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1 #ifndef PA_WIN_WASAPI_H
2 #define PA_WIN_WASAPI_H
3 /*
4 * $Id: $
5 * PortAudio Portable Real-Time Audio Library
6 * DirectSound specific extensions
7 *
8 * Copyright (c) 1999-2007 Ross Bencina and Phil Burk
9 *
10 * Permission is hereby granted, free of charge, to any person obtaining
11 * a copy of this software and associated documentation files
12 * (the "Software"), to deal in the Software without restriction,
13 * including without limitation the rights to use, copy, modify, merge,
14 * publish, distribute, sublicense, and/or sell copies of the Software,
15 * and to permit persons to whom the Software is furnished to do so,
16 * subject to the following conditions:
17 *
18 * The above copyright notice and this permission notice shall be
19 * included in all copies or substantial portions of the Software.
20 *
21 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
22 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
23 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
24 * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR
25 * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF
26 * CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
27 * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
28 */
29
30 /*
31 * The text above constitutes the entire PortAudio license; however,
32 * the PortAudio community also makes the following non-binding requests:
33 *
34 * Any person wishing to distribute modifications to the Software is
35 * requested to send the modifications to the original developer so that
36 * they can be incorporated into the canonical version. It is also
37 * requested that these non-binding requests be included along with the
38 * license above.
39 */
40
41 /** @file
42 @ingroup public_header
43 @brief WASAPI-specific PortAudio API extension header file.
44 */
45
46 #include "portaudio.h"
47 #include "pa_win_waveformat.h"
48
49 #ifdef __cplusplus
50 extern "C"
51 {
52 #endif /* __cplusplus */
53
54
55 /* Setup flags */
56 typedef enum PaWasapiFlags
57 {
58 /* puts WASAPI into exclusive mode */
59 paWinWasapiExclusive = (1 << 0),
60
61 /* allows to skip internal PA processing completely */
62 paWinWasapiRedirectHostProcessor = (1 << 1),
63
64 /* assigns custom channel mask */
65 paWinWasapiUseChannelMask = (1 << 2),
66
67 /* selects non-Event driven method of data read/write
68 Note: WASAPI Event driven core is capable of 2ms latency!!!, but Polling
69 method can only provide 15-20ms latency. */
70 paWinWasapiPolling = (1 << 3),
71
72 /* forces custom thread priority setting. must be used if PaWasapiStreamInfo::threadPriority
73 is set to custom value. */
74 paWinWasapiThreadPriority = (1 << 4)
75 }
76 PaWasapiFlags;
77 #define paWinWasapiExclusive (paWinWasapiExclusive)
78 #define paWinWasapiRedirectHostProcessor (paWinWasapiRedirectHostProcessor)
79 #define paWinWasapiUseChannelMask (paWinWasapiUseChannelMask)
80 #define paWinWasapiPolling (paWinWasapiPolling)
81 #define paWinWasapiThreadPriority (paWinWasapiThreadPriority)
82
83
84 /* Host processor. Allows to skip internal PA processing completely.
85 You must set paWinWasapiRedirectHostProcessor flag to PaWasapiStreamInfo::flags member
86 in order to have host processor redirected to your callback.
