vlc-0.8.4a: /home/huihoo/src/vlc/vlc-0.8.4a/modules/audio

00001 /*****************************************************************************
00002  * waveout.c : Windows waveOut plugin for vlc
00003  *****************************************************************************
00004  * Copyright (C) 2001 the VideoLAN team
00005  * $Id: waveout.c 13399 2005-11-26 16:37:49Z gbazin $
00006  *
00007  * Authors: Gildas Bazin <[email protected]>
00008  *
00009  * This program is free software; you can redistribute it and/or modify
00010  * it under the terms of the GNU General Public License as published by
00011  * the Free Software Foundation; either version 2 of the License, or
00012  * (at your option) any later version.
00013  *
00014  * This program is distributed in the hope that it will be useful,
00015  * but WITHOUT ANY WARRANTY; without even the implied warranty of
00016  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
00017  * GNU General Public License for more details.
00018  *
00019  * You should have received a copy of the GNU General Public License
00020  * along with this program; if not, write to the Free Software
00021  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111, USA.
00022  *****************************************************************************/
00023 
00024 /*****************************************************************************
00025  * Preamble
00026  *****************************************************************************/
00027 #include <string.h>                                            /* strerror() */
00028 #include <stdlib.h>                            /* calloc(), malloc(), free() */
00029 
00030 #include <vlc/vlc.h>
00031 #include <vlc/aout.h>
00032 #include "aout_internal.h"
00033 
00034 #include <windows.h>
00035 #include <mmsystem.h>
00036 
00037 #define FRAME_SIZE 4096              /* The size is in samples, not in bytes */
00038 #define FRAMES_NUM 8
00039 
00040 /*****************************************************************************
00041  * Useful macros
00042  *****************************************************************************/
00043 #ifdef UNDER_CE
00044 #   define DWORD_PTR DWORD
00045 #   ifdef waveOutGetDevCaps
00046 #       undef waveOutGetDevCaps
00047         MMRESULT WINAPI waveOutGetDevCaps(UINT, LPWAVEOUTCAPS, UINT);
00048 #   endif
00049 #endif
00050 
00051 #ifndef WAVE_FORMAT_IEEE_FLOAT
00052 #   define WAVE_FORMAT_IEEE_FLOAT 0x0003
00053 #endif
00054 
00055 #ifndef WAVE_FORMAT_DOLBY_AC3_SPDIF
00056 #   define WAVE_FORMAT_DOLBY_AC3_SPDIF 0x0092
00057 #endif
00058 
00059 #ifndef WAVE_FORMAT_EXTENSIBLE
00060 #define  WAVE_FORMAT_EXTENSIBLE   0xFFFE
00061 #endif
00062 
00063 #ifndef SPEAKER_FRONT_LEFT
00064 #   define SPEAKER_FRONT_LEFT             0x1
00065 #   define SPEAKER_FRONT_RIGHT            0x2
00066 #   define SPEAKER_FRONT_CENTER           0x4
00067 #   define SPEAKER_LOW_FREQUENCY          0x8
00068 #   define SPEAKER_BACK_LEFT              0x10
00069 #   define SPEAKER_BACK_RIGHT             0x20
00070 #   define SPEAKER_FRONT_LEFT_OF_CENTER   0x40
00071 #   define SPEAKER_FRONT_RIGHT_OF_CENTER  0x80
00072 #   define SPEAKER_BACK_CENTER            0x100
00073 #   define SPEAKER_SIDE_LEFT              0x200
00074 #   define SPEAKER_SIDE_RIGHT             0x400
00075 #   define SPEAKER_TOP_CENTER             0x800
00076 #   define SPEAKER_TOP_FRONT_LEFT         0x1000
00077 #   define SPEAKER_TOP_FRONT_CENTER       0x2000
00078 #   define SPEAKER_TOP_FRONT_RIGHT        0x4000
00079 #   define SPEAKER_TOP_BACK_LEFT          0x8000
00080 #   define SPEAKER_TOP_BACK_CENTER        0x10000
00081 #   define SPEAKER_TOP_BACK_RIGHT         0x20000
00082 #   define SPEAKER_RESERVED               0x80000000
00083 #endif
00084 
00085 #ifndef _WAVEFORMATEXTENSIBLE_
00086 typedef struct {
00087     WAVEFORMATEX    Format;
00088     union {
00089         WORD wValidBitsPerSample;       /* bits of precision  */
00090         WORD wSamplesPerBlock;          /* valid if wBitsPerSample==0 */
00091         WORD wReserved;                 /* If neither applies, set to zero. */
00092     } Samples;
00093     DWORD           dwChannelMask;      /* which channels are */
00094                                         /* present in stream  */
