Ejemplos de WildMidi_SampledSeek en C++ (Cpp)

Ejemplo n.º 1

static gboolean
gst_wildmidi_do_seek (GstWildmidi * wildmidi, GstEvent * event)
{
  gdouble rate;
  GstFormat src_format, dst_format;
  GstSeekFlags flags;
  GstSeekType start_type, stop_type;
  gint64 start, stop;
  gboolean flush, update;
#ifdef HAVE_WILDMIDI_0_2_2
  gboolean accurate;
#endif
  gboolean res;
  unsigned long int sample;
  GstSegment *segment;

  if (!wildmidi->song)
    return FALSE;

  gst_event_parse_seek (event, &rate, &src_format, &flags,
      &start_type, &start, &stop_type, &stop);

  /* convert the input format to samples */
  dst_format = GST_FORMAT_DEFAULT;
  res = TRUE;
  if (start_type != GST_SEEK_TYPE_NONE) {
    res =
        gst_wildmidi_src_convert (wildmidi, src_format, start, &dst_format,
        &start);
  }
  if (res && stop_type != GST_SEEK_TYPE_NONE) {
    res =
        gst_wildmidi_src_convert (wildmidi, src_format, stop, &dst_format,
        &stop);
  }
  /* unsupported format */
  if (!res)
    return res;

  flush = ((flags & GST_SEEK_FLAG_FLUSH) == GST_SEEK_FLAG_FLUSH);
#ifdef HAVE_WILDMIDI_0_2_2
  accurate = ((flags & GST_SEEK_FLAG_ACCURATE) == GST_SEEK_FLAG_ACCURATE);
#endif

  if (flush) {
    GST_DEBUG ("performing flush");
    gst_pad_push_event (wildmidi->srcpad, gst_event_new_flush_start ());
  } else {
    gst_pad_stop_task (wildmidi->sinkpad);
  }

  segment = wildmidi->o_segment;

  GST_PAD_STREAM_LOCK (wildmidi->sinkpad);

  if (flush) {
    gst_pad_push_event (wildmidi->srcpad, gst_event_new_flush_stop (TRUE));
  }

  /* update the segment now */
  gst_segment_do_seek (segment, rate, dst_format, flags,
      start_type, start, stop_type, stop, &update);

  /* we need to seek to position in the segment now, sample will be updated */
  sample = segment->position;

  GST_OBJECT_LOCK (wildmidi);
#ifdef HAVE_WILDMIDI_0_2_2
  if (accurate) {
    WildMidi_SampledSeek (wildmidi->song, &sample);
  } else {
    WildMidi_FastSeek (wildmidi->song, &sample);
  }
#else
  WildMidi_FastSeek (wildmidi->song, &sample);
#endif

  GST_OBJECT_UNLOCK (wildmidi);

  segment->start = segment->time = segment->position = sample;

  gst_pad_push_event (wildmidi->srcpad,
      gst_wildmidi_get_new_segment_event (wildmidi, GST_FORMAT_TIME));

  gst_pad_start_task (wildmidi->sinkpad,
      (GstTaskFunction) gst_wildmidi_loop, wildmidi->sinkpad, NULL);

  wildmidi->discont = TRUE;
  GST_PAD_STREAM_UNLOCK (wildmidi->sinkpad);
  GST_DEBUG ("seek done");

  return TRUE;
}

Ejemplo n.º 2

Archivo: wildmidi_decoder_plugin.c Proyecto: OpenInkpot-archive/iplinux-mpd

static void
wildmidi_file_decode(struct decoder *decoder, const char *path_fs)
{
	static const struct audio_format audio_format = {
		.sample_rate = WILDMIDI_SAMPLE_RATE,
		.format = SAMPLE_FORMAT_S16,
		.channels = 2,
	};
	midi *wm;
	const struct _WM_Info *info;
	enum decoder_command cmd;

	wm = WildMidi_Open(path_fs);
	if (wm == NULL)
		return;

	info = WildMidi_GetInfo(wm);
	if (info == NULL) {
		WildMidi_Close(wm);
		return;
	}

	decoder_initialized(decoder, &audio_format, true,
			    info->approx_total_samples / WILDMIDI_SAMPLE_RATE);

	do {
		char buffer[4096];
		int len;

		info = WildMidi_GetInfo(wm);
		if (info == NULL)
			break;

		len = WildMidi_GetOutput(wm, buffer, sizeof(buffer));
		if (len <= 0)
			break;

		cmd = decoder_data(decoder, NULL, buffer, len, 0);

		if (cmd == DECODE_COMMAND_SEEK) {
			unsigned long seek_where = WILDMIDI_SAMPLE_RATE *
				decoder_seek_where(decoder);

			WildMidi_SampledSeek(wm, &seek_where);
			decoder_command_finished(decoder);
			cmd = DECODE_COMMAND_NONE;
		}

	} while (cmd == DECODE_COMMAND_NONE);

	WildMidi_Close(wm);
}

static struct tag *
wildmidi_tag_dup(const char *path_fs)
{
	midi *wm;
	const struct _WM_Info *info;
	struct tag *tag;

	wm = WildMidi_Open(path_fs);
	if (wm == NULL)
		return NULL;

	info = WildMidi_GetInfo(wm);
	if (info == NULL) {
		WildMidi_Close(wm);
		return NULL;
	}

	tag = tag_new();
	tag->time = info->approx_total_samples / WILDMIDI_SAMPLE_RATE;

	WildMidi_Close(wm);

	return tag;
}