87 Use with caution! inputFrames and outputFrames depend solely on final device setup.
88 To query maximal values of inputFrames/outputFrames use PaWasapi_GetFramesPerHostBuffer.
89 */
90 typedef void (*PaWasapiHostProcessorCallback) (void *inputBuffer, long inputFrames,
91 void *outputBuffer, long outputFrames,
92 void *userData);
93
94 /* Device role */
95 typedef enum PaWasapiDeviceRole
96 {
97 eRoleRemoteNetworkDevice = 0,
98 eRoleSpeakers,
99 eRoleLineLevel,
100 eRoleHeadphones,
101 eRoleMicrophone,
102 eRoleHeadset,
103 eRoleHandset,
104 eRoleUnknownDigitalPassthrough,
105 eRoleSPDIF,
106 eRoleHDMI,
107 eRoleUnknownFormFactor
108 }
109 PaWasapiDeviceRole;
110
111
112 /* Jack connection type */
113 typedef enum PaWasapiJackConnectionType
114 {
115 eJackConnTypeUnknown,
116 eJackConnType3Point5mm,
117 eJackConnTypeQuarter,
118 eJackConnTypeAtapiInternal,
119 eJackConnTypeRCA,
120 eJackConnTypeOptical,
121 eJackConnTypeOtherDigital,
122 eJackConnTypeOtherAnalog,
123 eJackConnTypeMultichannelAnalogDIN,
124 eJackConnTypeXlrProfessional,
125 eJackConnTypeRJ11Modem,
126 eJackConnTypeCombination
127 }
128 PaWasapiJackConnectionType;
129
130
131 /* Jack geometric location */
132 typedef enum PaWasapiJackGeoLocation
133 {
134 eJackGeoLocUnk = 0,
135 eJackGeoLocRear = 0x1, /* matches EPcxGeoLocation::eGeoLocRear */
136 eJackGeoLocFront,
137 eJackGeoLocLeft,
138 eJackGeoLocRight,
139 eJackGeoLocTop,
140 eJackGeoLocBottom,
141 eJackGeoLocRearPanel,
142 eJackGeoLocRiser,
143 eJackGeoLocInsideMobileLid,
144 eJackGeoLocDrivebay,
145 eJackGeoLocHDMI,
146 eJackGeoLocOutsideMobileLid,
147 eJackGeoLocATAPI,
148 eJackGeoLocReserved5,
149 eJackGeoLocReserved6,
150 }
151 PaWasapiJackGeoLocation;
152
153
154 /* Jack general location */
155 typedef enum PaWasapiJackGenLocation
156 {
157 eJackGenLocPrimaryBox = 0,
158 eJackGenLocInternal,
159 eJackGenLocSeparate,
160 eJackGenLocOther
161 }
162 PaWasapiJackGenLocation;
163
164
165 /* Jack's type of port */
166 typedef enum PaWasapiJackPortConnection
167 {
168 eJackPortConnJack = 0,
169 eJackPortConnIntegratedDevice,
170 eJackPortConnBothIntegratedAndJack,
171 eJackPortConnUnknown
172 }
173 PaWasapiJackPortConnection;
174
175
176 /* Thread priority */
177 typedef enum PaWasapiThreadPriority
178 {
179 eThreadPriorityNone = 0,
180 eThreadPriorityAudio, //!< Default for Shared mode.
181 eThreadPriorityCapture,
182 eThreadPriorityDistribution,
183 eThreadPriorityGames,
184 eThreadPriorityPlayback,
185 eThreadPriorityProAudio, //!< Default for Exclusive mode.
186 eThreadPriorityWindowManager
187 }
188 PaWasapiThreadPriority;
189
190
191 /* Stream descriptor. */
192 typedef struct PaWasapiJackDescription
193 {
194 unsigned long channelMapping;
195 unsigned long color; /* derived from macro: #define RGB(r,g,b) ((COLORREF)(((BYTE)(r)|((WORD)((BYTE)(g))<<8))|(((DWORD)(BYTE)(b))<<16))) */
196 PaWasapiJackConnectionType connectionType;
197 PaWasapiJackGeoLocation geoLocation;
198 PaWasapiJackGenLocation genLocation;
199 PaWasapiJackPortConnection portConnection;
200 unsigned int isConnected;
201 }
202 PaWasapiJackDescription;
203
204
205 /* Stream descriptor. */
206 typedef struct PaWasapiStreamInfo
207 {
208 unsigned long size; /**< sizeof(PaWasapiStreamInfo) */
209 PaHostApiTypeId hostApiType; /**< paWASAPI */
210 unsigned long version; /**< 1 */
211
212 unsigned long flags; /**< collection of PaWasapiFlags */
213
214 /* Support for WAVEFORMATEXTENSIBLE channel masks. If flags contains
215 paWinWasapiUseChannelMask this allows you to specify which speakers
216 to address in a multichannel stream. Constants for channelMask
217 are specified in pa_win_waveformat.h. Will be used only if
218 paWinWasapiUseChannelMask flag is specified.
