1.1 --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
     1.2 +++ b/Alc/backends/send.c	Tue Oct 25 13:02:31 2011 -0700
     1.3 @@ -0,0 +1,472 @@
     1.4 +#include "config.h"
     1.5 +#include <stdlib.h>
     1.6 +#include "alMain.h"
     1.7 +#include "AL/al.h"
     1.8 +#include "AL/alc.h"
     1.9 +#include "alSource.h"
    1.10 +#include <jni.h>
    1.11 +
    1.12 +//////////////////// Summary
    1.13 +
    1.14 +struct send_data;
    1.15 +struct context_data;
    1.16 +
    1.17 +static void addContext(ALCdevice *, ALCcontext *);
    1.18 +static void syncContexts(ALCcontext *master, ALCcontext *slave);
    1.19 +static void syncSources(ALsource *master, ALsource *slave, 
    1.20 +			ALCcontext *masterCtx, ALCcontext *slaveCtx);
    1.21 +
    1.22 +static void syncSourcei(ALuint master, ALuint slave,
    1.23 +			ALCcontext *masterCtx, ALCcontext *ctx2, ALenum param);
    1.24 +static void syncSourcef(ALuint master, ALuint slave,
    1.25 +			ALCcontext *masterCtx, ALCcontext *ctx2, ALenum param);
    1.26 +static void syncSource3f(ALuint master, ALuint slave,
    1.27 +			ALCcontext *masterCtx, ALCcontext *ctx2, ALenum param);
    1.28 +
    1.29 +static void swapInContext(ALCdevice *, struct context_data *);
    1.30 +static void saveContext(ALCdevice *, struct context_data *);
    1.31 +static void limitContext(ALCdevice *, ALCcontext *);
    1.32 +static void unLimitContext(ALCdevice *);
    1.33 +
    1.34 +static void init(ALCdevice *);
    1.35 +static void renderData(ALCdevice *, int samples);
    1.36 +
    1.37 +#define UNUSED(x)  (void)(x)
    1.38 +
    1.39 +////////////////////  State
    1.40 +
    1.41 +typedef struct context_data {
    1.42 +  ALfloat ClickRemoval[MAXCHANNELS];
    1.43 +  ALfloat PendingClicks[MAXCHANNELS];
    1.44 +  ALvoid *renderBuffer;
    1.45 +  ALCcontext *ctx;
    1.46 +} context_data;
    1.47 +
    1.48 +typedef struct send_data {
    1.49 +  ALuint size;
    1.50 +  context_data **contexts;
    1.51 +  ALuint numContexts;
    1.52 +  ALuint maxContexts;
    1.53 +} send_data;
    1.54 +
    1.55 +
    1.56 +
    1.57 +////////////////////  Context Creation / Synchronization
    1.58 +
    1.59 +#define _MAKE_SYNC(NAME, INIT_EXPR, GET_EXPR, SET_EXPR)	\
    1.60 +  void NAME (ALuint sourceID1, ALuint sourceID2,	\
    1.61 +	     ALCcontext *ctx1, ALCcontext *ctx2,	\
    1.62 +	     ALenum param){				\
    1.63 +    INIT_EXPR;						\
    1.64 +    ALCcontext *current = alcGetCurrentContext();	\
    1.65 +    alcMakeContextCurrent(ctx1);			\
    1.66 +    GET_EXPR;						\
    1.67 +    alcMakeContextCurrent(ctx2);			\
    1.68 +    SET_EXPR;						\
    1.69 +    alcMakeContextCurrent(current);			\
    1.70 +  }
    1.71 +  
    1.72 +#define MAKE_SYNC(NAME, TYPE, GET, SET)			\
    1.73 +  _MAKE_SYNC(NAME,					\
    1.74 +	     TYPE value,				\
    1.75 +             GET(sourceID1, param, &value),		\
    1.76 +             SET(sourceID2, param, value))
