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89 lines
3.4 KiB
89 lines
3.4 KiB
package magic
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import "bytes"
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var (
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// AVIF matches an AV1 Image File Format still or animated.
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// Wikipedia page seems outdated listing image/avif-sequence for animations.
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// https://github.com/AOMediaCodec/av1-avif/issues/59
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AVIF = ftyp([]byte("avif"), []byte("avis"))
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// Mp4 matches an MP4 file.
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Mp4 = ftyp(
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[]byte("avc1"), []byte("dash"), []byte("iso2"), []byte("iso3"),
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[]byte("iso4"), []byte("iso5"), []byte("iso6"), []byte("isom"),
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[]byte("mmp4"), []byte("mp41"), []byte("mp42"), []byte("mp4v"),
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[]byte("mp71"), []byte("MSNV"), []byte("NDAS"), []byte("NDSC"),
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[]byte("NSDC"), []byte("NSDH"), []byte("NDSM"), []byte("NDSP"),
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[]byte("NDSS"), []byte("NDXC"), []byte("NDXH"), []byte("NDXM"),
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[]byte("NDXP"), []byte("NDXS"), []byte("F4V "), []byte("F4P "),
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)
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// ThreeGP matches a 3GPP file.
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ThreeGP = ftyp(
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[]byte("3gp1"), []byte("3gp2"), []byte("3gp3"), []byte("3gp4"),
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[]byte("3gp5"), []byte("3gp6"), []byte("3gp7"), []byte("3gs7"),
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[]byte("3ge6"), []byte("3ge7"), []byte("3gg6"),
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)
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// ThreeG2 matches a 3GPP2 file.
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ThreeG2 = ftyp(
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[]byte("3g24"), []byte("3g25"), []byte("3g26"), []byte("3g2a"),
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[]byte("3g2b"), []byte("3g2c"), []byte("KDDI"),
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)
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// AMp4 matches an audio MP4 file.
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AMp4 = ftyp(
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// audio for Adobe Flash Player 9+
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[]byte("F4A "), []byte("F4B "),
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// Apple iTunes AAC-LC (.M4A) Audio
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[]byte("M4B "), []byte("M4P "),
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// MPEG-4 (.MP4) for SonyPSP
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[]byte("MSNV"),
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// Nero Digital AAC Audio
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[]byte("NDAS"),
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)
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// Mqv matches a Sony / Mobile QuickTime file.
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Mqv = ftyp([]byte("mqt "))
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// M4a matches an audio M4A file.
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M4a = ftyp([]byte("M4A "))
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// M4v matches an Appl4 M4V video file.
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M4v = ftyp([]byte("M4V "), []byte("M4VH"), []byte("M4VP"))
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// Heic matches a High Efficiency Image Coding (HEIC) file.
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Heic = ftyp([]byte("heic"), []byte("heix"))
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// HeicSequence matches a High Efficiency Image Coding (HEIC) file sequence.
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HeicSequence = ftyp([]byte("hevc"), []byte("hevx"))
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// Heif matches a High Efficiency Image File Format (HEIF) file.
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Heif = ftyp([]byte("mif1"), []byte("heim"), []byte("heis"), []byte("avic"))
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// HeifSequence matches a High Efficiency Image File Format (HEIF) file sequence.
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HeifSequence = ftyp([]byte("msf1"), []byte("hevm"), []byte("hevs"), []byte("avcs"))
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// TODO: add support for remaining video formats at ftyps.com.
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)
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// QuickTime matches a QuickTime File Format file.
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// https://www.loc.gov/preservation/digital/formats/fdd/fdd000052.shtml
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// https://developer.apple.com/library/archive/documentation/QuickTime/QTFF/QTFFChap1/qtff1.html#//apple_ref/doc/uid/TP40000939-CH203-38190
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// https://github.com/apache/tika/blob/0f5570691133c75ac4472c3340354a6c4080b104/tika-core/src/main/resources/org/apache/tika/mime/tika-mimetypes.xml#L7758-L7777
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func QuickTime(raw []byte, _ uint32) bool {
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if len(raw) < 12 {
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return false
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}
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// First 4 bytes represent the size of the atom as unsigned int.
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// Next 4 bytes are the type of the atom.
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// For `ftyp` atoms check if first byte in size is 0, otherwise, a text file
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// which happens to contain 'ftypqt ' at index 4 will trigger a false positive.
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if bytes.Equal(raw[4:12], []byte("ftypqt ")) ||
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bytes.Equal(raw[4:12], []byte("ftypmoov")) {
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return raw[0] == 0x00
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}
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basicAtomTypes := [][]byte{
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[]byte("moov\x00"),
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[]byte("mdat\x00"),
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[]byte("free\x00"),
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[]byte("skip\x00"),
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[]byte("pnot\x00"),
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}
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for _, a := range basicAtomTypes {
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if bytes.Equal(raw[4:9], a) {
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return true
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}
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}
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return bytes.Equal(raw[:8], []byte("\x00\x00\x00\x08wide"))
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}
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