125 lines
3.5 KiB
C
125 lines
3.5 KiB
C
/*
|
|
* Copyright (C) 2010-2011 Apple Inc. All rights reserved.
|
|
*
|
|
* This document is the property of Apple Inc.
|
|
* It is considered confidential and proprietary.
|
|
*
|
|
* This document may not be reproduced or transmitted in any form,
|
|
* in whole or in part, without the express written permission of
|
|
* Apple Inc.
|
|
*/
|
|
|
|
#include "loopback_process.h"
|
|
#include "timestamper.h"
|
|
#include "debug_tap.h"
|
|
|
|
#include <debug.h>
|
|
#include <AssertMacros.h>
|
|
#include <platform.h>
|
|
#include <platform/timer.h>
|
|
#include <sys/task.h>
|
|
|
|
typedef struct
|
|
{
|
|
uint32_t mNumFrames;
|
|
uint32_t mNumChannels;
|
|
uint32_t mSampleSize;
|
|
uint32_t mChannelBitmask;
|
|
// the scratch buffer is used by the AudioUnit. We assume it needs
|
|
// 8.24 Mono (channel 0) data
|
|
audio_unit_t mAudioUnit;
|
|
|
|
// for debug: which index to send to user
|
|
uint32_t mIndex;
|
|
debug_tap_t mInputTap;
|
|
debug_tap_t mOutputTap;
|
|
|
|
} internal_loopback_process_t;
|
|
|
|
|
|
// XXX channel bitmask currently not implemented. Assuming audio data is packed.
|
|
|
|
loopback_process_t create_loopback_process(audio_unit_t au, uint32_t frames_to_process, uint32_t channels_to_process, uint32_t sample_size, uint32_t channel_bitmask)
|
|
{
|
|
internal_loopback_process_t *This = (internal_loopback_process_t*)malloc(sizeof(internal_loopback_process_t));
|
|
if (This)
|
|
{
|
|
This->mNumFrames = frames_to_process;
|
|
This->mNumChannels = channels_to_process;
|
|
This->mSampleSize = sample_size;
|
|
This->mChannelBitmask = channel_bitmask;
|
|
This->mAudioUnit = au;
|
|
This->mIndex = 0;
|
|
This->mInputTap = NULL;
|
|
This->mOutputTap = NULL;
|
|
}
|
|
return This;
|
|
}
|
|
|
|
void destroy_loopback_process(loopback_process_t loopback)
|
|
{
|
|
internal_loopback_process_t *This = (internal_loopback_process_t*)loopback;
|
|
free(This);
|
|
}
|
|
|
|
void set_debug_tap(loopback_process_t loopback, debug_tap_t inputTap, debug_tap_t outputTap)
|
|
{
|
|
internal_loopback_process_t *This = (internal_loopback_process_t *)loopback;
|
|
// should we turn ints off for this?
|
|
This->mInputTap = inputTap;
|
|
This->mOutputTap = outputTap;
|
|
}
|
|
|
|
void set_tap_point(loopback_process_t loopback, uint32_t index)
|
|
{
|
|
internal_loopback_process_t *This = (internal_loopback_process_t *)loopback;
|
|
// should we turn ints off for this?
|
|
This->mIndex = index;
|
|
}
|
|
|
|
void process_data(loopback_process_t loopback, void *processBuffer)
|
|
{
|
|
internal_loopback_process_t *This = (internal_loopback_process_t *)loopback;
|
|
|
|
uint32_t sizeOfInput = This->mNumFrames * This->mNumChannels * This->mSampleSize;
|
|
uint32_t amountToSend = 0;
|
|
|
|
// DebugTap1
|
|
if (This->mInputTap && (This->mIndex == 1))
|
|
{
|
|
size_t this_amountToSend = send_to_tap(This->mInputTap, (uint8_t*)processBuffer, sizeOfInput);
|
|
if (this_amountToSend) amountToSend = this_amountToSend;
|
|
}
|
|
|
|
// DebugInput1
|
|
if (This->mOutputTap && (This->mIndex == 1))
|
|
{
|
|
size_t this_amountToSend = get_from_tap(This->mOutputTap, (uint8_t*)processBuffer, sizeOfInput);
|
|
if (this_amountToSend) amountToSend = this_amountToSend;
|
|
}
|
|
|
|
AudioUnit_Process(This->mAudioUnit, processBuffer, processBuffer, This->mNumFrames);
|
|
|
|
// DebugTap3
|
|
if (This->mInputTap && (This->mIndex == 3))
|
|
{
|
|
size_t this_amountToSend = send_to_tap(This->mInputTap, (uint8_t*)processBuffer, sizeOfInput);
|
|
if (this_amountToSend) amountToSend = this_amountToSend;
|
|
}
|
|
|
|
// DebugInput1
|
|
if (This->mOutputTap && (This->mIndex == 3))
|
|
{
|
|
size_t this_amountToSend = get_from_tap(This->mOutputTap, (uint8_t*)processBuffer, sizeOfInput);
|
|
if (this_amountToSend) amountToSend = this_amountToSend;
|
|
}
|
|
|
|
if (amountToSend)
|
|
{
|
|
// Should this be done at the beginning?
|
|
uint64_t timestamp = timer_get_ticks();
|
|
send_timestamp(This->mNumFrames, timestamp);
|
|
}
|
|
}
|
|
|