static gboolean
audioresample_transform_size (GstBaseTransform * base,
GstPadDirection direction, GstCaps * caps, guint size, GstCaps * othercaps,
guint * othersize)
{
GstAudioresample *audioresample = GST_AUDIORESAMPLE (base);
ResampleState *state;
GstCaps *srccaps, *sinkcaps;
gboolean use_internal = FALSE; /* whether we use the internal state */
gboolean ret = TRUE;
GST_LOG_OBJECT (base, "asked to transform size %d in direction %s",
size, direction == GST_PAD_SINK ? "SINK" : "SRC");
if (direction == GST_PAD_SINK) {
sinkcaps = caps;
srccaps = othercaps;
} else {
sinkcaps = othercaps;
srccaps = caps;
}
/* if the caps are the ones that _set_caps got called with; we can use
* our own state; otherwise we'll have to create a state */
if (gst_caps_is_equal (sinkcaps, audioresample->sinkcaps) &&
gst_caps_is_equal (srccaps, audioresample->srccaps)) {
use_internal = TRUE;
state = audioresample->resample;
} else {
GST_DEBUG_OBJECT (audioresample,
"caps are not the set caps, creating state");
state = resample_new ();
resample_set_filter_length (state, audioresample->filter_length);
resample_set_state_from_caps (state, sinkcaps, srccaps, NULL, NULL, NULL);
}
if (direction == GST_PAD_SINK) {
/* asked to convert size of an incoming buffer */
*othersize = resample_get_output_size_for_input (state, size);
} else {
/* asked to convert size of an outgoing buffer */
*othersize = resample_get_input_size_for_output (state, size);
}
g_assert (*othersize % state->sample_size == 0);
/* we make room for one extra sample, given that the resampling filter
* can output an extra one for non-integral i_rate/o_rate */
GST_LOG_OBJECT (base, "transformed size %d to %d", size, *othersize);
if (!use_internal) {
resample_free (state);
}
return ret;
}
/* vmethods */
static gboolean
audioresample_start (GstBaseTransform * base)
{
GstAudioresample *audioresample = GST_AUDIORESAMPLE (base);
audioresample->resample = resample_new ();
audioresample->ts_offset = -1;
audioresample->offset = -1;
audioresample->next_ts = -1;
resample_set_filter_length (audioresample->resample,
audioresample->filter_length);
return TRUE;
}
/* vmethods */
static gboolean
legacyresample_start (GstBaseTransform * base)
{
GstLegacyresample *legacyresample = GST_LEGACYRESAMPLE (base);
legacyresample->resample = resample_new ();
legacyresample->ts_offset = -1;
legacyresample->offset = -1;
legacyresample->next_ts = -1;
resample_set_filter_length (legacyresample->resample,
legacyresample->filter_length);
return TRUE;
}