    1.77 +  
    1.78 +#define MAKE_SYNC3(NAME, TYPE, GET, SET)				\
    1.79 +  _MAKE_SYNC(NAME,							\
    1.80 +	     TYPE value1; TYPE value2; TYPE value3;,			\
    1.81 +	     GET(sourceID1, param, &value1, &value2, &value3),		\
    1.82 +	     SET(sourceID2, param,  value1,  value2,  value3))
    1.83 +
    1.84 +MAKE_SYNC( syncSourcei,  ALint,   alGetSourcei,  alSourcei);
    1.85 +MAKE_SYNC( syncSourcef,  ALfloat, alGetSourcef,  alSourcef);
    1.86 +MAKE_SYNC3(syncSource3i, ALint,   alGetSource3i, alSource3i);
    1.87 +MAKE_SYNC3(syncSource3f, ALfloat, alGetSource3f, alSource3f);
    1.88 +  
    1.89 +void syncSources(ALsource *masterSource, ALsource *slaveSource, 
    1.90 +		 ALCcontext *masterCtx, ALCcontext *slaveCtx){
    1.91 +  ALuint master = masterSource->source;
    1.92 +  ALuint slave = slaveSource->source;
    1.93 +  ALCcontext *current = alcGetCurrentContext();
    1.94 +
    1.95 +  syncSourcef(master,slave,masterCtx,slaveCtx,AL_PITCH);
    1.96 +  syncSourcef(master,slave,masterCtx,slaveCtx,AL_GAIN);
    1.97 +  syncSourcef(master,slave,masterCtx,slaveCtx,AL_MAX_DISTANCE);
    1.98 +  syncSourcef(master,slave,masterCtx,slaveCtx,AL_ROLLOFF_FACTOR);
    1.99 +  syncSourcef(master,slave,masterCtx,slaveCtx,AL_REFERENCE_DISTANCE);
   1.100 +  syncSourcef(master,slave,masterCtx,slaveCtx,AL_MIN_GAIN);
   1.101 +  syncSourcef(master,slave,masterCtx,slaveCtx,AL_MAX_GAIN);
   1.102 +  syncSourcef(master,slave,masterCtx,slaveCtx,AL_CONE_OUTER_GAIN);
   1.103 +  syncSourcef(master,slave,masterCtx,slaveCtx,AL_CONE_INNER_ANGLE);
   1.104 +  syncSourcef(master,slave,masterCtx,slaveCtx,AL_CONE_OUTER_ANGLE);
   1.105 +  syncSourcef(master,slave,masterCtx,slaveCtx,AL_SEC_OFFSET);
   1.106 +  syncSourcef(master,slave,masterCtx,slaveCtx,AL_SAMPLE_OFFSET);
   1.107 +  syncSourcef(master,slave,masterCtx,slaveCtx,AL_BYTE_OFFSET);
   1.108 +    
   1.109 +  syncSource3f(master,slave,masterCtx,slaveCtx,AL_POSITION);
   1.110 +  syncSource3f(master,slave,masterCtx,slaveCtx,AL_VELOCITY);
   1.111 +  syncSource3f(master,slave,masterCtx,slaveCtx,AL_DIRECTION);
   1.112 +  
   1.113 +  syncSourcei(master,slave,masterCtx,slaveCtx,AL_SOURCE_RELATIVE);
   1.114 +  syncSourcei(master,slave,masterCtx,slaveCtx,AL_LOOPING);
   1.115 +
   1.116 +  alcMakeContextCurrent(masterCtx);
   1.117 +  ALint source_type;
   1.118 +  alGetSourcei(master, AL_SOURCE_TYPE, &source_type);
   1.119 +
   1.120 +  // Only static sources are currently synchronized! 
   1.121 +  if (AL_STATIC == source_type){
   1.122 +    ALint master_buffer;
   1.123 +    ALint slave_buffer;
   1.124 +    alGetSourcei(master, AL_BUFFER, &master_buffer);
   1.125 +    alcMakeContextCurrent(slaveCtx);
   1.126 +    alGetSourcei(slave, AL_BUFFER, &slave_buffer);
   1.127 +    if (master_buffer != slave_buffer){
   1.128 +      alSourcei(slave, AL_BUFFER, master_buffer);
   1.129 +    }
   1.130 +  }
   1.131 +  
   1.132 +  // Synchronize the state of the two sources.
