00001 #ifndef PA_WIN_WMME_H 00002 #define PA_WIN_WMME_H 00003 /* 00004 * $Id: pa_win_wmme.h 1115 2006-09-06 15:39:48Z 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 00046 #include "portaudio.h" 00047 00048 #ifdef __cplusplus 00049 extern "C" 00050 { 00051 #endif /* __cplusplus */ 00052 00053 00054 #define paWinMmeUseLowLevelLatencyParameters (0x01) 00055 #define paWinMmeUseMultipleDevices (0x02) /* use mme specific multiple device feature */ 00056 00057 00058 /* By default, the mme implementation drops the processing thread's priority 00059 to THREAD_PRIORITY_NORMAL and sleeps the thread if the CPU load exceeds 100% 00060 This flag disables any priority throttling. The processing thread will always 00061 run at THREAD_PRIORITY_TIME_CRITICAL. 00062 */ 00063 #define paWinMmeDontThrottleOverloadedProcessingThread (0x08) 00064 00065 00066 typedef struct PaWinMmeDeviceAndChannelCount{ 00067 PaDeviceIndex device; 00068 int channelCount; 00069 }PaWinMmeDeviceAndChannelCount; 00070 00071 00072 typedef struct PaWinMmeStreamInfo{ 00073 unsigned long size; 00074 PaHostApiTypeId hostApiType; 00075 unsigned long version; 00077 unsigned long flags; 00078 00079 /* low-level latency setting support 00080 These settings control the number and size of host buffers in order 00081 to set latency. They will be used instead of the generic parameters 00082 to Pa_OpenStream() if flags contains the PaWinMmeUseLowLevelLatencyParameters 00083 flag. 00084 00085 If PaWinMmeStreamInfo structures with PaWinMmeUseLowLevelLatencyParameters 00086 are supplied for both input and output in a full duplex stream, then the 00087 input and output framesPerBuffer must be the same, or the larger of the 00088 two must be a multiple of the smaller, otherwise a 00089 paIncompatibleHostApiSpecificStreamInfo error will be returned from 00090 Pa_OpenStream(). 00091 */ 00092 unsigned long framesPerBuffer; 00093 unsigned long bufferCount; /* formerly numBuffers */ 00094 00095 /* multiple devices per direction support 00096 If flags contains the PaWinMmeUseMultipleDevices flag, 00097 this functionality will be used, otherwise the device parameter to 00098 Pa_OpenStream() will be used instead. 00099 If devices are specified here, the corresponding device parameter 00100 to Pa_OpenStream() should be set to paUseHostApiSpecificDeviceSpecification, 00101 otherwise an paInvalidDevice error will result. 00102 The total number of channels accross all specified devices 00103 must agree with the corresponding channelCount parameter to 00104 Pa_OpenStream() otherwise a paInvalidChannelCount error will result. 00105 */ 00106 PaWinMmeDeviceAndChannelCount *devices; 00107 unsigned long deviceCount; 00108 00109 }PaWinMmeStreamInfo; 00110 00111 00121 int PaWinMME_GetStreamInputHandleCount( PaStream* stream ); 00122 00123 00134 HWAVEIN PaWinMME_GetStreamInputHandle( PaStream* stream, int handleIndex ); 00135 00136 00146 int PaWinMME_GetStreamOutputHandleCount( PaStream* stream ); 00147 00148 00159 HWAVEOUT PaWinMME_GetStreamOutputHandle( PaStream* stream, int handleIndex ); 00160 00161 00162 #ifdef __cplusplus 00163 } 00164 #endif /* __cplusplus */ 00165 00166 #endif /* PA_WIN_WMME_H */