diff -r 000000000000 -r 6474c204b198 media/libcubeb/src/cubeb_opensl.c
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/media/libcubeb/src/cubeb_opensl.c	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,622 @@
+/*
+ * Copyright © 2012 Mozilla Foundation
+ *
+ * This program is made available under an ISC-style license.  See the
+ * accompanying file LICENSE for details.
+ */
+#undef NDEBUG
+#include <assert.h>
+#include <dlfcn.h>
+#include <stdlib.h>
+#include <SLES/OpenSLES.h>
+#if defined(__ANDROID__)
+#include "android/sles_definitions.h"
+#include <SLES/OpenSLES_Android.h>
+#include <android/log.h>
+#define LOG(args...)  __android_log_print(ANDROID_LOG_INFO, "Cubeb_OpenSL" , ## args)
+#endif
+#include "cubeb/cubeb.h"
+#include "cubeb-internal.h"
+
+static struct cubeb_ops const opensl_ops;
+
+struct cubeb {
+  struct cubeb_ops const * ops;
+  void * lib;
+  void * libmedia;
+  int32_t (* get_output_latency)(uint32_t * latency, int stream_type);
+  SLInterfaceID SL_IID_BUFFERQUEUE;
+  SLInterfaceID SL_IID_PLAY;
+#if defined(__ANDROID__)
+  SLInterfaceID SL_IID_ANDROIDCONFIGURATION;
+#endif
+  SLObjectItf engObj;
+  SLEngineItf eng;
+  SLObjectItf outmixObj;
+};
+
+#define NELEMS(A) (sizeof(A) / sizeof A[0])
+#define NBUFS 4
+#define AUDIO_STREAM_TYPE_MUSIC 3
+
+struct cubeb_stream {
+  cubeb * context;
+  SLObjectItf playerObj;
+  SLPlayItf play;
+  SLBufferQueueItf bufq;
+  void *queuebuf[NBUFS];
+  int queuebuf_idx;
+  long queuebuf_len;
+  long bytespersec;
+  long framesize;
+  int draining;
+  cubeb_stream_type stream_type;
+
+  cubeb_data_callback data_callback;
+  cubeb_state_callback state_callback;
+  void * user_ptr;
+};
+
+static void
+bufferqueue_callback(SLBufferQueueItf caller, void * user_ptr)
+{
+  cubeb_stream * stm = user_ptr;
+  SLBufferQueueState state;
+  (*stm->bufq)->GetState(stm->bufq, &state);
+
+  if (stm->draining) {
+    if (!state.count) {
+      stm->draining = 0;
+      stm->state_callback(stm, stm->user_ptr, CUBEB_STATE_DRAINED);
+    }
+    return;
+  }
+
+  if (state.count > 1)
+    return;
+
+  SLuint32 i;
+  for (i = state.count; i < NBUFS; i++) {
+    void *buf = stm->queuebuf[stm->queuebuf_idx];
+    long written = stm->data_callback(stm, stm->user_ptr,
+                                      buf, stm->queuebuf_len / stm->framesize);
+    if (written == CUBEB_ERROR) {
+      (*stm->play)->SetPlayState(stm->play, SL_PLAYSTATE_STOPPED);
+      return;
+    }
+
+    if (written) {
+      (*stm->bufq)->Enqueue(stm->bufq, buf, written * stm->framesize);
+      stm->queuebuf_idx = (stm->queuebuf_idx + 1) % NBUFS;
+    } else if (!i) {
+      stm->state_callback(stm, stm->user_ptr, CUBEB_STATE_DRAINED);
+      return;
+    }
+
+    if ((written * stm->framesize) < stm->queuebuf_len) {
+      stm->draining = 1;
+      return;
+    }
+  }
+}
+
+#if defined(__ANDROID__)
+static SLuint32
+convert_stream_type_to_sl_stream(cubeb_stream_type stream_type)
+{
+  switch(stream_type) {
+    case CUBEB_STREAM_TYPE_SYSTEM:
+      return SL_ANDROID_STREAM_SYSTEM;
+    case CUBEB_STREAM_TYPE_MUSIC:
+      return SL_ANDROID_STREAM_MEDIA;
+    case CUBEB_STREAM_TYPE_NOTIFICATION:
+      return SL_ANDROID_STREAM_NOTIFICATION;
