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1 #ifndef PA_WIN_DS_H
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2 #define PA_WIN_DS_H
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3 /*
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4 * $Id: $
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5 * PortAudio Portable Real-Time Audio Library
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6 * DirectSound specific extensions
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7 *
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8 * Copyright (c) 1999-2007 Ross Bencina and Phil Burk
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9 *
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10 * Permission is hereby granted, free of charge, to any person obtaining
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11 * a copy of this software and associated documentation files
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12 * (the "Software"), to deal in the Software without restriction,
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13 * including without limitation the rights to use, copy, modify, merge,
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14 * publish, distribute, sublicense, and/or sell copies of the Software,
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15 * and to permit persons to whom the Software is furnished to do so,
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16 * subject to the following conditions:
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17 *
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18 * The above copyright notice and this permission notice shall be
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19 * included in all copies or substantial portions of the Software.
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20 *
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21 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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22 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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23 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
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24 * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR
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25 * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF
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26 * CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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27 * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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28 */
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29
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30 /*
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31 * The text above constitutes the entire PortAudio license; however,
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32 * the PortAudio community also makes the following non-binding requests:
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33 *
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34 * Any person wishing to distribute modifications to the Software is
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35 * requested to send the modifications to the original developer so that
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36 * they can be incorporated into the canonical version. It is also
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37 * requested that these non-binding requests be included along with the
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38 * license above.
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39 */
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40
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41 /** @file
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42 @ingroup public_header
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43 @brief DirectSound-specific PortAudio API extension header file.
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44 */
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45
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46 #include "portaudio.h"
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47 #include "pa_win_waveformat.h"
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48
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49 #ifdef __cplusplus
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50 extern "C"
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51 {
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52 #endif /* __cplusplus */
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53
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54
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55 #define paWinDirectSoundUseLowLevelLatencyParameters (0x01)
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56 #define paWinDirectSoundUseChannelMask (0x04)
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57
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58
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59 typedef struct PaWinDirectSoundStreamInfo{
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60 unsigned long size; /**< sizeof(PaWinDirectSoundStreamInfo) */
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61 PaHostApiTypeId hostApiType; /**< paDirectSound */
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62 unsigned long version; /**< 2 */
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63
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64 unsigned long flags;
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65
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66 /* low-level latency setting support
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67 Control the size of host buffers in order to set latency. They will
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68 be used instead of the generic parameters to Pa_OpenStream() if
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69 flags contains the paWinDirectSoundUseLowLevelLatencyParameters
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70 flag.
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71
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72 If PaWinDirectSoundStreamInfo structures with paWinDirectSoundUseLowLevelLatencyParameters
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73 are supplied for both input and output in a full duplex stream, then the
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74 input and output framesPerBuffer must be the same, or the larger of the
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75 two must be a multiple of the smaller, otherwise a
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76 paIncompatibleHostApiSpecificStreamInfo error will be returned from
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77 Pa_OpenStream().
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78 */
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79 unsigned long framesPerBuffer; /* NOT IMPLEMENTED see http://www.portaudio.com/trac/ticket/129 */
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80
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81 /*
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82 support for WAVEFORMATEXTENSIBLE channel masks. If flags contains
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83 paWinDirectSoundUseChannelMask this allows you to specify which speakers
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84 to address in a multichannel stream. Constants for channelMask
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85 are specified in pa_win_waveformat.h
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86
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87 */
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88 PaWinWaveFormatChannelMask channelMask;
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89
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90 }PaWinDirectSoundStreamInfo;
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91
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92
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93
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94 #ifdef __cplusplus
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95 }
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96 #endif /* __cplusplus */
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97
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98 #endif /* PA_WIN_DS_H */
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