static gboolean
gst_audio_filter_template_setup (GstAudioFilter * filter,
const GstAudioInfo * info)
{
GstAudioFilterTemplate *filter_template;
GstAudioFormat fmt;
gint chans, rate;
filter_template = GST_AUDIO_FILTER_TEMPLATE (filter);
rate = GST_AUDIO_INFO_RATE (info);
chans = GST_AUDIO_INFO_CHANNELS (info);
fmt = GST_AUDIO_INFO_FORMAT (info);
GST_INFO_OBJECT (filter_template, "format %d (%s), rate %d, %d channels",
fmt, GST_AUDIO_INFO_NAME (info), rate, chans);
/* if any setup needs to be done (like memory allocated), do it here */
/* The audio filter base class also saves the audio info in
* GST_AUDIO_FILTER_INFO(filter) so it's automatically available
* later from there as well */
return TRUE;
}
static gboolean
gst_audio_filter_template_setup (GstAudioFilter * filter,
GstRingBufferSpec * spec)
{
GstAudioFilterTemplate *audio_filter_template;
audio_filter_template = GST_AUDIO_FILTER_TEMPLATE (filter);
/* if any setup needs to be done, do it here */
return TRUE; /* it's all good */
}
static void
gst_audio_filter_template_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec)
{
GstAudioFilterTemplate *filter = GST_AUDIO_FILTER_TEMPLATE (object);
GST_OBJECT_LOCK (filter);
switch (prop_id) {
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
GST_OBJECT_UNLOCK (filter);
}
static GstFlowReturn
gst_audio_filter_template_filter_inplace (GstBaseTransform * base_transform,
GstBuffer * buf)
{
GstAudioFilterTemplate *audio_filter_template;
GstAudioFilter *audiofilter;
audiofilter = GST_AUDIO_FILTER (base_transform);
audio_filter_template = GST_AUDIO_FILTER_TEMPLATE (base_transform);
/* do something interesting here. This simply copies the source
* to the destination. */
return GST_FLOW_OK;
}
static GstFlowReturn
gst_audio_filter_template_filter (GstBaseTransform * base_transform,
GstBuffer * inbuf, GstBuffer * outbuf)
{
GstAudioFilterTemplate *audio_filter_template;
GstAudioFilter *audiofilter;
audiofilter = GST_AUDIO_FILTER (base_transform);
audio_filter_template = GST_AUDIO_FILTER_TEMPLATE (base_transform);
/* do something interesting here. This simply copies the source
* to the destination. */
memcpy (GST_BUFFER_DATA (outbuf), GST_BUFFER_DATA (inbuf),
GST_BUFFER_SIZE (inbuf));
return GST_FLOW_OK;
}
static GstFlowReturn
gst_audio_filter_template_filter_inplace (GstBaseTransform * base_transform,
GstBuffer * buf)
{
GstAudioFilterTemplate *filter = GST_AUDIO_FILTER_TEMPLATE (base_transform);
GstFlowReturn flow = GST_FLOW_OK;
GstMapInfo map;
GST_LOG_OBJECT (filter, "transform buffer in place");
/* FIXME: do something interesting here. Doing nothing means the input
* buffer is simply pushed out as is without any modification */
if (gst_buffer_map (buf, &map, GST_MAP_READWRITE)) {
#if 0
switch (GST_AUDIO_FILTER_FORMAT (filter)) {
case GST_AUDIO_FORMAT_S16LE:
case GST_AUDIO_FORMAT_S16BE: {
gint16 *samples = map.data;
guint n_samples = map.size / sizeof (gint16);
guint i;
for (i = 0; i < n; ++n) {
samples[i] = samples[i];
}
break;
}
default:
g_warning ("Unexpected audio format %s!",
GST_AUDIO_INFO_NAME (GST_AUDIO_FILTER_INFO(filter)));
flow = GST_FLOW_ERROR;
break;
}
#endif
gst_buffer_unmap (buf, &map);
}
return flow;
}
static GstFlowReturn
gst_audio_filter_template_filter (GstBaseTransform * base_transform,
GstBuffer * inbuf, GstBuffer * outbuf)
{
GstAudioFilterTemplate *filter = GST_AUDIO_FILTER_TEMPLATE (base_transform);
GstMapInfo map_in;
GstMapInfo map_out;
GST_LOG_OBJECT (filter, "transform buffer");
/* FIXME: do something interesting here. We simply copy the input data
* to the output buffer for now. */
if (gst_buffer_map (inbuf, &map_in, GST_MAP_READ)) {
if (gst_buffer_map (outbuf, &map_out, GST_MAP_WRITE)) {
g_assert (map_out.size == map_in.size);
memcpy (map_out.data, map_in.data, map_out.size);
gst_buffer_unmap (outbuf, &map_out);
}
gst_buffer_unmap (inbuf, &map_in);
}
return GST_FLOW_OK;
}
