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gstreamer/gst/mxf/mxfparse.c
Sebastian Dröge 716ce72e46 Store MXF metadata in a hash table, keyed by UID 
Store the MXF metadata in a hash table, keyed by the
instance UID. This simplifies resolval of the metadata
and makes looping over all metadata sets unnecessary
in most cases.

Additionally parse metadata always. If we already have
a metadata set with the same UID replace it only if
the new metadata set is from a later offset. This
fixes metadata parsing of files where following partitions
don't have a complete copy of the previous metadata.
2009-01-22 13:13:00 +01:00

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/* GStreamer
* Copyright (C) 2008-2009 Sebastian Dröge <sebastian.droege@collabora.co.uk>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <gst/gst.h>
#include <string.h>
#include "mxfparse.h"
GST_DEBUG_CATEGORY_EXTERN (mxf_debug);
#define GST_CAT_DEFAULT mxf_debug
/* SMPTE 377M 3.3: A value of 0 for every field means unknown timestamp */
static const MXFTimestamp mxf_timestamp_unknown = { 0, 0, 0, 0, 0, 0, 0 };
static const MXFUMID umid_zero = { {0,} };
static const MXFUL key_zero = { {0,} };
/* UL common to all MXF UL */
static const guint8 mxf_key[] = { 0x06, 0x0e, 0x2b, 0x34 };
/* SMPTE 377M 6.1 */
static const guint8 partition_pack_key[] =
{ 0x06, 0x0e, 0x2b, 0x34, 0x02, 0x05, 0x01, 0x01, 0x0d, 0x01, 0x02, 0x01,
0x01
};
/* SMPTE 336M */
static const guint8 fill_key[] =
{ 0x06, 0x0e, 0x2b, 0x34, 0x01, 0x01, 0x01, 0x01, 0x03, 0x01, 0x02, 0x10,
0x01, 0x00, 0x00, 0x00
};
/* SMPTE 377M 8.1 */
static const guint8 primer_pack_key[] =
{ 0x06, 0x0e, 0x2b, 0x34, 0x02, 0x05, 0x01, 0x01, 0x0d, 0x01, 0x02, 0x01,
0x01, 0x05, 0x01, 0x00
};
/* SMPTE 377M 8.6 */
static const guint8 metadata_key[] =
{ 0x06, 0x0e, 0x2b, 0x34, 0x02, 0x53, 0x01, 0x01, 0x0d, 0x01, 0x01, 0x01,
0x01
};
static const guint8 random_index_pack_key[] =
{ 0x06, 0x0e, 0x2b, 0x34, 0x02, 0x05, 0x01, 0x01, 0x0d, 0x01, 0x02, 0x01,
0x01, 0x11, 0x01, 0x00
};
static const guint8 index_table_segment_key[] =
{ 0x06, 0x0e, 0x2b, 0x34, 0x02, 0x53, 0x01, 0x01, 0x0d, 0x01, 0x02, 0x01,
0x01, 0x10, 0x01, 0x00
};
gboolean
mxf_is_mxf_packet (const MXFUL * key)
{
return (memcmp (key, mxf_key, 4) == 0);
}
/* SMPTE 377M 6.1: Check if this is a valid partition pack */
gboolean
mxf_is_partition_pack (const MXFUL * key)
{
if (memcmp (key, partition_pack_key, 13) == 0 && key->u[13] >= 0x02
&& key->u[13] <= 0x04 && key->u[14] < 0x05 && key->u[15] == 0x00)
return TRUE;
return FALSE;
}
/* SMPTE 377M 6.2: header partition pack has byte 14 == 0x02 */
gboolean
mxf_is_header_partition_pack (const MXFUL * key)
{
if (memcmp (key, partition_pack_key, 13) == 0 && key->u[13] == 0x02 &&
key->u[14] < 0x05 && key->u[15] == 0x00)
return TRUE;
return FALSE;
}
/* SMPTE 377M 6.3: body partition pack has byte 14 == 0x03 */
gboolean
mxf_is_body_partition_pack (const MXFUL * key)
{
if (memcmp (key, partition_pack_key, 13) == 0 && key->u[13] == 0x03 &&
key->u[14] < 0x05 && key->u[15] == 0x00)
return TRUE;
return FALSE;
}
/* SMPTE 377M 6.4: footer partition pack has byte 14 == 0x04 */
gboolean
mxf_is_footer_partition_pack (const MXFUL * key)
{
if (memcmp (key, partition_pack_key, 13) == 0 && key->u[13] == 0x04 &&
key->u[14] < 0x05 && key->u[15] == 0x00)