   1.133 +  alcMakeContextCurrent(masterCtx);
   1.134 +  ALint masterState;
   1.135 +  ALint slaveState;
   1.136 +
   1.137 +  alGetSourcei(master, AL_SOURCE_STATE, &masterState);
   1.138 +  alcMakeContextCurrent(slaveCtx);
   1.139 +  alGetSourcei(slave, AL_SOURCE_STATE, &slaveState);
   1.140 +
   1.141 +  if (masterState != slaveState){
   1.142 +    switch (masterState){
   1.143 +    case AL_INITIAL : alSourceRewind(slave); break;
   1.144 +    case AL_PLAYING : alSourcePlay(slave);   break;
   1.145 +    case AL_PAUSED  : alSourcePause(slave);  break;
   1.146 +    case AL_STOPPED : alSourceStop(slave);   break;
   1.147 +    }
   1.148 +  }
   1.149 +  // Restore whatever context was previously active.
   1.150 +  alcMakeContextCurrent(current);
   1.151 +}
   1.152 +
   1.153 +
   1.154 +void syncContexts(ALCcontext *master, ALCcontext *slave){
   1.155 +  /* If there aren't sufficient sources in slave to mirror 
   1.156 +     the sources in master, create them. */
   1.157 +  ALCcontext *current = alcGetCurrentContext();
   1.158 +
   1.159 +  UIntMap *masterSourceMap = &(master->SourceMap);
   1.160 +  UIntMap *slaveSourceMap = &(slave->SourceMap);
   1.161 +  ALuint numMasterSources = masterSourceMap->size;
   1.162 +  ALuint numSlaveSources = slaveSourceMap->size;
   1.163 +
   1.164 +  alcMakeContextCurrent(slave);
   1.165 +  if (numSlaveSources < numMasterSources){
   1.166 +    ALuint numMissingSources = numMasterSources - numSlaveSources;
   1.167 +    ALuint newSources[numMissingSources];
   1.168 +    alGenSources(numMissingSources, newSources);
   1.169 +  }
   1.170 +
   1.171 +  /* Now, slave is gauranteed to have at least as many sources
   1.172 +     as master.  Sync each source from master to the corresponding
   1.173 +     source in slave. */
   1.174 +  int i;
   1.175 +  for(i = 0; i < masterSourceMap->size; i++){
   1.176 +    syncSources((ALsource*)masterSourceMap->array[i].value,
   1.177 +		(ALsource*)slaveSourceMap->array[i].value,
   1.178 +		master, slave);
   1.179 +  }
   1.180 +  alcMakeContextCurrent(current);
   1.181 +}
   1.182 +
   1.183 +static void addContext(ALCdevice *Device, ALCcontext *context){
   1.184 +  send_data *data = (send_data*)Device->ExtraData;
   1.185 +  // expand array if necessary
   1.186 +  if (data->numContexts >= data->maxContexts){
   1.187 +    ALuint newMaxContexts = data->maxContexts*2 + 1;
   1.188 +    data->contexts = realloc(data->contexts, newMaxContexts*sizeof(context_data));
   1.189 +    data->maxContexts = newMaxContexts;
   1.190 +  }
   1.191 +  // create context_data and add it to the main array
   1.192 +  context_data *ctxData;
   1.193 +  ctxData = (context_data*)calloc(1, sizeof(*ctxData));
   1.194 +  ctxData->renderBuffer = malloc(data->size);
   1.195 +  ctxData->ctx = context;
   1.196 +
   1.197 +  data->contexts[data->numContexts] = ctxData;
   1.198 +  data->numContexts++;
   1.199 +}
   1.200 +
   1.201 +
   1.202 +////////////////////  Context Switching 
   1.203 +
   1.204 +/* A device brings along with it two pieces of state
   1.205 + * which have to be swapped in and out with each context.
   1.206 + */
   1.207 +static void swapInContext(ALCdevice *Device, context_data *ctxData){
   1.208 +  memcpy(Device->ClickRemoval, ctxData->ClickRemoval, sizeof(ALfloat)*MAXCHANNELS);
   1.209 +  memcpy(Device->PendingClicks, ctxData->PendingClicks, sizeof(ALfloat)*MAXCHANNELS);
   1.210 +}
   1.211 +
   1.212 +static void saveContext(ALCdevice *Device, context_data *ctxData){
   1.213 +  memcpy(ctxData->ClickRemoval, Device->ClickRemoval, sizeof(ALfloat)*MAXCHANNELS);
   1.214 +  memcpy(ctxData->PendingClicks, Device->PendingClicks, sizeof(ALfloat)*MAXCHANNELS);
   1.215 +}  
   1.216 +
   1.217 +static ALCcontext **currentContext;
   1.218 +static ALuint currentNumContext;
   1.219 +
   1.220 +/* By default, all contexts are rendered at once for each call to aluMixData.
