mirror of
https://github.com/cookiengineer/audacity
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139 lines
3.9 KiB
C
139 lines
3.9 KiB
C
#ifndef PORT_MIXER_H
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#define PORT_MIXER_H
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#ifdef __cplusplus
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extern "C"
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{
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#endif /* __cplusplus */
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/*
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* PortMixer
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* PortMixer API Header File
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*
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* Copyright (c) 2002, 2006
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*
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* Written by Dominic Mazzoni
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* and Leland Lucius
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*
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* PortMixer is intended to work side-by-side with PortAudio,
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* the Portable Real-Time Audio Library by Ross Bencina and
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* Phil Burk.
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*
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* Permission is hereby granted, free of charge, to any person obtaining
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* a copy of this software and associated documentation files
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* (the "Software"), to deal in the Software without restriction,
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* including without limitation the rights to use, copy, modify, merge,
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* publish, distribute, sublicense, and/or sell copies of the Software,
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* and to permit persons to whom the Software is furnished to do so,
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* subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be
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* included in all copies or substantial portions of the Software.
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*
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* Any person wishing to distribute modifications to the Software is
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* requested to send the modifications to the original developer so that
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* they can be incorporated into the canonical version.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
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* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR
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* ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF
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* CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*
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*/
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#include "portaudio.h"
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typedef void PxMixer;
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typedef float PxVolume; /* 0.0 (min) --> 1.0 (max) */
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typedef float PxBalance; /* -1.0 (left) --> 1.0 (right) */
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/*
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Px_OpenMixer() returns a mixer which will work with the given PortAudio
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audio device. Pass 0 as the index for the first (default) mixer.
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*/
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PxMixer *Px_OpenMixer( void *pa_stream, int i );
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/*
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Px_CloseMixer() closes a mixer opened using Px_OpenMixer and frees any
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memory associated with it.
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*/
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void Px_CloseMixer( PxMixer *mixer );
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/** @brief Px_GetNumMixers returns the number of mixers which could be used
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* with the given PortAudio device.
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*
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* On most systems, there will be only one mixer for each device; however
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* there may be multiple mixers for each device, or possibly multiple mixers
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* which are independent of any particular PortAudio device. */
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int Px_GetNumMixers( PxMixer *mixer );
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const char *Px_GetMixerName( PxMixer *mixer, int i );
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/*
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Master (output) volume
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*/
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PxVolume Px_GetMasterVolume( PxMixer *mixer );
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void Px_SetMasterVolume( PxMixer *mixer, PxVolume volume );
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/*
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Main output volume
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*/
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PxVolume Px_GetPCMOutputVolume( PxMixer *mixer );
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void Px_SetPCMOutputVolume( PxMixer *mixer, PxVolume volume );
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int Px_SupportsPCMOutputVolume( PxMixer* mixer ) ;
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/*
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All output volumes
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*/
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int Px_GetNumOutputVolumes( PxMixer *mixer );
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const char *Px_GetOutputVolumeName( PxMixer *mixer, int i );
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PxVolume Px_GetOutputVolume( PxMixer *mixer, int i );
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void Px_SetOutputVolume( PxMixer *mixer, int i, PxVolume volume );
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/*
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Input source
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*/
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int Px_GetNumInputSources( PxMixer *mixer );
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const char *Px_GetInputSourceName( PxMixer *mixer, int i);
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int Px_GetCurrentInputSource( PxMixer *mixer ); /* may return -1 == none */
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void Px_SetCurrentInputSource( PxMixer *mixer, int i );
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/*
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Input volume
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*/
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PxVolume Px_GetInputVolume( PxMixer *mixer );
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void Px_SetInputVolume( PxMixer *mixer, PxVolume volume );
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/*
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Balance
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*/
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int Px_SupportsOutputBalance( PxMixer *mixer );
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PxBalance Px_GetOutputBalance( PxMixer *mixer );
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void Px_SetOutputBalance( PxMixer *mixer, PxBalance balance );
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/*
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Playthrough
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*/
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int Px_SupportsPlaythrough( PxMixer *mixer );
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PxVolume Px_GetPlaythrough( PxMixer *mixer );
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void Px_SetPlaythrough( PxMixer *mixer, PxVolume volume );
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#ifdef __cplusplus
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}
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#endif /* __cplusplus */
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#endif /* PORT_AUDIO_H */
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