00095     GUID            SubFormat;
00096 } WAVEFORMATEXTENSIBLE, *PWAVEFORMATEXTENSIBLE;
00097 #endif
00098 
00099 static const GUID __KSDATAFORMAT_SUBTYPE_IEEE_FLOAT = {WAVE_FORMAT_IEEE_FLOAT, 0x0000, 0x0010, {0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}};
00100 static const GUID __KSDATAFORMAT_SUBTYPE_PCM = {WAVE_FORMAT_PCM, 0x0000, 0x0010, {0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}};
00101 static const GUID __KSDATAFORMAT_SUBTYPE_DOLBY_AC3_SPDIF = {WAVE_FORMAT_DOLBY_AC3_SPDIF, 0x0000, 0x0010, {0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}};
00102 
00103 /*****************************************************************************
00104  * Local prototypes
00105  *****************************************************************************/
00106 static int  Open         ( vlc_object_t * );
00107 static void Close        ( vlc_object_t * );
00108 static void Play         ( aout_instance_t * );
00109 
00110 /*****************************************************************************
00111  * notification_thread_t: waveOut event thread
00112  *****************************************************************************/
00113 typedef struct notification_thread_t
00114 {
00115     VLC_COMMON_MEMBERS
00116     aout_instance_t *p_aout;
00117 
00118 } notification_thread_t;
00119 
00120 /* local functions */
00121 static void Probe        ( aout_instance_t * );
00122 static int OpenWaveOut   ( aout_instance_t *, int, int, int, int, vlc_bool_t );
00123 static int OpenWaveOutPCM( aout_instance_t *, int*, int, int, int, vlc_bool_t );
00124 static int PlayWaveOut   ( aout_instance_t *, HWAVEOUT, WAVEHDR *,
00125                            aout_buffer_t * );
00126 
00127 static void CALLBACK WaveOutCallback ( HWAVEOUT, UINT, DWORD, DWORD, DWORD );
00128 static void WaveOutThread( notification_thread_t * );
00129 
00130 static int VolumeInfos( aout_instance_t *, audio_volume_t * );
00131 static int VolumeGet( aout_instance_t *, audio_volume_t * );
00132 static int VolumeSet( aout_instance_t *, audio_volume_t );
00133 
00134 /*****************************************************************************
00135  * Module descriptor
00136  *****************************************************************************/
00137 #define FLOAT_TEXT N_("Use float32 output")
00138 #define FLOAT_LONGTEXT N_( \
00139     "The option allows you to enable or disable the high-quality float32 " \
00140     "audio output mode (which is not well supported by some soundcards)." )
00141 
00142 vlc_module_begin();
00143     set_shortname( "WaveOut" );
00144     set_description( _("Win32 waveOut extension output") );
00145     set_capability( "audio output", 50 );
00146     set_category( CAT_AUDIO );
00147     set_subcategory( SUBCAT_AUDIO_AOUT );
00148     add_bool( "waveout-float32", 1, 0, FLOAT_TEXT, FLOAT_LONGTEXT, VLC_TRUE );
00149     set_callbacks( Open, Close );
00150 vlc_module_end();
00151 
00152 /*****************************************************************************
00153  * aout_sys_t: waveOut audio output method descriptor
00154  *****************************************************************************
00155  * This structure is part of the audio output thread descriptor.
00156  * It describes the waveOut specific properties of an audio device.
00157  *****************************************************************************/
00158 struct aout_sys_t
00159 {
00160     HWAVEOUT h_waveout;                        /* handle to waveout instance */
00161 
00162     WAVEFORMATEXTENSIBLE waveformat;                         /* audio format */
00163 
00164     WAVEHDR waveheader[FRAMES_NUM];
00165 
00166     notification_thread_t *p_notif;                      /* WaveOutThread id */
00167     HANDLE event;
00168 
00169     int i_buffer_size;
00170 
00171     byte_t *p_silence_buffer;               /* buffer we use to play silence */
00172 
00173     vlc_bool_t b_chan_reorder;              /* do we need channel reordering */
00174     int pi_chan_table[AOUT_CHAN_MAX];
00175 };
00176 
00177 static const uint32_t pi_channels_src[] =
00178     { AOUT_CHAN_LEFT, AOUT_CHAN_RIGHT,
00179       AOUT_CHAN_MIDDLELEFT, AOUT_CHAN_MIDDLERIGHT,