   1.221 + * This function uses the internals of the ALCdecice struct to temporarly 
   1.222 + * cause aluMixData to only render the chosen context.
   1.223 + */
   1.224 +static void limitContext(ALCdevice *Device, ALCcontext *ctx){
   1.225 +  currentContext  = Device->Contexts;
   1.226 +  currentNumContext  = Device->NumContexts;
   1.227 +  Device->Contexts = &ctx;
   1.228 +  Device->NumContexts = 1;
   1.229 +}
   1.230 +
   1.231 +static void unLimitContext(ALCdevice *Device){
   1.232 +  Device->Contexts = currentContext;
   1.233 +  Device->NumContexts = currentNumContext;
   1.234 +}
   1.235 +
   1.236 +
   1.237 +////////////////////   Main Device Loop
   1.238 +
   1.239 +/* Establish the LWJGL context as the main context, which will
   1.240 + * be synchronized to all the slave contexts
   1.241 + */
   1.242 +static void init(ALCdevice *Device){
   1.243 +  ALCcontext *masterContext = alcGetCurrentContext();
   1.244 +  addContext(Device, masterContext);
   1.245 +}
   1.246 +
   1.247 +
   1.248 +static void renderData(ALCdevice *Device, int samples){
   1.249 +  if(!Device->Connected){return;}
   1.250 +  send_data *data = (send_data*)Device->ExtraData;
   1.251 +  ALCcontext *current = alcGetCurrentContext();
   1.252 +
   1.253 +  ALuint i;
   1.254 +  for (i = 1; i < data->numContexts; i++){
   1.255 +    syncContexts(data->contexts[0]->ctx , data->contexts[i]->ctx);
   1.256 +  }
   1.257 +  
   1.258 +  if ((uint) samples > Device->UpdateSize){
   1.259 +    printf("exceeding internal buffer size; dropping samples\n");
   1.260 +    printf("requested %d; available %d\n", samples, Device->UpdateSize);
   1.261 +    samples = (int) Device->UpdateSize;
   1.262 +  }
   1.263 +
   1.264 +  for (i = 0; i < data->numContexts; i++){
   1.265 +    context_data *ctxData = data->contexts[i];
   1.266 +    ALCcontext *ctx = ctxData->ctx;
   1.267 +    alcMakeContextCurrent(ctx);
   1.268 +    limitContext(Device, ctx);
   1.269 +    swapInContext(Device, ctxData);
   1.270 +    aluMixData(Device, ctxData->renderBuffer, samples);
   1.271 +    saveContext(Device, ctxData);
   1.272 +    unLimitContext(Device);
   1.273 +  }
   1.274 +  alcMakeContextCurrent(current);
   1.275 +}
   1.276 +
   1.277 +
   1.278 +////////////////////   JNI Methods
   1.279 +
   1.280 +#include "com_aurellem_capture_AudioSend.h"
   1.281 +
   1.282 +/*
   1.283 + * Class:     com_aurellem_capture_AudioSend
   1.284 + * Method:    nstep
   1.285 + * Signature: (JI)V
   1.286 + */
   1.287 +JNIEXPORT void JNICALL Java_com_aurellem_capture_AudioSend_nstep
   1.288 +(JNIEnv *env, jclass clazz, jlong device, jint samples){
   1.289 +  UNUSED(env);UNUSED(clazz);UNUSED(device);
   1.290 +  renderData((ALCdevice*)((intptr_t)device), samples);
   1.291 +}
   1.292 +
   1.293 +/*
   1.294 + * Class:     com_aurellem_capture_AudioSend
   1.295 + * Method:    ngetSamples
   1.296 + * Signature: (JLjava/nio/ByteBuffer;III)V
   1.297 + */
   1.298 +JNIEXPORT void JNICALL Java_com_aurellem_capture_AudioSend_ngetSamples
   1.299 +(JNIEnv *env, jclass clazz, jlong device, jobject buffer, jint position, 
   1.300 + jint samples, jint n){
   1.301 +  UNUSED(clazz);  
   1.302 +
