Skip to content

HTTPS clone URL

Subversion checkout URL

You can clone with HTTPS or Subversion.

Download ZIP
tree: a4fca2c402
Fetching contributors…

Cannot retrieve contributors at this time

200 lines (159 sloc) 6.61 kb
/*
SuperCollider audio driver for Android
Copyright (c) 2010 Dan Stowell. All rights reserved.
Incorporating code from
SuperCollider real time audio synthesis system
Copyright (c) 2002 James McCartney. All rights reserved.
http://www.audiosynth.com
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "SC_CoreAudio.h"
#include "SC_Prototypes.h"
#include "SC_HiddenWorld.h"
#include <sys/time.h>
SC_AndroidJNIAudioDriver::SC_AndroidJNIAudioDriver(struct World *inWorld)
: SC_AudioDriver(inWorld)
{
}
SC_AndroidJNIAudioDriver::~SC_AndroidJNIAudioDriver()
{
}
bool SC_AndroidJNIAudioDriver::DriverSetup(int* outNumSamplesPerCallback, double* outSampleRate)
{
// Here we are setting these to the values that were originally passed in as options.
// In current android impl, these values came directly from java as args to scsynth_android_start().
*outNumSamplesPerCallback = mPreferredHardwareBufferFrameSize;
*outSampleRate = mPreferredSampleRate;
int audioDataSize = mPreferredHardwareBufferFrameSize * mWorld->mNumOutputs * sizeof(float);
#ifndef NDEBUG
scprintf("SC_AndroidJNIAudioDriver::DriverSetup: allocating %i bytes for %i frames\n", audioDataSize, mPreferredHardwareBufferFrameSize);
#endif
if(mWorld->mVerbosity >= 0){
scprintf("<-SC_AndroidJNIAudioDriver::Setup world %p, mPreferredHardwareBufferFrameSize %i, mPreferredSampleRate %i, outNumSamplesPerCallback %i, outSampleRate %g\n",
mWorld, mPreferredHardwareBufferFrameSize, mPreferredSampleRate, *outNumSamplesPerCallback, *outSampleRate);
}
return true;
}
bool SC_AndroidJNIAudioDriver::DriverStart()
{
if(mWorld->mVerbosity >= 0){
scprintf("SC_AndroidJNIAudioDriver::DriverStart\n");
}
// no-op, nothing to do here
return true;
}
bool SC_AndroidJNIAudioDriver::DriverStop()
{
if(mWorld->mVerbosity >= 0){
scprintf("SC_AndroidJNIAudioDriver::DriverStop\n");
}
// TODO: send a message back to java to say stop the audio loop
return true;
}
// NB numSamplesPassed genuinely is num samples (not num frames as sometimes in sc code)
void SC_AndroidJNIAudioDriver::genaudio(short* arri, int numSamplesPassed)
{
//scprintf("->SC_AndroidJNIAudioDriver::genaudio()\n");
World *world = mWorld;
int numFramesPerCallback = NumSamplesPerCallback();
// mOSCbuftime = oscTime; // TODO, how do we set this?
mFromEngine.Free();
mToEngine.Perform();
mOscPacketsToEngine.Perform();
int numInputs = world->mNumInputs;
int numOutputs = world->mNumOutputs;
int bufFrames = mWorld->mBufLength;
int numBufs = numFramesPerCallback / bufFrames;
#ifndef NDEBUG
if((numFramesPerCallback * numOutputs) != numSamplesPassed)
scprintf("(numFramesPerCallback * numOutputs) != numSamplesPassed, %i %i\n", numFramesPerCallback, numOutputs, numSamplesPassed);
#endif
float *inBuses = mWorld->mAudioBus + mWorld->mNumOutputs * bufFrames;
float *outBuses = mWorld->mAudioBus;
int32 *inTouched = mWorld->mAudioBusTouched + mWorld->mNumOutputs;
int32 *outTouched = mWorld->mAudioBusTouched;
int minInputs = std::min<size_t>(numInputs, mWorld->mNumInputs);
int minOutputs = std::min<size_t>(numOutputs, mWorld->mNumOutputs);
int bufFramePos = 0;
int64 oscTime = mOSCbuftime;
int64 oscInc = mOSCincrement;
double oscToSamples = mOSCtoSamples;
// main loop
for (int i = 0; i < numBufs; ++i, mWorld->mBufCounter++, bufFramePos += bufFrames)
{
int32 bufCounter = mWorld->mBufCounter;
int32 *tch;
// copy+touch inputs
tch = inTouched;
for (int k = 0; k < minInputs; ++k)
{
float *dst = inBuses + k * bufFrames;
// OK, so source is an interleaved array of ints, target is noninterleaved floats
for (int frame = 0; frame < bufFrames; ++frame) *dst++ = (1.f/32767.f) * (float)arri[(bufFramePos+frame) * minInputs + k];
*tch++ = bufCounter;
}
// run engine
int64 schedTime;
int64 nextTime = oscTime + oscInc;
while ((schedTime = mScheduler.NextTime()) <= nextTime) {
float diffTime = (float)(schedTime - oscTime) * oscToSamples + 0.5;
float diffTimeFloor = floor(diffTime);
world->mSampleOffset = (int)diffTimeFloor;
world->mSubsampleOffset = diffTime - diffTimeFloor;
if (world->mSampleOffset < 0) world->mSampleOffset = 0;
else if (world->mSampleOffset >= world->mBufLength) world->mSampleOffset = world->mBufLength-1;
SC_ScheduledEvent event = mScheduler.Remove();
event.Perform();
}
world->mSampleOffset = 0;
world->mSubsampleOffset = 0.f;
World_Run(world);
// copy touched outputs
tch = outTouched;
for (int k = 0; k < minOutputs; ++k) {
// OK, so the source is noninterleaved floats, target is an interleaved array of ints
if (*tch++ == bufCounter) {
float *src = outBuses + k * bufFrames;
for (int frame = 0; frame < bufFrames; ++frame) arri[(bufFramePos+frame) * minOutputs + k] = (short)((*src++) * 32767.f);
} else {
for (int frame = 0; frame < bufFrames; ++frame) arri[(bufFramePos+frame) * minOutputs + k] = 0;
}
}
// update buffer time
oscTime = mOSCbuftime = nextTime;
}
mAudioSync.Signal();
}
int64 gOSCoffset = 0;
static inline int64 GetCurrentOSCTime()
{
struct timeval tv;
uint64 s, f;
gettimeofday(&tv, 0);
s = (uint64)tv.tv_sec + (uint64)kSECONDS_FROM_1900_to_1970;
f = (uint64)((double)tv.tv_usec * kMicrosToOSCunits);
return (s << 32) + f;
}
int64 oscTimeNow()
{
return GetCurrentOSCTime();
}
int32 server_timeseed()
{
int64 time = GetCurrentOSCTime();
return Hash((int32)(time >> 32) + Hash((int32)time));
}
void initializeScheduler()
{
gOSCoffset = GetCurrentOSCTime();
}
Jump to Line
Something went wrong with that request. Please try again.