+    case CUBEB_STREAM_TYPE_ALARM:
+      return SL_ANDROID_STREAM_ALARM;
+    case CUBEB_STREAM_TYPE_VOICE_CALL:
+      return SL_ANDROID_STREAM_VOICE;
+    case CUBEB_STREAM_TYPE_RING:
+      return SL_ANDROID_STREAM_RING;
+    case CUBEB_STREAM_TYPE_ENFORCED_AUDIBLE:
+    default:
+      return 0xFFFFFFFF;
+  }
+}
+#endif
+
+static void opensl_destroy(cubeb * ctx);
+
+/*static*/ int
+opensl_init(cubeb ** context, char const * context_name)
+{
+  cubeb * ctx;
+
+  *context = NULL;
+
+  ctx = calloc(1, sizeof(*ctx));
+  assert(ctx);
+
+  ctx->ops = &opensl_ops;
+
+  ctx->lib = dlopen("libOpenSLES.so", RTLD_LAZY);
+  ctx->libmedia = dlopen("libmedia.so", RTLD_LAZY);
+  if (!ctx->lib || !ctx->libmedia) {
+    free(ctx);
+    return CUBEB_ERROR;
+  }
+
+  /* Get the latency, in ms, from AudioFlinger */
+  /* status_t AudioSystem::getOutputLatency(uint32_t* latency,
+   *                                        audio_stream_type_t streamType) */
+  /* First, try the most recent signature. */
+  ctx->get_output_latency =
+    dlsym(ctx->libmedia, "_ZN7android11AudioSystem16getOutputLatencyEPj19audio_stream_type_t");
+  if (!ctx->get_output_latency) {
+    /* in case of failure, try the legacy version. */
+    /* status_t AudioSystem::getOutputLatency(uint32_t* latency,
+     *                                        int streamType) */
+    ctx->get_output_latency =
+      dlsym(ctx->libmedia, "_ZN7android11AudioSystem16getOutputLatencyEPji");
+    if (!ctx->get_output_latency) {
+      opensl_destroy(ctx);
+      return CUBEB_ERROR;
+    }
+  }
+
+  typedef SLresult (*slCreateEngine_t)(SLObjectItf *,
+                                       SLuint32,
+                                       const SLEngineOption *,
+                                       SLuint32,
+                                       const SLInterfaceID *,
+                                       const SLboolean *);
+  slCreateEngine_t f_slCreateEngine =
+    (slCreateEngine_t)dlsym(ctx->lib, "slCreateEngine");
+  SLInterfaceID SL_IID_ENGINE = *(SLInterfaceID *)dlsym(ctx->lib, "SL_IID_ENGINE");
+  SLInterfaceID SL_IID_OUTPUTMIX = *(SLInterfaceID *)dlsym(ctx->lib, "SL_IID_OUTPUTMIX");
+  ctx->SL_IID_BUFFERQUEUE = *(SLInterfaceID *)dlsym(ctx->lib, "SL_IID_BUFFERQUEUE");
+#if defined(__ANDROID__)
+  ctx->SL_IID_ANDROIDCONFIGURATION = *(SLInterfaceID *)dlsym(ctx->lib, "SL_IID_ANDROIDCONFIGURATION");
+#endif
+  ctx->SL_IID_PLAY = *(SLInterfaceID *)dlsym(ctx->lib, "SL_IID_PLAY");
+  if (!f_slCreateEngine ||
+      !SL_IID_ENGINE ||
+      !SL_IID_OUTPUTMIX ||
+      !ctx->SL_IID_BUFFERQUEUE ||
+#if defined(__ANDROID__)
+      !ctx->SL_IID_ANDROIDCONFIGURATION ||
+#endif
+      !ctx->SL_IID_PLAY) {
+    opensl_destroy(ctx);
+    return CUBEB_ERROR;
+  }
+
+  const SLEngineOption opt[] = {{SL_ENGINEOPTION_THREADSAFE, SL_BOOLEAN_TRUE}};
+
+  SLresult res;
+  res = f_slCreateEngine(&ctx->engObj, 1, opt, 0, NULL, NULL);
+  if (res != SL_RESULT_SUCCESS) {
+    opensl_destroy(ctx);
+    return CUBEB_ERROR;
+  }
+
+  res = (*ctx->engObj)->Realize(ctx->engObj, SL_BOOLEAN_FALSE);
+  if (res != SL_RESULT_SUCCESS) {
+    opensl_destroy(ctx);
+    return CUBEB_ERROR;
+  }
+
