static gboolean
gst_audio_panorama_set_caps (GstBaseTransform * base, GstCaps * incaps,
GstCaps * outcaps)
{
GstAudioPanorama *filter = GST_AUDIO_PANORAMA (base);
GstAudioInfo info;
/*GST_INFO ("incaps are %" GST_PTR_FORMAT, incaps); */
if (!gst_audio_info_from_caps (&info, incaps))
goto no_format;
GST_DEBUG ("try to process %d input with %d channels",
GST_AUDIO_INFO_FORMAT (&info), GST_AUDIO_INFO_CHANNELS (&info));
if (!gst_audio_panorama_set_process_function (filter, &info))
goto no_format;
filter->info = info;
return TRUE;
no_format:
{
GST_DEBUG ("invalid caps");
return FALSE;
}
}
static void
gst_audio_panorama_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec)
{
GstAudioPanorama *filter = GST_AUDIO_PANORAMA (object);
switch (prop_id) {
case PROP_PANORAMA:
g_value_set_float (value, filter->panorama);
break;
case PROP_METHOD:
g_value_set_enum (value, filter->method);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static gboolean
gst_audio_panorama_set_caps (GstBaseTransform * base, GstCaps * incaps,
GstCaps * outcaps)
{
GstAudioPanorama *filter = GST_AUDIO_PANORAMA (base);
const GstStructure *structure;
gboolean ret;
gint width;
const gchar *fmt;
/*GST_INFO ("incaps are %" GST_PTR_FORMAT, incaps); */
structure = gst_caps_get_structure (incaps, 0);
ret = gst_structure_get_int (structure, "channels", &filter->channels);
if (!ret)
goto no_channels;
ret = gst_structure_get_int (structure, "width", &width);
if (!ret)
goto no_width;
filter->width = width / 8;
fmt = gst_structure_get_name (structure);
if (!strcmp (fmt, "audio/x-raw-int"))
filter->format_float = FALSE;
else
filter->format_float = TRUE;
GST_DEBUG ("try to process %s input with %d channels", fmt, filter->channels);
ret = gst_audio_panorama_set_process_function (filter);
if (!ret)
GST_WARNING ("can't process input with %d channels", filter->channels);
return ret;
no_channels:
GST_DEBUG ("no channels in caps");
return ret;
no_width:
GST_DEBUG ("no width in caps");
return ret;
}
/* this function does the actual processing
*/
static GstFlowReturn
gst_audio_panorama_transform (GstBaseTransform * base, GstBuffer * inbuf,
GstBuffer * outbuf)
{
GstAudioPanorama *filter = GST_AUDIO_PANORAMA (base);
guint num_samples = GST_BUFFER_SIZE (outbuf) / (2 * filter->width);
if (GST_CLOCK_TIME_IS_VALID (GST_BUFFER_TIMESTAMP (outbuf)))
gst_object_sync_values (G_OBJECT (filter), GST_BUFFER_TIMESTAMP (outbuf));
if (G_UNLIKELY (GST_BUFFER_FLAG_IS_SET (inbuf, GST_BUFFER_FLAG_GAP))) {
GST_BUFFER_FLAG_SET (outbuf, GST_BUFFER_FLAG_GAP);
memset (GST_BUFFER_DATA (outbuf), 0, GST_BUFFER_SIZE (outbuf));
return GST_FLOW_OK;
}
filter->process (filter, GST_BUFFER_DATA (inbuf),
GST_BUFFER_DATA (outbuf), num_samples);
return GST_FLOW_OK;
}
/* this function does the actual processing
*/
static GstFlowReturn
gst_audio_panorama_transform (GstBaseTransform * base, GstBuffer * inbuf,
GstBuffer * outbuf)
{
GstAudioPanorama *filter = GST_AUDIO_PANORAMA (base);
GstClockTime timestamp, stream_time;
GstMapInfo inmap, outmap;
timestamp = GST_BUFFER_TIMESTAMP (inbuf);
stream_time =
gst_segment_to_stream_time (&base->segment, GST_FORMAT_TIME, timestamp);
GST_DEBUG_OBJECT (filter, "sync to %" GST_TIME_FORMAT,
GST_TIME_ARGS (timestamp));
if (GST_CLOCK_TIME_IS_VALID (stream_time))
gst_object_sync_values (GST_OBJECT (filter), stream_time);
gst_buffer_map (inbuf, &inmap, GST_MAP_READ);
gst_buffer_map (outbuf, &outmap, GST_MAP_WRITE);
if (G_UNLIKELY (GST_BUFFER_FLAG_IS_SET (inbuf, GST_BUFFER_FLAG_GAP))) {
GST_BUFFER_FLAG_SET (outbuf, GST_BUFFER_FLAG_GAP);
memset (outmap.data, 0, outmap.size);
} else {
/* output always stereo, input mono or stereo,
* and info describes input format */
guint num_samples = outmap.size / (2 * GST_AUDIO_INFO_BPS (&filter->info));
filter->process (filter, inmap.data, outmap.data, num_samples);
}
gst_buffer_unmap (inbuf, &inmap);
gst_buffer_unmap (outbuf, &outmap);
return GST_FLOW_OK;
}