return TRUE;
return FALSE;
}
gboolean
mxf_is_fill (const MXFUL * key)
{
return (memcmp (key, fill_key, 16) == 0);
}
gboolean
mxf_is_primer_pack (const MXFUL * key)
{
return (memcmp (key, primer_pack_key, 16) == 0);
}
gboolean
mxf_is_metadata (const MXFUL * key)
{
return (memcmp (key, metadata_key, 13) == 0 && key->u[15] == 0x00);
}
/* SMPTE 377M 8.7.3 */
gboolean
mxf_is_descriptive_metadata (const MXFUL * key)
{
return (memcmp (key, mxf_key, 4) == 0 &&
key->u[4] == 0x02 &&
key->u[6] == 0x01 &&
key->u[7] == 0x01 &&
key->u[8] == 0x0d &&
key->u[9] == 0x01 && key->u[10] == 0x04 && key->u[11] == 0x01);
}
gboolean
mxf_is_random_index_pack (const MXFUL * key)
{
return (memcmp (key, random_index_pack_key, 16) == 0);
}
gboolean
mxf_is_index_table_segment (const MXFUL * key)
{
return (memcmp (key, index_table_segment_key, 16) == 0);
}
/* SMPTE 379M 6.2.1 */
gboolean
mxf_is_generic_container_system_item (const MXFUL * key)
{
return (memcmp (key, mxf_key, 4) == 0 && key->u[4] == 0x02
&& key->u[6] == 0x01 && key->u[8] == 0x0d && key->u[9] == 0x01
&& key->u[10] == 0x03 && key->u[11] == 0x01 && (key->u[12] == 0x04
|| key->u[12] == 0x14));
}
/* SMPTE 379M 7.1 */
gboolean
mxf_is_generic_container_essence_element (const MXFUL * key)
{
return (memcmp (key, mxf_key, 4) == 0 && key->u[4] == 0x01
&& key->u[5] == 0x02 && key->u[6] == 0x01 && key->u[8] == 0x0d
&& key->u[9] == 0x01 && key->u[10] == 0x03 && key->u[11] == 0x01
&& (key->u[12] == 0x05 || key->u[12] == 0x06 || key->u[12] == 0x07
|| key->u[12] == 0x15 || key->u[12] == 0x16 || key->u[12] == 0x17
|| key->u[12] == 0x18));
}
/* SMPTE 379M 8 */
gboolean
mxf_is_generic_container_essence_container_label (const MXFUL * key)
{
return (key->u[0] == 0x06 &&
key->u[1] == 0x0e &&
key->u[2] == 0x2b &&
key->u[3] == 0x34 &&
key->u[4] == 0x04 &&
key->u[5] == 0x01 &&
key->u[6] == 0x01 &&
key->u[8] == 0x0d &&
key->u[9] == 0x01 &&
key->u[10] == 0x03 &&
key->u[11] == 0x01 && (key->u[12] == 0x01 || key->u[12] == 0x02));
}
gboolean
mxf_ul_is_equal (const MXFUL * a, const MXFUL * b)
{
return (memcmp (a, b, 16) == 0);
}
gboolean
mxf_ul_is_zero (const MXFUL * key)
{
return (memcmp (key, &key_zero, 16) == 0);
}
guint
mxf_ul_hash (const MXFUL * key)
{
guint32 ret = 0;
guint i;
for (i = 0; i < 4; i++)
ret ^=
(key->u[i * 4 + 0] << 24) | (key->u[i * 4 + 1] << 16) | (key->u[i * 4 +
2] << 8) | (key->u[i * 4 + 3] << 0);
return ret;
}
gchar *
mxf_ul_to_string (const MXFUL * key, gchar str[48])
{
g_return_val_if_fail (key != NULL, NULL);
g_return_val_if_fail (str != NULL, NULL);
g_snprintf (str, 48,
"%02x.%02x.%02x.%02x.%02x.%02x.%02x.%02x.%02x.%02x.%02x.%02x.%02x.%02x.%02x.%02x",
key->u[0], key->u[1], key->u[2], key->u[3], key->u[4], key->u[5],
key->u[6], key->u[7], key->u[8], key->u[9], key->u[10], key->u[11],
key->u[12], key->u[13], key->u[14], key->u[15]);
return str;
}
gboolean
mxf_umid_is_equal (const MXFUMID * a, const MXFUMID * b)
{
return (memcmp (a, b, 32) == 0);
}
gboolean
mxf_umid_is_zero (const MXFUMID * umid)
{
return (memcmp (umid, &umid_zero, 32) == 0);
}
gchar *
mxf_umid_to_string (const MXFUMID * key, gchar str[96])
{
g_return_val_if_fail (key != NULL, NULL);
g_return_val_if_fail (str != NULL, NULL);
g_snprintf (str, 96,
"%02x.%02x.%02x.%02x.%02x.%02x.%02x.%02x.%02x.%02x.%02x.%02x.%02x.%02x.%02x.%02x."