+  res = (*ctx->engObj)->GetInterface(ctx->engObj, SL_IID_ENGINE, &ctx->eng);
+  if (res != SL_RESULT_SUCCESS) {
+    opensl_destroy(ctx);
+    return CUBEB_ERROR;
+  }
+
+  const SLInterfaceID idsom[] = {SL_IID_OUTPUTMIX};
+  const SLboolean reqom[] = {SL_BOOLEAN_TRUE};
+  res = (*ctx->eng)->CreateOutputMix(ctx->eng, &ctx->outmixObj, 1, idsom, reqom);
+  if (res != SL_RESULT_SUCCESS) {
+    opensl_destroy(ctx);
+    return CUBEB_ERROR;
+  }
+
+  res = (*ctx->outmixObj)->Realize(ctx->outmixObj, SL_BOOLEAN_FALSE);
+  if (res != SL_RESULT_SUCCESS) {
+    opensl_destroy(ctx);
+    return CUBEB_ERROR;
+  }
+
+  *context = ctx;
+
+  return CUBEB_OK;
+}
+
+static char const *
+opensl_get_backend_id(cubeb * ctx)
+{
+  return "opensl";
+}
+
+static int
+opensl_get_max_channel_count(cubeb * ctx, uint32_t * max_channels)
+{
+  assert(ctx && max_channels);
+  /* The android mixer handles up to two channels, see
+  http://androidxref.com/4.2.2_r1/xref/frameworks/av/services/audioflinger/AudioFlinger.h#67 */
+  *max_channels = 2;
+
+  return CUBEB_OK;
+}
+
+static int
+opensl_get_preferred_sample_rate(cubeb * ctx, uint32_t * rate)
+{
+  /* https://android.googlesource.com/platform/ndk.git/+/master/docs/opensles/index.html
+   * We don't want to deal with JNI here (and we don't have Java on b2g anyways),
+   * so we just dlopen the library and get the two symbols we need. */
+  int rv;
+  void * libmedia;
+  uint32_t (*get_primary_output_samplingrate)();
+  uint32_t (*get_output_samplingrate)(int * samplingRate, int streamType);
+  uint32_t primary_sampling_rate;
+
+  libmedia = dlopen("libmedia.so", RTLD_LAZY);
+  if (!libmedia) {
+    return CUBEB_ERROR;
+  }
+
+  /* uint32_t AudioSystem::getPrimaryOutputSamplingRate(void) */
+  get_primary_output_samplingrate =
+    dlsym(libmedia, "_ZN7android11AudioSystem28getPrimaryOutputSamplingRateEv");
+  if (!get_primary_output_samplingrate) {
+    /* fallback to
+     * status_t AudioSystem::getOutputSamplingRate(int* samplingRate, int streamType)
+     * if we cannot find getPrimaryOutputSamplingRate. */
+    get_output_samplingrate =
+      dlsym(libmedia, "_ZN7android11AudioSystem21getOutputSamplingRateEPj19audio_stream_type_t");
+    if (!get_output_samplingrate) {
+      /* Another signature exists, with a int instead of an audio_stream_type_t */
+      get_output_samplingrate =
+        dlsym(libmedia, "_ZN7android11AudioSystem21getOutputSamplingRateEPii");
+      if (!get_output_samplingrate) {
+        dlclose(libmedia);
+        return CUBEB_ERROR;
+      }
+    }
+  }
+
+  if (get_primary_output_samplingrate) {
+    *rate = get_primary_output_samplingrate();
+  } else {
+    /* We don't really know about the type, here, so we just pass music. */
+    rv = get_output_samplingrate((int *) rate, AUDIO_STREAM_TYPE_MUSIC);
+    if (rv) {
+      dlclose(libmedia);
+      return CUBEB_ERROR;
+    }
+  }
+
+  dlclose(libmedia);
+
+  /* Depending on which method we called above, we can get a zero back, yet have
+   * a non-error return value, especially if the audio system is not
+   * ready/shutting down (i.e. when we can't get our hand on the AudioFlinger
+   * thread). */
+  if (*rate == 0) {
+    return CUBEB_ERROR;
+  }
+
+  return CUBEB_OK;
