C++ (Cpp) api_jack_port_get_latency_range Exemples

Exemple #1

Fichier : cubeb_jack.cpp Projet : brendandahl/positron

static int
cbjack_graph_order_callback(void * arg)
{
  cubeb * ctx = (cubeb *)arg;
  int i;
  uint32_t rate;

  jack_latency_range_t latency_range;
  jack_nframes_t port_latency, max_latency = 0;

  for (int j = 0; j < MAX_STREAMS; j++) {
    cubeb_stream *stm = &ctx->streams[j];

    if (!stm->in_use)
      continue;
    if (!stm->ports_ready)
      continue;

    for (i = 0; i < (int)stm->out_params.channels; ++i) {
      api_jack_port_get_latency_range(stm->output_ports[i], JackPlaybackLatency, &latency_range);
      port_latency = latency_range.max;
      if (port_latency > max_latency)
          max_latency = port_latency;
    }
    /* Cap minimum latency to 128 frames */
    if (max_latency < 128)
      max_latency = 128;
  }

  if (cbjack_get_preferred_sample_rate(ctx, &rate) == CUBEB_ERROR)
    ctx->jack_latency = (max_latency * 1000) / 48000;
  else
    ctx->jack_latency = (max_latency * 1000) / rate;
  return 0;
}

Exemple #2

Fichier : cubeb_jack.cpp Projet : Anti-Ultimate/dolphin

static int
cbjack_graph_order_callback(void * arg)
{
  cubeb * ctx = (cubeb *)arg;
  int i;
  jack_latency_range_t latency_range;
  jack_nframes_t port_latency, max_latency = 0;

  for (int j = 0; j < MAX_STREAMS; j++) {
    cubeb_stream *stm = &ctx->streams[j];

    if (!stm->in_use)
      continue;
    if (!stm->ports_ready)
      continue;

    for (i = 0; i < (int)stm->out_params.channels; ++i) {
      api_jack_port_get_latency_range(stm->output_ports[i], JackPlaybackLatency, &latency_range);
      port_latency = latency_range.max;
      if (port_latency > max_latency)
          max_latency = port_latency;
    }
    /* Cap minimum latency to 128 frames */
    if (max_latency < 128)
      max_latency = 128;
  }

  ctx->jack_latency = max_latency;

  return 0;
}