dlls/mmdevapi/mmdevapi.h

   1 /*
   2  * Copyright 2009 Maarten Lankhorst
   3  *
   4  * This library is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU Lesser General Public
   6  * License as published by the Free Software Foundation; either
   7  * version 2.1 of the License, or (at your option) any later version.
   8  *
   9  * This library is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12  * Lesser General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU Lesser General Public
  15  * License along with this library; if not, write to the Free Software
  16  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  17  */
  18
  19 extern HRESULT MMDevEnum_Create(REFIID riid, void **ppv) DECLSPEC_HIDDEN;
  20 extern void MMDevEnum_Free(void) DECLSPEC_HIDDEN;
  21
  22
  23 /* Changes to this enum must be synced in drivers. */
  24 enum _DriverPriority {
  25     Priority_Unavailable = 0, /* driver won't work */
  26     Priority_Low, /* driver may work, but unlikely */
  27     Priority_Neutral, /* driver makes no judgment */
  28     Priority_Preferred /* driver thinks it's correct */
  29 };
  30
  31 typedef struct _DriverFuncs {
  32     HMODULE module;
  33     WCHAR module_name[64];
  34     int priority;
  35
  36     /* Returns a "priority" value for the driver. Highest priority wins.
  37      * If multiple drivers think they are valid, they will return a
  38      * priority value reflecting the likelihood that they are actually
  39      * valid. See enum _DriverPriority. */
  40     int (WINAPI *pGetPriority)(void);
  41
  42     /* ids gets an array of human-friendly endpoint names
  43      * keys gets an array of driver-specific stuff that is used
  44      *   in GetAudioEndpoint to identify the endpoint
  45      * it is the caller's responsibility to free both arrays, and
  46      *   all of the elements in both arrays with HeapFree() */
  47     HRESULT (WINAPI *pGetEndpointIDs)(EDataFlow flow, WCHAR ***ids,
  48             GUID **guids, UINT *num, UINT *default_index);
  49     HRESULT (WINAPI *pGetAudioEndpoint)(void *key, IMMDevice *dev,
  50             IAudioClient **out);
  51     HRESULT (WINAPI *pGetAudioSessionManager)(IMMDevice *device,
  52             IAudioSessionManager2 **out);
  53     HRESULT (WINAPI *pGetPropValue)(GUID *guid,
  54             const PROPERTYKEY *prop, PROPVARIANT *out);
  55 } DriverFuncs;
  56
  57 extern DriverFuncs drvs DECLSPEC_HIDDEN;
  58
  59 typedef struct MMDevice {
  60     IMMDevice IMMDevice_iface;
  61     IMMEndpoint IMMEndpoint_iface;
  62     LONG ref;
  63
  64     CRITICAL_SECTION crst;
  65
  66     EDataFlow flow;
  67     DWORD state;
  68     GUID devguid;
  69     WCHAR *drv_id;
  70 } MMDevice;
  71
  72 extern HRESULT AudioClient_Create(MMDevice *parent, IAudioClient **ppv) DECLSPEC_HIDDEN;
  73 extern HRESULT AudioEndpointVolume_Create(MMDevice *parent, IAudioEndpointVolumeEx **ppv) DECLSPEC_HIDDEN;
  74
  75 extern const WCHAR drv_keyW[] DECLSPEC_HIDDEN;