+}
+
+static int
+opensl_get_min_latency(cubeb * ctx, cubeb_stream_params params, uint32_t * latency_ms)
+{
+  /* https://android.googlesource.com/platform/ndk.git/+/master/docs/opensles/index.html
+   * We don't want to deal with JNI here (and we don't have Java on b2g anyways),
+   * so we just dlopen the library and get the two symbols we need. */
+
+  int rv;
+  void * libmedia;
+  size_t (*get_primary_output_frame_count)(void);
+  int (*get_output_frame_count)(size_t * frameCount, int streamType);
+  uint32_t primary_sampling_rate;
+  size_t primary_buffer_size;
+
+  rv = opensl_get_preferred_sample_rate(ctx, &primary_sampling_rate);
+
+  if (rv) {
+    return CUBEB_ERROR;
+  }
+
+  libmedia = dlopen("libmedia.so", RTLD_LAZY);
+  if (!libmedia) {
+    return CUBEB_ERROR;
+  }
+
+  /* JB variant */
+  /* size_t AudioSystem::getPrimaryOutputFrameCount(void) */
+  get_primary_output_frame_count =
+    dlsym(libmedia, "_ZN7android11AudioSystem26getPrimaryOutputFrameCountEv");
+  if (!get_primary_output_frame_count) {
+    /* ICS variant */
+    /* status_t AudioSystem::getOutputFrameCount(int* frameCount, int streamType) */
+    get_output_frame_count =
+      dlsym(libmedia, "_ZN7android11AudioSystem19getOutputFrameCountEPii");
+    if (!get_output_frame_count) {
+      dlclose(libmedia);
+      return CUBEB_ERROR;
+    }
+  }
+
+  if (get_primary_output_frame_count) {
+    primary_buffer_size = get_primary_output_frame_count();
+  } else {
+    if (get_output_frame_count(&primary_buffer_size, params.stream_type) != 0) {
+      return CUBEB_ERROR;
+    }
+  }
+
+  /* To get a fast track in Android's mixer, we need to be at the native
+   * samplerate, which is device dependant. Some devices might be able to
+   * resample when playing a fast track, but it's pretty rare. */
+  *latency_ms = NBUFS * primary_buffer_size / (primary_sampling_rate / 1000);
+
+  dlclose(libmedia);
+
+  return CUBEB_OK;
+}
+
+static void
+opensl_destroy(cubeb * ctx)
+{
+  if (ctx->outmixObj)
+    (*ctx->outmixObj)->Destroy(ctx->outmixObj);
+  if (ctx->engObj)
+    (*ctx->engObj)->Destroy(ctx->engObj);
+  dlclose(ctx->lib);
+  dlclose(ctx->libmedia);
+  free(ctx);
+}
+
+static void opensl_stream_destroy(cubeb_stream * stm);
+
+static int
+opensl_stream_init(cubeb * ctx, cubeb_stream ** stream, char const * stream_name,
+                  cubeb_stream_params stream_params, unsigned int latency,
+                  cubeb_data_callback data_callback, cubeb_state_callback state_callback,
+                  void * user_ptr)
+{
+  cubeb_stream * stm;
+
+  assert(ctx);
+
+  *stream = NULL;
+
+  if (stream_params.rate < 8000 || stream_params.rate > 88200 ||
+      stream_params.channels < 1 || stream_params.channels > 32 ||
+      latency < 1 || latency > 2000) {
+    return CUBEB_ERROR_INVALID_FORMAT;
+  }
+
+  SLDataFormat_PCM format;
+
+  format.formatType = SL_DATAFORMAT_PCM;
+  format.numChannels = stream_params.channels;
+  // samplesPerSec is in milliHertz
+  format.samplesPerSec = stream_params.rate * 1000;
+  format.bitsPerSample = SL_PCMSAMPLEFORMAT_FIXED_16;
+  format.containerSize = SL_PCMSAMPLEFORMAT_FIXED_16;
+  format.channelMask = stream_params.channels == 1 ?