219 */
220 PaWinWaveFormatChannelMask channelMask;
221
222 /* Delivers raw data to callback obtained from GetBuffer() methods skipping
223 internal PortAudio processing inventory completely. userData parameter will
224 be the same that was passed to Pa_OpenStream method. Will be used only if
225 paWinWasapiRedirectHostProcessor flag is specified.
226 */
227 PaWasapiHostProcessorCallback hostProcessorOutput;
228 PaWasapiHostProcessorCallback hostProcessorInput;
229
230 /* Specifies thread priority explicitly. Will be used only if paWinWasapiThreadPriority flag
231 is specified.
232
233 Please note, if Input/Output streams are opened simultaniously (Full-Duplex mode)
234 you shall specify same value for threadPriority or othervise one of the values will be used
235 to setup thread priority.
236 */
237 PaWasapiThreadPriority threadPriority;
238 }
239 PaWasapiStreamInfo;
240
241
242 /** Returns default sound format for device. Format is represented by PaWinWaveFormat or
243 WAVEFORMATEXTENSIBLE structure.
244
245 @param pFormat Pointer to PaWinWaveFormat or WAVEFORMATEXTENSIBLE structure.
246 @param nFormatSize Size of PaWinWaveFormat or WAVEFORMATEXTENSIBLE structure in bytes.
247 @param nDevice Device index.
248
249 @return Non-negative value indicating the number of bytes copied into format decriptor
250 or, a PaErrorCode (which are always negative) if PortAudio is not initialized
251 or an error is encountered.
252 */
253 int PaWasapi_GetDeviceDefaultFormat( void *pFormat, unsigned int nFormatSize, PaDeviceIndex nDevice );
254
255
256 /** Returns device role (PaWasapiDeviceRole enum).
257
258 @param nDevice device index.
259
260 @return Non-negative value indicating device role or, a PaErrorCode (which are always negative)
261 if PortAudio is not initialized or an error is encountered.
262 */
263 int/*PaWasapiDeviceRole*/ PaWasapi_GetDeviceRole( PaDeviceIndex nDevice );
264
265
266 /** Boost thread priority of calling thread (MMCSS). Use it for Blocking Interface only for thread
267 which makes calls to Pa_WriteStream/Pa_ReadStream.
268
269 @param hTask Handle to pointer to priority task. Must be used with PaWasapi_RevertThreadPriority
270 method to revert thread priority to initial state.
271
272 @param nPriorityClass Id of thread priority of PaWasapiThreadPriority type. Specifying
273 eThreadPriorityNone does nothing.
274
275 @return Error code indicating success or failure.
276 @see PaWasapi_RevertThreadPriority
277 */
278 PaError PaWasapi_ThreadPriorityBoost( void **hTask, PaWasapiThreadPriority nPriorityClass );
279
280
281 /** Boost thread priority of calling thread (MMCSS). Use it for Blocking Interface only for thread
282 which makes calls to Pa_WriteStream/Pa_ReadStream.
283
284 @param hTask Task handle obtained by PaWasapi_BoostThreadPriority method.
285 @return Error code indicating success or failure.
286 @see PaWasapi_BoostThreadPriority
287 */
288 PaError PaWasapi_ThreadPriorityRevert( void *hTask );
289
290
291 /** Get number of frames per host buffer. This is maximal value of frames of WASAPI buffer which
292 can be locked for operations. Use this method as helper to findout maximal values of
293 inputFrames/outputFrames of PaWasapiHostProcessorCallback.
294
295 @param pStream Pointer to PaStream to query.
296 @param nInput Pointer to variable to receive number of input frames. Can be NULL.
297 @param nOutput Pointer to variable to receive number of output frames. Can be NULL.
298 @return Error code indicating success or failure.
