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gst/mxf/: Implement parsing of index table segments, which will later be used for seeking.
Original commit message from CVS: * gst/mxf/mxfdemux.c: (gst_mxf_demux_reset), (gst_mxf_demux_handle_index_table_segment): * gst/mxf/mxfdemux.h: * gst/mxf/mxfparse.c: (mxf_index_table_segment_parse), (mxf_index_table_segment_reset): * gst/mxf/mxfparse.h: * gst/mxf/mxftypes.h: Implement parsing of index table segments, which will later be used for seeking.
This commit is contained in:
Sebastian Dröge
parent
6ff76898aa
commit
65587b80f5
12
ChangeLog
12
ChangeLog
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@ -1,3 +1,15 @@
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2008-11-28 Sebastian Dröge <sebastian.droege@collabora.co.uk>
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* gst/mxf/mxfdemux.c: (gst_mxf_demux_reset),
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(gst_mxf_demux_handle_index_table_segment):
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* gst/mxf/mxfdemux.h:
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* gst/mxf/mxfparse.c: (mxf_index_table_segment_parse),
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(mxf_index_table_segment_reset):
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* gst/mxf/mxfparse.h:
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* gst/mxf/mxftypes.h:
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Implement parsing of index table segments, which will later be
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used for seeking.
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2008-11-28 Sebastian Dröge <sebastian.droege@collabora.co.uk>
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* docs/plugins/gst-plugins-bad-plugins.args:
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@ -394,6 +394,17 @@ gst_mxf_demux_reset (GstMXFDemux * demux)
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demux->partition_index = NULL;
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}
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if (demux->index_table) {
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guint i;
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for (i = 0; i < demux->index_table->len; i++)
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mxf_index_table_segment_reset (&g_array_index (demux->index_table,
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MXFIndexTableSegment, i));
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g_array_free (demux->index_table, TRUE);
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demux->index_table = NULL;
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}
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gst_mxf_demux_reset_mxf_state (demux);
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gst_mxf_demux_reset_metadata (demux);
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}
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@ -1280,9 +1291,8 @@ gst_mxf_demux_handle_header_metadata_resolve_references (GstMXFDemux * demux)
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MXFMetadataEssenceContainerData, i);
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for (j = 0; j < demux->content_storage.n_essence_container_data; j++) {
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if (mxf_ul_is_equal (&demux->
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content_storage.essence_container_data_uids[j],
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&data->instance_uid)) {
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if (mxf_ul_is_equal (&demux->content_storage.
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essence_container_data_uids[j], &data->instance_uid)) {
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demux->content_storage.essence_container_data[j] = data;
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break;
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}
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@ -2160,11 +2170,32 @@ static GstFlowReturn
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gst_mxf_demux_handle_index_table_segment (GstMXFDemux * demux,
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const MXFUL * key, GstBuffer * buffer)
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{
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MXFIndexTableSegment segment;
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memset (&segment, 0, sizeof (segment));
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GST_DEBUG_OBJECT (demux,
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"Handling index table segment of size %u at offset %"
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G_GUINT64_FORMAT, GST_BUFFER_SIZE (buffer), demux->offset);
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/* TODO: Parse this */
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if (!demux->primer.valid) {
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GST_WARNING_OBJECT (demux, "Invalid primer pack");
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return GST_FLOW_OK;
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}
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if (!mxf_index_table_segment_parse (key, &segment, &demux->primer,
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GST_BUFFER_DATA (buffer), GST_BUFFER_SIZE (buffer))) {
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GST_ERROR_OBJECT (demux, "Parsing index table segment failed");
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return GST_FLOW_ERROR;
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}
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if (!demux->index_table)
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demux->index_table =
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g_array_new (FALSE, FALSE, sizeof (MXFIndexTableSegment));
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g_array_append_val (demux->index_table, segment);
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return GST_FLOW_OK;
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}
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@ -68,6 +68,7 @@ struct _GstMXFDemux
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MXFPrimerPack primer;
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GArray *partition_index;
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GArray *index_table;
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/* Structural metadata */
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gboolean update_metadata;
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@ -596,6 +596,246 @@ mxf_random_index_pack_parse (const MXFUL * key, const guint8 * data, guint size,
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return TRUE;
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}
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/* SMPTE 377M 10.2.3 */
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gboolean
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mxf_index_table_segment_parse (const MXFUL * key,
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MXFIndexTableSegment * segment, const MXFPrimerPack * primer,
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const guint8 * data, guint size)
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{
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gchar str[48];
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guint16 tag, tag_size;
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const guint8 *tag_data;
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g_return_val_if_fail (key != NULL, FALSE);
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g_return_val_if_fail (data != NULL, FALSE);
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g_return_val_if_fail (primer != NULL, FALSE);
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memset (segment, 0, sizeof (MXFIndexTableSegment));
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if (size < 70)
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return FALSE;
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GST_DEBUG ("Parsing index table segment:");
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while (mxf_local_tag_parse (data, size, &tag, &tag_size, &tag_data)) {
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if (tag_size == 0 || tag == 0x0000)
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goto next;
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switch (tag) {
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case 0x3c0a:
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if (tag_size != 16)
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goto error;
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memcpy (&segment->instance_id, tag_data, 16);
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GST_DEBUG (" instance id = %s",