00180       AOUT_CHAN_REARLEFT, AOUT_CHAN_REARRIGHT,
00181       AOUT_CHAN_CENTER, AOUT_CHAN_LFE, 0 };
00182 static const uint32_t pi_channels_in[] =
00183     { SPEAKER_FRONT_LEFT, SPEAKER_FRONT_RIGHT,
00184       SPEAKER_SIDE_LEFT, SPEAKER_SIDE_RIGHT,
00185       SPEAKER_BACK_LEFT, SPEAKER_BACK_RIGHT,
00186       SPEAKER_FRONT_CENTER, SPEAKER_LOW_FREQUENCY, 0 };
00187 static const uint32_t pi_channels_out[] =
00188     { SPEAKER_FRONT_LEFT, SPEAKER_FRONT_RIGHT,
00189       SPEAKER_FRONT_CENTER, SPEAKER_LOW_FREQUENCY,
00190       SPEAKER_BACK_LEFT, SPEAKER_BACK_RIGHT,
00191       SPEAKER_SIDE_LEFT, SPEAKER_SIDE_RIGHT, 0 };
00192 
00193 /*****************************************************************************
00194  * Open: open the audio device
00195  *****************************************************************************
00196  * This function opens and setups Win32 waveOut
00197  *****************************************************************************/
00198 static int Open( vlc_object_t *p_this )
00199 {
00200     aout_instance_t *p_aout = (aout_instance_t *)p_this;
00201     vlc_value_t val;
00202     int i;
00203 
00204     /* Allocate structure */
00205     p_aout->output.p_sys = malloc( sizeof( aout_sys_t ) );
00206 
00207     if( p_aout->output.p_sys == NULL )
00208     {
00209         msg_Err( p_aout, "out of memory" );
00210         return VLC_EGENERIC;
00211     }
00212 
00213     p_aout->output.pf_play = Play;
00214     p_aout->b_die = VLC_FALSE;
00215 
00216     if( var_Type( p_aout, "audio-device" ) == 0 )
00217     {
00218         Probe( p_aout );
00219     }
00220 
00221     if( var_Get( p_aout, "audio-device", &val ) < 0 )
00222     {
00223         /* Probe() has failed. */
00224         free( p_aout->output.p_sys );
00225         return VLC_EGENERIC;
00226     }
00227 
00228     var_Create( p_aout, "waveout-float32", VLC_VAR_BOOL | VLC_VAR_DOINHERIT );
00229 
00230     /* Open the device */
00231     if( val.i_int == AOUT_VAR_SPDIF )
00232     {
00233         p_aout->output.output.i_format = VLC_FOURCC('s','p','d','i');
00234 
00235         if( OpenWaveOut( p_aout, VLC_FOURCC('s','p','d','i'),
00236                          p_aout->output.output.i_physical_channels,
00237                          aout_FormatNbChannels( &p_aout->output.output ),
00238                          p_aout->output.output.i_rate, VLC_FALSE )
00239             != VLC_SUCCESS )
00240         {
00241             msg_Err( p_aout, "cannot open waveout audio device" );
00242             free( p_aout->output.p_sys );
00243             return VLC_EGENERIC;
00244         }
00245 
00246         /* Calculate the frame size in bytes */
00247         p_aout->output.i_nb_samples = A52_FRAME_NB;
00248         p_aout->output.output.i_bytes_per_frame = AOUT_SPDIF_SIZE;
00249         p_aout->output.output.i_frame_length = A52_FRAME_NB;
00250         p_aout->output.p_sys->i_buffer_size =
00251             p_aout->output.output.i_bytes_per_frame;
00252 
00253         aout_VolumeNoneInit( p_aout );
00254     }
00255     else
00256     {
00257         WAVEOUTCAPS wocaps;
00258 
00259         if( val.i_int == AOUT_VAR_5_1 )
00260         {
00261             p_aout->output.output.i_physical_channels
00262                 = AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT | AOUT_CHAN_CENTER
00263                    | AOUT_CHAN_REARLEFT | AOUT_CHAN_REARRIGHT
00264                    | AOUT_CHAN_LFE;
00265         }
00266         else if( val.i_int == AOUT_VAR_2F2R )
00267         {
00268             p_aout->output.output.i_physical_channels
00269                 = AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT
00270                    | AOUT_CHAN_REARLEFT | AOUT_CHAN_REARRIGHT;
00271         }
00272         else if( val.i_int == AOUT_VAR_MONO )
00273         {
00274             p_aout->output.output.i_physical_channels = AOUT_CHAN_CENTER;
00275         }
00276         else
00277         {
00278             p_aout->output.output.i_physical_channels
00279                 = AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT;
00280         }
00281 
00282         if( OpenWaveOutPCM( p_aout, &p_aout->output.output.i_format,
00283                             p_aout->output.output.i_physical_channels,
