62 lines
2.3 KiB
Go
62 lines
2.3 KiB
Go
// Copyright 2024 Martin Riedl
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package gomp4
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// MovieFragmentBox Movie Fragment Box struct
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//
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// 8.8.4 Movie Fragment Box
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// Box Type: ‘moof’
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// Container: File
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// Mandatory: No
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// Quantity: Zero or more
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//
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// The movie fragments extend the presentation in time. They provide the information that would
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// previously have been in the Movie Box. The actual samples are in Media Data Boxes, as usual, if they are
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// in the same file. The data reference index is in the sample description, so it is possible to build
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// incremental presentations where the media data is in files other than the file containing the Movie Box.
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//
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// The Movie Fragment Box is a top‐level box, (i.e. a peer to the Movie Box and Media Data boxes). It
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// contains a Movie Fragment Header Box, and then one or more Track Fragment Boxes.
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//
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// NOTE There is no requirement that any particular movie fragment extend all tracks present in the movie
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// header, and there is no restriction on the location of the media data referred to by the movie fragments.
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// However, derived specifications may make such restrictions.
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type MovieFragmentBox struct {
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*Box
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ChildBoxes []any
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}
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// BoxTypeMovieFragment Movie Fragment Box
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const BoxTypeMovieFragment = "moof"
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func init() {
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BoxDefinitions = append(BoxDefinitions, BoxDefinition{
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Type: BoxTypeMovieFragment,
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ParentTypes: []string{boxTypeParentFile},
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Parser: ParseMovieFragmentBox,
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})
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}
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// ParseMovieFragmentBox creates a new movie fragment box struct based on bytes
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func ParseMovieFragmentBox(parser *Parser, filePosition uint64, headerSize uint32, content []byte) (any, error) {
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box := &MovieFragmentBox{
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Box: &Box{filePosition, headerSize},
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}
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// parse child boxes
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var err error
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box.ChildBoxes, err = box.parseChildBoxes(parser, BoxTypeMovieFragment, filePosition, content)
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return box, err
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}
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