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mxf_ul_to_string (&segment->instance_id, str));
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break;
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case 0x3f0b:
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if (!mxf_fraction_parse (&segment->index_edit_rate, tag_data, tag_size))
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goto error;
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GST_DEBUG (" index edit rate = %d/%d", segment->index_edit_rate.n,
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segment->index_edit_rate.d);
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break;
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case 0x3f0c:
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if (tag_size != 8)
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goto error;
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segment->index_start_position = GST_READ_UINT64_BE (tag_data);
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GST_DEBUG (" index start position = %" G_GINT64_FORMAT,
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segment->index_start_position);
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break;
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case 0x3f0d:
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if (tag_size != 8)
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goto error;
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segment->index_duration = GST_READ_UINT64_BE (tag_data);
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GST_DEBUG (" index duration = %" G_GINT64_FORMAT,
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segment->index_duration);
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break;
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case 0x3f05:
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if (tag_size != 4)
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goto error;
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segment->edit_unit_byte_count = GST_READ_UINT32_BE (tag_data);
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GST_DEBUG (" edit unit byte count = %u",
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segment->edit_unit_byte_count);
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break;
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case 0x3f06:
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if (tag_size != 4)
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goto error;
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segment->index_sid = GST_READ_UINT32_BE (tag_data);
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GST_DEBUG (" index sid = %u", segment->index_sid);
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break;
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case 0x3f07:
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if (tag_size != 4)
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goto error;
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segment->body_sid = GST_READ_UINT32_BE (tag_data);
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GST_DEBUG (" body sid = %u", segment->body_sid);
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break;
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case 0x3f08:
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if (tag_size != 1)
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goto error;
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segment->slice_count = GST_READ_UINT8 (tag_data);
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GST_DEBUG (" slice count = %u", segment->slice_count);
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break;
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case 0x3f0e:
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if (tag_size != 1)
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goto error;
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segment->pos_table_count = GST_READ_UINT8 (tag_data);
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GST_DEBUG (" pos table count = %u", segment->pos_table_count);
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break;
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case 0x3f09:{
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guint len, i;
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if (tag_size < 8)
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goto error;
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len = GST_READ_UINT32_BE (tag_data);
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segment->n_delta_entries = len;
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GST_DEBUG (" number of delta entries = %u", segment->n_delta_entries);
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if (len == 0)
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goto next;
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tag_data += 4;
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tag_size -= 4;
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if (GST_READ_UINT32_BE (tag_data) != 6)
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goto error;
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tag_data += 4;
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tag_size -= 4;
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if (tag_size < len * 6)
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goto error;
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segment->delta_entries = g_new (MXFDeltaEntry, len);
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for (i = 0; i < len; i++) {
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GST_DEBUG (" delta entry %u:", i);
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segment->delta_entries[i].pos_table_index = GST_READ_UINT8 (tag_data);
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tag_data += 1;
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tag_size -= 1;
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GST_DEBUG (" pos table index = %d",
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segment->delta_entries[i].pos_table_index);
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segment->delta_entries[i].slice = GST_READ_UINT8 (tag_data);
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tag_data += 1;
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tag_size -= 1;
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GST_DEBUG (" slice = %u", segment->delta_entries[i].slice);
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segment->delta_entries[i].element_delta =
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GST_READ_UINT32_BE (tag_data);
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tag_data += 4;
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tag_size -= 4;
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GST_DEBUG (" element delta = %u",
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segment->delta_entries[i].element_delta);
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}
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break;
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}
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case 0x3f0a:{
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guint len, i, j;
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if (tag_size < 8)
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goto error;
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len = GST_READ_UINT32_BE (tag_data);
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segment->n_index_entries = len;
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GST_DEBUG (" number of index entries = %u", segment->n_index_entries);
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if (len == 0)
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goto next;
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tag_data += 4;
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tag_size -= 4;
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if (GST_READ_UINT32_BE (tag_data) !=
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(11 + 4 * segment->slice_count + 8 * segment->pos_table_count))
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goto error;
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tag_data += 4;
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tag_size -= 4;
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if (tag_size <
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len * (11 + 4 * segment->slice_count +
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8 * segment->pos_table_count))
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goto error;
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segment->index_entries = g_new (MXFIndexEntry, len);
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for (i = 0; i < len; i++) {
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MXFIndexEntry *entry = &segment->index_entries[i];