"%02x.%02x.%02x.%02x.%02x.%02x.%02x.%02x.%02x.%02x.%02x.%02x.%02x.%02x.%02x.%02x",
key->u[0], key->u[1], key->u[2], key->u[3], key->u[4], key->u[5],
key->u[6], key->u[7], key->u[8], key->u[9], key->u[10], key->u[11],
key->u[12], key->u[13], key->u[14], key->u[15],
key->u[16],
key->u[17],
key->u[18],
key->u[19],
key->u[20],
key->u[21],
key->u[22],
key->u[23],
key->u[24],
key->u[25],
key->u[26], key->u[27], key->u[28], key->u[29], key->u[30], key->u[31]
);
return str;
}
MXFUMID *
mxf_umid_from_string (const gchar * str, MXFUMID * umid)
{
gint len;
guint i, j;
g_return_val_if_fail (str != NULL, NULL);
len = strlen (str);
memset (umid, 0, 32);
if (len != 95) {
GST_ERROR ("Invalid UMID string length %d", len);
return NULL;
}
for (i = 0, j = 0; i < 32; i++) {
if (!g_ascii_isxdigit (str[j]) ||
!g_ascii_isxdigit (str[j + 1]) ||
(str[j + 2] != '.' && str[j + 2] != '\0')) {
GST_ERROR ("Invalid UMID string '%s'", str);
return NULL;
}
umid->u[i] =
(g_ascii_xdigit_value (str[j]) << 4) | (g_ascii_xdigit_value (str[j +
1]));
j += 3;
}
return umid;
}
gboolean
mxf_timestamp_parse (MXFTimestamp * timestamp, const guint8 * data, guint size)
{
g_return_val_if_fail (data != NULL, FALSE);
g_return_val_if_fail (timestamp != NULL, FALSE);
memset (timestamp, 0, sizeof (MXFTimestamp));
if (size < 8)
return FALSE;
timestamp->year = GST_READ_UINT16_BE (data);
timestamp->month = GST_READ_UINT8 (data + 2);
timestamp->day = GST_READ_UINT8 (data + 3);
timestamp->hour = GST_READ_UINT8 (data + 4);
timestamp->minute = GST_READ_UINT8 (data + 5);
timestamp->second = GST_READ_UINT8 (data + 6);
timestamp->quarter_msecond = GST_READ_UINT8 (data + 7);
return TRUE;
}
gboolean
mxf_timestamp_is_unknown (const MXFTimestamp * a)
{
return (memcmp (a, &mxf_timestamp_unknown, sizeof (MXFTimestamp)) == 0);
}
gint
mxf_timestamp_compare (const MXFTimestamp * a, const MXFTimestamp * b)
{
gint diff;
if ((diff = a->year - b->year) != 0)
return diff;
else if ((diff = a->month - b->month) != 0)
return diff;
else if ((diff = a->day - b->day) != 0)
return diff;
else if ((diff = a->hour - b->hour) != 0)
return diff;
else if ((diff = a->minute - b->minute) != 0)
return diff;
else if ((diff = a->second - b->second) != 0)
return diff;
else if ((diff = a->quarter_msecond - b->quarter_msecond) != 0)
return diff;
else
return 0;
}
gboolean
mxf_fraction_parse (MXFFraction * fraction, const guint8 * data, guint size)
{
g_return_val_if_fail (fraction != NULL, FALSE);
g_return_val_if_fail (data != NULL, FALSE);
memset (fraction, 0, sizeof (MXFFraction));
if (size < 8)
return FALSE;
fraction->n = GST_READ_UINT32_BE (data);
fraction->d = GST_READ_UINT32_BE (data + 4);
return TRUE;
}
gchar *
mxf_utf16_to_utf8 (const guint8 * data, guint size)
{
gchar *ret;
GError *error = NULL;
ret =
g_convert ((const gchar *) data, size, "UTF-8", "UTF-16BE", NULL, NULL,
&error);
if (ret == NULL) {
GST_WARNING ("UTF-16-BE to UTF-8 conversion failed: %s", error->message);
g_error_free (error);
return NULL;
}
return ret;
}
gboolean