   1.303 +  ALvoid *buffer_address = 
   1.304 +    ((ALbyte *)(((char*)(*env)->GetDirectBufferAddress(env, buffer)) + position));
   1.305 +  ALCdevice *recorder = (ALCdevice*) ((intptr_t)device);
   1.306 +  send_data *data = (send_data*)recorder->ExtraData;
   1.307 +  if ((ALuint)n > data->numContexts){return;}
   1.308 +  if ((uint) samples > data->size){
   1.309 +    samples = (int) data->size;
   1.310 +  }
   1.311 +  memcpy(buffer_address, data->contexts[n]->renderBuffer, samples*sizeof(ALfloat));
   1.312 +}
   1.313 +
   1.314 +/*
   1.315 + * Class:     com_aurellem_capture_AudioSend
   1.316 + * Method:    naddListener
   1.317 + * Signature: (J)V
   1.318 + */
   1.319 +JNIEXPORT void JNICALL Java_com_aurellem_capture_AudioSend_naddListener
   1.320 +(JNIEnv *env, jclass clazz, jlong device){
   1.321 +  UNUSED(env); UNUSED(clazz);
   1.322 +  printf("creating new context via naddListener\n");
   1.323 +  ALCdevice *Device = (ALCdevice*) ((intptr_t)device);
   1.324 +  ALCcontext *new = alcCreateContext(Device, NULL);
   1.325 +  addContext(Device, new);
   1.326 +}
   1.327 +
   1.328 +/*
   1.329 + * Class:     com_aurellem_capture_AudioSend
   1.330 + * Method:    nsetNthListener3f
   1.331 + * Signature: (IFFFJI)V
   1.332 + */
   1.333 +JNIEXPORT void JNICALL Java_com_aurellem_capture_AudioSend_nsetNthListener3f
   1.334 +  (JNIEnv *env, jclass clazz, jint param, 
   1.335 +   jfloat v1, jfloat v2, jfloat v3, jlong device, jint contextNum){
   1.336 +  UNUSED(env);UNUSED(clazz);
   1.337 +
   1.338 +  ALCdevice *Device = (ALCdevice*) ((intptr_t)device);
   1.339 +  send_data *data = (send_data*)Device->ExtraData;
   1.340 +  
   1.341 +  ALCcontext *current = alcGetCurrentContext();
   1.342 +  if ((ALuint)contextNum > data->numContexts){return;}
   1.343 +  alcMakeContextCurrent(data->contexts[contextNum]->ctx);
   1.344 +  alListener3f(param, v1, v2, v3);
   1.345 +  alcMakeContextCurrent(current);
   1.346 +}
   1.347 +
   1.348 +/*
   1.349 + * Class:     com_aurellem_capture_AudioSend
   1.350 + * Method:    nsetNthListenerf
   1.351 + * Signature: (IFJI)V
   1.352 + */
   1.353 +JNIEXPORT void JNICALL Java_com_aurellem_capture_AudioSend_nsetNthListenerf
   1.354 +(JNIEnv *env, jclass clazz, jint param, jfloat v1, jlong device, 
   1.355 + jint contextNum){
   1.356 +
   1.357 +  UNUSED(env);UNUSED(clazz);
   1.358 +  
   1.359 +  ALCdevice *Device = (ALCdevice*) ((intptr_t)device);
   1.360 +  send_data *data = (send_data*)Device->ExtraData;
   1.361 +  
   1.362 +  ALCcontext *current = alcGetCurrentContext();
   1.363 +  if ((ALuint)contextNum > data->numContexts){return;}
   1.364 +  alcMakeContextCurrent(data->contexts[contextNum]->ctx);
   1.365 +  alListenerf(param, v1);
   1.366 +  alcMakeContextCurrent(current);
   1.367 +}
   1.368 +
   1.369 +/*
   1.370 + * Class:     com_aurellem_capture_AudioSend
   1.371 + * Method:    ninitDevice
   1.372 + * Signature: (J)V
   1.373 + */                     
   1.374 +JNIEXPORT void JNICALL Java_com_aurellem_capture_AudioSend_ninitDevice
   1.375 +(JNIEnv *env, jclass clazz, jlong device){
   1.376 +  UNUSED(env);UNUSED(clazz);
   1.377 +  
   1.378 +  ALCdevice *Device = (ALCdevice*) ((intptr_t)device);