00284                             aout_FormatNbChannels( &p_aout->output.output ),
00285                             p_aout->output.output.i_rate, VLC_FALSE )
00286             != VLC_SUCCESS )
00287         {
00288             msg_Err( p_aout, "cannot open waveout audio device" );
00289             free( p_aout->output.p_sys );
00290             return VLC_EGENERIC;
00291         }
00292 
00293         /* Calculate the frame size in bytes */
00294         p_aout->output.i_nb_samples = FRAME_SIZE;
00295         aout_FormatPrepare( &p_aout->output.output );
00296         p_aout->output.p_sys->i_buffer_size = FRAME_SIZE *
00297             p_aout->output.output.i_bytes_per_frame;
00298 
00299         aout_VolumeSoftInit( p_aout );
00300 
00301         /* Check for hardware volume support */
00302         if( waveOutGetDevCaps( (UINT_PTR)p_aout->output.p_sys->h_waveout,
00303                                &wocaps, sizeof(wocaps) ) == MMSYSERR_NOERROR &&
00304             wocaps.dwSupport & WAVECAPS_VOLUME )
00305         {
00306             DWORD i_dummy;
00307             if( waveOutGetVolume( p_aout->output.p_sys->h_waveout, &i_dummy )
00308                 == MMSYSERR_NOERROR )
00309             {
00310                 p_aout->output.pf_volume_infos = VolumeInfos;
00311                 p_aout->output.pf_volume_get = VolumeGet;
00312                 p_aout->output.pf_volume_set = VolumeSet;
00313             }
00314         }
00315     }
00316 
00317 
00318     waveOutReset( p_aout->output.p_sys->h_waveout );
00319 
00320     /* Allocate silence buffer */
00321     p_aout->output.p_sys->p_silence_buffer =
00322         malloc( p_aout->output.p_sys->i_buffer_size );
00323     if( p_aout->output.p_sys->p_silence_buffer == NULL )
00324     {
00325         free( p_aout->output.p_sys );
00326         msg_Err( p_aout, "out of memory" );
00327         return 1;
00328     }
00329 
00330     /* Zero the buffer. WinCE doesn't have calloc(). */
00331     memset( p_aout->output.p_sys->p_silence_buffer, 0,
00332             p_aout->output.p_sys->i_buffer_size );
00333 
00334     /* Now we need to setup our waveOut play notification structure */
00335     p_aout->output.p_sys->p_notif =
00336         vlc_object_create( p_aout, sizeof(notification_thread_t) );
00337     p_aout->output.p_sys->p_notif->p_aout = p_aout;
00338     p_aout->output.p_sys->event = CreateEvent( NULL, FALSE, FALSE, NULL );
00339 
00340     /* Then launch the notification thread */
00341     if( vlc_thread_create( p_aout->output.p_sys->p_notif,
00342                            "waveOut Notification Thread", WaveOutThread,
00343                            VLC_THREAD_PRIORITY_HIGHEST, VLC_FALSE ) )
00344     {
00345         msg_Err( p_aout, "cannot create WaveOutThread" );
00346     }
00347 
00348     /* We need to kick off the playback in order to have the callback properly
00349      * working */
00350     for( i = 0; i < FRAMES_NUM; i++ )
00351     {
00352         p_aout->output.p_sys->waveheader[i].dwFlags = WHDR_DONE;
00353         p_aout->output.p_sys->waveheader[i].dwUser = 0;
00354     }
00355     PlayWaveOut( p_aout, p_aout->output.p_sys->h_waveout,
00356                  &p_aout->output.p_sys->waveheader[0], NULL );
00357 
00358     return 0;
00359 }
00360 
00361 /*****************************************************************************
00362  * Probe: probe the audio device for available formats and channels
00363  *****************************************************************************/
00364 static void Probe( aout_instance_t * p_aout )
00365 {
00366     vlc_value_t val, text;
00367     int i_format;
00368     unsigned int i_physical_channels;
00369 
00370     var_Create( p_aout, "audio-device", VLC_VAR_INTEGER | VLC_VAR_HASCHOICE );
00371     text.psz_string = _("Audio Device");
00372     var_Change( p_aout, "audio-device", VLC_VAR_SETTEXT, &text, NULL );
00373 
00374     /* Test for 5.1 support */
00375     i_physical_channels = AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT |
00376                           AOUT_CHAN_CENTER | AOUT_CHAN_REARLEFT |
00377                           AOUT_CHAN_REARRIGHT | AOUT_CHAN_LFE;
00378     if( p_aout->output.output.i_physical_channels == i_physical_channels )
00379     {
