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winecoreaudio: Add AudioUnit_CreateInputUnit to create an input audio unit.

This commit is contained in:
Ken Thomases 2006-12-28 11:05:24 -06:00 committed by Alexandre Julliard
parent 8ba3daaf5c
commit 30a1b29351
1 changed files with 133 additions and 0 deletions
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133
dlls/winmm/winecoreaudio/audiounit.c
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@ -33,6 +33,13 @@ extern OSStatus CoreAudio_woAudioUnitIOProc(void *inRefCon,
UInt32 inNumberFrames,
AudioBufferList *ioData);
extern OSStatus CoreAudio_wiAudioUnitIOProc(void *inRefCon,
AudioUnitRenderActionFlags *ioActionFlags,
const AudioTimeStamp *inTimeStamp,
UInt32 inBusNumber,
UInt32 inNumberFrames,
AudioBufferList *ioData);
int AudioUnit_CreateDefaultAudioUnit(void *wwo, AudioUnit *au)
{
OSStatus err;
@ -121,4 +128,130 @@ int AudioUnit_GetVolume(AudioUnit au, float *left, float *right)
*right = *left;
return 1;
}
int AudioUnit_CreateInputUnit(void* wwi, AudioUnit* out_au,
WORD nChannels, DWORD nSamplesPerSec, WORD wBitsPerSample)
{
OSStatus err = noErr;
ComponentDescription description;
Component component;
AudioUnit au;
UInt32 param;
AURenderCallbackStruct callback;
AudioDeviceID defaultInputDevice;
AudioStreamBasicDescription desiredFormat;
/* Open the AudioOutputUnit */
description.componentType = kAudioUnitType_Output;
description.componentSubType = kAudioUnitSubType_HALOutput;
description.componentManufacturer = kAudioUnitManufacturer_Apple;
description.componentFlags = 0;
description.componentFlagsMask = 0;
component = FindNextComponent(NULL, &description);
if (!component)
{
ERR("FindNextComponent(kAudioUnitSubType_HALOutput) failed\n");
return 0;
}
err = OpenAComponent(component, &au);
if (err != noErr || au == NULL)
{
ERR("OpenAComponent failed: %08lx\n", err);
return 0;
}
/* Configure the AudioOutputUnit */
/* The AUHAL has two buses (AKA elements). Bus 0 is output from the app
* to the device. Bus 1 is input from the device to the app. Each bus
* has two ends (AKA scopes). Data goes from the input scope to the
* output scope. The terminology is somewhat confusing because the terms
* "input" and "output" have two meanings. Here's a summary:
*
* Bus 0, input scope: refers to the source of data to be output as sound
* Bus 0, output scope: refers to the actual sound output device
* Bus 1, input scope: refers to the actual sound input device
* Bus 1, output scope: refers to the destination of data received by the input device
*/
/* Enable input on the AUHAL */
param = 1;
err = AudioUnitSetProperty(au, kAudioOutputUnitProperty_EnableIO, kAudioUnitScope_Input, 1, &param, sizeof(param));
if (err != noErr)
{
ERR("Couldn't enable input on AUHAL: %08lx\n", err);
goto error;
}
/* Disable Output on the AUHAL */
param = 0;
err = AudioUnitSetProperty(au, kAudioOutputUnitProperty_EnableIO, kAudioUnitScope_Output, 0, &param, sizeof(param));
if (err != noErr)
{
ERR("Couldn't disable output on AUHAL: %08lx\n", err);
goto error;
}
/* Find the default input device */
param = sizeof(defaultInputDevice);
err = AudioHardwareGetProperty(kAudioHardwarePropertyDefaultInputDevice, &param, &defaultInputDevice);
if (err != noErr || defaultInputDevice == kAudioDeviceUnknown)
{
ERR("Couldn't get the default audio device ID: %08lx\n", err);
goto error;
}
/* Set the current device to the default input device. */
err = AudioUnitSetProperty(au, kAudioOutputUnitProperty_CurrentDevice, kAudioUnitScope_Global, 0, &defaultInputDevice, sizeof(defaultInputDevice));
if (err != noErr)
{
ERR("Couldn't set current device of AUHAL to default input device: %08lx\n", err);
goto error;
}
/* Setup render callback */
/* This will be called when the AUHAL has input data. However, it won't
* be passed the data itself. The callback will have to all AudioUnitRender. */
callback.inputProc = CoreAudio_wiAudioUnitIOProc;
callback.inputProcRefCon = wwi;
err = AudioUnitSetProperty(au, kAudioOutputUnitProperty_SetInputCallback, kAudioUnitScope_Global, 0, &callback, sizeof(callback));
if (err != noErr)
{
ERR("Couldn't set input callback of AUHAL: %08lx\n", err);
goto error;
}
/* Setup the desired data format. */
desiredFormat.mFormatID = kAudioFormatLinearPCM;
desiredFormat.mFormatFlags = kLinearPCMFormatFlagIsPacked;
if (wBitsPerSample != 8)
desiredFormat.mFormatFlags |= kLinearPCMFormatFlagIsSignedInteger;
desiredFormat.mSampleRate = nSamplesPerSec;
desiredFormat.mChannelsPerFrame = nChannels;
desiredFormat.mFramesPerPacket = 1;
desiredFormat.mBitsPerChannel = wBitsPerSample;
desiredFormat.mBytesPerFrame = desiredFormat.mBitsPerChannel * desiredFormat.mChannelsPerFrame / 8;
desiredFormat.mBytesPerPacket = desiredFormat.mBytesPerFrame * desiredFormat.mFramesPerPacket;
/* Set the AudioOutputUnit output data format */
err = AudioUnitSetProperty(au, kAudioUnitProperty_StreamFormat, kAudioUnitScope_Output, 1, &desiredFormat, sizeof(desiredFormat));
if (err != noErr)
{
ERR("Couldn't set desired input format of AUHAL: %08lx\n", err);
goto error;
}
*out_au = au;
return 1;
error:
if (au)
CloseComponent(au);
return 0;
}
#endif