mxf_product_version_parse (MXFProductVersion * product_version,
const guint8 * data, guint size)
{
g_return_val_if_fail (product_version != NULL, FALSE);
g_return_val_if_fail (data != NULL, FALSE);
memset (product_version, 0, sizeof (MXFProductVersion));
if (size < 9)
return FALSE;
product_version->major = GST_READ_UINT16_BE (data);
product_version->minor = GST_READ_UINT16_BE (data + 2);
product_version->patch = GST_READ_UINT16_BE (data + 4);
product_version->build = GST_READ_UINT16_BE (data + 6);
/* Avid writes a 9 byte product version */
if (size == 9)
product_version->release = GST_READ_UINT8 (data + 8);
else
product_version->release = GST_READ_UINT16_BE (data + 8);
return TRUE;
}
gboolean
mxf_ul_array_parse (MXFUL ** array, guint32 * count, const guint8 * data,
guint size)
{
guint32 element_count, element_size;
guint i;
g_return_val_if_fail (array != NULL, FALSE);
g_return_val_if_fail (count != NULL, FALSE);
g_return_val_if_fail (data != NULL, FALSE);
if (size < 8)
return FALSE;
element_count = GST_READ_UINT32_BE (data);
data += 4;
size -= 4;
if (element_count == 0) {
*array = NULL;
*count = 0;
return TRUE;
}
element_size = GST_READ_UINT32_BE (data);
data += 4;
size -= 4;
if (element_size != 16) {
*array = NULL;
*count = 0;
return FALSE;
}
if (16 * element_count < size) {
*array = NULL;
*count = 0;
return FALSE;
}
*array = g_new (MXFUL, element_count);
*count = element_count;
for (i = 0; i < element_count; i++) {
memcpy (&((*array)[i]), data, 16);
data += 16;
}
return TRUE;
}
/* SMPTE 377M 6.1, Table 2 */
gboolean
mxf_partition_pack_parse (const MXFUL * key, MXFPartitionPack * pack,
const guint8 * data, guint size)
{
#ifndef GST_DISABLE_GST_DEBUG
guint i;
gchar str[48];
#endif
g_return_val_if_fail (data != NULL, FALSE);
g_return_val_if_fail (size >= 84, FALSE);
memset (pack, 0, sizeof (MXFPartitionPack));
GST_DEBUG ("Parsing partition pack:");
if (key->u[13] == 0x02)
pack->type = MXF_PARTITION_PACK_HEADER;
else if (key->u[13] == 0x03)
pack->type = MXF_PARTITION_PACK_BODY;
else if (key->u[13] == 0x04)
pack->type = MXF_PARTITION_PACK_FOOTER;
GST_DEBUG (" type = %s",
(pack->type == MXF_PARTITION_PACK_HEADER) ? "header" : (pack->type ==
MXF_PARTITION_PACK_BODY) ? "body" : "footer");
pack->closed = (key->u[14] == 0x02 || key->u[14] == 0x04);
pack->complete = (key->u[14] == 0x03 || key->u[14] == 0x04);
GST_DEBUG (" closed = %s, complete = %s", (pack->closed) ? "yes" : "no",
(pack->complete) ? "yes" : "no");
pack->major_version = GST_READ_UINT16_BE (data);
if (pack->major_version != 1)
goto error;
data += 2;
size -= 2;
pack->minor_version = GST_READ_UINT16_BE (data);
data += 2;
size -= 2;
GST_DEBUG (" MXF version = %u.%u", pack->major_version, pack->minor_version);
pack->kag_size = GST_READ_UINT32_BE (data);
data += 4;
size -= 4;
GST_DEBUG (" KAG size = %u", pack->kag_size);
pack->this_partition = GST_READ_UINT64_BE (data);
data += 8;
size -= 8;
GST_DEBUG (" this partition offset = %" G_GUINT64_FORMAT,
pack->this_partition);
pack->prev_partition = GST_READ_UINT64_BE (data);