00380         if( OpenWaveOutPCM( p_aout, &i_format,
00381                             i_physical_channels, 6,
00382                             p_aout->output.output.i_rate, VLC_TRUE )
00383             == VLC_SUCCESS )
00384         {
00385             val.i_int = AOUT_VAR_5_1;
00386             text.psz_string = N_("5.1");
00387             var_Change( p_aout, "audio-device",
00388                         VLC_VAR_ADDCHOICE, &val, &text );
00389             msg_Dbg( p_aout, "device supports 5.1 channels" );
00390         }
00391     }
00392 
00393     /* Test for 2 Front 2 Rear support */
00394     i_physical_channels = AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT |
00395                           AOUT_CHAN_REARLEFT | AOUT_CHAN_REARRIGHT;
00396     if( ( p_aout->output.output.i_physical_channels & i_physical_channels )
00397         == i_physical_channels )
00398     {
00399         if( OpenWaveOutPCM( p_aout, &i_format,
00400                             i_physical_channels, 4,
00401                             p_aout->output.output.i_rate, VLC_TRUE )
00402             == VLC_SUCCESS )
00403         {
00404             val.i_int = AOUT_VAR_2F2R;
00405             text.psz_string = N_("2 Front 2 Rear");
00406             var_Change( p_aout, "audio-device",
00407                         VLC_VAR_ADDCHOICE, &val, &text );
00408             msg_Dbg( p_aout, "device supports 4 channels" );
00409         }
00410     }
00411 
00412     /* Test for stereo support */
00413     i_physical_channels = AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT;
00414     if( OpenWaveOutPCM( p_aout, &i_format,
00415                         i_physical_channels, 2,
00416                         p_aout->output.output.i_rate, VLC_TRUE )
00417         == VLC_SUCCESS )
00418     {
00419         val.i_int = AOUT_VAR_STEREO;
00420         text.psz_string = N_("Stereo");
00421         var_Change( p_aout, "audio-device", VLC_VAR_ADDCHOICE, &val, &text );
00422         msg_Dbg( p_aout, "device supports 2 channels" );
00423     }
00424 
00425     /* Test for mono support */
00426     i_physical_channels = AOUT_CHAN_CENTER;
00427     if( OpenWaveOutPCM( p_aout, &i_format,
00428                         i_physical_channels, 1,
00429                         p_aout->output.output.i_rate, VLC_TRUE )
00430         == VLC_SUCCESS )
00431     {
00432         val.i_int = AOUT_VAR_MONO;
00433         text.psz_string = N_("Mono");
00434         var_Change( p_aout, "audio-device", VLC_VAR_ADDCHOICE, &val, &text );
00435         msg_Dbg( p_aout, "device supports 1 channel" );
00436     }
00437 
00438     /* Test for SPDIF support */
00439     if ( AOUT_FMT_NON_LINEAR( &p_aout->output.output ) )
00440     {
00441         if( OpenWaveOut( p_aout, VLC_FOURCC('s','p','d','i'),
00442                          p_aout->output.output.i_physical_channels,
00443                          aout_FormatNbChannels( &p_aout->output.output ),
00444                          p_aout->output.output.i_rate, VLC_TRUE )
00445             == VLC_SUCCESS )
00446         {
00447             msg_Dbg( p_aout, "device supports A/52 over S/PDIF" );
00448             val.i_int = AOUT_VAR_SPDIF;
00449             text.psz_string = N_("A/52 over S/PDIF");
00450             var_Change( p_aout, "audio-device",
00451                         VLC_VAR_ADDCHOICE, &val, &text );
00452             if( config_GetInt( p_aout, "spdif" ) )
00453                 var_Set( p_aout, "audio-device", val );
00454         }
00455     }
00456 
00457     var_Change( p_aout, "audio-device", VLC_VAR_CHOICESCOUNT, &val, NULL );
00458     if( val.i_int <= 0 )
00459     {
00460         /* Probe() has failed. */
00461         var_Destroy( p_aout, "audio-device" );
00462         return;
00463     }
00464 
00465     var_AddCallback( p_aout, "audio-device", aout_ChannelsRestart, NULL );
00466 
00467     val.b_bool = VLC_TRUE;
00468     var_Set( p_aout, "intf-change", val );
00469 }
00470 
00471 /*****************************************************************************
00472  * Play: play a sound buffer
00473  *****************************************************************************
00474  * This doesn't actually play the buffer. This just stores the buffer so it
00475  * can be played by the callback thread.