+                       SL_SPEAKER_FRONT_CENTER :
+                       SL_SPEAKER_FRONT_LEFT | SL_SPEAKER_FRONT_RIGHT;
+
+  switch (stream_params.format) {
+  case CUBEB_SAMPLE_S16LE:
+    format.endianness = SL_BYTEORDER_LITTLEENDIAN;
+    break;
+  case CUBEB_SAMPLE_S16BE:
+    format.endianness = SL_BYTEORDER_BIGENDIAN;
+    break;
+  default:
+    return CUBEB_ERROR_INVALID_FORMAT;
+  }
+
+  stm = calloc(1, sizeof(*stm));
+  assert(stm);
+
+  stm->context = ctx;
+  stm->data_callback = data_callback;
+  stm->state_callback = state_callback;
+  stm->user_ptr = user_ptr;
+
+  stm->stream_type = stream_params.stream_type;
+  stm->framesize = stream_params.channels * sizeof(int16_t);
+  stm->bytespersec = stream_params.rate * stm->framesize;
+  stm->queuebuf_len = (stm->bytespersec * latency) / (1000 * NBUFS);
+  // round up to the next multiple of stm->framesize, if needed.
+  if (stm->queuebuf_len % stm->framesize) {
+    stm->queuebuf_len += stm->framesize - (stm->queuebuf_len % stm->framesize);
+  }
+  int i;
+  for (i = 0; i < NBUFS; i++) {
+    stm->queuebuf[i] = malloc(stm->queuebuf_len);
+    assert(stm->queuebuf[i]);
+  }
+
+  SLDataLocator_BufferQueue loc_bufq;
+  loc_bufq.locatorType = SL_DATALOCATOR_BUFFERQUEUE;
+  loc_bufq.numBuffers = NBUFS;
+  SLDataSource source;
+  source.pLocator = &loc_bufq;
+  source.pFormat = &format;
+
+  SLDataLocator_OutputMix loc_outmix;
+  loc_outmix.locatorType = SL_DATALOCATOR_OUTPUTMIX;
+  loc_outmix.outputMix = ctx->outmixObj;
+  SLDataSink sink;
+  sink.pLocator = &loc_outmix;
+  sink.pFormat = NULL;
+
+#if defined(__ANDROID__)
+  const SLInterfaceID ids[] = {ctx->SL_IID_BUFFERQUEUE, ctx->SL_IID_ANDROIDCONFIGURATION};
+  const SLboolean req[] = {SL_BOOLEAN_TRUE, SL_BOOLEAN_TRUE};
+#else
+  const SLInterfaceID ids[] = {ctx->SL_IID_BUFFERQUEUE};
+  const SLboolean req[] = {SL_BOOLEAN_TRUE};
+#endif
+  assert(NELEMS(ids) == NELEMS(req));
+  SLresult res = (*ctx->eng)->CreateAudioPlayer(ctx->eng, &stm->playerObj,
+                                                &source, &sink, NELEMS(ids), ids, req);
+  if (res != SL_RESULT_SUCCESS) {
+    opensl_stream_destroy(stm);
+    return CUBEB_ERROR;
+  }
+
+#if defined(__ANDROID__)
+  SLuint32 stream_type = convert_stream_type_to_sl_stream(stream_params.stream_type);
+  if (stream_type != 0xFFFFFFFF) {
+    SLAndroidConfigurationItf playerConfig;
+    res = (*stm->playerObj)->GetInterface(stm->playerObj,
+          ctx->SL_IID_ANDROIDCONFIGURATION, &playerConfig);
+    res = (*playerConfig)->SetConfiguration(playerConfig,
+          SL_ANDROID_KEY_STREAM_TYPE, &stream_type, sizeof(SLint32));
+    if (res != SL_RESULT_SUCCESS) {
+      opensl_stream_destroy(stm);
+      return CUBEB_ERROR;
+    }
+  }
+#endif
+
+  res = (*stm->playerObj)->Realize(stm->playerObj, SL_BOOLEAN_FALSE);
+  if (res != SL_RESULT_SUCCESS) {
+    opensl_stream_destroy(stm);
+    return CUBEB_ERROR;
+  }
+
+  res = (*stm->playerObj)->GetInterface(stm->playerObj, ctx->SL_IID_PLAY, &stm->play);
+  if (res != SL_RESULT_SUCCESS) {
+    opensl_stream_destroy(stm);
+    return CUBEB_ERROR;
+  }
+
+  res = (*stm->playerObj)->GetInterface(stm->playerObj, ctx->SL_IID_BUFFERQUEUE,
+                                    &stm->bufq);
