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_wavenc_write_tags (GstWavEnc * wavenc)
{
const GstTagList *user_tags;
GstTagList *tags;
guint size;
GstBuffer *buf;
GstByteWriter bw;
g_return_val_if_fail (wavenc != NULL, GST_FLOW_OK);
user_tags = gst_tag_setter_get_tag_list (GST_TAG_SETTER (wavenc));
if ((!wavenc->tags) && (!user_tags)) {
GST_DEBUG_OBJECT (wavenc, "have no tags");
return GST_FLOW_OK;
}
tags =
gst_tag_list_merge (user_tags, wavenc->tags,
gst_tag_setter_get_tag_merge_mode (GST_TAG_SETTER (wavenc)));
GST_DEBUG_OBJECT (wavenc, "writing tags");
gst_byte_writer_init_with_size (&bw, 1024, FALSE);
/* add LIST INFO chunk */
gst_byte_writer_put_data (&bw, (const guint8 *) "LIST", 4);
gst_byte_writer_put_uint32_le (&bw, 0);
gst_byte_writer_put_data (&bw, (const guint8 *) "INFO", 4);
/* add tags */
gst_tag_list_foreach (tags, gst_wavparse_tags_foreach, &bw);
/* sets real size of LIST INFO chunk */
size = gst_byte_writer_get_pos (&bw);
gst_byte_writer_set_pos (&bw, 4);
gst_byte_writer_put_uint32_le (&bw, size - 8);
gst_tag_list_unref (tags);
buf = gst_byte_writer_reset_and_get_buffer (&bw);
wavenc->meta_length += gst_buffer_get_size (buf);
return gst_pad_push (wavenc->srcpad, buf);
}
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;
}
/**
* gst_tag_list_to_exif_buffer_with_tiff_header:
* @taglist: The taglist
*
* Formats the tags in taglist into exif structure, a tiff header
* is put in the beginning of the buffer.
*
* Returns: A GstBuffer containing the data
*
* Since: 0.10.30
*/
GstBuffer *
gst_tag_list_to_exif_buffer_with_tiff_header (const GstTagList * taglist)
{
GstBuffer *ifd;
GstByteWriter writer;
guint size;
ifd = gst_tag_list_to_exif_buffer (taglist, G_BYTE_ORDER, 8);
if (ifd == NULL) {
GST_WARNING ("Failed to create exif buffer");
return NULL;
}
size = TIFF_HEADER_SIZE + GST_BUFFER_SIZE (ifd);
/* TODO what is the correct endianness here? */
gst_byte_writer_init_with_size (&writer, size, FALSE);
/* TIFF header */
if (G_BYTE_ORDER == G_LITTLE_ENDIAN) {
gst_byte_writer_put_uint16_le (&writer, TIFF_LITTLE_ENDIAN);
gst_byte_writer_put_uint16_le (&writer, 42);
gst_byte_writer_put_uint32_le (&writer, 8);
} else {
gst_byte_writer_put_uint16_be (&writer, TIFF_BIG_ENDIAN);
gst_byte_writer_put_uint16_be (&writer, 42);
gst_byte_writer_put_uint32_be (&writer, 8);
}
if (!gst_byte_writer_put_data (&writer, GST_BUFFER_DATA (ifd),
GST_BUFFER_SIZE (ifd))) {
GST_WARNING ("Byte writer size mismatch");
/* reaching here is a programming error because we should have a buffer
* large enough */
g_assert_not_reached ();
gst_buffer_unref (ifd);
gst_byte_writer_reset (&writer);
return NULL;
}
gst_buffer_unref (ifd);
return gst_byte_writer_reset_and_get_buffer (&writer);
}
static GstFlowReturn
gst_h264_parse_pre_push_frame (GstBaseParse * parse, GstBaseParseFrame * frame)
{
GstH264Parse *h264parse;
GstBuffer *buffer;
h264parse = GST_H264_PARSE (parse);
buffer = frame->buffer;
/* periodic SPS/PPS sending */
if (h264parse->interval > 0 || h264parse->push_codec) {