   1.379 +  init(Device);
   1.380 +
   1.381 +}
   1.382 +
   1.383 +
   1.384 +////////////////////   Device Initilization / Management
   1.385 +
   1.386 +static const ALCchar sendDevice[] = "Multiple Audio Send";
   1.387 +
   1.388 +static ALCboolean send_open_playback(ALCdevice *device, 
   1.389 + const ALCchar *deviceName)
   1.390 +{
   1.391 +  send_data *data;
   1.392 +  // stop any buffering for stdout, so that I can 
   1.393 +  // see the printf statements in my terminal immediatley
   1.394 +  setbuf(stdout, NULL);
   1.395 +
   1.396 +  if(!deviceName)
   1.397 +    deviceName = sendDevice;
   1.398 +  else if(strcmp(deviceName, sendDevice) != 0)
   1.399 +    return ALC_FALSE;
   1.400 +  data = (send_data*)calloc(1, sizeof(*data));
   1.401 +  device->szDeviceName = strdup(deviceName);
   1.402 +  device->ExtraData = data;
   1.403 +  return ALC_TRUE;
   1.404 +}
   1.405 +
   1.406 +static void send_close_playback(ALCdevice *device)
   1.407 +{
   1.408 +  send_data *data = (send_data*)device->ExtraData;
   1.409 +  alcMakeContextCurrent(NULL);
   1.410 +  ALuint i;
   1.411 +  // Destroy all slave contexts. LWJGL will take care of 
   1.412 +  // its own context.
   1.413 +  for (i = 1; i < data->numContexts; i++){
   1.414 +    context_data *ctxData = data->contexts[i];
   1.415 +    alcDestroyContext(ctxData->ctx);
   1.416 +    free(ctxData->renderBuffer);
   1.417 +    free(ctxData);
   1.418 +  }
   1.419 +  free(data);
   1.420 +  device->ExtraData = NULL;
   1.421 +}
   1.422 +
   1.423 +static ALCboolean send_reset_playback(ALCdevice *device)
   1.424 +{
   1.425 +  send_data *data = (send_data*)device->ExtraData;
   1.426 +  ALuint channels=0, bits=0;
   1.427 +  device->FmtType = DevFmtShort;
   1.428 +  bits = BytesFromDevFmt(device->FmtType) * 8;
   1.429 +  channels = ChannelsFromDevFmt(device->FmtChans);
   1.430 +  data->size = device->UpdateSize * channels * bits / 8;
   1.431 +
   1.432 +  return ALC_TRUE;
   1.433 +}
   1.434 +
   1.435 +static void send_stop_playback(ALCdevice *Device){
   1.436 +  UNUSED(Device);
   1.437 +}
   1.438 +
   1.439 +static const BackendFuncs send_funcs = {
   1.440 +  send_open_playback,
   1.441 +  send_close_playback,
   1.442 +  send_reset_playback,
   1.443 +  send_stop_playback,
   1.444 +  NULL,
   1.445 +  NULL,  /* These would be filled with functions to    */
   1.446 +  NULL,  /* handle capturing audio if we we into that  */
   1.447 +  NULL,  /* sort of thing...                           */
   1.448 +  NULL,
   1.449 +  NULL
   1.450 +};
   1.451 +
   1.452 +ALCboolean alc_send_init(BackendFuncs *func_list){
   1.453 +  *func_list = send_funcs;
   1.454 +  return ALC_TRUE;
   1.455 +}
   1.456 +
   1.457 +void alc_send_deinit(void){}
   1.458 +
   1.459 +void alc_send_probe(enum DevProbe type)
   1.460 +{
   1.461 +  switch(type)
   1.462 +    {
   1.463 +    case DEVICE_PROBE:
   1.464 +      AppendDeviceList(sendDevice);
   1.465 +      break;
   1.466 +    case ALL_DEVICE_PROBE:
   1.467 +      AppendAllDeviceList(sendDevice);
   1.468 +      break;
   1.469 +    case CAPTURE_DEVICE_PROBE:
   1.470 +      break;
   1.471 +    }
   1.472 +}
   1.473 +
   1.474 +
   1.475 +