kraken_engine/kraken
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

Siren audio engine in progress

Browse Source
This commit is contained in:
Kearwood Gilbert
2013-02-07 13:00:51 -08:00
parent bbaa1e4d9f
commit 63d333ae46
6 changed files with 237 additions and 77 deletions
Download Patch File Download Diff File Expand all files Collapse all files

95
KREngine/kraken/KRAudioManager.cpp
View File

@@ -32,13 +32,14 @@
#include "KRAudioManager.h"
#include "KREngine-common.h"
#include "KRDataBlock.h"
#include "KRAudioBuffer.h"
OSStatus alcASASetListenerProc(const ALuint property, ALvoid *data, ALuint dataSize);
ALvoid alcMacOSXRenderingQualityProc(const ALint value);
KRAudioManager::KRAudioManager(KRContext &context) : KRContextObject(context)
{
m_audio_engine = KRAKEN_AUDIO_OPENAL;
m_audio_engine = KRAKEN_AUDIO_SIREN;
// OpenAL
m_alDevice = 0;
@@ -63,15 +64,10 @@ void KRAudioManager::initAudio()
}
}
// audio render procedure, don't allocate memory, don't take any locks, don't waste time
static OSStatus renderInput(void *inRefCon, AudioUnitRenderActionFlags *ioActionFlags, const AudioTimeStamp *inTimeStamp, UInt32 inBusNumber, UInt32 inNumberFrames, AudioBufferList *ioData)
void KRAudioManager::renderAudio(UInt32 inNumberFrames, AudioBufferList *ioData)
{
static float phase;
static float pan_phase;
// Get a reference to the object that was passed with the callback
// In this case, the AudioController passed itself so
// that you can access its data.
KRAudioManager *THIS = (KRAudioManager*)inRefCon;
// Get a pointer to the dataBuffer of the AudioBufferList
@@ -96,20 +92,25 @@ static OSStatus renderInput(void *inRefCon, AudioUnitRenderActionFlags *ioAction
// -32767 to 32767 and then cast to an integer
float left_channel = sinSignal * (sin(pan_phase) * 0.5f + 0.5f);
float right_channel = sinSignal * (-sin(pan_phase) * 0.5f + 0.5f);
left_channel = 0;
right_channel = 0;
#if CA_PREFER_FIXED_POINT
// Interleaved
// outA[i*2] = (SInt16)(left_channel * 32767.0f);
// outA[i*2 + 1] = (SInt16)(right_channel * 32767.0f);
// outA[i*2] = (SInt16)(left_channel * 32767.0f);
// outA[i*2 + 1] = (SInt16)(right_channel * 32767.0f);
// Non-Interleaved
outA[i] = (SInt32)(left_channel * 0x1000000f);
outB[i] = (SInt32)(right_channel * 0x1000000f);
#else
// Interleaved
// outA[i*2] = (Float32)left_channel;
// outA[i*2 + 1] = (Float32)right_channel;
// outA[i*2] = (Float32)left_channel;
// outA[i*2 + 1] = (Float32)right_channel;
// Non-Interleaved
outA[i] = (Float32)left_channel;
outB[i] = (Float32)right_channel;
@@ -123,6 +124,60 @@ static OSStatus renderInput(void *inRefCon, AudioUnitRenderActionFlags *ioAction
phase = phase - M_PI * freq;
}
for(std::set<KRAudioSource *>::iterator itr=m_activeAudioSources.begin(); itr != m_activeAudioSources.end(); itr++) {
int channel_count = 1;
KRAudioSource *source = *itr;
KRAudioBuffer *buffer = source->getBuffer();
int buffer_offset = source->getBufferFrame();
int frames_advanced = 0;
for (UInt32 i = 0; i < inNumberFrames; ++i) {
float left_channel=0;
float right_channel=0;
if(buffer) {
short *frame = buffer->getFrameData() + (buffer_offset++ * channel_count);
frames_advanced++;
left_channel = (float)frame[0] / 32767.0f;
if(channel_count == 2) {
right_channel = (float)frame[1] / 32767.0f;
} else {
right_channel = left_channel;
}
if(buffer_offset >= buffer->getFrameCount()) {
source->advanceFrames(frames_advanced);
frames_advanced = 0;
buffer = source->getBuffer();
buffer_offset = source->getBufferFrame();
}
}
#if CA_PREFER_FIXED_POINT
// Interleaved
// outA[i*2] = (SInt16)(left_channel * 32767.0f);
// outA[i*2 + 1] = (SInt16)(right_channel * 32767.0f);
// Non-Interleaved
outA[i] += (SInt32)(left_channel * 0x1000000f);
outB[i] += (SInt32)(right_channel * 0x1000000f);
#else
// Interleaved
// outA[i*2] = (Float32)left_channel;
// outA[i*2 + 1] = (Float32)right_channel;
// Non-Interleaved
outA[i] += (Float32)left_channel;
outB[i] += (Float32)right_channel;
#endif
}
source->advanceFrames(frames_advanced);
}
}
// audio render procedure, don't allocate memory, don't take any locks, don't waste time
OSStatus KRAudioManager::renderInput(void *inRefCon, AudioUnitRenderActionFlags *ioActionFlags, const AudioTimeStamp *inTimeStamp, UInt32 inBusNumber, UInt32 inNumberFrames, AudioBufferList *ioData)
{
((KRAudioManager*)inRefCon)->renderAudio(inNumberFrames, ioData);
return noErr;
}
@@ -298,7 +353,7 @@ void KRAudioManager::initSiren()
OSDEBUG(AUGraphStart(m_auGraph));
CAShow(m_auGraph);
// CAShow(m_auGraph);
}
}
@@ -505,3 +560,13 @@ KRAudioManager::audio_engine_t KRAudioManager::getAudioEngine()
{
return m_audio_engine;
}
void KRAudioManager::activateAudioSource(KRAudioSource *audioSource)
{
m_activeAudioSources.insert(audioSource);
}
void KRAudioManager::deactivateAudioSource(KRAudioSource *audioSource)
{
m_activeAudioSources.erase(audioSource);
}