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-rw-r--r--gst/mxf/mxful.c268
1 files changed, 268 insertions, 0 deletions
diff --git a/gst/mxf/mxful.c b/gst/mxf/mxful.c
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+++ b/gst/mxf/mxful.c
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+/* GStreamer
+ * Copyright (C) <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 <string.h>
+
+#include "mxful.h"
+
+const MXFUL _mxf_ul_table[] = {
+ /* SMPTE */
+ {{0x06, 0x0e, 0x2b, 0x34, 0x00,}},
+ /* FILL, SMPTE 336M */
+ {{0x06, 0x0e, 0x2b, 0x34, 0x01, 0x01, 0x01, 0x01,
+ 0x03, 0x01, 0x02, 0x10, 0x01, 0x00,}},
+ /* PARTITION_PACK, SMPTE 377M 6.1 */
+ {{0x06, 0x0e, 0x2b, 0x34, 0x02, 0x05, 0x01, 0x01,
+ 0x0d, 0x01, 0x02, 0x01, 0x01, 0x00,}},
+ /* PRIMER_PACK, SMPTE 377M 8.1 */
+ {{0x06, 0x0e, 0x2b, 0x34, 0x02, 0x05, 0x01, 0x01,
+ 0x0d, 0x01, 0x02, 0x01, 0x01, 0x05, 0x01, 0x00}},
+ /* METADATA, SMPTE 377M 8.6 */
+ {{0x06, 0x0e, 0x2b, 0x34, 0x02, 0x53, 0x01, 0x01,
+ 0x0d, 0x01, 0x01, 0x01, 0x01, 0x00,}},
+ /* DESCRIPTIVE_METADATA, SMPTE 377M 8.7.3 */
+ {{0x06, 0x0e, 0x2b, 0x34, 0x02, 0x00, 0x01, 0x01,
+ 0x0d, 0x01, 0x04, 0x01, 0x00,}},
+ /* RANDOM_INDEX_PACK, SMPTE 377M 11.1 */
+ {{0x06, 0x0e, 0x2b, 0x34, 0x02, 0x05, 0x01, 0x01,
+ 0x0d, 0x01, 0x02, 0x01, 0x01, 0x11, 0x01, 0x00}},
+ /* INDEX_TABLE_SEGMENT, SMPTE 377M 10.2.2 */
+ {{0x06, 0x0e, 0x2b, 0x34, 0x02, 0x53, 0x01, 0x01,
+ 0x0d, 0x01, 0x02, 0x01, 0x01, 0x10, 0x01, 0x00}},
+ /* GENERIC_CONTAINER_SYSTEM_ITEM, SMPTE 379M 6.2.1 */
+ {{0x06, 0x0e, 0x2b, 0x34, 0x02, 0x00, 0x01, 0x00,
+ 0x0d, 0x01, 0x03, 0x01, 0x00}},
+ /* GENERIC_CONTAINER_ESSENCE_ELEMENT, SMPTE 379M 7.1 */
+ {{0x06, 0x0e, 0x2b, 0x34, 0x01, 0x02, 0x01, 0x00,
+ 0x0d, 0x01, 0x03, 0x01, 0x00,}},
+ /* GENERIC_CONTAINER_ESSENCE_CONTAINER_LABEL, SMPTE 379M 8 */
+ {{0x06, 0x0e, 0x2b, 0x34, 0x04, 0x01, 0x01, 0x00,
+ 0x0d, 0x01, 0x03, 0x01, 0x00,}},
+ /* AVID_ESSENCE_CONTAINER_ESSENCE_ELEMENT, undocumented */
+ {{0x06, 0x0e, 0x2b, 0x34, 0x01, 0x02, 0x01, 0x01,
+ 0x0e, 0x04, 0x03, 0x01, 0x00,}},
+ /* AVID_ESSENCE_CONTAINER_ESSENCE_LABEL, undocumented */
+ {{0x06, 0x0e, 0x2b, 0x34, 0x01, 0x01, 0x01, 0xff,
+ 0x4b, 0x46, 0x41, 0x41, 0x00, 0x0d, 0x4d, 0x4f}},
+};
+
+gboolean
+mxf_ul_is_equal (const MXFUL * a, const MXFUL * b)
+{
+ guint i;
+
+ g_return_val_if_fail (a != NULL, FALSE);
+ g_return_val_if_fail (b != NULL, FALSE);
+
+ for (i = 0; i < 16; i++) {
+ /* registry version */
+ if (i == 7)
+ continue;
+
+ if (a->u[i] != b->u[i])
+ return FALSE;
+ }
+
+ return TRUE;