00476  *****************************************************************************/
00477 static void Play( aout_instance_t *_p_aout )
00478 {
00479 }
00480 
00481 /*****************************************************************************
00482  * Close: close the audio device
00483  *****************************************************************************/
00484 static void Close( vlc_object_t *p_this )
00485 {
00486     aout_instance_t *p_aout = (aout_instance_t *)p_this;
00487     aout_sys_t *p_sys = p_aout->output.p_sys;
00488 
00489     /* Before calling waveOutClose we must reset the device */
00490     p_aout->b_die = VLC_TRUE;
00491 
00492     waveOutReset( p_sys->h_waveout );
00493 
00494     /* wake up the audio thread */
00495     SetEvent( p_sys->event );
00496     vlc_thread_join( p_sys->p_notif );
00497     vlc_object_destroy( p_sys->p_notif );
00498     CloseHandle( p_sys->event );
00499 
00500     /* Close the device */
00501     if( waveOutClose( p_sys->h_waveout ) != MMSYSERR_NOERROR )
00502     {
00503         msg_Err( p_aout, "waveOutClose failed" );
00504     }
00505 
00506     free( p_sys->p_silence_buffer );
00507     free( p_sys );
00508 }
00509 
00510 /*****************************************************************************
00511  * OpenWaveOut: open the waveout sound device
00512  ****************************************************************************/
00513 static int OpenWaveOut( aout_instance_t *p_aout, int i_format,
00514                         int i_channels, int i_nb_channels, int i_rate,
00515                         vlc_bool_t b_probe )
00516 {
00517     MMRESULT result;
00518     unsigned int i;
00519 
00520     /* Set sound format */
00521 
00522 #define waveformat p_aout->output.p_sys->waveformat
00523 
00524     waveformat.dwChannelMask = 0;
00525     for( i = 0; i < sizeof(pi_channels_src)/sizeof(uint32_t); i++ )
00526     {
00527         if( i_channels & pi_channels_src[i] )
00528             waveformat.dwChannelMask |= pi_channels_in[i];
00529     }
00530 
00531     switch( i_format )
00532     {
00533     case VLC_FOURCC('s','p','d','i'):
00534         i_nb_channels = 2;
00535         /* To prevent channel re-ordering */
00536         waveformat.dwChannelMask = SPEAKER_FRONT_LEFT | SPEAKER_FRONT_RIGHT;
00537         waveformat.Format.wBitsPerSample = 16;
00538         waveformat.Samples.wValidBitsPerSample =
00539             waveformat.Format.wBitsPerSample;
00540         waveformat.Format.wFormatTag = WAVE_FORMAT_DOLBY_AC3_SPDIF;
00541         waveformat.SubFormat = __KSDATAFORMAT_SUBTYPE_DOLBY_AC3_SPDIF;
00542         break;
00543 
00544     case VLC_FOURCC('f','l','3','2'):
00545         waveformat.Format.wBitsPerSample = sizeof(float) * 8;
00546         waveformat.Samples.wValidBitsPerSample =
00547             waveformat.Format.wBitsPerSample;
00548         waveformat.Format.wFormatTag = WAVE_FORMAT_IEEE_FLOAT;
00549         waveformat.SubFormat = __KSDATAFORMAT_SUBTYPE_IEEE_FLOAT;
00550         break;
00551 
00552     case VLC_FOURCC('s','1','6','l'):
00553         waveformat.Format.wBitsPerSample = 16;
00554         waveformat.Samples.wValidBitsPerSample =
00555             waveformat.Format.wBitsPerSample;
00556         waveformat.Format.wFormatTag = WAVE_FORMAT_PCM;
00557         waveformat.SubFormat = __KSDATAFORMAT_SUBTYPE_PCM;
00558         break;
00559     }
00560 
00561     waveformat.Format.nChannels = i_nb_channels;
00562     waveformat.Format.nSamplesPerSec = i_rate;
00563     waveformat.Format.nBlockAlign =
00564         waveformat.Format.wBitsPerSample / 8 * i_nb_channels;
00565     waveformat.Format.nAvgBytesPerSec =
00566         waveformat.Format.nSamplesPerSec * waveformat.Format.nBlockAlign;
00567 
00568     /* Only use the new WAVE_FORMAT_EXTENSIBLE format for multichannel audio */
00569     if( i_nb_channels <= 2 )
00570     {
00571         waveformat.Format.cbSize = 0;
00572     }
00573     else
00574     {
00575         waveformat.Format.wFormatTag = WAVE_FORMAT_EXTENSIBLE;
00576         waveformat.Format.cbSize =
00577             sizeof(WAVEFORMATEXTENSIBLE) - sizeof(WAVEFORMATEX);
00578     }
00579 
00580     /* Open the device */
00581     result = waveOutOpen( &p_aout->output.p_sys->h_waveout, WAVE_MAPPER,
00582                           (WAVEFORMATEX *)&waveformat,
00583                           (DWORD_PTR)WaveOutCallback, (DWORD_PTR)p_aout,
00584                           CALLBACK_FUNCTION | (b_probe?WAVE_FORMAT_QUERY:0) );
00585     if( result == WAVERR_BADFORMAT )
00586     {
00587         msg_Warn( p_aout, "waveOutOpen failed WAVERR_BADFORMAT" );
00588         return VLC_EGENERIC;
00589     }
00590     if( result == MMSYSERR_ALLOCATED )
00591     {
00592         msg_Warn( p_aout, "waveOutOpen failed WAVERR_ALLOCATED" );
00593         return VLC_EGENERIC;
00594     }
00595     if( result != MMSYSERR_NOERROR )
00596     {
00597         msg_Warn( p_aout, "waveOutOpen failed" );
