mxftypes: Add function to serialize an index table segment to a buffer

1 files changed, 120 insertions, 0 deletions

diff --git a/gst/mxf/mxftypes.c b/gst/mxf/mxftypes.c
index 60e96ca81..9ef3294d4 100644
--- a/gst/mxf/mxftypes.c
+++ b/gst/mxf/mxftypes.c
@@ -22,6 +22,7 @@
 #endif
 
 #include <gst/gst.h>
+#include <gst/base/gstbytewriter.h>
 #include <string.h>
 
 #include "mxftypes.h"
@@ -1299,6 +1300,125 @@ mxf_index_table_segment_reset (MXFIndexTableSegment * segment)
   memset (segment, 0, sizeof (MXFIndexTableSegment));
 }
 
+GstBuffer *
+mxf_index_table_segment_to_buffer (const MXFIndexTableSegment * segment)
+{
+  guint len, slen, i;
+  guint8 ber[9];
+  GstBuffer *ret;
+  GstMapInfo map;
+  GstByteWriter bw;
+
+  g_return_val_if_fail (segment != NULL, NULL);
+  g_return_val_if_fail (segment->n_delta_entries * 6 < G_MAXUINT16, NULL);
+  g_return_val_if_fail (segment->n_index_entries * (11 +
+          4 * segment->slice_count + 8 * segment->pos_table_count) <
+      G_MAXUINT16, NULL);
+
+  len =
+      16 + 4 + 8 + 4 + 8 + 4 + 8 + 4 + 4 + 4 + 4 + 4 + 4 + 4 + 1 + 4 + 1 + 4 +
+      4 + 8 + segment->n_delta_entries * 6 + 4 + 8 +
+      segment->n_index_entries * (11 + 4 * segment->slice_count +
+      8 * segment->pos_table_count);
+  slen = mxf_ber_encode_size (len, ber);
+
+  ret = gst_buffer_new_and_alloc (16 + slen + len);
+  gst_buffer_map (ret, &map, GST_MAP_WRITE);
+
+  gst_byte_writer_init_with_data (&bw, map.data, map.size, FALSE);
+
+  gst_byte_writer_put_data_unchecked (&bw,
+      (const guint8 *) MXF_UL (INDEX_TABLE_SEGMENT), 16);
+  gst_byte_writer_put_data_unchecked (&bw, ber, slen);
+
+  gst_byte_writer_put_uint16_be_unchecked (&bw, 0x3c0a);
+  gst_byte_writer_put_uint16_be_unchecked (&bw, 16);
+  gst_byte_writer_put_data_unchecked (&bw,
+      (const guint8 *) &segment->instance_id, 16);
+
+  gst_byte_writer_put_uint16_be_unchecked (&bw, 0x3f0b);
+  gst_byte_writer_put_uint16_be_unchecked (&bw, 8);
+  gst_byte_writer_put_uint32_be_unchecked (&bw, segment->index_edit_rate.n);
+  gst_byte_writer_put_uint32_be_unchecked (&bw, segment->index_edit_rate.d);
+
+  gst_byte_writer_put_uint16_be_unchecked (&bw, 0x3f0c);
+  gst_byte_writer_put_uint16_be_unchecked (&bw, 8);
+  gst_byte_writer_put_uint64_be_unchecked (&bw, segment->index_start_position);
+
+  gst_byte_writer_put_uint16_be_unchecked (&bw, 0x3f0d);
+  gst_byte_writer_put_uint16_be_unchecked (&bw, 8);
+  gst_byte_writer_put_uint64_be_unchecked (&bw, segment->index_duration);
+
+  gst_byte_writer_put_uint16_be_unchecked (&bw, 0x3f05);
+  gst_byte_writer_put_uint16_be_unchecked (&bw, 4);
+  gst_byte_writer_put_uint32_be_unchecked (&bw, segment->edit_unit_byte_count);
+
+  gst_byte_writer_put_uint16_be_unchecked (&bw, 0x3f06);
+  gst_byte_writer_put_uint16_be_unchecked (&bw, 4);
+  gst_byte_writer_put_uint32_be_unchecked (&bw, segment->index_sid);
+
+  gst_byte_writer_put_uint16_be_unchecked (&bw, 0x3f07);
+  gst_byte_writer_put_uint16_be_unchecked (&bw, 4);
+  gst_byte_writer_put_uint32_be_unchecked (&bw, segment->body_sid);
+
+  gst_byte_writer_put_uint16_be_unchecked (&bw, 0x3f08);
+  gst_byte_writer_put_uint16_be_unchecked (&bw, 1);
+  gst_byte_writer_put_uint8 (&bw, segment->slice_count);
+
+  gst_byte_writer_put_uint16_be_unchecked (&bw, 0x3f0e);
+  gst_byte_writer_put_uint16_be_unchecked (&bw, 1);
+  gst_byte_writer_put_uint8 (&bw, segment->pos_table_count);
+
+  gst_byte_writer_put_uint16_be_unchecked (&bw, 0x3f09);
+  gst_byte_writer_put_uint16_be_unchecked (&bw,
+      8 + segment->n_delta_entries * 6);
+  gst_byte_writer_put_uint32_be_unchecked (&bw, segment->n_delta_entries);
+  gst_byte_writer_put_uint32_be_unchecked (&bw, 6);
+  for (i = 0; i < segment->n_delta_entries; i++) {
+    gst_byte_writer_put_uint8_unchecked (&bw,
+        segment->delta_entries[i].pos_table_index);
+    gst_byte_writer_put_uint8_unchecked (&bw, segment->delta_entries[i].slice);
+    gst_byte_writer_put_uint32_be_unchecked (&bw,
+        segment->delta_entries[i].element_delta);
+  }
+
+  gst_byte_writer_put_uint16_be_unchecked (&bw, 0x3f0a);
+  gst_byte_writer_put_uint16_be_unchecked (&bw,
+      8 + segment->n_index_entries * (11 + 4 * segment->slice_count +
+          8 * segment->pos_table_count));
+  gst_byte_writer_put_uint32_be_unchecked (&bw, segment->n_index_entries);
+  gst_byte_writer_put_uint32_be_unchecked (&bw,
+      (11 + 4 * segment->slice_count + 8 * segment->pos_table_count));
+  for (i = 0; i < segment->n_index_entries; i++) {
+    guint j;
+
+    gst_byte_writer_put_uint8_unchecked (&bw,
+        segment->index_entries[i].temporal_offset);
+    gst_byte_writer_put_uint8_unchecked (&bw,
+        segment->index_entries[i].key_frame_offset);
+    gst_byte_writer_put_uint8_unchecked (&bw, segment->index_entries[i].flags);
+    gst_byte_writer_put_uint64_be_unchecked (&bw,
+        segment->index_entries[i].stream_offset);
+
+    for (j = 0; j < segment->slice_count; j++)
+      gst_byte_writer_put_uint32_be_unchecked (&bw,
+          segment->index_entries[i].slice_offset[j]);
+
+    for (j = 0; j < segment->pos_table_count; j++) {
+      gst_byte_writer_put_uint32_be_unchecked (&bw,
+          segment->index_entries[i].pos_table[j].n);
+      gst_byte_writer_put_uint32_be_unchecked (&bw,
+          segment->index_entries[i].pos_table[j].d);
+    }
+  }
+
+  g_assert (gst_byte_writer_get_pos (&bw) == map.size);
+
+  gst_buffer_unmap (ret, &map);
+
+  return ret;
+}
+
 /* SMPTE 377M 8.2 Table 1 and 2 */
 
 static void