data += 8;
size -= 8;
GST_DEBUG (" previous partition offset = %" G_GUINT64_FORMAT,
pack->prev_partition);
pack->footer_partition = GST_READ_UINT64_BE (data);
data += 8;
size -= 8;
GST_DEBUG (" footer partition offset = %" G_GUINT64_FORMAT,
pack->footer_partition);
pack->header_byte_count = GST_READ_UINT64_BE (data);
data += 8;
size -= 8;
GST_DEBUG (" header byte count = %" G_GUINT64_FORMAT,
pack->header_byte_count);
pack->index_byte_count = GST_READ_UINT64_BE (data);
data += 8;
size -= 8;
pack->index_sid = GST_READ_UINT32_BE (data);
data += 4;
size -= 4;
GST_DEBUG (" index sid = %u, size = %" G_GUINT64_FORMAT, pack->index_sid,
pack->index_byte_count);
pack->body_offset = GST_READ_UINT64_BE (data);
data += 8;
size -= 8;
pack->body_sid = GST_READ_UINT32_BE (data);
data += 4;
size -= 4;
GST_DEBUG (" body sid = %u, offset = %" G_GUINT64_FORMAT, pack->body_sid,
pack->body_offset);
memcpy (&pack->operational_pattern, data, 16);
data += 16;
size -= 16;
GST_DEBUG (" operational pattern = %s",
mxf_ul_to_string (&pack->operational_pattern, str));
if (!mxf_ul_array_parse (&pack->essence_containers,
&pack->n_essence_containers, data, size))
goto error;
#ifndef GST_DISABLE_GST_DEBUG
GST_DEBUG (" number of essence containers = %u", pack->n_essence_containers);
if (pack->n_essence_containers) {
for (i = 0; i < pack->n_essence_containers; i++) {
GST_DEBUG (" essence container %u = %s", i,
mxf_ul_to_string (&pack->essence_containers[i], str));
}
}
#endif
pack->valid = TRUE;
return TRUE;
error:
GST_ERROR ("Invalid partition pack");
mxf_partition_pack_reset (pack);
return FALSE;
}
void
mxf_partition_pack_reset (MXFPartitionPack * pack)
{
g_return_if_fail (pack != NULL);
g_free (pack->essence_containers);
memset (pack, 0, sizeof (MXFPartitionPack));
}
/* SMPTE 377M 11.1 */
gboolean
mxf_random_index_pack_parse (const MXFUL * key, const guint8 * data, guint size,
GArray ** array)
{
guint len, i;
MXFRandomIndexPackEntry entry;
g_return_val_if_fail (data != NULL, FALSE);
g_return_val_if_fail (array != NULL, FALSE);
if (size < 4)
return FALSE;
if ((size - 4) % 12 != 0)
return FALSE;
GST_DEBUG ("Parsing random index pack:");
len = (size - 4) / 12;
GST_DEBUG (" number of entries = %u", len);
*array =
g_array_sized_new (FALSE, FALSE, sizeof (MXFRandomIndexPackEntry), len);
for (i = 0; i < len; i++) {
entry.body_sid = GST_READ_UINT32_BE (data);
entry.offset = GST_READ_UINT64_BE (data + 4);
data += 12;
GST_DEBUG (" entry %u = body sid %u at offset %" G_GUINT64_FORMAT, i,
entry.body_sid, entry.offset);
g_array_append_val (*array, entry);
}
return TRUE;
}
/* SMPTE 377M 10.2.3 */
gboolean
mxf_index_table_segment_parse (const MXFUL * key,
MXFIndexTableSegment * segment, const MXFPrimerPack * primer,
const guint8 * data, guint size)
{
#ifndef GST_DISABLE_GST_DEBUG
gchar str[48];
#endif
guint16 tag, tag_size;
const guint8 *tag_data;
g_return_val_if_fail (key != NULL, FALSE);
g_return_val_if_fail (data != NULL, FALSE);
g_return_val_if_fail (primer != NULL, FALSE);
memset (segment, 0, sizeof (MXFIndexTableSegment));
