00001 #ifndef PA_WIN_WMME_H 00002 #define PA_WIN_WMME_H 00003 /* 00004 * $Id: pa_win_wmme.h 1405 2009-03-08 08:10:55Z rossb $ 00005 * PortAudio Portable Real-Time Audio Library 00006 * MME specific extensions 00007 * 00008 * Copyright (c) 1999-2000 Ross Bencina and Phil Burk 00009 * 00010 * Permission is hereby granted, free of charge, to any person obtaining 00011 * a copy of this software and associated documentation files 00012 * (the "Software"), to deal in the Software without restriction, 00013 * including without limitation the rights to use, copy, modify, merge, 00014 * publish, distribute, sublicense, and/or sell copies of the Software, 00015 * and to permit persons to whom the Software is furnished to do so, 00016 * subject to the following conditions: 00017 * 00018 * The above copyright notice and this permission notice shall be 00019 * included in all copies or substantial portions of the Software. 00020 * 00021 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 00022 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 00023 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. 00024 * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR 00025 * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF 00026 * CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION 00027 * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. 00028 */ 00029 00030 /* 00031 * The text above constitutes the entire PortAudio license; however, 00032 * the PortAudio community also makes the following non-binding requests: 00033 * 00034 * Any person wishing to distribute modifications to the Software is 00035 * requested to send the modifications to the original developer so that 00036 * they can be incorporated into the canonical version. It is also 00037 * requested that these non-binding requests be included along with the 00038 * license above. 00039 */ 00040 00047 #include "portaudio.h" 00048 #include "pa_win_waveformat.h" 00049 00050 #ifdef __cplusplus 00051 extern "C" 00052 { 00053 #endif /* __cplusplus */ 00054 00055 00056 /* The following are flags which can be set in 00057 PaWinMmeStreamInfo's flags field. 00058 */ 00059 00060 #define paWinMmeUseLowLevelLatencyParameters (0x01) 00061 #define paWinMmeUseMultipleDevices (0x02) /* use mme specific multiple device feature */ 00062 #define paWinMmeUseChannelMask (0x04) 00063 00064 /* By default, the mme implementation drops the processing thread's priority 00065 to THREAD_PRIORITY_NORMAL and sleeps the thread if the CPU load exceeds 100% 00066 This flag disables any priority throttling. The processing thread will always 00067 run at THREAD_PRIORITY_TIME_CRITICAL. 00068 */ 00069 #define paWinMmeDontThrottleOverloadedProcessingThread (0x08) 00070 00071 /* Flags for non-PCM spdif passthrough. 00072 */ 00073 #define paWinMmeWaveFormatDolbyAc3Spdif (0x10) 00074 #define paWinMmeWaveFormatWmaSpdif (0x20) 00075 00076 00077 typedef struct PaWinMmeDeviceAndChannelCount{ 00078 PaDeviceIndex device; 00079 int channelCount; 00080 }PaWinMmeDeviceAndChannelCount; 00081 00082 00083 typedef struct PaWinMmeStreamInfo{ 00084 unsigned long size; 00085 PaHostApiTypeId hostApiType; 00086 unsigned long version; 00088 unsigned long flags; 00089 00090 /* low-level latency setting support 00091 These settings control the number and size of host buffers in order 00092 to set latency. They will be used instead of the generic parameters 00093 to Pa_OpenStream() if flags contains the PaWinMmeUseLowLevelLatencyParameters 00094 flag. 00095 00096 If PaWinMmeStreamInfo structures with PaWinMmeUseLowLevelLatencyParameters 00097 are supplied for both input and output in a full duplex stream, then the 00098 input and output framesPerBuffer must be the same, or the larger of the 00099 two must be a multiple of the smaller, otherwise a 00100 paIncompatibleHostApiSpecificStreamInfo error will be returned from 00101 Pa_OpenStream(). 00102 */ 00103 unsigned long framesPerBuffer; 00104 unsigned long bufferCount; /* formerly numBuffers */ 00105 00106 /* multiple devices per direction support 00107 If flags contains the PaWinMmeUseMultipleDevices flag, 00108 this functionality will be used, otherwise the device parameter to 00109 Pa_OpenStream() will be used instead. 00110 If devices are specified here, the corresponding device parameter 00111 to Pa_OpenStream() should be set to paUseHostApiSpecificDeviceSpecification, 00112 otherwise an paInvalidDevice error will result. 00113 The total number of channels accross all specified devices 00114 must agree with the corresponding channelCount parameter to 00115 Pa_OpenStream() otherwise a paInvalidChannelCount error will result. 00116 */ 00117 PaWinMmeDeviceAndChannelCount *devices; 00118 unsigned long deviceCount; 00119 00120 /* 00121 support for WAVEFORMATEXTENSIBLE channel masks. If flags contains 00122 paWinMmeUseChannelMask this allows you to specify which speakers 00123 to address in a multichannel stream. Constants for channelMask 00124 are specified in pa_win_waveformat.h 00125 00126 */ 00127 PaWinWaveFormatChannelMask channelMask; 00128 00129 }PaWinMmeStreamInfo; 00130 00131 00141 int PaWinMME_GetStreamInputHandleCount( PaStream* stream ); 00142 00143 00154 HWAVEIN PaWinMME_GetStreamInputHandle( PaStream* stream, int handleIndex ); 00155 00156 00166 int PaWinMME_GetStreamOutputHandleCount( PaStream* stream ); 00167 00168 00179 HWAVEOUT PaWinMME_GetStreamOutputHandle( PaStream* stream, int handleIndex ); 00180 00181 00182 #ifdef __cplusplus 00183 } 00184 #endif /* __cplusplus */ 00185 00186 #endif /* PA_WIN_WMME_H */