+}
+
+gboolean
+mxf_ul_is_subclass (const MXFUL * class, const MXFUL * subclass)
+{
+ guint i;
+
+ g_return_val_if_fail (class != NULL, FALSE);
+ g_return_val_if_fail (subclass != NULL, FALSE);
+
+ for (i = 0; i < 16; i++) {
+ if (i == 7)
+ /* registry version */
+ continue;
+
+ if (class->u[i] != 0x00 && class->u[i] != subclass->u[i])
+ return FALSE;
+ }
+
+ return TRUE;
+}
+
+gboolean
+mxf_ul_is_zero (const MXFUL * ul)
+{
+ static const guint8 zero[16] = { 0, };
+
+ g_return_val_if_fail (ul != NULL, FALSE);
+
+ return (memcmp (ul, &zero, 16) == 0);
+}
+
+gboolean
+mxf_ul_is_valid (const MXFUL * ul)
+{
+ guint i, j;
+
+ g_return_val_if_fail (ul != NULL, FALSE);
+
+ for (i = 0; i < 16; i++) {
+ if (ul->u[i] == 0x00) {
+ for (j = i; j < 16; j++) {
+ if (ul->u[j] != 0x00)
+ return FALSE;
+ }
+
+ return TRUE;
+ }
+
+ if (ul->u[i] > 0x7f)
+ return FALSE;
+ }
+
+ return TRUE;
+}
+
+guint
+mxf_ul_hash (const MXFUL * ul)
+{
+ guint32 ret = 0;
+ guint i;
+
+ g_return_val_if_fail (ul != NULL, 0);
+
+ for (i = 0; i < 4; i++)
+ ret ^= (ul->u[i * 4 + 0] << 24) |
+ (ul->u[i * 4 + 1] << 16) |
+ (ul->u[i * 4 + 2] << 8) | (ul->u[i * 4 + 3] << 0);
+
+ return ret;
+}
+
+gchar *
+mxf_ul_to_string (const MXFUL * ul, gchar str[48])
+{
+ gchar *ret = str;
+
+ g_return_val_if_fail (ul != NULL, NULL);
+
+ if (ret == NULL)
+ ret = g_malloc (48);
+
+ g_snprintf (ret, 48,
+ "%02x.%02x.%02x.%02x."
+ "%02x.%02x.%02x.%02x."
+ "%02x.%02x.%02x.%02x."
+ "%02x.%02x.%02x.%02x",
+ ul->u[0], ul->u[1], ul->u[2], ul->u[3],
+ ul->u[4], ul->u[5], ul->u[6], ul->u[7],
+ ul->u[8], ul->u[9], ul->u[10], ul->u[11],
+ ul->u[12], ul->u[13], ul->u[14], ul->u[15]);
+
+ return ret;
+}
+
+MXFUL *
+mxf_ul_from_string (const gchar * str, MXFUL * ul)
+{
+ MXFUL *ret = ul;
+ gint len;
+ guint i, j;
+
+ g_return_val_if_fail (str != NULL, NULL);
+
+ len = strlen (str);
+ if (len != 47) {
+ GST_ERROR ("Invalid UL string length %d, should be 47", len);
+ return NULL;
+ }
+
+ if (ret == NULL)
+ ret = g_new0 (MXFUL, 1);
+
+ memset (ret, 0, 16);
+
+ for (i = 0, j = 0; i < 16; i++) {
+ if (!g_ascii_isxdigit (str[j]) ||
+ !g_ascii_isxdigit (str[j + 1]) ||
+ (str[j + 2] != '.' && str[j + 2] != '\0')) {
+ GST_ERROR ("Invalid UL string '%s'", str);
+ if (ul == NULL)
+ g_free (ret);
+ return NULL;
+ }
+
+ ret->u[i] = (g_ascii_xdigit_value (str[j]) << 4) |
+ (g_ascii_xdigit_value (str[j + 1]));
+ j += 3;
+ }
+ return ret;
+}
+
+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;
+}
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