virtual float scoreFactory(const sp<IMediaPlayer>& /*client*/,
                               int fd,
                               int64_t offset,
                               int64_t length,
                               float /*curScore*/) {
        if (legacyDrm()) {
            sp<DataSource> source = new FileSource(dup(fd), offset, length);
            String8 mimeType;
            float confidence;
            if (SniffWVM(source, &mimeType, &confidence, NULL /* format */)) {
                return 1.0;
            }
        }

        if (getDefaultPlayerType() == STAGEFRIGHT_PLAYER) {
            char buf[20];
            lseek(fd, offset, SEEK_SET);
            read(fd, buf, sizeof(buf));
            lseek(fd, offset, SEEK_SET);

            uint32_t ident = *((uint32_t*)buf);

            // Ogg vorbis?
            if (ident == 0x5367674f) // 'OggS'
                return 1.0;
        }

        return 0.0;
    }
    virtual float scoreFactory(const sp<IMediaPlayer>& /*client*/,
                               int fd,
                               int64_t offset,
                               int64_t /*length*/,
                               float /*curScore*/) {
        if (getDefaultPlayerType()
                == STAGEFRIGHT_PLAYER) {
            char buf[20];
            lseek(fd, offset, SEEK_SET);
            read(fd, buf, sizeof(buf));
            lseek(fd, offset, SEEK_SET);

            uint32_t ident = *((uint32_t*)buf);

            // Ogg vorbis?
            if (ident == 0x5367674f) // 'OggS'
                return 1.0;
        }

        return 0.0;
    }