if (size < 70)
return FALSE;
GST_DEBUG ("Parsing index table segment:");
while (mxf_local_tag_parse (data, size, &tag, &tag_size, &tag_data)) {
if (tag_size == 0 || tag == 0x0000)
goto next;
switch (tag) {
case 0x3c0a:
if (tag_size != 16)
goto error;
memcpy (&segment->instance_id, tag_data, 16);
GST_DEBUG (" instance id = %s",
mxf_ul_to_string (&segment->instance_id, str));
break;
case 0x3f0b:
if (!mxf_fraction_parse (&segment->index_edit_rate, tag_data, tag_size))
goto error;
GST_DEBUG (" index edit rate = %d/%d", segment->index_edit_rate.n,
segment->index_edit_rate.d);
break;
case 0x3f0c:
if (tag_size != 8)
goto error;
segment->index_start_position = GST_READ_UINT64_BE (tag_data);
GST_DEBUG (" index start position = %" G_GINT64_FORMAT,
segment->index_start_position);
break;
case 0x3f0d:
if (tag_size != 8)
goto error;
segment->index_duration = GST_READ_UINT64_BE (tag_data);
GST_DEBUG (" index duration = %" G_GINT64_FORMAT,
segment->index_duration);
break;
case 0x3f05:
if (tag_size != 4)
goto error;
segment->edit_unit_byte_count = GST_READ_UINT32_BE (tag_data);
GST_DEBUG (" edit unit byte count = %u",
segment->edit_unit_byte_count);
break;
case 0x3f06:
if (tag_size != 4)
goto error;
segment->index_sid = GST_READ_UINT32_BE (tag_data);
GST_DEBUG (" index sid = %u", segment->index_sid);
break;
case 0x3f07:
if (tag_size != 4)
goto error;
segment->body_sid = GST_READ_UINT32_BE (tag_data);
GST_DEBUG (" body sid = %u", segment->body_sid);
break;
case 0x3f08:
if (tag_size != 1)
goto error;
segment->slice_count = GST_READ_UINT8 (tag_data);
GST_DEBUG (" slice count = %u", segment->slice_count);
break;
case 0x3f0e:
if (tag_size != 1)
goto error;
segment->pos_table_count = GST_READ_UINT8 (tag_data);
GST_DEBUG (" pos table count = %u", segment->pos_table_count);
break;
case 0x3f09:{
guint len, i;
if (tag_size < 8)
goto error;
len = GST_READ_UINT32_BE (tag_data);
segment->n_delta_entries = len;
GST_DEBUG (" number of delta entries = %u", segment->n_delta_entries);
if (len == 0)
goto next;
tag_data += 4;
tag_size -= 4;
if (GST_READ_UINT32_BE (tag_data) != 6)
goto error;
tag_data += 4;
tag_size -= 4;
if (tag_size < len * 6)
goto error;
segment->delta_entries = g_new (MXFDeltaEntry, len);
for (i = 0; i < len; i++) {
GST_DEBUG (" delta entry %u:", i);
segment->delta_entries[i].pos_table_index = GST_READ_UINT8 (tag_data);
tag_data += 1;
tag_size -= 1;
GST_DEBUG (" pos table index = %d",
segment->delta_entries[i].pos_table_index);
segment->delta_entries[i].slice = GST_READ_UINT8 (tag_data);
tag_data += 1;
tag_size -= 1;
GST_DEBUG (" slice = %u", segment->delta_entries[i].slice);
segment->delta_entries[i].element_delta =
GST_READ_UINT32_BE (tag_data);
tag_data += 4;
tag_size -= 4;
GST_DEBUG (" element delta = %u",
segment->delta_entries[i].element_delta);
}
break;
}
case 0x3f0a:{
guint len, i, j;
if (tag_size < 8)
goto error;
len = GST_READ_UINT32_BE (tag_data);
segment->n_index_entries = len;
GST_DEBUG (" number of index entries = %u", segment->n_index_entries);
