48 lines
1.9 KiB
Go
48 lines
1.9 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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// TrackBox track box struct
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//
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// 8.3.1 Track Box
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// Box Type: ‘trak’
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// Container: Movie Box (‘moov’)
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// Mandatory: Yes
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// Quantity: One or more
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//
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// This is a container box for a single track of a presentation. A presentation consists of one or more tracks.
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// Each track is independent of the other tracks in the presentation and carries its own temporal and
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// spatial information. Each track will contain its associated Media Box.
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//
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// Tracks are used for two purposes: (a) to contain media data (media tracks) and (b) to contain
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// packetization information for streaming protocols (hint tracks).
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//
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// There shall be at least one media track within an ISO file, and all the media tracks that contributed to
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// the hint tracks shall remain in the file, even if the media data within them is not referenced by the hint
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// tracks; after deleting all hint tracks, the entire un‐hinted presentation shall remain.
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type TrackBox struct {
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*Box
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ChildBoxes []interface{}
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}
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// ParseTrackBox creates a new track box struct based on bytes
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func ParseTrackBox(filePosition uint64, headerSize uint32, content []byte) (*TrackBox, error) {
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box := &TrackBox{Box: &Box{filePosition, headerSize}}
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// parse child boxes
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var err error
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box.ChildBoxes, err = box.parseChildBoxes(filePosition, content)
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return box, err
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}
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