C++ (Cpp) cst_wave_resample示例

示例#1

文件： gstflitetestsrc.c 项目： Distrotech/gst-plugins-bad

static GstFlowReturn
gst_flite_test_src_create (GstBaseSrc * basesrc, guint64 offset,
    guint length, GstBuffer ** buffer)
{
  GstFliteTestSrc *src;
  int n_bytes;

  src = GST_FLITE_TEST_SRC (basesrc);

  n_bytes = src->info.channels * sizeof (gint16) * src->samples_per_buffer;

  while (gst_adapter_available (src->adapter) < n_bytes) {
    GstBuffer *buf;
    char *text;
    int i;
    GstMapInfo map;
    gint16 *data;
    cst_wave *wave;
    gsize size;

    text = get_channel_name (src, src->channel);

    wave = flite_text_to_wave (text, src->voice);
    g_free (text);
    cst_wave_resample (wave, src->info.rate);

    GST_DEBUG ("type %s, sample_rate %d, num_samples %d, num_channels %d",
        wave->type, wave->sample_rate, wave->num_samples, wave->num_channels);

    size = src->info.channels * sizeof (gint16) * wave->num_samples;
    buf = gst_buffer_new_and_alloc (size);

    gst_buffer_map (buf, &map, GST_MAP_WRITE);
    data = (gint16 *) map.data;
    memset (data, 0, size);
    for (i = 0; i < wave->num_samples; i++) {
      data[i * src->info.channels + src->channel] = wave->samples[i];
    }
    gst_buffer_unmap (buf, &map);

    src->channel++;
    if (src->channel == src->info.channels) {
      src->channel = 0;
    }

    gst_adapter_push (src->adapter, buf);
  }

  *buffer = gst_adapter_take_buffer (src->adapter, n_bytes);

  return GST_FLOW_OK;
}

示例#2

文件： flite.c 项目： Angeldude/pd

/*--------------------------------------------------------------------
 * flite_synth : synthesize current text-buffer
 *--------------------------------------------------------------------*/
void flite_synth(t_flite *x) {
  cst_wave *wave;
  int i,vecsize;
  t_garray *a;
  t_float *vec;

# ifdef FLITE_DEBUG
  post("flite: got message 'synth'");
# endif

  // -- sanity checks
  if (!(a = (t_garray *)pd_findbyclass(x->x_arrayname, garray_class))) {
    pd_error(x,"flite: no such array '%s'", x->x_arrayname->s_name);
    return;
  }
  if (!x->textbuf) {
    pd_error(x,"flite: attempt to synthesize empty text-buffer!");
    return;
  }

# ifdef FLITE_DEBUG
  post("flite: flite_text_to_wave()");
# endif
  wave = flite_text_to_wave(x->textbuf,voice);

  if (!wave) {
    pd_error(x,"flite: synthesis failed for text '%s'", x->textbuf);
    return;
  }

  // -- resample
# ifdef FLITE_DEBUG
  post("flite: cst_wave_resample()");
# endif
  cst_wave_resample(wave,sys_getsr());

  // -- resize & write to our array
# ifdef FLITE_DEBUG
  post("flite: garray_resize(%d)", wave->num_samples);
# endif

  garray_resize(a, wave->num_samples);
  if (!garray_getfloatarray(a, &vecsize, &vec))
    pd_error(x,"flite: bad template for write to array '%s'", x->x_arrayname->s_name);

# ifdef FLITE_DEBUG
  post("flite: ->write to garray loop<-");
# endif
  for (i = 0; i < wave->num_samples; i++) {
    *vec++ = wave->samples[i]/32767.0;
  }

  // -- outlet synth-done-bang
  outlet_bang(x->x_obj.ob_outlet);

  // -- cleanup
  delete_wave(wave);

  // -- redraw
  garray_redraw(a);
}