if (len == 0)
goto next;
tag_data += 4;
tag_size -= 4;
if (GST_READ_UINT32_BE (tag_data) !=
(11 + 4 * segment->slice_count + 8 * segment->pos_table_count))
goto error;
tag_data += 4;
tag_size -= 4;
if (tag_size <
len * (11 + 4 * segment->slice_count +
8 * segment->pos_table_count))
goto error;
segment->index_entries = g_new (MXFIndexEntry, len);
for (i = 0; i < len; i++) {
MXFIndexEntry *entry = &segment->index_entries[i];
GST_DEBUG (" index entry %u:", i);
entry->temporal_offset = GST_READ_UINT8 (tag_data);
tag_data += 1;
tag_size -= 1;
GST_DEBUG (" temporal offset = %d", entry->temporal_offset);
entry->key_frame_offset = GST_READ_UINT8 (tag_data);
tag_data += 1;
tag_size -= 1;
GST_DEBUG (" keyframe offset = %d", entry->key_frame_offset);
entry->flags = GST_READ_UINT8 (tag_data);
tag_data += 1;
tag_size -= 1;
GST_DEBUG (" flags = 0x%02x", entry->flags);
entry->stream_offset = GST_READ_UINT64_BE (tag_data);
tag_data += 8;
tag_size -= 8;
GST_DEBUG (" stream offset = %" G_GUINT64_FORMAT,
entry->stream_offset);
for (j = 0; j < segment->slice_count; j++) {
entry->slice_offset[j] = GST_READ_UINT32_BE (tag_data);
tag_data += 4;
tag_size -= 4;
GST_DEBUG (" slice %u offset = %u", j, entry->slice_offset[j]);
}
for (j = 0; j < segment->pos_table_count; j++) {
mxf_fraction_parse (&entry->pos_table[j], tag_data, tag_size);
tag_data += 8;
tag_size -= 8;
GST_DEBUG (" pos table %u = %d/%d", j, entry->pos_table[j].n,
entry->pos_table[j].d);
}
}
break;
}
default:
if (!mxf_local_tag_add_to_hash_table (primer, tag, tag_data, tag_size,
&segment->other_tags))
goto error;
break;
}
next:
data += 4 + tag_size;
size -= 4 + tag_size;
}
return TRUE;
error:
GST_ERROR ("Invalid index table segment");
return FALSE;
}
void
mxf_index_table_segment_reset (MXFIndexTableSegment * segment)
{
guint i;
g_return_if_fail (segment != NULL);
for (i = 0; i < segment->n_index_entries; i++) {
g_free (segment->index_entries[i].slice_offset);
g_free (segment->index_entries[i].pos_table);
}
g_free (segment->index_entries);
g_free (segment->delta_entries);
if (segment->other_tags)
g_hash_table_destroy (segment->other_tags);
memset (segment, 0, sizeof (MXFIndexTableSegment));
}
/* SMPTE 377M 8.2 Table 1 and 2 */
static void
_mxf_mapping_ul_free (MXFUL * ul)
{
g_slice_free (MXFUL, ul);
}
gboolean
mxf_primer_pack_parse (const MXFUL * key, MXFPrimerPack * pack,
const guint8 * data, guint size)
{
guint i;
guint32 n;
g_return_val_if_fail (data != NULL, FALSE);
g_return_val_if_fail (size >= 8, FALSE);
memset (pack, 0, sizeof (MXFPrimerPack));
GST_DEBUG ("Parsing primer pack:");
pack->mappings =
g_hash_table_new_full (g_direct_hash, g_direct_equal,
(GDestroyNotify) NULL, (GDestroyNotify) _mxf_mapping_ul_free);
n = GST_READ_UINT32_BE (data);
data += 4;
GST_DEBUG (" number of mappings = %u", n);
if (GST_READ_UINT32_BE (data) != 18)
goto error;
data += 4;
if (size < 8 + n * 18)
goto error;
for (i = 0; i < n; i++) {
guint local_tag;
#ifndef GST_DISABLE_GST_DEBUG
gchar str[48];
#endif
MXFUL *uid;
