[automerger] Speed up id3v2 unsynchronization am: f9d87cc8 am: 4da1490a...

}

void ID3::removeUnsynchronization() {

    for (size_t i = 0; i + 1 < mSize; ++i) {

        if (mData[i] == 0xff && mData[i + 1] == 0x00) {

            memmove(&mData[i + 1], &mData[i + 2], mSize - i - 2);

            --mSize;

    // This file has "unsynchronization", so we have to replace occurrences

    // of 0xff 0x00 with just 0xff in order to get the real data.

    size_t writeOffset = 1;

    for (size_t readOffset = 1; readOffset < mSize; ++readOffset) {

        if (mData[readOffset - 1] == 0xff && mData[readOffset] == 0x00) {

            continue;

        }

        // Only move data if there's actually something to move.

        // This handles the special case of the data being only [0xff, 0x00]

        // which should be converted to just 0xff if unsynchronization is on.

        mData[writeOffset++] = mData[readOffset];

    }

    if (writeOffset < mSize) {

        mSize = writeOffset;

    }

}

static void WriteSyncsafeInteger(uint8_t *dst, size_t x) {