299 @see PaWasapiHostProcessorCallback
300 */
301 PaError PaWasapi_GetFramesPerHostBuffer( PaStream *pStream, unsigned int *nInput, unsigned int *nOutput );
302
303
304 /** Get number of jacks associated with a WASAPI device. Use this method to determine if
305 there are any jacks associated with the provided WASAPI device. Not all audio devices
306 will support this capability. This is valid for both input and output devices.
307 @param nDevice device index.
308 @param jcount Number of jacks is returned in this variable
309 @return Error code indicating success or failure
310 @see PaWasapi_GetJackDescription
311 */
312 PaError PaWasapi_GetJackCount(PaDeviceIndex nDevice, int *jcount);
313
314
315 /** Get the jack description associated with a WASAPI device and jack number
316 Before this function is called, use PaWasapi_GetJackCount to determine the
317 number of jacks associated with device. If jcount is greater than zero, then
318 each jack from 0 to jcount can be queried with this function to get the jack
319 description.
320 @param nDevice device index.
321 @param jindex Which jack to return information
322 @param KSJACK_DESCRIPTION This structure filled in on success.
323 @return Error code indicating success or failure
324 @see PaWasapi_GetJackCount
325 */
326 PaError PaWasapi_GetJackDescription(PaDeviceIndex nDevice, int jindex, PaWasapiJackDescription *pJackDescription);
327
328
329 /*
330 IMPORTANT:
331
332 WASAPI is implemented for Callback and Blocking interfaces. It supports Shared and Exclusive
333 share modes.
334
335 Exclusive Mode:
336
337 Exclusive mode allows to deliver audio data directly to hardware bypassing
338 software mixing.
339 Exclusive mode is specified by 'paWinWasapiExclusive' flag.
340
341 Callback Interface:
342
343 Provides best audio quality with low latency. Callback interface is implemented in
344 two versions:
345
346 1) Event-Driven:
347 This is the most powerful WASAPI implementation which provides glitch-free
348 audio at around 3ms latency in Exclusive mode. Lowest possible latency for this mode is
349 3 ms for HD Audio class audio chips. For the Shared mode latency can not be
350 lower than 20 ms.
351
352 2) Poll-Driven:
353 Polling is another 2-nd method to operate with WASAPI. It is less efficient than Event-Driven
354 and provides latency at around 10-13ms. Polling must be used to overcome a system bug
355 under Windows Vista x64 when application is WOW64(32-bit) and Event-Driven method simply
356 times out (event handle is never signalled on buffer completion). Please note, such WOW64 bug
357 does not exist in Vista x86 or Windows 7.
358 Polling can be setup by speciying 'paWinWasapiPolling' flag. Our WASAPI implementation detects
359 WOW64 bug and sets 'paWinWasapiPolling' automatically.
360
361 Thread priority:
362
363 Normally thread priority is set automatically and does not require modification. Although
364 if user wants some tweaking thread priority can be modified by setting 'paWinWasapiThreadPriority'
365 flag and specifying 'PaWasapiStreamInfo::threadPriority' with value from PaWasapiThreadPriority
366 enum.
367
368 Blocking Interface:
369
370 Blocking interface is implemented but due to above described Poll-Driven method can not
371 deliver lowest possible latency. Specifying too low latency in Shared mode will result in
372 distorted audio although Exclusive mode adds stability.
373
374 Pa_IsFormatSupported:
375
376 To check format with correct Share Mode (Exclusive/Shared) you must supply
377 PaWasapiStreamInfo with flags paWinWasapiExclusive set through member of
378 PaStreamParameters::hostApiSpecificStreamInfo structure.
379
380 Pa_OpenStream:
381
382 To set desired Share Mode (Exclusive/Shared) you must supply
383 PaWasapiStreamInfo with flags paWinWasapiExclusive set through member of
384 PaStreamParameters::hostApiSpecificStreamInfo structure.
385 */
386
387 #ifdef __cplusplus
388 }
389 #endif /* __cplusplus */
390
391 #endif /* PA_WIN_WASAPI_H */

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