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GST_DEBUG (" index entry %u:", i);
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entry->temporal_offset = GST_READ_UINT8 (tag_data);
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tag_data += 1;
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tag_size -= 1;
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GST_DEBUG (" temporal offset = %d", entry->temporal_offset);
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entry->key_frame_offset = GST_READ_UINT8 (tag_data);
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tag_data += 1;
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tag_size -= 1;
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GST_DEBUG (" keyframe offset = %d", entry->key_frame_offset);
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entry->flags = GST_READ_UINT8 (tag_data);
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tag_data += 1;
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tag_size -= 1;
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GST_DEBUG (" flags = 0x%02x", entry->flags);
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entry->stream_offset = GST_READ_UINT64_BE (tag_data);
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tag_data += 8;
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tag_size -= 8;
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GST_DEBUG (" stream offset = %" G_GUINT64_FORMAT,
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entry->stream_offset);
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for (j = 0; j < segment->slice_count; j++) {
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entry->slice_offset[j] = GST_READ_UINT32_BE (tag_data);
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tag_data += 4;
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tag_size -= 4;
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GST_DEBUG (" slice %u offset = %u", j, entry->slice_offset[j]);
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}
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for (j = 0; j < segment->pos_table_count; j++) {
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mxf_fraction_parse (&entry->pos_table[j], tag_data, tag_size);
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tag_data += 8;
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tag_size -= 8;
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GST_DEBUG (" pos table %u = %d/%d", j, entry->pos_table[j].n,
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entry->pos_table[j].d);
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}
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}
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break;
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}
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default:
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if (!gst_metadata_add_custom_tag (primer, tag, tag_data, tag_size,
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&segment->other_tags))
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goto error;
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break;
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}
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next:
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data += 4 + tag_size;
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size -= 4 + tag_size;
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}
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return TRUE;
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error:
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GST_ERROR ("Invalid index table segment");
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return FALSE;
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}
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void
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mxf_index_table_segment_reset (MXFIndexTableSegment * segment)
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{
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guint i;
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g_return_if_fail (segment != NULL);
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for (i = 0; i < segment->n_index_entries; i++) {
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g_free (segment->index_entries[i].slice_offset);
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g_free (segment->index_entries[i].pos_table);
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}
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g_free (segment->index_entries);
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g_free (segment->delta_entries);
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if (segment->other_tags)
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g_hash_table_destroy (segment->other_tags);
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memset (segment, 0, sizeof (MXFIndexTableSegment));
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}
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/* SMPTE 377M 8.2 Table 1 and 2 */
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static void
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@ -79,6 +79,9 @@ void mxf_primer_pack_reset (MXFPrimerPack *pack);
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gboolean mxf_random_index_pack_parse (const MXFUL *key, const guint8 *data, guint size, GArray **array);
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gboolean mxf_index_table_segment_parse (const MXFUL *key, MXFIndexTableSegment *segment, const MXFPrimerPack *primer, const guint8 *data, guint size);
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void mxf_index_table_segment_reset (MXFIndexTableSegment *segment);
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gboolean mxf_local_tag_parse (const guint8 * data, guint size, guint16 * tag,
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guint16 * tag_size, const guint8 ** tag_data);
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void gst_mxf_local_tag_free (MXFLocalTag *tag);
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@ -115,6 +115,44 @@ typedef struct {
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GHashTable *mappings;
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} MXFPrimerPack;
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/* SMPTE 377M 10.2.3 */
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typedef struct {
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gint8 pos_table_index;
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guint8 slice;
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guint32 element_delta;
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} MXFDeltaEntry;
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typedef struct {
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gint8 temporal_offset;
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gint8 key_frame_offset;
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guint8 flags;
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guint64 stream_offset;
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guint32 *slice_offset;
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MXFFraction *pos_table;
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} MXFIndexEntry;
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typedef struct {
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MXFUL instance_id;
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MXFFraction index_edit_rate;
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gint64 index_start_position;
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gint64 index_duration;
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guint32 edit_unit_byte_count;
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guint32 index_sid;
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guint32 body_sid;
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guint8 slice_count;
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guint8 pos_table_count;
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guint32 n_delta_entries;
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MXFDeltaEntry *delta_entries;
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guint32 n_index_entries;
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MXFIndexEntry *index_entries;
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GHashTable *other_tags;
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} MXFIndexTableSegment;
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/* SMPTE 377M 8.6 table 14 */
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#define MXF_METADATA_PREFACE (0x012f)
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#define MXF_METADATA_IDENTIFICATION (0x0130)
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