static GstFlowReturn
gst_jp2k_decimator_decimate_jpc (GstJP2kDecimator * self, GstBuffer * inbuf,
GstBuffer ** outbuf_)
{
GstBuffer *outbuf = NULL;
GstFlowReturn ret = GST_FLOW_OK;
GstMapInfo info;
GstByteReader reader;
GstByteWriter writer;
MainHeader main_header;
if (!gst_buffer_map (inbuf, &info, GST_MAP_READ)) {
GST_ELEMENT_ERROR (self, STREAM, WRONG_TYPE, ("Unable to map memory"),
(NULL));
gst_buffer_unref (inbuf);
return GST_FLOW_ERROR;
}
gst_byte_reader_init (&reader, info.data, info.size);
gst_byte_writer_init_with_size (&writer, gst_buffer_get_size (inbuf), FALSE);
/* main header */
memset (&main_header, 0, sizeof (MainHeader));
ret = parse_main_header (self, &reader, &main_header);
if (ret != GST_FLOW_OK)
goto done;
ret = decimate_main_header (self, &main_header);
if (ret != GST_FLOW_OK)
goto done;
ret = write_main_header (self, &writer, &main_header);
if (ret != GST_FLOW_OK)
goto done;
outbuf = gst_byte_writer_reset_and_get_buffer (&writer);
gst_buffer_copy_into (outbuf, inbuf, GST_BUFFER_COPY_METADATA, 0, -1);
GST_DEBUG_OBJECT (self,
"Decimated buffer from %" G_GSIZE_FORMAT " bytes to %" G_GSIZE_FORMAT
" bytes (%.2lf%%)",
gst_buffer_get_size (inbuf), gst_buffer_get_size (outbuf),
(100 * gst_buffer_get_size (outbuf)) /
((gdouble) gst_buffer_get_size (inbuf)));
done:
gst_buffer_unmap (inbuf, &info);
*outbuf_ = outbuf;
reset_main_header (self, &main_header);
gst_buffer_unref (inbuf);
return ret;
}
static GstFlowReturn
gst_jp2k_decimator_decimate_jpc (GstJP2kDecimator * self, GstBuffer * inbuf,
GstBuffer ** outbuf_)
{
GstBuffer *outbuf = NULL;
GstFlowReturn ret = GST_FLOW_OK;
GstByteReader reader = GST_BYTE_READER_INIT_FROM_BUFFER (inbuf);
GstByteWriter writer;
MainHeader main_header;
gst_byte_writer_init_with_size (&writer, GST_BUFFER_SIZE (inbuf), FALSE);
/* main header */
memset (&main_header, 0, sizeof (MainHeader));
ret = parse_main_header (self, &reader, &main_header);
if (ret != GST_FLOW_OK)
goto done;
ret = decimate_main_header (self, &main_header);
if (ret != GST_FLOW_OK)
goto done;
ret = write_main_header (self, &writer, &main_header);
if (ret != GST_FLOW_OK)
goto done;
outbuf = gst_byte_writer_reset_and_get_buffer (&writer);
gst_buffer_copy_metadata (outbuf, inbuf, GST_BUFFER_COPY_ALL);
GST_DEBUG_OBJECT (self,
"Decimated buffer from %u bytes to %u bytes (%.2lf%%)",
GST_BUFFER_SIZE (inbuf), GST_BUFFER_SIZE (outbuf),
(100 * GST_BUFFER_SIZE (outbuf)) / ((gdouble) GST_BUFFER_SIZE (inbuf)));
done:
*outbuf_ = outbuf;
reset_main_header (self, &main_header);
gst_buffer_unref (inbuf);
return ret;
}