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gstreamer/gst/mxf/mxfparse.c
Sebastian Dröge da27eb2380 mxf: Move some static const variables into functions
2009-03-23 15:06:11 +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
gboolean
mxf_is_mxf_packet (const MXFUL * ul)
{
return mxf_ul_is_subclass (MXF_UL (SMPTE), ul);
}
/* SMPTE 377M 6.1: Check if this is a valid partition pack */
gboolean
mxf_is_partition_pack (const MXFUL * ul)
{
if (mxf_ul_is_subclass (MXF_UL (PARTITION_PACK), ul) &&
ul->u[13] >= 0x02 && ul->u[13] <= 0x04 &&
ul->u[14] < 0x05 && ul->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 * ul)
{
if (mxf_is_partition_pack (ul) && ul->u[13] == 0x02)
return TRUE;
return FALSE;
}
/* SMPTE 377M 6.3: body partition pack has byte 14 == 0x03 */
gboolean
mxf_is_body_partition_pack (const MXFUL * ul)
{
if (mxf_is_partition_pack (ul) && ul->u[13] == 0x03)
return TRUE;
return FALSE;
}
/* SMPTE 377M 6.4: footer partition pack has byte 14 == 0x04 */
gboolean
mxf_is_footer_partition_pack (const MXFUL * ul)
{
if (mxf_is_partition_pack (ul) && ul->u[13] == 0x04)
return TRUE;
return FALSE;
}
gboolean
mxf_is_fill (const MXFUL * ul)
{
return (mxf_ul_is_subclass (MXF_UL (FILL), ul));
}
gboolean
mxf_is_primer_pack (const MXFUL * ul)
{
return (mxf_ul_is_subclass (MXF_UL (PRIMER_PACK), ul));
}
gboolean
mxf_is_metadata (const MXFUL * ul)
{
return (mxf_ul_is_subclass (MXF_UL (METADATA), ul));
}
/* SMPTE 377M 8.7.3 */
gboolean
mxf_is_descriptive_metadata (const MXFUL * ul)
{
return (mxf_ul_is_subclass (MXF_UL (DESCRIPTIVE_METADATA), ul));
}
gboolean
mxf_is_random_index_pack (const MXFUL * ul)
{
return (mxf_ul_is_subclass (MXF_UL (RANDOM_INDEX_PACK), ul));
}
gboolean
mxf_is_index_table_segment (const MXFUL * ul)
{
return (mxf_ul_is_subclass (MXF_UL (INDEX_TABLE_SEGMENT), ul));
}
/* SMPTE 379M 6.2.1 */
gboolean
mxf_is_generic_container_system_item (const MXFUL * ul)
{
return (mxf_ul_is_subclass (MXF_UL (GENERIC_CONTAINER_SYSTEM_ITEM), ul) &&
(ul->u[12] == 0x04 || ul->u[12] == 0x14));
}
/* SMPTE 379M 7.1 */
gboolean
mxf_is_generic_container_essence_element (const MXFUL * ul)
{
return (mxf_ul_is_subclass (MXF_UL (GENERIC_CONTAINER_ESSENCE_ELEMENT), ul)
&& (ul->u[12] == 0x05 || ul->u[12] == 0x06
|| ul->u[12] == 0x07 || ul->u[12] == 0x15
|| ul->u[12] == 0x16 || ul->u[12] == 0x17 || ul->u[12] == 0x18));
}
/* SMPTE 379M 8 */
gboolean
mxf_is_generic_container_essence_container_label (const MXFUL * ul)
{
return (mxf_ul_is_subclass (MXF_UL
(GENERIC_CONTAINER_ESSENCE_CONTAINER_LABEL), ul) && (ul->u[12] == 0x01
|| ul->u[12] == 0x02));
}
/* Essence container label found in files generated by Avid */
gboolean
mxf_is_avid_essence_container_label (const MXFUL * ul)
{
return (mxf_ul_is_subclass (MXF_UL (AVID_ESSENCE_CONTAINER_ESSENCE_LABEL),
ul));
}
/* Essence element key found in files generated by Avid */
gboolean
mxf_is_avid_essence_container_essence_element (const MXFUL * ul)
{
return (mxf_ul_is_subclass (MXF_UL (AVID_ESSENCE_CONTAINER_ESSENCE_ELEMENT),
ul));
}
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)
{
static const MXFUMID zero = { {0,} };
return (memcmp (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->msecond = (GST_READ_UINT8 (data + 7) * 1000) / 256;
return TRUE;
}
/* SMPTE 377M 3.3: A value of 0 for every field means unknown timestamp */
gboolean
mxf_timestamp_is_unknown (const MXFTimestamp * a)
{
static const MXFTimestamp unknown = { 0, 0, 0, 0, 0, 0, 0 };
return (memcmp (a, &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->msecond - b->msecond) != 0)
return diff;
else
return 0;
}
gchar *
mxf_timestamp_to_string (const MXFTimestamp * t, gchar str[32])
{
g_snprintf (str, 32,
"%04d-%02u-%02u %02u:%02u:%02u.%03u", t->year, t->month,
t->day, t->hour, t->minute, t->second, t->msecond);
return str;
}
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;
}
gdouble
mxf_fraction_to_double (const MXFFraction * fraction)
{
return ((gdouble) fraction->n) / ((gdouble) fraction->d);
}
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_product_version_is_valid (const MXFProductVersion * version)
{
static const guint8 null[sizeof (MXFProductVersion)] = { 0, };
return (memcmp (version, &null, sizeof (MXFProductVersion)) == 0);
}
/* 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
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)
goto error;
segment->index_entries = g_new0 (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);
entry->slice_offset = g_new0 (guint32, segment->slice_count);
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]);
}
entry->pos_table = g_new0 (MXFFraction, segment->pos_table_count);
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 (!primer->mappings) {
GST_WARNING ("No valid primer pack for this partition");
} else 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));
}
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);
if (pack->reverse_mappings)
g_hash_table_destroy (pack->reverse_mappings);
memset (pack, 0, sizeof (MXFPrimerPack));
pack->next_free_tag = 0x8000;
}
/* 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)
{
if (tag->g_slice)
g_slice_free1 (tag->size, tag->data);
else
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;
}
gboolean
mxf_local_tag_insert (MXFLocalTag * tag, GHashTable ** hash_table)
{
#ifndef GST_DISABLE_GST_DEBUG
gchar str[48];
#endif
g_return_val_if_fail (tag != NULL, FALSE);
g_return_val_if_fail (hash_table != 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);
GST_DEBUG ("Adding local tag 0x%04x with UL %s and size %u", tag,
mxf_ul_to_string (&tag->key, str), tag->size);
g_hash_table_insert (*hash_table, &tag->key, 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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