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#2451 Better MP3 stream matching

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This commit is contained in:
Jindra Petřík
2025-06-08 23:07:56 +02:00
parent aeb5a51c7e
commit feb4102b85
2 changed files with 40 additions and 10 deletions
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libsrc/ffdec_lib/src/com/jpexs/decompiler/flash/timeline/SoundStreamFrameRange.java
+22
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@@ -16,6 +16,7 @@
*/
package com.jpexs.decompiler.flash.timeline;
import com.jpexs.decompiler.flash.SWFInputStream;
import com.jpexs.decompiler.flash.tags.SoundStreamBlockTag;
import com.jpexs.decompiler.flash.tags.base.SoundStreamHeadTypeTag;
import com.jpexs.decompiler.flash.tags.base.SoundTag;
@@ -24,8 +25,11 @@ import com.jpexs.decompiler.flash.treeitems.TreeItem;
import com.jpexs.decompiler.flash.types.sound.SoundExportFormat;
import com.jpexs.decompiler.flash.types.sound.SoundFormat;
import com.jpexs.helpers.ByteArrayRange;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import java.util.logging.Level;
import java.util.logging.Logger;
/**
* SoundStream blocks across frame range.
@@ -109,6 +113,24 @@ public class SoundStreamFrameRange implements TreeItem, SoundTag {
return ret;
}
public int getSeekSamples() {
if (blocks.isEmpty()) {
return 0;
}
if (getSoundFormatId() != SoundFormat.FORMAT_MP3) {
return 0;
}
ByteArrayRange data = blocks.get(0).streamSoundData;
SWFInputStream sis;
try {
sis = new SWFInputStream(null, data.getRangeData(0, 4));
sis.readUI16("numSamples");
return sis.readSI16("seekSamples");
} catch (IOException ex) {
return 0;
}
}
@Override
public int getSoundFormatId() {
return head.getSoundFormatId();