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info: hide redundant PROF UUID

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This commit is contained in:
Thibault Deckers 2021-07-19 15:47:06 +09:00
parent 6c5536c443
commit c47e6ee6da
2 changed files with 22 additions and 11 deletions
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6
android/app/src/main/kotlin/deckers/thibault/aves/channel/calls/MetadataHandler.kt
View file

@ -184,9 +184,13 @@ class MetadataHandler(private val context: Context) : MethodCallHandler {
metadataMap["Spherical Video"] = HashMap(GSpherical(bytes).describe())
metadataMap.remove(dirName)
}
QuickTimeMetadata.PROF_UUID -> {
// redundant with info derived on the Dart side
metadataMap.remove(dirName)
}
QuickTimeMetadata.USMT_UUID -> {
val bytes = dir.getByteArray(Mp4UuidBoxDirectory.TAG_USER_DATA)
val blocks = QuickTimeMetadata.parseUsmt(bytes)
val blocks = QuickTimeMetadata.parseUuidUsmt(bytes)
if (blocks.isNotEmpty()) {
metadataMap.remove(dirName)
dirName = "QuickTime User Media"

27
android/app/src/main/kotlin/deckers/thibault/aves/metadata/QuickTimeMetadata.kt
View file

@ -9,31 +9,28 @@ class QuickTimeMetadataBlock(val type: String, val value: String, val language:
object QuickTimeMetadata {
// QuickTime Profile Tags
// cf https://exiftool.org/TagNames/QuickTime.html#Profile
// cf https://www.ffmpeg.org/doxygen/1.1/movenc_8c_source.html#l02839
const val PROF_UUID = "50524f46-21d2-4fce-bb88-695cfac9c740"
// QuickTime UserMedia Tags
// cf https://github.com/sonyxperiadev/MultimediaForAndroidLibrary/blob/master/library/src/main/java/com/sonymobile/android/media/internal/VUParser.java
// cf https://rubenlaguna.com/post/2007-02-25-how-to-read-title-in-sony-psp-mp4-files/
// cf https://exiftool.org/TagNames/QuickTime.html#UserMedia
const val USMT_UUID = "55534d54-21d2-4fce-bb88-695cfac9c740"
private const val METADATA_BOX_ID = "MTDT"
fun parseUsmt(data: ByteArray): List<QuickTimeMetadataBlock> {
fun parseUuidUsmt(data: ByteArray): List<QuickTimeMetadataBlock> {
val blocks = ArrayList<QuickTimeMetadataBlock>()
val boxType = String(data.copyOfRange(4, 8))
if (boxType == METADATA_BOX_ID) {
blocks.addAll(parseQuicktimeMtdtBox(data))
val boxHeader = BoxHeader(data)
if (boxHeader.boxType == METADATA_BOX_ID) {
blocks.addAll(parseQuicktimeMtdtBox(boxHeader, data))
}
return blocks
}
private fun parseQuicktimeMtdtBox(data: ByteArray): List<QuickTimeMetadataBlock> {
private fun parseQuicktimeMtdtBox(boxHeader: BoxHeader, data: ByteArray): List<QuickTimeMetadataBlock> {
val blocks = ArrayList<QuickTimeMetadataBlock>()
var bytes = data
val boxDataSize = BigInteger(data.copyOfRange(0, 4)).toInt()
val blockCount = BigInteger(bytes.copyOfRange(8, 10)).toInt()
bytes = bytes.copyOfRange(10, boxDataSize)
bytes = bytes.copyOfRange(10, boxHeader.boxDataSize)
for (i in 0 until blockCount) {
val blockSize = BigInteger(bytes.copyOfRange(0, 2)).toInt()
@ -90,3 +87,13 @@ object QuickTimeMetadata {
return "$c1$c2$c3"
}
}
class BoxHeader(bytes: ByteArray) {
var boxDataSize: Int = 0
var boxType: String
init {
boxDataSize = BigInteger(bytes.copyOfRange(0, 4)).toInt()
boxType = String(bytes.copyOfRange(4, 8))
}
}