C++ (Cpp) gstbt_audio_tempo_context_get_tempo示例

示例#1

文件： audiosynth.c 项目： Buzztrax/buzztrax

static void
gstbt_audio_synth_set_context (GstElement * element, GstContext * context)
{
  GstBtAudioSynth *self = GSTBT_AUDIO_SYNTH (element);
  guint bpm, tpb, stpb;

  if (gstbt_audio_tempo_context_get_tempo (context, &bpm, &tpb, &stpb)) {
    if (self->beats_per_minute != bpm ||
        self->ticks_per_beat != tpb || self->subticks_per_beat != stpb) {
      self->beats_per_minute = bpm;
      self->ticks_per_beat = tpb;
      self->subticks_per_beat = stpb;

      GST_INFO_OBJECT (self, "audio tempo context: bmp=%u, tpb=%u, stpb=%u",
          bpm, tpb, stpb);

      gstbt_audio_synth_calculate_buffer_frames (self);
    }
  }
#if GST_CHECK_VERSION (1,8,0)
  GST_ELEMENT_CLASS (gstbt_audio_synth_parent_class)->set_context (element,
      context);
#else
  if (GST_ELEMENT_CLASS (gstbt_audio_synth_parent_class)->set_context) {
    GST_ELEMENT_CLASS (gstbt_audio_synth_parent_class)->set_context (element,
        context);
  }
#endif
}

示例#2

static void
gstbt_bml_src_set_context (GstElement * element, GstContext * context)
{
  guint bpm, tpb, stpb;

  if (gstbt_audio_tempo_context_get_tempo (context, &bpm, &tpb, &stpb)) {
    GstBML *bml = GST_BML (GST_BML_TRANSFORM (element));

    bml (gstbml_tempo_change_tempo (G_OBJECT (element), bml, bpm, tpb, stpb));
  }
#if GST_CHECK_VERSION (1,8,0)
  GST_ELEMENT_CLASS (parent_class)->set_context (element, context);
#else
  if (GST_ELEMENT_CLASS (parent_class)->set_context) {
    GST_ELEMENT_CLASS (parent_class)->set_context (element, context);
  }
#endif
}