mirror of
https://github.com/mattingalls/Soundflower.git
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76 lines
3.4 KiB
C++
Executable File
76 lines
3.4 KiB
C++
Executable File
/*
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File:SoundflowerClip.cpp
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Version: 1.0.1, ma++ ingalls
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Copyright (c) 2004 Cycling '74
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Permission is hereby granted, free of charge, to any person obtaining a copy
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of this software and associated documentation files (the "Software"), to deal
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in the Software without restriction, including without limitation the rights
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to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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copies of the Software, and to permit persons to whom the Software is
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furnished to do so, subject to the following conditions:
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The above copyright notice and this permission notice shall be included in
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all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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THE SOFTWARE.
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*/
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#include "SoundflowerEngine.h"
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#include <IOKit/IOLib.h>
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// here, instead of clipping, we save the buffer
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IOReturn SoundflowerEngine::clipOutputSamples(const void *mixBuf, void *sampleBuf, UInt32 firstSampleFrame, UInt32 numSampleFrames, const IOAudioStreamFormat *streamFormat, IOAudioStream *audioStream)
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{
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UInt32 channelCount = streamFormat->fNumChannels;
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UInt32 offset = firstSampleFrame * channelCount;
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UInt32 byteOffset = offset * sizeof(float);
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UInt32 numBytes = numSampleFrames * channelCount * sizeof(float);
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if (((SoundflowerDevice *)audioDevice)->mMuteIn[0])
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memset((UInt8 *)thruBuffer + byteOffset, 0, numBytes);
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else {
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memcpy((UInt8 *)thruBuffer + byteOffset, (UInt8 *)mixBuf + byteOffset, numBytes);
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float masterGain = ((SoundflowerDevice *)audioDevice)->mGain[0]/(float)SoundflowerDevice::kGainMax;
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float masterVolume = ((SoundflowerDevice *)audioDevice)->mVolume[0]/(float)SoundflowerDevice::kVolumeMax;
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for(UInt32 channelBufferIterator = 0; channelBufferIterator < numSampleFrames; channelBufferIterator++)
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for(UInt32 channel = 0; channel < channelCount; channel++) {
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float channelGain = ((SoundflowerDevice *)audioDevice)->mGain[channel+1]/(float)SoundflowerDevice::kGainMax;
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float channelVolume = ((SoundflowerDevice *)audioDevice)->mVolume[channel+1]/(float)SoundflowerDevice::kVolumeMax;
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thruBuffer[offset + channelBufferIterator*channelCount + channel] *= masterVolume * channelVolume * masterGain * channelGain;
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}
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}
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return kIOReturnSuccess;
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}
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// This is called when client apps need input audio. Here we give them saved audio from the clip routine.
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IOReturn SoundflowerEngine::convertInputSamples(const void *sampleBuf, void *destBuf, UInt32 firstSampleFrame, UInt32 numSampleFrames, const IOAudioStreamFormat *streamFormat, IOAudioStream *audioStream)
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{
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UInt32 offset;
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UInt32 frameSize = streamFormat->fNumChannels * sizeof(float);
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offset = firstSampleFrame * frameSize;
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if (((SoundflowerDevice *)audioDevice)->mMuteOut[0])
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memset((UInt8 *)destBuf, 0, numSampleFrames * frameSize);
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else
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memcpy((UInt8 *)destBuf, (UInt8 *)thruBuffer + offset, numSampleFrames * frameSize);
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return kIOReturnSuccess;
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}
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