hintudta.c
资源名称:NETVIDEO.rar [点击查看]
上传用户:sun1608
上传日期:2007-02-02
资源大小:6116k
文件大小:3k
源码类别:
流媒体/Mpeg4/MP4
开发平台:
Visual C++
- /*
- * The contents of this file are subject to the Mozilla Public
- * License Version 1.1 (the "License"); you may not use this file
- * except in compliance with the License. You may obtain a copy of
- * the License at http://www.mozilla.org/MPL/
- *
- * Software distributed under the License is distributed on an "AS
- * IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
- * implied. See the License for the specific language governing
- * rights and limitations under the License.
- *
- * The Original Code is MPEG4IP.
- *
- * The Initial Developer of the Original Code is Cisco Systems Inc.
- * Portions created by Cisco Systems Inc. are
- * Copyright (C) Cisco Systems Inc. 2000, 2001. All Rights Reserved.
- *
- * Contributor(s):
- * Dave Mackie dmackie@cisco.com
- */
- #include "quicktime.h"
- int quicktime_hint_udta_init(quicktime_hint_udta_t *hint_udta)
- {
- quicktime_hinf_init(&(hint_udta->hinf));
- quicktime_hint_hnti_init(&(hint_udta->hnti));
- }
- int quicktime_hint_udta_delete(quicktime_hint_udta_t *hint_udta)
- {
- quicktime_hinf_delete(&(hint_udta->hinf));
- quicktime_hint_hnti_delete(&(hint_udta->hnti));
- }
- int quicktime_hint_udta_dump(quicktime_hint_udta_t *hint_udta)
- {
- printf(" udtan");
- quicktime_hinf_dump(&hint_udta->hinf);
- quicktime_hint_hnti_dump(&hint_udta->hnti);
- }
- int quicktime_read_hint_udta(quicktime_t *file, quicktime_hint_udta_t *hint_udta, quicktime_atom_t *parent_atom)
- {
- quicktime_atom_t leaf_atom;
- do {
- /* udta atoms can be terminated by a 4 byte zero */
- if (parent_atom->end - quicktime_position(file) < HEADER_LENGTH) {
- u_char trash[HEADER_LENGTH];
- int remainder = parent_atom->end - quicktime_position(file);
- quicktime_read_data(file, trash, remainder);
- break;
- }
- quicktime_atom_read_header(file, &leaf_atom);
- if (quicktime_atom_is(&leaf_atom, "hinf")) {
- quicktime_read_hinf(file, &(hint_udta->hinf), &leaf_atom);
- } else if (quicktime_atom_is(&leaf_atom, "hnti")) {
- quicktime_read_hint_hnti(file, &(hint_udta->hnti), &leaf_atom);
- } else {
- quicktime_atom_skip(file, &leaf_atom);
- }
- } while (quicktime_position(file) < parent_atom->end);
- }
- int quicktime_write_hint_udta(quicktime_t *file, quicktime_hint_udta_t *hint_udta)
- {
- quicktime_atom_t atom;
- if (hint_udta->hnti.sdp.string == NULL) {
- return;
- }
- quicktime_atom_write_header(file, &atom, "udta");
- quicktime_write_hinf(file, &(hint_udta->hinf));
- quicktime_write_hint_hnti(file, &(hint_udta->hnti));
- quicktime_atom_write_footer(file, &atom);
- }