwBufferBytes = FRAME_SIZE * FRAMES_NUM /* buffer size */
* p_aout->output.output.i_bytes_per_frame;
dsbdesc.lpwfxFormat = &waveformat;