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RIFF: Don't let a clamped chunk swallow chunks saved after it (#1482)

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Only the audio chunk (data, or SSND in AIFF) is clamped to the end of
the file when it declares more than the file holds, and its size is
rewritten before a chunk is appended after it. Any other chunk running
past the end, such as a trailing APEv2 tag, ends the chunk walk again,
so a save inserts new chunks ahead of it instead of losing them on the
next read.
This commit is contained in:
Ryan Francesconi
2026-11-01 06:39:07 +01:00
committed by GitHub
parent 80e42828a8
commit 96c7893332
2 changed files with 88 additions and 8 deletions
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tests/test_wav.cpp
+64 -1
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@@ -29,6 +29,7 @@
#include <cstdio>
#include "taglib_config.h"
#include "apetag.h"
#include "tcharset.h"
#include "id3v2tag.h"
#include "infotag.h"
@@ -356,6 +357,8 @@ class TestWAV : public CppUnit::TestFixture
CPPUNIT_TEST(testFuzzedFile1);
CPPUNIT_TEST(testFuzzedFile2);
CPPUNIT_TEST(testFileWithGarbageAppended);
CPPUNIT_TEST(testTrailingAPETagIsNotAChunk);
CPPUNIT_TEST(testSaveAfterOversizedDataChunk);
CPPUNIT_TEST(testStripAndProperties);
CPPUNIT_TEST(testPCMWithFactChunk);
CPPUNIT_TEST(testWaveFormatExtensible);
@@ -1243,7 +1246,7 @@ public:
{
FileStream stream(copy.fileName().c_str());
stream.seek(0, IOStream::End);
constexpr char garbage[] = "\r2345678";
constexpr char garbage[] = "12345678";
stream.writeBlock(ByteVector(garbage, sizeof(garbage) - 1));
stream.seek(0);
contentsBeforeModification = stream.readBlock(stream.length());
@@ -1266,6 +1269,66 @@ public:
}
}
void testTrailingAPETagIsNotAChunk()
{
ScopedFileCopy copy("empty", ".wav");
APE::Tag ape;
ape.setTitle("APE Title");
const ByteVector apeData = ape.render();
{
FileStream stream(copy.fileName().c_str());
stream.seek(0, IOStream::End);
stream.writeBlock(apeData);
}
{
RIFF::WAV::File f(copy.fileName().c_str());
CPPUNIT_ASSERT(f.isValid());
f.ID3v2Tag()->setTitle("ID3v2 Title");
f.InfoTag()->setTitle("INFO Title");
CPPUNIT_ASSERT(f.save());
}
{
RIFF::WAV::File f(copy.fileName().c_str());
CPPUNIT_ASSERT(f.isValid());
CPPUNIT_ASSERT_EQUAL(String("ID3v2 Title"), f.ID3v2Tag()->title());
CPPUNIT_ASSERT_EQUAL(String("INFO Title"), f.InfoTag()->title());
}
{
FileStream stream(copy.fileName().c_str());
stream.seek(-static_cast<offset_t>(apeData.size()), IOStream::End);
CPPUNIT_ASSERT_EQUAL(apeData, stream.readBlock(apeData.size()));
}
}
void testSaveAfterOversizedDataChunk()
{
ScopedFileCopy copy("empty", ".wav");
{
// empty.wav ends with its "data" chunk; declare 100 bytes more than it holds.
FileStream stream(copy.fileName().c_str());
stream.seek(40);
const unsigned int dataSize = stream.readBlock(4).toUInt(false);
stream.seek(40);
stream.writeBlock(ByteVector::fromUInt(dataSize + 100, false));
}
{
RIFF::WAV::File f(copy.fileName().c_str());
CPPUNIT_ASSERT(f.isValid());
f.ID3v2Tag()->setTitle("ID3v2 Title");
f.InfoTag()->setTitle("INFO Title");
CPPUNIT_ASSERT(f.save());
}
{
RIFF::WAV::File f(copy.fileName().c_str());
CPPUNIT_ASSERT(f.isValid());
CPPUNIT_ASSERT_EQUAL(String("ID3v2 Title"), f.ID3v2Tag()->title());
CPPUNIT_ASSERT_EQUAL(String("INFO Title"), f.InfoTag()->title());
RIFF::WAV::File original(TEST_FILE_PATH_C("empty.wav"));
CPPUNIT_ASSERT_EQUAL(original.audioProperties()->lengthInMilliseconds(),
f.audioProperties()->lengthInMilliseconds());
}
}
void testStripAndProperties()
{
ScopedFileCopy copy("empty", ".wav");