00598         return VLC_EGENERIC;
00599     }
00600 
00601     p_aout->output.p_sys->b_chan_reorder =
00602         aout_CheckChannelReorder( pi_channels_in, pi_channels_out,
00603                                   waveformat.dwChannelMask, i_nb_channels,
00604                                   p_aout->output.p_sys->pi_chan_table );
00605 
00606     if( p_aout->output.p_sys->b_chan_reorder )
00607     {
00608         msg_Dbg( p_aout, "channel reordering needed" );
00609     }
00610 
00611     return VLC_SUCCESS;
00612 
00613 #undef waveformat
00614 
00615 }
00616 
00617 /*****************************************************************************
00618  * OpenWaveOutPCM: open a PCM waveout sound device
00619  ****************************************************************************/
00620 static int OpenWaveOutPCM( aout_instance_t *p_aout, int *i_format,
00621                            int i_channels, int i_nb_channels, int i_rate,
00622                            vlc_bool_t b_probe )
00623 {
00624     vlc_value_t val;
00625 
00626     var_Get( p_aout, "waveout-float32", &val );
00627 
00628     if( !val.b_bool || OpenWaveOut( p_aout, VLC_FOURCC('f','l','3','2'),
00629                                    i_channels, i_nb_channels, i_rate, b_probe )
00630         != VLC_SUCCESS )
00631     {
00632         if ( OpenWaveOut( p_aout, VLC_FOURCC('s','1','6','l'),
00633                           i_channels, i_nb_channels, i_rate, b_probe )
00634              != VLC_SUCCESS )
00635         {
00636             return VLC_EGENERIC;
00637         }
00638         else
00639         {
00640             *i_format = VLC_FOURCC('s','1','6','l');
00641             return VLC_SUCCESS;
00642         }
00643     }
00644     else
00645     {
00646         *i_format = VLC_FOURCC('f','l','3','2');
00647         return VLC_SUCCESS;
00648     }
00649 }
00650 
00651 /*****************************************************************************
00652  * PlayWaveOut: play a buffer through the WaveOut device
00653  *****************************************************************************/
00654 static int PlayWaveOut( aout_instance_t *p_aout, HWAVEOUT h_waveout,
00655                         WAVEHDR *p_waveheader, aout_buffer_t *p_buffer )
00656 {
00657     MMRESULT result;
00658 
00659     /* Prepare the buffer */
00660     if( p_buffer != NULL )
00661         p_waveheader->lpData = p_buffer->p_buffer;
00662     else
00663         /* Use silence buffer instead */
00664         p_waveheader->lpData = p_aout->output.p_sys->p_silence_buffer;
00665 
00666     p_waveheader->dwUser = p_buffer ? (DWORD_PTR)p_buffer : (DWORD_PTR)1;
00667     p_waveheader->dwBufferLength = p_aout->output.p_sys->i_buffer_size;
00668     p_waveheader->dwFlags = 0;
00669 
00670     result = waveOutPrepareHeader( h_waveout, p_waveheader, sizeof(WAVEHDR) );
00671     if( result != MMSYSERR_NOERROR )
00672     {
00673         msg_Err( p_aout, "waveOutPrepareHeader failed" );
00674         return VLC_EGENERIC;
00675     }
00676 
00677     /* Send the buffer to the waveOut queue */
00678     result = waveOutWrite( h_waveout, p_waveheader, sizeof(WAVEHDR) );
00679     if( result != MMSYSERR_NOERROR )
00680     {
00681         msg_Err( p_aout, "waveOutWrite failed" );
00682         return VLC_EGENERIC;
00683     }
00684 
00685     return VLC_SUCCESS;
00686 }
00687 
00688 /*****************************************************************************
00689  * WaveOutCallback: what to do once WaveOut has played its sound samples
00690  *****************************************************************************/
00691 static void CALLBACK WaveOutCallback( HWAVEOUT h_waveout, UINT uMsg,
00692                                       DWORD _p_aout,
00693                                       DWORD dwParam1, DWORD dwParam2 )
00694 {
00695     aout_instance_t *p_aout = (aout_instance_t *)_p_aout;
00696     int i, i_queued_frames = 0;
00697 
00698     if( uMsg != WOM_DONE ) return;
00699 
00700     if( p_aout->b_die ) return;
00701 
00702     /* Find out the current latency */
00703     for( i = 0; i < FRAMES_NUM; i++ )
00704     {
00705         /* Check if frame buf is available */
00706         if( !(p_aout->output.p_sys->waveheader[i].dwFlags & WHDR_DONE) )
00707         {
00708             i_queued_frames++;
00709         }
00710     }
00711 
00712     /* Don't wake up the thread too much */
00713     if( i_queued_frames < FRAMES_NUM / 2 )
00714         SetEvent( p_aout->output.p_sys->event );
00715 }
00716 
00717 /*****************************************************************************
00718  * WaveOutThread: this thread will capture play notification events.
00719  *****************************************************************************
00720  * We use this thread to feed new audio samples to the sound card because
00721  * we are not authorized to use waveOutWrite() directly in the waveout
00722  * callback.