+  if (res != SL_RESULT_SUCCESS) {
+    opensl_stream_destroy(stm);
+    return CUBEB_ERROR;
+  }
+
+  res = (*stm->bufq)->RegisterCallback(stm->bufq, bufferqueue_callback, stm);
+  if (res != SL_RESULT_SUCCESS) {
+    opensl_stream_destroy(stm);
+    return CUBEB_ERROR;
+  }
+
+  *stream = stm;
+  return CUBEB_OK;
+}
+
+static void
+opensl_stream_destroy(cubeb_stream * stm)
+{
+  if (stm->playerObj)
+    (*stm->playerObj)->Destroy(stm->playerObj);
+  int i;
+  for (i = 0; i < NBUFS; i++) {
+    free(stm->queuebuf[i]);
+  }
+
+  free(stm);
+}
+
+static int
+opensl_stream_start(cubeb_stream * stm)
+{
+  /* To refill the queues before starting playback in order to avoid racing
+  * with refills started by SetPlayState on OpenSLES ndk threads. */
+  bufferqueue_callback(NULL, stm);
+  SLresult res = (*stm->play)->SetPlayState(stm->play, SL_PLAYSTATE_PLAYING);
+  if (res != SL_RESULT_SUCCESS)
+    return CUBEB_ERROR;
+  stm->state_callback(stm, stm->user_ptr, CUBEB_STATE_STARTED);
+  return CUBEB_OK;
+}
+
+static int
+opensl_stream_stop(cubeb_stream * stm)
+{
+  SLresult res = (*stm->play)->SetPlayState(stm->play, SL_PLAYSTATE_PAUSED);
+  if (res != SL_RESULT_SUCCESS)
+    return CUBEB_ERROR;
+  stm->state_callback(stm, stm->user_ptr, CUBEB_STATE_STOPPED);
+  return CUBEB_OK;
+}
+
+static int
+opensl_stream_get_position(cubeb_stream * stm, uint64_t * position)
+{
+  SLmillisecond msec;
+  uint64_t samplerate;
+  SLresult res;
+  int rv;
+  uint32_t mixer_latency;
+
+  res = (*stm->play)->GetPosition(stm->play, &msec);
+  if (res != SL_RESULT_SUCCESS)
+    return CUBEB_ERROR;
+
+  samplerate = stm->bytespersec / stm->framesize;
+
+  rv = stm->context->get_output_latency(&mixer_latency, stm->stream_type);
+  if (rv) {
+    return CUBEB_ERROR;
+  }
+
+  if (msec > mixer_latency) {
+    *position = samplerate * (msec - mixer_latency) / 1000;
+  } else {
+    *position = 0;
+  }
+  return CUBEB_OK;
+}
+
+int
+opensl_stream_get_latency(cubeb_stream * stm, uint32_t * latency)
+{
+  int rv;
+  uint32_t mixer_latency;
+  uint32_t samplerate;
+
+  /* The latency returned by AudioFlinger is in ms, so we have to get
+   * AudioFlinger's samplerate to convert it to frames. */
+  rv = opensl_get_preferred_sample_rate(stm->context, &samplerate);
+  if (rv) {
+    return CUBEB_ERROR;
+  }
+
+  /* audio_stream_type_t is an int, so this is okay. */
+  rv = stm->context->get_output_latency(&mixer_latency, stm->stream_type);
+  if (rv) {
+    return CUBEB_ERROR;
+  }
+
+  *latency = NBUFS * stm->queuebuf_len / stm->framesize + // OpenSL latency
+             mixer_latency * samplerate / 1000; // AudioFlinger latency
+
+  return CUBEB_OK;
+}
+
+static struct cubeb_ops const opensl_ops = {
+  .init = opensl_init,
+  .get_backend_id = opensl_get_backend_id,
+  .get_max_channel_count = opensl_get_max_channel_count,
+  .get_min_latency = opensl_get_min_latency,
+  .get_preferred_sample_rate = opensl_get_preferred_sample_rate,
+  .destroy = opensl_destroy,
+  .stream_init = opensl_stream_init,
+  .stream_destroy = opensl_stream_destroy,
+  .stream_start = opensl_stream_start,
+  .stream_stop = opensl_stream_stop,
+  .stream_get_position = opensl_stream_get_position,
+  .stream_get_latency = opensl_stream_get_latency
+};