local_tag = GST_READ_UINT16_BE (data);
data += 2;
if (g_hash_table_lookup (pack->mappings, GUINT_TO_POINTER (local_tag)))
continue;
uid = g_slice_new (MXFUL);
memcpy (uid, data, 16);
data += 16;
g_hash_table_insert (pack->mappings, GUINT_TO_POINTER (local_tag), uid);
GST_DEBUG (" Adding mapping = 0x%04x -> %s", local_tag,
mxf_ul_to_string (uid, str));
}
pack->valid = TRUE;
return TRUE;
error:
GST_DEBUG ("Invalid primer pack");
mxf_primer_pack_reset (pack);
return FALSE;
}
void
mxf_primer_pack_reset (MXFPrimerPack * pack)
{
g_return_if_fail (pack != NULL);
if (pack->mappings)
g_hash_table_destroy (pack->mappings);
memset (pack, 0, sizeof (MXFPrimerPack));
}
/* structural metadata parsing */
gboolean
mxf_local_tag_parse (const guint8 * data, guint size, guint16 * tag,
guint16 * tag_size, const guint8 ** tag_data)
{
g_return_val_if_fail (data != NULL, FALSE);
if (size < 4)
return FALSE;
*tag = GST_READ_UINT16_BE (data);
*tag_size = GST_READ_UINT16_BE (data + 2);
if (size < 4 + *tag_size)
return FALSE;
*tag_data = data + 4;
return TRUE;
}
void
mxf_local_tag_free (MXFLocalTag * tag)
{
g_free (tag->data);
g_slice_free (MXFLocalTag, tag);
}
gboolean
mxf_local_tag_add_to_hash_table (const MXFPrimerPack * primer,
guint16 tag, const guint8 * tag_data, guint16 tag_size,
GHashTable ** hash_table)
{
MXFLocalTag *local_tag;
MXFUL *key;
g_return_val_if_fail (primer != NULL, FALSE);
g_return_val_if_fail (tag_data != NULL, FALSE);
g_return_val_if_fail (hash_table != NULL, FALSE);
g_return_val_if_fail (primer->mappings != NULL, FALSE);
if (*hash_table == NULL)
*hash_table =
g_hash_table_new_full ((GHashFunc) mxf_ul_hash,
(GEqualFunc) mxf_ul_is_equal, (GDestroyNotify) NULL,
(GDestroyNotify) mxf_local_tag_free);
g_return_val_if_fail (*hash_table != NULL, FALSE);
key = (MXFUL *) g_hash_table_lookup (primer->mappings,
GUINT_TO_POINTER (((guint) tag)));
if (key) {
#ifndef GST_DISABLE_GST_DEBUG
gchar str[48];
#endif
GST_DEBUG ("Adding local tag 0x%04x with UL %s and size %u", tag,
mxf_ul_to_string (key, str), tag_size);
local_tag = g_slice_new (MXFLocalTag);
memcpy (&local_tag->key, key, sizeof (MXFUL));
local_tag->size = tag_size;
local_tag->data = g_memdup (tag_data, tag_size);
g_hash_table_insert (*hash_table, &local_tag->key, local_tag);
} else {
GST_WARNING ("Local tag with no entry in primer pack: 0x%04x", tag);
}
return TRUE;
}
static GSList *_mxf_essence_element_handler_registry = NULL;
void
mxf_essence_element_handler_register (const MXFEssenceElementHandler * handler)
{
_mxf_essence_element_handler_registry =
g_slist_prepend (_mxf_essence_element_handler_registry,
(gpointer) handler);
}
const MXFEssenceElementHandler *
mxf_essence_element_handler_find (const MXFMetadataTimelineTrack * track)
{
GSList *l;
const MXFEssenceElementHandler *ret = NULL;
for (l = _mxf_essence_element_handler_registry; l; l = l->next) {
MXFEssenceElementHandler *current = l->data;
if (current->handles_track (track)) {
ret = current;
}
}
return ret;
}
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