00723  *****************************************************************************/
00724 static void WaveOutThread( notification_thread_t *p_notif )
00725 {
00726     aout_instance_t *p_aout = p_notif->p_aout;
00727     aout_sys_t *p_sys = p_aout->output.p_sys;
00728     aout_buffer_t *p_buffer = NULL;
00729     WAVEHDR *p_waveheader = p_sys->waveheader;
00730     int i, i_queued_frames;
00731     vlc_bool_t b_sleek;
00732 
00733     /* We don't want any resampling when using S/PDIF */
00734     b_sleek = p_aout->output.output.i_format == VLC_FOURCC('s','p','d','i');
00735 
00736     while( 1 )
00737     {
00738         WaitForSingleObject( p_sys->event, INFINITE );
00739 
00740         /* Cleanup and find out the current latency */
00741         i_queued_frames = 0;
00742         for( i = 0; i < FRAMES_NUM; i++ )
00743         {
00744             if( (p_waveheader[i].dwFlags & WHDR_DONE) &&
00745                 p_waveheader[i].dwUser )
00746             {
00747                 /* Unprepare and free the buffers which has just been played */
00748                 waveOutUnprepareHeader( p_sys->h_waveout, &p_waveheader[i],
00749                                         sizeof(WAVEHDR) );
00750 
00751                 if( p_waveheader[i].dwUser != 1 )
00752                     aout_BufferFree( (aout_buffer_t *)p_waveheader[i].dwUser );
00753 
00754                 p_waveheader[i].dwUser = 0;
00755             }
00756 
00757             /* Check if frame buf is available */
00758             if( !(p_waveheader[i].dwFlags & WHDR_DONE) )
00759             {
00760                 i_queued_frames++;
00761             }
00762         }
00763 
00764         if( p_aout->b_die ) return;
00765 
00766         /* Try to fill in as many frame buffers as possible */
00767         for( i = 0; i < FRAMES_NUM; i++ )
00768         {
00769             /* Check if frame buf is available */
00770             if( p_waveheader[i].dwFlags & WHDR_DONE )
00771             {
00772                 /* Take into account the latency */
00773                 p_buffer = aout_OutputNextBuffer( p_aout,
00774                     mdate() + 1000000 * i_queued_frames /
00775                     p_aout->output.output.i_rate * p_aout->output.i_nb_samples,
00776                     b_sleek );
00777 
00778                 if( !p_buffer && i_queued_frames )
00779                 {
00780                     /* We aren't late so no need to play a blank sample */
00781                     break;
00782                 }
00783 
00784                 /* Do the channel reordering */
00785                 if( p_buffer && p_sys->b_chan_reorder )
00786                 {
00787                     aout_ChannelReorder( p_buffer->p_buffer,
00788                         p_buffer->i_nb_bytes,
00789                         p_sys->waveformat.Format.nChannels,
00790                         p_sys->pi_chan_table,
00791                         p_sys->waveformat.Format.wBitsPerSample );
00792                 }
00793 
00794                 PlayWaveOut( p_aout, p_sys->h_waveout,
00795                              &p_waveheader[i], p_buffer );
00796 
00797                 i_queued_frames++;
00798             }
00799         }
00800     }
00801 }
00802 
00803 static int VolumeInfos( aout_instance_t * p_aout, audio_volume_t * pi_soft )
00804 {
00805     *pi_soft = AOUT_VOLUME_MAX / 2;
00806     return 0;
00807 }
00808 
00809 static int VolumeGet( aout_instance_t * p_aout, audio_volume_t * pi_volume )
00810 {
00811     DWORD i_waveout_vol;
00812 
00813 #ifdef UNDER_CE
00814     waveOutGetVolume( 0, &i_waveout_vol );
00815 #else
00816     waveOutGetVolume( p_aout->output.p_sys->h_waveout, &i_waveout_vol );
00817 #endif
00818 
00819     i_waveout_vol &= 0xFFFF;
00820     *pi_volume = p_aout->output.i_volume =
00821         (i_waveout_vol * AOUT_VOLUME_MAX + 0xFFFF /*rounding*/) / 2 / 0xFFFF;
00822     return 0;
00823 }
00824 
00825 static int VolumeSet( aout_instance_t * p_aout, audio_volume_t i_volume )
00826 {
00827     unsigned long i_waveout_vol = i_volume * 0xFFFF * 2 / AOUT_VOLUME_MAX;
00828     i_waveout_vol |= (i_waveout_vol << 16);
00829 
00830 #ifdef UNDER_CE
00831     waveOutSetVolume( 0, i_waveout_vol );
00832 #else
00833     waveOutSetVolume( p_aout->output.p_sys->h_waveout, i_waveout_vol );
00834 #endif
00835 
00836     p_aout->output.i_volume = i_volume;
00837     return 0;
00838 }