GstClockTime timestamp = GST_BUFFER_TIMESTAMP (buffer);
guint64 diff;
/* init */
if (!GST_CLOCK_TIME_IS_VALID (h264parse->last_report)) {
h264parse->last_report = timestamp;
}
if (h264parse->idr_pos >= 0) {
GST_LOG_OBJECT (h264parse, "IDR nal at offset %d", h264parse->idr_pos);
if (timestamp > h264parse->last_report)
diff = timestamp - h264parse->last_report;
else
diff = 0;
GST_LOG_OBJECT (h264parse,
"now %" GST_TIME_FORMAT ", last SPS/PPS %" GST_TIME_FORMAT,
GST_TIME_ARGS (timestamp), GST_TIME_ARGS (h264parse->last_report));
GST_DEBUG_OBJECT (h264parse,
"interval since last SPS/PPS %" GST_TIME_FORMAT,
GST_TIME_ARGS (diff));
if (GST_TIME_AS_SECONDS (diff) >= h264parse->interval ||
h264parse->push_codec) {
GstBuffer *codec_nal;
gint i;
GstClockTime new_ts;
/* avoid overwriting a perfectly fine timestamp */
new_ts = GST_CLOCK_TIME_IS_VALID (timestamp) ? timestamp :
h264parse->last_report;
if (h264parse->align == GST_H264_PARSE_ALIGN_NAL) {
/* send separate config NAL buffers */
GST_DEBUG_OBJECT (h264parse, "- sending SPS/PPS");
for (i = 0; i < MAX_SPS_COUNT; i++) {
if ((codec_nal = h264parse->params->sps_nals[i])) {
GST_DEBUG_OBJECT (h264parse, "sending SPS nal");
gst_h264_parse_push_codec_buffer (h264parse, codec_nal,
timestamp);
h264parse->last_report = new_ts;
}
}
for (i = 0; i < MAX_PPS_COUNT; i++) {
if ((codec_nal = h264parse->params->pps_nals[i])) {
GST_DEBUG_OBJECT (h264parse, "sending PPS nal");
gst_h264_parse_push_codec_buffer (h264parse, codec_nal,
timestamp);
h264parse->last_report = new_ts;
}
}
} else {
/* insert config NALs into AU */
GstByteWriter bw;
GstBuffer *new_buf;
const gboolean bs = h264parse->format == GST_H264_PARSE_FORMAT_BYTE;
gst_byte_writer_init_with_size (&bw, GST_BUFFER_SIZE (buffer), FALSE);
gst_byte_writer_put_data (&bw, GST_BUFFER_DATA (buffer),
h264parse->idr_pos);
GST_DEBUG_OBJECT (h264parse, "- inserting SPS/PPS");
for (i = 0; i < MAX_SPS_COUNT; i++) {
if ((codec_nal = h264parse->params->sps_nals[i])) {
GST_DEBUG_OBJECT (h264parse, "inserting SPS nal");
gst_byte_writer_put_uint32_be (&bw,
bs ? 1 : GST_BUFFER_SIZE (codec_nal));
gst_byte_writer_put_data (&bw, GST_BUFFER_DATA (codec_nal),
GST_BUFFER_SIZE (codec_nal));
h264parse->last_report = new_ts;
}
}
for (i = 0; i < MAX_PPS_COUNT; i++) {
if ((codec_nal = h264parse->params->pps_nals[i])) {
GST_DEBUG_OBJECT (h264parse, "inserting PPS nal");
gst_byte_writer_put_uint32_be (&bw,
bs ? 1 : GST_BUFFER_SIZE (codec_nal));
gst_byte_writer_put_data (&bw, GST_BUFFER_DATA (codec_nal),
GST_BUFFER_SIZE (codec_nal));
h264parse->last_report = new_ts;
}
}
gst_byte_writer_put_data (&bw,
GST_BUFFER_DATA (buffer) + h264parse->idr_pos,
GST_BUFFER_SIZE (buffer) - h264parse->idr_pos);
/* collect result and push */
new_buf = gst_byte_writer_reset_and_get_buffer (&bw);
gst_buffer_copy_metadata (new_buf, buffer, GST_BUFFER_COPY_ALL);
gst_buffer_replace (&frame->buffer, new_buf);
}
}
/* we pushed whatever we had */
h264parse->push_codec = FALSE;
}
}
gst_h264_parse_reset_frame (h264parse);
return GST_FLOW_OK;
}
